SUEDE-LIKE NAPPED SHEET EXCELLENT IN SWEAT RESISTANCE

摘要

This invention provides in a suede-like napped sheet comprising a polyamide ultrafine fiber and a polyurethane elastic polymer, the improvement that the polyurethane elastic polymer has, in a state of a film 90 to 110.mu. m thick dyed with a green series cobalt-containing dye, a strength retention ratio of 60 % or more after 6 weeks at 110.degree.C, a strength retention ratio of 60 % or more after 6 weeks at 70.degree.C and 95 % RH and an area swelling ratio of 10 % or less after 2 hours immersed in oleic acid of 25.degree.C. The sheet of this invention is soft and excellent in hydrolysis resistance, oxidative decomposition resistance and sweat resistance, particularly among them in durability against a higher fatty acid, one of sweat components, and further has dyeability.