What is the implementation standard of medical kn95 mask?

KN95 is a standard mask in China, which comes from the Chinese national standard GB2626-20 19 "Breathing Protective Equipment Self-priming Particulate Filter Respirator".

This standard is a mandatory national standard in China, proposed by state administration of work safety and managed by the National Technical Committee for Standardization of Personal Protective Equipment (SAC/TC 1 12). GB2626-2006 also has general requirements, such as visual inspection, leakage, respiratory resistance, exhalation valve, dead space, visual field, headband, connecting and connecting parts, lenses, air tightness, flammability, cleaning and disinfection, information provided by manufacturers, packaging and other technical requirements.

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 the mask is not damaged and the surface of the mask is not polluted. For example, the user only wore a mask for one or two hours, and the inside of the mask was not polluted, and there was no contact with infected people or suspected infected people. The mask can be used for two or three days, but it cannot be used continuously for more than ten days.