Wearing a kn95 mask can achieve a filtration efficiency […]
Wearing a kn95 mask can achieve a filtration efficiency of more than 95% for particles with aerodynamic diameter ≥ 0.3 µm. The aerodynamic diameter of air bacteria and fungal spores mainly varies between 0.7-10 µm, which is also within the protection range.
Therefore, this type of mask can be used for respiratory protection of certain particulate matter, such as dust generated during grinding, cleaning and processing of minerals, flour and certain other materials, and also suitable for liquid or non-oily non-oil generated by spraying. Particulate matter of harmful volatile gas.
It can effectively filter and purify inhaled abnormal odors (except toxic gases), help reduce the exposure level of certain inhalable microbial particles (such as mold, anthracis, tuberculosis, etc.), but cannot eliminate contact infection, illness or death risks of.
KN95 level is one of the levels specified in the Chinese standard GB2626-2006, and N95 is one of the levels specified in the American standard 42 CFR 84. The technical requirements, test methods, and protection levels of these two levels are basically the same, but they belong to the standards of different countries.
Scope of application:
1. The protection of medical staff and related staff against airborne respiratory infectious diseases.
2. Basic protection for medical staff or related personnel, and protection against the spread of blood, body fluids and splashes during invasive operations.
3. One-time sanitary care in ordinary environment, or barrier or protection of particles other than pathogenic microorganisms such as pollen.
Other levels of NIOSH certified anti-particulate masks also include: N95, N99, N100, R95, R99, R100, P95, P99, P100, a total of 9 types. These protection levels can cover the N95 protection range.
"N" means not resistant to oil, suitable for non-oily particles, and no time limit for use.
"R" means resistant to oil, suitable for oily or non-oily particles. If used for the protection of oily particles, the use time should not exceed 8 hours.
"P" means oil proof, suitable for oily or non-oily particles. If it is used for oily particles, the use time should follow the manufacturer's recommendations.
"95", "99" and "100" refer to the filtration efficiency level when tested with 0.3 micron particles. "95" means that the filtration efficiency is above 95%, "99" means that the filtration efficiency is above 99%, and "100" means that the filtration efficiency is above 99.7%.