Masks play an important role in the epidemic, especially kn95 masks. Do you know the difference between kn95 and N95 masks?
"Kn95 level is one of the levels specified in Chinese standard, gb2626-2006, and N95 level is one of the levels specified in American Standard and 42cfr84. The technical requirements and test methods of these two levels are basically the same, but they belong to different national standards.
N95 respirator is one of 9 kinds of anti particulate respirators certified by National Institute of occupational safety and health. N means non oily particles, which means that the filtration efficiency reaches 95% under the detection conditions specified in NIOSH standard. As long as the products meet the N95 standard and pass the NIOSH review, they can be called N95 masks, which is the American Standard and has the highest recognition in the world. Kn95 respirator is a kind of respirator with filtration efficiency for particulate matter in China, and the filtration efficiency is greater than or equal to 95%.
Kn95 masks and N95 masks are used in non-medical places to prevent all kinds of aerosol particles suspended in the air, including dust, smoke, fog and pathogenic microorganisms (such as bacteria and viruses).
Kn95 mask and N95 mask have two types, one is equipped with breathing valve, the other is not equipped with breathing valve. The mask without expiratory valve can effectively prevent the droplets discharged by the mask wearer from polluting the surrounding environment. The mask with expiratory valve does not have this function. So it's better to buy a mask without a breathing valve.
Kn95 and N95 masks can not be used in medical operations, especially in high-risk operations such as tracheotomy and endotracheal intubation.
Kn95 masks and N95 masks may not be suitable for some patients with weak body or cardiopulmonary diseases, nor for patients with respiratory diseases with dyspnea.
The key to wearing a mask is to close the face. Please check the instructions carefully before wearing.
