What you care about: Comparative analysis of various mask standards
The corona virus epidemic is still relatively serious, and masks and other related materials are in short supply. So what mask types are currently on the market? What are the differences in implementation standards? Can the mask be reused? Can I make my own mask by using common things around me?
Several common mask categories
1. N95 is a concept proposed by the National Institute of Occupational Safety and Health (NIOSH) in 42 CFR Part 84 of the US Federal Regulations, including three series of N, R, and P. N series can be used to block non-oily particulate respiratory protective equipment (Including masks), and the relevant national standard system does not have the N95 statement; in addition, N series masks can be used for the protection of particulate matter, including the transmission of viruses and other pathogens, but it does not mean that all N95 masks can be used for the medical field Protection.
2. Medical protective masks-is currently the most demanding protective mask in the domestic medical field. For technical details, see GB 19083. It can be used for the protection of high-risk, high-exposure frontline medical personnel and staff;
3. KN 95-is the concept of the most popular standard GB 2626 in the domestic labor insurance field. The standard respirator (including masks) is divided into KN and KP series, KN series can block non-oily particulate matter, KP series can block oily and non-oily particulates;
4. European standard for particulate protection masks-EN 149 is divided into three levels of FFP1, FFP2, FFP3, but its test parameters (test flow rate, aerosol particle size characteristics, etc.) are different from GB 2626 and US N95; and GB 2626 provisional Incomparable, but daily use of protection during the epidemic is sufficient;
5. European and American medical mask standards-the European standard EN 14683 divides medical masks into Type Ⅰ, Type Ⅱ and Type ⅡR three levels, respectively, bacterial filtration efficiency, pressure difference, synthetic blood penetration, and microbial cleanliness. There is no requirement for particulate filtration efficiency The standard ASTM F2100 also divides medical masks into three levels: level 1-3, which evaluates bacterial filtration efficiency, pressure difference, submicron particulate filtration efficiency, synthetic blood penetration, and flame resistance; because no sample comparison has been done, It is not possible to confirm the level of the requirements of these two standards and GB 19083, but from the comparison analysis of the standard text, China's GB 19083 is not low.