WO2008001601A1 - Film optique adhésif et dispositif d'affichage d'image - Google Patents
Film optique adhésif et dispositif d'affichage d'image Download PDFInfo
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- WO2008001601A1 WO2008001601A1 PCT/JP2007/061725 JP2007061725W WO2008001601A1 WO 2008001601 A1 WO2008001601 A1 WO 2008001601A1 JP 2007061725 W JP2007061725 W JP 2007061725W WO 2008001601 A1 WO2008001601 A1 WO 2008001601A1
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- WIPO (PCT)
- Prior art keywords
- optical film
- pressure
- sensitive adhesive
- film
- weight
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- 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
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- 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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- 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
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- 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
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- 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
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
- G02F1/133507—Films for enhancing the luminance
-
- 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
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- 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
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
Definitions
- the present invention relates to an adhesive optical film in which an adhesive layer is laminated on at least one surface of an optical film.
- the present invention also relates to an image display device such as a liquid crystal display device, an organic EL display device, or a PDP using the adhesive optical film.
- the optical film include a polarizing plate, a phase difference plate, an optical compensation film, a brightness enhancement film, and Sarakuko, which are laminated to form V.
- polarizing elements In a liquid crystal display device, it is indispensable to dispose polarizing elements on both sides of a liquid crystal cell because of its image forming method.
- various optical elements are being used for liquid crystal panels in order to improve display quality of displays. For example, a retardation plate for preventing coloring, 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.
- the adhesive is usually used.
- the adhesive between the optical film and the liquid crystal cell or the optical film is usually in close contact with each other using an adhesive in order to reduce the loss of light.
- the adhesive has an advantage that a drying step is not required to fix the optical film. Therefore, the adhesive is a pressure-sensitive adhesive optically provided in advance as an adhesive layer on one side of the optical film. Film is commonly used.
- Triacetyl cellulose film As a transparent protective film used for the polarizing plate, a triacetyl cellulose film has been awarded. However, triacetyl cellulose does not have sufficient resistance to heat and moisture, and if a polarizing plate using a triacetyl cellulose film as a transparent protective film is used at high temperature or high humidity, the performance of polarizing plate such as degree of polarization and hue There was a deficiency that would decrease. Triacetyl cellulose film has a phase with respect to incident light in an oblique direction. Make a difference. The powerful phase difference significantly affects the viewing angle characteristics as the size of liquid crystal displays increases in recent years.
- a cyclic olefin-based resin has been proposed as a material for the transparent protective film instead of triacetyl cellulose.
- Cyclic olefin fins have low moisture permeability and almost no phase difference in the oblique direction
- the adhesive optical film related to the polarizing plate using the cyclic olefin-based resin as the material of the transparent protective film is in a state of being bonded to the glass substrate because of the low moisture permeability of the cyclic olefin-based resin.
- foaming occurs in the durability to be left in a high temperature environment.
- the problem related to foaming was a problem that did not occur with triacetyl cellulose as a material for the transparent protective film.
- Patent Document 1 describes that foaming can be suppressed by controlling the saturated water absorption rate to a small value.
- foaming could not be suppressed simply by lowering the saturated water absorption rate.
- Patent Document 1 JP-A-9 281336
- the present invention is an adhesive optical film in which an adhesive layer is laminated on at least one surface of an optical film, and is formed of an optical film having a low moisture permeability, on the side on which the adhesive layer is laminated. It is an object of the present invention to provide a pressure-sensitive adhesive optical film that can suppress foaming in an environment that is highly durable in a high temperature environment.
- Another object of the present invention is to provide an image display device using the adhesive optical film.
- the present invention relates to an adhesive optical film in which an adhesive layer is laminated on at least one surface of an optical film.
- the pressure-sensitive adhesive layer has an equilibrium moisture content (a) of 0.5% by weight or less
- the equilibrium moisture content (a) is 0.02% by weight or more and the deviation amount (b) is 20 ⁇ m or more.
- the pressure-sensitive adhesive layer also controls the viewpoint power of the equilibrium moisture content (a) and the amount of deviation (b) related to the creep characteristics. In this way, by controlling the equilibrium moisture content (a) and the amount of deviation (b), even if the optical film force on the side where the pressure-sensitive adhesive layer is laminated is formed of a low moisture-permeable material. In addition, durability in a high temperature environment is increased, and foaming in such an environment can be suppressed.
- the pressure-sensitive adhesive layer has an equilibrium moisture content (a) of 0.5% by weight or less.
- the equilibrium moisture content (a) indicates the amount of water finally remaining in the adhesive layer, and the lower the amount of water finally remaining, the more effective the suppression of foaming.
- foaming in the durability test cannot be sufficiently suppressed even if the deviation (b) is controlled to be small.
- the deviation (b) related to creep characteristics is 600 ⁇ m or less.
- the amount of deviation (b) exceeds 600 m, even if the equilibrium moisture content (a) is controlled to be small, foaming cannot be sufficiently suppressed in the durability test.
- the pressure-sensitive adhesive layer of the present invention the equilibrium water fraction (a) and the deviation amount (b), as well as within these ranges, b ⁇ 1036.4 X e "5 - 124a, are controlled so as to satisfy
- the equilibrium moisture content (a) and the amount of deviation (b) are preferably controlled so that the deviation is small, but by controlling so as to satisfy the above relationship, in the durability test, Foaming can be suppressed.
- the equilibrium moisture content (a) is 0% by weight and the amount of deviation (b) Is O / zm.
- the equilibrium moisture content (a) is preferably 0.02% by weight or more, and more preferably 0.03% by weight or more in order to suppress inconvenience due to a decrease in adhesive strength (adhesive strength).
- the deviation (b) is preferably 20 ⁇ m or more. If the amount of misalignment (b) is too small, the liquid crystal panel force may cause a problem that the optical film may peel off in durability tests such as heat resistance and moisture resistance, even if the desired foaming can be suppressed.
