US20240074488A1 - Article for use in an aerosol provision system - Google Patents
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- US20240074488A1 US20240074488A1 US18/256,861 US202118256861A US2024074488A1 US 20240074488 A1 US20240074488 A1 US 20240074488A1 US 202118256861 A US202118256861 A US 202118256861A US 2024074488 A1 US2024074488 A1 US 2024074488A1
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- DBRXOUCRJQVYJQ-CKNDUULBSA-N withaferin A Chemical compound C([C@@H]1[C@H]([C@@H]2[C@]3(CC[C@@H]4[C@@]5(C)C(=O)C=C[C@H](O)[C@@]65O[C@@H]6C[C@H]4[C@@H]3CC2)C)C)C(C)=C(CO)C(=O)O1 DBRXOUCRJQVYJQ-CKNDUULBSA-N 0.000 description 1
Images
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
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D1/00—Cigars; Cigarettes
- A24D1/02—Cigars; Cigarettes with special covers
- A24D1/027—Cigars; Cigarettes with special covers with ventilating means, e.g. perforations
-
- 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
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
- A24D3/043—Tobacco smoke filters characterised by their shape or structure with ventilation means, e.g. air dilution
-
- 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
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
-
- 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
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/17—Filters specially adapted for simulated smoking devices
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/20—Devices using solid inhalable precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
- A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
Definitions
- the following relates to an article for use in a non-combustible aerosol provision system, a method of forming an article and a non-combustible aerosol provision system including an article.
- Certain tobacco industry products produce an aerosol during use, which is inhaled by a user.
- tobacco heating devices heat an aerosol generating substrate such as tobacco to form an aerosol by heating, but not burning, the substrate.
- Such tobacco industry products commonly include mouthpieces through which the aerosol passes to reach the user's mouth.
- an article for use as or as part of a non-combustible aerosol provision system comprising:
- a method of forming an article for use as or as part of a non-combustible aerosol provision system comprising providing an aerosol generating material comprising at least one aerosol forming material; and disposing a cylindrical body downstream of the aerosol-generating material, such that the upstream end of the cylindrical body is less than about 22 mm from the downstream end of the aerosol generating material.
- a system comprising: an article according to the first aspect above, and a non-combustible aerosol provision device comprising a heater.
- a system comprising a non-combustible aerosol provision device, and an article according to the first aspect above, wherein the aerosol generating material is provided with an amount of nicotine, and wherein the aerosol generated by the system, in use, comprises at least 30% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 35% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 40% of the amount of nicotine provided in the aerosol generating material prior to use.
- system comprising a non-combustible aerosol provision device, and an article according to the first aspect above, wherein the aerosol generating material is provided with an amount of glycerol, and wherein the aerosol generated by the system, in use, comprises at least 15% of the amount of glycerol provided in the aerosol generating material prior to use, or at least 20% of the amount of glycerol provided in the aerosol generating material prior to use.
- an article for us as or as part of a non-combustible aerosol provision system comprising: an aerosol generating material comprising at least one aerosol forming material; a hollow tubular body disposed downstream of the aerosol generating material, the hollow tubular body comprising one or more ventilation areas; and a substantially cylindrical body disposed downstream of the hollow tubular body, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular body being at least 8 mm, wherein the one or more ventilation areas are provided between 12 mm and 21 mm from the downstream end of the article.
- a method of forming an article according to the sixth aspect comprising: providing an aerosol-generating material comprising at least one aerosol forming material; and disposing a hollow tubular body downstream of the aerosol generating material; disposing a substantially cylindrical body downstream of hollow tubular body, the downstream end of the cylindrical body forming the downstream end of the article, and the distance between the downstream end of the cylindrical body and the downstream end of the hollow tubular body being at least 8 mm; and providing at least one ventilation area between 12 mm and 21 mm from the downstream of the article.
- an article for use as or as part of a non-combustible aerosol provision system comprising: an aerosol generating material comprising at least one aerosol forming material; a hollow tubular member disposed downstream of the aerosol generating material, the hollow tubular member comprising one or more ventilation areas; and a substantially cylindrical body disposed downstream of the hollow tubular member, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular member being at least 8 mm, wherein the one or more ventilation areas are provided less than 3.5 mm from the downstream end of the hollow tubular member.
- a ninth aspect there is provided a system comprising: an article according to the sixth or eighth aspect above, and a non-combustible aerosol provision device comprising a heater.
- FIG. 1 illustrates an article for use as or as part of a non-combustible aerosol provision system, the article comprising a mouth end section comprising a cylindrical body;
- FIG. 2 illustrates an article for use as or as part of a non-combustible aerosol provision system, the mouth end section comprising a capsule;
- FIG. 3 schematically illustrates the steps of a method of manufacturing an article
- FIG. 4 illustrates an article for use as or as part of a non-combustible aerosol provision system, the article comprising a mouth end section comprising a cylindrical body;
- FIG. 5 schematically illustrates the steps of a method of manufacturing an article
- FIG. 6 is a perspective illustration of a non-combustible aerosol provision device for generating aerosol from the aerosol generating material of the articles of FIGS. 1 , 2 and 4 ;
- FIG. 7 illustrates the device of FIG. 6 with the outer cover removed and without an article present
- FIG. 8 is a side view of the device of FIG. 7 in partial cross-section
- FIG. 9 is an exploded view of the device of FIG. 6 , with the outer cover omitted;
- FIG. 10 A is a cross sectional view of a portion of the device of FIG. 6 ;
- FIG. 10 B is a close-up illustration of a region of the device of FIG. 10 A .
- delivery system is intended to encompass systems that deliver at least one substance to a user, and includes:
- a “combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is combusted or burned during use in order to facilitate delivery of at least one substance to a user.
- 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.
- END electronic nicotine delivery system
- the non-combustible aerosol provision system is an aerosol-generating material heating system, also known as a heat-not-burn system.
- a heat-not-burn system is a tobacco heating system.
- the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosolizable materials, one or a plurality of which may be heated.
- Each of the aerosolizable 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 aerosolizable material and a solid aerosolizable material.
- the solid aerosolizable 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 consumables comprising aerosol-generating material and configured to be used with non-combustible aerosol provision devices. These consumables are sometimes referred to as articles throughout the disclosure.
- the aerosol-generating material also referred to as aerosol generating material, can be tobacco material as described herein.
- a consumable is an article comprising or consisting of aerosol-generating material, part or all of which is intended to be consumed during use by a user.
- a consumable may comprise one or more other components, such as an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generation area, a housing, a wrapper, a mouthpiece, a filter and/or an aerosol-modifying agent.
- a consumable may also comprise an aerosol generator, such as a heater, that emits heat to cause the aerosol-generating material to generate aerosol in use.
- the heater may, for example, comprise combustible material, a material heatable by electrical conduction, or a susceptor.
- 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 or an exothermic power source.
- the exothermic power source comprises a carbon substrate which may be energised so as to distribute power in the form of heat to an aerosol-generating material or to a heat transfer material in proximity to the exothermic power source.
- the non-combustible aerosol provision system may comprise an area for receiving the consumable, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/or an aerosol-modifying agent.
- the consumable for use with the non-combustible aerosol provision device may comprise aerosol-generating material, an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.
- the substance to be delivered may be an aerosol-generating material or a material that is not intended to be aerosolised.
- either material 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.
- An aerosol generator is an apparatus configured to cause aerosol to be generated from the aerosol-generating material.
- the aerosol generator is a heater configured to subject the aerosol-generating material to heat energy, so as to release one or more volatiles from the aerosol-generating material to form an aerosol.
- the aerosol generator is configured to cause an aerosol to be generated from the aerosol-generating material without heating.
- the aerosol generator may be configured to subject the aerosol-generating material to one or more of vibration, increased pressure, or electrostatic energy.
- Aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way. Aerosol-generating material may, for example, be in the form of a solid, liquid or gel which may or may not contain an active substance and/or flavorants. In some embodiments, the aerosol-generating material may comprise an “amorphous solid”, which may alternatively be referred to as a “monolithic solid” (i.e. non-fibrous). In some embodiments, the amorphous solid may be a dried gel. The amorphous solid is a solid material that may retain some fluid, such as liquid, within it.
- the aerosol-generating material may for example comprise from about 50 wt %, 60 wt % or 70 wt % of amorphous solid, to about 90 wt %, 95 wt % or 100 wt % of amorphous solid.
- the aerosol-generating material may comprise one or more active substances and/or flavours, one or more aerosol-former materials, and optionally one or more other functional material.
- the aerosol-former material may comprise one or more constituents capable of forming an aerosol.
- the aerosol-former material may comprise one or more of glycerine, glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.
- the one or more other functional materials may comprise one or more of pH regulators, colouring agents, preservatives, binders, fillers, stabilizers, and/or antioxidants.
- the material may be present on or in a support, to form a substrate.
- the support may, for example, be or comprise paper, card, paperboard, cardboard, reconstituted material, a plastics material, a ceramic material, a composite material, glass, a metal, or a metal alloy.
- the support comprises a susceptor.
- the susceptor is embedded within the material. In some alternative embodiments, the susceptor is on one or either side of the material.
- An aerosol-modifying agent is a substance, typically located downstream of the aerosol generation area, that is configured to modify the aerosol generated, for example by changing the taste, flavour, acidity or another characteristic of the aerosol.
- the aerosol-modifying agent may be provided in an aerosol-modifying agent release component that is operable to selectively release the aerosol-modifying agent.
- the aerosol-modifying agent may, for example, be an additive or a sorbent.
- the aerosol-modifying agent may, for example, comprise one or more of a flavorant, a colourant, water, and a carbon adsorbent.
- the aerosol-modifying agent may, for example, be a solid, a liquid, or a gel.
- the aerosol-modifying agent may be in powder, thread or granule form.
- the aerosol-modifying agent may be free from filtration material.
- a susceptor is a material that is heatable by penetration with a varying magnetic field, such as an alternating magnetic field.
- the susceptor may be an electrically-conductive material, so that penetration thereof with a varying magnetic field causes induction heating of the heating material.
