Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)
Online ISSN : 1880-1994
Print ISSN : 0371-0580
ISSN-L : 0371-0580
Volume 46, Issue 3
Displaying 1-6 of 6 articles from this issue
  • Masanobu Hoten, Taisuke Ito, Tetsuo Sekiguchi, Kojiro Arai
    1993 Volume 46 Issue 3 Pages T51-T60
    Published: March 25, 1993
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    Acrylonitrile (AN) /methylacrylate (MA) copolymer having AN/MA ratio of 90/10 by weight was wet-spun and drawn 12 times in hot water. The original sample was then subjected to the steam treatment at various temperatures under unconstrained length. This sample is called with symbol SH. SH was then drawn in dry state under various temperatures and stretch-ratios (named with the symbol ST). The practically important thermoelastic behavior of these acrylic fibers above the glass transition temperatures was studied from shrinkage, stress-strain curve and dye diffusion measurement. An inherent stretch ratio named rubbery elongation limit (REL) is defined to each of SH by the initial straight line part of the stress-strain curve obtained in hot water. ST obtained by drawing SH within REL, were found almost completely recoverable to the original length when subjected to hot water shrinkage treatment. For these fibers, the diffusion coefficient, D, of basic dye (C. I. Basic Red 18) showed no appreciable change by stretching. When SH was drawn above REL, the unrecoverable fraction of the length in the hot water shrinkage treatment of ST gradually increased and D clearly decreased with increasing stretch ratio. Based on the more detailed analysis of the quantitative thermoelastic data, structural models for the SH and ST were proposed which are applicable characteristically to acrylic fiber.
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  • Part 2 : Effect of Processing Variables on Blend Irregularity
    Fujio Konda, Masaaki Okamura, Shinya Kurosaki, Akira Watanabe, Tomonor ...
    1993 Volume 46 Issue 3 Pages T61-T69
    Published: March 25, 1993
    Released on J-STAGE: February 12, 2010
    JOURNAL FREE ACCESS
    The effect of processing system-stock blending or sliver blending, feeding direction and fiber length difference on the blending irregularity was discussed. The developed apparatus and methods described in Part 1 for evaluating blend irregularity was applied. Blended gill sliver composed of white and black fiber was examined during delivering from front roller of gill box.
    The obtained results are as follows :
    1) The blend irregularity for sliver blending decreases with increasing the stage of gilling and approaches to steady value at around five gillings. On the other hand, the blend irregularity for stock blending is smaller than the sliver blending. The blend irregularity for stock blend sliver remains almost constant as the stages of gilling.
    2) Both the blend and thickness irregularity for forward feeding are larger than for reverse feeding.
    3) Blend irregularity increases with increasing the difference in the blend fiber length.
    4) There is a tendency for short fibers to get together in a thicker part of sliver.
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  • Masando Fujimoto, Makoto Nakamura, Teruo Nakamoto, Masaru Nakajima
    1993 Volume 46 Issue 3 Pages T70-T77
    Published: March 25, 1993
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    The transportation of opened tufts in spinning processes is now generally carried out by the air flow between each station of blowing Processes, or between each station connecting blowing and carding processes.
    The air shooting system through a duct has been developed to a satisfactory level in order to connect blowing and carding processes, is used in many factories in Japan.
    In this report, static pressure and air velocity at each card distributor are investigated on various factors of aNon-Lap-Card Feeder.
    And it became clear that the most influential factor on both static pressure and air velocity is the duct resistance in distributing uniform fiber masses or tufts to each card.
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  • A. Nishimura
    1993 Volume 46 Issue 3 Pages P128-P134
    Published: March 25, 1993
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
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  • M. Fujii
    1993 Volume 46 Issue 3 Pages P135-P139
    Published: March 25, 1993
    Released on J-STAGE: June 17, 2010
    JOURNAL FREE ACCESS
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  • S. Yoshikawa
    1993 Volume 46 Issue 3 Pages P140-P144
    Published: March 25, 1993
    Released on J-STAGE: October 27, 2009
    JOURNAL FREE ACCESS
    Download PDF (7518K)
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