JPH11112188A - Electromagnetic wave shielding/absorbing material - Google Patents

Electromagnetic wave shielding/absorbing material

Info

Publication number
JPH11112188A
JPH11112188A JP28249797A JP28249797A JPH11112188A JP H11112188 A JPH11112188 A JP H11112188A JP 28249797 A JP28249797 A JP 28249797A JP 28249797 A JP28249797 A JP 28249797A JP H11112188 A JPH11112188 A JP H11112188A
Authority
JP
Japan
Prior art keywords
metal
carbon
electromagnetic wave
wave shielding
current collector
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.)
Withdrawn
Application number
JP28249797A
Other languages
Japanese (ja)
Inventor
Tadashi Kumamoto
忠司 熊本
Takeshi Hirasawa
剛 平沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTS TRADING KK
Original Assignee
JTS TRADING KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JTS TRADING KK filed Critical JTS TRADING KK
Priority to JP28249797A priority Critical patent/JPH11112188A/en
Publication of JPH11112188A publication Critical patent/JPH11112188A/en
Withdrawn legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To improve the absorption effect of high/low-frequency electromagnetic waves, by providing a carbon material sheet consisting of powder-shaped or fine-particle-shaped carbon or a carbon-containing substance and a metal- containing pyroelectric being applied to one surface of the carbon material sheet. SOLUTION: In a carbon material sheet 1a, charcoal or the like is ground into powder and further the powder is turned into fine particles, and then a special adhesive such as a conductive bond is mixed, thus forming a sheet shape by compression machining. With a metal-containing pyroelectric 2a, conductive metals such as gold, silver, copper aluminum, nickel, and iron or their alloys are used, where for example a metal plate, a metal foil, and a base are plated or deposited and a fiber base such as paper is impregnated with a metal particle. When the powder-shaped or fine-particle-shaped carbon or carbon-containing material receive electromagnetic waves, they vibrate between adjacent ones and at the same time are converted to thermal energy. By combining a pyroelectric part due to the metal-containing pyroelectric with it, the function is amplified, thus obtaining a high electromagnetic shielding effect at high/low-frequency bands.

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、電磁波に対しての
顕著なシールド効果のある電磁波遮蔽吸収材に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding and absorbing material having a remarkable shielding effect against electromagnetic waves.

【0002】[0002]

【従来の技術】電磁波の人体への影響が報告され、該電
磁波をシールドするための技術開発も近年盛んになって
いるが、上記報告が携帯電話等の発する高周波帯域にお
ける電界によるものを主としており、従ってそのシール
ド技術も、その帯域のものを中心とするものである。
2. Description of the Related Art The effects of electromagnetic waves on the human body have been reported, and techniques for shielding the electromagnetic waves have been actively developed in recent years. However, the above reports are mainly based on electric fields in the high frequency band generated by mobile phones and the like. Therefore, the shielding technology is also centered on the band.

【0003】[0003]

【発明が解決しようとする課題】上述のように、携帯電
話等の高周波帯域の電磁波を放出する機器を使用した場
合の人体への影響が数多く報告されているため、シール
ド技術もその帯域におけるものが中心であり、その場
合、電磁波のうちの電界による影響のみを問題にしてい
る。これに対し、商用電源用の高圧線付近等で発生する
低周波帯域の電磁波では、電界のみならず磁界による人
体への影響も大きいと言われており、従って高周波帯域
におけるシールド技術をそのまま用いることはできな
い。本発明は従来技術の以上のような問題に鑑み創案さ
れたもので、高周波帯域における電磁波遮蔽吸収効果が
高く、また低周波帯域についても、同効果の高い電磁波
遮蔽吸収材を提供せんとするものである。
As described above, there have been many reports on the effects on the human body when using a device that emits electromagnetic waves in a high-frequency band such as a mobile phone. Is the center, in which case only the effect of the electric field of the electromagnetic waves is considered. In contrast, low-frequency electromagnetic waves generated near high-voltage lines for commercial power sources are said to have a large effect on the human body due to not only electric fields but also magnetic fields. Can not. The present invention has been made in view of the above problems of the prior art, and has a high electromagnetic wave shielding and absorbing effect in a high frequency band, and also provides a high electromagnetic wave shielding and absorbing material having the same effect in a low frequency band. It is.

【0004】[0004]

