繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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64 巻, 11 号
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  • 上下差動送りミシンによるいせ込み縫製に関する研究 －コンピュータ縫製による袖山曲線のいせ込みへの応用－
    青山 喜久子, 島﨑 恒藏
    2008 年 64 巻 11 号 p. 313-318
    発行日: 2008/11/10
    公開日: 2008/12/10
    DOIhttps://doi.org/10.2115/fiber.64.313
    ジャーナル フリー
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    In the previous paper [1], we discussed an experimental method for estimating seam shrinkage along the optional direction of fabric using a variable top feed and differential drop feed sewing machine. In this study, we considered to apply computerized sewing to easing in sleeve cap seam using the results in the previous paper. The results obtained were as follows: At first we obtained seam shrinkage ratio of sewn fabrics under predetermined differential ratio conditions experimentally at 4 kinds of sewing angles, i.e. 45, 90, 135 and 180(0) degrees, where we defined 0 deg. as weft, 90 deg. as warp direction, respectively. On the basis of the results mentioned above, we showed a method to obtain the differential ratio by means of interpolation that desired seam shrinkage ratio could be completed in optional sewing direction. As for sleeve pattern selected, we divided the seam line in sleeve cap to several parts and shared total amount of easing with every divided part. The differential ratios to obtain the desired amount of easing were calculated in every sewing stitch in the divided parts. The data were input to the controller and computerized easing sewing was performed using various specimen fabrics. It was shown that the designed easing sewing was done contentedly although the appearances of sleeve samples differed from each other by the fabrics used. We confirmed that the method shown here for computerized sewing was very useful to easing in sleeve cap seam for fabrics with various properties.
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  • 金属繊維編物の引張変形挙動に関する研究
    圓井 良, 仲井 朝美, 濱田 泰以
    2008 年 64 巻 11 号 p. 319-323
    発行日: 2008/11/10
    公開日: 2008/12/10
    DOIhttps://doi.org/10.2115/fiber.64.319
    ジャーナル フリー
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    Metal fiber has high strength, electro-conductivity and heat resistance. Metal knitted fabric has flexibility and elasticity as well as excellent properties of metal fiber. Therefore, metal knitted fabrics attracts attention as new industrial materials. The relationship between deformation behavior and mechanical properties of metal knitted fabric, which was made with a cylindrical knitting-machine, was discussed in this study. The deformation behavior of knitting structure under tensile loading was examined by in-situ observation. Furthermore, Evaluate the elastic modulus between experimental result and calculated result of Finite Element Method.
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  • シアノビフェニル基を末端に持つフラロデンドロンの合成と液晶性
    酒向 祐輝, 高口 豊, 市原 正寛, 太田 和親
    2008 年 64 巻 11 号 p. 324-328
    発行日: 2008/11/10
    公開日: 2008/12/10
    DOIhttps://doi.org/10.2115/fiber.64.324
    ジャーナル フリー
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    Liquid-crystalline fullerodendron having cyanobiphenyl terminals was synthesized via Diels-Alder reaction of corresponding anthryl dendron and C60. The liquid-crystalline properties of the fullerodendron was investigated by polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. Interestingly, the fullerodendron give rise to thermotropic smectic B phase, in which the hexagonal packing arrangement of C60 moiety is observed.
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  • Paper Friction -Effect of Real Contact Area-
    Noriaki Kawashima, Jun Sato, Tatsuo Yamauchi
    2008 年 64 巻 11 号 p. 329-335
    発行日: 2008/11/10
    公開日: 2008/12/10
    DOIhttps://doi.org/10.2115/fiber.64.329
    ジャーナル フリー
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    Relating to real contact area against plane smooth surface, effects of the measuring conditions on paper friction, surrounding atmosphere and applied pressure, were examined. An optical interference method using a scanning laser microscope was adopted to measure the real contact area against a plane smooth surface. The estimated contact area of paper is around 1% of nominal area for common papers. The increase in the contact area with increasing relative humidity is considered as a cause of the increase in the friction coefficient with an increase in relative humidity. The contact area of paper generally increased in a ratio of two-thirds power of the apparent pressure over a wide range of pressure. It suggested that contact of paper was generally elastic and this fact was one reason describing the decrease in the coefficient with increasing apparent pressure. However the decrease in the coefficient is little and the frictional behavior of paper can not be fully described by the contact area against a smooth surface.
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