Advantages: very good ventilation; can filter toxic gases; can keep warm; can absorb water; can be waterproof; stretchable; will not be messy; feel very good and quite soft; compared to other masks, the texture is relatively light; It is very elastic and can be restored after stretching; the price is relatively low, and it is suitable for mass production; compared with other fabric masks, the mask cannot be cleaned; because the fibers are arranged in a certain direction, it is easier to be Tear off; Compared with other textile masks, the strength and durability of disposable masks are worse than other masks. Editing conditions of use There are various types of dust 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 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 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 may 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 by the standard.