Introduction of knowledge on the protective effects of medical protective masks Introduction of knowledge on the protective effects of disposable masks Now our living environment is getting worse and worse, and haze weather often occurs in many places. However, PM2.5 protective masks and anti-smoke masks are becoming more and more popular. However, many people know little about the protection of disposable protective masks. The following editor of disposable masks will give users a brief introduction. A good filtering effect does not mean a good protection effect. The filtering efficiency only refers to the filtering effect of the filter cloth material. This is the core part of the copper mask
and cannot represent the protection of the mask effect, because the mask still has sealing problems. Even if the filtering rate of the filter cloth effect can really reach 99%, if the sealing performance is not good, the protective ability of the mask will be greatly reduced. The new standard adopts a comprehensive index of protection effect, and defines the performance of a copper mask in terms of the intuitively inhaled air quality effect after wearing the mask. This can avoid the existing masks that only pay attention to the filtering effect and ignore the lack of sealing performance. After wearing a copper mask, the inhaled PM2.5 concentration can be reduced to less than 75 micrograms per cubic meter, so that the filtered air quality can reach a good or above level. Different pollution indexes require different levels of masks to be worn and the air inhaled after wearing a mask should at least reach a good level in the air quality standards, but the air outside the mask is quite different, which puts different requirements on the performance of the mask. Therefore, this standard divides the protection level of anti-mite masks from low to high: D, C, B, and A four levels, corresponding to the air quality category setting and air pollution in the national air quality standard. Class D is suitable for moderate pollution (PM2.5 concentration of 150 micrograms/m3) and below, Class C is suitable for severe pollution (PM2.5 concentration of 250 micrograms/m3) and below, and Class B. Check the air pollution before going out in the future, and then choose a protective copper mask to wear according to the actual situation. Not everyone can wear protective masks. The elderly, children, patients with heart and lung diseases and other infirm people need to be careful when using N95 masks and follow the doctor’s advice if necessary. If you are not sure about your health or the choice between wearing a mask, you should consult your doctor. Except for some high-end models used in harsh environments, dust masks generally do not have an oxygen supply, but on the contrary, they will increase breathing resistance to varying degrees. The power of breathing comes from the movement of respiratory muscles such as the diaphragm, which means that the wearer needs to spend more energy to drive the respiratory muscles to achieve gas exchange. For elderly, frail, sick, and disabled children with weak respiratory muscles or poor cardiorespiratory function, this extra cost can be considerable. The damage caused by respiratory muscle fatigue and hypoxia caused by ventilation may exceed the risk caused by the particulate matter itself. Therefore, these people need to be careful about whether to wear a mask.
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