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WO2025181255A1 - Matériaux de génération d'aérosol, articles de génération d'aérosol et extraits et leurs procédés de fabrication - Google Patents

Matériaux de génération d'aérosol, articles de génération d'aérosol et extraits et leurs procédés de fabrication

Info

Publication number
WO2025181255A1
WO2025181255A1 PCT/EP2025/055373 EP2025055373W WO2025181255A1 WO 2025181255 A1 WO2025181255 A1 WO 2025181255A1 EP 2025055373 W EP2025055373 W EP 2025055373W WO 2025181255 A1 WO2025181255 A1 WO 2025181255A1
Authority
WO
WIPO (PCT)
Prior art keywords
aerosol
generating
generating material
extract
preservative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/055373
Other languages
English (en)
Inventor
Walid Abi Aoun
Desmond DALTON
Guilherme GONCALVES CARDOSO
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.)
Nicoventures Trading Ltd
Original Assignee
Nicoventures Trading Ltd
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 Nicoventures Trading Ltd filed Critical Nicoventures Trading Ltd
Publication of WO2025181255A1 publication Critical patent/WO2025181255A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/183—Treatment of tobacco products or tobacco substitutes sterilization, preservation or biological decontamination
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
    • 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

  • Aerosol-generating materials Aerosol-generating materials, aerosol-generating articles, and extracts and methods for making the same
  • the present invention relates to aerosol-generating materials and to articles comprising such materials, for example for use in an aerosol provision system.
  • the invention also relates to aerosol provision systems, and to methods for forming aerosol-generating material. Further, the invention relates to extracts which may be used in said aerosol-generating materials and methods.
  • the invention also relates to cellulosic materials and oral products including the same.
  • Smoking articles such as cigarettes, cigars and the like burn tobacco during use to create tobacco smoke.
  • Alternatives to these types of combustible articles release an inhalable aerosol or vapour by releasing compounds from a substrate material by heating without burning. These may be referred to as non-combustible smoking articles or aerosol generating articles.
  • a heating device which releases compounds by heating, but not burning, a solid aerosolisable material.
  • This solid aerosolisable material may, in some cases, contain a tobacco material.
  • the heating volatilises at least one component of the material, typically forming an inhalable aerosol.
  • These products may be referred to as heat-not-burn devices, tobacco heating devices or tobacco heating products.
  • Various different arrangements for volatilising at least one component of the solid aerosolisable material are known.
  • an aerosolgenerating material comprising a botanical extract, the botanical extract comprising an added preservative to limit microbial growth in the extract before its incorporation in the aerosol-generating material.
  • the preservative comprises one or more selected from the group consisting of: potassium sorbate, sodium benzoate, phenoxyethanol, chlorphenesin, benzyl alcohol, sodium dehydroacetate, caprylyl glycol and hydroxyacetophenone.
  • the preservative is included in the botanical extract in an amount of from about 0.1 to about 1 wt%.
  • the preservative is included in the botanical extract in an amount of from about 0.1 to about 0.4 wt%.
  • the botanical extract comprises an aqueous solvent.
  • the botanical extract comprises a co-solvent in addition to water, optionally selected from the group consisting of: ethanol, glycerol, propylene glycol.
  • the botanical extract is a tobacco extract.
  • the aerosol-generating material comprises the botanical extract with added preservative, a binder, and an aerosol forming material.
  • the aerosol-generating material comprises from about 10 to about 60 wt% of the botanical extract with the added preservative, from about 1 to about 60 wt% binder and from about 5 to about 60 wt% aerosol-former material.
  • the aerosol-generating material comprises from about 30 to about 60 wt% of the botanical extract with the added preservative, from about 1 to about 40 wt% binder and from about 10 to about 30 wt% aerosol-former material.
  • the aerosol-generating material further comprises a filler.
  • the aerosol-generating material comprises from about 5 to about 50 wt% filler.
  • the aerosol-generating material comprises no more than about 0.2 wt% preservative.
  • the aerosol-generating material comprises no more than about 0.15 wt% or no more than about 0.1 wt% preservative. In some embodiments, the aerosol-generating material has a nicotine content of from about 4% to about 5% by weight of the aerosol-generating material.
  • the aerosol-generating material has a water content of no greater than about 10%.
  • the aerosol-generating material is solid and formed from a liquid precursor.
  • the liquid precursor is a gel or a slurry.
  • the liquid precursor is cast, extruded or cross-linked.
  • the aerosol-generating material is in the form of a sheet or film, or in the form of strips or strands.
  • the only preservative included in the aerosol-generating material is the one or more preservative added to the botanical extract to limit microbial growth in the extract before its incorporation in the aerosol-generating material.
  • an aerosol-generating article for use in an aerosol provision system, comprising an aerosol-generating segment comprising the aerosol-generating material according to the first aspect.
  • the aerosol-generating article further comprises a second aerosol-generating composition comprising or consisting of tobacco.
  • a system for heating an aerosol-generating material to volatilise at least one component of the aerosol generating material comprising: an aerosol-generating article according to the second aspect, and an aerosol delivery device for heating the aerosol-generating segment to volatilise at least one component of the aerosol-generating composition.
  • the heating device is configured to externally heat the aerosolgenerating segment, and/or inductively heat the aerosol-generating segment, and/or resistively heat the aerosol-generating segment.
  • a method for forming an aerosol-generating material comprising the steps: taking a botanical extract comprising an added preservative and combining this with a binder, an aerosol former material to form a liquid precursor composition; and solidifying the liquid precursor.
  • the liquid precursor further comprises a filler, optionally to form a slurry or suspension.
  • the liquid precursor composition is cast into a sheet and then dried to form the aerosol-generating material.
  • an aqueous botanical extract comprising a solvent and a preservative, the extract having a microbial content of no more than about 3000 cfu/g.
  • a cellulosic material comprising a botanical extract, the botanical extract comprising an added preservative to limit microbial growth in the extract before its incorporation in the cellulosic material.
  • the cellulosic material is suitable for incorporation in a product configured for oral use.
  • an oral product comprising the cellulosic material according to the sixth aspect.
  • the oral product comprises the cellulosic material held within a cavity defined by a pouch.
  • the cellulosic material is incorporated into sheet material forming a pouch.
  • Figure 1 is a side-on cross-sectional view of an illustrative article for use in an aerosol provision system and comprising an aerosol-generating material according to the present disclosure
  • Figure 2 is a perspective illustration of a non-combustible aerosol provision device for generating aerosol from an article according to the present disclosure.
  • the present invention relates generally to an aerosol-generating material for use in an aerosol-generating article which is configured to heat (but not burn) the composition to generate an aerosol for inhalation.
  • the aerosol-generating material comprises a botanical extract and an added preservative to limit microbial growth in the extract before its incorporation in the aerosol-generating material.
  • preservatives Whilst it is known to include preservatives in aerosol-generating articles to control and limit microbial growth, the preservatives are generally added to liquid components of the aerosol -generating articles and it is not generally considered necessary to add preservatives to solid aerosol-generating materials that are stable and do not exhibit microbial growth during storage.
  • a solid aerosol-generating material is formed from a liquid precursor composition.
  • the added preservative is added to the botanical extract.
  • the preservative is not a solvent or co-solvent used to extract the botanical material. Instead, the preservative is included in addition to the solvent and any co-solvent present in the botanical extract.
  • the purpose of the preservative is to limit or prevent microbial growth in the botanical extract before its incorporation into the aerosol-generating material.
  • preservative is included in the botanical extract in an amount of from about 0.1 to about 1 wt%. In some embodiments, the preservative is included in the botanical extract in an amount of from about 0.1 to about 0.4 wt%. In some embodiments, the preservative is included in the botanical extract in an amount of about 0.2 wt% on a wet weight basis (WWB).
  • WWB wet weight basis
  • the botanical extract is a liquid or solid that has been isolated from a botanical material.
  • the extract may be prepared by processing techniques such as expression (such as juicing or pressing) or solvent extraction.
  • the extract is concentrated and/or purified, for example by distillation.
  • the botanical material is macerated, frequently without heating, to soften and degrade the material prior to extraction.
  • the botanical extract comprises or consists of a tobacco extract.
  • the tobacco extract may be an aqueous extract, obtained by extraction with water.
