CN202095244U - Absorption-reflection integrated electromagnetic shielding layer - Google Patents
Absorption-reflection integrated electromagnetic shielding layer Download PDFInfo
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- CN202095244U CN202095244U CN2011201920652U CN201120192065U CN202095244U CN 202095244 U CN202095244 U CN 202095244U CN 2011201920652 U CN2011201920652 U CN 2011201920652U CN 201120192065 U CN201120192065 U CN 201120192065U CN 202095244 U CN202095244 U CN 202095244U
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Abstract
The utility model discloses an absorption-reflection integrated electromagnetic shielding layer, which comprises a high conductivity reflection layer and a heavy loss absorption layer. The surfaces of the two sides of the high conductivity reflection layer are both magnesium phenolic resin layers; an aluminized glass fiber layer is filled between the magnesium phenolic resin layers at the two sides; the bottom layer of the heavy loss absorption layer is an alloy powder layer; the middle layer of the heavy loss absorption layer is a dielectric constant intermediate layer; and the surface layer of the heavy loss absorption layer is a W-shaped ferrite. The absorption-reflection integrated electromagnetic shielding layer is combined and derived by adopting double (multiple) shielding layer composite materials through a plurality of shielding mechanisms, has positive effects both on the shielding efficiency of the shielding material and anti-frequency width; and the purposes of high efficiency and wide frequency range as well as massively eliminated secondary clutter can be simultaneously achieved by reasonably adjusting each layer of electromagnetic parameters of the shielding material.
Description
Technical field
The utility model relates to a kind of electromangnetic spectrum, particularly a kind of absorption reflection integrated electromagnetic screen.
Background technology
Electromagnetic technique is a double-edged sword, and the utilization of electromagnetic technique brings easily simultaneously to people, and extensive use high-power, highly integrated electric installation has but caused such as electromagnetic interference, electromagnetism divulges a secret and a series of safety and environmental problem such as electromagnetic pollution.Though traditional reflective shielding material can reach higher screening effectiveness, this class material is to utilize good conductivity that electromagnetic wave is carried out reflex, with energy constraint in the specific region, not with effective energy transformation.When weakening a regional field intensity, will certainly increase other regional field intensity like this, when serious even cause resonance, influence utilization.
The utility model content
Technical problem to be solved in the utility model provides a kind of absorption reflection integrated electromagnetic screen.
For solving the problems of the technologies described above, the following mode of the utility model realizes: a kind of absorption reflection integrated electromagnetic screen comprises that high electricity leads reflector and lossy absorbed layer; The top layer, both sides of described high conductive reflective is magnesium phenolic resins layer, and the aluminium-coated glass-fibre layer is filled between the magnesium phenolic resins layer of both sides; The bottom of described lossy absorbed layer is that alloy powder layer, intermediate layer are that dielectric constant transition zone, top layer are the W type ferrite.
Good effect of the present utility model is: absorb reflection integrated electromagnetic screen adopt two (many) screens composite materials by multiple shielding mechanism combination and derive, screening effectiveness and antagonism frequency range to shielding material all have positive effect, by reasonable adjusting, can reach high-effect, wideband section simultaneously and eliminate the purpose of secondary clutter in a large number each layer of shielding material electromagnetic parameter.
Description of drawings
Fig. 1 is the structural representation of an absorption that embodiment provided reflection integrated electromagnetic screen of the present utility model;
Fig. 2 is the structural representation that a high electricity that embodiment provided of the present utility model is led the reflector;
Fig. 3 is the structural representation of a lossy absorbed layer that embodiment provided of the present utility model;
Wherein: 1 high electricity is led reflector 2 lossy absorbed layers, 3 magnesium phenolic resins layers, 4 aluminium-coated glass-fibre layer, 5 alloy powder layer, 6 dielectric constant transition zone 7W type ferrite layers
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, absorption that embodiment provided of the utility model reflection integrated electromagnetic screen comprises that high electricity leads reflector (1) and lossy absorbed layer (2).High conductive reflective (1) comprises magnesium phenolic resins layer (3) and aluminium-coated glass-fibre layer (4).Wherein, the top layer, both sides of high conductive reflective (1) is a magnesium phenolic resins layer (3), aluminium-coated glass-fibre is filled between the magnesium phenolic resins layer of both sides becomes aluminium-coated glass-fibre layer (4), forms the three-system structure of " magnesium phenolic resins layer-aluminium-coated glass-fibre layer-magnesium phenolic resins layer ".Lossy absorbed layer (2) comprises alloy powder layer (5), dielectric constant transition zone (6) and W type ferrite layer (7), wherein, alloy powder layer (5) is a bottom, dielectric constant transition zone (6) (is a composite absorber, alloyed powder content 25%) be the intermediate layer, W type ferrite layer (7) is the top layer, and its gross thickness is 1.8mm.
One, the preparation process of high conductive reflective is as follows:
1, choosing solid content is 60% magnesium phenolic resins, the dilution of 10% acetone soln (can not be excessive, otherwise produce flocculent undissolved substance); The length of aluminium-coated glass-fibre need be cut into 40mm.Temperature remains on 165 ℃, and pressure remains on 20MPa, and duration of the reaction is determined according to the thickness of pressed material, is generally 2.3min/mm.
2, an amount of magnesium phenolic resins is poured onto in the beaker of 250ml, pours 10% acetone soln of half magnesium phenolic resins volume then in this beaker into, stir while topple over.
