2006年1月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL January 2006

Vol.60 No.1 CONTENTS
New Year's Speech

Masaaki Miwa…(1)The Special Issue of JAPAN TAPPI 2005 Annual Meeting at Niigata
General Review of JAPAN TAPPI 2005 Annual Meeting at Niigata

Planning Subcommittee, JAPAN TAPPI…(5)Keynote Address

Masaaki Miwa…(16)Lecture by Winner of 2004 JAPAN TAPPI Prize…(24)

A Visit to Niigata Mill ―Hokuetsu Paper Mills, Ltd.―…(32)

Technical Report
The Backing Roll Auto―Sanding Device

Atsuo Murata…(39)High Performance Flotator for Smaller Ink Particles Removal，“MT―Flotator”

Naouki Iwasige…(46)

Improvement to Reduce the Industrial Waste Using New Ecological Packaging System “Rock'n
Pop System”for PPC Paper Products

Hideo Akikawa and Koki Takeda…(52)Development of High―Quality Newsprint for Next Generation

Fuminari Nonomura…(59)The Experience of ECF Bleaching Plant Operation

Norimasa Miyake…(64)Development of Salt Tolerant Eucalyptus Globulus by Selection

Akira Murakami…(69)Present Situation and Future Prospects for the Establishment of JIS Pulp and Paper

Takayuki Okayama…(75)Test Standards
Development of On―line Fiber Orientation Sensor System（Dielectric Type）―Approach to the Practical Use―
Hidetada Sawamoto, Shinichi Nagata, Noriaki Kurogi, Junichi Kanayama and Yoshiteru Setoguchi…(83)
Microstructural Analysis of Pigment on IJ Media Surfaces

Yukino Yasuta…(92)Operational Experience of Paper Sludge Carbonizing Plant

Kazuaki Shimizu…(98)Operating Experience of Paper Sludge Incinerator
Minoru Fukuda, Hidenori Mochizuki and Hitoshi Kondo…(106)Committee report…(03)

Coffee break…(113)

Papyrus…(114)

Industry News（Domestic and International）…(118)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(130)

List of Patents issued and Laid―open Publication…(132)

Price list of Domestic Logs and Wood Chips by District…(143)

Wholesale Price list of Papers at Tokyo Trade Center…(144)

Other Monthly Statistics…(146)

News from the Association…(148)

2006年1月

紙パ技協誌[プリント用ページ]
The Backing Roll Auto-Sanding Device
Atsuo Murata
Robot and Environment Div., SERVOARM Co., Ltd.
Servoarm Co., Ltd. is an enterprising company that makes the best use of its long cultivated hydraulic and electronic control technology todevelop truly useful and problem solving devices to meet the particular needs of the customers.
Among our many special purpose devices, The Backing Roll Auto-Sanding Device was nominated and won the most honorable award in thepaper making industry, the “Sasaki Award”.
This highly versatile device, not only cleans the contaminants oﬀ the backing roll during operation without stopping the line, it also polishes
and grinds off scratches from the backing roll to keep its surface always clean.
Although there were many problems when cleaning the backing roll, by introducing The Backing Roll Auto-Sanding Device, the following
effects and merits have been achieved:
Operators are protected from the dangers of cleaning the roll during operation.
Quality of paper is maintained due to the clean roll.
Productivity is improved by lessening downtime of the operation line.
Life span of the backing roll and the coating machine related parts and apparatus are increased.
Close collaboration with our customers is the key to new developments, and we at Servoarm continuously strive to develop new and usefuldevices to actively serve the paper making industry.

High performance Flotator for smaller ink particles removal, “ MT - Flotator”
Naouki Iwasige
Voith IHI Paper Technology Co., Ltd.
Flotation is the most important process for increasing brightness, removing hydrophobic contaminants in Deinking system. Particularly,
smaller ink particles have a big influence on brightness than bigger ones.
Since 1985, many new Technologies were applied for NDIP (News to News) to detach ink particles from ﬁbers and therefore improveappearance of the paper. As an example there is theHigh consistency pulping, Serial Kneading/Dispersing, high consistency soaking and new

type of Soap with strong penetration.
The result was that ink particles were made smaller and smaller during the detachment of the deinking process. Because of that deinking
system requires the removal of smaller particles by innovative flotators.
In 1990, the MT-Flotator has been developed by Ishikawajima Heavy Industries (IHI), Ishikawajima Industrial Machinery (IIM) and wasawarded the Sasaki’s prize by Japan Tappi on 2005. Since 2001, Voith-IHI Paper Technology Co., Ltd. is the developing centre of MT-Flotator
technology. This presentation picks up some of the advanced technologies of the MT-Flotator. Additional to that the new generation of MTⅡFlotator is also introduced.

Improvement to Reduce the Industrial Waste Using New Ecological Packaging System “Rock’n Pop System” for PPC Paper Products
Hideo Akikawa and Koki Takeda
Nichinan Mill, Oji Paper Co., Ltd.
The stretched ﬁlm are wrapped on the box of PPC to keep optimum stacking shape these boxes on a palette.
We developed new system “Rock’n Pop System” to reduce the Wrapping ﬁlm using water-solved glue during each PPC box.
Therefore, we achieved to reduce the half of industrial waste.

Development of High-Quality Newsprint for Next Generation
Fuminari Nonomura
Nippon Paper Industries Co., Ltd.

High quality newsprint features high opacity in multi color printing and also serves not only to increase the satisfaction of newspaper readers
but also to enhance the value of paper as an advertising media. As a part of its initiative to develop high quality newsprint Nippon Paper
Industries has been taking several steps to employ neutralized paper manufacturing process in its mills since 1997. This led to the firstmanufacture of high quality newsprint at the Ishinomaki mill in 2003.
It is expected that by June 2006, all eight mills inside and outside of Japan will be able to supply high quality newsprint.
High quality newsprint apart from being manufactured under neutral conditions uses calcium carbonate as ﬁller for enhanced opacity. Someof the advantages high quality newsprint offers in terms quality and eco friendliness are listed below:
・High opacity (Less show through)・Lower emission of carbon dioxide
・Eﬀective use of calcium carbonate originating fromThe Experience of ECF Bleaching Plant Operation
Norimasa Miyake
Kishu Mill, Kishu Paper Co., Ltd.
Kishu mill, Kishu Paper ﬁber line was converted to ECF bleaching sequence in August 2004. This plant was introduced to the hot chlorine
dioxide process (DUAL-D), and this bleaching sequence has D*-EP-D.
Also D*stage tower was adopted the gravity feed system (Difeed system) with the ﬁrst installation in the world.
Bleached pulp qualities has mostly expectation, especially brightness reversion is very low level.
D*：hot chlorine dioxide stage

Development of Salt Tolerant Eucalyptus Globulus by Selection
Akira Murakami
Forestry Science Laboratory, Nippon Paper Co., Ltd.
Selection of Eucalyptus globulus trees, which were excellent in growth and tolerance to aridity, was performed in the Western Australia
plantations of Nippon Paper Company. In order to confirm the inheritance of the selected trees in an early stage, the salt resistance and drought
resistance of those were estimated by laboratory testing of the cultured tissue and the clonal plantlets. It revealed that some individuals could
survive for a short term when the salt contend reached the level of the seawater and the individuals had high drought resistance after watering
was stopped. Trial plantations of the clones were started in Western Australia.

Present Situation and Future Prospects for the Establishment of JIS Pulp and Paper Test Standards
Takayuki Okayama
Tokyo University of Agriculture and Technology
Japan Tappi Pulp and Paper Testing Committee
Recent activities of Japan Pulp and Paper Testing Committee are described in this paper. Four or ﬁve JIS drafts have been newly establishedand revised each year. Most of JIS drafts have been conformed to ISO standards step by step since 1998, so that JIS would not be become anon-tariff barrier.
Recent JIS revisions are as follows. (1) Estimation of contraries, stickies and plastics of recycled pulps would be newly established in JIS pulp
and paper test standards. (2) The diffuse reflectance method with the CIE illuminant C has been accepted in all optical determinations of JIS
pulp and paper test standards. (3) The print-surf surface roughness has been standardized in 2004. Also the St?ckigt sizing method has beenrevised in 2004, although it is not established in ISO standards. (4) Some measurements with new technologies, such as determination of total
chlorine and organically bound chlorine and fiber length measurement with automated optical analysis, would be prepared as JIS pulp andpaper test standards.
This paper summarizes 17 recent standards of JIS published or to be published after 2004.

Development of On-line Fiber Orientation Sensor System (Dielectric Type)−Approach to the Practical Use−

Hidetada Sawamoto and Shinichi Nagata
Advanced Technology Research Laboratory, Oji Paper Co., Ltd.
Noriaki Kurogi
Nichinan Mill, Oji Paper Co., Ltd.
Junichi Kanayama
Yonago Mill, Oji Paper Co., Ltd.
Yoshiteru Setoguchi
Oji Engineering Co., Ltd.
A newly developed on-line ﬁber orientation sensor was installed in a paper machine at Nichinan Mill, and its performance has been examinedat a speed of 580-630 m/min. The accuracy of the measurement of the fiber orientation angle and orientation strength was quite satisfactory,
when the data was compared to that obtained by conventional off-line SST and MOA measurements. An important factor that leads to stable
and reliable data measurements is ensuring the uniform contact of the sensor-head with the surface of running paper. This was made possible
by introducing a special air-driven mechanism to the sensor-head.
This sensor system was found to be capable of measuring basis weight and moisture content of the paper while operating as a ﬁberorientation sensor. The results of these extra measurements are also reported.

Microstructural analysis of pigment on IJ media surfaces
Yukino Yasuta
Research Center, Mitsubishi Paper Mills Limited
The pigmented colorants were observed by following methods.
1) Quantity of colorants on the surface: To evaluate quantity of colorants on the surface of coated layer, media were milled by FIB and ultra
microtome. In comparison with ultra microtome, FIB remained colorants layer and micro porous structure in original state.
2) Surface roughness: Print gloss is related to surface roughness. Surface roughness of printed paper was observed by three diﬀerent
microscopic approaches (confocal microscope, 3D-SEM, AFM). Atomic force microscope is suitable method to measure the surface roughness.

Operational Experience of Paper Sludge Carbonizing Plant
Kazuaki Shimizu
Hokuetsu Paper Mills, Ltd.
The Nagaoka Mill of Hokuetsu Paper Mills, Ltd has been registered to ISO14001 since 1996, making the most of its location in a nature-richarea to be a modern factory that can contribute to the society and environment. Since then we have aimed at environmentally friendly papermaking. In that attempt we found the problem; the disposal of PS (paper sludge) which has high load-environment. As the countermeasure we
installed the PS carbonizing plant in August, 2003, and it started to be in commercial operation in March, 2004 after a long period of the test
operation.
This report shows the process of how we managed the problems that occurred during one year and three months of the commercial operationfrom its beginning to this June.

Operating Experience of Paper Sludge Incinerator
Minoru Fukuda, Hidenori Mochizuki and Hitoshi Kondo
Nippon Daishowa Paperboard Yoshinaga Co., Ltd.
Nippon Daishowa Paperboard Yoshinaga Co., Ltd. has been trying to establish to be urban natural resources recycle mill which make gooduse of good geographical conditions located near the Tokyo metropolitan area.
In Yoshinaga mill, New No.5 incinerator has been operated from December 2002

for the purpose of incinerating P.S. (paper sludge) andgenerating power for mills facilities. This incinerator has the maximum capacity of incinerating P.S. at 330
60t/h steam and the condensing turbine generator generates 10,300kW power.

B.D. ton/d. The boiler generates

This report describes the outline and operating experiences of the incinerator and power generating plant.

2006年2月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL February 2006

Vol.60 No.2 CONTENTS

Papermaking Technology II
Solutions for Deposit on Pre―Drying Part Producing Fine Paper at Kure Mill

Yoshihiko Hirata…(1)Recent Trend of Paper Chemicals for Surface Treatment

Tsuyoshi Haraguchi…(6)―Surface Sizing Agent Polymaron-E100Series―
Trend of Shoe Calender

Setsuo Suzuki…(14)―Application for Bulky Sheet―
Non Contacting Caliper Measurements(Laser Caliper Sensor)

Reijiro Nakano…(19)Optimization with Updating PM4Paper Quality Measurement and Control System at Sendai Mill
Yoshiyuki Shimosu…(26)Latest Tail Threading Technology

Hiroaki Tagashira…(33)Topics & Information
COMPACTBLEACHING™

Martin Ragnar and Kenji Umemura…(41)―Reduces Capital Intensity in the Bleach Plant―
The Corrosion Resistant Materials for the Paper Industry

Hideaki Kawamura and Michio Nishi…(47)

A Novel Insolubilizing System for Polyvinyl Alcohol(PVA)
Hiroaki Yokoi, Hideo Baraki and Kenji Nasu…(54)Development of New Agent for Ink Jet Paper
Kentaro Ono, Hideki Touda and Junji Kasai…(62)Anaerobic Treatment of KP Evaporate Condensate
Hidetaka Taneda, Osamu Asada, Masahiro Murata, Yuko Iijima, Takahide Monma,
Yutaka Nuruki and Isao Onodera…(70)On―line Hardness Measuring System for Paper Roll

Mitsuhiko Matsuda…(75)―"On―line RQP"―
A Report on2005TAPPI Engineering, Puiping and Environmental Conference
Akihiro Kakehi, Takuya Yamamoto and Tadashi Kano…(82)Introduction of Research Laboratories(51)

Hashimoto Laboratory, Department of Applied Chemistry, School of Engineering,…(92)

The University of Tokyo
Research Report
The Eﬀects of Cationic Polymer Addition on Size Retention and Paper Sizing Performance in
Rosin Emulsion Sizing
Pulp and Paper Mills in Japan

Yuko Okusa…(95)(54)―Saga Mill, Oji Paperboard Co., Ltd.―Oji Paperboard Co., Ltd.…(106)Committee report…(03)

Essay on Intellectual Property…(91)

Coffee break…(94)

Papyrus…(112)

Industry News(Domestic and International)…(114)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(128)

List of Patents issued and Laid―open Publication…(131)

Price list of Domestic Logs and Wood Chips by District…(146)

Wholesale Price list of Papers at Tokyo Trade Center…(147)

Other Monthly Statistics…(149)

News from the Association…(151)

2006年2月

紙パ技協誌[プリント用ページ]
Solutions for Deposit on Pre-Drying Part Producing Fine Paper at Kure Mill
Yoshihiko Hirata
Kure Mill, Oji Paper Co., Ltd.
No.5 Paper machine at Kure Mill, which has started operation as a ﬁne paper machine in 1989,also now produces LWC paper in response to
the market demands. Major trouble on Producing Fine paper comes from Spots. Spots originate from DIP for LWC.
This introduces Solutions for the Dirt from Pre-Drying Part

Recent Trend of Paper Chemicals for Surface Treatment- Surface Sizing Agent Polymaron-E100 Series Tsuyoshi Haraguchi
Paper Chemicals Division, Arakawa Chemical Industries, Ltd.
Recently, the paper manufacturing companies in Japan have been increasing waste paper stock usage as a result of taking the environmentand resources-preservation issues into consideration. Besides, the operation of paper machines and coaters at higher speed in order to reduce
the production cost leads to the harder situation for the paper chemicals to show their efficiency. In fact, the retention of internal sizing agentsand the effectiveness of surface sizing agents tend to decrease.
Under the circumstances, it is strongly noticed to make paper with higher qualities and wider versatilities using surface agents that can
improve the surface quality of paper. At this time, we shall present our surface sizing agents, POLYMARON E-100 series, together with thelatest technical tendency of the agents.
POLYMARON E-100 series show higher sizing eﬀect compared with conventional surface sizing agents. Particularly when coated on
neutralized papers, they show excellent sizing effect, writing quality and ink-jet printability. Moreover, they have excellent mechanical stability
and less foaming property which is good for operation.

Trend of Shoe Calender- Application for Bulky Sheet Setsuo Suzuki
Hiroshima R&D Center, Mitsubishi Heavy Industries, Ltd.
Recently better surface for high quality printing and bulky paper for saving pulp consumption are required in our market. Shoe Calender isapplied for paper and paperboard to make bulky sheet. Long nip dwell time and low nip pressure are key factors to make bulky sheet. Uniform
smoothness, high stiffness and better printability are further benefits of shoe calender.
MJ calender is applied the technology from shoe press, and meets above requirement. This paper introduces outline of MJ calender andshows data from the pilot trial and field.

Non Contacting Caliper Measurements (Laser Caliper Sensor)
Nakano, Reijiro
Sales Development Dept., Honeywell K.K.
Direct thickness measurements (also called “caliper” sensors) provide an actual thickness measurement of paper web. There are two methods
used to provide this. The first is to measure the distance between two product contacting sensing “elements”. The other is to assume thedistance between two sensor heads is fixed and to measure the distance to each head from a product to their support. Of the two methods thefirst will typically provide the highest degree of accuracy and repeatability but needs to either physically touch the material to keep the sensing
element at a fixed standoff distance. The contacting sensor sometimes causes the marking, damage and dirt spike problems to products
especially for lightweight papers on high-speed machines and supercalender applications. Also the contacting head of Caliper sensor itself has
abrasion and dirt build-up problems as a maintenance issue.

So the second method has been developed for a long time, but non contacting methods typically have accuracy problems as a scanning online sensor because of the assumed fixed head separation. Honeywell has solved this issue by physically compensating the separation in the twosensing heads and introduced the Non Contacting Laser Caliper. The method for looking at the distance of each sensing head to the sheet andassuming a fixed distance between the two sensing heads is using laser triangulation and Z sensors. This paper presents the new developed
Honeywell NC Laser Caliper.

Optimization with Updating PM4 Paper Quality Measurement and Control System at Sendai Mill
Yoshiyuki Shimosu
Paper Making Department, Chuetsu Pulp & Paper Co., Ltd.
The paper manufactures in Japan have recently faced on necessity of manufacturing of a wide variety of products in small quantities，alongwith competition with the import paper and diverse needs of customer. Therefore, grade change on PM has been being on the rise and more
controllability on PQS (Paper Quality and Control System) has been required for smaller loss on grade change.
In this article, the operational experience of latest PQS which was replaced on Sendai PM4 in 2004 is introduced.

Latest Tail Threading Technology
Hiroaki TagashiraMetso-SHI Co., Ltd.
Paper machine production speed is getting faster, 1900 m/min for LWC, 1600 m/min for ﬁne paper and 1500 m/min for board, andproduction per year is reached to several hundred thousand tons. In high speed machine, to reduce the loss caused by web break and gradechange, and to urge the automation instead of experts, are very important things to improve the production efficient.
Metso Paper developed improved tail threading device with advanced vacuum conveyor technology, PressForce for press section, SingleForceand DoubleForce1 for dryer section and FoilForce1 for calendar section. These new tail threading devices shorten tail threading time compared
to conventional systems, enhance both human and mechanical safety by eliminating rope accidents, increase production line efficiency andreduce unexpected production downtime.

COMPACT BLEACHING™
- Reduces Capital Intensity in the Bleach Plant Martin Ragnar
Kvaerner Pulping AB, Sweden
Kenji Umemura
Kvaerner Pulping KK, Project Department
The technology relating to the bleaching of pulp relates not only to the chemicals used in the bleaching sequence but also to the washers andhow the bleaching system as a whole is designed. In this paper, a novel bleach plant system called Compact Bleaching™ is presented. Thissystem represents a paradigm shift in the design of a bleach plant, as it addresses a number of hot topics. With a Compact Bleaching™ bleachplant it is possible to reduce the electrical energy consumption by some 25 %, to handle the pulp fibers more gently and to reduce the building
volume by as much as 25-50 %.

The Corrosion Resistant Materials for the Paper Industry
Hideaki Kawamura and Michio Nishi,
KITZ Corp.
For the extension of the valve durability, KITZ has developed and manufactured high corrosion resistance valves such as super-duplex
stainless castings and pure nickel castings and so on. On this paper we report on the effect on the corrosion resistance of the alloy elements andon the corrosion examination test results in the corrosion medium such as sulfuric acid, chlorine dioxide and ozone of used by the paper
manufacture industry.

A Novel Insolubilizing System for Polyvinyl Alcohol (PVA)
Hiroaki Yokoi, Hideo Baraki and Kenji Nasu
SEIKO PMC CORPORATION, R&D Division
Recently, demands for eﬃcient insolubilizing systems for polyvinyl alcohol (PVA) have been increased with market expansion ofcommunications paper such as thermal paper. Various kinds of insolubilizing systems have been developed, but there are still problems to besolved, for example, insufficient performance, corrosion of thermal head in printer due to chloride ions. Thus, we have developed a novel
insolubilizing system composed of carboxylated anionic PVA (A-PVA), polyamide-epichlorohydrin (PAE) and polyethyleneimine (PEI). Our
novel system with insolubilizing agents called “PVA insolubilizer, CP series” has advantages of performance and reduction in chloride ioncontents over A-PVA/PAE combination system.
First, performances of various systems with or without PAE/PEI were studied for diﬀerent types of PVAs, using cast ﬁlm from their solution.
The results showed that A-PVA/PAE/PEI combination system has an excellent insolubility. Application to over-coated layer in thermal paper isalso exemplified. Then, mechanism of insolubilization by the combination system is briefly discussed.

Development of New Agent for Ink Jet Paper
Kentaro Ono, Hideki Touda and Junji Kasai
ZEON CORPORATION, R&D Center, Elastomer & C5 Chemicals
Recently, the growth of Ink jet Paper industry is remarkable. That is because the quality of Ink Jet printing method has improved especially at
personal use.
The coating layer of Ink Jet paper include a large amount of cationic resins compared with oﬀset printing paper system. Because the cation
resins work as a receptor of anionic Ink jet reagent. The common SBR latexes have been used at Offset printing paper as a binder of coating
layer. On the other hand, Polyvinyl alcohol (PVA) is the main binder polymer of Ink jet printing because normal SBR Latexes are modified byanionic surfactant, so it caused coagulation between anionic latex and cationic resin.
In this case PVA-g-Latexes are developed as using just PVA as protective colloid having stability against cationic chemicals. In this report thecharacteristics of PVA-g-Latex and application as a binder of Ink Jet coating layer are introduced.

