JP2002094284A - Electromagnetic wave absorption resin composition, and electromagnetic wave absorption building material - Google Patents
Electromagnetic wave absorption resin composition, and electromagnetic wave absorption building materialInfo
- Publication number
- JP2002094284A JP2002094284A JP2000276382A JP2000276382A JP2002094284A JP 2002094284 A JP2002094284 A JP 2002094284A JP 2000276382 A JP2000276382 A JP 2000276382A JP 2000276382 A JP2000276382 A JP 2000276382A JP 2002094284 A JP2002094284 A JP 2002094284A
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- Prior art keywords
- electromagnetic wave
- resin composition
- electromagnetic
- wave
- building material
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、１〜２０ＧＨｚ帯
域の電磁波吸収特性を有する木炭−樹脂結合材系、木炭
−樹脂結合材−Ｍ（但し、Ｍは絶縁性磁性体又は強誘電
体。）系の電磁波吸収性樹脂組成物及び電磁波吸収性建
材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charcoal-resin binder system and a charcoal-resin binder-M having electromagnetic wave absorption characteristics in a band of 1 to 20 GHz (where M is an insulating magnetic material or a ferroelectric material). The present invention relates to a system-based electromagnetic wave absorbing resin composition and an electromagnetic wave absorbing building material.
【０００２】[0002]
【従来の技術】無線通信を用いた情報関連技術の急激な
発達により、１〜１０ＧＨｚのマイクロ波帯が室内無線
ＬＡＮ通信用の電磁波として多用されることが予測さ
れ、電磁波障害に備えた電磁波吸収材、なかでも電磁波
吸収性建材へのニーズが生まれつつある。2. Description of the Related Art With the rapid development of information-related technology using wireless communication, it is expected that a microwave band of 1 to 10 GHz will be frequently used as an electromagnetic wave for indoor wireless LAN communication. There is a growing need for materials, especially electromagnetic wave absorbing building materials.
【０００３】こうした要求に応える電磁波吸収材として
今日フェライト系、カルボニル鉄系の磁性損失型電磁波
吸収素材、炭化珪素系あるいはカーボンブラック、グラ
ファイト系誘電損失型電磁波吸収素材を、それ自体で焼
結したものあるいは無機・有機結合材で複合したものな
どが開発されている。As an electromagnetic wave absorbing material meeting these requirements, ferrite-based and carbonyl iron-based magnetic loss type electromagnetic wave absorbing materials, silicon carbide or carbon black, and graphite based dielectric loss type electromagnetic wave absorbing materials are sintered by themselves. Alternatively, a composite made of an inorganic / organic binder has been developed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、焼結体
は重くかつ硬く施工場所に合わせて自由な寸法に切断あ
るいは加工することが困難であり、他方有機結合材で複
合したものは、樹脂発泡体にしてもゴム系にしてもそれ
自体の材料強度が劣り、建材として壁面を構成するには
不適当であった。また、塗料型の吸収材はその薄さか
ら、いわゆるλ／４型の２重壁構造にしない限り、１〜
１０ＧＨｚのマイクロ波帯を吸収することは困難であっ
た。However, the sintered body is heavy and hard, and it is difficult to cut or process the sintered body to a free size according to a construction place. Even if it is a rubber material, its material strength is inferior, and it is unsuitable for constructing a wall surface as a building material. In addition, the paint-type absorber has a thickness of 1 to 4 unless it has a so-called λ / 4 type double wall structure due to its thinness.
It was difficult to absorb the 10 GHz microwave band.
【０００５】特に、フェライト系電磁波吸収材は従来２
ＧＨｚ以上の周波数帯域を吸収するのは困難であり、ま
たカーボンブラックなどの誘電損失型電磁波吸収材は、
電気抵抗率が低く、ゴム系結合材を除いては反射率を上
げないための調整が困難でありかつ比誘電率実部が比較
的低いところで虚部が立ち上がるため薄型化が困難であ
った。In particular, ferrite-based electromagnetic wave absorbers have been
It is difficult to absorb the frequency band above GHz, and dielectric loss type electromagnetic wave absorbing materials such as carbon black,
The electric resistivity is low, it is difficult to adjust the reflectance without increasing the rubber-based binder, and the imaginary part rises when the real part of the relative permittivity is relatively low, so that it is difficult to reduce the thickness.
