Patent ID: 6276121
Filing Date: 2001-08-21
Classification: D01F,D02G,D02J,D04B

Abstract:
A self-crimping yarn comprising crimp-forming conjugate multifilaments wherein said crimp-forming conjugate multifilaments comprise at least two polyester polymer components having different heat shrinking properties, and said polyester polymer components are adhered in parallel with each other or in a core-sheath configuration, said self-crimping yarn having latent ability to develop additional crimps by making use of said different heat shrinkage properties, and wherein said self-crimping yarn having existing crimps (a) is able to make additional crimps (b) according to the following equations:(a) 2.5 crests/cm.ltoreq.number of crimps (CA).ltoreq.10 crests/cm, and(b) 8 crests/cm.ltoreq.number of additionally developed crimps (CB).ltoreq.30 crests/cm.