N95 is a standard set by the U.S. institute for occupational safety and health, or NIOSH. All masks that pass this standard are called N95 masks. N95 masks are one of nine standards set by NIOSH in 1995.""N" means" not resistant to oil.N95 is the minimum level of infection protection set by NIOSH and is used by most health care providers.
The N95 mask is able to withstand 95% bacteria, viruses, dust, etc. under the standard experimental conditions stipulated by NIOSH. The filter layer of the N95 mask is made of N95 electrostatic melt-blown material, and its biggest feature is that it can prevent transmission through droplets.N95 mask plays an important role in epidemic protection, and the wearing of N95 mask by medical workers can effectively prevent the spread and spread of the disease.
The N95 mask should have a barrier of 95% or more when tested, and be tested for face tightness to ensure smooth passage of air when pressed against the edge of the face.Protective surgical masks are used in the medical and health industries, such as epidemic prevention stations, hospitals, centers for disease control and prevention
Key: the bacteria filter 95% or higher indicates a N95 protection levels ‼ N95 protection level 0.3 microns diameter refers to the oily particles protective rate of 95% or more, but some people think that is 95% or higher N95 filtering bacteria, it is wrong.