阅读说明：本技术 一种柔性电热贴片、电热装置及其制备方法 (Flexible electric heating patch, electric heating device and preparation method thereof ) 是由 杨涛 陈令东 吴祯琪 刘兆平 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种柔性电热贴片,该柔性电热贴片从下到上依次包括保护层、胶合层和电热层,其中,所述电热层为镂空结构,且所述胶合层的至少一部分透过所述镂空结构裸露。本发明还包括一种电热装置及其制备方法,该电热装置包括基板、固定在基板上的电极层以及柔性电热贴片,所述柔性电热贴片中的胶合层透过所述镂空结构并和所述基板粘结固定。本发明加工效率高,且产品灵活度高。(The invention relates to a flexible electric heating patch which sequentially comprises a protective layer, a cementing layer and an electric heating layer from bottom to top, wherein the electric heating layer is of a hollow structure, and at least one part of the cementing layer is exposed through the hollow structure. The invention also comprises an electric heating device and a preparation method thereof, wherein the electric heating device comprises a substrate, an electrode layer fixed on the substrate and a flexible electric heating patch, and a cementing layer in the flexible electric heating patch penetrates through the hollow structure and is fixedly bonded with the substrate. The invention has high processing efficiency and high product flexibility.)

1. The utility model provides a flexible electric heat paster, its characterized in that, flexible electric heat paster from the bottom up includes protective layer, cementing layer and electric heat layer in proper order, wherein, the electric heat layer is hollow out construction, just at least some of cementing layer sees through hollow out construction exposes.

2. The flexible electric heating patch according to claim 1 wherein the electric heating layer is a coating of a carbon material comprising one or more of graphite, carbon black, graphene, carbon nanotubes or carbon crystals.

3. The flexible electrothermal patch according to claim 1, wherein the hollow structures are in the shape of stripes or in the shape of blocks arranged in an array.

4. The flexible electric heating patch according to claim 1 wherein said protective layer is a flexible film comprising one or more of plastic film, metal foil, ceramic film, flexible glass.

5. The flexible electric heating patch according to claim 1, wherein the bonding layer is made of a hot melt adhesive or a heat-resistant pressure-sensitive adhesive.

6. The flexible electrothermal patch according to claim 1, wherein the adhesive layer completely covers the electrothermal layer, and a distance between an edge of the electrothermal layer and an edge of the adhesive layer is 5mm or more.

7. An electric heating device, characterized in that, the electric heating device comprises a substrate, an electrode layer fixed on the substrate and the flexible electric heating patch of any claim 1 to 6, wherein a cementing layer in the flexible electric heating patch penetrates through the hollow structure and is fixedly bonded with the substrate.

8. The electric heating apparatus of claim 7, wherein the substrate comprises an epoxy board or a glass board.

9. The electric heating device according to claim 7, wherein the electrode layer is made of a metal foil strip or a metal paste coating;

the metal foil strip comprises one of an iron foil strip, an aluminum foil strip, a copper foil strip, a silver foil strip, a gold foil strip or an alloy foil strip, and the alloy foil strip is one or more of iron alloy, aluminum alloy, copper alloy, silver alloy or gold alloy;

the metal paste used for the metal paste coating comprises one or more of conductive silver paste, conductive copper paste or conductive aluminum paste.

10. A method of manufacturing an electric heating device according to claim 7, characterized in that the method comprises the steps of:

(1) fixing the electrode layer on a substrate;

(2) and placing the flexible electric heating patch on the electrode layer, and then enabling the cementing layer to penetrate through the hollow structure and be bonded and fixed with the substrate in a pressing mode to prepare the electric heating device.

Technical Field

The invention relates to the technical field of electric heating, in particular to a flexible electric heating patch, an electric heating device based on the patch and a preparation method of the electric heating device.

Background

The electric heating plate is an electrically driven planar rigid heating body and is a device for directly converting electric energy into heat energy. The electric heating plate is mainly used in the fields of household heating, poultry incubation, food production, fog prevention, demisting and the like. A typical electric heating plate is a multi-layer composite structure in which an epoxy resin plate or a glass plate is used as a substrate, and an electric heating layer 3, an electrode layer 4, a glue layer 2 and a protective layer 1 are sequentially arranged on the substrate 5, as shown in fig. 1.

The processing of such an electrical heating plate is generally carried out as follows:

a) preparing conductive ink with specific sheet resistance;

b) printing an electrothermal coating on a plate-shaped base material;

c) mounting an electrode on the heating coating;

d) and (5) compounding the glue film containing the cementing layer as an insulating protective layer by hot pressing to obtain the finished product of the electric heating plate. See in particular fig. 2.

