JPH05299881A - Conductive adhesive sheet - Google Patents
Conductive adhesive sheetInfo
- Publication number
- JPH05299881A JPH05299881A JP4125745A JP12574592A JPH05299881A JP H05299881 A JPH05299881 A JP H05299881A JP 4125745 A JP4125745 A JP 4125745A JP 12574592 A JP12574592 A JP 12574592A JP H05299881 A JPH05299881 A JP H05299881A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- sensitive adhesive
- fiber
- pressure
- conductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Elimination Of Static Electricity (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は導電性及び粘着性のある
シートであり、除電用シート、電磁波シールド用シート
などとして使用できるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a conductive and tacky sheet, which can be used as a static elimination sheet, an electromagnetic wave shielding sheet and the like.
【０００２】[0002]
【従来の技術】従来から、導電性を有し、粘着性のある
シートとして、主として、次の３タイプが知られてい
た。2. Description of the Related Art Conventionally, the following three types have been mainly known as electrically conductive and adhesive sheets.
【０００３】１つめには、実開昭６１−１９４９９９号
公報に記載されているように、導電性を有する基材の少
なくとも片面に、粘着剤層を形成したものが知られてい
る。しかしながら、粘着剤層が絶縁体であるため、基材
と被着体との導電性が悪いという欠点があった。First, as described in Japanese Utility Model Laid-Open No. 61-194999, there is known a substrate having a conductive material and having an adhesive layer formed on at least one surface thereof. However, since the pressure-sensitive adhesive layer is an insulator, there is a drawback that the conductivity between the base material and the adherend is poor.
【０００４】２つめには、特開昭６２−２２７９８５号
公報に記載されているように、導電性を有する基材の少
なくとも片面に、銅、ニッケル或いはカーボンなどの導
電性粒子を含んだ粘着剤層を形成したものが知られてい
る。しかしながら、優れた導電性を得るために導電性粒
子を多量に含ませると、粘着力が低下してしまい、逆
に、粘着力を高めるために導電性粒子の量を減らすと、
導電性が悪くなるという欠点があった。Second, as described in JP-A-62-227985, a pressure-sensitive adhesive containing conductive particles such as copper, nickel or carbon on at least one surface of a conductive base material. A layer is known. However, if a large amount of conductive particles is included in order to obtain excellent conductivity, the adhesive strength will decrease, and conversely, if the amount of conductive particles is reduced to increase the adhesive strength,
There was a drawback that the conductivity deteriorated.
【０００５】３つめには、特開昭６２−２２７９８６号
公報に記載されているように、導電性を有する基材の少
なくとも片面に、粘着剤層を形成し、該基材の一部を粘
着剤層から突出させたものが知られている。しかしなが
ら、被着体との導電性を良くするために突出部を多くす
ると、粘着剤の量が少なくなって粘着力が低下し、逆
に、粘着剤の量が多くなるように突出部を少なくする
と、導電性が悪くなるという欠点があった。Third, as described in JP-A-62-227986, a pressure-sensitive adhesive layer is formed on at least one surface of a conductive base material, and a part of the base material is adhered. Those which are projected from the agent layer are known. However, if the number of protrusions is increased in order to improve the conductivity with the adherend, the amount of adhesive decreases and the adhesive strength decreases. Conversely, the number of protrusions decreases so that the amount of adhesive increases. Then, there is a drawback that conductivity is deteriorated.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記の問題点
を解決するためになされたものであり、導電性、粘着力
のいずれにも優れたシートを提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a sheet excellent in both conductivity and adhesive strength.
【０００７】[0007]
【課題を解決するための手段】本発明の導電性粘着シー
トは少なくとも片面に位置する粗の層１と密の層２とか
らなる、導電加工された繊維シートであり、該粗の層１
の繊維間空隙を主体として粘着剤４が付着している。な
お、粗の層１が高巻縮繊維を主体として構成されている
と、より粘着力に優れたシートとなり、密の層２が０.
５デニール以下の極細繊維を主体として構成されている
と、より除電性に優れたシートとなる。The conductive pressure-sensitive adhesive sheet of the present invention is a conductively processed fiber sheet comprising a coarse layer 1 and a dense layer 2 located on at least one side.
The adhesive 4 is attached mainly to the inter-fiber voids. If the coarse layer 1 is composed mainly of highly crimped fibers, the sheet will be more excellent in adhesive strength, and the dense layer 2 will have a thickness of 0.1.
When the sheet is mainly composed of ultrafine fibers having a denier of 5 denier or less, the sheet has more excellent static elimination property.
