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WO2024126663A1 - Article de tabac comprenant un suscepteur pouvant être chauffé par induction, et ensemble comprenant un tel article - Google Patents

Article de tabac comprenant un suscepteur pouvant être chauffé par induction, et ensemble comprenant un tel article Download PDF

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Publication number
WO2024126663A1
WO2024126663A1 PCT/EP2023/085773 EP2023085773W WO2024126663A1 WO 2024126663 A1 WO2024126663 A1 WO 2024126663A1 EP 2023085773 W EP2023085773 W EP 2023085773W WO 2024126663 A1 WO2024126663 A1 WO 2024126663A1
Authority
WO
WIPO (PCT)
Prior art keywords
tobacco
layer
article
humectant
layers
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.)
Ceased
Application number
PCT/EP2023/085773
Other languages
English (en)
Inventor
Christoph Lungenschmied
Jaakko MCEVOY
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.)
JT International SA
Original Assignee
JT International 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 JT International SA filed Critical JT International SA
Publication of WO2024126663A1 publication Critical patent/WO2024126663A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • a tobacco article comprising an inductively heatable susceptor, and assembly comprising such an article
  • the present invention concerns a tobacco article comprising an inductively heatable susceptor.
  • the present invention also concerns an aerosol generating assembly comprising such an article and furthermore comprising an aerosol generating device comprising an induction coil configured to heat the susceptor by induction when the tobacco article is inserted into the aerosol generating device.
  • the tobacco article comprises for example a solid tobacco material able to form aerosol when being heated by the susceptor.
  • the aerosol generating device is configured to operate with the article, also known as a heat-not-burn device, is adapted to heat, rather than burn, the tobacco material, to generate aerosol for inhalation.
  • reduced-risk or modified-risk devices also known as vaporisers
  • vaporisers have grown rapidly in the past few years as an aid to assist habitual smokers wishing to quit smoking traditional tobacco products such as cigarettes, cigars, cigarillos, and rolling tobacco.
  • Various devices and systems are available that heat or warm vaporizable substances as opposed to burning tobacco in conventional tobacco products.
  • a commonly available reduced-risk or modified-risk device is the heated substrate aerosol generation device or heat-not-burn device.
  • Devices of this type generate aerosol or vapour by heating an aerosol substrate comprised in a tobacco article usable with such type of devices.
  • the aerosol substrate typically comprises moist leaf tobacco or other suitable vaporizable material to a temperature typically in the range 150°C to 350°C. Heating an aerosol substrate, but not combusting or burning it, releases aerosol that comprises the components sought by the user but not the toxic and carcinogenic by-products of combustion and burning.
  • the aerosol produced by heating the tobacco or other vaporizable material does not typically comprise the burnt or bitter taste resulting from combustion and burning that can be unpleasant for the user and so the substrate does not therefore require the sugars and other additives that are typically added to such materials to make the smoke and/or vapour more palatable for the user.
  • the heat source when heating the tobacco material with a susceptor embedded inside the tobacco article, the heat source is often very close to the tobacco material. In some cases, parts of the tobacco material close to the susceptor may be heated more than desired, or even may get charred in some specific cases. Such scenario would be contradictory to the benefits of a heat-not-burn device.
  • some portions of the tobacco material may be underutilized for example, because of little amounts of heat transferred to these portions of the tobacco material. This is not efficient in view of an optimal exploitation of the tobacco material.
  • moisture may be driven away from the susceptor when operating, resulting for example in unsightly staining of the wrapping paper.
  • the present invention aims to propose a tobacco article comprising an inductively heatable susceptor for a use with a heat-not-burn device, wherein the tobacco article improves user experience and/or enables more efficient exploitation of the tobacco material comprised in the tobacco article.
  • the invention relates to a tobacco article comprising an inductively heatable susceptor and at least one tobacco layer comprising tobacco material arranged to be heated by the susceptor, the tobacco article further comprising at least one humectant layer comprising a humectant agent, the or each humectant layer being deprived of tobacco material, wherein the or each humectant layer has a first side and a second side opposite to the first side, the second side being in contact with the at least one tobacco layer.
  • the humectant layer allows providing humectant agent to the tobacco material, when the susceptor heats up by induction.
  • the humectant layer leads thus to an uneven distribution of humectant agent inside the tobacco layer.
  • an area of the tobacco layer that is close to the humectant layer may receive more humectant agent than other areas of the tobacco layer.
