1, 3M is the brand name of the mask.
The masks produced by 3M Company can all be called 3M masks. There are different types of masks under this brand: such as warm masks, anti-particle masks (dust masks), medical protective masks and medical surgical masks.
There are different types of masks under the 3M mask, such as 3M 9002 (headband, KN90), 3M90 1 (ear strap, KN90), 3M 9002V (headband with valve, KN90), 3M 9502(KN95) and 3M 8205 (cup type, KN95).
2.N95 is the mask certification standard.
As long as the product meets the N95 standard and passes NIOSH review, it can be called "N95 mask". N95 mask has great influence on aerodynamic diameter ≥0.3? The filtration efficiency of M particles is above 95%. The aerodynamic diameter of airborne bacterial and fungal spores is mainly 0.7- 10? M is also within the protection range of N95 mask.
Extended data:
Precautions for using N95 mask:
1, wash your hands before wearing the mask, or avoid touching the inside of the mask during wearing the mask to reduce the possibility of the mask being contaminated.
2, distinguish between inside and outside the mask, up and down.
3. Don't squeeze the mask with your hands. N95 mask can only isolate the virus on the surface of the mask. If you squeeze the mask by hand, the virus will soak the mask in the form of droplets, which is easy to cause virus infection.
4. Try to make the mask fit the face. The simple test method is: after wearing the mask, exhale forcefully, and the air cannot leak from the edge of the mask.
5. The protective mask must be close to the user's face, and the user must shave off the beard to ensure that the mask can be close to the face. Beards and anything placed between the mask gasket and the face will make the mask leak.
6. After adjusting the position of the mask according to your face, press the nose clip along the upper edge of the mask with the index finger of both hands to make it close to your face.
Baidu Encyclopedia -3M Mask
Baidu Encyclopedia -N95 Mask