Restoring the filtration efficiency of N95 masks after they have been cleaned
Tuesday, September 8, 2020 - 10:20
in Physics & Chemistry
N95 masks are a critical part of the personal protective equipment used by front-line health care workers. These masks achieve 95% efficiency at filtering out tiny 0.3-micron particles, while maintaining reasonable breathability, thanks to a layer of fine melt-blown polypropylene fibers incorporating electrical charges to attract particles.