Composite heat-conducting silica gel gasket

Abstract

The composite heat-conducting silica gel gasket comprises a first transparent film, a silica gel sheet, a graphite layer and a second transparent film which are sequentially stacked, a first pinching sheet is arranged on the surface, away from the silica gel sheet, of the first transparent film, and a tearing sheet is arranged on the surface, away from the graphite layer, of the silica gel sheet. The tearing piece enables a gap to be reserved between the first transparent film and the silica gel piece, and a second pinching piece is arranged on the surface, away from the silica gel piece, of the tearing piece. The composite heat-conducting silica gel gasket has good aging resistance, flame retardance and heat conductivity, is integrally soft and can cover various uneven surfaces, and meanwhile heat can be rapidly conducted to the outside through the composite heat-conducting silica gel gasket. Moreover, through the arrangement of a tearing piece, a first pinching piece and a second pinching piece, an operator can tear down the first transparent film and the second transparent film more easily, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-conducting sheets, in particular to a composite heat-conducting silica gel gasket. Background Art

[0002] A heat-conducting gasket is a material used for heat dissipation, usually used in the heat dissipation design of electronic devices or electronic components. It has good heat-conducting performance and can effectively conduct the heat generated by the device to the heat sink or radiator, thereby reducing the working temperature of the device and improving the performance and operation stability of the device. However, there are also some problems in the use of existing heat-conducting gaskets. For example, the heat-conducting gasket obtained with silicon material as the main body usually has a low heat dissipation efficiency. At the same time, due to its plasticity, such a heat-conducting gasket can fit with single electronic components of different shapes. For the convenience of packaging, storage and transportation, such conductive gaskets usually need to use two transparent films to protect their surfaces. When in use, the transparent films can be torn off. However, it is found in the use process that due to the tight fit between the transparent film and the silica gel sheet, it is difficult for the operator or the film tearing mechanism in the automatic device to tear off the transparent film. Summary of the Invention

[0003] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a composite heat-conducting silica gel gasket.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A composite heat-conducting silica gel gasket includes a first transparent film, a silica gel sheet, a graphite layer and a second transparent film which are sequentially stacked. A first pinch piece is arranged on the surface of the first transparent film away from the silica gel sheet. A tear piece is arranged on the surface of the silica gel sheet away from the graphite layer. The tear piece leaves a gap between the first transparent film and the silica gel sheet. A second pinch piece is arranged on the surface of the tear piece away from the silica gel sheet.

[0005] Further, a frosted layer is arranged on the surface of the first pinch piece and / or the second pinch piece.

[0006] Further, a connecting piece is arranged on the first transparent film on the side opposite to the first pinch piece. One end of the connecting piece away from the first transparent film is connected to the second transparent film.

[0007] Further, a binding strip is annularly arranged on the surface of the silica gel sheet. A step part for embedding the graphite layer is formed between the binding strip and the silica gel sheet.

[0008] Further, a glue groove is formed on the surface of the silica gel sheet away from the graphite layer.

[0009] Further, a flame retardant layer is arranged on the surface of the silica gel sheet close to the graphite layer. The flame retardant layer is an epoxy resin film layer or a polyimide film layer.

[0010] Further, both the first transparent film and the second transparent film are easily degradable transparent films.

[0011] Further, a heat-conducting metal wire mesh layer is provided on the surface of the graphite layer away from the silica gel sheet, and the heat-conducting metal wire mesh layer is an aluminum wire mesh layer, a copper wire mesh layer, a tungsten wire mesh layer or an iron wire mesh layer.

[0012] Further, a heat-conducting adhesive layer is provided between the heat-conducting metal wire mesh layer and the second transparent film.

[0013] Further, the silica gel sheet includes a matrix made of silicone material, and the matrix is filled with heat-conducting metal powder.

[0014] Further, the heat-conducting metal powder is alumina powder.

