EP3687323B1 - Élément de support pour article de production d'aérosol - Google Patents

Élément de support pour article de production d'aérosol Download PDF

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Publication number
EP3687323B1
EP3687323B1 EP18778485.5A EP18778485A EP3687323B1 EP 3687323 B1 EP3687323 B1 EP 3687323B1 EP 18778485 A EP18778485 A EP 18778485A EP 3687323 B1 EP3687323 B1 EP 3687323B1
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EP
European Patent Office
Prior art keywords
aerosol
support element
hollow tubular
tubular support
generating article
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Active
Application number
EP18778485.5A
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German (de)
English (en)
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EP3687323A1 (fr
Inventor
Leonardo Nappi
Jerome Uthurry
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Philip Morris Products SA
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Philip Morris Products SA
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/17—Filters specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
    • A24B15/167—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes in liquid or vaporisable form, e.g. liquid compositions for electronic cigarettes

Definitions

  • the present invention relates to an aerosol-generating article comprising an aerosol-forming substrate for generating an inhalable aerosol when heated.
  • 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.
  • the aim of such heated aerosol-generating articles is to reduce known harmful smoke constituents produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes.
  • a conventional cigarette is lit when a user applies a flame to one end of the cigarette and draws air through the other end.
  • the localised heat provided by the flame and the oxygen in the air drawn through the cigarette causes the end of the cigarette to ignite, and the resulting combustion generates an inhalable smoke.
  • an inhalable aerosol is typically generated by the transfer of heat from a heat source to a physically separate aerosol-forming substrate or material, which may be located 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 entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol that is inhaled by the consumer.
  • the aerosol-forming substrate is heated by a heater blade of an aerosol-generating device, which is inserted into the substrate.
  • a support element is included immediately downstream of the aerosol-forming substrate.
  • the support element is provided in the form of an annular shaped tube of filtration material, often referred to as a hollow acetate tube.
  • the support element is configured to resist downstream movement of the aerosol-forming substrate during insertion of the heating blade of the aerosol-generating device into the aerosol-forming substrate.
  • the empty space within the hollow support element provides an opening for aerosol to flow from the aerosol-forming substrate towards the mouth end of the aerosol-generating article.
  • the existence of the opening in the hollow support element means that some of the material in the aerosol-forming substrate can be undesirably pushed into the support element, when the heater blade is inserted into the aerosol-forming substrate. This can lead to different amounts of aerosol-forming substrate being heated by the heater blade, and different resistances to draw being experienced by a consumer, when the articles are used. Such differences can lead to an inconsistent experience for consumers.
  • CN 1059266 A describes an aerosol-generating article intended to heat, but not combust, a source of tobacco material to produce an aerosol.
  • the article has a carbon tip fuel source disposed upstream of an aerosol-forming section.
  • the aerosol-forming section consists of a container containing tobacco pellets, and wrapped in a roll of tobacco. Air passages are provided at the downstream end of container to allow aerosol to flow from the container to the mouth end of the article.
  • a hollow tube formed of rigid paper is provided immediately downstream of the container. As illustrated by Figs 2A-B of CN 1059266 A , the paper is folded inward on one side to form retaining means, which is provided to prevent the container from moving downstream.
  • an aerosol-generating article according to appended claim 1.
  • Said article comprises an aerosol-forming substrate; and a hollow tubular support element disposed immediately downstream of the aerosol-forming substrate.
  • the hollow tubular support element defines an opening for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article. At least a portion of the material of the hollow tubular support element inwardly projects into the opening to define one or more internal projections.
  • the one or more internal projections can provide a support barrier for at least part of the aerosol-forming substrate.
  • the aerosol-generating article of the first aspect of the present invention comprises a hollow tubular support element having at least one projection that inwardly projects into its opening.
  • the at least one projection acts to provide a support barrier for at least part of the aerosol-forming substrate. This can reduce the availability of free space for material from the aerosol-forming substrate to be pushed into, when, for example, a heater blade is inserted into the aerosol-forming substrate.
  • the at least one projection can provide a support barrier, which prevents or restricts downstream movement of at least part of the aerosol-forming substrate. Consequently, in the first aspect of the present invention, it is less likely that portions of aerosol-forming material will be pushed out of the aerosol forming substrate, when the article is being used. This can lead to a more consistent experience for a user.
  • the support barrier of the hollow tubular support element is provided in the form of one or more internal projections, the support element can still retain a suitably sized opening for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article. This means that the support element can still have a suitably low resistance to draw. This also means that the support element can still have a suitably low filtration effect.
  • the first aspect of the present invention provides an aerosol-generating article having improved consistency over known aerosol-generating articles, whilst also benefiting from some of the desired properties of such articles.
  • the hollow tubular support element is formed from a fibrous filtration material. Therefore, there is provided an aerosol-generating article comprising: an aerosol-forming substrate; and a hollow tubular support element disposed immediately downstream of the aerosol-forming substrate, the hollow tubular support element being formed from fibrous filtration material.
  • the hollow tubular support element defines an opening for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article. At least a portion of the material of the hollow tubular support element inwardly projects into the opening to define one or more internal projections.
