JPS63189208A - Manufacture of electrically conductive polyvinyl chloride resin pellet - Google Patents
Manufacture of electrically conductive polyvinyl chloride resin pelletInfo
- Publication number
- JPS63189208A JPS63189208A JP62022167A JP2216787A JPS63189208A JP S63189208 A JPS63189208 A JP S63189208A JP 62022167 A JP62022167 A JP 62022167A JP 2216787 A JP2216787 A JP 2216787A JP S63189208 A JPS63189208 A JP S63189208A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl chloride
- resin
- chloride resin
- conductive
- extruder
- 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
- 229920005989 resin Polymers 0.000 title claims abstract description 58
- 239000011347 resin Substances 0.000 title claims abstract description 58
- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 37
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 37
- 239000008188 pellet Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 5
- 210000002445 nipple Anatomy 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract 1
- 230000009969 flowable effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 6
- 229920002554 vinyl polymer Polymers 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- -1 Kagen black Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/156—Coating two or more articles simultaneously
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は導電性ポリ塩化ビニル樹脂ペレットの製造方法
に関するものであり、フィラーを導電性ファイバーとし
、マトリックスにポリ塩化ビニル樹脂を使用して導電性
ポリ塩化ビニル樹脂ペレットを製造せんとするものであ
る。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for producing conductive polyvinyl chloride resin pellets, in which conductive fibers are used as fillers and polyvinyl chloride resin is used as a matrix to produce conductive polyvinyl chloride resin pellets. The objective is to produce polyvinyl chloride resin pellets.
（従来の技術）
従来マトリックス樹脂例えばポリ塩化ビニルｆｌ１４脂
に導電性ファイバーを分散せしめた導電性ポリ塩化ビニ
ル樹脂にて電磁波シールド材料を製造するには次の如き
方法により行っているものである。(Prior Art) Conventionally, an electromagnetic shielding material is manufactured using a conductive polyvinyl chloride resin in which conductive fibers are dispersed in a matrix resin such as polyvinyl chloride FL14 resin by the following method.
（１）押出機等によってマトリックス樹脂と長さ５ｓａ
＋程度にカッティングした導電性ファイバーとを混練し
、該樹脂中に導電性ファイバーを分散せしめた後、所望
の長さに切断してベレットをうる方法。(1) Matrix resin and length 5sa by extruder etc.
A method of kneading conductive fibers that have been cut to approximately 100 mm, dispersing the conductive fibers in the resin, and then cutting the conductive fibers into desired lengths to obtain pellets.
（２） 導電性ファイバーのストランドに直接マトリ
ックス樹脂を押出機により被覆し、これを所望の長さに
切断してペレットをうる方法。(2) A method in which a conductive fiber strand is directly coated with a matrix resin using an extruder, and the strand is cut into a desired length to obtain pellets.
（３）導電性ファイバーのストランドをホットメルト樹
脂にディップして被覆した後、これを所望の長さに切断
してペレットをつる方法。(3) A method in which a strand of conductive fiber is coated by dipping it in hot melt resin, and then cut into a desired length to form pellets.
（４）溶媒に溶解したマ） ＩＪソックス脂に導電性フ
ァイバーをディップして被覆した後、これを所望の長さ
に切断してペレットをうる方法。(4) A method in which conductive fibers are dipped and coated in IJ sock fat and then cut into desired lengths to obtain pellets.
然しなから上記（１）の方法は押出機等で導電性ファイ
バーと樹脂とを混練する際に、導電性ファイバーをスク
リューによる直接切断や樹脂の剪断による切断によりて
導電性ファイバーを混練する当初より短尺化されると共
にこの両者による混和物を使用して押出成形、射出成形
等で電磁波シールド材料とする場合に、導電性ファイバ
ーは一１短′□ 尺化となる。このように短尺状の導電
性ファイバ（１，０１以下）を樹脂中に分散せしめたと
しても導電性ファイバー相互の接触回数が多くなるため
抵抗値が増大し実用的なシールド効果をうろことが出来
ないものであった。従ってシールド効果を向上せしめる
ために樹脂中に混入する導電性ファイバーを多量にしな
ければならずコスト高にならざるをえなかった。又（２
）の方法は導電性ファイバーの切断は防止しうるも成形
時に導電性ファイバーが樹脂中に分散し難いという問題
を生ずる。即ち導電性ファイバーとマトリックス樹脂と
の濡れ性が劣るために導電性ファイバーが樹脂中に均一
に混入しないためである。従って抵抗値が増大しシール
ド効果をうろことが出来ないものである。However, in the method (1) above, when kneading conductive fibers and resin in an extruder or the like, the conductive fibers are directly cut with a screw or cut by shearing the resin. When the length of the conductive fiber is shortened and when a mixture of the two is used to make an electromagnetic shielding material by extrusion molding, injection molding, etc., the length of the conductive fiber is shortened by 11'. Even if short conductive fibers (1.01 or less) are dispersed in resin in this way, the number of times the conductive fibers come into contact with each other increases, increasing the resistance value and making it impossible to obtain a practical shielding effect. It was something that didn't exist. Therefore, in order to improve the shielding effect, a large amount of conductive fiber must be mixed into the resin, resulting in an increase in cost. Also (2
Although the method (2) can prevent the conductive fibers from being cut, it poses a problem in that the conductive fibers are difficult to disperse in the resin during molding. That is, this is because the conductive fibers are not uniformly mixed into the resin due to poor wettability between the conductive fibers and the matrix resin. Therefore, the resistance value increases and the shielding effect cannot be improved.
