JP2002350612A - Light shielding film, light shielding adhesive sheet and display panel which uses the same - Google Patents
Light shielding film, light shielding adhesive sheet and display panel which uses the sameInfo
- Publication number
- JP2002350612A JP2002350612A JP2001156851A JP2001156851A JP2002350612A JP 2002350612 A JP2002350612 A JP 2002350612A JP 2001156851 A JP2001156851 A JP 2001156851A JP 2001156851 A JP2001156851 A JP 2001156851A JP 2002350612 A JP2002350612 A JP 2002350612A
- Authority
- JP
- Japan
- Prior art keywords
- light
- film
- metal thin
- shielding
- 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)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属薄膜層を遮光
層とする遮光性フィルム、該遮光性フィルムを基材フィ
ルムとして使用した遮光性粘着シート、および該遮光性
粘着シートを貼着したディスプレイ用電子機器に関し、
さらにはプラスチックフィルムの両面に金属薄膜層を有
する遮光性フィルムの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-shielding film having a metal thin film layer as a light-shielding layer, a light-shielding pressure-sensitive adhesive sheet using the light-shielding film as a base film, and a display having the light-shielding pressure-sensitive adhesive sheet adhered thereto. Electronic equipment for
Furthermore, the present invention relates to a method for producing a light-shielding film having a metal thin film layer on both surfaces of a plastic film.
【０００２】[0002]
【従来の技術】液晶ディスプレイ、ＣＲＴディスプレ
イ、プラズマディスプレイ、あるいはＥＬディスプレイ
などのディスプレイ用電子機器においては、通常、有効
表示画面の面積は実際に表示される画面の面積より小さ
く設定されており、不要な画面外周部を遮光性フィルム
等で縁取り（トリミング）している。図１〜３は、ディ
スプレイ用電子機器の代表例として、液晶表示パネルを
組み込んだディスプレイ用電子機器の断面を模式的に表
したものである。ここで、符号５で示した部分に、画面
のトリミングと、部品の隙間から漏洩する不要な光を遮
断することを目的として、遮光層が設けられる。2. Description of the Related Art In display electronic devices such as a liquid crystal display, a CRT display, a plasma display, and an EL display, the area of an effective display screen is usually set to be smaller than the area of an actually displayed screen. The outer periphery of the screen is trimmed with a light-shielding film or the like. 1 to 3 schematically show a cross section of a display electronic device incorporating a liquid crystal display panel as a representative example of the display electronic device. Here, a light-shielding layer is provided in a portion indicated by reference numeral 5 for the purpose of trimming a screen and blocking unnecessary light leaking from a gap between components.
【０００３】上記目的のために遮光フィルムを使用する
場合、従来は金属蒸着フィルムが多用されている。金属
蒸着フィルムを使用した遮光性フィルムは、金属蒸着膜
（遮光層）がきわめて薄いので、電子機器の軽薄短小化
の目的に合致するという利点がある。しかし、プラスチ
ックの片面に金属蒸着したフィルムでは遮光性能が必ず
しも十分ではなく、ピンホールが多いという欠点もあ
り、高い遮光性を有し、かつピンホールのない金属蒸着
フィルムが求められている。[0003] When a light-shielding film is used for the above purpose, a metal-deposited film is conventionally used in many cases. A light-shielding film using a metal vapor-deposited film has an advantage that the metal vapor-deposited film (light-shielding layer) is extremely thin, and thus meets the purpose of reducing the weight and thickness of electronic devices. However, a film in which metal is vapor-deposited on one side of plastic does not always have sufficient light-shielding performance and has a drawback of having many pinholes. Therefore, a metal-deposited film having high light-shielding properties and having no pinhole is required.
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は、金属
薄膜層を遮光層とし、高い遮光性を有し、かつピンホー
ルのない遮光性フィルム、該遮光性フィルムを基材フィ
ルムとして使用した遮光性粘着シート、および該遮光性
粘着シートを貼着したディスプレイ用電子機器を提供す
ること、ならびに、プラスチックフィルムの両面に金属
薄膜層を有する遮光性フィルムの製造方法を提供するこ
とにある。An object of the present invention is to provide a light-shielding film having a metal thin film layer as a light-shielding layer, having a high light-shielding property and having no pinholes, and using the light-shielding film as a base film. An object of the present invention is to provide a light-shielding pressure-sensitive adhesive sheet, a display electronic device to which the light-shielding pressure-sensitive adhesive sheet is attached, and a method for manufacturing a light-shielding film having a metal thin film layer on both surfaces of a plastic film.
【０００５】[0005]
【課題を解決するための手段】本発明者等は、少なくと
も２層の金属薄膜層を有するプラスチックフィルムであ
って、３００〜８００ｎｍの波長領域にわたって、光透
過率が０．３％以下である遮光性フィルムを提供し、該
遮光性フィルムの少なくとも片面に粘着剤層を有する遮
光性粘着シートを提供し、該遮光性粘着シートを貼着し
たディスプレイ用電子機器を提供し、さらにはプラスチ
ックフィルムの片面に金属薄膜層（Ａ）を設ける工程、
該金属薄膜層（Ａ）の表面に保護コート層を設ける工
程、および該プラスチックフィルムの金属薄膜層（Ａ）
とは反対側の面に、さらに金属薄膜層（Ｂ）を設ける工
程からなる、遮光性フィルムの製造方法を提供すること
によって上記課題を解決した。Means for Solving the Problems The present inventors have proposed a plastic film having at least two metal thin film layers and having a light transmittance of 0.3% or less over a wavelength range of 300 to 800 nm. A light-blocking film, a light-blocking pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer on at least one side of the light-blocking film, a display electronic device having the light-blocking pressure-sensitive adhesive sheet adhered thereon, and a single-sided plastic film. Providing a metal thin film layer (A) on
A step of providing a protective coat layer on the surface of the metal thin film layer (A), and a metal thin film layer (A) of the plastic film;
The above problem was solved by providing a method for producing a light-shielding film, comprising a step of further providing a metal thin film layer (B) on the surface on the side opposite to the above.
