A special filler for high wear-resistant capacitor film and its preparation method

Abstract

The invention provides special filler for a high-wear-resistant capacitor film. The special filler is prepared from the following raw materials in parts by weight: 6-8 parts of antimony trioxide, 5-7 parts of magnesium hydroxide, 5-7 parts of aluminum hydroxide, 7-10 parts of hard loess, 4-7 parts of high bauxite, 1-2 parts of polyacrylamide, 0.2-0.3 part of dibutyltin dilaurate, 3-5 parts of white carbon black, 2-3 parts of fluorapatite, 40-45 parts of loess, a proper amount of 4-6% hydrochloric acid, a proper amount of water and 15-20 parts of adjuvant. According to the invention, due to the addition of hard loess, high bauxite, white carbon black and fluorapatite, the wear resistance, toughness and impact strength of a polypropylene film can be greatly improved; due to the addition of antimony trioxide, magnesium hydroxide and aluminum hydroxide, the flame retardance of the filler is extremely good; due to the addition of loess, the cost is reduced; due to the addition of adjuvant, the dispersibility and reinforcing property of the filler can be improved, and the strength and impact toughness of the film can be improved; and the filler is suitable for the polypropylene film and capable of greatly improving the performances of the film and reducing the cost.

Description

technical field [0001] The invention belongs to the field of capacitor films, in particular to a special filler for high wear-resistant capacitor films and a preparation method thereof. Background technique [0002] Film capacitors are excellent capacitors due to their many excellent characteristics. Its main characteristics are as follows: non-polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and low dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits. Especially in the part where the signals are cross-connected, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal will not be distorted when it is transmitted. [0003] Among all plastic film capacitors, polypropylene (PP) capacitors and polystyrene (PS) capacitors have the most prominent characteristics, so in recent years, the frequency and quantity of PP ca...

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