Title:
ポリビニルアルコールフィルム及びそれを用いた偏光フィルムの製造方法
Document Type and Number:
Japanese Patent JP7165724
Kind Code:
B2
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.)
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Inventors:
Youhei Takatori
Shinji Nakai
Shinji Nakai
Application Number:
JP2020515515A
Publication Date:
November 04, 2022
Filing Date:
April 24, 2019
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08L29/04; C08J5/18; C08K5/41; C08L71/00; G02B5/30
Domestic Patent References:
| JP2005206810A | ||||
| JP2018018062A | ||||
| JP2006233179A |
Foreign References:
| WO2017217346A1 | ||||
| WO2016060097A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Setouchi International Patent Firm