EP4355123A1 - Aerosolerzeugende zusammensetzung - Google Patents
Aerosolerzeugende zusammensetzungInfo
- Publication number
- EP4355123A1 EP4355123A1 EP22740450.6A EP22740450A EP4355123A1 EP 4355123 A1 EP4355123 A1 EP 4355123A1 EP 22740450 A EP22740450 A EP 22740450A EP 4355123 A1 EP4355123 A1 EP 4355123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aerosol
- generating
- generating material
- susceptor
- tobacco
- 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
Links
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 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
- 239000000696 magnetic material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 239000002664 nootropic agent Substances 0.000 description 1
- 230000001777 nootropic effect Effects 0.000 description 1
- 239000002417 nutraceutical Substances 0.000 description 1
- 235000021436 nutraceutical agent Nutrition 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
- 239000013588 oral product Substances 0.000 description 1
- 239000010502 orange oil Substances 0.000 description 1
- 229960000292 pectin Drugs 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 230000006461 physiological response Effects 0.000 description 1
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920001296 polysiloxane Chemical class 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 235000019719 rose oil Nutrition 0.000 description 1
- 239000010666 rose oil Substances 0.000 description 1
- 235000013533 rum Nutrition 0.000 description 1
- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000000391 smoking effect Effects 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
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 239000008275 solid aerosol Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 229940032147 starch Drugs 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003860 storage Methods 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
- 239000005720 sucrose Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 235000021092 sugar substitutes Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 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
- 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
- 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
- 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
- 229940088594 vitamin Drugs 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000019163 vitamin B12 Nutrition 0.000 description 1
- 239000011715 vitamin B12 Substances 0.000 description 1
- 235000015041 whisky Nutrition 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 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
- 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
- 229960002675 xylitol Drugs 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/20—Cigarettes specially adapted for simulated smoking devices
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- 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
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
-
- 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
- A24B15/285—Treatment of tobacco products or tobacco substitutes by chemical substances characterised by structural features, e.g. particle shape or size
-
- 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
- A24B15/287—Treatment of tobacco products or tobacco substitutes by chemical substances by inorganic substances only
-
- 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
- A24B15/302—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by natural substances obtained from animals or plants
-
- 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
- A24B15/32—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by acyclic compounds
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
- A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
Definitions
- the present application relates to an aerosol-generating composition, a process for manufacturing an aerosol-generating composition and to articles comprising the aerosol-generating composition.
- Aerosol-generating systems produce an aerosol during use, which is inhaled by a user.
- tobacco heating devices heat an aerosol-generating material such as tobacco to form an aerosol by heating, but not burning, the aerosol-generating material.
- Some aerosol-generating systems include a susceptor which is configured to heat the aerosol-generating material and form the aerosol. Summary
- an aerosol-generating composition comprising aerosol-generating material comprising a binder and an aerosol former and at least one susceptor at least partially embedded in the aerosol generating material.
- the aerosol-generating material is in the form of a slurry.
- the aerosol-generating material is in the form of a sheet or cut sheet.
- the susceptor comprises a plurality of susceptor elements heatable by penetration with a varying magnetic field.
- the plurality of susceptors elements are in the form of particles, loops, spheres, strands and/or strips.
- the susceptor is in the form of a web or mesh.
- the susceptor is in the form of a fibrous sheet.
- the fibrous sheet comprises a first surface, a second surface opposite the first surface and a plurality of fibres extending from one or both of the first surface and/or the second surface, wherein the aerosol-generating material is in contact with, and at least partially covers, at least one of the first surface and/or the second surface such that one or more of the plurality of fibres is embedded in the aerosol-generating material.
- the susceptor comprises one or more closed circuits of a material heatable by penetration with a varying magnetic field.
- the binder is selected from the group consisting of: cellulosic binders, non-cellulosic binders and mixtures thereof.
- the aerosol former is selected from the group consisting of: glycerol, propylene glycerol and mixtures thereof.
- the aerosol-generating material comprises a filler.
- the filler is wood pulp.
- the aerosol-generating material comprises botanical material.
- the botanical material comprises tobacco.
- the aerosol-generating material is reconstituted tobacco.
- the aerosol-generating material is substantially free from tobacco material.
- an aerosol-generating composition comprising a first aerosol-generating material comprising a binder and an aerosol former, a second aerosol-generating material and a least one susceptor at least partially embedded in the first aerosol-generating material.
- the first aerosol-generating material comprises botanical material.
- the second aerosol-generating material comprises or consists of lamina tobacco and/or reconstituted tobacco.
- the first aerosol-generating material is substantially free from tobacco.
- an aerosol-generating composition comprising at least partially embedding a susceptor in aerosol-generating material comprising a binder and an aerosol former.
- the process comprises: combining a binder, an aerosol former, and the susceptor to form a slurry of aerosol-generating material. In some embodiments, the process comprises setting the slurry to form a gel and optionally drying the gel to form the aerosol-generating material.
- the aerosol-generating material is in the form of a sheet and the process further comprises cutting the sheet to form a plurality of discrete portions of aerosol-generating material.
- the discrete portions of aerosol-generating material comprise a plurality of strands or strips.
- An aerosol-generating material can be prepared by a process of the third aspect.
- an aerosol-generating material comprising a binder and an aerosol former and a susceptor at least partially embedded in the binder.
- a susceptor at least partially embedded in aerosol-generating material comprising binder and aerosol- former.
- an article for use in a non-combustible aerosol provision system comprising the aerosol-generating composition according to the first aspect.
- a non-combustible aerosol provision device for use with the article of the sixth aspect.
- a use of the aerosol generating composition of the first aspect to generate an aerosol there is provided a use of the aerosol generating composition of the first aspect to generate an aerosol.
- Figure 1 is a perspective view of an article for use with a non-combustible aerosol provision device
- Figures 2 and 3 are process flow diagrams showing processes for manufacturing aerosol-generating materials
- Figure 4a is a perspective view of an aerosol-generating material
- Figure 4b is a side-on cross-sectional view of the aerosol-generating material shown in Figure 4a;
- Figure 5a is a perspective view of a further aerosol-generating material;
- Figure 5b is a side-on cross-sectional view of the aerosol-generating material shown in Figure 5a;
- Figure 6a is a perspective view of a further aerosol-generating material
- Figure 6b is a side-on cross-sectional view of further article for use with a non- combustible aerosol provision device comprising the aerosol-generating material shown in Figure 6a;
- Figure 6c is a side-on cross-sectional view of an aerosol-generating component
- Figure 6d is a side-on cross-sectional view of a further article for use with a non combustible aerosol provision device comprising the aerosol-generating component shown in Figure 6c;
- Figure 7 is a side-on cross-sectional view of a further article for use with a non combustible aerosol provision device;
- FIGS 8 to 11 are schematic illustrations of non-combustible aerosol provision devices. Detailed Description
- the term “delivery system” is intended to encompass systems that deliver at least one substance to a user, and includes: combustible aerosol provision systems, such as cigarettes, cigarillos, cigars, and tobacco for pipes or for roll-your-own or for make-your-own cigarettes (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco substitutes or other smokable material); non-combustible aerosol provision systems that release compounds from an aerosol-generating material without combusting the aerosol-generating material, such as electronic cigarettes, tobacco heating products, and hybrid systems to generate aerosol using a combination of aerosol-generating materials; and 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
- a “non-combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is not combusted or burned in order to facilitate delivery of at least one substance to a user.
- the delivery system is a non-combustible aerosol provision system, such as a powered non-combustible aerosol provision system.
- the non-combustible aerosol provision system is an electronic cigarette, also known as a vaping device or electronic nicotine delivery system (END), although it is noted that the presence of nicotine in the aerosol-generating material is not a requirement.
- the non-combustible aerosol provision system is an aerosol generating material heating system, also known as a heat-not-burn system. An example of such a system is a tobacco heating system.
- the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosol-generating materials, one or a plurality of which may be heated.
- Each of the aerosol-generating materials may be, for example, in the form of a solid, liquid or gel and may or may not contain nicotine.
- the hybrid system comprises a liquid or gel aerosol-generating material and a solid aerosol-generating material.
- the solid aerosol-generating material may comprise, for example, tobacco or a non-tobacco product.
- the non-combustible aerosol provision system may comprise a non combustible aerosol provision device and a consumable for use with the non- combustible aerosol provision device.
- the disclosure relates to articles comprising aerosol-generating material and configured to be used with non-combustible aerosol provision devices. These articles are sometimes referred to as consumables throughout the disclosure.
- the non-combustible aerosol provision system such as a non combustible aerosol provision device thereof, may comprise a power source and a controller.
- the power source may, for example, be an electric power source.
- the non-combustible aerosol provision system comprises an area for receiving the article for use in the non-combustible aerosol-provision system, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/ or an aerosol-modifying agent.
- the article for use with the non-combustible aerosol provision device comprises an aerosol-generating composition comprising aerosol-generating material, an aerosol-generating composition storage area, an aerosol-generating composition transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.
- Figure 1 is a perspective view of an article 1 for use in an aerosol delivery system.
- the article 1 comprises a mouthpiece 2, and an aerosol-generating section 3, connected to the mouthpiece 2.
- the aerosol generating section 3 comprises a cylindrical rod of aerosol-generating composition.
- the article 1 comprises an upstream end 2’ and a downstream end 2” distal from upstream end 2’.
