JP4014370B2 - Colored adhesive film for electronic displays - Google Patents
Colored adhesive film for electronic displays Download PDFInfo
- Publication number
- JP4014370B2 JP4014370B2 JP2001182617A JP2001182617A JP4014370B2 JP 4014370 B2 JP4014370 B2 JP 4014370B2 JP 2001182617 A JP2001182617 A JP 2001182617A JP 2001182617 A JP2001182617 A JP 2001182617A JP 4014370 B2 JP4014370 B2 JP 4014370B2
- Authority
- JP
- Japan
- Prior art keywords
- molecular weight
- film
- meth
- adhesive
- weight
- 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.)
- Expired - Fee Related
Links
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Optical Elements Other Than Lenses (AREA)
- Optical Filters (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、電子ディスプレイに貼着できる電子ディスプレイ用着色粘着剤付フィルムに関する。
【０００２】
【従来の技術】
近年、家電、情報機器の高機能化、小型・軽量化に伴い粘着剤を用いた製品が多く使用されるようになっている。例えば、液晶ディスプレイ、複写機およびファクシミリ等の液晶操作板、色度調整や反射防止、防眩機能を付与したフィルムを貼着したＣＲＴ（カソードレイチューブ）、近赤外線及び／又は電磁波カット機能を有するフィルムを貼着したプラズマディスプレイパネル（ＰＤＰ）用前面保護板などに粘着剤が使用されている。
【０００３】
具体的には、テレビなどのＣＲＴでは、画面の平面化の対応とも相まって、ガラスを着色するために着色されたシートを粘着剤を介してＣＲＴ前面に貼着するようになっている。また、ＰＤＰにおいても、樹脂板又はガラス板に色補正用の粘着剤付きシートや反射防止用の粘着剤付きシートが貼着されるようになっている。従来このような用途における粘着剤としては、ゴム系、アクリル系、ポリビニルエーテル系、シリコーン系等が挙げられるが、ゴム系は耐老化性に、ポリビニルエーテル系は耐熱性に問題があり、シリコーン系は接着力が充分でないため、アクリル系のものが多く使われていた。
【０００４】
また、最近では、プラズマディスプレイ（ＰＤＰ）、液晶ディスプレイ（ＬＣＤ）、エレクトロルミネッセンスディスブレイ（ＥＬＤ）等のフラットディスプレイにおいては、軽量、薄型、耐破損性、リサイクル率向上等の目的でガラス板の代わりにプラスチック板を使用した電子ディスプレイも実用化されている。しかしながら、ガラス板に用いた粘着剤付フィルムをプラスチック板に貼合すると、高温下または高温高湿下において剥がれや発泡等が生じ、ディスプレイの表示を阻害するという問題があった。従来、このような問題を解決するため、粘着剤とプラスチックとの密着性を向上させる方法として、粘着剤にタッキファイヤー（ＴＦ）を添加することが行われている。タッキファイヤーは、一般に口ジン系または石油系の物質よりなり、その添加によってプラスチックとの密着性が向上することが知られており、剥がれや発泡等の問題を解決することができる。しかしながら、これらタッキファイヤーを用いた粘着剤付フィルムをガラス板に貼合すると、高温下または高温高湿下において、剥がれや発泡等が生じ、ディスプレイの表示を阻害するという問題があった。また、高温下または高温高湿下において、タッキファイヤーがブリードし易く、白濁等による光学特性の悪化、接着力の低下等の問題があった。特に染料が含まれている粘着剤を用いた粘着剤付フィルムでは、高温下または高温高湿下において着色に使用した染料が退色するという問題がおこりやすかった。
【０００５】
したがって、従来の粘着剤については、高温下または高温高湿下で電子ディスプレイに光透過性フィルムを貼着するための十分な機能を備えた粘着剤は存在していないのが実情であった。したがって、ガラス板及びプラスチック板に対しても光透過性フィルムを貼着することが可能な着色粘着剤が求められている。
【０００６】
【発明が解決しようとする課題】
本発明の目的は、高温下または高温高湿下において、染料を含有する粘着剤層の剥がれや発泡を生じることなくガラス板及びプラスチック板を有する電子ディスプレイに対しても十分な信頼性をもって貼着することができ、且つ染料を含有する粘着剤層の色が退色しない着色粘着剤付光透過性フィルムを提供することにある。
【０００７】
【課題を解決するための手段】
本発明の電子ディスプレイ用着色粘着剤付フィルムは、光透過性フィルムの一面に（メタ）アクリル系樹脂と染料を含有する粘着剤層を設けてなり、該（メタ）アクリル系樹脂が、重量平均分子量が２０万以上の高分子量体と重量平均分子量が２０万未満の低分子量体とから少なくとも構成され、且つ官能基を有し、前記高分子量体と低分子量体の少なくとも一方が、アマイド基を有し、前記（メタ）アクリル系樹脂中に脂肪族不飽和カルボン酸が５重量％以下含有することを特徴とする。
【０００８】
【発明の実施の形態】
まず、本発明の電子ディスプレイ用着色粘着剤付フィルムを構成する光透過性フィルムについて詳説する。本発明に使用する光透過性フィルムは光学的透明性を有するものが好ましく用いられ、例えば光学特性、強度及び経済性等の点から、トリアセチルセルロース等のセルロース系フィルム、ポリカーボネート系フィルム、ポリエチレンテレフタレート等のポリエステル系フィルム等、ポリエチレンおよびポリプロピレン等のポリオレフィン系フィルムが好ましいものとして挙げられる。光透過性フィルムの膜厚は、一般に１０〜５００μｍの範囲であり、好ましくは２５〜２５０μｍの範囲である。
【０００９】
この光透過性フィルムは、その一面にハードコート層、導電層、防眩層および反射防止層の少なくとも１つを有することが好ましい。ハードコート層としては、例えば、一般的な無機、有機のコーティング剤等が挙げられる。導電層としては、金属や金属酸化物の蒸着、スパッタ膜等が挙げられる。防眩層としては、シリカ粒子、アクリル樹脂粒子等のビーズ含有樹脂のコーティング剤、マット処理等が挙げられる。反射防止層としては、低屈折率の物質と高屈折率の物質とを交互に塗工や蒸着、スパッタ処理して積層されたものが挙げられる。
下記に述べる粘着剤層は、上記ハードコート層、導電層、防眩層および反射防止層を設けた光透過性フィルムの反対面に設ける。
【００１０】
次に上記光透過性フィルムに設ける粘着剤層を構成する粘着剤について詳説する。該粘着剤としては、−４０℃〜８０℃程度で粘着性を示す（メタ）アクリル系樹脂が使用される。この（メタ）アクリル系樹脂は、分子量の高い高分子量体と分子量が低い低分子量体とから少なくとも構成される。より詳細には、重量平均分子量が２０万以上の（メタ）アクリル樹脂（高分子量体）と、重量平均分子量が２０万未満の（メタ）アクリル樹脂（低分子量体）との混合物より少なくとも構成される。これらの（メタ）アクリル樹脂は、（メタ）アクリル酸エステルの単独重合体および好ましくは共重合体である。
