JP2003209388A - Laminate - Google Patents
LaminateInfo
- Publication number
- JP2003209388A JP2003209388A JP2002008182A JP2002008182A JP2003209388A JP 2003209388 A JP2003209388 A JP 2003209388A JP 2002008182 A JP2002008182 A JP 2002008182A JP 2002008182 A JP2002008182 A JP 2002008182A JP 2003209388 A JP2003209388 A JP 2003209388A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- laminate
- laminated
- base material
- absorber
- 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.)
- Pending
Links
Landscapes
- Laminated Bodies (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Building Environments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンピュータや携
帯電話機などの電子機器や建物の壁面などへ取り付けら
れて、特定周波数の電磁波を吸収するための積層体にか
かり、特に高周波数を有する電磁波であっても吸収でき
る積層体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated body which is attached to an electronic device such as a computer or a mobile phone or a wall surface of a building and absorbs an electromagnetic wave having a specific frequency. The present invention relates to a laminate that can be absorbed.
【０００２】[0002]
【従来の技術】従来、特定周波数の電磁波を吸収する積
層体としては、導電性を有する板状の基材と、基材の一
面へ複数積層された電磁波吸収層を有するものが知られ
ており、この電磁波吸収層の積層順を決定する手段とし
て、例えば特開２０００−３１６８６号のものが開示さ
れている。2. Description of the Related Art Conventionally, as a laminated body which absorbs electromagnetic waves of a specific frequency, one having a conductive plate-like base material and an electromagnetic wave absorbing layer laminated on one surface of the base material is known. As means for determining the stacking order of the electromagnetic wave absorbing layers, for example, Japanese Patent Laid-Open No. 2000-31686 is disclosed.
【０００３】[0003]
【発明が解決しようとする課題】この手段にあっては、
複数の電磁波吸収層を、電磁波の入射側から透過側に向
かって次第にインピーダンスが減少するように積層させ
たものであり、空間のインピーダンスと電磁波吸収材料
のインピーダンスの不整合を順次減少させて電磁波を吸
収するというものである。しかしながら、この手段にあ
っては、特に５．８ＧＨｚ以上の高い周波数を有する電
磁波が入射した際に、両者のインピーダンスが整合しな
くなって電磁波を漏洩させ、電子機器の誤動作が発生し
てしまうという課題があった。SUMMARY OF THE INVENTION With this means,
A plurality of electromagnetic wave absorption layers are laminated so that the impedance gradually decreases from the electromagnetic wave incident side to the electromagnetic wave transmission side, and the mismatch of the impedance of the space and the impedance of the electromagnetic wave absorbing material is gradually reduced to reduce the electromagnetic wave. It is to absorb. However, in this means, when an electromagnetic wave having a high frequency of 5.8 GHz or more is incident, the impedances of the both do not match and the electromagnetic wave leaks, causing a malfunction of the electronic device. was there.
【０００４】したがって、本発明の目的は、周波数の高
い電磁波であっても吸収できる積層体を提供することを
目的とする。Therefore, it is an object of the present invention to provide a laminate which can absorb electromagnetic waves of high frequency.
【０００５】[0005]
【課題を解決するための手段】本発明者は、上記に鑑み
鋭意検討を行なった結果、導電性を有する板状の基材
と、基材の一面へ積層された電磁波吸収体を有する積層
体において、電磁波吸収体が、複数の電磁波吸収層を電
磁波の入射側から透過側へ向かって電磁波吸収率／電磁
波反射率の値が次第に減少するように積層させたものと
することで、上記課題を解決できることを見出し本発明
を完成した。Means for Solving the Problems As a result of intensive studies in view of the above, the present inventor has found that a laminate having a plate-like base material having conductivity and an electromagnetic wave absorber laminated on one surface of the base material. In the electromagnetic wave absorber, a plurality of electromagnetic wave absorption layers are laminated so that the values of electromagnetic wave absorption rate / electromagnetic wave reflectance gradually decrease from the electromagnetic wave incident side to the electromagnetic wave transmission side, whereby the above problems are solved. The inventors have found that they can be solved and completed the present invention.
