JP2811480B2 - Electromagnetic wave shielding material - Google Patents
Electromagnetic wave shielding materialInfo
- Publication number
- JP2811480B2 JP2811480B2 JP1273385A JP27338589A JP2811480B2 JP 2811480 B2 JP2811480 B2 JP 2811480B2 JP 1273385 A JP1273385 A JP 1273385A JP 27338589 A JP27338589 A JP 27338589A JP 2811480 B2 JP2811480 B2 JP 2811480B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- resins
- electromagnetic wave
- wave shielding
- synthetic
- 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.)
- Expired - Lifetime
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】 （従来の技術） OA用電子機器、産業用ロボット、産業用電子装置等は
外部から電磁波の影響を受け、また同時にそれ自体が外
部に電磁波を放射し、時として重大な誤作動の原因にも
なっている。このため、外界からの電磁波の影響を遮断
し、逆に外界に対して電磁波を漏洩しないよう、シール
ド用筐体（ハウジング）の材料として導電性の高い材
料、すなわち金属を使用するか、あるいは軽量化のため
に各種樹脂に金属繊維、金属粉などの金属フィラーをを
混入したものを使用している。DETAILED DESCRIPTION OF THE INVENTION (Prior Art) OA electronic devices, industrial robots, industrial electronic devices, etc. are affected by electromagnetic waves from the outside, and at the same time, radiate electromagnetic waves to the outside, and are sometimes serious. It also causes a serious malfunction. For this reason, a material having high conductivity, that is, a metal, or a lightweight material is used as a material for the shielding casing (housing) so as to block the influence of electromagnetic waves from the outside and prevent the electromagnetic waves from leaking to the outside. For this purpose, various resins mixed with metal fillers such as metal fibers and metal powders are used.
（発明が解決しようとする問題点） 各種樹脂にフィラーとして金属繊維を混入する場合、
導電性を向上させるためには、その絶対量を増大する
か、またはアスペクト比（繊維の直径と長さの比）を大
きくして導電性を高める。しかし前者は筐体の重量が増
大する欠点に連なり、後者では繊維の長さに限度があ
る。(Problems to be solved by the invention) When mixing metal fibers as fillers in various resins,
In order to improve the conductivity, the absolute amount is increased or the aspect ratio (the ratio of the diameter to the length of the fiber) is increased to increase the conductivity. However, the former leads to a drawback that the weight of the casing increases, and the latter has a limit on the length of the fiber.
（課題を解決するための手段） アスペクト比を大きくし、導電性を向上させる為に、
導電性繊維を含む繊維をニードリングすることにより、
繊維間の三次元的絡み合いを向上させ、それを芯材と
し、樹脂加工を施した電磁波シールド材は導電性を向上
させる。(Means for solving the problem) In order to increase the aspect ratio and improve the conductivity,
By needling fibers containing conductive fibers,
The three-dimensional entanglement between the fibers is improved, and the electromagnetic wave shielding material which has been used as a core material and subjected to resin processing improves the conductivity.
ポリアミド、アラミド、ポリエステル、アクリル等の
合成繊維の中に無電解メッキしたアクリル繊維、鉄繊
維、銅繊維、カーボン繊維を１種、または２種以上を加
えてカーディングしてなるウエブを、必要に応じて複数
枚重ね、これをニードリングして、繊維を三次元的に絡
み合わせたバットよりなる繊維集合体を作る。次いでこ
れに、フェノール樹脂、不飽和ポリエステル樹脂、メラ
ミン樹脂、エポキシ樹脂、ポリイミド樹脂、アクリロニ
トリル・ブタジエン・スチレン樹脂、ポリスチレン樹
脂、塩化ビニール樹脂等の合成樹脂を散布或は含浸させ
た上、芯材としての繊維集合体を合成繊維で覆ってなる
導電性繊維が三次元的に絡合していることを特徴とする
電磁波シールド材。A web made by adding one or more kinds of electrolessly-plated acrylic fiber, iron fiber, copper fiber, and carbon fiber to a synthetic fiber such as polyamide, aramid, polyester, and acrylic is required. A plurality of sheets are stacked according to need and are needled to produce a fiber aggregate consisting of a bat in which fibers are intertwined three-dimensionally. Next, phenol resin, unsaturated polyester resin, melamine resin, epoxy resin, polyimide resin, acrylonitrile-butadiene-styrene resin, polystyrene resin, or a synthetic resin such as vinyl chloride resin is sprayed or impregnated, and then used as a core material. An electromagnetic wave shielding material characterized in that conductive fibers obtained by covering a fiber assembly of the above with a synthetic fiber are three-dimensionally entangled.
本発明を実施するについて、具体的に説明する。 An embodiment of the present invention will be specifically described.
繊維集合体（バット）を構成する繊維は、ポリアミ
ド、ポリエステル、ポリアクリル、アラミド繊維を使用
した。この合成繊維の中に導電性のある繊維（合成繊維
をメッキしたもの、或は金属繊維、カーボン繊維）を10
％〜100％未満加えたバットを作った。As a fiber constituting the fiber assembly (bat), polyamide, polyester, polyacryl, or aramid fiber was used. Conductive fibers (plated synthetic fibers, metal fibers, or carbon fibers) are added to the synthetic fibers.
Vats were made with additions of less than 100% to 100%.
なお、目付は平方米当たり50g〜500gとした。 The basis weight was 50 g to 500 g per square rice.
上記繊維集合体に合成樹脂を含浸させる場合、一例と
して用いたフェノール樹脂は群栄化学工業株式会社製レ
ヂトップ（商標名）PG（Ａ）2470、4704、4801、4504、
2165である。繊維複合材料の中の繊維集合体（バット）
とフェノール樹脂の比は繊維１に対し樹脂３ないし８と
した。When impregnating the above-mentioned fiber aggregate with a synthetic resin, the phenol resin used as an example is resin top (trade name) PG (A) 2470, 4704, 4801, 4504, manufactured by Gunei Chemical Industry Co., Ltd.
2165. Fiber aggregate (bat) in fiber composite material
The ratio of phenol resin to resin was 3 to 8 for 1 fiber.
上記フェノール樹脂を含浸させた繊維集合体をホット
プレス機により150℃で５分間圧縮成型して板状体とし
た。その大きさは幅1m×2m、厚さ1.0mm〜50mmであっ
た。The fiber assembly impregnated with the phenolic resin was compression-molded at 150 ° C. for 5 minutes using a hot press machine to form a plate. Its size was 1m x 2m in width and 1.0mm to 50mm in thickness.
本発明電磁波シールド材を、単にプラスチックの中に
導電性物質を入れたシールド材料に比較すると、シール
ド効果を表す電磁波吸収損失は数倍に達した。更に後者
は寸法安定性においても50℃〜100℃の高温試験におい
て１％〜３％程度の伸びがあったが、本発明品は１％以
下であった。また後者は前記高温試験において100時間
以上経過すると導電性材料と強化プラスチック間の剥離
のためシールドの強度が大幅に低下したのに対し前者は
全く低下が見られなかった。When the electromagnetic wave shielding material of the present invention is simply compared with a shielding material in which a conductive substance is contained in plastic, the electromagnetic wave absorption loss indicating the shielding effect has reached several times. In the latter, the dimensional stability also increased by about 1% to 3% in a high temperature test at 50 ° C. to 100 ° C., but the product of the present invention was 1% or less. In the latter, the strength of the shield was greatly reduced due to the peeling between the conductive material and the reinforced plastic after 100 hours or more in the high-temperature test, whereas the former was not reduced at all.
（発明の効果） 本発明電磁波シールド材は常温から約100℃の範囲内
において特に電磁波シールド効果に優れており、各種電
子機器の他、自動車、航空機のシールド、電波暗室内装
材に使用することができる。(Effect of the Invention) The electromagnetic wave shielding material of the present invention is particularly excellent in the electromagnetic wave shielding effect in a range from room temperature to about 100 ° C, and can be used for various electronic devices, automobiles, aircraft shields, and interior materials for anechoic chambers. it can.
Claims (2)
をカーディングしてウエブとなし、これをニードリング
し、導電性繊維のアスペクト比を大きくせしめるよう
に、導電性繊維を三次元的に物理的に絡合させ、見掛け
の繊維長を長くして、繊維集合体（バット）を作り、こ
れを芯材とし、この芯材の繊維間に合成樹脂を散布、或
は含浸させ、芯材としての繊維集合体を合成樹脂で覆っ
てなる導電性繊維が三次元的に絡合していることを特徴
とする電磁波シールド材。1. A method of forming a web by carding a fiber comprising a mixture of a conductive fiber and a synthetic fiber, forming a web, and needling the fiber so as to increase the aspect ratio of the conductive fiber. Physically entangled physically, lengthening the apparent fiber length, making a fiber aggregate (bat), using this as the core material, and spraying or impregnating the synthetic resin between the fibers of this core material, An electromagnetic wave shielding material characterized in that conductive fibers formed by covering a fiber assembly as a core material with a synthetic resin are three-dimensionally entangled.
樹脂、不飽和ポリエステル樹脂、メラミン樹脂、エポキ
シ樹脂、ポリイミド樹脂、アクリロニトリル・ブタジエ
ン・スチレン樹脂、（ABS樹脂）、ポリスチレン樹脂、
塩化ビニール樹脂のいずれかよりなる特許請求の範囲第
１項記載の電磁波シールド材。2. Synthetic resins for electromagnetic wave shielding materials include phenolic resins, unsaturated polyester resins, melamine resins, epoxy resins, polyimide resins, acrylonitrile-butadiene-styrene resins, (ABS resins), polystyrene resins,
2. The electromagnetic wave shielding material according to claim 1, which is made of any one of vinyl chloride resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1273385A JP2811480B2 (en) | 1989-10-20 | 1989-10-20 | Electromagnetic wave shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1273385A JP2811480B2 (en) | 1989-10-20 | 1989-10-20 | Electromagnetic wave shielding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03135099A JPH03135099A (en) | 1991-06-10 |
| JP2811480B2 true JP2811480B2 (en) | 1998-10-15 |
Family
ID=17527160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1273385A Expired - Lifetime JP2811480B2 (en) | 1989-10-20 | 1989-10-20 | Electromagnetic wave shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2811480B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5873199A (en) * | 1981-10-26 | 1983-05-02 | 太平洋工業株式会社 | Radio wave shielding housing |
| JPS6022399A (en) * | 1983-07-18 | 1985-02-04 | 旭フアイバ−グラス株式会社 | Electromagnetic wave shielding material |
| JPS60119532U (en) * | 1984-01-23 | 1985-08-13 | セ−レン株式会社 | Electromagnetic shielding material |
-
1989
- 1989-10-20 JP JP1273385A patent/JP2811480B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03135099A (en) | 1991-06-10 |
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