CN211267566U - Wave-absorbing composite layer - Google Patents
Wave-absorbing composite layer Download PDFInfo
- Publication number
- CN211267566U CN211267566U CN201922331436.XU CN201922331436U CN211267566U CN 211267566 U CN211267566 U CN 211267566U CN 201922331436 U CN201922331436 U CN 201922331436U CN 211267566 U CN211267566 U CN 211267566U
- Authority
- CN
- China
- Prior art keywords
- layer
- wave
- absorbing
- composite
- reinforcing
- 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.)
- Active
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
The utility model provides a wave-absorbing composite layer, which comprises a strengthening layer and a wave-absorbing layer; wherein the reinforcing action layer is a phenolic aldehyde material layer. The utility model provides a inhale ripples composite bed has the ripples frequency band of inhaling of broad, and is better to the absorption effect of electromagnetic wave simultaneously.
Description
Technical Field
The utility model belongs to stealthy material layer relates to a inhale ripples composite bed.
Background
With the development of modern science and technology, the influence of electromagnetic wave radiation on the environment is increasing day by day. The airplane and airplane flight are mistakenly started because the airplane and airplane flight cannot take off due to electromagnetic wave interference; in hospitals and mobile phones, the normal operation of various electronic medical instruments is often interfered. Therefore, the wave-absorbing material, which is a material capable of resisting and weakening electromagnetic wave radiation, is a major subject of material science to be found for treating electromagnetic pollution.
By a wave-absorbing material is meant a material that absorbs or substantially attenuates electromagnetic wave energy impinging on its surface, thereby reducing the interference of electromagnetic waves. In engineering application, the wave-absorbing material is required to have high absorption rate to electromagnetic waves in a wider frequency band, and also required to have the properties of light weight, temperature resistance, moisture resistance, corrosion resistance and the like. Most of the existing commonly used wave-absorbing materials can only act in a certain frequency band, and have the problems of high surface density, non-corrosion resistance and the like, so that the difficulty of later maintenance is increased, the use performance is reduced, the self weight is increased, and especially the requirement of aviation equipment on the self weight is very strict, and the wave-absorbing materials are difficult to be widely applied.
The structural wave-absorbing material is a functional composite material developed on the basis of the traditional wave-absorbing material, and has the advantages of wide wave-absorbing frequency band, good wave-absorbing efficiency, no extra weight increase and the like. The existing structural wave-absorbing material generally considers wave-absorbing performance and mechanical property, and an absorbent such as carbon fiber is mixed with resin and then coated on a reinforcing material, so that although wave-absorbing frequency bandwidth is widened to a certain extent, the effective wave band (less than 10dB) is still narrow, and the stealth effect is poor.
CN108908961A discloses a glass fiber reinforced plastic composite structure wave-absorbing material and a preparation method thereof, comprising a plurality of layers of glass fiber cloth with wave-absorbing ability, wherein the layers of the plurality of layers of glass fiber cloth with wave-absorbing ability are bonded, cured and formed by resin, wherein any layer of glass fiber cloth with wave-absorbing ability is prepared by dipping, spraying or coating wave-absorbing coating on the glass fiber cloth and curing. The patent has a wider wave-absorbing frequency band to a certain extent, and still can not achieve the purpose of effective stealth. CN109526192A discloses a wave-absorbing composite material, and the structure of the wave-absorbing composite material is as follows from the surface layer to the inner layer: the structure of the dielectric layer can be a structure that the concentration of the dielectric absorbent is gradually increased from the incidence direction of the electromagnetic wave, a structure that the incidence direction of the electromagnetic wave with the concentration of the dielectric absorbent is increased firstly and then reduced, a structure that the incidence direction of the electromagnetic wave with the concentration of the dielectric absorbent is increased and reduced alternately, a structure that the incidence direction of the electromagnetic wave with the concentration of the dielectric absorbent is kept unchanged, and the like; the dielectric layer comprises a dielectric absorbent, resin and fiber cloth; the magnetic medium layer comprises a magnetic medium absorbent, resin and fiber cloth. The process of the wave-absorbing composite material comprises the following steps: preparing a wave-absorbing resin sizing material; preparing a wave-absorbing adhesive film; preparing wave-absorbing prepreg; preparing a wave-absorbing composite material; the wave-absorbing composite material successfully reduces the weight, but does not pay more attention to the wide wave-absorbing frequency band.