Anaerobic Treatment of KP Evaporate Condensate
Hidetaka Taneda, Osamu Asada, Masahiro Murata, Yuko Iijima, Takahide Monma, Yutaka Nuruki and Isao Onodera
Nippon Paper Industries Co., Ltd.
Yufutsu mill of Nippon Paper Industries has started a long term trial on anaerobic treatment of the operational condensation from KP black
liquor. In this trial, the effect of the condensation variation on the removal rate at this plant was observed. After several arrangements, thissystem will help the mill to decrease COD discharge and supply new energy resources without any cost increase.

On-line Hardness Measuring System for Paper Roll
“On-line RQP”
Mitsuhiko Matsuda
Nomura Shoji Co., Ltd.
Uniformity in hardness of paper rolls is well known as one of important properties to avoid paper break and registering error during printing
process where paper speed is increasing year by year. Therefore, to get accurate hardness profile on every paper roll is essential to establish areliable quality management system.
In 2003, Tapio Technologies Oy, a laboratory equipment manufacturer in Finland launched a handheld Roll Quality Proﬁler, RQP, withwhich anybody can easily and quickly measure paper roll hardness profile on paper rolls.
Based on the advantage in design and experience in the handheld RQP, Tapio Technologies Oy has developed a new On-line Roll Quality
Profiler, “On-line RQP”, and Nomura Shoji Co., Ltd. has started sales of On-line RQP here in Japan.

A Report on 2005 TAPPI Engineering, Pulping and Environmental Conference
Akihiro Kakehi*1, Takuya Yamamoto*2 and Tadashi Kano*3*1 Oji Paper Co., Ltd.
*2 Nippon Paper Industries Co., Ltd.
*3 Japan Technical Association of the Pulp and Paper Industry
2005 TAPPI Engineering, Pulping and Environmental Conference was held on August 28-31, 2005 in Philadelphia, PA. The number ofregistered participants was 457. Japanese participants were three people mentioned above. Seventy sessions were held during three days ofAugust 29-31, six to nine of which were took place simultaneously. The number of presentations was about 180.

The Effects of Cationic Polymer Addition on Size Retention and Paper Sizing Performance in Rosin Emulsion Sizing
Yuko Okusa
Pulp & Paper Industry Section, Kurita Water Industries Ltd.
Various cationic polyacrylamides (C-PAM) were added to pulp slurries for ﬁxing rosin emulsion size, and the polymer properties inﬂuencing
size retention ratio and paper sizing performance were studied. C-PAM with a high cationic density improved the retention ratio of rosin size,
although paper sizing performance was low compared with C-PAM having a low charge density. These results show that sizing performance isinfluenced by not only rosin size content in handsheets but also the properties of C-PAM co-added to pulp slurries.
When calcium carbonate ﬁller and C-PAM with a high charge density were used, rosin emulsion size tended to adsorb on not only pulp ﬁbers
but also the filler. Both size retention and paper sizing performance were improved, when C-PAM was added after the rosin emulsion size
addition to pulp slurries rather than the inverse addition sequence. Furthermore, the longer the duration time between rosin emulsion size and
C-PAM additions was, the lower the size retention as well as the sizing degree of the rosin-sized paper were. These results suggest that C-PAM
should be applied to pulp slurries after the addition of rosin emulsion size for achieving more efficient paper sizing performance.
Keywords:C-PAM, rosin emulsion, fixing agent, sizing degree, retention

2006年3月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL March 2006

Vol.60 No.3 CONTENTS

Process Control and Automation
General Review of 29th Pulp and Paper Process Control Symposium
Process Control and Automation Committee, JAPAN TAPPI…(2)One Duty Support System

Hiroshi Nakano…(22)―We Find You Safely How―
Applying Today's PLC to Process Automation Systems

Jun Ueda…(26)Application of PLC for PA and Future Evolution of PLC―based Process Controller

Masaki Namie…(37)The Most Suitable Management and Cost Reduction Measures of Air for Instruments

Susumu Murayama…(44)About a Maintenance Eﬀect of Instrumentation Equipment by Air Leak Check

Satoshi Muramatsu…(52)Operational Record of Paper Sludge Carbonizing Plant with the Compact PLC Control System
Foundation Fieldbus System Construction by a PC Method

Kinya Kanda…(57)
Hiroyuki Nonomura…(63)

It is Quickly for Investigate the Cause the Trouble by PLC's Monitor

Kouetu Narita…(71)Supervisory Improvement by DCS―PLC Integration

Hidekazu Morimoto…(81)

Topics & Information
Introduction of PLC Instrumentation and Application Example

Hiroshi Omura…(85)Toward Optimization／High Promotion of Eﬃciency of Control Valve Maintenance―Control Valve Maintenance Support System“Valstaﬀ”―

Minoru Fukuda…(93)Performance Improvement of Consistency Proﬁle Control by the Latest CD Adaptive Cotrol
Hironobu Maruno and Takashi Sasaki…(101)Research Report
Water Vapor Transmission Behavior through Porous and Dense Enthalpy
Exchange Sheets Treated with CaCl2，LiCl and Colloidal Silica
Bong―Yeol Yeom and Byoung―Ryul Min…(111)
Pulp and Paper Mills in Japan(55)―Suita Mill, Mishima Paper Co, Ltd.―

Mishima Paper Co, Ltd.…(125)Committee report…(03)

Coffee break…(110)

Papyrus…(131)

Industry News（Domestic and International）…(134)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(147)

List of Patents issued and Laid―open Publication…(150)

Price list of Domestic Logs and Wood Chips by District…(163)

Wholesale Price list of Papers at Tokyo Trade Center…(164)

Other Monthly Statistics…(166)

News from the Association…(168)

2006年3月

紙パ技協誌[プリント用ページ]
One Duty Support System- We Find You Safely How Hiroshi Nakano
Toshiba Mitsubishi-electric industrial systems Co., Ltd.
The labor saving and making work a few operators are promoted in a recent process industry system for making to the conserve cost. Doing
the work done by two or more operators alone increases so far, and how worker's safety is secured becomes a problem.
We Built One duty support system equipped with the life sensor jointly developed with AJINOMOTO Co., Inc. as the solution. We introduce
one duty support system while appropriating the focus to the development of the life sensor.

Applying Today's PLC to Process Automation Systems
Jun Ueda
Mitsubishi Electric Corporation, Industrial Products Marketing Division,
Industrial Products Engineering Department
PLCs as a whole are widely used in the process automation industry. The process control industry has experienced a constant change, such as
downsizing, reduced costs, and standardization, as the forefront for process control.
This article addresses the issues of how today's PLCs in its form are applied to process automation systems.

Application of PLC for PA and Future Evolution of PLC-based Process Controller
Masaki Namie
OMRON Corporation Analog Controller Division
Some users have utilized the PLC for PA since the ﬁrst half of the 1980s; however, it started to be used broadly in late 1990's.
At the beginning, the PLC-based process controller was used for only small-scale batch plants. As the introduction records increases, theapplication of PLC-based process controller has expanded. The duplex controller system accelerated the application expansion and the PLCbased process controller is introduced for continuous operation plants, these days.
In this writing, I will introduce some concrete application cases of PLC-based process controller for PA, the evolution concept of Omron's
PLC "Smart Platform", and the concept of PLC-based process controller "SMARTPROCESS".

The Most Suitable Management and Cost Reduction Measures of Air for Instruments
Susumu Murayama
Oji Paper Co., Ltd., KUSHIRO Mill
Enlargement of instrumentation machinery of 2000 loops was expected by large-scale construction from 1999. I accomplished consumption
up of air for instrumentation with this without building more compressors.
We had promotion of further cost reduction measure after 2003

andI started a new action toward reduction of compressors. As a result, I

realized reduction of annual electricity 2 million kWh, quantity of coolant 77thousand metric ton and got a big energy saving effect.
This paper shows overviews of this action. At the same time, I introduce valve-positioner developed with SP DEVELOPMENTLABORATORY CO., LTD. toward vibration-proof structure and stability control, which played a big role of reducing air consumption.

About a Maintenance Effect of Instrumentation Equipment by Air Leak Check
Satoshi Muramatsu
Tech Tokai Co., Ltd.

Pulp & paper mill selected DCS instead of old controller system now, instrumentation equipment also became electronics type.
However, many pneumatic device still exist, such as a control valve, a ﬁeld type controller, and an automatic guide.
This time, we will make a report on "Air leak check of pneumatic instruments" which was performed by Tech Tokai as a part of energy
conservation activities for two years since April, 2003, from the view point of effects on preventive maintenance of pneumatic instrumentation
apparatus.

Operational Record of Paper Sludge Carbonizing Plant with the Compact PLC Control System
Kinya Kanda
Hokuetsu Paper Mills, Ltd.
The PLC control system has replaced the DCS or the personal computer DCS in recent years. In this situation the Nagaoka Mill of Hokuetsu
Paper Mills, Ltd applied the compact PLC control system to the paper sludge carbonizing plant that had started the test operation since July,
2003.
This plant was the ﬁrst one for the maker. We applied the PLC control system to this plant, because we could change the sequence and thecontrol easily.
It was the ﬁrst time for us to install the PLC control system. This report shows the process of installation and the engineering. Especially wedesigned the part of the engineering by our selves from the first time. Therefore we had a lot of trouble with the interface between the laddersequence and the control loop, the interface between PLC and HMI in comparison with the DCS. This report also shows the above trouble.

Foundation Fieldbus System Construction by a PC Method
Hiroyuki Nonomura
Yufutsu Mill, Nippon Paper Industries Co., Ltd.
It aimed at "Establishment of the Fieldbus that everyone was able to treat at a low price" last year in July, and it set it up in the new
establishment plant of draining the anaerobic equipment by the composition "General-purpose personal computer + Ethernet + Linking Device+ Field equipment " without the adoption case at all at that time. It reports on the development in the obtained finding and the future, because
it was possible to be in normal operation.

It is Quickly for Investigate the Cause the Trouble by PLC's Monitor
Kouetu Narita
Nippon Daishowa Paperboard Tohoku Co., Ltd.
In 1992, NDBTohoku introduced the Voith shoepress due to raise dehydration up at press part for the ﬁrst time in Japan. This press was
remodel from import facility, and the control logic had not established. Therefore we constructed the control logic with manufacturer (IHI).
But, we complained about analyze the factor of sequence delay, because of complicate systems and less operation experience.
For speed up of the failure factor analysis, we observed this shoepress control logic in 2003, using by PLC observation monitor.

Supervisory Improvement by DCS-PLC Integration
Hidekazu Morimoto
Mishima Mill, Daio Paper Corporation
We have renewed the DCS and PLCs for our LKP bleaching & washing plant which has been running since 1984.
Latest models of DCS have the ability to communicate with PLCs of various vendors in high speed owing to protocols adopted.
We have integrated the DCS with the PLCs aiming not only operational improvement, but plant diagnoses through PLCs internal data accessavailability.

Introduction of PLC Instrumentation and Application Example
Hiroshi Omura
Ohnest Co., Ltd.
In the ﬁeld of process instrumentation and control ﬁeld, EI integrated functionality and excelled cost per performance furnished "PLC
instrumentation system" has been expanding the application field where mid to small DCS traditionally has been serving.
It is expected that PLC instrumentation system could be deployed rapidly for environmental satellite control such as utility/waste water
control and monitoring particularly in pulp and paper factories.
We have developed the pH control system to overcome non linear process characteristics by adding fuzzy control function as an advanced
control to PLC instrumentation system and applying continuous flow pump for the actuator.
We expect that these technologies could be utilized as key for the environment monitoring/waste water processing system, which are
expected to be replaced actively hereafter.

Toward Optimization/High Promotion of Efficiency of Control Valve Maintenance- Control Valve Maintenance Support System "Valstaff" Minoru Fukuda
Marketing Department, Advanced Automation Company, Yamatake Corporation
Since the operation of control valve has direct inﬂuence on a process, control valve maintenance has the very important role same with turnapparatuses such as a pump, a turbine, a compressor. The control valve maintenance is dependent on experience of an expert. Since the expert's
age is high, if technical succession is not carried out to the next generation, a possibility that a plant will become unusual will become high.
Therefore, the following is needed, additional data for determining the optimal maintenance cycle of control valve, the tool for performing a
prompt action when a plant becomes unusual, and the diagnosis system which can detect failure of control valve before the abnormalities of aplant occur.
In this report, Control Valve Maintenance Support System "Valstaﬀ" developed in our company for optimization and high promotion ofefficiency of control valve maintenance is proposed.

Performance Improvement of Consistency Profile Control by the Latest CD Adaptive Control
Hironobu Maruno and Takashi Sasaki
P&W Solution Dept., Industrial Automation Systems Business Division,
Yokogawa Electric Corporation
In this paper, we introduce the concept of consistency proﬁle control in B/M9000CS. It is composed of mainly the following four parts. 1)
Virtual actuator corresponding optimizing control. 2) Model predictive control. 3) Auto tuning tool. 4) CD adaptive control. Especially, CD
adaptive control has succeeded to realize world first fully automated identification of mapping. CD adaptive control constantly andautomatically executes analysis and adjustment of mapping during profile control.

Water Vapor Transmission Behavior through Porous and Dense Enthalpy Exchange Sheets Treated with CaCl2, LiCl and Colloidal Silica
Bong-Yeol Yeom and Byoung-Ryul Min
Department of chemical engineering, Yonsei University, Seoul, Korea

This report is concerning the sheet to be utilized to the air-to-air heat exchanger. Observation on the characters of the moisture permeation
for two types of the enthalpy sheet (porous and dense enthalpy sheets) has been conducted. To improve the efficiency of the moisturepermeation through the enthalpy sheet, the moisture absorbents CaCl2, LiCl and colloidal silica have been used. Throughout the wet cup test
according to the ASTM standards, the tests of the moisture permeation according to the changes of the air gap have been conducted. For bothof the porous and dense enthalpy sheets, it showed 2 to 2.5 times of increase for the permeability of water vapor when the air gap reduced from
13 mm to 6 mm. Also, according to the treatment of the moisture absorbent, the permeability of water vapor increased, but after the certain
amount of the processing no further increase of the permeability was shown. For the dense enthalpy sheet compared with the porous enthalpy
sheet, it showed more increase of permeability of water vapor due to the moisture absorbent and also it was seen that the dense enthalpy sheet
has the similar permeability of water vapor to the porous enthalpy sheet’s when processing the moisture absorbent.
Keywords: air-to-air heat exchanger, enthalpy sheet, wet cup test, air gap, permeability, moisture absorbent

2006年4月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL April 2006

Vol. 60 No.4 CONTENTS

Welcoming New Graduates
Clonal Plantation of Eucalyptus globulus

Kazuya Ito…(2)―Selection of Plus Trees and Trial Plantation―
The Latest Energy Saving Process for Secondly Fiber Treatment

Kazumi Fujita…(12)―The Energy Saving Possibility with Newly Developed Technology―
New Modiﬁed Starch for Surface Size Press

Tetsuya Murayama…(25)Removing Paper Machine Bottlenecks with Targeted Rebuilds

Hidehiko Yamazaki…(31)―Recent Topics for Rebuilds of Headbox, Former and Press Sections―
The Advanced Eﬄuent Treatment System in Paper Mill

Takayuki Suzuki and Junichi Miura…(42)―Introduce of WSR Subsystem―
System of Wet―end Chemicals for Neutral Papermaking

Noriyuki Okada…(49)

Design of Internal and Surface Sizing Agent Corresponding to Various Papermaking Conditions
Hiroshi Nakagawa…(56)Development of Cationic Colloidal Silica Treated with Amino―functional Silace for Ink Jet Paper
Mitsuru Ishii, Toshio Kakui, Masao Ishiguro and Sayaka Sato…(63)A Study on Print Gloss of Double Coating
Yoshihiko Hattori, Hiroshi Nakamori and Noriko Kitamura…(71)
A Summary and Operation Experience of Biomass―boiler in Nakoso Mill

Katsuya Furukawa…(81)

Topics & Information
Reports on the6th Pira International Sizing Conference and the Chemical Engineering

Tomohisa Gondo and Akira Isogai…(90)Laboratory of Complutense University of Madrid
Report of the International Chemical Congress of Paciﬁc Basin Societies（PACIFICHEM2005）
Gyosuke Meshitsuka…(94)Introduction of Research Laboratories(52)

Laboratory of Environmental Wood Science, Department of Biological Resources…(98)

Environments,Faculty of Agriculture, Tottori University
Research Report
Eﬀect of Harvesting Time and Stem Height Position on Kenaf Bast Pulp Yield, Viscosity and
Fiber Length
Wiwin Suwinarti and Kazuhiko Sameshima…(101)Elastic Stress Analysis for Case（Square Tubular Panel）of Corrugated Fiber Board Box Shapeunder Uniform Compression at Center in Upper and Lower Edges
Satoru Matsushima and Shigeo Matsushima…(112)
Pulp and Paper Mills in Japan(56)

Agatsuma Plant, LINTEC Corporation

LINTEC Corporation…(131)Committee report…(03)

Essay on Intellectual Property…(97)

Coffee break…(100)

Papyrus…(138)

Industry News（Domestic and International）…(143)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(155)

List of Patents issued and Laid―open Publication…(158)

Price list of Domestic Logs and Wood Chips by District…(169)

Wholesale Price list of Papers at Tokyo Trade Center…(170)

Other Monthly Statistics…(172)

News from the Association…(174)

2006年4月

紙パ技協誌[プリント用ページ]
Clonal Plantation of Eucalyptus globulus- Selection of Plus Trees and Trial Plantation Kazuya Ito
Forestry Research Institute, Research & Development Division, Oji Paper Co., Ltd.
Oji Paper has established over 135,000ha of hardwood plantation overseas to secure its own resources in accordance with environmental
conservation. Forestry Research Institute has established its branches in July 2002 in Australia where there are four plantation projects, toimprove their productivity of hardwood plantation sites mainly by pursuing clonal forestation with plus trees. Firstly, candidates of the plus tree
were selected by growth characteristics (height, diameter, stem form and so on) from several plantation sites where there are much difference inrain fall and edaphic condition. It is very important to improve not only growth but also wood quality from the view point of increasing pulp
quantity produced from a unit area of plantation. Therefore, analysis of wood quality has been carried out to get plus trees with superior wood
quality as well as growth. It was clearly shown that there were great differences of basic density among selected trees with better performance ofgrowth. Trial plantation has been established at two sites in August 2004 using plus trees with better performance of growth and wood quality
to study environmental variation.

The Latest Energy Saving Process for Secondly Fiber Treatment- The Energy Saving Possibility with Newly Developed Technology Kazumi Fujita
Aikawa Iron Works Co., Ltd.
The Pulping, the Screening, and the Reﬁning section. These three sections need especially big energy consumption in a secondly-ﬁber
treating process. Aikawa Iron Works developed new facilities in these three sections which would be keys for global energy-saving needs. In thispaper, we would like to explain these new facilities & system and introduce the energy-saving possibility.

New Modified Starch for Surface Size Press
Tetsuya Murayama
Research and Development Laboratory, Oji Cornstarch Co., Ltd.
The characterizations of new modiﬁed starches for surface size press were indicated in this report. The starches named GRS series weredecrease of retrogradation, and sizing degree of paper coated with GRS series was become higher than with oxidized starch.
As a result, size pressed paper with GRS series improved surface strength of paper.

Removing Paper Machine Bottlenecks with Targeted Rebuilds- Recent Topics for Rebuilds of Headbox, Former and Press Sections Hidehiko Yamazaki
Metso SHI Co., Ltd.
Rebuilding an existing paper machine is often a very proﬁtable way for papermakers to increase the cash ﬂow created by an older paper
machine. Metso Paper has placed particular emphasis in recent years on developing concepts and products specifically for rebuild needs. The
outcome of this work can now be seen as a wide selection of products offering quite possibly the best coverage of all time of specificimprovement targets. Different needs can be addressed through truly different solutions. Selecting the best-fit alternatives will offer great
upgrade options for all paper machines and paper grades.
Metso Paper’s long experience with high-speed paper machines has been put to good use to create more cost-eﬀective small and mid-sized
solutions with the reliability and quality of bigger and faster paper machines.
In this paper, some of the most interesting and latest conﬁgurations available today for rebuilds of wet part area, especially headbox, former
and press sections are discussed.

The Advanced Effluent Treatment System in Paper Mill- Introduce of WSR Subsystem Takayuki Suzuki and Junichi Miura
Voith IHI Paper Technology Co., Ltd.
To achieve an optimal process performance 3 key elements are vital: First, the proper arrangement of water loops, Second, the removal of ash
and colloidal contaminants (e.g. micro stickies). Third, an up-to-date reject handling system for effective preparation of rejects and residuals forincineration (for landfill) in order to meet the standard environmental interface for a modern plant. We can provide you with specificallyengineered integrated subsystem for Water, Sludge and Reject-handling from a single source, customized to meet your needs as an upgrade orfor a new paper mill.
In this time, we introduce Water, Sludge, and Reject system and unique machines.

System of Wet-end Chemicals for Neutral Papermaking
Noriyuki Okada
Sales/Paper Chemicals, BASF Japan Ltd.
Neutral papermaking tends to increase. Increase of pH involves adverse aﬀects such as drop of size degree, increment of foam in white-wateror increase of pitch problem. Therefore, existing chemicals for acid papermaking must be reviewed to redesign optimized system of wet-end
chemicals for neutral papermaking.
Innovative wet-end sizing agent “PMD”, originative retention / drainage system and eﬀective ﬁxation system are introduced for neutral
papermaking in this report.

