1, different protection levels
The protection level of mask KN90 is lower than KN95.
2. Different filtering effects.
KN90 indicates that the filtration efficiency of 0.3 micron non-oil particles is more than 90%, and KN95 indicates that the filtration efficiency of 0.3 micron non-oil particles is more than 95%.
3. Different usage scenarios
KN90 is mainly used in industries that produce oily and non-oily particulate pollutants such as dust and smoke with a diameter of more than 0. 1.85 micron, such as nonferrous metal processing, metallurgy, steel, coking, gas, organic chemical industry, food processing, construction, decoration, petrochemical industry, asphalt and so on.
KN95 respirator can be used for respiratory protection of some particles, such as dust generated in the process of grinding, cleaning and treating minerals, flour and some other materials, and also suitable for spraying liquid or non-oily particles that do not produce harmful volatile gases.
It can effectively filter and purify the inhaled abnormal odor (except toxic gas) and help reduce the exposure level of some inhalable microbial particles (such as mold, anthrax, tuberculosis, etc.). ), but it cannot eliminate the risk of contact infection, disease or death.
Extended data
Mask classification
I. Classification by performance
Dust masks are divided into KN and KP according to their performance. KN is only suitable for filtering non-oily particles, while KP is suitable for filtering oily particles.
Second, according to the protection level classification
1, KN series:
KN 100: the filtration efficiency of non-oily particles above 0.075 micron is greater than 99.97%;
KN95: The filtration efficiency of non-oily particles with a diameter greater than 0.075 micron is greater than 95%;
KN90: For non-oily particles above 0.075 micron, the filtration efficiency is more than 90%.
2.KP series:
KP 100: The filtration efficiency of oily particles above 0. 185 micron is greater than 99.97%;
KP95: The filtration efficiency of oily particles above 0. 1.85 micron is more than 95%;
KP90: The filtration efficiency of oily particles above 0. 185 micron is more than 90%.
Baidu Encyclopedia -—KN90 Mask
Baidu Encyclopedia -—N95 Mask