Patent ID: 6130278
Filing Date: 2000-10-10
Classification: B32B,C08J,C08L

Abstract:
A fine cell-containing polyester film comprising 70 to 97% by weight of a polyester and 3 to 30% by weight of a thermoplastic resin immiscible with polyester and produced by stretching at least one direction:said thermoplastic resin containing at least one lubricant selected from the group consisting of alcohols having not less than 10 carbon atoms, fatty acids having not less than 10 carbon atoms, esters of fatty acids having not less than 10 carbon atoms, metal salts of fatty acids having not less than 10 carbon atoms, and amides of fatty acids having not less than 10 carbon atoms, andthe difference in gloss between opposite surfaces of said polyester film being not less than 3%, and a gloss of one surface of said polyester film being not less than 25%.