JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 38, Issue 5
Displaying 1-10 of 10 articles from this issue
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  • Unused Aspen Wood Resouces in Province of Saskatchewan, Canada
    A Novel Story on a Combination of Pulp Production and Cattle Breeding
    Yusaku Fukuda
    1984 Volume 38 Issue 5 Pages 499-500
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.499
    JOURNAL FREE ACCESS
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  • The State-of-the-Art in Pulping Technology (VII) Technology on Recovery and Preparation of Cooking Liquor
    Akira Yamaguchi
    1984 Volume 38 Issue 5 Pages 501-513
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.501
    JOURNAL FREE ACCESS
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    This paper deals with forcussing on recovery processes and preparation of cooking liquor as the final report of this pulping technology series.
    1) As the attractive developing technology in recovery processes, there are reviewed washer equipment, evaporation and recovery boiler which contribute to save energy. And also it should added that computor control in this field had come into wide use and is effective technology for operation and save energy.
    2) As the attractive technology in preparation of cooking liquor, the pressurized filter and direct causticizing process are reviewed.
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  • Pulp and Paper Mills in America and Europe (VII)
    (13) Crestbrook Forest Industries Ltd. Skookumchuck Pulp Division (14) MacMillan Bloedel Ltd. Port Alberni Pulp & Paper Division
    Miuoru Kometani
    1984 Volume 38 Issue 5 Pages 514-521
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.514
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • [title in Japanese]
    [in Japanese]
    1984 Volume 38 Issue 5 Pages 522
    Published: May 01, 1984
    Released on J-STAGE: February 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.38.522
    JOURNAL FREE ACCESS
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  • Environmental Protection in the Pulp and Paper Industry for these ten years from 1971 to 1980
    JAPAN PAPER ASSOCIATION
    1984 Volume 38 Issue 5 Pages 523-534
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.523
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Pulp and Paper Mills in Japan (65)
    Asahikawa Mill, Sanyo-Kokusaku Pulp Co., Ltd.
    Sanyo-Kokusaku Pulp Co. Ltd.
    1984 Volume 38 Issue 5 Pages 535-544_1
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.535
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    Asahikawa mill is located in Hokkaido inland.
    Our mill has nine paper machines of which type are one cylinder former, one twin former and seven fourdrinier machines, producing daily 1, 000 metric tons of pulp and paper here.
    As proud of things, we supply 70 per cent base paper for copper-clad laminates for printed circuits as well as 40 per cent fireretardant type of hanging raw stocks for wall covering in Japan.
    We have 900 employees, 1, 175, 000 square meters mill site area and utilize 3, 500 cubic meters of wood daily.
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  • Stress-Strain Analysis of Paper by Finite Element Method
    Minoru Kimura, Hiroshi Shimizu
    1984 Volume 38 Issue 5 Pages 545-552
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.545
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    The mechanical behavior of relatively low grammage spots in paper sheets during deformation has become more critical because of the recent production trials of lightweight paper and the tendency towards more efficient use of wood resources. The computer simulation technique using the finite element method is discussed from the view point of establishing the basic simulation method enabling us to analyse an approximate estimation of the load-elongation behavior of the individual spots in paper as well as that of the entire paper sheet.
    The simulation was based upon the incremental strain method carried out starting from approximately one tenth of the failure load, followed by 13-15 additional loading steps. The additional load increment of each step decreased by 0.04 of the initial load.
    The output of the simulation in the analysis fitted well with the input data when equation (6) was adopted in the estimation of the total strain up to the i-th incremental step necessary for choosing the elastic modulus of paper for the calculation of stress and strain of the i-th step.
    The trials were performed successfully for various kinds of paper, such as bleached softwood handmade sheet, filter paper, restraint free handmade sheet, and commercial unbleached kraft paper.
    It is concluded finally that the method is useful to analyse mechanical behavior of paper when taking mass variation into account.
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  • Rate-Determining Steps of Cooking Reactions in Birchwood Digestion with Acid Sulfite Liquors
    Tsutomu Suzuki, Kunio Tosaka, Jisuke Hayashi
    1984 Volume 38 Issue 5 Pages 553-564
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.553
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    Cooking data from earlier digestions of birchwood by liquors of SO2-MgSO4 bicomponents and Mg base sulfite were analysed by the same basic heterogeneous kinetics as spruce-wood digestion previuosly reported to estimate rate-determining steps of their reactions of delignification and dissolution of carbohydrates.
    Quite different progress modes and rates of the cooking reactions were observed between the two liquor systems. These can be reasonably accounted for by different porous structure development in the wood cell wall relating to different digestive powers between the both liquors.
    When the results of birchwood digestion were compared with those of the previous sprucewood digestion, some interesting informations on their characteristics of digestive behavior were derived.
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  • Different Characteristics of the Effect of Tororo-aoi Mucin and polyethylene Oxide on Paper Making by Japanese Traditional Hand Process
    Hisao Ishikawa, Katsumi Okubo, Tae Oki
    1984 Volume 38 Issue 5 Pages 565-572
    Published: May 01, 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.565
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    In connection with the paper making properties of tororo-aoi mucin (TM) and polyethylene oxide (PEO) solutions, the permeabilities of the polymer solutions through the rayon pulp bed and the sedimentation velocities of the pulp in the solutions were measured.
    The permeability of TM solution was significantly smaller than that of PEO solution under the same conditions, and increased rapidly by aging or by the addition of NaCl. The fluent flow of TM solution through the pulp bed was proved to be un-explainable by Darcy's equation.
    Close correlation was also confirmed among the viscosity and permeability of TM solution or the sedimentation velocity of rayon pulp in the solution and the initial conformational transition of an ordered, weak structure of TM molecule. It was further clarified that the paper making properties described above are remarkably influenced by the dissociation of carboxyl group present in TM molecule and by the surface state of pulp fiber.
    From the results, the characteristic paper making property of TM is appreciably explained to be occured by a pore radius decrease in the rayon pulp bed, which is due to the thicker immobile layer caused by TM adsorption on the fiber surface, and by the dissociation of carboxyl group present in the mucin molecule. It was also found that a decrease in the effect of TM on paper making is partially inhibited by the addition of PEO in the aqueous solution.
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  • Erratum
    1984 Volume 38 Issue 5 Pages 578
    Published: 1984
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.38.5_578
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