Do you know the national standards for N95 masks? Since 2013, the new term haze has caught people's attention. To deal with smog, for individuals, anti-haze masks are essential. There are many kinds of smog masks. Which one is better to prevent dust and smog? Professionals from all walks of life, including doctors, are advising the public that N95-certified masks should be worn on haze days. So, are N95 masks really reliable?
N95 mask national standard 1.N95 mask is one of the nine standards formulated by NIOSH in 1995. "N" means "Not resistaNt to oil". "95" indicates that the particle concentration in the mask is 95% lower than that of the particles outside the mask when exposed to the specified number of special test particles. The value of 95% is not the average value, but the minimum value, so the average value of actual products is mostly set above 99%.
N95 mask national standards 2. Other NIOSH certified anti-particulate mask levels also include: N99, N100, R95, R99, R100, P95, P99, P100, these protection levels can cover the protection range of N95, where "R" means , Suitable for oily or non-oily particles, if used for the protection of oily particles, the use time does not exceed 8 hours; "P" means, suitable for oily or non-oily particles, if used for oily particles, the use time should follow the manufacturer's recommendations . And "99" and "100" refer to the filtration efficiency levels, respectively.
National standard for N95 masks 3. It is divided into "N", "R" and "P" according to oil resistance, and it is divided into "95", "99" and "100" according to the capture rate. "R" means "resistaNt to oil", "P" means "oil proof", "99" in the capture rate means more than 99%, and "100" means more than 99.7%.
National standard for N95 masks 4. In addition, when the N100, P100, and R100 three-type masks are tested with 0.3 micron particles, the barrier efficiency must be above 99.7%. Both R95 and R95 have a filtration rate above 95%.
