Flexible wave-absorbing sheet with bending compensation guide groove

Abstract

This utility model relates to the field of microwave absorbing materials, specifically a flexible microwave absorbing sheet with bending compensation grooves. It includes a wave-shaped microwave absorbing sheet body with bending compensation grooves on its surface, and a composite dielectric layer on the bottom surface of the wave-shaped microwave absorbing sheet body. This utility model, through the wave-shaped microwave absorbing sheet body with bending compensation grooves on its surface, combined with the flexible microwave absorbing film layer thereon, can effectively absorb electromagnetic waves. Simultaneously, the bending compensation grooves enhance the adaptability of the microwave absorbing sheet when bent. The composite dielectric layer, silicon carbide fiber layer, and flexible conductive film layer on the bottom surface work synergistically to improve microwave absorption performance and ensure overall flexibility. The flexible substrate support layer and its honeycomb porous design on the bottom surface provide good support and buffering for the microwave absorbing sheet, enhancing its flexibility and microwave absorption effect. This flexible microwave absorbing sheet possesses good microwave absorption performance while also exhibiting good flexibility and adaptability, meeting the application requirements of various complex scenarios.

Description

Technical Field

[0001] This utility model relates to the field of microwave absorbing materials technology, specifically a flexible microwave absorbing sheet with a bending compensation guide groove. Background Technology

[0002] In today's era of highly integrated electronic devices and rapidly developing communication technologies, electromagnetic interference is becoming increasingly prominent. Whether it's electromagnetic protection of aircraft electronic systems in the aerospace field, reducing signal interference in mobile communication base stations, or ensuring the normal operation of consumer electronics products, absorbing materials play a crucial role. Flexible absorbing sheets, as an important branch of absorbing materials, possess unique advantages in electromagnetic protection for complex shapes and curved structures due to their bendability and ease of application.

[0003] Publication No. CN210062275U discloses a high-performance flexible absorbing sheet. Although it is called flexible, it is prone to structural damage when subjected to frequent bending or complex curved surface bonding, resulting in a decrease in absorption performance. For example, in wearable electronic devices, the device is constantly bent during use. Traditional flexible absorbing sheets cannot withstand such long-term bending stress and are prone to cracking or even falling off, affecting the electromagnetic compatibility of the device. Utility Model Content

[0004] The purpose of this invention is to provide a flexible absorbing sheet with a bending compensation guide groove to solve the problem of insufficient flexibility of existing flexible absorbing sheets mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flexible absorbing sheet with bending compensation guide grooves includes a wave-shaped absorbing sheet body with bending compensation guide grooves on its surface. A composite dielectric layer is disposed on the bottom surface of the wave-shaped absorbing sheet body. A silicon carbide fiber layer is disposed on the bottom surface of the composite dielectric layer. A flexible conductive thin film layer is disposed on the bottom surface of the silicon carbide fiber layer.

[0007] The surface of the wave-shaped absorbing sheet body is provided with a flexible absorbing film layer.

[0008] The bottom surface of the flexible conductive thin film layer is provided with a flexible substrate support layer, and the bottom surface of the flexible substrate support layer adopts a honeycomb porous design.

[0009] Preferably, the corrugated absorbing sheet body is a thermoplastic elastic plate, and the surface of the corrugated absorbing sheet body is provided with absorbing filler, which is graphene particles or carbon nanotubes. Making the corrugated absorbing sheet body a thermoplastic elastic plate gives it good flexibility and plasticity, easily adapting to the installation requirements of various complex shapes and curved surfaces, and allowing it to quickly return to its original shape after bending. Using graphene particles or carbon nanotubes as absorbing fillers, these two materials have excellent wave absorption performance, which can significantly enhance the absorption capacity of the absorbing sheet body for electromagnetic waves, broaden the absorption frequency band, and improve absorption efficiency.

