Highly reinforced tensile mica tape

Abstract

The utility model discloses a highly reinforced tensile mica tape, which is of a multi-layer composite structure and comprises a mica paper base tape, a structure reinforcing layer is formed on the surface of the mica paper base tape, a base body of the structure reinforcing layer is a reinforcing material layer, the reinforcing material layer is a net-shaped fiber fabric, a tensile reinforcing body is formed on the net-shaped fiber fabric, and the surface of the mica paper base tape is provided with the tensile reinforcing body. The tensile reinforcements are reinforced fiber bundles which are matched with the length of the length mica tape and are kept continuous, and the reinforced fiber bundles are arranged in parallel at intervals along the length direction of the mica paper base tape; a mica pulp sheet layer is further formed on the surface of the reinforcing material layer, and reinforcing fiber cloth and a closed surface layer are sequentially formed on the surface of the mica pulp sheet layer. The mica tape provided by the utility model can meet the fitting performance of the mica tape under the conditions of cable continuous bending, external force impact and thermal strain impact under the condition of meeting the electrical insulation performance of a wire rod.

Description

Technical Field

[0001] The utility model relates to the field of insulating mica products, and particularly to a highly reinforced tensile mica tape. Background Art

[0002] Mica tapes are widely used in the fields of electrical materials such as electronic components, capacitors, cables, and winding due to their excellent insulation performance, outstanding heat resistance, fire resistance, corrosion resistance, and mechanical strength. At the same time, their high-temperature resistance makes them an important isolation material for high-temperature electrical appliances.

[0003] With the development of the power industry, modern power generation equipment and power transmission equipment are gradually developing towards high voltage and large capacity, posing higher requirements for specific properties of mica tapes, such as high-temperature tolerance, strength performance, insulation performance, etc. This makes traditional mica tapes unable to meet the application requirements of some high-end and special applications in terms of tensile strength, high-temperature resistance, etc. There are also technologies that use reinforcing materials to strengthen the structure of mica tapes, but these types of reinforcing materials mainly include two categories: fiber cloth and film materials. The fiber cloth is mostly a simple fiberglass cloth; while the film materials mainly include polyimide film and polyester film. However, these three types of materials have not reached a satisfactory level in terms of heat resistance, mechanical properties, and electrical insulation performance, restricting the development of related products towards high voltage, large capacity, and high performance. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a highly reinforced tensile mica tape to solve the deficiencies in the above background art.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A highly reinforced tensile mica tape, which is a multi-layer composite structure, includes a mica paper base tape. A structure reinforcement layer is formed on the surface of the mica paper base tape. The matrix of the structure reinforcement layer is a reinforcing material layer. The reinforcing material layer is a mesh fiber fabric. A tensile reinforcement body is formed on the mesh fiber fabric. The tensile reinforcement body is a continuous reinforcing fiber bundle that matches the length of the mica tape. The reinforcing fiber bundles are arranged in parallel at intervals along the length direction of the mica paper base tape. A layer of mica pulp sheet layer is also formed on the surface of the reinforcing material layer, and a reinforcing fiber cloth and a sealing surface layer are sequentially formed on the surface of the mica pulp sheet layer.

[0007] As a further limitation, the mica paper base tape is muscovite paper, phlogopite paper, or synthetic mica paper.

[0008] As a further limitation, the composite mica tape is hot-pressed and formed for the interlayer structure with a phenolic epoxy tung oil maleic anhydride adhesive.

[0009] As a further limitation, the overall thickness range of the tensile mica tape is 0.15 mm to 0.30 mm; the sum of the thicknesses of the mica paper base tape and the mica pulp sheet layer accounts for 45 to 60% of the thickness of the tensile mica tape.

[0010] As a further limitation, the mesh fiber fabric is a mesh structure woven from high-strength glass fiber or ceramic fiber, and the mesh size thereof is 0.5 to 1.0 mm.

[0011] As a further limitation, the bundle diameter of the reinforcing fiber bundle is 1.5 to 2 times the yarn diameter of the warp and weft yarns of the woven mesh fiber fabric. The reinforcing fiber bundle is formed into the mesh fiber fabric in a threading manner and is formed into one body with the mesh fiber fabric.

