JP2006117747A - Conductive adhesive tape - Google Patents

Conductive adhesive tape Download PDF

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JP2006117747A
JP2006117747A JP2004305313A JP2004305313A JP2006117747A JP 2006117747 A JP2006117747 A JP 2006117747A JP 2004305313 A JP2004305313 A JP 2004305313A JP 2004305313 A JP2004305313 A JP 2004305313A JP 2006117747 A JP2006117747 A JP 2006117747A
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conductive
layer
pressure
adhesive tape
sensitive adhesive
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Keiichi Mitsuya
圭一 三津屋
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Nitto Shinko Corp
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  • Adhesives Or Adhesive Processes (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive adhesive tape which is capable of showing an improved conducting performance and an improved workability. <P>SOLUTION: The conductive adhesive tape used for electromagnetic shielding has a conductive layer made of a conductive metal foil laid on an adhesive layer made of an adhesive and is equipped with a substrate layer made of fiber fabric placed between the conductive layer and the adhesive layer. The adhesive force of the adhesive layer enables the conductive layer to be supported on the surface of an adherend. A hole is formed on the conductive metal foil so that a burr is formed in the direction of the adhesive layer, and the burr penetrates the adhesive layer so that conductivity can be exerted in the thickness direction of a stack of the conductive adhesive tape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、導電性粘着テープに関し、より詳しくは、導電性金属箔からなる導電層を備える導電性粘着テープに関する。   The present invention relates to a conductive pressure-sensitive adhesive tape, and more particularly to a conductive pressure-sensitive adhesive tape including a conductive layer made of a conductive metal foil.

従来、ワイヤーハーネスなどに電磁波シールドを行う目的などで導電層と粘着剤層とを有する導電性粘着テープが用いられている。該導電性粘着テープには、導電性金属箔などが用いられ、ワイヤーハーネスに粘着剤層を介して貼り付けられ巻きつけられることでワイヤーハーネスを構成する電線から発生する電磁波や、ワイヤーハーネス外部において発生した電磁波を導電性金属箔において誘導電位に変換させる。そして、前記導電性金属箔に接地が施されることで、この誘導電位を低下させ、すなわち前記導電性金属箔を通過する電磁波の強度を低下させて、ワイヤーハーネスから発生した電磁波で周辺機器が誤動作したり、ワイヤーハーネス外部において発生した電磁波によりワイヤーハーネス内の電線に不要な電波が流れたりするのを防止している。   Conventionally, a conductive pressure-sensitive adhesive tape having a conductive layer and a pressure-sensitive adhesive layer has been used for the purpose of shielding an electromagnetic wave on a wire harness or the like. In the conductive adhesive tape, a conductive metal foil or the like is used, and the electromagnetic wave generated from the electric wire constituting the wire harness by being attached and wound around the wire harness via the adhesive layer, or outside the wire harness The generated electromagnetic wave is converted into an induced potential in the conductive metal foil. Then, by grounding the conductive metal foil, the induced potential is lowered, that is, the strength of the electromagnetic wave passing through the conductive metal foil is reduced, and the peripheral device is caused by the electromagnetic wave generated from the wire harness. It prevents malfunctioning or unnecessary radio waves flowing to the wires in the wire harness due to electromagnetic waves generated outside the wire harness.

このような、導電性粘着テープにおいては、リードワイヤーなどの接地部材に直接貼付させて導電性粘着テープと接地部材とを導通させたり、ワイヤーハーネスの長さ方向に向けて、導電性粘着テープの一部を重ね合わせつつスパイラルに巻き重ねた場合に、下に巻かれた導電性粘着テープから周回を経由することなく上に巻かれた導電性粘着テープに電気を通して前記ワイヤーハーネスの長さ方向への抵抗値を低下させたりし得ることから、粘着剤層から導電層方向に導通させたもの、すなわち、テープの厚さ方向にも導電性を示すものが用いられており、特許文献1には、導電性シートを粘着剤層側に部分的に露出させるべく粘着剤を塗布しない部分を設けた粘着剤層を備える導電性粘着テープが記載されている。   In such a conductive pressure-sensitive adhesive tape, the conductive pressure-sensitive adhesive tape is directly attached to a grounding member such as a lead wire so that the conductive pressure-sensitive adhesive tape and the grounding member are electrically connected. When part of the wire harness is rolled up in a spiral, electricity is passed from the conductive adhesive tape wound down to the conductive adhesive tape wound up without going through the lap, in the length direction of the wire harness. Since the resistance value of the adhesive layer can be reduced, the conductive layer in the direction of the conductive layer from the pressure-sensitive adhesive layer, that is, the one showing conductivity in the thickness direction of the tape is used. There is described a conductive pressure-sensitive adhesive tape comprising a pressure-sensitive adhesive layer provided with a portion where no pressure-sensitive adhesive is applied so as to partially expose the conductive sheet to the pressure-sensitive adhesive layer side.

