US20250234917A1 - Aerosol-generating article with long rod of aerosol-forming substrate - Google Patents

Aerosol-generating article with long rod of aerosol-forming substrate

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Publication number
US20250234917A1
US20250234917A1 US18/853,635 US202318853635A US2025234917A1 US 20250234917 A1 US20250234917 A1 US 20250234917A1 US 202318853635 A US202318853635 A US 202318853635A US 2025234917 A1 US2025234917 A1 US 2025234917A1
Authority
US
United States
Prior art keywords
aerosol
forming substrate
rod
percent
generating article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US18/853,635
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English (en)
Inventor
Gennaro Campitelli
Bruno Christian Joseph CHASSOT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
Original Assignee
Philip Morris Products SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philip Morris Products SA filed Critical Philip Morris Products SA
Assigned to PHILIP MORRIS PRODUCTS S.A. reassignment PHILIP MORRIS PRODUCTS S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHASSOT, Bruno Christian Joseph, CAMPITELLI, Gennaro
Publication of US20250234917A1 publication Critical patent/US20250234917A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B13/00—Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff
    • A24B13/02—Flakes or shreds of tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/302—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by natural substances obtained from animals or plants
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/32—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by acyclic compounds
    • 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
    • A24D1/042—Cigars; Cigarettes with mouthpieces or filter-tips with mouthpieces
    • 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
    • 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

Definitions

  • the present invention relates to an aerosol-generating article.
  • the aerosol-generating article comprises an aerosol-forming substrate, which produces an inhalable aerosol upon heating.
  • Aerosol-generating articles in which an aerosol-forming substrate, such as a tobacco-containing substrate, is heated rather than combusted, are known in the art.
  • an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-forming substrate or material, which may be located in contact with, within, around, or downstream of the heat source.
  • volatile compounds are released from the aerosol-forming substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.
  • a number of prior art documents disclose aerosol-generating devices for consuming aerosol-generating articles.
  • Such devices include, for example, electrically heated aerosol-generating devices in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating device to the aerosol-forming substrate of a heated aerosol-generating article.
  • electrically heated aerosol-generating devices have been proposed that comprise an internal heater blade which is adapted to be inserted into the aerosol-forming substrate.
  • Use of an aerosol-generating article in combination with an external heating system is also known.
  • WO 2020/115151 describes the provision of one or more heating elements arranged around the periphery of the aerosol-generating article when the aerosol-generating article is received in a cavity of the aerosol-generating device.
  • inductively heatable aerosol-generating articles comprising an aerosol-forming substrate and a susceptor arranged within the aerosol-forming substrate have been proposed by WO 2015/176898.
  • Aerosol-generating articles in which a tobacco-containing substrate is heated rather than combusted present a number of challenges that were not encountered with conventional smoking articles.
  • aerosol-forming substrates For example, with some aerosol-forming substrates, it can be difficult to deliver sufficient aerosol to a user. This may be particularly true with aerosol-forming substrates that contain a relatively high proportion of non-tobacco components.
  • the aerosol-generating system may comprise an aerosol-generating article.
  • the aerosol-generating article may comprise a rod of aerosol-forming substrate.
  • the aerosol-generating article may comprise a hollow tubular element at a downstream end of the rod of aerosol-forming substrate.
  • the aerosol-generating article may comprise a mouthpiece element at a downstream end of the hollow tubular element.
  • the length of the rod of aerosol-forming substrate may be at least 30 percent of the length of the aerosol-generating article.
  • the rod of aerosol-forming substrate may have a tobacco content of between 30 percent by weight on dry weight basis and 90 percent by weight on a dry weight basis.
  • the aerosol-generating system may comprise an aerosol-generating device.
  • the aerosol-generating device may comprise a heating chamber for receiving the aerosol-generating article.
  • the aerosol-generating device may comprise a heating element.
  • the heating element may have a length that is less than the length of the rod of aerosol-forming substrate.
  • having a larger aerosol-forming substrate may provide for a longer user experience.
  • the aerosol-generating article can still be used with conventional aerosol-generating devices.
  • the length of the rod of aerosol-forming substrate may be between 30 and 45 percent of the length of the aerosol-generating article.
