JPH0362703A - Electromagnetic wave reflecting body - Google Patents
Electromagnetic wave reflecting bodyInfo
- Publication number
- JPH0362703A JPH0362703A JP1199063A JP19906389A JPH0362703A JP H0362703 A JPH0362703 A JP H0362703A JP 1199063 A JP1199063 A JP 1199063A JP 19906389 A JP19906389 A JP 19906389A JP H0362703 A JPH0362703 A JP H0362703A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- metallic
- electromagnetic wave
- wefts
- metallic wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 6
- 239000000057 synthetic resin Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 43
- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 12
- 238000009941 weaving Methods 0.000 abstract description 15
- 229920005989 resin Polymers 0.000 abstract description 14
- 239000011347 resin Substances 0.000 abstract description 14
- 238000004804 winding Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 229910052755 nonmetal Inorganic materials 0.000 description 12
- 239000002759 woven fabric Substances 0.000 description 12
- 229910001369 Brass Inorganic materials 0.000 description 6
- 239000010951 brass Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000003677 Sheet moulding compound Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 150000002843 nonmetals Chemical class 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0005—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0011—Electromagnetic wave shielding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3456—Antennas, e.g. radomes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Woven Fabrics (AREA)
- 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〕
本発明は衛星放送受信やデータ・ファックシミリ送受信
用のパラボラアンテナ、レーダー障害防止対策やテレビ
ゴースト防止対策の電波吸収体用反射板、パーソナルコ
ンピューター、プリンター等OA a 藷等のEM I
(electromagnetic 1nterf
erence )シールドに用いられる電磁波反射体に
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to parabolic antennas for satellite broadcast reception and data facsimile transmission and reception, reflectors for radio wave absorbers to prevent radar interference and TV ghost prevention, and personal computers. , printers, etc. OA a, etc. EM I
(electromagnetic 1nterf
erence) relates to an electromagnetic wave reflector used for shielding.
これらの電磁波反射体としては金属板そのものを用いる
場合のほか、金属箔とバックアップ樹脂、金網とバンク
アップ樹脂、導電性不織布とバックアップ樹脂、導電性
塗料やZn溶射とバックアップ樹脂、を用いる場合等が
ある。そしてそれぞれの応用において形状あるいは経済
的な面から各種製法が検討されている。As these electromagnetic wave reflectors, in addition to using metal plates themselves, metal foil and backup resin, wire mesh and bank-up resin, conductive non-woven fabric and backup resin, conductive paint, Zn spraying and backup resin, etc. are used. be. Various manufacturing methods are being considered for each application from the viewpoint of shape or economy.
特に電磁波反射材として金網を用いる場合、目的とする
シールド周波数に応じて金属線の織り密度を変更できる
。一般にこの織り密度はA/4以上が必要と言われてい
るが(実開昭59−17615号)、特に衛星放送受信
用パラボラリフレクタ−の場合、反射損失が0.3dB
以内であるのが良好であり、これに基づいて本発明者ら
は既に必要な線径及び密度を提示しである(特開昭61
212904号)。In particular, when a wire mesh is used as an electromagnetic wave reflecting material, the weaving density of the metal wire can be changed depending on the target shielding frequency. It is generally said that this weaving density needs to be A/4 or higher (Utility Model Application No. 17615/1983), but especially in the case of parabolic reflectors for satellite broadcast reception, the reflection loss is 0.3 dB.
Based on this, the present inventors have already proposed the necessary wire diameter and density (Japanese Patent Laid-Open No. 61
No. 212904).
また作業性を上げるため、金属線と非金属線とを混紡し
た織布についても提示したく特開昭61−,16099
号)。In addition, in order to improve workability, we would like to present a woven fabric that is a blend of metal wire and non-metal wire.
issue).
電磁波反射体に用いる′iL磁波反則(1としての金網
は電磁波反射性能に優れていることは当然であるが、軽
量でかつ成形性、含浸性、裁断性等の作業性に優れたも
のが必要である。It goes without saying that the wire mesh used as an electromagnetic wave reflector (1) has excellent electromagnetic wave reflection performance, but it also needs to be lightweight and have excellent workability such as formability, impregnability, and cuttability. It is.
