Patent ID: 8691354

Claim:
A bi- or multi-modal polyethylene resin comprising: a high molecular weight (HMW), low density fraction, wherein the HMW, low density fraction has a density of from 0.908 to 0.928 g/cc and a high load melt index HLMI of from 2 to 12 dg/min; and a low molecular weight (LMW), high density fraction, wherein the LMW, high density fraction has a density of from 0.930 to 0.975 g/cc and a melt index MI 2 of from 0.5 to 10 dg/min; wherein the bi- or multi-modal polyethylene resin has a density of from 0.930 to 0.949 g/cc and a melt index MI 2 of from 0.3 to 1 dg/min; wherein the HMW, low density fraction and the LMW, high density fraction are produced either with two or more single site catalyst systems in a single reactor or with a single site catalyst system in two serially connected reactors; and wherein at least one of the single site catalyst systems is a metallocene catalyst system.