Disposable Medical Face Mask Manufacturers introduced that medical masks are professional protective masks worn in medical assistance, which can be divided into medical protective masks, medical surgical masks, and general medical masks.
1. Medical protective masks: The standard is that under the condition of airflow (85±2) L/min, the filtration efficiency of sodium chloride aerosol with median diameter of aerodynamic mass (0.24±0.06) μm is not less than 95%, That is, it meets the level of N95 and above, and needs to have three layers: inner, middle and outer. The mask must be equipped with a nose clip made of bendable plastic material, which can filter particles in the air, block droplets, blood, body fluids, and secretions, etc., for serious environmental pollution or sudden medical infection Wear during illness (such as respiratory infection);
2. Medical surgical masks: the standard is that under the condition of airflow (30±2) L/min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter (0.24±0.06) μm is not less than 30%; The filtration efficiency of bacteria is not less than 95%; the pressure difference between the two sides of the mask for gas exchange should not be greater than 49Pa; after 2ml of synthetic blood is sprayed to the outer side of the mask at a pressure of 16.0kPa (120mmHg), the inner side of the mask should not penetrate. To be worn on the nose and mouth of medical staff in the operating room;
3. Ordinary medical masks: The standard is supported by three layers of non-woven fabrics, which can block larger dust particles and absorb fine dust to achieve high dust blocking efficiency, which can be used for medical staff's diagnosis and treatment activities.