- the heating material may be magnetic material, so that penetration thereof with a varying magnetic field causes magnetic hysteresis heating of the heating material.
- the susceptor may be both electrically-conductive and magnetic, so that the susceptor is heatable by both heating mechanisms.
- the device that is configured to generate the varying magnetic field is referred to as a magnetic field generator, herein.
- Induction heating is a process in which an electrically-conductive object is heated by penetrating the object with a varying magnetic field.
- An induction heater may comprise an electromagnet and a device for passing a varying electrical current, such as an alternating current, through the electromagnet.
- a varying electrical current such as an alternating current
- the electromagnet and the object to be heated are suitably relatively positioned so that the resultant varying magnetic field produced by the electromagnet penetrates the object, one or more eddy currents are generated inside the object.
- the object has a resistance to the flow of electrical currents. Therefore, when such eddy currents are generated in the object, their flow against the electrical resistance of the object causes the object to be heated. This process is called Joule, ohmic, or resistive heating.
- An object that is capable of being inductively heated is known as a susceptor.
- the susceptor is in the form of a closed circuit. It has been found that, when the susceptor is in the form of a closed circuit, magnetic coupling between the susceptor and the electromagnet in use is enhanced, which results in greater or improved Joule heating.
- Magnetic hysteresis heating is a process in which an object made of a magnetic material is heated by penetrating the object with a varying magnetic field.
- a magnetic material can be considered to comprise many atomic-scale magnets, or magnetic dipoles. When a magnetic field penetrates such material, the magnetic dipoles align with the magnetic field. Therefore, when a varying magnetic field, such as an alternating magnetic field, for example as produced by an electromagnet, penetrates the magnetic material, the orientation of the magnetic dipoles changes with the varying applied magnetic field. Such magnetic dipole reorientation causes heat to be generated in the magnetic material.
- Articles, for instance those in the shape of rods, are often named according to the product length: “regular” (typically in the range 68-75 mm, e.g. from about 68 mm to about 72 mm), “short” or “mini” (68 mm or less), “king-size” (typically in the range 75-91 mm, e.g. from about 79 mm to about 88 mm), “long” or “super-king” (typically in the range 91-105 mm, e.g. from about 94 mm to about 101 mm) and “ultra-long” (typically in the range from about 110 mm to about 121 mm).
- an article in a king-size, super-slim format will, for example, have a length of about 83 mm and a circumference of about 17 mm.
- Each format may be produced with mouthpieces of different lengths.
- the mouthpiece length will be from about 30 mm to 50 mm.
- a tipping paper connects the mouthpiece to the aerosol generating material and will usually have a greater length than the mouthpiece, for example from 3 to 10 mm longer, such that the tipping paper covers the mouthpiece and overlaps the aerosol generating material, for instance in the form of a rod of substrate material, to connect the mouthpiece to the rod.
- Articles and their aerosol generating materials and mouthpieces described herein can be made in, but are not limited to, any of the above formats.
- upstream and downstream used herein are relative terms defined in relation to the direction of mainstream aerosol drawn though an article or device in use.
- the filamentary tow or filter material described herein can comprise cellulose acetate fibre tow.
- the filamentary tow can also be formed using other materials used to form fibres, such as polyvinyl alcohol (PVOH), polylactic acid (PLA), polycaprolactone (PCL), poly(1-4 butanediol succinate) (PBS), poly(butylene adipate-co-terephthalate)(PBAT), starch based materials, cotton, aliphatic polyester materials and polysaccharide polymers or a combination thereof.
- the filamentary tow may be plasticised with a suitable plasticiser for the tow, such as triacetin where the material is cellulose acetate tow, or the tow may be non-plasticised.
- the tow can have any suitable specification, such as fibres having a cross section which is ‘Y’ shaped, ‘X’ shaped or ‘O’ shaped.
- the fibres of the tow may have filamentary denier values between 2.5 and 15 denier per filament, for example between 8.0 and 11.0 denier per filament and total denier values of 5,000 to 50,000, for example between 10,000 and 40,000.
- the fibres may have an isoperimetric ratio L 2 /A of 25 or less, preferably 20 or less, and more preferably 15 or less, where L is the length of the perimeter of the cross section and A is the area of the cross section.
- Filter material described herein also includes cellulose-based materials such as paper.
- Such materials may have a relatively low density, such as between about 0.1 and about 0.45 grams per cubic centimetre, to allow air and/or aerosol to pass through the material.
- filter materials such materials may have a primary purpose, such as increasing the resistance to draw of a component, that is not related to filtration as such.
- tobacco material refers to any material comprising tobacco or derivatives or substitutes thereof.
- tobacco material may include one or more of tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes.
- the tobacco material may comprise one or more of ground tobacco, tobacco fibre, cut tobacco, extruded tobacco, tobacco stem, tobacco lamina, reconstituted tobacco and/or tobacco extract.
- the tobacco material contains an aerosol forming material.
- an “aerosol forming material” is an agent that promotes the generation of an aerosol.
- An aerosol forming material 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 forming material may improve the delivery of flavour from the aerosol generating material.
- any suitable aerosol forming material or agents may be included in the aerosol generating material of the invention, including those described herein.
- Suitable aerosol forming materials 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 forming material may be glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.
- the total amount of glycerol, propylene glycol, or a mixture of glycerol and propylene glycol used may be in the range of between 10% and 30%, for instance between 15% and 25% of the tobacco material measured on a dry weight basis.
- Glycerol may be 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, may be present in an amount of from 0.1 to 0.3% by weight of the composition.
- 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 B12 or C, melatonin, cannabinoids, or constituents, derivatives, or combinations thereof.
- the active substance may comprise one or more constituents, derivatives or extracts of tobacco, cannabis or another botanical.
- the active substance comprises nicotine. In some embodiments, the active substance comprises caffeine, melatonin or vitamin B12.
- the active substance may comprise 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,
- the mint may be 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, Mentha 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 and the botanical is tobacco.
- 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.
- the active substance comprises or 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 “flavorant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers. They may include naturally occurring flavour materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis , licorice (liquorice), hydrangea , eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya , rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, s
- the flavour comprises menthol, spearmint and/or peppermint. In some embodiments, the flavour comprises flavour components of cucumber, blueberry, citrus fruits and/or redberry. In some embodiments, the flavour comprises eugenol. In some embodiments, the flavour comprises flavour components extracted from tobacco. In some embodiments, the flavour comprises flavour components extracted from Cannabis.
- the flavour may comprise a sensate, which is intended to achieve a somatosensorial sensation which are usually chemically induced and perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in addition to or in place of aroma or taste nerves, and these may include agents providing heating, cooling, tingling, numbing effect.
- a suitable heat effect agent may be, but is not limited to, vanillyl ethyl ether and a suitable cooling agent may be, but not limited to eucolyptol, WS-3.
- FIG. 1 illustrates an article 1 for use as or as part of a non-combustible aerosol provision system.
- the article 1 may be a non-combustible aerosol provision system itself, or alternatively, may be for use with a non-combustible aerosol provision device to form a non-combustible aerosol provision system.
- One suitable non-combustible aerosol provision device 100 comprising a heater 101 is illustrated in FIGS. 6 to 10 B . In other examples, other non-combustible aerosol provision devices may be used.
- the article 1 and other articles described herein can be tobacco heated product consumables.
- the article 1 comprises: a rod of aerosol generating material 2 comprising at least one aerosol forming material; and a mouth end section 20 disposed downstream of the aerosol generating material 2 .
- the mouth end section 20 comprises a hollow tubular body 3 , the hollow tubular body having a wall thickness greater than about 0.5 mm and a cylindrical body 21 disposed immediately downstream of the hollow tubular body 3 .
- the article 1 is configured such that the distance ‘d’ between the downstream end of the aerosol-generating material 2 and the upstream end of the cylindrical body 21 is less than about 22 mm.
- the article further comprises a hollow tubular member 5 disposed immediately upstream of the hollow tubular body 3 .
- the hollow tubular member 5 is disposed between the aerosol generating material 2 and the hollow tubular body 3 .
- the hollow tubular body 3 and hollow tubular member 5 are also referred to herein as cooling sections.
- the combined length of the hollow tubular member 5 and the hollow tubular body 3 is such that the cylindrical body 21 is spaced away from the aerosol generating material by a maximum distance d.
- the hollow tubular member has a length of 12 mm, and the hollow tubular body has a length of 9 mm.
- the cylindrical body 21 is therefore separated from the aerosol generating material by a distance of 21 mm.
- the maximum distance d is 22 mm.
- the distance d may be 21 mm. It has been surprisingly found that by providing a cooling section comprised of a hollow tubular member 5 and a hollow tubular body 3 , configured to extend a maximum of 22 mm from the aerosol generating material, an improved aerosol may be provided.
- the hollow tubular member 5 may have a length of 11 mm and the hollow tubular body 3 may have a length of 10 mm.
- the hollow tubular member 5 may have a length from about 6 mm to about 15 mm, more preferably from about 8 mm to about 12 mm and/or the hollow tubular body 3 may have a length from about 6 mm to about 15 mm, more preferably from about 8 mm to about 12 mm.
- hollow tubular body 3 immediately upstream of cylindrical body 21 can further reduce the condensation of desirable components of the aerosol in the cylindrical body 21 .
- this is due to hollow tubular body 3 channeling aerosol through the centre of the cylindrical body 21 at an increased flow rate.
- the cross sectional area of the cylindrical body through which aerosol passes is effectively reduced, further reducing the potential condensation of desirable components of the aerosol in the cylindrical body 21 .
- the hollow tubular member 5 has a wall thickness of at least 300 microns and/or a permeability of at least 100 Coresta units.
- the hollow tubular member 5 takes up moisture from aerosol generated by the aerosol generating material 2 when the article 1 is heated by the non-combustible aerosol provision device 100 .
- papers with permeability greater than 100 Coresta units are generally low weight and easier to work with during manufacturing.
- the hollow tubular member 5 is configured to have a larger internal diameter, for instance a smaller wall thickness, than the wall thickness of the hollow tubular body 3 .
