Spinning of polypyrrolidone

Details Spinning of polypyrrolidone Spinning of polypyrrolidone

1976-08-16

1978-06-13

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

260 338R, 260 78P, 264203, 264205, D01F 600

Patent

active

040949451

ABSTRACT:
Polypyrrolidone solutions having a bulk viscosity of 100-10,000 poises, and containing a solvent such as formic acid and a volatile diluent such as methylene chloride, are spun into filaments by extrusion through a spinneret. The solution contains, for example, about 5-40 weight percent of polypyrrolidone, about 30-90 weight percent of formic acid and about 5-60 weight percent of methylene chloride.

REFERENCES:
patent: 2216835 (1940-10-01), Carothers
patent: 2374126 (1945-04-01), Peters
patent: 2711398 (1955-06-01), Barnes
patent: 2919257 (1959-12-01), Blake et al.
patent: 3003985 (1961-10-01), Black
patent: 3042647 (1962-07-01), Black
patent: 3070562 (1962-12-01), Koller
patent: 3117941 (1964-01-01), Knobloch et al.
patent: 3143527 (1964-08-01), Wittbecker

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