【課題を解決するための手段】そのため本発明に係る電
磁波遮蔽吸収材は、粉末状乃至微粒子状の炭素乃至炭素
含有物をシート状にした炭素材シートと、該炭素材シー
トの少なくとも一面に貼着された金属含有集電体とを有
することを基本的特徴としている。上記炭素材シート
は、例えば炭等を粉砕して粉末状にしたものや更にこれ
らの粉末を微粒子状にしたもの(粉末同士を高速に衝突
させる等して得ることができる)等に、特殊接着剤(導
電性ボンド等)を混合させて圧縮加工し、シート状にし
たものを用いることができる。もちろん炭等以外にも炭
素を含有しているものであれば、高周波帯域及び低周波
帯域における高い電磁波シールド効果を得ることができ
る。上記金属含有集電体は、金、銀、銅、アルミニウ
ム、ニッケル、鉄等の導電性の金属乃至これらの合金を
用い、例えば金属板、金属箔、基材に金属メッキしたも
のや金属蒸着させたもの、或いは該金属粒子を含浸させ
た繊維質のもの(例えば紙)等を用いることもできる。
但し布は、後述するように、湿度の吸収・乾燥の履歴を
重ねるうちに体積の変化を起こし、この時の布の体積変
化(動き)に伴って、含浸させた上記金属粒子相互の界
面に亀裂分離を生じ、部分的に絶縁状態を生ずること、
上記の布の体積変化に伴って炭素材シートとの密着面に
剥離を生ずること、また湿度の吸収・乾燥の上記履歴に
より繊維質が細り、その隙間から、上記のようにして剥
離した炭素材シートの炭素乃至炭素含有物が次第に離脱
して、電磁波シールド効果が漸次失われる経時変化を起
こすこと、及び特に人工繊維布を用いた場合は、その本
体から発生すると見られる電子的エネルギによって電磁
波遮蔽吸収能力の極端な低下が見られること等を理由
に、金属含有集電体には含まれないものとする。他方金
属含有集電体として、複数の間隙をおいて張設された金
属製部材を用いることもできる。そのようなものとして
は、一方向に各平行に金属製部材が配設される平行パタ
ーンのような構成(このような構成は遮蔽吸収しようと
する電磁波が低周波帯域の場合に特に有効である)や、
間隙を開けながら金属製部材が渦巻き状に配設されたも
の、或いは各平行に並べられた2方向から互いに交わる
ように配設された金属メッシュ、エキスパンドメタル又
はメタルラスなどがある(アルミ等の場合、圧着による
メッシュ、グリッド、平行パターン等でも良い)。更に
これらの間隙のピッチを調整することで、後述するよう
に、遮蔽吸収する周波数帯域を変化させることができ
る。
Therefore, an electromagnetic wave shielding / absorbing material according to the present invention comprises a sheet of carbon material containing powder or fine particles of carbon or carbon-containing material, and a carbon material sheet attached to at least one surface of the carbon material sheet. And a metal-containing current collector attached thereto. The carbon material sheet is specially bonded to, for example, a powder obtained by pulverizing charcoal or the like or a powder of these powders (which can be obtained by colliding powders at high speed). An agent (conductive bond or the like) may be mixed and subjected to compression processing to form a sheet. Of course, if the material contains carbon other than charcoal, a high electromagnetic wave shielding effect in a high frequency band and a low frequency band can be obtained. The metal-containing current collector is made of a conductive metal such as gold, silver, copper, aluminum, nickel, or iron or an alloy thereof, for example, a metal plate, a metal foil, a metal-plated substrate, or a metal deposited. Or a fibrous material (eg, paper) impregnated with the metal particles.
However, as will be described later, the cloth changes its volume while accumulating the history of moisture absorption and drying, and the cloth changes at this time (movement). Causing crack separation and partial insulation
The above-mentioned history of moisture absorption and drying causes thinning of the fibrous material, and the carbon material peeled off as described above from the gaps due to the peeling of the close contact surface with the carbon material sheet accompanying the volume change of the cloth. The carbon or carbon-containing material of the sheet gradually departs, causing a temporal change in which the electromagnetic wave shielding effect is gradually lost, and in particular, when an artificial fiber cloth is used, the electromagnetic wave is shielded by the electronic energy which is expected to be generated from the main body. It is not included in the metal-containing current collector because the absorption capacity is extremely reduced. On the other hand, as the metal-containing current collector, a metal member stretched with a plurality of gaps can be used. As such, a configuration like a parallel pattern in which metal members are arranged in parallel in one direction (such a configuration is particularly effective when electromagnetic waves to be shielded and absorbed are in a low frequency band). )
There are metal members arranged spirally with a gap, or metal mesh, expanded metal or metal lath arranged so as to cross each other from two directions arranged in parallel (in the case of aluminum etc.) , A mesh by pressing, a grid, a parallel pattern, etc.). Further, by adjusting the pitch of these gaps, the frequency band to be shielded and absorbed can be changed as described later.

【0005】また上記構成とは別に、次のような構成も
本発明の電磁波遮蔽吸収材として用いることもできる。
即ち、本発明に係る他の電磁波遮蔽吸収材として、多数
の空隙で構成されるポーラスな金属含有集電体と、少な
くともその空隙に充填された粉末状乃至微粒子状の炭素
乃至炭素含有物とを有することを特徴としている。この
構成における金属含有集電体としては、内部に多数の空
隙を有するポーラスなものが良く、発泡金属、レジスト
の露光及び感光により得られる導電性金属パターン(平
行パターンや渦巻きパターン等形状は自由)で構成され
るもの、金属を含有する導電性インクを用いたスクリー
ン印刷や超厚盛り印刷(株式会社ヒルタコーポレーショ
ンにより特許出願中のもの等がある)によって得られる
平行パターン乃至格子状のもの(特にハニカム構造のも
の)等を用いることができる。また上記粉末状乃至微粒
子状の炭素乃至炭素含有物は、その空隙に充填されるだ
けでなく、更に上記金属含有集電体の外面を覆う場合
(該金属含有集電体が外部に露出しない状態の場合)で
も、後述するように、所定の電磁波遮蔽吸収効果が得ら
れる。本構成では、金属含有集電体と上記状態の炭素乃
至炭素含有物との間に欠落のない密着状態が確保される
ことで、電磁波遮蔽吸収効果はより高いものとなる(請
求項1乃至4の構成についても同じ)が、上記ハニカム
構造の金属含有集電体を用いると、金属含有集電体と粉
末状乃至微粒子状の炭素乃至炭素含有物との接触面積が
増え、後述するように、電磁波シールド効果が更に向上
することになる。このハニカム構造の場合、その内壁面
に導通部を設けて、各空隙に充填されている粉末状乃至
微粒子状の炭素乃至炭素含有物が隣接する間でブリッジ
結合できるようにした構成のものが使用されると、粉末
状乃至微粒子状の炭素乃至炭素含有物の電磁波を吸収遮
蔽する容量が増大し、前記電磁波シールド効果の向上が
顕著になる。また金属を含有する導電性インクを用いた
超厚盛り印刷によって得られる格子状のもの(もちろん
上記ハニカム構造のものも含む)が用いられた場合、ア
スペクト比の高い金属含有集電体の壁面が形成されるこ
とになるため、上記と同様に、金属含有集電体と粉末状
乃至微粒子状の炭素乃至炭素含有物との接触面積が増
え、結果的に電磁波シールド効果が向上することにな
る。本構成の場合も、遮蔽吸収しようとする周波数帯域
に応じて、前記空隙のピッチの異なるものを用いると、
特定の周波数の電磁波遮蔽吸収効果を一段と高めること
ができるようになる。
[0005] Apart from the above configuration, the following configuration can also be used as the electromagnetic wave shielding / absorbing material of the present invention.
That is, as another electromagnetic wave shielding / absorbing material according to the present invention, a porous metal-containing current collector composed of a large number of voids, and at least powdery or fine-particle carbon or carbon-containing material filled in the voids. It is characterized by having. As the metal-containing current collector in this configuration, a porous current collector having a large number of voids therein is preferable, and a conductive metal pattern obtained by exposing and exposing a foam metal, a resist (a shape such as a parallel pattern or a spiral pattern is free). Or a parallel pattern or a lattice-like pattern obtained by screen printing or super thick printing using a metal-containing conductive ink (including a patent pending by Hilta Corporation) (especially And a honeycomb structure) can be used. In addition, the powdery or particulate carbon or carbon-containing material not only fills the voids but also covers the outer surface of the metal-containing current collector (a state in which the metal-containing current collector is not exposed to the outside). In this case, a predetermined electromagnetic wave shielding / absorbing effect can be obtained as described later. In this configuration, the electromagnetic wave shielding / absorbing effect is further enhanced by ensuring a close contact state between the metal-containing current collector and the carbon or the carbon-containing material in the above-described state without any loss (claims 1 to 4). The same applies to the configuration of), but when the metal-containing current collector having the honeycomb structure is used, the contact area between the metal-containing current collector and powdery or fine-particle carbon or carbon-containing material increases, and as described below, The electromagnetic wave shielding effect is further improved. In the case of this honeycomb structure, a structure in which a conductive portion is provided on the inner wall surface thereof so that the powdery or particulate carbon or carbon-containing material filled in each void can be bridge-bonded between adjacent ones is used. Then, the capacity of absorbing or shielding the electromagnetic waves of the powdery or particulate carbon or carbon-containing material increases, and the improvement of the electromagnetic shielding effect becomes remarkable. When a grid-like material obtained by super-thick printing using a metal-containing conductive ink (including the above-described honeycomb structure) is used, the wall surface of the metal-containing current collector having a high aspect ratio is reduced. As a result, the contact area between the metal-containing current collector and the powdery or fine-particle carbon or carbon-containing material is increased, as a result, and as a result, the electromagnetic wave shielding effect is improved. Also in the case of the present configuration, depending on the frequency band to be shielded and absorbed, using a different pitch of the gap,
The effect of shielding and absorbing electromagnetic waves of a specific frequency can be further enhanced.