【０００６】[0006]
【発明の実施の形態】本発明における積層体の電磁波吸
収体は、バインダーにフィラー粒子を配合した複数の電
磁波吸収層を、電磁波の入射側から透過側へ向かって電
磁波吸収率／電磁波反射率の値の傾斜構造を形成するよ
うに順次積層させたシート状のものであり、電磁波を吸
収・減衰するためのものである。BEST MODE FOR CARRYING OUT THE INVENTION The electromagnetic wave absorber of the laminate according to the present invention comprises a plurality of electromagnetic wave absorption layers each having a binder and filler particles mixed therein, the electromagnetic wave absorption rate / electromagnetic wave reflection rate of the electromagnetic wave absorption side / transmission side being increased from the electromagnetic wave incidence side to the transmission side. It is a sheet-like member that is sequentially laminated so as to form a graded structure of values, and is for absorbing and attenuating electromagnetic waves.
【０００７】電磁波吸収体にあっては、電磁波吸収率／
電磁波反射率の値の傾斜構造を形成させることによっ
て、周波数の高い電磁波が入射した際にあっても、空間
のインピーダンスと電磁波吸収材料のインピーダンスの
不整合を順次減少させて電磁波を吸収するものである。The electromagnetic wave absorber has an electromagnetic wave absorption rate /
By forming an inclined structure of the electromagnetic wave reflectance value, even when a high frequency electromagnetic wave is incident, the mismatch of the impedance of the space and the impedance of the electromagnetic wave absorbing material is gradually reduced to absorb the electromagnetic wave. is there.
【０００８】ここで、電磁波吸収体の電磁波吸収率／電
磁波反射率の値に傾斜構造を形成させるためには、バイ
ンダーに配合するフィラー粒子の種類や配合量、電磁波
吸収体自体の厚さを調整して、異なる電磁波吸収率／電
磁波反射率の値を有する電磁波吸収層を複数準備し、目
的とする傾斜構造に合わせて順次積層すればよい。Here, in order to form an inclined structure in the value of the electromagnetic wave absorptivity / electromagnetic wave reflectivity of the electromagnetic wave absorber, the kind and amount of the filler particles to be incorporated in the binder, and the thickness of the electromagnetic wave absorber itself are adjusted. Then, a plurality of electromagnetic wave absorption layers having different values of electromagnetic wave absorptivity / electromagnetic wave reflectivity may be prepared and sequentially laminated in accordance with a desired tilted structure.
【０００９】なお、電磁波吸収率とは、電磁波吸収体が
電磁波を吸収する割合を表したものであり、吸収させよ
うとする周波数の電磁波を、導電性を有する基材の一面
へ積層させた厚さ１ｍｍの電磁波吸収体へネットワーク
アナライザーで照射した際の反射減衰量を測定した値で
ある。The electromagnetic wave absorptivity represents the ratio of electromagnetic waves absorbed by the electromagnetic wave absorber, and is a thickness obtained by laminating an electromagnetic wave having a frequency to be absorbed on one surface of a conductive base material. It is a value obtained by measuring the return loss when the electromagnetic wave absorber having a length of 1 mm is irradiated with a network analyzer.
【００１０】また、電磁波反射率とは、電磁波吸収体が
電磁波を反射する割合を表したものであり、吸収させよ
うとする周波数の電磁波を、厚さ１ｍｍのシート状に成
形した電磁波吸収体へネットワークアナライザーで照射
した際の反射減衰量を測定した値である。The electromagnetic wave reflectivity represents the ratio of the electromagnetic wave absorber that reflects the electromagnetic wave, and the electromagnetic wave having a frequency to be absorbed is formed into a sheet having a thickness of 1 mm. It is a value obtained by measuring the return loss upon irradiation with a network analyzer.
【００１１】電磁波吸収層におけるバインダーは、有機
溶剤又は水に溶解又は分散可能な合成樹脂であり、シー
ト状に成形されてフィラー粒子を安定的に保持するため
のものである。このようなバインダーとしては、例えば
クロロプレン系樹脂、天然ゴム系樹脂、ブチルアクリレ
ート−イソブチルメタクリレート系樹脂、ポリエステル
樹脂、アクリルゴム系樹脂、ポリウレタン系樹脂、これ
らの変性樹脂又はこれらの複合体などがある。The binder in the electromagnetic wave absorbing layer is a synthetic resin that can be dissolved or dispersed in an organic solvent or water, and is formed into a sheet shape for stably holding the filler particles. Examples of such a binder include a chloroprene-based resin, a natural rubber-based resin, a butyl acrylate-isobutyl methacrylate-based resin, a polyester resin, an acrylic rubber-based resin, a polyurethane-based resin, a modified resin thereof, or a composite thereof.
