| abstract |
A film, which comprises: a surface layer comprising one or more polymers selected from polystyrene and modified polyester selected from one or more glycol modified polyester and acid modified polyester; and a base layer comprising one or more polymers selected from an alpha-olefin / cyclic olefin copolymer, and an aromatic alpha-olefin / vinyl copolymer, wherein: the film has a free shrinkage at 100 ° C, at least one direction, of at least 10%, provided that the surface layer comprises polystyrene, and the polymer of the base layer or the various polymers of the base layer have a glass transition temperature of less than 50 ° C. |