1. Dust suppression efficiency
The level of 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 the dust of this size can directly enter the alveoli, it has the greatest impact on human health. Dust masks, consisting of filter material activated carbon fiber felt or non-woven fabric, those respiratory dusts smaller than 2.5 microns pass through this filter material.
2. The degree of closeness
The anti-leakage design of the mask is to prevent air from being sucked through the gap between the mask and the human face without filtering through the consideration of technical requirements. 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. So, 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 conduct regular mask adhesion tests. The purpose is to ensure that workers choose appropriate masks and wear the masks in accordance with the correct procedures.
3. Comfortable to wear
In this way, workers will be happy to insist on wearing in the workplace and improve their work efficiency. Current maintenance-free masks abroad do not require cleaning or replacement of parts. 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 workers to maintain the mask. Moreover, many masks adopt an arched 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.