JPH01191500A - Radio-wave absorber - Google Patents
Radio-wave absorberInfo
- Publication number
- JPH01191500A JPH01191500A JP1623188A JP1623188A JPH01191500A JP H01191500 A JPH01191500 A JP H01191500A JP 1623188 A JP1623188 A JP 1623188A JP 1623188 A JP1623188 A JP 1623188A JP H01191500 A JPH01191500 A JP H01191500A
- Authority
- JP
- Japan
- Prior art keywords
- carbon powder
- timber
- laminated
- radio wave
- wood
- 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
- 239000006096 absorbing agent Substances 0.000 title claims description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000002023 wood Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 abstract description 23
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000002648 laminated material Substances 0.000 abstract description 4
- 230000002421 anti-septic effect Effects 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 239000004840 adhesive resin Substances 0.000 description 2
- 229920006223 adhesive resin Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000003855 Adhesive Lamination Methods 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 pillars or boards Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は電波障害を防止する木質系の電波吸収体に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a wood-based radio wave absorber that prevents radio wave interference.
〔この発明が解決しようとする問題点〕従来より一般に
使われている電波吸収体は発泡スチロール樹脂、発泡ウ
レタン樹脂あるいはゴム等の母材にカーボン粉末を付着
せしめたり、ゴム、プラスチック等にフェライトを混入
したものが使われていた。しかし、これら電波吸収体は
母材が可燃性であり、自体の剛性も低いので、電波吸収
体として所望の形状にした場合、その形状保持性が悪い
という欠点があった。[Problems to be solved by this invention] Radio wave absorbers that have been commonly used in the past are made by attaching carbon powder to a base material such as styrofoam resin, foamed urethane resin, or rubber, or by mixing ferrite into rubber or plastic. what was used was used. However, since the base material of these radio wave absorbers is flammable and their rigidity is low, they have the drawback of poor shape retention when formed into a desired shape as a radio wave absorber.
この発明は上記問題点に着目しなされたものである。そ
の目的は木材が本来具備している剛性、強度を有し、同
時に難燃性、防腐性等の性能を付与できる木材を母材と
する電波吸収体を提案するにある。This invention has been made in view of the above-mentioned problems. The purpose is to propose a radio wave absorber using wood as a base material, which has the rigidity and strength inherent to wood, and can also provide properties such as flame retardancy and antiseptic properties.
この電波吸収体は木材に電波吸収に役立つカーボン粉末
あるいはフェライト粉末等が混入してあることを特徴と
する。This radio wave absorber is characterized by having wood mixed with carbon powder, ferrite powder, etc. that are useful for absorbing radio waves.
木材は、柱あるいは板等の未加工材、合板等の積層加工
材、あるいは破砕木片を成形してなった成形加工材等の
様々の形態において使用される。これらの形態の木材の
母材に電波吸収するために必要な伝導率、誘電率、透磁
率等を高めるために、カーボン粉末あるいはフェライト
粉末を混入する。この電波吸収体は周波数３０ＫＨｚ〜
ＩＧＨｚを対象とし、このために、カーボン粉末を木材
重量比４％〜１０％の範囲混入が必要となる。Wood is used in various forms, such as unprocessed materials such as pillars or boards, laminated materials such as plywood, and shaped materials made from crushed wood pieces. Carbon powder or ferrite powder is mixed into the base material of these types of wood in order to increase the conductivity, dielectric constant, magnetic permeability, etc. necessary for absorbing radio waves. This radio wave absorber has a frequency of 30KHz~
The target is IGHz, and for this purpose, it is necessary to mix carbon powder in a range of 4% to 10% by weight of wood.
未加工木材にカーボン粉末を混入するには、微細カーボ
ン粉末の水あるいは溶媒の分散液を木材に注入、あるい
は圧入する０例えば、乾燥処理を施した木材を導管方向
に沿いプレボーリングし、減圧下においてポーリング孔
内に分散液を圧入する。あるいは母材となる木材に導管
方向およびこれに交差する方向にプレボーリングし、排
気減圧後に、カーボン粉末分散液に浸漬し、これを加圧
してカーボン粉末を木材中に圧入する。To mix carbon powder into unprocessed wood, a dispersion of fine carbon powder in water or a solvent is injected or press-fitted into the wood. The dispersion liquid is pressurized into the poling hole. Alternatively, the wood serving as the base material is pre-bored in the direction of the conduit and in the direction crossing this, and after the exhaust pressure is reduced, it is immersed in a carbon powder dispersion liquid, and this is pressurized to force the carbon powder into the wood.
