4 ms·
I wrote a blog post about one of the earlier studies in 2013 [see below]. HEPA filters can still be effective - the study doesn't talk about the charge of the
by flybrand 8y ago
I wrote a blog post about one of the earlier studies in 2013 [see below].
HEPA filters can still be effective - the study doesn't talk about the charge of the UFPs - and the 0.3 micron DoP particles used in HEPA testing are designed to be uncharged. It is common designing filter media to use charged media to attract small particles.
If you were running a 3D printer and concerned about this risk, I would suggest:
1/ Encapsulate the unit.
2/ Wear a mask when the enclosure is open.
3/ Ensure a steady flow of process air when running to prevent accumulation. You could also run at a negative pressure to keep USPs in the enclosure.
4/ Have a filter bank on the air outlet that you change out regularly. Pair a HEPA element with a highly charged media.
Link to 2013 blog post: https://fredlybrand.com/2013/10/19/filtration-in-the-popular-media-ultrafine-particles-and-3d-printing/ https://fredlybrand.com/2013/10/19/filtration-in-the-popular...