JP2004287199A - Surface protection film - Google Patents
Surface protection film Download PDFInfo
- Publication number
- JP2004287199A JP2004287199A JP2003080699A JP2003080699A JP2004287199A JP 2004287199 A JP2004287199 A JP 2004287199A JP 2003080699 A JP2003080699 A JP 2003080699A JP 2003080699 A JP2003080699 A JP 2003080699A JP 2004287199 A JP2004287199 A JP 2004287199A
- Authority
- JP
- Japan
- Prior art keywords
- protective film
- surface protective
- sensitive adhesive
- pressure
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【0001】
本発明は、例えば、コンピューター、液晶テレビ、カーナビ、携帯電話等のディスプレイ画面等に用いられる偏光板等の物品の加工、実装時における保護用に使用される表面保護フィルムに関する。
【0002】
【従来の技術】
偏光板等の光学用シートの加工、実装時には、当該シートの傷・汚染防止として表面保護フィルムを貼付し、裏面に粘着剤を塗布乾燥し、剥離フィルムを合わせた後、目標とする偏光角度に合わせて裁断し、積層保存されるのが常である。
【0003】
当該ディスプレイ画面に貼付する際には、オートクレーブ等の加熱処理が行われることがあり、表面保護フィルムは熱収縮等を生じない耐熱性を有する必要がある。
【0004】
また、実装後保護の役目を終え剥がす時、剥離帯電を生じやすい。従来は、面積が小さく剥離時の静電気は生じるものの、その帯電圧は問題を生じるほど大きくならず電子部品への影響は少なかった。
最近はディスプレイの大型化により面積も大きくなり、必然的に剥離時の帯電圧も高くなり電子部品を破壊する問題を生じやすくなった。
【0005】
このため、必要に応じて本用途における静電気傷害を避けるために、第四級アンモニウム塩、多価アルコール系誘導体、導電性ポリマー等の水溶性の帯電防止剤が内添、または表面塗工されたフィルムを使用しているが、これらの帯電防止剤は、フィルムまたは粘着剤面側の他側面(背面)に形成されている場合、剥離時の帯電圧を抑制する効果が低い。
【0006】
また、フィルムの粘着剤面側に帯電防止層を形成した場合、帯電防止層は粘着剤と基材フィルムとの中間に形成しなくてはならず帯電防止層が偏光板表面に接触することが出来ない。このため、剥離時の帯電圧を抑制する効果が低い。
【0007】
一方、粘着剤にカーボン、金属系酸化物などを練り込み帯電防止化を行うことが出来るが、隠蔽性が生じてしまい透視性が損なわれ、保護フィルムを貼ったまま外観検査を行う必要不可欠な機能を得ることが出来ない。
【0008】
【発明が解決しようとする課題】
本発明は、前記した問題点を解決するためになされたもので、偏光板等の物品の光学シート用に用いる表面保護フィルムにおける基材の一側面に、粘着層を介して剥離フィルムを貼着してなり、粘着層は、剥離帯電圧が、剥離表面で700V以下になるように帯電防止を施したことにより、電子部品の静電気による破壊を極力防ぎ、なおかつ透視性を損な有ことがなく、しかも、粘着剤を帯電防止化するにあたり透視性を維持し、表面保護フィルムの特性上必要不可欠な透視性を損なわずに外観検査が出来る表面保護フィルムを提供することを目的としている。
【0009】
【課題を解決するための手段】
前記した目的を達成するための本発明の手段は、
偏光板等の物品の光学シート用に用いる表面保護フィルムにおける基材の一側面に、粘着層を介して剥離フィルムを貼着してなり、
前記粘着層は、剥離帯電圧が、剥離表面で700V以下になるように帯電防止を施した表面保護フィルムの構成にある。
【0010】
粘着層は、アクリル系粘着剤に導電性付与剤を含有している。
【0011】
粘着層における導電性付与剤の添加量は、アクリル系粘着剤に対し、2重量%乃至30重量%の混合比にする。
【0012】
粘着層における導電性付与剤は、芳香族炭化水素系、エステル系、ケトン系等の有機溶剤に溶解する物で官能基に水酸基(−OH)を持つイオン導電性ポリマーである。
【0013】
表面保護フィルムの基材は、二軸延伸ポリエチレンテレフタレートフィルムであって、この基材の厚みは16μm乃至50μmに形成させる。
【0014】
粘着剤は、二液硬化型アクリル系粘着剤を固形分として5b/m2 乃至40g/m2 塗工し、JIS Z−2037(粘着テープ試験法)に定められたステンレス製被着板で、剥離抵抗値が0.03N/25mm乃至0.5N/25mmである再剥離性粘着剤を塗工する。
【0015】
全光線・平行光線透過率は80%以上、ヘーズは5%以下の透視性を有する。
【0016】
【発明の実施の形態】
