Production method for graphite film

A production method and technology of graphite film, applied in chemical instruments and methods, layered products, lamination auxiliary operations, etc., can solve problems such as fracture and cutting trouble, and achieve smooth and neat fractures, flexible product size, and control of product size. Effect

Active Publication Date: 2014-09-03
李鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the length of the entire graphite film coil is too long and the technical requirements for the winding process are too high in this method, the length direction of the graphite film produced in practical applications is easy to cause irregular fractures, which brings unnecessary troubles for subsequent applications. Cropping trouble

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In this embodiment, the polymer film is PI film, and the high temperature resistant elastic material is carbon felt.

[0013] A production method of a graphite film, comprising the following steps: a production method of a graphite film, comprising the following steps: 1), winding process: a. the polymer film is half-broken by using a dotted line knife at intervals of 0.2 meters Cutting to form a cutting dotted line; b. winding a high temperature resistant elastic material on the graphite core; c. laminating the polymer film with the cutting dotted line and flexible graphite paper, and then winding on the graphite core on the basis of step b; d. When the polymer film and flexible graphite paper wound in step c reach a predetermined thickness, fasten them with carbon ropes; 2), low-temperature carbonization; 3), high-temperature graphitization; 4), unwinding and collecting materials, artificial graphite film The semi-finished product and the flexible graphite paper are r...

Embodiment 2

[0016] Other steps are the same as in Example 1, in step a. the polymer film is half-cut with a dotted line knife every 2 meters to form a cut dotted line; in said step d, when the PI film and flexible graphite paper wound in step c After reaching the predetermined thickness, wrap it with a graphite plate and fasten it with a carbon rope. Since the graphite sheet is wrapped and then fastened with a carbon rope, the fastening force of the carbon rope can be more evenly applied to the inner coil.

Embodiment 3

[0018] Other steps are the same as in Example 1, in step a. the polymer film is carried out half-break die-cutting with a dotted line knife every 5 meters to form a cut dotted line; in said step d, when the PI film and flexible graphite paper wound in step c After the predetermined thickness is reached, the carbon felt of the predetermined thickness is wound, then wrapped with a graphite plate, and then fastened with a carbon rope. Since the carbon felt is wrapped inside and outside, and is finally wrapped with a graphite plate and then fastened with a carbon rope, the fastening force of the carbon rope can act more evenly on the inner coil.

[0019] The low-temperature carbonization in the present invention is a step of preheating the polymer film to a temperature of at least about 800° C., and is a step of thermally decomposing the polymer film to obtain a carbonized film. High-temperature graphitization is a process in which the carbonized film or polymer film produced in t...

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PUM

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Abstract

The invention discloses a production method for a graphite film. The production method comprises the following steps of (1) winding; (2) low-temperature carbonization; (3) high-temperature graphitization; (4) unwinding and taking-up, namely respectively rolling a semi-finished product of an artificial graphite film and flexible graphite paper; (5) rolling, namely pressing the artificial graphite film semi-finished product on a release film or a protection film; and (6) winding and packaging. The winding working procedure comprises the following steps of a, performing half-breakage type die cutting on a macromolecular film at intervals being 0.2-5m by a dotted line cutter to form cut dotted lines; b, coiling a graphite barrel core with a high-temperature resistant elastic material; c, attaching the macromolecular film with the cut dotted lines to the flexible graphite paper to obtain integrated macromolecular film and flexible graphite paper, and coiling the integrated macromolecular film and flexible graphite paper on the graphite barrel core on the basis of the step b; d, after the integrated macromolecular film and flexible graphite paper which is coiled in the step c reaches a specific thickness, fastening the integrated macromolecular film and flexible graphite paper through a carbon rope.

Description

Technical field: [0001] The invention relates to a production method of a graphite film used as a heat dissipation film and a heat sink material of electronic equipment, precision equipment, etc., and particularly relates to a production method of a smooth elongated graphite film. Background technique: [0002] With the continuous development of the electronics industry, mobile phones, computers, LCD TVs, and heat-generating components in various integrated circuit boards have higher and higher requirements for heat dissipation. Therefore, graphite film is a thin-film thermal conductivity material with high thermal conductivity. Widely used in the electronics industry, it can effectively transfer the heat generated by electronic components to radiators and other heat sinks, so that the heat of electronic components can be quickly diffused to reduce the temperature of electronic components that generate heat. : The production method of existing graphite film is to sandwich th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B38/04
Inventor 李平
Owner 李鹏
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