WO2006043451A1 - 帯電防止性光学フィルム、帯電防止性粘着型光学フィルム、それらの製造方法および画像表示装置 - Google Patents
帯電防止性光学フィルム、帯電防止性粘着型光学フィルム、それらの製造方法および画像表示装置 Download PDFInfo
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- WO2006043451A1 WO2006043451A1 PCT/JP2005/018767 JP2005018767W WO2006043451A1 WO 2006043451 A1 WO2006043451 A1 WO 2006043451A1 JP 2005018767 W JP2005018767 W JP 2005018767W WO 2006043451 A1 WO2006043451 A1 WO 2006043451A1
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- optical film
- antistatic
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- adhesive
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/12—Optical coatings produced by application to, or surface treatment of, optical elements by surface treatment, e.g. by irradiation
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/22—Antistatic materials or arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
Definitions
- Antistatic optical film antistatic adhesive optical film, production method thereof and image display device
- the present invention relates to an antistatic optical film in which an antistatic layer is laminated on at least one surface of an optical film.
- the present invention also relates to an antistatic pressure-sensitive adhesive optical film in which an adhesive layer is laminated on the antistatic layer of the antistatic optical film.
- the present invention relates to an image display device such as a liquid crystal display device, an organic EL display device, and a PDP using the antistatic optical film and the antistatic adhesive optical film.
- the optical film include a polarizing plate, a phase difference plate, an optical compensation film, a brightness enhancement film, and those having a S-layer.
- polarizing elements In a liquid crystal display or the like, it is indispensable to dispose polarizing elements on both sides of the liquid crystal cell, and generally polarizing plates are attached.
- various optical elements are being used for liquid crystal panels in order to improve the display quality of displays.
- a retardation plate for preventing coloring For example, a viewing angle widening film for improving the viewing angle of a liquid crystal display, and a brightness enhancement film for increasing the contrast of the display are used. These films are collectively called optical films.
- optical films are usually used in the transportation and manufacturing process until they are delivered to consumers!
- the surface of the optical film is protected from scratches and dirt. Rum is pasted together.
- the surface protective film may be peeled off after being attached to an LCD or the like, or the same or another surface protective film may be attached again after being peeled off once.
- static electricity generate
- the array elements inside the LCD panel are affected, which further affects the alignment of the liquid crystal and induces defects.
- the surface protective film is not only for peeling, A similar problem occurs due to friction between optical films depending on how the consumer uses them.
- an optical film such as a polarizing plate.
- an optical film with an antistatic layer provided with an antistatic layer on the surface of the optical film, and a transparent conductive layer provided on one side or both sides of the optical film are disclosed.
- an adhesive is usually used when adhering an optical film to a liquid crystal cell.
- the pressure-sensitive adhesive has a merit that a drying process is not required to fix the optical film, and thus the pressure-sensitive adhesive is a pressure-sensitive adhesive optical film previously provided as a pressure-sensitive adhesive layer on one side of the optical film. Film is commonly used.
- the adhesive optical film is cut into a display size.
- the adhesive may be lost at that part.
- the lacked part does not adhere, so that there is a problem that light is reflected at that part, resulting in a display defect.
- the display frame has been narrowed recently, and the display quality is significantly deteriorated due to the defects occurring at the edge.
- Patent Document 1 An antistatic layer containing conductive particles in an antiglare layer on the surface of a polarizing plate to impart antistatic properties to the antiglare layer and an adhesive layer formed on the opposite surface has been proposed (Patent Document 1). .
- Patent Document 1 it is difficult to maintain characteristics as an antiglare layer, and stability is poor.
- an antistatic layer is provided on the adhesive optical film, an antistatic layer is provided between the optical film and the adhesive layer in order to eliminate the alignment failure of the liquid crystal cell resulting from the application of voltage that occurs inside the panel. preferable.
- the adhesive is missing or adhesive residue is not present. There was a problem with reworkability.
- Patent Document 2 As a method for imparting an antistatic function to an optical film, a method in which a conductive material is contained in an adhesive layer has been proposed (Patent Document 2). However, in the method of Patent Document 2, it is difficult to maintain the properties as the pressure-sensitive adhesive layer, and the stability is poor.
- Patent Document 1 Japanese Patent Laid-Open No. 10-239521
- Patent Document 2 Japanese Patent Laid-Open No. 2003-294951
- Patent Document 3 Japanese Patent Laid-Open No. 2002-179954
- An object of the present invention is to provide an antistatic optical film in which an antistatic layer is laminated on at least one surface of an optical film, which has an excellent antistatic effect and a high light transmittance. And It is another object of the present invention to provide an antistatic pressure-sensitive adhesive optical film having good reworking property in which, in addition to the above-described effects, the adhesive chipping hardly occurs. Furthermore, it aims at providing the image display apparatus using the said antistatic optical film.
- the present invention relates to an antistatic optical film in which an antistatic layer is laminated on at least one surface of the optical film, and a rubbing treatment is performed on the surface of the optical film on the side on which the antistatic layer is laminated. And an antistatic optical film, wherein the conductive polymer in the antistatic layer is oriented.
- the present inventors previously performed a rubbing treatment on the surface of the optical film, and then performed the rubbing treatment.
- the conductive polymer (and the binder component) is oriented in a certain direction, thereby effectively suppressing light absorption. I found out that I can do it.
- the optical film has optical anisotropy, and is rubbed at a rubbing angle within ⁇ 10 ° with respect to the slow axis. More preferably, it is within ⁇ 5 °, particularly preferably 0 °.
- a rubbing angle within ⁇ 10 ° with respect to the slow axis.
- light absorption can be more effectively suppressed.
- the reason why such an effect is obtained is that by conducting a rubbing treatment in the slow axis direction of the optical film, the conductive polymer (and the binder component) in the antistatic layer is oriented parallel to the slow axis, This is thought to be because light transmitted through the optical film is less absorbed by the conductive polymer (and the binder component).
- the present invention provides an antistatic optical film in which an antistatic layer is laminated on at least one surface of the optical film, the surface of the antistatic layer is subjected to rubbing treatment, and
- the present invention relates to an antistatic optical film characterized in that a conductive polymer is oriented.
- the orientation of the conductive polymer (and the binder component) can be controlled by rubbing the surface thereof, thereby effectively suppressing light absorption. As a result, a decrease in light transmittance of the optical film can be suppressed.
- the conductive polymer is preferably a water-soluble or water-dispersible conductive polymer.
- the water-soluble or water-dispersible conductive polymer is preferably a polythiophene-based conductive polymer.
- the antistatic layer preferably further contains a binder component.
- the binder component is preferably at least one selected from the group consisting of polyurethane-based resin, polyester-based resin and acrylic-based resin.
- the present invention also relates to an antistatic pressure-sensitive adhesive optical film in which an adhesive layer is laminated on the antistatic layer of the antistatic optical film.
