JP2000169806A - Pressure-sensitive bonding film for masking - Google Patents
Pressure-sensitive bonding film for maskingInfo
- Publication number
- JP2000169806A JP2000169806A JP35037998A JP35037998A JP2000169806A JP 2000169806 A JP2000169806 A JP 2000169806A JP 35037998 A JP35037998 A JP 35037998A JP 35037998 A JP35037998 A JP 35037998A JP 2000169806 A JP2000169806 A JP 2000169806A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- sensitive adhesive
- film
- weight
- adhesive layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、酸やアルカリ溶液
中においてメッキ、エッチング、脱脂などの表面処理を
行うに際し、非処理部をマスクするためのマスキング用
感圧性接着フィルムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking pressure-sensitive adhesive film for masking a non-processed portion when performing a surface treatment such as plating, etching and degreasing in an acid or alkali solution.
【０００２】[0002]
【従来の技術】酸やアルカリ溶液中での各種の表面処理
を行う際、非処理部を感圧性の接着フィルムでマスクす
る方法が知られている。この感圧性接着フィルムの機能
は、被着体表面と接着剤層との強固な相互作用によりマ
スク部への処理液の浸入を効果的に阻止するものであ
る。ところで、表面処理終了後、この接着フィルムは剥
離される。この際、フィルムを剥離した後の被着体表面
は清浄である必要があり、接着剤層を構成する接着剤は
すべて除去されなければならない。しかしながら、従来
の感圧性接着フィルムでは、剥離時において、接着剤が
被着体に転着してしまう場合があった。2. Description of the Related Art When performing various surface treatments in an acid or alkali solution, a method of masking a non-treated portion with a pressure-sensitive adhesive film is known. The function of the pressure-sensitive adhesive film is to effectively prevent the treatment liquid from entering the mask portion by strong interaction between the surface of the adherend and the adhesive layer. After the surface treatment, the adhesive film is peeled off. At this time, the surface of the adherend after peeling off the film needs to be clean, and all the adhesive constituting the adhesive layer must be removed. However, in the conventional pressure-sensitive adhesive film, the adhesive may transfer to the adherend at the time of peeling.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明の目的
は、酸やアルカリ溶液中で表面処理する場合において、
被処理物のマスク部への処理液の浸入を防止でき、しか
も、表面処理後には、接着剤が被着体に転着しない良好
な剥離性を有するマスキング用感圧性接着フィルムを提
供することにある。Accordingly, an object of the present invention is to provide a method for treating a surface in an acid or alkali solution.
In order to provide a masking pressure-sensitive adhesive film having good releasability in which the treatment liquid can be prevented from entering the mask portion of the object to be processed and the adhesive does not transfer to the adherend after the surface treatment. is there.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記の目
的を達成するために鋭意検討した結果、特定の厚みのプ
ラスチックフィルム上に感圧性接着剤層を２層以上設け
ると、メッキなどの表面処理において、マスキング機能
が十分に発揮されると共に、剥離性を著しく向上できる
ことを見いだし、本発明を完成した。Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, when two or more pressure-sensitive adhesive layers are provided on a plastic film having a specific thickness, plating and the like become difficult. It has been found that in the surface treatment described above, the masking function can be sufficiently exerted and the releasability can be significantly improved, and the present invention has been completed.
【０００５】すなわち本発明は、厚さ６〜２５０μｍの
プラスチックフィルム上に少なくとも２層の感圧性接着
剤層が設けられているマスキング用感圧性接着フィルム
を提供する。That is, the present invention provides a masking pressure-sensitive adhesive film in which at least two pressure-sensitive adhesive layers are provided on a plastic film having a thickness of 6 to 250 μm.
【０００６】この感圧性接着フィルムにおいて、感圧性
接着剤層が重量平均分子量１５万〜２００万のアクリル
系ポリマーの架橋体からなる感圧性接着剤で構成されて
いると共に、前記感圧性接着剤のゲル分率が３０〜１０
０％であってもよい。但し、ゲル分率とは、重量Ｗ
0（乾燥重量）の感圧性接着剤を１Ｎ水酸化ナトリウム
水溶液中に常温（例えば２０℃）で３日間浸漬した後、
取り出して乾燥したときの重量をＷ1としたとき、（Ｗ1
／Ｗ0）×１００として算出される値を意味する。In this pressure-sensitive adhesive film, the pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive composed of a crosslinked acrylic polymer having a weight average molecular weight of 150,000 to 2,000,000, and Gel fraction 30 to 10
It may be 0%. However, the gel fraction is the weight W
After immersing a 0 (dry weight) pressure-sensitive adhesive in a 1N aqueous solution of sodium hydroxide at room temperature (for example, 20 ° C.) for 3 days,
When the weight when the dried extraction was W 1, (W 1
/ W 0 ) × 100.
