What is medical protective face mask?
Medical protective masks are suitable for the protection of medical staff and related staff against air-borne infectious diseases. It is a kind of close-fitting self-priming filtering medical protective equipment with a high level of protection. It is especially suitable for exposure to air-borne infections in diagnosis and treatment activities. Or worn by patients with respiratory tract infections spread by droplets at close range. It can filter particles in the air and block droplets, blood, body fluids, secretions, etc. It is a disposable product. Medical protective masks can prevent most pathogens such as bacteria and viruses. The WHO recommends that medical workers use protective masks against particulates to prevent virus infection in the hospital air.
1) Filtration efficiency: Under the condition of air flow (85±2) L/min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter (0.24±0.06) μm is not less than 95%, which is in line with N95 ( Or FFP2) and above. It can block airborne infectious agents with a diameter of <5μm or close contact with infectious agents transmitted by droplets.
2) Inhalation resistance: Under the above flow conditions, the inhalation resistance does not exceed 343.2Pa (35mmH2O).
3) For samples sprayed on the mask under the pressure of 10.9Kpa (80mmHg), there should be no technical indicators such as penetration on the inside of the mask.
4) The mask must be equipped with a nose clip, which is made of bendable plastic material, and the length is >8.5cm.
5) The synthetic blood is sprayed on the mask sample at 10.7kPa (80mmHg) pressure, and there should be no penetration inside the mask.
