Patent ID: 6477828
Filing Date: 2002-11-12
Classification: D02G

Abstract:
A method of false twist texturing a synthetic yarn comprising the steps of:delivering the yarn at a speed w1.1 and under an absolute yarn tension F1 not greater than about 5 cN, to a heated draw pin in a draw zone; drawing the yarn by looping it about the draw pin at a looping angle &agr;<270Â°, and withdrawing the yarn under a tension F2, which is greater than the yarn tension F1 upstream of the draw pin; advancing the yarn into a false twist zone at an advancing speed w1, which is greater than the withdrawal speed w1.1; heating the yarn with a false twist to a temperature T>180Â° C., and subsequently cooling the yarn with a false twist within the false twist zone; guiding the yarn through a false twist unit at the downstream end of the false twist zone and so as to impart a false twist to the yarn in the false twist zone; withdrawing the yarn from the false twist zone at a withdrawal speed w2 so as to impart a subsequent drawing to the yarn in the false twist zone; and winding the yarn to a package.