- the aerosol-generating composition comprises an aerosol-generating material comprising a binder and an aerosol former and one or more susceptors at least partially embedded in the aerosol-generating material.
- An aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way.
- the aerosol-generating material may be in the form of a solid, liquid, or semi-solid, such as a gel and may or may not contain an active substance and/ or flavourants.
- the aerosol-generating composition comprises at least one aerosol-generating material.
- the aerosol-generating material may comprise a plurality of aerosol generating materials.
- the aerosol-generating materials may be the same as each other or different to each other.
- the aerosol-generating composition may comprise a first aerosol-generating material and a second aerosol-generating material. Further (for example, third, fourth, fifth or more) aerosol-generating materials may also be included in the composition.
- At least one of the aerosol-generating materials is an aerosol-generating material comprising a binder (which may be a gelling agent) and an aerosol former.
- an active and/ or filler may also be present.
- a solvent such as water
- one or more other components of the aerosol-generating material may or may not be soluble in the solvent.
- the binder comprises or is a gelling agent.
- the binder may comprise 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 binder 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 binder comprises a hydrocolloid.
- the binder comprises alginate and/or pectin, and may be combined with a setting agent (such as a calcium source) during formation of the aerosol-generating material.
- the aerosol-generating material may comprise a calcium-crosslinked alginate and/or a calcium-crosslinked pectin.
- the binder may comprise one or more compounds selected from cellulosic binders, non-cellulosic binders, guar gum, acacia gum and mixtures thereof.
- the cellulosic binder is selected from the group consisting of: hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose (CMC), hydroxypropyl methylcellulose (HPMC), methyl cellulose, ethyl cellulose, cellulose acetate (CA), cellulose acetate butyrate (CAB), cellulose acetate propionate (CAP) and combinations thereof.
- the binder comprises (or is) one or more of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose (HPMC), carboxymethylcellulose, guar gum, or acacia gum.
- the binder comprises (or is) one or more non-cellulosic binders, including, but not limited to, agar, xanthan gum, gum Arabic, guar gum, locust bean gum, pectin, carrageenan, starch, alginate, and combinations thereof.
- the non-cellulose based binder is alginate or agar.
- the binder is present in an amount of from about 5 to 40 wt% of the aerosol-generating material, or 15 to 40 wt%. That is, the aerosol-generating material comprises the binder in an amount of about 5 to 40 wt% by dry weight of the aerosol generating material, or 15 to 40 wt%. In some examples, the aerosol-generating material comprises binder in an amount of from about 20 to 40 wt%, or about 15 wt% to 35 wt% of the aerosol-generating material. In some examples, alginate is comprised in the binder in an amount of from about 5 to 40 wt% of the aerosol-generating material, or 15 to 40 wt%.
- the aerosol generating material comprises alginate in an amount of about 5 to 40 wt% by dry weight of the aerosol-generating material, or 15 to 40wt%. In some examples, the aerosol-generating material comprises alginate in an amount of from about 20 to 40 wt%, or about 15 wt% to 35 wt% of the aerosol-generating material.
- pectin is comprised in the binder in an amount of from about 3 to 15 wt% of the aerosol-generating material. That is, the aerosol-generating material comprises pectin in an amount of from about 3 to 15 wt% by dry weight of the aerosol generating material. In some examples, the aerosol-generating material comprises pectin in an amount of from about 5 to iowt% of the aerosol-generating material.
- guar gum is comprised in the binder in an amount of from about 3 to 40 wt% of the aerosol-generating material. That is, the aerosol-generating material comprises guar gum in an amount of from about 3 to 40 wt% by dry weight of the aerosol-generating material. In some examples, the aerosol-generating material comprises guar gum in an amount of from about 5 to 10 wt% of the aerosol-generating material. In some examples, the aerosol-generating material comprises guar gum in an amount of from about 15 to 40 wt% of the aerosol-generating material, or from about 20 to 40wt%, or from about 15 to 35 wt%.
- the alginate is present in an amount of at least about 50 wt% of the binder.
- the aerosol-generating material comprises alginate and pectin, and the ratio of the alginate to the pectin is from 1:1 to 10:1.
- the ratio of the alginate to the pectin is typically >1:1, i.e. the alginate is present in an amount greater than the amount of pectin.
- the ratio of alginate to pectin is from about 2:1 to 8:1, or about 3:1 to 6:1, or is approximately 4:1.
- the aerosol-generating material may be formed by forming a slurry, which is then dried to form a solid.
- flavourant compounds for example, menthol
- the inclusion of a binder in the slurry results in the aerosol-generating material being formed from a dried gel. It has been found that, by including a binder in the aerosol-generating material, flavourant compounds, for example, menthol, are stabilised within the gel matrix allowing a higher flavourant loading to be achieved than in non-gel compositions.
- the flavouring e.g. menthol
- the flavouring is stabilised at high concentrations and the products have a good shelf life.
- the binder comprises alginate, and the binder is present in the aerosol-generating material in an amount of from 10 - 30 wt%, 20-35 wt% or 25 - 30 wt% of the slurry / aerosol-generating material (calculated on a dry weight basis).
- alginate is the only binder present in the aerosol-generating material.
- the binder comprises alginate and at least one further binder, such as pectin.
- the aerosol-generating material comprises an aerosol former.
- An "aerosol former" is an "aerosol former"
- an aerosol former material is an agent that promotes the generation of an aerosol.
- An aerosol former 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.
- an aerosol former may improve the delivery of flavour from the aerosol generating material.
- any suitable aerosol former or agents may be included in the aerosol generating material of the invention, including those described herein.
- Suitable aerosol formers include, but are not limited to: a polyol such as 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.
- a polyol such as 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,
- the aerosol former may be included in the aerosol-generating material in an amount of up to about 80 wt% of the aerosol-generating material, such as from about 0.1 wt%, 0.5 wt%, 1 wt%, 3 wt%, 5 wt%, 7 wt% or 10% to about 80 wt%, 75 wt%, 70 wt%, 65 wt%,
- the aerosol-generating material comprises an aerosol former in an amount of about 40 to 80 wt%, 40 to 75 wt%, 50 to 70 wt%, or 55 to 65 wt%.
- the aerosol former is glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.
- Glycerol maybe present in an amount of from 10 to 20% by weight of the tobacco material, for example 13 to 16% by weight of the composition, or about 14% or 15% by weight of the composition.
- Propylene glycol if present, maybe present in an amount of from 0.1 to 0.3% by weight of the composition.
- the aerosol former material may act as a plasticiser.
- the aerosol former material comprises one or more compound selected from erythritol, propylene glycol, glycerol, triacetin, sorbitol and xylitol.
- the aerosol former material comprises, consists essentially of, or consists of glycerol. It has been established that if the content of the plasticiser is too high, the aerosol-generating material may absorb water resulting in a material that does not create an appropriate consumption experience in use. It has been established that if the plasticiser content is too low, the aerosol-generating material may be brittle and easily broken.
- the plasticiser content specified herein provides an aerosol-generating material flexibility which allows the sheet to be wound onto a bobbin, which is useful in manufacture of consumables or can allow the sheet to be transported prior to shredding.
- the aerosol former may enhance the mouthfeel, as well as the organoleptic properties in general, of the aerosol produced by the aerosol-generating material when heated and inhaled by a user, particularly where the aerosol-generating material comprises relatively high quantities (e.g. >40 wt%) of aerosol former.
- the capability of aerosol generating materials to retain high quantities of aerosol former may reduce the need for other components of the aerosol-generating material, such as the expanded botanical material, to be loaded with high quantities of aerosol former. This may improve manufacturing efficiency.
- the aerosol-generating material may comprise a filler.
- the filler is generally a non tobacco component, that is, a component that does not include ingredients originating from tobacco.
- the filler component maybe a non-tobacco fibre such as wood fibre or pulp or wheat fibre.
- the filler component may also be an inorganic material such as chalk, perlite, vermiculite, diatomaceous earth, colloidal silica, magnesium oxide, magnesium sulphate, magnesium carbonate.
- the filler component may also be a non tobacco cast material or a non-tobacco extruded material.
- the filler component maybe present in an amount of o to 20% by weight of the tobacco material, or in an amount of from 1 to 10% by weight of the composition. In some embodiments, the filler component is absent.
- the aerosol-generating material comprises 5-50 wt%, 10-40 wt% or 15- 30 wt% of the filler. In some such cases the aerosol-generating material comprises at least 1 wt% of the filler, for example, at least 5 wt%, at least 10 wt%, at least 20 wt% at least 30 wt%, at least 40 wt%, or at least 50 wt% of a filler. In exemplary embodiments the aerosol-generating material comprises from 5-25 wt% of a filler comprising fibres. Suitably the filler consists of fibres, or is in the form of fibres.
- the aerosol-generating material comprises less than 60 wt% of the filler, such as from 1 wt% to 60 wt%, or 5 wt% to 50 wt%, or 5 wt% to 30 wt%, or 10 wt% to 20 wt%.
- the aerosol-generating material comprises less than 20 wt%, suitably less than 10 wt% or less than 5 wt% of the filler.
- the filler may comprise one or more organic filler materials such as wood pulp, cellulose and cellulose derivatives (such as methylcellulose, hydroxypropyl cellulose, and carboxymethyl cellulose (CMC)).
- An inorganic filler, such as calcium carbonate or chalk may be used.
- the aerosol-generating material 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 (such as methylcellulose, hydroxypropyl cellulose, and carboxymethyl cellulose (CMC)).