【０００６】本発明はこのような事情に鑑みなされたも
のであって、上記課題を解消し、１〜２０ＧＨｚ帯域の
電磁波吸収特性を有する木炭−樹脂結合材系、木炭−樹
脂結合材−Ｍ（但し、Ｍは絶縁性磁性体又は強誘電
体。）系の電磁波吸収性樹脂組成物及び電磁波吸収性建
材を提供するものである。The present invention has been made in view of such circumstances, and solves the above-mentioned problems and has a charcoal-resin binder material, a charcoal-resin binder material-M (M) having electromagnetic wave absorption characteristics in a 1 to 20 GHz band. Here, M is an insulating magnetic material or a ferroelectric material.) The present invention provides an electromagnetic wave absorbing resin composition and an electromagnetic wave absorbing building material.
【０００７】[0007]
【課題を解決するための手段】課題を解決するために本
発明は、第１に電磁波吸収性樹脂組成物であって、木炭
粉又は竹炭粉が１〜４０重量部、残部が樹脂結合材とし
ての無溶剤型高分子樹脂塗料、無溶剤型接着剤、又は熱
可塑性樹脂からなることを特徴とするものである。ここ
で、無溶剤型高分子樹脂塗料については触媒ないしは重
合開始剤を含み、無溶剤型接着剤については硬化剤を含
むものとして取り扱う。Means for Solving the Problems In order to solve the problems, the present invention firstly provides an electromagnetic wave absorbing resin composition, wherein charcoal powder or bamboo charcoal powder is 1 to 40 parts by weight, and the remainder is a resin binder. Or a solvent-free polymer resin paint, a solvent-free adhesive, or a thermoplastic resin. Here, the solventless polymer resin paint is treated as including a catalyst or a polymerization initiator, and the solventless adhesive is treated as including a curing agent.
【０００８】第２に電磁波吸収性建材であって、電磁波
吸収性樹脂組成物を板状成形又は賦型化してなることを
特徴とするものである。[0008] Second, an electromagnetic wave absorbing building material is characterized in that the electromagnetic wave absorbing resin composition is formed into a plate shape or shaped.
【０００９】また、電磁波吸収性建材を構成する基材表
面に電磁波吸収性樹脂組成物を成膜又は被覆形成してな
ることを特徴とするものである。The present invention is also characterized in that the electromagnetic wave absorbing resin composition is formed on the surface of the base material constituting the electromagnetic wave absorbing building material by film formation or coating.
【００１０】[0010]
【発明の実施の形態】本発明の実施の形態は、上記構成
の電磁波吸収性樹脂組成物又は電磁波吸収性建材におい
て、６５０℃から９００℃の範囲の炭化温度で焼成およ
び／または再焼成した木炭又は竹炭を粉砕し、一次粒子
径１〜３００μｍのものを選び、重量配合比にして１〜
４０％（以下、重量部。）、より望ましくは５〜３０重
量部を無溶剤型高分子樹脂塗料、無溶剤型接着剤または
熱可塑性プラスチックスに配合・硬化させることによ
り、電磁波吸収性樹脂組成物を調製する。獲得材料は１
〜２０ＧＨｚ帯域での電磁波吸収特性を具備する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention relates to an electromagnetic wave-absorbing resin composition or an electromagnetic wave-absorbing building material having the above-mentioned structure, and charcoal fired and / or refired at a carbonization temperature in the range of 650 to 900 ° C. Or bamboo charcoal is pulverized, and a primary particle diameter of 1 to 300 μm is selected, and the weight ratio is 1 to
An electromagnetic wave absorbing resin composition is prepared by blending and curing 40% (hereinafter referred to as "parts by weight"), more preferably 5 to 30 parts by weight, of a solventless polymer resin paint, a solventless adhesive or a thermoplastic. Prepare the product. Acquisition material is 1
It has electromagnetic wave absorption characteristics in a band of about 20 GHz.
【００１１】そして、建材への適用に関し、この樹脂組
成物を板状成形又は賦型化したり、基材表面に塗布する
ことにより成膜又は被覆形成して、加工性に優れ、かつ
それ自体で壁面等を形成するに足る材料強度を有した電
磁波吸収性建材を作製する。しかも、カーボンブラッ
ク、グラファイト系に比べより薄型となし得る。[0011] With respect to application to building materials, the resin composition is formed into a plate or molded, or is applied to the surface of a base material to form a film or a coating, thereby providing excellent workability and itself. An electromagnetic wave absorbing building material having sufficient material strength to form a wall surface or the like is manufactured. In addition, it can be made thinner than carbon black and graphite.
