Process for the production of textured yarn false extra fine polyester yarn twist texturing and false twist polyester extra fine.

摘要

A process for producing a textured yarn fine false twist polyester yarn comprising subjecting thin polyester multifilament having a single filament fineness of 0.9 dtex or less of a total number of individual filaments 100 to 400 and birefringence of 0.03 to 0.06 at false twist texturing, the method comprising: (1) subjecting the interlacing multifilament yarn to air in order to provide a degree of interlacing of 50 to 90 points interlaced / m measured for yarn false twist texturing, (2) regulate the residence time in a heated draw-false twist to 0.052 to 0.300 seconds and the temperature of filament yarn moving the heater outlet to a temperature higher than the temperature glass transition temperature (Tg) of the polyester polymer at 90 to 140C and subjecting the yarn to multi-filament texturing stretch false twist to a simultaneous a draw ratio of 1.40 to 1.70 times and provide false twist textured yarn, (3) applying a finishing oil in an amount of 1.3 to 3.0% by weight based on the weight of yarn false twist texturing, and (4) winding the resultant yarn under a winding tension of 0.05 to 0.30 cN / dtex at a speed of 500 to 1200 m / min.