  • Such uneven distribution of the humectant agent improves user experience and enables more efficient exploitation of the tobacco material comprised in the tobacco article.
  • areas of the tobacco layer having a relatively high temperature when being heated by the susceptor may for example be provided with higher amounts of humectant agent, thus avoiding overheating or even charring of the tobacco material.
  • Other areas of the tobacco layer, having a relatively low temperature when being heated by the susceptor may for example be provided with lower amounts of humectant agent or no humectant agent. This allows thus to avoid excess humectant or generation of moisture in these areas, and allows as a consequence efficient utilization of the tobacco material in these areas.
  • the tobacco article ensures an optimal heat transfer from the heat source to the at least one tobacco layer thanks to the susceptor, which is a part of the tobacco article.
  • the susceptor allows transferring heat very efficiently to the at least one tobacco layer, so as to avoid heat wasting or using a large amount of insulators.
  • the susceptor allows improving efficiency of heating compared with a heating element distinct of the tobacco article. For example, such heating element distinct of the tobacco article may be separated from tobacco material at least by a wrapper.
  • the tobacco article is flat-shaped and comprises at least two opposite external flat faces extending substantially parallel to each other.
  • the user experience is further improved, because the two opposite external flat faces extending substantially parallel to each other allow an easy grabbing by a user of the tobacco article, and an easy insertion into an aerosol generating device.
  • the tobacco article comprises at least two tobacco layers, called inner tobacco layer and outer tobacco layer, the inner tobacco layer being arranged between the humectant layer and the outer tobacco layer, wherein at least one of the inner tobacco layer and the outer tobacco layer comprises the humectant agent.
  • the tobacco material of each layer is exploited in an optimal manner.
  • adding the humectant agent to one of the inner tobacco layer and outer tobacco layer allows optimal generation of the aerosol in each layer, depending on different temperatures in these layers. For example, if the humectant agent is added to the tobacco layer which presents a higher temperature, this allows optimal aerosol generation also in this layer, and allows in particular to avoid charring of tobacco material.
  • the inner tobacco layer and the outer tobacco layer each comprise the humectant agent, wherein a weight proportion of the humectant agent in the inner tobacco layer of a total weight of the inner tobacco layer is higher than a weight proportion of the humectant agent in the outer tobacco layer of a total weight of the outer tobacco layer.
  • the tobacco material can be exploited in an optimal manner in each tobacco layer, so as to form aerosol.
  • the different weight proportions of the humectant agent allow taking into account in particular different temperatures of the corresponding tobacco layers, obtaining thus an optimal amount of humectant for the corresponding temperatures in each tobacco layer.
  • the or each inner tobacco layer when being closer to the susceptor than the or each out tobacco layer, presents a higher temperature upon heating by the susceptor, and thus optimal exploitation of the tobacco material may be obtained by a higher humectant agent quantity in the or each inner tobacco layer.
  • the susceptor is a susceptor layer having at least one contact surface, the contact surface being in contact with the tobacco layer or the humectant layer.
  • heat transfer into the tobacco layer is improved. If the contact surface of the susceptor is in contact with the tobacco layer, heat from the susceptor is directly, i.e. without any intermediate elements such as wrapper(s), transferred into the tobacco layer. If the contact surface is in contact with the humectant layer, the heat is transferred from the susceptor via the humectant layer into the tobacco layer, thereby furthermore for example transmitting humectant into the tobacco layer and thus improving the aerosol generation.
  • the contact surface is in contact with the first side of the humectant layer.
  • the susceptor layer has two opposite contact surfaces extending parallel one to another, the tobacco article comprising at least two humectant layers respectively contact with one of the two opposite contact surfaces, the tobacco article furthermore comprising at least two opposite tobacco layers respectively in contact with the second side of one of the humectant layers.
  • the tobacco article comprises at least two inner tobacco layers and at least two outer tobacco layers, wherein one layer of the inner tobacco layers is arranged between one layer of the humectant layers and one layer of the outer tobacco layers, and wherein the other layer of the inner tobacco layers is arranged between the other layer of the humectant layers and the other layer of the outer tobacco layers.
  • the user experience if further improved, because different weight proportions of humectant agent in the corresponding tobacco layers on both sides of the susceptor layer allow obtaining an optimal exploitation of the tobacco material in each layer on both sides of the susceptor layer.
