JP7391334B2 - 偏光板、およびディスプレイ装置 - Google Patents
偏光板、およびディスプレイ装置 Download PDFInfo
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- JP7391334B2 JP7391334B2 JP2020566933A JP2020566933A JP7391334B2 JP 7391334 B2 JP7391334 B2 JP 7391334B2 JP 2020566933 A JP2020566933 A JP 2020566933A JP 2020566933 A JP2020566933 A JP 2020566933A JP 7391334 B2 JP7391334 B2 JP 7391334B2
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- glare layer
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- RUYUCCQRWINUHE-UHFFFAOYSA-N Octachlorostyrene Chemical compound ClC(Cl)=C(Cl)C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RUYUCCQRWINUHE-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- YMOONIIMQBGTDU-VOTSOKGWSA-N [(e)-2-bromoethenyl]benzene Chemical compound Br\C=C\C1=CC=CC=C1 YMOONIIMQBGTDU-VOTSOKGWSA-N 0.000 description 1
- QROGIFZRVHSFLM-QHHAFSJGSA-N [(e)-prop-1-enyl]benzene Chemical compound C\C=C\C1=CC=CC=C1 QROGIFZRVHSFLM-QHHAFSJGSA-N 0.000 description 1
- QROGIFZRVHSFLM-KXFIGUGUSA-N [(z)-prop-1-enyl]benzene Chemical compound C\C=C/C1=CC=CC=C1 QROGIFZRVHSFLM-KXFIGUGUSA-N 0.000 description 1
- YPCHGLDQZXOZFW-UHFFFAOYSA-N [2-[[4-methyl-3-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]carbonylamino]phenyl]carbamoyloxymethyl]-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound CC1=CC=C(NC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C)C=C1NC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C YPCHGLDQZXOZFW-UHFFFAOYSA-N 0.000 description 1
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- 125000005907 alkyl ester group Chemical group 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 239000001913 cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
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- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 229910052736 halogen Chemical group 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- LNCPIMCVTKXXOY-UHFFFAOYSA-N hexyl 2-methylprop-2-enoate Chemical compound CCCCCCOC(=O)C(C)=C LNCPIMCVTKXXOY-UHFFFAOYSA-N 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 125000003566 oxetanyl group Chemical group 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- PMJHHCWVYXUKFD-UHFFFAOYSA-N piperylene Natural products CC=CC=C PMJHHCWVYXUKFD-UHFFFAOYSA-N 0.000 description 1
- 229920006294 polydialkylsiloxane Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- QROGIFZRVHSFLM-UHFFFAOYSA-N trans-beta-methyl styrene Natural products CC=CC1=CC=CC=C1 QROGIFZRVHSFLM-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
-
- 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
-
- 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- 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
