How about the filtration efficiency of medical face masks?

In daily life, we often choose to wear face masks. This is because increasingly serious environmental problems have bothered us. In order to have a healthy body and enjoy a better life, we have to wear masks. Everyone knows that the materials used are different depending on the place where they are used. Masks can also be divided into gauze masks, medical masks, disposable masks, etc. These are used to filter dust and bacteria in the air. Yes, how about the filtration efficiency of medical masks? Let's learn about it together.

Medical face masks, as important protective products, have complicated classifications, and their application scope and protective performance are also different. They mainly include medical protective masks, medical surgical masks and general medical masks. The "Regulations on Acute Respiratory Fever Patients" issued by the Ministry of Health in 2005 requires physicians to provide disposable surgical masks for patients with respiratory symptoms (nasal congestion, cough, etc.) and acute respiratory fever during the admission process to avoid Cross-infection. In addition, physicians in infectious disease departments and triage points need to take standard protective measures and need to wear medical protective masks. However, it is worrying that at present, some domestic medical face masks cannot provide good protection due to standards, quality processes, etc., and different types of medical masks have different protection functions. The protection efficiency of textile masks for small particles of aerosol is only 20%; the filtration efficiency of common 12-layer gauze masks is only 11% to 15%, which cannot completely block the penetration of artificial blood, Staphylococcus aureus and E. coli F2 phage; activated carbon The filtration mask has a filtration efficiency of 11% to 17%. It cannot block artificial blood penetration, but can block S. aureus and E. coli F2 phage penetration.