JP2000273406A - Adhesive tape - Google Patents
Adhesive tapeInfo
- Publication number
- JP2000273406A JP2000273406A JP11085207A JP8520799A JP2000273406A JP 2000273406 A JP2000273406 A JP 2000273406A JP 11085207 A JP11085207 A JP 11085207A JP 8520799 A JP8520799 A JP 8520799A JP 2000273406 A JP2000273406 A JP 2000273406A
- Authority
- JP
- Japan
- Prior art keywords
- acrylic
- adhesive
- adhesive tape
- weight
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は剥離紙が仮着され、
または背面剥離処理された粘着テ−プに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention
Or, it relates to an adhesive tape subjected to a back surface peeling treatment.
【０００２】[0002]
【従来の技術】粘着テ−プにおいては巻回構造乃至は積
層構造で保管されるので、剥離紙の仮着または背面剥離
処理が必要であり、従来シリコ−ン系剥離剤、フッ素系
剥離剤または長鎖アルキル基含有の剥離剤で処理した剥
離紙を仮着するか、それらの剥離剤で背面剥離処理して
いる。2. Description of the Related Art Since an adhesive tape is stored in a wound structure or a laminated structure, it is necessary to temporarily attach a release paper or a back surface release treatment, and a conventional silicone-based release agent and a fluorine-based release agent are required. Alternatively, release paper treated with a release agent containing a long-chain alkyl group is temporarily attached, or a back surface release treatment is performed with such a release agent.
【０００３】[0003]
【発明が解決しようとする課題】而るに、これらの粘着
テ−プにおいては、保存中に粘着剤とシリコ−ン系剥離
剤等とが接触するので、その処理剤の一部の粘着剤表面
への転移が避けられない。近来、粘着テ−プの利用分野
が著しく拡大され、ハ−ドディスク装置を含む精密電子
機器の分野でも多量に使用されている。しかるに、ハ−
ドディスク装置に使用する粘着テ−プに上記シリコ−ン
系剥離剤等の転移が生じると、転移シリコ−ンや不純物
として含まれるシリコ−ンオイルの揮発成分が読み取り
ヘッドやディスク面に付着してクラッシュ等の障害が惹
起される畏れがある。従って、シリコ−ン系剥離剤等に
よらずに剥離処理した粘着テ−プの開発が望まれる。However, in these pressure-sensitive adhesive tapes, since the pressure-sensitive adhesive and the silicone-based release agent come into contact during storage, a part of the pressure-sensitive adhesive of the processing agent is used. Transfer to the surface is inevitable. 2. Description of the Related Art In recent years, the application field of adhesive tape has been remarkably expanded, and the tape has been widely used in the field of precision electronic equipment including a hard disk drive. However, ha
When the silicone-based release agent or the like is transferred to an adhesive tape used in a disk drive, volatile components of the transferred silicone or silicon oil contained as impurities adhere to the read head or the disk surface. There is a fear that obstacles such as crashes may be caused. Therefore, it is desired to develop an adhesive tape which has been subjected to a release treatment without using a silicone-based release agent.
【０００４】而るに、本発明者等は予想外にも、特定の
アクリル系粘着剤の組成において架橋密度を高くすれ
ば、通常のアクリル系、ゴム系またはシリコ−ン系粘着
剤に対し従来のシリコ−ン系剥離剤と同等の剥離性を呈
させ得ることを知った。粘着剤同志では接触角が小さく
なるから濡れ性がよくなり、また接触界面が融合して剥
離が凝集破壊になり易いと予想されるが、予想外にも架
橋度の調整によって従来の剥離処理剤と同等の剥離性を
保証し得ることを知った。[0004] The present inventors have unexpectedly found that if the crosslink density is increased in the composition of a specific acrylic pressure-sensitive adhesive, conventional acrylic, rubber-based or silicone-based pressure-sensitive adhesives can be used. It was found that the same release property as that of the silicone-based release agent can be exhibited. Adhesives are expected to improve the wettability because the contact angle becomes smaller, and the peeling is likely to cause cohesive failure due to fusion of the contact interface. It has been found that the same peeling property can be guaranteed.
【０００５】本発明の目的は、上記予想外の知見に基づ
き、アクリル系、ゴム系またはシリコ−ン系粘着剤等の
通常の粘着剤を使用した粘着テ−プの剥離紙の剥離処理
剤や背面処理剤に、架橋により高ゲル分率としたアクリ
ル系粘着剤を用いてハ−ドディスク等の精密電子機器の
分野でも安全に使用できる粘着テ−プを提供することに
ある。An object of the present invention is to provide a release agent for a release paper of an adhesive tape using a normal adhesive such as an acrylic, rubber or silicone adhesive based on the above-mentioned unexpected findings. It is an object of the present invention to provide an adhesive tape which can be safely used in the field of precision electronic equipment such as a hard disk by using an acrylic adhesive having a high gel fraction by crosslinking as a back treatment agent.
【０００６】[0006]
【課題を解決するための手段】本発明に係る一の粘着テ
−プは、支持基材の片面にアクリル系粘着剤を架橋によ
って高ゲル分率としたアクリル系剥離剤層を設け、同支
持基材の他面にアクリル系、ゴム系またはシリコ−ン系
粘着剤層を設けたことを特徴とする構成である。According to one aspect of the present invention, there is provided an adhesive tape having an acrylic release agent layer having a high gel fraction obtained by crosslinking an acrylic adhesive on one side of a supporting base material. An acrylic, rubber-based or silicone-based pressure-sensitive adhesive layer is provided on the other surface of the base material.
【０００７】本発明に係る別の粘着テ−プは、アクリル
系粘着剤を架橋によって高ゲル分率としたアクリル系剥
離剤層を片面に設けたテ−プのその片面を、アクリル
系、ゴム系またはシリコ−ン系粘着剤層を有する粘着テ
−プ本体の粘着剤層に貼り合わせたことを特徴とする構
成であり、粘着テ−プ本体の粘着剤を架橋によって高ゲ
ル分率とされたアクリル系粘着剤とすることもできる。[0007] Another adhesive tape according to the present invention is a tape provided with an acrylic release agent layer having a high gel fraction by crosslinking an acrylic adhesive on one surface. Characterized in that the adhesive of the pressure-sensitive adhesive tape body has a high gel fraction by cross-linking. Acrylic adhesives can also be used.
