JP6188187B2 - ヨウ素系偏光子、偏光板、光学フィルムおよび画像表示装置 - Google Patents
ヨウ素系偏光子、偏光板、光学フィルムおよび画像表示装置 Download PDFInfo
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- JP6188187B2 JP6188187B2 JP2012229953A JP2012229953A JP6188187B2 JP 6188187 B2 JP6188187 B2 JP 6188187B2 JP 2012229953 A JP2012229953 A JP 2012229953A JP 2012229953 A JP2012229953 A JP 2012229953A JP 6188187 B2 JP6188187 B2 JP 6188187B2
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- Prior art keywords
- iodine
- polarizer
- polarizing plate
- film
- reducing agent
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- 229910052740 iodine Inorganic materials 0.000 title claims description 75
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- 239000011668 ascorbic acid Substances 0.000 claims description 8
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- DOUMFZQKYFQNTF-MRXNPFEDSA-N rosemarinic acid Natural products C([C@H](C(=O)O)OC(=O)C=CC=1C=C(O)C(O)=CC=1)C1=CC=C(O)C(O)=C1 DOUMFZQKYFQNTF-MRXNPFEDSA-N 0.000 description 1
- TVHVQJFBWRLYOD-UHFFFAOYSA-N rosmarinic acid Natural products OC(=O)C(Cc1ccc(O)c(O)c1)OC(=Cc2ccc(O)c(O)c2)C=O TVHVQJFBWRLYOD-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229940048910 thiosulfate Drugs 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
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Electroluminescent Light Sources (AREA)
Description
前記ヨウ素系偏光子は、少なくとも一つの還元剤を含有する処理浴による処理が施されており、且つ前記ヨウ素系偏光子は還元剤の酸化体を含有し、かつ還元剤およびその酸化体の合計含有量が0.06×10−6〜1.6×10−6mol/gであることを特徴するヨウ素系偏光子、に関する。
原反フィルムとして、平均重合度2400、厚さ75μmのポリビニルアルコールフィルム((株)クラレ製のVF−PS7500)を用いた。当該ポリビニルアルコールフィルムに、下記の順番にて、下記各工程を施した。
膨潤浴の処理液としては、純水を用いた。上記ポリビニルアルコールフィルムを膨潤浴に搬送し、30℃に調整した純水中に1分間浸漬しながら2.2倍に延伸し、膨潤させた。
染色浴の処理液としては、ヨウ素濃度が0.045重量%で、ヨウ素とヨウ化カリウムをヨウ素:ヨウ化カリウム(重量比=1:7)のヨウ素染色溶液を用いた。上記膨潤処理されたポリビニルアルコールフィルムを染色浴に搬送し、30℃に調整した前記ヨウ素染色溶液に、30秒間浸漬しながら、元長に対して延伸倍率3.3倍まで、一軸延伸しながら、染色した。
架橋浴の処理液としては、ホウ酸を3重量%、ヨウ化カリウムを3重量%含有する混合水溶液を用いた。上記処理されたポリビニルアルコールフィルムを架橋浴に搬送し、30℃に調整した前記混合水溶液に、30秒間浸漬しながら、元長に対して総延伸倍率3.6倍まで、一軸延伸した。
延伸浴の処理液としては、ホウ酸を4重量%、ヨウ化カリウムを5重量%、還元剤としてアスコルビン酸を0.00125重量%含有する水溶液を用いた。上記処理されたポリビニルアルコールフィルムを延伸浴に搬送し、60℃に調整した水溶液に、60秒間浸漬しながら、元長に対して総延伸倍率6倍まで、一軸延伸した。
洗浄浴の処理液としては、ヨウ化カリウムを3重量%含有する水溶液を用いた。上記処理されたポリビニルアルコールフィルムを洗浄浴に搬送し、30℃に調整した当該水溶液に、10秒間浸漬した。
次いで、上記処理されたポリビニルアルコール系フィルムを、60℃のオーブンで4分間乾燥して、ヨウ素系偏光子を得た。
実施例1において、還元剤の種類、還元剤を添加した各工程に係る浴およびその浴における濃度を表1に示すように変えたこと以外は、実施例1と同条件でヨウ素偏光子を作製した。比較例1では、還元剤をいずれの浴にも配合していない。
