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Original Title: Comparison of Standard Requirements and Key Technical Indicators of Medical Masks in Countries Around the World Masks can be roughly divided into medical masks and protective masks, and the main function of protective masks is to prevent dust, which is also the type of masks we contact more in our daily life, such as ordinary N95, KN95 and other types of masks. On the basis of dust masks, medical masks also put forward requirements to prevent liquid penetration. That is to say, ordinary N95, KN95 and other series of masks are not medical, to indicate that "medical" is a medical mask. In order to give full play to the service value of the standard and help enterprises understand the standards of masks at home and abroad, we have collected and collated the standards of medical masks among the United States,KN95 Mask for Epidemic Prevention and Control, the European Union and BRICS countries, and compared the key performance indicators. Main index parameters involved in medical mask A) Particle filtration efficiency: particle filtration efficiency under certain airflow B) Bacterial filtration efficiency: the effectiveness of the surgical mask in filtering aerosols containing bacteria -Select a certain concentration of Staphylococcus aureus, the bacterial size is 3 ± 0.3 microns. C) Airflow resistance: the pressure difference on both sides of the filter layer of the mask under a certain airflow Generally, the particle filtration efficiency is high, which will increase the airflow resistance and reduce the wearing comfort. D) Penetration of synthetic blood: spray 2ml of synthetic blood to the outer surface of the mask under a certain pressure,KN95 Face Mask, and there shall be no penetration inside the mask. — — The viscosity and surface tension of synthetic blood are specified. In terms of size, the particle size of bacteria was equal to or larger than that of latex spheres, and the particle size of NaCl particles was equal to or larger than that of viruses. From the point of view of medical protection, medical masks should have high bacterial and particle filtration efficiency, high resistance to synthetic blood permeability, and comfortable air permeability. When choosing masks, we should not only look at the technical indicators, Against Bacteria Breathable KN95 Face Mask ,Full Body Disposable Coverall, but also pay attention to the test methods. Key performance indicators of technical standards for medical masks I. China GB 19083-2010 Technical Requirements for Medical Protective Masks II.  simple, fast, time-saving and worry-saving" global laboratory brand management expert,Antivirus Disposable Mask with CE Certificate, Wilson Laboratory Management Expert has 50 + years of experience in laboratory management and product testing and certification of epidemic prevention materials, and has urgently handled CE/FDA product certification and CNAS product certification for many protective materials enterprises. If you have any product certification needs, you can contact "Wilson Laboratory Management Experts" at any time. Return to Sohu to see more Responsible Editor:. zjyuan-group.com

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