Title:
METHOD FOR PRODUCING OPTICAL FILM, OPTICAL FILM, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/145560
Kind Code:
A1
Abstract:
The present invention relates to a method for producing an optical film that comprises an acrylic resin and a cellulose ester resin fulfilling the equations 2.3 ≤ X+Y ≤ 2.6 and 1.4 ≤ X ≤ 2.6 or an optical film that comprises a cellulose ester resin in which the degree of substitution of an acetyl group in a cellulose ester moiety is 2.0 to 2.5, said method being characterized in that the production is carried out by a solvent-casting film formation process using a dope that has a water content of 2.0 to 5.0 mass% during a period from the initiation of the production to a rising time at which a steady operation is initiated and has a water content of 0.6 to 2.0 mass% during a period in which the steady operation is carried out.
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Inventors:
NISHIMURA HIROSHI (JP)
Application Number:
PCT/JP2013/001280
Publication Date:
October 03, 2013
Filing Date:
March 01, 2013
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
B29C41/24; C08J5/18; C08L1/10; C08L33/04; G02F1/1335
Domestic Patent References:
| WO2011158627A1 | 2011-12-22 |
Foreign References:
| JP2011123316A | 2011-06-23 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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