WO2016184978A1 - Matériau générateur d'aérosol et dispositifs le comprenant - Google Patents

Matériau générateur d'aérosol et dispositifs le comprenant Download PDF

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Publication number
WO2016184978A1
WO2016184978A1 PCT/EP2016/061314 EP2016061314W WO2016184978A1 WO 2016184978 A1 WO2016184978 A1 WO 2016184978A1 EP 2016061314 W EP2016061314 W EP 2016061314W WO 2016184978 A1 WO2016184978 A1 WO 2016184978A1
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WO
WIPO (PCT)
Prior art keywords
aerosol generating
wires
generating material
aerosol
tobacco
Prior art date
Application number
PCT/EP2016/061314
Other languages
English (en)
Inventor
Walid Abi Aoun
Bryan ALLBUTT
Edward Dennis John
Original Assignee
British American Tobacco (Investments) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British American Tobacco (Investments) Limited filed Critical British American Tobacco (Investments) Limited
Publication of WO2016184978A1 publication Critical patent/WO2016184978A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • the present invention relates to aerosol generating material which emits an aerosol and/ or gas on heating.
  • Tobacco material is heated in smoki ng articles for the purpose of releasing substances contained in the material and deliveri ng these as an aerosol .
  • combustion of tobacco material releases thermal energy which in turn releases a smoke aerosol from the tobacco material .
  • Combustion causes various physico-chemical degradation processes, which may be a combination of oxidative degradation, pyrolysis, pyrosynthesis, and distillation.
  • the thermal energy generated by combustion tends to be high, however, and the amount of heat released is often difficult to control .
  • the heat providing the thermal energy needed to release an aerosol is provided by electrical heati ng.
  • H eat not burn devices also known as tobacco heating devices or tobacco heating products
  • tobacco heating devices are non-combustion type smoki ng articles, developed as an alternative to conventional , combustible cigarettes.
  • These devices volatilise components of tobacco by heating the tobacco material , suitably by electrical heating (although other means of heating could be used) ; pyrolysis or combustion of the tobacco or volati les is avoided.
  • the volati lised components condense to form an inhal able aerosol .
  • a component for aerosol generation by electrical heati ng comprising ng a solid aerosol generati ng material and a plurality of resistive wires, each of which is at least partially embedded i n the solid aerosol generati ng material .
  • a device for generating an inhal able aerosol and/ or gas comprisi ng a component for aerosol generation by electrical heating, thecomponent comprising a solid aerosol generating material and a plurality of resistive wires, each of which is at least partially embedded in the solid aerosol generating material.
  • a device for generating an inhal able aerosol and/ or gas the device comprising a component for aerosol generation accordingto the first aspect.
  • the aerosol generating material is heated by direct contact with the resistive wires.
  • one or more of the wires may be heated to generate at least one delivery of an inhal able aerosol and/ or gas.
  • Each wire can be heated individually to heat a certain portion of the aerosol generating material.
  • one or more of the wires may be heated to generate multiple deliveries of an inhal able aerosol and/ or gas.
  • the wires are separate resistive wires.
  • Separatate it ismeant that the wires geneally do not interconnect within thecomponent for aerosol generation, and in particular, do not form amesh. In some embodiments, some incidental contact between separate wires is not excluded.
  • the aerosol generating material may be repeatedly heated by the wires to generate multiple deliveries of inhal able aerosol and/ or gas.
  • the aerosol generating material comprises an aerosol generating agent.
  • the aerosol generating material comprises nicotine.
  • the aerosol generating material comprises tobacco material, suitably tobacco extract.
  • the aerosol generating material comprises a filler material. In some embodiments, the aerosol generating material comprises a binder. In some embodiments, the wires are at least partially embedded or arefully embedded in the solid aerosol generating material. In some embodiments, the wires are at least partly coated by or are coated by thesolid aerosol generating material. In some embodiments, the majority of or substantially all of the wires are embedded in or coated by thesolid aerosol generating material. In some embodiments, all of thewires are embedded in or coated by thesolid aerosol generating material except for a portion of wire necessary to allow electrical contact with a power source.
  • a first portion of the aerosol generating material may be heated independently from a second portion of the aerosol generating material.
  • the device is configured such that it ispossibleto heat thewires independently of each other. That is, current may be selectively passed through one or morewiressuch that only those wires heat up, thereby allowing controlled heating of one or moreportionsof the aerosol generating material.
  • it ispossibleto individually address particular wires so that, of the plurality of resistive wires, only theaddressed wires heat up.
  • the device is configured such that different potential differences can be applied across individual wires (or selected groups of wires) within the plurality of wires; thus, the temperature response of the individual wires (or the selected group of wires) can be selectively controlled and can differ from other wires. In some embodiments, this meansthat the temperature response of individual wires (or the selected group of wires) within the plurality of wires can be controlled such that they heat up at different rates and/ or to different temperatures.
  • the heating response of one or morewireson application of a current may differ from one or more of the other wires, thereby allowing controlled heating of the aerosol generating material.
  • the heating response of the wires is affected by thewirecross section, thewirelength and the wire material composition.
  • thewires may differ from one another in the material used and/ or in their length and/ or in the wire cross section.
  • the wire cross section may be circular, oval, rectangular or square and may differ between different wires within the pi ural ity of wires.
  • thewires may all have a substantially similar cross section shape, but the size of the cross section may differ between different wires within the plurality of wires.
  • the wires all have a substantially circular cross section, but thewire diameter may differ between different wires within the plurality of wires.
  • Thewires may comprise any suitable electrically conducting medium, i.e. so that a current can be applied across the wires.
  • thewires may comprise a conducting ceramic material.
  • the wires comprise a metal or metal alloy; these are excellent conductors of electricity and thermal energy.
  • Suitable metals include but are not limited to: copper, aluminium, platinum, tungsten, gold, silver, and titanium.
  • Suitable metal alloys include but are not limited to: nichrome and stain I ess st eel.
  • different wires within the plurality of wires have different material compositions.
  • different wires comprise different metals or metal alloys.
  • the wires comprise, substantially consist of or consist of nichrome.
  • Thewires may be substantially linear.
  • the wires may be substantially parallel to each other.
  • the wires may be substantially parallel to an axis of the component for aerosol generation by electrical heating.
  • Thecomponent for aerosol generation by electrical heating may be in the form of a sheet.
  • the sheet may be flat or substantially flat when incorporated into the devices of the present invention.
  • the sheet may be rolled so that it forms a wound/ rolled configuration.
  • theend profile may resemble a spiral shape and the overall shape is approximately cylindrical.
  • the plurality of wires may be disposed substantially parallel to the axis around which the sheet is roiled.
  • the sheet may be formed as a substantially planar sheet, which may then be rolled into thewound configuration.
  • the plurality of wires may at least partially surround the aerosol generating material and beat least partially embedded in the surface of the aerosol generating material.
  • Thewires may be spaced at regular intervals around the aerosol generating material surface.
  • aerosol generating material may be in a monolithicform.
  • the monolithicform may have been formed by an extrusion process.
  • the aerosol generating material may be extruded into a rod, cylinder or tube.
