twogether
Paper Technology Journal I Special Issue Specialty Papers

Leading technologies for specialty papers I Voith Paper offers
customized solutions from banknotes to cigarette papers

Special Issue
Specialty Papers

Contents

4 Good growth forecasts: Specialty
papers from banknotes to wallpapers.

twogether
Paper Technology Journal I Special Issue Specialty Papers

39 Unique project: Largest glass fibre plantin the world built in the US.

Masking Tape

4 Specialty papers – an expanding

34 Décor paper machine converted

market worldwide

to produce masking tape

10 Interview: Dr. Müller and Dr. Trefz
about the specialty paper market

Décor paper
14 New and proven technologies
for décor paper and overlay
paperSpecial Issue I 2008 I Voith Paper I twogether

specialty papers on a cigarette.

ReportLeading technologies for specialty papers I Voith Paper offers
customized solutions from banknotes to cigarette papers

Special Issue
Specialty Papers

44	Paper for flavor: The effect of three

Wet laid nonwovens
38 Wet laid nonwovens technology –from the tea bag to roofing
39 The largest glass fibre mat facility
in the world
42 Conversion of the PM 6 paper

21 Laminate manufacture using

machine at Neenah Lahnstein

Voith Paper components

43 HydroFormer pilot line in Düren

2

Cover picture
Tea bag paper is a special paper
produced by the wet laid nonwoven process.
You can learn more about wet laid
nonwoven papers on page 38 ff.

Thermo paper

Paper for cigarettes

24 Partners in thermo paper market

44	Three specialty papers forleadershipproduction of one filter cigaretteLabel paper

Products

28 Curtain coating is also used for48	Quick web feeding after a breaklabel and flexible packing papersof the press section
50	Reliable feeding with RopeRing

Banknotes
30 Surface sealing makes banknotes last longer

2

Glossary51	Little paper lexicon

Special Issue I 2008 I Voith Paper I twogether

EDITORIAL

Kurt Brandauer,
President Paper Machines.

Dear customer, dear reader,Specialty papers are both fascinating

also read about the latest advance-and versatile. This special issue ofments on making banknotes more

our “twogether” magazine is dedicatedcounterfeit-proof, as well as theentirely to this paper sector. Voith

impact of cigarette paper on the taste

Paper is heavily involved in the produc-of a cigarette.

tion of specialty papers and for
decades has been developing new

In addition, we report about new tech-technologies and products to enablenologies: such as, curtain coating.

its more efficient and higher quality

Voith Paper has refined the coating

manufacture.

process so that it can also be used
for labels and flexible packing papers.

Our title story provides an insight into
the current market situation of the nineThis insight into current developments

specialty paper segments, and thisin specialty paper production is pep-

special magazine issue is structured bypered with “brief cultural histories.”

type. Overall, specialty papers currently

You will find out, for example, about

represent a lucrative growth market

the significance of the self-extingu-

worldwide. As a leading vendor ofishing cigarette and how adhesive

specialty paper machines, we aretape was invented.

dedicated to this market. Our comprehensive know-how allows us to meetthe specific requirements imposed by

Have an interesting read!

each kind of specialty paper.
First of all, décor paper. You will readhow décor paper is produced andwhat must happen to get laminate

Kurt Brandauer

sheeting into the DIY stores. You can

On behalf of the Voith Paper TeamSpecial Issue I 2008 I Voith Paper I twogether

3

REPORTREPORT

Specialty papers –an expanding market worldwide

REPORT

Search through your wallet and you will likely
come up with several kinds of specialty papers:
The banknote paper has been produced underthe most stringent security measures on a specialty
paper machine. Your fuel receipt is printed onthermo paper, your ID card on special security
paper and your passport photo on photographic
paper. Specialty papers are extremely versatile
and account for the strongest growth markets inthe paper industry.

6

Special Issue I 2008 I Voith Paper I twogether

REPORT

Good growth prospect

Paper machines not only produce
mass paper, they also make paper
for tea bags and gasoline filters,

Every year more than 19 million me-

banknotes and bottle labels, wallpa-

tric tons of specialty papers are used

per and décor coverings for furniture,– and this figure is likely to increase.

and backing paper for vinyl

For security papers the annual growth

wallpapers.

in consumption is almost five percent. The demand for established

There are about 2,900 types of spe-

specialty papers is growing steadily,

cialty paper worldwide that can be

and the development of new varieties

subdivided into nine segments de-is running in high gear. One current

pending on application and market

research project, for example, is inve-

sector. For example, as label and re-stigating papers for intelligent pro-lease papers have the same field ofduct labeling. This kind of marking

application they belong to the same

could be used on supermarket shel-segment, although the manufacturingves, for example, to show how fresh

process and quality criteria are diffe-

the meat in the packaging actually is.

rent.

In up-and-coming economic regions
the demand for filter papers is increa-

Other segments are décor paper

sing, which explains why there isand overlay, wet laid nonwovens andabove average growth forecast for

filter papers, photographic and digital

this segment, as well.

imaging paper, non-carbon paper,
thermo paper, security paper and

The group with the highest consump-

paper for cigarettes. Lightweight, thintion is label and release papers at ap-

printing papers and MG paper belong

proximately three million metric tons

to the ninth segment, miscellaneous

worldwide. Almost all specialty paper

paper types.

segments exhibit positive growth

Specialty papers – annual growth up to 2010/11
Checkout receipts are printed
on thermo paper.
Banknotes & security paper
Décor paper
Labels & release papers
Wet laid nonwovens & filter papers
Thermo paper
Photographic & digital imaging paper
Paper for cigarettes
Non-carbon paper
-5

-4

-3

-2

-1

0

1

2

3

4

5

Annual consumption growth rate [%/a]Special Issue I 2008 I Voith Paper I twogether

With the exception of non-carbon
paper, specialty papers exhibit
excellent growth potential.

7

REPORT

Memories on paper:
Worldwide consumption ofphotographic and digital imaging
paper is around 1.3 million tons
per annum.

8

rates. Only non-carbon papers show

sumption is in the ninth segment, ofa downturn, although they currently

miscellaneous specialty papers.

represent the second largest segment. Every year a million metric

The fact that the specialty paper seg-

tons each of thermo paper andment accounts for only a total of five

photographic and digital imaging

percent of total global paper con-

paper are produced. Wet laid non-sumption might lead to the view thatwovens and filter papers total a hefty

these paper types are unappealing in

1.5 million tons worldwide. Aroundbusiness terms. However, compared

750,000 tons each of cigarette paperwith conventional papers, the spe-and décor paper are consumed.

cialty papers have a higher added-

Banknotes, commercial and security

value with equivalent price level:

papers account for almost 200,000

Specialty papers account for 10 per-tons per annum. The remaining con-cent of the revenue from paper sales.

Special Issue I 2008 I Voith Paper I twogether

REPORT

Cost efficiency in small batches

segment, as well as these machines'
versatility to also produce low basis

The peculiarities of specialty papers

weight printing papers – such asmean that the paper production ma-

thin paper for bibles.

chines have to meet stringent requirements. Generally, specialty papers

Voith Paper has specialized not

are produced on narrow paper ma-

only in paper machines for masschines to minimize the change-overpapers but also in the manufacture

times and broke when switching toof specialty papers. Voith is active

different grades of paper.

in all segments. Research anddevelopment in specialty papers is

It is perfectly possible to have pro-being pushed ahead in our researchduction batches of only one metriccenters in Heidenheim, Düren andton. For example, there are more

Ravensburg.

paper machines producing securities
than production plants for thermo
papers, as the thermo papers areproduced on wider, quicker paper
machines due to their larger production batches.
Contact
By the way, the majority of the

Dr. Jens Müller
jens.mueller@voith.com

approximately 600 specialty paper
machines worldwide produce paper
for cigarettes. This is due to the historical market structure of this paper

Distribution of specialty papers according to number of paper machines (total around 600)

Décor paper

Labels & release paper~ 19 %~ 8%
Banknotes &security paper

Miscellaneous
specialty papers~ 9%~ 20 %~ 11 %

Photographic- &digital imaging paper~ 5%

Non-carbon paper

Tea bag paper is manufactured
using the wet laid nonwoven
process.

~ 3%
Thermo paper~ 25 %
Paper for cigarettes

Special Issue I 2008 I Voith Paper I twogether

9INTERVIEW“Our know-how supports			
the success of ourcustomers in their segment!”
Dr. Jens Müller, Senior Vice President for Products & Services
in the Voith Paper Fiber & Environmental Solutions Division

The specialty paper market imposes stringent requirements

Hand in hand with thecustomer to achieve market growth
The manufacture of specialty papers demands extensive know-how
and many years of experience. Voith Paper produces paper machines
for all kinds of specialty papers. In this interview, Dr. Jens Müller and
Dr. Michael Trefz, experts on specialty papers at Voith Paper, talk about
current growth potential and the effective application of products.

10

INTERVIEW

For almost five years Dr. Jens Müller was divisional manager for specialty papers at Voith Paper.
On October 1, 2008 he was appointed Senior Vice President of Products & Services in theVoith Paper Fiber & Environmental Solutions Division. Dr. Müller's previous task will be assumed by
Dr. Michael Trefz, up to now Head of Coating Technology. This means that Voith Paper is bringing
the specialty paper and coating areas closer together, with the goal of achieving even more efficiency
for our specialty paper clients.
twogether: Mr. Müller, on the whole,acturers are converting their graphic

This is why Voith Paper has the lar-specialty papers are an up-and-co-

paper machines to produce specialty

gest number of installed referencesming market. What trends do you see

papers. Although Asian countries havefor specialty papers worldwide. Thisfor the near future?

up to now generally produced com-market is very important to us, andmodity paper, such as graphic paper

we work with all paper plants, re-Müller: The specifications for theor packaging paper, I observe steadygardless of their production capaci-manufacture of specialty papers are

growth here, too.

ty and machine size. Specialty

very sophisticated and specialized.

paper machines in particular haveThis is why there are many highly

twogether: In the papermaking in-complex specifications that have to

specialized companies, often family

dustry Voith Paper is often regarded

be met. Very often the challenges

owned, that focus on just a few

as a big company specializing in large

and the opportunity for extra added

kinds of paper. This is not likely topaper plants. What expertise do you

value are to be found in the coatingchange. Expertise in the manufacture

have to support specialty paper ma-

technology. This is why I amof specialty papers continues to benufacturers?

absolutely delighted that with thefound mainly in Europe.

appointment of Dr. Trefz we will
Müller: Our engineers specialize inbe bringing the specialty paper

In recent years we generally observe

specialty paper machines. We haveand coating technology segmentsthat due to the expanding market insystematically dedicated ourselves to

far closer than was previously the

specialty papers some paper manuf-

this sector since our inception.

case.

