JPH0651121A - Polarizing plate and elliptically polarizing plate - Google Patents
Polarizing plate and elliptically polarizing plateInfo
- Publication number
- JPH0651121A JPH0651121A JP4223377A JP22337792A JPH0651121A JP H0651121 A JPH0651121 A JP H0651121A JP 4223377 A JP4223377 A JP 4223377A JP 22337792 A JP22337792 A JP 22337792A JP H0651121 A JPH0651121 A JP H0651121A
- Authority
- JP
- Japan
- Prior art keywords
- film
- polarizing plate
- layer
- transparent
- adhesive layer
- 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.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、静電気や電磁波のシー
ルド性に優れる偏光板ないし楕円偏光板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing plate or an elliptically polarizing plate which is excellent in shielding static electricity and electromagnetic waves.
【０００２】[0002]
【従来の技術】従来、偏光板や楕円偏光板に粘着層を介
しセパレータや表面保護フィルムを接着して流通形態等
としたものが知られていた。セパレータは、偏光板等を
液晶表示装置などに接着固定するための粘着層を接着に
供するまでの間、被覆保護しておくためのものである。
表面保護フィルムは、偏光板等の流通過程や液晶表示装
置の組立て工程などにおける損傷等の防止のために偏光
板等の表面を被覆保護しておくためのものである。従っ
ていずれの場合にも、実用時には剥離除去されるもので
ある。なお、表面保護フィルムの場合には粘着層と共に
偏光板等より剥離除去される。よって表面保護フィルム
は、支持フィルムに粘着層を付設した形態が通例であ
る。2. Description of the Related Art Conventionally, it has been known that a separator or a surface protective film is adhered to a polarizing plate or an elliptically polarizing plate via an adhesive layer to form a distribution form. The separator is for covering and protecting the pressure-sensitive adhesive layer for adhering and fixing the polarizing plate and the like to the liquid crystal display device and the like until the adhesive layer is provided for adhesion.
The surface protective film is for covering and protecting the surface of the polarizing plate or the like in order to prevent damage or the like in the distribution process of the polarizing plate or the like, the assembly process of the liquid crystal display device, or the like. Therefore, in any case, it is peeled and removed in practical use. In the case of the surface protective film, it is peeled off from the polarizing plate together with the adhesive layer. Therefore, in the surface protection film, it is usual that the support film is provided with an adhesive layer.
【０００３】しかしながら、セパレータや表面保護フィ
ルムの剥離除去により粘着面や偏光板等の表面にゴミ等
が付着して汚染し、外観不良を誘発して歩留まりを低下
させる問題点があった。またセパレータを剥離除去した
粘着層を介して偏光板等を接着する際や、偏光板等より
表面保護フィルムを剥離除去した際に、液晶表示装置等
に異常表示が発生して正常な表示が実現されなかった
り、周辺回路素子が静電破壊される問題点もあった。さ
らに、稼働中に液晶表示装置が誤動作したり、液晶表示
付ラジオ等ではノイズが発生するなどの問題点もあっ
た。However, when the separator or the surface protective film is peeled off, dust or the like adheres to and contaminates the surface of the adhesive surface, the polarizing plate, etc., causing a poor appearance and lowering the yield. In addition, when a polarizing plate or the like is bonded via an adhesive layer from which the separator has been peeled off, or when the surface protective film is peeled off from the polarizing plate or the like, an abnormal display occurs on the liquid crystal display device, etc., and normal display is realized. There is also a problem in that the peripheral circuit elements are not electrostatically destroyed. Further, there are problems that the liquid crystal display device malfunctions during operation, and noise occurs in a radio with a liquid crystal display and the like.
【０００４】[0004]
【発明が解決しようとする課題】本発明者らは前記問題
点を克服すべく鋭意研究を重ねる中で、上記した汚染問
題、異常表示や素子破壊問題、誤動作やノイズ問題は、
セパレータ等を剥離除去する際の静電気、外界や装置内
部からの電磁波が主因であることを究明した。従って本
発明は、光学特性等を損なうことなく静電気や電磁波に
対処できる偏光板ないし楕円偏光板の開発を課題とす
る。While the inventors of the present invention have conducted extensive studies to overcome the above-mentioned problems, the above-mentioned pollution problem, abnormal display and element destruction problem, malfunction and noise problem
It was clarified that the main causes were static electricity when removing the separator and the like, and electromagnetic waves from the outside and inside the device. Therefore, an object of the present invention is to develop a polarizing plate or an elliptical polarizing plate capable of coping with static electricity and electromagnetic waves without impairing optical characteristics and the like.
【０００５】[0005]
【課題を解決するための手段】本発明は、透明導電層を
有する偏光板に粘着層を介して帯電防止フィルムを接着
したことを特徴とする偏光板、及び透明導電層を有する
偏光板と位相差板の積層体に粘着層を介して帯電防止フ
ィルムを接着したことを特徴とする楕円偏光板を提供す
るものである。The present invention provides a polarizing plate comprising a polarizing plate having a transparent conductive layer and an antistatic film bonded thereto via an adhesive layer, and a polarizing plate having a transparent conductive layer. The present invention provides an elliptically polarizing plate comprising an antistatic film bonded to a laminate of retardation plates via an adhesive layer.