しかし一般のフィルター用金網では線径が100μmの
場合、織り密度(本/25mm、以下同じ)は715〜
120本と細かく、樹脂含浸性が悪く、また織成時に使
う油をトリクレン等で脱脂する必要があり、コスト高と
なる。さらに線径が200μmを越えると、裁断性が悪
く、織密度は20〜65本とやや粗くはできるが重量は
重く、巻きぐせが付き易く取り扱いが面倒である。However, in the case of a general filter wire mesh, when the wire diameter is 100 μm, the weaving density (wires/25 mm, hereinafter the same) is 715 ~
The fibers are as small as 120, and have poor resin impregnation properties, and the oil used during weaving needs to be degreased with trichlene or the like, resulting in high costs. Further, if the wire diameter exceeds 200 μm, the cutting properties are poor, and although the weave density can be made somewhat coarse (20 to 65 wires), the weight is heavy and the wire tends to curl, making it difficult to handle.
また、8〜20GHzのマイクロ波用反射材として金網
を用いる場合、その線径と密度(本/25mm)として
、線径が50〜90μmの場合、密度(120〜80本
で好ましくは30〜50本、線径が90〜130μmの
場合、密度は15〜60本で好ましくは20〜50本、
線径が130〜170μmの場合、密度は10〜45本
で好ましくは20〜40本、が反月月生能、成形性、作
業性、コスト等バランスのとれたR)1′4である(特
開昭61212904号)。しかしながら、これらの範
囲の金網は製造が困難であり、織機も限定されることに
なる。また、金属線の線径と密度をこのように設定して
も、経糸と緯糸のすべてに金属線を用いると、巻きくせ
の付いた布材を成形特に平面状に戻そうとしても巻きぐ
せの除去が不充分となる。In addition, when using a wire mesh as a reflective material for microwaves at 8 to 20 GHz, the wire diameter and density (wires/25 mm) are 50 to 90 μm, and the density (120 to 80 wires, preferably 30 to 50 wires). When the wire diameter is 90 to 130 μm, the density is 15 to 60, preferably 20 to 50,
When the wire diameter is 130 to 170 μm, the density is 10 to 45 wires, preferably 20 to 40 wires, which is R) 1'4, which provides a good balance of reproducibility, formability, workability, cost, etc. JP-A No. 61212904). However, wire meshes in these ranges are difficult to manufacture, and looms are also limited. In addition, even if the wire diameter and density of the metal wire are set in this way, if metal wire is used for all the warp and weft threads, it will be difficult to mold a fabric with curls, especially if you try to return it to a flat shape. Removal becomes insufficient.
さらに、経糸と緯糸のすべてに、特開昭61/1609
9号、特開昭61−212904号に記載されたような
金属線と非金属線との混紡糸を用いると、作業性は向上
するが、糸自体の材料コスト、製造コストが上がるとと
もに、樹脂の含浸により金属線同志の接触抵抗が増え、
電磁波反射性能が低下するおそれがある。In addition, all warp and weft threads are
Using a blended yarn of metal wire and non-metal wire as described in No. 9 and JP-A No. 61-212904 improves workability, but the material cost and manufacturing cost of the yarn itself increases, and the resin Impregnation increases the contact resistance between metal wires,
Electromagnetic wave reflection performance may deteriorate.
本発明は上記事実を考慮し、柔軟で巻きぐせによって加
工性を低下させることが少なく、かつ電磁波反射性能が
良好な電磁波反射体を用いた電磁21に反対体を得るこ
とが同的である。In consideration of the above facts, the present invention is equivalent to obtaining an opposite body to the electromagnetic 21 using an electromagnetic wave reflector that is flexible, does not reduce workability due to curling curls, and has good electromagnetic wave reflection performance.
