JPH01184900A - Electromagnetic shield filter and electronic equipment provided therewith - Google Patents
Electromagnetic shield filter and electronic equipment provided therewithInfo
- Publication number
- JPH01184900A JPH01184900A JP655988A JP655988A JPH01184900A JP H01184900 A JPH01184900 A JP H01184900A JP 655988 A JP655988 A JP 655988A JP 655988 A JP655988 A JP 655988A JP H01184900 A JPH01184900 A JP H01184900A
- Authority
- JP
- Japan
- Prior art keywords
- metal layer
- metal
- fiber
- fibers
- magnetic permeability
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 238000007772 electroless plating Methods 0.000 abstract description 3
- 229920000728 polyester Polymers 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 238000007740 vapor deposition Methods 0.000 abstract description 3
- 229910000925 Cd alloy Inorganic materials 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 abstract description 2
- 229920001778 nylon Polymers 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 17
- 239000004745 nonwoven fabric Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002821 Modacrylic Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- -1 bolJ7'ropylene Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、濾過作用を有する電磁波シールド材に関する
ものである。詳しくは、コンピューター及び通信機等の
電子機器の冷却用空気の吸排気口に用いる電磁波シール
ド濾材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic shielding material having a filtering effect. Specifically, the present invention relates to an electromagnetic wave shielding filter material used for cooling air intake and exhaust ports of electronic devices such as computers and communication devices.
従来、コンビ、−ター及び通信機等の電子機器の電磁波
シールドとしては、素子基−を金属製箱内に閉じ込める
ことくより行なわれている。Conventionally, electromagnetic shielding for electronic devices such as combinations, computers, and communication devices has been carried out by confining the element board in a metal box.
また、内部冷却が必要な機種については、冷却用空気の
吸排気口には、サランネッ）＄１７４ルター及びアルオ
製、鉄系命綱製の針金網等の極めて簡単な構造体のもの
が一般に採用されている。In addition, for models that require internal cooling, extremely simple structures such as wire mesh made by Sarannet $174 Luther and Aluo and iron-based lifelines are generally used for the cooling air intake and exhaust ports. ing.
しかるに、近年の如く上記電子機器の高機能化、高性能
化、高速処理化が進み、設置される電子部品数も多くな
り、かつ高精度のものが使用されている為これら電子部
品から発生する熱による、誤動作が無視出来なくなり、
内部の電子部品を冷却（主に空気による）する必要が生
じてきた。従ってこの冷却用空気の吸排口を遇して侵入
してくる電磁波による、上記電子機器の誤動作が問題と
なっている。ところで、従来採用されているサランネッ
ト等のフィルターでは、電磁波を遮断する作用はなく、
また、アルミ製及び鉄系金属の針金網等の簡単な構造体
のものでは、充分なシールド効果が得られず、更に室内
で発生した塵埃等に対するｔ過、捕集機能が低いため、
これら塵埃の機器内部への侵入。However, in recent years, as the electronic devices mentioned above have become more sophisticated, have higher performance, and faster processing speed, the number of electronic components installed has increased, and high-precision products are being used, so that the electronic components are generating more and more energy. Malfunctions due to heat can no longer be ignored,
It has become necessary to cool internal electronic components (mainly with air). Therefore, malfunction of the electronic equipment due to electromagnetic waves that enter through the cooling air intake and exhaust ports has become a problem. By the way, conventionally used filters such as Saran Net do not have the effect of blocking electromagnetic waves.
In addition, simple structures such as wire nets made of aluminum or iron-based metals do not have sufficient shielding effects, and furthermore, their ability to absorb and collect dust generated indoors is low.
Intrusion of these dust particles into the inside of the equipment.
付着により、接点部の接触不良等が発生し、機器の動作
不安定を生じる等の欠点があった。Due to the adhesion, there were drawbacks such as poor contact at the contact portions and unstable operation of the equipment.
本発明では、上記欠点を解決するため、電磁波シールド
材の基材に再生、半合成１合成、無機等の化学繊維又は
これらの混合繊維よりなる多空隙構造の不織布を採用し
、不織布のもつ濾過作用を利用し、機器の冷却用空気の
吸排気口からの塵埃の侵入を防ぐ構造としたものである
。In the present invention, in order to solve the above-mentioned drawbacks, a nonwoven fabric with a multi-void structure made of recycled, semi-synthetic, inorganic or other chemical fibers, or a mixture thereof is used as the base material of the electromagnetic shielding material, and the filtration property of the nonwoven fabric is improved. This structure utilizes this effect to prevent dust from entering through the cooling air intake and exhaust ports of the equipment.
