CN221202780U - Electrothermal film with positive temperature coefficient characteristic - Google Patents

Electrothermal film with positive temperature coefficient characteristic Download PDF

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Publication number
CN221202780U
CN221202780U CN202323120865.5U CN202323120865U CN221202780U CN 221202780 U CN221202780 U CN 221202780U CN 202323120865 U CN202323120865 U CN 202323120865U CN 221202780 U CN221202780 U CN 221202780U
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layer
silver wire
electrothermal film
film
conductive silver
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CN202323120865.5U
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Chinese (zh)
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刘翔
张逸瑾
沈宏
马海锦
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Jiangsu Liwusheng Electronic Technology Co ltd
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Jiangsu Liwusheng Electronic Technology Co ltd
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Abstract

The utility model discloses an electrothermal film with positive temperature coefficient characteristics, which comprises a polyester film, a graphene conductive paste layer, a conductive silver wire layer, a conductive copper foil layer and a card protection film, wherein a thermal expansion resin layer is arranged outside the graphene conductive paste layer. When the electrothermal film with the positive temperature coefficient characteristic is used, the special thermal expansion resin is added into the graphene conductive slurry, so that the self resistance of the electrothermal film is increased along with the increase of the temperature when the electrothermal film is heated, the power is reduced, the characteristic that the electrothermal film controls the highest temperature is achieved, and the thermal expansion resin is added as an adhesive layer of the graphene conductive slurry, so that the production convenience and the cost of the electrothermal film are ensured, the stability of the electrothermal film is ensured, the risk caused by local overheating of the electrothermal film can be effectively prevented, and the use stability of the electrothermal film is improved.

