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Thermally-conductive graphite interface material and production process thereof

An interface material, graphite heat conduction technology, used in cooling/ventilation/heating transformation, synthetic resin layered products, lamination devices, etc. The effect of surface scratches, ease of use, and good thermal conductivity

Inactive Publication Date: 2010-05-26
DALIAN LICHANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of existing graphite materials as heat exchange materials that are vulnerable to damage, easily cause safety hazards, and poor contact between heat sources and heat sinks, and provide a graphite surface-attached film process to protect graphite heat. The exchange material, through this process, can effectively prevent the surface of the graphite heat exchange material from being scratched, the surface has an insulating effect, and has a good thermal conductivity of the thermal interface material

Method used

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  • Thermally-conductive graphite interface material and production process thereof
  • Thermally-conductive graphite interface material and production process thereof
  • Thermally-conductive graphite interface material and production process thereof

Examples

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Embodiment 1

[0030] Such as figure 1 As shown, the graphite composite material of the present invention includes: flexible graphite sheet 1, polyurethane adhesive 2, PET film 3, high temperature pressure sensitive adhesive 4 and separation material 5.

[0031] In this embodiment, a flexible graphite sheet 1 with a thickness of 1mm is selected, and the flexible graphite sheet 1 is evenly coated with a layer of polyurethane adhesive 2 on the surface in contact with the graphite sheet through the rubber roller on the grid, and the adhesive is controlled. The thickness of the liquid is between 2 μm and 3 μm; then heat the graphite sheet 1 coated with the adhesive under infrared rays for two minutes, take it out and dry it, and cover the surface with a layer of PET film 3 with a thickness of 0.012 mm; pass it through a hot pressing roller Hot pressing at 60°C, where the control pressure is 0.5MPa, to complete the single-sided lamination of the flexible graphite sheet. According to repeating th...

Embodiment 2

[0034] Such as figure 1 As shown, the graphite composite material of the present invention includes: a flexible graphite sheet 1 , a polyurethane adhesive 2 , a polyimide film 3 , a high-temperature pressure-sensitive adhesive 4 and a separation material 5 .

[0035]In this embodiment, a flexible graphite sheet 1 with a thickness of 0.15 mm is selected, and the surface of the flexible graphite sheet 1 that is in contact with the graphite sheet is evenly coated with a layer of polyurethane adhesive 2 by scraper coating, and the glue is controlled. The thickness is between 2 μm and 3 μm; after the graphite sheet 1 coated with the adhesive is heated and dried by constant temperature hot air, the surface is covered with a layer of polyimide film 3 with a thickness of 0.006 mm; Hot pressing, wherein the control pressure is 0.8MPa, to complete the single-sided lamination of the flexible graphite sheet. Repeat the above steps to adhere a layer of polyimide film 3 on the other side o...

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Abstract

The invention relates to a thermally-conductive graphite interface material and a production process thereof. The thermally-conductive graphite interface material is characterized by attaching films to at least one surface of a flexible graphite sheet by adhesives, coating high temperature resistant pressure-sensitive adhesives on the films and attaching separation materials to the other surfacesof the pressure-sensitive adhesives respectively. The production process comprises the procedures of coating, heating and drying, film covering, hot pressing, pressure-sensitive adhesive coating, release material sticking and rolling, etc. The film materials attached to the thermally-conductive graphite interface material on the one hand have the effect of surface insulation and on the other handcan effectively prevent the surface of the heat-exchange graphite material from being scratched, thereby obtaining the thermally-conductive interface material which is stable in use and has good thermal conductivity. The material of the invention is convenient to use. When the material is used, the release paper on the two surfaces is only stripped and is stuck to the heat source surface and the heat-dissipating assembly respectively, thus the heat source (electronic device) surface and the heat-dissipating material or assembly can be tightly coupled.

Description

technical field [0001] The present invention relates to a graphite heat-conducting interface material and its manufacturing process, in particular to a product for preventing the detachment of small particles on the surface of graphite materials or graphite composite materials, providing an adhesive film on an insulating surface, and conveniently adhering to heat dissipation devices and manufacturing process. Background technique [0002] At present, with the rapid development of the electronics industry and the need for miniaturization, the industry needs better thermal management systems. As an important part of innovation in the electronics industry, heat exchange technology is widely used in notebook computers, high-performance CPUs, mobile electronic devices (mobile phones, communications), etc. At present, heat dissipation materials are divided into isotropic heat dissipation materials and anisotropic heat dissipation materials. Stainless steel, aluminum, and copper a...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B7/12B32B27/06B32B37/12B32B38/16B32B37/06B32B37/10H05K7/20
Inventor 耿世达
Owner DALIAN LICHANG NEW MATERIAL CO LTD
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