JP2000248241A - Pressure-sensitive double-sided adhesive tape and its production - Google Patents

Pressure-sensitive double-sided adhesive tape and its production

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JP2000248241A
JP2000248241A JP5433099A JP5433099A JP2000248241A JP 2000248241 A JP2000248241 A JP 2000248241A JP 5433099 A JP5433099 A JP 5433099A JP 5433099 A JP5433099 A JP 5433099A JP 2000248241 A JP2000248241 A JP 2000248241A
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pressure
layer
sensitive
adhesive tape
adhesive
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JP5433099A
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JP3384979B2 (en )
Inventor
Akiyoshi Masuda
Kazuo Nate
Takahiro Sakai
和男 名手
晃良 増田
貴広 酒井
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Sliontec Corp
株式会社スリオンテック
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Abstract

PROBLEM TO BE SOLVED: To obtain the subject adhesive tape with high tackiness and high heat resistance compatible with each other, excellent in operability such as thick film coatability and photocurability, and to provide a method for producing the above adhesive tape. SOLUTION: This pressure-sensitive double-sided adhesive tape is obtained by the following process: using a photocurable tack agent consisting mainly of a (meth)acrylic alkyl ester monomer, a polar group-contg. monomer, a photoactive functional group-bearing acrylic polymer, and a photopolymerization initiator, and a base material layer composition comprising the above photocurable tack agent and a filler, or the like, a sheet substrate is coated with a tack agent layer, a base material layer and a tack agent layer, successively, followed by light irradiation to polymerize the photocurable tack agent layer of three-layer structure, wherein the photoactive functional group-contg. acrylic polymer to be used is a polymer 200,000-3000,000 in weight-average molecular weight and 0.001-0.5 meq/g in photoactive functional group content.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、アクリル系感圧性両面接着テープ及びその製造方法に係り、特に、高粘着性と高耐熱性とを両立し、かつ、厚膜塗工性や紫外線硬化性に優れたアクリル系感圧性両面接着テープ及びその製造方法に関する。 BACKGROUND OF THE INVENTION The present invention relates to a pressure sensitive double-sided adhesive tape and a method of manufacturing the acrylic-sensitive, in particular, to achieve both high tack and high heat resistance, and a thick film coating properties and ultraviolet curable about excellent acrylic pressure-sensitive double-sided adhesive tape and a manufacturing method thereof.

【0002】 [0002]

【従来の技術】電気・電子分野、建築・土木分野、自動車関係などの業界では、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。 BACKGROUND OF THE INVENTION electrical and electronic fields, construction and civil engineering sector, in industries such as Automotive, high-performance products, high-performance, due to such diversification, adhesive is used in the bonding of the components and the pressure-sensitive adhesive the agent high heat resistance, high adhesiveness, there is a growing demand for such high reliability.

【0003】特に、近年、作業性や作業環境の向上の観点から、液状接着剤に替わってテープ状やシート状の感圧性接着剤(以下、「感圧性接着」を「粘着」と称する。)を用いて各種部品を接合することが多くなっている。 In particular, in recent years, from the viewpoint of improving the workability and working environment, instead of the liquid adhesive tape or sheet form pressure sensitive adhesive (hereinafter, referred to as "pressure-sensitive adhesive" and "adhesive".) We are increasingly joining the various components used. また、粘着シートの使用目的もこれまでの仮止めの用途だけではなく、永久接着としての用途にも使用されている。 Furthermore, the intended use of the adhesive sheet is also not only temporary bonding applications so far, have also been used for applications as a permanent adhesive.

【0004】また、廃棄物処理のし易さの観点から、これまでの機械的な接合に替わって、粘着テープの使用が多くなりつつあり、テープ厚が比較的大きい、例えば、 [0004] From the viewpoint of waste disposal ease, in place of the mechanical interface of the far becoming much use of adhesive tape, the tape thickness is relatively large, for example,
0.5〜2mm厚の粘着テープが望まれている。 0.5~2mm thickness adhesive tape is desired.

【0005】従来、粘着テープの製造方法としては、溶剤型粘着剤あるいはエマルジョンなどの水系粘着剤をポリエステルフィルムや紙などの基材上に塗工し、しかる後に加熱により溶剤を揮発させ、粘着剤を架橋・硬化させる方法が採用されてきた。 Conventionally, as a method of producing the pressure-sensitive adhesive tape, a water-based adhesive such as a solvent-type pressure-sensitive adhesive or emulsion is coated on a substrate such as a polyester film or paper, the solvent is volatilized by heating Thereafter, the pressure-sensitive adhesive the method of cross-linking and curing the have been adopted.

【0006】ところが、従来から使用されている加熱により硬化する溶剤型粘着テープは、耐熱性や接合後の信頼性が不十分なため、近年、紫外線硬化型の粘着テープ(例えば、特開昭63−268784号公報、特開平9 [0006] However, solvent type adhesive tape which is cured by heating, which is conventionally used, because of insufficient reliability after heat resistance and bonding, in recent years, ultraviolet curable pressure sensitive tape (e.g., JP 63 -268784, JP-A No. 9
−137142号公報など)が開発されている。 Such as -137,142 JP) has been developed.

【0007】しかし、かかる紫外線硬化型の粘着テープにおいても、高粘着性と高耐熱性を両立し、かつ、厚膜塗工性や紫外線硬化性などの作業性に優れた粘着テープを得ることが困難であり、その解決を図る為の材料・プロセスの開発が望まれていた。 However, even in the pressure-sensitive adhesive tape according ultraviolet curable, and both high tack and high heat resistance, and, to obtain a pressure-sensitive adhesive tape having excellent workability, such as thick film coatability or ultraviolet curable it is difficult, the development of materials and processes for achieving the resolution has been desired.

【0008】 [0008]

【発明が解決しようとする課題】本発明の目的は、上記した従来技術の有していた課題を解決して、高粘着性と高耐熱性を両立し、かつ、厚膜塗工性や紫外線硬化性などの作業性に優れた粘着テープ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 provide a, to solve the problems had of the prior art described above, and both high tack and high heat resistance, and a thick film coating properties and ultraviolet to provide an excellent pressure-sensitive adhesive tape and a method of manufacturing the same in workability such as curability.

