A method for improving breakdown field strength of polypropylene film based on benzil

A polypropylene film and breakdown field strength technology, applied in the parts of fixed capacitors, fixed capacitor dielectrics, etc., can solve the problem of destroying the insulation properties of polypropylene

Active Publication Date: 2021-07-06
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to ensure the uniform dispersion of nanoparticles in materials has always been a difficult problem that cannot be effectively solved
Agglomeration of nanoparticles in the material can severely damage polypropylene's insulating properties

Method used

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  • A method for improving breakdown field strength of polypropylene film based on benzil
  • A method for improving breakdown field strength of polypropylene film based on benzil
  • A method for improving breakdown field strength of polypropylene film based on benzil

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The method for improving the breakdown field strength of polypropylene film based on benzil comprises the following steps:

[0019] 1. Combine dry polypropylene particles with benzil (see the chemical formula figure 1 ) according to the mass ratio of 99.5:0.5 was fully mixed in the internal mixer for 10 minutes, the temperature was 180°C, and the rotational speed of the internal mixer was 30r / min to obtain a polypropylene composite material.

[0020] 2. Set up a control group, melt and mix dry polypropylene granules in an internal mixer for 10 minutes at a temperature of 180° C., and a rotational speed of the internal mixer at 30 r / min to obtain a polypropylene material.

[0021] 3. Weigh 5 grams of polypropylene composite material and place it in a flat vulcanizing machine, preheat it at 180°C for 10 minutes to fully melt the polypropylene composite material; ...

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Abstract

The invention discloses a method for improving the breakdown field strength of polypropylene films based on benzil, comprising the following steps: (1) adding dried polypropylene particles to benzil in an internal mixer according to the mass ratio of 99.5:0.5 Mix well to obtain a polypropylene composite material; meanwhile, set a control group, that is, a polypropylene material without benzil. (2) Press the polypropylene composite material into a sample with a side length of 90×90 mm and a thickness of 80 μm with a flat vulcanizer. (3) Vacuum dry the sample for 24 hours to fully remove impurities in the sample. (4) Use the ball plate electrode to conduct a DC breakdown test on the sample; (5) Repeat steps (2)-(4) for the polypropylene material sample of the control group. Experiments show that this method can effectively improve the breakdown field strength of polypropylene films.

Description

technical field [0001] The invention relates to a method for increasing the breakdown field strength of a capacitor dielectric olefin film, in particular to a method for improving the breakdown field strength of a polypropylene film based on benzil. Background technique [0002] DC capacitors play an irreplaceable role in today's power systems, and are developing towards light weight and miniaturization. The progress of dielectric materials is the key to its development. The solid dielectric material of power capacitors is basically polypropylene film. Due to the existence of "electrical weakness" such as impurities introduced in the production process of polypropylene film, the breakdown field strength of polypropylene film decreases. Dielectric breakdown under DC voltage is an important factor causing DC capacitor failure. Therefore, it is of great significance to study the method of reducing the impact of "electrical weakness" on the breakdown field strength of polypropy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/04C08J5/18H01G4/18
CPCC08J5/18C08J2323/12C08K5/04H01G4/18C08L23/12
Inventor 杜伯学许然然李进侯兆豪韩晨磊王明洋
Owner TIANJIN UNIV
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