Description

Electrothermal film with positive temperature coefficient characteristic
Technical Field
The utility model relates to the technical field of graphene electrothermal films, in particular to an electrothermal film with positive temperature coefficient characteristics.
Background
The electrothermal film with positive temperature coefficient characteristic, namely the electrothermal film with self-heating belt temperature control, is developed and improved on the basis of the common electrothermal film, is an upgraded product of the electrothermal film, is safer, saves energy and generates heat quickly, and is capable of automatically controlling temperature, and is particularly suitable for the field needing quick heating.
However, in the practical use process of the electrothermal film with the positive temperature coefficient characteristic, the local position on the electrothermal film is easy to overheat, so that the risk of burning out is caused, and defects exist.
At present, a novel electrothermal film with positive temperature coefficient characteristic is proposed to solve the defects.
Disclosure of utility model
The utility model aims to provide an electrothermal film with positive temperature coefficient characteristics, so as to solve the problem that the local position on the electrothermal film is easy to overheat, enhance the safety and stability of the electrothermal film and automatically regulate the temperature.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an electrothermal film with positive temperature coefficient characteristic, includes polyester film, graphite alkene conductive paste layer, conductive silver wire layer, conductive copper foil layer, protects the card membrane, graphite alkene conductive paste layer, conductive silver wire layer, conductive copper foil layer, protect the card membrane and all be located on the same face of polyester film, the horizontal division of polyester film is divided into central part and two side parts, the central part printing of polyester film has graphite alkene conductive paste layer, conductive silver wire layer includes the first conductive silver wire layer and the second conductive silver wire layer of mutually perpendicular setting, first conductive silver wire layer is two, is located respectively graphite alkene conductive paste layer both sides, prints on two side parts of polyester film, along vertical setting; the second conductive silver wire layers are transversely printed on the graphene conductive paste layer, and the two adjacent second conductive silver wire layers are respectively connected with the first conductive silver wire layers positioned at the two side edge parts of the polyester film; the two conductive copper foil layers are respectively positioned on two sides of the graphene conductive paste layer, are printed on two side edge parts of the polyester film and the first conductive silver wire layer, and are longitudinally arranged.
A thermal expansion resin layer is preferably provided outside the graphene conductive paste layer.
The graphene conductive paste layer is of a net structure.
The width of the first conductive silver wire layer is larger than that of the second conductive silver wire layer.
The second conductive silver wire layer is longitudinally and uniformly arranged in parallel with the graphene conductive paste layer.
And the card protection film and the polyester film are bonded by hot pressing.
Compared with the prior art, the utility model has the beneficial effects that: this electrothermal film with positive temperature coefficient characteristic has realized can effectively preventing the risk that electrothermal film local overheat leads to, through being provided with graphene conductive paste layer, first conductive silver line layer, electrically conductive copper foil layer, second conductive silver line layer between form parallel circuit, even if electrothermal film local because cause local circuit break such as overheated, also do not influence electrothermal film whole normal use to improve the stability of product.
The special thermal expansion resin is added into the graphene conductive paste layer, and is arranged outside the graphene conductive paste layer, so that the volume of the thermal expansion resin is increased and the self resistance of the electrothermal film is increased along with the increase of the temperature when the electrothermal film is heated, the power of the electrothermal film is reduced, and the characteristic that the electrothermal film controls the highest temperature is achieved. As the thermal expansion resin is added together as the bonding layer of the graphene conductive slurry, the production of the electrothermal film is convenient and fast, the cost is reduced, the stability of the electrothermal film is ensured, and the risk caused by local overheating of the electrothermal film can be effectively prevented.
The graphene conductive paste layer is of a net-shaped structure, so that the use cost of the graphene conductive paste is saved, and the temperature of the electrothermal film is increased more uniformly.
Because the first conductive silver wire layer is contacted with the conductive copper foil layer to form an electric path, the width of the first conductive silver wire layer is larger than that of the second conductive silver wire layer, and the width of the first conductive silver wire layer is increased, so that the contact surface between the first conductive silver wire layer and the conductive copper foil layer is increased, and the stability of a product is improved.
The second conductive silver wire layer is longitudinally and uniformly arranged in parallel with the graphene conductive paste layer, and the heating of the electrothermal film is more uniform.
Drawings
FIG. 1 is a schematic diagram of an explosive structure of the present utility model;
Fig. 2 is a schematic diagram of a partial structure of a graphene conductive paste layer according to the present utility model;
FIG. 3 is an enlarged schematic view of a partial cross-sectional structure of a heat-expandable resin according to the present utility model;
Fig. 4 is a schematic diagram of a partial structure of a first conductive silver wire layer and a second conductive silver wire layer according to the present utility model.
