JOURNAL of the JAPAN RESEARCH ASSOCIATION for TEXTILE END-USES
Online ISSN : 1884-6599
Print ISSN : 0037-2072
ISSN-L : 0037-2072
Volume 23, Issue 3
Displaying 1-7 of 7 articles from this issue
  • [in Japanese]
    1982 Volume 23 Issue 3 Pages 88-92
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1982 Volume 23 Issue 3 Pages 93-96
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1982 Volume 23 Issue 3 Pages 97-100
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1982 Volume 23 Issue 3 Pages 101-104
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    1982 Volume 23 Issue 3 Pages 105-112
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
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  • —Effects of Cloths and Floorcoverings—
    Junko Watanabe
    1982 Volume 23 Issue 3 Pages 113-118
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
    A static electrification was studied on the various combination of cloths and floorcoverings in an airconditioned room in winter. The room temperature was kept at 24.0±1.5°C with a relative humidity of 28.2±2.5%. Female subjects were asked to perform a physical movement, i.e., repetition of standing up from and sitting down on a chair. An electrostatic charge of the human body was measured.
    Cloth materials tested in this experiment were made of wool, polyester and acrylic fibers. An electrical charge was produced by the repeated detachment of clothes from vinyl leather of a chair seat. The wool fibers gave a larger charge than polyester or acrylic fibers did, because its location along the orderseries of the frictional electrification was far from that of vinyl leather.
    Floorcovering materials tested were nylon-carpet, acrylic-carpet, cushion floor and antistatic finished nylon-carpet. The last one, which contained the carbon black to prevent a static charge, showed the smallest density of charge, i.e., its charge did not exceed 2 or 3 kv, while charges of other materials reached 14 kv under the same conditions.
    Some combinations of cloth and f loorcovering materials took a time longer than 10 minutes to lose their charges enough to the level lover than spark-discharging threshold. The individual difference in the amount of static charge was rather large. This might come from the individual difference in location on the order-series of the electrification and in the moisture content of their skin.
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  • Junko Akashi, Mutsuo Okuno, Yoshito Sakaguchi
    1982 Volume 23 Issue 3 Pages 119-125
    Published: March 25, 1982
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
    The penetration forces of sewing needles were measured in relation to the percentage of extracted oils and waxes in the cotton rib knitted fabrics, which were pretreated, dyed, aftertreated and lubricated for improving the sewability. The penetration forecs were analyzed by the analysis of variance with the three-way layout, i.e., factors of the pre-treatment, dyeing temperature and dye concentration.
    The results are summarized as follows.
    (1) The percentage of extract decreased and the penetration forces increased, as the finishing processes were carried on. Oil and wax contents, however, increased by lubricating and the penetration force decreased thoroughly.
    (2) The analysis of variance of the penetration forces showed that there was the most significant difference in pretreatment.
    (3) The penetration forces can be expressed approximately as an exponential function of the percentage of extract which was affected by the finishing procedure.
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