ところで、導電性粘着テープは、従来、厚さ10〜80μmの銅箔、アルミ箔などの導電性金属箔や導電性の高分子材料のフィルムなどが導電層として使用され、該導電層と粘着剤層とにより形成されている。
これらの、導電性の材料のうち、導電性高分子材料を用いたものは、金属箔に比べて一般的に高価であり、しかも導電性が金属箔に比べて低いため、金属箔と同様の導電性を得るためには、巻きつけ回数を増やして面方向の電気抵抗値を低下させるなど、作業工数を増やし、且つ、より多くの導電性粘着テープを用いなければならない。
また、銅箔やアルミ箔を用いたものは、高分子材料を用いたものに比べ強度が低く、ワイヤーハーネスに巻きつけたりする場合の張力などで破断したり、巻きつけ後に生じた振動などで巻きつけられた導電性粘着テープに張力が加わり破断したりする問題がある。したがって、金属箔を用いたものは、巻きつけ作業時に導電性粘着テープに張力が加わらず、且つ、ワイヤーハーネスなど被着体の外形にある程度追従するよう、慎重な巻きつけ作業を必要としている。
By the way, as for the conductive adhesive tape, a conductive metal foil such as a copper foil and an aluminum foil having a thickness of 10 to 80 μm or a film of a conductive polymer material has been conventionally used as the conductive layer. And a layer.
Among these conductive materials, those using a conductive polymer material are generally more expensive than metal foils, and the conductivity is lower than that of metal foils. In order to obtain conductivity, it is necessary to increase the number of work steps such as increasing the number of windings to reduce the electrical resistance value in the surface direction, and to use more conductive adhesive tape.
In addition, copper foil and aluminum foil are less strong than those using a polymer material, and are broken by tension when wound around a wire harness or wound by vibration generated after winding. There is a problem that a tension is applied to the applied conductive adhesive tape to cause breakage. Therefore, the thing using metal foil requires the careful winding operation | work so that tension | tensile_strength may not be added to an electroconductive adhesive tape at the time of winding operation | work, and it may follow to some extent the external shape of adherends, such as a wire harness.

このことに対し、金属箔の厚さを増して導電性粘着テープの強度を向上させることも考え得るが、その場合は、導電性粘着テープのコシが強くなり、ワイヤーハーネスの表面形状に追従しにくくなるなど巻きつけ作業性を低下させてしまうこととなる。
また、金属箔を高分子フィルムと積層させ導電性粘着テープの強度を向上させることも考え得るが、この場合は、高分子フィルムによって厚さ方向の導電性が低下するため導電性粘着テープを重ね合わせた厚さ方向の良好なる導電性を確保することが困難なものとなる。
すなわち、ワイヤーハーネスの電磁波シールドのように、導電性能が良好で作業性の向上が求められる導電性粘着テープにおいて、従来、導電性能を良好なものとしつつ作業性を向上させ得る導電性粘着テープを得ることが困難であるという問題を有している。
On the other hand, it is possible to increase the thickness of the metal foil to improve the strength of the conductive adhesive tape, but in this case, the stiffness of the conductive adhesive tape becomes stronger and follows the surface shape of the wire harness. Wrapping workability will be reduced, such as becoming difficult.
It is also conceivable to improve the strength of the conductive adhesive tape by laminating a metal foil with a polymer film, but in this case, the conductive film is overlapped because the polymer film reduces the conductivity in the thickness direction. It becomes difficult to ensure good conductivity in the combined thickness direction.
That is, in the conductive adhesive tape that has good electrical conductivity and requires improved workability, such as an electromagnetic wave shield of a wire harness, conventionally, an electrically conductive adhesive tape that can improve the workability while improving the electrical conductivity. It has the problem that it is difficult to obtain.

特開2000−351945号公報JP 2000-351945 A

本発明の課題は、上記問題点に鑑み、導電性能を良好なものとしつつ、作業性を向上させ得る導電性粘着テープを提供することにある。   The subject of this invention is providing the electroconductive adhesive tape which can improve workability | operativity, making the electroconductive performance favorable in view of the said problem.