Special Issue I 2008 I Voith Paper I twogether

11

INTERVIEW“It is also one of our aims to make			
paper manufacture increasingly
environmentally compatible and		 cost efficient. That applies inparticular to the processing of			high-quality specialty papers.”
Dr. Michael Trefz, Vice President for Specialty Papers at Voith Paper

Specialty paper manufacturers should focus on reducing their consumptionof a number of raw materials: Energy, water and fibers.

Trefz: Our customers benefit from ourprocess and save the cost of expen-

they can make their production more

extensive know-how. However, above

sive coating color, while the quality

efficient and more profitable. What do

all we take into account what ourof the coating improves. In this con-

you recommend they do?

customers need and want. Together

junction I would also like to mention

we are navigating the potentials of thethe HydroFormer, an inclined wire for-Müller: They should focus onrespective paper machines, preparing

mer that has proven effective in the

reducing their consumption of raw

precise budget plans and carrying

manufacture of wet laid nonwovens

materials:

out rebuilds. What is crucial is that inand highly porous, long-fiber filter pa-

our case everything comes from one

pers. This is an ideal product for the

Energy, water and fibers. In recent

source, and we can access a solid

expanding market in this sector. Op-

times the issue of energy in particularbase of knowledge and experience.

portunities include automotive filters,

has become extremely important. We

That is our “powerhouse”. We use ourcoffee filters, glass fibers as a basehave to drastically reduce our previ-

products in a needs-based way andfor bitumen boards and peel-off wall-

ously high energy consumption inposition new components to the best

papers, which are a mixture of longpaper manufacturing. We have to re-advantage of our customers.

vinyl fibers and paper fibers. However,duce the use of fibers and replace

it is not just individual products thatthem with less expensive alternatives.

twogether: Can you give an example

are important but improvement ofRecycled paper is not a realistic

for the effective application of products?

the entire process. For example, we

option, as specialty papers havetailor the headbox and WEP (wet end

to meet stringent requirements, i.e.

process) to one another.

automotive filter paper in terms of

Müller: We always make sure that
quality and process stability are infiber length. It is absolutely essential

tune. For example, the curtain coater

twogether: Many specialty paper

to incorporate the treatment of water

can simplify the paper manufacturing

manufacturers are considering how

and waste material into our planning.

12

Special Issue I 2008 I Voith Paper I twogether

INTERVIEW

Dr. Michael Trefz, assumed responsibility for Specialty Papers on October 1, 2008.

Trefz: Voith Paper has established amarket growth. And we go there, too.

have commissioned a new system forseparate business unit for the deve-

For example, the demand for gasoli-

one-sided smooth special packaging

lopment of appropriate products forne filter papers in China and India ispapers. In the plug wrap and cigarette

this purpose: Voith Paper Environ-on the rise due to the increasing

paper sector, two of the machinesmental Solutions. In addition, we offer

number of cars on the road and the

supplied by us to Asia went into pro-our customers the opportunity toemerging automobile industry in the-duction this year.

carry out trials in our Paper Technolo-

se countries. We have sales engi-

gy Center (PTC) in Heidenheim

neers all over the world visiting andtwogether: Mr. Trefz, what goals andand in the HydroFormer pilot line inadvising our customers in person.

visions do you have for the future?

possibilities for their specialty paper

Trefz: We can mention quite specifi-

Trefz: We want to continue to deploy

machines.

cally some interesting startups andthe entire spectrum of Voith Paper and

Düren to verify specific optimization

orders this year. In the décor paper

our know-how to benefit our customers

twogether: What is the current

sector we won the order to convert

in the best possible way. Our customers

order situation in your sector ofa photographic paper machine toshould have the opportunity to be thespecialty papers?

produce innovative décor papers.

market leader in their segments. WithIn Eastern Europe we are going toevery new project, our goal is to findMüller: As the specialty paper

equip a paper manufacturer with atailor-made solutions. It is also one ofmarket is an expanding one, the

new installation for producing one-

our aims to make paper manufacture

prospects are good. For specialty

sided smooth papers. The mostincreasingly environmentally compatible

papers investments take place inefficient machine for single-ply tea

and cost efficient. And that also applies

proximity to the market. This meansbag paper is now being designed inin particular to the processing of high-that our customers go where there isGermany. And in Scandinavia we

quality specialty papers.

Special Issue I 2008 I Voith Paper I twogether

13

There's a lot of			 paper in here!
You'd be surprised how much paper there is inyour home. Décor papers and overlay papers
are found in furniture surfaces, kitchen cabinet
panels and laminate flooring.

14

15

Décor paper

The MasterJet F/B Headbox delivers optimum performance in the décor paper sector

Enhance quality with new technologies
Compared with graphic paper grades, décor and overlay papers have very special properties and needappropriate production machines. Voith Paper has developed technologies that not only enhance thequality of these specialty papers but also make their production more efficient. This includes the
MasterJet F/B headbox and the new -EdgeModule edge feed-in system. Voith Paper's ModuleJet andthe DuoShake ensure a perfect profile and improved formation of the paper. Voith Paper installed thesetechnologies for a revamp at Munksjö Paper GmbH in Unterkochen. Since then the PM 3 has been oneof the most productive décor paper machines.

“It is in those often overlooked specialty paper niches where new				technological developments and trends can be spotted.”		Jan Lepper, Sales Engineer Specialty Papers, Voith Paper

Décor paper is used in the furnitureindustry for kitchen cabinet panels.

16

Décor paper

The PM 3 at Munksjö Paper GmbH in Unterkochen is one of the most productive décor paper machines.

Décor papers are characterized byced on a width of up to 2.6 meters.

the intensive workshop on headbox

very high, uniform dimensional stability.

However, the web width varies de-technology for décor papers.

This means that they have to havepending on the order specification,

Participants looked into the success-very good CD and MD profiles. Theyand it is not unusual to run webs on

ful Voith Paper installations at Köhler

need good smoothness on one sidewidths of only 1.6 meters for shortin Kehl, Munksjö in Unterkochen andfor good printability. Easy impregnabi-

periods. Even just this small selection

Felix Schoeller in Pensa.

lity and a high resistance to mechani-of particular features shows that

cal and chemical loads are further

the production of décor paper

In terms of the headbox, the turbu-

properties of décor papers.

necessitates special design andlence generation principle usingsophisticated machine concepts.

rectifier rolls (RollJet K) was long

Décor papers are produced in very

considered the measure of all things

small batches at a machine speed ofIntensive workshop on

in décor paper production. In recent

250 to 800 m/min. This means thatspecialty papers

years, however, the hydraulic head-grade changes are the order of thebox, particularly the Master Jet F/B

day. The grades differ mainly in terms

Recently Voith Paper has been invi-

developed by Voith Paper, has esta-of ash content and color, with theting industry experts to workshops toblished itself as the technologicallyresult that the total system has to be

discuss specific aspects of specialty

far superior solution. Consequently,

cleaned after every color change. To

paper manufacturing. As Jan Lepper,

this key element was the main topic

keep these cleaning times as short assales engineer for specialty papers,

at the décor papers workshop.

possible, the design of the entire sy-

observes, “It is in those often over-stem is focused on smallest possible

looked specialty paper niches where

To discuss these trends the workshop

volumes for piping and vats. The

new technological developments andparticipants also gained an insightnecessary extremely high opacity oftrends can be spotted.”

into Voith Paper's R&D activities. This

the papers is achieved with a highincludes the PTC (Paper Technology

proportion of titanium dioxide of up to

For example, experts from the décor

Center) in Heidenheim, where the42 percent. Specialty paper machines

paper industry gathered at Voith

latest developments are tested at thefor décor papers are generally produ-

Paper in the spring of 2008 to attend

large paper pilot plant. The décor

Special Issue I 2008 I Voith Paper I twogether

17

Décor paper

MasterJet F/B

DuoShake

EdgeModule

FI

For décor paper machines Voith Paper uses the MasterJet headbox in conjunction with the EdgeModule edge feed-in system to achieve
optimum fiber orientation at the web edge. The DuoShake shaker ensures a particularly homogeneous distribution of the fibers in the sheet.

paper manufacturers in attendance

ple also ensures minimal force trans-

MasterJet headboxes. With this Edge-

were impressed by the system's

mission to the machine foundations

Module, it is possible to adjust the vo-

research and investment potential,

by preventing the nozzle forces fromlumetric flow of the suspension at theeven if they did have a bit of a chuckle

being supported by the side walls.

edges of the headbox to an optimum.

about the paper machine speed:

When upper and lower lip undergo

The module thus allows the web edge,“2,400 meters per minute? We canthermal expansion, the geometry ofwhich is particularly critical for thismanage that too – on the winder!”the slice opening changes only

grade, to be controlled. The control

slightly. There is no need for a com-

range of the EdgeModules is up to two

Hydraulic headbox – provenplex heating system and heating

meters towards the machine center.

technology with new features

chambers at the headbox.