【0009】 [0009]

【課題を解決するための手段】上記目的を達成する為に、発明者らは各種材料・プロセスを検討した結果、 Means for Solving the Problems] To achieve the above object, the inventors have found that examined the various materials and processes,
(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光活性官能基を有するアクリル系高分子量体及び光重合開始剤を主成分としてなる光硬化型粘着剤をシート基材上に塗工し、これを光照射により重合させ作製した感圧性両面接着テープが、高粘着性と高耐熱性とを両立し、かつ、厚膜塗工性や紫外線硬化性などの作業性にも優れたものであることを見出した。 (Meth) light curable adhesive comprising as a main component acrylic high molecular weight and a photopolymerization initiator having an acrylic acid alkyl ester monomer and a polar group-containing monomer and a photoactive functional groups on the sheet substrate coated, which pressure-sensitive double-sided adhesive tape produced by polymerizing by light irradiation, to achieve both high tack and high heat resistance, and excellent in workability such as thick film coatability or ultraviolet curable it was found that those were.

【0010】ここで使用される光活性官能基を有するアクリル系高分子量体としては、重量平均分子量が20万〜300万であり、かつ、その光活性官能基含有量が0.001〜0.5ミリ当量/gであるものが良いことを見出し、これを含む光硬化型粘着剤を用いて作製した感圧性両面接着テープが優れた接着特性を示すことを確認した。 [0010] The acrylic high polymer having a photoactive functional group as used herein, the weight average molecular weight of 200,000 to 3,000,000, and its photoactive functional group content 0.001 to 0. 5 found that millimeter is what is good equivalents / g, and was confirmed to exhibit adhesive properties pressure sensitive double-sided adhesive tape was produced was excellent with a light curable adhesive comprising the same.

【0011】すなわち、上記光硬化型粘着剤を用いることにより、粘着性と耐熱性に優れ、かつ、厚膜塗工性などの作業性に優れた粘着テープを得ることができる。 [0011] That is, by using the above light curable adhesive, excellent adhesion and heat resistance, and can be obtained an adhesive tape which is excellent in workability such as thick film coatability.

【0012】以下、本発明で使用する材料及び粘着テープの作製方法について説明する。 [0012] The following describes the materials and manufacturing method of the pressure-sensitive adhesive tape used in the present invention.

【0013】光活性官能基を有するアクリル系高分子量体は、粘着テープの耐熱性を向上させるために使用されるとともに、厚膜塗工性などの作業性を向上させる為にも使用される。 [0013] acrylic high polymer having a photoactive functional group, while being used to improve the heat resistance of the adhesive tape, is also used to improve the workability of such a thick film coating properties. 本発明で使用する光活性官能基を有するアクリル系高分子量体としては、重量平均分子量が20 The acrylic high polymer having a photoactive functional group for use in the present invention, the weight average molecular weight of 20
万〜300万であり、光活性官能基含有量が0.001 A 3,000,000, photoactive functional group content of 0.001
〜0.5ミリ当量/gであるアクリル系高分子量体であるものが良い。 0.5 millimeters good things an acrylic high molecular weight is equivalent / g.

【0014】光活性官能基をアクリル系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、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のイソシアネート化合物と反応させる方法などがある。 [0014] The photoactive functional groups as a method of introducing the acrylic high polymer usually has a hydroxyl group on the side chain of the acrylic high polymer with (meth) acryloyloxy group, e.g., 2-methacryloyloxy and a method of reacting an isocyanate compound such as ethyl isocyanate. このようにして、(メタ)アクリロイルオキシ基などの光活性官能基を有するアクリル系高分子量体を得ることができる。 In this way, it is possible to obtain an acrylic high polymer having a photoactive functional group such as (meth) acryloyloxy group. しかし、その導入方法は、特に限定されるものではない。 However, the manner of its introduction is not particularly limited.

【0015】上記光活性官能基を有するアクリル系高分子量体の重量平均分子量が20万より小さい場合には、 [0015] If the weight average molecular weight of the acrylic high polymer having the photoactive functional group is 200,000 less than,
厚膜塗工性などを考慮して、数千〜数万cpの高粘度の粘着剤組成を得るためには、上記光活性官能基を有するアクリル系高分子量体の添加量を多くする必要がある。 In consideration of the thick-film coatability, in order to obtain a pressure-sensitive adhesive composition of the high viscosity of thousands to tens of thousands cp, the need to increase the amount of the acrylic high polymer having the photoactive functional group is there.
その結果、粘着テープは優れた粘着特性(具体的には、 The result, the adhesive tape is superior adhesive properties (specifically,
ステンレス基板に対する5kgf/25mm以上の粘着力)と耐熱性(具体的には、150℃の保持力)を両立することができず、好ましくない。 Stainless 5 kgf / 25 mm or more adhesion to the substrate) and heat resistance (specifically, it is impossible to achieve both 150 retention of ° C.), it is not preferred. また、重量平均分子量が300万より大きい場合には、粘着テープは特性上特に問題ないが、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。 Also, If the weight average molecular weight is more than 3,000,000, although the adhesive tape is not characteristic particular problem, it is difficult to manufacture in mass production of acrylic high polymer, is not preferable.

【0016】また、上記光活性官能基を有するアクリル系高分子量体の光活性官能基含有量が0.001ミリ当量/gより小さい場合には、粘着テープの 150℃の保持力が悪くなり、また、上記光活性官能基含有量が0.5 [0016] Also, when the photoactive functional group content of the acrylic high polymer having the photoactive functional group is 0.001 meq / g less than holding force of 0.99 ° C. of the adhesive tape is degraded, also, the photoactive functional group content of 0.5
ミリ当量/gより大きい場合には、粘着テープのステンレス基板に対する粘着力が 5kgf/25mmより低くなり、いずれの場合にも好ましくない。 When milli equivalent weight of more than / g, the adhesive strength to a stainless steel substrate of the adhesive tape is lower than 5 kgf / 25 mm, it is not preferred in each case. なお、粘着剤組成中の上記光活性官能基を有するアクリル系高分子量体の配合量は、目的とする粘着特性や塗工する際の粘度に応じて調整されるが、通常、粘着剤組成において10〜50重量%で使用される。 The amount of the acrylic high polymer having the photoactive functional group in the adhesive composition is adjusted depending on the viscosity at the time of pressure-sensitive adhesive property and coating of interest, usually in the adhesive composition as it used 10 to 50% by weight.