【０００７】また、プラスチックフィルム上に、膨潤度
が１〜３倍である感圧性接着剤で構成された感圧性接着
剤層Ａと、膨潤度が４〜２０倍である感圧性接着剤で構
成された感圧性接着剤層Ｂとが、この順に設けられてい
てもよい。但し、膨潤度とは、重量Ｗ0（乾燥重量）の
感圧性接着剤を１Ｎ水酸化ナトリウム水溶液中に常温
（例えば２０℃）で３日間浸漬した後、取り出したとき
の湿重量をＷ2としたとき、Ｗ2／Ｗ0として算出される
値を意味する。感圧性接着剤層Ａの厚みは１〜１００μ
ｍ程度、感圧性接着剤層Ｂの厚みは１〜１０μｍ程度で
ある。A pressure-sensitive adhesive layer A composed of a pressure-sensitive adhesive having a swelling degree of 1-3 times on a plastic film and a pressure-sensitive adhesive having a swelling degree of 4-20 times. The pressure-sensitive adhesive layer B provided may be provided in this order. However, the swelling degree means that the wet weight when taken out after immersing a pressure-sensitive adhesive having a weight W 0 (dry weight) in a 1N aqueous sodium hydroxide solution at room temperature (for example, 20 ° C.) for 3 days, and taking it out is W 2 . Means the value calculated as W 2 / W 0 . The thickness of the pressure-sensitive adhesive layer A is 1 to 100 μm.
m, and the thickness of the pressure-sensitive adhesive layer B is about 1 to 10 μm.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。なお、図１は本発明のマスキング用
感圧性接着フィルムの一例の断面を模式的に示した図で
ある。Embodiments of the present invention will be described below in detail. FIG. 1 is a diagram schematically showing a cross section of an example of the pressure-sensitive adhesive film for masking of the present invention.
【０００９】前記プラスチックフィルムとしては、支持
体として機能し得る種々のプラスチックフィルム、例え
ば、ポリエチレンフィルム、ポリプロピレンフィルムな
どのオレフィン系フィルム；ポリエチレンテレフタレー
トなどのポリエステルフィルムなどが挙げられる。プラ
スチックフィルムは２種以上のポリマーの混合物で構成
されていてもよく、また２層以上の積層体であってもよ
い。プラスチックフィルムは、表面処理に用いる処理液
の種類に応じ、該処理液により分解、劣化しにくいもの
を適宜選択して使用できる。Examples of the plastic film include various plastic films that can function as a support, for example, an olefin-based film such as a polyethylene film and a polypropylene film; and a polyester film such as polyethylene terephthalate. The plastic film may be composed of a mixture of two or more polymers, or may be a laminate of two or more layers. The plastic film can be appropriately selected from those which are hardly decomposed and deteriorated by the treatment liquid according to the type of the treatment liquid used for the surface treatment.
【００１０】プラスチックフィルムの厚みは６〜２５０
μｍであり、好ましくは１２〜１００μｍ程度である。
プラスチックフィルムの厚みが６μｍ未満では、支持体
としての機能を充分果たすことができず、２５０μｍを
超えると接着フィルムとしたときの取扱性などが低下す
る。The thickness of the plastic film is 6 to 250.
μm, and preferably about 12 to 100 μm.
If the thickness of the plastic film is less than 6 μm, it cannot sufficiently function as a support, and if it exceeds 250 μm, the handleability when used as an adhesive film is reduced.
【００１１】感圧性接着剤層は少なくとも２層設けられ
ていればよく、３層以上設けられていてもよい。感圧性
接着剤層の総厚みは、例えば１〜２００μｍ程度であ
る。It is sufficient that at least two pressure-sensitive adhesive layers are provided, and three or more pressure-sensitive adhesive layers may be provided. The total thickness of the pressure-sensitive adhesive layer is, for example, about 1 to 200 μm.
【００１２】感圧性接着剤層を構成する感圧性接着剤と
しては、アクリル系粘着剤、ゴム系粘着剤、シリコーン
系粘着剤などの何れであってもよいが、好ましくはアク
リル系ポリマー、特に（メタ）アクリル酸エステル系ポ
リマーを主体とするアクリル系粘着剤である。The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer may be any of an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, etc. An acrylic pressure-sensitive adhesive mainly composed of a (meth) acrylic acid ester-based polymer.
【００１３】前記アクリル系ポリマーは、例えば、主成
分である（メタ）アクリル酸アルキルエステルと官能基
含有モノマーとを含むモノマー混合物を、重合開始剤を
用いて常法よりラジカル重合させることにより得られ
る。The acrylic polymer can be obtained, for example, by subjecting a monomer mixture containing an alkyl (meth) acrylate as a main component and a monomer having a functional group to radical polymerization by a conventional method using a polymerization initiator. .
【００１４】（メタ）アクリル酸アルキルエステルとし
ては、例えば、アクリル酸メチル、アクリル酸ブチル、
アクリル酸２−エチルヘキシル、メタクリル酸ブチル、
メタクリル酸２−エチルヘキシルなどのアルキル基の炭
素数が１〜１２個程度のアクリル酸アルキルエステル又
はメタクリル酸アルキルエステルなどが挙げられる。こ
れらの（メタ）アクリル酸アルキルエステルは単独で又
は２種以上混合して用いることができる。なお、この
（メタ）アクリル酸アルキルエステルの一部を、必要に
応じて、スチレンや酢酸ビニルなど他の共重合性モノマ
ーに置き換えてもよい。Examples of the alkyl (meth) acrylate include methyl acrylate, butyl acrylate,
2-ethylhexyl acrylate, butyl methacrylate,
Examples thereof include alkyl acrylates and alkyl methacrylates having about 1 to 12 carbon atoms in an alkyl group such as 2-ethylhexyl methacrylate. These alkyl (meth) acrylates can be used alone or in combination of two or more. A part of the alkyl (meth) acrylate may be replaced with another copolymerizable monomer such as styrene or vinyl acetate, if necessary.
