CN101887143B - Polarizer protection film, polarizing plate and liquid crystal display element - Google Patents
Polarizer protection film, polarizing plate and liquid crystal display element Download PDFInfo
- Publication number
- CN101887143B CN101887143B CN201010180638.XA CN201010180638A CN101887143B CN 101887143 B CN101887143 B CN 101887143B CN 201010180638 A CN201010180638 A CN 201010180638A CN 101887143 B CN101887143 B CN 101887143B
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- CN
- China
- Prior art keywords
- polarization element
- substrate layer
- polarizer
- liquid crystal
- diaphragm
- Prior art date
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- 238000000137 annealing Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 229940106691 bisphenol a Drugs 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical class CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229920001727 cellulose butyrate Polymers 0.000 description 1
- 229920006218 cellulose propionate Polymers 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010931 ester hydrolysis Methods 0.000 description 1
- SACULBVNXTWJOD-UHFFFAOYSA-N ethane (2-hydroxy-4-methoxyphenyl)-phenylmethanone Chemical class CC.OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 SACULBVNXTWJOD-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 235000013773 glyceryl triacetate Nutrition 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- YAFOVCNAQTZDQB-UHFFFAOYSA-N octyl diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(=O)(OCCCCCCCC)OC1=CC=CC=C1 YAFOVCNAQTZDQB-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a polarizer protection film, polarizing plate and liquid crystal display element, which is object to provide a easy-felt shape polarizer protection film made of novel cellulose ester according to the polarizer composed of polyvinyl alcohol, and a polarizing plate having the polarizer protection film, and liquid crystal display element. The polarizer protection film of the invention ahs a transparent substrate layer made of cellulose ester, and has micro convexo-concave shapes formed in the substrate layer, the arithmetic surface roughness (Ra) of the inner surface of the substrate layer is from 1 [mu]m to 10 [mu]m. The average roughness (Rz) of ten points of the inner surface of the substrate layer is from 2 [mu]m to 60 [mu]m, the roughness ratio (Rz/Ra) of the average roughness (Rz) of ten points of the inner surface of the substrate layer relative to the arithmetic average roughness (Ra) is preferably from 1 to 15.
Description
Technical field
The present invention relates to a kind of polarization element diaphragm, there is the Polarizer of polarization element diaphragm and there is the liquid crystal display cells of Polarizer.
Background technology
In recent years, because liquid crystal indicator (liquid crystal display, LCD) is for slim, light weight and power consumption is little, therefore can replaces cathode-ray tube (CRT) (cathode ray tube, CRT) and widely use.The use field of liquid crystal indicator is expanded in meter for car, large-scale product such as computer (personal computer, PC) display, TV etc. from small-sized product such as counter in the past or clocks.
As shown in Figure 5, the common liquid crystal display cells 21 be configured on liquid crystal indicator has: liquid crystal cells 25, and it clamps liquid crystal layer 27 by the transparent dielectric layer 26 (such as glass) in two faces to form; Polarizer 22, its be have polarisation can two faces of polarization element 24 polarization element diaphragm 23 of fitting via solid form; And there is the structure certainly being clamped liquid crystal cells 25 via adhesion agent layer 28 by Polarizer 22 up and down.As mentioned above, consider from improving intensity and making operation become easy viewpoint, protect polarization element 24 by polarization element diaphragm 23.
The material of polarization element is used as the polyvinyl alcohol (PVA) (polyvinylalcohol of hydrophilic resin usually, PVA), by by after PVA film uniaxial extension, dye with iodine or dichroic dye, or extend after dyeing, then carry out crosslinked with boron compound and form polarization element.In addition, polarization element diaphragm requires to have optically transparent and birefringence is little, with the characteristic such as the adherence of the polarization element to be made up of PVA is excellent, therefore usually use triacetyl cellulose (triacetylcellulose, TAC).After saponification process (ester group being replaced to the hydroxyl as hydrophilic radical) being carried out to triacetyl cellulose with alkali, via water-soluble solid then on the polarization element be made up of the polyvinyl alcohol (PVA) as hydrophilic resin.
Tri acetyl cellulose membrane utilizes solution film casting method to manufacture usually.So-called solution film casting method, refers to the solution that will triacetyl cellulose made to be dissolved in what is called doping (dope) in halogen series solvent equal solvent, and stream casting is the method for making of film forming on the endless belt or drum of the rotation as supporter.After stream casting, a part for solvent is in addition dry on supporter, peel off solidification from supporter and the film that obtains, remaining solvent seasoning is obtained tri acetyl cellulose membrane.
This method must remove at the inner remaining solvent of the film be shaped, and the equipment such as the recovery of the solvent of therefore drying line or evaporation and regenerating unit and manufacturing cost become huge.In addition, because use halogen series solvent, so with regard to environmental problem aspect, exploitation is also needed to replace material and other manufacture methods.On the other hand, it is also proposed the method (such as Japanese Patent Laid-Open 2006-63169 publication, Japanese Patent Laid-Open 2006-306027 publication etc.) utilizing extrusion by melting (melt extrusion method) to manufacture cellulose ester membrane.But, there is following problem: owing to forming surface smoothly, and the sufficient adherence with the polarization element be made up of PVA cannot be obtained in the cellulose ester membrane obtained according to utilizing these methods.
Patent documentation 1: Japanese Patent Laid-Open 2006-63169 publication
Patent documentation 2: Japanese Patent Laid-Open 2006-306027 publication
Summary of the invention
The object of the invention is to; overcome the defect that above-mentioned prior art exists; and provide a kind of implement for the polarization element be made up of polyvinyl alcohol (PVA) easily then the novelty of shape cellulose esters polarization element diaphragm and there is Polarizer and the liquid crystal display cells of this polarization element diaphragm, be very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of polarization element diaphragm that the present invention proposes, it has cellulose esters transparent substrate layer, and
There is the micro concavo-convex shape being formed in described substrate layer inner face,
The alignment diagram surface roughness (Ra) of substrate layer inner face is more than 1 μm less than 10 μm.
The mode that this polarization element diaphragm becomes more than 1 μm less than 10 μm at substrate layer inner face with the surfaceness of this inner face (Ra) has micro concavo-convex shape.Due to this polarization element diaphragm as mentioned above as there is at the whole inner face of substrate layer the micro concavo-convex shape of described size, therefore the surface area of substrate layer inner face obviously increases.Therefore, according to this polarization element diaphragm, because the area of polarization element or adhesion agent layer and substrate layer inner faces contact obviously increases, thus adherence improves.In addition, if inner face as is as mentioned above had the long-pending cellulose esters substrate layer saponification of broad surface with alkali, the hydroxyl as hydrophilic radical so produced in interior face surface increases than usual, also can effectively improve thus with the adherence of the polarization element be made up of polyvinyl alcohol (PVA) and adhesion agent layer.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid polarization element diaphragm; the mean roughness (Rz) at ten places of wherein said substrate layer inner face is preferably more than 2 μm less than 60 μm, and the mean roughness (Rz) at ten places of substrate layer inner face is preferably less than more than 1 15 relative to the roughness ratio (Rz/Ra) of arithmetic average roughness (Ra).By making the mean roughness (Rz) at ten places of substrate layer inner face in described scope, and the surface area of inner face can be expanded further, and improve adherence further.In addition, by the micro concavo-convex shape of substrate layer inner face in roughness ratio (Rz/Ra) mode in described scope, there is fixing roughness on the whole and be roughly formed uniformly, and the surface area of substrate layer inner face can be increased and concavo-convex inequality can be reduced.Therefore, according to this polarization element diaphragm, the homogeneity then with polarization element can be improved, and the bright spot on film can be reduced, the quality of the diaphragm as polarization element can be improved.
Aforesaid polarization element diaphragm, wherein said cellulose esters is preferably cellulose-acetate propionate.The meltbility of cellulose-acetate propionate, to have excellent formability, therefore can easily and form the concaveconvex shape of substrate layer inner face economically.In addition, easily saponification process is carried out to cellulose-acetate propionate, easily and fully can have been given play to the water wettability of substrate layer inner face by saponification.