本発明は、前記課題を解決すべく、導電性金属箔からなる導電層と粘着剤からなる粘着剤層とが積層され、該粘着剤層の粘着力によって被着物の表面に前記導電層が担持され、電磁波シールドに用いられる導電性粘着テープであって、前記導電層と粘着剤層との間に繊維織物からなる基材層を備え、導電性粘着テープを重ね合わせた厚さ方向に導電性を示し得るように、前記導電性金属箔には、前記粘着剤層方向にバリが形成されるよう穴が設けられ且つ該バリが前記粘着剤層を貫通していることを特徴とする導電性粘着テープを提供する。   In the present invention, in order to solve the above-mentioned problems, a conductive layer made of conductive metal foil and a pressure-sensitive adhesive layer made of a pressure-sensitive adhesive are laminated, and the conductive layer is carried on the surface of the adherend by the adhesive force of the pressure-sensitive adhesive layer. A conductive pressure-sensitive adhesive tape used for electromagnetic shielding, comprising a base material layer made of a textile fabric between the conductive layer and the pressure-sensitive adhesive layer, and conductive in the thickness direction in which the conductive pressure-sensitive adhesive tapes are stacked. The conductive metal foil is provided with a hole so that a burr is formed in the direction of the pressure-sensitive adhesive layer, and the burr penetrates the pressure-sensitive adhesive layer. Provide adhesive tape.

本発明の導電性粘着テープは、導電性金属箔からなる導電層と粘着剤からなる粘着剤層とが積層され、前記導電性金属箔には、粘着剤層方向にバリが形成されるよう穴が設けられ且つ該バリが前記粘着剤層を貫通しているため、導電性粘着テープを重ね合わせた場合に、下層の導電性粘着テープの導電層と上層の導電性粘着テープの導電層とを前記バリによって直接接触させることができ、厚さ方向の導電性を良好なものとし得る。また、導電層と粘着剤層との間に、繊維織物からなる基材層を備えていることから、金属箔単体を用いた場合に比べて高い強度とすることができ、したがって、巻きつけ作業などが慎重なものとなることを抑制し作業性を向上させ得る。   The conductive pressure-sensitive adhesive tape of the present invention has a conductive layer made of a conductive metal foil and a pressure-sensitive adhesive layer made of a pressure-sensitive adhesive, and the conductive metal foil has holes so that burrs are formed in the direction of the pressure-sensitive adhesive layer. And the burr penetrates the pressure-sensitive adhesive layer, so that when the conductive pressure-sensitive adhesive tape is overlaid, the conductive layer of the lower conductive pressure-sensitive adhesive tape and the conductive layer of the upper conductive pressure-sensitive adhesive tape The burr can be directly contacted, and the conductivity in the thickness direction can be improved. In addition, since a base material layer made of a textile fabric is provided between the conductive layer and the pressure-sensitive adhesive layer, the strength can be increased compared to the case of using a metal foil alone, and therefore the winding work It is possible to improve the workability by restraining such as being cautious.

はじめに、本発明の好ましい実施形態の導電性粘着テープについて図面を参照して説明する。   First, the electroconductive adhesive tape of preferable embodiment of this invention is demonstrated with reference to drawings.

本実施形態において、導電性粘着テープ10は、最外層に金属箔からなる導電層1を備え、該導電層1の内層側に繊維織物からなる基材層2を備え。さらに該基材層2の内層側に粘着剤からなる粘着剤層3を備えている。
また、本実施形態の導電性粘着テープ10は、前記金属箔から基材層2ならびに粘着剤層3を貫通するバリ4を形成するよう、前記金属箔に、粘着剤層方向に向かって押し広げられた穴5が形成されている。
In this embodiment, the conductive adhesive tape 10 includes a conductive layer 1 made of a metal foil in the outermost layer, and a base material layer 2 made of a fiber fabric on the inner layer side of the conductive layer 1. Furthermore, an adhesive layer 3 made of an adhesive is provided on the inner layer side of the base material layer 2.
Moreover, the conductive adhesive tape 10 of this embodiment is pushed and spread | stretched toward the adhesive layer direction to the said metal foil so that the burr | flash 4 which penetrates the base material layer 2 and the adhesive layer 3 from the said metal foil may be formed. The formed hole 5 is formed.

