Patent ID: 7632907

Claim:
A polyethylene film comprising a polymer composition, the film having the following characteristics: a total energy dart drop, measured in accordance with ASTM D4272, of greater than about 0.45 ft.lbf; a dart drop impact strength, measured in accordance with ASTM D1709 Method A, of greater than about 135 g; and a moisture vapor transmission rate, measured in accordance with ASTM F1249 at 100° F. and 90% relative humidity, of less than about 0.85 g-mil/100 square inch/24 hr, wherein said ASTM tests are performed on a test specimen having a 0.8 mil thickness, wherein the polymer composition has a density of equal to or greater than 0.940 g/cc, and wherein the polymer composition has a Carreau-Yasuda equation “a” parameter value of greater than 0.3 when the dynamic complex viscosity versus frequency scan data obtained at 190° C. are fitted to the Carreau-Yasuda equation with an n value of 0.1818.