Patent ID: 8980964
Filing Date: 2015-03-17
Classification: B32B,C08J,C08L,Y10T

Abstract:
1. A film comprising a thermoplastic composition, wherein the thermoplastic composition comprises: at least one rigid renewable polyester having a glass transition temperature of about 0° C. or more; from about 1 wt. % to about 30 wt. % of at least one polymeric toughening additive based on the weight of the renewable polyester; from about 0.5 wt. % to about 15 wt. % of at least one interphase modifier based on the weight of the renewable polyester, wherein the interphase modifier facilitates debonding from the renewable polyester; and a polyepoxide modifier having a number average molecular weight of from about 7,500 grams per mole to about 250,000 grams per mole; wherein the thermoplastic composition has a morphology in which a plurality of discrete primary domains are dispersed within a continuous phase, the discrete primary domains containing the polymeric toughening additive and the continuous phase containing the renewable polyester, wherein a plurality of substantially homogeneously distributed voids are located adjacent to the discrete primary domains; wherein the film exhibits a tensile modulus in the machine direction and cross-machine direction of about 2500 Megapascals or less, a tensile elongation at break in the machine direction of about 10% or more, and a tensile elongation at break in the cross-machine direction of about 15% or more, wherein the tensile modulus and tensile elongation at break are determined at 23° C. according to ASTM D638-10, wherein the ratio of the glass transition temperature of the thermoplastic composition to the glass transition temperature of the renewable polyester is from about 0.7 to about 1.3.