Patent ID: 6696166
Filing Date: 2004-02-24
Classification: B32B,C08J,Y10S,Y10T

Abstract:
A monolayer thermoplastic film having a dart impact strength of greater than 600 grams per mil as determined by ASTM D1709 and a machine direction tear strength of greater than 350 grams per mil as determined by ASTM D9922 wherein said film is prepared by a blown film extrusion process using a linear low density polyethylene resin having 1) a melt index as determined by ASTM D1238, condition I2, of from 0.4 to 0.8 g/10 min; 2) a base resin density of from 0.915 to 0.919 grams per cubic centimeter; a COHO ratio of from 3 to 9; and wherein said blown film extrusion process uses an annular extrusion ring having a die gap from 35 to 120 mils and a blow up ratio ranging from 2 to 4.