Can cotton gauze mask prevent dust?

In 2000, the State Economic and Trade Commission issued the Standard for the Equipment of Labor Protection Articles (for Trial Implementation), which clearly requires that gauze masks should not be used as dust masks. Because the general cotton gauze mask can only block some dust, and its dust blocking principle is mechanical filtration, that is, when dust collides with gauze, some large particles of dust are blocked in the emery cloth through layers of barriers. However, some fine dust, especially dust less than 5 microns, will enter the respiratory system through the gauze mesh, while dust less than 5 microns can directly enter the alveoli, which has the greatest impact on human health, and wearing more layers will not enhance the protective effect. Therefore, cotton gauze masks can't play a dustproof role.

First of all, we should look at the safety of dust masks, which is mainly reflected in the protection level of dust masks. Each brand of dust mask has its protection grade N90 (90%), N95 (95%) and N 100 (99.97%). The higher the grade of dust mask, the better the dust-proof effect and the higher the safety. The protection level of each brand must pass the safety of special labor protection articles. (Pay attention to safety) Let's take a look at the comfort of the dust mask. As far as the semi-mask of dust mask is concerned, the advanced imported silicone material is softer and more comfortable, extremely skin-friendly, which makes the dust mask perfectly combined with the face, comfortable and safe. Finally, let's take a look at the service life of the dust mask. Wear a safe and comfortable dust mask. Although the initial cost of dust mask is high, the longer the service life, the lower the use cost and the more economical it is! (Pay attention to economy) Just meet the above three points.