Design of Internal and Surface Sizing Agent Corresponding to Various Papermaking Conditions
Hiroshi Nakagawa
Paper Chemicals Division, Arakawa Chemical Industries, Ltd.
In the paper industry recent years, it advances toward the direction where use of recycled paper increases from the resource conservation andthe rise of the concern to the environment.
Recently, it is thought that a decrease in the quality of recycled paper used for domestic consumption is advanced from the thing that therecycled paper export ratio to foreign countries has risen.
On the other hand, the amount of water used for papermaking is also advanced to go more closed from the environmental burden and thecost side. As a result, the development of the chemicals that demonstrates an excellent effect for such a change is demanded from the thing thatis the environment that the chemicals for the extraction paper of the rise of white water electric conductivity and an increase of the number ofanion impurities, etc. doesn't demonstrate the effect easily.
Surface sizing agent performance is controlled by the eﬀect of sizing of so on the internal sizing agent is understood, moreover, it is pointed
out to cause the problem (It bubbles, and dirt) in operation etc. in the surface sizing though the effect corresponded to the defect by increasing
the amount of use.
In this lecture, the inﬂuence of the eﬀect on internal and surface sizing agent and the design for sizing agent correspond to these changes aredescribed.

Development of Cationic Colloidal Silica Treated with Amino-functional Silane for Ink Jet Paper
Mitsuru Ishii, Toshio Kakui, Masao Ishiguro and Sayaka Sato
Chemicals Research Laboratories, Lion Corporation

Colloidal silica is well known as nano-particle, which is used for the photo like paper for ink jet printing. Cationic colloidal silica having
positive ζ-potential was obtained by treating the anionic colloidal silica with the amino-functional silane. By using three types of colloidal
silicas, anionic colloidal silica and cationic colloidal silicas with the amino-functional silane and aluminium oxide, the performance of them forink jet paper was investigated. In particular, the pigment inks did not run on the paper coated with the cationic colloidal silica having theamino-functional silane. It seems that the pigment ink having negative ζ-potential strongly adsorbs on the cationic colloidal silica byelectrostatic interaction.

A Study on Print Gloss of Double Coating
Yoshihiko Hattori, Hiroshi Nakamori and Noriko Kitamura
Latex Research Center NIPPON A&L
In our previous paper we found out the porosity of under coating aﬀected the formation of top coating and consequently had someinfluence on the print quality of double coated paper. This time further investigation was done to clarify the mechanism of print gloss
development and ink setting property of double coated paper.
The behavior of ink vehicle was studied and it was found that vehicle of the ink printed on double coated paper penetrated into under coating
through top coating, i.e. the ink holdout of under coating directly affected the ink setting property of double coated paper. On the other handthe print gloss of double coated paper increased with the smoothness of coating surface.
Based on these results, optimal coating design of double coated paper, which provides high print gloss and good ink setting property, wasdiscussed.

A Summary and Operation Experience of Biomass-boiler in Nakoso Mill
Katsuya Furukawa
Nippon Paper Industries Co., Ltd.
The energy supply facilities of this factory were a heavy oil boiler and diesel generation facilities conventionally. They depended on fossil
energy. From the viewpoint of reduction of an energy cost and discharge hold-down of CO2, We planned switch to biomass energy. We started
driving of a biomass boiler in September, 2004.
For this factory, there was not the operation experience of a boiler turbine set. Furthermore, we were inexperienced for a main boiler of thefactory which assumed a small piece of wood fuel. However, we were able to operate facilities by cooperation of an operator and a plant makeron schedule.
Fuel of this biomass boiler is a small piece of wood and coal, but now uses only a small piece of wood. In addition, an original purpose isachieved by operation of a biomass boiler and now operates it without a problem.

Reports on the 6th Pira International Sizing Conference and the Chemical Engineering Laboratory of Complutense University of Madrid
Tomohisa Gondo
Oji Paper Co., Ltd.
Akira Isogai
The University of Tokyo
The 6th Pira International Sizing Conference was held on December 12-14, 2005, in Madrid, Spain. The conference had nineteen papers
concerning internal and surface sizing and about 100 participants. Five presentations were from Universities, one was from partly governmental
institute, and others were from chemical and paper industries. After the conference, the authors had a chance to visit laboratories of Professors
Blanco and Negro, Chemical Engineering, Complutense University of Madrid. The outline of the Pira Conference and the professors’
laboratories are then introduced in this paper.

Report of the International Chemical Congress of Pacific Basin Societies(PACIFICHEM 2005)
Gyosuke Meshitsuka

The University of Tokyo
Paciﬁchem 2005 was held in Hawaii, USA from December 15 to 21, 2005 and more than 11000 scientists including 5600 from Japan
participated from Pan-pacific countries. Among 223 sessions organized during the conference, at least 5 sessions were related to the chemistryof biomass resources and plant organic polymers. At the Session of “Materials, Chemicals and Energy from Forest Biomass”, 62 papers
including 19 poster papers were presented.

Effect of Harvesting Time and Stem Height Position on Kenaf Bast Pulp Yield, Viscosity and Fiber Length
Wiwin Suwinarti and Kazuhiko Sameshima
Kochi University, Faculty of Agriculture
Kenaf variety Tainung-2 and Everglades-41 were planted in May 2003 and harvested at 80, 116 and 153 days after seeding. Kenaf bast ﬁber
was treated by sequence treatments of ammonium oxalate, sodium hydroxide and acidic sodium chlorite (A) and acidic sodium chlorite,ammonium oxalate and sodium hydroxide (B). The agronomic characteristics, pulp yield, viscosity and fiber length were measured. The result
showed pulp yield, viscosity and fiber length was affected by harvesting time. The pulp of 153 days after seeding gave much higher pulp yieldand viscosity but shorter fiber length than those of 80 and 116 days after seeding. The higher stem position has lower pulp yield and viscosity
but longer fiber length. This study also confirmed that the method A is the best method for high viscosity bast pulp production while themethod B is the best method for fiber length preservation and higher pulp yield.
Keywords: Kenaf bast fiber, harvesting time, stem height position, pulp yield, viscosity, fiber length.

Elastic Stress Analysis for Case (Square Tubular Panel) of Corrugated Fiber Board Box Shape under Uniform Compression at Center in Upperand Lower Edges
Satoru Matsushima
Guest Professor, Research Center of District Corporation, Ehime University
Shigeo Matsushima
Professor Emeritus, Ehime University
An elastic stress formulation was expressed for the square tubular case (CFBS: anisotropic panel) of the corrugated ﬁber board box shape(width L, height h) under uniform compression py0 at centers in upper and lower edges. Then from this formulation the stress analysis isperformed, and maximum values (xmax, ymax, xyma, 1min and 1max) for normal stresses x andy to width and height directions and shear stressxy, principal stress 1 and principal shear stress 1 were obtained and characteristic behaviors for xmax, ymax, xymax, 1min and 1max werediscussed.
Rates of values ｘ andxy for the anisotropic case to the isotropic are about xyEx/Ey and ymin/(ymin−xmin) respectively. Ex and Ey areelongational elastic module in width and height directions and xy is Poisson's ratio (strain effect for height direction normal strain to width
direction normal strain). Positions of ymin and1min are in the loading range of upper and lower edges and are independent of the case shapechange, and xymax and1max change as be at positions of distance L/2 ±Δx from corners in upper and lower edges with increases of L and theloading range.

2006年5月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL May 2006

Vol.60 No.5 CONTENTS

Energy Saving I
An Inside Power―plant for the Purpose of Saving Energy and CO2 Reduction

Shigeaki Obayashi…(3)Energy Saving by Introduction of the Gas Turbine Cogeneration System

Hiroshi Nagata…(12)Energy Saving in the Bleaching Plant―Steam Saving Examples by Raising the Temperature of Hot Water―

Tomomi Inaba…(19)Energy Saving with ID―Screen

Hirotada Tsukakoshi…(26)

CO2 Reduction by Remodeling the Existing Boiler to the Gas Firing

Takao Koide…(31)Energy Saving by Installation of Boiler Exhaust Gas Heat Recovery System

Satoshi Takai…(39)

A Reduction Approach to CO2Emissions by Introducing a Large―scale Recovery Boiler
Shigeru Wakamoto…(48)Topics & Information
Water Jet Turning―Up System

Makoto Matsushita…(55)Solutions for High Quality Tissue Creping

Yoshinori Sekiyama…(60)

Low Consistency Reﬁning Technology
LemaxX Spiral―Nature Applied
Kenichi Ito, Yosuke Takeshita and Peter Antensteiner…(66)Wastewater Treatment in Japanese Pulp and Paper Mills Today
Environmental Technical―Committee of Japan Tappi and Environmental Protection Committee, Japan Paper Association…(72)International Conference Report―The5th Biennial Johan Gullichsen Colloquium, Finland―

Toshiharu Enomae…(88)Report of Studying at University of Maine

Kenji Hirai…(96)2005Research Projects of Universities and Government Research Institutes
Wood Science Committee, JAPAN TAPPI…(99)Research Report
Reduction of AOX by Prolonged ClO２

Bleaching under High Temperature andAcidic pH Conditions
Kengo Magara, Tsutomu Ikeda, Tomoko Sugimoto and Shuji Hosoya…(109)
Pulp and Paper Mills in Japan(57)―Ohe Mill, Marusumi Paper Co., Ltd.―

Marusumi Paper Co., Ltd.…(121)Committee report…(03)

Coffee break…(108)

Papyrus…(127)

Industry News(Domestic and International)…(130)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(143)

List of Patents issued and Laid―open Publication…(145)

Price list of Domestic Logs and Wood Chips by District…(156)

Wholesale Price list of Papers at Tokyo Trade Center…(157)

Other Monthly Statistics…(159)

News from the Association…(161)

2006年5月

紙パ技協誌[プリント用ページ]
An Inside Power-plant for the Purpose of Saving Energy and CO2 Reduction
Shigeaki Obayashi
The First Energy Service Company, Limited
The Kyoto Protocol, an international and legally binding agreement on gases emissions has entered into force on 16 February 2005. To meetthis protocol, Japan has to step up in a new phase for CO2 reduction. On the other hand, the law of saving energy, which was established by
METI (Ministry of Economy, Trade and Industry), has been revised several times in order to tighten up the original. So the private sector has
been requested more efforts for saving energy.
Recently, crude-oil price has risen more than twice as compared with that of two years ago, and also has set the record of 70 US dollars per
barrel last summer. Under these circumstances, it is seriously required an introduction of more effective plant system or less fuel consumption
plant.
In this paper, we explain the recent engine for the power generation in the use of an inside power plant, and aim to give some suggestions forsaving energy, reducing CO2 and also saving cost. Also we briefly explain the ESCO (Energy Service COmpany) which is recently adopted inmany companies as a way of introducing plant system for saving energy.

Energy Saving by Introduction of the Gas Turbine Cogeneration System
Hiroshi Nagata
Kanzaki Mill, Oji Paper Co., Ltd.
Located in the city of Amagasaki, Hyogo Prefecture, where the Kanzaki river atributary stream of the Yodo river, the source of which isLake Biwa-flows into the Osaka bay, the Kanzaki mill is an urban-style mill in the Kei-han-shin metropolitan area. The mill has 25 million
population in its background. The mill started the production of coated paper in 1922. The coating technology has been handed down to us
through the mill’s long history. Since then, it has undergone various changes, the mill is well known as a mill manufacturing various processed
paper by the communication paper.
Here, in Amagasaki, as same as in other industrial arrears in Japan, we must positively make eﬀorts to solve the problems in order to meet
more severe environmental standards on air and water pollution, legislated by Amagasaki city and Hyogo prefecture.
Since the mill introduced gas turbine cogeneration system instead of conventional and gas boiler and steam turbine generating system in
September 2003, we introduce the way and result of energy saving by taking this system as a case.

Energy Saving in the Bleaching Plant- Steam Saving Examples by Raising the Temperature of Hot Water Tomomi Inaba
Nippon Daishowa Paperboard Yoshinaga Co., Ltd.
Nippon Daishowa Paperboard Yoshinaga Co., Ltd. has been trying to expand the use of recycled paper with taking advantage of a good
location near the Tokyo metropolitan area.
New No.5 incinerator has been operated from December 2002 for the purpose of incinerating paper sludge and generating power for mills
facilities. But a consumption of fuel oil has been continued at a high level, then we have lost significant earnings as a result of a sharp oil priceincrease in recent years, we have felt a strong need for energy saving.
No.1 bleaching plant is located apart from the cooking plant and the chemical recovery plant, so it can not use the heat from black liquor. For
the reason, it consumes the large amounts of steam.
This report describes steam saving examples by raising the temperature of hot water with using the heat of absorbent in No.5 incinerator
desulfurization equipment.

Energy Saving with ID-Screen
Hirotada Tsukakoshi
Nayoro Mill, Oji Paperboard Co., Ltd.

We have pulper, screen, a process of reﬁner in raw materials process producing wastepulp from wastepaper as facilities using particularly big
energy.
In paper manufacture industry of energy many consumption model, it is a point to be connected directly with cost reduction to promoteenergy saving positively.
I introduce ID technology of Aikawa Iron Works Co., Ltd. into existing screen this time and I remodel it into dilution white water injection
model screen (ID screen) and introduce the example that wrestled to power-saving

CO2 Reduction by Remodeling the Existing Boiler to the Gas Firing
Takao Koide
Power Plant Service Center, Mitsubishi Heavy Industries Limited
KYOTO protocol has taken eﬀect since February 2005 and Japanese government requests industries to reduce 8.6% of CO2 emission in2010 compare to 1990 as the aim. Addition to that, fuel oil price is getting higher recently, because of high crude oil price.
As a result, the company which has oil ﬁring boiler has to study the reduction of CO2 emission and fuel oil cost for boilers.
Therefore, MHI suggests the remodeling the oil ﬁring boiler to the gas ﬁring for the reduction of CO2 emission and fuel oil cost
simultaneously.
In this thesis, general and example of gas ﬁring modiﬁcation are introduced. And also, ﬁnance lease of sate light base for gas supply instead ofgas pipe line, which MHI will provide, is introduced.

Energy Saving by Installation of Boiler Exhaust Gas Heat Recovery System
Satoshi Takai
Nomachi Mill, Chuetsu Pulp & Paper Co., Ltd.
In late year, as the issues concerning Environment and Energy are taken close-up globally, the measures to meet them became the urgent
business. Then so-called Kyoto Protocol was taken effect as an anti-global warming measure in February, 2005. Reduction of the carbon dioxide
discharge was fixed against Japan based on it. Japan Paper Association fixed the following target as a voluntary action plan.
1) Reduce the fossil energy consumption per ton of paper by 13% until 2010 compare with the1990 level2) Reduce the carbon dioxide discharge per ton of paper by 10% until 2010 compare with the1990 level
On the basis of such a world trend, we in Nomachi Mill are wrestling with deducing the environmental load, with promoting the energy
saving and the effective use of waste paper and wood resources. In Nomachi Mill, as a part of long term energy saving, we installed Boiler
Exhaust Gas Heat Recovery System in the effluent gas chimney flue of the No.3 Recovery Boiler in July 2005 and decided to utilize the waste
heat for warming the feed water of the above mentioned boiler. I want to introduce the example as follows.

A Reduction Approach to CO2 Emissions by Introducing a Large-scale Recovery Boiler
Shigeru Wakamoto
Niigata Mill, Hokuetsu Paper Mills, Ltd.
The approach of measures for controlling global warming and energy conservation has became important more and more by coming into
effect the Kyoto Protocol in February, 2005. Additionally, conserving energy has been getting important as a measures of recent sudden rise of
crude petroleum. Hokuetsu Paper, Niigata Mill introduced a large-scale recovery boiler in April, 2005 to replace the superannuated boiler,
decrease the air pollutant, etc. Therefore, the plan of both air pollutant reduction and energy conservation were started by considering the best
operating combinations of the new boiler and the existing boiler. In this report, the approaches of energy conservation and the CO2 reduction
are described after introducing outline of the large-scale recovery boiler.

Water Jet Turning-Up System

Makoto Matsushita
KGK Engineering Corp., NUSM Division
Paper mills have been long after the turn-up eﬃciency improvement and subsequent paper loss reduction. Our full automatic “ReelJet” turnup system (Paprima Industries Inc., Montreal, Canada) uses 2 units of ultra high pressure water-jet cutting head (1300-1500bars/20cc per
turn-up) which run fast (2m/sec) to their waiting position each side of the line to get the sheet expanded to its full width keeping a completely
uniformed wrapping both ways from the center, immediately after the tail has got caught by a new spool with the help of an air-coanda effect ofa specially designed gooseneck. Thus, “Reel Jet” makes it possible to execute turn-ups failure free in such a shorter time span as 2 seconds since
the issue of turn-up command via DCS until the two heads come back to their park-positions.

Also, its beautifully balanced and even wrapping

on a spool can release the reel part from vibration and noise related problems.
Its sales has been expanding among big scale world famous paper machines in Europe and North America, and they are quite satisﬁed with its
overwhelmingly nice performance to cut paper loss and subsequently to improve productivity remarkably. Hereunder, we are going to explain
about its structure and performance.

Solutions for High Quality Tissue Creping
Yoshinori Sekiyama
Sales Engineering Dev., Maintech Co., Ltd.
The Yankee dryer is a critical part of the tissue making process and its surface plays an important roll in achieving good sheet quality.
Therefore, it is imperative that the Yankee surface is well protected. Maintech has developed “Ultra Lubrication Creping” an innovative andunique method in which Yankee dryer is protected by a lubrication coating layer composed of resin and disulfide molybdenum. The resulting
surface reduces the friction between the dryer and doctor blade and extends the life of doctor blade dramatically.
Also, felt ﬁlling due to pitch and/or stickies can lead to any number of problems, including unstable coating layer, poor sheet quality, lost
production, unscheduled shutdowns, and increased operating costs. Maintech has developed a series of deposit control products “MainteClean”
whose amphoteric polymer prevents the pitch and/or stickies from accumulating on the felt and felt rolls. The treated felt gives positive impacts
not only on the felt condition but also on the dryer coating.
This paper reviews the innovative methods of Yankee coating and felt conditioning comparing with conventional methods. Case histories
illustrating gained benefits in tissue grade M/C are presented.

Low Consistency Refining Technology
LemaxX Spiral - Nature Applied
Kenichi Ito
Andritz k.k., Japan
Peter Antensteiner
Durametal Corporation
Andritz is a leading supplier of reﬁning technology in the world. Also Andritz supply wear materials for reﬁning process. Durametal
Corporation, a subsidiary of Andritz, produces the refiner plates. This company has over 8,000 patterns of refiner plates and several new
patterns developing in a week. Also Durametal plans to develop a simulation program “MAGNUS”, it is simulate the “Nature of Refining”
theory. Using this program Durametal Corporation developed The Logarithmic Spiral Design refiner plate LemaxX Spiral.
This report introduces the performance of LemaxX Spiral technology.

Wastewater Treatment in Japanese Pulp and Paper Mills Today
Environmental Technical - Committee of Japan Tappi
Environmental Protection Committee, Japan Paper Association
This survey of wastewater treatment in the Japanese pulp and paper industry is based on operations of 102 mills in 2002. Data covered 98%
of pulp production (except recycled pulp including deinked pulp, DIP) and 89% of the production of paper and board products, and wascompared with the last survey’s in 1991.

As the Japanese economy had been sluggish in this 11 years, pulp production in2002 decreased by 9% and paper and board production was

confined to 10% increase. One third of the mills each produced annually over 0.3million tonnes of market products. 72% of the mills produced
both pulp and paper products. 31% of the mills had kraft pulping process.
Enclosed

Half of the mills discharged eﬄuents into rivers and 41% into seas.

coastal seas (Tokyo Bay, Ise Bay and Seto Inland Sea) received eﬄuents from

30% of the mills.

Enhanced awareness of the environmental preservation in Japan has further strengthened the eﬄuent limitations. Discharge limits ofsuspended solids (SS) and biological oxygen demand (BOD5) were lowered by an average of 20% and chemical oxygen demand (CODMn) by
10%.
As the results of sustained eﬀort of the Japanese pulp and paper industry, the average speciﬁc discharge of SS in 2002 has decreased to 2.6 kg
per ton of market products, BOD to 2.8 kg/t , COD to 7.4 kg/t, and the average specific consumption of water has been lowered to 88 m3 /t ,which corresponded to a reduction of 29% on SS, 42% on BOD, 30% on COD and 16% on water consumption.
Though coagulation-sedimentation was still the mainstream of wastewater treatment, the multistage processing including some biologicaltreatments has spread progressively. Many activated sludge plants have shifted their aeration gas from air to oxygen, and then more than 50%
of BOD and COD loads in wastewater have been removed by the activated sludge process.
The average operational staﬀ of wastewater treatment was 4.7, decreased to one third from 1991.

International Conference Report― The 5th Biennial Johan Gullichsen Colloquium, Finland ―Toshiharu Enomae
Graduate School of Agricultural and Life Sciences, The University of Tokyo
On November 17th, 2005, the 5th Biennial Johan Gullichsen Colloquium was held in Helsinki, Finland. This colloquium was initiated byProfessor (currently emeritus) Johan Gullichsen of Helsinki University of Technology in order to encourage especially young engineers andscientists. The 5th colloquium featured “Raw materials and processes ― viewpoint of product” and covered a wide range of topics including 5
categories and 8 aural presentations from all over the world. The summary of those presentations are reported.

Report of Studying at University of Maine
Kenji Hirai
Research and Development Dept., Product Development Research Lab.
Nippon Paper Industries Co., Ltd.
The author had an opportunity to study at University of Maine for one academic year of 2004. The author has belonged to Paper Surface
Science Program (PSSP) in chemical engineering department of University of Maine as a visiting scientist. In this report, mission and current
research activities of PSSP, the impression of the studying and the life at University of Maine are reviewed.
Keywords: University of Maine, Paper Surface Science Program, PSSP, Visiting scientist

Reduction of AOX by Prolonged ClO2 Bleaching under High Temperature and Acidic pH Conditions
Kengo Magara, Tsutomu Ikeda, Tomoko Sugimoto and Shuji Hosoya
Department of Chemical Utilization, Forestry and Forest Products Research InstituteDecreases in AOX during chlorine dioxide bleaching at high temperatures and under acidic conditions were investigated. When thetemperature in the chlorine dioxide bleaching stage was raised from 70oC to 95oC, a certain decrease in AOX was detected. AOX is formed bya chlorine substitution reaction with mainly lignin and chlorine that was generated from a reduction of chlorine dioxide. For the chlorination oflignin, it appears that raising the temperature facilitated an oxidation reaction rather than a substitution reaction, so that the rapid consumptionof chlorine in the oxidation reaction suppressed the substitution reaction.

