US20250234918A1 - Aerosol-generating article comprising a ventilation zone downstream of a downstream filter segment - Google Patents

Aerosol-generating article comprising a ventilation zone downstream of a downstream filter segment

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Publication number
US20250234918A1
US20250234918A1 US18/853,644 US202318853644A US2025234918A1 US 20250234918 A1 US20250234918 A1 US 20250234918A1 US 202318853644 A US202318853644 A US 202318853644A US 2025234918 A1 US2025234918 A1 US 2025234918A1
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United States
Prior art keywords
aerosol
millimetres
downstream
hollow tubular
length
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Pending
Application number
US18/853,644
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English (en)
Inventor
Cyrille Poindron
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Philip Morris Products SA
Original Assignee
Philip Morris Products SA
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Filing date
Publication date
Application filed by Philip Morris Products SA filed Critical Philip Morris Products SA
Assigned to PHILIP MORRIS PRODUCTS S.A. reassignment PHILIP MORRIS PRODUCTS S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POINDRON, CYRILLE
Publication of US20250234918A1 publication Critical patent/US20250234918A1/en
Pending legal-status Critical Current

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Classifications

    • 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
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • A24D1/027—Cigars; Cigarettes with special covers with ventilating means, e.g. perforations
    • 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
    • A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
    • A24D1/045—Cigars; Cigarettes with mouthpieces or filter-tips with smoke filter means
    • 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
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
    • 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
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
    • A24D3/18—Mouthpieces of cigars or cigarettes; Manufacture thereof
    • 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
    • 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

Definitions

  • the tobacco material has a bulk density of less than 290 milligrams per cubic centimetre. Even more preferably, the tobacco material has a bulk density of less than 280 milligrams per cubic centimetre.
  • the tobacco material may have a bulk density of from 100 milligrams per cubic centimetre to 350 milligrams per cubic centimetre, preferably from 100 milligrams per cubic centimetre to 345 milligrams per cubic centimetre, more preferably from 125 milligrams per cubic centimetre to 325 milligrams per cubic centimetre, more preferably from 150 milligrams per cubic centimetre to 300 milligrams per cubic centimetre, more preferably from 150 milligrams per cubic centimetre to 290 milligrams per cubic centimetre, even more preferably from 200 milligrams per cubic centimetre to 280 milligrams per cubic centimetre.
  • the RTD of the rod of aerosol-generating substrate is from 4 millimetres H 2 O to 10 millimetres H 2 O, preferably from 5 millimetres H 2 O to 10 millimetres H 2 O, preferably from 6 millimetres H 2 O to 25 millimetres H 2 O. In other embodiments, the RTD of the rod of aerosol-generating substrate is from 4 millimetres H 2 O to 20 millimetres H 2 O, preferably from 5 millimetres H 2 O to 18 millimetres H 2 O preferably from 6 millimetres H 2 O to 16 millimetres H 2 O.
  • the aerosol-generating substrate may comprise between 5 percent and 30 percent by weight of aerosol former on a dry weight basis of the aerosol-generating substrate, more preferably between 6 percent and 25 percent by weight of aerosol former on a dry weight basis of the aerosol-generating substrate, more preferably between 10 percent and 20 percent by weight of aerosol former on a dry weight basis of the aerosol-generating substrate.
  • the aerosol-generating substrate may comprise between 5 percent and 30 percent by weight of glycerine on a dry weight basis of the aerosol-generating substrate, more preferably between 6 percent and 25 percent by weight of glycerine on a dry weight basis of the aerosol-generating substrate, more preferably between 10 percent and 20 percent by weight of glycerine on a dry weight basis of the aerosol-generating substrate.
  • the aerosol-generating substrate comprises shredded tobacco material.
  • the shredded tobacco material may be in the form of cut filler, as described in more detail below.
  • the shredded tobacco material may be in the form of a shredded sheet of homogenised tobacco material. Suitable homogenised tobacco materials for use in the present invention are described below.
  • cut filler is used to describe to a blend of shredded plant material, such as tobacco plant material, including, in particular, one or more of leaf lamina, processed stems and ribs, homogenised plant material.
  • the cut filler may also comprise other after-cut, filler tobacco or casing.
  • the cut filler comprises at least 25 percent of plant leaf lamina, more preferably, at least 50 percent of plant leaf lamina, still more preferably at least 75 percent of plant leaf lamina and most preferably at least 90 percent of plant leaf lamina.
  • the plant material is one of tobacco, mint, tea and cloves. Most preferably, the plant material is tobacco.
  • the invention is equally applicable to other plant material that has the ability to release substances upon the application of heat that can subsequently form an aerosol.
  • the cut filler comprises tobacco plant material comprising lamina of one or more of bright tobacco, dark tobacco, aromatic tobacco and filler tobacco.
  • tobacco describes any plant member of the genus Nicotiana .
  • Bright tobaccos are tobaccos with a generally large, light coloured leaves.
  • the term “bright tobacco” is used for tobaccos that have been flue cured. Examples for bright tobaccos are Chinese Flue-Cured, Flue-Cured Brazil, US Flue-Cured such as Virginia tobacco, Indian Flue-Cured, Flue-Cured from Africa or other African Flue Cured.
  • Bright tobacco is characterized by a high sugar to nitrogen ratio.
  • bright tobacco is a tobacco type which, after curing, is associated with a spicy and lively sensation.
  • bright tobaccos are tobaccos with a content of reducing sugars of between about 2.5 percent and about 20 percent of dry weight base of the leaf and a total ammonia content of less than about 0.12 percent of dry weight base of the leaf.
  • Reducing sugars comprise for example glucose or fructose.
  • Total ammonia comprises for example ammonia and ammonia salts.
  • dark tobaccos are tobaccos with a generally large, dark coloured leaves.
  • dark tobacco is used for tobaccos that have been air cured. Additionally, dark tobaccos may be fermented. Tobaccos that are used mainly for chewing, snuff, cigar, and pipe blends are also included in this category. Typically, these dark tobaccos are air cured and possibly fermented. From a sensorial perspective, dark tobacco is a tobacco type which, after curing, is associated with a smoky, dark cigar type sensation. Dark tobacco is characterized by a low sugar to nitrogen ratio. Examples for dark tobacco are Burley Malawi or other African Burley, Dark Cured Brazil Galpao , Sun Cured or Air Cured Indonesian Kasturi. According to the invention, dark tobaccos are tobaccos with a content of reducing sugars of less than about 5 percent of dry weight base of the leaf and a total ammonia content of up to about 0.5 percent of dry weight base of the leaf.
  • Aromatic tobaccos are tobaccos that often have small, light coloured leaves.
  • aromatic tobacco is used for other tobaccos that have a high aromatic content, e.g. of essential oils.
  • aromatic tobacco is a tobacco type which, after curing, is associated with spicy and aromatic sensation.
  • Example for aromatic tobaccos are Greek Oriental, Oriental Turkey, semi-oriental tobacco but also Fire Cured, US Burley, such as Perique, Rustica, US Burley or Meriland.
  • Filler tobacco is not a specific tobacco type, but it includes tobacco types which are mostly used to complement the other tobacco types used in the blend and do not bring a specific characteristic aroma direction to the final product.
  • Examples for filler tobaccos are stems, midrib or stalks of other tobacco types. A specific example may be flue cured stems of Flue Cure Brazil lower stalk.
  • the cut filler suitable to be used with the present invention generally may resemble cut filler used for conventional smoking articles.
  • the cut width of the cut filler preferably is between 0.3 millimetres and 2.0 millimetres, more preferably, the cut width of the cut filler is between 0.5 millimetres and 1.2 millimetres and most preferably, the cut width of the cut filler is between 0.6 millimetres and 0.9 millimetres.
  • the cut width may play a role in the distribution of heat inside the rod of aerosol-generating substrate. Also, the cut width may play a role in the resistance to draw of the article. Further, the cut width may impact the overall density of the aerosol-generating substrate as a whole.
  • the strand length of the cut-filler is to some extent a random value as the length of the strands will depend on the overall size of the object that the strand is cut off from. Nevertheless, by conditioning the material before cutting, for example by controlling the moisture content and the overall subtlety of the material, longer strands can be cut.
  • the strands Preferably, have a length of between about 10 millimetres and about 40 millimetres before the strands are collated to form the rod of aerosol-generating substrate.
  • the final rod of aerosol-generating substrate may comprise strands that are on average shorter than the initial strand length.
  • the strand length of the cut-filler is such that between about 20 percent and 60 percent of the strands extend along the full length of the rod of aerosol-generating substrate. This prevents the strands from dislodging easily from the rod of aerosol-generating substrate.
  • the weight of the cut filler is between 80 milligrams and 400 milligrams, preferably between 150 milligrams and 250 milligrams, more preferably between 170 milligrams and 220 milligrams.
  • This amount of cut filler typically allows for sufficient material for the formation of an aerosol. Additionally, in the light of the aforementioned constraints on diameter and size, this allows for a balanced density of the rod of aerosol-generating substrate between energy uptake, resistance to draw and fluid passageways within the rod of aerosol-generating substrate where the aerosol-generating substrate comprises plant material.
  • the cut filler is soaked with aerosol former. Soaking the cut filler can be done by spraying or by other suitable application methods.
  • the aerosol former may be applied to the blend during preparation of the cut filler.
  • the aerosol former may be applied to the blend in the direct conditioning casing cylinder (DCCC).
  • DCCC direct conditioning casing cylinder
  • Conventional machinery can be used for applying an aerosol former to the cut filler.
  • 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 facilitating that the aerosol is substantially resistant to thermal degradation at temperatures typically applied during use of the aerosol-generating article.
  • Suitable aerosol formers are for example to: polyhydric alcohols such as, for example, triethylene glycol, 1,3-butanediol, propylene glycol and glycerine; esters of polyhydric alcohols such as, for example, glycerol mono-, di- or triacetate; aliphatic esters of mono-, di- or polycarboxylic acids such as, for example, dimethyl dodecanedioate and dimethyl tetradecanedioate; and combinations thereof.
  • polyhydric alcohols such as, for example, triethylene glycol, 1,3-butanediol, propylene glycol and glycerine
  • esters of polyhydric alcohols such as, for example, glycerol mono-, di- or triacetate
  • aliphatic esters of mono-, di- or polycarboxylic acids such as, for example, dimethyl dodecanedioate and dimethyl tetradecanedioate
  • the aerosol former comprises one or more of glycerine and propylene glycol.
  • the aerosol former may consist of glycerine or propylene glycol or of a combination of glycerine and propylene glycol.
  • the amount of aerosol former is at least 5 percent by weight on a dry weight basis, preferably between 5 percent and 30 percent by weight on a dry weight basis of the cut filler, more preferably, the amount of aerosol former is between 6 percent and 20 percent by weight on a dry weight basis of the cut filler, for example the amount of aerosol former is between 8 percent and 15 percent by weight on a dry weight basis of the cut filler.