【０００６】[0006]
【発明の実施の形態】（１）遮光性フィルム 本発明の遮光性フィルムは、２層以上の金属薄膜層を有
するプラスチックであり、３００〜８００ｎｍの波長領
域にわたって、光透過率が０．３％以下である。該プラ
スチックフィルムは、単層フィルムであっても積層フィ
ルムであってもよい。単層フィルムである場合は、両面
に金属薄膜層が形成されており、積層フィルムである場
合は、最終的に得られる遮光性フィルムが少なくとも２
層の金属薄膜層を有していればよく、金属薄膜層が積層
フィルムの中間層に形成されていてもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Light-Shielding Film The light-shielding film of the present invention is a plastic having two or more metal thin film layers, and has a light transmittance of 0.3% over a wavelength range of 300 to 800 nm. It is as follows. The plastic film may be a single-layer film or a laminated film. In the case of a single-layer film, metal thin-film layers are formed on both sides, and in the case of a laminated film, at least two light-shielding films are obtained.
It is sufficient that the metal thin film layer has a metal thin film layer, and the metal thin film layer may be formed on the intermediate layer of the laminated film.
【０００７】本発明の遮光性フィルムに使用できるプラ
スチックフィルムの材質は、特に限定されるものではな
いが、たとえば、ポリプロピレン、ポリエチレン、ポリ
（メタ）アクリル酸エステル、ポリ塩化ビニル、ポリフ
ッ化ビニリデン、ポリスチレン、ＡＢＳ樹脂、ポリエチ
レンテレフタレート、ナイロン、ポリウレタン、ポリカ
ーボーネートなどを挙げることができる。プラスチック
フィルムの厚さは、単層または積層いずれの場合も、５
〜１００μｍが好ましく、より好ましくは１０〜７５μ
ｍ、最も好ましいのは１２〜５０μｍである。５μｍよ
り薄い場合は、フィルムにコシがないので粘着シートと
したときに貼付作業がしにくく、１００μｍを超える場
合は、逆にフィルムのコシが強すぎるため、被着体への
密着性が低下する傾向がある。プラスチックフィルム中
に、酸化チタン、炭酸カルシウム、あるいはカーボーン
ブラック等、隠蔽性の高い顔料を含有させれば、一層高
い遮光性が得られる。金属薄膜、接着剤、あるいは粘着
剤との接着性を高める目的で、プラスチックフィルムの
表面をコロナ放電処理したり、表面にプライマーコート
層を設けてもよい。The material of the plastic film which can be used for the light-shielding film of the present invention is not particularly limited. , ABS resin, polyethylene terephthalate, nylon, polyurethane, polycarbonate and the like. The thickness of the plastic film is 5
~ 100μm, more preferably 10 ~ 75μ
m, most preferably 12 to 50 μm. When the thickness is less than 5 μm, the film has no stiffness, so that it is difficult to perform the sticking operation when the adhesive sheet is formed. When the thickness exceeds 100 μm, the stiffness of the film is too strong. Tend. If a highly opaque pigment such as titanium oxide, calcium carbonate, or carbon black is contained in the plastic film, higher light-shielding properties can be obtained. The surface of the plastic film may be subjected to a corona discharge treatment, or a primer coat layer may be provided on the surface, for the purpose of enhancing the adhesion to the metal thin film, the adhesive, or the adhesive.
【０００８】金属薄膜層の金属としては、特に限定はな
い。アルミニウム、鉄、クロム、ニッケル、金、銀、銅
などから適宜選択することができる。空気中で安定な金
属が好ましい。また、金属は単体で使用するほかに、合
金や金属酸化物、たとえば酸化鉄等を使用することもで
きる。プラスチックフィルム上に金属薄膜層を形成する
方法としては、融点の低い金属の場合は蒸着法を、融点
の高い金属や金属酸化物の場合は、スパッタリング法や
イオンプレーティング法を使用することができるほか、
プラスチックフィルム表面に電気メッキまたは化学メッ
キしてもよいし、接着剤を使用してプラスチックフィル
ム表面に金属箔を積層してもよい。本発明においては、
ポリエチレンテレフタレートフィルムにアルミニウムを
蒸着した遮光性フィルムが最も好ましい。金属薄膜層の
厚さは、３００〜８００ｎｍの波長領域にわたって、光
透過率が０．３％以下となるように任意に決定すること
ができるが、３０〜５００ｎｍ、好ましくは３５〜３０
０ｎｍ、最も好ましいのは４０〜１００ｎｍである。The metal of the metal thin film layer is not particularly limited. It can be appropriately selected from aluminum, iron, chromium, nickel, gold, silver, copper and the like. Metals that are stable in air are preferred. In addition to using the metal alone, an alloy or a metal oxide such as iron oxide can be used. As a method of forming a metal thin film layer on a plastic film, a vapor deposition method can be used for a metal having a low melting point, and a sputtering method or an ion plating method can be used for a metal or a metal oxide having a high melting point. In addition,
The surface of the plastic film may be electroplated or chemically plated, or a metal foil may be laminated on the surface of the plastic film using an adhesive. In the present invention,
A light-shielding film obtained by depositing aluminum on a polyethylene terephthalate film is most preferable. The thickness of the metal thin film layer can be arbitrarily determined so that the light transmittance is 0.3% or less over a wavelength range of 300 to 800 nm, but is 30 to 500 nm, preferably 35 to 30 nm.
