CN213141904U - Electromagnetic wave absorption adhesive tape - Google Patents
Electromagnetic wave absorption adhesive tape Download PDFInfo
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- CN213141904U CN213141904U CN201922401829.3U CN201922401829U CN213141904U CN 213141904 U CN213141904 U CN 213141904U CN 201922401829 U CN201922401829 U CN 201922401829U CN 213141904 U CN213141904 U CN 213141904U
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Abstract
The embodiment of the utility model relates to an electromagnetic wave absorption adhesive tape, which comprises a waterproof layer, a plurality of wave absorption honeycombs, a base, an electromagnetic wave shielding layer, a conductive adhesive layer and a release layer which are sequentially stacked; the electromagnetic wave absorbing adhesive tape further comprises a plurality of wave absorbing foam conical cones, and the wave absorbing foam conical cones are all arranged on the base and are respectively located inside the wave absorbing honeycombs. The electromagnetic wave absorption adhesive tape can be used for large-angle test, has high absorptivity (for example, the wave absorption effect can reach-30 dB at most) to incident electromagnetic waves in a wide frequency range, can be used for a long time, and is non-toxic and harmless to human bodies; the electromagnetic wave absorption adhesive tape is applied to RCS test, and can improve the RCS test precision.
Description
Technical Field
The utility model relates to an electromagnetic wave field especially relates to an electromagnetic wave absorbs sticky tape.
Background
At present, RCS test relates to broadband and multi-angle test; in the test process, a carrier is needed to be used for mounting a test sample piece on a test platform, when the test carrier has high radar scattering, a metal foil adhesive tape is needed to be used for reflecting electromagnetic waves to other positions, or a wave-absorbing adhesive tape is used for absorbing the electromagnetic waves; therefore, the RCS of the test carrier is reduced, and the RCS of the test sample can be tested accurately. At present, metal tapes such as copper foil tapes are mainly used, but the metal tapes only can reflect electromagnetic waves and cannot absorb the electromagnetic waves, and only can be pasted at a position capable of reflecting the electromagnetic waves to other places to play a role, and if the metal tapes are pasted at an improper position, the metal tapes are a scattering source and can play a role in reaction, and the test accuracy of a sample piece is influenced. Therefore, the adhesive tape for loss absorption by using electromagnetic waves is a better choice, and at present, wave-absorbing materials such as wave-absorbing honeycombs, wave-absorbing patches, wave-absorbing pointed cone foams and the like are mainly applied to the absorption of interfering electromagnetic waves in RCS tests.
The wave-absorbing honeycomb has good broadband effect, but serious water absorption; the wave absorbing effect is not good enough when only using, and the problem of anisotropy is obvious; certain angles have good wave absorbing effect, and certain angles have even poor wave absorbing effect; is very disadvantageous for large angle testing.
The wave-absorbing conical taper has good large-angle test, but is easy to fall off powder and has larger volume; the minimum height of the cone exceeds 120mm, the water is easy to absorb, and the problem that the sharp angle of the pointed cone is easy to damage also exists; in addition, a large amount of wave-absorbing particles are stored in the foaming holes of the wave-absorbing foam pointed cone, so that the powder is easy to fall off frequently in the use process, and the dust can cause itching after a human body contacts; in addition, if the medicine is inhaled into the lung, the medicine can only enter the lung and cannot exit the lung, so that pneumoconiosis can be caused, and the health of a human body is influenced. The wave-absorbing patch has the advantages of unobvious water absorption problem, no powder falling, large surface density, poor wave-absorbing broadband effect, narrow wave-absorbing frequency band and effective bandwidth often lower than 2 GHz. Therefore, the research on the RCS test adhesive tape which can be used for large-angle test, wide-frequency absorption and long-term use and is nontoxic and harmless to human bodies is urgent.
SUMMERY OF THE UTILITY MODEL
Based on this, the embodiment of the present invention provides an electromagnetic wave absorption tape.
The utility model relates to an electromagnetic wave absorbs sticky tape, it includes: the wave-absorbing honeycomb structure comprises a waterproof layer, a plurality of wave-absorbing honeycombs, a base, an electromagnetic wave shielding layer, a conductive adhesive layer and a release layer which are sequentially stacked;
the electromagnetic wave absorbing adhesive tape further comprises a plurality of wave absorbing foam conical cones, and the wave absorbing foam conical cones are all arranged on the base and are respectively located inside the wave absorbing honeycombs.
In one embodiment, in the above electromagnetic wave absorbing tape, the plurality of wave absorbing foam pyramids and the base are integrally formed.
