CN101713840A - Polarizing plate, liquid crystal panel and liquid crystal display - Google Patents
Polarizing plate, liquid crystal panel and liquid crystal display Download PDFInfo
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- CN101713840A CN101713840A CN200910174535A CN200910174535A CN101713840A CN 101713840 A CN101713840 A CN 101713840A CN 200910174535 A CN200910174535 A CN 200910174535A CN 200910174535 A CN200910174535 A CN 200910174535A CN 101713840 A CN101713840 A CN 101713840A
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- liquid crystal
- polaroid
- diffusion barrier
- film
- polarizing film
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
- B32B2329/04—Polyvinylalcohol
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a polarizing plate, a liquid crystal panel and a liquid crystal display device employing the polarizing plate. The polarizing plate is provided with a polarizing film formed by mono-axial stretched polyethenol series resin film containing orientated iodine or dichroic dyes, and diffusion films stacked on at least one surface of of the polarizing film by means of adhesive layers and having more than 1% of fog degree, wherein the adhesive layer is formed by condensate of solidified combination containing epoxide resin.
Description
Technical field
The liquid crystal panel and the liquid crystal indicator that the present invention relates to polaroid and used this polaroid, described polaroid have the diffusion barrier with light diffusing of the single or double of the light polarizing film of being laminated in.
Background technology
Liquid crystal indicator is as thin-type display devices such as LCD TV, LCD monitor, PC, and its purposes enlarges rapidly.Especially the market expansion of LCD TV is remarkable, and the requirement of cost degradation is also very high.
Common liquid crystal indicator is by the backlight that comprises cold-cathode tube or LED, light diffusing sheet, one or more light diffusing sheet, rear side polaroid, liquid crystal cells and look and recognize the side polaroid and constitute.About big picture LCD TV purposes, the demand of using as slim wall hung television highlights day by day, and is at this moment corresponding with the slimming of LCD TV, requires the thin-walled property of the member of use, the reduction of member number of packages.At such demand, known have by self giving light diffusing to the rear side polaroid that is configured between liquid crystal cells and the backlight, thereby omit one or more light diffusing sheets, cut down technology (for example, the Japanese kokai publication hei 11-183712 communique (patent documentation 1) of parts number of packages, TOHKEMY 2000-75133 communique (patent documentation 2), TOHKEMY 2000-75134 communique (patent documentation 3), TOHKEMY 2000-75135 communique (patent documentation 4), TOHKEMY 2000-75136 communique (patent documentation 5), TOHKEMY 2000-75137 communique (patent documentation 6)).
As the method for itself giving light diffusing to the rear side polaroid, known to open in above-mentioned patent documentation 1～6 grade, as the transparent protective film that is laminated in light polarizing film, use the method for the diffusion barrier of having given light diffusing.Water system tackifier (with reference to TOHKEMY 2005-70140 communique (patent documentation 7), TOHKEMY 2005-181817 communique (patent documentation 8), TOHKEMY 2005-208456 communique (patent documentation 9)) such as polyethenol series tackifier, polyurethane series tackifier had been used in the such light polarizing film and the applying of diffusion barrier in the past.
But, when for example being bonded on the light polarizing film of using the water system tackifier by low film formed diffusion barriers of moisture permeability such as polyethylene terephthalate film, polymethyl methacrylate film, since diffusion barrier comparatively hydrophobicity, because of moisture permeability is low can't abundant dry tackifier in contained reasons such as water, existence can't obtain sufficient bond strength, outward appearance be produced the problem of baneful influence.
Summary of the invention
The present invention finishes in order to address the above problem, its purpose is, even provide when using by the low film formed diffusion barrier of resin of moisture permeability, diffusion barrier and light polarizing film are also bonded with sufficiently high bond strength, and the polaroid that outward appearance is also good, the rear side polaroid that especially between liquid crystal cells and backlight, disposes.In addition, other purpose of the present invention is, the liquid crystal panel and the liquid crystal indicator that have used this polaroid are provided.
According to the present invention, a kind of polaroid is provided, it has: by be adsorbed with the film formed light polarizing film of uniaxial tension polyvinyl alcohol resin that iodine or dichroic dye and described iodine or dichroic dye be oriented and at least one face of this light polarizing film by adhesive layer and the stacked diffusion barrier of mist degree more than 1%, this adhesive layer is formed by the solidfied material of the solidification compound that contains epoxy resin.Contained epoxy resin is preferably the epoxy resin that does not have aromatic rings in the molecule in the solidification compound.The mist degree of diffusion barrier is preferably more than 5%.
Polaroid of the present invention, preferred stacked diffusion barrier on a face of light polarizing film, stacked optical compensation films or diaphragm on another face.
Polaroid of the present invention can be well uses as the rear side polaroid that disposes between liquid crystal cells that liquid crystal indicator had and backlight.
In addition, according to the present invention, a kind of liquid crystal panel is provided, has liquid crystal cells and the polaroid of stacked the invention described above on this liquid crystal cells, on a face of this light polarizing film of this polaroid, be laminated with diffusion barrier, on light polarizing film and the face face opposition side that is laminated with diffusion barrier, be laminated with liquid crystal cells.
And then, according to the present invention, a kind of liquid crystal indicator is provided, the liquid crystal panel that has backlight, light diffusing sheet and the invention described above successively, this liquid crystal panel is configured with the mode that light diffusing sheet is faced mutually with the diffusion barrier of polaroid, a kind of liquid crystal indicator also is provided, has the liquid crystal panel of backlight, light diffusing sheet, light diffusing sheet and the invention described above successively, this liquid crystal panel is configured with the mode that light diffusing sheet is faced mutually with the diffusion barrier of polaroid.
According to the present invention, can provide the good polaroid with light diffusing and the liquid crystal panel of bond strength height, outward appearance of diffusion barrier and light polarizing film.In addition, according to the present invention, can realize the reduction of the thin-walled property and the member number of packages of liquid crystal indicator.Liquid crystal indicator of the present invention like this can perform well in big picture liquid crystal display television by using liquid crystal indicator, especially can the liquid crystal display television by using liquid crystal indicator of wall hanging in.
Embodiment
＜polaroid 〉
(light polarizing film)
About the light polarizing film of using in the polaroid of the present invention, specifically, be on the polyvinyl alcohol resin film of uniaxial tension, to be adsorbed with the light polarizing film that dichromatism pigment and described dichromatism pigment are oriented.Constitute the polyvinyl alcohol resin of polyvinyl alcohol resin film, can use polyvinyl acetate is resin saponification and the resin that obtains.As polyvinyl acetate is resin, except polyvinyl acetate as leifa, can also enumerate vinyl acetate and can with the multipolymer of other monomers of its copolymerization, for example vinyl-vinyl acetate copolymer etc.As can with other monomers of vinyl acetate copolymerization, for example can enumerate unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class, have the acrylic amide of ammonium etc.
The saponification degree of polyvinyl alcohol resin is normally about 85～100 moles of %, preferred 98 moles more than the %.Polyvinyl alcohol resin can be modified, for example also can use through the aldehydes modification and polyvinyl formal, polyvinyl acetal and polyvinyl butyral etc.The degree of polymerization of polyvinyl alcohol resin normally about 1000～10000, preferred about 1500～5000.
The film that this polyvinyl alcohol resin system film is obtained can be used as the original membrane (former anti-Off イ Le system) of light polarizing film and uses.Method with polyvinyl alcohol resin system film is not particularly limited, can be with known proper method system film.Thickness to the original membrane made by polyvinyl alcohol resin is not particularly limited, but for example is about 10～150 μ m.