  • the cut filler may become relatively sticky.
  • the one or more sheets as described herein may each individually have a grammage of between 100 grams per square metre and 600 grams per square metre.
  • the one or more sheets as described herein may each individually have a density of from 0.3 grams per cubic centimetre to 1.3 grams per cubic centimetre, and preferably from 0.7 grams per cubic centimetre to 1.0 gram per cubic centimetre.
  • the one or more sheets of homogenised plant material may be cut into strands as referred to above.
  • the aerosol-generating substrate comprises a plurality of strands of the homogenised plant material.
  • the strands may be used to form a plug.
  • the width of such strands is about 5 millimetres, or about 4 millimetres, or about 3 millimetres, or about 2 millimetres or less.
  • the length of the strands may be greater than about 5 millimetres, between about 5 millimetres to about 15 millimetres, about 8 millimetres to about 12 millimetres, or about 12 millimetres.
  • the strands have substantially the same length as each other.
  • the homogenised plant material is a homogenised tobacco material comprising tobacco particles.
  • Sheets of homogenised tobacco material for use in such embodiments of the invention may have a tobacco content of at least about 40 percent by weight on a dry weight basis, more preferably of at least about 50 percent by weight on a dry weight basis more preferably at least about 70 percent by weight on a dry weight basis and most preferably at least about 90 percent by weight on a dry weight basis.
  • the homogenised plant material may have an aerosol former content of between 5 percent and 30 percent by weight on a dry weight basis, such as between 10 percent and 25 percent by weight on a dry weight basis, or between 15 percent and 20 percent by weight on a dry weight basis.
  • the aerosol former may act as a humectant in the homogenised plant material.
  • the strip or blade preferably has a rectangular shape having a width of preferably from 2 millimetres to 8 millimetres, more preferably from 3 millimetres to 5 millimetres.
  • a susceptor element in the form of a strip of blade may have a width of 4 millimetres.
  • the susceptor element has the form of a strip or blade
  • the strip or blade preferably has a rectangular shape and a thickness from 0.03 millimetres to 0.15 millimetres, more preferably from 0.05 millimetres to 0.09 millimetres.
  • a susceptor element in the form of a strip of blade may have a thickness of 0.07 millimetres.
  • the elongate susceptor element is in the form of a strip or blade, preferably has a rectangular shape, and has a thickness from 55 micrometres to 65 micrometres.
  • the elongate susceptor element has a thickness from 57 micrometres to 63 micrometres. Even more preferably, the elongate susceptor element has a thickness from 58 micrometres to 62 micrometres. In a particularly preferred embodiment, the elongate susceptor element has a thickness of 60 micrometres.
  • the elongate susceptor element has a length which is the same or shorter than the length of the aerosol-generating substrate.
  • the elongate susceptor element has a same length as the aerosol-generating substrate.
  • the susceptor element may be formed from any material that can be inductively heated to a temperature sufficient to generate an aerosol from the aerosol-generating substrate.
  • Preferred susceptor elements comprise a metal or carbon.
  • a preferred susceptor element may comprise or consist of a ferromagnetic material, for example a ferromagnetic alloy, ferritic iron, or a ferromagnetic steel or stainless steel.
  • a suitable susceptor element may be, or comprise, aluminium.
  • Preferred susceptor elements may be formed from 400 series stainless steels, for example grade 410, or grade 420, or grade 430 stainless steel. Different materials will dissipate different amounts of energy when positioned within electromagnetic fields having similar values of frequency and field strength.
  • parameters of the susceptor element such as material type, length, width, and thickness may all be altered to provide a desired power dissipation within a known electromagnetic field.
  • Preferred susceptor elements may be heated to a temperature in excess of 250 degrees Celsius.
  • Suitable susceptor elements may comprise a non-metallic core with a metal layer disposed on the non-metallic core, for example metallic tracks formed on a surface of a ceramic core.
  • a susceptor element may have a protective external layer, for example a protective ceramic layer or protective glass layer encapsulating the susceptor element.
  • the susceptor element may comprise a protective coating formed by a glass, a ceramic, or an inert metal, formed over a core of susceptor element material.
  • the susceptor element is arranged in thermal contact with the aerosol-generating substrate.
  • the susceptor element heats up the aerosol-generating substrate is heated up and an aerosol is formed.
  • the susceptor element is arranged in direct physical contact with the aerosol-generating substrate, for example within the aerosol-generating substrate.
  • the rod of aerosol-generating substrate may be circumscribed by a wrapper.
  • the wrapper circumscribing the rod of aerosol-generating substrate may be a paper wrapper or a non-paper wrapper.
  • Suitable paper wrappers for use in specific embodiments of the invention are known in the art and include, but are not limited to: cigarette papers; and filter plug wraps.
  • Suitable non-paper wrappers for use in specific embodiments of the invention are known in the art and include, but are not limited to sheets of homogenised tobacco materials.
  • a paper layer of the co-laminated sheet may have a grammage of at least 35 gsm, preferably at least 40 gsm.
  • the paper layer of the co-laminated sheet may have a grammage of less than or equal to 55 gsm, preferably less than or equal to 50 gsm.
  • the paper layer of the co-laminated sheet may have a grammage from 35 gsm to 55 gsm, preferably from 40 gsm to 50 gsm. In a preferred embodiment, the paper layer of the co-laminated sheet may have a grammage of 45 gsm.
  • a metallic layer of the co-laminated sheet may have a thickness of at least 2 micrometres, preferably at least 3 micrometres, more preferably at least 5 micrometres.
  • the metallic layer of the co-laminated sheet may have a thickness of less than or equal to 15 micrometres, preferably less than or equal to 12 micrometres, more preferably less than or equal to 10 micrometres.
  • the metallic layer of the co-laminated sheet may have a thickness from 2 micrometres to 15 micrometres, preferably from 3 micrometres to 12 micrometres, more preferably from 5 micrometres to 10 micrometres. In a preferred embodiment, the metallic layer of the co-laminated sheet may have a thickness of 6 microns.
  • the PVOH or silicone (or polysiloxane) may be applied to the paper layer as a surface coating, such as disposed on an exterior surface of the paper layer of the wrapper circumscribing the rod of aerosol-generating substrate.
  • the PVOH or silicone (or polysiloxane) may be disposed on and form a layer on the exterior surface of the paper layer of the wrapper.
  • the PVOH or silicone (or polysiloxane) may be disposed on an interior surface of the paper layer of the wrapper.
  • the PVOH or silicone (or polysiloxane) may be disposed on and form a layer on the interior surface of the paper layer of the aerosol generating article.
  • the PVOH or silicone (or polysiloxane) may be disposed on the interior surface and the exterior surface of the paper layer of the wrapper.
  • the PVOH or silicone (or polysiloxane) may be disposed on and form a layer on the interior surface and the exterior surface of the paper layer of the wrapper.
  • the wrapper circumscribing the rod of aerosol-generating substrate may comprise a flame retardant composition comprising one or more flame retardant compounds.
  • flame retardant compounds is used herein to describe chemical compounds that, when added to or otherwise incorporated into a carrier substrate, such as paper or plastic compounds, provide the carrier substrate with varying degrees of flammability protection. In practice, flame retardant compounds may be activated by the presence of an ignition source and are adapted to prevent or slow the further development of ignition by a variety of different physical and chemical mechanisms.
  • a flame retardant composition may typically further comprise one of more non-flame retardant compounds, that is, one or more compound—such as a solvent, an excipient, a filler—that does not actively contribute to providing the carrier substrate with flammability protection, but is used to facilitate the application of the flame retardant compound or compounds onto or into the wrapper or both.
  • the flame retardant composition may comprise a polymer and a mixed salt based on at least one mono, di- and/or tri-carboxylic acid, at least one polyphosphoric, pyrophosphoric and/or phosphoric acid, and a hydroxide or a salt of an alkali or an alkaline earth metal, where the at least one mono, di- and/or tri-carboxylic acid and the hydroxide or salt form a carboxylate and the at least one polyphosphoric, pyrophosphoric and/or phosphoric acid and the hydroxide or salt form a phosphate.
  • the flame retardant composition may further comprise a carbonate of an alkali or an alkaline earth metal.
  • the flame retardant composition may comprise cellulose modified with at least one C 10 or higher fatty acid, tall oil fatty acid (TOFA), phosphorylated linseed oil, phosphorylated downstream corn oil.
  • the at least one C 10 or higher fatty acid is selected from the group consisting of capric acid, myristic acid, palmitic acid, and combinations thereof.
  • the flame retardant composition may be provided in a treated portion of the wrapper. This means that the flame retardant composition has been applied onto or into a corresponding portion of a wrapping base material of the wrapper or both.
  • the wrapper has an overall dry basis weight that is greater than the dry basis weight of the wrapping base material.
  • the wrapper comprising a flame retardant composition may have a grammage of at least 20 gsm, preferably at least 25 gsm, more preferably at least 30 gsm.
  • the wrapper comprising a flame retardant composition may have a grammage of less than or equal to 45 gsm, preferably less than or equal to 40 gsm, more preferably less than or equal to 35 gsm.
  • the wrapper comprising a flame retardant composition may have a grammage from 20 gsm to 45 gsm, preferably from 25 gsm to 40 gsm, more preferably from 30 gsm to 35 gsm.
  • the wrapper comprising a flame retardant composition may have a grammage of 33 gsm.
  • Aerosol-generating articles according to the present disclosure may further comprise an upstream section located upstream of the rod of aerosol-generating substrate.
  • the upstream section is preferably located immediately upstream of the rod of aerosol-generating substrate.
  • the upstream section preferably extends between the upstream end of the aerosol-generating article and the rod of aerosol-generating substrate.
  • the upstream section may comprise one or more upstream elements located upstream of the rod of aerosol-generating substrate. Such one or more upstream elements are described within the present disclosure.
  • the upstream section or element thereof may additionally help to prevent the loss of loose particles of tobacco from the upstream end of the article. This may be particularly important when the shredded tobacco has a relatively low density, for example.
  • the upstream section, or upstream element thereof, may also additionally provide a degree of protection to the aerosol-generating substrate during storage, as it covers at least to some extent the upstream end of the aerosol-generating substrate, which may otherwise be exposed.
  • An upstream element may be made of a porous material or may comprise a plurality of openings. This may, for example, be achieved through laser perforation. Preferably, the plurality of openings is distributed homogeneously over the cross-section of the upstream element.
  • the upstream section, or an upstream element thereof has an external diameter that is approximately equal to the external diameter of the aerosol-generating article.
  • the external diameter of the upstream section, or an upstream element thereof is between 5 millimetres and 8 millimetres, more preferably between 5.25 millimetres and 7.5 millimetres, more preferably between 5.5 millimetres and 7 millimetres.
  • the length of the upstream section, or an upstream element thereof can be used to control the position of the aerosol-generating article within the cavity of an aerosol-generating device, for articles which are intended to be externally heated. This can advantageously ensure that the position of the aerosol-generating substrate within the cavity can be optimised for heating and the position of any ventilation can also be optimised.