  • the tobacco extract may be an extract from any suitable tobacco, such as single grades or blends, cut rag or whole leaf, including Virginia and/or Burley and/or Oriental. It may also be an extract from tobacco particle 'fines' or dust, expanded tobacco, stems, expanded stems, and other processed stem materials, such as cut rolled stems.
  • the extract may be obtained from a ground tobacco or a reconstituted tobacco material.
  • the botanical extract comprises at least about 20 wt% of nonaqueous component, which will include the soluble botanical components, as well as any non-water solvent or co-solvent. This may also be referred to as the solids content of the extract, although, for the avoidance of doubt, this is not reference to the presence of solid botanical material.
  • the preservative is added to the botanical extract as soon as the liquid botanical extract is separated from the solid extract botanical material. Whilst it is possible to add the preservative to the solvent before the extraction step, this would require the addition of more preservative as the solution would be very dilute. Additionally, a lot of the preservative may be lost during any subsequent removal of the solvent, for example, during a concentration step via vacuum distillation.
  • the preservative may be added before, during or after these additional steps. It may be preferred to add the preservative to the extract as soon as any concentration step has been completed. As a rule, it may be preferred to add the preservative to the botanical extract before it is stored for any significant length of time, such as for more than about 6 hours, about 12 hours, about 18 hours or more than about 24 hours.
  • the botanical extract is not frozen prior to its incorporation into an aerosol-generating material.
  • the term “botanical material” includes any material derived from plants including, but not limited to, leaves, bark, fibres, stems, roots, seeds, flowers, fruits, pollen, husk, shells or the like. In some embodiments, the term “botanical material” refers to solid plant matter (i.e., part of a plant) and does not encompass a “botanical extract”.
  • Example botanicals are tobacco, eucalyptus, star anise, hemp, cocoa, cannabis, fennel, lemongrass, peppermint, spearmint, rooibos, chamomile, flax, ginger, ginkgo biloba, hazel, hibiscus, laurel, licorice (liquorice), matcha, mate, orange skin, papaya, rose, sage, tea such as green tea or black tea, thyme, clove, cinnamon, coffee, aniseed (anise), basil, bay leaves, cardamom, coriander, cumin, nutmeg, oregano, paprika, rosemary, saffron, lavender, lemon peel, mint, juniper, elderflower, vanilla, Wintergreen, beefsteak plant, curcuma, turmeric, sandalwood, cilantro, bergamot, orange blossom, myrtle, cassis, valerian, pimento, mace, damien, marjoram, olive, lemon
  • the botanical is selected from eucalyptus, star anise, cocoa and hemp.
  • the botanical material comprises leaf material.
  • the botanical material is tobacco material.
  • the botanical extract with added preservative has a microbial content of no more than about 3000 cfu/g. This is referred to herein as the threshold microbial content of the botanical extract.
  • the threshold microbial content is about 2500 cfu/g (that is, the botanical extract has a microbial content of no more than about 2500 cfu/g), about 2000 cfu/g, about 1500 cfu/g, about 1250 cfu/g, about 1000 cfu/g, about 900 cfu/g, about 800 cfu/g, about 700 cfu/g, about 600 cfu/g, about 500 cfu/g, about 400 cfu/g, about 300 cfu/g, about 200 cfu/g, about 100 cfu/g, about 90 cfu/g, about 80 cfu/g, about 70 cfu/g, about 60 cfu/g, about 50 cfu/g, about 40 cfu/g, about 30 cfu/g, about 20 cfu/g, about 15 cfu/g, or about 10 cf
  • the microbial content of the botanical extract with added preservative is measured following a storage period of at least 4 weeks (that is, at least 4 weeks after the botanical extract with added preservative was prepared).
  • the microbial content of the botanical extract with added preservative is measured following a storage period of at least 6 weeks, at least 12 weeks, a storage period of at least 18 weeks, at least 24 weeks, at least 30 weeks, at least 36 weeks, at least 42 weeks, at least 48 weeks, at least 54 weeks, at least 60 weeks, at least 66 weeks, at least 72 weeks, at least 78 weeks, at least 84 weeks, at least 90 weeks, at least 96 weeks, at least 102 weeks, at least 110 weeks or at least 120 weeks.
  • the microbial content of the botanical extract with added preservative is measured at the point at which the botanical extract with added preservative is to be incorporated into an aerosol-generating material.
  • the microbial content of the botanical extract with added preservative increases no more than about 50-fold following a storage period of at least 4 weeks (that is, at least 4 weeks after the "starting" microbial content of the botanical extract with added preservative was measured).
  • the microbial content of the botanical extract with added preservative increases no more than about 50-fold following a storage period of at least 6 weeks, at least 12 weeks, a storage period of at least 18 weeks, at least 24 weeks, at least 30 weeks, at least 36 weeks, at least 42 weeks, at least 48 weeks, at least 54 weeks, at least 60 weeks, at least 66 weeks, at least 72 weeks, at least 78 weeks, at least 84 weeks, at least 90 weeks, at least 96 weeks, at least 102 weeks, at least 110 weeks or at least 120 weeks.
  • the microbial content of the botanical extract with added preservative increases following a storage period of at least 4 weeks no more than about 40-fold, no more than about 35-fold, no more than about 30-fold, no more than about 30-fold, no more than about 30-fold, no more than about 25-fold, no more than about 20-fold, no more than about 15-fold, no more than about 10-fold, no more than about 9-fold, no more than about 8-fold, no more than about 7-fold, no more than about 6-fold, no more than about 5-fold, no more than about 4-fold, no more than about 3-fold, no more than about 2-fold, or by no more than about 95%, by no more than about 90%, by no more than about 85%, by no more than about 80%, by no more than about 75%, by no more than about 70%, by no more than about 65%, by no more than 60%, by no more than about 55%, by no more than about 50%, by no more than about 45%, by no more than 40%, by no more than about 35%, by no more than
  • the aforementioned low levels of increase in microbial content are seen over a storage period of at least 6 weeks, at least 12 weeks, a storage period of at least 18 weeks, at least 24 weeks, at least 30 weeks, at least 36 weeks, at least 42 weeks, at least 48 weeks, at least 54 weeks, at least 60 weeks, at least 66 weeks, at least 72 weeks, at least 78 weeks, at least 84 weeks, at least 90 weeks, at least 96 weeks, at least 102 weeks, at least 110 weeks or at least 120 weeks.
  • Aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way. Aerosol-generating material may, for example, be in the form of a solid, liquid or semi-solid (such as a gel) which may or may not contain an active substance and/or flavourants.
  • the aerosol-generating material may comprise one or more active substances and/or flavours, one or more aerosol-former materials, and optionally one or more other functional material.
  • the aerosol-generating material may comprise a binder, such as a gelling agent, and an aerosol former, in addition to the botanical extract described herein, which optionally comprises a substance to be delivered.
  • a filler may also be present.
  • a solvent such as water, is also present (in addition to the botanical extract) and one or more other components of the aerosol-generating material may or may not be soluble in the solvent.
  • the aerosol-generating material is substantially free from botanical material.
  • the aerosol-generating material is substantially tobacco free.
  • the aerosol-generating film may be discontinuous.
  • the aerosolgenerating film may comprise one or more discrete portions or regions of aerosolgenerating material, such as dots, stripes or lines, which may be supported on a support.
  • the support may be planar or non-planar.
  • the aerosol-generating film may be formed by combining a binder, such as a gelling agent, with a solvent, such as water, an aerosol-former and one or more other components, such as one or more substances to be delivered, to form a slurry and then heating the slurry to volatilise at least some of the solvent to form the aerosolgenerating film.
  • the slurry may be heated to remove at least about 60 wt%, 70 wt%, 80 wt%, 85 wt% or 90 wt% of the solvent.
  • the aerosol-generating material is substantially free from (solid) botanical material.
  • solid botanical material.
  • thin film is substantially free from particles of botanical material having a particle size of greater than about 2 pm.
  • the botanical extract included in the thin film is also substantially free from particles of botanical material having a particle size of greater than about 2 pm.
  • botanical material does not encompass materials such as wood pulp or carboxymethyl cellulose. Rather than being particles of botanical material, these are materials that are extracted or derived from botanical material, for example by chemical processing. Such derivative materials may be included in the thin film as fillers, as discussed elsewhere.
  • the aerosol-generating material is substantially tobacco free. This can mean that the thin film is free from any particles of tobacco material, i.e., particles of tobacco leaf or stem, having a particle size of greater than about 2 pm.