- the hollow tubular member 5 is formed from paper. Specifically, the hollow tubular member 5 is formed from a plurality of layers of paper which are parallel wound, with butted seams, to form the tubular member 5 , which underlies a wrapper 6 .
- the paper tube provides additional rigidity to the first cavity 5 a .
- first and second paper layers are provided in a two-ply tube, although in other examples 3, 4 or more paper layers can be used forming 3, 4 or more ply tubes.
- Other constructions can be used, such as spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mâché type process, moulded or extruded plastic tubes or similar.
- the hollow tubular member 5 can also be formed using a stiff plug wrap and/or tipping paper, for instance as the wrapper 6 and/or further wrapper 6 ′ described in more detail below, meaning that a separate tubular element is not required.
- the stiff plug wrap and/or tipping paper is manufactured to have a rigidity that is sufficient to withstand the axial compressive forces and bending moments that might arise during manufacture and whilst the article 1 is in use.
- the stiff plug wrap and/or tipping paper can have a basis weight between 70 gsm and 120 gsm, more preferably between 80 gsm and 110 gsm.
- the stiff plug wrap and/or tipping paper can have a thickness between 80 ⁇ m and 200 ⁇ m, more preferably between 100 ⁇ m and 160 ⁇ m, or from 120 ⁇ m to 150 ⁇ m. It can be desirable for both the wrapper 6 and/or further wrapper 6 ′ to have values in these ranges, to achieve an acceptable overall level of rigidity for the hollow tubular member 5 .
- the hollow tubular member 5 may be formed from other materials, such as a moulded or extruded plastic tube, or a fibrous material as described for hollow tubular body 3 .
- the hollow tubular member 5 preferably has a wall thickness, which can be measured, for example using a calliper, of at least about 100 ⁇ m and up to about 1.5 mm, preferably between 100 ⁇ m and 1 mm and more preferably between 150 ⁇ m and 500 ⁇ m, or about 300 ⁇ m. In the present example, the hollow tubular member 5 has a wall thickness of about 250 ⁇ m.
- the length of the hollow tubular member 5 is less than about 20 mm. More preferably, the length of the hollow tubular member 5 is less than about 18 mm. Still more preferably, the length of the hollow tubular member 5 is less than about 15 mm. In addition, or as an alternative, the length of the hollow tubular member 5 is preferably at least about 5 mm. Preferably, the length of the hollow tubular member 5 is at least about 6 mm. In some preferred embodiments, the length of the hollow tubular member 5 is from about 10 mm to about 14 mm, more preferably from about 11 mm to about 13 mm, most preferably about 12 mm. In the present example, the length of the hollow tubular member 5 is 12 mm.
- the hollow tubular body 3 is configured to serve as a heat dissipater to reduce the phenomena of ‘hot puff’.
- Hot puff is defined as aerosol delivered to the user at an uncomfortably high temperature. Hot puff may be exacerbated when a user draws aerosol through a heated article 1 at a high rate, reducing the time for heat in the aerosol to be dissipated.
- the hollow tubular body 3 separates the mouth end section from the heater 101 to provide space for heat to dissipate before the aerosol reaches the downstream end of the article. Further, it shall be appreciated that heat will be conducted away from the aerosol and into the hollow tubular body 3 as the aerosol is drawn therethrough. In this way, the hollow tubular body 3 acts as a heat sink.
- hollow tubular body 3 is formed from filamentary tow.
- other constructions may be used, such as spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mâché type process, tubes formed from paper filter material, moulded or extruded plastic tubes or similar.
- the hollow tubular body 3 preferably has a wall thickness of at least about 325 ⁇ m and up to about 2 mm, preferably between 500 ⁇ m and 2 mm and more preferably between 750 ⁇ m and 1.5 mm. In the present example, the hollow tubular body 3 has a wall thickness of about 1.4 mm.
- the “wall thickness” of the hollow tubular body 3 corresponds to the thickness of the wall of the hollow tubular body 3 in a radial direction. This may be measured, for example, using a caliper.
- the use of filamentary tow and/or wall thicknesses in these ranges have advantage of insulating the hot aerosol passing through the second cavity 3 a from the outer surface of the hollow tubular body 3 .
- the thickness of the wall of the hollow tubular body 3 is at least 325 microns and, preferably, at least 400, 500, 600, 700, 800, 900 or 1000 microns. In some embodiments, the thickness of the wall of the hollow tubular body 3 is at least 1250 or 1500 microns.
- the thickness of the wall of the hollow tubular body 3 is less than 2000 microns and, for instance, less than 1500 microns.
- the increased thickness of the wall of the hollow tubular body 3 means that it has a greater thermal mass, which has been found to help reduce the temperature of the aerosol passing through the hollow tubular body 3 and reduce the surface temperature of the mouth end section 20 at locations downstream of the hollow tubular body 3 . This is thought to be because the greater thermal mass of the hollow tubular body 3 allows the hollow tubular body 3 to absorb more heat from the aerosol in comparison to a hollow tubular body 3 with a thinner wall thickness.
- the increased thickness of the hollow tubular body 3 also channels the aerosol centrally through the mouth end section 20 such that less heat from the aerosol is transferred to the outer portions of the mouth end section 20 .
- the density of the hollow tubular body 3 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 body 3 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 body 3 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 body 3 refers to the density of the filamentary tow forming the element with any plasticiser incorporated.
- the “density” of the material forming the hollow tubular body 3 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 hollow tubular body 3 by the total volume of the material forming the hollow tubular body 3 , wherein the total volume can be calculated using appropriate measurements of the material forming the hollow tubular body 3 taken, for example, using callipers. Where necessary, the appropriate dimensions may be measured using a microscope.
- the filamentary tow forming the hollow tubular body 3 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 13 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 body 3 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 ‘Y’ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used.
- the filamentary tow forming the hollow tubular body 3 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 13 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 body 3 has a denier per filament between 4 and 10, more preferably between 4 and 9.
- the filamentary tow forming the hollow tubular body 3 has an 8Y40,000 tow formed from cellulose acetate and comprising 18% plasticiser, for instance triacetin.
- the hollow tubular body 3 preferably comprises from 10% to 22% by weight of plasticiser.
- the plasticiser is preferably triacetin, although other plasticisers such as polyethelyne glycol (PEG) can be used.
- the hollow tubular body 3 can comprise less than about 18% by weight of plasticiser, such as triacetin, or less than about 17%, less than about 16% or less than about 15%. More preferably, the tubular body 3 comprises from 10% to 20% by weight of plasticiser, for instance about 11%, about 12%, about 13%, about 15%, about 17%, about 18% or about 19% plasticiser.
- the permeability of the material of the wall of the hollow tubular body 3 is at least 100 Coresta Units and, preferably, at least 500 or 1000 Coresta Units.
- the relatively high permeability of the hollow tubular body 3 increases the amount of heat that is transferred to the hollow tubular body 3 from the aerosol and thus reduces the temperature of the aerosol.
- the permeability of the hollow tubular body 3 has also been found to increase the amount of moisture that is transferred from the aerosol to the hollow tubular body 3 , which has been found to improve the feel of the aerosol in the user's mouth.
- a high permeability of hollow tubular body 3 also makes it easier to cut ventilation holes into the hollow tubular body 3 using a laser, meaning that a lower power of laser can be used.
- the hollow tubular body 3 may comprise a filamentary tow comprising filaments having a cross-section with an isoperimetric ratio L 2 /A of 25 or less, 20 or less or 15 or less, where L is the length of the perimeter of the cross section and A is the area of the cross section.
- the filaments may comprise a substantially ‘0’ shaped cross section, or at least as close as it is possible to achieve.
- filaments with a substantially ‘0’ shaped cross section have a lower surface area than other cross sectional shapes, such as ‘Y’ or ‘X’ shaped filaments. Therefore, the delivery of aerosol to the user is improved.
- aerosol drawn through the hollow tubular body 3 passes through both a central second cavity 3 a in the hollow tubular body 3 and also partly through the filaments of the hollow tubular body 3 itself.
- filaments with a substantially ‘o’ shaped cross section, a greater proportion of aerosol will pass through the filament of the hollow tubular body 3 itself, increasing heat transfer to the hollow tubular body 3 yet further.
- hollow tubular body 3 has a length of 9 mm. In other examples, hollow tubular body may have a length up to about 12 mm, for instance 10 mm.
- the hollow tubular body 3 and hollow tubular member 5 are also referred to as cooling sections, and define respective first and second cavities 5 a , 3 a.
- the hollow tubular member 5 and hollow tubular body 3 are each located around and define respective air gaps within the mouthpiece 20 which act as cooling segments.
- the air gaps provide chambers through which heated volatilised components generated by the aerosol generating material 2 flow.
- the first cavity 5 a has an internal volume greater than about 300 mm 3 and/or the second cavity 3 a has an internal volume greater than about 100 mm 3 .
- the first cavity 5 a may have an internal volume of about 310 mm 3 or about 330 mm 3
- the second cavity 3 a may have an internal volume of about 120 mm 3 .
- Providing cavities of at least these volumes has been found to enable the formation of an improved aerosol, as well as providing the cooling function described herein.
- Such cavity sizes provide sufficient space within the mouthpiece 20 to allow heated volatilised components to cool, therefore allowing the exposure of the aerosol generating material 2 to higher temperatures than would otherwise be possible, since they may result in an aerosol which is too warm.
- the relative internal diameters and length of the first and second cavities has been found to be important for improving the quality of the aerosol. It has been advantageously found that providing a tubular member 5 having a length less than 18 mm, or less than the length of the aerosol generating material 2 , reduces the likelihood of desirable components of the aerosol condensing on the inner surface of the tubular member 5 . It has also been surprisingly found that providing a hollow tubular body 3 , having a smaller inner diameter than hollow tubular member 5 , immediately downstream of the hollow tubular member 5 provides a further improvement in the aerosol by channeling the hot aerosol through the centre of the hollow tubular member 5 , further reducing condensation on the inner surface of the tubular member.
