JP2007106812A - Pressure-sensitive adhesive sheet - Google Patents

Pressure-sensitive adhesive sheet Download PDF

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JP2007106812A
JP2007106812A JP2005297135A JP2005297135A JP2007106812A JP 2007106812 A JP2007106812 A JP 2007106812A JP 2005297135 A JP2005297135 A JP 2005297135A JP 2005297135 A JP2005297135 A JP 2005297135A JP 2007106812 A JP2007106812 A JP 2007106812A
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pressure
sensitive adhesive
adhesive layer
vinyl acetate
base material
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Shunji Ichikawa
俊二 市川
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BESPACK KK
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Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the trouble of residual adhesive layer left on a screen printing plate in the case of pasting a pressure-sensitive sheet to a screen printing plate and peeling the sheet from the plate. <P>SOLUTION: The pressure-sensitive adhesive sheet 1 has an adhesive layer 3 laminated on a substrate 2 composed of a thermoplastic resin such as a low-density polyethylene. The adhesive layer 3 is formed by the extrusion lamination on a filmy substrate 2 or by the coextrusion of the adhesive layer 3 and the substrate 2. The adhesive layer 3 is made of e.g. a saponified ethylene-vinyl acetate copolymer or a composition composed of a saponified ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate copolymer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えばスクリーン印刷版の開口に目詰まりしたり裏回りして付着する印刷ペーストを除去する粘着シートに関する。   The present invention relates to a pressure-sensitive adhesive sheet that removes, for example, a printing paste that clogs or adheres to the opening of a screen printing plate.

従来、スクリーン印刷版の開口に目詰まりする印刷ペーストや裏回りして付着する印刷ペーストを除去する粘着シートが知られており、斯様な粘着シートの公知技術文献として特許文献１〜４がある。   Conventionally, there is known an adhesive sheet that removes a printing paste that clogs an opening of a screen printing plate or a printing paste that adheres behind the screen, and Patent Documents 1 to 4 are known technical documents of such an adhesive sheet. .

特許文献１には、基材と、基材の片面に塗布して形成されたアクリル系粘着剤などの粘着剤層とで構成され、使用前の粘着力を１〜４００ｇｆ／２５ｍｍ、スクリーン印刷インキ用溶剤に１秒間浸漬した時の粘着剤層の該溶剤吸収量を５ｇ／ｍ２以上、該溶剤を５ｇ／ｍ２吸収した後の粘着力を１ｇｆ／２５ｍｍ以上とする粘着シートが開示されている。 Patent Document 1 includes a base material and an adhesive layer such as an acrylic pressure-sensitive adhesive formed on one side of the base material. The adhesive strength before use is 1 to 400 gf / 25 mm, screen printing ink. An adhesive sheet is disclosed in which the solvent absorption of the adhesive layer when immersed in a solvent for 1 second is 5 g / m 2 or more, and the adhesive strength after absorbing the solvent is 5 g / m 2 is 1 gf / 25 mm or more. Yes.

特許文献２には、基材と、基材の片面に塗布して形成された粘着剤層とで構成され、粘着剤層が平均粒径０．０１〜１０μｍの微粒子を含有し、粘着力を４Ｎ／２５ｍｍ以下とする粘着シートが開示されている。   Patent Document 2 is composed of a base material and a pressure-sensitive adhesive layer formed by applying to one side of the base material, the pressure-sensitive adhesive layer contains fine particles having an average particle size of 0.01 to 10 μm, and has an adhesive strength. A pressure-sensitive adhesive sheet of 4N / 25 mm or less is disclosed.

特許文献３には、基材と、基材の一方の片面に塗布して形成された粘着剤層とで構成され、基材の他方の片面が背面処理剤で背面処理された剥離面になっており、剥離面に対する粘着剤層の粘着力における最大平均値と最小平均値との差が１．０Ｎ／５０ｍｍ以下である粘着シートが開示されている。   Patent Document 3 is composed of a base material and a pressure-sensitive adhesive layer formed by applying to one side of the base material, and the other side of the base material is a release surface that has been back-treated with a back surface treatment agent. A pressure-sensitive adhesive sheet is disclosed in which the difference between the maximum average value and the minimum average value of the adhesive strength of the pressure-sensitive adhesive layer to the release surface is 1.0 N / 50 mm or less.