Therefore, it is desirable to develop a structural wave-absorbing material with a wider wave-absorbing frequency band.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a inhale ripples composite bed. The utility model provides a inhale ripples composite bed has the ripples frequency band of inhaling of broad, and is better to the absorption effect of electromagnetic wave simultaneously.
In order to achieve the purpose of the utility model, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides a wave-absorbing composite layer, which comprises a strengthening action layer and a wave-absorbing layer;
wherein the reinforcing action layer is a phenolic aldehyde material layer.
The utility model discloses a set up the reinforcing action layer, can improve the impedance match of air and absorbing layer, make the electromagnetic wave of more frequencies get into absorbing layer as much as possible, widened and inhaled the wave band, improve the absorption effect.
Use the utility model provides a during the composite bed is inhaled to the ripples, the reinforcing effect layer is towards the incident direction of electromagnetic wave, and the reinforcing effect layer is at first received the electromagnetic wave promptly, can make the electromagnetic wave of more frequencies pass the reinforcing effect layer and get into the absorbing layer and then absorbed by the absorbing layer.
Preferably, the wave absorbing layer further comprises an adhesive layer, and the adhesive layer is located between the reinforcing layer and the wave absorbing layer.
Preferably, the phenolic material layer is a phenolic resin composite reinforced material layer.
Preferably, the phenolic resin composite reinforced material is selected from a glass fiber reinforced phenolic resin composite material, a glass cloth reinforced phenolic resin composite material, a glass felt reinforced phenolic resin composite material or a three-dimensional glass fabric reinforced phenolic resin composite material.
The phenolic resin of the utility model does not comprise modified phenolic aldehyde, for example, boron phenolic aldehyde is not in the phenolic resin range of the utility model.
Phenolic resin composite reinforcement material layer can be arbitrary phenolic resin composite reinforcement material layer among the prior art, exemplary, the utility model lists a glass cloth reinforcing phenolic resin composite material and has done the description: mixing phenolic resin and a curing agent, and then dipping, drying and curing the glass cloth to obtain the phenolic resin composite reinforced material layer. Such as an LC195 type phenolic resin composite reinforcing material layer provided by milbery Lewcottcorp, usa, an SS-R19 type phenolic resin composite reinforcing material layer provided by jen shengquan group ltd, and the like.
Preferably, the thickness of the enhancement layer is 0.2-0.5mm, such as 0.3mm, 0.4mm, etc.
In the utility model, the thickness of the strengthening action layer can not be too thin, otherwise the strengthening action of the strengthening action layer is deteriorated; it should not be too thick, which would otherwise cause a strong reflection of the electromagnetic waves at the air-strengthening layer interface, which would adversely affect the absorption of the electromagnetic waves.
The utility model discloses in, the wave-absorbing layer is phenolic aldehyde combined material wave-absorbing layer.
The utility model discloses a phenolic materials class reinforcing absorbed layer and the cooperation of the phenolic composites absorbed layer that has wave-absorbing effect compare in the absorbed layer of other materials, the utility model discloses equal preferred phenolic materials has better matching reinforcing effect, can make the absorbing composite layer that obtains at last have wideer wave-absorbing frequency band, have more excellent wave-absorbing effect.
Preferably, the thickness of the wave-absorbing layer is 18-22mm, such as 19mm, 20mm, 21mm, etc.
In the utility model, the thickness of the wave-absorbing layer cannot be too thin, otherwise the wave-absorbing effect is deteriorated; and the thickness of the wave-absorbing composite layer cannot be too thick, otherwise, the weight and the thickness of the wave-absorbing composite layer are too large, and the application of the wave-absorbing composite layer is influenced.
Preferably, the wave-absorbing layer comprises a filtering and absorbing layer and a shielding layer.
Preferably, the wave absorbing layer further comprises a strong magnetic loss layer, and the strong magnetic loss layer is located between the filtering and absorbing layer and the shielding layer.
The utility model discloses in, filtering absorbing layer, strong magnetic loss layer and shielding layer commonly used among the prior art all can be applied to the utility model discloses, for example polyurethane base or the filtering absorbing layer, strong magnetic loss layer and the shielding layer of polymethyl imide base.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model can improve the impedance matching between the air and the wave-absorbing layer by arranging the strengthening layer, so that the electromagnetic waves with more frequencies enter the wave-absorbing layer as much as possible, thereby widening the wave-absorbing frequency band and improving the absorbing effect;
(2) the utility model discloses a phenolic materials class reinforcing absorbing layer cooperates with the phenolic composites absorbing layer that has wave-absorbing effect, compares in other absorbing layers of material, the utility model discloses all prefer phenolic materials, have better matching reinforcing effect, can make the absorbing composite layer that obtains finally have wider absorbing frequency band, have more excellent absorbing effect;
(3) the utility model provides a inhale ripples composite bed has the ripples frequency band of inhaling of broad, and is better to the absorption effect of electromagnetic wave simultaneously, and wherein, it is the highest more than can reach 12GHz to inhale the ripples frequency band width, and absorption efficiency is more than 85%.
Drawings
Fig. 1 is a schematic structural view of a wave-absorbing composite layer provided in embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a wave-absorbing composite layer provided in embodiment 2 of the present invention.
Fig. 3 is a schematic structural view of a wave-absorbing composite layer provided in embodiment 3 of the present invention.
Wherein, 1-a strengthening layer; 2-wave absorbing layer; 201-filtration absorption layer; 202-a strongly magnetic depletion layer; 203-shielding layer.
Detailed Description
The technical solution of the present invention will be further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.
Example 1
A wave-absorbing composite layer is shown in figure 1 and consists of a strengthening layer 1 and a wave-absorbing layer 2.
Wherein the reinforcing action layer 1 is an SS-R19 type glass cloth reinforced phenolic resin composite material provided by Jinan Shengquan group GmbH, and the thickness is 0.3 mm.
Wherein, the wave-absorbing layer 2 is a polyurethane composite wave-absorbing layer mentioned in the research on the preparation and wave-absorbing performance of polyurethane-based wave-absorbing patches, and the thickness is 20 mm.
Example 2
A wave-absorbing composite layer is shown in figure 2 and consists of a strengthening layer 1 and a wave-absorbing layer 2.
The enhancement layer 1 was the same as in example 1.
The wave absorbing layer 2 is composed of a filtering and absorbing layer 201 and a shielding layer 203, and the filtering and absorbing layer 201 is located between the enhancing layer 1 and the shielding layer 203.
Wherein the transitional absorption layer 201 is a SS-R53T type phenolic composite transitional absorption layer of Shandong Shengquan New Material Co., Ltd, and has a thickness of 20 mm; the shielding layer 203 is a ZYS-10 type phenolic aldehyde composite material shielding layer of Jiangsu Zeuzen carbon fiber products Limited, and the thickness is 2 mm.
Example 3
A wave-absorbing composite layer is shown in figure 3 and consists of a strengthening layer 1 and a wave-absorbing layer 2.
The enhancement layer 1 was the same as in example 1.
The wave absorbing layer 2 is composed of a filtering and absorbing layer 201, a strong magnetic loss layer 202 and a shielding layer 203 which are sequentially arranged, and the filtering and absorbing layer 201 is located between the enhancing layer 1 and the shielding layer 203.
Wherein the transitional absorption layer 201 is a SS-R53T type phenolic composite transitional absorption layer of Shandong Shengquan New Material Co., Ltd, and has a thickness of 12 mm; the strong magnetic loss layer 202 is a YW1 type carbonyl iron powder strong magnetic loss layer of Jiangsu Tianyi superfine metal powder company Limited, and the thickness is 8 mm; the shielding layer 203 is a ZYS-10 type phenolic aldehyde composite material shielding layer of Jiangsu Zeuzen carbon fiber products Limited, and the thickness is 2 mm.
