JAPAN TAPPI JOURNAL Vol.61
No.10
October 2007 Abstracts
Latest Technology of GL&V/KAWANOE
-SCREEN, CLEANER, BTF System-
Brian J. Gallagher
GL&V Pulp Group Inc.
The name GL&V, which stands for Groupe Laperriere & Verreault,
is not yet very well known in the Pulp and Paper Industry around
the world, but it is a company made up of many familiar names in
the industry. Companies such as IMPCO, Beloit Pulping, and Celleco
are now all part of GL&V, and these have been combined to create
a supplier with a complete and broad range of products for the industry.
GL&V is now working together with Kawanoe Zoki to serve the Pulp
and Paper Industry in Japan. Besides selling new equipment, Kawanoe
Zoki and GL&V are ready to support all existing equipment previously
sold by IMPCO, Beloit Pulping, or Celleco.
Preventive Measures for Spots Caused by Dryer-fabric Deposit
Daiki Hosaka
Sales Engineering Dev., Maintech Co., Ltd.
Spot problems originate from deposition of pitch, stickies
and latex in the dryer section is becoming a critical problem under
high recycled pulp furnish, closed system and alkalization conditions.
These spots lead to production and quality problems such as an
increase of broke and joint work. To date, not a few pitch control
programs have been tried, high-pressure fabric (canvas) showers
have been developed. However none of them have met with industry-wide
acceptance.
Maintech has developed a spot prevention program, a total solution
that passivates all surfaces in the paper machine where the deposition
could increase spots. The resulting surface passivation prevents
depositions on wire, felt, press rolls, cylinder, fabric and calendar
rolls and drastically reduces the number of spots on paper. Mills
can take considerable advantage of this program. Elimination of
deposits in the paper machine reduces not only the number of joints
in the finished rolls but also reduced tonnage and down time for
M/C cleaning. This paper reviews an investigative method of spot
generation from dryer fabric deposition. Case histories illustrating
benefits in news print and liner board M/C are presented.
Defoamer for KP
-FOAMLEX E Series-
Mitsuru Komatsu, Takashi Tanaka and Yuichi Tomoda
Paper & Pulp Group, Specialty Chemical R&D Department,
Research & Development Division, NICCA CHEMICAL CO., LTD
Recently, anti-foamer agents in Kraft-Pulp process
are significantly required high performance and efficiency. Their
bases are moving from mineral oil to silicone compound.
We, Nicca Chemical Co., Ltd., developed and launched a silicone
emulsion anti-foamer agents, named Foamlex E series. The main content
of these agents is the modified silicone, which is the mixture
of the silicone compound and our own surfactants manufactured with
unique self-emulsifying process and doesn’t remain in the pulp.
Foamlex E series effects high performance for anti-foam, good emulsion
stability and reducing black liquid in pulp during filtration.
We continue to develop of these anti-foamer agents in KP process
based on modified silicone emulsion to provide unique characteristics
and high performance in a paper and pulp industry.
Effects of Alkyl Chain Structures in Alkyl Ketene
Dimer (AKD) Sizing Agents on Paper Properties and
Machine Runnability
Kazuki Nagao, Hitoshi Ando and Tetsuya Hara Research and Development
Division, SEIKO PMC CORPORATION
Alkyl ketene dimer (AKD) emulsion sizing agents have
been widely used in alkaline papermaking systems for various paper
grades from slack-sized to hard-sized papers. Various kinds of
AKD sizing agents have been available in Japan. These sizing agents
contain AKD waxes with different chain lengths of linear alkyl
chains as raw materials. Recently, we have developed novel sizing
agent of liquid-type AKD with branched alkyl chains and placed
it on the market in Japan. Selections of AKD sizing agent appropriate
to each grade of papers and papermaking conditions are crucial
to improve paper properties and machine runnability. Thus, to do
this, it is important to understand various kinds of available
AKD sizing agents including liquid-type AKD. In this paper, physical
properties such as melting point and crystallization temperature
of AKDs themselves with various chemical structures and their hydrolysis
products are described. The physical properties of their emulsion
sizing agents are also described. Then effects of chemical structures,
i.e. chain length and topological structure, on paper properties
such as sizing degree and friction coefficient and on the lamination
coating in the finishing process are discussed. Finally combination
usages of AKD sizing agent and other paper chemicals such as cationic
polymers are exemplified.
Introduction of TAPIO Analyzers
- PMA, TS-profiler, and Lab profiler BCX -
Yoshiyuki Kawabata
Customer Service, NOMURA SHOJI Co., Ltd.
To reduce variation in product quality in paper production field
is one of the most important control items to win in the tough
competition in the global market.
