繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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65 巻, 8 号
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  • 茶殻を有効利用した機能性「紙衣」材料の創製
    高橋 哲也, 笠井 稚子, 近藤 哲男
    2009 年 65 巻 8 号 p. 197-204
    発行日: 2009年
    公開日: 2009/09/15
    DOIhttps://doi.org/10.2115/fiber.65.197
    ジャーナル フリー
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    Various fiber materials were mixed with wasted tea leaves to attempt the preparation of new "KAMIKO" materials. When konjac pastes was applied to the surface of compounded papers using hemp and wasted tea leaves, the paper properties increased in tensile index, bursting index, and stiffness. On the other hand, konjac pastes application was found to increase the air permeance of the papers. Konjac pastes application was also found to extend time required for the papers to absorb water droplets, showing a decrease in water absorbency. Furthermore, when the papers were sewed on a machine, konjac pastes application was found to improve seam strength of the papers by about 20 N. Moreover, the papers with konjac pastes applied were tested for deodorization effect using ammonia gas. The result showed that the papers containing even a small amount, 10wt%, of wasted tea leaves exhibited an excellent deodorization effect and that konjac pastes application affected the effect very little. The results presented above showed that the use of hemp greatly improved mechanical properties of compounded papers using wasted tea leaves, whereas konjac pastes application also effectively improved the papers in seam strength.
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  • バインダーの添加による繰り返し洗濯が可能な茶殻配合紙の創製
    高橋 哲也, 笠井 稚子, 近藤 哲男
    2009 年 65 巻 8 号 p. 205-211
    発行日: 2009年
    公開日: 2009/09/15
    DOIhttps://doi.org/10.2115/fiber.65.205
    ジャーナル フリー
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    An attempt was made for the preparation of compounded papers using wasted tea leaves that could withstand repeated washing. Emulsion Polyamide-Epichlorohydrin copolymer was added as a binder to slurry containing crushed wasted tea leaves and hemp for paper making. When the resulting paper was measured for tensile strength under a wet condition, it was found markedly improved over a control paper without the emulsion. For instance, tensile strength was 2.1 Nm/g for a compounded paper containing 90 wt% hemp and 10 wt% wasted tea leaves but no binder, whereas the addition of the binder at 0.75 wt% improved tensile strength to 16.8 Nm/g. Compounded papers using wasted tea leaves were also very effective for deodorizing ammonia gas ; a paper containing a small amount, 10 wt%, of wasted tea leaves decreased the ratio of residual odor to 0.6 % in three hours. The addition of the binder was also found to keep the deodorization effect of the paper. Furthermore, a compounded paper using wasted tea leaves was repeatedly subjected to washing. The addition of the binder strikingly improved the washing durability of the paper that was subjected to washing repeatedly ; at an addition level of 0.75 wt%, the paper did not show any damage even after it was washed repeatedly 20 times. Further, the deodorization effect after washing was maintained. In fact, the ratio of residual order was very small at 2.1% or less in an hour even after the 20 times washing.
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  • Preparation of Cellobiose-conjugated Polyacrylamide and its Interaction with a Cellulose Matrix for Papermaking Application
    Shingo Yokota, Takefumi Ohta, Takuya Kitaoka, Toshihiro Ona, Hiroyuki ...
    2009 年 65 巻 8 号 p. 212-217
    発行日: 2009年
    公開日: 2009/09/15
    DOIhttps://doi.org/10.2115/fiber.65.212
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    Cellobiose, a structural subunit of cellulose, was utilized as a retention promoter of polymer additives to a cellulose matrix in an aqueous papermaking system. beta-D-Cellobiosylamine was conjugated with anionic polyacrylamide (A-PAM) through a condensation reaction using water-soluble carbodiimide. Glyco-modified A-PAM containing cellobiose residues (CB-A-PAM), which was added to a pulp suspension using tap water, had good retention efficiency and enhanced the strength of paper sheets. Surface plasmon resonance analysis gave useful information on the affinity of CB-A-PAM for a cellulose matrix. Cellobiose and A-PAM had negligible interaction with cellulose, but CB-A-PAM was significantly adsorbed on the cellulose surface. It was presumed that the many cellobiose moieties in one CB-APAM molecule cooperatively enhanced its affinity for cellulose. Such sugar−sugar interaction is a novel concept for the retention system of papermaking additives and the functional design of carbohydrate-based materials.
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  • 糖ラクトンを用いたPET 布の親水化加工（3）
    －グルコノラクトンとの反応におけるマイクロ波照射の影響－
    大江 猛, 吉村 由利香
    2009 年 65 巻 8 号 p. 218-222
    発行日: 2009年
    公開日: 2009/09/15
    DOIhttps://doi.org/10.2115/fiber.65.218
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    Our previous works indicated that reaction of PET fibers having amino groups with sugar-lactone enhanced the hygroscopic properties of PET fibers largely, but their reaction speed was very slow. In this paper, we investigated the irradiation conditions of microwave to shorten their reaction time. Interestingly, reaction of PET fibers with gluconolactone in the presence of 1000 W microwave irradiation was complete within 30 min, which reaction speed was about 50 times compared with the above conventional heating. Furthermore, their other fiber properties such as mechanical strength and dyeing ability were also examined to clarify the mechanism of this microwave-assisted reaction.
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技術報文
  • 阿波しじら織の物性
    羽賀 敏雄, 有内 則子
    2009 年 65 巻 8 号 p. 223-228
    発行日: 2009年
    公開日: 2009/09/15
    DOIhttps://doi.org/10.2115/fiber.65.223
    ジャーナル フリー
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    Awa Shijira fabric is a crepe cotton fabric made of cotton that is woven alternating the plain and the rib texture in the weft direction. Both the warp and weft yarns are usually sized with starch, before weaving. In the course of desizing process the fantastic crepe texture is formed due to the shrinkage of yarns especially in the weft direction. Thus, the geometrical roughness for the fabric desized tends to become obvious in the weft direction. The mechanical and surface properties for four kinds of traditional Awa Shijira fabrics were investigated comparing those for the plain cotton fabric. The roughness property measured based on KES has become marked in the weft direction for the fabrics having smaller values of the shear properties in the weft direction. Also, Shijira fabrics used in this study have shown higher frictional, bending and compression properties. Moreover, there observed no remarkable differences in the mechanical properties between nationally guaranteed traditional Shijira fabric and the one guaranteed by Tokushima prefecture.
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