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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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.
Application Domain
Pigment treatment with organosilicon compoundsPigment physical treatment +1
Technology Topic
Thin membraneDielectric loss +8
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PUM
Property | Measurement | Unit |
The average particle size | 95.0 | nm |
Average pore size | 350.0 | nm |
The average particle size | 270.0 | nm |
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