In the product range of “TAPIO Profile Analyzer” supplied by TAPIO
Technologies Oy, a paper analyzer manufacturer in Finland, they
have a line-up of PMA (Paper Machine Analyzer), TS-Profiler and
BCX.
Those analyzers catch not only variations in CD direction as well
as MD direction but also find out and sort out variations which
are complicatedly entangled in both CD and MD directions from seemingly
irregular variations, and provide users of the analyzers with useful
and effective measures to locate and give solutions to a questionable
part in the paper machine that has produced a cause of quality
variations, and also review control parameters for their optimization.
TAPIO Profile Analyzers have been introduced in not only many paper
mills in the world but also major paper machine manufacturers such
as Metso and Voith. The measurement method with TAPIO Profile Analyzer
is widely adopted as defect standard in the paper industry and
as a standard measurement method to verify performance specifications
for a new paper machine and a rebuilt machine as well.
This article introduces the outline, features, difference and advantage
from the conventional methods, analysis method, and typical problems
found from the measurement results.
Octopus Stock Approach System
Masaaki Inaba and Norihito Toda
Kobayashi Engineering Works, Co., Ltd.
Making the paper’s basis weight profile in cross direction
as even as possible, is one of the most important common needs
in paper making, printing and converting processes.
Octopus Stock Approach System (Octopus) with compact and easily
accessible design, has become a dilution control system to be applicable
not only to multi-ply paperboard machines but also to modern high
speed paper machines.
In the north American countries, more than one hundred units of
Octopus are in operations, supplied by KADANT-AES, our licensor
of the system in U.S.A..
In Japan, 4 units of Octopus of 3 mills are now in operation successfully
beyond our customers’ expectation. Another several units of Octopus
will be started up within next year including China’s latest brand
new linerboard machines.
Anaerobic Treatment of Various Wastewater from the Process of Manufacturing
Pulp
Shigeru Noritake and Seiji Imabayashi
Asahi Breweries Co., Ltd.
Kazuo Kamiji
Asahi Beer Engineering Co., Ltd.
Hitoshi Kagawa, Atsushi Tanaka and Hajime Takahashi
Oji Paper Co., Ltd.
Fumio Obama, Akinori Kato and Atsushi Shimamoto
Sumitomo Heavy Industries Co., Ltd.
Usually, aerobic treatment is applied to the treatment of wastewater
from the process of manufacturing pulp. This time, the anaerobic
treatment was applied to evaporator drain, deinked pulp wastewater,
and bleaching wastewater, with a pilot test plant. The result,
high COD removal and high load were obtained in anaerobic treatment
of the drain from evaporator though its drain contains inhibitory
substances. On the other hand, gas recovery in case of deinked
pulp wastewater is smaller than in evaporator drain, and COD removal
is small in case of bleaching wastewater.
New IT Solution Transforms a Tacit into Visible Knowledge
- Text Mining Software REXION Pro -
Motomi Kohata
Advanced Automation Company, Yamatake Corporation
This paper introduces Text Mining technology and describes
the application of knowledge management for a manufacturing industry
aiming at extracting know-hows and transforming an executable pattern.
The algorithm of Text Mining software “REXION” simulates human
recognition and processing of document classification (clustering)
for bags of unmanaged documents so that large amount of document
are automatically clustered.
When various documents are analyzed/clustered with this software,
it generates the information map which enables human can understand
whole document space and executes correlation analysis between
text and attribute/item those data are recorded in simultaneously.
The above-mentioned feature is made the best use of, the maintenance
record of the product, the contacting log at the call center, and
the engineering documentation, etc. are analyzed, and useful knowledge
can be obtained.
Study on Print Abrasion Trouble in Ink Layer of Matt Coated Paper
Takeshi Watanabe, Shigeo Yamanaka and Nobuhiro Matsuda
Polymer Research Laboratories, JSR Corporation
Matt coated papers form a significant and increasing
segment of coated paper sector because they fulfill the demand
for a paper with high brightness, less glare and moderate gloss
to get easy readability. Conventionally, matt coated papers have
been produced by compromising between brightness, gloss and print
abrasion. Especially, in matt applications, a high amount of ground
calcium carbonate (GCC) gives good brightness, but relatively results
in low print abrasion (also known as smudging or scuffing). The
print abrasion which occurs during the bookbinding process or transportation
process is critical problem for matt coated paper. Ideally, a matt
coating system would produce a high brightness coating with good
print abrasion. Optimization of particle size, particle shape of
pigments, blends of pigments and varnishing are therefore used
to try to reach a balance of properties and to eliminate this problem.
