mask science

Masks for COVID: Literature Highlights

In this post we share some of our favorite articles about mask science. Since the beginning of this pandemic over 6000 papers have been published on masks. For scientists and sewists alike, sorting through all this information can be daunting! We have gathered our top recommendations for those looking to join us in immersing themselves […]

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 […]

Breathable Masks: Testing Results

Key result: Quantitative testing shows that fabric masks constructed from spunbond nonwoven polypropylene (NWPP) and/or quilting cotton are breathable and can satisfy NIOSH criteria for breathability. Ready for more testing?  Visit our MakerMask Lab Testing Campaign for details. Introduction: Breathable Masks Breathing isn’t optional, and as COVID continues and mask wearing becomes commonplace, we are […]

Fluid Resistance: Mask Material Test Results

New test results show that upcycled spunbond nonwoven polypropylene (NWPP) mask materials can provide high-level (ASTM Level 2) fluid resistance. MakerMask has supported the use of spunbond NWPP in homemade mask designs because of its unique combination of breathability and hydrophobicity, or water resistance. Thanks to community contributions, we were able to put the fluid […]

Face Masks for COVID-19: Background Information

El equipo del proyecto MakerMask ha revisto literature extensiva sobre la ciencia y fabricación de respiradores aprobados por NIOSH. Selecionamos un diseño de múlitples capas que balance capacidades de filtración aumentado con permeabilidad para respirar. Las capas exteriores de polipropileno no tejido (PPNT) spunbond usan el mismo tipo de material usado en máscaras comerciales de grado médico, proveendo resistencia al agua para bloquear transmisión de gotitas y filtración mecánica por la estructura de las fibras.

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