Metallized film for anti-breakdown high-performance capacitor and preparation method thereof

Abstract

The invention discloses a metallized film for anti-breakdown high-performance capacitors, which is characterized in that it is made of the following raw materials in parts by weight: isotactic polypropylene 200, antioxidant 1010? 1-2, aluminum magnesium carbonate 2- 3. Propylene glycol 3-4, ethoxylated aliphatic alkylamine 1-2, polydimethylsiloxane 2-3, acetylsalicylic acid 1-2, nano-aluminum oxide 1-2, inositol Hexaphosphate 6-8, additives 5-6; the present invention removes impurities in the raw material by filtering, so that the raw material has good performance, reduces the scrap rate of the film, and is not easy to break; adopts corona treatment to improve the pressure resistance of the film Strength, prevent breakdown, the invention has simple processing technology, and the film capacitor made with it has small contact resistance, so that the product features are good and the service life is long.

Description

technical field [0001] The invention relates to the field of capacitor manufacturing, in particular to a metallized film for anti-breakdown high-performance capacitors 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 capacitor core is the heart of the capacitor, so the material of the capacitor manufacturing core must be resistant to high frequency, high [0004] Temperature, a polymer polypropylene film that can withstand the impact of large currents is used as the medium to ensure the long-term stable operation of the whole machine. Most...

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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