After 100 washes, the combination of materials still maintains a minimum efficiency of around 65% or more for all particle sizes between 20 nanometers (nm) to 2 micrometers (µm), which is the threshold recommended by the IRSST for manufacturing of barrier masks.
The pressure drop (resistance to flow) is greater than that of the reference material and is between the normative limits of level 1 and 2 masks. This mask also has a pressure drop in accordance with the recommendations of the IRSST for making barrier masks, ie, less than 11 Pa.s / cm.
LEARN MORE about the mask: IRSST notice
LEARN MORE about the IRSST’s material tests
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