WO2020025698A1 - Aerosol generation - Google Patents
Aerosol generation Download PDFInfo
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- WO2020025698A1 WO2020025698A1 PCT/EP2019/070675 EP2019070675W WO2020025698A1 WO 2020025698 A1 WO2020025698 A1 WO 2020025698A1 EP 2019070675 W EP2019070675 W EP 2019070675W WO 2020025698 A1 WO2020025698 A1 WO 2020025698A1
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- aerosol generating
- amorphous solid
- article
- aerosol
- cases
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
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- 229910001416 lithium ion Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
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- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
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- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
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- 235000021436 nutraceutical agent Nutrition 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 239000010502 orange oil Substances 0.000 description 1
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- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 235000019408 sucralose Nutrition 0.000 description 1
- BAQAVOSOZGMPRM-QBMZZYIRSA-N sucralose Chemical compound O[C@@H]1[C@@H](O)[C@@H](Cl)[C@@H](CO)O[C@@H]1O[C@@]1(CCl)[C@@H](O)[C@H](O)[C@@H](CCl)O1 BAQAVOSOZGMPRM-QBMZZYIRSA-N 0.000 description 1
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- 230000003746 surface roughness Effects 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- 235000013529 tequila Nutrition 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N tetradecanoic acid Chemical class CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 229940026510 theanine Drugs 0.000 description 1
- 229960000790 thymol Drugs 0.000 description 1
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- 239000001069 triethyl citrate Substances 0.000 description 1
- VMYFZRTXGLUXMZ-UHFFFAOYSA-N triethyl citrate Natural products CCOC(=O)C(O)(C(=O)OCC)C(=O)OCC VMYFZRTXGLUXMZ-UHFFFAOYSA-N 0.000 description 1
- 235000013769 triethyl citrate Nutrition 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 235000001019 trigonella foenum-graecum Nutrition 0.000 description 1
- 235000004952 turnera diffusa Nutrition 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000019163 vitamin B12 Nutrition 0.000 description 1
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- DBRXOUCRJQVYJQ-CKNDUULBSA-N withaferin A Chemical compound C([C@@H]1[C@H]([C@@H]2[C@]3(CC[C@@H]4[C@@]5(C)C(=O)C=C[C@H](O)[C@@]65O[C@@H]6C[C@H]4[C@@H]3CC2)C)C)C(C)=C(CO)C(=O)O1 DBRXOUCRJQVYJQ-CKNDUULBSA-N 0.000 description 1
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- 239000000811 xylitol Substances 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
- A24B15/167—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes in liquid or vaporisable form, e.g. liquid compositions for electronic cigarettes
-
- 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
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/20—Cigarettes specially adapted for simulated smoking devices
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/20—Devices using solid inhalable precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
Definitions
- the present invention relates to aerosol generation.
- Smoking articles such as cigarettes, cigars and the like bum tobacco during use to create tobacco smoke.
- Alternatives to these types of 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 assemblies.
- a heating device which release 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-bum devices, tobacco heating devices or tobacco heating products.
- Various different arrangements for volatilising at least one component of the solid aerosolisable material are known.
- e-cigarette / tobacco heating product hybrid devices also known as electronic tobacco hybrid devices.
- These hybrid devices contain a liquid source (which may or may not contain nicotine) which is vaporised by heating to produce an inhalable vapour or aerosol.
- the device additionally contains a solid aerosolisable material (which may or may not contain a tobacco material) and components of this material are entrained in the inhalable vapour or aerosol to produce the inhaled medium.
- a first aspect of the invention provides an aerosol generating material comprising an aerosol-forming layer, the aerosol-forming layer comprising an amorphous solid, wherein the aerosol- forming layer has a thickness of 0.015mm to l .Omm. In one embodiment, the aerosol- forming layer has a thickness of from 0.05mm to l .Omm.
- the amorphous solid comprises one or more of an active substance, an aerosol generating agent, a flavourant and a gelling agent.
- the amorphous solid comprises one or more of nicotine, a tobacco material, an aerosol generating agent, a flavourant and a gelling agent
- a second aspect of the invention provides an aerosol generating assembly comprising an aerosol generating material according to the first aspect of the invention and a heater configured to heat but not bum the aerosol generating material.
- a third aspect of the invention provides an aerosol generating article for use in an aerosol generating assembly, the article comprising an aerosol generating material according to the first aspect.
- a fourth aspect of the invention provides a method of making an aerosol generating material according to the first aspect.
- Figure 1 is an exploded schematic diagram of an aerosol generating material.
- Figure 2 shows a section view of an example of an aerosol generating article.
- Figure 3 shows a perspective view of the article of Figure 2.
- Figure 4 shows a sectional elevation of an example of an aerosol generating article.
- Figure 5 shows a perspective view of the article of Figure 4.
- Figure 6 shows a perspective view of an example of an aerosol generating assembly.
- Figure 7 shows a section view of an example of an aerosol generating assembly.
- Figure 8 shows a perspective view of an example of an aerosol generating assembly.
- the aerosol-forming layer described herein comprises an“amorphous solid”, which may alternatively be referred to as a“monolithic solid” (i.e. non-fibrous), or as a“dried gel”.
- the amorphous solid is a solid material that may retain some fluid, such as liquid, within it.
- the aerosol-forming layer comprises from about 50wt%, 60wt% or 70wt% of amorphous solid, to about 90wt%, 95wt% or l00wt% of amorphous solid.
- the aero sol- forming layer consists of amorphous solid.
- the invention provides an aerosol generating material comprising an aerosol-forming layer, the aerosol-forming layer comprising an amorphous solid, and wherein the aerosol-forming layer has a thickness of about 0.015mm to about 1.0mm.
- the thickness may be in the range of about 0.05mm, O.lmm or 0.15mm to about 0.5mm or 0.3mm.
- the inventors have found that a material having a thickness of 0.2mm is particularly suitable.
- the aerosol-forming layer may comprise more than one layer, and the thickness described herein refers to the aggregate thickness of those layers.
- the inventors have established that if the aerosol-forming layer is too thick, then heating efficiency is compromised. This adversely affects the power consumption and the timing of aerosol delivery in use. Conversely, if the aerosol-forming layer 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 inventors have established that the layer thicknesses stipulated herein optimise the material properties in view of these competing considerations.
- the thickness stipulated herein is a mean thickness for the material.
- the amorphous solid thickness may vary by no more than 25%, 20%, 15%, 10%, 5% or 1%.
- the aerosol generating material may comprise embedded heating means, such as resistive or inductive heating elements.
