Conditions Of Use Of Disposable Medical Masks
Release time：2023-08-23
There are various types of disposable medical masks, and the selection must be based on different job requirements and working conditions.
The first choice should be based on the concentration and toxicity of the dust. According to GB/T18664 "Selection, Use and Maintenance of Respiratory Protective Equipment", as a half-face mask, all dust respirators are suitable for environments where the concentration of harmful substances does not exceed 10 times the occupational exposure limit, otherwise a full face mask or protection level should be used Higher respirator.
If the particulate matter is highly toxic, carcinogenic and radioactive, a filter material with a higher level of filtration efficiency should be selected.
If the particulate matter is oily, be sure to select a suitable filter material.
If the particulate matter is needle-like fibers, such as slag wool, asbestos, glass fiber, etc., dust masks cannot be washed with water, and masks with microfibers attached to the sealing parts of the face can easily cause facial irritation and are not suitable for use.
For high temperature and high humidity environments, it will be more comfortable to choose a mask with an exhalation valve. Choosing a mask that can remove ozone for welding can provide additional protection. However, if the ozone concentration is higher than 10 times the occupational health standard, the mask can be replaced with dust, Poison combination filter element. For environments where there is no particulate matter but only some peculiar smells, it is much lighter to choose a dust mask with an activated carbon layer than to wear a gas mask. For example, in some laboratory environments, the technical performance of such masks is not regulated due to the standard.
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