【０００６】[0006]
【作用】透明導電層を有する偏光板ないし楕円偏光板及
び帯電防止フィルムの使用により、静電気や電磁波をシ
ールドできて静電気によるゴミ等の付着汚染、液晶配向
の乱れ等による異常表示、周辺回路素子の静電破壊、電
磁波による装置の誤動作、ラジオ等のノイズ発生などを
防止することができる。By using a polarizing plate or elliptically polarizing plate having a transparent conductive layer and an antistatic film, static electricity and electromagnetic waves can be shielded, dust and other contaminants adhered and contaminated by static electricity, abnormal display due to disordered liquid crystal alignment, and peripheral circuit elements. It is possible to prevent electrostatic breakdown, malfunction of the device due to electromagnetic waves, noise generation of radio and the like.
【０００７】[0007]
【実施例】本発明の偏光板は、透明導電層を有する偏光
板に粘着層を介して帯電防止フィルムを接着したもので
ある。その例を図１、図２に示した。また本発明の楕円
偏光板は、透明導電層を有する偏光板と位相差板の積層
体に粘着層を介して帯電防止フィルムを接着したもので
ある。その例を図３に示した。１が表面保護フィルム
（帯電防止フィルム）、２が偏光板、３が透明導電層、
４が粘着層、５がセパレータ（帯電防止フィルム）、６
が位相差板である。EXAMPLES The polarizing plate of the present invention is obtained by adhering an antistatic film to a polarizing plate having a transparent conductive layer via an adhesive layer. Examples thereof are shown in FIGS. 1 and 2. The elliptically polarizing plate of the present invention is obtained by adhering an antistatic film to a laminate of a polarizing plate having a transparent conductive layer and a retardation plate via an adhesive layer. An example thereof is shown in FIG. 1 is a surface protective film (antistatic film), 2 is a polarizing plate, 3 is a transparent conductive layer,
4 is an adhesive layer, 5 is a separator (antistatic film), 6
Is a retardation plate.
【０００８】図１に例示のものは、偏光フィルム２２の
片面に透明フィルム２１を、他面に透明導電層３を付設
した透明フィルム２３をそれぞれ透明な接着剤を介し接
着してなる偏光板２の片面に、帯電防止層１１と支持フ
ィルム１２と粘着層１３からなる表面保護フィルム１を
接着し、他面に支持フィルム５１と帯電防止層５２から
なるセパレータ５をそれに仮設した粘着層４を介し接着
して形成したものである。In the example shown in FIG. 1, a polarizing film 2 in which a transparent film 21 is adhered to one surface of a polarizing film 22 and a transparent film 23 having a transparent conductive layer 3 attached to the other surface thereof are adhered via transparent adhesives, respectively. The surface protective film 1 composed of the antistatic layer 11, the support film 12 and the adhesive layer 13 is adhered to one surface of the above, and the separator 5 composed of the support film 51 and the antistatic layer 52 is adhered to the other surface via the adhesive layer 4 which is temporarily provided thereon. It is formed by bonding.
【０００９】図２に例示のものは、偏光フィルム２２の
両面に透明な接着剤を介して透明フィルム２１，２３を
接着したものの片面に、透明導電層３を付設した二層目
の透明フィルム２４を透明な粘着層２５を介し接着して
なる偏光板２を用いて前記実施例に準じて形成したもの
である。In the example shown in FIG. 2, the transparent film 21 and the transparent film 21 are adhered to both sides of the polarizing film 22 with transparent adhesives, and the transparent conductive layer 3 is attached to one surface of the second transparent film 24. Is formed according to the above-mentioned embodiment using the polarizing plate 2 obtained by adhering the above through the transparent adhesive layer 25.
【００１０】図３に例示のものは、透明導電層３を設け
た偏光板２の片面に、透明な粘着層６１を介し位相差板
６を接着して楕円偏光板とし、それを用いて図１の実施
例に準じ形成したものである。In the example shown in FIG. 3, the retardation plate 6 is adhered to one surface of the polarizing plate 2 provided with the transparent conductive layer 3 through the transparent adhesive layer 61 to form an elliptically polarizing plate. It is formed according to the first embodiment.
【００１１】本発明においては、透明導電層を有する偏
光板ないし楕円偏光板が用いられる。楕円偏光板は、偏
光板に位相差板を積層したものである。偏光板、位相差
板については適宜なものを用いてよい。一般には、偏光
フィルムからなる偏光板、延伸フィルムからなる位相差
板が用いられる。In the present invention, a polarizing plate or an elliptically polarizing plate having a transparent conductive layer is used. The elliptically polarizing plate is formed by laminating a retardation plate on a polarizing plate. Appropriate ones may be used for the polarizing plate and the retardation plate. Generally, a polarizing plate made of a polarizing film and a retardation plate made of a stretched film are used.