- the heating means may be embedded in the amorphous solid.
- the aerosol generating material may comprise a carrier on which the amorphous solid is provided.
- Figure 1 provides a schematic illustration of such an aerosol generating material.
- the laminate structure (indicated by dotted lines) includes a carrier layer 4 and an amorphous solid layer 2.
- the carrier functions as a support on which the amorphous solid layer forms, easing manufacture.
- the carrier may provide tensile strength to the amorphous solid layer, easing handling.
- the carrier may be any suitable material which can be used to support an amorphous solid.
- 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 tobacco 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 tobacco extract.
- the carrier may be magnetic. This functionality may be used to fasten the carrier to the assembly in use, or may be used to generate particular amorphous solid shapes.
- the aerosol generating material may comprise one or more magnets which can be used to fasten the material to an induction heater in use.
- the carrier may be substantially or wholly impermeable to gas and/or aerosol. This prevents aerosol or gas passage through the carrier layer, 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 surface of the carrier that abuts the amorphous solid may be porous.
- the carrier comprises paper.
- a porous carrier such as paper is particularly suitable for the present invention; the porous layer abuts the amorphous solid layer and forms a strong bond.
- the amorphous solid is formed by drying a gel and, without being limited by theory, it is thought that the slurry from which the gel is formed partially impregnates the porous carrier (e.g. paper) so that when the gel sets and forms cross-links, the carrier is partially bound into the gel. This provides a strong binding between the gel and the carrier (and between the dried gel and the carrier).
- the porous layer e.g. paper
- the porous layer may also be used to carry flavours.
- the porous layer may comprise paper, suitably having a porosity of 0-300 Coresta Units (CU), suitably 5-100 CU or 25-75 CU.
- surface roughness may contribute to the strength of bond between the amorphous material and the carrier.
- the inventors have found that the paper roughness (for the surface abutting the carrier) may suitably be in the range of 50-1000 Bekk seconds, suitably 50-150 Bekk seconds, suitably 100 Bekk seconds (measured over an air pressure interval of 50.66-48.00 kPa).
- a Bekk smoothness tester is an instrument used to determine the smoothness of a paper surface, in which air at a specified pressure is leaked between a smooth glass surface and a paper sample, and the time (in seconds) for a fixed volume of air to seep between these surfaces is the "Bekk smoothness”.
- the surface of the carrier facing away from the amorphous solid may be arranged in contact with the heater, and a smoother surface may provide more efficient heat transfer.
- the carrier is disposed so as to have a rougher side abutting the amorphous material and a smoother side facing away from the amorphous material.
- the carrier may be a paper-backed foil; the paper layer abuts the amorphous solid layer and the properties discussed in the previous paragraphs are afforded by this abutment.
- the foil backing is substantially impermeable, providing control of the aerosol flow path.
- a metal foil backing may also serve to conduct heat to the amorphous solid.
- the foil layer of the paper-backed foil abuts the amorphous solid.
- the foil is substantially impermeable, thereby preventing water provided in the amorphous solid to be absorbed into the paper which could weaken its structural integrity.
- the carrier is formed from or comprises metal foil, such as aluminium foil.
- a metallic carrier may allow for better conduction of thermal energy to the amorphous solid.
- a metal foil may function as a susceptor in an induction heating system.
- the carrier comprises a metal foil layer and a support layer, such as cardboard.
- the metal foil layer may have a thickness of less than 20mhi, such as from about 1 mhi to about IOmih, suitably about 5mih.
- the carrier may have a thickness of between about O.OlOmm, and about 2.5mm, suitably from about 0.015mm, 0.017mm 0.02mm, 0.05mm or O. lmm to about l .5mm, l .Omm, or 0.5mm.
- the amorphous solid may comprise l-60wt% of a gelling agent wherein these weights are calculated on a dry weight basis.
- the amorphous solid may comprise from about lwt%, 5wt%, l0wt%, l5wt%, 20wt% or 25wt% to about 60wt%, 50wt%, 45wt%, 40wt%, 35wt%, 30wt% or 27wt% of a gelling agent (all calculated on a dry weight basis).
- the amorphous solid may comprise l-50wt%, 5-40wt%, l0-30wt% or l5-27wt% of a gelling agent.
- the gelling agent comprises a hydrocolloid.
- the gelling agent comprises one or more compounds selected from the group comprising alginates, pectins, starches (and derivatives), celluloses (and derivatives), gums, silica or silicones compounds, clays, polyvinyl alcohol and combinations thereof.
- the gelling agent comprises one or more of alginates, pectins, 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 alginate and/or pectin, and may be combined with a setting agent (such as a calcium source) during formation of the amorphous solid.
- a setting agent such as a calcium source
- the amorphous solid may comprise a calcium-crosslinked alginate and/or a calcium-crosslinked pectin.
- the gelling agent comprises alginate, and the alginate is present in the amorphous solid in an amount of from l0-30wt% of the amorphous solid (calculated on a dry weight basis).
- alginate is the only gelling agent present in the amorphous solid.
- the gelling agent comprises alginate and at least one further gelling agent, such as pectin.
- the amorphous solid may include gelling agent comprising carrageenan.
- the amorphous solid may comprise from about 5wt%, l0wt%, l5wt%, or 20wt% to about 80wt%, 70wt%, 60wt%, 55wt%, 50wt%, 45wt% 40wt%, or 35wt% of an aerosol generating agent (all calculated on a dry weight basis).
- the aerosol generating agent may act as a plasticiser.
- the amorphous solid may comprise l0-60wt%, l5-50wt% or 20-40wt% of an aerosol generating agent.
- the aerosol generating agent comprises one or more compound selected from erythritol, propylene glycol, glycerol, triacetin, sorbitol and xylitol. In some cases, the aerosol generating agent comprises, consists essentially of or consists of glycerol.
- the inventors have established that if the content of the plasticiser is too high, the amorphous solid may absorb water resulting in a material that does not create an appropriate consumption experience in use. The inventors have established that if the plasticiser content is too low, the amorphous solid may be brittle and easily broken.
- the plasticiser content specified herein provides an amorphous solid flexibility which allows the amorphous solid sheet to be wound onto a bobbin, which is useful in manufacture of aerosol generating articles.
- the amorphous solid may comprise a flavour.
- the amorphous solid may comprise up to about 60wt%, 50wt%, 40wt%, 30wt%, 20wt%, l0wt% or 5wt% of a flavour.
- the amorphous solid may comprise at least about 0.1 wt%, 0.5wt%, lwt%, 2wt%, 5wt% l0wt%, 20wt% or 30wt% of a flavour (all calculated on a dry weight basis).
