PRODUCTION OF HIGH-TENACITY POLYVINYL ALCOHOL FIBER

PURPOSE:To readily obtain the subject fiber at a low cost by bringing a polymerization reaction solution containing an unreacted vinyl ester into contact with a specific solvent, removing the aforementioned vinyl ester, saponifying the polyvinyl ester and then spinning the resultant polyvinyl alcoho...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAHARA FUMIO, FUJIWARA NAOKI, KOWAKA TAKESHI, MIYAZAKI HIROTOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	PURPOSE:To readily obtain the subject fiber at a low cost by bringing a polymerization reaction solution containing an unreacted vinyl ester into contact with a specific solvent, removing the aforementioned vinyl ester, saponifying the polyvinyl ester and then spinning the resultant polyvinyl alcohol solution. CONSTITUTION:Vinyl acetate is preferably subjected to emulsion polymerization, etc., to provide a polyvinyl ester solution, containing the unreacted vinyl ester and having >=1.4dl/g intrinsic viscosity. The above-mentioned solution is subsequently brought into contact with at least one solvent selected from among dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, 1-10C diamine compounds and 1-10C triamine compounds to reduce the content of the unreacted vinyl ester to preferably