【０００８】[0008]
【作用】本発明の導電性粘着シート５は少なくとも片面
に位置する粗の層１と密の層２とからなる、導電加工さ
れた繊維シートであり、密の層２は繊維同士の接触面積
が広くて導電性があるため、電磁波シールド性、除電性
に優れている。また、導電性粘着シート５の粗の層１の
繊維間空隙を主体として粘着剤４が付着しているので、
密の層２の導電性に悪影響を及ぼさないばかりでなく、
使用時には押圧により容易に滲み出て、粘着力を発揮す
る。なお、粗の層１の導電性についても、導電加工され
た繊維は既に被着体に接触しているので、滲み出る粘着
剤４により導電性が妨げられるということもない。The conductive pressure-sensitive adhesive sheet 5 of the present invention is a conductively processed fiber sheet comprising a rough layer 1 and a dense layer 2 located on at least one side, and the dense layer 2 has a contact area between fibers. Since it is wide and conductive, it has excellent electromagnetic wave shielding properties and static elimination properties. In addition, since the adhesive 4 mainly adheres to the interfiber gaps of the rough layer 1 of the conductive adhesive sheet 5,
Not only does it not adversely affect the conductivity of the dense layer 2,
At the time of use, it exudes easily by pressing and exerts an adhesive force. Regarding the conductivity of the rough layer 1, the conductivity-treated fibers are not in contact with the adherend, and therefore the conductivity is not disturbed by the exuding pressure-sensitive adhesive 4.
【０００９】本発明の導電性粘着シート５は粘着剤４を
保持した粗の層１により粘着力を発揮するが、粗の層１
は少なくとも片面、つまり片面のみであっても良いし、
両面とも粗の層１であっても良い。The conductive pressure-sensitive adhesive sheet 5 of the present invention exerts an adhesive force by the rough layer 1 holding the pressure-sensitive adhesive 4, but the rough layer 1
May be at least one side, that is, only one side,
Both sides may be rough layers 1.
【００１０】なお、導電性粘着シート５は粗の層１と密
の層２のみからなっていても良いし、両層の混合層３が
あっても構わない。例えば、既に繊維同士が固定された
繊維シートを２層以上積層した後に、接着剤などによっ
て貼り合わせたものは前者の例であり、繊維同士が固定
されていない繊維ウエブを１層以上積層した後、ニード
ルや水流によって絡合したものは後者の例である。The conductive pressure-sensitive adhesive sheet 5 may be composed of only the rough layer 1 and the dense layer 2, or the mixed layer 3 of both layers. For example, it is an example of the former that two or more fiber sheets in which fibers are already fixed are laminated with each other by an adhesive or the like, and after one or more fiber webs in which fibers are not fixed are laminated. An example of the latter is entangled with a needle or water flow.
【００１１】この導電性粘着シート５を構成する繊維は
特に限定するものではなく、例えば、絹、羊毛、綿、
麻、石綿などの天然繊維、レーヨン繊維などの再生繊
維、アセテート繊維などの半合成繊維、ポリアミド繊
維、ポリビニルアルコール繊維、アクリル繊維、ポリエ
ステル繊維、ポリ塩化ビニリデン繊維、ポリ塩化ビニル
系繊維、ポリウレタン繊維、ポリエチレン繊維、ポリプ
ロピレン繊維などの合成繊維を使用することができる。
なお、一成分からなる繊維のみではなく、２成分以上の
樹脂成分からなる芯鞘型、サイドバイサイド型の複合繊
維も使用できる。The fibers constituting the conductive pressure-sensitive adhesive sheet 5 are not particularly limited and include, for example, silk, wool, cotton,
Natural fibers such as hemp and asbestos, recycled fibers such as rayon fibers, semi-synthetic fibers such as acetate fibers, polyamide fibers, polyvinyl alcohol fibers, acrylic fibers, polyester fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyurethane fibers, Synthetic fibers such as polyethylene fibers and polypropylene fibers can be used.
In addition, not only the fiber made of one component but also the core-sheath type and the side-by-side type conjugate fiber made of two or more resin components can be used.
【００１２】また、機械的、化学的処理を施すことによ
り、繊度が０.５デニール以下の極細繊維に分割可能な
繊維を使用したり、繊度が０.５デニール以下に相当す
るマイクロスパンボンド法により得られる極細繊維を使
用すると、除電性能に優れている。これは、極細繊維が
存在するとコロナ放電が生じやすくなるためと考えられ
る。Fibers that can be divided into ultrafine fibers having a fineness of 0.5 denier or less by applying mechanical or chemical treatment, or a microspun bond method corresponding to a fineness of 0.5 denier or less are used. The use of the ultrafine fibers obtained by the method has excellent static elimination performance. This is considered to be because corona discharge is likely to occur in the presence of the ultrafine fibers.
【００１３】この繊度が０.５デニール以下の極細繊維
に分割可能な繊維としては、一成分中に他成分を島状に
配置した断面をもつ海島型繊維、異なる成分を交互に層
状に積層した断面をもつ多重バイメタル型繊維、或いは
一成分を多成分中に放射状に配した断面をもつ菊花型繊
維を例示することができ、分割可能な繊維を構成する樹
脂成分の組み合わせとして、ポリアミド樹脂とポリエス
テル樹脂、ポリアミド樹脂とポリオレフィン系樹脂、ポ
リエステル樹脂とポリオレフィン系樹脂、ポリエステル
樹脂とポリアクリロニトリル系樹脂を例示することがで
きるが、これらに限定されるものではない。The fibers which can be divided into ultrafine fibers having a fineness of 0.5 denier or less are sea-island type fibers having a cross section in which one component is arranged with another component in an island shape, and different components are alternately laminated in layers. As an example, a multi-bimetal type fiber having a cross section or a chrysanthemum type fiber having a cross section in which one component is radially arranged in a multi-component can be exemplified, and as a combination of resin components constituting a dividable fiber, a polyamide resin and a polyester Examples thereof include resins, polyamide resins and polyolefin resins, polyester resins and polyolefin resins, polyester resins and polyacrylonitrile resins, but are not limited thereto.