- the inventors of the present invention are the main cause of adhesive loss and adhesive residue during rework from the liquid crystal panel.
- the reason is that the adhesion between the optical film and the pressure-sensitive adhesive layer is low due to the provision of the antistatic layer, and in particular, the water-soluble or water-dispersible conductive polymer (and the By using one component, the adhesion between the antistatic layer and the pressure-sensitive adhesive layer can be improved.
- the adhesion between the antistatic layer and the pressure-sensitive adhesive layer can be improved.
- the handling property of the adhesive optical film can be improved.
- the antistatic layer is provided between the optical film and the pressure-sensitive adhesive layer, it is possible to suppress the generation of static electricity due to peeling of the surface protective film, which has a good antistatic effect, and friction due to friction of the optical film. And alignment failure of the liquid crystal can be prevented.
- the optical film and the pressure-sensitive adhesive layer can maintain respective characteristics and are excellent in stability.
- the pressure-sensitive adhesive layer is preferably formed of an acrylic pressure-sensitive adhesive.
- the present invention is also a method for producing the antistatic optical film, the step of rubbing the surface of the optical film on the side on which the antistatic layer is formed, and the optical film subjected to the rubbing treatment
- the present invention relates to a method for producing an antistatic optical film, which comprises a step of applying a coating solution containing a conductive polymer to the surface and drying to form an antistatic layer.
- the present invention is a method for producing the antistatic optical film, wherein a coating liquid containing a conductive polymer is applied to at least one surface of the optical film and dried to form an antistatic layer.
- the present invention relates to a method for producing an antistatic optical film, comprising a step of forming and a step of rubbing the surface of the antistatic layer.
- the present invention is also a method for producing the antistatic pressure-sensitive adhesive optical film, wherein the surface of the optical film on the side where the antistatic layer is formed is subjected to a rubbing treatment, and the optical film subjected to the rubbing treatment.
- An antistatic adhesive comprising a step of applying a coating solution containing a conductive polymer to the surface of the film and drying to form an antistatic layer, and a step of forming an adhesive layer on the antistatic layer.
- the present invention relates to a method for producing a mold optical film.
- the present invention is also a method for producing the antistatic pressure-sensitive adhesive optical film, wherein a coating liquid containing a conductive polymer is applied to at least one surface of the optical film and dried. Forming an antistatic layer, performing a rubbing process on the surface of the antistatic layer, and forming a pressure-sensitive adhesive layer on the antistatic layer subjected to the rubbing process.
- the manufacturing method is also a method for producing the antistatic pressure-sensitive adhesive optical film, wherein a coating liquid containing a conductive polymer is applied to at least one surface of the optical film and dried. Forming an antistatic layer, performing a rubbing process on the surface of the antistatic layer, and forming a pressure-sensitive adhesive layer on the antistatic layer subjected to the rubbing process.
- a transparent conductive layer has been formed by a vacuum deposition method, a sputtering method, an ion plating method, or the like, but these methods are expensive to manufacture. Productivity was bad. According to the production method of the present invention, since the antistatic layer can be formed by a coating method such as coating, productivity is good.
- the present invention also relates to an image display device using at least one sheet of the antistatic optical film or the antistatic adhesive optical film.
- the antistatic optical film or the antistatic pressure-sensitive adhesive optical film of the present invention is used in combination of one or more depending on various usages of an image display device such as a liquid crystal display device.
- FIG. 1 is an example of a cross-sectional view of an antistatic adhesive optical film of the present invention.
- an antistatic layer 2 and an adhesive layer 3 are laminated in this order on one side of the optical film 1.
- FIG. 1 shows the case where the adhesive layer 3 is provided on one side of the optical film 1, but the adhesive layer 3 may be provided on both sides of the optical film. Further, the pressure-sensitive adhesive layer 3 on the other side may have the antistatic layer 2.
- the antistatic optical film of the present invention is a case where the pressure-sensitive adhesive layer 3 is not provided in FIG.
- the antistatic layer 2 of the antistatic adhesive optical film of the present invention contains a conductive polymer as an antistatic agent.
- the conductive polymer a polymer having good optical properties, appearance, antistatic effect and antistatic effect when heated and humidified is used.
- a conductive polymer examples thereof include polymers such as polyarine, polythiophene, polypyrrole, and polyquinoxaline.
- polyaniline, polythiophene, and the like that are likely to become a water-soluble conductive polymer or a water-dispersible conductive polymer are preferably used.
- Polythiophene is particularly preferable.
- the coating liquid for forming the antistatic layer can be prepared as an aqueous solution or an aqueous dispersion, and there is no need to use an organic solvent for the coating liquid. . Therefore, it is possible to suppress deterioration and deterioration of the optical film base material due to the organic solvent.
- the aqueous solution or aqueous dispersion preferably contains only water as a solvent from the viewpoint of adhesion, but may contain a hydrophilic solvent.
- hydrophilic solvent examples include methanol, ethanol, n propanol, isopropanol, n-butanol, isobutanol, sec butanol, tert-butanol, n-amyl alcohol, isoamyl alcohol, sec amyl alcohol, tert amyl alcohol.
- alcohols such as 1-ethyl-1-propanol, 2-methyl-1-butanol, n-xanol, and cyclohexanol.
- the water-soluble or water-dispersible polyaline preferably has a weight average molecular weight in terms of polystyrene of 500000 or less, more preferably 300000 or less.
- the water-soluble or water-dispersible polythiophene has a weight average molecular weight in terms of polystyrene of preferably 400 000 or less, more preferably 300000 or less. When the weight average molecular weight exceeds the above value, the water solubility or water dispersibility tends to be insufficient.
- a coating liquid aqueous solution or water dispersion
- the solid content of the polymer remains in the coating solution, or the viscosity tends to increase, and it tends to be difficult to form an antistatic layer having a uniform thickness.
- the water solubility of the water-soluble conductive polymer means a case where the solubility in 100 g of water is 5 g or more.
- the solubility of the water-soluble conductive polymer in 100 g of water is preferably 20 30 g.
- a water-dispersible conductive polymer is a polymer in which a conductive polymer such as polyaline or polythiophene is in the form of fine particles and dispersed in water.
- the aqueous dispersion has a small liquid viscosity and can be easily applied to a thin film. Or the uniformity of the coating layer is excellent.
- the fine particle size of 1 ⁇ m or less is preferable in terms of the uniformity of the antistatic layer.
- the water-soluble conductive polymer such as polyaline and polythiophene or the water-dispersible conductive polymer preferably has a hydrophilic functional group in the molecule.
- hydrophilic functional groups include sulfone groups, amino groups, amide groups, imino groups, quaternary ammonium bases, hydroxyl groups, mercapto groups, hydrazino groups, carboxyl groups, sulfate ester groups, phosphate ester groups, Or a salt thereof.
