JPH0867544A - Composition for wave absorber, member for wave absorber and production of wave absorber and member for wave absorber - Google Patents
Composition for wave absorber, member for wave absorber and production of wave absorber and member for wave absorberInfo
- Publication number
- JPH0867544A JPH0867544A JP7136693A JP13669395A JPH0867544A JP H0867544 A JPH0867544 A JP H0867544A JP 7136693 A JP7136693 A JP 7136693A JP 13669395 A JP13669395 A JP 13669395A JP H0867544 A JPH0867544 A JP H0867544A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- wave absorber
- radio wave
- cement
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、１０００ＭＨｚ未満の
電波を効果的に吸収する電波吸収体を得るための電波吸
収体に係り、詳しくは電波吸収体用組成物、電波吸収体
用部材、電波吸収体および電波吸収体用部材の製造方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave absorber for obtaining a radio wave absorber that effectively absorbs radio waves of less than 1000 MHz, and more particularly to a composition for a radio wave absorber, a member for a radio wave absorber, and a radio wave. The present invention relates to a method for manufacturing an absorber and a member for a radio wave absorber.
【０００２】[0002]
【従来の技術】近年、高度情報化の進展に伴い、国内外
を問わず、情報機器による無線周波数妨害の件数は急増
する一方である。その事例としては、警察および官庁の
無線通信周波数を妨害したり、パソコンがテレビの無線
周波数を妨害するなど枚挙に遑がない。2. Description of the Related Art In recent years, with the progress of advanced information technology, the number of radio frequency interference caused by information devices has been rapidly increasing both in Japan and abroad. There are many examples of such cases, such as interference with the radio communication frequency of police and government agencies, and interference with the radio frequency of a television by a personal computer.
【０００３】このような電磁波妨害によって異常動作、
誤動作を生じ易い電子機器の進展に併せて、電磁波（Ｅ
ＭＩ）規制が世界的な課題となっている。米国ではＦＣ
Ｃ（米国連邦通信委員会）、独国では郵政省の技術機関
であるＦＴＺ（西独中央電気新技術局）が規制をしてい
る。国際的にはＩＥＣ（国際電気標準会議）およびその
下部組織であるＣＩＳＰＲ（国際無線障害特別委員会）
において、各種電気機器の電磁波妨害の限定値、測定
法、測定機器の企画を規制し、加盟各国に勧告してい
る。Abnormal operation due to such electromagnetic interference,
With the progress of electronic devices that are prone to malfunction, electromagnetic waves (E
MI) regulation has become a global issue. FC in the US
C (Federal Communications Commission), and in Germany, the FTZ (Central Electric New Technology Bureau), which is a technical organization of the Ministry of Posts and Telecommunications, regulates. Internationally, IEC (International Electrotechnical Commission) and its subordinate organization, CISPR (International Special Committee on Radio Interference)
Regulates the limit value of electromagnetic interference of various electric devices, measuring methods, and planning of measuring devices, and recommends to member countries.
【０００４】日本の電磁波妨害規制については、ＶＣＣ
Ｉ（情報処理装置電磁波障害自主規制評議会）により、
１９８６年から自主規制が実施されている。電子機器の
電磁波（ＥＭＩ）放射試験では、ＣＩＳＰＲ（国際無線
障害特別委員会）、ＦＣＣ（米国連邦通信委員会）、Ｖ
ＤＥなどの各規格により、測定周波数は３０ＭＨｚ〜１
０００ＭＨｚと規定されている。Regarding electromagnetic wave interference regulations in Japan, VCC
I (Information Processing Equipment Electromagnetic Interference Voluntary Control Council)
Self-regulation has been implemented since 1986. Electromagnetic wave (EMI) radiation tests include CISPR (International Commission on Radio Interference), FCC (US Federal Communications Commission), V
The measurement frequency is 30 MHz to 1 according to each standard such as DE.
It is specified as 000 MHz.
【０００５】そこで、入射してきた電波エネルギーを吸
収して熱エネルギーに変換する電波吸収体が用いられて
いる。最低周波数３０ＭＨｚの波長は１０ｍと極めて長
いことから、１００ＭＨｚ以下の低周波帯域で高い吸収
特性を得ることは困難であった。例えば、３０ＭＨｚ以
上の周波数帯域で２０ｄＢ以上の吸収量を得るために
は、カーボンを含浸させたウレタン吸収体では５ｍ以上
の長さが必要とされた。Therefore, a radio wave absorber that absorbs incident radio wave energy and converts it into heat energy is used. Since the wavelength of the lowest frequency 30 MHz is as long as 10 m, it was difficult to obtain high absorption characteristics in the low frequency band of 100 MHz or less. For example, in order to obtain an absorption amount of 20 dB or more in a frequency band of 30 MHz or more, a urethane absorber impregnated with carbon needs to have a length of 5 m or more.
【０００６】このように、ウレタン吸収体を用いて電波
暗室を設けた場合、電波吸収体の吸収性能不足により、
電波暗室の低周波特性が不十分であることが多かった。
近年、優れたフェライト電波吸収体が使われるようにな
り、電波吸収体の高性能化および小型化が飛躍的に進
み、フェライト電波吸収体のみでＡＮＳＩ Ｃ６３．４
に適合させることも可能となった。As described above, when the anechoic chamber is provided by using the urethane absorber, due to the insufficient absorption performance of the electromagnetic absorber,
The low frequency characteristics of the anechoic chamber were often insufficient.
In recent years, excellent ferrite electromagnetic wave absorbers have come to be used, and the performance and size of electromagnetic wave absorbers have been dramatically improved. ANSI C63.4 is used only with ferrite electromagnetic wave absorbers.
It has become possible to adapt to.
【０００７】フェライト電波吸収体は、１０ｃｍ×１０
ｃｍのフェライトタイルを使うのが一般的であるが、施
工時に生じるフェライトタイル間の微細な隙間により１
００ＭＨｚ以下の低周波帯域における吸収性能が劣化す
る欠点をもっている。フェライトとの組み合わせよるピ
ラミッド型電波吸収体でも、３０ＭＨｚ〜１０００ＭＨ
ｚ、中でも１００ＭＨｚ以下の低周波帯域での電波吸収
性能を確保するためには、長さ０．９ｍ〜２．７ｍと大
きなピラミッド型電波吸収体となる。The ferrite electromagnetic wave absorber is 10 cm × 10
It is common to use ferrite tiles with a size of 1 cm, but 1 due to the minute gaps between the ferrite tiles that occur during construction.
It has a drawback that the absorption performance in the low frequency band of 00 MHz or less is deteriorated. Even with a pyramid type electromagnetic wave absorber that is combined with ferrite, 30 MHz to 1000 MH
In order to secure the radio wave absorption performance in the low frequency band of z, especially 100 MHz or less, a large pyramid-type radio wave absorber having a length of 0.9 m to 2.7 m is used.
【０００８】このため、これら大型ピラミッド型電波吸
収体は、軽い素材でできていることが条件の１つとして
挙げられ、従来は、カーボンを含浸させた発泡ウレタン
（スポンジ）や発泡スチロールなどが、また、中空タイ
プのカーボンを混練したポリプロピレンなどのプラスチ
ック製品などのピラミッド型電波吸収体が用いられてい
た。For this reason, one of the conditions is that these large pyramid type electromagnetic wave absorbers are made of a light material. Conventionally, carbon-impregnated urethane foam (sponge), polystyrene foam, etc. Pyramid type electromagnetic wave absorbers such as plastic products such as polypropylene in which hollow type carbon was kneaded were used.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、これら
の材料は、大変燃え易いという欠点を有している。その
ため、これまで不燃性の材料が強く求められてきたが、
現在はニーズの増大に伴い、一層強く求められるように
なっている。米国においては、既に難燃性に対して規制
がなされるに至り、上述したウレタン材料に難燃剤を混
ぜた商品などが発表されているが、色々な欠点を有して
おり、未だ満足できるものが出現していない。However, these materials have the drawback of being very flammable. Therefore, there has been a strong demand for non-combustible materials,
Nowadays, with the increasing needs, there is a strong demand. In the United States, regulations have already been made regarding flame retardancy, and products such as the above-mentioned urethane materials mixed with flame retardants have been announced, but they have various drawbacks and are still satisfactory. Has not appeared.
【００１０】これまで、不燃性の材料とするため、難燃
剤として塩化アンチモンなどを混入したものがあるが、
劣化が早く、変形が生じたり、耐久性に劣る欠点があっ
た。一方、不燃性の材料として、発泡コンクリートやケ
イ酸カルシウム板などのセメント系材料を用いた電波吸
収体の試みもなされてきたが、重過ぎて使いづらい、電
波吸収体として製造しにくいなどの理由から商品化には
至っていない。Up to now, there have been mixed antimony chloride as a flame retardant in order to make it a nonflammable material.
There were drawbacks such as rapid deterioration, deformation, and poor durability. On the other hand, attempts have been made to use electromagnetic wave absorbers that use cement-based materials such as foamed concrete and calcium silicate plates as non-combustible materials, but they are too heavy to use and difficult to produce as electromagnetic wave absorbers. Has not been commercialized yet.
【００１１】また、カーボングラファイトを含浸して作
る電波吸収体では、カーボングラファイトの含浸量にば
らつきが生じ、製造管理の難しさと併せて、均質な電波
吸収体が得にくいという欠点がある。本発明はこのよう
な従来の問題点を解決するためになされたもので、その
目的は、既存の発泡ウレタンやプラスチックなどからな
る電波吸収体に代えて不燃性で超軽量の電波吸収体を提
供することにある。Further, the electromagnetic wave absorber impregnated with carbon graphite has a drawback that the impregnated amount of carbon graphite varies, and it is difficult to obtain a uniform electromagnetic wave absorber in addition to the difficulty of manufacturing control. The present invention has been made to solve such conventional problems, and an object thereof is to provide a nonflammable and ultralight wave absorber in place of the existing wave absorber made of urethane foam or plastic. To do.
