What are the medical masks?

Editor：Zhejiang Antipollution Medical Equipment Co., Ltd. │ Release Time：2021-09-08
Protective medical masks are generally made of folded cones, which is our common N95 mask, which needs to meet the requirements of the GB19083 national standard. The two core technical indicators are that the filtration effect of non-oily fine particles with a diameter of 0.3 microns can reach more than 95%. , The larger diameter of 2 microns of bacteria barrier must reach 100%, of course, there are also high requirements for blood penetration resistance, and its own air permeability is also required. This is usually used in severely infectious resource occasions. Qualified N95 masks are usually composed of the following structures:
1-25-35 grams of water-repellent polypropylene spunbond non-woven fabric, this layer of material is mainly used to block droplets;
2-30-40 grams of water-repellent hot air non-woven fabric, this layer is mainly used for support, so that the cone-shaped round mask will not collapse when it is tightened with the face;
3-50-60 grams of electret melt blown cloth with electret masterbatch and high voltage piezoelectric treatment. This layer is the most core part. Only after the electret treatment has a lot of charges on the melt blown cloth is the same. The charged 0.3 micron non-oily small particles have an efficient adsorption effect, usually more than 95%. This can only be tested by professional instruments. Some manufacturers also use two layers of 25-28 grams of electret treated melt Spray cloth to achieve the effect of 50-60 grams of electret melt blown cloth!
4- The hydrophilic spunbond non-woven fabric near the face, this layer mainly has a certain moisture absorption effect, avoiding too much fog!
The difference between medical surgical masks and protective masks is that the protection level of medical surgical masks is one grade lower. It is reflected in the technical indicators that the 0.3 micron non-oily particles required by medical surgical masks have a barrier effect of more than 30%. N95 and other medical The protective mask is 95%, and the 2 micron diameter bacteria barrier must be greater than 95%, which is the BFE95 standard. Therefore, this type of mask is generally used in surgery during non-epidemic periods. This type can also be made into a cone-shaped shape similar to N95. But it is usually made into the shape of a flat mask! If it is made into a flat mask, it usually consists of the following layers:
About 1-25 grams of blue or green water-repellent polypropylene spunbond cloth can block droplets!
About 2-25 grams can reach BFE99 or BFE95 or more (BFE99 refers to the bacteria barrier of 99%) electret treated melt blown cloth, the main function of this layer is to block more than 95% of bacteria and more than 30% of 0.3 micron fine particles !
3-25 grams of hydrophilic polypropylene spunbond non-woven fabric, the main function is to absorb moisture.