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    • 70. 发明申请
    • SHEET-SHAPED MATERIAL AND PROCESS FOR PRODUCING SAID SHEET-SHAPED MATERIAL (AS AMENDED)
    • 用于生产表面材料的片材材料和方法(如修订)
    • US20150315741A1
    • 2015-11-05
    • US14647923
    • 2013-11-27
    • TORAY INDUSTRIES, INC.
    • Gen KoideMakoto NishimuraTakahiro Tsuchimoto
    • D06M15/333D06N3/14D06M15/564
    • D06M15/333D06M15/564D06N3/0004D06N3/14D06N2201/10D06N2209/103D06N2209/105D06N2211/10D06N2211/14D06N2211/26D06N2211/28Y10T428/268
    • The present invention provides a process including: (i) dissolving, in water, a polyvinyl alcohol having a degree of saponification of 98% or more and a degree of polymerization of 800 to 3500 to prepare a polyvinyl alcohol aqueous solution in which the concentrations of methyl acetate, acetic acid and methanol are 50 ppm or less, (ii) adding the polyvinyl alcohol aqueous solution to a fibrous substrate having microfiber-generating fibers as its main constituent, so that the fibrous substrate has the polyvinyl alcohol in an amount of 0.1 to 50% by mass based on the mass of the fibers contained in the fibrous substrate, (iii) generating microfibers having an average single fiber diameter of 0.3 to 7 μm from the microfiber-generating fibers contained in the fibrous substrate as its main constituent, (iv) adding a waterborne polyurethane to the fibrous substrate comprising the microfibers as its main constituent and having the added polyvinyl alcohol, and (v) removing the polyvinyl alcohol from the fibrous substrate comprising the microfibers as its main constituent and having the added waterborne polyurethane.
    • 本发明提供一种方法,其包括:(i)在水中溶解皂化度为98%以上,聚合度为800〜3500的聚乙烯醇,制备聚乙烯醇水溶液, 甲酸乙酯,乙酸和甲醇为50ppm以下,(ii)将聚乙烯醇水溶液加入到具有超细纤维生成纤维作为其主要成分的纤维基材上,使得纤维基材的聚乙烯醇的量为0.1 至50质量%,(iii)从纤维质基材中含有的微纤维生成纤维作为主要成分,生成平均单纤维直径为0.3〜7μm的微纤维, (iv)将水性聚氨酯添加到包含微纤维作为其主要成分并具有添加的聚乙烯醇的纤维基材中,和(v)除去聚乙烯醇 从包含微纤维作为其主要成分并具有添加的水性聚氨酯的纤维质基材。