Patent ID: 7943699

Claim:
A film comprising or produced from a composition, which comprises or is produced from (a) at least one polyester polymer derived from condensation of diol and aromatic dicarboxylic acid and (b) from 1 to 30 weight % of at least one copolymer wherein the polyester is polyethylene terephthalate, polytetramethylene terephthalate, polycyclohexane-dimethylene terephthalate, or polyethylene-2,6-naphthalene dicarboxylate; the copolymer is an E/X/Y copolymer; E comprises ethylene; X is vinyl acetate or alkyl (meth)acrylate ester; Y is carbon monoxide, sulfur dioxide, acrylonitrile, maleic anhydride, maleic acid diester, (meth)acrylic acid, maleic acid, maleic acid monoester, itaconic acid, fumaric acid, fumaric acid monoester, a salt thereof, glycidyl acrylate, glycidyl methacrylate, glycidyl vinyl ether, or combinations of two or more thereof; X is present from 0 to 50 weight % of said E/X/Y copolymer; Y is present from 0 to 35 weight % of said E/X/Y copolymer; the weight % of X and Y cannot both be 0; and E being the remainder; and the film is an oriented film.