Ordinary gauze masks are dustproof, gauze masks can onl […]
Ordinary gauze masks are dustproof, gauze masks can only block part of the dust with larger diameters, and cannot prevent dust with small diameter particles. Even if you wear a few more layers, it will not enhance the protection of gauze masks. effect.
General gauze masks cannot have any dust-proof effect. At the same time, gauze masks cannot replace dust masks and gas masks. General dust masks can be used to prevent dust, smog and particles. In a chemical environment, such as an environment with low concentration of acid gas, organic vapor, etc., you must wear a gas mask.
How gauze masks work
The dust blocking principle of gauze masks is mechanical filtration, that is, when dust hits the gauze, it passes through layers of barriers to block some large particles of dust in the sand cloth. However, some fine dust, especially dust less than 5 microns, will pass through the mesh of the gauze and enter the respiratory system, while dust below 5 microns can directly enter the alveoli, which has the greatest impact on human health. Wear a few more. The layer will not enhance the protective effect.
At present, the gauze masks that many factories and mines are still distributing and using, even if they are 12 layers thick, their dust blocking effect is very poor. According to the determination of relevant departments, the dust resistance rate of talc dust and gauze masks is only 60%-80%, while the dust resistance rate of dust below 5μm, which is more harmful to the human body, is only about 10%.
Note the use of gauze masks
1. The outer layer of a gauze mask usually accumulates a lot of dirt and bacteria in the outside air, but the inner layer blocks the exhaled bacteria and saliva, so the two sides cannot be used alternately, otherwise it will contaminate the outer layer. It becomes a source of infection by inhaling the body when it is directly attached to the face.
2. When the gauze mask is not worn, it should be folded into a clean envelope, and the mask close to the nose and mouth should be folded inward. Be careful not to put it in your pocket or hang it around your neck.
3. If the gauze mask is moistened by the exhaled heat or saliva, its function of blocking germs will be greatly reduced. Therefore, it is best to prepare a few more gauze masks for replacement, which should be changed and washed once a day.