Dust (especially industrial dust) is the enemy of human health. The finer the dust is, the longer it stays in the air, and the easier it is to be inhaled by the human body. 1n particular, the respirable dust less than 5 microns will directly enter into the alveoli and deposit, leading to silicosis or other pneumoconiosis, which may lead to the loss of labor ability or death
with the emergence of various air pollution problems, dust masks have become a necessity in people’s lives. How much do you know about the dust masks you often use? Let’s introduce some knowledge about dust masks
1. types of dust masks
1. Classification of dust masks:
according to their structure and working principle, they are divided into two categories: self-priming filter type and air supply type
self priming filter type: the working principle of the filter type mask is to make the air containing harmful substances filtered through the filter material of the mask and then inhaled by people
air supply type: it refers to the clean air source isolated from harmful substances, which is sent to human face for breathing through power, such as air compressor, compressed gas cylinder device, etc
the structure of the self-priming filter dust mask is divided into two parts: one is the mask of the mask, which can be simply understood as a shelf of the mask; The other is the filter material part, including the filter cotton used for dust prevention and the chemical filter box used for anti-virus
there are many types of self-priming filter type dust masks:
half face type: the mask only covers the respiratory organs (mouth and nose)
comprehensive type: the mask can cover the whole face, including the eyes
electric air supply type: it is driven by battery and motor to pump the air containing harmful substances into the filter material for people to breathe after filtration
the half face mask can be divided into:
maintenance free type: this kind of mask is mainly dust-proof, and its main body and filter material are integrated, so the filter material cannot be replaced
low maintenance type: the main body of the mask has no replaceable parts. 1f it is damaged, the whole mask should be replaced
general maintenance type: when the parts of the mask are damaged, they can be replaced one by one, and maintenance should be paid attention to at ordinary times2. Maintenance methods of dust mask
1. When not wearing, the mask should be folded and put into a clean envelope, and the side close to the nose and mouth should be folded inward. Do not put it into the pocket or hang it around the neck