Patent ID: 6123885
Filing Date: 2000-09-26
Classification: D01F,Y10T

Abstract:
In the production of elastane fibers from polyurea polyurethane by dry spinning or wet spinning, removing the spinning solvent, finishing, optionally twisting a solution thereof to form filaments winding the spun filaments, the improvement which comprises adding to the spinning solution before spinning,A) from 0.8 to 2% by weight of polydimethylsiloxane with a viscosity of 50 to 300 cSt andB) from 0.2 to 0.6% by weight of ethoxylated polydimethylsiloxane with 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, whereby fabrics formed of the resulting yarn exhibit reduced defects when dyed.