[0010] Preferably, the flexible absorbing film layer employs a nano-level antistatic film coating with a thickness of 20-50 μm. This nano-level antistatic film coating not only effectively absorbs electromagnetic waves but also possesses excellent antistatic properties, preventing static electricity accumulation from damaging surrounding electronic equipment and ensuring its safe operation. The appropriate thickness ensures both absorption and antistatic performance without compromising the flexibility of the absorbing sheet, making it easy to install and use.

[0011] Preferably, the corrugated absorber body is equipped with several sets of uniformly and equidistantly arranged rubber columns. The rubber columns play a supporting and buffering role, which enhances the structural strength of the absorber body and makes it less prone to damage when subjected to external pressure or bending. At the same time, it also helps to maintain the stability of the corrugated structure and ensures stable output of absorption performance.

[0012] Preferably, the composite dielectric layer is a composite dielectric layer of hollow ceramic microspheres and resin-based material, with a dielectric constant of 3-5 and a thickness of 100-200 μm. The composite structure of hollow ceramic microspheres and resin-based material gives the composite dielectric layer suitable dielectric properties, enabling it to work synergistically with other layers of the absorbing sheet to optimize the propagation and loss process of electromagnetic waves within the absorbing sheet, thereby improving the overall absorption performance. Precisely controlled dielectric constant and thickness contribute to achieving efficient absorption of electromagnetic waves in specific frequency bands.

[0013] Preferably, the silicon carbide fiber has a thickness of 150-300 μm, and the flexible conductive film layer is a copper foil / silver nanowire film layer with a thickness of 5-10 μm and a conductivity ≥10. 6 The S / m high conductivity copper foil / silver nanowire film can effectively guide and dissipate electromagnetic waves, improving the electromagnetic shielding and absorption efficiency of the absorber, while the thinner thickness ensures the overall flexibility.

[0014] Preferably, the edges of the wave-shaped absorbing sheet body, composite dielectric layer, silicon carbide fiber layer, flexible conductive film layer and flexible substrate support layer are sealed by a U-shaped edging ring, which effectively prevents peeling between the layers and erosion by external environmental factors such as moisture and dust, thereby improving the reliability and service life of the absorbing sheet and ensuring that it can work stably in different environments.

[0015] Preferably, the bottom surface of the flexible substrate support layer is provided with an adhesive layer with a thickness of 5-10 μm, which allows the absorbing sheet to be easily and firmly attached to the required location, enhancing the convenience and stability of installation. At the same time, the adhesive layer thickness is moderate and will not affect the flexibility and overall performance of the absorbing sheet.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: In this flexible absorbing sheet with bending compensation guide groove, the wave-shaped absorbing sheet body with bending compensation guide groove on its surface, together with the flexible absorbing film layer thereon, can effectively absorb electromagnetic waves. At the same time, the bending compensation guide groove can enhance the adaptability of the absorbing sheet when bending. The composite dielectric layer, silicon carbide fiber layer and flexible conductive film layer on the bottom surface work together to improve the wave absorption performance and ensure the overall flexibility. The flexible substrate support layer and its bottom surface honeycomb porous design provide good support and buffer for the absorbing sheet, further enhancing its flexibility and wave absorption effect. This makes the flexible absorbing sheet have good wave absorption performance, as well as good flexibility and adaptability, which can meet the needs of various complex scenarios. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are explained in detail together with the embodiments of the present invention, but do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the wave-shaped absorbing sheet body of this utility model;

[0021] 10. Wave-shaped absorbing sheet body; 11. Flexible absorbing film layer; 12. Rubber column;

[0022] 20. Composite dielectric layer;

[0023] 30. Silicon carbide fiber layer;

[0024] 40. Flexible conductive thin film layer;

[0025] 50. Flexible substrate support layer;

[0026] 60. Binding ring;

