CN100345041C - Mfg. method of optical stacker and LCD device - Google Patents
Mfg. method of optical stacker and LCD device Download PDFInfo
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- CN100345041C CN100345041C CNB2004100390757A CN200410039075A CN100345041C CN 100345041 C CN100345041 C CN 100345041C CN B2004100390757 A CNB2004100390757 A CN B2004100390757A CN 200410039075 A CN200410039075 A CN 200410039075A CN 100345041 C CN100345041 C CN 100345041C
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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
- G02B5/3041—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 comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—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 comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Liquid Crystal (AREA)
Abstract
Provided is a manufacturing method for layering an optical element comprising a liquid crystal substance layer having no supporting substrate film. The optical layered body is manufactured in the following processes. They are: a first process of adhering a liquid crystal substance layer having alignment of the liquid crystal fixed and being formed on an alignment substrate to a removable substrate via an adhesive layer 1, and then stripping the alignment substrate to transfer the liquid crystal substance layer onto the removable substrate to obtain a layered body (A) consisting of the removable substrate/adhesive layer 1/liquid crystal substance layer; a second process of laminating a polymer stretched film and the layered body (A) via a adhesive agent (adhesive) layer to obtain a layered body consisting of the removable substrate/adhesive layer 1/liquid crystal substance layer/adhesive agent (adhesive) layer/polymer stretched film; and a third process of stripping the removable substrate of the layered body and laminating a polarizing plate on the adhesive layer 1 or the polymer stretched film.
Description
Technical field
The present invention relates to be used for the manufacture method of the optical laminate of various optical elements.In addition, the invention still further relates to ellipsoidal polarizing plate or circular polarizing disk that optical laminate that described manufacture method obtains constitutes, also relate to the liquid crystal indicator that possesses this ellipsoidal polarizing plate or circular polarizing disk.
Background technology
The film (film) that the liquid-crystal compounds oriented layer constitutes, especially the film that is fixed as nematic structure, twisted nematic structure or constitutes to the liquid crystal material of row mixed structure, the element of using as the look or the viewing angle compensation of used for liquid crystal display element, during perhaps as optical activity optical element etc., have excellent performance, help various display element high performances and lighting.As the manufacture method of these films, proposed the layer that constitutes by liquid crystal material that forms on the orientation substrate, the method (for example the spy opens flat 4-57017 communique, the spy opens flat 4-177216 communique) of transcription to the light-transmitting substrate of double as support substrate.In addition, solution as the endurancing that stands the desired harshness of liquid crystal display cells, perhaps for further ultra-thinization, lighting, the manufacture method (for example, the spy opens flat 8-278491 communique) of the optical element that formed by the liquid crystal material that does not use the support substrate film has also been proposed.By described method, liquid crystal material layer with the orientation that forms on the orientation substrate, to the releasable substrate, peel off this releasable substrate by the cement transcription then, thereby can make the optical element that constitutes by the liquid crystal material layer that does not have the support substrate film.
On the other hand, in recent years, for employed optical thin film in the various display device headed by the liquid crystal indicator, require to have higher optical property, only use 1 layer of optical thin film can not meet the demands, thereby more be stacked use optical thin film.The broadband circular polarizing disk that the colorimetric compensation that for example can enumerate the stn liquid crystal display device obtains with 1/4 wave resistance plate in the circular polarizing disk and the folded broadband 1/4 wave resistance plate that obtains of 1/2 wave resistance flaggy or stacked cholesteric film with different choice wavelength coverage with stacked, the transflective liquid crystal display device that in the phase difference film with the polycarbonate is the macromolecule oriented film of representative etc.Herein, the folded broadband 1/4 wave resistance plate that obtains of 1/4 wave resistance plate and 1/2 wave resistance flaggy for example uses Jap.P. the 3236304th communique disclosed method stacked, is assembled into liquid crystal indicator and uses as circular polarizing disk.Such optical thin film layer poststack is except that obtaining high-performance, and mobile phones of popularizing in a large number or personal digital assistant device etc. are also very high to the requirement of ultra-thinization, lighting in recent years.The thing followed is for the optical thin film that uses in the display device also urgent its ultra-thinization of expectation, lighting.Therefore, carry out making the trial of thinner macromolecule oriented film etc., but because the restriction of optical characteristics or manufacturing process, can only the macromolecule oriented film have been made thinlyyer limitedly, during therefore stacked use, had the thicker problem of thickness.
Aspect addressing these problems, though think that using above-mentioned spy to open the optical element that the such liquid crystal material by there not being the support substrate film of flat 8-278491 communique forms is effectively,, the industrially preparing process of stacked this optical element is establishment as yet.
Summary of the invention
Only the objective of the invention is to realize simultaneously the optical characteristics high performance that is difficult to realize by the macromolecule oriented film and the significantly thinning of film.Promptly, be conceived to realize down the formed optical thin film of liquid crystal material of excellent optical property by thinner state, manufacture method to the stacked optical element that is made of the liquid crystal material layer that does not have the support substrate film has been carried out conscientious research, so that finished the present invention.
Promptly, the 1st aspect of the present invention relates to the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the releasable substrate by the cement layer, peel off orientation substrate then, with the transcription of liquid crystal material layer on the releasable substrate, obtain the 1st operation by the duplexer (A) that the releasable substrate/the cement layer/the liquid crystal material layer constitutes, (2) duplexer (A) and macromolecule oriented film are bonded together by bonding agent or cement, obtain the 2nd operation by releasable substrate/cement layer/liquid crystal material layer/adhesive phase or the duplexer that the cement layer/the macromolecule oriented film constitutes, and (3) peel off the releasable substrate of described duplexer, the 3rd operation of applying polaroid on cement layer or macromolecule oriented film.
The 2nd aspect of the present invention relates to the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is the liquid crystal material layer through the liquid crystal aligning that forms on the orientation substrate is fixed at least, engage with the macromolecule oriented film by the cement layer, peel off orientation substrate, with the transcription of liquid crystal material layer on the macromolecule oriented film, obtain the duplexer that macromolecule oriented film/cement layer/liquid crystal material layer constitutes, then by bonding agent or cement layer, in the operation of the macromolecule oriented film face or the liquid crystal material aspect applying polaroid of this duplexer.
The 3rd aspect of the present invention relates to the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the first releasable substrate by the first cement layer, peel off orientation substrate then, with the transcription of liquid crystal material layer on the first releasable substrate, then, by the second cement layer, engage the second releasable substrate and liquid crystal material layer, peel off the first releasable substrate, to the second releasable substrate transcription, obtain the 1st operation of the duplexer (B) of first cement layer/liquid crystal material layer/second cement layer/second releasable substrate formation; (2) duplexer (B) and macromolecule oriented film are bonded together by bonding agent or cement, obtain the 2nd operation of the duplexer of the second releasable substrate/second cement layer/liquid crystal material layer/first cement layer/adhesive phase or cement layer/macromolecule oriented film formation, and (3) peel off the second releasable substrate of described duplexer, the 3rd operation of applying polaroid on the second cement layer and macromolecule oriented film.
