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Low-voltage transparent electrothermal film, preparation process thereof, high-temperature electrothermal sheet and preparation process thereof

An electric heating film and low voltage technology, applied in the field of transparent electric heating film and its preparation, can solve the problems of burning the electric heating film, poor heating uniformity, lowering the use voltage, etc. small effect

Active Publication Date: 2016-04-20
GRAHOPE NEW MATERIALS TECH INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, preparation process thereof, high-temperature electrothermal sheet and preparation process thereof
  • Low-voltage transparent electrothermal film, preparation process thereof, high-temperature electrothermal sheet and preparation process thereof
  • Low-voltage transparent electrothermal film, preparation process thereof, high-temperature electrothermal sheet and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] See figure 2 , 3 As shown, a single-layer graphene is used as a low-voltage transparent electric heating film for heating components, and the electrodes are printed with silver paste.

[0194] The preparation process is as follows:

[0195] 1. Transfer a layer of graphene on 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 / □;

[0196] 2. Use screen printing equipment to print the silver paste electrode pattern on the transferred graphene, the pattern shape is like figure 2 As shown, the distance between the inner electrodes is 6mm, the width is 1mm, and the thickness of the silver paste is 25μm;

[0197] 3. Put the printed electrode pattern in an oven and bake to solidify the silver paste. The baking temperature is 130°C and the time is 40 minutes.

[0198] The initial temperature is room temperature (22°C). In this case, connect the leads to the positive and negative electrodes of ...

Embodiment 2

[0209] In this embodiment, two layers of graphene are used as the low-voltage transparent electric heating film of the heating member, and the electrodes are printed with silver paste.

[0210] 1. Transfer two layers of graphene on 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 / □;

[0211] 2. Use screen printing equipment to print the silver paste electrode pattern on the transferred graphene, the pattern shape is like 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 gaps are generated. The width is 1mm and the width of the bus bar is 8mm. On the bus bar, the first inner electrode reaches the end. The length of an inner electrode stop is 130mm, and the thickness of silver paste is 25μm;

[0212] 3. Put the printed electrode pattern in an oven and bake to solidify the si...

Embodiment 3

[0225] See Figure 5 As shown, the low-voltage transparent electric heating film with single-layer graphene as the heating member is prepared as follows:

[0226] 1. The copper foil with well-grown graphene (graphene is doped, the square resistance is 250Ω / □) and the PET with the size of 150mm×300mm and the thickness of 125μm are bonded together through UV glue. The copper foil size is 140mm×280mm. , The thickness is 25μm;

[0227] 2. Curing the UV glue with a wavelength of 365nm and an energy of 1000mJ / cm 2 ;

[0228] 3. Use screen printing equipment to print a peelable mask on the bonded copper foil, the pattern shape is like 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 are 32 strips in total. Generate 30 inter...

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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. The 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; at the same time, the invention also relates to a high-temperature electric heating sheet and a preparation process thereof; a transparent electric heating film and a high-temperature electric heating sheet All belong to the field of electric heating film. Background technique [0002] The transparent heating film usually uses a transparent conductive coating on the surface of the film material, and then a conductive electrode is made on the surface of the conductive coating. The electrode is usually two parallel metal strips. The two metal strips are connected to the positive and negative electrodes of the power supply. The current flows through the transparent conductive coating. Layer generates heat such as figure 1 As shown (see the patent publication number CN1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/86
CPCH05B3/86
Inventor 冯冠平刘海滨谭化兵
Owner GRAHOPE NEW MATERIALS TECH INC
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