A high thermal and electrical conductivity elastomer

Abstract

The present invention discloses a high thermal conductivity and conductive elastomer, comprising a first thermal conductive and conductive foil and a second thermal conductive and conductive foil, wherein the first thermal conductive and conductive foil and the second thermal conductive and conductive foil are stacked up and down, and a gap is provided between the first thermal conductive and conductive foil and the second thermal conductive and conductive foil; and a thermal conductive and conductive elastomer and foam are provided in the gap. The present invention not only has better thermal performance, conductive performance, and mechanical performance, but also has low production cost, better economy, and more compact size.

Description

Technical Field

[0001] The invention relates to thermal and electrical conductivity technologies, and in particular to a high thermal and electrical conductivity elastomer. Background Art

[0002] In the prior art, the conductive and thermally conductive materials are made by mixing traditional thermally conductive particles with silicone and then vulcanizing and molding. The thermally conductive particles are carbon fibers or metal oxides (aluminum oxide / boron nitride). This technology is difficult to achieve a high longitudinal thermal conductivity (mostly 6W / mK). In the actual production process, in order to achieve a high longitudinal thermal conductivity (above 6W / mK), a lot of expensive thermally conductive particles are often filled, which has the following shortcomings:

[0003] 1. Too many thermal conductive particles lead to high hardness, which cannot be compressed well and has a large rebound force after compression;

[0004] 2. The thermally conductive particles cause the longitudinal resistance to be relatively high and cannot provide good grounding characteristics;

[0005] 3. The production cost is very high, because many high-performance thermal conductive particles need to be imported and are expensive;

[0006] 4. The thickness and working gap range of conductive and thermal conductive materials are generally above 0.50mm, and cannot be made into smaller sizes. The application is very limited, so it needs to be improved. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a high thermal and electrical conductivity elastomer, which not only has better thermal performance, electrical conductivity and mechanical properties, but also has low production cost, better economy and more compact size.

[0008] In order to solve the above technical problems, the present invention proposes a high thermal and electrical conductivity elastomer, comprising:

[0009] A first thermally conductive and electrically conductive foil and a second thermally conductive and electrically conductive foil, wherein the first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil are stacked up and down, and a gap is provided between the first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil;

[0010] A thermally conductive and electrically conductive elastomer, wherein the thermally conductive and electrically conductive elastomer is disposed in the gap;

[0011] The foam is arranged in the gap.

[0012] Furthermore, the first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil are copper foil or aluminum foil or a phase change heat storage material layer or a thermally conductive gel layer.

[0013] Furthermore, the thermally and electrically conductive elastomer is a carbon fiber film, an artificial graphite sheet, a graphite cloth, a graphite paper, a copper foil, a graphene, or an aluminum foil.

[0014] Furthermore, the foam is PU foam or silicone foam.

[0015] Furthermore, a backing adhesive is provided on the lower surface of the second thermally and electrically conductive foil.

[0016] The above technical scheme has at least the following beneficial effects: the present invention adopts a first heat-conductive and conductive foil and a second heat-conductive and conductive foil, and the first heat-conductive and conductive foil and the second heat-conductive and conductive foil are stacked up and down, and a gap is provided between the first heat-conductive and conductive foil and the second heat-conductive and conductive foil; and a heat-conductive and conductive elastomer and foam are arranged in the gap. When realizing the longitudinal heat conduction function, the heat is first transferred from the heating interface to the first heat-conductive and conductive foil, and then conducted to the heat-conductive and conductive elastomer and foam. Relying on the high heat conductivity of the first heat-conductive and conductive foil in the horizontal direction, the heat is quickly transferred to the second heat-conductive and conductive foil in the horizontal direction. After the second heat-conductive and conductive foil receives the heat, it quickly transfers the heat to the heat dissipation interface. When realizing the conductive function, the current is directly transferred from the first heat-conductive and conductive foil to the second heat-conductive and conductive foil, and the first heat-conductive and conductive foil and the second heat-conductive and conductive foil are transferred with the heat-conductive and conductive elastomer, and the resistance is low and stable. It not only has better thermal performance, conductive performance, and mechanical performance, but also has low production cost, better economy, and more compact size. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the high thermal and electrical conductive elastomer of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the high thermal and electrical conductive elastomer after compression of the present invention. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the structure of the high thermal and electrical conductive elastomer after compression of the present invention. Figure 2 . DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention is further described below in conjunction with the accompanying drawings.