次に、本発明に関する表面保護フィルムの実施の一例を図面に基づいて説明する。
図1は、本発明実施例の表面保護フィルムAの一部を拡大断面して示す一例であり、1は防汚層、2は帯電防止層、3は基材、4aは粘着層4におけるアクリル系粘着剤と導電性付与剤との複合層、5aは剥離フィルム5におけるシリコーン系剥離層、5bは剥離フィルム5における基材層をそれぞれ示す。
【0017】
この表面保護フィルムAは、例えば、パソコン、テレビ等のディスプレイ画面などの偏光板等である物品表面等に貼着して、この偏光板等の物品に貼り付けされる表面保護フィルムAが、前記偏光板等の物品の製造工程中に該偏光板等に付く傷、汚れ防止等の役目を終了した時点で、この偏光板表面(剥離表面)から剥がされる。
【0018】
そして、前記した表面保護フィルムAは、合成樹脂フィルム等の基材3の一側面に、粘着層4である再剥離性二液硬化型アクリル系粘着剤4aが塗工されて、剥離フィルム5が貼着されている。
また、該基材3の他側面には、帯電防止層を用いた層が形成され、なおかつ、その上には、積層時に付着した粘着剤等の異物が用意に拭き取られ、かつ、水洗浄等で簡単に脱落することがないよう、剥離性並びに撥水性を有する防護膜である防汚層1が、公知の任意の塗布方法であるグラビアコート法、メイヤーバーコート法やロールコート法等の方法により形成されている。
この防汚層1は、例えば、長鎖アルキルカーバメイト系やシリコーンアクリレート系櫛形グラフトポリマーなどが用いられる。なお、基材3の他側面に対して設けたこの防汚層1は、必要に応じて形成しない場合もあるもので、適宜設計することができる。
【0019】
前記した粘着層4は、剥離帯電圧が剥離表面で700V以下になるように帯電防止タイプとしてある。
偏光板等の物品の光学用フィルムやこれに用いる表面保護フィルムAの粘着剤はアクリル系が用いられる。
この表面保護フィルムAは物品の剥離表面から剥がされる時、剥離帯電を生じてしまう。この剥離帯電圧が高いと偏光板(物品)を用いたディスプレイのICチップ等の電子部品を破壊して使用不可になり製品の歩留まりを低下させてしまう。この破壊電圧は700V以上で不良発生率が高くなる。このため、表面保護フィルムAの粘着層4における粘着剤を帯電防止化することにより、剥離帯電圧を700V以下に抑えることを目的としている。
【0020】
なお、前記した合成樹脂フィルム等の基材3は、例えば、ポリエチレン・ポリプロピレン・ポリエステル・ポリイミド等を原料とするフィルムが用いられるが、中でも使用時の耐熱性を考慮し、二軸延伸したポリエチレンテレフタレートフィルムが好ましい。
基材フィルムの厚さは16μm乃至50μm程度で、好ましくは25μm乃至38μmが適当である。
これは基材フィルムの厚さが16μm未満のフィルムでは薄すぎて外部からの突起物等による打痕等により偏光板を保護することに難がある外、シワ等なく貼り付けすること及び剥離作業も困難となる。
また、50μmを越えると剛性が大きすぎて浮き無く均一に貼り付けすることが難しい外、保護フィルムの価格構成上、その大半を占める原反フィルムに係る費用が大となり過ぎ、保護フィルムに求められる経済性に難がある。
【0021】
更に、合成樹脂フィルム等の基材3の一側面に用いられる粘着層4の再剥離性二液硬化型アクリル系粘着剤4aは、一般的に絶縁性があり、帯電防止効果がない。
本発明実施例においては、この再剥離性二液硬化型アクリル系粘着剤4aを帯電防止化することにより剥離帯電低減効果を得た。
帯電防止化はアクリル系粘着剤と相溶性の良い、導電性付与剤を用いることにより効果が得られる。これは、アクリル系粘着剤が有機溶剤に溶けやすく、その有機溶剤に溶けやすい導電性付与剤を用いることにより均一に分散した透視性の良い粘着層が得られる。
前記導電性付与剤の添加量は、アクリル系粘着剤に対し2重量%乃至30重量%の混合比であって、好ましくは5重量%乃至20重量%である。
導電性付与剤の混合比が2重量%以下では帯電防止効果が得られず、また、30重量%以上では、粘着剤の本来の物性が損なわれ接着力の低下やブリードアウトによる被着体表面への汚染等を生じてしまう。
また、導電性付与剤はアクリル系粘着剤に対し非常に高価なため費用が大となり過ぎ、保護フィルムに求められる経済性に難がある。
【0022】
この導電性付与剤は、アクリル系と相溶性の良いイオン伝導性の導電性付与剤である。ポリマーは水酸基を持ち、アクリル系粘着剤と同様にイソシアネート系硬化剤等により容易に硬化させることができ、ブリードアウトしにくい。
更に、この粘着層における導電性付与剤は、芳香族炭化水素系、エステル系、ケトン系等の有機溶剤に簡単に溶解する物で官能基に水酸基(−OH)を持つイオン導電性ポリマーである。
この構成により、透明性が良く外観検査等を妨げずなおかつ帯電防止等の効果が得られる。
【0023】
再剥離性二液硬化型アクリル系粘着剤4aは、二液硬化型アクリル系粘着剤を固形分として5g/m2 乃至40g/m2 塗工し、JIS Z−2037(粘着テープ試験法)に定められたステンレス製被着板で、剥離抵抗値が0.03N/25mm乃至0.5N/25mmであり、好ましくは0.05N/25mm乃至0.3N/25mmである再剥離性粘着剤を塗工してある。