- the amorphous solid may comprise 0.1- 60wt%, l-60wt%, 5-60wt%, l0-60wt%, 20-50wt% or 30-40wt% of a flavour.
- the flavour (if present) comprises, consists essentially of or consists of menthol.
- the amorphous solid does not comprise a flavour.
- the amorphous solid additionally comprises an active substance.
- the amorphous solid additionally comprises a tobacco material and/or nicotine.
- the amorphous solid may additionally comprise powdered tobacco and/or nicotine and/or a tobacco extract.
- the amorphous solid may comprise from about lwt%, 5wt%, l0wt%, l5wt%, 20wt% or 25wt% to about 70wt%, 50wt%, 45wt% or 40wt% (calculated on a dry weight basis) of active substance.
- the amorphous solid may comprise from about lwt%, 5wt%, l0wt%, l5wt%, 20wt% or 25wt% to about 70wt%, 60wt%, 50wt%, 45wt% or 40wt% (calculated on a dry weight basis) of a tobacco material and/or nicotine.
- the amorphous solid comprises an active substance such as tobacco extract.
- the amorphous solid may comprise 5-60wt% (calculated on a dry weight basis) of tobacco extract.
- the amorphous solid may comprise from about lwt%, 5wt%, l0wt%, l5wt%, 20wt% or 25wt% to about 55wt%, 50wt%, 45wt% or 40wt% (calculated on a dry weight basis) tobacco extract.
- the amorphous solid may comprise 5-60wt%, l0-55wt% or 25- 55wt% of tobacco extract.
- the tobacco extract may contain nicotine at a concentration such that the amorphous solid comprises lwt% l .5wt%, 2wt% or 2.5wt% to about 6wt%, 5wt%, 4.5wt% or 4wt% (calculated on a dry weight basis) of nicotine. In some cases, there may be no nicotine in the amorphous solid other than that which results from the tobacco extract.
- the amorphous solid comprises no tobacco material but does comprise nicotine.
- the amorphous solid may comprise from about lwt%, 2wt%, 3wt% or 4wt% to about 20wt%, l5wt%, l0wt% or 5wt% (calculated on a dry weight basis) of nicotine.
- the amorphous solid may comprise l-20wt% or 2-5wt% of nicotine.
- the total content of active substance and/or flavour may be at least about 0.1 wt%, lwt%, 5wt%, l0wt%, 20wt%, 25wt% or 30wt%. In some cases, the total content of active substance and/or flavour may be less than about 70wt%, 60wt%, 50wt% or 40wt% (all calculated on a dry weight basis).
- the total content of tobacco material, nicotine and flavour may be at least about 0.1 wt%, lwt%, 5wt%, l0wt%, 20wt%, 25wt% or 30wt%. In some cases, the total content of tobacco material, nicotine and flavour may be less than about 70wt%, 60wt%, 50wt% or 40wt% (all calculated on a dry weight basis).
- the amorphous solid is a hydrogel and comprises less than about 20wt% of water calculated on a wet weight basis. In some cases, the hydrogel may comprise less than about l5wt%, l2wt% or l0wt% of water calculated on a wet weight basis (WWB). In some cases, the hydrogel may comprise at least about lwt%, 2wt% or at least about 5wt% of water (WWB).
- the amorphous solid may be made from a gel, and this gel may additionally comprise a solvent, included at 0.l-50wt%.
- a solvent in which the flavour is soluble may reduce the gel stability and the flavour may crystallise out of the gel.
- the gel does not include a solvent in which the flavour is soluble.
- the amorphous solid comprises less than 60wt% of a filler, such as from lwt% to 60wt%, or 5wt% to 50wt%, or 5wt% to 30wt%, or l0wt% to 20wt%.
- the amorphous solid comprises less than 20wt%, suitably less than l0wt% or less than 5wt% of a filler. In some cases, the amorphous solid comprises less than lwt% 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, cellulose and cellulose derivatives.
- the amorphous solid 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.
- fibrous filler in an amorphous solid may increase the tensile strength of the material. This may be particularly advantageous in examples wherein the amorphous solid is provided as a sheet, such as when an amorphous solid sheet circumscribes a rod of aerosolisable material.
- the amorphous solid does not comprise tobacco fibres. In particular embodiments, the amorphous solid does not comprise fibrous material.
- the aerosol generating material does not comprise tobacco fibres. In particular embodiments, the aerosol generating material does not comprise fibrous material.
- the aerosol generating substrate does not comprise tobacco fibres. In particular embodiments, the aerosol generating substrate does not comprise fibrous material.
- the aerosol generating article does not comprise tobacco fibres. In particular embodiments, the aerosol generating article does not comprise fibrous material.
- the amorphous solid may consist essentially of, or consist of a gelling agent, an aerosol generating agent, an active substance, water, and optionally a flavour.
- the amorphous solid may consist essentially of, or consist of a gelling agent, an aerosol generating agent, tobacco material and/or a nicotine source, water, and optionally a flavour.
- the aerosol generating material comprising the amorphous solid may have any suitable area density, such as from 30 g/m 2 to 120 g/m 2 .
- aerosol generating material may have an area density of from about 30 to 70 g/m 2 , or about 40 to 60 g/m 2 .
- the amorphous solid may have an area density of from about 80 to 120 g/m 2 , or from about 70 to 110 g/m 2 , or particularly from about 90 to 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).
- a second aspect of the invention provides an aerosol generating assembly comprising an aerosol generating material according to the first aspect of the invention and a heater configured to heat but not bum the aerosol generating material.
- the heater may heat, without burning, the aerosolisable material(s) to between l20°C and 350°C in use. In some cases, the heater may heat, without burning, the aerosolisable material(s) to between l40°C and 250°C in use. In some cases in use, substantially all of the amorphous solid is less than about 4mm, 3mm, 2mm or lmm from the heater. In some cases, the amorphous solid is disposed between about 0.0l7mm and 2.0mm from the heater, suitably between about O.lmm and l.Omm. In some cases, a surface of the amorphous solid may directly abut the heater.
- the heater is configured to heat not bum the aerosol generating 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.
- 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 aerosol generating assembly may additionally comprise a cooling element and/or a filter.
- the cooling element if present, 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 filter if present, may comprise any suitable filter known in the art such as a cellulose acetate plug.
- the aerosol generating assembly may be a heat-not-bum device. That is, it may contain a solid tobacco-containing material (and no liquid aerosolisable material). In some cases, the amorphous solid may comprise the tobacco material.
