Patent ID: 6692671
Filing Date: 2004-02-17
Classification: D01F,D06M,Y10T

Abstract:
A process for producing a polyester fiber, wherein a polyester comprising 90% or more by weight of a poly(trimethylene terephthalate) is melt spun, the process comprising rapidly cooling molten filaments extruded from a spinning nozzle to be changed into solid filaments, winding the solidified filaments round a first roll heated at 30 to 80Â° C. and having a peripheral speed of 300 to 3,500 m/min without winding thereon, winding the filaments round a second roll heated at 100 to 160Â° C., whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first and the second roll having a peripheral speed higher than that of the first one, and winding the filaments on a winder having a peripheral speed lower than that of the second roll.