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WO2019030272A1 - Article de génération d'aérosol ayant une tige comprenant de multiples feuilles de matériau de tabac - Google Patents

Article de génération d'aérosol ayant une tige comprenant de multiples feuilles de matériau de tabac Download PDF

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Publication number
WO2019030272A1
WO2019030272A1 PCT/EP2018/071483 EP2018071483W WO2019030272A1 WO 2019030272 A1 WO2019030272 A1 WO 2019030272A1 EP 2018071483 W EP2018071483 W EP 2018071483W WO 2019030272 A1 WO2019030272 A1 WO 2019030272A1
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WO
WIPO (PCT)
Prior art keywords
sheets
aerosol
rod
generating article
generating
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/EP2018/071483
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English (en)
Inventor
Reevell TONY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip Morris Products SA
Original Assignee
Philip Morris Products SA
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Filing date
Publication date
Application filed by Philip Morris Products SA filed Critical Philip Morris Products SA
Publication of WO2019030272A1 publication Critical patent/WO2019030272A1/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
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/01—Making cigarettes 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
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices

Definitions

  • the present invention relates to a heated aerosol-generating article comprising a rod of aerosol-generating substrate formed of a plurality of sheets of homogenised tobacco material, and to a method for the production of such a rod of aerosol-generating substrate.
  • Aerosol-generating articles in which an aerosol-generating substrate, such as a tobacco- containing substrate, is heated rather than combusted, are known in the art.
  • an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate or material, which may be located in contact with, within, around, or downstream of the heat source.
  • volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.
  • a number of prior art documents disclose aerosol-generating devices for consuming or smoking heated aerosol-generating articles.
  • Such devices include, for example, electrically heated aerosol-generating devices in which an aerosol is generated by the transfer of heat from one or more electrical heater elements of the aerosol-generating device to the aerosol-generating substrate of a heated aerosol-generating article.
  • electrically heated aerosol-generating devices are that they significantly reduce sidestream smoke.
  • Substrates for heated aerosol-generating articles have, in the past, typically been produced using randomly oriented shreds, strands, or strips of tobacco material.
  • the formation of rods for heated smoking or aerosol-generating articles from shreds of tobacco material suffers from a number of disadvantages.
  • the process of shredding tobacco material undesirably generates tobacco fines and other waste.
  • Rods comprising shreds of tobacco material may exhibit "loose ends", that is, a loss of shreds of tobacco material from the ends of the rods.
  • Rods comprising shreds of tobacco material may exhibit high standard deviations in weight, partially due to the tendency of rods to exhibit loose ends.
  • rods comprising shreds of tobacco material tend to exhibit non-uniform densities, that is, the density along the length of the rod tends to be inconsistent due to variations in the quantity of tobacco material at different locations along the rod.
  • loose ends may disadvantageous ⁇ lead to the need for more frequent cleaning of an aerosol-generating device for use with the aerosol-generating article and of manufacturing equipment.
  • WO-A-2012/164009 discloses rods for heated aerosol- generating articles formed from gathered sheets of tobacco material.
  • the rods disclosed in WO- A-2012/164009 have a longitudinal porosity that allows air to be drawn through the rods. Effectively, folds in the gathered sheets of tobacco material define longitudinal channels through the rod.
  • the use of rods formed from gathered sheets of homogenised tobacco material addresses some of the problems associated with forming an aerosol-generating substrate from shredded tobacco. However, such sheets typically have a relatively low tensile strength and so the gathering of the sheets to form the rods can have drawbacks.
  • a homogenised tobacco rod for an aerosol-generating article which has a consistent tobacco distribution and porosity throughout the rod and which does not require the handling of a continuous web of homogenised tobacco material during production. It would be further desirable to provide such a homogenised tobacco rod that facilitates insertion of the heater into the rod during use. It would be further desirable to provide such a homogenised tobacco rod that optimises the heat transfer from the heater through the tobacco material within the rod. It would be particularly desirable to provide such a homogenised tobacco rod that can be manufactured efficiently and at relatively high speed.
  • a heated aerosol- generating article comprising a rod of aerosol-generating substrate, wherein the rod of aerosol-generating substrate comprises: a plurality of sheets of homogenised tobacco material stacked such that each sheet extends in the longitudinal direction of the aerosol-generating article and such that the sheets are spaced apart from each other in the transverse direction of the aerosol- generating article; and a wrapper circumscribing the plurality of sheets.
  • a method of making a rod for use as an aerosol-generating substrate in an aerosol-generating article comprising the steps of: providing a plurality of continuous sheets of homogenous tobacco material; stacking the plurality of sheets such that each sheet extends in the longitudinal direction and such that the sheets are spaced apart from each other in the transverse direction; circumscribing the stacked sheets with a wrapper to form a continuous rod; and severing the continuous rod into a plurality of discrete rods.
  • a rod for use as an aerosol-generating substrate in an aerosol-generating article comprising: a plurality of sheets of homogenised tobacco material stacked such each sheet extends in the longitudinal direction of the rod and such that the sheets are spaced apart from each other in the transverse direction of the rod; and a wrapper circumscribing the plurality of sheets.
  • the term "heated aerosol-generating article” refers to an aerosol-generating article for producing an aerosol comprising an aerosol-generating substrate that is intended to be heated rather than combusted in order to release volatile compounds that can form an aerosol.