【００１２】電磁波吸収層におけるフィラー粒子は、磁
性体、誘電体、導電体の単体又は混合物であり、電磁波
を吸収・減衰するためのものである。このようなフィラ
ー粒子としては、鉄、ニッケル、マンガン、マグネシウ
ム、亜鉛、バリウム、チタン、アルミニウム、ストロン
チウムなどの単体、混合物あるいは共晶を含む金属酸化
物や、カルボニル鉄、チタン酸バリウム、チタン酸スト
ロンチウム、カーボン、センダストなどがある。The filler particles in the electromagnetic wave absorbing layer are a single substance or a mixture of a magnetic substance, a dielectric substance and a conductor, and are for absorbing and attenuating electromagnetic waves. Such filler particles include iron, nickel, manganese, magnesium, zinc, barium, titanium, aluminum, strontium, and other simple substances, metal oxides containing a mixture or eutectic, carbonyl iron, barium titanate, strontium titanate. , Carbon, sendust, etc.
【００１３】ここで、バインダーに対するフィラー粒子
の配合量にあっては、あまりに少ないと電磁波を吸収・
減衰できなくなり、あまりに多いと電磁波吸収層をシー
ト状に成形できなくなってしまうため、バインダー１０
０重量部に対して１００〜１０００重量部が良い。If the amount of the filler particles mixed with the binder is too small, electromagnetic waves will be absorbed.
If it is too much, it becomes impossible to form the electromagnetic wave absorbing layer into a sheet, so that the binder 10
100 to 1000 parts by weight is preferable to 0 parts by weight.
【００１４】本発明における積層体の基材は、抵抗値が
１０Ω以下の導電性を有する板状体であり、電磁波吸収
層を安定的に固定するとともに吸収する電磁波の周波数
帯域を広くするためのものである。このような基材とし
ては、従来電磁波吸収材料の裏打ち材として採用されて
いる、アルミニウム箔、銅箔、銀箔、導電性フイルム、
銀蒸着膜、ＩＴＯ蒸着膜などの金属製体を採用できる。The base material of the laminate in the present invention is a conductive plate-like material having a resistance value of 10 Ω or less, and is used to stably fix the electromagnetic wave absorbing layer and to widen the frequency band of the electromagnetic wave to be absorbed. It is a thing. As such a substrate, an aluminum foil, a copper foil, a silver foil, a conductive film, which has been conventionally used as a backing material for electromagnetic wave absorbing materials,
A metal body such as a silver vapor deposition film or an ITO vapor deposition film can be adopted.
【００１５】本発明における積層体を製造するには、バ
インダーを有機溶剤又は水に溶解又は分散させた後、フ
ィラー粒子を目的とする電磁波吸収率／電磁波反射率の
値が得られるように種類や配合量を調整して溶解又は分
散させ、シート状に成形して乾燥させて電磁波吸収層を
得る。得られた電磁波吸収層を、基材上に電磁波の入射
側から透過側へ向かって、電磁波吸収率／電磁波反射率
の値が次第に減少するように、粘着剤や接着剤を介して
複数積層させて完了する。In order to produce the laminate of the present invention, the binder is dissolved or dispersed in an organic solvent or water, and then the type and the type of the filler particles are obtained so that the desired electromagnetic wave absorptivity / electromagnetic wave reflectance can be obtained. The compounding amount is adjusted to dissolve or disperse, the mixture is molded into a sheet and dried to obtain an electromagnetic wave absorbing layer. A plurality of the obtained electromagnetic wave absorption layers are laminated on the base material with an adhesive or an adhesive so that the values of the electromagnetic wave absorption rate / electromagnetic wave reflectance gradually decrease from the electromagnetic wave incident side to the electromagnetic wave transmission side. Complete.
【００１６】本発明にあっては、導電性を有する板状の
基材と、基材の一面へ積層された電磁波吸収体を有する
積層体において、電磁波吸収体が、電磁波の入射側から
透過側へ向かって、電磁波吸収率／電磁波反射率の値を
次第に減少させたものとすることで、周波数の高い電磁
波であっても吸収できる積層体が得られた。In the present invention, in a laminate having a plate-like base material having conductivity and an electromagnetic wave absorber laminated on one surface of the base material, the electromagnetic wave absorber is from the incident side to the transmission side of the electromagnetic wave. By gradually decreasing the values of the electromagnetic wave absorptivity / electromagnetic wave reflectivity, a laminate capable of absorbing even high frequency electromagnetic waves was obtained.
