The filtration efficiency of melt-blown fabric is key as it provides the core function for protection from PM 2.5 particles, dust, pollen, and other airborne contaminants. We now talk about the electret filters process for improving the filtration efficiency, because we can see that the superior melt-blown filter cloth with high filtration efficiency and low air resistance is still in demand.

Above all, we shall learn how melt-blown fabric filter air contaminants.

It combines two types of physical blocking and electrostatic adsorption. From the melt blown fabric process, you could see that the melt-blown fabric consists of a random array of discontinuous subdenier fibers, it’s easier to block particles with size above 1μm while difficult for less than 1μm. That’s why electret filters process is required for high filtration efficiency.

Regarding the electret filters process for melt-blown fabric filtration efficiency improvement; there are many factors, such as the equipment specification, the charge enhancer and production environment. For example, superior equipment make it easy to meet the PFE 99+; the suitable charge enhancer added can significantly improve filtration efficiency without increasing pressure drop, finally good for effective air contaminants capture; and nice production and storage environment would help on long-term maintenance of the electrical charges on electret filters.

All of improvement on what mentioned could help the production of melt-blown fabric with a fluffy structure, high porosity and satisfactory filtration stability.