- a heat-not-bum 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 aerosolisable material and a liquid aerosolisable material.
- the amorphous solid may comprise nicotine.
- the amorphous solid may comprise a tobacco material.
- the amorphous solid 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 aerosolisable material may be heated by a hot aerosol which is generated from the upstream aerosolisable material.
- An electronic tobacco hybrid device is disclosed in WO 2016/135331 Al, which is incorporated by reference in its entirety.
- the invention also provides an aerosol generating article for use in an aerosol generating assembly comprising an aerosol generating material according to the first aspect of the invention.
- the article (which may be referred to herein as an aerosol generating article, a cartridge or a consumable) may be adapted for use in a THP, an electronic tobacco hybrid device or another aerosol generating device.
- the article may additionally comprise a filter and/or cooling element (which have been described above).
- the aerosol generating article may be circumscribed by a wrapping material such as paper.
- the aerosol generating article 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 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.
- the ratio of the cool air to the sum of the heated volatilised components and the cool air is at least 15%.
- a ventilation ratio of 15% enables the heated volatilised components to be made visible by the method described above. The visibility of the heated volatilised components enables the user to identify that the volatilised components have been generated and adds to the sensory experience of the smoking experience.
- the ventilation ratio is between 50% and 85% to provide additional cooling to the heated volatilised components. In some cases, the ventilation ratio may be at least 60% or 65%.
- the aerosol generating material may be included in the article/assembly in sheet form. In some cases, the aerosol generating material may be included as a planar sheet. In some cases, the 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). In some such cases, the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a sheet, such as a sheet circumscribing a rod of aerosolisable material (e.g. tobacco). In some other cases, the aerosol generating material may be formed as a sheet and then shredded and incorporated into the article. In some cases, the shredded sheet may be mixed with cut rag tobacco and incorporated into the article.
- the aerosol generating material may be formed as a sheet and then shredded and incorporated into the article. In some cases, the shredded sheet may be mixed with cut
- the amorphous solid in sheet form may have a tensile strength of from around 200 N/m to around 900 N/m. In some examples, such as where the amorphous solid does not comprise a filler, the amorphous solid may have a tensile strength of from 200 N/m to 400 N/m, or 200 N/m to 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 amorphous solid may have a tensile strength of from 600 N/m to 900 N/m, or from 700 N/m to 900 N/m, or around 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 rolled sheet, suitably in the form of a tube.
- FIG. 2 and 3 there are shown a partially cut-away section view and a perspective view of an example of an aerosol generating article 101.
- the article 101 is adapted for use with a device having a power source and a heater.
- the article 101 of this embodiment is particularly suitable for use with the device 51 shown in Figures 6 to 8, described below.
- the article 101 may be removably inserted into the device shown in Figure 6 at an insertion point 20 of the device 51.
- the article 101 of one example is in the form of a substantially cylindrical rod that includes a body of aerosol generating material 103 and a filter assembly 105 in the form of a rod.
- the aerosol generating material comprises a 0.2mm thick layer of aerosol- forming amorphous solid.
- the aerosol generating material has been incorporated as a rolled sheet (i.e. in tube form).
- the aerosol generating material may be incorporated in other forms as described above, including without limitation, as a flat sheet, as a bunched or gathered sheet, as a crimped sheet or in shredded form.
- the filter assembly 105 includes three segments, a cooling segment 107, a filter segment 109 and a mouth end segment 111.
- the article 101 has a first end 113, also known as a mouth end or a proximal end and a second end 1 15, also known as a distal end.
- the body of aerosol generating material 103 is located towards the distal end 115 of the article 101.
- the cooling segment 107 is located adjacent the body of aerosol generating material 103 between the body of aerosol generating material 103 and the filter segment 109, such that the cooling segment 107 is in an abutting relationship with the aerosol generating material 103 and the filter segment 103.
- the filter segment 109 is located in between the cooling segment 107 and the mouth end segment 111.
- the mouth end segment 111 is located towards the proximal end 113 of the article 101, adjacent the filter segment 109.
- the filter segment 109 is in an abutting relationship with the mouth end segment 111.
- the total length of the filter assembly 105 is between 37mm and 45mm, more preferably, the total length of the filter assembly 105 is 4lmm.
- the rod of aerosol generating material 103 is between 34mm and 50mm in length, suitably between 38mm and 46mm in length, suitably 42mm in length.
- the total length of the article 101 is between 71 mm and 95mm, suitably between 79mm and 87mm, suitably 83mm.
- an axial end of the body of aerosol generating material 103 is visible at the distal end 115 of the article 101.
- the distal end 115 of the article 101 may comprise an end member (not shown) covering the axial end of the body of aerosol generating material 103.
- the body of aerosol generating material 103 is joined to the filter assembly 105 by annular tipping paper (not shown), which is located substantially around the circumference of the filter assembly 105 to surround the filter assembly 105 and extends partially along the length of the body of aerosol generating material 103.
- the tipping paper is made of 58GSM standard tipping base paper.
- the tipping paper has a length of between 42mm and 50mm, suitably of 46mm.
- the cooling segment 107 is an annular tube and is located around and defines an air gap within the cooling segment.
- the air gap provides a chamber for heated volatilised components generated from the body of aerosol generating material 103 to flow.
- the cooling segment 107 is hollow to provide a chamber for aerosol accumulation yet rigid enough to withstand axial compressive forces and bending moments that might arise during manufacture and whilst the article 101 is in use during insertion into the device 51.
- the thickness of the wall of the cooling segment 107 is approximately 0.29mm.
- the cooling segment 107 provides a physical displacement between the aerosol generating material 103 and the filter segment 109.
- the physical displacement provided by the cooling segment 107 will provide a thermal gradient across the length of the cooling segment 107.
- the cooling segment 107 is configured to provide a temperature differential of at least 40 degrees Celsius between a heated volatilised component entering a first end of the cooling segment 107 and a heated volatilised component exiting a second end of the cooling segment 107.
- the cooling segment 107 is configured to provide a temperature differential of at least 60 degrees Celsius between a heated volatilised component entering a first end of the cooling segment 107 and a heated volatilised component exiting a second end of the cooling segment 107.
- the length of the cooling segment 107 is at least l5mm. In one example, the length of the cooling segment 107 is between 20mm and 30mm, more particularly 23mm to 27mm, more particularly 25mm to 27mm, suitably 25mm.
- the cooling segment 107 is made of paper, which means that it is comprised of a material that does not generate compounds of concern, for example, toxic compounds when in use adj acent to the heater of the device 51.