【０００８】本発明に係る他の別の粘着テ−プは、支持
基材の両面にアクリル系粘着剤を架橋によって高ゲル分
率としたアクリル系剥離剤を設けたテ−プの両面に、ア
クリル系、ゴム系またはシリコ−ン系粘着剤層を有する
粘着テ−プ本体の粘着剤層を貼り合わせたことを特徴と
する構成である。Another adhesive tape according to the present invention is a tape provided with an acrylic release agent having a high gel fraction by crosslinking an acrylic adhesive on both surfaces of a support base material. The present invention is characterized in that an adhesive layer of an adhesive tape body having an acrylic, rubber or silicone adhesive layer is attached.
【０００９】上記のアクリル系剥離剤は、アクリル酸エ
ステルとアクリル酸との共重合体１００重量部に多官能
エポキシ基含有の架橋剤を０．５〜２５重量部添加した
組成にでき、アクリル酸エステルには炭素数が４〜１２
のものを使用し、アクリル酸エステルとアクリル酸との
共重合比は９９／１〜８８／１２、好ましくは９８／２
〜９４／６とし、架橋剤には１分子中にエポキシ基を４
箇、３級アミンのＮを４箇有する多官能エポキシ基含有
化合物を使用できるThe above-mentioned acrylic release agent has a composition in which 0.5 to 25 parts by weight of a polyfunctional epoxy group-containing crosslinking agent is added to 100 parts by weight of a copolymer of an acrylic ester and acrylic acid. Esters have 4 to 12 carbon atoms
The copolymerization ratio of acrylic acid ester and acrylic acid is 99/1 to 88/12, preferably 98/2.
９４94/6, and the crosslinking agent contains 4 epoxy groups per molecule.
A polyfunctional epoxy group-containing compound having four N of tertiary amine can be used.
【００１０】本発明で使用するアクリル系剥離剤におい
て、アクリル酸エステルにアクリル酸を共重合させる理
由は、ポリマ−鎖に架橋点となる官能基（カルボキシル
基）を導入するためである。[0010] In the acrylic release agent used in the present invention, the reason that acrylic acid is copolymerized with the acrylic ester is to introduce a functional group (carboxyl group) serving as a crosslinking point into the polymer chain.
【００１１】上記架橋剤の配合量を０．５〜２５重量部
とする理由は、０．５重量部未満ではタックを所望程度
に低くし得ず、２５重量部を越えてもゲル分率がそれ以
上あがらずに効果がなく、場合によっては未反応物が粘
着付与剤のように作用して粘着感が増すからである。The reason that the amount of the crosslinking agent is 0.5 to 25 parts by weight is that if the amount is less than 0.5 part by weight, the tack cannot be reduced to a desired degree, and even if the amount exceeds 25 parts by weight, the gel fraction is too low. This is because there is no effect without further raising, and in some cases, the unreacted substance acts like a tackifier to increase the tackiness.
【００１２】上記アクリル酸エステルとしては、炭素数
が４〜１２のアクリル酸エステル、例えば炭素数４のア
クリル酸ブチル、炭素数８のアクリル酸イソオクチル、
炭素数９のアクリル酸イソニノル、炭素数１２のアクリ
ル酸ラウリル等を挙げることができる。As the acrylate, an acrylate having 4 to 12 carbon atoms, such as butyl acrylate having 4 carbon atoms, isooctyl acrylate having 8 carbon atoms,
Examples include isoninol acrylate having 9 carbon atoms and lauryl acrylate having 12 carbon atoms.
【００１３】上記１分子中にエポキシ基を４箇、３級ア
ミンのＮを４箇有する多官能エポキシ基含有化合物を好
ましい架橋剤として使用する理由は、反応性、架橋構造
から多官能エポキシ基を含有するものの中でも、３級ア
ミンを有するものが反応触媒として作用することが期待
されるからである。The reason why the compound containing a polyfunctional epoxy group having four epoxy groups and four tertiary amines N in one molecule is used as a preferable crosslinking agent is that the compound having a polyfunctional epoxy group is preferred because of its reactivity and crosslinked structure. This is because, among those containing tertiary amines, those having tertiary amines are expected to act as reaction catalysts.
【００１４】本発明において使用するアクリル系剥離剤
は、通常のアクリル系粘着剤のゲル分率がほぼ６０％〜
８０％であるのに対し、９０％以上、好ましくは９４％
以上であり、以下高ゲル分率アクリル系粘着剤というこ
ともある。かかる高ゲル分率アクリル系粘着剤は、アク
リル系ポリマ−鎖に上記カルボキシル基以外の官能基、
例えば水酸基、エポキシ基を導入し、そのペンダント官
能基と反応する架橋剤で架橋することにより、或いは、
相互作用があり得る多数の官能基をポリマ−鎖中に導入
し、分子間架橋することにより得ることも可能である。The acrylic release agent used in the present invention has a gel fraction of about 60% or more of an ordinary acrylic pressure-sensitive adhesive.
80%, 90% or more, preferably 94%
As described above, hereinafter, it may be referred to as a high gel fraction acrylic pressure-sensitive adhesive. Such a high gel fraction acrylic pressure-sensitive adhesive has a functional group other than the carboxyl group on the acrylic polymer chain,
For example, by introducing a hydroxyl group or an epoxy group and crosslinking with a crosslinking agent that reacts with the pendant functional group, or
It is also possible to introduce a large number of functional groups capable of interacting into the polymer chain and obtain them by intermolecular crosslinking.
【００１５】上記アクリル酸エステルに代え、メタアク
リル酸エステルまたはアクリル酸エステルとメタアクリ
ル酸エステルの組合せを使用することも可能である。Instead of the above acrylate, it is also possible to use methacrylate or a combination of acrylate and methacrylate.
