Patent ID: 9174384
Filing Date: 2015-11-03
Classification: B29C,B29K,B29L,B32B,Y10T

Abstract:
1. A method comprising: forming a bilayer polymer film comprising an oriented polypropylene film and a metallocene-catalyzed polypropylene film, wherein the metallocene-catalyzed polypropylene film has a seal initiation temperature of between 105° C. and 120° C., and wherein the metallocene-catalyzed polypropylene film comprises metallocene catalyzed ethylene-propylene random copolymer having melt flow rate of from 10 g/10 min. to 500 g/10 min, wherein the bilayer polymer film does not include a tie layer between the oriented polypropylene film and the metallocene-catalyzed polypropylene film, and wherein the bilayer polymer film has a haze percentage of from 1.5% to 7%.