JPH0159884B2 - - Google Patents
Info
- Publication number
- JPH0159884B2 JPH0159884B2 JP57132047A JP13204782A JPH0159884B2 JP H0159884 B2 JPH0159884 B2 JP H0159884B2 JP 57132047 A JP57132047 A JP 57132047A JP 13204782 A JP13204782 A JP 13204782A JP H0159884 B2 JPH0159884 B2 JP H0159884B2
- Authority
- JP
- Japan
- Prior art keywords
- molding material
- conductive
- carbon fiber
- filler
- conductive filler
- 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.)
- Expired
Links
- 239000012778 molding material Substances 0.000 claims description 16
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 11
- 239000004917 carbon fiber Substances 0.000 claims description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000011231 conductive filler Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000007740 vapor deposition Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 description 7
- 239000008188 pellet Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 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
- 239000004020 conductor Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
- B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
-
- 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
- B29K2307/00—Use of elements other than metals as reinforcement
-
- 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
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は電磁波遮蔽効果のすぐれた導電性成形
材料の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for producing a conductive molding material having an excellent electromagnetic wave shielding effect.
電子機器の発展に伴つて電磁波の影響を受け、
電子機器が誤動作することがあり、これを防止す
るため、これら電子機器のエンクロージヤーに電
磁波遮蔽のための対策が要望されている。現在実
施されている防止方法は、導電塗料のコーテイン
グ、金属熔射による被膜形成、アルミ箔の接着、
スパツタまたはメツキ等による金属被膜加工等が
主流を占め、成形材料に導電材を混入する方法で
エンクロージヤーを製造する例は多くない。
With the development of electronic devices, they are affected by electromagnetic waves,
Electronic devices sometimes malfunction, and in order to prevent this, enclosures for these electronic devices are required to take measures to shield electromagnetic waves. Current prevention methods include coating with conductive paint, forming a film by metal spraying, adhering aluminum foil,
Metal coating processing by sputtering or plating is the mainstream, and there are not many examples of manufacturing enclosures by mixing a conductive material into the molding material.
従来試みられている金属フイラーを成形材料に
混合する方法は、第１図に示す如く予め作られた
金属繊維又は金属箔粉を樹脂との親和性をもたせ
るための予備処理を行いミキサーで樹脂と混合
し、エクストルーター、ニーダー等の造粒機で押
し出し、ペレツトに加工して成形材料とするもの
である。この場合導電性フイラの分散はマトリツ
クスとして供される樹脂と共にその原形状、寸
法、比重の相関により均一に混合することは大変
困難であり高度の技術を必要としている。 The conventional method of mixing metal filler with molding materials is as shown in Figure 1, in which pre-made metal fibers or metal foil powder is pre-treated to make it compatible with the resin, and then mixed with the resin in a mixer. The materials are mixed, extruded using a granulator such as an extruder or kneader, and processed into pellets to be used as a molding material. In this case, it is extremely difficult to uniformly mix the conductive filler with the resin serving as the matrix due to the relationship between its original shape, dimensions, and specific gravity, and requires advanced technology.
成形材料に混合される導電性フイラーの最も好
ましい形状は、アスペクト比（繊維の歪と長さの
比）が大きく不織布状にランダム分散し層状でか
つ、海綿状に導電層を形成することで電磁波の透
過の少ない状態をつくり出すことである。そして
このような成形材料の開発が望まれている。 The most preferable shape of the conductive filler to be mixed into the molding material is that it has a large aspect ratio (the ratio of fiber strain to length) and is randomly dispersed and layered like a non-woven fabric, and forms a spongy conductive layer to prevent electromagnetic waves. The aim is to create a state in which there is less permeation. The development of such a molding material is desired.
本発明は、炭素繊維フイラーが均一に分散し、
可塑化も良好に行われる電磁波遮蔽効果のすぐれ
た成形材料の製造方法を提供することを目的とし
ている。
In the present invention, the carbon fiber filler is uniformly dispersed,
It is an object of the present invention to provide a method for producing a molding material that is well plasticized and has an excellent electromagnetic shielding effect.
本発明は前記の目的を達成するために鋭意検討
した結果、表面を金属メツキ又は金属蒸着で被膜
された炭素繊維からなるフイラメントでかつ、連
続して構成される束を導電性フイラーとし、前記
導電性フイラーが中心部となるようにマトリツク
スとなる合成樹脂を均一に被覆し、しかる後に任
意の長さに切断することを特徴とする導電性成形
材料の製造方法である。
As a result of intensive studies to achieve the above object, the present invention has been developed by using a conductive filler as a continuous bundle of filaments made of carbon fibers whose surfaces are coated with metal plating or metal vapor deposition. This method of producing a conductive molding material is characterized in that the synthetic resin serving as a matrix is uniformly coated with the conductive filler in the center, and then the conductive molding material is cut into arbitrary lengths.
