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Composite of electric heating film and made electric heating film and electric heating device

A technology of electrothermal film and composition, which is applied to electrothermal devices, ohmic resistance heating, electrical components, etc., can solve the problems of uneven surface resistance distribution, surface resistance distribution, and surface temperature unevenness of electrothermal film, so as to improve the uneven distribution of resistance. , the heating rate is fast, the effect of increasing safety

Inactive Publication Date: 2008-08-06
MESOTEC +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the applicant thought of a method of adsorbing a conductive coating on a fibrous material to obtain a composition for an electrothermal film, and then to improve the problem of uneven surface resistance distribution of the obtained electrothermal film. The applicant speculated that the The fibrous material includes a plurality of fibers connected to each other to form a network, so the majority of conductive particles that were originally randomly dispersed in the conductive paint can be concentrated on or near the fibers, and a network is formed by the concentration of the conductive particles along the network. Conduct electricity through the electrical conduction path to improve the surface resistance distribution and surface temperature unevenness caused by the uneven surface conductivity and the cracking of the heated body

Method used

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  • Composite of electric heating film and made electric heating film and electric heating device
  • Composite of electric heating film and made electric heating film and electric heating device
  • Composite of electric heating film and made electric heating film and electric heating device

Examples

Experimental program
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Effect test

Embodiment 1

[0072] The operation steps of embodiment 1 are as follows:

[0073] (1) A nano-scale carbon black A is placed in an oven, baked at 100° C. for 1 hour, and then sieved with a 100-mesh screen;

[0074] (2) adding the nano-scale carbon black A to the epoxy resin A in fractions to form a mixture of the nano-scale carbon black A and the epoxy resin A in a weight ratio of 5:95;

[0075] (3) adding an appropriate amount of toluene to form a resin solution with a viscosity between 32 and 38 cps;

[0076] (4) Using a high-torque fast stirrer, stir the resin solution at a speed of 300 r.p.m for 15 minutes, so that the nano-scale carbon black A is evenly dispersed therein, to prepare a conductive coating;

[0077] (5) Immerse a polypropylene breathable non-woven fabric in the conductive coating for 1 minute;

[0078] (6) Take out the non-woven fabric from the conductive coating and press and suck it with a pressure dyeing tester, wherein the pressure is 1.5kg / cm 2 , the composition fo...

Embodiment 2 to 6

[0080] Embodiments 2 to 6 obtain the electrothermal film composition in steps similar to those in Embodiment 1, except that the weight ratios of the nanoscale carbon black A to the epoxy resin A are 10 / 90; 15 / 85; 20 / 80; 25 / 75; 30 / 70.

Embodiment 7

[0082] In Example 7, the electrothermal film composition was obtained by the steps similar to those in Example 1, except that the nano-scale carbon black A was replaced by a nano-scale carbon black B.

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Abstract

The invention provides an electrothermal film constituent, and is characterized in that: the constituent comprises a fibrous material and conductive paint, wherein the fibrous material comprises a plurality of fibers connected into a network; the conductive paint is absorbed on the fibers and comprises an adhesive and a carbon conductive material, with the ratio of the weight percentage of the adhesive to that of the carbon conductive material between 20:1 and 4:6. The carbon conductive material is selected from or is a combination of micron-sized carbon soot particles, nano-sized carbon soot particles, micron-sized graphite particles, nano-sized graphite particles, micron-sized carbon fibers, nano-sized carbon fibers and carbon nanotubes.

Description

technical field [0001] The present invention relates to a composition for electric heating film, in particular to a composition for electric heating film having a fibrous material, and the fibrous material has a plurality of fibers connected to each other to form a network, and a thermally cured Or an electrothermal film formed by sintering the electrothermal film composition and an electrothermal device containing the electrothermal film. Background technique [0002] The working principle of the known electrothermal devices is mostly to convert electrical energy into thermal energy through the resistance effect generated when electricity is turned on, so as to achieve the purpose of heating. Generally speaking, there are two main methods of resistance heating: direct heating and indirect heating, in which direct heating is to pass current directly through a heated object, and indirect heating is to transfer heat to the heated object by passing electricity to a heating elem...

Claims

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Application Information

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IPC IPC(8): H05B3/14H05B3/34
CPCH05B2214/04
Inventor 蔡宜寿游静君蔡佩容庄钰坪宋照鸿
Owner MESOTEC
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