  • the rod or tube may have any suitable cross section (such as circular, elliptical, square and rectangular).
  • the wires may be embedded in a surface of the rod, cylinder or tube and extend parallel to the axis of the rod, cylinder or tube.
  • different portions of the aerosol generating material may have different chemical compositions.
  • the wires may be configured such that it ispossibleto heat the different portions independently during use.
  • actuating means are provided which allow theuser of the device to initiateor control heating of the aerosol generating material by the at least partly embedded wires.
  • the device is a heat not burn or tobacco heating device, or tobacco heating product.
  • a device of thistype is a non-combustion type smoking article, developed as an alternative to conventional, combustibleci gar ettes. These devices vol ati I ise components of tobacco by heating the tobacco material; pyrolysisor combustion of thetobacco or volatiles is avoided. The volatilised components condense to form an inhal able aerosol. The aerosol often comprises water, a humect ant, nicotine and optionally other tobacco components such as flavours and aromas.
  • the device is one in which tobacco is heated to volatilise components without pyrolysisor combustion of thetobacco.
  • a method for fabricating a component for aerosol generation of thefirst aspect (which may be incorporated into a device for generating an inhal able aerosol and/ or gas according to the second aspect), wherein the method comprises applying a slurry of aerosol generating material to a plurality of resistive wires.
  • theslurry isapplied by casting the slurry onto the piuraiity of wires. In some embodiments, theslurry isapplied by spraying the slurry onto the plurality of wires. In some embodiments, theslurry isapplied by dipping the plurality of wiresinto theslurry. In some embodiments, theslurry is extruded with or onto the plurality of wires.
  • the component for aerosol generation by electrical heating fabricated according to the second aspect of thepresent invention, isin the form of a sheet.
  • the method also includes a step of rolling the sheet into a wound configuration.
  • a device according to the second aspect for the generation of an aerosol and/ or gas comprising nicotine.
  • a component for aerosol generation by electrical heating comprising a solid aerosol generating material and a plurality of resistive wires, each of which is at least partially embedded in the solid aerosol generating material.
  • different portionsof thecomponent may be heated
  • Figure 1 shows a schematic perspective view of a first embodiment of the invention.
  • Figure 2 shows a schematic perspective view of a second embodiment of theinvention.
  • Figure 3 shows a schematic perspective view of a test rig apparatus used to evaluate aerosol generation.
  • Figure 4 is a graph of surface temperature against timefor a sample component made accordingto Example 2. The data were collected asset out in Example 4.
  • Figure 5 is a graph of surface temperature against timefor a sample component made accordingto Example 3. The data were collected asset out in Example4.
  • Figure 6 shows a schematic perspective view of athird embodiment of theinvention. Detailed Description
  • the present invention relates to devices for forming an inhal able aerosol and/ or gas, thedevices comprising aerosol generating material that may be heated to emit an inhal able aerosol.
  • thepresent invention provides a device for generating an inhal able aerosol and/ or gas, the device comprising a component for aerosol generation by electrical heating, thecomponent comprising a solid aerosol generating material and a plurality of resistive wires, each of which is at least partially embedded in the solid aerosol generating material.
  • the resistive wires conduct an applied current in use. Electrical resistance in the wires transduces electrical energy into thermal energy which heats the aerosol generating material.
  • thepresent invention provides a device for generating an inhal able aerosol and/ or gas, the device comprising an integrated electrically resistive heating element, wherein the heating element comprises a plurality of wires.
  • the aerosol generating material and plurality of wires form asingleunit or unitary structure.
  • the aerosol generating material and the wires are provided as a single piece or item.
  • at least two resistive wires are at least partially embedded in the same body of aerosol generating material.
  • the aerosol generating material in the unitary structure may, for example, be extruded, cast or molded.
  • the structure or coating may be formed from a slurry which isdried to provide the aerosol generating material in a solid form. In some embodiments, the slurry isdried in contact with theresi stive wires so that the aerosol generating material isin a solid form and adheres to the wires.
  • thewiresareat least partially coated by the aerosol generating material. In some embodiments, the wires at least partially surround the aerosol generating material.
  • the heating of the aerosol generating material does not result in any significant combustion of the material. In some embodiments, the heating results in no combustion or essentially no combustion of the aerosol generating material. In some embodi ments, the device is a heat not burn or tobacco heating device, or a tobacco heating product.
  • Usi ng electricity to heat aerosol generati ng material i n a smoki ng article has many advantages. I n particular, it has many advantages over using combustion.
  • Combustion is a complex process that generates aerosols by a combination of interactive physico-chemical processes which may i nclude oxidative degradation, pyrolysis, pyrosyn thesis, and distillation. I t generally leads to the generation of complex aerosols.
  • smoke arising from a combustible smoki ng article comprisi ng tobacco is a complex, dynamic mixture of more than 5000 identified constituents.
  • the exothermic processes of combustion may be self-sustai ning, and may result in heat generation rates, and heat output quantities, sufficient for degradation of the combustible matrix.
  • the matrix may be completely degraded to an ash residue which may comprise inorganic, non-combustible materials.
  • Very high temperatures can be reached in burni ng cigarettes due to the exothermic reaction of combustion. I n between taking puffs of a cigarette (the inter-puff smouldering period), the centre of the burni ng zone in the tobacco rod of the cigarette can reach
  • the periphery of the burning zone in the tobacco rod of the cigarette can reach temperatures as high as 910°C.
  • Usi ng electrical resistance heati ng systems (such as the resistive wires of the present invention) is advantageous because the rate of heat generation is easier to control , and lower levels of heat are easier to generate, compared with using combustion for heat generation.
  • electrical heati ng systems therefore allows greater control over the generation of an aerosol and/ or gas from aerosol generating materials. Furthermore, it allows for aerosol and/ or gas to be generated without combustion taki ng place, rather than through combustive degradation. Electrical heati ng systems can also fad litate the generation of an aerosol and/ or gas from inherently non-combustible materials, such as inorganic sorbents with i ngredients that generate an aerosol and/ or gas when heated.
  • the resistive wires provide a medium for conducting electricity and generating heat. When an electric current passes through thewires, the temperature of the wires increases, and the aerosol generating material in contact with those wiresisheated.
  • the effect delivered by the aerosol generating material when heated by the wires will depend on thechemical composition of the aerosol generating material, as well as the temperature to which it is heated.
  • the aerosol generating material included in the devices of the invention may have any suitable chemical composition.
  • the devices of the invention areableto provide multiple deliveries or doses of aerosol and/ or gas.
  • the aerosol generating material may be heated to produce sufficient aerosol and/ or gas to allow multiplepuffs. This may be achieved by heating the aerosol generating material for a period of time sufficient to produce a volume of aerosol and/ or gas suitable for multipledeliveries. In some embodiments, thismay involve heating the aerosol generating material constantly. Alternatively, this may involve successive, shorter periods of heating the aerosol generating material, optionally with each period producing a single delivery or dose of aerosol and/ or gas. In the latter embodiments, the same aerosol generating material may be repeatedly heated by the same resistive wires to produce multiple deliveries or doses of aerosol and/ or gas. Alternatively, selected resistive wires can be heated sequentially so that heating each wire provides sufficient aerosol for a single puff.