- the cooling segment 107 is manufactured from a spirally wound paper tube which provides a hollow internal chamber yet maintains mechanical rigidity. Spirally wound paper tubes are able to meet the tight dimensional accuracy requirements of high-speed manufacturing processes with respect to tube length, outer diameter, roundness and straightness.
- the cooling segment 107 is a recess created from stiff plug wrap or tipping paper.
- the stiff plug wrap or tipping paper is manufactured to have a rigidity that is sufficient to withstand the axial compressive forces and bending moments that might arise during manufacture and whilst the article 101 is in use during insertion into the device 51.
- the filter segment 109 may be formed of any filter material sufficient to remove one or more volatilised compounds from heated volatilised components from the aerosol generating material.
- the filter segment 109 is made of a mono- acetate material, such as cellulose acetate.
- the filter segment 109 provides cooling and irritation-reduction from the heated volatilised components without depleting the quantity of the heated volatilised components to an unsatisfactory level for a user.
- a capsule may be provided in filter segment 109. It may be disposed substantially centrally in the filter segment 109, both across the filter segment 109 diameter and along the filter segment 109 length. In other cases, it may be offset in one or more dimension.
- the capsule may in some cases, where present, contain a volatile component such as a flavourant or aerosol generating agent.
- the density of the cellulose acetate tow material of the filter segment 109 controls the pressure drop across the filter segment 109, which in turn controls the draw resistance of the article 101. Therefore the selection of the material of the filter segment 109 is important in controlling the resistance to draw of the article 101.
- the filter segment performs a filtration function in the article 101.
- the filter segment 109 is made of a 8Y15 grade of filter tow material, which provides a filtration effect on the heated volatilised material, whilst also reducing the size of condensed aerosol droplets which result from the heated volatilised material.
- the presence of the filter segment 109 provides an insulating effect by providing further cooling to the heated volatilised components that exit the cooling segment 107. This further cooling effect reduces the contact temperature of the user’s lips on the surface of the filter segment 109.
- the filter segment 109 is between 6mm to lOmm in length, suitably 8mm.
- the mouth end segment 111 is an annular tube and is located around and defines an air gap within the mouth end segment 111.
- the air gap provides a chamber for heated volatilised components that flow from the filter segment 109.
- the mouth end segment 111 is hollow to provide a chamber for aerosol accumulation yet rigid enough to withstand axial compressive forces and bending moments that might arise during manufacture and whilst the article is in use during insertion into the device 51.
- the thickness of the wall of the mouth end segment 111 is approximately 0.29mm.
- the length of the mouth end segment 111 is between 6mm to lOmm, suitably 8mm.
- the mouth end segment 111 may be manufactured from a spirally wound paper tube which provides a hollow internal chamber yet maintains critical mechanical rigidity. Spirally wound paper tubes are able to meet the tight dimensional accuracy requirements of high-speed manufacturing processes with respect to tube length, outer diameter, roundness and straightness.
- the mouth end segment 111 provides the function of preventing any liquid condensate that accumulates at the exit of the filter segment 109 from coming into direct contact with a user.
- the mouth end segment 111 and the cooling segment 107 may be formed of a single tube and the filter segment 109 is located within that tube separating the mouth end segment 111 and the cooling segment 107.
- FIGs 4 and 5 there are shown a partially cut-away section and perspective views of an example of an article 301.
- the reference signs shown in Figures 4 and 5 are equivalent to the reference signs shown in Figures 2 and 3, but with an increment of 200.
- a ventilation region 317 is provided in the article 301 to enable air to flow into the interior of the article 301 from the exterior of the article 301.
- the ventilation region 317 takes the form of one or more ventilation holes 317 formed through the outer layer of the article 301.
- the ventilation holes may be located in the cooling segment 307 to aid with the cooling of the article 301.
- the ventilation region 317 comprises one or more rows of holes, and preferably, each row of holes is arranged circumferentially around the article 301 in a cross-section that is substantially perpendicular to a longitudinal axis of the article 301.
- each row of ventilation holes may have between 12 to 36 ventilation holes 317.
- the ventilation holes 317 may, for example, be between 100 to 500mhi in diameter. In one example, an axial separation between rows of ventilation holes 317 is between 0.25mm and 0.75mm, suitably 0.5mm. In one example, the ventilation holes 317 are of uniform size. In another example, the ventilation holes 317 vary in size.
- the ventilation holes can be made using any suitable technique, for example, one or more of the following techniques: laser technology, mechanical perforation of the cooling segment 307 or pre-perforation of the cooling segment 307 before it is formed into the article 301.
- the ventilation holes 317 are positioned so as to provide effective cooling to the article 301.
- the rows of ventilation holes 317 are located at least l lmm from the proximal end 313 of the article, suitably between l7mm and 20mm from the proximal end 313 of the article 301.
- the location of the ventilation holes 317 is positioned such that user does not block the ventilation holes 317 when the article 301 is in use.
- Providing the rows of ventilation holes between l7mm and 20mm from the proximal end 313 of the article 301 enables the ventilation holes 317 to be located outside of the device 51, when the article 301 is fully inserted in the device 51, as can be seen in Figures 7 and 8.
- By locating the ventilation holes outside of the device non- heated air is able to enter the article 301 through the ventilation holes from outside the device 51 to aid with the cooling of the article 301.
- the length of the cooling segment 307 is such that the cooling segment 307 will be partially inserted into the device 51, when the article 301 is fully inserted into the device 51.
- the length of the cooling segment 307 provides a first function of providing a physical gap between the heater arrangement of the device 51 and the heat sensitive filter arrangement 309, and a second function of enabling the ventilation holes 317 to be located in the cooling segment, whilst also being located outside of the device 51, when the article 301 is fully inserted into the device 51.
- the majority of the cooling element 307 is located within the device 51. However, there is a portion of the cooling element 307 that extends out of the device 51.
- FIG. 6 there is shown an example of a device 51 arranged to heat aerosol generating material to volatilise at least one component of said aerosol generating material, typically to form an aerosol which can be inhaled.
- the device 51 is a heating device which releases compounds by heating, but not burning, the aerosol generating material.
- a first end 53 is sometimes referred to herein as the mouth or proximal end 53 of the device 51 and a second end 55 is sometimes referred to herein as the distal end 55 of the device 51.
- the device 51 has an on/off button 57 to allow the device 51 as a whole to be switched on and off as desired by a user.
- the device 51 comprises a housing 59 for locating and protecting various internal components of the device 51.
- the housing 59 comprises a uni-body sleeve 11 that encompasses the perimeter of the device 51, capped with a top panel 17 which defines generally the‘top’ of the device 51 and a bottom panel 19 which defines generally the‘bottom’ of the device 51.