  • substantially free means comprising less than about 1 wt%, less than about 0.5 wt% or about 0 wt%.
  • the aerosol-generating material may comprise from about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 10 wt%, about 15 wt% or about 20 wt%, to about 60 wt%, about 50 wt%, about 40 wt%, about 30 wt%, about 25 wt%, about 20 wt%, about 15 wt%, or about 10 wt% of one or more binders (DWB).
  • the aerosol-generating material may comprise from about 1 to about 40 wt%, from about 2 to about 20 wt% or from about 4 to about 15 wt% of binder (DWB).
  • the aerosol-generating material may comprise from about 1 wt% to about 60 wt% gelling agent, for example from about 1 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%, about 10 wt%, about 15 wt% or about 20 wt%, to about 60 wt%, about 50 wt%, about 40 wt%, about 30 wt%, about 25 wt%, about 20 wt%, about 15 wt%, about 10 wt% of a gelling agent (all calculated on a dry weight basis).
  • the aerosol-generating material may comprise from about 1 to about 30 wt%, from about 2 to about 20 wt% or from about 4 to about 15 wt% of the gelling agent.
  • the gelling agent comprises a hydrocolloid.
  • the gelling agent comprises (or is) one or more compounds selected from polysaccharide gelling agents, such as alginate, pectin, starch or a derivative thereof, cellulose or a derivative thereof, pullulan, carrageenan, agar and agarose; gelatin; gums, such as xanthan gum, guar gum and acacia gum; silica or silicone compounds, such as PDMS and sodium silicate; clays, such as kaolin; and polyvinyl alcohol.
  • polysaccharide gelling agents such as alginate, pectin, starch or a derivative thereof, cellulose or a derivative thereof, pullulan, carrageenan, agar and agarose
  • gelatin such as xanthan gum, guar gum and acacia gum
  • silica or silicone compounds such as PDMS and sodium silicate
  • clays such as kaolin
  • polyvinyl alcohol polyvinyl alcohol
  • the gelling agent comprises (or is) one or more polysaccharide gelling agents.
  • the polysaccharide gelling agent is selected from alginate, pectin, starch or a derivative thereof, or cellulose or a derivative thereof. In some embodiments the polysaccharide gelling agent is selected from alginate and a cellulose derivative.
  • the gelling agent is a polysaccharide gelling agent, optionally wherein the polysaccharide gelling agent is selected from alginate and a cellulose derivative.
  • the alginate is sodium alginate.
  • the polysaccharide gelling agent is a cellulose derivative. Without wishing to be bound by theory, the inventors believe that such gelling agents do not react with calcium ions to form crosslinks.
  • the polysaccharide gelling agent is alginate. In some embodiments the gelling agent is not crosslinked. The absence of crosslinks in the gelling agent facilitates quicker delivery of the botanical constituent, derivative or extract (and any optional additional active substances and/or flavours) from the second aerosol-generating material.
  • the cellulose or derivative thereof is selected from hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose (CMC), hydroxypropyl methylcellulose (HPMC), methyl cellulose, ethyl cellulose, cellulose acetate (CA), cellulose acetate butyrate (CAB), and cellulose acetate propionate (CAP).
  • CMC carboxymethylcellulose
  • HPMC hydroxypropyl methylcellulose
  • CAP cellulose acetate propionate
  • the cellulose derivative is CMC.
  • the gelling agent comprises (or is) one or more of alginate, pectin, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose, pullulan, xanthan gum guar gum, carrageenan, agarose, acacia gum, fumed silica, PDMS, sodium silicate, kaolin and polyvinyl alcohol.
  • the gelling agent comprises (or is) one or more of hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose, guar gum, acacia gum, alginate and/or pectin.
  • the gelling agent comprises (or is) alginate and/or pectin, and may be combined with a setting agent (such as a calcium source) during formation of the thin film.
  • a setting agent such as a calcium source
  • the aerosol-generating material may comprise a calcium- crosslinked alginate and/or a calcium-crosslinked pectin.
  • the gelling agent comprises (or is) alginate, optionally wherein the alginate is present in the aerosol-generating material in an amount of from about 1 to about 10 wt%, for example from about 3 to about 6 wt%, of the aerosolgenerating material (calculated on a dry weight basis).
  • alginate is the only gelling agent present in the thin film.
  • the gelling agent comprises alginate and at least one further gelling agent, such as pectin.
  • the gelling agent is carboxymethylcellulose, optionally wherein the carboxymethylcellulose (CMC) is present in an amount of from about 15 to about 50 wt%, for example from about 20 to about 40 wt% or about 30 wt%. In some embodiments, CMC is the only gelling agent present in the thin film.
  • CMC carboxymethylcellulose
  • the weight ratio of the total amount of gelling agent to the total amount of botanical extract is from about 1 : 1 to about 1 :20, such as from about 1:5 to about 1: 15 or from about 1 : 10 to about 1: 12.
  • the aerosol-generating material may preferably comprise an aerosol-former material.
  • the aerosol-former material may comprise one or more constituents capable of forming an aerosol.
  • the aerosol-generating material may comprise from about 5 wt%, about 10 wt%, about 15%, about 20 wt%, about 25 wt%, about 27 wt% or about 30 wt% to about 60 wt%, about 55 wt%, about 50 wt%, about 45 wt%, about 40 wt%, or about 35 wt% of an aerosol-former material (DWB).
  • the aerosol-generating material may comprise from about 10 to about 60 wt%, from about 10 wt% to about 40 wt%, from about 20 to about 50 wt%, from about 25 to about 40 wt% or from about 30 to about 35 wt% of an aerosol-former material.
  • the aerosol-generating material may comprise from about 0.1 wt%, about 0.5 wt%, about 1 wt%, about 3 wt%, about 5 wt%, about 7 wt% or about 10 wt% to about 50 wt%, about 45 wt%, about 40 wt%, about 35 wt%, about 30 wt% or about 25 wt% of an aerosol-former material (all calculated on a dry weight basis).
  • the aerosol-generating material may comprise from about 0.5 to about 40 wt%, from about 3 to about 35 wt% or from about 10 to about 25 wt% of an aerosolformer material.
  • the aerosol-former material may comprise one or more of glycerine, glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.
  • the aerosol-former material comprises one or more compound selected from erythritol, propylene glycol, glycerol, triacetin, sorbitol and xylitol. In some cases, the aerosol-former material comprises, consists essentially of, or consists of, glycerol.
  • the aerosol-former material comprises a mixture of glycerol and propylene glycol in a weight ratio of glycerol to propylene glycol of from about 3: 1 to about 1 :3, from about 2: 1 to about 1:2, from about 1.5: 1 to about 1 : 1.5, from about 55:45 to about 45:55, or about 45:55.
  • the aerosol-former material may act as a plasticiser. It has been established that if the content of the aerosol-former material is too high, the aerosol-generating material may absorb water (as the aerosol-former material is hygroscopic) resulting in a material that does not create an appropriate consumption experience in use. It has also been established that if the aerosol-former material content is too low, the t aerosol-generating material may be brittle and easily broken (as the aerosol-former material may act as a plasticiser).
  • the aerosol-former material content specified herein provides an aerosol-generating material with flexibility which allows the aerosol-generating material to be wound onto a bobbin or otherwise manipulated, which is useful in manufacture of aerosol generating articles.
  • the aerosol-generating material may comprise from about 10 wt%, about 20 wt%, about 30 wt%, about 40 wt% or about 45 wt% to about 60 wt%, about 55 wt% or about 50 wt% of botanical extract with added preservative (DWB).
  • the aerosol-generating material may comprise from about 20 to about 60 wt%, from about 40 to about 55 wt% or from about 45 to about 50 wt% of botanical extract (DWB).
  • the aerosol-generating material comprises from about 10 to about 60 wt% of the botanical extract with the added preservative, from about 1 to about 60 wt% binder and from about 5 to about 60 wt% aerosol-former material.
  • the aerosol-generating material may comprise from about 30 to about 60 wt% of the botanical extract with the added preservative, from about 1 to about 40 wt% binder and from about 10 to about 30 wt% aerosol-former material.
  • the aerosol-generating material comprises no more than about 0.2 wt% preservative.
  • the aerosol-generating material may comprise no more than about 0.15 wt% or no more than about 0.1 wt% preservative.
