Patent ID: 6241937
Filing Date: 2001-06-05
Classification: B29C,B29K,C08J

Abstract:
A method for manufacture of a polyolefin shaped article comprising the steps of:(a) first melt forming a composition principally containing 100 parts by weight of high density polyolefin and 3-30 parts by weight of a polymerizable unsaturated compound having a preferred affinity for the high-density polyolefin into a sheet or film,(b) calendering said sheet or film,(c) stretching the calendered sheet or film, and(d) then polymerizing the polymerizable unsaturated compound having flow modifier properties incorporated in the stretched sheet or film,wherein the polyolefin shaped article has a tensile strength of at least 0.40 GPa and a tensile modulus of at least 16.1 GPa, and the polymerized unsaturated compound remains in the polyolefin shaped article.