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Is wearing a medical mask useful for smog?

2021-07-25
As smog strikes, wearing anti-haze masks has become the most economical and effective method of self-protection. Unfortunately, the vast majority of smog victims still do not know how to choose anti-smog masks. What kind of anti-smog mask is effective against haze, and are medical masks useful for haze?

So is the smog coming and wearing a medical mask is useful for smog? Medical protective masks come in multiple models according to different protective performances. The highest-end anti-smog mask manufacturer's ex-factory price is 39 yuan. The fabric can block particles with a diameter of 0.3 micron up to 95% or more. There is an air cushion on the edge of the mask. And the plastic bracket, the sealing is good, and the breathing resistance is very low.

Medical masks include ordinary medical masks, medical surgical masks and medical protective masks, among which medical protective masks have the highest protection level. It is made of 3 layers of materials, the inner layer is mostly non-woven fabric, the middle layer is ultra-fine polypropylene fiber meltblown material layer, and the outer layer is non-woven fabric or ultra-thin polypropylene meltblown material; it is resistant to micro-borne virus aerosol Or the filtering effect of harmful dust is significant, the blocking of non-oily particles in the air, and the filtering efficiency is ≧95%. Even this kind of mask cannot completely filter the smog. 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.

Medical protective masks are usually used in the medical environment and are not very suitable for ordinary people to wear in their daily lives. For example, N95 masks are usually used for occupational respiratory protection to block certain microbial particles (such as viruses, bacteria, molds, Bacillus anthracis, Mycobacterium tuberculosis, etc.), but because of their thick texture, they are not comfortable to wear at ordinary times.

When buying anti-haze masks, in addition to considering the filtering effect of anti-haze mask materials on PM2.5, there are two key factors. One is the degree of fit with the face. We tend to recommend dust-proof masks on the head. Instead of a dust mask hung on the ear. The second is to wear anti-haze masks and check whether breathing is smooth. If you do not breathe smoothly, there will be a lot of water vapor, which will cause inconvenience to people wearing glasses. Therefore, it is recommended to buy a mask with a breathing valve.

In addition, the outer layer of the mask often accumulates a lot of dust and bacteria in the outside air, while the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides cannot be used alternately. At the same time, when not in use, the anti-haze mask should be folded and placed in a clean sealed bag, and the side close to the nose and mouth should be folded inward. Don't just put it in your pocket or hang it around your neck.



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