【００１７】[0017]
【実施例】本発明にかかる積層体の実施例１について、
表１及び図１を参照しつつ説明する。実施例１の積層体
は、図１に示すように、厚さ１００μｍの基材１と、基
材１に積層された厚さ３００μｍの第一電磁波吸収層２
１、第一電磁波吸収層２１に積層された厚さ６００μｍ
の第二電磁波吸収層２２、第二電磁波吸収層２２に積層
された厚さ１２００μｍの第三電磁波吸収層２３からな
る電磁波吸収体２を有するものである。EXAMPLES Example 1 of the laminate according to the present invention,
This will be described with reference to Table 1 and FIG. As shown in FIG. 1, the laminate of Example 1 includes a base material 1 having a thickness of 100 μm and a first electromagnetic wave absorption layer 2 having a thickness of 300 μm laminated on the base material 1.
1. Thickness 600 μm laminated on the first electromagnetic wave absorption layer 21
The second electromagnetic wave absorbing layer 22 and the third electromagnetic wave absorbing layer 23 having a thickness of 1200 μm laminated on the second electromagnetic wave absorbing layer 22 are included in the electromagnetic wave absorber 2.
【００１８】ここで、基材１はアルミニウム箔製であ
り、第一電磁波吸収層２１はバインダーとしてのアクリ
ルゴムラテックス１００重量部に、フィラー粒子として
のマンガン−亜鉛系フェライト２００重量部とカーボン
１５０重量部を配合させ、周波数１８．０ＧＨｚにおけ
る電磁波吸収率／電磁波反射率の値を０．０５にしたも
のである。また、第二電磁波吸収層２２はバインダーと
してのアクリルゴムラテックス１００重量部に、フィラ
ー粒子としてのニッケル−亜鉛系フェライト２００重量
部とマンガン−亜鉛系フェライト２００重量部を配合さ
せ、周波数１８．０ＧＨｚにおける電磁波吸収率／電磁
波反射率の値を０．５３にしたものであり、第三電磁波
吸収層２３は、バインダーとしてのアクリルゴムラテッ
クス１００重量部に、フィラー粒子としてのニッケル−
亜鉛系フェライト８００重量部が配合させ、周波数１
８．０ＧＨｚにおける電磁波吸収率／電磁波反射率の値
を０．７８にしたものである。なお、以下の実施例及び
比較例は特に記載しない限り、本実施例と同様のもので
ある。Here, the base material 1 is made of aluminum foil, and the first electromagnetic wave absorption layer 21 has 100 parts by weight of acrylic rubber latex as a binder, 200 parts by weight of manganese-zinc ferrite as filler particles and 150 parts by weight of carbon. Parts, and the value of electromagnetic wave absorptivity / electromagnetic wave reflectivity at a frequency of 18.0 GHz is set to 0.05. The second electromagnetic wave absorption layer 22 is obtained by mixing 100 parts by weight of acrylic rubber latex as a binder with 200 parts by weight of nickel-zinc ferrite and 200 parts by weight of manganese-zinc ferrite as filler particles, and at a frequency of 18.0 GHz. The value of electromagnetic wave absorptivity / electromagnetic wave reflectivity is set to 0.53, and the third electromagnetic wave absorptive layer 23 includes 100 parts by weight of acrylic rubber latex as a binder and nickel as filler particles.
800 parts by weight of zinc-based ferrite is mixed, frequency 1
The value of the electromagnetic wave absorptance / electromagnetic wave reflectivity at 8.0 GHz is 0.78. The following examples and comparative examples are the same as this example unless otherwise specified.
【００１９】[0019]
【表１】 [Table 1]
【００２０】ここで、表１における電磁波吸収性は、表
中に記載した周波数の電磁波をネットワークアナライザ
ーで積層体へ照射した際の反射減衰量を測定した値であ
る。電磁波吸収性にあっては、実用可能な−３５．０ｄ
ｂ以下の値を示したものを合格とした。Here, the electromagnetic wave absorption in Table 1 is a value obtained by measuring the return loss when an electromagnetic wave having a frequency shown in the table is applied to the laminate by a network analyzer. Practical -35.0d for electromagnetic wave absorption
Those having a value of b or less were regarded as acceptable.
