J Appropr Technol > Volume 6(2); 2020 > Article
Journal of Appropriate Technology 2020;6(2):226-237.
DOI: https://doi.org/10.37675/jap.2020.6.2.226    Published online November 30, 2020.
3D-printed Face Shields for Healthcare Professionals Battling COVID-19 Pandemic
Gyeong-Man Kim1, Dawit Assefa1, Joon Wun Kang2, Esayas Gebreyouhannes3
1Center of Biomedical Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia
2Environmental Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia
3School of Civil and Environmental Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia 
Correspondence:  Gyeong-Man Kim, Email: gmkim111@gmail.com
Received: 20 August 2020   • Revised: 7 November 2020   • Accepted: 10 November 2020
As the number of reported COVID-19 cases rises around the world, regions affected by the virus are taking serious measures to contain its spread. Face shields are one of the highest-need personal protective equipment (PPE) during COVID19 pandemic. Beyond traditional face masks, as known cases of the coronavirus soar, currently there is a significant shortage of face shields around the world. In response, the protective face shields were designed and fabricated with opensource 3D modelling software and 3D printing technology, respectively.
Our face shield consisted of two parts only; a reusable 3D printed headband and a visor made of transparent plastic sheet, as barrier. The resulting 3D printed face shields are affordable, lightweight, one-size-fits-most and ready-to-wear with minimal assemblies, and go on easily over glass, goggle and face mask. To ensure being donated to the healthcare professionals without risk infected by any pathogens, the 3D printed face shields were successfully be disinfected with ultraviolet germicidal irradiation (UVGI dosage of 1000 mJ/cm2 ) and 70% alcohol. For routine disinfection a UVGI chamber was designed and optimized to provide uniform UV-C illumination with an appreciated fluence for complete decontamination. More than 1,000 face shields were produced already and donated to the special hospitals for COVID-19 patients, quarantines, government and medical agencies in Ethiopia as well as in East-African countries. With certainty, our intention goes beyond the hospitals and other first responders, but not limited for all those who have to stay in the service or be in contact with many other people in the time of COVID-19 pandemic.
Key Words: COVID-19, disinfection chamber, headbands, 3D printed face shield, UVGI, visors
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