CN103562760A - Composite polarizing plate and liquid crystal display device - Google Patents
Composite polarizing plate and liquid crystal display device Download PDFInfo
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- CN103562760A CN103562760A CN201280025724.0A CN201280025724A CN103562760A CN 103562760 A CN103562760 A CN 103562760A CN 201280025724 A CN201280025724 A CN 201280025724A CN 103562760 A CN103562760 A CN 103562760A
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- pressure
- sensitive adhesive
- adhesive layer
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- 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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- 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
- 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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- 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
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Surface Treatment Of Optical Elements (AREA)
- Adhesive Tapes (AREA)
Abstract
This composite polarizing plate has, laminated in this order, a first pressure-sensitive adhesive layer, polarizing plate, second pressure-sensitive adhesive layer, and transparent plastic substrate. The polarizing plate has a polarizing film and transparent protective film that is in contact with the second pressure-sensitive adhesive layer. The storage elastic modulus at 80 DEG C for the first pressure-sensitive adhesive layer is 10 - 100 KPa. The storage elastic modulus at 80 DEG C for the second pressure sensitive adhesive layer is 0.1 - 60 KPa. An anti-static layer is preferably laminated on the surface of the transparent plastic substrate on the opposite side from the second pressure-sensitive adhesive layer.
Description
Technical field
The present invention relates to composite polarizing plate and used its liquid crystal indicator.
Background technology
As with the slim composite polarizing plate that turns to object, proposed the first pressure-sensitive adhesive layer, polarizer (polarizing coating), the second pressure-sensitive adhesive layer and transparent plastic base to stack gradually the composite polarizing plate forming.This composite polarizing plate is directly stacked across the second pressure-sensitive adhesive layer by polarizer and transparent plastic base plate holder, as the second pressure-sensitive adhesive layer, adopted the pressure-sensitive adhesive layer (JP2010-39458-A) that demonstrates the storage modulus of 0.15～1MPa in the temperature range of 23～80 ℃.
In general, polarizing coating easily shrinks under high temperature, high humidity, in described composite polarizing plate, by the second pressure-sensitive adhesive layer as bonding polarizer and transparent plastic base, adopt the pressure-sensitive adhesive layer that storage modulus is high, even if also can realize the inhibition of the contraction of polarizing coating and transparent plastic base under high temperature, high humidity.But; in the situation that polarizing coating is stacked with transparent protective film, composite polarizing plate that this transparent protective film is engaged across pressure-sensitive adhesive layer with transparent plastic base plate holder; if use the pressure-sensitive adhesive layer that foregoing storage modulus is high, can produce that transparent plastic base also can be followed the contraction of the polarizing coating producing under high temperature, high humidity and the problem of shrinking.
In the liquid crystal panel with a pair of glass substrate clamping by liquid crystal cells, owing to utilizing its orientation of electric field controls that liquid crystal cells is applied, therefore in general to glass substrate, give electrostatic-proof function, yet recently, require giving electrostatic-proof function with the composite polarizing plate side of liquid crystal panel laminating.Here, in the situation that giving electrostatic-proof function to composite polarizing plate, for example can adopt following formation,, on described transparent plastic base, antistatic backing is set, utilize the paste of electric conductivity or conductive strips to be connected this antistatic backing and the circuit substrate of liquid crystal panel, yet in the foregoing composite polarizing plate shrinking, have the conductive paste or the cut situation of conductive strips that connect antistatic backing and circuit substrate under high temperature, high humidity.
In addition, in the glass substrate that forms liquid crystal panel, also require slimming.Here, the in the situation that of foregoing composite polarizing plate, folder across the first pressure-sensitive adhesive layer and with glass substrate laminating, yet when composite polarizing plate under high temperature, high humidity shrinks, with regard to likely by slimming glass substrate in produce warpage.
Summary of the invention
So, the object of the invention is to, provide at high temperature, under high humidity, suppressed the composite polarizing plate shrinking, following composite polarizing plate is particularly provided, , on transparent plastic base, antistatic backing is set, in the situation that same antistatic backing folder is connected with the circuit substrate of liquid crystal panel across conductive paste or conductive strips, even at high temperature, under high humidity, conductive paste or conductive strips can not be cut off yet, in addition, following composite polarizing plate is also provided, , in the situation that with slimming glass substrate laminating, even at high temperature, under high humidity, also can suppress the warpage of glass substrate.
The present invention has following formation.
[1], it is that the first pressure-sensitive adhesive layer, polaroid, the second pressure-sensitive adhesive layer, transparent plastic base are stacked gradually to the composite polarizing plate forming,
The transparent protective film that described polaroid has polarizing coating, contacts with the second pressure-sensitive adhesive layer,
The storage modulus of 80 ℃ of the first pressure-sensitive adhesive layer is 10～100KPa, and the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer is 0.1～60KPa.
[2] according to composite polarizing plate preceding paragraph [1] Suo Shu, wherein, described polaroid has the transparent protective film contacting with the first pressure-sensitive adhesive layer.
[3] according to preceding paragraph [1] or [2] described composite polarizing plate, wherein, the tensile modulus of elasticity of transparent plastic base is 2000～4500MPa.
[4] according to the composite polarizing plate described in any one in preceding paragraph [1]～[3], wherein, the thickness of transparent plastic base is 10～100 μ m.
[5] according to the composite polarizing plate described in any one in preceding paragraph [1]～[4], wherein, on the face of a side contrary to the second pressure-sensitive adhesive layer of transparent plastic base, be laminated with antistatic backing.
[6], it possess the described composite polarizing plate of preceding paragraph [5], have circuit substrate liquid crystal panel, connect conductive paste or the conductive strips of the antistatic backing of described composite polarizing plate and the circuit substrate of described liquid crystal panel.
According to the present invention, can be provided in the composite polarizing plate that has suppressed contraction under high temperature, high humidity.Particularly, following composite polarizing plate can be provided,, on transparent plastic base, antistatic backing is set, in the situation that same antistatic backing folder is connected with the circuit substrate of liquid crystal panel across conductive paste or conductive strips, even conductive paste or conductive strips can not be cut off yet under high temperature, high humidity, in addition, following composite polarizing plate can also be provided,, in the situation that with slimming glass substrate laminating, even if also can suppress the warpage of glass substrate under high temperature, high humidity.
Accompanying drawing explanation
Fig. 1 means the diagrammatic cross-section of the example that the layer of composite polarizing plate of the present invention forms.
Fig. 2 means the diagrammatic cross-section of the example that the layer of composite polarizing plate of the present invention forms.
