Patent ID: 8247065

Claim:
A polymer composition comprising a blend of: a. from about 5 to about 95 wt % of a first polymer selected from the group consisting of high density polyethylene, linear low density polyethylene, low density polyethylene, medium density polyethylene, very low density polyethylene, differentiated polyethylene, and combinations thereof; and b. from about 95 to about 5 wt % of a second polymer comprising an ethylene-based polymer produced by gas-phase polymerization of ethylene with a catalyst having as a transition metal component a bis(n-C 3-4 alkyl cyclopentadienyl) hafnium compound, wherein said transition metal component comprises from about 95 mole % to about 99 mole % of said hafnium compound and wherein said ethylene-based polymer has: i. a melt index of from about 0.1 g/10 min to about 300 g/10 min; ii. a melt index ratio of from about 15 to about 45; iii. a weight average molecular weight (M w ) of from about 20,000 to about 200,000; iv. a molecular weight distribution (M w /M n ) of from about 2.0 to about 4.5; v. a M z /M w ratio of from about 1.7 to about 3.5; and vi. a CDBI of from 20% to 35%; and wherein said first polymer is different from said second polymer and wherein the composition has a Dart A Impact Strength of 850 to about 1100 g/mil and an average modulus of the MD and TD 1% Secant Moduli >35.0 kpsi.