CN220402255U - Flexible electromagnetic shielding film - Google Patents
Flexible electromagnetic shielding film Download PDFInfo
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- CN220402255U CN220402255U CN202323605082.6U CN202323605082U CN220402255U CN 220402255 U CN220402255 U CN 220402255U CN 202323605082 U CN202323605082 U CN 202323605082U CN 220402255 U CN220402255 U CN 220402255U
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- 239000010410 layer Substances 0.000 claims abstract description 77
- 239000002238 carbon nanotube film Substances 0.000 claims abstract description 64
- 239000011241 protective layer Substances 0.000 claims abstract description 34
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000004744 fabric Substances 0.000 claims abstract description 28
- 239000002313 adhesive film Substances 0.000 claims abstract description 21
- 229910052709 silver Inorganic materials 0.000 claims abstract description 20
- 239000004332 silver Substances 0.000 claims abstract description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 6
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- 230000005855 radiation Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000002285 radioactive effect Effects 0.000 abstract description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 10
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000002041 carbon nanotube Substances 0.000 description 5
- 229910021393 carbon nanotube Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
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- 229920001971 elastomer Polymers 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- 125000004432 carbon atom Chemical group C* 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model belongs to the technical field of electromagnetic shielding materials, and discloses a flexible electromagnetic shielding film, which specifically comprises a carbon nano tube film layer, two flexible protective layers and two adhesive film layers, wherein the carbon content of the carbon nano tube film layer is more than or equal to 99%; the two flexible protective layers are respectively arranged at two sides of the carbon nano tube film layer; each adhesive film layer is respectively and correspondingly arranged between the carbon nano tube film layer and the flexible protective layer. The flexible electromagnetic shielding film provided by the utility model adopts the upper layer of silver fiber cloth and the lower layer of silver fiber cloth to cover the carbon nanotube film, and the carbon nanotube film is bonded by the TPU adhesive film, so that the characteristics of electromagnetic shielding, light weight, thinness and softness of the carbon nanotube film are fully utilized. The flexible electromagnetic shielding film has the advantages of simple manufacturing process, diversified size design, bending resistance and water washing resistance, and can be directly attached to a radiation object to absorb and reflect electromagnetic waves, microwave rays and radioactive rays. The weight of the traditional radiation-proof element is reduced, and the safety, comfort and satisfaction degree of the user in use are greatly improved.
Description
Technical Field
The utility model discloses a flexible electromagnetic shielding film, and belongs to the technical field of electromagnetic shielding materials.
Background
With the rapid development of electronic information technology and communication technology, electromagnetic radiation is increasingly prominent, and electromagnetic radiation becomes a fourth pollution source for water pollution, air pollution and noise pollution, so that electromagnetic radiation not only endangers human health, but also causes safety problems such as electromagnetic interference, electromagnetic leakage and the like.
The traditional electromagnetic shielding material is metal-based, reflects and absorbs electromagnetic waves by utilizing the high conductivity property of the metal, and has the problems of heavy weight, high rigidity and easy corrosion although the metal-based electromagnetic shielding material has excellent electromagnetic shielding capability, so that the field adaptability is weak.
While the electromagnetic shielding materials of absorbing sponge, filtering paste and other materials overcome the defects of metal materials, the electromagnetic shielding efficiency is not ideal, and the electromagnetic shielding materials mainly aim at electromagnetic waves in a medium-high frequency band, and have poor electromagnetic shielding efficiency for electromagnetic waves in a low frequency band of 200K-100 MHz.
Disclosure of Invention
The utility model overcomes the defects of the prior art, and provides a flexible electromagnetic shielding film which solves the problems of high weight of shielding materials, low shielding efficiency, weak field adaptability and difficult low-frequency wave filtration;
the two flexible protective layers are respectively arranged at two sides of the carbon nano tube film layer;
each adhesive film layer is correspondingly arranged between the carbon nano tube film layer and the flexible protective layer.
Preferably, the carbon nanotube film layer is composed of a plurality of carbon nanotube films.
Preferably, the thickness of the carbon nanotube film layer is 15-18 micrometers.
Preferably, the adhesive film layer is made of TPU.
Preferably, the flexible protective layer is made of metal fiber cloth or flexible fabric.
