繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
63 巻, 11 号
選択された号の論文の12件中1~12を表示しています
時評
特集 国際ナノファイバーシンポジウム2007 II
レポート
一般報文
  • 大松 一喜, 杉本 英樹, 仲西 英二, 赤坂 哲司, 猪俣 克弘
    2007 年 63 巻 11 号 p. 247-251
    発行日: 2007年
    公開日: 2007/12/10
    ジャーナル フリー
    PMMA is used as the most popular dental resin and show high strength and transparency, but is weak against an impact. Although introduction of rubber domain into a matrix polymer has been widely investigated to improve the impact resistance, strength and surface hardness of materials are decreased by rubber element. Therefore, in this study, the core-shell composite nanoparticles containing silica particles in rubber domain were prepared by emulsion polymerization with methyl methacrylate (MMA) and ethyl acrylate. These particles were added to MMA and bulk polymerization was carried out to obtain test specimen. The physical properties including impact resistance were evaluated by three-point bending test, falling ball impact test and Vicker's hardness test. The impact resistance of test specimen was improved in comparison with the test specimen prepared with core-shell particles without silica particle. Moreover, deterioration in mechanical properties was depressed by addition of silica particle to rubber element.
  • Chonyu Chen, Limei Fan, Hanchien Wang
    2007 年 63 巻 11 号 p. 252-255
    発行日: 2007年
    公開日: 2007/12/10
    ジャーナル フリー
    Seventeen Taiwanese commonly used medicinal plant dyes were extracted and used for dyeing cotton fabric pre-treated with extensible antenna-coupling microwave plasma system. The anti-Staphylococcus aureus' ability and washing fastness of the dyeing cotton fabric were compared with and without plasma pre-treatment. The plasma condition was set at oxygen pressure 0.2 Torr, power 800 W and 5 sec treatment time. After the plasma pre-treatment, the results showed that 13 plant-dyed cotton fabrics increased the anti-Staphylococcus aureus inhibition zone. As of washing fastness of plasma treated plant dyed cotton fabric, the green tea, gromwell root and cornus fruit showed the best rating of 4.
  • 高橋 哲也, 近藤 哲男, 笠井 稚子, 横田 博志, 国武 哲則
    2007 年 63 巻 11 号 p. 256-263
    発行日: 2007年
    公開日: 2007/12/10
    ジャーナル フリー
    An attempt to develop a paper making method for a functional paper containing green tealeaves wastes disposed in industrial use was made. The authors successfully produced papers containing wasted green tealeaves ,not exceeding 60wt%, grounded by a mass-colloider. Antibacterial properties of these papers were investigated. Regarding the papers in a dry condition, the tensile index and bursting index were not significantly different depending on the kinds of tealeaves. The strength was decreased as increasing in the content of tealeaves. The tensile index of the papers were markedly lower in a wet condition when compared in a dry state. By addition of latex binder at a content of 0.3 wt%, the tensile index of the papers was 8.5-15.8 N·m⁄g in a wet condition for all kinds of the papers, which was similar to that for a paper made from 100 wt% pulp. Antibacterial test for Staphylococcus aureus was performed with various kinds of papers containing wasted tealeaves. Growth inhibition effects on the bacterium were noted in the papers containing wasted tealeaves, but not recognized in papers made from 100 wt% pulp. In particular, the antibacterial effects for a paper containing wasted black tealeaves were fairly high. It was demonstrated that the antibacterial effects were not reduced even by mixing a latex binder at 0.3 wt%. Further, the fiber assembled structure of the papers was observed by optical and scanning electron microscopes to be a multi-layered structure by stacking with a thin layer of pulps including the grounded tealeaves. These findings suggest that the tealeaves-containing papers with the unique layered structure can be a functional material for environmental friendly and sanitary usage.
  • 吉勝 友美, 坂田 佳子, 菅井 實夫, 上甲 恭平
    2007 年 63 巻 11 号 p. 264-270
    発行日: 2007年
    公開日: 2007/12/10
    ジャーナル フリー
    To clarify what components of CMC contribute to the oxidation reaction, the effects of pretreatment of wool fibers using ethylenediaminetetraacetic acid (EDTA) solution and premordanting with the solution of metal salts on the dye uptake of the dinuclear oxidation dyes into wool fibers were investigated. The dye uptake of the wool samples pretreated with EDTA solutions decreased apparently compared to that of the intact wool sample. On the contrary, the wool samples premordanted with copper, iron and nickel salts allowed the dye uptake of oxidation dye inside the wool fiber to increase. These findings indicate that the metal ions presented primarily within the intercellular materials play an important role in developing the colored oxidation dye on⁄into the fiber. The presence of transition metal ions in the intercuticular material causes hydrogen peroxide to undergo radical decomposition, leading to oxidizing species by means of Haber-Weiss mechanism. They take part as initiator of oxidation reaction, where the dye precursor is electrochemically oxidized to its corresponding Wurster salt.
技術報文
  • Won Young Jeong, Jung Woo Park, Masayoshi Kamijo, Yoshio Shimizu, Seun ...
    2007 年 63 巻 11 号 p. 271-275
    発行日: 2007年
    公開日: 2007/12/10
    ジャーナル フリー
    Artificial leather used in this study was prepared by wet coagulation method with polyurethane resin in a laboratory instrument. Various needle-punching nonwoven fabrics were used as substrate material, which are widely used in the shoe industry as the substrate of insole or artificial leather. To estimate comfort properties with the finishing for artificial leather, we measured air, water vapor, and thermal transport properties; and then we evaluated the changes of each property of finished nonwoven fabrics which were dipped and coated with polyurethane resin. The changes due to the dipping and coating processes for artificial leather may give rise to a feeling of discomfort. Water vapor permeability and heat keeping rate decreased, but thermal conductivity and a cool feeling increased with the finishing process. After dipping and coating processes, there was little significant difference in the transport properties of base materials. Therefore, the transport characteristics were more closely related to the finishing condition than the constructive characteristics of the base materials.
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