Light polarizing film is made via following operation usually, that is, will make its operation of adsorbing this dichromatism pigment (dyeing treatment process) with the dichromatism pigment dyeing, will be adsorbed with operation (boric acid treatment process) that the polyvinyl alcohol resin film of dichromatism pigment handles with boric acid aqueous solution and the operation (washing treatment process) of after handling, washing through boric acid aqueous solution by the original membrane that aforesaid polyvinyl alcohol resin is made.
In addition, when making light polarizing film, the polyvinyl alcohol resin film is stretched by single shaft usually, and this uniaxial tension can carry out before the dyeing treatment process, also can carry out in the dyeing treatment process, can also carry out after the dyeing treatment process.When uniaxial tension carried out after the dyeing treatment process, this uniaxial tension can carry out before the boric acid treatment process, also can carry out in the boric acid treatment process.In addition, also can carry out uniaxial tension in these a plurality of stages.Uniaxial tension can stretch along single shaft between the different roller of peripheral speed, can also use hot-rolling to stretch along single shaft.In addition, can be the dry type stretching that in atmosphere, stretches, can also be the wet type that stretches under the state of its swelling is stretched.Stretching ratio is normally about 3～8 times.
The dyeing that the polyvinyl alcohol resin film is carried out with the dichromatism pigment in the dyeing treatment process for example can be by carrying out the polyvinyl alcohol resin film immersion in the aqueous solution that contains the dichromatism pigment.As the dichromatism pigment, can use for example iodine, dichroic dye etc.Dichroic dye comprises and for example contains the directly dichromatism direct dyes of red 39 bis-azo compounds such as grade (disazo compound) of C.I.; The dichromatism direct dyes that contains trisazo-, four azo-compounds etc.In addition, the polyvinyl alcohol resin film was preferably implemented the dip treating in water in advance before dyeing is handled.
When using iodine, adopt the method that dipping polyvinyl alcohol resin film dyes in the aqueous solution that contains iodine and potassium iodide usually as the dichromatism pigment.Content of iodine in this aqueous solution is 0.01～1 weight portion with respect to water 100 weight portions usually, and the content of potassium iodide is 0.5～20 weight portion with respect to water 100 weight portions usually.When using iodine as the dichromatism pigment, normally 20～40 ℃ of the temperature of the aqueous solution of using during dyeing, in addition, the dip time in this aqueous solution (dyeing time) normally 20～1800 seconds.
On the other hand, when using dichroic dye, adopt the method that dipping polyvinyl alcohol resin film dyes in containing the aqueous solution of water-soluble dichroic dye usually as the dichromatism pigment.The content of the dichroic dye in this aqueous solution is 1 * 10 with respect to water 100 weight portions usually
-4～10 weight portions, preferred 1 * 10
-3～1 weight portion, preferred especially 1 * 10
-3～1 * 10
-2Weight portion.This aqueous solution can also contain inorganic salts such as sodium sulphate as dyeing assistant.When using dichroic dye as the dichromatism pigment, normally 20～80 ℃ of the temperature of the aqueous dye solutions that uses during dyeing, in addition, the dip time in this aqueous solution (dyeing time) normally 10～1800 seconds.
The boric acid treatment process will be by being carried out in the aqueous solution that contains boric acid by the polyvinyl alcohol resin film immersion of dichromatism pigment dyeing.The amount that contains the boric acid in the aqueous solution of boric acid is with respect to water 100 weight portions 2～15 weight portions normally, preferred 5～12 weight portions.When using iodine as the dichromatism pigment in the above-mentioned dyeing treatment process, the aqueous solution of using in this boric acid treatment process that contains boric acid preferably contains potassium iodide.At this moment, contain the amount of the potassium iodide in the aqueous solution of boric acid, be generally 0.1～15 weight portion with respect to water 100 weight portions, preferred 5～12 weight portions.Dip time in containing the aqueous solution of boric acid normally 60～1200 seconds, preferred 150～600 seconds, and then preferred 200～400 seconds.The temperature of aqueous solution that contains boric acid is normally more than 50 ℃, and preferred 50～85 ℃, more preferably 60～80 ℃.
In ensuing washing treatment process, above-mentioned polyvinyl alcohol resin film after boric acid is handled is washed processing by for example impregnated in the water.Normally 5～40 ℃ of the temperature of water when washing is handled, dip time is 1～120 second.Washing is handled the back and is implemented dried usually, obtains light polarizing film.Dried is for example preferably used air drier, far infra-red heater to wait to carry out.Normally 30～100 ℃ of the temperature of dried, preferred 50～80 ℃.Normally 60～600 seconds time of dried, preferred 120～600 seconds.
Like this, dyeing, boric acid processing and washing processing to the polyvinyl alcohol resin film is implemented uniaxial tension, utilized the dichromatism pigment to carry out obtain light polarizing film.The thickness of this light polarizing film is usually in the scope of 5～40 μ m.Polaroid of the present invention has the structure that is laminated with diffusion barrier at least one face of such light polarizing film by adhesive layer.
(diffusion barrier)
The diffusion barrier that uses in the polaroid of the present invention is the film that is used for polaroid is given light diffusion function.Base material to diffusion barrier is not particularly limited, and can use various materials.For example, can use synthetic high polymers such as tygon, polypropylene, Polyvinylchloride, polyethylene terephthalate, PEN, polycarbonate, norbornene resin, polyurethane, polyacrylate, polymethylmethacrylate; Transparent polymer materials such as natural polymer such as cellulose diacetate, cellulose triacetate.In addition, these macromolecular materials can contain adjuvants such as ultraviolet light absorber, antioxidant, plastifier as required.Wherein, when adopting method shown below to make diffusion barrier, preferably use for example high thermoplastic resins of hydrophobicity such as tygon, polypropylene, Polyvinylchloride, polyethylene terephthalate, PEN, polycarbonate, norbornene resin, polymethylmethacrylate.
As above-mentioned transparent polymer material is made the method for diffusion barrier as base material, for example can enumerate: make the method that contains diffusant in the base material film; The method that contains the layer of diffusant in the one-sided of base material film surface or bilateral increase; And make method of the one-sided of base material film surface or bilateral asperitiesization (giving concave-convex surface) etc.These methods can be distinguished separately and use, and perhaps the method more than 2 kinds are used in combination.
When employing made the method that contains diffusant in the base material film, mixing in advance diffusant was shaped to membranaceous getting final product with it by The tape casting or extrusion molding in becoming the transparent polymer material of base material.When employing contains the method for layer of diffusant in the one-sided of base material film surface or bilateral increase, can at first be shaped to membranaceous by The tape casting or extrusion molding transparent polymer material, then, the resin liquid that is dispersed with diffusant is coated on the base material film, make the dry or curing of this resin liquid, make diffusion barrier thus.Perhaps, can also make the transparent polymer material of base material film and the mixing in advance coetrusion that the transparent polymer material of diffusant is arranged, make the diffusion barrier that constitutes by the sandwich construction that on base material film, is laminated with the layer that contains diffusant thus by use.In addition, when adopting the method for the surperficial asperitiesization that makes base material film, at first, transparent polymer material is shaped to sheet by The tape casting or extrusion molding, then, make surperficial asperitiesization by mould extrusion, the sand-blast that adopts the embossing working roll, thereby can make diffusion barrier.
As above-mentioned diffusant, so long as colourless or white particle just is not particularly limited, organic filler, inorganic particulate all can use.As organic filler, for example can enumerate polyolefin-based resins by polystyrene, tygon, polypropylene and so on, the particle that macromolecular compounds such as acrylic resin form can be through crosslinked macromolecule.In addition, can also use and be selected from the multipolymer that the monomer copolymerization more than 2 kinds in ethene, propylene, styrene, methyl methacrylate, benzoguanamine, formaldehyde, melamine, the butadiene etc. forms.As inorganic particulate, can enumerate the particle that for example forms by silicon dioxide, silicone (silicone), titanium dioxide etc., can also be beaded glass.