[0012] As a further limitation, the distance between adjacent reinforcing fiber bundles in the width direction of the mica paper base tape is 3 to 5 mm.

[0013] As a further limitation, the reinforcing fiber bundle is formed by bundling one or a combination of glass fiber filaments, aramid fiber filaments, and carbon fiber filaments.

[0014] As a further limitation, short-cut polyaniline nanofibers are also dispersed in the mica pulp sheet layer.

[0015] As a further limitation, the reinforcing fiber cloth is an alkali-free glass fiber cloth.

[0016] As a further limitation, the sealing surface layer is mica paper.

[0017] As a further limitation, the sealing surface layer is one of a PE film, a PET film, and a PVDF film.

[0018] Beneficial effects: Based on the mica paper base tape, the highly reinforced tensile mica tape of the present utility model significantly improves the tensile strength of the mica tape through the setting of the structural reinforcement layer. The setting of the structural reinforcement layer enhances the tensile performance of the mica tape in the length direction and effectively prevents the occurrence of fracture or damage phenomena that may occur during use; the mica pulp sheet layer formed on the surface of the reinforcing material layer can meet the fitting performance of the mica tape under the conditions of continuous bending, external force impact, and thermal strain impact of the wire while satisfying the electrical insulation performance of the wire, so that it can meet the requirements of high-end and special applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present utility model.

[0020] Wherein: 1. Sealing surface layer; 2. Reinforcing fiber cloth; 3. Mica pulp sheet layer; 4. Reinforcing material layer; 5. Tensile reinforcement body; 6. Mica paper base tape. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific drawings.

[0022] See Figure 1 A preferred embodiment of a highly enhanced tensile mica tape according to a preferred embodiment of the present utility model. In this embodiment, the main structure of the tensile mica tape is a mica paper base tape 6, and the mica paper base tape 6 is a synthetic mica paper. Its upper surface is sized with a phenolic epoxy tung oil maleic anhydride adhesive to obtain an adhesive layer, and a structural reinforcement layer, a mica pulp layer 3, a reinforcing fiber cloth 2 and a sealing surface layer 1 are sequentially formed on the adhesive layer. The thickness range of the whole tensile mica tape after forming is 0.23 - 0.27 mm; and the sum of the thicknesses of the mica paper base tape 6 and the mica pulp layer 3 is 55 - 60% of the overall thickness of the tensile mica tape. The combination of the mica paper base tape 6 and the mica pulp layer 3 is used to meet the electrical insulation performance of the mica tape, so as to meet the application requirements in the directions of high voltage, large capacity and high performance.

[0023] In this embodiment, the structural reinforcement layer, as an internal reinforcement structure, includes a reinforcing material layer 4 as a matrix. The reinforcing material layer 4 is a mesh fiber fabric, and the mesh fiber fabric is a mesh surface structure woven from high-strength glass fiber or ceramic fiber. The mesh holes of its mesh surface structure are uniform, and the size of the mesh holes is controlled within the range of 0.5 - 1.0 mm. The structural reinforcement layer also includes a tensile reinforcement body 5 for further increasing the tensile performance of the tensile mica tape in the length direction. The tensile reinforcement body 5 is a continuous reinforcing fiber bundle that matches the length of the length mica tape. The reinforcing fiber bundle of the tensile reinforcement body 5 is formed by bundling glass fiber filaments, and its bundle diameter is 1.8 times the warp and weft yarn diameters of the mesh fiber fabric used for weaving the reinforcing material layer 4. The tensile reinforcement body 5 is formed in the mesh fiber fabric by a threading method and is formed into an integral structure with the reinforcing material layer 4 in this way. When the tensile reinforcement body 5 is formed on the reinforcing material layer 4, it is arranged parallel and spaced along the length direction of the mica paper base tape 6, and the spacing between adjacent reinforcing fiber bundles in the width direction of the mica paper base tape 6 is controlled within 3 - 5 mm.

[0024] Thus, a stable and reliable connection relationship is formed between the tensile reinforcement body 5 and the reinforcing material layer 5, ensuring that the tensile reinforcement body 5 will not fall off the reinforcing material layer 5 when enhancing the tensile performance.

