Melt spinning of ultra-oriented crystalline filaments

Details Melt spinning of ultra-oriented crystalline filaments Melt spinning of ultra-oriented crystalline filaments

1992-02-04

1993-12-07

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264181, 2642108, 26421117, D01D 508, D01D 512, D01F 662

Patent

active

052681335

ABSTRACT:
Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polyethylene terephthalate filaments so produced at 3000-5000 m/min exhibit a crystalline structure and possess birefringence of 0.20-0.22, tenacity of 7-9 g/d, break elongation of 14-30% and boil-off shrinkage of 5-10%.

REFERENCES:
patent: 3002804 (1961-10-01), Kilian
patent: 4134882 (1979-01-01), Frankfort et al.
patent: 4425293 (1984-01-01), Vassilatos
patent: 4446299 (1984-05-01), Koschinek et al.
patent: 4909976 (1990-03-01), Cuculo et al.
T. Kawaguchi, Industrial Aspects of High-Speed Spinning, Chapter 3, "Industrial View on High-Speed Spinning", pp. 8-15 (1985).

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