Breakdown-resistant and small-size isotatic polypropylene capacitor metalized film and preparation method thereof

Abstract

The invention discloses a breakdown-resistant and small-size isotatic polypropylene capacitor metalized film which is characterized by being prepared from the following raw materials in parts by weight: 200 parts of isotatic polypropylene, 12-14 parts of high-density polyethylene, 2-3 parts of talcum powder, 4-6 parts of turpentine, 2-3 parts of isoamyl butyrate, 1-2 parts of sodium allysulfonate, 1-2 parts of nano-clay, 1-2 parts of stearic acid, 3-4 parts of glycerol triacetate and 5-6 parts of auxiliaries. The breakdown-resistant and small-size isotatic polypropylene capacitor metalized film is simple in processing technology; and a film capacitor prepared from the breakdown-resistant and small-size isotatic polypropylene capacitor metalized film is low in contact resistance, so that the product feature is good, the prepared capacitor is relatively small in size and also has relatively good high-temperature stability; impurities in raw materials are removed through filtering, so that the performances of the raw materials are good, the scrap rate of the film is reduced, and the film is not easy to fracture; and the film is subjected to corona treatment, so that the compression strength of the film is improved, the film is prevented from being broken down, and the service life of the film is prolonged.

Description

technical field [0001] The invention relates to the field of capacitor manufacturing, in particular to a metallized film of an isotactic polypropylene capacitor with small breakdown resistance and a preparation method thereof. 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 existing polypropylene capacitor film has a relatively large shrinkage rate and poor temperature resistance. As the working time of the capacitor wound by this film increases, the internal temperature rises rapidly, resulting in a sharp decline in the stability of the capacitor. It even causes the capac...

AI Technical Summary

Problems solved by technology

[0003] The existing polypropylene capacitor film has a relatively large shrinkage rate and poor temperature resistance. As the working time of the capacitor wound by this film increases, the internal temperature rises rapidly, resulting in a sharp decline in the stability of the capacitor. It may even cause the capacitor to fail, bringing serious safety hazards to the electrical machine or the power grid