The main fiber orientation at the edge
can be adjusted by up to eight de-

In discussing the headbox, the custo-

In order to deflocculate the fiber sus-

grees. The EdgeModule technology

mer workshop was picking up a cen-

pension, the hydraulic headbox has tooffers advantages for all grades of pa-

tral theme. After all, for papermakers

generate turbulence. This is done by

per in which good fiber orientation is

it is considered to be the heart of thepassing the suspension through turbu-

demanded. The EdgeModule is usedpaper machine. Only by using a cor-lence pipes with escalating diameteron headboxes for fourdrinier, hybrid-

rectly designed, precision engineered

increments, the well known step dif-former and gapformer paper machines

and adjusted headbox, which applies

fuser. The resulting pressure shocks

and has already proven effective inthe suspension evenly onto the four-

generate high shearing forces, which

practice, including in décor paper pro-drinier wire, can important paper pro-deflocculate the suspension. The highduction.

perties be maintained - for example,

micro-turbulence in the MasterJet F/B

the CD basis weight profile, main fiber

headbox, allows optimum jet stability

ModuleJet guarantees optimum

orientation, homogeneous formationeven at high speeds. For the greatest

CD basis weight profileand flatness of the paper. The Master-

possible accessibility to the rear wall,

Jet F/B headbox is a modern, flexible

the distributor pipe and the upper lip

Another crucial factor in décor paper

design from Voith Paper. Thanks to its

holder of the MasterJet can be open-

production is controlling the CD basis

special ribbed design for upper lip

ed over the width of the machine.

weight profile according to the dilution

holder and table it does not need any

water principle. This principle is notcomponents over the machine width

The EdgeModule edge feed-in sy-

only applied for hydraulic headboxes,

apart from the upper and lower lip.

stem is an innovation for these paper

but also for the rectifier headboxes

The so-called C-clamp design princi-

grades and can be installed in newstill found in older machines. Here,

18

Special Issue I 2008 I Voith Paper I twogether

Décor paper

Voith Paper offers the ModuleJetconsistency differences generated bythis produces a far more homogene-technology, which is also ideal for

the ModuleJet controls.

ous distribution of the fibers in therebuilds. This dilution technology

sheet.

produces very good CD basis weight

High shake frequencies withprofiles with optimum fiber orientation

DuoShake(TSO – Tensile Strength Orientation),

Successful deployment at
Munksjö Paperaround 20 to 50 percent better thanA shaking unit is used for décor pa-that achieved using the slice adjust-pers to reduce the MD/CD ratio of

Several Voith Paper components havement method. In addition, the system

the breaking length and to improve

been installed at the same time into

ensures stable web run, good

formation. Voith Paper has developed

the PM 3 for décor paper at Munksjö

flatness properties and improved

the DuoShake, in which the vibrating

Paper GmbH in Unterkochen. Toge-

productivity. Following a grade chan-mass of the breast roll is counterba-

ther with the existing DuoShake, thege a substantially shorter settlinglanced with counterweights. This

MasterJet F/B headbox now ensures

time is also achieved.

prevents forces being transferred into

excellent sheet formation. The Ma-

the machine foundation and allows

sterJet F/B is additionally fitted with

The heart of the ModuleJet is special

larger strokes and higher shaking

an EdgeModule. The ModuleJetvalves, which inject low consistency

frequencies than were possible using

dilution technology guarantees

white water by zones according toconventional shaking units. The effectexcellent CD basis weight profiles.

requirements. The dilution water isof the DuoShake was investigated

The automation system at the Unter-

supplied to the valves via a crossusing a sheet split analysis. On thekochen plant was also extensively

flow header. It is mixed with the HC

basis of the main fiber angle and therebuilt by Voith Paper Automation.

stock in the mixing chamber. A down-

anisotropy value (measure for theThis allows the best possible use of

stream throttle valve again ensuresintensity of fiber orientation) Voith

the profiling technology. As well as thethat the suspension is well mixed.

Paper determined in several investi-

robust OnQ scanner for precise mea-

Despite sensitive detection methods

gations that the DuoShake generates

surement of profiles, the OnQ Profil-

there is no evidence of an unequala high turbulence particularly on thematic control software is also used.

ash CD profile resulting from the CDlayer close to the wire. On the whole

It controls the profiles with features

The MasterJet F/B headbox with ModuleJet and EdgeModule guarantees excellent profiles and balanced turbulences.

Special Issue I 2008 I Voith Paper I twogether

19

Décor paper

such as adaptive tuning and auto-with the production of décor paper,

Due to the fibers on top and bottom of

mapping. In addition, the OnView

an extremely low headbox consisten-

the corundum layer, the embedded

platform allows a much better insightcies of 0.01 to 0.08 percent iscorundum is prevented from dissolving

in the data collected on the PM 3.

necessary for overlay papers, resul-

out of the compound during the subse-

It enables the machine operators toting in a high throughput of 6,000 toquent processing. The increased

react faster and more effectively to

85,000 l/min*m. For comparison withcorundum content provides the productthe process conditions.

décor paper production, the through-with an extremely high wear resistance.

put at same width is 3 to 12 times
Multi-layer sheet formation

lower (1,800 to 6,500 l/min*m). The

for overlay paper

pipe dimensions of the HydroFormer
are correspondingly large.

To manufacture wear-resistantsurfaces, such as flooring, a

For good wear resistance, as muchcorundum-filled overlay paper iscorundum as possible needs to bepressed together with an alreadybound into the sheet. To achieve this,impregnated décor paper and theVoith has developed multi-layer sheet

panel, MDF-board or other substrate.

formation for the HydroFormer This

This paper exhibits quite different

technology requires three stock feed

properties from the décor paper andsystems and a headbox with lamellasis produced using a different produc-that keeps the layers separate untiltion technology.

dewatering. Trials with colored fiber

Contact
Reinhard Leigraf
reinhard.leigraf@voith.com

stock have shown that the layer
Overlay paper consists of extremely

separation works extremely well.

long fibers, which makes it necessary

The sheet structure can therefore be

to use a special sheet forming device

configured in individual layers with

with an inclined wire former, thedifferent properties. For example theso-called HydroFormer. Compared

middle layer can contain corundum.

Jan Lepper
jan.lepper@voith.com

At Munksjö Paper in Unterkochen all process parameters can be analyzed and adjusted quickly and easily using the OnView platform.

20

Décor paper

Voith Paper rolls are used for printing décor paper and pressing particle board

Laminate – from start to finish
The use of laminate is showing steady growth rates in the construction and furniture industries worldwide. But how are laminate floors and furniture finishes actually made? Several Voith Paper components
are found in the process of making this popular design material. These components include the NipcoPrint-D impression roller system and the NipcoPanel system for grouting MDF and particle board.

“In the various print phases,			NipcoPrint-D creates a result that is		 always uniform and reproducible.”			

Leo Bisping, Spokesperson at Interprint

One component in laminate is décor paper, which is produced on special paper machines from Voith Paper.

Décor paper forms the basis for the

purpose or machines that have beenand produces décor paper at a speed

manufacturing of laminate. “The highly

rebuilt for this type of production.

of up to 820 m/min. The basis weightopaque printing base paper serves as

Voith Paper is an expert in both casesof the paper produced ranges from 50

a carrier for the big variation of déco-and has frequently converted existing

to 110 g/m². Up to 40,000 tons of dé-

rations that are applied later,” explains

paper machines for the production ofcor paper is produced annually here.

Reinhard Leigraf of Special Paper

décor paper. For example, Voith Paper

One of Koehler's purchasers is theTechnology at Voith Paper. Laminate isdelivered an entirely new décor paper

Interprint décor printer with its head-

used not only for floors and furnituremachine to the Kehl-based paper pro-

quarters in Arnsberg, Germany. Herebut also for the interior work in buil-

ducer August Koehler (see page 24 forthe décor paper is printed using thedings and means of transport such as

more information about the partner-

gravure printing method. The designs

buses, trains, boats, aircraft and cara-ship between Koehler and Voith Pa-

are often replications of wood or stonevans. Décor paper is produced usingper). The PM 6 was commissioned inpatterns. Floral and graphical designs

paper machines made just for this2000. The machine is 2,300 mm wide

are also popular.

Special Issue I 2008 I Voith Paper I twogether

21

Décor paper

A Voith Paper component is also usedusing three different print cylinders. If

ger of Voith Paper Walztechnik AG inin the printing process. The Nipco-

special effects such as nacre or metal-

Zurich.

Print-D impression roller system pres-lic are desired, the pattern can beses the paper web evenly against themade using up to five different colors.

Outside the paper web, the Nipco-

inked gravure cylinder.

Print-D sleeve is lifted off of the engraThe width of the paper web that is toved cylinder in such a way that no ink

Gravure printing all the way

be printed can vary greatly for décor

is transferred to the impression roll. It

to the edge

printing. A specially offset impression

is possible to print up to the web edge

roller for the different printing widths iseven with thin décor paper. And even

The gravure print cylinders are usuallyused in order to press the paper on

for an asymmetrical web position, theengraved electromechanically with athe inked gravure print cylinder. This

NipcoPrint-D ensures the ideal web

diamond graver. The laser graver is ameans that many décor printers haveguide. “This makes expensive and lar-new innovation, which Interprint has

a large stock of various pressing rollge impression rolls inventory, as wellbeen using as the world's first andrange. In turn, this width variation

as the frequent changing of pressure

only décor printer since early 2006.

causes time consuming changes ofrollers, obsolete,” explains Marleaux.

This method uses a laser beam to

the impression roll each time the“Our current use of 12 NipcoPrint-D

create the recessed cells for the ink

web width is changed. “The Nipco-

impression roller systems has been

(also known as dots) on the surface ofPrint-D impression roll system fromgreatly successful: eight in Arnsberg,

the cylinders.

Voith Paper solves this problem with athree in Poland and one in Russia,”

A pattern generally consists of three

precisely adjustable contact width,”

reports Leo Bisping, spokesperson at

different colors and is therefore printed

explains Peter Marleaux, Sales Mana-

Interprint. “In the various printing

The NipcoPrint-D impression roller system from Voith Paper presses the paper web evenly against the inked gravure cylinder.