  • thedevices of theinvention may, in addition to thecomponent for aerosol generation, comprise further aerosol generating materials.
  • the aerosol generating material may comprise an aerosol generating agent.
  • an "aerosol generating agent” isan agent that promotes the generation of an aerosol.
  • An aerosol generating agent may promotethe generation of an aerosol by promoting an initial vapourisation and/ or the condensation of a gas to an inhal able solid and/ or liquid aerosol.
  • an aerosol generating agent may improvethedelivery of flavour from the aerosol generating material. Any suitable aerosol generating agent or agents may be included in the aerosol generating material of the invention.
  • Suitable aerosol generating agents include, but are not limited to: apolyol 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 asdiacetin, triacetin, triethylene glycol diacetate, triethyl citrate or myri states including ethyl myri state and isopropyl myristateand aliphaticcarboxylicacid esters such as methyl st ear ate, dimethyl dodecanedioateand dimethyl tetradecanedioate.
  • apolyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol
  • a non-polyol such as monohydric alcohols, high boiling point hydrocarbons, acids
  • the aerosol generating material may comprise between about 5- 50%, about 8-20% or about 10- 15% aerosol generating agent by weight.
  • the aerosol generating agent may be glycerol.
  • the aerosol generating material may comprise one or more compounds for the purpose of lowering the boiling point of one or more other substances in the aerosol generating material. In some of these embodiments, the aerosol generating material may comprise one or more compounds for the purpose of forming an azeotrope with one or more other substances in the aerosol generating material.
  • the aerosol generating material may comprise one or more flavou rants.
  • the terms “flavour” and “flavourant” refer to materials which, where local regulations permit, may be used to create a desired taste or aroma in a product for adult consumers.
  • flavour and “flavourant” may include extracts (e.g., licorice, hydrangea, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, menthol, Japanese mint, aniseed, cinnamon, herb, wintergreen, cherry, berry, peach, apple, Drambuie, bourbon, scotch, whiskey, spearmint, peppermint, lavender, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, piment, ginger, anise, coriander, coffee, or amint oil from any species of thegenus Mentha), flavour enhancers, bitterness receptor site blockers, sensorial receptor site activators or stimulators, sugars and/ or sugar substitutes (e.g.
  • the aerosol generating material may comprise one or more colourants.
  • the aerosol generating material may be coloured, as required.
  • the aerosol generating material may be coloured such that it resembles components of a conventional, combustible cigarette.
  • a caramel colourant may be included in the aerosol generating material.
  • the aerosol generating material may comprise nicotine. In some embodiments, the aerosol generating material may comprise more than about 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1% nicotine by weight. In some embodiments, the material may comprise less than about 25%, 20%, 15%, 10%, 5%, 2%, 1.5%, or 1% nicotine by weight. In some embodiments, the material may comprise about 0.1-25%, 0.3- 10% or 0.5-1.5% nicotine by weight. In some
  • the material may comprise about 1% nicotine by weight.
  • the aerosol generating material may comprise tobacco material, wherein tobacco material isany material comprising tobacco or derivatives thereof.
  • the tobacco material may comprise one or more of ground tobacco, tobacco fibre, cut tobacco, extruded tobacco, tobacco stem, reconstituted tobacco and/ or tobacco extract.
  • the aerosol generating material may comprise a tobacco substitute.
  • Thetobacco used in the aerosol generating material or treated to produce tobacco material, such as a tobacco extract, for usein the aerosol generating material may be any suitable tobacco, such as single grades or blends, cut rag or whole leaf, including Virginia and/ or Burley and/ or Oriental. It may also be tobacco particle 'fines ' or dust, expanded tobacco, stems, expanded stems, and other processed stem materials, such as cut rolled stems.
  • Thetobacco material used in the aerosol generating material may be a ground tobacco or a reconstituted tobacco material.
  • the reconstituted tobacco material may comprise tobacco fibres, and may be formed by casting, a Fourdrinier-based paper making-type approach with back addition of tobacco extract, or by extrusion.
  • the tobacco material may have any suitable chemical composition and may have been prepared according to any suitable process.
  • the tobacco material may comprise one or more substances in the solid and/ or liquid phase.
  • the tobacco material may have any suitable solid and liquid content.
  • the tobacco material may comprise more than about 0.1%, 0.5%, 1%, 1.5%, 2%, 3%, 4%, 5%, or 10% nicoti ne by weight.
  • the tobacco material may comprise less than about 25%, 20%, 15%, 10%, 7%, 5%, or 4% nicotine by weight.
  • the material may comprise about 0.1-25%, 1- 15% or 2-7% nicoti ne by weight.
  • the tobacco material may comprise a tobacco extract.
  • a tobacco extract is a composition of tobacco that is obtai ned by a method comprisi ng the treatment of tobacco with a solvent, along with any other suitable extraction processes.
  • the aerosol generati ng material may comprise between about 1- 90%, 1-50%, about 2-35%, about 5-35%, about 5-20%, about 5-15%, about 10- 15% or about 5-10% of tobacco extract by weight.
  • the tobacco extract may be obtained by a method comprisi ng the treatment of tobacco with water.
  • the treatment of tobacco with water may comprise addi ng water to tobacco, separati ng the resulting water-based liquid extract from the insoluble portion of tobacco feedstock, and optionally removi ng excess water to form a tobacco extract.
  • Any suitable fi Itration methods may be used, such as centrifugal soiids fiitration or vacuum fluidised bed filtration.
  • Any suitable evaporative concentration methods may be used, such as vacuum spinni ng disk, vacuum falli ng, or risi ng fi lm evaporation. Techniques including spray-drying or freeze- dryi ng may also be uti lised to reduce/ remove water content. Such processes would be known to those skilled in the art of fi ltration and evaporative concentration.
  • tobacco extract may be obtained by a method comprisi ng extraction usi ng a supercritical fluid, e.g. supercritical carbon dioxide.
  • tobacco extract may be obtai ned by a method comprising extraction with a solvent which may comprise a polyol or other suitable higher boili ng liquids.
  • the extraction solvent may comprise glycerol and/ or propylene glycol (and optionally water).
  • the tobacco extract may be prepared by a method comprising steps for removi ng or reducing the concentration of certain substances.
  • the tobacco extract may be treated with bentonite to reduce protei n content, and/ or polyvinylpolypyrrolidone to reduce polyphenol content.
  • the tobacco extract may be prepared by a method comprising steps for addi ng or i ncreasi ng the concentration of one or more substances.
  • aerosol generating agents and/ or flavourants may be added, for example.
  • a tobacco extract i ncluded in the aerosol generating material i n the devices of the invention may have any suitable chemical composition.
  • I t may have any suitable solid and liquid content.
  • the solid content of the tobacco extract may have a significant effect on the structural stability of the aerosol generati ng material when added to the resistive wires, and may have a significant effect on how the material is affected when heated.
  • the aerosol generati ng material may be prepared by drying a slurry of the aerosol generating material comprisi ng a tobacco extract with a solid content of at least about 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% 50%, 60%, 75%, 80%, 85%, 90% or 95% by weight.