- the amount of deviation (b) is more preferably 30 m or more, and further preferably 40 m or more.
- the pressure-sensitive adhesive layer preferably has a displacement amount (b) a force of 600 ⁇ m or less when the equilibrium moisture content (a) is 0.15% by weight or less.
- the deviation amount (b) is 300 mu m or less in gesture et preferred not more than 540 mu m, more 140 It is preferably not more than ⁇ m, more preferably less than 75 ⁇ m.
- the equilibrium moisture content (a) is preferably 0.13% by weight or less, more preferably 0.12% by weight or less, and further preferably 0.11% by weight or less.
- the amount of deviation (b) is It is preferably 350 / zm or less.
- the deviation (b) is preferably 240 m or less, and more preferably 130 / zm or less. Further, it is preferably less than 75 ⁇ m.
- the equilibrium moisture content (a) is preferably 0.23 wt% or less, more preferably 0.22 wt% or less, and even more preferably 0.21 wt% or less.
- the amount of deviation (b) is It is preferably 150 / zm or less.
- the deviation (b) is preferably 100 ⁇ m or less, and even less than 75 ⁇ m. It is preferable.
- the equilibrium moisture content (a) is preferably 0.45% by weight or less, more preferably 0.43% by weight or less.
- the pressure-sensitive adhesive layer has an equilibrium water content (a) of about 0.5% by weight or more and 0.25% by weight or less when the equilibrium water content (a) is 0.05% by weight or less.
- Deviation amount (b) Preferably satisfies b ⁇ -541.67a + 209.58. When this relationship is satisfied, it is particularly preferable for suppressing foaming in the durability test. In particular, it is preferable that the equation of the above relationship is satisfied when the equilibrium moisture content (a) is in the range of 0.07 to 0.22% by weight.
- the pressure-sensitive adhesive optical film is suitable when the optical film on the side where the pressure-sensitive adhesive layer is laminated has a moisture permeability of 1000 gZm 2 '24 h or less at 80 ° C and 90% RH.
- the present invention is effectively applied to the case of using a powerful low moisture permeability material and can suppress foaming in a durability test.
- the adhesive optical film can be suitably applied when the optical film is a polarizing plate provided with a transparent protective film on at least one surface of a polarizer.
- the moisture permeability at least on one side of the transparent protective film at 80 ° C. and 90% RH is 1000 gZm 2 ′ 24 h or less and an adhesive layer is laminated on the transparent protective film.
- the pressure-sensitive adhesive optical film as the pressure-sensitive adhesive layer, one formed of a pressure-sensitive adhesive containing an acrylic polymer and a crosslinking agent can be suitably used.
- the present invention also relates to an image display device using at least one adhesive optical film.
- the pressure-sensitive adhesive optical film of the present invention is used in combination of one or more depending on various usages of image display devices such as liquid crystal display devices.
- FIG. 1 is a diagram plotting the pressure-sensitive adhesive layer satisfying the scope of the present invention (Example) and not satisfying (Comparative Example).
- the pressure-sensitive adhesive optical film of the present invention is one in which a pressure-sensitive adhesive layer is laminated on at least one surface of the optical film.
- the pressure-sensitive adhesive layer may be provided on both sides of the optical film which may be provided on one side of the optical film.
- an appropriate pressure-sensitive adhesive that satisfies the value of the equilibrium moisture content (a), the value of the deviation amount (b), and the above relational expression can be used.
- Adhesives include rubber adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, vinyl alkyl ether adhesives, polyvinyl alcohol adhesives, polybutylpyrrolidone adhesives, polyacrylamide adhesives.
- Agent, cellulosic Examples include adhesives.
- pressure-sensitive adhesives those having excellent optical transparency, appropriate wettability, cohesiveness, and adhesive properties, and excellent weather resistance and heat resistance are preferably used.
- An acrylic pressure-sensitive adhesive is preferably used as a material exhibiting such characteristics.
- the acrylic pressure-sensitive adhesive is preferable in that the equilibrium moisture content (a) can be lowered and the amount of deviation (b) can be designed small.
- the acrylic pressure-sensitive adhesive has an acrylic polymer mainly composed of a monomer unit of (meth) acrylic acid alkyl ester as a base polymer.
- (meth) acrylic acid alkyl ester means acrylic acid alkyl ester and Z or methacrylic acid alkyl ester, and (meth) in the present invention has the same meaning.
- Examples of the (meth) acrylic acid alkyl ester constituting the main skeleton of the acrylic polymer include linear or branched alkyl groups having 1 to 20 carbon atoms.
- Illustrative examples include isonoyl (meth) acrylate, isomyristyl (meth) acrylate, and lauryl (meth) acrylate. These can be used alone or in combination.
- These alkyl groups preferably have an average carbon number of 3 to 9.
- the base polymer is an allyl polymer having a monomer unit of a highly hydrophobic alkyl (meth) acrylate as a main skeleton. And is preferred.
- (meth) acrylic acid alkyl esters include linear or branched alkyl group carbons from the viewpoints of optical transparency, moderate wettability and cohesion, adhesive strength, weather resistance and heat resistance. Those of formula 3-9, preferably 4-8 are preferably used in practice.
- these alkyl groups the larger the number of carbon atoms in the alkyl group, the higher the hydrophobicity, and the lower the equilibrium moisture content.
- Examples of strong (meth) acrylic acid alkyl esters include butyl (meth) acrylate and isooctyl (meth) acrylate. Of these, V ⁇ (meth) acrylate is preferred because of its high hydrophobicity.
- one or more kinds of copolymerization monomers can be introduced by copolymerization for the purpose of improving adhesiveness and heat resistance.
