CN1313849C - Method for preparing liquid crystalline film and elliptically polarizing plate - Google Patents
Method for preparing liquid crystalline film and elliptically polarizing plate Download PDFInfo
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- CN1313849C CN1313849C CNB2003801015108A CN200380101510A CN1313849C CN 1313849 C CN1313849 C CN 1313849C CN B2003801015108 A CNB2003801015108 A CN B2003801015108A CN 200380101510 A CN200380101510 A CN 200380101510A CN 1313849 C CN1313849 C CN 1313849C
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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
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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
- G02B5/3016—Polarising elements involving passive liquid crystal elements
Abstract
A method for preparing a liquid crystalline thin film having no supporting substrate film, which comprises attaching a liquid crystalline substance layer having fixedly oriented liquid crystals formed on an orientation substrate onto a releasable substrate comprising a saponification-treated triacetyl cellulose film via an adhesive, releasing the orientation substrate to transfer the liquid crystalline substance layer onto the releasable substrate, and then releasing the releasable substrate. The method has allowed the preparation of a liquid crystalline thin film having no supporting substrate film which exhibits satisfactory mechanical strength and releasability during the preparation thereof and is easy to inspect its optical defects.
Description
Technical field
The present invention relates to a kind of liquid crystal film useful in various optical elements and the manufacture method of elliptical polarization plate.
Background technology
The film (film) that forms by the liquid-crystal compounds oriented layer, particularly by nematic structure, the perhaps element used as the colorimetric compensation or the view angle compensation of used for liquid crystal display element of the film that forms of the liquid crystal material that is fixed of twisted nematic structural approach, perhaps has excellent performance as optical activity optical element etc., expect that various display elements have higher performance, and alleviate quality.As the manufacture method of these films, proposed and will be transferred to method (spy opens flat 4-57017 communique, the spy opens flat 4-177216 communique) on the light-transmitting substrate of double as support substrate at the floor that constitutes by liquid crystal material that forms on the orientation substrate.In addition, the countermeasure of using with the strict endurancing of required tolerance in the element as liquid crystal display, for further making its attenuation, alleviating quality, also proposed not use the manufacture method (spy opens flat 8-278491 communique) of the optical element that constitutes by liquid crystal material of support substrate film.
According to this manufacture method, by will by the liquid crystal material that forms of orientation on the orientation substrate constitute layer by cementing agent be transferred to once peel off substrate again after, this releasable substrate is peeled off, can be produced the optical element that constitutes by liquid crystal material that does not use support substrate.In addition, the inventor etc. are desired physical strength, good fissility when satisfy making, easily optical defect is checked simultaneously, also to the mylar that uses uniaxial extension as the manufacture method application of releasable substrate patent (the special 2001-313506 of hope).
But, even under the situation of using the uniaxial extension film, in the applying angle of optical elements such as itself and used for liquid crystal display element compensating plate or when observing aspect the axle configuration of used Polarizer, there is the restriction of possible condition in the inspection of optical defect, during in addition from oblique observation, because residual birefringent influence, existence can not be seen the problem of defective etc.On the other hand, particularly relatively the defect inspection benchmark of the optical element of active type used for liquid crystal display element view angle compensation plate etc. becomes very strict, even under the situation of using the uniaxial extension polyester, also is difficult to see tens microns microscopic defect.
Check performance for improving, wish to use the as far as possible little optics homeotropic orientation film of birefringence, but present situation is the liquid crystal material layer that almost do not have to satisfy a no support substrate make in the optics homeotropic orientation film of necessary fissility, intensity, thickness etc., particularly, therefore be very difficult to realize required appropriate fissility owing to be difficult to fissility is controlled.
Summary of the invention
The objective of the invention is to address the above problem; in the manufacture method of the filming liquid crystal film of no support substrate film, to carry out the detection of optical defect easily; and make that the fissility when peeling off is good; by the releasable substrate is fully studied; found that tri acetyl cellulose film, can satisfy desired physical strength when making, good fissility by using saponification to handle; can check optical defect easily simultaneously, finish the present invention thus.
Promptly; the present invention's the 1st technical scheme relates to a kind of manufacture method of liquid crystal film; after it is characterized by releasable substrate that liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed forms by cementing agent and the tri acetyl cellulose film of being handled by saponification and boning; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate, after this peels off the releasable substrate.
In addition; the 2nd technical scheme of the present invention relates to a kind of manufacture method of elliptical polarization plate; after it is characterized by releasable substrate that liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed forms by cementing agent and the tri acetyl cellulose film of being handled by saponification and boning; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate; after this peel off the releasable substrate, attach Polarizer then.
In addition; the 3rd technical scheme of the present invention relates to a kind of manufacture method of liquid crystal film; it is characterized by liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate, after this peels off the second releasable substrate.
In addition; the 4th technical scheme of the present invention relates to a kind of manufacture method of elliptical polarization plate; it is characterized by liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate; after this peel off the second releasable substrate, the Polarizer of fitting then.
Embodiment
The fixing liquid crystal material layer of the liquid crystal aligning of the Shi Yonging mode that to be a kind of employing fix the liquid crystal material that has state of orientation and the layer that is immobilized in the present invention, as immobilized mode, under the situation that is the high molecule liquid crystal material, can exemplify out from state of orientation and cool off rapidly, form vitreousness and the method that is fixed, and make behind the low molecule or high molecule liquid crystal material orientation with reactive functional group, make described functional group's reaction (solidify, crosslinked etc.) and the method for fixing etc.
As above-mentioned reactive functional group; can enumerate vinyl, (methyl) acryloyl group, vinyl oxygen base, epoxy radicals, oxetanyl, carboxyl, hydroxyl, amino, isocyanate group, acid anhydrides etc., the method that can be suitable for these each groups is reacted.
The liquid crystal material that can in the liquid crystal material layer, use, according to the final purpose or the manufacture method of liquid crystal film, can from no matter being to select in the low molecular weight liquid crystal material or the relative broad range of high molecule liquid crystal material, but preferred high molecule liquid crystal material.In addition, the molecular shape of liquid crystal material can be for bar-shaped, also can be for discoid.For example also can use the disc liquid-crystal compounds that shows plate-like (デ イ ス コ テ イ Star Network) nematic liquid crystal.