本発明は、経糸と緯糸とを織成した布材を合成樹脂と一
体化した電磁波反射体であって、前記重相は経糸と緯糸
のいずれか一方が金属線及び非金属線であり、他方が金
属線であることを特徴としている。The present invention is an electromagnetic wave reflector in which a cloth material woven with warp and weft is integrated with a synthetic resin, and in the heavy phase, one of the warp and weft is a metal wire or a non-metal wire, and the other is a metal wire or a non-metal wire. It is characterized by being made of metal wire.
また、本発明では、経糸及び緯糸の金属線は線径を50
μm〜300μmとすることができる。In addition, in the present invention, the metal wires of the warp and weft have a wire diameter of 50
The thickness can be from μm to 300 μm.
このように経糸又は緯糸の一方のみに非金属線を金属線
と合わせ用いることにより柔軟性に富み、巻きぐせを殆
ど生じず、巻きじわがないとともに、低コストで電磁波
反射性能も良好な反射材織布を形成することが可能とな
る。裁断前の織布を形成する全経糸又は緯糸の内、少な
くとも115以上、さらに好ましくは1/3以上の本数
の経糸又は緯糸が非金属線と金属線を合わせたものから
戊ることか柔軟性確保のために望ましい。またこの合わ
せ方としては、1本ないし複数本の非金属線と1本ない
し複数本の金属線とを引きそろえる方法、もしくはこれ
らをあらかじめより合わせる構成が可能である。あるい
は、金属線と非金属線を合わせることなく、非金属線を
適当な間隔て経糸又は綿糸に配してもよい。By using a non-metallic wire in combination with a metal wire for only one of the warp or weft threads, we have created a reflective material that is highly flexible, has almost no winding curls, has no winding creases, is low-cost, and has good electromagnetic wave reflection performance. It becomes possible to form a woven fabric. Out of all the warps or wefts forming the woven fabric before cutting, at least 115 or more warps or wefts, more preferably 1/3 or more warps or wefts are cut from the combination of non-metallic wires and metal wires or flexible. desirable for security. Further, as a method of combining them, a method of aligning one or more non-metallic wires and one or more metal wires, or a configuration in which these are twisted together in advance is possible. Alternatively, the metal wires and the non-metal wires may not be combined, but the non-metal wires may be arranged at appropriate intervals on the warp or cotton yarn.
このようにして作成した金属線入り織布は、適当な形状
に裁断して金型内に積層して樹脂シートと一体的にプレ
ス成形するか、もしくは横開き金型内に垂直に垂らし、
型閉め後射出戊形により樹脂と一体化することが可能で
ある。もし経糸方向が金属線のみから成る場合は巻きじ
わが発生して裁断性も悪く、また垂直方向に垂らすこと
は不可能となる。The metal wire-containing woven fabric created in this way is either cut into an appropriate shape and laminated in a mold and press-molded integrally with the resin sheet, or it is hung vertically in a side-opening mold.
It is possible to integrate it with the resin by injection molding after the mold is closed. If the warp direction is made of only metal wires, winding wrinkles will occur, the cuttability will be poor, and it will be impossible to hang vertically.
経糸及び緯糸に用いる金属線としては黄銅、銅、ステン
レス、亜鉛めっき鉄、アルミ等があるが、加工性、裁断
性、コストを考慮すると黄銅が好ましい。これらは1本
の素線で金属線を形成してもよいが、数本の素線をより
合わせて1本の金属線としてもよい。金属線の線径は5
0〜300μmが良く、さらに好ましくは100〜17
0μmが良い。50μm未満では金属線の織り密度とじ
て/io本/ 25 mm以上が電波反射性能」二必要
となり、織布の製造工数も増大しコストアンプとなる。The metal wires used for the warp and weft include brass, copper, stainless steel, galvanized iron, aluminum, etc., but brass is preferable in consideration of workability, cuttability, and cost. These metal wires may be formed from a single strand, or may be formed by twisting several strands together to form a single metal wire. The wire diameter of the metal wire is 5
0 to 300 μm is good, more preferably 100 to 17
0 μm is good. If the thickness is less than 50 μm, the weaving density of the metal wire must be io wires/25 mm or more for radio wave reflection performance, which increases the number of manufacturing steps for the woven fabric and increases the cost.
