Elastic area ultra-wideband shielding drape structure

Abstract

The utility model discloses an elastic-area ultra-wideband shielding hanging structure, and provides a nickel-coated graphite silica gel composite structure, and metal nickel and graphite are introduced into a silica gel block, so that the electromagnetic shielding capability of a material can be remarkably improved; besides, a conductive cloth layer structure is combined on the nickel-coated graphite silica gel layer, and the conductive cloth layer has good mechanical strength and conductivity, so that the overall conductivity of the material can be effectively improved, and the problem of falling or instability caused by high fluidity of the silica gel material is avoided. The addition of the conductive cloth layer not only improves the durability and stability of the drape, but also ensures the uniformity and efficient electromagnetic shielding effect of the material in large-area application. According to the technical scheme, the electromagnetic shielding effect is remarkably improved, the stability and adaptability of the material are improved, and the material has wide application prospects. The electromagnetic shielding material is especially suitable for aerospace, communication systems, military protection and other fields with high electromagnetic shielding requirements.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic wave shielding, specifically to an elastic area ultra-wideband shielding drape structure. Background Technology

[0002] With the rapid development of electronic technology and communication equipment, electromagnetic interference (EMI) has become a significant factor affecting equipment performance and reliability, especially in high-frequency equipment, military protection, and aerospace fields, where the demand for efficient and low-cost electromagnetic shielding technology is increasingly urgent. Electromagnetic shielding materials play a crucial role in isolating and reducing electromagnetic interference to equipment. However, while traditional electromagnetic shielding materials possess a certain shielding effectiveness, they still have significant shortcomings in terms of large-area coverage, morphological adaptability, and durability.

[0003] Traditional electromagnetic shielding materials typically employ metals such as copper, nickel, and aluminum, which are widely used due to their excellent conductivity. However, metals exhibit poor flowability, especially in applications involving complex shapes or large areas, often failing to fully adapt to surface morphology. Furthermore, their limited flexibility makes it difficult to achieve uniform coverage on non-planar, curved, or complex geometric surfaces, resulting in suboptimal shielding performance. Therefore, traditional metals are ill-suited for applications requiring flexible deformation and adaptation to varying working environments. Silicone, as a soft and highly fluid material, can adapt to different shapes and complex structures. It offers significant advantages in surface coverage and morphological adaptability, and is easily combined with other materials, making it widely used in sealing, cushioning, and flexible electromagnetic shielding. However, silicone itself has poor conductivity, hindering its ability to provide effective electromagnetic shielding. Moreover, silicone's high flowability presents significant limitations in large-area applications, particularly when applied over large areas, where silicone blocks struggle to maintain a stable shape and are prone to loss or deformation due to gravity or external forces. To address these issues, existing technologies use injection molding or compression molding processes to prepare silicone blocks. However, this method is limited by mold design, material flowability, and molding technology, making it difficult to achieve ideal coverage in large-area or complex-shaped applications. Although the flowability of silicone allows it to adapt to complex surfaces, it cannot effectively bond with large-area shielding surfaces, resulting in poor adhesion in practical applications. Especially in large-scale shielding applications, silicone blocks are prone to problems such as weak adhesion, detachment, or deformation. Therefore, improving the bonding strength between silicone blocks and metal materials and overcoming the morphological stability issues in large-area applications have become key technical challenges in the research and development of electromagnetic shielding materials.

[0004] Application number CN202310944344.7 discloses a heterogeneous structure thermally conductive and electromagnetically shielding silicone rubber and its preparation method. This heterogeneous structure thermally conductive and electromagnetically shielding silicone rubber includes an outer thermally conductive and insulating electromagnetically shielding silicone layer and an inner thermally conductive and conductive electromagnetically shielding silicone layer, with the outer layer encapsulating the inner layer. Its drawback is that the structural strength and bonding force of this technical solution are defective, and problems such as weak adhesion, detachment, or deformation of the silicone blocks still cannot be avoided. Utility Model Content

[0005] This invention aims to address the shortcomings of existing electromagnetic shielding materials in large-area application and morphological adaptability. The technical solution is as follows:

[0006] This invention provides an elastic area ultra-wideband shielding drape structure, characterized in that the elastic area ultra-wideband shielding drape structure consists of a metal-graphite-silicone block layer and a conductive cloth layer from top to bottom;

[0007] The metal-graphite-silicone block layer consists of a silicone block, a graphite material layer, and a metal layer from the inside out.

