Most masks are mainly composed of three layers of nonwoven fabrics. The inner and outer layers are mostly spunbond nonwoven fabrics. The middle layer is electret polypropylene meltblown nonwoven fabrics or nanofiber composite materials with higher filtration performance. The key core material for the mask to achieve the barrier protection function, the outer non-woven fabric of the medical mask also has requirements for water repellency, etc.
The electret-treated polypropylene meltblown nonwoven fabric can use the coulomb force of its charged fiber to capture fine particles (virus aerosol, etc.). The mask made of it is suitable for breathing resistance and is relatively comfortable to wear. Next, greatly improve the filtration efficiency. Most of the medical protective masks, medical surgical masks, civil protective masks and industrial protective masks currently on the market use electret meltblown nonwoven fabric as their core filter material.