【００１２】[0012]
【課題を解決するための手段】請求項１は、セメントと
軽量骨材と非導電性繊維と合成樹脂エマルションとで構
成したことを特徴とするものである。請求項２は、セメ
ントと軽量骨材と非導電性繊維と合成樹脂エマルション
と有機マイクロバルーンとカーボングラファイトとで構
成したことを特徴とするものである。According to a first aspect of the present invention, cement, lightweight aggregate, non-conductive fiber and synthetic resin emulsion are used. A second aspect of the present invention is characterized by being composed of cement, lightweight aggregate, non-conductive fibers, synthetic resin emulsion, organic microballoons, and carbon graphite.
【００１３】請求項３は、セメントと軽量骨材と非導電
性繊維と合成樹脂エマルションと有機マイクロバルーン
と炭素繊維とで構成したことを特徴とするものである。
請求項４は、セメントと軽量骨材と非導電性繊維と合成
樹脂エマルションと有機マイクロバルーンとカーボング
ラファイトと炭素繊維とで構成したことを特徴とするも
のである。A third aspect of the present invention is characterized by comprising cement, lightweight aggregate, non-conductive fiber, synthetic resin emulsion, organic microballoons, and carbon fiber.
A fourth aspect of the present invention is characterized by being composed of cement, lightweight aggregate, non-conductive fibers, synthetic resin emulsion, organic microballoons, carbon graphite, and carbon fibers.
【００１４】請求項５は、セメント１００重量部に対
し、軽量骨材１〜２０重量部と、合成樹脂エマルション
（固形分換算）１〜２０重量部と、非導電性繊維１〜５
重量部と、有機マイクロバルーン１〜１０重量部と、炭
素繊維０．０１〜５重量部とで構成したことを特徴とす
るものである。A fifth aspect of the present invention is based on 100 parts by weight of cement, 1 to 20 parts by weight of lightweight aggregate, 1 to 20 parts by weight of synthetic resin emulsion (as solid content), and 1 to 5 of non-conductive fibers.
1 part by weight, 1 to 10 parts by weight of organic micro-balloons, and 0.01 to 5 parts by weight of carbon fiber.
【００１５】請求項６は、セメント１００重量部に対
し、軽量骨材１〜２０重量部と、合成樹脂エマルション
（固形分換算）１〜２０重量部と、非導電性繊維１〜５
重量部と、有機マイクロバルーン１〜１０重量部と、カ
ーボングラファイト５〜２０重量部とで構成したことを
特徴とするものである。請求項７は、セメント１００重
量部に対し、軽量骨材１〜２０重量部と、合成樹脂エマ
ルション（固形分換算）１〜２０重量部と、非導電性繊
維１〜５重量部と、有機マイクロバルーン１〜１０重量
部と、カーボングラファイト５〜２０重量部と、炭素繊
維０．０１〜５重量部とで構成したことを特徴とするも
のである。A sixth aspect of the present invention is that 1 to 20 parts by weight of lightweight aggregate, 1 to 20 parts by weight of synthetic resin emulsion (as solid content), and 1 to 5 parts of non-conductive fiber are used with respect to 100 parts by weight of cement.
It is characterized in that it is composed of 1 part by weight, 1 to 10 parts by weight of organic microballoons, and 5 to 20 parts by weight of carbon graphite. Claim 7: 1 to 20 parts by weight of lightweight aggregate, 1 to 20 parts by weight of synthetic resin emulsion (as solid content), 1 to 5 parts by weight of non-conductive fiber, and organic micro, with respect to 100 parts by weight of cement. It is characterized by comprising 1 to 10 parts by weight of a balloon, 5 to 20 parts by weight of carbon graphite, and 0.01 to 5 parts by weight of carbon fiber.
【００１６】請求項８は、請求項１ないし請求項７の何
れかに記載された電波吸収体用組成物から成ることを特
徴とするものである。請求項９は、請求項８において、
電波吸収体用組成物の厚みが、３〜１０ｍｍであること
を特徴とするものである。請求項１０は、請求項１ない
し請求項７の何れかに記載された電波吸収体用組成物
と、この電波吸収体用組成物を積層する不燃性軽量薄板
とから成ることを特徴とするものである。An eighth aspect is characterized by comprising the composition for a radio wave absorber according to any one of the first to seventh aspects. Claim 9 is, in claim 8,
The radio wave absorber composition has a thickness of 3 to 10 mm. A tenth aspect of the invention is characterized by comprising the radio wave absorber composition according to any one of the first to seventh aspects and a nonflammable lightweight thin plate on which the radio wave absorber composition is laminated. Is.
【００１７】請求項１１は、請求項１０において、電波
吸収体用組成物の厚みが、３〜６ｍｍであることを特徴
とするものである。請求項１２は、請求項８ないし請求
項１１の何れかに記載された電波吸収用部材を、４角錐
状に組み立てるとともに、底面部にフェライトタイルを
貼りつけた板材と金属反射板とが取り付けられているこ
とを特徴とするものである。An eleventh aspect of the present invention is characterized in that, in the tenth aspect, the thickness of the radio wave absorber composition is 3 to 6 mm. According to a twelfth aspect, the electromagnetic wave absorbing member according to any one of the eighth to eleventh aspects is assembled into a quadrangular pyramid shape, and a plate material having a ferrite tile attached to a bottom surface portion and a metal reflection plate are attached. It is characterized by that.
【００１８】請求項１３は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、炭素繊維０．０１〜５重量部を予
め混練した材料とを水とともに混練した後、所定の形状
に成形することを特徴とするものである。In a thirteenth aspect, a powder in which 1 to 20 parts by weight of a lightweight aggregate is mixed with 100 parts by weight of cement and 4 to 100 parts by weight of a synthetic resin emulsion (solid content 22.5%) are used. Characteristically, 1 to 5 parts by weight of conductive fibers, 1 to 10 parts by weight of organic microballoons, and 0.01 to 5 parts by weight of carbon fibers are kneaded together with water and then molded into a predetermined shape. To do.
【００１９】請求項１４は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、カーボングラファイト５〜２０重
量部を予め混練した材料とを水とともに混練した後、所
定の形状に成形することを特徴とするものである。[0019] According to a fourteenth aspect, a powder in which 1 to 20 parts by weight of lightweight aggregate is mixed with 100 parts by weight of cement and 4 to 100 parts by weight of synthetic resin emulsion (solid content 22.5%) are used. Characteristically, 1 to 5 parts by weight of conductive fibers, 1 to 10 parts by weight of organic microballoons, and 5 to 20 parts by weight of carbon graphite are kneaded in advance with a material and then molded into a predetermined shape. Is.
【００２０】請求項１５は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、カーボングラファイト５〜２０重
量部、炭素繊維０．０１〜５重量部を予め混練した材料
とを水とともに混練した後、所定の形状に成形すること
を特徴とするものである。[0020] According to a fifteenth aspect, a powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement and 4 to 100 parts by weight of a synthetic resin emulsion (solid content 22.5%) are used. After kneading 1 to 5 parts by weight of conductive fibers, 1 to 10 parts by weight of organic microballoons, 5 to 20 parts by weight of carbon graphite, and 0.01 to 5 parts by weight of carbon fibers with a material previously kneaded with water, a predetermined amount is obtained. It is characterized by being shaped into a shape.
【００２１】請求項１６は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、炭素繊維０．０１〜５重量部を予
め混練した材料とを水とともに混練した後、不燃性軽量
薄板上に積層することを特徴とするものである。[0021] According to a sixteenth aspect, a powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement and 4 to 100 parts by weight of a synthetic resin emulsion (solid content 22.5%) are used. After kneading 1 to 5 parts by weight of conductive fibers, 1 to 10 parts by weight of organic microballoons, and 0.01 to 5 parts by weight of carbon fibers with a material previously kneaded with water, it is laminated on a noncombustible lightweight thin plate. It is a feature.
【００２２】請求項１７は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、カーボングラファイト５〜２０重
量部を予め混練した材料とを水とともに混練した後、不
燃性軽量薄板上に積層することを特徴とするものであ
る。[0022] In claim 17, a powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement and 4 to 100 parts by weight of a synthetic resin emulsion (solid content 22.5%) are used. Characteristically, 1 to 5 parts by weight of conductive fibers, 1 to 10 parts by weight of organic microballoons, and 5 to 20 parts by weight of carbon graphite are kneaded together with water and then laminated on a nonflammable lightweight thin plate. To do.
【００２３】請求項１８は、セメント１００重量部に対
し、軽量骨材１〜２０重量部を混合した粉体と、合成樹
脂エマルション（固形分２２．５％）４〜１００重量部
に対し、非導電性繊維１〜５重量部、有機マイクロバル
ーン１〜１０重量部、カーボングラファイト５〜２０重
量部、炭素繊維０．０１〜５重量部を予め混練した材料
とを水とともに混練した後、不燃性軽量薄板上に積層す
ることを特徴とするものである。[0023] According to claim 18, a powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement and 4 to 100 parts by weight of synthetic resin emulsion (solid content 22.5%) are used. Non-combustible after kneading 1-5 parts by weight of conductive fibers, 1-10 parts by weight of organic microballoons, 5-20 parts by weight of carbon graphite, 0.01-5 parts by weight of carbon fibers with a material previously kneaded with water. It is characterized by being laminated on a lightweight thin plate.
【００２４】[0024]
【作用】本発明において、セメントとしては、普通ポル
トランドセメント、早強ポルトランドセメント、超早強
ポルトランドセメント、超々早強ポルトランドセメント
などがある。本発明において、セメントを用いる理由と
しては、次のような事柄が挙げられる。■不燃性の硬化
体（電波吸収体）を得ることができる。■唯一の安価で
不燃性のマトリックス材料である。■どのような形状に
も自由に成形できる。In the present invention, examples of the cement include ordinary portland cement, early-strength portland cement, ultra-early-strength portland cement and ultra-super-early-strength portland cement. In the present invention, the reasons for using cement include the following. (3) It is possible to obtain a non-combustible cured body (radio wave absorber). ■ It is the only cheap and non-combustible matrix material. ■ Can be freely molded into any shape.
