Classification of protective masks

In our daily life, protective masks are often used as respiratory protective equipment, which can prevent respiratory tract from being infected by microorganisms, so as to achieve the purpose of protecting human health. Do you know how to classify protective masks? What's the difference between the masks we use in our daily life?

Protective mask in daily life is more common is the daily protective mask, its mask body is the filter material wearer, is to rely on breathing to overcome the resistance of the filter material to the air flow, so it is also known as the self-priming filter respirator. In the process of breathing, the low pressure inside the mask will make the air flow into the mask. When exhaling, because the pressure inside the mask is much higher than the ambient pressure, the air flow can be discharged through the mask.

When the filter material used in the mask meets the relevant standards, the mask can not fit the user's face enough, so most of the air flow will be filtered out through the filter material, but the protective material used in daily life can not fit the face completely, Because it has a direct impact on the smoothness of the human face and whether there is hair pad under the mask. However, most of the particles inhaled by wearing the daily protective mask come from leakage, so whether the daily protective mask fits or not is the key to ensure whether the filter material can play an important role. In order to reduce the leakage of the protective mask, the three-dimensional structure is adopted in the design, and the pressure is exerted by the headwear and wallet, so that the mask and the face can be closely fitted together.

Daily protective masks can be divided into dust masks and gas masks. The main function of dust masks is to prevent harmful dust aerosols from entering the human respiratory tract. Most of the dust masks are cup-shaped, which can effectively fit in the mouth and nose of the human body, so as to achieve the effect of dust prevention. They are used to block the dust or exhaust gas in the air, But it can't get rid of the germs in the air, and the anti-virus mask is a kind of protective equipment to prevent the respiratory organs from being injured by microorganisms or radioactive dust.

The protective mask often used in hospitals is medical protective mask, which is composed of mask face and tension band. The mask part is divided into three layers, namely inner layer and outer layer. The inner layer is made of non-woven cloth or ordinary sanitary gauze, while the middle layer is made of ultra-fine polypropylene fiber material, while the outer layer is made of non-woven cloth. This kind of protective mask has strong air permeability and obvious filtering effect on some powerful aerosol or dust with micro virus.