Fig. 3 means the diagrammatic cross-section of the example that the layer of composite polarizing plate of the present invention forms.
Fig. 4 means the diagrammatic cross-section of the example that the layer of composite polarizing plate of the present invention forms.
Fig. 5 means the diagrammatic cross-section of the example that the layer of composite polarizing plate of the present invention forms.
Embodiment
The example that the layer of composite polarizing plate of the present invention is formed is schematically represented in Fig. 1～Fig. 5.As shown in Figure 1, composite polarizing plate 10 of the present invention is by the composite polarizing plate that the first pressure-sensitive adhesive layer 1, polarizing coating 3, transparent protective film 2a, the second pressure-sensitive adhesive layer 4, transparent plastic base 5 stack gradually, the second pressure-sensitive adhesive layer 4 contacts with transparent plastic base 5.In addition, also can between the first pressure-sensitive adhesive layer 1 and polarizing coating 3, possess transparent protective film 2b as shown in Figure 2, can also be as shown in Figure 3, transparent plastic base 5 with on the face contrary side of the second pressure-sensitive adhesive layer 4, stacked antistatic backing 6.In addition, also can be as shown in Figure 4, between the first pressure-sensitive adhesive layer 1 and polarizing coating 3; possesses polarizer 7 (doubling as transparent protective film); can also as shown in Figure 5, between the first pressure-sensitive adhesive layer 1 and polarizing coating 3, possess polarizer 7 and the 3rd pressure-sensitive adhesive layer 8.And, in a side contrary with polarizing coating 3 of the first pressure-sensitive adhesive layer 1, the distance piece (not shown) of conventionally fitting before the member laminating with other, protection composite polarizing plate.
Below, in also with reference to accompanying drawing, each layer described.
< polaroid >
Polaroid of the present invention is one of member of formation of composite polarizing plate, has polarizing coating and is laminated in the transparent protective film of the second pressure-sensitive adhesive layer side.This polaroid can be both 2 layers of formation of polarizing coating 3/ transparent protective film 2a as shown in Figure 1, can as shown in Figure 2, be also 3 layers of formation of transparent protective film 2b/ polarizing coating 3/ transparent protective film 2a.From the viewpoint of versatility, consider, preferably the polaroid of described 3 layers of formation.
< polarizing coating >
Polarizing coating is to have the film that takes out the function of rectilinearly polarized light from the natural light of incident, the polarizing coating that for example can use in polyvinyl alcohol resin film the absorption to have dichromatism pigment and be orientated.The polyvinyl alcohol resin that forms polarizing coating can be by being that resin saponification obtains by polyvinyl acetate.As polyvinyl acetate, be resin, except the polyvinyl acetate of the homopolymer as vinyl acetate, can also exemplify vinyl acetate with can with other the multipolymer etc. of monomer of its copolymerization.As other the monomer with vinyl acetate copolymerization, such as enumerating unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, acrylic amide etc.The saponification degree of polyvinyl alcohol resin is generally 85～100 % by mole of left and right, is preferably more than 98 % by mole.Also can be by the further modification of this polyvinyl alcohol resin, such as the polyvinyl formal that also can use with aldehydes modification, polyvinyl acetal etc.In addition, the degree of polymerization of polyvinyl alcohol resin is generally 1000～10000 left and right, is preferably 1500～5000 left and right.
By this polyvinyl alcohol resin masking and the material reel film that is used as polarizing coating use.The method of polyvinyl alcohol resin masking is not particularly limited, can utilizes known method masking.The thickness of the reel film consisting of polyvinyl alcohol resin is not particularly limited, yet is for example 1～150 μ m left and right.If also consider the easness of stretching etc., more than its thickness is preferably 10 μ m.
Polarizing coating is to manufacture through following operation, that is, by the operation of this kind of polyvinyl alcohol resin film uniaxial tension, polyvinyl alcohol resin film is adsorbed with dichromatism pigment dyeing this dichromatism pigment operation, absorption is had to the operation that boric acid aqueous solution is processed for the polyvinyl alcohol resin film of dichromatism pigment and the operation of washing after the processing by boric acid aqueous solution at this.As dichromatism pigment, can use iodine, dichromatic organic dyestuff.
< transparent protective film >
Stacked transparent protective film at least one party's of polarizing coating face.Both are bonding by water solution system, organic solvent solution system, no-solvent type etc., suitable bonding agent.As transparent protective film, can use in the past as the known various resin moldings of the transparent protective film of polaroid.In general, be applicable to using resin molding, the particularly tri acetyl cellulose membrane of cellulose ethanoate system.In the situation that the stacked transparent protective film in the two sides of polarizing coating too, can use known transparent resin film.
The plastic base > that < is transparent
As transparent plastic base, only otherwise the infringement transparency is the various resin moldings that resin, tygon, polypropylene, polystyrene, Polyvinylchloride etc. form such as enumerating by cellulose esters such as the annular ethylene series resin such as the vibrin such as acrylic resin, polyethylene terephthalate, polycarbonate, norbornene resin, triacetyl celluloses.Wherein, from viewpoints such as hardness, the transparency, throughput rate, costs, consider, be applicable to using polyethylene terephthalate film, cellulose esters resin film.
Polyethylene terephthalate can utilize make terephthalic acid (TPA) and ethylene glycol (and use as required other dicarboxylic acid and/or other glycol) the so-called direct polymerization method of directly reacting, the dimethyl ester that makes terephthalic acid (TPA) and ethylene glycol (and as required use other the dimethyl ester of dicarboxylic acid and/or other glycol) carry out ester exchange reaction so-called ester exchange reaction method etc. arbitrarily autofrettage obtain.In addition, polyethylene terephthalate also can contain known adjuvant as required.As known adjuvant, such as enumerating lubricant, anti blocking agent, thermal stabilizer, antioxidant, antistatic agent, photostabilizer, resistance to impact modifying agent etc.But, because the transparent plastic base as being laminated on polaroid needs the transparency, therefore preferably the addition of adjuvant is restricted to Min..
By by described polyethylene terephthalate with membranaceous shaping, implement stretch processing, just can produce the polyethylene terephthalate film having stretched.Stretching can utilize the uniaxial tension that stretches along MD direction (flow direction) or TD direction (direction vertical with flow direction), along MD direction and TD direction both sides, stretch biaxial stretch-formed, along neither MD direction neither TD direction the oblique extension that stretches of direction etc. arbitrarily method carry out.By implementing this stretched operation, can obtain the polyethylene terephthalate film that physical strength is high.Wherein, for curved (bowing) phenomenon of the bow because of biaxial stretch-formed or oblique extension, making the axis of orientation of PET is the film of about 45 ° with respect to MD direction, due to by it is fitted with volume to volume technique and polaroid as transparent plastic base, can obtain following composite polarizing plate,, in the situation that know the picture recognize liquid crystal panel with polarized sunglasses, can eliminate the knowledge producing because of the polarization axle of polarized sunglasses and the polarization axle quadrature of polaroid and recognize bad, therefore preferred.