  • the only preservative included in the aerosol-generating material is the one or more preservative added to the botanical extract to limit bacterial growth in the extract before its incorporation in the aerosol-generating material.
  • the aerosol-generating material comprises an additional or added flavour and/or active substance, in addition to the flavour and/or active substance present in the botanical extract.
  • the aerosol-generating material may comprise up to about 60 wt%, about 50 wt%, about 40 wt%, about 30 wt%, about 20 wt%, about 10 wt% or about 5 wt% of such an additional flavour and/or active substance.
  • the aerosol-generating material may comprise at least about 0.5 wt%, about 1 wt%, about 2 wt%, about 5 wt%, about 10 wt%, about 20 wt% or about 30 wt% of an additional flavour and/or active substance (all calculated on a dry weight basis).
  • the aerosol-generating material may comprise from about 10 to about 60 wt%, from about 20 to about 50 wt% or from about 30 to about 40 wt% of an additional flavour and/or active substance.
  • the aerosol-generating material may comprise up to about 60 wt%, about 50 wt%, about 40 wt%, about 30 wt%, about 20 wt%, about 10 wt% or about 5 wt% of an additional or added flavour.
  • the aerosol-generating material may comprise at least about 0.5 wt%, about 1 wt%, about 2 wt%, about 5 wt%, about 10 wt%, about 20 wt% or about 30 wt% of an additional flavour (all calculated on a dry weight basis).
  • the aerosol-generating material may comprise from about 10 to about 60 wt%, from about 20 to about 50 wt% or from about 30 to about 40 wt% of an additional flavour.
  • the additional flavour (if present) comprises, consists essentially of, or consists of, menthol.
  • the aerosol-generating material does not comprise an added flavour and/or active substance. In some cases, the aerosol-generating material does not comprise an additional flavour. In some cases, the aerosol-generating material does not comprise a further active substance.
  • the total content of botanical extract and additional flavour and/or active substance may be no more than about 80 wt%, about 70 wt%, about 60 wt%, about 50 wt% or about 40 wt% (all calculated on a dry weight basis).
  • the aerosol-generating material comprises nicotine. In some embodiments, this nicotine may be derived from the botanical extract included in the aerosol-generating material. In other embodiments, such as those where the botanical extract is not a tobacco extract, the nicotine is an additional active substance included in the aerosol-generating material. In some embodiments, the aerosolgenerating material has a nicotine content of from about 1.5 wt% to about 7 wt% of the thin film (DWB).
  • DWB thin film
  • the aerosol-generating material may comprise at least about 1.5 wt%, about 2 wt%, about 2.5 wt%, about 3 wt%, about 3.5 wt%, about 4 wt%, about 4.5 wt% or about 5 wt% of nicotine (DWB).
  • the aerosol-generating material may comprise no more than about 7 wt%, about 6.5 wt%, about 6 wt%, about 5.5 wt%, about 5 wt%, about 4.5 wt%, about 4 wt%, about 3.5 wt% or about 3 wt% of nicotine (DWB).
  • the aerosol-generating material may comprise from about 2 to about 6 wt%, or from about 4 to about 5 wt% nicotine by weight of the thin film (DWB).
  • the aerosol-generating material comprises a filler.
  • the filler may be present to adjust the physical and/or chemical properties of the material. For example, in some embodiments, the filler may increase the tensile strength of the aerosol-generating material and render it more suitable for large scale manufacture of aerosol-generating articles. On the other hand, inclusion of a filler may add to the cost, weight and density of the aerosol-generating material. Adding to the mass of the aerosol-generating material potentially adds to the energy and time required to heat the film to generate the desired aerosol.
  • the aerosol-generating material comprises no more than about 60 wt% of a filler, such as from about 1 wt% to about 60 wt%, or from about 5 wt% to about 50 wt%, or from about 5 wt% to about 30 wt%, or from about 10 wt% to about 20 wt%. In other embodiments, the aerosol-generating material comprises no more than about 20 wt%, suitably no more than about 10 wt% or no more than about 5 wt% of a filler. In some cases, the aerosol-generating material comprises no more than about 1 wt% of a filler, and in some cases, comprises no filler.
  • the filler may comprise one or more inorganic filler materials, such as calcium carbonate, perlite, vermiculite, diatomaceous earth, colloidal silica, magnesium oxide, magnesium sulphate, magnesium carbonate, and suitable inorganic sorbents, such as molecular sieves.
  • the filler may comprise one or more organic filler materials such as wood pulp; tobacco pulp; hemp fibre; starch and starch derivatives, such as maltodextrin; chitosan; and cellulose and cellulose derivatives, such as microcrystalline cellulose and nanocrystalline cellulose.
  • the thin film comprises no calcium carbonate such as chalk.
  • the filler is fibrous.
  • the filler may be a fibrous organic filler material such as wood pulp, hemp fibre, cellulose or cellulose derivatives.
  • the fibrous filler is wood pulp.
  • the aerosol-generating material may increase the tensile strength of the material. This may be particularly advantageous in examples wherein the aerosol-generating material is provided as a sheet, such as in the form of a sheet that circumscribes a rod of aerosolisable material.
  • the aerosol-generating material does not comprise tobacco fibres. In particular embodiments, the aerosol-generating material does not comprise fibrous material.
  • the gelling agent is cellulose, such as CMC, and/or guar gum, and is used together with wood pulp as a filler.
  • the aerosol-generating material is a hydrogel.
  • the aerosol-generating material comprises no more than about 12 wt%, about 11 wt%, about 10 wt%, about 9.5 wt%, about 9 wt%, about 8.5 wt%, about 8 wt%, about 7.5 wt%, about 7 wt%, about 6.5 wt%, about 6 wt%, about 5.5 wt%, about 5 wt%, about 4.5 wt%, about 4 wt% or about 3.5 wt% water.
  • the aerosol-generating material may comprise at least about 1 wt%, about 1.5 wt%, about 2 wt%, about 2.5 wt% or about 3 wt% water.
  • the aerosol-generating material may consist essentially of, or consist of, one or more binders, an aerosol-former material, a botanical extract including the added preservative, water, and one or more fillers.
  • the aerosolgenerating material may consist essentially of, or consist of, glycerol, guar gum and/or cellulose, a botanical extract including the added preservative, and a filler such as wood pulp.
  • the aerosol-generating material comprises:
  • aerosol-generating materials having these compositions can be efficiently heated to generate an inhalable aerosol.
  • a second aerosol-generating material is provided in an aerosolgenerating composition and the second aerosol-generating material may comprise a carrier on which the first aerosol-generating material is provided.
  • This carrier may ease manufacture and/or handling through, for example, (a) providing a surface onto which a slurry may be cast (and which the slurry does not need to be separated from later), (b) providing a non-tacky surface for the aerosol-generating material, (c) providing some rigidity to the aerosol-generating material.
  • the carrier may be formed from materials selected from metal foil, paper, carbon paper, greaseproof paper, ceramic, carbon allotropes such as graphite and graphene, plastic, cardboard, wood or combinations thereof.
  • the carrier may comprise or consist of a botanical material, such as a sheet of reconstituted tobacco.
  • the carrier may be formed from materials selected from metal foil, paper, cardboard, wood or combinations thereof.
  • the carrier itself be a laminate structure comprising layers of materials selected from the preceding lists.
  • the carrier may also function as a flavour carrier.
  • the carrier may be impregnated with a flavourant or with botanical extract.
  • the carrier may be substantially or wholly impermeable to gas and/or aerosol. This prevents aerosol or gas passage through the carrier in use, thereby controlling the flow and ensuring it is delivered to the user. This can also be used to prevent condensation or other deposition of the gas/aerosol in use on, for example, the surface of a heater provided in an aerosol generating assembly. Thus, consumption efficiency and hygiene can be improved in some cases.
  • the aerosol-generating material may comprise heating means embedded in the aerosol-generating material, such as resistive or inductive heating elements.
  • the aerosol-generating material may be in the form of a sheet or film and may have a thickness of from about 0.015 mm to about 1.0 mm.
  • the thickness may be in the range of from about 0.05 mm, about 0.1 mm or about 0.15 mm to about 0.5 mm or about 0.3 mm.
  • a material having a thickness of about 0.2 mm may be particularly suitable.
  • the aerosol-generating material may comprise more than one layer, and the thickness described herein refers to the aggregate thickness of those layers.
