Unlock instant, AI-driven research and patent intelligence for your innovation.

Ribbed graphite film and preparation method thereof

A technology of graphite film and reinforcement, applied in the field of reinforcement graphite film and its preparation, can solve the problem that heat cannot be dissipated in time.

Pending Publication Date: 2022-02-08
江西鸿美新能源科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under high-frequency operating frequency, the heat generated by electronic components accumulates and increases rapidly, and the technical problem that the heat cannot be dissipated in time is becoming more and more obvious.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ribbed graphite film and preparation method thereof
  • Ribbed graphite film and preparation method thereof
  • Ribbed graphite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Please refer to figure 2 , the invention provides a kind of preparation method of reinforced graphite film, comprising steps:

[0028] (1) The first PI film is heated, carbonized and graphitized, and then calendered for the first time to obtain the first semi-finished product 20, and the first semi-finished product 20 is pressed and attached to the first carrying protective film 30, and the first semi-finished product 20 is pressed on the first carrying protective film 30, and then the first semi-finished product 20 is pressed and processed in the first calendering process. In the process, the preset thickness is obtained by controlling the pressure, which will not be elaborated here;

[0029] (2) Carry out heating carbonization and graphitization of the second PI film, and then perform the first calendering process to obtain the second semi-finished product 40, and press the second semi-finished product 40 on the second carrying protective film 70;

[0030] (3) Place...

Embodiment 1

[0033] (1) Send the first PI film with a thickness of 100 μm into a carbonization furnace, heat up to 1000-1200 °C for heating and carbonization, and obtain a carbonized film after cooling;

[0034] Put the carbonized film into the graphitization furnace, raise the temperature to 2500°C-3000°C for graphitization, and obtain the graphitized film after cooling;

[0035] Carrying out the first calendering process on the graphitized film to obtain the first semi-finished product, and attaching the first semi-finished product to the first carrying protective film, the thickness of the first semi-finished product is 70-80 μm;

[0036] (2) Obtain the second semi-finished product in the same way and press and attach it to the second carrying protective film, the thickness of the second semi-finished product is 70-80 μm;

[0037](3) Place a copper mesh between the first semi-finished product and the second semi-finished product (the thickness of the copper mesh is 50 μm), the surface o...

Embodiment 2

[0039] Embodiment 2 is the same as Embodiment 1, except that: Embodiment 2 uses stainless steel mesh as the reinforcement part, and the rest is the same as Embodiment 1, and will not be described in detail here.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a reinforced graphite film and a preparation method thereof. The reinforced graphite film comprises a first graphite film, a first bearing protection film, a second graphite film, a second bearing protection film and a reinforced part, wherein the first graphite film is provided with a first surface and a second surface. The first graphite film is provided with a first surface and a second surface, the first bearing protection film is attached to the surface of the first surface, the second graphite film is provided with a third surface and a fourth surface, the second bearing protection film is attached to the surface of the fourth surface, the reinforcement part is located between the first graphite film and the second graphite film, and the reinforcement part, the first graphite film and the second graphite film both comprise mutual embedding parts; the surfaces, making contact with the first graphite film and the second graphite film, of the reinforced parts are curved surfaces. According to the reinforced graphite film, heat can be rapidly conducted out in the thickness direction, so that the graphite film has good heat dissipation performance in the thickness direction, meanwhile, the heat conductivity in the horizontal direction cannot be reduced, and the reinforced graphite film has good mechanical performance and excellent bearing strength through reinforcement of the reinforced parts.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a reinforced graphite film and a preparation method thereof. Background technique [0002] At present, the general existing manufacturing method of graphite heat sink, it first sends PI (Polyimide) film (polyimide film) into a carbonization furnace, with the heating temperature of 1100°C-1300°C, the PI film is Heating and carbonization, the PI film is carbonized to form a PI carbonized sheet; then, the PI carbonized sheet is cooled, and after cooling to room temperature, the PI carbonized sheet is sent into a graphitization furnace, heated at 2800°C-3000°C temperature, the PI carbonized sheet is heated and graphitized, and the PI carbonized sheet is graphitized to form a PI graphite heat sink; after that, the PI graphite heat sink is cooled, and after cooling to room temperature, the thickness is rolled by a calendering device. After the PI graphite heat sink i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/76C04B35/52C04B35/622
CPCC04B35/76C04B35/522C04B35/62218C04B2235/9607
Inventor 李金明
Owner 江西鸿美新能源科技有限公司