Title:
CELLULOSE ESTER FILM, PRODUCTION METHOD THEREFOR, POLARIZING PLATE PROVIDED THEREWITH, AND LIQUID CRYSTAL DISPLAY
Document Type and Number:
WIPO Patent Application WO/2012/035838
Kind Code:
A1
Abstract:
Provided are a cellulose ester film with high transmittance, and a production method therefor. Further, provided are a polarizing plate provided with the cellulose ester film, and a liquid crystal display with high contrast. This cellulose ester film contains a cellulose ester including an acyl group having 2 to 4 carbon atoms, and the substitution degree of the acyl group is 2.0 to 2.5. The cellulose ester film is characterized in that the number of foreign bodies having a diameter translated into circle in the range of 60 to 100 μ is 10 pieces or less per 10 cm2, the number of foreign bodies having a diameter translated into circle in the range of 10 to 50 μ is 10 pieces or less per 10 cm2, the internal haze is 0.1 or less, and the thickness is in the range of 20 to 50 μm.
Inventors:
TAMAGAWA MINORI (JP)
Application Number:
PCT/JP2011/064004
Publication Date:
March 22, 2012
Filing Date:
June 20, 2011
Export Citation:
Assignee:
KONICA MINOLTA OPTO INC (JP)
TAMAGAWA MINORI (JP)
TAMAGAWA MINORI (JP)
International Classes:
C08J5/18; B29C41/24; B29C41/32; B32B23/20; C08B3/06; C08B3/08; B29K1/00; B29L7/00; B29L9/00
Foreign References:
| JP2007276280A | 2007-10-25 | |||
| JP2010058331A | 2010-03-18 | |||
| JP2009286931A | 2009-12-10 |
Download PDF:
Claims: