What kind of mask is more effective? Mask wear is also stress

The protective effect of masks should be evaluated in terms of the degree of head-to-face adhesion, respiratory resistance, particulate filtration efficiency, suitability of the population, and hygienic safety. Common masks and disposable non-woven masks currently on the market may have a certain blocking effect on dust and large particles, but protection against haze, PM2.5 or microbial particles such as bacteria and viruses is insufficient.

Picking up a smash mask is learned

To further understand the effect of wearing anti-particulate masks, scholars from the Chinese Center for Disease Control and Prevention have done a simple little experiment. The experimental results show that: In the environment of PM2.5 concentration of about 350μg/m3: after wearing a KN95 mask, the reduction rate of PM2.5 is more than 84%; after wearing a KN90 mask, the reduction rate of PM2.5 is 81.5% Wearing ordinary disposable non-woven masks has no effect on reducing PM2.5. The results suggest that wearing anti-particulate masks on smog days is effective. After covering the sampling port with a mask, the reduction rate of the KN95 mask to PM2.5 was greater than 91%, and the drop rate of the ordinary disposable non-woven mask was 45.5%.

It can be seen that ordinary disposable non-woven masks have a certain ability to filter particulate matter, but can not closely fit the face when worn, so they can not play a role in preventing particulate matter when actually worn. Wearing anti-particulate masks can reduce the concentration of PM2.5 and reduce the exposure of people to particulate matter, which is beneficial to health protection.

Combination of "Respiratory protection self-priming filter type particulate respirator" (GB2626-2006), "Selection, use and maintenance of respiratory protection products" (GBT 18664-2002) and "Technical requirements for medical protective masks" (GB 19083-2010 ) It is recommended to choose masks marked with KN95 or N95 (with a minimum efficiency of 95% for filtering non-oil particles) and FFP2 (with a minimum filter efficiency of 94%). In addition, in the purchase of masks, but also consider the user's face and comfort and other factors.

Wear masks also pay attention

Always wash your hands before wearing the mask and before and after removing the mask. The face of the mask is colored outwards, with one side of the metal plate up. Press the metal sheet on the mask tightly along both sides of the nose bridge so that the mask fits the face. After wearing a mask, avoid touching the mask. If you must touch the mask, wash your hands thoroughly before and after touching. Each time you wear a mask, you must wear a tightness check. Cover your mask with both hands and exhale. If you feel that gas leaks from the nose clip, you should readjust the nose clip. If you feel that gas leaks from both sides of the mask, you need to further adjust the position of the headband and ear tape. If the seal cannot be obtained, the mask model needs to be replaced.

Special people should wear masks carefully

Wearing masks will increase breathing resistance and stifling sensation. Not everyone wears masks. Special people must choose protective masks carefully.

Pregnant women wear protective masks, should pay attention to their own conditions, choose a better comfort products, such as protective masks equipped with exhalation valve, reduce breath resistance and stuffy feeling. Consult a professional physician before wearing to confirm that your physical condition is suitable. Elderly and chronically ill patients have different physical conditions. For example, patients with cardiopulmonary diseases may cause discomfort after wearing, and may even worsen the existing condition. These people should consult a doctor and seek their professional guidance. Children in the growth stage, and its small face, the general mask is difficult to achieve a close effect, it is recommended to choose the regular manufacturers suitable for children to wear protective masks.