Title: Process for preparing fibrous polyvinyl alcohol

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.

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Inventors: Shiraishi, Makoto (Toyama, JA)
Iwata, Sigetaka (Toyama, JA)
Oura, Masao (Toyama, JA)

Application Number: 378213
Filing Date: 1973-07-11
Publication_date: 1976-01-13
Assignee: Kuraray Co., Ltd. (Kurashiki, JA)
Primary Class(es): 264/147 264/185, 264/210.7, 264/290.5, 264/DIG47
Other Classes:
US Patent Ref:

3135813	Jun, 1964	Speakman	264/147.
3264384	Aug, 1966	Settele	264/209.
3562369	Feb, 1971	Chopra et al.	264/210.
3608042	Sep, 1971	Rasmussen	264/210.
3641760	Feb, 1972	Keuchel	264/147.
3645085	Feb, 1972	Rassart	264/210.
3847845	Nov, 1974	Tada et al.	264/185.

Other Refs: 35-15014

Oct, 1960	JA

Primary Examiner: Woo, Jay H.
Assistant Examiner:
Attorney: Bacon & Thomas