Patent ID: 8211985

Claim:
An extruded polymer film made from a polymer blend comprising: (a) from 5 wt % to 95 wt % of a HDPE having a density from 0.941 g/cm 3 to 0.980 g/cm 3 and an I 22 from 10 dg/min to 60 dg/min; and (b) from 95 wt % to 5 wt % of a grafted mPE, which is a reaction product of (i) a mPE having a density from 0.860 g/cm 3 to 0.935 g/cm 3 and an I 2 from 0.7 dg/min to 5.0 dg/min, and (ii) a silicon-containing grafting component, wherein the blend exhibits a high-temperature creep after extrusion at 100° C. that is at least 20% lower than a blend of the HDPE and the mPE that has not been grafted with a silicon-containing grafting component.