JPS6359558B2 - - Google Patents
Info
- Publication number
- JPS6359558B2 JPS6359558B2 JP57158219A JP15821982A JPS6359558B2 JP S6359558 B2 JPS6359558 B2 JP S6359558B2 JP 57158219 A JP57158219 A JP 57158219A JP 15821982 A JP15821982 A JP 15821982A JP S6359558 B2 JPS6359558 B2 JP S6359558B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fibers
- electromagnetic shielding
- composite ferrite
- 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.)
- Expired
Links
- 239000000835 fiber Substances 0.000 claims description 32
- 229910000859 α-Fe Inorganic materials 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Inorganic Fibers (AREA)
- Multicomponent Fibers (AREA)
- Woven Fabrics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】
本発明は、電子機器のプラスチツクハウジング
のシールドや電子機器相互間のノイズ防止用シー
ルドを行うのに適した電磁シールド材に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic shielding material suitable for shielding plastic housings of electronic devices and shielding noise prevention between electronic devices.
従来、電磁シールド材として導電体が一般に使
用され、導電体としては、金属板（鉄、パーマロ
イ、銅、アルミ等）がシールド効果の上で優れて
いるが高価であり重いという欠点を有している。
また、他の方法としてプラスチツクに金属薄膜を
メツキ、蒸着等の手段で施したり、プラスチツク
に導電体粉（カーボン粉末、金属粉末等）や導電
性繊維（カーボン長繊維ないし短繊維、金属長繊
維ないし短繊維）を混合、混練した導電性プラス
チツクを用いたりしたものがあるが、電磁シール
ド特性が悪くなる欠点や、かえつて高価になる欠
点がある。また、そもそも導電体を用いること
は、単純に電界反射を利用している部分がほとん
どであり磁界の問題（磁界をシールドする効果が
弱い）および反射波発生による副作用等の欠点が
ある。 Conventionally, conductors have generally been used as electromagnetic shielding materials, and metal plates (iron, permalloy, copper, aluminum, etc.) have excellent shielding effects, but have the drawbacks of being expensive and heavy. There is.
Other methods include applying a metal thin film to plastic by plating, vapor deposition, etc., or applying conductive powder (carbon powder, metal powder, etc.) or conductive fiber (carbon long fiber or short fiber, metal long fiber or metal fiber) to plastic. There are some methods that use conductive plastics mixed and kneaded with short fibers, but these have the drawbacks of poor electromagnetic shielding properties and higher costs. Furthermore, in most cases, the use of conductors simply utilizes electric field reflection, which has drawbacks such as magnetic field problems (weak magnetic field shielding effect) and side effects due to the generation of reflected waves.
本発明は、上記の点に鑑み、電波を吸収する作
用を持つ複合フエライト繊維を導電性繊維と組合
わせることにより、電磁シールド効果に優れ、柔
軟性に富み、軽量で強度の大きな電磁シールド材
を提供しようとするものである。 In view of the above points, the present invention combines composite ferrite fibers that absorb radio waves with conductive fibers to create an electromagnetic shielding material that has excellent electromagnetic shielding effects, is highly flexible, lightweight, and has high strength. This is what we are trying to provide.
以下、本発明に係る電磁シールド材の実施例を
図に従つて説明する。 Examples of the electromagnetic shielding material according to the present invention will be described below with reference to the drawings.
第１図の如く、導電性繊維１の囲りに複合フエ
ライト繊維２を巻きつけて混紡した繊維３を作成
する。ここで、導電性繊維１は例えばカーボン繊
維、金属コーテイング繊維、炭化硅素繊維、アク
リル系繊維に銅イオンを拡散させ分子間に銅を化
学的に結合させたサニダロイ繊維（例えば、商品
名「サンダーロンSSN」日本蚕毛染色株式会
社）、金属繊維等で構成される。また、複合フエ
ライト繊維２は、第２図の如く、平均粒子径0.3
〜20μｍのフエライト粉末を接着剤等の高分子材
料に体積混合比率0.2〜0.8の範囲で混合した液状
複合フエライト材を厚み50μｍ以下の例えばポリ
エステル等の高分子材料フイルム４に100μｍ以
下に塗布して複合フエライト層５を形成し乾燥さ
せた複合フエライトシート６を、第３図のように
幅100μｍ以下にスリツト状に切断することによ
り得られる。 As shown in FIG. 1, composite ferrite fibers 2 are wound around conductive fibers 1 to create blended fibers 3. Here, the conductive fiber 1 is, for example, a carbon fiber, a metal-coated fiber, a silicon carbide fiber, or an acrylic fiber made by diffusing copper ions and chemically bonding copper between the molecules. SSN (Japan Silk Hair Dyeing Co., Ltd.), metal fibers, etc. Further, as shown in Fig. 2, the composite ferrite fiber 2 has an average particle diameter of 0.3.