- CMC carboxymethyl cellulose
- fibrous filler in an aerosol-generating material may increase the tensile strength of the material.
- including a fibrous filler has been found to improve the handling of the aerosol-generating material during manufacturing.
- the resulting aerosol-generating material is less “tacky” and consequently is easier to shred during manufacturing.
- Including a fibrous filler can therefore increase manufacturing efficiency, reducing the likelihood of machine stops during shredding.
- Including a fibrous filler in the aerosol-generating material also means that the aerosol generating material is less likely to clump together (e.g. agglomerate) once it has been shredded.
- reduced agglomeration optimises the distribution of the shredded aerosol-generating material in the consumables.
- the aerosol-generating material comprises a substance to be delivered.
- the substance to be delivered may comprise one or more active constituents, one or more flavours, one or more aerosol-former materials, and/or one or more other functional materials.
- the substance to be delivered comprises an active substance.
- 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 Bi2 or C, melatonin, cannabinoids, or constituents, derivatives (including, where appropriate but not limited to, the corresponding acid forms of these materials), 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 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 maybe chosen from the following mint varieties: Mentha Arventis, Mentha c.v., Mentha niliaca, Mentha piperita, Mentha piperita citrata c.v., Mentha piperita c.v, Mentha spicata crispa, Mentha cardifolia, Memtha longifolia, Mentha suaveolens variegata, Mentha pulegium, Mentha spicata c.v. and Mentha suaveolens
- the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof.
- the botanical may be tobacco material.
- the aerosol-generating material may comprise tobacco material.
- tobacco material refers to any material comprising tobacco or derivatives or substitutes thereof.
- the tobacco material may be in any suitable form.
- 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, tobacco lamina, reconstituted tobacco and/or tobacco extract.
- the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from eucalyptus, star anise, cocoa and hemp.
- tobacco material refers to a material derived from a plant of the Nicotiana species. The selection of the plant of the Nicotiana species is not limited, and the types of tobacco or tobaccos used may vary.
- 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, leaf tobacco, tobacco stem, reconstituted tobacco and/or tobacco extract.
- leaf tobacco means cut lamina tobacco.
- the tobacco material is selected from flue-cured or Virginia, Burley, sun-cured, Maryland, dark-fired, dark air cured, light air cured, Indian air cured, Red Russian and Rustica tobaccos, and mixtures thereof, as well as various other rare or specialty tobaccos, green or cured.
- Tobacco material produced via any other type of tobacco treatment which could modify the tobacco taste is also within the scope of the present disclosure.
- tobacco plants maybe genetically engineered or crossbred to increase or decrease production of components, characteristics or attributes.
- the tobacco material is sun-cured tobacco, selected from Indian Kurnool and Oriental tobaccos, including Izmir, Basma, Samsun, Katerini, Prelip,
- the tobacco material is dark air cured tobacco, selected from Passanda, Cubano, Jatin and Besuki tobaccos. In some embodiments, the tobacco material is light air cured tobacco, selected from North Wisconsin and Galpao tobaccos. In some embodiments, the tobacco material is selected from Brazilian tobaccos, including Mata Fina and Bahia tobaccos. In some embodiments, the tobacco material is selected from criollo, Piloto Cubano, Olor, Green River, Isabela DAC, White Pata, Eluru, Jatim, Madura, Kasturi, Connecticut Seed, Broad Leaf, Connecticut, Pennsylvanian, Italian dry air cured, Paraguayan dry air cured and One Sucker tobaccos.
- plants of the Nicotiana species may be subjected to a curing process.
- Certain types of tobaccos may be subjected to alternative types of curing processes, such as fire curing or sun curing.
- harvested tobaccos that are cured are aged.
- the tobacco can be harvested in different stages of growth, for example when the plant is has reached a level of maturity and the lower leaves are ready for harvest whilst the upper leaves are still in development.
- At least one portion of the plant of the Nicotiana species (e.g., at least a portion of the tobacco material) is employed in an immature form. That is, in some embodiments, the plant, or at least one portion of that plant, is harvested before reaching a stage normally regarded as ripe or mature.
- At least a portion of the plant of the Nicotiana species is employed in a mature form. That is, in some embodiments, the plant, or at least one portion of that plant, is harvested when that plant (or plant portion) reaches a point that is traditionally viewed as being ripe, over- ripe or mature, which can be accomplished through the use of tobacco harvesting techniques conventionally employed by farmers. Both Oriental tobacco and Burley tobacco plants can be harvested. Also, the Virginia tobacco leaves can be harvested or primed depending upon their stalk position.
- the Nicotiana species maybe selected for the content of various compounds that are present in the plant. For example, plants may be selected on the basis that those plants produce relatively high quantities of one or more of the compounds desired to be isolated (i.e. the volatile compounds of interest). In certain embodiments, plants of the Nicotiana species are specifically cultivated for their abundance of leaf surface compounds. Tobacco plants may be grown in green-houses, growth chambers, or outdoors in fields, or grown hydroponically.
- the whole plant, or substantially the whole plant is harvested and employed as such.
- the term “substantially the whole plant” means that at least 90% of the plant is harvested, such as at least 95% of the plant, such as at least 99% of the plant.
- various parts or pieces of the plant are harvested or separated for further use after harvest.
- the tobacco material is selected from the leaves, stems, stalks of the plant, and various combinations of these parts.
- the tobacco material of the disclosure may thus comprise an entire plant or any portion of a plant of the Nicotiana species.
- the tobacco material may comprise or consist of reconstituted tobacco, tobacco lamina, paper reconstituted tobacco, extruded tobacco, bandcast reconstituted tobacco, or a combination of reconstituted tobacco and another form of tobacco, such as tobacco lamina or granules.
- the aerosol-generating material is substantially free from botanical material. In particular, in some embodiments, the aerosol-generating material is substantially tobacco free.
- the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from rooibos and fennel.
- the substance to be delivered comprises a flavour.
- flavour and “flavourant” refer to materials which, where local regulations permit, maybe used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers.
- flavour materials 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, whiskey, gin, tequila, rum, spearmint, peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot,
- 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 aerosol-generating material may comprise up to about 80 wt%, 70 wt%, 60 wt%, 55 wt%, 50 wt% or 45 wt% of flavourant.
- the aerosol-generating material may comprise at least about 0.1 wt%, 1 wt%, 10 wt%, 20 wt%, 30 wt%, 35 wt% or 40 wt% of flavourant (all calculated on a dry weight basis).
- the aerosol-generating material may comprise 1-80 wt%, 10-80 wt%, 20- 70 wt%, 30-60 wt%, 35-55 wt% or 30-45 wt% of flavourant.
- the aerosol-generating material comprises 35 - 50 wt% of flavourant.
- the flavourant comprises, consists essentially of or consists of menthol.
- 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 eucolyptol, WS-3.
- the aerosol-generating composition may comprise an aerosol generating material in the form of an “amorphous solid”.
- the aerosol-generating material maybe a “monolithic solid”.
- the aerosol-generating material may be a dried gel.
- the aerosol-generating composition may comprise an aerosol generating material in the form of an aerosol-generating film.
- 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 active substances, to form a slurry and then heating the slurry to volatilise at least some of the solvent to form the aerosol generating 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 film may be a continuous film or a discontinuous film, such an arrangement of discrete portions of him on a support.
- the aerosol-generating film may be substantially tobacco free.
- the aerosol-generating material may comprise or be a sheet, which may optionally be shredded to form a shredded sheet.
- the sheet of aerosolisable material may be cut lengthwise and/ or width-wise, for example in a cross-cut type shredding process, to define a cut length for the strands or strips of aerosolisable material, in addition to a cut width.
- the aerosol-generating composition may comprise any combination of the above aerosol-generating materials.
- the aerosol-generating composition may comprise a blend of aerosol-generating materials, at least one of which comprises a binder and an aerosol-former.
- the aerosol-generating composition comprises (e.g. a first) aerosol-generating material comprising a binder and an aerosol former and (e.g. a second) different aerosol-generating material.
- the second aerosol-generating material may be a botanical material, such as tobacco lamina.
- FIG 2 shows a broad outline of a process for making an aerosol-generating material.
- the aerosol-generating composition may comprise an aerosol-generating material prepared by the process depicted in Figure 2.
- the process comprises forming a slurry comprising components of the aerosol-generating material or precursors thereof, setting the slurry to form a gel and drying to form the aerosol-generating material.
- the setting the slurry at step comprises applying a setting agent to the slurry.
- a setting agent is sprayed on the slurry, such as a top surface of the slurry.
- the setting agent comprises or consists of calcium acetate, calcium formate, calcium carbonate, calcium hydrogencarbonate, calcium chloride, calcium lactate, or a combination thereof. In some embodiments, the setting agent comprises or consists of calcium formate and/or calcium lactate. In particular embodiments, the setting agent comprises or consists of calcium formate. It has been identified that, typically, employing calcium formate as a setting agent results in an aerosol-generating material having a greater tensile strength and greater resistance to elongation.
- the total amount of the setting agent such as a calcium source, may be 0.5-5 wt% (calculated on a dry weight basis). Suitably, the total amount maybe from about 1 wt%, 2.5 wt% or 4 wt% to about 4.8 wt% or 4.5 wt%. It has been found that the addition of too little setting agent may result in an aerosol-generating material which does not stabilise the aerosol-generating material components and results in these components dropping out of the aerosol-generating material. It has been found that the addition of too much setting agent results in an aerosol-generating material that is very tacky and consequently has poor handleability.
