CN107111043B - Polarizing film and its manufacturing method - Google Patents
Polarizing film and its manufacturing method Download PDFInfo
- Publication number
- CN107111043B CN107111043B CN201680005705.XA CN201680005705A CN107111043B CN 107111043 B CN107111043 B CN 107111043B CN 201680005705 A CN201680005705 A CN 201680005705A CN 107111043 B CN107111043 B CN 107111043B
- Authority
- CN
- China
- Prior art keywords
- polarizing film
- film
- cross
- axis direction
- degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 238000004132 cross linking Methods 0.000 claims description 70
- 230000015572 biosynthetic process Effects 0.000 claims description 42
- 230000000295 complement effect Effects 0.000 claims description 26
- 230000008961 swelling Effects 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 15
- 238000004043 dyeing Methods 0.000 claims description 14
- 238000002835 absorbance Methods 0.000 abstract description 20
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000014509 gene expression Effects 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 226
- 230000010287 polarization Effects 0.000 description 40
- 238000000034 method Methods 0.000 description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 24
- 239000007864 aqueous solution Substances 0.000 description 22
- 238000010186 staining Methods 0.000 description 19
- 229920005989 resin Polymers 0.000 description 17
- 239000011347 resin Substances 0.000 description 17
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 16
- 239000011630 iodine Substances 0.000 description 16
- 229910052740 iodine Inorganic materials 0.000 description 16
- 230000001681 protective effect Effects 0.000 description 16
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 12
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 11
- 239000004327 boric acid Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 description 9
- 150000001639 boron compounds Chemical class 0.000 description 9
- 238000005406 washing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 210000004379 membrane Anatomy 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000007605 air drying Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 4
- 229940006461 iodide ion Drugs 0.000 description 4
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 4
- 210000000713 mesentery Anatomy 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920002284 Cellulose triacetate Polymers 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000007127 saponification reaction Methods 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- 206010037211 Psychomotor hyperactivity Diseases 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- QPBYLOWPSRZOFX-UHFFFAOYSA-J tin(iv) iodide Chemical compound I[Sn](I)(I)I QPBYLOWPSRZOFX-UHFFFAOYSA-J 0.000 description 2
- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 1
- CBECDWUDYQOTSW-UHFFFAOYSA-N 2-ethylbut-3-enal Chemical compound CCC(C=C)C=O CBECDWUDYQOTSW-UHFFFAOYSA-N 0.000 description 1
- KUKRLSJNTMLPPK-UHFFFAOYSA-N 4,7,7-trimethylbicyclo[2.2.1]hept-2-ene Chemical group C1CC2(C)C=CC1C2(C)C KUKRLSJNTMLPPK-UHFFFAOYSA-N 0.000 description 1
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 1
- UNMYWSMUMWPJLR-UHFFFAOYSA-L Calcium iodide Chemical compound [Ca+2].[I-].[I-] UNMYWSMUMWPJLR-UHFFFAOYSA-L 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910021612 Silver iodide Inorganic materials 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 241000656145 Thyrsites atun Species 0.000 description 1
- LCJHLOJKAAQLQW-UHFFFAOYSA-N acetic acid;ethane Chemical compound CC.CC(O)=O LCJHLOJKAAQLQW-UHFFFAOYSA-N 0.000 description 1
- BAPJBEWLBFYGME-UHFFFAOYSA-N acrylic acid methyl ester Natural products COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- SGUXGJPBTNFBAD-UHFFFAOYSA-L barium iodide Chemical compound [I-].[I-].[Ba+2] SGUXGJPBTNFBAD-UHFFFAOYSA-L 0.000 description 1
- 229910001638 barium iodide Inorganic materials 0.000 description 1
- 229940075444 barium iodide Drugs 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910001640 calcium iodide Inorganic materials 0.000 description 1
- 229940046413 calcium iodide Drugs 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002508 compound effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920005994 diacetyl cellulose Polymers 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 230000002895 hyperchromatic effect Effects 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007603 infrared drying Methods 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- JTHNLKXLWOXOQK-UHFFFAOYSA-N n-propyl vinyl ketone Natural products CCCC(=O)C=C JTHNLKXLWOXOQK-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229940045105 silver iodide Drugs 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- NLLZTRMHNHVXJJ-UHFFFAOYSA-J titanium tetraiodide Chemical compound I[Ti](I)(I)I NLLZTRMHNHVXJJ-UHFFFAOYSA-J 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000010148 water-pollination Effects 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
- B29D11/00788—Producing optical films
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Ophthalmology & Optometry (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention provides a kind of polarizing film, and the degree of orientation is 0.250 to 0.400, and the convergent force for absorbing axis direction is 3.5N/2mm hereinafter, the degree of orientation is obtained by following mathematical expressions 1.(in formula, AMDAbsorbance for the infrared light polarized in the absorption axis direction of polarizing film, ATDAbsorbance for the infrared light polarized in the transmission axis direction of polarizing film, AlargeFor AMDWith ATDThe absorbance of a high side in the middle, AsmallFor AMDWith ATDThe absorbance of a low side in the middle.)
Description
Technical field
The present invention relates to polarizing film and its manufacturing methods, more specifically, are related to that optical characteristics is excellent and absorption axiss (are drawn
Stretch) convergent force in direction small polarizing film and its manufacturing method.
Background technology
Liquid crystal display device (LCD), electroluminescent (EL) display device, plasm display device (PDP), Flied emission are aobvious
Polarization plates are normally contained in polyethenol series used in the various image display devices of showing device (FED), OLED or the like
Iodine based compound or dichroism polarization material are adsorbed on (polyvinyl alcohol, PVA) film and are allowed to polarize obtained by being orientated
Piece, have polarizing film stack gradually on one side polaroid protective film, polarizing film another side stack gradually polarizing film protection
The multilayered structure of film, the adhesive phase engaged with other components and mold release film.