【0006】[0006]

【作用】以上詳述した本発明の構成では、後述する実験
から明らかなように、金属含有集電体に間隙乃至空隙の
ない構成の場合でも、50MHz付近からそれ以上の帯
域において電磁波のシールド効果が高く、他方それに間
隙乃至空隙のある構成の場合は、後述するように、その
ピッチによって、それよりも低い帯域においても電磁波
シールド効果を維持することができる。また金属板単体
で得られる電磁波シールド効果や炭素乃至炭素含有物単
体で得られる同効果或いはこれらの粉末や微粒子状の構
成単体で得られる同効果と比べても、格段にその効果は
高くなる。この違いは、金属含有集電体自身が、電磁波
の集電部としてのみ作用し、更に炭素乃至炭素含有物は
負荷抵抗として作用するからであると推測される。即
ち、粉末状乃至微粒子状の炭素乃至炭素含有物は、粉末
状乃至微粒子状であるが故に比表面積が大きく且つ振動
し易い状態になっており、これらが電磁波を吸収した場
合、隣接する間で互いに振動しつつ熱エネルギに変換す
る機能を本来的に有しており、特に上記集電部がある場
合は、その機能(負荷抵抗としての機能)が何十倍にも
増幅されて作用するからと推測される(従って集電部に
は、そのようなエネルギ変換による電磁波遮蔽吸収効果
があるわけではない)。そのため炭素乃至炭素含有物
は、接地しなくても、高いシールド効果が得られるよう
になる(もちろん接地した方がその効果が高くなる)。
またこのような効果は、集電部が外部に露出していなく
ても内部に充填されていさえすれば得られ、更に炭素材
シートの少なくとも一面に金属含有集電体が貼着せしめ
られていれば、同様に得られることができる。本構成の
もう一つの特徴は、遮蔽吸収できる電磁波のレンジが高
周波帯域に限られないことである。即ち上述のように、
上記金属含有集電体における間隙乃至空隙のピッチの調
整によっては、1MHzのような低周波帯域において
も、効率的に電磁波の遮蔽吸収が行われることになる。
According to the structure of the present invention described above, even if the metal-containing current collector has no gaps or voids, the shielding effect of the electromagnetic wave in the band from about 50 MHz to more than 100 MHz, as will be apparent from the experiments described later. In the case of a configuration having a high gap and a gap or a gap, the pitch can maintain the electromagnetic wave shielding effect even in a lower band, as described later. Further, the effect is significantly higher than the electromagnetic wave shielding effect obtained by a single metal plate, the same effect obtained by a carbon or a carbon-containing substance alone, or the same effect obtained by a powder or fine particle constituent alone. This difference is presumed to be due to the fact that the metal-containing current collector itself acts only as a current collector for electromagnetic waves, and that carbon or carbon-containing substances act as load resistance. That is, the powdery or particulate carbon or carbon-containing material has a large specific surface area and is easily vibrated because it is in a powdery or particulate form, and when these absorb electromagnetic waves, they may be adjacent to each other. It inherently has a function of converting heat energy while vibrating with each other. Especially when the above-mentioned current collector is provided, its function (function as a load resistance) is amplified by several tens of times and acts. (Therefore, the current collector does not have the electromagnetic wave shielding and absorbing effect by such energy conversion). Therefore, carbon or a carbon-containing substance can obtain a high shielding effect without being grounded (of course, the effect is higher when grounded).
In addition, such an effect can be obtained as long as the current collector is not exposed to the outside, as long as the current collector is filled inside, and the metal-containing current collector is attached to at least one surface of the carbon material sheet. If it can be obtained similarly. Another feature of this configuration is that the range of electromagnetic waves that can be shielded and absorbed is not limited to the high frequency band. That is, as described above,
By adjusting the pitch of the gaps or voids in the metal-containing current collector, the electromagnetic waves can be efficiently shielded and absorbed even in a low-frequency band such as 1 MHz.

【0007】[0007]

【発明の実施の形態】以下本発明の一実施形態を添付図
面に基づき説明する。図1は、本発明の電磁波遮蔽吸収
材の一実施形態構成を示す断面図である。図中1aは炭
素材シート、2aは金属含有集電体を示している。前記
炭素材シート1aは、備長炭を粉砕機で粉砕し、接着剤
を混ぜて圧縮加工機により圧縮加工してシート状にした
ものからなる。前記金属含有集電体2aは、0.3mm
厚のアルミニウム箔で構成されており、炭素材シート1
aの片面に貼着されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an embodiment of the electromagnetic wave shielding / absorbing material of the present invention. In the figure, 1a indicates a carbon material sheet, and 2a indicates a metal-containing current collector. The carbon material sheet 1a is formed by pulverizing Bincho charcoal with a pulverizer, mixing an adhesive, and compressing with a compression processing machine to form a sheet. The metal-containing current collector 2a is 0.3 mm
It is composed of thick aluminum foil and has a carbon material sheet 1
a is attached to one side.