22

Special Issue I 2008 I Voith Paper I twogether

Décor paper

Brief cultural history:

Décor paper
The predecessor of today's décor
paper has a history dating back over
100 years. In 1907 the Belgian chemist
by the name of Baekeland obtained
the first patent for a product called
Bakelite. The original décor paper wasa mixture of wood flour or fiber andphenolic resins that could be pressed
into metallic molds and hardened at thesame time by heating.
A technique that can be compared withmodern-day laminating existed as earlyas the Ottoman Empire. The Ottomans
impregnated paper with vegetablebased or animal fats in order to preserve the paper.

The laminate panels run through several production stages before they are complete.
These range from the décor paper production, to the printing and impregnation and all
the way to the grouting with MDF and particle board.

stages, the NipcoPrint-D always achie-lent transverse tensile strength andavailable to the furniture industry

ves an even and reproducible result.”

optimum thickness profile.

or commercially in the form of engineered wood boards. The customer

The path to the

The printed décor paper first will bewill also find commercially available

home-improvement store

impregnated with melamine resin in

finished products in the form of lami-

special impregnating lines usuallynate flooring because it is a building

After printing, the décor paper is deli-done by the wood products manufac-

material that is easy to work withvered to the wood products manufac-

turer. Next step, it is laminated underand durable. An additional material

turer. A Voith Paper component canhigh pressure with particle board, MDF

used for the finish is the finishing film

also be found here: The NipcoPanelboard or other substrates.In case ofused for furniture or interior work.

system presses MDF and particle

demanded high wear resistance (e.g.

This material is usually impregnatedboard together. Instead of the stan-floor panels) an additional layer ofalready in the paper machine and isdard, very large rolls, Voith Paper

overlay paper is added to this (seeknown as a preimpregnate.

Walztechnik AG uses several small

page 20 on the topic of overlay paper).

NipcoPanel rolls in order to vary the

The haptic characteristics of the finishpressure distribution across the width

are created during the press operationof the board. The material is com-by the press steel plate (called thepressed steadily and especially evenly

caul plate) that can give the final finish

through the small space between thea diverse range of structures, regard-

NipcoPanel rolls. In this way the MDF

less of the décor. After this processing

and particle board achieve an excel-

stage, the laminated material is madeSpecial Issue I 2008 I Voith Paper I twogether

Contact
Peter Marleauxpeter.marleaux@voith.com

23

Thermo Paper

For years, Koehler has been implementing
Voith innovations

Partners in thermo paper
market leadership

24Thermo Paper

The August Koehler AG company based in Kehl uses Voith paper machines to produce its thermo papers.

“The Koehler PM 2 is state-of-the-art
					when it comes to thermo paper.”Tobias Müller, Sales Engineer in the thermo papers segment at Voith Paper

In coming years the production of thermo papers will represent a significant growth market, and theAugust Koehler AG paper mill has certainly achieved an excellent position in this international market.
The intense cooperation with Voith Paper has made a significant contribution to the remarkable market
success of the company.
“The PM 2 at Koehler is state-of-thethe Kehl plant was being built in

SpeedSizer ensures that the neces-

art when it comes to thermo paper,”1988. In 2001, an additional Voith

sary barrier and insulating properties

says Tobias Müller, sales engineer inpaper machine and offline coating

are provided for the subsequent

the field of thermo papers at Voithmachine with an annual capacity ofthermo coat.

Paper. Müller's statement underlines

120,000 tons followed with produc-

how important the systems used attion line 2. The PM 2 has a wire width

Reduced curl and optimized

Koehler are for Voith as referenceof 4,750 mm and a design speed of

web leadprojects. The two companies have

1,500 m/min, producing only thermo

been close partners for over 20 years

base paper in a basis weight range

The thermo-sensitive coat is appliedwith technical innovations from Voithof 40 to 80 g/m².

in the SM 1 and SM 2 coatingused effectively at the production

machines at the Koehler facilities

facilities of the August Koehler AG

The first film press for thermo precoa-

in Kehl. Both machines were con-company, located in Kehl. Voith wasting was also used in the PM 2. At theverted by Voith in 2001 to curtaina supplier from the first hour with its

time, this was completely unique incoater technology. Instead ofdelivery of a paper machine and an

the field of thermo papermaking.

using an applicator roll, the coatingoffline coating machine back when

Applying a one-sided precoat with acolor is now applied directly like a

Special Issue I 2008 I Voith Paper I twogether

25

Thermo Paper

The ModulePro C jet spray dampener moistens the paper web in the coating machine.

The SM 2 coating machine at the Koehler facilities in Kehl applies the thermo-sensitive
coat to the paper.

liquid curtain to the paper web. In

uses a contactless mechanism,

drying group, which is particularly

order to reduce curling that occurs

which has made it possible tosensitive. This resulted in a consi-

for papers with one-sided coating

increase the operating speed byderable reduction of the paper draw

(warping in the paper), each of the two

100 meters per minute.

and an additional increase of thecoating machines were equipped withproduction speed by about 30 meters

a ModulePro C jet spray applicator

In the summer of 2006, the pre-drying

per minute. These successes weresystem in 2006. The ModulePro C

section of the PM 2 in Kehl was

determining factors in the decisioncompensates for the roll tendency ofequipped with seven ProRelease+a few months later to also equip

the paper by releasing frozen warps

stabilizers, an innovation from Voith

the PM 1 with seven ProRelease+that remoisten the web on the nonPaper. The stabilizers ensure thatstabilizers. Around the same timecoated side. The new technology

the web run is optimized in the firstwhen the ProRelease+ stabilizers

26

Special Issue I 2008 I Voith Paper I twogether

Thermo Paper

A brief cultural history:

Thermo paper
Thermo paper can be found on
bananas, in hospitals and at concerts.
The reason for this is that today labels,
ECG printouts and admission tickets
are printed for the most part on thermo
paper.
The color inlay technique, for example,
is used with thermo paper to achievecounterfeit-proof results. Colorful inlays
in the paper reveal a different coloredlayer when the paper is torn in two.
Counterfeiters don't have a chance!
Thermo direct printing involves heating
the thermo paper in particular spots toblacken the paper. Color printing, incontrast, requires a thermo transfer ribbon. A color ribbon is placed between
the paper and the thermo printhead.
The heat melts the wax particles in the
ribbon and the pigments are transferred to the paper. Intense sunlight canconsiderably reduce the durability ofthermo printing. Keeping thermo printed materials in cellophane or in wallets
can also reduces the life of the print.
This results from the use of chemicalplasticizers and tanning agents.
However, thermo paper with a 25 year
shelf life guarantee does exist.

The PM 2 at the Koehler facilities in Kehl is used exclusively for the production of thermo
papers in the basis weight range of 40 to 80 g/m² and at a production speed of 1,600 m/min.

were built into the paper mills, a

In past years, Koehler AG was able toters above this capacity, thus making

NipcoFlex calender was built into

further secure its position as market

it possible to increase the daily capa-

each the SM 1 and SM 2 coating

leader in the field of thermo papers.

city of the machine to over 400 tons

machines. These replaced the soft

More than half of the thermo papersof thermo paper.

calender originally integrated into

produced worldwide are made by

the coating machines. Using theKoehler. The development of the

NipcoFlex calender it was possible toPM 2 in Kehl is likewise impressive:

significantly improve the smoothing
process, which is made apparent byOriginally built for a design speed of

the finish quality of today's thermo

1,500 meters per minute, today the

papers.

machine runs at more than 100 me-

Special Issue I 2008 I Voith Paper I twogether

Contact
Tobias Müller
tobias.mueller@voith.com

27

Label paper

Curtain coating for label papers and flexible packaging papers

Higher efficiency and quality
thanks to contactless coating

For high coat weights with especiallyhigh requirements in terms of finish quality,
the curtain coater outclasses the standard
method.

You find them on shampoo bottles, luggage for air travel, letters, fruit baggies at the supermarket andadvertising stickers on cars: label papers. Whether waterproof, tear-proof or easily printable, labels areused in a variety of different applications. For the purposes of coating label papers or flexible packaging
papers, Voith Paper successfully tested a cost-saving method known as curtain coating. In the past,
it was used primarily for specialty papers such as thermo and NCR paper. The curtain coater applies thecoating color with perfection and improves the efficiency of the production process.
Label papers and flexible packaging

side or more can only be applied

less mottling. The curtain coater also

papers are often characterized by ausing a contactless method such as

prevents costly breaks occurring es-

relatively low basis weight of the basethe curtain coater, if defects in thepecially with light base papers due topaper while having high coat weights

finish such as film splitting, misting or

the mechanical stress on the paper

at the same time. Multiple coats are

doctor streaks are to be prevented.

web with a coating blade. The curtain

normally applied to the paper. Usuallycoater not only offers higher papera precoat with 6 to 8 g/m is followed

Better efficiency thanks toquality; it also increases the efficiency

by one or two top coats with 8 tofewer breaksof the paper machine. When starting2

12 g/m . This usually involves multiple

up a new paper grade, saleable2

blade coats or a combination of film

Compared to a conventional blade

quality is achieved faster because theand blade coats. For high coat weights,

coat, the curtain coater from Voith

ideal coat weight can be immediately

if there are especially high require-

Paper achieves better coverage. Thisapplied and the grinding-in time ofments in terms of the finish quality, thealso has a positive effect on the sub-the coating blades is eliminated. In

curtain coater outclasses the standard

sequent printing because a homoge-

addition, downtimes are shorter

method. Coat weights of 20 g/m pernous printed image is achieved withbecause no wearing parts such as

2

28Special Issue I 2008 I Voith Paper I twogether

label paper

blades, rods or rubber covered

pend on the particular application.

agent system and the additive ensuresapplicator rolls have to be replaced.

