Conditions Of Use Of Disposable Masks

Disposable dust masks come in a wide variety and must be selected for different operational needs and working conditions.
First of all, it should be selected according to the concentration and toxicity of the dust. According to GB/T18664 "Selection, use and maintenance of respiratory protective equipment", as half masks, all dust masks 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 a respirator with a higher level of protection should be used.
If particulate matter is highly toxic, carcinogenic and radioactive, the filter material with the highest filtration efficiency should be selected.
If the particles are oily, it is important to choose the appropriate filter material.
If the particles are needle-like fibers, such as slag wool, asbestos, glass fibers, etc., because the dust mask cannot be washed, the mask with microfiber is easy to cause facial irritation in the facial sealing part and is not suitable for use.
For high temperature, high humidity environment, it will be more comfortable to choose a mask with an exhalation valve, and choosing a mask that can remove ozone for welding can provide additional protection, but if the ozone concentration is higher than 10 times the occupational health standard, the mask can be replaced, and the dust and poison combination filter element. For environments where there is no particulate matter, but only some peculiar smells, choosing a dust mask with an activated carbon layer is much lighter than wearing a gas mask, such as some laboratory environments, but because the national standard does not regulate the technical performance of such masks.