[0027] 70. Adhesive layer. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Flexible absorbing sheet with bending compensation guide groove, such as Figures 1-3 As shown, the device includes a corrugated absorbing sheet body 10 with bend compensation guide grooves on its surface. A composite dielectric layer 20 is disposed on the bottom surface of the corrugated absorbing sheet body 10. A silicon carbide fiber layer 30 is disposed on the bottom surface of the composite dielectric layer 20. A flexible conductive thin film layer 40 is disposed on the bottom surface of the silicon carbide fiber layer 30. A flexible absorbing thin film layer 11 is disposed on the surface of the corrugated absorbing sheet body 10. A flexible substrate support layer 50 is disposed on the bottom surface of the flexible conductive thin film layer 40. The bottom surface of the flexible substrate support layer 50 adopts a honeycomb porous design. Through the corrugated absorbing sheet body 10 with bend compensation guide grooves on its surface, and in conjunction with the... The flexible absorbing film layer 11 can effectively absorb electromagnetic waves, while the bending compensation guide groove can enhance the adaptability of the absorbing sheet when bending. The composite dielectric layer 20, silicon carbide fiber layer 30, and flexible conductive film layer 40 on the bottom surface work together to improve the absorption performance and ensure the overall flexibility. The flexible substrate support layer 50 and its bottom surface honeycomb porous design provide good support and buffer for the absorbing sheet, further enhancing its flexibility and absorption effect. This makes the flexible absorbing sheet have good absorption performance, as well as good flexibility and adaptability, which can meet the needs of various complex scenarios.

[0031] Furthermore, the corrugated absorbing sheet body 10 is a thermoplastic elastic plate, and the surface of the corrugated absorbing sheet body 10 is provided with absorbing filler, which is graphene particles or carbon nanotubes. By setting the corrugated absorbing sheet body 10 as a thermoplastic elastic plate and providing absorbing filler such as graphene particles or carbon nanotubes on the surface, the absorbing sheet body has good flexibility and wave absorption performance. The thermoplastic elastic plate gives it bendable characteristics, while the absorbing filler enhances its ability to absorb electromagnetic waves.

[0032] It is worth noting that the flexible absorbing film layer 11 adopts a nano-level antistatic film coating with a thickness of 20-50μm. Several sets of uniformly and equidistantly arranged rubber pillars 12 are installed inside the wave-shaped absorbing sheet body 10, which enhances the structural strength and elasticity of the absorbing sheet body, enabling it to better recover its original shape when subjected to external force bending. It also helps to stabilize the absorbing performance. By using a nano-level antistatic film coating as the flexible absorbing film layer 11 and controlling the thickness to 20-50μm, the film layer not only has the function of absorbing waves, but also effectively prevents the accumulation of static electricity and avoids static electricity from interfering with surrounding electronic equipment. At the same time, the appropriate thickness ensures a balance between its flexibility and absorbing effect.

[0033] Among them, the composite dielectric layer 20 adopts a composite dielectric layer of hollow ceramic microspheres and resin, with a dielectric constant of 3-5 and a thickness of 100-200μm, so that the composite dielectric layer has suitable dielectric properties, can work together with other layers of the absorbing sheet to optimize the absorption and loss process of electromagnetic waves and improve the overall absorption performance.

[0034] Specifically, the silicon carbide fiber 30 has a thickness of 150-300 μm. Utilizing the high strength and excellent wave absorption characteristics of silicon carbide fibers, the structural stability and wave absorption capability of the absorbing sheet are enhanced. The flexible conductive thin film layer 40 is a copper foil / silver nanowire film layer with a thickness of 5-10 μm and a conductivity ≥10. 6 The S / m ratio gives the flexible conductive film layer excellent conductivity, which can effectively guide and dissipate electromagnetic waves, while the thin thickness ensures overall flexibility.

[0035] In addition, the edges of the wave-shaped absorbing sheet body 10, the composite dielectric layer 20, the silicon carbide fiber layer 30, the flexible conductive film layer 40, and the flexible substrate support layer 40 are sealed by a U-shaped edging ring 60, which effectively prevents peeling between the layers and erosion by external environmental factors, thereby improving the reliability and service life of the absorbing sheet.