Basically the minimum flow rate is ap-

production efficiency and productCleaning times are drastically redu-

proximately 4 to 6 l/min*m, no stable

quality. When it comes to specialty

ced as well. Tests with the Voith

curtain is formed at lower rates. The

papers in particular, the curtain coater

Paper pilot coater showed that the

maximum coat weight greatly depends

offers a great economic advantage be-

combination of MG base papers andon the properties of the coating colorcause an expensive functional coating

a curtain coater yielded especiallyand on the base paper. Trials perfor-

can be at least partly replaced by aoutstanding results. Use with label

med by Voith Paper have shown thatless expensive base coat. The curtain

papers and flexible packaging papers

coat weights between 5 and 20 g/m²

coater can also be used for specialty

is therefore a viable application.

at a machine speed between 400 andpapers by applying multiple coats withThis involves applying the coat to the

1,500 m/min are possible without any

the curtain coater. Using multi-layersmooth side of the paper. In trials,

problems. It was also possible to apply

curtain coating it is possible to apply

the master samples were outdone incoating weights greater than 30 g/m².

several different media simultaneously.

terms of the roughness as well as

For borderline applications such as at

In the future, Voith Paper plans togloss. Because the base paper isvery high speeds or light coats, it may

use the curtain coater not only foralready smooth, using the curtain

be necessary to optimize the coating

specialty papers but also for classic

coater achieves PPS values aroundcolor. Together with BASF and Omya,

pigment coats for wood-free and1.0 µm. It is possible for curtain-

Voith Paper developed the testing me-

wood-containing commodity papers.

coated papers to match the gloss

thod and the necessary components

level of blade-coated papers.

for different coating colors. Pigment
mixtures, binding agent systems and

The curtain coater offers athe selection of additives are practical-

broad operating range

ly no different from those of standard

Contact
Thorsten Heidt
thorsten.heidt@voith.com

coating methods. The solid content
The coat weights and speeds that are

and viscosity are of a similar level.

possible with the curtain coater de-

The right selection of the binding

Label papers are encountered frequently in day-to-day life, for example, when buying fruits and vegetables.

Special Issue I 2008 I Voith Paper I twogether

29

banknotes“The production of banknote paper			is constantly being developed inorder to make banknotes			
more counterfeit-proof,
more soil-resistant and more durable.”
Wolfgang Neuß, Specialist for banknotes and security paper machines, Voith Paper

The way to keep banknotes clean longer

Protection coat for banknotes
The life of a banknote is sometimes very short. Like the famous
Thaler coins, it travels from one hand to another, transforming in
the process from a clean note to a wrinkled, dirty scrap of paper.
There is a new protection coat that can be used to improve thedurability of banknotes and make them more impervious to soil.

Some years ago, it was a commonof Voith Paper. No other specialty

and measures taken, money counter-notion that banknotes would increa-

paper captures so much attention infeiters time and again succeed in ma-

singly be replaced by electronic cash.

the development of new production

king duds that consumers are onlyThis has yet to be proven, and theand counterfeit-proofing methods thanable to recognize with great difficulty

banknote is still a means of payment

banknote paper. In addition to paper

as counterfeit. In Canada, for examp-

as much as it ever was. The banknote

mills, banknote producers also includele, 26-year-old criminal Wesley Wayne

paper sector has seen a growth ratesecurity paper printers, security inks

Weber was able to introduce 67,000

of five percent, thus giving it a top

producers as well as security threads

counterfeit 100 dollar bills into circu-

position in the paper sector.

and hologram makers. These produ-

lation between June of 2000 and Julycers strive to ensure that banknote pa-of 2001. The Canadian economy suf-

per is unmistakable to those using it.

fered total damages in the amount of“The production of banknote paper isconstantly being developed in order to

6.7 million Canadian dollars. As a re-make banknotes more counterfeit-

Yet this specialty paper is also given

action to the incident, the Canadian

proof, more soil-resistant and more

a great deal of negative attention as

Bank introduced a new generation ofdurable,” according to Wolfgang Neußwell. Despite all security precautions

100 dollar notes having better anti-

30

Special Issue I 2008 I Voith Paper I twogether

banknotes

A brief cultural history:

Banknotes
Paper money was issued for the firsttime around 1024 in China as an
emergency currency for financing a
war in a time when there was a coinshortage. In 1402, paper money wasabolished again in China because theemperor had large quantities of banknotes printed without paying attention
to their funding.
In Europe, the first paper money
appeared in 1483 in Spain, again, as
a temporary replacement for lacking
coinage.

The multi-tone watermark and safety thread that is inserted are worked into the
production on the Voith paper mill in the sheet forming section.

MasterVat with ShortFormer B.

counterfeiting attributes. Since 2001,

bia. In 2005, 13 offset printers wereto the paper at a very high pressure.

bands of counterfeiters in Europe

busted, ten of which were found inThis creates noticeable embossed

have mainly been focused on making

the Euro zone.

patterns that can be felt easily with

20 Euro and 50 Euro notes, whichyour fingernails. For laymen it is an

make up around 80 percent of all fake

Authenticity through intaglio

attribute of authenticity that is easy tonotes. About 60 percent of theseprinting and specialty paper

recognize. Due to stricter security

fakes are made using professional

checks it is nearly impossible foroffset printing machines and the re-

The printing of banknotes usually in-counterfeiters to get their hands on

maining 40 percent with inkjet prin-volves a combination of lithographic

the intaglio printing machines.

ters.

printing (offset printing) and intaglio
printing. With intaglio printing, engra-

In the past, all counterfeits had one

According to Europol, 11 offset prin-ved steel plates are used which carrything in common: They were not prin-ters and 58 counterfeiters were expo-

an image in recess. The recesses of

ted on genuine banknote paper with

sed in 2004, the majority of which

the plates are filled with security ink.

the typical multi-tone watermarks

were located in Bulgaria and Colum-

The printing ink is then embossed in-

and with the security thread that isSpecial Issue I 2008 I Voith Paper I twogether

31Banknotes

embedded into the paper. Both of

on after six to ten months. A 500 Euro

offline method allow reliable conclusi-

these authenticity attributes are wor-

note, which changes hands lessons to be made concerning how theked into the paper during the forming

frequently, can remain in circulation

protective film applied to the paper

section of the machine. The double-

for several years. The clean note

affects the security threads andlayer forming system from Voith

policy is very expensive, however.

watermarks in the paper. Outstanding

Paper, which consists of the Master-

Depending on the type and authenti-

results were achieved. In the online

Vat and the ShortFormer B, makes

city attributes, it costs on average

process, where the speed is limited

Voith the market leader in this

4.5 cents to produce a banknote.

by the watermark, speeds of up totechnique. Nearly all European

The annual consumption per capita

120 m/min were tested. In the offline

banknote paper mills produce thein Europe is approximately 15 bank-process, production speeds of up tosecond paper layer using the Short-notes. This means that in Germany,

750 m/min were possible. The Voith

Former B that Voith Paper hasa country with a population density

SpeedSizer, which is tried and tested

continued to develop.

of approximately 80 million people, ain many other paper mills, also emer-

total of 1.2 billion banknotes are

ged as the right choice for the ideal

Clean note policy makes

consumed annually - or an expen-

coating head.

everything clear

diture of 54 million euro!

Signs of use on the banknote can

It is therefore no surprise that banks

make it considerably more difficult tohave a vested interest in procedures

determine authenticity. The dirtier athat make banknotes more soil-resist-banknote is, the more difficult it is toant and durable. Many producers ofidentify the attributes of authenticity.

banknotes offer durable or long-life

For this reason, many countries havebanknotes that have a protection

adopted what is known as a “clean

coat. In late 2006, Voith Paper wasnote policy.” Soiled banknotes arecommissioned by a renowned makerquickly taken out of circulation andof banknotes to perform coating trials

replaced by new ones when signs ofusing the Voith SpeedSizer at Voith's

wear are discovered. A 20 Euro note,pilot coater in Heidenheim. The tests

for example, is taken out of circulati-

performed both with an online and32

Contact
Wolfgang Neußwolfgang.neuss@voith.com

Special Issue I 2008 I Voith Paper I twogether

banknotes

In a special Voith Paper machinefor banknote paper, the MasterVat
and ShortFormer B are used for the
double-ply sheet forming.

A brief cultural history:

Banknotes
Large and small currency
After the US Dollar, the Euro is the mostwidespread currency used worldwide. On
July 31, 2008, there were about 12 billion
Euro banknotes with a value of 686,546
billion euro in circulation. The Falklands
Pound is a drop in the bucket in comparison: With only 5,000 users, it is the rarest
currency used around the world.
Counterfeit money
During the first half of 2008, the German
Central Bank registered 19,913 counterfeit
Euro banknotes. Among the 6,103 fakes,
50 Euro notes were the most frequently
counterfeited banknotes, closely followedby 100, 200 and 20 Euro notes. This
resulted in an actual loss of approximately
1.8 million euro. Counterfeit money is not
replaced. He who does not want to walkaway from the bank empty-handed should
therefore always verify his notes by inspecting the integrated attributes of authenticity: Do the holograms change when tilting
the banknote? Can you feel the embossing
texture on the note? Is there a watermark
recognizable in a non-printed area?

Special Issue I 2008 I Voith Paper I twogether

33

Masking Tape

Décorative paper machine converted to produce masking tapeFlexible paper for masking
If when painting walls you forget to mask off the doorframes, no matter how careful your brushstrokes,
you will never get a clean result. This is why there is masking tape. It is flexible, prevents the penetration of paint or lacquer and is easily removed again from the surface to which it is stuck. Since the fallof 2007, the PM 4 at Munksjö Paper in Besozzo, Italy, is now able to produce masking tape in addition
to décor paper as a result of a rebuild.
Masking tape is a paper with a self-order to apply it to various surfaces.

creping the paper in the wet section

adhesive coating on one side. Its

The elongation is achieved by wet-of the paper machine. The moist web

elongation in machine direction must

creping the paper web during the pa-

adhering to the surface of the roll is

be high and it must be easy to tear inper production process. This involves

removed by a doctor. The special

Masking tape has to be flexible. Its elongation Is the result of the wet creping of the paper web.

34

Masking Tape

Before the rebuild by Voith Paper, the paper
machine in Besozzo was a fourdriniermachine with dandy roll producing décor
paper. The rebuild now makes it possible for
the PM 4 to produce masking tape as well.

