Method for preparing double-sided flexible copper foil by sprinkling polymer composite PTC powder through powder sprinkling device

A powder spreading device and polymer technology, applied in the field of double-sided flexible copper 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 consistent product thickness Strong, accurate and convenient effect

Inactive Publication Date: 2014-05-14
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 copper foil.

Method used

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  • Method for preparing double-sided flexible copper foil by sprinkling polymer composite PTC powder through powder sprinkling device
  • Method for preparing double-sided flexible copper foil by sprinkling polymer composite PTC powder through powder sprinkling device

Examples

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Embodiment 1

[0022] like figure 1 and figure 2 As shown, the method for preparing double-sided flexible copper foil by spraying polymer composite PTC powder with the powder spreading device in this example includes the following steps: (1) Take 140g polyethylene and 140g carbon black and put them into the three-screw blending reaction In the container, crush the blended particles with a ball mill and mix them for 5 hours to obtain a polymer composite PTC powder; The electrolytic copper 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 meters per minute for 600 meters, and the powder is passed through the flow control valve provided on the powder spreading device. 4 Control the coating thickness of the polymer composite PTC powder to be 2.5 μm, cool and crystallize through the cooling device 5, and then enter the winding device 6 to complete the double-sided spraying of the polymer com...

Embodiment 2

[0024] The method for preparing double-sided flexible copper 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 blended particles were pulverized with a ball mill and mixed for 4 hours to obtain a polymer composite PTC powder; (2) The electrolytic copper foil with a thickness of 3 μm was discharged through the unwinding device, and the discharged electrolytic copper foil was heated to 220°C, 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 through the flow control valve installed on the powder spreading device The coating thickness is 1 μm, cooled and crystallized by the cooling device, and then enters the winding device to complete the double-sided spraying of th...

Embodiment 3

[0026] The method for preparing double-sided flexible copper foil by spraying polymer composite PTC powder with the powder spreading device in this embodiment includes the following steps: (1) Take 140g of polyimide and 140g of barium titanate with a lead content of 1.4% by mass Micropowder, put 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) Pass the electrolytic copper foil with a thickness of 15 μm through the unwinding device Release, the discharged electrolytic copper foil is heated to 280°C by a heating device, on a powder spreading device with a width of 1.3 meters and a length of 16 meters, it is continuously coated at a speed of 50 meters per minute for 800 meters, and passed through the powder spreading device. The equipped flow control valve controls the coating thickness of the polymer composite PTC powder to 2.5 μm, which is cooled and crystallized by the cooling de...

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Abstract

The invention discloses a method for preparing double-sided flexible copper foil by sprinkling polymer composite PTC powder through a powder sprinkling device. The method includes the following steps of firstly, preparing the polymer composite PTC powder; secondly, heating copper foil through a heating device till the temperature reaches 160 DEG C to 450 DEG C, sprinkling the polymer composite PTC powder prepared in the first step on the copper foil through the powder sprinkling device, and forming a polymer composite PTC powder coating on the copper foil; thirdly, baking the copper foil where the polymer composite PTC powder coating is sprinkled in the second step, and obtaining the double-sided flexible copper foil through the recrystallization process. Compared with the prior art, the method has the advantages that the machining process is easy and convenient, the production efficiency and the yield rate can be improved, the thickness consistency of products is high, the prepared double-sided flexible PTC copper foil is high in quality and reliability, high in sensitive reaction speed and accurate in thermal sensitive reaction, and capacity adjustment is convenient.

Description

technical field [0001] The invention relates to a method for preparing double-sided flexible copper foil, in particular to a method for preparing double-sided flexible copper 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 copper foil in various industries, especially composite materials, electronic materials, and decorative materials, is increasing day by day. Functional copper 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, copper foil has been following the development of PCB technology, and PCB technology has been continuously improving with the rapid development of ele...

Claims

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Application Information

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IPC IPC(8): B05D1/06B32B15/04B32B15/08
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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