| abstract |
The invention relates to a heat-sealable coextruded, biaxially oriented polyester film which is peelable with respect to nonpolar substrates, for example PS and PP, and which encompasses a base layer (B) and an outer layer (A), in whichn a) the base layer (B) is mainly formed from a copolyester containing ethylene terephthalate units and ethylene isophthalate units, where the proportion of ethylene isophthalate units in the copolyester is from 3 to 15 mol %, and b) the outer layer (A) is formed fromn 30 to 95% by weight of ethylene-polar-ethylene copolymer and 5 to 70% by weight of polyester, where the proportion of polar-ethylene in the copolymer is from 2.5 to 15 mol %. n nn The outer layer (A) polyester preferably includes an ethylene-terephthalate-ethylene-isophthalate copolyester. The film is particularly suitable as peelable film (lid film) for food or drink containers. |