The entire scope of delivery:• CeraSize roll cover• Crepe doctor• 3 DuoStabilizer rolls• 3 DuoStabilizer boxes• Coating of drying cylinders 2, 3 and 4• Total of 7 Voith Drives for the dryer section“The conversion to wet-creped paper posed					a special challenge in Besozzo.”
Philipp Buchhold, Engineer for Process Technology, Voith Paper

design of the creping doctor and theSophisticated rebuilt for

The wet crepe process has special

doctor angle causes the paper to be

an additional paper grade

requirements for the web run of thecompressed as it is doctored off thepaper into the dryer section as wellroll. Fine wrinkles are formed in the

The PM 4 in Besozzo is a fourdrinier

as inside the dryer section itself. To

sheet. The wrinkles run in cross ma-

machine with dandy roll. The transfer

prevent creases from forming, thechine direction and shorten the paper

into the press section is realized withsheet run must be controlled precise-

web, which requires a considerable

an open pickup. The press consists

ly and gently. The high elongation po-

speed difference between the pressof two bottom felted, one top felted

tential of the paper requires that thesection and the dryer section. “Thestraight through presses. In order todraws throughout the dryer sectionchange to wet-creped paper posed a

produce wet-creped papers, Voith

can be adjusted individually in orderparticular challenge in Besozzo,”

Paper installed a special cover andto minimize the loss of crepe. In the

explains Philipp Buchhold, engineer

creping doctor on the smooth bottom

PM 4 this problem is solved by using

for process technology at Voith Paper.

roll of the third press nip. Blade angle,

short dryer groups that allow mini-

The existing PM 4 for décor paper

facet and protrusion of the creping

mized web tension as well as mini-

needed to take over the production of

doctor provided by Voith Paper can bemized felt draws. The felt run in themasking tape from another location

adjusted. In connection with the re-first part of the pre-dryer section

while of course delivering the same

lease properties of the roll cover, these

was therefore rebuilt to slalom run.

quality as well.

significantly affect the creping quality.

Instead of the lower drying cylinders,Special Issue I 2008 I Voith Paper I twogether

35

Masking Tape

Voith Paper installed three DuoStabi-cylinders were driven by an open

doctored for the production oflizer rolls. In the open draws the pa-

spur gear. In order to realize smaller

décor paper. The wire speed during

per web is guided safely by three newdrive groups, seven Voith Drives were

the production of masking tape with

DuoStabilizer boxes. The high degree

installed. The concept eliminates the

38 g/m² on the PM 4 was increasedof flexibility of the DuoStabilizers of-need for the spur gears. The first four

to 500 m/min from the 350 m/min

fers a great advantage in the case ofdrying cylinders are driven on front

capacity of the previous production

the PM 4 because of the big varia-

side and the three DuoStabilizer rolls

location. The quality of the crepe andtions of the sheet width.

on drive side. The direct drive, which

the elongation of the masking tapedoes not need any interposed me-

paper were fully achieved. In additi-

The pre-drying section was additio-

chanical components, is ideal for theon, the PM 4 can still be used tonally rebuilt to ropeless threading inlimited space available on PM 4 inproduce décor paper at the sameorder to make the tail threading moreorder to allow the first cylinders to be

speed and quality level as before theefficient and stable and to prevent

driven individually.

rebuild.

breaks. Parts of the framing of the
pre-dryer section were replaced inVoith Paper also improved the coa-order to guarantee the ideal arrange-ting of the drying cylinders. Three ofment of rolls and doctors.

them now have an anti-adhesive
coating made by Voith's subsidiary

The Voith Drive, a new drive concept

PicoTeknik in order to prevent a

from Voith Paper, is also being usedscaling of the drying cylinders. At thein Besozzo. In the past, the drying

same time, the cylinders can still beContact
Philipp Buchhold
philipp.buchhold@voith.com

A brief cultural history:

Masking Tape
In 1923, engineer Richard G. Drew cameacross a problem: For two-toned auto
paint jobs, the finished parts could only
be covered with great difficulty. He spent
two years experimenting with various
materials, including vegetable oils, resins
and rubber. In 1925 he presented his first
results.
The paper base material, which was only
coated with adhesive on the edges, did
not stick adequately. Drew improved histape by completely coating the basematerial. Hundreds of different types ofmodern tapes have been developed basedon this original prototype of tape paper.

36

Special Issue I 2008 I Voith Paper I twogether

Masking Tape

Mirroring of the creped
paper web

Paper web

Creped paper

The paper creped by a crepe doctor below in the
picture is mirrored in the roll (left in picture). The
finished crepe paper is visible at the right in the
picture.

37

Wet laid nonwovens

Filter papers for coffee pads are produced in the wet laid nonwovens process.

Wet laid nonwovens technology is multilayer

Paper production from the tea bag to roofing
Regardless of whether it's tea bags or coffee pads, gasoline filters or air filters, roofing material or
overlay paper for laminate floors – all these products are manufactured with the wet laid nonwovens
process. The technology comes from paper manufacturing and is not only for manufacturing wet laid
nonwovens material, but also for production of long-fiber special papers. Voith Paper offers systems
for manufacturing the most varied wet laid nonwovens, among which is the HydroFormer sheet
formation unit. In Düren, Germany, Voith Paper has a HydroFormer pilot line.

38

Special Issue I 2008 I Voith Paper I twogether

Wet laid nonwovens

Long fibers are used for the composi-

1 and 5.3 meters are common; thetion of wet laid nonwovens. The fibers

basis weight ranges are between 10

can be up to 40 mm long and must be

and 300 g/m2. Wet laid nonwovens

dispersible in water. For homogeneous

facilities operate at production

formation of the fibers, a suspension

speeds between 50 and 550 m/min.

with low stock consistency is necessary in which the long fibers can be

We present two exciting application

well-distributed. The stock consisten-

examples from Voith Paper in the areacies are from 0.1 to 0.8 g/l. For com-of wet laid nonwovens technology.

Typical HydroFormer of a 5 meter wide
glass mat machine.

parison with graphic papers, stock
consistencies of 5 to 8 g/l are required.
The low stock consistencies requirea large throughput quantity in theheadbox. In the wet laid nonwoven
process, an inclined wire as sheet formation unit is necessary in order tohandle the large throughput quantities. For over 40 years, Voith Paper
has been building inclined wire machines with the brand name HydroFormer, which is continuously being
further developed and improved.
In Düren, Voith Paper operates a
HydroFormer pilot line that can beused for customer trials.
Along with single-layer HydroFormers, Voith Paper has also developed
HydroFormers that can produce mul-

Application example 1: Glass fiber matsti-layer products. With multi-layer
headboxes, the suspensions of theseparate layers are individually fed into the sheet formation space via headers and tube banks. Flexible lamel-

The largest glass fiber mat machinein the world

las separate the flows in the last
headbox section as the suspensions

In the last few years, the demand for glass fiber mat in the US

enter the forming area.

has noticeably increased - on the one hand, due to the booming
construction industry, on the other hand, due to many hail storms

The capacity of wet laid nonwovens

and hurricanes that have destroyed residential roofs. One of the

facilities can be between 2000 tons

leading glass fiber mat manufacturer in the world responded to theper year for light products such as

growing market in 2007 with construction of the largest glass fiber

tea bags (12 g/m ) and 115,000 tons

mat machine in the world located in the United States. Voith Paper

per year for glass fiber mat products

supplied the HydroFormer GV2, the binder impregnation section(122 g/m ). Machine widths between

and the white water circulation system for this machine.

22

Special Issue I 2008 I Voith Paper I twogether

39Wet laid nonwovens“The challenge of this project was			to build a glass fiber mat machine for which there was no
fan pump on the world market that was large enough.”
Dr. Klaus Afflerbach, Technical Sales Manager, Voith Paper

The three-layer glass mat was producedwith the HydroFormer from Voith Paper.

Glass fiber mats are used as the base

“The challenge of this project was toVoith Paper developed a suitable de-material for floor coverings, asphalt

build a glass fiber mat machine forsign for the headbox and associatedshingles and asphalt rolls, among

which there was no fan pump on thewhite water circulation system for theother products. There are older glass

world market that was large enough,”

new forming section. The resulting

mat machines operating in the width

explains Dr. Klaus Afflerbach, techni-

system incorporates two fan pumps

ranges of 2 to 5 meters. But tocal sales manager at Voith Paper. In

to achieve the high flow require-achieve higher production capacities

manufacturing glass fiber mats forments. This arrangement also pro-the latest installation is the largest

roofing, the stock in the headbox

vides the possibility of producing

glass mat machine in the world. The

must have a very low consistency.

two-layer glass fiber mats if desired.

formation width of the new machine

Only in this way can the 25 - 40 mm

To accommodate the two fan pumpis 5,300 mm with production speeds

long fibers form a uniform mat onflows the forming section must beof over 400 m/min.

the wire. The end product is thenequipped with a two-layer Hydro-

distinguished by high tear resistance.

Former headbox.

For machines of such wide widths

But the required white water circula-annual production capacities of overtion quantity of up to 500,000 l/min

The two conically parabolic headers

100,000 tons of glass mat can be

could not be attained with any avail-of the headbox are arranged counterproduced with typical glass mat basis

able fan pump at the low pressure

to one another. Feeding is done withweight ranges of 50 to 140 g/m2.

levels below 2 bar. The engineers of

one header from the drive side, and40

Special Issue I 2008 I Voith Paper I twogether

Wet laid nonwovens

HydroFormer
Worldwide unique technology for production of three-layer wet laid nonwovens
Voith Paper is the world market leader in wet laid nonwovens facilities and offers with
the HydroFormer a unique technology for production of one-, two- and even three-layer
wet laid nonwovens. The flexibility makes it possible to produce wet laid nonwovens for
special applications such as filter, overlay and filter papers for coffee pads. The Voith
HydroFormer is used in the most high-power wet laid nonwovens machines worldwide
with production speeds up to 550 m/min and production widths up to 5,300 mm.

the other header from the tender side.
Stock preparation and white water
circulation system are also designedwith two approach flow systems.
Different fibers and fiber mixtures
can thus be used in both lines of thestock preparation and the white water
circulation system.
“Preliminary results from two layer
glass mat production evaluations
have shown that the quality of theglass fiber mats is noticeably better
than on comparable older machines.
Both the formation as well as the
profiles of the glass fiber mats show
clear improvements,” reports
Dr. Klaus Afflerbach.

