The KN95 masks is compsed of 5 layers of materials. The inner layer of the mask is non-woven fabric, the second and third layers are melt blown fabric, the fourth layer is hot air cotton, and the fifth layer is non-woven fabric, which is made by ultrasonic heat welding, electric welding, upper belt and other processes.
The KN95 masks is compsed of 5 layers of materials. The inner layer of the mask is non-woven fabric, the second and third layers are melt blown fabric, the fourth layer is hot air cotton, and the fifth layer is non-woven fabric, which is made by ultrasonic heat welding, electric welding, upper belt and other processes.