- copolymerized monomers examples include (meth) acrylic acid 2-hydroxyethyl, (meth) acrylic acid 2-hydroxypropyl, (meth) acrylic acid 4-hydroxybutyl, (meth) acrylic acid 6-hydroxyhexyl, ( Hydroxyl group-containing monomers such as 8 hydroxyoctyl (meth) acrylate, 10 hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate and (4-hydroxymethylcyclohexyl) monomethyl acrylate.
- Carboxylic group-containing monomers such as (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid; maleic anhydride, itaconic anhydride Acid anhydride group-containing monomers such as acrylic acid power products with prolatathon; styrene sulfone Sulfonic acid groups such as allylic sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid, (meth) acrylamide propane sulfonic acid, sulfopropyl (meth) acrylate, (meth) attaroyloxynaphthalene sulfonic acid Containing monomers; Phosphoric acid group-containing monomers such as 2-hydroxychetyl attalyloyl phosphate.
- 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.
- the proportion of the copolymerization monomer in the acrylic polymer is not particularly limited, but is preferably about 0 to 30%, more preferably about 0.1 to 15% in the weight ratio of all the constituent monomers. .
- hydroxyl group-containing monomers, carboxyl group-containing monomers, and acid anhydride group-containing monomers are preferably used from the viewpoints of adhesion to liquid crystal cells and durability for optical film applications. These monomers serve as reaction points with the crosslinking agent. Hydroxyl group-containing monomers, carboxyl group-containing monomers, acid anhydride monomers, etc. are highly reactive with intermolecular crosslinkers, so the force is preferably used to improve the cohesiveness and heat resistance of the resulting adhesive layer. In the case of having such a functional group, since the equilibrium moisture content (a) tends to be increased, it is preferable to use those having high reactivity with a small amount of copolymer having higher hydrophobicity.
- the hydroxyl group-containing monomer is preferably 4-hydroxybutyl (meth) acrylate, more preferably 6-hydroxyhexyl (meth) acrylate, rather than 2-hydroxyethyl (meth) acrylate.
- a hydroxyalkyl group having a large alkyl group it is preferable to use a hydroxyalkyl group having a large alkyl group.
- a hydroxyl group-containing monomer tends to increase the equilibrium moisture content (a), and therefore, when a hydroxyl group-containing monomer is used as a copolymerization monomer that is preferably used at a minimum.
- the ratio is preferably 0.01 to 5%, more preferably 0.01 to 3% in terms of the weight ratio of all the constituent monomers.
- a carboxyl group-containing monomer is used as a copolymerization monomer. When used, the proportion is preferably 0.01 to 10%, more preferably 0.01 to 7% in the weight ratio of all the constituent monomers.
- the copolymerization monomer it is preferable to use a copolymer monomer having high hydrophobicity from the viewpoint of controlling the equilibrium moisture content (a) to be low.
- a copolymer monomer having high hydrophobicity from the viewpoint of controlling the equilibrium moisture content (a) to be low.
- maleimide monomers and itacimide monomers are preferable as adhesive modification monomers because they have the property of hardly raising the equilibrium moisture content (a) of acrylic polymers obtained by copolymerizing these monomers. Used.
- 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, radical polymerization methods such as a Barta polymerization method, a solution polymerization method, and a suspension polymerization method can be appropriately selected.
- radical polymerization initiator various known azo-type and peroxide-type initiators 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.
- 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.
- examples of the organic crosslinking agent include an epoxy crosslinking agent, an isocyanate crosslinking agent, an imine crosslinking agent, and a peroxide crosslinking agent. These crosslinking agents can be used alone or in combination of two or more.
- an isocyanate crosslinking agent is preferable.
- isocyanate-based crosslinking agents are preferably used in combination with peroxide-based crosslinking agents.
- 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 give.
- the atom in the organic compound that is covalently or coordinately bonded include an oxygen atom, and the organic compound includes an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound, and a ketone compound.
- the mixing ratio of the base polymer such as the acrylic polymer and the crosslinking agent is not particularly limited! ,But Usually, the crosslinking agent (solid content) is preferably about 0.001 to 20 parts by weight, more preferably about 0.01 to 15 parts by weight with respect to 100 parts by weight of the base polymer (solid content).
- the crosslinking agent is preferably an isocyanate crosslinking agent or a peroxide crosslinking agent.
- the peroxide crosslinking agent is preferably about 0.02 to 2 parts by weight, more preferably about 0.05 to 1 part by weight, based on 100 parts by weight of the base polymer (solid content).
- the isocyanate chain cross-linking agent is preferably about 0.001 to 2 parts by weight, more preferably about 0.01 to 1.5 parts by weight with respect to 100 parts by weight of the base polymer (solid content).
- the isocyanate-based crosslinking agent and the peroxide-based crosslinking agent can be used within the above ranges, and can be preferably used in combination.
- Sarakuko has a tackifier, a plasticizer, glass fiber, glass beads, metal powder, other inorganic powders, a filler, a pigment, a colorant, and the like as necessary. 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
- a silane coupling agent is suitable, and the silane coupling agent (solid content) is preferably about 0.001 to LO parts by weight with respect to 100 parts by weight of the base polymer (solid content). Further, it is preferable to add about 0.005 to 5 parts by weight.
- the silane coupling agent those known in the past can be used without particular limitation.
- epoxy such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropinoletriethoxysilane, ⁇ -glycidoxypropylmethyljetoxysilane, 2- (3,4 epoxycyclohexyl) ethyltrimethoxysilane Group-containing silane coupling agent, 3-aminopropyltrimethoxysilane, ⁇ -2- (aminoethyl) 3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl- ⁇ - (1,3 dimethylbutylidene) propylamine
- Amino group-containing silane coupling agents such as 3-methacryloxypropyl trimethoxysilane, 3-methacryloxypropyl (meth) acrylic group-containing silane coupling agents such as 3-tricyanosilane, 3-isocyanatopropyltriethoxysilane, etc.
