Polypropylene composite material for capacitor films

Abstract

The invention discloses a polypropylene composite material for capacitor films. The polypropylene composite material is prepared from the following components in parts by weight: 90-120 parts of polypropylene, 30-40 parts of glass fiber, 2-7 parts of pentaerythritol, 2-7 parts of para-phthalonitrile, 5-10 parts of sodium silicate, 1-3 parts of n-hexacosanol isovalerate, 0.5-1.5 parts of isoborneol acrylate, 1-3 parts of melamine, 2-6 parts of silicon carbide, 10-12 parts of butadiene resin, 3-6 parts of nitrocellulose and 2-7 parts of assistant. The polypropylene composite material for capacitor films uses the polypropylene as the main raw material, and uses the glass fiber, pentaerythritol, para-phthalonitrile, sodium silicate, n-hexacosanol isovalerate, isoborneol acrylate, melamine, silicon carbide, butadiene resin, nitrocellulose and assistant as the auxiliary materials. The polypropylene composite material for capacitor films has the characteristics of high elastic modulus, high strength, high heat-deformation temperature and favorable dimensional stability.

Description

Technical field: [0001] The invention relates to a polypropylene composite 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 resistan...

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

And it is easy to pull the film to break, and the broken film will affect the normal production