  • the aerosol generati ng material may comprise any suitable substances in place of, or i n addition to, a tobacco extract.
  • suitable substances include, but are not li mited to: water, a bi nder, an inorganic filier material , and an aerosol generati ng agent.
  • components of the aerosol generati ng material wil l be i ncluded in a slurry which is dried to form the component of the present invention.
  • the aerosol generati ng material may comprise tobacco in place of, or in addition to, a tobacco extract.
  • the tobacco may be ground tobacco, with a particle size of 250 pm or less or with a particle size of 80 ⁇ or less. (This means that all particles pass through a si eve of appropriate size.)
  • the aerosol generating material is in the form of a sheet and comprises tobacco, suitably ground tobacco.
  • the aerosol generating material may further comprise a bi nder (suitably an algi nate), an aerosol generating agent (such as glycerol or propylene glycol) and an inorganic carrier (suitably chalk).
  • the aerosol generati ng material may additionally comprise cellulose fibres, suitably woodpulp or tobacco fibres.
  • the aerosol generating material can be formed from a slurry containing tobacco, suitably ground tobacco.
  • the resistive wi res may be at least partially embedded i n a reconstituted tobacco material which is the aerosol generating material .
  • the reconstituted tobacco material may comprise further substances, includi ng one or more of a bi nder (suitably an algi nate), an aerosol generating agent (such as glycerol or propylene glycol) and an inorganic carrier (suitably chalk).
  • a bi nder suitable an algi nate
  • an aerosol generating agent such as glycerol or propylene glycol
  • an inorganic carrier suitable for chalk.
  • Such substances may be added duri ng the process of preparing a reconstituted tobacco material , i .e. by addition to the tobacco fibres, suitably using a slurry, solution or a supercritical fluid contai ning the substances.
  • the reconstituted tobacco material which is the aerosol generati ng material may be formed as a sheet.
  • the reconstituted tobacco may comprise an aerosol generati ng agent (such as glycerol or propylene glycol) and an i norganic carrier (suitably chalk) . Colourants or flavours may also be added.
  • the aerosol generati ng material may include no bi nder.
  • the component for aerosol generation comprising an aerosol generati ng material and a plurality of wires may not include nicotine.
  • an alternative nicotine source may be provided. This may be a solid or liquid nicotine source.
  • the aerosol generati ng material may comprise one or more inorganic fi ller materials.
  • the aerosol generating material may comprise any suitable inorganic fi ller materials.
  • Suitable i norganic filler materials i n clude, but are not li mited to: calci um carbonate (i .e. chalk), perlite, vermiculite, diatomaceous earth, colloidal silica, magnesium oxide, magnesi um sulphate, magnesi um carbonate, and suitable inorganic sorbents, such as molecular sieves. Calci um carbonate is particularly suitable.
  • thefiller comprises an organic material such as wood pulp, cellulose and cellulose derivatives. I norganic f i I ier materials are generally more preferred.
  • a filler material may be included in the aerosol generating material for any suitable purpose. In some embodiments, it may act asasorbent and/ or support for other substances in the aerosol generating material. In some embodiments, it may act as a structure for adsorbing other substances before releasing them on heating. In some embodiments, it may act asasorbent and/ or support for an aerosol generating agent, such as glycerol, and/ or any other substances that influence the sensory characteristics of the aerosol generated on heating.
  • an aerosol generating agent such as glycerol
  • a filler material may be included in the aerosol generating material to provide additional strength. In some embodiments, it may be included together with a tobacco extract, in which case it may be included to help retain the tobacco extract within the aerosol generating material and to provide an aerosol generating material with suitable strength for subsequent processing-' utilisation.
  • a filler material may be included in the aerosol generating material in any suitable quantity and concentration. In some embodiments, it may be advantageous to include a large quantity and concentration of filler material in the aerosol generating material to increase its strength and/ or processability.
  • the aerosol generating material may comprise between about 1-90%, 10-50%, 20-90%, 35-90% 45- 90%, 50-90%, 55-85%, 60-80%, or 65-75% filler material, suitably i norganic fi I Ier material, by weight.
  • the inorganic filler material may be calcium carbonate, suitably chalk.
  • the aerosol generating material may comprise one or more binders.
  • the aerosol generating material may comprise any suitable binder.
  • the binder comprises one or more of an alginate, celluloses or modified celluloses, polysaccharides, starches or modified starches, and natural gums.
  • Suitable binders include, but are not limited to: alginate salts comprising any suitable cation, such as sodium alginate, calcium alginate, and potassium alginate; celluloses or modified celluloses, such as hydroxypropyl cellulose and carboxymethyl cellulose; starches or modified starches; polysaccharides such as pectin salts comprising any suitable cation, such as sodium, potassium, calcium or magnesium pectate; xanthan gum, guar gum, and any other suitable natural gums.
  • alginate salts comprising any suitable cation, such as sodium alginate, calcium alginate, and potassium alginate
  • celluloses or modified celluloses such as hydroxypropyl cellulose and carboxymethyl cellulose
  • starches or modified starches polysaccharides
  • pectin salts comprising any suitable cation, such as sodium, potassium, calcium or magnesium pectate
  • xanthan gum, guar gum and any other suitable natural gums.
  • a binder may be included in the aerosol generating material in any suitable quantity and concentration.
  • the quantity and concentration of thebinder included in the material may vary depending on the composition of the material, the nature of the resistive wires and the properties desired of the device into which it is incorporated.
  • the aerosol generating material may comprise between about 0.5-50%, 3-40%, 5-20%. or 5- 10% binder by weight.
  • thebinder may be sodium alginate.
  • the aerosol generating material may comprise water.
  • Water may be included for any suitable purpose, and may be included having been purified using any suitable method of purification, such as reverse osmosis, distillation, and/ or ion exchange. In some embodiments, it may be included to moisten thematerial.
  • the aerosol generating material may comprise about 1- 25%, 1-15%, 3-15%, 3-10%, 7- 10% or about 3-7% water by weight.
  • the aerosol generating material may be applied to the resistive wires in theform of a slurry which isdried to form a solid coating or layer, or monolithicform.
  • the slurry may include water, some of which is removed as the slurry dries.
  • the aerosol generating material may comprise one or more of thefollowing in any possible combination: an aerosol generating agent, such as glycerol; a filler material, such as chalk; a binder, such as sodium alginate; aflavourant or colourant; atobacco material such as tobacco per se, tobacco extract or nicotine; and water.
  • an aerosol generating agent such as glycerol
  • a filler material such as chalk
  • a binder such as sodium alginate
  • aflavourant or colourant such as tobacco per se, tobacco extract or nicotine
  • atobacco material such as tobacco per se, tobacco extract or nicotine
  • the aerosol generating material may comprise heat-conducting particles. These may improve the rate of heat transfer from the resistive wires to the aerosol generating material. Alternatively or in addition, they may improve the rate of heat transfer from one region of the aerosol generating material to another region of the aerosol generating material.
  • a slurry isaliquid, gel, solution, suspension or emulsion. It does not necessarily include solid particles of matter. It is, in some embodiments, in a form which may be readily applied to the surface of a heat source so that, upon drying, it forms a coating or encases the heat source.