又（３）の方法は加工性に劣ると共に経済的でない。Furthermore, method (3) has poor processability and is not economical.
更に（４）の方法は表面形状に劣り且つ溶媒を使用する
ためコスト高になるという欠点があった。Furthermore, method (4) has the drawbacks of poor surface shape and high cost due to the use of a solvent.
（発明が解決しようとする問題点）
本発明はかかる現状に鑑み鋭意研究を行った結果、導電
性ファイバーの集束（表面処理）とマトリックス樹脂の
被覆とを押出機により同時に行うことＫよって成形時に
分散性がよく且つファイバー繊維の長さを長く混入させ
ることにより電磁波シールドの効果に優れた電磁波シー
ルド材料をうることが出来る方法を開発したものである
。(Problems to be Solved by the Invention) As a result of extensive research in view of the current situation, the present invention has been developed by performing convergence (surface treatment) of conductive fibers and coating with matrix resin at the same time using an extruder. A method has been developed that can produce an electromagnetic shielding material with excellent electromagnetic shielding effect by incorporating fibers with good dispersibility and long fiber lengths.
（問題点を解決するための手段）
本発明方法は多数本の導電性ファイバー上に、ポリ塩化
ビニル樹脂を被覆して導電性ポリ塩化ビニル樹脂を製造
するにあたシ導電性ファイバー上に予め該ポリ塩化ビニ
ル樹脂と相容性を有し且つ溶融時高流動性を有する樹脂
を加圧含浸して集束せしめた後、該樹脂が流動性を喪失
しない状態にて、その外側にポリ塩化ビニル樹脂を押出
し被覆して複合体した後、該複１合体を所望の長さに切
断しペレット化するものである。(Means for Solving the Problems) The method of the present invention involves coating a large number of conductive fibers with polyvinyl chloride resin to produce conductive polyvinyl chloride resin. After pressure-impregnating and converging a resin that is compatible with the polyvinyl chloride resin and has high fluidity when melted, polyvinyl chloride is added to the outside of the resin without losing fluidity. After the resin is extruded and coated to form a composite, the composite is cut into desired lengths and pelletized.
而して本発明方法において導電性ファイバーとしては、
例えば４〜５０μｍφ、のカーゲンブラック、ステンレ
ススチール、銅、鉄、アルミニウム等のファイバーを１
０００〜２００００本集束してストランドにしたもので
ある。In the method of the present invention, the conductive fibers include:
For example, fibers such as Kagen black, stainless steel, copper, iron, aluminum, etc. with a diameter of 4 to 50 μm are
000 to 20,000 fibers are bundled into a strand.
この導電性ファイバ上にタンデム押出し又はコモンヘッ
ドによってポリ塩化ビニル樹脂と相容性のある樹脂を含
浸せしめるものであるが、このポリ塩化ビニル樹脂と相
容性のある樹脂としては、１６０〜１７０℃において溶
融粘度が１００００以下のものが望ましく、好ましくは
ｓ ｏ ｏ ｏ ｃｐｓ以下の流動性の高いものがよく
、例えばＭ、Ｉ １００以上のＥＶＡ 、 Ｍ、Ｉ Ｉ
ＯＯ以上ノＥＥＡ又は−（−（０Ｍ２）５Ｃ−０＋ｎ
（ｎ＜３ｏ ｏ ）の構造式を有するポリエステル樹脂
を使用するものである。This conductive fiber is impregnated with a resin compatible with polyvinyl chloride resin by tandem extrusion or common head. It is desirable to have a melt viscosity of 10,000 or less, preferably a material with high fluidity of 10,000 cps or less, such as M, I, EVA of 100 or more, M, I
OO or more no EEA or -(-(0M2)5C-0+n
A polyester resin having the structural formula (n<3o o) is used.
このように導電性ファイバーに予めぼり塩化ビニル樹脂
と相客性のある樹脂を含浸せしめる理由は、導電性ファ
イバーと−り塩化ビニル樹脂との濡れ性を良好にし該フ
ァイバーがポリ塩化ビニル樹脂中に均一に分散すること
が出来るためである。The reason why the conductive fiber is pre-impregnated with a resin that is compatible with the PVC resin is to improve the wettability between the conductive fiber and the PVC resin. This is because it can be uniformly dispersed.