Aforesaid polarization element diaphragm, wherein this polarization element diaphragm can have lamination at the anti-reflecting layer (such as comprising the anti-reflecting layer being called antiglare layer (anti-glare layer), anti-reflecting layer, low-index layer) of substrate layer exterior side or hard conating.When the polarization element diaphragm with anti-reflecting layer is disposed in the display surface side of liquid crystal display cells, anti-reflection function can be given play to while protection polarization element.In addition, further there is hard conating by polarization element diaphragm, and the defencive function of polarization element can be strengthened.
Aforesaid polarization element diaphragm; wherein this polarization element diaphragm preferably utilizes and extrudes thin slice forming process and formed; that is, make the cellulose esters of molten condition by having the roller die of reversion shape and the bite of other rollers of described substrate layer inner face around, and shape described in transfer printing.If by utilizing this so-called embossing processing of extruding thin slice forming process to form the concaveconvex shape of substrate layer inner face, so can easily and exactly the size of this concaveconvex shape or the surfaceness etc. of concrete shape and substrate layer inner face are set and adjusted.In addition, extrude thin slice forming process and carry out film by utilizing simultaneously and be shaped and be shaped with the concaveconvex shape of substrate layer inner face, and when the film of shaping is reeled, due to the existence of the concaveconvex shape of substrate layer inner face, and intermembranous adhesion can be reduced, therefore can manufacture the film of speciality volume.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to a kind of Polarizer that the present invention proposes; it possesses the polarization element and a pair polarization element diaphragm of lamination in the side, two faces of this polarization element with polyvinyl alcohol (PVA); in Polarizer, be preferably used in this polarization element diaphragm that substrate layer inner face has micro concavo-convex shape polarization element diaphragm as at least a slice.In this Polarizer; by at least one side, face at polarization element; use this polarization element diaphragm with the easy then substrate layer of shape implemented for polyvinyl alcohol (PVA); and adherence, the permanance then of polarization element and this polarization element diaphragm can be improved, but also intensity, the operability of Polarizer can be improved.
The object of the invention to solve the technical problems realizes in addition more by the following technical solutions.According to a kind of liquid crystal display cells that the present invention proposes; its have liquid crystal cells, with a pair Polarizer of lamination in the side, two faces of this liquid crystal cells; in liquid crystal display cells; preferred use has the described Polarizer at substrate layer inner face with the polarization element diaphragm of micro concavo-convex shape, is used as the Polarizer of at least a slice.In this liquid crystal display cells, the adherence of polarization element and polarization element diaphragm, then permanance are high, and intensity, the operability of Polarizer are excellent, and each characteristic that therefore liquid crystal display cells has can play long-term and stably, and reliability improves.
In addition, in the present invention, so-called " inner face " refers to and clamps in the Polarizer of polarization element between a pair polarization element diaphragm, the polarization element side at center, and so-called " outside " refers to the opposition side of the polarization element side at this center.In addition, so-called " exterior side " etc. certain " side, face ", not only refers to the situation of direct lamination in this certain face, and comprises the situation of the lamination via other layers.In addition, " arithmetic average roughness (Ra) " and " mean roughness (Rz) at ten places " is according to JIS B0601-1994, cutoff value λ c be 2.5mm, evaluation length be 12.5mm time value.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme; polarization element diaphragm of the present invention, Polarizer and liquid crystal display cells at least have following advantages and beneficial effect: according to polarization element diaphragm of the present invention; form easy then shape, i.e. the micro concavo-convex shape for the polarization element be made up of polyvinyl alcohol (PVA) at inner face, therefore improved by leaps and bounds with the adherence of the polarization element of the polyvinyl alcohol (PVA) had as hydrophilic resin.In addition, owing to having this concaveconvex shape, and the film extruded in thin slice shaping can be made to realize long size.In addition, because Polarizer has this polarization element diaphragm, and make intensity, the operability raising of this Polarizer.In addition, because liquid crystal display cells has this Polarizer, and desired characteristic can be played long-term and stably.
In sum; the invention relates to a kind of polarization element diaphragm, Polarizer and liquid crystal display cells, its object is to provide a kind of implement for the polarization element be made up of polyvinyl alcohol (PVA) easily then the novelty of shape cellulose esters polarization element diaphragm and there is Polarizer and the liquid crystal display cells of this polarization element diaphragm.This polarization element diaphragm of the present invention, has cellulose esters transparent substrate layer, and has the micro concavo-convex shape being formed in described substrate layer inner face, and the alignment diagram surface roughness (Ra) of substrate layer inner face is more than 1 μm less than 10 μm.The mean roughness (Rz) at ten places of described substrate layer inner face is preferably more than 2 μm less than 60 μm, and the mean roughness (Rz) at ten places of substrate layer inner face is preferably less than more than 1 15 relative to the roughness ratio (Rz/Ra) of arithmetic average roughness (Ra).The present invention has significant progress technically, and has obvious good effect, is really a new and innovative, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the diagrammatic cross-section of the polarization element diaphragm representing an example of the present invention.
Fig. 2 is the diagrammatic cross-section of the Polarizer of the polarization element diaphragm with Fig. 1.
Fig. 3 is the schematic diagram of the device of the Polarizer representing shop drawings 2.
Fig. 4 is the diagrammatic cross-section of the liquid crystal display cells of the Polarizer with Fig. 2.
Fig. 5 is the diagrammatic cross-section of the structure representing the general liquid crystal display cells utilizing conventional art.
1: polarization element diaphragm 2: substrate layer
3: concaveconvex shape 4: Polarizer
5: polarization element 6: adhesion agent layer
7: Polarizer manufacturing installation 8: roller
9: roller 10: solid feed mechanism
11: roller 12: liquid crystal indicator
13: liquid crystal cells 14: transparent dielectric layer
15: liquid crystal layer 16: adhesion agent layer
21: liquid crystal display cells 22: Polarizer
23: polarization element diaphragm 24: polarization element
25: liquid crystal cells 26: transparent dielectric layer
27: liquid crystal layer 28: adhesion agent layer
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect; below in conjunction with accompanying drawing and preferred embodiment; to the polarization element diaphragm proposed according to the present invention, Polarizer and its embodiment of liquid crystal display cells, structure, feature and effect thereof, be described in detail as follows.
The polarization element diaphragm 1 of Fig. 1 has transparent substrate layer 2.
Substrate layer 2 is cellulose esters system.Substrate layer 2 is cellulosic low-grade fatty acid ester system particularly preferably.Lower fatty acid in so-called cellulosic low-grade fatty acid ester, refers to that carbon number is the fatty acid of less than 6, include, for example cellulose acetate, cellulose propionate, cellulose butyrate etc., particularly preferably cellulose-acetate propionate.In addition, as described later, one or more adjuvants can be added in substrate layer 2 except the cellulose esters such as cellulose-acetate propionate.
Because substrate layer 2 is cellulose esters system, therefore utilize saponification process that the ester group on surface is replaced to the hydroxyl as hydrophilic radical, thus easily then on the polarization element be made up of the polyvinyl alcohol (PVA) as hydrophilic resin.Particularly according to cellulose-acetate propionate, available commercial run easily carries out saponification process, and accurately and economically can form the micro concavo-convex shape 3 of substrate layer 2 inner face described later.In addition, cellulose-acetate propionate can utilize because meltbility is excellent and extrudes thin slice forming process and be shaped, and does not therefore need halogenated solvent, also excellent with regard to environment aspect and energy-conservation aspect.
Substrate layer 2 has the micro concavo-convex shape 3 being formed at inner face.The surfaceness of substrate layer 2 inner face caused by this micro concavo-convex shape 3, the lower limit of preferred Ra (arithmetic average roughness) is 1 μm, is preferably 2 μm, is more preferably 3 μm, and preferably the higher limit of Ra is 10 μm, is preferably 8 μm, is more preferably 6 μm, is especially preferably 4 μm, is particularly preferably 3 μm.Because this polarization element diaphragm 1 is the micro concavo-convex shape 3 at the whole inner face of substrate layer 2 with described size, so the surface area of substrate layer 2 inner face obviously increases.Therefore, according to this polarization element diaphragm 1, the area of polarization element or adhesion agent layer and substrate layer 2 inner faces contact can increase, and thus improves with the adherence of polarization element and adhesion agent layer.In addition, if carry out saponification with alkali to the cellulose esters substrate layer 2 that inner face as mentioned above has obviously broad surface area, so can produce a large amount of hydroxyls as hydrophilic radical in interior face surface, therefore in this way, also can effectively improve with the adherence of the polarization element be made up of polyvinyl alcohol (PVA) and adhesion agent layer.In addition, if the surfaceness of substrate layer 2 inner face is less than described scope, so the surface area of inner face can not increase fully, therefore the raising of adherence not obvious.In addition, if the surfaceness of substrate layer 2 inner face exceedes described scope, so through light surface uniformity decline.