  • theslurry has a consistency and/ or water content that renders it suitablefor casting or dipping or spraying onto the resistive wires.
  • Theslurry may have a water content of about 25-90%, about 40-90%, about 50-90% about 60- 85% or about 70-80% by weight.
  • theslurry may have a consistency and/ or water content that renders it suitablefor extrusion, for example, to form a rod of aerosol generating material around which the heat source may be placed or formed.
  • theslurry in which theslurry is extruded to form the component of the present invention, theslurry may have a water content of less than about 60%, 50%, 40%, 30% Or 25% by weight.
  • additional ingredients may be included in the aerosol generating material for amelioration of sensory char act eristics of the aerosols generated.
  • water, flavourings, casings, or substances which may be acidic or basic in character may alter the taste, flavour, and sensory impact of the aerosol.
  • these additional ingredients may lead to a milder or mellow effect. In some embodiments, they may lead to more pronounced sensory effects.
  • the aerosol generating material may be heated to a temperature sufficient to significantly increase the rate of evaporation and/ or sublimation of a substance in the aerosol generating material, but insufficient to initiatecombustion. This may be the case when thedevicesof theinvention are heat not burn or tobacco heating devices or tobacco heating products. In some other embodiments, the aerosol generating material may be heated to a temperature sufficient to initiatecombustion. This may be the case when the device is a combustible device. In some embodiments, the device may be configured to heat the aerosol generating material to a temperature of between about 50-400°C, 100-350°C, 150-350°C, 150- 330 °C, or 180-300°C.
  • the plurality of wires may comprise 2 or more, 3 or more, 4 or more, 5 or more, or 10 or more wires. In some embodiments, the plurality of wires may comprise fewer than 15, 12 or 10 wires. In some embodiments the plurality of wires comprises 2- 15, 4-12 or 5-10 wires. In some embodiments, the plurality of wires comprises 6, 7, 8 or 9 wires. The plurality of wires may be spaced from each other by lessthan about 2 cm, 1.5cm, 1cm or 0.75cm.
  • the wires may be substantially linear.
  • the wires may be arranged substantially parallel to each other.
  • the wires may consist of aplurality of
  • substantially linear wires which may be arranged substantially parallel to each other.
  • the wires are separate from oneanother.
  • “separate” it is meant that thewiresdo not interconnect within thecomponent for aerosol generation, and in particular, do not form a mesh. In other words, they are individual wires. This means that the plurality of wires are not in electrical contact within thecomponent for aerosol generation. In other words, thereis no electrically conducting path between the separate wires. Thewiresdo not form a mesh within thecomponent for aerosol generation. However, in some embodiments, the wires being separate as defined does not preclude the existence of incidental contact of some of the wires within the component for aerosol generation.
  • One or morefurther electrically resistive heating elements may be included in the devices of the invention. In embodiments wherein one or morefurther heating elements is included, each one may be the same or may be different. Where there is more than one heating element, the second or more heating element isnot particularly limited and may have any suitabieform; it isnot limited to aplurality of wires, and may be a metal mesh, sheet or plate, for example.
  • the heat wires independently of each other. That is, current may be selectively applied to one or more wires such that only those wires heat up, thereby allowing controlled heating of one or moreportionsof the aerosol generating material.
  • it ispossibleto individually address particular wires so that, of the plurality of wires, only the addressed wires heat up.
  • adjacent wires may be heated sequentially.
  • different portionsof the aerosol generating material may have different chemical compositions.
  • the plurality of wires may be configured such that it ispossibleto heat thedifferent portions at different times during use, thereby resulting in different aerosols and/ or gases being generated at different times.
  • different portionsof the aerosol generating material may be able to generate different flavours, and/ or provide different sensory experiences.
  • the user of the device may be able to initiate and/ or control which of the portions is heated, and so which aerosols and/ or gases are generated.
  • a single body of aerosol generating material may be provided, in which different portions have different compositions.
  • more than one body of aerosol generating material may be provided, with discrete bodies of aerosol generating material optionally being separated by insulating means; in such embodiments, at least one of the bodies has embedded in it at least two resistive wires.
  • the plurality of wires may comprise any suitable conducting medium.
  • the wires comprise a metal or metal alloy. It may be advantageous for the wires to comprise a metal or metal alloy because metals are excellent conductors of electricity and thermal energy.
  • Suitable met als include but are not limited to: copper, aluminium, platinum, tungsten, gold, silver, and titanium.
  • Suitable metal alloys include but are not limited to: nichrome and stain I ess st eel. Nichrome been shown to be effective in experiments, as discussed in the Examples section below.
  • the heating response of one or morewireson application of a current may differ from one or more of the other wires, thereby allowing controlled heating of the aerosol generating material.
  • the heating response of the wires is affected by the wire diameter and material composition.
  • the wires may differ from each other; suitably different wires may have different diameters or may be made from different materials.
  • one or more of, or all of, the plurality of wires may comprise nichrome, wherein the alloy composition of the wires may be the same for each wireor may differ between wires.
  • the plurality of wi res substantially consist of or consist of nichrome. I n some
  • each of the plurality of wi res is substantially the same or is the same.
  • Suitable nichrome wire compositions may i nclude from about 50%, 60%, 70%, 80% or 90% nickel by weight and about 10%, 20%, 30%, 40% or 50% chromium by weight. I n some embodi ments, nichrome wi res may be used which (substantially) consist of 80% nickel and 20% chromi um by weight.
  • the metal or metal alloy may be coated i n another material which is more resistant to corrosion than the metal or metal alloy.
  • this material may also be a metal or metal alloy, such as gold or silver.
  • the wires may be advantageous for the wires to have a large surface area to volume ratio in order to promote the dissipation of thermal energy, and the heati ng of the aerosol generati ng material .
  • the diameter of each wi re may be the same or the diameter may differ between wi res.
  • the wire diameter may be less than about 1 mm, 0.5 mm, 0.4 mm , or 0.3 mm.
  • the wires may be advantageous for the wires to have high electrical conductivity; in other embodi ments, it may be advantageous for them to have low electrical conductivity. This is because the electrical conductivity of the wires dictates the electric current generated at any given voltage, which itself dictates two things: the rate at which the element emits heat, and the rate at which it consumes electricity.
  • an electric current may be passed through the wi res with a magnitude of between about 0.3-8 A, 2-6 A, or 4-6 A.
  • the battery may produce a current of greater than about 8 A.
  • thecomponent for aerosol generation may be in theform of a sheet. An example of such a sheet is schematically represented in Figure 1, in which the sheet 1 comprises a plurality of linear wires 2 partly embedded within an aerosol generating material 3. In theembodiment depicted the wires are arranged parallel to oneanother.
  • the sheet may be flat or substantially flat when incorporated into the devices of the present invention.
  • the sheet may be rolled or wrapped so that it formsawound configuration.
  • One such embodiment is shown in Figure 2.
  • theend profile resembles a spiral shape 4 and the overall shape is approximately cylindrical 6.
  • thewires2 may be disposed approximately parallel to the axis around which the sheet is roiied.