又ポリ塩化ビニル樹脂としては、ポリ塩化ビニル樹脂単
独の他に、塩化ビニル−ＥＶＡ共重合体、塩化ビニル−
塩素化ポリエチレン共重合体、塩化ビニル−ＮＢＲ共重
合体、塩化ビニルエラストマ等をも含むものである。In addition to polyvinyl chloride resin alone, examples of polyvinyl chloride resin include vinyl chloride-EVA copolymer and vinyl chloride-EVA copolymer.
It also includes chlorinated polyethylene copolymers, vinyl chloride-NBR copolymers, vinyl chloride elastomers, and the like.
（冥施例）
実施例（１）〜（３）
図面に示す如く、第１押出機１と第２押出機２とをタン
デムに配置し、Ｉり塩化ビニルを押出す第１押出機１の
クロスヘッド３内に第２押出機２のニップルホルダー４
を接続’Ｌ、該ニップルホルダー４内には第２押出機２
より押出されたＥＶＡ（三井ポリケミカル社製、商品名
二）々フレックス４５Ｘ）（実施例１ ） 、 ＥＥＡ
（目方化学社製商品名しクスポール）（実施例２）、
ポリエステル樹脂（ダイセル化学社製商品名、ゾラクセ
ールＡ−１）（実施例３）が充満している。又ステンレ
スファイバー（８μｍφＸ５０００本）８を矢印方向か
ら導入せしめ真空装置５内にて核ファイバー中の空気を
空気を除去した後、該ニップルホルダー内にて上記の樹
脂を１０ｗｔ％含浸せしめて集束した後次いでその外側
に第２押出機より上記のポリ塩化ビニル樹脂を押出し被
覆せしめた複合体をダイス６より押出した後これを冷却
し、長さ６ｍに切断して本発明導電性ポリ塩化ビニルベ
レットをえた。(Example) Examples (1) to (3) As shown in the drawings, a first extruder 1 and a second extruder 2 are arranged in tandem, and the first extruder 1 extrudes vinyl chloride. A nipple holder 4 of the second extruder 2 is installed in the crosshead 3.
Connect 'L, and the second extruder 2 is inside the nipple holder 4.
Extruded EVA (manufactured by Mitsui Polychemical Co., Ltd., trade name 2) Flex 45X) (Example 1), EEA
(Product name: Shiksupol manufactured by Meka Kagaku Co., Ltd.) (Example 2),
It is filled with polyester resin (product name: Zoraxel A-1, manufactured by Daicel Chemical Co., Ltd.) (Example 3). In addition, stainless steel fibers (8 μm φ x 5000 pieces) 8 were introduced from the direction of the arrow, and the air in the nuclear fibers was removed in the vacuum device 5, and then impregnated with 10 wt% of the above resin in the nipple holder and focused. Next, a composite body whose outside was extruded and coated with the above-mentioned polyvinyl chloride resin from a second extruder was extruded from die 6, cooled, and cut into lengths of 6 m to form conductive polyvinyl chloride pellets of the present invention. I got it.
なお、９は真空計、１０は加熱体である比較例（１）
実施例（１）と同様のステンレスファイバーに直接ポリ
塩化ビニル樹脂（理研ビニル社製）を被覆した後冷却し
、長さ６■に切断して比較例導電性７Ｊソり塩化ビニル
ベレットをえた。In addition, 9 is a vacuum gauge, and 10 is a heating element. Comparative Example (1) The same stainless steel fiber as in Example (1) was directly coated with polyvinyl chloride resin (manufactured by Riken Vinyl Co., Ltd.) and then cooled. (2) A comparative conductive 7J warped vinyl chloride pellet was obtained by cutting into pieces.
斯くして得た本発明導電性ポリ塩化ビニルベレットと比
較例導電性ポリ塩化ビニルベレットについてその性能を
試験した。即ち上記ベレットについて射出成形を行い６
０Ｘ６０Ｘ３ｍのシートを作製し、体積抵抗率及び電磁
波シールド効果を測定した。その結果は第１表に示す通
９である。The thus obtained conductive polyvinyl chloride pellets of the present invention and the comparative conductive polyvinyl chloride pellets were tested for their performance. That is, injection molding is performed on the above pellet 6
A sheet of 0 x 60 x 3 m was produced, and its volume resistivity and electromagnetic shielding effect were measured. The results are shown in Table 1.