Example 4
The difference from example 1 is that the reinforcing layer provided in example 1 was replaced with a phenol resin layer (phenol resin PF-8013 type provided by yonan holy spring group co.
Example 5
The difference from the embodiment 1 is that the wave-absorbing layer provided in the embodiment 1 is replaced by a poly-methyl imide composite wave-absorbing layer (Huang Xiao Zhong et al, preparation and performance research of the wave-absorbing PMI foam composite).
Example 6
The difference from the example 1 is that the wave-absorbing layer provided in the example 1 is replaced by an SS-F53 type full-band stealth material plate provided by Shandong Shengquan New Material Co.
Comparative examples 1 to 3
The difference from examples 1 to 3 is that the reinforcing layer is not included.
Comparative examples 4 to 5
The difference from example 3 is that the thickness of the reinforcing layer was 0.1mm (comparative example 4) and 0.7mm (comparative example 5).
Comparative example 6
The difference from embodiment 6 is that the enhancement layer is replaced with an impedance matching layer (an impedance matching layer disclosed in CN 106535595A).
Comparative example 7
The difference from example 6 is that the reinforcing layer was replaced with a glass cloth reinforced borophenolic resin composite material of SS-RB19 type supplied by Shandong Shengquan New materials Co.
Performance testing
The wave-absorbing composite layers provided in examples 1 to 6 and comparative examples 1 to 7 were subjected to a performance test by the following method:
(1) wave-absorbing frequency bandwidth and wave-absorbing effect: testing by using a radar wave absorbing material reflectivity testing method, namely a testing method provided by GJB 2038A-2011;
the test results are shown in table 1:
TABLE 1
According to the embodiment and the performance test, the wave-absorbing composite layer provided by the utility model has a wider wave-absorbing frequency band and a better effect of absorbing electromagnetic waves; the wave-absorbing frequency bandwidth can reach more than 12GHz, and the wave-absorbing effect can reach more than 85% optimally.
As can be seen from the comparison of embodiments 1-3, when the wave-absorbing layer includes filtering absorbing layer, strong magnetic loss layer and shielding layer, can increase the utility model provides a wave-absorbing composite layer's beneficial effect. As can be seen from the comparison between the embodiment 1 and the embodiment 6, when the reinforcing layer and the wave-absorbing layer are phenolic materials, the wave-absorbing composite layer provided by the utility model has the best wave-absorbing effect.
As can be seen from the comparison between examples 1-3 and comparative examples 1-3, the wave-absorbing composite layer provided by the present embodiment has a good wave-absorbing effect only when it includes a reinforcing layer; as can be seen from the comparison between example 3 and comparative examples 4 to 5, the enhanced layer of the present invention has a good wave absorbing effect when the thickness of the enhanced layer is 0.2 to 0.5 mm. As can be seen from the comparison between example 6 and comparative examples 6 to 7, the reinforcing layer of the present invention has a superior wave-absorbing effect when the phenolic resin layer (excluding the modified phenolic resin) is selected and the reinforcing layer does not contain a wave-absorbing agent.
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above process steps, i.e. the present invention must rely on the above process steps to implement. It should be clear to those skilled in the art that any improvement of the present invention is to the equivalent replacement of the selected raw materials, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (9)
1. A wave-absorbing composite layer is characterized by comprising a strengthening action layer and a wave-absorbing layer;
wherein the reinforcing action layer is a phenolic aldehyde material layer.
2. The wave-absorbing composite layer of claim 1, further comprising an adhesive layer between the reinforcing layer and the wave-absorbing layer.
3. The wave-absorbing composite layer of claim 1, wherein the phenolic material layer is a phenolic resin composite reinforcing material layer.
