Heating sheet of silica gel composite graphene heating material

Abstract

The utility model relates to the technical field of heating sheets, in particular to a heating sheet made of a silica gel composite graphene heating material, which comprises a graphene heating sheet and an outer coating layer, two groups of conductive electrodes are arranged on the graphene heating sheet, and bonding glue is coated on the upper surface and the lower surface of the graphene heating sheet. The upper side and the lower side of the graphene heating sheet are bonded with the outer coating layers through the bonding glue, and the design solves the problems that in the prior art, a heating sheet is short in service life and poor in waterproof sealing performance. An original layer pasting structure is changed into a wrapping structure, the size of the graphene heating piece is smaller than that of the silica gel piece, the periphery of the silica gel is larger than that of the graphene heating piece, the silica gel on the two sides is vulcanized to form a whole, better waterproof sealing performance can be achieved, and the heating piece can meet the working requirement in the low-temperature environment and can also meet the requirement for heat dissipation. And the characteristics of uniform heating, high heat conversion efficiency, high safety and the like can be realized.

Description

Technical Field

[0001] This utility model relates to the field of heating element technology, and more specifically, to a heating element made of silicone composite graphene heating material. Background Technology

[0002] Currently, most commercially available silicone heating elements primarily use silicone layers with nickel-chromium, copper-nickel, or other alloy wires, or composite etched stainless steel, copper, or aluminum sheets. These heating elements all suffer from metal fatigue and short lifespan. In recent years, the development of graphene technology has offered new possibilities for heating materials. However, while existing publicly available graphene heating film solutions incorporate silicone, they mostly employ a lamination method, resulting in limited waterproofing and sealing performance. Furthermore, existing silicone technologies typically use vulcanization and hot-press bonding, lacking optimized designs specifically for the characteristics of graphene heating elements. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a heating element made of silicone composite graphene heating material, thereby solving the problems of short lifespan and insufficient waterproof sealing performance of existing heating elements.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A heating element made of silicone composite graphene heating material includes a graphene heating element with electrodes for conducting electricity. The graphene heating element is wrapped with an outer coating layer, which integrally wraps the upper and lower surfaces and sides of the graphene heating element.

[0006] Furthermore, the outer coating is composed of thermally conductive silicone and fiberglass cloth. The thermally conductive silicone is applied to both sides of the fiberglass cloth by roller coating and pressure coating, with the fiberglass cloth sandwiched between the two layers of thermally conductive silicone. The silicone is then fused together by high-temperature vulcanization to form a new silicone insulating cloth material.

[0007] Furthermore, the thickness of the outer coating is between 0.1 and 3 mm.

[0008] Furthermore, the graphene heating element is a heating element prepared using graphene conductive ink.

[0009] Furthermore, the thickness of the graphene heating element is 5-350 μm.

[0010] Furthermore, the heating element ultimately forms a structure layer from top to bottom as follows: thermally conductive silicone - fiberglass cloth - thermally conductive silicone - adhesive - graphene heating element - electrode - adhesive - thermally conductive silicone - fiberglass cloth - thermally conductive silicone.

[0011] Furthermore, the graphene heating element is smaller than the outer coating.

[0012] Furthermore, the heating element operates at a voltage range of 5-400V, and its overall structural thickness is 0.3mm-6mm.

[0013] Furthermore, the electrodes are metal electrodes and there are two sets of them.

[0014] Furthermore, the outer coating and the graphene heating element are bonded together with adhesive.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The heating element prepared by this utility model using silicone + graphene heating element can meet various requirements in thickness between 0.3-6mm. It has good resistance to voltage impact and insulation performance, and heats up quickly, has a long lifespan, and can be made into any shape according to requirements. At the same time, because graphene itself has far-infrared normal emission and service life, it exceeds alloy heating elements and metal etched heating films.

