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Method for improving dielectric constant of polypropylene film

A polypropylene film, high dielectric constant technology, applied in chemical instruments and methods, fibrous fillers, dyeing physical treatment, etc. problems, to achieve the effect of improving interface compatibility, increasing dielectric constant, and multi-contact area

Active Publication Date: 2020-09-01
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a method for improving the dielectric constant of polypropylene film to solve the problem of agglomeration easily occurring in the prior art when fillers with high dielectric constant are added to polypropylene films, and the fillers added in the prior art cannot Significantly improve the dielectric constant of polypropylene film, which leads to the problem of low reliability in practical applications

Method used

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  • Method for improving dielectric constant of polypropylene film
  • Method for improving dielectric constant of polypropylene film
  • Method for improving dielectric constant of polypropylene film

Examples

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Embodiment 1

[0033] In the present embodiment, a kind of method that improves the dielectric constant of polypropylene film is provided, and described method comprises the following steps:

[0034] S1 Place the high dielectric constant composite filler in a spheroidizing device that is fed into the DC arc plasma flame flow, and spheroidize under the action of surface tension to obtain an average particle size of 95-270nm and an average pore size of 350- 650nm spheroidized high dielectric constant composite filler, and the temperature in the spheroidization device is 45-200°C; the high dielectric constant composite filler includes a volume ratio of 1-4:1-2:2 -7: 1-4 ceramic particles, barium titanate, carbon nanotubes, titanium dioxide; compounding specific proportions of high dielectric constant components not only synergistically increases the dielectric constant of polypropylene films, but also ensures The mechanical properties of the polypropylene film can reduce the dielectric loss, an...

Embodiment 2

[0042] This embodiment should be understood as including all the features of the foregoing embodiments, and further optimized on the basis thereof, therefore, this embodiment provides a method for improving the dielectric constant of polypropylene film, said method comprising the following steps:

[0043] S1 Place the high dielectric constant composite filler in a spheroidizing device that is fed into the DC arc plasma flame flow, and spheroidize under the action of surface tension to obtain a spheroid with an average particle size of 95nm and an average pore size of 350nm. Composite filler with high dielectric constant;

[0044] S2 Add the spheroidized high dielectric constant composite filler to the process of preparing the polypropylene film after surface treatment and pre-dispersion treatment under the assistance of microwaves to increase the dielectric constant of the polypropylene film, and In this embodiment, the high dielectric constant composite filler includes porcel...

Embodiment 3

[0051] This embodiment should be understood as including all the features of any of the preceding embodiments, and further optimized on the basis of it, therefore, in this embodiment, a method for improving the dielectric constant of a polypropylene film is provided, and the method includes The following steps:

[0052] S1 Heat the composite filler with high dielectric constant in a spheroidizing device fed with a DC arc plasma flame, and spheroidize under the action of surface tension to obtain spheres with an average particle size of 270nm and an average pore size of 650nm A composite filler with a high dielectric constant, and the heating temperature is 200°C; the composite filler with a high dielectric constant includes porcelain particles, barium titanate, carbon nanotubes, and titanium dioxide with a volume ratio of 4:1:7:4. ;

[0053] S2 Add the spheroidized high dielectric constant composite filler to the process of preparing the polypropylene film after surface treat...

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Abstract

The invention provides a method for improving the dielectric constant of a polypropylene film. The method comprises the following steps of: putting a composite filler with a high dielectric constant into a spheroidizing device into which a direct-current arc plasma flame flow is introduced, and spheroidizing under the action of surface tension to obtain a spheroidized high-dielectric-constant composite filler with the average particle size of 95-270nm and the average pore size of 350-650nm; and carrying out surface treatment and pre-dispersion treatment on the spheroidized high-dielectric-constant composite filler under the assistance of microwaves, and adding the filler to the polypropylene film preparation process. The problem of easy agglomeration of the filler can be solved on the premise of the guaranteeing of the mechanical property of the polypropylene film, the dielectric constant of the polypropylene film can be improved, the dielectric loss is low, the breakdown field intensity is more than 430 KV / mm, and better application reliability can be obtained in the actual application.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for increasing the dielectric constant of a polypropylene film. Background technique [0002] Polymer-based composite dielectric materials have attracted the attention of researchers because of their good mechanical properties, processability and insulation properties. At present, polymer-based composite dielectric materials mainly add high-dielectric ceramic materials to the polymer body. However, the disadvantage of this method is that the dielectric constant of the composite material increases slowly with the increase of the filling amount of the ceramic material, and when the filling amount of the ceramic material is too high, it is easy to damage the mechanical properties of the composite material, and the dielectric constant of the obtained polypropylene film The electrical constant is not very high, and the addition of some nanoparticles often has high surface...

Claims

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Application Information

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IPC IPC(8): C08K9/00C08K9/06C08K9/04C08K7/24C08L23/12C08J5/18C09C1/00C09C3/04C09C3/08C09C3/12
CPCC08J5/18C08J2323/12C08K7/24C08K9/00C08K9/04C08K9/06C08K2201/003C08K2201/011C09C1/0084C09C3/006C09C3/04C09C3/048C09C3/08C09C3/12
Inventor 张晨晨丁国成杨海涛吴兴旺尹睿涵朱太云秦少瑞胡啸宇
Owner STATE GRID CORP OF CHINA
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