【００１２】偏光フィルムの具体例としては、ポリビニ
ルアルコール系フィルム、部分ホルマール化ポリビニル
アルコール系フィルム、エチレン・酢酸ビニル共重合体
系部分ケン化フィルムの如き親水性高分子フィルムにヨ
ウ素及び／又は二色性染料を吸着させて延伸したもの、
ポリビニルアルコールの脱水処理物やポリ塩化ビニルの
脱塩酸処理物の如きポリエン配向フィルムなどがあげら
れる。偏光フィルムの厚さは通例５〜８０μmである
が、これに限定されない。Specific examples of the polarizing film include a hydrophilic polymer film such as a polyvinyl alcohol film, a partially formalized polyvinyl alcohol film, an ethylene / vinyl acetate copolymer partially saponified film, and iodine and / or dichroism. Stretched by adsorbing dye,
Examples thereof include polyene oriented films such as polyvinyl alcohol dehydration products and polyvinyl chloride dehydrochlorination products. The polarizing film typically has a thickness of 5 to 80 μm, but is not limited thereto.
【００１３】偏光フィルムはそのまま偏光板として用い
うるし、その片側又は両側に透明保護層を設けた偏光板
としても用いうる。透明保護層は、補強や水分の侵入防
止等による偏光フィルムの耐久性の向上などを目的とす
るものであり、従ってポリエン配向系偏光フィルムの如
く、充分な強度等を有する偏光フィルムでは省略できる
場合もあり、必須のものではない。なお透明保護層は、
前記実施例の透明フィルムより明らかな如く偏光フィル
ムの片側又は両側において２層以上設けられていてもよ
い。The polarizing film can be used as a polarizing plate as it is or as a polarizing plate having a transparent protective layer provided on one side or both sides thereof. The transparent protective layer is for the purpose of improving the durability of the polarizing film by reinforcing or preventing the intrusion of moisture, and thus can be omitted in a polarizing film having sufficient strength etc., such as a polyene oriented polarizing film. Yes, it is not mandatory. The transparent protective layer is
As is clear from the transparent film of the above embodiment, two or more layers may be provided on one side or both sides of the polarizing film.
【００１４】透明保護層の形成材としては、透明性、機
械的強度、熱安定性、水分遮蔽性などに優れるものが好
ましく用いうる。その代表例としては、ポリエステル系
樹脂、ポリエーテルサルホン系樹脂、ポリカーボネート
系樹脂、ポリアミド系樹脂、ポリイミド系樹脂、ポリオ
レフィン系樹脂、アクリル系樹脂、アセテート系樹脂の
如きポリマーなどがあげられる。As the material for forming the transparent protective layer, those having excellent transparency, mechanical strength, thermal stability, moisture shielding property and the like can be preferably used. Typical examples thereof include polymers such as polyester resins, polyether sulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, acrylic resins and acetate resins.
【００１５】透明保護層の形成は、例えば偏光フィルム
にポリマー溶液を塗工する方式などによっても行いうる
が、偏光板の品質の安定性等の点よりはキャスティング
方式等で透明フィルムを形成し、それを偏光フィルムに
接着する方式が好ましい。後者のフィルムとして適用す
る方式は、前記実施例の如く透明導電層の付設ベースと
して利用できる利点などもある。透明保護層の厚さは通
例、５〜５００μm、就中１０〜３００μmとされるが、
これに限定されない。なお通例、透明保護層は光学歪が
可及的に少ないことが好ましいが、一軸や二軸等で処理
した延伸フィルムなども用いることができ、その場合、
楕円偏光板とするための位相差フィルムを兼ねさせるこ
ともできる。The transparent protective layer may be formed, for example, by coating a polarizing film with a polymer solution, but from the viewpoint of stability of the quality of the polarizing plate, the transparent film is formed by the casting method or the like. A method of adhering it to the polarizing film is preferable. The latter method applied as a film has an advantage that it can be used as an attached base of a transparent conductive layer as in the above-mentioned embodiment. The thickness of the transparent protective layer is usually 5 to 500 μm, especially 10 to 300 μm,
It is not limited to this. Note that, usually, the transparent protective layer preferably has as little optical strain as possible, but a stretched film or the like treated with uniaxial or biaxial can also be used, in which case,
The elliptically polarizing plate can also serve as a retardation film.
【００１６】楕円偏光板を得るための位相差フィルムと
しては前記の如く、例えばポリカーボネート、ポリビニ
ルアルコール、ポリスチレン、ポリメチルメタクリレー
トの如き適宜な透明プラスチックフィルムを延伸処理し
てなる複屈折性フィルムなどがあげられる。位相差板
は、２種以上の位相差フィルムを積層して位相差等の光
学特性を制御したものとして形成することもできる。As the retardation film for obtaining the elliptically polarizing plate, a birefringent film obtained by stretching an appropriate transparent plastic film such as polycarbonate, polyvinyl alcohol, polystyrene and polymethylmethacrylate as mentioned above can be mentioned. To be The retardation plate can be formed by laminating two or more kinds of retardation films and controlling optical properties such as retardation.
【００１７】透明導電層を有する偏光板ないし楕円偏光
板の形成は、例えば透明導電塗料の塗工方式等の適宜な
方式で行うことができる。好ましい方式は例えば、真空
蒸着方式、スパッタリング方式、イオンプレーティング
方式、化学蒸着方式、スプレー熱分解方式、化学メッキ
方式、電気メッキ方式等や、それらを適宜に組合せた方
式などによる薄膜形成方式である。The polarizing plate or the elliptically polarizing plate having the transparent conductive layer can be formed by an appropriate method such as a coating method of a transparent conductive paint. A preferable method is, for example, a thin film forming method such as a vacuum vapor deposition method, a sputtering method, an ion plating method, a chemical vapor deposition method, a spray pyrolysis method, a chemical plating method, an electroplating method, or a combination thereof. .