【００１１】
前記分子量が異なる（メタ）アクリル樹脂に単量体として用いられる（メタ）アクリル酸エステルとしては、炭素数１〜１２のアルキル基を有するものがあげられ、具体的には、メチル（メタ）アクリレート、エチル（メタ）アクリレート、ｎ−プロピル（メタ）アクリレート、イソプロピル（メタ）アクリレート、ｎ−ブチル（メタ）アクリレート、イソブチル（メタ）アクリレート、ペンチル（メタ）アクリレート、シクロヘキシル（メタ）アクリレート、２−エチルヘキシル（メタ）アクリレート、ｎ−オクチル（メタ）アクリレート、イソオクチル（メタ）アクリレート、ラウリル（メタ）アクリレートなどが挙げられる。これらは単独または２種類以上組み台わせて用いることができる。
【００１２】
上記（メタ）アクリル酸エステルの外に、他の不飽和二重結合を有する単量体、例えば、オレフィン系、ビニル系（アクリル系を除く）等の単量体、例えば、エチレン、酢酸ビニル、スチレン等を共重合成分として含有させることもできる。これら他の不飽和二重結合を有する単量体は、２０重量％以下の範囲で含有させることができる。
【００１３】
また、（メタ）アクリル系樹脂には官能基を有する単量体を含有させる。これにより上記（メタ）アクリル酸エステルと官能基を有する単量体が共重合し、官能基を有する（メタ）アクリル系樹脂を得ることができる。（メタ）アクリル系樹脂に官能基を有する単量体を含有させることによって、該官能基と後述する架橋剤が反応して（メタ）アクリル系樹脂を架橋させることが可能になる。上記官能基を有する単量体としては、（メタ）アクリル酸、マレイン酸、イタコン酸、クロトン酸等のカルボキシル基を有する脂肪族不飽和カルボン酸が挙げられる。該脂肪族不飽和カルボン酸は、高分子量体と低分子量体との混合物からなる（メタ）アクリル系樹脂中に５重量％以下とすることが必要であり、３．５重量％以下の範囲で含有させることが好ましい。５重量％より多い場合では、粘着層に含有させた染料が退色しやすく、剥離した後に糊残りが生じやすい。その他の官能基を有する単量体としては、（メタ）アクリル酸−２−ヒドロキシエチルエステル、（メタ）アクリル酸−２−ヒドロキシプロピルエステル、２−ヒドロキシビニルエーテル等のヒドロキシル基を有するもの、Ｎ，Ｎ−ジメチルアミノエチル（メタ）アクリレート、Ｎ−ターシャリーブチルアミノエチル（メタ）アクリレート、アミノエチル（メタ）アクリレート、ジメチルアミノプロピル（メタ）アクリレート等のアミノ基を有するもの、グリシジルアクリレート、グリシジルメタクリレート等のエポキシ基を有するもの、その他、アクリロニトリルおよびアクリルアミド等があげられ、これらは単独または２種類以上組み合わせて用いることができる。官能基を有する単量体の全含有量は、（メタ）アクリル系樹脂中に２０重量％以下の範囲が好ましい。この中でも特にアクリルアミド等のアマイド基を有する単量体を粘着剤の剥がれや発泡を防止するために含有させる。
【００１４】
上記官能基を有する（メタ）アクリル系樹脂に含有させる架橋剤としては、多官能イソシアネート系架橋剤であるトリレンジイソシアナート、ヘキサメチレンジイソシアナート、トリメチロールプロパン変成トリレンジイソシアナートなど、多官能エポキシ架橋剤であるエチレングリコールジグリシジルエーテル、プロピレングリコールジグリシジルエーテルなど、多官能アジリジン系架橋剤であるＮ，Ｎ’−へキサメチレン−１，６−ビス（１−アジリジンカルボキシアミド）、トリメチロールプロパン−トリ−β−アジリジニルプロピオネート等、金属キレート系架橋剤であるアルミニウムのアセチルアセトン錯体、過酸化物であるベンゾイルパーオキサイド、メラミン系架橋剤等が挙げられる。これらは単独または２種類以上組み合わせて使用することができる。その含有量は、０．０１〜５重量％の範囲が好ましい。
【００１５】
本発明において、高分子量体としては、重量平均分子量２０万〜２００万のものが好ましく、より好ましくは５０万〜２００万、さらに好ましくは７０万〜１５０万のものである。また、低分子量体としては、重量平均分子量１０００〜２０万のものが好ましく、より好ましくは１０００〜１０万、さらに好ましくは１０００〜５万のものである。なお、重量平均分子量はゲルパーミュエーシヨンクロマトグラフィー法にて測定した値である。
【００１６】
また、前記（メタ）アクリル系樹脂を構成する高分子量体のガラス転移温度（Ｔｇ）は−２０℃以下が好ましく、更に好ましくは−３０℃以下、より好ましくは−４０℃以下を有するものであり、一方低分子量体のガラス転移温度（Ｔｇ）は５０℃以上が好ましく、更に好ましくは７０〜２００℃、より好ましくは８０〜１５０℃を有するものである。
【００１７】
本発明において、粘着剤層における高分子量体の好ましい配合割合は、架橋剤を含む全樹脂成分（所望により含有される架橋剤も含む）の５０〜９７重量％の範囲であり、より好ましくは７０〜９７重量％の範囲である。高分子量体の割合が５０重量％未満の場合はアクリル系樹脂の粘着性が発現されにくくなる。本発明において、粘着剤層の特に好ましい樹脂成分の組成は、上記高分子量体が８０〜９７重量％と低分子量体が３〜２０重量％よりなるものである。
【００１８】
また、前記粘着剤層は染料によって自由に着色される。染料としては直接染料、酸性染料、塩基性染料、媒染染料、酸性媒染染料、バット染料、分散染料、反応染料、蛍光増白染料等が挙げられ、単独もしくは2種類以上混合で使用することで目的の着色を行うことが出来る。
また、前記粘着剤層は、上記樹脂成分以外の他の成分が含有されていてもよい。そのような成分としては、可塑剤、シランカップリング剤等の粘着特性改質剤、カーボンブラック、顔料等の着色剤、シリカ、二酸化チタン、アルミナ、金属粉、金属酸化物粉等の無機フィラー、樹脂微粒子等があげられ、それぞれ目的に応じて適宜の量で使用される。
【００１９】
本発明の電子ディスプレイ用着色粘着剤付フィルムは、上記の成分を適当な有機溶剤に添加して得た塗布液を、剥離処理が施された剥離性フィルムの上に塗布した後、形成される粘着剤層の上に光透過性フィルムを重ねて貼り合わせることによって製造することができる。使用に際して剥離性フィルムを剥離して用いればよい。又、本発明の電子ディスプレイ用着色粘着剤付フィルムは、上記の塗布液を直接上記の光透過性フィルムの一面に塗布することによって作製することもできる。形成される粘着剤層の膜厚は、一般に５〜５０μｍの範囲に設定される。
【００２０】
本発明の電子ディスプレイ用着色粘着剤付フィルムは、ガラスおよびプラスチックに対して良好な貼着性を示す。例えば、ガラスとしては、ソーダガラス、カリガラス、ホウ珪酸ガラス等のガラス類、石英、高純度アルミナ等の透明セラミック類等に対して良好な貼着性を示し、プラスチックとしては、ポリエチレン、ポリプロピレン、ポリエーテルエーテルケトン、スチレン、アクリル樹脂、ポリカーボネート、ポリエチレンテレフタレート等に良好な貼着性を示す。
【００２１】
【実施例】
以下、本発明を実施例によって説明する。
＜アクリル系粘着剤の合成＞
製造例１
温度計、撹拌機、還流冷却管、窒素導入管を備えたフラスコ中に、ｎ−ブチルアクリレート９５重量部、アクリル酸５重量部、過酸化ベンゾイル０．３重量部、酢酸エチル４０重量部、トルエン６０重量部を投入し、窒素導入管より窒素を導入してフラスコ内を窒素雰囲気とした。その後、混合物を６５℃に加温して１０時間重合反応を行い、重量平均分子量約１００万、Ｔｇ約−４９℃の高分子量体の溶液を得た。この溶液に固形分が２０重量％となるように酢酸エチルを加え、多官能エポキシ（エチレングリコールジグリシジルエーテル）０．０５重量部を加えて、高分子量体の溶液Ａを得た。
