Single stage process for producing continuous polyester-based mu

Details Single stage process for producing continuous polyester-based mu Single stage process for producing continuous polyester-based mu

1986-12-22

1989-08-08

Lorin, Hubert

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

264130, 264129, 2642108, 26421115, D01D 5092, D01F 662

Patent

active

048550990

ABSTRACT:
A method of producing continuous multifilament yarns of polyethylene terephthalate comprising the steps of extruding the polymer in the molten state, cooling the filaments by blowing, and application of dressing, interlacing and winding. The polymer viscosity is in the range of 0.52 to 0.82. The filaments, on exiting the die, meet a conduit which protects them against air streams. Winding is carried out at rates in the range of 3,500 to 5,500 meters/minute. The fiber yielded by the method has a modulus in the 300 to 500 cN/tex range, tenacity in the range of 30 to 40 cN/tex, ultimate elongation varying from 50% to 80%, and shrinkage in water of between 3% and 8%.

REFERENCES:
patent: 2604667 (1952-07-01), Hebeler
patent: 3996324 (1976-12-01), Landenberger et al.
patent: 4237187 (1980-12-01), Raybon, Jr. et al.

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