The 4th aspect of the present invention relates to the manufacture method of aforesaid optical laminate, and wherein said liquid crystal material layer is formed by the liquid crystal material layer that is fixed to the row orientation that the liquid crystal material that shows as positive single shaft tropism on the optics forms under mesomorphic state.
The 5th aspect of the present invention relates to the ellipsoidal polarizing plate that is formed by the optical laminate that utilizes aforesaid manufacture method to obtain.
The present invention the 6th aspect relates to the circular polarizing disk that is formed by the optical laminate that utilizes aforesaid manufacture method to obtain.
The present invention the 7th aspect relates to the liquid crystal indicator that possesses aforesaid ellipsoidal polarizing plate or circular polarizing disk at least.
In addition, above-mentioned "/" represents the interface of each layer, below equally the expression.
Embodiment
Below the present invention is described in detail.
The liquid crystal material layer that the orientation of the used liquid crystal of the present invention is fixed is the layer that is fixed by the method that adopts the liquid crystal material that fixedly is in state of orientation, as fixing method, can enumerate after being fixed as the method for glassy state under the situation of high molecule liquid crystal material by the state of orientation quenching and will having the low molecule or high molecule liquid crystal material orientation of reactive functional groups, make method that described functional group reactions (solidify or crosslinked etc.) fixes etc.
As described reactive functional groups, can enumerate vinyl, (methyl) acryloyl group, ethyleneoxy, epoxy radicals, oxa-cyclobutyl, carboxyl, hydroxyl, amino, isocyanate group, acid anhydrides etc., adopt the suitable method of group separately to react.
Operable liquid crystal material in the liquid crystal material layer, can be according to the purpose purposes or the manufacture method of liquid crystal film, select from the broad range of low molecular weight liquid crystal material, high molecule liquid crystal material, but preferred high molecule liquid crystal material, and the molecular shape of liquid crystal material can be bar-shaped or discoid.For example also can use the disk liquid-crystal compounds that shows as the disk nematic liquid crystal.
As the liquid crystal phase of liquid crystal material layer before fixing, can enumerate nematic phase, twisted nematic phase, cholesterol nematic phase, compound nematic phase, compound twisted nematic phase, disk nematic phase or dish shape nematic phase etc.
As described high molecule liquid crystal material, can use various straight chain polymer liquid crystal materials, side chain high molecule liquid crystal material or its various potpourris.As the straight chain polymer liquid crystal material, can enumerate macromolecule liquid crystal materials such as polyesters, polyamide-based, polyimide, polyurethanes, polybenzimidazoles class, polybenzoxazoles class, polybenzothiozole class, poly-azomethine class, polyesteramide class, polyestercarbonate class, polyester-imide class, or its potpourri etc.In addition, as side chain high molecule liquid crystal material, can enumerate and on material, connect as the high molecule liquid crystal material of the rod shaped liquid crystal base of side chain or the potpourri of these materials with straight chain such as polyacrylate, polymethacrylate, polyethylene kind, polysiloxane-based, polyethers, poly-malonate class, polyesters or cyclic skeleton structure.Wherein, consider the polyesters of preferred straight chain polymer liquid crystal material from the aspects such as complexity of synthetic or orientation.
As the low molecular weight liquid crystal material, can enumerate to introduce and add composition that cross-linked compound forms etc. in the liquid crystal compounds of described reactive functional groups or the compound in described these compounds with liquid crystal liquid crystal property at the end of saturated benzene carboxylic acid, unsaturated benzene carboxylic acid, biphenyl carboxylic acids class, aromatic series oxidation carboxylic acids, Schiff bases, bisdiazo methine compounds, azo compound, azoxy compounds, cyclohexane ester type compound, phytosterin compound etc.In addition, can enumerate benzophenanthrene class, tribenzyl-benzene class etc. as the disk liquid-crystal compounds.
In addition, in not hindering the scope that manifests liquid crystal liquid crystal property, can in liquid crystal material, add and have the functional group that heat or photo-crosslinking etc. can take place or all cpds at position.As the functional group that cross-linking reaction can take place, can enumerate above-mentioned various reactive functional groups etc.
The formation method of the liquid crystal material layer that liquid crystal aligning is fixed is, by the following method described liquid crystal material or the composition that contains as required all cpds that adds are coated on the orientation substrate or the solution of said composition with molten condition and are coated on the orientation substrate, to be coated on film drying, thermal treatment (orientation of liquid crystal) on the orientation substrate then, and adopt the method for fixing described orientation such as rayed and/or heat treated (polymerization, crosslinked) as required.
About preparing the solvent that uses in the described solution, as long as it is to dissolve liquid crystal material and the composition that uses among the present invention, and the solvent that can remove then is not particularly limited under proper condition, the preferred usually ketones such as acetone, methyl ethyl ketone, isophorone that use; Butyl cellosolve, own ethoxy-ethanol, methoxy-ether alcohol classes such as 2-propyl alcohol; Gylcol ether such as glycol dimethyl ether, diethylene glycol dimethyl ether; Ester classes such as ethyl acetate, acetic acid methoxy propyl ester, ethyl lactate; Phenols such as phenol, chlorophenol; N, amide-types such as dinethylformamide, N,N-dimethylacetamide, N-Methyl pyrrolidone; Halogenated hydrocarbon or its all kinds of mixed systems such as chloroform, tetrachloroethane, dichloro-benzenes.In addition, in order on orientation substrate, to form uniform film, can in solution, add surfactant, defoamer, levelling agent etc.And in not hindering the scope that manifests liquid crystal liquid crystal property, be that purpose can be added dichromatic dye, conventional dyestuff or pigment etc. with dyeing.
For painting method, so long as can guarantee the inhomogeneity method of filming, then have no particular limits, can adopt known method.For example can enumerate spin-coating method, mould is coated with method, dip coating, curtain and is coated with method, spraying process etc.Can also increase the operation of utilizing heating or removing desolvate (drying) with methods such as warm winds after the coating.The thickness that applies the caudacoria drying regime is 0.1 μ m～50 μ m, is preferably 0.2 μ m～20 μ m, more preferably 0.3 μ m～10 μ m.Outside this scope, can cause the orientation of the optical property deficiency of the liquid crystal material layer that obtains or liquid crystal material insufficient etc., so be not preferred.