【００１６】[0016]
【発明の実施の形態】以下、図面を参照しつつ本発明の
実施の形態について説明する。図１は本発明に係る粘着
テ−プの一例を示し、支持基材１の片面に通常のアクリ
ル系、ゴム系またはシリコ−ン系粘着剤２を塗工し、同
支持基材１の他面にアクリル系粘着剤を架橋によって高
ゲル分率としたアクリル系剥離剤３を塗工した構成であ
り、通常、テ−プ芯に巻回した状態で取り扱われる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a pressure-sensitive adhesive tape according to the present invention, in which a normal acrylic, rubber or silicone pressure-sensitive adhesive 2 is applied to one side of a support substrate 1, and the other side of the support substrate 1 is coated. The surface is coated with an acrylic release agent 3 having a high gel fraction by crosslinking an acrylic adhesive, and is usually handled in a state wound around a tape core.
【００１７】図２は本発明に係る粘着テ−プの別例を示
し、支持基材１の片面にアクリル系剥離剤３を塗工した
テ−プＡのアクリル系剥離剤層面３’を、支持基材１０
にアクリル系、ゴム系またはシリコ−ン系粘着剤２を塗
工した通常の粘着テ−プ本体Ｂの粘着剤層面２’に貼り
合わせた構成でありる。FIG. 2 shows another example of the adhesive tape according to the present invention, in which an acrylic release agent layer surface 3 'of a tape A in which an acrylic release agent 3 is coated on one surface of a support substrate 1, is provided. Support substrate 10
And an acrylic, rubber, or silicone-based pressure-sensitive adhesive 2 is applied to the pressure-sensitive adhesive layer surface 2 'of a normal pressure-sensitive adhesive tape body B.
【００１８】図３は本発明に係る粘着テ−プの他の別例
を示し、支持基材１の片面にアクリル系剥離剤３を塗工
したテ−プａ，Ａをアクリル系剥離剤面同志において貼
り合わせ、両テ−プａ，Ａを軽タックラベルとして使用
するようにした構成であり、ゴミになるものが無く、省
資源化に有利である。なお、両テ−プａ，Ａのアクリル
系剥離剤の架橋密度は高ゲル分率（９０％以上、好まし
くは９６％以上）のもとで等しくすること、または異な
らせることの何れであってもよい。FIG. 3 shows another example of the pressure-sensitive adhesive tape according to the present invention. Tapes A and A in which an acrylic release agent 3 is coated on one surface of a support substrate 1 are used as the acrylic release agent surface. Since both tapes a and A are used as a light tack label, they are stuck together, and there is no waste, which is advantageous for resource saving. The crosslink densities of the acrylic release agents of both tapes a and A are either equal under a high gel fraction (90% or more, preferably 96% or more) or are made different. Is also good.
【００１９】図４は本発明に係る粘着テ−プの上記とは
別の例を示し、支持基材１の両面にアクリル系剥離剤
３，３を塗工したテ−プＡ’の両面に、支持基材１０に
通常のアクリル系、ゴム系またはシリコ−ン系粘着剤２
を塗工した粘着テ−プ本体Ｂを貼り合わせた構成であ
り、例えば、打ち抜きやハ−フカット等の加工をして二
枚の粘着テ−プ本体を強タックラベルとして使用でき
（テ−プ芯を剥離紙として使用）、剥離紙を一枚で済ま
しえるので、この場合も省資源化に有利である。FIG. 4 shows another example of the pressure-sensitive adhesive tape according to the present invention. The adhesive tape is coated on both sides of a support base material 1 with acrylic release agents 3, 3 on both sides. Acrylic, rubber or silicone based adhesive 2 on support substrate 10
The adhesive tape main body B coated with the adhesive tape is bonded, and for example, two adhesive tape main bodies can be used as a strong tack label by processing such as punching and half cutting (tape). The core can be used as release paper), and only one release paper can be used, which is also advantageous for resource saving.
【００２０】上記の各実施例において、通常の粘着剤２
の層厚みは通常２０〜６０μｍとされ、アクリル系剥離
剤３の層厚みは通常の粘着剤層の厚みよりも５〜１０μ
ｍ程度薄くされる。また、上記支持基材１，１０として
は、プラスチックフィルム（例えばポリエチレンテレフ
タレ−トエステル、ポリプロピレン、ポリエチレン、ポ
リエチレンナフタレ−トエステル、ポリイミド等）や紙
または布或いは不織布、更に片面または両面にポリエチ
レン、ポリプロピレンをラミネ−トし、またはポリビニ
ルアルコ−ルやポリ酢酸ビニル等をコ−ティングした紙
または布或いは不織布を使用できるが、支持基材１には
アクリル系剥離剤層３との界面剥離を防止するために特
に投錨性に優れたものを使用することが好ましい。In each of the above embodiments, the ordinary adhesive 2
Is usually 20 to 60 μm, and the layer thickness of the acrylic release agent 3 is 5 to 10 μm more than the thickness of the normal pressure-sensitive adhesive layer.
m. Examples of the support base materials 1 and 10 include a plastic film (for example, polyethylene terephthalate ester, polypropylene, polyethylene, polyethylene naphthalate ester, polyimide, etc.), paper or cloth or nonwoven fabric, and polyethylene or polypropylene on one or both sides. Or a paper, cloth or non-woven fabric coated with polyvinyl alcohol, polyvinyl acetate, or the like can be used, but the support substrate 1 prevents interfacial peeling with the acrylic release agent layer 3. For this reason, it is preferable to use a material having particularly excellent anchoring properties.
