Abstract: A method can include (a) extruding a bi-component fiber comprising: a first component comprising a first polypropylene homopolymer; and a second component comprising a blend that comprises a propylene-based elastomer and a second polypropylene homopolymer, wherein the blend has a melt flow rate that is at least 20% greater than or at least 20% less than a melt flow rate of the first polypropylene homopolymer; (b) cooling the bi-component fiber; and (c) thermally and/or mechanically activating the bi-component fiber to cause the bi-component fiber to curl.

Abstract: A fiber or nonwoven and methods for making and using same are provided herein. The fiber or nonwoven can contain at least one primary polypropylene, at least one polyalphaolefin, and at least one propylene-based elastomer. The propylene-based elastomer can have a heat of fusion less than about 80 J/g. The propylene-based elastomer can also include greater than 50 wt % propylene and from about 3 to about 25 wt % units derived from one or more C2 or C4-C12 ?-olefins, based on a total weight of the propylene-based elastomer.