特許文献４には、基材と、基材の一方の片面に塗布して形成された粘着剤層とで構成され、基材の他方の片面が背面処理剤で背面処理された剥離面になっており、剥離面に粘着剤層が重ね合わせられてプラスチック製の巻芯にロール状に巻回されている粘着シートが開示されている。   Patent Document 4 is composed of a base material and a pressure-sensitive adhesive layer formed by applying to one side of the base material, and the other side of the base material is a release surface that is back-treated with a back surface treatment agent. A pressure-sensitive adhesive sheet is disclosed in which a pressure-sensitive adhesive layer is superposed on a release surface and wound in a roll shape on a plastic core.

特開２０００−１７７１１０号公報JP 2000-177110 A 特開２００１−１９９０５３号公報JP 2001-199053 A 特開２００３−３１１２１９号公報Japanese Patent Laid-Open No. 2003-311219 特開２００３−３１１９３４号公報JP 2003-31934 A

ところで、上記特許文献１〜４の粘着シートの粘着剤層は基材に塗工して形成されたものであるが、基材に塗工された粘着剤層は基材と粘着剤層との固着力に弱さやバラツキが生ずるため、粘着シートをスクリーン印刷版に貼り付けて剥がす際に、粘着剤層が部分的にスクリーン印刷版に付着して残ってしまうという問題がある。斯様な粘着剤層の残存は却ってスクリーン印刷版の汚れを増大してしまう。   By the way, the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheets of Patent Documents 1 to 4 is formed by coating on a base material, but the pressure-sensitive adhesive layer applied to the base material is composed of a base material and a pressure-sensitive adhesive layer. Since the fixing force is weak and uneven, there is a problem that when the adhesive sheet is attached to the screen printing plate and peeled off, the adhesive layer partially adheres to the screen printing plate and remains. Such remaining adhesive layer increases the stain on the screen printing plate.

本発明は上記課題に鑑み提案するものであって、基材と粘着剤層との固着力がバラツキ無く強く安定しており、粘着シートを貼り付けて剥がす際に粘着剤層が付着することが無い粘着シートを提供することを目的とする。   The present invention is proposed in view of the above problems, and the adhesive force between the base material and the pressure-sensitive adhesive layer is strong and stable without variation, and the pressure-sensitive adhesive layer may adhere when the pressure-sensitive adhesive sheet is attached and peeled off. It aims at providing the adhesive sheet which does not have.

本発明の粘着シートは、熱可塑性樹脂の基材上に粘着剤層が積層され、該粘着剤層がフィルム状の基材上への押出ラミネート成形により形成、若しくは該粘着剤層が基材との共押出成形により形成されていることを特徴とする。   In the pressure-sensitive adhesive sheet of the present invention, a pressure-sensitive adhesive layer is laminated on a thermoplastic resin base material, and the pressure-sensitive adhesive layer is formed by extrusion lamination molding on a film-like base material, or the pressure-sensitive adhesive layer is formed with a base material. It is formed by co-extrusion molding.

また、本発明の粘着シートは、熱可塑性樹脂の基材上にアンカー層と粘着剤層が順に積層され、該粘着剤層がフィルム状の基材に形成されたアンカー層上に押出ラミネート成形により形成され、若しくは該粘着剤層が基材とアンカー層との共押出成形により形成されていることを特徴とする。   In the pressure-sensitive adhesive sheet of the present invention, an anchor layer and a pressure-sensitive adhesive layer are sequentially laminated on a thermoplastic resin substrate, and the pressure-sensitive adhesive layer is formed by extrusion lamination molding on the anchor layer formed on a film-shaped substrate. The pressure-sensitive adhesive layer is formed or formed by coextrusion molding of a base material and an anchor layer.