  • the humectant agent is chosen from the group consisting of glycerol, preferably glycerol triacetate, propylene glycol, polyethylene glycol and aloe vera gel.
  • the humectant agent presents optimal characteristics for aerosol generation in a tobacco article having a susceptor and at least one tobacco layer.
  • the or each humectant layer is formed by a gel or a paste.
  • the tobacco article is easy to produce.
  • the humectant layer in form of a gel or a paste may be applied on different parts of the tobacco article, such as for example on the susceptor, and thus allow flexible production of the tobacco article.
  • the tobacco article furthermore comprises a wrapper in contact with the at least one tobacco layer.
  • the tobacco article well-protected.
  • the user experience is improved, because the user may touch the wrapper instead of tobacco material for example, when manipulating the tobacco article.
  • the susceptor comprises, and preferably is made of, a material of the group consisting of mild steel, stainless steel, aluminum, nickel, and iron.
  • the susceptor may comprise, and preferably is made of, alloys containing for example iron and nickel.
  • the susceptor may be made from a single material or from layers of various materials.
  • the susceptor allows producing a given amount of heat by induction, and thus to heat the tobacco material in an energy efficient manner.
  • the invention also relates to an aerosol generating assembly comprising the tobacco article as described above and furthermore comprising an aerosol generating device comprising an induction coil configured to heat the susceptor by induction when the tobacco article is inserted into the aerosol generating device.
  • FIG. 1 is a perspective view of an aerosol generating assembly according to the invention, the aerosol generating assembly comprising an aerosol generating device and a tobacco article;
  • FIG. 1 is a perspective view of the tobacco article of Figure 1 ;
  • FIG. 3 is a cross-sectional view according to plane III of a part of the tobacco article of Figure 2 according to a first embodiment of the tobacco article, when the tobacco article is inserted into the aerosol generating device;
  • FIG. 4 is a cross-sectional view similar to the view of Figure 3 according to a second embodiment of the tobacco article.
  • the term “aerosol generating device” or “device” may include a vaping device configured to deliver an aerosol to a user, including an aerosol for vaping, by activating means for generating an electromagnetic induction, such as induction coil(s), in order to heat a susceptor, as explained in further detail below.
  • the device may be portable. “Portable” may refer to the device being for use when held by a user.
  • the device may be adapted to generate a variable amount of aerosol, e.g. by activating the means for generating an electromagnetic induction for a variable amount of time (as opposed to a metered dose of aerosol), which can be controlled by a trigger.
  • the trigger may be user activated, such as a vaping button and/or inhalation sensor.
  • the inhalation sensor may be sensitive to the strength of inhalation as well as the duration of inhalation to enable a variable amount of vapour to be provided (so as to mimic the effect of smoking a conventional combustible smoking article such as a cigarette, cigar or pipe, etc.).
  • the device may include a temperature regulation control to drive the temperature for example of the heated aerosol generating substance (aerosol pre-cursor) to a specified target temperature and thereafter to maintain the temperature at the target temperature that enables efficient generation of aerosol.
  • aerosol may include a suspension of vaporizable material as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapour. Aerosol may include one or more components of the vaporizable material.
  • vaporizable material may refer to a smokable material which may for example comprise nicotine or tobacco and a vapour forming agent.
  • tobacco may take the form of various materials such as shredded tobacco, granulated tobacco, tobacco leaf and/or reconstituted tobacco.
  • the vaporizable material may also comprise at least one of a gelling agent, a binding agent, a stabilizing agent, and a humectant.
  • humectant agent or “vapour forming agent” or “aerosol forming agent” or “aerosol former” may refer to an agent allowing to provide a given level of solvents to the tobacco material in view of a heating of the tobacco material and the formation of aerosol comprising flavour components and/or nicotine.
  • the humectant agent is able to diffuse, freely or under the effect of heating, from a layer in which it is contained towards a layer comprising the vaporizable material.
  • the humectant agent is able to absorb part of the heat transferred to this layer.
  • the humectant agent may refer to: a polyol such as sorbitol, glycerol, and glycols like propylene glycol, polyethylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, acids such as lactic acid, glycerol derivatives, esters such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerol triacetate, vegetable glycerol, or aloe vera gel.
  • the humectant agent may comprise or consist of glycerol, propylene glycol, or a mixture of glycerol propylene glycol.
  • the humectant agent may also refer to any mixture of the previously cited elements.
