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High-thermal-conductivity graphite film and preparation process thereof

A preparation process, high thermal conductivity technology, applied in inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of inconvenient die-cutting in the later stage, low production efficiency, poor product applicability, etc., to improve production efficiency and application range. , Solve the effect of low production efficiency

Active Publication Date: 2019-01-15
SHANGHAI SMITH ADHESIVE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation process has the disadvantages of low production efficiency and high cost, and because there is a gap between the graphite film sheets after calendering, it is inconvenient to die-cut in the later stage and the product applicability is poor.

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the embodiments, but it should be noted that these embodiments are not limitations of the present invention, and those of ordinary skill in the art may make equivalent transformations or substitutions in terms of functions, methods, or structures based on these embodiments. All belong to the protection scope of the present invention.

[0028] This embodiment provides a preparation process of graphite high thermal conductivity film, which specifically includes the following steps,

[0029] a. Divide the roll-shaped whole raw material polyimide film into several small and wide roll-shaped products to be processed through a slitting machine;

[0030] b. Roll the small and wide rolled polyimide film to be processed onto a graphite tube core of the rewinding equipment to form a product to be processed. During the rewinding process, the tension of unwinding and winding should be well controlled. The ...

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Abstract

The invention provides a high-thermal-conductivity graphite film and a preparation process thereof, wherein the high-thermal-conductivity graphite film particularly comprises the following steps; thehigh-thermal-conductivity graphite film prepared by the method has the maximum width reaching 300 mm and the maximum length reaching 150 mm. By controlling the unwinding tension, winding tension and rewinding speed of rewinding equipment in the rewinding process, the relaxation degree of each small coil of polyimide thin film can be controlled, and continuous coiled high-thermal-conductivity graphite film can be prepared; the maximum width can reach 300 mm and the maximum length can reach 150 m; therefore, the problems of low production efficiency, high labor cost and inconvenient rear sectiondie cutting are solved. The production efficiency and the application scope of the product are greatly improved.

Description

technical field [0001] The invention relates to the technical field of polymer film preparation, in particular to a graphite high thermal conductivity film and a preparation process thereof. Background technique [0002] Graphite high thermal conductivity film is a brand-new heat conduction and heat dissipation material with unique grain orientation, which conducts heat evenly in two directions, and the lamellar structure can be well adapted to any surface, shielding heat sources and components while improving consumer electronics The performance of the product, while the product dissipates heat evenly, it also provides thermal isolation in terms of thickness. The superior thermal conductivity and ultra-thin thickness have attracted more and more attention from graphite heat-conducting films, and have been widely used in smart phones, ultra-thin PCs and LED TVs. [0003] Compared with traditional aluminum or copper heat sink materials, graphite high thermal conductivity fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 刘志兵
Owner SHANGHAI SMITH ADHESIVE NEW MATERIAL