WO2006043448A1 - 帯電防止性粘着型光学フィルム及び画像表示装置 - Google Patents
帯電防止性粘着型光学フィルム及び画像表示装置 Download PDFInfo
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- WO2006043448A1 WO2006043448A1 PCT/JP2005/018764 JP2005018764W WO2006043448A1 WO 2006043448 A1 WO2006043448 A1 WO 2006043448A1 JP 2005018764 W JP2005018764 W JP 2005018764W WO 2006043448 A1 WO2006043448 A1 WO 2006043448A1
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- antistatic
- optical film
- layer
- sensitive adhesive
- pressure
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Classifications
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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
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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
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
- G02B1/116—Multilayers including electrically conducting layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- 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
- 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
- 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
-
- 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
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- 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
- G02B1/11—Anti-reflection coatings
-
- 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
- G02B1/14—Protective coatings, e.g. hard 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
Definitions
- the present invention relates to an antistatic pressure-sensitive adhesive optical film in which an antistatic layer is laminated on at least one surface of an optical film, and an adhesive layer is further laminated on the antistatic layer.
- the present invention also relates to an image display device such as a liquid crystal display device, an organic EL display device, and a PDP using the antistatic adhesive optical film.
- the optical film include a polarizing plate, a retardation plate, an optical compensation film, a brightness enhancement film, and a laminate of these.
- 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. And when peeling off this surface protection film, static electricity generate
- the surface protection film is not only peeled off, but the same problem occurs due to friction between optical films depending on the manufacturing process and the usage method of consumers.
- an antistatic property is imparted to 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 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 antistatic adhesive optical film in which an antistatic layer is provided between the optical film and the adhesive layer has a problem of adhesive lack and adhesive residue, and reworkability.
- Patent Document 2 a method of incorporating a conductive substance into the adhesive layer has been proposed!.
- Patent Document 2 it is difficult to maintain the properties as the pressure-sensitive adhesive layer, and the stability is poor.
- the adhesive optical film is mounted by being attached to a liquid crystal panel.
- LCD panels are not limited to personal computer displays, but includes a wide range of mobile displays such as LCD TVs and mobile phones, and car parts such as car navigation and instrument panels. It is summer.
- the antistatic layer applied on the optical film is preferably water-based.
- the water resistance of the coating is very poor, especially in hot water immersion tests.
- Patent Document 3 As a method for increasing water resistance, a technique of blending an alkoxysilane having an epoxy group is disclosed (Patent Document 3). However, it cannot be expected to improve warm water resistance.
- 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. 2002-60736
- the present invention is an antistatic pressure-sensitive adhesive optical film in which an antistatic layer is laminated on at least one surface of an optical film, and an adhesive layer is further laminated on the antistatic layer, and has an antistatic effect.
- Another object of the present invention is to provide a film having excellent optical properties, adhesive properties, and appearance, excellent adhesion between the antistatic layer and the adhesive layer, and having good water resistance. It is another object of the present invention to provide a product that has excellent water resistance and has excellent durability that does not cause problems such as peeling or foaming in a humid heat environment. It is another object of the present invention to provide an image display device using the antistatic adhesive optical film.
- an antistatic layer is laminated on at least one surface of an optical film, and an adhesive layer is further laminated on the antistatic layer, and the antistatic layer is used as a raw material component.
- the present invention relates to an antistatic pressure-sensitive adhesive optical film characterized by containing a conductive polymer and a crosslinking agent.
- an antistatic layer containing a conductive polymer and a cross-linking agent as raw material components between the optical film and the pressure-sensitive adhesive layer, the antistatic effect, optical properties, adhesive properties, and appearance are excellent.
- an antistatic pressure-sensitive adhesive optical film having excellent adhesion between the antistatic layer and the pressure-sensitive adhesive layer and having good water resistance is obtained.
- the antistatic layer is provided between the optical film and the pressure-sensitive adhesive layer, static electricity due to peeling of the surface protective film, which has a good antistatic effect, or static electricity due to friction of the optical film. Occurrence can be suppressed, and circuit breakage and liquid crystal alignment failure can be prevented.
- the adhesiveness with the adhesive layer can be improved by forming the antistatic layer with the raw material. As a result, when handling an antistatic adhesive optical film, it is possible to significantly reduce adhesive loss due to contact with the film edge and adhesive residue when reworking from a liquid crystal panel. The handling property of the adhesive optical film can be improved.
- the conductive polymer is crosslinked and cured, whereby an antistatic layer having excellent water resistance is obtained.