[0008] The conductive fabric layer consists of, from bottom to top, a polyester fiber layer, a nickel-plated conductive layer, a highly conductive copper layer, and an anti-oxidation and corrosion layer.

[0009] Preferably, a conductive adhesive layer is provided between the metal-graphite-silicone block and the conductive cloth layer.

[0010] Preferably, a camouflage surface layer is provided on the surface of the elastic area ultra-wideband shielding draped structure; such as camouflage coating, adaptive camouflage coating, or biomimetic camouflage coating.

[0011] Alternatively, the camouflage surface layer may be a camouflage coating and a functional coating stacked sequentially, wherein the material of the camouflage coating is selected from camouflage coating, adaptive camouflage coating, and biomimetic camouflage coating.

[0012] Preferably, the functional coating is a microwave absorbing coating, and the material of the microwave absorbing coating is selected from ferrite microwave absorbing coating, carbon-based microwave absorbing coating, metal micro powder microwave absorbing coating, and nano microwave absorbing coating.

[0013] Preferably, the functional coating is a flame-retardant coating, and the material of the flame-retardant coating is selected from intumescent flame-retardant coatings, inorganic flame-retardant coatings, organic flame-retardant coatings, and water-based flame-retardant coatings.

[0014] Preferably, the polyester fiber layer in the conductive fabric layer has a thickness of 50μm-150μm; the nickel-plated conductive layer is a chemically deposited nickel layer formed on the polyester fiber layer, with a thickness of 20μm-100μm; the highly conductive copper layer is an electroplated copper layer formed on the nickel-plated conductive layer, with a thickness of 10μm-50μm; the anti-oxidation and corrosion layer has a thickness of 2μm-10μm; the graphite material layer has a thickness of 4~6μm; and the metal layer has a thickness of 1~3μm.

[0015] Preferably, the antioxidant corrosion layer in the conductive cloth layer contains boric acid.

[0016] Preferably, the metal layer is selected from one of a nickel layer, an aluminum silver-plated layer, and a copper silver-plated layer, and the conductive adhesive is selected from a nickel-based conductive adhesive. The nickel-based conductive adhesive refers to a conductive adhesive containing nickel metal.

[0017] Preferably, the metal-graphite-silicone block layer comprises a plurality of metal-graphite-silicone blocks arranged at equal center distances; the metal-graphite-silicone blocks have a plate-like structure.

[0018] Preferably, the gap between the metal-graphite-silicone block is filled with conductive tape, which includes a substrate and an adhesive. The substrate is silver-plated fiber cloth, and the adhesive is epoxy resin. The adhesive contains one of silver powder, nickel powder, and carbon powder.

[0019] This utility model discloses an elastic area ultra-wideband shielding drape structure. This structure provides a nickel-coated graphite silicone composite structure. By introducing metallic nickel and graphite into the silicone block, the electromagnetic shielding capability of the material can be significantly improved. Furthermore, a conductive cloth layer is provided on the nickel-coated graphite silicone layer. Due to the good mechanical strength and conductivity of the conductive cloth layer, the overall conductivity of the material can be effectively improved, avoiding the problem of detachment or instability caused by the high fluidity of the nickel-coated graphite silicone layer. The addition of the conductive cloth layer not only improves the durability and stability of the drape but also ensures the uniformity and efficient electromagnetic shielding effect of the material when applied over a large area. The specific technical solutions of the embodiments of this utility model are as follows:

[0020] The elastic area ultra-wideband shielding structure includes a nickel-plated graphite silicone layer and a conductive cloth layer.

[0021] Nickel-coated graphite silicone layer: The nickel-coated graphite silicone layer comprises multiple metal-graphite-silicone blocks arranged at equal center distances; the metal-graphite-silicone blocks are plate-shaped structures with a thickness of 2 mm; the bottom surface is a square plate with a side length of 5 mm to 60 mm; the gaps between adjacent nickel-coated graphite silicone blocks are filled with conductive tape, the conductive tape comprising a substrate and an adhesive, wherein the substrate is silver-plated fiber cloth, the adhesive is epoxy resin, and the adhesive contains one of silver powder, nickel powder, and carbon powder.

[0022] Nickel-coated graphite silicone layer, as the base material for elastic area ultra-wideband shielding drape structures, can adapt to complex surfaces and achieve uniform coverage, exhibiting excellent self-adaptability. The nickel-coated graphite silicone layer comprises a silicone block and a nickel-coated graphite layer. The nickel-coated graphite layer consists of a graphite material layer and a nickel layer; the nickel layer provides good conductivity and corrosion resistance, while the graphite material layer enhances the electromagnetic shielding effect, enabling the drape material to effectively absorb and reflect electromagnetic waves. The surface of the nickel-coated graphite silicone layer has a certain degree of adhesion, allowing it to be used as a substrate for bonding other electromagnetic shielding materials.

[0023] Conductive fabric layer: The conductive fabric layer can improve the mechanical strength of the coating material, avoid the problem of falling off due to the excessive fluidity of the silicone material, and at the same time provide additional conductivity to improve the electromagnetic shielding effectiveness.

[0024] The conductive fabric layer, from bottom to top, consists of: a polyester fiber layer, a nickel-plated conductive layer, a highly conductive copper layer, and an anti-oxidation and corrosion layer. A conductive adhesive layer is provided between the nickel-coated graphite silicone layer and the conductive fabric layer for bonding, ensuring a tight connection between the two. The conductive adhesive layer contains nickel-based conductive adhesive.

[0025] Camouflage surface layer: A camouflage surface layer is provided on the surface of the elastic area ultra-wideband shielding draped structure. The coating color is selected according to the environment, and it can fill the pores on the surface of the silicone block.

[0026] A camouflage coating and / or a functional coating are provided on the camouflage surface layer; the camouflage coating is selected from camouflage coatings, adaptive camouflage coatings, and biomimetic camouflage coatings. The functional coating can be a microwave absorbing coating, and the microwave absorbing coating material is one of polypyrrole and graphene. The functional coating can also be a flame-retardant coating, and the flame-retardant coating is selected from intumescent flame-retardant coatings, inorganic flame-retardant coatings, organic flame-retardant coatings, and water-based flame-retardant coatings.

[0027] Beneficial effects

[0028] 1. Excellent electromagnetic shielding performance: Through the composite structure of nickel-coated graphite silicone layer and conductive cloth layer, the coating can effectively block electromagnetic waves, improve electromagnetic shielding capability, and avoid the impact of electromagnetic interference on equipment.

[0029] 2. Good adaptability and coverage: The fluidity of the silicone block allows it to adapt to complex surfaces, especially curved or irregular surfaces, ensuring that the coating can evenly cover objects of various shapes and provide continuous electromagnetic shielding.

[0030] 3. Enhanced adhesion: The addition of the conductive cloth layer significantly enhances the adhesion between silicone blocks, solving the problem of traditional silicone materials easily falling off in large-area applications and ensuring the stability of the coating material during use.

[0031] 4. Corrosion resistance and long service life: Through the electroplating of the anti-oxidation nickel metal layer, the coating has stronger corrosion resistance and oxidation resistance, which can maintain excellent electromagnetic shielding performance during long-term use and extend service life.

[0032] 5. Simplified manufacturing process: This invention uses chemical deposition, electroplating and conductive adhesive bonding processes, which avoid the complex manufacturing process of traditional electromagnetic shielding materials, reduce production costs and improve production efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a high-performance ultra-wideband shielding drape structure according to a specific embodiment; wherein 1-a is a top view; 1-b is a front view;

[0034] Figure 2 This is a schematic diagram of the conductive fabric layer described in a specific embodiment;

[0035] Figure 3 The shielding effectiveness diagram of the nickel-coated graphite silicone block described in the specific implementation embodiment;

[0036] Figure 4 The shielding effectiveness diagram of the elastic area ultra-wideband shielding drape structure described in the specific implementation method is shown below;

[0037] The markings in the diagram represent: 1-Ni-coated graphite silicone block; 2-Conductive tape; 3-Ni-coated graphite silicone layer; 4-Conductive cloth layer; 5-Polyester fiber layer; 6-Ni-plated conductive layer; 7-Highly conductive copper layer; 8-Anti-oxidation and corrosion layer. Detailed Implementation

[0038] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0039] The following combination Figures 1-2 The structure of the present invention will be described in detail below:

[0040] This utility model discloses a high-performance ultra-wideband shielding drape structure, which is composed of a surface camouflage layer, a conductive cloth layer, and a nickel-coated graphite silicone block.

[0041] Example 1

[0042] The flexible area ultra-wideband shielding drape structure provided in this embodiment includes a nickel-plated graphite silicone layer and a conductive cloth layer.

[0043] 1. Preparation of nickel-coated graphite silica gel layer:

[0044] The conductive metal materials added in the existing technology have poor fluidity and are prone to agglomeration, which leads to a deterioration in shielding performance. This utility model uses composite material technology to cover the silicone block with a nickel-coated graphite layer to form a nickel-coated graphite silicone layer, which can improve the problem of agglomeration of metal materials in the silicone block in the existing technology.

[0045] The nickel-coated graphite silicone layer comprises multiple nickel-coated graphite silicone blocks arranged at equal center intervals; each nickel-coated graphite silicone block has a plate-like structure with a thickness of 2 mm; the bottom surface is a square plate with a side length of 5 mm to 60 mm; the gaps between adjacent nickel-coated graphite silicone blocks are filled with conductive tape. The conductive tape is selected from conductive tape comprising a substrate and an adhesive, wherein the substrate is silver-plated fiber cloth, the adhesive is epoxy resin, and the adhesive contains nickel powder.

[0046] The nickel-coated graphite silica gel block includes a silica gel block, a graphite material layer, and a nickel layer;

[0047] The silicone block is made from type A silicone block (silicon content ≥90%) and manufactured using a mold forming process. The shape and size of the silicone block can be adjusted according to actual needs to adapt to different application scenarios.

[0048] The graphite material layer is coated onto the surface of the silicone block using an adhesive. The coating method involves mixing graphite powder with an adhesive (selected from polyurethane or epoxy resin) at a mass ratio of 3:1 for 30 minutes to 1 hour, allowing the graphite material to fully adhere to the silicone block surface. After uniform mixing, the adhesive needs to be removed using hot air drying or an oven-drying device. Heat curing can enhance the adhesion of the silicone block. The heating temperature and time are adjusted according to the requirements of the selected adhesive. The heating temperature is 150℃~180℃, and the heating time is 1~2 hours. After heat curing, the surface of the resulting product is polished.

[0049] The nickel layer is formed by depositing nickel ions onto the surface of a graphite material layer using chemical deposition. The nickel layer is deposited at a nickel to graphite mass ratio of 1:8. The chemical deposition process is as follows:

[0050] Pretreatment: The surface of the graphite material layer is cleaned and activated to improve the deposition effect.

[0051] Preparation of sedimentation solution: Dissolve nickel salt (such as nickel sulfate, nickel chloride) and reducing agent (such as sodium hypophosphite) in deionized water in a certain proportion, add complexing agent (such as sodium citrate) and buffer (such as ammonia) to adjust the pH value to 8-10.

[0052] Deposition process: The graphite material is immersed in the deposition solution, the deposition temperature is controlled at 80-90°C, and the deposition time is 30-60 minutes. Nickel ions are uniformly deposited on the graphite surface through a chemical reduction reaction.

[0053] Post-processing: Remove the sample, wash with deionized water and dry to obtain a uniform nickel layer on the surface.

[0054] 2. Design of conductive fabric layer

[0055] The conductive fabric layer comprises, from bottom to top, a polyester fiber layer, a nickel-plated conductive layer, a highly conductive copper layer, and an anti-oxidation and corrosion layer. The polyester fiber layer has a thickness of 50μm-150μm, the conductive base layer has a thickness of 20μm-100μm, the highly conductive copper layer has a thickness of 10μm-50μm, and the anti-oxidation and corrosion layer has a thickness of 2μm-10μm. The anti-oxidation and corrosion layer contains boric acid.

[0056] The polyester fiber layer adopts a conventional design and undergoes antistatic and waterproof treatments to enhance its functionality. Specific technical parameters are as follows:

[0057] Polyester fiber layer fiber diameter: 15 μm;

[0058] Polyester fiber layer thickness: 0.3 mm;

[0059] The areal density of the polyester fiber layer is 100 g / m².

[0060] Tensile strength of the polyester fiber layer: 80 MPa;

[0061] Elongation at break of the polyester fiber layer: 20%;

[0062] Thermal stability of the polyester fiber layer: 180°C;

[0063] The air permeability of the polyester fiber layer is 30 cm³ / (cm²·s).

[0064] The nickel-plated conductive layer is deposited on the polyester fiber layer by chemical deposition. The deposition method is as follows: nickel sulfate solution (NiSO4) is used as the nickel source of the deposition solution, with a concentration of 20 g / L to 50 g / L and a pH value of 4.5 to 5.5. The ambient temperature is maintained at 60°C to 80°C during the deposition process, and the deposition time is 30 to 60 minutes.

[0065] The highly conductive copper layer is prepared on a nickel-plated conductive layer by an electroplating process. The electroplating process is as follows: copper sulfate (CuSO4) solution is used as the copper source in the electroplating solution, with a concentration of 200 g / L-300 g / L; sodium chloride is used as the flux, with a concentration of 50 g / L-100 g / L; the pH value of the electroplating solution is 0.8-1.0; the electroplating current density is 2 A / dm²-5 A / dm²; the electroplating temperature is 20°C-30°C; and the electroplating time is 30 minutes to 2 hours.

[0066] The anti-oxidation and corrosion layer is prepared on a highly conductive copper layer by electroplating. The electroplating process is as follows: the electroplating solution consists of nickel sulfate (NiSO4) and nickel chloride (NiCl2) at a concentration of 200 g / L to 300 g / L. In addition, boric acid (30 g / L) is added to improve the crystallinity and hardness of the nickel layer. The pH value of the electroplating solution is 4.0 to 4.5, the current density for nickel metal electroplating is 1 A / dm² to 3 A / dm², the electroplating temperature is 50°C to 60°C, and the electroplating time for the nickel metal layer is 30 to 60 minutes.

[0067] 3. Bonding of the conductive cloth layer to the nickel-coated graphite silicone layer:

[0068] A conductive adhesive layer is provided between the nickel-coated graphite silicone layer and the conductive fabric layer for bonding, ensuring a tight connection between the two. The conductive adhesive layer not only has strong adhesion but also maintains current conductivity, ensuring that the draped material will not peel off due to insufficient adhesion during use. The conductive adhesive layer contains nickel-based conductive adhesive.

[0069] 4. Camouflage surface layer

[0070] A camouflage surface layer is provided on the surface of the elastic area ultra-wideband shielding drape structure. A paint of a similar color is selected according to the environment, and it can also fill the pores on the surface of the silicone block.

[0071] A camouflage coating and / or a functional coating are provided on the camouflage surface layer; the camouflage coating is selected from camouflage coatings, adaptive camouflage coatings, and biomimetic camouflage coatings; the functional coating can be a microwave absorbing coating, and the microwave absorbing coating material is graphene. The functional coating can also be a flame-retardant coating, and the flame-retardant coating is an inorganic flame-retardant coating.

[0072] Example 2

[0073] The same technical solution as in Example 1 is adopted, except that:

[0074] 1. Preparation of aluminum silver-plated-graphite-silicone layer:

[0075] The conductive metal materials added in the prior art have poor fluidity and are prone to agglomeration, which leads to a deterioration in shielding performance. This invention uses an aluminum-silver-graphite layer to cover the silicone block to form an aluminum-silver-graphite-silicone layer, which can improve the problem of agglomeration of the metal material in the silicone block in the prior art.

[0076] The aluminum silver-plated graphite-silicone layer comprises multiple aluminum silver-plated graphite-silicone blocks arranged at equal center-to-center intervals; each aluminum silver-plated graphite-silicone block has a plate-like structure with a thickness of 2 mm; the bottom surface is a square plate with a side length of 5 mm to 60 mm; the gaps between adjacent aluminum silver-plated graphite-silicone blocks are filled with conductive tape. The conductive tape comprises a substrate and an adhesive, wherein the substrate is silver-plated fiber cloth, and the adhesive is epoxy resin containing nickel powder.

[0077] The aluminum-silver-graphite-silicone block includes a silicone block, a graphite material layer, and an aluminum-silver-plated layer;

[0078] The silicone block is made from type A silicone block (silicon content ≥90%) and manufactured using a mold forming process. The shape and size of the silicone block can be adjusted according to actual needs to adapt to different application scenarios.

[0079] The graphite material layer is coated onto the surface of the silicone block using an adhesive. The coating method involves mixing graphite powder with an adhesive (selected from polyurethane or epoxy resin) at a mass ratio of 3:1 for 30 minutes to 1 hour, allowing the graphite material to fully adhere to the silicone block surface. After uniform mixing, the adhesive needs to be removed using hot air drying or an oven-drying device. Heat curing can enhance the adhesion of the silicone block. The heating temperature and time are adjusted according to the requirements of the selected adhesive. The heating temperature is 150℃~180℃, and the heating time is 1~2 hours. After heat curing, the surface of the resulting product is polished.

