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There are two kinds of non-woven face masks, one is made of pure cotton absorbent gauze or knitted fabric on the surface, and various non-woven fabrics are sandwiched in the middle; the other is directly sewn from non-woven fabrics. Its filtering effect is good, but the air permeability is slightly poor. The latest variety is made of non-woven fabric materials on the surface and back, and filter paper in the middle, so that the filtering effect of non-woven face masks can be improved to a higher level. Non-woven masks There are various types of non-woven face masks in the middle. This non-woven mask has very good filterability and can effectively achieve the daily protection effect.
The barrier efficiency of non-woven face masks, especially for respirable dust below 5 microns, is the standard. Because dust of this particle size can directly enter the alveoli, it will have the greatest impact on human health. The general gauze mask, its dust blocking principle 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 gauze. 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 masks whose filter material is composed of fibers filled with permanent static electricity. When the respirable dust less than 5 microns passes through this filter material, it is attracted by static electricity and adsorbed on the filter material to capture fine dust, which really plays a role in preventing dust.
Air is like water flow, where the resistance is small, it will flow first. When the shape of the non-woven mask is not close to the human face, dangerous substances in the air will also leak in from the non-closed part and enter the human respiratory tract. So, even if you choose a mask with the best filter material. Nor can your health be guaranteed. Many foreign regulations and standards stipulate that workers should conduct regular tightness tests for non-woven face masks. The purpose is to ensure that workers choose non-woven face mask of appropriate size and wear them in the correct steps.
It is required to have small breathing resistance, light weight, hygienic wearing and convenient maintenance. This way workers will be happy to wear them consistently in the workplace and increase their productivity. The current maintenance-free masks do not need to be cleaned or replaced. When the dust resistance is saturated or the mask is damaged, it is discarded. This not only ensures the hygiene of the non-woven mask, but also saves the time and energy for workers to maintain the mask. Moreover, many masks are in an arched shape, which can not only ensure a good fit with the shape of the human face, but also reserve a certain space at the disposable non-woven mask, making it comfortable to wear.