Biaxial stretch-formed in the situation that, such as enumerating, will without alignment films, at the temperature more than glass temperature, carry out longitudinal stretching (stretching along MD direction), the method for then carrying out cross directional stretch (stretching along TD direction) or the method simultaneously stretching in length and breadth etc. with laminar extrusion molding.
Cellulose esters resin film is by cellulosic partial esterification thing or film that completely carboxylate forms, such as enumerating the film consisting of cellulosic acetic acid esters, propionic ester, butyric ester, their mixed ester etc.More particularly, can enumerate tri acetyl cellulose membrane, diacetyl cellulose film, cellulose ethanoate propionic ester film, cellulose acetate butyrate film etc.As this kind of cellulose esters resin film, can use suitable commercially available product, such as Fujitac TD80 (Fujiphoto (strain) system), Fujitac TD80UF (Fujiphoto (strain) system), Fujitac T40UZ (Fujiphoto (strain) system), Fujitac TD80UZ (Fujiphoto (strain) system), KC8UX2M (Konica Minolta Opto (strain) system), KC8UY (Konica Minolta Opto (strain) system), KC4UY (Konica Minolta Opto (strain) system) etc.
In addition, in the present invention, as transparent plastic base, can use the dephased phase retardation film of tool.In this situation, preferably so that the slow axis of phase retardation film and the absorption axes of polarizing coating in the mode of the angle of intersection of about 45 °, configure.As phase retardation film, can enumerate by the polymeric membrane consisting of polyvinyl alcohol (PVA), polycarbonate, polyester, polyarylate, polyimide, polyolefin, cyclic polyolefin, polystyrene, polysulfones, polyethersulfone, Kynoar/polymethylmethacrylate, liquid crystal polyester, acetylcellulose, ethylene-acetidin copolymer saponification material, Polyvinylchloride etc. is stretched and embodies the anisotropic blooming of refractive index.In addition, also can embody the anisotropic film of refractive index, utilize the coating of inorganic layered compounds to embody the anisotropic film of refractive index to use as phase retardation film making it orientation after coating fluid crystallinity compound on the base material by the dephased optical isotropy of tool not.In the situation that phase retardation film is used as transparent plastic base, preferably with respect to incident light wavelength, demonstrate the phase differential of 1/4 wavelength, in the face in this situation, phase difference value is generally 90～200 μ m left and right, is preferably 120～160 μ m.1/4 wavelength plate has the function that the rectilinearly polarized light penetrating is become to elliptically polarized light or circularly polarized light from polarizing coating.If used the polaroid of phase retardation film to be disposed at the front face side of liquid crystal cells the plastic base as transparent, in the situation that know the picture recognize liquid crystal panel with polarized sunglasses, can eliminate the knowledge producing because of the polarization axle of polarized sunglasses and the polarization axle quadrature of polaroid and recognize bad.Here, so-called polarized sunglasses, is the glasses that packed polaroid into, only makes for example, to see through along the rectilinearly polarized light of a direction (horizontal or longitudinal) vibration.
From the viewpoint to the contraction high temperature resistance, high humidity of polaroid, consider, the tensile modulus of elasticity of transparent plastic base is preferably in the scope in 2000～4500MPa.
The thickness of transparent plastic base can suitably be selected according to used material, yet is preferably 10～100 μ m, more preferably 20～60 μ m, more preferably 25～40 μ m.
< pressure-sensitive adhesive layer >
In composite polarizing plate 10 of the present invention, possess the first pressure-sensitive adhesive layer 1, the second pressure-sensitive adhesive layer 4 (Fig. 1～Fig. 4), can, between the first pressure-sensitive adhesive layer 1 and polarizing coating 3, possess polarizer 7 and the 3rd pressure-sensitive adhesive layer 8 in addition.
The first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer are respectively so long as have the layer of given storage modulus described later, in order to form these pressure-sensitive adhesive layers, such as using, using the pressure adhesive of the resins such as acrylic acid series, rubber series, urethane system, ester system, silicone-based, polyvingl ether system as principal ingredient.In the middle of them, be more suitably to using the pressure adhesive of the excellent acrylic resin such as the transparency, weatherability, thermotolerance as base polymer.Especially, preferably choice for use keep appropriate wellability or cohesiveness, with the cementability of transparent protective film or polarizing coating also excellent, under the condition of heating or humidification, can not produce the material that floats or the problem of peeling off such as peel off.In addition, can be also the pressure adhesive that is known as energy ray-curable, thermohardening type etc.In addition, the bonding agent for forming the 3rd pressure-sensitive adhesive layer, also can be used and described identical bonding agent.
Acrylic resin used in the formation of pressure-sensitive adhesive layer is not particularly limited, yet be for example applicable to using (methyl) acrylic ester base polymer of (methyl) butyl acrylate, (methyl) ethyl acrylate, (methyl) Isooctyl acrylate monomer, (methyl) 2-EHA and so on or having used the copolymerization of these (methyl) acrylate of more than two kinds, is base polymer.Copolymerization polar monomer on these base polymers in addition.As polar monomer, for example can enumerate (methyl) acrylic acid, (methyl) acrylic acid 2-hydroxypropyl acrylate, (methyl) hydroxy-ethyl acrylate, (methyl) acrylamide, N, the monomer with carboxyl, hydroxyl, amide group, amino, epoxy radicals etc. of N-dimethyl aminoethyl (methyl) acrylate, (methyl) glycidyl acrylate and so on.
These acrylic resins can be used as pressure adhesive and use separately, yet are as a rule combined with crosslinking chemical.As crosslinking chemical, can exemplify belong to divalent or polyvalent metal ion and and carboxyl between form carboxylic metallic salt crosslinking chemical, belong to polyamino compound and and carboxyl between form amido link crosslinking chemical, belong to polyepoxides or polyvalent alcohol and and carboxyl between form ester bond crosslinking chemical, belong to polyisocyanate compounds and and carboxyl between form crosslinking chemical of amido link etc.Wherein, polyisocyanate compounds is used as organic system crosslinking chemical and uses widely.