- Isocyanate group-containing silane It can
- the equilibrium moisture content (a) and the deviation (b) of the pressure-sensitive adhesive layer of the present invention satisfy the above range and relationship.
- the base monomer, the type of copolymerization monomer, the blending ratio thereof, the type of crosslinking agent, the blending amount, the type of additive, the blending amount, etc. are controlled. Can do.
- an acrylic polymer composed of a monomer unit having 3 to 9 carbon atoms of a linear or branched alkyl group that is often used in practice as an (meth) acrylic acid alkyl ester is used.
- an acrylic polymer with low cohesiveness is obtained, and the amount of deviation (b) tends to increase. is there.
- acrylic polymers using, for example, a carboxyl group-containing monomer such as acrylic acid as a copolymerization monomer are well known to greatly contribute to the improvement of cohesiveness of the formed adhesive layer.
- a base monomer for example, (meth) acrylic acid alkyl ester
- a copolymerization monomer are selected to prepare a base polymer, and the predetermined water content is controlled by controlling the saturated water content, the blending ratio thereof, and the degree of crosslinking.
- the pressure-sensitive adhesive layer is formed so as to satisfy the residual moisture content (a) and the deviation amount (b).
- An anchor coat layer may be provided between the pressure-sensitive adhesive layer of the pressure-sensitive adhesive optical film of the present invention and the optical film.
- the material for forming the anchor coat layer is not particularly limited, but it is desirable to form a film that exhibits good adhesion to both the adhesive layer and the optical film and has excellent cohesive strength.
- Various polymers, metal oxide sols, silica sols and the like can be used to exhibit such properties. Of these, polymers are particularly preferably used.
- Examples of the polymers include polyurethane-based resins, polyester-based resins, and amino acids in the molecule. And polymers containing groups.
- the polymer may be used in any of solvent-soluble, water-dispersed, and water-soluble types. Examples include water-soluble polyurethanes, water-soluble polyesters, water-soluble polyamides, and water-dispersible resins (ethylene-acetate butyl emulsion, (meth) acrylic emulsion, etc.).
- the water-dispersed type includes those obtained by emulsifying various types of resins such as polyurethane, polyester, polyamide, etc.
- emulsifiers and water-dispersible hydrophilic groups such as ionic groups, cationic groups, or groups.
- -A self-emulsified product by introducing an on-group can be used.
- An ionic polymer complex can also be used.
- the optical film used for the 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 kind thereof is not particularly limited. Force 80 ° C, 90% It is suitable for application where the water vapor permeability at RH is 1000gZm 2 '24h or less. The present invention is particularly suitable when the moisture permeability is 800 gZm 2 ′ 24 h or less, further 500 gZm 2 ′ 24 h or less, and further 200 gZm 2 ′ 24 h or less.
- Examples of the material having moisture permeability include polycarbonate polymers; arylate polymers; polyester polymers such as polyethylene terephthalate and polyethylene naphthalate; amide polymers such as nylon and aromatic polyamide; polyethylene Polyolefins such as polypropylene, ethylene'propylene copolymer, cyclo V, cyclic olefin-based resins having a norbornene structure, or a mixture thereof can be used.
- 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.
- Cyclic olefin-based resin is preferable.
- Cyclic olefin-based resin is a general generic name. For example, JP-A-3-14882 and JP-A-3-122137. It is described in the news.
- cyclic olefin-opening polymers, cyclic olefin addition polymers, random copolymers of cyclic olefin and ⁇ -olefins such as ethylene and propylene and these are modified with unsaturated carboxylic acids or their derivatives. Examples of such graft-modified products can be given.
- these hydrides are mentioned.
- the cyclic olefin is not particularly limited, and examples thereof include norbornene, tetracyclododecene, and derivatives thereof.
- examples of the products include ZEONEX and ZEONOR manufactured by ZEON CORPORATION, Arton manufactured by JSR, and TOPAS manufactured by TICONA.
- the material strength of the material having low moisture permeability is used as, for example, a transparent protective film for a polarizer, a retardation film, or the like.
- Examples of the optical film used in the pressure-sensitive adhesive optical film of the present invention include a polarizing plate.
- a polarizing plate having a transparent protective film on one or both sides of a polarizer is generally used.
- the polarizer is not particularly limited, and various types of polarizers can be used.
- polarizers include hydrophilic polymer films such as polyalcohol-based films, partially formalized polybulal alcohol-based films, and ethylene / acetic acid copolymer-based partially-coated films, and iodine and dichroic dyes.
- examples thereof include uniaxially stretched films adsorbed with dichroic materials, and polyene-based oriented films such as polyvinyl alcohol dehydrated products and polychlorinated cellulose dehydrochlorinated products.
- a polarizer having a dichroic substance power such as a polybutyl alcohol film and iodine is preferable.
- the thickness of these polarizers is not particularly limited, but is generally about 5 to 80 / zm.
- 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, or sodium chloride. Furthermore, if necessary, the polybulal alcohol film can be immersed in water and washed before dyeing. By washing the polybulal alcohol film with water, it is possible to clean the surface of the polybulal alcohol film and the anti-blocking agent.
- the stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be stretched and dyed with strong iodine. It can be stretched in an aqueous solution of boric acid or potassium iodide or in a water bath.
- 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.
- the transparent protective film of the low moisture permeability material is preferably applied to the side where the adhesive layer is bonded, while the other side is made of a material other than the low moisture permeability material, for example, Cellulose polymers such as diacetyl cellulose triacetyl cellulose, acrylic polymers such as polymethyl methacrylate, and styrene polymers such as polystyrene and acrylonitrile / styrene copolymer (AS resin).