即ち、該不織布を構成する繊維の表面上に抵抗率ρが１
．０〜＆ ＯＸ １０ Ω・伽の金属層と、更にその
表面上に比透磁率ｐｇが８０以上の金属層を設けた複合
金属層を有する繊維によ妙不織布の導電性及び透磁性を
向上せしめ、電磁波に対するシールド性を高める構造と
した事により問題点を解消したものである。更には上記
電磁波シールド濾材を支持する枠体をも、導電性、透磁
性を持たせるため、抵抗率ＰがＬＯ〜＆ＯＸ」
１０ Ω・龜の金属を母材とし、更にこの母材表面に比
透磁率−を３０以上の４１．Ｉｊ１４層を設けた構造と
したものである。That is, the resistivity ρ is 1 on the surface of the fibers constituting the nonwoven fabric.
．． The conductivity and magnetic permeability of the non-woven fabric are improved by using a fiber having a composite metal layer, which has a metal layer of 0 to &OX 10 Ω, and a metal layer with a relative magnetic permeability pg of 80 or more on the surface of the metal layer. This problem has been solved by adopting a structure that improves shielding performance against electromagnetic waves. Furthermore, in order to make the frame supporting the electromagnetic wave shielding filter medium conductive and magnetically permeable, the resistivity P is made of a metal with a resistance of LO to &OX. Magnetic permeability - 30 or more 41. It has a structure in which 14 Ij layers are provided.
本発明は第１図Ｃ）、（ロ）又は第８図に示す構成した
ことによシ、コンビ、−ター及び通信機等の電子機器の
冷却用空気の吸排気口からの電磁波の侵入、漏洩を軽減
し、電磁波による誤動作を軽減する作用を有する。更に
、濾過作用の有する多空隙の不織布構造であるため、室
内で発生した塵埃による、内部の電子部品の接触不良等
も軽減でき、動作の不安定を軽減できる作用を有する。The present invention has the configuration shown in FIG. 1 C), (B) or FIG. It has the effect of reducing leakage and malfunction due to electromagnetic waves. Furthermore, since it has a multi-void non-woven fabric structure that has a filtering effect, it can reduce poor contact of internal electronic components due to dust generated indoors, and has the effect of reducing instability in operation.
本発明の実施例を図面に基づいて説明す墨。 Embodiments of the present invention will be explained based on the drawings.
第１図ヒ）、（ロ）は本発明に用いる複合金属層を有す
る化学繊維及び不織布濾材の構成断面図である。第１図
（イ）に示す様に中心に位置する化学繊維（１）は、ポ
リエステル、ナイロン、ボｌＪ７’ロピレン、モダアク
リル、アセテート、レーヨン金属繊維、ガラス繊維等、
合成繊維、半合成繊維、再生繊維等の化学繊維より選択
される。FIGS. 1A) and 1B are cross-sectional views of a chemical fiber and nonwoven filter material having a composite metal layer used in the present invention. As shown in Figure 1 (a), the chemical fibers (1) located in the center include polyester, nylon, bolJ7'ropylene, modacrylic, acetate, rayon metal fiber, glass fiber, etc.
It is selected from chemical fibers such as synthetic fibers, semi-synthetic fibers, and recycled fibers.
