JP2016534414A - ナチュラルブラックに近づいた偏光板の製造方法およびこれを用いて製造された偏光板 - Google Patents
ナチュラルブラックに近づいた偏光板の製造方法およびこれを用いて製造された偏光板 Download PDFInfo
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- JP2016534414A JP2016534414A JP2016545686A JP2016545686A JP2016534414A JP 2016534414 A JP2016534414 A JP 2016534414A JP 2016545686 A JP2016545686 A JP 2016545686A JP 2016545686 A JP2016545686 A JP 2016545686A JP 2016534414 A JP2016534414 A JP 2016534414A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 57
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 55
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 45
- 239000011630 iodine Substances 0.000 claims abstract description 45
- 230000001678 irradiating effect Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 59
- 239000000975 dye Substances 0.000 claims description 31
- 230000010287 polarization Effects 0.000 claims description 29
- 238000002834 transmittance Methods 0.000 claims description 23
- 238000002835 absorbance Methods 0.000 claims description 22
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- 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 10
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- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 7
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- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 5
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- 150000002497 iodine compounds Chemical class 0.000 description 3
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- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N alpha-ketodiacetal Natural products O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
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- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 2
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- UAYWVJHJZHQCIE-UHFFFAOYSA-L zinc iodide Chemical compound I[Zn]I UAYWVJHJZHQCIE-UHFFFAOYSA-L 0.000 description 2
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- UNMYWSMUMWPJLR-UHFFFAOYSA-L Calcium iodide Chemical compound [Ca+2].[I-].[I-] UNMYWSMUMWPJLR-UHFFFAOYSA-L 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
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- 238000005411 Van der Waals force Methods 0.000 description 1
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- CECABOMBVQNBEC-UHFFFAOYSA-K aluminium iodide Chemical compound I[Al](I)I CECABOMBVQNBEC-UHFFFAOYSA-K 0.000 description 1
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- 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
- 229910021538 borax Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 229910001640 calcium iodide Inorganic materials 0.000 description 1
- 229940046413 calcium iodide Drugs 0.000 description 1
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- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
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- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
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- 235000009518 sodium iodide Nutrition 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- QPBYLOWPSRZOFX-UHFFFAOYSA-J tin(iv) iodide Chemical compound I[Sn](I)(I)I QPBYLOWPSRZOFX-UHFFFAOYSA-J 0.000 description 1
- NLLZTRMHNHVXJJ-UHFFFAOYSA-J titanium tetraiodide Chemical compound I[Ti](I)(I)I NLLZTRMHNHVXJJ-UHFFFAOYSA-J 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
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- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
