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How long do kn90 and kn95 masks last?

by:Copper Plus     2021-06-05
How long do kn90 and kn95 masks last? Nowadays, protective masks are a medical equipment product that everyone pays special attention to. Protective masks can protect us from virus infections. Kn90 protective masks are a very common copper copper mask. Kn90 protective masks can prevent viruses. of. Nowadays, the protective masks of n90 are disposable under normal circumstances. They need to be replaced after wearing for 2~4 hours, and it depends on whether the inside of the protective mask is wet or cold. The time for immediate replacement is not completely fixed . It is recommended that such disposable masks should be removed and replaced on a regular basis, especially after being wet and cold, and it is recommended that you reduce your outing as much as possible, which is a more reasonable preventive measure. Can kn90 protective masks prevent germs? KN90 protective masks are technical and professional dust-proof masks that meet the standards formulated by our country. They can prevent viruses. The materials are non-irritating and non-allergic to the body and skin, and the design of the wearing design caters to the face more than general protection Masks must be more inseparable. KN90 has a filtration efficiency of more than 90% for non-oily particles above 0.075μm, and the size of the new coronavirus at this stage is between 0.1-0.3μm, and the key to the spread of the virus is droplet infection, which is between 1-10μm. Therefore, the actual virus protection effect of the KN90 protective mask is very good, which is better than ordinary disposable medical surgical masks and surgical protective masks. It has good air permeability and is suitable for use by staff with higher exposure risks, such as medical staff in isolation rooms and their diagnosis, suspected clinical epidemiological research staff, etc. Is the KN90 protective copper mask significantly different from N95? 1. First, let’s talk about the meaning of N. The difference between KN and N:    N indicates Not resistant to oil, which can be used to safely protect non-oil-soluble floating particles. KN95 is in the Chinese standard GB2626-2006 One of the required levels, N95 is one of the levels required in the international standard 42 CFR 84. The technical standards and test standards of these two levels are basically the same, and the filtration efficiency is 95% under the matching standards.  2. Talk about the meaning of 95 and 90:   95 means that the filtration efficiency is greater than 95%, indicating that after careful inspection, this type of breathing mask can block at least 95% of very small (0.3μm level) detection particles. 90 means that the filtration efficiency is greater than 90%, indicating that after careful inspection, this type of breathing copper mask can block at least 90% of the very small detected particles. Kn90 protective masks and Kn95 can prevent droplets from spreading viral infections, but they are not 100% safe and protective. The filterability of Kn95 is naturally better than Kn90, and the protection level of medical equipment is mandatory to be greater than Kn95. If it is self-purchased, Kn90 is also possible.  Pay attention to the key points   1. Medical equipment surgical protective masks, dark brown should be outside.  Medical equipment surgical protective mask is worn upside down, the protective power will be greatly weakened. The appropriate actual operation is to have a darker tone on the outside, and a lighter tone to itself, with a part of the metal material strip worn on the nose.   2. There is a breathing valve on the protective mask, so don’t worry.  The cyclone of the breathing valve is unilaterally outward, which does not affect the actual effect of the user's safety protection. However, for those who have already had symptoms, it is recommended not to use dust masks with breathing valves, as they cannot prevent virus infection and droplet infection from spilling out.  3. KN90 protective masks and medical care protective masks are the next choice.   General traffic travel, non-deep contact, these two types of protective masks have a certain level of work ability to isolate droplet infection, reducing risk.   4. If none of the above, then wearing an ordinary mask is better than not wearing it.   5. Regularly carry out the removal and replacement of protective masks.   If the waiting time at the airport or subway station is long, pay attention to prepare multiple protective masks in advance. It is best to replace them every 2 to 4 hours. Once the copper mask is removed, there is no need to reuse it many times.   6. Don’t believe the rumor that “smoking can protect against viruses”.   You cannot wear a mask while smoking, and your arms will touch your mouth and nose, which will increase your risk of viral infection. Harmful substances in cigarettes will continue to damage lung function tests, and second-hand smoke that is exhaled will also harm the physical and mental health of nearby people. 345
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