JPS63261899A - Thermoplastic resin compound - Google Patents
Thermoplastic resin compoundInfo
- Publication number
- JPS63261899A JPS63261899A JP9700887A JP9700887A JPS63261899A JP S63261899 A JPS63261899 A JP S63261899A JP 9700887 A JP9700887 A JP 9700887A JP 9700887 A JP9700887 A JP 9700887A JP S63261899 A JPS63261899 A JP S63261899A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- weight
- iron
- fiber
- present
- 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
- 229920005992 thermoplastic resin Polymers 0.000 title claims description 17
- 150000001875 compounds Chemical class 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 239000000835 fiber Substances 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 12
- 239000011342 resin composition Substances 0.000 claims description 10
- 229910000859 α-Fe Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920006380 polyphenylene oxide Polymers 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 101100208721 Mus musculus Usp5 gene Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 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
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- ABLLXXOPOBEPIU-UHFFFAOYSA-N niobium vanadium Chemical compound [V].[Nb] ABLLXXOPOBEPIU-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（ｊｉ業上の利用分野）
本発明は、電子・電気機器のハウジング等の成形材料と
して好適な優れた電磁波シールド性を有する熱可塑性樹
脂組成物に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of industrial application) The present invention relates to a thermoplastic resin composition having excellent electromagnetic shielding properties and suitable as a molding material for housings of electronic and electrical equipment.
（従来の技術）
熱可塑性樹脂に各種形状の導電性フィラーを混入して、
導電性と電磁波シールド性を付与することは従来よシ広
く行なわれている。(Conventional technology) Conductive fillers of various shapes are mixed into thermoplastic resin,
Providing conductivity and electromagnetic shielding properties has been widely practiced in the past.
例えば特開昭５５−１５２７４８号公報「導電性樹脂組
成物」では、鋼線やアルミ線等の繊維状導電性物質をポ
リエステル樹脂、フェノール樹脂等に配合した導電性樹
脂組成物が開示されておシ、更に金属粉の併用効果も示
されている。又、特開昭５８−７８４９９号分報「電磁
波シールド用樹脂材」には、金属繊維を熱可塑性樹脂に
均一に配合して成形する電磁波シールド用樹脂材が開示
されている。For example, JP-A-55-152748 ``Conductive resin composition'' discloses a conductive resin composition in which a fibrous conductive material such as steel wire or aluminum wire is blended with polyester resin, phenol resin, etc. Moreover, the effect of using metal powder in combination has also been shown. Further, JP-A-58-78499 entitled "Resin material for electromagnetic shielding" discloses a resin material for electromagnetic shielding which is formed by uniformly blending metal fibers into a thermoplastic resin.
（発明が解決しようとする問題点）
従来の金属繊維及び／又は金属粉末を配合した樹脂組成
物は、ＩＭＨｚ以上の高周波ゾーンでは優れた電磁波シ
ールド性を示すが、ＩＭＨ２未満の低周波ゾーンの電磁
波に対するシールド性は十分でないという欠点があった
。(Problems to be Solved by the Invention) Conventional resin compositions containing metal fibers and/or metal powders exhibit excellent electromagnetic shielding properties in the high frequency zone of IMHz or higher, but they do not shield electromagnetic waves in the low frequency zone of less than IMH2. The drawback was that the shielding properties against
この原因としては、従来の電磁波シールド性樹脂組成物
に使用される導電性フィシ−が主として電磁波を反射す
ることによってシールドするものであシ、反射によるシ
ールドが困難な低周波ゾーンには効果がないためと考え
られる。The reason for this is that the conductive fibers used in conventional electromagnetic wave shielding resin compositions mainly shield electromagnetic waves by reflecting them, and are not effective in low frequency zones where shielding by reflection is difficult. It is thought that this is because of this.
この欠点を改良する方法として、電磁波吸収性に優れた
カーボンブラックやフェライト粉末を使用することが考
えられるが、この場合は十分なシールド性を得るには、
多量の添加を必要とし、そのため成形加工性及び物性の
低下が著しく、更に高周波ゾーンのシールドにはあまり
効果がないという欠点がありた。One possible way to improve this drawback is to use carbon black or ferrite powder, which have excellent electromagnetic wave absorption properties, but in this case, in order to obtain sufficient shielding properties,
It requires addition of a large amount, resulting in significant deterioration in moldability and physical properties, and has the disadvantage that it is not very effective in shielding high frequency zones.
