JAPAN TAPPI JOURNALVol.
August 2004 Abstracts
The Latest ID-Screen & FiberNet with ID-Technologies― Intermediate Deflocculation & Dilution
Device for Simplification and Power Saving of Screening Process ―
Aikawa Iron Works Co., Ltd.
ID-Screen is the latest screen equipped with ID-Technologies (Intermediate Deflocculation & Dilution
Device) which breaks the flock of fibers & small flakes and dilutes the reject
stock consistency for recovering 100% passage efficiency of screen basket. With
ID-device, the 2nd or the 3rd processing became possible in the one set of ID-Screen.
FiberNet is the latest reject treating screen which also applied the ID-Device.
ID-Screen & FiberNet realize dramatic simplification and power saving of
SiriusTM: High Performance Reeling Concept
Application Engineering Dept. Voith IHI Paper Technology Co., Ltd.
To fulfill the wide varieties and precise requirements of paper industries,
future paper machine concept needs comprehensive and flexible solution considering
the context process. Voith Paper offers “One platform concept” to cover the all
customer requirements. This concept contains the special components for each
section as well as total platform for the processing. For reeling component,
SiriusTM covers needs of advanced reeling requirements for all paper and board
grade. This characteristic issue is the one nip control via the Senso-reel drum.
The nip load is continuously applied without changing the loading system. SiriusTM
winding system allows maximum variability in the selection and application of
all winding parameters. This description shows our new reeling concept for the
most modern paper machine.
The Application of Novel High Cationic Charge Density Dispersion Polymers for
Paper Chemical Group, Shonan Research Center, HYMO Corporation
We have developed novel cationic dispersion polymers obtained by graft polymerization
of acrylamide and (meth) acrylate onto polyalkylene polyamine. Specific properties
of these polymers are not only high cationic charge density such as polyalkylene
polyamine on the present market and also wider molecular weight distribution,
higher polymer concentration, lower product viscosity and higher solubility.
The monomer components and polymerization processes have been carefully designed
and optimized for various applications of wet-end. As a result, several line-up
products have been prepared; Himoloc MT series as pitch control agents, Himoloc
FR series as drainage aid and Himoloc SR series as retention aid respectively.
These products are expected to help paper mills achieve stable paper making proceeding
by controlling pitches and anion trashes, and increase paper making productivity
by higher retention and draining rate in the wire section, by higher squeezing
rate in the press section and by higher drying efficiency in the dryer section.
Improvement of Blade Former Performance with VentaShoeTM Technology― Upgrade
Path to Next Generation Blade Former: MH-Former iFB ―
Mitsubishi Heavy Industries, LTD., Paper & Printing Machinery Division
Hiroshi Iwata and Kazuhiko Masuda
Mitsubishi Heavy Industries, LTD., Hiroshima R&D Division
Mitsubishi Heavy Industries, LTD. has developed a new technology that combines
the best aspects of roll-blade and pure blade forming. This new technology consists
of replacing the initial forming zone with a grooved smaller radius blade design.
Rework to a former and headbox is minimal.
As in roll forming, the VentaShoeTM traps the jet more symmetrically with a
positive angle to the wires that reduces the jet impingement sensitivity. Reduction
in jet impingement sensitivity provides easy operation without any defects such
as light spots. The blade drainage section provides the superior formation of
a traditional blade former.
There are currently three papermachines utilizing this new technology. The first
started up in North America in 2001 then the second and third started up in China
and Japan respectively in 2002. All have been demonstrating many benefits in
terms of paper qualities and papermachine operation.
A Study on Pigment Coated Paper Produced by High Speed Curtain Coating (2)
Kazuaki Ito, Hisashi Matsui and Atsushi Higuchi
Polymer Research Laboratories, JSR Corporation
Curtain coating is the non-contact coating method which liquid sheet falls freely
onto the substrate to be coated. This coating system is very simple and has many
advantages in easiness of operation, production efficiency and so on. In addition
of these, recent works have been reported that curtain coating provides a very
good coverage against coated surface expectively. In spite of the many advantages,
curtain coating has not been used for the pigment coating because of the various
problems occurred under the high speed condition.