The polarizing film of polarization plates is constituted in order to be suitable for image display device, provides color reproducibility excellent figure
Picture is substantially required to have both high transmissivity and degree of polarization.In order to realize the requirement, using to polyvinyl alcohol mesentery itself into
Row is modified or substitution has the iodine system polarizer of sublimability and produces polarization using the method for non-sublimability dichroic dye
Piece.
On the other hand, typically, polarizing film is by being drawn with film the polarizing film formation for using macromolecule to manufacture
It stretches, so that interior molecules arrangement is orientated along given direction and has polarization function.Thus, when stretching process is manufacture polarizing film
Indispensable process.
However, such stretching process can become when polarizing film is placed under given environment behind embodies stretching
The reason of convergent force in (absorption axiss) direction, such convergent force for absorbing axis direction become the reason of polarizing film deforms.Thus,
Reduce that absorb the convergent force of axis direction be consideration item important in terms of the improvedd polarizing film of manufacture.
However, so far, being still unaware of while realizing the polarizing film of high-polarization and lower shrinkage power.
The manufacturing method of the small polarizing film of shrinkage stress is disclosed in Japanese Laid-Open Patent the 2010-145866th, however
It can not propose the scheme of satisfactory degree regarding to the issue above.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-145866 bulletins
Invention content
Problem to be solved by the invention
The object of the present invention is to provide small inclined of convergent force that axis direction is absorbed while with excellent degree of polarization
It shakes piece and its manufacturing method.
The method for solving problem
1. a kind of polarizing film, the degree of orientation is 0.250 to 0.400, the convergent force for absorbing axis direction be 3.5N/2mm hereinafter,
The degree of orientation is obtained by following mathematical expressions 1：
(in formula, AMDAbsorbance for the infrared light polarized in the absorption axis direction of polarizing film, ATDTo polarize
The absorbance of the infrared light polarized in the transmission axis direction of piece, AlargeFor AMDWith ATDThe absorbance of a high side in the middle,
AsmallFor AMDWith ATDThe absorbance of a low side in the middle).
2. according to the polarizing film described in above-mentioned 1, the degree of orientation is 0.300 to 0.400.
3. a kind of manufacturing method of polarizing film, the manufacturing method include：The swelling of polarizing film formation film, dyeing, stretching,
Crosslinking, complementary color and drying steps,
The cross-linking step includes：Polarizing film formation film stretching is 2.00 to 3.00 times by the first cross-linking step；And
Second cross-linking step, after first cross-linking step, by polarizing film formation film stretching be 1.00 times hereinafter,
In the complementary color step, with the draw ratio higher than second cross-linking step and it is less than first cross-linking step
Draw ratio draw ratio stretch polarizing film formation film.
4. according to the manufacturing method of the polarizing film described in above-mentioned 3, wherein in second cross-linking step, will polarize
Piece formation film stretching is 0.85 to 1.00 times.
5. according to the manufacturing method of the polarizing film described in above-mentioned 3 or 4, wherein in the complementary color step, by polarizing film
Formation film stretching is 1.01 to 1.25 times.
6. a kind of polarization plates, it includes described in above-mentioned 1 or 2 polarizing film and be engaged in at least one side of the polarizing film
Polaroid protective film.
7. a kind of image display device, it includes the polarization plates described in above-mentioned 6.
Invention effect
The polarizing film of the present invention has the degree of orientation of given range and absorbs the convergent force of axis direction, thus will not reduce
Other physical property and with excellent optical characteristics while absorb axis direction on show small convergent force.
The manufacturing method of the polarizing film of the present invention is drawn in cross-linking step and complementary color step with the draw ratio of specific range
Polarizing film formation film is stretched, it is possible thereby to produce the polarizing film of the present invention.In general, then the degree of orientation is higher for high stretching, because
This needs to improve draw ratio, however draw ratio is higher, then stretches the receipts in (absorption axiss) direction to realize excellent polarization characteristic
Contracting power is also bigger.Thus, the realization of high-orientation and the realization of the convergent force of low absorption axis direction are with shifting
(trade-off) relationship is still unaware of while realizing the convergent force of high-orientation and low absorption axis direction so far
Polarizing film, the manufacturing method of polarizing film especially of the invention has lower shrinkage power on absorbing axis direction, while can be with
Adjust the degree of orientation range, as a result, it is possible to manufacture while with high-polarization absorb axis direction on small
The polarizing film of convergent force.
Specific implementation mode
The present invention relates to a kind of polarizing film, the degree of orientation is 0.250 to 0.400, and the convergent force for absorbing axis direction is 3.5N/
2mm is additionally related to its manufacturing method hereinafter, thus optical characteristics is excellent and to absorb the convergent force of axis direction small.
Hereinafter, the present invention is described in detail.
As previously mentioned, the high-orientation of previous known polarization piece is in shifting with convergent force small in axis direction is absorbed
Relationship, be still unaware of that realize the degree of orientation excellent and absorb the example of the small polarizing film of the convergent force of axis direction.
However, present inventor etc. pass through the manufacturing method for the polarizing film that can adjust the degree of orientation, produce simultaneously
Meet high-orientation and absorbs the polarizing film of small convergent force in axis direction.In addition, in specific range adjust the degree of orientation and
In the case of the convergent force for absorbing axis direction, although can obtain degree of polarization does not have a reduction and absorbs the convergent force of axis direction very yet
Small polarizing film.
The degree of orientation of the polarizing film of the present invention is 0.250 to 0.400, can also be preferably 0.300 to 0.400.If taken
It is less than 0.250 to degree, then degree of polarization reduces, and if it is greater than 0.400, then the convergent force for absorbing axis direction increases and has polarizing film
Warpage the problem of becoming larger.
It, can be by by the stretching in the first cross-linking step in order to which the degree of orientation is adjusted to above-mentioned range in the present invention
Than control 2.00 to 3.00 times, will always add up draw ratio and control to adjust at 5.0 times or more.
