Insulating and heat-conducting graphite gasket

Abstract

The utility model discloses an insulating heat-conducting graphite gasket which comprises a gasket body, the top end face of the gasket body extends upwards to form an upper folding part, the bottom end face of the gasket body extends downwards to form a lower folding part, and the left side face and the right side face of the gasket body respectively extend outwards to form side folding parts. The upper folding part, the lower folding part and the lateral folding part are each provided with a plurality of through holes arranged at intervals, and the sum of the length of the lateral folding part, the width of the folding part and the width of the lower folding part is equal to the width of the gasket body. And in an assembling state, the upper folding part, the lower folding part and each side folding part are folded towards the inner side and are adhered to the gasket body. The upper folding part, the lower folding part and the side folding part are provided with the multiple through holes, the upper folding part, the lower folding part and the side folding part are folded towards the inner side and adhered to the gasket body, so that the multiple through holes are converted into blind holes, the machining precision of the gasket is reduced, debugging time is saved, and therefore the production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of gasket technology, and in particular to an insulating and thermally conductive graphite gasket. Background Technology

[0002] Existing electronic devices typically contain many heat-generating electronic components, such as battery packs, control chips, and displays. Taking mobile phones as an example, the heat generated by the internal chips needs to be conducted to the casing, which requires thermally conductive pads or other thermally conductive materials to be placed between the chip and the casing.

[0003] Graphite has excellent electrical and thermal conductivity. Graphite can be used to prepare graphene, which has a very high thermal conductivity, reaching 4000 W / mK to 5000 W / mK at room temperature, exceeding that of carbon nanotubes and diamond.

[0004] See patent document CN202411118660X, which discloses a thermally conductive pad. The thermally conductive filler of this pad is any one or more of alumina, zinc oxide, aluminum nitride, and boron nitride. Thermally conductive pads made of this material have poor thermal conductivity and cannot be used in applications with high thermal conductivity requirements, thus exhibiting a problem of poor thermal conductivity. Furthermore, existing thermally conductive pads are generally rectangular sheets, making it difficult for workers to determine the installation direction of the pad in situations requiring specific installation orientation, thereby reducing assembly efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an insulating and thermally conductive graphite gasket, which solves the problem of poor thermal conductivity of traditional gaskets.

[0006] To solve the above-mentioned technical problems, this utility model discloses an insulating and thermally conductive graphite pad, comprising a graphite sheet body, a first insulating film layer attached to the top surface of the graphite sheet body, a first release film attached to the top surface of the first insulating film layer, a second insulating film layer attached to the bottom surface of the graphite sheet body, an adhesive layer attached to the bottom surface of the second insulating film layer, and a second release film layer attached to the bottom surface of the adhesive layer; the vertical distance between the outer peripheral side of the adhesive layer and the outer peripheral side of the graphite sheet body is greater than 0.7 mm; an inclined angle is provided at the corner of the front end of the graphite sheet body, and the thickness of the graphite sheet body is 80-100 micrometers.

[0007] The adhesive layer is either pressure-sensitive double-sided adhesive or polyurethane double-sided adhesive.

[0008] The adhesive layer is a double-sided adhesive, model 3M8804N, with a thickness of 0.05–0.3 mm.

[0009] The graphite sheet body includes a first graphite sheet, a second graphite sheet, and a third graphite sheet stacked sequentially from top to bottom. The first graphite sheet, the second graphite sheet, and the third graphite sheet are fixed by hot pressing.

[0010] The thicknesses of the first, second, and third graphite sheets are all 25 micrometers.

[0011] The thickness of the first insulating film layer and the thickness of the second insulating film layer are both 10 micrometers.

[0012] The thickness of the first release film layer and the thickness of the second release film layer are both 0.05 mm.

[0013] The graphite sheet body has an indicator groove on its top surface.

[0014] The indicator slots are arranged in a triangular or arrow shape.

[0015] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0016] (1) Graphite sheet body is used as the main heat-conducting material, which has good thermal conductivity and solves the problem of poor thermal conductivity in the past.

[0017] (2) By forming an inclined angle at the front end of the graphite sheet, it is convenient for workers to intuitively distinguish the assembly direction of the graphite pad, which facilitates assembly and improves the production efficiency of assembly.

[0018] (3) The top surface area of ​​the adhesive layer is larger than the bottom surface area of ​​the graphite sheet body, which can prevent the graphite sheet body from directly contacting external electronic components and avoid problems of conductivity or leakage. The part of the adhesive layer that protrudes from the graphite sheet body can be folded and attached to the outer side of the graphite sheet body, further improving the insulation performance of the graphite pad. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the graphite sheet body in this utility model;

[0021] Figure 2 This is a cross-sectional view of the graphite gasket in this utility model;

[0022] Figure 3 This is a cross-sectional view of the graphite sheet body in this utility model. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or server that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or servers.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] This utility model discloses a specific embodiment of an insulating and thermally conductive graphite gasket, please see... Figure 1 and Figure 2 The system includes a graphite sheet body 1, with a first insulating film layer 21 bonded to the top surface of the graphite sheet body 1, a first release film bonded to the top surface of the first insulating film layer 21, a second insulating film layer 22 bonded to the bottom surface of the graphite sheet body 1, an adhesive layer 4 bonded to the bottom surface of the second insulating film layer 22, and a second release film layer 32 bonded to the bottom surface of the adhesive layer 4. It should be noted that both the first insulating film layer 21 and the second insulating film layer 22 are adhesive materials, and they are laminated onto the graphite sheet body 1 by calendering with the aid of a calender, so that the first insulating film layer 21 and the second insulating film layer 22 are bonded to the graphite sheet body 1. The first release film layer 31 and the second release film layer 32 are respectively bonded to the first insulating film layer 21 and the adhesive layer 4. In addition, the first insulating film layer 21 and the second insulating film layer 22 are both films made of conventional insulating and thermally conductive adhesives. For those skilled in the art, it is easy to obtain the structure and raw materials of the first release film layer 31 and the second release film layer 32.