As the resin liquid of using in the method that is coated in the resin liquid that will be dispersed with above-mentioned diffusant on the base material film, can use the resin liquid of resin liquid, thermohardening type or the light-cured type of solvent evaporates type or water volatile-type.As the resin liquid of solvent evaporates type or water volatile-type, can use macromolecule dissolutions such as polyacrylate, polymethacrylate, Polyvinylchloride, polyvinyl acetate, cellulose, synthetic rubber or be scattered in alcohols such as methyl alcohol, ethanol, propyl alcohol, isopropyl alcohol; Cellosolve such as methyl cellosolve, ethyl cellosolve class; Aromatic series such as toluene, dimethylbenzene series solvent; In organic solvent such as ethyl acetate, methylene chloride or the water and the resin liquid that obtains.When being coated in the resin liquid of these solvent evaporates types or water volatile-type on the base material film, can make organic solvent or water volatilization formation tunicle by drying.As the resin liquid of thermohardening type, can use liquid that mixing forms by the compound that contains epoxy radicals and the resin liquid that gets as the compound with epoxy radicals generation condensation of representative with amine etc.As the resin liquid of light-cured type, can use in having the compound of acrylate-based or methacrylate based, aryl etc., add known optical free radical polymerization initiator and resin liquid; The resin liquid of in compound, adding known cationic polymerization light trigger and getting with vinyl ether group, epoxy radicals.In these resin liquid, can add adjuvants such as ultraviolet light absorber, antioxidant as required.
The haze value of diffusion barrier is more than 1%, and is preferred more than 5%, more preferably 15%～90%, and then preferred 45%～90%.In addition, preferred its total light transmittance of diffusion barrier is high more good more.Specifically, total light transmittance of diffusion barrier is preferably more than 70%, so more preferably more than 80%, preferred more than 85% especially.
The thickness of diffusion barrier is not particularly limited, but from the slim light-weighted viewpoint of polaroid, is preferably about 20 μ m～200 μ m, and then more preferably 30 μ m～100 μ m.
On light polarizing film two-sided during stacked diffusion barrier, the tackifier of liquid crystal cells and polaroid or the layer of bonding agent are formed for fitting on can a diffusion barrier therein.On a face of light polarizing film during stacked diffusion barrier, the tackifier of liquid crystal cells and polaroid or the layer of bonding agent can be formed for fitting on light polarizing film and the face face opposition side that is fitted with above-mentioned diffusion barrier.In addition, can also be on a face of light polarizing film stacked above-mentioned diffusion barrier, hyaline membranes such as stacked diaphragm, optical compensation films on another face, and on this hyaline membrane, form the layer of tackifier or bonding agent.As hyaline membrane, can enumerate tri acetyl cellulose membrane cellulose-based resin moldings such as (TAC films), ethylene series resin molding, acrylic resin film, polyester based resin films such as polyethylene terephthalate etc.And then, can also fold optical functional film described later on above-mentioned hyaline membrane upper strata, on this optical functional film, form the layer of tackifier or bonding agent.
The so-called cellulose-based resin that constitutes above-mentioned cellulose-based resin molding is meant cellulosic partial esterification thing or complete carboxylate, can enumerate for example cellulosic acetic acid esters, propionic ester, butyric ester and their mixed ester etc.More particularly, can enumerate triacetyl cellulose, diacetyl cellulose, cellulose ethanoate propionic ester, cellulose acetate butyrate etc.With so cellulose-based resin system film and during film forming, be suitable for using known method such as solvent cast method, extrusion by melting.Cellulose-based resin molding can be obtained commercially available product, for example can enumerate " FUJITAC TD80 " (FujiPhoto-Film (strain) system), " FUJITAC TD80UF " (Fuji Photo-Film (strain) system), " FUJITAC TD80UZ " (Fuji Photo-Film (strain) system), " KC8UX2M " (KONICA MINOLTA OPTO (strain) system), " KC8UY " (KONICA MINOLTAOPTO (strain) system) etc.
In addition, as by the film formed optical compensation films of cellulose-based resin, can enumerate for example to make and contain compound in the above-mentioned cellulose-based resin molding and the film that gets with phase differential adjustment function; Be coated with compound and the film that gets at cellulose-based surface resin film with phase differential adjustment function; With cellulose-based resin molding carry out uniaxial tension or biaxial stretch-formed and film etc.As by the commercially available film formed optical compensation films of cellulose-based resin, for example can enumerate " WV film Wide View Film WV BZ 438 ", " WV film Wide View Film " WV EA of Fuji Photo-Film (strain) system ", " KC4FR-1 " of KONICA MINOLTA OPTO (strain) system, " KC4HR-1 " etc.
Thickness by film formed diaphragm of cellulose-based resin or optical compensation films is not particularly limited; preferably in the scope of 20～90 μ m; more preferably in the scope of 30～90 μ m; if it is thin; the difficult treatment of film then; if and thick, poor in processability then, and unfavorable to the slim lightweight of the polaroid that obtains.
, can enumerate by the film formed optical compensation films of ethylene series resin as above-mentioned for example through uniaxial tension or biaxial stretch-formed cyclic olefine resin molding.At large-scale liquid crystal display television by using liquid crystal panel, especially have when using polaroid of the present invention in the liquid crystal panel of liquid crystal cells of vertical orientated (VA) pattern, as above-mentioned optical compensation films, consider that from the angle of optical characteristics and permanance the stretching product of cyclic olefine resin molding also are preferred.Here, so-called cyclic olefine resin molding is for example by having norborene, encircling the film that thermoplastic resin that norborneol alkene monomer etc. comprises the monomeric unit of cyclic olefin (cycloolefin) forms more.The cycloolefin mesentery can be to use single cycloolefin ring-opening polymerization polymer, use the hydride of the ring opening copolymer thing of the cycloolefin more than 2 kinds, also can be the addition copolymer of cycloolefin and chain alkene and/or aromatics etc. with vinyl.In addition, the compound that has imported polar group in main chain or side chain also is effective.
As commercially available thermoplasticity cyclic olefine resin, " ARTON " that " Topas " that sold by German Ticona company is arranged, sell by JSR (strain), " ZEONOR " and " ZEONEX " that sell by Japanese ZEON (strain), by " APEL " (being trade name) of Mitsui Chemicals (strain) sale etc., they can use well.Cyclic olefine resin system film with such can obtain the cyclic olefine resin molding.As film-forming method, can suitably use known method such as solvent cast method, extrusion by melting.In addition, for example, " エ ス シ one Na " and " SCA40 " sold by ponding chemical industry (strain), " the ZEONOR FILM " that sold by (strain) オ プ テ ス, to have made the cyclic olefine resin molding of film by " ARTON FILM " (being trade name) of JSR (strain) sale etc. also commercially available, and these also can use well.
About the thickness by the film formed optical compensation films of cyclic olefine resin of drawn, because blocked up then poor in processability, and the transparency reduces, and is unfavorable etc. for the slim lightweight of polaroid, therefore is preferably about 20～80 μ m.
Fit above-mentioned light polarizing film and diffusion barrier and use tackifier usually when fitting stacked as required diaphragm or optical compensation films and light polarizing film.Use the tackifier that forms by the solidification compound that contains epoxy resin when applying light polarizing film in the present invention, and diffusion barrier.By using such tackifier, can produce under the dysgenic situation with bonding light polarizing film of high bond strength and diffusion barrier in outward appearance not to polaroid.In addition; as applying light polarizing film and diaphragm or the employed tackifier of optical compensation films; can also use the known in the past tackifier such as water system tackifier that contain polyvinyl alcohol resin or polyurethane series resin as adhesive component; during the tackifier that uses when using tackifier of the same race, can realize the raising of production efficiency and the minimizing of raw material type with applying light polarizing film and diffusion barrier.
