Title:
METHOD FOR MANUFACTURING POLARIZER
Document Type and Number:
WIPO Patent Application WO/2021/100253
Kind Code:
A1
Abstract:
This method for manufacturing a polarizer includes: a wet extension step for manufacturing a long belt-like polarizer by dyeing a long belt-like hydrophilic polymer film with a dyeing solution and extending the polymer film; a drying step for drying the polarizer; and a conveyance step for conveying the dried polarizer through a plurality of guide rollers. In the polarizer conveyance step, a concave roller 611 having a shape monotonously increased in diameter from the width-direction center toward the width-direction opposing ends is used as at least one of the guide rollers 61. With the polarizer manufacturing process using the wet extension method, the dried polarizer becomes insusceptible to defects such as wrinkles.
Inventors:
YAMASAKI TATSUYA (JP)
KUWAKI KIYOKAZU (JP)
KUWAKI KIYOKAZU (JP)
Application Number:
PCT/JP2020/029294
Publication Date:
May 27, 2021
Filing Date:
July 30, 2020
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B29C55/02; G02B5/30
Foreign References:
| JP2017167565A | 2017-09-21 | |||
| JP2006306029A | 2006-11-09 | |||
| JP2005111969A | 2005-04-28 | |||
| US6058844A | 2000-05-09 |
Attorney, Agent or Firm:
MAKOTO INTERNATIONAL PATENT ATTORNEYS OFFICE (JP)
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