  • a length of the downstream section may be less than 75 millimetres.
  • a length of the downstream section may be equal to or less than 70 millimetres.
  • a length of the downstream section may be equal to or less than 65 millimetres.
  • a ratio between a length of the downstream section and a length of the upstream section may be at least 4.
  • a ratio between a length of the downstream section and a length of the upstream section may be at least 5.
  • a ratio between a length of the downstream section and a length of the upstream section may be at least 6.
  • a ratio between a length of the downstream section and a length of the upstream section may be at least 7.
  • the hollow tubular cooling element may be provided immediately downstream of the rod of aerosol-generating substrate. In other words, the hollow tubular cooling element may abut a downstream end of the rod of aerosol-generating substrate.
  • the hollow tubular cooling element may be provided upstream of the downstream filter segment.
  • the hollow tubular cooling element may define an upstream end of the downstream section of the aerosol-generating article.
  • the downstream end of the aerosol-generating article may coincide with the downstream end of the downstream section.
  • the downstream section of the aerosol-generating article comprises a single hollow tubular element. In other words, the downstream section of the aerosol-generating article may comprise only one hollow tubular element. In other embodiments, the downstream section comprises two or more hollow tubular elements, as described below.
  • the term “hollow tubular element” denotes a generally elongate element defining a lumen or airflow passage 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 one airflow conduit establishing an uninterrupted fluid communication between an upstream end of the tubular element and a downstream end of the tubular element.
  • the hollow tubular cooling element may be an individual, discrete element of the aerosol-generating article which has a defined length and thickness.
  • An internal volume defined by the hollow tubular cooling element may be at least 100 cubic millimetres.
  • a volume of the cavity or lumen defined by the hollow tubular cooling element may be at least 100 cubic millimetres.
  • an internal volume defined by the hollow tubular cooling element may be at least 300 cubic millimetres.
  • An internal volume defined by the hollow tubular cooling element may be at least 700 cubic millimetres.
  • An internal volume defined by the hollow tubular cooling element may be less than or equal to 1200 cubic millimetres. Preferably, an internal volume defined by the hollow tubular cooling element may be less than or equal to 1000 cubic millimetres. An internal volume defined by the hollow tubular cooling element may be less than or equal to 900 cubic millimetres.
  • An internal volume defined by the hollow tubular cooling element may be between 100 and 1200 cubic millimetres. Preferably, an internal volume defined by the hollow tubular cooling element may be between 300 and 1000 cubic millimetres. An internal volume defined by the hollow tubular cooling element may be between 700 and 900 cubic millimetres.
  • the RTD of a hollow tubular cooling element may be at least 0 millimetres H 2 O, or at least 0.25 millimetres H 2 O or at least 0.5 millimetres H 2 O or at least 1 millimetre H 2 O.
  • the RTD of a hollow tubular cooling element is from 0 millimetre H 2 O to 10 millimetres H 2 O, preferably from 0.25 millimetres H 2 O to 10 millimetres H 2 O, preferably from 0.5 millimetres H 2 O to 10 millimetres H 2 O. In other embodiments, the RTD of a hollow tubular cooling element is from 0 millimetres H 2 O to 5 millimetres H 2 O, preferably from 0.25 millimetres H 2 O to 5 millimetres H 2 O preferably from 0.5 millimetres H 2 O to 5 millimetres H 2 O.
  • the overall RTD of the article depends essentially on the RTD of the rod and optionally on the RTD of the downstream and/or upstream elements. This is because the hollow tubular cooling element is substantially empty and, as such, substantially only marginally contribute to the overall RTD of the aerosol-generating article.
  • the flow channel should therefore be free from any components that would obstruct the flow of air in a longitudinal direction.
  • the flow channel is substantially empty and particularly preferably the flow channel is empty.
  • the aerosol-generating article may comprise a ventilation zone at a location along the downstream section.
  • the aerosol-generating article may comprise a ventilation zone at a location along the hollow tubular cooling element.
  • ventilation zone may extend through the peripheral wall of the hollow tubular cooling element. As such, fluid communication is established between the flow channel internally defined by the hollow tubular cooling element and the outer environment. The ventilation zone is further described within the present disclosure.
  • the length of the hollow tubular cooling element is at least 10 millimetres.
  • the length of the hollow tubular cooling element is at least 20 millimetres. More preferably, the length of the hollow tubular cooling element is at least 30 millimetres.
  • the length of the hollow tubular cooling element may be at least 40 millimetres. More preferably, the length of the hollow tubular cooling element is at least 45 millimetres.
  • the length of the hollow tubular cooling element is preferably less than 60 millimetres. More preferably, the length of the hollow tubular cooling element is less than 55 millimetres. More preferably, the length of the hollow tubular cooling element is less than 50 millimetres.
  • a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is preferably at least 1.0. More preferably, a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is at least 1.25. More preferably, a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is at least 1.5. More preferably, a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is at least 1.75.
  • a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is preferably less than 3.5.
  • a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is less than 3.25. More preferably, a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is less than 3.0. Even more preferably, a ratio between the length of the hollow tubular cooling element and the length of the rod of aerosol-generating substrate is less than 2.75.
  • a hollow tubular cooling element having an internal diameter as set out above may advantageously reduce the resistance to draw of the hollow tubular cooling element.
  • the ratio between an internal diameter of the hollow tubular cooling element and the external diameter of the hollow tubular cooling element may be no more than 0.99.
  • the ratio between an internal diameter of the hollow tubular cooling element and the external diameter of the hollow tubular cooling element may be no more than 0.98.
  • the lumen or cavity of the hollow tubular cooling element may have any cross sectional shape.
  • the lumen of the hollow tubular cooling element may have a circular cross sectional shape.
  • the hollow tubular cooling element may be paper tube.
  • the hollow tubular cooling element may be a tube formed from spirally wound paper.
  • the hollow tubular cooling element may be formed from a plurality of layers of the paper.
  • the paper may have a basis weight of at least 50 grams per square meter, at least 60 grams per square meter, at least 70 grams per square meter, or at least 90 grams per square meter.
  • the hollow tubular cooling element may comprise a polymeric material.
  • the hollow tubular cooling element may comprise a polymeric film.
  • the polymeric film may comprise a cellulosic film.
  • the hollow tubular cooling element may comprise low density polyethylene (LDPE) or polyhydroxyalkanoate (PHA) fibres.
  • the hollow tube may comprise cellulose acetate tow.
  • the hollow tubular cooling element comprises cellulose acetate tow
  • the cellulose acetate tow may have a denier per filament of between 2 and 4 and a total denier of between 25 and 40.
  • a distance between the ventilation zone and an upstream end of the upstream element may be less than or equal to 34 millimetres.
  • a distance between the ventilation zone and an upstream end of the upstream element is less than or equal to 33 millimetres. More preferably, a distance between the ventilation zone and an upstream end of the upstream element is less than or equal to 31 millimetres.
  • a distance between the ventilation zone and an upstream end of the upstream element is from 25 millimetres to 31 millimetres, preferably from 26 millimetres to 31 millimetres, more preferably from 27 millimetres to 31 millimetres.
  • a distance between the ventilation zone and an upstream end of the upstream element is from 28 millimetres to 30 millimetres.
  • Aerosol-generating articles comprising a ventilation zone at a location along the hollow tubular cooling element at a distance from an upstream end of the upstream element falling within the ranges described above have been found to present multiple benefits.
  • the intense cooling caused by the ambient air drawn into the cavity of the hollow tubular cooling element at the ventilation zone is understood to accelerate the condensation of droplets of aerosol former (for example, glycerin) that has been released from the aerosol-generating substrate upon heating.
  • aerosol former for example, glycerin
  • volatilised nicotine and organic acids similarly released from the tobacco substrate accumulate onto the newly formed droplets of aerosol former, and subsequently combine into nicotine salts. Accordingly, the overall proportion of the aerosol particulate phase to the aerosol gas phase may be enhanced compared with existing aerosol-generating articles.
  • Positioning the ventilation zone at a distance from an upstream end of the upstream element as described above advantageously reduces the fly time of the volatilised nicotine before the volatilised nicotine particles reach the droplets of aerosol former.
  • one such positioning of the ventilation zone relative to an upstream end of the upstream element ensures there are enough time and room for the accumulation of nicotine and formation of nicotine salts to occur in a significant proportion before the flow of aerosol reaches the consumer's mouth.
  • the ventilation zone may typically comprise a plurality of perforations through the peripheral wall of the hollow tubular cooling element.
  • the ventilation zone comprises at least one circumferential row of perforations.
  • the ventilation zone may comprise two circumferential rows of perforations.
  • the perforations may be formed online during manufacturing of the aerosol-generating article.
  • each circumferential row of perforations comprises from 8 to 30 perforations.
  • An aerosol-generating article in accordance with the present invention may have a ventilation level of at least 2 percent.
  • ventilation level is used throughout the present specification to denote a volume ratio between of the airflow admitted into the aerosol-generating article via the ventilation zone (ventilation airflow) and the sum of the aerosol airflow and the ventilation airflow. The greater the ventilation level, the higher the dilution of the aerosol flow delivered to the consumer.
  • the aerosol-generating article preferably has a ventilation level of at least 5 percent, more preferably at least 10 percent, even more preferably at least 12 percent or at least 15 percent.
  • the aerosol-generating article has a ventilation level from 10 percent to 30 percent, preferably from 12 percent to 30 percent, more preferably from 15 percent to 30 percent. In other embodiments, the aerosol-generating article has a ventilation level from 10 percent to 25 percent, preferably from 12 percent to 25 percent, more preferably from 15 percent to 25 percent. In further embodiments, the aerosol-generating article has a ventilation level from 10 percent to 20 percent, preferably from 12 percent to 20 percent, more preferably from 15 percent to 20 percent. In particularly preferred embodiments, the aerosol-generating article has a ventilation level from 10 percent to 18 percent, preferably from 12 percent to 18 percent, more preferably from 15 percent to 18 percent.
  • the rapid cooling induced by the admission of external air into the hollow tubular cooling element via the ventilation zone can be favourably used to favour nucleation and growth of aerosol droplets.
  • the admission of external air into the hollow tubular cooling element has the immediate drawback of diluting the aerosol stream delivered to the consumer.
  • Ventilation levels between 10 percent and 20 percent, and even more preferably between 12 and 18 percent, have been found to lead to particularly satisfactory values of glycerol delivery.
  • a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is preferably less than 17 millimetres. More preferably, a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is less than 16 millimetres. Even more preferably, a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is less than 16 millimetres. In particularly preferred embodiments, a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is less than 15 millimetres.
  • a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is from 4 millimetres to 17 millimetres, preferably from 7 millimetres to 17 millimetres, more preferably from 10 millimetres to 17 millimetres. In other embodiments, a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is from 8 millimetres to 16 millimetres, preferably from 9 millimetres to 16 millimetres, more preferably from 10 millimetres to 16 millimetres.
