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Preparation method of far-infrared electric heating film

An electric heating film and heating film technology, applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of low electrothermal conversion rate, substrate detachment, short life, etc.

Active Publication Date: 2020-09-22
宁波晨中热膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems such as low electrothermal conversion rate, uneven heating, fast power decay, short life, high cost due to the use of precious metals, easy separation from the substrate, etc.

Method used

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  • Preparation method of far-infrared electric heating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A preparation method of a far-infrared electric heating film, comprising the following steps:

[0073] 1. Preparation of electric heating film base material:

[0074] (1) Making electric heating material: take 30 parts by weight of colloidal graphite powder, 30 parts of conductive carbon black powder, and 2 parts of aluminum oxide powder, and mix them in a powder mixer under normal temperature conditions Standby after 4h, mixing speed 55rpm;

[0075] Among them, the particle size of colloidal graphite powder is less than 4 μm; the particle size of conductive carbon black powder is less than 15 μm; the particle size of aluminum oxide powder is less than 50 μm;

[0076] (2) Make conductive paste masterbatch: take by weight 10 parts of powder prepared in step (1), 70 parts of dimethylacetamide, mix and grind for 60 min under normal temperature conditions in a grinder, and grind at a speed of 1100 rpm, use After filtering through a sieve, it is ready for use;

[0077] (3...

Embodiment 2

[0087] A preparation method of a far-infrared electric heating film, comprising the following steps:

[0088] Compared with Example 1, the preparation method of Example 2 is the same as the operation and process parameters of Example 1, the difference is that the selection of raw materials is specifically: the particle size of the colloidal graphite powder is less than 15 μm; the particle size of the conductive carbon black powder is less than 15 μm; The particle size of the aluminum oxide powder is less than 50 μm.

Embodiment 3

[0090] A preparation method of a far-infrared electric heating film, comprising the following steps:

[0091] Compared with Example 1, the preparation method of Example 3 is the same as the operation and process parameters of Example 1, the difference is that the selection of raw materials is specifically: the particle size of the colloidal graphite powder is less than 50 μm; the particle size of the conductive carbon black powder is less than 50 μm; The particle size of the aluminum oxide powder is less than 50 μm.

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Abstract

The invention relates to a far infrared electric heating film and a preparation method thereof. The electric heating film is a multi-layer mechanism, and comprises colloidal graphite powder, conductive carbon powder, aluminum oxide powder, a supporting material, polyimide paint and an insulating layer. The preparation method mainly comprises the steps of preparing an electrothermal film base material and assembling the electrothermal film, and the prepared electrothermal film has the characteristics of excellent electrothermal conversion rate, uniform heating, slow power attenuation, long service life and the like, and can be widely applied to the fields of industry, civil use, military use, agriculture, intelligent wearing and the like.

Description

technical field [0001] The invention relates to the field of electric heating films, in particular to a far-infrared electric heating film and a preparation method thereof. Background technique [0002] At present, electric heating has become the most common heating method in family life or industrial production. Commonly used heating sources include: resistance wire, quartz tube, PTC, infrared and electric heating film. Electric heating film has been introduced from abroad for decades. Due to its convenient use and wide application range, it has been more and more used in various industries. [0003] The invention patent with the Chinese patent publication number CN100455146A discloses a carbon material electric heating film and its preparation method. Confirm, add carbon black dispersant at the same time, after the dispersion is uniform, first add conductive carbon black to disperse for 0.5 to 1 hour, then add graphite carbon powder and stabilizer to disperse for 0.5 to ...

Claims

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Application Information

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IPC IPC(8): H05B3/14H05B3/36
CPCH05B3/14H05B3/36
Inventor 陈彬陈宏富
Owner 宁波晨中热膜科技有限公司
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