KN95 mask KN95 is a Chinese standard mask KN95 mask is a type of mask with particle filtering efficiency in our country KN95 mask and N95 mask are actually the same in terms of particle filtration efficiency KN95 is a Chinese standard mask From Chinese national standard GB 2626-2019 "Respiratory protective equipment self-priming filter anti-particulate respirator" (1) Standard source This standard is a mandatory national standard in China, proposed by the State Administration of Work Safety, and under the jurisdiction of the National Standardization Technical Committee for Personal Protective Equipment (SAC/TC 112). (2) Technical content From the perspective of the scope of application, this standard applies to ordinary self-priming filter respiratory protective equipment for the protection of various particulate matter, typically such as masks, and other special environments (such as hypoxic environment, underwater operation, etc.) are not applicable From the perspective of the definition of particulate matter, this standard defines various forms of particulate matter, including dust, smoke, fog, and microorganisms, but does not define the size of particulate matter. From the perspective of filter element level, it can be divided into KN for filtering non-oily particulate matter and KP for filtering oily and non-oily particulate matter, and this is marked as N, R/P specified in the CFR 42-84-1995 interpretation guide similar. From the point of view of filtration efficiency, this standard is similar to the N series masks specified in the CFR 42-84-1995 interpretation guidelines 3) Matters needing attention It is worth noting that GB 2626-2006 "Respiratory Protective Equipment Self-priming Filtered Particle Respirator" will soon become obsolete, replacing its new standard GB 2626-2019 "Respiratory Protection Self-priming Filtered Particle Respirator", which has been approved by the country The General Administration of Market Supervision and Administration issued the "Announcement of the People's Republic of China 2019 No. 17 National Standards" to the whole society on December 31, 2019, and will be formally implemented on July 1, 2020. The new standards were proposed and incorporated by the Ministry of Emergency Management. Focus.