KN95 is a kind of mask with particle filtering efficiency in our country. KN95 respirator and N95 respirator In terms of particle filtration efficiency, BuzzFeed reported that the Centers for Disease Control (CDC) stated that the effectiveness of KN95 respirator is the same as that of N95, and it is one of the “suitable alternatives.” According to 3M, the world’s largest mask manufacturer, KN95 and N95 masks are “equivalent” and “it can be expected that their functions are very similar.”
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 Protective Self-priming Filtered Particle Respirator”, which has been approved by the country The General Administration of Market Supervision and Administration issued the National Standards Announcement No. 17 of 2019 of the People’s Republic of China 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.
The N95 mask is one of the nine particulate protective masks certified by NIOSH. “N” means not resistant to oil. “95″ means that when exposed to a specified number of special test particles, the particle concentration inside the mask is more than 95% lower than the particle concentration outside the mask. Among them, the value of 95% is not the average value, but the minimum value. N95 is not a specific product name. As long as the product meets the N95 standard and passes the NIOSH review, it can be called “N95 mask”. The protection level of N95 means that under the testing conditions specified in the NIOSH standard, the filtering efficiency of the mask filter material to non-oily particles (such as dust, acid mist, paint mist, microorganisms, etc.) reaches 95%.
At present, the text of the new standard has been published and made public to the whole society free of charge as a mandatory standard. The new standard supplemented seven terms such as “aerodynamic particle size”, revised some technical requirements and testing methods, but did not modify the classification, marking, and filtration efficiency listed in this article.
N95 is an American standard
The N95 mask is one of the nine particulate protective masks certified by NIOSH (National Institute for Occupational Safety and Health). N95 is not a specific product name. As long as it meets the N95 standard and passes the NIOSH review, it can be called an N95 mask, which can filter particles with an aerodynamic diameter of 0.075 µm ± 0.020 µm and achieve a filtration efficiency of more than 95%.
Post time: Jun-02-2021