【００１２】ここで、炭化木材原料としては、樹種・形
態を問わない。従来から燃料として使用されている炭で
も良いし、近年利用が増えつつある調湿用木炭でも良い
し、廃材やおがくずを炭化したものでもまた竹炭であっ
ても良い。一般に、木材は常温から４００℃炭化領域に
おいて絶縁体であり、４００℃から８００℃炭化領域に
おいて半導体であり、８００℃以上での炭化領域におい
て導体になると言われている。The carbonized wood raw material is not limited to species and forms. Charcoal that has been used as a fuel in the past, charcoal for humidity control that has been increasingly used in recent years, or charcoalized waste material or sawdust or bamboo charcoal may be used. In general, it is said that wood is an insulator in a carbonization region from room temperature to 400 ° C., a semiconductor in a carbonization region from 400 ° C. to 800 ° C., and a conductor in a carbonization region above 800 ° C.
【００１３】炭素材料が導電損失型あるいは誘電損失型
の電磁波吸収材料であることは良く知られているが、特
に誘電損失型電磁波吸収材料となりうるためには、空気
に近い抵抗率あるいはインピーダンス（３７７Ω）とな
るよう調製することが求められる。木炭−樹脂結合材系
の場合、木炭の炭化温度とその配合比によりインピーダ
ンスの制御（調整）が可能である。It is well known that the carbon material is a conductive loss type or dielectric loss type electromagnetic wave absorbing material. In particular, in order to be a dielectric loss type electromagnetic wave absorbing material, the resistivity or impedance (377Ω) close to that of air is required. ) Is required. In the case of the charcoal-resin binder system, the impedance can be controlled (adjusted) by the charcoal temperature of the charcoal and the compounding ratio thereof.
【００１４】絶縁体に属する高分子樹脂系の結合材に配
合する木炭の炭化温度（以後焼成温度と呼ぶ）および配
合比を種々変えて試作評価した結果、実用的に価値のあ
るマイクロ波吸収性能を示すのは、６５０℃から９００
℃の範囲の温度で焼成した木炭を、高分子樹脂系結合材
に対して重量比で５〜３０重量部配合したものに限られ
ることが分かった。As a result of trial production and evaluation of various charcoal temperatures (hereinafter referred to as firing temperatures) and compounding ratios of the charcoal compounded in the polymer resin binder belonging to the insulator, the microwave absorption performance which is practically valuable was obtained. Between 650 ° C and 900 ° C
It has been found that charcoal calcined at a temperature in the range of 5 ° C. is limited to a mixture of 5 to 30 parts by weight in weight ratio with respect to the polymer resin binder.
【００１５】６５０℃以下の温度で焼成した木炭を５重
量部以下配合しても数ｄＢの吸収は示すが、ほとんど透
過して実用的吸収材にはならない。また、９００℃以上
の温度で焼成した木炭を２５重量部以上配合しても数ｄ
Ｂの吸収はあってもほとんど反射してやはり実用的吸収
材にはならない。さらに、３０重量部以上配合すると、
粘度が高くなり過ぎて、均一性のある成形が困難とな
る。When charcoal calcined at a temperature of 650 ° C. or less is blended in an amount of 5 parts by weight or less, it absorbs several dB, but hardly penetrates into a practical absorbent. Even if charcoal fired at a temperature of 900 ° C. or more is blended in an amount of 25 parts by weight or more, several d
Even if B is absorbed, it is hardly reflected and becomes a practical absorbing material. Furthermore, when 30 parts by weight or more are mixed,
The viscosity is so high that uniform molding is difficult.
【００１６】特に、粒径１μｍ〜３００μｍ範囲の木炭
（粉）は、カーボンブラックに比べて結合材に対する分
散が容易で、ディスパー混合だけでも分散できる長所を
持っている。粒径１μｍを下回ると、粉末の凝集性が増
して高分子樹脂結合材に均一に分散することが困難とな
り、また、高分子樹脂結合材に対して同じ配合比でも粘
度が著しく高くなり高濃度配合が困難になるという問題
を招く。In particular, charcoal (powder) having a particle size of 1 μm to 300 μm has an advantage that it can be easily dispersed in a binder as compared with carbon black and can be dispersed only by mixing with a disper. If the particle size is less than 1 μm, the cohesiveness of the powder increases and it becomes difficult to uniformly disperse the powder in the polymer resin binder. This causes a problem that the compounding becomes difficult.