（問題点を解決するための手段）
本発明者らは、か＼る従来技術の有する欠点を改良すべ
く鋭意研究した結果、熱可塑性樹脂に鉄繊維とフェライ
ト粉末を配合すれば、低周波ゾーンから高周波ゾーンの
全域に於いて優れたシールド性を示すことを発見し、本
発明を達成するに至りた。即ち本発明は、熱可塑性樹脂
２０〜６０重量％、鉄繊維８０〜７０重量％及びフェラ
イト粉末１０〜５０！量％よりなる熱可塑性樹脂組成物
である。(Means for Solving the Problems) As a result of intensive research to improve the drawbacks of the prior art, the present inventors found that by blending iron fibers and ferrite powder with thermoplastic resin, the low frequency zone The present inventors have discovered that this material exhibits excellent shielding properties over the entire high frequency zone, and have achieved the present invention. That is, the present invention contains 20 to 60% by weight of thermoplastic resin, 80 to 70% by weight of iron fiber, and 10 to 50% by weight of ferrite powder. % of the thermoplastic resin composition.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に使用する熱可塑性樹脂は、加熱による溶融流動
性を有し、射出成形加工出来るものであれば特に制限さ
れないが、本発明の目的を達成する上で特に好ましいも
のとしてポリアミド、ポリエステル、ポリプロピレン、
ポリスチレン、ポリフェニレンオキサイド及びＡＢＳ樹
脂が挙げられる。熱可塑性樹脂の配合量は、本発明にか
＼る熱可塑性樹脂組成物全体に対して２０〜６０重景％
とすることが肝要である。２０重量％未満の場合には溶
融流動性に乏しく、射出成形加工が甚だ困難になシ、一
方６０ｔｆｋ％を超える場合には、全周波域に於けるシ
ールド性が不十分となり、ともに本発明の目的を達成す
ることが出来ない。The thermoplastic resin used in the present invention is not particularly limited as long as it has melt flowability when heated and can be processed by injection molding, but polyamide, polyester, and polypropylene are particularly preferred for achieving the purpose of the present invention. ,
Mention may be made of polystyrene, polyphenylene oxide and ABS resin. The blending amount of the thermoplastic resin is 20 to 60% by weight based on the entire thermoplastic resin composition according to the present invention.
It is important to do so. If it is less than 20% by weight, the melt flowability will be poor and injection molding will be extremely difficult, while if it exceeds 60tfk%, the shielding properties in the entire frequency range will be insufficient, and both of these will result in poor melt flowability and difficulty in injection molding. Unable to achieve purpose.
本発明に使用する鉄繊維は鉄を主成分とする金属繊維で
あシ、例えば純鉄、低炭素鋼、ステンレス鋼、ａｓｓ、
コバルト鋼、パーマロイ、クロム鋼、マンガン鋼、モリ
ブデン鋼、バナジウム鋼、チタニウム鋼、ニオブーバナ
ジウム鋼等０１種又は２種以上からなる繊維が挙げられ
るが、特に純鉄、低炭素鋼、ステンレス鋼が好ましい。The iron fiber used in the present invention is a metal fiber whose main component is iron, such as pure iron, low carbon steel, stainless steel, ASS,
Examples include fibers made of one or more types of cobalt steel, permalloy, chromium steel, manganese steel, molybdenum steel, vanadium steel, titanium steel, niobium vanadium steel, etc., but especially pure iron, low carbon steel, and stainless steel. preferable.
本発明に使用する鉄繊維の製造法としては、例えば伸線
加工法、溶融紡糸法、びびシ振動切削法、線材或いは鋼
板からの切削加工法、箔からのスリット加工法等が挙げ
られる。鉄繊維の形状は特に制限を受けないが、好まし
くは繊径が５〜１５０μｍ１繊維長が０．２〜５ｍｍの
ものを使用する。Examples of methods for manufacturing the iron fibers used in the present invention include wire drawing, melt spinning, vibrating vibration cutting, cutting from a wire or steel plate, and slitting from foil. The shape of the iron fibers is not particularly limited, but preferably those having a fiber diameter of 5 to 150 μm and a fiber length of 0.2 to 5 mm are used.
鉄繊維の配合量は、８０〜７０重量％とする。The blending amount of iron fiber is 80 to 70% by weight.
８０重量％未満の配合量の場合は、高周波ゾーンの電磁
波シールド性がほとんどなく、一方７０重量％を超える
場合には溶融流動性に乏しく、射出成形加工が困難とな
る。When the amount is less than 80% by weight, there is almost no electromagnetic shielding property in the high frequency zone, while when it is more than 70% by weight, the melt flowability is poor and injection molding becomes difficult.