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
-
- 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
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
-
- 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
-
- 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
-
- 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
- G02F1/133502—Antiglare, refractive index matching layers
-
- 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)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Laminated Bodies (AREA)
- Polarising Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Description
本出願は、2019年01月14日付韓国特許出願第10-2019-0004838号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。
防眩層の一面中の微細突起が位置する領域の比率=(微細突起の個数×5mmの直径を有する円の面積)/防眩層の一面の面積(mm2)
(1)防眩層形成用コーティング組成物の製造
下記表1に記載された成分を混合して防眩層形成用コーティング組成物を製造した。
下記表1に記載された高分子基材上に前記製造された防眩層形成用コーティング液それぞれを#12番 mayer barでコーティングした後、40℃の温度で2分乾燥し、UV硬化して防眩層(コーティング厚さは4μm)を形成した。UV硬化時、UVランプはH bulbを用いて、窒素雰囲気下で硬化反応を行い、硬化時に照射されたUV光量は150mJ/cm2である。
PETA:ペンタエリトリトールテトラアクリレート
UA-306T:ウレタンアクリレートであって、トルエンジイソシアネートとペンタエリトリトールトリアクリレートの反応物(Kyoeisha製品)
G8161:光硬化型アクリレートポリマー(Mw~200,000、San nopco製品)
IRG-184:開始剤(Irgacure 184、Ciba社)
Tego-270:Tego社レベリング剤
BYK350:BYK社レベリング剤
XX-103BQ(2.0μm RI1.515):ポリスチレンとポリメチルメタクリレートの共重合粒子(Sekisui Plastic製品)
XX-113BQ(2.0μm RI1.555):ポリスチレンとポリメチルメタクリレートの共重合粒子(Sekisui Plastic製品)
MA-ST(30%メタノール溶液):大きさ10~15nmのナノシリカ粒子がメチルアルコールに分散した分散液(Nissan Chemical製品)
EtOH:エタノール
n-BA:n-ブチルアセテート
2-BuOH:2-ブタノール
前記製造例および比較製造例それぞれで製造された光学積層体の高分子基材側にUV接着剤を用いてポリビニルアルコール偏光子(厚さ:25μm、製造会社:エルジー化学)を接合した。
実験例1:光学積層体のヘイズ評価
前記製造例および比較製造例それぞれで得られた光学積層体から4cm×4cmの試片を準備し、ヘイズ測定器(HM-150、A光源、村上社)で3回測定して平均値を計算し、これを全体ヘイズ値として算出した。測定時、透光度とヘイズは同時に測定され、透光度はJIS K 7361規格、ヘイズはJIS K 7136規格によって測定した。
前記製造例および比較製造例それぞれで得られた光学積層体に対してスガ試験機株式会社(Suga Test Instrument Co., Ltd.)のICM-1Tを用いて像鮮明度を測定した。像鮮明度は、スリット幅0.125mm、0.5mm、1mm、2mmで測定して総合計で表示する。
前記製造例および比較製造例それぞれで得られた光学積層体から50cm×50cm(横×縦)に切断したサンプルを照度700luxのLED照明下で黒色無光紙の上に下ろした。そして、前記サンプルフィルム表面基準にして光が70度で入射されるようにフィルムを配置した後、光が反射される側から観察して周辺部より煌めきが強い微細突起を探した。
防眩層の一面中の微細突起が位置する領域の比率=(微細突起の個数×5mmの直径を有する円の面積)/防眩層の一面の面積(mm2)
突起数(個/m2):50cm×50cmで測定された個数×4
前記サンプルを0.5cm幅に切断して断面を取って、ミクロトーム技法を用いて断面サンプルを製作した。観察しようとする表面と断面を白金(Pt)でコーティングした後、SEMでコーティング層の厚さ、浸食層の厚さ、ゴム粒子の位置などを観察した。浸食層がよく示されない場合、断面サンプルの表面をマイクロ波でエッチングし、白金コーティングした後、観察して浸食層の厚さを確認した。
耐スクラッチ測定機器(KPD-301、Kipae Engineering & Technology Co., Ltd.)を用いてスチールウール(#0000)に荷重をかけて幅2.5cm、長さ13cmの区間を27rpmの速度で10回往復しながら実施例および比較例で得られた反射防止フィルムの表面を擦った。肉眼で観察される1cm以下のスクラッチ一つ以下が観察される最大荷重を測定した。
実施例4
(1)低反射層形成用コーティング液(C)の製造
トリメチロールプロパントリアクリレート(TMPTA)100g、中空型シリカナノ粒子(直径範囲:約42nm~66nm、JSC catalyst and chemicals社製品)283g、ソリッド型シリカナノ粒子(直径範囲:約12nm~19nm)59g、第1含フッ素化合物(X-71-1203M、ShinEtsu社)115g、第2含フッ素化合物(RS-537、DIC社)15.5gおよび開始剤(Irgacure 127、Ciba社)10gを、MIBK(メチルイソブチルケトン)溶媒に固形分濃度3重量%になるように希釈して低反射層形成用コーティング液を製造した。
