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POLYURETHANE ELASTIC FIBER NONWOVEN FABRIC AND ITS PRODUCTION AND SYNTHETIC LEATHER USING THE SAME
POLYURETHANE ELASTIC FIBER NONWOVEN FABRIC AND ITS PRODUCTION AND SYNTHETIC LEATHER USING THE SAME
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机译:相同用途的聚氨酯弹性纤维非织造布及其生产和合成革
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摘要
PROBLEM TO BE SOLVED: To obtain the subject nonwoven fabric having high stretch performance and high tear strength as well, to provide a method for producing the nonwoven fabric, and to obtain a synthetic leather using the nonwoven fabric. SOLUTION: This polyurethane elastic fiber nonwoven fabric wherein polyurethane-based elastic fiber filaments are mutually fused and bonded is obtained by the following process: a thermoplastic polyurethane elastomer =92 in Shore A hardness is dehydrated to a moisture content of =150 ppm, and then put to melt spinning and issued through being accompanied by a high-speed air stream and subsequently accumulated in a sheet form at a temperature =35 deg.C lower than the Vicat softening temperature of the elastomer. The aimed nonwoven fabric thus obtained has a tensile elongation of =100%, elastic recovery at 50% elongation of =75%, and =5.5 gf in tear strength per basis weight.
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