There are various kinds of disposable dust masks, which must be selected for different operational needs and working conditions.
First of all, it should be selected according to the concentration and toxicity of 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 hazardous 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 the particulate matter is highly toxic, carcinogenic and radioactive, the filter material with the highest level of filtration efficiency should be selected.
If the particulate matter is oily, be sure to select the appropriate filter material.
If the particulate matter is needle-like fibers, such as slag cotton, asbestos, glass fiber, etc., due to dust masks can not be washed, sticking to the tiny fibers of the mask in the face sealing part of the face is easy to cause facial irritation, is also not suitable for use.
For high temperature, high humidity environment, choose a mask with an exhalation valve will be more comfortable, choose a mask that can remove ozone for welding can provide additional protection, but if the ozone concentration is higher than 10 times the occupational hygiene standards can be replaced with a mask, with a combination of dust, poisonous filter elements. For the absence of particulate matter, but only the presence of certain odors of the environment, the choice of dust masks with activated carbon layer is much lighter than wearing a gas mask, such as some laboratory environments, but due to the national standards do not regulate the technical performance of such masks.
Note:
1, disposable masks should be used within the validity period.
2, one-time use only, destroyed after use.
3, packaging damage, prohibit the use.
4, stored in relative humidity does not exceed 80%, no corrosive gases and well-ventilated room, avoid high temperature.
5, pay attention to the production date.