前記実施例1で高分子基材上に前記防眩層を形成した以後に、前記低反射層形成用コーティング液(C)を#4 mayer barで厚さが約110~120nmになるようにコーティングし、40℃で1分間乾燥および硬化(252mJ/cm2の紫外線を照射)して低屈折層を形成した点を除いて、実施例1と同様な方法で偏光板を製造した。
UV接着剤を用いてポリビニルアルコール偏光子(厚さ:17μm、製造会社:エルジー化学)の一面にTAC(トリアセチルセルロース)フィルム(厚さ:60μm)を接合し、前記TACフィルム上に前記製造例1のコーティング液を#12番 mayer barでコーティングした後、40℃の温度で2分間乾燥し、UV硬化して防眩層(コーティング厚さは4μm)を形成した。UV硬化時、UVランプはH bulbを用いて、窒素雰囲気下で硬化反応を行い、硬化時照射されたUV光量は150mJ/cm2である。
UV接着剤を用いてポリビニルアルコール偏光子(厚さ:17μm、製造会社:エルジー化学)の一面に60μm厚さのMUVアクリレート樹脂フィルム(LG化学製品、100nm厚さのprimer層が一面に形成された60μm厚さのアクリレートフィルム)を接合し、前記プライマー層上に前記製造例1のコーティング液を#12番 mayer barでコーティングした後、40℃の温度で2分乾燥し、UV硬化して防眩層(コーティング厚さは4μm)を形成した。UV硬化時、UVランプはH bulbを用いて、窒素雰囲気下で硬化反応を行い、硬化時照射されたUV光量は150mJ/cm2である。
前記実施例4および比較例4および5で製造された偏光板をTV用ガラス(横12cm、縦12cm、厚さ0.7mm)の一面に接合して熱衝撃および耐水性評価用サンプルを製造する。この時、偏光子のMD方向が正四角形の一辺と平行に偏光板を裁断する。
偏光板と評価用サンプルを熱衝撃チャンバーに垂直に立てておく。常温から80℃に昇温して30分間放置し、以後温度を-30℃に下げて30分間放置後、常温に温度調節することを1サイクルにして総100サイクルを繰り返した。
前記偏光板サンプルの四つの頂点を観察してコーティング層と偏光子の間の浮き上がり、偏光子と保護フィルムの間の剥離、ハードコーティングと粘着層間の剥離と撓みを観察する。浮き上がりが発生して撓みが現れる場合、扁平に床に置いた状態で床から撓んだ高さを測定して平均を求めた。
裁断した試片をガラス基板(soda lime glass)に付着してサンプルを製造した。その次に、製造されたサンプルを60℃の温度の水に投入し、24時間放置した後に取り出して気泡または剥離の発生有無を観察して、下記基準にして耐水性を評価した。耐水性の測定直前に製造されたサンプルを常温で24時間放置し、評価を行った。評価条件は下記の通りである。
△:コーティング層と基材層および接着剤層と粘着剤層の界面で気泡および/または剥離若干発生
O:コーティング層と基材層および接着剤層と粘着剤層の界面で気泡および/または剥離多量発生
2 防眩層
3 ゴム粒子
4 高分子基材および防眩層の界面
5 防眩層の表面
6 高分子基材および防眩層の界面からゴム粒子が存在する最大範囲
Claims (10)
- 偏光子;
前記偏光子の一面側に形成され、高分子基材と防眩層を含む光学積層体;および
前記偏光子の他の一面側に形成され、(メタ)アクリレート系樹脂を含む熱可塑性樹脂層;を含み、
前記高分子基材は、高分子樹脂および前記高分子樹脂に分散した10~500nmの断面直径を有するゴム粒子を含み、
前記防眩層は、バインダー樹脂および前記バインダー上に分散している有機微粒子または無機微粒子を含み、
前記防眩層は、前記バインダー樹脂100重量部に対して前記有機微粒子または無機微粒子を1~10重量部を含み、
前記ゴム粒子は、前記高分子基材および前記防眩層の界面から防眩層側に前記防眩層の厚さの75%以内にのみ存在し、
前記有機微粒子または無機微粒子が凝集して形成される直径100μm~300μmである微細突起が前記防眩層の外部表面に存在する比率が1個以上50個/m2以下であり、前記微細突起の直径は、前記防眩層の表面での前記防眩層の表面に平行な方向への断面幅で決定され、
下記一般式1で定義される防眩層の一面中の前記微細突起が位置する領域の比率が0.5面積%以下である、
偏光板。
[一般式1]
防眩層の一面中の前記微細突起が位置する領域の比率=(微細突起の個数×5mmの直径を有する円の面積)/防眩層の一面の面積(mm 2 )
上記一般式1での“5mmの直径を有する円”は、前記微細突起が位置する領域と定義する。 - 前記高分子樹脂は、(メタ)アクリレート樹脂、セルロース樹脂、ポリオレフィン樹脂、およびポリエステル樹脂からなる群より選択された1種以上を含む、請求項1に記載の偏光板。
- 前記ゴム粒子は、スチレン系ゴム、ブタジエン系ゴム、スチレン-ブタジエン系ゴム、およびアクリル系ゴムからなる群より選択された1種以上のゴムを含む、請求項1又は2に記載の偏光板。
- 前記高分子基材は、10~150μmの厚さを有し、
前記防眩層は、1~10μmの厚さを有する、請求項1~3のいずれか一項に記載の偏光板。 - 前記高分子基材の厚さに対する前記防眩層の厚さの比率が0.008~0.8である、請求項1~4のいずれか一項に記載の偏光板。
- 前記熱可塑性樹脂層は、10μm~80μmの厚さを有する、請求項1~5のいずれか一項に記載の偏光板。
- 前記高分子基材の厚さに対する前記熱可塑性樹脂層の厚さの比率が0.3~2.0である、請求項1~6のいずれか一項に記載の偏光板。
- 前記高分子基材は、前記高分子樹脂100重量部に対して10~500nmの断面直径を有するゴム粒子5~50重量部を含む、請求項1~7のいずれか一項に記載の偏光板。
- 40℃、湿度100%条件で24時間測定した前記高分子基材の水分透過量が150g/m2以下である、請求項1~8のいずれか一項に記載の偏光板。
- 請求項1~9のいずれか一項の偏光板を含むディスプレイ装置。
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