  • the sheet or thin film of aerosol-generating material is too thick, then heating efficiency may be compromised. This adversely affects the power consumption in use. Conversely, if the sheet or film is too thin, it is difficult to manufacture and handle; a very thin material is harder to cast and may be fragile, compromising aerosol formation in use.
  • the thicknesses stipulated herein optimises the material properties in view of these competing considerations when in the form of a film or sheet.
  • the thickness stipulated herein is a mean thickness for the material.
  • the aerosolgenerating material sheet thickness may vary by no more than about 25%, about 20%, about 15%, about 10%, about 5% or about 1%.
  • the aerosol-generating material may have any suitable area density, such as from about 30 g/m 2 to about 120 g/m 2 . In some embodiments, aerosol-generating material may have an area density of from about 30 to about 70 g/m 2 , or from about 40 to about 60 g/m 2 . In some embodiments, the aerosol-generating material may have an area density of from about 80 to about 120 g/m 2 , or from about 70 to about 110 g/m 2 , or particularly from about 90 to about 110 g/m 2 . Such area densities may be particularly suitable where the aerosol-generating material is included in an aerosol generating article/assembly in sheet form, or as a shredded sheet (described further hereinbelow).
  • the aerosol-generating material may be formed as a sheet. It may be incorporated into the article in sheet form. In some cases, the second aerosol-generating material may be included as a planar sheet, as a bunched or gathered sheet, as a crimped sheet, or as a rolled sheet (i.e., in the form of a tube or as a rolled plug).
  • the aerosol-generating material may be included in an aerosol generating article/assembly as a sheet, such as a sheet circumscribing a rod of the first aerosol-generating material.
  • the aerosol-generating material may be formed as a sheet and then shredded and incorporated into the article.
  • the shredded sheet may be mixed with one or more further aerosol-generating material and incorporated into the article.
  • the aerosol-generating material may have a mass per unit area that is selected to be comparable to the density of the further aerosol-generating material, so the mixture components do not separate.
  • the aerosol-generating material may have a mass per unit area of from about 80 to about 120 g/m 2 so that it has a density comparable to cut rag tobacco.
  • the aerosol-generating material in sheet form may have a tensile strength of from about 200 N/m to about 900 N/m. In some examples, such as where the aerosol-generating material does not comprise a filler, the aerosol-generating material may have a tensile strength of from about 200 N/m to about 400 N/m, or from about 200 N/m to about 300 N/m, or about 250 N/m. Such tensile strengths may be particularly suitable for embodiments wherein the aerosol-generating material is formed as a sheet and then shredded and incorporated into an aerosol generating article.
  • the aerosol-generating material may have a tensile strength of from about 600 N/m to about 900 N/m, or from about 700 N/m to about 900 N/m, or about 800 N/m.
  • tensile strengths may be particularly suitable for embodiments wherein the aerosol-generating material is included in an aerosol generating article/assembly as a wrapper or as a rolled sheet, suitably in the form of a tube.
  • Aerosol-generating composition Where an aerosol-generating composition is provided comprising the aerosolgenerating material comprising the botanical extract with added preservative, the composition may also comprise one or more further aerosol-generating material.
  • the further aerosol-generating material comprises a botanical material.
  • the botanical is selected from the botanicals listed herein, including, for example, eucalyptus, star anise, cocoa and hemp, rooibos and fennel.
  • the botanical material comprises leaf material.
  • the botanical material is tobacco material.
  • tobacco material refers to any material comprising tobacco or derivatives thereof.
  • tobacco material may include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes.
  • the tobacco material may comprise one or more of ground tobacco, tobacco fibre, cut tobacco, extruded tobacco, tobacco stem, reconstituted tobacco and/or tobacco extract.
  • the tobacco used to produce tobacco material may be any suitable tobacco, such as single grades or blends, cut rag or whole leaf, including Virginia and/or Burley and/or Oriental. It may also be tobacco particle 'fines' or dust, expanded tobacco, stems, expanded stems, and other processed stem materials, such as cut rolled stems.
  • the tobacco material may be a ground tobacco or a reconstituted tobacco material.
  • the reconstituted tobacco material may comprise tobacco fibres, and may be formed by casting, a Fourdrinier-based paper making-type approach with back addition of tobacco extract, or by extrusion.
  • the botanical material may, in some cases, comprise water.
  • the botanical material is a dried botanical material, that is, the plant material has been treated to remove the water naturally present in the plant.
  • the botanical material comprises no more than about 20 wt%, about 15 wt%, about 12 wt% or about 10 wt% water.
  • the botanical material may comprise at least about 1 wt%, about 2 wt% or about 5 wt% water.
  • the botanical may comprise from about 10 wt% to about 20 wt% water, or from about 10 wt% to about 15 wt%.
  • the water content of the thin film may be about 12 wt%.
  • the different aerosol-generating materials may be provided in different proportions and in different configurations.
  • the aerosol-generating composition comprises from about 5 wt% to about 95 wt% of an aerosol-generating material comprising botanical material and from about 95 wt% to about 5 wt% of an aerosol-generating material comprising a botanical extract with added preservative.
  • the aerosol-generating composition comprises from about 5 wt%, about 10 wt%, about 15 wt%, about 20 wt%, about 25 wt%, about 30 wt%, about 35 wt%, about 40 wt%, about 45 wt%, about 50 wt%, about 55 wt%, about 60 wt%, about 65 wt%, about 70 wt%, about 75 wt%, about 80 wt%, about 85 wt%, about 90 wt% or about 95 wt% of the aerosolgenerating material comprising the botanical extract with added preservative, or of the further aerosol-generating material.
  • the aerosolgenerating composition comprises no more than about 95 wt%, about 90 wt%, about 85 wt%, about 80 wt%, about 75 wt%, about 70 wt%, about 65 wt%, about 60 wt%, about 55 wt%, about 50 wt%, about 45 wt%, about 40 wt%, about 35 wt%, about 30 wt%, about 25 wt%, about 20 wt%, about 15 wt%, about 10 wt% or about 5 wt% of the aerosol-generating material comprising the botanical extract with added preservative or of the further aerosol-generating material.
  • the aerosol-generating materials may differ in one or more further ways.
  • the first and second aerosol-generating materials include different active substances.
  • the aerosol-generating materials may have different thicknesses and/or may be provided in otherwise different sizes, such as cut to different dimensions or average particle sizes.
  • the density of the aerosol-generating materials may be different.
  • the aerosol-generating materials include different components or the same components in different amounts.
  • the two or more aerosol-generating materials may be included in the aerosolgenerating material in different amounts.
  • the different aerosol-generating materials may be mixed to form a largely homogenous blend.
  • the distribution of the different aerosol-generating materials is controlled to provide a desired distribution within the material, optionally with the materials being unmixed or substantially unmixed.
  • the aerosol-generating composition comprises a blend of two or more different aerosol-generating materials this may control the release of the active agents.
  • the blend may provide a consistent release throughout use of the consumable, and may be configured/formulated to provide either a rapid release or a slow release.
  • the aerosol-generating materials may be arranged within the composition to allow them to be heated together or separately. Separate heating may mean in terms of timing, for example, sequentially, and/or in terms of heating to different temperatures.
  • the aerosol-generating material comprising the botanical extract with added preservative may comprise an aerosol-former material.
  • an aerosol-former material may optionally also be included in the further aerosolgenerating material.
  • the aerosol-generating composition comprises (in total) from about 10 to about 25 wt% of an aerosol-former material (DWB).
  • the aerosol-generating composition comprises at least about 10 wt%, about 12 wt%, about 15 wt%, about 18 wt%, about 20 wt% or about 22 wt% of one or more aerosol-former material. Additionally or alternatively, the aerosol-generating composition comprises no more than about 40 wt%, about 35 wt%, about 30 wt%, about 25 wt%, about 22 wt%, about 20 wt%, about 18 wt%, about 15 wt% or no more than about 12 wt% of aerosol-former material.
  • the amount of aerosol-former material in the aerosol-generating composition is from about 10 wt% to about 40 wt%, from about 15 wt% to about 25 wt%, or from about 20 wt% to about 25 wt% (DWB).
  • the aerosol-generating composition may comprise water. In some embodiments, the aerosol-generating composition comprises no more than about 15 wt%, about 12 wt% or about 10 wt% water. In some cases, the aerosol-generating composition may comprise at least about 1 wt%, about 2 wt% or about 5 wt% water. In some cases, the aerosol-generating composition comprises from about 5 wt% to about 15 wt% water, or from about 10 wt% to about 12 wt%.
  • Article An article for use in an aerosol provision system comprises an aerosol-generating portion comprising one or more of the aerosol-generating materials and/or the aerosol-generating compositions described herein.
  • the aerosol generating article may be circumscribed by a wrapping material such as paper.
  • the article may additionally comprise a filter and/or cooling element.
  • the filter and/or cooling element and the aerosol-generating portion are joined by tipping paper that circumscribes at least a portion of both of these parts of the article.
  • the cooling element may act or function to cool gaseous or aerosol components. In some cases, it may act to cool gaseous components such that they condense to form an aerosol. It may also act to space the very hot parts of the apparatus from the user.
  • the cooling segment comprises a longitudinally extending air channel for cooling the flow of air therethrough.
  • the filter may comprise any suitable filter known in the art such as a cellulose acetate plug or a paper plug, and optionally including capsule.
  • the article comprises a mouth end hollow tubular body.
  • the one or more sections selected from the mouth end tubular body, filter plug and cooling element may be combined by a wrapping material to form a mouthpiece of the article.
  • the mouthpiece may be attached to the aerosol-generating portion, for example by a tipping paper.
  • the aerosol-generating article and/or the aerosol-generating portion thereof comprises the aerosol-generating material in the form of a sheet positioned to surround at least part of a plug or section comprising the further aerosol-generating material.
  • the aerosol-generating material is included in the form of a cut or shredded sheet which is optionally blended with one or more further aerosolgenerating material.
  • the aerosol generating portion of the article comprises a first section comprising a first aerosol-generating material and a second section comprising a second aerosol-generating material.
  • the section comprising the aerosol-generating material comprising the botanical extract with added preservative is in the form of a rolled sheet of the aerosol-generating material.
  • Figure 1 is a side-on cross-sectional view of an article 1 for use in an aerosol provision system.
  • the article comprises a consumable for a noncombustible aerosol provision system.
  • the article comprises an aerosol generating portion, in the present case a cylindrical aerosol-generating portion 2, and a mouthpiece 3 downstream from and connected to the aerosol-generating portion 2.
  • the aerosol-generating portion 2 comprises a rod or segment of aerosol-generating composition 20 wrapped in a rod wrapper 10.
  • the rod of aerosol-generating composition 20 comprises a blend of an aerosol-generating material comprising a botanical extract with added preservative and a further aerosol-generating material comprising botanical material.
  • the two materials are cut or shredded, and the two different shredded materials are blended and formed into a rod segment.
  • the two aerosol-generating materials are fairly evenly distributed within the rod and along the length of the rod.
  • the article 1 also comprises a mouthpiece 3 which has a mouth end 3b and a distal end 3a that abuts the aerosol-generating portion 2.
  • the mouthpiece 3 illustrated in Figure 1 is located at the mouth end of the article 1 and comprises three elements, a mouthpiece body 14 downstream of a cooling section 13, and a hollow tubular element 15 downstream of the mouthpiece body 14.
  • these different mouthpiece elements may be omitted or duplicated, and/or the elements may be provided in a different sequence.
  • the hollow tubular element 15 may be omitted, and the mouthpiece body 14 may form the mouth end of the article.
  • the length of the mouthpiece body 14 may be increased, or a further body of material may be provided at the mouth end.
  • the mouthpiece comprises a mouthpiece body at the mouth end of the mouthpiece, optionally comprising a plug of cellulose acetate tow or paper, and optionally including capsule. Adjacent to this mouthpiece body is a first tube, optionally formed from paper, which abuts at its other end a further tubular section, optionally comprising cellulose acetate.
  • the cooling section 13, mouthpiece body 14 and hollow tubular element 15 are connected by a combining wrapping material 11.
  • tipping paper 9 is wrapped around the full length of the mouthpiece 3 and over part of the aerosol generating portion 2.
  • the tipping paper 9 has an adhesive on its inner surface (not shown) to connect the mouthpiece 3 and rod 2.
  • the tipping paper 9 extends about 5 mm over the rod of aerosol generating material 2 but it can alternatively extend from about 3 mm to about 15 mm over the rod 2, or from about 4 mm to about 6 mm, to provide a secure attachment between the mouthpiece 3 and rod 2.
  • the article 1 is provided with first and second parallel rows of perforations 12 through the tipping material 9, combining wrapping material 11 and cooling section 13, providing ventilation into the mouthpiece 3 at the cooling section 13.
  • the perforations 12 shown are formed as laser perforations, at positions about 18 mm and about 19 mm respectively from the downstream, mouth-end 3b of the mouthpiece 3.
  • the ventilation can be provided into the mouthpiece 3 at other locations.
  • the article further comprises a component or plug at the opposite end of the article to the mouthpiece. This is also referred to herein as the upstream end or the distal end of the article.
  • the component comprises a body of material having a generally cylindrical outer shape. In some embodiments, this body of material is formed from a crimped and gathered sheet of material, such as paper.
  • the stability of the article may be improved, by preventing fall-out of aerosol-generating material from the upstream end of the article.
  • the component comprises a body of material having a resistance to draw between about 1% and 30% of the resistance to draw of the article
  • its presence can also result in greater consistency of resistance to draw between articles, since the contribution of the rod of aerosol-generating material to the overall resistance to draw of the article is relatively less.
  • the relatively high resistance to draw of the component can make the overall resistance to draw of the article less sensitive to variations in the resistance to draw of the rod of aerosol-generating material.
  • the presence of the component can also help to manage the intensity of the aerosol generated by the article by managing the dilution by the ventilation.
  • the component has a length in the range of about 3 mm to about 15 mm, and preferably a length of about 4 mm to about 6 mm.
  • the outer circumference of the component is substantially the same as the outer circumference of the aerosol-generating segment, such that there is a smooth transition between these components.
  • the invention also relates to an aerosol generating assembly comprising an aerosol generating article described herein and a heater configured to heat but not burn the aerosol-generating composition (also referred to herein as the aerosolisable material).
  • the heater may be, in some cases, a thin film, electrically resistive heater. In other cases, the heater may comprise an induction heater or the like. In other embodiments, the heater may an infrared or irradiative heater. The heater may be a combustible heat source or a chemical heat source which undergoes an exothermic reaction to product heat in use.
  • the aerosol generating assembly may comprise a plurality of heaters. The heater(s) may be powered by a battery.
  • the heater may heat, without burning, the aerosolisable material to a temperature from about 120°C to about 350°C in use. In some cases, the heater may heat, without burning, the aerosolisable material to a temperature from about 140°C to about 250°C in use. In some cases, in use, substantially all of the aerosolgenerating composition is no more than about 4 mm, about 3 mm, about 2 mm or about 1 mm from the heater. In some cases, the aerosol-generating composition is disposed from about 0.01 mm to about 2 mm from the heater, suitably from about 0.02 mm to about 1 mm, suitably from about 0.1 mm to about 0.5 mm. These minimum distances may, in some cases, reflect the thickness of a carrier that supports the aerosol-generating material. In some cases, a surface of the aerosol-generating composition may directly abut the heater.
  • the heater may be embedded in the aerosol-generating composition or may be inserted into the aerosol-generating article upon use. Such heaters may be referred to as internal heaters. In some such cases, the heater may be an electrically resistive heater (with exposed contacts for connection to an electrical circuit). In other such cases, the heater may be a susceptor embedded in the aerosol-generating composition, which is heated by induction. Alternatively, the heater may be an irradiative or infrared heater.
  • Internal heaters may, for example, be in the form of a blade, foil or pin. They may be part of the aerosol-generating article or a part of the device into which the article is inserted for use.
  • the aerosol generating assembly may be a heat-not-burn device. That is, it may contain a solid aerosol-generating composition and no liquid aerosolisable material. In some cases, the aerosol-generating composition may comprise tobacco material.
  • a heat-not-burn device is disclosed in WO 2015/062983 A2, which is incorporated by reference in its entirety.
  • the aerosol generating assembly may be an electronic tobacco hybrid device. That is, it may contain a solid aerosol-generating composition and a liquid aerosolisable material.
  • the solid aerosol-generating composition may comprise nicotine.
  • the solid aerosol-generating composition may comprise a tobacco material.
  • the solid aerosol-generating composition may comprise a tobacco material and a separate nicotine source.
