Conditions of use of disposable surgical masks

Disposable surgical masks are available in a variety of ways and must be selected for different operational needs and working conditions.

The first choice should be based on the concentration and toxicity of dust. According to GB/T18664 "Selection, Use and Maintenance of Resrespiratory Protective Equipment", as a half mask, all dust masks are suitable for the environment where the concentration of harmful substances does not exceed 10 times the occupational exposure limit; otherwise, a full mask or respirator with higher protection level should be used.

If the particles are highly toxic substances, carcinogens and radioactive, the filter materials with higher filtration efficiency should be selected.

If the particles are oily, be sure to select the appropriate filter material.

If the particles are needle-like fibers, such as slag wool, asbestos, glass fiber, etc., the respirator can not be washed with water, and the respirator with tiny fibers attached on the sealing part of the face is likely to cause facial irritation, so it is not suitable for use.

For high temperature and high humidity environment, choose respirator with exhalation valve will be more comfortable, choose respirator with ozone removal for welding can provide additional protection, but if the concentration of ozone is higher than 10 times the occupational health standard, you can replace the mask, with dust and toxic combined filter element. For the environment where there is no particulate matter but only some peculiar smell, it is much more portable to choose dust masks with activated carbon layers than to wear gas masks, such as some laboratory environments. However, due to the standard, technical performance specifications for such masks are not carried out.