  • the length of the rod of aerosol-forming substrate may be between 31 and 43 percent of the length of the aerosol-generating article.
  • the rod of aerosol-forming substrate has a length of 17 millimetres.
  • the rod of aerosol-forming substrate may have a tobacco content of less than or equal to 60 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a tobacco content of less than or equal to 55 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a tobacco content of less than or equal to 50 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 25 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 18 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 15 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 13 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 8 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a flavourant content of less than or equal to 5 percent by weight on a dry weight basis.
  • the one or more flavourants may be one or more of: clove, ginger, mint, rosemary, star anise, and tea.
  • the plurality of flavourants may be a combination of two or more of: clove, ginger, mint, rosemary, star anise, and tea.
  • the rod of aerosol-forming substrate may comprise clove.
  • the rod of aerosol-forming substrate may have a clove content of at least 0.1 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 1 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 3 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 5 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 8 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 13 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 15 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of at least 18 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 25 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 18 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 15 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 13 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 8 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove content of less than or equal to 5 percent by
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 0.1 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 1 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 3 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 5 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 8 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 13 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 15 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of at least 18 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of less than or equal to 13 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of less than or equal to 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of less than or equal to 8 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of less than or equal to 5 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of between 0.1 and 25 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of between 0.1 and 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of between 5 and 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of between and 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a clove, ginger, mint, rosemary, star anise, and tea content of between 15 and 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may comprise at least 30 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise at least 35 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise at least 40 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise at least 45 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise at least 50 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise less than or equal to 75 milligrams of clove
  • the rod of aerosol-forming substrate may comprise less than or equal to 70 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise less than or equal to 65 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise less than or equal to 60 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise less than or equal to 55 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise between 30 milligrams and 75 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise between 35 milligrams and 70 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise between 40 milligrams and 65 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise between 45 milligrams and 60 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise between 50 milligrams and 55 milligrams of clove.
  • the rod of aerosol-forming substrate may comprise less than or equal to 75 milligrams of clove, ginger, mint, rosemary, star anise, and tea
  • the rod of aerosol-forming substrate may comprise less than or equal to 70 milligrams of clove, ginger, mint, rosemary, star anise, and tea.
  • the rod of aerosol-forming substrate may comprise less than or equal to 65 milligrams of clove, ginger, mint, rosemary, star anise, and tea.
  • the rod of aerosol-forming substrate may comprise less than or equal to 60 milligrams of clove, ginger, mint, rosemary, star anise, and tea.
  • the rod of aerosol-forming substrate may comprise less than or equal to 55 milligrams of clove, ginger, mint, rosemary, star anise, and tea.
  • the aerosol former may comprise glycerine.
  • the aerosol former may comprise propylene glycol.
  • the aerosol former may consist of glycerine.
  • the aerosol former may consist of propylene glycol.
  • the aerosol former may comprise a combination of glycerine and propylene glycol.
  • the aerosol former may consist of a combination of glycerine and propylene glycol.
  • the rod of aerosol-forming substrate may have a glycerine content of at least 5 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a glycerine content of at least 10 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a glycerine content of at least 15 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a glycerine content of at least 20 percent by weight on a dry weight basis.
  • the rod of aerosol-forming substrate may have a glycerine content of at least 25 percent by weight on a dry weight basis.
  • the aerosol-generating article may have a length of less than or equal to 70 millimetres.
  • the aerosol-generating article may have a length of less than or equal to 60 millimetres.
  • the aerosol-generating article may have a length of less than or equal to 50 millimetres.
  • the aerosol-generating article may have a length of less than or equal to 45 millimetres.
  • the aerosol-generating article may have a length of 45 millimetres.
  • the external diameter of the aerosol-generating article may be substantially constant over the whole length of the aerosol-generating article. As an alternative, different portions of the aerosol-generating article may have different external diameters.
  • the hollow tubular element may have a length of at least 15 millimetres.
  • the hollow tubular element may have a length of at least 17 millimetres.
  • the hollow tubular element may have a length of at least 19 millimetres.
  • the hollow tubular element may have a length of less than or equal to 30 millimetres.
  • the hollow tubular element may have a length of less than or equal to 25 millimetres.
  • the hollow tubular element may have a length of less than or equal to 23 millimetres.