In addition, the inner face due to substrate layer 2 has described concaveconvex shape 3, so when making this substrate layer 2 or polarization element diaphragm 1 be shaped, and when reeling with roller, this concaveconvex shape 3 can be utilized to prevent intermembranous contact closely.Therefore, according to this polarization element diaphragm 1, the adhesion after reeling can be prevented and make film realize long size.
The mean roughness (Rz) at preferred ten places of the surfaceness of substrate layer 2 inner face is more than 2 μm less than 60 μm, is preferably more than 2 μm less than 30 μm.By making the surfaceness of substrate layer 2 inner face in described scope, and the surface area of inner face can be expanded further, and the adherence with polarization element and adhesion agent layer can be improved.If the mean roughness (Rz) at ten places of substrate layer 2 inner face exceedes described scope, so can form the position of the very thin thickness of substrate layer 2, therefore the intensity of substrate layer 2 can decline.If the mean roughness (Rz) at ten places of substrate layer 2 inner face is less than described scope, so the surface area of inner face can not increase fully, and can not show the raising effect of adherence.
In addition, the mean roughness (Rz) at ten places of preferred substrates layer 2 inner face is less than more than 1 15 relative to the roughness ratio (Rz/Ra) of arithmetic average roughness (Ra), be preferably less than more than 1.5 15, be more preferably less than more than 2 15.Usual polarization element diaphragm is preferably the few polarization element diaphragm of bright spot.So-called bright spot, refers to orthogonal configuration two panels Polarizer, between these Polarizers, configures cellulose ester membrane, and when observing cellulose ester membrane from the face of a slice Polarizer, the light of light source leaks and visible point.The mean roughness (Rz) at ten places is the parameters of concavo-convex size representing local, if roughness ratio (Rz/Ra) is large, so local exists a large amount of concavo-convex greatly.One of concavo-convex bright spot become on film of this local.Therefore; become the mode of described scope with roughness ratio (Rz/Ra) by the micro concavo-convex shape 3 of substrate layer 2 inner face, entirety is roughly formed uniformly, and can reduce the concavo-convex inequality of inner face; therefore reduce bright spot, and improve the quality as the diaphragm of polarization element.If the roughness ratio (Rz/Ra) of substrate layer 2 inner face exceedes described scope, so owing to can produce because of the minor gap caused by concaveconvex shape 3 between polarization element and substrate layer 2 inner face, and adhesion declines, and adherence declines on the contrary.In addition, if the roughness ratio (Rz/Ra) of substrate layer 2 inner face exceedes described scope, so can form the position of the very thin thickness of substrate layer 2, therefore the intensity of substrate layer 2 declines.
The average thickness of substrate layer 2 is preferably more than 10 μm less than 200 μm, is more preferably more than 20 μm less than 100 μm.It is more than 10 μm by making the thickness of substrate layer 2, and intensity and the rigidity of appropriateness can be obtained, and Absorbable organic halogens and easily carry out film manufacture, on the other hand, by making the thickness of substrate layer 2 be less than 200 μm, and the linear velocity, productivity, controlling etc. when can improve manufacture.
Cellulose esters for substrate layer 2 is raw material with cellulose, manufactured by the acidylate of hydroxyl.In cellulose esters used in the present invention, the degree of substitution for cellulosic hydroxyl is not particularly limited, and can measuring the conjugation of fatty acid on cellulosic hydroxyl, obtaining degree of substitution by calculating.The mensuration of degree of substitution can utilize the method specified in the D-817-91 of ASTM (American society for testing materials) (American Society for TestingMaterial, ASTM) to carry out.
Following formula (A) and (B) is preferably met for cellulose-acetate propionate of the present invention.
2.0≤X+Y≤3.0 (A)
1.2≤X≤2.8 (B)
In formula, X represents the degree of substitution of acetyl group relative to hydroxyl, and Y represents the degree of substitution of propiono relative to cellulosic hydroxyl.So-called " degree of substitution ", refers to the total of the ratio that the hydrogen atom of each hydroxyl of cellulosic 2,3 and 6 is substituted.When all hydroxyls of 2,3 and 6 are 3 by degree of substitution during acyl substituted.
The cellulose-acetate propionate used in the present invention more preferably meets following formula (A ') and (B '), especially preferably meets following formula (A ") and (B ").
2.2≤X+Y≤2.9 (A′)
1.3≤X≤2.7 (B′)
2.4≤X+Y≤2.8 (A″)
1.4≤X≤2.6 (B″)
Meet the cellulose-acetate propionate of described formula, moderately balanced by the water wettability of the hydrophobicity and hydroxyl that make acyl group, can easily shape as membranaceous.These cellulose-acetate propionates can utilize known method to synthesize.
The preferred operating weight average molecular weight Mw/number average molecular weight Mn of the cellulose esters used in the present invention, than the cellulose esters being 1.5 ~ 5.5, is particularly preferably 2.0 ~ 5.0, is more preferably 2.5 ~ 5.0, especially preferably use the cellulose esters of 3.0 ~ 5.0.
The raw cellulose of the cellulose esters used in the present invention can be wood pulp and also can be velveteen, and wood pulp can be conifer and also can be broad leaf tree, is more preferably conifer.With regard to fissility aspect during film forming, preferably use velveteen.The cellulose esters made by these raw materials can suitably mix, or is used alone.
Such as can be derived from the cellulose esters of velveteen: the cellulose esters being derived from wood pulp (conifer): the ratio being derived from the cellulose esters of wood pulp (broad leaf tree) 100: 0: 0,90: 10: 0,85: 15: 0,50: 50: 0,20: 80: 0,10: 90: 0,0: 100: 0,0: 0: 100,80: 10: 10,85: 0: 15,40: 30: 30 is used.
In addition, the cellulose esters that the bright spot when cellulose esters used in the present invention is preferably film forming is few.Think one of the reason of bright spot be in cellulose esters containing unreacted cellulose, remove unreacted cellulose by the cellulose esters of filtering molten, reduce bright spot.In addition, exist and be inclined to as follows: the thickness of film is thinner, and the bright spot number of per unit area is fewer, the content of cellulose esters contained in film is fewer, and bright spot is fewer.
The bright spot of preferred more than the diameter 0.01mm of bright spot is 200/cm
2below, 100/cm is more preferably
2below, so be preferably 50/cm
2below, especially 30/cm is preferably
2below, 10/cm is particularly preferably
2below, most preferably be and there is no bright spot completely.In addition, for the bright spot of 0.005mm ~ below 0.01mm, be also preferably 200/cm
2below, 100/cm is more preferably
2below, so be preferably 50/cm
2below, especially 30/cm is preferably
2below, 10/cm is particularly preferably
2below, most preferably be and there is no bright spot completely.
When removing bright spot foreign matter by filtering, compared with the fused solution filtering independent fused fiber element ester, the removing efficiency that filtration interpolation is mixed with the bright spot foreign matter of the constituent of plastifier is higher, and preferably.Also the constituent being suitably mixed with ultraviolet light absorber, other additives can be filtered.As for filtration, preferably with the viscosity of the fused mass containing cellulose esters for below 10000P filters, be more preferably below 5000P, be especially preferably below 1000P, be particularly preferably below 500P.Filter medium preferably uses the known filter mediums such as fluororesin such as glass fibre, cellulose fibre, filter paper, tetrafluoroethylene resin, particularly preferably uses pottery, metal etc.Filtering precision preferably uses the filter medium of less than 50 μm, is more preferably the filter medium of less than 30 μm, is especially preferably the filter medium of less than 10 μm, particularly preferably uses the filter medium of less than 5 μm.Also can by appropriately combined for these filter mediums and use.Filter medium can use surface type (surface type) also can use degree of depth type (depth type), the more difficult blocking of filter medium of degree of depth type and preferably using.
