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Old 11-04-2015, 02:38 AM   #1
gsgs
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Default nose-filters

I got mine today, just an 1cm^2 oval filter with a ~3mm outer
layer of adhesive tape to be glued to each nostril.
Hardly seen by others. Glasses, beard = no problem.
I'll post a picture later.
There is still some breathing resistance and the filters bend in and out
on breathing.
They hold pretty tight when applied correctly, although the shape is not
exactly the shape of my nostril.
They claim that they filter particles greater than 10 micrometers,
so mainly for allergies, dust, smoke. But they claim they also work
for bacteria, even viruses (droplets).
A flu virus is 0.1 micrometer in diameter.

I can imagine that they may increase the surface of these
by bending it like Zieharmonika.
I don't know, whether N95 is possible this way


https://flutrackers.com/forum/forum/...-in-nose-masks


http://magictour.free.fr/nosemask.gif

why those islands ? doesn't make sense to me.
I mean, either the island-material is better or the other material,
don't mix !
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Last edited by gsgs; 11-04-2015 at 05:42 AM.
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Old 11-04-2015, 07:57 AM   #2
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I found several other types.
Famous is "Breath-Ezy", we discussed this in the flu forums years ago.
"Air Travel" supped to protect from viruses, uses 3M-material, but probably
only one small layer of them.None of these are NIOSH approved.
Would it be possible to make a nose-mask from extra fine fibers ?
I assume, yes. But too expensive.
https://en.wikipedia.org/wiki/Nanofiber

http://aaqr.org/VOL15_No6_November20..._2422-2435.pdf
As the effectiveness of the separation grew with a decrease in diameter of filter fibers,
a filter composed of nanoscale fibers proved to be the most effective.

The melt-blown technology facilitates
manufacturing large quantities of fibers at reduced cost,
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