そして、本発明の粘着シートに於いて、その粘着剤層には、スクリーン印刷版に付着した印刷ペースト等の汚れを除去できるなど適度な粘着力を有する適宜の素材を用いることが可能であり、例えばケン化エチレン酢酸ビニル共重合体などエチレンビニルアルコール共重合体（ＥＶＯＨ）、若しくはケン化エチレン酢酸ビニル共重合体などエチレンビニルアルコール共重合体（ＥＶＯＨ）とエチレン酢酸ビニル共重合体（ＥＶＡ）との組成物、若しくはケン化アルキル（メタ）アクリレート、若しくはケン化アルキル（メタ）アクリレートとアルキル（メタ）アクリレートとの組成物とすると好適である。更に、基材上に直接粘着剤層を積層する場合には、基材の素材と接着力が良好な素材を用いる。   And in the pressure-sensitive adhesive sheet of the present invention, it is possible to use an appropriate material having an appropriate pressure-sensitive adhesive force such as removal of dirt such as a printing paste attached to the screen printing plate in the pressure-sensitive adhesive layer, For example, ethylene vinyl alcohol copolymer (EVOH) such as saponified ethylene vinyl acetate copolymer, or ethylene vinyl alcohol copolymer (EVOH) such as saponified ethylene vinyl acetate copolymer and ethylene vinyl acetate copolymer (EVA) And a composition of saponified alkyl (meth) acrylate or saponified alkyl (meth) acrylate and alkyl (meth) acrylate. Furthermore, when laminating the pressure-sensitive adhesive layer directly on the substrate, a material having a good adhesive force with the material of the substrate is used.

また、基材の熱可塑性樹脂は、適宜の熱可塑性樹脂とすることが可能であり、例えばポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリエステル、エチレンアクリル酸エステル共重合体（ＥＥＡ）、若しくはエチレンビニルアセテート（ＥＶＡ）等を用いることができる。好適には押出成形温度が１７０℃〜２４０℃程度、より好適には１８０℃〜２３０℃程度の熱可塑性樹脂とするとよく、また、剛性は、ＪＩＳＫ７２１５による曲げ弾性率が１１０〜６００ＭＰａの柔軟性熱可塑性樹脂とすると操作性に好適である。   Moreover, the thermoplastic resin of the base material can be an appropriate thermoplastic resin, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyester, ethylene acrylate copolymer ( EEA) or ethylene vinyl acetate (EVA) can be used. Preferably, a thermoplastic resin having an extrusion molding temperature of about 170 ° C. to 240 ° C., more preferably about 180 ° C. to 230 ° C. is used, and the rigidity is a flexible heat whose bending elastic modulus according to JIS K7215 is 110 to 600 MPa. A plastic resin is suitable for operability.

また、アンカー層は、基材及び粘着剤層との接着性が良好な適宜の素材を用いることが可能であり、基材の素材と粘着剤層の素材に合わせて適宜の素材を用いる。例えば基材をポリプロピレン若しくはポリエチレンテレフタレートとし、粘着剤層をケン化エチレン酢酸ビニル共重合体とエチレン酢酸ビニル共重合体との組成物若しくはケン化エチレン酢酸ビニル共重合体とする場合に、アンカー層として例えばアドマー（三井化学製）、モディック（三菱化学製）などのエチレン無水マレイン酸の変性物等を用いることが可能である。   The anchor layer can be made of an appropriate material having good adhesion to the substrate and the pressure-sensitive adhesive layer, and an appropriate material is used in accordance with the material of the base material and the material of the pressure-sensitive adhesive layer. For example, when the base material is polypropylene or polyethylene terephthalate and the adhesive layer is a composition of saponified ethylene vinyl acetate copolymer and ethylene vinyl acetate copolymer or saponified ethylene vinyl acetate copolymer, the anchor layer For example, it is possible to use a modified product of ethylene maleic anhydride such as Admer (manufactured by Mitsui Chemicals) or Modic (manufactured by Mitsubishi Chemical).

