The Journal of Silk Science and Technology of Japan
Online ISSN : 1881-1698
Print ISSN : 1880-8204
ISSN-L : 1880-8204
Volume 24
Showing 1-10 articles out of 10 articles from the selected issue
  • Yutaka Kawahara, Hideaki Fujii, Wataru Takarada, Takeshi Kikutani, Nob ...
    2016 Volume 24 Pages 5-10
    Published: 2016
    Released: March 24, 2016
    JOURNALS FREE ACCESS
    An aerogel with dendritic fibro-structure could be produced from a dilute aqueous solution of liquid silk, and the structure of the aerogel was analyzed using Raman spectroscopy. A weak molecular orientation was recognized in the portions of the aerogel with dendritic fibro-structure, and the gel contained β-sheet conformation. The β-sheet modification was promoted by the water annealing treatment at room temperature. The modification proceeded more markedly in the regions with molecular oriented texture.
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  • Eiji Okada, Ken-ichi Nakajima, Yuji Inami, Koji Hashimoto, Tetsuya Iiz ...
    2016 Volume 24 Pages 11-16
    Published: 2016
    Released: March 24, 2016
    JOURNALS FREE ACCESS
    The extra-fine filament is size of cocoon filament below 2.0 denier in silkworm. "Hakugin" is known as the extra-fine filament silkworm race. However, in recent years, because the size of “Hakugin” cocoon filament is becoming thicker, the development of silkworm races has been required in order to maintain its extra-fine filament. And improvement for oviposition properties has been demanded from the viewpoint of silkworm eggs production. On the basis of parent strains of the “Hakugin”, we were grown new strains with improved properties of cocoon filament and oviposition, “C516 × C517”. As compared with Hakugin, this breed didn't change any of the fineness, yarn quality and so on. In addition, this breed, it was better the oviposition properties than “Hakugin”. “C516 × C517” was conducted a trademark registration nicknamed as "Hakurei".
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  • Fujie Haishima, Teruko Tamura
    2016 Volume 24 Pages 17-24
    Published: 2016
    Released: March 24, 2016
    JOURNALS FREE ACCESS
    We developed a device to measure the dynamic drapability of fabric, evaluating the swinging motion of silk fabrics. The relationship between revolution speed and amount of fabric displacement was investigated, along with the relationship between waveform and frequency; and the swinging motion was numerically evaluated. The results showed that, as the fabric revolution speed increased, the drape dynamic coefficient increased, for all fabrics. The waveform and power spectrum shape also varied with the speed of revolution. The results also showed that the swinging motion could be numerically evaluated.
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  • Masaaki Okajima, Shigeto Shimizu, Haruo Kinoshita, Hideaki Morikawa
    2016 Volume 24 Pages 25-32
    Published: 2016
    Released: March 24, 2016
    JOURNALS FREE ACCESS
    We analyzed the influence of silk reeling conditions on reeling tension. Our aim was to achieve low-tension production of raw silk by using a multipurpose silk reeling machine that could measure reeling tension continuously with a load cell sensor. Decreasing the silk reeling speed and increasing the cocoon cooking time and reeling water temperature effectively reduced the reeling tension. In addition, by simplifying the thread guide, we were largely able to decrease the reeling tension in comparison with that of a conventional silk reeling machine.
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