Patent ID: 6528597
Filing Date: 2003-03-04
Classification: C08F,C08J,Y10S

Abstract:
A film layer comprising an ethylene-alpha-olefin polymer produced by polymerization of monomers of ethylene and an alpha-olefin with a catalyst having as a transition metal component a bis(n-C3-4 alkyl cyclopentadienyl) hafnium compound and a bis(n-C3-4 alkylcyclopentadienyl) zirconium compound and wherein said hafnium compound is 95 mole % to 99.9 mole % of said transition metal component and said ethylene-alpha-olefin polymer has an alpha-olefin content of from 1 to 5 mole %, a melt index (MI, g/10 min.) of 0.1 to 100, a melt index ratio (MIR) of 20 to 35, a weight average molecular weight (Mw) of 25,000 to 150,000, a molecular weight distribution (Mw/Mn) of 2.5 to 7, a Mz/Mw ratio of 2 to 3.5.