Patent ID: 7834092

Claim:
A film comprising or prepared from a composition comprising about 60 to about 97 weight % of poly(lactic acid) and about 0.2 to about 40 weight % of an impact modifier wherein the film is an oriented film; and the impact modifier comprises an ethylene copolymer that comprises repeat units derived from (a) about 20 to about 95 weight % ethylene, (b) about 0.5 to about 25 weight % of one or more first olefins of the formula CH 2 ═C(R 3 )CO 2 R 4 ; (c) 3 to about 70 weight % of one or more second olefins of the formula CH 2 ═C(R 1 )CO 2 R 2 , and (d) 0 to about 20 weight % carbon monoxide where R 1 is hydrogen or an alkyl group with 1-8 carbon atoms, R 2 is an alkyl group with 1-8 carbon atoms, where R 3 is hydrogen or an alkyl group with 1-6 carbon atoms, R 4 is glycidyl, the weight % of the poly(hydroxyalkanoic acid) and the impact modifier are based on the total weight of the poly(hydroxyalkanoic acid) and the impact modifier, and the weight % of ethylene, CH 2 ═C(R 1 )CO 2 R 2 , or CH 2 ═C(R 3 )CO 2 R 4 is based on the copolymer weight.