| 摘要 |
PURPOSE:To obtain a leathery napped sheetlike material, excellent in resistance to deterioration by perspiration and simultaneously improved in resistance to hydrolysis, deterioration by heat and light and dyeability and good in hand. CONSTITUTION:A leathery napped sheetlike material is obtained by impregnating polyamide ultra-fine fiber entangled nonwoven fabric having <=0.2 denier, preferably 0.005-0.1 denier average size with a polyurethane elastomer polymer liquid having >=60% strength retention in a state of a film, dyed with a green cobalt- containing dye and having 90-100mum thickness when kept both after 6 weeks at 110 deg.C and after 6 weeks at 70 deg.C and 95% relative humidity and <=10% area swelling degree in oleic acid, coagulating the liquid and then buffing the surface. The aforementioned elastomer polymer is obtained by copolymerizing (A) a polymer diol consisting essentially of a polycarbonate having 500-3000 molecular weight with (B) a polymer diol consisting essentially of polyethylene glycol having 500-3000 molecular weight, a 2-6C low-molecular diol and/or a diamine (a chain extender) and an aromatic diisocyanate so as to provide (70/30)-(97/3) weight ratio of the components (A)/(B). |
