Industry article / Mask equipment manufacturer introduces the protection level of anti-haze mask and matters to wear
Mask equipment manufacturer introduces the protection level of anti-haze mask and matters to wear
If you must go out in haze days, wearing anti-haze mask is the main protective measure. Any mask has a certain protective effect, but it is recommended to choose a good protective mask against haze. How to choose an anti-haze mask? How to wear anti-haze mask correctly? What should notice when wearing anti-haze mask?
According to the national standards, the protection level of masks is divided into four levels from low to high: D, C, B and A, corresponding to different air quality conditions.
1. The class A protective mask with the highest level of protection is suitable for the environment with extremely severe pollution, and the protective effect is also the best. The limit of PM2.5 concentration is no more than 500 g/m3, and the maximum limit of exposed PM2.5 concentration is 700 g/m3, which can block more than 90% of the particles;
2. Protection grade B respirator is suitable for heavy pollution and below ambient air quality index. PM2.5 concentration limit is no more than 350 g/m3, and the maximum allowable exposure limit is 500 g/m3, filtering harmful particles ≥85%;
3. Protection grade C respirator is suitable for heavy pollution and below ambient air quality index. PM2.5 concentration limit is no more than 250 g/m3.
4. The class D protective mask with the lowest level of protection has poor blocking effect on particles, and is suitable for moderate and lower pollution of ambient air quality index. The limit of PM2.5 concentration is no more than 150 g/m3, and the maximum limit of exposed PM2.5 concentration is 200 g/m3, filtering harmful particles ≥65%;
Anti-haze masks of different protection levels should be prepared and worn depending on the weather. It's not that the more effective the filter, the better the mask, because the more effective the filter, the more resistance the wearer feels to breathing. When inhalation resistance is too large, people will feel dizzy, chest tightness and other uncomfortable conditions, wearing high respiratory resistance mask for a long time will have adverse effects on health.
Please follow the instructions when wearing anti-haze mask. When wearing the mask, the nose, mouth and chin must be completely covered. Keep the mask close to the face. The better the tightness, the better the protective effect.
Not everyone is suitable to wear anti-haze mask, the mask's tight structure and filter material will increase respiratory resistance, reduce comfort. Any smog mask that doesn't fit 100% of the face can't escape PM2.5.