Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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Volume 68, Issue 12
Journal of the Society of Fiber Science and Technology
Displaying 1-10 of 10 articles from this issue
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Reviews and News
Foreword
Special Issue on The Global Trends of Fibers and Textiles
Active Young Researchers in Fiber and Textile Fields
Series of Reviews for Cultures Associated with “Water” 15
Original Articles
Transactions
  • Improving the Light Fastness of a Kaki Polyphenol
    Hironori Oda
    2012 Volume 68 Issue 12 Pages 309-313
    Published: 2012
    Released on J-STAGE: February 05, 2013
    DOIhttps://doi.org/10.2115/fiber.68.309
    JOURNAL FREE ACCESS
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    The photofading behavior of a Kaki polyphenol on cellulose was investigated. The contribution of auto-oxidation, singlet oxygen and superoxide ion to that fading was suggested. Various nickel arylsulfonates were prepared, and the protecting effect of these nickel salts was examined towards this color. The photofading rate was remarkably suppressed in the presence of nickel salts, while the addition of UV absorbers and conventional stabilizers afforded little retardation of the rate of fading. The effect of the representative compounds against the fading of this color has also been examined on cotton fabrics. The results provided a valuable method for improving the light fastness of dyed fabrics. It was proposed that nickel complexes of 1-naphtol-8-sulfonic acid and its derivatives can be applied as effective stabilizers against the fading of a Kaki polyphenol.
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  • Investigation of a Relationship between Fabric Structure and the Bullet-protection Efficiency Using Lab-scale Dropping Projectile
    Wonyoung Jeong, Yi Na Yoon, Dae Young Lim, Euisang Yoo, Juhea Kim
    2012 Volume 68 Issue 12 Pages 314-318
    Published: 2012
    Released on J-STAGE: February 05, 2013
    DOIhttps://doi.org/10.2115/fiber.68.314
    JOURNAL FREE ACCESS
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    The bullet-protection efficiency of the protection panel composed of various fabrics was examined in this study. Two different types of aramid woven fabrics and two different types of fiber-reinforced composite (FRC) with/without polymeric film were examined. The physical properties such as tensile and tear strength were evaluated to inspect a relationship between the properties of materials and bullet-protection efficiency. Bullet-protection performance of stacked materials was evaluated using lab scale drop tester. The protection efficiency was determined by depth and diameter of trauma embedded on a backing clay. Results showed that the fabrication method and material had significant effect on bullet-protection efficiency. The FRCs demonstrated the better bullet resisting performance compared to the woven type materials considering the weight and thickness of stacked samples. Especially FRC with the polymeric film resulted in reduction of trauma significantly. However, the type of polymeric film should be carefully selected to attain efficient bullet resistance property because the protection efficiency was differentiated by the type of film.
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Notes
  • Dynamic Viscoelastic Properties of Continuous Drawn and Annealed Poly (phenylene sulfide) Filaments
    Wataru Okumura, Hiroyuki Hasebe, Mitsugu Kimizu, Jun Kamitani
    2012 Volume 68 Issue 12 Pages 319-322
    Published: 2012
    Released on J-STAGE: February 05, 2013
    DOIhttps://doi.org/10.2115/fiber.68.319
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    Dynamic viscoelastic properties of poly(phenylene sulfide) (PPS) multi-filaments which were prepared by continuous drawing and annealing were analyzed. And apparent activation energies (ΔE ) were calculated from the tan δ. With orientation induced crystallization, the peak of tan δ decreased, and the peak temperature of tan δ increased remarkably. Relaxation mechanism of α dispersion was discussed from the results. We considered that the molecular relaxation was prevented as molecular chains entangled in amorphous samples, on the other hand, it prevented as orientation induced crystal in crystallized samples.
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  • Carbonization Behavior of Hydrothermally Treated Woody Biomass
    Noboru Ishibashi, Hiroyuki Wakizaka, Kazuyoshi Yamamoto, Yutaka Kawaha ...
    2012 Volume 68 Issue 12 Pages 323-326
    Published: 2012
    Released on J-STAGE: February 05, 2013
    DOIhttps://doi.org/10.2115/fiber.68.323
    JOURNAL FREE ACCESS
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    Influence of the hydrothermal pre-treatments on the carbonization behaviors for bark and sap wood portions of sawtooth oak wood was investigated. The shrinkage in the course of carbonization for the bark portions was promoted markedly by applying the hydrothermal pre-treatments. To the contrary as for the sap wood portions the shrinkage was suppressed. The wide-angle X-ray diffraction measurements revealed that the hydrothermal treatments also affected the formation of the carbon layer stacking. The hydrothermal pre-treatments seem to have some potential to control the shrinkage and the formation of carbon crystallites in the production of charcoal from woody biomass.
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