- Having a hydrophilic functional group in the molecule makes it easy to dissolve in water, or facilitates dispersion in water in the form of fine particles, so that the water-soluble conductive polymer or water-dispersible conductive polymer can be easily prepared. it can.
- Examples of commercially available water-soluble conductive polymers include poly-phosphorus sulfonic acid (manufactured by Mitsubishi Rayon Co., Ltd., weight average molecular weight in terms of polystyrene of 150,000).
- Examples of commercially available water-dispersible conductive polymers include polythiophene-based conductive polymers (trade name, Denatron series, manufactured by Nagase Chemtech).
- the material for forming the antistatic layer it is preferable to use a noder component V for the purpose of improving the film-forming property of the antistatic agent and the adhesion to the optical film together with the conductive polymer.
- a noder component V for the purpose of improving the film-forming property of the antistatic agent and the adhesion to the optical film together with the conductive polymer.
- the antistatic agent is a water-soluble conductive polymer or a water-dispersible conductive polymer is an aqueous material, it is preferable to use a water-soluble or water-dispersible binder component.
- binder components include polyurethane-based resins, polyester-based resins, acrylic-based resins, polyether-based resins, cellulose-based resins, polybulal alcohol-based resins, epoxy resins, polyvinylpyrrolidone, polystyrene-based resins. Examples thereof include fat, polyethylene glycol, pentaerythritol and the like.
- polyurethane-based resin, polyester-based resin, and acrylic-based resin are preferable.
- These binder components can be used alone or in combination of two or more as appropriate.
- the amount of the solder component used depends on the type of conductive polymer. Usually 0.1 to 0.1 parts by weight of the conductive polymer for 100 parts by weight of the binder component, and further 1 to 50 parts by weight. Is preferred.
- the surface resistance value of the antistatic layer is preferably 1 X 10 12 ⁇ inlet or less, more preferably 1 X 10 1Q QZ or less, particularly preferably 1 9 10 9 ⁇ inlet or less. It is. If the surface resistance exceeds 1 X 10 12 ⁇ , the static electricity is generated due to the peeling of the surface protection film or the friction of the optical film that does not have sufficient antistatic function. Or alignment failure of the liquid crystal may occur.
- the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer 3 of the antistatic pressure-sensitive adhesive optical film of the present invention is not particularly limited, and examples thereof include acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyetheroles, fluorine-based polymers.
- Those having a base polymer of a polymer such as rubber or the like can be appropriately selected and used.
- those excellent in optical transparency, exhibiting appropriate wettability, cohesiveness, and adhesive pressure-sensitive adhesive properties and excellent in weather resistance and heat resistance are preferably used.
- An acrylic pressure-sensitive adhesive is preferably used to exhibit such characteristics.
- the acrylic pressure-sensitive adhesive is based on an acrylic polymer having an alkyl (meth) acrylate monomer unit as a main skeleton.
- (meta) acrylate refers to ate and Z or meta acrylate, and (meta) in the present invention has the same meaning.
- the average number of carbon atoms of the alkyl group of the alkyl (meth) acrylate that constitutes the main skeleton of the acrylic polymer is about 1 to 12, and specific examples of the alkyl (meth) acrylate include methyl (meth) acrylate.
- alkyl (meth) acrylates having 1 to 9 carbon atoms in the alkyl group are preferred.
- acrylic polymer one or more kinds of monomers are introduced by copolymerization for the purpose of improving adhesiveness and heat resistance.
- specific examples of such copolymerization monomers include (meth) acrylic acid 2-hydroxyethyl, (meth) acrylic acid 2-hydroxypropyl, (meth) acrylic acid 4-hydroxybutyl, and (meth) acrylic acid.
- (N-substituted) amides such as (meth) acrylamide, N, N dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide, etc.
- carboxyl group-containing monomers such as acrylic acid are preferably used from the viewpoints of adhesion to liquid crystal cells and adhesion durability for optical film applications.
- the proportion of the copolymerization monomer in the acrylic polymer is not particularly limited, but is preferably about 0.1 to 10% in weight ratio.
- the average molecular weight of the acrylic polymer is not particularly limited, but the weight average molecular weight is preferably about 300,000 to 2.5 million.
- the production of the acrylic polymer is known in various ways. For example, a radical polymerization method such as a Balta polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected.
- a radical polymerization method such as a Balta polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected.
- the radical polymerization initiator various known ones such as azo and peroxide can be used.
- the reaction temperature is usually about 50-80 ° C, and the reaction time is 1-8 hours.
- ethyl acetate, toluene and the like are generally used as the solvent for the acrylic polymer for which the solution polymerization method is preferred.
- the solution concentration is usually about 20 to 80% by weight.
- Examples of the base polymer of the rubber adhesive include natural rubber, isoprene rubber, styrene butadiene rubber, recycled rubber, polyisobutylene rubber, styrene-soprene styrene rubber, styrene butadiene styrene, and the like. System rubber and the like.
- Examples of the base polymer for the silicone-based pressure-sensitive adhesive include dimethylpolysiloxane and diphenylpolysiloxane. These base polymers can also be used in which functional groups such as carboxyl groups are introduced.
- the pressure-sensitive adhesive is preferably a pressure-sensitive adhesive composition containing a crosslinking agent.
- the polyfunctional compound that can be added to the pressure-sensitive adhesive include organic crosslinking agents and polyfunctional metal chelates.
- the organic crosslinking agent include an epoxy crosslinking agent, an isocyanate crosslinking agent, and an imine crosslinking agent.
- an isocyanate crosslinking agent is preferred.
- a polyfunctional metal chelate is one in which a polyvalent metal is covalently or coordinately bonded to an organic compound.
- Multivalent metal atoms include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, etc. Can be given.
- Examples of the atoms in the organic compound to be covalently bonded or coordinated include oxygen atoms, and examples of the organic compound include alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, and ketone compounds.
- the mixing ratio of the base polymer such as acrylic polymer and the crosslinking agent is not particularly limited! However, usually, the crosslinking agent (solid content) is preferably about 0.01 to 10 parts by weight and more preferably about 0.1 to 5 parts by weight with respect to 100 parts by weight of the base polymer (solid content).
- Sarakuko has a tackifier, plasticizer, glass fiber, glass bead, metal powder, other inorganic powder, filler, pigment, colorant, etc. Fillers, antioxidants, UV absorbers, silane coupling agents, etc. should also be used without departing from the purpose of the present invention. In the range, various additives can be appropriately used. Moreover, it is good also as an adhesive layer etc. which contain microparticles
- the optical film 1 used for the antistatic pressure-sensitive adhesive optical film of the present invention those used for forming an image display device such as a liquid crystal display device are used, and the type thereof is not particularly limited.
- the optical film includes a polarizing plate.
- the polarizing plate one having a transparent protective film on one side or both sides of the polarizer is generally used.
- the polarizer is not particularly limited, and various types can be used.