【００１７】逆に粒径が３００μｍを越えると、成形後
表面の平滑性を失うと同時に高濃度配合における剛性が
低下し、建材としての適性が損われる。Conversely, if the particle size exceeds 300 μm, the surface loses smoothness after molding, and at the same time, the rigidity in a high-concentration compound decreases, and the suitability as a building material is impaired.
【００１８】樹脂結合材としては、無溶剤で分散混合が
可能な粘度領域が安定して得られかつ硬化状態において
絶縁性を示すものであれば良く、空気乾燥型およびワッ
クス型不飽和ポリエステル樹脂、ビニルエステル樹脂、
エポキシ樹脂、フェノール樹脂などの常温で液状であり
木炭粉分散混合後、硬化剤混合あるいは加熱によって硬
化可能な塗料系または接着剤系の高分子、あるいはポリ
エチレン樹脂、ポリプロピレン樹脂、アクリル樹脂、Ａ
ＢＳ樹脂、ナイロン樹脂、ＰＥＴ樹脂、塩化ビニル樹
脂、フッ素樹脂などの昇温状態において安定した低粘度
状態が得られる熱可塑性樹脂系の高分子のいずれを用い
ても良い。As the resin binder, any binder can be used as long as it can stably obtain a viscosity range in which dispersing and mixing can be performed without a solvent and exhibit insulating properties in a cured state. Vinyl ester resin,
Epoxy resin, phenolic resin, etc., which are liquid at room temperature and dispersed and mixed with charcoal powder, and can be cured by mixing or heating with a curing agent or a coating or adhesive polymer, or polyethylene resin, polypropylene resin, acrylic resin, A
Any of thermoplastic resin-based polymers such as BS resin, nylon resin, PET resin, vinyl chloride resin, and fluororesin that can obtain a stable low-viscosity state at elevated temperatures may be used.
【００１９】また、電磁波を有効に吸収するためには、
電磁波吸収材を対象周波数に合わせて厚み調整する必要
があるが、所定の厚さに成形する方法としては、プール
状に作った型に流し込んで成形しても良く、鋳型に流し
込んで成形しても良い。特に、熱可塑性プラスチックス
を結合材に用いた場合は、圧延ロールで徐々に冷却成形
しても良く、塗料系樹脂を結合材に用いた場合は、数回
に分けて繰り返し塗布することによって所定の厚みを形
成するなどしても良い。In order to effectively absorb electromagnetic waves,
It is necessary to adjust the thickness of the electromagnetic wave absorbing material according to the target frequency, but as a method of molding to a predetermined thickness, it may be poured into a pool-shaped mold and molded, or poured into a mold and molded Is also good. In particular, when thermoplastics is used as the binder, the material may be gradually cooled and formed by a rolling roll. May be formed.
【００２０】また、木炭−樹脂結合材系電磁波吸収性材
料（樹脂組成物）に、第三の成分としてチタン酸バリウ
ム、チタン酸ストロンチウムなどの強誘電体物質、ある
いはフェライトなどの絶縁性磁性金属粉を混合すること
によって、異なった波長での吸収が可能となる。The charcoal-resin binder-based electromagnetic wave absorbing material (resin composition) may include, as a third component, a ferroelectric substance such as barium titanate or strontium titanate, or an insulating magnetic metal powder such as ferrite. Can be absorbed at different wavelengths.
【００２１】また、本発明建材は、美観あるいは結露防
止・難燃化などの付加的機能を持たせるため、板状に成
形した後、化粧紙、化粧合板、ビニル系壁紙などを積層
して用いることも可能である。Further, the building material of the present invention is formed into a plate shape and then laminated with decorative paper, decorative plywood, vinyl-based wallpaper, etc. in order to impart an additional function such as aesthetics or prevention of dew condensation and flame retardancy. It is also possible.
【００２２】[0022]
【実施例】以下、本発明の一実施例について詳細説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail.
【００２３】〔実施例１〕６００℃炭化アカマツ炭を磁
製ボールミルで４時間かけて粉砕し、１０５μｍ間隔の
ふるいを透過したものを蓋付きルツボに入れて電気炉に
入れ７５０℃に４時間保って７５０℃再焼成木炭粉を調
製した。[Example 1] Carbonized red pine charcoal at 600 ° C was pulverized with a porcelain ball mill for 4 hours, and what passed through a sieve at intervals of 105 µm was placed in a crucible with a lid, placed in an electric furnace, and kept at 750 ° C for 4 hours. To prepare 750 ° C. refired charcoal powder.