  • the thickness of a peripheral wall (in other words, the wall thickness) of the hollow tubular element may be at least 100 micrometres.
  • the wall thickness of the hollow tubular element may be at least 150 micrometres.
  • the wall thickness of the hollow tubular element may be at least 200 micrometres.
  • the wall thickness of the hollow tubular element may be at least 250 micrometres.
  • the wall thickness of the hollow tubular element may be at least 500 micrometres.
  • the wall thickness of the hollow tubular element may be less than or equal to 2 millimetres.
  • the wall thickness of the hollow tubular element may be less than or equal to 1.5 millimetres.
  • the wall thickness of the hollow tubular element may be less than or equal to 1.25 millimetres.
  • the wall thickness of the hollow tubular element may be less than or equal to 1 millimetre.
  • the wall thickness of the hollow tubular element may be less than or equal to 500 micrometres.
  • the thickness of the peripheral wall of the hollow tubular element relatively low may ensure that the overall internal volume of the hollow tubular segment—which is made available for the aerosol to begin the nucleation process as soon as the aerosol components leave the rod of aerosol-forming substrate—and the cross-sectional surface area of the hollow tubular segment are effectively maximised, whilst at the same time ensuring that the hollow tubular segment has the necessary structural strength to prevent a collapse of the aerosol-generating article as well as to provide some support to the rod of aerosol-forming substrate, and that the resistance to draw of the hollow tubular element is minimised.
  • Greater values of cross-sectional surface area of the cavity of the hollow tubular element may be understood to be associated with a reduced speed of the aerosol stream travelling along the aerosol-generating article, which is also expected to favour aerosol nucleation.
  • a hollow tubular element having a relatively low thickness it may be possible to substantially prevent diffusion of ventilation air prior to its contacting and mixing with the stream of aerosol, which is also understood to further favour nucleation phenomena.
  • by providing a more controllably localised cooling of the stream of volatilised species it may be possible to enhance the effect of cooling on the formation of new aerosol particles.
  • the hollow tubular element may an outer diameter that is approximately equal to the outer diameter of the rod of aerosol-forming substrate and to the outer diameter of the aerosol-generating article.
  • the hollow tubular element may have an internal diameter.
  • the hollow tubular element may have a constant internal diameter along a length of the hollow tubular element. However, the internal diameter of the hollow tubular element may vary along the length of the hollow tubular element.
  • the hollow tubular element may have an external diameter of 7.1 or 7.2 millimetres.
  • the hollow tubular element may have an internal diameter of 6.7 millimetres.
  • the hollow tubular element may comprise a polymeric material.
  • the hollow tubular element may comprise a polymeric film.
  • the polymeric film may comprise a cellulosic film.
  • the hollow tubular element may comprise low density polyethylene (LDPE) or polyhydroxyalkanoate (PHA) fibres.
  • LDPE low density polyethylene
  • PHA polyhydroxyalkanoate
  • the hollow tubular element may comprise cellulose acetate tow.
  • the mouthpiece element may be provided downstream of the rod of aerosol-forming substrate.
  • the mouthpiece element may extend all the way to a mouth end of the aerosol-generating article.
  • the mouthpiece element may comprise at least one mouthpiece filter segment formed of a fibrous filtration material.
  • the mouthpiece element may be located downstream of a hollow tubular element, which is described above.
  • the mouthpiece element may extend between the hollow tubular element and the downstream end of the aerosol-generating article.
  • the fibrous filtration material may be for filtering the aerosol that is generated from the aerosol-forming substrate. Suitable fibrous filtration materials would be known to the skilled person.
  • the at least one mouthpiece filter segment may comprise a cellulose acetate filter segment formed of cellulose acetate tow.
  • the mouthpiece element may consist of a single mouthpiece filter segment.
  • the mouthpiece element may include two or more mouthpiece filter segments.
  • the two or more mouthpiece filter elements may be axially aligned in an abutting end to end relationship with each other.
  • the mouthpiece element may be connected to one or more of the adjacent upstream components of the aerosol-generating article by means of a tipping wrapper.
  • the mouthpiece element may have an external diameter that is approximately equal to the external diameter of the aerosol-generating article.