また、粘着テープの離型機能に関し、基材を例えばポリエチレンなど基材自体を離型機能を有する樹脂で構成する他に、基材の粘着剤層を設ける側と反対側の片面に離型機能を有する樹脂で独立した離型層を押出ラミネート等により形成してもよい。離型層は例えばポリエチレンなど離型機能を有する適宜の素材で構成することが可能である。   In addition, regarding the release function of the adhesive tape, in addition to configuring the base material itself with a resin having a release function, such as polyethylene, the release function is provided on one side of the base opposite to the side where the adhesive layer is provided. An independent release layer may be formed by extrusion lamination or the like. The release layer can be composed of an appropriate material having a release function such as polyethylene.

尚、本発明の粘着シートは、スクリーン印刷版に貼り付けて印刷ペーストを除去する場合に用いると好適であるが、その他の用途に利用することも可能であり、例えばアクリル板・ポリカーボネート板・ＬＣＤ用偏光板などの被着板に貼り付け、切断・打抜き・工程内搬送・出荷輸送時などの表面保護に利用すると、安定した保護機能を発揮することができる。更に、表面保護に利用した後、スクリーン印刷版に貼り付けて印刷ペーストを除去することに再利用することもできる。また、本願の発明には、各発明の部分的な構成を他の構成に変更し、或いは各発明の構成に他の構成を付加し、或いは各発明の部分的な構成を部分的な作用効果が得られる限度で削除して上位概念化したものも含まれる。   The pressure-sensitive adhesive sheet of the present invention is preferably used when it is applied to a screen printing plate to remove the printing paste, but it can also be used for other purposes, such as an acrylic plate, a polycarbonate plate, and an LCD. Stable protection functions can be achieved by sticking to an adherend plate such as a polarizing plate and using it for surface protection during cutting, punching, in-process conveyance, shipping and transportation. Further, after being used for surface protection, it can be reused for removing the printing paste by pasting it on a screen printing plate. In addition, in the invention of the present application, the partial configuration of each invention is changed to another configuration, or another configuration is added to the configuration of each invention, or the partial configuration of each invention is partially functioned. It is also included as a superordinate concept by deleting as much as possible.

本発明の粘着シートは、基材と粘着剤層との固着力がバラツキ無く強く安定していることから、粘着シートを貼り付けて剥がす際に粘着剤層が付着することが無い。従って、例えば粘着シートをスクリーン印刷版に貼って剥がすことにより、スクリーン印刷版の汚れを確実に除去することができる。また、アクリル板・ポリカーボネート板・ＬＣＤ用偏光板などの被着板に貼り付けて保護フィルムとして用いた場合に、安定した保護機能を発揮することができる。   In the pressure-sensitive adhesive sheet of the present invention, the adhesive force between the substrate and the pressure-sensitive adhesive layer is strong and stable, and therefore, the pressure-sensitive adhesive layer does not adhere when the pressure-sensitive adhesive sheet is attached and peeled off. Therefore, for example, by sticking the adhesive sheet on the screen printing plate and peeling it off, the stain on the screen printing plate can be reliably removed. Further, when it is used as a protective film by being attached to an adherend plate such as an acrylic plate, a polycarbonate plate, or a polarizing plate for LCD, a stable protective function can be exhibited.

本発明の粘着シートについて実施形態に基づき説明する。   The pressure-sensitive adhesive sheet of the present invention will be described based on an embodiment.

先ず、第１実施形態の粘着シート１は、図１に示すように、熱可塑性樹脂の基材２上に粘着剤層３を積層して形成されており、基材２を構成する熱可塑性樹脂は例えば低密度ポリエチレン、粘着剤層３を構成する素材は例えばケン化エチレン酢酸ビニル共重合体、若しくはケン化エチレン酢酸ビニル共重合体とエチレン酢酸ビニル共重合体との組成物である。基材２に積層される粘着剤層３は、粘着剤層３がフィルム状の基材２上への押出ラミネートにより形成されるか、若しくは粘着剤層３を基材２と共に共押出成形することにより形成され、形成された積層フィルムは冷却ロールで冷却される。   First, as shown in FIG. 1, the pressure-sensitive adhesive sheet 1 of the first embodiment is formed by laminating a pressure-sensitive adhesive layer 3 on a thermoplastic resin base material 2, and the thermoplastic resin constituting the base material 2. Is a low density polyethylene, and the material constituting the pressure-sensitive adhesive layer 3 is, for example, a saponified ethylene vinyl acetate copolymer, or a composition of a saponified ethylene vinyl acetate copolymer and an ethylene vinyl acetate copolymer. The pressure-sensitive adhesive layer 3 laminated on the base material 2 is formed by extrusion lamination of the pressure-sensitive adhesive layer 3 onto the film-shaped base material 2, or the pressure-sensitive adhesive layer 3 is co-extruded together with the base material 2. The formed laminated film is cooled by a cooling roll.