  • the sheet 1 may be formed as a substantially planar structure, which may then be rolled into the wound configuration 6.
  • the wound configuration isa particularly convenient way in which to incorporate the component for aerosol generation into a device. This is because the wires are then both (a) in direct contact with the immediately surrounding aerosol generating material and (b) proximal to other layers of the rolled sheet; thus, on heating a sheet in a wound configuration, the wires can each heat a wider area of the aerosol generating material, and so heating is particularly efficient and power consumption is lower.
  • thewires2 protrude from the sheet at each end and contact each other to form a single electrical contact 5 at each end of thecylinder 6.
  • the sheet may comprise a single layer of aerosol generating material and a plurality of substantially linear, substantially parallel wires.
  • the sheet may have alaminate structure comprisi ng two or more layers in which each layer comprises a plurality of substantially linear, substantially parallel wires.
  • thewiresin one layer may be approximately parallel to the wires in another layer.
  • the sheet may comprise portions of aerosol generating material which may be independently heated. One or more of the plurality of wires may pass through a different portion of the aerosol generating material from one or more of the other wires.
  • the sheet may comprise more than one body of solid aerosol generating material, each body optionally being separated by insulating means, and in which each body has an integrated electrically resistive heating element; at least one body comprises a plurality of resistive wi res, which are at least partially embedded i n that body.
  • the wi res may be constantly i n contact with the power source, or they may come i nto contact with the power source only when the device is i n use and the aerosol generating material is to be heated.
  • the aerosol generati ng material comprises two or more portions and the aerosol generati ng material may be moved i n order to facilitate the sequential heati ng of two or more portions of the aerosol generati ng material .
  • the movement may engage one or more resistive wi res associated with any given portion of aerosol generati ng material with a power source.
  • the portions of aerosol generati ng material have the same composition.
  • the portions of aerosol generating material have different compositions.
  • the device may be configured to allow the wound sheet to be unwound by the user.
  • the sheet may be unwound in order to connect a new portion of aerosol generating material to the power source, which portion has not yet been heated.
  • the sheet may be unwound to reveal fresh aerosol generati ng material after the material which has already been exposed has already been heated. This may increase the amount of material which can be heated and so extend the length of time over which the device may be used.
  • the sheet may be wrapped around a spool , which may make it easier to unwi nd the sheet.
  • the spool may have a cyli ndrical shape.
  • a second spool may be provided, parallel to the first.
  • the spent or consumed material may be wound onto the second spool i n use.
  • the two spools and sheet can be combi ned in a "cassette".
  • Either spool may be driven to move the sheet.
  • the wi res suitably extend parallel to the longitudi nal axis of the spools and protrude from the sides of the sheet.
  • the protrudi ng wires sequentially contact electrodes as the spools are driven, which electrodes are connected to a power source.
  • the spools may be driven by hand, or i n some embodi ments, may be driven by a motor. I n some cases, the material may become frangible after heati ng, and so a support material may be provided underneath the exposed portion between the two spools.
  • An example of the "cassette" structure isdepicted in Figure 6, in which a sheet 1, comprising electrically resistive wires 2 embedded in an aerosol generating material 3, is wrapped around two spaced spools 61. Two electrodes 63 are arranged adjacent to the sheet 1 in the gap between the two spools. These electrodes are connected to a power source 62.
  • the resistive wires 2 extend parallel to the spools longitudinal axes and protrude from the edges of the sheet 1 such that, as the spools are rotated, adjacent wires sequentially contact the electrodes 63 and heat up.
  • different wires within the plurality of resistive wires may be independently powered, to allowtheportionsof the aerosol generating material associated with those different wires to be heated independently and/ or sequentially.
  • thedifferent wires are independently powered by virtue of the parts having separate power sources, such as separate batteries.
  • thedifferent wires are independently powered by virtue of one or more switches linking the parts to a single power source.
  • one or more batteries may be used to provide a potential difference and pass a direct electric current through the resistive wires.
  • one or more batteries may be connected to the resistive wires in any suitable way, for example by using of wires and/ or clips.
  • the batteries may be thesameor may bedifferent.
  • a battery used in thedevicesof theinvention may have any suitable properties.
  • it may be rechargeable or non-rechargeable and may be replaceableor non- replaceable.
  • a battery used in thedevices of theinvention may have any suitable voltage.
  • a battery with a high voltage may be preferred over a battery with a low voltage because this will generate a higher electric current and the resistive wires will emit heat at a higher rate.
  • a battery i ncorporated into the devices of theinvention has a voltage of between about 0.5-10 V, 2-8 V, or 4-6 V.
  • the battery may have a higher voltage, e.g.10 V or more may be used.
  • the voltage of a battery used in thedevices may be chosen based on the size of the electric current which needs to passthrough the resistive wires.
  • the resistive wires have high electrical resistance
  • the battery may have a high voltage; in embodiments where the resistive wires have low electrical resistance, the battery may have alow voltage.
  • a battery used in thedevices may have any suitable charge capacity.
  • a battery with a high charge capacity may be preferred over a battery with alow charge capacity because this will allow the battery to deliver a potential difference for a longer period of time.
  • the plurality of wires may at least partially surround the aerosol generating material and beat least partially embedded in the surface of the aerosol generating material.
  • the wires may be spaced at regular intervals around the aerosol generating material surface.
  • aerosol generating material may be in amonolithicform. Themonolithicform may have been formed by an extrusion process.
  • the aerosol generating material may be extruded into a rod, cylinder or tube.
  • the wires may be embedded in a surface of the rod, cylinder or tube and extend parallel to the longitudinal axis of the rod, cylinder or tube.
  • thecomponent comprising aerosol generating material and the resistive wires may be provided in a cartridge, and the cartridge may be inserted into a device.
  • thiscartridge may be replaceable.
  • the cartridge may comprise one or more areas on itssurfacefor connecting the resistive wires of the cartridge to a power source in thedevice. In some embodiments, these areas may be covered by a cover, such as a cap, when thecartridge has not been added to the device. In some embodiments, the cartridge may comprise one or more orifices for the passage of air, gas, and/ or aerosol. In some embodiments, these orifices may be covered by a cover, such as a cap, when the cartridge has not been added to thedevice.
  • thecartridge may be combined with other parts of the aerosol generating device in any suitable way. In some embodiments, it may be attached to other parts of the device by a friction fit and/ or a screw fit and/ or a press fit.
  • the devices may comprise an actuator, wherein the actuator may be actuated to initiatetheheat source by initiating the passing of electricity through at least part of theresi stive wiresto generate heat. In some cases, the actuator may be manually activated in use. In some of these embodiments, the actuator may be, or may be connected to, a switch in an electrical circuit.
  • heating may be initiated when a pressure gradient isproduced within the device. This pressure gradient may, for example, be produced when puffing on or inhaling through the device. In some embodiments, the resistive wires may be heated when puffing or inhaling.
  • the device may comprise an indicator, wherein the indicator indicates one or more properties of the resistive wires and/ or aerosol generating material.
  • the device may comprise an indicator for indicating the temperature of the resi stive wi res and/ or aerosol generating material.
