JAPANTAPPI JOURNAL 9

September 2024

V ol. 78, N o. 9

CONT ENT S
P a per m a k ing T echnolog y Ⅰ
1thReport of the 28 Paperm aking T echnology Sem inar……Paperm aking T echnolog y Com m ittee， JA PA N T A PPI

4

T he Introduction of Latest T echnolog ly and Process Control for Stock
Preparation ……Rei N agaoka

7

Recent T echnical Developm ent of Internal Sizing A gent……Shunsuke Irie

15

Functionality of HY M O W et End Sy stem and Latest T echnolog y―Reducing the Environm ental Im pact of Paper M aking by Coag ulants, Retention andDrainage A ids―……N atsuhiko Sato21

Basic T echnology and Latest T rends for Solution to Pitch Problem s……Y uken Ishikaw a27

Solution for Operation Stabilization by A naly sis of W et end M onitoring Sensor
and Defect Inform ation ……Hiroy uki Otaka and M isa N om aT opics & I nf or m a tion

32

W ashing Ef fect of Pow er Com bi Cleaner 2.0―Equipped w ith A ir V enturi Self-W ashing System ―……K azuki Hasegaw a and Claus R obberts

37Operation Experience of ProJet’s Dryer Fabric Cleaner（ Pow erCom biCleaner 2.0）……Shuhei Senju

43

A ikaw a T echnolog y Contributes to Safety M easures and Labor Sav ings in thePaperm aking Process M atter Rem oval T echnology in the Paperm aking Process……T suyoshi Y oshino

48

Productivity Im prov em ent and Skills T ransfer Using Sm artPapyrus®
―T he Latest T rends and F uture Dev elopm ents in Defect Im ag e Classif ication Sy stem s―……T akay uki Shim o54

A BB Digital T ransform ation Solution―Industry 4.0 V isibility A pproach for Ref in ing and W et End Control―……Hirom ichi Y oda

63

77th JA PA N T A PPI General M eeting

03
62
79

Com m ittee report
Cof fee breakPapyrus

85
89
96
97
99

Industry N ew s（ Dom estic and International）
List of Patents issued and Laid-open Publication
Price list of Dom estic Logs and W ood Chips by District
Other M onthly Statistics
N ew s from the A ssociation

2024 September JAPAN TAPPI JOURNAL
Vol.78, No.9 Abstracts

The introduction of latest technologly and process control for Stock Preparation
Rei Nagaoka
Voith IHI Paper Technology Co., Ltd.

Traditionally, timer control has been mainly used in the stock preparation process for processing reject
and adjusting the amount of feed.
This is because, until now, it has been difficult to obtain information on fibers within the system andreject to be discharged as metadata, and it has not been possible to directly feed back information within
the system to the control.
Recent improvements in sensing technology have already made it possible to treat this information asmetadata.
The Voith paper focuses on traditional control methods for stock preparation and proposes the conceptof 'Autonomous Stock Preparation', which automates as much as possible of these adjustments.
This paper introduces some component products to realize 'Autonomous Stock Preparation'.

Recent Technical Development of Internal Sizing Agent
Shunsuke Irie
Research & Development H.Q. Forestry Chemicals Development Dept.
ARAKAWA CHEMICAL INDUSTRIES, LTD.

This paper focuses on the internal sizing agents such as rosin, alkyl ketene dimer (AKD), andalkenyl succinic anhydride (ASA) , which are added for paper sizing, and outlines the basics,
mechanisms, and effective usages. In the recent operation of environmentally friendlypapermaking, it has become difficult to express the original function of the internal sizing agent.
Therefore, we have developed and sold a new product, SPCA-956, with the aim of addressing
issues such as performance degradation and machine staining caused by resin hydrolysis, as wellas the risk of soaring prices of rosin. In the end, we believe that we were able to share informationon the positioning of various sizing agents in various papermaking conditions and the best choice.

Functionality of HYMO Wet End System and Latest Technology-Reducing the Environmental Impact of Paper Making by coagulants, retention and drainage aidsNatsuhiko Sato
Shonan Research Center, Performance Chemicals Development Group, HYMO Corporation