  • Figure 1 shows an aerosol generating assembly 10 comprising an aerosol generating device 1 1 , and furthermore comprising a tobacco article 12 inserted into the aerosol generating device 11.
  • the tobacco article 12 is intended to operate with the aerosol generating device 11.
  • An example of the tobacco article 12 is shown in more detail in Figure 2.
  • the aerosol generating device 1 1 comprises a device body 15 extending along a device axis Y.
  • the device body 15 comprises a mouthpiece 16 and a housing 17 arranged successively along the device axis Y.
  • the mouthpiece 16 and the housing 17 form two different pieces.
  • the mouthpiece 16 is designed to be fixed on or be received in an insertion opening formed at one of the ends of the housing 17.
  • the tobacco article 12 can be inserted inside the device 1 1 when the mouthpiece 16 is removed from the housing 17.
  • the tobacco article 12 may be configured for being at least partly inserted into the mouthpiece 16, for example when the mouthpiece 16 is removed from the housing 17.
  • the mouthpiece 16 and the housing 17 form one single piece. In this case, the tobacco article 12 can be inserted inside the device 1 1 for example through a through hole.
  • the mouthpiece 16 may define the through hole adapted to receive at least partially the tobacco article 12. Particularly, the through hole can be adapted to receive at least a mouth end of the tobacco article 12. According to still another embodiment (not-shown), no mouthpiece 16 is provided with the aerosol generating device 11. In this case, the mouth end of the tobacco article 12 can form a mouthpiece designed to be in contact with the user’s lips and/or mouth while a vaping session.
  • the housing 17 delimits an internal space of the device 1 1 receiving various elements designed to carry out different functionalities of the device 1 1.
  • This internal space can for example receive a battery for powering the device 11 , a control module for controlling the operation of the device 11 , a heating chamber configured to receive at least partially the tobacco article 12 in view of heating the tobacco article 12 by induction, as explained in examples further below.
  • the heating chamber may be for example arranged in the extension of the through hole of the mouthpiece 16, according to the device axis Y.
  • the heating chamber may for example present a cup shape.
  • the housing 17 may for example form a substantially rectangular shape with rounded edges.
  • the housing 17 with the mouthpiece 16 may form at least four side walls 20, two of which being visible in Figures 3 and 4 in crosssection.
  • the housing 17 can have a round cross-sectional shape. In this case, it can form with the mouthpiece 17 only one side wall 20.
  • the housing 17 can be formed from a single piece or several assembled pieces made of any suitable material like aluminium or plastic.
  • the material of the housing 17 can be a thermally conductive material. In some other embodiments, it can be a thermally insulating material.
  • the housing 17 can form on the corresponding part of the device side wall 20 one or several openings suitable for arranging control and/or visual elements.
  • such element may comprise control buttons, touch panels, screens, LEDs, etc.
  • the housing 17 forms a slot opening 22 receiving for example a LED indicating at least an ON state of the device 1 1 . It can also indicate for example a battery law state, an error state, etc.
  • the aerosol generating device 11 may further comprise at least one induction coil 24 configured to heat a susceptor 26 (described further in detail below) of the tobacco article 12 by induction when the tobacco article 12 is inserted into the aerosol generating device 11 .
  • Each induction coil 24 may for example be formed by one or more windings extending around the tobacco article 12 or at one side of the tobacco article 12 when the tobacco article 12 is inserted into the device 1 1 .
  • each induction coil 24 may for example be plunged or integrated into the corresponding side wall 20.
  • the aerosol generating device 1 1 may comprise two induction coils 24, wherein one of the coils 24 is integrated into a side wall 20 opposite to the side wall 20 integrating the other coil 24. In this case, for example, the remaining two side walls 20 are deprived of induction coils 24.
  • the or each induction coil 24 may extend inside the heating chamber, in particular between the side walls 20 and the tobacco article 12.
  • the or each induction coil 24 may be in contact with the tobacco article 12 or/and an air space may be formed between the or each induction coil 24 and the tobacco article 12.
  • the tobacco article 12 may be each for example flatshaped.
  • the tobacco article 12 may comprise at least two opposite external flat faces extending substantially parallel to each other.
  • the tobacco article 12 may form a flat-shaped cuboid extending along an article axis X between an abutting end 28 and a mouth end 30.
  • the tobacco article 12 may be adapted to a form and/or size of the heating chamber intended to receive the tobacco article 12.