Then, if desired, can be by the orientation of formation liquid crystal such as thermal treatment, what be orientated afterwards is fixing again.Thermal treatment is meant film is heated to the temperature range that manifests liquid crystal phase, and self alignment capability of utilizing that liquid crystal material itself has makes liquid crystal aligning.As heat treated condition, according to the liquid crystal phase behavior temperature (inversion temperature) of the liquid crystal material that uses, its top condition is different with boundary value, thus cannot treat different things as the same, but be generally 10～300 ℃, be preferably 30～250 ℃.Under very low temperature, the problem that exists liquid crystal aligning fully not carry out at high temperature, exists liquid crystal material to decompose and produces problem to the bad influence of orientation substrate.In addition, about heat treatment time, be generally 3 seconds～60 minutes, be preferably 10 seconds～30 minutes.Heat treatment time than 3 seconds after a little while, have the incomplete problem of orientation of liquid crystal, and heat treatment time is when surpassing 60 minutes, productivity extremely worsens, so these two kinds of conditions are not preferred.Liquid crystal material adopts the method that is suitable for used liquid crystal material, the liquid crystal material layer on fixed orientation substrate under this state after finishing orientation by thermal treatment etc.
As described orientation substrate, can enumerate the example of the film of polyimide, polyamide, polyamide-imides, polyphenylene sulfide, polyphenylene oxides, polyetherketone, polyetheretherketone, polyethersulfone, polysulfones, poly-terephthalic acids second diester, poly-naphthoic acid second diester, polyarylate, triacetyl cellulose, epoxy resin, phenolics etc.
Difference according to manufacture method, even these films do not make the improved processing of the performance of alignment capability, it also can show sufficient alignment capability to the liquid crystal material that the present invention uses, insufficient or when not having alignment capability etc. when alignment capability, can use the film that makes its performance alignment capability by following processing, for example these films suitably be added hot-stretch; Along same direction friction, carry out so-called friction treatment with Artificial Fibers cloth etc.; The alignment films that known alignment agent such as polyimide, polyvinyl alcohol (PVA), silane coupling agent forms is set on the film, carries out friction treatment then; The rhombus vapor deposition treatment of silicon dioxide etc.; Perhaps carry out the appropriate combination processing of these methods etc.
In addition, as orientation substrate, can use the surface to be provided with the sheet metal such as aluminium, iron, copper of the minute groove of a plurality of rules or various glass plates etc.
Here the orientation process direction to the orientation substrate film has no particular limits, handle according to above-mentioned each of on any one direction, carrying out, can select suitable orientation, when particularly handling the liquid crystal film that forms on the long orientation substrate, preferably with respect to the MD direction of long continuous film, with predetermined angular, carry out orientation process along tilted direction as required.Carry out orientation process by direction along predetermined angular, liquid crystal film is carried out when stacked with the axial arrangement that can bring into play optimised optical properties, in the applying (so-called axle is fitted to axle) of the state of the MD that realizes possessing long film, perhaps extremely valuable at the aspects such as yield rate that improve goods.
Then, the liquid crystal material layer that forms on the orientation substrate engages with releasable substrate or macromolecule oriented film by the cement layer.
This cement layer has sufficient engaging force to liquid crystal material layer and releasable substrate or macromolecule oriented film, and can realize peeling off of releasable substrate in subsequent handling, as long as it does not damage the optical characteristics of liquid crystal material layer and macromolecule oriented film, it is had no particular limits, for example, can enumerate acrylic resin, methacrylic resin, epikote, the ethylene-vinyl acetate analog copolymer, rubber-like, polyurethanes, glymes and its all kinds of potpourris, perhaps thermohardening type and/or light-cured type, various reactive materials such as electron ray curing type.The material that contains the transparency protected layer function that has protection liquid crystal material layer concurrently in these cements.In addition, also can be with adhesive phase as described cement layer.And the cement as the first cement layer and the use of the second cement layer can use identical cement.In addition, whether identical to the first cement layer without any restriction with the second cement layer.
The reaction of described reactive materials (curing) condition changes according to condition such as the composition, viscosity and the temperature of reaction that constitute cement, so the condition that can select to be fit to each factor is reacted.For example, be under the situation of reactive materials of light-cured type at cement, preferred add various known light triggers, with metal halide lamp, high-pressure sodium lamp, low pressure mercury lamp, xenon lamp, arc lamp, laser, radiate the rayed of light sources such as light source synchronously, react.As the exposure of per unit area (1 square centimeter), calculate with the accumulative total exposure, be generally 1～2000mJ, preferred 10～1000mJ.But the absorption region of light trigger and the visibly different situation of the wave spectrum of light source or reactive compounds have the situation of receptivity not in this scope from the wavelength coverage in light source.Under these situations, can adopt method of sneaking into suitable light sensitizer or sneaking into the light trigger that absorbing wavelength is different more than 2 kinds or 2 kinds etc.Be that accelerating potential is generally 10kV～200kV, is preferably 50kV～100kV under the situation of reactive materials of electron ray curing type at cement.
As mentioned above, the thickness of cement layer is different because of the intensity of the composition that constitutes cement, cement or serviceability temperature etc., but is generally 1～50 μ m, is preferably 2～30 μ m, more preferably 3～10 μ m.Outside this scope, there is the undercapacity of cement or from problems such as end seepages, so be not preferred.
In addition, in the scope of not damaging the cement characteristic, be purpose with the fissility or the corrosivity of control optical characteristics or control basal plate, can in these cements, add various particulates etc. or interpolation surface modifier.
As described particulate; can enumerate refractive index and the different particulate of compound that constitutes cement; do not damage electrically conductive microparticle that the transparency is used for improving antistatic performance, be used for particulate that improves abrasion performance etc., more specifically can enumerate silicon dioxide microparticle, alumina particulate, ITO (tin indium oxide) particulate, silver-colored particulate or various synthetic resin particulates etc.
As described surface modifier, the curable that requires the compatibility of itself and cement good, do not influence cement or solidify after optical property, other are not particularly limited, and water soluble surfactant active, oil soluble surfactant, high molecular surfactant, the fluorine that can use ion-type, nonionic is organic metal class surfactant, reactive surfactants etc. such as surfactant, silicone.Particularly fluorine such as all-fluoroalkyl compound, per-fluoro polyether compound is that the surfaction effect of organic metal class surfactants such as surfactant or silicone is obvious, so especially preferably use.The addition of surface modifier preferably accounts for 0.01～10 weight % of cement, more preferably accounts for 0.05～5 weight %, further preferred 0.1～3 weight %.Addition than described scope after a little while, it is insufficient to add the back effect, and too much the time, produces shortcomings such as bond strength excessive descent.In addition, surface modifier can use separately, also can share the kinds of surface modifying agent as required.
In the scope that does not influence effect of the present invention, can also add various adjuvants such as antioxidant, ultraviolet light absorber.
