JP2002088321A - Heat-peeling off type adhesive tape/sheet and method for producing the same - Google Patents
Heat-peeling off type adhesive tape/sheet and method for producing the sameInfo
- Publication number
- JP2002088321A JP2002088321A JP2000278324A JP2000278324A JP2002088321A JP 2002088321 A JP2002088321 A JP 2002088321A JP 2000278324 A JP2000278324 A JP 2000278324A JP 2000278324 A JP2000278324 A JP 2000278324A JP 2002088321 A JP2002088321 A JP 2002088321A
- Authority
- JP
- Japan
- Prior art keywords
- sensitive adhesive
- pressure
- heat
- sheet
- adhesive tape
- 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
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、貼着後の任意な時
に加熱処理により被着体より簡単に剥離できる加熱剥離
型粘着テープ・シート及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-peelable pressure-sensitive adhesive tape / sheet which can be easily peeled off from an adherend by heating at any time after application and a method for producing the same.
【０００２】[0002]
【従来の技術】近年、電気・電子分野などの業界では、
製品の高性能化、高機能化、多品種化などに伴い、部品
の接合に使用される接着剤や粘着剤には高耐熱性、高接
着性、高信頼性などの要求が高まりつつある。特に、作
業性の効率向上や作業環境性の向上などの観点から、液
状接着剤に替わってテープ状やシート状の粘着剤を用い
て各種部品を接合することが多くなっている。特に、各
種電子部品を研磨や切断する際に使用される加工用粘着
テープには、使用後に被着体より簡単に剥離できる機能
を兼ね備えていることが強く要求されている。2. Description of the Related Art In recent years, in industries such as the electric and electronic fields,
As products have higher performance, higher functions, and more varieties, demands for adhesives and pressure-sensitive adhesives used for joining parts, such as high heat resistance, high adhesiveness, and high reliability, are increasing. In particular, from the viewpoint of improving work efficiency and work environment, various components are often joined using a tape-like or sheet-like adhesive instead of a liquid adhesive. In particular, there is a strong demand for a processing adhesive tape used for polishing or cutting various electronic components, which also has a function of easily separating from an adherend after use.
【０００３】従来、このような加工時の仮固定用の用途
には接着剤やワックスが使用されていたが、（１）剥が
す作業に長時間を要する、（２）剥がす際に部品にダメ
ージを与える、（３）部品の洗浄が不可欠である、等の
観点から、粘着テープ・シートを使用することが多くな
っている。これらの粘着テープ・シートは、例えば、半
導体シリコンウェハやシリコンチップ、セラミックコン
デンサ、チップ抵抗、薄膜磁気ヘッド、各種プリント配
線基板やリードフレーム等の固定等に使用される。Conventionally, adhesives and waxes have been used for such temporary fixing purposes during processing, but (1) it takes a long time to peel off, and (2) parts are damaged when peeling off. Adhesive tapes / sheets are often used from the viewpoints of giving, (3) cleaning of parts is indispensable, and the like. These adhesive tapes / sheets are used, for example, for fixing semiconductor silicon wafers, silicon chips, ceramic capacitors, chip resistors, thin-film magnetic heads, various printed wiring boards, lead frames, and the like.
【０００４】粘着テープは、従来から包装用、梱包用、
養生用といった用途に幅広く使用されている。近年、環
境保護、省資源等の観点から、消耗品等の各種日用品の
リサイクル使用が叫ばれており、粘着テープにも剥離時
に被着体にダメージを与えないで剥離できることが強く
要求されつつある。具体的には、各種表面保護やマスキ
ング用途、ラベルやシール用途、結束用途、輸送や移動
時における物品の固定用途等に使用される粘着テープに
は、優れた初期粘着特性と同時に、貼着後の任意な時に
被着体より簡単に剥離できる特性を兼ね備えることが要
求されている。すなわち、初期粘着力や保持力等の粘着
テープとして基本特性に優れ、かつ、剥がしたい時に簡
単に被着体より剥離できる粘着テープの開発が望まれて
いる。従来、このような易剥離型粘着テープとしては、
発泡剤等を粘着剤に混合したものが知られている。例え
ば、発泡剤を含有する粘着剤層を基材層に一定厚さに塗
工し、加熱により発泡剤を発泡あるいは膨張させて、加
熱発泡処理により被着体より簡単に剥離できるようにし
た粘着テープが特公昭５０−１３８７８号公報、特公昭
５１−２４５３４号公報、特開昭５６−６１４６８号公
報、特開昭５６−６１４６９号公報、特開昭６０−２５
２６８１号公報に開示されている。[0004] Adhesive tapes have been used for packaging,
Widely used for applications such as curing. In recent years, from the viewpoints of environmental protection and resource saving, recycling use of various daily necessities such as consumables has been called for, and it has been strongly demanded that adhesive tapes can be peeled without damaging adherends when peeling. . Specifically, adhesive tapes used for various surface protection and masking applications, labels and seal applications, bundling applications, fixing applications for goods during transportation and movement, etc. It is required to have the property that it can be easily peeled off from the adherend at any time. That is, it is desired to develop an adhesive tape having excellent basic properties as an adhesive tape such as an initial adhesive force and a holding force, and which can be easily peeled off from an adherend when it is desired to peel it off. Conventionally, as such an easily peelable adhesive tape,
A mixture of a foaming agent and the like in an adhesive is known. For example, a pressure-sensitive adhesive layer containing a foaming agent is applied to a substrate layer to a constant thickness, and the foaming agent is foamed or expanded by heating, and the heat-foaming treatment allows the adhesive to be easily peeled off from the adherend. The tapes are disclosed in Japanese Patent Publication Nos. Sho 50-13878, Sho 51-24534, JP-A-56-61468, JP-A-56-61469, and JP-A-60-25.
No. 2,681.
【０００５】また、特開平７−６１４５８号公報には、
基材との接着力の強い部分と弱い部分とを分布させた加
熱剥離型粘着テープが開示されている。Further, Japanese Patent Application Laid-Open No. 7-61458 discloses that
There is disclosed a heat-peelable pressure-sensitive adhesive tape in which a portion having a strong adhesive force to a substrate and a portion having a weak adhesive force are distributed.
【０００６】また、特開平６−１８４５０４号公報に
は、平均粒径をコントロールした２種以上の熱膨張性粒
子を配合した加熱剥離型粘着テープが開示されている。Japanese Unexamined Patent Publication (Kokai) No. 6-184504 discloses a heat-peelable pressure-sensitive adhesive tape containing two or more kinds of thermally expandable particles whose average particle diameter is controlled.
【０００７】また、特開平７−９６９６４号公報には凹
凸を付けた基材を使用した加熱剥離型粘着テープが開示
されている。Japanese Patent Application Laid-Open No. 7-96964 discloses a heat-peelable pressure-sensitive adhesive tape using a substrate having irregularities.
【０００８】また、特開平６−３０６３３７号公報には
熱膨張性層と接着剤層とを２層に重ねた加熱剥離型粘着
テープが開示されている。Japanese Patent Application Laid-Open No. 6-306337 discloses a heat-peelable pressure-sensitive adhesive tape in which a heat-expandable layer and an adhesive layer are laminated in two layers.
【０００９】また、特開昭６３−１７９８１号公報に
は、紫外線硬化型粘着剤を使用した加熱剥離型粘着テー
プが開示されている。Japanese Patent Application Laid-Open No. 63-17981 discloses a heat-peelable pressure-sensitive adhesive tape using an ultraviolet-curable pressure-sensitive adhesive.
【００１０】[0010]
【発明が解決しようとする課題】特公昭５０−１３８７
８号公報、特公昭５１−２４５３４号公報、特開昭５６
−６１４６８号公報、特開昭５６−６１４６９号公報、
特開昭６０−２５２６８１号公報に記載された加熱剥離
型粘着テープでは、初期の粘着力を十分に発現し難く、
かつ、初期の粘着力を大きくすると、加熱により十分に
粘着力が低下せず、いずれにしても優れた初期粘着性と
加熱後の易剥離性を両立することが困難であった。Problems to be Solved by the Invention Japanese Patent Publication No. 50-1387
No. 8, JP-B-51-24534, JP-A-56
-61468, JP-A-56-61469,
In the heat-peelable pressure-sensitive adhesive tape described in JP-A-60-252681, it is difficult to sufficiently develop the initial adhesive strength,
In addition, when the initial adhesive strength is increased, the adhesive strength is not sufficiently reduced by heating, and in any case, it is difficult to achieve both excellent initial adhesiveness and easy peelability after heating.
【００１１】特開平７−６１４５８号公報に記載された
加熱剥離型粘着テープの場合は、粘着テープを簡単に製
造することが難しく、特開平７−６１４５８号公報、特
開平６−１８４５０４号公報、特開平７−９６９６４号
公報及び特開平６−３０６３３７号公報に記載された加
熱剥離型粘着テープの場合は、粘着テープを量産性良く
製造することが難しかった。In the case of the heat-peelable pressure-sensitive adhesive tape described in JP-A-7-61458, it is difficult to easily produce the pressure-sensitive adhesive tape, and JP-A-7-61458, JP-A-6-184504, In the case of the heat-peelable pressure-sensitive adhesive tape described in JP-A-7-96964 and JP-A-6-306337, it has been difficult to produce the pressure-sensitive adhesive tape with good mass productivity.
【００１２】特開昭６３−１７９８１号公報に記載され
た加熱剥離型粘着テープは、優れた初期粘着性と加熱後
の易剥離性を両立することが困難であった。The heat-peelable pressure-sensitive adhesive tape described in JP-A-63-17981 has difficulty in achieving both excellent initial tackiness and easy peelability after heating.
【００１３】特に、加熱発泡により被着体より剥離させ
る粘着テープの場合、被着体に粘着剤残りが認められる
ことが多く、その解決を図る為の材料・プロセスの開発
が強く望まれていた。Particularly, in the case of an adhesive tape which is peeled off from an adherend by heating and foaming, an adhesive residue often remains on the adherend, and the development of materials and processes for solving the problem has been strongly desired. .
【００１４】本発明の目的は、上記した従来材料、技術
の有していた課題を解決して、初期粘着力や保持力等の
粘着基本特性が良好で、かつ、貼着後、剥離したい時に
簡単に被着体より剥がすことができる加熱剥離型粘着テ
ープ・シート及びその製造方法を提供することにある。An object of the present invention is to solve the problems of the above-mentioned conventional materials and techniques, to provide good basic adhesive properties such as initial adhesive strength and holding power, and to peel off after application. An object of the present invention is to provide a heat-peelable pressure-sensitive adhesive tape / sheet which can be easily peeled off from an adherend and a method for producing the same.
【００１５】[0015]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、特許請求の範囲に記載した構成とする
ものである。Means for Solving the Problems In order to achieve the above object, the present invention is configured as described in the claims.
