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Method for preparing double-faced flexible aluminum foil by electrostatic coating of polymer composite PTC (positive temperature coefficient) powder

An electrostatic coating and polymer technology, applied in liquid spraying equipment, non-metallic conductors, resistors with positive temperature coefficients, etc., can solve the problems of limiting the application of PTC materials, difficult control of processing uniformity, etc., to improve production efficiency And high-quality product rate, strong consistency of product thickness, and convenient capacity adjustment

Inactive Publication Date: 2014-05-21
ZHONGYUAN ENGINEERING COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Due to the characteristics of barium titanate ceramic materials, the processing of PTC materials is difficult to control the uniformity of traditional processing, which limits the application of PTC materials.
[0006] Due to the limitations of the traditional preparation of PTC components, PTC components and electrodes are processed separately, and then welded or glued to the plate to form a device, mainly small components, and there is no report on the processing of huge ultra-thin functional aluminum foil

Method used

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  • Method for preparing double-faced flexible aluminum foil by electrostatic coating of polymer composite PTC (positive temperature coefficient) powder
  • Method for preparing double-faced flexible aluminum foil by electrostatic coating of polymer composite PTC (positive temperature coefficient) powder

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Embodiment 1

[0023] Such as figure 1 with figure 2 As shown, the method for preparing double-sided flexible aluminum foil by electrostatically coating polymer composite PTC powder in this embodiment includes the following steps: (1) Take 100g of polyethylene and 100g of carbon black, and put them in a ball mill under the protection of nitrogen. Mix for 5 hours to obtain polymer composite PTC powder; (2) The electrolytic aluminum foil with a thickness of 5μm is discharged through the unwinding device 1, and the discharged electrolytic aluminum foil is heated to 250°C by the heating device 2, and the width is 1.3 meters. , The electrostatic coating equipment 3 with a length of 5 meters is continuously coated for 600 meters at a speed of 50 meters per minute, and the coating thickness of the polymer composite PTC powder is controlled by the flow control valve 4 provided on the electrostatic coating equipment to 2.5 μm, it is cooled and crystallized by the cooling device 5, and then enters the...

Embodiment 2

[0025] The method for preparing double-sided flexible aluminum foil by electrostatically coating polymer composite PTC powder in this embodiment includes the following steps: (1) Take 10g of polypropylene and 100g of barium titanate powder and put them in a three-screw blending reaction under the protection of nitrogen. In the container, mix for 4 hours to obtain polymer composite PTC powder; (2) The electrolytic aluminum foil with a thickness of 3μm is discharged through the unwinding device, and the discharged electrolytic aluminum foil is heated to 160°C by the heating device, and the width is 1.3 The coating thickness of the polymer composite PTC powder is controlled to be 1μm through the flow control valve set on the electrostatic coating equipment on the electrostatic coating equipment with a length of 5 meters for 600 meters continuously at a speed of 50 meters / min. The crystallization is cooled by the cooling device, and then it enters the winding device to complete the ...

Embodiment 3

[0027] The method for preparing double-sided flexible aluminum foil by electrostatically coating polymer composite PTC powder in this embodiment includes the following steps: (1) Take 50 g of polyimide and 100 g of barium titanate powder with a mass percentage of 1.3% strontium. Put it into a three-screw blending reactor under the protection of nitrogen and mix for 5 hours to obtain polymer composite PTC powder; (2) The electrolytic aluminum foil with a thickness of 15μm is discharged through the unwinding device, and the discharged electrolytic aluminum foil is discharged through the heating device Heated to 250°C, on the electrostatic coating equipment with a width of 1.3 meters and a length of 5 meters, continuous coating for 600 meters at a speed of 50 meters per minute. The polymer is controlled by the flow control valve set on the electrostatic coating equipment The coating thickness of the composite PTC powder is 2.5μm, it is cooled and crystallized by the cooling device,...

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Abstract

The invention discloses a method for preparing a double-faced flexible aluminum foil by electrostatic coating of polymer composite PTC (positive temperature coefficient) powder. The method includes the steps: (1) preparing the polymer composite PTC powder; (2) heating the aluminum foil to reach the temperature of 250-400 DEG C by the aid of a heating device, coating the polymer composite PTC powder manufactured in the step (1) on the aluminum foil by the aid of an electrostatic coating device, and forming a polymer composite PTC powder coating on the aluminum foil; (3) baking the aluminum foil coated with the polymer composite PTC powder coating in the step (2) to obtain the double-faced flexible aluminum foil by the aid of a recrystallization process. Compared with the prior art, the machining process of the method is simple and convenient, production efficiency and yield can be improved, consistency of product thicknesses is high, the quality reliability of the manufactured double-faced flexible PTC aluminum foil is high, thermal sensitive reaction is fast and accurate, and volume is conveniently adjusted.

Description

Technical field [0001] The invention relates to a method for preparing double-sided flexible aluminum foil, in particular to a method for preparing double-sided flexible aluminum foil by electrostatically coating polymer composite PTC powder. Background technique [0002] With the rapid development of science and technology, the demand for functional aluminum foils in various industries, especially composite materials, electronic materials, and decorative materials, is increasing. Functional aluminum foil has now become a key material for PCBs that play a role in supporting and interconnecting components in functional energy and electronic products. It is hailed as a "neural network" for electronic product signal and power transmission and communication. As the basic material of the electronics industry, aluminum foil has been following the development of PCB technology, and PCB technology has been continuously improved with the rapid development of electronic products. The deve...

Claims

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Application Information

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IPC IPC(8): H01B1/06H01C7/02B05B5/08
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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