- the polarizer include hydrophilic polymer films such as polybulal alcohol film, partially formalized polybulal alcohol film, and ethylene / acetic acid copolymer partial ken film, and iodine and dichroic dyes.
- examples include uniaxially stretched films by adsorbing dichroic substances, and polyvinyl-based oriented films such as dehydrated polyvinyl alcohol and dehydrochlorinated polyvinyl chloride.
- a polybulol alcohol film and a polarizer having dichroic substance power such as iodine are preferable.
- the thickness of these polarizers is not particularly limited. Generally, the thickness is about 5 to 80 ⁇ m.
- a polarizer obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching it is prepared by, for example, dyeing polyvinyl alcohol in an aqueous solution of iodine and stretching it 3 to 7 times the original length. Can do. If necessary, it can also be immersed in an aqueous solution of potassium iodide or the like which may contain boric acid, zinc sulfate, zinc chloride and the like. Furthermore, if necessary, the polyvinyl alcohol film may be immersed in water and washed before dyeing.
- the stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be stretched and dyed with strong iodine.
- the film can be stretched even in an aqueous solution of boric acid or potassium iodide or in a water bath.
- a material for forming a transparent protective film provided on one or both sides of the polarizer a material excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, and the like is preferable.
- polyester such as polyethylene terephthalate and polyethylene naphthalate Tenole polymer
- Senolellose polymer such as diacetylenoresenorelose and triacetinoresenolose
- Acrylic polymer such as polymethylmetatalylate
- AS resin Atari mouth-tolyl styrene copolymer
- styrene-based polymers polycarbonate-based polymers and the like.
- polyethylene, polypropylene, polyolefins having a cyclo or norbornene structure polyolefin polymers such as ethylene / propylene copolymers, salt-and-bulb polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, Snorephone-based polymer, Polyetherenorenolephone-based polymer, Polyethylene-noreno-ketone-based polymer, Polyphenylene sulfide-based polymer, Vinyl alcohol-based polymer, Vinylidene chloride-based polymer, Vinyl butyral-based polymer, Arylate-based polymer, Polyoxymethylene-based Examples of the polymer that forms the transparent protective film include polymers, epoxy polymers, and blends of the above polymers.
- the transparent protective film can also be formed as a cured layer of thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, and silicone.
- a polymer film described in JP-A-2001-343529 for example, (A) a thermoplastic resin having a substituted side chain and a Z or non-midamide group, and (B) side Examples thereof include a resin composition containing a thermoplastic resin having a substituted and Z or unsubstituted fullyl and -tolyl group in the chain.
- a specific example is a film of a resin composition containing an alternating copolymer of isobutylene and N-methylmaleimide and an acrylonitrile / styrene copolymer.
- a strong film such as a mixed extruded product of the resin composition can be used.
- the thickness of the protective film can be appropriately determined, but is generally about 1 to 500 m from the viewpoint of workability such as strength and handleability, and thin film properties. In particular, 5 to 200 m is preferable.
- a protective film having a thickness of 90 nm to +75 nm is preferably used.
- Thickness direction retardation (Rt h) is more preferably from 80 nm to +60 nm, and particularly preferably from 170 nm to +45 nm.
- a cellulose polymer such as triacetyl cellulose is preferable from the viewpoint of polarization characteristics and durability.
- a triacetyl cellulose film is particularly preferable.
- protective films having the same polymer material strength may be used on the front and back sides, or different protective films having the same polymer material strength may be used.
- the polarizer and the protective film are usually in close contact with each other through an aqueous adhesive or the like.
- water-based adhesives include isocyanate-based adhesives, polyvinyl alcohol-based adhesives, gelatin-based adhesives, vinyl-based latex-based, water-based polyurethane, water-based polyester, and the like.
- the surface of the transparent protective film to which the polarizer is not adhered may be subjected to a hard coat layer, antireflection treatment, anti-sticking treatment, or treatment for diffusion or antiglare.
- the hard coat treatment is performed for the purpose of preventing scratches on the surface of the polarizing plate.
- curing with excellent UV hardness curable resin such as acrylic and silicone is excellent in hardness and sliding characteristics. It can be formed by a method of adding a film to the surface of the transparent protective film.
- the antireflection treatment is performed for the purpose of preventing reflection of external light on the surface of the polarizing plate, and can be achieved by forming an antireflection film or the like according to the conventional art.
- the sticking prevention treatment is performed for the purpose of preventing adhesion with an adjacent layer of another member.
- the anti-glare treatment is performed for the purpose of preventing external light from being reflected on the surface of the polarizing plate and obstructing the visual recognition of the light transmitted through the polarizing plate. It can be formed by imparting a fine concavo-convex structure to the surface of the transparent protective film by an appropriate method such as a surface roughening method or a method of blending transparent fine particles.
- the fine particles to be included in the formation of the surface fine concavo-convex structure include silica, alumina, titanium dioxide, zirconium oxide, tin oxide, indium oxide, cadmium oxide, and acid oxide having an average particle diameter of 0.5 to 50 ⁇ m.
- Transparent fine particles such as inorganic fine particles that may have conductivity such as antimony and organic fine particles (including beads) that also have crosslinked or uncrosslinked polymer are used.
- the amount of fine particles used is generally about 2 to 50 parts by weight with respect to 100 parts by weight of the transparent resin forming the surface fine uneven structure. 5 to 25 parts by weight is preferable.
- the anti-glare layer may also serve as a diffusion layer (such as a visual enlargement function) for diffusing the light transmitted through the polarizing plate to enlarge vision.
- the antireflection layer, the anti-sticking layer, the diffusion layer, the antiglare layer, and the like can be provided on the transparent protective film itself, or separately from the transparent protective film as an optical layer. It can also be provided.
- the optical film is used for forming a liquid crystal display device such as a reflection plate, an anti-transmission plate, a retardation plate (including wavelength plates such as 1Z2 and 1Z4), a visual compensation film, and a brightness enhancement film. And an optical layer that has a problem. These can be used alone as an optical film, or can be laminated on the polarizing plate for practical use and used in one or more layers.
- a reflective polarizing plate or semi-transmissive polarizing plate in which a polarizing plate is further laminated with a reflective plate or a semi-transmissive reflective plate, and an elliptical polarizing plate or circular plate in which a retardation plate is further laminated on a polarizing plate.
- a polarizing plate, a wide viewing angle polarizing plate in which a visual compensation film is further laminated on the polarizing plate, or a polarizing plate in which a brightness enhancement film is further laminated on the polarizing plate are preferable.
- the reflective polarizing plate is a polarizing plate provided with a reflective layer, and is used to form a liquid crystal display device that displays incident light by reflecting incident light from the viewing side (display side).
- the built-in light source such as a backlight can be omitted and the liquid crystal display device can be thinned easily.
- the reflective polarizing plate can be formed by an appropriate method such as a method in which a reflective layer having a metal isotropic force is attached to one surface of the polarizing plate via a transparent protective layer or the like, if necessary.