【００２５】軽量骨材としては、例えば粒径が５〜２０
０μｍ、比重０．３〜０．７程度の無機マイクロバルー
ン、セラミックバルーン、ケイ素，アルミニウムを主成
分とする鉱物系バルーンがあり、分類上での表現として
ケイ酸アルミニウム系バルーン、アルミナケイ酸塩バル
ーン、ガラスマイクロバルーン、シラスバルーンなどと
されるものを含む。The lightweight aggregate has, for example, a particle size of 5 to 20.
There are inorganic microballoons having a thickness of 0 μm and a specific gravity of 0.3 to 0.7, ceramic balloons, and mineral balloons containing silicon and aluminum as the main components, and as an expression in classification, aluminum silicate balloons and alumina silicate balloons are available. , Glass microballoons, shirasu balloons, etc. are included.
【００２６】無機マイクロバルーンは、有機マイクロバ
ルーンとともに軽量化を図るために用いられる。有機マ
イクロバルーンとしては、例えば粒径１０〜１００μ
ｍ、比重０．０４以下のもので、例えば塩化ビニリデ
ン、塩化ビニルなどがある。有機マイクロバルーンは超
軽量性に優れ、無機マイクロバルーンは耐火性能に優れ
ている。The inorganic microballoons are used together with the organic microballoons in order to reduce the weight. As the organic micro balloon, for example, a particle size of 10 to 100 μm
m and a specific gravity of 0.04 or less, such as vinylidene chloride and vinyl chloride. Organic microballoons are excellent in ultralightness, and inorganic microballoons are excellent in fire resistance.
【００２７】有機マイクロバルーンの量が多くなると、
耐火性能が劣ることとなり、無機マイクロバルーンの量
が多くなると、希望する重量より重くなる。このような
観点から、有機マイクロバルーン、無機マイクロバルー
ンの配合割合は求められた。As the amount of organic microballoons increases,
The fire resistance is inferior, and as the amount of inorganic microballoons increases, the weight becomes heavier than desired. From such a viewpoint, the blending ratio of the organic microballoons and the inorganic microballoons was obtained.
【００２８】すなわち、セメント１００重量部に対し、
軽量骨材（無機マイクロバルーン）１〜２０重量部と、
有機マイクロバルーン１〜１０重量部とした。有機マイ
クロバルーンと無機マイクロバルーンをバランス良く配
合することによって、超軽量の不燃性の電波吸収体が製
造できる。有機マイクロバルーンと無機マイクロバルー
ンとの両者を含む配合量の範囲は、これらの上限を越え
ると材料自体が脆くなり、下限未満になると目的とする
軽量性の材料が得られない。That is, with respect to 100 parts by weight of cement,
1 to 20 parts by weight of lightweight aggregate (inorganic microballoon),
It was 1 to 10 parts by weight of organic microballoons. By blending the organic microballoons and the inorganic microballoons in a well-balanced manner, an ultralight non-combustible radio wave absorber can be manufactured. If the content of both organic microballoons and inorganic microballoons exceeds the upper limits, the material itself becomes brittle, and if the content is less than the lower limits, the desired lightweight material cannot be obtained.
【００２９】合成樹脂エマルションとしては、アクリル
系、酢酸ビニール系、合成ゴム系、塩化ビニリデン系、
塩化ビニル系またはこれらの混合系がある。その一例を
挙げると、エチレン変成酢酸ビニール共重合体、アクリ
ルスチレン共重合体、スチレン−ブタジエン−ラバーな
どがある。使用されるピラミッド型電波吸収体として
は、０．９ｍ〜２．７ｍが多い。As the synthetic resin emulsion, acrylic type, vinyl acetate type, synthetic rubber type, vinylidene chloride type,
There are vinyl chloride type or mixed type of these. Examples thereof include ethylene-modified vinyl acetate copolymer, acrylic styrene copolymer, and styrene-butadiene-rubber. The pyramid type electromagnetic wave absorber used is often 0.9 m to 2.7 m.
【００３０】ここで、１．８ｍピラミッド型電波吸収体
について言えば、 ■取付作業に伴い作業性の観点から ■取付後の落下防止など安全上の観点から 目安として重量１０Ｋｇ前後が望ましい。なおかつ、不
燃性である。従来のカーボングラファイト含浸発泡ウレ
タンで作られて電波吸収体では２０Ｋｇ〜２５Ｋｇ前後
の重量があった。As for the 1.8 m pyramid type electromagnetic wave absorber, it is desirable to have a weight of about 10 kg as a guideline from the viewpoints of (1) workability associated with mounting work and (2) safety from falling after mounting. Moreover, it is nonflammable. A radio wave absorber made of conventional urethane foam impregnated with carbon graphite weighs about 20 kg to 25 kg.
【００３１】この重量を１０Ｋｇ以内に収めるために
は、本発明の電波吸収体用組成物の軽量性（比重γ≒
０．３〜０．４）を用いて、ピラミッド型電波吸収体を
作れば、肉厚が１０ｍｍ前後となる。軽量化と強度とは
相反する性質を有する。軽くすれば、強度は弱くなる。
本発明の電波吸収体用組成物については、軽量化に伴う
強度低下を補足するため補強用の繊維を混入する。In order to keep this weight within 10 kg, the light-absorbing composition of the present invention has a light weight (specific gravity γ≈).
If a pyramid-type electromagnetic wave absorber is made using 0.3 to 0.4), the wall thickness will be around 10 mm. Weight reduction and strength have the contradictory property. The lighter the strength, the weaker it becomes.
In the composition for a radio wave absorber of the present invention, a reinforcing fiber is mixed in order to supplement the strength reduction caused by weight reduction.
【００３２】補強用の繊維として、炭素繊維は導電性を
有するため、その量比が電波吸収性能に直接影響を及ぼ
す。従って、自ずと添加量が制限される。その炭素繊維
の補強材としの不足分に伴う材料強度の低下を補強する
ために、非導電性繊維を添加する。As the reinforcing fiber, carbon fiber has conductivity, and therefore its quantity ratio directly affects the radio wave absorption performance. Therefore, the addition amount is naturally limited. A non-conductive fiber is added to reinforce the decrease in material strength due to the shortage of the carbon fiber as a reinforcing material.
【００３３】この非導電性繊維の添加量は、セメント１
００重量部に対し、１〜５重量部とした。ここで、非導
電性繊維とは、ビニロン繊維、ナイロン繊維、ポリプロ
ピレン繊維、アクリロニトリル繊維、アラミド繊維、ガ
ラス繊維、セルロース、石綿、ロックウールなどをい
う。The amount of the non-conductive fiber added is 1 for cement.
It was 1 to 5 parts by weight with respect to 00 parts by weight. Here, the non-conductive fiber means vinylon fiber, nylon fiber, polypropylene fiber, acrylonitrile fiber, aramid fiber, glass fiber, cellulose, asbestos, rock wool and the like.
【００３４】カーボングラファイトは、微粒の炭素粉体
で、粒子径が約１５μｍ〜３８μｍである。この微粒の
炭素粉体としては、例えば、ケッチェン・ブラック・イ
ンターナショナル株式会社製（販売者：三菱化学株式会
社）のケッチェンブラックＥＣ（商品名）があり、この
微粒の炭素粉体は、粒子構造が特異な中空シェル状の構
造を持ち、通常の微粒の炭素粉体に比し３〜４倍程度導
電性に優れている。Carbon graphite is a fine carbon powder and has a particle diameter of about 15 μm to 38 μm. An example of the fine carbon powder is Ketjen Black EC (trade name) manufactured by Ketjen Black International Co., Ltd. (seller: Mitsubishi Chemical Co., Ltd.), and the fine carbon powder has a particle structure. Has a peculiar hollow shell-like structure, and is excellent in conductivity about 3 to 4 times that of ordinary fine carbon powder.
【００３５】ここで、この微粒の炭素粉体は、粒子径が
約１５μｍ〜３８μｍと微細なため、これを単独で用
い、セメント系マトリックス中に混練した場合、各炭素
粉体同士が接触・接近する割合が少なくなる。そのた
め、導電性の観点から、微粒の炭素粉体の単独使用は、
導電性の低下を招き好ましくない。そこで、本発明で
は、この微粒の炭素粉体のみによる欠点を導電性の微細
な繊維（炭素繊維）を添加することによって補ってい
る。Since the fine carbon powder has a fine particle diameter of about 15 μm to 38 μm, when it is used alone and kneaded in a cement matrix, the carbon powders come into contact with each other and come close to each other. The percentage to do will decrease. Therefore, from the viewpoint of conductivity, single use of fine carbon powder,
This is not preferable because it causes a decrease in conductivity. Therefore, in the present invention, the defects caused by only the fine carbon powder are compensated by adding conductive fine fibers (carbon fibers).
【００３６】炭素繊維としては、例えば繊維の長さ約６
ｍｍ、繊維径約７〜１８μｍのものを用いる。この導電
性の炭素繊維は、炭素粉体が分散したセメント系マトリ
ックス中に分散することによってセメント系マトリック
スの導電性を高めることになる。即ち、繊維同士の絡み
合いによる効果と、炭素粉体間の導電性の微細な繊維に
よる接続の効果が挙げられる。そして、この導電性の微
細な繊維は、セメントモルタル硬化体の強度（曲げ、引
っ張り等の強度）を補強する。又、セメントモルタル
（セメント水和物）の宿命である乾燥収縮によるひび割
れを、乾燥収縮応力を導電性の微細な繊維によって分散
させることによって防止することができる。As the carbon fiber, for example, the fiber length is about 6
mm, and fiber diameter of about 7-18 μm is used. This conductive carbon fiber enhances the conductivity of the cement matrix by being dispersed in the cement matrix in which the carbon powder is dispersed. That is, the effect of the entanglement of the fibers and the effect of the connection between the carbon powders by the fine conductive fibers can be mentioned. The electrically conductive fine fibers reinforce the strength (strength such as bending and tensile strength) of the hardened cement mortar. Further, cracking due to drying shrinkage, which is the destiny of cement mortar (cement hydrate), can be prevented by dispersing the drying shrinkage stress with fine conductive fibers.