In the figure: 1. a polyester film; 2. a graphene conductive paste layer; 3. a first conductive silver wire layer; 4. a conductive copper foil layer; 5. a card protection film; 6. a thermally expandable resin layer; 7. and a second conductive silver wire layer.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1: referring to fig. 1-4, an electrothermal film with positive temperature coefficient characteristics includes a polyester film 1, a graphene conductive paste layer 2, a conductive silver wire layer, a conductive copper foil layer 4, and a card protection film 5, wherein the graphene conductive paste layer 2, the conductive silver wire layer, the conductive copper foil layer 4, and the card protection film 5 are all located on the same surface of the polyester film 1, a transverse area of the polyester film 1 is divided into a central portion and two side portions, the graphene conductive paste layer 2 is printed on the central portion of the polyester film 1, the conductive silver wire layer includes a first conductive silver wire layer 3 and a second conductive silver wire layer 7 which are mutually perpendicular, the first conductive silver wire layer 3 is two and respectively located on two sides of the graphene conductive paste layer 2, and is printed on the two side portions of the polyester film 1 and longitudinally arranged; the second conductive silver wire layers 7 are transversely printed on the graphene conductive paste layer 2, and the two adjacent second conductive silver wire layers 7 are respectively connected with the first conductive silver wire layers 3 positioned at the two side edge parts of the polyester film 1; the two conductive copper foil layers 4 are respectively positioned on two sides of the graphene conductive paste layer 2, and are printed on two side edge parts of the polyester film 1 and the first conductive silver wire layer 3, and are longitudinally arranged.
The graphene conductive paste layer 2 is provided with a thermal expansion resin layer 6 on the outside.
The graphene conductive paste layer 2 is in a net structure.
The width of the first conductive silver wire layer 3 is larger than that of the second conductive silver wire layer 7.
The second conductive silver wire layer 7 is longitudinally and uniformly arranged in parallel on the graphene conductive paste layer 2.
And the card protection film 5 is bonded with the polyester film 1 through hot pressing.
Specifically, as shown in fig. 1-4, when the electrothermal film is produced, a special thermal expansion resin 6 is added into the graphene conductive slurry, the weight percentage of the thermal expansion resin 6 is 3 to 6 times that of the graphene conductive slurry, the thermal expansion resin 6 is arranged outside the graphene conductive slurry layer 2, two groups of conductive copper foil layers 4, a first conductive silver wire 3 and a second conductive silver wire 7, are arranged to form a parallel circuit, and the two groups of conductive copper foil layers and the first conductive silver wire and the second conductive silver wire form a parallel circuit with each other.
Working principle: when the graphene conductive slurry is used, the special thermal expansion resin 6 is added into the graphene conductive slurry 2, and the thermal expansion resin 6 is added, so that the self resistance of the electrothermal film is increased along with the temperature rise when the electrothermal film is heated, the power is reduced, the characteristic that the electrothermal film controls the highest temperature is achieved, and the thermal expansion resin 6 is added as an adhesive layer of the graphene conductive slurry 2, so that the production convenience and the cost of the electrothermal film are reduced, the stability of the electrothermal film is ensured, and the risk caused by local overheating of the electrothermal film can be effectively prevented.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an electrothermal film with positive temperature coefficient characteristic, includes polyester film (1), graphite alkene conductive paste layer (2), electrically conductive silver wire layer, electrically conductive copper foil layer (4), protects card membrane (5), graphite alkene conductive paste layer (2), electrically conductive silver wire layer, electrically conductive copper foil layer (4), protect card membrane (5) all are located polyester film (1) is on same one side, its characterized in that: the transverse area of the polyester film (1) is divided into a central part and two side edge parts, the central part of the polyester film (1) is printed with a graphene conductive paste layer (2), the conductive silver wire layer comprises a first conductive silver wire layer (3) and a second conductive silver wire layer (7) which are mutually perpendicular, the two first conductive silver wire layers (3) are respectively positioned at two sides of the graphene conductive paste layer (2), and are printed on the two side edge parts of the polyester film (1) along the longitudinal direction; the second conductive silver wire layers (7) are transversely printed on the graphene conductive paste layers (2), and the two adjacent second conductive silver wire layers (7) are respectively connected with the first conductive silver wire layers (3) positioned at two side edge parts of the polyester film (1); the two conductive copper foil layers (4) are respectively positioned on two sides of the graphene conductive paste layer (2), and are printed on two side edge parts of the polyester film (1) and the first conductive silver wire layer (3) along the longitudinal direction.
2. An electrothermal film having positive temperature coefficient characteristics according to claim 1, wherein: and a thermal expansion resin layer (6) is arranged outside the graphene conductive paste layer (2).
3. An electrothermal film having positive temperature coefficient characteristics according to claim 1, wherein: the graphene conductive paste layer (2) is of a net structure.
4. An electrothermal film having positive temperature coefficient characteristics according to claim 1, wherein: the width of the first conductive silver wire layer (3) is larger than that of the second conductive silver wire layer (7).
5. An electrothermal film having positive temperature coefficient characteristics according to claim 1, wherein: the second conductive silver wire layer (7) is longitudinally and uniformly arranged in parallel with the graphene conductive paste layer (2).
6. An electrothermal film having positive temperature coefficient characteristics according to claim 1, wherein: and the card protection film (5) is bonded with the polyester film (1) through hot pressing.
CN202323120865.5U 2023-11-20 2023-11-20 Electrothermal film with positive temperature coefficient characteristic Active CN221202780U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202323120865.5U CN221202780U (en) 2023-11-20 2023-11-20 Electrothermal film with positive temperature coefficient characteristic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202323120865.5U CN221202780U (en) 2023-11-20 2023-11-20 Electrothermal film with positive temperature coefficient characteristic

Publications (1)

Publication Number Publication Date
CN221202780U true CN221202780U (en) 2024-06-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202323120865.5U Active CN221202780U (en) 2023-11-20 2023-11-20 Electrothermal film with positive temperature coefficient characteristic

Country Status (1)

Country Link
CN (1) CN221202780U (en)

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