  • the one or more internal projections can provide a support barrier for at least part of the aerosol-forming substrate.
  • the barrier can be elastically deformable and therefore able to deform slightly as a heater element, such as a heater blade is inserted into the aerosol-generating article. This can help to reduce the likelihood of damage being caused to the heater element by the barrier, as the heater element is inserted into the aerosol-generating article.
  • An inwardly projecting, yet also elastically deformable support barrier can therefore provide an optimal balance between preventing major damage or alteration to the aerosol-forming substrate, whilst also avoiding damaging the heater element of an aerosol-generating device.
  • the present invention is particularly suited to aerosol-generating articles having an aerosol-forming substrate in the form of a rod, which is configured to receive one or more heater blades.
  • aerosol-forming substrates may have a number of suitable configurations.
  • the aerosol-forming substrate is in the form of a rod comprising a gathered sheet of aerosol-forming material, for example a gathered sheet of homogenised tobacco, or a gathered sheet comprising a nicotine salt and an aerosol former.
  • the opening in the hollow tubular portion provides an internal passageway for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article.
  • the opening preferably extends through the entire length of the hollow tubular support element, in the longitudinal direction of the aerosol-generating article. This can allow aerosol to pass unimpeded from the upstream end of the hollow tubular support element to the downstream end of the hollow tubular support element.
  • the cross sectional area of the opening of the hollow tubular support element does not change along the entire length of the opening.
  • the projections reside along the entire length of the hollow tubular support element. That is, the at least one projection extends into the opening along the entire length of the opening. This may help to ease the manufacture of the hollow tubular support element.
  • the cross sectional area of the opening of the hollow tubular support element changes along the length of the opening.
  • the opening of the hollow tubular support element may taper, such that it has a smaller cross sectional area at one end of the hollow tubular support element.
  • the projections may only reside along a certain longitudinal part or parts of the hollow tubular support element.
  • the projections may not reside at the downstream end of the hollow tubular support element, but instead reside at the upstream end of the hollow tubular support element.
  • the at least one projection extends into the opening at least at the upstream end portion of the hollow tubular support element. More preferably, the at least one projection extends into the opening at least at the upstream end face of the hollow tubular support element. This could enable the opening of the hollow tubular support element to have a more conventional shape (such as a circular shape) at its downstream end, whilst still benefiting from the advantages provided by the at least one projection, described above.
  • the length of the opening is measured in the longitudinal direction of the aerosol generating article.
  • the opening may only extend partially along the length of the hollow tubular support element. That is, the opening may extend from the upstream end of the hollow tubular support element to a point within the hollow tubular support element that is between the upstream and downstream ends of the hollow tubular support element.
  • the section of the hollow tubular support element that is disposed downstream of the opening is preferably porous. This can allow aerosol to continue to flow from the downstream end of the opening towards the mouth end of the article.
  • the at least one projection may have any suitable profile as viewed from the upstream end of the hollow tubular support element.
  • the opening can have a perimeter as viewed from the upstream end of the hollow tubular support element.
  • each projection is delimited by a first portion of the perimeter and an imaginary straight line that intersects each end of the first portion of the perimeter.
  • the distance between the imaginary straight line and the point on the first portion of the perimeter furthest from the imaginary straight line, in a direction perpendicular to the imaginary straight line is at least about 1 millimetre, more preferably, at least about 2 millimetres.
  • Each projection may therefore have straight or curved side portions, as viewed from the upstream end of the hollow tubular support element.
  • Each projection may have a pointed or rounded tip, as viewed from the upstream end of the hollow tubular support element.
  • the upstream end of the hollow tubular support element is the end which abuts the aerosol-forming substrate.
  • the shape of the opening has at least one degree of bilateral symmetry as viewed from the upstream end of the hollow tubular support element.
  • the shape of the opening has radial symmetry as viewed from the upstream end of the hollow tubular support element.
  • the hollow tubular support element may have only one projection. This can reduce the complexity of manufacturing the hollow tubular support element.
  • the hollow tubular support element comprises two or more projections that inwardly project into the opening.
  • two or more of the projections are uniformly disposed around the opening.
  • the hollow tubular support element may comprise two projections diametrically opposed around the opening.
  • the hollow tubular support element may comprise three projections disposed around the opening, with each projection being disposed at the tip of an imaginary equilateral triangle, as viewed from the upstream end of the hollow tubular support element. This uniform distribution can enhance the effectiveness of the projections providing a barrier for the aerosol-forming substrate, whilst also allowing for a suitably sized opening for aerosol to flow.
  • the hollow tubular support element of the first aspect of the present invention acts to provide a support barrier for the aerosol-forming substrate, because the support element has one or more projections that extend inwardly into its opening. It is known to heat articles having an aerosol-forming substrate in the form of a cylindrical rod, with an aerosol-generating device having a heater blade. The heater blade is inserted into the rod during use. In such arrangements, it is normally desirable for the heater blade to be located centrally within the rod to optimise its interaction with the aerosol-forming material. Accordingly, it preferably for the one or more projections of the present invention to extend into the opening to a location close to the centre of the hollow tubular support element.
