Choose dust masks, the three principles
In the industrial production environment, there are many respiratory hazards. These hazards are often invisible, some workers need long-term exposure to these hazards, if you do not take protective measures can cause disease. So how do you do for protection? Protection methods are project management and personal protection. Project management is the preferred method, but sometimes due to financial, technological, technical material and other constraints, and sometimes can not meet the standards, then they need individual protection, which is commonly referred to as wearing masks.
There are three principles of the selection mask. The first is the efficiency of dust masks resistance. The efficiency of a dust mask level of resistance is known for their fine dust, especially for 5 micron barrier efficiency of respirable dust standard. Because the size of the dust directly into the alveoli, the impact on human health maximum. Gauze masks in general, the principle is the mechanical resistance dust filter, that is, when the dust collisions to the gauze, when, after - the barrier layers, some of the large particles in the dust barrier in Sabu. However, some of the fine dust, especially less than 5 microns of dust, would not achieve the barrier effect. Now there are some foreign dust masks, which filter the permanent electrostatic charge on the fibers, those less than 5 microns respirable dust in the process of passing through such a filter, is the electrostatic attraction and adsorption in the filter, the really play a role in blocking dust.
The second principle of selection mask is a mask with the face of the shape of the seal. Because the air is like water, like, where resistance to first where the flow. We have had experience, when the flow encounters the stone will take a detour. Air is also the case when the shape of the face masks do not seal, the same hazards in the air seal will never leak into, into the human respiratory tract. So, even if you use even the best filter masks can not protect your health. Now many foreign regulations, standards, workers should regularly test mask seal. Purpose is to ensure that workers use respirators in the correct way to wear a mask.
Mask selected third principle is comfortable to wear. The requirements include respiratory resistance is smaller, lighter, wearing hygiene and easy maintenance. Such workers are happy to adhere to wear in the workplace. Is now a maintenance-free masks, do not clean or replace the parts, when the resistance saturated or dust masks can be discarded after the break, it will ensure a mask of health care workers in face masks also eliminates the time and effort. Moreover, many masks are used arch design, both to ensure that the shape of the face with a good seal at the mouth and nose and can retain a certain space, comfortable to wear.
If you choose a mask to follow the above three principles, then you will be able to choose a comfortable and effective dust masks.
| Updated:2011.11.17 Source: Clicks:1565