実施例および比較例で得られたヨウ素系偏光子の光学特性を以下の方法により測定した。結果を表1に示す。
GPC(ゲル浸透クロマトグラフィ)(TOSOH,HLC-8120GPC)を用いて、偏光子1g中に存在する還元剤およびその酸化体の合計量(μg/g)の測定を行った。得られた測定結果を還元剤およびその酸化体の分子量で割った値を含有量(mol/g)とした。
偏光子の単体透過率(Ts)、偏光度(P)は、積分球付き分光光度計(日本分光(株)製のV7100)にて測定した。
なお、偏光度は、2枚の同じ偏光子を両者の透過軸が平行となるように重ね合わせた場合の透過率(平行透過率:Tp)および、両者の透過軸が直交するように重ね合わせた場合の透過率(直交透過率:Tc)を以下の式に適用することにより求められるものである。
偏光度P(%)={(Tp−Tc)/(Tp+Tc)}1/2×100
各透過率は、グランテラープリズム偏光子を通して得られた完全偏光を100%として、JIS Z8701の2度視野(C光源)により視感度補整したY値で示したものである。測定波長は、波長550nmであった。
波長410nmのコントラスト(Cr410nm)は、波長410nmの平行透過率(Tp410nm)と波長410nmの直交透過率(Tc410nm)を用いて、下記式の計算式によって求めた。
コントラスト(Cr410nm)=平行透過率(Tp410nm)/直交透過率(Tc410nm)
なお、これらの透過率は、JlSZ 8701の2度視野(C光源)により、視感度補正を行ったY値である。
Claims (5)
- ポリビニルアルコール系フィルムにヨウ素が吸着配向されているヨウ素系偏光子であって、
前記ヨウ素系偏光子は、少なくとも一つの還元剤を含有する処理浴による処理が施されており、且つ前記ヨウ素系偏光子は還元剤の酸化体を含有し、かつ還元剤およびその酸化体の合計含有量が0.06×10−6〜1.6×10−6mol/gであり、
前記還元剤を含有する処理浴の還元剤の濃度が0.008〜0.015重量%であることを特徴とするヨウ素系偏光子の製造方法。 - 前記還元剤が、アスコルビン酸、エリソルビン酸、チオ硫酸、亜硫酸およびこれらの塩のいずれか少なくとも1種類を含むことを特徴とする請求項1記載のヨウ素系偏光子の製造方法。
- 請求項1または2記載のヨウ素偏光子の少なくとも片面に、透明保護フィルムを有することを特徴とする偏光板の製造方法。
- 請求項1もしくは2記載のヨウ素偏光子または請求項3記載の偏光板を有することを特徴とする光学フィルムの製造方法。
- 請求項1もしくは2記載のヨウ素偏光子、請求項3記載の偏光板または請求項4記載の光学フィルムを有することを特徴とする画像表示装置の製造方法。
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JP2012229953A JP6188187B2 (ja) | 2012-01-05 | 2012-10-17 | ヨウ素系偏光子、偏光板、光学フィルムおよび画像表示装置 |
PCT/JP2012/079815 WO2013103054A1 (ja) | 2012-01-05 | 2012-11-16 | ヨウ素系偏光子、偏光板、光学フィルムおよび画像表示装置 |
CN201280066331.4A CN104040386B (zh) | 2012-01-05 | 2012-11-16 | 碘系偏振片、偏振板、光学膜及图像显示装置 |
US14/366,869 US10025014B2 (en) | 2012-01-05 | 2012-11-16 | Iodine-based polarizer, polarizing plate, optical film, and image display device |
KR1020147014237A KR101940849B1 (ko) | 2012-01-05 | 2012-11-16 | 요오드계 편광자, 편광판, 광학 필름 및 화상 표시 장치 |
TW101144148A TWI474059B (zh) | 2012-01-05 | 2012-11-26 | Iodine polarizer, polarizing plate, optical film and image display device |
US15/986,240 US10620353B2 (en) | 2012-01-05 | 2018-05-22 | Iodine-based polarizer, polarizing plate, optical film, and image display device |
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JP6610020B2 (ja) * | 2014-06-23 | 2019-11-27 | 三菱ケミカル株式会社 | 偏光フィルムの製造方法及び偏光板の製造方法 |
WO2016056600A1 (ja) * | 2014-10-08 | 2016-04-14 | 株式会社クラレ | 偏光フィルム |
KR20160080335A (ko) | 2014-12-29 | 2016-07-08 | 동우 화인켐 주식회사 | 편광자의 제조방법 |
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