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Low-voltage transparent electrothermal film and preparation process thereof

An electrothermal film and low-voltage technology, applied in the field of transparent electrothermal film and its preparation, can solve the problems of burning the electrothermal film, lowering the operating voltage, poor heating uniformity, etc., so as to improve the heating temperature, reduce the resistance, and ensure the uniformity of heating. sexual effect

Inactive Publication Date: 2015-08-26
冯冠平 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2) The wire diameter of the conductive connection film is less than 5 μm, and it is easy to be burned when using conventional metal materials to make the electric heating film invalid.
However, patterned electrodes also use transparent conductive materials. Because transparent conductive materials have poor conductivity, it is difficult to obtain the effect of reducing the voltage after introducing patterned electrodes. Therefore, multi-layer (5-6 layers) graphene must be used to reduce resistance. Reduce the use of voltage
In addition, if two parallel electrodes are used instead of patterned electrodes, the heating uniformity obtained is poor, and the difference between the highest point and the lowest point of temperature is more than 60K, which is difficult to meet the practical requirements

Method used

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  • Low-voltage transparent electrothermal film and preparation process thereof
  • Low-voltage transparent electrothermal film and preparation process thereof
  • Low-voltage transparent electrothermal film and preparation process thereof

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Experimental program
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Effect test

Embodiment 1

[0115] see figure 2 , 3 As shown, single-layer graphene is used as a low-voltage transparent electrothermal film for heating components, and the electrodes are printed with silver paste.

[0116] The preparation process is as follows:

[0117] 1. Transfer a layer of graphene on a PET (transparent substrate) with an area of ​​150mm×150mm and a thickness of 125μm. The graphene has been doped and the square resistance is 250Ω / □;

[0118] 2. Use screen printing equipment to print the silver paste electrode pattern on the transferred graphene, the shape of the pattern is as follows: figure 2 As shown, the internal electrode spacing is 6mm, the width is 1mm, and the thickness of the silver paste is 25μm;

[0119] 3. Bake the printed electrode pattern in an oven to solidify the silver paste. The baking temperature is 130°C for 40 minutes.

[0120] The initial temperature is room temperature (22°C). In this case, connect the lead wires to the positive and negative poles of the 5...

Embodiment 2

[0130] In this embodiment, two layers of graphene are used as the low-voltage transparent electrothermal film of the heating member, and the electrodes are printed with silver paste.

[0131] 1. Transfer two layers of graphene on a PET (transparent substrate) with an area of ​​120mm×120mm and a thickness of 125μm. The graphene has been doped and the square resistance is 120Ω / □;

[0132] 2. Use screen printing equipment to print the silver paste electrode pattern on the transferred graphene, the shape of the pattern is as follows: Figure 4 As shown, the outer diameter of the bus bar is 96mm, the longest inner electrode is 73mm, and the distance between the inner electrodes is 6mm. A total of 17 intervals are generated, with a width of 1mm and a bus bar width of 8mm. On the bus bar, from the first inner electrode to the last The length of an internal electrode stop is 130mm, and the thickness of the silver paste is 25μm;

[0133] 3. Bake the printed electrode pattern in an ove...

Embodiment 3

[0145] see Figure 5 As shown, the single-layer graphene is used as a low-voltage transparent electrothermal film for heating components, and the preparation process is as follows:

[0146] 1. Lay the copper foil with the grown graphene (graphene is doped, the square resistance is 250Ω / □) and the PET with the size of 150mm×300mm and the thickness of 125μm through UV glue, and the size of the copper foil is 140mm×280mm , with a thickness of 25 μm;

[0147] 2. Curing the UV glue, the wavelength is 365nm, and the energy is 1000mJ / cm 2 ;

[0148] 3. Use screen printing equipment to print a peelable mask on the laminated copper foil, the pattern shape is as follows Figure 5 As shown, at this time, it is equivalent to the electric heating film being divided into two, forming the effect of connecting the left and right electric heating films in series, the actual utilization voltage is halved, the internal electrode spacing is 3mm, the length is 108mm, and the width is 1mm. There...

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Abstract

The invention discloses a low-voltage transparent electrothermal film which comprises a transparent base material, a transparent conductive layer and electrodes. The transparent conductive layer is formed on at least one side of the transparent base material; the electrodes are formed by bus bars and a plurality of inner electrodes, wherein the inner electrodes extend oppositely from the bus bars to form interdigital electrodes; and the electrodes are arranged on the transparent conductive layer and are in electrical contact with the transparent conductive layer. Through the arrangement of the bus bars and the inner electrodes, distance between two electrodes is reduced and resistance of the transparent conductive layer between the two electrodes is reduced, so that low-voltage power supply can be used, and the voltage of a daily lithium battery can be used normally, and a temperature of 90-180 DEG C can be reached quickly by heating. The two surfaces of graphene can be provided with two sets of electrodes respectively, and the inner electrodes of the two sets of electrodes are staggered for a certain distance, so that heating uniformity can be further ensured, and heating temperature is improved under the same low voltage.

Description

technical field [0001] The invention relates to a transparent electric heating film and a preparation process thereof, in particular to a low-voltage transparent electric heating film and a preparation method thereof. Background technique [0002] The transparent heating film is usually coated with a transparent conductive coating on the surface of the film, and then a conductive electrode is made on the surface of the conductive coating. The electrodes are usually two parallel metal strips. The two metal strips are respectively connected to the positive and negative poles of the power supply. The current flows through the transparent conductive coating. layers generate heat, such as figure 1 Shown (referring to the patent that publication number is CN103828482A). At present, the commonly used transparent conductive layers such as graphene, carbon nanotubes, ITO, FTO, AZO, etc. have a large sheet resistance when the film thickness is thin, which makes it necessary to use a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/84
CPCH05B3/86
Inventor 冯冠平谭化兵刘海滨
Owner 冯冠平
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