  • aerosol-generating substrate refers to a substrate capable of releasing upon heating volatile compounds, which can form an aerosol.
  • the aerosol generated from aerosol-generating substrates of aerosol-generating articles described herein may be visible or invisible and may include vapours (for example, fine particles of substances, which are in a gaseous state, that are ordinarily liquid or solid at room temperature) as well as gases and liquid droplets of condensed vapours.
  • the term “rod” refers to a generally cylindrical element of substantially polygonal cross-section and preferably of circular, oval or elliptical cross-section.
  • sheet is used herein to refer to a laminar element having a width and length substantially greater than the thickness thereof.
  • the term “web” is used herein to refer to a laminar material having a length that is substantially greater than the width thereof. Typically, the term “web” is used herein to refer to the continuous layer of material from which the sheets are formed.
  • homogenised tobacco material encompasses any tobacco material formed by the agglomeration of particles of tobacco material.
  • Sheets or webs of homogenised tobacco material are formed by agglomerating particulate tobacco obtained by grinding or otherwise powdering of one or both of tobacco leaf lamina and tobacco leaf stems.
  • homogenised tobacco material may comprise a minor quantity of one or more of tobacco dust, tobacco fines, and other particulate tobacco by-products formed during the treating, handling and shipping of tobacco.
  • the sheets of homogenised tobacco material may be produced by casting, extrusion, paper making processes or other any other suitable processes known in the art.
  • the term “longitudinal” refers to the direction corresponding to the main longitudinal axis of the aerosol-generating article, which extends between the upstream and downstream ends of the aerosol-generating article. During use, air is drawn through the aerosol- generating article in the longitudinal direction.
  • the term “transverse” refers to the direction that is perpendicular to the longitudinal axis.
  • any reference to the "cross-section" of the aerosol-generating article or a component of the aerosol-generating article refers to the transverse cross-section unless stated otherwise.
  • the term “length” refers to the dimension of a component in the longitudinal direction and the term “width” refers to the dimension of a component in the transverse direction.
  • the term “maximum width” refers to the maximum cross-sectional dimension of a component. For example, in the case of a rod having a circular cross-section, the maximum width correspond to the diameter of the circle.
  • the term “width” refers to the width of the sheet when it is laid flat, irrespective of the spatial orientation of the sheet within the aerosol-generating article.
  • the term "stacked" refers to the arrangement of the plurality of sheets one over another.
  • the "stacked" sheets are arranged one over another with .
  • stacked encompasses arrangements of sheets in which adjacent sheets are at least partially in contact with each other so that the sheets are spaced apart in some areas whilst in other areas the spacing between the adjacent sheets may approach zero.
  • stacked is used herein irrespective of the orientation of the stacked sheets.
  • upstream and downstream describe the relative positions of elements, or portions of elements, of the aerosol-generating article in relation to the direction in which the aerosol is transported through the aerosol-generating article during use.
  • the aerosol-generating article of the present invention incorporates a rod formed of a plurality of tobacco-containing sheets that extend longitudinally along the rod and that are stacked transversely such that adjacent sheets are spaced apart.
  • the regular arrangement of the plurality of sheets advantageously provides the rod with a consistent tobacco distribution and resistance to draw.
  • the resistance to draw of the rod can be readily controlled through the adjustment of the spacing of the sheets and the thickness of the sheets.
  • the regular arrangement of the plurality of sheets can also optimise heat transfer from a heater element that is in contact with the rod during use through the rod.
  • the arrangement of the sheets with transverse spacing between adjacent sheets may facilitate the insertion of a heater element, such as a heater blade, into the rod.
  • aerosol-generating substrates comprising sheets of homogenised tobacco material advantageously significantly reduce the risk of "loose ends" compared to an aerosol-generating substrate comprising shreds of tobacco material.
  • the problems associated with loose ends, as described above, are therefore minimised.
  • Aerosol-generating substrates comprising sheets of homogenised tobacco material also advantageously exhibit significantly lower weight standard deviations than aerosol-generating substrate comprising shreds of tobacco material.
  • the weight of an aerosol-generating substrate comprising stacked sheets of homogenised tobacco material is determined by the number, density, spacing, width and thickness of the sheets.
  • the weight of aerosol-generating substrates comprising a plurality of sheets of homogenised tobacco material can thus be regulated by controlling the density and dimensions of the sheets of homogenised tobacco material and the arrangement of sheets within the rod.
  • Aerosol-generating substrates comprising a plurality of sheets of homogenised tobacco material also advantageously exhibit more uniform densities than aerosol-generating substrates comprising shreds of tobacco material. Insertion and withdrawal of a heater element of an aerosol-generating device into an aerosol-generating substrate comprising shreds of tobacco may tend to dislodge shreds of tobacco material from the aerosol-generating substrate. This can disadvantageously result in the need for more frequent cleaning of the heater element and other parts of the aerosol-generating device in order to remove the dislodged shreds. In contrast, insertion and withdrawal of a heater element of an aerosol-generating device into an aerosol-generating substrate comprising a plurality of sheets of homogenised tobacco material advantageously does not tend to dislodge tobacco material. This is particularly true for embodiments in which the majority of the sheets extend substantially the full length of the rod, as described below.
  • the rod of the aerosol-generating articles of the present invention can be made in a continuous process which can be efficiently carried out at high speed and can be conveniently incorporated into existing production lines for the manufacture of heated smoking articles.
