What does N95 mask mean? How often does it need to be changed?

The number of people infected with the coronavirus continues to increase. The best preventive measure is to go to less crowded places. If you must go out, wear a mask and wash your hands frequently. There are many kinds of masks. We often say that it is better to wear N95 masks. What is N95 mask? How long can I wear this kind of mask?

What does N95 mask mean? How often does it need to be changed?What does N95 mask mean?
N95 respirator is one of the nine particulate dust respirators certified by the National Institute of Occupational Safety and Health in the United States. It has a particularly strong protective effect. It means that fine dust larger than 0.3 microns, including PM2.5, as well as small dust, bacteria, and viruses, can be filtered out.

It means that compared with the inside of the mask, dust and viruses larger than 0.3 microns on the outside of the mask cannot pass through the mask, and the filtering effect is more than 95%.

What does N95 mask mean? How often does it need to be changed?
What is the difference between N90 and N95 masks?
Masks N90 and N95 are the protection levels in the national mask standard. Different levels of protection represent the protection and filtering capabilities of masks, which are the ability to block dust, bacteria, and viruses.

The filtering capacity of N90 is worse than that of N95. This kind of mask of N90 can block 90% of the dust from the outside of the mask.

N95 is more resistant and may resist more than 95% of dust, bacteria, and viruses.

So the difference between N90 and N95 lies in the ability to block dust. If you need stronger protection, you need to choose a higher-level mask.

There is no fixed replacement time for N95 masks, because they are used in different environments, the time used by each person, etc., the dust holding capacity of N95 masks are different, and the maintenance methods of using N95 masks are different, which will affect the service life of N95 masks.

Generally speaking, if the following conditions occur, you must change the mask. For example, the mask is damaged or has been contaminated. Another situation is that after wearing the mask, you feel poor breathing, indicating that the mask’s net has been blocked. It’s a phenomenon and needs to be replaced.

In addition, remind everyone that masks cannot be reused after washing.