該繊維ゝｆｔｌの表面に位置する第１の金属層（りは、
この抵抗率ＰがＬＯ〜＆０Ｘ１０ Ω・伽の金属で、
銀、金、銅、アルミニウム等の単一金属或いは、カドミ
ウム合金、銀入鋼等の合金類であ、す、無電解メツキ法
及び蒸着法により繊維＋１１表面上に形成させる。更に
上記第１金属層（２）表面に設けられる第２の金属層（
３）は、比透磁率μ日が３０以上の金属で、ニッケル、
鉄等の単一金属或いは、フェライト、パーツロイ等の合
金類であり、蒸着メツキ法等により設けられた複合金属
層を有する化学繊維であり、かかる化学繊維を公知のク
エプ形成手段、例えばランドクエッパー機により形成し
たランダムウェブに機械的又は化学的結合手段により繊
維間相互を固定し、電磁波シールド濾材（４）を構成す
る。A first metal layer located on the surface of the fiber
This metal has a resistivity P of LO~&0x10 Ω・伽,
A single metal such as silver, gold, copper, or aluminum or an alloy such as cadmium alloy or silver-filled steel is formed on the surface of the fiber +11 by electroless plating or vapor deposition. Furthermore, a second metal layer (
3) is a metal with a relative magnetic permeability μday of 30 or more, including nickel,
It is a chemical fiber having a composite metal layer made of a single metal such as iron or an alloy such as ferrite or part-throyed metal by a vapor deposition plating method, etc., and the chemical fiber is formed by a known Kuepper forming means, such as a Rand Kuepper. The fibers are fixed to each other in the random web formed by the machine by mechanical or chemical bonding means to form an electromagnetic shielding filter medium (4).
第８図は、本発明の一実施例のシールド効果を示すグラ
フであり、（イ）は電界成分を、（ロ）は磁界成分を示
す。ここで採用した繊維ｆｉｌはポリエステルであり、
金属層は鋼を無電解メツキ法により形成させ、金属Ｂは
二、ケルでメツキ法により形成した。ここで得られた電
磁波シールド材の効果は、第２図（イ）で示すように、
電界成分は何れの周波数に於いても６０Ｂ以上の効果が
得られ、磁界成分に於いても１０ ＭＨ２以上で効果が
認められた。また表面抵抗率は０．９Ω・―であった。FIG. 8 is a graph showing the shielding effect of an embodiment of the present invention, in which (a) shows the electric field component and (b) shows the magnetic field component. The fiber fil adopted here is polyester,
The metal layer was formed by electroless plating of steel, and the metal B was formed by plating with steel. The effect of the electromagnetic shielding material obtained here is as shown in Figure 2 (a).
An effect of 60 B or more was obtained for the electric field component at any frequency, and an effect was observed for the magnetic field component at 10 MH2 or more. Moreover, the surface resistivity was 0.9Ω·−.
更に濾過性能として、風速＆ Ｏｍ／。Furthermore, as for filtration performance, the wind speed & Om/.
時の初期圧損が表Ｏｔｍ Ｈ，Ｏで捕集効率（重量法）
７５％であった。The initial pressure drop at the time is table Otm H, O collection efficiency (gravimetric method)
It was 75%.
ｗｃｓ図は、本発明の他の実施例を示す断面図であり、
図に示すように、気流流入側から流出側に向って粗から
密へ変化する密度勾配型不織布マットを形成し、該不織
布マット構成繊維は上記と同様の複合金属処理が施され
た電磁波シールド濾材を形成する。該濾材は風速＆ Ｏ
ｍ／。The wcs diagram is a sectional view showing another embodiment of the present invention,
As shown in the figure, a density gradient type nonwoven fabric mat is formed that changes from coarse to dense from the airflow inflow side to the airflow outflow side, and the fibers constituting the nonwoven fabric mat are electromagnetic shielding filter materials that have been subjected to the same composite metal treatment as above. form. The filter medium has a wind speed &O
m/.
時の初期圧損は４５４Ｈ，Ｏで捕集効率（重量法）８３
％であった。また、シールド効果は、前述の場合と大差
ない電磁波シールド植材が得られた。The initial pressure drop is 454H,O and the collection efficiency (gravimetric method) is 83
%Met. In addition, electromagnetic shielding material with shielding effect not much different from the above-mentioned case was obtained.
本発明は上記の如く不織布濾材を構成する繊維に、導電
性及び透磁性を付与することによりコンピューター及び
通信器等の電子機器の冷却用空気の吸排気口よりの電磁
波の侵入、漏洩を軽減し、電磁波による、電子機器の誤
動作を軽減する効果を有する。更に１濾過作用を利用し
塵埃付着による、電子部品の接点不良、動作不安定を軽
減する等の優れた効果を有するものである。As described above, the present invention reduces the intrusion and leakage of electromagnetic waves from the cooling air intake and exhaust ports of electronic devices such as computers and communication devices by imparting conductivity and magnetic permeability to the fibers that constitute the nonwoven filter medium. , has the effect of reducing malfunctions of electronic equipment due to electromagnetic waves. Furthermore, by utilizing the filtration action, it has excellent effects such as reducing contact failure and unstable operation of electronic components due to dust adhesion.
第１図（イ）、 （Ｃ１１は、夫々本発明の電磁波シー
ルド濾材を構成する繊維の断面図及び電通波シールド濾
材の概略構成断面図、第２図は同電磁波シールド濾材の
シールド効果を示すグラフで。
（イ）は電界成分、（ロ）は磁界成分での測定グラフ、
ｔｍ８図は、本発明の他の実施例を示す断面図である。
ｆｌ＋・・・繊維、（２）・・・第１金属層、（３）・
・・第８金属膚川・・・電磁波シールド濾材
第２図
（イ）
Ｈ２］
（ロ）
１司屓臥 Ｌｌ’
（ロ）
＼
第３図Figures 1 (a) and (C11 are a cross-sectional view of the fibers constituting the electromagnetic wave shielding filter medium of the present invention and a schematic cross-sectional view of the electromagnetic wave shielding filter medium, respectively, and Figure 2 is a graph showing the shielding effect of the same electromagnetic wave shielding filter medium. (a) is the measurement graph for the electric field component, (b) is the measurement graph for the magnetic field component,
Figure tm8 is a sectional view showing another embodiment of the present invention. fl+...Fiber, (2)...First metal layer, (3)...
...No.8 Metal Hadakawa...Electromagnetic shielding filter material Figure 2 (A) H2] (B) 1 Ll' (B) ＼ Figure 3
Claims (3)
織布濾材を構成する各繊維表面上に、抵抗率ρが１．０
〜８．０×１０＾−＾６Ω・ｃｍの金属層と、更にこの
金属層表面に、比透磁率μｓが３０以上の金属層との複
合金属層を設けてなる電磁波シールド濾材。(1) A resistivity ρ of 1.0 is applied to the surface of each fiber constituting the nonwoven filter medium made of chemical fibers or mixed fibers thereof.
An electromagnetic shielding filter material comprising a metal layer of ~8.0×10^-^6 Ω·cm and a composite metal layer with a metal layer having a relative magnetic permeability μs of 30 or more on the surface of this metal layer.
る電子機器。(2) An electronic device equipped with the electromagnetic shielding filter material according to claim 1.
ｍの金属よりなり、該金属表面に比透磁率μｓが８０以
上の金属層を有する枠体に電磁波シールド濾材を装着し
てなる請求項１記載の電磁波シールド濾材。(3) Resistivity ρ is 1.0 to 3.0 x 10^-^6Ω・c
2. The electromagnetic wave shielding filter medium according to claim 1, wherein the electromagnetic wave shielding filter medium is attached to a frame body made of a metal with a relative magnetic permeability μs of 80 or more and having a metal layer on the surface of the metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP655988A JPH01184900A (en) | 1988-01-13 | 1988-01-13 | Electromagnetic shield filter and electronic equipment provided therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP655988A JPH01184900A (en) | 1988-01-13 | 1988-01-13 | Electromagnetic shield filter and electronic equipment provided therewith |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01184900A true JPH01184900A (en) | 1989-07-24 |
| JPH0471360B2 JPH0471360B2 (en) | 1992-11-13 |
Family
ID=11641689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP655988A Granted JPH01184900A (en) | 1988-01-13 | 1988-01-13 | Electromagnetic shield filter and electronic equipment provided therewith |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01184900A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003002600A (en) * | 2001-06-15 | 2003-01-08 | Toyota Industries Corp | Cooling structure for controller in industrial vehicle, and forklift truck of counter-balance type |
-
1988
- 1988-01-13 JP JP655988A patent/JPH01184900A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003002600A (en) * | 2001-06-15 | 2003-01-08 | Toyota Industries Corp | Cooling structure for controller in industrial vehicle, and forklift truck of counter-balance type |
| JP4706133B2 (en) * | 2001-06-15 | 2011-06-22 | 株式会社豊田自動織機 | Control device cooling structure and counterbalance forklift truck in industrial vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0471360B2 (en) | 1992-11-13 |
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