- each of the hollow tubular body 3 and the hollow tubular member 5 may be selected from a range of about 2 mm to about 6 mm, about 2 mm to about 5 mm, about 2.5 mm to about 4.5 mm and about 3.0 mm to about 4 mm.
- the inner diameter of the tubular body 3 is selected to be smaller than the inner diameter of the tubular member 5 .
- the second cavity can, for instance, have an internal volume greater than 75 mm 3 , for instance greater than 90 mm 3 , 100 mm 3 , 140 mm 3 , or 150 mm 3 , allowing further improvement of the aerosol.
- the second cavity 3 a comprises a volume of between about 130 mm 3 and about 180 mm 3 , for instance about 150 mm 3 .
- the first cavity can, for instance, have an internal volume greater than 100 mm 3 , for instance greater than 200 mm 3 , 300 mm 3 , 350 cm 3 , 400 mm 3 , or 500 mm 3 , allowing further improvement of the aerosol.
- the first cavity 5 a comprises a volume of between about 300 mm 3 and about 400 mm 3 , or between about 340 mm 3 and about 360 mm 3 for instance about 350 mm 3 .
- the hollow tubular member 5 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 hollow tubular member 5 and a heated volatilised component exiting a second, downstream end of the hollow tubular member 5 .
- the hollow tubular member 5 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 100 degrees Celsius between a heated volatilised component entering a first, upstream end of the hollow tubular member 5 and a heated volatilised component exiting a second, downstream end of the hollow tubular member 5 .
- This temperature differential across the length of the hollow tubular member 5 protects the temperature sensitive second body of material 5 from the high temperatures of the aerosol generating material 3 when it is heated.
- the hollow tubular body 3 can be configured to provide a temperature differential of at least 5 degrees Celsius between a heated volatilised component entering a first, upstream end of the hollow tubular body 3 and a heated volatilised component exiting a second, downstream end of the hollow tubular body 3 .
- the hollow tubular body 3 is preferably configured to provide a temperature differential of at least 10 degrees Celsius, preferably at least 12 degrees Celsius and more preferably at least 15 degrees Celsius between a heated volatilised component entering a first, upstream end of the hollow tubular body 3 and a heated volatilised component exiting a second, downstream end of the hollow tubular body 3 .
- the article further comprises the wrapper 6 at least partially surrounding the aerosol generating material 2 and the hollow tubular member 5 to connect the aerosol generating material 2 to the hollow tubular member 5 .
- the wrapper may extend along the full length of the article 1 to attach the aerosol generating material 2 to the components of the mouth end section 20 .
- a further wrapper 6 ′ underlies the wrapper 6 , and extends along the mouth end section 20 .
- Further wrapper 6 ′ combines the hollow tubular member 5 , the tubular body 3 , cylindrical body 21 , and second tubular body 22 .
- wrapper 6 extends partially along the length of the aerosol generating material 2 to attach the aerosol generating material to the wrapped mouth end section 20 .
- a plug wrap 23 circumscribes the cylindrical body 21 .
- Further wrapper 6 ′ circumscribes and attaches the second tubular body 22 to the body of material 21 , the hollow tubular body 3 , and the hollow tubular member 5 .
- the wrapped second tubular body 22 , cylindrical body 21 , hollow tubular body 3 and hollow tubular member 5 are attached to the aerosol generating material 2 by wrapper 6 .
- the wrapper 6 may be a paper material comprising a citrate, such as sodium nitrate or potassium nitrate.
- the wrapper 6 may have a citrate content of 2% by weight or less, or 1% by weight or less. This reduces charring of the wrapper 6 when the article 1 is heated in the non-combustible aerosol provision device 100 .
- the aerosol generating material 2 described herein is a first aerosol generating material 2 and the hollow tubular body 3 may comprise a second aerosol generating material.
- the second aerosol generating material may be disposed on an inner surface of the hollow tubular body 3 .
- the second aerosol generating material comprises at least one aerosol former material, and may also comprise at least one aerosol modifying agent, or other sensate material.
- the aerosol former material and/or aerosol modifying agent can be any aerosol former material or aerosol modifying agent as described herein, or a combination thereof.
- heat from the first aerosol may aerosolise the aerosol forming material of the second aerosol generating material, to form a second aerosol.
- the second aerosol may comprise a flavorant, which may be additional or complementary to the flavour of the first aerosol.
- Providing a second aerosol generating material on the second hollow tubular body 3 can result in generation of a second aerosol which boosts or complements the flavour or visual appearance of the first aerosol.
- the article 1 may further comprise at least one ventilation area 12 arranged to allow external air to flow into the article.
- the ventilation area 12 comprises a row of ventilation apertures, or perforations, cut into the wrapper 6 .
- the ventilation apertures may extend in a line around the circumference of the article 1 .
- the ventilation area 12 may comprise two or more rows of ventilation apertures.
- the at least one ventilation area 12 is arranged to provide external air into the second cavity 3 a of the hollow tubular body 3 .
- the one or more rows of ventilation apertures extend around the circumference of the article over the hollow tubular body 3 .
- the ventilation area 12 may be provided at a position between 12 mm and 20 mm downstream of the aerosol generating material 2 .
- the ventilation area may be provided at a position about 14.5 mm or 18.5 mm downstream of the aerosol generating material 2 or at a position between 14 mm and 20 mm downstream of the aerosol generating material 2 .
- ventilation may be provided at a position 22.5 mm upstream of the mouth end of the article.
- the ventilation may be provided at a position less than 3.5 mm from the downstream end of the hollow tubular member.
- the ventilation area may be provided at a position about 14.5 mm or 18.5 mm downstream of the aerosol generating material 2 .
- ventilation may be provided at a position 22.5 mm upstream of the mouth end of the article.
- the ventilation area 12 comprises a single row of perforations formed as laser perforations.
- the ventilation area comprises first and second parallel rows of perforations formed as laser perforations, for instance at positions 17.925 mm and 18.625 mm respectively from the mouth end. These perforations pass though the wrapper 6 and hollow tubular body 3 .
- the ventilation can be provided at other locations.
- the perforations pass through the full thickness of the wall of the hollow tubular body 3 .
- the ventilations may be formed through only a portion of the wall thickness of the tubular body.
- the ventilation perforation may extend into the tubular body by a depth of up to about 0.2 mm, or up to about 0.3 mm, or up to about 0.5 mm, or up to about 1 mm, or up to about 1.5 mm.
- the ventilation can be provided via a single row of perforations, for instance laser perforations, into the portion of the article 1 in which the hollow tubular body 3 is located. This has been found to result in improved aerosol formation, which is thought to result from the airflow through the perforations being more uniform than with multiple rows of perforations, for a given ventilation level.
- the ventilation area 12 comprises a single row of laser perforations 18.5 mm downstream of the aerosol generating material 2 .
- the at least one ventilation area 12 is arranged to provide external air into the aerosol generating material 2 .
- the one or more rows of ventilation apertures extend around the circumference of the article over the rod of aerosol generating material 2 .
- the level of ventilation provided by the at least one ventilation area 12 is within the range of 40% to 70% of the volume of aerosol generated by the aerosol generating material 2 passing through the article 1 , when the article 1 is heated in the non-combustible aerosol provision device 100 .
- Aerosol temperature has been found to generally increase with a drop in the ventilation level.
- the relationship between aerosol temperature and ventilation level does not appear to be linear, with variations in ventilation, for instance due to manufacturing tolerances, having less impact at lower target ventilation levels.
- the aerosol temperature could increase by approximately 6° C. at the lower ventilation limit (60% ventilation).
- the aerosol temperature may only increase by approximately 3.5° C. at the lower vent limit (45% ventilation).
- the target ventilation level of the article can therefore be within the range 40% to 70%, for instance, 45% to 65%.
- the mean ventilation level of at least 20 articles can be between 40% and 70%, for instance between 45% and 70% or between 51% and 59%.
- an additional wrapper 10 at least partially surrounds the aerosol generating material 2 , between the aerosol generating material 2 and the wrapper 6 .
- the aerosol generating material is first wrapped by additional wrapper 10 before being attached in combination with the other components of the article 1 by wrapper 6 .
- the additional wrapper 10 surrounding the aerosol generating material has a high level of permeability, for example greater than about 1000 Coresta Units, or greater than about 1500 Coresta Units, or greater than about 2000 Coresta Units.
- the permeability of the additional wrapper 10 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 additional wrapper 10 may be formed from a material with a high inherent level of permeability, an inherently porous material, or may be formed from a material with any level of inherent permeability where the final level of permeability is achieved by providing the additional wrapper 10 with a permeable zone or area. Providing a permeable additional wrapper 10 provides a route for air to enter the smoking article.
- the additional wrapper 10 can be provided with a permeability such that the amount of air entering through the rod of aerosol generating material 2 is relatively more than the amount of air entering the article 1 through the ventilation area 12 in the mouthpiece. An article 1 having this arrangement may produce a more flavoursome aerosol which may be more satisfactory to the user.
- the mouth end section 20 further comprises a second tubular body 22 .
- the second tubular body 22 defines the mouth end of the article 1 .
- the second tubular body 22 may comprise a tube of cellulose acetate stiffened with plasticizer.
- the second tubular body may be constructed in the same way as described for hollow tubular body 3 , and may have a wall thickness and/or density in the range as described for hollow tubular body 3 .
- the second tubular body 22 defines a cavity 22 a in the mouth end section 20 that opens at the mouth end.
- a second tubular body 22 at the downstream end of the article 1 has advantageously been found to significantly reduce the temperature of the outer surface of the article 1 at the downstream end of the mouthpiece which comes into contact with a consumer's mouth when the article 1 is in use.
- the use of the second hollow tubular body 22 has also been found to significantly reduce the temperature of the outer surface of the mouth end section 20 even upstream of the second hollow tubular body 22 . Without wishing to be bound by theory, it is hypothesised that this is due to the second hollow tubular body 22 channeling aerosol closer to the centre of the mouth end section 20 , and therefore reducing the transfer of heat from the aerosol to the outer surface of the article.