【００１５】前記官能基含有モノマーは、被着体表面に
対する活性度や濡れ性を改良する成分として寄与するほ
か、架橋点としても作用して凝集力の向上に好結果を与
えるものである。このようなモノマーとしては、アクリ
ル酸、メタクリル酸、無水マレイン酸などのカルボキシ
ル基又は酸無水物基含有モノマー；アクリル酸２−ヒド
ロキシエチル、アクリル酸２−ヒドロキシルプロピル、
２−ヒドロキシエチルビニルエーテルなどの水酸基含有
モノマー；アクリル酸Ｎ，Ｎ−ジメチルアミノエチル、
メタクリル酸Ｎ，Ｎ−ジメチルアミノエチルなどのアミ
ノ基含有モノマー；アクリル酸アミド、メタクリル酸ア
ミドなどのアミド基含有モノマーなどが挙げられ、その
他エポキシ基、ホスフィン基、スルホン基などを有する
ポリマーも用いることができる。The functional group-containing monomer not only contributes as a component for improving the activity and wettability to the surface of the adherend, but also acts as a crosslinking point to give good results in improving cohesion. Examples of such a monomer include acrylic acid, methacrylic acid, a monomer containing a carboxyl group or an acid anhydride group such as maleic anhydride; 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate,
Hydroxyl-containing monomers such as 2-hydroxyethyl vinyl ether; N, N-dimethylaminoethyl acrylate;
Amino group-containing monomers such as N, N-dimethylaminoethyl methacrylate; amide group-containing monomers such as acrylamide and methacrylamide; and polymers having epoxy groups, phosphine groups, and sulfone groups. Can be.
【００１６】このような官能基含有モノマーの使用量
は、（メタ）アクリル酸アルキルエステル１００重量部
に対して、通常０．５〜２０重量部程度である。官能基
含有モノマーの使用量が過小では被着体に対する活性や
濡れ性が不十分となったり、架橋が不十分となって凝集
力が低下しやすい。また、過多となると、接着力の低下
を生じたり、アクリル系ポリマーを生成する際の重合反
応が不安定となる。The amount of such a functional group-containing monomer is usually about 0.5 to 20 parts by weight based on 100 parts by weight of the alkyl (meth) acrylate. If the amount of the functional group-containing monomer is too small, the activity and wettability with respect to the adherend become insufficient, or the crosslinking becomes insufficient, and the cohesive force tends to decrease. In addition, when the amount is excessive, the adhesive strength is reduced, and the polymerization reaction when producing an acrylic polymer becomes unstable.
【００１７】前記アクリル系ポリマーの重量平均分子量
は、例えば１５万〜２００万の範囲であり、特に好まし
くは２０万〜１５０万の範囲である。アクリル系ポリマ
ーの分子量が低すぎると接着剤の凝集力が低下するとと
もに、酸やアルカリなどに対する耐薬品性が低下して、
接着剤の分解溶出が大きくなりやすい。また、アクリル
系ポリマーの分子量が高すぎると初期の接着特性が悪く
なり、作業性が低下しやすい。The weight average molecular weight of the acrylic polymer is, for example, in the range of 150,000 to 2,000,000, and particularly preferably in the range of 200,000 to 1.5,000,000. If the molecular weight of the acrylic polymer is too low, the cohesive strength of the adhesive decreases, and the chemical resistance to acids and alkalis decreases,
The decomposition and elution of the adhesive tend to increase. On the other hand, if the molecular weight of the acrylic polymer is too high, the initial adhesive properties are deteriorated, and the workability tends to be reduced.
【００１８】本発明において用いられるマスキング用感
圧性接着剤は、上記アクリル系ポリマーなどのポリマー
成分を必須成分として含有し、これに必要に応じて、可
塑剤、界面活性剤、撥水剤、着色剤、充填剤、粘着付与
樹脂などの各種の添加剤を適量加えることができる。The pressure-sensitive adhesive for masking used in the present invention contains a polymer component such as the acrylic polymer as an essential component, and if necessary, a plasticizer, a surfactant, a water repellent, a coloring agent, and the like. Various additives such as agents, fillers and tackifying resins can be added in appropriate amounts.
【００１９】このような構成成分を含むマスキング用感
圧性接着剤は、マスク材として使用するにあたり、適宜
の方法で架橋処理することにより、アクリル系ポリマー
などのポリマー成分の架橋度や水に対する膨潤性を適当
に調整できる。そして、２以上の感圧性接着剤層を構成
する各感圧性接着剤の架橋度や膨潤性を、各層の位置関
係を考慮しつつ適正範囲に設定することにより、感圧性
接着フィルムのマスキング性と剥離性とを両立させるこ
とができる。When the pressure-sensitive adhesive for masking containing such a component is used as a mask material, the pressure-sensitive adhesive is subjected to a crosslinking treatment by an appropriate method, so that the degree of crosslinking of a polymer component such as an acrylic polymer and the swelling property to water are improved. Can be adjusted appropriately. By setting the degree of cross-linking and swelling of each pressure-sensitive adhesive constituting the two or more pressure-sensitive adhesive layers in an appropriate range in consideration of the positional relationship of each layer, the masking property of the pressure-sensitive adhesive film is improved. Both releasability can be achieved.
【００２０】例えば、支持体としてのプラスチックフィ
ルムに隣接する感圧性接着剤層を構成する接着剤とし
て、架橋度が高く膨潤性の小さいポリマーを選択する
と、この接着剤層が支持体側に強固に密着するため、接
着フィルムを被着体から剥離する際、接着剤層が被着体
側に転着するのを抑制できる。また、被着体に接触する
最外層の感圧性接着剤層を構成する接着剤として、架橋
度が比較的低く膨潤性の大きいポリマーを用いると、被
着体表面との相互作用により、表面処理に用いる処理液
がマスク部に浸入するのを効果的に防止できる。For example, when a polymer having a high degree of cross-linking and a small swelling property is selected as the adhesive constituting the pressure-sensitive adhesive layer adjacent to the plastic film as the support, the adhesive layer is firmly adhered to the support. Therefore, when the adhesive film is peeled from the adherend, transfer of the adhesive layer to the adherend can be suppressed. In addition, when a polymer having a relatively low degree of cross-linking and a large swelling property is used as the adhesive constituting the outermost pressure-sensitive adhesive layer in contact with the adherend, the surface treatment occurs due to interaction with the adherend surface. It is possible to effectively prevent the processing liquid used for the infiltration into the mask portion.
【００２１】なお、前記ポリマー成分の架橋度や膨潤性
は、ポリマーを構成するコモノマー成分の種類及び割
合、架橋処理法（例えば、架橋剤の種類や使用量）など
を適宜選択することにより調整できる。The degree of cross-linking and swelling of the polymer component can be adjusted by appropriately selecting the type and proportion of the comonomer component constituting the polymer, the cross-linking treatment method (for example, the type and amount of cross-linking agent) and the like. .
【００２２】架橋処理の方法は、任意であり、特に限定
されない。例えば、感圧性接着剤に、予め、前記官能基
含有モノマーの種類に応じて、適宜の架橋剤、例えば、
多官能性イソシアネート、メチロール化合物、酸触媒な
どを添加しておき、接着フィルムを作成するに際し、こ
れを支持体としてのプラスチックフィルム上に塗設した
後、あるいは一旦セパレータ上に塗設しこれを上記支持
体上に転写した後、常温又は加温下に放置して架橋処理
すればよい。The method of the crosslinking treatment is arbitrary and is not particularly limited. For example, in the pressure-sensitive adhesive, in advance, depending on the type of the functional group-containing monomer, an appropriate crosslinking agent, for example,
A polyfunctional isocyanate, a methylol compound, an acid catalyst, etc. are added, and when forming an adhesive film, after coating this on a plastic film as a support, or once coating on a separator, After the transfer onto the support, the substrate may be left standing at room temperature or under heating to perform a crosslinking treatment.
【００２３】本発明のマスキング用感圧性接着フィルム
において、感圧性接着剤層を構成する感圧性接着剤の前
記ゲル分率は、例えば３０〜１００％程度の範囲が好ま
しく、特に６０〜１００％程度の範囲が好ましい。この
ゲル分率は前記ポリマー成分の架橋度と相関している。
すなわち、ポリマー成分の架橋度が大きいほど前記ゲル
分率が高くなる。In the pressure-sensitive adhesive film for masking of the present invention, the gel fraction of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is preferably, for example, in the range of about 30 to 100%, particularly preferably about 60 to 100%. Is preferable. This gel fraction correlates with the degree of crosslinking of the polymer component.
That is, the higher the degree of crosslinking of the polymer component, the higher the gel fraction.
【００２４】また、感圧性接着剤層を構成する感圧性接
着剤の前記膨潤度は、好ましくは１〜２０倍程度であ
る。上記ゲル分率及び膨潤度が上記の範囲外となると、
被着体に対する密着性の向上効果が乏しくなって、シー
ル性が低下したり、接着剤の溶解、溶出が大きくなっ
て、処理液が汚染されるおそれが生じる。The swelling degree of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is preferably about 1 to 20 times. When the gel fraction and the degree of swelling are out of the above ranges,
The effect of improving the adhesion to the adherend is poor, and the sealing property is reduced, and the dissolution and elution of the adhesive are increased, and the processing liquid may be contaminated.
【００２５】本発明の好ましい態様では、図１に示され
るように、支持体としてのプラスチックフィルム上に、
前記膨潤度が１〜３倍である感圧性接着剤で構成された
感圧性接着剤層Ａと、前記膨潤度が４〜２０倍（好まし
くは４．５〜１５倍）である感圧性接着剤で構成された
感圧接着剤層Ｂとをこの順序で設ける。感圧性接着剤層
Ａの厚みは、例えば１〜１００μｍ、好ましくは１．５
〜６０μｍ程度であり、感圧性接着剤層Ｂの厚みは、例
えば１〜１０μｍ、好ましくは１．５〜７μｍ程度であ
る。このような接着フィルムを酸やアルカリ溶液中での
各種表面処理における非処理部のマスキングフィルムと
して用いると、感圧性接着剤層Ｂによりマスク部への処
理液の浸入を極めて効果的に防止できるとともに、接着
フィルムを剥離する際には、感圧性接着剤層Ａにより、
接着剤の被着体への転着を顕著に抑制できる。本発明の
マスキング用感圧性接着フィルムは、適当な幅を有する
テープとして使用できる。In a preferred embodiment of the present invention, as shown in FIG. 1, on a plastic film as a support,
A pressure-sensitive adhesive layer A composed of a pressure-sensitive adhesive having a swelling degree of 1 to 3 times, and a pressure-sensitive adhesive having a swelling degree of 4 to 20 times (preferably 4.5 to 15 times) Are provided in this order. The thickness of the pressure-sensitive adhesive layer A is, for example, 1 to 100 μm, preferably 1.5 to 100 μm.