  • the diameter of a mouthpiece element (or mouthpiece filter segment) may be substantially the same as the outer diameter of the hollow tubular element.
  • the outer diameter of the hollow tubular element may be about 7.2 millimetre, plus or minus 10 percent.
  • the mouthpiece element may have a length of less than or equal to 11 millimetres.
  • the mouthpiece element may have a length of less than or equal to 9 millimetres.
  • the mouthpiece element may have a length of less than or equal to 7 millimetres.
  • the mouthpiece element may have a length of 7 millimetres.
  • the mouthpiece element may have an external diameter of between 5 millimetres and millimetres.
  • the mouthpiece element may have an external diameter of between 6 millimetres and 8 millimetres.
  • the mouthpiece element may have an external diameter of between 7 millimetres and 8 millimetres.
  • the mouthpiece element may have an external diameter of 7.2 millimetres, plus or minus 10 percent.
  • the mouthpiece element may have an external diameter of 7.25 millimetres, plus or minus 10 percent.
  • a distance between the ventilation zone and an upstream end of the aerosol-generating article may be less than or equal to 33 millimetres.
  • a distance between the ventilation zone and an upstream end of the aerosol-generating article may be less than or equal to 31 millimetres.
  • Such, or any, ventilation zone may extend through the peripheral wall of the hollow tubular element. As such, fluid communication is established between the flow channel internally defined by the hollow tubular element and the outer environment.
  • 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 about 17.5 millilitres per second at the output or downstream end of the measured component at a temperature of about 22 degrees Celsius, a pressure of about 101 kPa (about 760 Torr) and a relative humidity of about 60%.
  • a hollow tubular element provides an unrestricted flow channel. This means that the hollow tubular element provides a negligible level of resistance to draw (RTD).
  • RTD resistance to draw
  • the term “negligible level of resistance to draw” is used to describe a resistance to draw of less than 1 mm H 2 O per 10 millimetres of length of the hollow tubular element, preferably less than 0.4 mm H 2 O per 10 millimetres of length of the hollow tubular element, more preferably less than 0.1 mm H 2 O per 10 millimetres of length of the hollow tubular element.
  • the resistance to draw of a hollow tubular element may be at least 0 millimetres H 2 O, or at least about 0.25 millimetres H 2 O or at least about 0.5 millimetres H 2 O or at least about 1 millimetre H 2 O.
  • the resistance to draw of the hollow tubular element may be from about 0 millimetres H 2 O to about 5 millimetres H 2 O, preferably from about 0.25 millimetres H 2 O to about 5 millimetres H 2 O preferably from about 0.5 millimetres H 2 O to about 5 millimetres H 2 O.
  • the resistance to draw of the hollow tubular element may be from about 1 millimetre H 2 O to about 5 millimetres H 2 O.
  • the resistance to draw of the hollow tubular element may be from about 0 millimetres H 2 O to about 2.5 millimetres H 2 O, preferably from about 0.25 millimetres H 2 O to about 2.5 millimetres H 2 O, more preferably from about 0.5 millimetres H 2 O to about 2.5 millimetres H 2 O.
  • the resistance to draw of the hollow tubular element may be from about 0 millimetres H 2 O to about 2 millimetres H 2 O, preferably from about 0.25 millimetres H 2 O to about 2 millimetres H 2 O, more preferably from about 0.5 millimetres H 2 O to about 2 millimetres H 2 O.
  • the resistance to draw (RTD) of the mouthpiece element may be at least about 0 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be at least about 3 mm H 2 O.
  • the RTD of the mouthpiece element may be at least about 6 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be greater than or equal to about 0 mm H 2 O and less than about 12 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be greater than or equal to about 3 mm H 2 O and less than about 12 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be greater than or equal to about 0 mm H 2 O and less than about 11 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be greater than or equal to about 3 mm H 2 O and less than about 11 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be greater than or equal to about 6 mm H 2 O and less than about 10 mm H 2 O.
  • the resistance to draw of the mouthpiece element may be about 8 mm H 2 O.
  • the mouthpiece element may be formed of a fibrous material.
  • the mouthpiece element may be formed of a porous material.
  • the mouthpiece element may be formed of a biodegradable material.
  • the mouthpiece element may be formed of a cellulose material, such as cellulose acetate.