Extension of the bleaching period from 15 min to 90 min also decreased AOX discharge. In the ﬁrst chlorine dioxide stage in bleaching, hightemperature and acidic pH were employed to hydrolyze hexeneuronic acid as well as remove lignin. In this bleaching condition, some of thelignin was also subjected to hydrolysis. However, the cause of a dehalogenation reaction that was required to decrease AOX is difficult tounderstand. To determine the cause of dehalogenation, some chlorinated compounds such as a chlorinated aromatic compound and achlorinated organic acid were heated at 95oC for 90 -120 min under acidic conditions. However, no explanation could be found to account forthe decrease in AOX. Therefore, further investigation should be conducted to determine why the AOX reduction was induced by prolonging thebleaching period.
Keywords: chlorine dioxide bleaching, AOX, high temperature, acidic pH, bleaching period

2006年6月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL June 2006

Vol.60 No.6 CONTENTS

Energy Saving

II

Results of the Fy2005follow up to JPA's Voluntary Action Plan and Report of Energy

Kunihiko Aida…(1)―Situation in the Pulp and Paper Industry in Japan―
Reducing Distribution Loss by Control of Reactive PowerTomoyuki Hosaka…(16)HITACHI High―Voltage Motor Drive Energy Conservation Service―New Business Model「HDRIVE」

Takashi Yabutani…(22)Operational Experience of the Recycle Boiler

Sadayuki Kawamura…(30)Energy Saving on Cold―water Equipment of Chlorine Dioxide Generation System（R8）Hirobumi Hamamoto…(36)Energy Saving at the Power Plant

Yoshiyuki Nagao…(41)Topics & Information
Technical Trend of Mechanical Seals for Pulp & Paper Plants

Hidekazu Takahashi…(46)―The Cartridge Outside Mounted Mechanical Seal―Eﬃcient Mixing of Papermaking Chemicals with TrumpJet™ System

Jouni Matula and Akira Ejima…(53)―Without Any Fresh Water―
Energy Saving for Reﬁner

Kazuo Aoshima…(61)―The Latest Reﬁning Technology for Saving Energy―
Operational Results of Neutral Deinking for Old Newsprint and Potential Application in
Asia―Paciﬁc Recycle MillsJim Merza, R. Daniel Haynes, Johan Allen, Christine Chezick, Jamie McMullen, Myra Fong, Kozo Ibara and Yoshikazu Sonehara…(72)
New Concept, High Eﬃciency Turbo Blower

Hiroyuki Hosoya and Naoki Tani…(82)Treatment of Waste Water from a Paper Manufactory by Magnetic Separation―Production of Reused Water―
Koushi Fukunishi, Hiroshi Ida and Yoshiyuki Kakihara…(86)A Report on International Symposium on Wood Science and Technologies2005
Introduction of Research Laboratories

Takayuki Okayama and Shigenori Kuga…(93)(53)

Structural Biopolymer Lab, Department of Biomaterials Science, Graduate School of Agriculturaland Life Sciences, The University of Tokyo…(98)

Research Report
Study on the Water Retention of Coating Color by Sandas Method（Pressurized Filtration）
Suggests that Using a Filter of0.4m Pore Size is More Reliable to Predict Performance ofColor in Coating Operation and Resultant Product Quality
Pulp and Paper Mills in Japan

Yuichi Shiba…(101)(58)―Kawanoe Mill, Daio paper Corp.―
Committee report

Daio paper Corp.…(112)…(03)

Essay on Intellectual Property…(97)

Coffee break…(100)

Papyrus…(116)

Industry News(Domestic and International)…(120)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(134)

List of Patents issued and Laid―open Publication…(137)

Price list of Domestic Logs and Wood Chips by District…(143)

Wholesale Price list of Papers at Tokyo Trade Center…(144)

Other Monthly Statistics…(146)

News from the Association…(148)

2006年6月

紙パ技協誌[プリント用ページ]
Results of the Fy 2005 follow-up to JPA's Voluntary Action Plan and Report of Energy Situation in the Pulp and Paper Industry in Japan
Kunihiko Aida
Japan Paper Association
The Japan Paper Association (JPA) has been actively working to save energy since 1997 when it established its "Voluntary Action Plan on
Environmental Issues". JPA declared its policy of restraining CO2 emissions as one of the actions: By 2010, reduce fossil energy consumption
per product unit for paper products by 13% from that of 1990 level.
Since FY1990, JPA has been following through on the actual results of the unit of energy in the year, and has been publishing its resultscompared with that in 1990. The following are the results for FY2004 and reports of energy situation in the pulp and paper industry in Japan.
The survey also reported on energy consumption, CO2 emissions and the position of the pulp and paper industry in Japan as related
information.

Reducing Distribution Loss by Control of Reactive PowerTomoyuki Hosaka
Electric and Instrument Department, Yufutsu Mill, Nippon Paper Industries Co., Ltd.
Useless energy has been consumed by the ineﬃciency operation of the departure supply of power distribution equipment in the Yufutsu Mill.
The chance to aim the inefficiency operation was to have discovered that receipt point was LEAD10%. Afterwards, No.1 Generator was
operating by the Power-Factor limitation control since the departure supply of power distribution flow was investigated, and it turned out thatthe outflow invalidity Reactive-Power in the receipt point was a surplus. The operation of 100% or more comes to cause the losses such as thegenerators and transformers though operating it with Power-Factor 100% in the belt because of the Power-Factor discount system in daytime isan ideal in Power-Factor of the receipt point.
Therefore, the problem that the departure supply of power distribution equipment holds from an electric viewpoint is dug up, and it
introduces "Reducing distribution loss by control of Reactive Power" executed in November, 2005 in this announcement.

HITACHI High-Voltage Motor Drive Energy Conservation Service-New Business Model「HDRIVE」
Takashi Yabutani
Information & Control Systems Div. Hitachi, Ltd.
The industrial world in Japan including the pulp and paper has worked on conservation of energy for a long term after the oil crisis. As aresult, it almost comes to the region in the limit about energy conservation by past methods.
As for the user, the energy conservation was not enforceable because there was an economical restriction though the necessity wasrecognized. In such a circumstance. We inspired a new business model based on the user's needs.
As the mechanism of concrete service, the user is do not need an initial cost to introduce the inverter, and, as a result, pays the service fee
from a part ob the achieved advantage. It is a scheme to which our company bears a part of risk of the amount of conservation of energy that theuser owes. We named this scheme "HDRIVE(R)"
After it had applied for the patent, the number of the total service exceeded 50. This time, we would like to introduces the detail of HDRIVE.

Operational Experience of the Recycle Boiler
Sadayuki Kawamura
Hachinohe Mill, Mitsubishi Paper Mills Limited
The promotion of countermeasures for global environmental issues is one of the most important management strategies of Mitsubishi Paper
Mills, Ltd.

The Mitsubishi Paper Mills Environmental Charter lists "Reducing overall CO2 emissions" as the first item of it's action plan.

Before the end of fiscal 2005, our target is to reduce CO2 emissions by 20% of 1999 levels.

To meet this target we installed a waste boiler at the Hachinohe mill in July 2004.
wood and paper sludge.

Instead of burning fossil fuel, we used waste tires, waste

The operation of this waste boiler signiﬁcantly reduced CO2 emissions and energy consumption.

Energy Saving on Cold-water Equipment of Chlorine Dioxide Generation System (R8)
Hirobumi Hamamoto
Ebetsu Mill, Oji Specialty Paper Co., Ltd.
As the environmental issues on dioxin have drawn bigger attention recently in pulp & paper industry, we have been required to adopt the newbleaching method (ECF, TCF etc) which don't use chlorine.
At Ebetsu mill of OJI SPECIALTY PAPER, we converted the bleaching method into ECF in 2003. Simultaneously, chlorine dioxide
generation system was also renewed, altering main bleaching chemical from chlorine to chlorine dioxide.
In the process of generating chlorine dioxide, gas is generated ﬁrst, then transformed into liquid by being absorbed in cold water.
As the conventional steam ejector cooling system requires much energy to cool down the water, we have changed to "CHILLER and Thermosiphon system", the cold-medium and compressor system, making energy consumption less than before.

Energy Saving at the Power Plant
Yoshiyuki Nagao
Mishima Mill, Daio Paper Corporation
The power plant at Mishima Mill consists of 18 boilers and 14 turbines with a total rated output of 531 MW. It supplies all electricity used at
the mill and the surplus is sold to the market.
After the 1970s oil crisis, Daio Paper converted from heavy oil to coal. Since 1985 we have also made the power plant more eﬃcient byinstalling more boilers and turbines that create higher steam temperatures and operate at higher pressures. In addition, we have increased
utilization of recycled pulp, which has a low energy consumption rate. As a result, we accomplished a 12% reduction in fossil fuel energy
consumption, as measured tonnage of paper produced, in 2004 compared with that of 1990.
In a situation where we are striving to help prevent global warming, we set a voluntary target of a 20% reduction in carbon dioxide emission
per tonnage by 2010 compared with that of 1990. We are making further efforts in the area of energy saving and conversion of fuel to achievethat target and reduce our energy costs.
Details of energy saving procedures at Mishima Mill are discussed in the following section.

Technical Trend of Mechanical Seals for Pulp & Paper Plants- The Cartridge Outside Mounted Mechanical Seal Hidekazu Takahashi
EAGLE INDUSTRY Co., Ltd., Customer Service Dept.
A mechanical seal prevents or reduces outboard leakage of toxic chemicals and saves energy and resources. Therefore, it can be deemed as
one of the important environmental instruments that is directly and indirectly contributing environmental preservation. In a pulp & paper plant,
many numbers of varieties of pumps are utilized such as water pumps, pulp pumps and chemical pumps all through the production processes
from digesting to painting. In recent years, a mechanical seal has been selected as a standard sealing device for such pumps. Accordingly, easeof maintenance and foolproof design are getting of the essence. Anther interest is interchangeability that cuts down spare needs. A new outside
mounted cartridge seal having such features is presented.

Efficient Mixing of Papermaking Chemicals with TrumpJet™ System- Without Any Fresh Water Jouni Matula
Wetend Technologies Ltd.
Akira Ejima
Matsubo Corporation

A new innovation, developed TrumpJet™ Technology is used to inject papermaking chemicals efficiently into headbox stock. The mixing isgreatly improved and consumption of chemical is reduced. The injection liquid is circulated headbox stock or white water instead of fresh water.
Several installations operate with good results and improved quality of production.

Energy Saving for Refiner― The Latest Reﬁning Technology for Saving Energy ―Kazuo Aoshima
Aikawa iron Works Co., Ltd.
The saving energy is a worldwide request and one of the most important subjects in Pulp & Paper industry. This paper reports how to
improve energy saving for the existing refiner and the latest development for refiner, which is called as "ADC" Aikawa Double ConiFiner.

Operational Results of Neutral Deinking for Old Newsprint and Potential Application in Asia-Pacific Recycle MillsJim Merza, R. Daniel Haynes
Eka Chemicals Inc., USA
Johan Allen and Christine Chezick
Bowater Canadian Forest Products Inc.
Jamie McMullen
Tembec Paper Group, Pine Falls Operations
Myra Fong
Tembec - Spruce Falls Operations
Kozo Ibara and Yoshikazu Sonehara
Eka Chemicals K.K.
Earlier work has shown the success of a 10 day sulphite based neutral deinking trial. The neutral deinking process has now been successfully
introduced into several recycle mills. Evaluation of free ink content and Lab scale studies showing the potential of this technology for the AsiaPacific Region.
The objective of this paper is to document similarity and changes in plant operations by a survey of the recycle plant process and comparisonof mill data before and after conversion. The mill survey includes information on pH, brightness, ink impairing brightness measured by ERIC,
ink removal efficiency, water brightness of grey water, ash content, and solids loss at flotation. In addition, a review of each mill's operationalchanges in ERIC and ISO Brightness values is made after about 1 year of neutral deinking.
The results found all three mills able to match or to have a similar ERIC value after ﬂotation despite a higher ink fragmentation going intoflotation. Two of the three mills were able to reach or exceed their target brightness based on average mill data. The third mill averaged within
one point of the target brightness and had a lower final ERIC value. Based on these three mills it can be concluded that sulphite based neutral
pulper chemistry is able to operate continuously under the varied mill operating conditions typically experienced in the industry.

New Concept, High Efficiency Turbo Blower
Hiroyuki Hosoya and Naoki Tani
ITOCHU SANKI CORPORATION
Korean company, Kturbo Inc, has developed high eﬃciency Turbo Blower (TB) series. TB series are the perfect turbo blowers with semipermanent foil air bearings, high speed motor. They can save more than 30% of energy consumption compared with roots blowers. TB series
are oil-free and noise-free turbo blowers which are directly driven by permanent magnet high speed motors supported by hydrodynamic air foil
bearings. Direct drive of the rotating shaft without mechanical contact reduces the noise level up to 85dB@1m, and total product weight andvolume by 1/3 and eliminates the construction of

basement for vibration isolation.

Kturbo blowers can be used for waste water treatment, conveying system of cement factory, process air supply for paper and ﬁber factories,
etc. In particular, they are the best solution for food/beverage and cement factories which need perfectly clean air.

Treatment of Waste Water from a Paper Manufactory by Magnetic Separation-Production of Reused WaterKoushi Fukunishi, Hiroshi Ida and Yoshiyuki Kakihara
MS Engineerings (Futaba Shouji Co., Ohsaka Chemical Izuo Labo.)
Puriﬁcation of waste water from a paper factory was attempted by super-conductive high gradient magnetic separation (HGMS) in a pilotplant scale of 2000 ton a day. The plant of 2000 ton/day drainage consists of three main tanks, ie., a reaction tank, a separation tank(thickener), and a magnetic-separation tank. In the reaction tank suspended and resolved substances in waste water were magnetized withmagnetite particles and aluminum sulfate as coagulant (magnetic seeding). The resulting heavy magnetic flock precipitated smoothly in theseparation tank and the remained magnetic flocks were captured by magnetic filters in the magnetic-separation tank.
The original COD (Mn) values (chemical oxygen demand) of waste water from a paper mill were in the range of 60〜200 mg/L. The COD
values reduced to 30〜60mg/L by the sedimentation process and by the following magnetic-separation process. Their transparency was also
raised prominently (turbidity=5〜10 NTU).
In the magnetic-separation part, a super-conductive magnet of 3 Tesla was set, and a ﬁlter container with 400mm-bore in diameter was ﬁlledwith magnetic filters. Floating magnetic flocks were trapped at the magnetic filters in high efficiency of more than 98%. An exchange and awashing system of the mud filters were developed by building up a continuous push out system. A production test of 2000 ton a day gave
reasonable results with a continuous automatic operation.

A Report on International Symposium on Wood Science and Technologies 2005
Takayuki Okayama
Tokyo University of Agriculture and Technology
Shigenori Kuga
The University of Tokyo

International Symposium on Wood Science and Technologies (IAWPS2005) was held in Yokohama on November 27-30, 2005 under coorganization of The Japan Wood Research Society (JWRS) and The International Association of Wood Products Societies (IAWPS). Total
participants were more than 500 including 149 from outside of Japan. 395 papers including 4 plenary lectures, 163 oral presentations and 228
poster presentations were presented at 10 sessions. 33 papers including 12 oral presentations dealt with pulp and paper science and technology.

Study on the Water Retention of Coating Color by Sandas Method (Pressurized Filtration) Suggests that Using a Filter of 0.4m Pore Size isMore Reliable to Predict Performance of Color in Coating Operation and Resultant Product Quality
Yuichi Shiba
Corporate Research Center, Mitsubishi Paper Mills Limited
AA-GWR water retention meter is a very popular and useful test method for water reduction of pigment slurries. It is based on pressure
filtration of coating colors under an air pressure and suitable for estimating a penetration phenomenon of a water phase from a coating color
into a base paper under a practical coating process. In this study various plastic filters with specific pore sizes (5.0 to 0.05 m) were used for
filtration of colors on AA-GWR. The dewatering amount of the colors was compared to the runnability of the color on a pilot blade coater.
Some factors such as finer pigments and nonionic materials made an amount of filtrated materials increase much. And the reasonable
correlativity between the runnability of coater and the dewatering amount was spoiled. The unreasonable water retention values on 5.0 m poresize filter were found on the evaluation of specific coating colors which contained nonionic water soluble binders such as Polyvinylalcohol(PVA) and Hydroxyethyl starch (HES) and finer pigments of TiO2 and CaCO3. These materials were not trapped by the filter and reached thetest paper. However it was found that the 0.4m pore size filter was possible to be used to measure reasonable penetration of water phase of suchcolors and to estimate the runnability on a coater. Additionally water retention values measured by 5.0 and 0.4 m for common coating colors
were almost the same.
Keywords: AA-GWR, water retention, coating color, blade coater, filtration

2006年7月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL July 2006

Vol.60 No.7 CONTENTS

Pulp
World Market Pulp Supply/Demand & Chinese Recovered Paper
Minoru Arai, Takayuki Noma and Nobuyuki Ihara…(3)Recycling Potentials of Kraft Pulps Prepared from Planted Eucalypt and Acacia Woods
Operating Experience of Kraft Pulp Mill"Plantation―grown Eucalyptus"

Takayuki Okayama…(7)Alexandre Lanna and Toshiharu Yatomi…(12)Latest Recycling and Upgrading Technology of Low Grade of Raw Material in Stock Preparation
Masakazu Eguchi…(19)Required Technologies for Expansion of Use of Low Grade Furnish

Takeshi Kanazawa…(25)Stickies Control Agent for Recycling Paper by OPTIMYZE

Motoaki Kimura…(35)Recent Large Aker Kvaerner Pulp Mill Projects

Sevn―Erik Olsson and Tomoyuki Tezuka…(42)The Latest Andritz Chemical Fiberlines, Mechanical Pulping Systems and Recycled Fiber
Processes Delivered in China and South America
Kanji Hagiwara, Yosuke Takeshita and Tamio Fukuzawa…(50)
Utilization of Used Paper Cores and Tubes on Manufacturing Corrugating Medium
Inﬂuences to the Operation of Bleached Hardwood Kraft Pulp by the Increase of Plantation

Takefumi Nakanishi…(57)Kazuhiko Ando…(62)Wood Chips
The Operating Experiences Using Low Bulk Wood Chips
The Inﬂuence for Operational Factors by the Diversiﬁcation of the Wood Species
The Relationship between the Character of Plantation Wood Chips and Pulp Properties
Reports of

92nd PAPTEC Annual Meeting

Ryuuichi Suzumi…(68)
Tamotsu Morikoshi…(73)
Yosuke Uchida…(80)Takanori Miyanishi…(84)Research Report
Evaluation of Water Based Gravure Ink Penetration into Coated Papers by ESCA

Yasushi Ozaki and Michiharu Uchida…(91)Pulp and Paper Mills in Japan (59)―Gifu Area, Tokushu Paper Mfg, Co., Ltd.―
Committee report

Tokushu Paper Mfg, Co., Ltd.…(100)…(03)

Coffee break…(90)

Papyrus…(105)

Industry News(Domestic and International)…(108)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(120)

List of Patents issued and Laid―open Publication…(122)

Price list of Domestic Logs and Wood Chips by District…(135)

Wholesale Price list of Papers at Tokyo Trade Center…(136)

Other Monthly Statistics…(138)

News from the Association…(140)

2006年7月

紙パ技協誌[プリント用ページ]
World Market Pulp Supply/Demand & Chinese Recovered Paper
Minoru Arai and Takayuki Noma
Pulp Dept., Marubeni Corporation
Nobuyuki Ihara
Marubeni Paper Recycle Co., Ltd.

Recently the circumstances surrounding pulp suppliers have been dramatically changing in terms of energy cost, exchange rate, wood chipand so on. Looking at the supply side, we would see rapid expansion of hardwood pulp mainly in South America. World hardwood supply willturn out to be more than softwood supply. As for the demand side, China is considered to remain the big market for market pulp. Considering
about production cost for pulp suppliers, they have been suffering from sharp rise of raw materials and fuel, currency appreciation against US
dollar, which reduce their profits obviously. It is reported that lots of Canadian pulp suppliers had to shut down their mills this year.
The demand of recovered paper from Chinese paper mills has been increasing dramatically, and it has given big inﬂuence on Japanese market
as China is major export market for Japan. China has further expansion plans for paper and paperboard and will consume more recovered
paper. In order to secure the materials, China need to collect more recovered paper from the domestic market.

Recycling Potentials of Kraft Pulps Prepared from Planted Eucalypt and Acacia Woods
Takayuki Okayama
Division of Ecosciences, Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology
When a kraft pulp is repeatedly wetted in water and dried for several times, the strength properties of handsheets are considerably
deteriorated. The repeated wetting and drying of a recycling process affects the microstructure of the pulp fibers. The shrinkage of internal pore
structure under recycling was not easily reversed.
Thirty-three 9-year-old fast-growing individual trees of Eucalyptus globulus planted in Australia were examined to investigate variations in
pulp fiber and handsheet properties during recycling. Large between-tree variations in the thirty-three individual tree pulps were observed intensile strength of handsheet during recycling. The fiber wall thickness and the Runkel ratio well reflected the shrinkage configuration of thepulp fibers during recycling.
Tensile indices at expected recycling were calculated by nonlinear regression analysis for each pulp. Expected tensile index of handsheet at
extended recycling were closely related to the sheet density after five recycles, the fiber swelling of original pulp and fiber morphologicalcharacteristics.
Three species of 11-year-old fast growing Acacia woods, namely Acacia mangium, Acacia auriculiformis and Acacia mangium x Acacia
auriculiformis (hybrid), planted in Malaysia were also examined to investigate variations in handsheet properties during recycling.
Variations in tensile strength of handsheet of the hybrid during recycling were similar to those of Acacia mangium. On the other hand,
handsheet from Acacia auriculiformis had lower tensile strengths during recycling than other two species. The hybrid showed higher expected
tensile indices, compared with other two species.
Keyword: recycling, Eucalyptus globulus, Acacia mangium, hybrid, fiber characteristics, paper
strength, nonlinear regression

Operating Experience of Kraft Pulp Mill
"Plantation-grown Eucalyptus"
Toshiharu Yatomi
Technical and Industrial Department, CENIBRA
Alexandre Lanna
Production, CENIBRA
Cenibra (Celulose Nipo-Brasileira S.A.) is one of the largest producers of short-ﬁber bleached Eucalyptus pulp. The company was founded
on September 1973. In July 2001, Japanese company, "JBP" became the only shareholder of Cenibra.

