A special filler for flame-retardant capacitor film and preparation method thereof

Abstract

The invention provides special filler for a flame-retardant capacitor film. The special filler is prepared from the following raw materials in parts by weight: 6-9 parts of triphenyl phosphate, 0.3-0.5 part of epoxy oleic acid butyl ester, 6-8 parts of aluminum hydroxide, 2-3 parts of ammonium polyphosphate, 3-4 parts of iron ore slag, 0.4-0.6 part of vinyl ester succinate, 0.3-0.5 part of phthalic diglycol diacrylate, 0.4-0.6 part of octadecanol, 2-3 parts of melamine, 50-55 parts of clay, 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 triphenyl phosphate, ammonium polyphosphate and aluminum hydroxide, the flame retardance of the filler is good, meanwhile, the filler is fine and uniform in particle, good in reinforcing property and capable of greatly improving the tearing strength and impact strength of a polypropylene film; due to the addition of clay, the cost is reduced; and due to the adoption 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.

Description

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

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