Title:
POLARIZING PLATE AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/075145
Kind Code:
A1
Abstract:
The present invention provides a polarizing plate with which decreases in transmittance in high temperature environments can be suppressed. A polarizing plate comprising a polarizing element that is obtained by having a dichroic pigment adsorbed and aligned on a polyvinyl alcohol resin layer, and a transparent protective film that is laminated on at least one surface of the polarizing element, wherein: the polarizing element and the transparent protective film are adhered to each other by an adhesive agent layer formed from an adhesive agent containing a urea compound and a reducing agent; the urea compound is at least one substance selected from the group consisting of urea, urea derivatives, thiourea and thiourea derivatives; and the content ratio of the polarizing element is no less than the equilibrium moisture content at a temperature of 20°C and a relative humidity of 30%, and no more than the equilibrium moisture content at a temperature of 20°C and a relative humidity of 50%.
Inventors:
FUKUDA KENICHI (JP)
NAITOU RYO (JP)
NAITOU RYO (JP)
Application Number:
PCT/JP2021/035862
Publication Date:
April 14, 2022
Filing Date:
September 29, 2021
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; B32B27/32; C09J7/30; C09J11/06; C09J129/04; C09J201/00; G02F1/1335; G06F3/041; G09F9/00; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
WO2011114871A1 | 2011-09-22 | |||
WO2021095541A1 | 2021-05-20 |
Foreign References:
JP2013231938A | 2013-11-14 | |||
JP2003315537A | 2003-11-06 | |||
JPH0364703A | 1991-03-20 | |||
JP2014186312A | 2014-10-02 | |||
JP2012108452A | 2012-06-07 | |||
JP2005326531A | 2005-11-24 | |||
JP2014102353A | 2014-06-05 | |||
JP2015180921A | 2015-10-15 | |||
JP2012014148A | 2012-01-19 | |||
JP2010043158A | 2010-02-25 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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