Permeability analysis of masks developed for biological emergency and disaster response: a laboratory study
DOI:
https://doi.org/10.12957/reuerj.2024.84058Keywords:
Coronavirus Infections, COVID-19, Personal Protective Equipment, Masks, SupplyAbstract
Objective: to analyze the air permeability of masks developed for biological emergency response. Method: laboratory study involving tests on cloth masks with a cellulose filter element (LisLu20®), produced during the COVID-19 pandemic, disposable surgical masks, PFF2/N95 masks, and homemade cotton masks. Analyses were conducted in May and June 2020, following ASTM D 737:2018 standards Results: six tests were conducted on ten units of each mask. LisLu20® (a) - two layers: 8.6 cm³/s/cm²; LisLu20® (b) - three layers, Asian style: 6.2 cm³/s/cm²; LisLu20® (c) - three layers, PFF2/N95 style: 4.8 cm³/s/cm²; Disposable surgical mask: 18.0 cm³/s/cm²; PFF2/N95 mask: 10.2 cm³/s/cm²; Cotton knit mask: 31.1 cm³/s/cm². Conclusion: LisLu20® masks provided a physical barrier and served as a Preventive method to reduce respiratory infection risks. As a low cost, sustainable domestic product, they offered complementary emergency support to mitigate the shortage of disposable surgical masks.
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