METHOD FOR MANUFACTURING POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN FOR POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN SOLUTION FOR POLARIZING FILM, POLARIZING FILM, AND POLARIZING PLATE

Title:

METHOD FOR MANUFACTURING POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN FOR POLARIZING FILM, POLY(VINYL ALCOHOL)-BASED RESIN SOLUTION FOR POLARIZING FILM, POLARIZING FILM, AND POLARIZING PLATE

Document Type and Number:

WIPO Patent Application WO/2012/118185

Kind Code:

A1

Abstract:

Provided is a method for manufacturing a polarizing film, and a poly(vinyl alcohol)-based resin for the polarizing film that allow the dyeing time to be reduced and the productivity of a polarizing film having minimal dyeing nonuniformities to be markedly reduced. This method for manufacturing a polarizing film comprises: a step for preparing a poly(vinyl alcohol)-based resin film formed by using a poly(vinyl alcohol)-based resin having a degree of saponification of 94-98.5 mol% and a degree of polymerization of 2500-3000, as calculated according to JIS K 6726; and a step for obtaining a polarizing film by using the poly(vinyl alcohol)-based resin film. This poly(vinyl alcohol)-based resin for the polarizing film has a degree of saponification of 94-98.5 mol% and a degree of polymerization of 2500-3000, as measured according to JIS K 6726.

Inventors:

SHOUHI HAJIME (JP)
NAKATA MASAKAZU (JP)

Application Number:

PCT/JP2012/055397

Publication Date:

September 07, 2012

Filing Date:

March 02, 2012

Export Citation:

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Assignee:

SEKISUI CHEMICAL CO LTD (JP)
SHOUHI HAJIME (JP)
NAKATA MASAKAZU (JP)

International Classes:

G02B5/30

Foreign References:

JPS58111002A	1983-07-01
JPH07306316A	1995-11-21
JP2011227450A	2011-11-10
JP2007140127A	2007-06-07

Other References: