Aerosol-generating article comprising a flame-retardant

Abstract

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the aerosol-generating article including: a rod of aerosol-generating substrate, the aerosol-generating substrate including at least an aerosol-former, in which the aerosol-generating substrate has an aerosol former content of at least about 10 percent on a dry weight basis; a downstream section at a location downstream of the rod of aerosol-generating substrate; and a wrapper circumscribing at least the rod of aerosol-generating substrate, in which a density of the aerosol-generating substrate is greater than about 300 milligrams per cubic centimeter, and in which the wrapper includes a flame retardant composition including one or more flame retardant compounds. A method of manufacturing an aerosol-generating article for generating an inhalable aerosol upon heating is also provided. An aerosol-generating system including an electrically operated aerosol-generating device and an aerosol-generating article is also provided.

1 - 17 . (canceled) 
     
     
         18 . An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:
 a rod of aerosol-generating substrate, the aerosol-generating substrate comprising at least an aerosol-former, wherein the aerosol-generating substrate has an aerosol former content of at least about 10 percent on a dry weight basis;   a downstream section at a location downstream of the rod of aerosol-generating substrate; and   a wrapper circumscribing at least the rod of aerosol-generating substrate,   wherein a density of the aerosol-generating substrate is greater than about 300 milligrams per cubic centimeter, and   wherein the wrapper comprises a flame retardant composition comprising one or more flame retardant compounds.   
     
     
         19 . The aerosol-generating article according to  claim 18 , wherein a density of the aerosol-generating substrate is greater than about 350 milligrams per cubic centimeter. 
     
     
         20 . The aerosol-generating article according to  claim 18 , wherein a density of the aerosol-generating substrate is greater than about 400 milligrams per cubic centimeter. 
     
     
         21 . The aerosol-generating article according to  claim 18 , wherein the rod of aerosol-generating substrate comprises a gathered sheet of homogenised tobacco material. 
     
     
         22 . The aerosol-generating article according to  claim 18 , wherein the rod of aerosol-generating substrate comprises a gel composition, the gel composition comprising at least one gelling agent, at least one of an alkaloid compound and a cannabinoid compound, and an aerosol former. 
     
     
         23 . The aerosol-generating article according to  claim 18 , wherein the rod of aerosol-generating substrate comprises a susceptor element arranged within the aerosol-generating substrate. 
     
     
         24 . The aerosol-generating article according to  claim 18 , wherein the wrapper further comprises a wrapping base material and a layer comprising the flame retardant composition provided on a surface of the wrapping base material facing the aerosol-generating substrate, a surface of the wrapping base material facing away from the aerosol-generating substrate, or both. 
     
     
         25 . The aerosol-generating article according to  claim 18 , wherein the flame retardant composition further comprises a polymer and a mixed salt based on at least one mono, di- and/or tri-carboxylic acid, at least one polyphosphoric, pyrophosphoric, and/or phosphoric acid, and a hydroxide or a salt of an alkali or an alkaline earth metal, where the at least one mono, di- and/or tri-carboxylic acid and the hydroxide or salt form a carboxylate and the at least one polyphosphoric, pyrophosphoric, and/or phosphoric acid and the hydroxide or salt form a phosphate. 
     
     
         26 . The aerosol-generating article according to  claim 25 , wherein the flame retardant composition further comprises a carbonate of an alkali or an alkaline earth metal. 
     
     
         27 . The aerosol-generating article according to  claim 18 , wherein the flame retardant composition comprises cellulose modified with at least one C 10  or higher fatty acid, tall oil fatty acid (TOFA), phosphorylated linseed oil, phosphorylated downstream corn oil. 
     
     
         28 . The aerosol-generating article according to  claim 18 , wherein the rod of aerosol-generating substrate has a length of less than about 40 millimeters. 
     
     
         29 . The aerosol-generating article according to  claim 18 , wherein the rod of aerosol-generating substrate has a length of at least about 10 millimeters. 
     
     
         30 . The aerosol-generating article according to  claim 18 , wherein an overall length of the aerosol-generating article is less than about 70 millimeters. 
     
     
         31 . The aerosol-generating article according to  claim 18 , wherein the wrapper does not comprise metal. 
     
     
         32 . A method of manufacturing an aerosol-generating article for generating an inhalable aerosol upon heating, the method comprising:
 providing a continuous rod of aerosol-generating substrate, wherein a density of the aerosol-generating substrate is greater than about 300 milligrams per cubic centimeter, the aerosol-generating substrate comprises at least an aerosol-former, and the aerosol-generating substrate has an aerosol former content of at least about 10 percent on a dry weight basis;   circumscribing the continuous rod of aerosol-generating substrate with a wrapper comprising a flame retardant composition comprising one or more flame retardant compounds; and   cutting the circumscribed continuous rod into discrete rods, each discrete rod being circumscribed by a portion of the wrapper comprising the flame retardant composition.   
     
     
         33 . The method according to  claim 32 , wherein a layer of the flame retardant composition is applied onto at least one side of a wrapping base material of the wrapper by an application process based on size pressing, spraying, printing, or coating. 
     
     
         34 . An aerosol-generating system comprising an electrically operated aerosol-generating device and an aerosol-generating article according to  claim 18 , the aerosol-generating device comprising means for heating the rod of aerosol-generating substrate to a temperature sufficient to generate an aerosol from the aerosol-generating substrate.