Title:
PRODUCTION OF HOT WATER-RESISTANT POLYVINYL ALCOHOL FIBER
Document Type and Number:
Japanese Patent JPH07258910
Kind Code:
A
Abstract:
PURPOSE: To provide a method for industrially producing polyvinyl alcohol(PVA) having high strength and excellent hot water resistance in good productivity.
CONSTITUTION: In producing a hot water-resistant PVA fiber by thermally drawing PVA undrawn fiber in a multistage of two or more stages, and then, subjecting the drawn fiber to heat treatment, (1) heat treatment is applied to a PVA fiber to which a catalyst promoting dehydration reaction has added thereto, (2) two or more heating rollers are used as heat treating devices and each roller surface temperature is set to 100-300°C and ≤10.0% relax is applied to the yarn between heating rollers and (3) final winding rate is set to 100-600m/min.
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Inventors:
AKIYAMA YOSHIHIRO
NAGATA NAOHIKO
MURAKAMI SHIRO
NAGATOMI KAZUYA
ICHINOSE NAOJI
TAKAGI SHINYA
NAGATA NAOHIKO
MURAKAMI SHIRO
NAGATOMI KAZUYA
ICHINOSE NAOJI
TAKAGI SHINYA
Application Number:
JP7391794A
Publication Date:
October 09, 1995
Filing Date:
March 18, 1994
Export Citation:
Assignee:
UNITIKA LTD
International Classes:
D01F6/14; D02J1/22; (IPC1-7): D01F6/14; D02J1/22