Understand the protective effect of disposable masks

Release time£º2020/7/30

   You have to know the protective effect of disposable masks. With the outbreak of haze in most areas of China in recent years, PM2.5 protective masks have become very popular. More and more attention has been paid to them. At present, wearing masks has become a protection against fog. The way to haze weather? So what kind of mask is suitable for haze weather? Which effect is good?
The protective effect of disposable masks 1. Good filtering effect does not mean good protective effect
The filtration efficiency only refers to the core part of the dust mask-the filtering effect of the filter cloth material, and does not represent the protective effect of the mask, because the mask also has the problem of sealing. Even if the filtering effect of the filter cloth can really reach 99%, if the sealing performance is not good, the protective ability of the mask will be greatly reduced. The new standard uses a comprehensive index such as "protective effect" for the performance of masks, and defines the performance of masks with the intuitive effect of "air quality inhaled after wearing a mask". This can avoid that the current masks only pay attention to the filtering effect and ignore the lack of sealing. After the mask is worn, the concentration of PM2.5 inhaled can be reduced to less than 75 micrograms per cubic meter, and the air quality inhaled into the body after filtration can reach a level of good or above, which is qualified.

One Disposable mask

The protective effect of one disposable masks 2. Different pollution indexes require different levels of masks
The air inhaled after wearing the mask should at least reach the "good" level in the air quality standard, but the air outside the mask is very different, which puts forward different requirements on the performance of the mask. Therefore, the standard divides the protection level of anti-haze masks into four levels from low to high: D, C, B, and A, which correspond to the air quality category setting and air pollution in the national air quality standard-D Class C is suitable for moderate pollution (PM2.5 concentration ¡Ü 150 micrograms per cubic meter) and below, Class C is suitable for severe pollution (PM2.5 concentration ¡Ü 250 micrograms per cubic meter) and below, and Class B is suitable for severe pollution (PM2 .5 Concentration ¡Ü 350 micrograms per cubic meter), Class A is used when the PM2.5 concentration reaches 500 micrograms per cubic meter. In the future, you can check the air pollution situation before going out, and then choose the protective mask to wear according to the actual situation.
The protective effect of disposable masks 3. Not everyone can wear protective masks
The elderly, children, patients with heart and lung diseases and other frail people need to be cautious when using N95 masks and follow the doctor's advice if necessary. If you are unsure about whether your physical condition is suitable or the pros and cons of wearing a mask, you should consult your doctor.

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