Patent ID: 7396881

Claim:
A process for making a polyethylene blend composition comprising: blending (a) a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm 3 with a sufficient amount of (b) a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm 3 , to provide a polyethylene blend having: a density of from 0.930 to 0.955 g/cm 3 , a melt index of 1.5 to 12 g/10 min, an ESCR value of at least 250 hrs, and an Izod impact strength of at least 120 J/m, for a 3.17 mm sample at 40 C, wherein the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm 3 , and wherein at least one of the first and second polyethylenes is a metallocene-catalyzed polyethylene.