[0017] 2. This utility model changes the original layered structure to an encapsulated structure. The graphene heating element is smaller than the silicone sheet, and the silicone sheet is larger than the graphene heating element on all sides. The silicone sheets on both sides are vulcanized to form a whole, so that the graphene heating element is completely encapsulated by the silicone sheet, which can achieve better waterproof sealing performance. This heating element can meet the working requirements in low-temperature environments, and can achieve uniform heating, high heat conversion efficiency, and high safety.

[0018] 3. This utility model adopts a method of silicone vulcanization fusion to wrap the heating element, which significantly improves the waterproof and sealing performance compared with the original layering method; an adhesive layer is added between the graphene heating element and the silicone to enhance the bonding performance between PET and silicone during silicone vulcanization, ensuring the stability and reliability of the heating element structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0021] Figure 3 This is a front sectional view of the present invention.

[0022] In the diagram: 1. Thermally conductive silicone; 2. Fiberglass cloth; 3. Graphene heating element; 4. Adhesive; 5. Electrode. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0024] Example:

[0025] like Figures 1 to 3 As shown, a heating element made of silicone composite graphene heating material includes a graphene heating element 3 and an outer coating layer. The graphene heating element 3 is provided with two sets of electrodes 5 for conducting electricity. Adhesive 4 is applied to both the upper and lower surfaces of the graphene heating element 3. The adhesive 4 is mainly used for bonding the graphene heating element 3 and silicone. It can be coated or sprayed on both sides of the graphene heating element 3 before silicone curing. During silicone curing, it enhances the bonding performance between PET and silicone. The outer coating layer is attached to both the upper and lower sides of the graphene heating element 3 by the adhesive 4. This design solves the problems of short lifespan and insufficient waterproof sealing performance of the heating element in the prior art.

[0026] In this embodiment, the outer covering layer consists of thermally conductive silicone 1 and fiberglass cloth 2. The thermally conductive silicone 1 is applied to both sides of the fiberglass cloth 2 by roller coating and pressure coating, with the fiberglass cloth 2 sandwiched between the two layers of thermally conductive silicone 1. These layers are then fused together using high-temperature vulcanization to form a new silicone insulating cloth material. This combined structure ensures good thermal conductivity while enhancing the material's mechanical strength and waterproof sealing.

[0027] In this embodiment, the thickness of the outer coating is between 0.1 and 3 mm.

[0028] In this embodiment, the graphene heating element 3 is a heating element prepared using graphene conductive ink. The graphene conductive ink is printed onto an insulating film with insulating properties, such as PET, through printing or coating methods to form a heating element with purely resistive characteristics. The graphene heating element 3 not only provides uniform heating but also has a fast response speed, effectively improving heating efficiency.

[0029] In this embodiment, the thickness of the graphene heating element 3 is 5-350 μm.

[0030] In this embodiment, the heating element ultimately forms a structure layer from top to bottom as follows: thermally conductive silicone 1 - fiberglass cloth 2 - thermally conductive silicone 1 - adhesive 4 - graphene heating element - electrode 5 - adhesive 4 - thermally conductive silicone 1 - fiberglass cloth 2 - thermally conductive silicone 1.

[0031] In this embodiment, the graphene heating element 3 is smaller than the outer coating. This design ensures that the edges of the graphene heating element 3 are completely covered, making the silicone larger than the graphene heating element around its perimeter. The silicone on both sides is vulcanized to form a whole, so that the graphene heating element 3 is completely covered by the silicone, which can achieve better waterproof sealing performance.

[0032] In this embodiment, the operating voltage range of the heating element is 5-400V, and the overall structural thickness is 0.3mm-6mm.