【００１４】また、繊維として高巻縮繊維を使用する
と、導電性粘着シート５を引き伸ばしても、高巻縮繊維
の巻縮部分が引き伸ばされるのみで、繊維自体が引き伸
ばされるわけではないので、繊維表面の金属、或いは導
電性ポリマーが剥離して導電性が低下しない。そのた
め、曲面形状をもつ被着体に使用したり、成型加工する
ことも可能となる。特に、粗の層１を高巻縮繊維を主体
として構成すると、高巻縮繊維は微小空間を形成し、嵩
高性に優れているため、該微小空間に粘着剤４を保持す
ることができる。When highly crimped fibers are used as the fibers, even if the conductive adhesive sheet 5 is stretched, only the crimped portions of the highly crimped fibers are stretched, and the fibers themselves are not stretched. The metal on the surface or the conductive polymer is not peeled off to reduce the conductivity. Therefore, it can be used for an adherend having a curved shape or can be molded. In particular, when the coarse layer 1 is composed mainly of highly crimped fibers, the highly crimped fibers form a minute space and are excellent in bulkiness, so that the adhesive 4 can be held in the minute space.
【００１５】この高巻縮繊維は巻縮が顕在化した段階
で、巻縮数が１５〜１００個／インチの繊維であり、よ
り好ましくは２０〜９０個／インチの繊維である。な
お、高巻縮繊維の巻縮が顕在化している場合には、形成
される導電性粘着シート５の形態安定性に優れ、他方、
巻縮が潜在化している場合には、巻縮が顕在化する際に
微小空間を形成しやすい。The highly crimped fiber has a number of crimps of 15 to 100 / inch, and more preferably 20 to 90 pieces / inch, at the stage where crimping is actualized. When the crimp of the highly crimped fiber is actualized, the conductive pressure-sensitive adhesive sheet 5 to be formed is excellent in shape stability, while
When the crimp is latent, it is easy to form a minute space when the crimp is actualized.
【００１６】この高巻縮繊維としては、２種類の収縮率
の異なる樹脂からなり、スパイラル状の巻縮をもつ複合
繊維、或いは単一成分からなり、特定の熱履歴で巻縮を
もつ繊維が例示でき、これらの中でも、高融点ポリエス
テルと低融点ポリエステルからなるサイドバイサイド型
の複合繊維は巻縮数が多く、優れた伸縮性をもち、微小
空間を形成しやすいので好ましく使用できる。As the highly crimped fiber, there are two types of resins having different shrinkage ratios, a composite fiber having a spiral crimp, or a fiber having a single component and crimping with a specific heat history. Of these, side-by-side type composite fibers composed of high-melting point polyester and low-melting point polyester have a large number of crimps, have excellent stretchability, and can easily form a minute space, and thus can be preferably used.
【００１７】本発明では上記のような繊維を使用して織
物、編物、不織布などの既に繊維同士が固定された繊維
シート、或いは繊維同士が固定されていない繊維ウエブ
を形成した後、粗の繊維シート或いは繊維ウエブが、少
なくとも繊維シートの片面を占めるように積層し、接着
剤、或いはニードル、水流などの絡合処理により一体化
する。In the present invention, the above fibers are used to form a fiber sheet such as a woven fabric, a knitted fabric or a non-woven fabric in which fibers are already fixed to each other, or a fiber web in which fibers are not fixed to each other. The sheets or the fibrous webs are laminated so as to occupy at least one side of the fibrous sheet, and integrated by an entanglement treatment with an adhesive, a needle, a water stream or the like.
【００１８】これらの中でも、繊維の毛羽立ちを残した
不織布は除電性に優れる。具体的には、カード法、エア
レイ法、湿式法、スパンボンド法などにより得られる繊
維ウエブを水流、或いはニードルを作用させることによ
り繊維同士を絡合させる方法、或いは部分的に熱或いは
バインダーを作用させることにより結合して得る方法を
例示できる。Among these, the non-woven fabric having the fluff of the fiber left is excellent in the static elimination property. Specifically, a fiber web obtained by a card method, an air lay method, a wet method, a spun bond method, or the like is entwined with a water stream or a needle, or a part of heat or a binder is applied. An example of the method is to obtain them by binding.