  • the tobacco article 12 may for example comprise a tobacco part 13A and a nontobacco part 13B.
  • the tobacco part 13A the non-tobacco part 13B may be connected via a connecting section 32.
  • the tobacco part 13A and the non-tobacco part 13B may be fixed to each other at the connecting section 32, for example by an adhesive and/or a mutual wrapper wrapping the parts 13A, 13B together.
  • the tobacco article 12 may have the external dimensions (L1 +L2)xWxD, wherein L1 is the length of the non-tobacco part 13B along the article axis X, L2 is the length of the tobacco part 13A along the article axis X, W is the width of the tobacco article 12, and D is the depth of the tobacco article 12.
  • the width W and depth D of the tobacco article 12 may be substantially equal in the tobacco part 13A and the non-tobacco part 13B.
  • the length L2 of the tobacco part 13A may for example be slightly greater than the length L2 of the non-tobacco part 13B.
  • the length L2 of the tobacco part 13A according to the article axis X may be substantially equal to 18 mm and the length L1 of the non-tobacco part 13B according to the article axis X may be substantially equal to 15 mm.
  • the sum of L1 and L2 is defined as total length L and may be for example be substantially equal to 33 mm while the width W and depth D are for example substantially equal respectively to 12 mm and 1 ,2 mm.
  • the values L, W and D can be selected within a range of +/- 40%, for example.
  • the depth D of the tobacco article 12 is for example formed by a pair of parallel walls 33A, 33B, called hereinafter lateral walls 33A, 33B, and the width W of the tobacco article 12 is formed by a pair of parallel walls 34A, 34B, called hereinafter wider walls 34A, 34B.
  • Each wider wall 34A, 34B is for example at least 5 times, advantageously 10 times, wider than each lateral wall 33A, 33B.
  • the flat shape of the tobacco article 12 is thus defined by the ratio between each wider wall 34A, 34B and each lateral wall 33A, 33B, which is greater than 5, advantageously greater than 10.
  • the edges between the wide and lateral walls 33A, 33B, 34A, 34B can be rounded.
  • the tobacco article 12 can have any other suitable flat shape and/or external dimensions, such as for example a form defining a round cross section, for example a circular or elliptical cross section.
  • the tobacco part 13A may comprise tobacco material and will be described more in detail below.
  • the non-tobacco part 13B may for example comprise a core 35 acting like a filter and/or as a cooler for cooling an aerosol received from the tobacco portion 13A.
  • the core 35 may for example be a foam, or packed strands or fibres.
  • the core 35 may be formed through an extrusion and/or rolling process into a stable shape.
  • the non-tobacco part 13B may be shaped to provide one or more airflow channels.
  • the non- tobacco part 13B may define furthermore a plurality of venting holes (not-shown) arranged along at least one axis perpendicular to the article axis X.
  • venting holes may be aligned perpendicularly to the article axis X on the or each corresponding wall of the non-tobacco part 13B, and can be spaced by a same distance.
  • the venting holes allow fresh air entering inside the non-tobacco part 13B to achieve particular vaping/tasting effects.
  • the non-tobacco part 13B is deprived of tobacco material.
  • the tobacco article 12, in particular the tobacco part 13A, may comprise the inductively heatable susceptor 26, at least one humectant layer 36A, 36B having a first side 37A, 37B and a second side 38A, 38B opposite to the first side 37A, 37B, at least one tobacco layer 39A, 39B comprising tobacco material arranged to be heated by the susceptor 26, and a wrapper 40.
  • inductively heatable susceptor 26 it is understood that the susceptor is adapted to heat up when receiving energy via electromagnetic induction.
  • the susceptor 26 is configured to heat up further to electromagnetic induction generated by the induction coil(s) 24.
  • the susceptor 26 may for example form a susceptor layer having at least one contact surface 42A, 42B, for example two opposite contact surfaces 42A, 42B extending parallel one to another.
  • the susceptor 26, each humectant layer 36A, 36B, each tobacco layer 39A, 39B and the wrapper 40 may form parallel layers.
  • the susceptor 26, each humectant layer 36A, 36B and each tobacco layer 39A, 39B may have a same width and/or length, wherein the length and/or width is/are defined in a plane parallel to planes separating the parallel layers.
  • the wrapper 40 may have a greater width and/or length than the width and/or length of the susceptor 26, each humectant layer 36A, 36B and each tobacco layer 39A, 39B.
