Metalized film for film capacitor

Abstract

The invention provides a metallized film for a film capacitor. The film comprises a base film and a metal layer, wherein the base film comprises raw materials in parts by mass, 100 parts of PP, 0.2-0.5 parts of transparent modifier, 18-25 parts of RU composite adhesive, 0.3-1.2 parts of peroxide cross-linking agent, 5-32 parts of modified hexagonal boron nitride, 30-42 parts of EOC, 0.8-2 parts offlame retardant and 0.6-1.5 parts of anti-aging agent. The invention discloses a processing method of the metallized film for the film capacitor. The processing method comprises steps of Step 1, preparing the base film; and Step 2, performing vacuum evaporation of the metal layer. The film is advantaged in that thermal conductivity, the heat-resistant grade, heat-conducting property, ultravioletresistance, weather resistance, impact resistance, tensile strength, chemical corrosion resistance, electrical insulating property and flame retardance of the base film are remarkably improved, and thereby the quality, the use temperature and the service life of the metallized film and the capacitor are improved.

Description

technical field [0001] The invention belongs to the field of capacitors, in particular to metallized films for film capacitors. Background technique [0002] Metallized film capacitors use organic plastic films as the medium, metallized films as electrodes, and capacitors made by winding. The films used in metallized film capacitors include polyethylene, polypropylene, polycarbonate, etc., except In addition to the winding type, there is also a laminated type. Metallized film capacitors have high withstand voltage, high insulation resistance, good impedance frequency characteristics, low ESR, high capacity stability, and low loss tangent. [0003] The metallized film is the heart of the capacitor, so the metallized film of the capacitor must be made of an organic plastic film with high frequency resistance, high temperature resistance, and high current impact, so as to ensure the long-term stable operation of the whole machine. Among them, polypropylene film has chemical r...

AI Technical Summary

Problems solved by technology

Among them, polypropylene film has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing performance, but it is flammable and can be decomposed under high temperature and oxidation. The high temperature performance and weather resistance are not good, and the heat resistance level needs to be improved, which seriously affects the quality, operating temperature and service life of capacitors

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