Preferably, the metal fiber cloth is silver fiber cloth.
Preferably, the adhesive layer is further included;
the pasting layer is arranged on one side of the flexible protective layer, which is far away from the carbon nano tube film layer, and is used for pasting with the surface of the product to be shielded.
Preferably, the flexible electromagnetic shielding film is an integrated pressing structure.
The beneficial effects are that: the flexible electromagnetic shielding film provided by the utility model adopts the upper layer of silver fiber cloth and the lower layer of silver fiber cloth to cover the carbon nanotube film, and the carbon nanotube film is bonded by the TPU adhesive film, so that the characteristics of electromagnetic shielding, light weight, thinness and softness of the carbon nanotube film are fully utilized. The flexible electromagnetic shielding film has the advantages of simple manufacturing process, diversified size design, bending resistance and water washing resistance, and can be directly attached to a radiation object to absorb and reflect electromagnetic waves, microwave rays and radioactive rays. The weight of the traditional radiation-proof element is reduced, and the safety, comfort and satisfaction degree of the user in use are greatly improved.
Drawings
FIG. 1 is a schematic view of a flexible electromagnetic shielding film according to an embodiment of the present utility model;
fig. 2 is a schematic top view of a flexible electromagnetic shielding film according to an embodiment of the utility model.
In the figure: 1. a second flexible protective layer; 1-1, a first flexible protective layer; 2. a carbon nanotube film layer; 3. a pasting area; 4. a first adhesive film layer; 4-1, a second adhesive film layer.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems and devices are omitted so as not to obscure the description of the present utility model with unnecessary detail.
The preferred technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.
A flexible electromagnetic shielding film comprises a carbon nano tube film layer 2 with carbon content more than or equal to 99%, two flexible protective layers and two adhesive film layers; the two flexible protective layers are respectively arranged at two sides of the carbon nano tube film layer 2; each adhesive film layer is correspondingly arranged between the carbon nano tube film layer 2 and the flexible protective layer.
Specifically, as shown in fig. 1, the flexible electromagnetic shielding film in this embodiment includes a first flexible protective layer 1-1, a first adhesive film layer 4, a carbon nanotube film layer 2, a second adhesive film layer 4-1 and a second flexible protective layer 1 from bottom to top, wherein the shape and size of the carbon nanotube film layer 2 are diversified and customized according to the requirements, and the adhesive film layer and the flexible protective layer are adaptively changed according to the shape and size of the carbon nanotube film. Specifically, the carbon nanotube film with the carbon content of more than or equal to 99% in the carbon nanotube film layer 2 can be obtained by performing secondary purification on the carbon nanotube film, and specific purification research is disclosed in the university of Ningbo (institute of chemical industry) journal 2021, 7 th month, 34 th period, and the high-temperature purification research of carbon nanotube film, in the text, and can be directly purchased through a shopping platform.
Further, the carbon nanotube film layer 2 is composed of a plurality of carbon nanotube films.
Specifically, the number of layers of the carbon nanotube film is custom designed according to the requirements, and when the carbon nanotube film is applied to scenes with higher requirements on shielding effectiveness, such as precision instruments, military products and the like, the carbon nanotube film layer 2 is formed by a plurality of layers of carbon nanotube films so as to enhance the electromagnetic shielding effect of the electromagnetic shielding film. Specifically, in this embodiment, a flexible electromagnetic shielding film is manufactured, and the shielding efficiency of the flexible electromagnetic shielding film is only 100 dB to 120dB, so that in this embodiment, the carbon nanotube film layer 2 formed by a layer of carbon nanotube film is selected, thereby reducing the cost.
Further, the thickness of the carbon nanotube film layer 2 is 15-18 micrometers.
Specifically, in this embodiment, the thickness of the carbon nanotube film layer 2 is 15-18 micrometers, the surface density of the carbon nanotube film layer 2 is 8 g/square meter to 10 g/square meter, and the carbon nanotube film layer 2 under the specification can ensure that the electromagnetic shielding effect of the flexible electromagnetic shielding film is best, so that the utilization rate of the carbon nanotube film layer 2 is the greatest.
Further, the adhesive film layer is made of TPU (thermoplastic polyurethane elastomer rubber, thermoplastic polyurethanes, TPU).