[0015] The beneficial effects of the present utility model are as follows:

[0016] (1) The composite heat-conducting silica gel gasket of the present utility model has good aging resistance, flame retardancy and heat conductivity, and is relatively soft as a whole, capable of covering various uneven surfaces. At the same time, heat can be quickly conducted from the composite heat-conducting silica gel gasket to the outside, thereby significantly improving the heat dissipation efficiency, operation safety and service life of electronic components;

[0017] (2) Through the joint setting of the tearing piece, the first pinching piece and the second pinching piece of the composite heat-conducting silica gel gasket of the present utility model, it is easier for the operator to tear off the first transparent film and the second transparent film, and the operation is simple, thereby effectively improving the operation efficiency of the operator to stick the composite heat-conducting silica gel gasket on the electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an overall structural schematic diagram of the composite heat-conducting silica gel gasket of the present utility model;

[0019] Figure 2 is a partially disassembled structural schematic diagram of the present utility model;

[0020] Figure 3 is an exploded view of the composite heat-conducting silica gel gasket of the present utility model.

[0021] The reference numerals are: 1, silica gel sheet; 2, graphite layer; 3, first transparent film; 4, second transparent film; 5, tearing piece; 6, first pinching piece; 7, second pinching piece; 8, connecting piece; 9, edge wrapping strip; 10, frosting layer; 11, flame retardant layer; 12, glue groove; 13, heat-conducting metal wire mesh layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] For the convenience of those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the embodiments does not limit the present utility model.

[0023] Embodiment 1

[0024] As Figures 1-3 shown, this embodiment provides a composite heat-conducting silicone gasket, which includes a first transparent film 3, a silicone sheet 1, a graphite layer 2, and a second transparent film 4 stacked in sequence. A first pinch piece 6 is arranged on the surface of the first transparent film 3 away from the silicone sheet 1. A tear piece 5 is arranged on the surface of the silicone sheet 1 away from the graphite layer 2. The tear piece 5 leaves a gap between the first transparent film 3 and the silicone sheet 1. A second pinch piece 7 is arranged on the surface of the tear piece 5 away from the silicone sheet 1.

[0025] In this embodiment, the silicone sheet 1 is used as a base material. By arranging the graphite layer 2 on the silicone sheet 1, the rapid heat-conducting performance of the composite heat-conducting silicone gasket is significantly improved. The first transparent film 3 and the second transparent film 4 serve as protective films for the two surfaces of the silicone sheet 1. And the arrangement of the tear piece 5 leaves a small opening between the silicone sheet 1 and the first transparent film 3, making it more convenient to tear off the first transparent film 3, improving the efficiency of the operator to stick the silicone sheet 1 on the electronic component, and reducing the damage of the silicone sheet 1 to a certain extent.

[0026] When the silicone sheet 1 needs to be stuck on the electronic component, the operator needs to tear off the first transparent film 3 and the second transparent film 4 that are stuck on the silicone sheet 1 for protection. The operator holds the first pinch piece 6 by hand and tears off the first transparent film 3 from the composite heat-conducting silicone gasket. Then, hold the second pinch piece 7 and tear it off from the tear piece 5 of the composite heat-conducting silicone gasket. Then, the silicone sheet 1 can be stuck on the electronic component.

[0027] Furthermore, a matte layer 10 is arranged on the surface of the first pinch piece 6 and / or the second pinch piece 7. The matte layer 10 is composed of extremely fine raised particles. The arrangement of the matte layer 10 makes it not easy for the operator to slip when holding the first pinch piece 6 and the second pinch piece 7 by hand.

[0028] Furthermore, a connecting piece 8 is arranged on the first transparent film 3 on the side opposite to the first pinch piece 6. One end of the connecting piece 8 away from the first transparent film 3 is connected to the second transparent film 4. Specifically, the number of the connecting pieces 8 is two. The two connecting pieces 8 are arranged on the side of the first transparent film 3 away from the first pinch piece 6. The arrangement of the connecting piece 8 enables the second transparent film 4 to be directly torn off when the operator tears off the first transparent film 3, with simple operation and high efficiency.

[0029] Further, a binding strip 9 is provided around the surface of the silica gel sheet 1, and a step portion for embedding the graphite layer 2 is formed between the binding strip 9 and the silica gel sheet 1. Specifically, the binding strip 9 is provided around the outer periphery of the silica gel sheet 1, and the anti-peeling performance of the silica gel sheet 1 is effectively improved through the setting of the binding strip 9.

[0030] Further, glue grooves 12 are formed on the surface of the silica gel sheet 1 away from the graphite layer 2. Through the setting of the glue grooves 12, the periphery of the silica gel sheet 1 is more firmly and closely attached to the electronic components.