As the liquid crystal phase of the liquid crystal material layer before the immobilization, can enumerate nematic phase, twisted nematic phase, cholesterol phase, hybridization nematic phase, hybridization twisted nematic phase, plate-like nematic phase, butterfly-like structure liquid crystal and equate.
As above-mentioned high molecule liquid crystal material, can use the potpourri of various backbone chain type high molecule liquid crystal materials, side chain type high molecule liquid crystal material or these materials.As backbone chain type high molecule liquid crystal material, can enumerate the high molecule liquid crystal material of polyesters, polyamide-based, polycarbonate-based, polyimide, polyurethanes, polybenzimidazoles class, poly-benzoxazoles, polybenzothiozole class, poly-azomethine (azomethine) class, polyesteramide class, polyestercarbonate class, polyester-imide class etc., perhaps the compound of these materials etc.In addition, as side chain type high molecule liquid crystal material, can enumerate on the material with straight chain shape or ring texture skeletal chain of polyacrylate, polymethacrylate, polyethylene kind, polysiloxane-based, polyethers, polymalic acid ester class, polyesters etc. in conjunction with the high molecule liquid crystal material as the メ ソ ゲ Application base of side chain, the perhaps potpourri of these materials.Wherein from easy degree synthetic and orientation, the polyesters of preferred backbone chain type high molecule liquid crystal material.
As the low molecular weight liquid crystal material, can enumerate ends such as saturated benzene carboxylic acid, unsaturated benzene carboxylic acid, biphenyl carboxylic acids, aromatic series oxo carboxylic acid class, schiff's base type class, two azomethine classes, azo-compound class, azoxy compound class, cyclohexane ester compounds class, sterol compound class and go up the compound that imports reactive functional group and show liquid crystal liquid crystal property, perhaps in above-mentioned compounds, add the composition of cross-linked compound formation etc. in the compound of demonstration liquid crystal liquid crystal property.In addition, as disc liquid-crystal compounds, can enumerate benzophenanthrene class, tribenzyl-benzene class etc.
In addition, also can cooperate all cpds in the scope that does not hinder liquid crystal liquid crystal property to show in liquid crystal material, these compounds have functional group or the position that can react by heat or photo-crosslinking etc.As the group that can carry out cross-linking reaction, can enumerate above-mentioned various reactive functional group etc.
The liquid crystal material layer that liquid crystal aligning is fixed can form in the following manner: the composition of all cpds that comprises described liquid crystal material or add as required is coated on method on the orientation substrate with molten condition; Perhaps the formation such as method of said composition solution coat on orientation substrate is filmed, this is coated on filming through super-dry, thermal treatment (liquid crystal aligning) on the orientation substrate, carry out the means that above-mentioned orientation is fixed of rayed and/or heat treated (polymerization, crosslinked) etc. as required, so that the fixing mode of orientation forms.
For the solvent that uses in the above-mentioned solution preparation, as long as the liquid crystal material or the composition that use among the present invention of this solvent solubilized, and can heat up in a steamer under proper condition, just it not had special restriction, the ketone of general preferred use acetone, methyl ethyl ketone, different Fu Er ketone etc.; The ether ketone of butoxyethyl group alcohol, hexyl oxygen base ethyl alcohol, methoxyl-2-propane etc.; The glycol ethers of glycol dimethyl ether, diethylene glycol dimethyl ether etc.; The ester class of ethyl acetate, acetic acid methoxyl propyl ester, ethyl lactate etc.; The phenols of phenol, chlorophenol etc.; N, the amide-type of dinethylformamide, N,N-dimethylacetamide, N-Methyl pyrrolidone etc.; The halogen hydro carbons of chloroform, tetrachloroethane, dichlorobenzene etc. etc., the perhaps mixed system of these solvents.In addition, film, also can in solution, add surfactant, defoamer, levelling agent etc. in order on orientation substrate, to form homogeneous.In addition, for painted purpose, in the scope that does not hinder liquid crystal liquid crystal property to show, also can add bitintability dyestuff or common dyestuff, pigment etc.
For coating process, can adopt known method, as long as can guaranteeing the homogeneity of filming, this method then it is not had special restriction.For example can enumerate rolling method, mould is coated with method, dip coating, curtain and is coated with method and spin-coating method etc.After coating, also can add the operation of removing desolvate (drying) by the heating or the method for blowing warm wind etc.The thickness of coated film under drying regime be 0.1 μ m to 50 μ m, be preferably 0.2 μ m to 20 μ m.Beyond this scope, the optical property deficiency of gained liquid crystal material layer, the perhaps orientation of the liquid crystal material deficiency etc. that becomes, thus not preferred.
In addition, if desired by heat-treating etc., form liquid crystal aligning after, the immobilization that is orientated.Thermal treatment is by heating in liquid crystal phase displays temperature scope, and the auto-orientation that is had by liquid crystal material self can make the step of liquid crystal aligning.As heat treated condition, according to the liquid crystal phase operating temperature (transition temperature) of used liquid crystal material, its top condition is different with boundary value, therefore cannot treat different things as the same, but usually 10-300 ℃, preferably in 30-250 ℃ of scope.Cross low temperature and may make the orientation of liquid crystal fully not carry out, and at high temperature, liquid crystal material may decompose or orientation substrate is caused adverse effect.In addition,, be generally 3 seconds-60 minutes, preferably in 10 seconds-30 minutes scope for heat treatment time.The heat treatment time shorter than 3 second time may make liquid crystal aligning fully not finish, and will make the productivity extreme difference and surpass 60 minutes heat treatment time, and be therefore all not preferred in both cases.Liquid crystal material uses the mode that is suitable for used liquid crystal material to fix keeping the liquid crystal material layer on the orientation substrate under this state after finishing liquid crystal aligning by thermal treatment etc.
As orientation substrate, can exemplify out the film of polyimide, polyamide, polyamidoimide, polyhenylene sulfuration thing, polyhenylene oxidation thing, polyetherketone, polyetheretherketone, polyethersulfone, polysulfones, polyethylene terephthalate, poly-naphthoic acid glycol ester, polyacrylate, tri acetyl cellulose, epoxy resin, phenolic resin etc.