[0027] As an improvement, the vertical distance between the outer peripheral surface of the adhesive layer 4 and the outer peripheral surface of the graphite sheet body 1 is greater than 0.7 mm. Figure 1 The length a) in the text can be understood as the outer ring extending outward from the outer periphery of the adhesive layer 4, with a width of 0.7 mm. The top surface area of ​​the adhesive layer 4 is larger than the bottom surface area of ​​the graphite sheet body 1, which can prevent the graphite sheet body 1 from directly contacting external electronic components and avoid problems of conductivity or leakage. The part of the adhesive layer 4 that protrudes from the graphite sheet body 1 can be folded and attached to the outer surface of the graphite sheet body 1, further improving the insulation performance of the graphite pad.

[0028] To facilitate differentiation of the installation direction of the graphite gasket, an inclined angle 14 is provided at the corner of the front end of the graphite sheet body 1, and the thickness of the graphite sheet body 1 is 80-100 micrometers. In addition, an indicator groove 15 is provided on the top surface of the graphite sheet body 1. The indicator groove 15 is triangular in shape. In other embodiments, the indicator groove 15 may also be arrow-shaped.

[0029] As a preferred embodiment, adhesive layer 4 is either pressure-sensitive double-sided adhesive or polyurethane double-sided adhesive. Optionally, adhesive layer 4 is double-sided adhesive, model 3M8804N, which can effectively conduct heat, has high thermal conductivity, is suitable for bonding between heat-generating chips and heat sinks, enhances heat dissipation, and also has high adhesive strength and strong adhesion, enabling it to firmly bond to various surfaces and ensure that it will not fall off in high-temperature environments. Preferably, the thickness of adhesive layer 4 is 0.05–0.3 mm.

[0030] Combination Figure 3 The graphite sheet body 1 includes a first graphite sheet 11, a second graphite sheet 12, and a third graphite sheet 13 stacked sequentially from top to bottom. The first graphite sheet 11, the second graphite sheet 12, and the third graphite sheet 13 are compositely fixed by hot pressing. The thickness of the first graphite sheet 11, the second graphite sheet 12, and the third graphite sheet 13 is 25 micrometers.

[0031] In this embodiment, the thickness of the first insulating film layer 21 and the thickness of the second insulating film layer 22 are both 10 micrometers. Furthermore, the thickness of the first release film layer 31 and the thickness of the second release film layer 32 are both 0.05 millimeters. Both the first release film layer 31 and the second release film layer 32 are commercially available conventional release films.

[0032] In this embodiment, the graphite gasket uses the graphite sheet body 1 as the main heat-conducting material, which has excellent thermal conductivity, solving the problem of poor thermal conductivity in previous models. By forming an inclined angle 14 at the front end of the graphite sheet, workers can easily and intuitively distinguish the assembly direction of the graphite gasket, facilitating assembly and improving assembly production efficiency.

[0033] Finally, it should be noted that the insulating and thermally conductive graphite pad disclosed in this utility model embodiment is only a preferred embodiment of this utility model and is only used to illustrate the technical solution of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. An insulating and thermally conductive graphite pad, characterized in that, The invention includes a graphite sheet body, a first insulating film layer is attached to the top surface of the graphite sheet body, a first release film is attached to the top surface of the first insulating film layer, a second insulating film layer is attached to the bottom surface of the graphite sheet body, an adhesive layer is attached to the bottom surface of the second insulating film layer, and a second release film layer is attached to the bottom surface of the adhesive layer. The vertical distance between the outer peripheral side of the adhesive layer and the outer peripheral side of the graphite sheet body is greater than 0.7 mm; The graphite sheet body has an inclined angle at the corner of its front end, and the thickness of the graphite sheet body is 80~100 micrometers.

2. The insulating and thermally conductive graphite pad according to claim 1, characterized in that, The adhesive layer is either pressure-sensitive double-sided adhesive or polyurethane double-sided adhesive.

3. The insulating and thermally conductive graphite pad according to claim 1, characterized in that, The adhesive layer is a double-sided adhesive tape, model 3M8804N, and the thickness of the adhesive layer is 0.05~0.3 mm.

4. The insulating and thermally conductive graphite pad according to claim 1, characterized in that, The graphite sheet body includes a first graphite sheet, a second graphite sheet, and a third graphite sheet stacked sequentially from top to bottom, and the first graphite sheet, the second graphite sheet, and the third graphite sheet are fixed by hot pressing.

5. An insulating and thermally conductive graphite pad according to claim 4, characterized in that, The thickness of the first graphite sheet, the second graphite sheet, and the third graphite sheet are all 25 micrometers.

6. The insulating and thermally conductive graphite pad according to claim 1, characterized in that, The thickness of the first insulating film layer and the thickness of the second insulating film layer are both 10 micrometers.

7. An insulating and thermally conductive graphite pad according to claim 1, characterized in that, The thickness of the first release film and the thickness of the second release film layer are both 0.05 mm.

8. An insulating and thermally conductive graphite pad according to claim 1, characterized in that, An indicator groove is provided on the top surface of the graphite sheet body.

9. An insulating and thermally conductive graphite pad according to claim 8, characterized in that, The indicator slot is arranged in a triangular or arrow shape.

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