Viruses cannot directly in the air, it KN95 Face Mask needs to be attached on the particulate matter, or droplets, is let's say the media such as dust, pollen, smoke. It can't fly, have to have a "spaceship" can free in the air. So we just defend it "spaceship", can isolate it outside the body. And their "spaceship", that is, those particles, we've said just now, the existing disposable respirators N953 layer filtration efficiency is highest, and the droplets? Droplets than larger particles, generally less than 5 microns, so in addition to the disposable respirators N953 layer, medical disposable respirators 3 layer can play a protective role, because medical disposable respirators 3 layer on the filtration efficiency of PM5, be able to get more than 90%, which is zhong he said at the time of medical protective layer 3 disposable respirators can causes of the new type of coronavirus.
First of all, what is the haze layer 3 disposable respirators? In fact this is a concept problem, three layers and disposable respirators are never regardless of what do not prevent the haze and haze said. I understand it, the haze is 3 layers of disposable respirators can prevent PM2.5 particulate matter layer 3 disposable respirators, disposable respirators that are most likely N953 layer. Based on the above understanding, disposable Full Body Disposable Coverall respirators N953 layer protection this new type of coronavirus didn't have any problem, even more than rich enough. So, don't separate the haze and virus prevention to understand, virus dependent particles and droplets in the air, it can prevent particulate matter, nature can prevent the virus. This problem is to separate, the air valve is only 3 layer disposable respirators whistles, the key is to see what is disposable respirators 3 layer three layer disposable respirators! If it's non-woven fabric or cotton layer 3 disposable respirators, it have air valve were less than good protective effect on the virus; But if it is disposable respirators N953 layer, even if it's free air valve, also does not affect its protective new coronavirus.
Air valve is actually a very good design, especially in the N95 this level of layer 3 disposable respirators. Because three layers and the higher the degree of protection of the disposable respirators, the greater the filtration efficiency, means that the breathing resistance. Like no air valve N953 disposable respirators, I wear a moment will not suppress too, especially to catch up the stairs, bike after the strenuous exercise, oppressed feeling will increase, and feel it is hot flashes, will be more and more uncomfortable. Air valve design is fundamentally solved the problem, especially the source air Medical Disposable Coverall valve design, is also his own patent design, will make you very comfortable, natural breathing, long wear also won't have particularly strong sense of depressive feeling. In the face of new coronavirus, how can the choose and buy of right protection layer 3 disposable respirators