Special filler for high-strength anti-aging capacitor thin films and preparation method thereof

Abstract

The invention relates to special filler for high-strength anti-aging capacitor thin films. The special filler is prepared from the following materials in parts by weight: 5-7 parts of carbon black, 3-5 parts of calcium carbonate, 1-1.5 parts of dioctyl sebacate, 1-2 parts of lithium carbide, 4-5 parts of lithium-based bentonite, 3-4 parts of calcined kaolin, 4-6 parts of butadiene rubber, 0.7-1.2 parts of sulfur, 1.5-1.8 parts of cyanuric zinc, 3-5 parts of nanometer titanium, 7-9 parts of zinc oxide, 50-55 parts of clay, a proper amount of 4-6% hydrochloric acid, a proper amount of water and 15-20 parts of aid. The special filler disclosed by the invention has the advantages that the tearing strength and impact strength of polypropylene thin films can be greatly increased; the light aging resistance of the thin films is increased by virtue of adding the nanometer titanium and the carbon black; the cost is reduced by virtue of using the clay; by virtue of using the aid, the dispersity and reinforcing performance of the special filler can be increased, the strength and impact toughness of the thin films can be increased.

Description

technical field [0001] The invention belongs to the field of capacitor films, in particular to a special filler for high-strength anti-aging 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 ...

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