However, the existing electric heating panel has the following disadvantages:

1) because the substrate is made of rigid materials, an intermittent production process is needed for coating or printing on the substrate, and the production efficiency is low;

2) the electric heating plate is required to be produced in a factory, the electric heating layer and the electrode structure are required to be fixed completely during production, and the electric heating plate with different specification requirements cannot be produced in batch, so that the cost is high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a flexible electric heating patch with high production efficiency.

The application also aims to provide an electric heating device based on the flexible electric heating patch and a preparation method of the electric heating device.

In order to achieve the object of the present invention, the present application provides the following technical solutions.

In a first aspect, the present application provides a flexible electric heat paster, flexible electric heat paster from the bottom up includes protective layer, cementing layer and electric heat layer in proper order, wherein, the electric heat layer is hollow out construction, just at least some of cementing layer sees through hollow out construction exposes.

In one embodiment of the first aspect, the electrothermal layer is a carbon material coating, and the carbon material comprises one or more of graphite, carbon black, graphene, carbon nanotubes or carbon crystals.

In an embodiment of the first aspect, the hollow structures are stripe-shaped, or the hollow structures are block-shaped arranged in an array.

In one embodiment of the first aspect, the protective layer is a flexible film, and the flexible film includes one or more of a plastic film, a metal foil, a ceramic film, and a flexible glass.

In an embodiment of the first aspect, the material of the bonding layer is a hot melt adhesive or a heat-resistant pressure-sensitive adhesive.

In one embodiment of the first aspect, the glue layer completely covers the electric heating layer, and the distance between the edge of the electric heating layer and the edge of the glue layer is greater than or equal to 5 mm.

In a second aspect, the present application provides an electric heating device, electric heating device includes the base plate, fixes electrode layer and flexible electric heat paster on the base plate, cementing layer among the flexible electric heat paster sees through hollow out construction and with the base plate bonds fixedly.

In one embodiment of the second aspect, the substrate comprises an epoxy plate or a glass plate.

In one embodiment of the second aspect, the material of the electrode layer is a metal foil strip or a metal paste coating; the metal foil strip comprises one of an iron foil strip, an aluminum foil strip, a copper foil strip, a silver foil strip, a gold foil strip or an alloy foil strip, and the alloy foil strip is one or more of iron alloy, aluminum alloy, copper alloy, silver alloy or gold alloy; the metal paste used for the metal paste coating comprises one or more of conductive silver paste, conductive copper paste or conductive aluminum paste.

In a third aspect, the application further provides a preparation method of the electric heating device, the electrode layer is fixed on the substrate, then the flexible electric heating patch is placed on the electrode layer, and then the gluing layer penetrates through the hollow structure and is bonded and fixed with the substrate in a pressing mode, so that the electric heating device is prepared.

Compared with the prior art, the invention has the beneficial effects that:

(1) the preparation speed of the flexible electric heating patch is 20-60 m/min, and the preparation speed of the traditional silk-screen printing method is only 4m/min, so that the production speed of the screen printing method is 5-15 times that of the traditional method, and the production efficiency is greatly improved;

(2) the invention can adopt the flexible electric heating patches with uniform specification, realizes different heating powers by designing different electrode mounting modes on the substrate, saves the step of frequently adjusting conductive ink and greatly reduces the workload;

(3) the flexible electric heating patch can be flexibly cut according to the appearance size of the substrate, so that complete coverage is realized, the expense for customizing a special screen printing plate is saved, and the research and development cost is effectively reduced;

(4) most of the preparation procedures of the invention can be designed and installed on site, no special installation equipment is needed, and the convenience of construction is greatly improved.

Drawings

FIG. 1 is a schematic structural diagram of a conventional electric heating plate;

FIG. 2 is a schematic view of a conventional process for manufacturing an electric heating plate;

FIG. 3 is a schematic view of the electric heating device according to the present invention;

FIG. 4 is a schematic view of the manufacturing process of the electric heating device according to the present invention;

FIG. 5 is a side view of the flexible electric heating patch of example 1;

FIG. 6 is a top view of the flexible electro-thermal patch of example 1;

FIG. 7 is a top view of the flexible electric heating patch of example 2;

FIG. 8 is a top view of the flexible electro-thermal patch of example 3;

FIG. 9 is a schematic view showing the mounting position of electrodes on a substrate in example 4;

FIG. 10 is a schematic view showing the mounting position of electrodes on a substrate in example 5;

FIG. 11 is a schematic view showing the mounting position of electrodes on a substrate in example 6;

FIG. 12 is a schematic cross-sectional view showing an electric heating apparatus in comparative example 2;

FIG. 13 is a schematic cross-sectional view of an electric heating apparatus in comparative example 3.