The degree of orientation of the present invention can be by the infrared light that is polarized in the absorption axis direction of polarizing film (directions MD)
(IR) difference of the absorbance of absorbance and the infrared light polarized in the transmission axis direction (directions TD) of polarizing film is come
It arrives.It obtains shown in the specific relational expression mathematical expression 1 described as follows of the specific degree of orientation.
(in formula, AMDAbsorbance for the infrared light polarized in the absorption axis direction of polarizing film (directions MD), ATD
Absorbance for the infrared light polarized in the transmission axis direction of polarizing film (directions TD), AlargeFor AMDWith ATDIt is high in the middle
A side absorbance, AsmallFor AMDWith ATDThe absorbance of a low side in the middle).
The absorbance of infrared light can for example be measured using Fourier transform infrared spectrophotometer (FT-IR).It is infrared
The wave number of light can for example be set as 1290cm- 1。
The polarizing film of the present invention has low convergent force on absorbing axis direction, and absorbing the convergent force of axis direction can be
3.5N/2mm following.It is that 3.5N/2mm is below in the convergent force for absorbing axis direction, polarizing film can be effectively prevented
Deformation.The lower the convergent force for absorbing axis direction the better, therefore its lower limit is not particularly limited, for example, can be 2N/2mm with
Upper or 1N/2mm or more or 0.1N/2mm or more.In the present invention, in order to which the convergent force of the absorption axis direction of polarizing film is adjusted
For above-mentioned range, can by by the draw ratio control of the first cross-linking step at 2.00 to 3.00 times, by the second cross-linking step
Draw ratio control and adjust at 1.00 times or less.
The thickness of the polarizing film of the present invention can be 5~30 μm, preferably 10~28 μm, more preferably 15~26 μm.Such as
The thickness of fruit polarizing film is above range, then can take into account lower shrinkage power and the operability in the absorption axis direction of polarizing film.
In addition, the present invention provides the manufacturing method of polarizing film above-mentioned.
The manufacturing method of the polarizing film of the present invention includes the swelling of polarizing film formation film, dyeing, stretching, crosslinking, complementary color
And drying steps, the cross-linking step include：Polarizing film formation film stretching is 2.00 to 3.00 times by the first cross-linking step；
And second cross-linking step polarizing film formation film stretching is made to answer for 1.00 times or less after first cross-linking step
Power is alleviated, and in the complementary color step, with the draw ratio higher than second cross-linking step and is less than first cross-linking step
Draw ratio draw ratio stretch polarizing film formation film.Pass through the draw ratio of cross-linking step as described above and complementary color step
It adjusts the degree of orientation that can adjust polarizing film and absorbs the convergent force of axis direction, realize high-polarization and small absorption axis direction
Convergent force.
If carrying out more specific description to the manufacturing method of the polarizing film of the present invention, as follows.
As long as the polymeric membrane used in manufacture of the polarizing film formation film polarization plates for manufacturing polarizing film, then may be used
With without particular limitation using the film well known in the art that can utilize dichroic substance (such as iodine) dyeing, such as can be with
Using polyvinyl alcohol film, by partly-hydrolysed polyvinyl alcohol film；Polyethylene terephthalate film, ethane-acetic acid ethyenyl
Ester copolymer film, ethylene vinyl alcohol copolymer film, cellulose membrane, their hydrophily by partly-hydrolysed film or the like
Polymeric membrane；Or the polyvinyl alcohol mesentery Jing Guo dehydration, polyvinyl chloride mesentery by taking off HCl treatment or the like is more
Alkene alignment films；Deng.In them, from the excellent effect for the uniformity for not only strengthening degree of polarization in face, but also to the dyeing of iodine
The excellent this point consideration of compatibility, preferably polyvinyl alcohol mesentery.
The present invention polarizing film manufacturing method may include swelling step, staining procedure, cross-linking step, complementary color step,
Stretching step, water-washing step and drying steps can classify according to drawing process.For example, dry type stretching side can be enumerated
Method, wet tensile method or the mixing drawing process etc. for being mixed with 2 kinds of drawing process.Make below in wet tensile method
As an example of come illustrate the present invention polarizing film manufacturing method, however it's not limited to that.
The remaining step removed in above-mentioned steps other than drying steps can be respectively by polarizing film formation film immersion
It is carried out in the state of in the thermostatic water bath (bath) being full of with the solution selected from one or more of various solution.
＜ swelling steps ＞
Swelling step is following step, that is, is impregnated in use before being dyed with film to non-stretched polarizing film formation
In the instinct swelling slot of swelling aqueous solution, removal is piled up in dust or anti-blocking agent on the surface of polarizing film formation film
Etc impurity, make polarizing film formation membrane swelling, for improving draw efficiency, prevent dyeing inhomogeneities, improve polarizing film
Physical property.
As swelling aqueous solution, swelling aqueous solution well known in the art, example can be used without particular limitation
Water (pure water, deionized water) can such as be used alone, in the case where adding a small amount of glycerine or potassium iodide thereto, not only
The swelling of polymeric membrane may be implemented, while processability can also be improved.Contain preferably with respect to glycerine for 100 weight % of water
Amount is 5 weight % hereinafter, the content of potassium iodide is 10 weight % or less.
The temperature of swelling slot is not particularly limited, and can be 20 to 45 DEG C, such as can be 25 to 40 DEG C.
The execution time (swelling slot dip time) of swelling step can use known in the field without particular limitation
The execution time, such as can be 180 seconds hereinafter, preferably 90 seconds or less.It, can in the case where dip time is above range
To inhibit swelling exceedingly to reach saturation state, the fracture as caused by the softening of polarizing film formation film is prevented, in staining procedure
The absorption of middle iodine becomes uniform, and degree of polarization can be improved.
Stretching step can be carried out together with swelling step not limit at this point, draw ratio can be about 1.1 to 3.5 times
System, preferably 1.5 to 3.0 times.If the draw ratio is less than 1.1 times, it is likely that fold is generated, in the feelings more than 3.5 times
Under condition, initial optical characteristics may become fragile.