In this paper, we considered that print abrasion was influenced
by surface profile of coating layer; we study on the phenomenon,
investigated clarification of the key factor of print abrasion
trouble with using scanning white-light interferometer. In addition,
this paper presents a new approach to matt coated paper design
based on plastic pigment components. As a result, it was found
that coated paper surface profile influenced to print abrasion;
furthermore it was shown that the new pigment system could improve
print abrasion without affecting matt coated paper performance
like moderate gloss, resulting in a coarse blocky plastic pigment
was used as a “spacer” to reduce print abrasion.
Keywords: matt coated paper, print abrasion, smudging, scuffing,
surface profile, plastic pigment
How to Save Money, Increase Efficiency and Meet Regulations by
Limiting Seal Water Usage
Ryosuke Baba
Mechanical Seal Engineering Dept., John Crane Japan, Inc.
Water consumption not only represents a significant
expense for pulp and paper mills and that alone is enough reason
for them to look at ways to cut down its usage, but also is increasingly
being recognized as a valuable natural resource and industry therefore
finds itself under pressure to reduce its water consumption. Increasingly
tight environmental regulations covering discharges and pollution
are adding to the pressure to use less water and threaten major
penalties for those who break them. Mill operators are increasingly
being encouraged to question every incidence of water usage and
to ask if their total consumption can be reduced. Yet they cannot
afford to let this impact on their production or to degrade their
levels of efficiency.
Modern technology has created opportunities for water savings in some unlikely
areas, prominent among which is the water used in mechanical seals.
For Sound or Noise in Industrial World Part II
-It Thinks about the Noise as Part of T.F.O from SKF-
Yasuhiko Yamasaki
Condition Monitoring Service division, SKF Japan
When it explained last “For sound or noise in industrial world”,
the generation of the sound and the case were presented. It explains DGBB by
centering as the part 2 this time and the mechanism of the movement and the case
with the trouble are explanation. As for the damage of the bearing, it is necessary
to think about actions to do at once by knowing at the first time and actions
to make to the next overhaul. The sound in which the cause of needless environment
deterioration is made can be decreased by executing it with the decrease of the
energy loss of the machine.
Report of 2007 TAPPI Papermakers Conference
Koichi Yanai
Pulp and Paper Research Laboratory
Nippon Paper Industries Co., Ltd.
The first joint 2007 TAPPI Papermakers Conference / PIMA International
Leadership Conference was held in Jacksonville, FL., USA from March 12 to 15.
There were 73 presentations in 3 sessions in TAPPI and 28 presentations in 3
sessions in PIMA. In this report some of the presentations in TAPPI Conference
were reviewed.
A Report on PulPaper 2007
-June 5-7, 2007 at Helsinki, Finland-
Keihachiro Nakajima, Motoi Chiba and Yosuke Uchida
Oji Paper Co., Ltd.
Koji Okomori
Nippon Paper Industries Co., Ltd.
Kunitaka Toyofuku
JAPAN TAPPI
The PulPaper 2007 Conference & Exhibition was held in Helsinki, Finland on
June 5-7, 2006 hosted by PI (Finnish Paper Engineers’ Association). There were
48 special presentations on 8 sessions. Reflecting of spirit of innovation of
PI and Finnish pulp & paper industry, there were 500 participants from many
countries in the world.
Special mention is enormousness of the attached exhibition. In the area of more
than 10,000m2, 500 exhibitions were performed. Before and after the meeting,
we visited research organizations, paper mills, a felling spot, a tree-nursery
in Sweden and Finland.
Application of Micro Bubble Treatment Technology to Paper-making Effluent Treatment
Yoshihiko Saijo and Makoto Iwasaki
Pulp and Paper Research Laboratory, Oji Paper Co., Ltd.
It is said that a region of high temperature (thousands of ℃) and high pressure
(thousands atmospheric pressure) rises, at the moment when a micro bubble disappears
in liquor, and that microorganisms and chemical substance in liquor can be decomposed
in the region. In this report, suitable conditions for generating most bubbles
whose diameter are 50 micrometers or less underwater were found out using a micro
bubble generator (revolution type) at first, and then they were applied to effluent
treatment. Although SS decreased approximately by 60% by floatation with the
micro bubble, the reduction of COD was not so remarkable. The reduction of COD
is considered to be caused by reduction of SS and is not based on decomposition.
As a result of applying ozone to micro bubble processing, COD decreased by 22%
at the ozone concentration 125 g/m3, and the decrease was more than in case of
conventional bubbles. COD in this case was measured after filtration. The cause
of the not so large reduction (22%) of COD is thought that a region of high temperature
and high pressure did not rise at the moment when a bubble disappeared．
Keywords: micro bubble, effluent treatment, reduction of COD, reduction of SS,
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