COVID-19 - Mask
Description
IMPORTANT DISCLAIMER ===================== This mask has been created / remixed as part of a private project. It is not certified / proven to be safe & effective wrt Corona virus particles! Use / modify / ignore it on your own risk! THIS IS A REMIX OF THE FOLLOWING AWESOME DESIGNS ------------------------------------------------------------------------------------- [1] COVID-19 MASK (Easy-to-print, no support, filter required) by lafactoria3d -> https://www.thingiverse.com/thing:4225667 [2] Flexible Mask Valvy by iczfirz -> https://www.thingiverse.com/thing:4177128 IN ADDITION I DESIGNED SOME FILTER & VALVE ADAPTER WITH TINKERCAD ------------------------------------------------------ -> https://www.tinkercad.com/things/hfSTDLxLgKG Some thoughts I had when developing this Mask ------------------------------------------------------ I wanted a Mask - which is not made from paper - and as such lasts longer (as it can be cleaned / desinfected) - has a valve system, so that the moist exhaled air is not passed through the filters again (which increases the life of the filters enormously) - and actually works wrt to filtering. Therefore I was inspired by - https://www.emw.de/de/filter-campus/filterklassen.html - https://wlf-luftfilter.de/wp-content/uploads/2016/05/partikel11.jpg -http://www.fs-journal.de/Schwerpunktthemen/2015/deutsch/11_Die-neue-ISO-16890-zur-Prüfung-von-Luftfiltern.pdf I am actually assuming, that - my anti-pollen window protection tile has Filter Class: F7 - my MicroFiltPlus vacuum cleaner bag cuts have Filter Class: E10 ... and if I am terrible wrong ... shit happens ;) The intention was to find working / effective filter materials, which are not sold as breath masks (they are sold out anyhow), but are available for small money or already existing in every household. ADDITIONAL MATERIALS I USED ========================== - Self-adhesive rubber sealing tape (for windows & doors) to seal the mask to the face - A latex fitness tape (1mm thick) to manufacture valve membranes (30mm diameter) - Common household thread for sewing the valves - UHU all-purpose adhesive to secure the knots (of the sewn valves) - UHU hard to glue the adapter to the mask - Hot glue to additionally glue the adapter to the mask - For optional sealing of the surface: polyurethane gloss varnish - household rubbers (120mm) And for the self made filter ------------------------------------ - 6 layers of an anti-pollen window protection tile - 8mm activated carbon mat - 2 layers of MicroFiltPlus vacuum cleaner bag cuts (Siemens SI 200) - 1 layer of FFP2 Paper Mask (1 Mask -> Fits for 4 Filters!) PRINTING HINTS ============== - All parts can be printed without support - Except my "Mask - Adapter". It needs a little support POST PRINTING & ASSEMBLY ======================== 1. Sand all your parts (as you like)if necessary at all) 2. Cut out the valve membranes and the associated sealing rings from the latex fitness tape 3. Glue the sealing rings into the adapter -> Wait 4. Sew in and the valve membranes (30mm round) into the 3 valve opening. For the exit outside for the two inlets inside 5. Secure the valve seams / knots with UHU 6. Glue the adapter together with the mask (first with UHU Hart, then with hot glue) 7. Put on and fix (with 2 drops of UHU) the outlet cap 8. Attach two household rubbers 9. Glue the window rubber seal into the mask 10. Assemble each of the two filters as follows - Wrap the activated carbon mat into several layers of the anti-pollen window protection tile and put it into the Filter Cover - Then add two layers of MicroFiltPlus vacuum cleaner bag cuts - As I had still some FFP2 Paper Masks, I ended up this stack with one laver of that too 11. Assemble the 2 Filters and the Mask 12. OPTIONAL: Glue all together 13. OPTIONAL: Painting the entire mask with polyurethane gloss varnish -> which increases the tightness again and makes it easier to wash or disinfect the mask
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