  • the humectant layers 36A, 36B and the tobacco layers 39A, 39B have the same cross-section, for example the same width and the same length, in a plane parallel to planes separating the parallel layers.
  • each humectant layer 36A, 36B is in contact with at least one tobacco layer 39A, 39B over an entire outer surface of the respective tobacco layer 39A, 39B.
  • the humectant layers 36A, 36B and the tobacco layers 39A, 39B are superimposed over their entire extension in a plane parallel to planes separating the parallel layers, thus forming a multi-layered material having the same composition along each direction in a plane parallel to planes separating the parallel layers, as shown on Figure 3.
  • the susceptor 26, each humectant layer 36A, 36B and each tobacco layer 39A, 39B may have a same height, wherein the height is in particular defined along a direction perpendicular to the article axis X and in parallel to the lateral walls 33A, 33B of the tobacco article 12. In other words, the height is defined along a direction extending vertically in the view of the tobacco article of figures 3 and 4.
  • the susceptor 26, each humectant layer 36A, 36B and/or each tobacco layer 39A, 39B may have different heights.
  • the susceptor 26 may be formed by a plurality of metallic elements comprised in each tobacco layer 39A, 39B.
  • the tobacco article 12, in particular the tobacco part 13A comprises two humectant layers 36A, 36B, wherein each first side 37A, 37B of these layers is contact with the corresponding contact surface 42A, 42B of the susceptor 26.
  • the tobacco article 12, in particular the tobacco part 13A may furthermore comprise two opposite tobacco layers 39A, 39B respectively in contact with the second side 38A, 38B of one of the humectant layers 36A, 36B.
  • each humectant layer 36A, 36B may be arranged between the susceptor 26 and the corresponding tobacco layer 39A, 39B.
  • each contact surface 42A, 42B may be in contact with the corresponding tobacco layer 39A, 39B.
  • the susceptor 26 forming the susceptor layer may be arranged in the middle of the tobacco article 12 according to an axis perpendicular to the article axis X.
  • Each humectant layer 36A, 36B may be in contact, on one side with the corresponding contact surface 42A, 42B, and on the opposite side with the corresponding tobacco layer 39A, 39B.
  • Each tobacco layer 39A, 39B may be in contact, on one side with the corresponding humectant layer 36A, 36B, and on the opposite side with the wrapper 40.
  • the layers 36A, 36B, 39A, 39B, 40 of the tobacco article 12 may form an axial symmetry having identical layers on both sides of the susceptor 26, wherein the symmetry axis is defined by the susceptor 26, in particular by a central axis extending in parallel and at the same distance from the contact surfaces 42A, 42B.
  • the tobacco article 12, in particular the tobacco part 13A may comprise the layers in the following order, along a direction, called first direction hereafter, perpendicular to the article axis X and in parallel to the lateral walls 33A, 33B of the tobacco article 12: the susceptor 26 forming the susceptor layer, the humectant layer 36A, the tobacco layer 39A, and the wrapper 40.
  • the tobacco article 12, in particular the tobacco part 13A, may further comprise for example, along a second direction parallel and opposite to the first direction, the layers in the following order starting from the same susceptor layer: the humectant layer 36B, the tobacco layer 39B, and the wrapper 40.
  • the susceptor 26 may comprise, and preferably is made of, a material of the group consisting of mild steel, stainless steel, aluminum, nickel, iron and alloys containing for example iron and nickel. According to some examples, the susceptor 26 may be made from a single material or from layers of various materials.
  • the susceptor 26 presents for example a substantially rectangular shape.
  • the susceptor 26 presents a size adapted to a form and/or size of the induction coil 24.
  • the susceptor 26 may be for example configured to provide a temperature substantially equal to or lower than 300°C upon heating by induction.
  • Each contact surface 42A, 42B of the susceptor 26 may be provided with a coating, such as for example a hydrophilic coating, an organic and/or inorganic coating.
  • a coating such as for example a hydrophilic coating, an organic and/or inorganic coating.
  • such coating may form a self-assembled monolayer or SAM.
  • each contact surface 42A, 42B may be provided with a hydroxide layer.
  • each contact surface 42A, 42B may form a surface being roughened by mechanical machining or a surface machined by a laser so as to obtain a given roughness improving contact with the humectant layer 36A, 36B.
  • Each humectant layer 36A, 36B is deprived of tobacco material. By “deprived of tobacco material”, it is understood that no tobacco as defined above is present in the humectant layer 36A, 36B.
