CONTINUOUS MOLDED ARTICLE OF POLYURETHANEUREA AND PRODUCTION METHOD THEREOF

摘要

A continuous molded article of a polyurethaneurea fiber or film, etc., having a complex index of refraction ( DELTA n) under a tension-free state of 1.0 x 10<-4> to 8.0 x 10<-4>, a cross-linking density (N100) at 100 % elongation of at least 5.0 x 10<26>/m<3>, a cross-linking density (N400) at 400 % elongation of 4.0 x 10<26> to 3.0 x 10<27>/m<3>, a cross-linking density (Nt) at breakage of at least 1.6 x 10<27>/m<3> and a ratio (N400/N100) of the cross-linking density at 400 % elongation to the cross-linking density at 100 % elongation of 0.9 to 1.3. A method of production of such a molded article is also disclosed. This continuous molded article has sufficiently high initial stress, breaking strength and breaking elongation and exhibits a small rise of the stress in the medium elongation range.