Patent ID: 8916080
Filing Date: 2014-12-23
Classification: B29C,B29K,B29L,B32B,Y10S,Y10T

Abstract:
1. A method of making a biaxially oriented laminate film comprising: co-extruding a film comprising a core layer comprising a crystalline polylactic acid polymer of 90-100 wt % L-lactic acid units and only a single matting agent consisting of antiblock particles in an amount of 0.03-0.2 wt % of the core layer, and a heat sealable layer comprising an amorphous polylactic acid polymer having greater than 10 wt % D-lactic acid units and meso-lactide units on one side of the core layer; and biaxially orienting the film to impart a degree of cavitation around the antiblock particles such that the core layer exhibits a gloss at 60° of less than 80%.