[0021] like Figure 1As shown, the high thermal conductive conductive elastomer of the present invention comprises a first thermal conductive conductive foil 1 and a second thermal conductive conductive foil 2. The first thermal conductive conductive foil 1 and the second thermal conductive conductive foil 2 are copper foil or aluminum foil or a phase change heat storage material layer or a thermal conductive gel layer. The first thermal conductive conductive foil 1 and the second thermal conductive conductive foil 2 are stacked up and down, and a gap 3 is provided between the first thermal conductive conductive foil 1 and the second thermal conductive conductive foil 2; and a thermal conductive conductive elastomer 4 and a foam 5 are provided in the gap 3. Among them, the thermal conductive conductive elastomer 4 is a carbon fiber film or an artificial graphite sheet or a graphite cloth or a graphite paper or a copper foil or a graphene or an aluminum foil that is regularly folded and extruded in an array or a wave shape. The foam 5 is a PU foam or a silicone foam.

[0022] When realizing the longitudinal heat conduction function, such as Figure 2 As shown, heat is first transferred from the heating interface to the first thermally conductive and electrically conductive foil 1, and then conducted to the thermally conductive and electrically conductive elastomer 4 and the foam 5. Relying on the high thermal conductivity of the first thermally conductive and electrically conductive foil 1 in the horizontal direction, the heat is quickly transferred to the second thermally conductive and electrically conductive foil 2 in the horizontal direction. After receiving the heat, the second thermally conductive and electrically conductive foil 2 quickly transfers the heat to the heat dissipation interface.

[0023] When realizing the conductive function, Figure 2 As shown, the current is directly transmitted from the first heat-conductive and electrically conductive foil 1 to the second heat-conductive and electrically conductive foil 2, and the first heat-conductive and electrically conductive foil 1, the second heat-conductive and electrically conductive foil 2 and the heat-conductive and electrically conductive elastic body 4 are transmitted with low and stable resistance. It not only has better thermal performance, electrical conductivity, mechanical performance, and better shock-absorbing and rebound performance, but also has low production cost, better economy, and more compact size.

[0024] In another embodiment, if Figure 3 As shown, a backing adhesive 6 may be provided on the lower surface of the second thermally conductive and electrically conductive foil 2. The backing adhesive 6 is a double-sided adhesive or a thermally conductive double-sided adhesive. During installation, the backing adhesive 6 can better fix the highly thermally conductive and electrically conductive elastic material, and the structure is installed more firmly.

[0025] The above is a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. High thermal and electrical conductivity elastomer, characterized in that: include: A first thermally conductive and electrically conductive foil and a second thermally conductive and electrically conductive foil, wherein the first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil are stacked up and down, and a gap is provided between the first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil; A thermally conductive and electrically conductive elastomer, wherein the thermally conductive and electrically conductive elastomer is disposed in the gap; Foam, the foam is arranged in the gap; The first thermally conductive and electrically conductive foil and the second thermally conductive and electrically conductive foil are copper foil or aluminum foil or a phase change heat storage material layer or a thermally conductive gel layer; The thermally and electrically conductive elastomer is a carbon fiber film, an artificial graphite sheet, a graphite cloth, a graphite paper, a copper foil, a graphene, or an aluminum foil.

2. The high thermal and electrical conductivity elastomer according to claim 1, characterized in that: The foam is PU foam or silicone foam.

3. The high thermal and electrical conductivity elastomer according to claim 1, characterized in that: A backing adhesive is disposed on the lower surface of the second thermal and electrical conductive foil.

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