- vinyl chloride polymer, imide polymer, snorephone polymer, polyetherenorenolephone polymer, polymer enoleenoleketone polymer, polyphenylene sulfide polymer, vinylol alcohol polymer, vinylidene chloride polymer, Vinyl butyral polymers, polyoxymethylene polymers, epoxy polymers, or blends of the polymers are examples of polymers that form the transparent protective film.
- the transparent protective film can also be formed as a cured layer of an acrylic, urethane, acrylic urethane, epoxy, silicone, or other thermosetting or ultraviolet curable resin.
- the thickness of the transparent 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.
- nx-nz is the refractive index in the slow axis direction in the film plane
- nz is the refractive index in the film thickness direction
- d is the film thickness.
- a transparent protective film having a thickness of ⁇ + 75 nm is preferably used.
- the thickness direction retardation value (Rth) is -90 ⁇ ! By using a film having a thickness of ⁇ + 75 nm, the coloring (optical coloring) of the polarizing plate due to the transparent protective film can be almost eliminated.
- the thickness direction retardation (Rth) is more preferably ⁇ 80 nm to +60 nm, and particularly preferably ⁇ 70 nm to +45 nm.
- the same polymer material is used on both sides. Even a transparent protective film made of the same may be used, or a protective film having a different polymer material strength may be used.
- the polarizer and the transparent protective film are usually in close contact via an aqueous adhesive or the like.
- water-based adhesives include isocyanate-based adhesives, polybulal alcohol-based adhesives, gelatin-based adhesives, bull-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. For example, curing with excellent UV-curing properties such as acrylic and silicone, excellent in hardness and sliding properties, etc. 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 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 diffusing layer, the antiglare layer, and the like can be provided on the transparent protective film itself, and a transparent protective film is additionally provided as an optical layer. It can also be provided as a separate body.
- 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 obtained by further laminating a reflective plate or a semi-transmissive reflective plate on a polarizing plate, an elliptical polarizing plate or a circular plate comprising a retardation plate further laminated by 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 or the like of a type that reflects incident light from the viewing side (display side).
- a liquid crystal display device or the like of a type that reflects 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-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 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 screen.
- the reflecting plate instead of the method of directly applying the reflecting plate to the transparent protective film of the polarizing plate, It can also be used as a reflection sheet in which a reflection layer is provided on an appropriate film according to a bright 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. 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.
- the retardation plate 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 are supported by the film. And so on.
- the thickness of the retardation plate is not particularly limited, but is generally about 20 to 150 / ⁇ ⁇ .
- polymer material examples include, for example, polyvinyl alcohol, polyvinyl butyral, polymethylbinole ether, polyhydroxy ethinoreal tallylate, hydroxy ethinore cellulose, hydroxypropyl cellulose, methenorescenellose, polycarbonate, polyarylate, Polysulfone, Polyethylene terephthalate, Polyethylene naphthalate, Polyetherolsulfone, Polyphenylene sulfide, Polyphenylene oxide, Polyallylsulfone, Polyamide, Polyimide, Polyolefin, Polychlorinated butyl, Cellulose polymer, Norbornene resin, or These binary and ternary copolymers, graft copolymers, blends and the like can be mentioned. 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, formed on a surface subjected to alignment treatment such as those obtained by rubbing the surface of a thin film such as polyimide or polybulualcohol formed on a glass plate, or those obtained by obliquely vapor deposition of acid cage. This is done by developing a liquid crystalline polymer solution and heat-treating it.
- 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, or for the purpose of compensation of vision, etc. 2 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 elliptically polarizing plate are different from the polarizing plate or the reflective polarizing plate.
- a phase difference plate is laminated 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.
- 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 enter and be in a predetermined polarization state. Transmitted light is obtained and light other than the predetermined polarization state is reflected without being transmitted.
- 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.
- 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.
- Examples of the brightness enhancement film include a dielectric multilayer thin film and a refractive index anisotropy. Supports the alignment film of cholesteric liquid crystal polymer and its alignment liquid crystal layer on a film substrate, such as a multilayer laminate of different thin film films, which shows the characteristic of transmitting linearly polarized light with a predetermined polarization axis and reflecting other light Appropriate ones such as those that reflect either left-handed or right-handed circularly polarized light and transmit other light can be used.
- the transmission light is directly incident on the polarizing plate with the polarization axis aligned, thereby suppressing absorption loss due to the polarizing 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 for light of wavelength 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 to form 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. in front 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.
- the method for forming the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include a method of applying a pressure-sensitive adhesive solution on the optical film and drying, a method of transferring with a release sheet provided with the pressure-sensitive adhesive layer, and the like.
- 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 can be employed.
- the thickness of the adhesive layer is not particularly limited, but is preferably about 10 to 40 / ⁇ ⁇ .
- the pressure-sensitive adhesive layer is formed after forming the anchor coat layer on the optical film.
- a solution of an anchor component such as a polyethyleneimine aqueous solution is applied and dried using a coating method such as a coating method, a dating method, or a spray method to form an anchor coat layer.
- the thickness of the anchor coat layer is preferably about 10 to 5000 nm, more preferably in the range of 50 to 500 nm.
- the anchor coat layer does not have a property as a barrier and does not show sufficient strength, and sufficient adhesion may not be obtained. On the other hand, if it is too thick, the optical characteristics may be deteriorated.
- the optical film can be subjected to an active layer treatment.
- Various methods can be used for the activation treatment, such as corona treatment, low-pressure UV treatment, and plasma treatment.
- an antistatic layer can be appropriately formed.
- 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 to improve the peelability of the adhesive layer! / OK!
- each layer such as the optical film and the pressure-sensitive adhesive layer of the pressure-sensitive adhesive optical film of the present invention includes, for example, a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, and a nickel complex salt compound.
- UV absorption of compounds, etc. It may be one that has UV absorption ability by a method such as a method of treating with an agent.