【００２４】７５０℃再焼成木炭粉２０重量部を、触媒
であるナフテン酸コバルトを含んだワックスタイプ不飽
和ポリエステル樹脂、例えばサンユーペイント株式会社
製「ポリパロットＰＨ−６２５」８０重量部に混合し、
ディスパーで１０分間攪拌する。これを、３０分以上静
置して脱泡せしめた後、重合開始剤パーメックを温度に
応じて１〜２重量部加え、型に流し込んで成形硬化さ
せ、厚さ５ｍｍの板状電磁波吸収材を得た。この時、型
としてアルミ箔を密着せしめた磨き板ガラス２枚を厚さ
５ｍｍのスペーサを介して対向させたものを用いた。20 parts by weight of 750 ° C. refired charcoal powder are mixed with 80 parts by weight of a wax type unsaturated polyester resin containing cobalt naphthenate as a catalyst, for example, “Polyparrot PH-625” manufactured by Sanyu Paint Co., Ltd.
Stir for 10 minutes with a disper. After leaving it for 30 minutes or more to remove bubbles, 1 to 2 parts by weight of polymerization initiator Permec is added according to the temperature, poured into a mold and molded and cured, and a plate-shaped electromagnetic wave absorbing material having a thickness of 5 mm is obtained. Obtained. At this time, a mold was used in which two polished plate glasses each having an aluminum foil adhered thereto were opposed to each other via a spacer having a thickness of 5 mm.
【００２５】〔実施例２〕実施例１と同様にして調製し
た７５０℃再焼成木炭粉２０重量部を、株式会社スリー
ボンド製エポキシ樹脂接着剤本剤「２０２３」５３重量
部中に分散し、次いで同接着剤硬化剤「２１０６」２７
重量部を加えて混合し、実施例１と同様にして厚さ５ｍ
ｍの板状電磁波吸収材を得た。Example 2 20 parts by weight of the 750 ° C. refired charcoal powder prepared in the same manner as in Example 1 were dispersed in 53 parts by weight of an epoxy resin adhesive “2023” manufactured by Three Bond Co., Ltd. The adhesive curing agent “2106” 27
5 parts by weight as in Example 1
m plate-like electromagnetic wave absorbing material was obtained.
【００２６】〔実施例３〕実施例１と同様にして調製し
た７５０℃再焼成木炭粉１０重量部およびスピネル型ニ
ッケル・亜鉛複合フェライト、例えば戸田工業株式会社
製「Ｇ−４０９」３０部を「ポリパロットＰＨ−６２
５」６０重量部に混合し、実施例１と同様にして板状電
磁波吸収材を得た。Example 3 10 parts by weight of 750 ° C. refired charcoal powder and spinel type nickel-zinc composite ferrite prepared in the same manner as in Example 1, for example, 30 parts of “G-409” manufactured by Toda Kogyo Co., Ltd. Polyparrot PH-62
5 "and mixed with 60 parts by weight to obtain a plate-like electromagnetic wave absorbing material in the same manner as in Example 1.
【００２７】〔実施例４〕実施例１と同様にして調製し
た７５０℃再焼成木炭粉２０重量部を、０．８重量部の
ナフテン酸コバルトを含んだワックスタイプ不飽和ポリ
エステル樹脂、例えばサンユーペイント株式会社製「ポ
リパロットＰＨ−６２５」８０重量部に混合し、ディス
パーで１０分間攪拌する。これを予めウレタン樹脂塗料
で下塗りを施した厚さ２４ｍｍの合板に、形成膜厚が約
２００μｍになるよう塗布、硬化させた。Example 4 20 parts by weight of 750 ° C. refired charcoal powder prepared in the same manner as in Example 1 were mixed with a wax type unsaturated polyester resin containing 0.8 parts by weight of cobalt naphthenate, such as Sanyu Paint It is mixed with 80 parts by weight of "Polyparotto PH-625" manufactured by Co., Ltd. and stirred with a disper for 10 minutes. This was applied and cured on a 24 mm-thick plywood which had been previously coated with a urethane resin paint so that the formed film thickness was about 200 μm.
