CN104470344A - Electromagnetic shielding composite material and preparation method thereof - Google Patents
Electromagnetic shielding composite material and preparation method thereof Download PDFInfo
- Publication number
- CN104470344A CN104470344A CN201410802102.5A CN201410802102A CN104470344A CN 104470344 A CN104470344 A CN 104470344A CN 201410802102 A CN201410802102 A CN 201410802102A CN 104470344 A CN104470344 A CN 104470344A
- Authority
- CN
- China
- Prior art keywords
- layer
- compound
- electromagnetic shielding
- composite material
- resin
- 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
Abstract
The invention discloses an electromagnetic shielding composite material and a preparation method thereof. The electromagnetic shielding composite material comprises a matrix layer, an effective layer and a covering layer. The matrix layer is formed by a compound which comprises resin and surface modification conductive and/or magnetic conductive powder, and the conductive and/or magnetic conductive power are/is evenly dispersed in the resin. The effective layer is formed by conductive fiber fabric, the conductive fiber fabric is of a meshy structure, and a continuous conductive network is formed. The covering layer is made of conductive materials. The covering layer and the matrix layer are located on the upper surface and the lower surface of the effective layer respectively, and the matrix layer is in contact with a target object to be shielded. The electromagnetic shielding composite material has the advantages of being low in weight, excellent in shielding performance, good in mechanical strength and capable of achieving heat resistance.
Description
Technical field
The present invention relates to electromagnetic shielding material field, particularly relate to a kind of electromagnetic shielding composite material and preparation method thereof.
Background technology
Electromagnetic radiation and electromagnetic interference have a strong impact on national defense and military and people's lives, and thus electromagnetic shielding and absorbing material becomes the study hotspot of various countries.
Existing electromagnetic shielding material mainly comprises application type, structural type and compound three classes.Application type shielding material mainly refers to paste conductive foil or spraying conductive paint at product surface, and the shape of such material requirements goods can not be too complicated, and paste or spraying top layer in use easily wearing and tearing come off and lose function of shielding.Structural type electromagnetic shielding material mainly refers to metal and conducting polymer composite, and wherein, the effectiveness of metal shield materials is excellent, but proportion is relatively large.The composite material that compound shielding material mainly instructs electricity and/or magnetic conduction filler and macromolecule to be formed, wherein, conduction and/or magnetic conduction filler comprise such as metal system filler, burning system filler and carbon system filler.
In compound shielding material, metal system filler mainly comprises powder and fiber two type.Although the good conductivity of metal and oxide filler thereof, higher relative to carbon system its density of filler.When the addition of metal and oxide filler thereof is higher than critical value, the mechanical strength of electromagnetic shielding composite material can be subject to negative effect.Carbon system shielding filler mainly comprise powdery and fiber two kinds of forms, wherein the surface of fleut is because not easily disperseing containing a large amount of polar substances, and due to conductivity more weak, therefore need higher loading just can play the effect of electromagnetic shielding.
Summary of the invention
The object of the present invention is to provide that a kind of capability of electromagnetic shielding is excellent, quality is light, mechanical strength is good and there is the electromagnetic shielding composite material of thermal endurance.
An aspect of of the present present invention provides a kind of electromagnetic shielding composite material, described electromagnetic shielding composite material comprises: base layer, formed by compound, described compound comprises conduction and/or the magnetic conduction powder of resin and surface modification, and conduction and/or magnetic conduction powder are dispersed in resin; Have active layer, formed by conductive fibers, described conductive fibers has network structure, forms continuous print conductive network; Cover layer, is formed by electric conducting material, and wherein, on the upper surface that cover layer and base layer lay respectively at active layer and lower surface, base layer contacts with the object that will shield.
According to embodiments of the invention, described have active layer can also comprise the layer formed by the compound identical with the compound forming base layer, described have active layer can be constructed to multiple layer of being formed by conductive fibers and multiple layer formed by compound to be alternately layered between cover layer and base layer along the thickness direction of electromagnetic shielding material, and cover layer and base layer contact with the layer formed by conductive fibers respectively.
According to embodiments of the invention, described cover layer can be formed by the compound identical with the compound forming base layer, or described cover layer is formed by metal.
According to embodiments of the invention, described resin can be thermosetting resin or thermoplastic resin, and described conduction and/or magnetic conduction powder can comprise at least one in metal dust and metal oxide powder.
