Patent ID: 6037063
Filing Date: 2000-03-14
Classification: B29C,B29K,B32B,C08J,C08L,Y10T

Abstract:
A multi-layer composition comprising:a) a barrier layer; andb) a structural layer comprising:i) about 79 to about 99 weight parts thermoplastic crystallizable or crystalline polyester base resin having a glass transition temperature (""Tg"") of at least about 50.degree. C., and a melting point of at least about 150.degree. C. and an intrinsic viscosity (IV) of at least about 0.5; andii) an alkali metal salt of a polyester polymer in an amount sufficient to provide the structural layer with about 6.5.times.10.sup.-7 gram-atoms to about 15.times.10.sup.-6 gram-atoms of active alkali metal per gram of polyester defined in i).