- the housing comprises a front panel, a rear panel and a pair of opposite side panels in addition to the top panel 17 and the bottom panel 19.
- the top panel 17 and/or the bottom panel 19 may be removably fixed to the uni body sleeve 11, to permit easy access to the interior of the device 51, or may be “permanently” fixed to the uni-body sleeve 11, for example to deter a user from accessing the interior of the device 51.
- the panels 17 and 19 are made of a plastics material, including for example glass-filled nylon formed by injection moulding, and the uni-body sleeve 11 is made of aluminium, though other materials and other manufacturing processes may be used.
- the top panel 17 of the device 51 has an opening 20 at the mouth end 53 of the device 51 through which, in use, the article 101, 301 including the aerosol generating material may be inserted into the device 51 and removed from the device 51 by a user.
- the housing 59 has located or fixed therein a heater arrangement 23, control circuitry 25 and a power source 27.
- the heater arrangement 23, the control circuitry 25 and the power source 27 are laterally adjacent (that is, adjacent when viewed from an end), with the control circuitry 25 being located generally between the heater arrangement 23 and the power source 27, though other locations are possible.
- the control circuitry 25 may include a controller, such as a microprocessor arrangement, configured and arranged to control the heating of the aerosol generating material in the article 101, 301 as discussed further below.
- a controller such as a microprocessor arrangement
- the power source 27 may be for example a battery, which may be a rechargeable battery or a non-rechargeable battery.
- suitable batteries include for example a lithium-ion battery, a nickel battery (such as a nickel-cadmium battery), an alkaline battery and / or the like.
- the battery 27 is electrically coupled to the heater arrangement 23 to supply electrical power when required and under control of the control circuitry 25 to heat the aerosol generating material in the article (as discussed, to volatilise the aerosol generating material without causing the aerosol generating material to bum).
- An advantage of locating the power source 27 laterally adjacent to the heater arrangement 23 is that a physically large power source 25 may be used without causing the device 51 as a whole to be unduly lengthy.
- a physically large power source 25 has a higher capacity (that is, the total electrical energy that can be supplied, often measured in Amp-hours or the like) and thus the battery life for the device 51 can be longer.
- the heater arrangement 23 is generally in the form of a hollow cylindrical tube, having a hollow interior heating chamber 29 into which the article 101, 301 comprising the aerosol generating material is inserted for heating in use.
- the heater arrangement 23 may comprise a single heating element or may be formed of plural heating elements aligned along the longitudinal axis of the heater arrangement 23.
- the or each heating element may be annular or tubular, or at least part-annular or part- tubular around its circumference.
- the or each heating element may be a thin film heater.
- the or each heating element may be made of a ceramics material.
- suitable ceramics materials include alumina and aluminium nitride and silicon nitride ceramics, which may be laminated and sintered.
- Other heating arrangements are possible, including for example inductive heating, infrared heater elements, which heat by emitting infrared radiation, or resistive heating elements formed by for example a resistive electrical winding.
- the heater arrangement 23 is supported by a stainless steel support tube and comprises a polyimide heating element.
- the heater arrangement 23 is dimensioned so that substantially the whole of the body of aerosol generating material 103, 303 ofthe article 101, 301 is inserted into the heater arrangement 23 when the article 101, 301 is inserted into the device 51.
- the or each heating element may be arranged so that selected zones of the aerosol generating material can be independently heated, for example in turn (overtime, as discussed above) or together (simultaneously) as desired.
- the heater arrangement 23 in this example is surrounded along at least part of its length by a thermal insulator 31.
- the insulator 31 helps to reduce heat passing from the heater arrangement 23 to the exterior of the device 51. This helps to keep down the power requirements for the heater arrangement 23 as it reduces heat losses generally.
- the insulator 31 also helps to keep the exterior of the device 51 cool during operation of the heater arrangement 23.
- the insulator 31 may be a double-walled sleeve which provides a low pressure region between the two walls of the sleeve. That is, the insulator 31 may be for example a“vacuum” tube, i.e. a tube that has been at least partially evacuated so as to minimise heat transfer by conduction and/or convection.
- the housing 59 may further comprises various internal support structures 37 for supporting all internal components, as well as the heating arrangement 23.
- the device 51 further comprises a collar 33 which extends around and projects from the opening 20 into the interior of the housing 59 and a generally tubular chamber
- the chamber 35 which is located between the collar 33 and one end of the vacuum sleeve 31.
- the chamber 35 further comprises a cooling structure 35f, which in this example, comprises a plurality of cooling fins 35f spaced apart along the outer surface of the chamber 35, and each arranged circumferentially around outer surface of the chamber 35.
- the air gap 36 between the hollow chamber 35 and the article 101, 301 when it is inserted in the device 51 over at least part of the length of the hollow chamber 35.
- the collar 33 comprises a plurality of ridges 60 arranged circumferentially around the periphery of the opening 20 and which project into the opening 20.
- the ridges 60 take up space within the opening 20 such that the open span of the opening 20 at the locations of the ridges 60 is less than the open span of the opening 20 at the locations without the ridges 60.
- the ridges 60 are configured to engage with an article 101, 301 inserted into the device to assist in securing it within the device 51.
- Open spaces (not shown in the Figures) defined by adjacent pairs of ridges 60 and the article 101, 301 form ventilation paths around the exterior of the article 101, 301. These ventilation paths allow hot vapours that have escaped from the article 101, 301 to exit the device 51 and allow cooling air to flow into the device 51 around the article 101, 301 in the air gap 36.
- the article 101, 301 is removably inserted into an insertion point 20 of the device 51, as shown in Figures 6 to 8.
- the body o f aerosol generating material 103, 303 which is located towards the distal end 115, 315 of the article 101, 301, is entirely received within the heater arrangement 23 of the device 51.
- the proximal end 113, 313 of the article 101, 301 extends from the device 51 and acts as a mouthpiece assembly for a user.
- the heater arrangement 23 will heat the article 101, 301 to volatilise at least one component of the aerosol generating material from the body of aerosol generating material 103, 303.
- the primary flow path for the heated volatilised components from the body of aerosol generating material 103, 303 is axially through the article 101, 301, through the chamber inside the cooling segment 107, 307, through the filter segment 109, 309, through the mouth end segment 111, 313 to the user.
- the flow path also passes through the tube formed by the rolled aerosol generating material 103, 303.
- the temperature of the heated volatilised components that are generated from the body of aerosol generating material is between 60°C and 250°C, which may be above the acceptable inhalation temperature for a user.
