Patent ID: 6880212

Claim:
A method for producing a composite elastic yarn, comprising: a) stretching an elastomeric yarn with one or more filaments to from 2.0 to 7.0 times its relaxed length while heating the yarn to a temperature in the range of about 80° C. to about 150° C.; b) jointly feeding the stretched elastomeric yarn and an inelastic yarn through a fluid entangling jet to entangle the elastomeric yarn and the inelastic yarn to form the composite elastic yarn, said inelastic yarn being supplied to the jet at an overfeed from 1.5% to 6.0%; c) heating the composite elastic yarn to a maximum temperature of between about 150° C. and about 240° C.; and d) cooling the heated composite yarn to an average temperature of about 60° C. or less, prior to winding the composite yarn into a package.