- the total amount of setting agent may therefore be from 0.5-12 wt% such as 5-10 wt%, calculated on a dry weight basis.
- the total amount may be from about 5 wt%, 6 wt% or 7 wt% to about 12 wt% or 10 wt%.
- the aerosol-generating material will not generally contain any tobacco.
- the process comprises forming a layer of the slurry. This typically comprises spraying, casting or extruding the slurry.
- the slurry layer is formed by electrospraying the slurry.
- the slurry layer is formed by casting the slurry.
- all of the steps of the process at least partially, occur simultaneously (for example, during electrospraying). In some examples, the steps of the process occur sequentially.
- the aerosol-generating material may comprise 1 to 60 wt% of a gelling agent, 0.1 to 70 wt% of an aerosol former material, 5 to 50 % of filler in the form of fibres, and 0.1 to 80 wt% of a flavourant and/or active substance.
- the aerosol-generating material may comprise 10 to 40 wt% gelling agent, 10 to 70 wt% of an aerosol former material, 20 to 40 wt% of filler and optionally 10 to 50 wt% of a flavourant.
- the aerosol-generating material comprises alginate in an amount of 32.8 wt%, glycerol in an amount of 19.2 wt% and menthol in an amount of 48 wt%. In an embodiment, the aerosol-generating material comprises alginate in amount of 26.2 wt%, glycerol in an amount of 15.4 wt%, menthol in an amount of 38.4 wt% and fibres (from wood pulp) in an amount of 20 wt%.
- the aerosol-generating material comprises alginate in an amount of 32 wt%, pectin in an amount of 8 wt% and glycerol in an amount of 60 wt%. In an embodiment, the aerosol-generating material comprises alginate in an amount of 24 wt%, pectin in an amount of 6 wt%, cellulose fibres in an amount of 10 wt% and glycerol in an amount of 60 wt%. In an embodiment, the aerosol-generating material comprises carboxymethyl cellulose (CMC) in an amount of about 7 wt%, cellulose fibres (from wood pulp) in an amount of about 43 wt % and glycerol in an amount of about 50 wt%.
- CMC carboxymethyl cellulose
- the aerosol-generating composition comprises at least one susceptor, which is heatable by using inductive heating.
- Inductive heating is a process of heating an electrically conducting object (such as a susceptor) by electromagnetic induction.
- a magnetic field generator may comprise an inductive element, for example, one or more inductor coils, and a device for passing a varying electric current, such as an alternating electric current, through the inductive element.
- the varying electric current in the inductive element produces a varying magnetic field.
- the varying magnetic field penetrates a susceptor suitably positioned with respect to the inductive element, and generates eddy currents inside the susceptor.
- the susceptor has electrical resistance to the eddy currents, and hence the flow of the eddy currents against this resistance causes the susceptor to be heated by Joule heating.
- the susceptor comprises ferromagnetic material such as iron, nickel or cobalt
- heat may also be generated by magnetic hysteresis losses in the susceptor, i.e. by the varying orientation of magnetic dipoles in the magnetic material as a result of their alignment with the varying magnetic field.
- inductive heating as compared to heating by conduction for example, heat is generated inside the susceptor, allowing for rapid heating. Further, there need not be any physical contact between the inductive heater and the susceptor, allowing for enhanced freedom in construction and application.
- the susceptor is at least partially embedded in aerosol-generating material.
- the aerosol-generating composition may comprise one or more aerosol-generating materials as described herein.
- One or more susceptor materials may be embedded in one or more of the aerosol-generating materials.
- the susceptor may be in the form of a rod, strand, strip, a continuous sheet or a discontinuous sheet, such as a mesh or web.
- the composition may comprise a single susceptor at least partially embedded in the aerosol-generating material.
- the susceptor may be in the form of a continuous sheet that is embedded in a sheet of aerosol-generating material.
- the susceptor sheet maybe completely embedded in the aerosol-generating sheet.
- the sheet of aerosol-generating material can be a planar sheet.
- the susceptor sheet may be incorporated into an aerosol-generating section of an article for use with a non-combustible aerosol provision system.
- the aerosol generating section may be, for example, in the form of a rod.
- the susceptor sheet may have a cross-sectional area that is from about i% to about 25% of the total cross- sectional area of the aerosol-generating section.
- the susceptor sheet can have a thickness of from about 150 pm to about 300 pm. Such a sheet may have a flexibility that enables it to be easily processed.
- the susceptor may be in the form of a fibrous material comprising a plurality of fibres made from a material that is heatable by penetration with a varying magnetic field.
- the fibrous sheet may comprise a first surface, a second surface opposite the first surface and a plurality of fibres extending from one or both of the first surface and/ or the second surface, wherein the aerosol-generating material is in contact with, and at least partially covers, at least one of the first surface and/or the second surface such that one or more of the plurality of fibres is embedded in the aerosol-generating material.
- Such fibrous sheets typically have a high surface area to volume ratio which may increase the rate of heat transfer from the fibrous material to the aerosol-generating material that it is in embedded in.
- the susceptor may be in the form of a closed circuit of magnetic electrically-conductive material. This may improve magnetic coupling between the susceptor and a magnetic field generator of an aerosol-provision device in use to provide greater or improved heating.
- the sheet may be cut or shredded to form an aerosol-generating composition comprising a plurality of strands or strips of aerosol-generating material with the susceptor embedded in them.
- the susceptor may comprise or consist of a plurality of discrete susceptor elements that are made from a material that is heatable by penetration with a varying magnetic field.
- the susceptor may comprise a plurality of strands or strips.
- the susceptor elements are particulate or granular.
- the particles may have a variety of geometries.
- the susceptor elements maybe in the form of beads, flakes, particles, shards, rods, tubes, plates, coils, rings or loops, for example.
- the susceptor elements may be distributed homogenously throughout the aerosol generating material. This may allow for even heating of the aerosol-generating material.
- the susceptor elements may be aligned magnetically with each other. That is, magnetic dipoles within the suceptor elements may be aligned magnetically with each other. When the suceptor elements are aligned magnetically with each other may improve electromagnetic coupling between the susceptor elements and a magnetic field generator of an aerosol-provision device.
- the susceptor is at least partially embedded in the aerosol-generating material. In some embodiments, the susceptor is fully embedded in the aerosol-generating material such that it is completely surrounded by the aerosol-generating material.
- the susceptor maybe in direct contact with the aerosol-generating material. At least partially embedding the susceptor in the aerosol-generating material allows for a rapid rate of heat transfer between the susceptor material and the aerosol-generating material. This may improve the rate at which the aerosol-generating material heats up and generates aerosol in use.
- the aerosol-generating composition may comprise two or more susceptors. All of the susceptors may be at least partially embedded in the aerosol generating material. Alternatively, one or more of the suceptors may be at least partially embedded in the aerosol-generating material.
- aerosol generating composition may comprise a first susceptor in the form of a continuous sheet fully embedded in the aerosol-generating material and a second susceptor comprising a plurality of discrete susceptor elements as described herein.
- the susceptor may be embedded in the aerosol -generating material by any suitable means.
- the aerosol-generating may added to the slurry formed during manufacture of the aerosol-generating material according to the processes described herein. For example, the aerosol-generating material can be combined with the binder and the aerosol former in the slurry. Drying of the slurry then produces the aerosol-generating material with the susceptor at least partially embedded in it.
- Figure 3 shows one such process of embedding the susceptor in the aerosol-generating material is depicted.
- the process comprises forming a slurry comprising components of the aerosol-generating material or precursors thereof and the susceptor, forming a layer of the slurry setting the slurry to form a gel and drying to form the aerosol generating material with the susceptor embedded in it.
- setting the slurry comprises applying a setting agent to the slurry, as described previously in relation to the preparation of the aerosol-generating material.
- the susceptor is at least partially embedded in the aerosol generating material by pressing a surface of the susceptor against a surface of the aerosol-generating material using pressure that is sufficient to embed the susceptor in the aerosol-generating material.
- the aerosol-generating material maybe in the form of a sheet of aerosol-generating material comprising a planar surface and the susceptor, which may be in any form, may be pressed against the planar surface with a force sufficient to at least partially embed the susceptor in the planar surface of the aerosol-generating material.
- the susceptor is at least partially embedded in the aerosol-generating material, it may be unnecessary to use a separate susceptor to heat the aerosol-generating material when it is incorporated into an article for use in a non-combustible aerosol-provision system.
- a proportion of the susceptor may be completely embedded in the aerosol-generating material. Where the susceptor is completely embedded in the aerosol-generating material it is surrounded by and in direct contact with the aerosol-generating material. At least about 40%, 50%, 60%, 70%, 80%, 90% or about 100% of a surface area of the susceptor may be completely surrounded by and in direct contact with the aerosol- generating material.
- a proportion of the susceptor may be only partially embedded in the aerosol-generating material.
- the susceptor is partially embedded in the aerosol-generating material, at least a portion of the susceptor element is not in in direct contact with the aerosol-generating material. At least about 40%, 50%, 60%, 70%, 80%, 90% or about 100% of the susceptor may be partially surrounded by and in direct contact with the aerosol-generating material.
- the aerosol-generating composition comprises at least one aerosol-generating material.