Cenibra's total area is 234,827ha, splitter in cultivated lands 123,398 ha with E. Grandis, E. Urograndis (hybrids E. Urophylla and E. grandis)and preservation and legal reserve 92,087 ha. The existing production capacity is 940,000 ADt with an expansion project for 200,000 ADt upgrade schedule to be start-up in early 2007.
The increase of production and quality stability needs as a continuous target, create a demand for wood segregation. Many parameters andalternative methods has been tried to improve process control.
In this paper,the outline of Cenibra is introduced and mil operating experience of pulp processes is reported.

Latest Recycling and Upgrading Technology of Low Grade of Raw Material in Stock Preparation
Masakazu Eguchi
Stock Preparation Dept. of Engineering and Development Div.
Voith IHI Paper Technology Co., Ltd.
Characteristics of raw materials in waste paper recycling system for paper making are changing to lower quality in the world according torecent higher recycling rate of waste paper, progress of printing technology, more usage of Eucalyptus and acacia pulp and shifting to planted
wood from natural resources for pulping material.
Therefore, more innovated and appropriated stock preparation technologies are requested to treat such low grade of raw materials and to
improve property of the paper and also runnability of the paper machine.
We, Voith IHI Paper Technology (VIPT), will state and introduce the current raw material condition in the world and VIPT's latest stock
preparation technology for solution of your existing system and planning of your new project.

Required Technologies for Expansion of Use of Low Grade Furnish
Takeshi Kanazawa
Aikawa Iron Works Co., Ltd.
The use of the low grade furnish has been needed with the rise of the waste paper availability in the world. However, the low grade furnish
contains a lot of various foreign materials and various printed matters with hard-to-remove-ink. This paper reports the technical questions andmeasures regarding the expansion of the use of such low grade furnish as the stock of paper and paper-board.

Stickies Control Agent for Recycling Paper by OPTIMYZE
Motoaki Kimura
Buckman Laboratories K.K.
As the demand for recovered ﬁber rises, the quality inevitably deteriorates. Recycled paper systems contain deposits called stickies that arecomposed of adhesives and other organic contaminants. These stickies can produce an off-quality product, an interruption of paper production,and increased landfill costs and buildup of waste materials. We have found a way to save our customers these production and end-productheadaches and we can do it with chemistries that are environmentally neutral as well as safer for workers.
The Optimyze Stickies Control family of products are based in part upon newly engineered, patented enzymes. The Optimyze products are
specially formulated, using patented stabilization technology, for use in furnishes composed of mixed office waste, old newspapers, and oldcorrugated containerboard. Their specific chemistry has been developed to break up and detackify stickies particles and thus decrease theamount of contaminants that can be deposited in recycle furnishes.
Optimyze is a unique enzyme technology that replaces more hazardous chemistries and facilitates the use of recycled papers, which received
Presidential Green Chemistry Challenge Award from United States Environmental Protection Agency's (EPA) in 2004.

Recent Large Aker Kvaerner Pulp Mill Projects
Sevn-Erik Olsson
Kvaerner Pulping AB
Tomoyuki Tezuka
Kvaerner Pulping KK

There is a clear trend in today's pulping industry. New facilities are mainly built in Asia and South America, where access to fast growing raw
material and other production factors give favorable level of costs. Operations in the rest of the world mainly focus on modernizations ofexisting equipment and mills. This development also reflects Aker Kvaerner's operations over the recent years.
In this paper, the "giant ﬁberlines" especially for Asia and South America will be focused on.

The Latest Andritz Chemical Fiberlines, Mechanical Pulping Systems and Recycled Fiber Processes Delivered in China and South America
Kanji Hagiwara, Yosuke Takeshita and Tamio Fukuzawa
Andritz K.K., Japan
Andritz has delivered quite a number of pulping systems in South America since 2000 and also has delivered many Mechanical pulping
systems and Recycled Fiber (DIP) Processes in China over the last 10 years. The latest Andritz technology for the chemical fiberline consists of
the DFLS Lo-Solids™ Cooking technology and the Fractional washing DD Washers throughout the brown stock washing and ECF bleachingprovided with Ahlstage™ acid treatment process. The latest Andritz mechanical pulping technology encompasses the PRC-APMPTM Process
and RTSTM-TMP refining of energy saving. These processes have been successfully operated since the start-ups and the customer mills havebeen satisfied with the performances.
This paper introduces brieﬂy the advantages and performances of the processes that Andritz has delivered in China and South America.
Keywords: DFLS (Down Flow Lo-Solids™) Cooking, TurboFeed™ System, Fractional washing
DD Washers, PRC-APMP™, RTSTM-TMP, Ahlstage™

Utilization of Used Paper Cores and Tubes on Manufacturing Corrugating Medium
Takefumi Nakanishi
Production Department, Kanazu Mill, Rengo Co., Ltd.

Rising demands for environmental protection and resource conservation in the recent years have accelerated the creation of a recyclingoriented society, steadily increasing the Japanese waste paper utilization rate to 60% in 2003. Meanwhile, demands of variety functional papers
with enhanced moisture resistance have grown as they offer greater convenience to consumers. These functional papers containing used paper
cores and tubes raise serious issues to the paper industries as ordinary equipments at mills can not utilize them as regular waste paper. Also,
functional papers consume a large amount of electricity at pulping process and most of them are disposed of as industrial waste. The use of suchhard-to-recycle waste paper, however, is an issue that must be solved as society expects increased waste paper utilization rate in the future.
Rengo Kanazu mill started its operation in 1961 and currently has two corrugating medium machines. In order to promote waste paper
utilization, the mill has been using 100% wastepaper since 1993 for manufacturing of corrugating medium. In order to meet current
requirement to utilize hard-to-recycle waste paper, the mill installed a new processing facility for used paper cores and tubes in 2004.
The new facility does not require additional chemicals or heat. Used paper cores and tubes are put into the new facility in ʻas is' condition andthe output is sent to the regular pulper, and is treated in the same process as regular waste paper.
The final products manufactured in the stated conditions were examined and they showed no negative effects on both table test and realmachine test. It is concluded that the facility can be operated without any problems.

Influences to the Operation of Bleached Hardwood Kraft Pulp by the Increase of Plantation Wood Chips
Kazuhiko Ando
Pulp Production Dep., Ishinomaki Mill, Nippon Paper Industries Co., Ltd.
Recently, in order to reduce the green house gas the plantation is getting increased in all over the world. And also there is growing tendency
toward to conservation of natural forest and wildlife. Therefore the percentage of plantation wood chip supply is getting increased at typicalJapanese kraft pulp mills. The tendency like this will be accelerated in the nearly future. To correspond to the change of wood chip property is
one of important missions for the pulp & paper industry. Therefore the industry is needed to operate with various ideas.

Ishinomaki LBKP plant produces Bleached Hardwood Kraft Pulp. The digester runs on the conventional cooking and the bleaching sequence
is D-Eop-D. The process flow is quite typical form. On the experience of Ishinomaki LBKP plant, it is found out that the plantation wood chips
bring on the lower cooking & bleaching cost but the worse plugging in a 2ndary knotter and worse vacuum on bleach filters than the natural
wood chips. The plant installed the optimized procedure of wood chip mixing and some operational ideas as the measures.
Including them, this report introduces some influences by the increase of plantation wood chips and some measures for them at Ishinomaki
LBKP plant.
Keywords: Plantation chips, Vacuum filter drainage issue, Scaling issue

The Operating Experiences Using Low Bulk Wood Chips
Ryuuichi Suzumi
Niigata Mill, Hokuetsu Paper Mills, Ltd.
Hokuetsu Paper Niigata Mill produces ECF bleaching kraft pulp via two ﬁber manufacturing lines that started up in 1989, and the another in
1998. The 95% of total purchased woodchips are cultivated and the remains are from domestic natural forest. The higher forested chip ratio
takes great advantages of pulp yields, black liquor yields and chemical consumption. On the other hand, an unstable digesting operation may
come out that is caused by the low bulk planted woodchips.
In this paper, the key points of the continuous digesting operation under using low bulk woodchips are reported.

The Influence for Operational Factors by the Diversification of the Wood Species
Tamotsu Morikoshi
Sendai Mill, Chuetsu Pulp and Paper Co., Ltd.
The change in operational factors due to the increase in ratio of imported wood chips and diversiﬁcation of wood species by aﬀorestation, hasrecently become a problem. It is thought that in the future as diversification of wood species advances, there is a possibility of it becoming
difficult to continue to stabilize operation.
The decline of the bulk speciﬁc gravity of the hardwood chip and changed bleach-ability of the chip combination aggravates productivity at
Sendai Mill. In addition to the pitch trouble often experienced due to chip combination the pitch trouble with the NBKP/LBKP switch
operation has especially become a serious problem. This report shows the influence of the change in chip combination of hardwood or softwoodon the operation, and operational experience in the production of bamboo pulp, which recently has been tackled.

The Relationship between the Character of Plantation Wood Chips and Pulp Properties
Yosuke Uchida
Research Development Div. Pulp & Paper Research Laboratory, Oji Paper Co., Ltd.

The relationship between the character (morphology, chemical composition) of plantation wood chips (E. globlus, E. nitens, E. grandis, E.
camaldlensis, E. exerta, A. mangium, A. auriculiformis, A. hybrid (A. mangium×A. auriculiformis)) and pulp properties was investigated. The
results showed that fiber morphology in wood chips has a great influence on sheet properties, and that the lower lignin content in wood chips
gives less energy for pulping and higher pulp yield. However, there were some exceptions to relationship between pulping efficiency and lignin
content. In order to evaluate pulp properties of new wood chips, it is necessary to make pulping tests and measure the fiber morphology.

Reports of 92nd PAPTEC Annual Meeting
Takanori Miyanishi
Longview Office of Nippon Paper Industries and North Pacific Paper Corporation

Canada is the largest forest products exporting nation in the world. All this resulted in 92nd PAPTEC Annual Meeting in Montreal during
February 6th-9th, 2006 that brought together hundreds of people working to support the industry and to revitalize it as it emerges from thechallenges that have recently beset it. The Standing Committees sponsored 42 sessions featuring 249 technical presentations on a wide range ofsubjects. The comprehensive program attracted the largest audience in the past three years with a total of 947 delegates. Several papers in thefields of mechanical pulping, bleaching, paper chemistry and papermaking are introduced in this article.

Evaluation of Water Based Gravure Ink Penetration into Coated Papers by ESCA
Yasushi Ozaki and Michiharu Uchida
Research Institute, National Printing Bureau
Ink absorption on coated paper was investigated using ESCA. The relative intensities (Cu2p/C1s) and (Si2p/C1s) were measured by ESCA.
The relative intensities (Si2p/C1s) were shown as the rate at which coated paper was covered with ink while the relative intensities (Cu2p/C1s)
were shown as the exposure ratio of ink pigments. The relative intensity (Si2p/C1s) decreased with the increase of ink transferred area andleveled out at the lowest value. The region of leveling off indicated that ink almost covered the coated paper. The relative intensities(Cu2p/C1s) in this region were approximately regarded as the exposure ratio of ink pigments to ink vehicle.
The intensity (Cu2p/C1s) of the printed samples on coated layers with high micro-pore volume was high. The exposure ratio of ink pigments
on gravure prints of the coated paper was correlated with liquid absorption into the same paper by Bristow method.
The penetration of water based gravure ink on coated papers could be estimated from the relative intensity (Cu2p/C1s) by ESCA. This
technique was directly adapted to the gravure prints.
Keyword: gravure ink, ESCA, liquid absorption, Bristow method

2006年8月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL August 2006

Vol.60 No.8 CONTENTS

Topics & Information
Successful Press Section Management by Means of EnviroScan™ and FeltView™ Measurement
Hideomi Uchikawa and Reinhard Mullar…(1)The Field Performance of MJ Former for Packaging Grade
Akihito Nagano and Kazuhiko Masuda…(8)Operating Experience of Headbox with Dilution Control System

Satoru Nakazato…(15)Development and Operational Suitability Test―Result of High Eﬃciency Washer「Zekoo」
Saeko Akiyama, Takefumi Ide and Kiyoshi Yoda…(19)Equipment and Methods for Reliability―based Maintenance Strategies in the Paper Industry
Oliver Massa…(25)Total Wet―end System with Reduced Alum Dosage for Linerboard

Takao Sezaki and Yasuhide Yoshimoto…(29)Reduction in Eﬄuent Load by Proper Wet―end Chemistry
Koichi Tadaki, Tomoko Asada, Miho Kato and Shigeru Kurose…(38)Density Decreaser for Paper―MUSCUT Series―
Yuichi Tomoda, Takashi Tanaka and Youichi Mukougawa…(47)
Data Management of"SmartView○R"Inspection System

Atsushi Kurosaki…(53)Eﬀects of Pigments Shape on Paper Properties―II

Etsuya Misawa and Rajan R. Iyer…(59)Inﬂuence of Diﬀused Light on Visual Perception of Print Gross in Coated Paper
Takeshi Watanabe, Nobuhiro Matsuda and Hisashi Matsui…(66)Express Moisture CD and MD

Reijiro Nakano and Mikio Kojima…(73)

For Achievement of Environmental Standard in Gulf of Toyama

Hirokazu Kondo…(79)―Reduction of Nitrogen/Phosphorus in Drainage―
IntroductionofResearch

Laboratories (54)Laboratory of Chemistry and Biotechnology for Utilization of Forest Resources,…(84)

Department of Applied Bioscience, Faculty of Agriculture, Ehime University
Research Report
Eﬀect of External Fibrillation on the Retention of Filler

Taegeun Kang and Hannu Paulapuro…(88)Pulp and Paper Mills in Japan(60)―Fuji Mill, Nippon Paper Industries, Co., Ltd.―
59th JAPAN TAPPI

GeneralMeeting

NipponPaper Industries, Co., Ltd.…(95)…(104)

Committee report…(03)

Essay on Intellectual Property…(86)

Coffee break…(87)

Papyrus…(127)

Industry News(Domestic and International)…(133)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(146)

List of Patents issued and Laid―open Publication…(148)

Price list of Domestic Logs and Wood Chips by District…(161)

Wholesale Price list of Papers at Tokyo Trade Center…(162)

Other Monthly Statistics…(164)

News from the Association…(166)

2006年8月

紙パ技協誌[プリント用ページ]
Successful Press Section Management by Means of EnviroScan™ and FeltView™ Measurement
Hideomi Uchikawa
Voith Paper Automation Japan Ltd.
Reinhard Mullar
Voith Paper Automation GmbH & Co. KG
Some years ago a one-nip press concept appeared to be a vision that was out of reach. As a press concept like this provides obvious beneﬁts topapermakers. Both woodfree and woodcontaining papers have their own individual dewatering behavior during pressing. Finally, it turned outthat woodfree paper grades reach a sufficient dryness level after one nip only.
This paper describes the press conﬁguration, the successful press section management by means of EnviroScan™ and FeltView™, and thelayout data of the commercial reference machine. EnviroScan™ is a single beam compact scanner with moisture and sheet temperature
measurements embedded inside the scanner frame as special designed. The scanner and the embedded both moisture and sheet temperature
measurement are fully protected from the severe environment. FeltView™ is a press felt optimization system provides scanning measurement ofwater weight, permeability and surface temperature for up to four press felts. Both EnviroScan™ and FeltView™ should be standard for all
Single NipcoFlex Press.

The Field Performance of MJ Former for Packaging Grade
Akihito Nagano and Kazuhiko Masuda
Mitsubishi Heavy Industries, LTD.
The features and performance of "MJ Former", high speed roll former for packaging grade has been presented at 2004 Japan Tappi. The ﬁrst
installation has successfully started up in Germany one week ahead of schedule. This paper machine has already reached design speed on brown
grade. Paper qualities are excellent and achieved the target.
This paper presents the project outline and performance of paper machine high lighting "MJ Former".

Operating Experience of Headbox with Dilution Control System
Satoru Nakazato
Saga Mill, Oji Paperboard Co., Ltd.
In 1985, a 5-layer Highspeed Ultra Former was introduced to PM5 in Saga Mill of Oji Paperboard Co., Ltd. Along with the speed-up of themachine, the flow rate through the headboxes increased and exceeded the design rate, resulting in bad BD profiles and exposure of the ridge
problems (oil drum-like wrinkles). To solve them, the headboxes have been replaced systematically since 1997 and a micro-rod BD profilingsystem was brought in 2002. Then, we installed a Dilution Control System as a final stage.
The installation of the Dilution Control System has provided the improvement of the BD and caliper proﬁle by up to 48% and 25%,
respectively. In addition, the down-time for grade change and start-up has been cut by 2.4 minute and 3.8 minute on an average, respectively.
The outline, the operating experience, and the advantage of the headboxes with the Dilution Control System introduced to the PM5 aresummarized in this report.

Development and Operational Suitability Test-Result of High Eﬃciency Washer 「Zekoo」
Saeko Akiyama, Takefumi Ide and Kiyoshi Yoda
TAIZEN Co., LTD.

In the Paper Industry, the need for Waste Papers has been increasing more and more. In the process technology for Waste Papers, thepulping process by the kneading method, which is our specialty, has been main current and so the quality of Waste-Pulps is very improved now.
Then we have aimed ata High concentration Washer to gain the more high quality of Waste Pulps. After many times of the trial and error,

we have finally developed our vertical washer with separator, which is "Zekoo"This "Zekoo" is capable of high−grade washing for Waste Pulps by our original mechanisms, which are the centrifugal dehydration, thekneading action , the turbulence and the efficient replacement of washing water by fresh water. And the vertical structure of Zekoo enables it tosave the installation place and fresh water usages. And this "Zekoo" is designed to be applicable to wide concentrations of pulps and to be
simple in the operations and the maintenances.
In the actual running of Zekoo, some potentials like as high grade rejection capacity of carbons and ashes and recovery capacity of ﬁbers aredemonstrated.
Now we present this epoch-making washer "Zekoo" to the Paper Industry, in which the need for the Waste Papers is increasing more andmore in the future.

Equipment and Methods for Reliability-based Maintenance Strategies in the Paper Industry
Oliver Massa
F'IS Paper & Steel, FAG Industrial Service GmbH
Aimed availability of more than 95% in the paper industry does not allows any unscheduled shutdowns. This necessitates the employment ofsuitable inspections, measurements and monitoring in order to be able to reliably assess the condition of the equipment and detect damage tomachinery early on. With online, a minimal damage or condition changes can be detected at a very early stage in comparison to offline.
Online condition monitoring allows a fast reaction time to plan the maintenance activities and guarantee highest reliability, but only with aconsequent root cause analysis and counter measure, downtime can be reduced substantially.

Total Wet-end System with Reduced Alum Dosage for Linerboard
Takao Sezaki and Yasuhide Yoshimoto
Paper Chemicals Division, Harima Chemicals, Inc.
In papermaking industry, operating conditions are changing rapidly in order to cope with a rise in worldwide environmental awareness andunavoidable rationalization aiming to improve the profitability. In linerboard, the amount of calcium carbonate that contaminates the wet-end
process tends to increase due to an increase in the recycling ratio of magazine. Consequently, such contamination could lead to the problem offrequent trouble by heavy gypsum scale and reduction in performance of wet-end additives because of the raised conductivity.
Under these situations, reduction of alum is expected to bring a lot of merits in linerboard production. On the other hand, some demerits
would also arise from it. The application of "Total Wet-end System" is able to not only get rid of these demerits but also improve the quality oflinerboard. We introduce the "Total Wet-end System" with reduced alum dosage, which can offer a solution to the difficulties including thecontribution to the environmental protection, quality improvement, and increase of the productivity in linerboard.

Reduction in Effluent Load by Proper Wet-end Chemistry
Koichi Tadaki, Tomoko Asada, Miho Kato and Shigeru Kurose
Chemicals for Pulp & Paper Technical Dept., Somar Corporation
In recent paper industry, global environmental protection is a big concern beside productivity, run ability and quality improvement. Increased
recycled fiber usage promoted by global resource protection and environmental concern brings more foreign materials such as pitch and anionictrash in papermaking system.
At Somar we have been working on wet-end improvement agent "REALIZER A Series" as functional coagulant which maximizes the eﬀect ofvariety of wet-end chemicals. Latest polymer technology help us to develop another functional retention aids as "REALIZER R Series" and"REXER FX Series" which are effective in fine and ash retention. Synergistic effect of the combination of these chemicals to improve wet-end
performance is referred as "AXISZ SYSTEM". In addition to these chemical developments, long experience in slime control technology inpapermaking process at Somar helps us to develop most effective biocide system "CURECIDE SYSTEM". The optimum wet-end control system
could be built though the use of our chemical system which gives maximum effect with minimum chemical dosage. Possible reduction in many
wet-end chemicals contributes lowering effluent load as well.
This paper describes the eﬀect of reduction in eﬄuent load by optimizing wet-end operation using "AXISZ SYSTEM" and "CURECIDESYSTEM".

