Special filler for ultraviolet-resistant capacitor films and preparation method thereof

Abstract

The invention relates to a special filler for ultraviolet-resistant capacitor films, which is prepared from the following raw materials in parts by weight: 4-6 parts of calcium hydroxide, 3-5 parts of magnesium oxide, 0.4-0.7 part of palm wax, 1-2 parts of aluminum dihydrogen phosphate, 0.1-0.2 part of sodium dodecyl benzene sulfonate, 0.2-0.4 part of stearic acid, 6-8 parts of titanium dioxide, 2-3 parts of silicon dioxide, 0.3-0.4 part of aluminum isopropoxide, 60-65 parts of clay, a right amount of 4-6% hydrochloric acid, a right amount of water and 15-20 parts of assistant. The titanium dioxide and silicon dioxide added to the filler can enhance the ultraviolet resistance of the film, so that the filler has favorable reinforcing action and can greatly enhance the light aging resistance, tearing strength and impact strength of the polypropylene film; by using the clay, the cost is lowered; and the assistant can enhance the dispersity and reinforcing performance of the filler and also enhance the strength and impact resistance of the film.

Description

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

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