【００１６】すなわち、基材の片面又は両面に、活性官
能基を有するアクリル系粘着高分子量体と、熱架橋剤
と、有機溶剤と、発泡剤粒子とを主成分とする粘着剤を
用いて粘着剤層を形成した加熱剥離型粘着テープ・シー
トにおいて、上記活性官能基を有するアクリル系粘着高
分子量体をラジカル活性種と反応して架橋する官能基を
有するアクリル系粘着高分子量体とし、かつ、上記発泡
剤粒子を加熱により窒素ガスを放出すると同時にラジカ
ル活性種を発生する化合物とする。That is, one side or both sides of a base material is adhered by using an adhesive mainly composed of an acrylic adhesive high molecular weight material having an active functional group, a thermal crosslinking agent, an organic solvent, and foaming agent particles. In the heat-peelable pressure-sensitive adhesive tape / sheet on which the agent layer is formed, the acrylic pressure-sensitive adhesive high molecular weight material having the active functional group is converted to an acrylic pressure-sensitive adhesive high molecular weight material having a functional group capable of crosslinking by reacting with a radical active species, and The blowing agent particles are compounds that release nitrogen gas by heating and generate radical active species at the same time.
【００１７】また、上記した加熱剥離型粘着テープ・シ
ートにおいて、活性官能基を有するアクリル系粘着高分
子量体の重量平均分子量を１０万〜２００万、活性官能
基の含有量を０．０１〜２．０ミリ当量／ｇ、かつ、水
酸基価を１０〜１００ｍｇＫＯＨ／ｇとする。In the above-mentioned heat-peelable pressure-sensitive adhesive tape / sheet, the weight average molecular weight of the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group is from 100,000 to 2,000,000, and the content of the active functional group is from 0.01 to 2,000,000. 0.0 meq / g and a hydroxyl value of 10 to 100 mgKOH / g.
【００１８】また、上記した加熱剥離型粘着テープ・シ
ートにおいて、基材の片面又は両面に、発泡剤粒子を含
まないアクリル系粘着剤を用いて粘着剤下層を形成し、
その上に上記した発泡剤粒子を含む粘着剤を用いて粘着
剤上層を形成し、２層構造の粘着剤層とする。Further, in the above-mentioned heat-peelable pressure-sensitive adhesive tape / sheet, a pressure-sensitive adhesive lower layer is formed on one or both surfaces of the base material using an acrylic pressure-sensitive adhesive containing no foaming agent particles;
A pressure-sensitive adhesive upper layer is formed thereon using the pressure-sensitive adhesive containing the foaming agent particles to form a pressure-sensitive adhesive layer having a two-layer structure.
【００１９】加熱剥離型粘着テープ・シートの製造方法
において、基材の片面又は両面に上記した発泡剤粒子を
含む粘着剤を塗工、乾燥し、粘着剤層を５〜５００μｍ
厚に形成する。In the method for producing a heat-peelable pressure-sensitive adhesive tape / sheet, a pressure-sensitive adhesive containing the above-mentioned foaming agent particles is applied to one or both surfaces of a substrate and dried to form a pressure-sensitive adhesive layer having a thickness of 5 to 500 μm.
It is formed thick.
【００２０】また、加熱剥離型粘着テープ・シートの製
造方法において、基材の片面又は両面に発泡剤粒子を含
まない粘着剤を塗工、乾燥し、粘着剤下層を５〜２００
μｍ厚に形成し、その上に上記した発泡剤粒子を含む粘
着剤を塗工、乾燥し、粘着剤上層を５〜５００μｍ厚に
形成する。In the method for producing a heat-peelable pressure-sensitive adhesive tape / sheet, a pressure-sensitive adhesive containing no foaming agent particles is applied to one or both surfaces of the substrate and dried to form a pressure-sensitive adhesive lower layer of 5-200.
A pressure-sensitive adhesive containing the above-mentioned foaming agent particles is applied thereon and dried to form a pressure-sensitive adhesive upper layer having a thickness of 5 to 500 μm.
【発明の実施の形態】本発明者らは、上記目的を達成す
る為に、加熱剥離型粘着テープ・シートを製造する為の
材料・プロセスを種々検討した結果、シート基材の片面
又は両面に、活性官能基を有するアクリル系粘着高分子
量体と、熱架橋剤と、有機溶剤と、発泡剤粒子とからな
る粘着剤溶液また分散液を用いて作製した粘着テープ・
シートが、粘着力、保持力等の粘着基本特性が良好で、
かつ、貼着後、剥離したい時に簡単に被着体より剥がす
ことができる加熱剥離型粘着テープ・シートになること
を確認した。BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have studied various materials and processes for producing a heat-peelable pressure-sensitive adhesive tape / sheet in order to achieve the above object. An adhesive tape prepared using an adhesive solution or dispersion comprising an acrylic adhesive high molecular weight material having an active functional group, a thermal crosslinking agent, an organic solvent, and blowing agent particles.
The sheet has good adhesive basic properties such as adhesive strength and holding power,
In addition, it was confirmed that the heat-peelable pressure-sensitive adhesive tape / sheet can be easily peeled off from the adherend when it is desired to peel it off after sticking.
【００２１】このような材料・プロセスにより作製する
ことにより、初期粘着特性に優れ、かつ、後加熱により
被着体に粘着剤残りなく、簡単に被着体より剥がすこと
ができる加熱剥離型粘着テープ・シートになることを確
認した。A heat-peelable pressure-sensitive adhesive tape which is excellent in initial pressure-sensitive properties and which can be easily peeled off from an adherend by post-heating without being left on the adherend by being produced by such a material / process.・ Confirmed that it will be a sheet.
【００２２】特に、本発明で使用される活性官能基を有
するアクリル系粘着高分子量体は、ラジカル反応により
架橋する官能基をポリマー側鎖等に有するものであり、
加熱により剥離する際に、架橋反応を起こすことによ
り、粘着剤の凝集力が上昇し、被着体より剥離する時
に、被着体に粘着剤残りが生じないことを確認した。In particular, the acrylic adhesive high molecular weight material having an active functional group used in the present invention has a functional group which is crosslinked by a radical reaction in a polymer side chain or the like.
It was confirmed that a cohesive force of the pressure-sensitive adhesive was increased by causing a crosslinking reaction when peeled off by heating, and that no pressure-sensitive adhesive residue was left on the adherend when peeled from the adherend.
【００２３】また、本発明で使用される発泡剤粒子とし
ては、加熱時に窒素ガスを発生させると同時に、ラジカ
ル活性種を発生させる化合物が良いことを見出した。こ
れにより、発泡剤粒子より発生したラジカル活性種と粘
着剤中の活性官能基を有するアクリル系粘着高分子量体
が架橋反応を起こし、粘着剤の凝集力が上昇し、被着体
より剥離し易くなるとともに、被着体に粘着剤残りが生
じなくなることを確認した。併せて、加熱により発泡剤
粒子より発生する窒素ガスが粘着テープと被着体界面に
集まることにより剥離できるようになることも確認し
た。Further, it has been found that as the blowing agent particles used in the present invention, a compound which generates a nitrogen gas at the time of heating and simultaneously generates a radical active species is preferable. As a result, the radical active species generated from the foaming agent particles and the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group in the pressure-sensitive adhesive cause a cross-linking reaction, the cohesive force of the pressure-sensitive adhesive increases, and the pressure-sensitive adhesive is easily separated from the adherend. It was confirmed that no adhesive residue remained on the adherend. In addition, it was confirmed that nitrogen gas generated from the foaming agent particles by heating gathered at the interface between the pressure-sensitive adhesive tape and the adherend so that it could be peeled off.
【００２４】また、シート基材上に直接発泡剤粒子を含
有する加熱剥離型粘着剤層を塗工しないで、発泡剤粒子
を含まない粘着剤下層を形成し、その上に発泡剤粒子を
含有する粘着剤上層を形成し、粘着剤下層と粘着剤上層
とからなる２層構造とすることも良いことを見出した。Further, without applying a heat-peelable pressure-sensitive adhesive layer containing foaming agent particles directly on the sheet substrate, a pressure-sensitive adhesive lower layer containing no foaming agent particles is formed, and foaming agent particles are contained thereon. It has been found that it is also possible to form a pressure-sensitive adhesive upper layer to form a two-layer structure composed of a pressure-sensitive adhesive lower layer and a pressure-sensitive adhesive upper layer.
【００２５】すなわち、本発明の発泡剤粒子を含む粘着
剤層からなる加熱剥離型粘着テープ・シート、あるい
は、発泡剤粒子を含まない粘着剤下層の上に発泡剤粒子
を含む粘着剤上層を形成した２層構造からなる加熱剥離
型粘着テープ・シートを用いることにより、初期粘着力
や保持力等の粘着基本特性に優れ、かつ、貼着後の任意
な時に加熱処理により被着体より簡単に剥離できる加熱
剥離型粘着テープ・シートを得ることができる。That is, a heat-peelable pressure-sensitive adhesive tape / sheet comprising a pressure-sensitive adhesive layer containing blowing agent particles of the present invention, or a pressure-sensitive adhesive upper layer containing blowing agent particles is formed on a pressure-sensitive adhesive lower layer containing no blowing agent particles. By using the heat-peelable pressure-sensitive adhesive tape / sheet composed of the two-layer structure, it is excellent in basic adhesive properties such as initial adhesive strength and holding power, and more easily than the adherend by heat treatment at any time after application. A heat-peelable pressure-sensitive adhesive tape / sheet that can be peeled can be obtained.
【００２６】本発明の加熱剥離型粘着テープ・シート
は、各種基材への初期粘着性に優れており、各種基板の
加工時の仮固定用などに使用できる。The heat-peelable pressure-sensitive adhesive tape / sheet of the present invention has excellent initial adhesion to various substrates and can be used for temporary fixing during processing of various substrates.
【００２７】以下、本発明の加熱剥離型粘着テープ・シ
ート及びその製造方法について説明する。Hereinafter, the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention and a method for producing the same will be described.
【００２８】本発明で使用される活性官能基を有するア
クリル系粘着高分子量体は、粘着テープ・シートの加熱
剥離時の易剥離性を付与するために使用されるととも
に、初期粘着特性、及び塗工性などの作業性などを向上
させるためにも使用される。The acrylic adhesive high molecular weight material having an active functional group used in the present invention is used for imparting easy peelability at the time of heat peeling of the pressure-sensitive adhesive tape / sheet, and has an initial adhesive property and a coating property. It is also used to improve workability such as workability.