- the second hollow tubular body 22 preferably has an internal diameter of greater than 3.0 mm. Smaller diameters than this can result in increasing the velocity of aerosol passing though the mouth end section 20 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 tubular body 22 has an internal diameter of greater than 3.1 mm, and still more preferably greater than 3.5 mm or 3.6 mm. In one embodiment, the internal diameter of the tubular body 22 is about 3.9 mm.
- the “wall thickness” of the second hollow tubular body 22 corresponds to the thickness of the wall of the tube 13 in a radial direction. This may be measured in the same way as for hollow tubular element 8 .
- the wall thickness is advantageously greater than 0.9 mm, and more preferably 1.0 mm or greater.
- the wall thickness is substantially constant around the entire wall of the second hollow tubular element 11 .
- the wall thickness is preferably greater than 0.9 mm at any point around the second hollow tubular element 11 , more preferably 1.0 mm or greater.
- the length of the second hollow tubular body 22 is less than about 20 mm. More preferably, the length of the second hollow tubular body 22 is less than about 15 mm. Still more preferably, the length of the second hollow tubular body 22 is less than about 10 mm. In addition, or as an alternative, the length of the second hollow tubular body 22 is at least about 5 mm. Preferably, the length of the second hollow tubular body 22 is at least about 6 mm. In some preferred embodiments, the length of the second hollow tubular body 22 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 second hollow tubular body 22 is 6 mm.
- the article 1 includes a body of material 21 .
- the body of material is substantially cylindrical, and positioned immediately downstream of the hollow tubular body 3 .
- the body of material 21 is wrapped in an additional wrapping material, such as a first plug wrap 23 .
- the first plug wrap 23 has a basis weight of less than 50 gsm, for instance between about 20 gsm and 40 gsm.
- the first plug wrap 23 can have a thickness of between 30 ⁇ m and 60 ⁇ m, or between 35 ⁇ m and 45 ⁇ m.
- the first plug wrap 23 has a basis weight greater than 65 gsm, for instance greater than 80 gsm, or greater than 95 gsm. In some examples, the first plug wrap 23 has a basis weight of about 100 gsm. It has advantageously been found that providing a first plug wrap having a basis weight in these ranges and comprising an embossed pattern can reduce the temperature of the external surface of the article 1 at a position overlying the cylindrical body 21 .
- first plug wrap 23 may be provided with an embossed pattern comprising a hexagonal repeating pattern, a linear repeating pattern, or a series of raised areas having any suitable shape. Without wishing to be bound by theory, it is thought that providing an embossed first plug wrap 23 can provide an air gap between the plug wrap and the additional wrapper 10 , which can reduce heat transfer to the external surface of the article 1 .
- the first plug wrap 23 is a non-porous plug wrap, for instance having a permeability of less than 100 Coresta units, for instance less than 50 Coresta units.
- the first plug wrap 23 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta units.
- the second tubular body 22 is separated from the hollow tubular body 3 by the body of material 21 .
- the length of the body of material 21 is less than about 15 mm. More preferably, the length of the body of material 21 is less than about 10 mm. In addition, or as an alternative, the length of the body of material 21 is at least about 5 mm. Preferably, the length of the body of material 21 is at least about 6 mm. In some preferred embodiments, the length of the body of material 21 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 21 is 10 mm.
- the body of material 21 can be formed without any cavities or hollow portions, for instance without cavities or hollow portions having a dimension greater than 0.5 mm therein.
- the cylindrical body of material can comprise material which extends substantially continuously throughout its volume. It can, for instance, have a density which is substantially uniform across its diameter and/or along its length.
- the body of material 21 is formed from filamentary tow.
- the tow used in the body of material 21 has a denier per filament (d.p.f.) of 8.4 and a total denier of 21,000.
- the tow can, for instance, have a denier per filament (d.p.f.) of 9.5 and a total denier of 12,000.
- the tow can, for instance, have a denier per filament (d.p.f.) of 8 and a total denier of 15,000.
- the tow comprises plasticised cellulose acetate tow.
- the plasticiser used in the tow comprises about 7% by weight of the tow.
- the plasticiser is triacetin.
- the body 21 can be formed from paper, for instance in a similar way to paper filters known for use in cigarettes.
- the body 21 can be formed from tows other than cellulose acetate, for instance polylactic acid (PLA), other materials described herein for filamentary tow or similar materials, such as paper filter material.
- PVA polylactic acid
- 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, more preferably at least 6 and still more preferably at least 7.
- the tow has relatively coarse, thick fibres with a lower surface area which result in a lower pressure drop across the body of material 21 than tows having lower d.p.f. values.
- 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 21 is preferably at most 30,000, more preferably at most 28,000 and still more preferably at most 25,000. These values of total denier provide a tow which takes up a reduced proportion of the cross sectional area of the article 1 which results in a lower pressure drop across the article 1 than tows having higher total denier values.
- 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. More preferably, the denier per filament is between 6 and 10 while the total denier is between 11,000 and 22,000.
- the cross-sectional shape of the filaments of tow are ‘Y’ shaped, although in other embodiments other shapes such as ‘X’ shaped or ‘O’ shaped filaments can be used, with the same d.p.f. and total denier values as provided herein.
- the tow may comprise filaments having a cross-section with an isoperimetric ratio of 25 or less, preferably 20 or less, and more preferably 15 or less.
- the body of material 21 may comprise an adsorbent material (e.g. charcoal) dispersed within the tow.
- the pressure drop across body 6 can, for instance, be between 0.2 and 5 mmWG per mm of length of the body 6 , for instance between 0.5 mmWG and 3 mmWG per mm of length of the body 6 .
- the pressure drop can, for instance, be between 0.5 and 2.5 mmWG/mm of length, between 1 and 1.5 mmWG/mm of length or between 1.5 and 2.5 mmWG/mm of length.
- the total pressure drop across body 6 can, for instance, be between 2 mmWG and 8 mWG, or between 4 mmWG and 7 mmWG.
- the total pressure drop across body 6 can be about 5, 6 or 7 mmWG.
- FIG. 2 illustrates an article 1 ′ for use as or as part of a non-combustible aerosol provision system.
- Article 1 ′ is the same as article 1 , except that cylindrical body 21 of the mouth end section 20 ′ comprises a capsule 24 .
- the capsule 24 can comprise a breakable capsule, for instance a capsule which has a solid, frangible shell surrounding a liquid payload. In the present example, a single capsule is used.
- the capsule is entirely embedded within the body of material 21 . In other words, the capsule is completely surrounded by the material forming the body.
- a plurality of breakable capsules may be disposed within the body of material 21 , for instance 2, 3 or more breakable capsules.
- the length of the body of material 21 can be increased to accommodate the number of capsules required.
- the individual capsules may be the same as each other, or may differ from one another in terms of size and/or capsule payload.
- multiple bodies of material may be provided, with each body containing one or more capsules.
- the capsule 24 has a core-shell structure.
- the capsule 24 comprises a shell encapsulating a liquid agent, for instance a flavorant or other agent, which can be any one of the flavorants or aerosol modifying agents described herein.
- the shell of the capsule 24 can be ruptured by a user to release the flavorant or other agent into the body of material 21 .
- the first plug wrap 23 can comprise a barrier coating to make the material of the plug wrap substantially impermeable to the liquid payload of the capsule.
- the further wrapper 6 ′ and/or wrapping material 6 can comprise a barrier coating to make the material of that further wrapper 6 ′ and/or wrapping material 6 substantially impermeable to the liquid payload of the capsule.
- the capsule is spherical and has a diameter of about 3 mm. In other examples, other shapes and sizes of capsule can be used.
- the total weight of the capsule may be in the range about 10 mg to about 50 mg.
- tow capability curve which represents the pressure drop through a length of rod formed using the tow, for each of a range of tow weights. Parameters such as the rod length and circumference, wrapper thickness and tow plasticiser level are specified, and these are combined with the tow specification to generate the tow capability curve, which gives an indication of the pressure drop which would be provided by different tow weights between the minimum and maximum weights achievable using standard filter rod forming machinery.
- Such tow capability curves can be calculated, for instance, using software available from tow suppliers.
- a body of material 21 which includes filamentary tow having a weight per mm of length of the body of material 21 which is between about 10% and about 30% of the range between the minimum and maximum weights of a tow capability curve generated for the filamentary tow. This can provide an acceptable balance between providing enough tow weight to avoid shrinkage after the body 21 has been formed, providing an acceptable pressure drop, while also assisting with capsule placement within the tow, for capsules of the sizes described herein.
- a control sample and an article according to the claimed invention were tested, as described below, to determine the distribution of nicotine and glycerol, desirable components of the aerosol, throughout the article after use.
- the pre-use level of glycerol and nicotine in the aerosol generating material was also determined using mass balance analysis, as described below.
- the control sample comprises an aerosol generating material section having a length of 30 mm, a tubular member 5 arranged immediately downstream of the aerosol generating section, having a length of 17 mm, a cylindrical body 21 having a length of 10 mm, and a second tubular body 22 having a length of 6 mm.
- Sample A has the same general construction as illustrated in and described with reference to FIG. 1 , and comprises an aerosol generating material section having a length of 30 mm, a tubular member 5 arranged immediately downstream of the aerosol generating section and having a length of 8 mm, a first tubular body 3 having a length of 9 mm, a cylindrical body 21 having a length of 10 mm, and a second tubular body 22 having a length of 6 mm.
- Samples for mass balance analysis were taken of the aerosol generating material 2 ; the cooling section, which comprises the first tubular body 3 , and where present, the tubular member 5 ; and a mouth end portion, comprising the cylindrical body 21 and the second tubular body 22 .
- the amount of nicotine and glycerol in each of the mouth end section, the cooling section and the aerosol generating section after use of the article can be determined using mass balance analysis.
- the amount of nicotine and glycerol present in the delivered aerosol can be determined using emissions analysis.
- Mass balance analysis and emissions analysis are techniques which are known to the person skilled in the art.
