Electrothermal film and preparation method

A technology of electric heating film and conductive heating layer, which is applied in the direction of electric heating device, ohmic resistance heating, ohmic resistance heating parts, etc., can solve the problems of affecting the service life of the product, increasing the complexity of the process, and heat loss, etc., so as to improve the utilization rate, Effect of large heating area and reduced usage

Pending Publication Date: 2018-01-09
WUXI GRAPHENE FILM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are mainly the following shortcomings: 1. It is easy to cause appearance damage such as breakage during processing; 2. There will be unavoidable contact resistance between the small film and the small film in series, which will cause unnecessary heat loss and affect the product quality. Service life; 3. At the same time, in order to ensure the uniformity of the overall heating, it is necessary to divide the resistance value of each film in detail to ensure the overall heating effect, which increases the complexity of the process
[0004] The existing large-size heating products do not solve the above problems well; this patent solves the above problems by designing a large-size series connection scheme

Method used

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Embodiment 1

[0076] Such as image 3 , 4 As shown, an embodiment of the present invention provides an electrothermal film.

[0077] The specific structure includes: a conductive heating layer 1, including an intermediate discontinuous zone 10, which divides the conductive heating layer into symmetrical first conductive parts 11 and second conductive parts 12; a wire layer 2, which includes Several thick wires and several thin wires, distributed on the surface of the conductive heating layer or embedded in the conductive heating layer, are used to connect the positive and negative electrodes of the power supply, and introduce current into the conductive heating layer, so that the heating layer is divided into several conductive heating units connected in series ; the substrate 4 , which is used as a carrier for the conductive heating layer, and is used to support the conductive heating layer; and the protective layer 3 . The conductive heating layer adopts a conductive film, such as an IT...

Embodiment 2

[0098] This embodiment provides a kind of preparation method of large-scale graphene heating film, first according to Figure 4 The dimensions and resistance requirements of the products shown, design the wire layer pattern structure as follows Figure 5 shown.

[0099] see Figure 18 As shown, the process flow of large-scale graphene heating film is as follows:

[0100] 1) Select 125 micron PET as the substrate;

[0101] 2) transfer two layers of graphene film to the substrate;

[0102] 3) Pattern the entire graphene film by laser direct writing, so that the graphene as the wire connection area is removed, exposing the surface of the substrate film (such as Figure 20 , black is cleared area);

[0103] 4) Print silver paste wires to overlap the silver paste and graphene surface to form a complete heating circuit;

[0104] 5) Paste the optical glue and cut the shape to form a complete large-size heating film.

Embodiment 3

[0106] This embodiment provides a kind of preparation method of large-scale ITO heating film, first according to Figure 4 The dimensions and resistance requirements of the products shown, design the wire layer pattern structure as follows Figure 5 shown.

[0107] see Figure 19 As shown, the process flow of large-size ITO heating film is as follows:

[0108] 1) Select a 50-micron thick ITO conductive film as the base + conductive heating layer;

[0109] 2) Pattern the entire ITO film by laser direct writing, so that the ITO as the wire connection area is removed, exposing the surface of the base film (such as Figure 20 , black is cleared area);

[0110] 3) Print silver paste wires, so that the silver paste overlaps with the ITO surface to form a complete heating circuit;

[0111] 4) Paste the optical adhesive and cut the shape to form a complete large-size heating film.

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Abstract

The invention provides an electrothermal film and a preparation method. The electrothermal film comprises a conductive heating layer having an intermediate broken belt. The conductive heating layer issegmented by the intermediate broken belt into a first conductive part and a second conductive part, which are symmetrical. The electrothermal film comprises a lead layer having a plurality of thickleads and a plurality of thin leads, which are disposed on the surface of the conductive heating layer or embedded in the conductive heating layer for connecting the positive pole and the negative pole of the power supply. The current is introduced into the conductive heating layer so that the heating layer is divided into a plurality of conductive heating units in series connection. The inventionis advantageous in that a larger heating area can be realized under the condition of the same area, and the utilization rate of film can be increased; Compared with the series connection of normal small film heating plates, approximately 20% of lead layer materials (generally silver paste or copper paste) can be saved, and production cost can be reduced.

Description

technical field [0001] The invention relates to a large-size heating film and a preparation method thereof, in particular to an electric heating film. Background technique [0002] Existing large-scale heating products such as graphene heating paintings, large-scale heating products or heating physiotherapy products mainly use small-film heating sheets made of patent No. CN105517215A. The general size is about 134*81mm, and it is made by connecting N multi-film small pieces in series after post-processing. In the prior art, the reason why the corresponding large-size heating film is not directly produced is that one of the important factors is that if the large-size heating product is manufactured directly according to the patent CN105517215A method, the starting end of the wire will be seriously heated due to the excessively long wire. The local temperature is seriously high, which seriously affects the safety and life of the product. [0003] And another kind of referenc...

Claims

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Application Information

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IPC IPC(8): H05B3/20H05B3/02H05B3/12H05B3/14
CPCY02B30/00
Inventor 王红福刘海滨袁凯谭化兵
Owner WUXI GRAPHENE FILM
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