  • a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate is from 8 millimetres to 15 millimetres, preferably from 9 millimetres to 15 millimetres, more preferably from 10 millimetres to 15 millimetres.
  • a distance between the ventilation zone and a downstream end of the rod of aerosol-generating substrate may be from 10 millimetres to 14 millimetres, preferably from 10 millimetres to 13 millimetres, more preferably from 10 millimetres to 12 millimetres.
  • Positioning the ventilation zone at a distance from a downstream end of the rod of aerosol-generating substrate within the ranges described above has the benefit of generally ensuring that, during use, the ventilation zone is just outside of the heating device when the aerosol-generating article is inserted in the heating device while reducing the risk of the ventilation zone being inadvertently obstructed by a user's lips or hands. Additionally, it has been found that positioning the ventilation zone at a distance from a downstream end of the rod of aerosol-generating substrate within the ranges described above may advantageously enhance nucleation and aerosol formation and delivery.
  • a distance between the ventilation zone and a downstream end of the hollow tubular cooling element may be at least 3 millimetres. Preferably, a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is at least 5 millimetres. More preferably, a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is at least 7 millimetres.
  • a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is preferably less than or equal to 14 millimetres. More preferably, a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is less than or equal to 12 millimetres. Even more preferably, a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is less than or equal to 10 millimetres.
  • a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is from 3 millimetres to 14 millimetres, preferably from 5 millimetres to 14 millimetres, more preferably from 7 millimetres to 14 millimetres. In further embodiments, a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is from 3 millimetres to 12 millimetres, preferably from 5 millimetres to 12 millimetres, more preferably from 7 millimetres to 12 millimetres.
  • a distance between the ventilation zone and a downstream end of the hollow tubular cooling element is from 3 millimetres to 10 millimetres, preferably from 5 millimetres to 10 millimetres, more preferably from 7 millimetres to 10 millimetres.
  • Positioning the ventilation zone at a distance from a downstream end of the hollow tubular cooling element within the ranges described above has the benefit of generally ensuring that, during use, the ventilation zone is just outside of the heating device when the aerosol-generating article is inserted in the heating device while reducing the risk of the ventilation zone being inadvertently obstructed by a user's lips or hands. Additionally, it has been found that positioning the ventilation zone at a distance from a downstream end of the hollow tubular cooling element within the ranges described above may advantageously lead to the formation and delivery of a comparatively more homogenous aerosol.
  • a distance between the ventilation zone and a downstream end of the aerosol-generating article may be at least 10 millimetres. Preferably, a distance between the ventilation zone and a downstream end of the aerosol-generating article is at least 12 millimetres. More preferably, a distance between the ventilation zone and a downstream end of the aerosol-generating article is at least 15 millimetres.
  • a distance between the ventilation zone and a downstream end of the aerosol-generating article is preferably less than or equal to 21 millimetres. More preferably, a distance between the ventilation zone and a downstream end of the aerosol-generating article is less than or equal to 19 millimetres. Even more preferably, a distance between the ventilation zone and a downstream end of the aerosol-generating article is less than or equal to 17 millimetres.
  • a distance between the ventilation zone and a downstream end of the aerosol-generating article is from 10 millimetres to 21 millimetres, preferably from 12 millimetres to 21 millimetres, more preferably from 15 millimetres to 21 millimetres. In further embodiments, a distance between the ventilation zone and a downstream end of the aerosol-generating article is from 10 millimetres to 19 millimetres, preferably from 12 millimetres to 19 millimetres, more preferably from 15 millimetres to 19 millimetres.
  • a distance between the ventilation zone and a downstream end of the aerosol-generating article is from 10 millimetres to 17 millimetres, preferably from 12 millimetres to 17 millimetres, more preferably from 15 millimetres to 17 millimetres.
  • Positioning the ventilation zone at a distance from a downstream end of the aerosol-generating article within the ranges described above has the benefit of generally ensuring that, during use, when the aerosol-generating article is partially received within the heating device, a portion of the aerosol-generating article extending outside of the heating device is long enough for the consumer to comfortably hold the article between their lips while reducing the risk of the ventilation zone being inadvertently obstructed by a user's lips or hands.
  • the downstream section may comprise a downstream filter segment.
  • the downstream filter segment may extend to a downstream end of the downstream section.
  • the downstream filter segment may be located at the downstream end of the aerosol-generating article.
  • the downstream end of the downstream filter segment may define the downstream end of the aerosol-generating article.
  • the downstream filter segment may be located downstream of a hollow tubular cooling element, which is described above.
  • the downstream filter segment may extend between the hollow tubular cooling element and the downstream end of the aerosol-generating article.
  • 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 aerosol-generating substrate. 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 section includes a single downstream filter segment.
  • the downstream section includes two or more downstream filter segments axially aligned in an abutting end to end relationship with each other.
  • 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 is circumscribed by a plug wrap.
  • the downstream filter segment is unventilated such that air does not enter the aerosol-generating article along the downstream filter segment.
  • the downstream filter segment is preferably connected to one or more of the adjacent upstream components of the aerosol-generating article by means of a tipping wrapper.
  • the downstream filter segment preferably has an external diameter that is approximately equal to the external diameter of the aerosol-generating article.
  • the diameter of a downstream filter segment may be substantially the same as the outer diameter of the hollow tubular cooling element.
  • the outer diameter of the downstream filter segment may be between 5 millimetres and 10 millimetres.
  • the diameter of the downstream filter segment may be between 5.5 millimetres and 9 millimetres.
  • the diameter of the downstream filter segment may be between 6 millimetres and 8 millimetres. In preferred embodiments, the diameter of the downstream filter segment is less than 7 millimetres.
  • the resistance to draw (RTD) of a component or the aerosol-generating 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 section may be at least 0 millimetres H 2 O.
  • the RTD of the downstream section may be at least 3 millimetres H 2 O.
  • the RTD of the downstream section may be at least 6 millimetres H 2 O.
  • the RTD of the downstream section may be no greater than 12 millimetres H 2 O.
  • the RTD of the downstream section may be no greater than 11 millimetres H 2 O.
  • the RTD of the downstream section may be no greater than 10 millimetres H 2 O.
  • the resistance to draw of the downstream section may be greater than or equal to 0 millimetres H 2 O and less than 12 millimetres H 2 O.
  • the resistance to draw of the downstream section may be greater than or equal to 3 millimetres H 2 O and less than 12 millimetres H 2 O.
  • the resistance to draw of the downstream section may be greater than or equal to 0 millimetres H 2 O and less than 11 millimetres H 2 O.
  • the resistance to draw of the downstream section may be greater than or equal to 3 millimetres H 2 O and less than 11 millimetres H 2 O.
  • the resistance to draw of the downstream section may be greater than or equal to 6 millimetres H 2 O and less than 10 millimetres H 2 O.
  • the resistance to draw of the downstream section may be 8 millimetres H 2 O.
  • the resistance to draw (RTD) of the downstream filter segment may be at least 0 millimetres H 2 O.
  • the RTD of the downstream filter segment may be at least 3 millimetres H 2 O.
  • the RTD of the downstream filter segment may be at least 6 millimetres H 2 O.
  • the RTD of the downstream filter segment may be no greater than 12 millimetres H 2 O.
  • the RTD of the downstream filter segment may be no greater than 11 millimetres H 2 O.
  • the RTD of the downstream filter segment may be no greater than 10 millimetres H 2 O.
  • the resistance to draw of the downstream filter segment may be greater than or equal to 6 millimetres H 2 O and less than 10 millimetres H 2 O.
  • the resistance to draw of the downstream filter segment may be 8 millimetres H 2 O.
  • the ventilation zone downstream of the filter segment may comprise a plurality of perforations.
  • the ventilation zone downstream of the filter segment comprises at least one circumferential row of perforations.
  • the ventilation zone downstream of the filter segment may comprise two circumferential rows of perforations.
  • the perforations may be formed online during manufacturing of the aerosol-generating article.
  • each circumferential row of perforations comprises from 8 to 30 perforations.
  • the downstream section may further comprise one or more additional hollow tubular elements.
  • the hollow tubular support element may be formed from any suitable material or combination of materials.
  • the support element may be formed from one or more materials selected from the group consisting of: cellulose acetate; cardboard; crimped paper, such as crimped heat resistant paper or crimped parchment paper; and polymeric materials, such as low density polyethylene (LDPE).
  • LDPE low density polyethylene
  • the support element is formed from cellulose acetate.
  • Other suitable materials include polyhydroxyalkanoate (PHA) fibres.
  • the hollow tubular support element comprises a hollow acetate tube.
  • the flow channel of the downstream hollow tubular element should therefore be free from any components that would obstruct the flow of air in a longitudinal direction.
  • the flow channel is substantially empty and particularly preferably the flow channel is empty.
  • the length of the downstream hollow tubular element is at least 3 millimetres. More preferably, the length of the downstream hollow tubular element is at least 4 millimetres. The length of the downstream hollow tubular element may be at least 5 millimetres. More preferably, the length of the downstream hollow tubular element is at least 6 millimetres.
  • the length of the downstream hollow tubular element is preferably less than 20 millimetres. More preferably, the length of the downstream hollow tubular element is less than 15 millimetres. More preferably, the length of the downstream hollow tubular element is less than 12 millimetres. More preferably, the length of the downstream hollow tubular element is less than 10 millimetres.
  • the length of the downstream hollow tubular element may be between 3 millimetres and 20 millimetres, or between 4 millimetres and 20 millimetres, or between 5 millimetres and 20 millimetres, or between 6 millimetres and 20 millimetres. In other embodiments, the length of the downstream hollow tubular element may be between 3 millimetres and 15 millimetres, or between 4 millimetres and 15 millimetres, or between 5 millimetres and 15 millimetres, or between 6 millimetres and 15 millimetres.
  • the length of the downstream hollow tubular element may be between 3 millimetres and 12 millimetres, or between 4 millimetres and 12 millimetres, or between 5 millimetres and 12 millimetres, or between 6 millimetres and 12 millimetres. In other embodiments, the length of the downstream hollow tubular element may be between 3 millimetres and 10 millimetres, or between 4 millimetres and 10 millimetres, or between 5 millimetres and 10 millimetres, or between 6 millimetres and 10 millimetres.
  • the combined length of the hollow tubular cooling element and the downstream hollow tubular element (or elements) is preferably at least 20 millimetres. This corresponds to the sum of the length of the hollow tubular cooling element and the length of the downstream hollow tubular element (or elements), not taking into account the length of any components provided in between. More preferably, the combined length is at least 30 millimetres. The combined length may be at least 40 millimetres. More preferably, the combined length is at least 45 millimetres.
  • the combined length of the hollow tubular cooling element and the downstream hollow tubular element (or elements) is preferably less than 60 millimetres. More preferably, the combined length is less than 55 millimetres. More preferably, the combined length is less than 50 millimetres.
