KN95 mask: Comply with China's GB 2626 mandatory standard, non-oily particulate matter filtration efficiency ≥95%.

Some researchers have done related research on the protection efficiency and wearing time of N95 medical protective masks. The results show that the filtration efficiency of N95 masks remains above 95% when worn for 2 days, and the respiratory resistance does not change much; the filtration efficiency decreases to 94.7 after wearing for 3 days. %.

However, the mask should be replaced in time when the following situations occur:

1. When the respiratory impedance increases significantly;

2. When the mask is broken or damaged;

3. When the mask and face cannot be closely attached;

4. The mask is contaminated (for example, when it is stained with foreign objects such as blood stains or droplets);

5. It has been used in individual wards or in contact with patients (because the mask has been contaminated);

6. If it is a mask containing activated carbon, there is a peculiar smell in the mask.

In addition, there are several points to pay attention to when wearing a mask:

1. Wash your hands before wearing the mask, or avoid touching the inner side of the mask during the process of wearing the mask to reduce the possibility of the mask being contaminated.

2. Distinguish the inside, outside, top and bottom of the mask. The light-colored side is the inside. It should be close to the nose and mouth, with the dark side facing out; one end of the metal strip is above the mask.

3. Never use your hands to squeeze masks, including N95 masks, which can only isolate the virus on the surface of the mask. If you squeeze the mask with your hands, the virus will soak through the mask with droplets, and there is still a chance of infection.

4. Make sure that the mask is in good contact with the face as much as possible. The simple test method is: After putting on the mask, exhale forcefully so that the air cannot leak from the edge of the mask.

The last point is that posture is very important, otherwise it will be worn for nothing.

The epidemic is still going on, everyone should do a good job of personal protection, please feel free to contact us if you need it: disposable mask manufacturer.