Another aspect of the present invention provides a kind of method preparing electromagnetic shielding composite material, and described method comprises: a. carries out surface modification to conduction and/or magnetic conduction powder; B. mix formation compound with resin according to the part by weight of 1:3 ~ 1:10 by through the conduction of surface modification and/or magnetic conduction powder, compound is laid in a mold; C. cancellated conductive fibers is had, to form continuous print conductive network in described compound upper berth setting tool; D. on described conductive fibers, lay cover layer, obtain composite material; E. by described composite material heating also molded curing shaping.
According to embodiments of the invention, described method can also comprise: repeatedly perform repeatedly step b and step c in order, to form alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers, described alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers as a whole, formed there is capability of electromagnetic shielding have active layer.
According to embodiments of the invention, described cover layer can be formed by the compound identical with the compound forming base layer, or described cover layer is formed by metal.
According to embodiments of the invention, described resin can be thermosetting resin or thermoplastic resin, and described conduction and/or magnetic conduction powder can comprise at least one in metal dust and metal oxide powder.
According to embodiments of the invention, when described resin is thermosetting resin, in stepb to conduction and/or magnetic conduction powder and resin compound in add curing agent.
According to embodiments of the invention, in step a, auxiliary agent can be utilized to carry out surface modification to conduction and/or magnetic conduction powder.
Electromagnetic shielding material can have at least one following advantage according to an embodiment of the invention:
1, compare with the shielding material adding merely metallic conductive fillers with metal, electromagnetic shielding material quality is lighter according to an embodiment of the invention;
2, with comprise short carbon fiber and compare with the shielding material of other conducting staple fibers, capability of electromagnetic shielding is more excellent according to an embodiment of the invention;
3, compared with adopting the shielding composite of other macromolecular materials, electromagnetic shielding composite material has good mechanical strength and thermal endurance according to an embodiment of the invention.
Accompanying drawing explanation
In conjunction with the drawings to the description of embodiment, above-mentioned and/or other characteristic sum aspects of the present invention will become clear and easy to understand.Hereinafter, except as otherwise noted, identical Reference numeral indicates identical element all the time, in the accompanying drawings:
Fig. 1 is the schematic cross sectional views of electromagnetic shielding composite material according to an embodiment of the invention;
Fig. 2 is the flow chart of the preparation method of electromagnetic shielding composite material according to an embodiment of the invention.
Embodiment
Below, embodiments of the invention are described in detail with reference to the accompanying drawings.But the present invention should not be understood to be confined to embodiment set forth herein, and being to provide these embodiments, to make of the present invention be openly thoroughly with complete, and scope of the present invention is fully conveyed to those skilled in the art.
Fig. 1 is the schematic cross sectional views of electromagnetic shielding composite material according to an embodiment of the invention.
As shown in Figure 1, electromagnetic shielding composite material comprises according to an embodiment of the invention: base layer 10, formed by compound, described compound comprises conduction and/or the magnetic conduction powder 12 of resin 11 and surface modification, and conduction and/or magnetic conduction powder 12 are dispersed in resin 11; Have active layer 20, comprise conductive fibers 21, described conductive fibers 21 has network structure, forms continuous print conductive network; Cover layer 30, is formed by electric conducting material, and wherein, on the upper surface that cover layer 30 and base layer 10 lay respectively at active layer 20 and lower surface, base layer 10 contacts with the object that will shield.
According to the present invention, the base layer 10 being made of resin electromagnetic shielding composite material can be made.Resin has the advantages that quality is light, be easy to machine-shaping, therefore, resin can be applied to electronic equipment to replace traditional metal shell.But due to macromolecular material insulator often itself, the resistivity of pure resin is very large, does not substantially have shielding action to electromagnetic radiation.Therefore, in the present invention, use conduction and/or magnetic conduction powder and mixed with resin to form compound, thus conductive modified is carried out to resin material, improve resin matrix to shielding electromagnetic waves performance.
In the present embodiment, base layer 10 is formed by compound, described compound comprises resin 11 and conduction and/or magnetic conduction powder 12, and conduction and/or magnetic conduction powder 12 are evenly dispersed in resin 11, and this structure makes the resistivity of compound have with pure resin-phase ratio significantly to reduce.Conduction and/or magnetic conduction powder 12 give base layer 10 electric conductivity, make electromagnetic wave when base layer 10 order of reflection increase, electromagnetic order of reflection is more, reflection loss and absorption loss larger.When utilizing the compound with this structure form base layer 10 and make base layer 10 contact with the object that will shield, this electromagnetic shielding composite material can show excellent effectiveness.