  • the combined length of the hollow tubular cooling element and the downstream hollow tubular element may be between 20 millimetres and 60 millimetres, or between 30 millimetres and 60 millimetres, or between 40 millimetres and 60 millimetres, or between 45 millimetres and 60 millimetres.
  • the combined length may be between 20 millimetres and 55 millimetres, or between 30 millimetres and 55 millimetres, or between 40 millimetres and 55 millimetres, or between 45 millimetres and 55 millimetres.
  • the combined length may be between 20 millimetres and 50 millimetres, or between 30 millimetres and 50 millimetres, or between 40 millimetres and 50 millimetres, or between 45 millimetres and 50 millimetres.
  • the overall length of the hollow tubular elements in the downstream section is relatively long, with the benefits as set out above in relation to the length of the hollow tubular cooling element.
  • the lumen or cavity of the downstream hollow tubular element may have any cross sectional shape.
  • the lumen of the downstream hollow tubular element may have a circular cross sectional shape.
  • the downstream hollow tubular element may comprise a paper-based material.
  • the downstream hollow tubular element 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.
  • the downstream hollow tubular element may comprise cardboard.
  • the downstream hollow tubular element may be a cardboard tube.
  • the downstream hollow tubular element may be a paper tube.
  • the downstream hollow tubular element may be a tube formed from spirally wound paper.
  • the downstream hollow tubular element may be formed from a plurality of layers of the paper.
  • the paper may have a basis weight of at least 50 grams per square meter, at least 60 grams per square meter, at least 70 grams per square meter, or at least 90 grams per square meter.
  • the downstream hollow tubular element may comprise a polymeric material.
  • the downstream hollow tubular element may comprise a polymeric film.
  • the polymeric film may comprise a cellulosic film.
  • the downstream hollow tubular element may comprise low density polyethylene (LDPE) or polyhydroxyalkanoate (PHA) fibres.
  • LDPE low density polyethylene
  • PHA polyhydroxyalkanoate
  • the downstream hollow tubular element comprises cellulose acetate tow.
  • the downstream hollow tubular element comprises a hollow acetate tube.
  • the downstream hollow tubular element comprises cellulose acetate tow
  • the cellulose acetate tow may have a denier per filament of between 2 and 4 and a total denier of between 25 and 40.
  • the thickness of a peripheral wall (in other words, the wall thickness) of the downstream hollow tubular element may be at least 0.1 millimetres.
  • the wall thickness of the downstream hollow tubular element may be at least 0.15 millimetres.
  • the wall thickness of the downstream hollow tubular element may be at least 0.2 millimetres, preferably at least 0.25 millimetres, preferably at least 0.3 millimetres, preferably at least 0.4 millimetres, preferably at least 0.5 millimetres, preferably at least 0.75 millimetres, or preferably at least 1 millimetre.
  • the wall thickness of the downstream hollow tubular element may be less than or equal to 2 millimetres, preferably less than or equal to 1.5 millimetres and even more preferably less than or equal to 1.25 millimetres.
  • the wall thickness of the downstream hollow tubular element may be less than or equal to 1 millimetre.
  • the wall thickness of the downstream hollow tubular element may be less than or equal to 0.75 millimetres.
  • the wall thickness of the downstream hollow tubular element may be less than or equal to 0.5 millimetres.
  • the wall thickness of the downstream hollow tubular element may be between 0.1 millimetres and 2 millimetres, preferably between 0.15 millimetres and 1.5 millimetres, more preferably between 0.2 millimetres and 1.25 millimetres, more preferably between 0.3 millimetres and 1 millimetres, more preferably between 0.3 millimetres and 0.75 millimetres, between 0.4 millimetres and 1 millimetres, more preferably between 0.4 millimetres and 0.75 millimetres, more preferably between 0.5 millimetres and 1 millimetre, even more preferably between 0.5 millimetres and 0.75 millimetres.
  • the downstream section further comprises an additional downstream hollow tubular element, as described above, the additional downstream hollow tubular element may be formed of the same material as the downstream hollow tubular element, or a different material.
  • the downstream section may comprise a ventilation zone at a location on the downstream hollow tubular element.
  • this ventilation zone at a location on the downstream hollow tubular element may be provided instead of a ventilation zone at a location on the hollow tubular cooling element.
  • the ventilation zone at a location on the downstream hollow tubular element may be provided in addition to the ventilation zone provided at a location on the hollow tubular cooling element.
  • the ventilation zone at a location along the downstream hollow tubular element may comprise a plurality of perforations through the peripheral wall of the downstream hollow tubular element.
  • the ventilation zone at a location along the downstream hollow tubular element comprises at least one circumferential row of perforations.
  • the ventilation zone may comprise two circumferential rows of perforations.
  • the perforations may be formed online during manufacturing of the aerosol-generating article.
  • each circumferential row of perforations comprises from 8 to 30 perforations.
  • the wall thickness of the downstream hollow tubular element at the ventilation zone may be less than or equal to 2 millimetres, preferably less than or equal to 1.5 millimetres and even more preferably less than or equal to 1.25 millimetres.
  • the wall thickness of the downstream hollow tubular element at the ventilation zone may be less than or equal to 1 millimetre.
  • the wall thickness of the downstream hollow tubular element at the ventilation zone may be less than or equal to 0.75 millimetres.
  • the wall thickness of the downstream hollow tubular element at the ventilation zone may be less than or equal to 0.5 millimetres.
  • the wall thickness of the downstream hollow tubular element at the ventilation zone may between 0.1 millimetres and 2 millimetres, preferably between 0.15 millimetres and 1.5 millimetres, more preferably between 0.2 millimetres and 1.25 millimetres, more preferably between 0.3 millimetres and 1 millimetres, more preferably between 0.3 millimetres and 0.75 millimetres, between 0.4 millimetres and 1 millimetres, more preferably between 0.4 millimetres and 0.75 millimetres, more preferably between 0.5 millimetres and 1 millimetre, even more preferably between 0.5 millimetres and 0.75 millimetres.
  • a distance between the ventilation zone and an upstream end of the downstream hollow tubular element may be at least 1 millimetre.
  • a distance between the ventilation zone and an upstream end of the downstream hollow tubular element may be at least 2 millimetres.
  • a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is at least 3 millimetres.
  • a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is preferably less than or equal to 10 millimetres. More preferably, a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is less than or equal to 7 millimetres. Even more preferably, a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is less than or equal to 5 millimetres.
  • a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is from 1 millimetre to 10 millimetres, preferably from 1 millimetre to 7 millimetres, more preferably from 1 millimetres to 5 millimetres. In further embodiments, a distance between the ventilation zone and an upstream end of the downstream hollow tubular element is from 2 millimetres to 10 millimetres, preferably from 2 millimetres to 7 millimetres, more preferably from 2 millimetres to 5 millimetres.
  • the term ‘crimped’ denotes a sheet having a plurality of substantially parallel ridges or corrugations.
  • the substantially parallel ridges or corrugations extend in a longitudinal direction with respect to the rod.
  • the terms ‘gathered’, ‘pleated’, or ‘folded’ denote that a sheet of material is convoluted, folded, or otherwise compressed or constricted substantially transversely to the cylindrical axis of the rod.
  • a sheet may be crimped prior to being gathered, pleated or folded.
  • a sheet may be gathered, pleated or folded without prior crimping.
  • An overall length of an aerosol-generating article in accordance with the invention is preferably less than or equal to 90 millimetres. More preferably, an overall length of an aerosol-generating article in accordance with the invention is preferably less than or equal to 85 millimetres. Even more preferably, an overall length of an aerosol-generating article in accordance with the invention is preferably less than or equal to 80 millimetres.
  • an overall length of the aerosol-generating article is preferably from 50 millimetres to 90 millimetres, more preferably from 60 millimetres to 90 millimetres, even more preferably from 70 millimetres to 90 millimetres. In other embodiments, an overall length of the aerosol-generating article is preferably from 50 millimetres to 85 millimetres, more preferably from 60 millimetres to 85 millimetres, even more preferably from 70 millimetres to 85 millimetres. In further embodiments, an overall length of the aerosol-generating article is preferably from 50 millimetres to 80 millimetres, more preferably from 60 millimetres to 80 millimetres, even more preferably from 70 millimetres to 80 millimetres. In an exemplary embodiment, an overall length of the aerosol-generating article is 75 millimetres.
  • the aerosol-generating article has an external diameter of at least 5.5 millimetres along the full length of the article. More preferably, the aerosol-generating article has an external diameter of at least 6 millimetres along the full length of the article.
  • the aerosol-generating article has a maximum external diameter of less than 10 millimetres. This means that if the diameter of the aerosol-generating article varies along the length of the article, the diameter at all locations along the length is less than 10 millimetres. More preferably, the aerosol-generating article has a maximum external diameter of less than 9 millimetres. Even more preferably, the aerosol-generating article has a maximum external diameter of less than 8 millimetres. Even more preferably, the aerosol-generating article has a maximum external diameter of less than 7 millimetres.
  • the aerosol-generating article has an external diameter from 5 millimetres to 10 millimetres, preferably from 5.5 millimetres to 10 millimetres, more preferably from 6 millimetres to 10 millimetres. In other embodiments, the aerosol-generating article has an external diameter from 5 millimetres to 9 millimetres, preferably from 5.5 millimetres to 9 millimetres, more preferably from 6 millimetres to 9 millimetres. In further embodiments, the aerosol-generating article has an external diameter from 5 millimetres to 8 millimetres, preferably from 5.5 millimetres to 8 millimetres, more preferably from 6 millimetres to 8 millimetres. In further embodiments, the aerosol-generating article has an external diameter from 5 millimetres to 7 millimetres, preferably from 5.5 millimetres to 7 millimetres, more preferably from 6 millimetres to 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.
  • one or more of the components of the aerosol-generating article are individually circumscribed by their own wrapper.
  • the rod of aerosol-generating substrate and the downstream filter segment are individually wrapped.
  • the upstream element, the rod of aerosol-generating substrate and the hollow tubular element are then combined together with an outer wrapper. Subsequently, they are combined with the downstream filter segment-which has its own wrapper—by means of tipping paper.
  • At least one of the components of the aerosol-generating article is wrapped in a hydrophobic wrapper.
  • hydrophobic refers to a surface exhibiting water repelling properties.
  • the “water contact angle” is the angle, conventionally measured through the liquid, where a liquid/vapour interface meets a solid surface. It quantifies the wettability of a solid surface by a liquid via the Young equation. Hydrophobicity or water contact angle may be determined by utilizing TAPPI T558 test method and the result is presented as an interfacial contact angle and reported in “degrees” and can range from near zero to near 180 degrees.
  • the hydrophobic wrapper is one including a paper layer having a water contact angle of about 30 degrees or greater, and preferably about 35 degrees or greater, or about 40 degrees or greater, or about 45 degrees or greater.
  • the paper layer may comprise PVOH (polyvinyl alcohol) or silicon.
  • PVOH polyvinyl alcohol
  • the PVOH may be applied to the paper layer as a surface coating, or the paper layer may comprise a surface treatment comprising PVOH or silicon.
  • an aerosol-generating article in accordance with the present invention comprises, in linear sequential arrangement, an upstream element, a rod of aerosol-generating substrate located immediately downstream of the upstream element, a hollow tubular cooling element located immediately downstream of the rod of aerosol-generating substrate, a downstream filter segment located immediately downstream of the hollow tubular cooling element, a downstream hollow tubular element located immediately downstream of the downstream filter segment and one or more outer wrappers combining the components.
  • the upstream element defines an upstream section of the aerosol-generating article.
  • the hollow tubular cooling element, the downstream filter segment and the downstream hollow tubular element form a downstream section of the aerosol-generating article.
  • the rod of aerosol-generating substrate may abut the upstream element.
  • the hollow tubular cooling element may abut the rod of aerosol-generating substrate.
  • the downstream filter segment may abut the hollow tubular cooling element.
  • the downstream hollow tubular element may abut the downstream filter segment.
  • the hollow tubular cooling element abuts the rod of aerosol-generating substrate, the downstream filter segment abuts the hollow tubular cooling element and the downstream hollow tubular element abuts the downstream filter segment.
  • the present disclosure also relates to an aerosol-generating system comprising an aerosol-generating device having 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 aerosol-generating substrate 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 “aerosol-generating 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 10 millimetres and 50 millimetres.
  • the length of the device cavity may be between 20 millimetres and 40 millimetres.
  • the length of the device cavity may be between 25 millimetres and 30 millimetres.
  • the length of the device cavity may be the same as or greater than the length of the rod of the aerosol-generating substrate.
  • the length of the device cavity may be the same as or greater than the combined length of the upstream section or element and rod of aerosol-generating substrate.
  • the length of the device cavity is such that at least 75 percent of the length of the rod of aerosol-generating substrate is inserted or received within the device cavity, when the aerosol-generating article is received with the aerosol-generating device. More preferably, the length of the device cavity is such that at least 80 percent of the length of the rod of aerosol-generating substrate is inserted or received within the device cavity, when the aerosol-generating article is received with the aerosol-generating device.
  • the length of the device cavity is such that at least 90 percent of the length of the rod of aerosol-generating substrate is inserted or received within the device cavity, when the aerosol-generating article is received with the aerosol-generating device. This maximises the length of the rod of aerosol-generating substrate along which the aerosol-generating substrate can be heated during use, thereby optimising the generation of aerosol from the aerosol-generating substrate and reducing tobacco waste.
  • the length of the device cavity may be such that the downstream section or a portion thereof is configured to protrude from the device cavity, when the aerosol-generating article received within the device cavity.
  • the length of the device cavity may be such that a portion of the downstream section (such as the hollow tubular cooling element or downstream filter segment) is configured to protrude from the device cavity, when the aerosol-generating article received within the device cavity.
  • the length of the device cavity may be such that a portion of the downstream section (such as the hollow tubular cooling element or downstream filter segment) is configured to be received within the device cavity, when the aerosol-generating article received within the device cavity.
  • At least 30 percent of the length of the hollow tubular element may be inserted or received within the device cavity, when the aerosol-generating article is received within the device. At least 40 percent of the length of the hollow tubular element may be inserted or received within the device cavity, when the aerosol-generating article is received within the device. At least 50 percent of the length of the hollow tubular element may be inserted or received within the device cavity, when the aerosol-generating article is received within the device.
  • Various lengths of the hollow tubular element are described in more detail within the present disclosure.
  • Optimising the amount or length of the article that is inserted into the aerosol-generating device may enhance the article's resistance to inadvertently falling out during use.
  • the substrate may shrink such that its external diameter may have reduced, thereby reducing the extent to which the inserted portion of the article inserted into the device can frictionally engage with the device cavity.
  • the inserted portion of the article, or the portion of the article configured to be received within the device cavity may be the same length as the device cavity.
  • the length of the device cavity may be between 15 millimetres and 80 millimetres. Preferably, the length of the device cavity is between 20 millimetres and 70 millimetres. More preferably, the length of the device cavity is between 25 millimetres and 60 millimetres. More preferably, the length of the device is between 25 millimetres and 50 millimetres.
  • the length of the device cavity may be between 25 millimetres and 29 millimetres. Preferably, the length of the device cavity is between 25 millimetres and 29 millimetres. More preferably, the length of the device cavity is between 26 millimetres and 29 millimetres. Even more preferably, the length of the device cavity is 27 millimetres or 28 millimetres.
  • 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 aerosol-generating article.
  • 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 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 air-flow channel of the aerosol-generating device may extend from an inlet located at the mouth end, or proximal end, of the aerosol-generating device to an outlet located away from mouth end of the device.
  • the air-flow channel may extend along a direction parallel to the longitudinal axis of the aerosol-generating device.
  • the heater may be any suitable type of heater.
  • the heater is an external heater.
  • the heater may externally heat the aerosol-generating article when received within the aerosol-generating device.
  • Such an external heater may circumscribe the aerosol-generating article when inserted in or received within the aerosol-generating device.
  • the heater is arranged to heat the outer surface of the aerosol-generating substrate. In some embodiments, the heater is arranged for insertion into an aerosol-generating substrate when the aerosol-generating substrate is received within the cavity. The heater may be positioned within the device cavity, or heating chamber.
  • 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 heater may comprise at least one resistive heating element.
  • the heater comprises a plurality of resistive heating elements.
  • the resistive heating elements are electrically connected in a parallel arrangement.
  • providing a plurality of resistive heating elements electrically connected in a parallel arrangement may facilitate the delivery of a desired electrical power to the heater while reducing or minimising the voltage required to provide the desired electrical power.
  • reducing or minimising the voltage required to operate the heater may facilitate reducing or minimising the physical size of the power supply.
  • Suitable materials for forming the at least one 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.
  • the at least one 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 at least one 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 (Al 2 O 3 ) or Zirconia (ZrO 2 ).
  • 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 an aerosol-generating substrate. 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 aerosol-generating substrate.
  • 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.
  • susceptor element refers to an element comprising a material that is capable of converting electromagnetic energy into heat. When a susceptor element is located in an alternating electromagnetic field, the susceptor is heated. Heating of the susceptor element may be the result of at least one of hysteresis losses and eddy currents induced in the susceptor, depending on the electrical and magnetic properties of the susceptor material.
  • a susceptor element may be arranged such that, when the aerosol-generating 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 is preferably located in contact with the 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 aerosol-generating device may comprise a plurality of susceptor elements.
  • the susceptor element is preferably arranged to heat the outer surface of the aerosol-generating substrate.
  • the susceptor element may comprise any suitable material.
  • the susceptor element may be formed from any material that can be inductively heated to a temperature sufficient to release volatile compounds from the aerosol-generating substrate.
  • Suitable materials for the elongate susceptor element include graphite, molybdenum, silicon carbide, stainless steels, niobium, aluminium, nickel, nickel containing compounds, titanium, and composites of metallic materials.
  • Some susceptor elements comprise a metal or carbon.
  • the susceptor element may comprise or consist of a ferromagnetic material, for example, ferritic iron, a ferromagnetic alloy, such as ferromagnetic steel or stainless steel, ferromagnetic particles, and ferrite.
  • a suitable susceptor element may be, or comprise, aluminium.
  • the susceptor element preferably comprises more than about 5 percent, preferably more than 20 percent, more preferably more than 50 percent or more than 90 percent of ferromagnetic or paramagnetic materials. Some elongate susceptor elements may be heated to a temperature in excess of 250 degrees Celsius.
  • the susceptor element may comprise a non-metallic core with a metal layer disposed on the non-metallic core.
  • the susceptor element may comprise metallic tracks formed on an outer surface of a ceramic core or substrate.
  • the aerosol-generating device may comprise at least one resistive heating element and at least one inductive heating element. In some embodiments the aerosol-generating device may comprise a combination of resistive heating elements and inductive heating elements.
  • the heater may be controlled 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 operating temperature range of the heater may be between about 150 degrees Celsius and about 200 degrees Celsius. More preferably, the operating temperature range of the heater may be between about 180 degrees Celsius and about 200 degrees Celsius.
  • optimal and consistent aerosol delivery may be achieved when using an aerosol-generating device having an external heater, which has an operating temperature range between about 180 degrees Celsius and about 200 degrees Celsius, with aerosol-generating articles having a relatively low RTD (for example, with a downstream section RTD of less than 15 millimetres H 2 O), as mentioned in the present disclosure.
  • the ventilation zone may be arranged to be exposed when the aerosol-generating article is received within the device cavity.
  • the length of the device cavity or heating chamber may be less than the distance of the upstream end of the aerosol-generating article to a ventilation zone located along the downstream section.
  • the distance between the ventilation zone and the upstream end of the upstream element may be greater than the length of the heating chamber.
  • the ventilation zone When the article is received within the device cavity, the ventilation zone may be located at least 0.5 millimetres away (in the downstream direction of the article) from the mouth end (or mouth end face) of the device cavity or device itself. When the article is received within the device cavity, the ventilation zone may be located at least 1 millimetres away (in the downstream direction of the article) from the mouth end (or mouth end face) of the device cavity or device itself. When the article is received within the device cavity, the ventilation zone may be located at least 2 millimetres away (in the downstream direction of the article) from the mouth end (or mouth end face) of the device cavity or device itself.
  • Such positioning of the ventilation zone ensures the ventilation zone is not occluded within the device cavity itself, while also minimising the risk of occlusion by a user's lips or hands as the ventilation zone is located at the most upstream position from the downstream end of the article as reasonably possible without being occluded within the device cavity.
  • 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 aerosol-generating experiences.
  • the power supply may have sufficient capacity to allow for continuous heating of an aerosol-generating substrate for a period of around six minutes, corresponding to the typical time taken to smoke a conventional cigarette, or for a period that is a multiple of six minutes.
  • the power supply may have sufficient capacity to allow for a predetermined number of puffs or discrete activations of the heater.
  • An aerosol-generating article comprising: a rod of aerosol-generating substrate.
  • EX4 An aerosol-generating article according to example EX3, wherein the tobacco material has a density of less than 350 milligrams per cubic centimetre.
  • EX8 An aerosol-generating article according to example EX7, wherein the tobacco material has a density of between 200 milligrams per cubic centimetre and 400 milligrams per cubic centimetre.
  • An aerosol-generating article according to any preceding example comprising a downstream section provided downstream of the rod of aerosol-generating substrate.
  • EX17 An aerosol-generating article according to example EX15 or EX16, wherein the ventilation zone is at a location along the downstream hollow tubular element.
  • EX18 An aerosol-generating article according to example EX17, wherein the ventilation zone is at a location towards an upstream end of the downstream hollow tubular element.
  • EX25 An aerosol-generating article according to example EX24, wherein the hollow tubular cooling element has a length of at least 20 millimetres.
