Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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Volume 63, Issue 12
Displaying 1-14 of 14 articles from this issue
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Column
Feature
The Society of Fiber S & T, Japan Prize for New Fiber Technology
Series
Transactions
  • Selection of Three-Dimensional Garment Image Style Based on Three-Dimensional Body Shape Image Classification of Young Women
    Tomoe Masuda, Kaori Murakami, Hidehiko Okabe, Mikako Nishi
    2007 Volume 63 Issue 12 Pages 277-286
    Published: 2007
    Released on J-STAGE: January 15, 2008
    DOIhttps://doi.org/10.2115/fiber.63.277
    JOURNAL FREE ACCESS
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    Useful information for garment selection support of young women's 3 Dimensional body (hereafter 3Dbody) rotating shape images and well-suited garment designs according to these 3D-body shapes were investigated using image evaluations (scale 1 to 5) on the same base. The full-length 3D-body shape images presented as the rotating simulations of thirteen young female models were categorized into five types (Groups by cluster analysis) using their three principal component scores calculated by means of six body image key words (As : A1 to A6). We extracted the de-emphasis or emphasis evaluations (Cs : C1 to C18) of the partial 3D-body shape images (Bs : B1 to B18) using the garments on the five full-length 3D-body types and the suitability of the twelve 3D-garment design images (Ds :D1 to D5) on the rotating body shape of each of the As.
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  • Plasma Surface Modification of Aromatic Liquid Crystal Polymers, and Its Resultant Improvement in Adhesive Strength with Copper Thin Films
    Kazuo Narushima, Hiroki Ikeji, Yong Woo Park, Yoshihiro Isono, Moha ...
    2007 Volume 63 Issue 12 Pages 287-294
    Published: 2007
    Released on J-STAGE: January 15, 2008
    DOIhttps://doi.org/10.2115/fiber.63.287
    JOURNAL FREE ACCESS
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    Surface modification of aromatic LCP surfaces with plasma treatment was carried out to improve the adhesive strength at LCP/Cu interfaces. Plasma treatment to a polymer surface is known to introduce functional groups and to bring about etching action thereon. This study was intended to investigate which or both functional group introduction and etching action contributes to adhesive strength improvement. The effect on the adhesive strength of ordinary plasma treatment and remote plasma treatment was evaluated. Remote plasma treatment is possible to irradiate mainly radicals on LCP surface. The following three subjects were discussed in this study : (1) plasma treatment increases the adhesive strength at LCP/Cu interfaces ; (2) plasma treatment produces oxygen functional groups and nitrogen functional groups and led to etch LCP surfaces, all of which contribute to adhesive strength ; and (3) the oxygen functional groups, nitrogen functional groups, and etching action work simultaneously to enhance adhesive strength by their synergistic effects.
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  • Antibacterial Ability and Physical Properties of Poly (L lactic acid) Film Blended with Baked Shell Powder
    Koki Onda, Atsushi Hamada, Hiroshi Mitomo
    2007 Volume 63 Issue 12 Pages 295-300
    Published: 2007
    Released on J-STAGE: January 15, 2008
    DOIhttps://doi.org/10.2115/fiber.63.295
    JOURNAL FREE ACCESS
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    A poly (L-lactic acid) (PLLA) film, which was blended with baked shell powder, was made and the antibacterial ability, biodegradability and physical properties of it were evaluated. The PLLA film blended with the powder had no antibacterial ability although the PLLA itself had strong antibacterial ability. Moreover the biodegradation rate was faster by blending the powder in PLLA film, and in the thermal and mechanical properties, which are obtained by differential scanning calorimeter (DSC) and tensile tests, there was slightly difference between the unblended PLLA film and the blended PLLA film. So, these results suggest that the antibacterial ability of PLLA is caused by lactic acid which is created in hydrolysis and that the powder neutrizes the lactic acid.
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  • A Photoinduced Hydrogen Evolution System Using Polymer-Supported Tin Porphyrin
    Manami Morisaki, Kazuki Enomoto, Tomoko Ito, Isao Tabata, Kenji H ...
    2007 Volume 63 Issue 12 Pages 301-306
    Published: 2007
    Released on J-STAGE: January 15, 2008
    DOIhttps://doi.org/10.2115/fiber.63.301
    JOURNAL FREE ACCESS
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    We examined the photoinduced evolution of hydrogen using a tin meso-tetraphenylporphyrin tetrasulfonate (SnTPPS) and tin meso-tetraphenylporphyrin (SnTPP) supported in various polymer films and fabrics. The hydrophilic polymers are more effective than the hydrophobic polymer as a supporter, because water penetration is easier and also the mobilities of the porphyrin molecules as well as protons and electrons in the film. A larger amount of hydrogen evolved using the SnTPPS-adsorbed keratin film(derivation of wool) than other film systems. The results indicated that keratin is a good electron transfer material. The evolved hydrogen was 25 - 160 times that in other SnTPP-supported polymer films. Moreover, the fabric systems were more effective than the polymer film systems, because of the much higher specific surface area. In the SnTPP/PET fabric system, the turnover number exceeded 400 under the highpressure mercury lamp, which was about 1600 times larger than that under the tungsten lamp.
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  • Electrospinning of Poly (ether sulfone) and Evaluation of the Filtration Efficiency
    Kazuhiro Nakata, Seong Hun Kim, Yutaka Ohkoshi, Yasuo Gotoh, Masano ...
    2007 Volume 63 Issue 12 Pages 307-312
    Published: 2007
    Released on J-STAGE: January 15, 2008
    DOIhttps://doi.org/10.2115/fiber.63.307
    JOURNAL FREE ACCESS
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    To produce high heat-resistant air filter, filtration properties of poly (ether sulfone) (PES) made by various electrospinning conditions were evaluated. The PES webs of 0.4-1.1 um average diameter fiber were obtained from 35-40 wt% PES / N,N- Dimethylacetamide (DMAc) solution. The diameter profile of electrospun PES web was clearly affected by PES concentration of the spinning dope and feeding rate of the dope, while the take-up speed effects little. The needle-collector distance affects the diameter profile for higher feeding rate conditions. The pore size of these webs was 1.3 - 5.6 um, which was decided not only average fiber diameter but also fiber diameter variation. Both filtration efficiency and pressure loss were dropped steeply at about 3.0 um of pore size. For the web having a pore size of 3.2 um, the pressure loss decrease to 215 Pa, while the filtration efficiency for 0.3 μm particle kept 99.9998 %, which satisfied the HEPA requirement.
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