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A kind of high-temperature electrothermal film and its preparation method
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An electrothermal film and high-temperature technology, applied in the field of high-temperature electrothermal film and its preparation, can solve the problems of complex process steps, damage, uneven heating, etc., achieve high electrothermal radiation conversion efficiency, high temperature uniformity, and simplify the process flow
Active Publication Date: 2019-10-08
WUXI GRAPHENE FILM +1
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Problems solved by technology
[0010] The process steps are relatively complicated, and the use of metal foil etching solution and stripping solution will pollute the environment
[0011] Chinese patent (CN 104883760 A) discloses an electric heater with a graphene film as the heating body. The graphene film is prone to uneven heating as a heating body. This is because the thickness of the graphene film is too thin (≈0.34nm). The preparation and processing process is easy to cause damage, and the uneven square resistance of graphene can also easily cause uneven heating; in addition, because graphene is too thin, it is easy to burn when working with high current, so it is difficult to achieve high temperature heating
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Embodiment 1
[0059] 1. Die-cut a graphite film with a thickness of 25 μm and a size of 14 cm×8.5 cm figure 1 In the pattern shown, the graphite film is made of graphene powder, the width of the graphite heating element is 0.55cm, the total length is 149.2cm, and the square resistance is 0.1Ω / □;
[0060] 2. Lay the die-cut graphite film on the PI film with a thickness of 125 μm and a size of 14 cm×8.5 cm. There is 50 μm thick silica gel on the PI film;
[0061]3. Use laser cutting equipment to cut 2 holes with a diameter of 0.55cm on the PI film with a thickness of 125μm, and the size of the PI film is 14cm×8.5cm;
[0062] 4. Align the PI film with the hole cut and the PI film covered with the graphite film heating element and then stick them together, so that the graphite heating element is partially exposed for subsequent crimping of the terminal;
[0063] After the terminal is pressed, the resistance of the graphite film electric heating film is measured to be 27Ω. At a room temperature...
Embodiment 2
[0065] 1. Die-cut a graphite film with silica gel with a thickness of 25 μm and a size of 14 cm×10.8 cm figure 2 In the pattern shown, the graphite film is sintered by PI film, the width of the graphite heating element is 0.55cm, the total length is 165.7cm, and the square resistance is 0.1Ω / □;
[0066] 2. Lay the die-cut graphite film on the PI film with a thickness of 125μm and a size of 14cm×10.8cm;
[0067] 3. Use laser cutting equipment to cut 2 holes with a diameter of 0.55 cm on the PI film with a thickness of 125 μm. There is silica gel with a thickness of 100 μm on the PI film, and the size of the PI film is 14 cm×10.8 cm;
[0068] 4. Align the PI film with the hole cut and the PI film covered with the graphite film heating element and then stick them together, so that the graphite heating element is partially exposed for subsequent crimping of the terminal;
[0069] 5. Cut the bonded electric heating film with a laser cutting machine figure 2 the shape shown.
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Abstract
The invention discloses a high-temperature electrothermal film and a preparation method therefor. The high-temperature electrothermal film comprises a graphite heating body and terminals, wherein an electrode is connected with the graphite heating body; and preferably, the high-temperature electrothermal film also comprises two insulating films for sandwiching the graphite heating body therebetween. According to the high-temperature electrothermal film, a graphite heat conducting film is used as the heating body to replace a metal foil heating body; and compared with the metal foil, the graphite heat conducting film has higher emissivity, so that the high-temperature electrothermal film prepared from the graphite heat conducting film has higher electrothermal radiation efficiency compared with a metal foil electrothermal film. According to electrothermal film provided by the invention, the graphite heat conducting film is used as the heating body; the graphite heat conducting film is patterned through a die cutting method to replace sensitizing, developing and etching methods of the metal foil, so that the technological process can be simplified; and meanwhile, an etching solution is not used, so that environmental pollution is avoided.
Description
technical field [0001] The invention relates to a high-temperature electrothermal film and a preparation method thereof. Background technique [0002] The existing high-temperature electrothermal film heating element is a circuit formed by etching metal foil, and the emissivity of the metal foil is low, so the electrothermal radiation efficiency is low, which cannot meet the needs of high electrothermal radiation efficiency electric heating devices. Emissivity refers to the ratio of the radiation ability of an object to the radiation ability of a black body at the same temperature, also known as emissivity, which characterizes the radiation ability of an object to light. [0003] The electrothermal radiation conversion efficiency of the existing metal foil electrothermal film is below 20%. [0004] The main production steps of metal foil electric heating film are as follows: [0005] 1. Cover the insulating film with metal foil; [0006] 2. Cover the photosensitive film o...
Claims
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Application Information
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