JPH01227101A - Polarizing film - Google Patents
Polarizing filmInfo
- Publication number
- JPH01227101A JPH01227101A JP5465788A JP5465788A JPH01227101A JP H01227101 A JPH01227101 A JP H01227101A JP 5465788 A JP5465788 A JP 5465788A JP 5465788 A JP5465788 A JP 5465788A JP H01227101 A JPH01227101 A JP H01227101A
- Authority
- JP
- Japan
- Prior art keywords
- manganese
- film
- iodine
- pva
- polarizing film
- 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.)
- Granted
Links
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 23
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 23
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011630 iodine Substances 0.000 claims abstract description 18
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 18
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 239000011572 manganese Substances 0.000 claims abstract description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- -1 manganese halides Chemical class 0.000 claims abstract description 4
- 150000002696 manganese Chemical class 0.000 claims abstract description 3
- 150000002697 manganese compounds Chemical class 0.000 claims description 10
- 238000002834 transmittance Methods 0.000 abstract description 9
- 229910021380 Manganese Chloride Inorganic materials 0.000 abstract description 6
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 abstract description 6
- 239000011565 manganese chloride Substances 0.000 abstract description 6
- 235000002867 manganese chloride Nutrition 0.000 abstract description 6
- 229940099607 manganese chloride Drugs 0.000 abstract description 6
- 230000010287 polarization Effects 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 abstract description 3
- RJYMRRJVDRJMJW-UHFFFAOYSA-L dibromomanganese Chemical compound Br[Mn]Br RJYMRRJVDRJMJW-UHFFFAOYSA-L 0.000 abstract description 2
- 229940071125 manganese acetate Drugs 0.000 abstract description 2
- 229940099596 manganese sulfate Drugs 0.000 abstract description 2
- 239000011702 manganese sulphate Substances 0.000 abstract description 2
- 235000007079 manganese sulphate Nutrition 0.000 abstract description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 abstract description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 abstract description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 abstract description 2
- QWYFOIJABGVEFP-UHFFFAOYSA-L manganese(ii) iodide Chemical compound [Mn+2].[I-].[I-] QWYFOIJABGVEFP-UHFFFAOYSA-L 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001437 manganese ion Inorganic materials 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 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 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 229910001429 cobalt ion Inorganic materials 0.000 description 1
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Landscapes
- Polarising Elements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、偏光能と耐湿熱耐久性に優れた偏光フィルム
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a polarizing film that has excellent polarizing ability and moisture and heat resistance.
[従来の技術]
近年、ワープロやパソコン、液晶テレビなど、液晶表示
装置の使用範囲の拡大と大面積体に伴い偏光フィルムの
需要は大幅に増大している。さらには、自動車パネル用
の液晶表示装置の需要が非常に大きく伸びると予想され
ている。これらのiα晶表示装置に用いる偏光フィルム
には今まで以上に高偏光度と高耐久性が要求されている
。[Prior Art] In recent years, the demand for polarizing films has increased significantly as the range of use of liquid crystal display devices such as word processors, personal computers, and liquid crystal televisions has expanded and as liquid crystal display devices have become larger in area. Furthermore, demand for liquid crystal display devices for automobile panels is expected to grow significantly. Polarizing films used in these iα crystal display devices are required to have a higher degree of polarization and higher durability than ever before.
[発明が解決しようとする課B]
ポリビニルアルコール(以下PVAと略記)系フィルム
を用いた偏光フィルムとしては、(1)該フィルムにヨ
ウ素を吸着配向せしめたヨウ素系フィルム、(2)該フ
ィルムに二色性色素を吸着配向せしめた色素系フィルム
、(3)該フィルムを部分的に脱水処理したポリエン系
フィルムなどが知られている。これらのうち、(1)の
ヨウ素系フィルムが他のものに比べて偏光能に優れてお
り、最も汎用されているが、耐湿熱性に問題がある。[Problem B to be Solved by the Invention] A polarizing film using a polyvinyl alcohol (hereinafter abbreviated as PVA) film includes (1) an iodine film in which iodine is adsorbed and oriented in the film; A dye-based film in which a dichroic dye is adsorbed and oriented, and (3) a polyene-based film in which the film is partially dehydrated are known. Among these, the iodine-based film (1) has better polarizing ability than the others and is most commonly used, but it has a problem in heat and humidity resistance.