＜ staining procedures ＞
Staining procedure is to make polarizing film formation with film immersion in the dyeing aqueous solution containing dichroic substance, such as iodine
In instinct staining trough, the step of so that polarizing film formation film is adsorbed iodine.
Dyeing aqueous solution can use dyeing aqueous solution well known in the art without particular limitation, can contain
Water, water-miscible organic solvent or their mixed solvent and iodine.The content of iodine in dyeing aqueous solution can be 0.4 to
400mmol/L, however it's not limited to that, preferably 0.8 to 275mmol/L, most preferably 1 to 200mmol/L.
In order to improve staining efficiency, dyeing can also be used as dissolving adjuvant with aqueous solution and also contain iodide.Make
For iodide, iodide well known in the art can be used without limitation, such as can include selected from potassium iodide, iodate
It is at least one kind of in lithium, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide,
In them, from the solubility relative to water it is big from the aspect of preferred potassium iodide.The content of iodide is relative to 100 weight of water
It can be 0.01 to 10 weight % to measure %, however there is no limit preferably 0.1 to 5 weight %.
In addition, in order to make the content of the iodo-complexes in polarizing film formation film increase, can into staining trough relative to
100 weight % of water adds boric acid with 0.3 to 5 weight %, however it's not limited to that.It is less than 0.3 weight in the boric acid of staining trough
In the case of measuring %, it is possible to for PVA-I3Complex compound and PVA-I5The no effect of increase of complex compound content, is being dyed
In the case that the boric acid of slot is the concentration higher than 5 weight %, the danger of film fracture is possible to get higher.
The temperature of staining trough can be 5 to 42 DEG C, however it's not limited to that, preferably 10 to 35 DEG C.In addition, staining trough
The dip time of interior polarizing film formation film is not particularly limited, and can be 1 to 20 minute, preferably 2 to 10 minutes.
In the present invention, stretching step can be carried out together with staining procedure, at this point, draw ratio can be 1.01 to 2.0 times,
However it's not limited to that, preferably 1.1 to 1.8 times.
In addition, the accumulative draw ratio before the staining procedure including the swelling and the staining procedure can be with
It is 1.2 to 4.0 times.If the accumulative draw ratio is less than 1.2 times, it is likely that it generates the fold of film and generates bad order,
More than 4.0 times, initial optical characteristics may become fragile.
＜ cross-linking steps ＞
Cross-linking step is following step, that is, in order not to make the dyeability of the iodine molecule physically adsorbed because of external environment
And reduce, make through hyperchromatic polarizing film formation film immersion in crosslinking aqueous solution, adsorbed iodine molecule is made to fix.
In the case where the cross-linking reaction of the iodine as dichroic dye is insufficient, iodine molecule can take off because of hygrothermal environment
From, thus require sufficient cross-linking reaction.In addition, in order to make the iodine point between the molecule and molecule of polarizing film formation film
Son is orientated, and is improved optical characteristics, can be stretched with maximum draw ratio in cross-linking step.
The cross-linking step of the manufacturing method of the polarizing film of the present invention includes the first cross-linking step and the second cross-linking step, described
1 or more step in first and second cross-linking step can use the crosslinking aqueous solution containing organic boron compound.Thus
The optical characteristics of polarizing film and the durability of color can be improved.
The crosslinking aqueous solution can use crosslinking aqueous solution well known in the art without particular limitation, such as can
Can also also include that can be mutually dissolved together with water comprising the water and the boron compounds such as boric acid or Boratex as solvent
Organic solvent and iodide.
Boron compound assigns short cross-bond and rigidity to polarizing film, and inhibition generates fold in process in film, thus
The operability of film can be improved, the iodine that can play the role of being formed polarizing film is orientated.
The content of the boron compound can use content well known in the art, such as can be relative to 100 weight of water
Amount % is 1 to 10 weight %, preferably 2 to 6 weight %.In the case where its content is less than 1 weight %, the crosslinking of boron compound
Effect can reduce and be difficult to assign rigidity to polarizing film, and more than 10 weight %, the crosslinking of inorganic system's crosslinking agent is anti-
It should be by overactivity, it is difficult to the cross-linking reaction of organic system crosslinking agent be effectively performed.
It, can be in order to keep the uniformity of the degree of polarization in the face of polarizing film, in addition, being colored in order to prevent in this step
Iodine desorption and use iodide.The iodide can be object identical with iodide used in the staining procedure
Matter, content can be 0.05 to 15 weight % relative to 100 weight % of water, and there is no limit preferably 0.5 to 14 weight %.
If its content is less than 0.05 weight %, the iodide ion in film is detached from and is likely to increase the transmissivity of polarizing film, more than
In the case of 15 weight %, the iodide ion in aqueous solution may penetrate into film and the transmissivity of polarizing film is made to reduce.
In the present invention, the temperature for being crosslinked slot can be 20 to 70 DEG C, however it's not limited to that.It is inclined in the crosslinking slot
The dip time of piece formation film of shaking can be 1 second to 15 minutes, however it's not limited to that, preferably 5 seconds to 10 minutes.
The cross-linking step of the present invention includes first and second cross-linking step, is carried out at the same time stretching step.
The draw ratio of first cross-linking step is 2.00 to 3.00 times, preferably 2.20 to 2.80 times.The of the present invention
One cross-linking step improves the mechanical properties of polarizing film with high draw ratio stretching polarizing film formation film, prevents subsequent second
Polarizing film formation is broken with film in cross-linking step.Be not in make if the draw ratio of the first cross-linking step is less than 2.00 times
For the degree of orientation of target, therefore mechanical properties are unable to ensure, if it is greater than 3.00 times, then absorbing the convergent force of axis direction may increase
Add.
