Process for the manufacture of fibres from poly-p-phenylene tere

Details Process for the manufacture of fibres from poly-p-phenylene tere Process for the manufacture of fibres from poly-p-phenylene tere

1980-06-02

1982-03-16

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264203, 524422, 524608, 524606, D01F 600

Patent

active

043200818

ABSTRACT:
A process for the manufacture of fibres from a polyamide entirely or substantially consisting of poly-p-phenylene terephthalamide, by spinning a spinning mass having a temperature of 20.degree.-120.degree. C. and consisting of a mixture of concentrated sulphuric acid having a strength of at least 96% by weight and, calculated on the weight of the mixture, at least 15% of polyamide having an inherent viscosity of at least 2.5, the spinning mass being downwardly extruded into a coagulation bath from a spinneret whose efflux side is positioned in a gaseous inert medium and shortly above the liquid surface of the coagulation bath. The spinning mass is prepared by the successive steps of cooling the concentrated sulphuric acid to below its solidifying point, combining the sulphuric acid thus cooled and the polyamide, intermixing the two substances into a solid state mixture and heating the resulting solid state mixture to spinning temperature.

REFERENCES:
patent: 3227792 (1966-01-01), Rosenthal et al.
patent: 3414645 (1968-12-01), Morgan
patent: 3551535 (1970-12-01), Henderson et al.
patent: 3671542 (1972-06-01), Kwolek
patent: 3684540 (1972-08-01), Henderson et al.
patent: 3767756 (1973-10-01), Blades
patent: 4018735 (1977-04-01), Nakagawa et al.
patent: 4075269 (1978-02-01), Jones et al.

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