Patent ID: 7211620

Claim:
A polyolefin composition comprising by weight of the total composition (A) 35 to 91% of a high density polyethylene having a density of 0.945 to 0.965 and a melt index as determined by ASTM D1238 of 0.01 to 0.1 g/10 min; (B) 0 to 45% of a linear low density polyethylene having a density of 0.918 to 0.923 and a melt index of, as determined by ASTM D1238, of 0.75 to 1.40 g/10 min; (C) 1 to 3.1% of a particulate magnesium silicate; and (D) 7.5 to 15% of an alkali or alkaline earth metal carbonate.