Special filler for wear-resistant oil-resistant capacitor films and preparation method thereof

Abstract

The invention relates to a special filler for wear-resistant oil-resistant capacitor films, which is prepared from the following raw materials in parts by weight: 3-5 parts of propylene glycol polyadipate, 2-3 parts of cerium oxide, 10-15 parts of quartz sand, 1-1.4 parts of hydrofluoric acid, 4-6 parts of kaolin, 1-2 parts of 1,3-pentadiene, 0.2-0.4 part of sorbitol anhydride laurate, 2-4 parts of zinc dibutyl dithiocarbamate, 1-1.5 parts of sodium hydroxide, 50-55 parts of municipal sludge, a right amount of 5-7% hydrochloric acid, a right amount of water and 15-20 parts of assistant. The fillers cerium oxide and quartz sand can greatly enhance the wear resistance and water resistance of the film. The added propylene glycol polyadipate can enhance the oil resistance and high temperature resistance of the film. The municipal sludge is utilized to lower the cost, so that the filler has high fineness and favorable reinforcing performance. The assistant can enhance the dispersity and reinforcing performance of the filler, and improve the strength and impact toughness of the film.

Description

technical field [0001] The invention belongs to the field of capacitor films, in particular to a special filler for anti-wear and oil-resistant capacitor films and a preparation method thereof. Background technique [0002] Film capacitors are excellent capacitors due to their many excellent properties. Its main equivalences are as follows: no polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and very small dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits. Especially in the part where the signal is cross-connected, a capacitor with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal will not be too distorted during transmission. [0003] Among all plastic film capacitors, polypropylene (PP) capacitors and polystyrene (PS) capacitors have the most significant characteristics, so in recent years, the frequency and quantity ...

AI Technical Summary

Problems solved by technology

Although simple polypropylene (PP) film has the outstanding advantages of heat resistance and corrosion resistance, and the product can be sterilized by steam, and its density is small, it is the lightest general-purpose plastic; but it has the disadvantages of poor low temperature impact resistance and easy aging

Polystyrene (PS) film has extremely high transparency, good electrical insulation performance, easy coloring, good processing fluidity, good rigidity and good chemical corrosion resistance, but relatively brittle, low impact strength, prone to stress cracking, heat resistance Poor performance and not resistant to boiling water; therefore, the film needs to be modified