[0080] The aluminum-silver plating layer is formed by chemically depositing silver onto the surface of a graphite material layer. The aluminum-silver plating layer is deposited at a ratio of 1:5.

[0081] Example 3

[0082] The same technical solution as in Example 1 is adopted, except that:

[0083] 1. Preparation of copper-silver-graphite-silicone layer:

[0084] The conductive metal materials added in the prior art have poor fluidity and are prone to agglomeration, which leads to poor shielding performance. This invention uses a copper-plated silver-graphite layer to cover the silicone block to form a copper-plated silver-graphite-silicone layer, which can improve the problem of metal material agglomeration in the silicone block in the prior art.

[0085] The copper-silver-graphite-silicone layer comprises multiple copper-silver-graphite-silicone blocks arranged at equal center-to-center intervals; each copper-silver-graphite-silicone block has a plate-like structure with a thickness of 2 mm; the bottom surface is a square plate with a side length of 5 mm to 60 mm; the gaps between adjacent copper-silver-graphite-silicone blocks are filled with conductive tape. The conductive tape comprises a substrate and an adhesive, wherein the substrate is silver-plated fiber cloth, and the adhesive is epoxy resin containing silver powder.

[0086] The copper-silver-graphite-silicone block includes a silicone block, a graphite material layer, and a copper-silver-plated layer;

[0087] The silicone block is made from type A silicone block (silicon content ≥90%) and manufactured using a mold forming process. The shape and size of the silicone block can be adjusted according to actual needs to adapt to different application scenarios.

[0088] The copper-silver-graphite layer includes a graphite material layer and a copper-silver-plated layer;

[0089] The graphite material layer is coated onto the surface of the silicone block using an adhesive. The coating method involves mixing graphite powder with an adhesive (selected from polyurethane or epoxy resin) at a mass ratio of 3:1 for 30 minutes to 1 hour, allowing the graphite material to fully adhere to the silicone block surface. After uniform mixing, the adhesive needs to be removed using hot air drying or an oven-drying device. Heat curing can enhance the adhesion of the silicone block. The heating temperature and time are adjusted according to the requirements of the selected adhesive. The heating temperature is 150℃~180℃, and the heating time is 1~2 hours. After heat curing, the surface of the resulting product is polished.

[0090] The copper-plated silver layer is formed by chemically depositing silver onto the surface of the graphite material layer to create an aluminum-plated silver layer. The aluminum-plated silver layer is deposited at a ratio of 1:5.

[0091] Test Example 1

[0092] The performance of the nickel-coated graphite silica gel block prepared in Example 1 is tested below.

[0093] Test subject: Nickel-coated graphite silicone block prepared in Example 1, wherein the substrate is silicone block and the conductive material is nickel-coated graphite layer;

[0094] Test items, test standards, and test results:

[0095] (1) Density test: The test standard adopted is ASTM D792, and the density of the test object is 2±0.25g / cm³.

[0096] (2) Hardness test: The test standard adopted is ASTM S2240. The hardness of the test object is 65±7 Shore A.

[0097] (3) Tensile strength test: The test standard adopted is ASTM D412, and the tensile strength of the test object is 200 PSI.

[0098] (4) Tensile strength test: The test standard adopted is ASTM D412, and the tensile strength of the test object is >100%.

[0099] (5) Compression set test: The test standard adopted is ASTM D395, and the compression set of the test object was found to be 21%.

[0100] (6) Volume resistivity test: The test standard adopted is Mil-83528. The volume resistivity of the test object is 0.1Ω-cm.

[0101] (7) Durability test: The test standard adopted is GB / T 4744-2011. The test results showed that the durability of the test object was unchanged after 48 hours of testing.

[0102] (8) Shielding effectiveness test: The test standards adopted were Mil-83528 and Mil-STD-185. The durability of the test object was found to be ≥75 dB. The shielding effectiveness test diagram is shown below. Figure 1 As shown.

[0103] Test Example 2

[0104] The following section presents performance tests on the elastic area ultra-wideband shielding structure prepared in Example 1.

[0105] Test object: The elastic area ultra-wideband shielding drape structure prepared in Example 1;

[0106] Test items, test standards, and test results:

[0107] (1) Density test: The test standard adopted is GB / T 533-2008. The density of the test object was found to be 2 g / cm³.

[0108] (2) Hardness test: The test standard adopted is GB / T 531.1-2008. The hardness of the test object is 75 Shore A.

[0109] (3) Tensile strength test: The test standard adopted is GB / T 528-2009. The tensile strength of the test object was found to be 2.2MPa.

[0110] (4) Tensile strength test: The test standard adopted is GB / T 528-2009. The tensile strength of the test object was 141% after testing.

[0111] (5) Volume resistivity test: The test standard adopted is GB / T 36763-2018. The volume resistivity of the test object is 0.06Ω-cm.

[0112] (7) Vertical burning (3mm) test: The test standard adopts UL94, and the durability of the test object is HB after testing.

[0113] (8) Shielding effectiveness test: The test standard adopted is GB / T 18884-2002. The durability of the test object was found to be ≥65 dB. The shielding effectiveness test diagram is shown below. Figure 2 As shown.

Claims

1. An elastic area ultra-wideband shielding structure, characterized in that, The elastic area ultra-wideband shielding hanging structure from top to bottom is a metal-graphite-silica gel block layer and a conductive cloth layer. The metal-graphite-silica gel block layer from inside to outside is silica gel block, graphite material layer and metal layer. The conductive cloth layer from bottom to top is polyester fiber layer, nickel-plated conductive layer, high-conductive copper layer and anti-oxidation corrosion layer.

2. The elastic area EAB shielded patch structure according to claim 1, wherein: The metal-graphite-silica gel block and the conductive cloth layer are provided with a conductive glue layer, and the conductive glue layer contains nickel-based conductive glue.

3. The elastic area EAB shielded patch structure of claim 1, wherein: A camouflage surface layer is arranged on the surface of the elastic area ultra-wideband shielding hanging structure; the camouflage surface layer is a camouflage coating, and the camouflage coating is selected from a camouflage coating, a self-adaptive camouflage coating and a bionic camouflage coating. Or the camouflage surface layer is a camouflage coating and a functional coating arranged in sequence, and the camouflage coating is selected from a camouflage coating, a self-adaptive camouflage coating and a bionic camouflage coating.

4. The elastic area EAB shielded patch structure according to claim 3, wherein: The functional coating is a wave-absorbing coating, and the wave-absorbing coating is selected from a ferrite wave-absorbing coating, a carbon-based wave-absorbing coating, a metal micro-powder wave-absorbing coating and a nano wave-absorbing coating.

5. The elastic area EAB shielded patch structure according to claim 3, wherein: The functional coating is a flame-retardant coating, and the flame-retardant coating is selected from an intumescent flame-retardant coating, an inorganic flame-retardant coating, an organic flame-retardant coating and a water-based flame-retardant coating.

6. The elastic area EAB shielded patch structure of claim 1, wherein: The thickness of the polyester fiber layer in the conductive cloth layer is 50 μm-150 μm; the nickel-plated conductive layer is a chemical deposition nickel layer prepared on the polyester fiber layer, and the thickness is 20 μm-100 μm; the high-conductive copper layer is an electroplated copper layer prepared on the nickel-plated conductive layer, and the thickness is 10 μm-50 μm; the anti-oxidation corrosion layer has a thickness of 2 μm-10 μm; the graphite material layer has a thickness of 4-6 μm; and the metal layer has a thickness of 1-3 μm.

7. The elastic area EAB shielded patch structure of claim 1, wherein: The anti-oxidation corrosion layer in the conductive cloth layer contains boric acid.

8. The elastic area EAB shielded patch structure of claim 1, wherein: The metal layer is selected from one of a nickel layer, an aluminum-silver-plated layer and a copper-silver-plated layer.

9. The elastic area EAB shielded patch structure of claim 1, wherein: The metal-graphite-silica gel block layer comprises a plurality of metal-graphite-silica gel blocks arranged at equal center distances; and the metal-graphite-silica gel block is a plate-shaped structure.

10. The elastic area EAB shielded structure of claim 9, wherein: The gaps between the metal-graphite-silica gel blocks are filled with a conductive adhesive tape, and the conductive adhesive tape comprises a substrate and an adhesive, wherein the substrate is silver-plated fiber cloth, and the adhesive contains one of silver powder, nickel powder and carbon powder.

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