- a reflective layer is formed by attaching a foil vapor-deposited film made of a reflective metal such as aluminum on one side of a transparent protective film matted as necessary.
- the transparent protective film may include fine particles having a surface fine uneven structure, and a reflective layer having a fine uneven structure on the surface.
- the reflective layer having the fine concavo-convex structure described above has the advantage that incident light is diffused by irregular reflection to prevent directivity and glaring appearance, and to suppress unevenness in brightness and darkness.
- the protective film containing fine particles has an advantage that incident light and its reflected light are diffused when passing through it and light and darkness can be further suppressed.
- the surface roughness of the transparent protective film is formed by a method in which a metal is directly attached to the surface of the transparent protective layer by an appropriate method such as a vacuum deposition method, an ion plating method, a sputtering method, or a plating method. Can do.
- the reflecting plate instead of the method of directly applying the reflecting plate to the transparent protective film of the polarizing plate, it can be used as a reflecting sheet in which a reflecting layer is provided on an appropriate film according to the transparent film.
- the reflective layer usually has a metallic force, the usage state in which the reflective surface is covered with a transparent protective film or a polarizing plate is used to prevent the reflectance from being lowered by oxidation, and thus the long-term initial reflectance. It is more preferable in terms of sustainability and avoiding the separate provision of a protective layer.
- the transflective polarizing plate can be obtained by using a transflective reflective layer such as a half mirror that reflects and transmits light by the reflective layer.
- Transflective polarizing plate can be obtained by using a transflective reflective layer such as a half mirror that reflects and transmits light by the reflective layer.
- the liquid crystal cell When using a liquid crystal display device etc. in a relatively bright atmosphere, it reflects the incident light from the viewing side (display side) and displays an image. Under the atmosphere, it is built in the back side of the transflective polarizing plate and can be used to form liquid crystal display devices that display images using a built-in power source such as a backlight.
- the transflective polarizing plate can save energy when using a light source such as a knocklight in a bright atmosphere, and can be used with a built-in power supply even in a relatively low atmosphere. It is useful for the formation of
- a phase difference plate or the like is used when changing linearly polarized light into elliptically or circularly polarized light, changing elliptically or circularly polarized light into linearly polarized light, or changing the polarization direction of linearly polarized light.
- a so-called 1Z4 wavelength plate also called a ⁇ 4 plate
- a 1Z2 wavelength plate (also referred to as ⁇ 2 plate) is usually used to change the polarization direction of linearly polarized light.
- the elliptically polarizing plate compensates (prevents) coloring (blue or yellow) caused by double bending of the liquid crystal layer of the super twist nematic (STN) type liquid crystal display device, and displays the above-mentioned coloring! It is used effectively in such cases. Furthermore, those with a controlled three-dimensional refractive index are preferable because they can compensate (prevent) coloring that occurs when the screen of a liquid crystal display device is viewed from an oblique direction. Yes.
- the circularly polarizing plate is effectively used, for example, when adjusting the color tone of an image of a reflective liquid crystal display device in which an image is displayed in color, and also has an antireflection function.
- Examples of the retardation plate include a birefringent film obtained by uniaxially or biaxially stretching a polymer material, a liquid crystal polymer alignment film, and a liquid crystal polymer alignment layer supported by the film. It is done.
- the thickness of the retardation plate is not particularly limited, but is generally about 20 to 150 / ⁇ ⁇ .
- polymer material examples include polybutyl alcohol, polybutyl butyral, polymethyl vinylenoether, polyhydroxy ethino rare talylate, hydroxy ethinore cellulose, hydroxypropyl cellulose, methenorescenellose, polycarbonate, poly Allylate, Polysulfone, Polyethylene terephthalate, Polyethylene naphthalate, Polyetherolsulfone, Polyphenylene sulfide, Polyphenylene oxide, Polyallylsulfone, Polyamide, Polyimide, Polyolefin, Polychlorinated butyl, Cellulose polymer, Norbornene resin Or various types of these binary and ternary copolymers, graft copolymers, and blends. These polymer materials become an oriented product (stretched film) by stretching or the like.
- liquid crystal polymer examples include various main chain types and side chain types in which a conjugated linear atomic group (mesogen) imparting liquid crystal alignment is introduced into the main chain or side chain of the polymer.
- main chain type liquid crystal polymer examples include a nematic orientation polyester liquid crystal polymer, a discotic polymer and a cholesteric polymer having a structure in which a mesogenic group is bonded at a spacer portion that imparts flexibility. It is done.
- side-chain liquid crystal polymers include polysiloxane, polyacrylate, polymetatalylate, or polymalonate as the main chain skeleton, and nematic alignment imparted via a spacer unit consisting of conjugated atomic groups as side chains. And those having a mesogenic moiety that is a unit force of a para-substituted cyclic compound.
- These liquid crystal polymers are, for example, liquid crystalline on the alignment surface such as those obtained by rubbing the surface of a thin film such as polyimide polybulal alcohol formed on a glass plate, or those obtained by obliquely vapor deposition of oxygen. This is done by developing and heat-treating the polymer solution.
- the elliptically polarizing plate and the reflective elliptical polarizing plate described above are obtained by laminating a polarizing plate or a reflective polarizing plate and a retardation plate in an appropriate combination.
- the elliptical polarizing plate or the like that can be formed can be formed by sequentially laminating them separately in the manufacturing process of the liquid crystal display device so as to be a combination of a (reflection type) polarizing plate and a retardation plate.
- an optical film such as an elliptically polarizing plate is advantageous in that it has excellent quality stability and lamination workability, and can improve the manufacturing efficiency of a liquid crystal display device.
- the visual compensation film is a film for widening the viewing angle so that the image can be seen relatively clearly even when the screen of the liquid crystal display device is viewed in a slightly oblique direction rather than perpendicular to the screen.
- a visual compensation phase difference plate for example, a phase difference plate, an alignment film such as a liquid crystal polymer, or a support in which an alignment layer such as a liquid crystal polymer is supported on a transparent substrate can be used.
- a normal retardation plate uses a polymer film having birefringence that is uniaxially stretched in the plane direction, whereas a retardation plate used as a visual compensation film is biaxially stretched in the plane direction.
- Birefringence such as a polymer film having a birefringence and a birefringence that has a controlled refractive index in the thickness direction that is uniaxially stretched in the plane direction and is also stretched in the thickness direction.
- a film or the like is used.
- the tilted alignment film include a film obtained by bonding a heat-shrink film to a polymer film and subjecting the polymer film to a stretch treatment or Z and shrink treatment under the action of the shrinkage force by heating, or a liquid crystal polymer that is obliquely oriented. Etc.
- the raw material polymer for the phase difference plate is the same as the polymer described in the previous phase difference plate, preventing coloration due to a change in the viewing angle based on the phase difference of the liquid crystal cell and expanding the viewing angle for good viewing. Anything suitable for the purpose can be used.