- the crosslinking agent is at least one selected from the group consisting of a melamine crosslinking agent, a polycarpositimide crosslinking agent, a polyoxazolidine crosslinking agent, a polyepoxy crosslinking agent, and a polyisocyanate crosslinking agent. It is preferable that it is a kind of organic type crosslinking agent.
- the conductive polymer is preferably water-soluble or water-dispersible.
- the water-soluble or water-dispersible conductive polymer is preferably a polythiophene-based conductive polymer.
- the antistatic layer preferably further contains a binder component as a raw material component.
- a binder component is at least one selected from the group consisting of polyurethane resins, polyester resins and acrylic resins. It is preferable that
- the pressure-sensitive adhesive layer is preferably formed of an acrylic pressure-sensitive adhesive.
- the first aspect of the present invention is a method for producing the antistatic pressure-sensitive adhesive optical film, wherein a coating liquid containing a conductive polymer and a crosslinking agent is applied to at least one surface of the optical film, Furthermore, the present invention relates to a method for producing an antistatic adhesive optical film, comprising a step of forming an antistatic layer by crosslinking and curing, and a step of forming an adhesive layer on the antistatic layer.
- the first aspect of the present invention is 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 a polymer layer, coating a coating solution containing a crosslinking agent on the polymer layer, and crosslinking the at least the conductive polymer in the polymer layer to form an antistatic layer; And a method for producing an antistatic pressure-sensitive adhesive optical film, comprising a step of forming a pressure-sensitive adhesive layer on the antistatic layer.
- an antistatic layer is laminated on at least one surface of an optical film, and an adhesive layer is further laminated on the antistatic layer.
- the present invention relates to an antistatic pressure-sensitive adhesive optical film characterized by containing 10 to 250 parts by weight of a crosslinking reaction type water-soluble compound with respect to 100 parts by weight of a water-soluble or water-dispersible conductive polymer as a component.
- the antistatic layer is provided between the optical film and the pressure-sensitive adhesive layer, static electricity due to peeling of the surface protective film, which has a good antistatic effect, or static electricity due to friction of the optical film. Occurrence can be suppressed, and circuit breakage and liquid crystal alignment failure can be prevented.
- a crosslinking reaction type water-soluble compound (binder component) is used as a raw material component of the antistatic layer with respect to 100 parts by weight of the conductive polymer.
- the crosslinking reaction type water-soluble compound forms a three-dimensional network structure by the crosslinking reaction and cures, so that the water resistance and durability are maintained without impairing the optical characteristics and the antistatic effect.
- An improved antistatic adhesive optical film is obtained.
- the blending amount of the crosslinking reaction type water-soluble compound is less than 10 parts by weight, the effect of improving water resistance is poor, while when it exceeds 250 parts by weight, the antistatic effect is poor.
- the water-soluble or water-dispersible conductive polymer is preferably a polythiophene-based conductive polymer.
- the water-soluble cross-linking reaction type compound as the binder component is at least one selected from the group consisting of epoxy resin, melamine-formalin resin, and urea-formalin resin. Is preferred.
- the pressure-sensitive adhesive layer is preferably formed of an acrylic pressure-sensitive adhesive.
- the present invention relates to an image display device using at least one antistatic pressure-sensitive adhesive optical film.
- the antistatic pressure-sensitive adhesive optical film of the present invention is used in combination of one or more sheets 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 pressure-sensitive 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 layer 2 of the antistatic pressure-sensitive adhesive optical film of the first invention is formed by a reaction cured product of a conductive polymer as an antistatic agent and a crosslinking agent.
- the antistatic layer 2 of the antistatic pressure-sensitive adhesive optical film of the second invention is used as a raw material component. And a water-soluble or water-dispersible conductive polymer and a crosslinking reaction type water-soluble compound.
- the conductive polymer a polymer having good optical characteristics, appearance, antistatic effect and antistatic effect when heated and humidified is used.
- a conductive polymer 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.
- the water-soluble conductive polymer is water-soluble when 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. That's right.
- 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 (manufactured by Nagase Chemtech, Denatron series).
- the crosslinking agent to be used is not particularly limited, but a melamine crosslinking agent, a polycarpositimide crosslinking agent, a polyoxazolidine crosslinking agent, a polyepoxy crosslinking agent, and a polyisocyanate crosslinking agent are used. It is preferable to use at least one organic crosslinking agent selected from the group consisting of crosslinking agents. In particular, it is preferable to use a melamine-based crosslinking agent.
- the crosslinking agent is preferably used in an amount of 0.001 to 5 parts by weight based on 100 parts by weight of the conductive polymer, more preferably 0.01 to 1 part by weight, and particularly preferably 0.1 to 1 part by weight. is there.