【0017】なお、上記光活性官能基を有するアクリル系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、アクリル酸イソオクチ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。 [0017] Incidentally, the main component of the acrylic high polymer having the photoactive functional group is typically a copolymer of (meth) acrylic acid alkyl ester monomer and a polar group-containing monomer, e.g., acrylic copolymers of 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate, but terpolymers of acrylic acid isooctyl acrylic acid and 2-hydroxyethyl methacrylate is used, it is not particularly limited to these not.

【0018】次に、本発明で使用する上記(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。 Next, as the (meth) acrylic acid alkyl ester monomer used in the present invention include, for example, ethyl group, propyl group, butyl group, a pentyl group, a hexyl group, a 2-ethylhexyl group, an octyl group, isooctyl group, a nonyl group, isononyl group, typically represented by decyl group, and carbon atoms having 20 or fewer alkyl esters of (meth) acrylic acid and the like. 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。 Incidentally, the above-mentioned (meth) acrylic acid alkyl ester may be used singly or two or more kinds. また、本発明においては、 Further, in the present invention,
上記(メタ)アクリル酸アルキルエステルの一部を、例えば、酢酸ビニル等の共重合性単量体で置き換えてもよい。 A part of the (meth) acrylic acid alkyl esters, for example, may be replaced by copolymerizable monomers such as vinyl acetate.

【0019】本発明で使用する上記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 [0019] As the polar group-containing monomer used in the present invention include acrylic acid, methacrylic acid, itaconic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl acrylate, acrylonitrile, methacryl Ronitoriru, N- vinyl-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。 - represented by pyrrolidone, carboxyl groups in the molecule, a hydroxyl group, polymerizable unsaturated monomer having a polar group such as an amino group.

【0020】その配合量は、上記した(メタ)アクリル酸アルキルエステル99〜70重量部に対して、1〜3 [0020] the amount thereof, with respect to the above-mentioned (meth) 99 to 70 parts by weight of acrylic acid alkyl esters, 1-3
0重量部であることが好ましい。 0 is preferably part by weight. 極性基含有単量体が1 Polar group-containing monomer is 1
重量部より少ない場合には、粘着テープの粘着力等が低下し、また、30重量部より多い場合には、特に粘着テープの低温時の粘着特性等が低下し、いずれの場合も好ましくない。 If less than parts by weight, reduced adhesive strength or the like of the adhesive tape, and when more than 30 parts by weight, decreases in particular adhesive characteristics at low temperatures of the pressure-sensitive adhesive tape, undesirable in any case. なお、上記した極性基含有単量体は、単独もしくは2種以上で使用される。 Incidentally, the polar group-containing monomer mentioned above may be used singly or two or more kinds.

【0021】上記光重合開始剤としては、ビニル基や(メタ)アクリロイルオキシ基などのラジカル光重合に使用される通常の光重合開始剤が使用される。 [0021] As the photopolymerization initiator, conventional photopolymerization initiator used for the radical photopolymerization of vinyl groups or (meth) acryloyloxy groups is used. 例えば、 For example,
2,2−ジメトキシ−1,2−ジフェニルエタン−1− 2,2-dimethoxy-1,2-diphenylethane-1
オン(チバガイギー社のイルガキュア651)などのベンジルジメチルケタール系化合物、1−ヒドロキシシクロヘキシルフェニルケトン(チバガイギー社のイルガキュア184)、2−ヒドロキシ−2−メチル−1−フェニルプロパン−1−オン(チバガイギー社のダロキュア1173)などのα−ヒドロキシケトン系化合物、2− On benzyl dimethyl ketal compounds such as (Ciba-Geigy Irgacure 651), 1-hydroxycyclohexyl phenyl ketone (Ciba Geigy Irgacure 184), 2-hydroxy-2-methyl-1-one (Ciba Geigy Darocure 1173) alpha-hydroxy ketone compounds such as 2-
ベンジル−2−ジメチルアミノ−1−(4−モルフォリノフェニル)ブタノン−1(チバガイギー社のイルガキュア369)などのα−アミノケトン系化合物、ビス(2,4,6−トリメチルベンゾイル)フェニルフォスフィンオキサイド(チバガイギー社のイルガキュア81 Benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone -1 alpha-amino ketone compounds, such as (Ciba-Geigy Irgacure 369), bis (2,4,6-trimethylbenzoyl) phenyl phosphine oxide ( Ciba-Geigy Irgacure 81
9)などのビスアシルフォスフィンオキサイド系化合物、ビス(2,6−ジメトキシベンゾイル)−2,4, 9) bisacylphosphine oxide compounds such as bis (2,6-dimethoxybenzoyl) -2,4,
4−トリメチルペンチルフォスフィンオキサイドなどのビスアシルフォスフィンオキサイドとダロキュア117 4-trimethyl pentyl phosphine bisacylphosphine oxides such as fins oxide and Darocure 117
3との1:3混合物(チバガイギー社のイルガキュア1 3 and of 1: 3 mixture (Ciba-Geigy Irgacure 1
700)、ビス(2,6−ジメトキシベンゾイル)− 700), bis (2,6-dimethoxybenzoyl) -
2,4,4−トリメチルペンチルフォスフィンオキサイドなどのビスアシルフォスフィンオキサイドとイルガキュア184との1:1混合物(チバガイギー社のイルガキュア1850)、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテルなどのベンゾインエチルエーテル系化合物等が挙げられル。 2,4,4-trimethylpentyl phosphine oxide and bisacylphosphine oxide and Irgacure 184, such as 1: 1 mixture of (Ciba-Geigy Irgacure 1850), benzoin ethyl ether, benzoin ethyl ether compounds such as benzoin isopropyl ether Le, and the like. 特に、光照射により1分子より2個以上の活性種(ラジカル)を発生するビスアシルフォスフィンオキサイド系化合物などの光重合開始剤が望ましい。 In particular, photoinitiators, such as bisacylphosphine oxide compounds that occur two or more active species from one molecule by light irradiation (the radical) is desirable.