粘着剤層３を基材２上へ押出ラミネートで形成する場合の具体例としては、例えば膜厚２５μｍ〜５０μｍの低密度ポリエチレンのフィルム（基材２）に、幅９０ｃｍのＴダイのダイス温度を１８０℃として、ケン化エチレン酢酸ビニル共重合体、若しくはケン化エチレン酢酸ビニル共重合体とエチレン酢酸ビニル共重合体との組成物を押出し、膜厚２０μｍ〜５０μｍの前記共重合体（粘着剤層３）を押出ラミネートする。   As a specific example in the case of forming the pressure-sensitive adhesive layer 3 on the base material 2 by extrusion lamination, for example, a low-density polyethylene film (base material 2) having a film thickness of 25 μm to 50 μm is subjected to a die temperature of a T die having a width of 90 cm. At 180 ° C., a saponified ethylene vinyl acetate copolymer or a composition of a saponified ethylene vinyl acetate copolymer and an ethylene vinyl acetate copolymer is extruded, and the copolymer (adhesive layer) having a thickness of 20 μm to 50 μm is extruded. 3) extrusion laminate.

前記基材２の低密度ポリエチレンには、例えばカーネルＫＦ２８３（三菱化学製、密度：０．９２、ＭＩ：２．０ｇ／10min）等を用いる。前記ケン化エチレン酢酸ビニル共重合体には、例えば酢酸ビニルの含有重量％が２８重量％、エチレンの含有重量％が７２重量％、ケン化率８０％、ＭＩ：５．５ｇ／10minのケン化エチレン酢酸ビニル共重合体や、或いは酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ケン化率８０％、ＭＩ：１０ｇ/10minのケン化エチレン酢酸ビニル共重合体等を用いる。前記ケン化エチレン酢酸ビニル共重合体とエチレン酢酸ビニル共重合体との組成物には、例えば酢酸ビニルの含有重量％が２８重量％、エチレンの含有重量％が７２重量％、ケン化率８０％、ＭＩ：５．５ｇ/10minのケン化エチレン酢酸ビニル共重合体を６０重量部、酢酸ビニルの含有重量％が２８重量％、エチレンの含有重量％が７２重量％、ＭＩ：８．５ｇ/10minのエチレン酢酸ビニル共重合体を４０重量部とする組成物や、或いは酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ケン化率８０％、ＭＩ：１０ｇ/10minのケン化エチレン酢酸ビニル共重合体を６０重量部、酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ＭＩ：１０ｇ/10minのエチレン酢酸ビニル共重合体を４０重量部とする組成物等が挙げられる。   As the low-density polyethylene of the base material 2, for example, kernel KF283 (manufactured by Mitsubishi Chemical Corporation, density: 0.92, MI: 2.0 g / 10 min) is used. Examples of the saponified ethylene vinyl acetate copolymer include saponification of 28% by weight of vinyl acetate, 72% by weight of ethylene, 80% saponification rate, and MI: 5.5 g / 10 min. Ethylene vinyl acetate copolymer, or saponified ethylene vinyl acetate copolymer containing 35% by weight of vinyl acetate, 65% by weight of ethylene, 80% saponification, MI: 10 g / 10 min Etc. are used. The composition of the saponified ethylene vinyl acetate copolymer and the ethylene vinyl acetate copolymer includes, for example, 28% by weight of vinyl acetate, 72% by weight of ethylene, and 80% saponification rate. MI: 5.5 g / 10 min of saponified ethylene vinyl acetate copolymer, 60 wt% of vinyl acetate, 28 wt% of ethylene, 72 wt% of ethylene, MI: 8.5 g / 10 min A composition containing 40 parts by weight of ethylene vinyl acetate copolymer, or 35% by weight of vinyl acetate, 65% by weight of ethylene, 80% saponification, MI: 10 g / 10 min 60 parts by weight of saponified ethylene vinyl acetate copolymer, 35% by weight of vinyl acetate, 65% by weight of ethylene, 40% of ethylene vinyl acetate copolymer with MI: 10 g / 10 min Department and Composition and the like that.