【００２１】[0021]
【実施例】〔実施例１〕図１に示す構成である。アクリ
ル酸２エチルヘキシル９８重量部とアクリル酸２重量部
にベンゾイルパ−オキサイド０．４重量部を添加し、ト
ルエン中で溶液共重合して得たポリマ−１００重量部に
対し、４官能エポキシ基含有架橋剤（三菱ガス化学社
製、商品名テトラッド）を１０重量部となるように添加
した溶液を調整し、この溶液を厚み５０μｍのポリエス
テルフィルムに塗布し、１００℃×５分で熱風乾燥して
片面にアクリル系剥離剤を設けたテ−プを得た。更に、
アクリル酸ブチル９８重量部とアクリル酸２重量部にベ
ンゾイルパ−オキサイド０．４重量部添加し、トルエン
中で溶液共重合して得たポリマ−１００重量部に対し、
ポリイソシアナ−ト架橋剤（日本ポリウレタン社製、商
品名コロネ−トＬ）を２重量部添加した溶液を調整し、
これを前記テ−プの他面に塗布して１００℃×５分で熱
風乾燥し厚み３０μｍの通常のアクリル系粘着剤層を設
けた。[Embodiment 1] This embodiment has the structure shown in FIG. Addition of 0.4 parts by weight of benzoyl peroxide to 98 parts by weight of 2-ethylhexyl acrylate and 2 parts by weight of acrylic acid, and 100 parts by weight of a polymer obtained by solution copolymerization in toluene. A solution prepared by adding 10 parts by weight of an agent (manufactured by Mitsubishi Gas Chemical Company, trade name: Tetrad) was prepared, and the solution was applied to a polyester film having a thickness of 50 μm, dried at 100 ° C. for 5 minutes with hot air, and dried on one side. A tape provided with an acrylic release agent was obtained. Furthermore,
To 98 parts by weight of butyl acrylate and 2 parts by weight of acrylic acid, 0.4 parts by weight of benzoyl peroxide were added, and 100 parts by weight of a polymer obtained by solution copolymerization in toluene was added.
A solution prepared by adding 2 parts by weight of a polyisocyanate crosslinking agent (trade name: Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) was prepared,
This was coated on the other surface of the tape and dried with hot air at 100 ° C. for 5 minutes to provide a normal acrylic pressure-sensitive adhesive layer having a thickness of 30 μm.
【００２２】〔実施例２及び３〕実施例１に対し、アク
リル系粘着剤層に代え通常の天然ゴム系粘着剤層または
シリコ−ン系粘着剤層を設けた以外、実施例１に同じと
した。Examples 2 and 3 The same as Example 1 except that an ordinary natural rubber-based adhesive layer or a silicone-based adhesive layer was provided instead of the acrylic adhesive layer. did.
【００２３】〔比較例１及び２〕実施例１，２に対し片
面にアクリル系剥離剤を設けたテ−プに代え、片面をシ
リコ−ン剥離処理した片面シリコ−ン剥離処理ポリエス
テルフィルム（三菱樹脂社製，商品名ダイヤホイル＃５
０）を使用した以外、実施例１，２に対し同じとした。[Comparative Examples 1 and 2] Instead of the tapes having an acrylic release agent provided on one side of Examples 1 and 2, a single-sided silicone release-treated polyester film (Mitsubishi Corp.) was used. Resin Co., Ltd., diamond foil # 5
0), except that Example 1 and 2 were used.
【００２４】〔比較例３〕ポリエステルフィルムを何ら
処理せず、粘着剤層は実施例１と同じとした。これらの
実施例品及び比較例品の粘着テ−プについて、粘着テ−
プの背面に同じテ−プを張付け、背面に対する粘着力を
１８０°ピ−ルで測定し〔自背面剥離力（Ｎ／５０mm
）〕、更にステンレス板に対する１８０°ピ−ル粘着
力〔粘着力（Ｎ／５０mm ）〕をＪＩＳＣ−２１０７に
準じて測定したところ、表１に示す通りであった。Comparative Example 3 The polyester film was not treated at all and the pressure-sensitive adhesive layer was the same as in Example 1. For the adhesive tapes of these examples and comparative examples,
Attach the same tape to the back of the tape and measure the adhesion to the back with a 180 ° peel [peeling force of back face (N / 50 mm)
)], And the 180 ° peel adhesion to a stainless steel plate [adhesion (N / 50 mm)] was measured in accordance with JISC-2107.
【００２５】[0025]
【表１】 表１ 実施例１ 実施例２ 実施例３ 剥離層の構成 アクリル系剥離剤 アクリル系剥離剤 アクリル系剥離剤 粘着剤 アクリル系 天然ゴム シリコ−ン系 自背面剥離力 ０．０３ ０．０４ ０．０４ 粘着力 ８．４ ７．６ ６．５ 比較例１ 比較例２ 比較例３ 剥離層の構成 シリコ−ン系剥離剤 長鎖アルキル系剥離剤 なし 粘着剤 アクリル系 アクリル系 アクリル系 自背面剥離力 ０．０１ ０．０４ ５．２ 粘着力 ６．２ ６．２ ８．４Table 1 Example 1 Example 1 Example 2 Example 3 Composition of Release Layer Acrylic Release Agent Acrylic Release Agent Acrylic Release Agent Adhesive Acrylic Natural Rubber Silicone Self-Back Peeling Force 0.03 0. 04 0.04 Adhesive strength 8.4 7.6 6.5 Comparative example 1 Comparative example 2 Comparative example 3 Composition of release layer Silicone-based release agent Long-chain alkyl-based release agent None Adhesive Acrylic Acrylic Acrylic Back surface peel strength 0.01 0.04 5.2 Adhesive strength 6.2 6.2 8.4
【００２６】実施例１〜３と比較例１，２との自背面剥
離力の比較から、本発明に係る粘着テ−プにおけるアク
リル系剥離剤が従来のシリコ−ン系剥離剤や長鎖アルキ
ル系剥離剤と同等以上の剥離効果を奏することが明らか
である。また、実施例１の粘着力が比較例１，２の同じ
アクリル系粘着剤のもとでの粘着力に較べ高く、かつ比
較例３の同じアクリル系粘着剤のもとでの粘着力に等し
いことから、本発明に係る粘着テ−プにおいては、剥離
剤の粘着剤表面への転移が実質的にないと推定できる。From the comparison of the self-back surface peeling force between Examples 1 to 3 and Comparative Examples 1 and 2, the acrylic release agent in the adhesive tape according to the present invention was changed to the conventional silicone release agent or long-chain alkyl. It is clear that a release effect equal to or higher than that of the system release agent is exerted. Further, the adhesive force of Example 1 is higher than the adhesive force of Comparative Examples 1 and 2 under the same acrylic adhesive, and is equal to the adhesive force of Comparative Example 3 under the same acrylic adhesive. From the above, it can be assumed that the adhesive tape according to the present invention has substantially no transfer of the release agent to the adhesive surface.