【００２８】上記各実施例により作製した板状電磁波吸
収材について、当て板として厚さ１ｍｍのアルミ板を置
いて自由空間法で斜入射電磁波の反射特性を測定した結
果、および両端支持中央集中荷重方式による曲げ強度測
定結果を、表１に示す。With respect to the plate-like electromagnetic wave absorbing material produced in each of the above-mentioned embodiments, the reflection characteristic of obliquely incident electromagnetic waves was measured by a free space method with an aluminum plate having a thickness of 1 mm as a backing plate, Table 1 shows the bending strength measurement results by the method.
【００２９】[0029]
【表１】 [Table 1]
【００３０】第１表に示すように、６５０℃から９００
℃の範囲の温度で焼成した木炭粉を、樹脂結合材に１重
量部以上を配合、硬化させることにより、あるいはこれ
にさらに絶縁性磁性材料および／または強誘電体物質を
複合配合させることによって得られた板状樹脂組成物
が、１〜２０ＧＨｚ帯において、十分な電磁波吸収性能
を持ち、かつ建材として用いるに足る材料強度を持って
いることが分かる。As shown in Table 1, from 650 ° C. to 900
A charcoal powder fired at a temperature in the range of ° C. is obtained by mixing and curing at least 1 part by weight of a resin binder, or by further compounding with an insulating magnetic material and / or a ferroelectric substance. It can be seen that the obtained plate-shaped resin composition has sufficient electromagnetic wave absorption performance in the band of 1 to 20 GHz and has sufficient material strength to be used as a building material.
【００３１】[0031]
【発明の効果】本発明は以上の構成よりなるものであ
り、これによれば１〜２０ＧＨｚ帯域における十分な電
磁波吸収性能を持ち、かつ建材として使用可能な材料強
度を有する電磁波吸収性樹脂組成物を得ることができ
る。According to the present invention, there is provided an electromagnetic wave absorbing resin composition having a sufficient electromagnetic wave absorbing performance in a band of 1 to 20 GHz and a material strength usable as a building material. Can be obtained.
【００３２】とくに、内装建材（壁面用建材）への適用
に関し、この樹脂組成物を板状成形又は賦型化したり、
基材表面に塗布することにより成膜又は被覆形成して、
加工性に優れ、かつそれ自体で壁面等を形成するに足る
材料強度を有し、しかもカーボンブラック、グラファイ
ト系に比べより薄型とした電磁波吸収性建材を作製可能
である。In particular, with respect to application to interior building materials (building materials for wall surfaces), this resin composition is formed into a plate shape or shaped,
By forming a film or coating by applying to the substrate surface,
It is possible to produce an electromagnetic-wave-absorbing building material which is excellent in processability, has sufficient material strength to form a wall or the like by itself, and is thinner than carbon black or graphite.
【００３３】また、木質廃材へのリユースや健康に関す
る生活環境改善という観点からすると、木炭製造業や建
材製造業における産業振興策の一助となるものであり、
二次的な効果として二酸化炭素排出量の低減にも寄与す
る。Further, from the viewpoint of reuse of wood waste and improvement of the living environment related to health, it is an aid to industrial promotion measures in the charcoal manufacturing industry and the building material manufacturing industry.
As a secondary effect, it also contributes to a reduction in carbon dioxide emissions.
【００３４】全体として、エコ技術といえるものであ
り、産業上の利用価値が高く、社会的貢献に資するもの
である。As a whole, it can be said that the technology is eco-friendly, has high industrial use value, and contributes to social contribution.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塚脇 聡 広島県福山市引野町３丁目17−43 職員寮 １−105 Ｆターム(参考） 2E001 DH01 GA03 GA06 HC02 HC05 HC07 HD11 JB00 JC09 JD02 5E321 BB32 BB51 BB60 GG11 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Tsukawaki 3-17-43 Hikino-cho, Fukuyama-shi, Hiroshima Staff dormitory 1-105 F-term (reference) 2E001 DH01 GA03 GA06 HC02 HC05 HC07 HD11 JB00 JC09 JD02 5E321 BB32 BB51 BB60 GG11
Claims (6)
剤、又は熱可塑性樹脂からなる樹脂結合材に対して、木
炭粉又は竹炭粉１〜４０重量部を内分配合し、硬化させ
てなることを特徴とする電磁波吸収性樹脂組成物。1. A mixture of charcoal powder or bamboo charcoal powder in an amount of 1 to 40 parts by weight with a resin binder made of a solventless polymer resin paint, a solventless adhesive, or a thermoplastic resin, and cured. An electromagnetic wave absorbing resin composition characterized by comprising:
００μｍの破砕炭であって、６５０〜９００℃の炭化温
度範囲で焼成又は再焼成されたものである請求項１記載
の電磁波吸収性樹脂組成物。2. Charcoal powder or bamboo charcoal powder having a primary particle size of 1 to 3.