[0033] The working principle of this silicone-coated graphene heating material heating element is as follows: Graphene conductive ink is printed onto an insulating film to form a graphene heating element 3; thermally conductive silicone 1 is roller-coated and press-coated onto both sides of a fiberglass cloth 2, and then vulcanized at high temperature; adhesive 4 is coated onto both sides of the graphene heating element 3, and the graphene heating element 3 coated with adhesive 4 is placed between two sets of outer coatings to ensure that the graphene heating element 3 is completely covered by silicone; adhesive 4 is used to bond the graphene heating element 3 and the silicone, and strengthens the PET and silicone during silicone vulcanization. The adhesive properties of the glue solve the problem of silicone not sticking to PET, ensuring the stability of the heating element structure. The assembled heating element is vulcanized at high temperature, so that the silicone fuses and wraps the heating element to form an integral structure, which can achieve better waterproof sealing performance. The heating element finally forms a structure layer from top to bottom as follows: thermally conductive silicone 1 - fiberglass cloth 2 - thermally conductive silicone 1 - adhesive 4 - graphene heating element - electrode 5 - adhesive 4 - thermally conductive silicone 1 - fiberglass cloth 2 - thermally conductive silicone 1. The electrode 5 is connected to the appropriate position of the graphene heating element 3 to realize electrothermal conversion.

[0034] In summary, the heating element made of silicone and graphene can meet various requirements in terms of thickness, ranging from 0.3 to 6 mm. It exhibits excellent resistance to voltage surges and insulation properties, as well as rapid heating, long lifespan, and customizable shape. Furthermore, graphene's far-infrared normal emission and lifespan surpass those of alloy heating elements and metal etched heating films. By using graphene conductive ink to prepare the heating element and combining it with silicone vulcanization to encapsulate the heating element, the graphene heating element 3 is completely covered by silicone, achieving better waterproof sealing performance and significantly improving the overall performance and reliability of the heating element.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A heating element made of silicone composite graphene heating material, comprising a graphene heating element (3), characterized in that: The graphene heating element (3) is provided with electrodes (5) for conducting electricity. The graphene heating element (3) is wrapped with an outer coating layer, which integrally wraps the upper and lower surfaces and sides of the graphene heating element (3).

2. The heating element of the silicone composite graphene heating material according to claim 1, characterized in that: The outer coating is composed of thermally conductive silicone (1) and fiberglass cloth (2). The thermally conductive silicone (1) is applied to the front and back sides of the fiberglass cloth (2) by roller coating and pressure coating respectively. The fiberglass cloth (2) is sandwiched between the two layers of thermally conductive silicone (1) and is fused together by high-temperature vulcanization to form a new silicone insulating cloth material.

3. The heating element of the silicone composite graphene heating material according to claim 2, characterized in that: The thickness of the outer coating is between 0.1 and 3 mm.

4. The heating element of the silicone composite graphene heating material according to claim 2, characterized in that: The graphene heating element (3) is a heating element prepared using graphene conductive ink.

5. The heating element of the silicone composite graphene heating material according to claim 4, characterized in that: The thickness of the graphene heating element (3) is 5-350 μm.

6. The heating element of the silicone composite graphene heating material according to claim 4, characterized in that: The heating element is finally formed into a structure layer from top to bottom as follows: thermally conductive silicone (1) - fiberglass cloth (2) - thermally conductive silicone (1) - adhesive (4) - graphene heating element - electrode (5) - adhesive (4) - thermally conductive silicone (1) - fiberglass cloth (2) - thermally conductive silicone (1).

7. The heating element of the silicone composite graphene heating material according to claim 1, characterized in that: The size of the graphene heating element (3) is smaller than that of the outer coating.

8. The heating element of the silicone composite graphene heating material according to claim 1, characterized in that: The heating element operates at a voltage range of 5-400V and has an overall structural thickness of 0.3mm-6mm.

9. The heating element of the silicone composite graphene heating material according to claim 1, characterized in that: The electrode (5) is a metal electrode and is provided in two sets.

10. The heating element of the silicone composite graphene heating material according to claim 1, characterized in that: The outer coating and the graphene heating element (3) are bonded together with adhesive.

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