Title:
POLYVINYL ALCOHOL FILM, AND METHOD FOR PRODUCING POLARIZING FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/256052
Kind Code:
A1
Abstract:
A PVA film containing PVA (A), a nonionic surfactant (B), and at least one surfactant (C) selected from formula (I) or (II), wherein the PVA film is characterized in that the content of the surfactant (B) is 0.04-0.4 mass parts per 100 mass parts of PVA (A) and the content of the surfactant (C) is 0.04-0.4 mass parts per 100 mass parts of PVA (A). The PVA film of the present invention has few activator aggregates and optical defects, a low haze value, and excellent peelability. [In formula (I), R1 is a C8-15 alkyl group, the polyoxyethylene chain number (n) is 3-8, and M is an alkali metal or an amine.] [In formula (II), R2 and R3 each independently are a C8-15 alkyl group, the polyoxyethylene chain number (n+m) is 3-8, and M is an alkali metal or an amine.]
Inventors:
TAKATORI YOHEI (JP)
NAKAI SHINJI (JP)
NAKAI SHINJI (JP)
Application Number:
PCT/JP2020/023913
Publication Date:
December 24, 2020
Filing Date:
June 18, 2020
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08L29/04; C08J5/18; C08K5/06; C08K5/20; C08K5/521; G02B5/30
Domestic Patent References:
| WO2019124310A1 | 2019-06-27 |
Foreign References:
| JP2018090691A | 2018-06-14 | |||
| JP2011144221A | 2011-07-28 | |||
| JP2004263157A | 2004-09-24 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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