繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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66 巻, 11 号
選択された号の論文の11件中1～11を表示しています
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  • 繊維ハイブリッドI型組物複合材料の曲げ特性
    忍久保 正治, 大谷 章夫, 仲井 朝美, 濱田 泰以, 魚住 忠司
    2010 年 66 巻 11 号 p. 267-271
    発行日: 2010/11/10
    公開日: 2010/12/10
    DOIhttps://doi.org/10.2115/fiber.66.267
    ジャーナル フリー
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    Braided fabrics are suitable for structural members of Fiber Reinforced Plastics (FRP) as the reinforcement. The braided fabric can be fabricated into various cross-sectional shape such as tube, rectangular, I-shape, L-shape structures and so on. By using this braiding technique, near net-shape products with continuity of the reinforcing fibers can be achieved, so excellent mechanical properties were expected. In addition, unidirectional fiber bundles can be inserted into braided fabric and various types of fiber bundles and number of fiber bundles can be changed according to the required design.
    In this study, in order to investigate the fiber hybrid effect on the mechanical properties of FRP, several kinds of hybrid I-shaped braided fabric with glass and carbon fibers were fabricated and used for the reinforcement of I-beam composites. The bending properties were examined with 4-point bending test, and bending strength of the hybrid specimens was improved by optimally combining the glass and the carbon fiber compared with the specimen with sole carbon fiber with keeping bending modulus.
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  • 毛髪のパーマネントウェーブ形成における緩和処理の効果
    櫻井 慶子, 上甲 恭平
    2010 年 66 巻 11 号 p. 272-279
    発行日: 2010/11/10
    公開日: 2010/12/10
    DOIhttps://doi.org/10.2115/fiber.66.272
    ジャーナル フリー
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    The relaxation behavior on the permanent waving performance of human hair were investigated. According to a standard procedure simulating commercial practice, hair tresses were wrapped on a rod 12mm in diameter and were waved by immersing in 5% thioglycolic acid solution, rinsing with water and neutralization with sodium bromate solution. The relaxation processing was applied after water rinse and carried out remaining the rod under the various conditions for a certain period of time. The effects of the relaxation processing were observed for the hair samples treated for 3-15 minutes with the reduction solution. This wave imparted by added relaxation processing was stronger and shorter than in the absence of relaxation. This indicates that the mechanical relaxation may occur simultaneously and moderately with the protein chains of keratin structure with a much lower conversion of disulfide to sulfhydril group. Accordingly, if the permanent waving of hair is carried out by the produce involving the relaxation processing, the reduction state in the hair necessary for the protein chain rearrangement to equilibrium with the curled configuration can be attained with a smaller concentration of sulfhydril groups, so that the permanent waving produce involving the relaxation processing results in major benefits of fiber degradation as observed by appearance and feel.
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  • PVAとPEDOT⁄PSSの混合湿式紡糸による導電性高分子繊維の強度・導電率評価
    三浦 宏明, 諸星 勝己, 岡田 順, 林 榜佳, 木村 睦
    2010 年 66 巻 11 号 p. 280-283
    発行日: 2010/11/10
    公開日: 2010/12/10
    DOIhttps://doi.org/10.2115/fiber.66.280
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    An electroconductive polymer, poly-3,4-ethylenedioxithiophene⁄poly-styrenesulphonic acid (PEDOT⁄PSS) is noticed because it has high generality, electroconductivity, and transparency. We are considering practicability of a cloth sensing device made of electroconductive polymer fibers. However, as the tensile strength of pure PEDOT⁄PSS fiber is low, it is not suitable for fabricating devices. We examined a possibility of coexisting of high conductivity and high strength by blend fibers consisting of an electroconductive polymer and another polymer (polyvinyl alcohol: PVA). A tensile strength of the PEDOT⁄PSS and PVA blend fibers was about twice as that of the pure PEDOT⁄PSS fiber. The electroconductivity of the blend fibers also increased several times despite of decreasing amount of conductive polymer. The Raman spectrum revealed that the comformation of PEDOT was changed into a linear or expanded coil comformation by combining with PVA.
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  • Highly Sensitive Sizing Response Induced by 2-Bromination of Fatty Acids and their Pairing with Anchor Sites Formed on Paper Surfaces
    Takuya Kitaoka, Nobuo Tanaka, Kana Matsuyama, Hiroki Yamamoto
    2010 年 66 巻 11 号 p. 284-287
    発行日: 2010/11/10
    公開日: 2010/12/10
    DOIhttps://doi.org/10.2115/fiber.66.284
    ジャーナル フリー
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    The base handsheets were prepared from a pulp suspension containing either aluminum sulfate (alum) or polydiallyldimethylammonium chloride (PDADMAC), followed by being soaked in the chloroform solution of stearic and palmitic acids (SPA), which were brominated, or non-brominated, at the α-carbon positions adjacent to respective carbonyl groups. No sizing effect was observed in the absence of alum or PDADMAC, and thus these additives that form anchor sites for size components were indispensable for sizing appearance. Besides, extremely different sizing responses were found, strongly depending on the combinations of fatty acids and additives. Alum-treated handsheets showed good sizing effects by dipping them in an SPA⁄chloroform solution; however sizing with 2-brominated SPA (Br-SPA) had no contribution to sizing appearance. By contrast, PDADMAC-handsheets sized with Br-SPA exhibited high sizing degrees, although there was no sizing effect in the case of using non-brominated, original SPA. Highly sensitive sizing responses would provide a new insight to elucidate paper sizing mechanisms.
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