【００２２】
製造例２
温度計、撹拌機、還流冷却管、窒素導入管を備えたフラスコ中に、ｎ−ブチルアクリレート９６．５重量部、アクリル酸３．５重量部、２−ヒドロキシエチルメタクリレート１重量部、アゾビスイソブチロニトリル０．４重量部、酢酸エチル９０重量部、トルエン６０重量部を投入し、窒素導入管より窒素を導入してフラスコ内を窒素雰囲気とした。その後、混合物を６５℃に加温して１０時間重合反応を行い、重量平均分子量約８０万、Ｔｇ約−４８℃の高分子量体の溶液を得た。この溶液にポリイソシアネート（日本ポリウレタン社製、商品名 コロネートＬ）１重量部を加えて、固形分が２０％となるように酢酸エチルを加えて高分子量体の溶液Ｂを得た。
【００２３】
製造例３
温度計、撹拌機、還流冷却管、窒素導入管を備えたフラスコ中に、メタクリル酸メチル９９重量部、アクリル酸１重量部、アゾビスイソブチロニトリル１重量部、酢酸エチル４０重量部、トルエン６０重量部を投入し、窒素導入管より窒素を導入してフラスコ内を窒素雰囲気とした。その後、混合物を８０℃に加温して６時間重合反応を行い、重量平均分子量約２万、Ｔｇ約１０４℃の低分子量体の溶液Ｃを得た。
【００２４】
製造例４
温度計、撹拌機、還流冷却管、窒素導入管を備えたフラスコ中に、メタクリル酸メチル９６重量部、アクリルアミド４重量部、アゾビスイソブチロニトリル１重量部、酢酸エチル４０重量部、トルエン６０重量部を投入し、窒素導入管より窒素を導入しフラスコ内を窒素雰囲気とした。その後、混合物を８０℃に加温して６時間重合反応を行い、重量平均分子量約２万、Ｔｇ約１００℃の低分子量体の溶液Ｄを得た。
【００２５】
製造例５
温度計、撹拌機、還流冷却管、窒素導入管を備えたフラスコ中に、ｎ−ブチルアクリレート９４重量部、アクリル酸６重量部、２−ヒドロキシエチルメタクリレート１重量部、アゾビスイソブチロニトリル０．４重量部、酢酸エチル９０重量部、トルエン６０重量部を投入し、窒素導入管より窒素を導入してフラスコ内を窒素雰囲気とした。その後、混合物を６５℃に加温して１０時間重合反応を行い、重量平均分子量約１１０万、Ｔｇ約−５１℃の高分子量体の溶液を得た。このアクリルポリマーの溶液にポリイソシアネート（日本ポリウレタン社製、商品名 コロネートＬ）１重量部を加えて、固形分が２０％となるように酢酸エチルを加えて高分子量体の溶液Ｅを得た。
【００２６】
＜粘着塗工液の作製＞
前記溶液Ａ〜Ｅを用いて下記表１の組み合わせで混合し粘着塗工液（１）〜（５）を作製した。
【００２７】
【表１】
＜粘着剤付きフィルムの作製＞
実施例１
前記粘着塗工液（１）１００重量部に銅フタロシアニンブルー染料０．１重量部を溶解して塗布液を作製した。次にシリコーン樹脂により剥離処理が施された厚さ３８μｍのポリエチレンテレフタレートフィルム（以下、ＰＥＴフィルムという）の一面に乾燥後の厚さが２５μｍになるようアプリケータで上記塗布液を塗工して粘着剤層を形成した。一方、光透過性フィルムとして、片面に低屈折率の物質と高屈折率の物質とを交互に積層されたものよりなる反射防止層を有する厚さ１８８μｍのＰＥＴフィルムを用意し、該フィルムの他面に、上記のＰＥＴフィルムに形成された粘着剤層面を重ねラミネーターで貼り合わせ本発明の粘着剤付フィルムを得た。
【００２９】
実施例２
上記反射防止層を有する厚さ１８８μｍＰＥＴフィルムの代わりに、一面に上記のＰＥＴフィルムと同様の反射防止層を有する厚さ８０μｍのトリアセチルセルロースフィルムを使用した以外は、実施例１と同様にして本発明の粘着剤付フィルムを得た。
【００３０】
実施例３
粘着塗工液（１）の代わりに粘着塗工液（２）を用いた以外は、実施例１と同様にして本発明の粘着剤付フィルムを得た。
実施例４
粘着塗工液（１）の代わりに粘着塗工液（２）を用いた以外は、実施例２と同様にして本発明の粘着剤付フィルムを得た。
【００３５】
比較例１
粘着塗工液（１）の代わりに粘着塗工液（３）を用いた以外は、実施例１と同様にして比較用の粘着剤付フィルムを得た。
比較例２
粘着塗工液（１）の代わりに粘着塗工液（３）を用いた以外は、実施例２と同様にして比較用の粘着剤付フィルムを得た。
【００３６】
比較例３
粘着塗工液（１）の代わりに粘着塗工液（４）を用いた以外は、実施例１と同様にして比較用の粘着剤付フィルムを得た。
比較例４
粘着塗工液（１）の代わりに粘着塗工液（４）を用いた以外は、実施例２と同様にして比較用の粘着剤付フィルムを得た。
【００３７】
比較例５
粘着塗工液（１）の代わりに粘着塗工液（５）を用いた以外は、実施例１と同様にして比較用の粘着剤付フィルムを得た。
比較例６
粘着塗工液（１）の代わりに粘着塗工液（５）を用いた以外は、実施例２と同様にして比較用の粘着剤付フィルムを得た。
【００３８】
比較例７
粘着塗工液（１）の代わりに、前記高分子量体の溶液Ａ９０重量部とタッキファイヤー（軟化点１００℃のα−メチルスチレン樹脂）１０重量部との混合物を用いた以外は、実施例１と同様にして比較用の粘着剤付フィルムを得た。
比較例８
粘着塗工液（１）の代わりに、前記高分子量体の溶液Ａ９０重量部とタッキファイヤー（軟化点１００℃のα−メチルスチレン樹脂）１０重量部との混合物を用いた以外は、実施例２と同様にして比較用の粘着剤付フィルムを得た。
【００３９】
次に前記実施例および比較例で得られた粘着剤付フィルムを、２００×３００ｍｍのサイズに切り出し、アクリル板及びガラス板にラミネーターで貼合した後、以下の試験を行った。
（耐高温試験）
１００℃（ＤＲＹ）の恒温槽に１０００時間投入し、試験終了後の粘着剤付フィルムの外観を目視にて評価した。
（耐高温高湿試験）
６０℃／９５％ＲＨの恒温恒湿槽に１０００時間投入し、試験終了後の粘着剤付フィルムの外観を目視にて評価した。
【００４０】
上記耐高温試験及び耐高温高湿試験後の粘着剤付フィルムの外観は次の基準に基づいて評価した。
（粘着剤層の剥がれ）○：剥がれなし、△：外周部に外観を阻害しない程度の剥がれ有り、×：外観を阻害する剥がれ有り
（粘着剤層の発泡）○：発泡なし、△：外観を阻害しない程度の発泡有り、×：外観を阻害する発泡有り
（染料の退色）○：退色なし、△：若干の退色有り、×：完全に退色
（粘着剤付フィルムの透明性）○：透明性良好、△：○より透明性悪い、×：△より透明性悪い
【００４１】
次に実施例および比較例で得られた粘着剤付フィルムを、２５×１５０ｍｍのサイズに切り出し、アクリル板及びガラス板に手押しローラー（重量２ｋｇ）で貼合せた後、前記耐高温試験及び耐高温高湿試験と同様の試験条件下においた。その後粘着剤付フィルムを手で剥離し、糊残り状態を評価した。
（評価基準）○：糊残りなし、△：面積にして１０％程度の糊残り有り、×：全面糊残り有り
【００４２】
前記の試験結果を表２にまとめて示した。表２から明らかなように本発明の粘着剤付フィルムでは、耐高温試験及び耐高温高湿試験共に剥がれ、発泡、退色、透明性及び糊残りになんら問題のない結果であった。これに対し比較例の粘着剤付フィルムでは剥がれ、発泡、退色、透明性及び糊残りのいずれかに問題のある結果であった。
【００４３】
【表２】
【発明の効果】
