D - Textiles – Paper – 02 – G
Patent
D - Textiles, Paper
02
G
28/34
D02G 3/00 (2006.01) D02G 1/16 (2006.01)
Patent
CA 1148728
ABSTRACT OF THE DISCLOSURE A process is disclosed for producing an air jet textured polyester yarn having a low dry heat shrinkage. The process comprises the steps of: (a) cold drawing a spin-oriented polyester yarn at a draw ratio of from 1.3 to 2.0; (b) preheating the drawn yarn at substantially constant length; (c) feeding the yarn to an air jet at a 10% to 40% overfeed; (d) jet-texturing the yarn with the air jet; (e) drawing the jet-textured yarn at a draw ratio of 1.04 to 1.12; and (f) winding up the resulting air jet-textured yarn. In an embodiment of the process a step of post- heating the jet-textured yarn is included between step (e) and step (f) in order to reduce the size of the surface loops and to improve the stability of the jet-textured yarn.
367513
Du Pont Canada Inc.
Mccallum Brooks & Co.
LandOfFree
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