In this paper, we report the influence of roughness character of the base paper
surface and coating color properties on the above problems. We also report the
character of high speed curtain coated paper surface and these printing properties
compared with blade coated commercial A2 or A3 grades.
A Study of Sheet Gloss Part 2
Latex Research Center, Nippon A&L INC.
The tendency to improve the quality of coated paper becomes more and more marked
in these years. In connection with this, the demand of increasing sheet gloss
of coated paper is also rising. In our previous paper, we studied the relation
between sheet gloss and surface roughness of coated paper and found that sheet
gloss was highly affected by surface roughness. The higher the smoothness of
coated surface, the higher the sheet gloss.
In this paper, we focus on the effect of volume change of coating color and
constriction of base paper during drying process on surface roughness. To study
the properties of coating color and the constrictions of base substance, coating
colors are prepared changing in total solids, pigments and water retention agents
and are coated on base paper and polyester film.
The result shows that sheet gloss of coated paper depends strongly on volume
change of coating color during drying process ; the smaller the volume change
of coating color during drying process, the higher the sheet gloss of coated
paper. This tendency is same in case of coating on base paper and coating on
polyester film. Namely, the coating color, the volume change of which is small
during drying process, gives high sheet gloss to the coated paper and such influence
is superior to that of the constrictions of base paper.
Application of SAQR to Modified Cooking Processes
Kawasaki Kasei Chemicals Ltd.
SAQR has been used as a cooking additive in many KP mills. This process is known
as "Quinone Cooking". This paper shows how SAQ is applied to recent
modified cooking processes. In order to make conditions of laboratory test similar
to the ones of a real digester, we developed a small scale digester in which
addition and extraction of cooking liquors are possible.
Using this equipment, the following results became clear.
1) Addition of SAQ at the top of digester is most effective. The effect of SAQ
is decreased if it is added after the start of cooking. Also divided addition
of SAQ is not efficient.
2) When SAQ is added to the top of digester, the divided addition of white liquor
doesn't influence the effect of SAQ.
3) The amount of extracted SAQ from a digester accompanying the extraction of
black liquor is very small. Even if some of SAQ is extracted with black liquor
from a digester, the effect of SAQ is scarcely influenced.
Fundamental Knowledge of Adhesion Phenomena and Application
Seiya Okamoto, Munetaka Mukasa and Isao Yoshimura
Adhesive tape products are common in consumer and industrial use. And they are
used massively in Paper Manufacturing Industry. But we found the customers who
don’t know always the properties of adhesive products, then they encounter difficulties
when choosing tape-products or solving their problems.
In this session I’ll give explanations about the following features based on
the view point of designing adhesive-tapes for Paper Manufacturing Industry.
1) Fundamental knowledge of adhesion phenomena.
2) Application knowledge for actual use.
3) Practical example of adhesive tapes for each paper manufacturing process.
4) Introduction of tesa new tape product “EasySplice Winderline”.
Improving Runnability of Papermaking Machine through Optimization of Wet-end
Operation Part II
Masa Taniguchi, Koichi Tadaki, Munetoshi Yamaji, Shigeru Kurose and Kenji Tsunekawa
Chemicals for Pulp & Paper Div., Technical Dept., Somar Corporation
Diversification of recycle fiber sources and concern on environmental issues
in paper industry in recent years makes papermaking operation more troublesome.
Common use of Alum in acid papermaking has been reduced due to the trend in neutral
conversion and scale deposition. Further improvement in wet-end operation and
cost reduction are the subject of total machine operation. In particular use
and effectiveness of various wet-end chemicals are under consideration.
Deterioration of raw material quality influences both machine runnability and
paper quality. It is difficult to achieve required objectives by a simple chemical
application. It is common that one quality improvement may cause other properties
to suffer. Due to complexity of the problem, the system using multiple chemicals
rather than single chemical gives more realistic solution.
The presentation last year entitled “Optimization of Wet-end Operation by Realizer”
demonstrated problem solving approach from the analysis of machine deposit resulting
from biological, inorganic and organic materials. Somar’s long history on biocide
application, and wet-end improvement by effectively capturing pitch and anionic
trash, and observing scale deposition and foam formation, allows new proposal
; total deposit control system.
Improved Process Control with STFI On-line Fiber― On-line and Laboratory Measurements
of Fiber Quality Based on Image Analysis ―
Product Manager, Lorentzen and Wettre AB
L & W STFI Fibermaster is a platform for pulp quality measurements. Measured
values are fibre length, width, shape, kink, fines, coarseness, bendability,
vessels, shives and freeness. The latter are recent developed extensions with
complementary technology developed to suit different applications. The base is
fibre analysis with cameras and image analysis. The development of measurement
technology was carried out originally at the Swedish Pulp and Paper Research
Institute (STFI). Many R&D laboratories in Scandinavia use L&W STFI Fibermaster.
Several on-line applications have now been implemented. The leading market pulp
producer in Europe has on-line measurement of fibre properties installed on all
of the Scandinavian mills.
Introduction of ITALIAN Waste Water Treatment into JAPAN
Akira Yamaguchi and Yasuyuki Murata
Industrial Machinery Div., HEIWA PAPER CO., LTD.
HEIWA PAPER CO., LTD. started the new business at April, 2002, such the introduction
of the treatment of industrial and municipal waters, sludge and rejects, from
O.M.C. Collareda Srl into Japan.
The main operating processes introduced at the present time, are three systems
such as FLOATION, SETTLING-FLOATATION, FILTRATION. Each system has a special
designedequipment, as follows,
1）FLOATATION system...DELTAFLOAT and TIGERFLOAT.
2）SETTLING- FLOATATION system...SEDIDELTAFLOAT.
3) FILTRATION system...GAMMAFILTER, OMEGAFILTER, DENSIDESC and SIGMA-FILTER.
are explained the structures and mechanics in detail in this paper.
The application sectors in this paper focus on the spcific and final treatments
for paper board mill waste water.
The 2004 Pan Pacific Conference― April 19〜10, 2004 at Canberra, Australia ―
Gyousuke Meshisuka*1,Toshiharu Enomae*1,Kawamura Ayano*2, Kazuhiro Kurosu*3,
Keiko Fujita*3 and Kunitaka Toyofuku*4
*1The University of Tokyo
*2Oji Paper Co., Ltd.
*3Nippon Paper Industries Co., Ltd.
*4Japan Technical Association of the Pulp and Paper Industry
2004 Pan Pacific Conference incorporated the 2004 Appita (18-22 April) was
held in Canberra, Australia. Mr. Meshitsuka, professor at Tokyo University and
Mr. Toyofuku, executive director of Japan TAPPI attended the conference as the
representatives of Japan TAPPI. At the conference 4 Japanese speakers noted
The representative from Paptac (Canada), Japan TAPPI, Korea TAPPI, TAPPI (Philippines),
Taiwan TAPPI were in the attendance at the conference, but the representative
from TAPPI (USA) was not.
Kraft Pulping Characteristics of Plantation-grown Acacia Mangium
Nippon Paper Industries CO., LTD., Pulp and Paper Research Laboratory
Nippon Paper Industries CO., LTD., Fushiki Mill
The first large-scale afforestation of Acacia mangium was started in 1991 at
Provinces of South Sumatra, Indonesia. Prior to the construction of a new pulp
mill, kraft pulping characteristics of plantation-grown Acacia mangium was investigated
in our laboratory. It was found that pulp yield was very high and was comparable
to Eucalyptus globulus. Acacia mangium pulp had high brightness, low dirt and
high viscosity. It was a short and thin-walled fiber, and was valuable for its
ability to produce paper with low bulk, high opacity and good smoothness. In
1999 the Musi Mill in Indonesia was constructed and is currently producing full
bleached kraft pulp at a rate of 450,000 tons per year. Major applications are
woodfree printing paper, lightweight coated paper, tissue paper, and white board.
Keywords: Acacia mangium, kraft pulping, afforestation