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KN95 and N95 protective face masks-what are the difference between them?

With the spread of new coronaviruses, masks have become a necessity for our lives, especially kn95 and n95 protective face masks. It is mainly spread by droplets. Masks can block the entry of droplets from the mouth and 
nose to a certain extent, reducing the chance of infection by the virus. So masks became a scarce item during the epidemic, and wearing masks became everyone's daily posture. At present, in addition to the ordinary 
disposable medical masks, the N95 and KN95 masks with the highest roll rate are the most concerned. So, what is the difference between N95 and KN95 masks?

 KN95 protective face mask

The difference between N95 and KN95 masks:

KN95: KN95 face mask is the level specified in the Chinese standard GB2626-2006.
N95: N95 is the level specified in the American Niosh Standard 42 CFR 84.

The technical requirements and test methods of these two levels are basically the same, and the filtration efficiency can reach 95% under the corresponding standards. However, it should be noted that medical masks for medical personnel, especially for direct contact with new coronary pneumonia, is one of the N95, but not all N95 masks are medical protective masks. For personal protection, ordinary medical surgical masks and N95 masks have no significant difference in the prevention of infectious acute respiratory infections in the clinical sense.

N95 mask standard meaning:

"N" means not resistant to oil; "95" means that exposed to a specified number of special test particles, the particle concentration in the mask is more than 95% lower than the particle concentration outside the mask. The 95% value is not the average value, but the minimum value. The protection grade of N95 means that under the test conditions specified by the NIOSH standard, the filtering efficiency of the mask filter material to non-oily particulate matter (such as dust, acid mist, paint mist, microorganisms, etc.) reaches 95%.

KN95: Our national norms and standards stipulate that masks can be divided into two categories: KN and KP according to function. KN is suitable for filtering non-oily particles, and KP is suitable for filtering oily particles. The following figure is the percentage of filtration efficiency. KN95 stipulates that the filtration efficiency for non-oily particles above 0.075 microns is greater than 95%.

N95 protective face mask

KN95 masks and N95 face masks are actually the same in terms of particle filtration efficiency. However, it should be noted that medical masks for medical personnel, especially for direct contact with new coronary pneumonia, is one of the N95, but not all N95 masks are medical protective masks.