JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 18, Issue 1
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1964 Volume 18 Issue 1 Pages 3-6
    Published: January 05, 1964
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.3
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1964 Volume 18 Issue 1 Pages 6-9
    Published: January 05, 1964
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.6
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1964 Volume 18 Issue 1 Pages 10-15
    Published: January 05, 1964
    Released on J-STAGE: May 07, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.10
    JOURNAL FREE ACCESS
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  • On the Manufacture of Vinylon Paper by the Beater Addition of Polyvinyl-alchol Powder on a Pilot Paper Machine
    Rokuro Maematsu, Kuraitsu Ihara, Shizuo Tani, Kaname Tsunemitsu, Michi ...
    1964 Volume 18 Issue 1 Pages 17-22
    Published: January 05, 1964
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.17
    JOURNAL FREE ACCESS
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    Nippon Synthetic Chemical Industry Co., Ltd. has developed a new form of binder, identified as a Gohsenol p-200, specifically designed for vinylon fibers.
    The effects of PVA powder as a bonding agent of vinylon paper have been mentioned in practice. The manufacture of vinylon paper on a pilot fourdrinier paper machine by using PVA powder as a bonding agent by the beater addition were studied.
    Physico-chemical properties of vinylon paper by using PVA powder is better than that of PVA fiber.
    PVA powder is convenient to handle and paper-making readily in the mill. For the most efficient results, care should be taken to select the preferred PVA powder for the specific need.
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  • Studies on Coated Papers
    2. Orientation of Clays Coated on Papers by X-ray Techniques (I)
    Rikizo Imamura, Akiyoshi Yamaoka
    1964 Volume 18 Issue 1 Pages 23-26
    Published: January 05, 1964
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.23
    JOURNAL FREE ACCESS
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    In spite of the fact that the characteristics (gloss, smoothness, printability and etc.) of coated papers are affected by the orientation of clays coated on papers, the literature which deals with such a problem is scanty.
    In this paper, the investigation has been carried out by taking the X-ray diffraction diagrams of the clay layers which are overlapped and are put in parallel with the direction of X-ray. Specimens are clay-contained films, handcoated papers (non-supercalendered and supercalendered) and commercial coated papers. It is certain that the clays coated on papers orientate in the state of “uniplanar orientation”.
    Furthermore, the relationships between the shape and orientation of clays have been examined by considering the electron micrographs of them.
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  • The High Yield Chemical Pulping Process by the Use of Polysulfides Part 2.
    Two-Stage Cooking Process by the Use of Polysulfides and Alkaline Cooking Liquor.
    Goro Taga, Saisei Miyao, Tadashi Nishi
    1964 Volume 18 Issue 1 Pages 27-31
    Published: January 05, 1964
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.18.27
    JOURNAL FREE ACCESS
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    To obtain as high an yield as possible in the manufacture of chemical pulp by the use of polysulfides (Na2Sx) the presence of caustic soda (hydroxyl-ions) seems to be undesirable because the carbohydrates in woods will be hydrolyzed partly during they are stabilized by the action of Na2Sx.
    In order to improve the effectiveness of Na2Sx, therefore, the digestion should be carried out into two stages. In the first stage, Japanese red pine (Pinus densiflora) wood chips are treated with Na2Sx solution, and in the second stage, the pretreated chips are cooked by the use of alkaline aqueous solutions such as caustic soda or kraft white liquor. We call this process P.S.A.
    The following results were obtained from the cooking experiments.
    (1) Upon the type of Na2Sx used in the first stage cook, Na2S4 was more profitable than others in the increase of pulp yield.
    (2) The optimum pretreatment conditions were found to be 5.0% Na2S4 (as Na2O) based on wood chip, 130°C cooking temperature and 60 min. treatment time.
    (3) The second stage cook with alkaline liquor was carried out under the cooking condition of conventional kraft process. And no difference could be observed essentially between the two different alkaline cooking liquors (caustic soda and kraft white liquor) employed.
    Compared with the kraft process an increase in yield of pulp 56% on wood resulted from this process. (P.S.A.) This is also approximately twice as much as if the addition of polysulfides was made directly to the cooking liquor.
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  • Essai de la Fabrication des Pâtes de Bois Originaire du Cambodge Par le Procede Kraft
    Lyky Leang
    1964 Volume 18 Issue 1 Pages 33-44
    Published: January 05, 1964
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.18.33
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1964 Volume 18 Issue 1 Pages 45-50
    Published: January 05, 1964
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.18.45
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1964 Volume 18 Issue 1 Pages 64-68
    Published: January 05, 1964
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.18.64
    JOURNAL FREE ACCESS
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