Title:
PRODUCTION METHOD FOR OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2018/070146
Kind Code:
A1
Abstract:
One aspect of the present invention pertains to a production method for an optical film in a solution casting film formation method, said production method comprising preparing a dope that contains a polyimide resin, a polyarylate resin, or a cycloolefin resin, at least one alcohol solvent, and at least one good solvent for the resin, casting the optical dope on a support to form a web (cast film) on the support, releasing the web from the support, and thereafter, winding up the released web, and drying the web, wherein the production method further comprises a step for, after preparing the dope, adding an additional good solvent to the dope, and a step for, thereafter, removing the good solvent.
Inventors:
NISHIMURA HIROSHI (JP)
NANJIYOU TAKASHI (JP)
NANJIYOU TAKASHI (JP)
Application Number:
PCT/JP2017/032198
Publication Date:
April 19, 2018
Filing Date:
September 07, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C08J5/18; B29C41/24; G02B5/30; B29K79/00; B29L7/00; B29L11/00
Domestic Patent References:
| WO2016152459A1 | 2016-09-29 |
Foreign References:
| JP2016014869A | 2016-01-28 | |||
| JP2016075894A | 2016-05-12 | |||
| JP2006247894A | 2006-09-21 | |||
| JP2014177089A | 2014-09-25 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
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