N95 masks are the most common masks used by healthcare professionals in clinical settings and have a strong protective capacity. The protection capacity of a three-layer cotton mask is defined as five, and the protection capacity of a one-layer N95 mask is 100, and the difference is extremely significant. For N95 masks, the filtering effect of this 0.3 micron diameter particles is greater than or equal to 95%, so N95 has a strong protective ability mainly because of its principle of electrostatic adsorption. n95 masks mainly have three layers, the innermost central layer is a non-woven fabric, this non-woven fabric is made of polypropylene, which is a kind of ultra-fine electrostatic fiber, has electrostatic adsorption ability. So in normal breathing, the air can be filtered, but the virus or dust contained inside is all electrostatic adsorption. Specific use time is as follows: 1, in the hospital ward virus is more intensive, N95 mask should be used once, because of its airtight effect, all are adsorbed on the virus, but because it carries more viruses, so take off after immediately destroy; 2, ordinary people are not much exposure to viruses, you can reuse this mask; if you wear one hour a day N95 mask, under normal circumstances this mask can be used for a week, put all Static completely consumed as its indications; so generally go out, such as open places, not densely populated places, the virus is relatively small, go out and come back to put the mask in the ventilation to deal with, or do a simple disinfection treatment can be reused, which can reduce waste, rational use of valuable medical resources. n95 mask is powerful, but for different use requirements, the use of time is different, to Specific analysis of the specific situation. Content source: Dr. You Lai