POLYOLEFIN ELASTIC FIBER

1 . An article comprising a yarn comprising an elastomeric propylene-based polymer composition; said polymer composition comprising at least one elastomeric propylene-based polymer, wherein said yarn has break elongation of greater than 200%.

2 . The article of claim 1 , wherein said elastomeric propylene-based polymer comprises a diene.

3 . The article of claim 1 , wherein said elastomeric propylene-based polymer composition comprises a crosslinking agent.

4 . The article of claim 1 , wherein said elastomeric propylene-based polymer comprises a blend of two or more elastomeric propylene-based polymers.

5 . The article of claim 1 , wherein said yarn comprises a number of filaments, wherein the number is one to about eighty.

6 . The article of claim 1 , wherein said yarn comprises a denier of about 10 to about 300.

7 . The article of claim 3 , wherein said yarn is crosslinked.

8 . The article of claim 1 , wherein said yarn has an elongation of 200% to about 600%.

9 . A method for preparing an elastomeric propylene-based polymer yarn comprising:

(a) providing an elastomeric propylene-based polymer composition;

(b) heating said elastomeric propylene-based polymer composition to a temperature of about 220° C. to about 300° C.;

(c) extruding said composition through a capillary to form a yarn; and

(d) winding said yarn onto a package.

10 . The method of claim 9 , wherein said winding speed is greater than about 400 m/min.

11 . The method of claim 9 , wherein said winding speed is greater than about 425 m/min.

12 . The method of claim 9 , wherein said winding speed is greater than about 500 m/min.

13 . The method of claim 9 , further comprising:

(e) crosslinking said yarn.

14 . The method of claim 13 , wherein the crosslinking is effected either before winding said yarn onto a package or after winding said yarn onto a package.