What's the Deal with those PM2.5 Filters?
Jul, 28 , 20
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Stacey Malo
I wish those filters would be banned from the marketplace. They give people a false sense of security and therefore may put more people more at risk.
They are not certified by a lab. A Chinese manufacturer used a stamp on this cut material, but there is zero lab certification of these products or the packaging. It's all a sham.
There is zero regulation of this stuff in China. Who knows what's in this product and what the effect is. No one is regulating. Don't trust it.
Activated carbon works to filter microparticles. There is not enough activated carbon in these filter products to actually be of any benefit. Again, there's no lab certification or ingredients list on these things. Fraud.
How Nano-Fibers Work for Air Filtration
May, 30 , 20
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Stacey Malo
Particulate matter at .3 microns is the most difficult to capture. The COVID-19 virus, at roughly .01 microns, is easier to capture due to electrostatic charge or Browning Diffusion (see first graphic above) than the larger particle. Air filtration (such as N95 and N99) is measured against the percentage to capture .3 microns. For instance, an N95 face mask is 95% effective in capturing .3 microns. Capturing this exact particle size is the gold standard of mask filtration. Larger than .3 and smaller than .3 microns are less worrisome as there is an even higher capacity to capture those sized microns (including a virus at .1 microns). The main benefit of electrospun nano-fiber filtration is the high efficiency of filtration with low pressure drop (breathing resistance). An effective product, comfortable to wear.
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