- Example A Average nicotine content in sections of a control article, and an article according to the present disclosure (sample A). Mean nicotine per component Mouth Aerosol (mg/unit) as percentage of total end Cooling generating pre-use nicotine content Aerosol portion section material Control 27% 34% 25% 14% Sample A 48% 15% 24% 13% % difference between control 78% ⁇ 56% ⁇ 4% ⁇ 7% and sample A
- Example A Average glycerol content in sections of a control article, and an article according to the present disclosure (sample A).
- mass balance analysis was performed to determine the amount of a given substance (in the examples in tables 1 and 2 herein, nicotine and glycerol respectively), present in a given section of the article after use. Mass balance analysis was also used to determine the amount of nicotine and glycerol present in a given section of the article prior to use, so that both the distribution of the substance in the article and the amount present in the aerosol generated from an article could be compared to the total amount of the substance initially provided.
- the article does not refer to a single specific article, but rather an article having a specific design or configuration, which is therefore comparable to other articles having the same specific design or configuration.
- a number of such articles will have been analysed to obtain the values presented herein, which represent mean values, as described in further detail below.
- the same individual article is not tested both before and after use, to obtain the pre and post use data points. Instead, the pre use data will be obtained from a number of articles having a specific design or configuration, and the post use data will be obtained from a separate number of articles having the same specific design or configuration.
- the article is deconstructed into sections.
- the number of articles deconstructed to obtain samples is such that the total mass of the samples to be analysed is at least 1 gram.
- Each sample comprises a number of the relevant components of the deconstructed article (e.g. the aerosol generating material section 2 , or the cylindrical body 21 and second tubular body 22 ), the number being sufficient that the total mass of the components taken from a number of articles have a combined mass of at least 1 gram.
- At least three repetitions of mass balance analysis each repetition performed on a new sample obtained from a new set of articles, should be carried out.
- mass balance analysis employing the sampling protocol described in the preceding paragraph was performed to determine the pre-use nicotine and glycerol content of the article.
- Emissions analysis can be performed using a standard puffing regime, and a heating device intended for use with the article, to determine the nicotine and glycerol content of the generated aerosol.
- the puffing regime is according to the ISO intense regime (where this includes a 55 ml puff volume, a 30 s interval between puffs, and a 2 s puff duration), but with any ventilation in the open configuration. Where the device has any ‘boost’ or additional smoking functions, these should not be used for performing the test.
- a comparison between the nicotine and glycerol content of the aerosol in the control article and sample A reveals that 78% more nicotine and 85% more glycerol was present in the aerosol produced from sample A.
- a significantly increased amount of desirable components of the aerosol is therefore available for delivery to a user in articles prepared according to the present disclosure.
- a method of manufacturing an article for use with a non-combustible aerosol provision device 100 comprising a heater 101 will now be described with reference to FIG. 3 .
- the method comprises:
- FIG. 4 illustrates an article 1 ′′ for use as or as part of a non-combustible aerosol provision system.
- Article 1 ′′ includes many of the same features as article 1 and article 1 ′, where like reference numerals refer to like features.
- Article 1 ′′ differs from article 1 in that it does not comprise a hollow tubular body 3 . Instead, hollow tubular member 5 defines the cavity 5 a to form the whole length of the cooling section.
- article 1 ′′ differs from article 1 in that it does not comprise a second hollow tubular body 22 downstream of the body of material 21 . Instead, the downstream end of the body of material 21 forms the downstream end of the article 1 ′′.
- the second hollow tubular body 22 may be provided downstream of the body of material 21 according to some examples.
- the length of the body of material 21 is approximately 12 mm long. Preferably, the length of the body of material 21 is less than about 17 mm. In addition, or as an alternative, the length of the body of material 21 is at least about 8 mm. In some preferred embodiments, the length of the body of material 21 is from about 8 mm to about 17 mm, more preferably from about 10 mm to about 14 mm, even more preferably from about 11 mm to about 13 mm, most preferably about 11 mm, 12 mm, or 13 mm, 9 mm or 10 mm. In other preferred embodiments, the length of the body of material may be from 15 mm to 17 mm, more preferably about 16 mm.
- At least one further body of material is provided downstream of the aerosol generating material, such as between the aerosol generating material and the body of material 21 .
- the combined length of the body of material 21 and the at least one further body of material may have a combined length corresponding to any of the lengths described above with reference to the body of material 21 .
- the article 1 ′′ may comprise a rod of aerosol generating material 2 having a length of approximately 26 mm.
- the rod of aerosol generating material 2 may be any suitable length as will be understood by the skilled person.
- a distance d′ between the downstream end of the article and the ventilation area 12 in FIG. 4 is between 12 mm and 21 mm from the downstream end of the article.
- the distance d′ between the downstream end of the article is between 16 mm and 20 mm, or between 18 mm and 19 mm from the downstream end of the article.
- the distance d′ between the downstream end of the article and the ventilation area is approximately 18.5 mm from the downstream end of the article.
- the ventilation area may be provided at approximately 15 mm, 16 mm, 17 mm, or 18 mm from the downstream end of the article.
- the ventilation area is preferably provided at 3.5 mm or less from the downstream end of the hollow tubular member. In the present example, the ventilation area is provided at 2.5 mm from the downstream end of the hollow tubular member.
- the aerosol temperature is reduced the closer the ventilation position is provided to the mouth end of the article. Accordingly, improved cooling of aerosol can be achieved by locating the ventilation position closer to the mouth end.
- the ventilation area may be provided in the wrapper 6 surrounding the hollow tubular member 5 , in the same way for article 1 of FIG. 1 .
- the ventilation area is provided as holes or perforations.
- the holes or perforations may be alternatively or additionally provided in the hollow tubular member 5 .
- the ventilation area 12 is provided by a double row of perforations disposed at 18.5 mm from the mouth end.
- the ventilation level in this example is 60%.
- the reduction in NNK was found to be 91.2% compared to 87.2% for a corresponding article provided with a ventilation area at 22.5 mm from the mouth end of the article. Accordingly, it can be seen that the reduction in NNK is around 4% lower for the article provided with ventilation at 22.5 mm from the mouth end of the article compared to article 1 ′′ provided with ventilation at 18.5 mm from the mouth end of the article.
- the reduction in NNN was found to be 80.6% compared to 55.5% for a corresponding article provided with a ventilation area at 22.5 mm from the mouth end of the article. Accordingly, it can be seen that the reduction in NNN is around 25% lower for the article provided with ventilation at 22.5 mm from the mouth end of the article compared to the article 1 ′′ provided with ventilation at 18.5 mm from the mouth end of the article.
- nicotine delivery of an article as illustrated in FIG. 4 was found to provide nicotine delivery of 0.84 mg/cig compared to 0.71 mg/cig for a corresponding article having a ventilation area of 22.5 mm from the mouth end of the article.
- an article 1 ′′ as illustrated in FIG. 4 can provide higher deliveries of nicotine and aerosol while reducing the levels of undesirable toxicants by providing a ventilation area closer to the mouth end of the article.
- a method of manufacturing an article 1 ′′ for use with a non-combustible aerosol provision device 100 comprising a heater 101 will now be described with reference to FIG. 5 .
- the method comprises:
- the method may also be performed in conjunction with the method described in relation to FIG. 3 , such that the cylindrical body is less than about 22 mm from the downstream end of the aerosol generating material.
- FIG. 6 shows an example of a non-combustible aerosol provision device 100 comprising a heater 101 for generating aerosol from an aerosol generating medium/material such as the aerosol generating material 2 of any of the articles 1 , 1 ′, 1 ′′ described herein.
- a generic article 110 illustrated in FIGS. 6 to 10 B can be considered to correspond to any of the articles 1 , 1 ′, 1 ′′ described herein.
- the device 100 may be used to heat a replaceable article 110 comprising the aerosol generating medium, for instance the article 10 described herein, to generate an aerosol or other inhalable medium which is inhaled by a user of the device 100 .
- the device 100 and replaceable article 110 together form a system.
- the device 100 comprises a housing 102 (in the form of an outer cover) which surrounds and houses various components of the device 100 .
- the device 100 has an opening 104 in one end, through which the article 110 may be inserted for heating by a heater 101 , hereinafter referred to as the heating assembly.
- the heating assembly In use, the article 110 may be fully or partially inserted into the heating assembly where it may be heated by one or more components of the heater assembly.
- the device 100 of this example comprises a first end member 106 which comprises a lid 108 which is moveable relative to the first end member 106 to close the opening 104 when no article 110 is in place.
- the lid 108 is shown in an open configuration, however the lid 108 may move into a closed configuration.
- a user may cause the lid 108 to slide in the direction of arrow “B”.
- the device 100 may also include a user-operable control element 112 , such as a button or switch, which operates the device 100 when pressed. For example, a user may turn on the device 100 by operating the switch 112 .
- a user-operable control element 112 such as a button or switch
- the device 100 may also comprise an electrical component, such as a socket/port 114 , which can receive a cable to charge a battery of the device 100 .
- the socket 114 may be a charging port, such as a USB charging port.
- FIG. 7 depicts the device 100 of FIG. 6 with the outer cover 102 removed and without an article 110 present.
- the device 100 defines a longitudinal axis 134 .
- the first end member 106 is arranged at one end of the device 100 and a second end member 116 is arranged at an opposite end of the device 100 .
- the first and second end members 106 , 116 together at least partially define end surfaces of the device 100 .
- the bottom surface of the second end member 116 at least partially defines a bottom surface of the device 100 .
- Edges of the outer cover 102 may also define a portion of the end surfaces.
- the lid 108 also defines a portion of a top surface of the device 100 .
- the end of the device closest to the opening 104 may be known as the proximal end (or mouth end) of the device 100 because, in use, it is closest to the mouth of the user.
- a user inserts an article 110 into the opening 104 , operates the user control 112 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 100 along a flow path towards the proximal end of the device 100 .
- the other end of the device furthest away from the opening 104 may be known as the distal end of the device 100 because, in use, it is the end furthest away from the mouth of the user. As a user draws on the aerosol generated in the device, the aerosol flows away from the distal end of the device 100 .
- the device 100 further comprises a power source 118 .
- the power source 118 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 heating assembly to supply electrical power when required and under control of a controller (not shown) to heat the aerosol generating material.