- the aerosol-generating composition may consist of aerosol-generating material and the susceptor.
- the aerosol-generating composition comprises a mixture of two or more different aerosol-generating materials.
- the aerosol-generating material may comprise a first aerosol-generating material and a second aerosol-generating material.
- the susceptor is embedded in one or more of the aerosol-generating materials.
- the aerosol-generating composition comprises a first and a second aerosol-generating material, the first aerosol-generating material comprising a binder and an aerosol-former, and a susceptor is at least partially embedded in the first aerosol-generating material.
- the second aerosol-generating material maybe any of the aerosol-generating materials described herein.
- the second aerosol generating material may be reconstituted tobacco or lamina tobacco.
- Figure 4a is a perspective view of a sheet of aerosol-generating material 4 and a susceptor in the form of a plurality of susceptor elements 5 at least partially embedded in the aerosol-generating material 4.
- the susceptor elements are in the form of closed loops at least partially embedded in the sheet of aerosol generating material.
- Figure 4b depicts a side-on cross-sectional view of the sheet of aerosol-generating material 4 shown in Figure 4.
- the sheet comprises a first surface 6a and a second surface 6b.
- the susceptor elements 7 are at least partially embedded in, and distributed throughout, the sheet of aerosol-generating material 4. Some of the susceptor elements 7 are completely surrounded by the aerosol-generating material, whilst others protrude from the first surface 6a or the second surface 6b of the sheet of aerosol-generating material 4.
- Figure 5a is a perspective view of a sheet of aerosol-generating material 44 and a susceptor 55 (shown by the dotted lines), which is fully embedded in the sheet of aerosol-generating material 44.
- the susceptor 55 is in the form of a planar continuous sheet of material. In other embodiments, the susceptor 55 may be in the form of a planar mesh or web. Such forms may improve adhesion between the aerosol generating material 44 and the susceptor 55.
- Figure 5b is a side-on cross-sectional view of the sheet of aerosol-generating material 44 and the susceptor 55 (shown using dotted lines), which is fully embedded in the centre of the sheet of aerosol-generating material 44.
- the sheets of aerosol-generating material 4, 44 shown in Figures 4a, 4b, 5a and 5b can be shredded to form shredded sheets of aerosol-generating material within which the susceptors are embedded.
- the shredded sheets can be incorporated into an aerosol- generating section of an article 1 for use with a non-combustion aerosol provision device.
- the sheets of aerosol-generating material may be used as an inner wrap in an article for use in a non-combustible aerosol-provision device.
- the aerosol-generating material may be a continuous sheet of material that circumscribes a rod comprising other aerosol-generating materials of the aerosol-generating composition, such as botanical material (e.g. lamina and/or reconstituted tobacco).
- Figure 6a is a perspective view of the sheet of aerosol-generating material that has been shredded to form discrete portions 8 of aerosol-generating material.
- the susceptor elements 7 are embedded in the discrete portions 8 of aerosol-generating material.
- Figure 6b is a side-on cross-sectional view of an article la for use with a non- combustible aerosol-provision device comprising a mouthpiece 2a, an aerosol generating section 3a and the discrete portions 8 of aerosol-generating material shown in Figure 6a.
- the discrete portions 8 of aerosol-generating material are longitudinally aligned with one another.
- Figure 6c is a side-on cross-sectional view of an aerosol-generating component 555a comprising a susceptor comprising three susceptor elements 555 joined by a portions of joining material 666.
- the three susceptor elements are in the form of spheres and the portions of joining material 666 is are in the form of strands.
- Both the susceptor elements 555 and the portions of joining material 666 are embedded in an aerosol generating material 444 such that the aerosol-generating material completely surrounds the susceptor elements 555 and the portion of joining material 666.
- the susceptor elements 555 can be made from any material that is heatable by exposure to a varying magnetic field.
- the portions of joining material 666 can also be made from such a material. Although three susceptor elements are depicted, in some embodiments, the component 555a may comprise additional susceptor elements.
- the portions of material 666 can be relatively flexible and be relatively weak to enable them to be easily cut.
- the aerosol-generating component 555a can be formed from a continuous reel comprising a plurality of aerosol-generating components 555a joined together by further portions of material 666. An aerosol-generating component 555a can be cut to the desired length by cutting the portions of joining material 666.
- Figure 6d is a side-on cross-sectional view of an article lb for use with a non combustible aerosol-provision device comprising a mouthpiece 2b, an aerosol generating section 3b and an aerosol-generating composition comprising aerosol generating component 555a, as shown in Figure 6c.
- the aerosol-generating composition also comprises other aerosol-generating materials (not shown).
- Figure 7 shows a side-on cross-sectional view of the article 1 shown in Figure 1.
- the article 1 comprises a mouthpiece 2, and an aerosol-generating section 3, connected to the mouthpiece 2.
- the aerosol generating 3 section comprises a cylindrical rod of aerosol-generating composition 3.
- the article 1 comprises an upstream end 2’ and a downstream end 2” distal from the rod of aerosol-generating material 3.
- the cylindrical rod of aerosol-generating composition comprising comprises a plurality of strands and/or strips of aerosol-generating material 3, and is circumscribed by a wrapper 9.
- the wrapper 9 is a moisture impermeable wrapper.
- the plurality of strands or strips of aerosol-generating material may be aligned within the aerosol-generating section such that their longitudinal dimension is in parallel alignment with a longitudinal axis, X-X’ of the article 1.
- the strands or strips may generally be arranged such that their longitudinal dimension aligned is transverse to the longitudinal axis of the article.
- At least about 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% or 95 % of the plurality of strands or strips may be arranged such that their longitudinal dimension is in parallel alignment with the longitudinal axis of the article.
- a majority of the strands or strips maybe arranged such that their longitudinal dimensions are in parallel alignment with the longitudinal axis of the article.
- about 95% to about 100% of the plurality of strands or strips are arranged such that their longitudinal dimension is in parallel alignment with the longitudinal axis of the article.
- substantially all of the strands or strips are arranged in the aerosol-generating section such that their longitudinal dimension is in parallel alignment with the longitudinal axis of the aerosol-generating section of the article.
- the mouthpiece 2 includes a cooling section 10, also referred to as a cooling element, positioned immediately downstream of and adjacent to the source of aerosol generating composition 3.
- the cooling section 10 is in an abutting relationship with the source of aerosol-generating material.
- the mouthpiece 2 also includes, in the present example, a body of material 11 downstream of the cooling section 10, and a hollow tubular element 12 downstream of the body of material 11, at the mouth end of the article 1.
- the cooling section 10 comprises a hollow channel, having an internal diameter of between about 1 mm and about 4 mm, for example between about 2 mm and about 4 mm. In the present example, the hollow channel has an internal diameter of about 3 mm.
- the hollow channel extends along the full length of the cooling section 10.
- the cooling section 10 comprises a single hollow channel. In alternative embodiments, the cooling section can comprise multiple channels, for example, 2, 3 or 4 channels.
- the single hollow channel is substantially cylindrical, although in alternative embodiments, other channel geometries/cross-sections maybe used.
- the hollow channel can provide a space into which aerosol drawn into the cooling section 10 can expand and cool down.
- the cooling section is configured to limit the cross-sectional area of the hollow channel/s, to limit tobacco displacement into the cooling section, in use.
- the cooling section 10 preferably has a wall thickness in a radial direction, which can be measured, for example, using a calliper.
- the wall thickness of the cooling section to, for a given outer diameter of cooling section defines the internal diameter for the cavity surrounded by the walls of the cooling section to.
- the cooling section to to can have a wall thickness of at least about 1.5 mm and up to about 2 mm. In the present example, the cooling section 10 has a wall thickness of about 2 mm.
- the inventors have advantageously found that providing a cooling section 10 having a wall thickness within this range improves the retention of the source of aerosol-generating material in the aerosol generating section, in use, by reducing the longitudinal displacement of strands and/ or strips of aerosol-generating material when the aerosol generator is inserted into the article.
- the cooling section 10 is formed from filamentary tow. Other constructions can be used, such as a plurality of layers of paper which are parallel wound, with butted seams, to form the cooling section 10; or spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mache type process, moulded or extruded plastic tubes or similar.
- the cooling section 10 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 1 is in use.
- the wall material of the cooling section 10 can be relatively non-porous, such that at least 90% of the aerosol generated by the aerosol generating material 3 passes longitudinally through the one or more hollow channels rather than through the wall material of the cooling section 10. For instance, at least 92% or at least 95% of the aerosol generated by the aerosol generating material 3 can pass longitudinally through the one or more hollow channels.
- the filamentary tow forming the cooling section 10 preferably has a total denier of less than 45,000, more preferably less than 42,000. This total denier has been found to allow the formation of a cooling section 10 which is not too dense.
- the total denier is at least 20,000, more preferably at least 25,000.
- the filamentary tow forming the cooling section 10 has a total denier between 25,000 and 45,000, more preferably between 35,000 and 45,000.
- the cross- sectional shape of the filaments of tow are ⁇ ’ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used.
- the filamentary tow forming the cooling section to preferably has a denier per filament of greater than 3.
- the denier per filament has been found to allow the formation of a tubular element 12 which is not too dense.
- the denier per filament is at least 4, more preferably at least 5.
- the filamentary tow forming the hollow tubular element 12 has a denier per filament between 4 and 10, more preferably between 4 and 9.
