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Why can't gauze masks be used for respiratory protection?

Word:[Big][Middle][Small] QR Code 2020/5/26     Viewed:    
Dust masks have a filtering efficiency of more than 90% and are close-fitting masks, so that the mask and face can achieve good tightness, preventing dust from entering the respiratory system through the leakage place.


Gauze mask (or non-woven cloth mask) has low filtering efficiency, and cannot be closely connected with the face, which is very easy to leak and cannot effectively protect the user.


According to Chinese government regulations, gauze masks cannot be used to prevent dust. It is a serious illegal act to provide gauze masks, non-woven masks or masks that do not meet national standards.
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