In the drawing, 1 is a protective layer, 2 is a glue layer, 3 is an electric heating layer, 4 is an electrode layer, and 5 is a substrate.

Detailed Description

Unless otherwise defined, technical or scientific terms used herein in the specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.

In the following detailed description of the embodiments of the present invention, reference is made to the accompanying drawings, where it is noted that in the interest of brevity and conciseness, not all features of an actual embodiment may be described in detail in this specification. Modifications and substitutions to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and scope of the present invention, and the resulting embodiments are within the scope of the present invention.

The traditional electric heating device has relatively complex production process and low production efficiency. The application aims to provide a flexible electric heating patch with high production efficiency, an electric heating device based on the patch and a preparation method of the electric heating device.

In a specific embodiment, this application provides a flexible electric heat paster, flexible electric heat paster includes protective layer, cementing layer and electric heat layer from the bottom up in proper order, wherein, the electric heat layer is hollow out construction, just the cementing layer permeable hollow out construction exposes. The exposed cementing layer can enable the flexible electric heating patch to be bonded on the substrate to form an electric heating device.

In a specific embodiment, the electrothermal layer is a carbon material coating, and the carbon material comprises one or more of graphite, carbon black, graphene, carbon nanotubes or carbon crystals.

In a specific embodiment, the hollow structures are stripe-shaped, or the hollow structures are block-shaped arranged in an array. By adopting the hollow structure, the cementing layer which penetrates through the hollow structure can be better bonded with the substrate. Preferably, the shape of each block-shaped hollow structure can be rectangular, circular, trapezoidal or the like.

In a specific embodiment, the protective layer is a flexible film, and the flexible film comprises one or more of a plastic film, a metal foil, a ceramic film and flexible glass, and is preferably a plastic film.

In a specific embodiment, the material of the bonding layer is a hot melt adhesive or a heat-resistant pressure-sensitive adhesive. When the cementing layer is heat-resistant pressure-sensitive adhesive, the flexible electric heating patch can be bonded on the epoxy resin or the glass substrate in a pressing mode. When the cementing layer is hot melt adhesive, the hot roller or the hot air gun is utilized to melt the adhesive film of the flexible electric heating patch, and simultaneously the plastic sheet is utilized to press the flexible electric heating patch to adhere the flexible electric heating patch to the epoxy resin or the glass substrate, and the patch is firmly adhered to the epoxy resin or the glass substrate after the hot melt adhesive is cooled

In one embodiment, the glue layer completely covers the electric heating layer, and the distance between the edge of the electric heating layer and the edge of the glue layer is greater than or equal to 5 mm. This setting is avoided the electric heat layer to expose, and the electric heat layer is sealed up and is deposited inside behind the preparation electric heater unit, avoids producing the potential safety hazard.

In a second aspect, the present application provides an electric heating device, electric heating device includes the base plate, fixes electrode layer and flexible electric heat paster on the base plate, cementing layer among the flexible electric heat paster sees through hollow out construction and with the base plate bonds fixedly.

Wherein, the electrode layer arranges with parallel mode, and the interelectrode distance is calculated according to following formula:

wherein d is the inter-electrode distance; u is a power supply voltage; r_□The flexible electric heating patch is provided with an electric heating layer square resistor; p_□The heating power required by the electric heating device per square meter. Preferably, the parallel mode is one or more of more than two parallel straight lines or concentric circular arcs.

In one embodiment of the second aspect, the substrate comprises an epoxy plate or a glass plate.

In one embodiment of the second aspect, the material of the electrode layer is a metal foil strip or a metal paste coating; the metal foil strip comprises one of an iron foil strip, an aluminum foil strip, a copper foil strip, a silver foil strip, a gold foil strip or an alloy foil strip, and the alloy foil strip is one or more of iron alloy, aluminum alloy, copper alloy, silver alloy or gold alloy; the metal paste used for the metal paste coating comprises one or more of conductive silver paste, conductive copper paste or conductive aluminum paste. More preferably, a copper foil strip is used.

In a third aspect, the application further provides a preparation method of the electric heating device, the electrode layer is fixed on the substrate, then the flexible electric heating patch is placed on the electrode layer, and then the gluing layer penetrates through the hollow structure and is bonded and fixed with the substrate in a pressing mode, so that the electric heating device is prepared. Pressing flexible electric heat paster, the cementing layer takes place deformation under the pressure effect, extrudes from hollow out construction and electric heat layer's periphery to bond with the base plate, finally, electric heat layer and electrode layer are inlayed in the cementing layer.