  • Aerosol-generating articles according to the present invention are suitable for use in an aerosol-generating system comprising an electrically heated aerosol-generating device having an intemal heater element for heating the aerosol-generating substrate.
  • aerosol-generating articles according to the invention find particular application in aerosol-generating systems comprising an electrically heated aerosol-generating device having an intemal heater blade which is adapted to be inserted into the rod of aerosol-generating substrate. Aerosol- generating articles of this type are described in the prior art, for example, in European patent application EP-A-0 822 670.
  • aerosol-generating device refers to a device comprising a heater element that interacts with the aerosol-generating substrate of the aerosol-generating article to generate an aerosol.
  • aerosol-generating article according to the invention may comprise a combustible carbon heat source for heating the aerosol-generating substrate during use.
  • Aerosol-generating articles of this type are described in the prior art, for example, in International patent application WO-A-2009/022232.
  • each sheet is arranged such that the plane of the sheet extends longitudinally along the aerosol-generating article.
  • at least 80 percent of the plurality of sheets extends substantially the entire length of the rod, more preferably at least 90 percent of the plurality of sheets and more preferably at least 95 percent of the plurality of sheets.
  • each of the plurality of sheets extends substantially the entire length of the rod.
  • a sheet that extends substantially the entire length of the rod extends substantially all of the way between the upstream end and the downstream end of the rod.
  • Such a sheet therefore preferably has a length corresponding to the length of the rod to within about 5 percent, preferably to within about 2 percent and most preferably to within about 0.5 percent.
  • Such an arrangement of sheets, wherein the majority of the sheets extend substantially the full length of the rod ensures that the ends of the sheets substantially coincide with the ends of the rod. This leads to a more uniform arrangement, with a minimal number of ends within the rod.
  • this provides better control over the resistance to draw of the rod and therefore the aerosol delivery.
  • the number of loose ends is also reduced compared to a rod formed of shreds of tobacco.
  • the relative widths of the plurality of sheets may be varied in order to provide varying arrangements of the stacked sheets.
  • at least two of the sheets may have a different width to each other.
  • the stack of sheets may comprise alternating sheets of two different widths.
  • the relative widths of the plurality of sheets are varied to adapt to the cross-sectional shape of the rod, such that the width of each sheet substantially corresponds to the width of the rod at the position of that sheet.
  • Each sheet is therefore able to extend between opposite edges of the rod.
  • substantially all of the sheets within the rod have at least two points of contact with the wrapper.
  • the plurality of sheets are arranged substantially parallel to each other.
  • This arrangement provides a substantially constant transverse spacing of the sheets along the length of the rod, which advantageously provides a substantially uniform tobacco density. The effect of this may be to improve heat transfer from the heater element through the rod during use.
  • the plurality of sheets have a substantially constant width.
  • the arrangement of sheets may include a central sheet which is provided at the midpoint of the rod and is substantially planar since the width of the central sheets is substantially the same as the width of the rod at that position. Moving away from the central sheet in either transverse direction, a progressively greater distortion of each sheet will be required as the width of the rod decreases.
  • the necessary distortion of the sheets may be achieved through curvature of the sheets. For example, in one preferred embodiment, each sheet is curved away from the central sheet, with the curvature increasing with increasing distance from the central sheet.
  • Such an arrangement may facilitate the insertion of a heater element into the rod, since the curved sheets can be more readily pushed outwards as the heater element is inserted centrally into the rod.
  • a heater element may be readily inserted into the space between the central sheet and the adjacent curved sheet.
  • the curvature of the sheets may depend on the elasticity and the ductility of the homogenised tobacco material forming the sheets.
  • the sheets may be pre-formed into a curved shape prior to being stacked in the rod.
  • the attachment of the sheets to the wrapper can help to maintain their shape. ? _
  • the distortion of the sheets may be achieved through folding or crimping of each sheet, as described in more detail below.
  • one or more sheets within the plurality of sheets may be substantially planar, or flat.
  • the planar sheets are substantially parallel to the longitudinal axis of the aerosol-generating article.
  • one or more sheets within the plurality of sheets may be curved in the cross-sectional plane.
  • the required distortion of the sheets may be achieved by means of the curvature of the sheets.
  • the rod may incorporate only planar sheets, only curved sheets, or a mixture of planar and curved sheets.
  • At least half of the sheets and preferably all of the sheets extend across the full width of the rod at the respective position of the sheet, such that the ends of each sheet are positioned at the outside of the stack of sheets.
  • This provides the rod with a stable structure since the sheets can be effectively braced against the wrapper and optionally adhered to the inner surface of the wrapper, in order to retain the sheets in position within the rod.
  • the plurality of sheets within the rod are spaced apart in the transverse direction to enable the flow of air through the rod during use.
  • the transverse spacing between adjacent sheets may be adapted in order to provide the desired level of air flow and therefore the desired resistance to draw (RTD) of the rod.
  • the spacing between adjacent sheets may be substantially constant throughout the rod.
  • the spacing between adjacent sheets may differ between different sheets in the rod.
  • the spacing between adjacent sheets may differ throughout the rod in an arrangement of sheets in which the sheets have a differing curvature to each other.
  • the transverse spacing may be substantially constant across the width of the rod, for example, where adjacent sheets are substantially parallel to each other.
