How to Choose N95 Masks
Is it true that N95 masks with breathing valves have poor protection? What is the difference between N95, R95, P95 masks? How long does the N95 mask need to be replaced? Today I will do homework for 3M N95 masks, take a look at the differences between the 3M N95 mask models and introduce the correct way to wear N95 masks.
What is N95 mask?
The N95 mask is NIOSH (National Institute for Occupational Safety and Health) standards and can filter 95% of non-oily particles with a diameter of 0.3 micrometers or more in the air. As long as the particle filter respirator meets the N95 standard and passes the NIOSH review, it can be called a N95 mask.
N95 masks in the United States are mainly industrial protective masks. They are dust masks that meet NIOSH standards. For some dusty working environments, N95 masks can prevent the inhalation of harmful airborne particles. N95 masks are also good for mountain fire smoke pollution. Protective effect. Therefore, N95 masks are generally easier to buy in hardware stores and home improvement stores. If you want to do carpentry, stir cement, etc. at home, you may also consider wearing N95 masks for protection.
What is the difference between N95, R95, P95 masks?
N95 is one of NIOSH’s ratings for particulate filter respirator protection standards. “N” means Not resistant to oil, and “95” means the filtration efficiency is 95% or above. In addition to 95, there are classifications of N99 (the filtration efficiency is not less than 99%) and N100 (the filtration efficiency is not less than 99.97%).
“R” means Somewhat resistant to oil, and “P” means Strongly resistant to oil / Oil proof. Both R95 and P95 masks can filter 95% of non-oily particles and oily particles with a diameter of 0.3 micrometers or more in the air. The service life of R95 masks is up to 8 hours in an oily particulate environment, while the service life of P95 masks can be up to 40 hours. Or 30 days. R series and P series masks also have R99 / R100 and P99 / P100 classification.
It can be seen from the above that N95 is actually the lowest of the nine grades of dust mask protection standards formulated by NIOSH.