  • EX27 An aerosol-generating article according to any one of examples EX24 to EX26, wherein the hollow tubular cooling element has a length less than or equal to 50 millimetres.
  • EX62 An aerosol-generating article according to example EX61, wherein the rod of aerosol-generating substrate has an aerosol former content of less than or equal to 30 percent by weight on a dry weight basis.
  • EX66 An aerosol-generating article according to any one of examples EX61 to EX65, wherein the one or more aerosol formers comprise one or more of glycerine and propylene glycol.
  • EX68 An aerosol-generating article according to any one of examples EX3 to EX67, wherein the tobacco material comprises a shredded tobacco material.
  • EX69 An aerosol-generating article according to any preceding example, wherein a ratio of the length of the rod of aerosol-generating substrate to the total length of the aerosol-generating article is at least 0.2, preferably 0.25.
  • An aerosol-generating system comprising:
  • FIGS. 3 a & 3 b shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • FIGS. 4 a & 4 b shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • FIG. 10 shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • FIG. 11 shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • FIG. 12 shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • FIG. 14 shows a schematic side sectional view of an aerosol-generating article in accordance with the present disclosure
  • Aerosol-generating articles shown in all Figures of the present disclosure comprise a rod 12 of aerosol-generating substrate and a downstream section 14 located downstream of the rod 12 of aerosol-generating substrate. Aerosol-generating articles extend from an upstream or distal end 18 to a downstream or mouth end 19 . The downstream or mouth end 19 is defined by the downstream end of the downstream section 14 .
  • the rod 12 of aerosol-generating substrate is circumscribed by a wrapper (not shown), and comprises at least one of the types of aerosol-generating substrate described in the present disclosure, such as plant cut filler, particularly tobacco cut filler, homogenised tobacco, a gel formulation, or a homogenised plant material comprising particles of a plant other than tobacco.
  • plant cut filler particularly tobacco cut filler, homogenised tobacco, a gel formulation, or a homogenised plant material comprising particles of a plant other than tobacco.
  • the rod 12 of the aerosol-generating articles shown in all Figures have an average tobacco density of about 250 mg per cubic centimetre.
  • the downstream section 14 of the aerosol-generating article 10 shown in FIG. 1 comprises a hollow tubular cooling element 22 , a downstream filter segment 24 , and a downstream, or mouth end, hollow tubular element 26 .
  • the hollow tubular cooling element 22 is located immediately downstream of the rod 12 of aerosol-generating substrate. In other words, the hollow tubular cooling element 22 abuts the downstream end of the rod 12 .
  • the downstream filter segment 24 abuts the downstream end of the hollow tubular cooling element 22 and the downstream hollow tubular element 26 abuts the downstream end of the downstream filter segment 24 .
  • the downstream filter segment 24 is therefore located between the hollow tubular cooling element 22 and the downstream hollow tubular element 26 .
  • the downstream end 19 of the article 10 is defined by the downstream end of the downstream hollow tubular element 26 .
  • the hollow tubular cooling element 22 is provided in the form of a hollow cylindrical tube made of cardboard or cellulose acetate.
  • the hollow tubular cooling segment 22 defines an internal cavity that extends all the way from an upstream end of the hollow tubular cooling element 22 to an downstream end of the hollow tubular cooling element 22 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular cooling element 22 may not substantially contribute to the overall RTD of the aerosol-generating article 10 .
  • the length of the hollow tubular cooling element 22 is about 25 mm.
  • the wall thickness of the hollow tubular cooling element 22 is about 250 micrometres ( ⁇ m).
  • the downstream hollow tubular element 26 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the downstream hollow tubular element 26 defines an internal cavity that extends all the way from an upstream end of the downstream hollow tubular element 26 to an downstream end of the downstream hollow tubular element 26 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the downstream hollow tubular element 26 does not substantially contribute to the overall RTD of the aerosol-generating article 10 .
  • the length of the downstream hollow tubular element 26 is about 6 mm.
  • the wall thickness of the downstream hollow tubular element 26 is about 1 mm.
  • the aerosol-generating article 102 shown in FIG. 3 a is similar to the aerosol-generating article 101 shown in FIG. 2 and differs only in the following aspects.
  • the hollow tubular cooling element 22 is shorter and the downstream hollow tubular element 27 is longer.
  • the length of the hollow tubular cooling element 22 is about 25 mm.
  • the length of the downstream hollow tubular element 27 is about 20 mm.
  • the ventilation zone 36 is provided along the downstream hollow tubular element 27 .
  • the ventilation zone 36 is provided at about 2 millimetres from the upstream end of the downstream hollow tubular element 26 .
  • the ventilation zone 36 comprises at least one circumferential row of perforations extending through the peripheral wall of the downstream hollow tubular element 27 and any wrapper (not shown) circumscribing the downstream hollow tubular element 27 .
  • a ventilation zone may also be provided at a location on the hollow tubular cooling element 22 .
  • the aerosol-generating article 103 shown in FIG. 3 b is similar to the aerosol-generating article 102 shown in FIG. 3 a and differs only in the following aspects.
  • the downstream hollow tubular element 27 comprises two abutting hollow tubular segments 271 , 272 .
  • the first hollow tubular segment 271 is located between the downstream filter segment 24 and the second first hollow tubular segment 272 .
  • the second hollow tubular segment 272 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the second hollow tubular segment 272 defines an internal cavity that extends all the way from an upstream end of the second hollow tubular segment 272 to an downstream end of the second hollow tubular segment 272 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the second hollow tubular segment 272 does not substantially contribute to the overall RTD of the aerosol-generating article 103 .
  • the length of the second hollow tubular segment 272 is about 10 mm.
  • the wall thickness of the second hollow tubular segment 272 is about 1 mm.
  • the downstream section 14 of the aerosol-generating article 20 shown in FIG. 5 comprises a hollow tubular support element 28 , a cooling element 32 , and a downstream filter segment 24 .
  • the hollow tubular support element 28 is located immediately downstream of the rod 12 of aerosol-generating substrate. In other words, the hollow tubular support element 28 abuts the downstream end of the rod 12 .
  • the cooling element 32 abuts the downstream end of the hollow tubular support element 28 and the downstream filter segment 24 abuts the downstream end of the cooling element 32 .
  • the cooling element 32 is therefore located between the hollow tubular support element 28 and the downstream filter segment 24 .
  • the downstream end 19 of the article 20 is defined by the downstream end of the downstream filter segment 24 .
  • the length of the rod 12 of aerosol-generating substrate is about 25 mm.
  • the hollow tubular support element 28 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the hollow tubular support element 28 defines an internal cavity that extends all the way from an upstream end of the hollow tubular support element 28 to an downstream end of the hollow tubular support element 28 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular support element 28 may not substantially contribute to the overall RTD of the aerosol-generating article 20 .
  • the length of hollow tubular support element 28 is about 8 mm.
  • the wall thickness of the hollow tubular support element 28 is about 1.5 mm.
  • the cooling element 32 is formed by thin polylactic acid (PLA) sheet material that has been crimped, pleated, gathered, or folded to form the channels.
  • the length of the cooling element 32 is about 18 mm.
  • the downstream filter segment 24 comprises a cylindrical plug of cellulose acetate tow.
  • the length of the downstream filter segment 24 is about 7 mm.
  • a maximum external diameter of the aerosol-generating article 20 is about 7.3 mm.
  • the aerosol-generating article 201 shown in FIG. 6 is similar to the aerosol-generating article 20 shown in FIG. 5 and differs in that it further comprises a hollow tubular cooling element 22 and in that the rod 12 of aerosol-generating substrate is shorter.
  • the length of the rod 12 of aerosol-generating substrate is about 12 mm.
  • the hollow tubular cooling element 22 is located immediately downstream of the cooling element 32 and immediately upstream of the downstream filter segment 24 . In other words, the hollow tubular cooling element 22 abuts the cooling element 32 and the downstream filter segment 24 .
  • the hollow tubular cooling element 22 is provided in the form of a hollow cylindrical tube made of cardboard.
  • the hollow tubular cooling segment 22 defines an internal cavity that extends all the way from an upstream end of the hollow tubular cooling element 22 to an downstream end of the hollow tubular cooling element 22 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular cooling element 22 may not substantially contribute to the overall RTD of the aerosol-generating article 201 .
  • the length of the hollow tubular cooling element 22 is about 25 mm.
  • the wall thickness of the hollow tubular cooling element 22 is about 250 micrometres ( ⁇ m).
  • the aerosol-generating article 202 shown in FIG. 7 is similar to the aerosol-generating article 201 shown in FIG. 6 and differs only in that it further comprises a downstream hollow tubular element 27 .
  • the downstream hollow tubular element 27 abuts the downstream end of the downstream filter segment 24 .
  • the downstream filter segment 24 is therefore located between the hollow tubular cooling element 22 and the downstream hollow tubular element 27 .
  • the downstream end 19 of the article 202 is defined by the downstream end of the downstream hollow tubular element 27 .
  • the downstream hollow tubular element 27 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the downstream hollow tubular element 27 defines an internal cavity that extends all the way from an upstream end of the downstream hollow tubular element 27 to an downstream end of the downstream hollow tubular element 27 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the downstream hollow tubular element 27 may not substantially contribute to the overall RTD of the aerosol-generating article 202 .
  • the length of the downstream hollow tubular element 27 is about 5 mm.
  • the wall thickness of the downstream hollow tubular element 27 is about 1 mm.
  • the length of the rod 12 of aerosol-generating substrate is about 25 mm.
  • the hollow tubular cooling element 22 is provided in the form of a hollow cylindrical tube made of cardboard or cellulose acetate.
  • the hollow tubular cooling segment 22 defines an internal cavity that extends all the way from an upstream end of the hollow tubular cooling element 22 to an downstream end of the hollow tubular cooling element 22 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular cooling element 22 may not substantially contribute to the overall RTD of the aerosol-generating article 30 .
  • the length of the hollow tubular cooling element 22 is about 21 mm.
  • the wall thickness of the hollow tubular cooling element 22 is about 250 micrometres ( ⁇ m).
  • the downstream filter segment 24 comprises a cylindrical plug of cellulose acetate tow.
  • the length of the downstream filter segment 24 is about 7 mm.
  • the aerosol-generating article 30 comprises a ventilation zone 36 provided at a location along the hollow tubular cooling element 22 .
  • the ventilation zone 36 comprises at least one circumferential row of perforations extending through the peripheral wall of the hollow tubular cooling element 22 and any wrapper (not shown) circumscribing the hollow tubular cooling element 22 .
  • the ventilation zone 36 is provided at about 2 millimetres from the downstream end of the hollow tubular cooling element 22 .
  • the aerosol-generating article 301 shown in FIG. 9 is similar to the aerosol-generating article 30 shown in FIG. 8 and differs only in that the rod 12 is shorter and the hollow tubular cooling element 22 is longer.
  • the length of the rod 12 of aerosol-generating substrate is about 12 mm and the length of the hollow tubular cooling element 22 is about 45 mm.
