Processes for the production of dry-spun polyacrylonitrile profi

Details Processes for the production of dry-spun polyacrylonitrile profi Processes for the production of dry-spun polyacrylonitrile profi

1987-04-22

1989-03-07

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2641772, 264206, 26421114, 26421117, D01F 618, D01D 504

Patent

active

048104485

ABSTRACT:
A process for the production of acrylonitrile fibers and filaments having a precise cross-sectional profile in which filament-forming synthetic polymers are dry-spun from a solution having a viscosity of at least 120 falling bass seconds, measured at 80.degree. C., or a viscosity of at least 75 falling ball seconds, measured at 100.degree. C. Such solution is dry-spun through one or more nozzles. The nozzle hole are of the profile nozzles being less than 0.2 mm.sup.2 and the lateral width being less than 0.17 mm.

REFERENCES:
patent: 2843449 (1958-07-01), Raynolds
patent: 3131428 (1964-05-01), Mika
patent: 3194002 (1965-07-01), Raynolds et al.
patent: 3340571 (1967-09-01), Bishop et al.
patent: 3579625 (1971-05-01), Jacquinet
patent: 4336214 (1982-06-01), Reinehr
"Synthesefasein", Belavon Falkai, Verlog Chemie, Weinhum 1981 pp. 198 & 208.
"Polymer Process", Schildknecht, Interscience Publishers, 1956, pp. 843-844.

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