【００１８】透明導電層は１層又は２層以上の任意な層
数を設けることができ、その位置も例えば偏光子や透明
保護層あるいは位相差板の外表面、透明保護層と透明保
護層あるいは位相差板との界面、偏光子と透明保護層と
粘着層あるいは位相差板との適宜な界面など、任意であ
る。The transparent conductive layer may be provided in any number of layers of one layer or two or more layers, and the position thereof may be, for example, the outer surface of the polarizer, the transparent protective layer or the retardation film, the transparent protective layer and the transparent protective layer, or The interface with the retardation plate, the appropriate interface between the polarizer, the transparent protective layer, and the adhesive layer or the retardation plate is arbitrary.
【００１９】透明導電層の形成材としては、透明性に優
れものが好ましく用いられる。その例としては、酸化ス
ズ、酸化インジウム、酸化カドミウム、酸化チタン、金
属インジウム、金属スズ、金、銀、白金、パラジウム、
銅、アルミニウム、ニッケル、クロム、チタン、鉄、コ
バルト、ヨウ化銅、それらの混合物や合金などがあげら
れる。As a material for forming the transparent conductive layer, a material having excellent transparency is preferably used. Examples thereof include tin oxide, indium oxide, cadmium oxide, titanium oxide, metal indium, metal tin, gold, silver, platinum, palladium,
Examples thereof include copper, aluminum, nickel, chromium, titanium, iron, cobalt, copper iodide, and a mixture or alloy thereof.
【００２０】透明導電層の厚さは、使用目的等に応じて
適宜に決定してよい。一般には、酸化物やその混合物で
形成する場合、８０〜５０００Å、金属（合金を含む）
で形成する場合、５０〜４００Åの厚さとすることが好
ましい。その厚さが薄過ぎると膜構造上の欠陥で静電気
や電磁波に対するシールド性が低下しやすく、厚過ぎる
と可視光透過率が低下して好ましくない。透明導電層の
表面抵抗としては、静電気シールド用の場合、１０9Ω
／□以下、電磁波シールド用の場合、１０3Ω／□以下
であることが好ましい。The thickness of the transparent conductive layer may be appropriately determined depending on the purpose of use and the like. Generally, when formed of oxides or mixtures thereof, 80-5000Å, metals (including alloys)
When it is formed by, it is preferable that the thickness is 50 to 400 Å. If the thickness is too thin, the shielding property against static electricity and electromagnetic waves tends to be deteriorated due to defects in the film structure, and if it is too thick, the visible light transmittance is lowered, which is not preferable. The surface resistance of the transparent conductive layer is 10 9 Ω for electrostatic shield.
/ □ or less, and for electromagnetic wave shielding, it is preferably 10 3 Ω / □ or less.
【００２１】なお偏光板ないし楕円偏光板には、その偏
光子や透明保護層、位相差板等の構成部材を紫外線吸収
剤、例えばサリチル酸エステル系化合物、ベンゾフェノ
ール系化合物、ベンゾトリアゾール系化合物、シアノア
クリレート系化合物、ニッケル錯塩系化合物等で処理す
る方式などにより紫外線吸収能をもたせることもでき
る。In the polarizing plate or the elliptically polarizing plate, constituent members such as a polarizer, a transparent protective layer, and a retardation plate are UV absorbers such as salicylic acid ester compounds, benzophenol compounds, benzotriazole compounds, and cyano compounds. It is also possible to impart ultraviolet absorption ability by a method of treating with an acrylate compound, a nickel complex salt compound or the like.
【００２２】本発明において偏光板ないし楕円偏光板に
粘着層を介して接着される帯電防止フィルムは、表面保
護フィルム又はセパレータとして形成される。表面保護
フィルムは、例えば図例の如く帯電防止フィルムからな
る支持フィルム１２に粘着層１３を設けたものとして形
成することができる。セパレータは、例えば帯電防止フ
ィルムからなる支持フィルムを剥離剤で処理したものと
して形成することができる。In the present invention, the antistatic film adhered to the polarizing plate or the elliptically polarizing plate via the adhesive layer is formed as a surface protective film or a separator. The surface protection film can be formed, for example, as a support film 12 made of an antistatic film provided with an adhesive layer 13 as illustrated. The separator can be formed, for example, by treating a support film made of an antistatic film with a release agent.
【００２３】前記の支持フィルムには適宜なプラスチッ
クフィルムを用いうる。なかでも、表面保護フィルムの
場合には、例えばポリエチレンとエチレン・酢酸ビニル
系共重合体との二層押出し成形フィルム、ポリエチレン
フィルム、ポリエステルフィルムの如く、偏光板等との
接着性、剥離性、耐汚染性、加工性、耐候性などに優れ
るものが好ましく用いうる。セパレータの場合には、ポ
リエステルフィルムの如く剥離性、作業性、クリーン性
などに優れるものが好ましく用いうる。なお剥離剤とし
ては、シリコーン系のものが好ましい。An appropriate plastic film can be used as the support film. Among them, in the case of a surface protective film, for example, a two-layer extrusion molded film of polyethylene and an ethylene / vinyl acetate copolymer, a polyethylene film, a polyester film, adhesion to a polarizing plate, peelability, resistance to Those having excellent stain resistance, processability, weather resistance and the like can be preferably used. In the case of a separator, a polyester film having excellent peelability, workability, cleanliness and the like can be preferably used. The release agent is preferably silicone-based.
