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How to judge the dust resistance efficiency of non-woven masks

Update:29-01-2021
Summary:

There are two types of non-woven masks. One is made of […]

There are two types of non-woven masks. One is made of pure cotton absorbent gauze or knitted fabric with various non-woven fabrics in between; the other is directly sewn from non-woven fabrics. It has good filtering effect and poor air permeability. The latest product is non-woven material on the surface and back, and filter paper in the middle, which makes the filtering effect of non-woven masks to a higher level.


Dust blocking efficiency
The dust blocking efficiency of non-woven  disposable mask is based on its blocking efficiency for fine dust, especially for respirable dust below 5 micrometers. Because dust of this size can directly enter the alveoli, it has the greatest impact on human health. General gauze masks, the principle of dust blocking is mechanical filtering, 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 the static electricity and is adsorbed on the filter material. Dust, really play a role in dust blocking.
Air is like water flow, where the resistance is small, it flows first. When the shape of the non-woven mask is not close to the human face, the dangerous objects in the air will leak in from the non-close place and enter the human respiratory tract. 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 regularly conduct tests on the tightness of non-woven masks. The purpose is to ensure that workers choose non-woven masks of appropriate size and wear them in the correct steps.
It requires low breathing resistance, light weight, sanitary wear, and convenient maintenance. In this way, workers will be willing to stick to the work place 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 guarantees the hygiene of the non-woven mask, but also saves workers the time and effort to maintain the mask. Moreover, many masks adopt arched shapes, which can not only ensure a good fit with the face shape, but also reserve a certain amount of space in the non-woven mask, which is comfortable to wear.

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