粘着剤塗工量が5g/m2 未満では、被着体表面に凹凸がある場合充分接着させることができずに浮きあがってしまい保護フィルムとして機能せず、また粘着剤塗工量が40g/m2 を越えた場合には剥離抵抗値が0.5N/25mmを越えてしまい、本用途である保護の機能終了後、剥離抵抗大となり被着体を折り曲げてしまったり、除去作業能率を低下させてしまう。
【0024】
更に、再剥離性二液硬化型アクリル系粘着剤4aの他側面には、シリコーン系離型剤5aを塗工させて、二軸延伸ポリエチレンテレフタレートフィルム5bからなる剥離フィルム5を貼着してある。
そして、この表面保護フィルムAは剥離フィルム5が貼着されて、円筒状に巻かれたロール状に形成されている。
【0025】
なお、本発明実施例における表面保護フィルムAは、全光線・平行光線透過率は80%以上、ヘーズは5%以下の透視性を有するものである。
全光線・平行光線透過率が80%未満でヘーズの透視性が5%以上であると、透過性が悪く、外観検査をする上で著しい阻害となる等の問題点がある。
前記した全光線透過率は、全透過光を指し、平行光線透過率は、全透過光から拡散透過光を除いた平行に入射した透過光の全透過光に対する割合を表すものである。
また、ヘーズとは、曇価または曇り度(%)を表すもので、測定器により、ヘーズ(%)=拡散透過率/全光線透過率×100 の数式により算出される。
【0026】
〔実施例1〕
偏光板等の光学シート用に用いる表面保護フィルムにおける基材の一側面に、粘着層を介して剥離フィルムを貼着してなり、前記粘着層には、2−エチルヘキシルアクリレート/メチルメタアクリレート/酢酸ビニル/ヒドロキシエチルメタアクリレート/アクリル酸の各モノマーを重量で40/40/16/1/3比で配合し、2.2−azobis−isobutylonitrileを触媒とし、窒素気流下、酢酸エチル中で重合して得た重合度Mw=70−80万、固形分30%の再剥離型アクリル系粘着剤を用い、導電性付与剤として芳香族炭化水素系、エステル系、ケトン系等の有機溶剤に簡単に溶解する物で官能基に水酸基(−OH)を持つイオン導電性ポリマーを重量比15%を配合し、さらにトリレンジイソシアネートを重量比で100:5に配合し、38μmの二軸延伸ポリエチレンテレフタレートフィルム3の片面に固形分で25g/m2 塗工、100℃、2分間乾燥する。
次に、シリコーン系離型剤(5a)を塗工してなる25μm厚の二軸延伸ポリエステル(5b)をベースとする剥離フィルム5と貼り合わせ、巻き取り状の表面保護フィルムAを得た。
【0027】
〔実施例2〕
基材フィルムの帯電防止層の上に実施例1で用いた粘着剤を形成した。
【0028】
〔実施例3〕
両面に帯電防止層を形成した基材フィルムの片側帯電防止層の上に実施例1で用いた粘着剤を形成した。
【0029】
〔比較例1〕…図2(a)
実施例1と同様に作成したアクリル系粘着剤のみを塗工し、導電性付与剤を未添加のものを用いて表面保護フィルムB1を作成した。
【0030】
〔比較例2〕
実施例1の導電性付与剤の代わりに第四級アンモニウム塩を用いて表面保護フィルムを作成した。
【0031】
〔比較例3〕
実施例1の導電性付与剤の代わりに有機溶剤に溶けにくい水溶性導電性ポリマーを用いて表面保護フィルムを作成した。
【0032】
〔比較例4〕…図2(b)
比較例1のアクリル系粘着剤を二軸延伸ポリエチレンテレフタレートフィルム上の帯電防止層の上に塗布した物を用いて表面保護フィルムB2を作成した。
【0033】
〔比較例5〕…図2(c)
比較例1のアクリル系粘着剤を両面に帯電防止層を形成した二軸延伸ポリエチレンテレフタレートフィルム上の片側帯電防止層の上に塗布した物を用いて表面保護フィルムB3を作成した。
【0034】
【表1】
*)
剥離帯電圧(V):A4サイズ AG(アンチグレア)処理偏光板表面に保護フィルムを貼り合わせ、剥離速度40m/min、剥離角度180゜にて剥がした後の偏光板(剥離)表面を、応答速度20m/sec以上の振動容量方式の静電気測定器を用いて測定した。
【0035】
【発明の効果】
本発明は、偏光板等の物品の光学用シートの保護に用いるフィルムで、傷防止等の保護の役目を終了した時点で剥がされる時、剥離帯電(静電気等)により組み込まれた電子部品の破壊を防ぐと共に、透視性を損なわない。
【図面の簡単な説明】
【図1】本発明に関する表面保護フィルムの一部を拡大して示す断面図である。
【図2】比較例として掲げた各表面保護フィルムの一部を拡大して示す断面図である。
【符号の説明】
A…表面保護フィルム.2…帯電防止層.3…基材.4…粘着層.4a…アクリル系粘着剤+導電性付与剤.5…剥離フィルム.5a…剥離フィルムのシリコン系剥離層.5b…剥離フィルムの基材層.[0001]
The present invention relates to a surface protective film used for processing and mounting articles such as polarizing plates used for display screens of computers, liquid crystal televisions, car navigation systems, mobile phones, and the like.
