Title:
METHOD FOR MANUFACTURING POLARIZING MEMBRANE, AND METHOD FOR MANUFACTURING POLARIZING FILM
Document Type and Number:
WIPO Patent Application WO/2021/054357
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a polarizing membrane, the method comprising: a step (I-1) for at least dyeing, cross-linking, and stretching a polyvinyl alcohol-based film while conveying the polyvinyl alcohol-based film in the longitudinal direction, to produce a water-containing polarizing membrane; a step (I-2) for applying a liquid to the obtained water-containing polarizing membrane in a state in which the water content in the polarizing membrane is at least X wt%, to produce a polarizing membrane containing liquid-impregnated components; and a step (I-3) for drying the obtained polarizing membrane containing liquid-impregnated components to produce a dried polarizing membrane, wherein expression (1): X (wt%)/thickness (μm) of the dried polarizing membrane > 1 (in expression (1), X is 10-70) is satisfied. The method for manufacturing a polarizing membrane according to the present invention permits an arbitrary component to be easily and sufficiently contained in the polarizing membrane.
Inventors:
YAMASHITA TOMOHIRO (JP)
KURODA TAKUMA (JP)
YAGI SHIOMI (JP)
TAKADA KATSUNORI (JP)
MIYAZAKI MAKOTO (JP)
KURODA TAKUMA (JP)
YAGI SHIOMI (JP)
TAKADA KATSUNORI (JP)
MIYAZAKI MAKOTO (JP)
Application Number:
PCT/JP2020/035068
Publication Date:
March 25, 2021
Filing Date:
September 16, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; G02F1/1335
Domestic Patent References:
| WO2019103003A1 | 2019-05-31 | |||
| WO2019177134A1 | 2019-09-19 |
Foreign References:
| JP2013178356A | 2013-09-09 | |||
| JP2017126038A | 2017-07-20 | |||
| JP2015180910A | 2015-10-15 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Download PDF: