Process for producing polyester fibers

Details Process for producing polyester fibers Process for producing polyester fibers

1989-01-10

1990-04-17

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642107, 2642108, 26421116, 264236, 264347, D01F 1108

Patent

active

049178482

ABSTRACT:
Process for producing polyester fibers of high tenacity and high modulus, by melt-spinning a polyester having an intrinsic viscosity of not lower than 0.3, to obtain extruded filaments of low orientation having a birefringence not higher than 10.0.times.10.sup.-3, post-polymerizing the filaments in a heating medium, and subjecting the filaments to multi-stage drawing in at least two stages.

REFERENCES:
patent: 2935372 (1960-05-01), Steuber
patent: 3840632 (1974-10-01), Maxion et al.
Sen-I-Gakkaishi, vol. 35, No. 8 (1979), pp. 46-50, Kiyotsukuri and Ohigashi, "Structure and Properties of Polyethylene Terephthalate Fiber Post-Polymerized by Heat-Treatment".

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