Process for preparing polyvinyl alcohol yarn

Details Process for preparing polyvinyl alcohol yarn Process for preparing polyvinyl alcohol yarn

1988-08-31

1990-05-22

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 26421114, D01F 614

Patent

active

049275860

ABSTRACT:
In a process for preparing a polyvinyl alcohol yarn of high tenacity, a solution of polyvinyl alcohol in an organic solvent is extruded from a spinneret into a coagulation bath through an air gap or inert gas gap, and the extruded solution is drawn. The spinneret has capillaries which are at least five times their diameter in length and the concentration of the polyvinyl solution is at least 30-(M.sub.v /20,000) in percent by weight of the polyvinyl alcohol solution.

REFERENCES:
patent: 2322976 (1943-06-01), Schmitz
patent: 2447140 (1948-08-01), Shelton et al.
patent: 3066999 (1962-12-01), Nakajo et al.
patent: 3278282 (1966-10-01), Jaray
patent: 4698194 (1987-10-01), Tanaka et al.

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