また、300μmを超える場合には金属線の強さが増し
織布を織ることが困難となる。金属線の織り密度として
は10〜80本が性能上有効で目的とする周波数に応じ
て適宜選択される。経糸及び緯糸の線径及び織り密度は
電波反対性能、成形性、寸法安定性や強度等によりそれ
ぞれ変えることが可能である。Furthermore, if the thickness exceeds 300 μm, the strength of the metal wire increases and it becomes difficult to weave a woven fabric. The weaving density of the metal wires is appropriately selected from 10 to 80 wires depending on the desired frequency, which is effective in terms of performance. The wire diameters and weaving density of the warp and weft can be changed depending on the radio wave resistance performance, formability, dimensional stability, strength, etc.
非金属線としては、有機材料及び無機材料のいずれも適
用でき、ポリニスデル、ビニロン、ポリーrミド ポリ
エチレン、ポリプロピレン、セルロス、麻、ガラス、炭
素等の繊維、より糸、繊維束、スパン糸あるいはこれら
の混紡糸等が有効である。Both organic and inorganic materials can be used as the non-metallic wire, including fibers such as polynisdel, vinylon, polyamide, polyethylene, polypropylene, cellulose, hemp, glass, carbon, twine, fiber bundle, spun yarn, or blends thereof. String etc. are effective.
第1A図には本発明の第1実施例に係る電磁波反射体用
電磁波反射材の織成構造が示されている。FIG. 1A shows a woven structure of an electromagnetic wave reflecting material for an electromagnetic wave reflector according to a first embodiment of the present invention.
経糸として非金属線12と金属線14が、緯糸として金
属線16が用いられている。非金属線12と金属線14
とは互いに引き揃えて平行状態で配置され、金属線16
とそれぞれ交差した織成構造となっている。A non-metal wire 12 and a metal wire 14 are used as the warp, and a metal wire 16 is used as the weft. Non-metal wire 12 and metal wire 14
are arranged parallel to each other, and the metal wires 16
It has a woven structure that intersects with each other.
この経糸と緯糸の織成構造は平織、綾織等の各種の織方
が適用でき、この点は以下の変形例でも同様である。Various weaving methods such as plain weave and twill weave can be applied to this weaving structure of the warp and weft, and this point also applies to the following modified examples.
次に第1B図には本発明の第2実施例が示されている。Referring next to FIG. 1B, a second embodiment of the present invention is shown.
この実施例では前記第1実施例における経糸内の非金属
線12の本数が金属線14の本数よりも少なくされ、間
引いて用いられている。In this embodiment, the number of non-metallic wires 12 in the warp yarns in the first embodiment is smaller than the number of metal wires 14, and they are thinned out.
第2A図には金属線14が非金属線12の周囲に予めよ
り合わせて用いられた織成構造が示されている。これに
よれば金属線14が確実に非金属線12とより合わされ
ているので、織成が確実になるが、金属線14と金属線
16との接触点が第1実施例の織成構造より減少する可
能性があるので、反射性能は第1実施例の電磁波反射材
より不利になるおそれはある。FIG. 2A shows a woven structure in which metallic wires 14 are pretwisted around non-metallic wires 12. According to this, the metal wire 14 is reliably twisted with the non-metal wire 12, so weaving is ensured, but the contact point between the metal wire 14 and the metal wire 16 is different from the weaving structure of the first embodiment. Therefore, there is a possibility that the reflection performance will be less favorable than that of the electromagnetic wave reflecting material of the first embodiment.
