Flame retardant weather-resistant special filler for capacitor film and preparation method thereof

Abstract

The invention relates to flame retardant weather-resistant special filler for a capacitor film. The filler is prepared from the following raw materials in parts by weight: 5-7 parts of chlorinated polyethylene, 1-2 parts of PE wax, 5-7 parts of nano talcum powder, 2-3 parts of lithium carbonate, 6-9 parts of hard calcium carbonate, 3-5 parts of an accelerant M, 4-6 parts of zinc oxide, 2-3 parts of stearic acid, 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 auxiliary. According to the filler provided by the invention, the nano talcum powder is added, so that the filler is good in dispersibility, reinforcement property and film toughness; by adding chlorinated polyethylene and zinc oxide, the weather resistance, the ozone resistance, the chemical resistance and the aging resistance of the film are enhanced and the filler has good oil resistance, flame retardance, coloring performance and toughness; by using municipal sludge, the cost of the filler is lowered, and the filler is high in fineness and good in reinforcement property; by using the auxiliary, the dispersibility and reinforcement property of the filler can be enhanced, and the strength and the impact toughness of the film can be enhanced.

Description

technical field [0001] The invention belongs to the field of capacitor films, in particular to a special filler for flame-retardant and weather-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...

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