In addition, the draw ratio of the second cross-linking step be 1.00 times hereinafter, preferably 0.80 to 1.00 times, more preferably 0.85
Again to 1.00 times.The step of the second cross-linking step of the present invention is the stress relief for making to generate in the first cross-linking step, is to prevent
The fracture of polarizing film formation film and make absorption axis direction convergent force reduce the step of.If the draw ratio of the second cross-linking step
The problem of more than 1.00 times, then will produce the fracture of film, having the convergent force increase for absorbing axis direction.
In addition, the accumulative draw ratio of first and second cross-linking step can be 1.5 to 3.0 times, preferably 1.98 to
2.8 again.If the accumulative draw ratio is less than 1.5 times, the orientation effect of polarizing film formation film is possible to become inadequate,
More than 3.0 times, the stress of stretching increases and makes the convergent force of absorption axis direction that may increase.
＜ complementary color steps ＞
Complementary color step be make the polarizing film formation film for being physically adsorbed with iodo-complexes between molecule and molecule
Iodo-complexes be orientated close to boric acid crosslinking and make the stabilized step of iodo-complexes.In addition, by complementary color step, it can be right
The polarizing film formation that the dyeing of iodo-complexes in the cross-linking step is insufficient corrects color with film.
The complementary color of the complementary color step uses aqueous solution to contain the boron compound such as the water and boric acid as solvent, can also
Also contain the organic solvent and iodide that can be mutually dissolved together with water.
In the present invention, boron compound assigns short cross-bond and rigidity to polarizing film, and inhibition generates in process in film
Fold, it is possible thereby to improve the operability of film, the iodine that can play the role of being formed polarizing film is orientated.
The content of the boron compound can be 1 to 10 weight % relative to 100 weight % of water, however be not limited to
This, preferably 2 to 6 weight %.In the case where its content is less than 1 weight %, the cross-linking effect of boron compound can be reduced and difficult
To assign rigidity to polarizing film, more than 10 weight %, the cross-linking reaction of inorganic system's crosslinking agent is by overactivity, hardly possible
The cross-linking reaction of organic system crosslinking agent is effectively performed.
It, can be in order to keep the uniformity of the degree of polarization in the face of polarizing film, in addition, being colored in order to prevent in this step
Iodine desorption and use iodide.The iodide can be object identical with iodide used in the staining procedure
Matter, content can be 0.05 to 15 weight % relative to 100 weight % of water, however it's not limited to that, preferably 0.5 to 11
Weight %.If its content is less than 0.05 weight %, the iodide ion in film is detached from and is likely to increase the transmissivity of polarizing film,
More than 15 weight %, the iodide ion in aqueous solution may penetrate into film and the transmissivity of polarizing film is made to reduce.
In the present invention, the temperature of complementary color slot can be 20 to 70 DEG C.When the dipping of the polarizing film formation film in complementary color slot
Between can be 1 second to 15 minutes, however it's not limited to that, preferably 5 seconds to 10 minutes.
The complementary color step of the present invention is simultaneously carried out with stretching step, is higher than at this point, the draw ratio of complementary color step has
The draw ratio of second cross-linking step and less than first cross-linking step draw ratio draw ratio.The complementary color step of the present invention
Suddenly polarizing film formation film is stretched with relatively high draw ratio, thus improves the same of optical characteristics in realization high-orientation
When, small convergent force can also be maintained on absorbing axis direction.
The more specific example of draw ratio as complementary color step, can be 1.01 to 1.25 times, preferably 1.05 to
1.20 again.The effect of complementary color step above-mentioned can be excellently embodied in the range of the draw ratio.If draw ratio is small
In 1.01 times, then the degree of orientation of the stabilization effect of iodo-complexes and polarizing film formation film is likely to decrease, more than 1.25
In the case of times, the fracture of film can be generated because of excessive stretching, production efficiency may be decreased.
＜ stretching steps ＞
In the present invention, stretching step can be carried out simultaneously with cross-linking step and complementary color step as previously described, can also be with
Other steps are carried out at the same time, and are also used as other step and are additionally carried out.
Total accumulative draw ratio of manufacturing method according to the invention, polarizing film is preferably 5.0 times or more, such as is preferably
5.0 to 7.0 times, more preferably 5.3 to 6.0 times.
It is so-called " accumulative draw ratio " in this specification, refer to the value of the product of the draw ratio of each step.
＜ water-washing steps ＞
The manufacturing method of polarizing film of the present invention can also include water-washing step as needed, that is, make to finish to be crosslinked and
The polarizing film formation film immersion of stretching removes the step before water-washing step in being washed with water in the instinct rinsing bowl of aqueous solution
The unwanted residue of boric acid on polarizing film formation film etc is attached in rapid.
In the present invention, washing aqueous solution can use well known in the art wash with water-soluble without particular limitation
Liquid, such as can be water, iodide can also be also added thereto, however are not limited to them.
In the present invention, the temperature of rinsing bowl can be 10 to 60 DEG C, however it's not limited to that, preferably 15 to 40 DEG C.
The water-washing step can be omitted, can also be in the water-washing step of the staining procedure or the cross-linking step etc
It is carried out at the end of before the step of is each.Furthermore it is possible to repeat 1 time or more, number of repetition is not particularly limited.
＜ drying steps ＞
In the manufacturing method of the present invention, drying steps are the steps for making the polarizing film formation film by washing dry, and are
Orientation, the acquisition optical characteristics that the iodine molecule being colored is further increased using dry caused contracting (neck-in) are excellent
The step of polarizing film.Moreover, so-called contracting, refers to that the width of film narrows.
As drying means, can without limitation and with drying means well known in the art, can be used for example from
Right drying, heated-air drying, be air-dried, heat drying, far infrared drying, the methods of microwave drying, it is most recently newly to use
So that the water in film is activated and is allowed to dry microwave drying, usually mainly uses heated-air drying.
The execution temperature of heated-air drying is not particularly limited, however the deterioration of polarizing film in order to prevent, preferably compared with low temperature
Degree is lower to carry out, such as can be 20 to 90 DEG C, and preferably 85 DEG C hereinafter, more preferably 80 DEG C or less.