【００３７】増粘剤は、水溶性高分子化合物である。こ
の水溶性高分子化合物としては、例えばメチルセルロー
ズ、ポリビニルアルコール、ヒドロキシエチルセルロー
ズなどがある。本発明における製造方法としては、電波
吸収体用組成物を混練後、例えば、型枠に流し込んで成
形するとか、型枠に吹き付けて成形するなど、また予め
所定の厚みの板材を作成し、これを補強組み立てて、ピ
ラミッド型電波吸収体を作成する。また、この場合、プ
レス成形などにより、または必要に応じて蒸気養生、オ
ートクレーブ養生を行う。The thickener is a water-soluble polymer compound. Examples of the water-soluble polymer compound include methyl cellulose, polyvinyl alcohol, hydroxyethyl cellulose and the like. As the production method in the present invention, after kneading the composition for a radio wave absorber, for example, by pouring into a mold or molding, or by spraying on the mold, a plate material having a predetermined thickness is prepared in advance. Reinforce and assemble to create a pyramid type electromagnetic wave absorber. Further, in this case, steam curing or autoclave curing is performed by press molding or as needed.
【００３８】また、現場における湿式材料としては、機
械による吹き付けの他、鏝塗りあるいは充填による施工
が可能である。ここで、カーボングラファイトと炭素繊
維は、均一な分散を図るため、予め合成樹脂エマルショ
ンとプレミックスされる。通常の混練によるセメント系
マトリックス中のカーボングラファイトと炭素繊維の分
散は、継粉になったりして分散がきわめて難しい。その
ため、繊維の分散にあたってはオムニミキサなどの特殊
ミキサが使用される。As the wet material at the site, blasting with a machine or trowel coating or filling can be applied. Here, the carbon graphite and the carbon fibers are premixed with the synthetic resin emulsion in order to achieve uniform dispersion. It is extremely difficult to disperse carbon graphite and carbon fibers in a cement-based matrix by ordinary kneading, because they are powdered. Therefore, a special mixer such as an omni mixer is used to disperse the fibers.
【００３９】しかし、予め合成樹脂エマルションとカー
ボングラファイトと炭素繊維をプレミックスしておけ
ば、セメントと軽量骨材との混練時に、通常のモルタル
ミキサでもきわめて良好にカーボングラファイトと炭素
繊維を分散させることができるとともに、マトリックス
の補強効果を高めることができる。その理由としては、
界面活性剤的性質を有する合成樹脂エマルションの採用
により、これら材料間の馴染みが電気化学的に改善され
ることが挙げられる。However, if the synthetic resin emulsion, carbon graphite and carbon fiber are pre-mixed in advance, the carbon graphite and carbon fiber can be dispersed very well even with a normal mortar mixer when the cement and the lightweight aggregate are kneaded. It is possible to enhance the matrix reinforcing effect. The reason is
The adoption of a synthetic resin emulsion having a surfactant-like property can improve electrochemically the familiarity between these materials.
【００４０】また、別の理由としては、合成樹脂エマル
ション中に炭素繊維とカーボングラファイトが共存する
ことにより、それらの相乗作用によって、物理的に分散
を助けることが挙げられる。また、本発明における製造
方法としては、電波吸収体用組成物を混練後、例えば、
周囲に枠を配した不燃性軽量薄板の上に３〜５ｍｍ程度
の厚さで積層することによって他板材との複合板として
作成することもできる。Another reason is that the coexistence of carbon fiber and carbon graphite in the synthetic resin emulsion helps the physical dispersion by the synergistic action of them. Further, as the manufacturing method in the present invention, after kneading the composition for a radio wave absorber, for example,
It can also be made as a composite plate with another plate material by laminating it on a non-combustible lightweight thin plate having a frame around it with a thickness of about 3 to 5 mm.
【００４１】この場合には、板材成形時に、型枠の底板
を兼ねるので、脱型が容易となり、製造上有利である。
ここで、不燃性軽量薄板としては、不燃性ボードなどが
あり、その厚みとしては５〜１０ｍｍ、電波吸収体用組
成物の厚みとしては１〜５ｍｍ程度である。電波吸収体
用組成物を型枠にて成形する場合には、電波吸収体用組
成物が固化するまで養生し、その後に搬送することとな
るが、不燃性軽量薄板上に積層する場合には、養生を待
たずにそのまま搬送できる。In this case, since it also serves as the bottom plate of the mold at the time of molding the plate material, it is easy to remove the mold, which is advantageous in manufacturing.
Here, as the non-combustible lightweight thin plate, there is a non-combustible board or the like, and the thickness thereof is 5 to 10 mm, and the thickness of the radio wave absorber composition is about 1 to 5 mm. When the composition for a radio wave absorber is molded in a mold, it is cured until the composition for a radio wave absorber is solidified, and then conveyed, but when laminated on a nonflammable lightweight thin plate It can be transported without waiting for curing.
【００４２】しかも、不燃性軽量薄板と複合化すること
により、強度が著しく大きくなる。例えば、７ｍｍ板厚
の不燃性軽量薄板に３ｍｍの電波吸収体用組成物を積層
した場合、比重０．４２、曲げ強度２６．６Ｋｇｆ／ｃ
ｍ2となる。このような複合板にしてピラミッド型の電
波吸収体を作成する場合には、板厚を１０ｍｍ程度とす
る必要があるため、電波吸収体用組成物の厚みを３〜５
ｍｍ程度としたい。その結果、電波吸収体用組成物中の
炭素繊維の割合を多くすることが望ましい。Moreover, the strength is remarkably increased by forming a composite with a nonflammable lightweight thin plate. For example, when a non-combustible lightweight thin plate having a thickness of 7 mm and a composition for a radio wave absorber having a thickness of 3 mm are laminated, a specific gravity is 0.42 and a bending strength is 26.6 Kgf / c.
It becomes m 2 . When a pyramid-type radio wave absorber is prepared using such a composite plate, the thickness of the radio wave absorber composition is 3 to 5 because the plate thickness needs to be about 10 mm.
I want to make it about mm. As a result, it is desirable to increase the proportion of carbon fibers in the composition for a radio wave absorber.
【００４３】[0043]
【実施例】以下、本発明の実施例を詳述する。 実施例１ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．２７重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。EXAMPLES Examples of the present invention will be described in detail below. Example 1 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.27 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, a small amount of a thickening agent, an antifoaming agent, an antiseptic agent and 150 parts by weight of city water were kneaded in advance, and then the high-strength Portland cement 100 was mixed.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００４４】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例２ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．１８重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical properties of the obtained plate-shaped member for electromagnetic wave absorber. Example 2 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.18 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, a small amount of a thickening agent, an antifoaming agent, an antiseptic agent and 150 parts by weight of city water were kneaded in advance, and then the high-strength Portland cement 100 was mixed.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００４５】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例３ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．０９２重量部、粒径５
〜１００μｍの有機マイクロバルーン５．３５重量部、
約３０μｍのカーボングラファイト４．２１重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical property values of the obtained plate-shaped electromagnetic wave absorber member. Example 3 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.092 parts by weight of carbon fiber having a fiber length of 6 mm, particle size 5
5.35 parts by weight of an organic microballoon of ˜100 μm,
About 30 μm of carbon graphite 4.21 parts by weight, a small amount of a thickener, a defoaming agent, an antiseptic and 150 parts by weight of city water were kneaded in advance.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００４６】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例４ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．１８重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、約
３０μｍのカーボングラファイト４．２１重量部、それ
に微量の増粘剤，消泡剤，防腐剤と市水１５０重量部を
予め混練し、これに早強ポルトランドセメント１００重
量部、粒径５〜２００μｍの無機マイクロバルーン（軽
量骨材）１１．８重量部をさらに加えて混練した後、型
枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical property values of the obtained plate-shaped electromagnetic wave absorber member. Example 4 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.18 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, 4.21 parts by weight of carbon graphite of about 30 μm, a small amount of thickener, defoaming agent, preservative and 150 parts by weight of city water are kneaded in advance, and the mixture is rapidly strengthened. 100 parts by weight of Portland cement and 11.8 parts by weight of inorganic microballoons (lightweight aggregate) having a particle size of 5 to 200 μm were further added and kneaded, and then filled in a mold to prepare a plate-shaped electromagnetic wave absorber member.
【００４７】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例５ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．０９２重量部、粒径５
〜１００μｍの有機マイクロバルーン５．３５重量部、
約３０μｍのカーボングラファイト８．４２重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical properties of the obtained plate-shaped member for electromagnetic wave absorber. Example 5 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.092 parts by weight of carbon fiber having a fiber length of 6 mm, particle size 5
5.35 parts by weight of an organic microballoon of ˜100 μm,
8.42 parts by weight of carbon graphite of about 30 μm, a small amount of a thickener, a defoaming agent, an antiseptic and 150 parts by weight of city water were kneaded in advance, and the high-strength Portland cement 100 was added.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００４８】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例６ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維１．３９重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical properties of the obtained plate-shaped member for electromagnetic wave absorber. Example 6 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
1.39 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, a small amount of a thickening agent, an antifoaming agent, an antiseptic agent and 150 parts by weight of city water were kneaded in advance, and then the high-strength Portland cement 100 was mixed.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００４９】得られた板状の電波吸収体用部材の物性値
を表１に示す。 実施例７ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維０．９２重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、型枠に詰めて板状の電波吸収体用部材を作成した。Table 1 shows the physical properties of the plate-shaped electromagnetic wave absorber member thus obtained. Example 7 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
0.92 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, a small amount of a thickening agent, an antifoaming agent, an antiseptic agent and 150 parts by weight of city water were kneaded in advance, and then the high-strength Portland cement 100 was mixed.
11.8 parts by weight of an inorganic microballoon (lightweight aggregate) having a weight part of 5 to 200 μm in particle size was further added and kneaded, and then filled in a mold to prepare a plate-shaped member for a radio wave absorber.
