Method for preparing flexible double-sided aluminum foil by spraying polymer composite positive temperature coefficient (PTC) powder through powder spraying device

A powder spreading device and polymer technology, applied in the field of double-sided flexible aluminum foil preparation, can solve the problems of limiting the application of PTC materials and difficult control of processing uniformity, so as to improve production efficiency, high-quality product rate, and product thickness consistency Strong, easy capacity adjustment effect

Inactive Publication Date: 2014-05-14
ZHONGYUAN ENGINEERING COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 flexible double-sided aluminum foil by spraying polymer composite positive temperature coefficient (PTC) powder through powder spraying device
  • Method for preparing flexible double-sided aluminum foil by spraying polymer composite positive temperature coefficient (PTC) powder through powder spraying device

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Effect test

Embodiment 1

[0022] Such as figure 1 and figure 2 As shown, the method of spraying polymer composite PTC powder in this example to prepare double-sided flexible aluminum foil includes the following steps: (1) Take 140g polyethylene and 140g carbon black and put them into a three-screw blending reactor In the process, the blended particles were pulverized with a ball mill and mixed for 5 hours to obtain a polymer composite PTC powder; (2) The electrolytic aluminum foil with a thickness of 5 μm was discharged through the unwinding device 1, and the discharged electrolytic aluminum foil was discharged through the heating device 2 The aluminum foil is heated to 160°C. On the powder spreading device 3 with a width of 1.3 meters and a length of 16 meters, it is continuously coated at a speed of 50 m / min for 600 meters, and the flow control valve 4 provided on the powder spreading device controls the height. Molecular composite PTC powder is coated with a thickness of 2.5 μm, cooled and crystal...

Embodiment 2

[0024] The method for preparing double-sided flexible aluminum foil by spraying polymer composite PTC powder with the powder spreading device in this embodiment includes the following steps: (1) Take 20 g of polypropylene and 100 g of carbon fiber and put them into a three-screw blending reactor. The mixed particles are pulverized with a ball mill and mixed for 4 hours to obtain a polymer composite PTC powder; (2) Release the electrolytic aluminum foil with a thickness of 3 μm through the unwinding device, and heat the released electrolytic aluminum foil to 220°C through the heating device , on a powder spreading device with a width of 1.3 meters and a length of 16 meters, continuously coat 600 meters at a speed of 50 m / min, and control the polymer composite PTC powder coating through the flow control valve 4 provided on the powder spreading device The thickness is 1 μm, cooled and crystallized by the cooling device, and then enters the winding device to complete the double-sid...

Embodiment 3

[0026] The method for preparing double-sided flexible aluminum foil by spraying the polymer composite PTC powder with the powder spreading device in this embodiment includes the following steps: (1) Take 140 g of polyimide and 140 g of barium titanate micropowder with a lead content of 1.4% by mass , put it into a three-screw blending reactor, crush the blended particles with a ball mill, and mix for 5 hours to obtain a polymer composite PTC powder; (2) Release the electrolytic aluminum foil with a thickness of 15 μm through the unwinding device, The discharged electrolytic aluminum foil is heated to 280°C by a heating device, and continuously coated for 800 meters at a speed of 50 m / min on a powder spreading device with a width of 1.3 meters and a length of 16 meters. The flow control valve controls the coating thickness of the polymer composite PTC powder to be 2.5 μm, which is cooled and crystallized by the cooling device, and then enters the winding device to complete the d...

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Abstract

The invention discloses a method for preparing flexible double-sided aluminum foil by spraying polymer composite positive temperature coefficient (PTC) powder through a powder spraying device. The method comprises the steps of (1) preparing the polymer composite PTC powder; (2) heating the aluminum foil to 160-450 DEG C by a heating device, and spraying the polymer composite PTC powder obtained in the step (1) onto the aluminum foil through the powder spraying device to form 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), and carrying out a recrystallization technology to obtain the flexible double-sided aluminum foil. Compared with the prior art, the method is simple and convenient in processing process, improves the production efficiency and the yield, and is high in product thickness consistency; the prepared flexible double-sided PTC aluminum foil is high in quality reliability, rapid in speed of thermosensitive reaction, accurate and convenient in capacity adjustment.

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 spraying polymer composite PTC powder with a powder spreading device. Background technique [0002] With the rapid development of science and technology, the demand for functional aluminum foil 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 the role of supporting and interconnecting components in functional energy and electronic products. It is known as the "neural network" for signal and power transmission and communication of electronic products. As the basic material of the electronics industry, aluminum foil has been following the development of PCB technology, and PCB technology has been continuously improving with the rapid development of elec...

Claims

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Application Information

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IPC IPC(8): C23C24/08
Inventor 张迎晨
Owner ZHONGYUAN ENGINEERING COLLEGE
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