Metallized film for ultrahigh square resistance capacitor

Abstract

The invention provides a metallized film for an ultrahigh square resistance capacitor. The metallized film is prepared from the following components in parts by weight: 25-35 parts of metallocene polyethylene, 3-5 parts of graphene, 3-5 parts of tetrapod zinc oxide whisker, 3-5 parts of silicon carbide whisker, 2-4 parts of magnesium borate whisker, 4-6 parts of low density polyethylene, 1-3 parts of hydrogen-containing polysiloxane, 3-5 parts of styrene-acrylonitrile copolymer, 1-3 parts of citric acid, 1-3 parts of polyamide, 1-3 parts of ethylene-vinyl alcohol copolymer, 1-2 parts of tung oil, 1-3 parts of rare earth oxide, 1-2 parts of magnesium carbonate, 1-3 parts of hydrophobic white carbon black, 1-3 parts of epoxy soybean oil, 1-2 parts of di-tert-butyl hydroperoxide, 1-3 parts of brassinolide and 1-3 parts of cyclohexanone. The metallized film is simple in the components, is low in cost and is nontoxic and non-corrosive; with the adoption of the metallized film, activity of a film is improved by adding active components such as the brassinolide and the rare earth oxide, and the film can be used for preparing the ultrahigh square metallized film with stable performance and long service life.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a metallized film for an ultra-high square resistance capacitor. Background technique [0002] Biaxially oriented polypropylene film for capacitors has high mechanical and electrical properties. Compared with capacitors made of ordinary films, capacitors made of polypropylene films have low thermal shrinkage, stable performance, high temperature resistance, High voltage resistance, breakdown prevention and other significant advantages make capacitors made of polypropylene film more and more widely used. [0003] The capacitor core is the heart of the capacitor, so the capacitor manufacturing core material must have high frequency resistance, high temperature resistance, and a high-molecular polypropylene film that can withstand the impact of high current as the medium, so as to ensure the long-term and stable operation of the whole machine. Most of the medium used in the prio...

AI Technical Summary

Problems solved by technology

Since the whole machine in the market is oriented towards ultra-thin and micro-miniature development, although the foil film composite material has a strong current-carrying and electric resistance capability, its disadvantage is that it is large in size and is not conducive to the use of the whole machine. Another disadvantage is that polypropylene film and aluminum foil Composite rolling and other processes are difficult to control, especially in the process of winding the core, due to the difference in hardness and toughness of the two materials, there will be gaps between the film and foil, so that the heat shrinkage of the material is not sufficient when setting the shape, resulting in a gap between the film and foil. It is easy to be broken down by electricity, and the scrap rate is high, resulting in waste of cost