Under the current CDVID-19 epidemic, the demand for masks has always been very large, many of them are sold out, and the masks in Wanjiali are out of stock. Can the KN95 masks we use to be reused?
KN95 face mask filtering principle
The KN95 mask is based on the principle of electrostatic adsorption. Each small molecule of the filter cloth is covered with a lot of high currents, and small particles will be adsorbed when passing, so as to achieve the desired filtering effect. When the internal spray material encounters the exhaled moisture, the static electricity will disappear after a period of time, and the use effect of the mask will be greatly reduced. In addition, some bacteria and viruses will be attached during the use of the mask. Repeated use is likely to cause insecurity.
Generally, KN95 standard masks can be used for 3 days without an epidemic, but the new coronavirus pneumonia epidemic is still severe. Experts recommend that we replace it every 4 hours. Many people around us take off the mask and put it in their pockets, and then wear it out later. In fact, the filtering effect and safety of the mask will be reduced. Change it if you have one.
