The polyester used is generally electric-grade polyethylene terephthalate (electric-grade polyester, PET), which has the characteristics of high dielectric constant, high tensile strength and good electrical properties.
Capacitor film refers to the electric-grade plastic film used as a dielectric material for film capacitors, which has special requirements for electrical characteristics, such as high dielectric strength, low loss, high temperature resistance, high crystallinity and so on. Thin film capacitors made of thin film as raw materials have the advantages of stable capacitance, low loss, excellent voltage resistance, high insulation resistance, good frequency characteristics and high reliability, and are widely used in electronics, home appliances, communications, electric power, LED lighting, new energy and other fields.
Capacitor films are mostly polypropylene and polyester as raw materials, of which polypropylene is generally electrician grade homopolymer polypropylene (high gauge homopolymer PP), with high purity, excellent heat resistance, insulation, chemical stability, impact resistance and other characteristics. The polyester used is generally electric-grade polyethylene terephthalate (electric-grade polyester, PET), which has the characteristics of high dielectric constant, high tensile strength and good electrical properties. In addition, the material of the capacitor film also includes electrician grade polystyrene, polycarbonate, polyimide, polyethylene naphthalate, polyphenylene sulfide, etc., and the amount of these materials is very small.
In recent years, with the improvement of China's scientific and technological innovation strength, more enterprises have gradually broken through the barriers to industrialization, at the same time, China's capacitor film demand continues to grow, the state has also launched a series of policies to encourage and support the industrial development of capacitor film and its application fields. Attracted by market prospects and driven by encouraging policies, existing enterprises continue to expand the production scale and lay out film production lines for capacitors, further driving the increase in China's capacitor film production capacity. According to the "Research Report on the Market Monitoring and Future development Prospects of China's Capacitor Film Industry in 2022-2026" released by Xinsijia Industry Research Center, from 2017 to 2021, the production capacity of China's capacitor film industry increased from 167,000 tons to 205,000 tons.
Post time: Mar-06-2025