  • At least one of the projections extends towards the radial centre of the hollow tubular support element.
  • the tip of at least one projection is located from the radial centre of the hollow tubular support element by a distance of less than 40 percent, more preferably less than 30 percent, even more preferably less than 23 percent of the radius of the hollow tubular support element. It will be appreciated that this covers at least the following three sets of embodiments. Firstly, it covers embodiments where the projection does not extent through the radial centre of the hollow tubular support element. Secondly, it covers embodiments where the tip of the projection resides at the radial centre of the hollow tubular support element.
  • the tip of at least one projection is located from the radial centre of the hollow tubular support element by a distance of less than 20 percent of the radius of the hollow tubular support element.
  • the first aspect of the present invention involves an appreciation that there is an advantage of having material of the hollow tubular support element reside at, or close to, the radial centre of the hollow tubular support element. This is because such material can provide a support barrier for the aerosol-forming substrate.
  • the first aspect of the present invention achieves this advantage by having one or more projection of material extend inwardly into the opening of the hollow tubular support element.
  • the present disclosure also recognises that this advantage may be achieved without a tipped projection per se, but instead by having at least some material of the hollow tubular support element extend through the radial centre of the hollow tubular support element, whilst still retaining one or more openings in the hollow tubular support element for aerosol to flow through.
  • an aerosol-generating article comprises an aerosol-forming substrate in the form of a rod comprising a gathered sheet of aerosol-forming material; and a hollow tubular support element disposed immediately downstream of the aerosol-forming substrate.
  • the hollow tubular support element comprises: a peripheral portion of material that extends around the periphery of the hollow tubular support element; and an inner portion of material that extends from at least a first point on the peripheral portion to at least a second point on the peripheral portion through the radial centre of the hollow tubular support element.
  • the peripheral and inner portions together define at least two openings in the hollow tubular support element for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article.
  • hollow tubular support element of the second aspect of the invention could be considered similar to a hollow tubular support element of the first aspect of the invention, where two or more projections have joined or merged together to form a bridge of material passing through the radial centre of the hollow tubular support element.
  • 'radial centre' refers to the central point in a cross section of the hollow tubular support element, as taken orthogonally to the longitudinal direction of the hollow tubular support element.
  • the cross section is taken at a point along which the projection or inner portion of material resides. This point is preferably the upstream end of the hollow tubular support element.
  • the second aspect of the invention can therefore benefit from many of the advantages and preferred features described above in relation to the first aspect of the invention.
  • the inner portion of material of the hollow tubular support element can advantageously act as a support barrier for the aerosol-forming substrate.
  • the at least two openings defined in the empty space between the inner and peripheral portion of material of the hollow tubular support element can ensure that support element can still have a suitably low resistance to draw. They can also ensure that the support element can still have a suitably low filtration effect.
  • the second aspect of the present invention provides an aerosol-generating article having improved consistency over known aerosol-generating articles, whilst also benefiting from some of the desired properties of such articles.
  • the hollow tubular support element is formed from a fibrous filtration material. Therefore, there is provided an aerosol-generating article comprising: an aerosol-forming substrate in the form of a rod comprising a gathered sheet of aerosol-forming material; and a hollow tubular support element disposed immediately downstream of the aerosol-forming substrate, the hollow tubular support element being formed from a fibrous filtration material.
  • the hollow tubular support element comprises: a peripheral portion of material that extends around the periphery of the hollow tubular support element; and an inner portion of material that extends from at least a first point on the peripheral portion to at least a second point on the peripheral portion through the radial centre of the hollow tubular support element.
  • the peripheral and inner portions together define at least two openings in the hollow tubular support element for aerosol to flow from the aerosol-forming substrate towards the mouth end of the article
  • the support element may provide a number of advantages, particularly in the context of aerosol-generating articles which are heated by virtue of a heater that is inserted into an aerosol-forming substrate portion of the article.
  • the inner portion of material of the hollow tubular support element can be elastically deformable and therefore able to deform slightly as a heater element, such as a heater blade is inserted into the aerosol-generating article. This can help to reduce the likelihood of damage being caused to the heater element by the inner portion, as the heater element is inserted into the aerosol-generating article.
  • a support element having such an elastically deformable inner portion can therefore provide an optimal balance between preventing major damage or alteration to the aerosol-forming substrate, whilst also avoiding damaging the heater element of an aerosol-generating device.
  • the peripheral portion can be substantially annular shaped.
  • it can be in the form of an annular shaped tube of filtration material, similar to the shape of hollow tubular support elements known in the art.
  • the inner portion of material can have the form of one or more bars which extend across the space within the peripheral portion, with at least one bar extending through the radial centre of the hollow tubular support element.
  • the inner portion may consist of a single bar extending across the space within the peripheral portion and through the radial centre of the hollow tubular support element.
  • the inner portion and peripheral portion define two openings in the empty space between their edges. Each opening may have a semi-circular shape, as viewed from the upstream end of the hollow tubular support element.
  • the inner portion may consist of two bars, each extending across the space within the peripheral portion and through the radial centre of the hollow tubular support element.
