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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING PHASE DIFFERENCE LAYER-EQUIPPED POLARIZING PLATE
Document Type and Number:
WIPO Patent Application WO/2022/074872
Kind Code:
A1
Abstract:
The present invention provides, at high yield, a phase difference layer-equipped polarizing plate in which warpage is suppressed. The method for manufacturing a phase difference layer-equipped polarizing plate according to an embodiment of the present invention includes: preparing a layered body having a first protective film, a polarizing plate which includes a polarizer and a protective layer positioned on at least one side of the polarizer, a phase difference layer, and a second protective film in this order, the total of the thickness of the polarizing plate and the thickness of the phase difference layer being 50 µm or less, and the ratio of the thickness of the polarizing plate to the thickness of the phase difference layer being 5 or greater; and placing the layered body in an environment having a water vapor content of 10.5 g/m3 or greater in a state in which the layered body is mounted on a mounting surface, to perform a humidification treatment, the layered body being mounted in a state in which the main surface of the layered body is at an angle relative to the mounting surface.

Inventors:
KOJIMA TADASHI (JP)
MASUNAGA NORIAKI (JP)
NAMBARA TAKUYA (JP)
Application Number:
PCT/JP2021/019736
Publication Date:
April 14, 2022
Filing Date:
May 25, 2021
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02F1/1335
Domestic Patent References:
WO2019022156A12019-01-31
WO2017111048A12017-06-29
Foreign References:
JP2010134440A2010-06-17
JP2006048007A2006-02-16
JP2004093993A2004-03-25
JP2019069865A2019-05-09
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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