US 11,738,295 B2
Filter media including flame retardant fibers
Xiaodan Zhang, Nashua, NH (US); Douglas M. Guimond, Pepperell, MA (US); Carrie Liu, Hudson, MA (US); Nagendra Anantharamaiah, Mysore (IN); Sudhakar Jaganathan, Northborough, MA (US); Gerald Gadbois, Westfield, MA (US); Maxim Silin, Hudson, MA (US); and Mark A. Gallimore, Floyd, VA (US)
Assigned to Hollingsworth & Vose Company, East Walpole, MA (US)
Filed by Hollingsworth & Vose Company, East Walpole, MA (US)
Filed on Apr. 21, 2021, as Appl. No. 17/236,084.
Application 17/236,084 is a continuation of application No. 15/283,014, filed on Sep. 30, 2016, granted, now 11,014,030.
Application 15/283,014 is a continuation in part of application No. 15/045,538, filed on Feb. 17, 2016, granted, now 10,252,200.
Prior Publication US 2021/0236970 A1, Aug. 5, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 39/16 (2006.01); B01D 39/18 (2006.01); B01D 39/20 (2006.01); B01D 39/14 (2006.01)
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
OG exemplary drawing
 
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:

OG Complex Work Unit Math
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.