これを解決する方法として、ヨウ素を吸着配向せしめる
と共にコバルトイオンを含浸せしめる方法(特開昭56
−48601号公報)やニッケルイオンを含浸せしめる
方法く特開昭62−180303号公報)が提案されて
いるが、この改良法においてもその効果は不十分であっ
て、問題は完全には解決されていない。A method to solve this problem is to adsorb and orient iodine and impregnate it with cobalt ions (Japanese Unexamined Patent Publication No. 56/1989).
48601) and a method of impregnating nickel ions (Japanese Patent Application Laid-Open No. 180303/1983), but even these improved methods are insufficiently effective and the problem has not been completely solved. Not yet.
ヨウ素系偏光フィルムは上述のごとく、高い偏光能を有
しながら耐湿熱耐久性に劣るため、その適用分野が制限
されていた。As mentioned above, although the iodine-based polarizing film has high polarizing ability, it has poor heat and humidity resistance, so its application fields have been limited.
本発明者らは、これら従来の欠点の改良を図るべく、鋭
意検討を進めた結果、本発明に到達した。The inventors of the present invention have conducted intensive studies to improve these conventional drawbacks, and as a result, have arrived at the present invention.
本発明は、優れた偏光能と耐湿熱耐久性を兼ね備えた偏
光フィルムの提供を目的とするものである。An object of the present invention is to provide a polarizing film that has both excellent polarizing ability and heat-and-moisture resistance.
[課題を解決するための手段]
本発明は目的を達成するため、次の構成を有する。ヨウ
素を吸着配向せしめてなるポリビニルアルコール系フィ
ルムにおいて、マンガン化合物を含有することを特徴と
する偏光フィルム。[Means for Solving the Problem] In order to achieve the object, the present invention has the following configuration. A polarizing film comprising a manganese compound, which is a polyvinyl alcohol film made by adsorbing and orienting iodine.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に用いられるPVA系フィルムとしてζよ、PV
Aフィルム、ポリビニルホルマールフィルム、ポリビニ
ルアセタールフィルム、ポリ(エチレン−酢酸ビニル)
共重合体ケン化フィルム、PVAの部分ポリエン化フィ
ルムのごときPVA誘導体フィルムが挙げられる。As the PVA-based film used in the present invention, ζ, PV
A film, polyvinyl formal film, polyvinyl acetal film, poly(ethylene-vinyl acetate)
Examples include PVA derivative films such as saponified copolymer films and partially polyenized PVA films.
これらのPVA系フィルムにヨウ素を吸着配向せしめる
方法としては通常の方法が適用できる。Ordinary methods can be applied to adsorb and orient iodine on these PVA films.
たとえば、未延伸の該PVA系フィルムをヨウ素とヨウ
化カリウムの水溶液に浸漬した後−軸に延伸する方法、
−軸に延伸した該PVA系フィルムをヨウ素とヨウ化カ
リウムの水溶液に浸漬する方法などである。For example, a method in which the unstretched PVA film is immersed in an aqueous solution of iodine and potassium iodide and then stretched in the -axis direction;
- A method of immersing the PVA film stretched along the axis in an aqueous solution of iodine and potassium iodide.
該PVA系フィルムにマンガン化合物を含有せ。Contain a manganese compound in the PVA film.
しめる方法についても、通常の方法が適用できる。As for the tightening method, the usual method can be applied.
