White, sealable, thermoformable biaxially oriented and coextruded polyester film with cycloolefin copolymer, process for its production, and its use

摘要

The invention relates to a white, sealable, thermoformable, biaxially oriented and coextruded polyester film that comprises at least one base layer B and at least one sealable cover layer A, wherein at least the base layer B contains a polyester starting compound and a cycloolefin copolymer (COC). The polyester starting compound should contain an increased amount of diethylene glycol, polyethylene glycol or isophthtalic acid. The invention further relates to a method for producing the inventive polyester film and to the use thereof for thermoformed articles, especially on high-speed machines.