Dust mask is a kind of personal protective equipment, which can prevent or reduce the dust in the air from entering human respiratory organs, so as to protect life safety. Dust masks have a variety of shapes and brands, which can be divided into "disposable masks", "replaceable half masks" and "full masks".
Disposable mask:
1. No breather valve. Disposable dust masks inhaled and exhaled through filter materials are the most common in industrial enterprises. Disposable dust masks without breathing valve are mostly internal and external non-woven fabrics with filter cloth in the middle; The dust filter mainly depends on the middle filter cloth. Because the melt blown cloth has electrostatic characteristics, it can adsorb positive small particles. Because the dust is adsorbed on the filter cloth, the filter cloth can not be washed away by static electricity, so the dust mask is disposable.
2. There is an exhalation valve. Disposable dust mask for independent inhalation and exhalation. Applicable environment: food processing, catering service, metal stamping, motorcycle riding, electronic manufacturing, dust-free workshop, electroplating, welding floor, school, environmental cleaning, handicrafts, spraying processing, beauty, pharmacy, public places and other purposes. Usage: put the elastic ear hook on both ears, fit it fully with the nose, and press it gently.
Replaceable dust mask: it is a self-priming filter dust mask, which is composed of dust filter element, expiratory valve, inspiratory valve, headband, half mask, etc. the inspiratory and expiratory channels are separated. Scope of application: Petroleum and 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 and forging, machinery manufacturing, decoration and other industries.
Integrated Hood: it is divided into active air supply type and fine filtration type. It is mainly composed of filter element, cover, eye window, respirator, headband, etc. Applicable environment: applicable to high concentration toxic gas environment.
In the face of dust working environment, although the enterprise has taken some technical preventive measures, the dust can not be eliminated, and employees will also be injured by dust. Therefore, personal protection is particularly important. How to better protect employees? What kind of dust mask is effective? What should be considered when choosing dust masks?
1. Dust masks are divided into three grades according to national standards: kn100, kn95 and Kn90. Kn represents dust, smoke, fog, microorganism, etc., and the value represents the protection efficiency. The higher the value, the better the effect. Dust mask kn100 can meet various harsh dust environmental protection requirements.
2. The air tightness of the mask must be considered. A good dust mask can be combined with the face. The sealing effect of general types of masks varies from person to person. Therefore, it is very important to choose dust masks of different sizes.
3. The comfort of the mask must be considered. The dust mask is recommended to be made of silica gel, which is softer and more comfortable than other non silica gel materials and is not easy to cause skin allergic reaction. The mask made of non silica gel has high hardness, which is easy to cause facial depression.
4. Consider the smooth breathing of the mask. If the dust mask with double filter cotton and double filter surface is selected, the dust mask has small respiratory resistance and good air permeability.
July 28, 2021
