how to make a 99% filter melt-blow?
Methods to improve filtration efficiency
A. Increase the hot air flow or temperature (increase the fiber fineness, reduce the porosity, improve the catching ability, but increase the resistance);
B. Increase electrostatic voltage (current) (polarization fiber, increase electrostatic field energy of fiber, improve its adsorption capacity);
C. Add powder or other electrets to the raw material (improve the fiber's electric receiving capacity and storage time, so that the fiber can carry more charge and charge time);
D. Increase the suction at the bottom of the net (increase the density of the fiber, improve the capturing ability of the fiber). The gram weight is obvious and is not commonly used);
E. Reduce the yield appropriately (under the same process, the extrusion quantity becomes smaller, the fiber becomes thinner, and the resistance increases);
F. Increase the working temperature of die head (die tip) and other areas (melt fluidity becomes better, fiber becomes thinner);
G. Increase the ambient temperature of spinning (when the fiber becomes thin, the resistance increases significantly and other physical indexes decrease when the room temperature increases);
H. Appropriately increase the amount of powder.
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