- the 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. That is, a liquid crystal display device is generally formed by appropriately assembling components such as a liquid crystal cell, an adhesive optical film, and an illumination system as necessary, and incorporating a drive circuit. Accordingly, there is no particular limitation except that the pressure-sensitive adhesive optical film according to the present invention is used.
- the liquid crystal cell an arbitrary type such as an arbitrary type such as a TN type, an STN type, or a ⁇ type can be used.
- An appropriate liquid crystal display device such as a liquid crystal display device in which an 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 used.
- the optical film according to the present invention can be installed on one side or both sides of the liquid crystal cell.
- optical films are provided on both sides, they may be the same or different.
- one layer or two layers of appropriate parts such as a diffusion plate, an antiglare layer, an antireflection film, a protective plate, a prism array, a lens array sheet, a light diffusion plate, and a backlight at appropriate positions. Can be placed more than layers.
- organic electroluminescence device organic EL display device
- 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 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 holes and electrons are injected into an organic light emitting layer by applying a voltage to a transparent electrode and a metal electrode, and energy generated by recombination of these holes and electrons.
- Lugi illuminates on the principle that the phosphor material excites the phosphor and emits light when the excited phosphor 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 10 nm. 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 a front surface side of an organic light emitting layer that emits light when voltage is applied and a metal electrode on a 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.
- This linearly polarized light is generally elliptically polarized by the phase difference plate, but it is circularly polarized when the phase difference plate is a 1Z4 wavelength plate and the angle between the polarization direction of the polarizing plate and the phase difference plate is ⁇ ⁇ 4. .
- This circularly polarized light is transmitted through the transparent substrate, the transparent electrode, and the organic thin film, reflected by the metal electrode, and re-transmitted.
- the light passes through the organic thin film, the transparent electrode, and the transparent substrate, and becomes linearly polarized light again on the retardation plate.
- 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 80 ⁇ m-thick polybulal alcohol film was stretched three times in a 0.3% strength iodine aqueous solution at 30 ° C. between rolls with different speed ratios. Next, the film was stretched to a total stretching ratio of 6 times in an aqueous solution containing 4% boric acid and 10% potassium iodide at 60 ° C. Next, it was washed by dipping in a 1.5% strength potassium iodide aqueous solution at 30 ° C. for 10 seconds and then dried at 50 ° C. for 4 minutes to obtain a polarizer. On one side of this polarizer, a saponified 80 ⁇ m thick triacetyl cellulose film was bonded with a polybulal alcohol adhesive.
- a 70-m-thick cyclic olefin-based resin film (manufactured by ZEON Corporation, trade name “Zeonor”) was bonded with a polybulur alcohol-based adhesive.
- the moisture permeability of the cyclic olefin-based resin film at 80 ° C and 90% RH was 127g / m 2 ⁇ 24h.
- a crosslinking agent mainly composed of a compound having an isocyanate group of 0.6 part (manufactured by Nippon Polyurethane Co., Ltd., product) Name “Coronate L”) and 0.075 parts of ⁇ -glycidoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “ ⁇ -403”) in this order as silane coupling agents.
- the adhesive solution was prepared by blending.
- the pressure-sensitive adhesive solution is uniformly coated on the surface of a separator made of a polyethylene terephthalate film surface-treated with a silicone release agent, using a fountain coater, and dried in an air circulation type thermostatic oven at 155 ° C for 3 minutes.
- An adhesive layer having a thickness of 25 m was formed on the separator surface.
- a separator having an adhesive layer formed thereon was transferred to one side of the polarizing plate (on the side of the cyclic olefin-based resin film) to produce an adhesive polarizing plate.
- Example 2 Comparative Examples 1-2
- Example 1 a pressure-sensitive adhesive solution was prepared in the same manner as in Example 1 except that the compounding amount of the crosslinking agent mainly composed of a compound having an isocyanate group was changed as shown in Table 1. It was. Further, an adhesive polarizing plate was produced in the same manner as in Example 1.
- Example 1 In Example 1, except that the amount of acrylic acid used was changed from 5 parts to 8 parts, an acrylic polymer solution with a solid content adjusted to 30% (soot was obtained) was obtained in the same manner as Example 1.
- Example 3 was the same as Example 3 except that the blending amounts of the crosslinking agent mainly composed of a compound having an isocyanate group and the peroxide-based crosslinking agent were changed as shown in Table 1. Then, an adhesive solution was prepared. Further, an adhesive polarizing plate was produced in the same manner as in Example 1. Further, an adhesive polarizing plate was produced in the same manner as in Example 1.
- a crosslinking agent containing 2.5 parts of a compound having an isocyanate group (manufactured by Nippon Polyurethane Co., Ltd., product) Name “Coronate L”) and 0.01 part of ⁇ -glycidoxyp-pyrutrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “ ⁇ -403”) as silane coupling agents in this order.
- the adhesive solution was prepared by blending. In the same manner as in Example 1, an adhesive polarizing plate was produced.
- Example 6 a pressure-sensitive adhesive solution was prepared in the same manner as in Example 6 except that the compounding amount of the crosslinking agent mainly composed of a compound having an isocyanate group was changed as shown in Table 1. It was. Further, an adhesive polarizing plate was produced in the same manner as in Example 1.
- the pressure-sensitive adhesive layer was cut into 300 mm ⁇ 240 mm (about 1.5 g) and folded to form a lump of pressure-sensitive adhesive layer as a sample. This sample was placed on the sample board after the weight of the aluminum foil was measured. The sample produced by this method was put into a heating oven and the moisture content was determined. The measurement conditions were a nitrogen cylinder flow rate of 300 mlZmin, a nitrogen flow rate in the equipment of 200 mlZmin, and a heating oven at 110 ° C. Measure to the point where the drift value is +0.1 ⁇ gZs, and measure the total moisture content. Equilibrium moisture content (%): (total moisture content Z adhesive layer weight) X 100, (Karl-Fischer moisture content meter).
