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    • 21. 发明公开
    • SHEET-SHAPED OBJECT AND PROCESS FOR PRODUCING SAID SHEET-SHAPED OBJECT
    • VERFAHREN ZUR HERSTELLUNG EINESLEDERÄNLICHENFOLIENFÖRMIGENOBJEKTS
    • EP2927368A1
    • 2015-10-07
    • EP13859092.2
    • 2013-11-27
    • Toray Industries, Inc.
    • KOIDE, GenNISHIMURA, MakotoTSUCHIMOTO, Takahiro
    • D06M15/564D06M11/00D06M15/00D06M15/333D06N3/14
    • D06M15/333D06M15/564D06N3/0004D06N3/14D06N2201/10D06N2209/103D06N2209/105D06N2211/10D06N2211/14D06N2211/26D06N2211/28Y10T428/268
    • The present invention provides a process for producing a sheet-shaped material having both an elegant, napped appearance and a soft texture and exhibiting a good abrasion resistance, the process comprising the successive steps of:
      (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 comprising 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.
    • 本发明提供一种片状材料的制造方法,其具有优雅,起绒的外观和柔软的质感并具有良好的耐磨性,该方法包括以下连续步骤:(i)将水溶解在聚乙烯醇 皂化度为98%以上,聚合度为800〜3500,制备乙酸甲酯,乙酸和甲醇的浓度为50ppm以下的聚乙烯醇水溶液,(ii)将聚乙烯醇 醇水溶液添加到包含微纤维生成纤维作为其主要成分的纤维质基材上,使得纤维质基材的纤维质基质中所含的纤维的质量为0.1〜50质量% iii)从作为主要成分的纤维状基材中所含的微纤维生成纤维生成平均单纤维直径为0.3〜7μm的微纤维,(iv)ad 将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质的水性聚氨酯,和(v)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基材中除去聚乙烯醇。