[0036] It is worth noting that the bottom surface of the flexible substrate support layer 50 is provided with an adhesive layer 70, which is 5-10μm thick, so that the absorbing sheet can be easily pasted to the required position, enhancing its ease of installation.

[0037] The working principle of this flexible absorbing sheet with bending compensation guide groove:

[0038] First, determine the installation position of the absorbing sheet according to the needs of the actual application scenario; since the bottom surface of the flexible substrate support layer 50 is provided with an adhesive layer 70, the absorbing sheet can be easily aligned with the target position and pasted and fixed, ensuring that the pasting surface is flat and free of air bubbles.

[0039] During installation, the corrugated absorber body 10 is a thermoplastic elastic plate with a certain degree of flexibility, which can adapt well to the bending and undulation of the installation surface; the bending compensation guide groove on its surface further enhances this adaptability and avoids damage or performance degradation during bending.

[0040] After installation, when electromagnetic waves are incident, the wave-shaped absorbing sheet body 10 with bending compensation guide grooves on the surface and the flexible absorbing film layer 11 on it take the lead in absorbing part of the electromagnetic waves; the composite dielectric layer 20 uses its hollow ceramic microspheres and resin-based composite structure to further attenuate the electromagnetic waves; the silicon carbide fiber layer 30 participates in the electromagnetic wave absorption process with its own characteristics; and the flexible conductive film layer 40 guides and attenuates electromagnetic waves through its high conductivity; the layers work together to achieve a good wave absorption effect.

[0041] In addition, the edge-sealing ring 60 seals and protects the edges of each layer to prevent interference from external factors and ensure the stable performance of the absorbing sheet throughout the entire use process.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible wave-absorbing sheet with a bending compensation guide groove, characterized in that: The device includes a wave-shaped absorbing sheet body (10) with a bending compensation guide groove on the surface. A composite dielectric layer (20) is provided on the bottom surface of the wave-shaped absorbing sheet body (10). A silicon carbide fiber layer (30) is provided on the bottom surface of the composite dielectric layer (20). A flexible conductive film layer (40) is provided on the bottom surface of the silicon carbide fiber layer (30). The surface of the wave-shaped absorbing sheet body (10) is provided with a flexible absorbing film layer (11). The bottom surface of the flexible conductive thin film layer (40) is provided with a flexible substrate support layer (50), and the bottom surface of the flexible substrate support layer (50) adopts a honeycomb porous design.

2. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The wave-shaped absorbing sheet body (10) is a thermoplastic elastic plate, and the surface of the wave-shaped absorbing sheet body (10) is provided with absorbing filler, which is graphene particles or carbon nanotubes.

3. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The flexible absorbing film layer (11) adopts a nano-level antistatic film coating with a thickness of 20-50μm.

4. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The wave-shaped absorbing sheet body (10) is equipped with several sets of rubber columns (12) arranged evenly and at equal intervals.

5. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The composite dielectric layer (20) is a composite dielectric layer of hollow ceramic microspheres and resin, with a dielectric constant of 3-5 and a thickness of 100-200μm.

6. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The thickness of the silicon carbide fiber layer (30) is 150-300 μm, the flexible conductive film layer (40) adopts a copper foil / silver nanowire film layer, the thickness is 5-10 μm, and the electrical conductivity is ≥10 6 S / m.

7. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The edges of the wave-shaped absorbing sheet body (10), composite dielectric layer (20), silicon carbide fiber layer (30), flexible conductive thin film layer (40) and flexible substrate support layer (50) are sealed by a U-shaped edging ring (60).

8. The flexible absorbing sheet with bending compensation guide groove according to claim 1, characterized in that: The bottom surface of the flexible substrate support layer (50) is provided with an adhesive layer (70) with a thickness of 5-10 μm.

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