A liquid composite ferrite material prepared by mixing ~20 μm ferrite powder with a polymeric material such as an adhesive at a volume mixing ratio of 0.2 to 0.8 is applied to a film 4 of a polymeric material such as polyester with a thickness of 50 μm or less to a thickness of 100 μm or less. It is obtained by cutting a composite ferrite sheet 6 on which a composite ferrite layer 5 has been formed and dried into slits having a width of 100 μm or less as shown in FIG.
第４図に実施例として示す電磁シールド材１０
は、第１図の混紡繊維３を布に織ることにより得
られるものである。この電磁シールド材１０は、
導電性繊維１で充分な電波の反射を行い、電磁シ
ールド効果を上げるとともに、導電性繊維１に電
流ｉが流れるときに発生する磁場Ｈに対し、複合
フエライト繊維２の磁気損失により有効に電波を
吸収し、電磁シールド効果をさらに高めることが
でき、単なる導電性繊維のみの場合よりも10dB
位減衰量を改善することができる。 Electromagnetic shielding material 10 shown as an example in FIG.
is obtained by weaving the blended fiber 3 shown in FIG. 1 into cloth. This electromagnetic shielding material 10 is
The conductive fibers 1 reflect sufficient radio waves to improve the electromagnetic shielding effect, and the composite ferrite fibers 2 effectively reflect radio waves due to the magnetic loss in the magnetic field H generated when a current i flows through the conductive fibers 1. It can further enhance the electromagnetic shielding effect by 10dB compared to just conductive fibers.
The amount of attenuation can be improved.
以上説明したように、本発明によれば、電波を
吸収する作用を持つ複合フエライト繊維を導電性
繊維と組合わせることにより、電磁シールド効果
に優れ、柔軟性に富み、軽量で強度の大きな電磁
シールド材を得ることができる。 As explained above, according to the present invention, by combining composite ferrite fibers that absorb radio waves with conductive fibers, an electromagnetic shield with excellent electromagnetic shielding effect, high flexibility, light weight, and high strength can be achieved. material can be obtained.
第１図は本発明で用いる導電性繊維と複合フエ
ライト繊維とを混紡した繊維を示す拡大図、第２
図及び第３図は複合フエライト繊維を作る工程を
示す斜視図、第４図は本発明に係る電磁シールド
材の実施例を示す斜視図である。
１…導電性繊維、２…複合フエライト繊維、３
…混紡した繊維、４…高分子材料フイルム、５…
複合フエライト層、１０…電磁シールド材。
Figure 1 is an enlarged view showing a fiber obtained by blending conductive fibers and composite ferrite fibers used in the present invention;
3 and 3 are perspective views showing the process of making composite ferrite fibers, and FIG. 4 is a perspective view showing an example of the electromagnetic shielding material according to the present invention. 1... Conductive fiber, 2... Composite ferrite fiber, 3
...Blended fiber, 4...Polymer material film, 5...
Composite ferrite layer, 10...electromagnetic shielding material.
Claims (1)
きつけて混紡した繊維を織つて布としたことを特
徴とする電磁シールド材。1. An electromagnetic shielding material characterized by a cloth made by weaving a blend of composite ferrite fibers wrapped around conductive fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57158219A JPS5947797A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic shield material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57158219A JPS5947797A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic shield material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5947797A JPS5947797A (en) | 1984-03-17 |
| JPS6359558B2 true JPS6359558B2 (en) | 1988-11-21 |
Family
ID=15666880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57158219A Granted JPS5947797A (en) | 1982-09-13 | 1982-09-13 | Electromagnetic shield material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947797A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62287699A (en) * | 1986-06-06 | 1987-12-14 | 工業技術院長 | Method of electromagnetic shielding joint of conductive material |
-
1982
- 1982-09-13 JP JP57158219A patent/JPS5947797A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5947797A (en) | 1984-03-17 |
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