Dust blocking efficiency. The dust blocking efficiency of a mask is based on its blocking efficiency for fine dust, especially respirable dust below 2.5 micrometers. Because dust of this particle size can directly enter the alveoli, it has the greatest impact on human health. The principle of dust blocking of gauze masks is mechanical filtration, that is, when dust collides with gauze, it will pass through layers of barriers to block some large particles of dust in the sand cloth. For some fine dust, especially dust less than 2.5 micrometers, it will pass through the gauze net. Enter the respiratory system. The filter material of the dust-proof mask is made of activated carbon fiber mat or non-woven fabric, and the respirable dust less than 2.5 micrometers passes through the filter material.
The tightness of the mask and the anti-side leakage design are technical requirements to prevent air from being sucked in from the gap between the mask and the face without being filtered. Like water flow, air flows first where there is little resistance. Where do medical protective masks start? When the shape of the mask is not close to the face, dangerous objects in the air will leak in from the close place. Enter the human respiratory tract. Then, even if you choose a mask with the best filter material. It cannot guarantee your health. Many foreign standards and regulations stipulate that workers should regularly test the tightness of masks. The goal is to ensure that workers choose the right masks and wear them in accordance with the correct procedures.
Wear it comfortably, so that workers are willing to wear it in the workplace and improve their work efficiency. At present, foreign maintenance-free masks do not need to be cleaned or replaced. When the dust resistance is saturated or the mask is damaged, it will be discarded, which not only ensures the hygiene of the mask, but also saves the time and energy of workers in maintaining the mask.