Improved acrylonitrile polymer spinning process

Details Improved acrylonitrile polymer spinning process Improved acrylonitrile polymer spinning process

1976-06-04

1978-06-13

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

260 296AN, 264211, D01F 618

Patent

active

040949486

ABSTRACT:
Substantially single-phase compositions which are substantially partial or complete hydrates of an acrylonitrile polymer containing at least 40% acrylonitrile units can be shaped into filaments and films. The nitrile groups of the polymer are hydrated to a selected extent depending on the particular polymer used. Hydration occurs only within a certain elevated temperature range and under at least autogenous pressure. Also disclosed are films and filaments having novel structural features which are spun from the substantially single-phase compositions comprising polymers or copolymers of 80% or more acrylonitrile. The filaments are characterized by a sheath which has a density gradient in which the density increases toward the surface and, after drawing, by a unique luster source ratio related to reflective interfaces. Many of the filaments have surface striations and an optically microvoided core. The filaments contribute good hand and good water absorption properties to fabrics made therefrom.

REFERENCES:
patent: 2585444 (1952-02-01), Coxe
patent: 3309734 (1967-03-01), Bynum et al.
patent: 3770856 (1973-11-01), Ueki et al.
patent: 3774387 (1973-11-01), Woodell
patent: 3873508 (1975-03-01), Turner
patent: 3896204 (1975-07-01), Goodman et al.
patent: 3991153 (1976-11-01), Klausner et al.

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