Title:
OPTICAL FILM, METHOD FOR PRODUCING SAME, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/146890
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical film which is not only capable of suppressing deterioration of a polarizer but also has high toughness even if the thickness thereof is small. An optical film according to the present invention contains a cellulose ester and one or more compounds (A) selected from the group consisting of a polymer containing a repeating unit that is derived from a monomer represented by general formula (1), a compound represented by general formula (2), a compound represented by general formula (3) and a compound represented by general formula (4). This optical film has a thickness of 15-45 μm. If the optical film is elongated in the long side direction (α) or in the short side direction (β) of the optical film at 23°C at 55% RH, and if T (MPa or N/mm2) is the stress at break, E (%) is the elongation at break and A (mm2) is the cross-sectional area of the optical film in a direction perpendicular to the elongation direction, the toughness G represented by the formula below is 7-20 in the long side direction (α) and in the short side direction (β).
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Inventors:
SUZUKI SHINICHIRO
Application Number:
PCT/JP2015/058689
Publication Date:
October 01, 2015
Filing Date:
March 23, 2015
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/30; B32B7/02; B32B27/36; C08K5/13; C08K5/3462; C08L1/10; C08L45/00; G02F1/1335; G02F1/13363
Foreign References:
| JP2013174851A | 2013-09-05 | |||
| JP2007062064A | 2007-03-15 | |||
| JP2013028782A | 2013-02-07 | |||
| JP2013177547A | 2013-09-09 | |||
| JP2008287118A | 2008-11-27 | |||
| JP2011256323A | 2011-12-22 | |||
| JP2013182154A | 2013-09-12 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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