【００２７】〔実施例４〜８〕図２に示す構成である。
アクリル酸２エチルヘキシル９８重量部とアクリル酸２
重量部にベンゾイルパ−オキサイド０．４重量部添加
し、トルエン中で溶液共重合して得たポリマ−１００重
量部に対し、４官能エポキシ基含有架橋剤（三菱ガス化
学社製、商品名テトラッド）をそれぞれ、０．５重量
部、１重量部、５重量部、１０重量部、２０重量部とな
るように添加した溶液を調整し、この溶液を厚み５０μ
ｍのポリエステルフィルムに塗布し、１００℃×５分で
熱風乾燥して厚み２０μｍの架橋度の異なるアクリル系
剥離剤層を設けた５種のテ−プを得、通常のアクリル系
粘着テ−プ（日東電工社製アクリル系粘着テ−プＮｏ．
３１Ｂ）に貼付けてセパレ−ト付き粘着テ−プを作成し
た。各セパレ−ト付き粘着テ−プについてセパレ−トの
１８０°ピ−ル剥離力（Ｎ／５０mm ）を測定したとこ
ろ、表２の通りであった。また、各セパレ−ト単体での
ステンレス板に対する１８０°ピ−ル剥離力〔粘着力
（Ｎ／５０mm ）〕をＪＩＳＣ−２１０７に準じて測定
したところ、表２に示す通りであった。表２にはゲル分
（％）も表示してある。ただし、ゲル分の測定方法は次
の通りである。接着シートから感圧接着剤が２．０ｇと
なる量を採取精秤したのち、精秤した円筒ろ紙につめソ
ツクレー抽出器にて１５０ｍｌの酢酸エチルにて抽出処
理を行う（８０〜９０℃×２４時間抽出）。処理後、円
筒ろ紙を取り出し、乾燥後の重量を測定し、 ゲル分（重量％）＝（乾燥後ろ紙重量−ろ紙重量）×１
００／（感圧性接着剤重量） にて算出する。[Embodiments 4 to 8] The configuration shown in FIG.
98 parts by weight of 2-ethylhexyl acrylate and acrylic acid 2
0.4 parts by weight of benzoyl peroxide was added to 100 parts by weight of a polymer obtained by solution copolymerization in toluene, and a tetrafunctional epoxy group-containing cross-linking agent (trade name: Tetrad, manufactured by Mitsubishi Gas Chemical Company) was added to 100 parts by weight of the polymer. Were added so as to be 0.5 parts by weight, 1 part by weight, 5 parts by weight, 10 parts by weight, and 20 parts by weight, respectively.
m, and dried with hot air at 100 ° C. for 5 minutes to obtain five types of tapes having an acrylic release agent layer having a thickness of 20 μm and different degrees of cross-linking. (Acrylic adhesive tape No. manufactured by Nitto Denko Corporation.
31B) to prepare an adhesive tape with a separator. Table 2 shows the 180 ° peeling force (N / 50 mm) of the separation tape measured for each of the pressure-sensitive adhesive tapes with separation. Further, the 180 ° peel force [adhesive strength (N / 50 mm)] of each separator alone with respect to the stainless steel plate was measured according to JISC-2107, and as shown in Table 2. Table 2 also shows the gel content (%). However, the method for measuring the gel content is as follows. After collecting an amount of 2.0 g of the pressure-sensitive adhesive from the adhesive sheet and precisely weighing it, the precisely weighed cylindrical filter paper is caught and extracted with 150 ml of ethyl acetate using a Soclay extractor (80 to 90 ° C. × 24). Time extraction). After the treatment, the cylindrical filter paper was taken out, and the weight after drying was measured. Gel content (% by weight) = (weight of dried back paper−weight of filter paper) × 1
Calculated as 00 / (weight of pressure-sensitive adhesive).
【００２８】[0028]
【表２】 表２ 実施例４ 実施例５ 実施例６ 実施例７ 実施例８ 架橋剤量（重量部） ０．５ １ ５ １０ ２０ 剥離力 ０．１５ ０．１０ ０．０５ ０．０５ ０．０３ 粘着力 ０．２５ ０．２０ ０．１０ ０．１０ ０．０８ ゲル分（％） ９１ ９３ ９６ ９６ ９８TABLE 2 Example 4 Example 5 Example 6 Example 7 Example 7 Example 8 Amount of crosslinking agent (parts by weight) 0.5 15 10 20 Peeling force 0.15 0.10 0.05 0.05 0.05 0 .03 Adhesive strength 0.25 0.20 0.10 0.10 0.08 Gel content (%) 91 93 96 96 98
【００２９】表２の測定結果から、アクリル系剥離剤の
架橋剤の配合量０．５重量部でも本発明の目的を充分に
達成できることが明らかである。さらに、アクリル系剥
離剤塗布テ−プの粘着層に対する剥離力がステンレス板
に対する剥離力よりも小さいことは予想外の事実であ
り、本発明はこの意外性を契機とするものである。From the measurement results shown in Table 2, it is clear that the object of the present invention can be sufficiently achieved even with a blending amount of the crosslinking agent of the acrylic release agent of 0.5 part by weight. Further, it is an unexpected fact that the peeling force of the tape coated with an acrylic release agent on the adhesive layer is smaller than the peeling force on the stainless steel plate, and the present invention is triggered by this unexpectedness.
【００３０】〔実施例９〜１３〕実施例４〜８に対し、
粘着テ−プにアクリル系粘着テ−プに代え通常の天然ゴ
ム粘着テ−プ（日東電工社製天然ゴム粘着テ−プＮｏ．
３７５））を使用した以外、実施例４〜８に同じであ
り、セパレ−トの１８０°ピ−ル剥離力（ｎ／ｍ）を測
定したところ、表３の通りであった。[Examples 9 to 13] In contrast to Examples 4 to 8,
Instead of an acrylic tape, a normal natural rubber pressure-sensitive tape (Nitto Denko Corporation natural rubber pressure-sensitive tape No.
375)) was the same as in Examples 4 to 8 except that the 180 ° peeling force (n / m) of the separator was measured.
