发明授权
US3899292A Process for crumpling synthetic suede 失效
破碎合成方法

Process for crumpling synthetic suede
摘要:
Preparing suede-like leather sheet materials by passing a napped sheet with a fluid through a venturi-nozzle having a predetermined inner area. The sheet has naps of superfine denier fiber at least on one surface, and comprises (a) a non-woven fabric made up to 0.01-0.3 denier superfine staple fibers of breaking strength below 3 grams and an elongation at break of 60180 percent and (b) a polyurethane elastomer obtained by reacting a diol mixture by weight of about 20-40 parts of polycaprolactone diol of a molecular weight of about 1000-3000 and about 60-80 parts of polytetramethyleneetherglycol of a molecular weight of about 1000-3000 with an organic diisocyanate and a diamine chain extender.
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