0 nm, most preferably 40-100 nm.
【０００９】上記遮光性フィルムの金属薄膜層が１層の
場合、ピンホールの数を０にすることは著しく困難であ
るが、２層以上とした場合は、各層のピンホールが同じ
位置で重なりあう確率はきわめて低く、ピンホールの数
をほとんど０とすることができる。金属薄膜層を、プラ
スチックフィルムの両面に形成した場合は、遮光性フィ
ルム全体の厚さを薄くすることができる。厚さを５μｍ
とすることもできるので、特に電子機器への用途に好適
である。しかし、本発明の遮光性フィルムの金属薄膜層
は、必ずしもプラスチックフィルムの両面に形成されて
いる必要はなく、片面に金属薄膜層を有するプラスチッ
クフィルムを、接着剤を使用して積層したものでも同様
の効果が得られる。この場合は、両面に金属薄膜層を有
する遮光性フィルムよりも、フィルム全体の厚さが厚く
なるが、３層以上の金属薄膜層を設けることもでき、し
かも、これら金属薄膜層をプラスチックフィルム表面に
設けるのではなく、中間層とした場合には、金属薄膜層
が、酸化や機械的な損傷から保護されるなどの利点があ
る。When the light-shielding film has only one metal thin film layer, it is extremely difficult to reduce the number of pinholes to zero. However, when the number of layers is two or more, the pinholes of each layer overlap at the same position. The probability of meeting is very low, and the number of pinholes can be almost zero. When the metal thin film layers are formed on both surfaces of the plastic film, the thickness of the entire light-shielding film can be reduced. 5 μm thickness
It is particularly suitable for use in electronic equipment. However, the metal thin film layer of the light-shielding film of the present invention does not necessarily have to be formed on both sides of the plastic film, and the same applies to a plastic film having a metal thin film layer on one side, which is laminated using an adhesive. The effect of is obtained. In this case, the thickness of the entire film is thicker than that of a light-shielding film having a metal thin film layer on both sides. However, three or more metal thin film layers can be provided. When an intermediate layer is used instead of the metal layer, there is an advantage that the metal thin film layer is protected from oxidation and mechanical damage.
【００１０】（２）プラスチックフィルムの両面に金属
薄膜層を設ける遮光性フィルムの製造方法 本発明の遮光性フィルムをできるだけ薄くするには、プ
ラスチックフィルムの両面に金属薄膜層を設けるのが好
ましい。従来、プラスチックフィルムの両面に金属薄膜
層を設ける場合、片面に金属薄膜層（Ａ）を形成した
後、裏面に金属薄膜層（Ｂ）を形成して巻き取るという
方法が一般的であるが、巻き取った際に、金属薄膜層
（Ａ）と金属薄膜層（Ｂ）とが擦れ合って金属薄膜が損
傷を受けるため、著しく収率が低下するという問題点が
あった。そこで本発明者等は、金属薄膜層（Ａ）を設け
た後に、該金属薄膜層（Ａ）の表面に保護コート層を設
けていったん巻き取り、次いで裏面に金属薄膜層（Ｂ）
を形成した場合は、巻き取った際に金属薄膜が損傷しな
いことを見出し、上記問題点を解決した。(2) Method for producing light-shielding film in which metal thin film layers are provided on both surfaces of plastic film In order to make the light-shielding film of the present invention as thin as possible, it is preferable to provide metal thin film layers on both surfaces of the plastic film. Conventionally, when a metal thin film layer is provided on both surfaces of a plastic film, a method of forming a metal thin film layer (A) on one surface and then forming and winding a metal thin film layer (B) on the back surface is generally used. At the time of winding, the metal thin film layer (A) and the metal thin film layer (B) rub against each other, and the metal thin film is damaged. Therefore, the present inventors have provided a metal thin film layer (A), and subsequently provided a protective coat layer on the surface of the metal thin film layer (A), and then wound the metal thin film layer (B) on the back surface.
It was found that when the film was formed, the metal thin film was not damaged when the film was wound, and the above problem was solved.
【００１１】上記のように、保護コート層は、両面に金
属薄膜層を有する遮光性フィルムを巻き取った際に、金
属薄膜層（Ａ）と金属薄膜層（Ｂ）とが擦れ合って損傷
を受けないよう保護するためのものであるので、保護コ
ート層と金属薄膜層との摩擦係数をできるだけ小さくす
ることが好ましい。保護コート層用コーティング剤は、
必須成分として結着樹脂と溶剤を含有する。結着樹脂と
しては、アクリル樹脂、ポリビニルアルコール、エチレ
ン−酢酸ビニル共重合体、あるいはそのケン化物、スチ
レン−ブタジエン共重合体等を使用することができる。
溶剤には、水、アルコール類、エステル類、芳香族系溶
剤など、公知の溶剤の中から適宜選択することができ、
これらの混合溶剤であってもよい。As described above, when a light-shielding film having a metal thin film layer on both sides is wound up, the protective thin film layer rubs between the metal thin film layer (A) and the metal thin film layer (B) to cause damage. It is preferable to reduce the coefficient of friction between the protective coat layer and the metal thin film layer as much as possible, since it is intended to protect the metal layer from being exposed. The coating agent for the protective coat layer is
It contains a binder resin and a solvent as essential components. As the binder resin, an acrylic resin, polyvinyl alcohol, an ethylene-vinyl acetate copolymer, a saponified product thereof, a styrene-butadiene copolymer, or the like can be used.
The solvent can be appropriately selected from known solvents such as water, alcohols, esters, and aromatic solvents.
These mixed solvents may be used.
【００１２】また保護コート層用コーティング剤には、
添加剤として、ヘキサメチレンジイソシアネート、トリ
レンジイソシアネート、ジグリシジルエーテル等の架橋
剤、炭酸カルシウム、酸化チタン、シリカ等の顔料、シ
リコーン樹脂、フッ素系樹脂、ワックス等、金属薄膜層
との摩擦係数を小さくする滑剤、界面活性剤等の添加剤
を添加することもできる。保護コート層用コーティング
剤の配合は、結着樹脂２０〜３０質量％、顔料５〜１０
質量％、溶剤６０〜７０質量％、架橋剤０〜２質量％と
するのが好ましい。塗布量は、０．５〜５ｇ／ｍ２が好
ましく、より好ましくは２〜４ｇ／ｍ２である。金属薄
膜層上への保護コート層用コーティング剤の塗布は、公
知慣用のコーターを使用することができる。Further, the coating agent for the protective coat layer includes:
As additives, crosslinking agents such as hexamethylene diisocyanate, tolylene diisocyanate, diglycidyl ether, pigments such as calcium carbonate, titanium oxide and silica, silicone resins, fluororesins, waxes, etc., have a small friction coefficient with the metal thin film layer. Additives such as lubricants and surfactants can also be added. The composition of the coating agent for the protective coat layer is such that the binder resin is 20 to 30% by mass, and the pigment is 5 to 10%.
It is preferable that the content is 60% by mass, the solvent is 60 to 70% by mass, and the crosslinking agent is 0 to 2% by mass. The coating amount is preferably 0.5 to 5 g / m 2 , and more preferably 2 to 4 g / m 2 . A coating agent for a protective coat layer can be applied on the metal thin film layer using a known and common coater.
【００１３】（３）遮光性粘着シート 本発明の遮光性粘着シートは、少なくとも２層の金属薄
膜層を有し、３００〜８００ｎｍの波長領域にわたっ
て、光透過率が０．３％以下である遮光性フィルムを基
材フィルムとし、その片面あるいは両面に粘着剤層を設
けた粘着シートである。粘着剤としては、特に限定はな
く公知の粘着剤を使用することができ、具体的には、２
−エチルヘキシルアクリレート、ブチルアクリレート、
エチルアクリレート、酢酸ビニル、メタクリル酸メチル
等のビニルモノマーの単独重合体または共重合体である
アクリル樹脂系、ポリウレタン系、天然または合成ゴム
系の粘着剤が挙げられる。また耐久性に優れ、安価なア
クリル樹脂系の粘着剤が特に好ましい。粘着剤層には、
必用に応じて粘着付与剤、紫外線吸収剤、酸化防止剤、
難燃剤、顔料、染料等の添加剤を添加してもよい。粘着
剤層用組成物を調製するための溶剤には、一般に使用さ
れる水に不溶の有機溶剤の他に、水あるいは水性溶剤を
使用することもでき、これらの溶液あるいはエマルジョ
ンとすることができる。(3) Light-shielding pressure-sensitive adhesive sheet The light-shielding pressure-sensitive adhesive sheet of the present invention has at least two metal thin film layers and has a light transmittance of 0.3% or less over a wavelength range of 300 to 800 nm. An adhesive sheet comprising an adhesive film as a base film and an adhesive layer provided on one or both sides thereof. The pressure-sensitive adhesive is not particularly limited, and a known pressure-sensitive adhesive can be used.
-Ethylhexyl acrylate, butyl acrylate,
Acrylic resin-based, polyurethane-based, natural or synthetic rubber-based pressure-sensitive adhesives, which are homopolymers or copolymers of vinyl monomers such as ethyl acrylate, vinyl acetate, and methyl methacrylate, may be used. Further, an acrylic resin-based pressure-sensitive adhesive which is excellent in durability and inexpensive is particularly preferable. In the adhesive layer,
Tackifiers, UV absorbers, antioxidants,
Additives such as flame retardants, pigments and dyes may be added. As a solvent for preparing the composition for the pressure-sensitive adhesive layer, in addition to a commonly used water-insoluble organic solvent, water or an aqueous solvent can also be used, and these solutions or emulsions can be used. .
