JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 16, Issue 12
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 16 Issue 12 Pages 942-943
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_942
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 16 Issue 12 Pages 944-960
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_944
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 16 Issue 12 Pages 961-973
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_961
    JOURNAL FREE ACCESS
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  • Photoelectric Properties of Electrofax Paper
    II. Effect of Binder Resin on Photoelectric Properties (1)
    Yuji Harazaki, Haruo Hasegawa, Toru Nishitani, Kiichi Kirigaya
    1962 Volume 16 Issue 12 Pages 974-977
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_974
    JOURNAL FREE ACCESS
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    Effect of binder resins for ZnO on dark and light decay of faxpapers were examined.
    The resin does not only serve the vital function of keeping moisture away from the crystallite surfaces, but also raises up charge of fax layer, and has an effect on photoconductivity.
    There are any interaction between the surface of ZnO and binder resin.
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  • Studies on the Manufacture of Tobacco Stem Pulp
    II. Pulping of Tobacco Stem with Alkalies
    Yoshitsugu Kimura, Fumiyuki Teratani
    1962 Volume 16 Issue 12 Pages 978-984
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_978
    JOURNAL FREE ACCESS
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    Some alkaline cooking processes were applied to obtain the pulp from Tobacco stem in laboratory scale, and the physical properties of those Tobacco pulps were investigated.
    The cold soda pulps were produced at the comparative low yield between 64% to 67% with the immersion for long time. The defibration and refining of immersed chips were carried out in the Lampen mill and the small beater, but the fine shieves remained considerably in abundance after the pulps were bleached.
    The washed and air-dried chips were cooked with the various amount of sodium hydroxide. The consumption of alkali was slightly low level as compared with the common case of alkaline pulping of wood. The soda pulp having brightness value of 70 could be easily obtained by the usual process; for example, the combination of the cooking with 16.4% active alkali and the single stage hypochlorite bleaching with 10% available chlorine. Excepting the conditions of cooking and bleaching, the wire mesh of screen for the pulp washing and the decay of Tobacco stem were distinctly the affecting factors on the yield and properties of pulp.
    The washed chips were cooked with 19.5% active alkali at the various temperature by the sulphate process. The cooking temperature had relatively little effect on the strength properties of pulp, although the yield of pulp tended to decrease with increasing temperature. The sulphate pulp having brightness value of 73 was obtained at the yield about 38% by the two-stage bleaching with sodium chlorite and calcium hypochlorite.
    It is concluded that the manufacture of the peculiar papermaking pulp from Tobacco stem can be possible by means of selecting the suitable condition. The papers from Tobacco stem pulps have generally such the character as high density and low opacity, and in the strength properties they are similar to the hardwood pulp of good quality.
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  • Study on the Japanese-Paper (16)
    On pH of the Hand-Made Paper
    Haruji Kato, Hiroshi Ishikawa
    1962 Volume 16 Issue 12 Pages 985-988
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_985
    JOURNAL FREE ACCESS
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    (1) According to a test in regular method, pH was measured for the exuded liquid which was dissolved out by boiled water from hand made-paper in Japan and a various foreign paper made by machine.
    (2) By the results of the above, I confirmed that the liquid of the latter shows acid reaction, and the former shows alkaline reaction.
    (3) It is clear that an excess of the alkaline contents of the liquid is the cause of alkalinity of a hand-made paper of Japan.
    If we use soda ash instead of sodium carbonate, we might expect miner pH of them.
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 16 Issue 12 Pages 989-993
    Published: December 20, 1962
    Released on J-STAGE: November 17, 2009
    DOIhttps://doi.org/10.2524/jtappij.16.12_989
    JOURNAL FREE ACCESS
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