【００２４】帯電防止フィルムの形成は、界面活性剤、
導電性カーボン、金属粉末等の帯電防止剤をプラスチッ
クに配合してフィルムに成形する方式、フィルムに界面
活性剤や導電性樹脂等をコーティングする方式、フィル
ムに金属や合金、金属酸化物等の導電性物質を蒸着する
方式など、適宜な方式で行うことができる。帯電防止フ
ィルムは、その表面抵抗が低いほど好ましく、就中１０
14Ω／cm2以下、特に１０13Ω／cm2以下が好ましい。The antistatic film is formed by using a surfactant,
A method of blending antistatic agents such as conductive carbon and metal powder into plastics to form a film, a method of coating a film with a surfactant or a conductive resin, a method of conducting a film of metal, alloy, metal oxide, etc. It can be performed by an appropriate method such as a method of depositing a volatile substance. The lower the surface resistance of the antistatic film is, the more preferable.
It is preferably 14 Ω / cm 2 or less, and particularly preferably 10 13 Ω / cm 2 or less.
【００２５】前記の界面活性剤としては、例えばカルボ
ン酸系化合物、スルホン酸系化合物、ホスフェート塩の
如きアニオン系ないし両性系のもの、アミン系化合物、
第四級アンモニウム塩の如きカチオン系のもの、脂肪酸
多価アルコールエステル系化合物、ポリオキシエチレン
付加物の如き非イオン系のもの、ポリアクリル酸誘導体
の如き高分子系のものなどがあげられる。また導電性樹
脂としては、スズ・アンチモン系フィラー、酸化インジ
ウム系フィラーの如き導電性フィラーを樹脂中に分散さ
せたものなどがあげられる。Examples of the above-mentioned surfactants include carboxylic acid compounds, sulfonic acid compounds, anionic or amphoteric compounds such as phosphate salts, amine compounds,
Examples thereof include cationic compounds such as quaternary ammonium salts, fatty acid polyhydric alcohol ester compounds, nonionic compounds such as polyoxyethylene adducts, and polymeric compounds such as polyacrylic acid derivatives. Examples of the conductive resin include those obtained by dispersing a conductive filler such as tin / antimony-based filler and indium oxide-based filler in the resin.
【００２６】なお偏光子と透明保護層、位相差板との接
着などには、例えば透明な接着剤ないし粘着剤等が用い
られる。その接着剤等の種類については特に限定はない
が、偏光子や透明保護層、位相差板等の光学特性の変化
防止の点より、硬化や乾燥の際に高温のプロセスを要し
ないものが好ましく、長時間の硬化処理や乾燥時間を要
しないものが望ましい。なお表面保護フィルムや偏光板
等に設ける接着用ないし固定用の粘着層としては、アク
リル系粘着剤層の如く接着性、加工性、耐久性等に優れ
るものが好ましい。For adhesion of the polarizer to the transparent protective layer and the retardation plate, for example, a transparent adhesive or pressure sensitive adhesive is used. The type of the adhesive is not particularly limited, but those that do not require a high temperature process during curing or drying are preferable from the viewpoint of preventing changes in optical properties of the polarizer, the transparent protective layer, the retardation plate, etc. Those that do not require a long curing process or drying time are desirable. The adhesive layer for adhesion or fixing provided on the surface protective film, the polarizing plate, etc. is preferably one having excellent adhesiveness, processability, durability and the like, such as an acrylic adhesive layer.
【００２７】本発明の偏光板ないし楕円偏光板は、例え
ば計器類や電子時計、ＯＡ機器や卓上電子計算機等の液
晶表示装置など、種々の光学系装置に好ましく用いるこ
とができる。The polarizing plate or elliptically polarizing plate of the present invention can be preferably used in various optical system devices such as instruments, electronic timepieces, liquid crystal display devices such as office automation equipment and tabletop electronic calculators.
【００２８】実施例１ 厚さ３０μmのヨウ素・ポリビニルアルコール系偏光フ
ィルムの両面にポリビニルアルコール系接着剤を介して
厚さ５０μmのトリアセチルセルロースフィルムを接着
して透明導電層付の偏光板を得、その透明導電層側にア
クリル系粘着剤を塗布乾燥して粘着層を設けた。なお前
記の透明導電層は、一方のトリアセチルセルロースフィ
ルムの片面にスパッタリング方式で厚さ約１００Åの酸
化インジウム・酸化スズ複合層（重量比；Ｉn2Ｏ3／Ｓn
Ｏ2：９／１）を予め形成することにより付設したもの
であり、その表面抵抗は１０5Ω／□である。次に、厚
さ３８μmのポリエステルフィルムの片面に第四級アン
モニウム塩からなる界面活性剤を塗布して帯電防止層を
形成した表面抵抗が１０9Ω／□の帯電防止フィルムを
用いて、その他面にアクリル系粘着剤又はシリコーン系
剥離剤を塗布乾燥して表面保護フィルム又はセパレータ
を形成し、それを前記の偏光板の両面に粘着層を介して
それぞれ接着し、本発明の偏光板を得た。Example 1 A 50 μm-thick triacetylcellulose film was adhered to both sides of a 30 μm-thick iodine / polyvinyl alcohol-based polarizing film via a polyvinyl alcohol-based adhesive to obtain a polarizing plate with a transparent conductive layer. An acrylic adhesive was applied to the transparent conductive layer side and dried to form an adhesive layer. The transparent conductive layer is formed on one side of one triacetyl cellulose film by a sputtering method with an indium oxide / tin oxide composite layer (weight ratio: In 2 O 3 / Sn) of about 100 Å.