まず、本実施形態の導電性粘着テープを構成する各部材について説明する。
前記導電層1は、銅、アルミニウム、鉄、ニッケルもしくは、それらの合金を単独またはメッキを施すなどして用いることができ、通常、5〜50μmの厚さのものを使用することができる。
本実施形態においては、安価で、導電率に優れる点から、銅又は、アルミニウムを好適に用いることができる。
なお、前記導電層1として銅箔を用いる場合には、比較的高い耐薬品性を有し、バッテリー液、路面の凍結防止剤(融雪剤)などに対する優れた耐性を有することから自動車用ワイヤーハーネス用の導電性粘着テープとして好適なものとなり、10〜30μm厚さの銅箔が好適に用いられる。該銅箔としては、マット面を有し、アンカー効果により基材層との接着性を向上させ得る点から、電解銅箔が好適に用いられ、該電解銅箔のシャイニング面が表面に露出するよう、マット面側をドライラミネーションにより基材層に接着され積層される。
さらに、前記電解銅箔のシャイニング面は、酸化皮膜の形成によって積層時に厚さ方向の導電性を低下させることを防止すべく防錆処理、ニッケルメッキなどの処理が施されていることが好ましく、さらに、重ね合わせて貼り付けた後に、引き剥がして再び貼り付けする作業性を優れたものとし得る点から適度な剥離性を有するよう背面処理が施されることが好ましい。
First, each member which comprises the electroconductive adhesive tape of this embodiment is demonstrated.
The conductive layer 1 can be used by plating copper, aluminum, iron, nickel, or an alloy thereof alone or by plating. Usually, a layer having a thickness of 5 to 50 μm can be used.
In the present embodiment, copper or aluminum can be suitably used because it is inexpensive and has excellent conductivity.
When copper foil is used as the conductive layer 1, it has a relatively high chemical resistance and has excellent resistance to battery fluid, anti-freezing agent (snow melting agent) for road surfaces, etc. For example, a copper foil having a thickness of 10 to 30 μm is preferably used. As the copper foil, an electrolytic copper foil is preferably used because it has a matte surface and can improve the adhesion to the base material layer by an anchor effect, and the shining surface of the electrolytic copper foil is exposed on the surface. Thus, the mat surface side is adhered and laminated to the base material layer by dry lamination.
Furthermore, the shining surface of the electrolytic copper foil is preferably subjected to a treatment such as a rust prevention treatment and nickel plating in order to prevent a decrease in conductivity in the thickness direction during the lamination by forming an oxide film, Furthermore, it is preferable that the back treatment is performed so as to have an appropriate releasability from the viewpoint that the workability of peeling and reattaching can be made excellent after being superposed and attached.

また、前記導電層1としてアルミニウム箔を用いる場合には、アルミニウムは、特別な防食処理を施すことなく屋外環境における耐食性に優れ、単位重量あたりの導電率が比較的高く導電性粘着テープの重量を軽量化させ得るものとなる。したがって、耐食性に優れ、搭載する部材を軽量化させ得る点から、自動車用ワイヤーハーネス用の導電性粘着テープとして好適なものとなり、10〜30μm厚さのアルミニウム箔が好適に用いられる。   Further, when an aluminum foil is used as the conductive layer 1, aluminum has excellent corrosion resistance in an outdoor environment without performing a special anticorrosion treatment, has a relatively high conductivity per unit weight, and can reduce the weight of the conductive adhesive tape. The weight can be reduced. Therefore, since it is excellent in corrosion resistance and can reduce the weight of the mounted member, it is suitable as a conductive adhesive tape for an automobile wire harness, and an aluminum foil having a thickness of 10 to 30 μm is suitably used.