本発明の導電性フイラーとして供される炭素繊
維のフイラメントは、連続的な長尺で、断面形状
が円であれば３〜10μφのものであるが必ずしも
断面形状が円でなく他の形状でもよく特に形状に
限定されるものではない。フイラメント束として
はフイラメント数が3000〜30000が望ましい。フ
イラメント数が3000未満では遮蔽効果が低く、又
30000を超えるとコスト高となつて好ましくない。
従つて上記範囲に限定される。フイラメント束を
中心部となるように被覆する合成樹脂は主に成形
容易の熱可塑性樹脂が多く用いられるが、エポキ
シ樹脂や不飽和ポリエステル樹脂等の熱硬化性樹
脂も用いることができる。 The carbon fiber filament used as the conductive filler of the present invention is a continuous long filament with a circular cross-sectional shape of 3 to 10 μφ, but the cross-sectional shape is not necessarily circular and may have other shapes. It is not particularly limited to the shape. The number of filaments in the filament bundle is preferably 3,000 to 30,000. If the number of filaments is less than 3000, the shielding effect is low, and
If it exceeds 30,000, the cost will be high and it is not desirable.
Therefore, it is limited to the above range. The synthetic resin that covers the filament bundle in the center is often an easily moldable thermoplastic resin, but thermosetting resins such as epoxy resins and unsaturated polyester resins can also be used.
炭素繊維フイラメント束に樹脂被覆をする方法
は、電線被覆等で行われているエクストルージヨ
ン、プルトルージヨン等公知の方法が十分採用さ
れる。 As a method for coating the carbon fiber filament bundle with resin, well-known methods such as extrusion and pultrusion, which are used for coating electric wires, etc., can be sufficiently employed.
合成樹脂を被覆後任意の長さ例えば３〜10mmに
切断することによつて効率よく、かつ、均質にペ
レツト化された導電性成形材料が得られる。この
際、合成樹脂被覆の厚さは炭素繊維フイラメント
束の径に対して２〜５倍程度の径が好ましい。 By coating the synthetic resin and cutting it into arbitrary lengths, for example, 3 to 10 mm, a conductive molding material that is efficiently and homogeneously pelletized can be obtained. At this time, the thickness of the synthetic resin coating is preferably about 2 to 5 times the diameter of the carbon fiber filament bundle.
本発明を図面を用いて具体的に説明する。 The present invention will be specifically explained using the drawings.
第２図に示すように、ニツケルメツキされた炭
素繊維フイラー（フイラメント径7μ、フイラメ
ント数12000本）を導電性フイラーとしてABS樹
脂をエクストルージヨンして被覆した。次いで
3φ×８mm程度に均一に切断ペレツト化して成形
材料を得た。この成形材料の断面は、第３図Ｃの
通り炭素繊維フイラーがペレツトのほぼ中心に位
置していた。この成形材料を射出成形して200mm
×200mm×3tのシートを成形し電磁波遮蔽効果を
測定したところ、1MHz〜1000MHz領域で30〜
65dBの効果があつた。 As shown in FIG. 2, a nickel-plated carbon fiber filler (filament diameter: 7 μm, number of filaments: 12,000) was extruded and coated with ABS resin as a conductive filler. then
A molding material was obtained by cutting uniformly into pellets of approximately 3φ x 8mm. In the cross section of this molding material, as shown in FIG. 3C, the carbon fiber filler was located approximately at the center of the pellet. Injection mold this molding material to 200mm
When we formed a sheet of x200mm x 3t and measured the electromagnetic wave shielding effect, we found that
The effect was 65dB.
本発明の製造方法による成形材料は、形状、サ
イズが均一化され炭素繊維フイラーが片より分散
したりせず、均質ペレツトが成形で可塑化される
場合、均一に解束され、炭素繊維フイラメントの
可塑化分散も良好に行われ、電磁波遮蔽効果が十
分発揮されるすぐれたものである。
The molding material produced by the production method of the present invention has a uniform shape and size, so that the carbon fiber filler does not disperse into pieces, and when a homogeneous pellet is plasticized by molding, it is uniformly unbundled and the carbon fiber filament is Plasticization and dispersion are also performed well, and the electromagnetic wave shielding effect is fully exhibited.
第１図は従来の導電性成形材料の製造工程を示
すフローシート、第２図は本発明の製造方法の一
例を示すフローシート、第３図はペレツトの断面
図を示す。
Ａ〜Ｂ……従来法によるペレツト、Ｃ……本発
明によるペレツト、１……樹脂、２……鱗片、粒
状、短繊維フイラー、３……炭素繊維フイラー
（フイラメント束）。
FIG. 1 is a flow sheet showing a conventional manufacturing process for a conductive molding material, FIG. 2 is a flow sheet showing an example of the manufacturing method of the present invention, and FIG. 3 is a sectional view of a pellet. A to B: Pellet according to conventional method, C: Pellet according to the present invention, 1: Resin, 2: Scale, granular, short fiber filler, 3: Carbon fiber filler (filament bundle).