- the battery is connected to a central support 120 which holds the battery 118 in place.
- the device further comprises at least one electronics module 122 .
- the electronics module 122 may comprise, for example, a printed circuit board (PCB).
- the PCB 122 may support at least one controller, such as a processor, and memory.
- the PCB 122 may also comprise one or more electrical tracks to electrically connect together various electronic components of the device 100 .
- the battery terminals may be electrically connected to the PCB 122 so that power can be distributed throughout the device 100 .
- the socket 114 may also be electrically coupled to the battery via the electrical tracks.
- the heating assembly is an inductive heating assembly and comprises various components to heat the aerosol generating material of the article 110 via an inductive heating process.
- Induction heating is a process of heating an electrically conducting object (such as a susceptor) by electromagnetic induction.
- An induction heating assembly 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 induction heating assembly of the example device 100 comprises a susceptor arrangement 132 (herein referred to as “a susceptor”), a first inductor coil 124 and a second inductor coil 126 .
- the first and second inductor coils 124 , 126 are made from an electrically conducting material.
- the first and second inductor coils 124 , 126 are made from Litz wire/cable which is wound in a helical fashion to provide helical inductor coils 124 , 126 .
- 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 first and second inductor coils 124 , 126 are made from copper Litz wire which has a rectangular cross section. In other examples the Litz wire can have other shape cross sections, such as circular.
- the first inductor coil 124 is configured to generate a first varying magnetic field for heating a first section of the susceptor 132 and the second inductor coil 126 is configured to generate a second varying magnetic field for heating a second section of the susceptor 132 .
- the first inductor coil 124 is adjacent to the second inductor coil 126 in a direction along the longitudinal axis 134 of the device 100 (that is, the first and second inductor coils 124 , 126 to not overlap).
- the susceptor arrangement 132 may comprise a single susceptor, or two or more separate susceptors. Ends 130 of the first and second inductor coils 124 , 126 can be connected to the PCB 122 .
- first and second inductor coils 124 , 126 may have at least one characteristic different from each other.
- the first inductor coil 124 may have at least one characteristic different from the second inductor coil 126 .
- the first inductor coil 124 may have a different value of inductance than the second inductor coil 126 .
- the first and second inductor coils 124 , 126 are of different lengths such that the first inductor coil 124 is wound over a smaller section of the susceptor 132 than the second inductor coil 126 .
- the first inductor coil 124 may comprise a different number of turns than the second inductor coil 126 (assuming that the spacing between individual turns is substantially the same).
- the first inductor coil 124 may be made from a different material to the second inductor coil 126 .
- the first and second inductor coils 124 , 126 may be substantially identical.
- the first inductor coil 124 and the second inductor coil 126 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 124 may be operating to heat a first section/portion of the article 110 , and at a later time, the second inductor coil 126 may be operating to heat a second section/portion of the article 110 . 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 FIG. 5 , the first inductor coil 124 is a right-hand helix and the second inductor coil 126 is a left-hand helix.
- the inductor coils 124 , 126 may be wound in the same direction, or the first inductor coil 124 may be a left-hand helix and the second inductor coil 126 may be a right-hand helix.
- the susceptor 132 of this example is hollow and therefore defines a receptacle within which aerosol generating material is received.
- the article 110 can be inserted into the susceptor 132 .
- the susceptor 120 is tubular, with a circular cross section.
- the susceptor 132 may be made from one or more materials.
- the susceptor 132 comprises carbon steel having a coating of Nickel or Cobalt.
- the susceptor 132 may comprise at least two materials capable of being heated at two different frequencies for selective aerosolization of the at least two materials.
- a first section of the susceptor 132 (which is heated by the first inductor coil 124 ) may comprise a first material
- a second section of the susceptor 132 which is heated by the second inductor coil 126 may comprise a second, different material.
- the first section may comprise first and second materials, where the first and second materials can be heated differently based upon operation of the first inductor coil 124 .
- the first and second materials may be adjacent along an axis defined by the susceptor 132 , or may form different layers within the susceptor 132 .
- the second section may comprise third and fourth materials, where the third and fourth materials can be heated differently based upon operation of the second inductor coil 126 .
- the third and fourth materials may be adjacent along an axis defined by the susceptor 132 , or may form different layers within the susceptor 132 .
- Third material may the same as the first material, and the fourth material may be the same as the second material, for example. Alternatively, each of the materials may be different.
- the susceptor may comprise carbon steel or aluminium for example.
- the device 100 of FIG. 7 further comprises an insulating member 128 which may be generally tubular and at least partially surround the susceptor 132 .
- the insulating member 128 may be constructed from any insulating material, such as plastic for example.
- the insulating member is constructed from polyether ether ketone (PEEK).
- PEEK polyether ether ketone
- the insulating member 128 can also fully or partially support the first and second inductor coils 124 , 126 .
- the first and second inductor coils 124 , 126 are positioned around the insulating member 128 and are in contact with a radially outward surface of the insulating member 128 .
- the insulating member 128 does not abut the first and second inductor coils 124 , 126 .
- a small gap may be present between the outer surface of the insulating member 128 and the inner surface of the first and second inductor coils 124 , 126 .
- the susceptor 132 , the insulating member 128 , and the first and second inductor coils 124 , 126 are coaxial around a central longitudinal axis of the susceptor 132 .
- FIG. 8 shows a side view of device 100 in partial cross-section.
- the outer cover 102 is present in this example.
- the rectangular cross-sectional shape of the first and second inductor coils 124 , 126 is more clearly visible.
- the device 100 further comprises a support 136 which engages one end of the susceptor 132 to hold the susceptor 132 in place.
- the support 136 is connected to the second end member 116 .
- the device may also comprise a second printed circuit board 138 associated within the control element 112 .
- the device 100 further comprises a second lid/cap 140 and a spring 142 , arranged towards the distal end of the device 100 .
- the spring 142 allows the second lid 140 to be opened, to provide access to the susceptor 132 .
- a user may open the second lid 140 to clean the susceptor 132 and/or the support 136 .
- the device 100 further comprises an expansion chamber 144 which extends away from a proximal end of the susceptor 132 towards the opening 104 of the device. Located at least partially within the expansion chamber 144 is a retention clip 146 to abut and hold the article 110 when received within the device 100 .
- the expansion chamber 144 is connected to the end member 106 .
- FIG. 9 is an exploded view of the device 100 of FIG. 8 , with the outer cover 102 omitted.
- FIG. 10 A depicts a cross section of a portion of the device 100 of FIG. 8 .
- FIG. 10 B depicts a close-up of a region of FIG. 10 A .
- FIGS. 10 A and 10 B show the article 110 received within the susceptor 132 , where the article 110 is dimensioned so that the outer surface of the article 110 abuts the inner surface of the susceptor 132 . This ensures that the heating is most efficient.
- the article 110 of this example comprises aerosol generating material 110 a .
- the aerosol generating material 110 a is positioned within the susceptor 132 .
- the article 110 may also comprise other components such as a filter, wrapping materials and/or a cooling structure.
- FIG. 10 B shows that the outer surface of the susceptor 132 is spaced apart from the inner surface of the inductor coils 124 , 126 by a distance 150 , measured in a direction perpendicular to a longitudinal axis 158 of the susceptor 132 .
- the distance 150 is about 3 mm to 4 mm, about 3-3.5 mm, or about 3.25 mm.
- FIG. 10 B further shows that the outer surface of the insulating member 128 is spaced apart from the inner surface of the inductor coils 124 , 126 by a distance 152 , measured in a direction perpendicular to a longitudinal axis 158 of the susceptor 132 .
- the distance 152 is about 0.05 mm.
- the distance 152 is substantially 0 mm, such that the inductor coils 124 , 126 abut and touch the insulating member 128 .
- the susceptor 132 has a wall thickness 154 of about 0.025 mm to 1 mm, or about 0.05 mm.
- the susceptor 132 has a length of about 40 mm to 60 mm, about 40 mm to 45 mm, or about 44.5 mm.
- the insulating member 128 has a wall thickness 156 of about 0.25 mm to 2 mm, 0.25 mm to 1 mm, or about 0.5 mm.
- the article 1 , 1 ′, 1 ′′ described herein can be inserted into a non-combustible aerosol provision device such as the device 100 described with reference to FIGS. 6 to 10 B .
- a non-combustible aerosol provision device such as the device 100 described with reference to FIGS. 6 to 10 B .
- At least a portion of the mouthpiece 20 of the article 110 protrudes from the non-combustible aerosol provision device 100 and can be placed into a user's mouth.
- An aerosol is produced by heating the aerosol generating material 2 using the device 100 .
- the aerosol produced by the aerosol generating material 2 passes through the mouthpiece 20 to the user's mouth.
Abstract
Articles and related methods and systems for use as or as part of a non-combustible aerosol provision system including an aerosol-generating material having at least one aerosol forming material and a cylindrical body disposed downstream of the aerosol-generating material. The distance (d) between the downstream end of the aerosol-generating material and the upstream end of the cylindrical body is less than about 22 mm. A hollow tubular member can be disposed downstream of the aerosol generating material, the hollow tubular member having one or more ventilation areas,
Description
- The present application is a National Phase entry of PCT Application No. PCT/GB2021/053236, filed Dec. 10, 2021, which claims priority from GB Application No. 2019584.8, filed Dec. 11, 2020; GB Application No. 2020307.1, filed Dec. 21, 2020; and GB Application No. 2105211.3, filed Apr. 12, 2021 each of which is hereby fully incorporated herein by reference.
- The following relates to an article for use in a non-combustible aerosol provision system, a method of forming an article and a non-combustible aerosol provision system including an article.
- Certain tobacco industry products produce an aerosol during use, which is inhaled by a user. For example, tobacco heating devices heat an aerosol generating substrate such as tobacco to form an aerosol by heating, but not burning, the substrate. Such tobacco industry products commonly include mouthpieces through which the aerosol passes to reach the user's mouth.