Releasable substrate as the present invention uses can use olefine kind resins such as tygon, polypropylene, 4-methylpentene-1 resin; Polyamide, polyimide, polyamidoimide, polyetheramides, polyetherketone, polyetheretherketone, polyethersulfone, the polyketone thioether, polysulfones, polystyrene, polyphenylene sulfide, polyphenylene oxide, poly-terephthalic acids second diester, Polybutylene Terephthalate, polyarylate, polyacetal, the uniaxial tension polyester, polycarbonate, polyvinyl alcohol (PVA), polymethylmethacrylate, polyarylate, amorphous poly alkene, norbornene resin, the film of triacetyl cellulose or epoxy resin etc.
Particularly, can enumerate the various films of 4-methylpentene-1, polymethylmethacrylate, polystyrene, polycarbonate, polyethersulfone, polyarylate, amorphous poly alkene, norbornene resin, triacetyl cellulose or epoxy resin etc. as the optically isotropic film that on the inspectability of optical defect, has the excellent transparency.
In order to make these plastic sheetings have suitable fissility, can perhaps form organic film or inorganic thin film in advance at its surface-coated silicone.In addition, for same purpose, also can carry out physical treatments such as chemical treatments such as basification or halation processing on the plastic sheeting surface.
In addition, in order to adjust the fissility of releasable substrate, can also in described plastic sheeting, contain lubricant or surface modifier.As described lubricant,, its kind, addition are had no particular limits as long as it does not produce harmful effect to the inspectability or the fissility of optical defect.As the object lesson of lubricant, can enumerate silicon dioxide microparticle, alumina particulate etc., as the index of addition, the turbidity value of releasable substrate is generally below 50% or 50%, below preferred 30% or 30%.When addition is very few, can not see additive effect, and addition for a long time, the inspectability of optical defect reduces, so be not preferred.
In addition, as required, can also contain other known various adjuvants, for example anticaking agent, antioxidant, antistatic agent, thermal stabilizer, resistance to impact modifying agent etc.
About the stripping ability of releasable substrate, even the releasable substrate of being made by same material also changes because of manufacture method, surface state or with the lubricant nature of the cement that uses etc., so cannot treat different things as the same.Be generally 0.38～12N/m with the interface peel ability of cement (180 ° peel off, peeling rate is 30cm/ minute, room temperature measuring), be preferably 0.38～8.0N/m.Under the situation of stripping ability less than this value, liquid crystal material layer on the orientation substrate is when peeling off orientation substrate after the releasable substrate engages, occur attached on the releasable substrate owing to stripping ability is low, can not obtain having the state of well peeling off at required interface, cause the transcription of liquid crystal material course releasable substrate insufficient; And under the too high situation of stripping ability, when peeling off the releasable substrate, the liquid crystal material layer is destroyed or can not be along with the interface peel of required layer etc., so be not preferred.
In addition, the thickness of releasable substrate also can influence fissility sometimes, so the thickness of preferred releasable substrate is 16～100 μ m, and preferred especially 25～50 μ m.When thickness is blocked up, pick-up point instability, the problem that exists fissility to worsen; And cross when thin, can not keep the physical strength of film, produce problem such as tear to shreds in making so exist.
As the macromolecule oriented film that the present invention uses, can enumerate the single shaft or the biaxial stretching phase difference film that form by cellulose family, polycarbonate-based, polyaryl compounds, polysulfones, polyvinyl alcohol (PVA) (PVA) class, polyacrylic, polyether sulfone, cyclic polyolefin hydro carbons etc.The uniaxially-stretched film of cyclic polyolefin hydro carbons such as wherein polycarbonate-based, norborene class is being preferred aspect easy degree, uniformity of film or the optical characteristics made.
Here draw direction is had no particular limits, go up in any direction all and can carry out, selection that can be suitable.When particularly handling long macromolecule oriented film, preferably,, as required, handle along tilted direction (oblique extension) or TD direction (cross directional stretch) with predetermined angular with respect to the MD direction of this long continuous film.By direction stretch processing along predetermined angular, the axial arrangement of being brought into play with optimised optical properties is carried out oriented film and liquid crystal film or polaroid stacked, at this moment, in the applying (so-called axle is fitted to axle) of the state of the MD that realizes possessing long film, perhaps extremely valuable at the aspects such as yield rate that improve goods.
Polaroid for the present invention uses as long as it is the polaroid that can reach the object of the invention, has no particular limits it, can suitably use polaroid commonly used in the liquid crystal indicator, the film-type polaroid of the preferred listing of exploitation in recent years.Specifically can use polarization film that absorption iodine in the hydrophilic macromolecule film that the part alkali compound etc. of PVA class polarization films such as polyvinyl alcohol (PVA) (PVA) or part acetalation PVA, ethylene-vinyl acetate copolymer forms and/or the polarization film of double-colored pigment after stretching, the processed thing of PVA or the polyene oriented films such as desalination acid treatment thing of polyvinyl chloride etc. form etc.In addition, also can use the reflective polarizing film.
Can use polarization film separately in the described polaroid, also can be used for protective clear layer that improves intensity, moisture-proof, thermotolerance etc. etc. in the one or both sides setting of polarization film.As protective clear layer, can enumerate directly or pass through light-cured type resin beds such as the protective clear layer of transparent plastic films such as folded layer by layer polyester of cement or triacetyl cellulose, coat, acrylic compounds or the epoxies of resin etc.When these protective clear layers were covered the two sides of polarization film, its two sides can be provided with identical protective clear layer, also different protective clear layers can be set.
Manufacture method to optical laminate of the present invention is elaborated below.
Method 1
Manufacture method as the liquid crystal material layer does not have specific limited, for example can make in order to following method.
At first, on orientation substrate, form filming of liquid crystal material, remove solvent etc. as required, wait the orientation of finishing liquid crystal, adopt the orientation of the method immobile liquid eutectic substance layer that is fit to used liquid crystal material by heating with suitable method.Then, on the fixing liquid crystal material layer of orientation, form the cement layer, with liquid crystal material layer and releasable substrate fluid-tight engagement, afterwards, peel off orientation substrate after making cement layer reaction (curing) as required by the cement layer.
Like this, can make the fixing liquid crystal material layer transcription of orientation on the releasable substrate.Thereby obtain being bonded on liquid crystal material layer on the releasable substrate by the cement layer.
In order to protect the surface of the liquid crystal material layer that obtains, can on exposed liquid crystal material layer, transparent protective seam be set, also can the adhesive surface protective film.Herein, as protective clear layer, can from described cement, select.
That is to say,, can enumerate as the layer structure of the present invention of the liquid crystal material layer that on the releasable substrate, forms by the cement layer
1. releasable substrate/first cement layer/liquid crystal material layer (duplexer (A))
2. releasable substrate/first cement layer/liquid crystal material layer/second cement layer (duplexer (B)) etc.
"/" represents the interface of each layer in the superincumbent description, and following statement is identical.
Laminating method to optical laminate of the present invention describes below.
The 1st operation is for making described duplexer (A).