Density Decreaser for Paper- MUSCUT Series Yuichi Tomoda, Takashi Tanaka and Youichi Mukougawa
Paper & Pulp Group, Specialty Chemical R&D Department
Research & Development Division, NICCA CHEMICAL CO., LTD.
Recently, "kasadaka-shi", that is high-bulky paper or low-density paper, has been widely used for book paper and paperboard. Low-density
paper is combined with chemicals, fillers or large amount of pulp that makes bulkiness of paper. NICCA CHEMICAL has led and developed acationic type density decreaser with sizing effect and entered the market with MUSCUT K-300. MUSCUT K-300 imparts not only bulkinessand sizing effect but also opacity, whiteness and softness for paper. Also, it shows less pitch trouble and less foaming on actual operation
because of its self- fixing ability. We have strained for cationic density decreaser system and have continued to study and develop. Emulsion
type products had been the mainstream in cationic type density decreasers. But we have developed a new solid cationic type named MUSCUTKF-2000. We would like to introduce its characteristics and applications.

Data Management of "SmartView®" Inspection System
Atsushi Kurosaki
Surface Inspection Systems Division, COGNEX K.K.
The Cognex SmartView® Inspection System provide historical and real-time inspection data to PC workstations on the mill-wide network,and to equipments (PLC, DCS, Plant Information System etc.) via OPC/ODBC. The SmartView® OPC Data Access software provides
increased flexibility in roll summary data collection, real-time defect data collection, and system status and event monitoring. The SmartView®
Data Archive with ODBC enables customers to access historical inspection results using customer-developed data analysis tools or Production
Quality Advisor (PQA). PQA is a powerful suite of data analysis and display tools for viewing both current and historical production quality
data from Data Archive Servers.

Effects of Pigments Shape on Paper Properties - II
Etsuya Misawa
IMERYS MINERALS JAPAN K.K.
Rajan R. Iyer
IMERYS Pigments for Paper Americas
It is well known that the ﬂat shape of kaolin particles contribute to paper/print gloss and opacity in coated paper.

Flatter particles give

improved coverage and smoother surface properties for coated paper. This leads to improved coating structure and results in better print gloss.
On the other hand, blocky ultrafine particles generally show advantage on sheet gloss.
Thus, the combination of ﬂatter and ﬁner particle is assumed to achieve both characteristics. However to measure a pigment's aspect ratio isa time consuming procedure, so there seems to be few detailed studies of the correlation between the aspect ratio and particle size and theaffect on coated paper properties.
This study aimed to research the eﬀect of the pigment's aspect ratio and particle size on coated paper properties in heavy coated paper inparticular, in order to understand the interactive mechanism of such unique characteristics.

Influence of Diffused Light on Visual Perception of Print Gross in Coated Paper
Takeshi Watanabe, Nobuhiro Matsuda and Hisashi Matsui
Polymer Research Laboratories, JSR Corporation
Recently, coated paper is required characteristics of visual perception components like print gloss, sheet gloss and brightness and so on. It is atrend in the differentiation of the coated paper quality to give the product these components. "Print Gloss" is especially an important final
quality of coated paper.
However, for the print gloss, as for ''the specular gloss'' measured with standard gloss meter and ''the visual perception of print gloss'' thatman feels in sense, all might be not the same, and be different.

In this study, we considered that the visual perception of print gloss was inﬂuenced by permeation, absorption and diﬀusion of light in the ink
layer (resins and ink pigments) and the coating layer (pigments and binders), in addition to ruggedness on printed surface, and investigatedclarification of the key factor and the quantification of the visual perception of print gloss with using goniophotometer and scanning white-lightinterferometer.
As a result, it was found that the roughness on the printed surface of 10μm or less inﬂuenced to the visual perception of print gloss,
furthermore the internal diffuse reflection light in the ink layer and the coating layer greatly influenced. And then the quantification of thevisual perception of print gloss was also able to be established, it reported with this paper.
Keywords: coated paper, visual perception of print gloss, goniophotometer, internal diffuse
reﬂection light

Express Moisture CD and MDNakano Reijiro
Sales Development Dept., Honeywell Japan Inc.
Mikio Kojima
Honeywell Process Solutions，Honeywell Japan Inc.
Most CD moisture proﬁling devices are controlled from proﬁles obtained at the reel or, in the case of ﬁne paper machines, possibly from thepre-size press scanner. In recent years, there is a continuing trend toward obtaining a flat moisture profile from the press section, and as aresult, some mills have installed moisture scanners following the press section to control the sheet moisture profile. The reasons for this include
the desire are to operate the press section in an even loading mode, to separate problems originating in the dryer section from those originatingin the press section and to produce a uniform CD sheet bulk out of the press section.
In terms of MD Moisture, water removal in the press section is relatively inexpensive compared to moisture removal using steam heateddryers. Removal of an additional 1% of moisture in the press section can decrease the steam requirements in the dryer section by 4%, making it
more economical to remove moisture mechanically than by evaporation. Methods for improving pressing moisture removal efficiency to reducethe moisture removal load on the dryer section are continually sought. So the actual moisture measurements in press would contribute to
optimize the press section.
The Fiber Optics Moisture Sensor provides both CD and MD accurate and reliable measurements in wet press and dryer section over a broad
range of paper grades, from tissue to heavy board, and of moisture levels, from bone dry sheets at the size press to high levels at the wet press.
New generation of moisture sensor consists of a light source, an optical fiber for delivering the radiation to the web, a monitoring optical fiber
and two detectors. The light source and all electric devices are located to outside of the machine, designed for maximum reliability, long
operating life, and minimized maintenance requirements. This paper presents the Honeywell new developed Moisture sensor and applications.

For Achievement of Environmental Standard in Gulf of Toyama- Reduction of Nitrogen / Phosphorus in Drainage Hirokazu Kondo
Nomachi Mill, Chuetsu Pulp & Paper Co., Ltd.
The achievement of environmental standard situation of COD in Gulf of Toyama changed in the low situation of 32-60% after 1997. It was
concluded that a rise of COD was Inside Production of photo plankton which assumed mineral nutrition salts (nitrogen / phosphorus) fromland level nourishment source in investigation of Toyama prefecture in 2001, and an action of premeditated reduction of nitrogen / phosphorus
in Manufacturing and The sewerage treatment was judged with need. This paper introduce an action in Nomachi Mill for corresponding to aplan of Toyama prefecture.

Effect of External Fibrillation on the Retention of Filler
Taegeun Kang and Hannu Paulapuro
Helsinki University of Technology, Laboratory of Paper Technology

The purpose of this study was to examine the eﬀect of external ﬁbrillation of chemical pulp ﬁbers on the retention of ﬁller during sheet
forming in a high-vacuum dewatering device. An ultra-fine friction grinder was used to prepare fibers with different degrees of external
fibrillation, while keeping their internal fibrillation constant.
The entrapment of ﬁller particles was found to increase with increased internal ﬁbrillation of ﬁbers in the presence of chemical aid, and it canbe further increased by promoting mostly external fibrillation of fibers. Increasing the degree of external fibrillation alone, without changing theinternal fibrillation, can be used as means to control the retention of filler.
Keywords: External fibrillation, Internal fibrillation, Ultra-fine friction grinder, Filler, Retention

2006年9月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL September 2006

Vol.60 No.9 CONTENTS

Topics & Information
A Characteristic and Application of the Hydrophobicity（Non―pollution）Functional Plating forPaper Industry
Junji Taguchi, Tokumi Ikeda, Keiji Nakai and Yong―Bo Chong…(1)LEIPA Schwedt PM4―LWC Production Line of the New Generation―
Osamu Fujimura, Andreas Koehler and Falk Albrecht …(9)The Feature of MJ―Sizer at Actual Coating Operation
Shigenari Horie, Masahiro Sugihara, Hiroshi Miura and Toshiaki Miyakura…(16)Model―Based Predictive Adaptive Control of Pulp and Paper Mill Processes
Jyunji Mizuki, Tamio Fukuzawa, Duncan Meade, Bill Gouch and Sava Kovac…(22)Application of SAQ® to Modified Cooking Processes(Part III)

Junji Tanaka…(32)Precise Fixed Quantity Injection System for Dyestuﬀ

Keiichirou Oono…(37)

The Characteristics and Functional Mechanism of Retention Aid"Nano Cluster Dispersion(ND)Polymer"

Yoshiya Yamaguchi and Takumi Ohara…(42)Solutions for Papermaking Problems with New Spraying Chemicals Part II

Yoshihiro Ando…(50)―A Study of Deposit Control Agents for Shower Application by Measuring Zeta―Potential
on Flat Plates―
Material Retention―A New Concept for CMC

Teuvo Piilola…(60)

A New Raser Peak Consistency Transmitter

Bertil Olsson…(66)Sumitomo Stripping System for Deodorization:Sumitomo/SFLOW®

Koji Masuda…(73)―High Eﬃciency Type for 「Reduction of Steam Consumption」&「Reduction of COD」―
Development of Technology for Reproducing of Marine Environment from Dredged Sediments
by Using Paper Sludge Ash and Its Beneﬁcial Applications for Cleaning Ago Bay
Daizo Imai, Tadaya Kato, Ahmed Dabwan and Isamu Harada…(80)
Automatic Folio Size Ream Feeding System

Toshio Aoki…(89)―Full Automatic―
A Report on the 2006Japan―China Pulp and Paper Technical Exchange Symposium
Mitsuaki Otsuki, Soichi Saji, Toshihiko Koshino and Kunitaka Toyofuku…(93)Research Report
Elastic Stress Analysis on Corrugated Fiberboard Container of a Box Shape under Uniform
Compressive Loading in Upper and Lower Edges(On Isotropic Side Plates)
Satoru Matsushima and Shigeo Matsushima…(102)
Pulp and Paper Mills in Japan (61)―Tonegawa Division Paper Board Mill, Rengo Co., Ltd.―

Rengo Co., Ltd.…(119)Committee report…(03)

Coffee break…(101)

Papyrus…(125)

Industry News(Domestic and International)…(128)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(141)

List of Patents issued and Laid―open Publication…(143)

Price list of Domestic Logs and Wood Chips by District…(153)

Wholesale Price list of Papers at Tokyo Trade Center…(154)

Other Monthly Statistics…(156)

News from the Association…(158)

2006年9月

紙パ技協誌[プリント用ページ]
A Characteristic and Application of the Hydrophobicity(Non-pollution) Functional Plating for Paper Industry
Junji Taguchi, Tokumi Ikeda and Keiji Nakai
Nomura Plating Co., Ltd.
Yong-Bo Chong
Research Institute for Applied Science
Last time, at this society, we succeeded in development of a hydrophobicity functional plating, announced that rough feature, and examined apossibility that this plating could be used in the paper industry. In this announcement, in order to examine a possibility that this plating in thepaper industry can be used, the environment which can release and use the detailed data of this plating further was reached, and possibility was
examined.

LEIPA Schwedt PM 4
- LWC Production Line of the New Generation Osamu Fujimura
Voith IHI Paper Technology Co., Ltd.
Andreas Koehler and Falk Albrecht
Voith Paper GmbH & Co. KG
On July 30, 2004 the ﬁrst LWC paper was wound on the Sirius reel of PM4 at LEIPA Georg Leinfelder GmbH in Schwedt an der Ober,
Germany. PM4 produces 300,000 tons of high-quality LWC paper per year on a wire width of 8.90 meters. Production can be based on up to
100% recovered paper. To produce the highest product quality, Voith bases the entire production process on the One Platform Concept.

The Feature of MJ-Sizer at Actual Coating Operation
Shigenari Horie, Masahiro Sugihara
Hiroshima R&D Center, Mitsubishi Heavy Industries, Ltd.
Hiroshi Miura and Toshiaki Miyakura
Paper & Printing Machinery Division, Mitsubishi Heavy Industries, Ltd.
Film coater, such as gate roll and rod metering, is well accepted as sizing and on-machine coating device by its compactness, runnability andperformance for production quality. Its low mechanical friction stress, acts on base paper in the applicator roll nip, reduces sheet breaks andthen improves production efficiency. In addition to above, either low fluid dynamic pressure acts on base sheet in applicator roll nip region, andless penetration of coating into base sheet at the film metering process realizes better surface coverage of base sheet. Those features make thefilm coater as a suitable device for light weight and ultra light weight coated products.
MJ-Sizer, our state-of-the-art rod metering type ﬁlm press, has several advantages for stable operation, eﬃcient production and easy
maintenance. In this paper, we present the features and advantages of MJ-Sizer those realize high efficiency in light weight coated paper
production.

Model-Based Predictive Adaptive Control of Pulp and Paper Mill Processes
Jyunji Mizuki and Tamio Fukuzawa
Andriz K.K., Japan
Duncan Meade, Bill Gough and Sava Kovac
Ideas Simulation Inc., Andritz GroupThis paper describes the application of a model based predictive adaptive process controller (Brain Wave?) to a number of pulp and paper
mill control loops. These loops were maintained in either open loop (manual) or PID control prior to the application of the continuous
controller due to their typically slow and varying process dynamics, since these processes are very difficult to control. All the Before applicationof the advanced controller, these loops required used different traditional control strategies, such as cascade schemes, varying model parametersor feedforward compensation.
Keywords: Model-Based Predictive Adaptive Control, Brain Wave, Reel Brightness, Recausticizer
Conductivity, Slaker Temperature, pH Control, Pulp and Paper Process Control

Application of SAQ® to Modified Cooking Processes (PartIII)
Junji Tanaka
Kawasaki Kasei Chemicals Ltd.
SAQ® has been used as a cooking additive in many KP mills. This process is known as "Quinone Cooking". In order to apply SAQ andpolysulfide (PS) to the recent modified cooking process, more effective condition for SAQ has been investigated. The following results havebecome clear with the small digester developed by KKC in which addition and extraction of cooking liquors are possible during cooking.
1) In this experiment, the synergistic effect of SAQ and PS in the divided addition of liquors was almost the same as in the whole addition (nonseparating) of liquors.
2) The result was improved by changing from PS liquor to white liquor, which was added in the middle of cooking (at the time of cooking
temperature being 130℃) .
3) As to the condition with SAQ and the model PS liquor in this experiment, the PS concentration for acquiring the greatest effects wasestimated at approximately 6g/L.

Precise Fixed Quantity Injection System for Dyestuff
Keiichirou Oono
IWAKI Co., Ltd.
When injecting dyestuﬀs into a pulp, dyestuﬀs are blended with pulp after the dyestuﬀs is taken from a dyestuﬀ tank, which is the mixture ofdilution water and dyestuffs. However, this method requires the management of the liquid volume and space for the tank. Moreover, the savingof labor and space requires the in-line system that allows dyestuffs to be injected directly to pulp-line.
But in case of using the feedback control by continuous ﬂow pump in the in-line type, which is shown in view 1, a large scale system that
equips the flow meters, control valves and controllers is required. Therefore, there are some obstacle to obtain the great labor and space saving.
The pump must always transfer liquid quantitative and precisely against pressure change in pipe-line.
To solve the problems above, it reports on the function and the feature of the in-line injection system with the Hicera pump.

The Characteristics and Functional Mechanism of Retention Aid "Nano Cluster Dispersion (ND) Polymer"
Yoshiya Yamaguchi and Takumi Ohara
Shonan Research Center, HYMO Corporation
The novel retention aid cationic polymer; Himoloc Nano Cluster Dispersion (ND) polymer have been developed by water in salt-water
dispersion polymerization technology.
The aqueous solution of the polymer shows particle behaviors because of its partial crystal or cluster structure in the molecule created during
the precipitation polymerization reaction.
The particle behaviors of the polymer result in swift dispersion into the pulp slurries, small and strong ﬂock with small stress-deviation andhomogeneous formation of the web.
The polymer will be applied especially for the neutral papermaking and newsprint furnishes at the high-speed machines, where the pulp
slurries contain high ratio of fine recycle-fiber or calcium carbonate filler.
The retention and performance and adaptability for the papermaking process were discussed based on the unique behaviors of the polymer
solution.

Solutions for Papermaking Problems with New Spraying Chemicals Part II―A Study of Deposit Control Agents for Shower Application by Measuring Zeta-Potential on
Flat Plates―
Yoshihiro Ando
Paper Chemicals Lab., Nichiyu Solution Inc.
Roles of deposit control agents are becoming more important for quality improvements of paper and paperboard in recent years. The
advantage of deposit control agents for surface treatment is to solve deposit problems efficiently by controlling deposits on surfaces of pulp
sheets with chemicals transferred from wire, felt, and roll parts in wet-end sections of papermaking. The main functional mechanism of "Spanol
N-3250" is "Passivation" of wire and felt, etc. Therefore, "Spanol N-3250" has excellent effects not only on deposit control but also on drainage
improvements in wet-end sections.
This paper describes "Passivation" of deposit control agents for shower application such as "Spanol N-3250" by measuring zeta-potential on
flat plates. As a result, we found that "Spanol N-3250" quickly adsorbs onto hydrophobic plastic surfaces of the same materials as machine
clothing and forms the hydrophilic layer.
We also propose new solutions with "Spanol N-3253" to provide improved performance in papermaking. "Spanol N-3253" combines theabove-mentioned benefits of "Spanol N-3250" and excellent effects on dispersing calcium carbonate that is one of the main components incomplex deposit. This means that "Spanol N-3253" is especially effective as felt conditioner.

Material Retention - A New Concept for CMC
Teuvo Piilola
CP Kelco Oy
It is a well documented fact that poor water retention will not only increase the solids content of the coating color, but will also change otherfactors such as the particle size distribution of pigments in the coating layer, the impact of which will become evident. Carboxy Methyl Cellulose(CMC) due to its multi function capability (water retention, rheology modification and the carrying of optical brightening agents) has
traditionally been one of the most important coating components for the provision of good runnability.
In this paper we will more correctly discuss the concept of material retention and its implications rather than conﬁne it to the generic termwater retention. It is not only water which goes to the base sheet during the coating process, all of the mobile material will be affected as well,such as small pigment particles, latex, optical brighteners and stearate. This is why we are discussing material retention, which will have a huge
impact on runnability and the quality of coated paper produced. The need for more targeted material retention systems will be summarized.

A New Raser Peak Consistency Transmitter
Bertil Olsson
Spectris Co., Ltd. BTG DivisionThis paper examines the importance of accurate and reliable consistency measurement and control. It presents a completely new type of
consistency analyzer that opens possibilities for utilizing the knowledge of process control technology for practical implementation, which todate has been restricted by the imperfections of traditional consistency analyzers.
Practical applications with improved calculations for screening and stock preparation are presented and discussed.

Sumitomo Stripping System for Deodorization : Sumitomo/SFLOW®
- High Eﬃciency Type for 「Reduction of Steam Consumption」&「Reduction of COD」-

Koji Masuda
Sumiju Plant Engineering Co., Ltd.
We have been applying stripping technology to odorous wastewater treatment, especially for condensate of digester and the drain of
evaporator at kraft pulping process. And Sumitomo have been delivering both air stripping and steam stripping plants for long times.

Now we have the know-how of the separation process (distillation, absorption, stripping etc.) with high performance structured packing,
Sumitomo/SFLOW®.
On this paper, we introduce Sumitomo stripping system for deodorization with latest delivery reference.

Development of Technology for Reproducing of Marine Environment from Dredged Sediments by Using Paper Sludge Ash and Its Beneficial
Applications for Cleaning Ago Bay
Daizo Imai, Tadaya Kato and Ahmed Dabwan
Mie Industry and Enterprise Support Center,
Collaboration of Regional Entities for the Advancement Technological Excellence
Isamu Harada
Nippon Paper Industries Co., Ltd., Environmental Dept.
Paper sludge (PS), which is mainly made from paper factories waste can be utilized for useful applications. We developed the solidiﬁed
material by incinerating PS, and applied this technology for restoration of the marine environment ecosystem.
The applicable areas can be summarized as follows;
1) Development of materials to be used as coagulant and hardeners.
2) Making micro-habitat pellets and marine blocks in order to treat contaminated seawater andpolluted sediments.
3) Creating stable surface area for culturing seaweeds and seagrasses (Amamo etc.).
4) Making artiﬁcial tidal ﬂats. We believe these tidal ﬂats will contribute to enhance the stabilityof the ground in areas where the conditions are poor. It can provide also a vital habitat for
diﬀerent benthic species.

Automatic Folio Size Ream Feeding System- Full Automatic Toshio Aoki
Maruishi Co., Ltd.
Maruishi introduces a revolution in paper industry, namely "Automatic Ream Feed Robot". This system was developed by Schneider
Engineering in Switzerland and today, Maruishi manufactures the system under the license agreement with Schneider Engineering. The
characteristic is as follows.
・Fully automatic working operation for ream feeding and size change
・Sheet is counted by optical special camera and correct number of sheet per ream is
automatically fed into wrapping machine.
・No more tape inserter or ink mark for ream feeding and no more maintenance for the bothdevices
・Constant ream feeding ensures the higher productivity per day comparing with man power
feeding

A Report on the 2006 Japan-China Pulp and Paper Technical Exchange Symposium
Mitsuaki Otsuki*1, Soichi Saji*1, Toshihiko Koshino*2 and Kunitaka Toyofuku*3*1Oji paper Co., Ltd.
*2Hokuetsu Paper Co., Ltd.
*3JAPAN TAPPI
The ﬁrst Japan-China technical exchange, "2006 Japan-China Pulp and Paper Technical Exchange Symposium", sponsored and arranged by
Japan TAPPI and China TAPI, was held on May 23-24, 2006 in Beijing, China. The number of participants of both countries was almost 200.
After the symposium, Japanese participants visited two mills.