たとえば、該PVA系フィルムのキャスト成膜樹脂水溶
液に、マンガン化合物を添加する方法、ヨウ素とヨウ化
カリウムの水溶液にマンガン化合物を添加し、ヨウ素の
吸着と同時にマンガンイオンを含有せしめる方法、ヨウ
素を吸着させた未延伸フィルムを、ホウ酸、ヨウ化カリ
ウム、マンガン化合物を溶解させた水溶液中で延伸する
方法、ヨウ素を吸着配向せしめた延伸フィルムをホウ酸
、ヨウ化カリウム、マンガン化合物を溶解させた水溶液
中に浸漬させる方法などである。ヨウ素の吸着、配向、
固定(PVA等の架橋)は、上述のごとくそのほとんど
が水溶液中で行なうものであることから、最終工程でマ
ンガン化合物を含有せしめる後2者の方法がより有効で
あることは容易に理解されよう。For example, a method of adding a manganese compound to an aqueous solution of casting resin for the PVA film, a method of adding a manganese compound to an aqueous solution of iodine and potassium iodide to adsorb manganese ions at the same time as adsorbing iodine, and a method of adsorbing iodine. A method of stretching an unstretched film in an aqueous solution in which boric acid, potassium iodide, and a manganese compound are dissolved; This method includes immersion in the liquid. Iodine adsorption, orientation,
Since most of the fixing (crosslinking of PVA, etc.) is carried out in an aqueous solution as mentioned above, it is easy to understand that the latter two methods, in which a manganese compound is included in the final step, are more effective. .
ここで使用されるマンガン化合物としては、塩化マンガ
ン、臭化マンガン、ヨウ化マンガンなどのハロゲン化マ
ンガンや酢酸マンガン、硫酸マンガン、硝酸マンガンな
どの無機マンガン塩を例示することができる。Examples of the manganese compound used here include manganese halides such as manganese chloride, manganese bromide, and manganese iodide, and inorganic manganese salts such as manganese acetate, manganese sulfate, and manganese nitrate.
偏光フィルム中におけるマンガン含有量としては、PV
A系フィルム1g当たり0.05〜50m g 、特に
0.5〜20 m gが適当である。The manganese content in the polarizing film is PV
A suitable amount is 0.05 to 50 mg, particularly 0.5 to 20 mg per gram of A-based film.
[作用コ
本発明者らは、耐湿熱性の劣る従来のヨウ素系PVAフ
ィルムについて、温熱処理前後における偏光フィルム中
のヨウ素濃度を調べ、濃度変化がないことを確認した。[Function] The present inventors investigated the iodine concentration in the polarizing film before and after heat treatment with respect to a conventional iodine-based PVA film with poor heat and humidity resistance, and confirmed that there was no change in concentration.
すなわち、湿熱処理によりほとんど透明となり、偏光能
をなくしたフィルム中のヨウ素濃度は以外にも変らなか
ったのである。In other words, the iodine concentration in the film, which became almost transparent and lost its polarizing ability through moist heat treatment, remained unchanged.
さらに検討を重ねた結果、可視光領域に吸収を有し、偏
光能を発現させるポリヨウ素イオンI3−やI5−が、
湿熱処理により可視光領域に吸収を持たない透明なI−
に解離するためとわかった。マンガン化合物の効果につ
いてはまだ明確な解答は得られていないが、マンガンイ
オンがPVAおよびポリヨウ素イオンと多くの配位結合
手によりキレートを形成できることとポリヨウ素イオン
の解離平衡を阻害することによるものと考えている。As a result of further studies, we found that polyiodine ions I3- and I5- have absorption in the visible light region and exhibit polarization ability.
Transparent I- with no absorption in the visible light region by moist heat treatment
It turns out that this is due to dissociation. Although a clear answer has not yet been obtained regarding the effects of manganese compounds, it is thought that manganese ions can form chelates with PVA and polyiodine ions through many coordination bonds, and that they inhibit the dissociation equilibrium of polyiodine ions. I believe.
[実施例]
以下実施例と比較例によって本発明をさらに詳細に説明
する。[Examples] The present invention will be explained in more detail below using Examples and Comparative Examples.
なお、実施例および比較例において、透過率は分光光度
計(日立製作新製、U−3400’)を用いて測定した
。In addition, in Examples and Comparative Examples, transmittance was measured using a spectrophotometer (manufactured by Hitachi Seisakusho, U-3400').
単体透過率Y、平行透過率(Y//:フィルムを 12
枚、その分子配向が互いに平行になるように重ね合わせ
た時の光透過率)、直交透過率(Y土:フィルムを2枚
、その分子配向が互いに垂直になるように重ね合わせた
時の光透過率)はいずれも可視光領域400〜700
nmにおける平均値である。Single transmittance Y, parallel transmittance (Y//: film 12
(light transmittance when two films are stacked so that their molecular orientations are parallel to each other), orthogonal transmittance (light transmittance when two films are stacked so that their molecular orientations are perpendicular to each other), Transmittance) is visible light range 400-700
It is an average value in nm.
