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Benzoxazine resin-based high-power carbon crystal electric heating plate as well as preparation method and application thereof

A benzoxazine and resin-based technology, applied in the field of benzoxazine resin-based high-power carbon crystal electric heating plate and its preparation, can solve the problems of low power, potential safety hazards, limited heat resistance of epoxy resin, etc. problem, to achieve the effect of extending the thermal distance and reducing the cost

Inactive Publication Date: 2020-09-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] ①The power is not high
[0006] ② There are potential safety hazards
Due to the use of carbon powder (also called carbon crystal) instead of carbon fiber, this electric heating plate is called a carbon crystal electric heating plate, but the existing reported carbon crystal electric heating plates all use traditional epoxy resin, which is limited by the epoxy resin. Heat resistance, the power of this kind of carbon crystal electric heating plate is <800W (size 0.6m×1.0m), most of them are concentrated in 300-500W, and there is still the problem of low power

Method used

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  • Benzoxazine resin-based high-power carbon crystal electric heating plate as well as preparation method and application thereof
  • Benzoxazine resin-based high-power carbon crystal electric heating plate as well as preparation method and application thereof
  • Benzoxazine resin-based high-power carbon crystal electric heating plate as well as preparation method and application thereof

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preparation example Construction

[0040] In a second aspect, a method for preparing the benzoxazine resin-based high-power carbon crystal electric heating plate is provided, including the following steps:

[0041] The conductive filler, dispersant and solvent are mixed and ball milled to obtain a composite conductive agent, and the composite conductive agent, benzoxazine resin, modified silicone resin and additives are mixed and ground to prepare a carbon crystal conductive ink;

[0042] Screen-print carbon crystal conductive ink on the first insulating layer prepreg, heat and cure, and then cover the second insulating layer prepreg on the conductive ink layer;

[0043] Heating and curing again, and then post-processing, that is.

[0044] In some embodiments, in the carbon crystal conductive ink, the mass ratio of conductive filler, dispersant, resin and solvent is 3-5:1:1.5-2.5:2.5-3.5.

[0045] The third aspect provides the application of the benzoxazine resin-based high-power carbon crystal electric heatin...

Embodiment 1

[0048] Such as figure 1As shown, the high-power carbon crystal electric heating plate mainly includes glass cloth reinforced benzoxazine resin insulating layer I, carbon crystal conductive ink layer 2 and copper foil tape 3 . The middle ink layer is encapsulated up and down by benzoxazine resin / glass fiber insulating layer I and benzoxazine resin / glass fiber insulating layer II, and the copper foil strip 3 as an electrode is also encapsulated in carbon crystal conductive ink 1 and resin / between the glass fiber insulating layer I2, and / or the carbon crystal conductive ink and the benzoxazine resin / glass fiber insulating layer II6, are connected to the wire 5 through the welding point 4, and sealed by the silicone resin.

[0049] Each of the benzoxazine resin / glass fiber insulating layer I and the benzoxazine resin / glass fiber insulating layer II includes cured benzoxazine resin, and glass cloth as a reinforcing material for the resin.

[0050] The size of the carbon crystal ...

Embodiment 2

[0066] Soak the glass cloth in the benzoxazine resin solution, dry and remove the solvent to obtain the benzoxazine resin / glass fiber prepreg, the glue content is about 50%.

[0067] Spread the benzoxazine resin / glass fiber prepreg flat, lay copper foil tape on it, and then press molding at a temperature of 180°C and a pressure of 6MPa; the above-mentioned pressed benzoxazine resin / glass fiber prepreg The material is screen printed, and after printing the carbon crystal conductive ink, it is cured at a temperature of 180°C; after the curing is completed, it is covered with benzoxazine resin / glass fiber prepreg again. Finally, it is cured and formed at a temperature of 170°C, a pressure of 8MPa, and a time of 180 minutes, and then heat-treated in an oven at 200°C for 120 minutes. The copper foil electrode and the wire are connected by welding to make a carbon crystal electric heating plate.

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Abstract

The invention discloses a benzoxazine resin-based high-power carbon crystal electric heating plate as well as a preparation method and application thereof. The electric heating plate is sequentially provided with a first insulating layer, a carbon crystal conductive ink layer and a second insulating layer from one side to the other side, wherein a metal sheet electrode is arranged between the inklayer and the insulating layer; resin in the carbon crystal conductive ink layer comprises benzoxazine resin and modified organic silicon resin; and the first insulating layer and the second insulating layer are both made of benzoxazine resin. The glass-transition temperature of the benzoxazine resin is relatively high, so that the oxidation speed of the heating layer during long-time working canbe reduced, and the service life of the electric heating plate can be integrally prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric heating, and relates to a benzoxazine resin-based high-power carbon crystal electric heating plate and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Carbon fiber electric heating plate is a new type of electric heater that has appeared on the market in recent years. The carbon fiber electric heating plate is composed of a sandwich structure: the upper and lower layers are insulating layers, and the middle is a carbon paper heating layer containing carbon fiber. Its working principle is that the carbon fiber will radiate far-infrared rays when it ...

Claims

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Application Information

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IPC IPC(8): H05B3/28
CPCH05B3/286
Inventor 鲁在君牟浩然王凯
Owner SHANDONG UNIV
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