Specifically, in order to ensure that the carbon nanotube film layer 2 and the flexible protective layer are tightly combined, a film layer is arranged between the carbon nanotube film layer 2 and the flexible protective layer, and the film layer is made of EVA film, PA hot-melt film, PES hot-melt film, TPU film and the like. After hot pressing, the carbon nano tube film layer 2 and the flexible protective layer are pressed into a whole, the tight adhesion of the carbon nano tube film layer 2 can be ensured, the water washing resistance is excellent, and the repeated water washing can be ensured after the pressing without glue opening.
Further, the flexible protective layer is made of metal fiber cloth or flexible fabric.
Specifically, the flexible protective layer in the utility model is made of a flexible substrate, including a metal fiber cloth or a flexible fabric, and is used for protecting the carbon nanotube film layer 2. The flexible substrate can ensure that the flexible electromagnetic shielding film keeps the characteristics of light weight, thinness and softness.
Further, the metal fiber cloth is silver fiber cloth.
Specifically, in this embodiment, the material of the flexible protective layer is silver fiber cloth, and the silver fiber cloth permanently combines a layer of pure silver on the fiber surface, so that a radiation-proof layer is further formed on the fiber surface, meanwhile, the silver fiber cloth maintains the textile properties of light weight, softness, washing resistance and good air permeability, and has good deodorizing and antibacterial properties due to the higher bioactivity of silver ions. Therefore, the flexible electromagnetic shielding film in the embodiment can be used for manufacturing products such as clothes. Specifically, the silver fiber cloth is obtained by permanently combining a layer of pure silver on the surface of the fiber through a special technology, and is commonly used for manufacturing radiation protection clothing, and the production technology is mature and applied to various large manufacturers, and can be conveniently obtained through a shopping platform.
Further, the adhesive layer is also included; the pasting layer is arranged on one side of the flexible protective layer, which is far away from the carbon nano tube film layer 2, and is used for pasting with the surface of the product to be shielded.
Specifically, in this embodiment, the adhesive layer is further included, as shown in fig. 1 and fig. 2, an adhesive area 3 is disposed on a surface of a side, away from the carbon nanotube film layer 2, of the flexible protective layer, the adhesive area 3 is disposed, specifically, a magic tape corresponding to the surface of a product to be shielded is optionally used as the adhesive layer, and adhesive materials of other materials are also optionally used, specifically, in this embodiment, the adhesive layer is disposed on the surface of the second flexible protective layer 1, and is an aqueous self-adhesive, and the aqueous self-adhesive has strong adhesive force, large peeling force, excellent freezing resistance and aging resistance, and is nontoxic and tasteless, and has excellent portability. In this embodiment, set up the adhesion layer on flexible protective layer surface, be convenient for paste flexible electromagnetic shielding film on arbitrary waiting shielding product, greatly improved flexible electromagnetic shielding film's use convenience.
Further, the flexible electromagnetic shielding film is of an integrated pressing structure.
Specifically, the flexible electromagnetic shielding film in this embodiment is an integral lamination structure, specifically, silver fiber cloth is laminated with the TPU adhesive film and the carbon nanotube film layer 2 by a hot press at 130 ℃ for 20 seconds, and the flexible electromagnetic shielding film formed by hot pressing is required to have a flat surface, no damage and no bubbles. After the hot pressing is finished, an adhesive layer is arranged in a preset adhesive area 3.
The working principle of the flexible electromagnetic shielding film in this embodiment is as follows: as shown in fig. 1, when one side surface of the flexible electromagnetic shielding film, on which the adhesive layer is provided, is adhered to the surface of a product to be shielded, metal fibers in the second flexible protective layer 1, i.e., silver fiber cloth, form a conductive net on the cloth, and when electromagnetic waves radiate to the outer surface of the second flexible protective layer 1 of the flexible electromagnetic shielding film, a part of the electromagnetic waves are reflected back by the uniformly distributed metal fibers, and another part of the electromagnetic waves are absorbed by or penetrate through the metal fibers. Part of electromagnetic waves penetrating through the metal fibers penetrate through the second adhesive film layer 4-1, namely the TPU adhesive film and are projected onto the surface of the carbon nanotube film layer 2, and the other part of electromagnetic waves are reflected and absorbed uninterruptedly among the inner pores of the carbon nanotube film; a part of electromagnetic waves are radiated to the pipe diameter of the carbon nano-tube and reflected to the second flexible protective layer 1. If the trace electromagnetic wave still passes through the carbon nano tube film layer 2, the silver fiber cloth serving as the first flexible protective layer 1-1 absorbs the residual electromagnetic wave so as to form a complete electromagnetic shielding process.
