Alliance for Pandemic Preparedness

May 5, 2020

Effect of Ethanol Cleaning on the Permeability of FFP2 Mask

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  • The effect of ethanol on the filtering properties of FFP2 masks was tested.  The filtering properties of a mask are related to the size and tortuosity of the pores of the filter and are quantified by its permeability; damage to the filter will change its permeability.  After six cleaning cycles, the permeability remains very close to the permeability before cleaning, suggesting that ethanol could be used to sanitize a FFP2 mask without significantly altering its filtering properties.  

Lenormand. (May 5a, 2020). Effect of Ethanol Cleaning on the Permeability of FFP2 Mask. Preprint downloaded May 5 from Medrxiv. https://doi.org/10.1101/2020.04.28.20083840