Elastic Stress Analysis on Corrugated Fiberboard Container of a Box Shape under Uniform Compressive Loading in Upper and Lower Edges(On Isotropic Side Plates)
Satoru Matsushima
Guest Professor, Center for Corporative Research and Development,
Ehime University
Shigeo Matsushima
Professor Emeritus, Ehime University
An elastic formulation of bending deformation for side plates of the case (width 350mm, height 300mm and thickness 5.44mm, longitudinalcoefficients 291N/mm2 and Poison's ratio 0.10) of the corrugated fiberboard box shape made by applied uniform compression loading of width
direction strain zero in upper and lower edges was expressed by the application to reasonable stress function combination. And from thisformulation, bending stresses were calculated and these characteristic behaviors were discussed.
Absolute maximum value of bending normal stress (bxmax=-0.0652N/mm2) in width direction is at plate centers and maximum values ofbending normal stress (bymax=0.262N/mm2) in height direction, principal stress (=0.262N/mm2) and deflection (=3.36mm) are at centers ofside edges. And absolute maximum value of bending shear stress (bxymax=±0.163N/mm2) and principal shear stress (=±0.163N/mm2) areat plate corners. Ratios of bending stresses and plane stresses (xmax, ymax, xymax) are bxmax/xmax=6.6, bymax/ymax=2.6,
bxymax/xymax=33.5 and those large ratio values are made of bending deformation easiness for the shape of wide and thin side planes.
Keywords: Computational Mechanics, Structure Analysis, Elastic Bending, Case of CorrugatedFiberboard, Elastic Stress Analysis, Structure Strength, Numerical Analysis

2006年10月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL October 2006

Vol.60 No.10 CONTENTS

Topics & Information
A New Felt Conditioner

Satoshi Wada and Kenji Kowata…(1)―PRESS SHOT Series―
BTF Headbox and BTF Dilution Control System

Junichi Yano…(8)―Application Report on BTF Dilution System―
kajaaniPulpExpert, On―line Automatic Pulp Laboratory with Revolutionary New Fiber

Takeshi Sato and Masanori Shimozaki…(17)and Shive Measurement
Development of Healthy/Functional Crops

Koichi Sugita…(24)

For Sound or Noise in Industrial World

Yasuhiko Yamasaki…(33)―As Part of T. F. O. from SKF―
Introduction of Latest Development of Dienes Cutting Technology Both in Soft and Hard
―Is Your Slitting System Still Proﬁtable―

Heinz Herkenrath and Moritake Onuki…(38)Eﬀective Pest Control Activities

Shinya Yokoo…(42)The Development of a Functional Heating Sheets Using a Papermaking Technique
Yoshiaki Kumamoto, Masataka Ishikawa, Tooru Ugajin, Hidetoshi Ooga and Hironobu Kawajiri…(46)
IQInsight

Junichi Mori…(52)

New Techniques for Paint and Coating Applications

Keisuke Miyamoto…(59)

New Folio Size Sheeter Technology

Robert Deutschle and Kimio Shigeta…(64)―FS―PRO Mark―Free Sheeting Technology―
A Report of the2006（73rd）Pulp and Paper Research Conference
Wood Science Committee, JAPAN TAPPI…(69)

The2006 Pan Paciﬁc Conference―June6〜9，2006at Seoul, Korea―
Takayuki Okayama, Toshiharu Enomae, Hiroshi Ohi,Toshihiro Ona, Makoto Iwasaki,
Yosuke Uchida, Shunichiro Uno and Kunitaka Toyofuku…(93)Report of2006TAPPI Coating and Graphic Arts Conference

Jun Makihara…(101)

Report of Studying at Royal Institute of Technology

Koki Kisara…(108)Introduction of Research Laboratories (55)
Ecomaterial Engineering, Department of Natural Resources Process Engineering,…(12)

Interdisciplinary Faculty of Science and Engineering, Shimane University
Research Report(Original Paper)
Synthesis of Artiﬁcial Zeolites Containing Titanium Dioxide and Their Abilities for Removing
Bad Smell Substances
Satoru Fukugaichi, Akira Uramoto, Hideaki Ichiura, Masaaki Morikawa, Shouichi Kyougoku,
Kousaku Nagashima, Toru Yamamoto, Naoto Matsue and Teruo Henmi …(115)
Pulp and Paper Mills in Japan(62)―Sobue Mill, Oji Paperboard Co., Ltd.―
Committee reportOji Paperboard Co., Ltd.…(125)…(3)

Essay on Intellectual Property…(111)

Coffee break…(114)

Papyrus…(131)

Industry News(Domestic and International)…(136)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(149)

List of Patents issued and Laid―open Publication…(151)

Price list of Domestic Logs and Wood Chips by District…(162)

Wholesale Price list of Papers at Tokyo Trade Center…(163)

Other Monthly Statistics…(165)

News from the Association…(167)

2006年10月

紙パ技協誌[プリント用ページ]
A New Felt Conditioner- PRESS SHOT Series Satoshi Wada and Kenji Kowata
Kurita Water Industries Ltd.
In recently years, various new types of contaminations are occurred in the papermaking process, they decrease the productivity of
papermaking. Felt conditioner are applied for resolving these problems.
There are very few technical reports describe on the relation between papermaking conditions and the variation of contamination, and theirtreatments. Here, felt conditioners named "PRESS SHOT" series were developed based on a new concept, and their applications wereintroduced in this paper.
PRESS SHOT series were designed and developed for dealing various kinds of the contamination in papermaking. They are especiallyeffective for decreasing the contamination by calcium carbonate, and increasing the papermaking productivity.
It is believed that PRESS SHOT will match the increasing trend of higher ﬁller content using calcium carbonate.

BTF Headbox and BTF Dilution Control System- Application Report on BTF Dilution System Junichi Yano
Design Section, Kawanoe Zoki Co., Ltd.
Now two BTF automatic dilution system are running smoothly in Japan.
First installation is at Marusumi Paper PM3 in 2004, and second one is at Ehime Paper PM2 in 2005. Those two installations have achievedmuch better level of 2 sigma than the target value we had expected. And we are starting up the third BTF dilution system at M Paper PM4 inthis August. Those three installations are BTF dilution system retrofit to the existing headbox. BTF dilution system retrofit is in some means toenhance the performance of the existing headbox by replacing the tapered header with the BTF Central Distributor and BTF dilution system.
The BTF retrofit mentioned above gives your headbox a new breath.
A complete new hydraulic headbox with BTF dilution system is in our scope of supply. 60 BTF headboxes have already been installed inEurope and 20 in North America.
Substantial improvements in CD profile, fiber orientation, and formation have been achieved. And in Japan we are starting up a new complete
BTF headbox with automatic dilution system at M Paper in the next January. We will soon be able to show the best result of both third BTF
retrofit to an existing headbox and a first complete new BTF headbox.

kajaaniPulpExpert, On-line Automatic Pulp Laboratory with Revolutionary New Fiber and Shive Measurement
Takeshi Sato and Masanori Shimozaki
Metso Automation, Field Systems Division
After 15 years experiences and close co-operation with the customers, there has been launched new generation automatic pulp testinglaboratory - kajaaniPulpExpert. Compared to old PulpExpert systems, the measurement modules are improved to fulfill the demanding needs oftoday's pulp and paper quality management: high measurement precision and low maintenance need.
kajaaniPulpExpert has a new technology for measuring shives and ﬁbers. New revolutionary, outstanding performance, measurement module
for measuring fibers and shives has been developed. New measurement algorithm is not just for kajaaniPulpExpert, but also for other Metso
fiber analyzers; FiberLab and FS300.
Measurement speed, analyzed ﬁber amountandrepeatability are

5-10 times

better than any ﬁber measurement in the past. Module issuitable for all type of paper pulps. Module will be possible to install as update for existing PulpExpert systems.

Development of Healthy/Functional Crops
Koichi Sugita

Forestry Science Laboratory, Nippon Paper Industries Co., Ltd.
We have developed the original technology to generate genetically modiﬁed woody plants for pulp materials. For example, we produced ananti-salt damage genetically modified eucalyptus into which the gene of anti-salt bacteria was introduced. Although a lot of genetically modified
plants have been developed in all over the world, the eucalyptus is one of the most difficult plant species. We developed the original technology
to generate a genetically modified eucalyptus. This technology could be applied to produce healthy/functional crops which healthy/functional
materials, peptide or protein, were accumulated into an edible part of plant. We mainly introduce here genetically modified rice seeds for theprevention of human cedar pollen allergy and type-II diabetes. These rice seeds demonstrated the potential to induce biological effects incultured mouse cell systems. We will commercialize the rice seeds in near future, following verification of efficacy and safety in animals andhuman.

For Sound or Noise in Industrial World- As Part of T.F.O. from SKF Yasuhiko Yamasaki
Condition Monitoring Service Division, SKF JapanThe noise and the vibration that maintenance person says are the one while the machine is operating it. Where does the noise come? The
mystery is investigated.
It thinks about the efficiency improvement of the industrial world once by considering the generation mechanism of the sound or noise now.

Introduction of Latest Development of Dienes Cutting Technology Both in Soft and Hard
- Is Your Slitting System Still Profitable Heinz Herkenrath and Moritake Onuki
Dienes Japan
Concerning with Dienes "Full Automatic Slitting ", we have to admit that there are lots of newly developed features beyond our expectation.
One of them is a "Cutting point" to be kept mechanically with its system. Mechanically referred is a specially designed and manufactured "Ballbearing knife holders axles (zero gap in between)" combined heat treated mechanical components. PLC control system can guarantee"Automatic depth adjustment" to be within ±0/05mm and its CSL to be continuously maintained.
Automatic positioning system is guaranteed to be free from vibration and keep its accuracy ±0.1mm with its speed 1,500mm/min (5 to 6
units combination of Top and Bottom knife can be positioned within approximately 30 second).
Based on these developments, a lot of cutting loss can be reduced together with increasing number of layers (multi layer of non coatedpaper,850g/m2 can be cut smoothly) and contribute its manufacturing efficiency.
Not only Automatic positioning system, Dienes as a long experienced German knife manufacture have been developing its original knife
quality to be fit for clean cut with long life running.

Effective Pest Control Activities
Shinya Yokoo
Research & Development Division, Earth Environmental Service Co., Ltd.
ESCO (Earth Environmental Service Co., Ltd.) have made annual base contact with up 7,000 food-related facilities, including food contact
packaging manufacturing factories, for prevention of foreign mater from finish products. Any contamination derived from environment such asa contents product, a bottle and/or a package material, facilities, manufacture machines, an air environment, pests, use water, wastes and a
consciousness of all of the members (contained outside workers).
However, these activities don't work well or not eﬀect. For example one of the person does activities, another persons don't know activities.
And they dose not distinguish phenomena from causes.
Today, we explain about eﬀective pest control activities in the quality assurance.

The Development of a Functional Heating Sheets Using a Papermaking TechniqueYoshiaki Kumamoto, Masataka Ishikawa, Tooru Ugajin, Hidetoshi Ooga and Hironobu Kawajiri
Processing Development Research Laboratories, Kao Corporation
We have focused on adoption of pulp that is a recyclable material, instead of plastic that is an exhaustible resource, and developed "a paper
bottle" in 2000 for the ﬁrst time in the world as an attempt to the recycling society in the future1〜2). In this development, we found out thatthe pulp is a material with a great diversity and can immobilize a functional powder at a high ratio3).
We have developed a ultra-thin and ﬂexible heating sheet element with abundant steam generation by immobilizing the iron powder and theactivated carbon on the pulp in a high density, applied paper-making technique4〜6).
In this paper, we report this heating sheet element that is quite diﬀerent from a common heating element such as the body warmer.

IQInsight
Junichi Mori
Metso-SHI Co., Ltd.
A new, instantaneous full-sheet moisture proﬁle measurement has been after the press section. This new measurement system, called
IQInsight, takes instantaneous profiles of the moving paper using an array of infrared detector modules across the web. This measurement array
and associated fiber optic cabling are embedded in a pressurized protective enclosure that is located early in the first dryer section.
With this measurement, short-term machine direction and cross direction disturbances that cannot otherwise be seen clearly with traditional
dry end scanning measurement are isolated and quantified. Specific examples of MD and CD stability problems that have been identified andcorrected are presented.

New Techniques for Paint and Coating Applications
Keisuke Miyamoto
Nihon SiberHegner K.K.
In practical applications the following information is important concerning the rheological behavior of coatings:
・Time depending behaviors directly after a sudden change of shear conditions. Practical use:
Application behavior (thixotropy), leveling, sagging, layer thickness.
・Rheology plays an important role in dewatering processes. It is therefore interesting to analyze
the dewatering process and the rheological behavior of a suspension simultaneously.
This paper informs newer rheological measurement about the behavior paints and coatings. Presented is a new test method for theinvestigation of the thixotropic behavior.

New Folio Size Sheeter Technology- FS-PRO Mark-Free Sheeting Technology Robert Deutschle
E.C.H.WILL GmbH Germany
Kimio Shigeta
Paper Converting Machinery Sect., 2nd Machinery Dept., K.K. IRISU
Today's folio sheeting industry is facing a challenging situation. The printing industry requires high quality paper and board material toachieve high-quality printing results to satisfy their customers' needs.
At the same time, paper mills and converters face high price and cost pressure due to smaller order sizes and shorter time to delivery. In thissituation, marks and scratches on high-quality paper and board mean insufficient product quality, less output, more waste, lower efficiency andproductivity of equipment and can result in customer claims, loss of image and, at the worst, loss of future orders.
E.C.H. Will has found the solution to avoid marking on the surface of top quality paper and board, even at speeds of up to 350m/min.

The 2006 Pan Pacific Conference- June 6-9, 2006 at Seoul, Korea Takayuki Okayama*1, Toshiharu Enomae*2, Hiroshi Ohi*3, Toshihiro Ona*4, Makoto Iwasaki*5, Yosuke Uchida*5, Shunichiro Uno*6 andKunitaka Toyofuku*7*1 Tokyo University of Agriculture and Technology*2 The University of Tokyo*3 University of Tsukuba*4 Kyushu University*5 Oji Paper Co., Ltd.
*6 Nippon Paper Industries Co., Ltd.
*7 JAPAN TAPPI2006 Pan Paciﬁc Conference was held (6-9 June) under the auspices Korea TAPPI in Seoul, Korea. Mr. Okayama, professor of Tokyo
University of Agriculture and Technology and Mr. Toyofuku, executive director of JAPAN TAPPI attended the conference as therepresentatives of JAPAN TAPPI. Pan Pacific Conference is held every two years in the rotation of 8 countries of Pacific Rim. The conference
was held in Canberra, Australia in 2004. At the 2006 conference 8 Japanese speakers attended. A summary of Japanese presentations and otherinterested ones are described.

Report of 2006 TAPPI Coating and Graphic Arts Conference
Jun Makihara
Research and Development Dept., Product Development Research Lab.
Nippon Paper Industries Co., Ltd.
2006 TAPPI Coating and Graphic Arts Conference was held in Atlanta, GA, USA from April 24 to 27. This technical conference included 69
presentations in 21 sessions. The author had an opportunity to attend it, and review some of presentations in this report.
International Conference on Nanotechnology for the Forest Products Industry, which was organized by TAPPI for the ﬁrst time concerning
about nanotechnology, was also held at the same place from April 26 to 28. This report introduces a few of presentations as well.

Report of Studying at Royal Institute of Technology
Koki Kisara
R&D, Pulp and Paper Research Laboratory, OJI Paper Co., Ltd.
The author had an opportunity to study at Royal Institute of Technology (KTH) in Stockholm, Sweden for one year in 2005. The authorjoined "Wood and Pulping Chemistry Research Network (WPCRN)" project in department of Fibre and Polymer Technology of KTH as aguest researcher. In this report, the review of WPCRN, the impression of the studying, and the life in Sweden are presented.

Synthesis of Artificial Zeolites Containing Titanium Dioxide and Their Abilities for Removing Bad Smell Substances
Satoru Fukugaichi, Akira Uramoto, Hideaki Ichiura and Masaaki Morikawa
Paper Industrial Research Institute of Ehime Prefecture
Shouichi Kyougoku and Kousaku Nagashima
LINTEC Corporation
Toru Yamamoto, Naoto Matsue and Teruo Henmi
Faculty of Agriculture, Ehime University

Paper sludge (PS) has been discharged from paper-mill as an industrial waste of paper manufacturing processes. Most of them has been
burned in an incinerator and thrown into the discard as solid waste for reclaiming a land. It is urgent matter to establish an effective techniquefor a recycling of PS, in consideration of current envirornment-oriented trend. In recent years, the formation of zeolites using PS ash has beenreported. Acetaldehyde (CH3CHO) is a kind of toxic gas with strong fruity smell, and is contained such as in motor exhaust and tobacco smoke.
It is strongly required to develop agents for removing toxic gases, in relation to current health-oriented trend. In this study, we tried tosynthesize three types of zeolites, NaP1 (P-TiO2), Zeolite A (A-TiO2) and Faujasite (F-TiO2), from PS ash containing titanium dioxide,
discharged from paper mills in Shikokuchuo-shi. These zeolites were produced by hydrothermal reaction with sodium hydroxide. The capacityof these formed zeolites containing titanium dioxide was evaluated by removing acetaldehyde experiment. All formed zeolites containing
titanium dioxide had abilities for removing acetaldehyde gas. In particularly, F-TiO2 showed the highest activity. It was suggested that thezeolites synthesized using from PS ash would have enough ability for the removal of toxic gas in atmospheric environment.
Key words: paper sludge, zeolite, titanium dioxide2006年11月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL November 2006

Vol.60 No.11 CONTENTSENVIRONMENT
Report of the13th Environmental Seminar and RTD
Environment Technical Committee, JAPAN TAPPI…(1)Green Policy in China

Meguri Aoyama…(6)Recent Development of Water Environment Policy：Area―wide Total Water Pollutant Load
Control Scheme for Enclosed Coastal Seas in Japan

Yasuo Takahashi…(11)Current Situation Surrounding Industrial Waste Disposal in Chiba Prefecture

Hiroo Kitada…(18)Roles of Risk Communications in Solution of Soil Contamination Problem

Toichiro Maekawa…(24)

The Regulatory Framework for Pulp and Paper Mill Eﬄuent in North America and Europe
Hitoshi Takagi…(28)
Status and Trend of Environmental Laws and Regulations

Shigenori Imamiya…(35)Technology for Total Chlorine―free Bleaching of Kraft Pulp

Hiroshi Ohi…(45)The Latest Environment Monitoring Technology for Drainage Water and Emission Gas

Hiroshi Mizutani and Katsuaki Ogura…(50)

Utilized in Industrial Plant Factory
Analyzers for Eﬄuent Gas and Waste Water

Kiyoshi Ogawa…(58)Sound and Vibration―Measuring Instrumentation

Tomoharu Wakabayashi…(62)Introductions of the Environmental Measurement Devices of Shimadzu with a Focus

Junichi Kita…(68)on Electronic Nose"FF―2A"
Topics & Information
Operational Experience of the Recycle Boiler

Hiroji Kanuka…(75)

Sludge Dewatering Machine, Rotary Press Filter

Koji Matsumoto…(84)―Dewatering of Paper Mill Sludge―
Biological Eﬀects and Biomonitoring of Pulp and Paper Mill Eﬄuents―Research Topics up to Vitoria2006―
Hiroshi Araki, Reiji Kaneko and Akiko Nakamura…(89)Research Report(Original Paper)
Development of Manufacturing Process for High Quality Calcium Carbonate by Causticizing
Process in a Kraft Pulp Mill（Part１）―Fundamental Study on the Controlling Method of Calcium Carbonate Morphology―
Yasunori Nanri, Haruo Konno, Hideyuki Goto and Kazuto Takahashi…(100)Pulp and Paper Mills in Japan(63)―Futatsuka Mill, Chuetsu Pulp and Paper Co., Ltd.―

Chuetsu Pulp and Paper Co., Ltd.…(113)

Committee report…(3)

Coffee break…(99)

Papyrus…(118)

Industry News(Domestic and International)…(121)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(134)

List of Patents issued and Laid―open Publication…(136)

Price list of Domestic Logs and Wood Chips by District…(149)

Wholesale Price list of Papers at Tokyo Trade Center…(150)

Other Monthly Statistics…(152)

News from the Association…(154)

2006年11月

紙パ技協誌[プリント用ページ]
Green Policy in China
Meguri Aoyama
Asia Group, Nippon Keidanren
China is facing an increasingly polluted environment severe shortages of potable water and declining availability of arable land. As aconsequence, Chinese government is now taking a series of measures to protect the environment. These measures, called green policy, areformulated and executed by two governmental ministries. One is the National Development and Reform Commission, who is responsible forcontrolling the material flow. The other is the State Environmental Protection Administration, who is promoting participation from the civilsociety for protecting the environment.

Recent Development of Water Environment Policy : Area-wide Total Water Pollutant Load Control Scheme for Enclosed Coastal Seas in Japan

Yasuo Takahashi
Office of Environmental Management of Enclosed Coastal Seas,
Environmental Management Bureau, Ministry of the Environment
The Are-wide total water pollutant load control system has been implemented under national legislation including the Water Pollution
Control Law for the Tokyo Bay, the Ise Bay and the Seto Inland Sea, where the population and industrial activities are highly concentrated
along extensive enclosed coastal sea areas. As a result, pollutant load has been steadily decreased in these areas.
As for the current status of the water environment in these sea areas, achievement ratios of the Environment Quality Standards are notsufficient, although the water quality has been clearly improved in the Tokyo Bay.
In the Tokyo Bay, Ise Bay and the Osaka Bay, actual adverse effects are occurring, such as large-scale oxygen-deficient water mass. As for the
Seto Inland Sea (excluding the Osaka Bay), the occurrence of the oxygen-deficient water mass is limited, and the water quality is better thanother sea areas.
Based on these situations, the Central Environment Council submitted a report to the Minister of the Environment on May 18, 2005, entitled"Basic Direction of the 6th Total Water Pollutant Load Control Scheme". In this report, the council recommended that it is necessary to further
reduce the pollutant load in the Tokyo Bay, Ise Bay and Osaka Bay, while continuing existing measures for the Ise Inland Sea (excluding Osaka
Bay) to maintain the present water quality.
The council report also suggested issues to be further addressed, including the consideration of targets for the water quality and methods ofevaluation of these targets. The Ministry of the Environment is in the way to consider these issues under "extensive review of the framework of
the water environment".

