Polyester material used for capacitor thin film

Abstract

The invention discloses a polyester material used for capacitor thin films. The polyester material is prepared from following components, by weight: 100-120 parts of polyester, 20-30 parts of polyimide, 20-30 parts of polytetrafluoroethylene, 1-4 parts of aluminum hydroxide, 5-10 parts of liquid paraffin, 2-8 parts of titanium dioxide, 2-8 parts of glass fibers, 1-4 parts of activated carbon, 0.5-1.8 parts of dibutyl phthalate, 2-6 parts of modified starch and 3-8 parts of a heat-insulating additive. The components of the polyester material used for capacitor thin films achieves a cooperative effect, with the polyester as the main raw material with assistance of the polyimide, the polytetrafluoroethylene, the aluminum hydroxide, the liquid paraffin, the titanium dioxide, the glass fibers, the activated carbon, the dibutyl phthalate, the modified starch and the heat-insulating additive, advantages of the polyester are fully achieved and the polyester material is increased in high-temperature resistance and is prolonged in service life.

Description

Technical field: [0001] The invention relates to a polyester material for capacitor films, belonging to the technical field of electronic components. Background technique: [0002] Film capacitors use metal foil as an electrode, which is stacked with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and wound into a cylindrical capacitor; in all Among the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant. Capacitors made of polypropylene films have low thermal shrinkage, stable performance, high temperature resistance, high pressure resistance, and prevent breakdown. And other significant advantages, making the use of capacitors made of polypropylene film more and more widely. 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...

AI Technical Summary

Problems solved by technology

[0003] When the film capacitor is used under high-frequency or high-pulse conditions, the pulse current passing through the capacitor will cause the capacitor itself to heat up and the temperature will rise, resulting in problems such as increased self-healing points, reduced withstand voltage, and shortened life.