Title:
PRODUCTION METHOD FOR POLARIZING PLATE PROTECTION FILM
Document Type and Number:
WIPO Patent Application WO/2022/215407
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a production method for a polarizing plate protection film that contains a cycloolefin polymer having improved adhesion to a polyvinyl alcohol film. This production method for a polarizing plate protection film is characterized by comprising at least: a rolled source film production step including a step for forming a web through flow-casting of a dope on a support at a transport speed V1, a step for performing the first stage of stretching on the web having a web width immediately after the flow-casting, and a step for rolling up a film formed by drying the web; and a processing step including a step for transporting the rolled-up film at a transport speed V2 satisfying V1
Inventors:
XU NAIAO (JP)
KOIDE TAKUYA (JP)
KOIDE TAKUYA (JP)
Application Number:
PCT/JP2022/009683
Publication Date:
October 13, 2022
Filing Date:
March 07, 2022
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/30; B29C41/28; B29C41/52; B29C55/06
Domestic Patent References:
| WO2013140501A1 | 2013-09-26 | |||
| WO2013140453A1 | 2013-09-26 |
Foreign References:
| JP2018054640A | 2018-04-05 | |||
| JP2004133209A | 2004-04-30 | |||
| JP2003337202A | 2003-11-28 | |||
| JP2019120879A | 2019-07-22 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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