本発明の電子ディスプレイ用着色粘着剤付フィルムは、上記の構成を有するから、電子ディスプレイのガラス板及びプレスチック板からなる被着体に対しても十分な信頼性をもって貼着することが可能である。すなわち、ＣＲＴやＰＤＰ用前面板に用いられるガラス材料、例えば、ソーダガラス、カリガラス、ホウ珪酸ガラス等のガラス類、石英、高純度アルミナ等の透明セラミック類等に対して良好な貼着性を示し、又、液晶、ＥＬ、ＰＤＰ用前面板に用いられるプラスチック、例えば、ポリエチレン、ポリプロピレン、ポリエーテルエーテルケトン、スチレン、アクリル樹脂、ポリカーボネート、ポリエチレンテレフタレート等に対して良好な貼着性を示す。また、高温及び高温高湿環境下において染料を含有する粘着層の色が退色しにくい。したがって、本発明の着色粘着剤付フィルムは、電子ディスプレイ用として極めて有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film with a colored adhesive for electronic display that can be attached to an electronic display.
[0002]
[Prior art]
In recent years, products using pressure-sensitive adhesives have come to be used in many cases as home appliances and information devices become more functional, smaller and lighter. For example, liquid crystal display panels such as liquid crystal displays, copiers and facsimile machines, CRT (cathode ray tube) with a film attached with chromaticity adjustment, antireflection, and antiglare function, and a near infrared ray and / or electromagnetic wave cut function An adhesive is used for a front protective plate for a plasma display panel (PDP) having a film attached thereto.
[0003]
Specifically, in a CRT such as a television, in combination with the flattening of the screen, a colored sheet is attached to the front of the CRT via an adhesive to color the glass. Also in the PDP, a sheet with an adhesive for color correction and a sheet with an adhesive for antireflection are attached to a resin plate or a glass plate. Conventional pressure-sensitive adhesives in such applications include rubber-based, acrylic-based, polyvinyl ether-based, silicone-based, etc., but rubber-based has problems with aging resistance, and polyvinyl ether-based has problems with heat resistance. Because of its insufficient adhesive strength, acrylic materials were often used.
[0004]
Recently, flat displays such as plasma display (PDP), liquid crystal display (LCD), and electroluminescence display (ELD) have been replaced with glass plates for the purpose of light weight, thinness, breakage resistance, and recycling rate. An electronic display using a plastic plate is also in practical use. However, when the film with the pressure-sensitive adhesive used for the glass plate is bonded to the plastic plate, there is a problem that peeling or foaming occurs at a high temperature or a high temperature and high humidity, thereby obstructing display on the display. Conventionally, in order to solve such problems, as a method for improving the adhesion between the adhesive and the plastic, a tackifier (TF) is added to the adhesive. The tackifier is generally made of a mouth gin-based or petroleum-based substance, and its addition is known to improve the adhesion to the plastic, and can solve problems such as peeling and foaming. However, when a film with an adhesive using these tackifiers is bonded to a glass plate, there is a problem that peeling or foaming occurs at a high temperature or a high temperature and high humidity, thereby hindering display on the display. In addition, the tackifier is likely to bleed under high temperature or high temperature and high humidity, and there are problems such as deterioration of optical characteristics due to white turbidity and reduction of adhesive strength. In particular, in a film with a pressure-sensitive adhesive using a pressure-sensitive adhesive containing a dye, there is a problem that the dye used for coloring fades at a high temperature or a high temperature and high humidity.