The execution time of the heated-air drying is not particularly limited, such as can carry out 1 to 10 minute.
The polarizing film of the present invention can engage polaroid protective film at least one side and be provided as polarization plates.
As long as the type transparency of the protective film, mechanical strength, thermal stability, water preventing ability, isotropism etc. are excellent
Film, there is no particular limitation, if enumerating specific example, can enumerate by polyethylene terephthalate, it is poly- between
The polyester based resins such as ethylene terephthalate, polybutylene terephthalate (PBT)；Diacetyl cellulose, triacetyl cellulose etc.
Cellulose-based resin；Polycarbonate-based resin；The polyacrylate such as poly- (methyl) methyl acrylate, poly- (methyl) ethyl acrylate
It is resin；The phenylethylene resin series such as polystyrene, acrylonitritrile-styrene resin；Polyethylene, has ring system or drop at polypropylene
The polyolefin-based resins such as polyolefin, the ethylene propylene copolymer of bornylene structure；The polyamide-based tree such as nylon, aromatic polyamide
Fat；Imide series resin；Polyether sulfone system resin；Sulfone system resin；Polyether-ketone system resin；Polyphenylene sulfide system resin；Ethenol system tree
Fat；Vinylidene chloride resin；Vinyl butyral system resin；Aromatic ester system resin；Polyformaldehyde system resin；Epoxy system resin etc. it
The film that the thermoplastic resin of class is constituted, the film that the blend by the thermoplastic resin can also be used to constitute.Alternatively, it is also possible to
Using including the thermosetting resins such as (methyl) acrylic acid series, carbamate system, epoxy, silicone-based or ultraviolet hardening tree
The film of fat.In them, if it is considered that polarization characteristic or durability, then particularly preferably utilize the sapond surfaces such as alkali by having
Cellulose-based resin constitute film.In addition, protective film can also be the film for the function of having both following optical layers.
The structure of the polarization plates is not particularly limited, and can be laminated on polarizing film and disclosure satisfy that required optics is special
Various optical layers of property.For example, it may be having the protection that at least one side in polarizing film is laminated with protection polarizing film
The structure of film；Be laminated in at least one side of polarizing film or protective film hard conating, anti-reflection layer, anti adhering layer, barrier layer,
The structure of the surface-treated layers such as antiglare layer；The aligned liquid-crystal at compensation visual angle is laminated in at least one side of polarizing film or protective film
The polarization plates of the structure of layer or other functional membranes.Alternatively, it is also possible to be when will form various image display devices it is used inclined
Shake the optical film of light conversion device etc, reflector, half-transmitting reflector, include 1/2 wavelength plate or 1/4 wavelength plate equiwavelength's plate
One or more of the phase plate of (including λ plates), compensation film for angular field of view, brightness enhancement film are as structure obtained by optics layer stackup.More
For body, preferably following polarization plates etc., that is, be the structure for being laminated with protective film on one side in polarizing film and be laminated
The reflection type polarizer or Semitransmissive polarization plates of reflector or half-transmitting reflector are laminated on protective film；It is laminated with phase difference
The ellipse or circular polarization plate of plate；It is laminated with the wide viewing angle polarization plates of viewing angle compensating layers or compensation film for angular field of view；Or it is laminated with increasing
The polarization plates etc. of bright film.
The engagement of polarizing film and polaroid protective film can also be carried out using adhesive composite.Bonding agent group is used
Closing the engagement of the polarizing film and protective film of object can be carried out using suitable method, for example, utilizing the tape casting, Meyer
Rod coating method, gravure coating process, die coating method, dip coating, spray-on process etc. are coated in the bonding plane of polarizing coating and/or protective film and are bonded
Agent composition and the method for making the two be overlapped.So-called the tape casting is made as the polarizing film or protective film for being applied object along big
Cause vertical direction, general horizontal direction, or both between inclined direction movement while to the combination of its surface coating adhesive
The method of object.
After coating adhesive composition, polarizing film is clamped with protective film using niproll and is engaged with.
In addition, to improve cementability, plasma can also be appropriately carried out to the surface of polarizing film and/or protective film
The surface treatments such as processing, sided corona treatment, ultraviolet treatment with irradiation, flame treatment, saponification process.As saponification process, Ke Yiju
Go out to be impregnated in the method in the aqueous solutions of the alkali such as sodium hydroxide, potassium hydroxide.
Implement to be dried after by polarizing film and polaroid protective film stacking.Be dried is, for example, by spraying hot wind
It carries out, temperature at this time can properly select in the range of 50 to 100 degree.Drying time is usually 30 to 1000 seconds.
The polarization plates of the present invention not only can be adapted for common liquid crystal display device, can be applicable to organic electroluminescence hair
The various image display devices such as electro-optical display device (OLED), plasm display device, field emission display device.
Hereinafter, in order to contribute to the understanding of the present invention, preferred embodiment is provided, however these embodiments only example
Show the example of the present invention, and not limit the range of additional technical solution, to those skilled in the art it is clear that
Embodiment can be made various changes and be corrected in the range of scope of the invention and technological thought, these changes and amendment
Certainly the range of additional technical solution is also belonged to.
1 ＞ of ＜ embodiments
By saponification degree be 99.9% or more transparent non-stretched polyvinyl alcohol film (PE60, KURARAY company) 25
DEG C water (deionized water) in dipping 20 seconds 1 minute and be allowed to after being swollen (swelling step), containing iodine 1.25mM/L and opposite
30 DEG C of the dyeing containing 1.25 weight % of potassium iodide, 0.3 weight % of boric acid for 100 weight % of water is impregnated in aqueous solution
30 seconds 2 minutes and dyed (staining procedure).At this point, in swelling and staining procedure, respectively with about 1.7184 times, about
1.5214 times of draw ratio stretches, and is stretched in such a way that the accumulative draw ratio before making staining trough is 2.614 times.Then,
For 100 weight % of water containing 13.9 weight % of potassium iodide, 3 weight % of boric acid 56 DEG C of crosslinking aqueous solution in
While impregnating 26 seconds and be allowed to be crosslinked (the first cross-linking step), stretched with 2.36 times of draw ratio.Thereafter, relative to water
For 100 weight % containing 13.9 weight % of potassium iodide, 3 weight % of boric acid 56 DEG C of crosslinking aqueous solution in impregnate 20 seconds and
While being allowed to be crosslinked (the second cross-linking step), stretched with 0.90 times of draw ratio.