【００１４】粘着剤層用組成物は、乾燥後の粘着剤層が
５〜４０ｇ／ｍ２、好ましくは１０〜３５ｇ／ｍ２、さ
らに好ましくは１５〜３０ｇ／ｍ２となるように塗布す
る。塗布方式は特に限定されるものではなく、たとえば
バーコーター、ロールコーター、ブレードコーター、キ
スコーター、グラビア印刷機等、公知の塗布方式を採用
することができる。粘着剤層用組成物を、直接基材フィ
ルムに塗布することができるが、あらかじめセパレータ
上に粘着剤層を形成しておき、これを基材フィルムに貼
り合わせてもよい。両面粘着シートの場合には、両粘着
剤層の接着力の比が、１：１．１〜１：１．５となるよ
う接着力に差を設けると、貼付作業性が向上する。The composition for the pressure-sensitive adhesive layer is applied so that the pressure-sensitive adhesive layer after drying is 5 to 40 g / m 2 , preferably 10 to 35 g / m 2 , and more preferably 15 to 30 g / m 2 . The coating method is not particularly limited. For example, a known coating method such as a bar coater, a roll coater, a blade coater, a kiss coater, a gravure printing machine, or the like can be used. The composition for a pressure-sensitive adhesive layer can be directly applied to a substrate film. Alternatively, a pressure-sensitive adhesive layer may be formed on a separator in advance, and this may be bonded to the substrate film. In the case of a double-sided pressure-sensitive adhesive sheet, when a difference is provided between the pressure-sensitive adhesive layers such that the ratio of the pressure-sensitive adhesive layers is 1: 1.1 to 1: 1.5, the workability of the application is improved.
【００１５】（４）本発明の遮光性粘着シートを貼着し
たディスプレイ用電子機器 本発明の遮光性粘着シートは、遮光層として少なくとも
２層の金属薄膜層を有するので、遮光性能が高く、ピン
ホールが皆無に近いという特徴を有する。図１〜３の符
号５で示される部位に遮光性両面粘着シートを貼着した
ディスプレイ用電子機器においては、表示画面のトリミ
ング部分にピンホールや不要な漏洩光がなく、しかも該
遮光性両面粘着シートに接触する各部品が接着固定され
る。図１〜３に、本発明の遮光性粘着シートを使用した
代表的なディスプレイ用電子機器である液晶ディスプレ
イの断面図を示す。図中、符号５で示した部分が遮光性
両面粘着シートである。本発明の遮光性粘着シートは、
液晶ディスプレイに限らず、それ以外の遮光を必要とす
る用途にも使用することができる。また、遮光性両面粘
着シートを、遮光性を必要としないディスプレイ用以外
の電子機器に対して、部品を固定する目的のみに使用す
ることもできる。(4) Electronic device for display to which the light-shielding pressure-sensitive adhesive sheet of the present invention is adhered The light-shielding pressure-sensitive adhesive sheet of the present invention has at least two metal thin film layers as a light-shielding layer. It has the characteristic that there are almost no holes. In a display electronic device in which a light-shielding double-sided pressure-sensitive adhesive sheet is adhered to a portion indicated by reference numeral 5 in FIGS. 1 to 3, there is no pinhole or unnecessary leakage light in a trimming portion of a display screen, and the light-shielding double-sided pressure-sensitive adhesive is used. Each part in contact with the sheet is adhesively fixed. 1 to 3 are cross-sectional views of a liquid crystal display, which is a typical display electronic device using the light-shielding pressure-sensitive adhesive sheet of the present invention. In the figure, the portion indicated by reference numeral 5 is a light-shielding double-sided pressure-sensitive adhesive sheet. The light-shielding pressure-sensitive adhesive sheet of the present invention,
The present invention can be used not only for liquid crystal displays but also for other applications requiring light shielding. Further, the light-shielding double-sided pressure-sensitive adhesive sheet can be used only for the purpose of fixing components to electronic devices other than display devices that do not require light-shielding properties.
【００１６】[0016]
【実施例】以下に実施例および比較例により、本発明を
より具体的に説明する。特に断らない限り、部および％
は、それぞれ質量部および質量％を表す。The present invention will be described more specifically with reference to the following examples and comparative examples. Parts and% unless otherwise noted
Represents mass parts and mass%, respectively.
【００１７】（実施例１） ＜遮光性フィルム（Ｉ）＞東洋紡積社製ポリエステルフ
ィルム「Ａ−４１００」（厚さ：５０μｍ）の片面に、
１０−２Ｐａの減圧下アルミニウムを蒸着して厚さ４５
±５ｎｍの金属薄膜層（Ａ）を形成した。次いで該金属
薄膜層（Ａ）上に、グラビアコーターを使用して、大日
精化工業社製「アルミラー（蒸着用）」を、乾燥後の塗
布量が２ｇ／ｍ２になるように塗布して保護コート層を
設け、保護コート層付片面金属蒸着フィルムを得た。上
記保護コート層付片面金属蒸着フィルムの、金属蒸着が
施されていないポリエステルフィルム面に、金属薄膜層
（Ａ）と同様にしてアルミニウムを蒸着して金属薄膜層
（Ｂ）を形成し、両面に金属薄膜層を有し、片側の金属
薄膜層上に保護コート層を有する遮光性フィルム（Ｉ）
を得た。(Example 1) <Light-shielding film (I)> A polyester film “A-4100” (thickness: 50 μm) manufactured by Toyobo Co., Ltd.
