Patent ID: 7033530
Filing Date: 2006-04-25
Classification: D01F,Y10T

Abstract:
1. A process for preparing poly(trimethylene terephthalate) side-by-side or eccentric sheath-core bicomponent fibers comprising (a) providing two different poly(trimethylene terephthalate)s differing in intrinsic viscosity (IV) by about 0.03 to about 0.5 dl/g, at least one of which contains about 0.1 to about 10 weight % styrene polymer, by weight of the polymers, and (b) spinning the poly(trimethylene terephthalate)s to form side-by-side or eccentric sheath-core bicomponent fibers where at least one of the component comprises the styrene polymer dispersed throughout the poly(trimethylene terephthalate).