第１表
註（１）シールド効果は３００ ＭＨｚ（ｄＢ）Ｋて測
定した上表よシ明らかな如く本発明方法によシ製造した
導電性ポリ塩化ビニルベレットによれば体積抵抗率及び
電磁波シールド効果が優れていることが確認された。Notes to Table 1 (1) The shielding effect was measured at 300 MHz (dB) K. As is clear from the above table, the volume resistivity and electromagnetic shielding effect of the conductive polyvinyl chloride pellets manufactured by the method of the present invention were measured at 300 MHz (dB)K. was confirmed to be excellent.
（効果）
以上詳述した如く本発明方法によればアスペクト比が１
００以上と大きく、成形時の導電性ファイバーのマ）
ＩＪツクス拉ｊ脂への分散が良好なため導電性ファイバ
ーの含有蓋が食散でよい。従って軽量にして安価であり
且つシールド効果に侵れているためコネクター、ケーブ
ル等に使用し極めて有用である。(Effects) As detailed above, according to the method of the present invention, the aspect ratio is 1.
00 or more, and the conductive fiber mass during molding)
Since it is well dispersed in IJTx resin, the lid containing the conductive fibers can be used as a food dispersion. Therefore, it is lightweight, inexpensive, and has a good shielding effect, making it extremely useful for use in connectors, cables, etc.
図面は本発明方法導電性ポリ塩化ビニル樹脂の製造方法
の１例を示す概略説明図である。The drawing is a schematic explanatory view showing one example of the method for producing conductive polyvinyl chloride resin according to the present invention.
Claims (2)
脂を被覆して導電性ポリ塩化ビニル樹脂を製造するにあ
たり、導電性ファイバー上に予め該ポリ塩化ビニル樹脂
と相容性を有し且つ溶融時高流動性を有する樹脂を加圧
含浸して集束せしめた後、該樹脂が流動性を喪失しない
状態にし、その外側にポリ塩化ビニル樹脂を押出し被覆
して複合体とした後、該複合体を所望の長さに切断する
ことを特徴とする導電性ポリ塩化ビニル樹脂ペレットの
製造方法。(1) When manufacturing a conductive polyvinyl chloride resin by coating a large number of conductive fibers with polyvinyl chloride resin, the conductive fibers must be coated with a polyvinyl chloride resin that is compatible with the polyvinyl chloride resin in advance and After pressurizing and impregnating a resin that has high fluidity when melted and converging it, the resin is kept in a state where it does not lose its fluidity, and then a polyvinyl chloride resin is extruded and coated on the outside to form a composite. A method for producing conductive polyvinyl chloride resin pellets, which comprises cutting the body into a desired length.
．Ｉ．１００以上のＥＶＡ、ＭＩ１００以上のＥＥＡ、
▲数式、化学式、表等があります▼の構造式（ただしｎ
＜３００） を有するポリエステル樹脂の群から選らばれたいずれか
の樹脂であることを特徴とする特許請求の範囲第１項記
載の導電性ポリ塩化ビニル樹脂ペレットの製造方法。(2) A resin compatible with polyvinyl chloride resin is M
．． I. EVA of 100 or more, EEA of MI100 or more,
▲There are mathematical formulas, chemical formulas, tables, etc. ▼'s structural formula (however, n
<300) The method for producing conductive polyvinyl chloride resin pellets according to claim 1, characterized in that the resin is any resin selected from the group of polyester resins having the following properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62022167A JPS63189208A (en) | 1987-02-02 | 1987-02-02 | Manufacture of electrically conductive polyvinyl chloride resin pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62022167A JPS63189208A (en) | 1987-02-02 | 1987-02-02 | Manufacture of electrically conductive polyvinyl chloride resin pellet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63189208A true JPS63189208A (en) | 1988-08-04 |
Family
ID=12075255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62022167A Pending JPS63189208A (en) | 1987-02-02 | 1987-02-02 | Manufacture of electrically conductive polyvinyl chloride resin pellet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63189208A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177629A (en) * | 1991-03-08 | 1993-07-20 | Asahi Fiber Glass Co Ltd | Preparation of pellet |
| US7708920B2 (en) * | 2001-02-15 | 2010-05-04 | Integral Technologies, Inc. | Conductively doped resin moldable capsule and method of manufacture |
| WO2012048097A3 (en) * | 2010-10-06 | 2012-06-28 | Inteva Products Llc. | Method and apparatus for providing reinforced composite materials with emi shielding |
-
1987
- 1987-02-02 JP JP62022167A patent/JPS63189208A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177629A (en) * | 1991-03-08 | 1993-07-20 | Asahi Fiber Glass Co Ltd | Preparation of pellet |
| US7708920B2 (en) * | 2001-02-15 | 2010-05-04 | Integral Technologies, Inc. | Conductively doped resin moldable capsule and method of manufacture |
| WO2012048097A3 (en) * | 2010-10-06 | 2012-06-28 | Inteva Products Llc. | Method and apparatus for providing reinforced composite materials with emi shielding |
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