  • Each humectant layer 36A, 36B comprises, and preferably may consist of, a humectant agent.
  • the humectant agent may be in particular an agent as defined above.
  • the humectant agent agent is chosen from the group consisting of glycerol, preferably glycerol triacetate, propylene glycol, polyethylene glycol and aloe vera gel.
  • Each humectant layer 36A, 36B may for example be formed by a gel or a paste comprising the humectant agent.
  • each humectant layer 36A, 36B may be applied as a coating on the corresponding contact surface 42A, 42B of the susceptor 26.
  • the susceptor 26 is provided with the hydrophilic coating, the organic and/or inorganic coating, the gel or paste forming the humectant layer 36A, 36B may be applied as an additional coating on the hydrophilic coating, the organic and/or inorganic coating.
  • Each tobacco layer 39A, 39B comprises, and preferably consists of, tobacco material arranged to be heated by the susceptor 26.
  • the tobacco material is in particular tobacco as defined above.
  • Each tobacco layer 39A, 39B may for example define one or a several air channels (non-shown), for example extending along the article axis X.
  • each tobacco layer 39A, 39B may be deprived of air channels.
  • each tobacco layer 39A, 39B may be formed only by tobacco material, which optionally defines the air channel(s).
  • each tobacco layer 39A, 39B may furthermore comprise the humectant agent.
  • the wrapper 40 may be in contact with the at least one tobacco layer 39A, 39B.
  • the wrapper 40 may, for example, comprise paper and/or non-woven fabric.
  • the wrapper 40 may be porous or air impermeable.
  • the wrapper 40 may be waterproof.
  • the wrapper 40 may for example comprise waterproof material or consist of waterproof material, or comprise paper coated with a waterproof coating.
  • the wrapper 40 may form for example a plurality of airflow channels extending inside the tobacco article 12.
  • the wrapper 40 may be formed by a single wrapper paper and/or a single non-woven fabric, forming an outer layer of the tobacco article 12 or at least an outer layer of the tobacco part 13A.
  • the wrapper 40 may be in contact with both tobacco layers 39A, 34B, with reference to Figure 3.
  • the wrapper 40 may also wrap the non-tobacco part 13B, for example with a same paper or sheet, fixing together the tobacco part 13A and the nontobacco part 13B.
  • the wrapper comprises distinct papers or sheets for wrapping respectively the tobacco part 13A and the non-tobacco part 13B.
  • the second embodiment may comprise at least some features, or all features of the first embodiment. The same or similar features are not described again. Identical or similar elements are designated by the same references.
  • the susceptor 26, each humectant layer 36A, 36B, and/or the wrapper 40 may be similar or identical to the first embodiment.
  • the tobacco article 12, in particular the tobacco part 13A, according to the second embodiment comprises at least two tobacco layers, called inner tobacco layer 44A, 44B and outer tobacco layer 46A, 46B, instead of the at least one tobacco layer 39A or 39B of the first embodiment.
  • the or each inner tobacco layer 44A, 44B may be arranged between the corresponding humectant layer 36A, 36B and the corresponding outer tobacco layer 46A, 46B.
  • the tobacco article 12, in particular the tobacco part 13A may comprise two inner tobacco layers 44A, 44B and two outer tobacco layers 46A, 46B.
  • one of the inner tobacco layers 44A may be in contact with one of the outer tobacco layers 46A.
  • the other of the inner tobacco layers 44B may be in contact with the other of the outer tobacco layers 46B.
  • the inner tobacco layer 44A may be arranged between the humectant layer 36A and the outer tobacco layer 46A
  • the inner tobacco layer 44B may be arranged between the humectant layer 36B and the outer tobacco layer 46B.
  • the susceptor 26 may be arranged in the middle of the tobacco article 12.
  • the layers 36A, 36B, 44A, 44B, 46A, 46B, 40 of the tobacco article 12 may form an axial symmetry having the same layers on both sides of the susceptor 26, wherein the symmetry axis is defined by the susceptor 26, in particular by a central axis extending in parallel and at the same distance from the contact surfaces 42A, 42B.
  • the tobacco article 12, in particular the tobacco part 13A may comprise the layers in the following order, along the first direction oriented perpendicular to the article axis X and in parallel to the lateral walls 33A, 33B of the tobacco article 12: the susceptor 26 forming the susceptor layer, the humectant layer 36A, the inner tobacco layer 44A, the outer tobacco layer 46A, and the wrapper 40.