  • a mouthpiece element may be formed from a bundle of cellulose acetate fibres having a denier per filament between about and about 15.
  • the mouthpiece element may be formed of a polylactic acid based material.
  • the mouthpiece element may be formed of a bioplastic material, preferably a starch-based bioplastic material.
  • the mouthpiece element may be made by injection moulding or by extrusion.
  • Bioplastic-based materials are advantageous because they are able to provide mouthpiece element structures which are simple and cheap to manufacture with a particular and complex cross-sectional profile, which may comprise a plurality of relatively large air flow channels extending through the mouthpiece element material, that provides suitable RTD characteristics.
  • the mouthpiece element may be formed from a sheet of suitable material that has been crimped, pleated, gathered, woven or folded into an element that defines a plurality of longitudinally extending channels.
  • Such sheet of suitable material may be formed of paper, cardboard, a polymer, such as polylactic acid, or any other cellulose-based, paper-based material or bioplastic-based material.
  • a cross-sectional profile of such a mouthpiece element may show the channels as being randomly oriented.
  • the mouthpiece element may be formed in any other suitable manner.
  • the mouthpiece element may be formed from a bundle of longitudinally extending tubes.
  • the longitudinally extending tubes may be formed from polylactic acid.
  • the mouthpiece element may be formed by extrusion, moulding, lamination, injection, or shredding of a suitable material.
  • the aerosol-forming substrate may have a density of at least 150 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of at least 175 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of at least 200 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of at least 250 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of between 150 milligrams per cubic centimetre and 500 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of between 175 milligrams per cubic centimetre and 450 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of between 200 milligrams per cubic centimetre and 400 milligrams per cubic centimetre.
  • the aerosol-forming substrate may have a density of between 250 milligrams per cubic centimetre and 350 milligrams per cubic centimetre.
  • the rod of aerosol-forming substrate may comprise between 80 milligrams and 400 milligrams of aerosol-forming substrate.
  • the rod of aerosol-forming substrate may comprise between 100 milligrams and 350 milligrams of aerosol-forming substrate.
  • the rod of aerosol-forming substrate may comprise between 150 milligrams and 250 milligrams of aerosol-forming substrate.
  • the weight of the rod of aerosol-forming substrate may be less than or equal to 80 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be less than or equal to 75 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be less than or equal to 70 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be less than or equal to 65 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be less than or equal to 60 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 25 percent and 80 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 30 percent and 75 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 35 percent and 70 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 45 percent and 65 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 50 percent and 60 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the weight of the rod of aerosol-forming substrate may be between 50 percent and 55 percent of the weight of the aerosol-generating article on a dry weight basis.
  • the rod of aerosol-forming substrate may comprise shredded tobacco material.
  • the rod of aerosol-forming substrate may comprise tobacco cut filler.
  • the tobacco cut filler may have a density of at least 150 milligrams per cubic centimetre.
  • the tobacco cut filler may have a density of at least 175 milligrams per cubic centimetre.
  • the tobacco cut filler may have a density of at least 200 milligrams per cubic centimetre.
  • the tobacco cut filler may have a density of at least 250 milligrams per cubic centimetre.
  • the rod of aerosol-forming substrate may comprise less than or equal to 400 milligrams of tobacco cut filler.
  • the rod of aerosol-forming substrate may comprise less than or equal to 350 milligrams of tobacco cut filler.
  • the rod of aerosol-forming substrate may comprise less than or equal to 300 milligrams of tobacco cut filler.
  • the rod of aerosol-forming substrate may comprise less than or equal to 250 milligrams of tobacco cut filler.
  • the rod of aerosol-forming substrate may have a length of 17 millimetres.
  • the heating element may be any suitable type of heating element.
  • the heating element may be an external heater.
  • the heating element may be arranged to heat the outer surface of the aerosol-forming substrate.
  • the heater may be arranged for insertion into an aerosol-forming substrate when the aerosol-forming substrate is received within the heating chamber.
  • the heating element may be positioned within the heating chamber.
  • the heating element may comprise at least one heating element.
  • the at least one heating element may be any suitable type of heating element.
  • the aerosol-generating device may comprises only one heating element.
  • the aerosol-generating device may comprise a plurality of heating elements.
  • the heating element may comprise at least one resistive heating element.