  • the separate aerosolisable materials may be heated by separate heaters, the same heater or, in one case, a downstream solid aerosol-generating composition may be heated by a hot aerosol which is generated from the upstream aerosolisable material.
  • An electronic hybrid device is disclosed in WO 2016/135331 Al, which is incorporated by reference in its entirety.
  • the aerosol generating article or assembly may additionally comprise ventilation apertures. These may be provided in the sidewall of the article. In some cases, the ventilation apertures may be provided in the filter and/or cooling element. These apertures may allow cool, ambient air to be drawn into the article during use, which can mix with the heated volatilised components thereby cooling the aerosol.
  • the ventilation enhances the generation of visible heated volatilised components from the article when it is heated in use.
  • the heated volatilised components are made visible by the process of cooling the heated volatilised components such that supersaturation of the heated volatilised components occurs.
  • the heated volatilised components then undergo droplet formation, otherwise known as nucleation, and eventually the size of the aerosol particles of the heated volatilised components increases by further condensation of the heated volatilised components and by coagulation of newly formed droplets from the heated volatilised components.
  • Figure 2 shows an example of a non-combustible aerosol provision device 100 for generating aerosol from an aerosol-generating composition of an article or consumable 110, as described herein.
  • the article 110 may be the article 1 shown in Figure 1.
  • the device 100 may be used to heat a replaceable article 110 comprising the aerosol-generating composition as described herein, for instance an article as described elsewhere herein, to generate an aerosol or other inhalable medium which is inhaled by a user of the device 100.
  • the device 100 and replaceable article 110 together form a system.
  • the device 100 comprises a housing 102 (in the form of an outer cover) which surrounds and houses various components of the device 100.
  • the device 100 has an opening 104 in one end, through which the article 110 may be inserted for heating by a heating assembly. In use, the article 110 may be fully or partially inserted into the heating assembly where it may be heated by one or more components of the heater assembly.
  • the article 110 is illustrated having a rod-shape, like the articles 1 illustrated in Figure 1.
  • the device 100 of this example comprises a first end member 106 which comprises a lid 108 which is moveable relative to the first end member 106 to close the opening 104 when no article 110 is in place.
  • the lid 108 is shown in an open configuration, however the lid 108 may move into a closed configuration. For example, a user may cause the lid 108 to slide in the direction of arrow "B".
  • the device 100 may also include a user-operable control element 112, such as a button or switch, which operates the device 100 when pressed.
  • a user may turn on the device 100 by operating the switch 112.
  • This switch may also actuate the means for opening the container inserted into the device, in readiness for its use.
  • the device 100 may also comprise an electrical component, such as a socket/port 114, which can receive a cable to charge a battery of the device 100.
  • a socket/port 114 may be a charging port, such as a USB charging port.
  • the invention also provides a method of making an aerosol-generating material as described herein.
  • the method comprises the steps of: taking a botanical extract comprising an added preservative and combining this with a binder, an aerosol former material to form a liquid precursor composition; and solidifying the liquid precursor.
  • the liquid precursor further comprises a filler.
  • the liquid precursor composition may be in the form of a slurry or suspension.
  • the liquid precursor composition is cast into a film or sheet and then dried to form the aerosol-generating material.
  • the liquid precursor composition may be extruded.
  • the solidification step may comprise drying to remove the solvent. Additionally or alternatively, the solidification step may comprise cross-linking, for example, crosslinking of the binder by exposure to a cross-linking agent.
  • the method comprises: (a) forming a liquid precursor composition comprising components of the thin film or precursors thereof, (b) shaping the liquid precursor composition, for example by forming a layer, (c) optionally setting the liquid precursor composition to form a gel, and (d) drying to form the solid aerosol-generating material.
  • the step (b) of shaping the liquid precursor composition may comprise spraying, casting or extruding the precursor composition, for example.
  • a layer is formed by electro spraying the precursor composition.
  • the layer is formed by casting the precursor composition.
  • the step (c) of setting the gel may comprise the addition of a setting agent to the liquid precursor composition.
  • the precursor composition may comprise sodium, potassium or ammonium alginate as a gelling agent, and a setting agent comprising a calcium source (such as calcium chloride), may be added to form a calcium alginate gel.
  • the solvent in the liquid precursor composition may consist essentially of, or consist of, water. In some cases, the liquid precursor composition may comprise from about 50 wt%, about 60 wt%, about 70 wt%, about 80 wt% or about 90 wt% of solvent (WWB).
  • WWB solvent
  • the dry weight content of the liquid precursor composition will match the dry weight content of the aerosol-generating material.
  • the discussion herein relating to the solid composition is explicitly disclosed in combination with the liquid precursor composition aspect of the invention.
  • the present invention is also relevant to aerosol-free delivery systems that deliver the at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff, wherein the at least one substance may or may not comprise nicotine.
  • Such products may comprise a cellulosic material comprising a botanical extract, the botanical extract comprising an added preservative to limit microbial growth in the extract before its incorporation in the cellulosic material.
  • Oral products may or may not include tobacco.
  • oral products may include oral tobacco which includes snus or moist snuff, wherein the at least one substance to be delivered may or may not comprise nicotine.
  • oral products comprise one or more fillers, and at least one additional component selected from the group consisting of active ingredients, flavourants, and combinations thereof.
  • additional component selected from the group consisting of active ingredients, flavourants, and combinations thereof.
  • the relative amounts of the various components within the composition may vary, and typically are selected so as to provide the desired sensory and performance characteristics to the oral product.
  • Fillers may fulfil multiple functions, such as enhancing certain organoleptic properties such as texture and mouthfeel, enhancing cohesiveness or compressibility of the oral product, and the like.
  • the fillers are particulate materials and/or fibrous materials, and are cellulose-based.
  • suitable fillers are any non-tobacco plant material or derivative thereof, including cellulose materials derived from such sources.
  • cellulosic non-tobacco plant material examples include cereal grains (e.g., maize, oat, barley, rye, buckwheat, and the like), sugar beet (e.g., FIBREX® brand filler available from International Fiber Corporation), bran fiber, bamboo fiber, wood pulp fiber, cotton fiber, citrus pulp fiber, grass fiber, willow fiber, poplar fiber, cocoa fiber, derivatives thereof, and mixtures thereof.
  • Non-limiting examples of derivatives of non-tobacco plant material include starches (e.g., from potato, rye, oat, barley, wheat, rice, corn), natural cellulose, and modified cellulosic materials.
  • fillers include maltodextrin, dextrose, calcium carbonate, calcium phosphate, lactose, mannitol, xylitol, and sorbitol. As described in more detail below, combinations of fillers can also be used. Note that many of the above plant sources for filler materials can be used in a variety of forms, including processed plant material in the form of particulates or fibers, or in relatively unprocessed forms (e.g., whole straw,) such as straw materials from common grains such as rye, wheat, oat, or ba rley.
  • the product comprises the cellulosic material including the botanical extract with added preservative held within a cavity defined by a pouch.
  • the cellulosic material including the botanical extract with added preservative is incorporated into sheet material forming a pouch.
  • a tobacco extract was obtained by extraction with deionised and purified water.
  • potassium sorbate is added in an amount of 0.2 wt% (WWB).
  • the extract comprised 3.12 wt% nicotine and had a solids content (including nicotine) of 62.92 wt% (WWB).
  • An alternative tobacco extract is obtained by extraction with deionised and purified water and ethanol. To this extract, potassium sorbate is added in an amount of 0.2 wt% (WWB).
  • the extract was used to form a mixture of binder, aerosol-former material, filler and deionised and purified water, forming a slurry having the following composition.
  • the slurry was made in a Silverson L5M-A Laboratory Mixer which was placed in a 10- litre glass or metal beaker. A premix of glycerol and guar gum was formed and kept.
  • Step 1 Add wood pulp and water (97% moisture) to the beaker and run the mixer at a speed of 1200 rpm for 2 minutes.
  • Step 2 Add ground cellulose (ARBOCEL B 600) slowly over a period of 2 minutes into the wood pulp mixture. Increase the speed to 2000 rpm and blend for an additional 2 minutes.
  • ARBOCEL B 600 ground cellulose
  • Step 3 Add tobacco extract slowly over 2 minutes into the slurry mix keeping the mixer speed at 2000 rpm and blend for a further 3 minutes.