[0002]
[Prior art]
When processing and mounting optical sheets such as polarizing plates, apply a surface protective film to prevent scratches and contamination of the sheet, apply an adhesive on the back side, dry and attach a release film, and then adjust to the target polarization angle. They are usually cut together and stored in layers.
[0003]
When affixing to the display screen, a heat treatment such as an autoclave may be performed, and the surface protective film needs to have heat resistance that does not cause heat shrinkage or the like.
[0004]
In addition, when peeling after finishing the role of protection after mounting, peeling electrification easily occurs. In the past, although the area was small and static electricity was generated at the time of peeling, the charged voltage was not so large as to cause a problem and had little effect on electronic components.
Recently, the area of the display has been increased due to an increase in the size of the display, and the charged voltage at the time of peeling has inevitably increased.
[0005]
For this reason, if necessary, a water-soluble antistatic agent such as a quaternary ammonium salt, a polyhydric alcohol derivative, or a conductive polymer was internally added or surface-coated to avoid electrostatic damage in this application. Although a film is used, when these antistatic agents are formed on the other surface (back surface) of the film or the pressure-sensitive adhesive surface side, the effect of suppressing the charged voltage at the time of peeling is low.
[0006]
When an antistatic layer is formed on the pressure-sensitive adhesive side of the film, the antistatic layer must be formed between the pressure-sensitive adhesive and the base film, and the antistatic layer may come into contact with the polarizing plate surface. Can not. Therefore, the effect of suppressing the charged voltage at the time of peeling is low.
[0007]
On the other hand, carbon, metal-based oxides, etc. can be kneaded into the pressure-sensitive adhesive to provide antistatic properties. However, opacity is produced and transparency is impaired, and it is essential to perform an appearance inspection with the protective film attached. I cannot get the function.
[0008]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-mentioned problems, and a release film is attached via an adhesive layer to one side surface of a substrate in a surface protective film used for an optical sheet of an article such as a polarizing plate. The adhesive layer is provided with an antistatic property so that the peeling voltage is 700 V or less at the peeling surface, thereby preventing destruction of electronic components due to static electricity as much as possible and without impairing transparency. In addition, it is an object of the present invention to provide a surface protective film capable of maintaining a transparent property when the pressure-sensitive adhesive is made to have an antistatic property and performing an appearance inspection without impairing a transparent property indispensable for the properties of the surface protective film.
[0009]
[Means for Solving the Problems]
Means of the present invention for achieving the above-mentioned object,
On one side of the substrate in the surface protective film used for the optical sheet of an article such as a polarizing plate, a release film is adhered via an adhesive layer,
The pressure-sensitive adhesive layer has a constitution of a surface protective film which is antistatic so that a peeling voltage becomes 700 V or less on a peeling surface.
[0010]
The pressure-sensitive adhesive layer contains an acrylic pressure-sensitive adhesive and a conductivity-imparting agent.
[0011]
The addition amount of the conductivity-imparting agent in the pressure-sensitive adhesive layer is set to a mixing ratio of 2% by weight to 30% by weight with respect to the acrylic pressure-sensitive adhesive.
[0012]
The conductivity-imparting agent in the adhesive layer is an ion-conductive polymer having a hydroxyl group (-OH) as a functional group, which is dissolved in an organic solvent such as an aromatic hydrocarbon, an ester or a ketone.
[0013]
The base material of the surface protection film is a biaxially stretched polyethylene terephthalate film, and the thickness of the base material is 16 μm to 50 μm.