And the thickness of the pressure-sensitive adhesive layer B is, for example, about 1 to 10 μm, and preferably about 1.5 to 7 μm. When such an adhesive film is used as a masking film for a non-processed portion in various surface treatments in an acid or alkali solution, the pressure-sensitive adhesive layer B can extremely effectively prevent the treatment liquid from entering the mask portion. When peeling off the adhesive film, by the pressure-sensitive adhesive layer A,
Transfer of the adhesive to the adherend can be significantly suppressed. The pressure-sensitive adhesive film for masking of the present invention can be used as a tape having an appropriate width.
【００２６】[0026]
【発明の効果】本発明によれば、支持体となるプラスチ
ックフィルム上に少なくとも２層の感圧性接着剤層が設
けられているので、例えば、各接着剤層を構成するポリ
マーの架橋度や膨潤性を調整することにより、酸やアル
カリ溶液中で表面処理するに際して、被処理物のマスク
部への処理液の浸入を効果的に防止できるとともに、処
理後には、接着剤を被処理物に転着させることなく円滑
に剥離できる。According to the present invention, since at least two pressure-sensitive adhesive layers are provided on a plastic film as a support, for example, the degree of cross-linking and swelling of the polymer constituting each adhesive layer can be improved. By adjusting the property, it is possible to effectively prevent the intrusion of the processing liquid into the mask portion of the processing object when performing the surface processing in an acid or alkali solution, and to transfer the adhesive to the processing object after the processing. It can be peeled off smoothly without wearing.
【００２７】[0027]
【実施例】以下、本発明を実施例に基づいてより詳細に
説明するが、本発明はこれらの実施例により何ら限定さ
れるものではない。なお、以下の例において、「部」と
あるのは「重量部」を意味する。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In the following examples, “parts” means “parts by weight”.
【００２８】実施例１ アクリル酸ブチル１００部、アクリル酸３部の単量体混
合物を重合することにより、重量平均分子量１００万の
アクリル系ポリマーを得た。このポリマーに架橋剤とし
てイソシアネート系架橋剤４部を混合して、感圧性接着
剤の溶液を得た。この接着剤溶液を、厚さ１００μｍの
ポリエチレンテレフタレートフィルムの片面に、乾燥後
の厚さが２μｍとなるように塗布し、１３０℃で３分間
乾燥して、感圧性接着剤層A1を形成した。この感圧性接
着剤層A1を構成する接着剤（架橋したアクリル系ポリマ
ー）のゲル分率は９９％、膨潤度は１．５倍であった。
一方、アクリル酸エチル５０部、アクリル酸ブチル５０
部、アクリル酸６部の単量体混合物を重合することによ
り、重量平均分子量８０万のアクリル系ポリマーを得
た。このポリマーに架橋剤としてイソシアネート系架橋
剤２部を混合して、感圧性接着剤の溶液を得た。この接
着剤溶液をセパレータに乾燥後の厚さが６μｍとなるよ
うに塗布し、１３０℃で３分間乾燥して感圧性接着剤層
B1を形成した。この感圧性接着剤層B1を上記の感圧性接
着剤層A1上に転写し、２層の感圧性接着剤層を有する接
着フィルムを得た。なお、感圧性接着剤層B1を構成する
接着剤（架橋したアクリル系ポリマー）のゲル分率は７
０％、膨潤度は５倍であった。Example 1 An acrylic polymer having a weight average molecular weight of 1,000,000 was obtained by polymerizing a monomer mixture of 100 parts of butyl acrylate and 3 parts of acrylic acid. This polymer was mixed with 4 parts of an isocyanate-based crosslinking agent as a crosslinking agent to obtain a solution of a pressure-sensitive adhesive. This adhesive solution was applied to one side of a 100 μm-thick polyethylene terephthalate film so that the thickness after drying became 2 μm, and dried at 130 ° C. for 3 minutes to form a pressure-sensitive adhesive layer A1. The gel fraction of the adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer A1 was 99%, and the degree of swelling was 1.5 times.
On the other hand, 50 parts of ethyl acrylate and 50 parts of butyl acrylate
And a monomer mixture of 6 parts by weight of acrylic acid, thereby obtaining an acrylic polymer having a weight average molecular weight of 800,000. This polymer was mixed with 2 parts of an isocyanate-based crosslinking agent as a crosslinking agent to obtain a solution of a pressure-sensitive adhesive. This adhesive solution is applied to a separator so that the thickness after drying becomes 6 μm, and dried at 130 ° C. for 3 minutes to form a pressure-sensitive adhesive layer.
B1 was formed. The pressure-sensitive adhesive layer B1 was transferred onto the pressure-sensitive adhesive layer A1 to obtain an adhesive film having two pressure-sensitive adhesive layers. The gel fraction of the adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer B1 is 7
0% and the degree of swelling was 5 times.
