The quality of the protective mask is directly determined by the material
The reporter realized in the interview that the popular masks sold online today are mainly divided into two types, one is the American N standard mask, and the other is a mask with activated carbon. Some businesses have also identified the "PM2.5-proof" category in N-standard masks, which looks very tempting. So what is the basis of the protection of these hot-selling masks, is it "reliable to prevent PM2.5"?
The protective effect of the mask is directly related to the material used. Because the fundamentals of the masks are not different, the goal is to block the human respiratory tract from the outside air. Just according to the different goals, the tailoring design of the masks and the materials used are different.
The materials used by the American N standard masks are different. Some manufacturers also use polypropylene spunbond non-woven fabric as the front and back protective layer, and polypropylene ultra-fine melt-blown non-woven fabric as the middle layer. Some also use electrostatic filter cotton as an intermediate layer. These materials are relatively strong in filtering ability. During the N standard test, 0.3 micron particles are used, which is a very high standard in masks.