- a sample obtained by cutting a 25 ⁇ m thick adhesive layer into a width of 10 mm ⁇ 3 Omm was used as a sample.
- the upper 10 mm ⁇ 10 mm of this sample was attached to a beta plate, autoclaved at 50 ° C. and 50 atm for 15 minutes, and then left at room temperature (23 ° C.) for 1 hour. Thereafter, a load of 500 g was applied to the sample (load of tensile shear stress in the drooping direction), and the amount of sample deviation ( ⁇ m ) after 1 hour was measured. [0117] ⁇ Foaming test>
- Adhesive optical film (15-inch sample) was attached to both sides of a non-alkali glass plate having a thickness of 0.07 mm so as to be in a cross-cor state. Subsequently, autoclaving was performed for 15 minutes at 50 ° C. and 5 atm to achieve complete adhesion. After the sample was treated at 80 ° C. for 500 hours, the foaming state was observed according to the following criteria. For the observation of foaming, the number of foams in four corner areas (50 mm x 50 mm) of a 15-inch sample was measured with a polarizing microscope.
- ⁇ The number of foams is less than 100.
- the number of foams is 100 or more.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Organic Chemistry (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Holo Graphy (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07745015A EP2037299B1 (en) | 2006-06-28 | 2007-06-11 | Adhesive optical film and image display device |
US12/304,817 US20090324944A1 (en) | 2006-06-28 | 2007-06-11 | Pressure-sensitive adhesive optical film and image display |
AT07745015T ATE551625T1 (de) | 2006-06-28 | 2007-06-11 | Klebender optischer film und bildanzeigeeinrichtung |
CN2007800245986A CN101479632B (zh) | 2006-06-28 | 2007-06-11 | 粘合型光学薄膜及图像显示装置 |
US14/542,246 US20150062705A1 (en) | 2006-06-28 | 2014-11-14 | Pressure-sensitive adhesive optical film and image display |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-178456 | 2006-06-28 | ||
JP2006178456 | 2006-06-28 | ||
JP2007151628A JP5010994B2 (ja) | 2006-06-28 | 2007-06-07 | 粘着型光学フィルムおよび画像表示装置 |
JP2007-151628 | 2007-06-07 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/304,817 A-371-Of-International US20090324944A1 (en) | 2006-06-28 | 2007-06-11 | Pressure-sensitive adhesive optical film and image display |
US14/542,246 Division US20150062705A1 (en) | 2006-06-28 | 2014-11-14 | Pressure-sensitive adhesive optical film and image display |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008001601A1 true WO2008001601A1 (fr) | 2008-01-03 |
Family
ID=38845369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/061725 WO2008001601A1 (fr) | 2006-06-28 | 2007-06-11 | Film optique adhésif et dispositif d'affichage d'image |
Country Status (8)
Country | Link |
---|---|
US (2) | US20090324944A1 (ja) |
EP (1) | EP2037299B1 (ja) |
JP (1) | JP5010994B2 (ja) |
KR (1) | KR100968392B1 (ja) |
CN (1) | CN101479632B (ja) |
AT (1) | ATE551625T1 (ja) |
TW (1) | TWI385422B (ja) |
WO (1) | WO2008001601A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120114937A1 (en) * | 2010-11-10 | 2012-05-10 | Nitto Denko Corporation | Insulating tape |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009237037A (ja) * | 2008-03-26 | 2009-10-15 | Sumitomo Chemical Co Ltd | 光学フィルム貼合ガラス基板 |
JP5518436B2 (ja) | 2009-11-09 | 2014-06-11 | 日東電工株式会社 | 光学用粘着シート |
JP5795472B2 (ja) * | 2009-11-30 | 2015-10-14 | リンテック株式会社 | 導電膜貼付用粘着剤及び導電膜貼付用粘着シート |
JP6114004B2 (ja) * | 2011-11-10 | 2017-04-12 | 日東電工株式会社 | 粘着剤組成物、及び粘着シート |
TWI548129B (zh) * | 2012-12-27 | 2016-09-01 | 住華科技股份有限公司 | 有機發光二極體裝置 |
JP6048297B2 (ja) * | 2013-04-24 | 2016-12-21 | 住友化学株式会社 | 光学積層体及びそれを用いた表示装置 |
JP6138002B2 (ja) | 2013-09-09 | 2017-05-31 | 日東電工株式会社 | 透明導電膜用粘着剤層付偏光フィルム、積層体、及び、画像表示装置 |
JP6585333B2 (ja) * | 2013-12-03 | 2019-10-02 | 日東電工株式会社 | 偏光フィルム、粘着剤層付偏光フィルムおよび画像表示装置 |
JP6178229B2 (ja) * | 2013-12-09 | 2017-08-09 | 日東電工株式会社 | 液晶パネル、及び画像表示装置 |
JP5871408B1 (ja) * | 2014-09-19 | 2016-03-01 | 日東電工株式会社 | 偏光板および光学積層体 |
JP6692599B2 (ja) * | 2014-09-19 | 2020-05-13 | 日東電工株式会社 | 粘着剤層付き偏光板 |