[0005]
Therefore, as for the conventional pressure-sensitive adhesive, the actual situation is that there is no pressure-sensitive adhesive having a sufficient function for sticking a light-transmitting film to an electronic display at high temperature or high temperature and high humidity. Therefore, there is a demand for a colored adhesive capable of attaching a light transmissive film to a glass plate and a plastic plate.
[0006]
[Problems to be solved by the invention]
The object of the present invention is to adhere with sufficient reliability to an electronic display having a glass plate and a plastic plate without peeling or foaming of the adhesive layer containing the dye at high temperature or high temperature and high humidity. Another object of the present invention is to provide a light-transmitting film with a colored pressure-sensitive adhesive that can be used and the color of a pressure-sensitive adhesive layer containing a dye does not fade.
[0007]
[Means for Solving the Problems]
The colored adhesive-equipped film for electronic display according to the present invention comprises a pressure-sensitive adhesive layer containing a (meth) acrylic resin and a dye on one surface of the light-transmitting film, and the (meth) acrylic resin is a weight average. It is composed of a high molecular weight body having a molecular weight of 200,000 or more and a low molecular weight body having a weight average molecular weight of less than 200,000 and has a functional group, and at least one of the high molecular weight body and the low molecular weight body has an amide group. Yes, and the (meth) aliphatic unsaturated carboxylic acid in the acrylic resin characterized in that it contains 5 wt% or less.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
First, the light transmissive film which comprises the film with a coloring adhesive for electronic displays of this invention is explained in full detail. The light transmissive film used in the present invention preferably has optical transparency. For example, from the viewpoint of optical properties, strength, economy, etc., cellulose film such as triacetyl cellulose, polycarbonate film, polyethylene terephthalate. Preferred examples include polyester films such as polyethylene films and polyolefin films such as polyethylene and polypropylene. The film thickness of the light transmissive film is generally in the range of 10 to 500 μm, preferably in the range of 25 to 250 μm.
[0009]
The light transmissive film preferably has at least one of a hard coat layer, a conductive layer, an antiglare layer, and an antireflection layer on one surface. Examples of the hard coat layer include general inorganic and organic coating agents. Examples of the conductive layer include vapor deposition of metal or metal oxide, sputtered film, and the like. Examples of the antiglare layer include coating agents for beads-containing resins such as silica particles and acrylic resin particles, and mat treatment. Examples of the antireflection layer include those obtained by alternately laminating a low refractive index substance and a high refractive index substance by coating, vapor deposition, and sputtering.
The pressure-sensitive adhesive layer described below is provided on the opposite surface of the light-transmitting film provided with the hard coat layer, conductive layer, antiglare layer and antireflection layer.
[0010]
Next, the adhesive which comprises the adhesive layer provided in the said light transmissive film is explained in full detail. As the pressure-sensitive adhesive, a (meth) acrylic resin exhibiting adhesiveness at about −40 ° C. to 80 ° C. is used. This (meth) acrylic resin is composed of at least a high molecular weight substance having a high molecular weight and a low molecular weight substance having a low molecular weight. More specifically, it is composed of at least a mixture of a (meth) acrylic resin (high molecular weight body) having a weight average molecular weight of 200,000 or more and a (meth) acrylic resin (low molecular weight body) having a weight average molecular weight of less than 200,000. The These (meth) acrylic resins are homopolymers and preferably copolymers of (meth) acrylic acid esters.
[0011]
Examples of the (meth) acrylic acid ester used as a monomer for the (meth) acrylic resins having different molecular weights include those having an alkyl group having 1 to 12 carbon atoms, specifically, methyl (meth) acrylate. , Ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (Meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate and the like can be mentioned. These can be used alone or in combination of two or more.
[0012]
In addition to the above (meth) acrylic acid ester, other monomers having an unsaturated double bond, for example, olefin-based, vinyl-based (excluding acrylic) monomers, for example, ethylene, vinyl acetate, Styrene or the like can also be contained as a copolymerization component. These other monomers having an unsaturated double bond can be contained in the range of 20% by weight or less.
[0013]
The (meth) acrylic resin contains a monomer having a functional group. Thereby, the (meth) acrylic acid ester and the monomer having a functional group are copolymerized to obtain a (meth) acrylic resin having a functional group. By containing a monomer having a functional group in the (meth) acrylic resin, the functional group and a crosslinking agent described later react to crosslink the (meth) acrylic resin. Examples of the monomer having a functional group include aliphatic unsaturated carboxylic acids having a carboxyl group such as (meth) acrylic acid, maleic acid, itaconic acid, and crotonic acid. The aliphatic unsaturated carboxylic acid needs to be 5% by weight or less in a (meth) acrylic resin composed of a mixture of a high molecular weight substance and a low molecular weight substance, and is in the range of 3.5 % by weight or less. It is preferable to contain. When the amount is more than 5% by weight, the dye contained in the pressure-sensitive adhesive layer tends to fade, and an adhesive residue tends to occur after peeling. Other monomers having a functional group include those having a hydroxyl group such as (meth) acrylic acid-2-hydroxyethyl ester, (meth) acrylic acid-2-hydroxypropyl ester, 2-hydroxyvinyl ether, N, N-dimethylaminoethyl (meth) acrylate, N-tertiary butylaminoethyl (meth) acrylate, aminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate and other amino groups, glycidyl acrylate, glycidyl methacrylate, etc. In addition, those having an epoxy group, acrylonitrile, acrylamide and the like can be mentioned, and these can be used alone or in combination of two or more. The total content of monomers having functional groups is preferably in the range of 20% by weight or less in the (meth) acrylic resin. Among these, in particular, a monomer having an amide group such as acrylamide is contained in order to prevent peeling or foaming of the pressure-sensitive adhesive.
[0014]
As the crosslinking agent to be included in the (meth) acrylic resin having the above functional group, polyfunctional isocyanate-based tolylene diisocyanate, hexamethylene diisocyanate, trimethylolpropane modified tolylene diisocyanate, etc. N, N′-hexamethylene-1,6-bis (1-aziridinecarboxyamide), trimethylolpropane, which is a polyfunctional aziridine-based crosslinking agent, such as epoxy glycol crosslinker, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, etc. -Tri-β-aziridinylpropionate and the like, acetylacetone complex of aluminum which is a metal chelate crosslinking agent, benzoyl peroxide which is a peroxide, melamine crosslinking agent and the like. These can be used alone or in combination of two or more. The content is preferably in the range of 0.01 to 5% by weight.
