Title:
POLARIZER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/090197
Kind Code:
A1
Abstract:
In order to provide a method whereby polarizers having excellent reliability in high-temperature environments can be easily and inexpensively produced, this polarizer production method includes: at least the stretching and dyeing of a polyvinyl alcohol-based resin film; and, after dyeing, the coating or spraying of the polyvinyl alcohol-based resin film, using a processing liquid that includes citric acid and lithium hydroxide. The processing liquid has a pH in the range of 2.5–6.0 and has a buffering action in said pH range.
Inventors:
MITA SATOSHI (JP)
Application Number:
PCT/JP2019/032974
Publication Date:
May 07, 2020
Filing Date:
August 23, 2019
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; C09J7/38; C09J11/02; C09J201/00
Domestic Patent References:
| WO2006095815A1 | 2006-09-14 |
Foreign References:
| JP2005062458A | 2005-03-10 | |||
| JP2016153884A | 2016-08-25 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
Download PDF:
Previous Patent: POLARIZING PLATE HAVING ADHESIVE LAYER
Next Patent: PHASE CHANGING UNIT AND VALVE TIMING CHANGING DEVICE
Next Patent: PHASE CHANGING UNIT AND VALVE TIMING CHANGING DEVICE