4. The wave-absorbing composite layer of claim 3, wherein the phenolic resin composite reinforcing material is selected from a glass fiber reinforced phenolic resin composite material, a glass cloth reinforced phenolic resin composite material, a glass mat reinforced phenolic resin composite material or a three-dimensional glass fabric reinforced phenolic resin composite material.
5. The composite absorbing layer of claim 1, wherein the reinforcing layer has a thickness of 0.2-0.5 mm.
6. The wave-absorbing composite layer of claim 1, wherein the wave-absorbing layer is a phenolic composite wave-absorbing layer.
7. The wave-absorbing composite layer of claim 1, wherein the wave-absorbing layer has a thickness of 18-22 mm.
8. The wave-absorbing composite layer of claim 1, wherein the wave-absorbing layer comprises a filter-absorbing layer and a shielding layer, the filter-absorbing layer being disposed between the enhancement layer and the shielding layer.
9. The wave-absorbing composite layer of claim 8, further comprising a strong magnetic loss layer between the filter absorber layer and the shield layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922331436.XU CN211267566U (en) | 2019-12-23 | 2019-12-23 | Wave-absorbing composite layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922331436.XU CN211267566U (en) | 2019-12-23 | 2019-12-23 | Wave-absorbing composite layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211267566U true CN211267566U (en) | 2020-08-14 |
Family
ID=71959055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922331436.XU Active CN211267566U (en) | 2019-12-23 | 2019-12-23 | Wave-absorbing composite layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211267566U (en) |
-
2019
- 2019-12-23 CN CN201922331436.XU patent/CN211267566U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110845844B (en) | Preparation method of PANI/MXene/carbon cloth composite wave-absorbing material | |
| CN105196638B (en) | A kind of broadband absorbing load composite and preparation method thereof | |
| CN109862769A (en) | A kind of absorbing material and preparation method thereof of ultra-thin ultra-wide spectrum | |
| CN104371271A (en) | New corrosion resistant composite wave absorbing material | |
| CN101384159B (en) | Electromagnetic compatible wood based composite material with shielding cloth covered on surface and preparation thereof | |
| CN102179965A (en) | Three-layer composite wave-absorbing film and preparation method thereof | |
| CN109664577B (en) | Electromagnetic shielding composite material and preparation method thereof | |
| CN112029376B (en) | High-performance radar composite wave-absorbing coating material and preparation method thereof | |
| CN114670526A (en) | Wave-absorbing honeycomb core material and wave-absorbing honeycomb core sandwich structure | |
| CN105113217A (en) | Composite fiber capable of simultaneously absorbing low-frequency and high-frequency electromagnetic waves and preparation method thereof | |
| CN113105811A (en) | Corrosion-resistant light broadband wave-absorbing coating and preparation method thereof | |
| CN108633241A (en) | A kind of suction wave cellular material and preparation method thereof | |
| CN106211728A (en) | A kind of graphene coated Fe3o4the composite wave-suction material preparation method of nano-particle | |
| CN112046086A (en) | Preparation method of wave-absorbing honeycomb | |
| CN108633242B (en) | Titanium carbon/nickel composite powder electromagnetic wave absorbent and preparation method thereof | |
| CN106626619A (en) | Microwave-absorbing composite material loaded with round patch metamaterial | |
| CN112341972A (en) | Flexible wave-absorbing material and preparation method thereof, wave-absorbing adhesive tape and preparation method thereof | |
| CN211267566U (en) | Wave-absorbing composite layer | |
| CN117002111A (en) | Layered high-temperature-resistant wave-absorbing glass cloth honeycomb core structure and preparation method thereof | |
| CN210441746U (en) | Wallboard of radar invisible shelter | |
| CN209546224U (en) | Wide-band and wave-absorbing piece and its electronic equipment | |
| CN201425843Y (en) | Novel broadband multilayer absorber | |
| CN213485520U (en) | Polypropylene wave-absorbing sheet | |
| CN204939979U (en) | Can simultaneously stability low frequency and frequency electromagnetic waves composite fibre and comprise fabric or the clothes of composite fibre | |
| CN114213880A (en) | Preparation method of SiC-based wave-absorbing coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |