Aramid-based corrosion-resistant insulating paper

Abstract

The utility model provides a kind of aramid-based corrosion-resistant insulating paper, it is related to the field of insulating paper, including: insulating layer and framework layer, the insulating layer includes aramid fiber and carbon fiber, framework layer includes aramid short-cut fiber, basalt fiber and ceramic fiber and sedimentation fiber, while being equipped with conductive layer on the surface of framework layer, the surface of conductive layer is equipped with flame-retardant adhesive tape and tensile strip.The utility model has high temperature resistance, corrosion resistance, ultraviolet resistance and anti-static and electromagnetic shielding performance, improve the service life of insulating paper.

Description

Technical Field

[0001] This utility model relates to the field of insulating paper technology, specifically to an aramid-based corrosion-resistant insulating paper. Background Technology

[0002] Insulating paper is a special type of paper with excellent electrical insulation properties. It is widely used in electrical and electronic equipment to ensure that current flows in a specific path, preventing problems such as short circuits and electric shocks. Its main functions are to provide electrical insulation and mechanical support. It has the function of electrical insulation, which can prevent current from passing through paths that should not be passed, avoiding short circuits and electric shocks. It also has the function of thermal insulation, which can resist the loss of electrical performance under high temperature environments and protect equipment from overheating. Then it can also provide physical support, enhancing the stability of the equipment structure. Finally, it has dielectric properties, which can ensure good dielectric constant and dielectric strength under the action of an electric field. A search revealed existing technology (publication number: CN222809784U), which describes "a high-insulation composite insulating paper, relating to the field of insulating paper technology, comprising a bottom layer, a tensile layer on top of the bottom layer, an intermediate layer on top of the tensile layer, a waterproof layer on top of the intermediate layer, a surface layer on top of the waterproof layer, and multiple first patterns on the bottom of the bottom layer. In this invention, the waterproof layer is made of polytetrafluoroethylene material with a thickness of 5-20 micrometers, effectively preventing moisture penetration in humid environments and maintaining the electrical insulation performance and mechanical strength of the insulating paper. The tensile layer is made of glass fiber material with a thickness of 10-50 micrometers, providing additional mechanical strength and durability, preventing the insulating paper from tearing under stress during use. Furthermore, the surface layer, intermediate layer, and bottom layer enhance the mechanical strength and structural stability of the entire composite material, while providing basic electrical insulation performance, thereby improving the performance of this high-insulation composite insulating paper."

[0003] While existing high-insulation composite insulating paper achieves insulation and waterproofing effects, it still has some shortcomings in practical applications: existing insulating paper has poor corrosion resistance and high temperature resistance in actual use, which greatly reduces the service life of the insulating paper when electrical equipment is used in such environments. It also has the disadvantages of poor flame retardancy and UV resistance, making it unsuitable for a variety of complex environments. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, an aramid-based corrosion-resistant insulating paper is provided to solve the problems mentioned in the background.

[0005] To achieve the above objectives, an aramid-based corrosion-resistant insulating paper is provided, comprising: an insulating layer and a skeleton layer. The insulating layer comprises aramid fibers and carbon fibers, and the skeleton layer comprises chopped aramid fibers, basalt fibers, ceramic fibers, and precipitated fibers. A conductive layer is provided on the surface of the skeleton layer, and a flame-retardant adhesive strip and a tensile strip are provided on the surface of the conductive layer.

[0006] Furthermore, the insulating layer is a composite material composed of aramid fibers and carbon fibers.

[0007] Furthermore, the aramid chopped fibers and precipitated fibers are mixed in a ratio of 1.4:1 to 1.8:1, with a fiber length of 6-8 mm.

[0008] Furthermore, the thickness of the insulating layer is 10-20 micrometers.

[0009] Furthermore, the thickness of the skeleton layer is 25-36 micrometers.

[0010] Furthermore, the thickness of the conductive layer is 15-20 micrometers.

[0011] Furthermore, the flame-retardant adhesive strip penetrates the thickness of the insulation layer, the skeleton layer, and the conductive layer, and the interior of the flame-retardant adhesive strip is designed with a honeycomb structure.

[0012] Furthermore, the tensile strip is made of glass fiber, and the flame-retardant adhesive strip is located between the tensile strips.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The insulation layer is made of aramid fiber and carbon fiber composite. Aramid carbon fiber composite material is a high-performance material that combines the advantages of aramid and carbon fiber. It has the characteristics of high strength, light weight and corrosion resistance. At the same time, the aramid short fiber, basalt fiber and ceramic fiber included in the skeleton layer also have good corrosion resistance and high temperature resistance. The use of basalt fiber enhances the high temperature resistance and thermal shock stability of the insulation paper, while also enhancing its durability, weather resistance and UV resistance, thereby extending the service life of the insulation paper and expanding the operating environment of electrical equipment using this material.

[0015] 2. The conductive layer enhances the overall antistatic and electromagnetic shielding performance of the material while avoiding the risk of partial discharge. The skeleton layer and tensile strips strengthen the paper's high strength and tear resistance. Furthermore, the flame-retardant adhesive strips enhance the flame-retardant effect of the insulating paper, making it suitable for various complex environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the insulating paper according to an embodiment of the present utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the insulating paper in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the insulating layer structure according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the skeleton layer structure of an embodiment of the present utility model.

[0020] In the diagram: 1. Insulation layer; 11. Aramid fiber; 12. Carbon fiber; 2. Skeleton layer; 21. Aramid chopped fiber; 22. Basalt fiber; 23. Ceramic fiber; 24. Precipitated fiber; 3. Conductive layer; 4. Flame retardant strip; 5. Tensile strip. Detailed Implementation

[0021] Reference Figures 1 to 4 As shown, this utility model provides an aramid-based corrosion-resistant insulating paper, comprising: an insulating layer 1 and a skeleton layer 2. The insulating layer 1 includes aramid fibers 11 and carbon fibers 12. The skeleton layer 2 includes aramid chopped fibers 21, basalt fibers 22, ceramic fibers 23, and precipitated fibers 24. A conductive layer 3 is provided on the surface of the skeleton layer 2. A flame-retardant adhesive strip 4 and a tensile strip 5 are provided on the surface of the conductive layer 3.

[0022] Specifically, conductive layer 3 is achieved by adding conductive materials such as silicon carbide.

[0023] It should be noted that the insulating layer 1 can also be made of aramid pulp to fill the gaps between layers, forming a dense structure and maintaining stable dielectric properties under high temperature and high humidity conditions.

[0024] Specifically, aramid pulp is a composite material reinforcing fiber obtained by surface microfiberization treatment of aramid fiber 11. Its surface exhibits a fluffy ultrafine microfiber structure, and has characteristics such as large specific surface area, high temperature resistance (long-term service temperature can reach 250℃) and corrosion resistance.

[0025] Specifically, precipitated fibers 24 are synthetic polymer materials with fibrous or membrane-like structures, typically 1-several micrometers thick and ranging in length from tens of micrometers to several millimeters. Their morphology resembles tree branches and possesses natural adhesive properties. They are primarily formed by injecting a polymer solution into a high-speed stirred coagulation bath, where they rapidly solidify under strong shear. Specific methods include: achieving efficient mixing and precipitation of the solution and coagulation bath through specially designed structures; or injecting the polymer solution into the coagulation bath in a thin stream, utilizing shear force to elongate and form fibers.

[0026] Specifically, ceramic fiber 23 can be replaced with graphite fiber or metal fiber, while aramid chopped fiber 21, basalt fiber 22, ceramic fiber 23 and precipitated fiber 24 are composite materials through blending, compression molding or autoclave molding processes.

[0027] like Figures 2 to 3 In this structure, the insulating layer 1 is a composite material composed of aramid fiber 11 and carbon fiber 12. Aramid chopped fiber 21 and precipitated fiber 24 are mixed in a ratio of 1.4:1 to 1.8:1, with a fiber length of 6-8 mm. The thickness of the insulating layer 1 is 10-20 micrometers, the thickness of the skeleton layer 2 is 25-36 micrometers, the thickness of the conductive layer 3 is 15-20 micrometers, and the flame-retardant adhesive strip 4 penetrates the thickness of the insulating layer 1, the skeleton layer 2, and the conductive layer 3. The flame-retardant adhesive strip 4 has a honeycomb structure inside, and the tensile strip 5 is made of glass fiber, with the flame-retardant adhesive strip 4 located between the tensile strips 5.

[0028] Specifically, the composite material of aramid chopped fibers 21 and precipitated fibers 24 has high strength and tear resistance.

[0029] Specifically, flame-retardant strip 4 achieves enhanced corrosion resistance through hot-press curing. Flame-retardant strip 4 uses silicone rubber as a base material, adding rhodium, iridium compounds, or platinum complexes to form a flame-retardant composition, suitable for the manufacture of cable, electrical equipment insulation, and fire-resistant profiles.

[0030] Specifically, the glass fiber tensile strip 5 has excellent tensile and bending strength, making it suitable as a reinforcing material for composite materials, while also possessing corrosion resistance and heat resistance.

[0031] In use, the insulation layer is made of aramid fiber and carbon fiber composite. Aramid carbon fiber composite material is a high-performance material that combines the advantages of aramid and carbon fiber, possessing characteristics such as high strength, light weight, and corrosion resistance. At the same time, the aramid short-cut fiber, basalt fiber, and ceramic fiber included in the skeleton layer also have good corrosion resistance and high temperature resistance. The use of basalt fiber enhances the high temperature resistance and thermal shock stability of the insulation paper, while also improving its durability, weather resistance, and UV resistance, thereby extending the service life of the insulation paper and expanding the operating environment of electrical equipment using this material. The conductive layer improves the overall antistatic and electromagnetic shielding performance of the material, while avoiding the risk of partial discharge. The skeleton layer and tensile strips enhance the high strength and tear resistance of the paper. In addition, the flame-retardant strips enhance the flame-retardant effect of the insulation paper, making it suitable for various complex environments.

[0032] The aramid-based corrosion-resistant insulating paper of this invention can effectively solve the problems mentioned in the background technology. It achieves high temperature resistance, corrosion resistance, ultraviolet resistance, antistatic and electromagnetic shielding properties on the basis of existing aramid-based corrosion-resistant insulating paper technology, thereby improving the service life of the insulating paper.

Claims

1. An aramid-based corrosion-resistant insulating paper, comprising: The insulating layer (1) and the skeleton layer (2) are characterized in that: the insulating layer (1) includes aramid fiber (11) and carbon fiber (12), the skeleton layer (2) includes aramid chopped fiber (21), basalt fiber (22) and ceramic fiber (23) and precipitated fiber (24), and a conductive layer (3) is provided on the surface of the skeleton layer (2), and a flame-retardant adhesive strip (4) and a tensile strip (5) are provided on the surface of the conductive layer (3).

2. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The insulating layer (1) is a composite material composed of aramid fiber (11) and carbon fiber (12).

3. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The aramid chopped fibers (21) and precipitated fibers (24) are mixed in a ratio of 1.4:1 to 1.8:1, with a fiber length of 6-8 mm.

4. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The thickness of the insulating layer (1) is 10-20 micrometers.

5. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The thickness of the skeleton layer (2) is 25-36 micrometers.

6. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The thickness of the conductive layer (3) is 15-20 micrometers.

7. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The flame-retardant adhesive strip (4) penetrates the thickness of the insulating layer (1), the skeleton layer (2) and the conductive layer (3), and the interior of the flame-retardant adhesive strip (4) is designed with a honeycomb structure.

8. The aramid-based corrosion-resistant insulating paper according to claim 1, characterized in that, The tensile strip (5) is made of glass fiber, and the flame-retardant adhesive strip (4) is located between the tensile strips (5).

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