
Particles having aerodynamic diameters
smaller then about five microns are the greatest health hazard contained in airborne
dust. Most air filter textile fibers are about twenty microns in diameter, and they
are not very effective in the capture of fine respisable particles. To be effective,
a filter must be either very fine in fiber diameter or "electrostatically
charged". While fine fiber filters have a high mechanical efficiency they may,
under certain circumstances, be shed and breathed in, creating a HEALTH HAZARD.
Filters made from coarser electrically charged fiber eliminate this problem.
|