  • the device may comprise an indicator for indicating the extent to which the aerosol generating material has released an aerosol and/ or gas.
  • thedevice may comprise temperature controlling feedback circuitry to regulate the temperature of the resistive wires. This may be used to provide the optimum temperature for aerosol generation by heating.
  • the device may comprise an insulating layer between the outside of the device and the heating element (i.e. the resi stive wires).
  • a method for fabricating the component for aerosol generation by electrical heating which is incorporated into aerosol generating devices of the invention.
  • the method comprises applying a slurry of aerosol generating material to a plurality of wires.
  • this involves casting or coating a slurry of aerosol generating material onto the plurality of wires and/ or dipping the plurality of wires into a slurry of aerosol generating material.
  • this involves extruding a slurry of aerosol generating material onto the plurality of wires.
  • thecomponent for aerosol generation isfabricated in sheet form; that is, it isfabricated as a substantially planar body (i.e. sheet), which may optionally be rolled into awound configuration.
  • any suitable process or processes may be used to prepare the plurality of wires and the slurry of aerosol generating material before combining them.
  • the aerosol generating material isformed from a slurry which isapplied to the plurality of wires and then allowed to dry.
  • the aerosol generating material, and theslurry used to prepare it comprise a tobacco material.
  • the aerosol generating material is prepared by a method comprising the formati on of a slurry.
  • the components of the aerosol generating material may be added in any suitable order.
  • the slurry may undergo mixing during and/ or after the addition of its components and, in these embodiments, may undergo mixingfor any suitable length of time. The length of time over which theslurry undergoes mixing will depend on its composition and volume, and may be varied accordingly.
  • theslurry may undergo mixing as necessary to make the composition of theslurry substantially homogeneous before being combined with the pi ural ity of wires.
  • the method may comprise the steps of (1) addingsodium alginate to the water and hydrating the alginate to form a smooth paste, (2) adding glycerol (and optionally caramel colourant), (3) adding chalk, (4) mixing thoroughly to form a smooth slurry, and optionally (5) adding tobacco extract.
  • themethod will comprise adding at least one of caramel colourant and tobacco extract. In some embodiments, no colourant will be included.
  • a method of making the slurry may comprises
  • the method will comprise adding at least one of caramel colourant and tobacco extract. In some embodiments, no colourant will be included.
  • the slurry of aerosol generating material may be formed by a process comprising adding one or more additives, such asflavourants.
  • thewires may be placed onto a plate before the slurry is poured onto it.
  • thewires may be placed onto the band of abandcasting machine.
  • the slurry may be poured onto the wires so that it is evenly spread over the heat source with any suitable thickness or depth.
  • a casting knife may be used to ensure even thickness.
  • the slurry may be poured onto the wires so that it has a thickness or depth of about 0.5-6 mm, 0.6-5 mm, 0.7-4 mm, 0.8-3 mm, 0.9-2.5 mm or 1-2 mm.
  • the slurry may be poured onto the resistive wires so that it isspread evenly and has a thickness or depth of about 2 mm.
  • the slurry may bedried, and may bedried using any suitable method of drying.
  • the slurry may bedried at room temperature (i.e. about 20-25°C).
  • theslurry may bedried in warm air (i.e. an oven).
  • theslurry may bedried at any suitable temperature for any suitable length of time.
  • theslurry may bedried at a temperature of about 30-100°C, 60-100°C, 40-75°C, 45-60°Cor 45- 55°C.
  • the resulting structure in which the wires are at least partially embedded in the aerosol generating material
  • the structure may be removed using an item for accessingthe space between structure and the plate, such as a knife or blade (a "doctoring knife").
  • the structure may be removed by increasing the temperature of the contact point between the structure and the plate.
  • the structure may be removed from the plate using steam which, in addition to increasing the temperature of the contact point between the structure and the plate, causes sorption of water by the aerosol generating material which aids its removal.
  • the component for aerosol generation may be conditioned after being removed from the plate.
  • thecomponent may be conditioned at about a temperature of about 20-25°C, such as about 22°C.
  • the component may be conditioned in ai r with a relative humidity of about 50-80%, such as about 60%. Commonly, conditioning is carried out at 22°C and a relative humidity of 60% for an appropriate ti me period, e.g. 48 hours.
  • the component may then be stored (e.g. in a sealed contai ner) at a temperature below room temperature (e.g. 4-20°C) and at any suitable humidity for any suitable length of ti me, before being incorporated into the device of the invention.
  • a temperature below room temperature e.g. 4-20°C
  • the resulting structure may be divided into separate pieces. These separate pieces may then be incorporated into one or more devices.
  • the resulti ng structure may be in the form of a sheet or strip and may be cut into separate pieces using any suitable method of cutti ng. I n some cases, these separate pieces are stored in sealed capsules or other suitable sealed packagi ng to prevent or mi ni mise degradation prior to use.
  • Solids and “Solid(s) Content” refer to the whole of the extract or slurry other than the water, and may i nclude components which by themselves are liquid at room
  • WWB Wet Weight Basis
  • DWB Dry Weight Basis
  • Reverse Osmosis [ RO] quality water refers to softened water which is additionally purified by reverse osmosis.
  • Example 1 Tobacco extraction and extract composition
  • the density of the concentrated extract was 1.21 g cm 3 .
  • This tobacco extract was used in the manufacture of an aerosol generating material i n Example 3 (below) .
  • Example 2 Aerosol generati ng material without tobacco extract - manufacturi ng procedure and composition
  • caramel colourant
  • caramel colourant
  • the total water added to ensure complete transfer of ingredients was approxi mately 200g, so the total batch water weighed 70 Og.
  • Chalk 235.5g was fi nally added in a slow powder stream with continuous high shear mixi ng.
  • a series of approximately parallel nichrome wires (35 SWG - see Table 2 below) were strung the length of a stai n I ess steel casti ng plate.
  • the slurry was then cast onto the stain I ess steel plates at 2mm thickness using acasting knife. This provided a constant thickness of theslurry which was then dried. Drying can be effected by air drying at ambient conditionsfor approximately 24 hours or in an oven at ca.90 °Cfor about 30 - 60 minutes.
  • Thedried sheet was then removed from the plate and conditioned by exposure at 22 °Cand 60% relative humidity (RH), for 48 hours. In some cases, the dried sheet was cut off the casti ng plate usi ng a "doctori ng" knife.
  • Example 3 Aerosol generating material with tobacco extract - manufacturing procedure and composition
  • the tobacco extract based aerosol generating material was prepared utilising the following procedure.
  • the tobacco extract in Table 1 was used to prepare this material.
  • a seriesof approximately parallel nichrome wires (35 SWG - see Table 2 above) were strung the length of a stain I ess steel casting plate.
  • the slurry wasthen cast onto the stain I ess steel plates at 2mm thickness using acasting knife. This provided a constant thickness of theslurry which wasthen dried. Drying can be effected by air drying at ambient conditionsfor approximately 24 hours or in an oven at about 45-55 °Cfor 0.5- 5 hours (minimum timeused to reduce loss of volatiles).