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- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
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- B05D3/108—Curing
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/005—Shaping by stretching, e.g. drawing through a die; Apparatus therefor characterised by the choice of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29D11/00865—Applying coatings; tinting; colouring
- B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- 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
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
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- B29K2105/0032—Pigments, colouring agents or opacifiyng agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
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- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
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Abstract
Description
主に、初期染着および延伸後には、長波長領域の光を吸収するI5 −(620nm)が主に生成され、偏光板が青色を呈する。したがって、光を照射するステップによりI5 −を解離(dissociation)させると、I5 −がI3 −と2Iに分解される。以後、水分を供給するステップを経ると、水分によって、分解された2Iの流動性(mobility)が増加し、流動性の増加によって不安定な2Iが先にI2に結合され、短波長領域(460nm)で先に透過度が減少し、次いでI3 −と結合して、再度I5 −を生成して、長波長領域(620nm)の透過度を減少させる。したがって、結果的に、I5 −が減少し、I2が増加して、長波長の光を主に吸収していた偏光板は、短波長の光の吸収量が増加して、ナチュラルブラック(natural black)に近い色を有するようになる。
I5 −+I−→I2+I3 −+I−
偏光度=[(Tp−Tc)/(Tp+Tc)]1/2
ポリビニルアルコール系フィルム(日本合成社製M3000 grade30μm)を、25℃の純水溶液で膨潤工程を15秒間経た後、0.2wt%の濃度および25℃のヨウ素溶液で60秒間染着工程を進行させた。以後、ホウ酸1wt%、45℃の溶液で30秒間洗浄工程を経た後、ホウ酸2.5wt%、52℃の溶液で6倍延伸工程を進行させた。以後、60℃のオーブンで5分間乾燥させることにより、厚さ12μmの偏光子を製造した。
前記製造例により製造された偏光板を60mm×60mmに裁断した後、レーザ(Verdi V2、Coherent社)を用いて、532nmの波長を、20J/cm2の強度で露光した後、60℃および相対湿度90%で、60分間恒温恒湿器(TH−I−300、YOKOGAWA社)に保管して、補色過程を経た偏光板を製造した。
前記製造例により製造された偏光板で、その他の追加的なステップを経ていない偏光板を製造した。
前記製造例により製造された偏光板を60mm×60mmに裁断した後、レーザ(Verdi V2、Coherent社)を用いて、532nmの波長を、20J/cm2の強度で露光するステップを経た偏光板を製造した。
ポリビニルアルコール系フィルム(日本合成社製M3000 grade30μm)を、25℃の純水溶液で膨潤工程を15秒間経た後、0.2wt%の濃度および25℃のヨウ素溶液で60秒間染着工程を進行させた。以後、ホウ酸1wt%、45℃の溶液で30秒間洗浄工程を経た後、ホウ酸2.5wt%、52℃の溶液で6倍延伸工程を進行させた。延伸後、5wt%のKI溶液で補色工程を経た後、60℃のオーブンで5分間乾燥させることにより、厚さ12μmの偏光子を製造した。
1.光学物性の測定
前記実施例1および比較例1〜3により製造された偏光板を40mm×40mmの大きさに切って、この試験片を測定ホルダに固定させた後、紫外可視光線分光計(V−7100、JASCO社製造)を用いて、初期光学物性、すなわち、単体透過度(Ts)、偏光度、色相(単体a、単体b、直交a、直交b)を測定した。前記単体透過度(Ts)と単体色相(a、b)は、偏光板一枚に対する測定値であり、直交色相(直交a、直交b)は、裁断された偏光板2枚を、吸収軸が90゜となるように互いに直交させた後に測定して、表1に示した。
偏光度=[(Tp−Tc)/(Tp+Tc)]1/2
実施例および比較例により製造された偏光板を、80℃の条件下で500時間露出させた後、前記に記載の方法で偏光度および単体透過度を測定して、表1に示した。
前記実施例1および比較例1〜3により製造された偏光板を、光源としてDH−2000(Ocean optics社)と、detectorとしてUSB4000(Ocean optics社)を用いて吸収スペクトル(Absorption Spectrum)を測定して、図1に示した。
前記製造例により製造された60mm×60mmの偏光板を、532nmのレーザ(Verdi V2、Coherent社)を用いて、20J/cm2の強度で照射した後、60℃、相対湿度90%に放置する場合、放置時間に応じた吸収軸の透過度の変化を測定して、図2に示した。
Claims (10)
- ヨウ素および二色性染料のうちのいずれか1つ以上が染着したポリビニルアルコール系偏光子を含む偏光部材を用意するステップと、
前記偏光部材に200nm〜800nmの波長範囲から選択された特定波長の光を照射するステップと、
前記偏光部材に水分を供給するステップとを順次に含むことを特徴とする、偏光板の製造方法。 - 前記光を照射するステップは、0.5〜550J/cm2の強度で行われることを特徴とする、請求項1に記載の偏光板の製造方法。
- 前記光を照射するステップは、発光ダイオード(LED)またはレーザランプを用いることを特徴とする、請求項1に記載の偏光板の製造方法。
- 前記水分を供給するステップは、偏光部材を、40℃〜70℃および相対湿度90%以上で、10分〜3時間放置する方法で行われることを特徴とする、請求項1に記載の偏光板の製造方法。
- ヨウ素および二色性染料のうちのいずれか1つ以上が染着したポリビニルアルコール系偏光子を含み、
460nmで測定した直交吸光度に対する620nmで測定した直交吸光度の比が1:0.8〜1:1.1であることを特徴とする、偏光板。 - 前記偏光板の単体色相b値が3.5〜4.6であることを特徴とする、請求項5に記載の偏光板。
- 前記偏光板の直交色相b値が−1〜0であることを特徴とする、請求項5に記載の偏光板。
- 前記偏光板を、80℃以上の高温条件下で500時間露出させた後、偏光度が99.9%以上であることを特徴とする、請求項5に記載の偏光板。
- 前記偏光板を、80℃以上の高温条件下で500時間露出させた後、単体透過度が42%〜45%であることを特徴とする、請求項5に記載の偏光板。
- 表示パネルと、
前記表示パネルの一面または両面に付着しており、請求項5に記載の偏光板とを含むことを特徴とする、画像表示装置。
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