JPS6268731A - Electromagnetic wave shielding material - Google Patents
Electromagnetic wave shielding materialInfo
- Publication number
- JPS6268731A JPS6268731A JP60208358A JP20835885A JPS6268731A JP S6268731 A JPS6268731 A JP S6268731A JP 60208358 A JP60208358 A JP 60208358A JP 20835885 A JP20835885 A JP 20835885A JP S6268731 A JPS6268731 A JP S6268731A
- Authority
- JP
- Japan
- Prior art keywords
- shielding material
- electromagnetic shielding
- electroconductive
- conductive
- sheet
- 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
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、繊ｍ質からなるシートに導電性を持たせた電
磁波シールド材の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing an electromagnetic shielding material in which a sheet made of fiber is imparted with electrical conductivity.
（従来の技術〕
各種の電子機器で、機器内の部品から発生する電磁波が
他の部品に悪影響を及ぼすことを防止するため、および
外部からの電磁波が機器内の電子部品に悪影響を及ぼす
ことを防■にするため、電子部品を電磁波シールド材で
覆う必要がある。か−る目的で使用される電磁波シール
ド材には、例えば第３図に示すような繊維シート１の上
に導電性塗料２を塗布した構造のものが知られている。(Prior art) In various electronic devices, it is necessary to prevent electromagnetic waves generated from internal parts of the device from having an adverse effect on other components, and to prevent electromagnetic waves from outside from having an adverse effect on the electronic components within the device. ■ In order to prevent electronic components, it is necessary to cover them with an electromagnetic shielding material.The electromagnetic shielding material used for this purpose includes, for example, a conductive paint 2 on a fiber sheet 1 as shown in FIG. Structures coated with are known.
この様な断面の電磁波シールド材を所望の形状に成形し
、シールドしようとする電子部品を覆いアースを取る。An electromagnetic wave shielding material having such a cross section is formed into a desired shape, and the electronic component to be shielded is covered and grounded.
このとき、第３図に示す従来の電磁波シールド材のよう
に、片面しか導電性が無いとアースが取りにくい。また
両面に導電性が有っても、シールド材の断面全体に導電
性がないと断面の端部に導体を突き当て一アースをとろ
うとしたとき絶縁されやすく、完全なアースが取りにく
いという欠点が有った。そのため、繊維シートを基材と
する電磁波シールド材においても、金属を基材とする電
磁波シールド材と同様に電磁波シールド材全体に渡って
導電性を有することが望ましい。At this time, if only one side is conductive like the conventional electromagnetic shielding material shown in FIG. 3, it is difficult to ground the material. In addition, even if both sides are conductive, if the entire cross section of the shielding material is not conductive, when you try to connect a conductor to the end of the cross section to establish a single ground, it is likely to be insulated, making it difficult to establish a complete ground. There was. Therefore, it is desirable that the entire electromagnetic shielding material has electrical conductivity in the electromagnetic shielding material that uses a fiber sheet as the base material, as well as the electromagnetic shielding material that uses metal as the base material.
ところが不織布などの繊＃Ｉ質からなるシート全体に導
電性塗料を均一に含浸させることが非常に困難であり、
望まれるような電磁波シールド材は存在しない。導電性
塗料は、例えばアクリル樹脂やウレタン樹脂（バインダ
成分）をトルエンや酢酸エチルなどの有機溶剤に溶解し
たベースの塗料に、例えば銅、銀、ニッケル、カーボン
などの導電性粉末を混合してある。このような組成の導
電性塗料は、繊維シートに塗布してもバインダ成分だけ
がシート内部に浸透してゆき、銅などの導電性粉末成分
は表面に残存してしまう。そのため、電磁波シールド材
全体に渡って導電性を有するようにはならず、表面だけ
が導電性を有することになる。However, it is extremely difficult to uniformly impregnate the entire sheet made of #I fibers such as nonwoven fabric with conductive paint.
There is no electromagnetic shielding material as desired. Conductive paints are made by mixing conductive powders such as copper, silver, nickel, and carbon into a base paint made by dissolving acrylic resin or urethane resin (binder component) in an organic solvent such as toluene or ethyl acetate. . Even when a conductive paint having such a composition is applied to a fiber sheet, only the binder component permeates into the interior of the sheet, and conductive powder components such as copper remain on the surface. Therefore, the entire electromagnetic shielding material does not have conductivity, but only the surface has conductivity.
本発明は、」二記のような理由により従来存在しなかっ
た、繊維質からなるシート全体に渡って導電性を有する
電磁波シールド材の製造方法を提供することを目的とす
るものである。It is an object of the present invention to provide a method for producing an electromagnetic shielding material having conductivity throughout the entire sheet made of fibers, which has not existed in the past due to the following reasons.