The cellulose esters of raw material dissolves in a solvent by preferred use at least one times, makes the cellulose esters of solvent seasoning.Be more preferably the cellulose esters that more than at least one by the cellulose esters of raw material and plastifier, ultraviolet light absorber and matting agent together dissolves drying in a solvent.In addition be more preferably and be cooled to the cellulose esters of less than-20 DEG C in the process of dissolving.By adding this cellulose esters, the uniformly dispersed of each additive when becoming molten condition can be improved, and make optical characteristics even, therefore also excellent.Particularly preferably add this cellulose esters and be more than 1 percentage by weight (wt%) of total fiber element ester, be more preferably more than 5wt%, and then be preferably more than 10wt%, especially more than 30wt% is preferably, be particularly preferably more than 50wt%, most preferably be and once all fibres element ester raw material dissolved with solvent.
Polarization element diaphragm 1 of the present invention also can be the film of the macromolecule component be suitably mixed with except cellulose esters.Mixed macromolecule component is preferably the macromolecule component with the excellent compatibility of cellulose esters, and transmissivity when being preferably film forming is more than 80%, is more preferably more than 90%, is especially preferably more than 92%.
The cellulose esters used in the present invention also can containing more than one adjuvant.Adjuvant can mix with cellulose esters in advance, also can in extrusion by melting in the midway of extruder mixing enter.In order to add equably, preferably use the mixing arrangements such as static mixer (static mixer).Adjuvant can be enumerated: plastifier, antioxidant, sour trapping agent, light stabilizer, peroxide decomposer, radical scavenger, metal deactivator (metal deactivator), ultraviolet light absorber, matting agent, dyestuff etc.In addition, as long as the adjuvant for having described function, the unfiled adjuvant in above-mentioned scope also can be used.
Form in the cellulose esters of substrate layer 2 preferably containing plastifier.With regard to improving the viewpoint of the upgrading of the film of engineering properties, imparting flexibility, imparting water absorption resistance, reduction moisture transmitance etc., in substrate layer 2, preferably add well-known compound as plastifier.In addition, adding plastifier and comprise following object: when substrate layer 2 being shaped with extrusion by melting, by adding plastifier, and making the melt temperature of film constituent material lower than the glass transition temperature being used alone cellulose esters; Or the viscosity of viscosity lower than cellulose esters of the film constituent material containing plastifier can be made under identical heating-up temperature.Here, in the present invention, the melt temperature of so-called film constituent material, under referring to the state showing mobility at this material of heating, the temperature of heating material.
When being used alone cellulose esters, if lower than glass transition temperature, so can not show the mobility in order to film forming.But at the temperature of cellulose esters more than glass transition temperature, owing to absorbing heat, module of elasticity or viscosity decline, and show mobility.In order to make the melting of film constituent material, in order to meet described object, and the plastifier preferably added has fusing point lower than the glass transition temperature of cellulose esters or glass transition temperature.
Plastifier include, for example: the phosphate plasticizer such as the adjacent Biphenyl Ester of triphenyl phosphate, tricresyl phosphate, tricresyl phosphate base phenyl ester, octyl diphenyl phosphate, diphenyl phosphate Biphenyl Ester, trioctyl phosphate, tributyl phosphate, tri naphthyl phosphate, tricresyl phosphate (dimethylbenzene) ester, tricresyl phosphate; The phthalic ester system plastifier such as diethyl phthalate, DMEP, repefral, dioctyl phthalate, dibutyl phthalate, phthalic acid two (2-Octyl Nitrite); The ethyl glycolate system plastifier etc. such as glycerol triacetate, glycerin tributyrate, butyl phthalyl acid butyl ester, ethyl phthalyl acetoacetic ester, methyl phthalyl acetoacetic ester.Wherein, phthalic ester system or ethyl glycolate system plastifier are because being difficult to cause cellulose ester hydrolysis preferably.In addition, preferably containing the plastifier that solidifying point is less than 20 DEG C.This plastifier include, for example: tricresyl phosphate, tricresyl phosphate base phenyl ester, tributyl phosphate, diethyl phthalate, repefral, dioctyl phthalate, dibutyl phthalate, phthalic acid two (2-Octyl Nitrite), ethyl phthalyl acetoacetic ester etc.
In addition, in plastifier, particularly preferably use and there is nonvolatile plastifier.So-called non-volatile plasticisers, refers to that the vapor pressure at 200 DEG C is the compound of below 10mmHg, and refers to have extremely low vapor pressure and the compound with the character of low volatile grade.Be preferably below 5mmHg, be more preferably below 1mmHg.Specifically can enumerate non-volatile phosphate, such as, be preferably arlydene two (diaryl phosphate).
With regard to the viewpoint of dimensional stability, the content of above plastifier is preferably 0.1wt% ~ 30wt% relative to cellulose esters, is particularly preferably 0.5wt% ~ 15wt%.
In addition, the plastifier of preferred more to be the solidifying point of contained plastifier be less than 20 DEG C, particularly less than 14 DEG C.Utilize the plastifier that solidifying point is low, and improve the flexibility of cellulose ester membrane, thus improve the processability of film.
Form in the cellulose esters of substrate layer 2 preferably containing antioxidant.Antioxidant include, for example phenol system antioxidant, phosphorous antioxidant, sulphur system antioxidant, heat-resisting processing stabilizers, deoxidant (oxygen scavenger) etc., in these antioxidants, be preferably phenol system antioxidant, particularly alkyl-substituted phenols system antioxidant.By allocating these antioxidants, the reduction such as the transparency, thermotolerance can not be made, can prevent the painted or intensity of the formed body that caused by heat when being shaped or oxidative degradation etc. from declining.These antioxidants can individually use, or combinationally use two or more, the allotment amount of these antioxidants suitably can be selected in the scope not undermining object of the present invention, be preferably 0.001 weight portion ~ 5 weight portion relative to polymkeric substance 100 weight portion of the present invention, be more preferably 0.005 weight portion ~ 1 weight portion.
Form in the cellulose esters of substrate layer 2 and also can add sour trapping agent.Acid trapping agent is preferably containing the sour trapping agent as the epoxy compound of sour trapping agent.This epoxy compound as sour trapping agent is known in this technical field, comprise the diglycidyl ether of various polyglycols, particularly derivative by the oxirane of the polyglycols condensation about 8 moles ~ 40 moles of every 1 mole etc. polyglycols, the diglycidyl ether etc. of glycerine, becket oxide (such as in the past since the compound that always utilizes in vinyl chloride-base polymer constituent, and in the past since the compound that always utilizes in the lump with vinyl chloride-base polymer constituent), epoxidation ether condensation product, bisphenol-A (namely 4, 4 '-dihydroxydiphenyl dimethylmethane) diglycidyl ether, epoxidation unsaturated fatty acid ester, and various epoxidation long-chain fatty acid triglycerides etc. (such as with the epoxidized vegetable oil representated by the constituents such as epoxidised soybean oil and other unsaturated natural oil).
Form in the cellulose esters of substrate layer 2 preferably containing ultraviolet light absorber.With regard to prevent polarization element or display device for ultraviolet deterioration viewpoint with regard to, optimal wavelength is the ultraviolet light absorber that the ultraviolet absorption of below 370nm can be excellent, and with regard to the viewpoint of liquid crystal display, optimal wavelength is the ultraviolet light absorber that the absorption of the visible ray of more than 400nm is few.Include, for example: oxygen base benzophenone based compound, benzotriazole based compound, salicylate based compound, benzophenone based compound, cyanoacrylate based compound, nickel complex salt based compound etc., be preferably benzophenone based compound or painted few benzotriazole based compound.