【００２１】本実施例にあっては、周波数１８．０ＧＨ
ｚの電磁波を吸収できる積層体が得られた。In this embodiment, the frequency is 18.0 GHz.
A laminate capable of absorbing the electromagnetic wave of z was obtained.
【００２２】実施例２の積層体は、実施例１の積層体に
おける、第一電磁波吸収層２１、第二電磁波吸収層２
２、第三電磁波吸収層２３の配合及び厚さを表１に記載
したとおりに変更し、周波数１０．９ＧＨｚにおける電
磁波吸収率／電磁波反射率の値をそれぞれ０．０８、
０．３７、０．９８に変更したものである。The laminate of Example 2 is the same as the laminate of Example 1 except that the first electromagnetic wave absorbing layer 21 and the second electromagnetic wave absorbing layer 2 are the same.
2, the composition and thickness of the third electromagnetic wave absorption layer 23 are changed as described in Table 1, and the value of electromagnetic wave absorption rate / electromagnetic wave reflectance at a frequency of 10.9 GHz is 0.08,
It was changed to 0.37 and 0.98.
【００２３】実施例２にあっては、周波数１０．９ＧＨ
ｚの電磁波を吸収できる積層体が得られた。In the second embodiment, the frequency is 10.9 GH.
A laminate capable of absorbing the electromagnetic wave of z was obtained.
【００２４】実施例３の積層体は、実施例１の積層体に
おける、第一電磁波吸収層２１、第二電磁波吸収層２
２、の配合及び厚さを表１に記載したとおりに変更し、
周波数７．３ＧＨｚにおける電磁波吸収率／電磁波反射
率の値をそれぞれ０．４６、０．８４に変更にすると共
に、第三電磁波吸収層２３を取り除いたものである。The laminate of Example 3 is the same as the laminate of Example 1, except that the first electromagnetic wave absorbing layer 21 and the second electromagnetic wave absorbing layer 2 are the same.
The composition and thickness of 2 were changed as described in Table 1,
The values of electromagnetic wave absorption rate / electromagnetic wave reflectance at a frequency of 7.3 GHz were changed to 0.46 and 0.84, respectively, and the third electromagnetic wave absorption layer 23 was removed.
【００２５】実施例３にあっては、周波数７．３ＧＨｚ
の電磁波を吸収できる積層体が得られた。In the third embodiment, the frequency is 7.3 GHz.
A laminate capable of absorbing the electromagnetic wave of was obtained.
【００２６】実施例４の積層体は、実施例１の積層体に
おける、第一電磁波吸収層２１、第二電磁波吸収層２
２、第三電磁波吸収層２３の配合及び厚さを表１に記載
したとおりに変更し、周波数５．８ＧＨｚにおける電磁
波吸収率／電磁波反射率の値をそれぞれ０．１６、０．
４０、０．８４に変更したものである。The laminate of Example 4 is the same as the laminate of Example 1 except that the first electromagnetic wave absorbing layer 21 and the second electromagnetic wave absorbing layer 2 are the same.
2. The composition and thickness of the third electromagnetic wave absorbing layer 23 were changed as described in Table 1, and the values of electromagnetic wave absorption rate / electromagnetic wave reflectance at a frequency of 5.8 GHz were 0.16, 0.
It was changed to 40 and 0.84.
【００２７】実施例４にあっては、周波数５．８ＧＨｚ
の電磁波を吸収できる積層体が得られた。In the fourth embodiment, the frequency is 5.8 GHz.
A laminate capable of absorbing the electromagnetic wave of was obtained.
【００２８】比較例１の積層体は、実施例１の積層体に
おける、第一電磁波吸収層２１と第三電磁波吸収層２３
の積層位置を入れ替えたものである。The laminate of Comparative Example 1 is the same as the laminate of Example 1 except that the first electromagnetic wave absorbing layer 21 and the third electromagnetic wave absorbing layer 23 are the same.
The stacking positions of are replaced.
【００２９】比較例１にあっては、各周波数において目
標とする電磁波吸収性が得られなかった。In Comparative Example 1, the target electromagnetic wave absorption was not obtained at each frequency.
【００３０】比較例２の積層体は、実施例２の積層体に
おける、第一電磁波吸収層２１と第三電磁波吸収層２３
の積層位置を入れ替えたものである。The laminate of Comparative Example 2 is the same as the laminate of Example 2 except that the first electromagnetic wave absorbing layer 21 and the third electromagnetic wave absorbing layer 23 are the same.
The stacking positions of are replaced.
【００３１】比較例２にあっては、各周波数において目
標とする電磁波吸収性が得られなかった。In Comparative Example 2, the target electromagnetic wave absorption was not obtained at each frequency.
【００３２】比較例３の積層体は、実施例３の積層体に
おける、第一電磁波吸収層２１と第二電磁波吸収層２２
の積層位置を入れ替えたものである。The laminated body of Comparative Example 3 is the same as the laminated body of Example 3 except that the first electromagnetic wave absorbing layer 21 and the second electromagnetic wave absorbing layer 22 are the same.
The stacking positions of are replaced.
【００３３】比較例３にあっては、各周波数において目
標とする電磁波吸収性が得られなかった。In Comparative Example 3, the target electromagnetic wave absorption was not obtained at each frequency.
【００３４】比較例４の積層体は、実施例４の積層体に
おける、第一電磁波吸収層２１と第三電磁波吸収層２３
の積層位置を入れ替えたものである。The laminate of Comparative Example 4 is the same as the laminate of Example 4, except that the first electromagnetic wave absorbing layer 21 and the third electromagnetic wave absorbing layer 23 are the same.
The stacking positions of are replaced.
【００３５】比較例４にあっては、各周波数において目
標とする電磁波吸収性が得られなかった。In Comparative Example 4, the target electromagnetic wave absorption was not obtained at each frequency.
【００３６】[0036]
【発明の効果】本発明にあっては、導電性を有する板状
の基材と、基材の一面へ積層された電磁波吸収体を有す
る積層体において、電磁波吸収体が、電磁波の入射側か
ら透過側へ向かって、電磁波吸収率／電磁波反射率の値
を次第に減少させたものとすることで、周波数の高い電
磁波であっても吸収できる積層体が得られた。According to the present invention, in a laminate having a plate-like base material having conductivity and an electromagnetic wave absorber laminated on one surface of the base material, the electromagnetic wave absorber is provided from the electromagnetic wave incident side. By gradually decreasing the values of electromagnetic wave absorption rate / electromagnetic wave reflectance toward the transmission side, a laminate capable of absorbing electromagnetic waves with high frequency was obtained.
【図１】 本発明にかかる実施例１の縦断面を模式的に
示した説明図である。FIG. 1 is an explanatory view schematically showing a vertical section of a first embodiment according to the present invention.
１ 基材 ２ 電磁波吸収体 ２１ 第一電磁波吸収層 ２２ 第二電磁波吸収層 ２３ 第三電磁波吸収層 1 base material 2 Electromagnetic wave absorber 21 First Electromagnetic Wave Absorption Layer 22 Second electromagnetic wave absorption layer 23 Third Electromagnetic Wave Absorption Layer
フロントページの続き Ｆターム(参考） 2E001 DH01 FA03 GA03 GA22 GA24 GA84 HA20 HB01 HB02 HB04 HB05 HB07 HB08 HD11 HE01 4F100 AA23 AA24 AA25 AA37 AB10 AB33 AK25J AK27J AN02 AT00A BA03 BA04 BA07 CA23B CA23C CA23D DE01B DE01C DE01D GB07 GB48 JD08B JD08C JD08D JD14B JD14C JD14D JG01A YY00B YY00C YY00D 5E321 BB25 BB33 BB51 GG11 Continued front page F-term (reference) 2E001 DH01 FA03 GA03 GA22 GA24 GA84 HA20 HB01 HB02 HB04 HB05 HB07 HB08 HD11 HE01 4F100 AA23 AA24 AA25 AA37 AB10 AB33 AK25J AK27J AN02 AT00A BA03 BA04 BA07 CA23B CA23C CA23D DE01B DE01C DE01D GB07 GB48 JD08B JD08C JD08D JD14B JD14C JD14D JG01A YY00B YY00C YY00D 5E321 BB25 BB33 BB51 GG11
Claims (3)
基材（１）の一面へ積層された電磁波吸収体（２）を有
する積層体において、該電磁波吸収体（２）が、該電磁
波の入射側から透過側へ向かって、電磁波吸収率／電磁
波反射率の値を次第に減少させたものであることを特徴
とする積層体。1. A laminate comprising an electroconductive plate-shaped substrate (1) and an electromagnetic wave absorber (2) laminated on one surface of the substrate (1), the electromagnetic wave absorber (2) being provided. Is a laminate in which the value of electromagnetic wave absorption rate / electromagnetic wave reflectance is gradually decreased from the incident side of the electromagnetic wave toward the transmission side thereof.
