OPTICAL FILM AND LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide an optical film which can be easily released and satisfies moisture and heat resistance and optical characteristics without foaming or releasing by using acrylic polymer having specific functional group concentration as base polymer in an outermost adhesive layer of...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAOKA HISASHI, SATAKE MASAYUKI, MIYAUCHI KAZUHIKO, TANAKA YOSHIKAZU, OIZUMI SHINICHI, KOJIMA KATSUHIDE
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY 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 DYES FREQUENCY-CHANGING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PAINTS PERFORMING OPERATIONS PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an optical film which can be easily released and satisfies moisture and heat resistance and optical characteristics without foaming or releasing by using acrylic polymer having specific functional group concentration as base polymer in an outermost adhesive layer of one or both side surfaces of an optical film material and providing an adhesive layer having smaller elastic modulus at an inside of the outermost layer. SOLUTION: A superposition layer 3 of an adhesive layer is provided on one or both side surfaces of an optical film material 2, acrylic polymer having a functional group concentration of 5×1/10 mol/g or less as base polymer is used for its outermost adhesive layer 32 and an adhesive layer 31 having smaller elastic modulus is provided at its inside. A protective film 1 is laminated on the material 2, and a separator 4 is laminated underneath the layer 32. The acrylic polymer uses one or more types of acrylic ester and methacrylic ester having a glass transition temperature of -10 deg.C or lower. The adhesive layer is attached, for example, by directly attaching pressure sensitive adhesive liquid in which the adhesive is dissolved in solvent such as toluene or ethyl acetate, and has a thickness of 3 to 500μm.