Recently, in order to prevent virus infection, everyone should wear masks when going out. N95 is a kind of mask with strong protection, but many people don't know about N95 masks. How often should N95 masks be changed? Under what circumstances do you need to replace the N95 mask? Only by correctly wearing and replacing N95 mask can we prevent and resist bacteria. In this article, let's learn about the replacement time and situation of N95.
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How often do I change the N95 mask?
N95 mask has a certain service life. With the increase of service time of N95 mask, the filtered particles will gradually block the filter screen and increase the respiratory resistance. Moreover, the mask is thick. If it is not picked for a long time, the internal 'humid climate' may breed bacteria. In addition, different methods of use and storage will affect the service life of the anti haze mask.
N95 respirator is one of 9 kinds of particulate dust masks certified by the National Institute of occupational safety and health. " N 'refers to particles not suitable for oiliness;' 95 'means that the filtration efficiency reaches 95%. The filtration efficiency of n99 mask reaches 99%. Experts recommend wearing N95 mask to replace it once every two days.
Taking 3M mask as the column, N95 mask is generally used for 24-48 hours; The service time of R95 mask is about 8 hours; The service time of p95 mask is much longer than that of N95 mask, and the working time can reach 40 hours or 30 days.
Under what circumstances does the N95 mask need to be replaced?
If any of the following three conditions is found, replace the N95 mask immediately:
1. N95 mask is contaminated, such as blood stains or droplets;
2. The user feels that the respiratory resistance increases;
3. N95 mask damaged.