The concrete example of benzotriazole based compound can be enumerated: 2-(2 '-hydroxyl-5 '-aminomethyl phenyl) benzotriazole, 2-(2 '-hydroxyl-3 ', 5 '-di-tert-butyl-phenyl) benzotriazole, 2-(2 '-hydroxyl-3 '-tert-butyl group-5 '-aminomethyl phenyl) benzotriazole, 2-(2 '-hydroxyl-3 ', 5 '-di-tert-butyl-phenyl)-5-chlorobenzotriazole, 2-(2 '-hydroxyl-3 '-(3 ", 4 " 5 ", 6 "
tetrahydric phthalimide ylmethyl)-5 '-aminomethyl phenyl) benzotriazole, 2, 2-di-2-ethylhexylphosphine oxide (4-(1, 1, 3, 3-tetramethyl butyl)-6-(2H-benzotriazole-2-base) phenol), 2-(2 '-hydroxyl-3 '-tert-butyl group-5 '-aminomethyl phenyl)-5-chlorobenzotriazole, 2-(2H-benzotriazole-2-base)-6-(straight chain and branched dodecyl)-4-methylphenol, the potpourri etc. of 3-[3-tertiary butyl-4-hydroxy-5-(chloro-2H-benzotriazole-2-base) phenyl] octyl propionate and 3-[3-tertiary butyl-4-hydroxy-5-(the chloro-2H-benzotriazole of 5--2-base) phenyl] propionic acid-2-Octyl Nitrite, but be not limited to these compounds.
In addition, commercially available product also can use TINUVIN 109, TINUVIN 171, TINUVIN 360 (being Ciba (Ciba Specialty Chemicals) company to manufacture).
The concrete example of benzophenone based compound can be enumerated: 2; 4-dihydroxy benaophenonel, 2; 2 '-dihydroxy-4-methoxy benzophenone, 2-hydroxyl-4-methoxyl-5-diphenylsulfone ketone, two (2-methoxyl-4-hydroxyl-5-Benzoylbenzene methylmethanes) etc., but be not limited to these compounds.
Ultraviolet light absorber preferably adds 0.1wt% ~ 20wt% relative to cellulose esters, more preferably adds 0.5wt% ~ 10wt%, particularly preferably adds 1wt% ~ 5wt%.These ultraviolet light absorbers also can and with two or more.
The manufacture method of substrate layer 2 is not particularly limited, such as, can utilize the adjuvants such as the slice raw material of known mixed method mixed cellulose ester and plastifier, after making thermoplastic resin composition in advance, manufactures substrate layer 2.This thermoplastic resin composition such as by after carrying out premixed with mixers such as universal mixers (omni mixer), is extruded mixing to obtained potpourri and obtains.At this moment, be not particularly limited for extruding mixing mixing roll, such as, can use the known mixing rolls such as the extruder such as single axle extruding machine, biaxial extruder or pressure kneader.
The method that the film of substrate layer 2 is shaped include, for example the known methods such as solution casting method (solution slip casting), extrusion by melting, press polish method (calendar), compression forming method.In these methods, preferred solution casting method (solution slip casting) or extrusion by melting, particularly preferably extrusion by melting.Extrusion by melting does not use solvent and is shaped, be therefore in environment and energy-conservation in the manufacturing process of excellence.In addition, being shaped because of not using solvent, so residual organic solvent amount contained in cellulose ester membrane after film forming is stable and be less than 0.1wt%, the cellulose membrane with stable delay (retardation) value can being made thus to be shaped.
Solvent for solution casting method (solution slip casting) include, for example: the chlorine such as chloroform, methylene chloride series solvent; The aromatic series series solvents such as the mixed solvent of toluene, dimethylbenzene, benzene and these solvents; The alcohol series solvents such as methyl alcohol, ethanol, isopropyl alcohol, normal butyl alcohol, 2-butanols; Methyl cellosolve, ethyl cellosolve, butyl cellosolve, dimethyl formamide, dimethyl sulfoxide (DMSO), dioxan, cyclohexanone, tetrahydrofuran, acetone, methyl ethyl ketone (methyl ethyl ketone, MEK), ethyl acetate, diethyl ether etc.These solvents only can use one, also can and with two or more.Device in order to carry out solution casting method (solution slip casting) include, for example drum-type casting machine, band casting machine, spin coater etc.
Extrusion by melting can be enumerated: make the cellulose esters of molten condition extrude thin slice forming process, plavini (inflation method) etc. by what to have shape described in the roller die of reversion shape of substrate layer inner face and the bite of other rollers and transfer printing around, with regard to form the easiness of concaveconvex shape 3 at inner face with regard to, preferably extrude thin slice forming process.
When with extrude thin slice forming process carry out film be shaped time, by carrying out with under type: install T mould in the leading section of known single axle extruding machine or biaxial extruder, fused fiber element ester film-like from T mould is extruded, make the cellulose esters of molten condition by having the roller die of reversion shape and the bite of other rollers of substrate layer 2 inner face around, after shape described in transfer printing, the film reeled through being shaped.
The melt temperature extruded in thin slice forming process is preferably 170 DEG C ~ 270 DEG C, is more preferably 175 DEG C ~ 265 DEG C, is preferably 180 DEG C ~ 260 DEG C.In addition, the mode preferably becoming 230 DEG C ~ 260 DEG C with the temperature of the molten resin extruded from T mould etc. adjusts melt temperature.By making melt temperature in described scope, the deterioration of celluosic resin and the deterioration of yellow (yellow index, YI value) can be alleviated.
In addition, the roller die of reversion shape and the surface temperature of other rollers around with substrate layer 2 inner face are preferably 60 DEG C ~ 150 DEG C, are more preferably 70 DEG C ~ 140 DEG C, are especially preferably 80 DEG C ~ 135 DEG C.By making the surface temperature of two rollers in described scope, formability can be improved.
Extrude thin slice forming process according to this, process owing to utilizing so-called embossing and the concaveconvex shape 3 of substrate layer 2 inner face is shaped, therefore can easily and carry out the adjustment of the size of concaveconvex shape 3 or the surfaceness of shape and substrate layer 2 inner face etc. exactly.In addition, extrude thin slice forming process and carry out film by utilizing simultaneously and be shaped and be shaped with the concaveconvex shape 3 of substrate layer 2 inner face, and when winding is when the film of shaping, due to the existence of the concaveconvex shape 3 of substrate layer 2 inner face, and reduce intermembranous adhesion.Therefore, according to the method, the adhesion after can preventing film from reeling, and the film of speciality volume can be manufactured.
In addition, reel when the film of shaping, suitably the temperature of adjustment take up roll, applying extension towards extruding direction, also can become uniaxial extension step thus.In addition, by adding the step extended towards the direction vertical with extruding direction by film, and also can add the steps such as twin shaft successively extends, twin shaft extension simultaneously.
Substrate layer 2 can be non-stretched PTFE film, also can be stretched PTFE film.During extension, can be uniaxial extension film, also can be biaxial stretchable film.When being set to biaxial stretchable film, can be the film that twin shaft simultaneously extends, also can be successively the film that twin shaft extends.When carrying out twin shaft and extending, physical strength improves and film properties improves.
The elongating temperature carried out when extending step preferably carries out near the glass transition temperature of the cellulose esters as film raw material, specifically, preferably carry out at (glass transition temperature-30) DEG C ~ (glass transition temperature+100) DEG C, be more preferably (glass transition temperature-20) DEG C ~ (glass transition temperature+80) DEG C.If elongating temperature is lower than (glass transition temperature-30) DEG C, so sufficient extension ratio cannot be obtained, thus bad.If elongating temperature is higher than (glass transition temperature+100) DEG C, so can causes the flowing of resin (flow) and stable extension cannot be carried out, therefore bad.
The extension ratio defined with area ratio preferably can be set to the scope of 1.1 times ~ 25 times, is more preferably set to the scope of 1.3 times ~ 10 times.If extension ratio is less than 1.1 times, so toughness can not be improved along with extension, thus bad.If extension ratio is greater than 25 times, so cannot confirm the effect only improving extension ratio, and the surfaceness being formed in the concaveconvex shape 3 of inner face declines.
Extension speed (one direction) is preferably 10%/minute ~ 20000%/minute scope, be more preferably 100%/minute ~ 10000%/minute scope.If be slower than 10%/minute, so in order to obtain sufficient extension ratio and spended time, and uprise due to manufacturing cost, and bad.If faster than 20000%/minute, so may cause the fracture etc. of stretched PTFE film, thus bad.In addition, in order to the optical isotropy or mechanical characteristic making substrate layer 2 is stablized, also can the laggard row thermal treatment (annealing) of extension process etc.