Here, in the present invention, so-called epoxy resin is meant to have the epoxy radicals of average out to more than 2 and compound or the polymkeric substance that solidifies by the polyreaction of following this epoxy radicals in molecule, according to the convention of this area, even be also referred to as epoxy resin for monomer.
As the epoxy resin that is contained in the above-mentioned solidification compound,, preferably use the epoxy resin that in molecule, does not contain aromatic rings from the viewpoint of weatherability, refractive index and cationically polymerizable etc.As such epoxy resin that in molecule, does not contain aromatic rings, can enumerate hydrogenated epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin etc.
Hydrogenated epoxy resin can be by making aromatic epoxy resin optionally carry out hydrogenation to obtain in the presence of catalyzer, adding to depress.As aromatic epoxy resin, can enumerate the diglycidyl ether of bisphenol-A for example, the diglycidyl ether of Bisphenol F, the such bisphenol-type epoxy resin of diglycidyl ether of bisphenol S; Phenol novolac epoxy resins, cresol novolak epoxy, the such phenol aldehyde type epoxy resin of hydroxy benzaldehyde phenol novolac epoxy resins; The multifunctional type epoxy resin that the glycidol ether of tetrahydroxy diphenyl-methane, the glycidol ether of tetrahydroxybenzophenone and epoxidation polyvinylphenol are such etc.The nuclear hydride of these aromatic epoxy resins (nuclear water adds thing) forms hydrogenated epoxy resin, wherein, as hydrogenated epoxy resin, the preferred glycidol ether that uses through the bisphenol-A of hydrogenation.
In addition, so-called alicyclic epoxy resin is meant to have 1 epoxy resin that is bonded in the epoxy radicals on the ester ring type ring at least in molecule.So-called " being bonded in the epoxy radicals on the ester ring type ring " has the structure shown in the following formula, and in the formula, m is 2～5 integer.
Therefore, so-called alicyclic epoxy resin is the compound that has structure shown in 1 above-mentioned formula in molecule at least.More specifically, with (the CH in the above-mentioned formula
2)
mIn one or more hydrogen remove and the group that obtains and other chemical constitution bondings and compound, can become alicyclic epoxy resin.(CH
2)
mIn one or more hydrogen, can also suitably replace with straight chain shape alkyl such as methyl, ethyls.
In above such alicyclic epoxy resin, has the epoxy resin of oxabicyclo hexane ring (m=3 in the above-mentioned formula), oxabicyclo heptane ring (m=4 in the above-mentioned formula), because therefore the bond strength excellence of light polarizing film and diffusion barrier is more preferably used.Below, particular instantiation the structure of the preferred in the present invention alicyclic epoxy resin that uses, but be not limited to these compounds.
(a) the epoxycyclohexyl methyl epoxycyclohexane carboxylate class shown in the following formula (I):
(in the formula, R
1And R
2The straight chain shape alkyl of representing hydrogen atom or carbon number 1～5 independently of each other.)
(b) the epoxycyclohexane carboxylate class of the alkane diol shown in the following formula (II):
(in the formula, R
3And R
4Represent the straight chain shape alkyl of hydrogen atom or carbon number 1～5 independently of each other, n represents 2～20 integer.)
(c) the epoxycyclohexyl methyl ester class of the dicarboxylic acid shown in the following formula (III):
(in the formula, R
5And R
6Represent the straight chain shape alkyl of hydrogen atom or carbon number 1～5 independently of each other, p represents 2～20 integer.)
(d) the epoxycyclohexyl methyl ethers of the polyglycol shown in the following formula (IV):
(in the formula, R
7And R
8Represent the straight chain shape alkyl of hydrogen atom or carbon number 1～5 independently of each other, q represents 2～10 integer.)
(e) the epoxycyclohexyl methyl ethers of the alkane diol shown in the following formula (V):
(in the formula, R
9And R
10Represent the straight chain shape alkyl of hydrogen atom or carbon number 1～5 independently of each other, r represents 2～20 integer.)
(f) bicyclic oxygen three spiro-compounds shown in the following formula (VI):
(in the formula, R
11And R
12The straight chain shape alkyl of representing hydrogen atom or carbon number 1～5 independently of each other.)
(g) the bicyclic oxygen list spiro-compound shown in the following formula (VII):
(in the formula, R
13And R
14The straight chain shape alkyl of representing hydrogen atom or carbon number 1～5 independently of each other.)
(h) the vinyl cyclohexene diepoxide class shown in the following formula (VIII):
(in the formula, R
15The straight chain shape alkyl of expression hydrogen atom or carbon number 1～5.)
(i) the epoxide ring amyl group ethers shown in the following formula (IX):
(in the formula, R
16And R
17The straight chain shape alkyl of representing hydrogen atom or carbon number 1～5 independently of each other.)
(j) the bicyclic oxygen tristane shown in the following formula (X) (diepoxy tricyclodecane) class:
(in the formula, R
18The straight chain shape alkyl of expression hydrogen atom or carbon number 1～5.)
In above-mentioned illustrative alicyclic epoxy resin, for following alicyclic epoxy resin, owing to having commercially available or its analog compares reasons such as being easier to acquisition and sets out, the preferred use.
(A) carboxylate of 7-oxabicyclo [4.1.0] heptane-3-carboxylic acid and (7-oxa--two ring [4.1.0] heptan-3-yl) methyl alcohol [in above-mentioned formula (I), R
1=R
2The compound of=H]
(B) carboxylate of 4-methyl-7-oxabicyclo [4.1.0] heptane-3-carboxylic acid and (4-methyl-7-oxa--two ring [4.1.0] heptan-3-yl) methyl alcohol [in above-mentioned formula (I), R
1=4-CH
3, R
2=4-CH
3Compound]
(C) 7-oxabicyclo [4.1.0] heptane-3-carboxylic acid and 1, and the carboxylate of 2-ethylene glycol [in above-mentioned formula (II), R
3=R
4The compound of=H, n=2],
(D) carboxylate of (7-oxabicyclo [4.1.0] heptan-3-yl) methyl alcohol and hexane diacid [in above-mentioned formula (III), R
5=R
6The compound of=H, p=4]
(E) carboxylate of (4-methyl-7-oxabicyclo [4.1.0] heptan-3-yl) methyl alcohol and hexane diacid [in above-mentioned formula (III), R
5=4-CH
3, R
6=4-CH
3, p=4 compound]
(F) (7-oxabicyclo [4.1.0] heptan-3-yl) methyl alcohol and 1, and the etherate of 2-ethylene glycol [in above-mentioned formula (V), R
9=R
10The compound of=H, r=2]
In addition, as above-mentioned aliphatic epoxy resin, can enumerate the polyglycidyl ether of aliphatic polyol or its alkylene oxide addition product.More specifically, can enumerate 1, the diglycidyl ether of 4-butylene glycol, 1, the diglycidyl ether of the triglycidyl ether of the diglycidyl ether of 6-hexanediol, the triglycidyl ether of glycerine, trimethylolpropane, the diglycidyl ether of polyglycol, propylene glycol, on the such aliphatic polyol of ethylene glycol, propylene glycol and glycerine addition more than a kind or 2 kinds alkylene oxide (oxirane, epoxypropane) and polyglycidyl ether of the polyether glycol that obtains etc.
In the present invention, epoxy resin can only use a kind separately, and perhaps also two or more kinds may be used.
The epoxide equivalent of the epoxy resin that uses among the present invention is 30～3000g/ equivalent normally, the scope of preferred 50～1500g/ equivalent.When epoxide equivalent hour, there is the flexible reduction of the adhesive layer after solidifying, or the possibility that reduces of bond strength.And when epoxide equivalent is big, the possibility that the compatibility of existence and other compositions reduces.