  • the spacing between a pair of adjacent sheets may vary across the width of the rod, for example, where adjacent sheets are provided with a different curvature to each other.
  • the spacing between adjacent sheets may approach zero at certain positions across the width of the rod such that the sheets are not spaced apart across the full width of the rod.
  • the spacing of a pair of adjacent sheets is substantially constant along the length of the rod.
  • the spacing between adjacent sheets may be maintained by incorporating one or more spacer elements between the sheets, at positions across the width of the rod.
  • one or more spacer elements may be incorporated between adjacent sheets to keep adjacent sheets apart from each other.
  • the arrangement of ⁇ the one or more spacer elements is such that sufficient space is still retained between adjacent sheets to enable air flow through the rod during use.
  • the sheets are spaced apart from each other in a transverse direction by at least about 10 microns, more preferably at least about 20 microns and most preferably at least about 50 microns.
  • the sheets are preferably spaced apart from each other in a transverse direction by no more than about 300 microns, more preferably no more than about 200 microns and most preferably no more than about 150 microns.
  • the sheets may be spaced apart from each other in a transverse direction by between about 10 microns and about 300 microns, more preferably by between about 20 microns and about 200 microns and most preferably by between about 50 microns and about 150 microns.
  • the number of sheets within the rod can be varied depending on the thickness of the sheets and the cross-sectional dimensions of the rod.
  • the rod comprises between 20 and 350 sheets.
  • the thickness of each sheet is at least about 25 microns more preferably at least about 40 microns and most preferably at least about 80 microns.
  • the thickness of each sheet is preferably no more than about 300 microns, more preferably no more than about 200 microns and most preferably no more than about 150 microns.
  • the thickness of each sheet may be between about 25 microns and about 300 microns, more preferably by between about 40 microns and about 200 microns and most preferably by between about 80 microns and about 150 microns.
  • the plurality of sheets may all have substantially the same thickness as each other.
  • the plurality of sheets may include sheets of at least two different thicknesses.
  • the sheets have a weight of at least about 25 grams per square meter, more preferably at least about 40 grams per square meter, most preferably at least about 80 grams per square meter.
  • the sheets preferably have a weight of no more than about 300 grams per square meter, more preferably no more than about 200 grams per square meter and most preferably no more than about 150 grams per square meter.
  • the weight of the sheets may be between about 25 grams per square meter and about 300 grams per square meter, more preferably between about 40 grams per square meter and about 200 grams per square meter and most preferably between about 80 grams per square meter and about 150 grams per square meter.
  • the plurality of sheets may all have substantially the same weight as each other.
  • the plurality of sheets may include sheets of at least two different weights.
  • Each sheet may comprise a single layer of homogenous tobacco material.
  • one or more of the sheets may be a multilayer sheet formed of a plurality of overlying layers of homogenous tobacco material.
  • a web of homogenous tobacco material may be folded back on itself one or more times to form a multilayer sheet.
  • At least one of the plurality of sheets forming the rod may be textured over at least a part of its surface.
  • textured refers to a sheet that has been crimped, embossed, debossed, perforated or otherwise locally deformed.
  • at least one of the sheets may comprise a plurality of spaced- apart indentations, protrusions, perforations or a combination thereof. Texture may be provided on one side of each sheet, or on both sides each sheet
  • At least one of the sheets is crimped.
  • the term "crimped" 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.
  • the inclusion of one or more crimped sheets may help to retain the spacing between adjacent sheets within the rod.
  • an additive may be applied to at least a part of a surface of at least one of the plurality of sheets.
  • the additive may be a solid additive, a liquid additive, or a combination of a solid additive and a liquid additive.
  • Suitable solid and liquid additives for use in the invention are known in the art and include, but are not limited to: flavourants, such as for example menthol; adsorbents, such as for example activated carbon; fillers, such as for example calcium carbonate and botanical additives.
  • the plurality of sheets forming the rod of aerosol-generating articles according to the invention are formed of a homogenous tobacco material, which preferably comprises particulate tobacco obtained by grinding or otherwise comminuting tobacco leaf lamina.
  • the plurality of sheets may all have substantially the same composition as each other. Alternatively, the plurality of sheets may include sheets of at least two different compositions.
  • Sheets of homogenised tobacco material for use in the invention may have a tobacco content of at least about 40 percent by weight on a dry weight basis, more preferably of at least about 50 percent by weight on a dry weight basis more preferably at least about 70 percent by weight on a dry weight basis and most preferably at least about 90 percent by weight on a dry weight basis.
  • Sheets of homogenised tobacco material for use in the aerosol-generating substrate may comprise one or more intrinsic binders, that is tobacco endogenous binders, one or more extrinsic binders, that is tobacco exogenous binders, or a combination thereof to help agglomerate the particulate tobacco.
  • sheets of homogenised tobacco material for use in the aerosol-generating substrate may comprise other additives including, but not limited to, tobacco and non-tobacco fibres, aerosol-formers, humectants, plasticisers, flavourants, fillers, aqueous and non-aqueous solvents and combinations thereof.
  • Suitable extrinsic binders for inclusion in sheets of homogenised tobacco material for use in the aerosol-generating substrate include, but are not limited to: gums such as, for example, guar gum, xanthan gum, arabic gum and locust bean gum; cellulosic binders such as, for example, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl cellulose; polysaccharides such as, for example, starches, organic acids, such as alginic acid, conjugate base salts of organic acids, such as sodium- alginate, agar and pectins; and combinations thereof.
