When we cut a medical mask, we can find that the mask has three layers of non-woven fabrics, which is also required by the national standard for medical masks, otherwise it will not meet the protection requirements. To make masks, the raw material fibers are all polypropylene, and medical masks are generally referred to as SMS structure.
The spunbond layer is a single layer, and the meltblown layer is divided into single layer or multi-layer according to the filtering requirements. "Meltblown cloth" is commonly known as the "heart" of the mask. It is the filter layer in the middle of the mask. It has good filterability, shielding, heat insulation and oil absorption. It is an important raw material for the production of masks.