繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
70 巻, 8 号
繊維学会誌
選択された号の論文の16件中1~16を表示しています
繊維と工業
時評
特集〈次世代を担う若手研究者たち2〉
「がんばる若手研究者」
「最近の博士論文より」
解説
連載〈文化の伝承 ― 祭り ― 10〉
連載〈知的財産権-1〉
連載〈溶融紡糸の原点〉
繊維学会創立70周年記念連載〈技術が支えた日本の繊維産業-生産・販売・商品開発の歩み-12〉
レポート
報文
一般報文
  • 的場 兵和, 伊藤 章喜, 伊香賀 敏文, 大越 豊
    2014 年 70 巻 8 号 p. 167-173
    発行日: 2014/08/10
    公開日: 2014/08/11
    ジャーナル フリー
    The fiber with gradually changing diameter was fabricated by changing the draw ratio continuously, that is, by changing the take-up speed of melt spinning, laser drawing, and heater drawing processes. The diameter profiles of resultant fibers were monitored and compared each other. As the results, the laser drawing shows the best diameter responsiveness among the three. For the case, the diameter changing rate increased with the increase of fiber acceleration rate up to 6.0 m/s2. Moreover, it can make the fiber whose diameter gradually changed about 40% within 8 cm range for the minimum case. The diameter profile was determinded by not only the draw ratio profile but also the start/end draw ratios. The lower drawing stress change tends to improve the responsiveness, and the minimum response length for laser drawing was obtained for the draw ratio decreasing case.
  • 村山 和弘, 小野寺 泰子, 西村 真次, 柳沼 伸明, 追沼 龍三
    2014 年 70 巻 8 号 p. 174-179
    発行日: 2014/08/10
    公開日: 2014/08/11
    ジャーナル フリー
    The computer program based on our mathematical model of the 1×1 rib knitting process can predicted the loop length and the course length, the yarn tensions in the 1×1 rib knitting zone, the robbing back length on the course, the robbing back rate, the maximum yarn tension value and position. The effects of the frictional coefficient of yarn/ knitting elements on the course length, the yarn tensions in the 1×1 rib knitting zone, the robbing back length on the course, the robbing back rate, the maximum yarn tension value and position are analyzed theoretical using the cotton yarn and the worsted yarn. The results obtained are as follows. 1) The course length increases with the increase of the frictional coefficient yarn/knitting element both the cotton yarn and the worsted yarn. 2) The robbing back length and the robbing back rate decrease with the increase of the frictional coefficient yarn/knitting element both the cotton yarn and the worsted yarn. 3) The maximum tension value increases with the increase of the frictional coefficient yarn/ knitting element both the cotton yarn and the worsted yarn.
技術報文
  • Horiba Yosuke, Inui Shigeru, Maeda Yuki, Shimada Takaaki, Teraoka Hiro ...
    2014 年 70 巻 8 号 p. 180-186
    発行日: 2014/08/10
    公開日: 2014/08/11
    ジャーナル フリー
    A method to predict a diaper condition while worn is proposed in this study, based on the pattern paper of a disposable diaper, material properties and body shape. This paper in particular reports the analysis results on the posture of open legs when a tape-type baby diaper is worn by using the explicit finite element method. Upon analysis, geometric mapping of a diaper, dynamic computation regarding strain generated in a diaper resulting from mapping as a geometric boundary condition, and dynamic computation regarding strain of gather rubber as a geometric boundary condition are sequentially conducted to obtain the shape while worn. When the leg gather (hereinafter, “LG”) position as well as vacant space distribution was compared with the actual diaper in order to verify appropriateness of analysis results, the error rate was approximately 3.8% at maximum in regards to the LG position; therefore a certain level of appropriateness was confirmed. On the other hand, the error in analysis results was significant in the vacant space distribution, indicating the need to model the crease formed upon product packaging as observed in the actual diaper. Since it is possible to calculate the shape of a disposable diaper while worn based on the pattern paper and material properties with this method, it is considered to be useful upon investigating the shape of pattern paper in the design phase.
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