Patent ID: 6565936
Filing Date: 2003-05-20
Classification: B32B,Y10S,Y10T

Abstract:
A film laminate comprising a biaxially oriented polyester film and another film laminated onto the biaxially oriented polyester film, wherein said biaxially oriented polyester film comprises:(a) a base layer at least 80% by weight of which is composed of a thermoplastic polyester, (b) at least one cover layer for the base layer, and (c) a metallic or ceramic layer located on the cover layer, where the cover layer is composed of at least one polymer, at least one copolymer, or a mixture thereof, wherein said polymer or copolymer comprisesat least 40% by weight of ethylene 2,6-naphthalate units, up to 40% by weight of ethylene terephthalate units, and from 0 to 60% by weight of units chosen from one or more aliphatic diols, cycloaliphatic diols, aromatic diols, aliphatic dicarboxylic acids, cycloaliphatic dicarboxylic acids, and aromatic dicarboxylic acids that are not ethylene 2,6-naphthalate or ethylene terephthalate, with the proviso that the Tg2 value of the biaxially oriented polyester film is greater than the Tg2 value of the base layer but smaller than the Tg2 value of the cover layer.