Patent ID: 6068936
Filing Date: 2000-05-30
Classification: C08J,C08L,Y10S,Y10T

Abstract:
A film structure comprising a major amount of olefinic polymer which includes at least one mixed-polymer layer containing a non-cyclic polyolefin, hereafter referred to as a polyolefin, and a cycloolefin polymer, hereafter referred to as a COP, the polymer composition of said mixed-polymer layer being essentially homogeneous and comprising, based on the weight of said layer:at least 50% by weight of polyolefin, anda polyolefin-compatible amount, which is less than 50% by weight, of COP,wherein said COP is essentially amorphous and has a mean molecular weight, M.sub.w, in the range from 200 to 100,000, and the M.sub.w of the COP ranges from 0.05 to at most 50% of the M.sub.w of said polyolef in, said COP containing up to 20% by weight of comonomer.