US 11,998,040 B2
Non-combustible wrapper for use in heat but not burn applications
Bruno Stefani, Le Mans (FR); and Lanig Le Bec, Tregunc (FR)
Assigned to SWM Holdings US, LLC, Alpharetta, GA (US)
Filed by Schweitzer-Mauduit International, Inc., Alpharetta, GA (US)
Filed on Apr. 7, 2021, as Appl. No. 17/224,783.
Claims priority of provisional application 63/006,576, filed on Apr. 7, 2020.
Prior Publication US 2021/0307381 A1, Oct. 7, 2021
Int. Cl. A24D 1/20 (2020.01); A24D 1/02 (2006.01); D21H 17/67 (2006.01); D21H 17/68 (2006.01); D21H 19/10 (2006.01); D21H 21/34 (2006.01); D21H 21/52 (2006.01)
CPC A24D 1/20 (2020.01) [A24D 1/02 (2013.01); D21H 17/675 (2013.01); D21H 17/68 (2013.01); D21H 19/10 (2013.01); D21H 21/34 (2013.01); D21H 21/52 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A wrapper for a heat but not burn stick comprising:
a base web comprising cellulosic fibers combined with a flame retardant filler, the base web having a first side and a second and opposite side, the flame retardant filler comprising metal silicate particles, the metal silicate particles comprising greater than about 15% by weight of the base web and comprising less than 35% by weight of the base web; and
a coating disposed on the first side of the base web, the coating comprising a reduced ignition composition.