High tear films from hafnocene catalyzed polyethylenes
作者： John F. Szul , Ryan Winston Impelman , Laughlin G. Mccullough , James Mcleod Farley
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摘要: A polyethylene film having a balance of improved physical and mechanical properties method for making the same are provided. In one aspect, includes 1% secant modulus greater than 25,000 psi, dart impact resistance 500 g/mil, MD tear strength g/mil. comprises reacting ethylene derived units comonomer in presence hafnium-based metallocene at temperature from 70° C. 90° C., an partial pressure 120 psia 260 psia, to ratio 0.01 0.02 produce based polymer. The further extruding polymer conditions sufficient comprising
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