【0022】これらの光重合開始剤は、光硬化型粘着剤100重量部に対して0.001〜5重量部の割合で使用されるのが好ましい。 [0022] These photopolymerization initiators are preferably used in a proportion of 0.001 to 5 parts by weight with respect to the light-curable adhesive 100 parts by weight. その使用量が0.001重量部より少ない場合には重合を十分に完了させるのが難しく、また、その使用量が5重量部より多い場合には得られる粘着剤ポリマーの分子量が小さくなり、粘着テープの粘着特性が低下し、いずれも粘着特性上好ましくない。 Sufficiently difficult to complete the polymerization if the amount used is less than 0.001 part by weight, also reduced the molecular weight of the resulting adhesive polymer in which case the amount is more than 5 parts by weight, the adhesive adhesive properties of the tape is decreased, both the adhesive characteristics is not preferable.

【0023】更に、本発明の光硬化型粘着剤に、必要に応じ、粘着剤組成全体100重量部に対して、0.00 Furthermore, the photocurable pressure-sensitive adhesive of the present invention, if necessary, with respect to the total adhesive composition 100 parts by weight, 0.00
1〜5重量部程度の多官能アクリル(メタクリル)系モノマーなどの光重合性化合物を添加しても良い。 A photopolymerizable compound such as a polyfunctional acrylic of about 1 to 5 parts by weight (meth) monomers may be added. このような光重合性化合物としては、ヘキサンジオールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ) Such photopolymerizable compound, hexanediol di (meth) acrylate, neopentyl glycol di (meth)
アクリレート、ペンタエリスリトールジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、ジペンタエロスリトールヘキサ(メタ)アクリレート、ポリエチレングリコールジ(メタ)アクリレート、ポリプロピレングリコールジ(メタ)アクリレート、エポキシアクリレート、ポリエステルアクリレート、ウレタンアクリレートなどが挙げられる。 Acrylate, pentaerythritol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol Eros lithol hexa (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, epoxy acrylate, polyester acrylate, urethane acrylate, and the like.

【0024】また、本発明の感圧性両面接着テープを作製する上記光硬化型粘着剤には、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。 Further, in the photocurable pressure-sensitive adhesive to produce a pressure-sensitive double-sided adhesive tape of the present invention is usually rosin-based resin, such as those used in the acrylic resin, terpene resin, a tackifier such as petroleum resin it may be added.

【0025】更に、本発明の光硬化型粘着剤には、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。 Furthermore, the photocurable pressure-sensitive adhesive of the present invention, thickeners, thixotropic agents, may be added usual compounding agents used, such as fillers. 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(アエロジル300 As the thickener, acrylic rubber, epichlorohydrin rubber and the like. Examples of the thixotropic agent, ultrafine silica (Aerosil 300
など)が挙げられる。 And the like). 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、ガラスバルーン、アルミナバルーン等の無機中空粒子、アクリルバルーン、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、 As the filler, calcium carbonate, titanium dioxide, inorganic particles such as silicon dioxide, nylon beads, acrylic beads, organic particles such as silicone beads, glass balloons, inorganic hollow particles such as alumina balloons, acrylic balloon, vinylidene chloride balloon and the like organic hollow particles, polyester, nylon, rayon,
ガラス等の有機又は無機系短繊維等が挙げられる。 Organic or inorganic short fibers such as glass. これらは、粘着テープの機械的特性(応力緩和性など)等を改善する為に加えられ、光硬化性等を阻害しない範囲で使用される。 These are added to improve the mechanical properties of the adhesive tape (stress relaxation, etc.) or the like, is used within a range that does not inhibit the photocurable like.

【0026】次に、本発明の粘着テープを製造する方法について説明する。 Next, a method for producing a pressure-sensitive adhesive tape of the present invention.

【0027】まず、剥離処理を施したポリエステルフィルム、延伸ポリプロピレンフィルム等のシート基材上に、前記した光硬化型粘着剤を塗工し、1層目の粘着剤層を得る。 Firstly, a polyester film subjected to release treatment, on a sheet substrate such as stretched polypropylene film, coating a photocurable adhesive described above, to obtain a first layer of pressure-sensitive adhesive layer. その上にテープの基材層となる光硬化型粘着剤を塗工し、2層目の基材層を得る。 Coating a photocurable adhesive which is a tape base layer thereon to obtain a second layer of the base layer. 上記基材層となる光硬化型粘着剤としては、1層目の上記粘着剤層となる光硬化型粘着剤にガラスバルーン、アルミナバルーン等の無機中空粒子、アクリルバルーン、塩化ビニリデンバルーン等の有機中空粒子、超微粉シリカ等を添加し、増粘した組成物が望ましい。 The photocurable pressure-sensitive adhesive which becomes the base layer, glass balloon photocurable adhesive which becomes the first layer of the pressure-sensitive adhesive layer, inorganic hollow particles such as alumina balloons, acrylic balloon, organic such as vinylidene chloride balloons hollow particles, the addition of ultrafine silica, thickened compositions are desirable. その基材層の上に、3層目の粘着剤層を形成する。 Over the base layer, forming a third layer of pressure-sensitive adhesive layer. この場合、通常、1層目の粘着剤層に使用した光硬化型粘着剤が使用される。 In this case, usually, light-curable adhesive used in the first layer of pressure-sensitive adhesive layer is used. 次に、光源より紫外線を照射し、前記した3層を同時に光硬化させて粘着テープを得る。 Then, ultraviolet rays are irradiated from the light source to obtain a pressure-sensitive adhesive tape simultaneously photocured three layers described above. この場合、テープの上下から光照射することが硬化反応を均一に起こさせる上で好ましい。 In this case, preferable in it to uniformly cause a curing reaction to light irradiation from the top and bottom of the tape.

【0028】塗工方法については、特に限定されず、通常の塗工方法であるロールコーター、ダイコーター等が使用される。 [0028] The coating method is not particularly limited, a roll coater is a conventional coating method, a die coater or the like is used. また、薄く塗工する場合には、グラビアコーター等も使用できる。 Further, in the case of coating thin, gravure coater or the like can be used. 通常、塗工する膜厚に応じて、 Usually, depending on the thickness of the coating,
光硬化型粘着剤の粘度を調節して塗工する。 Adjust the viscosity of the photocurable pressure-sensitive adhesive to a coating.

