The charging voltage has a greater influence on the filtration efficiency of polypropylene meltblown nonwoven materials(Meltblown Nonwovens Factory). The higher the charging voltage, the stronger the electric field strength formed, and the surface potential of the PP fiber is higher and more stable; but the excessively high voltage causes the material to be broken down, and the surface static charge is reduced instead.

According to available data, as the charging voltage increases, the filtration efficiency of 20g/m² melt-blown nonwoven fabric increases from 26.5% before electret treatment to 79.5% after treatment, and the filtration efficiency of 40g/m² melt-blown nonwoven fabric(Polypropylene Meltblown Fabrics Company) Increased from 51.8% before electret treatment to 95.62% after treatment.

thickness:

The greater the thickness, the more potential traps formed on the surface and inside of the fiber, which will capture more charge

Electret materials:

The electret material is made of a dielectric material capable of storing charge for a long time, and other auxiliary materials, and is manufactured by a special process. It can assist to increase the density and depth of charges generated in the charge trapping electret treatment in the melt-blown non-woven fabric, so as to improve the comprehensive filtration efficiency and resistance to thermal decay of the melt-blown non-woven fabric(PP Meltblown Fabrıcs Supplier).

It is worth noting that the permeability of polypropylene melt-blown nonwoven fabrics is influenced by the conditions such as the material pore size and porosity. The electret treatment does not affect the three-dimensional structure of the nonwoven fabrics. Therefore, the electret treatment does not affect breathability.