With increasing of pollutants and airborne infected particles as well as respiratory infection such as influenza and Covid-19, use mask to blocking the entrance of air pollution and pathogens from breathing ways become a necessity.
Respiratory masks are made with several non-woven layers consisting of Spun bond, SMS and Melt blown that mainly made of woven polypropylene fibers. Melt blown and SMS layer play the main role in air filtering from suspended particles and dust and spun bond is the protector of middle layers in mask.
Respirator are a kind of facepiece respirators that has meet the U.S. National Institute for Occupational Safety and Health (NIOSH).
N95, N99, and N100 with filtration ratio 0.95%, 0.99%, and 0.99.7% respectively can protect
the respiratory system against particulates bigger than 0.3 Micron but not against gases or vapors.
Respirators can use as a disposable face mask in medical departments and also in public.
Respirators are a type of protective mask certified by the European Union (EN149:2001) that serve to protect against particulates such as dust particles. FFP1, FFP2, and FFP3 respectively can Filter at least 80%, 94%, and 99% of airborne particles.