【0029】これらの光硬化型粘着剤が硬化する際、空気中の酸素や粘着剤に溶存する酸素により硬化反応が阻害される為、十分に窒素ガス等の不活性ガスで置換された雰囲気で光照射されるか、保護フィルムを介して光照射される。 [0029] When these light curable adhesive is cured, because the curing reaction by oxygen dissolved oxygen or a pressure-sensitive adhesive in the air is inhibited, in an atmosphere substituted with an inert gas such as sufficiently nitrogen gas either irradiated with light, is irradiated with light through the protective film. 酸素による硬化阻害を抑える為に、オクタン酸第一スズ、トリイソデシルフォスファイト等の除酸素効果のあるスズ塩化合物やリン系化合物等を添加しても良い。 In order to suppress the curing inhibition by oxygen, stannous octoate, may be added triisodecyl phosphite tin salt compound of removing oxygen effect such as phosphite or phosphorus compounds and the like.

【0030】粘着テープの光硬化の際に使用される光源としては、波長250〜450nmの光を出すランプが望ましく、ケミカルランプ、ブラックライト、低圧水銀灯などが挙げられる。 [0030] As the light source used in the photocuring of the adhesive tape, the lamp is desirable to produce a light having a wavelength of 250 to 450 nm, a chemical lamp, a black light, and a low-pressure mercury lamp. また、使用される光強度は、高分子量のアクリル重合体を得るために、通常、365nm Further, the light intensity used in order to obtain an acrylic polymer of high molecular weight, typically, 365 nm
における紫外線強度が0.1〜10mW/cm 2程度の比較的低い紫外線強度で使用されることが望ましい。 UV intensity in the is desirably used at relatively low UV intensity of about 0.1 to 10 MW / cm 2.

【0031】以下に、本発明の感圧性両面接着テープの製造方法を具体的に説明する。 [0031] The following describes a pressure-sensitive double-sided adhesive tape manufacturing method of the present invention in detail. 但し、本発明の感圧性両面接着テープはこの方法によって製造されるものに限らない。 However, pressure-sensitive double-sided adhesive tape of the present invention is not limited to those produced by this method. まず、粘着剤層、基材層および粘着剤層の3層構造からなる粘着テープの1層目と3層目の粘着剤層となる粘着剤組成物を得るために、(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を所定の配合量で混合し、それに光活性官能基を有するアクリル系高分子量体と光重合開始剤を所定量添加し、十分に撹拌・混合し、均一な粘着剤溶液を得る。 First, the pressure-sensitive adhesive layer, in order to obtain a pressure-sensitive adhesive composition comprising a first layer of pressure-sensitive adhesive tape having a three-layer structure of the base layer and the adhesive layer and the third layer of pressure-sensitive adhesive layer, (meth) acrylic acid alkyl the ester monomer and the polar group-containing monomer were mixed at a predetermined amount, it was added a predetermined amount of acrylic high polymer and a photopolymerization initiator having a photoactive functional group, sufficiently stirred and mixed to obtain a homogeneous adhesive solution. この際、粘着剤溶液の25℃における粘度が1,000〜10,000c In this case, a viscosity at 25 ° C. of the adhesive solution 1,000~10,000c
pであることが塗工上好ましい。 It is the coating preferably is p. その粘度は塗工する膜厚に応じて調整される。 The viscosity is adjusted according to the thickness of coating. また、必要に応じて上記した粘着剤溶液に、先に記載した多官能(メタ)アクリル系モノマー、チキソトロピー剤などを添加しても良い。 Further, the pressure-sensitive adhesive solution described above may optionally be added polyfunctional (meth) acrylic monomers mentioned above, and thixotropic agents.

【0032】また、3層構造からなる粘着テープの2層目の基材層となる基材層組成物を得るために、(メタ) Further, in order to obtain a base layer composition comprising a second layer of the base layer of the adhesive tape consisting of three-layer structure, (meth)
アクリル酸アルキルエステル単量体、極性基含有単量体、光活性官能基を有するアクリル系高分子量体、光重合開始剤及びガラスバルーン等の無機中空粒子等を所定の配合量で混合し、十分に撹拌・混合し、均一な基材層組成物を得る。 Alkyl ester monomers of acrylic acid, the polar group-containing monomer, acrylic high polymer having a photoactive functional group, inorganic hollow particles such as photopolymerization initiator and glass balloon and the like are mixed in predetermined amounts, sufficient stirred and mixed to obtain a uniform base layer composition. 基材層は、テープに応力緩和性などを付与する為に、上記粘着剤層に比べて厚く塗工する必要があり、上記基材層組成物の25℃におけける粘度が2, Substrate layer, in order to impart such stress relaxation properties to the tape, it is necessary to increase the thickness of coating as compared with the PSA layer, put Keru viscosity 25 ° C. of the base layer composition is 2,
000〜30,000cpであることが塗工上好ましい。 It is the coating preferably 000~30,000Cp. その粘度は塗工する膜厚に応じて調整される。 The viscosity is adjusted according to the thickness of coating. また、必要に応じてこの上記基材層組成物に、先に記載した多官能(メタ)アクリル系モノマー、チキソトロピー剤などを添加しても良い。 Further, in the above base layer composition may optionally be added polyfunctional (meth) acrylic monomers mentioned above, and thixotropic agents.

【0033】このようにして作製した粘着剤組成物及び基材層組成物を用いて3層構造からなる感圧性両面接着テープを作製する方法について、以下説明する。 The method for manufacturing a pressure-sensitive double-sided adhesive tape having a three-layer structure using this manner the pressure-sensitive adhesive composition was prepared and the substrate layer compositions are described below.