【００２９】実施例２ アクリル酸ブチル１００部、アクリロニトリル３５部、
アクリル酸３部の単量体混合物を重合することにより、
重量平均分子量１００万のアクリル系ポリマーを得た。
このポリマーに架橋剤としてイソシアネート系架橋剤４
部を混合して、感圧性接着剤の溶液を得た。この接着剤
溶液を、厚さ２４μｍのポリエチレンテレフタレートフ
ィルムの片面に、乾燥後の厚さが１０μｍとなるように
塗布し、１３０℃で３分間乾燥して、感圧性接着剤層A2
を形成した。この感圧性接着剤層A2を構成する接着剤
（架橋したアクリル系ポリマー）のゲル分率は９９％、
膨潤度は１倍であった。一方、アクリル酸メチル５０
部、アクリル酸ブチル５０部、アクリル酸６部の単量体
混合物を重合することにより、重量平均分子量８０万の
アクリル系ポリマーを得た。このポリマーに架橋剤とし
てイソシアネート系架橋剤２部を混合して感圧性接着剤
の溶液を得た。この接着剤溶液をセパレータに乾燥後の
厚さが２μｍとなるように塗布し、１３０℃で３分間乾
燥して感圧性接着剤層B2を形成した。この感圧性接着剤
層B2を上記の感圧性接着剤層A2上に転写し、２層の感圧
性接着剤層を有する接着フィルムを得た。なお、感圧性
接着剤層B2を構成する接着剤（架橋したアクリル系ポリ
マー）のゲル分率は７０％、膨潤度は１０倍であった。Example 2 100 parts of butyl acrylate, 35 parts of acrylonitrile,
By polymerizing a monomer mixture of 3 parts of acrylic acid,
An acrylic polymer having a weight average molecular weight of 1,000,000 was obtained.
Isocyanate-based crosslinking agent 4 as a crosslinking agent for this polymer
The parts were mixed to obtain a solution of the pressure-sensitive adhesive. This adhesive solution was applied to one side of a 24 μm-thick polyethylene terephthalate film so that the thickness after drying became 10 μm, and dried at 130 ° C. for 3 minutes to obtain a pressure-sensitive adhesive layer A2.
Was formed. The gel fraction of the adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer A2 is 99%,
The degree of swelling was one. On the other hand, methyl acrylate 50
Parts, butyl acrylate and 50 parts of a monomer mixture were polymerized to obtain an acrylic polymer having a weight average molecular weight of 800,000. This polymer was mixed with 2 parts of an isocyanate-based crosslinking agent as a crosslinking agent to obtain a solution of a pressure-sensitive adhesive. This adhesive solution was applied to a separator so that the thickness after drying was 2 μm, and dried at 130 ° C. for 3 minutes to form a pressure-sensitive adhesive layer B2. The pressure-sensitive adhesive layer B2 was transferred onto the pressure-sensitive adhesive layer A2 to obtain an adhesive film having two pressure-sensitive adhesive layers. The adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer B2 had a gel fraction of 70% and a swelling degree of 10 times.
【００３０】比較例１ アクリル酸ブチル１００部、アクリル酸３部の単量体混
合物を重合することにより、重量平均分子量１００万の
アクリル系ポリマーを得た。このポリマーに架橋剤とし
てイソシアネート系架橋剤４部を混合して、感圧性接着
剤の溶液を得た。この接着剤溶液を、厚さ１００μｍの
ポリエチレンテレフタレートフィルムの片面に、乾燥後
の厚さが２μｍとなるように塗布し、１３０℃で３分間
乾燥して、感圧性接着剤層を形成し、接着フィルムを得
た。このフィルムにおいて、感圧性接着剤層を構成する
接着剤（架橋したアクリル系ポリマー）のゲル分率は９
９％、膨潤度は１．５倍であった。Comparative Example 1 An acrylic polymer having a weight average molecular weight of 1,000,000 was obtained by polymerizing a monomer mixture of 100 parts of butyl acrylate and 3 parts of acrylic acid. This polymer was mixed with 4 parts of an isocyanate-based crosslinking agent as a crosslinking agent to obtain a solution of a pressure-sensitive adhesive. This adhesive solution is applied to one side of a 100 μm-thick polyethylene terephthalate film so that the thickness after drying becomes 2 μm, and dried at 130 ° C. for 3 minutes to form a pressure-sensitive adhesive layer. A film was obtained. In this film, the gel fraction of the adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer is 9
The swelling degree was 9 times and the swelling degree was 1.5 times.
【００３１】比較例２ アクリル酸メチル５０部、アクリル酸ブチル５０部、ア
クリル酸６部の単量体混合物を重合することにより、重
量平均分子量８０万のアクリル系ポリマーを得た。この
ポリマーに架橋剤としてイソシアネート系架橋２部を混
合して、感圧性接着剤の溶液を得た。この接着剤溶液
を、厚さ２４μｍのポリエチレンテレフタレートフィル
ムの片面に、乾燥後の厚さが１０μｍとなるように塗布
し、１３０℃で３分間乾燥して、感圧性接着剤層を形成
し、接着フィルムを得た。このフィルムにおいて、感圧
性接着剤層を構成する接着剤（架橋したアクリル系ポリ
マー）のゲル分率は７０％、膨潤度は１０倍であった。Comparative Example 2 An acrylic polymer having a weight average molecular weight of 800,000 was obtained by polymerizing a monomer mixture of 50 parts of methyl acrylate, 50 parts of butyl acrylate, and 6 parts of acrylic acid. This polymer was mixed with 2 parts of an isocyanate-based crosslinker as a crosslinker to obtain a solution of a pressure-sensitive adhesive. This adhesive solution is applied to one side of a 24 μm-thick polyethylene terephthalate film so that the thickness after drying becomes 10 μm, and dried at 130 ° C. for 3 minutes to form a pressure-sensitive adhesive layer, and A film was obtained. In this film, the adhesive (crosslinked acrylic polymer) constituting the pressure-sensitive adhesive layer had a gel fraction of 70% and a swelling degree of 10 times.
