Special filler for high-dispersity capacitor film and preparation method of special filler

Abstract

The invention discloses special filler for a high-dispersity capacitor film. The special filler is prepared from the following raw materials in parts by weight: 2-3 parts of dimolybdenum pentaboride, 2-4 parts of hafnium diboride, 2-2.5 parts of gas-phase aluminum oxide, 2-3 parts of polyisobutene, 1-2 parts of polystyrene microsphere, 0.3-0.4 part of sodium oleate, 0.5-0.8 part of chlorinated paraffin, 2-3 parts of lithium bis(trifluoromethanesulfonyl)imide, 2-2.4 parts of sulfonamide, 60-65 parts of municipal sludge, a proper amount of 5%-7% hydrochloric acid, a proper amount of water and 15-20 parts of an assistant. According to the filler, gas-phase aluminum oxide is added, so that the dispersity and flowability of the filler are improved, and the film is uniform, smooth, high in strength and toughness, good in dielectricity and high in finished capacitor rate; due to the municipal sludge, the cost is reduced, the fineness is high, and the reinforcement performance is good; due to the assistant, the dispersity and reinforcement performance of the filler and the strength and impact toughness resistance of the film can be improved.

Description

technical field [0001] The invention belongs to the field of capacitor films, in particular to a special filler for capacitor films with high dispersion 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 of PP c...

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