As a Face Mask KN95 Wholesale, share with you.
1. The transmission of the new coronavirus requires a host medium. Once it leaves the body of the host (such as animals and humans), it will die within a short time, but the virus can be transmitted through contact (such as hand pollution), droplet transmission, etc., where coughing, Speech, droplets generated when sneezing is the main carrier of transmission. If a new coronavirus carrier sneezes in a confined space (such as a train or airplane), the flying droplets are easily inhaled by another person and may be infected. Therefore, it is necessary to wear a mask for protection.
2. 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 KN95 mask filtering mechanism is to filter these fine particles through high-performance filter materials in the mask. In the efficiency test method, particles with an aerodynamic diameter of 0.3 microns are used uniformly. This size is the most difficult to filter out of the particles with a known normal distribution. At the same time, KN95 masks have strict requirements for their tightness. Therefore, wearing a KN95 mask correctly can reduce the exposure level of pathogenic microorganisms in the air and effectively prevent viruses from entering the human body from the respiratory tract. But the wearer should also pay attention to the prevention of hands, eyes, etc., so as not to be infected through other channels.
How often does the KN95 level mask change?
Under normal circumstances, if it is used outdoors, such as subways, buses, supermarkets, shopping malls and other public places, KN95 level masks need to be replaced every 4-6 hours, but if it is in the new pneumonia virus epidemic area, it is recommended to be timely in 2 hours Replace KN95 Mask once.