[0014]
The pressure-sensitive adhesive is a two-part curable acrylic pressure-sensitive adhesive applied as a solid content of 5 b / m 2 to 40 g / m 2 , and is a stainless steel adherend plate specified in JIS Z-2037 (adhesive tape test method). A re-peelable pressure-sensitive adhesive having a peel resistance of 0.03 N / 25 mm to 0.5 N / 25 mm is applied.
[0015]
Total light / parallel light transmittance is 80% or more, and haze is 5% or less.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the surface protection film according to the present invention will be described with reference to the drawings.
FIG. 1 is an example showing an enlarged cross section of a part of the surface protective film A of the embodiment of the present invention, wherein 1 is an antifouling layer, 2 is an antistatic layer, 3 is a substrate, and 4a is an acrylic 5a indicates a silicone-based release layer in the
[0017]
The surface protective film A is, for example, affixed to the surface of an article such as a polarizing plate such as a display screen of a personal computer or a television, and the like. At the time when the role of preventing scratches and stains on the polarizing plate or the like has been completed during the manufacturing process of the article such as the polarizing plate, the polarizing plate is peeled off from its surface (peeling surface).
[0018]
In the surface protective film A, a removable two-part curable acrylic pressure-sensitive adhesive 4a, which is a pressure-sensitive
On the other side of the
The
[0019]
The above-mentioned
An acrylic film is used as an optical film of an article such as a polarizing plate or an adhesive of the surface protective film A used for the optical film.
When the surface protective film A is peeled off from the release surface of the article, peeling electrification occurs. If the peeling voltage is high, electronic components such as an IC chip of a display using a polarizing plate (article) are destroyed and cannot be used, resulting in a decrease in product yield. When the breakdown voltage is 700 V or more, the defect occurrence rate increases. Therefore, the purpose of the present invention is to prevent the pressure-sensitive adhesive in the pressure-
[0020]
As the
The thickness of the substrate film is about 16 μm to 50 μm, preferably 25 μm to 38 μm.
This is because a base film having a thickness of less than 16 μm is too thin to protect the polarizing plate by dents or the like caused by external projections. Will also be difficult.
On the other hand, if the thickness exceeds 50 μm, the rigidity is too large and it is difficult to apply the film uniformly without lifting. In addition, due to the price structure of the protective film, the cost of the raw film that occupies most of the cost is too large, which is required for the protective film. There is difficulty in economy.
[0021]
Furthermore, the removable two-part curable acrylic pressure-
In the examples of the present invention, the removable two-part curable acrylic pressure-
The antistatic effect can be obtained by using a conductivity-imparting agent having good compatibility with the acrylic pressure-sensitive adhesive. This is because the acrylic pressure-sensitive adhesive is easily dissolved in an organic solvent, and the use of a conductivity-imparting agent that is easily soluble in the organic solvent provides a uniformly dispersed pressure-sensitive adhesive layer having good transparency.
The amount of the conductive agent added is 2 to 30% by weight, preferably 5 to 20% by weight based on the acrylic pressure-sensitive adhesive.
If the mixing ratio of the conductivity-imparting agent is 2% by weight or less, the antistatic effect cannot be obtained, and if the mixing ratio is 30% by weight or more, the original physical properties of the pressure-sensitive adhesive are impaired, and the surface of the adherend is reduced due to a decrease in adhesive strength or bleed-out. Pollution and so on.
Further, since the conductivity-imparting agent is much more expensive than the acrylic pressure-sensitive adhesive, the cost becomes too large, and there is a difficulty in economy required for the protective film.
[0022]
The conductivity-imparting agent is an ion-conductivity-imparting conductivity-imparting agent having good compatibility with an acrylic resin. The polymer has a hydroxyl group, and can be easily cured by an isocyanate-based curing agent or the like similarly to the acrylic pressure-sensitive adhesive, and hardly bleeds out.
Further, the conductivity-imparting agent in the adhesive layer is an ion-conductive polymer having a hydroxyl group (-OH) as a functional group, which is easily dissolved in an organic solvent such as an aromatic hydrocarbon, an ester or a ketone. .
With this configuration, it is possible to obtain an effect such as good anti-static property without hindering the appearance inspection and the like with good transparency.
[0023]
The removable two-component curable acrylic pressure-
When the amount of the adhesive applied is less than 5 g / m 2 , if the surface of the adherend has irregularities, it cannot be adhered sufficiently and floats up and does not function as a protective film, and the amount of the adhesive applied is 40 g / m 2. peel resistance value when exceeding the m 2 is will exceed the 0.5 N / 25 mm, after finishing the function of protecting a present application, or worse bending the adherend becomes peeling resistance is large, lowering the removing work efficiency Let me do it.
[0024]
Further, a
The surface protection film A is formed in a roll shape with a
[0025]
The surface protective film A in the examples of the present invention has a total light / parallel light transmittance of 80% or more and a haze of 5% or less.