In the utility model, the carbon content of the carbon nano tube film layer 2 is not less than 99 percent, and the carbon nano tube is a one-dimensional quantum material with a special structure. The coaxial hollow seamless tubular structure is mainly formed by winding single-layer or multi-layer graphite sheets around the center at a certain angle, carbon atoms in the carbon nano tube are hybridized into bonds in an sp2 mode, and a six-membered ring is used as a basic structural unit, so that the carbon nano tube has very high Young modulus, is a material with high breaking strength, is not easy to damage under the bending condition, is the material with the thinnest thickness, strongest mechanical property, highest electrical conductivity, thermal conductivity and best structural stability, and has the high length-diameter ratio capable of effectively reflecting low-frequency, medium-frequency and high-frequency electromagnetic wave bands, and is an efficient low-frequency shielding material with few at present. The radiation-proof patch disclosed by the utility model takes a carbon nano tube macroscopic body film as a raw material, the carbon nano tube film is hot-pressed inside a radiation-proof flexible silver fiber, and finally a product is attached to a target area, so that the radiation-proof patch plays a role in isolating electromagnetic wave radiation.
The flexible electromagnetic shielding film provided by the utility model adopts the upper layer of silver fiber cloth and the lower layer of silver fiber cloth to cover the carbon nanotube film, and the carbon nanotube film is bonded by the TPU adhesive film, so that the characteristics of electromagnetic shielding, light weight, thinness and softness of the carbon nanotube film are fully utilized. The flexible electromagnetic shielding film has the advantages of simple manufacturing process, diversified size design, bending resistance and water washing resistance, and can be directly attached to a radiation object to absorb and reflect electromagnetic waves, microwave rays and radioactive rays. The weight of the traditional radiation-proof element is reduced, and the safety, comfort and satisfaction degree of the user in use are greatly improved.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (8)
1. The flexible electromagnetic shielding film is characterized by comprising a carbon nano tube film layer, two flexible protective layers and two adhesive film layers, wherein the carbon content of the carbon nano tube film layer is more than or equal to 99%;
the two flexible protective layers are respectively arranged at two sides of the carbon nano tube film layer;
each adhesive film layer is correspondingly arranged between the carbon nano tube film layer and the flexible protective layer.
2. The flexible electromagnetic shielding film according to claim 1, wherein the carbon nanotube film layer is composed of a plurality of carbon nanotube films.
3. The flexible electromagnetic shielding film according to claim 1, wherein the thickness of the carbon nanotube film layer is 15-18 microns.
4. The flexible electromagnetic shielding film according to claim 1, wherein the adhesive film layer is made of TPU.
5. The flexible electromagnetic shielding film according to claim 1, wherein the flexible protective layer is made of metal fiber cloth or flexible fabric.
6. The flexible electromagnetic shielding film of claim 5, wherein the metal fiber cloth is a silver fiber cloth.
7. The flexible electromagnetic shielding film of claim 1, further comprising an adhesive layer;
the pasting layer is arranged on one side of the flexible protective layer, which is far away from the carbon nano tube film layer, and is used for pasting with the surface of the product to be shielded.
8. The flexible electromagnetic shielding film of any one of claims 1-6, wherein the flexible electromagnetic shielding film is an integral laminate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323605082.6U CN220402255U (en) | 2023-12-28 | 2023-12-28 | Flexible electromagnetic shielding film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323605082.6U CN220402255U (en) | 2023-12-28 | 2023-12-28 | Flexible electromagnetic shielding film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220402255U true CN220402255U (en) | 2024-01-26 |
Family
ID=89599495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323605082.6U Active CN220402255U (en) | 2023-12-28 | 2023-12-28 | Flexible electromagnetic shielding film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220402255U (en) |
-
2023
- 2023-12-28 CN CN202323605082.6U patent/CN220402255U/en active Active
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