Ｉ−記の問題点を解決するための本発明を適用する電磁
波シールド材の製造方法は、第１図に示すように、以下
の手順による。（ａ）先ず繊維質からなるシート１に架
橋硬化型樹脂３を含浸する。A method of manufacturing an electromagnetic shielding material to which the present invention is applied in order to solve the problem described in item I--, as shown in FIG. 1, is based on the following procedure. (a) First, a fibrous sheet 1 is impregnated with a crosslinked curable resin 3.
（ｂ）次にそのシートｌに導１に＋１塗料２を塗布する
。（Ｃ）このようにして樹脂を含浸し、導電性塗ネ１を
塗布したシート１の表面を加圧しながら成形する。(b) Next, apply +1 paint 2 to lead 1 on the sheet 1. (C) The surface of the sheet 1 impregnated with resin and coated with the conductive paint 1 is molded while pressurizing it.
架橋硬化型樹脂３が含浸され、導電性塗料２が塗布され
ているシート１０表面が加圧Ｘれると、導電性塗ネ１の
バインダ成分と共に導電性粉末成分も繊維基材内部に浸
透してゆきながら、成形がされる。When the surface of the sheet 10 impregnated with the cross-linked curable resin 3 and coated with the conductive paint 2 is pressed, the conductive powder component as well as the binder component of the conductive paint 1 permeates inside the fiber base material. As it goes, it is shaped.
以下、本発明を適用する電磁波シールド材の製造方法の
実施例を第１図により詳細に説明する。Hereinafter, an embodiment of a method for manufacturing an electromagnetic shielding material to which the present invention is applied will be described in detail with reference to FIG.
先ず、ポリエステル繊維を原ネ４にして常法により得た
乾式不織１１ｉｌを、（ａ）に示すように、未硬化樹脂
液３に浸漬する。樹脂液３が含浸している不織布１の表
面に、（ｂ）に示すようにリバースロールコートで導電
性塗料２を塗布する。次に、（Ｃ）に示すように、この
不織布１を金型５ａと５ｂにより加圧成形する。すると
（ｄ）に示すような所望の形の電磁波シールド材の成形
品１０を得ることができる。なお７はシールドすべき電
子部品が位置する空間である。また架橋硬化型樹脂３が
加熱硬化性の場合は、金型５ａと５ｂによる加圧成形は
加熱雰囲気中で行う。First, a dry non-woven material 11il obtained by a conventional method using polyester fibers as a raw material 4 is immersed in an uncured resin liquid 3 as shown in (a). The conductive paint 2 is applied to the surface of the nonwoven fabric 1 impregnated with the resin liquid 3 by reverse roll coating as shown in (b). Next, as shown in (C), this nonwoven fabric 1 is pressure-molded using molds 5a and 5b. Then, a molded product 10 of the electromagnetic shielding material having a desired shape as shown in (d) can be obtained. Note that 7 is a space in which electronic components to be shielded are located. Further, when the crosslinked curable resin 3 is heat curable, pressure molding using the molds 5a and 5b is performed in a heated atmosphere.
−１；記の製造工程で、第２図に示すように、不織布１
の表面に塗布されている導電性塗料２（イ）が加圧によ
り不織布ｌの内部に浸透してゆきながら成形がされる（
口）。予め不織布１には樹脂液３が含浸してあり、導電
性塗料のバインダ成分と共に導電性粉末成分も充分に浸
透してゆき、電磁波シールド材全体が導電性になる。そ
してシールド性能は他の電磁波シールド材に比べて損色
のないものである。なお不織布１に予め樹脂液が含浸し
てないと、導電性塗料のバインダ成分だけが浸透してゆ
き、導電性粉末成分は表面に残留してしまう。そのため
電磁波シールド材の表面だけが導電性になってしまう。-1; In the manufacturing process described above, as shown in FIG.
The conductive paint 2 (a) applied to the surface of the non-woven fabric 1 penetrates into the inside of the non-woven fabric 1 under pressure, and the molding is carried out (
mouth). The nonwoven fabric 1 is impregnated with a resin liquid 3 in advance, and the conductive powder component as well as the binder component of the conductive paint permeates sufficiently, making the entire electromagnetic shielding material conductive. And its shielding performance is comparable to other electromagnetic shielding materials. Note that if the nonwoven fabric 1 is not impregnated with the resin liquid in advance, only the binder component of the conductive paint will penetrate, and the conductive powder component will remain on the surface. Therefore, only the surface of the electromagnetic shielding material becomes conductive.