If the total light / parallel light transmittance is less than 80% and the transparency of the haze is 5% or more, there is a problem in that the transmittance is poor, which significantly impairs the appearance inspection.
The above-described total light transmittance indicates total transmitted light, and the parallel light transmittance indicates a ratio of parallel incident transmitted light to total transmitted light excluding diffuse transmitted light from total transmitted light.
The haze represents haze value or haze (%), and is calculated by a measuring instrument according to a formula of haze (%) = diffuse transmittance / total light transmittance × 100.
[0026]
[Example 1]
A release film is adhered to one side surface of a substrate in a surface protective film used for an optical sheet such as a polarizing plate via an adhesive layer, and the adhesive layer is provided with 2-ethylhexyl acrylate / methyl methacrylate / acetic acid. Each monomer of vinyl / hydroxyethyl methacrylate / acrylic acid was blended in a ratio of 40/40/16/1/3 by weight, and polymerized in ethyl acetate under a nitrogen stream using 2.2-azobis-isobutylonitrile as a catalyst. Using a removable acrylic pressure-sensitive adhesive with a degree of polymerization Mw of 700-800,000 and a solid content of 30%, and can be easily applied to organic solvents such as aromatic hydrocarbons, esters, and ketones as conductivity-imparting agents. 15% by weight of an ion conductive polymer having a hydroxyl group (-OH) as a functional group in a dissolvable substance, and further tolylene diisocyanate In an amount ratio of 100: blended with 5, 25 g / m 2 coating with solids on one side of a biaxially stretched
Next, it was bonded to a
[0027]
[Example 2]
The adhesive used in Example 1 was formed on the antistatic layer of the substrate film.
[0028]
[Example 3]
The adhesive used in Example 1 was formed on one side of the antistatic layer of the base film having the antistatic layer formed on both sides.
[0029]
Comparative Example 1 FIG. 2A
Only the acrylic pressure-sensitive adhesive prepared in the same manner as in Example 1 was applied, and a surface protective film B1 was prepared using a conductive additive-free one.
[0030]
[Comparative Example 2]
A surface protective film was prepared using a quaternary ammonium salt instead of the conductivity-imparting agent of Example 1.
[0031]
[Comparative Example 3]
In place of the conductivity-imparting agent of Example 1, a surface protective film was prepared using a water-soluble conductive polymer that is hardly soluble in an organic solvent.
[0032]
Comparative Example 4 FIG. 2B
A surface protective film B2 was prepared by using the acrylic pressure-sensitive adhesive of Comparative Example 1 applied on an antistatic layer on a biaxially stretched polyethylene terephthalate film.
[0033]
Comparative Example 5 FIG. 2C
A surface protective film B3 was prepared using the acrylic adhesive of Comparative Example 1 applied on one antistatic layer on a biaxially stretched polyethylene terephthalate film having antistatic layers formed on both surfaces.
[0034]
[Table 1]
*)
Peeling charge voltage (V): A4 size AG (anti-glare) -treated polarizing plate surface is laminated with a protective film and peeled at a peeling speed of 40 m / min at a peeling angle of 180 °. The measurement was performed using a static electricity measuring device of a vibration capacity type of 20 m / sec or more.
[0035]
【The invention's effect】
The present invention relates to a film used for protecting an optical sheet of an article such as a polarizing plate, and when the film is peeled off at the time of ending the role of protection such as scratch prevention, the electronic component incorporated due to peeling charge (static electricity or the like) is destroyed. And does not impair the transparency.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an enlarged part of a surface protective film according to the present invention.
FIG. 2 is an enlarged cross-sectional view showing a part of each surface protective film listed as a comparative example.
[Explanation of symbols]
A: Surface protective film. 2. Antistatic layer. 3. Base material. 4: Adhesive layer. 4a: acrylic pressure-sensitive adhesive + conductivity imparting agent. 5 ... release film. 5a: Silicon release layer of release film. 5b: Base layer of release film.