また第4実施例である第2B図では第3実施例における
非金属線12の本数が間引いて少なくされた構成である
。当然ながら、非金属線12が間引かれた部分にある金
属線14は第1B図と同様、よりのないものとなってい
る。Further, in the fourth embodiment shown in FIG. 2B, the number of non-metallic wires 12 in the third embodiment is thinned out and reduced. Naturally, the metal wires 14 in the areas where the non-metallic wires 12 are thinned out are untwisted, as in FIG. 1B.
第3図に示される第5実施例では経糸内の非金属線12
と金属線14とが交互に、それぞれ等間隔で打ち込まれ
た状態が示されている。In the fifth embodiment shown in FIG.
A state in which the metal wires 14 and 14 are alternately implanted at equal intervals is shown.
第4図にはこれらの織成構造が適用されたパラボラアン
テナ20の一例が示されている。このパラボラアンテナ
20ではバックアツプ層24と表面層26との間に電磁
波反射体22が挟持され、バックアンプ層24と表面層
26とが一体的に成形され、全体が放物面状に屈曲して
いる。FIG. 4 shows an example of a parabolic antenna 20 to which these woven structures are applied. In this parabolic antenna 20, an electromagnetic wave reflector 22 is sandwiched between a back-up layer 24 and a surface layer 26, the back-amp layer 24 and the surface layer 26 are integrally formed, and the whole is bent into a parabolic shape. ing.
バックアツプ層24と表面層26とはガラス繊維で強化
された合成樹脂が適用でき、表面層26としては塗装や
インモードル塗装によるか、ガラスやポリエステル糸の
不織布や織布、あるいはこれらを樹脂含浸したブリプレ
グンートを反射材とバックアツプ層用樹脂とともに積層
して一体化してもよい。The back-up layer 24 and the surface layer 26 can be made of synthetic resin reinforced with glass fibers, and the surface layer 26 can be made by painting or in-mold coating, or by using non-woven fabric or woven fabric made of glass or polyester yarn, or resin-impregnated fabric. The bristle gunte may be laminated and integrated with the reflective material and the resin for the back-up layer.
バックアツプ層用樹脂としては繊維強化合成樹(1
脂、非強化合成樹脂のいずれてもよく、熱硬化または熱
可塑性の樹脂がそれぞれ適宜選択される。The resin for the back-up layer may be either a fiber-reinforced synthetic resin or a non-reinforced synthetic resin, and a thermosetting or thermoplastic resin may be selected as appropriate.
このように電磁波反射体22の経糸には金属線14と非
金属線12とが混在されているので、製作後にロール状
に束ねて保存してあった場合でも、成形時に真直状にす
ると巻きぐせは解消して直ちに成形作業が可能となる。In this way, the warp threads of the electromagnetic wave reflector 22 include a mixture of metal wires 14 and non-metal wires 12, so even if the wires are bundled into a roll after being manufactured and stored, the warp threads of the electromagnetic wave reflector 22 will not curl if they are straightened during molding. The problem is resolved and molding work can be started immediately.
なお上記実施例は経糸に金属線と非金属線を、緯糸に金
属線を用いた構成を示したが、逆に金属線と非金属線を
緯糸に用いるようにしてもよい。In the above embodiment, a metal wire and a non-metallic wire are used for the warp threads, and a metal wire is used for the weft threads, but it is also possible to use a metal wire and a non-metallic wire for the weft threads.
さらに成形中に目ずれや切れ等が発生ずる場合は、アク
リル系、ポリエステル系、エポキシ系、ポバール系等の
バインダーにより織布を表面処理してもよい。Furthermore, if misalignment or cuts occur during molding, the surface of the woven fabric may be treated with an acrylic, polyester, epoxy, poval, or the like binder.
上記実施例における第1A図〜第3図には経糸と緯糸と
が大きな間隔をおいて配置した状態で示されているが、
これらは密に織り込むことができるのは言うまでもない
。In FIGS. 1A to 3 in the above embodiment, the warp and weft are shown arranged with a large interval, but
Needless to say, these can be closely interwoven.