前記基材層2の繊維織物は、前記導電層に比べて高い引張り強度を有するものが好適であり、ガラス繊維、ポリエステル繊維、ナイロン繊維、アセテート繊維、レーヨン繊維、綿繊維などの織物もしくはこれら繊維の混紡品を用いた織物を用いることができる。
本実施形態においては、柔軟性を有しつつ、高い引張り強度を有する点において坪量50〜130g/m2のガラス繊維織物を好適に用いることができる。前記ガラス繊維織物が、坪量50〜130g/m2であることが好ましいのは、50g/m2未満の場合には、導電性粘着テープが十分な強度とならないおそれを有し、130g/m2を超えても必要以上の強度となるばかりでガラス繊維織物のコシが強くなりすぎて、作業性を低下させるおそれを有するためである。
なお、前記基材層2としてガラス繊維織物を用いたものは、その他の繊維織物を用いたものに比べて、安価で、坪量に対する強度向上効果が高く、耐薬品性にも優れ、不燃性を示す点から自動車用ワイヤーハーネスの導電性粘着テープとして好適なものとなり、自動車用ワイヤーハーネス導電性粘着テープに用いるガラス繊維織物としては、軽量でかつ優れた作業性とし得る点から、前記坪量が70〜100g/m2のガラス繊維織物がさらに好適である。
The fiber fabric of the base material layer 2 preferably has a higher tensile strength than the conductive layer, and is a fabric of glass fiber, polyester fiber, nylon fiber, acetate fiber, rayon fiber, cotton fiber or the like. A woven fabric using a blend of these can be used.
In this embodiment, a glass fiber fabric having a basis weight of 50 to 130 g / m 2 can be suitably used in that it has flexibility and high tensile strength. The glass fiber woven fabric, the is preferably a basis weight of 50~130g / m 2 in the case of less than 50 g / m 2 has a fear that the conductive adhesive tape is not a sufficient strength, 130 g / m This is because even if it exceeds 2 , the strength of the glass fiber fabric becomes excessively strong and the stiffness of the glass fiber fabric becomes too strong, which may reduce workability.
In addition, what used the glass fiber fabric as the said base material layer 2 is cheap compared with the thing using other fiber fabrics, the strength improvement effect with respect to a basic weight is high, it is excellent in chemical resistance, and nonflammability The glass fiber fabric used for the automotive wire harness conductive adhesive tape is a lightweight and excellent workability from the point of view of the basis weight Is more preferably a glass fiber woven fabric of 70 to 100 g / m 2 .

前記粘着剤層3は、アクリル系、ゴム系、シリコーン系粘着剤などにより、好ましくは、30〜200μmの厚さとされ、より好ましくは、50〜130μmの厚さとされる。粘着剤層3の厚さが30μm未満の場合は、十分な粘着性を有するものとならないおそれを有し、200μmを超えた厚さとしてもそれ以上粘着性を高めることが困難であるばかりか、粘着剤層3の厚さが大きすぎて、導電性金属箔のバリ4の先端を粘着剤層3の表面に露出させることが困難となるおそれを有するためである。
また、前記粘着剤には、粘着性付与剤、老化防止剤、酸化防止剤、防錆剤、充填剤、帯電防止剤などを添加しても良い。
The pressure-sensitive adhesive layer 3 is preferably 30 to 200 [mu] m thick, more preferably 50 to 130 [mu] m thick, using an acrylic, rubber-based, or silicone-based pressure-sensitive adhesive. When the thickness of the pressure-sensitive adhesive layer 3 is less than 30 μm, there is a possibility that it does not have sufficient adhesiveness, and even if the thickness exceeds 200 μm, it is difficult to further increase the adhesiveness. This is because the thickness of the pressure-sensitive adhesive layer 3 is so large that it may be difficult to expose the tip of the burr 4 of the conductive metal foil to the surface of the pressure-sensitive adhesive layer 3.
Moreover, you may add a tackifier, an anti-aging agent, antioxidant, a rust preventive agent, a filler, an antistatic agent etc. to the said adhesive.

これら、導電層1、基材層2、粘着剤層3の積層方法としては、一般的な積層手段を用いることができ、例えば、導電層1と基材層2とをドライラミネーションしたものに粘着剤層用材料を溶剤にて希釈した溶液を塗布乾燥させて形成させることができ、要すれば、粘着剤層3の内側に、さらに剥離紙などを積層して粘着剤層3にゴミ、異物が付着することを防止してもよい。   As a method for laminating the conductive layer 1, the base material layer 2, and the pressure-sensitive adhesive layer 3, general laminating means can be used. For example, the conductive layer 1 and the base material layer 2 are adhered to those obtained by dry lamination. It can be formed by applying and drying a solution obtained by diluting the adhesive layer material with a solvent. If necessary, a release paper or the like is further laminated on the inner side of the adhesive layer 3 to remove dust and foreign matter on the adhesive layer 3. May be prevented from adhering.

次いで、上記のように構成された導電性粘着テープ10に、前記基材層2ならびに粘着剤層3を貫通するバリ4を形成するよう前記金属箔側から粘着剤層方向に向かって押し広げられた穴5を形成する方法について説明する。   Next, the conductive adhesive tape 10 configured as described above is pushed and spread from the metal foil side toward the adhesive layer so as to form burrs 4 penetrating the base material layer 2 and the adhesive layer 3. A method for forming the hole 5 will be described.