- the amount of the crosslinking agent used is less than 0.001 part by weight, the conductive polymer or the like is not sufficiently crosslinked, and the adhesion between the antistatic layer and the pressure-sensitive adhesive layer and the water resistance tend to decrease. .
- it exceeds 5 parts by weight the storage stability of the coating solution tends to be lowered.
- a binder component As a material for forming the antistatic layer, it is preferable to use a binder component together for the purpose of improving the film forming property of the antistatic agent and the adhesion to the optical film.
- a water-soluble conductive polymer or a water-dispersible conductive polymer is used as the antistatic agent, it is preferable to use a water-soluble or water-dispersible binder component.
- a noinder component For example, polyurethane resin, polyester resin, acrylic resin, polyether resin, cellulose resin, polybutyl alcohol resin, epoxy resin, polyvinylpyrrolidone, polystyrene resin Examples thereof include fats, polyethylene glycol, and pentaerythritol.
- binder components can be used alone or in combination of two or more as appropriate.
- the amount of binder component used depends on the type of conductive polymer. Usually, it is preferably 10 to 500 parts by weight, more preferably 10 to 40 parts by weight, based on 100 parts by weight of the conductive polymer. Particularly preferred is 10 to 300 parts by weight.
- the cross-linking reaction type water-soluble compound as the noinder component is a monomer, oligomer, or polymer that is soluble in water before the cross-linking reaction, and Any compound that forms a three-dimensional network structure after crosslinking reaction and becomes insoluble in water, such as two-component reactive water-soluble epoxy resin, melamine formalin resin, and urea formalin resin. It is done. These may be used alone or in combination of two or more.
- the two-component reaction type water-soluble epoxy resin comprises a water-soluble polyfunctional epoxy resin and a water-soluble curing agent as main components, and by mixing both, an addition-type crosslinking reaction occurs. It forms a dimensional polymer network.
- water-soluble polyfunctional epoxy resins include triglycidyl isocyanurate, sorbitol polyglycidyl ether, (poly) dalicerol polyglycidyl ether, (poly) ethylene glycol diglycidyl ether, and (poly) propylene glycol diglycidyl.
- examples thereof include aliphatic glycidyl ethers such as ethers and alicyclic glycidyl ethers such as sorbitan polyglycidyl ethers.
- examples of water-soluble curing agents include aliphatic polyamines such as diethylenetriamine, triethylenetetramine, and polyamidoamine, imidazoles such as 2-methylimidazole and 2-ethyl-4-methylimidazole, and benzyl.
- examples include tertiary amines such as dimethylamine, acid anhydrides such as methyl hymic anhydride and phthalic anhydride, and Lewis acids such as boron trifluoride.
- Urea-formalin or melamine-formalin is obtained by subjecting an initial prepolymer obtained by addition reaction of urea and formaldehyde or melamine and formaldehyde to a dehydration condensation reaction.
- the initial prepolymer include fenore and benzoguanamine. It may be modified with Examples of the commercial products of the initial prepolymers include the Euramin series (Mitsui Chemicals) and the Yucarac series (Sanwa Chemical Co., Ltd.).
- the amount of the crosslinking reaction type water-soluble compound is 10 to 100 parts by weight with respect to 100 parts by weight of the conductive polymer.
- binder component As a material for forming the antistatic layer, other noinder components may be used in combination for the purpose of improving the film forming property of the antistatic agent and the adhesion to the optical film. 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, polyvinyl alcohol-based resins, polyvinylpyrrolidone, and polystyrene-based resins. Polyethylene glycol, pentaerythritol and the like. Polyurethane-based resin, polyester-based resin, and acrylic-based resin are particularly preferable.
- One or more of these other binder components can be used according to the intended use.
- the amount of the other binder component used depends on the type of conductive polymer. Usually, it is 5 to: LOO parts by weight, preferably 10 to 50 parts by weight per 100 parts by weight of the conductive polymer.
- the surface resistance value of the antistatic layer is preferably 1 ⁇ 10 12 ⁇ or less and more preferably IX 10 U Q / port or less. If the surface resistance exceeds 1 ⁇ 10 12 ⁇ , static electricity is generated due to the peeling of the surface protection film or the friction of the optical film with insufficient antistatic function. It may cause orientation failure.
- the pressure-sensitive adhesive 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. In particular, 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 has an alkyl (meth) acrylate monomer unit as the main skeleton.
- An acrylic polymer is used as a base polymer.
- (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.
- One or more kinds of monomers are introduced into the acrylic polymer 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% by weight.