So-called energy ray-curable pressure adhesive, refer to following pressure adhesive,, there is the irradiation of the ultraviolet ray of being subject to or electron beam homenergic ray and curing character, and have at energy-ray pre-irradiation and have cohesive and closely sealed by adherend with film etc., the irradiation that can utilize energy-ray is solidified and is adjusted the character of closing force.As energy ray-curable pressure adhesive, particularly preferably use ultraviolet hardening pressure adhesive.Energy ray-curable pressure adhesive is generally usingd acrylic resin as above and energy-ray polymerizable compound and is formed as principal ingredient.Conventionally be also combined with crosslinking chemical, in addition, sometimes also coordinate as required Photoepolymerizationinitiater initiater or photosensitizer etc.
In the adhesive composition using in order to form pressure-sensitive adhesive layer, except above-mentioned base polymer and crosslinking chemical, as required, in order to adjust bounding force, cohesiveness, viscosity, elastic modulus, glass temperature of pressure adhesive etc., such as the suitable adjuvant such as resene, tackifying resin, antioxidant, dyestuff, pigment, defoamer, mordant, Photoepolymerizationinitiater initiater that also can be used as natural goods or complex.In addition, also can contain particulate and form the pressure-sensitive adhesive layer that demonstrates light scattering.
Pressure-sensitive adhesive layer can form by following method: each composition as above is dissolved or dispersed in the organic solvents such as toluene, ethyl acetate, form the solid component concentration of 10～40 % by weight left and right, the adhesive composition of gained is coated on base material, makes it dry and remove organic solvent.In the situation that belonging to energy ray-curable pressure adhesive, can be by the irradiation ultraviolet radiation of filming of formation like this, electron beam homenergic ray, and make required solidfied material.
As the method that forms pressure-sensitive adhesive layer, can adopt known method in the past, for example can enumerate (1) to polarizing coating, transparent protective film by the described adhesive composition of coating on surface of adherence, dry, irradiation energy ray and make it curing method as required; (2) from the duplexer that forms in advance pressure-sensitive adhesive layer on the surface of distance piece to polarizing coating, transparent protective film by the method for surface of adherence transfer printing pressure-sensitive adhesive layer etc.In addition, from improving the described viewpoint by the adaptation of surface of adherence and pressure-sensitive adhesive layer, consider, preferably to described, by surface of adherence, implemented corona treatment.And, in the situation that utilize the method for described (1) to form pressure-sensitive adhesive layer, in order to protect this layer distance piece of also can fitting in advance.
The thickness of pressure-sensitive adhesive layer is generally 1～40 μ m left and right, yet in order not damage the ground such as processability, permanance, realizes the slimming of composite polarizing plate, is preferably 3～25 μ m.In addition, as the thickness of the second pressure-sensitive adhesive layer, 5～15 μ m more preferably.
In pressure-sensitive adhesive layer, as required, also can, containing being useful on the particulate that demonstrates light scattering, can also coordinate the filling agent being formed by glass fibre or beaded glass, resin bead, metal powder or other inorganic powders etc.; Pigment or colorant, antioxidant, ultraviolet light absorber etc.In ultraviolet light absorber, there are salicylate based compound or benzophenone based compound, benzotriazole based compound, cyanoacrylate based compound, nickel complex based compound etc.
< the first pressure-sensitive adhesive layer >
The storage modulus of 80 ℃ of the first pressure-sensitive adhesive layer is 10～100KPa.By making the first pressure-sensitive adhesive layer there is described given storage modulus, for example in the situation that by composite polarizing plate of the present invention folder across the first pressure-sensitive adhesive layer be fitted in slimming glass substrate on, even if also can suppress the warpage of glass substrate under high temperature, high humidity.In addition, from suppressing the viewpoint of the warpage of this glass substrate, consider, the storage modulus of 80 ℃ of the first pressure-sensitive adhesive layer is preferably 10～60KPa, more preferably 20～50KPa.
< the second pressure-sensitive adhesive layer >
The storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer is 0.1～60KPa.By making the second pressure-sensitive adhesive layer there is described given storage modulus, for composite polarizing plate of the present invention, even under high temperature, high humidity, also can suppress well the contraction of polaroid and transparent plastic base.Particularly, in the situation that antistatic backing is set on transparent plastic base, this antistatic backing folder is connected with the circuit substrate of liquid crystal panel across conductive paste or conductive strips, even also can prevent the cut-out of conductive paste or conductive strips under high temperature, high humidity.In addition, the viewpoint consideration of shrinking from described inhibition, the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer is preferably 0.1～40KPa, more preferably 0.1～30KPa.
For the second pressure-sensitive adhesive layer being controlled for described given storage modulus, as the bonding agent that forms the second pressure-sensitive adhesive layer, preferably contain the bonding agent of acrylic resin described later (1), acrylic resin (2), silicone oligomer (3) and crosslinking chemical (4).
< acrylic resin (1) >
Acrylic resin (1): contain and come from the Component units (a) of monomer (A) and come from the Component units (b) of monomer (B) and the acrylic resin that weight-average molecular weight is 1000000～2000000
Monomer (A): (methyl) acrylate shown in formula (A)
In formula (A), R
1represent hydrogen atom or methyl, R
2the alkyl or the aralkyl that represent carbon number 1～14.R
2hydrogen atom also can be replaced by the alkoxy of carbon number 1～10.
Monomer (B): the monomer shown in following (B-1) and/or following (B-2)
(B-1): the monomer that contains at least 1 carboxyl and 1 olefinic double bond
(B-2): contain at least 1 polar functional group being selected from hydroxyl, amide group, amino, epoxy radicals, oxetanyl, aldehyde radical and isocyanate group and the monomer of olefinic double bond
< acrylic resin (2) >
Acrylic resin (2): contain the acrylic resin that Component units (a) and Component units (b) and weight-average molecular weight are 50000～500000
< silicone oligomer >
Silicone oligomer (3): contain 2～100 oligomer that come from the Component units (s) of the compound shown in following formula (S).(wherein,, in silicone oligomer (3), also can not contain different Component units of more than two kinds (s).)
In formula (S), R
3, R
4represent alkyl or phenyl, X and Y represent hydrogen atom, can substituted alkyl, can substituted phenyl, can substituted alkoxy, can substituted phenoxy group, can substituted aralkyl, can substituted aralkyl oxy, vinyl, vinyl oxygen base, 1,2-epoxy radicals cyclohexyl, 1,2-epoxy radicals cyclohexyl oxygen base, styryl, styryl oxygen base, methacryloxy, amino, urea groups, sulfydryl or isocyanate group.
From suppressing the viewpoint of the contraction of the composite polarizing plate high temperature, high humidity, consider, the creep compliance that utilizes the given test method determination of recording in embodiment described later of the second pressure-sensitive adhesive layer is the scope in 200～600 μ m, the more preferably scope in 300～400 μ m preferably.