電磁波反射率の値が異なる複数の電磁波吸収層（２１、
２２、２３・・）を積層させたものであることを特徴と
する請求項１記載の積層体。2. The electromagnetic wave absorber (2) has an electromagnetic wave absorption rate /
A plurality of electromagnetic wave absorbing layers (21,
22. 23 ..) are laminated and the laminated body according to claim 1.
が、バインダー１００重量部に、フィラー粒子を１００
〜１０００重量部配合したものであることを特徴とする
請求項１及び請求項２記載の積層体。3. An electromagnetic wave absorbing layer (21, 22, 23 ...)
However, 100 parts by weight of binder and 100 parts of filler particles
The layered product according to claim 1 or 2, wherein the layered product is blended in an amount of 1000 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002008182A JP2003209388A (en) | 2002-01-17 | 2002-01-17 | Laminate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002008182A JP2003209388A (en) | 2002-01-17 | 2002-01-17 | Laminate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003209388A true JP2003209388A (en) | 2003-07-25 |
Family
ID=27646518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002008182A Pending JP2003209388A (en) | 2002-01-17 | 2002-01-17 | Laminate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003209388A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005084097A1 (en) * | 2004-02-27 | 2005-09-09 | Mitsubishi Gas Chemical Company, Inc. | Radio wave absorber and radio wave absorber manufacturing method |
| US7777664B2 (en) | 2004-09-06 | 2010-08-17 | Mitsubishi Gas Chemical Company, Inc. | Wave absorber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127400A (en) * | 1982-01-26 | 1983-07-29 | 東レ株式会社 | Radio wave absorber |
| JPS6482696A (en) * | 1987-09-25 | 1989-03-28 | Nec Corp | Radio wave absorber |
| JPH0384997A (en) * | 1989-08-28 | 1991-04-10 | Akzo Kashima Ltd | Electromagnetic wave absorber |
| JPH04211199A (en) * | 1990-03-05 | 1992-08-03 | Kansai Paint Co Ltd | Wave absorber |
| JP2000013083A (en) * | 1998-06-23 | 2000-01-14 | Daido Steel Co Ltd | High-performance electromagnetic-wave absorbing sheet |
| JP2000031686A (en) * | 1998-07-09 | 2000-01-28 | Daido Steel Co Ltd | Laminated electromagnetic wave absorber and production thereof |
-
2002
- 2002-01-17 JP JP2002008182A patent/JP2003209388A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58127400A (en) * | 1982-01-26 | 1983-07-29 | 東レ株式会社 | Radio wave absorber |
| JPS6482696A (en) * | 1987-09-25 | 1989-03-28 | Nec Corp | Radio wave absorber |
| JPH0384997A (en) * | 1989-08-28 | 1991-04-10 | Akzo Kashima Ltd | Electromagnetic wave absorber |
| JPH04211199A (en) * | 1990-03-05 | 1992-08-03 | Kansai Paint Co Ltd | Wave absorber |
| JP2000013083A (en) * | 1998-06-23 | 2000-01-14 | Daido Steel Co Ltd | High-performance electromagnetic-wave absorbing sheet |
| JP2000031686A (en) * | 1998-07-09 | 2000-01-28 | Daido Steel Co Ltd | Laminated electromagnetic wave absorber and production thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005084097A1 (en) * | 2004-02-27 | 2005-09-09 | Mitsubishi Gas Chemical Company, Inc. | Radio wave absorber and radio wave absorber manufacturing method |
| US7864095B2 (en) | 2004-02-27 | 2011-01-04 | Mitsubishi Gas Chemical Company, Inc. | Wave absorber and manufacturing method of wave absorber |
| US7777664B2 (en) | 2004-09-06 | 2010-08-17 | Mitsubishi Gas Chemical Company, Inc. | Wave absorber |
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