Graphite cooling fin and manufacturing process and application thereof

Abstract

The invention discloses a graphite radiating fin as well as a manufacturing process and application thereof, and the graphite radiating fin comprises the following components in percentage by weight: 10-30% of carboxyl-containing polyester resin, 0.1-5% of curing accelerator and 20-30% of layered clay mineral and epoxy resin. The epoxy resin is composed of 30%-40% of o-cresol novolac epoxy resin and 60%-70% of bisphenol A epoxy resin. And the curing accelerator is 2-methylimidazole. The graphite radiating fin manufacturing process comprises the following steps: (1) forming a uniform coating through electrostatic spraying; (2) adding an upper / lower protection plate; (3) the buffers are attached to the four side faces of the graphite sheet; (4) carrying out laminating treatment by using a laminating roller; and (3) carrying out heat treatment at 50-250 DEG C to finish the coating with the thickness of 10-100 microns. The process is simplified, and large-scale production can be realized. And dust generated in the manufacturing process is reduced.

Description

Technical Field

[0001] The present invention relates to the field of graphite heat sinks, and specifically to a graphite heat sink, its manufacturing process, and its application. Background Art

[0002] With the development of display technology, high-resolution products such as 8K UHD, OLED, and QD-OLED displays are under development. Therefore, heat dissipation technology that can solve the problems of miniaturization and high heat generation is crucial.

[0003] The existing technology has problems such as uneven drying of liquid coatings and complex manufacturing processes. Therefore, those skilled in the art have proposed a graphite heat sink, its manufacturing process, and its application to solve the problems raised in the above background. Summary of the Invention

[0004] The purpose of the present invention is to provide a graphite heat sink, its manufacturing process, and its application to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A graphite heat sink, by weight, contains 10%-30% of a carboxyl-containing polyester resin, 0.1%-5% of a curing accelerator, 20%-30% of a layered clay mineral, and an epoxy resin.

[0007] As a further solution of the present invention: The epoxy resin is composed of 30%-40% of o-cresol novolac epoxy resin and 60%-70% of bisphenol A epoxy resin.

[0008] As a still further solution of the present invention: The curing accelerator is 2-methylimidazole.

[0009] A manufacturing process of a graphite heat sink includes the following steps:

[0010] (a) Form a uniform coating by electrostatic spraying;

[0011] (b) Add upper / lower protective plates;

[0012] (c) Attach buffers to four sides of the graphite sheet;

[0013] (d) Perform lamination treatment using a laminating roller;

[0014] (e) Perform heat treatment at 50°C - 250°C to complete a coating with a thickness of 10 - 100 μm.

[0015] An application of a graphite heat sink.

[0016] Compared with the existing technology, the beneficial effects of the present invention are:

[0017] ① The graphite heat sink claimed and protected by the present invention can effectively solve the problem of excessive temperature existing in multiple industries and can be applied to electronic devices, electric vehicles, batteries, smart phones, carbon blocks and semiconductor devices, medical devices, and various displays and lighting devices.

[0018] ② The product preparation process is simple, large-scale production can be achieved, and dust generation during the manufacturing process can be effectively reduced.

[0019] ③ Flexural strength: 1.1 - 1.3 inches; Pencil hardness: above 2H; Impact resistance: 6 - 7 kg / cm; Thermal diffusivity (ΔT): Thermal efficiency is increased to 20.62 - 20.85; Environmental stability: Dust exposure is prevented through buffer materials and coatings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the manufacturing process flow chart of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0021] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] A graphite heat sink, by weight, comprises 10%-30% of a carboxyl-containing polyester resin, 0.1%-5% of a curing accelerator, 20%-30% of a layered clay mineral, and an epoxy resin.

[0026] The epoxy resin is composed of 30%-40% of o-cresol novolac epoxy resin and 60%-70% of bisphenol A epoxy resin.

[0027] The curing accelerator is 2-methylimidazole.

[0028] A manufacturing process of a graphite heat sink, please refer to Figure 1 , including the following steps:

[0029] (a) Form a uniform coating by electrostatic spraying;

[0030] (b) Add upper / lower protection plates;

[0031] (c) Attach buffers to four sides of the graphite sheet; enhance structural stability and block dust. Materials for the buffers can be selected from materials such as polycarbonate or silicone resin, etc. Achieve borderless display and improve the manufacturing environment.

[0032] (d) Perform lamination treatment using a laminating roller;

[0033] (e) Perform heat treatment at 50°C - 250°C to complete a coating with a thickness of 10 - 100 μm.

[0034] The coating can cover the front surface, rear surface, and edges simultaneously, and materials such as natural and artificial graphite, expanded graphite, graphene, Kish graphite, etc. can be applied.

[0035] An application of a graphite heat sink.

[0036] The following table is a performance evaluation result table

[0037] Evaluation Items Example 1 Example 2 Comparative Example Flexural Strength (inches) 1.1 1.0 1.3 Pencil Hardness 2H 2H F Impact Resistance (kg / cm) 6 7 5 Thermal Diffusivity (ΔT) 2 0.62 2 0.85 2 6.12

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A graphite heat sink, characterized in that: The invention comprises, by weight, 10%-30% of a polyester resin containing a carboxyl group, 0.1%-5% of a curing accelerator, 20%-30% of a layered clay mineral and an epoxy resin.

2. The graphite heat sink according to claim 1, characterized in that: The epoxy resin consists of 30%-40% of o-cresol novolac epoxy resin and 60%-70% of bisphenol A epoxy resin.

3. The graphite heat sink according to claim 1 or 2, characterized in that: The curing accelerator is 2-methylimidazole.

4. A manufacturing process for preparing the graphite heat sink according to any one of claims 1 to 3, characterized in that: The following steps are involved: (a) Forming a uniform coating by electrostatic spraying; (b) Add upper / lower protection plates; (c) Attach the buffers to the four sides of the graphene sheet. (d) laminating using a laminating roller; (e) Heat treatment at 50°C-250°C to complete a coating with a thickness of 10-100 μm.

5. An application of the graphite heat sink according to any one of claims 1 to 3.

Images