偏光度■は次式により求めた。The degree of polarization (■) was determined by the following formula.
実施例1
130°Cで一軸方向に4.5倍に延伸したp、vAフ
ィルムにセルローストリアセテート(以下CTAと略記
)フィルムをラミネートし、PVAの片面ラミネート(
セミラミ)フィルムを得た。Example 1 A cellulose triacetate (hereinafter abbreviated as CTA) film was laminated to a p, vA film stretched 4.5 times in the uniaxial direction at 130°C, and a PVA single-sided laminate (
Semirami) film was obtained.
このセミラミフィルムを、ヨウ素0.3重量%ぐ以下w
t%と略記)、ヨウ化カリウム5wt%を含む35℃の
水溶液(ヨウ素吸着浴)中に15秒間浸漬し水洗後、次
に、ホウ酸4wt%、ヨウ化カリウム5wt%、塩化マ
ンガン5wt%を含む70°Cの水溶液(固定浴)中に
30秒間浸漬し、水洗、乾燥を行なった。Add this semi-laminated film to less than 0.3% by weight of iodine.
t%), immersed in an aqueous solution (iodine adsorption bath) at 35°C containing 5 wt% potassium iodide for 15 seconds and washed with water, then 4 wt% boric acid, 5 wt% potassium iodide, and 5 wt% manganese chloride. The sample was immersed for 30 seconds in a 70°C aqueous solution (fixed bath) containing water, washed with water, and dried.
次いて、緊張状態で150°C1分間の加熱処理を行な
った後、PVAサイドにCTAフィルムをラミネートし
て偏光フィルム(PVAフィルム1g当たりのマンガン
含有量 約15mg)を得た。Next, after heat treatment at 150° C. for 1 minute under tension, a CTA film was laminated on the PVA side to obtain a polarizing film (manganese content: about 15 mg per 1 g of PVA film).
このフィルムの初期性能および温熱処理(75℃、90
%RH18時間)後の性能変化は、第1表の通りであっ
た。Initial performance and thermal treatment (75°C, 90°C) of this film
The performance changes after %RH (18 hours) were as shown in Table 1.
実施例2
ヨウ素吸着浴および固定浴のヨウ化カリウム濃度をそれ
ぞれ10wt%とした以外は実施例1と同様の処理を行
ない偏光フィルム(PVAフィルム1g当たりのマンガ
ン含有量 約12mg)を得た。Example 2 A polarizing film (manganese content: about 12 mg per 1 g of PVA film) was obtained by carrying out the same treatment as in Example 1, except that the potassium iodide concentrations in the iodine adsorption bath and the fixed bath were each 10 wt%.
比較例1
固定浴に塩化マンガンを用いなかった以外は実施例1と
同様の処理を行ない偏光フィルムを得た。Comparative Example 1 A polarizing film was obtained by carrying out the same treatment as in Example 1 except that manganese chloride was not used in the fixing bath.
比較例2
固定浴の塩化マンガンの代わりに塩化コバルト5wt%
を用いた以外は実施例1と同様の処理を行ない偏光フィ
ルムを得た。Comparative Example 2 Cobalt chloride 5wt% instead of manganese chloride in fixed bath
A polarizing film was obtained by carrying out the same treatment as in Example 1 except that .
比較例3
固定浴の塩化マンガンの代わりに塩化ニッケル5wt%
を用いた以外は実施例1と同様の処理を行ない偏光フィ
ルムを得た。Comparative Example 3 5wt% nickel chloride instead of manganese chloride in fixed bath
A polarizing film was obtained by carrying out the same treatment as in Example 1 except that .
[発明の効果]
本発明の偏光フィルムは、光学特性(透過率、偏光度)
に優れるとともに、耐湿熱耐久性に優れる。このため、
厳しい使用環境が要求される用途から一般の家庭で用い
るワープロなどに至るまで、すべての液晶表示装置、各
種光学機器、サングラス、自動車のフロントガラス、窓
などの種々の分野で使用することができる。[Effect of the invention] The polarizing film of the invention has optical properties (transmittance, degree of polarization)
It has excellent heat and humidity resistance. For this reason,
It can be used in a variety of fields, from applications that require harsh usage environments to word processors used in general homes, as well as all types of liquid crystal display devices, various optical devices, sunglasses, automobile windshields, and windows.
