EP4573933A1 - Article de génération d'aérosol ayant un élément de canalisation d'air - Google Patents

Article de génération d'aérosol ayant un élément de canalisation d'air Download PDF

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Publication number
EP4573933A1
EP4573933A1 EP23217664.4A EP23217664A EP4573933A1 EP 4573933 A1 EP4573933 A1 EP 4573933A1 EP 23217664 A EP23217664 A EP 23217664A EP 4573933 A1 EP4573933 A1 EP 4573933A1
Authority
EP
European Patent Office
Prior art keywords
aerosol
millimetres
percent
generating
generating article
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP23217664.4A
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German (de)
English (en)
Inventor
Matteo Bologna
Farhang MOHSENI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
Original Assignee
Philip Morris Products SA
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 SA filed Critical Philip Morris Products SA
Priority to EP23217664.4A priority Critical patent/EP4573933A1/fr
Publication of EP4573933A1 publication Critical patent/EP4573933A1/fr
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF 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
    • A24F40/46—Shape or structure of electric heating means
    • A24F40/465—Shape or structure of electric heating means specially adapted for induction heating

Definitions

  • the present disclosure relates to an air channelling element or cooling element for an aerosol-generating article, preferably to an aerosol-generating article comprising such an air channelling element or cooling element, where the aerosol-generating article is adapted to produce an inhalable aerosol upon heating.
  • the present disclosure also relates to an aerosol-generating system comprising such an aerosol-generating article.
  • Aerosol-generating articles in which an aerosol-generating substrate, such as a tobacco-containing material, is heated rather than combusted are known in the art.
  • An aim of such 'heated' aerosol-generating articles is to reduce certain smoke constituents of the type produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes.
  • an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate.
  • volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source to the aerosol-generating substrate and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol that is inhaled by the user.
  • a number of handheld aerosol-generating devices configured to heat aerosol-generating substrates of heated aerosol-generating articles are known in the art. These include electrically-operated aerosol-generating devices in which an aerosol is generated by the transfer of heat from one or more electrical heating elements of the aerosol-generating device to the aerosol-generating substrate of the heated aerosol-generating article.
  • Known handheld electrically operated aerosol-generating devices typically comprise a battery or other power source, control electronics and one or more electrical heating elements for heating the aerosol-generating substrate of a heated aerosol-generating article designed specifically for use with the aerosol-generating device.
  • Some known electrically-operated aerosol-generating devices comprise one or more external heating elements.
  • WO 2020/115151 A1 discloses an aerosol-generating system comprising an aerosol-generating article and an electrically-operated aerosol-generating device comprising an external heating element that circumscribes the outer periphery of the aerosol-generating article.
  • Aerosol-generating articles in which a tobacco-containing substrate is heated rather than combusted present a number of challenges that were not encountered with conventional smoking articles.
  • Tobacco-containing substrates are typically heated to significantly lower temperatures compared with the temperatures reached by the combustion front in a conventional cigarette. This may have an impact on nicotine release from the tobacco-containing substrate and nicotine delivery to the user.
  • the heating temperature is increased in an attempt to boost nicotine delivery, then the aerosol generated typically needs to be cooled to a greater extent and more rapidly before it reaches the user.
  • Aerosol delivery and user experience may be strongly influenced when an aerosol-generating article of the type described above is used under particularly hot and humid weather conditions, such as those frequently encountered in countries characterised by a tropical climate.
  • high humidity levels for example above 90%
  • This higher concentration of water together with the humid air being drawn through the article may lead to a hotter aerosol when the substrate is heated.
  • the temperature at the mouthpiece of the article may be relatively high, which may be associated with a feeling of discomfort for some users, as sensitive tissues such as lips may come into direct contact with a surface of the mouthpiece during use.
  • an element of an aerosol-generating article that also reduces the risk of material of the aerosol-generating substrate from unduly migrating upstream or downstream from the aerosol-generating substrate or even exiting the aerosol-generating article.
  • an inner channel defined within an inner body that is located within an outer tube of an air channelling element downstream of the aerosol-generating substrate may ensure that hot aerosol travelling downstream from the aerosol-generating substrate can be cooled.
  • the air or aerosol travelling downstream from the aerosol-generating substrate may be segregated by the inner body such that aerosol travelling outside of the inner channel may be cooled by way of heat exchange with the material of the inner body and with external environment via the wall of the air channelling element. It is such peripheral aerosol that will be travelling in proximity to the outer surface of the article, particularly at the mouth end of the article, that will influence the external temperature of the article at the mouth end. This mouth end portion of the article may be in contact with a sensitive body part of a user such as the lips.
  • the airflow segregation enabled by the air channelling element of the present invention may ensure that such peripheral aerosol may be cooled down sufficiently so as to reduce a user's sensation that the periphery of a mouth end portion of the article may be too hot.
  • the aerosol-generating article has a distal end.
  • the distal end is opposite the proximal end.
  • the distal end of the aerosol-generating article may also be referred to as the upstream end of the aerosol-generating article.
  • Components of the aerosol-generating article may be described as being upstream or downstream of one another based on their relative positions between the proximal end of the aerosol-generating article and the distal end of the aerosol-generating article.
  • the term "elongate” is used to describe a component or element having a length that is greater than the width and the thickness thereof.
  • the length of an elongate component or element may be at least twice the width thereof.
  • An elongate component or element may have a width that is substantially the same as the thickness thereof.
  • an elongate element may have a substantially square cross-section or a substantially circular cross-section.
  • An elongate component or element may have a width that is greater than the thickness thereof.
  • an elongate element may have a substantially rectangular cross-section or a substantially elliptical or oval circular cross-section.
  • strand describes an elongate element of aerosol-generating material having a length that is substantially greater than the width and the thickness thereof.
  • susceptor element is used to describe an element comprising a susceptor material that is capable of converting electromagnetic energy into heat. When located within an alternating or fluctuating electromagnetic field, at least one of hysteresis losses and eddy currents induced in the susceptor element cause heating of the susceptor element.
  • 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.
  • tobacco cut filler is used to describe an aerosol-generating substrate comprising a plurality of strands of tobacco lamina.
  • homogenised plant material is used to describe a material formed by agglomerating particulate plant material.
  • Homogenised plant material may be formed by agglomerating particles of plant material obtained by pulverising, grinding or comminuting plant material.
  • Homogenised plant material may be produced by casting, extrusion, paper making processes or other suitable processes known in the art.
  • homogenised tobacco material is used to describe a material formed by agglomerating particulate tobacco material.
  • gel is used to describe a substantially dilute cross-linked material, which exhibits no flow in the steady state.
  • the term “hollow tubular element” or “tube” is used to describe a generally cylindrical element having a lumen along a longitudinal axis thereof.
  • the hollow tubular element or tube may have a substantially circular, oval or elliptical cross-section.
  • the lumen may have a substantially circular, oval or elliptical cross-section.
  • the term “hollow tubular element” or “tube” is used to describe an element defining at least one airflow conduit establishing an uninterrupted fluid communication between an upstream end of the hollow tubular element and a downstream end of the hollow tubular element.
  • a hollow tubular element or tube provides an unrestricted flow channel.
  • the hollow tubular element or tube 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 H 2 O per 10 millimetres of length of the hollow tubular element or tube, less than 0.4 mm H 2 O per 10 millimetres of length of the hollow tubular element or tube, or less than 0.1 mm H 2 O per 10 millimetres of length of the hollow tubular element or tube.
  • the flow channel should therefore be free from any components that would obstruct the flow of air in a longitudinal direction.
  • the flow channel may be substantially empty.
  • ventilation level is used to denote a volume ratio between the airflow admitted into the aerosol-generating article via a ventilation zone (ventilation airflow) and an airflow exiting the aerosol-generating article via the mouth end, or downstream end.
  • ventilation airflow the greater the ventilation airflow, the higher the dilution of the aerosol flow delivered to a user.
  • Increasing the ventilation level may increase a level of cooling of the aerosol flow prior to delivery to a user.
  • the ventilation level is measured on the aerosol-generating article on its own - that is, without inserting the aerosol-generating article in a suitable aerosol-generating device adapted to heat the aerosol-generating substrate.
  • percentages by weight of components of the aerosol-generating substrate recited herein are based on the dry weight of the aerosol-generating substrate.
  • percentages by weight of components of the aerosol-generating material recited herein are based on the dry weight of the aerosol-generating material.
  • the resistance to draw (RTD) of the aerosol-generating article or a component of the aerosol-generating article is measured in accordance with ISO 6565-2015 at a volumetric flow rate of 17.5 millilitres per second at the proximal end of the aerosol-generating article or the component thereof at a temperature of 22 degrees Celsius, a pressure of 101 kPa (760 Torr) and a relative humidity of 60%.
  • the air channelling element may comprise one or more peripheral channels located between the outer tube and the inner body.
  • aerosol generated by the aerosol-generating substrate may flow through the one or more peripheral channels and the inner channel. This segregation of aerosol downstream of the aerosol-generating substrate may help to avoid a user experiencing an uncomfortably warm sensation on the lips of the user during use of the aerosol-generating article. Aerosol flowing through the one or more peripheral channels may be cooled by conduction due to the proximity of the one or more peripheral channels and the external environment.
  • the aerosol-generating article may comprise a ventilation zone providing fluid communication between the exterior of the aerosol-generating article and the one or more peripheral channels. This may help to further cool aerosol flowing through the one or more peripheral channels.
  • Each of the one or more peripheral channels may be defined by the outer tube and the inner body.
  • each of the one or more peripheral channels may be defined by an internal surface of the outer tube and an external surface of the inner body.
  • the one or more peripheral channels may substantially surround the inner channel.
  • At least one of the one or more peripheral channels may be substantially empty.
  • Each of the one or more peripheral channels may be substantially empty.
  • At least one of the one or more peripheral channels may be at least partially filled.
  • the air channelling element may comprise a porous body located in at least one of the one or more peripheral channels.
  • the air channelling element may comprise a polylactic acid (PLA) film located in at least one of the one or more peripheral channels. This may improve cooling of aerosol flowing through the at least one of the one or more peripheral channels.
  • PLA polylactic acid
  • the length of the inner body may be at least 20 percent, at least 25 percent, or at least 30 percent of the length of the air channelling element.
  • the length of the inner body may be less than or equal to 80 percent, less than or equal to 70 percent, or less than or equal to 60 percent of the length of the air channelling element.
  • the length of the inner body may be between 25 percent and 80 percent, between 25 percent and 70 percent, or between 25 percent and 60 percent of the length of the air channelling element.
  • the length of the inner body may be between 30 percent and 80 percent, between 30 percent and 70 percent, or between 30 percent and 60 percent of the length of the air channelling element.
  • Increasing the length of the inner body may mean that aerosol flows through a longer inner channel having a reduced cross-sectional area. This may increase cooling of aerosol generated by the aerosol-generating substrate.
  • increasing the length of the inner body may increase the length through which aerosol generated by the aerosol-generating substrate is separated into the one or more peripheral channels and the inner channel. This may increase cooling of aerosol generated by the aerosol-generating substrate. In particular, this may increase cooling of aerosol in the air channelling element close to the periphery of the air channelling element. This may be particularly desired where the aerosol-generating substrate is configured to be heated from the outside.
  • the inner body may have a length of at least 4 millimetres, at least 6 millimetres, or at least 8 millimetres.
  • the inner body may have a length of between 4 millimetres and 18 millimetres, between 4 millimetres and 16 millimetres, or between 4 millimetres and 14 millimetres.
  • the inner body may have a length of between 6 millimetres and 18 millimetres, between 6 millimetres and 16 millimetres, or between 6 millimetres and 14 millimetres.
  • the inner body may have a length of between 8 millimetres and 18 millimetres, between 8 millimetres and 16 millimetres, or between 8 millimetres and 14 millimetres.
  • the length of the inner body may define the length of the inner channel.
  • the inner channel may extend along substantially the entire length of the inner body.
  • the inner channel may extend from the upstream end of the inner body to the downstream end of the inner body.
  • the inner channel may have substantially the same length as the inner body.
  • the length of the inner channel may be at least 20 percent, at least 25 percent, or at least 30 percent of the length of the air channelling element.
  • the length of the inner channel may be less than or equal to 80 percent, less than or equal to 70 percent, or less than or equal to 60 percent of the length of the cooling element.
  • the length of the inner channel may be between 20 percent and 80 percent, between 20 percent and 70 percent, or between 20 percent and 60 percent of the length of the air channelling element.
  • the length of the inner channel may be between 25 percent and 80 percent, between 25 percent and 70 percent, or between 25 percent and 60 percent of the length of the air channelling element.
  • the length of the inner channel may be between 30 percent and 80 percent, between 30 percent and 70 percent, or between 30 percent and 60 percent of the length of the cooling element.
  • the length of the inner channel may be selected based on a desired degree of cooling of aerosol generated by the aerosol-generating substrate.
  • the length of the inner channel may be selected based on a desired degree of cooling of aerosol in the air channelling element close to the periphery of the air channelling element.
  • Increasing the length of the inner channel may mean that aerosol flows through a longer channel having a reduced cross-sectional area. This may increase cooling of aerosol generated by the aerosol-generating substrate.
  • increasing the length of the inner channel may increases the length through which aerosol generated by the aerosol-generating substrate is separated into the one or more peripheral channels and the inner channel. This may increase cooling of aerosol generated by the aerosol-generating substrate. In particular, this may increase cooling of aerosol in the air channelling element close to the periphery of the air channelling element. This may be particularly desired where the aerosol-generating substrate is configured to be heated from the outside.
  • the inner channel may have a length of at least 4 millimetres, at least 6 millimetres, or at least 8 millimetres.
  • the inner channel may have a length of less than or equal to 18 millimetres, less than or equal to 16 millimetres, or less than or equal to 14 millimetres.
  • the inner channel may have a length of between 4 millimetres and 18 millimetres, between 4 millimetres and 16 millimetres, or between 4 millimetres and 14 millimetres.
  • the inner channel may have a length of between 6 millimetres and 18 millimetres, between 6 millimetres and 16 millimetres, or between 6 millimetres and 14 millimetres.
  • the inner channel may have a length of between 8 millimetres and 18 millimetres, between 8 millimetres and 16 millimetres, or between 8 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element. In other words, the upstream end of the inner body may not be aligned with the upstream end of the air channelling element, and there is a longitudinal displacement between the upstream end of the inner body and the upstream end of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by at least 20 percent, at least 30 percent, or at least 40 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by less than or equal to 80 percent, less than or equal to 75 percent, or less than or equal to 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 20 percent and 80 percent, between 20 percent and 75 percent, or between 20 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 30 percent and 80 percent, between 30 percent and 75 percent, or between 30 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 40 percent and 80 percent, between 40 percent and 75 percent, or between 40 percent and 70 percent of the length of the air channelling element.
  • the longitudinal displacement between the upstream end of the inner body and the upstream end of the air channelling element may be selected based on a desired temperature profile of aerosol across the air channelling element and exiting the air channelling element.
  • the aerosol-generating substrate is configured to be heated from the outside
  • Increasing the longitudinal displacement between the upstream end of the inner body and the upstream end of the air channelling element may result in increased mixing of aerosol in the air channelling element upstream of the inner body and a more homogeneous temperature profile of aerosol across the air channelling element. This may help to avoid a user experiencing an uncomfortably warm sensation on the lips of the user during use of the aerosol-generating article.
  • aerosol-generating substrate is configured to be heated from the inside
  • aerosol in the air channelling element towards the periphery of the air channelling element may be cooler than aerosol in the air channelling element towards the central or longitudinal axis of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by at least 4 millimetres, at least 6 millimetres, or at least 8 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by less than or equal to 18 millimetres, less than or equal to 16 millimetres, or less than or equal to 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 4 millimetres and 18 millimetres, between 4 millimetres and 16 millimetres, or between 4 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 6 millimetres and 18 millimetres, between 6 millimetres and 16 millimetres, or between 6 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the air channelling element by between 8 millimetres and 18 millimetres, between 8 millimetres and 16 millimetres, or between 8 millimetres and 14 millimetres.
  • the inner body may be shorter than the outer tube.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by at least 20 percent, at least 30 percent, or at least 40 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by less than or equal to 80 percent, less than or equal to 75 percent, or less than or equal to 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 20 percent and 80 percent, between 20 percent and 75 percent, or between 20 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 30 percent and 80 percent, between 30 percent and 75 percent, or between 30 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 40 percent and 80 percent, between 40 percent and 75 percent, or between 40 percent and 70 percent of the length of the air channelling element.
  • the longitudinal displacement between the upstream end of the inner body and the upstream end of the outer tube may be selected based on a desired temperature profile of aerosol across the air channelling element and exiting the air channelling element.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by at least 4 millimetres, at least 6 millimetres, or at least 8 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by less than or equal to 18 millimetres, less than or equal to 16 millimetres, or less than or equal to 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 4 millimetres and 18 millimetres, between 4 millimetres and 16 millimetres, or between 4 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 6 millimetres and 18 millimetres, between 6 millimetres and 16 millimetres, or between 6 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the upstream end of the outer tube by between 8 millimetres and 18 millimetres, between 8 millimetres and 16 millimetres, or between 8 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by at least 20 percent, at least 30 percent, or at least 40 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by less than or equal to 80 percent, less than or equal to 75 percent, or less than or equal to 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 20 percent and 80 percent, between 20 percent and 75 percent, or between 20 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 30 percent and 80 percent, between 30 percent and 75 percent, or between 30 percent and 70 percent of the length of the air channelling element.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 40 percent and 80 percent, between 40 percent and 75 percent, or between 40 percent and 70 percent of the length of the air channelling element.
  • the longitudinal displacement between the upstream end of the inner body and the downstream end of the aerosol-generating substrate may be selected based on a desired temperature profile of aerosol across the air channelling element and exiting the air channelling element.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by at least 4 millimetres, at least 6 millimetres, or at least 8 millimetres.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by less than or equal to 18 millimetres, less than or equal to 16 millimetres, or less than or equal to 14 millimetres.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 4 millimetres and 18 millimetres, between 4 millimetres and 16 millimetres, or between 4 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 6 millimetres and 18 millimetres, between 6 millimetres and 16 millimetres, or between 6 millimetres and 14 millimetres.
  • the upstream end of the inner body may be located away from the downstream end of the aerosol-generating substrate by between 8 millimetres and 18 millimetres, between 8 millimetres and 16 millimetres, or between 8 millimetres and 14 millimetres.
  • the air channelling element may comprise a cavity defined by an internal surface of the outer tube.
  • the cavity is empty.
  • the air channelling element may comprise a cavity extending from the upstream end of the air channelling element towards the downstream end of the air channelling element.
  • the air channelling element may comprise a cavity extending from the upstream end of the air channelling element towards the upstream end of the inner body.
  • the air channelling element may comprise a cavity extending from the upstream end of the inner body towards the upstream end of the air channelling element.
  • the air channelling element may comprise a cavity extending from the upstream end of the air channelling element to the upstream end of the inner body.
  • the aerosol-generating article may comprise a cavity located between the aerosol-generating substrate and the inner body of the air channelling element.
  • the cavity may be delimited by the downstream end of the aerosol-generating substrate and the upstream end of the inner body.
  • the air channelling element may have a length of at least 8 millimetres, at least 12 millimetres, or at least 15 millimetres.
  • the air channelling element may have a length of less than or equal to 28 millimetres, less than or equal to 25 millimetres, or less than or equal to 22 millimetres.
  • the air channelling element may have a length of between 8 millimetres and 28 millimetres, between 8 millimetres and 25 millimetres, or between 8 millimetres and 22 millimetres.
  • the air channelling element may have a length of between 12 millimetres and 28 millimetres, between 12 millimetres and 25 millimetres, or between 12 millimetres and 22 millimetres.
  • the air channelling element may have a length of between 15 millimetres and 28 millimetres, between 15 millimetres and 25 millimetres, or between 15 millimetres and 22 millimetres.
  • the length of the outer tube may define the length of the air channelling element.
  • the length of the outer tube may be substantially the same as the length of the air channelling element.
  • the outer tube may extend along substantially the entire length of the air channelling element. In other words, the outer tube may extend from the upstream end of the air channelling element to the downstream end of the air channelling element.
  • the outer tube may have a length of at least 8 millimetres, at least 12 millimetres, or at least 15 millimetres.
  • the outer tube may have a length of less than or equal to 28 millimetres, less than or equal to 25 millimetres, or less than or equal to 22 millimetres.
  • the outer tube may have a length of between 8 millimetres and 28 millimetres, between 8 millimetres and 25 millimetres, or between 8 millimetres and 22 millimetres.
  • the outer tube may have a length of between 12 millimetres and 28 millimetres, between 12 millimetres and 25 millimetres, or between 12 millimetres and 22 millimetres.
  • the outer tube may have a length of between 15 millimetres and 28 millimetres, between 15 millimetres and 25 millimetres, or between 15 millimetres and 22 millimetres.
  • the air channelling element may comprise a single inner channel.
  • the inner channel may have a cross-sectional area of at least 15 percent, at least 20 percent, or at least 25 percent of a cross-sectional area of the air channelling element in a same transverse plane.
  • the inner channel may have a cross-sectional area of less than or equal to 40 percent, less than or equal to 35 percent, or less than or equal to 30 percent of a cross-sectional area of the air channelling element in a same transverse plane.
  • Reducing the cross-sectional area of the inner channel may increase cooling of aerosol generated by the aerosol-generating substrate.
  • reducing the cross-sectional area of the inner channel may increase cooling of aerosol generated by the aerosol-generating substrate that passes through the inner channel.
  • Reducing the cross-sectional area of the inner channel may increase the volume of aerosol generated by the aerosol-generating substrate that passes through the one or more peripheral channels, where present. This may further increase cooling of aerosol generated by the aerosol-generating substrate.
  • the inner channel may have a cross-sectional area of between 15 percent and 40 percent, between 15 percent and 35 percent, or between 15 percent and 30 percent of a cross-sectional area of the air channelling element in a same transverse plane.
  • the inner channel may have a cross-sectional area of between 20 percent and 40 percent, between 20 percent and 35 percent, or between 20 percent and 30 percent of a cross-sectional area of the air channelling element in a same transverse plane.
  • the inner channel may have a cross-sectional area of between 25 percent and 40 percent, between 25 percent and 35 percent, or between 25 percent and 30 percent of a cross-sectional area of the air channelling element in a same transverse plane.
  • the cross-sectional area of the inner channel described herein may refer to the cross-sectional area of the inner channel at the downstream end of the inner channel.
  • the cross-sectional area of the inner channel described herein may refer to the cross-sectional area of the inner channel at the downstream end of the inner body.
  • the inner channel may have a cross-sectional area of at least 6 square millimetres, at least 8 square millimetres, or at least 10 square millimetres.
  • the inner channel may have a cross-sectional area of less than or equal to 16 square millimetres, less than or equal to 14 square millimetres, or less than or equal to 12 square millimetres.
  • the inner channel may have a cross-sectional area of between 6 square millimetres and 16 square millimetres, between 6 square millimetres and 14 square millimetres, or between 6 square millimetres and 12 square millimetres.
  • the inner channel may have a cross-sectional area of between 8 square millimetres and 16 square millimetres, between 8 square millimetres and 14 square millimetres, or between 8 square millimetres and 12 square millimetres.
  • the inner channel may have a cross-sectional area of between 10 square millimetres and 16 square millimetres, between 10 square millimetres and 14 square millimetres, or between 10 square millimetres and 12 square millimetres.
  • the width of the inner channel may be at least 30 percent, at least 40 percent, or at least 50 percent of the width of the air channelling element.
  • the width of the inner channel may be substantially the same as the width of the air channelling element.
  • the inner channel may extend substantially across the diameter of the air channelling element.
  • the width of the inner channel may be up to 90 percent, up to 80 percent, or up to 70 percent of the width of the air channelling element.
  • the width of the inner channel may be between 30 percent and 90 percent, between 30 percent and 80 percent, or between 30 percent and 70 percent of the width of the air channelling element.
  • the width of the inner channel may be between 40 percent and 90 percent, between 40 percent and 80 percent, or between 40 percent and 70 percent of the width of the air channelling element.
  • the width of the inner channel may be between 50 percent and 90 percent, between 50 percent and 80 percent, or between 50 percent and 70 percent of the width of the air channelling element.
  • the inner channel may have a width of at least 2 millimetres, at least 3 millimetres, or at least 4 millimetres.
  • the inner channel may have a width of less than or equal to 7 millimetres, less than or equal to 6 millimetres, or less than or equal to 5 millimetres.
  • the inner channel may have a width of between 2 millimetres and 7 millimetres, between 2 millimetres and 6 millimetres, or between 2 millimetres and 5 millimetres.
  • the inner channel may have a width of between 3 millimetres and 7 millimetres, between 3 millimetres and 6 millimetres, or between 3 millimetres and 5 millimetres.
  • the inner channel may have a width of between 4 millimetres and 7 millimetres, between 4 millimetres and 6 millimetres, or between 4 millimetres and 5 millimetres.
  • the width of the air channelling element may be substantially the same as the width of the aerosol-generating article.
  • the air channelling element may have a width of at least 5 millimetres, at least 6 millimetres, or at least 7 millimetres.
  • the air channelling element may have a width of less than or equal to 12 millimetres, less than or equal to 10 millimetres, or less than or equal to 8 millimetres.
  • the air channelling element may have a width of 7.1 millimetres.
  • the outer tube may have a width of at least 5 millimetres, at least 6 millimetres, or at least 7 millimetres.
  • the outer tube may have a width of less than or equal to 12 millimetres, less than or equal to 10 millimetres, or less than or equal to 8 millimetres.
  • the outer tube may have a width of 7.1 millimetres.
  • the aerosol-generating article may comprise one or more ventilation zones configured to establish fluid communication between the exterior of the aerosol-generating article and the interior of the air channelling element.
  • the aerosol-generating article may comprise one or more ventilation zones at a location along the air channelling element.
  • the aerosol-generating article may comprise a single ventilation zone at a location along the air channelling element.
  • the aerosol-generating article may comprise one or more ventilation zones configured to establish fluid communication between the exterior of the aerosol-generating article and the interior of the outer tube.
  • the aerosol-generating article comprises a ventilation zone at a location along the outer tube.
  • the aerosol-generating article may comprise one or more ventilation zones at a location along the outer tube.
  • the aerosol-generating article may comprise a single ventilation zone at a location along the outer tube.
  • the aerosol-generating article may comprise a plurality of ventilation zones at a location along the outer tube.
  • a ventilation zone may comprise one or more rows of apertures, or perforations, extending through the outer tube.
  • a ventilation zone may comprise one or more rows of apertures, or perforations, extending through a wrapper of the aerosol-generating article.
  • a ventilation zone may comprise one or more rows of apertures, or perforations, extending through both a wrapper of the aerosol-generating article and the outer tube.
  • a ventilation zone may comprise a single row of apertures, or perforations.
  • a row of apertures, or perforations may comprise between 8 to 30 apertures, or perforations.
  • Each aperture, or perforation may have an opening area of at least 0.01 square millimetres.
  • Each aperture, or perforation may have an opening area of less than or equal to 1 square millimetre.
  • Each aperture, or perforation may have a maximum dimension of at least 0.1 millimetre.
  • Each aperture, or perforation may have a maximum dimension of less than or equal to 1 millimetre.
  • a ventilation zone may circumscribe the aerosol-generating article.
  • a ventilation zone may circumscribe the air channelling element or outer tube of the air channelling element.
  • a ventilation zone may comprise one or more circumferential rows of apertures, or perforations.
  • the aerosol-generating article comprises a ventilation zone at a location along the outer tube and downstream of the upstream end of the inner body.
  • the aerosol-generating article may comprise a ventilation zone at a location along the outer tube and downstream of the upstream end of the inner channel.
  • the ventilation zone may be configured to establish fluid communication between the exterior of the aerosol-generating article and the one or more peripheral channels.
  • a ventilation zone at a location along the outer tube and downstream of the upstream end of the inner body may efficiently cool aerosol in the one or more peripheral channels due to a smaller volume of aerosol passing through the one or more peripheral channels compared to the volume of aerosol generated by the aerosol-generating substrate. This may help to avoid a user experiencing an uncomfortably warm sensation on the lips of the user during use of the aerosol-generating article.
  • the ventilation zone may be located less than or equal to 50 percent of the length of the inner body downstream of the upstream end of the inner body.
  • the ventilation zone may be located downstream of the upstream end of the inner by less than or equal to 50 percent of the length of the inner body.
  • the ventilation zone may be located downstream of the upstream end of the inner body and closer to the upstream end of the inner body than to the downstream end of the inner body.
  • the ventilation zone may be located less than or equal to 40 percent, or less than or equal to 30 percent of the length of the inner body downstream of the upstream end of the inner body.
  • the ventilation zone may be located at least 10 percent of the length of the inner body downstream of the upstream end of the inner body.
  • the ventilation zone may be located between 10 percent and 50 percent, between 10 percent and 40 percent, or between 10 percent and 30 percent of the length of the inner body downstream of the upstream end of the inner body.
  • a ventilation zone located closer to the upstream end of the inner body than the downstream end may help to efficiently cool aerosol in one or more peripheral channels along a majority of the length of the peripheral channel. This may help to avoid a user experiencing an uncomfortably warm sensation on the lips of the user during use of the aerosol-generating article.
  • Cooling of aerosol along a majority of the length of the peripheral channel may help to cool aerosol in the inner channel along a corresponding length by conduction.
  • Locating a ventilation zone closer to the upstream end of the inner body than the downstream end may help to avoid the ventilation zone being blocked by the lips of a user.
  • the ventilation zone may be located less than or equal to 4 millimetres, less than or equal to 3 millimetres, or less than or equal to 2 millimetre downstream of the upstream end of the inner body.
  • the ventilation zone may be located at least 1 millimetre downstream of the upstream end of the inner body.
  • the ventilation zone may be located between 1 millimetre and 4 millimetres, between 1 millimetre and 3 millimetres, or between 1 millimetre and 2 millimetres downstream of the upstream end of the inner body.
  • the aerosol-generating article may comprise another ventilation zone located along the outer tube and upstream of the upstream end of the inner body.
  • the ventilation zone may be configured to establish fluid communication between the exterior of the aerosol-generating article and the cavity.
  • a ventilation zone located along the outer tube and upstream of the upstream end of the inner body may provide a cooling and diluting effect to aerosol generated by the aerosol-generating substrate prior to any segregation of aerosol by the inner body. Such a ventilation zone may therefore provide a cooling and diluting effect to aerosol across the air channelling element.
  • admission of air into the outer tube through a ventilation zone located along the outer tube and upstream of the upstream end of the inner body may direct warmer aerosol in a central region of the outer tube through the inner channel. This may help to avoid a user experiencing an uncomfortably warm sensation on the lips of the user during use of the aerosol-generating article.
  • the aerosol-generating article may comprise both a ventilation zone located along the outer tube and downstream of the upstream end of the inner body, and a ventilation zone located along the outer tube and upstream of the upstream end of the inner body.
  • the ventilation zone located along the outer tube and downstream of the upstream end of the inner body may be referred to as a first ventilation zone or downstream ventilation zone
  • the ventilation zone located along the outer tube and upstream of the upstream end of the inner body may be referred to as a second ventilation zone or upstream ventilation zone.
  • the ventilation level of the second ventilation zone may be greater than the ventilation level of the first ventilation zone. This may help to reduce the average temperature of aerosol delivered to a user across the aerosol-generating article to an acceptable level, while minimising any variation in temperature of aerosol across the aerosol-generating article.
  • the ventilation level of the second ventilation zone may be at least 1.2 times, at least 1.5 times, or at least 2 times the ventilation level of the first ventilation zone.
  • the ventilation level of the second ventilation zone may be less than or equal to 3 times the ventilation level of the first ventilation zone.
  • the ventilation level of the second ventilation zone may be between 1.2 times and 3 times, between 1.5 times and 3 times, or between 2 times and 3 times the ventilation level of the first ventilation zone.
  • the ventilation level of a first ventilation zone may be measured by occluding all other ventilation zones, if present, and drawing air from the mouth end of the aerosol-generating article so that air may flow through the front end or upstream end of the aerosol-generating article and the first ventilation zone into the aerosol-generating article.
  • the ventilation level provided by the first ventilation level may be defined as the volume ratio between the airflow entering the aerosol-generating article through the first ventilation zone and the airflow exiting the aerosol-generating article at the mouth end when measured as such.
  • the ventilation level of a second ventilation zone may be measured by occluding all other ventilation zones, if present, and drawing air from the mouth end of the aerosol-generating article so that air may flow through the front end or upstream end of the aerosol-generating article and the second ventilation zone into the aerosol-generating article.
  • the ventilation level provided by the second ventilation level may be defined as the volume ratio between the airflow entering the aerosol-generating article through the second ventilation zone and the airflow exiting the aerosol-generating article at the mouth end when measured as such.
  • the first ventilation zone may have a ventilation level of at least 10 percent.
  • the first ventilation zone may have a ventilation level of less than or equal to 25 percent, less than or equal to 20 percent, or less than or equal to 15 percent.
  • the second ventilation zone may have a ventilation level of at least 25 percent, at least 30 percent, or at least 35 percent.
  • the second ventilation zone may have a ventilation level of less than or equal to 40 percent.
  • the resistance to draw through the first ventilation zone may be greater than the resistance to draw through the second ventilation zone. As such, more air may be drawn through the second ventilation zone than through the first ventilation zone during use of the aerosol-generating article.
  • the total opening area of the plurality of apertures of the second ventilation zone may be greater than the total opening area of the plurality of apertures of the first ventilation zone.
  • the total opening area of the plurality of apertures of the second ventilation zone may be at least 1.2 times, at least 1.5 times, or at least 2 times the total opening area of the plurality of apertures of the first ventilation zone.
  • the total opening area of the plurality of apertures of the second ventilation zone may be less than or equal to 3 times the total opening area of the plurality of apertures of the first ventilation zone.
  • the aerosol-generating article may have a total ventilation level of at least 10 percent, at least 20 percent, or at least 30 percent.
  • the aerosol-generating article may have a ventilation level of between 20 percent and 60 percent, between 20 percent and 50 percent, or between 20 percent and 40 percent.
  • the total ventilation level of the aerosol-generating article may be measured by not occluding any of the ventilation zones present in the aerosol-generating article and drawing air from the mouth end of the aerosol-generating article of that air may flow through the front end or upstream end of the aerosol-generating article and the ventilation zones into the aerosol-generating article.
  • the total ventilation level of the aerosol-generating article may be defined as the volume ratio between the sum of the airflow entering the aerosol-generating article through each of the ventilation zones and the airflow exiting the aerosol-generating article at the mouth end.
  • a ventilation zone may not extend through the inner body of the air channelling element.
  • a plurality of apertures, or perforations, of a ventilation zone may not extend through the inner body of the air channelling element.
  • the inner body may not comprise an aperture or perforation extending through a side wall of the inner body.
  • the air channelling element may be configured to establish fluid communication between the inner channel and one or more peripheral channels of the air channelling element.
  • the air channelling element may be configured such that during use of the aerosol-generating article, aerosol may be drawn from the one or more peripheral channels into the inner channel. This may help to enhance nucleation of aerosol particles in the inner channel and cool the aerosol in the inner channel.
  • the aerosol-generating article may comprise a plurality of apertures or perforations through a wall of the inner body to establish fluid communication between the inner channel and one or more peripheral channels of the air channelling element.
  • the aerosol-generating article may comprise a plurality of apertures or perforations through a wall of a central portion of the inner body.
  • the ventilation zone may extend longitudinally along the inner body.
  • the inner channel may have any suitable cross-sectional shape.
  • the inner channel may have a substantially circular or substantially triangular cross-sectional shape.
  • the inner channel may have a substantially rectangular or hexagonal cross-sectional shape.
  • the inner channel may have an irregular cross-sectional shape.
  • the inner channel may be substantially cylindrical.
  • the inner body may comprise a central portion defining the inner channel.
  • the central portion may circumscribe the inner channel.
  • the central portion may be arranged such that the central or longitudinal axis of the aerosol-generating article may pass through the inner channel.
  • the central portion of the inner body may extend substantially the entire length of the inner body. In other words, the central portion may extend from the upstream end of the inner body to the downstream end of the inner body. The central portion of the inner body may extend substantially the entire length of the inner channel.
  • the central portion of the inner body may have any suitable cross-sectional shape.
  • the central portion of the inner body may have a substantially circular, triangular, rectangular or hexagonal cross-sectional shape.
  • the central portion of the inner body may have an irregular cross-sectional shape.
  • the central portion of the inner body may have a substantially constant cross-sectional shape and size along the entire length of the central portion.
  • the central portion of the inner body may be substantially tubular.
  • the inner body may comprise at least two extension portions in contact with an internal surface of the outer tube.
  • the at least two extension portions may act as retention means to help to retain the inner body in the outer tube.
  • the at least two extension portions may act as retention means to help to centre the inner body within the outer tube.
  • Each extension portion may extend from the central portion of the inner body to the outer tube. Each extension portion may extend outwardly from the central portion of the inner body to the outer tube. Each extension portion may extend radially from the central portion of the inner body to the outer tube.
  • the at least two extension portions may divide the space between the outer tube and the central portion of the inner body into one or more peripheral channels.
  • the at least two extension portions may be substantially equally spaced around the central portion. Where the inner body comprises two extension portions, the extension portions may extend along the same plane. Where the inner body comprises two extension portions, the extension portions may be parallel to each other.
  • Each extension portion may have a substantially constant thickness.
  • Each extension portion may have a substantially constant width along a transverse direction.
  • Each extension portion may be substantially planar.
  • Each extension portion may have a proximal end connected to the central portion and a distal end that engages with the internal surface of the outer tube.
  • the proximal end of each extension portion may be open.
  • the distal end of each extension portion may be open or closed.
  • Both the central portion of the inner body and the at least two extension portions of the inner body may define the inner channel.
  • Each extension portion may define a part of the inner channel.
  • Each extension portion may comprise two extension walls extending from the central portion of the inner body to the outer tube, wherein a space is defined between the two extension walls.
  • the space defined between the two extension walls may form a part of the inner channel.
  • the space defined between the two extension walls may be empty.
  • the two extension walls may be substantially parallel.
  • Each extension portion may be defined substantially by two substantially parallel extension walls.
  • the air channelling element may comprise; an outer tube; an inner body located within the outer tube; an inner channel defined within the inner body, wherein the inner body comprises a central portion and at least two extension portions, wherein both the central portion of the inner body and the at least two extension portions of the inner body define the inner channel, wherein each extension portion comprises two substantially parallel extension walls extending from the central portion of the inner body to the outer tube.
  • a ratio of the thickness of each extension portion to the width of the central portion may be less than or equal to 0.5, or less than or equal to 0.25.
  • a ratio of the thickness of each extension portion to the width of the central portion may be at least 0.1.
  • a ratio of the thickness of each extension portion to the width of the central portion may be between 0.1 and 0.5, or between 0.1 and 0.25.
  • the thickness of an extension portion may be measured in the direction substantially perpendicular to the direction in which the extension portion extends from the central portion of the inner body to the outer tube. Where an extension portion comprises two substantially parallel extension walls, the thickness of the extension portion is measured perpendicularly to the extension walls.
  • Each extension portion may not define a part of the inner channel.
  • Each extension portion may comprise a single wall extending from the central portion of the inner body to the outer tube.
  • Each extension portion may comprise a fin extending from the central portion of the inner body to the outer tube.
  • Each extension portion may comprise a fin extending from the central portion of the inner body to the outer tube.
  • the inner body may comprise up to six, up to five, up to four, or up to three extension portions.
  • the inner body may have only two, three, four, five, or six extension portions.
  • Each of the extension portions may extend the entire length of the inner body.
  • the maximum width of the inner body may substantially correspond to the internal diameter of the outer tube. Such a maximum width may be measured from the distal end of a first extension portion to the distal end of a second extension portion.
  • the inner body may comprise an upstream end wall at the upstream end of the central portion.
  • the upstream end wall may delimit an opening for airflow between the inner channel and the exterior of the inner body. Airflow into the inner channel via the opening may increase a level of turbulence of the flow in the inner channel. This may increase nucleation of aerosol particles in the inner channel and help to cool the aerosol in the inner channel.
  • the upstream end wall may be a folded end portion of the inner body.
  • the inner body may be integrally formed.
  • the central portion and the at least two extension portions may be integrally formed.
  • the inner body may be formed from a single sheet of material.
  • the inner body may be formed from folding a single sheet of material. The distal end of each extension portion may be closed.
  • the components of the inner body may be inserted into the outer tube in opposite orientations and parallel to each other (both longitudinally and transversely) to form the inner body.
  • the central raised portions of the opposing components of the inner body may cooperate with each other to form a central portion of the inner body that is substantially tubular.
  • the other portions (in other words, the non-raised portions) may cooperate with each other to form two extension portions of the inner body.
  • the inner channel may be defined between both components.
  • the distal ends of the extensions portions may be open.
  • the inner channel may be substantially empty.
  • the inner channel may be at least partially filled.
  • the air channelling element may comprise a porous body located within the inner channel.
  • the air channelling element may comprise a polylactic acid (PLA) film located in the inner channel. This may improve cooling of aerosol flowing through the inner channel.
  • PLA polylactic acid
  • the aerosol-generating article may comprises one or more ventilation zones extending along the air channelling element. Such ventilation zones may be referred to as longitudinal ventilation zones.
  • the one or more longitudinal ventilation zones may extend longitudinally along the length of the outer tube.
  • the length of the one or more longitudinal ventilation zones may correspond to the length of the inner body.
  • Each longitudinal ventilation zone may span from the upstream end of the inner body to the downstream end of the inner body.
  • the longitudinal ventilation zone may be configured to establish fluid communication between the exterior of the air channelling element and the inner channel via a distal end of one of the extension portions.
  • the longitudinal ventilation zone may be configured to establish fluid communication between the exterior of the air channelling element and the inner channel via the end of one of the extension portions which engages with the outer tube.
  • Each longitudinal ventilation zone may be aligned with the distal end of each extension portion.
  • Each longitudinal ventilation zone is configured to configured to establish fluid communication between the exterior of the air channelling element and the inner channel via the distal end of the extension portion. External air may enter the inner channel via the one or more longitudinal ventilation zones.
  • Each longitudinal ventilation zone may comprise a line of perforations extending through the wall of the outer tube. Such line of perforations may extend through any wrappers (not shown) circumscribing the outer tube.
  • the outer tube may comprise or be formed from one or more tubular segments.
  • the tubular segments are non-integral with one another. In other words, the tubular segments are physically distinct from one another.
  • the outer tube may comprise one or more tubular segments in an abutting end-to-end arrangement.
  • the outer tube comprises a single tubular segment.
  • the outer tube is a single tube.
  • the outer tube may comprise a plurality of tubular segments.
  • the outer tube may comprise or be formed from two tubular segments: a first tubular segment and a second tubular segment located upstream of the first tubular segment.
  • the second tubular segment may be substantially empty. In other words, a cavity may be defined by the internal surface of the second tubular segment.
  • the inner body may be located within the first tubular segment.
  • the upstream end of the inner body may be substantially aligned with the upstream end of the first tubular segment.
  • the downstream end of the inner body may be substantially aligned with the downstream end of the first tubular segment.
  • an air channelling element having an outer tube comprising a first tubular segment and a second tubular segment located upstream of the first tubular segment; a first ventilation zone; and a second ventilation zone
  • the first ventilation zone may be at a location along the first tubular segment
  • the second ventilation zone may be at a location along the second tubular segment.
  • the upstream end of the second tubular segment may define the upstream end of the outer tube.
  • the downstream end of the first tubular segment may define the downstream end of the outer tube.
  • the second tubular segment may extend from the upstream end of the outer tube to the upstream end of the inner tube.
  • the first tubular segment may extend from the downstream end of the second tubular segment to the downstream end of the outer tube.
  • the outer tube may have a substantially constant cross-sectional shape and size along the entire length of the outer tube.
  • the outer tube may be substantially cylindrical.
  • the outer tube may be formed from any suitable material. Suitable materials include, but are not limited to: paper based materials, such as paper and cardboard; and polylactic acid (PLA). Preferably, the outer tube is formed from a paper based material.
  • the outer tube and the inner body may be separately formed.
  • the outer tube and the inner body may be integrally formed.
  • the inner body may extend to the downstream end of the air channelling element.
  • the inner body may extend from the downstream end of the air channelling element towards the upstream end of the air channelling element.
  • the inner body may extend from the downstream end of the air channelling element to the upstream end of the air channelling element.
  • the downstream end of the inner body may be longitudinally aligned with the downstream end of the outer tube.
  • the air channelling element may comprise a porous body surrounding at least a part of the inner body. This may help to retain the inner body within the outer tube. This may particularly be the case where the inner body is not in contact with the outer tube.
  • the air channelling element may comprise a porous body surrounding the inner body where the inner body does not comprise an extension portion in contact with the outer tube.
  • the porous body may be annular.
  • the porous body may have substantially the same width as the internal width of the outer tube.
  • the porous body may extend from a downstream end of the inner body towards the upstream end of the inner body.
  • the porous body may extend from an upstream end of the inner body towards the downstream end of the inner body.
  • the porous body may extend from the downstream end of the inner body to the upstream end of the inner body.
  • the aerosol-generating substrate may have a length of at least 4 millimetres, at least 6 millimetres, at least 8 millimetres, or at least 10 millimetres.
  • the aerosol-generating substrate may have a length of less than or equal to 45 millimetres, less than or equal to 35 millimetres, less than or equal to 25 millimetres, or less than or equal to 15 millimetres.
  • the aerosol-generating substrate may have a length of between 8 millimetres and 45 millimetres, between 8 millimetres and 35 millimetres, between 8 millimetres and 25 millimetres, or between 8 millimetres and 15 millimetres.
  • the aerosol-generating substrate may have a substantially circular cross-section.
  • the aerosol-generating substrate may have a density of at least 100 milligrams per cubic centimetre, at least 150 milligrams per cubic centimetre, at least 200 milligrams per cubic centimetre at least 250 milligrams per cubic centimetre, or at least 275 milligrams per cubic centimetre.
  • the aerosol former may be any suitable known compound or mixture of compounds that, in use, facilitates formation of a dense and stable aerosol.
  • the aerosol former may be substantially resistant to thermal degradation at temperatures typically reached during use of the aerosol-generating article.
  • the aerosol-generating material may comprise less than or equal to 85 percent by weight of aerosol former, less than or equal to 80 percent by weight of aerosol former, or less than or equal to 75 percent by weight of aerosol former.
  • the aerosol-generating material may comprise between 50 percent and 85 percent by weight of aerosol former, between 50 percent and 80 percent by weight of aerosol former, or between 50 percent and 75 percent by weight of aerosol former.
  • the aerosol-generating material may comprise between 60 percent and 85 percent by weight of aerosol former, between 60 percent and 80 percent by weight of aerosol former, or between 60 percent and 75 percent by weight of aerosol former.
  • the aerosol-generating material may comprise between 70 percent and 85 percent by weight of aerosol former, between 70 percent and 80 percent by weight of aerosol former, or between 70 percent and 75 percent by weight of aerosol former.
  • the aerosol-generating material may comprise nicotine.
  • the aerosol-generating material may comprise natural nicotine, or synthetic nicotine, or a combination of natural nicotine and synthetic nicotine.
  • the aerosol-generating material may comprise at least 0.5 percent by weight of nicotine, at least 1 percent by weight of nicotine, at least 1.5 percent by weight of nicotine, or at least 2 percent by weight of nicotine. That is, the aerosol-generating material may have a nicotine content of at least 0.5 percent by weight, at least 1 percent by weight, at least 1.5 percent by weight, or at least 2 percent by weight.
  • the aerosol-generating material may comprise between 1 percent and 10 percent by weight of nicotine, between 1 percent and 8 percent by weight of nicotine, between 1 percent and 6 percent by weight of nicotine, or between 1 percent and 4 percent by weight of nicotine.
  • the aerosol-generating article may comprise an internal heating element located within the aerosol-generating substrate.
  • the aerosol-generating device of the aerosol-generating system may comprise an internal heating element for insertion into the aerosol-generating substrate of the aerosol-generating article.
  • the internal heating element may have a width of between 0.5 millimetres and 8 millimetres, between 0.5 millimetres and 7 millimetres, between 0.5 millimetres and 6 millimetres, between 0.5 millimetres and 5 millimetres, or between 0.5 millimetres and 4 millimetres.
  • the internal heating element may be substantially cylindrical.
  • the internal heating element may have a thickness substantially the same as the width thereof.
  • the internal heating element may have a substantially circular cross-section.
  • the internal heating element may have the form of a needle or a pin.
  • the internal heating element may have a diameter of at least 0.5 millimetres, at least 1 millimetre, at least 1.5 millimetres, at least 2 millimetres, or at least 2.5 millimetres.
  • the internal heating element may have a diameter of less than or equal to 5 millimetres, less than or equal to 4.5 millimetres, less than or equal to 4 millimetres, less than or equal to 3.5 millimetres, or less than or equal to 3 millimetres.
  • the internal heating element may have a diameter of between 0.5 millimetres and 5 millimetres, between 0.5 millimetres and 4.5 millimetres, between 0.5 millimetres and 4 millimetres, between 0.5 millimetres and 3.5 millimetres, or between 0.5 millimetres and 3 millimetres.
  • the internal heating element may have a width greater than the thickness thereof.
  • the internal heating element may have a substantially rectangular cross-section.
  • the internal heating element may have the form of a blade or a strip.
  • the internal heating element may have a substantially constant cross-section along the length of the internal heating element.
  • the internal heating element may have a thickness of at least 0.01 millimetres, at least 0.02 millimetres, at least 0.03 millimetres, or at least 0.05 millimetres.
  • the internal heating element may have a thickness of less than or equal to 2 millimetres, less than or equal to 1 millimetre, less than or equal to 0.5 millimetres, or less than or equal to 0.1 millimetres.
  • the internal heating element may have a thickness of between 0.01 millimetres and 2 millimetres, between 0.01 millimetres and 1 millimetre, between 0.01 millimetres and 0.5 millimetres, or between 0.01 millimetres and 0.1 millimetres.
  • the internal heating element may have a thickness of 60 micrometres.
  • the internal heating element of the article may be located within the aerosol-generating substrate.
  • the internal heating element may be arranged substantially longitudinally within the aerosol-generating substrate. That is, a longitudinal axis of the internal heating element may be approximately parallel to a longitudinal axis of the aerosol-generating substrate.
  • a longitudinal axis of the internal heating element may be within plus or minus 10 degrees of parallel to a longitudinal axis of the aerosol-generating substrate.
  • the internal heating element may be arranged centrally within the aerosol-generating substrate.
  • the internal heating element may extend along a longitudinal axis of the aerosol-generating substrate.
  • the internal heating element may extend from a downstream end of the aerosol-generating substrate towards an upstream end of the aerosol-generating substrate.
  • the internal heating element may extend from an upstream end of the aerosol-generating substrate towards a downstream end of the aerosol-generating substrate.
  • the internal heating element may extend from an upstream end of the aerosol-generating substrate to a downstream end of the aerosol-generating substrate. That is, the internal heating element may extend along the entire length of the aerosol-generating substrate.
  • the length of the internal heating element may be substantially the same as the length of the aerosol-generating substrate.
  • the internal heating element may extend part way along the length of the aerosol-generating substrate.
  • the internal heating element may be spaced apart from a downstream end of the aerosol-generating substrate.
  • the internal heating element may be spaced apart from both a downstream end and an upstream end of the aerosol-generating substrate.
  • the upstream section, or upstream element thereof, may also additionally provide a degree of protection to the aerosol-generating substrate during storage, as the presence of an upstream section offsets the aerosol-generating substrate away from the upstream end of the article and also covers at least to some extent the upstream end of the aerosol-generating substrate, which may otherwise be exposed.
  • An upstream element may comprise or be a plug element.
  • An upstream element may comprise or be a porous plug element.
  • An upstream element may be formed of a solid cylindrical plug element having a filled cross-section. Such a plug element may be referred to as a 'plain' element.
  • the solid plug element may be porous, as described above, but does not have a tubular form and therefore does not provide a longitudinal flow channel.
  • the solid plug element may have a substantially uniform transverse cross section.
  • the susceptor element may comprise a protective coating.
  • the susceptor element may comprise a protective coating formed by a glass, a ceramic, or an inert metal.
  • the aerosol-generating article 2 shown in Figure 2 differs from the aerosol-generating article 1 shown in Figure 1 in that the air channelling element 31 of the aerosol-generating article 2 comprises retention means in the form of an annular retention element 23.
  • the outer surface of the retention element 23 engages with the internal surface of the outer tube 22 and the internal surface of the retention element 23 engages with the external surface of the inner body 24. This enables the retention element 23 to retain and centre the inner body 24 within the outer tube 22, while also obstructing the upstream end of the peripheral channel 28 defined between the outer tube 22 and the inner body 24.
  • the retention element 23 is made from a material having a relatively low porosity in order to limit airflow into the peripheral channel 28.
  • the retention element 23 is located at the upstream end of the peripheral channel 28.
  • the retention element 23 may comprise cellulose acetate.
  • the retention element 23 surrounds an upstream section of the inner body 24. As shown in Figure 2 , the retention element 23 extends downstream from the upstream end of the inner body 24.
  • the retention element 23 has a length of 2 mm.
  • the inner body 24 is shorter than the outer tube 22.
  • the length of the outer tube 22 defines the length of the air channelling element 30.
  • the inner body 24 has a length of 7 mm.
  • the outer tube 22 has a length of 21 mm.
  • the upstream end 25a of the inner body 24 is offset longitudinally from the upstream end 27a of the outer tube 22.
  • the downstream end 25b of the inner body 24 is aligned longitudinally from the downstream end 27b of the outer tube 22. Therefore, the longitudinal distance between the upstream end 25a of the inner body 24 and the upstream end 27a of the outer tube 22 is 14 mm.
  • Such an offset provides an empty cavity 29 within the outer tube 22 and immediately downstream of the aerosol-generating substrate 12 and immediately upstream of the inner body 24.
  • the empty cavity 29 is effectively 14 mm long.
  • the aerosol-generating article 1 comprises two ventilation zones 15, 17 (first ventilation zone 15, second ventilation zone 17) at a location along the downstream section 14.
  • the first ventilation zone 15 is located downstream of the second ventilation zone 17.
  • the first ventilation zone 15 is located downstream of the upstream end 25a of the inner body 24.
  • the distance between the first ventilation zone 15 and the downstream end of the downstream section 14 (or downstream end of the aerosol-generating article 1, 2) is 12 millimetres.
  • the distance between the first ventilation zone 15 and the downstream end of the aerosol-generating substrate 12 is 16 millimetres.
  • the distance between the first ventilation zone 15 and the upstream end of the aerosol-generating substrate 12 is 28 millimetres.
  • the second ventilation zone 17 is located upstream of the upstream end 25a of the inner body 24.
  • the distance between the second ventilation zone 17 and the downstream end of the downstream section 14 (or downstream end of the aerosol-generating article 1, 2) is 16 millimetres.
  • the distance between the second ventilation zone 17 and the downstream end of the aerosol-generating substrate 12 is 12 millimetres.
  • the distance between the second ventilation zone 17 and the upstream end of the aerosol-generating substrate 12 is 24 millimetres.
  • the first and second ventilation zones 15, 17 are both at a location along the air channelling element 30.
  • the ventilation zones 15, 17 each comprise a circumferential row of perforations.
  • the perforations extend through the peripheral wall of the outer tube 22 of the air channelling element 30. In use, the perforations allow air flow from the exterior of the aerosol-generating article 1 into the air channelling element 30.
  • the second ventilation zone 17 is configured to provide ventilating airflow into the cavity 29 before the inner body 24, while the first ventilation zone 15 is configured to provide ventilating airflow into the one or more peripheral channels 28.
  • the perforations of both ventilation zones 15, 17 also extend through any wrapping material surrounding the air channelling element 30.
  • the upstream section 16 comprises an upstream element 13.
  • the upstream element 13 is located immediately upstream of the aerosol-generating substrate 12.
  • the downstream end of the upstream element 13 abuts the upstream end of the aerosol-generating substrate 12.
  • the upstream end of the upstream element 13 corresponds to the upstream end of the aerosol-generating article 1, 2.
  • the upstream element 13 has a length of 5 millimetres.
  • the upstream element 13 is a cylindrical plug of cellulose acetate circumscribed by a wrapper (not shown).
  • Figures 3a & 3b shows an air channelling element 32 for use in an aerosol-generating article.
  • a portion of the peripheral wall of the outer tube 22 is shown as being transparent for visualisation purposes to show the interior of the air channelling element 32 and the inner body 241 thereof.
  • the inner body 241 of the air channelling element 32 comprises a central portion 41 and extension portions 51 extending outwardly from the central portion 41.
  • the central portion 41 is a cylindrical hollow tube.
  • the central portion 41 of the inner body 241 defines the inner channel 26.
  • the extension portions 51 are fins circumferentially and longitudinally distributed around and along the central portion 41. The extension portions 51 engage with the peripheral wall of the outer tube 22 so as to retain and centre the inner body 241 within the outer tube 22.
  • Figures 4a & 4b shows an air channelling element 33 for use in an aerosol-generating article.
  • a portion of the peripheral wall of the outer tube 22 is shown as being transparent for visualisation purposes to show the interior of the air channelling element 33 and the inner body 242 thereof.
  • the inner body 242 of the air channelling element 33 comprises a central portion 42 and extension portion 71 extending (radially) outwardly from the central portion 42.
  • the extension portion 71 is effectively located at the downstream end 25b of the inner body 242.
  • the central portion 42 is a hexagonal hollow tube.
  • the central portion 42 of the inner body 242 defines the inner channel 26.
  • the extension portion 71 engages with the peripheral wall of the outer tube 22 so as to retain and centre the inner body 242 within the outer tube 22.
  • the aerosol-generating articles of the specific embodiment described above may further comprise a susceptor element arranged longitudinally within the aerosol-generating substrate.
  • the susceptor may be positioned centrally within the aerosol-generating substrate and may extend along the longitudinal axis of the aerosol-generating article.
  • the susceptor element may be in accordance with any description within the present disclosure related to a susceptor element or a susceptor.

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EP23217664.4A 2023-12-18 2023-12-18 Article de génération d'aérosol ayant un élément de canalisation d'air Pending EP4573933A1 (fr)

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EP23217664.4A EP4573933A1 (fr) 2023-12-18 2023-12-18 Article de génération d'aérosol ayant un élément de canalisation d'air

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Application Number Priority Date Filing Date Title
EP23217664.4A EP4573933A1 (fr) 2023-12-18 2023-12-18 Article de génération d'aérosol ayant un élément de canalisation d'air

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593707A (en) * 1984-06-20 1986-06-10 H.F. & Ph.F. Reemtsma Gmbh & Co. Variably ventilated filter cigarette
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
CN116568162A (zh) * 2020-12-17 2023-08-08 菲利普莫里斯生产公司 包括双气溶胶生成基质的气溶胶生成制品
US20230337725A1 (en) * 2019-12-20 2023-10-26 Nicoventures Trading Limited Component for use in an aerosol provision system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593707A (en) * 1984-06-20 1986-06-10 H.F. & Ph.F. Reemtsma Gmbh & Co. Variably ventilated filter cigarette
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
US20230337725A1 (en) * 2019-12-20 2023-10-26 Nicoventures Trading Limited Component for use in an aerosol provision system
CN116568162A (zh) * 2020-12-17 2023-08-08 菲利普莫里斯生产公司 包括双气溶胶生成基质的气溶胶生成制品

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