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Surgical masks conform to the standards and important technical indicators

by:Copper Plus     2021-01-16
Surgical masks conform to the standards and important technique index 1, medical protective mask GB19083 - are met 2003 standard for medical respirator technical requirements, the important technical indicators: (including non oily particle filtration efficiency and flow resistance 1) Filtration efficiency: in air flow ( 85±2) Under the condition of L/min, median diameter (dynamics of air 0. 24±0. 6) Microns of sodium chloride aerosol filtration efficiency of no less than 95%, which conform to the N95 ( Or FFP2) And above level. ( 2) Inspiratory resistance: under the condition of the flow, inspiratory resistance less than 343. 2Pa( 35mmH2O) 。 2, medical surgical masks in YY - 0469 2004 standard for medical surgical masks, technical requirements, major technical indexes including filtration efficiency, bacteria filtration efficiency and respiratory resistance: ( 1) Filtration efficiency: in air flow ( 30±2) Under the condition of L/min, median diameter (dynamics of air 0. 24±0. 6) Mu m sodium chloride aerosol filtration efficiency of no less than 30%; ( 2) Bacteria filtration efficiency: under prescribed conditions, the average particle diameter ( 3±0. 3) Mu m of staphylococcus aureus aerosol filtration efficiency of no less than 95%; ( 3) Breathing resistance: under the condition of the efficiency of filtering flow, inspiratory resistance less than 49 pa, expiratory resistance is not more than 29. 4Pa。 3, the common surgical masks in conformity with the relevant registration product standards ( YZB) , the general lack of particles and bacteria filtration efficiency requirements, or filtration efficiency requirements for particles and bacteria under medical surgical masks and medical protective mask. Masks the cleaning and maintenance of knowledge sharing to wear masks to note the correct way of using the item masks
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