【００１９】なお、前述の極細繊維に分割可能な繊維を
使用し、ニードル或いは水流によって繊維同士を絡合す
る場合、同時に繊維を分割することができるので、好ま
しい不織布の形成方法である。他方、高巻縮繊維を使用
し、ニードル或いは水流による絡合処理する場合、繊維
が厚み方向に配向するため、不織布の厚み方向に対する
弾力性が得られるばかりでなく、均一な微小空間が得ら
れるため、粘着剤４を保持しやすい。When fibers that can be divided into the above-mentioned ultrafine fibers are used and the fibers are entangled with each other by a needle or a water stream, the fibers can be divided at the same time, which is a preferable method for forming a non-woven fabric. On the other hand, when highly crimped fibers are used and subjected to entanglement treatment with a needle or water flow, the fibers are oriented in the thickness direction, so that not only elasticity in the thickness direction of the nonwoven fabric is obtained, but also uniform microspaces are obtained. Therefore, it is easy to hold the adhesive 4.
【００２０】なお、粗の層１の繊維間空隙を主体として
粘着剤４を付着させるが、繊維間空隙は粘着剤４の粘度
によって適宜変化させれば良い。例えば、粘着剤４の粘
度が４０,０００cpsの時に、繊維間空隙は１００〜３０
０μm程度である。The pressure sensitive adhesive 4 is adhered mainly to the interfiber voids of the rough layer 1, but the interfiber voids may be appropriately changed depending on the viscosity of the pressure sensitive adhesive 4. For example, when the viscosity of the pressure-sensitive adhesive 4 is 40,000 cps, the interfiber gap is 100 to 30.
It is about 0 μm.
【００２１】以上のようにして得られた繊維シートに導
電加工を施した後、粘着剤４を粗の層１に付着させて、
本発明の導電性粘着シート５を得る。The fiber sheet obtained as described above is subjected to conductive processing, and then the pressure sensitive adhesive 4 is attached to the rough layer 1 to
The conductive pressure-sensitive adhesive sheet 5 of the present invention is obtained.
【００２２】本発明の導電加工としては金属メッキ処
理、蒸着処理、スパッタリング処理、イオンプレーティ
ング、金属溶射、導電性ポリマーによる被覆処理など、
導電性を付与する方法であれば良く、特に限定するもの
ではないが、導電性ポリマーによる被覆処理、特に、電
子共役系ポリマーによる被覆処理は、繊維との密着性が
良いため剥がれ落ちたりせず、耐久性、柔軟性に優れて
いると共に、導電性が比較的低いので、除電性に優れて
いる。The conductive processing of the present invention includes metal plating, vapor deposition, sputtering, ion plating, metal spraying, coating with a conductive polymer, and the like.
It is not particularly limited as long as it is a method of imparting conductivity, but coating treatment with a conductive polymer, particularly coating treatment with an electron-conjugated polymer, does not peel off because of good adhesion to fibers In addition to being excellent in durability and flexibility, it is also excellent in static elimination due to its relatively low conductivity.
【００２３】この導電性ポリマーにより繊維表面を被覆
する方法として、少なくとも塩化鉄（III）、塩化銅（I
I）などの酸化剤を含む溶液を、繊維シートに含浸した
後、モノマーに接触させることにより重合させる方法、
少なくとも塩化鉄（II）、塩化銅（II）などの酸化剤を
含む高分子マトリックスを、繊維シートに付着させた
後、モノマーに接触させることにより重合させる方法な
どが例示できるが、これらに限定されるものではない。
また、接触方法は、モノマーが液体状態の場合、酸化剤
の付着した繊維シートにモノマーを含浸、塗布、或いは
スプレーすれば良く、モノマーが気体状態の場合、モノ
マーで充填した容器内に、酸化剤の付着した繊維シート
を載置すれば良い。As a method for coating the fiber surface with this conductive polymer, at least iron (III) chloride and copper chloride (I
A method of polymerizing by impregnating a fiber sheet with a solution containing an oxidizing agent such as I) and then contacting it with a monomer,
Examples of the method include a method in which a polymer matrix containing at least an oxidizing agent such as iron (II) chloride and copper (II) chloride is adhered to a fiber sheet and then contacted with a monomer to polymerize, but the invention is not limited thereto. Not something.
The contact method may be such that when the monomer is in a liquid state, the fiber sheet to which the oxidant is attached is impregnated, coated or sprayed with the monomer. It suffices to place the fiber sheet to which is attached.
【００２４】この重合させるモノマーとしては、アセチ
レン、ベンゼン、アニリン、フェニルアセチレン、ピロ
ール、フラン、チオフェン、インドール及びこれら電子
共役系モノマーの誘導体などを例示することができる。
これらの中でも、ピロールは導電性、重合性に優れ、好
適に使用できる。Examples of the monomer to be polymerized include acetylene, benzene, aniline, phenylacetylene, pyrrole, furan, thiophene, indole and derivatives of these electron conjugated monomers.
Among these, pyrrole is excellent in conductivity and polymerizability and can be preferably used.
【００２５】他方、無電解メッキ法により繊維シートに
導電加工を行なった場合、繊維シート全体に亘って均一
に、しかも比較的高い導電性が得られるので、電磁波シ
ールド材として好適に使用できる。On the other hand, when the fiber sheet is subjected to conductive processing by the electroless plating method, uniform and relatively high conductivity can be obtained over the entire fiber sheet, so that it can be suitably used as an electromagnetic wave shielding material.
【００２６】以上のようにして導電加工した繊維シート
の、粗の層１の繊維間空隙を主体として粘着剤４を付着
させることにより、優れた導電性と粘着力を有するシー
トを得る。つまり、従来のように、粘着剤４が導電性粘
着シート表面に存在していたのでは、粘着剤４が絶縁体
となり、優れた導電性は得られないが、粘着剤４が導電
性粘着シート５の粗の層の繊維間空隙を主体として付着
しており、導電性粘着シート５の表面は粘着剤４に覆わ
れていないため、導電性は低下せず、しかも導電性粘着
シート５を使用する際に押圧すれば、粗の層１の繊維間
空隙に付着していた粘着剤４が表面に滲み出るため、粘
着力も低下しない。なお、導電性粘着シート５を使用す
る場合には、既に導電性の繊維が被着体に接しているた
め、粘着剤４によって導電性が妨げられるということも
ない。By adhering the pressure-sensitive adhesive 4 mainly on the inter-fiber voids of the rough layer 1 of the fiber sheet which has been electrically processed as described above, a sheet having excellent conductivity and adhesive force is obtained. That is, as in the conventional case, since the pressure-sensitive adhesive 4 is present on the surface of the conductive pressure-sensitive adhesive sheet, the pressure-sensitive adhesive 4 becomes an insulator and excellent conductivity cannot be obtained. 5 is adhered mainly to inter-fiber voids of the rough layer, and the surface of the conductive pressure-sensitive adhesive sheet 5 is not covered with the pressure-sensitive adhesive 4. Therefore, the conductivity is not lowered, and the conductive pressure-sensitive adhesive sheet 5 is used. If pressed at this time, the pressure-sensitive adhesive 4 adhering to the inter-fiber voids of the rough layer 1 oozes out to the surface, and therefore the pressure-sensitive adhesive force does not decrease. When the conductive pressure-sensitive adhesive sheet 5 is used, since the conductive fibers are already in contact with the adherend, the pressure-sensitive adhesive 4 does not hinder the conductivity.
【００２７】このように、粘着剤４が導電性を有するよ
うに銅、ニッケル或いはカーボンなどの導電性粒子を含
んだ粘着剤４を使用する必要もないため、粘着力が低下
するという問題も生じない。本発明の粘着剤４として
は、アクリル酸エステル系ゴム、天然ゴム、シリコン系
ゴム、ポリクロロプレン、ブタジエン−スチレン共重合
体、エチレン−酢酸ビニル共重合体、ポリイソブチレ
ン、ポリビニルエーテル系ゴムなどの溶剤型、エマルジ
ョン型、付加反応型の粘着剤４を使用することができる
が、これらに限定されない。As described above, since it is not necessary to use the pressure-sensitive adhesive 4 containing conductive particles such as copper, nickel or carbon so that the pressure-sensitive adhesive 4 has conductivity, there is a problem that the adhesive strength is lowered. Absent. As the pressure-sensitive adhesive 4 of the present invention, a solvent such as acrylic ester rubber, natural rubber, silicone rubber, polychloroprene, butadiene-styrene copolymer, ethylene-vinyl acetate copolymer, polyisobutylene, polyvinyl ether rubber, etc. A type, emulsion type, or addition reaction type adhesive 4 can be used, but is not limited thereto.
【００２８】粘着剤４の付着方法としては、粘着剤４を
粗の層１の面に塗布したり、スプレーした後、圧力を加
えて繊維間空隙に粘着剤４を押し込めば良い。なお、粘
着剤４は粗の層１の繊維間空隙ばかりでなく、密の層２
の繊維間空隙に付着してもなんら問題はない。また、粗
の層１の繊維間空隙の一部にのみ付着させても良い。As a method of attaching the pressure-sensitive adhesive 4, the pressure-sensitive adhesive 4 may be applied to the surface of the rough layer 1 or sprayed, and then pressure may be applied to push the pressure-sensitive adhesive 4 into the inter-fiber voids. In addition, the pressure-sensitive adhesive 4 is used not only for the inter-fiber voids of the coarse layer 1 but also for the dense layer 2
There is no problem even if they adhere to the inter-fiber voids. Further, it may be attached only to a part of the inter-fiber voids of the rough layer 1.
【００２９】なお、両面が粗の層１からなる繊維シート
の、粗の層１の繊維間空隙に粘着剤４を付着させると、
両面導電性粘着シート５となり、電磁波シールドとして
使用する際に、特に優れた効力を発揮する。例えば、電
子部品の筐体などには接合部分が存在しているが、この
接合部分に本発明の両面導電性粘着シート５を使用すれ
ば、筐体間に導電性が得られ、優れた電磁波シールド性
を発揮する。なお、この粗の層１を構成する繊維が高巻
縮繊維で、水流、ニードルなどの絡合により得られた繊
維シートを導電加工したものは、クッション性に優れ、
筐体間を密着できるため、好適に使用できる。When a pressure-sensitive adhesive 4 is attached to the inter-fiber voids of the rough layer 1 of the fiber sheet having the rough layer 1 on both sides,
The double-sided conductive pressure-sensitive adhesive sheet 5 is particularly effective when used as an electromagnetic wave shield. For example, there is a joint portion in the casing of electronic parts, but if the double-sided conductive adhesive sheet 5 of the present invention is used in this joint portion, conductivity can be obtained between the casings and excellent electromagnetic waves can be obtained. Demonstrate shielding. In addition, the fibers constituting the rough layer 1 are highly crimped fibers, and a fiber sheet obtained by entanglement of water flow, needles, etc., which has been electrically processed, has excellent cushioning properties,
Since the housings can be closely contacted, they can be preferably used.
【００３０】また、片面のみが粗の層１の繊維シート
の、粗の層１の繊維間空隙に粘着剤４を付着させたシー
トは、被着体との導電性を損うことなく粘着させること
ができ、しかも密の層２の繊維により、コロナ放電によ
り除電できるため、好適に除電シートとして使用でき
る。なお、コロナ放電が生じやすいように、密の層２を
構成する繊維に極細繊維が含まれていることが好まし
い。Further, the sheet of the layer 1 having the rough layer 1 only on one side, in which the adhesive 4 is attached to the inter-fiber voids of the rough layer 1, is adhered without impairing the conductivity with the adherend. Moreover, since the fibers of the dense layer 2 can remove the electric charge by corona discharge, it can be suitably used as an electric discharge sheet. It is preferable that the fibers forming the dense layer 2 include ultrafine fibers so that corona discharge is likely to occur.
【００３１】以下に、本発明の実施例を記載するが、以
下の実施例に限定されるものではない。なお、実施例、
比較例における導電性は表面抵抗計（三菱油化株式会社
製、ロレスタＡＰ）により測定した値であり、繊維間空
隙は顕微鏡拡大写真から測定した１０点の平均値であ
る。Examples of the present invention will be described below, but the present invention is not limited to the following examples. Examples,
The conductivity in the comparative example is a value measured by a surface resistance meter (Loresta AP manufactured by Mitsubishi Petrochemical Co., Ltd.), and the interfiber gap is an average value of 10 points measured from a microscope enlarged photograph.
【００３２】[0032]
【実施例】（実施例１）ポリエステル成分を主体とし、
ポリエステル成分をポリアミド成分により接合した繊度
２デニール、繊維長３８mmで、０.１デニールに分割で
きる、断面が菊花型の繊維１００％を、カーディングし
て７０g/m2の繊維ウエブを得た。他方、巻縮数２０〜５
０個／インチで繊度３デニール、繊維長５１mmのポリエ
ステル高巻縮繊維１００％を、カーディングして４０g/
m2の繊維ウエブを得た。その後、これら２つの繊維ウエ
ブを積層し、水圧５０〜９５kg/cm2の水流で絡合し、目
付１１０g/m2、厚み０.７mmの不織布を得た。[Example] (Example 1) Mainly composed of a polyester component,
100% of chrysanthemum-shaped fibers having a fineness of 2 denier, a fiber length of 38 mm and a denier divided into 0.1 denier, in which a polyester component was joined with a polyamide component, were carded to obtain a fiber web of 70 g / m 2 . On the other hand, the number of crimps is 20 to 5
40 g / card of 100% polyester high crimped fiber with a fineness of 3 denier and a fiber length of 51 mm at 0 pcs / inch
A fiber web of m 2 was obtained. Then, these two fiber webs were laminated and entangled with a water flow of 50 to 95 kg / cm 2 of water pressure to obtain a nonwoven fabric having a basis weight of 110 g / m 2 and a thickness of 0.7 mm.
【００３３】この不織布に１０％濃度の塩化鉄（II）を
含浸した後、ピロール溶液を蒸発させたピロールモノマ
ーガスに接触させることにより、不織布の繊維表面にポ
リピロール皮膜を形成させて導電性不織布を得た。この
導電性不織布の表面抵抗は、１.５×１０2Ω／ロであっ
た。This non-woven fabric was impregnated with iron (II) chloride at a concentration of 10%, and then the pyrrole solution was brought into contact with the vaporized pyrrole monomer gas to form a polypyrrole film on the fiber surface of the non-woven fabric to form a conductive non-woven fabric. Obtained. The surface resistance of this conductive nonwoven fabric was 1.5 × 10 2 Ω / B.
【００３４】次に、この導電性不織布の高巻縮繊維を主
体とする粗の層側から、水系エマルジョンのアクリル系
粘着剤４（固形分５０％、粘度３５,０００〜４５,００
０cps）を塗布し、０.７mmのスリットを設けた２本のス
チールロール間を通した後、１００℃で１０分間乾燥し
て、導電性粘着シート５を得た。この導電性粘着シート
５の表面抵抗は、粘着剤塗布側が５.１×１０2Ω／ロ
で、その反対側は１.５×１０2Ω／ロであった。なお、
この導電性粘着シート５の繊維間空隙は、粘着剤塗布側
が１００〜２００μmで、その反対側は３０〜７０μmで
あった。Next, from the side of the rough layer of this conductive nonwoven fabric mainly composed of highly crimped fibers, an acrylic adhesive 4 of an aqueous emulsion (solid content 50%, viscosity 35,000-45,000).
