Patent ID: 6383585
Filing Date: 2002-05-07
Classification: B32B,Y10S,Y10T

Abstract:
A sealable, biaxially oriented polyester film comprising:a base layer B, at least 80% by weight of which is composed of a thermoplastic polyester; an outer layer A, composed of a polymer or of a mixture of polymers comprising: at least 40% by weight of ethylene 2,6-naphthalate units; optionally up to 40% by weight of ethylene terephthalate units; and optionally up to 60% by weight of units from aliphatic diols, cycloaliphatic diols, aromatic diols, aliphatic dicarboxylic acids, cycloaliphatic dicarboxylic acids, aromatic dicarboxylic acids, or a combination thereof; and an opposite outer layer C having a sealing initialization temperature of &lE;130Â° C., wherein the compositions of layers A and C are not identical, and wherein layer C is amorphous.