また、粘着剤層３と基材２と共に共押出成形で形成する場合の具体例としては、例えば幅９０ｃｍのＴダイのダイス温度を１９０℃として、基材２を構成するカーネルＫＦ２８３等の低密度ポリエチレン（ＰＥ）と、粘着剤層３を構成する上記物性のケン化エチレン酢酸ビニル共重合体（８０重量部、ＥＶＯＨ）とエチレン酢酸ビニル共重合体（２０重量部、ＥＶＡ）との組成物とを共押出成形し、膜厚３０μｍの低密度ポリエチレン（基材２）と膜厚２５μｍの前記組成物（粘着剤層３）とを積層形成する。尚、前記共押出成形で形成した例の詳細な成形条件データを表１に示す。表１に於いて、シリンダ（１）〜（４）は温度制御区分であり、ホッパー側から順に（１）、（２）、（３）、（４）としている。   Moreover, as a specific example in the case of forming by coextrusion molding together with the pressure-sensitive adhesive layer 3 and the base material 2, for example, the die temperature of a 90-cm wide T-die is set to 190 ° C., and low density such as kernel KF283 constituting the base material 2 Composition of polyethylene (PE), saponified ethylene vinyl acetate copolymer (80 parts by weight, EVOH) and ethylene vinyl acetate copolymer (20 parts by weight, EVA) having the above-mentioned physical properties constituting adhesive layer 3; Are co-extruded to form a low-density polyethylene (base material 2) having a thickness of 30 μm and the composition (adhesive layer 3) having a thickness of 25 μm. Table 1 shows detailed molding condition data of an example formed by the coextrusion molding. In Table 1, cylinders (1) to (4) are temperature control sections, which are (1), (2), (3), and (4) in order from the hopper side.

Figure 2007106812
Figure 2007106812

次に、第２実施形態の粘着シート１について説明する。第２実施形態の粘着シート１は、図２に示すように、熱可塑性樹脂の基材２上にアンカー層４と粘着剤層３を順に積層して形成されており、基材２を構成する熱可塑性樹脂は例えば延伸のポリプロピレンフィルム（東洋紡製パイレンフィルムーＯＴ等）或いはポリエチレンテレフタレート（ＰＥＴ）等、アンカー層４を構成する素材は例えばアドマー（三井化学製）若しくはモディック（三菱化学製）などのエチレン無水マレイン酸の変性物、粘着剤層３を構成する素材は例えば第１実施形態と同様のケン化エチレン酢酸ビニル共重合体、若しくはケン化エチレン酢酸ビニル共重合体とエチレン酢酸ビニル共重合体との組成物である。   Next, the adhesive sheet 1 of 2nd Embodiment is demonstrated. As shown in FIG. 2, the pressure-sensitive adhesive sheet 1 of the second embodiment is formed by sequentially laminating an anchor layer 4 and a pressure-sensitive adhesive layer 3 on a thermoplastic resin base material 2, and constitutes the base material 2. The thermoplastic resin is, for example, stretched polypropylene film (Toyobo's pyrene film-OT, etc.) or polyethylene terephthalate (PET), and the material constituting the anchor layer 4 is, for example, Admer (Mitsui Chemicals) or Modic (Mitsubishi Chemical). The modified material of ethylene maleic anhydride and the material constituting the adhesive layer 3 are, for example, the same saponified ethylene vinyl acetate copolymer as in the first embodiment, or the saponified ethylene vinyl acetate copolymer and the ethylene vinyl acetate copolymer. And the composition.