These films change according to manufacture method, even be not used for the processing of display orientation energy in addition, also demonstrate enough orientation energy for the liquid crystal material that uses among the present invention, but can be not enough in orientation, perhaps not display orientation can etc. situation under, also can under appropriate heating, extend these films, film surface is upwards carried out wiping with Artificial Fibers cloth etc. at folk prescription, it also is friction treatment, on film, be provided with by polyimide, polyvinyl alcohol (PVA), the alignment films that known alignment agent such as siloxane coupling agent forms is also carried out friction treatment, monox icocline side vapor deposition treatment or with the combination etc. that suits of these methods, but use display orientation can film.
And, can use the sheet metal of the aluminium that is provided with a large amount of regular minute grooves from the teeth outwards, iron, copper etc. or various glass plates etc. as orientation substrate.
After the liquid crystal material layer that on orientation substrate, forms by cementing agent and releasable substrate bonding.
As this cementing agent, as long as relative liquid crystal material layer and releasable substrate have enough cohesive forces, and peelable releasable substrate in operation after this, do not damage the words of the optical characteristics of liquid crystal material layer, it is not particularly limited, for example can enumerates the various reactive materials such as potpourri, thermohardening type and/or light-cured type, electronics line curing type of crylic acid resin, methacrylic resin class, epoxy resin, ethylene-vinyl acetate copolymer class, rubber-like, carbamates, glymes and these materials.These cementing agents also have the function of the protective clear layer of protection liquid crystal material layer concurrently.In addition, also can use tackifier as above-mentioned cementing agent.
The reaction of above-mentioned reactive materials (curing) condition changes according to the condition of composition, viscosity and the temperature of reaction etc. that constitute cementing agent, therefore can select the condition corresponding with various situations.For example be under the situation of light-cured type, can preferably add various known light triggers, shine the light that sends from the light source of metal halide lamp, high-pressure mercury-vapor lamp, Cooper-Hewitt lamp, xenon lamp, arc lamp, laser, synchrotron radiation light source etc., react.Exposure as every current potential area (1 square centimeter) as integrated exposure, is generally 1-2000mJ, preferably in the scope of 10-1000mJ.But, under the significantly different situation of the spectrum of the absorption region of light trigger and light source, perhaps reactive compounds self to optical source wavelength have absorption can situation inferior, then not limited.In these cases, also can adopt the method for using suitable light sensitizer or the light trigger more than 2 kinds that absorbing wavelength is different to mix to use etc., react thus.Under the situation that is electronics line curing type, accelerating potential is generally 10kV-200kV, is preferably 50kV-100kV.
The thickness of cementing agent is different according to the intensity of the composition that constitutes aforesaid cementing agent, cementing agent and serviceability temperature etc., be generally 1-50 μ m, be preferably 3-30 μ m, in the time of beyond this scope, cohesive strength is not enough or have the situation of oozing out from the end, thereby not preferred.
In addition, in the scope of not damaging these cementing agent characteristics, be control optical characteristics and control basal plate fissility or aggressivity, also can be to wherein adding various particulates etc. or surface modifier.
As above-mentioned particulate, can enumerate the particulate different with the compound refractive index that constitutes cementing agent, do not damage the transparency and be used to improve anti-charging property electrically conductive microparticle, improve particulate that mar proof uses etc., more specifically can enumerate fine silicon dioxide, fine aluminium oxide, ITO (tin indium oxide) particulate, silver-colored particulate, various synthetic resin particulates etc.
In addition, as above-mentioned surface modifier, curable that as long as it is good with the intermiscibility of cementing agent, do not influence cementing agent and the optical property after the curing, then it is not had special restriction, can use the organic metal class surfactant, reactive surfactant of ionic, the water soluble surfactant active of nonionic, oil soluble surfactant, high molecular surfactant, the plain class surfactant of fluorine, siloxane etc. etc.The organic metal class surfactant of plain class surfactant such as the fluorine of perfluoroalkyl compound, perfluoro polyether compound etc. or siloxane etc. particularly, its surface modification effect is bigger, and is therefore preferred especially.The addition of surface modifier with respect to cementing agent preferably in the scope of 0.01-10 quality %, more preferably in the scope of 0.05-5 quality %, 0.1-3 weight % more preferably.When addition was more much smaller than this scope, the additive effect deficiency on the other hand, when addition is too much, may produce the rough sledding that cohesive strength too reduces etc.In addition, surfactant can use separately, also can be as required with multiple class and usefulness.
In addition, in the scope of not damaging effect of the present invention, also can cooperate the various adjuvants of antioxidant, ultraviolet light absorber etc.
In the 1st technical scheme of the present invention and the 2nd technical scheme, tri acetyl cellulose (TAC) film that uses saponification to handle as the releasable substrate.In addition, in the 3rd technical scheme of the present invention and the 4th technical scheme, tri acetyl cellulose (TAC) film that uses saponification to handle as the second releasable substrate.
In the present invention 3rd technical scheme and 4th technical scheme of tri acetyl cellulose film of using saponification to handle,, can use following film as the first releasable substrate as the second releasable substrate.That is tygon; polypropylene; the olefine kind resin of 4-methylpentene-1 resin etc.; polyamide; polyimide; polyamidoimide; polyetherimide; polyetherketone; polyetheretherketone; polyethersulfone; polyketone sulfide; polysulfones; polystyrene; the polyhenylene thioether; polyhenylene oxidation thing; polyethylene terephthalate; polybutylene terephthalate; polyacrylate; polyacetal; the polyester of uniaxial extension; polycarbonate; polyvinyl alcohol (PVA); polymethylmethacrylate; polyacrylate; amorphous polyolefin; the plastic sheeting of tri acetyl cellulose or epoxy resin etc.
For making these plastic sheetings have appropriate releasable, can be coated with siloxane in advance in its surface, perhaps can form organic film or inorganic thin film.In addition,, also can apply chemical treatment, perhaps apply physical treatment as corona treatment to the plastic sheeting surface with same purpose.