導電性粘着テープ10に前記穴5を形成するには、例えば、直径0.1〜2.0mm程度の先鋭なる棒状体を表面に前後左右2〜9mmピッチで立設させて備えたロールとゴム製ベルトコンベアなどを用いることができる。すなわち、前記ベルトコンベアの上位に、該ベルトコンベアの進行方向に対して回転自在な状態、且つ、前記棒状体先端がベルトコンベアに当接するよう前記ロールを配し、前記ベルトコンベアの上に導電性粘着テープ10を金属箔側が上面となるよう載置し、前記ロールを回転させつつ、導電性粘着テープ10を通過させることで金属箔側から粘着剤層方向に向かって押し広げられた穴5を形成することができる。   In order to form the hole 5 in the conductive adhesive tape 10, for example, a roll and rubber provided with a sharp rod-like body having a diameter of about 0.1 to 2.0 mm standing on the surface at a pitch of 2 to 9 mm on the front and rear sides A belt conveyor or the like can be used. That is, the roll is disposed above the belt conveyor so as to be rotatable with respect to the traveling direction of the belt conveyor and the tip of the rod-shaped body comes into contact with the belt conveyor. The adhesive tape 10 is placed so that the metal foil side is the upper surface, and the hole 5 that is pushed from the metal foil side toward the adhesive layer direction by passing the conductive adhesive tape 10 while rotating the roll is formed. Can be formed.

このとき、粘着剤層3を貫通して粘着剤層3表面から突出したバリ4を絞りロールなどを用いて粘着剤層3表面に押付けることで、粘着剤層3表面の凹凸を無くし、導電性粘着テープ10をロール状に巻き取り易いものとすることができ、しかも、粘着剤層3表面に金属箔が大きな面積で露出するため、導電性粘着テープ10の厚さ方向の導電性をより良好なものとし得る。   At this time, the burrs 4 penetrating through the pressure-sensitive adhesive layer 3 and protruding from the surface of the pressure-sensitive adhesive layer 3 are pressed against the surface of the pressure-sensitive adhesive layer 3 using a squeeze roll or the like, thereby eliminating the irregularities on the surface of the pressure-sensitive adhesive layer 3. The conductive adhesive tape 10 can be easily wound into a roll, and the metal foil is exposed on the surface of the pressure-sensitive adhesive layer 3 in a large area, so that the conductivity in the thickness direction of the conductive adhesive tape 10 is further increased. It can be good.

また、前記穴5は、好ましくは、直径0.2〜1.0mmで前後左右2〜9mmピッチで形成されることが好ましい。
前記穴5が0.2mm未満の場合は、粘着剤層3を貫通するバリ4を形成することが困難となるおそれを有し、1.0mmを超える穴5を設けた場合には、導電性粘着テープ10としての粘着力を低下させるおそれを有するためである。
Further, the holes 5 are preferably formed with a diameter of 0.2 to 1.0 mm and a pitch of 2 to 9 mm on the front and rear sides.
If the hole 5 is less than 0.2 mm, it may be difficult to form the burr 4 that penetrates the pressure-sensitive adhesive layer 3. This is because the adhesive tape 10 may have reduced adhesive strength.

次に実施例を挙げて本発明をさらに詳しく説明するが、本発明はこれらに限定されるものではない。
(実施例1)
厚さ20μmのアルミニウム箔と、ガラスクロス(繊度:67.5デシテックス、度目:縦16本/インチ×横15本/インチ、坪量:83g/m2、厚さ:約110μm)とをポリエステル系ラミネート接着剤を用いて接着した。一方、アクリル系粘着剤固形分100重量部に対し、トルエン200重量部を混合し前記ガラスクロスに塗布し、乾燥後約70μmの厚さに形成した。その後、前記アルミニウム箔側から先鋭なる棒状体を用いて前後左右3mm間隔で、直径1mmの穴を形成し導電性粘着テープを作成した。
(実施例2)
厚さ20μmのアルミニウム箔に代えて厚さ12μmの銅箔を用いたこと以外は、実施例1と同様に導電性粘着テープを作成した。
EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these.
Example 1
Polyester-based aluminum foil with a thickness of 20 μm and glass cloth (fineness: 67.5 dtex, degree: length 16 / inch × width 15 / inch, basis weight: 83 g / m 2 , thickness: about 110 μm) Bonding was performed using a laminate adhesive. On the other hand, 200 parts by weight of toluene was mixed with 100 parts by weight of the acrylic adhesive solid content, applied to the glass cloth, and dried to form a thickness of about 70 μm. Thereafter, using a rod-like body sharpened from the aluminum foil side, holes with a diameter of 1 mm were formed at intervals of 3 mm in the front-rear and left-right directions to prepare a conductive adhesive tape.
(Example 2)
A conductive adhesive tape was prepared in the same manner as in Example 1 except that a copper foil having a thickness of 12 μm was used instead of the aluminum foil having a thickness of 20 μm.