[0015]
In the present invention, the high molecular weight body preferably has a weight average molecular weight of 200,000 to 2,000,000, more preferably 500,000 to 2,000,000, still more preferably 700,000 to 1,500,000. Moreover, as a low molecular weight body, a thing of 1000-200000 of a weight average molecular weight is preferable, More preferably, it is 1000-100,000, More preferably, it is 1000-50,000. The weight average molecular weight is a value measured by gel permeation chromatography.
[0016]
Further, the glass transition temperature (Tg) of the high molecular weight substance constituting the (meth) acrylic resin is preferably −20 ° C. or lower, more preferably −30 ° C. or lower, more preferably −40 ° C. or lower. On the other hand, the glass transition temperature (Tg) of the low molecular weight body is preferably 50 ° C. or higher, more preferably 70 to 200 ° C., and more preferably 80 to 150 ° C.
[0017]
In the present invention, the preferable blending ratio of the high molecular weight body in the pressure-sensitive adhesive layer is in the range of 50 to 97% by weight of the total resin component including the crosslinking agent (including the crosslinking agent optionally contained), more preferably 70. It is in the range of -97% by weight. When the ratio of the high molecular weight is less than 50% by weight, the tackiness of the acrylic resin is hardly expressed. In the present invention, a particularly preferable resin component composition of the pressure-sensitive adhesive layer is such that the high molecular weight body comprises 80 to 97% by weight and the low molecular weight body comprises 3 to 20% by weight.
[0018]
The pressure-sensitive adhesive layer is freely colored with a dye. Examples of the dye include direct dyes, acid dyes, basic dyes, mordant dyes, acid mordant dyes, vat dyes, disperse dyes, reactive dyes, fluorescent whitening dyes, and the like. Can be colored.
Moreover, the said adhesive layer may contain other components other than the said resin component. Examples of such components include plasticizers, adhesive property modifiers such as silane coupling agents, colorants such as carbon black and pigments, inorganic fillers such as silica, titanium dioxide, alumina, metal powder, metal oxide powder, Examples thereof include resin fine particles, and each is used in an appropriate amount depending on the purpose.
[0019]
The film with a colored pressure-sensitive adhesive for electronic display of the present invention is formed after applying a coating solution obtained by adding the above components to a suitable organic solvent on a release film that has been subjected to a release treatment. It can manufacture by laminating | stacking and laminating | stacking a light-transmitting film on an adhesive layer. In use, the peelable film may be peeled off. Moreover, the colored adhesive-attached film for an electronic display of the present invention can also be produced by directly applying the above coating liquid to one surface of the above light transmissive film. The film thickness of the pressure-sensitive adhesive layer to be formed is generally set in the range of 5 to 50 μm.
[0020]
The film with a colored adhesive for electronic displays of the present invention exhibits good adhesion to glass and plastic. For example, glass has good adhesion to glass such as soda glass, potash glass and borosilicate glass, transparent ceramics such as quartz and high-purity alumina, and plastics include polyethylene, polypropylene, and poly Good adhesion to ether ether ketone, styrene, acrylic resin, polycarbonate, polyethylene terephthalate, etc.
[0021]
【Example】
Hereinafter, the present invention will be described by way of examples.
<Synthesis of acrylic adhesive>
Production Example 1
In a flask equipped with a thermometer, stirrer, reflux condenser, and nitrogen inlet tube, 95 parts by weight of n-butyl acrylate, 5 parts by weight of acrylic acid, 0.3 part by weight of benzoyl peroxide, 40 parts by weight of ethyl acetate, toluene 60 parts by weight were charged, and nitrogen was introduced from a nitrogen introduction tube to create a nitrogen atmosphere in the flask. Thereafter, the mixture was heated to 65 ° C. and subjected to a polymerization reaction for 10 hours to obtain a high molecular weight solution having a weight average molecular weight of about 1,000,000 and a Tg of about −49 ° C. Ethyl acetate was added to this solution so that the solid content was 20% by weight, and 0.05 part by weight of polyfunctional epoxy (ethylene glycol diglycidyl ether) was added to obtain a high molecular weight solution A.
[0022]
Production Example 2
In a flask equipped with a thermometer, stirrer, reflux condenser, and nitrogen inlet tube, 96.5 parts by weight of n-butyl acrylate, 3.5 parts by weight of acrylic acid, 1 part by weight of 2-hydroxyethyl methacrylate, azobisiso 0.4 parts by weight of butyronitrile, 90 parts by weight of ethyl acetate, and 60 parts by weight of toluene were added, and nitrogen was introduced from a nitrogen introduction tube to make the inside of the flask a nitrogen atmosphere. Thereafter, the mixture was heated to 65 ° C. and polymerized for 10 hours to obtain a high molecular weight solution having a weight average molecular weight of about 800,000 and a Tg of about −48 ° C. To this solution, 1 part by weight of polyisocyanate (product name: Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) was added, and ethyl acetate was added so that the solid content was 20% to obtain a high molecular weight solution B.
[0023]
Production Example 3
In a flask equipped with a thermometer, stirrer, reflux condenser, and nitrogen inlet tube, 99 parts by weight of methyl methacrylate, 1 part by weight of acrylic acid, 1 part by weight of azobisisobutyronitrile, 40 parts by weight of ethyl acetate, toluene 60 parts by weight were charged, and nitrogen was introduced from a nitrogen introduction tube to create a nitrogen atmosphere in the flask. Thereafter, the mixture was heated to 80 ° C. and subjected to a polymerization reaction for 6 hours to obtain a low molecular weight solution C having a weight average molecular weight of about 20,000 and a Tg of about 104 ° C.
[0024]
Production Example 4
In a flask equipped with a thermometer, stirrer, reflux condenser, and nitrogen inlet tube, 96 parts by weight of methyl methacrylate, 4 parts by weight of acrylamide, 1 part by weight of azobisisobutyronitrile, 40 parts by weight of ethyl acetate, 60 parts of toluene A weight part was charged, nitrogen was introduced from a nitrogen introduction tube, and the atmosphere in the flask was changed to a nitrogen atmosphere. Thereafter, the mixture was heated to 80 ° C. and polymerized for 6 hours to obtain a low molecular weight solution D having a weight average molecular weight of about 20,000 and a Tg of about 100 ° C.