積層加工材の場合は、積層材を構成する薄板に前記のご
とき方法でカーボン粉末を混入し、これを積層してつく
ることができる。また、接着剤にカーボン粉末を混入し
ておき、これを用い接着積層してもよい。In the case of a laminated processed material, carbon powder can be mixed into the thin plates constituting the laminated material by the method described above, and the materials can be laminated. Alternatively, carbon powder may be mixed into the adhesive and used for adhesive lamination.
破砕木片を成形して成形加工材をつくる場合は例えば減
圧状態とした破砕木片をカーボン分散液に浸漬し、これ
を加圧してカーボン粉末を圧入し、これに必要に応じ接
着剤樹脂を噴霧するなどして塗布し、所望形状に加圧成
形する。When making a molded material by molding crushed wood pieces, for example, the crushed wood pieces under reduced pressure are immersed in a carbon dispersion liquid, which is then pressurized to force carbon powder into the mixture, and an adhesive resin is sprayed onto this as necessary. It is then applied and pressure molded into the desired shape.
勿論、接着剤樹脂にカーボン粉末を混入することができ
る。Of course, carbon powder can be mixed into the adhesive resin.
この発明になる電波吸収体は、カーボン粉末あるいはフ
ェライト粉末の混入のほか、母材となる木材に、難燃処
理剤、防腐処理剤を含浸せしめ難燃性あるいは防腐性を
付与してもよい。In addition to mixing carbon powder or ferrite powder, the radio wave absorber according to the present invention may be imparted with flame retardancy or antiseptic properties by impregnating the wood base material with a flame retardant treatment agent or a preservative treatment agent.
これらの薬剤処理はカーボン粉末の混入と同時、あるい
は別プロセスで行なうことができる。また、この電波吸
収体は含浸あるいは塗着した合成樹脂で処理することも
できる。These chemical treatments can be performed simultaneously with the mixing of carbon powder, or in a separate process. Further, this radio wave absorber can also be treated with a synthetic resin impregnated or coated with it.
この電波吸収体は以上の構成からなり、カーボンあるい
はフェライトを混入せしめであるので電波吸収の機能を
もち、かつ木材としての剛性、強度を備えている。This radio wave absorber has the above structure and contains carbon or ferrite, so it has the function of absorbing radio waves and has the rigidity and strength of wood.
木材の繊維は一方向に配向し、その細胞が連なり形成さ
れた導管に沿い、カーボンあるいはフェライトの粉末は
浸入し混入される。従って、この電波吸収体に入射した
電波エネルギーは導管方向に流れ吸収される傾向となる
。このため未加工の木材の場合は、一方向の方向性をも
ち、木材繊維を交差する２方向とした積層加工材の場合
は２方向の方向性をもち、成形加工材の場合は方向性が
ない電波吸収体となる。The wood fibers are oriented in one direction, and the carbon or ferrite powder penetrates and mixes along the conduits formed by the cells. Therefore, the radio wave energy incident on this radio wave absorber tends to flow in the direction of the conduit and be absorbed. Therefore, in the case of unprocessed wood, it has directionality in one direction, in the case of laminated wood, where the wood fibers intersect, it has directionality in two directions, and in the case of molded wood, it has directionality in two directions. It becomes a radio wave absorber.
以下、この電波吸収体の使用例を図示するピラミツ°ド
形吸収体により説明する。Hereinafter, an example of the use of this radio wave absorber will be explained using a pyramid-shaped absorber as illustrated.
第１図は一例を示したもので未加工木材にカーボン粉末
を混入せしめた電波吸収体１を複数層を高さ方向に接着
積層しピラミッド形に成形した吸収体であり、電波吸収
体１の層は交互に導管方向を９０″シフトし、側面には
木口２と板目３が交互にあられれ、基端部にフェライト
粉末を混入せしめた板状の電波吸収体４および金属板５
を接着積層してなっている。Figure 1 shows an example, which is an absorber made of a radio wave absorber 1 made of unprocessed wood mixed with carbon powder, which is formed into a pyramid shape by laminating multiple layers of the radio wave absorber 1 with adhesive in the height direction. The layers alternately shift the conduit direction by 90'', have butt ends 2 and grains 3 alternately on the side surfaces, and have a plate-shaped radio wave absorber 4 and a metal plate 5 mixed with ferrite powder at the base end.
are laminated with adhesive.
このピラミッド形吸収体は基端部の金属板５面を建築物
の外壁面に接し取付け、周囲から入射する垂直並びに斜
入射電波を導管方向に流し吸収できる。This pyramid-shaped absorber is attached with five metal plates at its base in contact with the outer wall surface of a building, and can absorb vertical and obliquely incident radio waves incident from the surroundings in the direction of the conduit.