  • the inner portion and peripheral portion define four openings in the empty space between their edges. If the two bars are orthogonal to one another, each opening may have a quadrant shape, as viewed from the upstream end of the hollow tubular support element.
  • the inner portion may not have a distinct bar shape, as viewed from the upstream end of the hollow tubular support element.
  • the hollow tubular support element may have two or more elliptical shaped openings, with the inner portion and peripheral portions together providing the material that surrounds said elliptical shaped openings.
  • the elliptical shaped openings may be circular shaped openings.
  • the at least two openings in the hollow tubular support element of the second aspect of the invention may have one or more of the features described above in relation to the first aspect of the invention.
  • the cross sectional area or areas of the at least two openings of the hollow tubular support element do not change along the entire length of the hollow tubular support element.
  • the inner portion of material resides along the entire length of the hollow tubular support element. This may help to ease the manufacture of the hollow tubular support element.
  • the cross sectional area or areas of the at least two openings of the hollow tubular support element may change along the length of the opening.
  • the each or all of the openings of the hollow tubular support element may taper, such that they have a smaller cross sectional area at one end of the hollow tubular support element.
  • the inner portion of material resides at least at the upstream end portion of the hollow tubular support element. More preferably, the inner portion of material resides at least at the upstream end face of the hollow tubular support element. This could enable the opening of the hollow tubular support element to have a more conventional shape (such as a circular shape) at its downstream end, whilst still benefiting from the advantages provided by the inner portion of material, described above.
  • the hollow tubular support element of the first or second aspects of the invention is formed from fibrous filtration material.
  • the hollow tubular support element is formed from an elastically deformable material.
  • the fibrous filtration material may comprise cellulose based fibers, such as cellulose acetate fibers.
  • the hollow tubular support element may be understood to be a type of hollow acetate tube.
  • the material of the hollow tubular support element is porous.
  • This can allow aerosol that is formed at the aerosol forming substrate to also pass through the material of the hollow tubular support element as it flows towards the mouth end of the article.
  • a porous structure can mean that the hollow tubular support element can contribute a very low amount or substantially no resistance to draw (RTD).
  • RTD resistance to draw
  • a porous hollow tubular support element having the structure of the first or second aspects of the present invention can therefore advantageously ensure that there is a sufficient barrier for the aerosol-forming substrate, whilst also ensuring that aerosol can largely flow unimpeded from the aerosol-forming substrate through the support element.
  • the porous structure of the hollow tubular support element can help to enhance the amount of aerosol that is delivered to a consumer.
  • the hollow tubular support element may therefore have resistance to draw of less than about 0.1 mm H 2 O per millimetre length, more preferably less than about 0.05 mm H 2 O per millimetre length, and even more preferably less than about 0.01 mm H 2 O per millimetre length.
  • a plasticiser may be added to the fibrous filtration material to adjust the elastic properties of the hollow tubular support element.
  • plasticisers include triacetin, and triethylenglycol diacetate.
  • a plasticiser is included in the hollow tubular support element, preferably the plasticiser is included in an amount of from about 13 percent weight to about 25 percent weight of the total weight of the hollow tubular support element.
  • the hollow tubular support element has a length in the longitudinal direction of the mouthpiece of from about 4 millimetres to about 26 millimetres, more preferably about 6 millimetres to about 21 millimetres, most preferably about 8 millimeters.
  • the aerosol generating article preferably comprises a filter segment.
  • the filter segment is located at the mouth end of the rod.
  • the filter segment is in the form of a plug.
  • the filter segment comprise fibres.
  • the fibres of the filter segment comprise cellulose acetate.
  • the filter segment has a resistance to draw of from about 0.4 mm H 2 O to about 3 mm H 2 O per millimetre length.
  • the aerosol-generating article has a total resistance to draw of from about 0.6 mm H 2 O to about 1.5 mm H 2 O per millimetre length, more preferably of from about 0.8 mm H 2 O to about 1.2 mm H 2 O per millimetre length.
  • An aerosol-cooling element may be located downstream of the aerosol-forming substrate, for example an aerosol-cooling element may be located immediately downstream of a support element, and may abut the support element.
  • 'aerosol-cooling element' refers to a component of an aerosol-generating article located downstream of the aerosol-forming substrate such that, in use, an aerosol formed by volatile compounds released from the aerosol-forming substrate passes through and is cooled by the aerosol cooling element before being inhaled by a user.
  • the aerosol-cooling element is positioned between the aerosol-forming substrate and the mouthpiece.
  • An aerosol cooling element has a large surface area, but causes a low pressure drop. Filters and other mouthpieces that produce a high pressure drop, for example filters formed from bundles of fibres, are not considered to be aerosol-cooling elements. Chambers and cavities within an aerosol-generating article are not considered to be aerosol cooling elements.
  • 'rod' is used to denote a generally cylindrical element of substantially circular, oval or elliptical cross-section.
  • the plurality of longitudinally extending channels may be defined by a sheet material that has been crimped, pleated, gathered or folded to form the channels.
  • the plurality of longitudinally extending channels may be defined by a single sheet that has been pleated, gathered or folded to form multiple channels. The sheet may also have been crimped.