According to embodiments of the invention, resin 11 can be thermosetting resin or thermoplastic resin, and the weight percentage of resin can account for 50% ~ 90% of electromagnetic shielding composite material total weight.Resin 11 can comprise at least one in epoxy resin, phenolic resins, polyurethane, melamine, polyimides, polyamide, polyacetylene etc.In one embodiment, because epoxy resin is closely knit, strong adhesion there is good radiation resistance, thus become preferred resin.
According to embodiments of the invention, conduction and/or magnetic conduction powder 12 can comprise at least one in metal dust and metal oxide powder, wherein, metal dust can be at least one selected from copper powder, nickel powder, silver powder, iron powder and aluminium powder etc., and metal oxide powder can be at least one selected from ferriferous oxide, nickel oxide and zinc oxide etc.In one embodiment, because aluminium powder quality is light and have excellent electric conductivity and the price of relative moderate, thus become preferred.
In the present embodiment, there is active layer 20 to be coated to cap rock 30 and base layer 10 is clamped in centre, form the three-decker being similar to " sandwich ".Active layer 20 is had to comprise conductive fibers 21, wherein, conductive fibers 21 has network structure, such as, this network structure can have plain weave or twill, this conductive fibers can be one-way fabric or bidirectional fabric, and wherein, the capability of electromagnetic shielding with the conductive fibers of the two-way braiding of twill is better.The network structure of conductive fibers can form continuous print conductive network, plays and increases the bulk strength of electromagnetic shielding composite material and the effect of electric conductivity, and can improve electromagnetic assimilation effect.
Prior art usually adopts elongated conductive fiber, the conductive fiber prescinded or adopts long fibre and short fiber as packing material to form composite material simultaneously, and thus the fibr tissue of filler is structure independent of each other, does not form the network interweaved.By contrast, composite material due to embodiments of the invention adopts cancellated conductive fibers, define the conductive network structure interweaved continuously, this continuous conduction network configuration not only can significantly improve capability of electromagnetic shielding, can also make the further slimming of composite material, lightly change.According to embodiments of the invention, conductive fibers can be at least one in carbon fibre fabric, metallized fibre fabric and metallized glass fabric.In one embodiment, conductive fibers is preferably two-way carbon fibre fabric.
Because the weight of different types of resin or conductive fibers is different with thickness, therefore according to an embodiment of the invention electromagnetic shielding composite material base layer 10, have the thickness of active layer 20 and cover layer 30 can decide according to concrete composition material and the capability of electromagnetic shielding that will obtain.In addition, consider the overall portability of electromagnetic shielding composite material of the present invention, the active layer 20 that has of the present embodiment can only include the conductive fibers of individual layer; But, the present invention is not limited thereto, the desired capability of electromagnetic shielding reached can be provided with active layer 20.
Such as, when the electromagnetic radiation that will shield is stronger, electromagnetic shielding composite material can contain multilayer conductive fabric 21.In this case, according to embodiments of the invention, there is active layer 20 can also comprise the compound identical with the compound forming base layer 10, and having active layer 20 to be constructed to multiple layer of being formed by compound and multiple layer formed by conductive fibers is alternately layered between cover layer 30 and base layer 10 along the thickness direction of electromagnetic shielding material, and cover layer 30 contacts with the layer formed by conductive fibers 21 respectively with base layer 10.Now, the compound formed with conduction and/or magnetic conduction powder 12 by resin 11 is comprised between each layer conductive fibers 21, because resin 11 has certain caking property after heating, therefore can ensure to there is certain adhesion strength between multiple layer of being formed by conductive fibers 21 and multiple layer formed by compound, thus make the electromagnetic shielding composite material of embodiments of the invention entirety have good mechanical strength and capability of electromagnetic shielding concurrently.
In the present embodiment, cover layer 30 is formed by electric conducting material.In one embodiment, cover layer 30 can be formed by metal, such as, and Copper Foil.But in another embodiment, cover layer 30 also can be formed by the compound identical with the compound forming base layer 10.In this case, cover layer 30 can have the electromagnetic shielding character identical with base layer 10, and therefore the upper surface of electromagnetic shielding composite material all can contact with the object that will shield with lower surface.That is, electromagnetic shielding composite material can be placed between two or more objects that will shield.