  • gums such as, for example, guar gum, xanthan gum, arabic gum and locust bean gum
  • cellulosic binders such as, for example, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl cellulose
  • non-tobacco fibres for inclusion in sheets of homogenised tobacco material for use in the aerosol-generating substrate include, but are not limited to: cellulose fibers; soft-wood fibres; hard-wood fibres; jute fibres and combinations thereof.
  • non-tobacco fibres Prior to inclusion in sheets of homogenised tobacco material for use in the aerosol-generating substrate, non-tobacco fibres may be treated by suitable processes known in the art including, but not limited to: mechanical pulping; refining; chemical pulping; bleaching; sulfate pulping; and combinations thereof.
  • the sheets of homogenised tobacco material comprise an aerosol former.
  • aerosol former describes 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.
  • polyhydric alcohols such as propylene glycol, triethylene glycol, 1 ,3-butanediol and glycerine
  • esters of polyhydric alcohols such as glycerol mono-, di- or triacetate
  • 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 sheets of homogenised tobacco material may comprise a single aerosol former.
  • the sheets of homogenised tobacco material may comprise a combination of two or more aerosol formers.
  • the sheets of homogenised tobacco material have an aerosol former content of greater than 5 percent on a dry weight basis.
  • the sheets of homogenised tobacco material may have an aerosol former content of between approximately 5 percent and approximately 30 percent on a dry weight basis.
  • the sheets of homogenised tobacco material have an aerosol former content of approximately 20 percent on a dry weight basis.
  • Sheets of homogenised tobacco for use in the aerosol-generating article of the present invention may be made by methods known in the art, for example the methods disclosed in International patent application WO-A-2012/164009 A2.
  • sheets of homogenised tobacco material for use in the aerosol-generating article are formed from a slurry comprising particulate tobacco, guar gum, cellulose fibres and glycerine by a casting process.
  • the rod of aerosol-generating substrate preferably has an external diameter that is approximately equal to the external diameter of the aerosol-generating article.
  • the rod of aerosol-generating substrate has an external diameter of at least 5 millimetres.
  • the rod of aerosol-generating substrate may have an external diameter of between about 5 millimetres and about 12 millimetres, for example of between about 5 millimetres and about 10 millimetres or of between about 6 millimetres and about 8 millimetres.
  • the rod of aerosol-generating substrate has an external diameter of 7.2 millimetres, to within 10 percent.
  • the rod of aerosol-generating substrate may have a length of between about 7 millimetres and about 15 mm. In one embodiment, the rod of aerosol-generating substrate may have a length of about 10 millimetres. In a preferred embodiment, the rod of aerosol-generating substrate has a length of about 12 millimetres.
  • the rod of aerosol-generating substrate has a substantially uniform cross- section along the length of the rod.
  • the rod of aerosol-generating substrate has a substantially circular cross-section.
  • the plurality of sheets forming the rod of aerosol-generating substrate are circumscribed by a wrapper.
  • the wrapper may be formed of a porous or non-porous sheet material.
  • the wrapper may be formed of any suitable material or combination of materials.
  • the wrapper is a paper wrapper.
  • the wrapper may optionally be adhered to the outer edges of the plurality of sheets.
  • at least one of the inner surface of the wrapper and the outer edges of the plurality of sheets may be wetted during the production process such that the inner wrapper adheres to the edges of the sheets during the wrapping process.
  • an adhesive may be applied to at least one of the inner surface of the wrapper and the outer edges of the plurality of sheets upstream of the wrapping step. The adhesion of the plurality of sheets and the wrapper may advantageously help to retain the position and spacing of the plurality of sheets within the rod.
  • the resistance to draw (RTD) of the aerosol-generating article after insertion of the heater element is preferably between about 80 mm WG and about 140 mm WG, more preferably between about 100 mm WG and about 120 mm WG.
  • resistance to draw is expressed with the units of pressure 'mm WG' or 'mm of water gauge' and is measured in accordance with ISO 6565:2002.
  • the resistance to draw (RTD) of the rod of aerosol-generating substrate is preferably between about 50 mm WG and about 80 mm WG.
  • the RTD of the rod of aerosol-generating substrate is between about 5 mm WG and about 8 mm WG per millimetre length of the rod.
  • the RTD of the rod may be adapted by varying the arrangement of the plurality of sheets, for example, the thickness of the sheets or the spacing of the sheets, or both.
  • aerosol-generating articles according to the invention preferably comprise one or more elements in addition to the rod of aerosol-generating substrate, wherein the rod and the one or more elements are assembled within a substrate wrapper.
  • aerosol-generating articles according to the invention may further comprise at least one of: a mouthpiece, an aerosol- cooling element and a support element such as a hollow acetate tube.
  • an aerosol-generating article comprises, in linear sequential arrangement, a rod of aerosol-generating substrate as described above, a support element located immediately downstream of the aerosol-generating substrate, an aerosol-cooling element located downstream of the support element, and an outer wrapper circumscribing the rod, the support element and the aerosol-cooling element.
  • the rods of aerosol-generating substrate for use in aerosol-generating articles according to the invention may be produced using a method according to the second aspect of the invention, as defined above.
  • a first step of the method according to the invention a plurality of continuous sheets of homogenous tobacco material are provided.