【００２９】本発明で使用される活性官能基を有するア
クリル系粘着高分子量体としては、重量平均分子量が１
０万〜２００万であり、活性官能基含有量が０．０１〜
２．０ミリ当量／ｇであり、かつ、水酸基価が１０〜１
００ｍｇＫＯＨ／ｇであるものが好ましい。The acrylic adhesive high molecular weight material having an active functional group used in the present invention has a weight average molecular weight of 1
100,000 to 2,000,000, and the active functional group content is 0.01 to
2.0 meq / g and a hydroxyl value of 10 to 1
It is preferably 00 mgKOH / g.
【００３０】上記活性官能基をアクリル系粘着高分子量
体に導入する方法としては、通常、アクリル系高分子量
体の側鎖にあるヒドロキシル基を（メタ）アクリロイル
オキシ基を有するイソシアネート化合物（例えば、２−
メタクリロイルオキシエチルイソシアネートなど）と反
応させる方法などがある。このようにして、（メタ）ア
クリロイルオキシ基などの活性官能基を有するアクリル
系粘着高分子量体を得ることができる。しかし、その導
入方法は、特に限定されるものではない。このアクリル
系粘着高分子量体は、有機溶剤などに溶解して使用され
る。As a method for introducing the active functional group into the acrylic pressure-sensitive adhesive high molecular weight product, an isocyanate compound having a (meth) acryloyloxy group having a hydroxyl group on the side chain of the acrylic high molecular weight product (for example, 2 −
Methacryloyloxyethyl isocyanate). Thus, an acrylic adhesive high molecular weight material having an active functional group such as a (meth) acryloyloxy group can be obtained. However, the introduction method is not particularly limited. This acrylic adhesive high molecular weight material is used after being dissolved in an organic solvent or the like.
【００３１】上記活性官能基を有するアクリル系粘着高
分子量体の重量平均分子量が１０万より小さい場合に
は、初期粘着特性が十分でなく、重量平均分子量が２０
０万より大きい場合には、粘着テープの特性上、特に問
題はないが、アクリル系粘着高分子量体を量産的に製造
することが難しく、いずれの場合も好ましくない。When the weight average molecular weight of the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group is less than 100,000, the initial pressure-sensitive adhesive properties are not sufficient, and the weight-average molecular weight is 20%.
When it is larger than 0,000, there is no particular problem in the properties of the pressure-sensitive adhesive tape, but it is difficult to mass-produce the acrylic pressure-sensitive adhesive high molecular weight material, and any case is not preferable.
【００３２】また、上記活性官能基を有するアクリル系
粘着高分子量体の活性官能基含有量が０．０１ミリ当量
／ｇより小さい場合には、加熱時のラジカル架橋反応が
十分に起こらず、その結果、易剥離性を付与することが
難しくなり、また、活性官能基含有量が２．０ミリ当量
／ｇより大きい場合には、アクリル系高分子量体を量産
的に製造することが難しく、好ましくない。When the content of the active functional group of the acrylic pressure-sensitive adhesive polymer having an active functional group is less than 0.01 meq / g, the radical crosslinking reaction does not sufficiently occur during heating. As a result, it becomes difficult to impart easy peelability, and when the content of the active functional group is more than 2.0 meq / g, it is difficult to mass-produce an acrylic high molecular weight substance, and it is preferable. Absent.
【００３３】また、上記活性官能基を有するアクリル系
粘着高分子量体の水酸基価が１０ｍｇＫＯＨ／ｇより小
さい場合には、熱架橋剤との反応が十分でない為に、初
期粘着性が十分でなく、また、水酸基価が１００ｍｇＫ
ＯＨ／ｇより大きい場合にも、初期粘着性を十分に発現
することが難しく、いずれの場合にも実用上好ましくな
い。If the acrylic polymer having an active functional group has a hydroxyl value of less than 10 mg KOH / g, the initial tackiness is not sufficient due to insufficient reaction with the thermal crosslinking agent. In addition, the hydroxyl value is 100 mgK
Even if it is larger than OH / g, it is difficult to sufficiently develop the initial tackiness, and in any case, it is not practically preferable.
【００３４】なお、上記活性官能基を有するアクリル系
粘着高分子量体の主成分は、通常、（メタ）アクリル酸
アルキルエステル単量体と極性基含有単量体との共重合
体、例えば、アクリル酸２−エチルヘキシルとアクリル
酸との共重合体、アクリル酸イソオクチルとメタクリル
酸２−ヒドロキシエチルとの共重合体、アクリル酸２−
エチルヘキシルとアクリル酸とメタクリル酸２−ヒドロ
キシエチルとの三元共重合体等が使用されるが、特にこ
れらに限定されるものではない。The main component of the acrylic adhesive polymer having an active functional group is usually a copolymer of a (meth) acrylic acid alkyl ester monomer and a polar group-containing monomer, for example, an acrylic A copolymer of 2-ethylhexyl acrylate and acrylic acid, a copolymer of isooctyl acrylate and 2-hydroxyethyl methacrylate,
Tertiary copolymers of ethylhexyl, acrylic acid and 2-hydroxyethyl methacrylate are used, but are not particularly limited thereto.
【００３５】上記した（メタ）アクリル酸アルキルエス
テル単量体としては、例えば、エチル基、プロピル基、
ブチル基、ペンチル基、ヘキシル基、２−エチルヘキシ
ル基、オクチル基、イソオクチル基、ノニル基、イソノ
ニル基、デシル基などで代表される通常、炭素数が２０
以下のアルキル基を有する（メタ）アクリル酸のエステ
ル等が挙げられる。なお、上記した（メタ）アクリル酸
アルキルエステルは、単独もしくは２種以上で使用され
る。The above-mentioned alkyl (meth) acrylate monomers include, for example, ethyl group, propyl group,
A butyl group, pentyl group, hexyl group, 2-ethylhexyl group, octyl group, isooctyl group, nonyl group, isononyl group, decyl group, etc.
Examples of (meth) acrylic acid esters having the following alkyl groups include: The above-mentioned alkyl (meth) acrylate is used alone or in combination of two or more.
【００３６】また、上記した極性基含有単量体として
は、アクリル酸、メタクリル酸、イタコン酸、メタクリ
ル酸２−ヒドロキシエチル、メタクリル酸２−ヒドロキ
シプロピル、アクリル酸ジメチルアミノエチル、アクリ
ロニトリル、メタクリロニトリル、Ｎ−ビニル−２−ピ
ロリドン等で代表される、分子中にカルボキシル基、水
酸基、アミノ基等の極性基を有する重合性不飽和単量体
等が挙げられる。The above polar group-containing monomers include acrylic acid, methacrylic acid, itaconic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl acrylate, acrylonitrile, methacrylonitrile , N-vinyl-2-pyrrolidone and the like, and a polymerizable unsaturated monomer having a polar group such as a carboxyl group, a hydroxyl group and an amino group in the molecule.
【００３７】上記した活性官能基を有するアクリル系粘
着高分子量体からなる粘着剤を基材上に塗工する際に
は、上記活性官能基を有するアクリル系粘着高分子量体
を酢酸エチル、トルエン等の有機溶剤に溶解させて使用
することが良い。When applying the above-mentioned pressure-sensitive adhesive comprising the acrylic pressure-sensitive adhesive polymer having an active functional group on a substrate, the acrylic pressure-sensitive adhesive polymer having an active functional group is treated with ethyl acetate, toluene or the like. It is preferable to use it after dissolving it in an organic solvent.
【００３８】本発明で使用される発泡剤粒子としては、
加熱により窒素ガス等を発生させる化合物が好ましく、
特に、窒素ガスと同時にラジカル活性種を発生させる化
合物が好ましく、２，２’−アゾビスイソブチロニトリ
ル等の有機系のアゾ系化合物等が挙げられる。このよう
な発泡剤粒子の例としては、１，１’−アゾビス（１−
アセトキシ−１−フェニルエタン）、アゾジカルボンア
ミド等のアゾ系化合物、トリクロロモノフルオロメタ
ン、ジクロロモノフルオロメタン等のフッ化アルカン化
合物、パラトルエンスルフォニルヒドラジド、ジフェニ
ルスルフォン−３，３’−ジスルフォニルヒドラジド、
アリルビススルフォニルヒドラジド等のヒドラジン系化
合物、ｏ−トルイレンスルフォニルセミカルバジド等の
セミカルバジド系化合物、Ｎ，Ｎ’−ジニトロソペンタ
メチレンテトラミン等のＮ−ニトロソ系化合物等が挙げ
られる。The foaming agent particles used in the present invention include:
Compounds that generate nitrogen gas or the like by heating are preferable,
In particular, a compound that generates a radical active species simultaneously with nitrogen gas is preferable, and examples thereof include organic azo compounds such as 2,2′-azobisisobutyronitrile. Examples of such blowing agent particles include 1,1′-azobis (1-
Azo compounds such as acetoxy-1-phenylethane) and azodicarbonamide; fluorinated alkane compounds such as trichloromonofluoromethane and dichloromonofluoromethane; paratoluenesulfonylhydrazide; diphenylsulfone-3,3′-disulfonylhydrazide;
Examples include hydrazine compounds such as allylbissulfonyl hydrazide, semicarbazide compounds such as o-toluylenesulfonyl semicarbazide, and N-nitroso compounds such as N, N'-dinitrosopentamethylenetetramine.
【００３９】本発明で使用されるこれらの発泡剤粒子の
粒径は、通常、０．１〜５０μｍのものが使用され、そ
の添加量は粘着剤１００重量部に対して０．５〜１０重
量部で使用されることが望ましい。発泡剤粒子の添加量
が０．５重量部より少ない場合には、加熱後の剥離性が
十分ではなく、また、その添加量が１０重量部より多い
場合には、初期粘着特性が十分ではなく、いずれの場合
にも実用上好ましくない。The particle diameter of these foaming agent particles used in the present invention is usually from 0.1 to 50 μm, and the amount of addition is from 0.5 to 10 parts by weight based on 100 parts by weight of the adhesive. It is desirable to use it in the department. When the added amount of the foaming agent particles is less than 0.5 parts by weight, the releasability after heating is not sufficient, and when the added amount is more than 10 parts by weight, the initial adhesive properties are not sufficient. In any case, it is not practically preferable.
【００４０】また、上記活性官能基を有するアクリル系
粘着高分子量体からなる粘着剤に使用される熱架橋剤と
しては、一般にアクリル系粘着剤の架橋剤として使用さ
れるイソシアネート化合物系架橋剤、エポキシ化合物系
架橋剤、アルミキレート化合物系架橋剤等が使用され
る。The thermal cross-linking agent used for the pressure-sensitive adhesive comprising the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group includes an isocyanate compound-based cross-linking agent generally used as a cross-linking agent for an acrylic pressure-sensitive adhesive. A compound-based crosslinking agent, an aluminum chelate compound-based crosslinking agent, and the like are used.