In the present embodiment, conduction and/or magnetic conduction powder 12 are through the material of surface modification.The object of surface modification is the affinity improving powder and resin, avoids powder agglomeration or agglomerating simultaneously, powder can be evenly dispersed in resin, thus improve the overall capability of electromagnetic shielding of electrically conductive composite.
Therefore, compare with the shielding material adding merely metallic conductive fillers with metal, electromagnetic shielding material quality is lighter according to an embodiment of the invention; With comprise short carbon fiber and compare with the shielding material of other conducting staple fibers, capability of electromagnetic shielding is more excellent according to an embodiment of the invention; Compared with adopting the shielding composite of other macromolecular materials, electromagnetic shielding composite material has good mechanical strength and thermal endurance according to an embodiment of the invention.
Hereinafter, composition graphs 2 is described in detail the preparation method of electromagnetic shielding composite material according to an embodiment of the invention.Fig. 2 is the flow chart of the preparation method of electromagnetic shielding composite material according to an embodiment of the invention.
As shown in Figure 2, the method preparing electromagnetic shielding composite material according to an embodiment of the invention comprises the following steps: a. utilizes auxiliary agent to carry out surface modification (S10) to conduction and/or magnetic conduction powder; B. mix to form compound according to the part by weight of 1:3 ~ 1:10 with resin by through the conduction of surface modification and/or magnetic conduction powder, compound is laid in a mold (S20); C. cancellated conductive fibers is had in described compound upper berth setting tool, to form continuous print conductive network (S30); D. on described conductive fibers, form cover layer, obtain composite material (S40); E. by described composite material heating also molded curing shaping, thus obtain according to electromagnetic shielding composite material of the present invention (S50).
In step slo, surface modification is carried out to conduction and/or magnetic conduction powder.The affinity improving conduction and/or magnetic conduction powder and resin is to the object of conduction and/or magnetic conduction powder surface modification, avoid conduction and/or magnetic conduction powder agglomeration or agglomerating simultaneously, to guarantee that conduction and/or magnetic conduction powder can be evenly dispersed in resin, improve the overall capability of electromagnetic shielding of electrically conductive composite.If not actuating surface modification, conduction and/or magnetic conduction powder will produce with resin and be separated phase, thus cannot form conductive path, affect the shielding properties of composite material.According to embodiments of the invention, chemical method can be utilized to carry out actuating surface modification by adding auxiliary agent, can according to conduction and/or magnetic conduction powder weight about 1% amount add auxiliary agent.But the present invention is not limited thereto, any surface modifying method that can contribute to the dispersing uniformity improving powder-resin complexes may be used to conduction of the present invention and/or magnetic conduction powder.
In one embodiment, conduction and/or magnetic conduction powder can comprise at least one in metal dust and metal oxide powder, auxiliary agent for surface modification can be coupling agent, and coupling agent can be the one selected from silane coupler, titanate coupling agent or aluminate coupling agent.Preferably, coupling agent can be the silane coupler of such as amino silicane coupling agent.
In step S20, mix formation compound with resin according to the part by weight of 1:3 ~ 1:10 by through the conduction of surface modification and/or magnetic conduction powder, then compound is laid in a mold.
In one embodiment, when resin is thermosetting resin, also need to add curing agent in the compound of resin and conduction and/or magnetic conduction powder.In this case, the composition of compound can comprise by weight percentage the thermosetting resin of about 50% ~ 90%, the curing agent of about 5% ~ 10% and about 10% ~ 30% conduction and/or magnetic conduction powder, then compound to be laid in a mold.
In another embodiment, when resin is thermoplastic resin, need not curing agent be added, the thin slice with certain apparent size can be extruded or be molded into the thermoplastic resin mixed and conduction and/or magnetic conduction powder, then thin slice is laid in a mold.
In step s 30, cancellated conductive fibers is had, to form continuous print conductive network in the compound upper berth setting tool that step S20 obtains.
In one embodiment, only one deck conductive fibers is laid.But, multilayer conductive fabric can also be laid according to the capability of electromagnetic shielding expecting to obtain.In this case, repeatedly perform step S20 and step S30 many times, to form alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers, described alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers as a whole, formed there is capability of electromagnetic shielding have active layer.
In step s 40, conductive fibers forms cover layer.