< the 3rd pressure-sensitive adhesive layer >
In the situation that possessing polarizer between the first pressure-sensitive adhesive layer and polarizing coating, can polarizing coating and phase differential plate holder is bonding across the 3rd pressure-sensitive adhesive layer.The 3rd pressure-sensitive adhesive layer preferably demonstrates the storage modulus of 0.15～1MPa in the temperature range of 23～80 ℃.In order to obtain this kind of storage modulus, for example, to coordinating the oligomer of acrylic acid urethane ester system in described adhesive composition, be effective way.More preferably after coordinating this kind of acrylic acid urethane ester to be oligomer, irradiation energy ray and make it curing.
< polarizer >
Composite polarizing plate of the present invention can as shown in Figures 4 and 5, between the first pressure adhesive 1 and polarizing coating 3, also possess polarizer 7 except transparent protective film 2b.Like this, just can form the composite polarizing plate of the viewing angle compensation function of giving liquid crystal cells, or form the composite polarizing plate of Elliptical circle or circularly polarized light pattern.This polarizer for example can obtain by stretching thermoplastic resin film.The kind that forms the thermoplastic resin of polarizer is not particularly limited, and except above-mentioned cellulose ethanoate is resin, can also enumerates and take annular ethylene series resin that polycarbonate, norbornene resin be typical example etc.
In addition, also can be used as polarizer and use optical compensation films.Optical compensation films is for compensating the film of optical phase difference when polaroid is equipped on to liquid crystal display, the optical compensation films that embodies the phase differential of thickness direction, the optical compensation films etc. of coating layer that formed liquid crystal compounds such as enumerating the coating layer that forms inorganic layered compounds.In the commercially available optical compensation films of coating layer that has formed liquid crystal compounds, there are " Wide View " (sometimes also showing as " WV Film ") that Fujiphoto (strain) sells, " NH Film " that the JX day ore deposit day stone energy (strain) is sold, " NV Film " etc.
The absorption axes angulation of the slow axis of polarizer or optical compensation films and polarizing coating is not particularly limited, can be according to suitably settings such as the specifications of applied liquid crystal cells.In the situation that laminating polarizer or optical compensation films and make the composite polarizing plate with viewing angle compensation function, with merely the polaroid situation stacked with polarizer compared, the generation of (look pulls out け) that can more effectively suppress to fade, therefore preferably.
< antistatic backing >
As shown in Figure 3, can be at a contrary side transparent plastic base 5 and faces the second pressure-sensitive adhesive layer 4 contacts, stacked antistatic backing 6.Antistatic backing 6 can form by the following method: by contain antistatic agent, fluorine system or the levelling agent of silicone-based and the transparent resin of solvent seasoning type resin that become transparent after resin solidification in known ultraviolet curing resin, be coated on transparent plastic base 5, utilize ultraviolet ray that described transparent resin is solidified to form.In general in order to obtain the function as antistatic backing, sheet resistance value is preferably 10
14below Ω/, more preferably 10
12below Ω/.
In the antistatic agent that becomes transparent after resin solidification, have organic system antistatic agent and inorganic be antistatic agent.In organic system antistatic agent, such as can enumerate quaternary ammonium salt, pyridiniujm, there are the various cationic antistatic agents of the primary～cationic bases such as tertiary amino; The negative ion with anionic property bases such as sulphonate-base, sulfuric ester alkali, phosphate alkali, phosphonic acids alkali is antistatic agent; The both sexes antistatic agents such as amino acid system, amidosulphuric acid ester system; The various surfactant type antistatic agents such as antistatic agent of the nonionics such as amino alcohol system, glycerine system, polyglycol system; And the polymer electrolyte antistatic agent that antistatic agent macromolecule as above has been quantized etc., in addition, also can use and there is tertiary amino or quaternary ammonium salt base, the monomer that can utilize ionizing radiation polymerization or oligomer, N for example, N-dialkyl aminoalkyl (methyl) acrylate monomer, their the polymerism antistatic agents such as quaternary ammonium compound.
Inorganic be in antistatic agent, can use ATO, SnO
2, ITO etc. particulate, particularly in filming after resin solidification, demonstrate the transparency, preferably particle diameter is made as below visible light wavelength, below 700nm.Inorganic is that the addition of antistatic agent is preferably 10～80 % by weight with respect to resin.By coating on transparent plastic base, by organic system antistatic agent or the inorganic of particle diameter that have below visible wavelength, be the material obtaining during antistatic agent is scattered in transparent resin, just can obtain transparent and there is the transparent plastic base of anti-static ability.
In the coating process of the coating that contains antistatic agent, such as using the known methods such as rolling method, intaglio plate rubbing method, silk screen rubbing method, jetting type rubbing method.
< other layer >
In addition, also can, by be configured to the mode also with surface-treated layers such as hard conating, anti-glare layer, anti-reflection layers when the surface of transparent plastic base has antistatic backing, improve visuality or improve hardness, mar resistance.But in order to maintain the function of antistatic backing, in the situation that having surface-treated layer, sheet resistance value is also preferably 10
14below Ω/, more preferably 10
12below Ω/.
Hard conating can be the layer of surface smoothing or at the irregular layer of surperficial tool, such as the layer that can exemplify the independent coating such as the resin material that utilizes silicone-based, acrylic acid series, acrylic acid urethane ester system and form; Or the layer that the coating that has mixed the material of filling agent in this resin forms.Hard conating can be by utilizing the known methods such as spin-coating method, miniature intaglio plate rubbing method be coated with above-mentioned hard conating resin and make it to solidify to arrange.The thickness of hard conating is 1～30 μ m left and right, more than being preferably 3 μ m, is preferably in addition below 20 μ m.Its refractive index is generally below 1.65, is preferably 1.45～1.65 scope.
Anti-glare layer is the layer that visual obstruction is formed producing in order to prevent ambient light from mirroring the surface of polaroid, general way is, such as to make it curing mode etc. by roughened modes such as sandblast mode or embossing processing modes, after being coated with the coating fluid that is mixed with transparent particulate in ultraviolet curing resin, on the surface of transparent plastic base, form concavo-convex formation and form.If form above-mentioned hard conating to be provided with the state of concave-convex surface, it also can become anti-glare layer.
Anti-reflection layer is to prevent surperficial being reflected into object of ambient light of polaroid and the layer that forms, can utilize known method setting.For example, can pass through to use the rubbing methods such as miniature intaglio plate rubbing method, or use the vapor growth method of the physics such as evaporation or sputter, the layer that organism, metal, metallic compound etc. are set forms.