Claims (1)
炭素繊維からなるフイラメントでかつ、連続して
構成される束を導電性フイラーとし、前記導電性
フイラーが中心部となるようにマトリツクスとな
る合成樹脂を均一に被覆し、しかる後任意の長さ
に切断することを特徴とする導電性成形材料の製
造方法。1 A filament made of carbon fiber whose surface is coated with metal plating or metal vapor deposition, and a continuous bundle is used as a conductive filler, and a synthetic resin that becomes a matrix is placed so that the conductive filler is in the center. A method for producing a conductive molding material, which comprises uniformly coating the material and then cutting it into a desired length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13204782A JPS5922710A (en) | 1982-07-30 | 1982-07-30 | Manufacture of electroconductive molding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13204782A JPS5922710A (en) | 1982-07-30 | 1982-07-30 | Manufacture of electroconductive molding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5922710A JPS5922710A (en) | 1984-02-06 |
| JPH0159884B2 true JPH0159884B2 (en) | 1989-12-20 |
Family
ID=15072272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13204782A Granted JPS5922710A (en) | 1982-07-30 | 1982-07-30 | Manufacture of electroconductive molding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922710A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602051A (en) * | 1983-09-07 | 1986-07-22 | Denki Kagaku Kogyo Kabushiki Kaisha | Resin composition having electromagnetic wave shielding effort |
| JPS60246507A (en) * | 1984-05-16 | 1985-12-06 | 旭フアイバ−グラス株式会社 | Conductive molding material and method of producing molding using same |
| JPS6129505A (en) * | 1984-07-23 | 1986-02-10 | Mitsui Petrochem Ind Ltd | Manufacture of master pellet for forming electromagnetic shielding material |
| US4960642A (en) * | 1986-04-17 | 1990-10-02 | The Furukawa Electric Co., Ltd. | Pellets for making electromagnetic wave shielding material and method for manufacturing the same |
| JPS6351109A (en) * | 1986-08-22 | 1988-03-04 | Toshiba Chem Corp | Electrically conducting resin composition |
| JPH0757489B2 (en) * | 1987-12-04 | 1995-06-21 | 株式会社日立製作所 | Method for producing conductive fiber composite resin |
| DE3806661A1 (en) * | 1988-03-02 | 1989-09-14 | Kabelmetal Electro Gmbh | METHOD FOR PRODUCING PLASTIC-REINFORCED OBJECTS FROM PLASTIC |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842034A (en) * | 1971-09-27 | 1973-06-19 | ||
| JPS4941105A (en) * | 1972-05-15 | 1974-04-17 | ||
| JPS5159944A (en) * | 1974-11-20 | 1976-05-25 | Daidoh Plant Eng | |
| JPS5190338A (en) * | 1975-02-06 | 1976-08-07 | ||
| JPS51100142A (en) * | 1975-03-01 | 1976-09-03 | Ube Nitto Kasei Co | Nijikakoyono senikyokanetsukasoseijushiseigenzairyo oyobi sonoseizohoho |
| JPS565717A (en) * | 1979-06-28 | 1981-01-21 | Aisin Seiki Co Ltd | Manufacturing of reinforced thermoplastic resin |
| JPS5765751A (en) * | 1980-10-08 | 1982-04-21 | Toray Ind Inc | Highly electrically conductive resin composition and electrically conductive resin molded product therefrom |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4963174U (en) * | 1972-09-13 | 1974-06-03 |
-
1982
- 1982-07-30 JP JP13204782A patent/JPS5922710A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842034A (en) * | 1971-09-27 | 1973-06-19 | ||
| JPS4941105A (en) * | 1972-05-15 | 1974-04-17 | ||
| JPS5159944A (en) * | 1974-11-20 | 1976-05-25 | Daidoh Plant Eng | |
| JPS5190338A (en) * | 1975-02-06 | 1976-08-07 | ||
| JPS51100142A (en) * | 1975-03-01 | 1976-09-03 | Ube Nitto Kasei Co | Nijikakoyono senikyokanetsukasoseijushiseigenzairyo oyobi sonoseizohoho |
| JPS565717A (en) * | 1979-06-28 | 1981-01-21 | Aisin Seiki Co Ltd | Manufacturing of reinforced thermoplastic resin |
| JPS5765751A (en) * | 1980-10-08 | 1982-04-21 | Toray Ind Inc | Highly electrically conductive resin composition and electrically conductive resin molded product therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5922710A (en) | 1984-02-06 |
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