- the filamentary tow forming the cooling section 10 has an Y40,ooo tow formed from cellulose acetate and comprising 18% plasticiser, for instance triacetin.
- the density of the material forming the cooling section 10 is at least about 0.20 grams per cubic centimetre (g/cc), more preferably at least about 0.25 g/cc.
- the density of the material forming the cooling section 10 is less than about 0.80 grams per cubic centimetre (g/cc), more preferably less than 0.6 g/cc. In some embodiments, the density of the material forming the cooling section 10 is between 0.20 and 0.8 g/cc, more preferably between 0.3 and 0.6 g/cc, or between 0.4 g/cc and
- the "density" of the material forming the cooling section 10 refers to the density of any filamentary tow forming the element with any plasticiser incorporated. The density may be determined by dividing the total weight of the material forming the cooling section 10 by the total volume of the material forming the cooling section 10, wherein the total volume can be calculated using appropriate measurements of the material forming the cooling section 10 taken, for example, using callipers. Where necessary, the appropriate dimensions may be measured using a microscope.
- the length of the cooling section 10 is less than about 30 mm. More preferably, the length of the cooling section 10 is less than about 25 mm. Still more preferably, the length of the cooling section 10 is less than about 20 mm. In addition, or as an alternative, the length of the cooling section 10 is preferably at least about 10 mm. Preferably, the length of the cooling section 10 is at least about 15 mm. In some preferred embodiments, the length of the cooling section 10 is from about 15 mm to about 20 mm, more preferably from about 16 mm to about 19 mm. In the present example, the length of the cooling section 10 is 19 mm.
- the cooling section 10 is located around and defines an air gap within the mouthpiece 2 which acts as a cooling section.
- the air gap provides a chamber through which heated volatilised components generated by the rod of aerosol-generating material 3 flow.
- the cooling section 10 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 1 is in use.
- the cooling section 10 provides a physical displacement between the aerosol-generating material 3 and the body of material 11.
- the physical displacement provided by the cooling section 10 can provide a thermal gradient across the length of the cooling section 10.
- the mouthpiece 2 comprises a cavity having an internal volume greater than 110 mm3. Providing a cavity of at least this volume has been found to enable the formation of an improved aerosol.
- the mouthpiece 2 comprises a cavity, for instance formed within the cooling section 10, having an internal volume greater than 110 mm 3 , and still more preferably greater than 130 mm 3 , allowing further improvement of the aerosol.
- the internal cavity comprises a volume of between about 130 mm 3 and about 230 mm 3 , for instance about 134 mm 3 or 227 mm 3 .
- the cooling section 10 can be configured to provide a temperature differential of at least 40 degrees Celsius between a heated volatilised component entering a first, upstream end of the cooling section 10 and a heated volatilised component exiting a second, downstream end of the cooling section 10.
- the cooling section 10 is preferably configured to provide a temperature differential of at least 60 degrees Celsius, preferably at least 80 degrees Celsius and more preferably at least too degrees Celsius between a heated volatilised component entering a first, upstream end of the cooling section 10 and a heated volatilised component exiting a second, downstream end of the cooling section 10. This temperature differential across the length of the cooling section 10 protects the temperature sensitive body of material 11 from the high temperatures of the aerosol-generating material 3 when it is heated.
- the aerosol-generating section When in use, the aerosol-generating section may exhibit a pressure drop of from about 15 to about 40 mm H 2 0. In some embodiments, the aerosol-generating section exhibits a pressure drop across the aerosol-generating section of from about 15 to about 30 mm H O.
- the aerosol-generating material may have a packing density of between about 400 mg/ cm3 and about 900 mg/ cm3 within the aerosol-generating section. A packing density higher than this may increase the pressure drop. At least about 70% of a volume of the aerosol-generating section is filled with the aerosol-generating material. In some embodiments, from about 75% to about 85% of the volume of the cavity is filled with the aerosol-generating material.
- the wrapper 9 comprises a paper wrapper, optionally comprising a barrier coating to make the material of the wrapper substantially moisture impermeable.
- Aluminium foil has been found to be particularly effective at enhancing the formation of aerosol within the aerosol-generating material 3.
- the aluminium foil has a metal layer having a thickness of about 6 pm.
- the aluminium foil has a paper backing.
- the aluminium foil can be other thicknesses, for instance between 4 pm and 16 pm in thickness.
- the aluminium foil also need not have a paper backing, but could have a backing formed from other materials, for instance to help provide an appropriate tensile strength to the foil, or it could have no backing material.
- Metallic layers or foils other than aluminium can also be used.
- the total thickness of the wrapper is preferably between 20 pm and 60 pm, more preferably between 30 pm and 50 pm, which can provide a wrapper having appropriate structural integrity and heat transfer characteristics.
- the tensile force which can be applied to the wrapper before it breaks can be greater than 3,000 grams force, for instance between 3,000 and 10,000 grams force or between 3,000 and 4,500 grams force.
- the wrapper comprises paper or a paper backing, i.e.
- the wrapper can have a basis weight greater than about 30 gsm.
- the wrapper can have a basis weight in the range from about 40 gsm to about 70 gsm.
- Such basis weights provide an improved rigidity to the rod of aerosol-generating material.
- the improved rigidity provided by wrappers having a basis weight in this range can make the rod of aerosol-generating material 3 more resistant to crumpling or other deformation under the forces to which the article is subject, in use.
- Providing a rod of aerosol-generating material having increased rigidity can be beneficial where the plurality of strands or strips of aerosol generating material are aligned within the aerosol-generating section such that their longitudinal dimension is in parallel alignment with the longitudinal axis, since longitudinally aligned strands or strips of aerosol-generating material may provide less rigidity to the rod of aerosol generating material than when the strands or strips are not aligned.
- the improved rigidity of the rod of aerosol-generating material allows the article to withstand the increased forces to which the article is subject, in use.
- the moisture impermeable wrapper 9 is also substantially impermeable to air.
- the wrapper 9 preferably has a permeability of less than too Coresta Units, more preferably less than 60 Coresta Units. It has been found that low permeability wrappers, for instance having a permeability of less than too Coresta Units, more preferably less than 60 Coresta Units, result in an improvement in the aerosol formation in the aerosol-generating material 3. Without wishing to be bound by theory, it is hypothesised that this is due to reduced loss of aerosol compounds through the wrapper 9.
- the permeability of the wrapper 9 can be measured in accordance with ISO 2965:2009 concerning the determination of air permeability for materials used as cigarette papers, filter plug wrap and filter joining paper.
- the body of material 11 and hollow tubular element 12 each define a substantially cylindrical overall outer shape and share a common longitudinal axis.
- the body of material 11 is wrapped in a first plug wrap 13.
- the first plug wrap 13 has a basis weight of less than 50 gsm, more preferably between about 20 gsm and 40 gsm.
- the first plug wrap 13 has a thickness of between 30 pm and 60 pm, more preferably between 35 pm and 45 pm.
- the first plug wrap 13 is a non-porous plug wrap, for instance having a permeability of less than too Coresta units, for instance less than 50 Coresta units.
- the first plug wrap 13 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta Units.
- the length of the body of material 11 is less than about 15 mm. More preferably, the length of the body of material 11 is less than about 12 mm. In addition, or as an alternative, the length of the body of material 11 is at least about 5 mm. Preferably, the length of the body of material 11 is at least about 8 mm. In some preferred embodiments, the length of the body of material 11 is from about 5 mm to about 15 mm, more preferably from about 6 mm to about 12 mm, even more preferably from about 6 mm to about 12 mm, most preferably about 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. In the present example, the length of the body of material 11 is 10 mm.
- the body of material 11 is formed from filamentary tow.
- the tow used in the body of material 11 has a denier per filament (d.p.f.) of 5 and a total denier of 25,000.
- the tow comprises plasticised cellulose acetate tow.
- the plasticiser used in the tow comprises about 9% by weight of the tow.
- the plasticiser is triacetin.
- different materials can be used to form the body of material 11.
- the body 11 can be formed from paper, for instance in a similar way to paper filters known for use in cigarettes.
- the paper, or other cellulose- based material can be provided as one or more portions of sheet material which is folded and/or crimped to form body 11.
- the sheet material can have a basis weight of from I5gsm to 6ogsm, for instance between 20 and 50 gsm.
- the sheet material can, for instance, have a basis weight in any of the ranges between 15 and 25 gsm, between 25 and 30 gsm, between 30 and 40 gsm, between 40 and 45 gsm and between 45 and 50 gsm.
- the sheet material can have a width of between 50mm and 200mm, for instance between 60mm and 150mm, or between 80mm and 150mm.
- the sheet material can have a basis weight of between 20 and 50 gsm and a width between 80mm and 150mm. This can, for instance, enable the cellulose-based bodies to have appropriate pressure drops for an article having dimensions as described herein.
- the body 11 can be formed from tows other than cellulose acetate, for instance polylactic acid (PLA), other materials described herein for filamentary tow or similar materials.
- the tow is preferably formed from cellulose acetate.
- the tow, whether formed from cellulose acetate or other materials, preferably has a d.p.f. of at least 5.
- the tow has a denier per filament of no more than 12 d.p.f., preferably no more than 11 d.p.f. and still more preferably no more than 10 d.p.f.
- the total denier of the tow forming the body of material 11 is preferably at most 30,000, more preferably at most 28,000 and still more preferably at most 25,000.
- the tow preferably has a total denier of at least 8,000 and more preferably at least 10,000.