  • Step 4 Add the premix of glycerol and guar gum slowly to slurry over 2 minutes at a speed of 3000 rpm and blend for an additional 5 minutes.
  • Step 5 Adjust the casting knife between 0.10 to 0.13 cm and cast the slurry in sheets on a metal plate. Dry the sheets at a temperature between 70°C and 120°C for 3 hours in an oven.
  • the slurry is mixed to ensure that it is a homogenous mixture before it is cast onto a metal plate to a thickness of about 2 mm and allowed to set to form a gel.
  • the gel had set, it was dried in an oven at 65°C from approximately 2 hours. In other instances, the set gel was dried in a dryer at 120°C. Drying resulted in a 90% shrinkage, a thin film having approximately 10 wt% water and a thickness of about 0.2 mm.
  • the aim is to provide a thin film with a tensile strength of at least about 7 N/15mm.
  • the film should also be 70 to 200 GSM.
  • the dried cast sheet met these criteria and had a glycerol content of approximately 17 wt% and a nicotine content of approximately 2.5 wt%.
  • the thin film is in the form of a sheet and may be incorporated into a consumable in a variety of different ways, including in combinations of ways.
  • the thin film may be shredded and mixed with cut rag tobacco.
  • the sheet may be used to wrap a plug of aerosol-generating material comprising cut rag tobacco.
  • the plug of the cut rag tobacco is surrounded by the thin film material is then circumscribed by an outer paper wrap (so that the thin film is used as an inner wrap).
  • the outer paper wrapper provides the article with an attractive and clean appearance, and adequate stiffness.
  • the wrapper may also help to retain the glycerol within the aerosolgenerating composition.
  • the thin film may be used as an inner wrap in a hollow rod.
  • the active substance as used herein may be a physiologically active material, which is a material intended to achieve or enhance a physiological response.
  • the active substance may for example be selected from nutraceuticals, nootropics, psychoactives.
  • the active substance may be naturally occurring or synthetically obtained.
  • the active substance may comprise for example nicotine, caffeine, taurine, theine, vitamins such as B6 or B12 or C, melatonin, cannabinoids, or constituents, derivatives, or combinations thereof.
  • the active substance may comprise one or more constituents, derivatives or extracts of tobacco, cannabis or another botanical.
  • the active substance comprises nicotine. In some embodiments, the active substance comprises caffeine, melatonin or vitamin B12.
  • the active substance may comprise one or more constituents, derivatives or extracts of cannabis, such as one or more cannabinoids or terpenes.
  • the active substance may be CBD or a derivative thereof.
  • Cannabinoids are a class of natural or synthetic chemical compounds which act on cannabinoid receptors (i.e., CB1 and CB2) in cells that repress neurotransmitter release in the brain.
  • Cannabinoids may be naturally occurring (phytocannabinoids) from plants such as cannabis, from animals (endocannabinoids), or artificially manufactured (synthetic cannabinoids).
  • Cannabis species express at least 85 different phytocannabinoids, and are divided into subclasses, including cannabigerols, cannabichromenes, cannabidiols, tetrahydrocannabinols, cannabinols and cannabinodiols, and other cannabinoids.
  • Cannabinoids found in cannabis include, without limitation: cannabigerol (CBG), cannabichromene (CBC), cannabidiol (CBD), tetrahydrocannabinol (THC), cannabinol (CBN), cannabinodiol (CBDL), cannabicyclol (CBL), cannabivarin (CBV), tetrahydrocannabivarin (THCV), cannabidivarin (CBDV), cannabichromevarin (CBCV), cannabigerovarin (CBGV), cannabigerol monomethyl ether (CBGM), cannabinerolic acid, cannabidiolic acid (CBDA), Cannabinol propyl variant (CBNV), cannabitriol (CBO), tetrahydrocannabmolic acid (THCA), and tetrahydrocannabivarinic acid (THCV A).
  • CBD cannabigerol
  • flavour and “flavourant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers. They may include naturally occurring flavour materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice (liquorice), hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, Wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch,
  • the flavour may be imitation, synthetic or natural ingredients or blends thereof. They may be in any suitable form, for example, liquid such as an oil, solid such as a powder, or gas.
  • the flavour comprises menthol, spearmint and/or peppermint.
  • the flavour comprises flavour components of cucumber, blueberry, citrus fruits and/or redberry.
  • the flavour comprises eugenol.
  • the flavour comprises flavour components extracted from tobacco.
  • the flavour comprises flavour components extracted from cannabis.
  • the flavour may comprise a sensate, which is intended to achieve a somatosensorial sensation which are usually chemically induced and perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in addition to or in place of aroma or taste nerves, and these may include agents providing heating, cooling, tingling, numbing effect.
  • a suitable heat effect agent may be, but is not limited to, van illyl ethyl ether and a suitable cooling agent may be, but is not limited to, eucolyptol and WS-3.
  • weight percentages by weight described herein are calculated on a dry weight basis, unless explicitly stated otherwise. All weight ratios are also calculated on a dry weight basis.
  • a weight quoted on a dry weight basis refers to the whole of the extract or slurry or material, other than the water, and may include components which by themselves are liquid at room temperature and pressure, such as glycerol.
  • a weight percentage quoted on a wet weight basis refers to all components, including water.

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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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Abstract

L'invention concerne un matériau de génération d'aérosol comprenant un extrait botanique, l'extrait botanique comprenant un conservateur ajouté pour limiter la croissance microbienne dans l'extrait avant son incorporation dans le matériau de génération d'aérosol. L'invention concerne également des articles comprenant de tels matériaux, par exemple destinés à être utilisés dans un système de fourniture d'aérosol. L'invention concerne en outre des systèmes de fourniture d'aérosol, et des procédés de formation de matériau de génération d'aérosol. En outre, l'invention concerne des extraits qui peuvent être utilisés dans lesdits matériaux et procédés de génération d'aérosol.
PCT/EP2025/055373 2024-02-29 2025-02-27 Matériaux de génération d'aérosol, articles de génération d'aérosol et extraits et leurs procédés de fabrication Pending WO2025181255A1 (fr)

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EP24160461.0A EP4609730A1 (fr) 2024-02-29 2024-02-29 Matériaux générateurs d'aérosols, articles générateurs d'aérosols, et extraits et procédés pour les fabriquer

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015062983A2 (fr) 2013-10-29 2015-05-07 British American Tobacco (Investments) Limited Appareil permettant de chauffer une matière pouvant être fumée
US20150189912A1 (en) * 2012-08-03 2015-07-09 British American Tobacco (Investments) Limited Tobacco extract, preparation thereof
WO2016135331A1 (fr) 2015-02-27 2016-09-01 British American Tobacco (Investments) Limited Cartouche, éléments et procédés de génération de milieu inhalable
WO2016184977A1 (fr) * 2015-05-20 2016-11-24 British American Tobacco (Investments) Limited Matériau générateur d'aérosol et dispositifs le comprenant
CN105433430B (zh) * 2015-12-04 2017-08-29 河南中烟工业有限责任公司 一种适用于加热非燃烧装置的烟草材料及其制备方法
US20220256908A1 (en) * 2019-06-05 2022-08-18 Philip Morris Products S.A. Concentration of wet tobacco extracts
US20220295864A1 (en) * 2019-12-09 2022-09-22 Nicoventures Trading Limited Liquid oral composition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150189912A1 (en) * 2012-08-03 2015-07-09 British American Tobacco (Investments) Limited Tobacco extract, preparation thereof
WO2015062983A2 (fr) 2013-10-29 2015-05-07 British American Tobacco (Investments) Limited Appareil permettant de chauffer une matière pouvant être fumée
WO2016135331A1 (fr) 2015-02-27 2016-09-01 British American Tobacco (Investments) Limited Cartouche, éléments et procédés de génération de milieu inhalable
WO2016184977A1 (fr) * 2015-05-20 2016-11-24 British American Tobacco (Investments) Limited Matériau générateur d'aérosol et dispositifs le comprenant
CN105433430B (zh) * 2015-12-04 2017-08-29 河南中烟工业有限责任公司 一种适用于加热非燃烧装置的烟草材料及其制备方法
US20220256908A1 (en) * 2019-06-05 2022-08-18 Philip Morris Products S.A. Concentration of wet tobacco extracts
US20220295864A1 (en) * 2019-12-09 2022-09-22 Nicoventures Trading Limited Liquid oral composition

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