- the heated volatilised component travels through the cooling segment 107, 307, it will cool and some volatilised components will condense on the inner surface of the cooling segment 107, 307.
- cool air will be able to enter the cooling segment 307 via the ventilation holes 317 formed in the cooling segment 307. This cool air will mix with the heated volatilised components to provide additional cooling to the heated volatilised components.
- a fourth aspect of the invention provides a method of making an aerosol generating material according to the first aspect.
- the method may comprise (a) forming a slurry comprising components of the amorphous solid or precursors thereof, (b) forming a layer of the slurry, and (c) setting the slurry to form a gel and (d) drying to form an amorphous solid.
- the step (b) of forming a layer of the slurry may comprise spraying, casting or extruding the slurry, for example.
- the layer is formed by electrospraying the slurry.
- the layer is formed by casting the slurry.
- the slurry is applied to a carrier.
- the slurry has a viscosity of from about 10 to about 20 Pa-s at 46.5 °C, such as from about 14 to about 16 Pa-s at 46.5 °C.
- the steps (b) and/or (c) and/or (d) may, at least partially, occur simultaneously (for example, during electrospraying). In some cases, these steps may occur sequentially.
- the step (c) of setting the gel may comprise the addition of a setting agent to the slurry.
- the slurry may comprise sodium, potassium or ammonium alginate as a gel-precursor, and a setting agent comprising a calcium source (such as calcium chloride), may be added to the slurry to form a calcium alginate gel.
- the total amount of the setting agent such as a calcium source, may be 0.5- 5wt% (calculated on a dry weight basis).
- the inventors have found that the addition of too little setting agent may result in an amorphous solid which does not stabilise the amorphous solid components and results in these components dropping out of the amorphous solid.
- the inventors have found that the addition of too much setting agent results in an amorphous solid that is very tacky and consequently has poor handleability.
- Alginate salts are derivatives of alginic acid and are typically high molecular weight polymers (10-600 kDa).
- Alginic acid is a copolymer of b-D-mannuronic (M) and a-L-guluronic acid (G) units (blocks) linked together with (l,4)-glycosidic bonds to form a polysaccharide.
- M b-D-mannuronic
- G a-L-guluronic acid
- the alginate crosslinks to form a gel On addition of calcium cations, the alginate crosslinks to form a gel.
- the inventors have determined that alginate salts with a high G monomer content more readily form a gel on addition of the calcium source.
- the gel-precursor may comprise an alginate salt in which at least about 40%, 45%, 50%, 55%, 60% or 70% of the monomer units in the alginate copolymer are a-L- guluronic acid (G) units.
- G guluronic acid
- the drying step may cause the cast material thickness to reduce by at least 80%, suitably 85% or 87%.
- the slurry may be cast at a thickness of 2mm, and the resulting dried amorphous solid material may have a thickness of 0.2mm.
- the slurry itself may also form part of the invention.
- the slurry solvent may consist essentially of or consist of water.
- the slurry may comprise from about 50wt%, 60wt%, 70wt%, 80wt% or 90wt% of solvent (WWB).
- the dry weight content of the slurry may match the dry weight content of the amorphous solid.
- the discussion herein relating to the solid composition is explicitly disclosed in combination with the slurry aspect of the invention.
- the amorphous solid comprises menthol.
- the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate, more preferably comprising a combination of alginate and pectin) in an amount of from about 20wt% to about 40wt%, or about 25wt% to 35wt%; menthol in an amount of from about 35wt% to about 60wt%, or from about 40wt% to 55wt%; aerosol generating agent (preferably comprising glycerol) in an amount of from about l0wt% to about 30wt%, or from about l5wt% to about 25wt% (DWB).
- gelling agent preferably comprising alginate, more preferably comprising a combination of alginate and pectin
- menthol in an amount of from about 35wt% to about 60wt%, or from about 40wt% to 55wt%
- aerosol generating agent preferably comprising glycerol
- the amorphous solid comprises about 32-33wt% of an alginate/pectin gelling agent blend; about 47-48wt% menthol flavourant; and about 19- 20wt% glycerol aerosol generating agent (DWB).
- DWB glycerol aerosol generating agent
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a shredded sheet.
- the shredded sheet may be provided in the article/assembly blended with cut tobacco.
- the amorphous solid may be provided as a non-shredded sheet.
- the shredded or non-shredded sheet has a thickness of from about 0.015mm to about lmm, preferably from about 0.02mm to about 0.07mm.
- Particular embodiments of the menthol-containing amorphous solid may be particularly suitable for including in an aerosol generating article/assembly as a sheet, such as a sheet circumscribing a rod of aerosolisable material (e.g. tobacco).
- the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate, more preferably comprising a combination of alginate and pectin) in an amount of from about 5wt% to about 40wt%, or about l0wt% to 30wt%; menthol in an amount of from about l0wt% to about 50wt%, or from about l5wt% to 40wt%; aerosol generating agent (preferably comprising glycerol) in an amount of from about 5wt% to about 40wt%, or from about l0wt% to about 35wt%; and optionally filler in an amount of up to 60wt% - for example, in an amount of from 5wt% to 20wt%, or from about 40wt% to 60wt% (DWB).
- gelling agent preferably comprising alginate, more preferably comprising a combination of alginate and pectin
- menthol in an amount of from about
- the amorphous solid comprises about 1 lwt% of an alginate/pectin gelling agent blend, about 56wt% woodpulp filler, about 18% menthol flavourant and about l5wt% glycerol (DWB). In another of these embodiments, the amorphous solid comprises about 22wt% of an alginate/pectin gelling agent blend, about l2wt% woodpulp filler, about 36% menthol flavourant and about 30wt% glycerol (DWB).
- the amorphous solid of these embodiments may be included as a sheet.
- the sheet is provided on a carrier comprising paper.
- the sheet is provided on a carrier comprising metal foil, suitably aluminium metal foil.
- the amorphous solid may abut the metal foil.
- the sheet forms part of a laminate material with a layer
- the sheet of amorphous solid has a thickness of from about 0.015mm to about lmm.
- the amorphous solid comprises a flavourant which does not comprise menthol.
- the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate) in an amount of from about 5 to about 40wt%, or from about l0wt% to about 35wt%, or from about 20wt% to about 35wt%; flavourant in an amount of from about 0.1 wt% to about 40wt%, of from about lwt% to about 30wt%, or from about lwt% to about 20wt%, or from about 5wt% to about 20wt%; aerosol generating agent (preferably comprising glycerol) in an amount of from l5wt% to 75wt%, or from about 30wt% to about 70wt%, or from about 50wt% to about 65wt%; and optionally filler (suitably woodpulp) in an amount of less than about 60wt%, or about 20wt%, or about l0wt%, or about 5wt% (preferably the amorphous solid
- the amorphous solid comprises about 27wt% alginate gelling agent, about l4wt% flavourant and about 57wt% glycerol aerosol generating agent (DWB).