Special Issue I 2008 I Voith Paper I twogether

41

Wet laid nonwovens

Application example 2: Wallpaper base paper

New headbox ensures market leadership
The Neenah Lahnstein paper plant produces wet laid nonwovens for wall coverings. Particularly
wallpapers that are dry peelable, also called dimensionally stable papers, are currently much indemand. The company reacted to the growing market with a conversion of the existing PM 6 paper
machine. In only 14 days, Voith Paper equipped the PM 6 with a new closed HydroFormer headbox
and modified the white water circulation system. The result speaks for itself: since then, theproduction capacity is 20 percent higher.
“In order to be able to survive as

circulation system was modified

this,” says Bernd Rudolf, technicalmarket leader in wet laid nonwovens

in order to adapt the dewatering

director at Neenah Lahnstein.

for wall coverings, an expansion of

capacity to the increased speed.

The rebuild was finished within the

our capacities was urgently necessa-

scheduled time.

ry,” Deflef Stoltefaut, manager of

The rebuild itself took only 14 days.

Neenah Lahnstein, reports about theIn the process, not only the new“From the very beginning, the quality

reason for the conversion. Previously,

HydroFormer headbox was in-of the specialty papers and thethere was a bottleneck between thestalled, but other areas of thecapacity of the machine met what

open HydroFormer headbox, thepaper machine were also optimized.

Voith Paper had promised,” says

fan pump with white water and“Up to 80 employees of different

Rudolf. “The good team work bet-

extraction tank. Voith Paper met thiscompanies and in-house techni-

ween Neenah Lahnstein, Voith Paper

challenge with a new closed head-cians from Neenah Lahnstein

and the assembly personnel achie-box. In addition, the white water

were working around the clock forved the success in this project.”

The trailer delivers the top part of the white water tank and the expansion of the extraction tank for the PM 6 at Neenah Lahnstein.

42

Special Issue I 2008 I Voith Paper I twogether

Wet laid nonwovens

Technical specifications
HydroFormer pilot line in Düren
Formation width: 0.5 m
Design speed: 1,000 m/min
Working speed: 10 - 600 m/min
Basis-related weight range:
10 g/m² to 700 g/m²
Consistency in the headbox: 0.01% to 0.3%
Max. headbox throughput: 24,000 l/min

Customers have the opportunity to carry out trails on the HydroFormer pilot line in Düren.

Brief cultural history:

HydroFormer pilot line in Düren, Germany

Tea bags

Less risk through trials
When considering modifications to a wet laid nonwovens machineor investing in a new machine, there are ways to minimize risk.
Voith Paper offers the possibility of running trials on the HydroFormer pilot line in Düren in order to test the technology. Voith
Paper also uses the machine for development testing.
The headbox of the HydroFormer

the headbox can be changed.

pilot line can be operated as one-,

It is thus possible to find the best

two- or three-layer. Fibers up to asetting of the headbox and the wire

length of 40 mm can be used.

section for each grade. Hand sheets

The pilot line consists of a pulper,

can be taken from the wet rolls forthree machine chests, a closed whitefurther analysis.

water tank, a 3-layer HydroFormer
headbox, an inclined wire section(10° to 20°), a pickup and a press
section.
“The core of our machine is thethree-layer HydroFormer headbox,”
explains Egon Friesenhahn,
R & D engineer for special machines

Contact
Dr. Klaus Afflerbachklaus.afflerbach@voith.com

There are tea bags in all variations:square, round, pyramid-shaped, withstring, stapled or knotted.
Even the ways of using the specialty
filter papers filled with tea differ fromcountry to country. While people dowithout tea bags altogether in China,
in Great Britain they prefer flat, roundbags without string that are put on thebottom of the cup. The Germans favor
the square tea bags with string andstaple.
The tea bag was invented over 100
years ago, accidentally, as it were.
A tea merchant from the US wanted
to avoid unnecessary weight whenshipping his tea samples and put
the tea in small, space-saving silkbags. The recipients immersed theentire bag in the water when preparing
the tea, assuming that this was so
intended. A few years later, tea bags
were made from paper.
Today, tea bag paper is manufactured
on inclined wire machines (e.g., Voith
Paper HydroFormers).

at Voith Paper in Düren. The wire
angle and the apron board angle ofSpecial Issue I 2008 I Voith Paper I twogether

43

PAPER FOR CIGARETTES

Production of one filter cigarette requires three specialty papers

If the tobacco tastes good, give some credit to the paper
Specialty papers are sometimes a matter of taste. That becomesquickly clear with a good coffee filter that influences the aroma of thestimulating drink. Papers for cigarettes are of a similar significance.
The paper grades used have an effect on the taste, the strength andthe reputation of a cigarette. Cigarette papers, plug wrap papers
and tipping papers for the most varied brands are produced on Voith
specialty paper machines.
For production of the roughly 700,000 tons of paper, the highest
quality requirements apply, and thus also for the three machines that
Voith Paper recently delivered in Europe and to China.

44

Special Issue I 2008 I Voith Paper I twogether

PAPER FOR CIGARETTESPlug wrap paper

Tipping paper

Cigarette paper

The tipping paper determines how strong acigarette seems by means of the air supply.

Three different paper grades are used in the production of filter cigarettes:
plug wrap paper, tipping paper and cigarette paper.

The cigarette market is currently

weight is necessary for this. With a

Porous plug wrap paper

developing internationally in different

high production speed of up to

determines cigarette strength

ways. While sales in Western Europe

16,000 cigarettes per minute, machi-

and North America are on the decline,

ne demands for mechanical strength

Optimum air porosity is required forsustained growth can be seen in

and elongation of the paper areplug wrap paper, because by means

Asia. Thus the market in China, forgrowing. In addition, high opacity isof the air supply this paper deter-

example, grew by 15 percent in 2007.

required that is achieved with filler

mines strength of the cigarettes. In

The elaborate production that makes

material (25-35 percent). The cigaret-

production, the defined porosity musta filter cigarette a high-tech productte paper in the basis weight range

be achieved without deviation. It canis the same in all markets. Since theof 24 to 37 g/m has a porosity

be very high with up to 20,000 CUs,

properties of a cigarette heavily de-

between 30 and 110 Coresta (CUs).

for example, with light cigarettes.

pend on the paper characteristics,

In the tobacco industry the porositywith these specialty papers it is a

is measured by the Coresta unit.

In order to achieve the required stiff-

matter of a uniform basis weight pro-As a rule, wood-free fresh fibers areness of the plug wrap paper, the very

file and porosity profile. The porosity

used for production, in part mixed

long special fibers made primarily ofof the paper significantly determines

with special fibers from flax andManila or sisal hemp have to be opti-

the taste and the intensity, since it

hemp. Most cigarettes are given an

mally distributed. That can only be

influences the amount of air that isembossed marking that is alreadyachieved with very low consistency inused for burning tobacco in theapplied in the press section.

the headbox, and only the HydroFor-

cigarette.

In Jingfeng, China, the first spool reelmer is able to handle the quantities of2

was produced on the latest Voith

water needed to achieve the high po-

Cigarette paper burns along

cigarette paper machine in the thirdrosity. For that reason, the two com-with consumption

quarter of 2008. The proven compon-

plete Voith paper machines and theents such as the RollJet K headbox,

last machine started up in China also

The best-known of the three paper

the DuoShake (shake unit, free of re-have a HydroFormer. The dryer sec-

grades is the usually white cigarette

action forces for Fourdrinier machines)

tion is equipped with a DuoStabilizer

paper that encases the tobacco andand the SpeedFlow also contribute tofor outstanding web run and with theburns along with it. A good CD profile

the highest reliability in this special

SpeedFlow coating unit for efficientwith regard to porosity and basis

paper machine.

application of various additives.

Special Issue I 2008 I Voith Paper I twogether

45

PAPER FOR CIGARETTESThis cigarette paper machine in China produces 12,000 tons of cigarette paper per year.

Appearance is decisive at

Europe and was supplied by Voith.

brings about defined ventilation

the tipping

Like cigarette and plug wrap paper,

characteristics. The RollJet K rectifier

tipping paper is also among the veryroll headbox with ModuleJet ensures

The printed tipping paper also deter-

light grades, with a basis weight ofa uniform basis weight profile inmines the character of a cigarette;

28 to 40 g/m .

cross direction and a good formation.

2

A DuoCentri press is used in theby means of its perforation, thequantity of additional air is controlled.

It gets its appearance in the gravure

press section. A subsequent straight-

The widest and fastest paper mach-printing process, usually with a cork

through press with the newly devel-ine producing tipping paper runs indesign, or white. Off-line perforation

oped Nipco-F1 roll – ideal for deflec-

Jingfeng PM 1
		

Hengfeng PM 14

N.N.

Paper grades

Cigarette paper

Plug wrap paper

Tipping paper

Basis weights

25-45 g/m²

17-28 g/m²

28-40 g/m²

Wire width

3,800 mm2,200 mm5,950 mm

Uncut working width

3,300 mm1,900 mm5,100 mm

Design speed

600 m/min

400 m/min

1,000 m/min

Production

41 t / 24 hr

20 t / 24 hr

122 t / 24 hr

46

Left:
Technical specificationsof the Voith paper
machines described.

Right:
Design of acigarette paper
machine.

