What is the implementation standard of kn95 mask?

KN95 mask is a Chinese national standard name, KN stands for filtering non-oily particles, and 95 stands for 95% filtering efficiency of 0.3 micron particles. Therefore, according to the national standard, it is the same as the American standard n95 mask. As long as the filter efficiency reaches 95% according to GB2626-20 19, it can become a kn95 mask.

The kn95 mask can be reused, provided that the mask is scarce and does not damage the mask or pollute the surface of the mask. For example, the user only wears a mask for one or two hours, and the inside of the mask is not polluted, and there is no contact with infected people or suspected infected people. The mask can be used for two or three days, but not for more than ten days.

Also, when taking off the mask, be careful not to touch the inside of the mask, which will lose the protective effect. Wash your hands before wearing the mask and after taking off the mask. If the user feels breathing resistance after wearing the mask, and the mask can't stick to the face, it is necessary to change the mask in time.