Patent ID: 9689098
Date: 2017-06-27
CPC Classifications: C08L,D01D,D01F,D04H,Y10T

Claim:
1. A method of producing a spunbond nonwoven fabric, the method comprising: annealing a spunbond nonwoven fabric comprising (I) a crystalline resin composition, wherein the crystalline resin composition (I) comprises (a) a low crystalline olefin polymer having an elastic modulus of 10 to 450 MPa and a melting point Tm of 20 to 100° C. in a content of 1 to 40% by mass, (b) a high crystalline olefin polymer having an elastic modulus of 500 to 2,000 MPa, the content of the component (b) being the rest, and (c) an additive in a content of 1 to 20,000 ppm by mass, wherein the low crystalline olefin polymer (a) comprises, in reacted form, one or more monomers selected from the group consisting of (i) ethylene and (ii) an α-olefin having 3 to 6 carbon atoms, and wherein the high crystalline olefin polymer (b) is a propylene homopolymer, a propylene-ethylene random copolymer, a propylene-ethylene-1-butene random copolymer, or a propylene-ethylene block copolymer.