【００５０】得られた板状の電波吸収体用部材の物性値
を表１に示す。Table 1 shows the physical properties of the obtained plate-shaped member for electromagnetic wave absorber.
【表１】 実施例８ 次に、実施例１〜７により得られた電波吸収体用部材を
用いた電波吸収体のシミュレーションによる性能試験結
果を図１ないし図３に示す。[Table 1] Example 8 Next, FIG. 1 to FIG. 3 show performance test results by simulation of an electromagnetic wave absorber using the electromagnetic wave absorber members obtained in Examples 1 to 7.
【００５１】結果は、同軸管測定法（Ｓパラメータ法）
により求めた複素誘電率の値に基づき、図４に示す１８
００ｍｍフェライト複合吸収体の構成を想定したシミュ
レーションを行って求めた反射率（吸収率）の例を示し
た。ここで、１８００ｍｍフェライト複合吸収体は、高
さ１８００ｍｍ、肉厚１０ｍｍ、底面６０ｃｍ×６０ｃ
ｍの中空ピラミッド型吸収体１０と、１０ｃｍ×１０ｃ
ｍ、肉厚６．３ｍｍのフェライトタイルを貼りつけた板
材１１と、肉厚０．０１５ｃｍの金属反射板１２とで構
成されている。The result is the coaxial tube measurement method (S parameter method).
Based on the value of complex permittivity obtained by
An example of the reflectance (absorption rate) obtained by performing a simulation assuming the configuration of a 00 mm ferrite composite absorber is shown. Here, the 1800 mm ferrite composite absorber has a height of 1800 mm, a wall thickness of 10 mm, and a bottom surface of 60 cm × 60 c.
m hollow pyramid type absorber 10 and 10 cm × 10 c
It is composed of a plate material 11 to which a ferrite tile having a thickness of 6.3 mm and a thickness of 6.3 mm is attached, and a metal reflection plate 12 having a thickness of 0.015 cm.
【００５２】この中空ピラミッド型吸収体１０は、例え
ば、図５および図６に示すように、三角形状に成形した
４枚の板材１０ａを各斜辺が重なるように重ねるととも
に、内部コーナ部に当て木１０ｂをして外部より電波吸
収性能に影響を与えないプラスチックネジまたはプラス
チック釘１０ｃで止めることによって組み立てられる。In this hollow pyramid type absorber 10, for example, as shown in FIGS. 5 and 6, four plate members 10a formed in a triangular shape are stacked so that their oblique sides are overlapped with each other, and a batten is provided on an inner corner portion. It is assembled by fastening 10b and fixing with a plastic screw or a plastic nail 10c which does not affect the electromagnetic wave absorption performance from the outside.
【００５３】なお、三角形状に成形した４枚の板材１０
ａを接着剤で張り合わせても組み立てることができる。
図１において、(1)は実施例１の板状の電波吸収体用部
材を用いた値、(2)は実施例２の板状の電波吸収体用部
材を用いた値を示す。値(1)および(2)共に、１０ＭＨｚ
から３０ＭＨｚに向かって急激に吸収率が高まり、３０
ＭＨｚ〜１０００ＭＨｚにおいて、９０％以上の吸収率
を示している。The four plate members 10 formed in a triangular shape
It can also be assembled by bonding a with an adhesive.
In FIG. 1, (1) shows a value using the plate-shaped electromagnetic wave absorber member of Example 1, and (2) shows a value using the plate-shaped electromagnetic wave absorber member of Example 2. Both values (1) and (2) are 10MHz
From 30MHz to 30MHz
It shows an absorption rate of 90% or more in the MHz to 1000 MHz.
【００５４】更に詳しく見ると、値(1)と(2)において、
炭素繊維の添加量が多い値(1)の方が炭素繊維の添加量
が少ない値(2)に比して１０ＭＨｚ〜４０ＭＨｚにおい
て優るが、４０ＭＨｚ〜３００ＭＨｚにおいてはその特
性が逆転し、３００ＭＨｚ以上になると、炭素繊維の添
加量が多い値(1)の方が炭素繊維の添加量が少ない値(2)
に比して優れていることが示されている。Looking further in detail, in the values (1) and (2),
The value (1) with a large amount of carbon fiber added is superior to the value (2) with a small amount of carbon fiber added at 10 MHz to 40 MHz, but the characteristics are reversed at 40 MHz to 300 MHz, and the value becomes 300 MHz or more. In that case, a value with a large amount of carbon fiber added (1) is a value with a small amount of carbon fiber added (2)
Has been shown to be superior to.
【００５５】図２において、(3)は実施例３の板状の電
波吸収体用部材を用いた値、(4)は実施例４の板状の電
波吸収体用部材を用いた値、(5)は実施例５の板状の電
波吸収体用部材を用いた値を示す。値(3)ないし(5)共
に、１０ＭＨｚから３０ＭＨｚに向かって急激に吸収率
が高まり、３０ＭＨｚ〜１０００ＭＨｚにおいて、９０
％以上の吸収率を示している。In FIG. 2, (3) is a value using the plate-shaped electromagnetic wave absorber member of Example 3, (4) is a value using the plate-shaped electromagnetic wave absorber member of Example 4, ( 5) shows values using the plate-shaped member for electromagnetic wave absorber of Example 5. Both values (3) to (5) show a rapid increase in absorption rate from 10 MHz to 30 MHz, and at 30 MHz to 1000 MHz, 90%
It shows an absorption rate of not less than%.
【００５６】更に詳しく見ると、値(3)と(4)において、
炭素繊維の添加量が多い値(4)の方が炭素繊維の添加量
が少ない値(3)に比して１０ＭＨｚ〜４０ＭＨｚにおい
て優るが、４０ＭＨｚ〜３００ＭＨｚにおいてはその特
性が逆転し、３００ＭＨｚ以上になると、炭素繊維の添
加量が多い値(4)の方が炭素繊維の添加量が少ない値(3)
に比して優れていることが示されている。Looking further in detail, in the values (3) and (4),
The value (4) with a large amount of carbon fiber added is superior to the value (3) with a small amount of carbon fiber added at 10 MHz to 40 MHz, but at 40 MHz to 300 MHz, the characteristics are reversed, and the value becomes 300 MHz or more. In that case, a value with a large amount of carbon fiber added (4) is a value with a small amount of carbon fiber added (3)
Has been shown to be superior to.
【００５７】一方、値(5)は、炭素繊維の添加量は値(3)
と同じであるが、カーボングラファイトの添加量が値
(3)より多くなっているので、値(4)に近似した特性を示
している。図３において、(6)は実施例６の板状の電波
吸収体用部材を用いた値、(7)は実施例７の板状の電波
吸収体用部材を用いた値を示す。On the other hand, the value (5) is the amount of carbon fiber added (3)
Same as, but the amount of carbon graphite added is the value
Since it is larger than that of (3), it shows a characteristic close to the value (4). In FIG. 3, (6) shows a value using the plate-shaped electromagnetic wave absorber member of Example 6, and (7) shows a value using the plate-shaped electromagnetic wave absorber member of Example 7.
【００５８】値(6)および(7)共に、１０ＭＨｚから３０
ＭＨｚに向かって急激に吸収率が高まり、３０ＭＨｚ〜
１０００ＭＨｚにおいて、９０％以上の吸収率を示して
いる。更に詳しく見ると、値(6)と(7)において、炭素繊
維の添加量が多い値(6)の方が炭素繊維の添加量が少な
い値(7)に比して１０ＭＨｚ〜２５ＭＨｚにおいて優る
が、２５ＭＨｚ〜１５０ＭＨｚにおいてはその特性が逆
転し、１５０ＭＨｚ以上になると、炭素繊維の添加量が
多い値(6)の方が炭素繊維の添加量が少ない値(7)に比し
て優れていることが示されている。Both values (6) and (7) are from 10 MHz to 30.
Absorption rate increases rapidly toward MHz, 30MHz ~
It shows an absorption rate of 90% or more at 1000 MHz. In more detail, in the values (6) and (7), the value (6) in which the amount of carbon fiber added is larger is superior to the value (7) in which the amount of carbon fiber added is less, at 10 MHz to 25 MHz. , The characteristics are reversed in the range of 25MHz to 150MHz, and above 150MHz, the value with a large amount of carbon fiber (6) is superior to the value with a small amount of carbon fiber (7). It is shown.
【００５９】なお、シミュレーションの設定条件は図中
に示す通りである。また、反射率と吸収率の関係は、以
下に示す通りである。 Ｙ＝２０ｌｏｇ10Ｘ ここで、Ｙは反射量、Ｘは反射率（×１００％）を表
す。また、吸収率は、（１−Ｘ）×１００％で表され
る。The simulation setting conditions are as shown in the figure. The relationship between the reflectance and the absorptance is as shown below. Y = 20 log 10 X Here, Y represents the amount of reflection and X represents the reflectance (× 100%). The absorption rate is represented by (1−X) × 100%.
【００６０】なお、これらの値は、先の調合を変えるこ
とによって、任意に変えることができることから、必要
とする周波数領域の電波吸収体を作成することができ
る。また、本発明の電波吸収体用組成物は、型枠に流し
込んで色々な形に成形できるから、平板型の他に山形や
ピラミッド型など形状を変えることによって必要とする
電波吸収領域の電波吸収体を作ることができる。Since these values can be arbitrarily changed by changing the above-mentioned composition, a radio wave absorber in a required frequency range can be prepared. Further, since the composition for an electromagnetic wave absorber of the present invention can be cast into a mold to be molded into various shapes, by changing the shape such as a mountain shape or a pyramid shape in addition to a flat plate shape, the electromagnetic wave absorption region of a required electromagnetic wave absorption area can be obtained. You can make a body.