第２実施形態の粘着シート１は、予め成膜されたフィルム状の基材２にグラビア印刷によりアンカー層４を形成し、そのアンカー層４の上に押出ラミネートにより粘着剤層３を押し出して形成するか、或いは基材２、アンカー層４、粘着剤層３の３層を共押出成形することにより形成する。   The pressure-sensitive adhesive sheet 1 of the second embodiment is formed by forming an anchor layer 4 by gravure printing on a film-like substrate 2 formed in advance and extruding the pressure-sensitive adhesive layer 3 on the anchor layer 4 by extrusion lamination. Alternatively, it is formed by coextrusion molding of the base material 2, the anchor layer 4, and the pressure-sensitive adhesive layer 3.

上記アンカー層４をグラビア印刷で形成して粘着剤層３を押出ラミネートで形成する場合の具体例としては、例えば膜厚１６μｍのポリエチレンテレフタレート（ＰＥＴ）を基材２とし、その上にグラビア印刷でアンカー剤のアドマーＱＦ５００を膜厚２μｍでミクロンコートしてアンカー層４を形成する。更に、例えば酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ケン化率８０％、ＭＩ：１０ｇ/10minのケン化エチレン酢酸ビニル共重合体を９０重量部、酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ＭＩ：１０ｇ/10minのエチレン酢酸ビニル共重合体を１０重量部とを混合した組成物を押し出し、膜厚３０μｍの前記共重合体（粘着剤層３）を押出ラミネートする。尚、前記押出ラミネートで形成した例の詳細な成形条件データを表２に示す。シリンダ（１）〜（４）は上記と同様、シリンダの温度制御区分である。   As a specific example in which the anchor layer 4 is formed by gravure printing and the pressure-sensitive adhesive layer 3 is formed by extrusion lamination, for example, a polyethylene terephthalate (PET) having a film thickness of 16 μm is used as the base material 2 and then gravure printing is performed thereon. The anchor layer 4 is formed by micron-coating the anchor agent Admer QF500 with a film thickness of 2 μm. Further, for example, the vinyl acetate content is 35% by weight, the ethylene content is 65% by weight, the saponification rate is 80%, MI: 10 g / 10 min saponified ethylene vinyl acetate copolymer 90 parts by weight, acetic acid A composition in which a vinyl content of 35% by weight, an ethylene content of 65% by weight, and a mixture of 10 parts by weight of ethylene vinyl acetate copolymer of MI: 10 g / 10 min was extruded, and the film having a film thickness of 30 μm was extruded. A copolymer (adhesive layer 3) is extrusion laminated. Table 2 shows detailed molding condition data of an example formed by the extrusion lamination. The cylinders (1) to (4) are cylinder temperature control sections as described above.

Figure 2007106812
Figure 2007106812

また、上記基材２、アンカー層４、粘着剤層３の３層を共押出成形して形成する場合の具体例としては、例えばＴダイのダイス温度を２００℃として、基材２を構成するポリプロピレン（三井化学製Ｆ−３２７）と、アンカー層４を構成するアンカー剤のアドマーＱＦ５００と、粘着剤層３を構成する酢酸ビニルの含有重量％が２８重量％、エチレンの含有重量％が７２重量％、ケン化率８０％、ＭＩ：５．５ｇ／10minのケン化エチレン酢酸ビニル共重合体、又は、酢酸ビニルの含有重量％が３５重量％、エチレンの含有重量％が６５重量％、ケン化率８０％、ＭＩ：１０ｇ/10minのケン化エチレン酢酸ビニル共重合体とを共押出成形し、膜厚１０μｍのポリプロピレン（基材２）と膜厚１０μｍのアンカー層４と膜厚２５μｍの前記共重合体（粘着剤層３）とを積層形成する。尚、前記共押出成形で形成した例の詳細な成形条件データを表３に示す。シリンダ（１）〜（４）は上記と同様、シリンダの温度制御区分である。   Moreover, as a specific example in the case of forming by co-extrusion molding of the base material 2, the anchor layer 4, and the pressure-sensitive adhesive layer 3, the base material 2 is configured with a die temperature of a T die of 200 ° C., for example. Polypropylene (F-327 manufactured by Mitsui Chemicals), anchor agent Admer QF500 constituting the anchor layer 4, vinyl acetate content weight% constituting the adhesive layer 3 is 28 wt%, ethylene content weight% is 72 wt% %, Saponification rate 80%, MI: 5.5 g / 10 min saponified ethylene vinyl acetate copolymer, or vinyl acetate content weight 35%, ethylene content weight% 65%, saponification 80%, MI: 10 g / 10 min saponified ethylene vinyl acetate copolymer is co-extruded to form 10 μm thick polypropylene (base material 2), 10 μm thick anchor layer 4 and 25 μm thick co-polymer. Polymer ( Chakuzaiso 3) and the laminated. Table 3 shows detailed molding condition data of an example formed by the coextrusion molding. The cylinders (1) to (4) are cylinder temperature control sections as described above.