【0034】まず、剥離処理を施したポリエステルフィルム等のシート基材上に上記した粘着剤組成物をコンマコーター法で塗工し、通常、10〜100μm程度の所定の膜厚を得る。 [0034] First, a pressure-sensitive adhesive composition described above on a sheet substrate of a polyester film or the like which has been subjected to release treatment was coated by a comma coater method, usually to obtain a predetermined thickness of about 10 to 100 [mu] m. その上に、上記基材層組成物をダイコーターで塗工し、通常、50〜2,000μm程度の所定の膜厚を得る。 Thereon, and coating the base layer composition die coater generally obtain a predetermined thickness of about 50~2,000Myuemu. その上に、上記粘着剤組成物をコンマコーター法で塗工し、通常、10〜100μm程度の所定の膜厚を得る。 Thereon, the pressure-sensitive adhesive composition was coated by a comma coater method, usually to obtain a predetermined thickness of about 10 to 100 [mu] m. このようにして形成した3層構造からなる粘着層に窒素雰囲気下でブラックライトを用いて、 With black light in a nitrogen atmosphere to the adhesive layer having a three-layer structure formed in this manner,
365nmにおける紫外線強度が約1mW/cm 2の紫外線を20秒間〜5分間照射し、3層を同時に硬化させ、シート基材を分離し、感圧性両面接着テープを得る。 Ultraviolet UV intensity of about 1 mW / cm 2 was irradiated for 20 seconds to 5 minutes at 365 nm, to cure three layers simultaneously, to separate the sheet substrate, to obtain a pressure-sensitive double-sided adhesive tape. 本発明の感圧性両面接着テープはこのようにして得られ、本テープを被着体に貼り合わせた場合、優れた接着性と耐熱性を示す。 Pressure-sensitive double-sided adhesive tape of the present invention is obtained in this way, when bonded to the tape to the adherend, it exhibits excellent adhesion properties and heat resistance.

【0035】 [0035]

【発明の実施の形態】本発明の感圧性両面接着テープ及びその製造方法について実施の形態の実施例によって具体的に説明する。 DETAILED DESCRIPTION OF THE INVENTION be described pressure-sensitive double-sided adhesive tape and its manufacturing method in examples specific embodiment for the present invention. 但し、本発明の感圧性両面接着テープ及びその製造方法はこれに限定されるものではない。 However, pressure-sensitive double-sided adhesive tape and its manufacturing method of the present invention is not limited thereto. なお、実施の形態の実施例及び比較例の記述中における「部」は重量部を表す。 Incidentally, "parts" in the description of the examples and comparative examples of the embodiment are by weight.

【0036】[実施例1]アクリル酸2−エチルヘキシル63部、アクリル酸7部に、重量平均分子量が70万で、光活性官能基含有量が0.01ミリ当量/gのアクリル酸2−エチルヘキシルを主成分とするアクリル系高分子量体30部及びイルガキュア1850(チバガイギー社)0.5部を添加し、十分に混合し、25℃における粘度が3,000cpの均一な粘着剤組成物を得た。 [0036] [Example 1] 2-ethylhexyl 63 parts of acrylic acid, 7 parts of acrylic acid, a weight average molecular weight of 700,000, a photoactive functional group content of 0.01 meq / g 2-ethylhexyl acrylate It was added acrylic high molecular weight 30 parts of Irgacure 1850 (Ciba-Geigy) 0.5 parts of a main component, thoroughly mixed, the viscosity at 25 ° C. was obtained a homogeneous adhesive composition 3,000cp .

【0037】また、同様に、アクリル酸2−エチルヘキシル65部、アクリル酸5部に、重量平均分子量が70 [0037] Similarly, 65 parts of 2-ethylhexyl acrylate, 5 parts of acrylic acid, the weight average molecular weight of 70
万で、光活性官能基含有量が0.01ミリ当量/gのアクリル酸2−エチルヘキシルを主成分とするアクリル系高分子量体30部、イルガキュア1850(チバガイギー社)0.5部及び平均粒径が約50μm、比重が0. In ten thousand, acrylic high polymer 30 parts of photoactive functional group content is the main component of 0.01 meq / g 2-ethylhexyl acrylate, Irgacure 1850 (Ciba-Geigy) 0.5 parts and the average particle size but about 50μm, specific gravity is 0.
15の中空ガラスビーズ50部を添加し、十分に混合し、均一な基材層組成物を得た。 Was added hollow glass beads 50 parts of 15 were mixed sufficiently to obtain a uniform base layer composition.

【0038】次に、剥離処理を施した50μm厚のポリエステルフィルム上に上記粘着剤組成物を50μm厚に塗工し、その上に上記基材層組成物を500μm厚に塗工し、最後に上記粘着剤組成物を50μm厚に塗工した。 Next, the pressure-sensitive adhesive composition on a polyester film 50μm thick was subjected to a release treatment was applied to 50μm thick, the base layer composition was applied to a 500μm thick thereon, finally It was coated with the PSA composition to 50μm thick. これに、窒素雰囲気下でブラックライトを用いて、 To this, by using a black light under a nitrogen atmosphere,
365nmにおける紫外線強度が1mW/cm 2の紫外線を上下から2分間照射し、3層構造からなる感圧性両面接着テープを得た。 UV intensity was irradiated for two minutes with ultraviolet rays of 1 mW / cm 2 from above and below in the 365 nm, to obtain a pressure-sensitive double-sided adhesive tape having a three-layer structure. この粘着テープのステンレス板に対する粘着力は6kgf/25mmであり、剪断接着力は8kgf/cm 2であった。 Adhesive strength to a stainless steel plate of the adhesive tape is 6 kgf / 25 mm, shear bond strength was 8 kgf / cm 2. また、180℃/1時間における剪断保持力試験(荷重:1kg)を行なったが、ずれや落下は認められず、優れた粘着性、接着性、 Further, the shear holding power test at 180 ° C. / 1 ​​hr (load: 1 kg) was performed, shift or fall was not observed and excellent adhesion, adhesion,
及び耐熱性を示した。 And exhibited heat resistance.

【0039】[実施例2]アクリル酸イソオクチル65 [0039] [Example 2] isooctyl acrylate 65
部、アクリル酸5部に、重量平均分子量が70万で、光活性官能基含有量が0.01ミリ当量/gのアクリル酸2−エチルヘキシルを主成分とするアクリル系高分子量体30部及びイルガキュア1850(チバガイギー社) Parts, 5 parts of acrylic acid, a weight average molecular weight of 700,000, an acrylic high molecular weight 30 parts of Irgacure photoactive functional group content is the main component of 0.01 meq / g 2-ethylhexyl acrylate 1850 (Ciba-Geigy)
0.5部を添加し、十分に混合し、25℃における粘度が2,500cpの均一な粘着剤組成物を得た。 Was added 0.5 parts thoroughly mixed, the viscosity at 25 ° C. was obtained a homogeneous adhesive composition 2,500Cp.