  • the tobacco article 12, in particular the tobacco part 13A may further comprise for example, along the second direction parallel and opposite to the first direction, the layers in the following order starting from the same susceptor layer: the humectant layer 36B, the inner tobacco layer 44B, the outer tobacco layer 46B, and the wrapper 40.
  • the humectant layers 36A, 36B and the inner and outer tobacco layers 44A, 44B, 46A, 46B have the same section, for example the same width and the same length, in a plane parallel to planes separating the parallel layers.
  • each humectant layer 36A, 36B is in contact with one inner tobacco layer 44A, 44B over an entire outer surface of the respective inner tobacco layer.
  • each inner tobacco layer 44A, 44B is in contact with one outer tobacco layer 46A, 46B over an entire outer surface of the respective outer tobacco layer.
  • all the humectant layer 36A, 36B and all the inner and outer tobacco layers 44A, 44B, 46A, 46B are superimposed over their entire extension in a plane parallel to planes separating the parallel layers, thus forming a multi-layered material having the same composition along each direction of a lower or an upper layer in a plane parallel to planes separating the parallel layers, as shown on Figure 4.
  • each of the inner tobacco layers 44A, 44B and the outer tobacco layers 46A, 46B comprises at least some, or all, features of each tobacco layer 39A, 39B of the first embodiment.
  • at least one of the inner tobacco layer 44A, 44B and the outer tobacco layer 46A, 46B may comprise the humectant agent.
  • each inner tobacco layer 44A, 44B and each outer tobacco layer 46A, 46B may comprise the humectant agent.
  • a weight proportion of the humectant agent in each inner tobacco layer 44A, 44B of a total weight of the inner tobacco layer 44A, 44B may be higher than a weight proportion of the humectant agent in the outer tobacco layer 46A, 46B of a total weight of the outer tobacco layer 46A, 46B.
  • the amount of humectant agent per total weight of the layer is higher in each inner tobacco layer 44A, 44B compared with each outer tobacco layer 46A, 46B.
  • this allows in particular taking into account a higher temperature of each inner tobacco layer 44A, 44B in comparison with each outer tobacco layer 46A, 46B, given the higher distance of each outer tobacco layer 46A, 46B to the susceptor 26.

Landscapes

  • Manufacture Of Tobacco Products (AREA)

Abstract

Un article de tabac (12) comprend un suscepteur pouvant être chauffé par induction (26) et au moins une couche de tabac (39A, 39B) comprenant un matériau de tabac conçu pour être chauffé par le suscepteur (26), l'article de tabac (12) comprenant en outre au moins une couche d'humectant (36A, 36B) comprenant un agent humectant, la couche d'humectant (36A, 36B) ou chaque couche d'humectant (36A, 36B) étant dépourvue de matériau de tabac, la couche d'humectant (36A, 36B) ou chaque couche d'humectant (36A, 36B) ayant un premier côté (37A, 37B) et un second côté (38A, 38B) opposé au premier côté (37A, 37B), le second côté (38A, 38B) étant en contact avec ladite couche de tabac (39A, 39B).
PCT/EP2023/085773 2022-12-14 2023-12-14 Article de tabac comprenant un suscepteur pouvant être chauffé par induction, et ensemble comprenant un tel article Ceased WO2024126663A1 (fr)

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EP22213524.6 2022-12-14
EP22213524 2022-12-14

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200323271A1 (en) * 2017-12-29 2020-10-15 Jt International S.A. Inductively Heatable Consumable For Aerosol Generation
US20220183366A1 (en) * 2019-09-06 2022-06-16 Juul Labs, Inc. Cartridge-based heat not burn vaporizer
WO2022243434A2 (fr) * 2021-05-20 2022-11-24 British American Tobacco (Investments) Limited Consommable destiné à être utilisé avec un dispositif de fourniture d'aérosol

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200323271A1 (en) * 2017-12-29 2020-10-15 Jt International S.A. Inductively Heatable Consumable For Aerosol Generation
US20220183366A1 (en) * 2019-09-06 2022-06-16 Juul Labs, Inc. Cartridge-based heat not burn vaporizer
WO2022243434A2 (fr) * 2021-05-20 2022-11-24 British American Tobacco (Investments) Limited Consommable destiné à être utilisé avec un dispositif de fourniture d'aérosol

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