Sen'i Kikai Gakkaishi (Journal of the Textile Machinery Society of Japan)
Online ISSN : 1880-1994
Print ISSN : 0371-0580
ISSN-L : 0371-0580
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Volume 58, Issue 9
Displaying 1-3 of 3 articles from this issue
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Original Papers
  • Improvement of the Durability against High Humidity of PVA-Iodine Polarizer Film by Low Temperature Plasma Treatment
    Kang KOO, Won-Seok LYOO, Tae-Won SON, Young-Mi PARK
    2005 Volume 58 Issue 9 Pages T109-T114
    Published: 2005
    Released on J-STAGE: February 22, 2006
    DOIhttps://doi.org/10.4188/transjtmsj.58.T109
    JOURNAL FREE ACCESS
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    The effect of low temperature O2 plasma on the adhesive ability and optical durability for polarized PVA film has been investigate. Low temperature O2 plasma treatment modified the PVA film with physically and chemically. The surface of PVA film was modified by O2 plasma treatment and analyzed using ESCA, peel strength test and AFM image. The adhesive strength of all plasma treated PVA films was stronger than those of untreated one. Especially, the AFM image of the O2 plasma treated PVA film showed the maximum peak after 7min. under 100 and 150W output power. The adhesive strength of the O2 plasma treated PVA films also showed the maximum peel strength. These results suggested that the O2 plasma had the advantage of adhesive ability improvement of PVA film. We obtained that O2 plasma treated PVA iodine polarized film shows better durability in the experimental condition.
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  • Structures and Moisture Permeability of Polyurethane Films
    Miaki SHIBAYA, Hidenori DOBASHI, Yosuke SUZUKI, Hideaki ISHIHARA, Masa ...
    2005 Volume 58 Issue 9 Pages T115-T122
    Published: 2005
    Released on J-STAGE: February 22, 2006
    DOIhttps://doi.org/10.4188/transjtmsj.58.T115
    JOURNAL FREE ACCESS
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    Segmented polyurethane is a block copolymer which consists of hard and soft segments. In this study, moisture permeable segmented polyurethane films with different content of polytetramethyleneglycol (PTMG) and polyethyleneglycol (PEG) as soft segment were used. Three parameters of C1, C2 and higher order term Δh calculated by Mooney-Rivlin plots in the stress-strain relationship were measured. It was clarified that these mechanical parameters had relation with structure of films. Higher order term Δh and hydrogen bond concentration of urethane group by FT-IR measurement decreased with increasing PEG content in soft segment. That is to say, aggregate structure of hard segment decreased with increasing PEG content. Low PEG content samples showed transverse orientation in relation to aggregate structure of hard segment at initial state of elongation process. Transverse orientation has correlation with magnitude of aggregate structure. In the case of soft segment, degree of molecular restraint evaluated by dynamic mechanical analysis decreased with increasing PEG content. Aggregate structure grows through hydrogen bond of urethane group in hard segment. Also, it was clarified that aggregate structure was affected by soft segment and its outgrowth was inhibited.
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  • Effect of Moisture Regain on the UVR-Shielding Properties of Woven Fabrics
    Yukako YAMADA, Masami KOBAYASHI, Mari INOUE, Kin IWASAKI
    2005 Volume 58 Issue 9 Pages T123-T127
    Published: 2005
    Released on J-STAGE: February 22, 2006
    DOIhttps://doi.org/10.4188/transjtmsj.58.T123
    JOURNAL FREE ACCESS
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    In this study, we investigate the relationship between the UVR-shielding rate and the moisture regain of plain woven fabrics. Samples are 8 cotton fabrics and 4 polyester filament fabrics each of which have different porosity. In the case of cotton fabrics, the moisture cause fiber swelling in the wet condition and the porosity decrease with increase of the moisture regain. However, the UVR-shielding rate decrease with the increase of the moisture regain. It is assumed that the result is caused by the increase of the UVR transmitting through a fiber by the fiber swelling. The relationship between the moisture regain and the UVR-shielding rate result in linearity up to 80% of the moisture regain, and besides, significant difference on the inclination of each sample is not found. Therefore, we can estimate the UVR-shielding rate by using porosity under the standard condition and the moisture regain. In the case of polyester filament fabrics, it is found that we can estimate the UVR-shielding rate by the same way as the cotton fabrics. However, the range of the moisture regain in which the UVR-shielding rate can be estimated is smaller than that of cotton fabrics.
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