(比較例1)
ガラスクロスを用いず、穴を形成していないこと以外は実施例1と同様に導電性粘着テープを製造した。
(Comparative Example 1)
A conductive adhesive tape was produced in the same manner as in Example 1 except that no glass cloth was used and no hole was formed.

(評価)
・引張り強度試験
幅20mmのリボン状試料を作成し、チャック間距離100mmとして、300mm/minの速度で引張り試験を行ない破断時の応力を測定した。
・作業性
外径約2mmの電線を2本平行に保持したものに、1mの区間、ハーフラップにより導電性粘着テープを巻きつけ、前記区間の巻き付け作業中に、折れ、しわ、切れなどの不具合が生じないかどうか確認した。
・電磁波シールド試験
150mm×150mmの導電性粘着テープを試験片として用いて、KEC法によりシールド効果を測定した。具体的には、アンリツ社製シールドボックス内の一方から、スペクトラムアナライザ(アドバンテスト社製「R3361」)を用いて10MHzの電磁波を発生させ他方で観測される電磁波の強度をアンリツ社製「PER AMPLIFER MH648A」にて増幅させて測定し、前記他方において受信する電磁波のレベルが、電磁波の発生個所と測定個所との間に前記試験片を設置したときにどの程度低下するかを測定した。
・接触抵抗試験
80mm×80mmに切断された導電性粘着テープを、100mm×100mmの大きさの真ちゅう製電極(下電極)上に、導電層を下向きに載置し、該載置された導電性粘着テープ上に直径50mmの接触円を有する重さ5kgの真ちゅう製電極(上電極)を載せ該上電極と前記下電極との抵抗値をデジタルマルチメーター(武田理研:TR−6656)を用いて測定した。
これらの評価結果を、表1に示す。
(Evaluation)
-Tensile strength test A ribbon-like sample having a width of 20 mm was prepared, a tensile test was performed at a speed of 300 mm / min with a distance between chucks of 100 mm, and a stress at break was measured.
・ Workability Wrapping conductive adhesive tape with a 1m section and half wrap around two wires with an outer diameter of about 2mm held in parallel. During the winding work of the section, problems such as folds, wrinkles, cuts, etc. Was confirmed whether or not.
-Electromagnetic wave shielding test Using a 150 mm x 150 mm conductive adhesive tape as a test piece, the shielding effect was measured by the KEC method. Specifically, an electromagnetic wave of 10 MHz is generated from one side of the Anritsu shield box using a spectrum analyzer (“R3361” manufactured by Advantest), and the intensity of the electromagnetic wave observed on the other side is measured by “PER AMPLIFER MH648A” manufactured by Anritsu. The level of the electromagnetic wave received on the other side was measured to determine how much the level of the electromagnetic wave received when the test piece was placed between the location where the electromagnetic wave was generated and the measurement location.
Contact resistance test Conductive adhesive tape cut to 80 mm x 80 mm is placed on a brass electrode (lower electrode) with a size of 100 mm x 100 mm with the conductive layer facing downward, and the placed conductive A 5 kg weight brass electrode (upper electrode) having a contact circle with a diameter of 50 mm is placed on the adhesive tape, and the resistance value between the upper electrode and the lower electrode is measured using a digital multimeter (Takeda Riken: TR-6656). It was measured.
These evaluation results are shown in Table 1.

Figure 2006117747
Figure 2006117747

表1から、導電層と粘着剤層との間に繊維織物からなる基材層を備え、導電性金属箔に粘着剤層方向にバリが形成されるよう穴が設けられ且つ該バリが粘着剤層を貫通させた導電性粘着テープを用いることで、接触抵抗が低く、すなわち、重ね合わせた場合の厚さ方向の導電性を良好なものとでき、しかも、作業性が良好となることがわかる。   From Table 1, a base material layer made of a fiber fabric is provided between the conductive layer and the pressure-sensitive adhesive layer, and a hole is provided in the conductive metal foil so that a burr is formed in the direction of the pressure-sensitive adhesive layer. It can be seen that by using a conductive adhesive tape having a layer penetrated, the contact resistance is low, that is, the conductivity in the thickness direction when it is superposed can be improved, and the workability is improved. .

