Patent ID: 9073674
Filing Date: 2015-07-07
Classification: B05D,B32B,B65D,C08G,C08J,C08K,C08L,C09D,C09J,Y10T

Abstract:
1. A method of making a multilayer film, comprising the steps of a) applying a coating liquid to a substrate comprising a polymeric base layer and an adhesion promoter in a layer on a surface of the polymeric base layer to receive the coating liquid, the coating liquid consisting of a solvent, a PLA polymer, and optionally one or more of an antifog agent, a slip additive, an antioxidant, inorganic particles and dispersed adhesion promoter; and b) removing the solvent to form a heatseal layer comprising the PLA polymer; wherein the adhesion promoter is a copolyester resin consisting of units of one or more glycols, at least one aliphatic dicarboxylic acid of the formula C