以下に本発明を適用した方法で製造した電磁波シールド
材（本発明品）と従来の電磁波シールド材を示し性能評
価をする。Below, an electromagnetic shielding material manufactured by the method to which the present invention is applied (product of the present invention) and a conventional electromagnetic shielding material will be shown and their performance will be evaluated.
本発明品 ポリエステル繊維の目付縫が７０ｇ／ｍ２の
不織布を基材である繊維シートとしている。第１図（ａ
）で含浸させる樹脂３はフェノール樹脂である。また第
１図（ｂ）で塗布する導電性塗料２はアクリル樹脂をバ
インダ成分にし、銅粉末を導電性成分としてアセトンに
溶解したもので、乾燥後の厚さを５０ｐＬｍにする。第
２図（ロ）に示すように、電磁波シールド材は全体に渡
って均質なものになっている。Product of the present invention The base material is a fiber sheet made of a nonwoven fabric of polyester fibers with a stitch weight of 70 g/m2. Figure 1 (a
) is a phenolic resin. The conductive paint 2 applied in FIG. 1(b) is made by dissolving acrylic resin as a binder component and copper powder as a conductive component in acetone, and has a thickness of 50 pLm after drying. As shown in FIG. 2(b), the electromagnetic shielding material is uniform throughout.
従来品 ポリエステル繊維［１月品が１００ｇ／ｍ２の
不織布を基材であるｍ＃シートとしている。第１図（ａ
）の工程は採らず、樹脂の含浸していない繊維シートｌ
に導電性塗料２を塗布する。導電性塗料は、例１と同じ
くアクリル樹脂をバインダ成分にし、銅粉末を導電性成
分とするもので、乾燥後の厚さを５０＃Ｌｍにする。第
３図に示すように、電磁波シールド材は不織布ｌの片面
に導電性塗料２が塗布されている。Conventional product Polyester fiber [January product uses 100 g/m2 nonwoven fabric as the base material m# sheet. Figure 1 (a
) process is not adopted and the fiber sheet is not impregnated with resin.
Apply conductive paint 2 to the surface. The conductive paint used acrylic resin as a binder component and copper powder as a conductive component, as in Example 1, and had a thickness of 50 #Lm after drying. As shown in FIG. 3, the electromagnetic shielding material is a nonwoven fabric 1 with a conductive paint 2 applied to one side thereof.
本発明品・従来品のシールド性能は下表の通りである。The shielding performance of the product of the present invention and the conventional product is shown in the table below.
高周波電界（周波数単位ＭＨｚ）の減衰特性（単位ｄＢ
）で表している。Attenuation characteristics of high frequency electric field (frequency unit: MHz) (unit: dB)
).
表
」二表の通り本発明品のシールド性能は、従来品のシー
ルド性能より優れている。また本発明品の電磁波シール
ド材は、導電性塗料を塗布した面の裏側、あるいは断面
の中間で導通試験をしたところ、どこでも充分な導通が
取れていた。このように全体に渡って電気的に均質であ
るため、完全なアースが取りやすく、シールド性能が向
」ニしているもと考えられる。As shown in Table 2, the shielding performance of the product of the present invention is superior to that of the conventional product. Further, when the electromagnetic shielding material of the present invention was tested for continuity on the back side of the surface coated with conductive paint or in the middle of the cross section, sufficient continuity was obtained everywhere. This electrical homogeneity throughout makes it easy to establish a complete ground, which is thought to improve shielding performance.
なお上記実施例で電磁波シールド材の基材になる繊維シ
ートは乾式不織布を用いたが、湿式不織布１紙、フェル
トまたは織布が使用できる。ｍ維材質はポリエステル繊
維以外に、ポリプロピレン、アクリル系、ナイロン、ポ
リエチレンなどの凡ゆる合成繊維、羊毛、絹、麻、木綿
などの凡ゆる天然繊維が使用できる。またアラミド繊維
、ガラス繊維なども使用できる。繊維シートに含浸させ
る架橋硬化型樹脂としては、フェノール樹脂以外にエポ
キシ樹脂、不飽和ポリエステル樹脂などが使用できる。In the above embodiments, a dry nonwoven fabric was used as the fiber sheet serving as the base material of the electromagnetic shielding material, but a wet nonwoven fabric such as paper, felt, or woven fabric can be used. As the fiber material, in addition to polyester fibers, all synthetic fibers such as polypropylene, acrylic, nylon, and polyethylene, and all natural fibers such as wool, silk, hemp, and cotton can be used. Aramid fibers, glass fibers, etc. can also be used. As the crosslinked curable resin to be impregnated into the fiber sheet, epoxy resin, unsaturated polyester resin, etc. can be used in addition to phenol resin.