In the present invention, from reactive viewpoint, preferably use cationic polymerization as the curing reaction of epoxy resin.Therefore, preferably in solidification compound, cooperate cationic polymerization initiators.Cationic polymerization initiators produces kation kind or lewis acid by the irradiation of luminous ray, ultraviolet ray, X ray, electron ray isoreactivity energy line or by heating, causes the polyreaction of epoxy radicals.The cationic polymerization initiators of any type all is endowed potentiality, from the viewpoint of operation and preferred.Cationic polymerization initiators roughly is divided into irradiation by luminous ray, ultraviolet ray, X ray, electron ray isoreactivity energy line and produces kation kind or lewis acidic cationic polymerization light trigger and produce kation kind or lewis acidic cationic polymerization thermal initiator by heating.
Below, the cationic polymerization light trigger is described.When using the cationic polymerization light trigger,, therefore reduced the thermotolerance of considering light polarizing film or, can adaptation well diffusion barrier be bonded on the light polarizing film because of the necessity of the distortion due to expanding because tackifier can be in normal temperature cure.In addition, because the cationic polymerization light trigger is by the effect of photocatalytic ground, even therefore be mixed in also excellence of storage stability in the epoxy resin, operation.As the cationic polymerization light trigger, be not particularly limited, can enumerate the such salt of aromatic series diazo salt for example, aromatic series salt compounded of iodine, aromatic series sulfonium salt and fragrant luxuriant iron complex compound etc.
As the aromatic series diazo salt, can enumerate for example benzene diazonium hexafluoro antimonate, benzene diazonium hexafluorophosphate and benzene diazonium hexafluoro borate etc.
As the aromatic series salt compounded of iodine, can enumerate for example diphenyl iodonium four (pentafluorophenyl group) borate, diphenyl iodonium hexafluorophosphate, diphenyl iodonium hexafluoro antimonate and two (4-nonyl phenyl) iodine hexafluorophosphate etc.
As the aromatic series sulfonium salt, can enumerate for example triphenylsulfonium hexafluorophosphate, the triphenylsulfonium hexafluoro antimonate, triphenylsulfonium four (pentafluorophenyl group) borate, 4, the two hexafluorophosphates of 4 '-two [diphenyl sulfonium] diphenyl sulfide, 4, the two hexafluoro antimonates of 4 '-two [two (beta-hydroxy ethoxy) phenyl sulfonium] diphenyl sulfide, the two hexafluorophosphates of 4,4 '-two [two (beta-hydroxy ethoxy) phenyl sulfonium] diphenyl sulfide, 7-[two (p-methylphenyl) sulfonium]-2-isopropyl thioxanthone hexafluoro antimonate, 7-[two (p-methylphenyl) sulfonium]-2-isopropyl thioxanthone four (pentafluorophenyl group) borate, 4-phenylcarbonyl group-4 '-diphenyl sulfonium-diphenyl sulfide hexafluorophosphate, 4-(to the tert-butyl-phenyl carbonyl)-4 '-diphenyl sulfonium-diphenyl sulfide hexafluoro antimonate and 4-(to the tert-butyl-phenyl carbonyl)-4 '-two (p-methylphenyl) sulfonium-diphenyl sulfide four (pentafluorophenyl group) borate etc.
In addition, as the luxuriant iron complex compound of virtue, can enumerate for example dimethylbenzene-cyclopentadienyl group iron (II) hexafluoro antimonate, isopropyl benzene-cyclopentadienyl group iron (II) hexafluorophosphoric acid ester and dimethylbenzene-cyclopentadienyl group iron (II)-three (trifluoromethyl sulphonyl) methanides etc.
These cationic polymerization light triggers can easily obtain commercially available product, for example, if name with trade name respectively, then can enumerate " Kayarad PCI-220 ", " Kayarad PCI-620 " (above) by Nippon Kayaku K. K's system, " UVI-6990 " (associating carbonide (UnionCarbide) corporate system), " Adeka Optomer SP-150 ", " Adeka Optomer SP-170 " (above) by the ADEKA corporate system, " CI-5102 ", " CIT-1370 ", " CIT-1682 ", " CIP-1866S ", " CIP-2048S ", " CIP-2064S " (above) by Tso Tat Co., Ltd., Japan's system, " DPI-101 ", " DPI-102 ", " DPI-103 ", " DPI-105 ", " MPI-103 ", " MPI-105 ", " BBI-101 ", " BBI-102 ", " BBI-103 ", " BBI-105 ", " TPS-101 ", " TPS-102 ", " TPS-103 ", " TPS-105 ", " MDS-103 ", " MDS-105 ", " DTS-102 ", " DTS-103 " (above) by greening Co., Ltd. system, " PI-2074 " (Luo Diya (Rhodia) corporate system) etc.Wherein, " CI-5102 " of Tso Tat Co., Ltd., Japan's system is one of preferred cation polymerization light initiating agent.
Above-mentioned cationic polymerization light trigger can be distinguished use separately, also can mix more than 2 kinds and use.Wherein, aromatic series sulfonium salt especially, even if the wavelength coverage more than 300nm also has the UVA characteristic, the therefore solidfied material that the curable excellence can be provided, have good mechanical strength and bond strength, therefore preferred the use.
The use level of cationic polymerization light trigger is with respect to epoxy resin 100 weight portions, 0.5～20 weight portion normally, and preferred 1 weight portion is above and below preferred 15 weight portions.When use level was very few, curing became insufficient, and physical strength, bond strength reduce.On the other hand, when use level was too much, the ionic substance in the solidfied material increased, so the raising of the hydroscopicity of solidfied material, had the possibility of the endurance quality reduction of polaroid.
When having added the cationic polymerization light trigger in the solidification compound, can also further and use photosensitizer as required.By using photosensitizer, the reactive raising can make the physical strength of solidfied material, bond strength improve.As photosensitizer, for example can enumerate carbonyls, organosulfur compound, persulfide, redox based compound, azo and diazo-compounds, halogenide, photo-reduction pigment etc.As concrete photosensitizer, for example can enumerate benzoin methylether, benzoin iso-propylether, α, the alpha, alpha-dimethyl oxygen base-α-such benzoin derivatives of phenyl acetophenone; Benzophenone, 2,4-dichloro benzophenone, o-benzoyl yl benzoic acid methyl esters, 4,4 '-two (dimethylamino) benzophenone, 4, the 4 '-such benzophenone derivates of two (lignocaine) benzophenone; 2-clopenthixal ketone, the such thioxanthone derivates of 2-isopropyl thioxanthone; 2-chloroanthraquinone, the such anthraquinone derivative of 2-methylanthraquinone; N-methylacridine ketone, the such acridone derivatives of N-butyl acridone; In addition, α, α-diethoxy acetophenone, benzil, Fluorenone, xanthone, uranyl compound, halogenide etc., but be not limited to these photosensitizers.In addition, these photosensitizers can be used alone, but also also mix together respectively.The content of photosensitizer is preferably the scope of 0.1～20 weight portion in solidification compound 100 weight portions.
Below, the cationic polymerization thermal initiator is described.As producing kation kind or lewis acidic cationic polymerization thermal initiator, can enumerate benzyl sulfonium salt, thiophene salt, thiophane salt (チ オ ラ ニ ウ system salt), benzyl ammonium salt, pyridiniujm, hydrazonium salt, carboxylate, sulphonic acid ester, amine acid imide etc. by heating.These initiating agents can easily obtain commercially available product, if name with trade name respectively, then can enumerate " ADEKA OPTON CP77 " and " ADEKAOPTON CP66 " (above), " CI-2639 " and " CI-2624 " (above), " San-Aid SI-60L ", " San-Aid SI-80L " and " San-Aid SI-100L " (above) etc. by three new chemical industry Co., Ltd. systems by Tso Tat Co., Ltd., Japan's system by Asahi Denka Kogyo K. K's system.
