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Patent Searching and Data


Title:
POLARIZING MEMBRANE AND POLARIZING FILM
Document Type and Number:
WIPO Patent Application WO/2021/210342
Kind Code:
A1
Abstract:
A polarizing film formed by adsorption and orientation of iodine on a polyvinyl alcohol film, wherein the content of iodine is greater than 10 wt%, single body transmittance is not more than 41%, and in generated gas analysis in the presence of inert gas, at a temperature increase rate of 10°C/minute, and using a temperature increase range from 40°C to 350°C, the peak temperature of detected water at maximum intensity is not less than 175°C. The polarizing film has high iodine content, has an initial single body transmittance of not more than 41%, and has an excellent effect of preventing a decrease in single body transmittance due to coloring of the polarizing film in high temperature environments.

Inventors:
SAWADA HIROAKI (JP)
YAMASHITA TOMOHIRO (JP)
Application Number:
PCT/JP2021/011363
Publication Date:
October 21, 2021
Filing Date:
March 19, 2021
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30
Domestic Patent References:
WO2018235461A12018-12-27
WO2019103002A12019-05-31
WO2020066125A12020-04-02
WO2021039784A12021-03-04
WO2020100861A12020-05-22
WO2020100869A12020-05-22
WO2020184587A12020-09-17
WO2015163224A12015-10-29
Foreign References:
JP2019053291A2019-04-04
JP2015180921A2015-10-15
JP6695014B12020-05-20
JP2019152862A2019-09-12
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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