  • the heating element may comprise a plurality of resistive heating elements.
  • the resistive heating elements may be 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 heating elements 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.
  • suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetal® and iron-manganese-aluminium based alloys.
  • the at least one resistive heating element may comprise 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 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 heating element may comprise 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 heating chamber.
  • the inductor coil may substantially circumscribe the heating chamber.
  • the inductor coil may extend at least partially along the length of the heating chamber.
  • the heating element 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 heating chamber 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-forming substrate.
  • a susceptor element is located in the aerosol-generating device.
  • the susceptor element may be located in the heating chamber.
  • 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-forming 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-forming 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 heating element may have a length.
  • the rod of aerosol-forming substrate may have a length.
  • the length of the heating element may be less than the length of the aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 95 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 90 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 85 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 80 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 75 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be less than or equal to 70 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 25 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 30 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 35 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 40 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 45 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be at least 50 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be between 25 percent of the length of the rod of aerosol-forming substrate and 95 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be between 50 percent of the length of the rod of aerosol-forming substrate and 90 percent of the length of the rod of aerosol-forming substrate.
  • the length of the heating element may be between 60 percent of the length of the rod of aerosol-forming substrate and 80 percent of the length of the rod of aerosol-forming substrate.
  • the heating chamber may be configured to establish a tight fit with an aerosol-generating article received within the heating chamber. Tight fit may refer to a snug fit.
  • the aerosol-generating device may comprise a peripheral wall. Such a peripheral wall may the heating chamber.
  • the peripheral wall defining the heating chamber may be configured to engage with an aerosol-generating article received within the heating chamber in a tight fit manner, so that there is substantially no gap or empty space between the peripheral wall defining the heating chamber and the aerosol-generating article when received within the aerosol-generating device.
  • the aerosol-generating device may comprise an air-flow channel extending between a channel inlet and a channel outlet.
  • the air-flow channel may be configured to establish a fluid communication between the interior of the heating chamber and the exterior of the aerosol-generating device.
  • the air-flow channel of the aerosol-generating device may be defined within the housing of the aerosol-generating device to enable fluid communication between the interior of the heating chamber and the exterior of the aerosol-generating device.
  • the air-flow channel may be configured to provide air flow into the article in order to deliver generated aerosol to a user drawing from the mouth end of the article.
  • the air-flow channel of the aerosol-generating device may be defined within, or by, the peripheral wall of the housing of the aerosol-generating device.
  • the air-flow channel of the aerosol-generating device may be defined within the thickness of the peripheral wall or by the inner surface of the peripheral wall, or a combination of both.
  • the air-flow channel may partially be defined by the inner surface of the peripheral wall and may be partially defined within the thickness of the peripheral wall.
  • the inner surface of the peripheral wall defines a peripheral boundary of the heating chamber.
  • 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 aerosol-generating device may comprise a power supply.
  • the power supply may be a DC power supply.
  • the power supply may be 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 heating element.
  • the aerosol-generating article 10 comprises an upstream wrapper 44 circumscribing the aerosol-forming substrate 12 and the hollow tubular element 20 .
  • the ventilation zone 30 may also comprise a circumferential row of perforations provided on the upstream wrapper 44 .
  • the perforations of the upstream wrapper 44 overlap the perforations provided on the hollow tubular element 20 . Accordingly, the upstream wrapper 44 overlies the perforations of the ventilation zone 30 provided on the hollow tubular element 20 .
  • the ventilation zone 30 is advantageously located outside of the aerosol-generating device 1 when the aerosol-generating article 10 is inserted in the aerosol-generating device 1 .
  • the ventilation zone 30 is located 1 millimetres downstream from the mouth end 2 of the aerosol-generating device 1 when the aerosol-generating article 10 is received within the aerosol-generating device 1 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Botany (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Medicinal Preparation (AREA)
US18/853,635 2022-04-12 2023-04-12 Aerosol-generating article with long rod of aerosol-forming substrate Pending US20250234917A1 (en)

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EP22167986.3 2022-04-12
EP22167986 2022-04-12
PCT/EP2023/059523 WO2023198754A1 (en) 2022-04-12 2023-04-12 Aerosol-generating article with long rod of aerosol-forming substrate

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