In one embodiment, cover layer can be formed by metal.Such as, Copper Foil can be laid on conductive fibers as cover layer.In another embodiment, cover layer can be formed by the compound identical with the compound formed in step 20, such as, can be in step s 40, mix to form compound according to the part by weight of 1:3 ~ 1:10 with resin by through the conduction of surface modification and/or magnetic conduction powder by performing step S20, then compound is laid on conductive fibers as cover layer.
Finally perform step S50, closed die, the composite material that These steps is formed is heated under certain temperature and pressure and molded curing shaping.
Below, the concrete example of electromagnetic shielding composite material prepared by the preparation method being described through embodiments of the invention and the testing result of capability of electromagnetic shielding.
example 1
Under room temperature, take 3g amino silicane coupling agent and 200g absolute ethyl alcohol is mixed with alcoholic solution.Taking 100g Al powder adds in the alcoholic solution of amino silicane coupling agent, to Al powder surface modification, adopts magnetic stirrer to filter after 30 minutes, grinds stand-by at 130 DEG C after dry 10min.
Al powder after 15g surface modification is added in 15g glycerine ethers diluent, and adds 0.03g defoamer.After stirring, add 100g epoxy resin, and add 10g curing agent and stir.
Under room temperature, the mixing material of above-mentioned for 50g Al powder and epoxy resin is imported in the counterdie of mould, then carbon fibre fabric is layered on mixing material, then the mixing material of above-mentioned for 50g Al powder and epoxy resin is directed on carbon fibre fabric.Closed die, rises to 130 DEG C to make resin solidification with the programming rate of 5 DEG C/min by mold temperature.After treating 60min, by mold cools down to room temperature, open mould and take out goods, thus obtain sample 1.
The resistance recording sample 1 is 9.80 Ω cm.
example 2
Under room temperature, take 3g amino silicane coupling agent and 200g absolute ethyl alcohol is mixed with alcoholic solution.Taking 100g Al powder adds in the alcoholic solution of amino silicane coupling agent, to Al powder surface modification, adopts magnetic stirrer to filter after 30 minutes, grinds stand-by at 130 DEG C after dry 10min.
Al powder after 10g surface modification is added in 10g glycerine ethers diluent, and adds 0.03g defoamer.After stirring, add 100g epoxy resin, and add 10g curing agent and stir.
Under room temperature, the mixing material of above-mentioned for 50g Al powder and epoxy resin is imported in the counterdie of mould, then carbon fibre fabric is layered on mixing material, then the mixing material of above-mentioned for 50g Al powder and epoxy resin is directed on carbon fibre fabric.Closed die, rises to 130 DEG C to make resin solidification with the programming rate of 5 DEG C/min by mold temperature.After treating 60min, by mold cools down to room temperature, open mould and take out goods, thus obtain sample 2.
The resistance recording sample 2 is 21.05 Ω cm.
example 3
Under room temperature, take 3g amino silicane coupling agent and 200g absolute ethyl alcohol is mixed with alcoholic solution.Taking 100g Al powder adds in the alcoholic solution of amino silicane coupling agent, to Al powder surface modification, adopts magnetic stirrer to filter after 30 minutes, grinds stand-by at 130 DEG C after dry 10min.
Al powder after 25g surface modification is added in 25g glycerine ethers diluent, and adds 0.03g defoamer.After stirring, add 100g epoxy resin, and add 10g curing agent and stir.
Under room temperature, the mixing material of above-mentioned for 50g Al powder and epoxy resin is imported in the counterdie of mould, then carbon fibre fabric is layered on mixing material, then the mixing material of above-mentioned for 50g Al powder and epoxy resin is directed on carbon fibre fabric.Closed die, rises to 130 DEG C to make resin solidification with the programming rate of 5 DEG C/min by mold temperature.After treating 60min, by mold cools down to room temperature, open mould and take out goods, thus obtain sample 3.
The resistance recording sample 3 is 9.76 Ω cm.
Can find out according to above-mentioned example, obtained electromagnetic shielding composite material resistance is all less, and the less expression shield effectiveness of resistance value is better.Owing to defining continuous print conductive network having in active layer, and the compound be made up of resin and conduction and/or magnetic conduction powder has good electric conductivity, makes composites according to the present invention have excellent capability of electromagnetic shielding.
In sum, electromagnetic shielding composite material and preparation method thereof can form continuous print conductive network having in active layer according to an embodiment of the invention, and the base layer be made up of the compound that electric conductivity is good can be formed, thus improve the overall capability of electromagnetic shielding of composite material.Obtained electromagnetic shielding composite material and existing composite material phase specific mass gentlier, the more excellent and mechanical strength of capability of electromagnetic shielding and thermal endurance better.