Secondly, in the 2nd operation, close the macromolecule oriented film by bonding agent or cement laminating after, peel off the releasable substrate; After perhaps making described duplexer (A), peel off the releasable substrate, the macromolecule oriented film of fitting then, thus obtain duplexer as described below.
1. cement layer/liquid crystal material layer/bonding agent (cement)/macromolecule oriented film
2. liquid crystal material layer/cement layer/bonding agent (cement)/macromolecule oriented film
3. cement layer/liquid crystal material layer/cement layer/bonding agent (cement)/macromolecule oriented film
Then, in the 3rd operation, can obtain optical laminate of the present invention by bonding agent or the cement layer polaroid of on described duplexer, fitting.
Like this, have no particular limits, but will pass through these operations at least, just can obtain the optical laminate of the present invention of following composition.
1. polaroid/bonding agent (cement)/cement layer/liquid crystal material layer/bonding agent (cement) layer/macromolecule oriented film
2. polaroid/bonding agent (cement)/liquid crystal material layer/cement layer/bonding agent (cement) layer/macromolecule oriented film
3. polaroid/bonding agent (cement)/cement layer/liquid crystal material layer/cement layer/bonding agent (cement) layer/macromolecule oriented film
4. cement layer/liquid crystal material layer/bonding agent (cement) layer/macromolecule oriented film/bonding agent (cement) layer/polaroid
5. liquid crystal material layer/cement layer/bonding agent (cement) layer/macromolecule oriented film/bonding agent (cement) layer/polaroid
6. cement layer/liquid crystal material layer/cement layer/bonding agent (cement) layer/macromolecule oriented film/bonding agent (cement) layer/polaroid
Method 2
In addition, among the present invention, at least after the liquid crystal material layer that is fixed through the liquid crystal aligning that forms on the orientation substrate passes through the cement layer and the macromolecule oriented film engages, peel off orientation substrate, with the transcription of liquid crystal material layer on the macromolecule oriented film, obtain duplexer by the macromolecule oriented film/the cement layer/the liquid crystal material layer forms, then by bonding agent or cement layer, operation at the macromolecule oriented film face or the liquid crystal material aspect applying polaroid of this duplexer can obtain optical laminate.
Here,, adopt suitable method on orientation substrate, to form liquid crystal material and film, remove solvent etc. as required, wait the orientation of finishing liquid crystal, adopt the orientation of the method immobile liquid eutectic substance layer that is fit to used liquid crystal material by heating as the liquid crystal material layer.In order to protect the surface of the liquid crystal material layer that obtains, can on exposed liquid crystal material layer, transparent protective seam be set, also can the adhesive surface protective film.Herein, as protective clear layer, can from described cement, select.
By cement at the above-mentioned liquid crystal material aspect applying macromolecule oriented film that obtains, thereby can obtain duplexer by the macromolecule oriented film/the cement layer/liquid crystal material layer/orientation substrate constitutes.
Peel off orientation substrate from this duplexer then, with the liquid crystal material transcription on the macromolecule oriented film.At this, in order to protect the surface, can on exposed liquid crystal material layer, protective clear layer be set, also can the coating surface protective film.As protective clear layer, can from described cement, select.
Can obtain duplexer as follows like this.
1. macromolecule oriented film/first cement layer/liquid crystal material layer
2. macromolecule oriented film/first cement layer/liquid crystal material layer/second cement layer
By by bonding agent or cement layer, macromolecule oriented film face, liquid crystal material aspect or cement aspect applying polaroid at described duplexer can obtain optical laminate of the present invention.
Method 3
Manufacture method as the liquid crystal material layer does not have specific limited, for example can make in order to following method.
At first, on orientation substrate, form filming of liquid crystal material, remove as required and desolvate etc., wait the orientation of finishing liquid crystal, adopt the orientation of the method immobile liquid eutectic substance layer that is fit to used liquid crystal material by heating with suitable method.Then, on the fixing liquid crystal material layer of orientation, form the first cement layer, with the liquid crystal material layer and the first releasable substrate fluid-tight engagement, afterwards, peel off orientation substrate after making first cement layer reaction (curing) as required by the first cement layer.Then, engage the liquid crystal material layer and the second releasable substrate by the second cement layer, peel off the first releasable substrate,, can obtain the duplexer (B) that constitutes by first cement layer/liquid crystal material layer/second cement layer/second releasable substrate to the second releasable substrate transcription.Herein, the first and second releasable substrates can use identical or different film.
On the duplexer that obtains transparent protective seam can also be set, also can the coating surface protective film.
Laminating method to optical laminate of the present invention describes below.
The 1st operation is for making described duplexer (B).Secondly, in the 2nd operation, close the macromolecule oriented film by bonding agent or cement laminating, obtain by the second releasable substrate/second cement layer/liquid crystal material layer/first cement layer/adhesive phase or duplexer that the cement layer/the macromolecule oriented film constitutes, then, in the 3rd operation, peel off the second releasable substrate of described duplexer, by the polaroid of on the second cement layer or macromolecule oriented film, fitting, can obtain optical laminate of the present invention.
Through these operations, can obtain the optical laminate of following composition.
1. polaroid/bonding agent (cement) layer/cement layer/liquid crystal material layer/cement layer/bonding agent (cement) layer/macromolecule oriented film
2. polaroid/bonding agent (cement) layer/macromolecule oriented film/bonding agent (cement) layer/cement layer/liquid crystal material layer/cement layer
In addition, among the present invention, liquid crystal material layer on the orientation substrate that can also orientation is fixing, transcription liquid crystal material layer or the macromolecule oriented film to the releasable substrate carries out stackedly repeatedly by bonding agent or cement layer, make that liquid crystal material layer and macromolecule oriented film are stacked to be multilayer.
In addition, in manufacturing process of the present invention, under the state of still residual orientation substrate of one side or releasable substrate, at the back side of this orientation substrate or the fit bonding agent of subsidiary abscission layer of the back side of releasable substrate, by peeling off this orientation substrate or releasable substrate, the abscission layer of bonding agent can be handled as new fissility support substrate.If adopt this method, this bonding agent just not only can be used as the bonding agent that is used for stacked optical laminate of the present invention or is used for the bonding agent of stacked liquid crystal cell or other optical element, and arbitrary overturn binding face etc. up and down, make and make degree of freedom and further enlarge.
Among the present invention, on its plate face, be pre-formed the abscission layer that to peel off from this substrate, therefore between liquid crystal material layer and other layer, also can form abscission layer because the releasable substrate that uses has.Owing to formed the detachment layer, thus the stress cut-off effect of the appearance change of the liquid crystal material layer of film can obtain to suppress to make the time or during environmental test (for example, fluctuation etc.).Abscission layer is not had special qualification herein, be preferably optically isotropic hyaline layer, for example can enumerate the potpourri of polymkeric substance such as acrylic compounds, methacrylic, NC Nitroncellulose class, epoxy compounds and these materials.Abscission layer is that thickness is 0.3 μ m～40 μ m, is preferably 0.5 μ m～10 μ m, vitrifacation inversion point (Tg) is more than 20 ℃ or 20 ℃, preferred optically isotropic hyaline layer more than 50 ℃ or 50 ℃, as long as the optical characteristics of not obvious damage liquid crystal material layer and macromolecule oriented film, its material is not particularly limited.If thickness and vitrifacation inversion point beyond described scope, then poor effect, can not reach the film thinning of one of the object of the invention, so be not preferred.