導電性塗ネ１としては、アクリル樹脂をバインダ成分に
し銅粉末を導電性成分とするもの以外に、例えばウレタ
ン樹脂をトルエンや酢酸エチルなどの有機溶剤に溶解し
たベースの塗料に、例えば銀、ニッケル、カーボンなど
の導電性粉末を混合した塗料が使用できる。The conductive paint 1 may be made of acrylic resin as a binder component and copper powder as a conductive component, or as a base paint made by dissolving urethane resin in an organic solvent such as toluene or ethyl acetate, for example, using silver, nickel, etc. , paint mixed with conductive powder such as carbon can be used.
また導電性塗料を繊維シートに塗布するには、前記のリ
バースロールコート以外に、例えばスプレィ、刷毛塗り
、ドクターブレードによる掻き落しなどにより均一に塗
布することができる。Furthermore, in order to apply the conductive paint to the fiber sheet, in addition to the above-mentioned reverse roll coating, the conductive paint can be applied uniformly by, for example, spraying, brushing, scraping with a doctor blade, etc.
以上説明したように、本発明を適用した方法で電磁波シ
ールド材を製造すると、繊維大村内部に導電性塗料が均
一に浸透してゆきながら成形がされる。As explained above, when an electromagnetic shielding material is manufactured by the method to which the present invention is applied, the conductive paint is uniformly permeated into the inside of the fiber laminate while being molded.
したがって製造された電磁波シールド材は、シート全体
に渡って導電性を有するので、シールド性能が従来品に
比べて優れている。また本発明の方法で製造した電磁波
シールド材のシールド性能は、従来品のシールド性能よ
り優れている。実装に際して任意の個所〒導通が得られ
るので１便利であり、またアースを取ったりする際に確
実なものになるという利点もある。Therefore, the produced electromagnetic shielding material has conductivity throughout the sheet, and therefore has superior shielding performance compared to conventional products. Further, the shielding performance of the electromagnetic shielding material manufactured by the method of the present invention is superior to that of conventional products. It is convenient because continuity can be obtained at any location during mounting, and it also has the advantage of being reliable when grounding.
第１図は本発明を適用する電磁波シールド材の製造方法
の実施例を説明する図、第２図はその要部拡大断面図、
第３図は従来の電磁波シールド材の断面図である。
１、、、、、＠維シート ２．、、、 導電性塗料３
、、、、、架橋硬化型樹脂
５ａ・５ｂ ・・・・金型
６、、、、、ポリニスエステルフィルム７・・・・・空
間FIG. 1 is a diagram illustrating an embodiment of the method for manufacturing an electromagnetic shielding material to which the present invention is applied, and FIG. 2 is an enlarged sectional view of the main part thereof.
FIG. 3 is a cross-sectional view of a conventional electromagnetic shielding material. 1,,,,@fiber sheet 2. ,,, Conductive paint 3
,,,,Crosslinked curable resin 5a, 5b...Mold 6,,,,Polyester film 7...Space
Claims (1)
前記により樹脂を含浸したシートに導電性塗料を塗布し
、前記により樹脂を含浸し導電性塗料を塗布したシート
の表面を加圧して塗布してある導電性塗料をシート内部
に浸透させながら成形することを特徴とする電磁波シー
ルド材の製造方法。1. Impregnating a fibrous sheet with cross-linked curing resin,
A conductive paint is applied to the resin-impregnated sheet as described above, and the surface of the sheet impregnated with the resin and coated with the conductive paint is pressurized to allow the applied conductive paint to penetrate into the inside of the sheet and molded. A method for producing an electromagnetic shielding material characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60208358A JPS6268731A (en) | 1985-09-20 | 1985-09-20 | Electromagnetic wave shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60208358A JPS6268731A (en) | 1985-09-20 | 1985-09-20 | Electromagnetic wave shielding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6268731A true JPS6268731A (en) | 1987-03-28 |
| JPH0528164B2 JPH0528164B2 (en) | 1993-04-23 |
Family
ID=16554967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60208358A Granted JPS6268731A (en) | 1985-09-20 | 1985-09-20 | Electromagnetic wave shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6268731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007258623A (en) * | 2006-03-27 | 2007-10-04 | Tdk Corp | Radio wave absorbing material, radio wave absorption laminated wood, radio wave absorber, and manufacturing method thereof |
-
1985
- 1985-09-20 JP JP60208358A patent/JPS6268731A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007258623A (en) * | 2006-03-27 | 2007-10-04 | Tdk Corp | Radio wave absorbing material, radio wave absorption laminated wood, radio wave absorber, and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528164B2 (en) | 1993-04-23 |
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