Then, in 40 DEG C of the complementary color containing 5 weight % of potassium iodide, 2 weight % of boric acid for 100 weight % of water
With while dipping 10 seconds in aqueous solution (complementary color step), it is stretched as 1.08 times.
At this time so that swelling, dyeing, crosslinking and complementary color step total accumulative draw ratio be 6 times.It is right after crosslinking
Polyvinyl alcohol film is washed (water-washing step) with deionized water, then in 80 DEG C of baking oven dry 5 minutes (drying steps)
And produce the polarizing film of transmissivity 42.5%.The thickness of polarizing film is 23 μm.
Triacetyl cellulose (TAC) film is laminated on the two sides of manufactured polarizing film and produces polarization plates.
1 to 6 ＞ of ＜ embodiments 2 to 10 and comparative example
It is shown described in table 1 described as follows to adjust draw ratio, in addition to this, utilize method system same as Example 1
Produce polarization plates.
[table 1]
＜ test examples ＞
The physical property that the polarizing film manufactured in the above embodiments and comparative example is measured using following methods, by its result table
It is shown in following tables 2.
1. optical characteristics of ＜ (degree of polarization) ＞
After manufactured polarizing film is cut into the size of 4cm × 4cm, using ultraviolet-visible spectrometer (V-7100,
JASCO corporations) determine transmissivity.Degree of polarization is defined by following mathematical expressions 2 at this time.
[mathematical expression 2]
Degree of polarization (P)=[(T1- T2)/(T1+T2)]1/2
(in formula, T1It is the parallel transmission obtained when configuring a pair of of polarizing film with the parallel state of absorption axiss, T2Being will
The orthogonal transmission that a pair of of polarizing film obtains when being configured with the orthogonal state of absorption axiss).
2. degree of orientation ＞ of ＜
After manufactured polarizing film is cut into the size of 4cm × 4cm, polarization ATR devices (VeeMAXIII, PIKE are used
Company, incidence angle：45 °) so that IR light beams is polarized, so as to (be inhaled by the IR light beams of polarization and the directions MD of polarizing film sample
Receive axis direction) parallel mode measures absorbance (A using FT-IRMD) (Nicolet Continuum XL, Thermo companies).
Then, so as to utilize FT-IR by the IR light beams of the polarization mode parallel with the directions TD (the transmission axis direction) of polarizing film sample
Measure absorbance (ATD)。
Determine the 1290cm for the difference that absorbance is shown on the directions MD and TD- 1Absorbance.
The absorbance measured is substituted into the mathematical expression 1 and obtains the degree of orientation.
3. convergent force ＞ of ＜
Herein, the convergent force of the absorption axis direction of every 2mm width of the transmission axis direction of polarizing film is determined.By embodiment
And it after the polarizing film manufactured in comparative example is cut into the size of 3.0cm (absorbing axis direction) × 2mm (transmission axis direction), utilizes
DMA Q800 (Dynamic mechanical analyzer, TA companies) determine absorption axiss direction when being stood 4 hours at 80 DEG C
Convergent force.At this point, in order to which polarizing film is maintained flat state before the assay, apply in the thickness direction of polarizing film minimum
The load of limit and be measured.
[table 2]
| Classification | Degree of polarization (%) | The degree of orientation | Convergent force (N/2mm) |
| Embodiment 1 | 99.996 | 0.320 | 2.90 |
| Embodiment 2 | 99.993 | 0.300 | 2.70 |
| Embodiment 3 | 99.997 | 0.334 | 3.00 |
| Embodiment 4 | 99.997 | 0.336 | 3.05 |
| Embodiment 5 | 99.996 | 0.335 | 3.01 |
| Embodiment 6 | 99.995 | 0.329 | 2.96 |
| Embodiment 7 | 99.996 | 0.330 | 3.20 |
| Embodiment 8 | 99.997 | 0.363 | 3.41 |
| Embodiment 9 | 99.992 | 0.285 | 2.71 |
| Embodiment 10 | 99.992 | 0.291 | 2.80 |
| Comparative example 1 | 99.995 | 0.320 | 3.91 |
| Comparative example 2 | 99.997 | 0.387 | 4.82 |
| Comparative example 3 | 99.983 | 0.240 | 2.57 |
| Comparative example 4 | 99.997 | 0.410 | 4.20 |
| Comparative example 5 | 99.995 | 0.358 | 3.89 |
| Comparative example 6 | 99.977 | 0.245 | 2.70 |
With reference to table 2, the polarizing film of the present invention can be confirmed while meeting high-orientation and absorbing contraction small in axis direction
Power, degree of polarization are also excellent.
However, in the case of comparative example, it is known that show the convergent force that axis direction is absorbed if degree of polarization is excellent it is high,
The low problem of degree of polarization if the convergent force for absorbing axis direction is low.
Claims (2)
1. a kind of manufacturing method of polarizing film, the manufacturing method include successively：The swelling of polarizing film formation film, dyeing, crosslinking,
Complementary color and drying steps,
The cross-linking step includes：Polarizing film formation film stretching is 2.00 to 3.00 times by the first cross-linking step；And second
Polarizing film formation film stretching is 0.80~1.00 times after first cross-linking step by cross-linking step,
It it is 1.01~1.25 times by polarizing film formation film stretching in the complementary color step.
