TAPPI JOURNALVol. 57, No. Novuary 2003 Abstracts
The Latest Improvement for High Consistency Pulper & Detrashing and Sticky
Contamination Analyzing Equipment "SCAN"
Aikawa Iron Works Co., Ltd.
High consistency pulping providing a helical rotor and detrashing performance
(This technology was first developed by Aikawa in the world about 25 years ago.)
is now recognized as one of the best technologies for deinking system, and many
stock preparation machinery suppliers are manufacturing similar equipment globally.
Recently this technology has been dramatically improved, specially for energy
saving and contaminant removal, and was awarded Sasaki Prize by Japan Tappi on
2002 as the best development of the year. This paper reports about the latest
technology for the High Consistency Pulping and Detrashing System and also reports
for interesting equipment to analyze sticky materials contained in the stock,
which is called " Stcky Contamination Analyzing Equipment, SCAN".
The Practical Examples of Paper Machine Operation Using "MOAS"
Sinko kagaku Co., Ltd.
Nippon Paper Unitec Co., Ltd.
The technique to take the real-time data of wet paper web moisture and the two
parameters -" Heat Transfer Rate Coefficient "and" Pressing Coefficient "-
which related to the moisture makes it possible paper machine to be controlled
reliably and precisely, and improves the productivity.
Additionally, the accumulation of time−series files which contains simultaneously
moisture data at different parts of paper machine, above−mentioned parameters
and general operation data leads to systemize quantitatively the reason for moisture
variations. This systemization standardizes the control action which traditionally
based on experiences or subjective factors, and rationalizes significantly paper
"Heat Transfer Rate Coefficient" and "Pressing Coefficient" are
the specific factors in "MOAS" ; "HTRC" is the specific characteristics
of paper which resulted from furnish composition and wire retention, affecting
hydrokinetically to dewatering performance at press section. "PC" reflects
quantitatively the dewatering performance at each press section.
Carbon Thinks as a Measure against Global Warming
Overseas Forestation Dep. Raw Materials & Purchasing Div. Oji Paper Co.,
This article illustrates the possibility of contribution to the measure against
global warming by Japanese Pulp and Paper industry and overseas forest plantation.
While the vast majority of pulp wood used in paper making originates from saw
mill residues and thinning, the industry has made a commitment to expand overseas
forest plantations in order to secure wood supplies and to contribute to the
Japanese Pulp and Paper companies together plan to establish 550,000 ha of forest
plantations, both inside and outside Japan by year 2010. As for Oji Paper Co.,
Ltd, it has a goal to establish 200,000 ha of overseas forest plantations by
2010. Overseas forest plantation projects not only create jobs, but help the
area in environmental improvements such as reduced salinity and reduced wind
erosions. In addition, cultural exchanges between Japanese expatriates and locals
take place. Recently, carbon absorption by forests is drawing more attention
toward forest plantations. While it is not clear how carbon absorption is accounted
and valued, Oji plans to help other companies which plan to develop overseas
forest plantation projects. Overall, forest plantations mean recycling of wood,
reducing the use of fossil energy while lessening the pressure to clear natural
Operate a Boiler System Designed to Combust Paper Sludge in Combination with
Chip Rubbish- Contribute to the Community, Conversion Fossil Fuel and Reduce
Energy Costs -
Power Section Tokai Pulp & Paper Co., Ltd.
In recent years Tokai Pulp ＆ Paper Co., Ltd. has made a concerted effort to
improve the natural environment, such as minimized the effect of the solid waste
that is released into the city. This means to increase wastepaper utilization
rate, and maximize the uses of recycled paper.
During the process of minimizes its impacts on the environment, the increased
of manufacture waste is also generated. With paper sludge/ chip rubbish steam
plant in place (number 10 boiler), Tokai Pulp & Paper Co., Ltd. in now able
to use the majority of its paper sludge by-produce, reducing both energy and
disposal costs. By using the paper sludge and chip rubbish as a fuel, Tokai Pulp & Paper
Co., Ltd. minimizes its impacts on the environment, reduces reliance on fossil
fuel related greenhouse gas emissions, and stability of the power generation.
Trial Plantation of Eucalyptus globulus Using Clonal Technology in Australia
Forestry Resources Australia office, Pulp and Paper Research Laboratory,
Nippon Paper Industries
Nippon Paper Industries has been developing the clonal propagation technology
of E. globulus by micropropagation to supply a high yield, quality, survival
rate and uniformity for plantation purposes. In 2000, our research laboratory
was established in Collie, Western Australia in order to try to produce clonal
plantlets by micropropagation. A photoautrophic culture in the rooting stage
produced more than ten thousand vigorous rooted-plantlets and enabled us to work
the culture under non-aseptic conditions. A low temperature plant tissue storage
method propagated enough shoots to provide for rooting with a regular amount
of work in the shoot propagating stage. These methods technically and economically
improved micropropagtion of E.globules for practical use. The micropropagated
plantlets were planted in plantations in Victoria and Western Australia. They
have shown healthy growth without any problems for the initial period.
Procedure for Obtaining CoC (Chain of Custody) Certificate of FSC Forest Certification
System in Mitsubishi Paper
Mills Limited Hachinohe Mill
Hachinohe mill，Mitsubishi Paper Mills Limited
Mitsubishi Paper Mills Limited (MPM) Hachinohe mill obtained Chain of Custody
(CoC) certificate under the rules of the Forest Stewardship Council (FSC) by
Scientific Certification Systems (SCS), organization approved to submit FSC certificate.
FSC Certification system is NGO based forest management certification system
and CoC certificate qualifies the products coming from well-managed forests.
With obtaining CoC Certificate, Hachinohe mill are allowed to put FSC-Logo on
it's certified products, such as coated paper and fine paper of which at least
30% of virgin fiber comes from well-managed forest.
The field inspection for Hachinohe mill was conducted on 14 July, 2001 by inspectors
of AMITA Corporation, Japanese representative of SCS, after spending 2 months
on designing control system and documentation according to the CoC standard.
The CoC certificate based on the assessment report was issued to MPM Hachinohe
mill on August 20, 2001.
This year, the CoC certificate for Hachinohe mill was expanded to include the
sales division and logistics division. Now MPM can manufacture and sell FSC-certified
coated paper and fine paper.
MPM is working to obtain FSC forest management certificate for MPM’s own plantation
in Chile and FSC certified wood chip will be shipped from the plantation by 2003.
Exhaust Gas Treatment System for Ozone Bleaching Process
Kitakami Mill , Mitsubishi Paper Mills Limited
Hiroshi Sanui and Kazuho Iwamoto
Market Development, Nippon Sanso Corporation
Reuse of the oxygen in the exhaust gas from ozone bleaching process is an available
technology for chemical saving. To use the residual oxygen effectively, it is
necessary to destruct the residual ozone, and to refine oxygen. In this paper,
we will introduce the newly developed exhaust gas treatment system for ozone
This system is composed of a packed type absorbing tower, pumps and fans. And
for absorbing agent we use alkali in the kraft pulping process, which contains
sodium sulfide for ozone destruction and caustic soda for carbon dioxide absorption.
This system is very simple, and almost free from corrosion, and the maintenance
is easy. And also as an ozone destructor, both equipment cost and running cost
are cheaper compared with the heating type one. These points are also discussed
in this paper.
New Process Producing Highly Concentrated Polysulfide Liquor (II)
Keigo Watanabe and Yasunori Nanri
Nippon Paper Industries Co., Ltd., Pulp and Paper Research Lab.
Kawasaki Kasei Chemicals Ltd., Research and Development Center
Chlorine Engineers Co., Ltd., Engineering dept.
A new electrolytic process to produce highly concentrated polysulfide (PS) liquor
from the white liquor has been developed. This electrolytic process can provide
two different compositions of cooking liquor, not only electrolytic oxidized
liquor (EOL) but also caustic soda, from the white liquor (WL) in the process.
By adding the EOL to the digester, a great improvement of pulp yields can be
obtained and required active alkaline can be reduced. In addition, combination
use of the electrolytic cell and modified cooking (MC) enhances both effects
of EOL. But a mill scale has not been realized because of high capital investment
and large electricity for electrolytic process.
To optimize the combinatorial use of EOL and MC economically, optimum balance
of PS and sodium sulfide in PS cooking liquor were discussed in this paper. Consequently
the amount of WL to be oxidized with electrolyzer was reduced. Also a new electrolyzer
was tested in long term. Successful results of the operations with pilot-scale
are shown in this paper. This new electrolyzer is expected simple enough even
in practical mill scale.
Through the optimization of the way of cooking, it is found that whole WL does
not have to be oxidized with electrolyzer. As a result of the development of
new simple and compact electrolyzer with high efficiency, required electricity
was economized and space for installation was reduced and acceptable capital
investments will be achieved.
Mechanism of the Fluting of Coated Paper in Web-Offset Printing? Approach from
Design of Paper to Improve ?
○Tetsuya Hirabayashi, Yukiko Suzuki, Yukio Tani and Daisuke Watanabe
Pulp & Paper Research Laboratory, Oji Paper Co., Ltd
In relation to the recent rapid development of web-offset printing, fluting
in web-offset printing is becoming a serious quality issue requiring an urgent
solution. Our study on this issue identified that fluting in web-offset printing
is a phenomenon where an imaged area had been buckled by a compressive force
caused by a combination of tension and contractile force during the printing
operation. Also, the number of the fluting in web-offset printing is determined
by the compressive force, the size of the imaged area and the stiffness of the
On Dec. 2001, we started to produce a new paper product which is free from the
fluting in web-offset printing on. It’s designed to have small contractile force
which is occur by drying of web-offset printing process.
The Development of functionality sheets- PBO (Poly(p-phenylene-2, 6-benzobisoxazole))
fiber sheet -
Technical Research Laboratory, Tomoegawa Paper Co., Ltd.
We have developed several types of functionality sheets made with polymer fibers
and metal fibers using the wet paper making technique. We have recently developed
the Poly (p-phenylene-2, 6-benzobisoxazole) (PBO) fiber sheet for printed circuit
This PBO fiber (ZYLON) is made by TOYOBO CO., LTD. and has excellent properties
such as high tensile strength, high tensile modulus, low moisture content and
high thermal resistance.
This report presents the way of making PBO fiber sheet, it’s property and PBO
pulp which is needed to make the PBO fiber sheet.
Barito Project, Operation Experience Pulp Manufacturing from Acacia Mangium
Production Manager PT TEL Musi Mill (Indonesia)
Mill Manager PT TEL Musi Mill (Indonesia)
The first large scale plantation of Acacia Mangium was begun 1991 at Province
of South Sumatra, Indonesia for the first time, by a Joint Venture Company composed
by PT. Barito Pacific Timber Corporation (BPT) and Forestry Ministry of Indonesia.
And a construction of a new Pulp Mill was started by a Joint Venture Company
between Indonesian and Japanese consortium. Nippon Paper Industries Co., Ltd.
participated in this project to provide technical and production assistance to
this mill for the long term of contract.
The Mill construction was begun September 1997 and completed November 1999,
and trial operation of the mill was consequently conducted May 2000, the commercial
production begun after the commercial transfer of a key to the Mill Manager.
It is our pleasure to have an opportunity to introduce the outline of the Mill
and a story from our experience.
Operating Experience of 9 PM
Geibo Mill, Japan paperboard Industries Co., Ltd.
The 9PM for board paper has been started operation at Geibo mill in Apr. 2001.
This was a substitute for the Osaka mill which was closed down in Dec. 2000 under
the reorganization of the board paper industry.
The production capacity is 494 t/d. The wire’s width is 5100mm and the operating
speed is max 550m/min.
Also the machine has some characteristics. For example high temperature and
high consistency disc dispersion system, shoe presses, JF sizer etc. So we are
able to supply the best quality board paper for the user.
I’d like to report an outline of this machine and the operating experience since
it was started up.
Operating Experience of High Brightness DIP System
Daishowa Paper MFG. Co., Ltd., Honsha Mill Fuji Div.
In Daishowa Honsha Mill, Fuji Division, we have 3 lines of DIP process which
amount of product is 630t/d. The current High-Brightness-DIP process, start running
from September 2000, makes it possible to brighten 75% of DIP.
In here we have Sprit-Flotation System, which is first trial in Daishowa. This
process is able to intensify ink rejecting by flotation cell, which set up in
front and back of hydrogen peroxide bleaching. This system can discharge ink
before it break up into minute particles, like less than 2μm. Therefore, it is
effective for manufacturing high brightness DIP. Now, we use mixtured of old
newsprint and old magazine, however, from the good result of our new process,
we are able to make the best use of any waste papers.
In this report, we will introduce system, operation experience and quality of
our New-DIP-Process of this two years.
Starting Up of Onsite PCC Plant and Experiences of Neutralized Paper Making
Shiraoi Mill, Daishowa Paper Co., Ltd.
Daishowa Paper Shiraoi Mill completed onsite Precipitated Calcium Carbonate
(PCC) manufacturing facility in June, 2000. We have planed to transfer from acid
to neutralized paper making in all paper grades except for news print and liner
board. PCC is used to make neutral paper and the decision was made to build an
onsite plant. A PCC manufacturing and supply agreement was signed with PCC manufacturer,
Specialty Minerals FMT K.K. (SMF), in the summer of 1999.
Specialty Minerals Inc. (SMI), a parent company of SMF, has an excellent reputation
as a producer of high quality PCC and is the largest producer with 2.1milliion
tons of PCC at their 55 plants located around the world.
In general, neutralized paper making can provide many advantages including less
degradation over time, higher brightness and opacity, and better printability.
On the contrary, some disadvantages include difficulty in keeping machines clean,
ink feathering, and high costs. Because of these disadvantages, we have limited
to apply neutralized paper making to PPC paper and special grade of fine paper.
We, however, were able to overcome these technical problems and, with the exception
of newsprint, we have decided to neutralize most paper grades.
At this time, we would like to present a general description of on site PCC
plant, and PCC characteristics. Also, we would like to present our experiences
in the transfer from acid to neutralized paper making.