As the organism that is used to form anti-reflection layer, can enumerate polymkeric substance having imported fluorine atom etc.As suitable metal, can use aluminium, silver etc.In general metallic compound is inorganic compound, can use inorganic oxide, inorganic sulphide, inorganic fluoride etc.As the example of inorganic oxide, can enumerate monox, zinc paste, titanium dioxide, niobium oxide, cerium oxide, indium oxide-Xi, tungsten oxide, molybdena, antimony oxide, aluminium oxide, zirconia etc.As the example of inorganic sulphide, can enumerate zinc sulphide, antimony trisulfide etc.As the example of inorganic fluoride, can enumerate aluminum fluoride, lithium fluoride, sodium fluoride, magnesium fluoride, calcium fluoride, strontium fluoride, barium fluoride, yttrium fluoride, lanthanum fluoride, cerium fluoride, samaric fluoride, fluoridize niobium, lead fluoride etc.In the situation that anti-reflection layer is set, as long as the layer consisting of these organism, metal, metallic compound etc. has at least 1 layer, yet also can be made as required multilayer.
The manufacture method > of < composite polarizing plate
To manufacturing an example of the method for composite polarizing plate of the present invention, be described as follows.One or both sides at polarizing coating utilize the bonding transparent protective film of known bonding agent and obtain polaroid.Then, at stacked the first pressure-sensitive adhesive layer in the surface of polaroid.And, in the outside of the first pressure-sensitive adhesive layer, the distance piece of conventionally fitting.
On the other hand, on a side's of transparent plastic base face, stacked the second pressure-sensitive adhesive layer.Here, convention is that its surperficial distance piece of temporary protection is also set in the outside of the second pressure-sensitive adhesive layer.In the situation that antistatic backing or other layer (hard conating, antiglare layer, anti-reflection layer etc.) are set on the opposing party's of transparent plastic base face, both can be provided with in advance these layer transparent plastic base on stacked the second pressure-sensitive adhesive layer, also can, after being made as three layers of formation of transparent plastic base/the second pressure-sensitive adhesive layer/distance piece, on transparent plastic base, antistatic backing etc. be set.
Then, by by the transparent protective film of the polaroid previously having obtained, fit with the second pressure-sensitive adhesive layer of having peeled off distance piece, just can obtain composite polarizing plate.
So long as adopt the layer of composite polarizing plate of the present invention to form, be not limited to described formation order, for example also can on the two sides of polaroid, form after first, second pressure-sensitive adhesive layer the transparent plastic base of fitting.
Applying method as polaroid and transparent plastic base, can adopt monolithic (Mei Leaf) applying method, the compound applying method of sheet material coiled material.In addition, can produce transparent plastic base to grow size, and in the situation that essential quantity is many, particularly useful by the applying method of volume to volume technique.
< liquid crystal indicator >
Composite polarizing plate of the present invention can be fitted in the first pressure-sensitive adhesive layer on the glass substrate of liquid crystal panel and make liquid crystal indicator.Here, with distance piece protection composite polarizing plate in the situation that, after being peeled off, fit on liquid crystal panel.In addition, from the viewpoint of static electricity resistance, consider, composite polarizing plate of the present invention is preferably in a contrary side transparent plastic base and face the second pressure-sensitive adhesive layer contact, be laminated with antistatic backing, in this case, composite polarizing plate of the present invention is preferably usingd antistatic backing as outside, is disposed at the visible side of liquid crystal indicator.
And composite polarizing plate of the present invention is such as being also fitted on the image-displaying members such as organic EL and make image display device.
< conductive paste or conductive strips >
As conductive paste or conductive strips, can suitably select following conductive paste or conductive strips: it is conductive paste or the conductive strips of generally selling and has enough electric conductivity on market, and good with the adaptation of circuit substrate of being located at antistatic backing on transparent plastic base, liquid crystal panel.As an example, conductive rubber member be can enumerate, on surface, be laminated with the rubber of metal forming, the plastic member of the metal forming of having reeled, the so-called brazing metal that contains simple substance at least arbitrarily in Au, Ag, Cu, Co, Ni, Sn, Pb or alloy, simple substance at least arbitrarily in Au, Ag, Cu, Co, Ni, Sn, Pb or resin, metal wiring or the metallic foil etc. of alloy contained.
Embodiment
Below, provide embodiment and the present invention is further described, yet the present invention is not limited to following example.
< storage modulus is measured >
By pressure adhesive, made 2, the spherical sample of 25 ± 1mg, these samples are one by one put between 3 plate jigs and prepared coupons.To coupons, use IT instrumentation to control the Measurement of Dynamic Viscoelasticity device of (strain) company system " DVA-200 ", utilize the off-resonance forced vibration method of frequency 10Hz, measure the storage modulus (G ') of 80 ℃.By measuring like this storage modulus (G ') of the pressure adhesive of 80 ℃, just can measure the storage modulus of the pressure-sensitive adhesive layer of 80 ℃ being formed by this pressure adhesive.
< creep compliance >
Pressure adhesive is fitted on the polaroid SRW062A of Sumitomo Chemical (strain) company system.Now under the condition of 280W, 10m/min, pressure-sensitive adhesive layer side and polaroid side are implemented to Corona discharge Treatment.Then, after size cutting with 25mm * 100mm, be fitted in alkali-free glass (Corning (strain) company system, Eagle-XG) upper, then, under 5MPa, 50 ℃, the condition of 20min, carry out autoclave processing, produce the test film of measuring creep compliance.The coupons of so making is placed 24 hours under 23 ℃ * 55% environment and after cultivating, apply abreast the load of 1kg with the long limit of test film.With laser displacement gauge (KEYENCE (strain) LK-G15 processed of company), measure from the displacement of the pressure-sensitive adhesive layer at initial stage to 3000 second, as creep compliance.
< corona discharge assembly >
In the present embodiment, used following corona discharge assembly.
Corona Surface Treatment flame STR-1764, high frequency electric source CT-0212, high-tension transformer CT-T02W (being all springtime motor (strain) system).
< is with the transparent plastic base > of antistatic backing
As the transparent plastic base with antistatic backing, used " the optics transparent protective film of letterpress (strain) company system: 40KSPLR ".The tensile modulus of elasticity of this substrate is 3431～4412MPa in MD direction, in TD direction, is 2941～3431MPa, and thickness is 45 μ m.In addition, the sheet resistance value of antistatic backing is 5 * 10
11Ω/.
< pressure-sensitive adhesive layer >
As the pressure adhesive that is used to form pressure-sensitive adhesive layer, used following pressure adhesive.