Aluminum is deposited under reduced pressure of 10 -2 Pa to a thickness of 45
A metal thin film layer (A) of ± 5 nm was formed. Next, “Almirror (for vapor deposition)” manufactured by Dainichi Seika Kogyo Co., Ltd. was applied onto the metal thin film layer (A) using a gravure coater so that the coating amount after drying was 2 g / m 2. A protective coat layer was provided to obtain a single-sided metal-deposited film with a protective coat layer. The metal thin film layer (B) is formed by evaporating aluminum in the same manner as the metal thin film layer (A) on the polyester film surface of the single-sided metal evaporated film with the protective coat layer on which the metal evaporation is not performed. Light-shielding film (I) having a metal thin-film layer and having a protective coating layer on one side of the metal thin-film layer
I got
【００１８】（実施例２） ＜遮光性フィルム（ＩＩ）＞東洋メタライジング社製ア
ルミニウム蒸着ポリエステルフィルム「メタルミーＴＬ
＃３８」のアルミニウム蒸着面に、大日本インキ化学工
業社製「ディックドライＬＸ−６０５」と、同社製架橋
剤「ＫＷ４０」とを質量比５：１の割合で混合した接着
剤を、グラビアコーターを使用して乾燥後の塗布量が４
±０．５ｇ／ｍ２となるように塗布し、乾燥後、前記
「メタルミーＴＬ＃３８」のポリエステルフィルム面に
ドライラミネート法により貼り合わせ、積層フィルムの
片面と中間層に金属薄膜層を有する遮光性フィルム（Ｉ
Ｉ）を得た。(Example 2) <Light-shielding film (II)> Aluminum-deposited polyester film "Metal Me TL" manufactured by Toyo Metallizing Co., Ltd.
An adhesive obtained by mixing “Dick Dry LX-605” manufactured by Dainippon Ink and Chemicals, Ltd. and a cross-linking agent “KW40” manufactured by Dainippon Ink and Chemicals at a weight ratio of 5: 1 was applied to the aluminum vapor-deposited surface of “# 38” by a gravure coater. The amount of coating after drying using
It is applied so as to have a thickness of ± 0.5 g / m 2 , dried, and then laminated on the polyester film surface of “Metal Me TL # 38” by a dry lamination method, and has a metal thin film layer on one side of the laminated film and an intermediate layer. Film (I
I) was obtained.
【００１９】（実施例３） ＜遮光性粘着シート（Ｉ）＞遮光性フィルム（Ｉ）の金
属薄膜層表面に、綜研化学社製粘着剤「ＳＫ−１７６
１」１００部、同社製架橋剤「Ｌ−４５」１．８部、お
よび石原産業社製酸化チタン「Ｒ−２０」１０部からな
る粘着剤組成物を、ロールコーターを使用して、乾燥後
の塗布量が３５ｇ／ｍ２となるように塗布し、乾燥後東
セロ社製ポリエステル剥離ライナー「ＳＰ−ＰＥＴ−０
１−１００Ｂ」を貼り合わせ、遮光性フィルム（Ｉ）の
片面に粘着剤層を設けた遮光性粘着シート（Ｉ）を得
た。Example 3 <Light-shielding pressure-sensitive adhesive sheet (I)> An adhesive "SK-176" manufactured by Soken Chemical Co., Ltd. was applied to the surface of the metal thin film layer of the light-shielding film (I).
1 ", 100 parts of a crosslinking agent" L-45 "manufactured by the same company, 1.8 parts of a pressure-sensitive adhesive composition comprising 10 parts of titanium oxide" R-20 "manufactured by Ishihara Sangyo Co., Ltd. after drying using a roll coater. Is applied so that the coating amount becomes 35 g / m 2, and after drying, a polyester release liner “SP-PET-0” manufactured by Tocelo Co., Ltd.
1-100B "to obtain a light-shielding pressure-sensitive adhesive sheet (I) in which a pressure-sensitive adhesive layer was provided on one side of a light-shielding film (I).
【００２０】（実施例４） ＜遮光性粘着シート（ＩＩ）＞実施例３で得られた遮光
性粘着シート（Ｉ）の、粘着剤層を設けた面とは反対側
の面に、日本カーバイド工業社製「ＫＰ−１０７９」１
００部および同社製架橋剤「ＣＫ−１０１」２部からな
る粘着剤組成物を、ロールコーターを使用して、乾燥後
の塗布量が１５ｇ／ｍ２となるように塗布し、乾燥後
（株）麗光製ポリエステル剥離ライナー「ファインピー
ル２００」を貼り合わせて、遮光性フィルム（Ｉ）の両
面に粘着剤層を設けた遮光性粘着シート（ＩＩ）を得
た。(Example 4) <Light-shielding pressure-sensitive adhesive sheet (II)> The light-shielding pressure-sensitive adhesive sheet (I) obtained in Example 3 was coated with Nippon Carbide on the surface opposite to the surface provided with the pressure-sensitive adhesive layer. Industrial company “KP-1079” 1
An adhesive composition consisting of 00 parts and 2 parts of a crosslinking agent “CK-101” manufactured by the company was applied using a roll coater so that the coating amount after drying was 15 g / m 2, and after drying, ) A polyester release liner made by Reiko "Fine Peel 200" was attached to obtain a light-shielding pressure-sensitive adhesive sheet (II) in which pressure-sensitive adhesive layers were provided on both surfaces of a light-shielding film (I).