O 2 : 9/1) is attached by forming it beforehand, and its surface resistance is 10 5 Ω / □. Next, a 38 μm-thick polyester film was coated with a surfactant consisting of a quaternary ammonium salt on one surface to form an antistatic layer. An antistatic film with a surface resistance of 10 9 Ω / □ was used, and the other surface was used. Acrylic pressure sensitive adhesive or silicone release agent was applied to and dried to form a surface protective film or a separator, which was adhered to both surfaces of the above polarizing plate via adhesive layers to obtain a polarizing plate of the present invention. .
【００２９】実施例２ 透明導電層付のトリアセチルセルロースフィルムと粘着
層との間に、アクリル系粘着層を介して厚さ５０μmの
延伸ポリカーボネートフィルムからなる位相差板を接着
介在させたほかは実施例１に準じて楕円偏光板を得た。Example 2 Implementation was carried out except that a retardation plate made of a stretched polycarbonate film having a thickness of 50 μm was adhered via an acrylic adhesive layer between the triacetyl cellulose film with a transparent conductive layer and the adhesive layer. An elliptically polarizing plate was obtained according to Example 1.
【００３０】実施例３ トリアセチルセルロースフィルムに透明導電層を設ける
方式に代えて、厚さ３０μmのポリエステルフィルムの
片面にスパッタリング方式で厚さ約６００Åの酸化イン
ジウム・酸化スズ複合層（重量比；Ｉn2Ｏ3／ＳnＯ2：
９／１）からなる表面抵抗が１００Ω／□の透明導電層
を形成し、それをアクリル系粘着層を介して偏光板の表
面保護フィルム接着側に接着したほかは、実施例１に準
じて偏光板を得た。Example 3 Instead of providing a transparent conductive layer on a triacetyl cellulose film, an indium oxide / tin oxide composite layer (weight ratio: In) having a thickness of about 600 Å was sputtered on one side of a polyester film having a thickness of 30 μm. 2 O 3 / SnO 2 :
Polarized light in accordance with Example 1 except that a transparent conductive layer having a surface resistance of 100 Ω / □ consisting of 9/1) was formed and adhered to the surface protective film adhesive side of the polarizing plate via an acrylic adhesive layer. I got a plate.
【００３１】比較例１ 透明導電層と帯電防止層を設けないほかは実施例１に準
じて偏光板を得た。Comparative Example 1 A polarizing plate was obtained in the same manner as in Example 1 except that the transparent conductive layer and the antistatic layer were not provided.
【００３２】比較例２ 帯電防止層を設けないほかは実施例１に準じて偏光板を
得た。Comparative Example 2 A polarizing plate was obtained in the same manner as in Example 1 except that the antistatic layer was not provided.
【００３３】比較例３ 帯電防止層を設けないほかは実施例３に準じて偏光板を
得た。Comparative Example 3 A polarizing plate was obtained in the same manner as in Example 3 except that the antistatic layer was not provided.
【００３４】評価試験 静電気シールド性 実施例、比較例で得た偏光板又は楕円偏光板について、
セパレータ及び表面保護フィルムを手で剥離除去し、そ
の偏光板又は楕円偏光板における表面の静電気量を集電
式電位測定機（春日電気社製、ＫＳ−４７１型）にて測
定した。また、セパレータ剥離後の粘着層におけるゴミ
付着量、及び粘着層を介し液晶表示装置に接着固定した
偏光板等より表面保護フィルムを剥離除去した後の装置
の異常表示を調べた。前記の結果を表１、表２に示し
た。Evaluation Test Electrostatic Shielding Property Regarding the polarizing plates or elliptically polarizing plates obtained in Examples and Comparative Examples,
The separator and the surface protective film were peeled off and removed by hand, and the static electricity amount on the surface of the polarizing plate or the elliptical polarizing plate was measured with a current collector-type potentiometer (Kasuga Denki KS-471 type). Further, the amount of dust adhering to the adhesive layer after the separator was peeled off and the abnormal display of the device after the surface protective film was peeled off from the polarizing plate or the like that was adhesively fixed to the liquid crystal display device via the adhesive layer were examined. The results are shown in Tables 1 and 2.
