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A kind of graphite high thermal conductivity film and preparation process thereof

A preparation process and high thermal conductivity technology, which is applied in the direction of carbon compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of inconvenient die-cutting, low production efficiency and high cost in the later stage, so as to improve production efficiency and application range, Solve the effect of low production efficiency

Active Publication Date: 2021-07-09
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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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 graphite high thermal conductivity film and a preparation process thereof, specifically comprising the following steps, wherein the prepared graphite high thermal conductivity film has a maximum width of 300 mm and a maximum width of 150 mm. The invention controls the unwinding tension, winding tension and rewinding speed of the rewinding equipment during the rewinding process, so as to control the slack of each small roll of polyimide film, and can prepare continuous rolled graphite with high thermal conductivity. The maximum width of the film can reach 300mm, and the longest can reach 150m, which solves the problems of low production efficiency, high labor cost, and inconvenient die-cutting processing in the later stage, and greatly improves the production efficiency and application range of the product.

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 Patents(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 刘志兵
Owner SHANGHAI SMITH ADHESIVE NEW MATERIAL