[0031] Further, a flame retardant layer 11 is provided on the surface of the silica gel sheet 1 close to the graphite layer 2, and the flame retardant layer 11 is an epoxy resin film layer or a polyimide film layer. Through the setting of the flame retardant layer 11, the high temperature stability of the composite heat-conducting silica gel gasket can be effectively improved, and further helps to improve the operation safety of the electronic components.

[0032] Further, both the first transparent film 3 and the second transparent film 4 are easily degradable transparent films. Specifically, the easily degradable transparent film is a polylactic acid transparent film. According to actual application requirements, the polylactic acid transparent film can also be replaced with a transparent film made of other easily degradable materials such as PBAT in the prior art. By using the easily degradable transparent film as the first transparent film 3 and the second transparent film 4 in this embodiment, the first transparent film 3 and the second transparent film 4 can be degraded in the natural environment without polluting the environment.

[0033] Further, a heat-conducting metal wire mesh layer 13 is provided on the surface of the graphite layer 2 away from the silica gel sheet 1, and the heat-conducting metal wire mesh layer 13 is an aluminum wire mesh layer, a copper wire mesh layer, a tungsten wire mesh layer or an iron wire mesh layer.

[0034] Further, a heat-conducting adhesive layer is provided between the heat-conducting metal wire mesh layer 13 and the second transparent film 4.

[0035] In this embodiment, the heat-conducting metal wire mesh layer 13 is a copper wire mesh. Through the setting of the heat-conducting metal wire mesh layer 13, the heat dissipation efficiency of the composite heat-conducting silica gel gasket is effectively improved, and when the composite heat-conducting silica gel gasket is attached to the electronic components, the settings of the heat-conducting metal wire mesh layer 13 and the heat-conducting adhesive layer can bond and shape the composite heat-conducting silica gel gasket, and while not affecting its heat conduction efficiency, improve the tear resistance and impact resistance of the composite heat-conducting silica gel gasket. The heat-conducting adhesive layer is coated with a commercially available high heat-conducting adhesive, and here it is preferably heat-conducting silica gel.

[0036] Further, the silica gel sheet 1 includes a matrix made of silicone material, and heat-conducting metal powder is filled in the matrix.

[0037] Further, the heat-conducting metal powder is alumina powder.

[0038] In this embodiment, by filling the silicone matrix with thermally conductive metal powder, while endowing the silicone sheet 1 with good insulation and aging resistance, the thermal conductivity of the silicone sheet 1 is further improved.

[0039] The above embodiments are preferred implementation solutions of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious substitutions made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A composite thermally conductive silicone gasket, characterized in that: The invention comprises a first transparent film, a silicone sheet, a graphite layer and a second transparent film stacked in sequence, wherein a first pinching piece is arranged on a surface of the first transparent film away from the silicone sheet, a tearing piece is arranged on a surface of the silicone sheet away from the graphite layer, the tearing piece leaves a gap between the first transparent film and the silicone sheet, and a second pinching piece is arranged on a surface of the tearing piece away from the silicone sheet.

2. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The surface of the first pinching sheet and / or the second pinching sheet is provided with a frosted layer.

3. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The first transparent film is provided with a connecting piece on a side opposite to the first pinching piece, and one end of the connecting piece away from the first transparent film is connected to the second transparent film.

4. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The surface of the silicone sheet is provided with an edge strip, and a step portion for embedding the graphite layer is formed between the edge strip and the silicone sheet.

5. The composite thermally conductive silicone gasket according to claim 1, characterized in that: A rubber groove is formed on the surface of the silicone sheet away from the graphite layer.

6. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The surface of the silicone sheet close to the graphite layer is provided with a flame retardant layer.

7. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The first transparent film and the second transparent film are both easily degradable transparent films.

8. The composite thermally conductive silicone gasket according to claim 1, characterized in that: A heat-conducting metal mesh layer is arranged on the surface of the graphite layer away from the silicone sheet.

9. The composite thermally conductive silicone gasket according to claim 8, characterized in that: A heat-conducting adhesive layer is arranged between the heat-conducting metal mesh layer and the second transparent film.

10. The composite thermally conductive silicone gasket according to claim 1, characterized in that: The silica gel sheet comprises a base body made of organic silicon material, and the base body is filled with heat-conducting metal powder.

Images