In addition, for adjusting the fissility of releasable substrate, also can make it contain lubricant or surface modifier.As above-mentioned lubricant, as long as in optical defect not being checked the scope that performance and fissility have a negative impact, its kind, addition are not particularly limited.As the instantiation of lubricant, can enumerate fine silicon dioxide, fine aluminium oxide etc.As the index of addition, can make the turbidity value of releasable substrate usually below 50%, preferably below 30%.When addition is very few, can not confirm to have additive effect, on the other hand, under the too much situation of addition, optical defect is checked degradation, and is therefore not preferred.
In addition, as above-mentioned surface modifier, curable that as long as it is good with the intermiscibility of cementing agent, do not influence cementing agent and the optical property after the curing, then it is not had special restriction, can use the organic metal class surfactant, reactive surfactant of ionic, the water soluble surfactant active of nonionic, oil soluble surfactant, high molecular surfactant, the plain class surfactant of fluorine, siloxane etc. etc.The organic metal class surfactant of plain class surfactant such as the fluorine of perfluoroalkyl compound, perfluoro polyether compound etc. or siloxane etc. particularly, its surface modification effect is bigger, and is therefore preferred especially.The relative cementing agent of the addition of surface modifier preferably in the scope of 0.01-10 quality %, more preferably in the scope of 0.05-5 quality %, 0.1-3 weight % more preferably.When addition was more much smaller than this scope, the additive effect deficiency on the other hand, when addition is too much, may produce the rough sledding that cohesive strength too reduces etc.In addition, surfactant can use separately, also can be as required with multiple class and usefulness.
In addition, also can make it contain other known various adjuvants, for example anticaking agent, antioxidant, anti-live agent, thermal stabilizer, impact modifiers etc. as required.
Peeling force about the releasable substrate, even the releasable substrate that produces for same material, change according to manufacture method, surface state and with these peeling forces such as wetting state of used cementing agent, therefore can not determine entirely, but be generally 0.38-12N/m with the contacted peeling force (peel off, measure under the peeling rate 30cm/ branch, room temperature for 180 °) at the interface of cementing agent, be preferably 0.38-8.0N/m.Be lower than when peeling force under the situation of this value range, after with liquid crystal material layer and releasable substrate bonding on the orientation substrate, when peeling off orientation substrate, peeling force is low excessively, can find that it floats on the releasable substrate, perhaps can not obtain the good state of peeling off at the interface desirable, it is not enough that the transfer printing from the liquid crystal material layer to the releasable substrate becomes.In addition, under the too high situation of peeling force, when peeling off the releasable substrate, the liquid crystal material layer is destroyed or with can not peeling off at the interface of required layer etc., thereby not preferred.
In addition, the thickness of releasable substrate also exerts an influence to fissility sometimes, is preferably 16-100 μ m, is preferably 25-50 μ m especially.When thickness was too thick, possible pick-up point instability made the fissility variation, on the other hand, when thickness is too thin, owing to can not guarantee the physical strength of film, therefore the problem of drawing crack etc. may take place in the mill.
Below tri acetyl cellulose film that the saponification of using among the present invention was handled be described.As the alkali that adds in the aqueous solution of using in the saponification processing, can enumerate NaOH, potassium hydroxide, lithium hydroxide, calcium hydroxide etc.According to alkali concn, dipping temperature and the dip time of these aqueous alkalis, the degree that the may command saponification is handled.As effectively carrying out the condition that saponification is handled, be about 5-30 weight % as alkali concn usually, be 30-70 ℃, be about 30 seconds-10 minutes as dipping temperature as dip time, handle under these conditions.In aqueous alkali, behind the dipping, wash, dried.In addition, also can be before washing, the hydrochloric acid about use 1N etc. carries out neutralisation treatment.
The degree that saponification is handled for example can be by estimating with the contact angle of water relatively, preferred process to contact angle below 40 degree, below preferably spending to 30.Under the situation of saponification undertreatment, the cohesive force of triacetylcellulose film and cementing agent is strong excessively, may be difficult to triacetylcellulose film is peeled off in manufacturing process.In addition, contact angle described herein is represented static contact angle, this measurement of contact angle method is to adopt contact angle meter (consonance interface science Co., Ltd. makes, contacts automatically meter CA-Z type), making volume under 20 ℃, the condition of 65%RH on needle point is the water droplet of 4 μ l, it is contacted with film, on film surface, make drop, measure the drop that produces this moment and the angle between the surface interface, with this angle as static contact angle.
In addition, even under the situation of the triacetylcellulose film of handling for saponification, film thickness exerts an influence to fissility sometimes, and is the same with above-mentioned releasable substrate, preferably its thickness is 16-100 μ m, is preferably 25-50 μ m especially.When thickness was too thick, possible pick-up point instability made the fissility variation, on the other hand, when thickness is too thin, owing to can not guarantee the physical strength of film, therefore the problem of drawing crack etc. may take place in the mill.
As one of liquid crystal film method for making of the present invention; it is characterized by after the releasable substrate that the liquid crystal material layer that on the orientation substrate liquid crystal aligning is fixed forms by cementing agent and the tri acetyl cellulose film of being handled by saponification bonds; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate, after this peels off the releasable substrate.
Method for making as liquid crystal film is not particularly limited it, as an example, can following method make.
At first, on orientation substrate, form filming of liquid crystal material, remove as required and desolvate etc., wait by heating and finish liquid crystal aligning, make the orientation of liquid crystal material layer fix according to the mode that is suitable for used liquid crystal material with suitable method.After this; on the liquid crystal material layer that orientation is fixed, form adhesive layer, after the releasable substrate tight bond that liquid crystal material layer and the tri acetyl cellulose film handled by saponification is formed by adhesive layer, make adhesive layer react (curing) as required after; peel off orientation substrate
Thus, the liquid crystal material layer that orientation can have been fixed is transferred on the releasable substrate that the tri acetyl cellulose film handled by saponification forms.In the present invention, obtained like this behind the sandwich that the liquid crystal material layer that bonds by cementing agent on the releasable substrate forms, to peel off this releasable substrate, obtained liquid crystal film.So just produced liquid crystal film.
For the liquid crystal film of gained, the surface for protection liquid crystal material layer can be provided with transparent protective film, perhaps the coating surface diaphragm on the liquid crystal material layer that exposes.As protective clear layer, also can from above-mentioned cementing agent, select.
