Multi-layer composite insulating paperboard

Abstract

The utility model discloses a multi-layer composite insulating cardboard which comprises an insulating core board, a surface reinforcing sheet is fixedly covered on the surface of the insulating core board, a back reinforcing sheet is fixedly covered on the back of the insulating core board, and the surface of the surface reinforcing sheet and the surface of the back reinforcing sheet are respectively coated with a waterproof coating. And the surfaces of the two groups of waterproof coatings are covered with waterproof films. According to the multi-layer composite insulating paper board, the surface reinforcing sheet and the back reinforcing sheet are arranged on the front face and the back face of the insulating paper board respectively, the tearing resistance of the insulating paper board can be improved, and the insulating paper board is not prone to being damaged when stressed; the surfaces of the surface reinforcing sheet and the back reinforcing sheet are covered with the waterproof coatings, the surfaces of the waterproof coatings are covered with the waterproof films, and the waterproof coatings and the waterproof films are arranged, so that waterproof work can be conducted on the two faces of the insulating paperboard, and moisture absorption of the insulating paperboard is avoided.

Description

Technical Field

[0001] The utility model relates to the field of insulating paperboards, and specifically to a multi-layer composite insulating paperboard. Background Art

[0002] Insulating paperboard is a kind of paperboard material with excellent insulating properties.

[0003] Insulating paperboard is usually made of high-quality wood pulp or other fiber raw materials through special treatment and processing techniques. Its main characteristics are high electrical insulation strength, mechanical strength, and moisture resistance.

[0004] In the electrical field, insulating paperboard is widely used. For example, in transformers, it is often used as an insulating isolation layer between windings to prevent current leakage and short circuits, ensuring the normal operation and safety of transformers.

[0005] In motor manufacturing, insulating paperboard can also be used for the insulating parts of stators and rotors to help motors operate stably under high voltages and complex electromagnetic environments.

[0006] The quality and performance of insulating paperboard are crucial for the reliability and safety of electrical equipment. High-quality insulating paperboard needs to have characteristics such as uniform thickness, good flatness, low moisture absorption, and stable insulating performance.

[0007] When insulating paperboard works in a humid environment in the south, due to its moisture absorption, its insulating performance will decline. Content of the Utility Model

[0008] The purpose of the utility model is to provide a multi-layer composite insulating paperboard to solve the defects mentioned in the above background art.

[0009] To achieve the above purpose, a multi-layer composite insulating paperboard is provided, including an insulating core board. A surface strengthening sheet is fixedly covered on the surface of the insulating core board, and a back strengthening sheet is fixedly covered on the back of the insulating core board. At the same time, a waterproof coating is coated on the surfaces of both the surface strengthening sheet and the back strengthening sheet, and a waterproof film is covered on the surfaces of the two groups of waterproof coatings.

[0010] Preferably, the thickness of the insulating core board is 2 mm, and the combined thickness of the waterproof film, waterproof coating, and surface strengthening sheet on the surface of the insulating core board is 1.5 mm.

[0011] Preferably, the waterproof coating is a fluorocarbon-based hydrophobic coating material, and the thicknesses of both the waterproof coating and the waterproof film are 0.5 mm.

[0012] Preferably, the surface strengthening sheet and the back strengthening sheet have the same thickness, and strengthening grids are arranged inside both the surface strengthening sheet and the back strengthening sheet.

[0013] Preferably, the reinforcing grid is composed of multiple groups of warp wires and weft wires, and the multiple groups of warp wires and weft wires are arranged crosswise, and the included angle between the warp wires and the weft wires is 90°.

[0014] Preferably, both the warp wires and the weft wires are strip-shaped structures made of plastic materials, and the distance between adjacent two groups of warp wires and weft wires is the same.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The front and back of the insulating cardboard are respectively provided with a front reinforcing sheet and a back reinforcing sheet, which can increase the anti-tearing ability of the insulating cardboard and is not easily damaged when stressed;

[0017] The surfaces of the front reinforcing sheet and the back reinforcing sheet are both covered with a waterproof coating, and at the same time, a waterproof film is covered on the surface of the waterproof coating. The settings of the waterproof coating and the waterproof film can carry out waterproof work on both sides of the insulating cardboard to avoid moisture absorption of the insulating cardboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0019] Figure 2 is a bottom view of the structure of the present utility model;

[0020] Figure 3 is a top view of the structure of the present utility model;

[0021] Figure 4 is a rear view of the structure of the present utility model.