Figure 2007106812
Figure 2007106812

本発明の粘着シートは、例えばスクリーン印刷版に付着した印刷ペースト等を除去するために利用することができる。   The pressure-sensitive adhesive sheet of the present invention can be used to remove, for example, a printing paste attached to a screen printing plate.

第１実施形態の粘着シートの縦断面図。The longitudinal cross-sectional view of the adhesive sheet of 1st Embodiment. 第２実施形態の粘着シートの縦断面図。The longitudinal cross-sectional view of the adhesive sheet of 2nd Embodiment.

符号の説明Explanation of symbols

１ 粘着シート
２ 基材
３ 粘着剤層
４ アンカー層 DESCRIPTION OF SYMBOLS 1 Adhesive sheet 2 Base material 3 Adhesive layer 4 Anchor layer

Claims (3)

熱可塑性樹脂の基材上に粘着剤層が積層され、該粘着剤層がフィルム状の基材上への押出ラミネート成形により形成、若しくは該粘着剤層が基材との共押出成形により形成されていることを特徴とする粘着シート。 A pressure-sensitive adhesive layer is laminated on a thermoplastic resin substrate, and the pressure-sensitive adhesive layer is formed by extrusion lamination molding on a film-like substrate, or the pressure-sensitive adhesive layer is formed by co-extrusion molding with a substrate. A pressure-sensitive adhesive sheet. 熱可塑性樹脂の基材上にアンカー層と粘着剤層が順に積層され、該粘着剤層がフィルム状の基材に形成されたアンカー層上に押出ラミネート成形により形成され、若しくは該粘着剤層が基材とアンカー層との共押出成形により形成されていることを特徴とする粘着シート。 An anchor layer and an adhesive layer are sequentially laminated on a thermoplastic resin substrate, and the adhesive layer is formed by extrusion lamination on an anchor layer formed on a film-like substrate, or the adhesive layer is A pressure-sensitive adhesive sheet formed by coextrusion molding of a base material and an anchor layer. 前記粘着剤層が、エチレンビニルアルコール共重合体、若しくはエチレンビニルアルコール共重合体とエチレン酢酸ビニル共重合体との組成物、若しくはケン化アルキル（メタ）アクリレート、若しくは若しくはケン化アルキル（メタ）アクリレートとアルキル（メタ）アクリレートとの組成物であることを特徴とする請求項１又は２記載の粘着シート。 The pressure-sensitive adhesive layer is an ethylene vinyl alcohol copolymer, a composition of an ethylene vinyl alcohol copolymer and an ethylene vinyl acetate copolymer, a saponified alkyl (meth) acrylate, or a saponified alkyl (meth) acrylate. The pressure-sensitive adhesive sheet according to claim 1, wherein the pressure-sensitive adhesive sheet is a composition of an alkyl (meth) acrylate.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013099969A1 (en) * 2011-12-27 2013-07-04 東洋紡株式会社 Polarizer protective film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013099969A1 (en) * 2011-12-27 2013-07-04 東洋紡株式会社 Polarizer protective film
TWI579601B (en) * 2011-12-27 2017-04-21 東洋紡股份有限公司 Polarizer protection film

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