Current Situation Surrounding Industrial Waste Disposal in Chiba Prefecture
Hiroo Kitada
Chiba Prefecture, Environment and Life Division, Industrial Waste Dept.
In Chiba Prefecture, about 40% of the amount of illegal disposal in the whole country concentrated in the 1999 ﬁscal year, and it became adishonorable result in which nationwide worst one for three years after that.
The wastes by which illegal abandonment was carried out are the sulfuric acid pitch, the tree waste generated with demolition of a building,construction sludge, construction surplus soil, etc.
For this reason, in Chiba Prefecture, measures, such as strengthening of the surveillance by a green action team etc., installation of theenvironmental criminal division in the Chiba Prefectural Police, and original regulations establishment of Chiba Prefecture, were taken as
illegal abandonment preventive measures, and illegal abandonment has been tackled.
In the 2004 ﬁscal year, the amount of illegal abandonment decreased to 1/20 of the year of a peak as a result of this measure. However, theamount of survival of the waste with which illegal abandonment of the end of the 2004 fiscal year was carried out amounts also to about
3,900,000t.
Therefore, in Chiba Prefecture, motion of removal measure command to a contractor and promotion of the removal and processing byadministrative subrogation are tackled.

Rules of a Risk Communications in Solution of Soil Contamination Problem
Toichiro Maekawa
Environmental Solution Headquarters, KOKUSAI KOGYO CO., Ltd.
After the enforcement of the Soil Contamination Measures Law, a soil investigation usually has been conducted all around the country in an
occasion of a land trading, and the number of contaminated sites which is recognized has been increased rapidly. However the awareness of soil
contamination is arisen in the society, only the negative information about soil contamination such as damage to the human health ordecreasing land price is spread and the enlightenment of appropriate information is not given enough. As a result, many cases that acontamination is recognized fall in to trouble because the anxiety of people who face to a contamination is large and the understandings of acontamination between the stakeholders such as polluter, land buyer and neighborhood are different. Therefore in this problem, the importanceof making the base for a solution by getting common understandings about contaminations between the stakeholders known as risk
communication has risen.
This report introduces the roles of a risk communication that took part in the solution to the soil contamination problem and explains somenotices for proceeding risk communication based on the experience of soil and groundwater contamination cases which the writer faced.

The Regulatory Framework for Pulp and Paper Mill Effluent in North America and Europe
Hitoshi Takagi
Research Department, Japan Pulp and Paper Research Institute, Inc.
In the United States, the National Pollutant Discharge Elimination System (NPDES) of the Clean Water Act is the permitting system tocontrol water pollution. This system consists of both chemical and biological method for the assessment and the reduction of toxic discharges.
The Effluent Limitations Guidelines and Standards (1998) set discharge limits for dioxins, chlorinated phenolics, chloroform, TSS, BOD and
AOX. EPA is developing options to encourage effluent trading for NPDES permittees.
In Canada, the Pulp and Paper Eﬄuent Regulations (1992) under the Fisheries Act set discharge limits for TSS and BOD, and prohibit thedischarge of effluents that are acutely lethal to rainbow trout. As well, mills are required to conduct Environmental Effect Monitoring (EEM)
studies.
The Integrated Pollution Prevention and Control Directive of 1996 is a set of common rules on permitting for industrial installations in the
EU countries. The permits must be based on best available techniques (BAT). The Reference Document on BAT in the pulp and paperindustry set emission levels of TSS, COD, BOD, AOX, total nitrogen and total phosphorus to water. The waste water tax scheme has been
widely adopted in EU member countries to improve water quality.

Status and Trend of Environmental Laws and Regulations
Shigenori Imamiya
Environmental Management Department, Oji paper Co., Ltd.
Although many environmental laws and regulations have been enacted and put in force mainly to tighten the control since the 1990s, thistrend could continue for the duration.
The focus of attention to come in environmental laws and regulations could be placed on (a) energy saving and global warming curbing
countermeasures, (b) waste and recycling affairs and (c) the chemical substance management. Especially, it is expected to introduce a drastic
reform for "Waste Disposal and Public Cleansing Law" because there are some situations taking place, which interfere with adequate recycling.
In this environmental seminar, the environmental laws and regulations are presented, which have been revised for the past several years andhave to be watched closely.
It can be said that for ensuring compliance to environmental laws and regulations, it is necessary to understand the purpose and outline of thelaws and regulations, and raise the level of efforts.

Technology for Total Chlorine-free Bleaching of Kraft Pulp
Hiroshi Ohi

Graduate School of Life and Environmental Sciences, University of Tsukuba
Acid treatment was developed for non-chlorine bleaching of an oxygen-deligniﬁed hardwood kraft pulp. About 70% hexenuronic acid in thekraft pulp was removed after the acid treatment at pH3 for 1 hour at 105℃. After full bleaching with the acid treatment (A) followed by theozone (Z) and the hydrogen peroxide (P), the final brightness of the pulp reached approximately 85 %ISO, keeping the viscosity over 15.0 cP.
Little hexenuronic acid existed in the kraft pulp after this bleaching (A-Z-E-P). Furthermore, the brightness stability of this pulp was muchbetter than that of chlorine dioxide bleached pulps.
Keywords: Kraft pulp, Non-chlorine bleaching, Total chlorine-free bleaching, Brightness, Hexenuronic acid

The Latest Environment Monitoring Technology for Drainage Water and Emission Gas Utilized in Industrial Plant Factory
Hiroshi Mizutani and Katsuaki Ogura
HORIBA, Ltd.
The environmental pollution issue being recognized as social problem in 1960s was local social issue, and the casualty was relatively limited
extent. However, the global environmental issue is currently going through ecological crisis, and we have to consider how to reduce the effects
on the environment the world over. The challenges accompanying in a business activity in environmental priority days is to consider
environmental issue.
Next year is the 40th anniversary of the enactment for fundamental low of pollution in Japan. We outline in terms of steps in the progress ofmonitoring technology related to environmental problem and the latest environmental monitoring technology.

Analyzers for Effluent Gas and Waste Water
Kiyoshi Ogawa
DKK-TOA CORPORATION, Sales Planning Dept.

Environmental pollution surely escaped from the worst state. But, is not complete. Movement of environmental puriﬁcation must becontinued. What primarily you must do will be grasp of the situation. It will be necessary more and more in future to grasp the environmental
situation broadly more precisely. I introduce a trend about environmental measurement and a way of thinking of an analyzer along it as follows.

Sound and Vibration - Measuring Instrumentation
Tomoharu Wakabayashi
RION Co., Ltd.
The environmental pollution issue of noise and vibration has relations very much in our daily life. There are a lot of complaints concerning
the noise and the vibration in the complaint concerning pollution. In this report, it introduces instruments to measure noise and vibration.

Introductions of the Environmental Measurement Devices of Shimadzu with a Focus on Electronic nose "FF-2A"
Junichi Kita
Shimadzu Corporation, Analytical & Measuring Instruments Division
The present situations of the odor measurements are explained. The principle of the electronic nose is presented. Some improvements of theelectronic nose toward the practical applications are shown. One of the improvements is using the trap tube in order to avoid humidity
interferences and another is to use new analytical method of sensor signals. Using new signal processing drives the absolute values of odor
intensity and odor characters. The odor continuous monitoring of the black liquor's combustion furnace is explained by using improved
electronic nose.
Keywords: Electronic nose, trap tube, multivariate analysis, odor characteristic measurement, Continuous measurement of odor

Operational Experience of the Recycle Boiler
Hiroji Kanuka
Hachinohe Mill, Mitsubishi Paper Mills Limited
From the point of view of the global warming and the cost performance of the fuel, the fuel conversion, from the fossil fuel to the biomass, hasrecently been prompted among the pulp and paper industry in Japan.
Because the fuel conversion had been one of the most important problems in Hachinohe mill for years, we decided to install the waste boiler
that used waste tires, waste wood and paper sludge as fuel. At last we started the commercial operation of the waste boiler in July 2004. Since
then, the boiler has been working well.
As a result of the operation of this waste boiler, we were able to reduce not only the energy cost but also the amount of the CO2 discharge.

Sludge Dewatering Machine, Rotary Press Filter-Dewatering of Paper Mill SludgeKoji Matsumoto
Application Development Section Process Engineering Department
Machinery & Equipment Division
TOMOE ENGINEERING CO., LTD.
Dewatering process is an important process to reduce and solidify sludge, and people are asking for an eﬀective machine. Further, because ofincreased interests in the global warming due to CO2 emission, a machine with not only with good dewaterability but also with low power
consumption is desired. Rotary Press Filter is a sludge dewatering machine with new structure that has been introduced by Fournier Industries
Inc. in Canada and is now being manufactured and sold by Tomoe Engineering. In addition to its features such as low power, simple structure,space saving, and less wash water, this dewatering machine is suitable for the new times in respect of maintenance and control. Since its
introduction, number of units installed has been increasing year by year. In Japan we have installed 44 units for dewatering of sewage sludge,
plant wastewater sludge, etc. Among them, 11 units have been installed for dewatering of papermaking wastewater sludge. In this report, I will
introduce Rotary Press Filter's performance and effect of introduction.

Biological Effects and Biomonitoring of Pulp and Paper Mill Effluents- Research Topics up to Vitoria 2006 Hiroshi Araki, Reiji Kaneko and Akiko Nakamura
Japan Pulp and Paper Research Institute, Inc.
The 6th International Symposium on Environmental Fate and Eﬀects of Pulp and Paper Mill Eﬄuents (Fate & Eﬀects Symposium) was heldas "Vitoria 2006" on April 9-13 in Vitoria, Brazil. Since 1991, the Fate & Effects Symposium has played an important roll as a place ofdiscussion for researchers on aquatic organism's response and toxicity associated with pulp and paper mill effluents. Topics of the symposiums
for 15years, including health assessment, toxicity identification, bioaccumulation and hormonal activity, are reviewed and the current of
biological regulations (biomonitoring) in EU and North America are discussed.
Keywords: Environmental Fate and Effects, Pulp and Paper Mill Effluents, Aquatic Organism, Environmental Impact, Toxicity,
Bioaccumulation, Endocrine Disruption, Biomonitoring

Development of Manufacturing Process for High Quality Calcium Carbonate by Causticizing Process in a Kraft Pulp Mill (Part1)-Fundamental Study on the Controlling Method of Calcium Carbonate MorphologyYasunori Nanri, Haruo Konno and Hideyuki Goto
Pulp and Paper Research Laboratory, Nippon Paper Industries Co., Ltd.
Kazuto Takahashi
Gotsu Mill, Nippon Paper Chemicals Co., Ltd.

Causticizing step is a process to convert green liquor into white liquor in kraft pulping mill, and this process also produces a precipitatedcalcium carbonate as a by-product. If this causticizing calcium carbonate (CCC) could be extracted from this step as paper making material, thelime-kiln operation would be shortened or stopped; thus the consumption of fuel oil and the discharge of CO2 gas can be reduced. However,the conventional CCC has serious problem of lower brightness, higher wire abrasion and poor opacifying ability as paper filler. Then, we
challenged controlling the morphology of CCC like commercial precipitated calcium carbonate (PCC). In this paper, slaking and causticizing
reactions were separated and precisely controlled, and then various shapes of CCC with high opacifying ability and little wire abrasion could be
successfully obtained.
Keywords: Causticizing Reaction, Precipitated Calcium Carbonate, Filler

2006年12月

紙パ技協誌[プリント用ページ]
JAPAN TAPPI JOURNAL December 2006

Vol.60 No.12 CONTENTS

Papermaking Technology I
Review of Paper Coating Technologies

Koji Okomori…(2)Recent Trends on Coating Color and Its Latex

Hisashi Matsui…(12)Recent Coating Color Preparation System

Hidehiko Yamazaki…(24)The Latest Technology and Trends in Coating Pigments
Operating Experience：No．１

Chris Nutbeem…(33)Coating Machine at Ishinomaki Mill

Toshihiko Nishikawa…(44)

GelView Sensor to Optimize the Coater Drying System

Junichi Masuda…(50)Operating Experience：No．５

Masato Shiraishi…(59)Coating Machine at Hachinohe MillInﬂuence by Coating Blade on Coating Machine Operation

Jerome Michaut and Takuya Maekawa…(64)Operating Experience：PM８ On―machine Coating at Niigata Mill

Kazuhiro Takasumi…(70)Topics & Information
A Report on International Paper and Coating Chemistry Symposium 2006

Shisei Goto and Hitomi Hamada…(76)Introduction of Research Laboratories(56)National Institute of Advanced Industrial Science and Technology,…(82)

Biomass Technology Research Center, BTL Catalyst Team
Research Report(Original Paper)
The Development of New Extensible Paper for Heavy Duty Sack that Helps Material Saving
Kiyoshi Saitaka, Nobuhiro Hatoh, Hideichi Kawasaki and Toshimi Satake…(86)Pulp and Paper Mills in Japan(64)―Kantoh Mill（Katsuta Division）, Hokuetsu Paper Mills, Ltd.―

Hokuetsu Paper Mills, Ltd.…(95)Committee report…(03)

Essay on Intellectual Property…(84)

Coffee break…(85)

Papyrus…(101)

Industry News(Domestic and International)…(104)

List of Titles in Foreign Journals Received by JAPAN TAPPI…(117)

List of Patents issued and Laid―open Publication…(119)

Price list of Domestic Logs and Wood Chips by District…(126)

Wholesale Price list of Papers at Tokyo Trade Center…(127)

Other Monthly Statistics…(129)

News from the Association…(131)

2006年12月

紙パ技協誌[プリント用ページ]
Review of Paper Coating Technologies
Koji Okomori
Pulp and Paper Research Laboratory, R&D Division, Nippon Paper Industries Co., Ltd.
Production of coated paper has been increased since it was invented, and eﬃcient production has been also pursued by means of increasing
speed, widening wire of paper making machines and etc. From the point of view of economy and saving natural resources, coat weight and basis
weight are required to be decreased without lowering coated paper quality. Paper coating technologies including coating methods and materials
have been evolved to meet these demands.

Recent Trends on Coating Color and Its Latex
Hisashi Matsui
Polymer Research Laboratories, JSR Corporation
Recent trends and information on coating color and its latex are described. They are investigated into cost reduction, quality improvement
and productivity improvement. On cost reduction, increasing content of calcium carbonate and reducing the binder content are proceeding byusing improved latex. On quality improvement, brightness, paper gloss and printing gloss is improved. For the improvement, contents of finekaolin, fine calcium carbonate and fluorescent dye are increased and plastic pigment or latex giving hard ink set-off is used. On productivity
improvement, coating speed and coating solids content are increased. Increasing content of calcium carbonate and reducing content of starch
are advanced. And it is required for latex to be non-adhesive and have good fluidity.
Under these trends, following two kinds of latex are wanted. One is latex which gives stronger pick resistance and better runnability. Anotheris latex which gives better printing gloss. The improvement of the former has been advanced by small particle size and control of particle
morphology, molecular weight and cross-linking of polymer. The latter has been improved by polymerization method of acrylonitrile andcontrol of particle morphology.

Recent Coating Color Preparation System
Hidehiko Yamazaki
Metso-SHI Co., Ltd.
Metso's equipments for coating color preparation covers the material receiving equipments to the surroundings of coater heads. Especially, inthis paper, modern coating color preparation processes, which enable cost effective and environment-friendly production as well as the
production with excellent quality, are introduced.
For color preparation, batch type methods are usually well-known and widely used. Here, newly developed continuous method (GradeMatic),pressure screen (OptiScreen) in color supply system, deaeration equipment (OptiAir), on-line color measurement system (ColorMat), etc., aredescribed. In addition, coating color recovery system (OptiCycle) is described.

The Latest Technology and Trends in Coating Pigments
Chris Nutbeem
Pigments for Paper, Imerys Minerals Ltd.
Paper and paperboard coatings have become increasingly more sophisticated in order to meet the advertising world's need for better visual
image. This together with machinery advances has driven significant pigment developments over the past 20-30 years. For the most partdevelopment has proceeded at an evolutionary rather than revolutionary rate, but in the past 10 years we have seen marked increase in the rateof new pigment developments and a dramatic reduction in the shelf-life of existing pigments.
However, there are now signs that the paper industry is changing in response to ever increasing cost pressures and at best ﬂat paper pricing.
Although going forward we are still projecting significant growth in printing and writing paper grades and a consequential increase in pigment
demand especially carbonates, it is likely that the way in which pigments, especially high value pigments, are developed and used will change.

The focus now is very much on how pigments can be used as part of an application concept to oﬀer value to the paper maker. New pigments
are increasingly being developed to work concurrently with other pigments in multi-pigment application concepts. Understanding how
pigments influence coating structure in multi-pigment systems is essential if performance and value are to be maximized and it is clear that
there are synergies there to be exploited. Most notably it is apparent that the combination of platey kaolins with engineered carbonates is a
powerful tool for the paper maker to either adjust quality or generate value through reduction of basis weight or replacement of expensive
opacifiers or glossing additives.

Operating Experience : No.1 Coating Machine at Ishinomaki Mill
Toshihiko Nishikawa
Ishinomaki Mill, Nippon Paper Industries Co., Ltd.
No.1 coater machine in Ishinomaki mill has started producing coated paper since 1981 as an oﬀ-machine coater. Currently it produces 330
ton per day off-set printing paper and gravure paper.
No.1 coater machine runs with very high eﬃciency and has achieved 97.3%, the top rating eﬃciency among the all oﬀ-machine coaters in
Nippon paper.
This paper reports the No.1 coater machine operating experience, including the rebuild recently conducted.

GelView Sensor to Optimize the Coater Drying System
Junichi Masuda
Pulp & Paper HPS, Honeywell Japan Inc.
Honeywell developed the new sensor technologies of the measurement and control, which will be applied for the area from wet part to dry
end. These technologies have been launched from the last year in Japan. The GelView is the one of these new technologies and focusing on thecoater part.

The GelView provides the solution for measuring the coating consolidation throughout the drying process and can oﬀer

monitoring the coating consolidation progress and profiles that could not be expressed by any sensors before.
The solution of the binder migration etc. that is the problem of coated paper and the improvement and the stabilization of the quality can beattempted by this technology. Moreover, it comes to lead to an appropriate reduction in dry energy by the control or the production increase of
the product.
The contribution to a new paper manufacture technology by this technology can be expected.

Operating Experience : No.5 Coating Machine at Hachinohe Mill
Masato Shiraishi
Hachinohe Mill, Mitsubishi Paper Mills Limited
Hachinohe mill established since 1966 has ﬁve coaters and two of them are on-machine coaters. No.5 blade coater has been operated since1988 and the fastest actual operating is 1,575 m/min. It produces about 650 ton of coated paper per day.
In this report we refer to three operative and technical problems and solutions to archive faster operation of No.5 coater.
1)Technology of splicing wide rolls on high speed operating
2)Material and dimensional optimization of blade3)Renewal of quality monitoring and controlling system
Furthermore two new technical topics are introduced.
4)Development of process technology for 2,000 m/min operation5)Application of CFD (Computational Fluid Dynamics) to coating process

Influence by Coating Blade on Coating Machine Operation
Jerome MichautAsia Marketing, BTG Eclepens S.A.
Takuya Maekwa

BTG Div. Spectris Co., Ltd.
Due to machine speed-up, coating with blade became the most popular coating operation in the last decade. Position of the blade tip incontact with paper & coating color determine the final coated paper surface quality and also machine runnability. The determination of theright settings, blade tip material and blade design is the key of success. The advantages of using High Performance blade are a slow wear of theblade tip, that allows keeping blade tip shape constant and then to stabilize coater conditions, to enhance coated surface quality in usingmaterial that perfectly fit coating color peculiarity. Determination of the right mode of running (bent or stiff), the proper blade tip material andblade characteristic, and the optimized blade holder settings provide stability in both quality and productivity.

Operating Experience: PM8 On-machine Coating at Niigata Mill
Kazuhiro Takasumi
Niigata Mill, Hokuetsu Paper Mills, Ltd.
PM8 in Niigata mill has been in operation since 1998, and this machine has the biggest productivity of coated paper in all our mills.
In December 2001, the third-press was remodeled into shoe-press. As a result, the productivity was improved signiﬁcantly.
In this report, I would like to introduce the outline of the on-line coater part and the latest experience of the operation.

A report on International Paper and Coating Chemistry Symposium 2006
Shisei Goto
Nippon Paper Industries Co., Ltd.
Hitomi Hamada
National Printing Bureau
International Paper and Coating Chemistry Symposium (PCCS) 2006 was held in Stockholm during June 7th to 9th, 2006 under coorganization of KTH, STFI and YKI. PCCS dealt with fundamental and practical researches on wet-end and coating chemistry. The number ofparticipants was around 220 including 22 delegates from Japan. The programs had 10 sessions featuring 90 oral presentations including 19
invited lectures and 17 poster presentations. Trends of presentations were summarized and notable researches were cited in this report.

The Development of New Extensible Paper for Heavy Duty Sack that Helps Material Saving
Kiyoshi Saitaka
Product Laboratory, Nippon Paper Industries, Co., Ltd.
Nobuhiro Hatoh
Communication & Industrial Paper Sales Div., Nippon Paper Industries, Co., Ltd.
Hideichi Kawasaki
Asahikawa mill, Nippon Paper Industries, Co., Ltd.
Toshimi Satake
Nippon Seitai Co., Ltd.
Multi wall kraft paper sacks used to have more than two layers to prevent from break. Recently the layers of the paper sacks and the basis
weight of the kraft paper have been reduced to minimize the cost and the material. However, the strength of the paper sacks has come to thelower limit because of the reduction. For the further material saving, the stronger and tougher sack paper with the same amount of material isneeded. Nippon Seitai and Nippon Paper Industries have developed the new extensible paper suitable for multi wall paper sacks. The elongationof the extensible paper is much higher than that of the normal kraft paper and the ordinary extensible paper 'Clupak'. It is found out that the
new extensible paper is much tougher to break because it absorbs the impact of dropping or thrusting by stretching. Also as the new extensible
paper is made of 100% soft wood kraft pulp and the wood is mostly from the periodic thinning, it is recyclable and environmental friendly. In
this paper, we would like to show the significant characteristics of the newly developed extensible paper, and the material saving example ofmulti wall kraft paper sacks by using the extensible paper.
Keywords: Extensible paper, Material saving, Multi wall kraft paper sack, Elongation, Recyclable,

Periodic thinning