2. the manufacturing method of polarizing film according to claim 1, wherein
It it is 0.85 to 1.00 times by polarizing film formation film stretching in second cross-linking step.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0155300 | 2015-11-05 | ||
| KR1020150155300A KR20170053037A (en) | 2015-11-05 | 2015-11-05 | Polarizer and method of preparing the same |
| PCT/JP2016/082663 WO2017078095A1 (en) | 2015-11-05 | 2016-11-02 | Polarizer and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107111043A CN107111043A (en) | 2017-08-29 |
| CN107111043B true CN107111043B (en) | 2018-08-28 |
Family
ID=58662174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680005705.XA Active CN107111043B (en) | 2015-11-05 | 2016-11-02 | Polarizing film and its manufacturing method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6197146B1 (en) |
| KR (2) | KR20170053037A (en) |
| CN (1) | CN107111043B (en) |
| TW (1) | TWI702423B (en) |
| WO (1) | WO2017078095A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102236534B1 (en) * | 2018-11-02 | 2021-04-06 | 주식회사 엘지화학 | Preparation Method of Polarizer |
| CN116234678A (en) * | 2020-09-30 | 2023-06-06 | 株式会社可乐丽 | Method for manufacturing polarizing film |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01193803A (en) * | 1988-01-29 | 1989-08-03 | Diafoil Co Ltd | Production of polarizing film |
| JPH04204907A (en) * | 1990-11-30 | 1992-07-27 | Toray Ind Inc | Polarizing film |
| JP2005031577A (en) * | 2003-07-11 | 2005-02-03 | Fuji Photo Film Co Ltd | Polarizing film, polarizing plate and liquid crystal display |
| JP2005084506A (en) * | 2003-09-10 | 2005-03-31 | Sumitomo Chemical Co Ltd | Polarizing film, its manufacturing method, polarizing plate, and optical laminate |
| JP2005266326A (en) * | 2004-03-18 | 2005-09-29 | Nitto Denko Corp | Method for manufacturing polarizing film, polarizing film, optical film using the same and image display device |
| JP4594804B2 (en) * | 2005-06-17 | 2010-12-08 | 大倉工業株式会社 | Manufacturing method of polarizing film |
| JP5009690B2 (en) * | 2006-06-15 | 2012-08-22 | 日東電工株式会社 | Polarizing plate, image display device, and manufacturing method of polarizing plate |
| JP4339350B2 (en) * | 2006-11-20 | 2009-10-07 | 日東電工株式会社 | Manufacturing method of polarizer |
| JP2009063829A (en) * | 2007-09-06 | 2009-03-26 | Sumitomo Chemical Co Ltd | Polarizing film, polarizing plate and those manufacturing method |
| JP5548469B2 (en) * | 2010-02-15 | 2014-07-16 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP5438581B2 (en) * | 2010-03-31 | 2014-03-12 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP6191197B2 (en) * | 2013-03-29 | 2017-09-06 | 住友化学株式会社 | Manufacturing method of polarizing film |
| KR101400132B1 (en) * | 2013-10-07 | 2014-05-30 | 동우 화인켐 주식회사 | Preparing method for polarizer |
| KR101938411B1 (en) * | 2014-01-13 | 2019-01-15 | 동우 화인켐 주식회사 | Polarizing plate |
| JPWO2016104741A1 (en) * | 2014-12-26 | 2017-09-28 | 富士フイルム株式会社 | Polarizer, polarizing plate and image display device |
| KR101663698B1 (en) * | 2015-03-16 | 2016-10-07 | 동우 화인켐 주식회사 | Preparing method for polarizer |
-
2015
- 2015-11-05 KR KR1020150155300A patent/KR20170053037A/en unknown
-
2016
- 2016-11-02 CN CN201680005705.XA patent/CN107111043B/en active Active
- 2016-11-02 KR KR1020177019829A patent/KR101852355B1/en active IP Right Review Request
- 2016-11-02 WO PCT/JP2016/082663 patent/WO2017078095A1/en active Application Filing
- 2016-11-02 JP JP2017514572A patent/JP6197146B1/en active Active
- 2016-11-04 TW TW105135896A patent/TWI702423B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107111043A (en) | 2017-08-29 |
| KR101852355B1 (en) | 2018-04-27 |
| KR20170053037A (en) | 2017-05-15 |
| JPWO2017078095A1 (en) | 2017-11-02 |
| TWI702423B (en) | 2020-08-21 |
| TW201728927A (en) | 2017-08-16 |
| JP6197146B1 (en) | 2017-09-13 |
| WO2017078095A1 (en) | 2017-05-11 |
| KR20170089439A (en) | 2017-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI702421B (en) | Polarizer and method for manufacturing the same | |
| JP6144731B2 (en) | Polarizer | |
| JP2015075762A (en) | Method of manufacturing polarizer | |
| KR20150052777A (en) | Process for Preparing Polarizer | |
| CN108351453A (en) | Polarizing film and its manufacturing method | |
| TWI663435B (en) | Method for producing polarizer | |
| KR20150001276A (en) | Method for preparing polarizer and polarizer | |
| JPWO2016027864A1 (en) | Manufacturing method of polarizer | |
| CN107111043B (en) | Polarizing film and its manufacturing method | |
| KR101718937B1 (en) | Method of preparing polarizer for led | |
| KR20130030990A (en) | Method for preparing polarizer | |
| JP6723240B2 (en) | Method of manufacturing polarizer | |
| KR20150001275A (en) | Method for preparing polarizer and polarizer | |
| JPWO2017010355A1 (en) | Manufacturing method of polarizer | |
| KR20160080335A (en) | Process for Preparing Polarizer | |
| KR20210069893A (en) | Process for Preparing Polarizer | |
| KR20150001273A (en) | Method for preparing polarizer and polarizer | |
| JP2021167948A (en) | Polarization film | |
| KR20150041211A (en) | Method for preparing polarizer and polarizer | |
| KR20150001274A (en) | Method for preparing polarizer and polarizer | |
| KR20150039983A (en) | Method for preparing polarizer and polarizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |