WO2024089276A1 - Article de génération d'aérosol comprenant une capsule - Google Patents

Article de génération d'aérosol comprenant une capsule Download PDF

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Publication number
WO2024089276A1
WO2024089276A1 PCT/EP2023/080148 EP2023080148W WO2024089276A1 WO 2024089276 A1 WO2024089276 A1 WO 2024089276A1 EP 2023080148 W EP2023080148 W EP 2023080148W WO 2024089276 A1 WO2024089276 A1 WO 2024089276A1
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WO
WIPO (PCT)
Prior art keywords
aerosol
capsule
percent
millimetres
generating
Prior art date
Application number
PCT/EP2023/080148
Other languages
English (en)
Inventor
Jerome Uthurry
Original Assignee
Philip Morris Products S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philip Morris Products S.A. filed Critical Philip Morris Products S.A.
Publication of WO2024089276A1 publication Critical patent/WO2024089276A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/283—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by encapsulation of the chemical substances
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/186—Treatment of tobacco products or tobacco substitutes by coating with a coating composition, encapsulation of tobacco particles
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • the present invention relates to an aerosol-generating article comprising an aerosolgenerating substrate and adapted to produce an inhalable aerosol upon heating.
  • the present invention also relates to an aerosol-generating system comprising an aerosol-generating article, and methods of manufacturing a capsule.
  • Aerosol-generating articles in which an aerosol-generating substrate, such as a tobaccocontaining substrate, is heated rather than combusted, are known in the art.
  • an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which may be located in contact with, within, around, or downstream of the heat source.
  • volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.
  • a number of prior art documents disclose aerosol-generating devices for consuming aerosol-generating articles.
  • Such devices include, for example, electrically heated aerosolgenerating devices in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating device to the aerosol-generating substrate of a heated aerosol-generating article.
  • electrically heated aerosol-generating devices have been proposed that comprise an internal heater blade which is adapted to be inserted into the aerosol-generating substrate.
  • WO 2020/1 15151 describes the provision of one or more heating elements arranged around the periphery of the aerosol-generating article when the aerosol-generating article is received in a cavity of the aerosol-generating device.
  • inductively heatable aerosol-generating articles comprising an aerosol-generating substrate and a susceptor arranged within the aerosol-generating substrate have been proposed in WO 2015/176898.
  • Certain types of aerosol-generating substrates containing nicotine and a relatively high aerosol former content are known, for example, nicotine containing gels and films. Such substrates are typically very stable during storage and advantageously provide a very consistent delivery of nicotine to the consumer upon heating. They can also advantageously generate aerosol at a lower temperature than other solid substrates.
  • the relatively high aerosol former content increases the risk of leakage of aerosol former from the substrate during storage as well as during use.
  • certain substrates such as gel compositions will commonly melt upon heating of the aerosol-generating substrate within an aerosol-generating device during use.
  • the viscosity of the gel composition therefore increases significantly and it can become more difficult to control the movement of the gel composition and in particular, to retain it within the aerosolgenerating article.
  • the leakage of aerosol former or melted gel composition from the aerosolgenerating article is undesirable, since it can leak into the heating chamber of the aerosolgenerating device and potentially contaminate the aerosol-generating device.
  • the leakage of aerosol former or gel composition may also be potentially unpleasant for the consumer.
  • Another issue may arise when the aerosol-generating article is heated by an external heating system, such as one or more heating elements arranged around the periphery of the aerosol-generating article, there may be a short delay following the actuation of the heater until the aerosol-generating substrate is heated sufficiently to generate aerosol.
  • an internal heating system such as an internal heater blade inserted into the aerosol-generating substrate, there may be a decrease in aerosol generation as the aerosolgenerating substrate is depleted.
  • the present disclosure relates to an aerosol-generating article for generating an inhalable aerosol upon heating.
  • the aerosol-generating article may comprise a capsule.
  • the capsule may comprise a capsule outer wall defining an internal cavity.
  • the capsule may comprise a first aerosol-generating substrate within the internal cavity of the capsule.
  • the capsule may comprise at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall.
  • an aerosol-generating article for generating an inhalable aerosol upon heating.
  • the aerosol-generating article comprises a capsule.
  • the capsule comprises a capsule outer wall defining an internal cavity.
  • the capsule comprises a first aerosol-generating substrate within the internal cavity of the capsule.
  • the capsule comprises at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall.
  • aerosol-generating article is used herein to denote an article comprising an aerosol-generating substrate which is heated to produce and deliver an inhalable aerosol to a consumer.
  • aerosol-generating substrate denotes a substrate capable of releasing volatile compounds upon heating to generate an aerosol.
  • aerosol-generating device refers to a device comprising a heater element that interacts with the aerosol-generating substrate of the aerosol-generating article to generate an aerosol.
  • the term “longitudinal” refers to the direction corresponding to the main longitudinal axis of the aerosol-generating article, which extends between the upstream and downstream ends of the aerosol-generating article.
  • the terms “upstream” and “downstream” describe the relative positions of elements, or portions of elements, of the aerosolgenerating article in relation to the direction in which the aerosol is transported through the aerosol-generating article during use. During use, air is drawn through the aerosol-generating article in the longitudinal direction.
  • the term “transverse” refers to the direction that is perpendicular to the longitudinal axis. Any reference to the “cross-section” of the aerosolgenerating article or a component of the aerosol-generating article refers to the transverse crosssection unless stated otherwise.
  • the term “length” denotes the dimension of a component of the aerosol-generating article in the longitudinal direction. For example, it may be used to denote the dimension of the capsule in the longitudinal direction.
  • solid refers to an aerosol-generating substrate that is not a liquid or a gas and which does not low such that it retains its shape and form at room temperature.
  • solid encompasses gel materials and compositions.
  • an aerosol-generating article having a capsule that contains a first aerosol-generating substrate within an internal cavity defined by the outer walls of the cavity provides a highly effective way to retain the first aerosol-generating substrate in place within the aerosol-generating article during storage and use.
  • This configuration is particularly beneficial for aerosol-generating substrates having a relatively high aerosol former content, such as aerosolgenerating films and gel compositions of the type described below.
  • the containment of the first aerosol-generating substrate within the capsule prevents leakage of aerosol former from the first aerosol-generating substrate during storage or use.
  • the first aerosolgenerating substrate melts upon heating, as would be the case for many gel compositions, the melted substrate can be effectively retained within the capsule. Leakage of the aerosol former or first aerosol-generating substrate from the aerosol-generating article during use can therefore be substantially prevented, so that the risk of contamination of the aerosol-generating device is advantageously minimised.
  • providing a capsule comprising at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall, may provide an enhanced effect in addition to the aerosol generated from heating the first aerosol-generating substrate within the internal cavity of the capsule.
  • the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate may result in at least one of an increase in the overall amount of generated aerosol, an increase in the density of the aerosol and an increase in the amount of active agent in the aerosol such as, for example, nicotine, aerosol former or flavor.
  • the aerosol generated by the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate may have complimentary tastes or properties to the aerosol generated by the first aerosol-generating substrate within the internal cavity of the capsule.
  • the resultant improved aerosol can then be delivered to the consumer.
  • the aerosol generated by at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall, may result in a faster generation of aerosol.
  • the at least one of an aerosol former, a flavorant and a second aerosol-generating substrate may result in a generation of aerosol at the very start of the experience even if the first aerosol-generating substrate within the internal cavity of the capsule is not yet sufficiently heated in order to generate an aerosol itself.
  • the aerosol generated by the first aerosol-generating substrate within the internal cavity may replace the aerosol generated by the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate. Therefore, advantageously, the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate may reduce or eliminate a delay between actuation of the external heating element and the generation of aerosol, and may result in an increased total amount and quality of aerosol generated by the aerosolgenerating article while also improving the consistency and duration of aerosol generation. This results in an improved experience for the user.
  • the aerosol generated by the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall may improve the duration of aerosol generation.
  • the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate may be heated after the first aerosol-generating substrate within the internal cavity of the capsule.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may continue to generate an aerosol beyond the depletion of the first aerosol-generating substrate within the internal cavity. Therefore, advantageously, providing the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall, may increase the duration and consistency of aerosol generation as well as increase the total amount of aerosol generated. This results in an improved experience for the user.
  • the second aerosol-generating substrate may be the same as the first aerosol-generating substrate.
  • the second aerosol-generating substrate may be different to the first aerosolgenerating substrate.
  • the capsule comprises both the first and second aerosol-generating substrates, wherein each of the first and second aerosolgenerating substrates comprises nicotine.
  • the second aerosol-generating substrate may comprise tobacco powder.
  • the capsule may be free of flavorants. In other words, the capsule may contain no flavorants.
  • the capsule may comprise an inner coating on at least a part of an inner surface of the capsule outer wall.
  • the inner coating of the capsule may comprise the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate.
  • providing an inner coating on at least a part of an inner surface of the capsule outer wall may prevent contamination of the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate of the inner coating during handling of the capsule.
  • the inner coating of the capsule may be provided on substantially the entire inner surface of the capsule outer wall.
  • the inner coating of the capsule may be provided only on a part of the inner surface of the capsule outer wall.
  • the inner coating of the capsule may be provided only on a part of the inner surface of the capsule outer wall extending parallel to a longitudinal axis of the aerosol-generating article.
  • the inner coating of the capsule may have a thickness of greater than or equal to 0.1 micrometres, greater than or equal to 0.2 micrometres, greater than or equal to 0.5 micrometres, greater than or equal to 1 micrometre, greater than or equal to 5 micrometres, greater than or equal to 10 micrometres, greater than or equal to 50 micrometres, greater than or equal to 0.1 millimetres, greater than or equal to 0.15 millimetres or greater than or equal to 0.2 millimetres.
  • the inner coating of the capsule may have a thickness of less than or equal to 1 millimetre, less than or equal to 0.75 millimetres, less than or equal to 0.5 millimetres, less than or equal to 0.4 millimetres, or less than or equal to 0.2 millimetres.
  • the inner coating of the capsule may have a thickness of between 50 micrometres and 1 millimetre, between 0.1 millimetres and 0.75 millimetres, between 0.1 millimetres and 0.5 millimetres, between 0.1 millimetres and 0.4 millimetres, between 0.1 millimetres and 0.2 millimetres, between 0.15 millimetres and 0.5 millimetres, between 0.2 millimetres and 0.4 millimetres, or between 0.1 millimetres and 0.2 millimetres.
  • the inner coating of the capsule may have a mass of greater than or equal to 0.05 micrograms, greater than or equal to 0.1 micrograms, greater than or equal to 0.2 micrograms, greater than or equal to 0.3 micrograms, greater than or equal to 0.4 micrograms, greater than or equal to 0.5 micrograms, greater than or equal to 0.6 micrograms, greater than or equal to 0.7 micrograms, greater than or equal to 0.8 micrograms, greater than or equal to 0.9 micrograms, greater than or equal to 1 microgram, greater than or equal to 10 micrograms, greater than or equal to 50 micrograms, greater than or equal to 100 micrograms, greater than or equal to 0.15 milligrams, greater than or equal to 0.2 milligrams, greater than or equal to 0.25 milligrams, greater than or equal to 0.5 milligrams, greater than or equal to 1 milligram, or greater than or equal to 1.5 milligrams.
  • the inner coating of the capsule may have a mass of less than or equal to 2 milligrams, less than or equal to 1.5 milligrams, less than or equal to 1 milligram, less than or equal to 0.5 milligrams, less than or equal to 0.25 milligrams, or less than or equal to 0.2 milligrams.
  • the inner coating of the capsule may have a mass of between 0.1 milligrams and 2 milligrams, between 0.15 milligrams and 1.5 milligrams, between 0.2 milligrams and 1 milligram, or between 0.25 milligrams and 0.5 milligrams.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may be dispersed within the capsule outer wall.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may be uniformly dispersed within substantially all of the capsule outer wall.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may only be dispersed in a part of the capsule outer wall.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may only be dispersed in the parts of the capsule outer wall which are parallel to a longitudinal axis of the capsule.
  • the capsule may comprise the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate both in an inner coating on at least a part of an inner surface of the capsule outer wall and dispersed within the capsule outer wall.
  • the capsule may comprise the second aerosol-generating substrate both in the inner coating on at least a part of an inner surface of the capsule outer wall and dispersed within the capsule outer wall.
  • the second aerosol-generating substrate which may be provided both in the inner coating on at least a part of an inner surface of the capsule outer wall and dispersed within the capsule outer wall, may comprise nicotine.
  • the capsule may comprise an inner coating on at least a part of an inner surface of the capsule outer wall, and the inner coating may comprise at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate.
  • the inner coating may comprise greater than or equal to 5 percent by weight of aerosol former on a dry weight basis, greater than or equal to 10 percent by weight of aerosol former on a dry weight basis, greater than or equal to 15 percent by weight of aerosol former on a dry weight basis, greater than or equal to 20 percent by weight of aerosol former on a dry weight basis, greater than or equal to 25 percent by weight of aerosol former on a dry weight basis, greater than or equal to 30 percent by weight of aerosol former on a dry weight basis, greater than or equal to 35 percent by weight of aerosol former on a dry weight basis, greater than or equal to 40 percent by weight of aerosol former on a dry weight basis, greater than or equal to 45 percent by weight of aerosol former on a dry weight basis, greater than or equal to 50 percent by weight of aerosol former
  • the inner coating may comprise less than or equal to 80 percent by weight of aerosol former on a dry weight basis, less than or equal to 75 percent of aerosol former by weight on a dry weight basis, less than or equal to 70 percent of aerosol former by weight on a dry weight basis, less than or equal to 60 percent of aerosol former by weight on a dry weight basis, less than or equal to 50 percent of aerosol former by weight on a dry weight basis, less than or equal to 40 percent of aerosol former by weight on a dry weight basis, less than or equal to 30 percent of aerosol former by weight on a dry weight basis, less than or equal to 25 percent of aerosol former by weight on a dry weight basis, less than or equal to 20 percent of aerosol former by weight on a dry weight basis, less than or equal to 15 percent of aerosol former by weight on a dry weight basis, or less than or equal to 10 percent of aerosol former by weight on a dry weight basis.
  • the inner coating may comprise between 5 percent by weight and 80 percent by weight of aerosol former on a dry weight basis, between 10 percent by weight and 80 percent by weight of aerosol former on a dry weight basis, between 15 percent by weight and 80 percent by weight of aerosol former on a dry weight basis, between 20 percent by weight and 80 percent by weight of aerosol former on a dry weight basis, between 25 percent by weight and 80 percent by weight of aerosol former on a dry weight basis, between 30 percent and 80 percent by weight of aerosol former on a dry weight basis, between 35 percent and 80 percent by weight of aerosol former on a dry weight basis, between 40 percent and 80 percent by weight of aerosol former on a dry weight basis, between 5 percent by weight and 60 percent by weight of aerosol former on a dry weight basis, between 10 percent by weight and 60 percent by weight of aerosol former on a dry weight basis, between 15 percent by weight and 60 percent by weight of aerosol former on a dry weight basis, between 20 percent by weight and 60 percent by weight of aerosol former on a dry weight basis, between 25 percent
  • Suitable aerosol formers for inclusion in the inner coating include, but are not limited to: polyhydric alcohols, such as triethylene glycol, propylene glycol, 1 ,3- butanediol and glycerol; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • polyhydric alcohols such as triethylene glycol, propylene glycol, 1 ,3- butanediol and glycerol
  • esters of polyhydric alcohols such as glycerol mono-, di- or triacetate
  • aliphatic esters of mono-, di- or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • the inner coating comprises glycerol as an aerosol former.
  • the inner coating may comprise between 5 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 10 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 15 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 20 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 25 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 30 percent and 80 percent by weight of glycerol on a dry weight basis, between 35 percent and 80 percent by weight of glycerol on a dry weight basis, between 40 percent and 80 percent by weight of glycerol on a dry weight basis, between 5 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between 10 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between 15 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between 20
  • the inner coating of the capsule may be substantially tobacco free.
  • the inner coating of the capsule may comprise one or more flavorants selected from menthol, mint such as peppermint and spearmint, chocolate, licorice, citrus and other fruit flavors, gamma octalactone, vanillin, ethyl vanillin, breath freshener flavors, spice flavors such as cinnamon, methyl salicylate, linalool, bergamot oil, geranium oil, lemon oil, ginger oil, and tobacco flavor, tea flavor, wine flavor, berry flavor, coffee flavor, flavor compounds selected from the group consisting of an acid, an alcohol, an ester, an aldehyde, a ketone, a pyrazine, lactic acid, sucrose and other sweeteners, quinine, other bitter compounds and combinations or blends thereof and the like.
  • flavorants selected from menthol, mint such as peppermint and spearmint, chocolate, licorice, citrus and other fruit flavors, gamma octalactone, vanillin, ethyl vanillin, breath
  • the inner coating may comprise greater than or equal to 0.1 percent by weight of flavorant on a dry weight basis, greater than or equal to 1 percent by weight of flavorant on a dry weight basis, greater than or equal to 2 percent by weight of flavorant on a dry weight basis, or greater than or equal to 5 percent by weight of flavorant on a dry weight basis.
  • the inner coating may comprise less than or equal to 10 percent by weight of flavorant on a dry weight basis, less than or equal to 5 percent by weight of flavorant on a dry weight basis, less than or equal to 2 percent by weight of flavorant on a dry weight basis, or less than or equal to 1 percent by weight of flavorant on a dry weight basis.
  • the inner coating may comprise between 0.1 percent and 10 percent by weight of flavorant on a dry weight basis, between 1 percent and 10 percent by weight of flavorant on a dry weight basis, between 2 percent and 10 percent by weight of flavorant on a dry weight basis, between 5 percent and 10 percent by weight of flavorant on a dry weight basis, between 0.1 percent and 5 percent by weight of flavorant on a dry weight basis, between 1 percent and 5 percent by weight of flavorant on a dry weight basis, between 2 percent and 5 percent by weight of flavorant on a dry weight basis, between 0.1 percent and 2 percent by weight of flavorant on a dry weight basis, or between 0.1 percent and 1 percent by weight of flavorant on a dry weight basis.
  • the inner coating of the capsule may comprise the second aerosol-generating substrate.
  • the second aerosol-generating substrate of the inner coating may comprise nicotine.
  • the term “nicotine” is used to describe nicotine, a nicotine base or a nicotine salt.
  • the amounts of nicotine recited herein are the amount of free base nicotine or amount of protonated nicotine, respectively.
  • the second aerosol-generating substrate of the inner coating may comprise natural nicotine or synthetic nicotine.
  • the nicotine may comprise one or more nicotine salts.
  • the one or more nicotine salts may be selected from the list consisting of nicotine lactate, nicotine citrate, nicotine pyruvate, nicotine bitartrate, nicotine benzoate, nicotine pectate, nicotine alginate, and nicotine salicylate.
  • the nicotine may comprise an extract of tobacco.
  • the inner coating may comprise at least 0.5 percent by weight of nicotine on a dry weight basis, at least 1 percent by weight of nicotine on a dry weight basis, or at least 2 percent by weight of nicotine on a dry weight basis.
  • the inner coating may comprise less than or equal to 10 percent by weight of nicotine on a dry weight basis, less than or equal to 8 percent by weight of nicotine on a dry weight basis, or less than or equal to 6 percent by weight of nicotine on a dry weight basis.
  • the inner coating may comprise between 0.5 percent and 10 percent by weight of nicotine on a dry weight basis, between 1 percent and 8 percent by weight of nicotine on a dry weight basis, or between 2 percent and 6 percent by weight of nicotine on a dry weight basis.
  • the second aerosol-generating substrate of the inner coating may comprise one or more carboxylic acids.
  • including one or more carboxylic acids in the second aerosol-generating substrate may create a nicotine salt.
  • the one or more carboxylic acids of the second aerosol-generating substrate of the inner coating may be selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids is selected from the group consisting of lactic acid and levulinic acid.
  • lactic acid and levulinic acid are particularly good carboxylic acids for creating nicotine salts.
  • the inner coating may comprise greater than or equal to 0.5 percent by weight of carboxylic acid on a dry weight basis, greater than or equal to 1 percent by weight of carboxylic acid on a dry weight basis, or greater than or equal to 2 percent by weight of carboxylic acid on a dry weight basis.
  • the inner coating may comprise less than or equal to 15 percent by weight of carboxylic acid on a dry weight basis, less than or equal to 10 percent by weight of carboxylic acid on a dry weight basis, or less than or equal to 5 percent by weight of carboxylic acid on a dry weight basis.
  • the inner coating may comprise between 0.5 percent and 15 percent by weight of carboxylic acid on a dry weight basis, between 1 percent and 10 percent by weight of carboxylic acid on a dry weight basis, between 2 percent and 5 percent by weight of carboxylic acid on a dry weight basis, between 0.25 percent and 3.5 percent by weight of carboxylic acid on a dry weight basis, between 0.5 percent and 3 percent by weight of carboxylic acid on a dry weight basis, or between 1 percent and 2.5 percent by weight of carboxylic acid on a dry weight basis.
  • the inner coating may comprise the second aerosol-generating substrate in the form of an aerosol-generating film comprising a cellulosic based film forming agent, nicotine and an aerosol former.
  • the aerosol-generating film of the inner coating may further comprise a cellulose based strengthening agent.
  • the aerosol-generating film of the inner coating may further comprise water, preferably less than or equal to 30 percent by weight of water.
  • the term “film” is used to describe a solid laminar element having a thickness that is less than the width or length thereof.
  • the film may be self-supporting.
  • a film may have cohesion and mechanical properties such that the film, even if obtained by casting a film-forming formulation on a support surface, can be separated from the support surface.
  • the film may be disposed on a support or sandwiched between other materials. This may enhance the mechanical stability of the film.
  • the aerosol former content of the aerosol-generating film of the inner coating may be within the ranges defined above for the second aerosol-generating substrate.
  • the aerosol-generating film of the inner coating preferably comprises at least 40 percent by weight of aerosol former, more preferably at least 50 percent by weight of aerosol former, more preferably at least 60 percent by weight, more preferably at least 70 percent by weight of aerosol former, on a dry weight basis.
  • the aerosol-generating film of the inner coating may comprise up to 80 percent by weight of aerosol former on a dry weight basis.
  • the aerosol former in the aerosolgenerating film of the inner coating is preferably glycerol.
  • cellulose based film-forming agent is used to describe a cellulosic polymer capable, by itself or in the presence of an auxiliary thickening agent, of forming a continuous film.
  • the cellulose-based film-forming agent of the inner coating is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methyl cellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), and combinations thereof.
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC ethylcellulose
  • HEMC hydroxyethyl methyl cellulose
  • HEC hydroxyethyl cellulose
  • HPC hydroxypropyl cellulose
  • the cellulose-based film-forming agent of the inner coating is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), and combinations thereof.
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC ethylcellulose
  • the cellulose-based film-forming agent of the inner coating is HPMC.
  • the aerosol-generating film of the inner coating may have a cellulose-based film-forming agent content of between 10 percent and 40 percent by weight, between 15 percent and 35 percent by weight, or between 20 percent and 30 percent by weight, on a dry weight basis.
  • the aerosol-generating film of the inner coating further comprises a cellulose based strengthening agent.
  • the cellulose based strengthening agent of the inner coating is selected from the group consisting of cellulose fibres, microcrystalline cellulose (MCC), cellulose powder, and combinations thereof.
  • the aerosol-generating film of the inner coating may have a cellulose based strengthening agent content of between 0.5 percent and 40 percent by weight on a dry weight basis, between 5 percent and 30 percent by weight on a dry weight basis, or between 10 percent and 25 percent by weight on a dry weight basis.
  • the aerosol-generating film of the inner coating may further comprise a carboxymethyl cellulose, preferably sodium carboxymethyl cellulose.
  • the aerosol-generating film of the inner coating may have a carboxymethyl cellulose content of between 1 percent and 15 percent by weight, between 2 percent and 12 percent by weight, or between 4 percent and 10 percent by weight, on a dry weight basis.
  • the nicotine content of the aerosol-generating film of the inner coating may be within the ranges defined above for the inner coating itself.
  • the aerosol-generating film of the inner coating may be a substantially tobacco-free aerosol-generating film.
  • the aerosol-generating film of the inner coating comprises an acid. More preferably, the aerosol-generating film of the inner coating comprises one or more organic acids. Even more preferably, the aerosol-generating film of the inner coating comprises one or more carboxylic acids. In particularly preferred embodiments, the acid is lactic acid, benzoic acid, fumaric acid or levulinic acid.
  • the aerosol-generating film of the inner coating comprises between 0.25 percent and 3.5 percent by weight of an acid, between 0.5 percent and 3 percent by weight of an acid, or between 1 percent and 2.5 percent by weight of an acid, on a dry weight basis.
  • the aerosol-generating film of the inner coating may have a thickness of between 50 micrometres and 1 millimetre, between 0.1 millimetres and 0.75 millimetres, between 0.1 millimetres and 0.5 millimetres, between 0.1 millimetres and 0.4 millimetres, between 0.1 millimetres and 0.2 millimetres, between 0.15 millimetres and 0.5 millimetres, between 0.2 millimetres and 0.4 millimetres, or between 0.1 millimetres and 0.2 millimetres.
  • the aerosol-generating film of the inner coating may optionally be provided on a suitable carrier element.
  • the inner coating may comprise the second aerosol-generating substrate in the form of a gel composition that comprises nicotine, at least one gelling agent and aerosol former.
  • the gel composition of the inner coating is preferably substantially tobacco free.
  • the preferred weight ranges for nicotine in the gel composition of the inner coating are the same as those defined above in relation to aerosol-generating films.
  • the gel composition of the inner coating preferably comprises at least 40 percent by weight of aerosol former, at least 50 percent by weight of aerosol former, more preferably at least 60 percent by weight, more preferably at least 70 percent by weight of aerosol former, on a dry weight basis.
  • the gel composition of the inner coating may comprise up to 80 percent by weight of aerosol former, on a dry weight basis.
  • the aerosol former in the gel composition of the inner coating is preferably glycerol.
  • the gel composition of the inner coating preferably includes at least one gelling agent.
  • the gel composition of the inner coating includes a total amount of gelling agents in a range from about 0.4 percent by weight to about 10 percent by weight, or from about 0.5 percent by weight to about 8 percent by weight, or from about 1 percent by weight to about 6 percent by weight, or from about 2 percent by weight to about 4 percent by weight, or from about 2 percent by weight to about 3 percent by weight, on a dry weight basis.
  • gelling agent refers to a compound that homogeneously, when added to a 50 percent by weight water/50 percent by weight glycerol mixture, in an amount of about 0.3 percent by weight, forms a solid medium or support matrix leading to a gel.
  • Gelling agents of the inner coating include, but are not limited to, hydrogen-bond crosslinking gelling agents, and ionic crosslinking gelling agents.
  • hydrophilicity crosslinking gelling agent refers to a gelling agent that forms non-covalent crosslinking bonds or physical crosslinking bonds via hydrogen bonding.
  • the gel composition of the inner coating may comprise a hydrogen-bond crosslinking gelling agent which may include one or more of a galactomannan, gelatin, agarose, or konjac gum, or agar.
  • the hydrogen-bond crosslinking gelling agent may preferably include agar.
  • ionic crosslinking gelling agent refers to a gelling agent that forms non-covalent crosslinking bonds or physical crosslinking bonds via ionic bonding.
  • the gel composition of the inner coating may comprise an ionic crosslinking gelling agent which may include low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate.
  • the ionic crosslinking gelling agent may preferably include low acyl gellan.
  • the gelling agent of the inner coating may include one or more biopolymers.
  • the biopolymers may be formed of polysaccharides.
  • Biopolymers include, for example, gellan gums (native, low acyl gellan gum, high acyl gellan gums with low acyl gellan gum being preferred), xanthan gum, alginates (alginic acid), agar, guar gum, and the like.
  • the gel composition of the inner coating may preferably include xanthan gum.
  • the gel composition of the inner coating may include two biopolymers.
  • the gel composition of the inner coating may include three biopolymers.
  • the gel composition of the inner coating may include the two biopolymers in substantially equal weights.
  • the gel composition of the inner coating may include the three biopolymers in substantially equal weights.
  • the gel composition of the inner coating may further include a viscosifying agent. The viscosifying agent combined with the hydrogen-bond crosslinking gelling agent and the ionic crosslinking gelling agent appears to surprisingly support the solid medium and maintain the gel composition even when the gel composition comprises a high level of glycerol.
  • viscosifying agent refers to a compound that, when added homogeneously into a 25°C, 50 percent by weight water/50 percent by weight glycerol mixture, in an amount of 0.3 percent by weight, increases the viscosity without leading to the formation of a gel, the mixture staying or remaining fluid.
  • the gel composition of the inner coating preferably includes the viscosifying agent in a range from about 0.2 percent by weight to about 5 percent by weight, or from about 0.5 percent by weight to about 3 percent by weight, or from about 0.5 percent by weight to about 2 percent by weight, or from about 1 percent by weight to about 2 percent by weight, on a dry weight basis.
  • the viscosifying agent of the gel composition of the inner coating may include one or more of xanthan gum, carboxymethyl-cellulose, microcrystalline cellulose, methyl cellulose, gum Arabic, guar gum, lambda carrageenan, or starch.
  • the viscosifying agent of the gel composition of the inner coating may preferably include xanthan gum.
  • the gel composition of the inner coating may further include a divalent cation.
  • the divalent cation includes calcium ions, such as calcium lactate in solution.
  • Divalent cations (such as calcium ions) may assist in the gel formation of compositions that include gelling agents such as the ionic crosslinking gelling agent, for example. The ion effect may assist in the gel formation.
  • the divalent cation may be present in the gel composition of the inner coating in a range from about 0.1 to about 1 percent by weight, or about 0.5 percent by weight, on a dry weight basis.
  • the gel composition of the inner coating may further include an acid.
  • the acid may comprise a carboxylic acid.
  • the carboxylic acid may include a ketone group.
  • the carboxylic acid may include a ketone group having less than about 10 carbon atoms, or less than about 6 carbon atoms or less than about 4 carbon atoms, such as levulinic acid or lactic acid.
  • this carboxylic acid has three carbon atoms (such as lactic acid).
  • the gel composition of the inner coating preferably comprises water.
  • the gel composition of the inner coating is more stable when the composition comprises water.
  • the gel composition of the inner coating comprises between about 8 percent by weight to about 32 percent by weight water, or from about 15 percent by weight to about 25 percent by weight water, or from about 18 percent by weight to about 22 percent by weight water, or about 20 percent by weight water.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate may be dispersed within the capsule outer wall. It will be appreciated that at least one of the aerosol former, flavorant and second aerosolgenerating substrate which may be dispersed within the capsule outer wall may be the same or different to the at least one of the aerosol former, flavorant and second aerosol-generating substrate of the inner coating of the capsule discussed above.
  • the capsule may comprise the aerosol former dispersed within the capsule outer wall.
  • the aerosol former within the capsule outer wall may comprise an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • the polyhydric alcohol which may be dispersed within the capsule outer wall may be selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former within the capsule outer wall comprises glycerol.
  • the aerosol former within the capsule outer wall may comprise an ester of polyhydric alcohol selected from at least one of glycerol monoacetate, glycerol diacetate and glycerol triacetate.
  • the aerosol former within the capsule outer wall may comprise an aliphatic ester of mono-, di- or polycarboxylic acids selected from at least one of dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • the capsule outer wall may comprise greater than or equal to 5 percent by weight of aerosol former on a dry weight basis, greater than or equal to 10 percent by weight of aerosol former on a dry weight basis, greater than or equal to 15 percent by weight of aerosol former on a dry weight basis, greater than or equal to 20 percent by weight of aerosol former on a dry weight basis, greater than or equal to 25 percent by weight of aerosol former on a dry weight basis, greater than or equal to 30 percent by weight of aerosol former on a dry weight basis, greater than or equal to 35 percent by weight of aerosol former on a dry weight basis, greater than or equal to 40 percent by weight of aerosol former on a dry weight basis.
  • the capsule outer wall may comprise less than or equal to 50 percent of aerosol former by weight on a dry weight basis, less than or equal to 40 percent of aerosol former by weight on a dry weight basis, less than or equal to 30 percent of aerosol former by weight on a dry weight basis, less than or equal to 25 percent of aerosol former by weight on a dry weight basis, less than or equal to 20 percent of aerosol former by weight on a dry weight basis, less than or equal to 15 percent of aerosol former by weight on a dry weight basis, or less than or equal to 10 percent of aerosol former by weight on a dry weight basis.
  • the capsule outer wall may comprise between 5 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 10 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 15 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 20 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 25 percent by weight and 80 percent by weight of glycerol on a dry weight basis, between 30 percent and 80 percent by weight of glycerol on a dry weight basis, between 35 percent and 80 percent by weight of glycerol on a dry weight basis, between 40 percent and 80 percent by weight of glycerol on a dry weight basis, between 5 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between 10 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between 15 percent by weight and 60 percent by weight of glycerol on a dry weight basis, between
  • One or more flavorants may be dispersed within the capsule outer wall.
  • the one or more flavorants within the capsule outer wall may be selected from menthol, mint such as peppermint and spearmint, chocolate, licorice, citrus and other fruit flavors, gamma octalactone, vanillin, ethyl vanillin, breath freshener flavors, spice flavors such as cinnamon, methyl salicylate, linalool, bergamot oil, geranium oil, lemon oil, ginger oil, and tobacco flavor, tea flavor, wine flavor, berry flavor, coffee flavor, flavor compounds selected from the group consisting of an acid, an alcohol, an ester, an aldehyde, a ketone, a pyrazine, lactic acid, sucrose and other sweeteners, quinine, other bitter compounds and combinations or blends thereof and the like.
  • the capsule outer wall may be substantially tobacco free. That is, tobacco may not be dispersed within the capsule outer wall.
  • the capsule may comprise the second aerosol-generating substrate dispersed within the capsule outer wall.
  • the second aerosol-generating substrate may comprise nicotine.
  • the second aerosol-generating substrate within the capsule outer wall may comprise natural nicotine or synthetic nicotine.
  • the second aerosol-generating substrate within the capsule outer wall may comprise one or more nicotine salts.
  • the one or more nicotine salts of the second aerosol-generating substrate within the capsule outer wall may be selected from the list consisting of nicotine lactate, nicotine citrate, nicotine pyruvate, nicotine bitartrate, nicotine benzoate, nicotine pectate, nicotine alginate, and nicotine salicylate.
  • the nicotine of the second aerosol-generating substrate within the capsule outer wall may comprise an extract of tobacco.
  • the capsule outer wall may comprise at least 0.5 percent by weight of nicotine on a dry weight basis, at least 1 percent by weight of nicotine on a dry weight basis, or at least 2 percent by weight of nicotine on a dry weight basis.
  • the capsule outer wall may comprise less than or equal to 10 percent by weight of nicotine on a dry weight basis, less than or equal to 8 percent by weight of nicotine on a dry weight basis, or less than or equal to 6 percent by weight of nicotine on a dry weight basis.
  • the capsule outer wall may comprise between 0.5 percent and 10 percent by weight of nicotine on a dry weight basis, between 1 percent and 8 percent by weight of nicotine on a dry weight basis, or between 2 percent and 6 percent by weight of nicotine on a dry weight basis.
  • the second aerosol-generating substrate within the capsule outer wall may comprise one or more carboxylic acids.
  • including one or more carboxylic acids in the second aerosol-generating substrate may create a nicotine salt.
  • the second aerosol-generating substrate within the capsule outer wall may comprise one or more carboxylic acids which may be selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids is selected from the group consisting of lactic acid and levulinic acid.
  • lactic acid and levulinic acid are particularly good carboxylic acids for creating nicotine salts.
  • the capsule outer wall may comprise greater than or equal to 0.5 percent by weight of carboxylic acid on a dry weight basis, greater than or equal to 1 percent by weight of carboxylic acid on a dry weight basis, or greater than or equal to 2 percent by weight of carboxylic acid on a dry weight basis.
  • the capsule outer wall may comprise less than or equal to 15 percent by weight of carboxylic acid on a dry weight basis, less than or equal to 10 percent by weight of carboxylic acid on a dry weight basis, or less than or equal to 5 percent by weight of carboxylic acid on a dry weight basis.
  • the capsule outer wall may comprise between 0.5 percent and 15 percent by weight of carboxylic acid on a dry weight basis, between 1 percent and 10 percent by weight of carboxylic acid on a dry weight basis, between 2 percent and 5 percent by weight of carboxylic acid on a dry weight basis, between 0.25 percent and 3.5 percent by weight of carboxylic acid on a dry weight basis, between 0.5 percent and 3 percent by weight of carboxylic acid on a dry weight basis, or between 1 percent and 2.5 percent by weight of carboxylic acid on a dry weight basis.
  • the capsule outer wall may be formed of any suitable material.
  • the capsule outer wall is formed of an air impermeable material, most preferably an air impermeable polymeric material. This ensures that air does not pass through the capsule outer wall, other than in the holes provided specifically for airflow during use. The airflow through the capsule during use can therefore be effectively controlled.
  • the capsule outer wall may be formed of a porous material.
  • the capsule outer wall may comprise a polymeric material or a cellulose-based material.
  • the capsule outer wall may be made of one or more polymers that are compatible with nicotine, including medical grade polymers such as ALTUGLAS® Medical Resins Polymethlymethacrylate (PMMA) , Chevron Phillips K- Resin® Styrene-butadiene copolymer (SBC) , Arkema special performance polymers Pebax®, Rilsan®, and Rilsan® Clear, DOW (Health+TM) Low-Density Polyethylene (LDPE) , DOWTM LDPE 91003, DOWTM LDPE 91020 (MFI 2.0; density 923), ExxonMobilTM Polypropylene (PP) PP1013H1 , PP1014H1 and PP9074MED, Trinseo CALIBRETM Polycarbonate (PC) 2060-SERIES.
  • medical grade polymers such as ALTUGLAS® Medical Resins Polymethlymethacryl
  • the capsule outer wall may alternatively be formed from one or more materials selected from: polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), gelatin and hydroxypropyl methyl cellulose (HPMC).
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinylchloride
  • PET polyethylene terephthalate
  • PDA polylactic acid
  • CA cellulose acetate
  • HPMC hydroxypropyl methyl cellulose
  • the capsule outer wall should be formed of a pierceable or frangible material.
  • the upstream end wall of the capsule may optionally comprise one or more lines or areas of weakness, which are positioned in order to facilitate the insertion of a heating element through the capsule outer wall during use.
  • the capsule outer wall may further comprise an external coating on at least a part of an outer surface of the capsule outer wall. It will be appreciated that the external coating may comprise the same or different properties to the inner coating.
  • providing an external coating on at least a part of an outer surface of the capsule outer wall may prevent contamination of or damage to the capsule during handling.
  • the capsule comprises a first aerosol-generating substrate within the internal cavity of the capsule.
  • the first aerosol-generating substrate within the internal cavity of the capsule may be provided in any suitable form.
  • the first aerosol-generating substrate within the internal cavity of the capsule may be a solid first aerosol-generating substrate.
  • the capsule contains a plurality of particles of solid first aerosol-generating substrate.
  • the capsule may comprise a plurality of beads, pellets, granules, strips, shreds or flakes of the first aerosol-generating substrate.
  • the maximum dimension of each of the particles is preferably at least 0.05 millimetres, more preferably at least 0.1 millimetres, more preferably at least 0.15 millimetres, more preferably at least 0.2 millimetres, more preferably at least 0.25 millimetres, more preferably at least 0.5 millimetres, more preferably at least 0.75 millimetres, more preferably at least 1 millimetre.
  • the maximum dimension of each of the particles is no more than 10 millimetres, more preferably no more than 9 millimetres, more preferably no more than 8 millimetres, more preferably no more than 6 millimetres, more preferably no more than 5 millimetres. Providing relatively large particles within these ranges may be preferable when the capsule wall is provided with holes to form air inlets and outlets, as described below. The relatively large maximum dimension of the particles will then ensure that the particles are not lost through the holes in the capsule wall.
  • the maximum dimension of a particle corresponds to the largest external diameter of that particles. Where the particles are substantially spherical, the maximum dimension of a particle will correspond to the diameter of that particle.
  • the capsule preferably comprises at least 2 particles of the first aerosol-generating substrate, more preferably at least 5 particles of the first aerosol-generating substrate, more preferably at least 10 particles of the first aerosol-generating substrate, more preferably at least 20 particles of the first aerosol-generating substrate, more preferably at least 30 particles of the first aerosol-generating substrate.
  • the capsule may contain up to 200 particles.
  • the solid first aerosol-generating substrate may be in the form of a powder having a larger number of much smaller particles.
  • the powder may be formed of particles having a D50 size of between 50 micrometres and 80 micrometres, between 50 micrometres and 75 micrometres, between 55 micrometres and 75 micrometres, between 55 micrometres and 70 micrometres, or between 60 micrometres and 70 micrometres.
  • the term “D50 size” refers to the median particle size of the particulate material or powder.
  • the D50 size is the particle size which splits the distribution in half, where half of the particles are larger than the D50 size and half of the particles are smaller than the D50 size.
  • the particle size distribution may be determined by laser diffraction.
  • the particle size distribution may be determined by laser diffraction using a Malvern Mastersizer 3000 laser diffraction particle size analyser in accordance with the manufacturer’s instructions.
  • the powder may be formed of particles having a D95 size of between 80 micrometres and 130 micrometres, between 90 micrometres and 125 micrometres, between 100 micrometres and 120 micrometres, or between 110 micrometres and 120 micrometres.
  • D95 size is the size at which the proportion by mass of particles with sizes below this value is 95 percent.
  • the powder may be formed of particles having a maximum diameter of between 50 micrometres and 250 micrometres, between 80 micrometres and 225 micrometres, or between 100 micrometres and 125 micrometres.
  • the mass of each particle is preferably at least 0.05 micrograms, more preferably at least 0.1 micrograms, more preferably at least 0.2 micrograms, more preferably at least 0.3 micrograms, more preferably at least 0.4 micrograms, more preferably at least 0.5 micrograms, more preferably at least 0.6 micrograms, more preferably at least 0.7 micrograms, more preferably at least 0.8 micrograms, more preferably at least 0.9 micrograms, more preferably at least 1 microgram, more preferably at least 10 micrograms, more preferably at least 100 micrograms, more preferably at least 200 micrograms, more preferably at least 500 micrograms, more preferably at least 1 milligram.
  • the mass of each particle is preferably no more than 600 milligrams, more preferably no more than 500 milligrams, more preferably no more than 400 milligrams, more preferably no more than 300 milligrams, more preferably no more than 200 milligrams, more preferably no more than 100 milligrams, more preferably no more than 50 milligrams, more preferably no more than 10 milligrams.
  • the solid first aerosol-generating substrate may be in the form of one or more sheets.
  • sheet describes a laminar element having a width and length substantially greater than the thickness thereof.
  • the one or more sheets as described herein may have been one or more of crimped, folded, gathered and pleated.
  • the one or more sheets may be cut into strands.
  • the first aerosol-generating substrate comprises nicotine. More preferably, the first aerosol-generating substrate comprises nicotine and an aerosol former but may take a variety of different forms.
  • the first aerosol-generating substrate may comprise at least 15 percent by weight of aerosol former on a dry weight basis.
  • the first aerosol-generating substrate comprises at least 20 percent by weight of aerosol former, more preferably at least 25 percent by weight of aerosol former, more preferably at least 30 percent by weight of aerosol former, more preferably at least 35 percent by weight of aerosol former, more preferably at least 40 percent by weight of aerosol former, more preferably at least 45 percent by weight of aerosol former, more preferably at least 50 percent by weight of aerosol former, on a dry weight basis.
  • the first aerosol-generating substrate comprises no more than 80 percent by weight of aerosol former, more preferably no more than 75 percent by weight of aerosol former, more preferably no more than 70 percent by weight of aerosol former, on a dry weight basis.
  • the first aerosol-generating substrate may have an aerosol former content of between 15 percent by weight and 80 percent by weight of aerosol former, between 20 percent by weight and 80 percent by weight of aerosol former, between 25 percent by weight and 80 percent by weight of aerosol former, between 30 percent and 80 percent by weight of aerosol former, between 35 percent and 80 percent by weight of aerosol former, between 40 percent and 80 percent by weight of aerosol former, between 30 percent by weight and 75 percent by weight of aerosol former, between 35 percent by weight and 75 percent by weight of aerosol former, between 40 percent and 75 percent by weight of aerosol former, between 45 percent and 75 percent by weight of aerosol former, between 40 and 70 percent by weight of aerosol former, between 45 percent and 70 percent by weight of aerosol former, or between 50 percent and 70 percent by weight of aerosol former, on a dry weight basis.
  • the aerosol former content of the first aerosolgenerating substrate may be between 40 percent and 80 percent by weight of aerosol former, or between 45 percent and 75 percent by weight of aerosol former, or between 50 percent and 70 percent by weight of aerosol former, on a dry weight basis. In such embodiments, the aerosol former content of the first aerosol-generating substrate is therefore relatively high.
  • Suitable aerosol formers for inclusion in the first aerosol-generating substrate include, but are not limited to: polyhydric alcohols, such as triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • polyhydric alcohols such as triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol
  • esters of polyhydric alcohols such as glycerol mono-, di- or triacetate
  • aliphatic esters of mono-, di- or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • the first aerosol-generating substrate comprises glycerol as an aerosol former.
  • the first aerosol-generating substrate may have a glycerol content of between 15 percent and 80 percent by weight, or between 20 percent by weight and 80 percent by weight, or between 25 percent by weight and 80 percent by weight, or between 30 percent by weight and 75 percent by weight, or between 35 percent by weight and 75 percent by weight, or between 40 percent by weight and 70 percent by weight, or between 45 percent by weight and 70 percent by weight, or between 50 percent by weight and 70 percent by weight, on a dry weight basis.
  • the first aerosol-generating substrate may comprise nicotine.
  • nicotine is used to describe nicotine, a nicotine base or a nicotine salt.
  • the amounts of nicotine recited herein are the amount of free base nicotine or amount of protonated nicotine, respectively.
  • the first aerosol-generating substrate within the internal cavity of the capsule may comprise natural nicotine or synthetic nicotine.
  • the nicotine may comprise one or more nicotine salts.
  • the one or more nicotine salts may be selected from the list consisting of nicotine lactate, nicotine citrate, nicotine pyruvate, nicotine bitartrate, nicotine benzoate, nicotine pectate, nicotine alginate, and nicotine salicylate.
  • the nicotine may comprise an extract of tobacco.
  • the first aerosol-generating substrate comprises at least 0.5 percent by weight of nicotine on a dry weight basis. More preferably, the first aerosol-generating substrate comprises at least 1 percent by weight of nicotine on a dry weight basis. Even more preferably, the first aerosol-generating substrate comprises at least 2 percent by weight of nicotine on a dry weight basis. In addition, or as an alternative, the first aerosol-generating substrate preferably comprises less than 10 percent by weight of nicotine on a dry weight basis. More preferably, the first aerosol-generating substrate comprises less than 8 percent by weight of nicotine on a dry weight basis. More preferably, the first aerosol-generating substrate comprises less than 6 percent by weight of nicotine on a dry weight basis.
  • the first aerosol-generating substrate may comprise between 0.5 percent and 10 percent by weight of nicotine, or between 1 percent and 8 percent by weight of nicotine, or between 2 percent and 6 percent by weight of nicotine, on a dry weight basis.
  • the first aerosol-generating substrate may comprise one or more carboxylic acids.
  • including one or more carboxylic acids in the first aerosol-generating substrate may create a nicotine salt.
  • the one or more carboxylic acids may comprise one or more of lactic acid and levulinic acid.
  • lactic acid and levulinic acid are particularly good carboxylic acids for creating nicotine salts.
  • the first aerosol-generating substrate comprises at least 0.5 percent by weight of carboxylic acid, on a dry weight basis. More preferably, the first aerosol-generating substrate comprises at least 1 percent by weight of carboxylic acid, on a dry weight basis. More preferably, the first aerosol-generating substrate comprises at least 2 percent by weight of carboxylic acid, on a dry weight basis.
  • the first aerosol-generating substrate may comprise less than 15 percent by weight of carboxylic acid, on a dry weight basis. More preferably, the first aerosol-generating substrate comprises less than 10 percent by weight of carboxylic acid, on a dry weight basis. More preferably, the first aerosol-generating substrate comprises less than 5 percent by weight of carboxylic acid, on a dry weight basis.
  • the first aerosolgenerating substrate may comprise between 0.5 percent and 15 percent by weight of carboxylic acid on a dry weight basis, between 1 percent and 10 percent by weight of carboxylic acid on a dry weight basis, between 2 percent and 5 percent by weight of carboxylic acid on a dry weight basis, between 0.25 percent and 3.5 percent by weight of carboxylic acid on a dry weight basis, between 0.5 percent and 3 percent by weight of carboxylic acid on a dry weight basis, or between 1 percent and 2.5 percent by weight of carboxylic acid on a dry weight basis.
  • the first aerosol-generating substrate may be substantially tobacco free.
  • the first aerosol-generating is in the form of an aerosolgenerating film comprising a cellulosic based film forming agent, nicotine and aerosol former.
  • the aerosol-generating film of the first aerosol-generating substrate may comprise glycerol.
  • the aerosol-generating film of the first aerosol-generating substrate may have a glycerol content of at least 40 percent by weight, on a dry weight basis.
  • the aerosol-generating film of the first aerosolgenerating substrate within the internal cavity of the capsule may further comprise a cellulose based strengthening agent.
  • the aerosol-generating film of the first aerosol-generating substrate within the internal cavity of the capsule may further comprise water, preferably less than or equal to 30 percent by weight of water.
  • the aerosol former content of the aerosol-generating film of the first aerosol-generating substrate may be within the ranges defined above for the first aerosol-generating substrate.
  • cellulose based film-forming agent is used to describe a cellulosic polymer capable, by itself or in the presence of an auxiliary thickening agent, of forming a continuous film.
  • the cellulose-based film-forming agent of the first aerosol-generating substrate is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methyl cellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), and combinations thereof.
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC ethylcellulose
  • HEMC hydroxyethyl methyl cellulose
  • HEC hydroxyethyl cellulose
  • HPC hydroxypropyl cellulose
  • the cellulose-based film-forming agent of the first aerosol-generating substrate is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), and combinations thereof.
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC ethylcellulose
  • the cellulose-based film-forming agent of the first aerosol-generating substrate is HPMC.
  • the aerosol-generating film of the first aerosol-generating substrate may have a cellulose- based film-forming agent content of between 10 percent and 40 percent by weight, or between 15 percent and 35 percent by weight, or between 20 percent and 30 percent by weight, on a dry weight basis.
  • the aerosol-generating film of the first aerosol-generating substrate further comprises a cellulose based strengthening agent.
  • the cellulose based strengthening agent is selected from the group consisting of cellulose fibres, microcrystalline cellulose (MCC), cellulose powder, and combinations thereof.
  • the aerosol-generating film of the first aerosol-generating substrate may have a cellulose based strengthening agent content of between 0.5 percent and 40 percent by weight on a dry weight basis, or between 5 percent and 30 percent by weight on a dry weight basis, or between 10 percent and 25 percent by weight on a dry weight basis.
  • the aerosol-generating film of the first aerosol-generating substrate may further comprise a carboxymethyl cellulose, preferably sodium carboxymethyl cellulose.
  • the aerosol-generating film of the first aerosol-generating substrate may have a carboxymethyl cellulose content of between 1 percent and 15 percent by weight, or between 2 percent and 12 percent by weight, or between 4 percent and 10 percent by weight on a dry weight basis.
  • the nicotine content of the aerosol-generating film of the first aerosol-generating substrate may be within the ranges defined above for the first aerosol-generating substrate within the internal cavity of the capsule.
  • the aerosol-generating film of the first aerosol-generating substrate may be a substantially tobacco-free aerosol-generating film.
  • the aerosol-generating film of the first aerosol-generating substrate comprises an acid. More preferably, the aerosol-generating film of the first aerosolgenerating substrate comprises one or more organic acids. Even more preferably, the aerosolgenerating film of the first aerosol-generating substrate comprises one or more carboxylic acids. In particularly preferred embodiments, the acid is lactic acid, benzoic acid, fumaric acid or levulinic acid.
  • the aerosol-generating film of the first aerosol-generating substrate comprises between 0.25 percent and 3.5 percent by weight of an acid, or between 0.5 percent and 3 percent by weight of an acid, or between 1 percent and 2.5 percent by weight of an acid, on a dry weight basis.
  • the aerosol-generating film of the first aerosol-generating substrate may have a thickness of between 50 micrometres and 1 millimetre, between 0.1 millimetres and 1 millimetre, between 0.1 millimetres and 0.75 millimetres, between 0.1 millimetres and 0.5 millimetres, between 0.1 millimetres and 0.4 millimetres, between 0.1 millimetres and 0.2 millimetres, between 0.15 millimetres and 0.5 millimetres, between 0.2 millimetres and 0.4 millimetres, or between 0.1 millimetres and 0.2 millimetres.
  • a layer of the film-forming composition of the first aerosol-generating substrate within the internal cavity of the capsule is formed that has a thickness from about 50 micrometres to 400 micrometres, more preferably from about 100 micrometres to 200 micrometres.
  • the aerosol-generating film of the first aerosol-generating substrate may be provided on a suitable carrier element.
  • the first aerosol-generating may comprise a gel composition that comprises nicotine, at least one gelling agent and aerosol former.
  • the gel composition of the first aerosol-generating substrate is preferably substantially tobacco free.
  • the preferred weight ranges for nicotine in the gel composition of the first aerosolgenerating substrate may be the same as those defined above in relation to aerosol-generating films of the first aerosol-generating substrate.
  • the gel composition of the first aerosol-generating substrate preferably comprises at least 50 percent by weight of aerosol former, more preferably at least 60 percent by weight, more preferably at least 70 percent by weight of aerosol former, on a dry weight basis.
  • the gel composition of the first aerosol-generating substrate may comprise up to 80 percent by weight of aerosol former, on a dry weight basis.
  • the aerosol former in the gel composition of the first aerosol-generating substrate is preferably glycerol.
  • the gel composition of the first aerosol-generating substrate preferably includes at least one gelling agent.
  • the gel composition of the first aerosol-generating substrate includes a total amount of gelling agents in a range from about 0.4 percent by weight to about 10 percent by weight, or from about 0.5 percent by weight to about 8 percent by weight, or from about 1 percent by weight to about 6 percent by weight, or from about 2 percent by weight to about 4 percent by weight, or from about 2 percent by weight to about 3 percent by weight, on a dry weight basis.
  • Gelling agents of the first aerosol-generating substrate may include, but are not limited to, hydrogen-bond crosslinking gelling agents, and ionic crosslinking gelling agents.
  • the hydrogen-bond crosslinking gelling agent of the first aerosol-generating substrate may include one or more of a galactomannan, gelatin, agarose, or konjac gum, or agar.
  • the hydrogen-bond crosslinking gelling agent may preferably include agar.
  • the ionic crosslinking gelling agent of the first aerosol-generating substrate may include low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate.
  • the ionic crosslinking gelling agent may preferably include low acyl gellan.
  • the gelling agent of the first aerosol-generating substrate may include one or more biopolymers.
  • the biopolymers may be formed of polysaccharides.
  • Biopolymers of the first aerosol-generating substrate may include, for example, gellan gums (native, low acyl gellan gum, high acyl gellan gums with low acyl gellan gum being preferred), xanthan gum, alginates (alginic acid), agar, guar gum, and the like.
  • the composition may preferably include xanthan gum.
  • the composition of the first aerosol-generating substrate may include two biopolymers.
  • the composition of the first aerosol-generating substrate may include three biopolymers.
  • the composition of the first aerosol-generating substrate may include the two biopolymers in substantially equal weights.
  • the composition of the first aerosolgenerating substrate may include the three biopolymers in substantially equal weights.
  • the gel composition of the first aerosol-generating substrate may further include a viscosifying agent.
  • the viscosifying agent combined with the hydrogen-bond crosslinking gelling agent and the ionic crosslinking gelling agent appears to surprisingly support the solid medium and maintain the gel composition of the first aerosol-generating substrate within the internal cavity of the capsule even when the gel composition comprises a high level of glycerol.
  • the gel composition of the first aerosol-generating substrate preferably includes the viscosifying agent in a range from about 0.2 percent by weight to about 5 percent by weight, or from about 0.5 percent by weight to about 3 percent by weight, or from about 0.5 percent by weight to about 2 percent by weight, or from about 1 percent by weight to about 2 percent by weight, on a dry weight basis.
  • the viscosifying agent of the first aerosol-generating substrate may include one or more of xanthan gum, carboxymethyl-cellulose, microcrystalline cellulose, methyl cellulose, gum Arabic, guar gum, lambda carrageenan, or starch.
  • the viscosifying agent may preferably include xanthan gum.
  • the gel composition of the first aerosol-generating substrate may further include a divalent cation.
  • the divalent cation of the first aerosol-generating substrate includes calcium ions, such as calcium lactate in solution.
  • Divalent cations (such as calcium ions) may assist in the gel formation of compositions that include gelling agents such as the ionic crosslinking gelling agent, for example. The ion effect may assist in the gel formation.
  • the divalent cation may be present in the gel composition of the first aerosol-generating substrate in a range from about 0.1 to about 1 percent by weight, or about 0.5 percent by weight, on a dry weight basis.
  • the gel composition of the first aerosol-generating substrate may further include an acid.
  • the acid may comprise a carboxylic acid.
  • the carboxylic acid may include a ketone group.
  • the carboxylic acid may include a ketone group having less than about 10 carbon atoms, or less than about 6 carbon atoms or less than about 4 carbon atoms, such as levulinic acid or lactic acid.
  • this carboxylic acid has three carbon atoms (such as lactic acid).
  • the gel composition of the first aerosol-generating substrate preferably comprises some water.
  • the gel composition of the first aerosol-generating substrate is more stable when the composition comprises some water.
  • the gel composition of the first aerosol-generating substrate comprises between about 8 percent by weight to about 32 percent by weight water, or from about 15 percent by weight to about 25 percent by weight water, or from about 18 percent by weight to about 22 percent by weight water, or about 20 percent by weight water.
  • the capsule is preferably capsule shaped, in the form of a sphero-cylinder, with a cylindrical portion defined by a cylindrical wall and rounded, hemispherical end walls at each end of the cylindrical portion.
  • This type of capsule is commonly used in the pharmaceutical industry.
  • the capsule may be spherical, or ovoid.
  • the capsule is a two-part capsule, with two separate parts that fit together to close the capsule and retain the contents.
  • the two separate parts may fit together by means of a friction fit, without adhesive.
  • an adhesive may be used to seal the two parts together.
  • the two separate parts may have one or more of a different size and shape to each other.
  • the capsule comprises a first part and a second part, wherein the second part has a smaller outer diameter than the first part such that an end of the second part can be inserted into an open end of the first part in order to close the capsule.
  • the second part of the capsule is provided downstream of the first part.
  • the outer diameters of the first part and the second part of the capsule may be adapted such that only the second part of the capsule can be received within the hollow tubular element.
  • the outer diameter of the first part of the capsule is adapted to be larger than the internal diameter of the hollow tubular element so that the first part of the capsule cannot be received within the hollow tubular element and remains outside of the hollow tubular element at the upstream end.
  • the second part of the capsule is retained within the hollow tubular element by means of a friction fit. The first part prevents the capsule from being pushed any further into the hollow tubular element.
  • the capsule may be fully inserted into the hollow tubular element and the outer diameters of the first part and the second part of the capsule may be adapted such that the outer diameter of the second part is smaller than the internal diameter of the hollow tubular element.
  • This provides a space between the second part of the capsule and the wall of the hollow tubular element to enable airflow around the second part of the capsule.
  • the outer diameter of the first part of the capsule is preferably adapted such that the first part of the capsule is retained within the hollow tubular article by means of a friction fit.
  • the first part of the capsule may be retained in place by means of a suitable adhesive. Either of these arrangements preferably substantially prevents airflow around the first part of the capsule, downstream from the second part of the capsule.
  • the internal cavity of the capsule has a volume of at least 250 cubic millimetres, corresponding to 0.25 millilitres. This corresponds to the internal volume of the capsule, or the capacity.
  • the internal cavity of the capsule has a volume of at least 400 cubic millimetres (0.4 millilitres), more preferably at least 500 cubic millimetres (0.5 millilitres), more preferably at least 600 cubic millimetres (0.6 millilitres).
  • the internal cavity of the capsule may be less than 2000 cubic millimetres (2 millilitres), or less than 1500 cubic millimetres (1 .5 millilitres) or less than 1000 cubic millimetres (1 millilitre).
  • standard capsule sizes 000, 00, 0, 0, 1 , 2 and 3 may be suitable.
  • the capsule preferably has a length of at least 10 millimetres, more preferably at least 12 millimetres, more preferably at least 15 millimetres, more preferably at least 18 millimetres.
  • the length of the capsule is preferably less than 30 millimetres, more preferably less than 28 millimetres, more preferably less than 25 millimetres.
  • the capsule length may be between 10 millimetres and 30 millimetres, or between 12 millimetres and 28 millimetres, or between 15 millimetres and 25 millimetres, or between 18 millimetres and 25 millimetres.
  • the capsule length may be around 20 millimetres.
  • the capsule preferably has a maximum diameter of at least 5 millimetres, more preferably at least 5.5 millimetres, more preferably at least 6 millimetres, more preferably at least 6.5 millimetres.
  • the maximum diameter of the capsule is preferably less than 9 millimetres, more preferably less than 8.5 millimetres, more preferably less than 8 millimetres, more preferably less than 7.5 millimetres.
  • the capsule maximum diameter may be between 5 millimetres and 9 millimetres, or between 5.5 millimetres and 8.5 millimetres, or between 6 millimetres and 6 millimetres, or between 6.5 millimetres and 7.5 millimetres.
  • the capsule maximum diameter may be around 7 millimetres.
  • the first aerosol-generating substrate within the internal cavity of the capsule may be a solid first aerosol-generating substrate.
  • the internal cavity of the capsule preferably contains at least 50 milligrams of the first aerosol-generating substrate, more preferably at least 100 milligrams of the first aerosol-generating substrate, more preferably at least 150 milligrams of the first aerosol-generating substrate.
  • the internal cavity may contain up to 1000 milligrams of the first aerosol-generating substrate, or up to 750 milligrams of the first aerosol-generating substrate, or up to 500 milligrams of the first aerosol-generating substrate, or up to 250 milligrams of the first aerosol-generating substrate.
  • the internal cavity of the capsule may contain between 50 milligrams and 1000 milligrams of the first aerosolgenerating substrate, or between 100 milligrams and 750 milligrams of the first aerosol-generating substrate, or between 150 milligrams and 500 milligrams of the first aerosol-generating substrate, or between 150 milligrams and 250 milligrams of the first aerosol-generating substrate.
  • the density of the first aerosol-generating substrate within the internal cavity of the capsule may correspond to at least 0.1 milligrams per cubic millimetre of the internal cavity. This corresponds to the total mass of the first aerosol-generating substrate, divided by the total volume of the internal cavity.
  • the density of the first aerosol-generating substrate within the internal cavity of the capsule corresponds to 0.12 milligrams per cubic millimetre of the internal cavity, more preferably at least 0.15 milligrams per cubic millimetre of the internal cavity, more preferably at least 0.18 milligrams per cubic millimetre of the internal cavity, more preferably at least 0.2 milligrams per cubic millimetre more preferably at least 0.22 milligrams per cubic millimetre, more preferably at least 0.25 milligrams per cubic millimetre, more preferably at least 0.28 milligrams per cubic millimetre, more preferably at least 0.3 milligrams per cubic millimetre, more preferably at least 0.32 milligrams per cubic millimetre, more preferably at least 0.35 milligrams per cubic millimetre, more preferably at least 0.38 milligrams per cubic millimetre, more preferably at least 0.4 milligrams per cubic millimetre.
  • the density of the first aerosol-generating substrate within the internal cavity of the capsule may correspond to less than 2 milligrams per cubic millimetre of the internal cavity, more preferably less than 1.9 milligrams per cubic millimetre, more preferably less than 1.8 milligrams per cubic millimetre, more preferably less than 1 .7 milligrams per cubic millimetre, more preferably less than 1 .6 milligrams per cubic millimetre, more preferably less than 1 .5 milligrams per cubic millimetre, more preferably less than 1 .4 milligrams per cubic millimetre, more preferably less than 1.3 milligrams per cubic millimetre, more preferably less than 1.2 milligrams per cubic millimetre, more preferably less than 1 .1 milligrams per cubic millimetre, or more preferably less than 1 milligram per cubic millimetre of the internal cavity.
  • the density of the first aerosol-generating substrate within the internal cavity of the capsule may correspond to between 0.1 milligrams per cubic millimetre and 2 milligrams per cubic millimetre of the internal cavity, or between 0.12 milligrams per cubic millimetre and 1 .9 milligrams per cubic millimetre of the internal cavity, or between 0.15 milligrams per cubic millimetre and 1 .8 milligrams per cubic millimetre of the internal cavity, or between 0.18 milligrams per cubic millimetre and 1.7 milligrams per cubic millimetre of the internal cavity, or between 0.2 milligrams per cubic millimetre and 1 .6 milligrams per cubic millimetre of the internal cavity, or between 0.22 milligrams per cubic millimetre and 1 .5 milligrams per cubic millimetre of the internal cavity, or between 0.25 milligrams per cubic millimetre and 1 .4 milligrams per cubic millimetre of the internal cavity, or between 0.28 milligrams per cubic millimetre and
  • the percentage fill of the internal cavity of the capsule by the first aerosol-generating substrate is preferably at least 50 percent, more preferably at least 60 percent, more preferably at least 70 percent.
  • the percentage fill is preferably less than 90 percent.
  • the percentage fill corresponds to the percentage of the internal cavity of the capsule that is occupied by the first aerosol-generating substrate. It may be advantageous to retain some empty space within the internal cavity to allow for air flow through the internal cavity and for the first aerosol-generating substrate to be heated evenly.
  • the capsule may comprise at least one susceptor within the internal cavity of the capsule.
  • the capsule may comprise one of: a single susceptor element within the internal cavity of the capsule or a plurality of susceptor particles within the internal cavity.
  • the plurality of susceptor particles may comprise a susceptor material and no aerosol-generating substrate.
  • the capsule may be adapted such that one or more airflow pathways is provided through the capsule during heating. This may enable the aerosol generated from the capsule to be drawn through the aerosol-generating article and delivered to the consumer.
  • the capsule may be initially sealed and airtight but adapted such that airflow pathways are created when the aerosolgenerating article is inserted into an aerosol-generating device, for example, through the insertion of an internal heating element or by means of a piercing element which pierces the capsule outer wall and any coatings present thereon.
  • the capsule comprises at least one air inlet and at least one air outlet in the capsule outer wall.
  • the at least one air inlet and the at least one air outlet may define one or more airflow pathways through the internal cavity of the capsule.
  • the at least one air outlet may be provided downstream of the at least one air inlet.
  • the capsule comprises a plurality of air inlets.
  • the capsule may comprise between 2 and 6 air inlets or between 4 and 5 air inlets.
  • the capsule comprises a plurality of air outlets.
  • the capsule may comprise between 2 and 6 air outlets.
  • the number of air outlets may be the same as the number of air inlets, or different. It may be advantageous to provide a greater number of air outlets than air inlets, since the air outlets need to allow the aerosol generated within the capsule to pass out of the capsule into the hollow tubular element.
  • the number and size of the air inlets and air outlets may be adjusted in order to control the airflow through the capsule and also the resistance to draw (RTD) of the aerosol-generating article.
  • RTD resistance to draw
  • the capsule will provide the main source of RTD within the article and the overall RTD of the aerosol-generating article is therefore likely to be very dependent on the RTD of the capsule.
  • Each air inlet and air outlet is preferably in the form of a hole through the capsule outer wall.
  • each hole is spherical, although other shapes may also be suitable.
  • the diameter of each hole should be sufficiently large that the hole cannot easily be blocked, for example, by dust.
  • the diameter of each hole should also be adapted depending on the form and nature of the first aerosol-generating substrate within the internal cavity of the capsule, so that the first aerosol-generating substrate within the internal cavity of the capsule is not lost from the internal cavity, through the hole.
  • each hole forming an air inlet or air outlet has a diameter of at least 0.2 millimetres, more preferably at least 0.25 millimetres, more preferably at least 0.3 millimetres, more preferably at least 0.35 millimetres, more preferably at least 0.4 millimetres, more preferably at least 0.5 millimetres.
  • the diameter of each hole may be less than 2 millimetres, or less than 1.8 millimetres, or less than 1.7 millimetres, or less than 1.6 millimetres, or less than 1.5 millimetres, or less than 1.4 millimetres, or less than 1.3 millimetres, or less than 1.2 millimetres, or less than 1.1 millimetres, or less than 1 millimetre, or less than 0.9 millimetres, or less than 0.8 millimetres.
  • the diameter of each hole may be between 0.2 millimetres and 2 millimetres, or between 0.25 millimetres and 1.8 millimetres, or between 0.3 millimetres and 1.6 millimetres, or between 0.35 millimetres and 1.4 millimetres, or between 0.4 millimetres and 1.2 millimetres, or between 0.45 millimetres and 1 millimetres, or between 0.5 millimetres and 0.9 millimetres or between 0.5 millimetres and 0.8 millimetres.
  • the respective holes should be spaced apart sufficiently so that the presence of the holes does not adversely impact the structural integrity of the capsule.
  • the holes are preferably spaced at least 1 millimetre apart from each other.
  • the at least one air outlet is preferably at least 5 millimetres downstream of the at least one air inlet, more preferably at least 8 millimetres downstream of the at least one air inlet and more preferably at least 10 millimetres downstream of the at least one air inlet. This spacing enables the length of the airflow pathway through the capsule to be maximised.
  • the at least one air outlet is preferably positioned at the downstream end of the capsule.
  • the capsule has a conventional capsule shape, with an elongate cylindrical body and rounded end walls, the at least one air outlet is preferably provided on the downstream end wall.
  • the at least one air inlet may be positioned at the upstream end of the capsule.
  • the at least one air inlet may be provided on the upstream end wall.
  • the at least one air inlet may be provided at least 2 millimetres downstream of the upstream end of the capsule, or at least 3 millimetres downstream of the upstream end of the capsule, or at least 4 millimetres downstream of the upstream end of the capsule, or at least 5 millimetres downstream of the upstream end of the capsule.
  • all of the air inlets should be provided at least this distance from the upstream end, even when the position of the air inlets along the length of the capsule varies.
  • the capsule may comprise a cylindrical wall and rounded end walls at the upstream and downstream ends of the cylindrical wall (as in a conventional capsule shape) and the at least one air inlet may advantageously be provided in the cylindrical wall, downstream of the upstream end wall.
  • This positioning of the at least one air inlet away from the upstream end of the capsule may be particularly beneficial when the first aerosol-generating substrate within the internal cavity of the capsule is in the form of a gel composition, as described above, or any other type of substrate that melts or becomes more viscous upon heating.
  • the at least one air inlet away from the upstream end of the cavity, where the melted substrate may collect this ensures that the risk of the first aerosol-generating substrate leaking from the capsule is minimised. The risk of blockage of the air inlets by the first aerosol-generating substrate is also reduced.
  • the aerosol-generating article may comprise a hollow tubular element.
  • the hollow tubular element extends to the downstream end of the aerosol-generating article.
  • the capsule may be mounted within the hollow tubular element.
  • the capsule may be mounted at an upstream end of the hollow tubular element.
  • the hollow tubular element may comprise a ventilation zone to allow external air to enter the aerosol-generating article.
  • the ventilation zone may be provided downstream of the downstream end of the capsule.
  • the ventilation zone may comprise at least one ventilation perforation.
  • the ventilation zone may comprise a plurality of ventilation perforations through the hollow tubular element.
  • the capsule may be mounted within the hollow tubular element such that the at least one air inlet is not covered or blocked by the wall of the hollow tubular element, in particular, where the at least one air inlet is provided on the cylindrical wall of the capsule, as described above. There are various suitable ways to achieve this, as described below.
  • the hollow tubular element may comprise one or more holes extending through the peripheral wall thereof, which are positioned to coincide with the one or more air inlets on the capsule. With such an arrangement, air can pass from outside of the hollow tubular element, through the peripheral wall thereof and into the at least one air inlet.
  • the capsule may be mounted within the hollow tubular element such that a portion of the capsule extends from the upstream end of the hollow tubular element, whereby the at least one air inlet is positioned outside of the hollow tubular element.
  • at least 20 percent of the length of the capsule protrudes from the hollow tubular element, more preferably at least 30 percent of the length of the capsule.
  • no more than 50 percent of the length of the capsule protrudes from the hollow tubular element.
  • the majority of the capsule is therefore within the hollow tubular element such that the capsule can be securely retained in place.
  • the hollow tubular element may comprise a flange or protrusion extending inwards from the internal surface at the downstream end of the capsule, to prevent the capsule from being pushed downstream further into the hollow tubular element.
  • the hollow tubular element may comprise an annular flange extending from the internal surface.
  • the capsule may be provided with an outer diameter that is less than the internal diameter of the hollow tubular element.
  • This arrangement provides a space between the outer surface of the capsule and the inner surface of the hollow tubular element, such that air can pass between the capsule and the hollow tubular element, to the at least one air inlet. It may be necessary to block the flow of air from the upstream end of the hollow tubular element to the at least one air outlet in the capsule wall. In this way, the main airflow pathway is clearly defined through the capsule and not around the outside.
  • This can be achieved, for example, by providing an annular sealing ring around the capsule, within the hollow tubular element, which seals the space between the capsule and the inner surface of the hollow tubular element at a position downstream of the at least one air inlet.
  • the annular sealing ring advantageously also helps to retain the position of the capsule within the hollow tubular element.
  • the outer diameter of the capsule is preferably at least 0.2 millimetres less than the internal diameter of the hollow tubular element, more preferably at least 0.5 millimetres less than the internal diameter of the hollow tubular element, more preferably at least 0.8 millimetres less than the internal diameter of the hollow tubular element.
  • the outer diameter of the capsule may be up to 2 millimetres less than the internal diameter of the hollow tubular element.
  • the inner surface of the hollow tubular element may be corrugated at the upstream end thereof, to define a plurality of longitudinal channels which are circumferentially arranged to substantially coincide with the at least one air inlet.
  • air can enter the hollow tubular element through the longitudinal channels defined by the corrugated surface and pass along the capsule to the at least one air inlet.
  • the hollow tubular element is preferably corrugated along only a part of its length from the upstream end and not along the full length.
  • the longitudinal channels therefore preferably extend to a position upstream of the at least one air outlet so that there is no flow of air from the upstream end of the hollow tubular element to the at least one air outlet. In this way, the main airflow pathway is clearly defined through the capsule and not around the outside.
  • the capsule containing the first aerosol-generating substrate may be mounted within a hollow tubular element.
  • the hollow tubular element provides the main structural element of the aerosol-generating article.
  • the hollow tubular element extends to the downstream end of the aerosol-generating article.
  • the term “hollow tubular element” denotes a generally elongate element defining a lumen or channel along a longitudinal axis thereof.
  • tubular will be used in the following with reference to a tubular element having a substantially cylindrical cross-section and defining at least channel extending between an upstream end of the tubular element and a downstream end of the tubular element.
  • alternative geometries for example, alternative cross-sectional shapes
  • the hollow tubular element may have the capsule containing the first aerosol-generating substrate mounted at the upstream end, as described above. Further, the hollow tubular element may define an empty cavity downstream of the capsule, which extends along a part or all of the length of the hollow tubular element. The empty cavity may extend from the capsule all of the way to the downstream end of the aerosol-generating article.
  • the aerosol-generating article may therefore be formed with only two elements: the capsule and the hollow tubular element.
  • one or more filter segments may be provided within the hollow tubular element, at the downstream end thereof, as described in more detail below.
  • the empty cavity which may be defined within the hollow tubular element downstream of the capsule preferably has a length of at least 10 millimetres, more preferably at least 12 millimetres and more preferably at least 14 millimetres.
  • the length of the empty cavity may be up to 40 millimetres, or up to 30 millimetres, or up to 25 millimetres.
  • the empty cavity may have a length of between 10 millimetres and 40 millimetres, or between 12 millimetres and 30 millimetres, or between 14 millimetres and 25 millimetres.
  • the hollow tubular element preferably has a total length of at least 25 millimetres, more preferably at least 28 millimetres, more preferably at least 30 millimetres, more preferably at least 32 millimetres, more preferably at least 34 millimetres.
  • the length of the hollow tubular element may be less than 50 millimetres, or less than 48 millimetres, or less than 45 millimetres, or less than 42 millimetres or less than 40 millimetres.
  • the total length of the hollow tubular element may be between 25 millimetres and 50 millimetres, or between 28 millimetres and 48 millimetres, or between 30 millimetres and 45 millimetres, or between 32 millimetres and 42 millimetres, or between 34 millimetres and 40 millimetres.
  • the hollow tubular element may have an outer diameter of between 5 millimetres and 12 millimetres, for example of between 5 millimetres and 10 millimetres or of between 6 millimetres and 8 millimetres.
  • the hollow tubular element may have an external diameter of 7.2 millimetres plus or minus 10 percent.
  • the internal diameter of the hollow tubular element is preferably constant along the length of the hollow tubular element.
  • the lumen or cavity of the hollow tubular segment may have any cross-sectional shape.
  • the lumen of the hollow tubular segment may have a circular cross- sectional shape.
  • the internal diameter of the hollow tubular element is at least 5 millimetres, more preferably at least 5.5 millimetres, more preferably at least 6 millimetres, more preferably at least 6.5 millimetres.
  • the internal diameter of the hollow tubular element is preferably less than 9 millimetres, more preferably less than 8.5 millimetres, more preferably less than 8 millimetres, more preferably less than 7.5 millimetres.
  • the internal diameter may be between 5 millimetres and 9 millimetres, or between 5.5 millimetres and 8.5 millimetres, or between 6 millimetres and 6 millimetres, or between 6.5 millimetres and 7.5 millimetres.
  • the internal diameter may be around 7 millimetres.
  • the hollow tubular element preferably has a wall thickness of at least 100 micrometres, more preferably at least 150 micrometres, more preferably at least 200 micrometres, more preferably at least 250 micrometres, more preferably at least 500 micrometres.
  • the wall thickness of the hollow tubular element may be less than 2 millimetres, preferably less than 1 .5 millimetres and even more preferably less than 1 .25 mm.
  • the wall thickness of the hollow tubular element may be less than 1 millimetre.
  • the wall thickness of the hollow tubular element may be between 100 micrometres and 2 millimetres, or between 150 micrometres and 1 .5 millimetres, or between 200 micrometres and 1 .25 millimetres, or between 250 micrometres and 1 millimetre, or between 500 micrometres and 1 millimetre.
  • the hollow tubular segment may comprise a paper-based material.
  • the hollow tubular segment may comprise at least one layer of paper.
  • the paper may be very rigid paper.
  • the paper may be crimped paper, such as crimped heat resistant paper or crimped parchment paper.
  • a crimped paper may form one or more airflow channels extending around the outside of the capsule.
  • the one or more airflow channels may be particularly advantageous in embodiments in which the capsule comprises at least one of an air inlet and an air outlet on a cylindrical wall of the capsule.
  • the hollow tubular element is formed from cardboard.
  • the hollow tubular element may be a cardboard tube.
  • cardboard is a cost-effective material that provides a balance between being deformable in order to provide ease of insertion of the article into an aerosol-generating device and being sufficiently stiff to provide suitable engagement of the article with the interior of the device.
  • a cardboard tube may therefore provide suitable resistance to deformation or compression during use.
  • the hollow tubular segment may be a paper tube.
  • the hollow tubular segment may be a tube formed from spirally wound paper.
  • the hollow tubular segment may be formed from a plurality of layers of the paper.
  • the paper may have a basis weight of at least about 50 grams per square meter, at least about 60 grams per square meter, at least about 70 grams per square meter, or at least about 90 grams per square meter.
  • the hollow tubular segment may comprise a polymeric material.
  • the hollow tubular segment may comprise a polymeric film.
  • the polymeric film may comprise a cellulosic film.
  • the hollow tubular segment may comprise low density polyethylene (LDPE) or polyhydroxyalkanoate (PHA) fibres.
  • the hollow tube may comprise cellulose acetate tow. Where the hollow tubular segment comprises cellulose acetate tow, the cellulose acetate tow may have a denier per filament of between about 2 and about 4 and a total denier of between about 25 and about 40.
  • the hollow tubular element preferably provides a negligible level of resistance to draw (RTD).
  • RTD resistance to draw
  • the term “negligible level of RTD” is used to describe an RTD of less than 1 mm H2O per 10 millimetres of length of the hollow tubular segment or hollow tubular element, preferably less than 0.4 mm H2O per 10 millimetres of length of the hollow tubular segment or hollow tubular element, more preferably less than 0.1 mm H2O per 10 millimetres of length of the hollow tubular segment or hollow tubular element.
  • the RTD of a hollow tubular element is preferably less than or equal to about 10 millimetres H2O. More preferably, the RTD of a hollow tubular element is less than or equal to about 5 millimetres H2O. Even more preferably, the RTD of a hollow tubular element is less than or equal to about 2.5 millimetres H2O. Even more preferably, the RTD of the hollow tubular element is less than or equal to about 2 millimetres H2O. Even more preferably, the RTD of the hollow tubular element is less than or equal to about 1 millimetre H2O.
  • the RTD of a hollow tubular element may be at least 0 millimetres H2O, or at least about 0.25 millimetres H2O or at least about 0.5 millimetres H2O or at least about 1 millimetre H2O.
  • the RTD of a hollow tubular element may be from about 0 millimetre H2O to about 10 millimetres H2O, preferably from about 0.25 millimetres H2O to about 10 millimetres H2O, preferably from about 0.5 millimetres H2O to about 10 millimetres H2O.
  • the RTD of a hollow tubular element may be from about 0 millimetres H2O to about 5 millimetres H2O, preferably from about 0.25 millimetres H2O to about 5 millimetres H2O preferably from about 0.5 millimetres H2O to about 5 millimetres H2O.
  • the RTD of a hollow tubular element may be from about 1 millimetre H2O to about 5 millimetres H2O.
  • the RTD of a hollow tubular element may be from about 0 millimetres H2O to about 2.5 millimetres H2O, preferably from about 0.25 millimetres H2O to about 2.5 millimetres H2O, more preferably from about 0.5 millimetres H2O to about 2.5 millimetres H2O.
  • the RTD of a hollow tubular element may be from about 0 millimetres H2O to about 2 millimetres H2O, preferably from about 0.25 millimetres H2O to about 2 millimetres H2O, more preferably from about 0.5 millimetres H2O to about 2 millimetres H2O.
  • the RTD of a hollow tubular element is preferably about 0 millimetre H2O.
  • the aerosol-generating article may further comprise a downstream filter segment mounted within the hollow tubular element at a downstream end of the hollow tubular element.
  • the downstream filter segment may extend to the downstream end of the hollow tubular element.
  • the downstream end of the downstream filter segment may define the downstream end of the aerosol-generating article.
  • the inclusion of a downstream filter segment within the hollow tubular element may be useful in order to provide a desired level of RTD for the aerosol-generating article.
  • the downstream filter segment may be located downstream of the capsule and preferably, the capsule and the downstream filter segment are spaced apart in a longitudinal direction such that a cavity is defined between them.
  • the downstream filter segment is located at least 5 millimetres downstream from the downstream end of the capsule, more preferably at least 8 millimetres downstream from the downstream end of the capsule, more preferably at least 10 millimetres downstream from the downstream end of the capsule, more preferably at least 15 millimetres downstream from the downstream end of the capsule.
  • the downstream filter segment is located less than 30 millimetres downstream from the downstream end of the capsule, more preferably less than 25 millimetres downstream from the downstream end of the capsule.
  • the distance defined between the downstream end of the capsule and the downstream filter segment corresponds to the length of the cavity between the capsule and the downstream filter segment.
  • the downstream filter segment is preferably a solid plug, which may also be described as a ‘plain’ plug and is non-tubular.
  • the filter segment therefore preferably has a substantially uniform transverse cross section.
  • the downstream filter segment is preferably formed of a fibrous filtration material.
  • the fibrous filtration material may be for filtering the aerosol that is generated from the first aerosolgenerating substrate and the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall. Suitable fibrous filtration materials would be known to the skilled person.
  • the at least one downstream filter segment comprises a cellulose acetate filter segment formed of cellulose acetate tow.
  • the downstream filter segment may optionally comprise a flavourant, which may be provided in any suitable form.
  • the downstream filter segment may comprise one or more capsules, beads or granules of a flavourant, or one or more flavour loaded threads or filaments.
  • the downstream filter segment has a low particulate filtration efficiency.
  • the downstream filter segment preferably has an external diameter that is approximately equal to the internal diameter of the hollow tubular element, so that the downstream filter segment is retained within the hollow tubular element by means of a friction fit.
  • the external diameter of the downstream filter segment is between 5 millimetres and 12 millimetres, more preferably between 6 millimetres and 10 millimetres, more preferably between 7 millimetres and 8 millimetres.
  • the resistance to draw (RTD) of a component or the aerosolgenerating article is measured in accordance with ISO 6565-2015.
  • the RTD refers the pressure required to force air through the full length of a component.
  • the terms “pressure drop” or “draw resistance” of a component or article may also refer to the “resistance to draw”.
  • Such terms generally refer to the measurements in accordance with ISO 6565-2015 are normally carried out at under test at a volumetric flow rate of 17.5 millilitres per second at the output or downstream end of the measured component at a temperature of 22 degrees Celsius, a pressure of 101 kPa (about 760 Torr) and a relative humidity of 60%.
  • Conditions for smoking and smoking machine specifications are set out in ISO Standard 3308 (ISO 3308:2000).
  • Atmosphere for conditioning and testing are set out in ISO Standard 3402 (ISO 3402:1999).
  • the resistance to draw (RTD) of the downstream filter segment may be at least 0 millimetres H2O, or at least 3 millimetres H2O, or at least 6 millimetres H2O.
  • the RTD of the downstream filter segment may be no greater than 12 millimetres H2O, or no greater than 11 millimetres H2O, or no greater than 10 millimetres H2O.
  • the downstream filter segment may be formed of a fibrous filtration material.
  • the downstream filter segment may be formed of a porous material.
  • the downstream filter segment may be formed of a biodegradable material.
  • the downstream filter segment may be formed of a cellulose material, such as cellulose acetate.
  • a downstream filter segment may be formed from a bundle of cellulose acetate fibres having a denier per filament between 10 and 15.
  • the downstream filter segment may be formed of a polylactic acid-based material.
  • the downstream filter segment may be formed of a bioplastic material, preferably a starch-based bioplastic material.
  • the downstream filter segment may be made by injection moulding or by extrusion.
  • Bioplastic-based materials are advantageous because they are able to provide downstream filter segment structures which are simple and cheap to manufacture with a particular and complex cross-sectional profile, which may comprise a plurality of relatively large air flow channels extending through the downstream filter segment material, that provides suitable RTD characteristics.
  • the length of the downstream filter segment may be at least 5 millimetres, or at least 8 millimetres, or at least 10 millimetres.
  • the length of the downstream filter segment may be less than 20 millimetres, or less than 15 millimetres, or less than 12 millimetres.
  • the length of the downstream filter segment may be between 5 millimetres and 20 millimetres, or between 8 millimetres and 15 millimetres, or between 8 millimetres and 12 millimetres, or between 10 millimetres and 12 millimetres.
  • a downstream filter segment may be provided downstream of the hollow tubular element.
  • the downstream filter segment may extend between the hollow tubular element and the downstream end of the aerosol-generating article.
  • the downstream filter segment may be connected to the hollow tubular element by means of a tipping wrapper.
  • the overall RTD of the aerosol-generating article may be at least 1 millimetre H2O.
  • the overall RTD of the aerosol-generating article may be at least 2 millimetres H 2 O, at least 3 millimetres H 2 O, at least 4 millimetres H 2 O, at least 5 millimetres H 2 O, at least 6 millimetres H 2 O, at least 7 millimetres H 2 O, at least 8 millimetres H 2 O, at least 9 millimetres H 2 O, at least 10 millimetres H 2 O, at least 15 millimetres H 2 O, at least 20 millimetres H 2 O, at least 30 millimetres H 2 O, at least 40 millimetres H 2 O, or at least 50 millimetres H 2 O.
  • the overall RTD of the aerosol-generating article may be no more than 180 millimetres H 2 O.
  • the overall RTD of the aerosol-generating article may be no more than 170 millimetres H 2 O, no more than 160 millimetres H 2 O, no more than 150 millimetres H 2 O, or no more than 140 millimetres H 2 O.
  • the overall RTD of the aerosol-generating article may be between 1 millimetre H 2 O and 180 millimetres H 2 O.
  • the overall RTD of the aerosol-generating article may be between 5 millimetres H 2 O and 170 millimetres H 2 O, between 10 millimetres H 2 O and 160 millimetres H 2 O, between 20 millimetres H 2 O and 150 millimetres H 2 O, or between 50 millimetres H 2 O and 140 millimetres H 2 O.
  • the aerosol-generating article may have an overall length of at least 40 millimetres, or at least 50 millimetres, or at least 60 millimetres.
  • An overall length of an aerosol-generating article may be less than or equal to 90 millimetres, or less than or equal to 85 millimetres, or less than or equal to 80 millimetres.
  • An overall length of the aerosol-generating article is preferably from 40 millimetres to 70 millimetres, more preferably from 45 millimetres to 70 millimetres.
  • An overall length of the aerosol-generating article is preferably from 40 millimetres to 60 millimetres, more preferably from about 45 millimetres to about 60 millimetres.
  • An overall length of the aerosol-generating article is preferably from 40 millimetres to 50 millimetres, more preferably from 45 millimetres to 50 millimetres.
  • An overall length of the aerosol-generating article may be about 45 millimetres.
  • the aerosol-generating article may have an external diameter of at least 5 millimetres, or at least 6 millimetres, or at least 7 millimetres.
  • the aerosol-generating article may have an external diameter of less than or equal to about 12 millimetres, or less than or equal to about 10 millimetres, or less than or equal to about 8 millimetres.
  • the aerosol-generating article may have an external diameter from about 5 millimetres to about 12 millimetres, preferably from about 6 millimetres to about 12 millimetres, more preferably from about 7 millimetres to about 12 millimetres.
  • the aerosol-generating article may have an external diameter from about 5 millimetres to about 10 millimetres, preferably from about 6 millimetres to about 10 millimetres, more preferably from about 7 millimetres to about 10 millimetres.
  • the aerosol-generating article may have an external diameter from about 5 millimetres to about 8 millimetres, preferably from about 6 millimetres to about 8 millimetres, more preferably from about 7 millimetres to about 8 millimetres.
  • the aerosol-generating article may have an external diameter of less than 7 millimetres.
  • the external diameter of the aerosol-generating article may be substantially constant over the whole length of the article. As an alternative, different portions of the aerosol-generating article may have different external diameters.
  • the present invention also relates to an aerosol-generating system comprising: an aerosol-generating article according to the invention as defined above; and an aerosol-generating device comprising a heating element configured to heat the aerosol-generating article.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate of the capsule outer wall may be heated before the first aerosol-generating substrate within the internal cavity of the capsule.
  • the at least one of an aerosol former, a flavorant, and a second aerosol-generating substrate of the capsule outer wall may be heated after the first aerosol-generating substrate within the internal cavity of the capsule.
  • the aerosol-generating device has a distal end and a mouth end.
  • the aerosol-generating device may comprise a body.
  • the body or housing of the aerosol-generating device may define a device cavity for removably receiving the aerosol-generating article at the mouth end of the device.
  • the aerosol-generating device may comprise a heating element or heater for heating the first aerosol-generating substrate and the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall when the aerosol-generating article is received within the device cavity.
  • the device cavity may be referred to as the heating chamber of the aerosol-generating device.
  • the device cavity may extend between a distal end and a mouth, or proximal, end.
  • the distal end of the device cavity may be a closed end and the mouth, or proximal, end of the device cavity may be an open end.
  • An aerosol-generating article may be inserted into the device cavity, or heating chamber, via the open end of the device cavity.
  • the device cavity may be cylindrical in shape so as to conform to the same shape of an aerosol-generating article.
  • the expression “received within” may refer to the fact that a component or element is fully or partially received within another component or element.
  • the expression “aerosolgenerating article is received within the device cavity” refers to the aerosol-generating article being fully or partially received within the device cavity of the aerosol-generating article.
  • the aerosol-generating article may abut the distal end of the device cavity.
  • the aerosol-generating article may be in substantial proximity to the distal end of the device cavity.
  • the distal end of the device cavity may be defined by an end-wall.
  • the length of the device cavity may be between 15 millimetres and 80 millimetres, or between 20 millimetres and 70 millimetres, or between 25 millimetres and 60 millimetres, or between 25 millimetres and 50 millimetres.
  • the length of the device cavity may be between 25 millimetres and 29 millimetres, or between 26 millimetres and 29 millimetres, or between 27 millimetres or 28 millimetres.
  • the capsule When the aerosol-generating article is received within the device cavity, the capsule is preferably fully within the device cavity, in order to optimise the heating of the first aerosolgenerating substrate and the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall.
  • the length of the device cavity is therefore preferably greater than the length of the capsule.
  • a diameter of the device cavity may be between 4 millimetres and 10 millimetres.
  • a diameter of the device cavity may be between 5 millimetres and 9 millimetres.
  • a diameter of the device cavity may be between 6 millimetres and 8 millimetres.
  • a diameter of the device cavity may be between 6 millimetres and 7 millimetres.
  • a diameter of the device cavity may be substantially the same as or greater than a diameter of the aerosol-generating article.
  • a diameter of the device cavity may be the same as a diameter of the aerosol-generating article in order to establish a tight fit with the aerosolgenerating article.
  • the cross-sectional shape of the device cavity may be substantially the same as the cross-sectional shape of the aerosol-generating article.
  • the device cavity may have a substantially circular cross-section
  • the device cavity may be configured to establish a tight fit with an aerosol-generating article received within the device cavity. Tight fit may refer to a snug fit.
  • the aerosol-generating device may comprise a peripheral wall. Such a peripheral wall may define the device cavity, or heating chamber. The peripheral wall defining the device cavity may be configured to engage with an aerosol-generating article received within the device cavity in a tight fit manner, so that there is substantially no gap or empty space between the peripheral wall defining the device cavity and the aerosol-generating article when received within the device.
  • Such a tight fit may establish an airtight fit or configuration between the device cavity and an aerosol-generating article received therein.
  • the tight fit with an aerosol-generating article may be established along the entire length of the device cavity or along a portion of the length of the device cavity.
  • the heating element may be any suitable type of heating element.
  • the heating element may be an external heating element which heats the capsule and its contents externally. Such an external heating element may circumscribe the aerosol-generating article when inserted in or received within the aerosol-generating device.
  • the heating element may be provided about the periphery of the device cavity such that the heating element at least partially surrounds the capsule when the aerosol-generating article is received within the device cavity.
  • the heating element may be an internal heating element which heats the capsule and its contents internally.
  • the heating element may be provided in the device cavity such that the heating element is inserted into the capsule when the aerosol-generating article is received within the device cavity.
  • the heating element may be an elongate heater blade or pin that is adapted to be inserted into the capsule in order to internally heat the capsule and its contents.
  • the heating element may penetrate the capsule when the aerosol-generating article is received within the device cavity.
  • the heating element may penetrate an upstream end of the capsule when the aerosol-generating article is received within the device cavity.
  • One or more lines or areas of weakness may be provided on the upstream end of the capsule which may be configured to be broken by the penetration of the heating element into the upstream end of the capsule when the aerosol-generating article is received within the device cavity.
  • providing one or more lines or areas of weakness provided on the upstream end of the capsule configured to be broken by the penetration of the heating element into the upstream end of the capsule the capsule may ensure that the capsule does not substantially move relative to one or both of the hollow tubular element and the aerosol-generating article when the aerosol-generating article is received within the device cavity.
  • the heater may comprise at least one heating element.
  • the at least one heating element may be any suitable type of heating element.
  • the device comprises only one heating element.
  • the device comprises a plurality of heating elements.
  • the heating element may be a resistive heating element.
  • Suitable materials for forming the resistive heating element include but are not limited to: semiconductors such as doped ceramics, electrically ‘conductive’ ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material. Such composite materials may comprise doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum and metals from the platinum group.
  • suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetai® and iron-manganese-aluminium based alloys.
  • the resistive heating element comprises one or more stamped portions of electrically resistive material, such as stainless steel.
  • the at least one resistive heating element may comprise a heating wire or filament, for example a Ni-Cr (Nickel- Chromium), platinum, tungsten or alloy wire.
  • the heating element comprises an electrically insulating substrate, wherein the at least one resistive heating element is provided on the electrically insulating substrate.
  • the electrically insulating substrate may comprise any suitable material.
  • the electrically insulating substrate may comprise one or more of: paper, glass, ceramic, anodized metal, coated metal, and Polyimide.
  • the ceramic may comprise mica, Alumina (AI2O3) or Zirconia (ZrO2).
  • the electrically insulating substrate has a thermal conductivity of less than or equal to about 40 Watts per metre Kelvin, preferably less than or equal to about 20 Watts per metre Kelvin and ideally less than or equal to about 2 Watts per metre Kelvin.
  • the heater may comprise a heating element comprising a rigid electrically insulating substrate with one or more electrically conductive tracks or wire disposed on its surface.
  • the size and shape of the electrically insulating substrate may allow it to be inserted directly into the capsule. If the electrically insulating substrate is not sufficiently rigid, the heating element may comprise a further reinforcement means.
  • a current may be passed through the one or more electrically conductive tracks to heat the heating element and the first aerosol-generating substrate and the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall.
  • the heater comprises an inductive heating arrangement.
  • the inductive heating arrangement may comprise an inductor coil and a power supply configured to provide high frequency oscillating current to the inductor coil.
  • a high frequency oscillating current means an oscillating current having a frequency of between about 500 kHz and about 30 MHz.
  • the heater may advantageously comprise a DC/ AC inverter for converting a DC current supplied by a DC power supply to the alternating current.
  • the inductor coil may be arranged to generate a high frequency oscillating electromagnetic field on receiving a high frequency oscillating current from the power supply.
  • the inductor coil may be arranged to generate a high frequency oscillating electromagnetic field in the device cavity.
  • the inductor coil may substantially circumscribe the device cavity.
  • the inductor coil may extend at least partially along the length of the device cavity.
  • the heater may comprise an inductive heating element.
  • the inductive heating element may be a susceptor element.
  • a susceptor element may be arranged such that, when the aerosolgenerating article is received in the cavity of the aerosol-generating device, the oscillating electromagnetic field generated by the inductor coil induces a current in the susceptor element, causing the susceptor element to heat up.
  • the aerosol-generating device is preferably capable of generating a fluctuating electromagnetic field having a magnetic field strength (H-field strength) of between 1 and 5 kilo amperes per metre (kA m), preferably between 2 and 3 kA/m, for example about 2.5 kA/m.
  • the electrically-operated aerosol-generating device is preferably capable of generating a fluctuating electromagnetic field having a frequency of between 1 and 30 MHz, for example between 1 and 10 MHz, for example between 5 and 7 MHz.
  • the susceptor element may be located in contact with the first aerosol-generating substrate.
  • a susceptor element is located in the aerosol-generating device.
  • the susceptor element may be located in the cavity.
  • the aerosol-generating device may comprise only one susceptor element.
  • the aerosolgenerating device may comprise a plurality of susceptor elements.
  • the susceptor element is preferably arranged to heat the outer wall of the capsule and any coatings present thereon.
  • the inductor coil is preferably arranged to heat the susceptor of the capsule.
  • the aerosol-generating device may comprise at least one resistive heating element and at least one inductive heating element. In some embodiments the aerosolgenerating device may comprise a combination of resistive heating elements and inductive heating elements.
  • the aerosol-generating device may further comprise a controller.
  • the heater may be controlled by the controller to operate within a defined operating temperature range, below a maximum operating temperature.
  • An operating temperature range between about 150 degrees Celsius and about 300 degrees Celsius in the heating chamber (or device cavity) is preferable.
  • the operating temperature range of the heater may be between about 150 degrees Celsius and about 250 degrees Celsius.
  • the aerosol-generating device may comprise a power supply.
  • the power supply may be a DC power supply.
  • the power supply is a battery.
  • the power supply may be a nickel-metal hydride battery, a nickel cadmium battery, or a lithium-based battery, for example a lithium-cobalt, a lithium-iron-phosphate or a lithium-polymer battery.
  • the power supply may be another form of charge storage device, such as a capacitor.
  • the power supply may require recharging and may have a capacity that allows for the storage of enough energy for one or more user operations, for example one or more aerosolgenerating experiences.
  • the aerosol-generating device may comprise a piercing device for piercing the capsule when the aerosol-generating article is inserted into the device cavity.
  • the piercing of the capsule may be necessary in order to establish one or more airflow pathways through the capsule.
  • the aerosol-generating device may comprise an air-flow channel extending between a channel inlet and a channel outlet.
  • the air-flow channel may be configured to establish a fluid communication between the interior of the device cavity and the exterior of the aerosol-generating device.
  • the air-flow channel of the aerosol-generating device may be defined within the housing of the aerosol-generating device to enable fluid communication between the interior of the device cavity and the exterior of the aerosol-generating device.
  • the air-flow channel may be configured to provide air flow into the article in order to deliver generated aerosol to a user drawing from the mouth end of the article.
  • the air-flow channel of the aerosol-generating device may be defined within, or by, the peripheral wall of the housing of the aerosol-generating device.
  • the air-flow channel of the aerosol-generating device may be defined within the thickness of the peripheral wall or by the inner surface of the peripheral wall, or a combination of both.
  • the air-flow channel may partially be defined by the inner surface of the peripheral wall and may be partially defined within the thickness of the peripheral wall.
  • the inner surface of the peripheral wall defines a peripheral boundary of the device cavity.
  • the present invention also relates to a method of manufacturing a capsule for an aerosolgenerating article.
  • the method comprises providing a capsule outer wall defining an internal cavity.
  • the method also comprises applying an inner coating on at least a part of the inner surface of the capsule outer wall.
  • the method further comprises piercing the capsule outer wall after the application of the inner coating to form at least one of an air inlet and an air outlet.
  • applying the inner coating before the piercing of the capsule outer wall may ensure that the inner coating does not cover the at least one of air inlet and an air outlet.
  • the capsule may comprise any of the optional or preferred features of the capsule described above with respect to the aerosol-generating article of the present invention.
  • the capsule outer wall may be pierced by any suitable method in order to form at least one of an air inlet and an air outlet.
  • the at least one of an air inlet and an air outlet may be provided by laser perforation.
  • the at least one of an air inlet and an air outlet may be provided by piercing the capsule outer wall by mechanical force such as by mechanical pinching of the capsule outer wall.
  • the capsule may be heated to facilitate the piercing process.
  • the method may further comprise providing a first aerosol-generating substrate within the internal cavity of the capsule.
  • the first aerosol-generating substrate may comprise any of the preferred or option features of the first aerosol-generating substrate described above with respect to the aerosol-generating article of the present invention.
  • the method may further comprise providing the capsule as a two-part capsule in the form of two separate parts.
  • the method may further comprise joining the two separate parts together by one or both of a friction fit and an adhesive, wherein the two separate parts may be joined together after applying the inner coating on at least a part of the inner surface of the capsule outer wall and after providing the first aerosol-generating substrate within the internal cavity of the capsule.
  • the inner coating applied on at least a part of the inner surface of the capsule outer wall may comprise at least one of an aerosol former, a flavorant, and a second aerosol generating substrate.
  • the inner coating may comprise any of the preferred or optional features of the inner coating described above with respect to the aerosol-generating article of the present invention.
  • the method may also comprise further steps related to manufacturing an aerosolgenerating article.
  • the method may further comprise the steps of providing a hollow tubular and at least partially inserting the capsule into the hollow tubular element to form an aerosol-generating article.
  • the aerosol-generating article of the method may be the same aerosol-generating article described in other sections of the application and may comprise one or more features of the aerosol-generating article described therein.
  • the hollow tubular element may at least partially overlap the location of the at least one of an air inlet and an air outlet in the capsule outer wall.
  • the hollow tubular element may be pierced using the same or different method to piercing the capsule outer wall in order to form at least one of an air inlet and an air outlet in a wall of the hollow tubular element.
  • the at least one of an air inlet and an air outlet in the capsule outer wall may at least partially overlap the at least one of an air inlet and an air outlet in the wall of the hollow tubular element.
  • the at least one of an air inlet and an air outlet in the capsule outer wall may entirely overlap the at least one of an air inlet and an air outlet in the wall of the hollow tubular element.
  • the capsule outer wall may be pierced after the capsule is at least partially inserted into the hollow tubular element so that both the capsule outer wall and the wall of the hollow tubular element are pierced at the same time.
  • the hollow tubular element may not overlap the location of the at least one of an air inlet and an air outlet in the capsule outer wall.
  • only the capsule outer wall may be pierced to form at least one of an air inlet and an air outlet.
  • Example Ex1 An aerosol-generating article for generating an inhalable aerosol upon heating, the aerosol-generating article comprising: a capsule, the capsule comprising: a capsule outer wall defining an internal cavity; and a first aerosol-generating substrate within the internal cavity of the capsule; at least one of an aerosol former, a flavorant, and a second aerosol generating substrate provided within the capsule outer wall, on a surface of the capsule outer wall, or both within the capsule outer wall and on a surface of the capsule outer wall.
  • Example Ex2 An aerosol-generating article according to Example Ex1 , wherein the capsule comprises an inner coating on at least a part of an inner surface of the capsule outer wall, the inner coating comprising the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate.
  • Example Ex3 An aerosol-generating article according to example Ex2, wherein the inner coating of the capsule is provided on substantially the entire inner surface of the capsule outer wall.
  • Example Ex4 An aerosol-generating article according to example Ex2, wherein the inner coating of the capsule is provided only on a part of the inner surface of the capsule outer wall, optionally wherein the inner coating of the capsule is provided only on a part of the inner surface of the capsule outer wall extending parallel to a longitudinal axis of the capsule.
  • Example Ex5 An aerosol-generating article according to any one of examples Ex2 to Ex4, wherein the inner coating of the capsule has a thickness of greater than or equal to 0.1 micrometres, optionally greater than or equal to 0.2 micrometres, optionally greater than or equal to 0.5 micrometres, optionally greater than or equal to 1 micrometre, optionally greater than or equal to 5 micrometres, optionally greater than or equal to 10 micrometres, optionally greater than or equal to 50 micrometres, optionally greater than or equal to 0.1 millimetres, optionally greater than or equal to 0.15 millimetres or optionally greater than or equal to 0.2 millimetres.
  • Example Ex6 An aerosol-generating article according to any one of examples Ex2 to Ex5, wherein the inner coating of the capsule has a thickness of less than or equal to 1 millimetre, optionally less than or equal to 0.75 millimetres, optionally less than or equal to 0.5 millimetres, optionally less than or equal to 0.4 millimetres, or optionally less than or equal to 0.2 millimetres, optionally less than or equal to 0.15 millimetres, optionally less than or equal to 0.1 millimetres, optionally less than or equal to 50 micrometres, optionally less than or equal to 10 micrometres, optionally less than or equal to 5 micrometres, optionally less than or equal to 1 micrometre, optionally less than or equal to 0.5 micrometres, optionally less than or equal to 0.2 micrometres, or optionally less than or equal to 0.1 micrometres.
  • Example Ex7 An aerosol-generating article according to any one of examples Ex2 to Ex6, wherein the inner coating of the capsule has a mass of greater than or equal to 0.05 micrograms, optionally greater than or equal to 0.1 micrograms, optionally greater than or equal to 0.2 micrograms, optionally greater than or equal to 0.3 micrograms, optionally greater than or equal to 0.4 micrograms, optionally greater than or equal to 0.5 micrograms, optionally greater than or equal to 0.6 micrograms, optionally greater than or equal to 0.7 micrograms, optionally greater than or equal to 0.8 micrograms, optionally greater than or equal to 0.9 micrograms, optionally greater than or equal to 1 microgram, optionally greater than or equal to 10 micrograms, optionally greater than or equal to 50 micrograms, optionally greater than or equal to 100 micrograms, optionally greater than or equal to 0.15 milligrams, optionally greater than or equal to 0.2 milligrams, optionally greater than or equal to 0.25 milligrams, optionally greater than
  • Example Ex8 An aerosol-generating article according to any one of examples Ex2 to Ex7, wherein the inner coating of the capsule has a mass of less than or equal to 2 milligrams, optionally less than or equal to 1.5 milligrams, optionally less than or equal to 1 milligram, or optionally less than or equal to 0.5 milligrams, optionally less than or equal to 0.25 milligrams, less than or equal to 0.2 milligrams, optionally less than or equal to 0.15 milligrams, optionally less than or equal to 100 micrograms, optionally less than or equal to 50 micrograms, optionally less than or equal to 10 micrograms, optionally less than or equal to 1 microgram, optionally less than or equal to 0.9 micrograms, optionally less than or equal to 0.8 micrograms, optionally less than or equal to 0.7 micrograms, optionally less than or equal to 0.6 micrograms, optionally less than or equal to 0.5 micrograms, optionally less than or equal to 0.4 micrograms, optionally less than
  • Example Ex9 An aerosol-generating article according to any one of examples Ex2 to Ex8, wherein the inner coating of the capsule comprises an aerosol former.
  • Example Ex10 An aerosol-generating article according to example Ex9, wherein the inner coating of the capsule comprises greater than or equal to 5 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 10 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 15 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 20 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 25 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 30 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 35 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 40 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 45 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 50 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 60 percent by weight of
  • Example Ex11 An aerosol-generating article according to example Ex9 or Ex10, wherein the inner coating of the capsule comprises less than or equal to 80 percent by weight of aerosol former on a dry weight basis, optionally less than or equal to 75 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 70 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 60 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 50 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 40 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 30 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 25 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 20 percent of aerosol former by weight on a dry weight basis, optionally less than or equal to 15 percent of aerosol former by weight on a dry weight basis, or optionally less than or equal to
  • Example Ex12 An aerosol-generating article according to any one of examples Ex9 to Ex11 , wherein the inner coating of the capsule comprises an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • Example Ex13 An aerosol-generating article according to any one of examples Ex9 to Ex12, wherein the aerosol former of the inner coating of the capsule comprises a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former of the inner coating of the capsule comprises glycerol.
  • the aerosol former of the inner coating of the capsule comprises a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former of the inner coating of the capsule comprises glycerol.
  • Example Ex14 An aerosol-generating article according to any one of examples Ex9 to Ex13, wherein the aerosol former of the inner coating of the capsule comprises an ester of polyhydric alcohol selected from at least one of glycerol monoacetate, glycerol diacetate and glycerol triacetate.
  • Example Ex15 An aerosol-generating article according to any one of examples Ex9 to Ex14, wherein the aerosol former of the inner coating of the capsule comprises an aliphatic ester of mono-, di- or polycarboxylic acids selected from at least one of dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • Example Ex16 An aerosol-generating article according to any one of examples Ex9 to Ex15, wherein the inner coating of the capsule comprises between 5 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 10 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 15 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 20 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 25 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 30 percent and 80 percent by weight of glycerol on a dry weight basis, optionally between 35 percent and 80 percent by weight of glycerol on a dry weight basis, optionally between 40 percent and 80 percent by weight of glycerol on a dry weight basis, optionally between 5 percent by weight and 60 percent by weight of glycerol on a dry weight basis, optionally between 10 percent by weight
  • Example Ex17 An aerosol-generating article according to any one of examples Ex2 to Ex16, wherein the inner coating of the capsule is substantially tobacco free.
  • Example Ex18 An aerosol-generating article according to any of the preceding examples, wherein the inner coating of the capsule comprises a second aerosol-generating substrate.
  • Example Ex19 An aerosol-generating article according to example Ex18, wherein the second aerosol-generating substrate of the inner coating of the capsule comprises nicotine.
  • Example Ex20 An aerosol-generating article according to example Ex19, wherein the inner coating of the capsule comprises at least 0.5 percent by weight of nicotine on a dry weight basis, optionally at least 1 percent by weight of nicotine on a dry weight basis, or optionally at least 2 percent by weight of nicotine on a dry weight basis.
  • Example Ex21 An aerosol-generating article according to example Ex19 or Ex20, wherein the inner coating of the capsule comprises less than or equal to 10 percent by weight of nicotine on a dry weight basis, optionally less than or equal to 8 percent by weight of nicotine on a dry weight basis, or optionally less than or equal to 6 percent by weight of nicotine on a dry weight basis.
  • Example Ex22 An aerosol-generating article according to any one of examples Ex18 to Ex21 , wherein the inner coating of the capsule comprises one or more carboxylic acids, optionally wherein the one or more carboxylic acids is selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids is selected from the group consisting of lactic acid and levulinic acid.
  • the inner coating of the capsule comprises one or more carboxylic acids, optionally wherein the one or more carboxylic acids is selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids is selected from the group consisting of lactic acid and levulinic acid.
  • Example Ex23 An aerosol-generating article according to example Ex22, wherein the inner coating of the capsule comprises greater than or equal to 0.5 percent by weight of carboxylic acid on a dry weight basis, optionally greater than or equal to 1 percent by weight of carboxylic acid on a dry weight basis, or optionally greater than or equal to 2 percent by weight of carboxylic acid on a dry weight basis.
  • Example Ex24 An aerosol-generating article according to example Ex22 or Ex23, wherein the inner coating of the capsule comprises less than or equal to 15 percent by weight of carboxylic acid on a dry weight basis, optionally less than or equal to 10 percent by weight of carboxylic acid on a dry weight basis, or optionally less than or equal to 5 percent by weight of carboxylic acid on a dry weight basis.
  • Example Ex25 An aerosol-generating article according to any one of examples Ex2 to Ex24, wherein the inner coating of the capsule comprises a second aerosol-generating substrate, and wherein the second aerosol-generating substrate is in the form of an aerosol-generating film, optionally wherein the aerosol-generating film comprises a cellulosic based film forming agent, nicotine and an aerosol former.
  • Example Ex26 An aerosol-generating article according to example Ex25, wherein the aerosol-generating film of the inner coating of the capsule comprises glycerol, optionally wherein the aerosol-generating film has a glycerol content of at least 40 percent by weight on a dry weight basis.
  • Example Ex27 An aerosol-generating article according to example Ex25 or Ex26, wherein the cellulosic based film forming agent of the aerosol-generating film of the inner coating of the capsule is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methyl cellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), and combinations thereof, preferably wherein the cellulose based film-forming agent is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), and combinations thereof, and more preferably wherein the cellulose based film-forming agent is hydroxypropyl methylcellulose (HPMC).
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC hydroxyethyl methyl cellulose
  • HEC hydroxyethyl cellulose
  • HPC hydroxyprop
  • Example Ex28 An aerosol-generating article according to any one of examples Ex25 to Ex27, wherein the aerosol-generating film of the inner coating of the capsule comprises between 10 percent and 40 percent of cellulosic based film forming agent by weight on a dry weight basis, optionally between 15 percent and 35 percent of cellulosic based film forming agent by weight on a dry weight basis, or optionally between 20 percent and 30 percent by weight of cellulosic based film forming agent by weight on a dry weight basis.
  • Example Ex29 An aerosol-generating article according to any one of examples Ex25 to Ex28, wherein the aerosol-generating film of the inner coating of the capsule further comprises water, preferably wherein the aerosol-generating film comprises less than or equal to 30 percent by weight of water.
  • Example Ex30 An aerosol-generating article according to any one of examples Ex25 to Ex29, wherein the aerosol-generating film of the inner coating of the capsule further comprises a cellulose based strengthening agent, optionally wherein the cellulose based strengthening agent is selected from the group consisting of cellulose fibres, microcrystalline cellulose (MCC), cellulose powder, and combinations thereof.
  • a cellulose based strengthening agent is selected from the group consisting of cellulose fibres, microcrystalline cellulose (MCC), cellulose powder, and combinations thereof.
  • Example Ex31 An aerosol-generating article according to example Ex30, wherein the aerosol-generating film of the inner coating of the capsule comprises between 0.5 percent and 40 percent by weight of cellulose based strengthening agent on a dry weight basis, optionally between 5 percent and 30 percent by weight of cellulose based strengthening agent on a dry weight basis, or optionally between 10 percent and 25 percent by weight of cellulose based strengthening agent on a dry weight basis.
  • Example Ex32 An aerosol-generating article according to any one of examples Ex25 to Ex31 , wherein the aerosol-generating film of the inner coating of the capsule further comprises carboxymethyl cellulose, preferably wherein the carboxymethyl cellulose is sodium carboxymethyl cellulose.
  • Example Ex33 An aerosol-generating article according to example Ex32, wherein the aerosol-generating film of the inner coating of the capsule comprises between 1 percent and 15 percent by weight of carboxymethyl cellulose on a dry weight basis, optionally between 2 percent and 12 percent by weight of carboxymethyl cellulose on a dry weight basis, or optionally between 4 percent and 10 percent by weight of carboxymethyl cellulose on a dry weight basis.
  • Example Ex34 An aerosol-generating article according to any one of examples Ex25 to Ex33, wherein the aerosol-generating film of the inner coating of the capsule has a thickness of between 50 micrometres and 1 millimetre, optionally between 0.1 millimetres and 0.75 millimetres, optionally between 0.1 millimetres and 0.5 millimetres, optionally between 0.1 millimetres and 0.4 millimetres, optionally between 0.1 millimetres and 0.2 millimetres, optionally between 0.15 millimetres and 0.5 millimetres, optionally between 0.2 millimetres and 0.4 millimetres, or optionally between 0.1 millimetres and 0.2 millimetres.
  • Example Ex35 An aerosol-generating article according to any one of examples Ex2 to Ex34, wherein the inner coating of the capsule comprises a second aerosol-generating substrate, and wherein the second aerosol-generating substrate is in the form of a gel composition comprising an aerosol former and at least one gelling agent.
  • Example Ex36 An aerosol-generating article according to example Ex35, wherein the gel composition of the inner coating of the capsule comprises glycerol, optionally wherein the gel composition of the inner coating has a glycerol content of at least 40 percent by weight on a dry weight basis.
  • Example Ex37 An aerosol-generating article according to example Ex35 or Ex36, wherein the gel composition of the inner coating of the capsule comprises a total amount of gelling agents between 0.4 percent and 10 percent by weight on a dry weight basis, between 0.5 percent and 8 percent by weight on a dry weight basis, optionally between 1 percent and 6 percent by weight on a dry weight basis, optionally between 2 percent and 4 percent by weight on a dry weight basis, or optionally between 2 percent and 3 percent by weight on a dry weight basis.
  • the gel composition of the inner coating of the capsule comprises a total amount of gelling agents between 0.4 percent and 10 percent by weight on a dry weight basis, between 0.5 percent and 8 percent by weight on a dry weight basis, optionally between 1 percent and 6 percent by weight on a dry weight basis, optionally between 2 percent and 4 percent by weight on a dry weight basis, or optionally between 2 percent and 3 percent by weight on a dry weight basis.
  • Example Ex38 An aerosol-generating article according to any one of examples Ex35 to 37, wherein the gel composition of the inner coating of the capsule includes a hydrogen-bond crosslinking gelling agent, optionally wherein the hydrogen-bond crosslinking gelling agent includes one or more of a galactomannan, gelatin, agarose, konjac gum or agar, preferably wherein the hydrogen-bond crosslinking gelling agent includes agar.
  • Example Ex39 An aerosol-generating article according to any one of examples Ex35 to 37, wherein the gel composition of the inner coating of the capsule includes a hydrogen-bond crosslinking gelling agent, optionally wherein the hydrogen-bond crosslinking gelling agent includes one or more of a galactomannan, gelatin, agarose, konjac gum or agar, preferably wherein the hydrogen-bond crosslinking gelling agent includes agar.
  • Example Ex39 An aerosol-generating article according to any one of examples Ex35 to
  • the gel composition of the inner coating of the capsule includes an ionic crosslinking gelling agent, optionally wherein the ionic crosslinking gelling agent includes one or more of low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate, preferably wherein the hydrogen-bond crosslinking gelling agent includes low acyl gellan.
  • Example Ex40 An aerosol-generating article according to any one of examples Ex35 to
  • the gelling agent of the gel composition of the inner coating of the capsule includes one or more biopolymers, optionally wherein the biopolymers include gellan gums, xanthan gum, alginates (alginic acid), agar, guar gum, preferably wherein the biopolymers includes xanthan gum.
  • Example Ex41 An aerosol-generating article according to any one of examples Ex35 to
  • the gel composition of the inner coating of the capsule includes a viscosifying agent, optionally wherein the gel composition includes the viscosifying agent in an amount between 0.2 percent and 5 percent by weight on a dry weight basis, optionally between 0.5 percent and 3 percent by weight on a dry weight basis, optionally between 0.5 percent and 2 percent by weight on a dry weight basis, or optionally between 1 percent and 2 percent by weight on a dry weight basis.
  • Example Ex42 An aerosol-generating article according to example Ex41 , wherein the viscosifying agent of the gel composition of the inner coating of the capsule includes one or more of xanthan gum, carboxymethyl-cellulose, microcrystalline cellulose, methyl cellulose, gum Arabic, guar gum, lambda carrageenan, or starch, preferably wherein the viscosifying agent includes xanthan gum.
  • Example Ex43 An aerosol-generating article according to any one of examples Ex35 to
  • the gel composition of the inner coating of the capsule includes a divalent cation.
  • Example Ex44 An aerosol-generating article according to any one of examples Ex35 to
  • the gel composition of the inner coating of the capsule further comprises water, optionally wherein the gel composition of the inner coating of the capsule comprises between 8 percent and 32 percent by weight of water, optionally between 15 percent and 25 percent by weight of water, optionally between 18 percent and 22 percent by weight of water, or optionally about 20 percent by weight of water.
  • Example Ex45 An aerosol-generating article according to any of the preceding examples, wherein the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate is dispersed within the capsule outer wall, optionally wherein the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate is uniformly dispersed within substantially all of the capsule outer wall.
  • Example Ex46 An aerosol-generating article according to example Ex45, wherein a second aerosol-generating substrate is dispersed within the capsule outer wall.
  • Example Ex47 An aerosol-generating article according to example Ex46, wherein the second aerosol-generating substrate dispersed within the capsule outer wall comprises nicotine.
  • Example Ex48 An aerosol-generating article according to example Ex46 or 47, wherein the second aerosol-generating substrate dispersed within the capsule outer wall comprises one or more carboxylic acids.
  • Example Ex49 An aerosol-generating article according to example Ex48, wherein the one or more carboxylic acids of the second aerosol-generating substrate dispersed within the capsule outer wall are selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids of the second aerosolgenerating substrate dispersed within the capsule outer wall is selected from the group consisting of lactic acid and levulinic acid.
  • Example Ex50 An aerosol-generating article according to any one of examples Ex45 to Ex49, wherein the capsule outer wall is substantially tobacco free.
  • Example Ex51 An aerosol-generating article according to any one of examples Ex45 to Ex50, wherein an aerosol former is dispersed within the capsule outer wall.
  • Example Ex52 An aerosol-generating article according to example Ex51 , wherein the aerosol former dispersed within the capsule outer wall comprises an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • Example Ex53 An aerosol-generating article according to example Ex51 or Ex52, wherein the aerosol former dispersed within the capsule outer wall comprises a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former dispersed within the capsule outer wall comprises glycerol.
  • a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former dispersed within the capsule outer wall comprises glycerol.
  • Example Ex54 An aerosol-generating article according to any one of examples Ex51 to Ex53, wherein the aerosol former dispersed within the capsule outer wall comprises an ester of polyhydric alcohol selected from at least one of glycerol monoacetate, glycerol diacetate and glycerol triacetate.
  • Example Ex55 An aerosol-generating article according to any one of examples Ex51 to Ex54, wherein the aerosol former dispersed within the capsule outer wall comprises an aliphatic ester of mono-, di- or polycarboxylic acids selected from at least one of dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • Example Ex56 An aerosol-generating article according to any one of examples Ex45 to Ex55, wherein one or more flavorants are dispersed within the capsule outer wall.
  • Example Ex57 An aerosol-generating article according to any of the preceding examples, wherein the capsule comprises the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate both in an inner coating on at least a part of an inner surface of the capsule outer wall and dispersed within the capsule outer wall.
  • Example Ex58 An aerosol-generating article according to example Ex57, wherein the capsule comprises a second aerosol-generating substrate both in the inner coating on at least a part of an inner surface of the capsule outer wall and dispersed within the capsule outer wall, optionally wherein the second aerosol-generating substrate comprises nicotine.
  • Example Ex59 An aerosol-generating article according to any of the preceding examples, wherein the capsule outer wall is formed of an air impermeable material.
  • Example Ex60 An aerosol-generating article according to any of the preceding examples, wherein the capsule outer wall is formed of a porous material.
  • Example Ex61 An aerosol-generating article according to any of the preceding examples, wherein the capsule outer wall comprises a polymeric material or a cellulose-based material.
  • Example Ex62 An aerosol-generating article according to example Ex61 , wherein the capsule outer wall comprises one or more of polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), gelatin and hydroxypropyl methyl cellulose (HPMC).
  • PE polyethylene
  • PP polypropylene
  • PVC polyvinylchloride
  • PET polyethylene terephthalate
  • PDA polylactic acid
  • CA cellulose acetate
  • HPMC hydroxypropyl methyl cellulose
  • Example Ex63 An aerosol-generating article according to example Ex61 or Ex62, wherein the capsule outer wall comprises one or more of medical grade polymers, optionally selected from one or more of ALTUGLAS® Medical Resins Polymethylmethacrylate (PMMA) , Chevron Phillips K- Resin® Styrene-butadiene copolymer (SBC), Arkema special performance polymers Pebax®, Rilsan®, and Rilsan® Clear, DOW (Health+TM) Low-Density Polyethylene (LDPE) , DOWTM LDPE 91003, DOWTM LDPE 91020 (MFI 2.0; density 923), ExxonMobilTM Polypropylene (PP) PP1013H1 , PP1014H1 and PP9074MED, Trinseo CALIBRETM Polycarbonate (PC) 2060- SERIES.
  • PMMA ALTUGLAS® Medical Resins Polymethylmethacrylate
  • SBC Chevron Phillips K- Resin®
  • Example Ex64 An aerosol-generating article according to any of the preceding examples, wherein the capsule outer wall is formed of a pierceable or frangible material.
  • Example Ex65 An aerosol-generating article according to any of the preceding examples, wherein an upstream end of the capsule outer wall comprises one or more lines or areas of weakness.
  • Example Ex66 An aerosol-generating article according to any of the preceding examples, wherein the capsule comprises an external coating on at least a part of an outer surface of the capsule outer wall.
  • Example Ex67 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity of the capsule is a solid first aerosol-generating substrate.
  • Example Ex68 An aerosol-generating article according to example Ex67, wherein the capsule contains a plurality of particles of the solid first aerosol-generating substrate within the internal cavity.
  • Example Ex69 An aerosol-generating article according to example Ex68, wherein the plurality of particles of solid first aerosol-generating substrate includes at least one of a plurality of beads, pellets, granules, strips, shreds or flakes.
  • Example Ex70 An aerosol-generating article according to example Ex68 or Ex69, wherein the particles of solid first aerosol-generating substrate within the internal cavity of the capsule each have a maximum dimension of greater than or equal to 0.05 millimetres, optionally greater than or equal to 0.1 millimetres, optionally greater than or equal to 0.15 millimetres, optionally greater than or equal to 0.2 millimetres, optionally greater than or equal to 0.25 millimetres, optionally greater than or equal to 0.5 millimetres, optionally greater than or equal to 0.75 millimetres, or optionally greater than or equal to 1 millimetre.
  • Example Ex71 An aerosol-generating article according to any one of examples Ex68 to Ex70, wherein the particles of solid first aerosol-generating substrate within the internal cavity of the capsule each have a maximum dimension of less than or equal to 10 millimetres, optionally less than or equal to 9 millimetres, optionally less than or equal to 8 millimetres, optionally less than or equal to 6 millimetres, or optionally less than or equal to 5 millimetres.
  • Example Ex72 An aerosol-generating article according to any one of examples Ex68 to Ex71 , wherein the number of particles of solid first aerosol-generating substrate within the internal cavity of the capsule is greater than or equal to 2, optionally greater than or equal to 5, optionally greater than or equal to 10, optionally greater than or equal to 20, or optionally greater than or equal to 30.
  • Example Ex73 An aerosol-generating article according to any one of examples Ex68 to Ex72, wherein the number of particles of solid first aerosol-generating substrate within the internal cavity of the capsule is less than or equal to 200.
  • Example Ex74 An aerosol-generating article according to example Ex68, wherein the solid first aerosol-generating substrate within the internal cavity of the capsule is in the form of a powder.
  • Example Ex75 An aerosol-generating article according to example Ex74, wherein the powder is in the form of particles having a D50 size of between 50 micrometres and 80 micrometres, optionally between 50 micrometres and 75 micrometres, optionally between 55 micrometres and 75 micrometres, optionally between 55 micrometres and 70 micrometres, or optionally between 60 micrometres and 70 micrometres.
  • Example Ex76 An aerosol-generating article according to example Ex74 or Ex75, wherein the powder is in the form of particles having a D95 size of between 80 micrometres and 130 micrometres, optionally between 90 micrometres and 125 micrometres, optionally between 100 micrometres and 120 micrometres, or optionally between 110 micrometres and 120 micrometres.
  • Example Ex77 An aerosol-generating article according to any one of examples Ex74 to Ex76, wherein the powder is in the form of particles having a maximum diameter of between 50 micrometres and 250 micrometres, optionally between 80 micrometres and 225 micrometres, or optionally between 100 micrometres and 125 micrometres.
  • Example Ex78 An aerosol-generating article according to example Ex67, wherein the solid first aerosol-generating substrate is in the form of one or more sheets, optionally wherein the one or more sheets have been one or more of crimped, folded, gathered and pleated, optionally wherein the one or more sheets have been cut into strands.
  • Example Ex79 An aerosol-generating article according to any one of examples Ex68 to Ex78, further comprising at least one susceptor within the internal cavity of the capsule.
  • Example Ex80 An aerosol-generating article according to example Ex79, wherein the capsule comprises one of: a single susceptor element within the internal cavity of the capsule or a plurality of susceptor particles within the internal cavity wherein the plurality of susceptor particles comprise a susceptor material and no aerosol-generating substrate.
  • Example Ex81 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity comprises an aerosol former.
  • Example Ex82 An aerosol-generating article according example Ex81 , wherein the first aerosol-generating substrate within the internal cavity comprises greater than or equal to 15 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 20 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 25 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 30 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 35 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 40 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 45 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 50 percent by weight of aerosol former on a dry weight basis, optionally greater than or equal to 60 percent by weight of aerosol former on a dry weight basis, or optionally greater than or equal to 70 percent by weight of aerosol former on a dry weight basis.
  • Example Ex83 An aerosol-generating article according to example Ex81 or Ex82, wherein the first aerosol-generating substrate within the internal cavity comprises less than or equal to 80 percent by weight of aerosol former on a dry weight basis, optionally less than or equal to 75 percent of aerosol former by weight on a dry weight basis, or optionally less than or equal to 70 percent of aerosol former by weight on a dry weight basis.
  • Example Ex84 An aerosol-generating article according to any one of examples Ex81 to Ex83, wherein the first aerosol-generating substrate within the internal cavity comprises an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • an aerosol former selected from at least one of polyhydric alcohols, esters of polyhydric alcohols and aliphatic esters of mono-, di- or polycarboxylic acids.
  • Example Ex85 An aerosol-generating article according to any one of examples Ex81 to Ex84, wherein the aerosol former of the first aerosol-generating substrate within the internal cavity comprises a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former of the first aerosol-generating substrate within the internal cavity comprises glycerol.
  • the aerosol former of the first aerosol-generating substrate within the internal cavity comprises a polyhydric alcohol selected from at least one of triethylene glycol, propylene glycol, 1 ,3-butanediol and glycerol, preferably wherein the aerosol former of the first aerosol-generating substrate within the internal cavity comprises glycerol.
  • Example Ex86 An aerosol-generating article according to any one of examples Ex81 to Ex85, wherein the aerosol former of the first aerosol-generating substrate within the internal cavity comprises an ester of polyhydric alcohol selected from at least one of glycerol monoacetate, glycerol diacetate and glycerol triacetate.
  • Example Ex87 An aerosol-generating article according to any one of examples Ex81 to Ex86, wherein the aerosol former of the first aerosol-generating substrate within the internal cavity comprises an aliphatic ester of mono-, di- or polycarboxylic acids selected from at least one of dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • Example Ex88 An aerosol-generating article according to any one of examples Ex81 to Ex83, wherein the first aerosol-generating substrate within the internal cavity comprises between 15 percent and 80 percent by weight of glycerol on a dry weight basis, optionally between or between 20 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 25 percent by weight and 80 percent by weight of glycerol on a dry weight basis, optionally between 30 percent by weight and 75 percent by weight of glycerol on a dry weight basis, optionally between 35 percent by weight and 75 percent by weight of glycerol on a dry weight basis, optionally between 40 percent by weight and 70 percent by weight of glycerol on a dry weight basis, optionally between 45 percent by weight and 70 percent by weight of glycerol on a dry weight basis, or optionally between 50 percent by weight and 70 percent by weight of glycerol on a dry weight basis.
  • Example Ex89 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity comprises nicotine.
  • Example Ex90 An aerosol-generating article according to example Ex89, wherein the first aerosol-generating substrate within the internal cavity comprises at least 0.5 percent by weight of nicotine on a dry weight basis, optionally at least 1 percent by weight of nicotine on a dry weight basis, or optionally at least 2 percent by weight of nicotine on a dry weight basis.
  • Example Ex91 An aerosol-generating article according to example Ex89 or Ex90, wherein the first aerosol-generating substrate within the internal cavity comprises less than or equal to 10 percent by weight of nicotine on a dry weight basis, optionally less than or equal to 8 percent by weight of nicotine on a dry weight basis, or optionally less than or equal to 6 percent by weight of nicotine on a dry weight basis.
  • Example Ex92 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity comprises one or more carboxylic acids, optionally wherein the one or more carboxylic acids is selected from the group consisting of acid, benzoic acid, fumaric acid and levulinic acid, preferably wherein the one or more carboxylic acids is selected from the group consisting of lactic acid and levulinic acid.
  • Example Ex93 An aerosol-generating article according to example Ex92, wherein the first aerosol-generating substrate within the internal cavity comprises greater than or equal to 0.5 percent by weight of carboxylic acid on a dry weight basis, optionally greater than or equal to 1 percent by weight of carboxylic acid on a dry weight basis, or optionally greater than or equal to 2 percent by weight of carboxylic acid on a dry weight basis.
  • Example Ex94 An aerosol-generating article according to example Ex92 or Ex93, wherein the first aerosol-generating substrate within the internal cavity comprises less than or equal to 15 percent by weight of carboxylic acid on a dry weight basis, optionally less than 10 percent by weight of carboxylic acid on a dry weight basis, or optionally less than 5 percent by weight of carboxylic acid on a dry weight basis.
  • Example Ex95 An aerosol-generating article according to any one of example Ex92 to Ex94, wherein the first aerosol-generating substrate within the internal cavity comprises between 0.5 percent and 15 percent by weight of carboxylic acid on a dry weight basis, optionally between 1 percent and 10 percent by weight of carboxylic acid on a dry weight basis, optionally between
  • Example Ex96 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity is substantially tobacco free.
  • Example Ex97 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity in the form of an aerosolgenerating film, optionally wherein the aerosol-generating film comprises a cellulosic based film forming agent, nicotine and an aerosol former.
  • Example Ex98 An aerosol-generating article according to example Ex97, wherein the aerosol-generating film within the internal cavity comprises glycerol, optionally wherein the aerosol-generating film has a glycerol content of at least 40 percent by weight on a dry weight basis.
  • Example Ex99 An aerosol-generating article according to example Ex97 or Ex98, wherein the cellulosic based film forming agent of the aerosol-generating film within the internal cavity is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methyl cellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), and combinations thereof, preferably wherein the cellulose based film-forming agent is selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), and combinations thereof, and more preferably wherein the cellulose based film-forming agent is hydroxypropyl methylcellulose (HPMC).
  • HPMC hydroxypropyl methylcellulose
  • MC methylcellulose
  • EC hydroxyethyl methyl cellulose
  • HEC hydroxyethyl cellulose
  • HPC hydroxypropyl
  • Example Ex100 An aerosol-generating article according to any one of example Ex97 to Ex99, wherein the aerosol-generating film within the internal cavity comprises between 10 percent and 40 percent of cellulosic based film forming agent by weight on a dry weight basis, optionally between 15 percent and 35 percent of cellulosic based film forming agent by weight on a dry weight basis, or optionally between 20 percent and 30 percent by weight of cellulosic based film forming agent by weight on a dry weight basis.
  • Example Ex101 An aerosol-generating article according to any one of example Ex97 to Ex100, wherein the aerosol-generating film within the internal cavity further comprises water, preferably wherein the aerosol-generating film comprises less than or equal to 30 percent by weight of water.
  • Example Ex102 An aerosol-generating article according to any one of examples Ex97 to Ex101 , wherein the aerosol-generating film within the internal cavity further comprises a cellulose based strengthening agent, optionally wherein the cellulose based strengthening agent is selected from the group consisting of cellulose fibres, microcrystalline cellulose (MCC), cellulose powder, and combinations thereof.
  • MCC microcrystalline cellulose
  • Example Ex103 An aerosol-generating article according to example Ex102, wherein the aerosol-generating film within the internal cavity comprises between 0.5 percent and 40 percent by weight of cellulose based strengthening agent on a dry weight basis, optionally between 5 percent and 30 percent by weight of cellulose based strengthening agent on a dry weight basis, or optionally between 10 percent and 25 percent by weight of cellulose based strengthening agent on a dry weight basis.
  • Example Ex104 An aerosol-generating article according to any one of examples Ex97 to Ex103, wherein the aerosol-generating film within the internal cavity further comprises carboxymethyl cellulose, preferably wherein the carboxymethyl cellulose is sodium carboxymethyl cellulose.
  • Example Ex105 An aerosol-generating article according to example Ex104, wherein the aerosol-generating film within the internal cavity comprises between 1 percent and 15 percent by weight of carboxymethyl cellulose on a dry weight basis, optionally between 2 percent and 12 percent by weight of carboxymethyl cellulose on a dry weight basis, or optionally between 4 percent and 10 percent by weight of carboxymethyl cellulose on a dry weight basis.
  • Example Ex106 An aerosol-generating article according to any one of examples Ex97 to Ex105, wherein the aerosol-generating film within the internal cavity has a thickness between 50 micrometres and 1 millimetre, optionally between 0.1 millimetres and 1 millimetre, optionally between 0.1 millimetres and 0.75 millimetres, optionally between 0.1 millimetres and 0.5 millimetres, optionally between 0.1 millimetres and 0.4 millimetres, optionally between 0.1 millimetres and 0.2 millimetres, optionally between 0.15 millimetres and 0.5 millimetres, optionally between 0.2 millimetres and 0.4 millimetres, or optionally between 0.1 millimetres and 0.2 millimetres.
  • Example Ex107 An aerosol-generating article according to any one of examples Ex97 to Ex106, wherein the aerosol-generating film within the internal cavity is provided on a carrier element.
  • Example Ex108 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity comprises a gel composition comprising at least one gelling agent.
  • Example Ex109 An aerosol-generating article according to example Ex108, wherein the gel composition of the first aerosol-generating substrate within the internal cavity comprises a total amount of gelling agents between 0.4 percent and 10 percent by weight on a dry weight basis, between 0.5 percent and 8 percent by weight on a dry weight basis, optionally between 1 percent and 6 percent by weight on a dry weight basis, optionally between 2 percent and 4 percent by weight on a dry weight basis, or optionally between 2 percent and 3 percent by weight on a dry weight basis.
  • Example Ex110 An aerosol-generating article according to example Ex108 or Ex109, wherein the gel composition of the first aerosol-generating substrate within the internal cavity includes a hydrogen-bond crosslinking gelling agent, optionally wherein the hydrogen-bond crosslinking gelling agent includes one or more of a galactomannan, gelatin, agarose, konjac gum or agar, preferably wherein the hydrogen-bond crosslinking gelling agent includes agar.
  • a hydrogen-bond crosslinking gelling agent optionally wherein the hydrogen-bond crosslinking gelling agent includes one or more of a galactomannan, gelatin, agarose, konjac gum or agar, preferably wherein the hydrogen-bond crosslinking gelling agent includes agar.
  • Example Ex11 1 An aerosol-generating article according to any one of examples Ex108 to Ex110, wherein the gel composition of the first aerosol-generating substrate within the internal cavity includes an ionic crosslinking gelling agent, optionally wherein the ionic crosslinking gelling agent includes one or more of low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate, preferably wherein the hydrogen-bond crosslinking gelling agent includes low acyl gellan.
  • the gel composition of the first aerosol-generating substrate within the internal cavity includes an ionic crosslinking gelling agent, optionally wherein the ionic crosslinking gelling agent includes one or more of low acyl gellan, pectin, kappa carrageenan, iota carrageenan or alginate, preferably wherein the hydrogen-bond crosslinking gelling agent includes low acyl gellan.
  • Example Ex112 An aerosol-generating article according to any one of examples Ex108 to Ex11 1 , wherein the gelling agent of the gel composition of the first aerosol-generating substrate within the internal cavity includes one or more biopolymers, optionally wherein the biopolymers include gellan gums, xanthan gum, alginates (alginic acid), agar, guar gum, preferably wherein the biopolymers includes xanthan gum.
  • the biopolymers include gellan gums, xanthan gum, alginates (alginic acid), agar, guar gum, preferably wherein the biopolymers includes xanthan gum.
  • Example Ex113 An aerosol-generating article according to any one of examples Ex108 to Ex112, wherein the gel composition of the first aerosol-generating substrate within the internal cavity includes a viscosifying agent, optionally wherein the gel composition includes the viscosifying agent in an amount between 0.2 percent and 5 percent by weight on a dry weight basis, optionally between 0.5 percent and 3 percent by weight on a dry weight basis, optionally between 0.5 percent and 2 percent by weight on a dry weight basis, or optionally between 1 percent and 2 percent by weight on a dry weight basis.
  • a viscosifying agent optionally wherein the gel composition includes the viscosifying agent in an amount between 0.2 percent and 5 percent by weight on a dry weight basis, optionally between 0.5 percent and 3 percent by weight on a dry weight basis, optionally between 0.5 percent and 2 percent by weight on a dry weight basis, or optionally between 1 percent and 2 percent by weight on a dry weight basis.
  • Example Ex114 An aerosol-generating article according to example Ex1 13, wherein the viscosifying agent of the gel composition of the first aerosol-generating substrate within the internal cavity includes one or more of xanthan gum, carboxymethyl-cellulose, microcrystalline cellulose, methyl cellulose, gum Arabic, guar gum, lambda carrageenan, or starch, preferably wherein the viscosifying agent includes xanthan gum.
  • Example Ex115 An aerosol-generating article according to any one of examples Ex108 to Ex114, wherein the gel composition of the first aerosol-generating substrate within the internal cavity includes a divalent cation.
  • Example Ex116 An aerosol-generating article according to any of the preceding examples, wherein the internal cavity has a volume of greater than or equal to 250 cubic millimetres, optionally greater than or equal to 400 cubic millimetres, optionally greater than or equal to 500 cubic millimetres, or optionally greater than or equal to 600 cubic millimetres.
  • Example Ex117 An aerosol-generating article according to any of the preceding examples, wherein the internal cavity has a volume of less than or equal to 2000 cubic millimetres, optionally less than or equal to 1500 cubic millimetres, or optionally less than or equal to 1000 cubic millimetres.
  • Example Ex118 An aerosol-generating article according to any of the preceding examples, wherein the capsule has a length of greater than or equal to 10 millimetres, optionally greater than or equal to 12 millimetres, optionally greater than or equal to 15 millimetres, or optionally greater than or equal to 18 millimetres.
  • Example Ex119 An aerosol-generating article according to any of the preceding examples, wherein the capsule has a length of less than or equal to 30 millimetres, optionally less than or equal to 28 millimetres, or optionally less than or equal to 25 millimetres.
  • Example Ex120 An aerosol-generating article according to any of the preceding examples, wherein the capsule has a maximum diameter of greater than or equal to 5 millimetres, optionally greater than or equal to 5.5 millimetres, optionally greater than or equal to 6 millimetres, or optionally greater than or equal to 6.5 millimetres.
  • Example Ex121 An aerosol-generating article according to any of the preceding examples, wherein the capsule has a maximum diameter of less than or equal to 9 millimetres, optionally less than or equal to 8.5 millimetres, optionally less than or equal to 8 millimetres, or optionally less than or equal to 7.5 millimetres.
  • Example Ex122 An aerosol-generating article according to any of the preceding examples, wherein the capsule has the shape of one of a sphero-cylinder, sphere or ovoid.
  • Example Ex123 An aerosol-generating article according to any of the preceding examples, wherein the capsule is a two-part capsule in the form of two separate parts, optionally wherein the two separate parts are joined together by one or both of a friction fit and an adhesive, optionally wherein one of the two separate parts defines the upstream end of the capsule and the other one of the two separate parts defines the downstream end of the capsule, optionally wherein the two separate parts have one or more of a different size and shape to each other.
  • Example Ex124 An aerosol-generating article according to any of the preceding examples, wherein the internal cavity contains greater than or equal to 50 milligrams of the first aerosol-generating substrate, optionally greater than or equal to 100 milligrams of the first aerosol-generating substrate, or optionally greater than or equal to 150 milligrams of the first aerosol-generating substrate.
  • Example Ex125 An aerosol-generating article according to any of the preceding examples, wherein the internal cavity contains less than or equal to 1000 milligrams of the first aerosol-generating substrate, optionally less than or equal to 750 milligrams of the first aerosolgenerating substrate, optionally less than or equal to 500 milligrams of the first aerosol-generating substrate, or optionally less than or equal to 250 milligrams of the first aerosol-generating substrate.
  • Example Ex126 An aerosol-generating article according to any of the preceding examples, wherein the total mass of the first aerosol-generating substrate divided by the volume of the internal cavity is greater than or equal to 0.1 milligrams per cubic millimetre, optionally greater than or equal to 0.12 milligrams per cubic millimetre, optionally greater than or equal to 0.15 milligrams per cubic millimetre, optionally greater than or equal to 0.18 milligrams per cubic millimetre, optionally 0.2 milligrams per cubic millimetre, optionally greater than or equal to 0.22 milligrams per cubic millimetre, optionally greater than or equal to 0.25 milligrams per cubic millimetre, optionally greater than or equal to 0.28 milligrams per cubic millimetre, optionally greater than or equal to 0.3 milligrams per cubic millimetre, optionally greater than or equal to 0.32 milligrams per cubic millimetre, optionally greater than or equal to 0.35 milligrams per cubic millimetre, optionally greater than or equal to 0.38 milligram
  • Example Ex127 An aerosol-generating article according to any of the preceding examples, wherein the total mass of the first aerosol-generating substrate divided by the volume of the internal cavity is less than or equal to 2 milligrams per cubic millimetre, optionally less than or equal to 1 .9 milligrams per cubic millimetre, optionally less than or equal to 1 .8 milligrams per cubic millimetre, optionally less than or equal to 1 .7 milligrams per cubic millimetre, optionally less than or equal to 1 .6 milligrams per cubic millimetre, optionally less than or equal to 1 .5 milligrams per cubic millimetre, optionally less than or equal to 1 .4 milligrams per cubic millimetre, optionally less than or equal to 1.3 milligrams per cubic millimetre, optionally less than or equal to 1.2 milligrams per cubic millimetre, optionally less than or equal to 1.1 milligrams per cubic millimetre, or optionally less than or equal to 1 milligram per cubic mill
  • Example Ex128 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity fills greater than or equal to 50 percent of the volume of the internal cavity, optionally greater than or equal to 60 percent of the volume of the internal cavity, or optionally greater than or equal to 70 percent of the volume of the internal cavity.
  • Example Ex129 An aerosol-generating article according to any of the preceding examples, wherein the first aerosol-generating substrate within the internal cavity fills less than or equal to 90 percent of the volume of the internal cavity.
  • Example Ex130 An aerosol-generating article according to any of the preceding examples, wherein the capsule further comprises at least one air inlet and at least one air outlet in the capsule outer wall, the at least one air inlet and at least one air outlet defining one or more airflow pathways through the internal cavity.
  • Example Ex131 An aerosol-generating article according to example Ex130, wherein the at least one air outlet is provided downstream of the at least one air inlet.
  • Example Ex132 An aerosol-generating article according to example Ex130 or Ex131 , wherein the at least one air inlet in the capsule outer wall is provided at an upstream end of the capsule.
  • Example Ex133 An aerosol-generating article according to example Ex130 or Ex131 , wherein the at least one air inlet in the capsule outer wall is provided at least 2 millimetres downstream from the upstream end of the capsule, optionally at least 3 millimetres downstream of the upstream end of the capsule, optionally at least 4 millimetres downstream of the upstream end of the capsule, or optionally at least 5 millimetres downstream of the upstream end of the capsule.
  • Example Ex134 An aerosol-generating article according to any one of examples Ex130 to Ex133, wherein the at least one air outlet in the capsule outer wall is provided at a downstream end of the capsule.
  • Example Ex135 An aerosol-generating article according to any one of examples Ex130 to Ex134, wherein the at least one air inlet in the capsule outer wall is provided at least 5 millimetres downstream from the at least one air inlet, optionally at least 8 millimetres downstream from the at least one air inlet, or optionally at least 10 millimetres downstream from the at least one air inlet.
  • Example Ex136 An aerosol-generating article according to any one of examples Ex130 to Ex135, wherein the capsule comprises a plurality of air outlets, optionally wherein the capsule comprises between 2 and 6 air outlets, optionally wherein the capsule comprises between 4 and 5 air outlets.
  • Example Ex137 An aerosol-generating article according to any one of examples Ex130 to Ex136, wherein the capsule comprises the same number of air inlets as the number of air outlets.
  • Example Ex138 An aerosol-generating article according to any one of examples Ex130 to Ex136, wherein the capsule comprises a larger number of air outlets than the number of air inlets.
  • Example Ex139 An aerosol-generating article according to any one of examples Ex130 to Ex138, wherein the at least one air inlet is provided on a cylindrical wall of the capsule.
  • Example Ex140 An aerosol-generating article according to any one of examples Ex130 to Ex139, wherein each of the at least one air inlet and at least one air outlet are in the form of a hole through the capsule outer wall, preferably wherein each hole is circular.
  • Example Ex141 An aerosol-generating article according to any one of examples Ex130 to Ex140, wherein each hole forming the at least one air inlet and the at least one air outlet has a diameter of greater than or equal to 0.2 millimetres, optionally greater than or equal to 0.25 millimetres, optionally greater than or equal to 0.3 millimetres, optionally greater than or equal to 0.35 millimetres, optionally greater than or equal to 0.4 millimetres, or optionally greater than or equal to 0.5 millimetres.
  • Example Ex142 An aerosol-generating article according to any one of examples Ex130 to Ex141 , wherein each hole forming the at least one air inlet and the at least one air outlet has a diameter of less than or equal to 2 millimetres, optionally less than or equal to 1 .8 millimetres, optionally less than or equal to 1.6 millimetres, optionally less than or equal to 1.4 millimetres, optionally less than or equal to 1.2 millimetres, optionally less than or equal to 1 millimetre, optionally less than or equal to 0.9 millimetres, or optionally less than or equal to 0.8 millimetres.
  • Example Ex143 An aerosol-generating article according to any one of examples Ex130 to Ex142, wherein each hole forming the at least one air inlet or the at least one air outlet are spaced at least 1 millimetre apart from each other.
  • Example Ex144 An aerosol-generating article according to any of the preceding examples, wherein the aerosol-generating article comprises a hollow tubular element, preferably wherein the hollow tubular element extends to the downstream end of the aerosol-generating article.
  • Example Ex145 An aerosol-generating article according to example Ex144, wherein the capsule is mounted within the hollow tubular element, optionally wherein the capsule is mounted at an upstream end of the hollow tubular element.
  • Example Ex146 An aerosol-generating article according to example Ex144 or Ex145, wherein the tubular element defines an empty cavity downstream of the capsule.
  • Example Ex147 An aerosol-generating article according to example Ex146, wherein the empty cavity has a length of greater than or equal to 10 millimetres, optionally wherein the empty cavity has a length of greater than or equal to 12 millimetres, or optionally wherein the empty cavity has a length of greater than or equal to 14 millimetres.
  • Example Ex148 An aerosol-generating article according to example Ex146 or Ex147, wherein the empty cavity has a length of less than or equal to 40 millimetres, optionally wherein the empty cavity has a length of less than or equal to 30 millimetres, or optionally wherein the empty cavity has a length of less than or equal to 40 millimetres.
  • Example Ex149 An aerosol-generating article according to any one of examples Ex144 to Ex148 and any one of examples Ex130 to Ex143, wherein the capsule protrudes from the upstream end of the hollow tubular element, such that the at least one air inlet is outside of the hollow tubular element.
  • Example Ex150 An aerosol-generating article according to any one of examples Ex144 to Ex149, wherein greater than or equal to 20 percent of the length of the capsule protrudes from the hollow tubular element, or optionally greater than or equal to 30 percent of the length of the capsule protrudes from the hollow tubular element.
  • Example Ex151 An aerosol-generating article according to any one of examples Ex144 to Ex150, wherein less than or equal to 50 percent of the length of the capsule protrudes from the hollow tubular element.
  • Example Ex152 An aerosol-generating article according to any one of examples Ex144 to Ex151 , wherein the hollow tubular element has a length of greater than or equal to 25 millimetres, optionally greater than or equal to 28 millimetres, optionally greater than or equal to 30 millimetres, optionally greater than or equal to 32 millimetres, or optionally greater than or equal to 34 millimetres.
  • Example Ex153 An aerosol-generating article according to any one of examples Ex144 to Ex152, wherein the hollow tubular element has a length of less than or equal to 50 millimetres, optionally less than or equal to 48 millimetres, optionally less than or equal to 45 millimetres, optionally less than or equal to 42 millimetres, or optionally less than or equal to 40 millimetres.
  • Example Ex154 An aerosol-generating article according to any one of examples Ex144 to Ex153, wherein the hollow tubular element has an outer diameter of between 5 millimetres and 12 millimetres, optionally between 5 millimetres and 10 millimetres, or optionally between 6 millimetres and 8 millimetres.
  • Example Ex155 An aerosol-generating article according to any one of examples Ex144 to Ex154, wherein the hollow tubular element has an internal diameter of greater than or equal to 5 millimetres, optionally greater than or equal to 5.5 millimetres, optionally greater than or equal to 6 millimetres, or optionally greater than or equal to 6.5 millimetres.
  • Example Ex156 An aerosol-generating article according to any one of examples Ex144 to Ex155, wherein the hollow tubular element has an internal diameter of less than or equal to 9 millimetres, optionally less than or equal to 8.5 millimetres, optionally less than or equal to 8 millimetres, or optionally less than or equal to 7.5 millimetres.
  • Example Ex157 An aerosol-generating article according to any one of examples Ex144 to Ex156, wherein the hollow tubular element has a wall thickness of greater than or equal to 100 micrometres, optionally greater than or equal to 150 micrometres, optionally greater than or equal to 200 micrometres, optionally greater than or equal to 250 micrometres, or optionally greater than or equal to 500 micrometres.
  • Example Ex158 An aerosol-generating article according to any one of examples Ex144 to Ex157, wherein the hollow tubular element has a wall thickness of less than or equal to 2 millimetres, optionally less than or equal to 1.5 millimetres, optionally less than or equal to 1.25 millimetres, or optionally less than or equal to 1 millimetres.
  • Example Ex159 An aerosol-generating article according to any one of examples Ex144 to Ex158, wherein the outer diameter of the capsule is less than the internal diameter of the hollow tubular element, optionally wherein the outer diameter of the capsule is at least 0.2 millimetres less than the internal diameter of the hollow tubular element, optionally wherein the outer diameter of the capsule is at least 0.5 millimetres less than the internal diameter of the hollow tubular element, or optionally wherein the outer diameter of the capsule is at least 0.8 millimetres less than the internal diameter of the hollow tubular element.
  • Example Ex160 An aerosol-generating article according to example Ex159, wherein the outer diameter of the capsule is no more than 0.2 millimetres less than the internal diameter of the hollow tubular element.
  • Example Ex161 An aerosol-generating article according to any one of examples Ex144 to Ex160, wherein the capsule is mounted within the hollow tubular element by a friction fit.
  • Example Ex162 An aerosol-generating article according to any one of examples Ex144 to Ex161 , wherein the hollow tubular is formed from a material selected from paper, cardboard, or a polymer.
  • Example Ex163 An aerosol-generating article according to any one of examples Ex144 to Ex162, wherein the inner wall of the hollow tubular element comprises a plurality of longitudinal corrugations.
  • Example Ex164 An aerosol-generating article according to any one of examples Ex144 to Ex163, wherein the resistance to draw (RTD) of the hollow tubular element is less than or equal to 10 millimetres H 2 O, optionally less than or equal to about 5 millimetres H 2 O, optionally less than or equal to about 2.5 millimetres H 2 O, optionally less than or equal to 2 millimetres H 2 O, or optionally less than or equal to 1 millimetre H 2 O.
  • RTD resistance to draw
  • Example Ex165 An aerosol-generating article according to any one of examples Ex144 to Ex164, wherein the resistance to draw (RTD) of the hollow tubular element is greater than or equal to 0 millimetres H 2 O, optionally greater than or equal to 0.25 millimetres H 2 O, optionally greater than or equal to 0.5 millimetres H 2 O, or optionally greater than or equal to 1 millimetre H 2 O.
  • RTD resistance to draw
  • Example Ex166 An aerosol-generating article according to any one of examples Ex144 to Ex165, further comprising a downstream filter segment mounted within the hollow tubular element at a downstream end of the hollow tubular element.
  • Example Ex167 An aerosol-generating article according to example Ex166, wherein the downstream filter segment extends to the downstream end of the hollow tubular element, optionally wherein the downstream end of the downstream filter segment defines the downstream end of the aerosol-generating article.
  • Example Ex168 An aerosol-generating article according to example Ex166 or Ex167, wherein the downstream filter segment is located greater than or equal to 5 millimetres downstream from the downstream end of the capsule, optionally greater than or equal to 8 millimetres downstream from the downstream end of the capsule, optionally greater than or equal to 10 millimetres downstream from the downstream end of the capsule, or optionally greater than or equal to 15 millimetres downstream from the downstream end of the capsule.
  • Example Ex169 An aerosol-generating article according to any one of examples Ex165 to Ex168, wherein the downstream filter segment is located less than or equal to 30 millimetres downstream from the downstream end of the capsule, or optionally less than or equal to 25 millimetres downstream from the downstream end of the capsule.
  • Example Ex170 An aerosol-generating article according to any one of examples Ex165 to Ex169, wherein the downstream filter segment is formed of a fibrous filtration material, optionally wherein the downstream filter segment comprises a cellulose acetate filter segment formed of cellulose acetate tow.
  • Example Ex171 An aerosol-generating article according to any one of examples Ex165 to Ex170, wherein the downstream filter segment has an external diameter that is approximately equal to the internal diameter of the hollow tubular element.
  • Example Ex172 An aerosol-generating article according to any one of examples Ex165 to Ex171 , wherein the external diameter of the downstream filter segment is between 5 millimetres and 12 millimetres, optionally between 6 millimetres and 10 millimetres, or optionally between 7 millimetres and 8 millimetres.
  • Example Ex173 An aerosol-generating article according to any one of examples Ex165 to Ex172, wherein the resistance to draw (RTD) of the downstream filter segment is greater than or equal to 0 millimetres H 2 O, optionally greater than or equal to 3 millimetres H 2 O, or optionally greater than or equal to 6 millimetres H 2 O.
  • RTD resistance to draw
  • Example Ex174 An aerosol-generating article according to any one of examples Ex165 to Ex173, wherein the resistance to draw (RTD) of the downstream filter segment is less than or equal to 12 millimetres H 2 O, optionally less than or equal to 1 1 millimetres H 2 O, or optionally less than or equal to 10 millimetres H 2 O.
  • RTD resistance to draw
  • Example Ex175 An aerosol-generating article according to any one of examples Ex165 to Ex174, wherein the length of the downstream filter segment is greater than or equal to 5 millimetres, or optionally greater than or equal to 8 millimetres, or optionally greater than or equal to 10 millimetres.
  • Example Ex176 An aerosol-generating article according to any one of examples Ex165 to Ex175, wherein the length of the downstream filter segment is less than or equal to 20 millimetres, or optionally less than or equal to 15 millimetres, or optionally less than or equal to 12 millimetres.
  • Example Ex177 An aerosol-generating article according to any of the preceding examples, wherein the resistance to draw (RTD) of the aerosol-generating article is greater than or equal to 1 millimetre H 2 O, optionally greater than or equal to 2 millimetres H 2 O, optionally greater than or equal to 3 millimetres H 2 O, optionally greater than or equal to 4 millimetres H 2 O, optionally greater than or equal to 5 millimetres H 2 O, optionally greater than or equal to 6 millimetres H 2 O, optionally greater than or equal to 7 millimetres H 2 O, optionally greater than or equal to 8 millimetres H 2 O, optionally greater than or equal to 9 millimetres H 2 O, optionally greater than or equal to 10 millimetres H 2 O, optionally greater than or equal to 15 millimetres H 2 O, optionally greater than or equal to 20 millimetres H 2 O, optionally greater than or equal to 30 millimetres H 2 O, optionally greater than or equal to 40 millimetres H
  • Example Ex178 An aerosol-generating article according to any of the preceding examples, wherein the resistance to draw (RTD) of the aerosol-generating article is less than or equal to 170 millimetres H 2 O, optionally less than or equal to than 160 millimetres H 2 O, optionally less than or equal to 150 millimetres H 2 O, or optionally less than or equal to 140 millimetres H 2 O.