In recent years, induced by the SDGs, reduced impact on the environment as well as cost
reduction became more and more important. Therefore, paper mills are promoting the use of lowgrade wastepaper, efficient chemicals, and a reduction in energy consumption for paper
manufacturing. Among these, the use of low-grade wastepaper lead to an increase in short fibersand fillers and lead as well in increased amounts of pitch components. As a result, increasing
amount of short fibers tend to decrease the retention rate on the wire and impede drainage. Inaddition, an increase in the amount of pitch components causes increase web breaking and othertrouble in the papermaking process. In this situation, coagulants, retention and drainage aids aregetting more and more important. The role of retention aids is to efficiently retain fines and fillers
on the wire. Drainage aids shall improve drainage and to reduce steam consumption. Along with
their roles, coagulants, retention and drainage aids provide various functions that contribute to theSDGs and result in a considerable reduction of the environmental impact. As for the specificfunctions of these chemicals, they shall enhance an effective use of fibers and fillers, as well as otherpaper chemicals, improvement of wastewater treatment, reduction of energy consumption, andimprovement of the paper quality. Furthermore, we recently propose that it is important to optimize
how to use the chemical products, such as the addition point, the addition method, and thecombination of chemicals to maximize their effectivity by making use of the chemical characteristicsof coagulants, retention and drainage aids. We call this system the HYMO Wet End System. For
example, if we focus not only on the retention and drainage effect at the wire part, but also on theretention of other wet end chemicals, such as sizing agents, strengthening agents, and dyes, it isnecessary to consider the addition point. In this case, the recommended addition points are mixingchests, machine chests, and stuff boxes located close to the addition points of sizing agents,
strengthening agents, and dyes. In addition, we have recently developed a new drainage system,
which system is a combination of high-molecular-weight anionic chemicals and special cationicchemicals added in that sequence. We are aiming at contributing to the SDGs and the reduction ofenvironmental impact and cost by applying coagulants, retention and drainage aids and by making
effective use of the functionality of the HYMO Wet End System.

Basic Technology and Latest Trends for Solution to Pitch Problems
Yuken Ishikawa
Research ＆ Development Dept., Nissin Kagaku Kenkyusho Co., LtdIn recent years, the paper industry has been faced with the problems of increased pitch sticky problems
due to an increase in the amount of pitch in recovered paper caused by a decline in the quality of it andan increase pitch in pulp.
One of the methods used to prevent pitch problems is the use of pitch sticky control agents. We areworking to solve pitch problems throughout the entire process by using the appropriate agent for eachprocess, and we call NISSIN Pitch Control Method (NISSIN-PCM).
Conventional pitch evaluation methods could measure the total amount of pitch or evaluate coarse
pitch, but could not evaluate fine colloidal pitch. Because white water and pulp slurry contain many
components other than pitch, flow cytometry has low measurement accuracy.
We visualized the pitch by image analysis using a fluorescence microscope, which enabled us toevaluate fine colloidal pitch. Using this method, when a pitch sticky control agent was added to the pulp
slurry, a decrease in coarse pitch and an increase in fine pitch were observed in the filtrate. Thus, it wasconfirmed that the pitch control agent detached the fine colloidal pitch from the pulp and dispersed it in
the liquid.
Combining these results with conventional pitch evaluation methods may lead to the development of
new evaluation methods and pitch sticky control agents.

Solution for operation stabilization by analysis of wet end monitoring sensor and defect information
Hiroyuki Otaka and Misa Noma
Maintech Co., Ltd. Fuji Office

The number of problems caused by machine deposits has been increasing due to the worsening of theraw material of pulp situation. In addition, it is becoming increasingly difficult to respond to machine
dirt deposits in a timely and appropriate manner due to the decrease in the working population at
production sites and the retirement of experienced employees. To address this issue, we are developing"SmartPapyrus®", a system to prevent defects and sheet breaks by visualizing machine dirt deposits
using IoT, analyzing it using artificial intelligence, and using machine dirt deposit prevention technology.
In addition, we are currently installing sensors at multiple locations in the stock preparation line andconducting continuous online measurements to identify the causes of defects classified by
SmartPapyrus® 1.0.
In this report, we will introduce on the analysis results using sensor data from the stock preparationline for the defects and sheet breaks that have been classified by SmartPapyrus® 1.0.

Washing effect of Power Combi Cleaner 2.0-equipped with Air venturi self-washing systemKazuki Hasegawa and Claus Robberts
ProJet Japan Corp, ProJet B.V.
ProJet B.V. is a leading company specialized in High pressure water fabric cleaning systems. Since its
establishment in 1998, We have delivered over 1,000 units fabric cleaning systems to paper mills,
nonwoven fabric factories, and food processing plants worldwide. In Japan, as of 2023, we have supplied
over 80 units for wire part, press part, and dryer part for paper mill.
In particular, paper mills have a high re-utilization rate of the used paper, a canvas cleaning systemthat consistently achieves high cleaning effectiveness and stable operation is demanding in order toprevent product defects, paper break, and improve productivity. ProJet B.V. has been continuously
innovating of cleaning technology since its founding. In 2021, we released the "Power Combi Cleaner
2.0", which a double air venturi-type cleaning head that maximizes cleaning effectiveness and mistcollection performance to the utmost limit. Further we are equipped as standard patented technology"air venturi self- cleaning system" to prevent clogging of venturi tube, which is biggest weakness of air
venturi type cleaner.
Here by, let we introduce the effects and features of the "Power Combi Cleaner 2.0" and "Air venturi
self- cleaning system".

