OPTICAL FILM, POLARIZING PLATE AND DISPLAY APPARATUS

• Main Authors: MICHIHASHI ISAMU, MURAKAMI TAKASHI
• Format: Patent
• Language: English
• Published: 27.04.2006
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide an optical film having less whitening defect in a film, hardly causing uneven hardness of an active ray curing resin layer or a stripe defect in an antireflection layer, and having decreased color irregularity in a film manufactured by a film forming method with superior productivity in simple equipment, and to provide a polarizing plate and a display apparatus using the optical film. SOLUTION: The optical film is formed by extruding a melted material by heating which contains a cellulose resin having 2.5 to 2.9 total substitution degree of acyl groups, a plasticizer and a UV absorbent having 490 to 50,000 weight average molecular weight, and then by cooling. The UV absorbent has at least two or more benzotriazole skeletons as a UV absorbing skeleton. COPYRIGHT: (C)2006,JPO&NCIPI