pone.0258191.g009.tif (298.61 kB)
Protection performance results for the five mask groups; fabric 2-layer masks (2-L), multi-layer masks (M-L), disposable procedure masks (PMs), KN95 masks and N95 FFRs.
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posted on 2021-10-06, 17:43 authored by Scott Duncan, Paul Bodurtha, Syed NaqviTILPF—total inward leakage protection factor. FPF—fabric protection factor (overall protection of fabric material against entire particle size distribution). FF—fit factor (total inward leakage measured through face seal only (by QNFT). Sample sizes: n = 8 to 26 for TILPF; n = 6 to 20 for FPF; and; n = 30 for FF. The geometric mean is shown by the square marker.
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study five groupsstanding position conversinghigh risk settingsface seal leakageexperimental work focussedoverall filtration efficiencieshigher filtration efficiencyhigh filtration efficiencybreathing expiration ratemask quality factormask group investigateddisposable procedure masksdisposable proceduren95 groupflow ratemask systemmask performancemask materialsprocedure maskssurgical masksrespiratory illnessesprotective performanceprotect individualsprospective productsparticular relevanceparticle penetrationparticle diametern95 respiratorsn95 ffrsmaterials usedmarginally improvedkey componentimpartial authoritieshighly recommendedhighest valuesfabric twocloth masksbest optionsbest optionanother individual17 l
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