POLYESTER FILM

摘要

Provided is a polyester film which prevents organic paint from being exuded to the surface of the film and shows excellent heatproof property, therefore it enables to keep color in spite of repeated heating and fusion. The polyester film is characterized by including a polyester resin layer which is composed of 0.2-0.9wt% of ethylene terephthalate cyclic trimer, 0.01-5wt% of organic paint and polyester resins having an ethylene terephthalate unit as a main component and 1.5-8 mol% of copolymerization component. The polyester resin is all high molecular substances in which a covalent bond combining monomer remaining radicals and monomer remaining radicals in a main branch is an ester combination.