Disposable medical mask structure and materials
The general medical mask is composed of 3 layers, the inner and outer layers are spunbonded nonwoven fabric, with a layer of meltblown nonwoven fabric sandwiched in between. The outer layer of non-woven fabric can prevent droplets, the inner layer of non-woven fabric can absorb moisture, and the middle layer is a filter layer, and the filter anti-bacterial effect can reach 99.99%. A part of the larger particles can be filtered out by the mechanical sieve of the filter material, just like we use a sieve to sift things, filter out the big materials. A part of the particles pass through the mesh channel of the filter material when the particles hit the fiber and are attracted by the attraction of molecules. In addition, some particles with small-scale and low-speed motion are absorbed by the fiber when doing Brownian diffusion motion. In addition, the electrostatic effect of the fiber will also attract particles. This is why medical masks have better antibacterial effect than the ordinary masks we usually wear. Returning to the structure, we can find that the main material of the medical mask is non-woven fabric.
