Title:
POLARIZER
Document Type and Number:
Japanese Patent JP3637494
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a cellulose ester film which causes no deterioration of the UV absorbing performance and the coloring even when exposed for a long time at a high temperature and high humidity.
SOLUTION: (1) In the cellulose ester film after left for 1,000 hours in the atmosphere of 80°C and humidity of 90%RH, the amount of change of transmittance at wavelength of 400 nm or less is <2% and the amount of change of a-value and b-value obtained from tristimulus values in a 10°visual field XYZ system according to the method of JIS Z 8729 under the standard light C specified by JIS Z 8720 is respectively <0.1 and <0.3. (2) The cellulose ester film said in the term (1) contains a benzotriazole type UV absorber and metal oxide of average grain size of 0.1 μm.
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Inventors:
Toshiya Takagi
Toshiaki Shibue
Koichi Nagayasu
Toshiaki Shibue
Koichi Nagayasu
Application Number:
JP2004001769A
Publication Date:
April 13, 2005
Filing Date:
January 07, 2004
Export Citation:
Assignee:
Konica Minolta Holdings Co., Ltd.
International Classes:
G02B5/30; C08K3/22; C08L1/10; G02F1/1335; (IPC1-7): G02B5/30; C08K3/22; C08L1/10; G02F1/1335
Domestic Patent References:
| JP6235819A | ||||
| JP3148603A | ||||
| JP3064703A | ||||
| JP2135402A | ||||
| JP4247404A | ||||
| JP4270138A | ||||
| JP6130226A | ||||
| JP62161103A | ||||
| JP61129604A |