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Title:
POLYVINYL ALCOHOL FILM AND METHOD FOR PRODUCING POLARIZING FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/208618
Kind Code:
A1
Abstract:
A polyvinyl alcohol film which contains (A) a polyvinyl alcohol, (B) an amine surfactant represented by formula (I), and (C) at least one surfactant selected from among sulfuric acid ester salt surfactants and sulfonic acid salt surfactants, and which is characterized in that: the content of the surfactant (B) is 0.03-0.18 part by weight relative to 100 parts by mass of the polyvinyl alcohol (A); and the content of the surfactant (C) is 0.04-0.4 part by weight relative to 100 parts by mass of the polyvinyl alcohol (A). Consequently, the present invention provides: a PVA film which is suppressed in the number of surfactant aggregates, while having low Haze value, good releasability and good film surface quality; and a method for producing a polarizing film, which uses this PVA film. (In formula (I), R represents a linear alkyl group having 10-16 carbon atoms; and the number of polyoxyethylene chains (m + n) is 14-22.)

Inventors:
TAKATORI YOHEI (JP)
NAKAI SHINJI (JP)
Application Number:
JP2019/017371
Publication Date:
October 31, 2019
Filing Date:
April 24, 2019
Export Citation:
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Assignee:
KURARAY CO (〒7100801, JP)
International Classes:
C08L29/04; C08J5/18; C08L71/00; G02B5/30; C08G65/26; C08G65/326
Domestic Patent References:
WO2017217346A12017-12-21
WO2016060097A12016-04-21
Foreign References:
JP2005206810A2005-08-04
JP2018018062A2018-02-01
JP2006233179A2006-09-07
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (〒7000975, JP)
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