- the denier per filament is between 5 and 12 while the total denier is between 10,000 and 25,000.
- the cross-sectional shape of the filaments of tow are ⁇ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used, with the same d.p.f. and total denier values as provided herein.
- the pressure drop across body 11 can, for instance, be between 0.3 and smmWG per mm of length of the body 11, for instance between o.smmWG and 2mmWG per mm of length of the body 11.
- the pressure drop can, for instance, be between 0.5 and immWG/mm of length, between 1 and i.5mmWG/mm of length or between 1.5 and 2mmWG/mm of length.
- the total pressure drop across body 11 can, for instance, be between 3mmWG and 8mWG, or between 4mmWG and 7mmWG.
- the total pressure drop across body 11 can be about 5, 6 or 7mmWG.
- the mouthpiece 2 of the article 1 comprises an upstream end 2’ adjacent to the rod of aerosol-generating material 3 and a downstream end 2” distal from the rod of aerosol-generating material 3.
- the mouthpiece 2 has a hollow tubular element 12 formed from filamentary tow. This has advantageously been found to significantly reduce the temperature of the outer surface of the mouthpiece 2 at the downstream end 2” of the mouthpiece which comes into contact with a consumer’s mouth when the article 1 is in use.
- the use of the tubular element 12 has also been found to significantly reduce the temperature of the outer surface of the mouthpiece 2 even upstream of the tubular element 12. Without wishing to be bound by theory, it is hypothesised that this is due to the tubular element 12 channelling aerosol closer to the centre of the mouthpiece 2, and therefore reducing the transfer of heat from the aerosol to the outer surface of the mouthpiece 2.
- the "wall thickness" of the hollow tubular element 12 corresponds to the thickness of the wall of the tube 10 in a radial direction. This may be measured, for example, using a calliper.
- the wall thickness is advantageously greater than 0.9 mm, and more preferably 1.0mm or greater.
- the wall thickness is substantially constant around the entire wall of the hollow tubular element 12.
- the wall thickness is preferably greater than 0.9 mm at any point around the hollow tubular element 12, more preferably 1.0mm or greater.
- the wall thickness of the hollow tubular element 12 is about 1.3 mm.
- the length of the hollow tubular element 12 is less than about 20 mm.
- the length of the hollow tubular element 12 is less than about 15 mm. Still more preferably, the length of the hollow tubular element 12 is less than about 10 mm. In addition, or as an alternative, the length of the hollow tubular element 12 is at least about 5 mm. Preferably, the length of the hollow tubular element 12 is at least about 6 mm. In some preferred embodiments, the length of the hollow tubular element 12 is from about 5 mm to about 20 mm, more preferably from about 6 mm to about 10 mm, even more preferably from about 6 mm to about 8 mm, most preferably about 6 mm, 7 mm or about 8 mm. In the present example, the length of the hollow tubular element 12 is 7 mm.
- the density of the hollow tubular element 12 is at least about 0.25 grams per cubic centimetre (g/cc), more preferably at least about 0.3 g/cc.
- the density of the hollow tubular element 12 is less than about 0.75 grams per cubic centimetre (g/cc), more preferably less than 0.6 g/cc.
- the density of the hollow tubular element 12 is between 0.25 and 0.75 g/cc, more preferably between 0.3 and 0.6 g/cc, and more preferably between 0.4 g/cc and 0.6 g/cc or about 0.5 g/cc.
- the "density" of the hollow tubular element 12 refers to the density of the filamentary tow forming the element with any plasticiser incorporated. The density may be determined by dividing the total weight of the hollow tubular element 12 by the total volume of the hollow tubular element 12, wherein the total volume can be calculated using appropriate measurements of the hollow tubular element 12 taken, for example, using callipers. Where necessary, the appropriate dimensions may be measured using a microscope.
- the filamentary tow forming the hollow tubular element 12 preferably has a total denier of less than 45,000, more preferably less than 42,000. This total denier has been found to allow the formation of a tubular element 12 which is not too dense.
- the total denier is at least 20,000, more preferably at least 25,000.
- the filamentary tow forming the hollow tubular element 12 has a total denier between 25,000 and 45,000, more preferably between 35,000 and 45,000.
- the cross-sectional shape of the filaments of tow are ⁇ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used.
- the filamentary tow forming the hollow tubular element 12 preferably has a denier per filament of greater than 3. This denier per filament has been found to allow the formation of a tubular element 12 which is not too dense.
- the denier per filament is at least 4, more preferably at least 5.
- the filamentary tow forming the hollow tubular element 12 has a denier per filament between 4 and 10, more preferably between 4 and 9.
- the filamentary tow forming the hollow tubular element 12 has an 7 ⁇ 3U3 ⁇ ,000 tow formed from cellulose acetate and comprising 18% plasticiser, for instance triacetin.
- the hollow tubular element 12 preferably has an internal diameter of greater than 3.0mm. Smaller diameters than this can result in increasing the velocity of aerosol passing though the mouthpiece 2 to the consumers mouth more than is desirable, such that the aerosol becomes too warm, for instance reaching temperatures greater than 40°C or greater than 45°C. More preferably, the hollow tubular element 12 has an internal diameter of greater than 3.1mm, and still more preferably greater than 3.5mm or 3.6mm. In one embodiment, the internal diameter of the hollow tubular element 12 is about 4.7 mm.
- the hollow tubular element 12 preferably comprises from 15% to 22% by weight of plasticiser.
- the plasticiser is preferably triacetin, although other plasticisers such as polyethelyne glycol (PEG) can be used. More preferably, the hollow tubular element 12 comprises from 16% to 20% by weight of plasticiser, for instance about 17%, about 18% or about 19% plasticiser.
- the first hollow tubular element 12, body of material 11 and cooling section 10 are combined using a second plug wrap 14 which is wrapped around all three sections.
- the second plug wrap 14 has a basis weight of less than 50 gsm, more preferably between about 20 gsm and 45 gsm.
- the second plug wrap 14 has a thickness of between 30 pm and 60 pm, more preferably between 35 pm and 45 pm.
- the second plug wrap 14 is preferably a non-porous plug wrap having a permeability of less than too Coresta Units, for instance less than 50 Coresta Units.
- the second plug wrap 14 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta Units.
- the article 1 has an outer circumference of about 23 mm.
- the article can be provided in any of the formats described herein, for instance having an outer circumference of between 20mm and 26mm. Since the article is to be heated to release an aerosol, improved heating efficiency can be achieved using articles having lower outer circumferences within this range, for instance circumferences of less than 23mm. To achieve improved aerosol via heating, while maintaining a suitable product length, article circumferences of greater than 19mm have also been found to be particularly effective. Articles having circumferences of between 20mm and 24mm, and more preferably between 20mm and 23mm, have been found to provide a good balance between providing effective aerosol delivery while allowing for efficient heating.
- a tipping paper 15 is wrapped around the full length of the mouthpiece 2 and over part of the rod of aerosol-generating material 3 and has an adhesive on its inner surface to connect the mouthpiece 2 and rod 3.
- the rod of aerosol generating material 3 is wrapped in wrapper 9, which forms a first wrapping material
- the tipping paper 15 forms an outer wrapping material which extends at least partially over the rod of aerosol-generating material 3 to connect the mouthpiece 2 and rod 3.
- the tipping paper can extend only partially over the rod of aerosol-generating material.
- the tipping paper 15 extends 5 mm over the rod of aerosol- generating material 3 but it can alternatively extend between 3 mm and 10 mm over the rod 3, or more preferably between 4 mm and 6 mm, to provide a secure attachment between the mouthpiece 2 and rod 3.
- the tipping paper can have a basis weight greater than 20 gsm, for instance greater than 25 gsm, or preferably greater than 30 gsm, for example 37 gsm. These ranges of basis weights have been found to result in tipping papers having acceptable tensile strength while being flexible enough to wrap around the article 1 and adhere to itself along a longitudinal lap seam on the paper.
- the outer circumference of the tipping paper 15, once wrapped around the mouthpiece 2, is about 23 mm.
- the article has a ventilation level of about 10% of the aerosol drawn through the article. In alternative embodiments, the article can have a ventilation level of between 1% and 20% of aerosol drawn through the article, for instance between 1% and 12%.
- Ventilation at these levels helps to increase the consistency of the aerosol inhaled by the user at the mouth end 2”, while assisting the aerosol cooling process.
- the ventilation is provided directly into the mouthpiece 2 of the article 1.
- the ventilation is provided into the cooling section 10, which has been found to be particularly beneficial in assisting with the aerosol generation process.
- the ventilation is provided via perforations 16, in the present case formed as a single row of laser perforations, positioned 13 mm from the downstream, mouth-end 2” of the mouthpiece 2.
- two or more rows of ventilation perforations maybe provided. These perforations pass though the tipping paper 15, second plug wrap 14 and cooling section 10.
- the ventilation can be provided into the mouthpiece at other locations, for instance into the body of material 11 or first tubular element 12.
- the article is configured such that the perforations are provided about 28mm or less from the upstream end of the article 1, preferably between 20mm and 28mm from the upstream end of the article 1.
- the apertures are provided about 25mm from the upstream end of the article.
- the article 1 is suitable for use with a non-combustible aerosol provision device.
- Figure 8 shows an example of a non-combustible aerosol provision device 17 for use with the articles described herein having a proximal end 17a and a distal end 17b.
- the device 17 maybe used to cause an article comprising a susceptor and aerosol generating material, for instance the article 1 described herein, to generate an aerosol which is inhaled by a user of the device 17.
- the device 17 and the article 1 together form a system.
- the device 17 comprises a magnetic field generator comprising a coil 18 configured to generate varying magnetic field.
- the varying magnetic field causes a susceptor in the article 1 to generate heat which, in turn, heats the generating aerosol to form an aerosol
- the device 17 comprises a housing 17a which surrounds and houses various components of the device 17.
- the device 17 has an opening 19 in one end, through which the article 1 may be inserted. In use, the article 1 may be fully or partially inserted into the heating assembly.
- the device 17 may also include a user-operable control element 20, such as a button or switch, which operates the device 17 when pressed. For example, a user may turn on the device 17 by operating the switch 20.
- the device 17 may also comprise an electrical component, such as a socket/port 21, which can receive a cable to charge a power source 22 of the device 17.
- the socket 21 may be a charging port, such as a USB charging port.
- a user inserts an article 1 into the opening 19, operates the user control 20 to begin heating the aerosol generating material and draws on the aerosol generated in the device. This causes the aerosol to flow through the device 17 along a flow path towards the proximal end 17’ of the device 17.
- the other end of the device furthest away from the opening 19 may be known as the distal end 17” of the device 17 because, in use, it is the end furthest away from the mouth of the user.
- the power source 22 may be, for example, a battery, such as a rechargeable battery or a non-rechargeable battery.
- suitable batteries include, for example, a lithium battery (such as a lithium-ion battery), a nickel battery (such as a nickel-cadmium battery), and an alkaline battery.
- the battery is electrically coupled to the magnetic field generator to supply electrical power when required and under control of a controller (not shown) to heat the aerosol generating material.
- the device further comprises at least one electronics module 23.
- the electronics module 23 may comprise, for example, a printed circuit board (PCB).
- the PCB 23 may support at least one controller, such as a processor, and memory.
- the PCB 23 may also comprise one or more electrical tracks to electrically connect together various electronic components of the device 17.
- battery terminals (not shown) may be electrically connected to the PCB 23 so that power can be distributed throughout the device 17.
- the socket 21 may also be electrically coupled to the battery via the electrical tracks.
- the device 17 includes a magnetic field generator comprising a coil 18 that is configured to inductively heat a susceptor in the article 1.
- the coil 18 is an inductor coil.
- the inductor coil is made from an electrically conducting material.
- the inductor coil is made from Litz wire/cable which is wound in a helical fashion to provide a helical inductor coil.
- Litz wire comprises a plurality of individual wires which are individually insulated and are twisted together to form a single wire. Litz wires are designed to reduce the skin effect losses in a conductor.
- the inductor coil is made copper and the Litz wire has a rectangular cross section. In other examples the Litz wire can have other shape cross sections, such as circular.
- the inductor coil 18 is configured to generate a first varying magnetic field for heating a susceptor an article.
- the inductor coil 18 can be connected to the PCB 23.
- the device comprises inductor coil support tube 24.
- the coil support tube 24 is defined by an outer surface an inner surface.
- the outer surface of the coil support tube supports the inductor coil of the magnetic field generator 18.
- the inner surface defines a cavity into which the article 1 can be inserted.
- Tube 24 is preferably made from a material that is not heatable by penetration with a varying magnetic field. This is to avoid the inductor heating the tube during use and also to reduce power consumption.
- the device 17b comprises two magnetic field generators comprises a first inductor coil 18a and a second inductor coil 18b.
- the first inductor coil 18a is configured to generate a first varying magnetic field for heating a susceptor in the article 1 and the second inductor coil 18b is configured to generate a second varying magnetic field for heating a second susceptor.
- the first inductor coil 18a is adjacent to the second inductor coil 18b in a direction along the longitudinal axis of the device 17b (that is, the first and second inductor coils 18a, 18b to not overlap).
- the first and second inductor coils 18a, 18b can be connected to a PCB.
- the first and second coils are supported by the coil support tube 24’.
- the first and second inductor coils 18a, 18b may have at least one characteristic different from each other.
- the first inductor coil 18a may have at least one characteristic different from the second inductor coil 18b.
- the first inductor coil 18a may have a different value of inductance than the second inductor coil 18b.
- the first and second inductor coils 18a, 18b can be of different lengths.
- the first inductor coil 18a may comprise a different number of turns than the second inductor coil 18b (assuming that the spacing between individual turns is substantially the same).
- the first inductor coil 18a may be made from a different material to the second inductor coil 18b.
- the first and second inductor coils 18a, 18b maybe substantially identical.
- the first inductor coil 18a and the second inductor coil 18b are wound in opposite directions. This can be useful when the inductor coils are active at different times. For example, initially, the first inductor coil 18a may be operating to heat a first section/portion of an article, and at a later time, the second inductor coil 18b may be operating to heat a second section/portion of an article. Winding the coils in opposite directions helps reduce the current induced in the inactive coil when used in conjunction with a particular type of control circuit. In Figure 9, the first inductor coil 18a is a right-hand helix and the second inductor coil 18b is a left-hand helix.
- the inductor coils 18a, 18b may be wound in the same direction, or the first inductor coil 18a may be a left-hand helix and the second inductor coil 18b may be a right-hand helix.
- the article 1 described herein can be inserted into a non-combustible aerosol provision device such as the device 17 and 17b described with reference to Figures 10 and 11. At least a portion of a mouthpiece 2 of the article 1 protrudes from the non combustible aerosol provision device 17, 17b and can be placed into a user’s mouth.
- An aerosol is produced by heating the aerosol generating section 3 comprising an aerosol generating composition comprising aerosol-generating material and a susceptor at least partially embedded in the aerosol-generating material using the device 17, 17b.
- the aerosol produced by the aerosol generating material passes through the mouthpiece 2 to the user’s mouth.
- the magnetic field generator comprises a single coil 18.
- the magnetic field generator is configured to inductively heat the susceptor in the aerosol generating section 3 by generation of a varying magnetic field.
- the outer surface of the article 1 may be dimensioned so that the outer surface of the article 1 abuts the inner surface of the coil support tube 24. This ensures that the heating is most efficient because the aerosol-generating section is closer to the coil 17.
- Figure 11 shows an article 1 as described herein received within the coil support tube 24’ of the device 17b.
- the magnetic field generator comprises two coils 18a and 18b. This enables different portions of the aerosol-generating section 3 to be heated at different times and/or to different temperatures.
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB2108831.5A GB202108831D0 (en) | 2021-06-18 | 2021-06-18 | Aerosol-generating composition |
PCT/GB2022/051546 WO2022263851A1 (en) | 2021-06-18 | 2022-06-17 | Aerosol-generating composition |
Publications (1)
Publication Number | Publication Date |
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EP4355123A1 true EP4355123A1 (de) | 2024-04-24 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP22740450.6A Pending EP4355123A1 (de) | 2021-06-18 | 2022-06-17 | Aerosolerzeugende zusammensetzung |
Country Status (8)
Country | Link |
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US (1) | US20240277031A1 (de) |
EP (1) | EP4355123A1 (de) |
JP (1) | JP2024523257A (de) |
KR (1) | KR20240015717A (de) |
CN (1) | CN117500389A (de) |
BR (1) | BR112023026198A2 (de) |
GB (1) | GB202108831D0 (de) |
WO (1) | WO2022263851A1 (de) |
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CA3112933A1 (en) | 2018-09-18 | 2020-03-26 | Airgraft Inc. | Methods and systems for vaporizer security and traceability management |
US12063981B2 (en) | 2019-08-13 | 2024-08-20 | Airgraft Inc. | Methods and systems for heating carrier material using a vaporizer |
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TWI664918B (zh) * | 2014-05-21 | 2019-07-11 | 瑞士商菲利浦莫里斯製品股份有限公司 | 可感應加熱的菸草產品 |
US11191298B2 (en) * | 2018-06-22 | 2021-12-07 | Rai Strategic Holdings, Inc. | Aerosol source member having combined susceptor and aerosol precursor material |
GB201812499D0 (en) * | 2018-07-31 | 2018-09-12 | Nicoventures Holdings Ltd | Method of making aerosol-forming substrate |
-
2021
- 2021-06-18 GB GBGB2108831.5A patent/GB202108831D0/en not_active Ceased
-
2022
- 2022-06-17 JP JP2023576143A patent/JP2024523257A/ja active Pending
- 2022-06-17 KR KR1020247000186A patent/KR20240015717A/ko unknown
- 2022-06-17 EP EP22740450.6A patent/EP4355123A1/de active Pending
- 2022-06-17 CN CN202280043138.2A patent/CN117500389A/zh active Pending
- 2022-06-17 US US18/571,324 patent/US20240277031A1/en active Pending
- 2022-06-17 WO PCT/GB2022/051546 patent/WO2022263851A1/en active Application Filing
- 2022-06-17 BR BR112023026198A patent/BR112023026198A2/pt unknown
Also Published As
Publication number | Publication date |
---|---|
CN117500389A (zh) | 2024-02-02 |
WO2022263851A1 (en) | 2022-12-22 |
KR20240015717A (ko) | 2024-02-05 |
BR112023026198A2 (pt) | 2024-03-05 |
GB202108831D0 (en) | 2021-08-04 |
US20240277031A1 (en) | 2024-08-22 |
JP2024523257A (ja) | 2024-06-28 |
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