Process for preparing fibrous polyvinyl alcohol

Details Process for preparing fibrous polyvinyl alcohol Process for preparing fibrous polyvinyl alcohol

1973-07-11

1976-01-13

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264185, 264210R, 264DIG47, D01F 614, B29H 718

Patent

active

039325741

ABSTRACT:
Shaped articles of polyvinyl alcohol are prepared by saponifying a liquid feed of polyvinyl ester as it cascades downwardly along the walls of a cylindrical reactor, and by taking-up from the reactor outlet the fibrous, shaped article of oriented, solid polyvinyl alcohol thus formed at a rate of at least 50 cm/minute. Advantageously, the thus formed shaped article is next divided into sliver, stretched and cut into fibers and, optionally, beaten, which fibers are useful in the manufacture of paper-like sheet materials.

REFERENCES:
patent: 3135813 (1964-06-01), Speakman
patent: 3264384 (1966-08-01), Settele
patent: 3562369 (1971-02-01), Chopra et al.
patent: 3608042 (1971-09-01), Rasmussen
patent: 3641760 (1972-02-01), Keuchel
patent: 3645085 (1972-02-01), Rassart
patent: 3847845 (1974-11-01), Tada et al.

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