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Mask Desinfection Ways

Machine generated alternative text: Can Facial Masks be Disinfected for Re-use? (Measurement results by 4C Air Inc.) Samples 700C hot air in oven, 30min UV light, 30min 75% alcohol, soaking and drying Chlorine-based disinfection, 5min Hot water vapor from boiling water, lomin Initial samples before treatment Meltblown fiber filtration Static-charged cotton media Filtration efficiency (%) 96.60 95.50 56.33 73.11 94.74 96.76 E. coli. Disinfection Efficiency Pressure drop (Pa) 8.00 7.00 7.67 9.00 8.00 8.33 Filtration efficiency (%) 70.16 77.72 29.24 57.33 77.65 78.01 Pressure drop (Pa) 4.67 6.00 5.33 7.00 7.00 5.33 Conclusions: DO NOT use alcohol and chlorine-based disinfection methods. These will remove the static charge in the microfibers in N95 facial masks, reducing filtration efficiency. In addition, chlorine also retains gas after de-contamination and these fumes may be harmful.

Text in image:Machine generated alternative text: Can Facial Masks be Disinfected for Re-use? (Measurement results by 4C Air Inc.) Samples 700C hot air in oven, 30min UV light, 30min 75% alcohol, soaking and drying Chlorine-based disinfection, 5min Hot water vapor from boiling water, lomin Initial samples before treatment Meltblown fiber filtration Static-charged cotton media Filtration efficiency (%) 96.60 95.50 56.33 73.11 94.74 96.76 E. coli. Disinfection Efficiency Pressure drop (Pa) 8.00 7.00 7.67 9.00 8.00 8.33 Filtration efficiency (%) 70.16 77.72 29.24 57.33 77.65 78.01 Pressure drop (Pa) 4.67 6.00 5.33 7.00 7.00 5.33 Conclusions: DO NOT use alcohol and chlorine-based disinfection methods. These will remove the static charge in the microfibers in N95 facial masks, reducing filtration efficiency. In addition, chlorine also retains gas after de-contamination and these fumes may be harmful.

 

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