Patent ID: 8574695
Filing Date: 2013-11-05
Classification: B32B,B65D,Y10T

Abstract:
1. A multilayer film comprising (i) a core layer comprising a major fraction by weight of the core layer of a poly(hydroxy acid), (ii) a polymeric barrier receiving layer adjacent to one side of the core layer and comprising amorphous poly(hydroxy acid) blended with an amorphous aromatic copolyester in which a major fraction by weight of the polymeric barrier receiving layer is amorphous aromatic copolyester, and (iii) a barrier layer adjacent the polymeric barrier receiving layer opposite the core layer, the barrier layer comprising an inorganic compound as a major fraction by weight of the barrier layer, in which the poly(hydroxy acid) is at least about 85% by weight of the total in the multilayer film of the poly(hydroxy acid) and the amorphous aromatic copolyester.