Patent ID: 6127473
Filing Date: 2000-10-03
Classification: B29D,B29K,B32B,C08J

Abstract:
A polyester film,(A) which comprises a copolyester comprising terephthalic acid and dicarboxylic acid component which is at least one kind selected from isophthalic acid and naphthalene dicarboxylic acid, and ethylene glycol, and containing a lubricant having an average particle diameter of 0.001 to 2.5 .mu.m in an amount of 0.01 to 5.0% by weight,(B) which has a plane orientation coefficient of 0.115 to 0.140,(C) which has two or more endothermic peaks in DSC curve in the range of 170 to 270.degree. C.,(D) which has a peak temperature of 60 to 120.degree. C. of a complex elastic modulus (E"") in water, and(E) of which the polyester has an intrinsic viscosity of 0.50 to 0.60 dl/g.