Patent ID: 6218011
Filing Date: 2001-04-17
Classification: D01F,Y10T

Abstract:
Non-post-drawn polyolefin fibers produced by melt processing and having high strength and elongation, comprising:A) about 0.05% to 10% by weight of a modified polypropylene polymer with a melt index of about 0.1 to 50 g/10 min at about 230.degree. C./2.16 kg and a ratio of an intrinsic viscosity of said modified polypropylene polymer to an intrinsic viscosity of an unmodified polypropylene polymer with about a same weight average molecular weight of about 0.20 to 0.95 andB) about 99.95% to 90% by weight of unmodified propylene polymer,said modified propylene polymer selected from the group consisting ofa) a polypropylene selected from the group consisting of propylene homopolymer, a copolymer of propylene and ethylene, and a copolymer of propylene and an .alpha.-olefin having 4 to 18 carbon atoms, and a multifunctional, ethylenically unsaturated monomer wherein said polypropylene and said unsaturated monomer are treated in presence of ionizing radiation or of free radical-forming agents,b) a functionalized polypropylene and at least one multifunctional compound of opposite reactivity wherein said functionalized polypropylene and said at least one multifunctional compound of opposite reactivity are reacted with one another, andc) a polypropylene containing a hydrolyzable silane group being hydrolytically condensed.