Although describe the present invention in conjunction with exemplary embodiment, without departing from the spirit and scope of the present invention, those skilled in the art can make a variety of changes and revise, and protection scope of the present invention is as the criterion with the restriction of claims.
Claims (10)
1. an electromagnetic shielding composite material, described electromagnetic shielding composite material comprises:
Base layer, is formed by compound, and described compound comprises conduction and/or the magnetic conduction powder of resin and surface modification, and conduction and/or magnetic conduction powder are dispersed in resin;
Have active layer, formed by conductive fibers, described conductive fibers has network structure, forms continuous print conductive network;
Cover layer, is formed by electric conducting material,
Wherein, on the upper surface that cover layer and base layer lay respectively at active layer and lower surface, base layer contacts with the object that will shield.
2. electromagnetic shielding composite material according to claim 1, wherein, described have active layer also to comprise the layer formed by the compound identical with the compound forming base layer, described have active layer to be constructed to multiple layer of being formed by conductive fibers and multiple layer formed by compound to be alternately layered between cover layer and base layer along the thickness direction of electromagnetic shielding material, and cover layer and base layer contact with the layer formed by conductive fibers respectively.
3. electromagnetic shielding composite material according to claim 1, wherein, described cover layer is formed by the compound identical with the compound forming base layer, or described cover layer is formed by metal.
4. electromagnetic shielding composite material according to claim 1, wherein, described resin is thermosetting resin or thermoplastic resin,
Wherein, described conduction and/or magnetic conduction powder comprise at least one in metal dust and metal oxide powder.
5. prepare a method for electromagnetic shielding composite material, described method comprises:
A. surface modification is carried out to conduction and/or magnetic conduction powder;
B. mix formation compound with resin according to the part by weight of 1:3 ~ 1:10 by through the conduction of surface modification and/or magnetic conduction powder, compound is laid in a mold;
C. cancellated conductive fibers is had, to form continuous print conductive network in described compound upper berth setting tool;
D. on described conductive fibers, lay cover layer, obtain composite material;
E. by described composite material heating also molded curing shaping.
6. method according to claim 5, described method also comprises:
Repeatedly perform step b and step c many times in order, to form alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers, described alternately laminated multiple layer of being formed by compound and multiple layer formed by conductive fibers as a whole, formed there is capability of electromagnetic shielding have active layer.
7. electromagnetic shielding composite material according to claim 5, wherein, described cover layer is formed by the compound identical with the compound forming base layer, or described cover layer is formed by metal.
8. electromagnetic shielding composite material according to claim 5, wherein, described resin is thermosetting resin or thermoplastic resin,
Wherein, described conduction and/or magnetic conduction powder comprise at least one in metal dust and metal oxide powder.
9. method according to claim 5, wherein, when described resin is thermosetting resin, in stepb to conduction and/or magnetic conduction powder and resin compound in add curing agent.
10. method according to claim 5, wherein, in step a, utilizes auxiliary agent to carry out surface modification to conduction and/or magnetic conduction powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802102.5A CN104470344A (en) | 2014-12-17 | 2014-12-17 | Electromagnetic shielding composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802102.5A CN104470344A (en) | 2014-12-17 | 2014-12-17 | Electromagnetic shielding composite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104470344A true CN104470344A (en) | 2015-03-25 |
Family
ID=52915471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410802102.5A Pending CN104470344A (en) | 2014-12-17 | 2014-12-17 | Electromagnetic shielding composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104470344A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235210A (en) * | 2015-09-25 | 2016-01-13 | 深圳市博恩实业有限公司 | Electrically conductive composite capable of being printed through 3D printing and 3D printing forming method |