  • Thedried sheet was then removed from the plate and conditioned by exposure at 22 °Cand 60% relative humidity (RH), for 48 hours. In some cases, thedried sheet was cut off the casting plate using a "doctoring" knife.
  • WWB Wet Weight Basis (data calculated for material weights including water content);
  • DWB Dry Weight Basis (corrected for water content)
  • the sheets of aerosol generating material manufactured in Examples 2 and 3 were cut into strips measuring 3cm x 5cm. Each strip contained 7 wires, each of which isabout 7cm long and each of which protruded from both sides of the strip by about 2cm.
  • the wire conductors protruded from each side of theroll of aerosol generating material and wereconnected totheterminalsof theaerosol generation test rig.
  • the rolled configuration is depicted in Figure 2, in which the sheet 1, comprising a plurality of wires 2 embedded within theaerosol generating material 3, iswound to form an approximately cylindrical shape 6.
  • Theend profile4 of thecylinder resembles a spiral.
  • the wires 2 protrude from the sheet at each end, and contact one another 5 for subsequently contacting electrodes to allow power delivery. Aerosol generation test rig apparatus and aerosol propensity evaluation
  • the aerosol generation test rig apparatus was used to assess aerosol generation of the aerosol generation materials manufactured in Examples 2 and 3.
  • the apparatus is il lustrated i n Figure 3 and i nciudes a tubuiar glass chamber 10 formed from a glass tube 101 and two glass end caps 102.
  • Two tungsten electrodes 11 extend through the chamber wall from the outside to the i nside of the ch amber.
  • a rolled sample 6 prepared as set out in the preceding section is connected to the electrodes i nside the chamber.
  • An electrical power supply 12 (Weir Model 413D) is connected to the electrodes outside of the chamber.
  • An upstream air inlet 103 is provided in the upstream end cap 102.
  • a downstream outlet 104 in the downstream end cap 102 is connected to a f i Iter chamber 13, i n which a Cambridge particle fi lter 131 is provided.
  • thermocouple 16 H ANNA H I 93532 K is arranged to measure the surface temperature of the sample 6.
  • the sample 6 being tested was connected to the electrodes 11 inside the chamber 10.
  • the ai r flow rate was set at 1.95 l/ min with air flowing F from the upstream air inlet 103 to the conti nuous draw pump 15.
  • the pump 15 and power supply 12 were switched on.
  • the temperature was noted at approxi mately one minute intervals from the thermocouple 16 reading, and aerosol formation was noted via observation of opacity within the equipment.
  • the power supply 12 was switched off after 15 mi nutes, and the equipment allowed to cool for 4 minutes. After a total run time of 19 minutes, the pump 15 was switched off. Particulate aerosol was trapped on the Cambridge fi lter 131 and volatiles passing through the fi lter were trapped in the iiquid trap 14.
  • the interior surfaces of the glass chamber 10 and fi lter chamber 13 were wiped clean using further, unused portions of Cambridge particle fi lter pad.
  • the Cambridge fi lter pads both those used to wipe clean the apparatus and that used as the trap for particulate aerosol
  • the contents of the liquid gas trap were added to a flask, which was placed on a shaker for 20min then analyzed by gas chromatography to determi ne the aerosol nicotine and glycerol content.
  • the weight of the aerosol generating material was measured and the available quantity of glycerol and nicotine for aerosol formation calculated. Efficiency of transfer of these components to the aerosol could then be calculated.
  • i n dicates the percentage transfer of nicoti ne and glycerol from the aerosol generati ng material to the aerosol following the application of electrical power.
  • inventions of theinvention may suitably comprise, consist of, or consist essentially of, appropriate combinations of the disclosed elements, components, features, parts, steps, means, etc., other than those specifically described herein.
  • this disclosure may include other inventions not presently daimed, but which may be claimed in future.

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  • Manufacture Of Tobacco Products (AREA)

Abstract

L'invention concerne un constituant (1) générateur d'aérosol par chauffage électrique, le constituant (1) comprenant un matériau solide de génération d'aérosol (3) et une pluralité de fils résistifs (2), dont chacun est au moins partiellement noyé dans le matériau solide de génération d'aérosol (3) .
PCT/EP2016/061314 2015-05-20 2016-05-19 Matériau générateur d'aérosol et dispositifs le comprenant WO2016184978A1 (fr)

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GBGB1508670.5A GB201508670D0 (en) 2015-05-20 2015-05-20 Aerosol generating material and devices including the same

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WO2019215039A1 (fr) * 2018-05-10 2019-11-14 Jt International Sa Cartouche consommable pour un dispositif de génération d'aérosol
WO2020025714A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Substrat de génération d'aérosol
WO2020025726A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Procédé de fabrication d'un substrat de formation d'aérosol
WO2020025732A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Génération d'aérosol
WO2020025733A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Génération d'aérosol
WO2020025701A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Substrat de génération d'aérosol
WO2020028468A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Substrat de génération d'aérosol
WO2020025727A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Substrat de génération d'aérosol
WO2020025734A1 (fr) * 2018-07-31 2020-02-06 Nicoventures Trading Limited Substrat de génération d'aérosol
WO2020150034A1 (fr) * 2019-01-18 2020-07-23 Altria Client Services Llc Système aérosol non combustible et logement de formulation pré-aérosol
CN111838739A (zh) * 2019-04-30 2020-10-30 贵州中烟工业有限责任公司 一种加热不燃烧发烟体的制造方法
CN111869937A (zh) * 2017-10-30 2020-11-03 韩国烟草人参公社 气溶胶生成装置和用于气溶胶生成装置的加热器
WO2021084039A1 (fr) * 2019-10-29 2021-05-06 Jt International Sa Consommable pour un dispositif de génération d'aérosol, procédé et système de fabrication d'un consommable
WO2021105471A1 (fr) * 2019-11-29 2021-06-03 Nicoventures Trading Limited Procédé de fabrication d'un solide amorphe destiné à être utilisé avec un système de fourniture d'aérosol non combustible
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WO2021130695A1 (fr) * 2019-12-27 2021-07-01 Nicoventures Trading Limited Substrat avec de multiples matériaux de formation d'aérosol pour dispositif de distribution d'aérosol
WO2021260201A3 (fr) * 2020-06-26 2022-03-17 Nicoventures Trading Limited Appareil de chauffage d'une substance aérosolisable
CN115279212A (zh) * 2019-11-29 2022-11-01 尼科创业贸易有限公司 气溶胶生成
RU2799837C2 (ru) * 2018-07-31 2023-07-12 Никовенчерс Трейдинг Лимитед Выработка аэрозоля
WO2023140662A1 (fr) * 2022-01-24 2023-07-27 Kt&G Corporation Article de génération d'aérosol et dispositif de génération d'aérosol pour le recevoir
EP4079172A4 (fr) * 2019-12-20 2023-10-25 Shenzhen Smoore Technology Limited Élément chauffant flexible, son procédé de fabrication, ensemble chauffant flexible associé, et générateur d'aérosol
WO2024055731A1 (fr) * 2022-09-16 2024-03-21 深圳麦时科技有限公司 Ensemble de chauffage et dispositif de génération d'aérosol
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