First, the dust-proof efficiency of the mask. The dust blocking efficiency of a mask is based on its blocking efficiency for fine dust, especially for respirable dust below 5 micrometers. Because dust of this particle size can directly enter the alveoli, it has the greatest impact on human health. General gauze masks, the principle of dust blocking is mechanical filtration, that is, when dust hits the gauze, through layers of barriers, some large particles of dust are blocked 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. There are some dust-proof masks abroad. The filter material is composed of fibers charged with permanent static electricity. When passing through this filter material, the respirable dust less than 5 microns is attracted by static electricity and adsorbed on the filter material to capture the fine particles. Dust, really play a role in dust blocking. Second, the degree of closeness between the mask and the shape of the face. Air is like water flow, where the resistance is small, it flows first. When the shape of the mask is not close to the human face, the dangerous objects in the air will leak in from the non-closed place and enter the human respiratory tract. So, even if you choose a copper mask
with the best filter material. Nor can it protect your health. Many foreign regulations and standards now require that workers should regularly test the tightness of masks. The purpose is to ensure that workers choose masks of the right size and wear masks according to the correct steps. Third, it is comfortable to wear. It requires low breathing resistance, light weight, sanitary wear and easy maintenance. In this way, workers will be willing to stick to the workplace and improve their work efficiency. The maintenance-free masks in foreign countries do not need to be cleaned or replaced. When the dust barrier is saturated or the mask is damaged, it will be discarded. This not only ensures the hygiene of the copper mask, but also saves the workers the time and effort to maintain the mask. In addition, many masks adopt arched shapes, which can not only ensure a good fit with the face shape, but also retain a certain amount of space in the mouth and nose, which is comfortable to wear.
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