In this time of
pandemic, the mask was recommended by the WHO as one of the different measures
that can limit the spread of the COVID-19.
At RX Solutions, as we
are specialized in x-ray computed tomography, we decided to investigate the inside
structure of a surgical mask. X-ray computed tomography technology is very
useful to inspect in a non-destructive way complex component, and inspect the
internal structures’ properties. In this case, the micro-structure &
filtration properties can easily be studied.
The scan was made with
an EasyTom XL Ultra 160-230, using the 160 kV x-ray tube to reach 1 µm
resolution. The mask scanned is designed
with three different layers. The triple thickness structure can easily be distinguished,
showing the layers made of different fibers sizes. As a complementary
study, we used a post-processing software called Volume Graphics to perform a
transport phenomena study. We simulated the passage of air though the mask.