(1) pressure adhesive A
The storage modulus of 80 ℃ (G '): 34KPa
Creep compliance: 343 μ m
Thickness: 10 μ m
(2) pressure adhesive B (Sumitomo Chemical (strain) company system, optics pressure adhesive L2)
The storage modulus of 80 ℃ (G '): 227KPa
Creep compliance: 193 μ m
Thickness: 5 μ m
(3) pressure adhesive C
The storage modulus of 80 ℃ (G '): 36KPa
Creep compliance: 254 μ m
Thickness: 25 μ m
(4) pressure adhesive D
The storage modulus of 80 ℃ (G '): 53KPa
Creep compliance: 236 μ m
Thickness: 10 μ m
< embodiment 1>
(preparation of pressure adhesive C)
Take solid component content as benchmark, weight ratio polymerization by butyl acrylate (BA), methyl acrylate (MA), acrylic acid 2-phenoxy ethyl (PEA), acrylic acid 2-hydroxyl ethyl ester (HEA) and acrylic acid (AA) with 69:20:9:1:1, obtains weight-average molecular weight and is 1,500,000 acrylic resin.Then, these acrylic resin 100 weight portions are mixed with addition product (trade name: Coronate L, Japanese polyurethane industry (strain) system) 0.5 weight portion, antistatic agent 2 weight portions and silane compound (trade name: KBM-403, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 0.3 weight portion of toluene diisocyanate as crosslinking chemical.Then, so that the mode that concentration is 15% by this for potpourri MEK (MEK) dilution obtain adhesive composition (pressure adhesive C).
(preparation of pressure adhesive A)
" preparation of acrylic resin (1) "
Take solid component content as benchmark, and the weight ratio polymerization by butyl acrylate (BA) and acrylic acid (AA) with 99:1, obtains weight-average molecular weight and is 1,300,000 acrylic resin (1).
" preparation of acrylic resin (2) "
Take solid component content as benchmark, weight ratio polymerization by butyl acrylate (BA), butyl methacrylate (BMA), methyl acrylate (MA) and acrylic acid 2-hydroxyl ethyl ester (HEA) with 35:44:20:1, obtains weight-average molecular weight and is 100,000 acrylic resin (2).
" preparation of pressure adhesive A "
Described acrylic resin (1) and acrylic resin (2) 100 weight portions (weight ratio 70:30) are mixed with addition product (trade name: Coronate L, Japanese polyurethane industry (strain) system) 3 weight portions and silane compound (trade name: KBM-403, SHIN-ETSU HANTOTAI's chemical industry (strain) system) 0.3 weight portion of toluene diisocyanate as crosslinking chemical, so that the MEK for mode (MEK) that concentration is 15% dilutes, obtain adhesive composition (pressure adhesive A).
(making of the duplexer of transparent plastic base and the second pressure-sensitive adhesive layer)
In the described transparent plastic base with antistatic backing, on the face at not additional antistatic backing, the pressure-sensitive adhesive layer being formed by pressure adhesive A as the second pressure-sensitive adhesive layer laminating, and produce both stacked duplexers.And, when both are fitted, under the condition of 280W, 10m/min, each binding face is implemented to Corona discharge Treatment, improve the adaptation of pressure-sensitive adhesive layer and plastic base.
(making of polaroid)
By the polyvinyl alcohol film of the thick 75 μ m that formed by 99.9 % by mole of above polyvinyl alcohol (PVA) of average degree of polymerization approximately 2400, saponification degree with dry type mode uniaxial tension to approximately 5 times, again when keeping tension, in the pure water of 60 ℃, flood after 1 minute, in the aqueous solution that the weight ratio of iodine/potassium iodide/water is 0.05/5/100, at 28 ℃, flood 60 seconds.In aqueous solution that the weight ratio of potassium iodide/boric acid/water be 8.5/8.5/100 72 ℃ at flood 300 second thereafter.Next with the pure water of 26 ℃, clean after 20 seconds, dry at 65 ℃, obtain the polarizing coating that on polyvinyl alcohol (PVA) absorption has iodine and has been orientated.
On the two sides of this polarizing coating, as transparent protective film, laminating effects on surface has been implemented the tri acetyl cellulose membrane of the thick 40 μ m of saponification processing.In laminating, use water system bonding agent, by be dried 5 minutes at 80 ℃ after laminating, and transparent protective film and polarizing coating is bonding, produce by these three layers of polaroids forming of transparent protective film/polarizing coating/transparent protective film.
(formation of the first pressure-sensitive adhesive layer)
By the one side at described polaroid, the pressure-sensitive adhesive layer being formed by pressure adhesive C as the first pressure-sensitive adhesive layer laminating, and produce the duplexer of the first pressure-sensitive adhesive layer and polaroid.And, when both are fitted, under the condition of 280W, 10m/min, each binding face is implemented to Corona discharge Treatment, improve the adaptation of the first pressure-sensitive adhesive layer and polaroid.
(making of composite polarizing plate)
By be fitted with a side contrary to the first pressure-sensitive adhesive layer in the polaroid of the first pressure-sensitive adhesive layer, with the second pressure-sensitive adhesive layer laminating being formed with in the transparent plastic base of the second pressure-sensitive adhesive layer, produce composite polarizing plate.And, when both are fitted, with previously identical, each binding face is implemented to Corona discharge Treatment, improve both adaptations.
(heat-resistance test)
Described composite polarizing plate, so that the mode that polaroid absorption axes is 83 ° with respect to long limit is cut into the size of 92mm * 53mm, is made to sample for evaluation.Then, this sample for evaluation is fitted in to alkali-free glass (Corning (strain) company system, Eagle-XG) upper, then, under 5MPa, 50 ℃, the condition of 20min, carries out autoclave processing, make the adaptation of glass and assess sample abundant.
Then, by being fitted in sample for evaluation on glass, in high temperature groove (85 ℃), carry out after 100hr heat treated, the two-dimentional analyzer " NEXIV VMR-12072 " of use Nikon (strain) company system determines the change in size amount (amount of contraction) of transparent plastic base.Consequently, the change in size amount (amount of contraction) of long side is 131 μ m, and the change in size amount (amount of contraction) of short brink is 190 μ m.
< embodiment 2>
(preparation of pressure adhesive D)
Using addition product (trade name: Coronate L, Japanese polyurethane industry (strain) system) 3 weight portions of acrylic resin (1) 100 weight portion using in embodiment 1 and toluene diisocyanate as crosslinking chemical and silane compound (trade name: KBM-403, SHIN-ETSU HANTOTAI's chemical industry (strain) system), 0.3 weight portion mixes, so that the mode that concentration is 15% is diluted and obtained adhesive composition (pressure adhesive D) with MEK.
