繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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63 巻, 4 号
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  • Photostabilization of Leuco Dyes : Counter-ion Effect on the Light Fastness of Color Formers
    Hironori Oda
    2007 年 63 巻 4 号 p. 81-86
    発行日: 2007年
    公開日: 2007/06/01
    DOIhttps://doi.org/10.2115/fiber.63.81
    ジャーナル フリー
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    Color formers are given considerable attention as functional dyes for heat- and/or pressure-sensitive recording media and printed textiles. Numerous potential metal complexes were synthesized to prolong the life of colored species. The protecting effect of these compounds against the photofading was examined on cellulose. It was found that the zinc or nickel salts of hydroxyarylcarboxylates bearing an amphoteric counter-ion effect can be applied as effective stabilizers against the fading of color formers.
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  • Modeling of Cross-sectional Shape for Women's Jacket Design
    Zhaohui Wang, Roger Ng, Edward Newton, Weiyuan Zhang
    2007 年 63 巻 4 号 p. 87-86
    発行日: 2007年
    公開日: 2007/06/01
    DOIhttps://doi.org/10.2115/fiber.63.87
    ジャーナル フリー
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    The shapes of the cross-section can be modeled by the ease distribution of the garment at different altitudes. The girth measurement of a given style as a major factor was used to model the cross-sectional shape for women's jacket in our previous studies, which achieved a reasonable degree of accuracy. However, the simulation can still be enhanced by including additional fabric properties. In order to improve modeling of the cross-sectional shapes for women's jacket with different fabrics, outline and fold of the cross-section were investigated. The jacket girth measurement and fabric bending rigidity were varied to study their effect on the cross-sectional shape. The outline of the cross-section was fitted by the second-order polynomial model with the girth measurement and bending rigidity. The folds of the cross-section were expressed by a function of number and amplitude. The validity of the model was evaluated by experiments with other fabrics. The results showed that the folds of the cross-sectional shapes were well captured by the theoretical model for different fabrics. The predicted outline of the cross-section, which included girth measurement as well as width and thickness, was in reasonable agreement with experimental observation. The model provided valuable information in selecting the fabric for desired appearance of women's jacket.
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  • 紅花染めにおける有機酸の作用
    大津 玉子, 飛田 満彦
    2007 年 63 巻 4 号 p. 97-101
    発行日: 2007年
    公開日: 2007/06/01
    DOIhttps://doi.org/10.2115/fiber.63.97
    ジャーナル フリー
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    The dyeing of silk cloth with carthamin extracted from safflower (Benibana) gave different shade with three organic acids, even though all dye baths were adjusted to pH=6.9. The cause of this color difference was studied by analyzing Kubelka-Munk function (KM-function) spectra of dyed silk cloth. The KM-function spectra were found to be composed by two spectral components, F0 and F0x. Theirmaximal absorptions were at 520 and 510 nm, respectively. The shade of dyed silk cloth depended on the both of relative strengths of the spectral components and the dyeing concentrations. The relative strength of the spectral component (F0) was arranged by the used organic acids as citric acid > acetic acid > Ubai, while the dyeing concentrations were arranged as acetic acid > Ubai and citric acid. The difference between the spectral components, F0 and F0x, was suggested to be caused by the degree dissociation of hydroxyl groups in carthamin. The dependence of the color difference of dyed silk cloth on the used organic acid, therefore, was considered to be attributed to the difference in acidity on the silk cloth.
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技術報文
  • Characteristics of Artificial Leather for Footwear
    - Mechanical Properties and Penetrating Behavior of Sewing Needle -
    Won Young Jeong, Jung Woo Park, Masayoshi Kamijo, Tsugutake Sadoya ...
    2007 年 63 巻 4 号 p. 102-107
    発行日: 2007年
    公開日: 2007/06/01
    DOIhttps://doi.org/10.2115/fiber.63.102
    ジャーナル フリー
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    It is necessary to develop the substitute material for natural leather because of its various defects. In this research, artificial leather was prepared by wet coagulation method with polyurethane resin in a laboratory instrument, and needle punching nonwoven fabric was used for substrate. We investigated the changes of various mechanical properties with small deformation and penetrating behavior of sewing needle into the fabric. In comparing mechanical properties of artificial leather with those of base nonwoven fabrics, B(bending rigidity) and 2HB(bending hysteresis) remarkably increased, and the intrinsic properties of base fabrics mainly affected the properties of the finished fabrics. Penetrating characteristics such as penetrating force, frictional force, withdrawal force, and penetrating energy increased with finishing and plying numbers. Dipping and coating processes with polyurethane play a significant role in obstructing needle penetrating into artificial leather.
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