Civilian disposable mask is generally made of non woven fabric, melt blown fabric, nose clip. It is mainly used for civilian people daily wearings. The standard medical surgical mask is divided
into three layers:
1.The outer layer :Blocking water, it can prevent the droplets from entering the mask
2.The middle layer:Filtering, it can block more than 90% 5 μ m particles
3.The inner layer: It is near the mouth and nose is used for moisture absorption.