- the amorphous solid comprises about 29wt% alginate gelling agent, about 9wt% flavourant and about 60wt% glycerol (DWB).
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a shredded sheet, optionally blended with cut tobacco.
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a sheet, such as a sheet circumscribing a rod of aerosolisable material (e.g. tobacco).
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a layer portion disposed on a carrier.
- the amorphous solid comprises tobacco extract.
- the amorphous solid may have the following composition (DWB): gelling agent (preferably comprising alginate) in an amount of from about 5wt% to about 40wt%, or about l0wt% to 30wt%, or about l5wt% to about 25wt%; tobacco extract in an amount of from about 30wt% to about 60wt%, or from about 40wt% to 55wt%, or from about 45wt% to about 50wt%; aerosol generating agent (preferably comprising glycerol) in an amount of from about l0wt% to about 50wt%, or from about 20wt% to about 40wt%, or from about 25wt% to about 35wt% (DWB).
- gelling agent preferably comprising alginate
- tobacco extract in an amount of from about 30wt% to about 60wt%, or from about 40wt% to 55wt%, or from about 45wt% to about 50wt
- the amorphous solid comprises about 20wt% alginate gelling agent, about 48wt% Virginia tobacco extract and about 32wt% glycerol (DWB).
- the amorphous solid of these embodiments may have any suitable water content.
- the amorphous solid may have a water content of from about 5wt% to about l5wt%, or from about 7wt% to about l3wt%, or about l0wt%.
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a shredded sheet, optionally blended with cut tobacco.
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a sheet, such as a sheet circumscribing a rod of aerosolisable material (e.g. tobacco).
- the amorphous solid of these embodiments may be included in an aerosol generating article/assembly as a layer portion disposed on a carrier.
- the amorphous solid has a thickness of from about 50 mih to about 200 mih, or about 50 mih to about 100 mih, or about 60 mih to about 90 mih, suitably about 77 mih.
- the slurry for forming this amorphous solid may also form part of the invention.
- the slurry may have an elastic modulus of from about 5 to 1200 Pa (also referred to as storage modulus); in some cases, the slurry may have a viscous modulus of about 5 to 600 Pa (also referred to as loss modulus).
- 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.
- 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.
- 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
- the active substance may comprise or be derived from one or more botanicals or constituents, derivatives or extracts thereof.
- botanical includes any material derived from plants including, but not limited to, extracts, leaves, bark, fibres, stems, roots, seeds, flowers, fruits, pollen, husk, shells or the like.
- the material may comprise an active compound naturally existing in a botanical, obtained synthetically.
- the material may be in the form of liquid, gas, solid, powder, dust, crushed particles, granules, pellets, shreds, strips, sheets, or the like.
- 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 mint may be chosen from the following mint varieties: Mentha arvensis, Mentha c.v., Mentha niliaca, Mentha piperita, Mentha piperita citrata c.v., Mentha piperita c.v., Mentha spicata crispa, Mentha cordifolia, Mentha longifolia, Mentha suaveolens variegata, Mentha pulegium, Mentha spicata c.v. and Mentha suaveolens.
- the botanical is selected from eucalyptus, star anise, cocoa and hemp.
- the botanical is selected from rooibos and fennel.
- 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 suitably comprise one or more mint-flavours suitably a mint oil from any species of the genus Mentha.
- the flavour may suitably comprise, consist essentially of or consist of menthol.
- 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, vanillyl ethyl ether and a suitable cooling agent may be, but not limited to eucalyptol, WS-3.
- an aerosol generating agent refers to an agent that promotes the generation of an aerosol.
- An aerosol generating agent may promote the generation of an aerosol by promoting an initial vaporisation and/or the condensation of a gas to an inhalable solid and/or liquid aerosol.
- Suitable aerosol generating agents include, but are not limited to: a polyol such as erythritol, sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, high boiling point hydrocarbons, acids such as lactic acid, glycerol derivatives, esters such as diacetin, triacetin, triethylene glycol diacetate, triethyl citrate or myristates including ethyl myristate and isopropyl myristate and aliphatic carboxylic acid esters such as methyl stearate, dimethyl dodecanedioate and dimethyl tetradecanedioate.
- the aerosol generating agent may suitably have a composition that does not dissolve menthol.
- the aerosol generating agent may suitably comprise, consist essentially of or consist of glycerol.
- tobacco material refers to any material comprising tobacco or derivatives therefore.
- 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.
- 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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- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Manufacture Of Tobacco Products (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
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Abstract
Description
Claims
Priority Applications (11)
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JP2021504501A JP7551594B2 (en) | 2018-07-31 | 2019-07-31 | Aerosol generation |
US17/250,498 US20210298346A1 (en) | 2018-07-31 | 2019-07-31 | Aerosol generation |
KR1020217005672A KR20210032516A (en) | 2018-07-31 | 2019-07-31 | Aerosol generation |
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US20230320406A1 (en) * | 2020-09-03 | 2023-10-12 | Nicoventures Trading Limited | Compositions and methods |
KR102513606B1 (en) * | 2021-03-29 | 2023-03-23 | 주식회사 케이티앤지 | Aerosol-generating apparatus based on laser and heating control method thereof |
WO2023134095A1 (en) * | 2022-01-14 | 2023-07-20 | 科巴特(深圳)生活科技有限公司 | Heat-not-burn aerosol generating substrate, product thereof, and preparation method therefor |
WO2023198795A1 (en) * | 2022-04-12 | 2023-10-19 | Philip Morris Products S.A. | Aerosol-generating article with relatively long rod of low density aerosol-generating substrate |
WO2023198754A1 (en) * | 2022-04-12 | 2023-10-19 | Philip Morris Products S.A. | Aerosol-generating article with long rod of aerosol-forming substrate |
WO2023198760A1 (en) * | 2022-04-12 | 2023-10-19 | Philip Morris Products S.A. | Aerosol-generating article with downstream section |
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IL280498B1 (en) | 2024-03-01 |
AU2019314884A1 (en) | 2021-01-28 |
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JP2021532749A (en) | 2021-12-02 |
JP7551594B2 (en) | 2024-09-17 |
CN112533496A (en) | 2021-03-19 |
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