US 12,201,142 B2
Filter for smoking or vaping article comprising a nonwoven substrate
Oxana Cherkas, Le Mans (FR); and Diane M. Raverdy-Lambert, Le Mans (FR)
Assigned to SWM Holdings US, LLC, Atlanta, GA (US)
Filed by SWM Holdings US, LLC, Alpharetta, GA (US)
Filed on Sep. 10, 2021, as Appl. No. 17/471,497.
Claims priority of application No. 20 09244 (FR), filed on Sep. 11, 2020.
Prior Publication US 2022/0079216 A1, Mar. 17, 2022
Int. Cl. A24D 3/10 (2006.01); A24D 1/04 (2006.01); A24D 1/20 (2020.01); A24D 3/02 (2006.01); A24D 3/06 (2006.01); A24D 3/14 (2006.01); A24D 3/17 (2020.01)
CPC A24D 3/10 (2013.01) [A24D 1/045 (2013.01); A24D 1/20 (2020.01); A24D 3/022 (2013.01); A24D 3/0229 (2013.01); A24D 3/0254 (2013.01); A24D 3/063 (2013.01); A24D 3/14 (2013.01); A24D 3/17 (2020.01)] 16 Claims
 
1. A filter comprising a nonwoven substrate comprising natural fibers and a binder,
in which the natural fibers represent from 70% to 99% by weight of solids of said nonwoven substrate, the natural fibers being wood fibers chosen from hardwood pulp, bleached hardwood pulp, softwood pulp, bleached softwood pulp, softwood fluff pulp, and mixtures thereof, the binder represents from 1% to 30% by weight of solids of said nonwoven substrate,
characterized in that the nonwoven substrate has a density of from 10 mg/cm3 to 60 mg/cm3.