In one embodiment, in the electromagnetic wave absorbing adhesive tape, the heights of the wave absorbing foam pointed cones are respectively smaller than the heights of the inner walls of the wave absorbing honeycombs.
In one embodiment, in the above electromagnetic wave absorbing adhesive tape, an inner wall of each wave absorbing honeycomb is provided with a waterproof coating.
In one embodiment, in the above electromagnetic wave absorbing tape, the waterproof layer and the waterproof coating material are both polyurethane.
In one embodiment, in the electromagnetic wave absorbing tape, the thickness of the waterproof coating material is 10 to 25 μm.
In one embodiment, in the above electromagnetic wave absorption tape, the electromagnetic wave shielding layer is copper and/or aluminum.
In one embodiment, in the above electromagnetic wave absorption tape, the conductive adhesive layer is a hot melt adhesive layer, the hot melt adhesive layer includes a polyester material and a filler, and the filler is silver or nickel.
In one embodiment, in the electromagnetic wave absorbing adhesive tape, the thickness of the waterproof layer is 0.1-0.5 mm, and the height of each wave absorbing honeycomb is 10-50 mm; the height of each wave-absorbing foam conical cone is 0.5-5 mm lower than that of the corresponding wave-absorbing honeycomb, and the thickness of the base is 0.2-10 mm; the thickness of the electromagnetic wave shielding layer is 5-50 microns, the thickness of the conductive adhesive layer is 10-50 microns, and the thickness of the release layer is 25-80 microns.
In one embodiment, in the electromagnetic wave absorbing tape, the electromagnetic wave shielding layer is a metal layer, and the waterproof layer is arranged above the plurality of wave absorbing honeycombs in an adhesive manner;
the wave absorbing honeycombs are arranged on the base in an adhesive mode, the metal layer is plated on the base in an evaporation plating mode, and the conductive adhesive layer is arranged below the metal layer in a roll coating mode.
The embodiment of the utility model provides an above-mentioned electromagnetic wave absorption sticky tape, can carry out wide-angle test, and the absorption rate to the electromagnetic wave is higher in the wide band range, can use for a long time, and is nontoxic harmless to the human body; the electromagnetic wave absorption adhesive tape is applied to RCS test, and can improve the RCS test precision.
Drawings
Fig. 1 is a schematic structural view of an electromagnetic wave absorbing tape according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural view of an electromagnetic wave absorbing tape 100 (i.e., a wave absorbing tape for RCS test) provided in an embodiment of the present invention. As shown in fig. 1, the electromagnetic wave absorbing tape 100 includes a waterproof layer 10, a plurality of wave absorbing honeycombs 20, a base 40, an electromagnetic wave shielding layer 50, a conductive adhesive layer 60, and a release layer 80, which are sequentially stacked.
The electromagnetic wave absorbing adhesive tape further comprises a plurality of wave absorbing foam conical cones 30, wherein the wave absorbing foam conical cones 30 are all arranged on the base 40 and are respectively positioned inside the wave absorbing honeycombs 20.
The electromagnetic wave shielding layer 50 is a metal layer, and the waterproof layer 10 is arranged above the wave-absorbing honeycombs 20 in a bonding manner; the wave absorbing honeycombs 20 are arranged on the base 40 in an adhesive mode, the base 40 is plated with the metal layer 50 in an evaporation mode, the conductive adhesive layer 60 is arranged below the metal layer 50 in a roll coating mode, and the release layer 80 is arranged below the conductive adhesive layer 60.
In this embodiment, the plurality of wave absorbing foam pyramids 30 and the base 40 are integrally formed. The heights of the wave-absorbing foam pointed cones 30 are respectively less than the heights of the inner walls of the wave-absorbing honeycombs 20. In this embodiment, the inner wall of each wave-absorbing honeycomb 20 in the plurality of wave-absorbing honeycombs 20 is provided with a waterproof coating. The waterproof layer 10 and the waterproof coating are both polyurethane. In the present embodiment, the thickness of the waterproof coating material is 10 to 25 μm.
The electromagnetic wave-shielding layer 50 is a metal layer, and the metal layer is copper and/or aluminum.
The conductive adhesive layer 60 is a hot melt adhesive layer, the hot melt adhesive layer includes a polyester material and a filler, and the filler is silver or nickel.
The release layer 80 is any one of a PET fluoroplastic release layer, a PET silicone oil-containing release layer, a PET matte release layer and a PE release layer.