【００３１】[0031]
【表３】 表３ 実施例９ 実施例５ 実施例６ 実施例７ 実施例８ 架橋剤量（重量部）０．５ １ ５ １０ ２０ 剥離力 ０．１７ ０．１２ ０．０６ ０．０６ ０．０５Table 3 Example 9 Example 5 Example 6 Example 7 Example 7 Example 8 Crosslinking agent amount (parts by weight) 0.5 15 10 20 Peeling force 0.17 0.12 0.06 0.060 .05
【００３２】表２と表３との比較から、粘着テ−プ本体
の粘着剤に関係なく、アクリル系剥離剤の架橋剤の下限
配合量０．５重量部で本発明の目的を充分に達成できる
ことが明らかである。From the comparison between Table 2 and Table 3, the object of the present invention can be sufficiently achieved with the lower limit of the cross-linking agent of the acrylic release agent being 0.5 part by weight, regardless of the pressure-sensitive adhesive of the pressure-sensitive adhesive tape body. It's clear what you can do.
【００３３】〔実施例４’〜８’〕図２に示す構成であ
る。実施例４〜８に対し、アクリル系剥離剤付きテ−プ
に次のものを使用した以外、実施例４〜８に同じとし
た。すなわち、アクリル酸ブチル９５重量部とアクリル
酸５重量部にベンゾイルパ−オキサイド０．４重量部添
加し、トルエン中で溶液共重合して得たポリマ−１００
重量部に対し、４官能エポキシ基含有架橋剤（三菱ガス
化学社製、商品名テトラッド）をそれぞれ、０．５重量
部、１重量部、５重量部、１０重量部、２０重量部とな
るように添加した溶液を調整し、この溶液を厚み５０μ
ｍのポリエステルフィルムに塗布し、１００℃×５分で
熱風乾燥して厚み２０μｍの架橋度の異なるアクリル系
剥離剤層を片面に設けた５種のテ−プを得、各テ−プを
セパレ−タとして使用した。各セパレ−ト付き粘着テ−
プについてセパレ−トの１８０°ピ−ル剥離力（ｎ／ｍ
）を測定したところ、表４の通りであった。表４には
ゲル分率の測定結果も示してある。また、各セパレ−ト
単体でのステンレス板に対する１８０°ピ−ル剥離力
〔粘着力（ｎ／ｍ ）〕をＪＩＳＣ−２１０７に準じて
測定したところ、表４に示す通りであった。Embodiments 4 'to 8' The configuration shown in FIG. Examples 4 to 8 were the same as Examples 4 to 8 except that the following tapes with an acrylic release agent were used. That is, polymer 100 obtained by adding 0.4 parts by weight of benzoyl peroxide to 95 parts by weight of butyl acrylate and 5 parts by weight of acrylic acid and performing solution copolymerization in toluene.
0.5 parts by weight, 1 part by weight, 5 parts by weight, 10 parts by weight, and 20 parts by weight of a tetrafunctional epoxy group-containing cross-linking agent (trade name, manufactured by Mitsubishi Gas Chemical Co., Ltd.) with respect to parts by weight. Was adjusted to a thickness of 50 μm.
m, and dried with hot air at 100 ° C. for 5 minutes to obtain five types of tapes having a 20 μm-thick acrylic release agent layer having a different degree of cross-linking on one side, and separating each tape. -Used as data. Adhesive tape with separate
180 ° peeling force (n / m)
) Was measured, and the results were as shown in Table 4. Table 4 also shows the measurement results of the gel fraction. Further, the peeling force [adhesive force (n / m)] of each separator alone against a stainless steel plate was measured according to JISC-2107, and as shown in Table 4.
【００３４】[0034]
【表４】 表４ 実施例４’ 実施例５’ 実施例６’ 実施例７’ 実施例８’ 架橋剤量 ０．５ １ ５ １０ ２０ 剥離力 ０．１５ ０．１０ ０．０５ ０．０５ ０．０３ 粘着力 ０．３５ ０．２５ ０．１５ ０．１５ ０．１０ ゲル分率（％）９０ ９2 ９４ ９６ ９８ Table 4 Example 4 ′ Example 5 ′ Example 6 ′ Example 7 ′ Example 8 ′ Crosslinking agent amount 0.5 15 10 20 Peeling force 0.15 0.10 0.05 0.05 0.05 0.03 Adhesive strength 0.35 0.25 0.15 0.15 0.10 Gel fraction (%) 90 92 94 96 98
【００３５】表４の測定結果から、アクリル酸エステル
の種類が異なっても、アクリル系剥離剤の架橋剤の下限
配合量０．５重量部で本発明の目的を充分に達成できる
ことが明らかである。さらに、アクリル系剥離剤塗布テ
−プの粘着層に対する剥離力がステンレス板に対する剥
離力よりも小さいことの前記の事実がこの表４からも明
らかである。なお、これらの実施例において、粘着テ−
プにはアクリル系粘着テ−プを使用している。From the measurement results in Table 4, it is clear that even if the type of the acrylate ester is different, the object of the present invention can be sufficiently achieved at the lower limit of 0.5 part by weight of the crosslinking agent of the acrylic release agent. . Further, the above fact that the peeling force of the tape coated with the acrylic release agent on the adhesive layer is smaller than the peeling force on the stainless steel plate is apparent from Table 4. In these examples, the adhesive tape was used.
An acrylic adhesive tape is used for the tape.
【００３６】〔実施例９’〜１３’〕実施例４’〜８’
に対し、粘着テ−プにアクリル系粘着テ−プに代え通常
の天然ゴム粘着テ−プ（日東電工社製天然ゴム粘着テ−
プＮｏ．３７５）を使用した以外、実施例４’〜８’に
同じであり、セパレ−トの１８０°ピ−ル剥離力（ｎ／
ｍ ）を測定したところ、表５の通りであった。[Embodiments 9 'to 13'] Embodiments 4 'to 8'
On the other hand, a normal natural rubber adhesive tape (Nitto Denko Corporation natural rubber adhesive tape) was used instead of an acrylic adhesive tape.
No. 375), except that 180 ° peeling force (n /
m) was measured, and the results were as shown in Table 5.
