JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 19, Issue 1
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 19 Issue 1 Pages 1-2
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    D. A. I. Goring
    1965 Volume 19 Issue 1 Pages 3-10
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.3
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 19 Issue 1 Pages 11-14
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.11
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 19 Issue 1 Pages 14-17
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.14
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Influence of Grafted Pulp on the Properties of Paper
    Part III Beating Rate of Grafted Pulp
    Sang Bong Lee, Mitsuo Fujii
    1965 Volume 19 Issue 1 Pages 18-26
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.18
    JOURNAL FREE ACCESS
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    Original, acrylamide (AA) grafted, and methyl methacrylate (MMA) grafted pulps were beaten for 3, 6, and 9 hours respectively in water, ethanol, and acetone.
    Handsheets were made from them in the presence of water after removing the medium.
    The relationship between paper properties and beating state were investigated mainly from the standpoint of the swellability of grafted pulp in the mediums.
    1) Swellability of original and AA grafted pulps in the mediums has linear relationship to the cohesion energy density of the mediums, but in the case of MMA grafted pulp shows no linear relation.
    2) Equilibrium moisture content of the paper made from grafted pulp increases somewhat with the increase of beating time.
    3) Tensile strength, air resistance, smoothness, and degree of sizing of the paper made from the water beaten original and AA grafted pulps increase remarkably with increasing time of beating, while those of others increase slightly.
    4) Graph of beating time vs. tear strength of the paper made from original and MMA grafted pulp shows the maximum value at 3 hours beating time irrespective of kinds of the medium, except the case of AA grafted pulp.
    Mediums which have no swelling ability toward fibers do not fibrillate the grafted pulp upon mechanical treatment, while mediums which show a high or a proportionate swelling ability fibrillate the pulp in proportion to their swelling ability.
    It is found that these swellability are related with the affinity between grafted polymer and organic liquid.
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  • Studies on Pulp Bleaching (III)
    Delignification Through Peracid Treatment
    Michiyoshi Kono, Kokki Sakai, Tamio Kondo
    1965 Volume 19 Issue 1 Pages 27-32
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.27
    JOURNAL FREE ACCESS
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    In an effort to develop a method for the bleaching of chemical pulps, the chlorine-ethanolamine, chlorite and peracetic acid holocellulose-preparation methods were compared with respect to yield, degradation and degree of oxidation of the wood carbohydrates. It was found that the peracetic acid method gave superior holocellulose-preparations with higher D. P., large recovery of major polysaccharides and medium size of carboxyl contents.
    A preliminary study was made on bleaching the kraft pulp by using peracetic acid solution. This method results in a high yield of pulp with considerable good brightness. Further study is needed for better evaluation of the process and pulp made.
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  • Studies on Coated Papers
    4. Investigation of Coated Materials by the Use of Infrared Spectrophotometry
    Rikizo Imamura, Akiyoshi Yamaoka, Koji Aoki
    1965 Volume 19 Issue 1 Pages 33-42
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.33
    JOURNAL FREE ACCESS
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    Infrared spectrophotometry was applied to analyze the coated materials (binder and clay) of claycoated papers, using the reflection method and the transmittance method.
    The reflection method was carried out mainly by using the technique of ATR (Attenuated Total Reflection) with the instrument of CIC. The results showed that absorption of clay was too strong to distinguish that of binders. Therefore it was possible to identify coated clay, but the scope of application was found to be limited to a single kind of clay. That is, characteristic absorption bands were overlapped in more than a single kind of clay.
    The transmittance method was applied, using the peeled off coated layer as sample. As well as in the case of ATR, this method made it possible to identify the kind of clay, but it was impossible to do so about binders. If binders are isolated from coated layers into each composition by the extraction method, however, the transmittance method made it possible to identify some kinds of binder.
    In addition, some analytical data obtained about commercial coated papers are shown.
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 19 Issue 1 Pages 43-48
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.43
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 19 Issue 1 Pages 49-62
    Published: January 05, 1965
    Released on J-STAGE: November 12, 2009
    DOIhttps://doi.org/10.2524/jtappij.19.49
    JOURNAL FREE ACCESS
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