Claims (7)
前記粘着層は、剥離帯電圧が、剥離表面で700V以下になるように帯電防止を施したことを特徴とする表面保護フィルム。On one side of the substrate in the surface protective film used for the optical sheet of an article such as a polarizing plate, a release film is adhered via an adhesive layer,
A surface protective film, wherein the pressure-sensitive adhesive layer is provided with an antistatic property such that a peeling charge voltage is 700 V or less on a peeling surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003080699A JP2004287199A (en) | 2003-03-24 | 2003-03-24 | Surface protection film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003080699A JP2004287199A (en) | 2003-03-24 | 2003-03-24 | Surface protection film |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2004287199A true JP2004287199A (en) | 2004-10-14 |
Family
ID=33294482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003080699A Pending JP2004287199A (en) | 2003-03-24 | 2003-03-24 | Surface protection film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2004287199A (en) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006143241A (en) * | 2004-11-17 | 2006-06-08 | Toppan Printing Co Ltd | Glass substrate packing method and glass substrate packing body using the same |
WO2007034533A1 (en) * | 2005-09-20 | 2007-03-29 | Soken Chemical & Engineering Co., Ltd. | Pressure-sensitive adhesive composition for polarizing plate and polarizing plate with pressure-sensitive adhesive layer |
CN100426022C (en) * | 2005-08-01 | 2008-10-15 | 东友精细化工有限公司 | Polarizing plate making method |
SG146568A1 (en) * | 2007-03-20 | 2008-10-30 | Long Tai Yeh | Esd-proof polarizer |
US7491758B2 (en) | 2004-06-01 | 2009-02-17 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and surface protecting film |
US7655285B2 (en) | 2005-10-14 | 2010-02-02 | Lg Chem, Ltd. | Acrylic pressure sensitive adhesive compositions |
US7691925B2 (en) | 2004-03-08 | 2010-04-06 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and surface protecting 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 |
US7863360B2 (en) | 2005-06-08 | 2011-01-04 | Lg Chem, Ltd. | Acrylic pressure sensitive adhesive compositions |
US7887914B2 (en) | 2004-09-16 | 2011-02-15 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
US8092907B2 (en) | 2004-09-16 | 2012-01-10 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
US8153251B2 (en) | 2004-04-30 | 2012-04-10 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheets |
JP2012140609A (en) * | 2010-12-15 | 2012-07-26 | Asahi Kasei Chemicals Corp | Protection film for optical member |
US8318859B2 (en) | 2005-03-16 | 2012-11-27 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
US8404344B2 (en) | 2005-05-20 | 2013-03-26 | Nitto Denko Corporation | Pressure sensitive adhesive composition, pressure sensitive adhesive sheet and surface protective film |
JP2013235024A (en) * | 2012-05-02 | 2013-11-21 | Fujimori Kogyo Co Ltd | Surface protective film and optical component laminated with the film |
KR101355020B1 (en) | 2012-02-10 | 2014-01-27 | 에스케이씨하스디스플레이필름(유) | Glass scattering preventing film for thin-film display protection |
US9328264B2 (en) | 2009-02-27 | 2016-05-03 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet |
WO2016145975A1 (en) * | 2015-03-13 | 2016-09-22 | 京东方科技集团股份有限公司 | Polarizer, preparation method therefor, display panel and display device |
CN107083196A (en) * | 2016-02-16 | 2017-08-22 | 藤森工业株式会社 | Surface protection film and the optical component for being fitted with the surface protection film |
JP2018084615A (en) * | 2016-11-21 | 2018-05-31 | 三菱ケミカル株式会社 | Polarizer protection film |
CN109080241A (en) * | 2018-08-28 | 2018-12-25 | 厦门市驰晟胶带有限公司 | A kind of mobile phone factory protective film and preparation method thereof |
JP2018203873A (en) * | 2017-06-02 | 2018-12-27 | リンテック株式会社 | Carrier sheet for flexible device |
CN109111868A (en) * | 2018-07-16 | 2019-01-01 | 苏州大胜电材有限公司 | A kind of ultralow dyestripping voltage polyurethane protective film and preparation method thereof |
-
2003
- 2003-03-24 JP JP2003080699A patent/JP2004287199A/en active Pending
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7691925B2 (en) | 2004-03-08 | 2010-04-06 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets and surface protecting film |
US8153251B2 (en) | 2004-04-30 | 2012-04-10 | Nitto Denko Corporation | Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheets |
US7491758B2 (en) | 2004-06-01 | 2009-02-17 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet 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 |
US7846999B2 (en) | 2004-07-26 | 2010-12-07 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheets, 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 |
US8092907B2 (en) | 2004-09-16 | 2012-01-10 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
US7887914B2 (en) | 2004-09-16 | 2011-02-15 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
JP4736405B2 (en) * | 2004-11-17 | 2011-07-27 | 凸版印刷株式会社 | Glass substrate packaging method and glass substrate packaging using the same |
JP2006143241A (en) * | 2004-11-17 | 2006-06-08 | Toppan Printing Co Ltd | Glass substrate packing method and glass substrate packing body using the same |
