Patent ID: 6623853
Filing Date: 2003-09-23
Classification: C08G,C08L,D01F,D03D,D10B,Y10T

Abstract:
A polyethylene glycol modified copolyester fiber that can be formed into exceptionally comfortable fabrics, comprising;polyethylene terephthalate in an amount sufficient for said copolyester fiber to possess dimensional stability properties substantially similar to those of conventional, unmodified polyethylene terephthalate fibers; polyethylene glycol in an amount sufficient for said copolyester fiber to possess wicking properties that are superior to those of conventional, unmodified polyethylene terephthalate fibers, wherein the polyethylene glycol has an average molecular weight of less than about 5000 g/mol; and chain branching agent in an amount between about 0.0014 and about 0.0113 mole-equivalent branches per mole of standardized polymer, the standardized polymer being unmodified polyethylene terephthalate; and wherein said copolyester fiber has a zero-shear melt viscosity of between about 1000 and about 3500 poise when heated to 260Â° C.