POLARIZING PLATE, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR MANUFACTURING CELLULOSE ACETATE FILM

PROBLEM TO BE SOLVED: To provide a thin polarizing plate having excellent properties relating to thermally induced wrinkles, haze and contrast irregularity, and to provide a liquid crystal display device using the polarizing plate, and further, a polarizing plate having no bubbles generating between...

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Bibliographische Detailangaben
1. Verfasser:	TANIHARA NORIE
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GENERAL PROCESSES OF COMPOUNDING METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a thin polarizing plate having excellent properties relating to thermally induced wrinkles, haze and contrast irregularity, and to provide a liquid crystal display device using the polarizing plate, and further, a polarizing plate having no bubbles generating between a base film and a hard coat layer.SOLUTION: The polarizing plate comprises a polarizer held between a protective film 1 and a protective film 2, and is characterized in that: the protective film 1 is a cellulose acetate film containing cellulose acetate having an average acetyl group substitution degree of 2.80 to 2.95, and having a film thickness of 20 to 38 μm and a tanδ that satisfies specified conditions; and the protective film 2 is a cellulose acetate film containing cellulose acetate satisfying 0.745≤D6≤0.95, wherein D6 represents an acetyl group substitution degree in the 6-th position of cellulose acetate, and having an average acetyl group substitution degree of 2.0 to 2.5, and at least one kind of polyhydric carboxylic acid ester.