The manufacturing process of the roller die (the reversion shape of the concaveconvex shape 3 of substrate layer 2 inner face) on knurling rolls surface, such as, also spray processing by implement jet, wet shotcrete technology, sandblast etc. and form this roller die.Profit can form the roller die of the reversion shape as concaveconvex shape 3 in this way more easily.In above-mentioned, when utilization is sandblasted and formed the reversion shape mould of concaveconvex shape 3, can more uniformly form this roller die.According to the roller die formed like this, the little concaveconvex shape 3 of the value of roughness ratio (Rz/Ra) can be formed at the inner face of substrate layer 2.In addition, when substrate layer 2 is stretched PTFE film, the geomery of roller die is suitably adjusted according to extension ratio.
In addition, this injection processing is preferably carried out repeatedly.Utilize the method to be formed evenly roller die.According to the roller die formed like this, the value of the roughness ratio (Rz/Ra) of substrate layer 2 inner face of polarization element diaphragm 1 can be reduced further.In addition, with regard to spray processing in roller die spray atomic mean grain size with regard to, when non-stretched PTFE film be preferably less than 10 μm, be more preferably 1 μm ~ 5 μm, be especially preferably 2 μm ~ 3 μm.
In addition, except described method, such as, also there is following method etc. in the manufacture method of this polarization element diaphragm 1:
A () be lamination cellulose acetate on the thin slice mould of reversion shape with concaveconvex shape 3, form the method for this polarization element diaphragm 1 by peelling off this thin slice mould;
B () injects the injection molding method of melting cellulose acetate in the mould of reversion shape with concaveconvex shape 3;
C the cellulose acetate becoming thin slice heats by () again, be clamped in and carry out suppressing and the method for transfer printing shape with between described identical mould and sheet metal.
In polarization element diaphragm 1; the surface of the substrate layer 2 of exterior side (not forming the side of micro concavo-convex shape 3) can arbitrarily by various functional layer, the such as anti-reflecting layer such as antiglare layer (anti-glare layer), anti-reflecting layer, antiglare layer, low-index layer, antistatic backing, hard conating (hard resin-layer), optical compensating layer etc. be coated to.Such as by polarization element diaphragm, there is antiglare layer (anti-reflecting layer) further, and outside polarization element during this polarization element diaphragm 1 of lamination, except to except the defencive function of polarization element, also can play anti-dazzle function.In addition, further there is hard conating by polarization element diaphragm, and the defencive function of strengthening to polarization element.
This antiglare layer such as can adopt following technology: utilize embossing processing method to form concaveconvex shape on film surface; Or be coated on film surface by forming in material the masking liquid being mixed into particle at adhesive stroma, make particle dispersion in adhesive stroma, form concaveconvex shape thus.In addition, hard conating such as can use the hard conating formed by active wire hardening resin.The example of this active wire hardening resin can be enumerated: acrylic amine carbamate system resin, polyester acrylate system resin, epoxy acrylate system resin, polyalcohol acrylate system resin, epoxy resin etc.
As mentioned above; according to polarization element diaphragm 1 of the present invention; in order to make with the polarization element containing polyvinyl alcohol (PVA) then become easy; and there is the substrate layer 2 that inner face side has micro concavo-convex shape 3; this cellulose esters utilizes the saponification process of alkali through described later and produce hydroxyl, effectively improves the adherence with the polyvinyl alcohol (PVA) as hydrophilic resin forming polarization element thus.
The Polarizer 4 of Fig. 2 has the structure in the side, two faces of the polarization element 5 be made up of polyvinyl alcohol (PVA) with the polarization element diaphragm 1 of Fig. 1.Each polarization element 5 is engaged by adhesion agent layer 6 with between polarization element diaphragm 1.
Polarization element 5 uses and to be dyeed by polyvinyl alcohol resin film with dichroic substance (such as iodine or dichroic dye) and to carry out the polarization element of uniaxial extension.The degree of polymerization forming the polyvinyl alcohol (PVA) of this polyvinyl alcohol resin film is preferably less than more than 100 5000, is more preferably less than more than 1,400 4000.Polyvinyl alcohol resin film can utilize known method (such as, the solution making resin dissolves in water or organic solvent being carried out the slip casting, casting method etc. that stream casts film) to be shaped.The thickness of polarization element 5 is different according to the object of the LCD of use Polarizer 4 or purposes difference, typically more than 5 μm less than 100 μm.Polarization element 5 otherwise hinder polarisation function and optical transparence, then can containing any composition except polyvinyl alcohol resin and dichroic substance.
The representational manufacture method of polarization element 5 be adopt by by polyvinyl alcohol resin film swelling, dyeing, crosslinked, extend, a series of manufacturing step that the step of washing and drying is formed.In various processes except drying steps, process by polyvinyl alcohol resin film being immersed in the bath for the solution of each step.Swelling, dyeing, crosslinked, extend, the presence or absence of the order of each process of washing and drying, number of times and enforcement can according to object, use material and condition etc. and suitably set.Such as extend process to carry out before dyeing process, also can carry out with swelling process etc. simultaneously.In addition, preferably crosslinking Treatment is carried out in the front and back extending process.
Swelling step in a series of manufacturing step of polarization element 5, is undertaken by being immersed in by polyvinyl alcohol resin film during the process of filling water is bathed.Suitably glycerine or potassium iodide etc. can be added in this process bath.The temperature of the process bath of typically swelling step is 20 DEG C ~ about 60 DEG C, and the dip time in process bath is 0.1 minute ~ about 10 minutes.Staining procedure is undertaken by being immersed in by polyvinyl alcohol resin film in the process bath containing dichroic substance such as iodine.The solvent used in the solution of this process bath uses water usually.Dichroic substance is being that the ratio of 0.1 weight portion ~ 1.0 weight portion is used relative to solvent 100 weight portion.Typically the temperature of the process bath of staining procedure is 20 DEG C ~ about 70 DEG C, and dip time is 1 minute ~ about 20 minutes.
Cross-linking step is by carrying out the polyvinyl alcohol resin film immersion of dyed process in the process bath containing crosslinking chemical.The example of crosslinking chemical can enumerate the boron compounds such as boric acid, glyoxal, glutaraldehyde etc.The solvent used in the solution of this process bath uses water usually.Typically the temperature of the process bath of cross-linking step is 20 DEG C ~ about 70 DEG C, and dip time is 1 second ~ about 15 minutes.Extend step to carry out in either phase.The extension ratio of polyvinyl alcohol resin film is preferably more than 5 times.Extension method such as can adopt wet type extension method.The solution of process bath at this moment preferably with the addition of the solution of the compound of various slaine, iodine, boron or zinc in water or organic solvent.
Water-washing step is undertaken by being immersed in water washing bath by the polyvinyl alcohol resin film implementing various process.Utilize this water-washing step, the unnecessary remnant of polyvinyl alcohol resin film can be washed away.Water washing bath can be pure water, also can be the aqueous solution of iodide (potassium iodide, sodium iodide etc.).The temperature of water washing bath is preferably 10 DEG C ~ 60 DEG C.Typically dip time is 1 second ~ 1 minute.The number of times carrying out washing can be only once, also can be repeatedly.Drying steps such as can adopt natural drying, forced air drying, heat drying.Typically baking temperature is 20 DEG C ~ 80 DEG C, and drying time is 1 minute ~ 10 minutes.By carrying out described each step, polarization element 5 can be manufactured.
Polarization element diaphragm 1 preferably carry out with polarization element 5 then before, carry out saponification by the inner face side (forming the side of concaveconvex shape 3) 3 of alkali at least substrate layer 2.Utilize this saponification; the ester group of cellulose esters is replaced to the hydroxyl as hydrophilic radical; can improve the chemical affinity of polarization element diaphragm 1 and the polarization element 5 formed by the polyvinyl alcohol (PVA) as hydrophilic resin thus, and mutual adherence significantly improves.
Aqueous alkali for saponification process such as can use the aqueous solution etc. of NaOH, potassium hydroxide, calcium hydroxide, lithium hydroxide.The concentration of these metal hydroxides is generally more than 5wt% below 40wt%.In addition, the temperature of saponification process is preferably more than 10 DEG C less than 80 DEG C.When the concentration of metal hydroxides is below 5wt% or when the temperature of saponification process is below 10 DEG C, the time needed for saponification process is elongated, thus bad.Saponification process is undertaken by polarization element diaphragm 1 being immersed in appropriate time in the bath of described aqueous alkali.