And also be useful technology with the cationic polymerization light trigger and the cationic polymerization thermal initiator of above explanation.
In the present invention, the solidification compound that contains epoxy resin that uses as tackifier can also further contain the compound that oxetanes class, polyvalent alcohol etc. promote cationic polymer.
The oxetanes class is the compound that has the four-membered ring ether structure in molecule, can enumerate for example 3-ethyl-3-hydroxymethyl oxetanes, 1, two [(3-ethyl-3-oxetanyl) methoxy] benzene of 4-, 3-ethyl-3-(phenoxymethyl) oxetanes, two [(3-ethyl-3-oxetanyl) methyl] ether, 3-ethyl-3-(2-ethyl hexyl oxy methyl) oxetanes and phenol phenolic aldehyde oxetanes etc.These oxetanes classes can easily obtain commercially available product, for example, all, can enumerate " ARON OXETANE OXT-101 ", " ARONOXETANE OXT-121 ", " ARON OXETANE OXT-211 ", " ARONOXETANE OXT-221 ", " ARON OXETANE OXT-212 " (above is East Asia Synesis Company system) etc. with the trade name name.Use level to the oxetanes class is not particularly limited, but is 5～95 weight % usually in solidification compound, preferred 30～70 weight %.
As polyalcohols, the polyalcohols that preferably has the acidic-group beyond the phenol hydroxyl can be enumerated the polyol compound that for example do not have the functional group beyond the hydroxyl, polyester polyols alcoholic compound, polycaprolactone polyol compound, the polyol compound with phenol hydroxyl, polycarbonate polyol compound etc.The molecular weight of these polyalcohols is generally more than 48, is preferably more than 62, more preferably more than 100, and is preferably below 1000.The use level of these polyvalent alcohols is generally in solidification compound below the 50 weight %, below the preferred 30 weight %.
And then, only otherwise damage effect of the present invention, can cooperate other adjuvants in the solidification compound as the tackifier use, for example ion-trapping agent, antioxidant, chain-transferring agent, sensitizer, tackifier, thermoplastic resin, filling agent, flow modifier, plastifier, defoamer etc.Ion-trapping agent comprises the mineral compound of for example pulverous bismuth system, antimony system, magnesium system, aluminium system, calcium system, titanium system and their mixed stocker etc., and antioxidant comprises that for example hindered phenol is an antioxidant etc.
When applying light polarizing film and diffusion barrier, at first, will be coated on the binding face of light polarizing film and/or diffusion barrier by the tackifier that the solidification compound that contains above-mentioned epoxy resin forms.The coating method of tackifier is not particularly limited, and for example can utilizing, scraper is coated with, the coiling rod is coated with, mould is coated with, various application pattern such as comma is coated with, intaglio plate coating.In addition, because all there is the suitableeest range of viscosities in each application pattern, therefore using solvent to carry out the viscosity adjustment also is useful technology.The solvent of this kind purposes uses the optical property that can not make light polarizing film to reduce and solvent that can dissolving cured well property composition, and its kind is not particularly limited.For example can use with toluene as the hydro carbons of representative, with the organic solvents such as ester class of ethyl acetate as representative.
By stacked film on light polarizing film, getting by uncured adhesive layer applying diffusion barrier, shine active energy beam subsequently or heat, thereby the adhesive layer that is formed by solidification compound is solidified, diffusion barrier is solidified on light polarizing film.The thickness of the adhesive layer after the curing is generally below the 50 μ m, below the preferred 20 μ m, more preferably below the 10 μ m.In addition, light polarizing film with a side opposition side that is laminated with diffusion barrier on when applying diaphragm or optical compensation films, also can similarly carry out with above-mentioned.
Before to light polarizing film applying diffusion barrier, diaphragm, optical compensation films, can implement easily adhesion process such as Corona discharge Treatment, Cement Composite Treated by Plasma, primary coat (anchor coating) processing to the binding face of these films.
When carrying out polymerizing curable by the irradiation active energy beam, the light source that uses is not particularly limited, and can use for example low pressure mercury lamp that has luminescence distribution below wavelength 400nm, medium pressure mercury lamp, high-pressure sodium lamp, ultrahigh pressure mercury lamp, chemical lamp, black lamp, microwave-excitation mercury lamp, metal halide lamp etc.To solidification compound carry out light-struck rayed intensity according to each as the decision of composition of object, be not particularly limited, preferably the exposure intensity to the effective wavelength coverage of activation of initiating agent is 0.1～100mW/cm
2Rayed undercapacity 0.1mW/cm to solidification compound
2The time, the reaction time is long, is surpassing 100mW/cm
2The time, because the heat release during from the heat of lamp radiation and solidification compound generation polymerization exists the xanthochromia that produces solidification compound, the possibility of light polarizing film variation.Rayed time of solidification compound is treated that by each cured compositions controls, still is not particularly limited that preferably setting with the represented accumulative total light quantity of the product of exposure intensity and irradiation time is 10～5000mJ/cm
2At accumulative total deficiency in light quantity 10mJ/cm to the solidification compound irradiation
2The time, insufficient from the generation of the spike of initiating agent, there is the inadequate possibility of curing of adhesive layer.On the other hand, surpass 5000mJ/cm in the accumulative total light quantity
2The time, it is very long that irradiation time becomes, and also is unfavorable for the raising of throughput rate.
When utilizing heat to carry out polymerization, can using usually, known method heats, its condition etc. also is not particularly limited, and produces the kation kind, heats more than the lewis acidic temperature, usually 50～200 ℃ of enforcements by the cationic polymerization thermal initiator that is cooperated in solidification compound.
In addition; when irradiation active energy beam or add was cured under arbitrary condition of pining for, also the scope that preferably can not reduce in all functions of transparent such polaroid of degree of polarization, transmissivity and the form and aspect of light polarizing film and diffusion barrier, diaphragm and optical compensation films was cured.
About polaroid of the present invention, on light polarizing film two-sided, during stacked diffusion barrier, preferably on a side diffusion barrier, has adhesive phase.About polaroid of the present invention, on a face of light polarizing film during stacked diffusion barrier, preferably has adhesive phase (being laminated with on this face under the situation of diaphragm or optical compensation films, then on this film) on other faces.As the bonding agent that uses in such adhesive phase, can use known in the past suitable adhesive ad lib, can enumerate for example acrylic adhesive, polyurethane series bonding agent, silicone-based adhesive etc.Wherein, from the viewpoint of the transparency, bounding force, reliability, re-workability etc., preferably use acrylic adhesive.Adhesive phase can be provided with by following method, promptly, such bonding agent is made for example organic solvent solution, it is coated on base material film (for example light polarizing film etc.) with a mouthful mould coating machine, intaglio plate coating machine etc. goes up and make it dry method, in addition can also be provided with by the following method, that is, will go up the method for sheet bonding agent transfer printing on base material film that forms at the plastic foil (being called barrier film) of having implemented demoulding processing.Thickness for adhesive phase also is not particularly limited, and is general preferred in the scope of 2～40 μ m.