- 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 acrylic polymer can be produced by various known methods. 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-based pressure-sensitive adhesive include natural rubber, isoprene-based rubber, styrene-butadiene-based rubber, recycled rubber, polyisobutylene-based rubber, and styrene-based rubber. Soprene-styrene rubber, styrene-butadiene-styrene 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).
- Sarasako uses the pressure-sensitive adhesive, if necessary, a tackifier, plasticizer, glass fiber, glass beads, metal powder, other inorganic powders, fillers, pigments, colorants, Fillers, antioxidants, ultraviolet absorbers, silane coupling agents, and the like, and various additives can be appropriately used within the range V and without departing from the object of the present invention. 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.
- polarizers include polybulal alcohol film and partially formalized polybulal alcohol film. , Uniaxially stretched by adsorbing a dichroic substance such as iodine or a dichroic dye on a hydrophilic polymer film such as a partially conjugated film of ethylene / ethylene acetate copolymer copolymer Polyethylene oriented films such as dehydrochlorinated products of vinyl 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 by immersing it 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 the 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-based polymers such as polyethylene terephthalate and polyethylene naphthalate
- cenorelose-based polymers such as dicetinoresenolose and triacetinoresenellose
- acrylic polymers such as polymethylmetatalylate, polystyrene
- examples include styrene polymers such as styrene copolymers (AS resin) and polycarbonate 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.
- the thickness direction retardation (Rth) is more preferably from 80 nm to +60 nm, and particularly preferably from 70 nm to +45 nm.
- a cellulose-based 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, etc. It can be illustrated.
- 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 anti-glare.
- the hard coat treatment is performed for the purpose of preventing the surface of the polarizing plate from being scratched.
- curing with excellent UV hardness curable resin such as acrylic and silicone is excellent in hardness and sliding properties. 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 per 100 parts by weight of the transparent resin forming the surface fine concavo-convex structure, and 5 to 25 parts by weight 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, and as a separate optical layer from the transparent protective film. 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 are optical properties alone. In addition to being used as a film, it may be laminated on the polarizing plate for practical use, and one layer or two or more layers may be used.
- a reflective polarizing plate or a 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 a 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 of a type that reflects and displays incident light from the viewing side (display side).
- a liquid crystal display device of a type that reflects and displays incident light from the viewing side (display side).
- 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 deposition film made of a reflective metal such as aluminum on one surface 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 reflective layer having a fine concavo-convex structure reflecting the surface fine concavo-convex structure of the transparent protective film can be formed by, for example, applying the metal 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 It can be performed by a method of attaching directly to the.
- the reflecting plate can be used as a reflecting sheet in which a reflecting layer is provided on an appropriate film according to the transparent film, instead of the method of directly applying to the transparent protective film of the polarizing plate.
- 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 than the point of sustaining and avoiding the additional installation of a protective layer. That's right.
- 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. Further, the one having a controlled three-dimensional refractive index is preferable because it can compensate (prevent) coloring that occurs when the screen of the liquid crystal display device is viewed from an oblique direction.
- 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 tallylate, and hydroxy ethinore cellulose. , Hydroxypropyl cellulose, methenoresenololose, polycarbonate, polyarylate, polysulfone, polyethylene terephthalate, polyethylene naphthalate, polyetherenosulfone, polyphenylene sulfide, polyphenylene oxide, polyallylsulfone, polyamide, polyimide, polyolefin, poly Examples thereof include butyl chloride, cellulose-based polymers, norbornene-based resins, and various binary and ternary copolymers, graft copolymers, and blends thereof. 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 retardation plate may have an appropriate retardation according to the purpose of use, such as for the purpose of color compensation by birefringence of various wavelength plates or liquid crystal layers, compensation for vision, etc. It may be a laminate in which more than one kind of retardation plate is laminated to control optical characteristics such as retardation.
- the elliptically polarizing plate and the reflective elliptical polarizing plate 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.
- optical films such as elliptically polarizing plates are superior in terms of quality stability and lamination workability, etc. There is an advantage that efficiency can be improved.
- 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.
- a liquid crystal polymer alignment layer is supported by a 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 obtained by bonding a polarizing plate and a brightness enhancement film is usually used by being provided on the back side of the liquid crystal cell.
- 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. Is done.
- 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.
- Luminance can be improved by increasing the amount of light that can be used for liquid crystal display image display and the like by supplying polarized light that is difficult to generate.
- 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.
- the brightness of the display screen is maintained, and at the same time, uneven brightness of the display screen is reduced.
- 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 absorption loss due to the polarizing plate is suppressed by allowing the transmitted light to enter the polarizing plate with the polarization axis aligned. However, 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 other retardation characteristics and a retardation plate that functions as a 1Z4 wavelength plate with respect to, for example, light of wavelength 55 Onm. 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 in an overlapping structure. 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 in the 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.
- 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.
- a coating liquid containing at least a conductive polymer and a crosslinking agent is applied (and dried) on the optical film 1 described above, and charging is performed by further causing a crosslinking reaction between at least the conductive polymer and the crosslinking agent.
- This is a method for forming the prevention layer 2.
- the solid content concentration of the coating solution is preferably adjusted to about 0.5 to 5% by weight.
- the coating solution is applied onto the optical film 1 using a coating method such as a reverse coating, a roll coating method such as gravure coating, a spin coating method, a screen coating method, a fountain coating method, a dating method, or a spray method. Apply to, then crosslink and cure to form an antistatic layer
- the storage stability of the coating solution may deteriorate.
- a coating liquid containing a conductive polymer (and a binder component) is coated on the optical film 1 (and dried) to form a polymer layer.
- a coating solution containing a crosslinking agent is applied (and dried) on the polymer layer, and the conductive polymer (and the binder component) in the polymer layer and the crosslinking agent are subjected to a bridge reaction to thereby prevent the antistatic layer.
- the amount of the crosslinking agent in the coating solution is preferably 0.01 to 5% by weight, more preferably 0.1 to 5% by weight.
- the coating method a method similar to the above can be appropriately selected.
- the antistatic layer 2 is formed from a cured product of a coating solution containing a water-soluble or water-dispersible conductive polymer and a crosslinking reaction-type water-soluble compound in the above-mentioned mixing ratio.
- the solid concentration of the coating solution is preferably adjusted to about 0.5 to 5% by weight.
- the coating solution is applied onto the optical film 1 by 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.
- the antistatic layer is formed by drying, and further crosslinking or curing the crosslinking reaction type water-soluble compound by heating or light irradiation.
- the crosslinking reaction type water-soluble compound may be crosslinked and cured at the time of drying.
- the crosslinking reaction type water-soluble compound is partially crosslinked, and the crosslinking reaction is completed when the pressure-sensitive adhesive layer is subsequently formed.
- the adhesion between the antistatic layer and the pressure-sensitive adhesive layer can be improved.
- the antistatic layer preferably has a thickness of 5 to: LOOOnm.
- the thickness of the antistatic layer is such that the point of reduction in optical characteristics is usually 5000 nm or less.When the antistatic layer is thick, sufficient adhesion is likely to occur in the antistatic layer due to insufficient strength of the antistatic layer. Sexuality 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 and charging, the thickness is preferably 5 nm or more, more preferably lOnm or more.
- the peeling charging effect is preferred when the thickness of the antistatic layer is thicker, but it is less than or equal to 200 nm. From the point of strength, it is preferably 5 to 500 nm, more preferably 10 to 300 nm, and even more preferably 10 to 200 nm.
- the optical film 1 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. Suitable thin leaf bodies 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. , Nickel complex compounds, etc. It may be one having an ultraviolet absorbing ability by a method such as a method of treating with an ultraviolet absorber.
- the adhesion between the antistatic layer 2 and the pressure-sensitive adhesive layer 3 is preferably 10 NZ25 mm or more, more preferably 15 NZ25 mm or more at a peeling angle of 180 ° and a peeling speed of 300 mm Zmin. If the adhesive strength is less than 10NZ25mm, adhesive residue may be generated when the optical film is peeled off from the liquid crystal panel, or peeling may occur in a heated and humidified environment.
- the antistatic pressure-sensitive adhesive optical film of the present invention can be preferably used for forming various image display devices such as liquid crystal display devices.
- 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 a liquid crystal cell, or a backlight in a lighting system or a reflector is formed. 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.
- a transparent electrode, an organic light emitting layer, and a metal electrode are sequentially laminated on a transparent substrate to form a light emitter (organic electroluminescent light emitter).
- the organic light emitting layer is a laminate of various organic thin films, for example, a laminate of a hole injecting layer having a triphenylamine derivative and the like and a light emitting layer having a fluorescent organic solid force such as anthracene.
- Body there are various configurations such as a laminate of such a light-emitting layer and an electron injection layer having the same strength as a perylene derivative, or a laminate of these hole injection layer, light-emitting layer, and electron injection layer.
- a laminate of such a light-emitting layer and an electron injection layer having the same strength as a perylene derivative or a laminate of these hole injection layer, light-emitting layer, and electron injection layer.
- an organic EL display device by applying a voltage 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.
- the 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 a 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 effect of preventing the mirror surface of the metal electrode from being visually recognized by the polarization action. is there.
- 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. In other words, only the linearly polarized light component of the external light incident on the organic EL display device is transmitted through the polarizing plate.
- This 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.
- An aqueous solution having a solid content concentration of 0.5% was prepared using a water-soluble polythiophene-based conductive polymer and a melamine-based crosslinking agent.
- the aqueous solution was applied to one side of a polarizing plate (manufactured by Nitto Denko, SEG5425DU) so that the thickness after drying was lOOnm, dried at 100 ° C. for 3 minutes and bridge-cured to form an antistatic layer.
- the pressure-sensitive adhesive solution was applied on a polyethylene terephthalate film (thickness 38 ⁇ m) that had been subjected to silicon release treatment by a reverse roll coating method so that the thickness after drying was 25 m.
- a polyethylene terephthalate film was applied thereon and dried in a hot air circulation oven to form an adhesive layer.
- a polyethylene terephthalate film on which an adhesive layer was formed was bonded to prepare an antistatic adhesive polarizing plate. Further, a surface protective film (release sheet: polyethylene terephthalate (thickness 38 ⁇ m), pressure-sensitive adhesive layer: acrylic pressure-sensitive adhesive (thickness 20 ⁇ m)) was bonded to the other side of the polarizing plate.
- An aqueous solution having a solid content concentration of 0.5% was prepared using a water-soluble polythiophene conductive polymer, a polyester resin as a binder, and a melamine crosslinking agent.
- the aqueous solution was applied to one side of a polarizing plate (manufactured by Nitto Denko, SEG5425DU) so that the thickness after drying was lOOnm, dried at 100 ° C. for 3 minutes, and cured by crosslinking to form an antistatic layer.
- An antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1.
- An aqueous solution having a solid content concentration of 0.5% was prepared using a water-soluble polythiophene conductive polymer and a polyester resin as a binder.
- the aqueous solution was applied to one side of a polarizing plate (manufactured by Nitto Denko, SEG5425DU) so that the thickness after drying was lOOnm, and dried at 80 ° C. for 2 minutes to form a polymer layer.
- an aqueous solution containing melamine-based crosslinking agent (solid concentration: 1%) was applied on the polymer layer so that the thickness after drying was 10 nm, and dried and crosslinked and cured at 100 ° C. for 1 minute. Thus, an antistatic layer was formed.
- an antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that a melamine-based crosslinking agent was used.
- an antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 2 except that a melamine-based crosslinking agent was used.
- the produced antistatic adhesive optical film was cut into a width of 25 mm and a length of 50 mm.
- the adhesive layer surface and the surface of the 50 ⁇ m thick polyethylene terephthalate film were bonded so that the deposited surface of the evaporated film of indium tin oxide was in contact with each other, then for 20 minutes or more, 23 ° CZ60% RH Left in the environment. After that, peel off the end of the polyethylene terephthalate film by hand, and confirm that the adhesive is attached to the polyethylene terephthalate film side.
- the tensile tester (manufactured by Shimadzu Corporation, Autograph AG-1) was used to measure the adhesion (NZ25mm) between the antistatic layer and the pressure-sensitive adhesive layer at room temperature (25 ° C) with 180 ° peeling and a tensile speed of 300mmZmin.
- the strong adhesion (NZ25mm) is preferably 15NZ25mm or more.
- the produced antistatic adhesive optical film was cut into a width of 25 mm and a length of 50 mm.
- the adhesive layer surface and the 50 ⁇ m-thick polyethylene terephthalate film surface were bonded so that the deposited surface of the deposited film of indium oxide and tin oxide was in contact with it, and then placed in an environment of 60 ° CZ90% RH. Left for 24 hours. Thereafter, adhesion (NZ25 mm) was measured in the same manner as in the above test.
- the strong adhesion (NZ25mm) is preferably 15NZ25mm or more.
- the produced antistatic adhesive optical film was cut into a size of 100 mm X 100 mm and attached to a liquid crystal panel. This panel was placed on a backlight with a brightness of lOOOOcd, and 5kv of static electricity was generated using ESD (SANKI, ESD-8012A), a static electricity generator, which caused liquid crystal alignment disorder. .
- ESD SANKI, ESD-8012A
- the recovery time (seconds) for the display failure due to the orientation failure was measured using an instantaneous multiphotometric detector (MCPD-3000, manufactured by Otsuka Electronics Co., Ltd.).
- the surface resistance value ( ⁇ Z port) of the antistatic layer was measured at an applied voltage of 500 V using a surface resistance measuring instrument (Hiresta MCP-HT450, manufactured by Mitsubishi Chemical Co., Ltd.).
