Production of synthetic fibers

Details Production of synthetic fibers Production of synthetic fibers

1979-12-14

1985-08-06

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, D01D 506

Patent

active

045335117

ABSTRACT:
A process for the spinning of synthetic fibers comprising dissolving at least one polycondensation product of at least one polyfunctional phenol component with the phenolic groups attached to a central carbon atom so they are hindered in their free rotation and at least one polyfunctional carboxylic acid chloride having an inherent viscosity .eta. inh greater than 0.5 dl/g in a solvent with a boiling point less than 100.degree. C. to form a spinning solution, forcing the spinning solution through spinning nozzles into a liquid precipitant for fiber formation at a temperature at least 8.degree. C. less than the solvent boiling point to withdraw the majority of the solvent from the fibers, stretching the resulting fibers to 2 to 6 times their length and removing the residual solvent.

REFERENCES:
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patent: 2924501 (1960-02-01), Wagner et al.
patent: 2924502 (1960-02-01), Ucci et al.
patent: 3246067 (1966-04-01), Boyer
patent: 3351624 (1967-11-01), Conix
patent: 3388097 (1968-06-01), Cramer
patent: 3457343 (1969-07-01), Lohruizen et al.
patent: 3546165 (1970-12-01), Morgan
patent: 4208509 (1980-06-01), Wallrabenstein et al.

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