CPC B01D 39/163 (2013.01) [B01D 39/14 (2013.01); B01D 39/1615 (2013.01); B01D 39/18 (2013.01); B01D 39/2089 (2013.01); B01D 2239/0216 (2013.01); B01D 2239/1225 (2013.01); B01D 2239/1258 (2013.01); B01D 2239/1291 (2013.01)] | 18 Claims |
1. A filter media, comprising:
a flame retardant wet-laid nonwoven web comprising fibers comprising a phosphorus-based flame retardant, wherein the surface average fiber diameter (SAFD) of the flame retardant wet-laid nonwoven web is greater than or equal to about 1 micron and less than or equal to about 25 microns and is measured using the formula:
wherein SSA is the BET surface area of the flame retardant wet-laid nonwoven web in m2/g and ρ is the density of the flame retardant wet-laid nonwoven web in g/cm3.
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