本発明に使用するフェライト粉末は一般化学式Ｆｅ２０
Ｆｅ２０ｌは２価の金Ｉ４）で示される金属化合物の粉
末である。Ｍで示される２価の金属は特に限定されるも
のではないが、本発明の目的を達成する上で特に好まし
いものとして、ニッケル−亜鉛系フェライト及びマンガ
ン−亜鉛系フェライトが挙げられる。フェライト粉末の
形状は、通常、平均粒子径６μｍ以下のものを使用する
が、特に制限はされない。本発明に於いては、フェライ
ト粉末の配合量は１０〜５０重量％とすることが肝要で
ある。１０重量％未満の場合、低周波ゾーンでの電磁波
シールド性が不十分となり、一方５０重量％を超える場
合には物性の低下が著しくなシ、ともに本発明の目的を
達成出来ない。The ferrite powder used in the present invention has the general chemical formula Fe20
Fe20l is a powder of a metal compound represented by divalent gold I4). The divalent metal represented by M is not particularly limited, but nickel-zinc ferrite and manganese-zinc ferrite are particularly preferred for achieving the object of the present invention. The shape of the ferrite powder is not particularly limited, although it usually has an average particle diameter of 6 μm or less. In the present invention, it is important that the amount of ferrite powder blended is 10 to 50% by weight. If it is less than 10% by weight, the electromagnetic shielding properties in the low frequency zone will be insufficient, while if it exceeds 50% by weight, the physical properties will be significantly deteriorated and the object of the present invention cannot be achieved.
本発ｖ４Ｋか＼る熱可塑性樹脂組成物の製造法は、最終
的に射出成形加工される迄の任意の段階で熱可塑性樹脂
、鉄繊維及びフェライト粉末が均一に混線、分散されて
いれば良い。例えば所定割合の熱可塑性樹脂、鉄繊維及
びフェライト粉末とを単軸混練機或いは多軸混練機を用
いて溶融混練してペレットｔ−製造した後、射出成形加
工してもよく、又全ての成分を直接混線射出成形しても
よい。In the method for producing the thermoplastic resin composition developed by V4K, it is sufficient that the thermoplastic resin, iron fibers, and ferrite powder are uniformly mixed and dispersed at any stage up to the final injection molding process. . For example, a predetermined proportion of thermoplastic resin, iron fiber, and ferrite powder may be melt-kneaded using a single-screw kneader or multi-screw kneader to produce pellets, and then injection molding may be performed. may be directly mixed injection molded.
（発明の効果）
本発明にか＼る熱可塑性樹脂組成物は、優れた物性バラ
ンスと電磁波シールド性を有し、且つ射出成形条件査
ウジング材料として好適である。(Effects of the Invention) The thermoplastic resin composition according to the present invention has an excellent balance of physical properties and electromagnetic shielding properties, and is suitable as a welding material for inspection of injection molding conditions.
（実施例）
以下、実施例を用いて本発明の更に詳細な説明を行なう
。尚、実施例に示す物性の測定は以下の方法で行なった
。(Examples) Hereinafter, the present invention will be explained in more detail using Examples. The physical properties shown in the Examples were measured by the following method.
（１）引張強度；Ａ８ＴＭＤ−６８８
（２） 曲げ弾性率；Ａ８ＴＭＤ−７９０（３）
衝撃強度；＾ＳＴＭＤ−２５６（アイゾツト、ノツチ付
、１Ｘ４インチ）
（４） シールド性；アトパンテスト法（２００ＫＨ
ｚは磁界波、５００ＭＨ２は電
界波に対するシールド性）
実施例１〜４及び比較例１〜４
ナイロン６樹脂（鐘紡■製、ＭＣ１０２）、びびり振動
切削法による繊径８０μｍ、繊維長２ｍｍの低炭素鋼繊
維（■神戸鋳鉄新製、５ｉ５Ｃ。(1) Tensile strength; A8TMD-688 (2) Flexural modulus; A8TMD-790 (3)
Impact strength: ＾STMD-256 (isot, notched, 1X4 inch) (4) Shielding property: Atopan test method (200KH
z is magnetic field wave, 500MH2 is shielding property against electric field wave) Examples 1 to 4 and Comparative Examples 1 to 4 Nylon 6 resin (manufactured by Kanebo ■, MC102), low carbon fiber diameter 80 μm and fiber length 2 mm by chatter vibration cutting method Steel fiber (Newly made by Kobe Cast Iron, 5i5C.
８０Ｘ２及びマンガン−亜鉛系フェライト（戸田工業■
製、ＢＳＦ−５４７）を第１表に示す組成で配合し、２
軸混練機を用いて溶融混練してペレットを得た。尚、Ｎ
ｏ、８の試料は溶融流動性が悪く、ペレット化すること
が出来々かりた。80X2 and manganese-zinc ferrite (Toda Kogyo ■
BSF-547) was blended with the composition shown in Table 1, and 2
Pellets were obtained by melt-kneading using an axial kneader. Furthermore, N
Samples o and 8 had poor melt fluidity and could not be pelletized.
