JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 24, Issue 8
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 8 Pages 41-56
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_41
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 8 Pages 57-60
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_57
    JOURNAL FREE ACCESS
    Download PDF (604K)
  • [title in Japanese]
    [in Japanese]
    1970 Volume 24 Issue 8 Pages 397-408
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_397
    JOURNAL FREE ACCESS
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  • Studies on the Papermaking by Use of Surface Sizing Techniques (I)
    On Sizing at the Size Press
    Kojiro Nakata
    1970 Volume 24 Issue 8 Pages 409-423
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_409
    JOURNAL FREE ACCESS
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    In this paper were discussed the properties of sized paper made by surface sizing at the size press of a paper machine after removal of rosin and alum from the wet end.
    Oxidized starch and certain synthetic polymers were used for the surface sizing to impart water and ink resistance to paper. A waterleaf sheet was surface-sized at the size press, and the properties of the surface-sized paper were evaluated at our laboratory and pilot plant scale experiments.
    By the surface sizing techniques, the surface sizing solution penetrated deeply into the waterleaf sheet and showed its performance satisfactorily. In other words, the surface-sized paper showed a better writing quality, greater bursting strength and higher pick resistance than the internally sized paper. It was also found that the surface sizing techniques made it possible to use calcium carbonate as a filler of an excellent optical property.
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  • Studies on the Utilization of Alkali Lignin (Part 2)
    On the Preparation of Vanillin by Alkali Nitrobenzene Oxidation
    Shoji Kagawa
    1970 Volume 24 Issue 8 Pages 424-428
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_424
    JOURNAL FREE ACCESS
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    Conditions necessary for oxidation of lignin by nitrobenzene and alkali have been studied. Variables considered were : time of reaction, temperature, weight of nitrobenzene, concentration of alkali, volume of H2O, KOH and NaOH as alkali. Vanillin was identified as an important product of the reaction when carried out at high temperature.
    Studies were made on the use of crude alkali lignin from black liquor of soda pulp waste liquor as raw material for the production of vanillin. The results indicated that crude alkali lignin was as amenable to alkaline nitrobenzene oxidation as wood flour, HCl lignin and pure alkali lignin. Optimum conditions yield of vanillin was about 6% of lignin (in vanillin 2, 4-dinitrophenylhydrazone, 11%).
    The oxidizing agent nitrobenzene depending upon conditions was reduced to azoxybenzene, azobenzene, aniline, and recoverd as such.
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  • [title in Japanese]
    C. Cederholm
    1970 Volume 24 Issue 8 Pages 429-434
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_429
    JOURNAL FREE ACCESS
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  • OZ-DEHYDRATOR
    [in Japanese]
    1970 Volume 24 Issue 8 Pages 435-436
    Published: August 01, 1970
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.24.8_435
    JOURNAL FREE ACCESS
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