| CN106231885A (en) * | 2016-08-13 | 2016-12-14 | 深圳市超梦智能科技有限公司 | Guidance path display packing |
| CN108513524A (en) * | 2018-04-18 | 2018-09-07 | 成都联腾动力控制技术有限公司 | A kind of New-energy electric vehicle high-strength magnetic shielding material and preparation method thereof |
| CN105555112B (en) * | 2016-01-22 | 2018-09-18 | 武汉理工大学 | A kind of electromagnetic shielding composite material |
| CN109526159A (en) * | 2018-10-22 | 2019-03-26 | 江苏银泰电气科技有限公司 | A kind of composite board for power distribution cabinet |
| CN110089208A (en) * | 2016-12-13 | 2019-08-02 | 阿莫绿色技术有限公司 | Flexible electromagnetic shielding material, including its electromagnetic wave shielding type circuit module and have its electronic equipment |
| CN112689925A (en) * | 2018-07-05 | 2021-04-20 | 佛吉亚排气系统有限公司 | Composite electromagnetic shielding plate, battery envelope comprising such composite electromagnetic shielding plate and method for manufacturing such composite electromagnetic shielding plate |
| CN113334878A (en) * | 2021-05-27 | 2021-09-03 | 中国辐射防护研究院 | Sandwich-like structure ionizing radiation flexible shielding material and preparation method thereof |
| CN114261036A (en) * | 2021-12-22 | 2022-04-01 | 中国科学院宁波材料技术与工程研究所 | Thermoplastic electromagnetic shielding prepreg, preparation method and prepared composite material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090084A (en) * | 1992-12-16 | 1994-07-27 | 李龙仁 | A kind of conductive tape that is used for the conductive basal layer of belt and adopts this basalis |
| CN1355670A (en) * | 1994-01-20 | 2002-06-26 | 株式会社东金 | Electromagnetic interference rejection body of low electromagnetic penetrability and reflectivity and its electronic device |
| US20040018375A1 (en) * | 2002-07-05 | 2004-01-29 | Koji Banno | Transparent electromagnetic wave-shielding laminate for display, process for producing same and display unit |
| CN1723748A (en) * | 2003-03-25 | 2006-01-18 | 信越聚合物株式会社 | Electromagnetic noise suppressor, article with electromagnetic noise suppression function, and their manufacturing methods |
| CN201174256Y (en) * | 2008-03-24 | 2008-12-31 | 山东天诺光电材料有限公司 | Electricity conductive shielding fabric |
| CN101362390A (en) * | 2008-09-28 | 2009-02-11 | 北京理工大学 | Wide band electromagnetic wave-shielded polyethylene compound film containing carbonyl iron powder and preparation method thereof |
| CN103465526A (en) * | 2013-09-18 | 2013-12-25 | 江南大学 | Flexible electromagnetic screen composite material |
| CN103467937A (en) * | 2013-09-22 | 2013-12-25 | 江苏启弘新材料科技有限公司 | Wave-absorbing radiation-resistant functional master batches and preparation method thereof |
-
2014
- 2014-12-17 CN CN201410802102.5A patent/CN104470344A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1090084A (en) * | 1992-12-16 | 1994-07-27 | 李龙仁 | A kind of conductive tape that is used for the conductive basal layer of belt and adopts this basalis |
| CN1355670A (en) * | 1994-01-20 | 2002-06-26 | 株式会社东金 | Electromagnetic interference rejection body of low electromagnetic penetrability and reflectivity and its electronic device |
| US20040018375A1 (en) * | 2002-07-05 | 2004-01-29 | Koji Banno | Transparent electromagnetic wave-shielding laminate for display, process for producing same and display unit |
| CN1723748A (en) * | 2003-03-25 | 2006-01-18 | 信越聚合物株式会社 | Electromagnetic noise suppressor, article with electromagnetic noise suppression function, and their manufacturing methods |
| CN201174256Y (en) * | 2008-03-24 | 2008-12-31 | 山东天诺光电材料有限公司 | Electricity conductive shielding fabric |
| CN101362390A (en) * | 2008-09-28 | 2009-02-11 | 北京理工大学 | Wide band electromagnetic wave-shielded polyethylene compound film containing carbonyl iron powder and preparation method thereof |
| CN103465526A (en) * | 2013-09-18 | 2013-12-25 | 江南大学 | Flexible electromagnetic screen composite material |
| CN103467937A (en) * | 2013-09-22 | 2013-12-25 | 江苏启弘新材料科技有限公司 | Wave-absorbing radiation-resistant functional master batches and preparation method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235210A (en) * | 2015-09-25 | 2016-01-13 | 深圳市博恩实业有限公司 | Electrically conductive composite capable of being printed through 3D printing and 3D printing forming method |
| CN105555112B (en) * | 2016-01-22 | 2018-09-18 | 武汉理工大学 | A kind of electromagnetic shielding composite material |
| CN106231885A (en) * | 2016-08-13 | 2016-12-14 | 深圳市超梦智能科技有限公司 | Guidance path display packing |
