Mask selection method and applicable crowd
Dust suppression efficiency
The dust blocking efficiency of the mask is based on its blocking efficiency for fine dust, especially for respiratory dust below 2.5 microns. Because this size of dust can directly enter the alveoli, it has the greatest impact on human health.
Gauze masks, the principle of dust suppression is mechanical filtration, that is, when the dust hits the gauze, it passes through layers of barriers to block some large particles of dust in the sand cloth. For some fine dust, especially the dust smaller than 2.5 microns, it will pass through the gauze mesh and enter the respiratory system. Dust masks are composed of filter material activated carbon fiber felt pads or non-woven fabrics. Those breathable dusts less than 2.5 microns are blocked during the process of passing through this filter material, which plays the role of filtering air.
The mask's anti-leakage design is to prevent air from being sucked through the gap between the mask and the human face without filtering through the technical considerations. Air is like water flow, wherever resistance is small, it flows first. When the shape of the mask is not close to the face, the dangerous objects in the air will leak into the airway from the non-closed place. Then, even if you choose a mask with the best filter material. Nor can it protect your health. Many foreign regulations and standards stipulate that workers should regularly conduct mask adhesion testing. The purpose is to ensure that workers choose a mask of the appropriate size and wear the mask in the correct steps.
Comfortable to wear
Only in this way will the worker be willing to insist on wearing in the workplace and improve his work efficiency. Current maintenance-free masks abroad do not need to be cleaned or replaced. When the dust barrier is saturated or the mask is damaged, it is discarded. This not only ensures the hygiene of the mask but also saves the time and effort of the worker to maintain the mask. Moreover, many masks adopt an arch shape, which can not only ensure a good adhesion with the shape of the face, but also reserve a certain space at the mouth and nose, which is comfortable to wear.
People with heart or respiratory problems (such as asthma and emphysema), pregnancy, dizziness after wearing, difficulty breathing, and sensitive skin.