KN95 masks are a popular type of mask, but do you really understand the principle of KN95 masks? The following is a professional kn95 mask manufacturer to briefly introduce the raw materials of kn95 masks.

 The kn95 mask is made of non-woven fabric material and is composed of oriented or random fibers. It is generally a multi-layer structure, usually referred to as an SMS structure (2 layers of S layers and 1 layer of M layers). Currently the highest number of layers is 5 layers, namely SMMMS (2 layer S layer and 3 layer M layer). S represents the spunbond layer (Spunbond), M represents the barrier layer or the meltblown layer M (Meltblown), which is composed of polypropylene (PP). The M layer uses a melt-blown non-woven fabric as the filter layer. Because its fibers are randomly distributed and have complex three-dimensional pores, the biggest feature is that it is composed of ultrafine fibers, the specific surface area of ​​the fibers is large, and the adsorption capacity of the particles is strong; The fibers of the spray filter material are randomly distributed to form a large number of tiny pores, and the pore distribution is uniform, the filtration resistance is small, and the filtration efficiency is high, so that the filtration performance of the non-woven medical protective mask is far superior to the traditional gauze mask.

 SMS non-woven fabric uses polypropylene PP (with natural bacteriostasis and hydrophobicity) as the main raw material, and the fiber diameter can reach 0.5-10um. These ultra-fine fibers with unique capillary structure increase the number of fibers per unit area and surface area, so that Meltblown cloth has good air filterability and is a good mask material. Therefore, the laser marking surface is S-layer polypropylene non-woven fabric.