Patent ID: 8257628

Claim:
A process for making at least one multicomponent fiber having a shaped cross section comprising: (A) spinning at least one water dispersible sulfopolyester and at least one water non-dispersible polymers immiscible with said sulfopolyester to produce a multicomponent fiber, wherein said multicomponent fiber has a plurality of domains comprising said water non-dispersible polymer and said domains are substantially isolated from each other by said sulfopolyester intervening between said domains; and wherein said water dispersible sulfopolyester has a Tg of at least 40° C. and exhibits a melt viscosity of less than about 12,000 poise measured at 240° C. at a strain rate of 1 rad/sec, and wherein 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.