  • the aerosol-generating article 302 shown in FIG. 10 is similar to the aerosol-generating article 301 shown in FIG. 8 and differs in that the rod 12 is shorter and the hollow tubular cooling element 22 is longer, and that the article 302 further comprises a downstream hollow tubular element 27 .
  • the length of the rod 12 of aerosol-generating substrate is about 12 mm and the length of the hollow tubular cooling element 22 is about 40 mm.
  • the downstream filter segment 24 is therefore located between the hollow tubular cooling element 22 and the downstream hollow tubular element 27 .
  • the downstream end 19 of the article 302 is defined by the downstream end of the downstream hollow tubular element 27 .
  • the aerosol-generating article 304 shown in FIG. 11 is similar to the aerosol-generating article 302 shown in FIG. 10 and differs in that the ventilation zone 36 is instead provided along the downstream hollow tubular element 27 .
  • the ventilation zone 36 is provided at about 2 millimetres from the upstream end of the downstream hollow tubular element 27 .
  • the ventilation zone 36 comprises at least one circumferential row of perforations extending through the peripheral wall of the downstream hollow tubular element 27 and any wrapper (not shown) circumscribing the downstream hollow tubular element 27 . It will be appreciated that, in addition to the ventilation zone 36 provided along the downstream hollow tubular element 27 , a ventilation zone may also be provided at a location on the hollow tubular cooling element 22 .
  • the aerosol-generating article 40 shown in FIG. 12 comprises a rod 12 of aerosol-generating substrate and a downstream section 14 located downstream of the rod 12 of aerosol-generating substrate. Further, the aerosol-generating article 40 comprises an upstream section 16 located upstream of the rod 12 of aerosol-generating substrate. The distal end 18 of the article is defined by the upstream end of the upstream section 16 .
  • the length of the rod 12 of aerosol-generating substrate is about 20 mm.
  • the hollow tubular support element 28 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the hollow tubular support element 28 defines an internal cavity that extends all the way from an upstream end of the hollow tubular support element 28 to an downstream end of the hollow tubular support element 28 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular support element 28 may not substantially contribute to the overall RTD of the aerosol-generating article 40 .
  • the length of the hollow tubular support element 28 is about 8 mm.
  • the wall thickness of the hollow tubular support element 28 is about 1.5 mm.
  • the hollow tubular cooling element 22 is provided in the form of a hollow cylindrical tube made of cardboard or cellulose acetate.
  • the hollow tubular cooling segment 22 defines an internal cavity that extends all the way from an upstream end of the hollow tubular cooling element 22 to an downstream end of the hollow tubular cooling element 22 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the hollow tubular cooling element 22 may not substantially contribute to the overall RTD of the aerosol-generating article 40 .
  • the length of the hollow tubular cooling element 22 is about 8 mm.
  • the wall thickness of the hollow tubular cooling element 22 is about 250 micrometres ( ⁇ m).
  • the downstream filter segment 24 comprises a cylindrical plug of cellulose acetate tow.
  • the length of the downstream filter segment 24 is about 12 mm.
  • the aerosol-generating article 40 comprises a ventilation zone 36 provided at a location along the hollow tubular cooling element 22 .
  • the ventilation zone 36 comprises at least one circumferential row of perforations extending through the peripheral wall of the hollow tubular cooling element 22 and any wrapper (not shown) circumscribing the hollow tubular cooling element 22 .
  • the ventilation zone 36 is provided at about 2 millimetres from the downstream end of the hollow tubular cooling element 22 .
  • the aerosol-generating article 40 comprises an elongate susceptor element 44 located within the rod 12 of aerosol-generating substrate.
  • the susceptor element 44 is arranged substantially longitudinally within the rod 12 , such as to be approximately parallel to the longitudinal direction of the rod 12 .
  • the aerosol-generating substrate is heated by the susceptor element 44 , when the susceptor element 44 is inductively heated when located within a fluctuating electromagnetic field.
  • the susceptor element 44 is positioned in a radially central position within the rod and extends effectively along the longitudinal axis of the rod 12 .
  • the susceptor element 44 extends all the way from an upstream end to a downstream end of the rod 12 .
  • the susceptor element 44 has substantially the same length as the rod 12 of aerosol-generating substrate.
  • the susceptor element 44 is provided in any form described in the present disclosure and has a length substantially equal to the length of the rod 12 .
  • the upstream section 16 advantageously prevents the susceptor element 44 from being dislodged. Further, this ensures that the consumer cannot accidentally contact the heated susceptor element 44 after use.
  • the aerosol-generating article 401 shown in FIG. 13 is similar to the aerosol-generating article 40 shown in FIG. 12 and differs only in that the rod 12 is shorter and the hollow tubular cooling element 22 is longer.
  • the length of the rod 12 of aerosol-generating substrate is about 12 mm and the length of the hollow tubular cooling element 22 is about 25 mm.
  • the aerosol-generating article 402 shown in FIG. 14 is similar to the aerosol-generating article 40 shown in FIG. 12 and differs in that the rod 12 is shorter and the hollow tubular cooling element 22 is longer, and in that the article 402 further comprises a downstream hollow tubular element 27 .
  • the length of the rod 12 of aerosol-generating substrate is about 12 mm and the length of the hollow tubular cooling element 22 is about 20 mm.
  • the downstream filter segment 24 is therefore located between the hollow tubular cooling element 22 and the downstream hollow tubular element 27 .
  • the downstream end 19 of the article 402 is defined by the downstream end of the downstream hollow tubular element 27 .
  • the downstream hollow tubular element 27 is provided in the form of a hollow cylindrical tube made of cellulose acetate.
  • the downstream hollow tubular element 27 defines an internal cavity that extends all the way from an upstream end of the downstream hollow tubular element 27 to an downstream end of the downstream hollow tubular element 27 .
  • the internal cavity is substantially empty, and so substantially unrestricted airflow is enabled along the internal cavity.
  • the downstream hollow tubular element 27 may not substantially contribute to the overall RTD of the aerosol-generating article 402 .
  • the length of the downstream hollow tubular element 27 is about 5 mm.
  • the wall thickness of the downstream hollow tubular element 27 is about 1 mm.
  • the aerosol-generating article 403 shown in FIG. 15 is similar to the aerosol-generating article 402 shown in FIG. 14 and differs in that the ventilation zone 36 is provided along the downstream hollow tubular element 27 .
  • the ventilation zone 36 is provided at about 2 millimetres from the upstream end of the downstream hollow tubular element 27 .
  • the ventilation zone 36 comprises at least one circumferential row of perforations extending through the peripheral wall of the downstream hollow tubular element 27 and any wrapper (not shown) circumscribing the downstream hollow tubular element 27 . It will be appreciated that, in addition to the ventilation zone 36 provided along the downstream hollow tubular element 27 , a ventilation zone may also be provided at a location on the hollow tubular cooling element 22 .
  • FIG. 16 illustrates an aerosol-generating system 1 comprising an exemplary aerosol-generating device 50 and an aerosol-generating article according to any one shown in FIGS. 1 to 15 and described above.
  • FIG. 16 illustrates a downstream, mouth end portion of the aerosol-generating device 50 where the device cavity is defined and the aerosol-generating article can be received.
  • the aerosol-generating device 50 comprises a housing (or body) 4 , extending between a mouth end 2 and a distal end (not shown).
  • the housing 4 comprises a peripheral wall 6 .
  • the peripheral wall 6 defines a device cavity for receiving an aerosol-generating article 10 .
  • the device cavity is defined by a closed, distal end and an open, mouth end.
  • the mouth end of the device cavity is located at the mouth end of the aerosol-generating device 1 .
  • the aerosol-generating article 10 is configured to be received through the mouth end of the device cavity and is configured to abut a closed end of the device cavity.
  • a device air flow channel 5 is defined within the peripheral wall 6 .
  • the air-flow channel 5 extends between an inlet 7 located at the mouth end of the aerosol-generating device 1 and the closed end of the device cavity. Air may enter the aerosol-generating substrate 12 via an aperture (not shown) provided at the closed end of the device cavity, ensuring fluid communication between the air flow channel 5 and the aerosol-generating substrate 12 .
  • the aerosol-generating device 1 further comprises a heater (not shown) and a power source (not shown) for supplying power to the heater.
  • a controller (not shown) is also provided to control such supply of power to the heater.
  • the heater is configured to controllably heat the aerosol-generating article during use, when the aerosol-generating article is received within the device 1 .
  • the heater is preferably arranged to externally heat the aerosol-generating substrate of the aerosol-generating article for optimal aerosol generation.
  • the ventilation zone of an aerosol-generating article is arranged to be exposed when the aerosol-generating article is received within the aerosol-generating device 1 .

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Tobacco Products (AREA)
US18/853,644 2022-04-12 2023-04-12 Aerosol-generating article comprising a ventilation zone downstream of a downstream filter segment Pending US20250234918A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP22168022 2022-04-12
EP22168022.6 2022-04-12
PCT/EP2023/059527 WO2023198758A1 (en) 2022-04-12 2023-04-12 Aerosol-generating article comprising a ventilation zone downstream of a downstream filter segment

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US20250234918A1 true US20250234918A1 (en) 2025-07-24

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US (1) US20250234918A1 (enExample)
EP (1) EP4507529A1 (enExample)
JP (1) JP2025511824A (enExample)
KR (1) KR20250002310A (enExample)
CN (1) CN118946278A (enExample)
WO (1) WO2023198758A1 (enExample)

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Publication number Priority date Publication date Assignee Title
US3490461A (en) * 1967-04-20 1970-01-20 Philip Morris Inc Cigarette ventilation
AR089183A1 (es) * 2011-11-30 2014-08-06 Philip Morris Products Sa Articulo para fumar con una boquilla ventilada que comprende primeras y segundas vias de flujo de aire
CN115944117A (zh) 2014-05-21 2023-04-11 菲利普莫里斯生产公司 具有内部感受器的气溶胶生成制品
KR102547497B1 (ko) * 2015-03-17 2023-06-26 필립모리스 프로덕츠 에스.에이. 맞춤형 튜브를 구비한 흡연 물품 조립체
TWI693031B (zh) * 2015-04-30 2020-05-11 瑞士商菲利浦莫里斯製品股份有限公司 包含具高通氣度之可卸式清新劑遞送元件的氣溶膠產生物件
EP3890517A1 (en) 2018-12-06 2021-10-13 Philip Morris Products, S.A. Aerosol-generating article with high aerosol former content
GB201918991D0 (en) * 2019-12-20 2020-02-05 Nicoventures Trading Ltd A component for an article for use in a con-compustible aerosol provision system
GB202011953D0 (en) * 2020-07-31 2020-09-16 Nicoventures Trading Ltd Consumable for an aerosol provision sysytem

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EP4507529A1 (en) 2025-02-19
KR20250002310A (ko) 2025-01-07
CN118946278A (zh) 2024-11-12
JP2025511824A (ja) 2025-04-16

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