Process for manufacturing an elastic bulk yarn
AssigneeRhone-Poulenc Viscosuisse SA
InventorsRemy Humbrecht, Wolfgang Morgenstern
Life of this patent
Estimating the term…
Abstract
A friction-textured elastic yarn is prepared by twisting a single-component multifilament melt-spinnable polymer yarn having an initial modulus of 80 to 150 cN/tex and a melting point of at least 200.degree. C. at a speed of at least 200 m/min, the thus twisted yarn is heat-set at 160.degree. to 190.degree. C. to produce a fixated yarn, and the fixated yarn is friction-textured at a pretension of 0.5 to 3.0 cN/tex.
Claims1
The method of manufacturing a friction-textured elastic yarn, which comprises twisting a single-component multifilament melt-spinnable polymer yarn selected from the group consisting of polyester, polyether ester, polyether ester amide and polyether amide yarns having an initial modulus of 80 to 150 cN/tex and a melting point of at least 200.degree. C. at a speed of at least 200 m/min, heat-setting the twisted yarn at 160.degree. to 190.degree. C. to produce a fixated yarn, and friction-texturing said fixated yarn while at the same time subjecting said fixated yarn to a pretension of 0.5 to 3.0 cN/tex.
Dependencies are inferred from the claim text.