On the face that is formed with adhesive phase of polaroid, can be by this adhesive phase and applying optical functional film.As the optical functional film, for example can enumerate the optical compensation films that is oriented at substrate surface coating fluid crystallinity compound and liquid crystal compounds; The reflection type polarizing film of the polarized light of certain polarized light of transmission, reflection demonstration and its opposite nature; The phase retardation film that forms by polycarbonate-based resin; By the phase retardation film that cyclic polyolefin hydrocarbon system resin-shaped becomes, the surface has the film with anti-dazzle function of concaveconvex shape; The film of the anti-surface reflection function of band; The surface has the reflectance coating of reflection function; And has Transflective film of reflection function and transmission function etc. in the lump, as the commercially available product of the optical compensation films that is equivalent to be oriented, can enumerate " WV film " (Fuji Photo-Film (strain) system), " NH film " (Nippon Oil(Nippon Mitsubishi Oil) (strain) system), " NR film " (Nippon Oil(Nippon Mitsubishi Oil) (strain) system) etc. at substrate surface coating fluid crystallinity compound and liquid crystal compounds.As be equivalent to certain polarized light of transmission, reflection shows and the commercially available product of the reflection type polarizing film of the polarized light of its opposite nature, can enumerate for example " DBEF " (3M corporate system, can buy from Sumitomo 3M (strain) in Japan), " APF " (the 3M corporate system can be buied from Sumitomo 3M (strain) in Japan) etc.In addition, as the commercially available product of the phase retardation film that is equivalent to become, for example can enumerate " ARTON film " (JSR (strain) system), " エ ス シ one Na " (ponding chemical industry (strain) system), " ZEONOR FILM " ((strain) オ プ テ ス system) etc. by cyclic polyolefin hydrocarbon system resin-shaped.
Polaroid of the present invention can be well uses as the rear side polaroid that disposes between liquid crystal cells that liquid crystal indicator had and backlight.
＜liquid crystal panel and liquid crystal indicator 〉
Liquid crystal panel of the present invention has the polaroid of liquid crystal cells and the invention described above, on a face of the light polarizing film of polaroid, be laminated with diffusion barrier, be laminated with liquid crystal cells on light polarizing film and the face face opposition side that is laminated with diffusion barrier, polaroid and liquid crystal cells are fitted by above-mentioned adhesive phase usually.Liquid crystal panel of the present invention like this is applied to liquid crystal indicator in the mode (being disposed at mode between liquid crystal cells and the backlight with polaroid of the present invention) that its diffusion barrier becomes source backlight usually.About liquid crystal panel of the present invention, usually (looking when being applied to liquid crystal indicator recognized side in the front face side of liquid crystal cells, a side opposite) also be provided with polaroid with a side that is laminated with polaroid of the present invention, but the polaroid for the front face side of being located at this liquid crystal cells is not particularly limited, and can use known in the past suitable polaroid.Can enumerate and for example implement non-glare treated, hard conating is handled, antireflection is handled polaroid etc.In addition, can be the polaroid that on the single face of light polarizing film, is laminated with polyethylene terephthalate film, acrylic film, polypropylene screen.
Liquid crystal indicator of the present invention has with diffusion barrier becomes the liquid crystal panel that the mode of source backlight disposes.Liquid crystal indicator of the present invention like this, be laminated with the liquid crystal panel that polaroid of the present invention obtains by the rear side that has at liquid crystal cells, the dhering strength excellence of light polarizing film and diffusion sheet, has high-durability, and have corresponding to thin-walled property and enough physical strengths, and then, the diffusion barrier of polaroid of the present invention disposed by rear side at liquid crystal panel, can prevent the driving fit of liquid crystal panel and back light source system, further improve visibility.
About liquid crystal indicator of the present invention, for the formation beyond the above-mentioned liquid crystal panel, can adopt the suitable formation of known liquid crystal indicator in the past, can enumerate the formation that for example has the liquid crystal panel of backlight, light diffusing sheet and the invention described above successively, and the formation that has the liquid crystal panel of backlight, light diffusing sheet, light diffusing sheet and the invention described above successively.Under the former situation, liquid crystal panel is configured with the mode that light diffusing sheet is faced mutually with the diffusion barrier of polaroid, and under the latter's the situation, liquid crystal panel is configured with the mode that light diffusing sheet is faced mutually with the diffusion barrier of polarization plates.About liquid crystal indicator of the present invention, because the polaroid of the present invention self that uses as the rear side polaroid has been endowed light diffusing, therefore the light diffusing sheet of in the past being located on the light diffusing sheet can be partially or completely omitted, thus, the slim lightweight of liquid crystal indicator can be realized.
Embodiment
Below, enumerate embodiment, further describe the present invention, but the present invention is not subjected to the qualification of these embodiment.In addition, in the example, the % of expression content or use amount and part are weight basis unless otherwise specified.In the following example, mist degree is meant the value that use is measured in the haze meter HM-150 type (color technical institute system in (strain) village) of JIS K 7136 regulations.
(Production Example: the making of light polarizing film)
Will be about 2400 by average degree of polymerization, after the polyvinyl alcohol film of thickness 75 μ m that 99.9 moles of polyvinyl alcohol (PVA) more than the % of saponification degree form is immersed in 30 ℃ the pure water, in 30 ℃ of weight ratios that are immersed in iodine/potassium iodide/water are 0.02/2/100 aqueous solution.Then, in 56.5 ℃ of weight ratios that are immersed in potassium iodide/boric acid/water are 12/5/100 aqueous solution.Then, after the washing of 8 ℃ pure water, carry out drying, obtain on polyvinyl alcohol film, being adsorbed with the light polarizing film that iodine and iodine are oriented at 65 ℃.Stretch and mainly carry out in iodine staining and boric acid treatment process, total stretching ratio is 5.3 times.
＜embodiment 1 〉
In the cup of 100ml, measure the trade name as hydrogenated epoxy resin " EPICOAT the YX8000 " (diglycidyl ether of nuclear hydrogenated bisphenol A of Japan Epoxy Resins (strain) system, epoxide equivalent with about 205g/ equivalent) trade name as photosensitizer " CS7001 " 1.0g of the trade name as the cationic polymerization light trigger of 10.0g, Tso Tat Co., Ltd., Japan's system " CI5102 " 4.0g and Tso Tat Co., Ltd., Japan's system, mix, deaeration, the tackifier that preparation is formed by the solidification compound that contains epoxy resin.
Then, by above-mentioned tackifier, on fit diffusion barrier (mixing mean grain size 5 μ m the acrylic acid pearl in polycarbonate resin of thick 80 μ m, mist degree 15% of a face of the light polarizing film that obtains as mentioned above, melt extrude and be shaped to membranaceous film), the tri acetyl cellulose membrane (thick 80 μ m, KONICA MINOLTA Opto corporate system) of on another face, fitting.(uviol lamp uses " HAL400NL " of 80W at the ultraviolet lamp of Nippon Storage Battery Co., Ltd's system then, irradiation distance is 50cm) in, make it pass through 1 time with linear velocity 1.0m/min, thereby make adhesive layer curing, obtain polaroid in the two-sided formation of light polarizing film.
About the polaroid that obtains, light polarizing film and diffusion barrier are closely fitted, and not only have good surface appearance, and the curable of tackifier is also good.In addition, estimate the adaptation of diffusion barrier to light polarizing film with the cross-hatching of JIS K 5400 records, the unstripped grid number of result is 100/100 with respect to the grid number that forms, and demonstrates good adaptation.
The layer of the acrylic adhesive of thickness 25 μ m is set at the outside surface of the tri acetyl cellulose membrane of this polaroid then.Then, this polaroid is fitted in the back side of liquid crystal cells by this adhesive phase, the commercially available polaroid of fitting in the front of liquid crystal cells is assembled into liquid crystal panel, and itself and commercially available light diffusing sheet, backlight are made up, and makes liquid crystal indicator.With the demonstration situation of visualization liquid crystal indicator, see bright image from the front, visibility is good.
＜embodiment 2 〉
Use the diffusion barrier of thick 100 μ m, mist degree 86% (in the resin combination that contains acrylic polyol, isocyanates, MEK and toluene, to mix the acrylic acid pearl of mean grain size 20 μ m and make coating liquid, this coating liquid is coated in the surface of transparent polyester system base material film of thick 100 μ m and the film made) replace the diffusion barrier of thick 80 μ m, mist degree 15%, in addition operation similarly to Example 1 obtains polaroid.