【００３５】電磁波シールド性 実施例３、比較例１で得た偏光板についてセパレータ及
び表面保護フィルムを剥離除去し、その偏光板又は楕円
偏光板における周波数１０7Hz、１０8Hz又は１０9Hzで
の電界シールド効果を測定した（アドバンテスト社製、
ＴＲ−１７３０１）。また、粘着層を介し液晶表示装置
に接着固定した偏光板等より表面保護フィルムを剥離除
去し、電磁波の存在下における装置の誤動作の頻度を調
べた。前記の結果を表３に示した。Electromagnetic Wave Shielding Property The separator and the surface protective film of the polarizing plate obtained in Example 3 and Comparative Example 1 were peeled and removed, and the polarizing plate or elliptical polarizing plate was operated at a frequency of 10 7 Hz, 10 8 Hz or 10 9 Hz. The electric field shield effect was measured (made by Advantest,
TR-17301). Further, the surface protective film was peeled off from the polarizing plate or the like which was adhesively fixed to the liquid crystal display device via the adhesive layer, and the frequency of malfunction of the device in the presence of electromagnetic waves was examined. The results are shown in Table 3.
【００３６】[0036]
【表１】 [Table 1]
【００３７】[0037]
【表２】 [Table 2]
【００３８】[0038]
【表３】 [Table 3]
【００３９】表１、表２より、実施例の場合には導電層
からのアース処理がなくても静電気の発生を充分に抑制
することができて異常表示を防止できるが、比較例
（２，３）の場合にはアース処理がないと大きい静電気
が発生し、アース処理があっても表面保護フィルムの剥
離帯電で若干の異常表示が発生することがわかる。From Table 1 and Table 2, in the case of the embodiment, the generation of static electricity can be sufficiently suppressed and the abnormal display can be prevented without the grounding treatment from the conductive layer. In the case of 3), it can be seen that a large amount of static electricity is generated without the grounding treatment, and even if the grounding treatment is performed, a slight abnormality is generated due to peeling charge of the surface protective film.
【００４０】[0040]
【発明の効果】本発明によれば、透明導電層の付設に加
えての帯電防止能を有する表面保護フィルムとセパレー
タの使用で、光学特性を損なうことなく静電気や電磁波
をシールドできてゴミ等の静電付着による粘着層の汚
染、液晶の配向乱れ等による異常表示、回路素子の静電
破壊、電磁波ノイズによる装置の誤動作、ラジオ等のノ
イズ発生などを有効に防止できる偏光板ないし楕円偏光
板を得ることができる。According to the present invention, in addition to the provision of the transparent conductive layer, the use of the surface protective film having the antistatic ability and the separator can shield static electricity and electromagnetic waves without deteriorating the optical characteristics and prevent dust and the like. Polarizing plate or elliptical polarizing plate that can effectively prevent contamination of the adhesive layer due to electrostatic adhesion, abnormal display due to liquid crystal orientation disorder, electrostatic breakdown of circuit elements, device malfunction due to electromagnetic wave noise, noise generation of radio etc. Obtainable.
【図１】偏光板例の断面図。FIG. 1 is a sectional view of an example of a polarizing plate.
【図２】他の偏光板例の断面図。FIG. 2 is a cross-sectional view of another polarizing plate example.
【図３】楕円偏光板例の断面図。FIG. 3 is a sectional view of an example of an elliptically polarizing plate.
【符号の説明】 １：表面保護フィルム（帯電防止フィルム） １１：帯電防止層 １２：支持フィルム １３：粘
着層 ２：偏光板 ２１，２３，２４：透明保護層 ２２：偏光フィルム ３：透明導電層 ４：偏光板等の接着固定用の粘着層 ５：セパレータ（帯電防止フィルム） ５１：支持フィルム ５２：帯電防止層 ６：位相差板[Explanation of reference symbols] 1: Surface protective film (antistatic film) 11: Antistatic layer 12: Support film 13: Adhesive layer 2: Polarizing plates 21, 23, 24: Transparent protective layer 22: Polarizing film 3: Transparent conductive layer 4: Adhesive layer for fixing adhesives such as polarizing plates 5: Separator (antistatic film) 51: Support film 52: Antistatic layer 6: Phase difference plate
Claims (2)
して帯電防止フィルムを接着したことを特徴とする偏光
板。1. A polarizing plate comprising an antistatic film bonded to a polarizing plate having a transparent conductive layer via an adhesive layer.
