Process for preparing poly(trimethylene terephthalate) carpet ya

Details Process for preparing poly(trimethylene terephthalate) carpet ya Process for preparing poly(trimethylene terephthalate) carpet ya

1997-11-13

2000-09-05

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

28271, 2642107, 2642108, 26421112, 26421114, D01D 516, D01F 662, D02G 302

Patent

active

061138258

ABSTRACT:
Poly(trimethylene terephthalate) is formed into a bulk continuous filament yarn by melt-spinning poly(trimethylene terephthalate) at a temperature of 240 to 280.degree. C. to produce a plurality of spun filaments, cooling the spun filaments, converging the spun filaments into a yarn, drawing the yarn at a first draw ratio of 1.01 to about 2 in a first drawing stage defined by at least one feed roller and at least one first draw roller wherein at least one feed roller is operated at less than 100.degree. C. and each of the draw rollers is heated to a temperature greater than that of the feed roller and between 50 and 150.degree. C., subsequently drawing the yarn at a second draw ratio of at least about 2.2 times that of the first draw ratio in the second drawing stage defined by at least one first draw roller and at least one second draw roller, wherein at least one second draw roller is heated to a temperature greater than that of the first draw roller and within the range of 100 to 200.degree. C., and texturing the drawn yarn and cooling the textured filaments.

REFERENCES:
patent: 3998042 (1976-12-01), Reese
patent: 4195052 (1980-03-01), Davis et al.
patent: 4877572 (1989-10-01), Clarke et al.
patent: 5645782 (1997-07-01), Howell et al.
patent: 5662980 (1997-09-01), Howell et al.

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