What should be considered in the selection and use of dust masks?

Dust mask is a kind of personal protective equipment, which can prevent or reduce dust entering human respiratory organs, so as to protect life. There are various shapes and brands, which can be divided into "disposable mask", "replaceable half mask" and "full mask".

Sterile mask:

1. No breathing apparatus. Disposable dust masks with filter materials are the most common in industrial enterprises. Most disposable dust masks without respirator are made of inner and outer non-woven cloth, with a filter cloth in the middle, which is mainly used to filter dust. Because the spray will produce static electricity, it can absorb positive particles. Because the dust is adsorbed on the filter cloth, the filter cloth will not be washed by static electricity, so the dust mask is disposable. 2. Use the exhalation valve. Disposable dust mask that can be used alone and exhaled. Application environment: it can be used in food processing, catering service, metal stamping, motorcycle, electronic manufacturing, dust-free workshop, electroplating, welding site, school, environmental cleaning, handicraft, painting processing, beauty, medicine, public places, etc. Usage: put the elastic ear hook in both ears and press it gently with full nose.
Dust mask can be replaced: it is composed of filter element, expiratory valve, inspiratory valve, headband, half mask, etc. The inhalation and exhalation channels are separate. Application fields: petroleum, natural gas, smelting, coal, light industrial products manufacturing, organic chemical raw materials manufacturing, non coal mines, chemical products manufacturing, medicine, food, feed, building materials manufacturing, metallurgy, construction, casting, machinery manufacturing, decoration and other industries.
Synthetic cover: it is divided into active type and careful type. The device is mainly composed of filter element, cover body, eye window, expirator, headband and other components. Application environment: it can be used in high concentration toxic gas environment.

In the face of dust working environment, although the enterprise has taken some technical preventive measures, but the dust can not be eliminated, employees will be injured by dust, so personal protection is particularly important. How to better protect employees, what kind of dust mask effect is good? What are the considerations for choosing dust masks?

1. According to the national standard, dust masks are divided into kn100, kn95 and Kn90. Kn refers to dust, smoke, fog, microorganism, etc. The number indicates the protection efficiency. The higher the value, the better the effect. Kn100 dust mask can meet various harsh environmental requirements.
2. The air tightness of the mask must be considered. Superior dust mask can be combined with face. Different kinds of masks have different sealing effects. Therefore, it is very important to choose different specifications of dust masks.
3. Be sure to take comfort into account. The dust mask made of silica gel is more soft and comfortable than other non silica gel materials, and is not easy to cause skin allergic reaction. The mask without silicon material has higher hardness, which is easy to cause facial indentation.
4. Keep breathing smooth and avoid using masks. If double filter cotton and double filter face dust mask is selected, the dust mask has small respiratory resistance and good air permeability.