Patent ID: 7687143
Filing Date: 2010-03-30
Classification: D01F,Y10T

Abstract:
1. A multicomponent fiber having a shaped cross section, said multicomponent fiber comprising: (A) at least one water dispersible sulfopolyester; and (B) a plurality of domains comprising one or more water non-dispersible polymers immiscible with said sulfopolyester, wherein said domains are substantially isolated from each other by said sulfopolyester intervening between said domains, wherein said fiber has an as-spun denier of less than about 6 denier per filament; wherein said water dispersible sulfopolyester exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, said sulfopolyester comprising less than about 25 mole % of residues of at least one sulfomonomer, based on the total moles of diacid or diol residues; and wherein said water non-dispersible polymer is poly(ethylene) terephthalate having an inherent viscosity of less than 0.6 dL/g.