【００６１】さらに、シミュレーション結果に示すよう
に、フェライトや金属板などの組み合わせによっても、
同様に必要とする吸収領域の電波吸収体を作ることがで
きる。 実施例９ エチレン酢酸ビニルエマルション（合成樹脂エマルショ
ン）（固形分２２．５％）４４．９重量部（固形分１
０．１重量部）に対し、ビニロン繊維２．４８重量部、
繊維長さ約６ｍｍの炭素繊維１．８４重量部、粒径５〜
１００μｍの有機マイクロバルーン５．３５重量部、そ
れに微量の増粘剤，消泡剤，防腐剤と市水１５０重量部
を予め混練し、これに早強ポルトランドセメント１００
重量部、粒径５〜２００μｍの無機マイクロバルーン
（軽量骨材）１１．８重量部をさらに加えて混練した
後、板厚７ｍｍの不燃性軽量薄板の周囲に枠を配した型
枠に詰めて複合板としての電波吸収体用部材を作成し
た。Further, as shown in the simulation result, the combination of ferrite, metal plate, etc.
Similarly, a radio wave absorber having a required absorption region can be made. Example 9 Ethylene vinyl acetate emulsion (synthetic resin emulsion) (solid content 22.5%) 44.9 parts by weight (solid content 1
0.1 parts by weight), 2.48 parts by weight of vinylon fiber,
1.84 parts by weight of carbon fiber having a fiber length of about 6 mm and a particle size of 5
5.35 parts by weight of 100 μm organic microballoons, a small amount of a thickening agent, an antifoaming agent, an antiseptic agent and 150 parts by weight of city water were kneaded in advance, and then the high-strength Portland cement 100 was mixed.
11.8 parts by weight of inorganic microballoons (lightweight aggregate) having a weight part of 5 to 200 μm and further kneading, and then packed in a formwork in which a frame is arranged around a noncombustible lightweight thin plate having a plate thickness of 7 mm. A member for a radio wave absorber as a composite plate was created.
【００６２】ここで、電波吸収体用部材としては、板厚
３ｍｍ、４ｍｍ、５ｍｍ、６ｍｍの４種類を作成した。
この電波吸収体用部材は、図７に示すように、不燃性軽
量薄板２０上に電波吸収体用組成物２１が積層されたも
のである。これらの電波吸収体用部材を用いた電波吸収
体のシミュレーションによる性能試験結果を図８に示
す。Here, as the electromagnetic wave absorber member, four types having plate thicknesses of 3 mm, 4 mm, 5 mm and 6 mm were prepared.
As shown in FIG. 7, this radio wave absorber member is obtained by laminating a radio wave absorber composition 21 on a nonflammable lightweight thin plate 20. FIG. 8 shows the performance test results by simulation of the electromagnetic wave absorber using these electromagnetic wave absorber members.
【００６３】結果は、同軸管測定法（Ｓパラメータ法）
により求めた複素誘電率の値に基づき、図４に示す１８
００ｍｍフェライト複合吸収体の構成を想定したシミュ
レーションを行って求めた反射率（吸収率）の例を示し
た。ここで、１８００ｍｍフェライト複合吸収体は、高
さ１８００ｍｍ、肉厚１０ｍｍ〜１３ｍｍ、底面６０ｃ
ｍ×６０ｃｍの中空ピラミッド型吸収体１０と、１０ｃ
ｍ×１０ｃｍ、肉厚６．３ｍｍのフェライトタイルを貼
りつけた板材１１と、肉厚０．０１５ｃｍの金属反射板
１２とで構成されている。The result is the coaxial tube measurement method (S parameter method).
Based on the value of complex permittivity obtained by
An example of the reflectance (absorption rate) obtained by performing a simulation assuming the configuration of a 00 mm ferrite composite absorber is shown. Here, the 1800 mm ferrite composite absorber has a height of 1800 mm, a wall thickness of 10 mm to 13 mm, and a bottom surface 60c.
m × 60 cm hollow pyramid type absorber 10 and 10c
It is composed of a plate material 11 to which a ferrite tile having m × 10 cm and a wall thickness of 6.3 mm is attached, and a metal reflection plate 12 having a wall thickness of 0.015 cm.
【００６４】図８において、(8)は板厚３ｍｍの板状の
電波吸収材用部材を用いた値、(9)は板厚４ｍｍの板状
の電波吸収材用部材を用いた値、(10)は板厚５ｍｍの板
状の電波吸収材用部材を用いた値、(11)は板厚６ｍｍの
板状の電波吸収材用部材を用いた値を示す。値(8)ない
し(11)は、実施例７と同様に、１０ＭＨｚから３０ＭＨ
ｚに向かって急激に吸収率が高まり、３０ＭＨｚ〜１０
００ＭＨｚにおいて、９０％以上の吸収率を示してい
る。In FIG. 8, (8) is a value using a plate-shaped electromagnetic wave absorbing member having a plate thickness of 3 mm, (9) is a value using a plate-shaped electromagnetic wave absorbing member having a plate thickness of 4 mm, ( 10) shows a value using a plate-shaped wave absorber member having a plate thickness of 5 mm, and (11) shows a value using a plate-shaped wave absorber member having a plate thickness of 6 mm. The values (8) to (11) are from 10 MHz to 30 MH as in Example 7.
Absorption rate rapidly increases toward z, 30MHz-10
At 00 MHz, it shows an absorption rate of 90% or more.
【００６５】更に詳しく見ると、１０ＭＨｚ〜４０ＭＨ
Ｚにおいては、板厚の薄い(8)〜厚い(11)の順に吸収率
が優れており、４０ＭＨｚ〜２５０ＭＨｚにおいて、逆
に板厚の薄い(8)が最も吸収率が優れており、３００Ｍ
Ｈｚ以上になると、１０ＭＨｚ〜４０ＭＨＺと同様に、
板厚の薄い(8)〜厚い(11)の順に吸収率が優れているこ
とが示されている。Looking more closely, 10 MHz to 40 MH
In Z, the absorption rate is excellent in the order of thin plate thickness (8) to thick (11), and conversely, in 40 MHz to 250 MHz, the thin plate thickness (8) has the highest absorption rate of 300M.
If it becomes higher than Hz, like 10 MHz to 40 MHZ,
It is shown that the absorption rate is excellent in the order of thin plate (8) to thick plate (11).
【００６６】[0066]
【発明の効果】以上のように、本発明に係る電波吸収体
用組成物は、セメントと軽量骨材と非導電性繊維と合成
樹脂エマルションを主成分とするから、次のような効果
を有する。型枠に流し込み、色々な形状の電波吸収体を
作ることができる。As described above, the radio wave absorber composition according to the present invention has the following effects because it contains cement, lightweight aggregate, non-conductive fiber and synthetic resin emulsion as main components. . It can be poured into a mold to make various shapes of electromagnetic wave absorbers.
【００６７】フィルム状のものから厚いものまでどのよ
うな厚さのものも製造できる。不燃性である。超軽量で
取扱が容易である。強度が従来の有機質系電波吸収体に
比べて強い。耐久性に優れている。Any thickness, from film-like to thick, can be manufactured. It is nonflammable. Super lightweight and easy to handle. The strength is stronger than the conventional organic electromagnetic wave absorber. Has excellent durability.
【００６８】カッターや鋸で切断できるため、色々な形
に加工できる。壁や天井への取付施工が容易であり、釘
打ちができる。湿式により、鏝塗りや吹付による施工も
できる。また、カーボングラファイトや炭素繊維の配合
割合によって、必要とする吸収領域の電波吸収体を自由
に調整することができる。Since it can be cut with a cutter or a saw, it can be processed into various shapes. It can be easily installed on a wall or ceiling and nailed. Wet coating can also be applied by trowel coating or spraying. Also, the radio wave absorber in the required absorption region can be freely adjusted by the blending ratio of carbon graphite or carbon fiber.
【００６９】本発明の電波吸収体用部材は、セメントと
軽量骨材と非導電性繊維と合成樹脂エマルションを主成
分とする電波吸収体用組成物で所望の形状に成形するも
のであるから、電波吸収体用組成物の肉厚を１０ｍｍ程
度で必要とする低周波数の電波を効果的に吸収すること
ができる。しかも、電波吸収体用組成物には、非導電性
繊維や炭素繊維などが配合されているため、これらによ
る補強効果が発揮され、薄くても電波吸収体に要求され
る機械的強度を確保することができる。The radio wave absorber member of the present invention is formed into a desired shape from a radio wave absorber composition mainly composed of cement, lightweight aggregate, non-conductive fibers and synthetic resin emulsion. When the thickness of the composition for a radio wave absorber is about 10 mm, it is possible to effectively absorb low frequency radio waves required. Moreover, since the composition for the electromagnetic wave absorber contains non-conductive fiber, carbon fiber, etc., the reinforcing effect is exerted by these, and the mechanical strength required for the electromagnetic wave absorber is secured even if it is thin. be able to.
【００７０】本発明の電波吸収体用部材は、セメントと
軽量骨材と非導電性繊維と合成樹脂エマルションを主成
分とする電波吸収体用組成物が、不燃性軽量薄板上に積
層されているので、電波吸収体用組成物の肉厚を１０ｍ
ｍ程度必要としたものを、１〜５ｍｍ程度の厚みとする
ことが可能となる。そのため、電波吸収体用組成物の量
が少なくなり、コストダウンとなる。また、電波吸収体
用組成物には、非導電性繊維や炭素繊維などが配合され
ているため、これらによる補強効果が発揮され、強度的
に難点のある不燃性軽量薄板の強度を補うことが可能と
なり、特に曲げ強度に優れた複合体として機能する。In the member for the radio wave absorber of the present invention, the composition for the radio wave absorber containing cement, the lightweight aggregate, the non-conductive fiber and the synthetic resin emulsion as the main components is laminated on the non-combustible lightweight thin plate. Therefore, the thickness of the composition for electromagnetic wave absorber is 10m
The required thickness of about m can be reduced to about 1 to 5 mm. Therefore, the amount of the radio wave absorber composition is reduced, and the cost is reduced. In addition, since the composition for a radio wave absorber contains non-conductive fibers, carbon fibers, etc., a reinforcing effect is exhibited by these, and it is possible to supplement the strength of the non-combustible lightweight thin plate, which has difficulty in strength. It becomes possible and functions as a composite having excellent bending strength.
【図１】実施例１および２の組成物を用いた中空ピラミ
ッド型電波吸収体の電波吸収特性を示すグラフである。FIG. 1 is a graph showing the radio wave absorption characteristics of hollow pyramid type radio wave absorbers using the compositions of Examples 1 and 2.
【図２】実施例３ないし５の組成物を用いた中空ピラミ
ッド型電波吸収体の電波吸収特性を示すグラフである。FIG. 2 is a graph showing radio wave absorption characteristics of hollow pyramid type radio wave absorbers using the compositions of Examples 3 to 5.
【図３】実施例６および７の組成物を用いた中空ピラミ
ッド型電波吸収体の電波吸収特性を示すグラフである。FIG. 3 is a graph showing the radio wave absorption characteristics of hollow pyramid type radio wave absorbers using the compositions of Examples 6 and 7.
【図４】ピラミッド型電波吸収体を示す斜視図である。FIG. 4 is a perspective view showing a pyramidal electromagnetic wave absorber.
【図５】図４に示すピラミッド型電波吸収体の組立の一
例を示す内側から見た説明図である。5 is an explanatory view seen from the inside, showing an example of assembly of the pyramidal electromagnetic wave absorber shown in FIG. 4. FIG.
【図６】図４に示すピラミッド型電波吸収体の組立の一
例を示す外側から見た説明図である。6 is an explanatory view seen from the outside, showing an example of assembly of the pyramid type electromagnetic wave absorber shown in FIG. 4. FIG.
【図７】実施例９に示す電波吸収体用部材を示す斜視図
である。FIG. 7 is a perspective view showing a member for a radio wave absorber according to a ninth embodiment.
【図８】実施例９の組成物を用いた中空ピラミッド型電
波吸収体の電波吸収特性を示すグラフである。FIG. 8 is a graph showing the radio wave absorption characteristics of a hollow pyramid type radio wave absorber using the composition of Example 9.
１０ 中空ピラミッド型吸収体 １１ フェライトタイルを貼りつけた板材 １２ 金属反射板 ２０ 不燃性軽量薄板 ２１ 電波吸収体用組成物 10 Hollow Pyramid Type Absorber 11 Plate Material with Ferrite Tile 12 Metal Reflector 20 Nonflammable Lightweight Thin Plate 21 Composition for Radio Wave Absorber
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 16:06 Ｇ 16:08） 111:94 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area C04B 16:06 G 16:08) 111: 94
Claims (18)
成樹脂エマルションとで構成したことを特徴とする電波
吸収体用組成物。1. A composition for a radio wave absorber comprising cement, a lightweight aggregate, a non-conductive fiber and a synthetic resin emulsion.
成樹脂エマルションと有機マイクロバルーンとカーボン
グラファイトとで構成したことを特徴とする電波吸収体
用組成物。2. A radio wave absorber composition comprising cement, lightweight aggregate, non-conductive fibers, synthetic resin emulsion, organic microballoons, and carbon graphite.
成樹脂エマルションと有機マイクロバルーンと炭素繊維
とで構成したことを特徴とする電波吸収体用組成物。3. A composition for a radio wave absorber comprising cement, lightweight aggregate, non-conductive fiber, synthetic resin emulsion, organic microballoons, and carbon fiber.
成樹脂エマルションと有機マイクロバルーンとカーボン
グラファイトと炭素繊維とで構成したことを特徴とする
電波吸収体用組成物。4. A radio wave absorber composition comprising cement, lightweight aggregate, non-conductive fibers, synthetic resin emulsion, organic microballoons, carbon graphite and carbon fibers.
１〜２０重量部と、合成樹脂エマルション（固形分換
算）１〜２０重量部と、非導電性繊維１〜５重量部と、
有機マイクロバルーン１〜１０重量部と、炭素繊維０．
０１〜５重量部とで構成したことを特徴とする電波吸収
体用組成物。5. A lightweight aggregate 1 to 20 parts by weight, a synthetic resin emulsion (as solid content) 1 to 20 parts by weight, and a non-conductive fiber 1 to 5 parts by weight, relative to 100 parts by weight of cement.
1 to 10 parts by weight of organic microballoons, and carbon fibers of 0.
A composition for a radio wave absorber, characterized in that it is composed of 01 to 5 parts by weight.
１〜２０重量部と、合成樹脂エマルション（固形分換
算）１〜２０重量部と、非導電性繊維１〜５重量部と、
有機マイクロバルーン１〜１０重量部と、カーボングラ
ファイト５〜２０重量部とで構成したことを特徴とする
電波吸収体用組成物。6. A lightweight aggregate 1 to 20 parts by weight, a synthetic resin emulsion (solid content conversion) 1 to 20 parts by weight, and a non-conductive fiber 1 to 5 parts by weight with respect to 100 parts by weight of cement.
A radio wave absorber composition comprising 1 to 10 parts by weight of organic microballoons and 5 to 20 parts by weight of carbon graphite.
１〜２０重量部と、合成樹脂エマルション（固形分換
算）１〜２０重量部と、非導電性繊維１〜５重量部と、
有機マイクロバルーン１〜１０重量部と、カーボングラ
ファイト５〜２０重量部と、炭素繊維０．０１〜５重量
部とで構成したことを特徴とする電波吸収体用組成物。7. 1 to 20 parts by weight of lightweight aggregate, 1 to 20 parts by weight of synthetic resin emulsion (as solid content), and 1 to 5 parts by weight of non-conductive fiber, relative to 100 parts by weight of cement.
A composition for a radio wave absorber, comprising 1 to 10 parts by weight of organic microballoons, 5 to 20 parts by weight of carbon graphite, and 0.01 to 5 parts by weight of carbon fibers.
された電波吸収体用組成物から成ることを特徴とする電
波吸収体用部材。8. A radio wave absorber member comprising the radio wave absorber composition according to any one of claims 1 to 7.
の厚みが、３〜１０ｍｍであることを特徴とする電波吸
収体用部材。9. The member for a radio wave absorber according to claim 8, wherein the composition for the radio wave absorber has a thickness of 3 to 10 mm.
載された電波吸収体用組成物と、この電波吸収体用組成
物を積層する不燃性軽量薄板とから成ることを特徴とす
る電波吸収体用部材。10. A radio wave comprising the radio wave absorber composition according to any one of claims 1 to 7 and a nonflammable lightweight thin plate on which the radio wave absorber composition is laminated. Absorber member.
成物の厚みが、３〜６ｍｍであることを特徴とする電波
吸収体用部材。11. The radio wave absorber member according to claim 10, wherein the thickness of the radio wave absorber composition is 3 to 6 mm.
記載された電波吸収用部材を、４角錐状に組み立てると
ともに、底面部にフェライトタイルを貼りつけた板材と
金属反射板とが取り付けられていることを特徴とする電
波吸収体。12. The radio wave absorbing member according to claim 8 is assembled into a quadrangular pyramid shape, and a plate material having a ferrite tile attached to a bottom surface thereof and a metal reflecting plate are attached. An electromagnetic wave absorber characterized by being.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、炭素繊維０．０１〜５重量
部を予め混練した材料とを水とともに混練した後、所定
の形状に成形することを特徴とする電波吸収体用部材の
製造方法。13. A powder obtained by mixing 1 to 20 parts by weight of a lightweight aggregate with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic micro-balloons, and 0.01 to 5 parts by weight of carbon fibers are mixed with water in advance, and then kneaded with water to give a predetermined shape. A method for manufacturing a member for a radio wave absorber, which comprises molding.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、カーボングラファイト５〜
２０重量部を予め混練した材料とを水とともに混練した
後、所定の形状に成形することを特徴とする電波吸収体
用部材の製造方法。14. A powder in which 1 to 20 parts by weight of a lightweight aggregate is mixed with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic microballoons, 5 to 5 parts by weight of carbon graphite, based on parts by weight.
A method for producing a member for a radio wave absorber, which comprises kneading 20 parts by weight of a material previously kneaded with water and then molding the material into a predetermined shape.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、カーボングラファイト５〜
２０重量部、炭素繊維０．０１〜５重量部を予め混練し
た材料とを水とともに混練した後、所定の形状に成形す
ることを特徴とする電波吸収体用部材の製造方法。15. A powder in which 1 to 20 parts by weight of lightweight aggregate is mixed with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic microballoons, 5 to 5 parts by weight of carbon graphite, based on parts by weight.
A method for producing a member for a radio wave absorber, which comprises kneading 20 parts by weight and a material in which 0.01 to 5 parts by weight of carbon fibers are previously kneaded with water and then molding the material into a predetermined shape.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、炭素繊維０．０１〜５重量
部を予め混練した材料とを水とともに混練した後、 不燃性軽量薄板上に積層することを特徴とする電波吸収
体用部材の製造方法。16. A powder obtained by mixing 1 to 20 parts by weight of a lightweight aggregate with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
Non-combustible lightweight thin plate after kneading together with water a material prepared by previously kneading 1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic microballoons, and 0.01 to 5 parts by weight of carbon fibers with respect to parts by weight. A method for manufacturing a member for a radio wave absorber, characterized by being laminated on top.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、カーボングラファイト５〜
２０重量部を予め混練した材料とを水とともに混練した
後、 不燃性軽量薄板上に積層することを特徴とする電波吸収
体用部材の製造方法。17. A powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic microballoons, 5 to 5 parts by weight of carbon graphite, based on parts by weight.
A method for producing a member for a radio wave absorber, which comprises kneading 20 parts by weight of a material previously kneaded with water and then laminating the material on a nonflammable lightweight thin plate.