Other method as liquid crystal film method for making of the present invention; it is characterized by liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate (the TAC film that saponification was handled), after this peels off the second releasable substrate.Can from above-mentioned releasable substrate, select arbitrarily as the first fissility substrate at this.
In production process of the present invention,, can keep easily detecting its optical defect under original state for the liquid crystal material layer that forms on the tri acetyl cellulose film film of handling in saponification.In addition, when peeling off, can not take place owing to peel off the damage of the not good liquid crystal material layer that causes or, can obtain well to peel off state in other situations about not peeling off at the interface.
Detection method as optical defect; it is not particularly limited; but can enumerate the absorption axes of 2 Polarizers of configuration on orthogonal directions; dispose the laminate film that tri acetyl cellulose film that saponification handled and liquid crystal material layer form betwixt; irradiated white light at Polarizer; carry out the method for visual observations from the direction of opposing, perhaps adopt the robotization method of line style camera etc.According to the retardation (product of birefringence and liquid crystal material layer thickness) of described liquid crystal material layer, the absorption axes of Polarizer need not certain orthogonal configuration, also can be set at the arbitrarily angled of easy detection optical defective.
For the liquid crystal film of gained, the surface for protection liquid crystal material layer can be provided with transparent protective film, perhaps the coating surface diaphragm on the liquid crystal material layer that exposes.As protective clear layer, also can from above-mentioned cementing agent, select.
In the present invention; also can make a kind of elliptical polarization plate by the following method; after wherein the releasable substrate that forms by cementing agent and the tri acetyl cellulose film handled by saponification of the liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed bonds; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate; after this peel off the releasable substrate, attach Polarizer then.
In addition; also can make elliptical polarization plate by the following method in the present invention; wherein the liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate; after this peel off the second releasable substrate, the Polarizer of fitting then.
The face that liquid crystal film is attached Polarizer does not have special restriction, can be in orientation substrate release surface side, and also can be in the release surface side of the first releasable substrate.The attaching face of Polarizer can suit to select according to purposes, method for making etc.
Elliptical polarization plate of the present invention also can contain 1 layer or multilayer anti-reflection layer, non-glare treated layer, hard conating, light diffusion layer except Polarizer and liquid crystal film.The cementing agents of fitting with Polarizer or using when bonding etc. then do not have special restriction to it as long as be the optics rank, for example can use the suitable substance in the above-mentioned cementing agent.
The Polarizer that uses in elliptical polarization plate of the present invention as long as it can reach purpose of the present invention, does not have special restriction to it, can suit to use normally used Polarizer in the liquid crystal indicator, but the preferred film-type Polarizer that uses exploitation listing in recent years.Can use PVA class light polarizing film particularly as the PVA of polyvinyl alcohol (PVA) (PVA) or part acetalation, absorption iodine and/or double-colored type pigment and the light polarizing film that extends to form, the light polarizing film that forms by the polyene alignment films of the desalination acid treatment thing of the processed thing of similar PVA or polyvinyl chloride etc. etc. on the hydrophilic macromolecule film that forms by the partly-hydrolysed thing of ethylene-vinyl acetate copolymer etc.Also can use reflection type polarizing film in addition.
In above-mentioned Polarizer, light polarizing film can be used separately, be to improve intensity, improves hydroscopicity, improves thermotolerance etc., also can on the single surface of light polarizing film or two surfaces protective clear layer etc. be set.As protective clear layer, can enumerate light-cured type resin beds such as layer, resin coated layer, propylene class or epoxies directly stacked or that form by transparent plastic films such as stacked polyester of cementing agent or tri acetyl celluloses etc.When these protective clear layers cover on two surfaces of light polarizing film, can on two surfaces, protective clear layer be set simultaneously, different protective clear layers perhaps is set.
In addition; in above-mentioned manufacturing process; before peeling off the tri acetyl cellulose film that saponification handled; perhaps after peeling off; by or bonding film adhered with other optics anisotropy; peel off the tri acetyl cellulose film that saponification was handled as required, can obtain to have the various optical elements of liquid crystal film.
Even in this optical element, before film adhered with the optics anisotropy, the liquid crystal material layer that forms on the tri acetyl cellulose film that saponification was handled can directly easily detect optical defect with stacked state.
In addition, also can the above-mentioned various films of stacked as required multilayer or layer, will be with simultaneously, for example the liquid crystal material layer is adhered to one another as required, perhaps fits by cementing agent.
In having the various optical elements of liquid crystal film of the present invention, for example the liquid crystal film that is fixed to row orientations, twisted nematic orientation has the function of phasic difference film, can be used as that STN type, TN type, OCB type, HAN type etc. see through or the compensating plate of reflection-type liquid-crystal display device uses.The liquid crystal film that cholesterol orientation or smectic liquid crystal orientation are fixed can utilize in improving polarisation reflectance coating, reflection-type chromatic filter, various Security element or the decorating film etc. that briliancy uses, wherein Security element or decorating film utilized because select reflected energy, the phenomenon formation that changes according to visual angle, reflected light color.In addition, reverse and mix the film that orientation has been fixed, by utilizing its retardance phenomenon when the front is seen, can be used as phasic difference film or wavelength plate utilizes, in addition by utilizing the asymmetry that produces towards (inclination angle of the molecular axis of film thickness direction), can improve at the angle of visibility of TN type liquid crystal indicator in the film etc. and utilize by hysteresis value.In addition, by the liquid crystal film and the Polarizer combination that will have 1/4 function of wavelength, can be used as the uses such as anti-reflection filter of rotatory polarization plate, reflection-type liquid-crystal display device or EL display device.
Utilizability on the industry
The present invention uses as the releasable substrate by the tri acetyl cellulose film that saponification was handled; can extremely easily reach extremely unapproachable purpose under the situation of using common releasable substrate; make the optical defect such as foreign matter, briliancy, irregular colour of liquid crystal material layer detect easily, and the releasable substrate have good fissility.
Followingly the present invention is specified, but the present invention is not subjected to the restriction of these embodiment according to embodiment.