第２図は導管方向が直交する２層を積層した合板を母材
としカーボン粉末を混入せしめた電波吸収体６を複数層
積方向に接着積層しピラミッド形に成形した吸収体であ
り、側面には木口２、板目３が交互にあられれ、基端部
には板状の電波吸収体４および金属板５が接着積層しで
ある。Figure 2 shows an absorber in which a plurality of radio wave absorbers 6 made of plywood laminated with two layers with the conduit directions perpendicular to each other and carbon powder mixed therein are laminated in the stacking direction and formed into a pyramid shape. The butt ends 2 and the grains 3 are arranged alternately, and a plate-shaped radio wave absorber 4 and a metal plate 5 are laminated with adhesive at the base end.
第３図は破砕木片を加圧成形した成形加工材を母材とし
カーボン粉末を混入せしめた電波吸収体７を複数層高さ
方向に接着積層しピラミッド形に成形した吸収体であり
、側面には木口２、板目３が不規則にあられれ、基端部
には板状の電波吸収体４および金属板５が接着積層しで
ある。Figure 3 shows an absorber formed into a pyramid shape by laminating multiple layers of radio wave absorbers 7 in the height direction by adhesively stacking them in the height direction and using a molded material obtained by press-molding crushed wood chips as a base material and mixing carbon powder. The wood grain 2 and the grain 3 are irregularly arranged, and a plate-shaped radio wave absorber 4 and a metal plate 5 are laminated with adhesive at the base end.
第２．３図のピラミッド形吸収体はいずれも周囲から入
射する電波を吸収することができる。Both of the pyramid-shaped absorbers shown in FIG. 2.3 can absorb radio waves incident from the surroundings.
この発明は以上の構成からなる。この電波吸収体は電波
吸収機能と共に木材の剛性、強度を備えているので、建
築物外壁等に取付け、長期の使用に耐え機能を維持する
。また、この電波吸収体は導管方向に沿い電波吸収の方
向性があるので、電波入射力１向に適する方向に配向し
て配置し電波吸収の高能率化を図ることができる。This invention consists of the above configuration. This radio wave absorber has the radio wave absorption function as well as the rigidity and strength of wood, so it can be installed on the outer wall of a building, etc., and can withstand long-term use and maintain its functionality. Further, since this radio wave absorber has a directionality of radio wave absorption along the conduit direction, it is possible to increase the efficiency of radio wave absorption by oriented and disposed in a direction suitable for one direction of radio wave incident power.
第１．２．３図はそれぞれ未加工木材、積層加工材、お
よび成形加工材を母材とする電波吸収体を用い形成した
ピラミッド形吸収体の斜視図である。
１・・・・・・未加工木材を母材とする電波吸収体、２
・・・・・・木口、３・・・・・・板目、４・・・・・
・フェライトを混入した電波吸収体、５・・・・・・金
属板、６・・・積層加工材を母材とした電波吸収体、７
・・・・・・成形加工材を母材とした電波吸収体。Figures 1, 2, and 3 are perspective views of pyramid-shaped absorbers formed using radio wave absorbers whose base materials are unprocessed wood, laminated wood, and molded wood, respectively. 1... Radio wave absorber whose base material is unprocessed wood, 2
...Kiguchi, 3... Grain, 4...
・Radio wave absorber mixed with ferrite, 5...Metal plate, 6...Radio wave absorber using laminated processed material as base material, 7
・・・・・・Radio wave absorber whose base material is molded material.