The electromagnetic-wave-absorbing resin composition according to claim 1, which is a crushed coal having a size of 00 µm, which is fired or refired in a carbonization temperature range of 650 to 900 ° C.
組成物１００重量部に対して、絶縁性磁性体および／ま
たは強誘電体として用いられる材料又は物質の粉体１〜
５０重量部を内分配合し、かつ、その特性インピーダン
スが自由空間波動インピーダンス（３７７Ω）に近似す
るよう調製してなること特徴とする電磁波吸収性樹脂組
成物。3. A powder of a material or a substance used as an insulating magnetic substance and / or a ferroelectric substance with respect to 100 parts by weight of the electromagnetic wave absorbing resin composition according to claim 1 or 2.
An electromagnetic wave-absorbing resin composition characterized in that 50 parts by weight are internally blended and its characteristic impedance is adjusted so as to approximate free space wave impedance (377Ω).
鉛複合フェライトであり、強誘電体がチタン酸バリウム
および／またはチタン酸ストロンチウムである請求項３
記載の電磁波吸収性樹脂組成物。4. The insulating magnetic material is a spinel type nickel-zinc composite ferrite, and the ferroelectric is barium titanate and / or strontium titanate.
The electromagnetic wave absorbing resin composition according to the above.
磁波吸収性樹脂組成物を板状成形又は賦型化してなるこ
とを特徴とする電磁波吸収性建材。5. An electromagnetic-wave-absorbing building material obtained by molding or shaping the electromagnetic-wave-absorbing resin composition according to any one of claims 1 to 4.
磁波吸収性樹脂組成物を基材表面に成膜又は被覆形成し
てなることを特徴とする電磁波吸収性建材。6. An electromagnetic-wave-absorbing building material, wherein the electromagnetic-wave-absorbing resin composition according to any one of claims 1 to 4 is formed on the surface of a substrate by film formation or coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276382A JP2002094284A (en) | 2000-09-12 | 2000-09-12 | Electromagnetic wave absorption resin composition, and electromagnetic wave absorption building material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276382A JP2002094284A (en) | 2000-09-12 | 2000-09-12 | Electromagnetic wave absorption resin composition, and electromagnetic wave absorption building material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002094284A true JP2002094284A (en) | 2002-03-29 |
Family
ID=18761851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000276382A Pending JP2002094284A (en) | 2000-09-12 | 2000-09-12 | Electromagnetic wave absorption resin composition, and electromagnetic wave absorption building material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002094284A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069613A (en) * | 2006-09-16 | 2008-03-27 | Wood One:Kk | Radiowave absorbing wooden board and its manufacturing method |
| JP2010153833A (en) * | 2008-11-25 | 2010-07-08 | Nec Tokin Corp | Radio wave absorber |
| US7807264B2 (en) * | 2007-09-19 | 2010-10-05 | Chung Shan Institute Of Science And Technology, Armaments Bureau, M.N.D. | Electromagnetic wave absorption material and manufacturing method thereof |
| WO2013073634A1 (en) * | 2011-11-18 | 2013-05-23 | 味の素株式会社 | Electromagnetic wave absorption plate, and composition for same and method for manufacturing same |
-
2000
- 2000-09-12 JP JP2000276382A patent/JP2002094284A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069613A (en) * | 2006-09-16 | 2008-03-27 | Wood One:Kk | Radiowave absorbing wooden board and its manufacturing method |
| US7807264B2 (en) * | 2007-09-19 | 2010-10-05 | Chung Shan Institute Of Science And Technology, Armaments Bureau, M.N.D. | Electromagnetic wave absorption material and manufacturing method thereof |
| JP2010153833A (en) * | 2008-11-25 | 2010-07-08 | Nec Tokin Corp | Radio wave absorber |
| WO2013073634A1 (en) * | 2011-11-18 | 2013-05-23 | 味の素株式会社 | Electromagnetic wave absorption plate, and composition for same and method for manufacturing same |
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