Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
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Volume 64, Issue 3
Displaying 1-6 of 6 articles from this issue
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  • Preparation of Microcapsules containing Water-Absorbent Polymer
    Masato TANAKA, Katsunori SATO, Isao KIMURA
    1991 Volume 64 Issue 3 Pages 140-147
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.140
    JOURNAL FREE ACCESS
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    Microcapsules containing sodium polyacrylate of water-absorbent polymer were prepared by the drying-in-liquid method. First, sodium acrylate monomer was polymerized to some extent and W/O emulsion was prepared. Polymerization was continued after preparation of (W/O) /W emulsion. In this capsulation process, operational conditions, such as the conversion of monomer, the concentration of polystyrene as the wall material in oil phase and the impeller speed at the second emulsification, were changed stepwise. It was investigated how the operational conditions affected several properties of microcapsules such as the size distribution, the mean size, the content of core material, the rate of absorption and the amount of absorbed water. Also, the microscopic observation of the surface and the cross section of microcapsules was performed.
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  • Dispersion Mechanism in a Sand Mill
    Tsugio TENDA, Yukinori KUBOZONO, Hironobu NISHIMURA, Toshiyuki TESHIBA ...
    1991 Volume 64 Issue 3 Pages 148-155
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.148
    JOURNAL FREE ACCESS
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    Experimental work was reported which related a dispersion mechanism in a sand mill based on the motion of a grinding medium. The study was conducted using a vertical sand mill with flat plate discs, vertical pin-discs and horizontal pin-discs. Glass beads were used as grinding media.
    Flow patterns and velocity distributions of the grinding media in the mill were observed by a video camera which was enabled by the coincidence of refraction indices of the grinding media and the mill-base. Calcium carbonate was also ground in the same machine to investigate the relationship between the velocity characteristics of grinding media and the dispersion performance.
    The results showed that the magnitude of velocity fluctuations of the grinding media was well correlated with the dispersion performance. On the other hand, both velocity gradients and average velociy of the grinding media did not always effect to the dispersion.
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  • Fabric hand and its Objective evalution
    Sueo KAWABATA
    1991 Volume 64 Issue 3 Pages 156-163
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.156
    JOURNAL FREE ACCESS
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  • Acid Rain Damages in Foreign Countries and its Effects to Japan
    Haruo MATSUI
    1991 Volume 64 Issue 3 Pages 164-171
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.164
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  • Printing of Hologram
    Yukio TANIGUCHI
    1991 Volume 64 Issue 3 Pages 172-177
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.172
    JOURNAL FREE ACCESS
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  • Thermal Analysis
    Shigeki SUGIURA, Rieko KANAZAWA
    1991 Volume 64 Issue 3 Pages 178-190
    Published: March 20, 1991
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.64.178
    JOURNAL FREE ACCESS
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