Patent ID: 6284371
Filing Date: 2001-09-04
Classification: D01F,Y10T

Abstract:
A yarn formed of elastane fibers produced from polyurea polyurethane by dry spinning or wet spinning to form filaments, removing the spinning solvent, finishing, optionally twisting to form filaments, and winding the spun filaments, whereinA) from 0.8 to 2% by weight of polydimethylsiloxane having a viscosity of 50 to 300 cSt andB) from 0.2 to 0.6% by weight of ethoxylated polydimethylsiloxane having a viscosity of 20 to 150 cSt(Viscosities measured with a falling ball viscosimeter at 25.degree. C.) the percentages being based on the siloxane content of the final fiber, are added to the spinning solutions before spinning.