OPTICAL FILM AND LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide an optical film which can be easily released, causes no foaming or releasing and scarcely lowers its optical characteristics by providing an adhesive layer using acrylic polymer having specific functional group concentration as base polymer and having specific releas...

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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, causes no foaming or releasing and scarcely lowers its optical characteristics by providing an adhesive layer using acrylic polymer having specific functional group concentration as base polymer and having specific release adhesive force to a release side adherend on one or both side surfaces of an optical film material. SOLUTION: An adhesive layer 3 using acrylic polymer having a functional group concentration of 5×1/10 mol/g or less as base polymer and having 90 degrees release adhesive force to a release side adherend of 600g/20mm or less is provided on one side or both side surfaces of an optical film material 2. A protective film 1 is laminated on the material 2, and a separator 4 is laminated underneath the layer 3. 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 a type for 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 1 to 500μm.