  • the plurality of longitudinally extending channels may be defined by multiple sheets that have been crimped, pleated, gathered or folded to form multiple channels.
  • 'sheet' denotes a laminar element having a width and length substantially greater than the thickness thereof.
  • 'longitudinal direction' refers to a direction extending along, or parallel to, the cylindrical axis of a rod.
  • 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.
  • the aerosol-generating article may not have an aerosol-cooling element.
  • the filter segment may be located immediately downstream of the aerosol-forming substrate, or immediately downstream of the support element (if present).
  • a cavity may be provided in the aerosol-generating article between the filter segment and the aerosol-forming substrate, or between the filter segment and the support element (if present). The cavity preferably extends from the aerosol-generating substrate to the filter segment, or from the support element (if present) to the filter segment.
  • the aerosol-cooling element may have a total surface area of between approximately 300 square millimetres per millimetre length and approximately 1000 square millimetres per millimetre length. In a preferred embodiment, the aerosol-cooling element has a total surface area of approximately 500 square millimetres per millimetre length. In some embodiments, the aerosol-cooling element may have a substantially circular cross-section and a diameter of about 5 mm to about 10 mm. For example, an aerosol-cooling element may have a diameter of about 7 mm.
  • the aerosol-cooling element may be alternatively termed a heat exchanger.
  • the aerosol-cooling element preferably has a low resistance to draw. That is, the aerosol-cooling element preferably offers a low resistance to the passage of air through the aerosol-generating article. Preferably, the aerosol-cooling element does not substantially affect the resistance to draw of the aerosol-generating article.
  • the aerosol-cooling element may comprise a plurality of longitudinally extending channels.
  • the plurality of longitudinally extending channels may be defined by a sheet material that has been one or more of crimped, pleated, gathered and folded to form the channels.
  • the plurality of longitudinally extending channels may be defined by a single sheet that has been one or more of crimped, pleated, gathered and folded to form multiple channels.
  • the plurality of longitudinally extending channels may be defined by multiple sheets that have been one or more of crimped, pleated, gathered and folded to form multiple channels.
  • the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of metallic foil, polymeric material, and substantially non-porous paper or cardboard.
  • the aerosol-cooling element may comprise a gathered sheet of material selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminium foil.
  • the aerosol-cooling element comprises a gathered sheet of biodegradable material.
  • a gathered sheet of non-porous paper or a gathered sheet of biodegradable polymeric material such as polylactic acid or a grade of Mater-Bi ® (a commercially available family of starch based copolyesters).
  • the aerosol-cooling element comprises a gathered sheet of polylactic acid.
  • the aerosol-cooling element may be formed from a gathered sheet of material having a specific surface area of between approximately 10 square millimetres per milligram and approximately 100 square millimetres per milligram weight. In some embodiments, the aerosol-cooling element may be formed from a gathered sheet of material having a specific surface area of approximately 35 mm2/mg.
  • the aerosol-generating article of the present invention comprises an aerosol-forming substrate.
  • the term 'aerosol-forming substrate' relates to a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate.
  • An aerosol-forming substrate may be adsorbed, coated, impregnated or otherwise loaded onto a carrier or support.
  • An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.
  • the aerosol-generating article of the present invention may be configured for use with an aerosol-generating device.
  • an 'aerosol-generating device' relates to a device that interacts with an aerosol-forming substrate to generate an aerosol.
  • the aerosol-forming substrate comprises plant material and an aerosol former.
  • the plant material is a plant material comprising an alkaloid, more preferably a plant material comprising nicotine, and more preferably a tobacco-containing material.
  • the aerosol-forming substrate comprises at least 70 percent of plant material, more preferably at least 90 percent of plant material by weight on a dry weight basis.
  • the aerosol-forming substrate comprises less than 95 percent of plant material by weight on a dry weight basis, such as from 90 to 95 percent of plant material by weight on a dry weight basis.
  • the aerosol-forming substrate comprises at least 5 percent of aerosol former, more preferably at least 10 percent of aerosol former by weight on a dry weight basis.
  • the aerosol-forming substrate comprises less than 30 percent of aerosol former by weight on a dry weight basis, such as from 5 to 30 percent of aerosol former by weight on a dry weight basis.
  • the aerosol-forming substrate comprises plant material and an aerosol former, wherein the substrate has an aerosol former content of between 5% and 30% by weight on a dry weight basis.
  • the plant material is preferably a plant material comprising an alkaloid, more preferably a plant material comprising nicotine, and more preferably a tobacco-containing material.
  • Alkaloids are a class of naturally occurring nitrogen-containing organic compounds. Alkaloids are found mostly in plants, but are also found in bacteria, fungi and animals. Examples of alkaloids include, but are not limited to, caffeine, nicotine, theobromine, atropine and tubocurarine. A preferred alkaloid is nicotine, which may be found in tobacco.
  • An aerosol-forming substrate may comprise nicotine.
  • An aerosol-forming substrate may comprise tobacco, for example may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the aerosol-forming substrate upon heating.
  • an aerosol-forming substrate may comprise homogenised tobacco material, for example cast leaf tobacco.
  • the aerosol-forming substrate may comprise both solid and liquid components.
  • the aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the substrate upon heating.
  • the aerosol-forming substrate may comprise a non-tobacco material.
  • the aerosol-forming substrate may further comprise an aerosol former. Examples of suitable aerosol formers are glycerine and propylene glycol.
  • the aerosol-forming substrate may comprise a textured sheet of homogenised tobacco material with an aerosol former content of between 5% and 30% by weight on a dry weight basis.
  • a textured sheet of homogenised tobacco material may advantageously facilitate gathering of the sheet of homogenised tobacco material to form the aerosol-forming substrate.
  • the term 'crimped sheet' denotes a sheet having a plurality of substantially parallel ridges or corrugations.
  • the substantially parallel ridges or corrugations extend along or parallel to the longitudinal axis of the aerosol-generating article. This advantageously facilitates gathering of the crimped sheet of homogenised tobacco material to form the aerosol-forming substrate.
  • crimped sheets of homogenised tobacco material for inclusion in the aerosol-generating article may alternatively or in addition have a plurality of substantially parallel ridges or corrugations that are disposed at an acute or obtuse angle to the longitudinal axis of the aerosol-generating article when the aerosol-generating article has been assembled.
  • the aerosol-forming substrate may be in the form of a plug comprising an aerosol-forming material circumscribed by a paper or other wrapper. Where an aerosol-forming substrate is in the form of a plug, the entire plug including any wrapper is considered to be the aerosol-forming substrate.
  • the aerosol-forming substrate of the present invention preferably comprises an aerosol former.
  • an aerosol former As used herein, the term 'aerosol former' is used to describe any suitable known compound or mixture of compounds that, in use, facilitates formation of an aerosol and that is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.
  • Suitable aerosol-formers include, but are not limited to: polyhydric alcohols, such as propylene glycol, triethylene glycol, 1,3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol and, most preferred, glycerine.
  • the aerosol-forming substrate may comprise a single aerosol former.
  • the aerosol-forming substrate may comprise a combination of two or more aerosol formers.
  • the aerosol-forming substrate is in the form of a rod comprising a gathered sheet of aerosol-forming material, for example a gathered sheet of homogenised tobacco, or a gathered sheet comprising a nicotine salt and an aerosol former.
  • Aerosol-forming substrates comprising gathered sheets of homogenised tobacco for use in the aerosol-generating article may be made by methods known in the art, for example the methods disclosed in WO 2012/164009 A2 .
  • the aerosol-forming substrate has an external diameter of at least 5 mm.
  • the aerosol-forming substrate may have an external diameter of between approximately 5 mm and approximately 12 mm, for example of between approximately 5 mm and approximately 10 mm or of between approximately 6 mm and approximately 8 mm.
  • the aerosol-forming substrate has an external diameter of 7.2 mm +/-10%.
  • the aerosol-forming substrate may have a length of between approximately 5 mm and approximately 15 mm, for example between about 8 mm and about 12 mm. In one embodiment, the aerosol-forming substrate may have a length of approximately 10 mm. In a preferred embodiment, the aerosol-forming substrate has a length of approximately 12 mm. Preferably, the aerosol-forming substrate is substantially cylindrical.
  • upstream and downstream refer to relative positions of elements of the smoking article or mouthpiece described in relation to the direction of mainstream smoke as it is drawn from the aerosol generating substrate and through the filter or mouthpiece.
  • the term “longitudinal” refers to a direction parallel to the length of the aerosol-generating article.
  • Aerosol-generating articles according to the present invention may be filter cigarettes or other smoking articles in which an aerosol-generating substrate comprises a tobacco material that is combusted to form smoke. Therefore, in any of the embodiments described above, the aerosol-generating substrate may comprise a tobacco rod. Furthermore, in any of the embodiments described above, the mouthpiece, if present, may be a filter. In such embodiments, the filter may be secured to the tobacco rod by a tipping paper.
  • aerosol-generating articles according to the present invention may preferably be articles in which a tobacco material is heated to form an aerosol, rather than combusted.
  • a tobacco material is heated by one or more electrical heating elements to produce an aerosol.
  • the four elements are arranged sequentially and in coaxial alignment and are assembled by a cigarette paper 6 to form a rod.
  • the rod has a mouth-end 7, which a user inserts into his or her mouth during use, and a distal end 8 located at the opposite end of the rod to the mouth end 7. Elements located between the mouth-end 7 and the distal end 8 can be described as being upstream of the mouth-end 7 or, alternatively, downstream of the distal end 8.
  • the rod is 52 millimetres long and has a diameter of 7.2 millimetres.
  • the filter segment 105 has a length of 8 millimetres and the aerosol-cooling element 104 has a length of 17 millimetres.
  • Figure 2 illustrates an aerosol-generating article 10 according to a first embodiment of the present invention.
  • the article differs from the prior art article 1 of Figure 1 , in that two portions of the hollow tubular support element 3 of Figure 2 inwardly projects into the opening 25 to define two internal projections 26. These projections 26 provide a support barrier for at least part of the aerosol-forming substrate 2.
