US 7,485,364 B2
	Polyurethane elastic fiber and process for producing same
Taro Yamamoto, Moriyama (Japan); and Masanori Doi, Moriyama (Japan)
Assigned to Asahi Kasei Fibers Corporation, Osaka (Japan)
Appl. No. 10/591,671 PCT Filed Feb. 28, 2005, PCT No. PCT/JP2005/003334 § 371(c)(1), (2), (4) Date Sep. 01, 2006, PCT Pub. No. WO2005/083163, PCT Pub. Date Sep. 09, 2005.
Claims priority of application No. 2004-057415 (JP), filed on Mar. 02, 2004.
Prior Publication US 2007/0196650 A1, Aug. 23, 2007
Int. Cl. D02G 3/00 (2006.01)

U.S. Cl. 428—372  [51/298; 385/143]

11 Claims

1. A polyurethane elastic fiber containing inorganic compound particles that have an average particle size of 0.5 to 5 μm, and that show a refractive index of 1.4 to 1.6, and having at least one protruded portion that has a maximum width of 0.5 to 5 μm in the fiber surface, per 120-μm length in the fiber axis direction.