Operation Experience of ProJet's dryer fabric cleaner (PowerCombiCleaner 2.0)
Shuhei Senju
Saga Mill,Oji Materia Co.,Ltd.

Saga Mill, Oji Materia Co., Ltd. has three paper machines, Machine 1, Machine 4 and Machine 5. It isa sustainable mill that produces linerboard, medium and special paperboard from almost 99% of wastepaper.
Sticky from waste paper has been increased recently while customers are focusing more on paper
defects. Sticky is one of the causes of sheet breaks and paper defects as it accumulates on machine fabrics.
So actions such as sticky control chemical dosage and screen slot size decrease were taken, but they can’t
solve the issue completely. It is an urgent task to take effective action against sticky defects due tocustomers’ tough view especially to linerboard.
This article shows a case about dryer fabric cleaner upgrade that led to sticky defects reduction andsteam consumption improvement in Machine 5 that produces linerboard.

Aikawa technology contributes to safety measures and labor savings in the papermaking process matter
removal technology in the papermaking process
Tsuyoshi Yoshino
Design Department / AIKAWA IRON WORKS CO.,LTD.

The manufacturing workforce in Japan has been around 10.5 million people since the 2010s. However,
due to the aging population and low birth rates, there has been a declining trend in young workers,
leading to a long-standing labor shortage. The paper industry is facing a similar situation and has been
taking measures such as introducing equipment and automation to achieve labor savings. Furthermore,
safety measures have been improving year by year to ensure the safety of workers, minimizing the risksof accidents and injuries. In such circumstances, our company designs, manufactures, and sells
equipment that contributes to safety and labor savings. This article introduces safety measures andlabor-saving technologies in the papermaking process.

Productivity Improvement and Skills Transfer Using SmartPapyrus®
-The Latest Trends and Future Developments in Defect Image Classification SystemsTakayuki Shimo
Technology Development Team, MAINTECH CO., LTD Fuji Technology Development Center

In recent years, the number of problems caused by machine deposits has been increasing due to theworsening of the quality of waste paper. In addition, it is becoming increasingly difficult to cope withmachine deposits in a timely and appropriate manner due to the labor shortage at production sites andthe retirement of experienced employees. To address this issue, we are developing "SmartPapyrus🄬", asystem to prevent defects and sheet breaks by visualizing machine deposits using IoT, analyzing it using
numerical analysis, and using machine deposit prevention technology. For the next step, we developed
SmartPapyrus🄬 1.0, a system that uses AI to automatically classify defects detected by Web Inspection
System(WIS) based on their origin. SmartPapyrus🄬 1.0 makes it possible to determine in real-time
when and where in the process so many defects have occurred.
To date, SmartPapyrus🄬 1.0 has been installed on many liner machines, and have shown amazing
performance, including real-time evaluation of the effectiveness of operator’s actions for defects
countermeasures and their results, as well as investigation for specific defects to respond to complaints
from the end user.
On the other hand, similar problems are occurring not only in liner machines but also in white board
paper machines.
Since the quality requirements for white board paper are much higher than those for liner, themachines are operated with higher sensitivity of WIS so that even small defects of 1 to 2 mm or less canbe detected.
However, WIS can detect over 2,000 defects per each jumbo roll, including not only small defects, butalso noise.
We have up-graded SmartPapyrus🄬 1.0 system so that it can solve these problems.
In this report, we show how the system improved the productivity of white duplicate board
manufacturing machines.

ABB Digital transformation solution-- Industry 4.0 Visibility approach for refining and Wet end control
Hiromichi Yoda
Division manager, Process Industry Division, ABB K.K.

Currently, industry got strong pressure from the market because Japan government announced
carbon neutral industry by 2050. In Japanese industry, especially material industry, there are several
serious potential issues like lack of human resource due to less attractiveness for young people,
retirement of baby boomer and the technical transfer. On the other hand, there are bright future in paperindustry because paper is excellent material for plastic reduction and new functional material, Cellulose
Nano Fiber.
ABB started following four approaches to cooperate with customer to solve facing issues.
1) Reliable and high-performance online measurement for Refiner, Wet end control
2) Cutting-edge fiber analyzer for new material development3) Speedy, Safety and high precise paper testing machine
4) High speed, high precise and reliable automated paper testing machine
In the paper, overview of ABB digital transformation solution and some actual results are described. You
can understand how ABB L&W online measurement is reliable and how to utilize the measurement
data for process optimization.