The solid used in the adhesion agent layer 6 of the substrate layer 2 of polarization element diaphragm 1 and polarization element 5 are fitted, include, for example the polyethenol series such as polyvinyl alcohol (PVA), polyvinyl butyral solid, or the ethene system latex etc. such as butyl acrylate.Usually these solids are made aqueous solution to use.Consider coating or shelf-stability etc., the solid component concentration in the resin solution of solid is preferably 0.1wt% ~ 15wt%.In addition, the viscosity of the resin solution of solid is such as preferably the scope of 1mPas ~ 50mPas.
The Polarizer manufacturing installation 7 utilizing Fig. 3 to schematically show, fits the polarization element diaphragm 1 through saponification process with the polarization element 5 containing polyvinyl alcohol (PVA).The Polarizer manufacturing installation 7 in order to multilayer film of fitting shown in Fig. 3 has: polarization element 5 is wound into the roller 8 of the polarization element of roll, the roller 9 polarization element diaphragm 1 being wound into the polarization element diaphragm of roll, solid feed mechanism 10 and the roller 11 in order to be pressed via solid with polarization element diaphragm 1 by polarization element 5, to engage.
In Polarizer manufacturing installation 7; by the membranaceous polarization element 5 supplied from roller 8, send towards the direction towards roller 11 with the polarization element diaphragm 1 of the process of saponification supplied from roller 9; appropriate solid is supplied in the mode be clamped between these films; then; carry out pressing with roller 11 and polarization element 5 and polarization element diaphragm 1 are fitted, and obtaining on the one side of polarization element 5 the lamination tectosome of polarization element diaphragm 1.Then, for the face of the polarization element 5 of non-lamination polarization element diaphragm 1 side, also use identical mechanism, lamination polarization element diaphragm 1, obtain Polarizer 4 thus.The thickness of Polarizer 4 typically more than 10 μm less than 100 μm.
As mentioned above; according to the Polarizer 4 with polarization element diaphragm 1 of the present invention; owing to implementing micro concavo-convex shape 3 at the inner face of polarization element diaphragm 1 of the side, two faces being configured at the polarization element be made up of polyvinyl alcohol (PVA); so the adherence of polarization element 5 and adhesion agent layer 6 and the polarization element diaphragm 1 be made up of polyvinyl alcohol (PVA) can be improved and peel off permanance, intensity and the operability of Polarizer 4 can be improved thus.
The liquid crystal display cells 12 of Fig. 4 is made up of following manner: to two faces of liquid crystal cells 13 clamping liquid crystal layer 15 with transparent dielectric layer 14 (such as glass), the Polarizer 4 (be made up of polarization element diaphragm 1, polarization element 5 and adhesion agent layer 6) of the Fig. 2 of the present invention that fits via adhesion agent layer 16.Form the liquid crystal layer 15 of liquid crystal cells 13 and the material of transparent dielectric layer 14 and adhesion agent layer 16, be not particularly limited, known material can be used.In addition, in liquid crystal display cells, the Polarizer 4 (Polarizer of the present invention) of Fig. 2 can be used in of a liquid crystal cells side, face, use other Polarizers of conventional art in another side, face of liquid crystal cells.
According to the liquid crystal display cells 12 with the Polarizer 4 being configured with polarization element diaphragm 1 of the present invention; because polarization element diaphragm 1 is configured as the easy then shape being provided with micro concavo-convex shape 3; so the adherence of polarization element 5 and adhesion agent layer 6 and polarization element diaphragm 1, high to the permanance peeled off, and the intensity of Polarizer 4, operability are excellent.Therefore, each characteristic energy long-time continuous that liquid crystal display cells 12 has and stably being played, thus the reliability of whole machine is uprised.
In addition, polarization element diaphragm of the present invention, Polarizer and liquid crystal display cells are not limited to described example, and such as in Polarizer, the polarization element diaphragm of lamination in one side side also can use existing polarization element diaphragm.By not needing the side, face of strong adherence to use existing polarization element diaphragm, manufacturing cost can be cut down.
[embodiment]
Below, according to embodiment, the present invention is described in detail, but does not illustrate that the present invention is limited by the record of this embodiment.
In addition, in the present embodiment, " arithmetic average roughness (Ra) " and " mean roughness (Rz) at ten places " is according to JIS B0601-1994, setting cutoff value λ c is 2.5mm, evaluation length is 12.5mm, and the contact pin type surface roughness measurement device " Surfcom 470A " using Tokyo Seimitsu Co., Ltd. to manufacture measures.
[embodiment 1]
[preparation of substrate layer resin combination]
Use cellulose-acetate propionate (CAP482-20 that Eastman Chemical company manufactures) 100 weight portions as cellulose esters, use triphenyl phosphate (large eight chemical industrial companies manufacture) 10 weight portions and ethyl phthalyl acetoacetic ester (large eight chemical industrial companies manufacture) 2 weight portions as plastifier, use IRGANOX-1010 (manufacture of BASF Japan company) 0.01 weight portion as antioxidant, use TINUVIN 109 (manufacture of BASF Japan company) 0.5 weight portion, TINUVIN 171 (manufacture of BASF Japan company) 0.5 weight portion, and TINUVIN 360 (manufacture of BASF Japan company) 0.3 weight portion is as ultraviolet light absorber, after using twin shaft mixing extruder to carry out melting mixing at 200 DEG C, be extruded into noodles shape, the potpourri of this one-tenth noodles shape is solidified in water and severing, obtain the particle of resin combination thus.
[formation of polarization element diaphragm]
By described pellet supply to extruder, heating and melting at 250 DEG C.Then; the resin of melting flakiness shape from extruder is extruded, by the bite of the roller die and other rollers with micro concavo-convex shape, and replicated fine concaveconvex shape; then carry out carrying with conveying roller and carry out cooling curing, obtaining the polarization element diaphragm of embodiment 1 thus.In addition, the temperature of the molten resin extruded from extruder is 240 DEG C.In addition, the surface temperature of the roller die and other rollers with micro concavo-convex shape is adjusted to 100 DEG C.The Ra of the polarization element diaphragm inner face obtained is 1.0 μm, Rz is 2.0 μm, average thickness is 80 μm.
[embodiment 2 ~ embodiment 5, comparative example 1 and comparative example 2]
Change respectively and there is the roller die of micro concavo-convex shape and the interval of other rollers, in addition, in the same manner as example 1, obtain Ra and the Rz different embodiment 2 ~ embodiment 5 of difference of inner face and the polarization element diaphragm of comparative example 1 and comparative example 2.The average thickness of these polarization element diaphragms is 80 μm.The value of Ra and Rz of obtained each polarization element diaphragm inner face is shown in table 1.
[characteristic evaluation]
Utilize following methods, each polarization element diaphragm of described middle acquisition is carried out about adherence and the characteristic evaluation peeling off permanance.
[saponification of polarization element diaphragm]
By described each polarization element diaphragm at 60 DEG C, dipping 3 minutes in the sodium hydrate aqueous solution of 2mol/L (about 8wt%), carry out saponification thus.Then, wash 4 minutes, then flood 4 minutes in the aqueous solution of nitric acid of the 0.01mol/L of 30 DEG C, neutralize thus, then wash 4 minutes.After washing, drying 3 minutes at 90 DEG C, then carry out natural drying 1 hour, make the polarization element diaphragm of saponification thus.
[formation of polarization element]
The polyvinyl alcohol film of thickness 200 μm is carried out uniaxial extension (temperature 110 DEG C, extension ratio 5 times), and obtain the film that thickness is 40 μm.This film is flooded 60 seconds in the aqueous solution 100g containing iodine 0.15g and potassium iodide 10g, is then immersed in the aqueous solution of 68 DEG C containing potassium iodide 12g and boric acid 7.5g.Then this film is washed, dry, and obtain polarization element.
[making of laminate]
The polarization element diaphragm of described saponification and polarization element are cut into the size of 18cm × 5cm; via polyvinyl alcohol water solution and solid that solid component concentration is 2wt%; this polarization element diaphragm and polarization element are overlapped; use hand roller (hand roller); while by excessive solid or bubble removing, fit.Utilization adds and is pressed into 2kg/cm
2make-up machine this laminate is processed, then at 80 DEG C, carry out drying, obtain the laminate of polarization element diaphragm and polarization element thus.In this laminating, be by the inner face of the polarization element diaphragm of saponification (imparting the face of micro concavo-convex shape) and described polarization element then.
