What’s N95 Medical Face Mask?
Besides the filtration efficiency of the mask, the tightness between the mask and the face is one of the important factors to determine the effect of the mask. Different types of masks have great differences with the fitness of the human face. Therefore, before using the mask, the fitness test of the mask should be carried out first. When the user’s face is tested for tight density, make sure that the air can enter and exit through the mask when the face edge is tightly attached.
Hot-selling online N95 mask, after testing filtering effect can reach 95%. But for N95 masks, doctors warn the public :” In theory, the more airtight the mask’s protective material, the better the effect of blocking particles. On the other hand, the more airtight the mask, the more difficult to breathe, especially for patients with cardiovascular disease, wearing bad can also lead to dizziness and dyspnea due to hypoxia, choose to wear more carefully .”
The filtration efficiency of N95 mask on particles with aerodynamic diameter of 0.075µm±0.02µm is over 95%. the aerodynamics diameter of airborne bacteria and fungal spores varied mainly between 0.7-10µm and also within the protective range of N95 masks. As a result, N95 masks can be used for the respiratory protection of certain particles, such as dust produced by grinding, cleaning and treating minerals, flour and certain other materials, as well as for liquid or non-oil particles produced by spraying that do not produce harmful volatile gases. Can effectively filter and purify inhaled odors (except toxic gases), help reduce exposure to certain inhalable microbial particulates (e.g. mold, bacillus anthracis, bacillus tuberculosis, etc.), but does not eliminate the risk of exposure to sexual transmission, illness or death
The N95 mask is one of 9 types of particulate protective masks certified by NIOSH (National Institute for Occupational Safety and Health). N95 is not a specific product name, as long as it meets the N95 standard, and the product passed the NIOSH review can be called N95 mask, which can filter particles with aerodynamic diameter of 0.24 ± 0.6μm (physical diameter 0.075µm ± 0.020µm) Over 95%.
NIOSH other certified PMMA levels include :9 N95、N99、N100、R95、R99、R100、P95、P99、P100,. All of these levels can cover N95 protection. “N” indicates oil intolerance (not resistant to oil) and is suitable for non-oil particulate matter. “R” means oil resistance (resistant to oil), suitable for oily or non-oil particulate matter, if used for protection of oily particulate matter, the service time is not more than 8 hours. “P” means oil-proof (oil proof), suitable for oily or non-oil particles, if used for oily particles, the use time should follow the manufacturer’s advice. “95”,”99″ and “100” refer to the level of filtration efficiency when tested with 0.3 micron particles. “95” means filtration efficiency above 95%,”99″ means filtration efficiency above 99%,”100″ means filtration efficiency above 99.7%.
