It is formed by ultrafine polypropylene fibers that are thermally bonded and entangled with each other to form a three-dimensional micro-porous structure with a random spatial arrangement.

The antibacterial and antiviral HEPA melt-blown can effectively intercept 0.3 μm particles and quickly inhibit the reproduction of bacteria and viruses.

The melt-blown medium of HEPA filters has a three-dimensional mesh fiber structure, good uniformity, and charge stability. It is used in air purifiers with high CADR and CCM values.