  • the plurality of sheets are stacked such that each sheet extends in the longitudinal direction and such that the sheets are spaced apart from each other in the transverse direction.
  • the stacked sheets are circumscribed by a wrapper to form a continuous rod and in a fourth step, the continuous rod is severed into a plurality of discrete rods.
  • the term “longitudinal” refers to the longitudinal axis of the continuous rod, which typically also corresponds to the direction of travel of the continuous sheets and the continuous rod through the apparatus.
  • the term “transverse” refers to the direction perpendicular to the longitudinal direction.
  • the step of providing a plurality of continuous sheets comprises providing a single continuous web of homogenous tobacco material and cutting the continuous web longitudinally at a plurality of positions across the width of the sheet to form the plurality of continuous sheets for forming the rod.
  • the sheets will initially still be in the same plane, which corresponds to the plane of the web.
  • the process of stacking the plurality of continuous sheets must therefore include bringing the continuous sheets together to provide the sheets one on top of each other, with spacing between adjacent sheets.
  • the distance over which the plurality of sheets must be brought together into a stack is maximised in order to minimise any distortion of the sheets during transport.
  • some or each of the plurality of sheets may be from a separate source of the tobacco material.
  • the plurality of sheets may be continuously fed from a plurality of reels and brought together from the plurality of reels to form the stack of sheets.
  • the different materials may be continuously fed from two or more separate reels and then subsequently combined to form the rod.
  • the plurality of continuous sheets may be fed through a converging funnel to provide a predetermined cross-section of the continuous rod.
  • the stack of sheets is shaped in order to provide the desired shape or size, or both shape and size of the final rod.
  • Such a shaping step may be particularly important for producing rods in which the sheets have varying widths and need to be curved to form the rod, as described above.
  • Methods according to the invention may further comprise the step of texturing the continuous sheets of homogenised tobacco material, or the continuous web of homogenous tobacco material, prior to the stacking step.
  • sheets of homogenised tobacco material for use in the present invention may be crimped using a crimping unit of the type described in Swiss patent application CH-A-691 156, which comprises a pair of rotatable crimping rollers.
  • sheets of homogenised tobacco material for use in the invention may be textured using other suitable machinery and processes that deform or perforate the sheets.
  • methods according to the invention may further comprise the step of applying one or more additives to the continuous sheets of homogenous tobacco material, or the continuous web of homogenous material, prior to the stacking step.
  • steps of circumscribing the plurality of sheets with the wrapper to form a continuous rod and severing the continuous rod to form discrete rods may be carried out using existing apparatus and techniques known to the skilled person.
  • Figure 1 shows a schematic longitudinal cross-sectional view of an aerosol-generating article for use with an aerosol-generating device comprising a heater element;
  • Figure 2 shows a schematic perspective view of an aerosol-generating substrate according to a first embodiment of the invention, with the wrapper removed;
  • Figure 3 shows a schematic perspective view of the aerosol-generating substrate of Figure
  • Figure 4 shows a schematic perspective view of an aerosol-generating substrate according to a second embodiment of the invention, with the wrapper removed;
  • Figure 5 shows a schematic perspective view of the aerosol-generating substrate of Figure 4, with the wrapper in place; and _ _
  • Figure 6 shows a schematic longitudinal cross-sectional view of an aerosol-generating system comprising an electrically operated aerosol-generating device and the aerosol-generating article shown in Figure 1.
  • the aerosol-generating article 10 shown in Figure 1 comprises a rod of aerosol-generating substrate 12, a hollow cellulose acetate tube 14, a spacer element 16 and a mouthpiece filter 18. These four elements are arranged sequentially and in coaxial alignment and are circumscribed by a substrate wrapper 20 to form the aerosol-generating article 10.
  • the aerosol-generating article 10 has a mouth end 22 and a distal end 24 located at the opposite end of the article to the mouth end 22.
  • the aerosol-generating article 10 shown in Figure 1 is particularly suitable for use with an electrically operated aerosol-generating device comprising a heater for heating the rod of aerosol-generating substrate.
  • the rod of aerosol-generating substrate 12 has a length of approximately 12 millimetres and a diameter of approximately 7 millimetres.
  • the rod 12 is cylindrical in shape and has a substantially circular cross-section.
  • a first embodiment of a rod of aerosol-generating substrate 12 for use in the aerosol-generating article 10 of Figure 1 is shown in Figures 2 and 3.
  • the rod 12 comprises a plurality of sheets of homogenised tobacco material 30 circumscribed by a paper wrapper 32.
  • the plurality of sheets 30 are shown with the wrapper 32 removed.
  • each of the plurality of sheets 30 extends in a longitudinal direction along the full length of the rod 12.
  • the sheets 30 are spaced apart from each other in the transverse direction.
  • Each of the sheets 30 has a thickness of approximately 120 microns.
  • the rod contains approximately 30 sheets.
  • each of the sheets 30 substantially corresponds to the diameter of the rod 10.
  • the central sheet 34 is arranged substantially flat across the diameter of the rod whilst the remaining sheets 30 are curved in order to accommodate the decreasing width of the rod 12 above and below the central sheet 34.
  • the curvature of the sheets 30 increases with increasing distance from the central sheet 34 and as shown in Figure 2, the curvature of the outer sheets 36 substantially corresponds to the circumference of the rod 12. As shown in Figure 3, the edges of each sheet are proximate the inner surface of the wrapper 32.
