Method of making polyester fibers

Details Method of making polyester fibers Method of making polyester fibers

1990-03-27

1991-11-19

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

264130, 2642107, 2642108, 26421115, 26421117, D01D 512

Patent

active

050664395

ABSTRACT:
A continuous spin-draw process of making dimensionally stable polyester fiber having high strength and low shrinkage by melt spinning polyethylene terephthalate and drawing comprising multiple drawing stages of at least two stages where the spun yarn is passed from the takeup roller to a first pair of drawing rollers, then to a final pair of drawing rollers, then to a pair of relaxation rollers and then to yarn take up means; the surface temperature of said final pair of drawing rollers being maintained at 10.degree. to 60.degree. C. lower than the melting point of the drawn fiber; a non-contct type heated plate whose surface temperture is heated to 250.degree. to 500.degree. C. is positioned 20 to 100 mm separated from the yarn, thereby heating the yarn to obtain the relaxation heat treatment; and applying a commingling treatment to the drawn fiber by installing a commingling treatment apparatus between the final pair of drawing rollers and the pair of relaxation rollers.

REFERENCES:
patent: 3739056 (1973-06-01), Evans et al.
patent: 3966867 (1976-06-01), Munting
patent: 4003974 (1977-01-01), Chantry et al.
patent: 4414169 (1983-11-01), McClary
patent: 4491657 (1985-01-01), Saito et al.

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