US8318859B2 (en) | 2005-03-16 | 2012-11-27 | Nitto Denko Corporation | Pressure-sensitive adhesive compositions, pressure-sensitive adhesive sheets and surface protecting films |
US8404344B2 (en) | 2005-05-20 | 2013-03-26 | Nitto Denko Corporation | Pressure sensitive adhesive composition, pressure sensitive adhesive sheet and surface protective film |
US7863360B2 (en) | 2005-06-08 | 2011-01-04 | Lg Chem, Ltd. | Acrylic pressure sensitive adhesive compositions |
CN100426022C (en) * | 2005-08-01 | 2008-10-15 | 东友精细化工有限公司 | Polarizing plate making method |
US7799853B2 (en) | 2005-09-05 | 2010-09-21 | Nitto Denko Corporation | Adhesive composition, adhesive sheet, and surface protective film |
WO2007034533A1 (en) * | 2005-09-20 | 2007-03-29 | Soken Chemical & Engineering Co., Ltd. | Pressure-sensitive adhesive composition for polarizing plate and polarizing plate with pressure-sensitive adhesive layer |
US7655285B2 (en) | 2005-10-14 | 2010-02-02 | Lg Chem, Ltd. | Acrylic pressure sensitive adhesive compositions |
SG146568A1 (en) * | 2007-03-20 | 2008-10-30 | Long Tai Yeh | Esd-proof polarizer |
US9328264B2 (en) | 2009-02-27 | 2016-05-03 | Nitto Denko Corporation | Pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet |
JP2012140609A (en) * | 2010-12-15 | 2012-07-26 | Asahi Kasei Chemicals Corp | Protection film for optical member |
KR101355020B1 (en) | 2012-02-10 | 2014-01-27 | 에스케이씨하스디스플레이필름(유) | Glass scattering preventing film for thin-film display protection |
JP2013235024A (en) * | 2012-05-02 | 2013-11-21 | Fujimori Kogyo Co Ltd | Surface protective film and optical component laminated with the film |
WO2016145975A1 (en) * | 2015-03-13 | 2016-09-22 | 京东方科技集团股份有限公司 | Polarizer, preparation method therefor, display panel and display device |
US10459275B2 (en) | 2015-03-13 | 2019-10-29 | Boe Technology Group Co., Ltd. | Polarizer, manufacturing method thereof, display panel and display device |
CN107083196A (en) * | 2016-02-16 | 2017-08-22 | 藤森工业株式会社 | Surface protection film and the optical component for being fitted with the surface protection film |
KR20170096568A (en) * | 2016-02-16 | 2017-08-24 | 후지모리 고교 가부시키가이샤 | Surface-protective film and optical component attached with the same |
KR101956548B1 (en) * | 2016-02-16 | 2019-03-11 | 후지모리 고교 가부시키가이샤 | Surface-protective film and optical component attached with the same |
JP2018084615A (en) * | 2016-11-21 | 2018-05-31 | 三菱ケミカル株式会社 | Polarizer protection film |
JP2018203873A (en) * | 2017-06-02 | 2018-12-27 | リンテック株式会社 | Carrier sheet for flexible device |
JP7046504B2 (en) | 2017-06-02 | 2022-04-04 | リンテック株式会社 | Carrier sheet for flexible devices |
CN109111868A (en) * | 2018-07-16 | 2019-01-01 | 苏州大胜电材有限公司 | A kind of ultralow dyestripping voltage polyurethane protective film and preparation method thereof |
CN109080241A (en) * | 2018-08-28 | 2018-12-25 | 厦门市驰晟胶带有限公司 | A kind of mobile phone factory protective film and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2004287199A (en) | Surface protection film | |
US7084516B2 (en) | Surface protection film | |
JP5882266B2 (en) | Surface protective film and optical component on which it is bonded | |
JP5853001B2 (en) | Surface protective film and optical component on which it is bonded | |
JP4170102B2 (en) | Surface protective film and laminate using the same | |
JP2015024630A (en) | Surface protective film and optical component with surface protective film affixed | |
JP2001305346A (en) | Surface protective film | |
JP3936810B2 (en) | Antistatic transparent film and optical member thereof | |
JP2009237489A (en) | Method of manufacturing polarizing plate with surface treated layer | |
JP2007041598A (en) | Manufacturing method of polarizing plate | |
KR101943833B1 (en) | Antistatic surface-protective film | |
JP2003027019A (en) | Self-adhesive film for protecting optical sheet | |
JP6392798B2 (en) | Surface protective film and optical component on which it is bonded | |
KR20190075027A (en) | Surface-protective film and optical component attached with the same | |
JP6414983B2 (en) | Surface protective film and optical component on which it is bonded | |
JP6655682B2 (en) | Release film for antistatic surface protection film | |
JP2009116170A (en) | Pressure-sensitive adhesive tape for photomask protection | |
JP6076517B2 (en) | Release film for antistatic surface protection film | |
JP7351955B2 (en) | Antistatic surface protection film for optical film | |
JP6655681B2 (en) | Release film for antistatic surface protection film | |
JP4299528B2 (en) | Adhesive and adhesive film | |
JP6034944B2 (en) | Surface protection film | |
JP2023101516A (en) | Method for manufacturing antistatic surface protective film and method for manufacturing optical component with surface protective film | |
KR20230140393A (en) | Surface protection film and optical component | |
JP2022033915A (en) | Antistatic surface protective film |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060220 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081202 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20090331 |