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Volume 35, Issue 1
Displaying 1-26 of 26 articles from this issue
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[in Japanese]1981 Volume 35 Issue 1 Pages 1-2
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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[in Japanese]1981 Volume 35 Issue 1 Pages 3-8
Published: January 01, 1981
Released on J-STAGE: January 29, 2010
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[in Japanese]1981 Volume 35 Issue 1 Pages 9-11
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Masayoshi Ninomiya1981 Volume 35 Issue 1 Pages 12-14
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Yoshika Nomura1981 Volume 35 Issue 1 Pages 17-21
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSInOctober 1974 we took the lead in the world infinding a remarkable improvingeffect of anthraquinone, anthrahydroquinone or1, 4-dihydro-9, 10-dihydroxyanthracene on the various pulping processes.
The cooking method using a quinone compound as cooking aid meets the current needs and has become a worldwide subject of investigation.
In Japan, this process is seemed to be entering a stage of rapid propagation throughout the pulpmills.View full abstractDownload PDF (470K) -
Junzo Nakano1981 Volume 35 Issue 1 Pages 22-26
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThis review summarizes how delignification mechanism with alkali-anthraquinone (AQ) have been studied by wood chemists in the world. It is concluded that AQ not only stabilizes poly saccharides toward alkaline degradation but also interacts with lignin causing its rapid and extensive removal.
In future alkaline cook ing, a new cooking addiditive superior to AQ may be brought to light.View full abstractDownload PDF (566K) -
Junji Ohsawa1981 Volume 35 Issue 1 Pages 27-31
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSOur previous reports were summarized in this paper.
It is confirmed that various characterization methods proposed so far such as L and S factors, settling rate or wet web strength can reasonably predict mechanical pulp quality.
To express mechanical pulp properties more clearly, fiber length distribution was represented by 2 parameters, d and n, obtained from Rosin-Rammler's equation, and CSF80/150 was chosen as a S factor. For each pulp properties the 3-dimensional iso-value curves with d, n and CSF, 80/150 axes were obtained using a certain experimental technique.
Mechanical pulp properties could be roughly classified into 3 groups as follows ; 1) freeness, drainage time, density, scattering coefficient and porosity which depend on specific surface area, 2) wet web breaking length, burst factor and breaking length which depend highly on CSF80/150, 3) tear factor which depends mainly on long fiber content.View full abstractDownload PDF (628K) -
Shigeru Chiba1981 Volume 35 Issue 1 Pages 32-35
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSA brief report on the tree breeding is given both historical view before 1954 and recent work done after 1955, in the selection of plus trees, establishment of seed orchards and progeny tests on the main tree species in Japan. In some species already reached to provide improved seed or cuttings for commercial planting.
Researches on tree genetics have been carrying on Larix, Abies and Picea species in northern district, and Cryptomeria, Chamaeciparis and Pinus species in Honshu district. Breeding for resistance to climatic, diseases or pests damages and wood quality have also been progressing. Many genetic informations are accumulating that can be contributed not only for genetic research but also providing improved materials for commercial planting.View full abstractDownload PDF (596K) -
1981 Volume 35 Issue 1 Pages 36
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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[in Japanese]1981 Volume 35 Issue 1 Pages 37-38
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Akira Yamaguchi1981 Volume 35 Issue 1 Pages 39-44
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSMOXY System I has been installed as the mill fourh in the world at Yufutsu Mill of Sanyo-Kokusaku Pulp in Oct. 1979. Since then, we have studied it to establish its optimum operating conditions. Based on this study, we could obtain the enough know-how and experience on the production of PS-pulping.
The results are summarized as follows.
1) Equipment
Both the equipment and instrument are no trouble in the past year.
2) Operation
We now have obtained the optimum operatng conditions on the PS-pulping through One year experience. We are aiming at 5560% oxydation of the sulphide in the white liquor and will give us 67 g/l of polysulfide sulphur.
3) Quality
Within the limits of our yield gain, the effect on pulp and fine paper qualities are almost neglective.
4) Air Pollution (Odourous troubles)
We have meassured the concentration of odourous gases in the air and found that the concentraion is equal or lower compared to before.
5) Economical Revenue
We still now continue to obtain the trusty data on the yield gain. According to our intermediate results, we can say that yield gain gives us the satisfactor results.View full abstractDownload PDF (754K) -
Michio Kawamura1981 Volume 35 Issue 1 Pages 45-48
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSA new desulfur plant in a cross recovery system, which was developed by Taio Paper Co. and Hitachi, Ltd., has been operating successfully in the Mishima mill since December, 1979.
Ten tons per day of sulfur can be taken out of the green liquor. As this plant controls the sulfur balance without variation of production of KP and SCP, the system runs with low sulfidity and at the same time a high degree of stability.
With this plant, there is also less obnoxious odor. This system uses CO2 for carbonation of the green liquor, which is separated from the fuel gas with nomoethanolamine.View full abstractDownload PDF (404K) -
Tsuvoshi Kanazwa1981 Volume 35 Issue 1 Pages 49-55
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSHigh consistency pulper was developped by Aikawa Iron Works Co., Ltd.
The operating consistency in the pulper is around 15%, which is 3 times compared with 4 to 7% in case of Low consistency pulper.
Vertical flotation is cylindrical-vertical flotation machine developped by Feldmuhle in West Germany under cooperation with Lamort in France.
Both High consistency pulper and Vertical flotator have a marvelous effect for improving the quality and decreasing the power consumption, namely in the field of saving energy and saving raw materials in deinking system.
We are very pleased to be given a chance for introducing these machines in Japan Tappi meeting.View full abstractDownload PDF (8559K) -
Toshimitzu Takagi1981 Volume 35 Issue 1 Pages 56-62
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSAs the radiation loss from the lime kiln shell at Kasugai Mill had occupied as much as 15% of the oil consumption, we have been making a study of the adiabatic concrete having the lower thermal conductivity since 1978.
In order to reduce the radiation loss from the lime kiln, we introduced the adiabatic concrete instead of refractory bricks of the lime kiln at almost all the shell area in December 1979. As a result of this work, we could reduce the oil consumption by about 6%.
This report describes the development and the effect of introducing the adiabatic concrete.View full abstractDownload PDF (649K) -
[in Japanese]1981 Volume 35 Issue 1 Pages 63-65
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Chikara Sakanaka1981 Volume 35 Issue 1 Pages 66-71
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSOe Mill's No. 1 machine is the first twin wire, wide and high speed machine for Marusumi Paper Co.
Bel-Baie II Former was introduced to us after careful examination about the results at home and abroad, the nature of the operation, ans the quality of the product.
It took us a year and six months from decision to completion.
The machine has followed an almost normal course about nine months, since the trial run of it in January this year.
I want to introduce here an outline of the equipment and operation.View full abstractDownload PDF (595K) -
Akira Sano1981 Volume 35 Issue 1 Pages 72-79
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSSince original Ultra Former was firstly invented by T. Kobayashi-the founder of KobayashiEngineering Works, Ltd.-in 1965, we have been delivering Ultra Former Series one after another to the world market, ie, Ultra V (150 m/min), Ultra VI (180 m/min), Ultra VII (250 m/min), High Speed Ultra Former (350 m/min) and Super Ultra Former (500 m/min).
Until this stage, our efforts have been concentrated mainly on increasing production keeping better quality, however, the oil crisis which occurred, all of a sudden at the end of 1973, has deeply let us recognize the importance of saving energy and natural resources.
Ultra C Former (700 m/min) and Ultra Twin Former (700 m/min) which utilize centrifugal water removal, were born to meet these particular demands.
Now, by combining these Formers, or in combination with Fourdrinier machine, any kinds of applications to paper and paperboard manufacturing, have become possible and further more, for targetting maximum saving of energy and raw materials, we are planning to apply high consistency forming technology to our Ultra Former Series.View full abstractDownload PDF (1291K) -
Hiroshi Kataoka1981 Volume 35 Issue 1 Pages 80-86
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSSectional Drive Slitter-Rewinder
We have focused the goal of study for Slitter-Rewinder on “quality control of rewound roll”.
1. Control of infeed tension to avoid the bringing of residual stress of the elastic sheet.
2. Nip-pressure control of rewind roll to obtain the optimum friction of the sheet layer by controlling the air which will be contained in the rewound sheet and cutting the tension between the infeed and rewind.
3. Rewind tension control to make the tapered tension control of the rewind possible with the center drive rewind.
Above three factors are the principal rewind functions.
At present, as these factors such as the sheet properties which affect the roll quality, rewindtension, nip-pressure and unwind tension are invisible, we have to assure the method of theoretical analysis, and study deeply about the control system. And for the higher quality, we are intending to develop the higly automated adaptable control.
Roll Wrapping Machine
We concentrated on the development of the automatic wrapping system to correspond with random size rolls, and we have reached to the practical level by repeating the modification. Yet, we have some problems which have to be solved. We will make an effort to solve them.View full abstractDownload PDF (730K) -
Kikuo Takano1981 Volume 35 Issue 1 Pages 87-91
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSIn Jujo Paper Co., Ltd. Kushiro Mill new No. 8 paper machine, which has a wire width of 7, 100 mm and design speed of 900 in/mm, was builtin 1977. Automation and mechanization of the winder was planned so that we can rewind the paper produced on No. 8 paper machine speed of 900 m/min into 25 reams by one winder. And it was realized by adopting some systems ; automatic constant length rewinding system, automatic roll kick out system, automatic core-taping system and sequencer to control these systems.
As the results of these improvements, the winder work became so easy this paper machine could be operated by only 6 men for one sift. At the beginning we had some troubles, but we settled them soon. At present this type winders been running smoothly on our No. 7 and No. 8 paper machine.View full abstractDownload PDF (726K) -
[in Japanese]1981 Volume 35 Issue 1 Pages 92-93
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Suketada Ito1981 Volume 35 Issue 1 Pages 94
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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Keiichi Kaeriyama1981 Volume 35 Issue 1 Pages 95-101
Published: January 01, 1981
Released on J-STAGE: April 23, 2010
JOURNAL FREE ACCESSIt was the first time in the Japan pulp and paper industry that a process computer for controlling a pulp plant was installed at the Kushiro Mill of Honshu Paper Co., Ltd. in September, 1965.
Now there are seven sets of process computers in the mill which consist of two sets for the pulping process, four sets for the paper making process and one set for the power plant. The process computer for the Kamyr digester process is the most famous in the world. Moreover, Kushiro men have developed the soft ware of the microcomputer for measuring and displaying the process by putting together microcomputer circuits by their original technology.View full abstractDownload PDF (925K) -
Yukinori Ichikawa1981 Volume 35 Issue 1 Pages 102-108
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe Yufutsu Mill of Sanyo-Kokusaku Pulp Co., Ltd. installed a new No. 5 paper machine in 1979, which had the operation management and control system with computers, called the SKY system.
The whole management for paper making from preparation department to finishing department has been controlled by this system.
The SKY system possesses various kinds of functions, such as production management, operation guide, process control and management information system.
Based on one year experience, we found that it had improved the rate of operation of paper machine and increased the efficiencies of production. It also had proven that it was a quite valuable and to improve the quality of end products and reduce the volume for the repulping.View full abstractDownload PDF (1030K) -
Hiroshi Matuntoto1981 Volume 35 Issue 1 Pages 109-114
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe computer control system (by Measurex Co., Ltd.) was made to save energy consumed to power Boilers and Turbines.
This system was able to increase generater power and total efficiency for Steam Load Optimization.View full abstractDownload PDF (492K) -
Akira Nomoto1981 Volume 35 Issue 1 Pages 115-119
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSMicroprocessor techniques are very powerful means for the pulp and paper manufacturing processes. This paper describes the application of them utilized effeectively in Jujo Paper Co. Faults in paper web such as holes are troublesome in coating operation, so the information of the fault detector on paper machine must be passed to the the succeeding processes accurately. An outline and problems of the Fault Control System are discussed in developing an integrated microcomputer system for coating paper process.View full abstractDownload PDF (763K) -
Lathar Pfalzer1981 Volume 35 Issue 1 Pages 126-131
Published: January 01, 1981
Released on J-STAGE: November 13, 2009
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