【００３７】[0037]
【表５】 表５ 実施例９’ 実施例１０’ 実施例１１’ 実施例１２’ 実施例１３’ 架橋剤量 ０．５ １ ５ １０ ２０ 剥離力 ０．１７ ０．１２ ０．０６ ０．０６ ０．０５Table 5 Example 9 ′ Example 10 ′ Example 11 ′ Example 12 ′ Example 13 ′ Crosslinking agent amount 0.5 1 5 10 20 Peeling force 0.17 0.12 0.06 0.06 0.05
【００３８】〔実施例１４〜１９〕図３に示す構成であ
り、実施例４〜８におけるアクリル系剥離剤層付きテ−
プ〔アクリル酸２エチルヘキシル９８重量部とアクリル
酸２重量部にベンゾイルパ−オキサイド０．４重量部添
加し、トルエン中で溶液共重合して得たポリマ−１００
重量部に対し、４官能エポキシ基含有架橋剤（三菱ガス
化学社製、商品名テトラッド）をそれぞれ、０．５重量
部、１重量部、５重量部、１０重量部、２０重量部とな
るように添加した溶液を調整し、この溶液を厚み５０μ
ｍのポリエステルフィルムに塗布し、１００℃×５分で
熱風乾燥して厚み２０μｍの架橋度の異なるアクリル系
剥離剤層を設けて得た５種のテ−プのアクリル系剥離剤
面同志を貼り合わせて各実施例品を作成した。これらの
各実施例品について初期、７０℃１週間経過後及び６０
℃×９０％ＲＨのもとでの１週間経過後でのＴ字状に剥
離するときの剥離力を測定したところ表６の通りであっ
た。[Embodiments 14 to 19] The structure shown in FIG.
[Polymer 100 obtained by adding 0.4 parts by weight of benzoyl peroxide to 98 parts by weight of 2-ethylhexyl acrylate and 2 parts by weight of acrylic acid, and performing solution copolymerization in toluene.
0.5 parts by weight, 1 part by weight, 5 parts by weight, 10 parts by weight, and 20 parts by weight of a tetrafunctional epoxy group-containing cross-linking agent (trade name, manufactured by Mitsubishi Gas Chemical Co., Ltd.) with respect to parts by weight. Was adjusted to a thickness of 50 μm.
m, and dried with hot air at 100 ° C. for 5 minutes to form a 20 μm thick acrylic release agent layer having a different degree of crosslinking. In addition, each example product was prepared. Initially, after 1 week at 70 ° C. and 60
The peeling force when peeling in a T-shape after one week at 90 ° C. × 90% RH was measured.
【００３９】[0039]
【表６】 表６ 実施例１４ 実施例１５ 実施例１６ 架橋剤量（重量部） ０．５ １ ５ 初期剥離力 ０．０５ ０．０４ ０．０２ 加温１週間後の剥離力 ０．０８ ０．０６ ０．０３ 加温加湿１週間後の剥離力 ０．０６ ０．０５ ０．０４ 実施例１７ 実施例１８ 架橋剤量（重量部） １０ ２０ 初期剥離力 ０．０２ ０．０２ 加温１週間後の剥離力 ０．０３ ０．０３ 加温加湿１週間後の剥離力 ０．０４ ０．０４Table 6 Example 14 Example 15 Example 15 Example 16 Amount of crosslinking agent (parts by weight) 0.5 15 Initial peeling force 0.05 0.04 0.02 Peeling force after one week of heating 0.08 0.06 0.03 Peeling force after one week of heating and humidification 0.06 0.05 0.04 Example 17 Example 18 Amount of crosslinking agent (parts by weight) 10 20 Initial peeling force 0.02 0.02 Heating Peeling force after one week 0.03 0.03 Peeling force after one week of heating and humidification 0.04 0.04
【００４０】表６の測定結果から明らかな通り、加温し
ても剥離力が安定であり、アクリル系剥離剤が低分子量
添加物を含まないために従来の剥離処理剤とは異なり、
低分子成分のアクリル系剥離剤表面への移行がないと推
定できる。As is evident from the measurement results in Table 6, the release force is stable even when heated, and unlike the conventional release treatment agent, since the acrylic release agent does not contain a low molecular weight additive,
It can be estimated that there is no migration of low molecular components to the surface of the acrylic release agent.
【００４１】[0041]
【発明の効果】本発明に係る粘着テ−プは、アクリル系
粘着剤の架橋密度を高くしてゲル分率を高くすれば、意
外にも粘着剤に対して優れた剥離性を呈することを知
り、この認識を基礎として構成されており、従来のシリ
コ−ン系、フッ素系または長鎖アルキル系剥離剤による
ことなく粘着テ−プの剥離処理を行い得、粘着テ−プを
精密電子機器の分野に、剥離剤の転移分や揮発分の読み
取りヘッドやディスク面への付着に起因するクラッシュ
等の障害なく、安全に使用できる。The pressure-sensitive adhesive tape according to the present invention surprisingly exhibits excellent release properties from the pressure-sensitive adhesive if the crosslink density of the acrylic pressure-sensitive adhesive is increased to increase the gel fraction. Knowing that, based on this recognition, the adhesive tape can be peeled off without using a conventional silicone-based, fluorine-based or long-chain alkyl-based peeling agent, and the adhesive tape can be precision electronic equipment. It can be safely used in the field of (1) without any trouble such as a crash caused by the transfer of the release agent or the volatile matter adhered to the read head or the disk surface.
【図１】本発明に係る粘着テ−プの一例を示す図面であ
る。FIG. 1 is a drawing showing an example of an adhesive tape according to the present invention.
【図２】本発明に係る粘着テ−プの上記とは別の例を示
す図面である。FIG. 2 is a drawing showing another example of the adhesive tape according to the present invention.
【図３】本発明に係る粘着テ−プの上記とは別の例を示
す図面である。FIG. 3 is a drawing showing another example of the adhesive tape according to the present invention.
【図４】本発明に係る粘着テ−プの上記とは別の例を示
す図面である。FIG. 4 is a drawing showing another example of the adhesive tape according to the present invention.