  • the hollow tubular support element 3 and its projections 26 can be best seen from the exploded view of Figure 3 .
  • Figure 4A show cross-sectional views of the upstream end face of the hollow tubular support element 3 of Figure 3 .
  • the projections 26 help to ensure that additional material resides close to the radial centre 251 of the hollow tubular support element 3. This helps to provide a support barrier to reduce the likelihood of aerosol forming material being pushed into the opening of the support element 3, when a heating blade is inserted into the aerosol forming substrate 2. The opening helps to ensure that sufficient aerosol can pass unimpeded through the support element 3.
  • the opening 25 has a perimeter 255 as viewed from the upstream end face of the hollow tubular support element 3.
  • Each projection 26 of the hollow tubular support element 3 is delimited by a first portion of the perimeter and an imaginary straight line 262 that interests each end of the first portion of the perimeter.
  • the distance 265 between the straight line 262 and the point on the first portion of the perimeter furthest from the straight line in a direction perpendicular to the straight line corresponds to the 'height' 265 of the projection 26.
  • Figure 6 shows a cross-sectional view of the upstream end face of a hollow tubular support element according to a second embodiment of the present invention.
  • the hollow tubular support element 3 comprises: a peripheral portion of material 61 that extends around the periphery of the hollow tubular support element 3, and an inner portion of material 62.
  • the inner portion 62 extends from at least a first point on the peripheral portion 61 to at least a second point on the peripheral portion 61 through the radial centre 251 of the hollow tubular support element 3.
  • the peripheral and inner portions together define two openings 25 in the hollow tubular support element 3 for aerosol to flow from the aerosol-forming substrate 2 towards the mouth end of the article.
  • the inner portion 62 consists of a single bar extending across the space within the peripheral portion 61 and through the radial centre of the hollow tubular support element.
  • the inner portion and peripheral portion define two openings in the empty space between their edges. Each opening has a semi-circular shape, as viewed from the upstream end of the hollow tubular support element.
  • Figure 7 shows a cross-sectional view of the upstream end face of a hollow tubular support element according to a third embodiment of the present invention.
  • the third embodiment differs from the second embodiment, in that the inner portion 62 of the hollow tube now consists of two bars, each extending across the space within the peripheral portion 61 and through the radial centre 251 of the hollow tubular support element 3.
  • the inner portion and peripheral portion define four openings 25 in the empty space between their edges.
  • the two bars of the inner portion 62 are orthogonal to one another, such that each opening 25 has a quadrant shape, as viewed from the upstream end of the hollow tubular support element 3.
  • Figure 8 shows a cross-sectional view of the upstream end face of a hollow tubular support element according to a fourth embodiment of the present invention.
  • the fourth embodiment differs from the second and third embodiment, in that the inner portion 62 does not have a distinct bar shape, as viewed from the upstream end of the hollow tubular support element 3.
  • the hollow tubular support element 3 has three elliptical shaped openings 25, with the inner portion 62 and peripheral portions 61 together providing the material that surrounds said elliptical shaped openings 25.
  • the elliptical shaped openings 25 in this embodiment are circular shaped.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Nozzles (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Claims (15)

  1. Article de génération d'aérosol (10) comprenant :
    un substrat formant aérosol (2) ; et
    un élément de support tubulaire creux (3) disposé immédiatement en aval du substrat formant aérosol (2), l'élément de support tubulaire creux (3) comprenant une matière de filtration fibreuse,
    dans lequel l'élément de support tubulaire creux (3) définit une ouverture (25) pour l'écoulement de l'aérosol depuis le substrat formant aérosol (2) vers l'extrémité buccale de l'article, et
    dans lequel au moins une partie de la matière de l'élément de support tubulaire creux (3) fait saillie vers l'intérieur dans l'ouverture (25) pour définir une ou plusieurs saillies internes (26) .
  2. Article de génération d'aérosol (10) selon la revendication 1, dans lequel l'ouverture (25) s'étend sur toute la longueur de l'élément de support tubulaire creux (3).
  3. Article de génération d'aérosol selon la revendication 1 ou la revendication 2, dans lequel l'au moins une saillie (26) s'étend dans l'ouverture (25) au moins au niveau de la partie d'extrémité amont de l'élément de support tubulaire creux (3).
  4. Article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, dans lequel l'élément de support tubulaire creux (3) comprend deux saillies (26) ou plus qui font saillie vers l'intérieur dans l'ouverture (25), lesdites deux saillies (26) ou plus étant disposées uniformément autour de l'ouverture (25) .
  5. Article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, dans lequel la pointe d'au moins une saillie (26) est située à partir du centre radial de l'élément de support tubulaire creux (3) sur une distance inférieure à 23 pour cent du rayon de l'élément de support tubulaire creux (3).
  6. Article de génération d'aérosol (10) selon la revendication 5, dans lequel la pointe d'au moins une desdites saillies (26) se trouve au niveau du centre radial de l'élément de support tubulaire creux (3).