【００３２】評価試験 防錆剤としてベンゾトリアゾールが塗布されている銅板
の表面の一部に、実施例及び比較例で得られた各接着フ
ィルムをハンドローラで仮圧着し、次いで５ｋｇｆ／ｃ
ｍ2×１ｍ／分の条件でラミネータロールにより圧着す
ることで、表面の一部を接着フィルムでマスクした試料
を作成した。この試料を用いて以下の処理試験を行っ
た。その結果を表１に示す。Evaluation Test Each of the adhesive films obtained in Examples and Comparative Examples was temporarily pressed with a hand roller on a part of the surface of a copper plate coated with benzotriazole as a rust preventive agent, and then 5 kgf / c.
A sample having a part of the surface masked with an adhesive film was prepared by pressure bonding with a laminator roll under the condition of m 2 × 1 m / min. The following processing test was performed using this sample. Table 1 shows the results.
【００３３】（アルカリ電解脱脂処理）液組成を、水酸
化ナトリウム３０ｇ／リットル、炭酸ナトリウム１５ｇ
／リットル、リン酸三ナトリウム２０ｇ／リットルと
し、浴温を６０℃に調整したビーカ中に上記試料を浸漬
し、陰極側における電流密度８Ａ／ｄｍ2の条件で３分
間、アルカリ電解脱脂処理を行った。処理後の試料につ
いて、接着フィルムによるマスク部への処理液の浸入防
止効果を調べ、処理液の浸入の程度がマスク部の周縁部
から０．５ｍｍ未満である場合には「○」、０．５ｍｍ
以上である場合には「×」と評価した。(Alkaline electrolytic degreasing treatment) The composition of the solution was 30 g / liter of sodium hydroxide and 15 g of sodium carbonate.
/ Liter, 20 g / liter of trisodium phosphate, the above sample was immersed in a beaker whose bath temperature was adjusted to 60 ° C., and an alkaline electrolytic degreasing treatment was performed for 3 minutes at a current density of 8 A / dm 2 on the cathode side. Was. For the sample after the treatment, the effect of preventing the treatment liquid from penetrating into the mask portion by the adhesive film was examined. When the degree of penetration of the treatment solution was less than 0.5 mm from the peripheral portion of the mask portion, “O”, 0. 5mm
When it was above, it was evaluated as "x".
【００３４】（剥離試験）銅板上に貼着した各接着フィ
ルムを１０ｍ／分の速度で剥離し、銅板への接着剤の転
着状況を調べた。銅板への接着剤の転着がある場合には
「×」、ない場合には「○」と評価した。(Peeling Test) Each adhesive film stuck on the copper plate was peeled at a speed of 10 m / min, and the state of transfer of the adhesive to the copper plate was examined. When there was transfer of the adhesive to the copper plate, the evaluation was "x", and when there was no transfer, the evaluation was "o".
【００３５】[0035]
【表１】 表１より明らかなように、実施例の接着フィルムによれ
ば、マスク部への処理液の浸入を防止でき、しかも剥離
時における被着体への接着剤の転着をも防止できる。[Table 1] As is clear from Table 1, according to the adhesive film of the example, it is possible to prevent the treatment liquid from penetrating into the mask portion, and also prevent transfer of the adhesive to the adherend during peeling.
【図１】本発明のマスキング用感圧性接着フィルムの一
例の断面を模式的に示した図である。FIG. 1 is a diagram schematically showing a cross section of an example of the pressure-sensitive adhesive film for masking of the present invention.
１ マスキング用感圧性接着フィルム ２ プラスチックフィルム（支持体） ３ 感圧性接着剤層Ａ ４ 感圧性接着剤層Ｂ Reference Signs List 1 pressure-sensitive adhesive film for masking 2 plastic film (support) 3 pressure-sensitive adhesive layer A 4 pressure-sensitive adhesive layer B
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4F100 AK01A AK25B AK25C AK25K AK42 AR00B AR00C BA03 BA10A BA10C GB90 JA07B JA07C JA20B JA20C JB10 JB10B JB10C JK07 JL00 JL13B JL13C YY00A YY00B YY00C 4J004 AA05 AA10 AA11 AB01 CA04 CA06 CC02 CC03 CE01 DB02 FA04 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4F100 AK01A AK25B AK25C AK25K AK42 AR00B AR00C BA03 BA10A BA10C GB90 JA07B JA07C JA20B JA20C JB10 JB10B JB10C JK07 JL00 JL13B JL13C YY00AY04A01 Y04A04 CC
Claims (4)
ルム上に少なくとも２層の感圧性接着剤層が設けられて
いるマスキング用感圧性接着フィルム。1. A masking pressure-sensitive adhesive film comprising a plastic film having a thickness of 6 to 250 μm and at least two pressure-sensitive adhesive layers.
