High-moisture-resistance metallized polypropylene film capacitor and processing method thereof

A polypropylene film, high moisture resistance technology, used in film/thick film capacitors, multilayer capacitors, fixed capacitor electrodes, etc. Improved humidity resistance and reduced capacity fading

Inactive Publication Date: 2019-08-23
艾华新动力电容(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, the packaging material used for metallized polypropylene film capacitors is amine epoxy resin plus PBT plastic case. Under the high temperature and high humidity conditions of PBT plastic case, water vapor will enter the film under the action of water vapor adsorption, absorption and diffusion. After the film absorbs moisture, the coating will be corroded and the gold spray layer will be detached. The ESR of the product will increase greatly, and the capacity will decrease sharply, which will greatly shorten the life of the capacitor.

Method used

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  • High-moisture-resistance metallized polypropylene film capacitor and processing method thereof
  • High-moisture-resistance metallized polypropylene film capacitor and processing method thereof
  • High-moisture-resistance metallized polypropylene film capacitor and processing method thereof

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Embodiment 1

[0027] see Figure 1~2 , in the embodiment of the present invention, a kind of processing method of metallized polypropylene film capacitor with high moisture resistance comprises the following steps:

[0028] S1, coating, low-temperature plasma corona treatment on the surface of the polypropylene film, so that the surface of the polypropylene film can form dangling bonds, and then a metal coating is applied on the surface of the polypropylene film, and a layer of anti-oxidation oil is coated on the outside, To protect the metallized polypropylene film, it can effectively improve the moisture resistance of the metallized polypropylene film by 30%. The German Leybold Optical High Vacuum Coating Machine, model CAP-M900, is used for coating. The main process parameters are set For vacuum degree 5*10 -4 Pa, aluminum evaporation boat temperature 1100°C, zinc furnace temperature 650~700°C, shielding oil temperature 115-120°C, protective oil temperature 140°C, main drum temperature ...

Embodiment 2

[0036] see image 3 , the embodiment of the present invention also proposes a metallized polypropylene film capacitor with high moisture resistance, comprising a wire 1 and a core 6, the surface of the core 6 is provided with a gold-sprayed layer 3, and the core 6 is covered with aluminum foil Adhesive tape 5, core 6 is encapsulated by PPS plastic shell 2, and anhydride epoxy resin 4 is potted between PPS plastic shell 2 and core 6, wire 1 is connected with core 6 and passes through PPS plastic shell 2 Compared with the existing amine epoxy resin, it is denser and thus has better moisture resistance. As mentioned in the above embodiment, the aluminum foil tape 5 can resist external moisture for the core 6, and the PPS plastic shell 2 The combination with moisture is small, so it can play a better moisture-proof effect.

[0037] After obtaining the finished metallized polypropylene film capacitor, it is subjected to a double 85 test, and the test results Figure 4 shown. It ...

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Abstract

The invention discloses a processing method of a high-moisture-resistance metallized polypropylene film capacitor, and relates to the technical field of capacitors. The method comprises the followingsteps: S1, film coating: carrying out low-temperature plasma corona treatment on the surface of a polypropylene film so that a dangling bond can be formed on the surface of the polypropylene film, andthen plating a metal coating on the surface of the polypropylene film; S2, metal spraying: performing metal spraying treatment on the core (a metal spraying material is a zinc-aluminum wire), and coating the surface of the core with an aluminum foil adhesive tape after metal spraying is completed; S3, energizing: automatically testing the core on an energizing machine; S4, welding: automaticallyfeeding the core to a welding machine through a vibrating disc, and then performing the welding operation after the distance between the welding joints is adjusted to be equal to the pin distance of the capacitor. The invention has the beneficial effects that the capacitor manufactured through the method can meet the requirements of the service life test of 85 DEG C, 85% of RH, 1-time of rated voltage and 1000 hours, and the capacity attenuation of the capacitor is smaller than 10%.

Description

technical field [0001] The invention relates to a polypropylene film capacitor, in particular to a metallized polypropylene film capacitor with high moisture resistance and a processing method thereof. Background technique [0002] Metallized polypropylene film capacitors use polypropylene film as the medium, and the metal layer is plated on the surface by vacuum evaporation. Usually the metal elements are zinc and aluminum. The metallized film is wound, sprayed with gold, welded, and shelled. , potting, curing and other processes to become capacitors. It has many advantages such as small size, good frequency characteristics, wide operating temperature range, long life, high reliability and environmental protection, and is suitable for the development trend requirements of miniaturization, high current, high temperature, high reliability and high environmental protection of complete machine products. [0003] Generally, the packaging material used for metallized polypropyle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/33H01G4/005H01G4/224H01G4/228
CPCH01G4/005H01G4/224H01G4/228H01G4/33
Inventor 谢平王亚民周小毛雷鸣李嘉雄
Owner 艾华新动力电容(苏州)有限公司
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