PTC (Positive Temperature Coefficient) heating sheet, low-temperature radiating electrothermal film and preparation method of low-temperature radiating electrothermal film

A technology of low temperature radiation and heating sheet, applied in electric heating devices, electrical components, ohmic resistance electrodes, etc., can solve the problems of difficult to control printing quality, shortened product life, high cost, reduce process complexity, realize continuous production, The effect of enhancing production efficiency

Inactive Publication Date: 2014-03-26
上海神沃电子有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Printing carbon-based ink-type low-temperature radiation heating film is complex in process, high in cost, and has problems such as unsatisfactory peel strength and difficult control of printing quality. Micro-cracks will appear due to cold shrinkage, which will greatly reduce the life of the product

Method used

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  • PTC (Positive Temperature Coefficient) heating sheet, low-temperature radiating electrothermal film and preparation method of low-temperature radiating electrothermal film
  • PTC (Positive Temperature Coefficient) heating sheet, low-temperature radiating electrothermal film and preparation method of low-temperature radiating electrothermal film
  • PTC (Positive Temperature Coefficient) heating sheet, low-temperature radiating electrothermal film and preparation method of low-temperature radiating electrothermal film

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preparation example Construction

[0055] see figure 1 ,2 , a method for preparing a low-temperature radiation electrothermal film of the present invention, comprising the steps of:

[0056] S1: Weigh each component according to the mass percentage ratio of 50-70% of high-density polyethylene, 20-40% of conductive filler, 5-10% of inorganic filler and 0.1-0.5% of coupling agent, and then grind the high-density polyethylene To form a powder, each component is sheared and blended by a high-speed mixer twin-screw for 10 minutes to obtain a mixed material; wherein, the conductive filler is carbon black; the inorganic filler is magnesium hydroxide.

[0057] S2: Extruding the mixed material through a single-screw T-shaped die at a temperature of 150-220°C to obtain the extruded material;

[0058] S3: pressing the extruded material to a fixed thickness through a calender at a temperature of 150° C. and flattening both edges to obtain a sheet with a thickness of 0.20 mm and a width of 0.5 m;

[0059] S4: Press the sh...

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Abstract

The invention discloses a PTC (Positive Temperature Coefficient) heating sheet, a low-temperature radiating electrothermal film and a preparation method of the low-temperature radiating electrothermal film. The PTC heating sheet comprises a substrate and conducting electrodes which are compounded on both sides of the substrate; the conducting electrodes are made of copper foils; a plurality of projections are formed on one side of each copper foil, thereby forming a rough surface; each copper foil is fixed on the substrate by thermocompression bonding through the rough surface. The PTC heating sheet, the low-temperature radiating electrothermal film and the preparation method of the low-temperature radiating electrothermal film disclosed by the invention have the advantages of simple process, low cost, high peeling strength, long service life, realization of continuous production, saving in energy, environmental friendliness, comfort, health care and wide application range.

Description

technical field [0001] The invention relates to a heating sheet, an electric heating film and a preparation method thereof, in particular to a PTC heating sheet, a low-temperature radiation electric heating film and a preparation method thereof. Background technique [0002] Low-temperature radiation electrothermal film is a low-temperature heating device that can generate heat after being energized. It is mainly used for residential heating. As an important way to replace water heating, it can be used for heating in rural areas in northern my country or in southern China in winter, and in large cities in the north that need to control pollution sources. heating. The material used to make the low-temperature radiation electric heating film has a positive temperature effect, so this type of electric heating film has a good self-limiting temperature function. The common electrothermal film on the market is made of conductive ink printing, metal electrode strips are processed, ...

Claims

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Application Information

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IPC IPC(8): H05B3/03H05B3/10H05B3/34
Inventor 曾贤瑞侯李明臧育锋何志勇史宇正
Owner 上海神沃电子有限公司
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