繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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63 巻, 9 号
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時評
特集　シルクII
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  • 羊毛繊維の酸化染料染色における染色条件の影響
    上甲 恭平, 桑原 里実, 吉勝 友美, 坂田 佳子
    2007 年 63 巻 9 号 p. 205-211
    発行日: 2007年
    公開日: 2007/10/10
    DOIhttps://doi.org/10.2115/fiber.63.205
    ジャーナル フリー
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    Dyeing behavior for wool fibers from the couple system of p-phenilendiamine/p-amino-o-cresol and p-aminophenol/p-amino-o-cresol in use in current hair dye formulation was investigated. This paper describes the variation of dye uptake with factors such as pH in the bath solution, concentration of hydrogen peroxide, dyeing temperature and liquor ratio. Generally, the apparent dye uptakes increased with increasing of dyeing time, hydrogen peroxide concentration, dye temperature, and liquor ratio. However, indo dye decomposition by excess hydrogen peroxide is a competitive process in both couple systems. Particularly, the following fact was definitely observed above pH10.0: the higher dyeing temperature and the higher concentration of hydrogen peroxide led to the increase of the rate of dye formation reaction and the extent of dye decomposition. On the other hand, below pH10.0, the dye decomposition was also decreased due to the suppressing hydrolysis of hydrogen peroxide to perhydroxyl anion. Ultimately, it could be verified that the dyeing behavior of oxidation dye into wool fibers was subjected to a certain balance between dye formation and dye loss by hydrogen peroxide.
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  • Wear Resistance of Multi-Layer Interlocked Fabric Reinforced COPNA Resin Composite
    Hiroshi Suwa, Nobuyuki Ishikawa, Michiya Ota, Akira Kojima
    2007 年 63 巻 9 号 p. 212-217
    発行日: 2007年
    公開日: 2007/10/10
    DOIhttps://doi.org/10.2115/fiber.63.212
    ジャーナル フリー
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    Two kinds of multi-layer interlocked fabric with different fabric structures were made of pitch-based carbon fiber, and the fabric was combined with condensed polynuclear aromatic (COPNA) resin to prepare multi-layer interlocked fabric reinforced COPNA resin composites. In addition, a third type of material was prepared by adding graphite to the composite material. The wear resistance of these composite materials was evaluated under both high and low loading conditions by means of the cylinder/flat plate friction tester. The following results were obtained. In case of the composite material including graphite, at low loads the friction coefficient was low, and the wear resistance was high. However, at high loads the strength of the material was reduced due to the presence of graphite, and the sample failed. In case of composite materials made without graphite, the influence of the loading condition was small, and stable, high wear resistance was observed under conditions at both high and low loads. A higher wear resistance was observed in the case where the fibers were homogeneously distributed on the sliding surface of the composite material than in case where they were heterogeneously distributed.
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  • 杢目縫い絞りの発現に関する研究
    内田 貴, 岡村 政明
    2007 年 63 巻 9 号 p. 218-222
    発行日: 2007年
    公開日: 2007/10/10
    DOIhttps://doi.org/10.2115/fiber.63.218
    ジャーナル フリー
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    Shibori is the most primitive tie-dyeing technique that has been performed more or less in various regions of the world. There are many research works on historical background, pattern, and dyeing method of various types of Shibori. However, the generating mechanism of Shibori pattern has not been logically considered yet. The purpose of this study is to clarify the generation mechanism of a pattern of Mokumenui-shibori and to build up simulating system of Mokumenui-shibori. First, we considered the effect of stitching pattern on nine generated patterns of dyed Shibori and then compared two groups of patterns in which the samples of one group are stitched by professionals and those of another group stitched by amateurs. Then we predicted that stripe of Mokumenui-shibori is driven only three patterns of stitching condition. To verify our supposition, we made original computer program and simulated five types of simple Shibori pattern which we think ahead. In this program, we gained every correct pattern. To gain a real image of Shibori pattern, we measured two cases of the width of Shibori pattern stripe. One is the width of stripe which is dyed in dark (black), and other one is dyed in light (gray). We understood that, the distribution curve of the black width is showed liner equations which has same slope and the distribution curve of the gray width is showed one liner equation. We set those equations in our program and simulated all samples. As a result, we gained all most same images in CG and confirmed their patterns. About 95% of direction of each stripe was correct.
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