0 cps) was applied and passed between two steel rolls provided with a slit of 0.7 mm, followed by drying at 100 ° C. for 10 minutes to obtain a conductive adhesive sheet 5. The surface resistance of the conductive pressure-sensitive adhesive sheet 5 was 5.1 × 10 2 Ω / lot on the pressure-sensitive adhesive application side and 1.5 × 10 2 Ω / lot on the opposite side. In addition,
The inter-fiber voids of this conductive pressure-sensitive adhesive sheet 5 were 100 to 200 μm on the pressure-sensitive adhesive application side and 30 to 70 μm on the opposite side.
【００３５】（実施例２）実施例１のポリエステル高巻
縮繊維１００％からなる繊維ウエブに代えて、巻縮数１
０〜２０個／インチで繊度３デニール、繊維長５１mmの
ポリエステル繊維１００％を、カーディングして得た４
０g/m2の繊維ウエブを使用し、実施例１と同様の条件で
絡合させ、目付１１０g/m2、厚み０.６mmの不織布を得
た。この不織布に、実施例１と同様にポリピロール皮膜
を形成させて、表面抵抗１.５×１０2Ω／ロの導電性不
織布を得た。次に、この導電性不織布のポリエステル繊
維を主体とする粗の層側から実施例１と同様の粘着剤４
を塗布し、０.６mmのスリットを設けた２本のスチール
ロール間を通した後、同様に１００℃で１０分間乾燥し
て、導電性粘着シート５を得た。この導電性粘着シート
５の表面抵抗は、粘着剤塗布側が４.３×１０2Ω／ロ
で、その反対側は１.５×１０2Ω／ロであった。なお、
この導電性粘着シート５の繊維間空隙は、粘着剤塗布側
が１５０〜３００μmで、その反対側は３０〜７０μmで
あった。(Example 2) Instead of the fiber web made of 100% highly crimped polyester fiber of Example 1, the number of crimps was 1
4 obtained by carding 100% polyester fiber having a fineness of 3 denier and a fiber length of 51 mm at 0 to 20 pieces / inch 4
A 0 g / m 2 fiber web was used and entangled under the same conditions as in Example 1 to obtain a nonwoven fabric having a basis weight of 110 g / m 2 and a thickness of 0.6 mm. A polypyrrole film was formed on this nonwoven fabric in the same manner as in Example 1 to obtain a conductive nonwoven fabric having a surface resistance of 1.5 × 10 2 Ω / b. Next, from the rough layer side of this conductive non-woven fabric mainly composed of polyester fibers, the same pressure-sensitive adhesive 4 as in Example 1 was used.
Was applied and passed between two steel rolls provided with a slit of 0.6 mm, and then similarly dried at 100 ° C. for 10 minutes to obtain a conductive adhesive sheet 5. The surface resistance of the conductive pressure-sensitive adhesive sheet 5 was 4.3 × 10 2 Ω / lot on the adhesive-coated side and 1.5 × 10 2 Ω / lot on the opposite side. In addition,
The interfiber gap of this conductive pressure-sensitive adhesive sheet 5 was 150 to 300 μm on the pressure-sensitive adhesive application side and 30 to 70 μm on the opposite side.
【００３６】（比較例）実施例１と同じ断面が菊花型の
分割可能な繊維１００％を、カーディングして１１０g/
m2の繊維ウエブを得た。この繊維ウエブを実施例１と同
じ条件で絡合し、目付１１０g/m2、厚さ０.７mmの不織
布を得た後、実施例と同様にしてポリピロール皮膜を形
成させて、表面抵抗１.５×１０2Ω／ロの導電性不織布
を得た。次に、この導電性不織布に実施例１と同じ粘着
剤４を塗布し、２本のスチールロール間を通した後、乾
燥して、導電性粘着シートを得た。この導電性粘着シー
トの表面抵抗は、３.７×１０8Ω／ロであった。なお、
この導電性粘着シートの繊維間空隙は、３０〜７０μm
であった。(Comparative Example) 100% of a chrysanthemum-type separable fiber having the same cross section as in Example 1 was carded to 110 g /
A fiber web of m 2 was obtained. The fibrous web was entangled under the same conditions as in Example 1 to obtain a nonwoven fabric having a basis weight of 110 g / m 2 and a thickness of 0.7 mm, and then a polypyrrole film was formed in the same manner as in Example 1 to obtain a surface resistance of 1. A conductive non-woven fabric of 5 × 10 2 Ω / b was obtained. Next, the same pressure-sensitive adhesive 4 as in Example 1 was applied to this conductive non-woven fabric, passed between two steel rolls, and then dried to obtain a conductive pressure-sensitive adhesive sheet. The surface resistance of this conductive pressure-sensitive adhesive sheet was 3.7 × 10 8 Ω / B. In addition,
The interfiber gap of this conductive adhesive sheet is 30 to 70 μm.
Met.
【００３７】[0037]
【発明の効果】本発明の導電性粘着シートは導電加工さ
れた繊維シートを主体として形成されており、密の層は
繊維同士の接触面積が広く、導電性があるため、電磁波
シールド性、除電性に優れている。The conductive pressure-sensitive adhesive sheet of the present invention is mainly formed of a conductively processed fiber sheet, and since the dense layer has a large contact area between fibers and has conductivity, it has an electromagnetic wave shielding property and a static elimination property. It has excellent properties.
【００３８】また、本発明の導電性粘着シートは粗の層
の繊維間空隙を主体として粘着剤が付着しているので、
密の層の導電性には全く悪影響を及ぼさず、しかも使用
時には押圧により容易に滲み出て、粘着力を発揮する。
なお、粗の層の導電性についても、導電加工された繊維
は既に被着体に接触しているので、滲み出る粘着剤によ
り導電性が妨げられるということもない。Since the conductive pressure-sensitive adhesive sheet of the present invention has a pressure-sensitive adhesive mainly composed of interfiber voids of the rough layer,
It has no adverse effect on the electrical conductivity of the dense layer, and it easily exudes by pressing during use and exerts an adhesive force.
With respect to the conductivity of the rough layer, the conductivity-treated fibers are already in contact with the adherend, and therefore the conductivity is not hindered by the exuding pressure-sensitive adhesive.
【００３９】以上のように、本発明の導電性粘着シート
は除電用シート、電磁波シールド用シートとして好適に
使用できるものである。As described above, the conductive pressure-sensitive adhesive sheet of the present invention can be suitably used as a static elimination sheet and an electromagnetic wave shielding sheet.
【図１】 密の層と粗の層との混合層をもつ導電性粘着
シートの略断面図FIG. 1 is a schematic cross-sectional view of a conductive pressure-sensitive adhesive sheet having a mixed layer of a dense layer and a rough layer.
【図２】 密の層と粗の層のみからなる導電性粘着シー
トの略断面図FIG. 2 is a schematic cross-sectional view of a conductive pressure-sensitive adhesive sheet including only a dense layer and a rough layer.
【図３】 両面に粗の層をもつ導電性粘着シートの略断
面図FIG. 3 is a schematic cross-sectional view of a conductive adhesive sheet having rough layers on both sides.
１ 粗の層 ２ 密の層 ３ 混合層 ４ 粘着剤 ５ 導電性粘着シート 1 Coarse Layer 2 Dense Layer 3 Mixed Layer 4 Adhesive 5 Conductive Adhesive Sheet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山崎 洋昭 茨城県猿島郡総和町大字北利根７番地 日 本バイリーン株式会社東京研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Yamazaki 7 North Kitaine, Sowa Town, Sarushima-gun, Ibaraki Prefecture Nihon Bileen Co., Ltd. Tokyo Research Laboratory
Claims (3)
の層２とからなる、導電加工された繊維シートであり、
該粗の層１の繊維間空隙を主体として粘着剤４が付着し
ていることを特徴とする導電性粘着シート。1. A conductively-processed fiber sheet comprising a rough layer 1 and a dense layer 2 located on at least one side,
A conductive pressure-sensitive adhesive sheet, characterized in that the pressure-sensitive adhesive 4 is attached mainly to the inter-fiber voids of the rough layer 1.
されていることを特徴とする請求項１記載の導電性粘着
シート。2. The conductive pressure-sensitive adhesive sheet according to claim 1, wherein the coarse layer 1 is mainly composed of highly crimped fibers.
維を主体として構成されていることを特徴とする請求項
１または請求項２記載の導電性粘着シート。3. The conductive pressure-sensitive adhesive sheet according to claim 1, wherein the dense layer 2 is mainly composed of ultrafine fibers having a denier of 0.5 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04125745A JP3092638B2 (en) | 1992-04-17 | 1992-04-17 | Conductive adhesive sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04125745A JP3092638B2 (en) | 1992-04-17 | 1992-04-17 | Conductive adhesive sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05299881A true JPH05299881A (en) | 1993-11-12 |
| JP3092638B2 JP3092638B2 (en) | 2000-09-25 |
Family
ID=14917755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04125745A Expired - Lifetime JP3092638B2 (en) | 1992-04-17 | 1992-04-17 | Conductive adhesive sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3092638B2 (en) |
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| JP4558345B2 (en) * | 2004-02-19 | 2010-10-06 | リンテック株式会社 | Protective sheet and semiconductor wafer processing method |
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| JP2020072128A (en) * | 2018-10-30 | 2020-05-07 | 株式会社イノアックコーポレーション | Electromagnetic wave shield material |
| WO2020090917A1 (en) * | 2018-10-30 | 2020-05-07 | 株式会社イノアックコーポレーション | Electromagnetic wave shield material and electromagnetic wave shield material production method |
| JP2020184621A (en) * | 2019-04-26 | 2020-11-12 | 株式会社イノアックコーポレーション | Electromagnetic wave shield material and manufacturing method thereof |
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| JP3092638B2 (en) | 2000-09-25 |
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