材１〜２０重量部を混合した粉体と、 合成樹脂エマルション（固形分２２．５％）４〜１００
重量部に対し、非導電性繊維１〜５重量部、有機マイク
ロバルーン１〜１０重量部、カーボングラファイト５〜
２０重量部、炭素繊維０．０１〜５重量部を予め混練し
た材料とを水とともに混練した後、 不燃性軽量薄板上に積層することを特徴とする電波吸収
体用部材の製造方法。18. A powder obtained by mixing 1 to 20 parts by weight of lightweight aggregate with 100 parts by weight of cement, and a synthetic resin emulsion (solid content 22.5%) 4 to 100.
1 to 5 parts by weight of non-conductive fibers, 1 to 10 parts by weight of organic microballoons, 5 to 5 parts by weight of carbon graphite, based on parts by weight.
A method for producing a member for a radio wave absorber, comprising: kneading 20 parts by weight and a material obtained by previously kneading 0.01 to 5 parts by weight of carbon fiber with water and laminating the kneaded material on a nonflammable lightweight thin plate.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13669395A JP3394848B2 (en) | 1994-06-23 | 1995-06-02 | Radio wave absorber member, radio wave absorber, and method of manufacturing radio wave absorber member |
| DE69513572T DE69513572T2 (en) | 1994-06-23 | 1995-06-13 | Wave-absorbing composition, absorber element for radio waves, radio wave absorber and method for producing absorber elements |
| EP95109129A EP0689262B1 (en) | 1994-06-23 | 1995-06-13 | Wave absorber composition, radio wave absorber member, radio wave absorber and method for producing wave absorber member |
| CA002151784A CA2151784C (en) | 1994-06-23 | 1995-06-14 | Wave absorber composition, radio wave absorber member, radio wave absorber, and method of producing radio wave absorber member |
| US08/493,812 US5932054A (en) | 1994-06-23 | 1995-06-22 | Radio wave absorber composition, radio wave absorber member, radio wave absorber, and method for producing radio wave absorber member |
| US09/209,899 US6245434B1 (en) | 1994-06-23 | 1998-12-11 | Radio wave absorber composition, radio wave absorber member, radio wave absorber, and method for producing radio wave absorber member |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14191494 | 1994-06-23 | ||
| JP6-141914 | 1994-06-23 | ||
| JP13669395A JP3394848B2 (en) | 1994-06-23 | 1995-06-02 | Radio wave absorber member, radio wave absorber, and method of manufacturing radio wave absorber member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0867544A true JPH0867544A (en) | 1996-03-12 |
| JP3394848B2 JP3394848B2 (en) | 2003-04-07 |
Family
ID=26470199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13669395A Expired - Fee Related JP3394848B2 (en) | 1994-06-23 | 1995-06-02 | Radio wave absorber member, radio wave absorber, and method of manufacturing radio wave absorber member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3394848B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0982801A2 (en) | 1998-08-28 | 2000-03-01 | TDK Corporation | Incombustible honeycomb radio absorptive material and radio absorber using the same |
| JP2000072510A (en) * | 1998-08-26 | 2000-03-07 | Taiheiyo Cement Corp | Cement composition |
| US6407693B1 (en) | 1999-01-21 | 2002-06-18 | Tdk Corporation | Radio wave absorbent assembling member radio wave absorbent and method for producing the same |
| US6479140B1 (en) | 1997-11-12 | 2002-11-12 | Otsuka Chemical Co., Ltd. | Radio wave absorbing materials, radio wave absorber, and radio wave anechoic chamber and the like made by using the same |
| US6613975B1 (en) | 1998-10-05 | 2003-09-02 | Tdk Corporation | Member for assembling radio wave absorber and method of producing radio wave absorber |
| JP2004119855A (en) * | 2002-09-27 | 2004-04-15 | Ig Tech Res Inc | Electromagnetic wave absorber |
| WO2004060037A1 (en) * | 2002-12-25 | 2004-07-15 | Toray Industries, Inc. | Sheet material for radio wave-absorbing body and radio wave-absorbing body |
| JPWO2003064780A1 (en) * | 2002-01-31 | 2005-05-26 | 日東紡績株式会社 | Electromagnetic wave absorber |
| JP2005333125A (en) * | 2004-04-23 | 2005-12-02 | Yokohama Rubber Co Ltd:The | Radio wave absorber and its manufacturing method |
| US7471233B2 (en) | 2004-05-31 | 2008-12-30 | Tdk Corporation | Electromagnetic wave absorber |
| JP2009231451A (en) * | 2008-03-21 | 2009-10-08 | Riken Corp | Radio wave absorber |
| CN114685127A (en) * | 2022-02-24 | 2022-07-01 | 南京航天波平电子科技有限公司 | Preparation method of 25KW power-tolerant wave-absorbing material |
| CN116947380A (en) * | 2023-06-16 | 2023-10-27 | 山东科技大学 | Wave-absorbing material for preventing and controlling time-lapse type rock burst, and preparation method and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908947B (en) * | 2020-08-07 | 2021-09-24 | 河海大学 | Damping bridge support and preparation method thereof |
-
1995
- 1995-06-02 JP JP13669395A patent/JP3394848B2/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6479140B1 (en) | 1997-11-12 | 2002-11-12 | Otsuka Chemical Co., Ltd. | Radio wave absorbing materials, radio wave absorber, and radio wave anechoic chamber and the like made by using the same |
| JP2000072510A (en) * | 1998-08-26 | 2000-03-07 | Taiheiyo Cement Corp | Cement composition |
| JP4549450B2 (en) * | 1998-08-26 | 2010-09-22 | 太平洋セメント株式会社 | Cement composition |
| EP0982801A2 (en) | 1998-08-28 | 2000-03-01 | TDK Corporation | Incombustible honeycomb radio absorptive material and radio absorber using the same |
| US6217978B1 (en) | 1998-08-28 | 2001-04-17 | Tdk Corporation | Incombustible honeycomb radio absorptive material and radio absorber using the same |
| US6613975B1 (en) | 1998-10-05 | 2003-09-02 | Tdk Corporation | Member for assembling radio wave absorber and method of producing radio wave absorber |
| KR100472198B1 (en) * | 1999-01-21 | 2005-03-07 | 티디케이가부시기가이샤 | Radio wave absorbent-assembling member, radio wave absorbent and method for producing the same |
| US6407693B1 (en) | 1999-01-21 | 2002-06-18 | Tdk Corporation | Radio wave absorbent assembling member radio wave absorbent and method for producing the same |
| JPWO2003064780A1 (en) * | 2002-01-31 | 2005-05-26 | 日東紡績株式会社 | Electromagnetic wave absorber |
| JP2004119855A (en) * | 2002-09-27 | 2004-04-15 | Ig Tech Res Inc | Electromagnetic wave absorber |
| WO2004060037A1 (en) * | 2002-12-25 | 2004-07-15 | Toray Industries, Inc. | Sheet material for radio wave-absorbing body and radio wave-absorbing body |
| US7695803B2 (en) | 2002-12-25 | 2010-04-13 | Toray Industries, Inc. | Sheet material for radio wave absorber and radio wave absorber |
| JP2005333125A (en) * | 2004-04-23 | 2005-12-02 | Yokohama Rubber Co Ltd:The | Radio wave absorber and its manufacturing method |
| US7471233B2 (en) | 2004-05-31 | 2008-12-30 | Tdk Corporation | Electromagnetic wave absorber |
| JP2009231451A (en) * | 2008-03-21 | 2009-10-08 | Riken Corp | Radio wave absorber |
| CN114685127A (en) * | 2022-02-24 | 2022-07-01 | 南京航天波平电子科技有限公司 | Preparation method of 25KW power-tolerant wave-absorbing material |
| CN116947380A (en) * | 2023-06-16 | 2023-10-27 | 山东科技大学 | Wave-absorbing material for preventing and controlling time-lapse type rock burst, and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3394848B2 (en) | 2003-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3394848B2 (en) | Radio wave absorber member, radio wave absorber, and method of manufacturing radio wave absorber member | |
| US6245434B1 (en) | Radio wave absorber composition, radio wave absorber member, radio wave absorber, and method for producing radio wave absorber member | |
| CN110177769B (en) | Building material mixture for shielding electromagnetic radiation | |
| EP2132385B1 (en) | Utility materials incorporating a microparticle matrix | |
| KR20000017561A (en) | Incombustible honeycomb radio absorptive material and radio absorber using the same | |
| WO1999013697A1 (en) | Nonflammable radio wave absorber | |
| EP2262960B1 (en) | Wallboard materials incorporating a microparticle matrix | |
| JP4375987B2 (en) | Molded body for radio wave absorber, method for producing the same, and radio wave absorber | |
| CN109279860B (en) | Preparation method of 3D printing electromagnetic protection light high-strength phosphate cement material | |
| JP5291109B2 (en) | Manufacturing method for building boards based on calcium sulfate-barium sulfate | |
| JPH088576A (en) | Composition for wave absorber and manufacture of wave absorber | |
| KR20000022855A (en) | Electric wave absorber | |
| CN115095095A (en) | Inorganic material parcel polyphenyl granule aerogel composite heat preservation sound insulation system | |
| KR101137260B1 (en) | Method for absorbing panel comprising artificial lightweight aggregate with ash | |
| CN114873974A (en) | Anti-crack bonding mortar for autoclaved aerated concrete slab and preparation method thereof | |
| CN110407534B (en) | Sound insulation mortar with core-shell structure and preparation method thereof | |
| JP4736517B2 (en) | Radio wave absorber | |
| JP2001163684A (en) | Sound absorbing body and sound absorbing/sound insulating structure using the sound absorbing body | |
| JP2001220198A (en) | Electromagnetic wave-absorbable fireproof wall material | |
| JPH0766584A (en) | Mortar or concrete lamination type radio wave absorber | |
| JP2002364154A (en) | Nonflammable radio wave absorptive wall material for interior, and method of manufacturing inorganic radio wave absorption plate | |
| JP2000082893A (en) | Radio wave absorbing body | |
| JP2002070205A (en) | Radio wave absorbing panel | |
| JP2001126905A (en) | Thin plate material having electromagnetic wave absorptivity and manufacturing method therefor | |
| JPH0511055B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090131 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090131 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100131 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110131 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110131 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120131 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |