Effect of Melt-Blown (MB) filter fibers of facial masks on lung tissues

  • Medical
  • Thread starter Shinyoung Noh
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Summary:

I heard Asbestos or rockwool(?) is cancer causing material since its fiber is too thin (<3um),
I also heard glass wool is still safe to use since its fiber is thick(>4um)

Then I see some high-grade facial masks which has <3um thin fibers for filtration and they are sticked to the noses to be used.
How is it safer compared to Asbestos ?

Main Question or Discussion Point

I came up with a curiosity whether having a facial mask on face to breathe can actually be safe to lungs in the following aspect.

I remember when I was young, Asbestos was so popularly used in construction.
and now, people wear Hazmat suits to remove any remaining Asbestos since it is first-class(?) cancer causing material.
I heard Asbestos is harmful because the fiber is too thin, makes fine dusts which gets into lungs, never gets digested, causes inflammation which ends up being a cancer.
I also heard glass wool is still used and is safe because its fiber is thick (>5um), does not make fine dusts floating around in the air, therefore,never gets into lungs.

Then, I see many high-grade facial mask products emphasizing upto how small particles they can filter.
One of the commercial I saw was saying their mask can filter max-level fine dust since their filter's fiber is ~0.1 um.

I see most of facial masks uses Melt-Blown(MB) filters which is similar or the same process of making Asbestos and glass wools.

Then, I do not see how it can be safe to be place right on the nose to inhale.
 
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