3M Company
3M Company (Maplewood MN; NYSE: MMM; ~$23B revenue after Health Care spinoff; ~$35B before) is the dominant US manufacturer of N95 respirators and is vertically integrated into meltblown polypropylene nonwoven production. 3M manufactures its own electret (electrostatically charged) meltblown filtration media at its Arden Hills, MN facility — a rare example of vertical integration in nonwovens. 3M's N95 respirators (1860, 8210, 8110S) use proprietary Filtrete electret media. During COVID-19, 3M doubled N95 production to ~2 billion respirators/year (from ~1B) but could not scale meltblown capacity fast enough to meet demand — the Arden Hills facility was the binding constraint. 3M also sells Filtrete HVAC filter media (MERV 11-13) made from the same meltblown technology, generating ~$700M/year in home filtration revenue alongside its respirator business.