JP5871407B1 (ja) * | 2014-09-19 | 2016-03-01 | 日東電工株式会社 | 偏光板 |
JP6944759B2 (ja) * | 2015-10-13 | 2021-10-06 | 日東電工株式会社 | 粘着剤層付き偏光板 |
KR20180034188A (ko) * | 2016-09-27 | 2018-04-04 | 엘지엠엠에이 주식회사 | 광학필름 제조용 도프용액 및 이를 이용한 광학필름 |
JP6857477B2 (ja) * | 2016-09-30 | 2021-04-14 | 日東電工株式会社 | 有機el表示装置 |
CN111163938B (zh) | 2017-10-12 | 2022-09-09 | 艾利丹尼森公司 | 低放气清洁胶黏剂 |
JP7133354B2 (ja) * | 2018-05-17 | 2022-09-08 | 日東電工株式会社 | 映り込み防止層付偏光板 |
JP7365772B2 (ja) * | 2019-02-07 | 2023-10-20 | 日東電工株式会社 | 粘着シート、光学積層体、および画像表示装置 |
CN113490869B (zh) * | 2019-02-27 | 2023-11-07 | 住友化学株式会社 | 层叠体 |
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JPH0314882A (ja) | 1989-03-10 | 1991-01-23 | Mitsui Petrochem Ind Ltd | メッキ用組成物およびメッキ物 |
JPH03122137A (ja) | 1989-10-06 | 1991-05-24 | Japan Synthetic Rubber Co Ltd | 熱可塑性樹脂成形品 |
JPH09281336A (ja) | 1996-04-12 | 1997-10-31 | Nitto Denko Corp | 光学フィルム及び液晶表示装置 |
WO2001037007A1 (fr) | 1999-11-12 | 2001-05-25 | Kaneka Corporation | Film transparent |
JP2001343529A (ja) | 2000-03-30 | 2001-12-14 | Kanegafuchi Chem Ind Co Ltd | 偏光子保護フィルムおよびその製造方法 |
JP2001350018A (ja) * | 2000-06-05 | 2001-12-21 | Nitto Denko Corp | 光学補償フィルム、偏光板及びそれを用いた液晶表示装置 |
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JPH0996722A (ja) * | 1995-10-02 | 1997-04-08 | Fuji Photo Film Co Ltd | 偏光板保護膜 |
TWI300856B (ja) * | 1999-10-21 | 2008-09-11 | Konica Minolta Opto Inc | |
JP4301544B2 (ja) * | 2003-01-07 | 2009-07-22 | 日東電工株式会社 | 画像表示装置の製造方法、画像表示装置および粘着型光学フィルム |
CN100383570C (zh) * | 2003-09-30 | 2008-04-23 | 日东电工株式会社 | 偏振片的制造方法、偏振片、光学薄膜以及图像显示装置 |
US7749348B2 (en) * | 2003-09-30 | 2010-07-06 | Nitto Denko Corporation | Method for manufacturing polarizing plate, polarizing plate, optical film and image viewing display |
TWI380900B (zh) * | 2004-09-17 | 2013-01-01 | Sumitomo Chemical Co | 光學疊層體 |
KR20070097518A (ko) * | 2005-01-17 | 2007-10-04 | 닛토덴코 가부시키가이샤 | 편광판, 그 제조 방법, 광학 필름 및 그것을 이용한 화상표시 장치 |
JP4807774B2 (ja) * | 2005-10-20 | 2011-11-02 | 日東電工株式会社 | 液晶パネルおよび液晶表示装置 |
WO2007145081A1 (ja) * | 2006-06-14 | 2007-12-21 | Nitto Denko Corporation | 偏光子保護フィルム、偏光板、および画像表示装置 |
-
2007
- 2007-06-07 JP JP2007151628A patent/JP5010994B2/ja active Active
- 2007-06-11 WO PCT/JP2007/061725 patent/WO2008001601A1/ja active Application Filing
- 2007-06-11 KR KR1020087026483A patent/KR100968392B1/ko active IP Right Grant
- 2007-06-11 EP EP07745015A patent/EP2037299B1/en not_active Not-in-force
- 2007-06-11 US US12/304,817 patent/US20090324944A1/en not_active Abandoned
- 2007-06-11 AT AT07745015T patent/ATE551625T1/de active
- 2007-06-11 CN CN2007800245986A patent/CN101479632B/zh active Active
- 2007-06-27 TW TW096123172A patent/TWI385422B/zh active
-
2014
- 2014-11-14 US US14/542,246 patent/US20150062705A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0314882A (ja) | 1989-03-10 | 1991-01-23 | Mitsui Petrochem Ind Ltd | メッキ用組成物およびメッキ物 |
JPH03122137A (ja) | 1989-10-06 | 1991-05-24 | Japan Synthetic Rubber Co Ltd | 熱可塑性樹脂成形品 |
JPH09281336A (ja) | 1996-04-12 | 1997-10-31 | Nitto Denko Corp | 光学フィルム及び液晶表示装置 |
WO2001037007A1 (fr) | 1999-11-12 | 2001-05-25 | Kaneka Corporation | Film transparent |
JP2001343529A (ja) | 2000-03-30 | 2001-12-14 | Kanegafuchi Chem Ind Co Ltd | 偏光子保護フィルムおよびその製造方法 |
JP2001350018A (ja) * | 2000-06-05 | 2001-12-21 | Nitto Denko Corp | 光学補償フィルム、偏光板及びそれを用いた液晶表示装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120114937A1 (en) * | 2010-11-10 | 2012-05-10 | Nitto Denko Corporation | Insulating tape |
Also Published As
Publication number | Publication date |
---|---|
EP2037299A1 (en) | 2009-03-18 |
EP2037299A4 (en) | 2010-11-24 |
KR100968392B1 (ko) | 2010-07-07 |
US20090324944A1 (en) | 2009-12-31 |
JP5010994B2 (ja) | 2012-08-29 |
EP2037299B1 (en) | 2012-03-28 |
ATE551625T1 (de) | 2012-04-15 |
TWI385422B (zh) | 2013-02-11 |
KR20090006133A (ko) | 2009-01-14 |
CN101479632B (zh) | 2012-05-23 |
US20150062705A1 (en) | 2015-03-05 |
CN101479632A (zh) | 2009-07-08 |
JP2008033274A (ja) | 2008-02-14 |
TW200817734A (en) | 2008-04-16 |
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