【0040】また、同様に、アクリル酸2−イソオクチル65部、アクリル酸5部に、重量平均分子量が70万で、光活性官能基含有量が0.01ミリ当量/gのアクリル酸2−エチルヘキシルを主成分とするアクリル系高分子量体30部、イルガキュア1850(チバガイギー社)0.5部及び平均粒径が約50μm、比重が0.1 [0040] Similarly, 2-isooctyl 65 parts of acrylic acid, 5 parts of acrylic acid, a weight average molecular weight of 700,000, a photoactive functional group content of 0.01 meq / g 2-ethylhexyl acrylate acrylic high polymer 30 parts mainly composed of Irgacure 1850 (Ciba-Geigy) 0.5 parts of an average particle size of about 50 [mu] m, a specific gravity of 0.1
5の中空ガラスビーズ100部を添加し、十分に混合し、均一な基材層組成物を得た。 100 parts of hollow glass beads 5 was added, thoroughly mixed to obtain a uniform base layer composition.

【0041】次に、剥離処理を施した50μm厚のポリエステルフィルム上に上記粘着剤組成物を60μm厚に塗工し、その上に上記基材層組成物を800μm厚に塗工し、最後に上記粘着剤組成物を60μm厚に塗工した。 Next, the pressure-sensitive adhesive composition on a polyester film 50μm thick was subjected to a release treatment was applied to 60μm thick, it was applied to the substrate layer composition thereon to 800μm thickness, finally It was coated with the PSA composition to 60μm thick. これに、窒素雰囲気下でブラックライトを用いて、 To this, by using a black light under a nitrogen atmosphere,
365nmにおける紫外線強度が1mW/cm 2の紫外線を上下から3分間照射し、3層構造からなる感圧性両面接着テープを得た。 UV intensity was irradiated for 3 minutes with ultraviolet rays of 1 mW / cm 2 from above and below in the 365 nm, to obtain a pressure-sensitive double-sided adhesive tape having a three-layer structure. この粘着テープのステンレス板に対する粘着力は8kgf/25mmであり、剪断接着力は10kgf/cm 2であった。 Adhesive strength to a stainless steel plate of the adhesive tape is 8 kgf / 25 mm, shear bond strength was 10 kgf / cm 2. また、180℃/1時間における剪断保持力試験(荷重:1kg)を行なったが、ずれや落下は認められず、優れた粘着性、接着性、 Further, the shear holding power test at 180 ° C. / 1 ​​hr (load: 1 kg) was performed, shift or fall was not observed and excellent adhesion, adhesion,
及び耐熱性を示した。 And exhibited heat resistance.

【0042】[実施例3〜10]実施例1、2の場合と同様にして、表1及び表2に示すような組成、作製条件で3層構造からなる感圧性両面接着テープを作製した。 [0042] [Example 3-10] In the same manner as in Example 1, compositions shown in Table 1 and Table 2, to prepare a pressure-sensitive double-sided adhesive tape having a three-layer structure in manufacturing conditions.
なお、表1及び表2において、光重合開始剤は、すべてイルガキュア1650、0.5部を使用した。 In Table 1 and Table 2, the photopolymerization initiator, using all Irgacure 1650,0.5 parts. この感圧性両面接着テープの粘着力、剪断接着力、剪断保持力の測定結果を表3に示すが、いずれも優れた粘着・接着特性及び耐熱性を示した。 Adhesive force of the pressure-sensitive double-sided adhesive tape, shear adhesion, the measurement results of the shear holding power are shown in Table 3 all showed good adhesive and bonding properties and heat resistance. また、粘着テープ・シートを作製する際の塗工性、成膜性なども良好であった。 Further, the coating of making the pressure-sensitive adhesive tape sheets was good such as film forming property.

【0043】 [0043]

【表1】 [Table 1]

【0044】 [0044]

【表2】 [Table 2]

【0045】 [0045]

【表3】 [Table 3]

【0046】[比較例1]アクリル酸2−エチルヘキシル63部、アクリル酸7部に、重量平均分子量が70万で、光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高分子量体30部及びイルガキュア1850(チバガイギー社)0.5部を添加し、十分に混合し、25℃における粘度が3,000 [0046] [Comparative Example 1] 2-ethylhexyl 63 parts of acrylic acid, 7 parts of acrylic acid, a weight average molecular weight is 700,000, the acrylic high mainly composed of 2-ethylhexyl acrylate containing no photoactive functional group was added molecular weight 30 parts of Irgacure 1850 (Ciba-Geigy) 0.5 parts were mixed thoroughly, 3,000 viscosity at 25 ° C.
cpの均一な粘着剤組成物を得た。 To obtain a homogeneous adhesive composition cp.

【0047】また、同様に、アクリル酸2−エチルヘキシル65部、アクリル酸5部に、重量平均分子量が70 [0047] Similarly, 65 parts of 2-ethylhexyl acrylate, 5 parts of acrylic acid, the weight average molecular weight of 70
万で、光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高分子量体30部、 In ten thousand, acrylic high polymer 30 parts mainly composed of 2-ethylhexyl acrylate containing no photoactive functional group,
イルガキュア1850(チバガイギー社)0.5部及び平均粒径が約50μm、比重が0.15の中空ガラスビーズ50部を添加し、十分に混合し、均一な基材層組成物を得た。 Irgacure 1850 (Ciba-Geigy) 0.5 parts of an average particle size of about 50 [mu] m, a specific gravity added hollow glass beads 50 parts of 0.15 were mixed sufficiently to obtain a uniform base layer composition.