〜２００万のアクリル系ポリマーの架橋体からなる感圧
性接着剤で構成されていると共に、前記感圧性接着剤の
ゲル分率が３０〜１００％である請求項１記載のマスキ
ング用感圧性接着フィルム（但し、前記ゲル分率とは、
重量Ｗ0の感圧性接着剤を１Ｎ水酸化ナトリウム水溶液
中に常温で３日間浸漬した後、取り出して乾燥したとき
の重量をＷ1としたとき、（Ｗ1／Ｗ0）×１００として
算出される値を意味する）。2. The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive comprising a crosslinked acrylic polymer having a weight average molecular weight of 150,000 to 2,000,000, and the gel fraction of the pressure-sensitive adhesive is 30. The pressure-sensitive adhesive film for masking according to claim 1, wherein the gel fraction is
After immersing the pressure-sensitive adhesive having a weight of W 0 in a 1N aqueous solution of sodium hydroxide at room temperature for 3 days, taking out and drying the weight W 1 , the weight is calculated as (W 1 / W 0 ) × 100. Value).
〜３倍である感圧性接着剤で構成された感圧性接着剤層
Ａと、膨潤度が４〜２０倍である感圧性接着剤で構成さ
れた感圧性接着剤層Ｂとが、この順に設けられている請
求項１記載のマスキング用感圧性接着フィルム（但し、
前記膨潤度とは、重量Ｗ0の感圧性接着剤を１Ｎ水酸化
ナトリウム水溶液中に常温で３日間浸漬した後、取り出
したときの湿重量をＷ2としたとき、Ｗ2／Ｗ0として算
出される値を意味する）。3. A swelling degree of 1 on a plastic film.
A pressure-sensitive adhesive layer A composed of a pressure-sensitive adhesive of up to 3 times and a pressure-sensitive adhesive layer B composed of a pressure-sensitive adhesive having a swelling degree of 4 to 20 times are provided in this order. The pressure-sensitive adhesive film for masking according to claim 1, wherein
The swelling degree is calculated as W 2 / W 0 , where a pressure-sensitive adhesive having a weight of W 0 is immersed in a 1N aqueous sodium hydroxide solution at room temperature for 3 days, and the wet weight when taken out is defined as W 2. Value).
ｍ、感圧性接着剤層Ｂの厚みが１〜１０μｍである請求
項３記載のマスキング用感圧性接着フィルム。4. The pressure-sensitive adhesive layer A has a thickness of 1 to 100 μm.
The pressure-sensitive adhesive film for masking according to claim 3, wherein m and the thickness of the pressure-sensitive adhesive layer B are 1 to 10 µm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35037998A JP4179685B2 (en) | 1998-12-09 | 1998-12-09 | Pressure sensitive adhesive film for masking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35037998A JP4179685B2 (en) | 1998-12-09 | 1998-12-09 | Pressure sensitive adhesive film for masking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000169806A true JP2000169806A (en) | 2000-06-20 |
| JP4179685B2 JP4179685B2 (en) | 2008-11-12 |
Family
ID=18410094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35037998A Expired - Fee Related JP4179685B2 (en) | 1998-12-09 | 1998-12-09 | Pressure sensitive adhesive film for masking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4179685B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220911A (en) * | 2006-02-16 | 2007-08-30 | Nitto Denko Corp | Adhesive sheet for manufacturing semiconductor device, and manufacturing method of semiconductor device using same |
| WO2012018055A1 (en) * | 2010-08-05 | 2012-02-09 | 新タック化成株式会社 | Double-faced pressure-sensitive adhesive sheet, double-faced pressure-sensitive adhesive sheet with release sheet, process for producing same, and transparent laminate |
| JP2012052084A (en) * | 2010-08-05 | 2012-03-15 | New Tac Kasei Co Ltd | Double-sided adhesive sheet, double-sided adhesive sheet with release sheet, method for manufacturing the same, and transparent laminate |
| JP4918166B1 (en) * | 2011-02-14 | 2012-04-18 | 新タック化成株式会社 | Double-sided pressure-sensitive adhesive sheet, double-sided pressure-sensitive adhesive sheet with release sheet, method for producing the same, and transparent laminate |
| JP2014136746A (en) * | 2013-01-17 | 2014-07-28 | Nitto Denko Corp | Protective sheet for chemical solution treatment |
-
1998
- 1998-12-09 JP JP35037998A patent/JP4179685B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220911A (en) * | 2006-02-16 | 2007-08-30 | Nitto Denko Corp | Adhesive sheet for manufacturing semiconductor device, and manufacturing method of semiconductor device using same |
| WO2012018055A1 (en) * | 2010-08-05 | 2012-02-09 | 新タック化成株式会社 | Double-faced pressure-sensitive adhesive sheet, double-faced pressure-sensitive adhesive sheet with release sheet, process for producing same, and transparent laminate |
| JP2012052084A (en) * | 2010-08-05 | 2012-03-15 | New Tac Kasei Co Ltd | Double-sided adhesive sheet, double-sided adhesive sheet with release sheet, method for manufacturing the same, and transparent laminate |
| JP4918166B1 (en) * | 2011-02-14 | 2012-04-18 | 新タック化成株式会社 | Double-sided pressure-sensitive adhesive sheet, double-sided pressure-sensitive adhesive sheet with release sheet, method for producing the same, and transparent laminate |
| JP2014136746A (en) * | 2013-01-17 | 2014-07-28 | Nitto Denko Corp | Protective sheet for chemical solution treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4179685B2 (en) | 2008-11-12 |
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