Method for manufacturing graphite foil capable of heat conduction and electricity conduction

Abstract

The invention provides a method for manufacturing a graphite foil capable of heat conduction and electricity conduction. The method comprises the following steps: 1) spraying graphite powder onto a glue film with a basement membrane through a powder blower; and 2) rolling and flattening the graphite powder and the glue film to obtain a graphite belt capable of heat conduction and electricity conduction. In the method for manufacturing a graphite foil capable of heat conduction and electricity conduction, the graphite powder is sprayed onto the glue film, and the rolling and flattening method is adopted to overcome the defect that a flexible graphite plate is easily fractured; heating, baking and other processes are not required in the manufacturing process, so the energy consumption is low, and the obtained finished product can be used in heat conduction of a curve surface, such as a pipeline surface, and the heat conductive coefficient reaches 400W/mK, and is higher than the heat conductive coefficient of an aluminum foil; and the graphite material is difficult to oxidize, so the finished product is more durable, and is suitable in the fields of surface heat conduction and heating films.

Description

technical field [0001] The invention relates to the field of preparation of a conductive and thermally conductive film material, in particular to a method for manufacturing a conductive and thermally conductive graphite foil for surface thermal and conductive conduction. Background technique [0002] Existing structural surfaces, such as the surface of pipes, often use aluminum foil for heat conduction, and its thermal conductivity is 186W / mK. The problem is that the processing energy consumption of aluminum foil is high, and it is exposed to air in actual use. High-quality aluminum foil is easy to oxidize, resulting in poor thermal conductivity and reduced service life. [0003] Chinese patent 200910027939.6 discloses "a graphite thermal interface material and its manufacturing process". At least one side of the flexible graphite sheet is attached with a film through an adhesive. The film is coated with a high-temperature resistant pressure-sensitive adhesive. The other sur...

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Problems solved by technology

[0002] Existing structural surfaces, such as the surface of pipes, often use aluminum foil for heat conduction, and its thermal conductivity is 186W / mK. The problem is that the processing energy consumption of aluminum foil is high, and it is exposed to air in actual use. The aluminum foil is easy to oxidize, resulting in poor thermal conductivity and reduced service life

Thus a graphite thermal interface material is obtained, but it should be noted that the flexible graphite sheet is easy to break and is not easy for industrial deep processing, and the finished product is easily broken when it is attached to the surface of the pipeline. Large enough that fractures would render the thermally conductive material in the finished product useless

[0004] The pressure-sensitive adhesive is coated on the flexible graphite sheet. During the processing, the pressure-sensitive adhesive has a pungent smell, which affects the production environment. Workers need to take special protective measures, and the thickness of the sprayed pressure-sensitive adhesive is not easy to control, resulting in Local heat conduction is uneven. For materials with poor heat conduction, such as silicon wafers, it is easy to cause poor local heat dissipation of the silicon wafer, and the electron migration phenomenon is easily aggravated in this part

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