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Heat conduction graphite composite film and preparation method thereof

A heat-conducting graphite film and heat-conducting graphite technology are applied in the direction of adhesive types, adhesive additives, ester copolymer adhesives, etc., which can solve the problems of high cost, warping or burrs of the composite film, and complicated preparation process of the composite film.

Inactive Publication Date: 2017-08-04
世星科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the composite film formed by the heat-conducting graphite film and the base film in the prior art, the phenomenon of warping or burrs on the edge of the composite film after film cutting, and the complex preparation process and high cost of the composite film The problem

Method used

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  • Heat conduction graphite composite film and preparation method thereof
  • Heat conduction graphite composite film and preparation method thereof
  • Heat conduction graphite composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a thermally conductive graphite composite film, such as figure 2 As shown, it includes a substrate 1 , a coating 2 and a thermally conductive graphite film 3 . Wherein, the coating 2 is arranged on one side surface of the base material 1, and its viscosity is less than that of the adhesive and its peeling force per unit area is greater than that of the release agent; the heat-conducting graphite film 3 is pressed onto the coating Layer 2 is on the surface of the side facing away from the substrate 1 .

[0049] The above-mentioned coating 2 is a film formed by a mixture of a release agent, an adhesive, and an auxiliary agent. The thickness of the film is optimally controlled at 3um, or 1um, 2um, 4um, 5um, 8um, 9um, 12um, 15um, It is best to control it within the range of 1um-15um. Of course, other sizes can be used according to the actual needs of customers, but it should not be too thick to prevent the coating 2 from being too sticky to the he...

Embodiment 2

[0061] This embodiment provides a method for preparing the thermally conductive graphite composite film provided in Embodiment 1, comprising the following steps:

[0062] S2: Mix 40 parts of silicone oil, 30 parts of silica gel, and 5 parts of additives into the solvent to form a mixed solution; the additives are mainly defoamers and antistatic agents. The mass ratio is 6:1; use an inkjet printer to spray the mixed solution with a thickness of 3um on the top surface of the PET substrate 1, and form a base film with the PET substrate 1 after the mixed solution is cured;

[0063] S3: Using a double-roll calender, press the heat-conducting graphite film 3 onto the top surface of the coating layer 2 in the base film to form a composite film.

[0064] In the preparation method of the composite film in this embodiment, since the coating 2 has a certain viscosity and peeling force, it is only necessary to coat the coating 2 with the required thickness on the substrate 1, and then pre...

Embodiment 3

[0073] This embodiment provides a method for preparing a heat-conducting graphite composite film. Compared with the preparation method in Example 2, the only difference is that the coating 2 is formed in a different way, and the release agent and adhesive used are different. Agent, auxiliary agent and base material 1 are all the same as in Example 1, specifically, this preparation method comprises the steps:

[0074] S1: According to the preset pattern, divide a plurality of first regions 21 and / or a plurality of second regions 22 of the desired pattern on the top surface of the substrate 1, such as image 3 As shown, the first area 21 is in the shape of a grid, and the second area 22 is also in the shape of a grid. The first area 21 and the second area 22 are arranged to cross each other, and the entire pattern is a black and white grid;

[0075] S2: add auxiliary agents to the release agent and the adhesive in advance, and use an inkjet printer to apply the release agent and a...

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Abstract

The invention discloses a heat conduction graphite composite film and a preparation method thereof. The heat conduction graphite composite film comprises a substrate, a coating layer and a heat conduction graphite film, wherein the coating layer is arranged at the surface of one side of the substrate; the viscosity of the coating layer is smaller than the viscosity of an adhesive, and the release force of the coating layer in unit area is greater than the release force of a release agent in the unit area; the heat conduction graphite film is pressed at the surface of one side, back to the substrate, of the coating layer. The preparation method comprises the following steps of coating the coating layer with required thickness onto the surface of one side of the substrate; calendering the heat conduction graphite film onto the surface of one side, back to the substrate, of the coating layer. The heat conduction graphite composite film has the advantage that the coating layer has the releasing and adhering functions, one coating layer can replace the release agent layer in the existing release film and the adhesive layer in the existing protective film, a layer of substrate can replace the substrates in the existing release film and the existing protective film, the composite film can be formed by one step of film coating technology, and the next step of film cutting technology can be directly entered, so that the preparation process of the composite film is shortened, one layer of auxiliary material is not needed, and the preparation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting materials, and in particular relates to a heat-conducting graphite composite film and a preparation method thereof. Background technique [0002] High thermal conductivity graphite film, also known as synthetic graphite film, is widely used in electronic products for heat dissipation due to its excellent thermal conductivity, corrosion resistance and electrical conductivity. However, in order to further improve the density, thermal conductivity and ductility of the thermally conductive graphite film, the thermally conductive graphite film needs to be calendered under high pressure. During the calendering process, a bottom film is required as a carrier; When electronic products dissipate heat, it is necessary to carry out film cutting process according to the specific size and requirements of electronic products. [0003] The calendering and film cutting process of thermally conductive gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J133/04C09J11/08C09J11/06C09D183/04C09D5/20C09D7/12B32B27/36B32B9/00B32B9/04B32B7/10B32B7/06B32B33/00
CPCB32B7/06B32B7/10B32B9/007B32B9/045B32B27/36B32B33/00B32B2255/10C08K2201/017C08L2203/16C08L2205/03C08L2205/035C09D5/20C09D7/48C09D7/63C09D7/65C09D183/04C09J11/06C09J11/08C09J133/04C09J183/04C08L83/04C08L71/00C08K5/1345C08K5/5415
Inventor 王方志王亚东
Owner 世星科技股份有限公司
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