積層体に粘着層を介して帯電防止フィルムを接着したこ
とを特徴とする楕円偏光板。2. An elliptically polarizing plate comprising an antistatic film bonded to a laminate of a polarizing plate having a transparent conductive layer and a retardation plate via an adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4223377A JPH0651121A (en) | 1992-07-29 | 1992-07-29 | Polarizing plate and elliptically polarizing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4223377A JPH0651121A (en) | 1992-07-29 | 1992-07-29 | Polarizing plate and elliptically polarizing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0651121A true JPH0651121A (en) | 1994-02-25 |
Family
ID=16797197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4223377A Pending JPH0651121A (en) | 1992-07-29 | 1992-07-29 | Polarizing plate and elliptically polarizing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0651121A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867220A (en) * | 1987-03-30 | 1989-09-19 | Ohi Seisakusho Co., Ltd. | Sunshade assembly of motor vehicle |
| JPH07261171A (en) * | 1994-03-24 | 1995-10-13 | Toppan Printing Co Ltd | Reflection type liquid crystal display device |
| JPH0894838A (en) * | 1994-09-29 | 1996-04-12 | Fuji Photo Film Co Ltd | Elliptic polarizing plate and liquid crystal display device |
| JPH08301633A (en) * | 1995-05-10 | 1996-11-19 | Hitachi Ltd | Liquid crystal display device and manufacturing method thereof |
| JPH10160920A (en) * | 1996-12-02 | 1998-06-19 | Dainippon Printing Co Ltd | Color filter and its production |
| JPH11337734A (en) * | 1998-05-29 | 1999-12-10 | Nec Corp | Conductive polarizing plate |
| JP2000356715A (en) * | 1999-04-13 | 2000-12-26 | Lg Philips Lcd Co Ltd | Polalizer integrated with transparent conductive film, touch panel integrated with the polarizer and flat panel display integrated with the touch panel |
| JP2001083307A (en) * | 1999-09-13 | 2001-03-30 | Nitto Denko Corp | Tacky adhesive type optical member |
| JP2003307607A (en) * | 2002-04-17 | 2003-10-31 | Nitto Denko Corp | Anisotropic phase separation structural body, film and anisotropic phase separation structure using the anisotropic phase separation structural body, and display device with the film stuck thereto |
| KR100494704B1 (en) * | 2001-12-31 | 2005-06-13 | 비오이 하이디스 테크놀로지 주식회사 | Conductive polarizer of liquid crystal display device |
| EP1582573A2 (en) | 2004-03-08 | 2005-10-05 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and surface protecting film |
| US7491758B2 (en) | 2004-06-01 | 2009-02-17 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and surface protecting film |
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| JP2009229521A (en) * | 2008-03-19 | 2009-10-08 | Fujifilm Corp | Polarizing plate, liquid crystal display, and manufacturing method for liquid crystal display |
| WO2010064551A1 (en) | 2008-12-05 | 2010-06-10 | 株式会社クラレ | Pressure-sensitive adhesive composition for optical film |
| US7799853B2 (en) | 2005-09-05 | 2010-09-21 | Nitto Denko Corporation | Adhesive composition, adhesive sheet, and surface protective film |
| US7842742B2 (en) | 2004-07-26 | 2010-11-30 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film |
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Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4867220A (en) * | 1987-03-30 | 1989-09-19 | Ohi Seisakusho Co., Ltd. | Sunshade assembly of motor vehicle |
| JPH07261171A (en) * | 1994-03-24 | 1995-10-13 | Toppan Printing Co Ltd | Reflection type liquid crystal display device |
| JPH0894838A (en) * | 1994-09-29 | 1996-04-12 | Fuji Photo Film Co Ltd | Elliptic polarizing plate and liquid crystal display device |
| JPH08301633A (en) * | 1995-05-10 | 1996-11-19 | Hitachi Ltd | Liquid crystal display device and manufacturing method thereof |
| JPH10160920A (en) * | 1996-12-02 | 1998-06-19 | Dainippon Printing Co Ltd | Color filter and its production |
| JPH11337734A (en) * | 1998-05-29 | 1999-12-10 | Nec Corp | Conductive polarizing plate |
| JP2000356715A (en) * | 1999-04-13 | 2000-12-26 | Lg Philips Lcd Co Ltd | Polalizer integrated with transparent conductive film, touch panel integrated with the polarizer and flat panel display integrated with the touch panel |
| US7508461B2 (en) | 1999-04-13 | 2009-03-24 | Lg Display Co., Ltd. | Polarizer integrated with transparent conductive film, a touch panel integrated with the polarizer and a flat panel display integrated with the touch panel |
| US6765629B1 (en) | 1999-04-13 | 2004-07-20 | Lg. Philips Lcd Co., Ltd. | Polarizer integrated with transparent conductive film, a touch panel integrated with the polarizer and a flat panel display integrated with the touch panel |
| US7705923B2 (en) | 1999-04-13 | 2010-04-27 | Lg Display Co., Ltd. | Polarizer integrated with transparent conductive film, a touch panel integrated with the polarizer and a flat panel display integrated with the touch panel |
| JP2001083307A (en) * | 1999-09-13 | 2001-03-30 | Nitto Denko Corp | Tacky adhesive type optical member |
| KR100494704B1 (en) * | 2001-12-31 | 2005-06-13 | 비오이 하이디스 테크놀로지 주식회사 | Conductive polarizer of liquid crystal display device |
| JP2003307607A (en) * | 2002-04-17 | 2003-10-31 | Nitto Denko Corp | Anisotropic phase separation structural body, film and anisotropic phase separation structure using the anisotropic phase separation structural body, and display device with the film stuck thereto |
| EP1582573A2 (en) | 2004-03-08 | 2005-10-05 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and surface protecting film |
| US7691925B2 (en) | 2004-03-08 | 2010-04-06 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and surface protecting film |
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| US7491758B2 (en) | 2004-06-01 | 2009-02-17 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and surface protecting film |
| US7989525B2 (en) | 2004-07-26 | 2011-08-02 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film |
| US7846999B2 (en) | 2004-07-26 | 2010-12-07 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film |
| US7842742B2 (en) | 2004-07-26 | 2010-11-30 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, and surface protecting film |
| US8318859B2 (en) | 2005-03-16 | 2012-11-27 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
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