The thickness of the waterproof layer 10 is 0.1-0.5 mm, and the height of the wave-absorbing honeycomb 20 is 10-50 mm; the height of the wave-absorbing foam conical spine 30 is 0.5-5 mm lower than that of the wave-absorbing honeycomb 20, and the thickness of the base 40 is 0.2-10 mm. The thickness of the metal layer 50 is 5-50 microns, the thickness of the conductive adhesive layer 60 is 10-50 microns, and the thickness of the release layer 80 is 25-80 microns.
Example 1
The waterproof layer 10 is made of polyurethane, and the thickness of the waterproof layer 10 is 0.5 mm. The inner wall of each wave-absorbing honeycomb 20 is provided with a waterproof coating, the thickness of the waterproof coating is 25 micrometers, and the waterproof coating is polyurethane. The height of each wave-absorbing honeycomb 20 is 10mm (namely the height of the inner wall of each wave-absorbing honeycomb 20 is 10mm), and the height of each wave-absorbing foam pointed cone 30 is 0.5mm lower than that of the corresponding wave-absorbing honeycomb 20. The wave-absorbing foam pointed cones 30 and the base 40 are integrally formed, and the thickness of the base 40 is 2 mm. The metal layer 50 is copper and aluminum and the thickness of the metal layer 50 is 25 microns. The conductive adhesive layer 60 is a hot melt adhesive made of polyester material, and the filler is silver; the thickness of the layer of conductive glue 60 is 25 microns. The thickness of the release layer 80 is 25 micrometers. For the test of 0 degree and 90 degree incident electromagnetic wave, the absorption rate of the electromagnetic wave absorption tape 100 to the incident electromagnetic wave of 13GHz to 18GHz can reach-8 dB.
Example 2
The waterproof layer 10 is made of polyurethane, and the thickness of the waterproof layer 10 is 0.5 mm. The inner wall of each wave-absorbing honeycomb 20 is provided with a waterproof coating, the thickness of the waterproof coating is 25 micrometers, and the waterproof coating is polyurethane. The height of each wave-absorbing honeycomb 20 is 50mm, and the height of each wave-absorbing foam pointed cone 30 is 5mm lower than that of the corresponding wave-absorbing honeycomb 20. The wave-absorbing foam pointed cones 30 and the base 40 are integrally formed, and the thickness of the base 40 is 0.5 mm. The metal layer 50 is copper and aluminum and the thickness of the metal layer 50 is 25 microns. The conductive adhesive layer 60 is a hot melt adhesive made of polyester material, and the filler is silver; the thickness of the layer of conductive glue 60 is 25 microns. The thickness of the release layer 80 is 25 micrometers. Aiming at the tests of 0-degree and 90-degree incident electromagnetic waves, the absorption rate of the electromagnetic wave absorption tape 100 to the incident electromagnetic waves from 3GHz to 18GHz can reach-20 dB, and the strongest can reach-30 dB.
Example 3
In example 3, the waterproof layer 10 was polyurethane, and the thickness of the waterproof layer 10 was 0.2 mm. The inner wall of each wave-absorbing honeycomb 20 is provided with waterproof paint, the thickness of the waterproof paint is 25 micrometers, and the waterproof paint is polyurethane. The height of each wave-absorbing honeycomb 20 is 40mm, and the height of each wave-absorbing foam pointed cone 30 is 2mm lower than that of the corresponding wave-absorbing honeycomb 20. The wave-absorbing foam pointed cones 30 and the base 40 are integrally formed, and the thickness of the base 40 is 0.5 mm.
The metal layer 50 is copper and aluminum and the thickness of the metal layer 50 is 25 microns. The conductive adhesive layer 60 is a hot melt adhesive made of polyester material, and the filler is silver; the thickness of the conductive adhesive layer 60 is 25 micrometers, and the thickness of the release layer 80 is 25 micrometers. For the test of 0 degree and 90 degree incident electromagnetic wave, the absorption rate of the electromagnetic wave absorption tape 100 to the incident electromagnetic wave of 3GHz to 18GHz can reach-15 dB.
The embodiment of the utility model provides a nontoxic harmless can wide frequency wide angle RCS test with inhale ripples sticky tape 100. The wave-absorbing adhesive tape 100 for RCS test has the following advantages:
(1) after incident electromagnetic waves enter the honeycomb holes, the incident electromagnetic waves can be subjected to multiple reflection losses in a similar pipeline through the wave-absorbing foam conical surface, and the wave-absorbing effect is obvious and can reach-30 dB to the maximum.
(2) The large-angle test difference is reduced, the effective bandwidth of 0-degree test and 90-degree test exceeds 5Ghz, and the electromagnetic wave absorption rate can reach-8 dB.