【００２１】（実施例５） ＜遮光性粘着シート（ＩＩＩ）＞基材フィルムとして遮
光性フィルム（ＩＩ）を使用した以外は、実施例３およ
び４と同様にして、積層フィルムの片面と中間層に金属
薄膜層を有する遮光性フィルム（ＩＩ）の両面に粘着剤
層を設けた遮光性粘着シート（ＩＩＩ）を得た。Example 5 <Light-shielding pressure-sensitive adhesive sheet (III)> One side of a laminated film and an intermediate layer were prepared in the same manner as in Examples 3 and 4, except that a light-shielding film (II) was used as a base film. To obtain a light-shielding pressure-sensitive adhesive sheet (III) in which pressure-sensitive adhesive layers were provided on both sides of a light-shielding film (II) having a metal thin film layer.
【００２２】（比較例１） ＜遮光性フィルム（ＩＩＩ）＞実施例１で得た保護コー
ト層付片面金属蒸着フィルムを遮光性フィルム（ＩＩ
Ｉ）とした。(Comparative Example 1) <Light-shielding film (III)> The single-sided metal-deposited film with a protective coat layer obtained in Example 1 was replaced with a light-shielding film (II).
I).
【００２３】（比較例２） ＜遮光性フィルム（ＩＶ）＞「メタルミーＴＬ＃３８」
を遮光性フィルム（ＩＶ）とした。実施例１および２で
得た遮光性フィルム（Ｉ）および（ＩＩ）、ならびに比
較例１および２の遮光性フィルム（ＩＩＩ）および（Ｉ
Ｖ）につき、光透過率と、ピンホールの数を測定した。
光透過率の測定には日本分光社製紫外可視分光光度計
「Ｖ−５２０−ＳＲ」を使用し、３００〜８００ｎｍの
波長域における光透過率の最大値を求めた。ピンホール
の測定は、暗室中で、富士カラー販売社製「富士カラー
ライトボックス８Ｗ・ＡＡＡ」上に１０ｃｍ平方の遮光
性フィルムを置き、目視によってピンホールの数を数え
た。測定の結果を表１に示す。(Comparative Example 2) <Light-shielding film (IV)>"Metal Me TL # 38"
Was defined as a light-shielding film (IV). The light-shielding films (I) and (II) obtained in Examples 1 and 2, and the light-shielding films (III) and (I) of Comparative Examples 1 and 2
For V), the light transmittance and the number of pinholes were measured.
For the measurement of the light transmittance, an ultraviolet-visible spectrophotometer “V-520-SR” manufactured by JASCO Corporation was used, and the maximum value of the light transmittance in a wavelength range of 300 to 800 nm was obtained. The pinhole was measured by placing a 10 cm square light-shielding film on a “Fuji Color Light Box 8W AAA” manufactured by Fuji Color Sales Co., Ltd. in a dark room, and visually counting the number of pinholes. Table 1 shows the measurement results.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】本発明の遮光性フィルムは、遮光層とし
て少なくとも２層の金属薄膜層を有するので、遮光性能
が高く、ピンホールが皆無に近いという特徴を有する。
該遮光性フィルムを基材フィルムとして使用した遮光性
粘着シートを貼着したディスプレイ用電子機器において
は、表示画面のトリミング部分にピンホールや不要な漏
洩光がなく、表示画面のコントラストが改善されるとい
う効果がある。また該遮光性両面粘着シートが両面粘着
シートである場合には、部品を簡便に固定できるという
効果もある。Since the light-shielding film of the present invention has at least two metal thin-film layers as light-shielding layers, it has high light-shielding performance and has almost no pinholes.
In a display electronic device to which a light-shielding pressure-sensitive adhesive sheet using the light-shielding film as a base film is adhered, there is no pinhole or unnecessary leakage light in a trimming portion of the display screen, and the contrast of the display screen is improved. This has the effect. When the light-shielding double-sided pressure-sensitive adhesive sheet is a double-sided pressure-sensitive adhesive sheet, there is also an effect that components can be easily fixed.
【図面の簡単な説明】[Brief description of the drawings]
【図１】遮光性両面粘着シートを使用して、液晶ディス
プレイの筐体に、透明樹脂パネルを固定した図である。FIG. 1 is a diagram in which a transparent resin panel is fixed to a housing of a liquid crystal display using a light-shielding double-sided pressure-sensitive adhesive sheet.
【図２】遮光性両面粘着シートを使用して、液晶ディス
プレイの筐体に、液晶表示パネルを固定した図である。FIG. 2 is a diagram in which a liquid crystal display panel is fixed to a housing of a liquid crystal display using a light-shielding double-sided pressure-sensitive adhesive sheet.
【図３】遮光性両面粘着シートを使用して、液晶表示パ
ネルに、照明装置を固定した図である。FIG. 3 is a diagram in which a lighting device is fixed to a liquid crystal display panel using a light-shielding double-sided pressure-sensitive adhesive sheet.
１ 筐体 ２ 透明樹脂パネル ３ 液晶表示パネル ４ 照明装置 ５ 遮光性両面粘着シート DESCRIPTION OF SYMBOLS 1 Housing 2 Transparent resin panel 3 Liquid crystal display panel 4 Lighting device 5 Light-shielding double-sided adhesive sheet
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０２Ｆ 1/1335 Ｇ０２Ｆ 1/1335 Ｇ０９Ｆ 9/00 ３１３ Ｇ０９Ｆ 9/00 ３１３ ３２４ ３２４ Ｆターム(参考） 2H042 AA15 AA26 2H091 FA34X FA34Y FB02 FB08 FC02 FD06 FD16 GA17 LA03 LA11 4F100 AB01B AB01D AB10B AB10D AK01C AK41C AR00A AR00E AT00C BA04 BA07 BA10A CB05E EH66B EH66D GB41 JA20C JK20A JN08 YY00C 4J004 AA04 AA05 AA10 AA14 AB01 CA03 CA04 CA05 CA06 CA08 CB03 CC03 CD02 EA01 FA05 5G435 AA02 BB12 BB15 EE03 EE04 EE12 EE25 FF13 Continuation of the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) G02F 1/1335 G02F 1/1335 G09F 9/00 313 G09F 9/00 313 324 324 F Term (reference) 2H042 AA15 AA26 2H091 FA34X FA34Y FB02 FB08 FC02 FD06 FD16 GA17 LA03 LA11 4F100 AB01B AB01D AB10B AB10D AK01C AK41C AR00A AR00E AT00C BA04 BA07 BA10A CB05E EH66B EH66D GB41 JA20C JK20A JN08 YY00C04 A05A04 A04A05 A04A05 A04 A05A04 AA04 A04A05 EE03 EE04 EE12 EE25 FF13
Claims (7)
ラスチックフィルムであって、３００〜８００ｎｍの波
長領域にわたって、光透過率が０．３％以下であること
を特徴とする遮光性フィルム。1. A light-shielding film comprising a plastic film having at least two metal thin-film layers and having a light transmittance of 0.3% or less over a wavelength range of 300 to 800 nm.
ムの両面に設けられていることを特徴とする請求項１に
記載の遮光性フィルム。2. The light-shielding film according to claim 1, wherein the metal thin film layers are provided on both surfaces of a plastic film.
あることを特徴とする請求項１または２に記載の遮光性
フィルム。3. The light-shielding film according to claim 1, wherein the plastic film is a laminated film.
００μｍである請求項１〜３のいずれかに記載の遮光性
フィルム。4. The plastic film has a thickness of 5-1.
The light-shielding film according to any one of claims 1 to 3, which has a thickness of 00 µm.
フィルムの少なくとも片面に粘着剤層を有する遮光性粘
着シート。5. A light-shielding pressure-sensitive adhesive sheet comprising the light-shielding film according to claim 1 and a pressure-sensitive adhesive layer on at least one surface.
着したディスプレイ用電子機器。6. A display electronic device to which the light-shielding pressure-sensitive adhesive sheet according to claim 5 is attached.
層（Ａ）を設けた後、該金属薄膜層（Ａ）の表面に保護
コート層を設け、次いで該プラスチックフィルムの金属
薄膜層（Ａ）とは反対側の面に、さらに金属薄膜層
（Ｂ）を設けることを特徴とする遮光性フィルムの製造
方法。7. A metal thin film layer (A) is provided on one side of a plastic film, a protective coat layer is provided on the surface of the metal thin film layer (A), and then the metal thin film layer (A) of the plastic film is formed. A method for producing a light-shielding film, further comprising providing a metal thin film layer (B) on the opposite surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001156851A JP2002350612A (en) | 2001-05-25 | 2001-05-25 | Light shielding film, light shielding adhesive sheet and display panel which uses the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001156851A JP2002350612A (en) | 2001-05-25 | 2001-05-25 | Light shielding film, light shielding adhesive sheet and display panel which uses the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002350612A true JP2002350612A (en) | 2002-12-04 |
Family
ID=19000796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001156851A Pending JP2002350612A (en) | 2001-05-25 | 2001-05-25 | Light shielding film, light shielding adhesive sheet and display panel which uses the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002350612A (en) |
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| WO2006058914A1 (en) * | 2004-12-02 | 2006-06-08 | Tesa Ag | Double-sided contact-adhesive tape for producing or bonding lc displays, having light-absorbing properties |
| WO2006058912A1 (en) * | 2004-12-02 | 2006-06-08 | Tesa Ag | Double-sided pressure-sensitive adhesive tapes for producing or sticking together lc displays with light-absorbing properties |
| WO2006133743A1 (en) * | 2005-06-13 | 2006-12-21 | Tesa Ag | Double-sided pressure-sensitive adhesive tapes for producing or bonding lc displays with light-absorbing properties |
| WO2006133742A1 (en) * | 2005-06-13 | 2006-12-21 | Tesa Ag | Double-sided adhesive strip having light-absorbing properties for producing and/or gluing lc-displays |
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| WO2007062692A1 (en) * | 2005-12-02 | 2007-06-07 | Tesa Ag | Double-sided pressure-sensitive adhesive tapes for producing lc-displays having light-reflecting and absorbing properties |
| EP2003179A1 (en) | 2007-06-13 | 2008-12-17 | Nitto Denko Corporation | Pressure-sensitive adhesive sheet |
| DE102007062447A1 (en) | 2007-12-20 | 2009-06-25 | Tesa Ag | Double-sided pressure-sensitive adhesive tape for liquid crystal display systems |
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