- liquid crystal polymer alignment layer particularly the optically anisotropic layer composed of the discotic liquid crystal polymer gradient alignment layer
- the triacetyl cellulose film is supported by the triacetyl cellulose film in order to achieve a wide viewing angle with good visibility.
- the optically compensated retardation plate can be preferably used.
- a polarizing plate in which a polarizing plate and a brightness enhancement film are bonded together is usually provided on the back side of the liquid crystal cell. It is provided and used.
- the brightness enhancement film reflects the linearly polarized light with a predetermined polarization axis or circularly polarized light in a predetermined direction when natural light is incident due to a backlight of a liquid crystal display device or the like, or reflection from the back side, and transmits other light.
- a polarizing plate in which a brightness enhancement film is laminated with a polarizing plate allows light from a light source such as a backlight to be incident to obtain transmitted light in a predetermined polarization state, and reflects light without transmitting the light other than the predetermined polarization state.
- the light reflected on the surface of the brightness enhancement film is further inverted through a reflective layer provided behind the brightness enhancement film and re-incident on the brightness enhancement film, and part or all of the light is transmitted as light having a predetermined polarization state.
- a reflective layer provided behind the brightness enhancement film and re-incident on the brightness enhancement film, and part or all of the light is transmitted as light having a predetermined polarization state.
- the light having a polarization direction that does not coincide with the polarization axis of the polarizer is It is almost absorbed by the polarizer and does not pass through the polarizer. That is, approximately 50% of the light that is different depending on the characteristics of the polarizer used is absorbed by the polarizer, and the amount of light that can be used for liquid crystal image display is reduced, and the image becomes dark.
- the brightness enhancement film allows light having a polarization direction that is absorbed by the polarizer to be reflected once by the brightness enhancement film without being incident on the polarizer, and further through a reflective layer or the like provided on the back side thereof.
- Inverting and re-entering the brightness enhancement film is repeated, and only the polarized light whose polarization direction is such that the polarization direction of the light reflected and inverted between the two can pass through the polarizer is obtained. Is transmitted to the polarizer so that light such as a backlight can be efficiently used for displaying images on the liquid crystal display device, and the screen can be brightened.
- a diffusion plate may be provided between the brightness enhancement film and the reflective layer.
- the polarized light reflected by the brightness enhancement film is directed to the reflection layer and the like, but the installed diffuser diffuses the light passing therethrough at the same time and simultaneously cancels the polarization state to become a non-polarized state. That is, the light in the natural light state is directed to the reflection layer and the like, is reflected through the reflection layer and the like, passes through the diffusion plate again, and reenters the brightness enhancement film.
- Uniform Can provide a bright screen.
- the number of repetitions of the initial incident light increased moderately, and combined with the diffusion function of the diffuser, it was possible to provide a uniform brightness V and display screen. It is done.
- a dielectric multilayer thin film or a multilayer laminate of thin film films having different refractive index anisotropy transmits linearly polarized light having a predetermined polarization axis and transmits other light.
- Appropriate ones such as those showing the characteristics to be used can be used.
- the transmitted light is directly incident on the polarization plate with the polarization axis aligned, thereby suppressing absorption loss due to the polarization plate.
- it can be transmitted efficiently.
- a brightness enhancement film of a type that transmits circularly polarized light such as a cholesteric liquid crystal layer
- it can be directly incident on a polarizer.
- the circularly polarized light is linearly polarized through a retardation plate in order to suppress absorption loss. It is preferable to make it light and make it enter into a polarizing plate. Note that circularly polarized light can be converted to linearly polarized light by using a 1Z4 wavelength plate as the retardation plate.
- a retardation plate that functions as a 1Z4 wavelength plate at a wide wavelength in the visible light region or the like exhibits, for example, a retardation plate that functions as a 1Z4 wavelength plate with respect to light-colored light having a wavelength of 55 Onm and other retardation characteristics. It can be obtained by a method of superposing a retardation layer, for example, a retardation layer functioning as a 1Z2 wavelength plate. Therefore, the retardation plate disposed between the polarizing plate and the brightness enhancement film may have a retardation layer force of one layer or two or more layers.
- the cholesteric liquid crystal layer also reflects circularly polarized light in a wide wavelength range such as a visible light castle by combining two or more layers with different reflection wavelengths and having an arrangement structure in which two or more layers are superimposed. Based on this, transmission circular polarization in a wide and wavelength range can be obtained.
- the polarizing plate may be formed by laminating a polarizing plate such as the above-described polarization-separating polarizing plate and two or more optical layers. Therefore, a reflective elliptical polarizing plate or a semi-transmissive elliptical polarizing plate in which the above-mentioned reflective polarizing plate or semi-transmissive polarizing plate and a retardation plate are combined may be used.
- An optical film in which the optical layer is laminated on a polarizing plate can be formed even in a method of laminating separately sequentially in a manufacturing process of a liquid crystal display device or the like. It has excellent quality stability and assembly work! /, And has the advantage of improving the manufacturing process of liquid crystal display devices.
- an appropriate adhesive means such as an adhesive layer can be used. When the polarizing plate and the other optical layer are bonded, their optical axes can be arranged at an appropriate angle depending on the target retardation characteristics.
- rubbing treatment is performed on the surface of the optical film 1 described above.
- a known method can be adopted.
- a labinda roll in which a rubbing cloth made of rayon, cotton, or nylon (for example, Y-19-R, manufactured by Yoshikawa Processing Co., Ltd.) is wound on a roll is rotated.
- the depth of the recess (indentation) formed by rubbing is preferably 0.2 to 1. Omm, more preferably 0.2 to 0.5 mm.
- the rotational speed of the rubbing roll is 500 to 2000 rpm.
- the force S is more preferably 1000 to 1700 rpm. If the rotational speed is less than 500 rpm, it tends to be difficult to uniformly rub the optical film surface. On the other hand, if it exceeds 2 OOOrpm, the optical film surface tends to be scratched. is there.
- the moving speed of the optical film is preferably 3 to: LOmZmin, more preferably 5 to 8 mZmin. If the moving speed is less than 3 mZmin, the appearance tends to be troubled. On the other hand, if it exceeds lOmZmin, the orientation of the conductive polymer and the binder component tends to decrease.
- the antistatic layer 2 is formed on the surface of the optical film subjected to the rubbing treatment with a coating solution containing a conductive polymer.
- the solid concentration of the coating solution is preferably adjusted to about 0.5 to 5% by weight.
- the coating solution can be applied onto an optical film using a coating method such as a roll coating method such as reverse coating or gravure coating, a spin coating method, a screen coating method, a fountain coating method, a dating method, or a spray method. And then dried to form an antistatic layer.
- a coating method such as a roll coating method such as reverse coating or gravure coating, a spin coating method, a screen coating method, a fountain coating method, a dating method, or a spray method.