Described abscission layer can by add crosslinked composition carry out partial cross-linked, by adding plasticizer, add lubricant etc., the control physical property.
Formation method for abscission layer does not have special qualification yet; can enumerate for example on releasable substrate film such as tygon, polypropylene, polyethylene terephthalate; adopt the methods such as material that apply, extrude detachment layer to be pre-formed abscission layer with described thickness; by the fit method of this layer and of bonding agent or cement layer or protective clear layer, peel off the transfer method of releasable substrate film etc. then by bonding agent or cement layer or protective clear layer this layer of closely adhering.
Optical laminate of the present invention can also comprise 1 layer or multilayer anti-reflection layer, non-glare treated layer, hard layer, light diffusion layer except that polaroid, liquid crystal material layer and macromolecule oriented film.Fit with polaroid or engage used cement etc., so long as optical grade other get final product, do not have special qualification, for example can use described suitable cement.
The gross thickness of the optical laminate of as above making of the present invention is 450 μ m or below the 450 μ m, is preferably 350 μ m or below the 350 μ m, more preferably 300 μ m or below the 300 μ m.If beyond described scope, because of can not reaching the film thinning of one of the object of the invention, rather than preferred.
The optical parametric of corresponding liquid crystal material layer and macromolecule oriented film, optical laminate of the present invention can be brought into play compensating element,, the ellipsoidal polarizing plate of various liquid crystal indicators, the effect of circular polarizing disk.
That is to say, constitute the liquid crystal material layer of optical laminate, for example the liquid crystal material layer that is fixed to row orientations, twisted nematic orientation has the effect of phase difference plate, uses so can be used as the compensating plate of transmission such as STN type, TN type, OCB type, HAN type or reflection-type liquid-crystal display device as the optical laminate of the present invention of structural detail with this liquid crystal material layer.
In addition, the delay of the liquid crystal material layer utilization that is fixed to the row hybrid orientation when the front is seen, can be used as phase difference film or wave resistance plate uses, in addition, because produce asymmetry in length of delay direction (molecular axis direction of film thickness direction), element etc. is improved at the visual angle that can be used for TN type liquid crystal indicator.
In addition, the liquid crystal material layer for having 1/4 wave resistance plate function makes up polaroid as the present invention, and what can be used as circular polarizing disk, reflection-type liquid-crystal display device or EL display device prevents uses such as reflective film.Particularly aspect the wide wavestrip 1/4 wave resistance plate that plays a role in the wide wavestrip that obtains crossing over the visible light scope, it has been generally acknowledged that the birefringent light under the monochromatic light of 550nm is differed the 1/2 wave resistance plate that birefringent light under the monochromatic light of 1/4 wave resistance plate of nearly 1/4 wavelength and 550nm differs nearly 1/2 wavelength, the state that intersects with their slow axis is stacked to be effectively, and has been widely used in the reflection-type liquid-crystal display device in fact.That is to say, adopt the technology of the optical laminate that obtains thinning as in the present invention, can obtain the ultrathin broadband 1/4 wave resistance plate that in the past only was difficult to obtain with the macromolecule oriented film.At this, the length of delay of 1/4 wave resistance plate is generally 70nm～180nm, is preferably 90nm～160nm, preferred especially 120nm～150nm.In addition, the length of delay of 1/2 wave resistance plate is generally 180nm～320nm, is preferably 200nm～300nm, preferred especially 220nm～280nm.There is the unnecessary coloring problem of generation in the liquid-crystal apparatus in the delay scope of 1/4 wave resistance plate and 1/2 wave resistance plate beyond the described scope time.In addition, the length of delay product representation of birefringence n and thickness d.
In addition, in the optical laminate of the present invention, the liquid crystal material layer that constitutes this duplexer is so long as the fixing material of cholesterol orientation or dish shape orientation, just can be used to improve reflection of polarization film, reflection-type coloured film that brightness uses, originate from local reflex can owing to visual angle change produces the various Security elements of reflected light change color or decorating film etc.
(embodiment)
Below, be example to make circular polarizing disk, illustrate in greater detail the present invention by embodiment and comparative example, but the present invention is not limited to this.In addition, do not have the specified otherwise part in the present embodiment, length of delay (birefringence n and thickness d are long-pending) is the value at wavelength 550nm.
(preparation example 1)
With 2 of the terephthalic acids of 50mmol, 50mmol, the methyl chinol diacetate of 6-naphthalene dicarboxylic acids, 40mmol, the sterol diacetate of 60mmol and the N-methylimidazole of 60mg in nitrogen atmosphere, in 270 ℃, carry out 12 hours condensation polymerization.Then, the resultant of reaction that obtains is dissolved in tetrachloroethane after, by precipitating again, make with extra care with methyl alcohol, obtain the 14.6g liquid crystalline polyester.The logarithm viscosity of this liquid crystalline polyester (polymkeric substance-1) (phenol/tetrachloroethane (6/4 weight ratio) mixed solvent: 30 ℃) is 0.16dl/g, has nematic phase as liquid crystal phase, isotropic phase-liquid crystal phase inversion temperature is more than 250 ℃ or 250 ℃, and the glass transition temperature that Differential Scanning Calorimeter (DSC) records is 112 ℃.
The N-N-methyl-2-2-pyrrolidone N-that the polymkeric substance-1 of 20g is dissolved in 80g is prepared into solution.With spinner this solution is coated in on the Kapton (trade name " kapton " (カ プ ト Application) E.I.Du Pont Company's system) after the Artificial Fibers cloth friction treatment, behind the dry removal solvent,, forms to the row orientation texture 210 ℃ of thermal treatments 20 minutes.After the thermal treatment, cool to room temperature, fixing to the row orientation texture, obtain that actual thickness is the uniform liquid crystal material layer of orientation of 0.7 μ m on the Kapton.Actual thickness is measured by the contact pin type film thickness gauge.
(preparation example 2)
Adopt the method same, obtain that actual thickness is the uniform liquid crystal material layer of orientation of 1.4 μ m on the Kapton with preparation example 1.
(embodiment 1)
(with the Kapton opposing backside surface) applies the thick commercially available UV curing type cement (UV-3400 of 5 μ m on the liquid crystal material layer that preparation example 1 obtains, East Asia synthetic (strain) system), as the first cement layer, stacked thickness is the first releasable substrate of 25 μ m on it, be polyethylene terephthalate (PET) film 1 (S10, Toray company), by shining the UV of about 600mJ, this first cement layer is solidified.Then, the duplexer that forms one from PET film 1/ first cement layer/liquid crystal material layer/Kapton is peeled off Kapton, thereby the transcription of liquid crystal material layer to the PET film 1 as the first releasable substrate, obtained by PET film 1/ first duplexer (A) that the cement layer/the liquid crystal material layer constitutes.Herein, peel off PET film 1 after, the Δ nd of duplexer (A) is 140nm.
Apply the thick commercially available UV curing type cement (UV-3400) of 5 μ m on the liquid crystal material layer of duplexer (A), as the second cement layer, (thick be 60 μ m to stacked commercially available uniaxial tension polycarbonate film on it, Δ nd is 270nm), then by shining the UV of about 600mJ, this second cement layer is solidified, obtain by the PET film duplexer that 1/ first cement layer/liquid crystal material layer/second cement layer/polycarbonate film constitutes.
The polycarbonate face of this duplexer is fitted and is formed polaroid (the about 180 μ m of thickness of adhesive phase in advance in one side, Sumitomo Chemical (strain) system SQW-862) after, peel off PET film 1, obtain the circular polarizing disk of the present invention that polaroid/adhesive phase/polycarbonate film/second cement layer/liquid crystal material layer/first cement layer constitutes.The gross thickness of this circular polarizing disk is 277 μ m.
(embodiment 2)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the circular polarizing disk that bonding agent adhesive embodiments 1 obtains, estimate display characteristic, its result, any one circular polarizing disk all presents good demonstration on reflective-mode and transmission mode.In addition, this display device is carried out following two kinds of endurancings, 1. under 60 ℃, 90%RH, carried out 500 hours, 2. carried out 500 hours at 80 ℃, drying regime, its result think any all do not come off and outward appearance such as crackle unusual.
(embodiment 3)
(with the Kapton opposing backside surface) applies the thick commercially available UV curing type cement (UV-3400 of 5 μ m on the liquid crystal material layer that preparation example 2 obtains, East Asia synthetic (strain) system), as the cement layer, (thick be 60 μ m to stacked commercially available uniaxial tension polycarbonate film on it, Δ nd is 275nm), by shining the UV of about 600mJ, this cement layer is solidified., peel off Kapton from this duplexer thereafter, thus with the transcription of liquid crystal material layer to polycarbonate film, obtain duplexer by polycarbonate film/the cement layer/the liquid crystal material layer constitutes.
Then, the polycarbonate film face of this duplexer is bonding to form the polaroid that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the circular polarizing disk of the present invention that polaroid/adhesive phase/polycarbonate film/cement layer/liquid crystal material layer constitutes.The gross thickness of this circular polarizing disk is 272 μ m.
(embodiment 4)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the circular polarizing disk that bonding agent adhesive embodiments 3 obtains, estimate display characteristic, its result, any one circular polarizing disk all presents good demonstration on reflective-mode and transmission mode.In addition, this display device is carried out following two kinds of endurancings, 1. under 60 ℃, 90%RH, carried out 500 hours, 2. carried out 500 hours at 80 ℃, drying regime, its result think any all do not come off and outward appearance such as crackle unusual.
(embodiment 5)
(with the Kapton opposing backside surface) applies the thick commercially available UV curing type cement (UV-3400 of 5 μ m on the liquid crystal material layer that preparation example 1 obtains, East Asia synthetic (strain) system), as the first cement layer, stacked thickness is the first releasable substrate of 25 μ m on it, be polyethylene terephthalate (PET) film 1 (S10, Toray company), by shining the UV of about 600mJ, this first cement layer is solidified.Then, the duplexer that forms one from PET film 1/ first cement layer/liquid crystal material layer/Kapton is peeled off Kapton, thus with the transcription of liquid crystal material layer to PET film 1 as the releasable substrate.Coating thickness is the commercially available UV curing type cement (UV-3400) of 5 μ m on the liquid crystal material layer then, as the second cement layer, stacked thickness is the second releasable substrate of 25 μ m on it, be polyethylene terephthalate (PET) film 2 (S10), by shining the UV of about 600mJ, this second cement layer is solidified.Then, peel off PET film 1, obtain duplexer (B) by first cement layer/liquid crystal material layer/second cement layer/PET film 2 constitutes.Herein, peel off PET film 2 after, the Δ nd of duplexer (B) is 140nm.
By thickness is the bonding agent of 25 μ m, (thick is 60 μ m for stacked duplexer (B) and commercially available uniaxial tension polycarbonate film, Δ nd is 270nm), obtain duplexer by polycarbonate film/adhesive phase/first cement layer/liquid crystal material layer/the second cement layer 2/PET film 2 constitutes.
The polycarbonate face of this duplexer is fitted and is formed polaroid (the about 180 μ m of thickness of adhesive phase in advance in one side, Sumitomo Chemical (strain) system SQW-862) after, peel off PET film 2, obtain the circular polarizing disk of the present invention that polaroid/adhesive phase/polycarbonate film/adhesive phase/first cement layer/liquid crystal material layer/second cement layer constitutes.The gross thickness of this circular polarizing disk is 300 μ m.
(embodiment 6)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the circular polarizing disk that bonding agent adhesive embodiments 5 obtains, estimate display characteristic, its result, any one circular polarizing disk all presents good demonstration on reflective-mode and transmission mode.In addition, this display device is carried out following two kinds of endurancings, 1. under 60 ℃, 90%RH, carried out 500 hours, 2. carried out 500 hours at 80 ℃, drying regime, its result think any all do not come off and outward appearance such as crackle unusual.
(comparative example 1)
With thickness is that the bonding agent of 25 μ m fits that (thickness is 60 μ m to commercially available uniaxial tension polycarbonate film 1, Δ nd is 135nm) and polycarbonate film 2 (thickness is 60 μ m, Δ nd is 270nm), obtain the duplexer that polycarbonate film 1/ adhesive phase/polycarbonate film 2 constitutes.
Face at the polycarbonate 2 of this duplexer, bondingly forming the polaroid that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the circular polarizing disk that polaroid/adhesive phase/polycarbonate film 2/ adhesive phase/polycarbonate film 1 constitutes.The gross thickness of this circular polarizing disk is 350 μ m.
(comparative example 2)
(thickness is 80 μ m at commercially available uniaxial tension norborene class film 1, Δ nd is 275nm, JSR (strain) makes transparent resin (ARTON)) one side to be fitted in advance the thickness that forms on the PET film that polysiloxane is handled be the adhesive phase of 25 μ m, then, in the do not fit one side of bonding agent of this film, fit and form the polaroid that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the duplexer of the PET film formation of polaroid/adhesive phase/norborene class film 1/ adhesive phase/polysiloxane processing.
Peel off the PET film that polysiloxane is handled from this duplexer, (thickness is 80 μ m to the uniaxial tension norborene class film 2 of fitting commercially available, Δ nd is 130nm, JSR (strain) makes transparent resin (ARTON)), obtain the circular polarizing disk that polaroid/adhesive phase/norborene class film 1/ adhesive phase/norborene class film 2 constitutes.The gross thickness of this circular polarizing disk is 390 μ m.
Can provide the liquid crystal material that not to have the support substrate film to be stacked in industrially preparing process on the macromolecule oriented film layer by layer according to the present invention, thereby the new optical laminate of the high performance when can obtain in the past only being difficult to obtain on optical characteristics and the thinning significantly of film etc. with the macromolecule oriented film, therefore, the inventive method has high commercial value.
Claims (7)
1. the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: (1) is bonded on the liquid crystal material layer that the liquid crystal aligning that forms on the orientation substrate is fixed on the releasable substrate by the cement layer, peel off orientation substrate then, the transcription of liquid crystal material layer on the releasable substrate, obtained the 1st operation by the duplexer (A) that the releasable substrate/the cement layer/the liquid crystal material layer forms; (2) duplexer (A) and macromolecule oriented film are bonded together by adhesive phase or cement layer, obtain the 2nd operation by releasable substrate/cement layer/liquid crystal material layer/adhesive phase or the duplexer that the cement layer/the macromolecule oriented film forms; And (3) peel off the releasable substrate of described duplexer, the 3rd operation of applying polaroid on cement layer or macromolecule oriented film.
2. the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is the liquid crystal material layer through the liquid crystal aligning that forms on the orientation substrate is fixed at least, engage with the macromolecule oriented film by the cement layer, peel off orientation substrate, with the transcription of liquid crystal material layer on the macromolecule oriented film, obtain duplexer by the macromolecule oriented film/the cement layer/the liquid crystal material layer forms, then by adhesive phase or cement layer, in the operation of the macromolecule oriented film face or the liquid crystal material aspect applying polaroid of this duplexer.
3. the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: (1) is bonded on the liquid crystal material layer that the liquid crystal aligning that forms on the orientation substrate is fixed on the first releasable substrate by the first cement layer, peel off orientation substrate then, with the transcription of liquid crystal material layer on the first releasable substrate, then by the second cement layer, engage the second releasable substrate and liquid crystal material layer, peel off the first releasable substrate, to the second releasable substrate transcription, obtain the 1st operation of the duplexer (B) that forms by first cement layer/liquid crystal material layer/second cement layer/second releasable substrate; (2) duplexer (B) and macromolecule oriented film are bonded together by bonding agent or cement, obtain the 2nd operation by the second releasable substrate/second cement layer/liquid crystal material layer/first cement layer/adhesive phase or the duplexer that the cement layer/the macromolecule oriented film forms; And (3) peel off the second releasable substrate of described duplexer, the 3rd operation of applying polaroid on the second cement layer or macromolecule oriented film.
4. as the manufacture method of each described optical laminate of claim 1～3, it is characterized by, described liquid crystal material layer is made of the liquid crystal material layer that is fixed to the row orientation that the liquid crystal material that shows as positive uniaxiality on the optics forms under mesomorphic state.
5. utilize the ellipsoidal polarizing plate of the optical laminate formation that obtains as each described manufacture method of claim 1～3.
6. utilize the circular polarizing disk of the optical laminate formation that obtains as each described manufacture method of claim 1～3.
7. possesses liquid crystal indicator at least as claim 5 or 6 described ellipsoidal polarizing plates or circular polarizing disk.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003015406A JP2004226758A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate, circularly polarizing plate, and liquid crystal display comprising the layered body |
| JP2003015403A JP2004226755A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate, circularly polarizing plate and liquid crystal display comprising the layered body |
| JP15403/2003 | 2003-01-23 | ||
| JP15407/2003 | 2003-01-23 | ||
| JP2003015407A JP2004226759A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate, circularly polarizing plate and liquid crystal display each comprising the layered body |
| JP15406/2003 | 2003-01-23 |
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|---|---|
| CN1519626A CN1519626A (en) | 2004-08-11 |
| CN100345041C true CN100345041C (en) | 2007-10-24 |
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| CNB2004100390757A Expired - Fee Related CN100345041C (en) | 2003-01-23 | 2004-01-29 | Mfg. method of optical stacker and LCD device |
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| KR (1) | KR100746806B1 (en) |
| CN (1) | CN100345041C (en) |
| TW (1) | TWI265325B (en) |
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| JP5945387B2 (en) * | 2011-04-26 | 2016-07-05 | 日東電工株式会社 | Method for producing optical laminate |
| WO2013136975A1 (en) * | 2012-03-15 | 2013-09-19 | 日本ゼオン株式会社 | Phase difference film laminate, method for producing phase difference film laminate, and method for producing phase difference film |
| JP5304939B1 (en) | 2012-05-31 | 2013-10-02 | 大日本印刷株式会社 | Optical laminate, polarizing plate, method for manufacturing polarizing plate, image display device, method for manufacturing image display device, and method for improving visibility of image display device |
| KR102535200B1 (en) * | 2015-01-30 | 2023-05-19 | 니폰 제온 가부시키가이샤 | Multilayer film, use thereof, and production method thereof |
| JP6641093B2 (en) * | 2015-03-20 | 2020-02-05 | 住友化学株式会社 | Defect inspection method for optical film and laminated optical film |
| KR102601679B1 (en) * | 2016-10-11 | 2023-11-10 | 동우 화인켐 주식회사 | Laminate, a polarizing plate including thereof and preparing method for the same |
| CN109036136A (en) * | 2018-08-10 | 2018-12-18 | 云谷（固安）科技有限公司 | Support membrane, display device and preparation method thereof |
| WO2020067291A1 (en) * | 2018-09-26 | 2020-04-02 | 富士フイルム株式会社 | Transfer film, polarizing plate, image display device, and method for producing polarizing plate |
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| JPH06308328A (en) * | 1993-04-22 | 1994-11-04 | Nippon Petrochem Co Ltd | Optical element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
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| JP3357003B2 (en) | 1999-01-29 | 2002-12-16 | セイコーエプソン株式会社 | Liquid crystal display device |
| JP3399463B2 (en) | 2000-12-21 | 2003-04-21 | 松下電器産業株式会社 | Color liquid crystal display device |
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2004
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- 2004-01-20 KR KR1020040004050A patent/KR100746806B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06308328A (en) * | 1993-04-22 | 1994-11-04 | Nippon Petrochem Co Ltd | Optical element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
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|---|---|
| TWI265325B (en) | 2006-11-01 |
| CN1519626A (en) | 2004-08-11 |
| KR20040067982A (en) | 2004-07-30 |
| KR100746806B1 (en) | 2007-08-06 |
| TW200422663A (en) | 2004-11-01 |
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