  • FIGs 4 and 5 A second embodiment of a rod of aerosol-generating substrate 112 for use in the aerosol-generating article 10 of Figure 1 is shown in Figures 4 and 5.
  • the rod 112 comprises a plurality of sheets of homogenised tobacco material 130 circumscribed by a paper wrapper 132.
  • the plurality of sheets 130 are shown with the wrapper 132 removed.
  • each of the plurality of sheets 130 extends in a longitudinal direction along the full length of the rod 112.
  • the sheets 130 are spaced apart from each other in the transverse direction.
  • the sheets 130 are substantially _ _ flat and arranged substantially parallel to each other. The transverse spacing between adjacent sheets is substantially constant throughout the rod 112.
  • Each of the sheets 130 has a thickness of approximately 120 microns and adjacent sheets are spaced apart by approximately 120 microns.
  • the rod contains approximately 30 sheets.
  • each of the sheets 130 substantially corresponds to the width of the rod 112 at the position of that sheet, such that the sheets 130 are of varying widths.
  • the width of the central sheet 134 substantially corresponds to the diameter of the rod 1 12 and the width of the sheets 130 decreases with increasing distance from the central sheet 134 in order to match the circular cross-section of the rod. As shown in Figure 5, the edges of each sheet are proximate the inner wrapper 32.
  • Figure 6 shows a portion of an electrically operated aerosol-generating system 200 that utilises a heater blade 210 to heat the rod of aerosol-generating substrate 12 of the aerosol- generating article 10 shown in Figure 1.
  • the heater blade 210 is mounted within an aerosol- generating article chamber within a housing of an electrically operated aerosol-generating device 212.
  • the aerosol-generating device 212 defines a plurality of air holes 214 for allowing air to flow to the aerosol-generating article 10, as illustrated by the arrows in Figure 6.
  • the aerosol- generating device 212 comprises a power supply and electronics, which are not shown in Figure 6.
  • the aerosol-generating article 10 shown in Figure 1 is designed to engage with the aerosol-generating device 212 shown in Figure 6 in order to be consumed.
  • the user inserts the aerosol-generating article 10 into the aerosol-generating device 212 so that the heater blade 210 is inserted into the rod of aerosol-generating substrate 12, between the layers 30 of homogenised tobacco material 30.
  • the mouthpiece filter 18 projects outwards from the mouth end of the device 212.
  • the rod of aerosol-generating substrate 12 is heated by the heater blade 210 to a temperature sufficient to generate an aerosol from the rod of aerosol-generating substrate 12.
  • the aerosol is drawn through the mouth end filter 18.
  • aerosol-generating article 10 shown in Figure 1 may also be suitable for use with other types of aerosol-generating devices.

Landscapes

  • Manufacture Of Tobacco Products (AREA)

Abstract

L'invention concerne un article de génération d'aérosol chauffé (10) comprenant une tige de substrat de génération d'aérosol (12) comprenant : une pluralité de feuilles de matériau de tabac homogénéisé (30, 130) empilées de telle sorte que chaque feuille (30, 130) s'étende dans la direction longitudinale de l'article de génération d'aérosol (10) et de telle sorte que les feuilles soient espacées les unes des autres dans la direction transversale de l'article de génération d'aérosol (10) ; et une enveloppe (32, 132) circonscrivant la pluralité de feuilles (30, 130).
PCT/EP2018/071483 2017-08-09 2018-08-08 Article de génération d'aérosol ayant une tige comprenant de multiples feuilles de matériau de tabac Ceased WO2019030272A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17185616 2017-08-09
EP17185616.4 2017-08-09

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WO2019030272A1 true WO2019030272A1 (fr) 2019-02-14

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3643190A4 (fr) * 2017-06-22 2021-04-14 Japan Tobacco Inc. Segment de génération d'arôme, article de génération d'arôme le comprenant, et système d'inhalation d'arôme
CN113853126A (zh) * 2019-04-08 2021-12-28 菲利普莫里斯生产公司 包含气溶胶生成膜的气溶胶生成基材
CN114729511A (zh) * 2019-11-29 2022-07-08 菲利普莫里斯生产公司 具有双重纸包装物的气溶胶生成基质元件
WO2023275918A1 (fr) * 2021-06-28 2023-01-05 日本たばこ産業株式会社 Procédé de fabrication de cartouche pour aspirateurs d'arôme
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
CN115886321A (zh) * 2021-08-25 2023-04-04 上海烟草集团有限责任公司 一种发烟体
CN116322375A (zh) * 2020-09-21 2023-06-23 日本烟草国际股份有限公司 气溶胶产生制品
WO2023188074A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Appareil de fabrication de tige d'arôme à utiliser pour un article d'inhalation d'arôme de type à chauffage sans combustion et son procédé de fabrication
WO2023188075A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Dispositif de fabrication et procédé de fabrication pour une tige d'arôme utilisée dans un produit d'inhalation d'arôme chauffé non combustible
