Title:
ポリビニルアルコール系フィルム、およびそれを用いてなる偏光膜
Document Type and Number:
Japanese Patent JP6642434
Kind Code:
B2
Abstract:
The present invention is a polyvinyl alcohol film having a film surface hardness of 65-90 MPa when a nanoindentation test is conducted under conditions (1)-(3) below in accordance with ISO 14577:2002. A polyvinyl alcohol film that makes it possible to obtain a polarizing film devoid of display defects and color unevenness is accordingly obtained. Condition (1) Measurement environment: 25°C, 50% RH. Condition (2) Indenter: Berkovich type (triangular cone type, vertical angle: 65°, ε=0.75, made of diamond). Condition (3) Maximum indentation depth: 500 nm.
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Inventors:
Daiki Toyota
Seiichiro Hayakawa
Seiichiro Hayakawa
Application Number:
JP2016542789A
Publication Date:
February 05, 2020
Filing Date:
June 23, 2016
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C08J5/18; G01N3/42; G02B5/30
Domestic Patent References:
| JP200131877A | ||||
| JP5245858A | ||||
| JP200420636A | ||||
| JP2004106376A |
Foreign References:
| WO2017006769A1 | ||||
| WO2012132984A1 |
Attorney, Agent or Firm:
Masahiko Nishito
Iisaki Aika
Yuko Saito
Iisaki Aika
Yuko Saito