Patent ID: 7232866

Claim:
An ethylene polymer composition comprising a mixture of from 53 to 63% by weight based on the total weight of the composition of an ethylene polymer fraction (A) having a fluidity index MI 2 of at least 100 g/10 min, a density of at least 969 kg/m 3 and a molecular weight distribution M W /M n greater than 4, and from 37 to 47% by weight based on the total weight of the composition of a copolymer fraction (B) of ethylene and from 0.32 to 2.7 mole % of at least one alpha-olefin containing from 4 to 10 carbon atoms, said copolymer fraction (B) having a fluidity index MI 5 of 0.001 to 0.5 g/10 mm, a density of no more than 930 kg/m 3 and a molecular weight distribution M w /M n greater than 4, wherein the ratio of the MI 2 of polymer fraction (A) to the MI 5 of copolymer fraction (B) is greater than 30,000, said ethylene polymer composition having a density of at least 950 kg/m 3 , a fluidity index MI 5 of 0.05 to 2 g/10 min and a content of alpha-olefin containing from 4 to 10 carbon atoms, which are copolymerized with ethylene in copolymer fraction (B), of from 0.15 to 1 mole %.