次いで、得られたペレットを用いて通常実施されている
ナイロン６樹脂の射出成形条件で成形し、物性測定用サ
ンプルを得た。Next, the obtained pellets were molded under commonly used injection molding conditions for nylon 6 resin to obtain samples for measuring physical properties.
Claims (5)
０重量％及びフェライト粉末１０〜５０重量％よりなる
熱可塑性樹脂組成物。(1) Thermoplastic resin 20-60% by weight, iron fiber 80-7%
A thermoplastic resin composition comprising 0% by weight and 10 to 50% by weight of ferrite powder.
プロピレン、ポリスチレン、ポリフェニレンオキサイド
及びＡＢＳ樹脂である特許請求の範囲第１項記載の組成
物。(2) The composition according to claim 1, wherein the thermoplastic resin is polyamide, polyester, polypropylene, polystyrene, polyphenylene oxide, and ABS resin.
特許請求の範囲第１項記載の組成物。(3) The composition according to claim 1, wherein the iron fiber is pure iron, low carbon steel, or stainless steel.
〜５ｍｍである特許請求の範囲第１項記載の組成物。(4) The fiber diameter of the iron fiber is 5 to 150 μm, and the fiber length is 0.2
5. The composition of claim 1, wherein the diameter is 5 mm.
ガン−亜鉛フェライトである特許請求の範囲第１項記載
の組成物。(5) The composition according to claim 1, wherein the ferrite is a nickel-zinc ferrite or a manganese-zinc ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9700887A JPS63261899A (en) | 1987-04-20 | 1987-04-20 | Thermoplastic resin compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9700887A JPS63261899A (en) | 1987-04-20 | 1987-04-20 | Thermoplastic resin compound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63261899A true JPS63261899A (en) | 1988-10-28 |
Family
ID=14180247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9700887A Pending JPS63261899A (en) | 1987-04-20 | 1987-04-20 | Thermoplastic resin compound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63261899A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02178356A (en) * | 1988-12-29 | 1990-07-11 | Kawasaki Techno Res Kk | Colored material for shielding electromagnetic wave |
| JPH02242856A (en) * | 1989-01-23 | 1990-09-27 | Toray Dow Corning Silicone Co Ltd | Self-heat generative polymer composition and heat generating method thereof |
| JPH0364005A (en) * | 1989-08-01 | 1991-03-19 | Mitsubishi Electric Corp | Plastic composition containing ferrite |
| JPH03114295A (en) * | 1989-09-27 | 1991-05-15 | Yoshio Niioka | Radio wave absorber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116957A (en) * | 1984-07-04 | 1986-01-24 | Sumitomo Bakelite Co Ltd | Material for shielding electromagnetic interference |
| JPS6126666A (en) * | 1984-07-16 | 1986-02-05 | Fujikura Rubber Ltd | Electromagnetic wave shielding composition |
| JPS6174203A (en) * | 1984-09-17 | 1986-04-16 | 住友化学工業株式会社 | Electroconductive plastic composition for shielding electromagnetic wave |
| JPS61110497A (en) * | 1984-11-02 | 1986-05-28 | 松下電工株式会社 | Molding material for electromagnetic shield |
| JPS61155452A (en) * | 1984-12-27 | 1986-07-15 | Fujikura Rubber Ltd | Electromagnetic wave shielding composition |
-
1987
- 1987-04-20 JP JP9700887A patent/JPS63261899A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6116957A (en) * | 1984-07-04 | 1986-01-24 | Sumitomo Bakelite Co Ltd | Material for shielding electromagnetic interference |
| JPS6126666A (en) * | 1984-07-16 | 1986-02-05 | Fujikura Rubber Ltd | Electromagnetic wave shielding composition |
| JPS6174203A (en) * | 1984-09-17 | 1986-04-16 | 住友化学工業株式会社 | Electroconductive plastic composition for shielding electromagnetic wave |
| JPS61110497A (en) * | 1984-11-02 | 1986-05-28 | 松下電工株式会社 | Molding material for electromagnetic shield |
| JPS61155452A (en) * | 1984-12-27 | 1986-07-15 | Fujikura Rubber Ltd | Electromagnetic wave shielding composition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02178356A (en) * | 1988-12-29 | 1990-07-11 | Kawasaki Techno Res Kk | Colored material for shielding electromagnetic wave |
| JPH02242856A (en) * | 1989-01-23 | 1990-09-27 | Toray Dow Corning Silicone Co Ltd | Self-heat generative polymer composition and heat generating method thereof |
| JPH0364005A (en) * | 1989-08-01 | 1991-03-19 | Mitsubishi Electric Corp | Plastic composition containing ferrite |
| JPH03114295A (en) * | 1989-09-27 | 1991-05-15 | Yoshio Niioka | Radio wave absorber |
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