Claims (1)
入してあることを特徴とする電波吸収体。(1) A radio wave absorber characterized by mixing carbon powder or ferrite powder into wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1623188A JPH01191500A (en) | 1988-01-27 | 1988-01-27 | Radio-wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1623188A JPH01191500A (en) | 1988-01-27 | 1988-01-27 | Radio-wave absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01191500A true JPH01191500A (en) | 1989-08-01 |
| JPH0328080B2 JPH0328080B2 (en) | 1991-04-17 |
Family
ID=11910777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1623188A Granted JPH01191500A (en) | 1988-01-27 | 1988-01-27 | Radio-wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01191500A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151699A (en) * | 1989-11-08 | 1991-06-27 | Kajima Corp | Radio wave absorbing material |
| JPH03151698A (en) * | 1989-11-08 | 1991-06-27 | Kajima Corp | Radio wave absorbing material |
| WO2005105398A1 (en) * | 2004-04-30 | 2005-11-10 | Japan Science And Technology Agency | Woody magnetic radio wave absorption board for indoor use |
| JP2008069613A (en) * | 2006-09-16 | 2008-03-27 | Wood One:Kk | Radiowave absorbing wooden board and its manufacturing method |
| US7544427B2 (en) | 2004-01-19 | 2009-06-09 | Incorporated National University Iwate University | Woody electric-wave-absorbing building material |
| JP2011187671A (en) * | 2010-03-08 | 2011-09-22 | Joto Techno Co Ltd | Multilayer woody radio wave absorbing board material and manufacturing method thereof |
| CN109713456A (en) * | 2017-10-24 | 2019-05-03 | 蔡钧 | A kind of millimeter wave background absorption device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61293804A (en) * | 1985-06-21 | 1986-12-24 | Iwakuragumi Mokuzai Kk | Manufacture of particle board for shielding electromagnetic wave |
| JPS624197U (en) * | 1985-06-21 | 1987-01-12 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132684A (en) * | 1979-04-02 | 1980-10-15 | Hitachi Plant Eng & Constr Co Ltd | Magnetic treatment of waste water |
-
1988
- 1988-01-27 JP JP1623188A patent/JPH01191500A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61293804A (en) * | 1985-06-21 | 1986-12-24 | Iwakuragumi Mokuzai Kk | Manufacture of particle board for shielding electromagnetic wave |
| JPS624197U (en) * | 1985-06-21 | 1987-01-12 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151699A (en) * | 1989-11-08 | 1991-06-27 | Kajima Corp | Radio wave absorbing material |
| JPH03151698A (en) * | 1989-11-08 | 1991-06-27 | Kajima Corp | Radio wave absorbing material |
| US7544427B2 (en) | 2004-01-19 | 2009-06-09 | Incorporated National University Iwate University | Woody electric-wave-absorbing building material |
| WO2005105398A1 (en) * | 2004-04-30 | 2005-11-10 | Japan Science And Technology Agency | Woody magnetic radio wave absorption board for indoor use |
| JP2008069613A (en) * | 2006-09-16 | 2008-03-27 | Wood One:Kk | Radiowave absorbing wooden board and its manufacturing method |
| JP2011187671A (en) * | 2010-03-08 | 2011-09-22 | Joto Techno Co Ltd | Multilayer woody radio wave absorbing board material and manufacturing method thereof |
| CN109713456A (en) * | 2017-10-24 | 2019-05-03 | 蔡钧 | A kind of millimeter wave background absorption device |
| CN109713456B (en) * | 2017-10-24 | 2021-03-23 | 蔡钧 | Millimeter wave background absorption device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0328080B2 (en) | 1991-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5220622B2 (en) | Multilayer foam composite with voids | |
| JPH01191500A (en) | Radio-wave absorber | |
| CN106182940B (en) | A kind of sound absorption loading plate based on honeycomb sandwich structure | |
| US3234549A (en) | Absorber for radio waves | |
| KR101152155B1 (en) | Eco friendly mineral board containing ocher and manufacturing method there of | |
| KR20100020076A (en) | Interior/exterior panel for building contruction use and fabrication method thereof | |
| CN105599392A (en) | Plywood with electromagnetic compatibility and manufacturing method thereof | |
| CN206711599U (en) | A kind of cycle born of the same parents structure composite sound panel | |
| US7544427B2 (en) | Woody electric-wave-absorbing building material | |
| JPH0152920B2 (en) | ||
| CN210477991U (en) | Double-honeycomb cell structure composite board for sound insulation | |
| KR20170101326A (en) | Sandwitch panel and manufacturing method thereof | |
| KR20020085025A (en) | Composite and Mat Utilizing Thereof for Acoustic Insulation with Absorption Function of Electromagnetic Wave and Water-Vein Wave | |
| CN207194204U (en) | A kind of fire-proof glass fiber and magnesia plate | |
| JP2008069613A (en) | Radiowave absorbing wooden board and its manufacturing method | |
| CN206201122U (en) | A kind of environment-friendly active charcoal anti-noise circuit board | |
| JP2016146374A (en) | Electromagnetic wave absorber | |
| JPH03267437A (en) | Radio-wave absorber for structure | |
| CA1184014A (en) | Elongated structural members comprised of composite wood material | |
| JPS6213786Y2 (en) | ||
| JPS6217237Y2 (en) | ||
| JPH0212995A (en) | Radio wave absorber | |
| CN115246258A (en) | Electromagnetic wave absorption wood-based artificial board and preparation method thereof | |
| JP2000202815A (en) | Production of moisture-adjustable building material by paper making method and moisture-adjustable building material | |
| CA1185413A (en) | Elongate structural members comprised of composite wood material |