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US 11,998,040 B2Granted
Non-combustible wrapper for use in heat but not burn applications
AssigneeSWM Holdings US, LLC
InventorsBruno Stefani, Lanig Le Bec
Life of this patent
Estimating the term…
Abstract
A paper well suited for use as a wrapper in heat but not burn sticks is disclosed. The paper includes a base web made from cellulosic fibers combined with a flame retardant filler and/or can include a coating formed from a reduced ignition composition.
Claims23
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.
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 kaolin particles or metal hydroxide 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.
A wrapper for a heat but not burn stick comprising:
- a base web comprising cellulosic fibers, the base web having a first side and a second and opposite side;
- and
- a continuous coating disposed on the first side of the base web, the coating comprising a reduced ignition composition, the reduced ignition composition comprising a polymer material, a cellulose material, or mixtures thereof, the base web having a permeability where coated with the reduced ignition composition of less than about 5 CU and having a diffusivity of less than 0.04 cm/s as determined by a CO2 diffusivity tester, the first side of the base web having a surface area and wherein the reduced ignition composition covers greater than about 40% of the surface area of the first side of the base web.
Dependencies are inferred from the claim text.