【0048】次に、剥離処理を施した50μm厚のポリエステルフィルム上に上記粘着剤組成物を50μm厚に塗工し、その上に上記基材層組成物を500μm厚に塗工し、最後に上記粘着剤組成物を50μm厚に塗工した。 Next, the pressure-sensitive adhesive composition on a polyester film 50μm thick was subjected to a release treatment was applied to 50μm thick, the base layer composition was applied to a 500μm thick thereon, finally It was coated with the PSA composition to 50μm thick. これに、窒素雰囲気下でブラックライトを用いて、 To this, by using a black light under a nitrogen atmosphere,
365nmにおける紫外線強度が1mW/cm 2の紫外線を上下から2分間照射し、3層構造からなる感圧性両面接着テープを得た。 UV intensity was irradiated for two minutes with ultraviolet rays of 1 mW / cm 2 from above and below in the 365 nm, to obtain a pressure-sensitive double-sided adhesive tape having a three-layer structure. この粘着テープのステンレス板に対する粘着力は6kgf/25mmであり、剪断接着力は6kgf/cm 2であった。 Adhesive strength to a stainless steel plate of the adhesive tape is 6 kgf / 25 mm, shear bond strength was 6 kgf / cm 2. また、80℃や180℃ In addition, 80 ℃ and 180 ℃
における剪断保持力試験(荷重:1kg)を行なったが、いずれも、10分以内で落下し、保持力や耐熱性に劣ることが分かった。 Shear holding power test (load: 1 kg) in was carried out both, fall within 10 min, it was found to be inferior to the holding power and heat resistance.

【0049】 [0049]

【発明の効果】本発明により、高粘着性と高耐熱性とを両立し、かつ、塗工性や光硬化性などに優れる為に、量産性良く感圧性両面接着テープ・シートを製造することができる。 Effect of the Invention] The present invention, to achieve both high tack and high heat resistance, and, in order to excellent like coatability and photocurable, to produce a high mass productivity pressure-sensitive double-sided adhesive tape Sheet can.

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 AB01 AB07 CA03 CB03 CC02 CD09 DA02 DA03 EA05 FA08 4J027 AA02 AB03 AC03 AC04 AC06 AE01 AG01 AJ01 AJ04 AJ08 BA02 BA06 BA08 BA10 BA13 BA15 BA19 BA23 BA26 CA03 CA04 CA06 CA07 CA10 CA14 CA18 CA19 CA36 CA38 CB10 CC05 CD09 4J040 DF011 DF012 DF041 DF042 DF051 DF052 DF061 DF062 FA061 FA062 FA091 FA092 FA111 FA112 FA141 FA142 FA191 FA192 GA02 HA136 HA346 HB13 HB16 HB19 HC09 HD23 JA09 JB08 JB09 KA03 KA05 KA13 LA01 LA05 LA06 LA08 LA11 Front page of the continuation (72) inventor virtuoso Kazuo Kawasaki City, Kanagawa Prefecture Tama-ku, Noborito 3819 address stock company SLIONTEC in the F-term (reference) 4J004 AA10 AB01 AB07 CA03 CB03 CC02 CD09 DA02 DA03 EA05 FA08 4J027 AA02 AB03 AC03 AC04 AC06 AE01 AG01 AJ01 AJ04 AJ08 BA02 BA06 BA08 BA10 BA13 BA15 BA19 BA23 BA26 CA03 CA04 CA06 CA07 CA10 CA14 CA18 CA19 CA36 CA38 CB10 CC05 CD09 4J040 DF011 DF012 DF041 DF042 DF051 DF052 DF061 DF062 FA061 FA062 FA091 FA092 FA111 FA112 FA141 FA142 FA191 FA192 GA02 HA136 HA346 HB13 HB16 HB19 HC09 HD23 JA09 JB08 JB09 KA03 KA05 KA13 LA01 LA05 LA06 LA08 LA11

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】粘着剤層、基材層および粘着剤層の3層の各構造すべてを(メタ)アクリル酸アルキルエステル単量体、極性基含有単量体、光活性官能基を有するアクリル系高分子量体および光重合開始剤を主成分とする光硬化型粘着剤を用いて作製した感圧性両面接着テープにおいて、上記光活性官能基を有するアクリル系高分子量体が、20万〜300万の重量平均分子量を有し、かつ、 1. A pressure-sensitive adhesive layer, all the structures of the three layers of the base layer and the adhesive layer (meth) acrylic acid alkyl ester monomer, the polar group-containing monomer, an acrylic having a photoactive functional group in pressure-sensitive double-sided adhesive tape produced by using the photocurable pressure-sensitive adhesive composed mainly of high molecular weight and a photopolymerization initiator, an acrylic high polymer having the photoactive functional group, of from 200,000 to 3,000,000 It has a weight average molecular weight, and,
    上記光活性官能基の含有量が0.001〜0.5ミリ当量/gであることを特徴とする感圧性両面接着テープ。 Pressure-sensitive double-sided adhesive tape in which the content of the photoactive functional group, characterized in that 0.001 to 0.5 meq / g.
  2. 【請求項2】上記粘着剤層を形成する粘着剤が上記(メタ)アクリル酸アルキルエステル単量体、上記極性基含有単量体、上記光活性官能基を有するアクリル系高分子量体および上記光重合開始剤を主成分とする光硬化型粘着剤であり、上記基材層を形成する粘着剤が上記粘着剤層を形成する粘着剤に無機中空粒子を添加してなる光硬化型粘着剤であることを特徴とする請求項1記載の感圧性両面接着テープ。 Wherein said forming an adhesive layer adhesive above (meth) acrylic acid alkyl ester monomer, the polar group-containing monomer, an acrylic high molecular weight and the light having the photoactive functional group a photocurable adhesive composed mainly of an polymerization initiator, a light-curable adhesive which pressure-sensitive adhesive forming the base layer is formed by addition of inorganic hollow particles in the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer pressure-sensitive double-sided adhesive tape according to claim 1, wherein there.
  3. 【請求項3】シート基材上に、請求項2記載の上記光硬化型粘着剤を用いて、上記粘着剤層、上記基材層、上記粘着剤層を順次塗工し、光照射により上記粘着剤層、上記基材層および上記粘着剤層を同時に硬化させて作製した上記3層構造からなることを特徴とする感圧性両面接着テープの製造方法。 To 3. A sheet substrate on, by using the photocurable pressure-sensitive adhesive of claim 2, wherein the pressure-sensitive adhesive layer, the substrate layer, sequentially coating the pressure-sensitive adhesive layer, the irradiated with light pressure-sensitive adhesive layer, the manufacturing method of the pressure-sensitive double-sided adhesive tape, characterized by comprising the above three-layer structure was produced by the base layer and curing the pressure-sensitive adhesive layer at the same time.
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