| CN106231885B (en) * | 2016-08-13 | 2018-12-14 | 深圳市超梦智能科技有限公司 | Guidance path display methods |
| CN110089208A (en) * | 2016-12-13 | 2019-08-02 | 阿莫绿色技术有限公司 | Flexible electromagnetic shielding material, including its electromagnetic wave shielding type circuit module and have its electronic equipment |
| CN110089208B (en) * | 2016-12-13 | 2021-02-26 | 阿莫绿色技术有限公司 | Flexible electromagnetic wave shielding material, electromagnetic wave shielding circuit module, and electronic device |
| CN108513524A (en) * | 2018-04-18 | 2018-09-07 | 成都联腾动力控制技术有限公司 | A kind of New-energy electric vehicle high-strength magnetic shielding material and preparation method thereof |
| CN112689925A (en) * | 2018-07-05 | 2021-04-20 | 佛吉亚排气系统有限公司 | Composite electromagnetic shielding plate, battery envelope comprising such composite electromagnetic shielding plate and method for manufacturing such composite electromagnetic shielding plate |
| CN109526159A (en) * | 2018-10-22 | 2019-03-26 | 江苏银泰电气科技有限公司 | A kind of composite board for power distribution cabinet |
| CN113334878A (en) * | 2021-05-27 | 2021-09-03 | 中国辐射防护研究院 | Sandwich-like structure ionizing radiation flexible shielding material and preparation method thereof |
| CN114261036A (en) * | 2021-12-22 | 2022-04-01 | 中国科学院宁波材料技术与工程研究所 | Thermoplastic electromagnetic shielding prepreg, preparation method and prepared composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104470344A (en) | Electromagnetic shielding composite material and preparation method thereof | |
| CN101085842A (en) | Method for preparing electromagnetic shielding plastic master batch and composite plastic | |
| Singh et al. | Nanocomposites based on transition metal oxides in polyvinyl alcohol for EMI shielding application | |
| CN100405886C (en) | Polyethylene composite film for shielding wideband electromagnetic wave and its preparing method | |
| KR20200105625A (en) | Composite material for shielding electromagnetic radiation, raw material for additive manufacturing methods and a product comprising the composite material as well as a method of manufacturing the product | |
| CN104371271A (en) | New corrosion resistant composite wave absorbing material | |
| CN106916450A (en) | A kind of electromagnetic wave absorption thermally conductive composition and electromagnetic wave absorption heat-conducting pad | |
| CN103483792A (en) | Wave absorption and radiation protection plastic and preparation method thereof | |
| CN107912012A (en) | A kind of electromagnetic wave shielding/absorption composite paster and preparation method thereof | |
| Evans | Design guidelines for shielding effectiveness, current carrying capability, and the enhancement of conductivity of composite materials | |
| CN102675848A (en) | Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application | |
| TW201729994A (en) | Electromagnetic wave absorption laminated body, case body and method of using electromagnetic wave absorption laminated body | |
| CN106042564B (en) | A kind of lightweight sandwich absorbing material and preparation method thereof | |
| CN103304910A (en) | High-strength polystyrene conductive plastic and preparation method thereof | |
| Kim et al. | Electromagnetic interference shielding characteristics for orientation angle and number of plies of carbon fiber reinforced plastic | |
| CN109468841A (en) | A kind of wave absorbing agent solution and honeycomb absorbing material and preparation method thereof | |
| CN110358253A (en) | For producing the composite material and preparation method of railway signal tank unit housings | |
| Razak et al. | Polyaniline-coated kenaf core and its effect on the mechanical and electrical properties of epoxy resin | |
| CN101155504B (en) | Composite plastics for shielding electromagnetic radiation and use thereof | |
| Anaele Opara et al. | Progress in Polymer-based Composites as Efficient Materials for Electromagnetic Interference Shielding Applications: A Review | |
| CN114106377A (en) | Thermosetting electromagnetic shielding prepreg, preparation method and prepared composite material | |
| KR101124544B1 (en) | Halogen free multiple sheet with electromagnetic wave absorption and in-plane thermal conduction, and manufacturing method thereof | |
| Simitzis et al. | Electrical conductivity and mechanical strength of composites consisting of phenolic resin, carbon fibers, and metal particles | |
| KR19990012192A (en) | Resin Composition for Electromagnetic Shielding | |
| JPS60189105A (en) | Conductive molding material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
|
| RJ01 | Rejection of invention patent application after publication |