【００４１】例えば、綜研化学社より販売されているポ
リイソシアネート架橋剤（商品名：Ｌ−４５など）、エ
ポキシ化合物系架橋剤（商品名：Ｅ−ＡＸなど）、アル
ミキレート化合物系架橋剤（商品名：Ｍ−５Ａなど）等
が使用できるが、ここに挙げたものに限定されるもので
はない。For example, polyisocyanate cross-linking agents (trade name: L-45, etc.), epoxy compound cross-linking agents (trade name: E-AX, etc.), aluminum chelate compound cross-linking agents (trade name, sold by Soken Chemical Co., Ltd.) Name: M-5A) can be used, but the present invention is not limited to those listed here.
【００４２】これらの熱架橋剤は、上記活性官能基を有
するアクリル系高分子量体１００重量部に対して、０．
０１〜１０重量部の割合で使用されるのが好ましい。そ
の使用量が０．０１重量部より少なかったり、１０重量
部より多かったりすると、いずれも十分な粘着特性が得
られず、好ましくない。These thermal crosslinking agents are used in an amount of 0.1 part by weight based on 100 parts by weight of the acrylic high molecular compound having an active functional group.
It is preferably used in a proportion of from 01 to 10 parts by weight. If the amount is less than 0.01 part by weight or more than 10 parts by weight, sufficient adhesive properties cannot be obtained in any case, which is not preferable.
【００４３】本発明の加熱剥離型粘着テープ・シートを
作製する粘着剤に、通常、アクリル樹脂などに使用され
るロジン系樹脂、テルペン系樹脂、石油樹脂等の粘着性
付与剤を添加しても良い。The pressure-sensitive adhesive for producing the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention may contain a tackifier such as a rosin-based resin, a terpene-based resin, or a petroleum resin, which is usually used for an acrylic resin. good.
【００４４】更に、本発明の粘着剤には、増粘剤、チキ
ソトロピー剤、充填剤等の通常使用される配合剤を添加
しても良い。上記増粘剤としては、アクリルゴム、エピ
クロルヒドリンゴム等が挙げられ、上記チキソトロピー
剤としては、超微粉シリカ（日本アエロジル社製のアエ
ロジル３００など）等が挙げられる。上記充填剤として
は、炭酸カルシウム、二酸化チタン、二酸化ケイ素、α
ーアルミナ、水和アルミナ等の無機粒子、ナイロンビー
ズ、アクリルビーズ、シリコーンビーズ等の有機粒子、
塩化ビニリデンバルーン等の有機中空粒子、ポリエステ
ル、ナイロン、レーヨン、ガラス等の有機又は無機系短
繊維等が挙げられる。これらは、粘着テープ・シートの
応力緩和性などの機械的特性等を改善する為に加えら
れ、光硬化性を阻害しない範囲で使用される。Further, the pressure-sensitive adhesive of the present invention may contain commonly used compounding agents such as a thickener, a thixotropic agent and a filler. Examples of the thickener include acrylic rubber, epichlorohydrin rubber, and the like, and examples of the thixotropic agent include ultrafine silica (such as Aerosil 300 manufactured by Nippon Aerosil Co., Ltd.). As the filler, calcium carbonate, titanium dioxide, silicon dioxide, α
-Inorganic particles such as alumina and hydrated alumina, organic particles such as nylon beads, acrylic beads, silicone beads,
Organic hollow particles such as vinylidene chloride balloons; organic or inorganic short fibers such as polyester, nylon, rayon, and glass; These are added to improve mechanical properties such as stress relaxation of the pressure-sensitive adhesive tape / sheet, and are used within a range that does not impair photocurability.
【００４５】本発明の粘着剤は液状であり、ロールコー
ターやダイコーターなどにより不織布、ポリエステルフ
ィルム等のシート基材上に塗工され、加熱乾燥して、５
〜５００μｍ厚に粘着剤層が形成されることが好まし
い。この場合、上記粘着剤層の厚さが、５μｍよりも小
さいと、加熱後に十分な粘着力低下が認められず、ま
た、上記粘着剤層の厚さが、５００μｍよりも大きい
と、特性上、特に問題はないが、粘着テープの作製プロ
セス上、好ましくない。The pressure-sensitive adhesive of the present invention is in a liquid form, is coated on a sheet substrate such as a nonwoven fabric or a polyester film by a roll coater or a die coater, and is dried by heating.
It is preferable that the pressure-sensitive adhesive layer be formed to a thickness of 500 μm. In this case, if the thickness of the pressure-sensitive adhesive layer is smaller than 5 μm, a sufficient decrease in adhesive strength after heating is not observed, and if the thickness of the pressure-sensitive adhesive layer is larger than 500 μm, Although there is no particular problem, it is not preferable in the production process of the adhesive tape.
【００４６】本発明の粘着テープに使用される基材に
は、ポリエステルフィルム等のプラスチックフィルム、
織布、不織布、紙、金属箔、発泡シートなどが使用さ
れ、基材の厚さは５〜５００μｍであることが好まし
い。The substrate used for the pressure-sensitive adhesive tape of the present invention includes a plastic film such as a polyester film,
Woven fabrics, nonwoven fabrics, papers, metal foils, foam sheets and the like are used, and the thickness of the substrate is preferably 5 to 500 μm.
【００４７】本発明の加熱剥離型粘着テープ・シートを
作製する場合、発泡剤粒子を含む粘着剤を直接上記した
基材の片面あるいは両面に塗工しても良いし、あるい
は、発泡剤粒子を含む粘着剤を上記した基材の片面ある
いは両面に直接塗工するのではなく、まず、上記した基
材上に発泡剤粒子を含まない粘着剤を５〜２００μｍ厚
に塗工して、粘着剤下層を形成し、その上に発泡剤粒子
を含む粘着剤を５〜５００μｍ厚に塗工し、粘着剤上層
を形成して、２層構造の粘着剤層としても差し支えな
い。そうすることにより、上記２層構造の粘着剤層の基
材に対する密着性が向上する。この場合、上記粘着剤下
層の厚さが５μｍより小さかったり、２００μｍよりも
大きかったりすると、特性上、特に問題はないが、粘着
テープの作製プロセス上、好ましくない。When preparing the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention, a pressure-sensitive adhesive containing foaming agent particles may be applied directly to one or both sides of the above-mentioned base material, or the foaming agent particles may be applied. Instead of directly applying the adhesive containing one or both sides of the above-mentioned base material, first, apply an adhesive containing no foaming agent particles to the above-mentioned base material to a thickness of 5 to 200 μm, The lower layer is formed, and the pressure-sensitive adhesive containing the foaming agent particles is applied thereon to a thickness of 5 to 500 μm to form the upper layer of the pressure-sensitive adhesive. By doing so, the adhesion of the pressure-sensitive adhesive layer having the two-layer structure to the base material is improved. In this case, if the thickness of the pressure-sensitive adhesive lower layer is smaller than 5 μm or larger than 200 μm, there is no particular problem in characteristics, but it is not preferable in the process of producing the pressure-sensitive adhesive tape.
【００４８】以下に、本発明の加熱剥離型粘着テープ・
シート及びその製造方法を具体的に説明する。但し、本
発明の加熱剥離型粘着テープ・シートはこの方法によっ
て製造されるものに限定される訳ではない。The heat-peelable pressure-sensitive adhesive tape of the present invention
The sheet and its manufacturing method will be specifically described. However, the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention is not limited to those manufactured by this method.
【００４９】まず、上記活性官能基を有するアクリル系
粘着高分子量体、上記熱架橋剤及び有機溶剤を所定の配
合量で混合し、これに発泡剤粒子を所定量添加し、十分
に攪拌、混合し、粘着剤を得る。First, the acrylic pressure-sensitive adhesive polymer having an active functional group, the thermal crosslinking agent and the organic solvent are mixed in a predetermined amount, and a predetermined amount of foaming agent particles are added thereto. To obtain an adhesive.
【００５０】このように作製した粘着剤をロールコータ
ーやダイコーターなどにより不織布、ポリエステルフィ
ルム等のシート基材上に塗工した後、４０〜１００℃で
加熱乾燥して、５〜５００μｍ厚の加熱剥離型粘着テー
プ・シートが得ることが好ましい。The thus prepared pressure-sensitive adhesive is coated on a sheet substrate such as a nonwoven fabric or a polyester film by a roll coater or a die coater, and then dried by heating at 40 to 100 ° C. It is preferable to obtain a peelable pressure-sensitive adhesive tape / sheet.
【００５１】発泡剤粒子を含まない粘着剤下層と発泡剤
粒子を含む粘着剤上層との２層構造からなる加熱剥離型
粘着テープ・シートを得る場合には、まず、基材上に発
泡剤粒子を含まない粘着剤下層を５〜２００μｍ厚に形
成し、その上に発泡剤粒子を含む粘着剤上層を形成し、
上記した方法と同様にして得られる。In order to obtain a heat-peelable pressure-sensitive adhesive tape sheet having a two-layer structure of a pressure-sensitive adhesive lower layer containing no foaming agent particles and a pressure-sensitive adhesive upper layer containing foaming agent particles, first, foaming agent particles are first placed on a substrate. To form a pressure-sensitive adhesive lower layer having a thickness of 5 to 200 μm and a pressure-sensitive adhesive upper layer containing foaming agent particles formed thereon,
It is obtained in the same manner as described above.
【００５２】本発明の加熱剥離型粘着テープ・シートは
このようにして得られ、本発明の粘着テープ・シートを
電気・電子部品等の被着体に貼り合わせた場合、優れた
初期粘着性と、加熱時の易剥離性を示す。The heat-peelable pressure-sensitive adhesive tape / sheet of the present invention is obtained in this manner, and when the pressure-sensitive adhesive tape / sheet of the present invention is bonded to an adherend such as an electric or electronic component, excellent initial tackiness and excellent adhesiveness can be obtained. And easy peelability upon heating.
【００５３】[0053]
【実施例】本発明の加熱剥離型粘着テープ・シート及び
その製造方法について、実施例によって具体的に説明す
る。但し、本発明の加熱剥離型粘着テープ・シート及び
その製造方法はこれに限定されるものではない。なお、
実施例及び具体例の記述中における「部」は重量部を表
す。 ［実施例１］重量平均分子量が８０万、活性官能基含有
量が０．５９ミリ当量／ｇ、水酸基価が５６ｍｇＫＯＨ
／ｇであるアクリル酸２−エチルヘキシルを主成分とす
るアクリル系粘着高分子量体を酢酸エチルに溶解させた
固形分３０重量％の粘着剤１００部に、ポリイソシアネ
ート系熱架橋剤Ｌ−４５（綜研化学社製）０．１部及び
発泡剤粒子１，１’−アゾビス（１−アセトキシ−１−
フェニルエタン）１部を添加し、十分に混合し、発泡剤
粒子を含む粘着剤を得た。EXAMPLES The heat-peelable pressure-sensitive adhesive tape / sheet of the present invention and the method for producing the same will be specifically described with reference to examples. However, the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention and the method for producing the same are not limited thereto. In addition,
“Parts” in the description of Examples and Specific Examples represent parts by weight. Example 1 Weight average molecular weight: 800,000, active functional group content: 0.59 meq / g, hydroxyl value: 56 mg KOH
/ G of 2-ethylhexyl acrylate as a main component was dissolved in ethyl acetate and 100 parts of an adhesive having a solid content of 30% by weight, and a polyisocyanate-based thermal crosslinking agent L-45 (Soken) 0.1 part of foaming agent particles and 1,1′-azobis (1-acetoxy-1-)
1 part of phenylethane) and mixed well to obtain a pressure-sensitive adhesive containing foaming agent particles.
【００５４】この粘着剤をコロナ剥離処理が施された５
０μｍ厚のポリエステルフィルム上にコンマコーターに
より５０μｍ厚に塗工して、６０℃で１０分間で加熱乾
燥し、１００μｍ厚の加熱剥離型粘着テープ・シートを
得た。なお、この加熱剥離型粘着テープ・シートを室温
で１週間放置し、エージングさせた。The adhesive was subjected to corona peeling treatment 5
It was coated on a polyester film having a thickness of 0 μm to a thickness of 50 μm with a comma coater and dried by heating at 60 ° C. for 10 minutes to obtain a heat-peelable pressure-sensitive adhesive tape sheet having a thickness of 100 μm. The heat-peelable pressure-sensitive adhesive tape / sheet was left at room temperature for one week to be aged.
【００５５】続いて、この加熱剥離型粘着テープ・シー
トのステンレス板に対する初期粘着力（１８０°ピール
力）を測定したところ、２．７Ｎ／１０ｍｍであり、ま
た、４０℃／２４時間放置（荷重：１ｋｇ）保持力試験
において、ずれや落下は認められず、良好な粘着特性を
示した。なお、この加熱剥離型粘着テープ・シートのボ
ールタック（角度：３０°）は３以下であった。Subsequently, the initial adhesive force (180 ° peel force) of the heat-peelable pressure-sensitive adhesive tape / sheet to the stainless steel plate was measured, and was 2.7 N / 10 mm. : 1 kg) In the holding force test, no slippage or drop was observed, and good adhesive properties were exhibited. The heat-peelable pressure-sensitive adhesive tape / sheet had a ball tack (angle: 30 °) of 3 or less.
【００５６】この加熱剥離型粘着テープ・シートをステ
ンレス板及びシリコンウェハに貼り合わせた後、上記ス
テンレス板及びシリコンウェハを１２０℃で６０秒間、
熱板で加熱し、上記ステンレス板及びシリコンウェハに
対する上記加熱剥離型粘着テープ・シートの粘着力を測
定したところ、それぞれ、０．２Ｎ／２５ｍｍ、０．１
５Ｎ／２５ｍｍであり、容易に被着体より剥離すること
ができた。After bonding the heat-peelable pressure-sensitive adhesive tape / sheet to a stainless steel plate and a silicon wafer, the stainless steel plate and the silicon wafer are bonded at 120 ° C. for 60 seconds.
When heated with a hot plate, the adhesive strength of the heat-peelable pressure-sensitive adhesive tape / sheet to the stainless steel plate and the silicon wafer was measured.
It was 5 N / 25 mm and could be easily peeled from the adherend.
【００５７】また、剥離後の被着体表面をデジタルマイ
クロスコープＶＨ−６２００（キーエンス社製）により
観察したところ、被着体面には粘着剤残りが認められ
ず、優れた加熱剥離性を示していることを確認した。When the surface of the adherend after peeling was observed with a digital microscope VH-6200 (manufactured by KEYENCE CORPORATION), no adhesive residue was observed on the adherend surface, showing excellent heat peelability. I confirmed that.
【００５８】以上のように、本発明の加熱剥離型粘着テ
ープ・シートは、良好な初期粘着性と加熱後の易剥離性
を兼ね備えており、加熱剥離型粘着テープ・シートとし
ての機能を兼ね備えていることを確認した。 ［実施例２］重量平均分子量が８０万、活性官能基含有
量が０．５９ミリ当量／ｇ、水酸基価が５６ｍｇＫＯＨ
／ｇであるアクリル酸２−エチルヘキシルを主成分とす
るアクリル系粘着高分子量体の３０重量％の酢酸エチル
溶液１００部に、ポリイソシアネート系熱架橋剤Ｌ−４
５（綜研化学社製）０．１部及び発泡剤粒子２，２’−
アゾビスイソブチロニトリル１部を添加し、十分に混合
し、発泡剤粒子を含む粘着剤を得た。As described above, the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention has both good initial tackiness and easy peelability after heating, and also functions as a heat-peelable pressure-sensitive adhesive tape / sheet. I confirmed that. [Example 2] The weight average molecular weight was 800,000, the content of the active functional group was 0.59 meq / g, and the hydroxyl value was 56 mgKOH.
/ G of 2-ethylhexyl acrylate as a main component, 100 parts of a 30% by weight of an ethyl acetate solution of an acrylic adhesive high molecular weight material, and a polyisocyanate-based thermal crosslinking agent L-4
5 (manufactured by Soken Chemical Co., Ltd.) and blowing agent particles 2, 2'-
One part of azobisisobutyronitrile was added and mixed well to obtain a pressure-sensitive adhesive containing foaming agent particles.
【００５９】また、同様にして、重量平均分子量が８０
万、活性官能基含有量が０．５９ミリ当量／ｇ、水酸基
価が５６ｍｇＫＯＨ／ｇであるアクリル酸２−エチルヘ
キシルを主成分とするアクリル系粘着高分子量体の３０
重量％酢酸エチル溶液１００部に、ポリイソシアネート
系熱架橋剤Ｌ−４５（綜研化学社製）０．１部を添加
し、発泡剤粒子を含まない粘着剤を得た。Similarly, a weight average molecular weight of 80
30, an acrylic adhesive high molecular weight material mainly composed of 2-ethylhexyl acrylate having an active functional group content of 0.59 meq / g and a hydroxyl value of 56 mgKOH / g.
To 100 parts by weight of an ethyl acetate solution, 0.1 part of a polyisocyanate-based thermal crosslinking agent L-45 (manufactured by Soken Chemical Co., Ltd.) was added to obtain an adhesive containing no foaming agent particles.
【００６０】この発泡剤粒子を含まない粘着剤をコロナ
剥離処理が施された５０μｍ厚のポリエステルフィルム
上にコンマコーターにより５０μｍ厚に塗工し、１２０
℃／３分間で加熱乾燥して、粘着剤下層を形成した。そ
の上に、上記した発泡剤粒子を含む粘着剤をコンマコー
ターにより５０μｍ厚に塗工して、６０℃／１０分間で
加熱乾燥し、粘着剤上層を形成し、２層構造からなる１
５０μｍ厚の加熱剥離型片面粘着テープ・シートを得
た。なお、この加熱剥離型粘着テープ・シートを室温で
１週間放置し、エージングさせた。The pressure-sensitive adhesive containing no foaming agent particles was applied on a 50 μm-thick polyester film having been subjected to a corona release treatment to a thickness of 50 μm with a comma coater.
The resultant was dried by heating at a temperature of 3 ° C. for 3 minutes to form an adhesive lower layer. On top of that, the above-mentioned pressure-sensitive adhesive containing the foaming agent particles is applied with a comma coater to a thickness of 50 μm, and dried by heating at 60 ° C./10 minutes to form a pressure-sensitive adhesive upper layer.
A heat-peelable single-sided pressure-sensitive adhesive tape sheet having a thickness of 50 μm was obtained. The heat-peelable pressure-sensitive adhesive tape / sheet was left at room temperature for one week to be aged.
【００６１】この加熱剥離型片面粘着テープ・シートの
ステンレス板に対する初期粘着力（１８０°ピール力）
は、３．５Ｎ／１０ｍｍであり、４０℃／２４時間放置
（荷重：１ｋｇ）保持力試験において、ずれや落下は認
められず、良好な粘着特性を示した。なお、この加熱剥
離型粘着テープ・シートのボールタック（角度：３０
°）は３以下であった。The initial adhesive strength (180 ° peel force) of the heat-peelable single-sided adhesive tape / sheet to the stainless steel plate
Was 3.5 N / 10 mm, and in a holding force test at 40 ° C. for 24 hours (load: 1 kg), no slippage or dropping was observed, showing good adhesive properties. The heat-peelable pressure-sensitive adhesive tape / sheet has a ball tack (angle: 30).
°) was 3 or less.
【００６２】この加熱剥離型片面粘着テープ・シートを
ステンレス板及びシリコンウェハに貼り合わせた後、上
記ステンレス板及びシリコンウェハを１２０℃で６０秒
間、熱板で加熱し、上記ステンレス板及びシリコンウェ
ハに対する上記加熱剥離型片面粘着テープ・シートの粘
着力を測定したところ、それぞれ、０．１５Ｎ／２５ｍ
ｍ、０．１２Ｎ／２５ｍｍであり、容易に被着体より剥
離することができた。また、剥離後の被着体表面をデジ
タルマイクロスコープＶＨ−６２００（キーエンス社
製）により観察したところ、被着体面には粘着剤残りが
認められず、優れた加熱剥離性を示していることを確認
した。After this heat-peelable single-sided adhesive tape / sheet is bonded to a stainless steel plate and a silicon wafer, the stainless steel plate and the silicon wafer are heated at 120 ° C. for 60 seconds with a hot plate, and the stainless steel plate and the silicon wafer are heated. When the adhesive strength of the heat-peelable single-sided adhesive tape / sheet was measured, each was 0.15 N / 25 m.
m, 0.12 N / 25 mm, and could be easily peeled from the adherend. In addition, when the surface of the adherend after peeling was observed with a digital microscope VH-6200 (manufactured by Keyence Corporation), no adhesive residue was observed on the adherend surface, indicating that excellent heat peelability was exhibited. confirmed.
【００６３】以上のように、本発明の加熱剥離型片面粘
着テープ・シートは、良好な初期粘着性と加熱後の易剥
離性を兼ね備えており、加熱剥離型粘着テープ・シート
としての機能を兼ね備えていることを確認した。 ［実施例３］重量平均分子量が８０万、活性官能基含有
量が０．７０ミリ当量／ｇ、水酸基価が１００ｍｇＫＯ
Ｈ／ｇであるアクリル酸２−エチルヘキシルを主成分と
するアクリル系粘着高分子量体の４０重量％酢酸エチル
溶液１００部に、ポリイソシアネート系熱架橋剤０．３
部及び発泡剤粒子１，１’−アゾビス（１−アセトキシ
−１−フェニルエタン）３部を添加し、十分に混合し、
粘着剤を得た。As described above, the heat-peelable single-sided pressure-sensitive adhesive tape / sheet of the present invention has both good initial tackiness and easy peelability after heating, and also functions as a heat-peelable pressure-sensitive adhesive tape / sheet. Confirmed that. [Example 3] The weight average molecular weight was 800,000, the active functional group content was 0.70 meq / g, and the hydroxyl value was 100 mgKO.
100 parts by weight of a 40% by weight ethyl acetate solution of an acrylic adhesive high molecular weight material mainly composed of 2-ethylhexyl acrylate, which is H / g, was added with a polyisocyanate-based thermal crosslinking agent 0.3
Parts and 3 parts of blowing agent particles 1,1′-azobis (1-acetoxy-1-phenylethane) are added and mixed well,
An adhesive was obtained.
【００６４】この粘着剤を１００μｍ厚の不織布基材上
にコンマコーターにより塗工し、８０℃／１０分間で加
熱乾燥し、１００μｍ厚の第１の粘着剤層を形成した。This adhesive was applied on a nonwoven fabric substrate having a thickness of 100 μm by a comma coater and dried by heating at 80 ° C. for 10 minutes to form a first adhesive layer having a thickness of 100 μm.
【００６５】続いて、上記不織布基材の他方の面に、同
様にして、上記した粘着剤をコンマコーターにより塗工
し、１００μｍ厚の第２の粘着剤層を形成した。このよ
うにして、１００μｍ厚の不織布基材の両側に１００μ
ｍ厚の粘着剤層を形成した３００μｍ厚の加熱剥離型両
面粘着テープ・シートを得た。その後、この加熱剥離型
粘着テープ・シートを室温で１週間放置し、エージング
させた。Subsequently, the above-mentioned pressure-sensitive adhesive was similarly applied to the other surface of the nonwoven fabric substrate by a comma coater to form a second pressure-sensitive adhesive layer having a thickness of 100 μm. In this way, 100 μm on each side of a 100 μm thick nonwoven fabric substrate
A heat-peelable double-sided pressure-sensitive adhesive tape sheet having a thickness of 300 μm on which a pressure-sensitive adhesive layer having a thickness of m was formed was obtained. Thereafter, the heat-peelable pressure-sensitive adhesive tape sheet was left at room temperature for one week to be aged.
【００６６】この加熱剥離型両面粘着テープ・シートの
ステンレス板に対する初期粘着力（１８０°ピール力）
は、両面とも３．０Ｎ／１０ｍｍであり、４０℃／２４
時間放置（荷重：１ｋｇ）保持力試験において、ずれや
落下は認められず、良好な粘着特性を示した。なお、こ
の加熱剥離型粘着テープ・シートのボールタック（角
度：３０°）は３以下であった。The initial adhesive force (180 ° peel force) of the heat-peelable double-sided adhesive tape / sheet to the stainless steel plate
Is 3.0 N / 10 mm on both sides, 40 ° C./24
In a holding test for standing for a time (load: 1 kg), no shift or drop was observed, and good adhesive properties were exhibited. The heat-peelable pressure-sensitive adhesive tape / sheet had a ball tack (angle: 30 °) of 3 or less.
【００６７】この加熱剥離型両面粘着テープ・シートを
用いて、ステンレス板とガラス板とを貼り合わせた後、
上記ステンレス板とガラス板を１２０℃で６０秒間、熱
板で加熱したところ、上記加熱剥離型両面粘着テープ・
シートを上記ステンレス板とガラス板から容易に剥離す
ることができた。なお、上記熱剥離型両面粘着テープ・
シートのステンレス板とガラス板に対する加熱後の粘着
力は、それぞれ、０．２Ｎ／２５ｍｍ、０．１５Ｎ／２
５ｍｍであり、初期に比べて１／１０以下に低下してい
ることを確認した。After bonding a stainless steel plate and a glass plate using this heat-peelable double-sided pressure-sensitive adhesive tape / sheet,
When the stainless steel plate and the glass plate were heated with a hot plate at 120 ° C. for 60 seconds, the heat-peelable double-sided adhesive tape was heated.
The sheet could be easily peeled off from the stainless steel plate and the glass plate. The heat-peelable double-sided adhesive tape
The adhesive strength of the sheet to the stainless steel plate and the glass plate after heating was 0.2 N / 25 mm and 0.15 N / 2, respectively.
5 mm, which was confirmed to be 1/10 or less of the initial value.
【００６８】また、剥離後の被着体表面をデジタルマイ
クロスコープＶＨ−６２００（キーエンス社製）により
観察したところ、被着体面には粘着剤残りが認められ
ず、優れた加熱剥離性を示していることを確認した。When the surface of the adherend after peeling was observed with a digital microscope VH-6200 (manufactured by KEYENCE CORPORATION), no adhesive residue was observed on the surface of the adherend, showing excellent heat peelability. I confirmed that.
【００６９】以上のように、本発明の加熱剥離型両面粘
着テープ・シートは、良好な初期粘着特性と加熱後の易
剥離性を兼ね備えており、加熱剥離型粘着テープ・シー
トとしての機能を兼ね備えていることを確認した。 ［実施例４］重量平均分子量が８０万、活性官能基含有
量が０．２０ミリ当量／ｇ、水酸基価が９０ｍｇＫＯＨ
／ｇであるアクリル酸２−エチルヘキシルを主成分とす
るアクリル系粘着高分子量体の３０重量％酢酸エチル溶
液１００部に、ポリイソシアネート系熱架橋剤Ｌ−４５
（綜研化学社製）０．２部及び発泡剤粒子２，２’−ア
ゾビスイソブチロニトリル３部を添加し、十分に混合
し、発泡剤粒子を含む粘着剤を得た。As described above, the heat-peelable double-sided pressure-sensitive adhesive tape / sheet of the present invention has both good initial adhesive properties and easy peelability after heating, and also functions as a heat-peelable pressure-sensitive adhesive tape / sheet. Confirmed that. [Example 4] The weight average molecular weight was 800,000, the active functional group content was 0.20 meq / g, and the hydroxyl value was 90 mgKOH.
/ G of 2-ethylhexyl acrylate as a main component, 100 parts of a 30% by weight ethyl acetate solution of an acrylic pressure-sensitive adhesive high molecular weight material, and a polyisocyanate-based thermal crosslinking agent L-45
0.2 parts (manufactured by Soken Chemical Co., Ltd.) and 3 parts of blowing agent particles 2,2'-azobisisobutyronitrile were added and mixed well to obtain a pressure-sensitive adhesive containing blowing agent particles.
【００７０】また、発泡剤粒子を含まない粘着剤とし
て、汎用のアクリル系粘着剤であるＢ５００Ｓ（綜研化
学社製、固形分４５重量％）溶液１００部に、エポキシ
系熱架橋剤Ｅ−ＡＸ（綜研化学社製）０．３５部を添加
した粘着剤を作製した。As a pressure-sensitive adhesive containing no foaming agent particles, 100 parts of a general-purpose acrylic pressure-sensitive adhesive B500S (manufactured by Soken Chemical Co., Ltd., solid content: 45% by weight) was mixed with an epoxy-based thermal crosslinking agent E-AX ( An adhesive to which 0.35 parts of Soken Chemical Co., Ltd. was added was prepared.
【００７１】この発泡剤粒子を含まない粘着剤を１００
μｍ厚の不織布基材上にコンマコーターにより塗工し、
１２０℃／３分間で加熱乾燥し、３０μｍ厚の第１の粘
着剤下層を得た。その上に、上記した発泡剤粒子を含む
粘着剤をコンマコーター塗工し、５０μｍ厚の第１の粘
着剤上層を得た。このようにして、２層構造からなる加
熱剥離型粘着テープ・シートを得た。The pressure-sensitive adhesive containing no foaming agent particles was added to 100
Coating on a non-woven fabric substrate with a thickness of μm using a comma coater,
It was dried by heating at 120 ° C. for 3 minutes to obtain a first pressure-sensitive adhesive lower layer having a thickness of 30 μm. A pressure-sensitive adhesive containing the above-mentioned foaming agent particles was applied thereon with a comma coater to obtain a first pressure-sensitive adhesive upper layer having a thickness of 50 μm. Thus, a heat-peelable pressure-sensitive adhesive tape sheet having a two-layer structure was obtained.
【００７２】続いて、上記不織布基材のもう１つの面
に、同様にして、上記した発泡剤粒子を含まない粘着剤
層を３０μｍ厚に塗工し、第２の粘着剤下層を形成し、
その上に発泡剤粒子を含む粘着剤を５０μｍ厚に塗工
し、第２の粘着剤上層を形成し、２層構造の粘着剤層を
得た。このようにして、１００μｍ厚の不織布基材の両
側に８０μｍ厚の２層構造から成る粘着剤層を形成した
２６０μｍ厚の加熱剥離型両面粘着テープ・シートを得
た。なお、この加熱剥離型粘着テープ・シートを室温で
１週間放置し、エージングさせた。Subsequently, on the other surface of the nonwoven fabric substrate, a pressure-sensitive adhesive layer containing no foaming agent particles was similarly coated to a thickness of 30 μm to form a second pressure-sensitive adhesive lower layer.
An adhesive containing foaming agent particles was applied thereon to a thickness of 50 μm to form a second upper adhesive layer, thereby obtaining an adhesive layer having a two-layer structure. Thus, a heat-peelable double-sided pressure-sensitive adhesive tape sheet having a thickness of 260 μm, in which a pressure-sensitive adhesive layer having a two-layer structure of 80 μm thickness was formed on both sides of a nonwoven fabric substrate having a thickness of 100 μm. The heat-peelable pressure-sensitive adhesive tape / sheet was left at room temperature for one week to be aged.
【００７３】この加熱剥離型両面粘着テープ・シートの
ステンレス板に対する初期粘着力（１８０°ピール力）
は、両面とも２．８Ｎ／１０ｍｍであり、４０℃／２４
時間放置（荷重：１ｋｇ）保持力試験において、ずれや
落下は認められず、良好な粘着特性を示した。なお、こ
の加熱剥離型粘着テープ・シートのボールタック（角
度：３０°）は３以下であった。The initial adhesive force (180 ° peel force) of the heat-peelable double-sided adhesive tape / sheet to the stainless steel plate
Is 2.8 N / 10 mm on both sides and 40 ° C./24
In a holding test for standing for a time (load: 1 kg), no shift or drop was observed, and good adhesive properties were exhibited. The heat-peelable pressure-sensitive adhesive tape / sheet had a ball tack (angle: 30 °) of 3 or less.
【００７４】この加熱剥離型両面粘着テープ・シートを
用いて、ステンレス製加工盤とガラス板とを貼り合わせ
た。その後、貼り合わせたステンレス製加工盤とガラス
板を１２０℃で６０秒間、熱板で加熱したところ、上記
加熱剥離型両面粘着テープ・シートは、ガラス板及びス
テンレス製加工盤より容易に剥離することができた。な
お、ガラス板及びステンレス製加工盤に対する加熱後の
粘着力は、それぞれ、０．１２Ｎ／２５ｍｍ、０．１４
Ｎ／２５ｍｍであり、初期に比べて１／１０以下に低下
していることを確認した。Using this heat-peelable double-sided pressure-sensitive adhesive tape / sheet, a stainless steel processing board and a glass plate were bonded together. Then, when the laminated stainless steel processing board and the glass plate were heated with a hot plate at 120 ° C. for 60 seconds, the heat-peelable double-sided pressure-sensitive adhesive tape / sheet was easily peeled off from the glass plate and the stainless steel processing board. Was completed. The adhesive strength after heating to the glass plate and the stainless steel processing board was 0.12 N / 25 mm and 0.14 N / 25 mm, respectively.
N / 25 mm, which was confirmed to be 1/10 or less of the initial value.
【００７５】また、剥離後の被着体表面をデジタルマイ
クロスコープＶＨ−６２００（キーエンス社製）により
観察したところ、被着体面には粘着剤残りが認められ
ず、優れた加熱剥離性を示していることを確認した。When the surface of the adherend after peeling was observed with a digital microscope VH-6200 (manufactured by Keyence Corporation), no adhesive residue was observed on the surface of the adherend, showing excellent heat peelability. I confirmed that.
【００７６】以上のように、本発明の加熱剥離型両面粘
着テープ・シートは、良好な初期粘着特性と加熱後の易
剥離性を兼ね備えており、加熱剥離型粘着テープ・シー
トとしての機能を兼ね備えていることを確認した。 ［実施例５〜１３］実施例１〜４の場合と同様にして、
表１に示すような組成、作製条件で加熱剥離型粘着テー
プ・シートを作製した。なお、表１において、熱架橋剤
は、すべてＬ−４５（綜研化学社製）０．３部（溶剤を
含まない、活性官能基を有するアクリル系粘着高分子量
体１００部に対して）を添加した。また、粘着力等を測
定する前に、この加熱剥離型粘着テープ・シートを室温
で１週間放置し、エージングさせた。As described above, the heat-peelable double-sided pressure-sensitive adhesive tape / sheet of the present invention has both good initial adhesive properties and easy peelability after heating, and also functions as a heat-peelable pressure-sensitive adhesive tape / sheet. Confirmed that. [Examples 5 to 13] In the same manner as in Examples 1 to 4,
A heat-peelable pressure-sensitive adhesive tape / sheet was produced under the composition and production conditions shown in Table 1. In Table 1, 0.3 parts of L-45 (manufactured by Soken Chemical Co., Ltd.) (based on 100 parts of an acrylic functional polymer having an active functional group and containing no solvent) was added as the thermal crosslinking agent. did. Before measuring the adhesive strength and the like, the heat-peelable pressure-sensitive adhesive tape / sheet was left at room temperature for one week to be aged.
【００７７】これらの加熱剥離型粘着テープ・シートの
ステンレス板に対する初期粘着力（１８０°ピール力）
及び１２０℃で６０秒間、熱板で加熱後の粘着力と被着
体に対する粘着剤残りの観察結果を表２に示す。表から
分かるように、いずれの粘着テープも良好な初期粘着特
性と加熱後の易剥離性を示し、加熱剥離型粘着テープ・
シートとしての機能を兼ね備えていることを確認した。
また、加熱剥離型粘着テープ・シートを作製する際の塗
工性などの量産性も良好であった。The initial adhesive force (180 ° peel force) of these heat-peelable pressure-sensitive adhesive tapes / sheets to a stainless steel plate
Table 2 shows the adhesive strength after heating with a hot plate at 120 ° C. for 60 seconds and the observation result of the adhesive remaining on the adherend. As can be seen from the table, each of the adhesive tapes has good initial adhesive properties and easy peelability after heating.
It was confirmed that it also had the function of a seat.
In addition, mass productivity such as coatability when producing a heat-peelable pressure-sensitive adhesive tape / sheet was also good.
【００７８】[0078]
【表１】 [Table 1]
【００７９】[0079]
【表２】 [比較例１]重量平均分子量が７０万、水酸基価が５０ｍ
ｇＫＯＨ／ｇである、活性官能基を含有しないアクリル
酸２−エチルヘキシルを主成分とするアクリル系粘着高
分子量体の３０重量％酢酸エチル溶液１００部に、ポリ
イソシアネート系熱架橋剤０．２部及び及び発泡剤粒子
１，１’−アゾビス（１−アセトキシ−１−フェニルエ
タン）２部を添加し、十分に混合し、粘着剤を得た。[Table 2] [Comparative Example 1] a weight average molecular weight of 700,000 and a hydroxyl value of 50 m
0.2 parts of a polyisocyanate-based thermal cross-linking agent was added to 100 parts of a 30% by weight ethyl acetate solution of an acrylic adhesive high molecular weight material mainly containing 2-ethylhexyl acrylate containing no active functional group and having a gKOH / g content. And 2 parts of blowing agent particles 1,1′-azobis (1-acetoxy-1-phenylethane) were added and mixed well to obtain a pressure-sensitive adhesive.
【００８０】この粘着剤をコロナ剥離処理された５０μ
ｍ厚のポリエステルフィルム上に、コンマコーターによ
り塗工し、８０℃／１０分間で加熱乾燥し、１００μｍ
厚の加熱剥離型粘着テープ・シートを得た。This adhesive was treated with a corona-peeled 50 μm
Coating on a polyester film having a thickness of m by a comma coater, and drying by heating at 80 ° C./10 minutes.
A thick heat-peelable adhesive tape sheet was obtained.
【００８１】この加熱剥離型粘着テープ・シートのステ
ンレス板に対する初期粘着力（１８０°ピール力）は、
４．０Ｎ／１０ｍｍであったが、４０℃における保持力
試験（荷重：１ｋｇ）において、1時間以内に落下し
た。また、１２０℃で６０秒間、熱板で加熱後のステン
レス板に対する粘着力（１８０°ピール力）は、２．０
Ｎ／１０ｍｍで、粘着力の低下は大きくなく、また、剥
離後の被着体面に粘着剤残りが認められ、実用に供し得
ないものであることが分かった。The initial adhesive force (180 ° peel force) of the heat-peelable pressure-sensitive adhesive tape / sheet to the stainless steel plate is as follows:
It was 4.0 N / 10 mm, but dropped within one hour in a holding force test (load: 1 kg) at 40 ° C. The adhesive force (180 ° peel force) to the stainless steel plate after heating with a hot plate at 120 ° C. for 60 seconds is 2.0
At N / 10 mm, the adhesive strength was not significantly reduced, and the adhesive remained on the surface of the adherend after peeling, indicating that the adhesive could not be put to practical use.
【００８２】[0082]
【発明の効果】以上、説明したように、本発明は、活性
官能基を有するアクリル系粘着高分子量体及び熱架橋剤
を主成分とする粘着剤に、発泡剤粒子を分散させた粘着
剤を用いて作製した加熱剥離型粘着テープ・シートにお
いて、上記活性官能基を有するアクリル系粘着高分子量
体がラジカル活性種と反応して架橋する官能基を有する
アクリル系粘着高分子量体であり、かつ、発泡剤粒子が
加熱により窒素ガスを放出すると同時にラジカル活性種
を発生する化合物であるため、粘着力、保持力等の初期
粘着特性が良好で、かつ、加熱後に簡単に被着体より剥
離できる加熱剥離型粘着テープ・シートを得ることがで
きる。As described above, the present invention relates to a pressure-sensitive adhesive obtained by dispersing foaming agent particles in a pressure-sensitive adhesive mainly composed of an acrylic pressure-sensitive adhesive polymer having an active functional group and a thermal crosslinking agent. In the heat-peelable pressure-sensitive adhesive tape / sheet produced using the above, the acrylic pressure-sensitive adhesive high molecular weight material having the active functional group is an acrylic pressure-sensitive high molecular weight material having a functional group that reacts and crosslinks with a radical active species, and Since the foaming agent particles release nitrogen gas upon heating and generate radical active species at the same time, they have good initial adhesive properties such as adhesive strength and holding power, and can be easily peeled off from the adherend after heating. A peelable pressure-sensitive adhesive tape / sheet can be obtained.
【００８３】また、本発明の加熱剥離型粘着テープ・シ
ートは、活性官能基を有するアクリル系粘着高分子量体
の重量平均分子量が１０万〜２００万であり、活性官能
基の含有量が０．０１〜２．０ミリ当量／ｇであり、か
つ、水酸基価が１０〜１００ｍｇＫＯＨ／ｇであるた
め、粘着力、保持力等の初期粘着特性が良好で、かつ、
上記加熱剥離型粘着テープ・シートを量産的に製造する
ことが可能である。Further, in the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention, the weight average molecular weight of the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group is from 100,000 to 2,000,000, and the content of the active functional group is from 0.1 to 2,000,000. 01 to 2.0 meq / g, and the hydroxyl value is 10 to 100 mgKOH / g, so that the initial adhesive properties such as adhesive strength and holding power are good, and
The heat-peelable pressure-sensitive adhesive tape / sheet can be mass-produced.
【００８４】また、本発明の加熱剥離型粘着テープ・シ
ートは、基材の片面又は両面に、発泡剤粒子を含まない
アクリル系粘着剤を用いた粘着剤下層と、上記発泡剤粒
子を含む粘着剤を用いた粘着剤上層とからなる２層構造
の粘着剤層であるため、優れた初期粘着特性と、加熱時
の易剥離性を示す。Further, the heat-peelable pressure-sensitive adhesive tape / sheet of the present invention comprises, on one or both sides of a substrate, a pressure-sensitive adhesive lower layer using an acrylic pressure-sensitive adhesive containing no foaming agent particles; Since it is a pressure-sensitive adhesive layer having a two-layer structure composed of a pressure-sensitive adhesive upper layer using an agent, it exhibits excellent initial pressure-sensitive adhesive properties and easy peelability upon heating.
【００８５】加熱剥離型粘着テープ・シートの製造方法
において、基材の片面又は両面に上記発泡剤粒子を含む
粘着剤を塗工、乾燥し、粘着剤層を５〜５００μｍ厚に
形成するため、粘着力、保持力等の初期粘着特性が良好
で、かつ、加熱後に簡単に被着体より剥離できる加熱剥
離型粘着テープ・シートを量産的に製造することが可能
である。In the method for producing a heat-peelable pressure-sensitive adhesive tape / sheet, a pressure-sensitive adhesive containing the foaming agent particles is applied to one or both surfaces of a substrate and dried to form a pressure-sensitive adhesive layer having a thickness of 5 to 500 μm. It is possible to mass-produce a heat-peelable pressure-sensitive adhesive tape / sheet which has good initial adhesive properties such as adhesive strength and holding power and can be easily peeled off from an adherend after heating.