  7. Article de génération d'aérosol (10) selon la revendication 5, dans lequel au moins une desdites saillies (26) s'étend sur le centre radial de l'élément de support tubulaire creux (3), et la pointe de ladite saillie (26) s'étend au-delà du centre radial de l'élément de support tubulaire creux (3) sur une distance inférieure à 23 pour cent du rayon de l'élément de support tubulaire creux (3) .
  8. Article de génération d'aérosol (10) comprenant :
    un substrat formant aérosol (2) sous la forme d'une tige ; et
    un élément de support tubulaire creux (3) disposé immédiatement en aval du substrat formant aérosol (2), l'élément de support tubulaire creux (3) comprenant une matière de filtration fibreuse,
    dans lequel l'élément de support tubulaire creux (3) comprend :
    une partie périphérique de matière qui s'étend autour de la périphérie de l'élément de support tubulaire creux (3) ; et
    une partie interne de matière (62) qui s'étend depuis au moins un premier point sur la partie périphérique jusqu'à au moins un deuxième point sur la partie périphérique à travers le centre radial de l'élément de support tubulaire creux (3), et
    dans lequel les parties périphérique et interne définissent ensemble au moins deux ouvertures (25) dans l'élément de support tubulaire creux (3) pour l'écoulement de l'aérosol depuis le substrat formant aérosol vers l'extrémité buccale de l'article.
  9. Article de génération d'aérosol (10) selon la revendication 8, dans lequel la partie périphérique de l'élément de support tubulaire creux (3) est de forme sensiblement annulaire.
  10. Article de génération d'aérosol (10) selon la revendication 8 ou la revendication 9, dans lequel la partie intérieure de matière (62) comprend une ou plusieurs barres qui s'étendent à travers l'espace à l'intérieur de la partie périphérique, au moins une barre s'étendant sur le centre radial de l'élément de support tubulaire creux (3).
  11. Article de génération d'aérosol (10) selon l'une quelconque des revendications 8, 9 ou 10, dans lequel la partie intérieure de matière (62) se trouve au moins au niveau de la partie d'extrémité amont de l'élément de support tubulaire creux (3).
  12. Article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, dans lequel l'élément de support tubulaire creux (3) est formé à partir d'une matière élastiquement déformable.
  13. Article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, comprenant en outre un segment de filtre (105) au niveau de l'extrémité buccale de l'article.
  14. Article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, comprenant en outre un élément de refroidissement d'aérosol (104) en aval de l'élément de support tubulaire creux (3).
  15. Système de génération d'aérosol comprenant :
    un article de génération d'aérosol (10) selon l'une quelconque des revendications précédentes, et
    un dispositif de génération d'aérosol comprenant une lame chauffante configurée pour être insérée dans le substrat formant aérosol de l'article de génération d'aérosol.
EP18778485.5A 2017-09-27 2018-09-27 Élément de support pour article de production d'aérosol Active EP3687323B1 (fr)

Applications Claiming Priority (2)

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EP17193498 2017-09-27
PCT/EP2018/076362 WO2019063737A1 (fr) 2017-09-27 2018-09-27 Élément de support pour article de génération d'aérosol

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EP3687323A1 EP3687323A1 (fr) 2020-08-05
EP3687323B1 true EP3687323B1 (fr) 2021-12-01

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US (1) US20200205468A1 (fr)
EP (1) EP3687323B1 (fr)
JP (2) JP2020534834A (fr)
KR (1) KR20200056993A (fr)
CN (1) CN111093402B (fr)
BR (1) BR112020004134A2 (fr)
WO (1) WO2019063737A1 (fr)

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JP2023544739A (ja) * 2020-10-09 2023-10-25 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム 非均質化たばこ基体を有するエアロゾル発生物品
EP4240181B1 (fr) * 2020-12-18 2024-03-20 Philip Morris Products S.A. Article de génération d'aérosol comportant un élément tubulaire creux
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KR102666526B1 (ko) * 2020-12-24 2024-05-16 주식회사 케이티앤지 셀룰로오스 아세테이트 토우, 이를 포함하는 필터 및 상기 필터를 포함하는 에어로졸 생성 물품
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KR20230036303A (ko) * 2021-09-07 2023-03-14 주식회사 케이티앤지 담배 풍미가 향상된 흡연 물품 및 그의 제조 방법
JP7212326B1 (ja) 2021-10-02 2023-01-25 梅爾斯特（広東）生物科技有限公司 ドローレジスタンスレギュレーター及びそのドローレジスタンスレギュレーターの電子タバコのシガレットボム
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CN114847515B (zh) * 2022-06-23 2024-02-02 南通烟滤嘴有限责任公司 一种功能材料棒的制备方法

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WO2019063737A1 (fr) 2019-04-04
KR20200056993A (ko) 2020-05-25
CN111093402A (zh) 2020-05-01
JP2023156434A (ja) 2023-10-24
RU2020113207A (ru) 2021-10-27
CN111093402B (zh) 2023-12-15
EP3687323A1 (fr) 2020-08-05
US20200205468A1 (en) 2020-07-02
BR112020004134A2 (pt) 2020-09-01
RU2020113207A3 (fr) 2021-12-16
JP2020534834A (ja) 2020-12-03

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