Except the pressure adhesive A that replaces using in embodiment 1, and used beyond pressure adhesive D, utilized the method identical with embodiment 1, produced composite polarizing plate.Then, to this composite polarizing plate, utilize the test method(s) identical with embodiment 1, determine the change in size amount (amount of contraction) of its transparent plastic base, consequently, the change in size amount (amount of contraction) of long side is 185 μ m, and the change in size amount (amount of contraction) of short brink is 227 μ m.
< comparative example 1>
Except the pressure adhesive A that replaces using in embodiment 1, and used beyond pressure adhesive B, utilized the method identical with embodiment 1, produced composite polarizing plate.Then, to this composite polarizing plate, utilize the test method(s) identical with embodiment 1, determine the change in size amount (amount of contraction) of its transparent plastic base, consequently, the change in size amount (amount of contraction) of long side is 289 μ m, and the change in size amount (amount of contraction) of short brink is 335 μ m.
When the result of comparing embodiment 1, embodiment 2 and comparative example 1, as shown in embodiment 1 and embodiment 2, in the situation that the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer (being formed by pressure adhesive A and D) (G ') be 34KPa and 53KPa, can suppress well the contraction of transparent plastic base, with respect to this, as shown in comparative example 1, (G ') is 227KPa in the situation that the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer (B forms by pressure adhesive), cannot suppress fully the contraction of transparent plastic base.In addition, when the result of comparing embodiment 1 and embodiment 2, can understand: for a side of the lower embodiment 1 (A forms by pressure adhesive) of the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer (G '), the amount of contraction of transparent plastic base is also lower.
Symbol description
1 first pressure-sensitive adhesive layer
2a, 2b transparent protective film
3 polarizing coatings
4 second pressure-sensitive adhesive layers
5 transparent plastic bases
6 antistatic backings
7 polarizers
8 the 3rd pressure-sensitive adhesive layers
10 composite polarizing plates
Claims (6)
1. a composite polarizing plate, it is that the first pressure-sensitive adhesive layer, polaroid, the second pressure-sensitive adhesive layer and transparent plastic base are stacked gradually to the composite polarizing plate forming,
Described polaroid has polarizing coating and the transparent protective film contacting with the second pressure-sensitive adhesive layer,
The storage modulus of 80 ℃ of the first pressure-sensitive adhesive layer is 10～100KPa, and the storage modulus of 80 ℃ of the second pressure-sensitive adhesive layer is 0.1～60KPa.
2. composite polarizing plate according to claim 1, wherein,
Described polaroid has the transparent protective film contacting with the first pressure-sensitive adhesive layer.
3. composite polarizing plate according to claim 1, wherein,
The tensile modulus of elasticity of transparent plastic base is 2000～4500MPa.
4. composite polarizing plate according to claim 1, wherein,
The thickness of transparent plastic base is 10～100 μ m.
5. according to the composite polarizing plate described in any one in claim 1～4, wherein,
On the face of a side contrary to the second pressure-sensitive adhesive layer of transparent plastic base, be laminated with antistatic backing.
6. a liquid crystal indicator, it possesses: composite polarizing plate claimed in claim 5, have the liquid crystal panel of circuit substrate and conductive paste or the conductive strips that the antistatic backing of described composite polarizing plate is connected with the circuit substrate of described liquid crystal panel.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-121556 | 2011-05-31 | ||
| JP2011121556 | 2011-05-31 | ||
| JP2012-066882 | 2012-03-23 | ||
| JP2012066882A JP6136093B2 (en) | 2011-05-31 | 2012-03-23 | Composite polarizing plate and liquid crystal display device |
| PCT/JP2012/062881 WO2012165184A1 (en) | 2011-05-31 | 2012-05-14 | Composite polarizing plate and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103562760A true CN103562760A (en) | 2014-02-05 |
| CN103562760B CN103562760B (en) | 2016-08-31 |
Family
ID=47259046
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280025724.0A Active CN103562760B (en) | 2011-05-31 | 2012-05-14 | Composite polarizing plate and liquid crystal indicator |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6136093B2 (en) |
| KR (1) | KR101819787B1 (en) |
| CN (1) | CN103562760B (en) |
| TW (1) | TWI569976B (en) |
| WO (1) | WO2012165184A1 (en) |
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| CN105467492B (en) * | 2014-09-29 | 2021-10-26 | 住友化学株式会社 | Polarizing plate |
| CN105739003A (en) * | 2014-12-26 | 2016-07-06 | 住友化学株式会社 | Polarizing plate |
| CN105866872A (en) * | 2015-02-11 | 2016-08-17 | 东友精细化工有限公司 | Highly durable polarizing plate and display device comprising the same |
| CN105572948A (en) * | 2016-03-23 | 2016-05-11 | 大连龙宁科技有限公司 | High-temperature high-humidity liquid crystal display device and manufacturing method thereof |
| CN105572948B (en) * | 2016-03-23 | 2022-03-25 | 大连龙宁科技有限公司 | High-temperature high-humidity liquid crystal display device and manufacturing method thereof |
| CN107436459A (en) * | 2016-05-26 | 2017-12-05 | 住友化学株式会社 | Polarization plates and liquid crystal display device |
| CN108333649A (en) * | 2017-01-20 | 2018-07-27 | 日东电工株式会社 | Polarization plates |
| CN110462497A (en) * | 2017-03-28 | 2019-11-15 | 日东电工株式会社 | Inline type liquid crystal display panel and liquid crystal display device |
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| CN113453891A (en) * | 2019-02-20 | 2021-09-28 | 住友化学株式会社 | Laminate, adhesive layer, and adhesive sheet |
| CN113574428A (en) * | 2019-03-18 | 2021-10-29 | 住友化学株式会社 | Laminate and display device comprising same |
| CN113614589A (en) * | 2019-03-18 | 2021-11-05 | 住友化学株式会社 | Method for producing coating film and display device comprising same |
| CN113614589B (en) * | 2019-03-18 | 2023-09-22 | 住友化学株式会社 | Method for producing coating film and display device comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6136093B2 (en) | 2017-05-31 |
| KR20140031924A (en) | 2014-03-13 |
| TWI569976B (en) | 2017-02-11 |
| WO2012165184A1 (en) | 2012-12-06 |
| TW201307087A (en) | 2013-02-16 |
| KR101819787B1 (en) | 2018-01-17 |
| JP2013011853A (en) | 2013-01-17 |
| CN103562760B (en) | 2016-08-31 |
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