Which mask has a good dustproof effect?

Under the epidemic situation, we also know the different types and functions of masks, such as N95 masks, disposable masks, surgical masks and dust masks. So, what is the difference between the protective effects of these masks?

1, N95 mask. This is a mask certified by the National Institute of Occupational Safety and Health, which means that 95% of aerosols can be filtered out under certain airflow adjustment.

2, disposable masks. Also known as disposable medical mask, it is suitable for general medical environment, that is, the mask that we often wear to block the spread of virus, which is mainly used for daily protection of pollutants exhaled or ejected from nasal cavity and mouth.

3, surgical masks. It is mainly a protective mask worn by medical staff in operating room, which can prevent the spread of respiratory tract microorganisms and dander droplets. It can also prevent the patient's body fluids from being transmitted to the doctor during the operation.

4, dust mask. Such masks are essential for workers exposed to dust, and can also be used for daily protection against smog and pollen.

The above are common mask types and usage scenarios. It can be seen that N95 mask has the best protection effect. Everyone who has come into contact with this mask knows that its thickness is thicker than other masks, so is its protective performance determined by its thickness? It is not because it is thick, so the protection effect is good. The main difference between it and other masks is the filter layer. Its filter layer is made of melt-blown superfine fiber material, which has good density but poor air permeability. Therefore, in order to solve the air tightness problem, some N95 masks will be designed with breathing valves. However, it should be noted that its protection is good, but its surface moisture resistance is far lower than that of medical masks. After contact with alcohol, water or even blood, its material structure will be destroyed and its filtration performance will also be affected.