(3) The wave-absorbing honeycomb wall is sprayed with the waterproof coating, so that the water absorption problem can be avoided, the waterproof layer arranged at the top of the honeycomb can effectively protect the lower wave-absorbing foam from absorbing water and deteriorating, in addition, dust impurities can be prevented from falling into the honeycomb to influence the wave-absorbing effect of the honeycomb, the phenomenon that the human body is itchy due to the fact that the wave-absorbing powder in the honeycomb falls out can be prevented, air is mixed into the honeycomb to absorb the lung to cause irreparable damage, and meanwhile, the wave-absorbing effect of the wave-absorbing powder can be greatly weakened after the effective.
(4) The wave-absorbing pointed cone angle can be effectively protected from being abraded by the fact that the honeycomb wall of the wave-absorbing honeycomb is higher than the wave-absorbing foam pointed cone.
(5) The wave-absorbing foam base is not in a structure directly combined with conductive adhesive, but is directly plated with a metal layer in the middle and then is added with the conductive adhesive with the bonding effect, the plating process is simple, the thinnest can reach several micrometers, and the thickness of the wave-absorbing foam base is more than 10 times that of a conventional conductive adhesive film, but the conductivity and the capacity of reflecting electromagnetic waves are more than one hundred times that of the conductive adhesive, and the metal layer is added in the middle, so that the capacity of improving the RCS testing precision of the wave-absorbing patch is not weakened because the conductive adhesive layer at the bottom layer is less and discontinuous because of less metal particles and the limited capacity of losing the wave-absorbing patch by the electromagnetic.
(6) The wave-absorbing honeycomb and the wave-absorbing foam are made of materials with low surface density, and are easy to disassemble and assemble.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An electromagnetic wave absorbing tape, characterized in that: the electromagnetic wave absorption adhesive tape comprises a waterproof layer, a plurality of wave absorption honeycombs, a base, an electromagnetic wave shielding layer, a conductive adhesive layer and a release layer which are sequentially stacked;
the electromagnetic wave absorbing adhesive tape further comprises a plurality of wave absorbing foam conical cones, and the wave absorbing foam conical cones are all arranged on the base and are respectively located inside the wave absorbing honeycombs.
2. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the wave-absorbing foam pointed cones and the base are integrally formed.
3. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the heights of the wave-absorbing foam conical cones are respectively smaller than the heights of the inner walls of the wave-absorbing honeycombs.
4. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the inner wall of each wave-absorbing honeycomb is provided with waterproof paint.
5. The electromagnetic wave absorbing tape according to claim 4, characterized in that: the waterproof layer and the waterproof coating are both polyurethane.
6. The electromagnetic wave absorbing tape according to claim 4, characterized in that: the thickness of the waterproof coating is 10-25 microns.
7. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the electromagnetic wave shielding layer is copper and/or aluminum.
8. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the conductive adhesive layer is a hot melt adhesive layer.
9. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the thickness of the waterproof layer is 0.1-0.5 mm, and the height of each wave-absorbing honeycomb is 10-50 mm; the height of each wave-absorbing foam conical cone is 0.5-5 mm lower than that of the corresponding wave-absorbing honeycomb, and the thickness of the base is 0.2-10 mm; the thickness of the electromagnetic wave shielding layer is 5-50 microns, the thickness of the conductive adhesive layer is 10-50 microns, and the thickness of the release layer is 25-80 microns.
10. The electromagnetic wave absorbing tape according to claim 1, characterized in that: the electromagnetic wave shielding layer is a metal layer, and the waterproof layer is arranged above the wave-absorbing honeycombs in a bonding mode;
the wave absorbing honeycombs are arranged on the base in an adhesive mode, the metal layer is plated on the base in an evaporation plating mode, and the conductive adhesive layer is arranged below the metal layer in a roll coating mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922401829.3U CN213141904U (en) | 2019-12-27 | 2019-12-27 | Electromagnetic wave absorption adhesive tape |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922401829.3U CN213141904U (en) | 2019-12-27 | 2019-12-27 | Electromagnetic wave absorption adhesive tape |
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| CN213141904U true CN213141904U (en) | 2021-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454643A (en) * | 2023-06-14 | 2023-07-18 | 北京玻钢院复合材料有限公司 | Low-frequency broadband wave-absorbing material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116454643A (en) * | 2023-06-14 | 2023-07-18 | 北京玻钢院复合材料有限公司 | Low-frequency broadband wave-absorbing material |
| CN116454643B (en) * | 2023-06-14 | 2023-08-15 | 北京玻钢院复合材料有限公司 | Low-frequency broadband wave-absorbing material |
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