【0008】図2は、備長炭のみ(備長炭固体)、備長
炭を粉砕して接着剤を混ぜて圧縮加工しシート状にした
もの(炭素シート)、0.3mm厚のアルミニウム箔の
み(ALシート)、備長炭を粉砕せずその一面に0.3
mm厚のアルミニウム箔を貼り付けたもの(ALシート
+備長炭固体)、及び本実施形態構成に係る上記電磁波
遮蔽吸収材(ALシート+炭素シート)における電磁波
のシールド実験を行なった結果を示すグラフである。こ
れらの実験結果から明らかなように、備長炭のみ及び備
長炭を粉砕して接着剤を混ぜて圧縮加工しシート状にし
たものは、殆どどの波長でも遮蔽吸収効果はないと言っ
て良い。またアルミニウム箔のみの構成及び備長炭を粉
砕せずその一面にアルミニウム箔を貼り付けた構成の場
合、以上のものよりシールド効果は高くなっているが、
どの帯域でも、50dB以上のシールド効果は得られて
いない。これに対し、本構成の電磁波遮蔽吸収材では、
130MHz付近からそれ以上の帯域において、50d
b以上と高いシールド効果が得ていることが分かる。
[0008] Fig. 2 shows Bincho charcoal only (Bincho charcoal solid), Bincho charcoal crushed, mixed with an adhesive, compressed and formed into a sheet (carbon sheet), only 0.3 mm thick aluminum foil (AL Sheet), 0.3cm on one side without crushing Bincho charcoal
A graph showing the results of electromagnetic wave shielding experiments performed on an aluminum foil having a thickness of mm (AL sheet + bincho charcoal solid) and the electromagnetic wave shielding / absorbing material (AL sheet + carbon sheet) according to the present embodiment. It is. As is clear from these experimental results, it can be said that the bincho charcoal alone and the one obtained by pulverizing the bincho charcoal, mixing with an adhesive, and compressing the sheet into a sheet form have no shielding and absorbing effect at almost any wavelength. In addition, in the case of a configuration of only aluminum foil and a configuration in which aluminum foil is stuck on one side without crushing Bincho charcoal, the shielding effect is higher than the above,
No shielding effect of 50 dB or more was obtained in any band. On the other hand, in the electromagnetic wave shielding and absorbing material of this configuration,
In the band from around 130 MHz and beyond, 50d
It can be seen that a high shielding effect of at least b is obtained.

【0009】次に本構成の金属含有集電体の構成とし
て、3cmピッチの銅製メッシュ及び30cmの間隔を
おいて銅線を平行に配設した銅線平行パターンを用い、
1GHz及び1MHzの各帯域における電磁波シールド
効果を調べる実験を行なった。またその比較例として、
0.3mm厚の銅箔を用いて同じ帯域における電磁波シ
ールド効果を調べる実験も併せて行なった。
Next, as a configuration of the metal-containing current collector of the present configuration, a copper mesh having a pitch of 3 cm and a copper wire parallel pattern in which copper wires are arranged in parallel with a spacing of 30 cm are used.
An experiment was conducted to examine the electromagnetic wave shielding effect in each band of 1 GHz and 1 MHz. As a comparative example,
An experiment for examining the electromagnetic wave shielding effect in the same band using a 0.3 mm thick copper foil was also conducted.

【0010】その結果、1GHzの高周波帯域において
銅製メッシュの構成のものは、43dB、銅箔の構成の
ものは35dBであり、また1MHzの低周波帯域にお
いて銅線平行パターンの構成のものは、40dB、銅箔
の構成のものは25dBであった。
As a result, in the high frequency band of 1 GHz, the copper mesh configuration is 43 dB, the copper foil configuration is 35 dB, and the copper wire parallel pattern configuration in the 1 MHz low frequency band is 40 dB. The composition of the copper foil was 25 dB.

【0011】以上の結果から、メッシュ乃至平行パター
ンのピッチを調整することで、効率良く遮蔽吸収できる
周波数帯域を変化させることができ、しかもそのピッチ
の調整の仕方によっては、1MHzのような低周波帯域
でも電磁波の遮蔽吸収効果を維持することができること
が分かる。
From the above results, by adjusting the pitch of the mesh or the parallel pattern, it is possible to change the frequency band in which shielding and absorption can be performed efficiently, and depending on how the pitch is adjusted, a low frequency such as 1 MHz can be obtained. It can be seen that the effect of shielding and absorbing electromagnetic waves can be maintained even in the band.

【0012】以上のアルミニウム箔や銅製メッシュの
他、鋼製のメッシュ、亜鉛、Al、亜鉛及びAl合金が
メッキされたメッシュ、銅製又は鋼製のエキスパンドメ
タルやメタルラス或いは亜鉛、Al、亜鉛及びAl合金
がメッキされたエキスパンドメタルやメタルラス等が、
金属含有集電体2として用いられても、同様な効果を得
ることが可能なことが、本発明者等の他の実験により確
認された。
In addition to the above-mentioned aluminum foil and copper mesh, steel mesh, mesh plated with zinc, Al, zinc and Al alloy, copper or steel expanded metal or metal lath or zinc, Al, zinc and Al alloy Expanded metal or metal lath etc.
It has been confirmed by other experiments by the present inventors that similar effects can be obtained even when used as the metal-containing current collector 2.

【0013】また金属含有集電体2aに、銅箔を用いた
もの(銅箔+炭素シート)や、該金属粒子を含浸させた
ポリエステル等の化学繊維質のもの(化学繊維+炭素シ
ート)、更に該金属粒子を含浸させた木綿布を用いたも
の(木綿布を用いた金属含有集電体+炭素シート)を利
用して、10MHz〜1GHz帯域における電磁波遮蔽
吸収効果の変化を調べる実験を行った。尚、木綿布を用
いた構成の場合については、繊維の乾燥と吸湿(湿度3
5%〜100%)の交互の履歴500サイクル(6h/
サイクル)を加えてテストすることを併せて行った(乾
湿500サイクル経時後)。図3はその時の実験結果を
示している。それによれば、上記銅箔の場合は、時間が
経過しても特にその効果に変化は見られなかった。これ
に対し、化学繊維質のものは、最初から電磁波遮蔽吸収
効果が小さく、また木綿布の場合は、経時変化による電
磁波遮蔽吸収性能の低下が見られた。これは、化学繊維
質のものの場合、そのものから発せられると見られる電
子的エネルギにより、電磁波遮蔽吸収する能力が大幅に
低下するからと考えられる。また木綿布を用いた金属含
有集電体の場合は、湿潤・乾燥を繰り返すうちに繊維組
織の変化及び各方向(縦方向、横方向、対角線方向)に
作用させた荷重のために繊維質が細り、その隙間から、
剥離していた炭素材シートの炭素乃至炭素含有物が次第
に離脱して、経時変化を起こすからと考えられる。
A metal-containing current collector 2a using a copper foil (copper foil + carbon sheet), a synthetic fiber material such as polyester impregnated with the metal particles (chemical fiber + carbon sheet), Further, an experiment was conducted to examine the change in the electromagnetic wave shielding and absorbing effect in the 10 MHz to 1 GHz band using a cotton cloth impregnated with the metal particles (a metal-containing current collector using a cotton cloth + a carbon sheet). Was. Incidentally, in the case of a configuration using a cotton cloth, drying and moisture absorption of the fiber (humidity 3
5% to 100%) alternate history 500 cycles (6h /
Cycle) was added to the test (after 500 cycles of dry and wet cycles). FIG. 3 shows the experimental result at that time. According to this, in the case of the above-mentioned copper foil, the effect was not particularly changed even after the passage of time. On the other hand, the chemical fiber material had a small electromagnetic wave shielding / absorbing effect from the beginning, and in the case of cotton cloth, the electromagnetic wave shielding / absorbing performance was deteriorated due to aging. This is considered to be due to the fact that in the case of a synthetic fiber material, the ability to shield and absorb electromagnetic waves is greatly reduced by electronic energy that is supposed to be emitted from itself. In the case of a metal-containing current collector using a cotton cloth, the fibrous material changes due to the change in the fiber structure and the load applied in each direction (longitudinal, lateral, and diagonal directions) during repeated wetting and drying. From the gap,
It is considered that the carbon or the carbon-containing material of the carbon material sheet which has been peeled off gradually comes off and changes with time.

【0014】図4は、本発明の他の実施形態に係る電磁
波遮蔽吸収材の構成を示す断面図である。図中1bは微
粒子状の炭素、2bは金属含有集電体を各示している。
上記炭素1bは、備長炭の粉末同士を、更に高速に衝突
させて微粒子状になったもので構成されている。この微
粒子状の炭素1bは、後述するように、金属含有集電体
2bの空隙に充填される。上記金属含有集電体2bは、
多数の空隙で構成されるポーラスな金属乃至金属含有物
からなる。本構成では、導電性インクを用いた超厚盛り
印刷によって格子状又は平行線状に成形されたもの(図
面上は格子状のものが示されている)が用いられてい
る。即ち、水溶性紙、不燃紙、樹脂板、炭素粒シート等
の平面上に導電性インクを使用して導電金属部を超厚盛
り印刷し、格子状又は平行線状に金属含有集電体2bを
形成する。この格子状又は平行線状の金属含有集電体2
bに、炭素粒1bを導電性接着剤と混合して加圧挿入
し、金属含有集電体2bと結合させる。他の製造方法と
しては、超厚盛り印刷により準備された金属含有集電体
2bを、別途に準備された炭素シートの片面に、導電性
接着剤を用いて接着して積層加工する(もちろん両面に
貼り付けても良い)。尚、水溶性紙を使用した場合に
は、金属含有集電体を形成させた後に水洗いによって水
溶性紙を溶解除去し、金属含有集電体のみを残して超精
密金属含有集電体を形成し、これに炭素シート又は導電
性炭素ペーストを接着又は加圧挿入して製品化が可能と
なる。このように超厚盛り印刷による場合は、格子状又
は平行線状の金属含有集電体が1cmの高さのものも形
成することができる。また印刷による場合は、鉄、ニッ
ケル、銅、アルミニウム、金、銀等の微粉末を目的に合
わせて調合することで、金属含有集電体2bを形成する
ことができる。更に上記インクに調合される導電性接着
剤の種類によっては硬度の高いものから柔軟性の高いも
のが印刷可能で、可撓性のある電磁波遮蔽吸収材の生産
が可能となる。
FIG. 4 is a sectional view showing the structure of an electromagnetic wave shielding / absorbing material according to another embodiment of the present invention. In the figure, 1b indicates fine carbon particles, and 2b indicates a metal-containing current collector.
The carbon 1b is made of particles of Bincho charcoal made to collide with each other at a higher speed to form fine particles. The fine particles of carbon 1b are filled in the voids of the metal-containing current collector 2b as described later. The metal-containing current collector 2b includes:
It is made of a porous metal or metal-containing material composed of a large number of voids. In the present configuration, one formed in a lattice shape or a parallel line shape by super-thick printing using conductive ink (the lattice shape is shown in the drawings) is used. That is, the conductive metal portion is super-thickly printed using a conductive ink on a plane such as water-soluble paper, non-combustible paper, a resin plate, or a carbon particle sheet, and the metal-containing current collector 2b is formed in a grid or parallel lines. To form This grid-shaped or parallel-lined metal-containing current collector 2
b, carbon particles 1b are mixed with a conductive adhesive and inserted under pressure to bond with the metal-containing current collector 2b. As another manufacturing method, a metal-containing current collector 2b prepared by super-thick printing is adhered to one side of a separately prepared carbon sheet using a conductive adhesive and laminated (of course, both sides are processed). May be pasted on). When a water-soluble paper is used, after forming the metal-containing current collector, the water-soluble paper is dissolved and removed by washing with water to form an ultra-precision metal-containing current collector while leaving only the metal-containing current collector. Then, a carbon sheet or a conductive carbon paste is adhered or inserted under pressure to this to enable commercialization. As described above, in the case of super thick printing, a grid-shaped or parallel-line metal-containing current collector having a height of 1 cm can be formed. In the case of printing, the metal-containing current collector 2b can be formed by mixing fine powders of iron, nickel, copper, aluminum, gold, silver and the like according to the purpose. Further, depending on the kind of the conductive adhesive prepared in the ink, a material having a high hardness to a material having a high flexibility can be printed, and a flexible electromagnetic wave shielding and absorbing material can be produced.

【0015】図5は、微粒子状の備長炭を更にシート状
にしたもの(炭素シート)、銅粉とニッケル粉を混合し
て作成された導電性インクを用いた超厚盛り印刷によっ
て、厚み150μm、アスペクト比8〜10程度の格子
状に成形された金属含有集電体2b単体を用いたもの
(超厚盛印刷金属含有集電体)、及び本実施形態に係る
上記電磁波遮蔽吸収材(超厚盛印刷金属含有集電体+炭
素微粒子)を用いて行った電磁波シールド実験の結果を
示すグラフである。これらの実験結果から明らかなよう
に、微粒子状の備長炭をシート状にしたものの場合は、
殆どどの波長でも電磁波遮蔽吸収効果はないと言って良
い。他方導電性インクを用いた超厚盛り印刷によって成
形された格子状の金属含有集電体2b単体の構成の場
合、50MHz以上であれば、20db〜23db程度
のシールド効果が得られている。これに対し、本構成の
電磁波遮蔽吸収材では、50MHz付近からそれ以上の
帯域において、50db以上と高いシールド効果を得て
いることが分かる。これは、集電部を構成する金属含有
集電体2bと負荷抵抗となる微粒子状の炭素1bとの組
み合わで、電磁波遮蔽吸収効果が得られるが、更に超厚
盛り印刷によって、アスペクト比の高い金属含有集電体
2bの壁面からなる格子が形成されることで、該金属含
有集電体2bと微粒子状の炭素1bとの接触面積が増え
ることになり、電磁波シールド効果がより一層向上する
ことになるからと考えられる。
[0015] Fig. 5 is a diagram showing a fine sheet of charcoal charcoal (carbon sheet) and a thickness of 150 µm by ultra-thick printing using a conductive ink prepared by mixing copper powder and nickel powder. Using a metal-containing current collector 2b alone formed in a lattice shape having an aspect ratio of about 8 to 10 (super-thick printed metal-containing current collector), and the electromagnetic wave shielding / absorbing material (super It is a graph which shows the result of the electromagnetic wave shielding experiment performed using the current collector containing the thick printing metal + carbon fine particle). As is evident from these experimental results, in the case of finely divided Bincho charcoal in the form of a sheet,
It can be said that there is no electromagnetic wave shielding and absorbing effect at almost any wavelength. On the other hand, in the case of the configuration of the lattice-shaped metal-containing current collector 2b alone formed by super-thick printing using conductive ink, a shielding effect of about 20 to 23 db is obtained at 50 MHz or more. On the other hand, it can be seen that the electromagnetic wave shielding / absorbing material of this configuration achieves a high shielding effect of 50 db or more in the band from around 50 MHz and beyond. This is because the electromagnetic wave shielding and absorbing effect can be obtained by the combination of the metal-containing current collector 2b constituting the current collector and the fine carbon particles 1b serving as the load resistance, but the aspect ratio is further increased by the super thick printing. By forming a grid consisting of the wall surfaces of the metal-containing current collector 2b, the contact area between the metal-containing current collector 2b and the fine carbon particles 1b is increased, and the electromagnetic wave shielding effect is further improved. It is thought that it becomes.

【0016】次に本構成における金属含有集電体2bの
構成として、銅粉とニッケル粉を混合して含む導電性イ
ンクを用いた超厚盛り印刷によって3cmピッチの格子
状に形成された構成及び同様に超厚盛り印刷によって3
0cmの間隔をおいて平行に配設された平行パターンの
構成を用い、1GHz及び1MHzの各帯域における電
磁波シールド効果を調べる実験を行なった。またその比
較例として、0.3mm厚の銅箔を用いて同じ帯域にお
ける電磁波シールド効果を調べる実験も併せて行なっ
た。
Next, as a configuration of the metal-containing current collector 2b in the present configuration, a configuration in which a 3 cm pitch lattice is formed by super-thick printing using a conductive ink containing a mixture of copper powder and nickel powder. Similarly, 3
An experiment was conducted to examine the electromagnetic wave shielding effect in each band of 1 GHz and 1 MHz, using a configuration of parallel patterns arranged in parallel with an interval of 0 cm. As a comparative example, an experiment for examining the electromagnetic wave shielding effect in the same band using a copper foil having a thickness of 0.3 mm was also performed.

【0017】その結果、1GHzの高周波帯域において
格子状構成のものは、58dB、銅箔の構成のものは3
5dBであり、また1MHzの低周波帯域において平行
パターンの構成のものは、52dB、銅箔の構成のもの
は25dBであった。
As a result, in the high frequency band of 1 GHz, the lattice configuration is 58 dB and the copper configuration is 3 dB.
In the low frequency band of 1 MHz, the parallel pattern configuration was 52 dB, and the copper foil configuration was 25 dB.

【0018】以上の結果から、格子ピッチ乃至平行パタ
ーンピッチを調整することで、効率良く遮蔽吸収できる
周波数帯域を変化させることができ、しかもそのピッチ
の調整の仕方によっては、1MHzのような低周波帯域
でも電磁波の遮蔽吸収効果を維持することができること
が分かる。
From the above results, by adjusting the grating pitch or the parallel pattern pitch, it is possible to change the frequency band in which shielding and absorption can be performed efficiently. In addition, depending on the manner of adjusting the pitch, a low frequency such as 1 MHz can be used. It can be seen that the effect of shielding and absorbing electromagnetic waves can be maintained even in the band.

【0019】以上の他、金、銀、銅、アルミニウム、ニ
ッケル、鉄等の導電性の金属乃至これらの合金を用い、
これらの発泡金属、レジストの露光及び感光により得ら
れる上記金属のパターンで構成されるもの、上記金属を
含有する導電性インクを用いたスクリーン印刷によって
得られる格子状のもの等が、金属含有集電体2bとして
用いられても、同様な効果を得ることが可能なことが、
本発明者等の実験により確認された。
In addition to the above, conductive metals such as gold, silver, copper, aluminum, nickel and iron or alloys thereof are used.
These foamed metals, those composed of the above-mentioned metal pattern obtained by exposure and exposure of a resist, lattice-like ones obtained by screen printing using a conductive ink containing the above-mentioned metal, and the like, include metal-containing current collectors. Even when used as the body 2b, it is possible to obtain the same effect,
It was confirmed by experiments by the present inventors.

【0020】また図6に示されるように、上記微粒子状
の炭素1b(粉末状の炭素や粉末状乃至微粒子状の炭素
含有物も同じものと推測される)は、図7(a)(b)に示
されるように、金属含有集電体2bの空隙に充填される
だけでなく、更に同図(c)(d)に示されるように、上記
金属含有集電体2bの外面を覆う場合(該金属含有集電
体が外部に露出しない状態の場合)でも、電磁波のシー
ルド効果に、殆ど差違が見られない。
As shown in FIG. 6, the fine carbon particles 1b (the same applies to powdered carbon and powdered or fine carbonaceous materials) are shown in FIGS. 7 (a) and 7 (b). As shown in ()), not only are the voids of the metal-containing current collector 2b filled, but also the outer surface of the metal-containing current collector 2b is covered as shown in FIGS. Even in the case where the metal-containing current collector is not exposed to the outside, there is almost no difference in the electromagnetic wave shielding effect.

【0021】更に本発明者等は、超厚盛り印刷により、
金属含有集電体2bをハニカム構造に成形し、その空隙
に微粒子状の炭素1bを充填した電磁波遮蔽吸収材を作
成し、その電磁波シールド効果について調べる実験を行
った。図8は、その場合の実験結果を示している。同図
によれば、金属含有集電体2bをハニカム構造とするこ
とで、金属含有集電体2bと微粒子状炭素1bとの接触
面積が増えとことにより、電磁波シールド効果がより高
くなっていることが分かる。
Further, the present inventors have developed a super thick print,
The metal-containing current collector 2b was formed into a honeycomb structure, an electromagnetic wave shielding / absorbing material in which voids were filled with fine carbon particles 1b was prepared, and an experiment was conducted to examine the electromagnetic wave shielding effect. FIG. 8 shows an experimental result in that case. According to the figure, since the metal-containing current collector 2b has a honeycomb structure, the contact area between the metal-containing current collector 2b and the particulate carbon 1b is increased, so that the electromagnetic wave shielding effect is further enhanced. You can see that.

【0022】以上の他、本構成は、金属含有集電体の集
電による静電気防除効果、炭素材による放電機能を持
ち、更に炭素素材として備長炭を用いれば、備長炭から
強力なマイナスイオンを発生し、空気を清浄化する効果
を持つ。また備長炭による臭気を吸収する脱臭効果、湿
度を吸収する効果もある。
In addition to the above, the present configuration has a static electricity control effect by current collection of a metal-containing current collector and a discharge function by a carbon material. Further, if Bincho charcoal is used as a carbon material, strong negative ions can be generated from Bincho charcoal. Generates and has the effect of purifying air. It also has the deodorizing effect of absorbing odors from Bincho charcoal and the effect of absorbing humidity.

【0023】また本電磁波遮蔽吸収材の用途としては、
家電や電子機器等から発生する電磁波の人体への影響を
なくすために、これらのケース等に張り付けたり、エプ
ロン等のように保護すべき人体に直接まとったりして、
使用すると良い。またこれらの機器から発生する電磁波
が他の機器へ影響することを防止する(誤動作防止)観
点より、例えば飛行機内の航行用電子機器等を設置する
空間と客室を仕切る空間の内装材として、或いは医療用
機器と一般病室を仕切る病院の内装材として使用しても
良い。もちろん建築用内装材や自動車用内装材として用
いることにより、上記の効果と、空気の清浄化効果、脱
臭効果、吸湿効果等も得られる。
The use of the electromagnetic wave shielding / absorbing material is as follows.
In order to eliminate the effects of electromagnetic waves generated from home appliances and electronic devices on the human body, attach them to these cases, etc., or wear them directly on the human body to be protected such as an apron, etc.
Good to use. In addition, from the viewpoint of preventing electromagnetic waves generated from these devices from affecting other devices (preventing malfunction), for example, as an interior material of a space that separates a cabin between a space where an electronic device for navigation in an airplane is installed and a cabin, or It may be used as an interior material of a hospital that separates medical equipment and general hospital rooms. Of course, when used as a building interior material or an automobile interior material, the above-mentioned effects, the air cleaning effect, the deodorizing effect, the moisture absorbing effect, and the like can be obtained.

【0024】[0024]

【発明の効果】以上詳述した本発明の電磁波遮蔽吸収材
の構成によれば、粉末状乃至微粒子状の炭素乃至炭素含
有物が、電磁波を受けた際に、隣接する間で互いに振動
しつつ熱エネルギに変換する機能を本来的に有してお
り、それに金属含有集電体による集電部が組み合わされ
て、その機能が何十倍にも増幅されて作用するため、接
地しなくても、50MHz付近からそれ以上の帯域の電
磁波について、これまでになく高い率で、吸収・遮蔽す
ることが可能になる。また請求項4乃至9項に示した構
成のように、間隙乃至空隙のピッチの調整の仕方によっ
ては、上記のような高周波帯域だけでなく、低周波帯域
における電磁波の遮蔽吸収が高いレベルで行われること
になる。
According to the structure of the electromagnetic wave shielding / absorbing material of the present invention described in detail above, when the powdery or fine particles of carbon or carbon-containing material receive an electromagnetic wave, they vibrate each other between adjacent ones. It inherently has the function of converting to heat energy, and it is combined with a current collector with a metal-containing current collector, and its function is amplified tens of times. , From about 50 MHz to higher frequencies can be absorbed and shielded at an unprecedented rate. In addition, depending on the manner of adjusting the pitch of the gap or the gap, the shielding and absorption of the electromagnetic wave in the low-frequency band as well as the high-frequency band is controlled at a high level depending on the manner of adjusting the pitch of the gap or the gap. Will be

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の電磁波遮蔽吸収材の一実施形態構成を
示す断面図である。
FIG. 1 is a cross-sectional view showing an embodiment of the electromagnetic wave shielding / absorbing material of the present invention.

【図2】電磁波のシールド比較実験結果を示すグラフで
ある。
FIG. 2 is a graph showing the results of an electromagnetic wave shield comparison experiment.

【図3】金属含有集電体として銅板、金属粒子を含浸さ
せた化学繊維、同じく金属粒子を含浸させた木綿布を用
いた場合の電磁波遮蔽吸収効果の変化を調べる実験を行
った時の実験結果を示すグラフである。
FIG. 3 is an experiment when an experiment for examining a change in an electromagnetic wave shielding / absorbing effect when a copper plate, a chemical fiber impregnated with metal particles, and a cotton cloth impregnated with metal particles are used as a metal-containing current collector. It is a graph which shows a result.

【図4】本発明の他の実施形態に係る電磁波遮蔽吸収材
の構成を示す断面図である。
FIG. 4 is a cross-sectional view illustrating a configuration of an electromagnetic wave shielding / absorbing material according to another embodiment of the present invention.

【図5】微粒子状の備長炭をシート状にしたもの、超厚
盛り印刷によって格子状に成形された金属含有集電体単
体を用いたもの、及び本実施形態に係る上記電磁波遮蔽
吸収材を用いて行った電磁波シールド実験の結果を示す
グラフである。
FIG. 5 shows a sheet of fine bincho charcoal, a single metal-containing current collector formed into a grid by super-thick printing, and the electromagnetic wave shielding / absorbing material according to the present embodiment. 9 is a graph showing the results of an electromagnetic shielding experiment performed using the apparatus.

【図6】金属含有集電体が露出した構成と露出しない構
成の電磁波シールド効果の比較実験結果を示すグラフで
ある。
FIG. 6 is a graph showing the results of a comparative experiment of the electromagnetic wave shielding effect of a configuration where the metal-containing current collector is exposed and a configuration where the metal-containing current collector is not exposed.

【図7】金属含有集電体が露出した構成と露出しない構
成を示す説明図である。
FIG. 7 is an explanatory diagram showing a configuration in which a metal-containing current collector is exposed and a configuration in which it is not exposed.

【図8】金属含有集電体をハニカム構造に成形してその
空隙に微粒子状の炭素を充填した電磁波遮蔽吸収材に関
し電磁波シールド効果を調べる実験を行った際の実験結
果を示すグラフである。
FIG. 8 is a graph showing experimental results obtained when an experiment for examining an electromagnetic wave shielding effect was performed on an electromagnetic wave shielding / absorbing material in which metal-containing current collectors were formed into a honeycomb structure and the voids were filled with fine-particle carbon.

【符号の説明】[Explanation of symbols]

1a 炭素材シート 1b 微粒子状炭素 2a、2b 金属含有集電体 1a Carbon material sheet 1b Fine particulate carbon 2a, 2b Metal-containing current collector

Claims (9)

【特許請求の範囲】[Claims] 【請求項1】 粉末状乃至微粒子状の炭素乃至炭素含有
物をシート状にした炭素材シートと、該炭素材シートの
少なくとも一面に貼着された金属含有集電体とを有する
ことを特徴とする電磁波遮蔽吸収材。
1. A carbon material sheet in which powdery or particulate carbon or carbon-containing material is formed into a sheet, and a metal-containing current collector adhered to at least one surface of the carbon material sheet. Electromagnetic shielding material.
【請求項2】 請求項1記載の電磁波遮蔽吸収材におい
て、前記金属含有集電体として、金属板、金属箔、基材
に金属をメッキしたものや金属を蒸着させたもの、或い
は布を除く金属粒子を含浸させた繊維質で構成されるも
の又は複数の間隙をおいて張設される金属製部材を用い
ることを特徴とする請求項1記載の電磁波遮蔽吸収材。
2. The electromagnetic wave shielding / absorbing material according to claim 1, wherein the metal-containing current collector excludes a metal plate, a metal foil, a metal-plated material, a metal-deposited material, or a cloth. The electromagnetic wave shielding / absorbing material according to claim 1, wherein a material made of fibrous material impregnated with metal particles or a metal member stretched with a plurality of gaps is used.
【請求項3】 請求項2記載の電磁波遮蔽吸収材におい
て、複数の間隙をおいて張設される金属製部材で構成さ
れた前記金属含有集電体として、金属メッシュ、エキス
パンドメタル又はメタルラスを用いることを特徴とする
請求項2記載の電磁波遮蔽吸収材。
3. The electromagnetic wave shielding / absorbing material according to claim 2, wherein a metal mesh, an expanded metal or a metal lath is used as the metal-containing current collector composed of a metal member stretched with a plurality of gaps. The electromagnetic wave shielding / absorbing material according to claim 2, characterized in that:
【請求項4】 請求項3記載の電磁波遮蔽吸収材におい
て、遮蔽吸収しようとする周波数帯域に応じて、前記間
隙のピッチの異なるものを用いることを特徴とする請求
項3記載の電磁波遮蔽吸収材。
4. The electromagnetic wave shielding / absorbing material according to claim 3, wherein a pitch of the gap is different according to a frequency band to be shielded / absorbed. .
【請求項5】 多数の空隙で構成されるポーラスな金属
含有集電体と、少なくともその空隙に充填された粉末状
乃至微粒子状の炭素乃至炭素含有物とを有することを特
徴とする電磁波遮蔽吸収材。
5. An electromagnetic wave shielding and absorbing method comprising: a porous metal-containing current collector composed of a large number of voids; and powdery or fine particles of carbon or carbon-containing material filled in at least the voids. Wood.
【請求項6】 請求項5記載の電磁波遮蔽吸収材におい
て、ポーラスな前記金属含有集電体として、ハニカム構
造のものを用いることを特徴とする請求項5記載の電磁
波遮蔽吸収材。
6. The electromagnetic wave shielding / absorbing material according to claim 5, wherein the porous metal-containing current collector has a honeycomb structure.
【請求項7】 請求項6記載の電磁波遮蔽吸収材におい
て、ハニカム構造の前記金属含有集電体における、その
内壁面に導通部を設けて、各空隙に充填されている粉末
状乃至微粒子状の炭素乃至炭素含有物が隣接する間でブ
リッジ結合できるようにしたことを特徴とする請求項6
記載の電磁波遮蔽吸収材。
7. The electromagnetic wave shielding / absorbing material according to claim 6, wherein a conductive portion is provided on an inner wall surface of the metal-containing current collector having a honeycomb structure, and powdery or fine particles filled in each gap are provided. 7. The structure according to claim 6, wherein the carbon or carbon-containing material is capable of being bridge-bonded between adjacent ones.
The electromagnetic wave shielding / absorbing material according to the above.
【請求項8】 請求項5記載の電磁波遮蔽吸収材におい
て、金属を含有する導電性インクを用いた超厚盛り印刷
によって得られる格子状のものを、前記金属含有集電体
として用いることを特徴とする請求項5記載の電磁波遮
蔽吸収材。
8. The electromagnetic wave shielding / absorbing material according to claim 5, wherein a grid-like material obtained by super-thick printing using a metal-containing conductive ink is used as the metal-containing current collector. The electromagnetic wave shielding / absorbing material according to claim 5, wherein
【請求項9】 請求項5乃至8記載の電磁波遮蔽吸収材
において、遮蔽吸収しようとする周波数帯域に応じて、
前記空隙のピッチの異なるものを用いることを特徴とす
る請求項5乃至8記載の電磁波遮蔽吸収材。
9. The electromagnetic wave shielding / absorbing material according to claim 5, wherein:
9. The electromagnetic wave shielding / absorbing material according to claim 5, wherein said gaps having different pitches are used.
JP28249797A 1997-09-30 1997-09-30 Electromagnetic wave shielding/absorbing material Withdrawn JPH11112188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28249797A JPH11112188A (en) 1997-09-30 1997-09-30 Electromagnetic wave shielding/absorbing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28249797A JPH11112188A (en) 1997-09-30 1997-09-30 Electromagnetic wave shielding/absorbing material

Publications (1)

Publication Number Publication Date
JPH11112188A true JPH11112188A (en) 1999-04-23

Family

ID=17653215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28249797A Withdrawn JPH11112188A (en) 1997-09-30 1997-09-30 Electromagnetic wave shielding/absorbing material

Country Status (1)

Country Link
JP (1) JPH11112188A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020085025A (en) * 2001-05-04 2002-11-16 (주)성창산업 Composite and Mat Utilizing Thereof for Acoustic Insulation with Absorption Function of Electromagnetic Wave and Water-Vein Wave
JP2007299906A (en) * 2006-04-28 2007-11-15 Nitto Denko Corp Article equipped with electromagnetic wave shielding sheet-like structure
JP2007299907A (en) * 2006-04-28 2007-11-15 Nitto Denko Corp Structure having property of conducting or absorbing electromagnetic wave
JP2009283901A (en) * 2008-04-21 2009-12-03 Shin Etsu Polymer Co Ltd Cover lay film and flexible printed wiring board

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020085025A (en) * 2001-05-04 2002-11-16 (주)성창산업 Composite and Mat Utilizing Thereof for Acoustic Insulation with Absorption Function of Electromagnetic Wave and Water-Vein Wave
JP2007299906A (en) * 2006-04-28 2007-11-15 Nitto Denko Corp Article equipped with electromagnetic wave shielding sheet-like structure
JP2007299907A (en) * 2006-04-28 2007-11-15 Nitto Denko Corp Structure having property of conducting or absorbing electromagnetic wave
JP2009283901A (en) * 2008-04-21 2009-12-03 Shin Etsu Polymer Co Ltd Cover lay film and flexible printed wiring board

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