Title:
POLY(VINYL ALCOHOL) FILM AND METHOD FOR PRODUCING POLARIZING FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/116414
Kind Code:
A1
Abstract:
This poly(vinyl alcohol) (PVA) film contains PVA (A), a non-ionic surfactant (B) and an anionic surfactant (C), and is characterized in that the non-ionic surfactant (B) is a secondary amide type aliphatic alkanolamide represented by formula (I), the content of the non-ionic surfactant (B) is 0.01-0.12 parts by mass relative to 100 parts by mass of the PVA (A), and the content of the anionic surfactant (C) in the film is 0.01-0.24 parts by mass relative to 100 parts by mass of the PVA (A). This PVA film contains few surfactant aggregates, has a low haze value, has good film surface quality, has a high drawing ratio and exhibits good polarization performance. [In formula (I), R is an alkyl group having 8-18 carbon atoms, and the number (n) of polyoxyethylene chains is 2-10.]
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Inventors:
TAKATORI YOHEI (JP)
HAMASHIMA ISAO (JP)
NAKAI SHINJI (JP)
HAMASHIMA ISAO (JP)
NAKAI SHINJI (JP)
Application Number:
PCT/JP2019/047123
Publication Date:
June 11, 2020
Filing Date:
December 03, 2019
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
G02B5/30; C08K5/20; C08L29/04; C08L71/00
Domestic Patent References:
| WO2016060097A1 | 2016-04-21 |
Foreign References:
| CN108384163A | 2018-08-10 | |||
| JP2001145982A | 2001-05-29 | |||
| US4284534A | 1981-08-18 | |||
| JPS5255521A | 1977-05-07 | |||
| JPH09249614A | 1997-09-22 | |||
| JP2018090691A | 2018-06-14 | |||
| JP2008050574A | 2008-03-06 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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