First, the dust suppression efficiency of respirator respirator is based on its barrier efficiency for fine dust, especially for respirable dust below 2.5 microns. Because this particle of dust can directly enter the alveolus, it has the greatest impact on human health. Dust respirator, its filter material activated carbon fiber felt pad or non-woven fabric, those less than 2.5 microns of respirable dust in the process of passing through this filter material.
Two. The design of preventing the leakage of the close degree respirator is a technical requirement to prevent air from being inhaled through the mask and the human face gap without being filtered. Air is like a stream. Where resistance is small, it flows first. When the mask shape is not close to the face, the dangerous substance in the air will leak into the human respiratory tract. Well, even if you choose a good filter mask. It can not guarantee your health. Many foreign laws and regulations stipulate that workers should conduct regular tests on masks. The purpose is to ensure that workers choose suitable respirators and wear masks according to proper procedures.
Three, wear comfort so that workers will be willing to stick to and improve their work efficiency in the workplace. The maintenance - free mask in foreign countries does not need to be cleaned or replaced. When the dust saturation is saturated or the mask is damaged, it is discarded. This ensures the health of the mask and the time and energy of the worker's maintenance mask. Moreover, many masks are arched, which can ensure a good fit with the shape of the face and keep a certain space at the mouth and nose.