【００８６】加熱剥離型粘着テープ・シートの製造方法
において、基材の片面又は両面に発泡剤粒子を含まない
粘着剤を塗工、乾燥し、粘着剤下層を５〜２００μｍ厚
に形成し、その上に上記発泡剤粒子を含む粘着剤を塗
工、乾燥し、粘着剤上層を５〜５００μｍ厚に形成する
ため、粘着力、保持力等の初期粘着特性が良好で、か
つ、加熱後に簡単に被着体より剥離できる加熱剥離型粘
着テープ・シートを量産的に製造することが可能であ
る。In the method for producing a heat-peelable pressure-sensitive adhesive tape / sheet, a pressure-sensitive adhesive containing no foaming agent particles is applied to one or both surfaces of a substrate and dried to form a pressure-sensitive adhesive lower layer having a thickness of 5 to 200 μm. The pressure-sensitive adhesive containing the foaming agent particles is applied on top and dried to form a pressure-sensitive adhesive upper layer having a thickness of 5 to 500 μm, so that the initial adhesive properties such as adhesive strength and holding power are good, and easily after heating. It is possible to mass-produce a heat-peelable pressure-sensitive adhesive tape / sheet that can be peeled from an adherend.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 名手 和男 神奈川県川崎市多摩区登戸3819番地 株式 会社スリオンテック内 Ｆターム(参考） 4J004 AA10 AA17 AB01 AB05 AC03 CA06 CA08 CB01 CB02 CB04 CE01 FA05 GA01 4J040 EC002 EF181 EF281 FA231 GA05 GA07 GA19 HB05 HC14 HC15 HC17 HC18 HD13 HD41 JA02 JA09 JB09 KA16 KA23 KA37 LA01 LA06 PA42 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuo Nade 3819 Notobe, Tama-ku, Kawasaki-shi, Kanagawa F-Term in Sliontec Co., Ltd. (Reference) 4J004 AA10 AA17 AB01 AB05 AC03 CA06 CA08 CB01 CB02 CB04 CE01 FA05 GA01 4J040 EC002 EF181 EF281 FA231 GA05 GA07 GA19 HB05 HC14 HC15 HC17 HC18 HD13 HD41 JA02 JA09 JB09 KA16 KA23 KA37 LA01 LA06 PA42
Claims (5)
るアクリル系粘着高分子量体と、熱架橋剤と、有機溶剤
と、発泡剤粒子とを主成分とする粘着剤を用いて粘着剤
層を形成した加熱剥離型粘着テープ・シートにおいて、
上記活性官能基を有するアクリル系粘着高分子量体がラ
ジカル活性種と反応して架橋する官能基を有するアクリ
ル系粘着高分子量体であり、かつ、上記発泡剤粒子が加
熱により窒素ガスを放出すると同時にラジカル活性種を
発生する化合物であることを特徴とする加熱剥離型粘着
テープ・シート。1. An adhesive having an active functional group-containing acrylic adhesive high molecular weight material, a thermal crosslinking agent, an organic solvent, and foaming agent particles on one or both surfaces of a substrate. In the heat-peelable pressure-sensitive adhesive tape sheet with the agent layer formed,
The acrylic pressure-sensitive adhesive high molecular weight material having an active functional group is an acrylic pressure-sensitive high molecular weight material having a functional group capable of reacting and crosslinking with a radical active species, and the blowing agent particles release nitrogen gas by heating at the same time. A heat-peelable pressure-sensitive adhesive tape / sheet, which is a compound that generates a radical active species.
ートにおいて、活性官能基を有するアクリル系粘着高分
子量体の重量平均分子量が１０万〜２００万であり、活
性官能基の含有量が０．０１〜２．０ミリ当量／ｇであ
り、かつ、水酸基価が１０〜１００ｍｇＫＯＨ／ｇであ
ることを特徴とする加熱剥離型粘着テープ・シート。2. The heat-peelable pressure-sensitive adhesive tape / sheet according to claim 1, wherein the weight-average molecular weight of the acrylic pressure-sensitive adhesive high molecular weight material having an active functional group is 100,000 to 2,000,000, and the content of the active functional group is A heat-peelable pressure-sensitive adhesive tape / sheet, which is 0.01 to 2.0 meq / g and has a hydroxyl value of 10 to 100 mgKOH / g.
ないアクリル系粘着剤を用いて粘着剤下層を形成し、そ
の上に請求項１記載の発泡剤粒子を含む粘着剤を用いて
粘着剤上層を形成し、２層構造の粘着剤層としたことを
特徴とする加熱剥離型粘着テープ・シート。3. A pressure-sensitive adhesive lower layer is formed on one or both sides of a base material using an acrylic pressure-sensitive adhesive containing no foaming agent particles, and the pressure-sensitive adhesive containing the foaming agent particles according to claim 1 is formed thereon. A heat-peelable pressure-sensitive adhesive tape / sheet, characterized in that a pressure-sensitive adhesive upper layer is formed to form a pressure-sensitive adhesive layer having a two-layer structure.
剤粒子を含む粘着剤を塗工、乾燥し、粘着剤層を５〜５
００μｍ厚に形成したことを特徴とする加熱剥離型粘着
テープ・シートの製造方法。4. A pressure-sensitive adhesive containing the foaming agent particles according to claim 1 is applied to one or both surfaces of a substrate and dried to form a pressure-sensitive adhesive layer of 5 to 5 times.
A method for producing a heat-peelable pressure-sensitive adhesive tape / sheet, which is formed to a thickness of 00 μm.
い粘着剤を塗工、乾燥し、粘着剤下層を５〜２００μｍ
厚に形成し、その上に請求項１記載の発泡剤粒子を含む
粘着剤を塗工、乾燥し、粘着剤上層を５〜５００μｍ厚
に形成したことを特徴とする加熱剥離型粘着テープ・シ
ートの製造方法。5. A pressure-sensitive adhesive containing no foaming agent particles is applied to one or both surfaces of the substrate and dried, and the pressure-sensitive adhesive lower layer is formed to a thickness of 5 to 200 μm.
A heat-peelable pressure-sensitive adhesive tape / sheet formed by applying a pressure-sensitive adhesive containing the foaming agent particles according to claim 1 thereon, drying the pressure-sensitive adhesive, and forming the pressure-sensitive adhesive upper layer to a thickness of 5 to 500 μm. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000278324A JP4673965B2 (en) | 2000-09-13 | 2000-09-13 | Heat-peelable adhesive tape / sheet and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000278324A JP4673965B2 (en) | 2000-09-13 | 2000-09-13 | Heat-peelable adhesive tape / sheet and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002088321A true JP2002088321A (en) | 2002-03-27 |
| JP4673965B2 JP4673965B2 (en) | 2011-04-20 |
Family
ID=18763507
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000278324A Expired - Lifetime JP4673965B2 (en) | 2000-09-13 | 2000-09-13 | Heat-peelable adhesive tape / sheet and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4673965B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011225668A (en) * | 2010-04-16 | 2011-11-10 | Sekisui Chem Co Ltd | Expandable adhesive and expandable adhesive tape |
| JP2012089605A (en) * | 2010-10-18 | 2012-05-10 | Tokyo Ohka Kogyo Co Ltd | Adhesive agent laminate, adhesion film, and adhesion method |
| JP2013133464A (en) * | 2011-12-27 | 2013-07-08 | Nitto Denko Corp | Pressure-sensitive adhesive sheet for glass plate |
| JP2014040595A (en) * | 2013-09-26 | 2014-03-06 | Nitto Denko Corp | Heat-peelable pressure-sensitive adhesive tape or sheet |
| WO2015146312A1 (en) * | 2014-03-26 | 2015-10-01 | ニッタ株式会社 | Double-sided adhesive tape for temporary fixing and method for temporarily fixing workpiece using same |
| WO2020121999A1 (en) * | 2018-12-13 | 2020-06-18 | 日東電工株式会社 | Adhesive composition and adhesive sheet |
| CN113242893A (en) * | 2018-12-13 | 2021-08-10 | 日东电工株式会社 | Adhesive composition and adhesive sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6330581A (en) * | 1986-07-25 | 1988-02-09 | Nitto Electric Ind Co Ltd | Pressure-sensitive adhesive of adhesive force vanishing type |
| JPH0762304A (en) * | 1993-08-31 | 1995-03-07 | Sekisui Chem Co Ltd | Production of pressure-sensitive adhesive tape |
| JP2000239620A (en) * | 1999-02-19 | 2000-09-05 | Fujimori Kogyo Co Ltd | Thermal release self-adhesive and self-adhesive member using same |
-
2000
- 2000-09-13 JP JP2000278324A patent/JP4673965B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6330581A (en) * | 1986-07-25 | 1988-02-09 | Nitto Electric Ind Co Ltd | Pressure-sensitive adhesive of adhesive force vanishing type |
| JPH0762304A (en) * | 1993-08-31 | 1995-03-07 | Sekisui Chem Co Ltd | Production of pressure-sensitive adhesive tape |
| JP2000239620A (en) * | 1999-02-19 | 2000-09-05 | Fujimori Kogyo Co Ltd | Thermal release self-adhesive and self-adhesive member using same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011225668A (en) * | 2010-04-16 | 2011-11-10 | Sekisui Chem Co Ltd | Expandable adhesive and expandable adhesive tape |
| JP2012089605A (en) * | 2010-10-18 | 2012-05-10 | Tokyo Ohka Kogyo Co Ltd | Adhesive agent laminate, adhesion film, and adhesion method |
| JP2013133464A (en) * | 2011-12-27 | 2013-07-08 | Nitto Denko Corp | Pressure-sensitive adhesive sheet for glass plate |
| JP2014040595A (en) * | 2013-09-26 | 2014-03-06 | Nitto Denko Corp | Heat-peelable pressure-sensitive adhesive tape or sheet |
| WO2015146312A1 (en) * | 2014-03-26 | 2015-10-01 | ニッタ株式会社 | Double-sided adhesive tape for temporary fixing and method for temporarily fixing workpiece using same |
| WO2020121999A1 (en) * | 2018-12-13 | 2020-06-18 | 日東電工株式会社 | Adhesive composition and adhesive sheet |
| CN113242893A (en) * | 2018-12-13 | 2021-08-10 | 日东电工株式会社 | Adhesive composition and adhesive sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4673965B2 (en) | 2011-04-20 |
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