Patent ID: 7560516

Claim:
A high density multimodal polyethylene composition, that has a density of 0.935 g/cc or more, and that includes a blend of a first polyethylene component and a second polyethylene component, in which: the first polyethylene component includes a bimodal polyethylene wherein the first polyethylene component includes a bimodal polyethylene that includes a high molecular weight component and a lower molecular weight component, the bimodal polyethylene being made from a polymerization conducted in the presence of a dual catalyst system that includes metallocene; and the second polyethylene component includes a unimodal polyethylene that is made from a polymerization conducted in the presence of a metallocene having two cyclopentadienyl rings, wherein the second polyethylene component is different from the first polyethylene component; wherein the unimodal polyethylene occupies less than 15 wt % of the composition, wherein the FI of the composition is 4 to 20 as determined according to ASTM-1238 Condition E, 2.16 Kg at 190° C., and wherein the Elmendorf Tear ratio (TD/MD) of the composition is 10 or less, based on a 1.0 mil film made from the composition.