１ 支持基材 ２ 粘着剤 ３ アクリル系剥離剤 １０ 支持基材 DESCRIPTION OF SYMBOLS 1 Support base material 2 Adhesive 3 Acrylic release agent 10 Support base material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長谷川 美次 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内 (72)発明者 有満 幸生 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内 Ｆターム(参考） 4J004 AA05 AA10 AA11 CC02 CC05 CD05 DA02 DB03 EA01 EA04 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Missuji Hasegawa 1-2-1, Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation (72) Inventor Yukio Arimitsu 1-1-1, Shimohozumi, Ibaraki-shi, Osaka No. 2 Nitto Denko Corporation F-term (reference) 4J004 AA05 AA10 AA11 CC02 CC05 CD05 DA02 DB03 EA01 EA04
Claims (7)
によって高ゲル分率としたアクリル系剥離剤層を設け、
同支持基材の他面にアクリル系、ゴム系またはシリコ−
ン系粘着剤層を設けたことを特徴とする粘着テ−プ。1. An acrylic release agent layer having a high gel fraction by crosslinking an acrylic pressure-sensitive adhesive on one side of a supporting substrate,
Acrylic, rubber, or silicone
An adhesive tape provided with an adhesive-based adhesive layer.
率としたアクリル系剥離剤層を片面に設けたテ−プのそ
の片面を、アクリル系、ゴム系またはシリコ−ン系粘着
剤層を有する粘着テ−プ本体の粘着剤層に貼り合わせた
ことを特徴とする粘着テ−プ。2. A tape provided with an acrylic release agent layer having a high gel fraction by crosslinking an acrylic pressure-sensitive adhesive on one side, the other side of which is provided with an acrylic, rubber-based or silicone-based pressure-sensitive adhesive layer. An adhesive tape characterized in that it is attached to an adhesive layer of an adhesive tape body having the adhesive tape.
分率とされたアクリル系粘着剤である請求項２記載の粘
着テ−プ。3. The pressure-sensitive adhesive tape according to claim 2, wherein the pressure-sensitive adhesive of the pressure-sensitive adhesive tape is an acrylic pressure-sensitive adhesive having a high gel fraction by crosslinking.
によって高ゲル分率としたアクリル系剥離剤を設けたテ
−プの両面に、アクリル系、ゴム系またはシリコ−ン系
粘着剤層を有する粘着テ−プ本体の粘着剤層を貼り合わ
せたことを特徴とする粘着テ−プ。4. An acrylic, rubber or silicone adhesive on both sides of a tape provided with an acrylic release agent having a high gel fraction by crosslinking an acrylic adhesive on both sides of a supporting substrate. An adhesive tape characterized in that an adhesive layer of an adhesive tape body having a layer is adhered.
とアクリル酸との共重合体１００重量部に多官能エポキ
シ基含有の架橋剤を０．５〜２５重量部添加した組成で
ある請求項１乃至４何れか記載の粘着テ−プ。5. The composition according to claim 1, wherein the acrylic release agent has a composition in which 0.5 to 25 parts by weight of a polyfunctional epoxy group-containing crosslinking agent is added to 100 parts by weight of a copolymer of acrylic acid ester and acrylic acid. 5. An adhesive tape according to any one of claims 1 to 4.
あり、アクリル酸エステルとアクリル酸との共重合比が
９９／１〜８８／１２である請求項５記載の粘着テ−
プ。6. The adhesive tape according to claim 5, wherein the acrylate ester has 4 to 12 carbon atoms, and the copolymerization ratio of the acrylate ester and acrylic acid is 99/1 to 88/12.
H.
級アミンのＮを４箇有する多官能エポキシ基含有化合物
である請求項５または６記載の粘着テ−プ。7. A crosslinking agent comprising four epoxy groups per molecule,
7. An adhesive tape according to claim 5, which is a compound containing a polyfunctional epoxy group having four N of a secondary amine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11085207A JP2000273406A (en) | 1999-03-29 | 1999-03-29 | Adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11085207A JP2000273406A (en) | 1999-03-29 | 1999-03-29 | Adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000273406A true JP2000273406A (en) | 2000-10-03 |
Family
ID=13852161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11085207A Pending JP2000273406A (en) | 1999-03-29 | 1999-03-29 | Adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000273406A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1477516A1 (en) * | 2002-02-20 | 2004-11-17 | Denki Kagaku Kogyo Kabushiki Kaisha | Static electricity preventing method and method using the method |
| JP2005023255A (en) * | 2003-07-04 | 2005-01-27 | Shinnakamura Kagaku Kogyo Kk | Release treatment agent |
| KR20140121350A (en) * | 2013-04-05 | 2014-10-15 | 닛토덴코 가부시키가이샤 | Pressure-sensitive adhesive tape |
| JP2019188639A (en) * | 2018-04-20 | 2019-10-31 | 東レフィルム加工株式会社 | Release film for silicone adhesive layer and silicone adhesive sheet |
-
1999
- 1999-03-29 JP JP11085207A patent/JP2000273406A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1477516A1 (en) * | 2002-02-20 | 2004-11-17 | Denki Kagaku Kogyo Kabushiki Kaisha | Static electricity preventing method and method using the method |
| EP1477516B1 (en) * | 2002-02-20 | 2008-04-16 | Denki Kagaku Kogyo Kabushiki Kaisha | Antistatic, adhesive sheet and process for its preparation |
| US7544268B2 (en) | 2002-02-20 | 2009-06-09 | Denki Kagaku Kogyo Kabushiki Kaisha | Static electricity preventing method and member using the method |
| JP2005023255A (en) * | 2003-07-04 | 2005-01-27 | Shinnakamura Kagaku Kogyo Kk | Release treatment agent |
| KR20140121350A (en) * | 2013-04-05 | 2014-10-15 | 닛토덴코 가부시키가이샤 | Pressure-sensitive adhesive tape |
| JP2014201672A (en) * | 2013-04-05 | 2014-10-27 | 日東電工株式会社 | Adhesive tape |
| KR102157531B1 (en) | 2013-04-05 | 2020-09-18 | 닛토덴코 가부시키가이샤 | Pressure-sensitive adhesive tape |
| JP2019188639A (en) * | 2018-04-20 | 2019-10-31 | 東レフィルム加工株式会社 | Release film for silicone adhesive layer and silicone adhesive sheet |
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