[0025]
Production Example 5
In a flask equipped with a thermometer, stirrer, reflux condenser, and nitrogen inlet tube, 94 parts by weight of n-butyl acrylate, 6 parts by weight of acrylic acid, 1 part by weight of 2-hydroxyethyl methacrylate, azobisisobutyronitrile 0 4 parts by weight, 90 parts by weight of ethyl acetate, and 60 parts by weight of toluene were introduced, and nitrogen was introduced from a nitrogen introduction tube to make the inside of the flask a nitrogen atmosphere. Thereafter, the mixture was heated to 65 ° C. and polymerized for 10 hours to obtain a high molecular weight solution having a weight average molecular weight of about 1.1 million and Tg of about −51 ° C. 1 part by weight of polyisocyanate (product name: Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) was added to the acrylic polymer solution, and ethyl acetate was added so that the solid content was 20%, thereby obtaining a high molecular weight solution E.
[0026]
<Preparation of adhesive coating solution>
Adhesive coating liquids (1) to ( 5 ) were prepared by mixing the solutions A to E in the combinations shown in Table 1 below.
[0027]
[Table 1]
<Preparation of film with adhesive>
Example 1
A coating solution was prepared by dissolving 0.1 parts by weight of a copper phthalocyanine blue dye in 100 parts by weight of the adhesive coating solution (1). Next, the above coating solution was applied with an applicator on one side of a 38 μm-thick polyethylene terephthalate film (hereinafter referred to as “PET film”) that had been peeled off with a silicone resin so that the thickness after drying was 25 μm. An agent layer was formed. On the other hand, as a light transmissive film, a PET film having a thickness of 188 μm having an antireflection layer made of a material in which a low refractive index substance and a high refractive index substance are alternately laminated on one side is prepared. The pressure-sensitive adhesive layer surface formed on the PET film was overlapped on the surface and bonded with a laminator to obtain a film with pressure-sensitive adhesive of the present invention.
[0029]
Example 2
Instead of the 188 μm-thick PET film having the antireflection layer, a 80 μm-thick triacetylcellulose film having the same antireflection layer as the above PET film was used on the entire surface in the same manner as in Example 1. An inventive adhesive film was obtained.
[0030]
Example 3
A film with the pressure-sensitive adhesive of the present invention was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive coating liquid (2) was used instead of the pressure-sensitive adhesive coating liquid (1).
Example 4
A film with the pressure-sensitive adhesive of the present invention was obtained in the same manner as in Example 2 except that the pressure-sensitive adhesive coating liquid (2) was used instead of the pressure-sensitive adhesive coating liquid (1).
[0035]
Comparative Example 1
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive coating liquid ( 3 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
Comparative Example 2
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 2 except that the pressure-sensitive adhesive coating liquid ( 3 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
[0036]
Comparative Example 3
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive coating liquid ( 4 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
Comparative Example 4
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 2 except that the pressure-sensitive adhesive coating liquid ( 4 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
[0037]
Comparative Example 5
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive coating liquid ( 5 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
Comparative Example 6
A comparative film with a pressure-sensitive adhesive was obtained in the same manner as in Example 2 except that the pressure-sensitive adhesive coating liquid ( 5 ) was used instead of the pressure-sensitive adhesive coating liquid (1).
[0038]
Comparative Example 7
Example 1 except that a mixture of 90 parts by weight of the high molecular weight solution A and 10 parts by weight of tackifier (α-methylstyrene resin having a softening point of 100 ° C.) was used instead of the adhesive coating liquid (1). In the same manner, a comparative pressure-sensitive adhesive film was obtained.
Comparative Example 8
Example 2 except that a mixture of 90 parts by weight of the high molecular weight solution A and 10 parts by weight of tackifier (α-methylstyrene resin having a softening point of 100 ° C.) was used instead of the adhesive coating solution (1). In the same manner, a comparative pressure-sensitive adhesive film was obtained.
[0039]
Next, the film with pressure-sensitive adhesive obtained in the above Examples and Comparative Examples was cut into a size of 200 × 300 mm and bonded to an acrylic plate and a glass plate with a laminator, and then the following tests were performed.
(High temperature resistance test)
It put into a 100 degreeC (DRY) thermostat for 1000 hours, and evaluated the external appearance of the film with an adhesive after completion | finish of a test visually.
(High temperature and humidity resistance test)
The film was placed in a constant temperature and humidity chamber of 60 ° C./95% RH for 1000 hours, and the appearance of the film with an adhesive after the test was visually evaluated.
[0040]
The appearance of the film with an adhesive after the high temperature resistance test and the high temperature resistance and high humidity test was evaluated based on the following criteria.
(Peeling of the pressure-sensitive adhesive layer) ○: No peeling, Δ: Peeling to the extent that the appearance is not hindered, ×: Peeling that hinders the appearance (foaming of the pressure-sensitive adhesive layer) ○: No foaming, Δ: Appearance Foaming to the extent that it does not hinder, ×: Foaming that hinders appearance (dye fading) ○: No fading, △: Slight fading, ×: Fading completely (transparency of film with adhesive) ○: Transparency Good, △: Poor transparency than ○, ×: Poor transparency than △
Next, the film with pressure-sensitive adhesive obtained in Examples and Comparative Examples was cut into a size of 25 × 150 mm and bonded to an acrylic plate and a glass plate with a hand roller (weight 2 kg), and then the high-temperature resistance test and high-temperature resistance. The test conditions were the same as in the high humidity test. Thereafter, the film with the pressure-sensitive adhesive was peeled off by hand, and the adhesive residue state was evaluated.
(Evaluation criteria) ○: No adhesive residue, △: About 10% adhesive residue in area, ×: Full adhesive residue [0042]
The test results are summarized in Table 2. As can be seen from Table 2, the film with the pressure-sensitive adhesive of the present invention peeled off in both the high temperature resistance test and the high temperature resistance and high humidity test, and there was no problem in foaming, fading, transparency and adhesive residue. On the other hand, the film with the pressure-sensitive adhesive of the comparative example had a problem in any of peeling, foaming, fading, transparency and adhesive residue.
