KN95 mask

The KN95 mask with a fairly high level of protection is a 5-layer mask made of polypropylene non-woven fabric SMMMS (2 layers of S and 3 layers of M) that can filter more than 95% of fine particles. There are three materials for the nose bridge, one is PP plastic + iron wire, the other is all-plastic, and KN95 respirator face mask. the other is all-aluminum medical mask, which is mainly composed of three layers of non-woven fabric: the inner layer (hygroscopic layer) is ordinary non-woven fabric; The outer layer (water blocking layer) is a non-woven fabric with waterproof treatment, which is mainly used to insulate the liquid droplets sprayed by others; the middle filter layer (core filter layer) is made of electret-treated polypropylene melt Spray non-woven fabric, generally referred to as SMS structure (S means spunbond layer, M means meltblown layer) '.