Patent ID: 6770338
Filing Date: 2004-08-03
Classification: B32B,Y10S,Y10T

Abstract:
An oriented multiple layer polymer films structure comprising:(a) a first barrier layer, said barrier layer having two opposing surfaces; (b) a second layer adhered to one of said surfaces of said barrier layer wherein the second layer comprises a blend of two ethylene vinyl acetate copolymers and wherein the two ethylene vinyl acetate copolymers which comprise the blend of the second layer each have a vinyl acetate content of at least 18% and different melt indexes; (c) a third layer adhered to the other surface of said barrier layer comprising a blend of two ethylene vinyl acetate copolymers and wherein the two ethylene vinyl acetate copolymers which comprise the blend of the third layer each have a vinyl acetate content of at least 18% and different melt indexes; (d) a fourth layer adhered to said second layer wherein the fourth layer comprises a blend of two ethylene vinyl copolymers and processing aids wherein said processing aids are selected from the group consisting of antiblock agents and slip agents and wherein the two ethylene vinyl acetate copolymers which comprise the blend of the fourth layer each have a vinyl acetate content of at least 18% and different melt indexes; and (e) a fifth layer adhered to said third layer wherein the fifth layer comprises a blend of linear low density polyethylene and low density polyethylene; wherein said second, third and fourth layers have the same ethylene vinyl acetate (EVA) copolymer blend melt index in each layer.