3, with neat being positioned in the porcelain alms bowl of aluminium-coated glass-fibre, in alms bowl, pour resin solution again into,, pour a little acetone soln again into while topple over when being stirred to mixture viscosity and becoming big.
The fiber-resin system mixture that 4, will mix places fume hood, makes liquid solvent volatilizations such as acetone in the system and water, this process need 72 hours.
5, mould heats up, and temperature is transferred to 180 ℃.In the temperature-rise period, seaming chuck is submerged among the cylinder sleeve.
6, mixed material is divided into 4cm
2Sheet after put into mould pressing cavity, whole process should be carried out rapidly.
7, start press and observe Pressure gauge, to be shownly pick up counting when pressure is arranged, first coarse adjustment pressure keeps this pressure by the fine setting button then comparatively accurately to 20Mpa; Along with the carrying out of reaction, show that pressure can descend to some extent, should be by the timely supplementary pressure of fine setting.
8, after question response finishes, cut off the heat supply power supply, still keep-up pressure and wait for that sample temperature reduces the back and takes out sample.
Two, the preparation process of lossy absorbed layer and high conductive reflective are approximate, and the difference part is that the lossy absorbed layer does not need accurately to cut out silk, but needs process mixing and sulfuration, and the two is all finished in instrument automatically.
Wherein, the mass ratio of W type ferrite layer and dielectric constant transition zone is 5: 1, and thickness is 2mm-2.5mm.The mass ratio of alloy powder layer and dielectric constant transition zone can be divided into two grades: one is 4: 1, and material thickness is more than the 1.5mm; Two is 5: 1, material thickness be 1.5mm once.As single absorbed layer, the alloyed powder mass ratio be 5: 1 better; Add transition zone as absorbed layer, then use 4: 1 better.
Absorb reflection integrated electromagnetic screen adopt two (many) screens composite materials by multiple shielding mechanism combination and derive, screening effectiveness and antagonism frequency range to shielding material all have positive effect, by reasonable adjusting, can reach high-effect, wideband section simultaneously and eliminate the purpose of secondary clutter in a large number each layer of shielding material electromagnetic parameter.
Claims (2)
1. one kind absorbs reflection integrated electromagnetic screen, it is characterized in that: comprise that high electricity leads reflector and lossy absorbed layer; The top layer, both sides of described high conductive reflective is magnesium phenolic resins layer, and the aluminium-coated glass-fibre layer is filled between the magnesium phenolic resins layer of both sides; The bottom of described lossy absorbed layer is that alloy powder layer, intermediate layer are that dielectric constant transition zone, top layer are the W type ferrite.
2. absorption reflection integrated electromagnetic screen as claimed in claim 1, it is characterized in that: the thickness of described integrated electromagnetic screen is 1.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201920652U CN202095244U (en) | 2011-06-09 | 2011-06-09 | Absorption-reflection integrated electromagnetic shielding layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201920652U CN202095244U (en) | 2011-06-09 | 2011-06-09 | Absorption-reflection integrated electromagnetic shielding layer |
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| Publication Number | Publication Date |
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| CN202095244U true CN202095244U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201920652U Expired - Fee Related CN202095244U (en) | 2011-06-09 | 2011-06-09 | Absorption-reflection integrated electromagnetic shielding layer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106817888A (en) * | 2017-03-24 | 2017-06-09 | 上海巽晔计算机科技有限公司 | A kind of central control machine case for smart home |
| CN106852104A (en) * | 2017-03-24 | 2017-06-13 | 上海源紊新能源科技有限公司 | A kind of electromagnetic shielding car for homework of supplying power |
| CN104363744B (en) * | 2014-12-09 | 2017-07-25 | 成都国蓉科技有限公司 | casing for wireless device |
| CN107864603A (en) * | 2017-11-06 | 2018-03-30 | 龚土婷 | A kind of communication base station electrical control cabinet |
| CN108353523A (en) * | 2015-11-25 | 2018-07-31 | 株式会社巴川制纸所 | Matching type electromagnetic wave absorb |
| CN112237057A (en) * | 2018-06-04 | 2021-01-15 | 麦克赛尔控股株式会社 | Electromagnetic wave absorber |
-
2011
- 2011-06-09 CN CN2011201920652U patent/CN202095244U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363744B (en) * | 2014-12-09 | 2017-07-25 | 成都国蓉科技有限公司 | casing for wireless device |
| CN108353523A (en) * | 2015-11-25 | 2018-07-31 | 株式会社巴川制纸所 | Matching type electromagnetic wave absorb |
| CN106817888A (en) * | 2017-03-24 | 2017-06-09 | 上海巽晔计算机科技有限公司 | A kind of central control machine case for smart home |
| CN106852104A (en) * | 2017-03-24 | 2017-06-13 | 上海源紊新能源科技有限公司 | A kind of electromagnetic shielding car for homework of supplying power |
| CN107864603A (en) * | 2017-11-06 | 2018-03-30 | 龚土婷 | A kind of communication base station electrical control cabinet |
| CN112237057A (en) * | 2018-06-04 | 2021-01-15 | 麦克赛尔控股株式会社 | Electromagnetic wave absorber |
| CN112237057B (en) * | 2018-06-04 | 2023-09-12 | 麦克赛尔株式会社 | electromagnetic wave absorber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20130609 |