[0043]
[Table 2]
【The invention's effect】
Since the colored adhesive-equipped film for an electronic display of the present invention has the above-described configuration, it can be adhered with sufficient reliability to an adherend composed of a glass plate and a plastic plate of an electronic display. is there. That is, it shows good adhesion to glass materials used for CRT and PDP front plates, for example, glass such as soda glass, potash glass, borosilicate glass, and transparent ceramics such as quartz and high-purity alumina. In addition, it exhibits good adhesion to plastics used for liquid crystal, EL, and front plates for PDP, such as polyethylene, polypropylene, polyetheretherketone, styrene, acrylic resin, polycarbonate, polyethylene terephthalate, and the like. Further, the color of the pressure-sensitive adhesive layer containing a dye is not easily faded under a high temperature and high temperature and high humidity environment. Therefore, the colored adhesive-attached film of the present invention is extremely useful for electronic displays.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001182617A JP4014370B2 (en) | 2001-06-15 | 2001-06-15 | Colored adhesive film for electronic displays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001182617A JP4014370B2 (en) | 2001-06-15 | 2001-06-15 | Colored adhesive film for electronic displays |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002372619A JP2002372619A (en) | 2002-12-26 |
| JP4014370B2 true JP4014370B2 (en) | 2007-11-28 |
Family
ID=19022693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001182617A Expired - Fee Related JP4014370B2 (en) | 2001-06-15 | 2001-06-15 | Colored adhesive film for electronic displays |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4014370B2 (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263084A (en) * | 2003-03-03 | 2004-09-24 | Nitto Denko Corp | Adhesive for directly sticking filter for plasma display |
| JP2005023133A (en) * | 2003-06-30 | 2005-01-27 | Nitto Denko Corp | Adhesive composition, adhesive layer, filter for plasma display panel, and plasma display panel display device |
| JP4521522B2 (en) * | 2004-11-08 | 2010-08-11 | 綜研化学株式会社 | Optical member and manufacturing method thereof |
| TWI340161B (en) * | 2005-01-19 | 2011-04-11 | Lg Chemical Ltd | Acrylic pressure-sensitive adhesive composition with good re-workability,adhesive sheet,and method of preparing the sheet |
| TWI266902B (en) * | 2005-01-19 | 2006-11-21 | Lg Chemical Ltd | Filter for plasma display panel with good re-workability and plasma display panel comprising the same |
| JP2006232882A (en) * | 2005-02-22 | 2006-09-07 | Nitto Denko Corp | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and double-sided pressure-sensitive adhesive tape |
| TWI400312B (en) * | 2005-04-14 | 2013-07-01 | Sumitomo Chemical Co | Adhesive |
| JP5008870B2 (en) * | 2006-01-12 | 2012-08-22 | 日東電工株式会社 | Adhesive composition and adhesive sheet containing the same |
| JP5008900B2 (en) * | 2006-06-06 | 2012-08-22 | 日東電工株式会社 | Adhesive composition, adhesive sheet and adhesive-attached functional film |
| JP2009541533A (en) * | 2006-06-20 | 2009-11-26 | スリーエム イノベイティブ プロパティズ カンパニー | Adhesive composition, adhesive article, and production method thereof |
| EP2048214B1 (en) * | 2006-07-20 | 2012-01-11 | Soken Chemical & Engineering Co. Ltd., | Pressure-sensitive adhesive composition for pdp front filter and use |
| JP4931197B2 (en) * | 2006-08-24 | 2012-05-16 | リケンテクノス株式会社 | Adhesive composition and adhesive sheet member using the same |
| JP4916930B2 (en) * | 2007-03-27 | 2012-04-18 | 藤森工業株式会社 | Near-infrared shielding adhesive film and optical filter for PDP |
| JP5286692B2 (en) * | 2007-05-29 | 2013-09-11 | 大日本印刷株式会社 | Adhesive composition for optical filter, adhesive layer having optical filter function, and composite filter |
| JP2010254956A (en) * | 2009-03-30 | 2010-11-11 | Dic Corp | Adhesive, adhesive sheet obtained using the same, and method of manufacturing adhesive sheet |
| TW201204771A (en) * | 2010-07-30 | 2012-02-01 | Benq Materials Corp | Adhesive and manufacture method thereof |
| JP5562173B2 (en) * | 2010-08-19 | 2014-07-30 | リンテック株式会社 | Adhesive composition, adhesive and adhesive sheet |
| JP5983198B2 (en) * | 2011-09-09 | 2016-08-31 | 東洋インキＳｃホールディングス株式会社 | Optical pressure-sensitive adhesive, optical pressure-sensitive adhesive sheet, and laminate |
| JP2013199544A (en) * | 2012-03-23 | 2013-10-03 | Lintec Corp | Adhesive composition, adhesive, and adhesive sheet |
| EP2803712A1 (en) * | 2013-05-17 | 2014-11-19 | 3M Innovative Properties Company | Multilayer Pressure Sensitive Adhesive Assembly |
| JP6613818B2 (en) * | 2015-10-30 | 2019-12-04 | 東洋インキＳｃホールディングス株式会社 | Pressure sensitive adhesive and pressure sensitive adhesive film |
| JP6014781B1 (en) * | 2016-03-02 | 2016-10-25 | 積水化学工業株式会社 | Adhesive tape and adhesive tape for fixing electronic device parts |
-
2001
- 2001-06-15 JP JP2001182617A patent/JP4014370B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002372619A (en) | 2002-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4014370B2 (en) | Colored adhesive film for electronic displays | |
| WO2016204154A1 (en) | Polarizing film with pressure-sensitive adhesive layers on both surfaces, and image display device | |
| US9657197B2 (en) | Adhesive, adhesive layer, and adhesive sheet | |
| TWI274779B (en) | Acrylic pressure sensitive adhesive having antistatic property | |
| US20140272201A1 (en) | Pressure-sensitive adhesive, pressure sensitive adhesive layer, pressure-sensitive adhesive sheet, and touch panel | |
| EP2644670A2 (en) | Double-sided adhesive sheet and display device for touch panel including same | |
| US10214666B2 (en) | Optically clear adhesives for durable plastic bonding | |
| JP2003082302A (en) | Film with pigmented adhesive for electronic display | |
| JP2002107507A (en) | Film with adhesive for electronic display | |
| JP2016224307A (en) | Polarization film with adhesive layers on both sides, and image display unit | |
| WO2017216886A1 (en) | Polarizing film with double-sided adhesive layers and image display device | |
| EP2475715B1 (en) | Dual crosslinked tackified pressure sensitive adhesive | |
| WO2019107492A1 (en) | Polarizing film with adhesive layer, and liquid crystal display device | |
| JP2008050459A (en) | Adhesive composition and adhesive sheet member using the same | |
| JP2000313871A (en) | Pressure-sensitive adhesive composition for attaching functional film and image display device | |
| JP5085865B2 (en) | Adhesive sheet | |
| JP7149975B2 (en) | Polarizing film with double-sided adhesive layer and image display device | |
| JP5005264B2 (en) | Adhesive composition, adhesive sheet and adhesive-attached functional film | |
| WO2018164052A1 (en) | Optical member equipped with optically functional layer | |
| WO2021251475A1 (en) | Film mirror laminate and mirror member | |
| JP4499995B2 (en) | Protective film for antireflection layer and optical member with antireflection layer | |
| WO2018164062A1 (en) | Polarizing film with optical functional layer, and liquid crystal display device | |
| WO2018164063A1 (en) | Liquid crystal panel and liquid crystal display device | |
| KR101176423B1 (en) | Color adhesive composition | |
| WO2023190124A1 (en) | Adhesive sheet and light control device using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050221 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050308 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050506 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20061024 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061219 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070904 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070911 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100921 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110921 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110921 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120921 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120921 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130921 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130921 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |