Its use and manufacturing method thereof, and biaxially oriented coextruded white polyester film contains a cyclo-olefin copolymer, sealing properties and having a thermal moldability

摘要

(57) consists of a sealing outer layer A at least one layer of a base layer B of the first layer, [Abstract] The present invention is a biaxially oriented coextruded polyester film which thermoforming and having a sealing property, at least, on film characterized in that the base layer B contains cyclo olefin copolymer (COC). In the film of the present invention, the thermoplastic polyester constituting the outer layer A and the base layer B has an isophthalic acid units and polyethylene glycol units and diethylene glycol units and / or and / or. The invention further relates to the use of the thermoformed articles in high-speed machinery and method of manufacturing the film.