Can Disposable Medical Masks Filter Haze
Air pollution is serious now, especially in winter, haze comes from time to time, once the haze is inhaled into the human body, it will pose a threat to health. Everyone has their own unique tricks, but most of them are covered by masks, but now various websites, sales stores and medical stores advertise "dust-proof and haze-proof medical masks" products are all dazzling, let people see the flowers Eyes, can disposable medical masks filter smog?
Disposable medical masks include ordinary medical masks, medical surgical masks and medical protective masks, among which medical protective masks have a higher level of protection. It is made of 3 layers of materials, the inner layer is mostly non-woven fabric, the middle layer is ultra-fine polypropylene fiber melt-blown material layer, and the outer layer is non-woven fabric or ultra-thin polypropylene melt-blown material; The filtering effect of virus aerosol or harmful dust is remarkable, the blocking of non-oily particles in the air, and the filtering efficiency is ≧95%.
Although this mask has a good filterability, it can't filter completely. Because, the haze not only contains non-oily particulate matter, such as dust, acid mist, coal dust, cement dust, and microorganisms; it also contains oily particulate matter, such as oil fume, oil mist, asphalt fume, coke oven fume, and diesel engine exhaust. For oily particles and gaseous chemical substances, medical protective masks cannot completely filter out.
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