Month: January 2021

Improving Mask Fit and Seal

As the pandemic progresses, more attention is being paid to incorporating design features that improve mask fit. To maximize the benefits of these design features, masks need to be put on (donned) and taken off (doffed) using techniques that people outside of the healthcare industries may not be as familiar with. In this post we […]

Mask Material Testing Plan

Update (February 12, 2021): Thanks to our generous community and a grant from Helpful Engineering, we exceeded our fundraising goal for mask testing!  In addition to the originally planned fluid resistance, breathability, and bacterial filtration testing of our fabric combinations, we were able to add mask-level NaCl aerosol filtration tests to our campaign. Thank you […]

Common Approaches to Increasing Seam Strength

Mask Math/Science Vignette: Mask Straps According to the guidance released by the WHO in December mask straps should be designed to withstand at least 10 lbs of force ( 44.5 Newtons). The materials that most straps are constructed from (e.g., cotton straps and silicone bands) easily meet these requirements. However, we’ve seen a number of […]

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