一実施形態の導電性粘着テープを示す一部拡大断面図The partially expanded sectional view which shows the electroconductive adhesive tape of one Embodiment

符号の説明Explanation of symbols

1:導電層
2:基材層
3:粘着剤層
4:バリ
5:穴
10:導電性粘着テープ
1: Conductive layer 2: Base material layer 3: Adhesive layer 4: Burr 5: Hole 10: Conductive adhesive tape

Claims (1)

導電性金属箔からなる導電層と粘着剤からなる粘着剤層とが積層され、該粘着剤層の粘着力によって被着物の表面に前記導電層が担持され、電磁波シールドに用いられる導電性粘着テープであって、
前記導電層と粘着剤層との間に繊維織物からなる基材層を備え、
導電性粘着テープを重ね合わせた厚さ方向に導電性を示し得るように、前記導電性金属箔には、前記粘着剤層方向にバリが形成されるよう穴が設けられ且つ該バリが前記粘着剤層を貫通していることを特徴とする導電性粘着テープ。
A conductive pressure-sensitive adhesive tape used for electromagnetic wave shielding, in which a conductive layer made of conductive metal foil and a pressure-sensitive adhesive layer made of pressure-sensitive adhesive are laminated, and the conductive layer is supported on the surface of the adherend by the adhesive force of the pressure-sensitive adhesive layer Because
A substrate layer made of a textile fabric is provided between the conductive layer and the pressure-sensitive adhesive layer,
The conductive metal foil is provided with holes so that burrs are formed in the direction of the pressure-sensitive adhesive layer so that the conductive metal foil can exhibit conductivity in the thickness direction where the conductive pressure-sensitive adhesive tapes are stacked. A conductive pressure-sensitive adhesive tape characterized by penetrating the agent layer.
JP2004305313A 2004-10-20 2004-10-20 Conductive adhesive tape Withdrawn JP2006117747A (en)

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Cited By (7)

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KR100774441B1 (en) 2007-01-17 2007-11-08 조인셋 주식회사 Conductive adhesive tape
WO2011108490A1 (en) * 2010-03-03 2011-09-09 日東電工株式会社 Electrically conductive adhesive tape
JP2014109065A (en) * 2012-12-04 2014-06-12 Sumitomo Metal Mining Co Ltd Electroplating method and method of producing metallized long resin film
CN110982441A (en) * 2019-12-24 2020-04-10 佳普电子新材料(连云港)有限公司 Conductive cloth shielding adhesive tape and manufacturing process thereof
JP2021174948A (en) * 2020-04-30 2021-11-01 東洋インキScホールディングス株式会社 Electromagnetic wave shield sheet, and printed wiring board and production method thereof
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100774441B1 (en) 2007-01-17 2007-11-08 조인셋 주식회사 Conductive adhesive tape
KR100774440B1 (en) 2007-01-17 2007-11-08 조인셋 주식회사 Conductive pressure sensitive adhesive tape
WO2011108490A1 (en) * 2010-03-03 2011-09-09 日東電工株式会社 Electrically conductive adhesive tape
JP6061676B2 (en) * 2010-03-03 2017-01-18 日東電工株式会社 Conductive adhesive tape
JP2014109065A (en) * 2012-12-04 2014-06-12 Sumitomo Metal Mining Co Ltd Electroplating method and method of producing metallized long resin film
CN110982441A (en) * 2019-12-24 2020-04-10 佳普电子新材料(连云港)有限公司 Conductive cloth shielding adhesive tape and manufacturing process thereof
JP2021174948A (en) * 2020-04-30 2021-11-01 東洋インキScホールディングス株式会社 Electromagnetic wave shield sheet, and printed wiring board and production method thereof
JP7452230B2 (en) 2020-04-30 2024-03-19 artience株式会社 Electromagnetic shielding sheet, printed wiring board and manufacturing method thereof
CN113927992A (en) * 2021-11-12 2022-01-14 凯仁精密材料(江苏)有限公司 Conductive adhesive tape, electromagnetic shielding adhesive tape and preparation method of electromagnetic shielding adhesive tape
CN114058275A (en) * 2021-11-16 2022-02-18 江西柔顺科技有限公司 Conductive cloth adhesive tape and preparation method thereof

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