  • RTD resistance to draw
  • Example Ex179 An aerosol-generating article according to any of the preceding examples, wherein the length of the aerosol-generating article is greater than or equal to 40 millimetres, optionally greater than or equal to 50 millimetres, or optionally greater than or equal to 60 millimetres.
  • Example Ex180 An aerosol-generating article according to any of the preceding examples, wherein the length of the aerosol-generating article is less than or equal to 90 millimetres, optionally less than or equal to 85 millimetres, or optionally less than or equal to 80 millimetres.
  • Example Ex181 An aerosol-generating article according to any of the preceding examples, wherein the aerosol-generating article has an external diameter of greater than or equal to 5 millimetres, optionally greater than or equal to 6 millimetres, or optionally greater than or equal to 7 millimetres.
  • Example Ex182 An aerosol-generating article according to any of the preceding examples, wherein the aerosol-generating article has an external diameter of less than or equal to 12 millimetres, optionally less than or equal to about 10 millimetres, optionally less than or equal to about 8 millimetres, or optionally less than or equal to about 7 millimetres.
  • Example Ex183 An aerosol-generating article according to any of the preceding examples, wherein the aerosol-generating article has a constant external diameter along its length.
  • Example Ex184 An aerosol-generating system comprising: an aerosol-generating article according to any of the preceding examples; and an aerosol-generating device comprising a heating element configured to heat the aerosol-generating article.
  • Example Ex185 An aerosol-generating system according to example Ex184, wherein during use the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate of the capsule outer wall are heated before the first aerosol-generating substrate within the internal cavity of the capsule.
  • Example Ex186 An aerosol-generating system according to example Ex184, wherein during use the at least one of an aerosol former, a flavorant, and a second aerosol generating substrate of the capsule outer wall are heated after the first aerosol-generating substrate within the internal cavity of the capsule.
  • Example Ex187 An aerosol-generating system according to any one of examples Ex184 to Ex186, wherein the aerosol-generating device comprises a device cavity for receiving the aerosol-generating article.
  • Example Ex188 An aerosol-generating system according to any one of examples Ex184 to Ex187, wherein the heating element is a resistive heating element.
  • Example Ex189 An aerosol-generating system according to any one of examples Ex184 to Ex187, wherein the heating element is a susceptor.
  • Example Ex190 An aerosol-generating system according to example Ex189, wherein the device cavity comprises an inductor coil surrounding the susceptor.
  • Example Ex191 An aerosol-generating system according to any one of examples Ex184 to Ex190, wherein the heating element is one of a blade or a pin.
  • Example Ex192 An aerosol-generating system according to any one of examples Ex184 to Ex191 , wherein the heating element is provided in the device cavity such that the heating element is inserted into the capsule when the aerosol-generating article is received within the device cavity.
  • Example Ex193 An aerosol-generating system according to any one of examples Ex184 to Ex192, wherein the heating element penetrates the capsule when the aerosol-generating article is received within the device cavity.
  • Example Ex194 An aerosol-generating system according to example Ex193, wherein the heating element penetrates an upstream end of the capsule when the aerosol-generating article is received within the device cavity.
  • Example Ex195 An aerosol-generating system according to example Ex194, wherein the one or more lines or areas of weakness on the upstream end of the capsule are configured to be broken by the penetration of the heating element into the upstream end of the capsule when the aerosol-generating article is received within the device cavity.
  • Example Ex196 An aerosol-generating system according to example Ex195, wherein the capsule does not substantially move relative to one or both of the hollow tubular element and the aerosol-generating article when the aerosol-generating article is received within the device cavity.
  • Example Ex197 An aerosol-generating system according to any one of examples Ex184 to Ex190, wherein the heating element is provided about the periphery of the device cavity such that the heating element at least partially surrounds the capsule when the aerosol-generating article is received within the device cavity.
  • Example Ex198 An aerosol-generating system according to any one of examples Ex184 to Ex197, wherein the device cavity comprises a distal end and a proximal end, wherein the distal end of the device cavity is a closed end and the proximal end of the device cavity is an open end.
  • Example Ex199 An aerosol-generating system according to any one of examples Ex184 to Ex198, wherein the cross-sectional shape of the device cavity is substantially the same as the cross-sectional shape of the aerosol-generating article.
  • Example Ex200 An aerosol-generating system according to any one of examples Ex184 to Ex199, wherein the device cavity has a substantially circular cross-section.
  • Example Ex201 An aerosol-generating system according to any one of examples Ex184 to Ex200, wherein the length of the device cavity is greater than the length of the capsule.
  • Example Ex202 An aerosol-generating system according to any one of examples Ex184 to Ex201 , wherein the capsule is fully within the device cavity when the aerosol-generating article is received within the device cavity.
  • Example Ex203 An aerosol-generating system according to any one of examples Ex184 to Ex202, wherein the device cavity has a length of between 15 millimetres and 80 millimetres, optionally between 20 millimetres and 70 millimetres, optionally between 25 millimetres and 60 millimetres, optionally between 25 millimetres and 50 millimetres, optionally between 25 millimetres and 29 millimetres, optionally between 26 millimetres and 29 millimetres, or optionally between 27 millimetres or 28 millimetres.
  • Example Ex204 An aerosol-generating system according to any one of examples Ex184 to Ex203, wherein the device cavity has a diameter of between 4 millimetres and 10 millimetres, optionally between 5 millimetres and 9 millimetres, optionally between 6 millimetres and 8 millimetres, or optionally between 6 millimetres and 7 millimetres.
  • Example Ex205 An aerosol-generating system according to any one of examples Ex184 to Ex204, wherein the diameter of the device cavity is greater than or equal to the external diameter of the aerosol-generating article, optionally wherein the diameter of the device cavity is substantially the same as the external diameter of the aerosol-generating article.
  • Example Ex206 An aerosol-generating system according to any one of examples Ex184 to Ex205, wherein the aerosol-generating device further comprises a power supply.
  • Example Ex207 An aerosol-generating system according to any one of examples Ex184 to Ex206, wherein the aerosol-generating device further comprises a piercing device for piercing the capsule when the aerosol-generating article is inserted into the device cavity.
  • Example Ex207 An aerosol-generating system according to any one of examples Ex184 to Ex206, wherein the aerosol-generating device further comprises a controller.
  • Example Ex208 An aerosol-generating system according to example Ex207, wherein the aerosol-generating device is configured to be controlled by the controller to operate between about 150 degrees Celsius and about 300 degrees Celsius.
  • Example Ex209 A method of manufacturing a capsule for an aerosol-generating article, the method comprising: providing a capsule outer wall defining an internal cavity; applying an inner coating on at least a part of the inner surface of the capsule outer wall; and piercing the capsule outer wall after the application of the inner coating to form at least one of an air inlet and an air outlet.
  • Example Ex210 A method of manufacturing a capsule according to example Ex209, the method further comprising providing a first aerosol-generating substrate within the internal cavity of the capsule.
  • Example Ex211 A method of manufacturing a capsule according to example Ex210, the method further comprising providing the capsule as a two-part capsule in the form of two separate parts.
  • Example Ex212 A method of manufacturing a capsule according to example Ex21 1 , the method further comprising joining the two separate parts together by one or both of a friction fit and an adhesive, wherein the two separate parts are joined together after applying the inner coating on at least a part of the inner surface of the capsule outer wall and after providing the first aerosol-generating substrate within the internal cavity of the capsule.
  • Example Ex213 A method of manufacturing a capsule according to any one of examples Ex210 to Ex212, wherein the inner coating applied on at least a part of the inner surface of the capsule outer wall comprises at least one of an aerosol former, a flavorant, and a second aerosol generating substrate.
  • Example Ex214 A method of manufacturing an aerosol-generating article according to any one of examples Ex1 to Ex183, the method comprising: the method of manufacturing a capsule according to any one of examples Ex209 to Ex213.
  • Example Ex215 A method of manufacturing an aerosol-generating article, the method comprising: providing a capsule manufactured according to the method of any one of Examples Ex209 to Ex213; providing a hollow tubular element; and at least partially inserting the capsule into the hollow tubular element to form an aerosolgenerating article.
  • Example Ex216 A method according to Example Ex 215, wherein the aerosol-generating article comprises any of the features of Examples Ex1 to Ex 183.
  • Figure 1 shows a schematic side sectional view of an aerosol-generating article in accordance with the present invention
  • Figure 2 shows a schematic side sectional view of a capsule suitable for use in the aerosolgenerating article of Figure 1 ;
  • Figure 3 shows a schematic side sectional view of an alternative capsule suitable for use in the aerosol-generating article of Figure 1 ;
  • Figure 4a shows a schematic side sectional view of a first embodiment of an aerosolgenerating system in accordance with the present invention
  • Figure 4b shows a schematic side sectional view of a second embodiment of an aerosolgenerating system in accordance with the present invention.
  • Figure 5a shows a graph of aerosol generated against time for the aerosol-generating system of Figure 4a.
  • Figure 5b shows a graph of aerosol generated against time for the aerosol-generating system of Figure 4b.
  • Figure 1 shows an aerosol-generating article 10 comprising a hollow tubular element 12 and a capsule 14 mounted at the upstream end of the hollow tubular element 12.
  • the aerosolgenerating article 10 extends from an upstream or distal end 16 - which substantially coincides with an upstream end of the capsule 14 - to a downstream or mouth end 18, which coincides with a downstream end of the hollow tubular element 12.
  • the aerosol-generating article 10 has an overall length of about 45 millimetres and an external diameter of about 7.2 mm.
  • the hollow tubular element 12 is formed of a cylindrical cardboard tube having a wall thickness of approximately 0.25 millimetres.
  • the hollow tubular element 12 defines an internal channel.
  • the hollow tubular element 12 has a length of about 45 millimetres, an external diameter of about 7.2 millimetres and an internal diameter of about 6.7 millimetres.
  • the capsule 14 is mounted within the internal channel of the hollow tubular element 12 at the upstream end.
  • Figure 2 shows a more detailed view of a suitable capsule 14 for use in the aerosolgenerating article 10 of Figure 1 .
  • the capsule 14 is a two-part capsule formed of an air impermeable polymer such as HPMC.
  • the capsule 14 has an elongate, capsule (sphero-cylindrical) shape with a round cross section.
  • the capsule comprises a capsule outer wall 20 and an inner coating 21 covering the entire inner surface of the capsule outer wall 20.
  • the outer wall 20 and the inner coating 21 define an internal cavity 22 which contains a plurality of beads 24 of a first aerosol-generating substrate which is a solid first aerosol-generating substrate comprising nicotine.
  • the inner coating comprises a second aerosol-generating substrate comprising nicotine, an aerosol former and flavorants.
  • the capsule outer wall 20 is defined by a cylindrical wall 26 and opposed hemispherical end walls 28, which are integrally formed with the cylindrical wall 26.
  • the capsule 14 has a length of about 20 millimetres and an external diameter of about 6.7 millimetres.
  • the external diameter of the capsule 14 is therefore similar to the internal diameter of the hollow tubular element 12 such that the capsule is retained within the hollow tubular element 12 by means of a friction fit.
  • the downstream filter segment 50 is spaced apart from the capsule 14 to define an empty cavity 52 inside the hollow tubular element 12.
  • the empty cavity 52 has a length of about 25 millimetres.
  • the downstream filter segment 50 extends to the downstream end of the hollow tubular element 12 such that the downstream end of the downstream filter segment 50 substantially coincides with the downstream end of the aerosol-generating article 10.
  • the downstream filter segment 50 has a length of about 10 millimetres and comprises a low-density, cellulose acetate filter segment.
  • the RTD of the downstream filter segment 50 is about 10 mm H 2 O.
  • the capsule 14 is mounted within the hollow tubular element 12 such that approximately 30 percent of the capsule 14 extends beyond the upstream end of the hollow tubular element 12. The capsule 14 therefore protrudes from the upstream end of the hollow tubular element 12 and the upstream end of the capsule 14 defines the upstream end 16 of the aerosol-generating article 10.
  • the capsule has an internal volume of about 600 cubic millimetres and contains about 200 milligrams of the solid first aerosol-generating substrate.
  • the capsule therefore contains approximately 0.33 milligrams of the first aerosol-generating substrate per cubic millimetre of the internal cavity 22.
  • the capsule 14 comprises a plurality of air outlets 30 each of which is in the form of a hole extending through the capsule outer wall 20 and having a diameter of about 0.5 millimetres.
  • the plurality of air inlets 30 are spaced apart in a circular formation on the upstream end wall 28 of the capsule 14.
  • the capsule 14 further comprises a plurality of air outlets 32 each of which is in the form of a hole extending through the capsule outer wall 20 and having a diameter of about 0.5 millimetres.
  • the plurality of air outlets 32 are spaced apart in a circular formation on the downstream end wall 29 of the capsule 14.
  • the protrusion of the capsule 14 from the upstream end of the hollow tubular element 12 means that the air inlets 30 are located outside of the hollow tubular element 12.
  • the air inlets 30 and air outlets 32 are arranged to be substantially symmetric to each other, at opposite ends of the capsule 14.
  • the arrangement of air inlets 30 and air outlets 32 define a plurality of airflow pathways through the internal cavity 22 of the capsule 14 such that during heating, ambient air can be drawn through the capsule 14 and in contact with the beads 24 of solid first aerosol-generating substrate. Aerosol generated from the beads 24 of solid first aerosol-generating substrate upon heating will be drawn out of the capsule 14 along with the ambient air, through the air outlets 32 and along the hollow tubular element 12 to the downstream end 18 of the aerosol-generating article 10.
  • the capsule 14 has one or more lines or areas of weakness on the upstream end of the capsule 14 (not shown) which will be discussed in more detail below.
  • Each of the beads 24 of solid first aerosol-generating substrate contained within the capsule 14 is spherical in shape with a diameter of 0.8 millimetres.
  • the beads are formed of a gel composition having the following composition:
  • FIG 3 shows a more detailed view of an alternative suitable capsule 114 for use in the aerosol-generating article 10 of Figure 1 .
  • the capsule 114 differs from the capsule 14 in that the capsule 114 does not comprise an inner coating covering the inner surface of the capsule outer wall 120. Instead, a second aerosol-generating substrate comprising nicotine, an aerosol former and a flavorant are dispersed within the capsule outer wall 120.
  • the capsule 1 14 differs from the capsule 14 in that the capsule 114 contains a plurality of flakes of an aerosolgenerating film 124 comprising a first aerosol-generating substrate having the following composition:
  • FIG. 4a shows an aerosol-generating system 2000 according to a first embodiment of the present invention.
  • the aerosol-generating system 2000 comprises an aerosol-generating article 10 as described above.
  • the aerosol-generating system 2000 further comprises an aerosolgenerating device 200.
  • the aerosol-generating device 200 comprises a device housing 245.
  • the device housing 245 defines a device cavity 242 for receiving the upstream end of the aerosolgenerating article 10.
  • the device cavity 242 has an inner diameter which substantially corresponds to the outer diameter of the aerosol-generating article 10.
  • the aerosol-generating device 200 further comprises a heater element 240 which is provided about the periphery of the device cavity 242 such that the heating element 240.
  • the heating element 240 is a resistive heating element although it will be appreciated that other types of heating element may be used.
  • the heating element 240 surrounds the capsule 14 when the aerosol-generating article 10 is received within the device cavity 242. As a result, during use, the second aerosol-generating substrate, the aerosol former and the flavorant of the inner coating 21 of the capsule 14 are heated before the beads 24 of solid first aerosol-generating substrate within the internal cavity 22 of the capsule 14.
  • FIG 4b shows an aerosol-generating system 3000 according to a second embodiment of the present invention.
  • the aerosol-generating system 3000 comprises an aerosol-generating article 10 as described above.
  • the aerosol-generating system 3000 further comprises an aerosolgenerating device 300.
  • the aerosol-generating device 300 comprises a device housing 345.
  • the device housing 245 defines a device cavity 342 for receiving the upstream end of the aerosolgenerating article 10.
  • the device cavity 342 has an inner diameter which substantially corresponds to the outer diameter of the aerosol-generating article 10.
  • the aerosol-generating device 300 further comprises a heater element 340 which is provided in the device cavity 342 such that the heating element 340 is inserted into the capsule 14 when the aerosol-generating article 10 is received within the device cavity 342.
  • the heating element 340 penetrates an upstream end of the capsule 14 when the aerosol-generating article 10 is received within the device cavity.
  • the heating element 340 is a heater blade in the form of a susceptor element.
  • the aerosolgenerating device 300 further comprises an inductor coil 341 which surrounds the susceptor heating element 340.
  • the one or more lines or areas of weakness (not shown) on the upstream end of the capsule 14 are configured to be broken by the penetration of the heating element 340 into the upstream end of the capsule 14 when the aerosol-generating article 10 is received within the device cavity 342. As a result, the capsule 14 does not substantially move relative to the hollow tubular element 12 or the aerosol-generating article 10 when the aerosol-generating article 10 is received within the device cavity.
  • the capsule 14 were substituted with the capsule 1 14 then, in a similar way to above, the second aerosol-generating substrate, the aerosol former and the flavorant dispersed in the outer wall of the capsule 1 14 would be heated after the flakes 124 of first aerosol-generating substrate within the internal cavity 122 of the capsule 1 14.
  • Figure 5a is an example of a graph illustrating aerosol generated against time for the aerosol-generating system 2000 according to the first embodiment of the present invention.
  • the second aerosol-generating substrate, the aerosol former and the flavorant of the inner coating 21 of the capsule 14 are heated before the beads 24 of solid first aerosol-generating substrate within the internal cavity 22 of the capsule 14.
  • the aerosol provided by the coating 21 is generated quicker than the aerosol generated by the beads 24 of solid first aerosol-generating substrate within the internal cavity 22. Therefore, the coating 21 of the capsule 14 decreases the delay between actuation of the heating element 240 and the subsequent generation of an aerosol.
  • the coating 21 of the capsule 14 increases the total amount of aerosol generated by the aerosol-generating system 2000 by providing additional aerosol to that generated by the beads 24. It will be appreciated that the graph of Figure 5a would look similar if the capsule 14 were substituted with the capsule 1 14.
  • Figure 5b is an example of a graph illustrating aerosol generated against time for the aerosol-generating system 3000 according to the second embodiment of the present invention.
  • the second aerosol-generating substrate, the aerosol former and the flavorant of the inner coating 21 of the capsule 14 are heated after the beads 24 of solid first aerosol-generating substrate within the internal cavity 22 of the capsule 14.
  • the aerosol provided by the coating 21 is generated with a larger delay following actuation of the heater element 340 than the aerosol generated by the beads 24 of solid first aerosol-generating substrate within the internal cavity 22. Therefore, the coating 21 of the capsule 14 increases the duration of aerosol generation by providing a boost in generated aerosol from heating of the coating 21 when the amount of generated aerosol from the beads 24 is decreasing or depleted.
  • the coating 21 of the capsule 14 increases the total amount of aerosol generated by the aerosol-generating system 3000 by providing additional aerosol to that generated by the beads 24. It will be appreciated that the graph of Figure 5b would look similar if the capsule 14 were substituted with the capsule 1 14.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention propose un article de génération d'aérosol (10) pour générer un aérosol inhalable lorsqu'il est chauffé. L'article de génération d'aérosol (10) comprend une capsule (14 ; 114). La capsule (14 ; 114) comprend une paroi externe de capsule (20) définissant une cavité interne (22). La capsule (14 ; 114) comprend également un premier substrat de génération d'aérosol (24 ; 124) à l'intérieur de la cavité interne (22) de la capsule (14 ; 114). La capsule (14 ; 114) comprend également au moins un élément parmi un agent de formation d'aérosol, un agent aromatisant, et un second substrat de génération d'aérosol disposé à l'intérieur de la paroi externe de capsule (20), sur une surface de la paroi externe de capsule (20), ou les deux à l'intérieur de la paroi externe de capsule (20) et sur une surface de la paroi externe de capsule (20). L'invention propose également un système de génération d'aérosol (2000 ; 3000) comprenant l'article de génération d'aérosol (10) et un dispositif de génération d'aérosol (200 ; 300) comprenant un élément chauffant (240, 340) configuré pour chauffer l'article de génération d'aérosol (10). L'invention propose également un procédé de fabrication d'une capsule (14).
PCT/EP2023/080148 2022-10-27 2023-10-27 Article de génération d'aérosol comprenant une capsule WO2024089276A1 (fr)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015176898A1 (fr) 2014-05-21 2015-11-26 Philip Morris Products S.A. Article produisant un aérosol avec suscepteur interne
CA3014136A1 (fr) * 2016-05-31 2017-12-07 Philip Morris Products S.A. Article generateur d'aerosol comprenant un diffuseur de chaleur
US20180352858A1 (en) * 2015-10-22 2018-12-13 Philip Morris Products S.A. Aerosol-generating system
US10206430B2 (en) * 2013-12-31 2019-02-19 Philip Morris Products S.A. Aerosol-generating device, and a capsule for use in an aerosol-generating device
US20190053535A1 (en) * 2015-10-22 2019-02-21 Philip Morris Products S.A. Aerosol-generating system and capsule for use in an aerosol-generating system
US10342259B2 (en) * 2017-03-21 2019-07-09 Altria Client Services Llc Flavor delivery system
WO2020115151A1 (fr) 2018-12-06 2020-06-11 Philip Morris Products S.A. Article de génération d'aérosol avec un contenu de générateur d'aérosol élevé
US20200359688A1 (en) * 2018-01-31 2020-11-19 Kt&G Corporation Aerosol generation system
KR102330288B1 (ko) * 2018-01-31 2021-11-24 주식회사 케이티앤지 복수의 세그먼트로 구성된 궐련
US20220125101A1 (en) * 2019-03-11 2022-04-28 Nicoventures Trading Limited An article for use in a non-combustible aerosol provision system
KR20220119099A (ko) * 2019-12-20 2022-08-26 니코벤처스 트레이딩 리미티드 에어로졸 제공 시스템에서 사용하기 위한 물품

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10206430B2 (en) * 2013-12-31 2019-02-19 Philip Morris Products S.A. Aerosol-generating device, and a capsule for use in an aerosol-generating device
WO2015176898A1 (fr) 2014-05-21 2015-11-26 Philip Morris Products S.A. Article produisant un aérosol avec suscepteur interne
US20180352858A1 (en) * 2015-10-22 2018-12-13 Philip Morris Products S.A. Aerosol-generating system
US20190053535A1 (en) * 2015-10-22 2019-02-21 Philip Morris Products S.A. Aerosol-generating system and capsule for use in an aerosol-generating system
CA3014136A1 (fr) * 2016-05-31 2017-12-07 Philip Morris Products S.A. Article generateur d'aerosol comprenant un diffuseur de chaleur
US10342259B2 (en) * 2017-03-21 2019-07-09 Altria Client Services Llc Flavor delivery system
US20200359688A1 (en) * 2018-01-31 2020-11-19 Kt&G Corporation Aerosol generation system
KR102330288B1 (ko) * 2018-01-31 2021-11-24 주식회사 케이티앤지 복수의 세그먼트로 구성된 궐련
WO2020115151A1 (fr) 2018-12-06 2020-06-11 Philip Morris Products S.A. Article de génération d'aérosol avec un contenu de générateur d'aérosol élevé
US20220125101A1 (en) * 2019-03-11 2022-04-28 Nicoventures Trading Limited An article for use in a non-combustible aerosol provision system
KR20220119099A (ko) * 2019-12-20 2022-08-26 니코벤처스 트레이딩 리미티드 에어로졸 제공 시스템에서 사용하기 위한 물품

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