- a coating method such as a roll coating method such as reverse coating or gravure coating, a spin coating method, a screen coating method, a fountain coating method, a dating method, or a spray method. And then dried to form an antistatic layer.
- an antistatic layer is formed on the optical film by the same method as described above without subjecting the optical film surface to a rubbing treatment, and then the rubbing treatment is performed on the formed antistatic layer surface by the same method as described above. You can give it!
- the thickness of the antistatic layer is preferably 5 to: LOOOnm.
- the thickness of the antistatic layer is usually 5000 nm or less as the point of reduction in optical characteristics. However, when the thickness of the antistatic layer is increased, the antistatic layer is not strong enough to break down due to insufficient strength. Adhesion may not be obtained.
- the thickness of the antistatic agent is preferably 500 nm or less, more preferably 300 nm or less, and even more preferably 200 nm or less. In order to ensure adhesion and suppress peeling charge, it is preferably 5 nm or more, and more preferably lOnm or more.
- the peeling charge effect is preferably that the antistatic layer is thicker, but it is less than or equal to 200 nm. From this point, it is preferable that the thickness is 5 to 500 nm, further 10 to 300 nm, and further 10 to 200 nm.
- the optical film 1 in forming the antistatic layer 2, can be subjected to an activation treatment.
- the activation treatment is effective when an aqueous solution containing a water-soluble conductive polymer is used as an antistatic agent, and repelling when applying the aqueous solution can be suppressed.
- the activation treatment is effective particularly when the optical film 1 is a polyolefin resin or a norbornene resin.
- the pressure-sensitive adhesive layer 3 is formed by laminating on the antistatic layer 2.
- the forming method is not particularly limited, and examples thereof include a method of applying a pressure-sensitive adhesive solution to the antistatic layer and drying, a method of transferring with a release sheet provided with a pressure-sensitive adhesive layer, and the like.
- the thickness of the pressure-sensitive adhesive layer is not particularly limited, but is preferably about 10 to 40 ⁇ m.
- Constituent materials of the release sheet include synthetic resin films such as paper, polyethylene, polypropylene, polyethylene terephthalate, rubber sheets, paper, cloth, nonwoven fabric, nets, foam sheets, metal foils, laminates thereof, and the like. Appropriate thin leaves and the like can be mentioned.
- the surface of the release sheet is subjected to low-adhesion release treatment such as silicone treatment, long-chain alkyl treatment, and fluorine treatment as necessary in order to enhance the peelability from the pressure-sensitive adhesive layer 3. Good.
- each layer such as an optical film and an adhesive layer of the antistatic adhesive optical film of the present invention includes, for example, a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, and a cyanoacrylate compound. Further, it may be one having an ultraviolet absorbing ability by a method such as a method of treating with an ultraviolet absorber such as a nickel complex compound.
- the antistatic pressure-sensitive adhesive optical film of the present invention can be preferably used for forming various image display devices such as a liquid crystal display device.
- the liquid crystal display device can be formed according to the conventional method.
- a liquid crystal display device generally has a force formed by appropriately assembling components such as a liquid crystal cell, an antistatic adhesive optical film, and an illumination system as necessary, and incorporating a drive circuit.
- the method can be based on the conventional method without any limitation except that the optical film according to the present invention is used.
- the liquid crystal cell for example, any type such as a TN type, STN type, or ⁇ type can be used.
- An appropriate liquid crystal display device such as a liquid crystal display device in which an antistatic adhesive optical film is disposed on one side or both sides of the liquid crystal cell, a backlight in the illumination system, or a reflector is used. Can do.
- the optical film according to the present invention can be placed on one or both sides of the liquid crystal cell. When optical films are provided on both sides, they may be the same or different.
- a single layer of appropriate parts such as a diffuser plate, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffuser plate, and a knocklight at an appropriate position. Or two or more layers can be arranged.
- an organic electroluminescence device (organic EL display device) will be described.
- the optical film (polarizing plate or the like) of the present invention can also be applied to an organic EL display device.
- an organic EL display device has a transparent electrode, an organic light emitting layer, and a metal electrode in order on a transparent substrate.
- a light emitter (organic electroluminescent emitter) is formed by laminating.
- the organic light emitting layer is a laminate of various organic thin films, for example, a laminate of a hole injecting layer having an isotropy such as a triphenylamine derivative and a light emitting layer having a fluorescent organic solid force such as anthracene. Or a laminate of such a light emitting layer and a perylene derivative or the like electron injection layer, or a stack of these hole injection layer, light emitting layer, and electron injection layer.
- the composition is known.
- an organic EL display device when a voltage is applied to a transparent electrode and a metal electrode, holes and electrons are injected into the organic light-emitting layer, and the energy generated by recombination of these holes and electrons is the same. Emits light on the principle that it excites the fluorescent material and emits light when the excited fluorescent material returns to the ground state.
- the mechanism of recombination in the middle is the same as that of a general diode, and as can be expected from this, the current and emission intensity show strong nonlinearity with rectification with respect to the applied voltage.
- an organic EL display device in order to extract light emitted from the organic light emitting layer, at least one of the electrodes must be transparent, and is usually formed of a transparent conductor such as indium tin oxide (ITO).
- ITO indium tin oxide
- a transparent electrode is used as the anode.
- metal electrodes such as Mg Ag and A1-Li are used.
- the organic light emitting layer is formed of a very thin film with a thickness of about lOnm. For this reason, the organic light emitting layer transmits light almost completely like the transparent electrode. As a result, light that is incident on the surface of the transparent substrate when not emitting light, passes through the transparent electrode and the organic light emitting layer, and is reflected by the metal electrode again returns to the surface side of the transparent substrate. When viewed, the display surface of the OLED display looks like a mirror.
- an organic EL display device including an organic electroluminescent light emitting device including a transparent electrode on the front surface side of an organic light emitting layer that emits light when voltage is applied and a metal electrode on the back surface side of the organic light emitting layer
- a polarizing plate can be provided on the surface side of the electrode, and a retardation plate can be provided between the transparent electrode and the polarizing plate.
- the retardation plate and the polarizing plate have a function of polarizing light incident from the outside and reflected by the metal electrode, the mirror surface of the metal electrode cannot be visually recognized from the outside by the polarization action. There is an effect that.
- the retardation plate is a 1Z4 wavelength plate and the angle between the polarization directions of the polarizing plate and the retardation plate is adjusted to ⁇ Z4, the mirror surface of the metal electrode can be completely shielded.
- linearly polarized light is generally elliptically polarized by the retardation plate, but it is circularly polarized when the retardation plate is a 1Z4 wavelength plate and the angle between the polarization direction of the polarizing plate and the retardation plate is ⁇ ⁇ 4. .