(1) adherence
With hand, two-layer (polarization element diaphragm and the polarization element) of laminate is peeled off, according to the degree that material damage occurs, assess with following Three Estate.Assessment result is shown in table 1.
Well (A): the stripping between film and polarization element does not occur, and causes material damage.
Bad a little (B): cause a part of material damage, but there is the stripping between film and polarization element.
Bad (C): peel off completely between film and polarization element.
(2) permanance is peeled off
Laminate is placed 500 hours under the condition of 75 DEG C of d, 90%RH, measures the width of the stripping from end.Assessment benchmark is as described below.Assessment result is shown in table 1.
Well (A): be less than 0.5mm
Bad a little (B): more than 0.5mm and be less than 1.5mm
Bad (C): more than 1.5mm
[table 1]
| Ra | Rz | Rz/Ra | Adherence | Peel off permanance | |
| Embodiment 1 | 1.0 | 2.0 | 2.0 | A | A |
| Embodiment 2 | 1.4 | 5.6 | 4.0 | A | A |
| Embodiment 3 | 1.2 | 3.8 | 3.2 | A | A |
| Embodiment 4 | 2.6 | 15.8 | 6.1 | A | A |
| Embodiment 5 | 2.0 | 30.0 | 15.0 | A | A |
| Comparative example 1 | 0.4 | 0.8 | 1.9 | B | B |
| Comparative example 2 | 12.0 | 64.0 | 5.3 | C | C |
According to the result of table 1, the adherence of the Polarizer of known embodiment 1 ~ embodiment 5 is good, and stripping permanance is under strict conditions also excellent.In addition; the polarization element diaphragm of comparative example 1 when film forming, alkali treatment time, Polarizer make time; there is the contiguity with conveying roller etc., if do not implement roller line process (knurling treatment) etc. to film both ends, be so difficult to carry out operation.
As mentioned above; possess with diaphragm the substrate layer that one of them surface has specific micro concavo-convex shape outside polarization element of the present invention; compared with the film formed with by the substrate layer without this shape thus, to the adhesion of polyvinyl alcohol (PVA) and peel off permanance be improved significantly.
[utilizability in industry]
Use the liquid crystal display cells with the Polarizer of polarization element diaphragm of the present invention; reliably to carry out between polarization element diaphragm and polarization element then, therefore the reliability of liquid crystal display cells and the whole e-machine with this liquid crystal display cells improves.Therefore, this liquid crystal display cells can be used for from the small-sized product such as counter or clock, in the various fields of the large-scale product such as meter for car, PC display, TV.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. a polarization element diaphragm, is characterized in that: its there is cellulose esters transparent substrate layer and with polarization element then, and
There is the micro concavo-convex shape in the face of the polarization element side being formed in described substrate layer,
The arithmetic average roughness (Ra) in the face of the polarization element side of described substrate layer is more than 1 μm less than 10 μm, the mean roughness (Rz) at ten places is more than 2 μm less than 60 μm, the mean roughness (Rz) at ten places is less than more than 1 15 relative to the roughness ratio (Rz/Ra) of arithmetic average roughness (Ra)
Described cellulose esters is cellulose-acetate propionate; when X represents that in described cellulose-acetate propionate, acetyl group is relative to the degree of substitution of hydroxyl; Y represents the replacement Du Time of propiono relative to hydroxyl; X+Y is less than more than 23; and X is less than more than 1.2 2.8; this polarization element diaphragm utilizes extrude thin slice forming process and formed; this extrudes thin slice forming process is make the cellulose-acetate propionate of molten condition by having the roller die of reversion shape and the bite of other rollers in the face of the polarization element side of described substrate layer around, and shape described in transfer printing.
2. polarization element diaphragm according to claim 1, is characterized in that: it has lamination at the anti-reflecting layer of the exterior side of described substrate layer or hard conating.
3. a Polarizer, is characterized in that: it possesses the polarization element and a pair polarization element diaphragm of lamination in the side, two sides of this polarization element with polyvinyl alcohol (PVA), and
Use polarization element diaphragm according to claim 1 as the polarization element diaphragm of at least a slice.
4. a liquid crystal display cells, is characterized in that: it has liquid crystal cells and a pair Polarizer of lamination in the side, two sides of this liquid crystal cells, and
Use Polarizer according to claim 3 as the Polarizer of at least a slice.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009117303 | 2009-05-14 | ||
| JP2009-117303 | 2009-05-14 | ||
| JP2010-105920 | 2010-04-30 | ||
| JP2010105920A JP2010286827A (en) | 2009-05-14 | 2010-04-30 | Polarizer protective film, polarizing plate and liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
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| CN101887143A CN101887143A (en) | 2010-11-17 |
| CN101887143B true CN101887143B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010180638.XA Expired - Fee Related CN101887143B (en) | 2009-05-14 | 2010-05-14 | Polarizer protection film, polarizing plate and liquid crystal display element |
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| Country | Link |
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| KR (2) | KR101258549B1 (en) |
| CN (1) | CN101887143B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253433A (en) * | 2011-07-04 | 2011-11-23 | 江阴市通利包装材料有限公司 | Prism sheet optical protective film and preparation method thereof |
| JP6454545B2 (en) * | 2014-12-26 | 2019-01-16 | 日東電工株式会社 | Manufacturing method of polarizing plate |
| TWI581039B (en) * | 2016-06-03 | 2017-05-01 | 住華科技股份有限公司 | Optical film set and anti-adhesion method |
| JP6400875B1 (en) * | 2018-02-14 | 2018-10-03 | 住友化学株式会社 | Laminate |
| WO2020184587A1 (en) * | 2019-03-14 | 2020-09-17 | 株式会社クラレ | Polyvinyl alcohol film, polarizing film, and polarizing plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1769932A (en) * | 2004-10-19 | 2006-05-10 | 日东电工株式会社 | Polarizing plate, method of producing a polarizing plate, and liquid crystal panel, liquid crystal television, and liquid crystal display apparatus all using the same |
| CN1942511A (en) * | 2004-04-16 | 2007-04-04 | 柯尼卡美能达精密光学株式会社 | Cellulose ester film |
| CN101201423A (en) * | 2003-06-25 | 2008-06-18 | 富士胶片株式会社 | Optical compensating sheet, polarizing plate, and liquid crystal display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200510790A (en) * | 1999-04-15 | 2005-03-16 | Konishiroku Photo Ind | Manufacturing method of protective film for polarizing plate |
| JP2000347010A (en) * | 1999-06-09 | 2000-12-15 | Nitto Denko Corp | Optical member and liquid crystal display device |
| KR101242335B1 (en) * | 2005-12-07 | 2013-03-12 | 코니카 미놀타 어드밴스드 레이어즈 인코포레이티드 | Celluose ester film, process for producing the same, polarizing plate and liquid-crystal display unit |
| JP2009025603A (en) * | 2007-07-20 | 2009-02-05 | Konica Minolta Opto Inc | Polarizing plate and method for manufacturing the same, apparatus for manufacturing polarizing plate, and display device |
-
2010
- 2010-05-13 KR KR1020100044861A patent/KR101258549B1/en not_active IP Right Cessation
- 2010-05-14 CN CN201010180638.XA patent/CN101887143B/en not_active Expired - Fee Related
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201423A (en) * | 2003-06-25 | 2008-06-18 | 富士胶片株式会社 | Optical compensating sheet, polarizing plate, and liquid crystal display device |
| CN1942511A (en) * | 2004-04-16 | 2007-04-04 | 柯尼卡美能达精密光学株式会社 | Cellulose ester film |
| CN1769932A (en) * | 2004-10-19 | 2006-05-10 | 日东电工株式会社 | Polarizing plate, method of producing a polarizing plate, and liquid crystal panel, liquid crystal television, and liquid crystal display apparatus all using the same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-209940A 2008.09.11 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120059476A (en) | 2012-06-08 |
| KR20100123630A (en) | 2010-11-24 |
| KR101258553B1 (en) | 2013-05-02 |
| KR101258549B1 (en) | 2013-05-02 |
| CN101887143A (en) | 2010-11-17 |
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