How 3M Plans to Make More Than a Billion Masks By End of Year
bloomberg.com
The company is using “surge capacity” to increase the production of N95 masks to fight the pandemic. Localized supply chains are a secret weapon, too.
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The N95 respirator is so named because, worn properly, it blocks at least 95% of airborne particles from entering a wearer’s mouth and nose, while still allowing respiration through the microscopically porous shell. This design protects a person from medical and other hazards; flimsier, looser-fitting surgical masks are intended to prevent the wearer from infecting others with expelled mucus, blood, or spit.
3M makes about two dozen versions of the N95, for different industrial and medical purposes. Generally they’re constructed from nonwoven materials—infinitesimal plastic strands blown together to form a random thicket that, under a microscope, “is going to look like pickup sticks,” says Nikki McCullough, 3M’s global leader for occupational health and safety. “If you’re a submicron particle, it’s quite the journey through there.” The filters can block invaders as small as 0.3 microns, or about 1/100th the thickness of a human hair. The virus is smaller than that, at about 0.125 microns, but it often travels within larger particles when an infected person coughs or sneezes. |