- a 80 ⁇ m thick polyvinyl alcohol film 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 adhering a triacetyl cellulose film on both sides of the polarizer using a polybulal alcohol adhesive.
- a release sheet Mitsubishi Polyester Polyester, Diafoil MRF38, polyethylene terephthalate base material
- a reverse roll coating method so that the thickness after drying is 25 m
- a release sheet was applied thereon and dried in a hot air circulating oven to form an adhesive layer.
- a release sheet having a pressure-sensitive adhesive layer was bonded, and this was aged at room temperature for 1 week to prepare an antistatic adhesive polarizing plate.
- Example 1 In the formation of the antistatic layer of Example 1, the sorbitol polyglycidyl ether epoxy resin was changed from 4 parts to 1.2 parts, and 2 ethyl-4-methylimidazole was changed from 0.2 parts. 0. Antistatic adhesive mold in the same way as in Example 1 except for changing to 1 part A polarizing plate was produced.
- Example 1 except that 8 parts of melamine formaldehyde prepolymer (Mitsui Igaku Co., Ltd., Eulamin P-6300, solid content 50%) was used as the crosslinking reaction type water-soluble compound in the formation of the antistatic layer of Example 1.
- An antistatic adhesive polarizing plate was prepared in the same manner as in 1.
- Example 1 In the formation of the antistatic layer of Example 1, an antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that the crosslinking reaction type water-soluble compound was not used.
- Example 1 In the formation of the antistatic layer of Example 1, a non-crosslinkable polyester resin aqueous dispersion (manufactured by Nagase Chemtex Co., Ltd., Kabsen ES-210, solid content 25%) instead of the crosslinking reaction type water-soluble compound 16 parts
- An antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that was used.
- Example 1 In the formation of the antistatic layer of Example 1, the sorbitol polyglycidyl ether-based epoxy resin was changed to 0.2 part in 4 parts and 0.2 part of 2-ethyl-4-methylimidazole was changed from 0.2 part.
- An antistatic pressure-sensitive adhesive polarizing plate was produced in the same manner as in Example 1 except that the content was changed to 0.02 part.
- Example 1 In the formation of the antistatic layer of Example 1, the sorbitol polyglycidyl ether-based epoxy resin was changed from 4 parts to 12 parts, and the 2-ethyl 4-methylimidazole was changed from 0.2 parts to 0.5 parts.
- An antistatic adhesive-type polarizing plate was produced in the same manner as in Example 1 except that the part was changed to the part.
- the produced antistatic adhesive optical film was cut into a width of 25 mm and a length of 50 mm. This After adhering the adhesive layer surface to the 50 ⁇ m thick polyethylene terephthalate film surface so that the vapor deposition surface of the vapor deposited film of indium tin oxide was in contact with each other, 20 minutes or more, 23 ° CZ60% RH Left in the environment. After that, peel off the end of the polyethylene terephthalate film by hand, and confirm that the adhesive is attached to the polyethylene terephthalate film side.
- the tensile tester (manufactured by Shimadzu Corporation, Autograph AG-1) was used to measure the adhesion (NZ25mm) between the antistatic layer and the pressure-sensitive adhesive layer at room temperature (25 ° C) with 180 ° peeling and a tensile speed of 300mmZmin.
- the strong adhesion (NZ25mm) is preferably 15NZ25mm or more.
- the produced antistatic adhesive optical film was cut into a width of 25 mm and a length of 50 mm.
- the adhesive layer surface and the 50 ⁇ m-thick polyethylene terephthalate film surface were bonded so that the deposited surface of the deposited film of indium oxide and tin oxide was in contact with it, and then placed in an environment of 60 ° CZ90% RH. Left for 24 hours. Thereafter, adhesion (NZ25 mm) was measured in the same manner as in the above test.
- the strong adhesion (NZ25mm) is preferably 15NZ25mm or more.
- the prepared antistatic adhesive optical film was cut into a size of 100 mm ⁇ 100 mm to obtain a sample.
- the pressure-sensitive adhesive layer of the sample was attached to a glass plate and immersed in warm water of 40 ° C. for 10 hours, and then visually observed and evaluated according to the following criteria.
- the produced antistatic adhesive optical film was cut into a size of 100 mm X 100 mm 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 by using ESD (SANKI, ESD-8012A), which is a static electricity generator, causing liquid crystal alignment disorder. .
