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The difference between N95 mask and KN95 mask

Release time: 2021-01-29

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The difference between N95 mask and KN95 mask

1. What is an N95 mask? What is the difference with KN95 mask? What other similar-level masks?

 N95 respirator refers to a respirator certified by the United States NIOSH (National Institute of Occupational Safety and Health) that has a protection efficiency of not less than 95% of non-oily particles; KN95 respirator refers to a mask that meets the Chinese national standard "GB2626-2006-Respiratory protective equipment-self-absorption Filter type anti-particulate respirator "non-oily particulate matter protection efficiency is not less than 95% of the mask.

KN95-GLT11 Face Mask

Neither N95 nor KN95 masks are the names of specific brands or products, but represent the level of protection of the masks. Among them, "N" or "KN" means that it is used to protect non-oily particles (such as viruses, bacteria, dust, etc.); "95" means that the filtration efficiency of the mask is 95% under the testing conditions specified by the standard. Whether it is the Chinese national standard or the American NIOSH test standard, in terms of product classification and filtration efficiency, the protection levels of N95 and KN95 are equivalent.

In addition, the FFP2 level masks that are equivalent to the N95 and KN95 protection levels are in line with the European EN149 standard certification, that is, the filtering efficiency of the mask is 94% under the test conditions specified by the European standard. Masks that have passed the European standard EN149 certification and reach the FFP2 level are marked with the words "EN 149:2001+A1:2009 FFP2".


KN95-KM1095 Face Mask

2. Why can I wear N95 or KN95 masks during the new coronavirus epidemic?

The spread of the new coronavirus requires a host vector. Once it leaves the body of the host (such as animals and humans), it will die in a short time, but the virus can be spread through contact (such as hand pollution), droplets, etc., including coughing, speech, The droplets produced when sneezing are the main carrier of transmission.

If a new coronavirus carrier sneezes in a confined space (such as a train or airplane, etc.), the dropped droplets are easily inhaled by another person and may be infected. Therefore, it is necessary to wear a mask for protection.

testing laboratory

Because the virus and its transmission medium (droplets) also exist in the form of particles, and the diameter of the particles is relatively small, the filtering mechanism of N95 or KN95 masks is to filter these fine particles through the high-performance filter material in the mask. The efficiency test method uniformly uses particles with an aerodynamic diameter of 0.3 microns, which is the most difficult to filter among the diameters of particles with a known normal distribution.

At the same time, KN95 or N95 masks also have strict requirements for their adhesion. Therefore, wearing N95 or KN95 masks correctly can reduce the exposure to pathogenic microorganisms in the air and effectively protect the virus from entering the human body from the respiratory tract. However, the wearer should also pay attention to the prevention of hands and eyes, so as not to be infected by other means.

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