Special Issue I 2008 I Voith Paper I twogether

PAPER FOR CIGARETTES

Brief cultural history:

Self-extinguishing cigarette
If things go the way the EU wants,in three years at the latest the selfextinguishing cigarette will be on themarket to prevent fires.
And this is how the integrated fire
stopper works: two rings made ofcellulose or alginate that cannot be
felt and are tasteless are sprayed onto
the cigarette paper. If the cigarette
isn't smoked for a longer period, theyquench the burning ash. Depending
on how far the burning ash is fromone of the rings after last being
smoked, the cigarette automaticallygoes out after a few seconds or
minutes.

tion compensation – allows separate

On the other hand, the opposite

setting of the roughness two-sided-side from the print must meet allness. The SpeedSizer between

requirements for further processing,pre- and after-dryer sections allows

e.g., penetration characteristics for

two-sided sizing, and for alternative

the glue and suitability for bonding.

grades even pigmentation. On theAlong with surface texture, this paper

one hand, good printability of tipping

must of course be odor- and taste-

papers requires a very homogeneous,neutral so that the smoker can enjoysmooth, glossy or matt surface.

the cigarette.

Hengfeng PM 12

RollJet K
		Fourdrinier with dandy
roll and DuoShake

Combi II plus
CombiDuoRun
marking press		

Special Issue I 2008 I Voith Paper I twogether

SpeedFlow

Contact
Christophe Le Morzadec
christophe.lemorzadec@voith.com

CombiDuoRun

Reel

47

ProduCtS

Tailor-made products for optimization		of specialty paper machines
A small conversion can bring about big changes with specialty paper machines. Voith Paper offers notjust complete specialty paper machines, but also products and concepts for optimization of existingmachines. In this way, often substantial improvements can be achieved - with regard to efficiency,
quality or productivity. Small investments usually pay off quickly. In what follows, two products aredescribed that are frequently used for upgrading specialty paper machines:
the “Value Plus Thread Concept” and the “RopeRing”.

TailFeeder		

TailRoll

TailDoctor

TailDeflector

Product 1: Thread concept – new concept provides for reliable thread transfer through the press section

Quick web feeding after a breakAfter a paper break in the press section, it often takes a long time for production to resumed. This
results in expensive downtimes. For that reason, Voith Paper has developed the “Value Plus Thread
Concept.” It provides for reliable and quick transfer of the paper thread through the press section andinto the dryer section.

48

Special Issue I 2008 I Voith Paper I twogether

ProduCtS

TailDeflector
TailDoctor
			

TailRoll

TailFeeder

The “Value Plus Thread Concept” (red marking) is suitable for retrofitting in existing specialty paper machines.

The tight construction in the press

The TailFeeder is connected to thecleaning out of the paper on thesection for reduction of open pulls ofcompressed air supply and acts asconventional removal doctor blade

the paper web makes it difficult andan air knife. Without direct contact,is omitted. In order to also guide thedangerous for the papermaker toit lifts the paper tail off of the central

paper thread through the dryer sec-

guide the thread through the pressroll by means of blow air. The papertion, it must be channeled into the ro-

section. The “Value Plus Thread Con-

tail is thus not creped and retains its

pe transfer system. That is why Voithcept” solves the difficulties with slight

stiffness. Thus, in the transfer pro-

Paper developed the TailDeflector. It

modifications in the press sections

cess only a slight raising of the pullserves as an elongated arm of theand four newly developed modules -is necessary.

paper maker with which the latter can

the TailFeeder, the TailRoll, the Tail-

easily and safely grasp the tail andDoctor and the TailDeflector. The

The TailRoll – a directly driven feed

guide it into the rope carrier system of“Value Plus Thread Concept” canroll – is applied to the press fabric ofthe dryer section in a repeatable andbe retrofitted in every paper machine

the free-standing press on the lightsafe fashion. In this way, the danger ofwith free-standing press and rope

gap and thus the feed strip is fixedreaching into the running machine iscarrier system. The two paper guidedirectly after contact with the press

avoided. After the transfer, the paperrolls before and after the free-stan-fabric. Immediate fixation prevents

web is run wide and the paper guideding press are provided with athe formation of lumps and protects

rolls are swiveled back into the opera-

hydraulic swivel mechanism and athe press fabric from damage duringting position for reduction of open

direct drive in the optimization.

feeding. Subsequently, the new doc-

pulls. The “Value Plus Thread Con-Thus, sufficient room for the transfer

tor blade, TailDoctor, is applied to thecept” modules have been successfully

results and accessibility on the drive

top roll of the free-standing press andused worldwide since 2007.

side is improved.

automatically activates its air transfer
nozzles. The TailDoctor lifts the paper

When the web with the paper thread

tail from the role and guides it directly

cut by the couch squirt runs into theinto the downstream dryer section.

press broke at the central roll, theThe transfer through the free-stan-feed strip is transferred with the Tail-ding press thus takes place in one

Feeder into the free-standing press.

operation and the time-consuming

Special Issue I 2008 I Voith Paper I twogether

Contact
Marcus Schwier
marcus.schwier@voith.com

49

Products

Product 2: RopeRing – reliable feeding of the paper thread through the dryer section

Line rope grooves accurately to dimension with RopeRing
As a rule, paper machines for manufacturing specialty papers are equipped with a rope carrier system.
The rope grooves of the dryer cylinders in the paper machine are exposed to heavy loads in thisconnection. Among the frequently occuring signs of wear are big rope grooves caused by feed ropes
running at differential speeds. As a solution, Voith Paper developed the RopeRing that lines rope
grooves and provides for safe and quick feeding of the paper thread through the dryer section.
Deep rope grooves on the cylinders

guides the ropes and the tail on anmeans of Voith Paper laser technolo-

cause a differential speed between

ideal radius so that the differential

gy and the molded steel ring is pro-transfer rope and cylinder surface in

speed between the feed ropes andduced custom-fit for the respective

the dryer section. With increasing

the rope groove is minimized. By

application. During mounting on thedepth of the rope grooves, the ropesmeans of the optimal clamping of thedryer cylinder, the RopeRing isdiverge and rope wear increases. The

paper thread with the RopeRing, thewelded, pinned and ground. Dueunsafe guiding and faulty clamping of

feeding operations are significantly

to the exact preparation, eight tothe paper thread then leads as a rule

improved and the feeding times are

10 RopeRings can thus be installed in

to breaking of the thread. In addition,

again noticeably shortened. Use of

12 hours. Voith Paper has 500 Rope-the increasing transfer times lower

the RopeRing thus reduces down-Rings already being successfully

production capacity.

times and increases the runnability ofused in the market.

the paper machine. The RopeRing is
For this reason, Voith Paper has de-installed directly into the rope groove.

veloped a new product that is opti-

Reworking of the existing rope groo-

mally suited for upgrading existingve is usually not necessary. The Ro-

dryer cylinders. The RopeRing is apeRing is suitable for all rope groove

molded steel ring that lines the rope

forms, even for loose rope rings. The

groove accurately to dimension. It

existing rope groove is gauged byContact
Marcus Schwier
marcus.schwier@voith.com

A cylinder without (left) and with RopeRing (right). It lines the rope grooves accurately to dimension in order to minimize differential speeds.

50

Special Issue I 2008 I Voith Paper I twogether

GLOSSARY

A little paper lexicon
In this special issue of “twogether” we introduce you to the world of specialty papers.
In what follows, you will once more get a brief overview of the particularities of all specialty paper
grades presented and how they are used.

Décor paper

Characteristics	Paper with good dimensional stability and very high opacity. Must be designed for
impregnation and heavy loads. One-sided smoothness for good printability.
Use

Overlay paper

Characteristics 	Very robust. Consists of long fibers. Low stock consistency of 0.01 to 0.08 percent
in manufacturing. Multilayered, often with embedded corundum.
Use

Thermo paper

Currency

Characteristics	Paper with one-sided self-adhesive coating. High elasticity, since it is creped within
the wet end of the paper machine. Easily torn.
Use

Wet laid
nonwovenE.g., address stickers, product labels, price tags.

Characteristics	Anti-counterfeit paper made of cotton fibers with integrated security features.
Soil resistant and waterproof.
Use

Masking tapeE.g., bank statements, sales slips, admission tickets, baggage labels.

Characteristics	Label paper has an adhesive coat on one side. Low basis weight of the base paper,high coat weight. Release paper serves as anti-adhesive paper for label paper.
Silicone-coated and very smooth.
Use

Banknote paper

Indelible surfaces, e.g., laminated floors.

Characteristics	Paper with thermo-sensitive layer. This layer reacts to the influence of heat;
the contact areas turn black.
Use

Label paper /Release paper

E.g., furniture surfaces, laminate, interior fittings of buildings and vehicles.

Protection against color or paint spots during renovation, painting and lacquering.

Characteristics	Fleece with homogeneous controlled porosity. Production on an inclined-wire machinewith very low stock consistency. Among the wet fleeces are many different grades.
Use	E.g., tea bags, textile fleece materials for the medical and hygiene industry,gasoline filters, glass nonwovens, wallpapers, overlay paper.

Cigarette paper

Characteristics	Very light papers that are taste and odor neutral and food safe. Differentiation
between tipping paper, filter wrapping paper and cigarette paper. High technologicalrequirements such as porosity, opacity and printability.
Use

Flexible
packaging
papersCigarette industry

Characteristics	Uncoated and coated papers and kraft paper serve as basic material.
Depending on the purpose of its use, the paper can be lined with plastic,aluminum or other materials.
Use	E.g., bakery bags, serving packages for food such as sugar or soups, package inserts,
gift paper, tote bags.

Special Issue I 2008 I Voith Paper I twogether

51

News magazine for theinternational clientele,
partners and friends ofVoith Paper

Special issue Published by:Voith Paper GmbH & Co. KG
Editor:Anja Lehmann
Marketing Papiermaschinen Grafischund Spezialpapiere
Voith Paper GmbH & Co. KG
St. Pöltener Straße 43
89522 Heidenheim, Germany
twogether.voithpaper@voith.com
http://www.voithpaper.de
Design, layout and typesetting:Beate Hornischer
Corporate Marketing
Voith Paper Holding GmbH & Co. KG

Special issue, December 2008

Copyright 12/2008: No part of thispublication may be reproduced or copied
by any means whatsoever without theexpress permission of the editor.
The photographic material on pages
15, 16, 21 and 23 is courtesy of Interprint.

Printed on chlorine-free bleached paper manufactured with Voith Paper machinery.

Voith Paper