Title:
METHOD FOR PRODUCING PHASE DIFFERENCE LAYER-EQUIPPED POLARIZING PLATE
Document Type and Number:
WIPO Patent Application WO/2022/102166
Kind Code:
A1
Abstract:
Provided is a simple and efficient method for producing a phase difference layer-equipped polarizing plate in which warp is suppressed. Through an embodiment of the present invention, there is provided a method for producing a phase difference layer-equipped polarizing plate having a polarizer, a protective layer positioned on one side of the polarizer, and a phase difference layer positioned on the other side of the polarizer. This production method includes: humidifying an intermediate layered body in which a water-absorbent film is temporarily adhered to the phase difference layer side of the phase difference layer-equipped polarizing plate, while roll-conveying the intermediate body; and storing the humidified intermediate layered body for at least 12 hours, the moisture permeability of the protective layer at 40°C and 92% RH being 100 g/m2∙24 h or less, and the phase difference layer being an aligned solidified layer of a liquid crystal compound.
Inventors:
NAMBARA TAKUYA (JP)
KOJIMA TADASHI (JP)
GOTO SHUSAKU (JP)
KOJIMA TADASHI (JP)
GOTO SHUSAKU (JP)
Application Number:
PCT/JP2021/025057
Publication Date:
May 19, 2022
Filing Date:
July 02, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B32B7/023; B32B38/18
Domestic Patent References:
| WO2019167926A1 | 2019-09-06 |
Foreign References:
| JP2018205663A | 2018-12-27 | |||
| JP2009258570A | 2009-11-05 | |||
| JP2020024352A | 2020-02-13 | |||
| JP2008015145A | 2008-01-24 | |||
| JP2009086047A | 2009-04-23 | |||
| JP2020095255A | 2020-06-18 | |||
| JP2020134934A | 2020-08-31 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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