(formulation example)
Use 50mmol terephthalic acid (TPA), 50mmol 2,6-naphthalene dicarboxylic acids, 40mmol methylnaphthohydroquinone diacetate, 60mmol catechol diacetate and 60mg N-methylimidazole are under nitrogen atmosphere, 270 ℃ of following polycondensations 12 hours.After this, after being dissolved in the gained reaction product in the tetrachloroethane, in methyl alcohol, precipitate once more, make with extra care, obtain liquid crystalline polyester 14.6g.The logarithm viscosity of this liquid crystalline polyester (polymkeric substance-1) (phenol/tetrachloroethane (6/4 mass ratio) mixed solvent: 30 ℃) is 1.16dl/g, has nematic phase as liquid crystal phase, more than 250 ℃, the glass transition temperature of being measured by differential scanning calorimetry (DSC) is 112 ℃ etc. square phase-liquid crystal phase transition temperature.
At room temperature, make 90mmol diphenyl dicarbapentaborane chloride, 10mmol terephthalylidene chloride and 105mmol S-2-methyl isophthalic acid in methylene chloride, the reaction of 4-butylene glycol is fed into reactant liquor in the methyl alcohol, precipitate again, obtain the 12.3g liquid crystalline polyester.The logarithm viscosity of this liquid crystalline polyester (polymkeric substance-2) is 0.11dl/g.
19.82g polymkeric substance-1 and 0.18g polymkeric substance-2 are dissolved in the 80g N-N-methyl-2-2-pyrrolidone N-, solution is adjusted.On the Kapton that uses rayon cloth to carry out friction treatment to cross (trade name " カ プ ト Application ", E.I.Du Pont Company make), use spin coater to be coated with this solution, drying is carried out 20 minutes thermal treatment after removing and desolvating under 210 ℃, form twisting to the row orientation texture.After the thermal treatment, be cooled to room temperature, make twisting fix to the row orientation texture, obtaining actual thickness on Kapton is the liquid crystal material layer (liquid crystal material layer 1) of the homogeneous orientation of 3.0 μ m.Actual thickness adopts the contact pin type film thickness gauge to measure.
(embodiment 1)
The commercially available UV curing type cementing agent that (with the face of Kapton opposition side) coating 5 μ m are thick on the liquid crystal material layer 1 by the formulation example gained (UV-3400, Toagosei Co., Ltd make) (adhesive layer 1); laminate thickness is the tri acetyl cellulose film (hereinafter referred to as the TAC film of saponification) that the saponification of 40 μ m was handled thereon; as the releasable substrate; by the UV irradiation of about 600mJ, make this adhesive layer 1 solidify.At this, as tri acetyl cellulose film (TAC film), use commercially available film (trade name " Off ジ Star Network ", Fuji Photo Film Co., Ltd. make), the water contact angle after the saponification is 20 degree.After this, by peeling off Kapton, liquid crystal material layer 1 is transferred on the saponification TAC film as the releasable substrate, obtains liquid crystal film duplexer 1 from the duplexer of saponification TAC film/adhesive layer 1/ liquid crystal material layer 1/ Kapton.
Be the optical defect in the research liquid crystal film duplexer 1, the absorption axes of 2 Polarizers is configured on the orthogonal directions, be provided with betwixt and be of a size of 14 inches liquid crystal film duplexer 1, to be positioned at Polarizer bottom white fluorescent lamp as light source, the other way around the defective of the foreign matter in the visual observations liquid crystal film duplexer 1, scratch etc.
The result can not be subjected to the influence of releasable substrate, can easily check defective.Required time was 11 seconds when at this moment, liquid crystal film duplexer 1 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the face of the liquid crystal material layer 1 that gained liquid crystal film duplexer 1 exposes.After this, peel off saponification TAC film from the duplexer of saponification TAC film/adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 1/ barrier film, the peeling force between saponification TAC film and the adhesive layer 1 is 2.4N/m.
Further on the face of the adhesive layer 1 of the stacked body of adhesive layer 1/ liquid crystal material layer 1/ adhesive layer, 1/ barrier film of gained by thick adhesive layer 2 layered polarization plates (the about 180 μ m of thickness of 25 μ m; Sumitomo Chemical Company Ltd makes " SQ-1852AP "), obtain elliptical polarization plate, it is formed by the integrally formed duplexer of Polarizer/adhesive layer 2/ adhesive layer, 1/ liquid crystal material layer 1/ adhesive layer, 1/ barrier film.
In manufacturing process, the optical defect of liquid crystal film duplexer 1 is checked functional, and in addition, the fissility of saponification TAC film is extremely good, can normally peeling off at the interface of the TAC of saponification film and adhesive layer 1.
(comparative example 1)
Except in embodiment 1, using unsaponified TAC film (trade name " Off ジ Star Network ", Fuji Photo Film Co., Ltd. make) the sapond TAC film of replacement, implement according to the mode the same with embodiment 1, peel off Kapton by the duplexer of saponification TAC film/adhesive layer 1/ liquid crystal material layer 1/ Kapton never, liquid crystal material layer 1 is transferred to not on the saponification TAC film, obtains liquid crystal film duplexer 2.
By adopting the method the same with embodiment 1, the optical defect of liquid crystal film duplexer 2 is observed, the result can not be subjected to the influence of releasable substrate, can easily check defective.Required time was 10 seconds when at this moment, liquid crystal film duplexer 2 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the face of the liquid crystal material layer 1 that gained liquid crystal film duplexer 2 exposes.After this, never the duplexer of saponification TAC film/adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 1/ barrier film is peeled off not saponification TAC film, but, on normal interface, can not peel off fully owing to the cohesive force between saponification TAC film and the adhesive layer 1 is not strong excessively.
In manufacturing process, the inspectability of liquid crystal film duplexer 2 is good, but when peeling off not saponification TAC film, the non-constant of fissility peeling off at the interface of unsaponified TAC film and adhesive layer 1, can not obtain normal released part.
(comparative example 2)
Except used thickness in embodiment 1 is the sapond TAC film of the polycarbonate of 50 μ m (Kanegafuchi Chemical Industry Co., Ltd's manufacturing) replacement, implement according to the mode the same with embodiment 1, by peeling off Kapton from the duplexer of polycarbonate film/adhesive layer 1/ liquid crystal material layer 1/ Kapton, liquid crystal material layer 1 is transferred on the polycarbonate film, obtains liquid crystal film duplexer 3.