About the polaroid that obtains, light polarizing film and diffusion barrier are closely fitted, and not only have good surface appearance, and the curable of tackifier is also good.In addition, estimate the adaptation of diffusion barrier to light polarizing film with the cross-hatching of JIS K 5400 records, the unstripped grid number of result is 100/100 with respect to the grid number that forms, and demonstrates good adaptation.
The layer of the acrylic adhesive of thickness 25 μ m is set at the outside surface of the tri acetyl cellulose membrane of this polaroid then.Then, this polaroid is fitted in the back side of liquid crystal cells by this adhesive phase,, is assembled into liquid crystal panel, itself and commercially available light diffusing sheet, backlight are made up, make liquid crystal indicator at the commercially available polaroid of the former configuration of liquid crystal cells.With the demonstration situation of visualization liquid crystal indicator, see bright image from the front, visibility is good.
＜comparative example 1 〉
Use the aqueous polyurethane tackifier to replace the tackifier that is formed by the solidification compound that contains epoxy resin, all the other carry out similarly to Example 1, make polaroid.Consequently, produce big space between light polarizing film and the diffusion barrier, fail to make polaroid with good appearance.In addition, for the polaroid that obtains, diffusion barrier can be peeled off with hand simply, and is basic just not bonding with light polarizing film.
This disclosed embodiment and embodiment are illustration in all respects, are not limited to this.Scope of the present invention is not above-mentioned explanation, but is illustrated by the scope of protection of present invention, comprises the meaning that is equal to the scope of protection of present invention and all changes in scope.
According to the present invention, can provide the good polaroid with light diffusing and the liquid crystal panel of bond strength height, outward appearance of diffusion barrier and light polarizing film.In addition, according to the present invention, can realize the reduction of the thin-walled property and the member number of packages of liquid crystal indicator.Liquid crystal indicator of the present invention like this can be well as big picture liquid crystal display television by using liquid crystal indicator, especially can wall hanging the liquid crystal display television by using liquid crystal indicator use.
Claims (8)
1. polaroid, have: by be adsorbed with the film formed light polarizing film of uniaxial tension polyvinyl alcohol resin that iodine or dichroic dye and described iodine or dichroic dye be oriented and at least one face of described light polarizing film by adhesive layer and stacked mist degree is the diffusion barrier more than 1%, described adhesive layer is formed by the solidfied material of the solidification compound that contains epoxy resin.
2. polaroid according to claim 1, wherein, described epoxy resin does not have aromatic rings in molecule.
3. polaroid according to claim 1 and 2, wherein, the stacked diffusion barrier of stating to some extent is laminated with optical compensation films or diaphragm on another face on a face of described light polarizing film.
4. according to each described polaroid in the claim 1～3, wherein, the mist degree of described diffusion barrier is more than 5%.
5. according to each described polaroid in the claim 1～4, be the rear side polaroid that disposes between the liquid crystal cells that has at liquid crystal indicator and the backlight.
6. liquid crystal panel, has each described polaroid in liquid crystal cells and the claim 1～5, on a face of the described light polarizing film of described polaroid, be laminated with diffusion barrier, the stacked liquid crystal cells of stating to some extent on described light polarizing film and the face face opposition side that is laminated with described diffusion barrier.
7. a liquid crystal indicator has the described liquid crystal panel of backlight, light diffusing sheet and claim 6 successively, and described liquid crystal panel disposes with the mode that described light diffusing sheet is faced mutually with the described diffusion barrier of described polaroid.
8. a liquid crystal indicator has the described liquid crystal panel of backlight, light diffusing sheet, light diffusing sheet and claim 6 successively, and described liquid crystal panel disposes with the mode that described light diffusing sheet is faced mutually with the described diffusion barrier of described polaroid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-253580 | 2008-09-30 | ||
| JP2008253580A JP2010085626A (en) | 2008-09-30 | 2008-09-30 | Polarizing plate, liquid crystal panel using it, and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101713840A true CN101713840A (en) | 2010-05-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910174535A Pending CN101713840A (en) | 2008-09-30 | 2009-09-28 | Polarizing plate, liquid crystal panel and liquid crystal display |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2010085626A (en) |
| KR (1) | KR20100036960A (en) |
| CN (1) | CN101713840A (en) |
| TW (1) | TWI588546B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102422188A (en) * | 2009-05-14 | 2012-04-18 | 住友化学株式会社 | Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101565628B1 (en) | 2011-09-29 | 2015-11-04 | 주식회사 엘지화학 | Composition for optical elemet |
| KR101526032B1 (en) * | 2011-11-14 | 2015-06-05 | 주식회사 엘지화학 | Composition for optical elemet |
| CN105849601B (en) | 2013-12-26 | 2019-04-12 | 住友化学株式会社 | Polarizer and polarization plates and polarizability stacked film with the polarizer |
| CN109661601B (en) | 2016-09-06 | 2022-02-01 | 住友化学株式会社 | Polarizing plate and method for manufacturing same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010017129A (en) * | 1999-08-09 | 2001-03-05 | 성재갑 | A screen for liquid crystal display front projector |
| JP2004245925A (en) * | 2003-02-12 | 2004-09-02 | Sumitomo Chem Co Ltd | Polarizing plate, its manufacturing method, optical member, and liquid crystal display device |
| CN1641442A (en) * | 2004-01-14 | 2005-07-20 | 山本塑料工业株式会社 | Back-light mechanism for liquid crystal display device |
| CN101038391A (en) * | 2006-03-16 | 2007-09-19 | 瀚宇彩晶股份有限公司 | Twisted nematic liquid crystal display |
| CN101040199A (en) * | 2004-10-21 | 2007-09-19 | 日东电工株式会社 | Antistatic optical film, antistatic adhesive optical film and image display |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400492B (en) * | 2006-03-20 | 2012-07-25 | 三井化学株式会社 | Optical film and method for producing same |
| TW200809277A (en) * | 2006-05-17 | 2008-02-16 | Sumitomo Chemical Co | Polarizing plate, method for manufacturing the polarizing plate, laminated optical member, and liquid crystal display device |
| JP2008102475A (en) * | 2006-09-21 | 2008-05-01 | Fujifilm Corp | Polarizing plate and liquid crystal display device |
| JP5228345B2 (en) * | 2006-12-07 | 2013-07-03 | 住友化学株式会社 | Polarizing plate, elliptically polarizing plate, and liquid crystal display device |
-
2008
- 2008-09-30 JP JP2008253580A patent/JP2010085626A/en not_active Withdrawn
-
2009
- 2009-09-22 TW TW098131855A patent/TWI588546B/en not_active IP Right Cessation
- 2009-09-25 KR KR1020090090947A patent/KR20100036960A/en not_active Application Discontinuation
- 2009-09-28 CN CN200910174535A patent/CN101713840A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010017129A (en) * | 1999-08-09 | 2001-03-05 | 성재갑 | A screen for liquid crystal display front projector |
| JP2004245925A (en) * | 2003-02-12 | 2004-09-02 | Sumitomo Chem Co Ltd | Polarizing plate, its manufacturing method, optical member, and liquid crystal display device |
| CN1641442A (en) * | 2004-01-14 | 2005-07-20 | 山本塑料工业株式会社 | Back-light mechanism for liquid crystal display device |
| CN101040199A (en) * | 2004-10-21 | 2007-09-19 | 日东电工株式会社 | Antistatic optical film, antistatic adhesive optical film and image display |
| CN101038391A (en) * | 2006-03-16 | 2007-09-19 | 瀚宇彩晶股份有限公司 | Twisted nematic liquid crystal display |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102422188A (en) * | 2009-05-14 | 2012-04-18 | 住友化学株式会社 | Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI588546B (en) | 2017-06-21 |
| TW201022738A (en) | 2010-06-16 |
| JP2010085626A (en) | 2010-04-15 |
| KR20100036960A (en) | 2010-04-08 |
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Application publication date: 20100526 |