[0022] Reference numerals in the drawings: 1, insulating core board; 2, waterproof film; 3, waterproof coating; 4, front reinforcing sheet; 5, reinforcing grid; 51, warp wire; 52, weft wire; 6, back reinforcing sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Please refer to Figures 1-4 , the present utility model provides a multi-layer composite insulating cardboard, including an insulating core board 1, a front reinforcing sheet 4 is fixedly covered on the surface of the insulating core board 1, a back reinforcing sheet 6 is fixedly covered on the back of the insulating core board 1, a waterproof coating 3 is coated on the surfaces of both the front reinforcing sheet 4 and the back reinforcing sheet 6, and a waterproof film 2 is covered on the surfaces of the two groups of waterproof coatings 3.

[0024] Working principle: A front reinforcing sheet 4 and a back reinforcing sheet 6 are respectively arranged on the front and back of the insulating cardboard, which can increase the anti-tearing ability of the insulating cardboard and is not easily damaged when stressed; waterproof coatings 3 are covered on the surfaces of the front reinforcing sheet 4 and the back reinforcing sheet 6, and at the same time, a waterproof film 2 is covered on the surface of the waterproof coating 3. The settings of the waterproof coating 3 and the waterproof film 2 can perform waterproof work on both sides of the insulating cardboard to prevent the insulating cardboard from absorbing moisture.

[0025] The thickness of the insulating core board 1 is 2 mm, and the combined thickness of the waterproof film 2, the waterproof coating 3 and the front reinforcing sheet 4 on the surface of the insulating core board 1 is 1.5 mm.

[0026] As a preferred embodiment, the waterproof coating 3 is a fluorocarbon-based hydrophobic coating material, and the thicknesses of both the waterproof coating 3 and the waterproof film 2 are 0.5 mm.

[0027] The front reinforcing sheet 4 and the back reinforcing sheet 6 have the same thickness, and reinforcing grids 5 are arranged inside both the front reinforcing sheet 4 and the back reinforcing sheet 6.

[0028] The reinforcing grid 5 is composed of multiple groups of radial wires 51 and weft wires 52, and the multiple groups of radial wires 51 and weft wires 52 are cross-arranged, and the included angle between the radial wire 51 and the weft wire 52 is 90°.

[0029] As a preferred embodiment, both the radial wire 51 and the weft wire 52 are strip-shaped structures made of plastic materials, and the distance between adjacent two groups of radial wires 51 and weft wires 52 is the same.

Claims

1. A multi-layer composite insulating paperboard, comprising an insulating core board (1), characterized in that: The surface of the insulating core board (1) is fixedly covered with a surface reinforcement sheet (4), and the back of the insulating core board (1) is fixedly covered with a back reinforcement sheet (6). At the same time, the surfaces of the surface reinforcement sheet (4) and the back reinforcement sheet (6) are both coated with a layer of waterproof coating (3), and the surfaces of the two groups of waterproof coatings (3) are both covered with a waterproof film (2).

2. The multi-layer composite insulating paperboard according to claim 1, characterized in that: The thickness of the insulating core board (1) is 2 mm, and the combined thickness of the waterproof film (2), the waterproof coating (3) and the surface reinforcement sheet (4) on the surface of the insulating core board (1) is 1.5 mm.

3. The multi-layer composite insulating paperboard according to claim 2, characterized in that: The waterproof coating (3) is a fluorocarbon hydrophobic coating material, and the thickness of the waterproof coating (3) and the waterproof film (2) are both 0.5 mm.

4. The multi-layer composite insulating paperboard according to claim 1, characterized in that: The thickness of the front reinforcing sheet (4) and the back reinforcing sheet (6) are consistent, and reinforcing grids (5) are arranged inside the front reinforcing sheet (4) and the back reinforcing sheet (6).

5. The multi-layer composite insulating paperboard according to claim 4, characterized in that: The reinforcing grid (5) is composed of a plurality of groups of warp wires (51) and weft wires (52), and the plurality of groups of warp wires (51) and weft wires (52) are arranged crosswise, and the angle between the warp wires (51) and the weft wires (52) is 90°.

6. The multi-layer composite insulating paperboard according to claim 5, characterized in that: The warp wires (51) and the weft wires (52) are both strip-shaped structures made of plastic material, and the distances between two adjacent groups of warp wires (51) and weft wires (52) are consistent.

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