特許出願人 東し株式会社Patent applicant: Toshi Co., Ltd.
Claims (3)
ール系フィルムにおいて、マンガン化合物を含有するこ
とを特徴とする偏光フィルム。(1) A polarizing film comprising a manganese compound, which is a polyvinyl alcohol film formed by adsorbing and orienting iodine.
ンガン塩の少なくとも1種である請求項(1)記載の偏
光フィルム。(2) The polarizing film according to claim (1), wherein the manganese compound is at least one of manganese halides and inorganic manganese salts.
ム1g当たり0.05〜50mgである請求項(1)記
載の偏光フィルム。(3) The polarizing film according to claim 1, wherein the manganese content is 0.05 to 50 mg per 1 g of the polyvinyl alcohol film.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5465788A JPH01227101A (en) | 1988-03-08 | 1988-03-08 | Polarizing film |
PCT/JP1989/000237 WO1989008857A1 (en) | 1988-03-08 | 1989-03-06 | Polarizing film |
EP89903267A EP0366803B1 (en) | 1988-03-08 | 1989-03-06 | Polarizing film |
DE68921139T DE68921139T2 (en) | 1988-03-08 | 1989-03-06 | POLARIZATION FILTER. |
AT89903267T ATE118621T1 (en) | 1988-03-08 | 1989-03-06 | POLARIZATION FILTER. |
KR1019890701992A KR900700898A (en) | 1988-03-08 | 1989-03-06 | Polarizing film |
US07/448,656 US5071234A (en) | 1988-03-08 | 1989-12-06 | Polarization film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5465788A JPH01227101A (en) | 1988-03-08 | 1988-03-08 | Polarizing film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01227101A true JPH01227101A (en) | 1989-09-11 |
JPH0565842B2 JPH0565842B2 (en) | 1993-09-20 |
Family
ID=12976857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5465788A Granted JPH01227101A (en) | 1988-03-08 | 1988-03-08 | Polarizing film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01227101A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666932A1 (en) * | 2003-09-19 | 2006-06-07 | Nippon Kayaku Kabushiki Kaisha | Polarizing film, polarizing plate and liquid crystal display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223704A (en) * | 1986-03-25 | 1987-10-01 | Sumitomo Chem Co Ltd | Production of polarizing film |
JPS62226104A (en) * | 1986-03-27 | 1987-10-05 | Sumitomo Chem Co Ltd | Production of polarizing film |
JPS62240905A (en) * | 1986-04-14 | 1987-10-21 | Mitsubishi Gas Chem Co Inc | Polarizing film |
JPS63311203A (en) * | 1987-06-12 | 1988-12-20 | Mitsubishi Gas Chem Co Inc | Production of polarizing film |
-
1988
- 1988-03-08 JP JP5465788A patent/JPH01227101A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62223704A (en) * | 1986-03-25 | 1987-10-01 | Sumitomo Chem Co Ltd | Production of polarizing film |
JPS62226104A (en) * | 1986-03-27 | 1987-10-05 | Sumitomo Chem Co Ltd | Production of polarizing film |
JPS62240905A (en) * | 1986-04-14 | 1987-10-21 | Mitsubishi Gas Chem Co Inc | Polarizing film |
JPS63311203A (en) * | 1987-06-12 | 1988-12-20 | Mitsubishi Gas Chem Co Inc | Production of polarizing film |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1666932A1 (en) * | 2003-09-19 | 2006-06-07 | Nippon Kayaku Kabushiki Kaisha | Polarizing film, polarizing plate and liquid crystal display device |
EP1666932A4 (en) * | 2003-09-19 | 2007-10-24 | Nippon Kayaku Kk | Polarizing film, polarizing plate and liquid crystal display device |
Also Published As
Publication number | Publication date |
---|---|
JPH0565842B2 (en) | 1993-09-20 |
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