Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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Volume 69, Issue 2
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
Review
Active Young Researchers in Fiber and Textile Fields
Series of Reviews for High Performance Papers, Specialty Papers 2
Original Articles
Transactions
  • Preparation of Textile Nonwoven Foams Using Elastomeric Binder Fibers for Automotive Cushioning Materials
    Ki-Young Kim, Sung Jun Doh, Jung Nam Im, Won Young Jeong, Hyo Jin An, ...
    Article type: Original Articles
    Subject area: Transactions
    2013Volume 69Issue 2 Pages 27-33
    Published: February 10, 2013
    Released on J-STAGE: April 09, 2013
    DOIhttps://doi.org/10.2115/fiber.69.27
    JOURNAL FREE ACCESS
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    The physical and mechanical properties of textile nonwovens have been exploited for the replacement of polyurethane(PU)foams in car interiors, in particular, cushioning materials for car seats. Polyethylene terephthalate(PET)hollow fibers and elastomeric bicomponent binder fibers were used to manufacture automotive nonwovens by carding processes, and post bonding processes such as needle punching, thermal bonding or through-air bonding. The physical and mechanical properties of nonwovens were thoroughly investigated with respect to the effects of bonding processes. The tensile strength and elongation for the nonwovens were significantly improved by the combined needle punching and through-air bonding processes. In comparison with the PU foam, the nonwovens showed a greater hardness, and their higher support factors ranging from 7.7 to 11.0 indicated the improved seating performances with better air permeability.
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  • Synthesis and Liquid Crystal Formation of Ionic Polymers Having Hydrophobic Side-Chains
    Jinzhi Wu, Seiji Ujiie
    Article type: Original Articles
    Subject area: Transactions
    2013Volume 69Issue 2 Pages 34-38
    Published: February 10, 2013
    Released on J-STAGE: April 09, 2013
    DOIhttps://doi.org/10.2115/fiber.69.34
    JOURNAL FREE ACCESS
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    Thermotropic ionic liquid crystal polymers were synthesized by ion complexation of polyacrylic acid and low-molecular-weight amines with hydrophobic chains. The ionic liquid crystal polymers obtained in this research clearly exhibited a thermotropic liquid-crystalline phase on the heating and cooling processes. The ionic liquid crystal polymers(PA/N-6-n)consisting of polyacrylate ions and cationic mesogens with an azobenzene core induced a smectic A phase. The thermal stability of the smectic A orientational structure in PA/N-6-n depended on a terminal group of the cationic mesogen. Moreover, the ionic liquid crystal polymers composed of the polyacrylate ions and ammoniums with long alkyl chains(without mesogenic cores)also revealed the smectic A phase. These results for the liquid crystal formation of the ionic liquid crystal polymers indicate that the ionic interaction acts effectively in producing the liquid-crystalline state through an ionic aggregation.
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  • Thermoplastic Polyesters of 2-Pyrone-4,6-Dicarboxylic Acid (PDC) Obtained from a Metabolic Intermediate of Lignin
    Kazuhiro Shikinaka, Yoshiki Hashimoto, Shinya Kajita, Eiji Masai, Yosh ...
    Article type: Original Articles
    Subject area: Transactions
    2013Volume 69Issue 2 Pages 39-47
    Published: February 10, 2013
    Released on J-STAGE: April 09, 2013
    DOIhttps://doi.org/10.2115/fiber.69.39
    JOURNAL FREE ACCESS
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    2-Pyrone-4,6-dicarboxylic acid (PDC), a chemically stable metabolic intermediate of lignin, was converted into the corresponding acid chloride and thermoplastic polyesters were synthesized by polycondensation with several aromatic diols. The polyesters exhibited high decomposition temperature due to the presence of aromatic group adjacent to the PDC group. The films prepared by hot-pressing gave relatively high fracture stress that is almost comparable to poly(ethylene terephthalate) (PET) and showed oriented crystallization upon stretching.
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