WO2023188076A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Tige d'arôme utilisée dans un article d'inhalation d'arôme du type à chauffage sans combustion
JP2023544741A (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 通気された空洞及び上流要素を有するエアロゾル発生物品
CN117202800A (zh) * 2021-05-14 2023-12-08 韩国烟草人参公社 气溶胶生成制品以及具有该气溶胶生成制品的气溶胶生成装置
WO2024224496A1 (fr) * 2023-04-26 2024-10-31 日本たばこ産業株式会社 Article de production d'arôme et système à fumer
WO2025003428A1 (fr) * 2023-06-30 2025-01-02 Nicoventures Trading Limited Matériau de génération d'aérosol
EP4337040A4 (fr) * 2021-05-14 2025-04-23 KT & G Corporation Article de génération d'aérosol et dispositif de génération d'aérosol le comprenant

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EP0822670A2 (fr) 1996-08-02 1998-02-04 General Electric Company Génération de séquence pour communication asynchrone à spectre étalé
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WO2009022232A2 (fr) 2007-08-10 2009-02-19 Philip Morris Products S.A. Article à fumer à base de distillation
WO2012164009A2 (fr) 2011-05-31 2012-12-06 Philip Morris Products S.A. Barres destinées à être utilisées dans des articles à fumer
WO2013178766A1 (fr) * 2012-05-31 2013-12-05 Philip Morris Products S.A. Tiges mélangées destinées à être utilisées dans des articles de génération d'aérosol
WO2017068091A1 (fr) * 2015-10-22 2017-04-27 Philip Morris Products S.A. Procédé permettant de fournir une feuille continue de substrat de formation d'aérosol à partir d'une bobine, et article de génération d'aérosol

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EP0822670A2 (fr) 1996-08-02 1998-02-04 General Electric Company Génération de séquence pour communication asynchrone à spectre étalé
CH691156A5 (fr) 1998-05-19 2001-05-15 Philip Morris Prod Ligne d'alimentation d'une machine de production de filtres de cigarettes.
WO2009022232A2 (fr) 2007-08-10 2009-02-19 Philip Morris Products S.A. Article à fumer à base de distillation
WO2012164009A2 (fr) 2011-05-31 2012-12-06 Philip Morris Products S.A. Barres destinées à être utilisées dans des articles à fumer
WO2013178766A1 (fr) * 2012-05-31 2013-12-05 Philip Morris Products S.A. Tiges mélangées destinées à être utilisées dans des articles de génération d'aérosol
WO2017068091A1 (fr) * 2015-10-22 2017-04-27 Philip Morris Products S.A. Procédé permettant de fournir une feuille continue de substrat de formation d'aérosol à partir d'une bobine, et article de génération d'aérosol

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3643190A4 (fr) * 2017-06-22 2021-04-14 Japan Tobacco Inc. Segment de génération d'arôme, article de génération d'arôme le comprenant, et système d'inhalation d'arôme
CN113853126A (zh) * 2019-04-08 2021-12-28 菲利普莫里斯生产公司 包含气溶胶生成膜的气溶胶生成基材
US12471619B2 (en) 2019-04-08 2025-11-18 Philip Morris Products S.A. Aerosol-generating substrate comprising an aerosol-generating film
CN114729511A (zh) * 2019-11-29 2022-07-08 菲利普莫里斯生产公司 具有双重纸包装物的气溶胶生成基质元件
CN114729511B (zh) * 2019-11-29 2024-03-12 菲利普莫里斯生产公司 具有双重纸包装物的气溶胶生成基质元件
CN116322375A (zh) * 2020-09-21 2023-06-23 日本烟草国际股份有限公司 气溶胶产生制品
JP2023544741A (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 通気された空洞及び上流要素を有するエアロゾル発生物品
EP4337040A4 (fr) * 2021-05-14 2025-04-23 KT & G Corporation Article de génération d'aérosol et dispositif de génération d'aérosol le comprenant
EP4337034A4 (fr) * 2021-05-14 2025-03-26 KT & G Corporation Article de génération d'aérosol et dispositif de génération d'aérosol le comprenant
CN117202800A (zh) * 2021-05-14 2023-12-08 韩国烟草人参公社 气溶胶生成制品以及具有该气溶胶生成制品的气溶胶生成装置
JP7312918B2 (ja) 2021-06-28 2023-07-21 日本たばこ産業株式会社 香味吸引器用のカートリッジの製造方法
JPWO2023275918A1 (fr) * 2021-06-28 2023-01-05
WO2023275918A1 (fr) * 2021-06-28 2023-01-05 日本たばこ産業株式会社 Procédé de fabrication de cartouche pour aspirateurs d'arôme
CN115886321A (zh) * 2021-08-25 2023-04-04 上海烟草集团有限责任公司 一种发烟体
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
JP2023053843A (ja) * 2021-10-02 2023-04-13 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
WO2023188076A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Tige d'arôme utilisée dans un article d'inhalation d'arôme du type à chauffage sans combustion
WO2023188075A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Dispositif de fabrication et procédé de fabrication pour une tige d'arôme utilisée dans un produit d'inhalation d'arôme chauffé non combustible
WO2023188074A1 (fr) * 2022-03-30 2023-10-05 日本たばこ産業株式会社 Appareil de fabrication de tige d'arôme à utiliser pour un article d'inhalation d'arôme de type à chauffage sans combustion et son procédé de fabrication
WO2024224496A1 (fr) * 2023-04-26 2024-10-31 日本たばこ産業株式会社 Article de production d'arôme et système à fumer
WO2025003428A1 (fr) * 2023-06-30 2025-01-02 Nicoventures Trading Limited Matériau de génération d'aérosol

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