- This circularly polarized light is transmitted through the transparent substrate, the transparent electrode, and the organic thin film, is reflected by the metal electrode, is again transmitted through the organic thin film, the transparent electrode, and the transparent substrate, and is linearly polarized again on the retardation plate. Become. And since this linearly polarized light is orthogonal to the polarization direction of the polarizing plate, it cannot be transmitted through the polarizing plate. As a result, the mirror surface of the metal electrode can be completely shielded.
- a polybulal alcohol film with a thickness of 80 ⁇ m was stretched 5 times in an aqueous iodine solution at 40 ° C and then dried at 50 ° C for 4 minutes to obtain a polarizer.
- a triacetyl cellulose film was bonded to both sides of this polarizer using a polyvinyl alcohol adhesive to obtain a polarizing plate.
- a rubbing cloth made by rayon (manufactured by Yoshikawa Kogyo Co., Ltd.) is used as a roll, and a labinda roll is used. A rubbing treatment was performed on one side of the polarizing plate under the condition of a speed of 8 mZmin.
- aqueous solution containing a water-soluble polythiophene-based conductive polymer (Nagase Chemtex Co., Ltd., Denatron P-502RG, solid content concentration 0.8%) was applied to the rubbing treated surface of the polarizing plate, and the thickness after drying was 50 nm. And apply an antistatic layer by drying at 80 ° C for 2 minutes. Formed.
- the adhesive solution is applied on a release film (polyethylene terephthalate substrate: Diafoil MRF38, manufactured by Mitsubishi Chemical Polyester) by a reverse roll coating method so that the thickness after drying is 25 m.
- a release film was applied to the film and dried in a hot air circulation oven to form an adhesive layer.
- an antistatic adhesive polarizing plate On the antistatic layer of the antistatic polarizing plate, a release film on which the pressure-sensitive adhesive layer was formed was bonded to prepare an antistatic adhesive polarizing plate.
- a polybulal alcohol film with a thickness of 80 ⁇ m was stretched 5 times in an aqueous iodine solution at 40 ° C and then dried at 50 ° C for 4 minutes to obtain a polarizer.
- a polarizing plate was obtained by bonding a triacetyl cellulose film on both sides of this polarizer using a polyvinyl alcohol-based adhesive.
- aqueous solution containing a water-soluble polythiophene-based conductive polymer (Nagase Chemtex Co., Ltd., Denatron P-502RG, solid content concentration: 0.8%) on one side of the polarizing plate so that the thickness after drying is 50 nm. And dried at 80 ° C. for 2 minutes to form an antistatic layer. After that, a rayon rubbing cloth (manufactured by Yoshikawa Kogyo Co., Ltd.) is applied to the roll, and a labinda roll is used. The surface of the layer was rubbed.
- a rayon rubbing cloth manufactured by Yoshikawa Kogyo Co., Ltd.
- an antistatic adhesive polarizing plate On the antistatic layer of the antistatic polarizing plate, a release film on which the pressure-sensitive adhesive layer was formed was bonded to prepare an antistatic adhesive polarizing plate.
- Example 1 an adhesive polarizing plate was produced in the same manner as in Example 1 except that the antistatic layer was not applied.
- An antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that the optical film of Example 1 was subjected to a rubbing treatment on the polarizing plate.
- an antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that the rubbing angle with respect to the slow axis of the polarizing plate was changed to 0 ° force and 20 °.
- the prepared antistatic pressure-sensitive adhesive optical film or pressure-sensitive adhesive optical film was punched out to a size of 25 mm ⁇ 50 mm with a Thomson blade type, and bonded to the glass surface to obtain a sample.
- the light transmittance of the sample was measured using an integrating sphere type spectral transmittance measuring device (DOT-3, manufactured by Murakami Color Research Laboratory Co., Ltd.).
- the produced antistatic adhesive optical film or adhesive optical film was cut into a size of 100 mm ⁇ 10 Omm and attached to a liquid crystal panel.
- This panel was placed on a backlight with brightness of lOOOOcd, and 5kv of static electricity was generated using ESD (SANKI, ESD-801 2A) which is a static electricity generator, causing liquid crystal alignment disorder.
- ESD SANKI, ESD-801 2A
- the recovery time (seconds) of the display failure due to the orientation failure was measured using an instantaneous multiphotometric detector (MCPD-3000, manufactured by Otsuka Electronics Co., Ltd.). (Surface resistance value)
- the surface resistance value ( ⁇ Z port) of the antistatic layer was measured using a surface resistance measuring instrument (Hiresta MCP-HT450, manufactured by Mitsubishi Chemical Co., Ltd.) at an applied voltage of 500V.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Elimination Of Static Electricity (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/577,690 US8703297B2 (en) | 2004-10-21 | 2005-10-12 | Charge-preventing optical film, charge-preventing adhesive optical film, manufacturing method thereof, and image display device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-306983 | 2004-10-21 | ||
| JP2004306983A JP4346087B2 (ja) | 2004-10-21 | 2004-10-21 | 帯電防止性光学フィルム、帯電防止性粘着型光学フィルム、それらの製造方法および画像表示装置 |
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| Publication Number | Publication Date |
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| WO2006043451A1 true WO2006043451A1 (ja) | 2006-04-27 |
Family
ID=36202867
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2005/018767 Ceased WO2006043451A1 (ja) | 2004-10-21 | 2005-10-12 | 帯電防止性光学フィルム、帯電防止性粘着型光学フィルム、それらの製造方法および画像表示装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8703297B2 (ja) |
| JP (1) | JP4346087B2 (ja) |
| KR (1) | KR100861901B1 (ja) |
| CN (1) | CN100458467C (ja) |
| TW (1) | TWI408051B (ja) |
| WO (1) | WO2006043451A1 (ja) |
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| JP2018116243A (ja) * | 2017-01-20 | 2018-07-26 | 日東電工株式会社 | 偏光板 |
| CN110444110A (zh) * | 2019-08-14 | 2019-11-12 | 云谷(固安)科技有限公司 | 电子元件及显示装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100253886A1 (en) * | 2007-12-28 | 2010-10-07 | Kim Jee Woung | Polarizing film including antistatic coating layer |
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| CN110444110A (zh) * | 2019-08-14 | 2019-11-12 | 云谷(固安)科技有限公司 | 电子元件及显示装置 |
| CN110444110B (zh) * | 2019-08-14 | 2021-06-29 | 云谷(固安)科技有限公司 | 电子元件及显示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080044674A1 (en) | 2008-02-21 |
| KR100861901B1 (ko) | 2008-10-09 |
| US8703297B2 (en) | 2014-04-22 |
| JP2006119356A (ja) | 2006-05-11 |
| TW200630219A (en) | 2006-09-01 |
| CN100458467C (zh) | 2009-02-04 |
| JP4346087B2 (ja) | 2009-10-14 |
| CN101040198A (zh) | 2007-09-19 |
| KR20070062547A (ko) | 2007-06-15 |
| TWI408051B (zh) | 2013-09-11 |
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