By adopting the method the same with embodiment 1, the optical defect of liquid crystal film duplexer 3 is observed, the result can not be subjected to the influence of releasable substrate, can easily check defective.Required time was 12 seconds when at this moment, liquid crystal film duplexer 3 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the face of the liquid crystal material layer 1 that gained liquid crystal film duplexer 3 exposes.After this, peel off polycarbonate film from the duplexer of polycarbonate membrane/adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 1/ barrier film.Peeling force between polycarbonate film and the adhesive layer 1 is 26N/m, and is very serious, produces white opacity at the interface peeling off.
The inspectability of liquid crystal film duplexer 3 is good in manufacturing process, but when peeling off polycarbonate film, and the non-constant of fissility is whole about 10% at the area of the normal released part of peeling off gained at the interface of polycarbonate film and adhesive layer 1.
(comparative example 3)
Except used thickness in embodiment 1 is that the polyethylene terephthalate that extends of the twin shaft of 50 μ m (following polyethylene terephthalate is called PET) film (trade name " T60 ", Dongli Ltd. make) replaces the sapond TAC, implement according to the mode the same with embodiment 1, by peeling off Kapton from the duplexer of T60PET film/adhesive layer 1/ liquid crystal material layer 1/ Kapton, liquid crystal material layer 1 is transferred on the T60PET film, obtains liquid crystal film duplexer 4.
By adopting the method the same with embodiment 1, the optical defect of liquid crystal film duplexer 4 is observed, the result extremely is difficult to check defective owing to the influence that is subjected to the birefringence of T60PET film.Can not check.
Even the intersecting angle to the absorption axes of 2 Polarizers carries out various changes, even perhaps the angle of the absorption axes of the axis of orientation of liquid crystal material layer 1 and Polarizer is changed, can not remove the interference that causes by birefringence, be difficult to check.
(embodiment 2)
Except used thickness in embodiment 1 is the sapond TAC film of twin shaft extension PET film (trade name " #52 ", Teijin Ltd make) (hereinafter referred to as the #52PET film) replacement that is coated with siloxane of 38 μ m, implement according to the mode the same with embodiment 1, by peeling off Kapton, liquid crystal material layer 1 is transferred on the #52PET film from the duplexer of #52PET film/adhesive layer 1/ liquid crystal material layer 1/ Kapton.
Further coating thickness is the UV curable cementing agent (UV-3400) (adhesive layer 2) of 5 μ m on the face of the liquid crystal material layer 1 that gained liquid crystal film duplexer 1 exposes, lamination is the saponification TAC film (contact angle with water after trade name " Off ジ Star Network ", the saponification is 15 degree) of 40 μ m as second thickness of peeling off substrate thereon, UV irradiation by about 600mJ, this adhesive layer 2 is solidified, obtain the duplexer that forms by #52PET film/adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 2/ saponification TAC film.After this, peel off the #52PET film, obtain the liquid crystal film duplexer 5 that forms by adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 2/ saponification TAC film from this duplexer.
According to the method the same optical defect is observed, found that the influence that can not be subjected to the releasable substrate, can easily carry out defect inspection with embodiment 1.Required time was 9 seconds when at this moment, liquid crystal film duplexer 5 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the film of the adhesive layer 1 of gained liquid crystal film duplexer 5.After this, peel off saponification TAC film from the duplexer of saponification TAC film/adhesive layer 2/ liquid crystal material layer 1/ adhesive layer 1/ adhesive layer 1/ barrier film, the peeling force between saponification TAC film and the adhesive layer 2 is 2.5N/m.
Further on the face of the adhesive layer 2 of the stacked body of adhesive layer 2/ liquid crystal material layer, 1/ adhesive layer 1/ adhesive layer, 1/ barrier film of gained by thick adhesive layer 2 layered polarization plates (the about 180 μ m of thickness of 25 μ m; Sumitomo Chemical Company Ltd makes " SQ-1852AP "), obtain elliptical polarization plate, it is formed by the integrally formed duplexer of Polarizer/adhesive layer 2/ adhesive layer 2/ liquid crystal material layer, 1/ adhesive layer 1/ adhesive layer, 1/ barrier film.In manufacturing process, the optical defect of liquid crystal film duplexer 1 is checked functional, and in addition, the fissility of saponification TAC film is also extremely good, can normally peeling off at the interface of the TAC of saponification film and adhesive layer 2.
(comparative example 4)
Except in embodiment 2, using unsaponified TAC film (trade name " Off ジ Star Network ", thickness 40 μ m) to replace sapond TAC film as the second fissility substrate, implement according to the mode the same, obtain by the adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 2/ liquid crystal film duplexer 6 that forms of saponification TAC film not with embodiment 2.
By adopting the method the same with embodiment 1, optical defect is observed, the result can not be subjected to the influence of releasable substrate, can easily check defective.Required time was 11 seconds when at this moment, liquid crystal film duplexer 6 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the face of the adhesive layer 1 that gained liquid crystal film duplexer 6 exposes.After this, never the duplexer of saponification TAC film/adhesive layer 2/ liquid crystal material layer 1/ adhesive layer 1/ adhesive layer 1/ barrier film is peeled off not saponification TAC film, but because cohesive force is strong excessively, can not peel off fully.
In manufacturing process, the inspectability of liquid crystal film duplexer 6 is good, but when peeling off not saponification TAC film, the non-constant of fissility peeling off at the interface of unsaponified TAC film and adhesive layer 2, can not obtain normal released part.
(comparative example 5)
Except used thickness in embodiment 2 is that 50 microns acryl resin film (trade name " ア Network リ プ レ Application ", Mitsubishi Rayon Co., Ltd make) replaces sapond TAC film as the second fissility substrate, implement according to the mode the same, obtain the liquid crystal film duplexer 7 that forms by adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 2/ ア Network リ プ レ Application with embodiment 2.
By adopting the method the same with embodiment 1, optical defect is observed, found that the influence that can not be subjected to the releasable substrate, can easily check defective.Required time was 12 seconds when at this moment, liquid crystal film duplexer 7 was checked.
