Nonwoven textile material from blends of propylene polymer material and olefin polymer compositions

Claim 1

A nonwoven textile material comprising fibers obtained from a blend of (A) 5 to 95% of a propylene polymer material selected from the group consisting of a crystalline propylene homopolymer having an isotactic index of greater than 90 and a copolymer of propylene and ethylene having an isotactic index of greater than 85 and an ethylene content of less than 10%, and (B) 95 to 5% of an olefin polymer material selected from the group consisting of: (1) a random propylene terpolymer consisting essentially of: (a) from about 85 to 96% propylene, (b) from about 1.5 to 5% ethylene, and (c) from about 2.5 to 10% C 4-8 alpha-olefins; (2) a propylene polymer composition consisting essentially of: (a) 30 to 65% of a copolymer of propylene with a C 4-8 alpha-olefin containing from 80 to 98% propylene, and (b) 35 to 70% of a co- or terpolymer of propylene with ethylene and, optionally, a C 4-8 alpha-olefin; (3) a propylene polymer composition consisting essentially of: (a) 30 to 60% of linear low density polyethylene, and (b) from 40 to 70% of one or more crystalline copolymers of propylene with one or more comonomers selected from ethylene or C 4-8 alpha-olefins, or combinations thereof; and (4) a propylene polymer composition consisting essentially of: (a) from 10 to 50% of a propylene polymer having an isotactic index of greater than 80, or a copolymer of propylene with ethylene or a C 4 -C 8 alpha-olefin or combinations thereof, containing over 80% propylene and having an isotactic index greater than 80, (b) from about 5 to 20 parts of a semi-crystalline copolymer fraction, which copolymer is insoluble in xylene at room or ambient temperature, and (c) from 40 to 80% of a copolymer fraction of ethylene with propylene or a C 4 -C 8 alpha-olefin, and optionally with minor amounts of a diene, said copolymer fraction containing less than 40% ethylene or a C 4 -C 8 alpha-olefin or combinations thereof, being soluble in xylene at room temperature and having an intrinsic viscosity from 1.5 to 4 dl/g, wherein the total of the (b) and (c) fractions, based on the total olefin polymer composition, being from about 50% to 90%, and the weight ratio of (b)/(c) being less than 0.4.