[0025] On the outer surface of the reinforcing material layer 5, a mica slurry layer 3 is formed. The mica flake particles in the mica slurry layer 3 are of uniform size, and the aspect ratio of the mica flake particles is controlled within the range of 50 to 100 to improve the interlayer bonding strength of the mica slurry layer 3. In addition, in order to further enhance the overall structural performance of the mica slurry layer 3, short-cut polyaniline nanofibers are also dispersed in the mica slurry layer 3. These short-cut polyaniline nanofibers are uniformly dispersed in the gaps between the mica flake particles and can form a spatial cross-linked structure in the adhesive layer by passing through the reinforcing material layer 4 during the pressure molding process of the mica tape to lock the mica flakes in the mica slurry layer 3.

[0026] The reinforcing fiber cloth 2 formed on the outer surface of the mica slurry layer 3 is an alkali-free glass fiber cloth. In this embodiment, the reinforcing material layer 4 and the reinforcing fiber cloth 2 in the structural reinforcement layer are used to provide the basis and overall mechanical reinforcement for the mica tape; the setting of the tensile reinforcement body 5 enables the tensile mica tape to evenly disperse stress when subjected to external forces, preventing the occurrence of stress concentration phenomena, thereby improving the service performance of the tensile mica tape.

[0027] The sealing surface layer 1 on the outer surface of the reinforcing fiber cloth 2 can be selected as one of mica paper, PE film, PET film, PVDF film or a combination of mica paper and any one of PE film, PET film, PVDF film in different embodiments, for improving the surface performance and overall aesthetics of the tensile mica tape.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly reinforced tensile mica tape, characterized in that: It is a multi-layer composite structure, including a mica paper base tape, a structural reinforcement layer is formed on the surface of the mica paper base tape, the matrix of the structural reinforcement layer is a reinforcing material layer, the reinforcing material layer is a mesh fiber fabric, a tensile reinforcement is formed on the mesh fiber fabric, the tensile reinforcement is a reinforcing fiber bundle that matches the length of the mica tape and remains continuous, and the reinforcing fiber bundles are arranged in parallel and spaced apart along the length direction of the mica paper base tape; a mica slurry sheet layer is also formed on the surface of the reinforcing material layer, and reinforcing fiber cloth and a closed surface layer are sequentially formed on the surface of the mica slurry sheet layer.

2. The highly reinforced tensile mica tape according to claim 1, characterized in that: The mica paper base tape is muscovite paper, phlogopite paper or synthetic mica paper.

3. The highly reinforced tensile mica tape according to claim 1, characterized in that: The overall thickness of the tensile-resistant mica tape ranges from 0.15 mm to 0.30 mm; the sum of the thickness of the mica paper base tape and the mica slurry sheet layer accounts for 45% to 60% of the thickness of the tensile-resistant mica tape.

4. The highly reinforced tensile mica tape according to claim 1, characterized in that: The mesh fiber fabric is a mesh structure woven from high-strength glass fibers or ceramic fibers, and the mesh size is 0.5-1.0 mm.

5. The highly reinforced tensile mica tape according to claim 1, characterized in that: The bundle diameter of the reinforcing fiber bundle is 1.5 to 2 times the diameter of the warp and weft yarns of the woven mesh fiber fabric. The reinforcing fiber bundle is formed in the mesh fiber fabric in a threading manner and is formed as a whole with the mesh fiber fabric.

6. The highly reinforced tensile mica tape according to claim 1, characterized in that: The spacing between adjacent reinforcing fiber bundles in the width direction of the mica paper base tape is 3 to 5 mm.

7. The highly reinforced tensile mica tape according to claim 1, characterized in that: The reinforcing fiber bundle is one of glass fiber monofilaments, aramid fiber monofilaments, carbon fiber monofilaments, or a combination of the above.

8. The highly reinforced tensile mica tape according to claim 1, characterized in that: The reinforcing fiber cloth is alkali-free glass fiber cloth.

9. The highly reinforced tensile mica tape according to claim 1, characterized in that: The closed surface layer is one of mica paper, PE film, PET film, PVDF film, or a combination of mica paper and any one of PE film and PVDF film.

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