実験例
(1)電磁波反射材の織布として経糸方向に線径10
00μmの1本の黄銅線と1本のガラス繊:t、It東
とを引きそろえ20本/ 25 mmの密度として第1
A図のように配置した。緯糸には線径150μmの1本
の黄銅線を24本/ 25 mmの密度で打ち込んだ。Experimental example (1) As a woven fabric of electromagnetic wave reflecting material, one brass wire with a wire diameter of 1000 μm and one glass fiber: T, It East were aligned in the warp direction and the first fabric was made with a density of 20 wires/25 mm.
It was arranged as shown in Figure A. One brass wire with a wire diameter of 150 μm was inserted into the weft at a density of 24 wires/25 mm.
この反射+;I織布と、ノ\ツクアップ層である樹脂ノ
ートとしてシートモールデイングコンパウンド(SMC
)及び表面層としてガラスクロス(100g/m’)を
金型内に積層して加熱圧縮成形した。成形条件として金
型温度140℃、型締圧力50kg/cnt、てキープ
タイム4分間により厚さ3mmの成形品を得た。得られ
た成形品の電磁波反射係数は12 G llzで経糸方
向0.96、年1?糸方1」]0.97の良好なパラボ
ラアンテナを成形した。This reflection+;I woven fabric and a sheet molding compound (SMC
) and glass cloth (100 g/m') as a surface layer were laminated in a mold and heat compression molded. The molding conditions were a mold temperature of 140° C., a mold clamping pressure of 50 kg/cnt, and a hold time of 4 minutes to obtain a molded product with a thickness of 3 mm. The electromagnetic wave reflection coefficient of the obtained molded product is 12 Gllz, 0.96 in the warp direction, and 1? A good parabolic antenna with a thread direction of 0.97 was molded.
(2)反射材織布として経糸方向に線径100μmの1
本の黄銅線と1本のガラス繊維束とをより合わせ、28
本/ 25 mmの打込密度として第2Δ図のように配
置した。緯糸には線径1.50μmの1本の黄銅線を2
4本/ 25 m+nの密度で打ち込んだ。(2) 1 with a wire diameter of 100 μm in the warp direction as a reflective woven fabric
Twist together one brass wire and one glass fiber bundle, 28
They were arranged as shown in Fig. 2Δ with an implantation density of 1/25 mm. One brass wire with a wire diameter of 1.50 μm is used for the weft.
It was implanted at a density of 4 pieces/25 m+n.
この反射材織布を(1)と同様にしてSMCと成形した
。得られた成形品の電磁波反射係数は経糸方向、緯糸方
向に0985と良好なパラボラアンテナ成形品であり、
45形リフレクタ−の場合、利得34dBと高水準を示
した。This reflective woven fabric was molded with SMC in the same manner as in (1). The electromagnetic wave reflection coefficient of the obtained molded product was 0985 in the warp and weft directions, making it a good parabolic antenna molded product.
In the case of the 45 type reflector, the gain was as high as 34 dB.
なお、本発明を以上の実施例のム11<パラボラアンテ
ナ用反射体に適用する場合、特に反射面の短径が90c
m以上の大型パラボラアンテナに用いる場合には、非金
属を用いた経糸方向が、このようなパラボラアンテナ用
反射体の裏面側に一般的に設けられる補強リブ、なかで
も長径(上下)方向に延在する補強リブの方向とほぼ一
致させるようにすることが、反射面のRbな面精度を確
保するために好ましい。In addition, when the present invention is applied to the reflector for a parabolic antenna of the above embodiment, in particular, when the short axis of the reflecting surface is 90 cm.
When used in a large parabolic antenna with a diameter of m or more, the warp direction using a non-metal is a reinforcing rib that is generally provided on the back side of such a reflector for a parabolic antenna, especially one that extends in the long axis (up and down) direction. It is preferable to make the direction substantially coincident with the direction of the existing reinforcing ribs in order to ensure Rb surface accuracy of the reflective surface.