- ESD SANKI, ESD-8012A
- MCPD-3000 instantaneous multi-photometer detector
Abstract
Description
Claims
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JP2004-306947 | 2004-10-21 | ||
JP2004306953A JP4346086B2 (ja) | 2004-10-21 | 2004-10-21 | 帯電防止性粘着型光学フィルム及び画像表示装置 |
JP2004-306953 | 2004-10-21 | ||
JP2004306947A JP4367704B2 (ja) | 2004-10-21 | 2004-10-21 | 帯電防止性粘着型光学フィルム及び画像表示装置 |
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TW (1) | TWI421168B (ja) |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009258571A (ja) * | 2008-03-18 | 2009-11-05 | Daicel Chem Ind Ltd | 位相差フィルム |
EP3518008A4 (en) * | 2016-09-21 | 2019-10-09 | LG Chem, Ltd. | OPTICAL FILM HAVING EXCELLENT ANTISTATIC PROPERTY AND POLARIZING PLATE COMPRISING SAME |
CN111519465A (zh) * | 2020-03-24 | 2020-08-11 | 吉翔宝(太仓)离型材料科技发展有限公司 | 一种抗静电防油耐高温的特殊离型纸及其制备方法 |
US20200292941A1 (en) * | 2019-03-11 | 2020-09-17 | Shin-Etsu Chemical Co., Ltd. | Conductive polymer composition, coated product and patterning process |
KR20220066039A (ko) | 2019-09-20 | 2022-05-23 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 희토류 자석의 제조 방법 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5721448B2 (ja) * | 2010-01-21 | 2015-05-20 | 日東電工株式会社 | 透明フィルムおよびその利用 |
JP5885286B2 (ja) * | 2011-03-29 | 2016-03-15 | 日東電工株式会社 | 粘着シートおよびその利用 |
KR101883518B1 (ko) * | 2011-04-15 | 2018-07-30 | 닛토덴코 가부시키가이샤 | 점착 시트 |
JP6742723B2 (ja) * | 2015-01-16 | 2020-08-19 | 日東電工株式会社 | 表面保護フィルム、及び、光学部材 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1191038A (ja) * | 1997-07-24 | 1999-04-06 | Sumitomo Chem Co Ltd | 帯電防止板 |
JP2003080639A (ja) * | 2001-09-11 | 2003-03-19 | Mitsubishi Polyester Film Copp | フィルム |
Family Cites Families (1)
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TWI269709B (en) * | 2001-12-06 | 2007-01-01 | Toray Industries | Laminated film and process for producing laminated film |
-
2005
- 2005-10-12 KR KR1020077008802A patent/KR20070054250A/ko not_active Application Discontinuation
- 2005-10-12 WO PCT/JP2005/018764 patent/WO2006043448A1/ja active Application Filing
- 2005-10-12 KR KR1020087015161A patent/KR20080074993A/ko active Search and Examination
- 2005-10-20 TW TW094136758A patent/TWI421168B/zh active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1191038A (ja) * | 1997-07-24 | 1999-04-06 | Sumitomo Chem Co Ltd | 帯電防止板 |
JP2003080639A (ja) * | 2001-09-11 | 2003-03-19 | Mitsubishi Polyester Film Copp | フィルム |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009258571A (ja) * | 2008-03-18 | 2009-11-05 | Daicel Chem Ind Ltd | 位相差フィルム |
EP3518008A4 (en) * | 2016-09-21 | 2019-10-09 | LG Chem, Ltd. | OPTICAL FILM HAVING EXCELLENT ANTISTATIC PROPERTY AND POLARIZING PLATE COMPRISING SAME |
JP2019532323A (ja) * | 2016-09-21 | 2019-11-07 | エルジー・ケム・リミテッド | 帯電防止性に優れた光学フィルムおよびこれを含む偏光板 |
US20200292941A1 (en) * | 2019-03-11 | 2020-09-17 | Shin-Etsu Chemical Co., Ltd. | Conductive polymer composition, coated product and patterning process |
US11852974B2 (en) * | 2019-03-11 | 2023-12-26 | Shin-Etsu Chemical Co., Ltd. | Conductive polymer composition, coated product and patterning process |
KR20220066039A (ko) | 2019-09-20 | 2022-05-23 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 희토류 자석의 제조 방법 |
CN111519465A (zh) * | 2020-03-24 | 2020-08-11 | 吉翔宝(太仓)离型材料科技发展有限公司 | 一种抗静电防油耐高温的特殊离型纸及其制备方法 |
Also Published As
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KR20070054250A (ko) | 2007-05-28 |
TWI421168B (zh) | 2014-01-01 |
TW200628308A (en) | 2006-08-16 |
KR20080074993A (ko) | 2008-08-13 |
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