The subsidiary thick adhesive layer 1 of about 25 μ m that barrier film is arranged of lamination on the face of the adhesive layer 1 that gained liquid crystal film duplexer 7 exhumes out.After this, peel off ア Network リ プ レ Application, but, can not peel off fully because cohesive force is strong excessively from the duplexer of ア Network リ プ レ Application/adhesive layer 2/ liquid crystal material layer 1/ adhesive layer 1/ adhesive layer 1/ barrier film.
The inspectability of liquid crystal film duplexer 7 is good in manufacturing process, but when peeling off ア Network リ プ レ Application, and the non-constant of fissility can not obtain normal released part at the interface at ア Network リ プ レ Application and adhesive layer 2.
(comparative example 6)
Except used thickness in embodiment 2 is that the PET film (trade name " S10 ", Dongli Ltd. make) of 50 μ m replaces sapond TAC as the second releasable substrate, implement according to the mode the same, obtain the liquid crystal film duplexer 8 that forms by adhesive layer 1/ liquid crystal material layer 1/ adhesive layer 2/S10PET film with embodiment 2.
By adopting the method the same with embodiment 1, the optical defect of liquid crystal film duplexer 8 is observed, found that owing to the influence that is subjected to the birefringence of S10PET film, extremely be difficult to check defective.Can not check.
Even the intersecting angle to the absorption axes of 2 Polarizers carries out various changes, even perhaps the angle of the absorption axes of the axis of orientation of liquid crystal material layer 1 and Polarizer is changed, can not remove the interference that causes by birefringence, be difficult to check.
The result of embodiment 1,2 and comparative example 1～6 all is shown in table 1.
Table 1
| The first releasable substrate | The second releasable substrate | Inspectability | Fissility | |
| Embodiment 1 | Saponification TAC | - | ○ | ○ |
| Comparative example 1 | Saponification TAC not | - | ○ | × |
| Comparative example 2 | Polycarbonate | - | ○ | × |
| Comparative example 3 | “T60”PET | - | × | × |
| Embodiment 2 | The PET of silicone coated " #52 " | Saponification TAC | ○ | ○ |
| Comparative example 4 | The PET of silicone coated " #52 " | Saponification TAC not | ○ | × |
| Comparative example 5 | The PET of silicone coated " #52 " | Acryl resin " ア Network リ プ レ Application " | ○ | × |
| Comparative example 6 | The PET of silicone coated " #52 " | “S10”PET | × | × |
Claims (4)
1, the manufacture method of liquid crystal film; after it is characterized by releasable substrate that liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed forms by cementing agent and the tri acetyl cellulose film of being handled by saponification and boning; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate, after this peels off the releasable substrate.
2, the manufacture method of elliptical polarization plate; after it is characterized by releasable substrate that liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed forms by cementing agent and the tri acetyl cellulose film of being handled by saponification and boning; peel off orientation substrate; the liquid crystal material layer is transferred on the releasable substrate; after this peel off the releasable substrate, attach Polarizer then.
3, the manufacture method of liquid crystal film; it is characterized by liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate, after this peels off the second releasable substrate.
4; the manufacture method of elliptical polarization plate; it is characterized by liquid crystal material layer that the liquid crystal aligning on the orientation substrate is fixed by the cementing agent and the first releasable substrate bonding after; peel off orientation substrate; the liquid crystal material layer is transferred on the first releasable substrate; after this second releasable substrate that itself and the tri acetyl cellulose film handled by saponification is formed by cementing agent bonds; after this peel off the first releasable substrate; the liquid crystal material layer is transferred on the second releasable substrate; after this peel off the second releasable substrate, the Polarizer of fitting then.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP301458/2002 | 2002-10-16 | ||
| JP2002301458A JP2004138697A (en) | 2002-10-16 | 2002-10-16 | Method for manufacturing liquid crystal film and elliptically polarizing plate |
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| CN1705899A CN1705899A (en) | 2005-12-07 |
| CN1313849C true CN1313849C (en) | 2007-05-02 |
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| JP (1) | JP2004138697A (en) |
| KR (1) | KR20050084850A (en) |
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| JP2007114270A (en) * | 2005-10-18 | 2007-05-10 | Nippon Oil Corp | Manufacturing method of optical film |
| JP2008183812A (en) * | 2007-01-30 | 2008-08-14 | Nippon Oil Corp | Manufacturing process of liquid crystal film and lamination film for optical device |
| JP2015079230A (en) | 2013-09-10 | 2015-04-23 | 住友化学株式会社 | Manufacturing method for laminate |
| KR102508041B1 (en) * | 2014-08-29 | 2023-03-08 | 스미또모 가가꾸 가부시키가이샤 | Process for producing optical film |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0726223A (en) * | 1993-07-08 | 1995-01-27 | Dainippon Printing Co Ltd | Highly transparent and slightly sticky antistatic protective film |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JPH11183712A (en) * | 1997-12-22 | 1999-07-09 | Dainippon Printing Co Ltd | Light diffusive resin layer, light diffusive film, polarizing plate with light diffusive layer and liquid crystal display device using the polarizing plate |
| JP2000347027A (en) * | 1999-06-07 | 2000-12-15 | Nippon Mitsubishi Oil Corp | Transferring element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06308328A (en) * | 1993-04-22 | 1994-11-04 | Nippon Petrochem Co Ltd | Optical element |
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2003
- 2003-10-09 KR KR1020057006457A patent/KR20050084850A/en not_active Application Discontinuation
- 2003-10-09 CN CNB2003801015108A patent/CN1313849C/en not_active Expired - Fee Related
- 2003-10-09 WO PCT/JP2003/012961 patent/WO2004036274A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0726223A (en) * | 1993-07-08 | 1995-01-27 | Dainippon Printing Co Ltd | Highly transparent and slightly sticky antistatic protective film |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JPH11183712A (en) * | 1997-12-22 | 1999-07-09 | Dainippon Printing Co Ltd | Light diffusive resin layer, light diffusive film, polarizing plate with light diffusive layer and liquid crystal display device using the polarizing plate |
| JP2000347027A (en) * | 1999-06-07 | 2000-12-15 | Nippon Mitsubishi Oil Corp | Transferring element |
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| JP2004138697A (en) | 2004-05-13 |
| KR20050084850A (en) | 2005-08-29 |
| CN1705899A (en) | 2005-12-07 |
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