本発明は上記の構成としたので、電磁波反射性能に優れ
、柔軟性に富んで巻きぐせを生じにくい安価な電磁波反
射材を得ることができる。また、樹脂との一体戊形時に
おいてンワや切れがなく、樹脂含浸性に富むため、表面
外観や耐候性に優れる電磁波反射体を得ることができる
。Since the present invention has the above configuration, it is possible to obtain an inexpensive electromagnetic wave reflecting material that has excellent electromagnetic wave reflecting performance, is highly flexible, and is resistant to curling. In addition, there are no cracks or cuts when integrally formed with a resin, and the resin is highly impregnated, making it possible to obtain an electromagnetic wave reflector with excellent surface appearance and weather resistance.
第1Δ図は本発明の第1実施例に係る電磁波反射体用電
磁波反射材の織成構造を示す拡大平面図、第1B図は第
2実施例に係る織成構造の拡大不面目、第2八閃は第3
実施例に係る織成構△を示勺拡犬平面図、第2B図は第
4実施例に係る織成構造を示す拡大平面図、第3図は第
5実施例に係る織成構造を示す拡大平面図、ゴ(4図は
本発明が適用された電磁波反射体の一例を示す縦断面図
である。
12・・・非金属線、
14.16・・・金属線、
20・・・パラボラアンテナ、
22・・・電磁波反射体、
24・・・バックアツプ層、
26・・・表面層。Fig. 1Δ is an enlarged plan view showing the woven structure of the electromagnetic wave reflecting material for an electromagnetic wave reflector according to the first embodiment of the present invention, and Fig. 1B is an enlarged plan view showing the woven structure according to the second embodiment. Eight flashes are the third
An enlarged plan view showing the weaving structure △ according to the example, FIG. 2B is an enlarged plan view showing the weaving structure according to the fourth example, and FIG. 3 shows the weaving structure according to the fifth example. Enlarged plan view, Figure 4 is a longitudinal sectional view showing an example of an electromagnetic wave reflector to which the present invention is applied. 12... Non-metal wire, 14. 16... Metal wire, 20... Parabola Antenna, 22... Electromagnetic wave reflector, 24... Backup layer, 26... Surface layer.
Claims (2)
した電磁波反射体であって、前記布材は経糸と緯糸のい
ずれか一方が金属線及び非金属線であり、他方が金属線
であることを特徴とした電磁波反射体。(1) An electromagnetic wave reflector in which a cloth material woven with warp and weft threads is integrated with a synthetic resin, wherein one of the warp threads and weft threads is a metal wire or a non-metallic wire, and the other is a metal wire. An electromagnetic wave reflector characterized by being a line.
00μmである請求項(1)記載の電磁波反射体。(2) The warp and weft metal wires have a wire diameter of 50 μm to 3
The electromagnetic wave reflector according to claim 1, wherein the electromagnetic wave reflector has a diameter of 00 μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1199063A JPH0362703A (en) | 1989-07-31 | 1989-07-31 | Electromagnetic wave reflecting body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1199063A JPH0362703A (en) | 1989-07-31 | 1989-07-31 | Electromagnetic wave reflecting body |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0362703A true JPH0362703A (en) | 1991-03-18 |
Family
ID=16401494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1199063A Pending JPH0362703A (en) | 1989-07-31 | 1989-07-31 | Electromagnetic wave reflecting body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0362703A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002085609A1 (en) * | 2001-04-20 | 2002-10-31 | Sergio Famea | Plastics reinforced by incorporated fiberglass and metal |
JP2009147610A (en) * | 2007-12-13 | 2009-07-02 | Nippon Telegr & Teleph Corp <Ntt> | Radio repeating apparatus |
-
1989
- 1989-07-31 JP JP1199063A patent/JPH0362703A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002085609A1 (en) * | 2001-04-20 | 2002-10-31 | Sergio Famea | Plastics reinforced by incorporated fiberglass and metal |
JP2009147610A (en) * | 2007-12-13 | 2009-07-02 | Nippon Telegr & Teleph Corp <Ntt> | Radio repeating apparatus |
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