- In some embodiments described herein, in a first aspect there is provided an article for use as or as part of a non-combustible aerosol provision system, the article comprising:
-
- an aerosol generating material comprising at least one aerosol forming material; and
- a cylindrical body disposed downstream of the aerosol-generating material, wherein the distance between the downstream end of the aerosol-generating material and the upstream end of the cylindrical body is less than about 22 mm.
- In some embodiments described herein, in a second aspect there is provided a method of forming an article for use as or as part of a non-combustible aerosol provision system, the method comprising providing an aerosol generating material comprising at least one aerosol forming material; and disposing a cylindrical body downstream of the aerosol-generating material, such that the upstream end of the cylindrical body is less than about 22 mm from the downstream end of the aerosol generating material.
- In some embodiments described herein, in a third aspect there is provided a system comprising: an article according to the first aspect above, and a non-combustible aerosol provision device comprising a heater.
- In some embodiments described herein, in a fourth aspect there is provided a system comprising a non-combustible aerosol provision device, and an article according to the first aspect above, wherein the aerosol generating material is provided with an amount of nicotine, and wherein the aerosol generated by the system, in use, comprises at least 30% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 35% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 40% of the amount of nicotine provided in the aerosol generating material prior to use.
- In some embodiments described herein, in a fifth aspect there is provided system comprising a non-combustible aerosol provision device, and an article according to the first aspect above, wherein the aerosol generating material is provided with an amount of glycerol, and wherein the aerosol generated by the system, in use, comprises at least 15% of the amount of glycerol provided in the aerosol generating material prior to use, or at least 20% of the amount of glycerol provided in the aerosol generating material prior to use.
- In some embodiments described herein, in a sixth aspect there is provided an article for us as or as part of a non-combustible aerosol provision system, the article comprising: an aerosol generating material comprising at least one aerosol forming material; a hollow tubular body disposed downstream of the aerosol generating material, the hollow tubular body comprising one or more ventilation areas; and a substantially cylindrical body disposed downstream of the hollow tubular body, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular body being at least 8 mm, wherein the one or more ventilation areas are provided between 12 mm and 21 mm from the downstream end of the article.
- In some embodiments described herein, in a seventh aspect there is provided a method of forming an article according to the sixth aspect, the method comprising: providing an aerosol-generating material comprising at least one aerosol forming material; and disposing a hollow tubular body downstream of the aerosol generating material; disposing a substantially cylindrical body downstream of hollow tubular body, the downstream end of the cylindrical body forming the downstream end of the article, and the distance between the downstream end of the cylindrical body and the downstream end of the hollow tubular body being at least 8 mm; and providing at least one ventilation area between 12 mm and 21 mm from the downstream of the article.
- According to an eighth aspect there is provided an article for use as or as part of a non-combustible aerosol provision system, the article comprising: an aerosol generating material comprising at least one aerosol forming material; a hollow tubular member disposed downstream of the aerosol generating material, the hollow tubular member comprising one or more ventilation areas; and a substantially cylindrical body disposed downstream of the hollow tubular member, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular member being at least 8 mm, wherein the one or more ventilation areas are provided less than 3.5 mm from the downstream end of the hollow tubular member.
- In some embodiments described herein, in a ninth aspect there is provided a system comprising: an article according to the sixth or eighth aspect above, and a non-combustible aerosol provision device comprising a heater.
- Embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which:
-
FIG. 1 illustrates an article for use as or as part of a non-combustible aerosol provision system, the article comprising a mouth end section comprising a cylindrical body; -
FIG. 2 illustrates an article for use as or as part of a non-combustible aerosol provision system, the mouth end section comprising a capsule; -
FIG. 3 schematically illustrates the steps of a method of manufacturing an article; -
FIG. 4 illustrates an article for use as or as part of a non-combustible aerosol provision system, the article comprising a mouth end section comprising a cylindrical body; -
FIG. 5 schematically illustrates the steps of a method of manufacturing an article; -
FIG. 6 is a perspective illustration of a non-combustible aerosol provision device for generating aerosol from the aerosol generating material of the articles ofFIGS. 1, 2 and 4 ; -
FIG. 7 illustrates the device ofFIG. 6 with the outer cover removed and without an article present; -
FIG. 8 is a side view of the device ofFIG. 7 in partial cross-section; -
FIG. 9 is an exploded view of the device ofFIG. 6 , with the outer cover omitted; -
FIG. 10A is a cross sectional view of a portion of the device ofFIG. 6 ; and -
FIG. 10B is a close-up illustration of a region of the device ofFIG. 10A . - As used herein, 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 comprise nicotine.
- According to the present disclosure, a “combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is combusted or burned during use in order to facilitate delivery of at least one substance to a user.
- According to the present disclosure, 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.
- In embodiments described herein, the delivery system is a non-combustible aerosol provision system, such as a powered non-combustible aerosol provision system.
- In some embodiments, 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.
- In some embodiments, 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.
- In one embodiment, the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosolizable materials, one or a plurality of which may be heated. Each of the aerosolizable materials may be, for example, in the form of a solid, liquid or gel and may or may not contain nicotine. In one embodiment, the hybrid system comprises a liquid or gel aerosolizable material and a solid aerosolizable material. The solid aerosolizable material may comprise, for example, tobacco or a non-tobacco product.
- Typically, 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.
- In some embodiments, the disclosure relates to consumables comprising aerosol-generating material and configured to be used with non-combustible aerosol provision devices. These consumables are sometimes referred to as articles throughout the disclosure. The aerosol-generating material, also referred to as aerosol generating material, can be tobacco material as described herein.
- A consumable is an article comprising or consisting of aerosol-generating material, part or all of which is intended to be consumed during use by a user. A consumable may comprise one or more other components, such as an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generation area, a housing, a wrapper, a mouthpiece, a filter and/or an aerosol-modifying agent. A consumable may also comprise an aerosol generator, such as a heater, that emits heat to cause the aerosol-generating material to generate aerosol in use. The heater may, for example, comprise combustible material, a material heatable by electrical conduction, or a susceptor.
- In some embodiments, 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 or an exothermic power source. In some embodiments, the exothermic power source comprises a carbon substrate which may be energised so as to distribute power in the form of heat to an aerosol-generating material or to a heat transfer material in proximity to the exothermic power source.
- In some embodiments, the non-combustible aerosol provision system may comprise an area for receiving the consumable, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/or an aerosol-modifying agent.
- In some embodiments, the consumable for use with the non-combustible aerosol provision device may comprise aerosol-generating material, an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.
- In some embodiments, the substance to be delivered may be an aerosol-generating material or a material that is not intended to be aerosolised. As appropriate, either material 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.
- An aerosol generator is an apparatus configured to cause aerosol to be generated from the aerosol-generating material. In some embodiments, the aerosol generator is a heater configured to subject the aerosol-generating material to heat energy, so as to release one or more volatiles from the aerosol-generating material to form an aerosol. In some embodiments, the aerosol generator is configured to cause an aerosol to be generated from the aerosol-generating material without heating. For example, the aerosol generator may be configured to subject the aerosol-generating material to one or more of vibration, increased pressure, or electrostatic energy.
- Aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way. Aerosol-generating material may, for example, be in the form of a solid, liquid or gel which may or may not contain an active substance and/or flavorants. In some embodiments, the aerosol-generating material may comprise an “amorphous solid”, which may alternatively be referred to as a “monolithic solid” (i.e. non-fibrous). In some embodiments, the amorphous solid may be a dried gel. The amorphous solid is a solid material that may retain some fluid, such as liquid, within it. In some embodiments, the aerosol-generating material may for example comprise from about 50 wt %, 60 wt % or 70 wt % of amorphous solid, to about 90 wt %, 95 wt % or 100 wt % of amorphous solid.
- The aerosol-generating material may comprise one or more active substances and/or flavours, one or more aerosol-former materials, and optionally one or more other functional material.
- The aerosol-former material may comprise one or more constituents capable of forming an aerosol. In some embodiments, the aerosol-former material may comprise one or more of glycerine, glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.
- The one or more other functional materials may comprise one or more of pH regulators, colouring agents, preservatives, binders, fillers, stabilizers, and/or antioxidants.
- The material may be present on or in a support, to form a substrate. The support may, for example, be or comprise paper, card, paperboard, cardboard, reconstituted material, a plastics material, a ceramic material, a composite material, glass, a metal, or a metal alloy. In some embodiments, the support comprises a susceptor. In some embodiments, the susceptor is embedded within the material. In some alternative embodiments, the susceptor is on one or either side of the material.
- An aerosol-modifying agent is a substance, typically located downstream of the aerosol generation area, that is configured to modify the aerosol generated, for example by changing the taste, flavour, acidity or another characteristic of the aerosol. The aerosol-modifying agent may be provided in an aerosol-modifying agent release component that is operable to selectively release the aerosol-modifying agent.
- The aerosol-modifying agent may, for example, be an additive or a sorbent. The aerosol-modifying agent may, for example, comprise one or more of a flavorant, a colourant, water, and a carbon adsorbent. The aerosol-modifying agent may, for example, be a solid, a liquid, or a gel. The aerosol-modifying agent may be in powder, thread or granule form. The aerosol-modifying agent may be free from filtration material.
- A susceptor is a material that is heatable by penetration with a varying magnetic field, such as an alternating magnetic field. The susceptor may be an electrically-conductive material, so that penetration thereof with a varying magnetic field causes induction heating of the heating material. The heating material may be magnetic material, so that penetration thereof with a varying magnetic field causes magnetic hysteresis heating of the heating material. The susceptor may be both electrically-conductive and magnetic, so that the susceptor is heatable by both heating mechanisms. The device that is configured to generate the varying magnetic field is referred to as a magnetic field generator, herein.
- Induction heating is a process in which an electrically-conductive object is heated by penetrating the object with a varying magnetic field. The process is described by Faraday's law of induction and Ohm's law. An induction heater may comprise an electromagnet and a device for passing a varying electrical current, such as an alternating current, through the electromagnet. When the electromagnet and the object to be heated are suitably relatively positioned so that the resultant varying magnetic field produced by the electromagnet penetrates the object, one or more eddy currents are generated inside the object. The object has a resistance to the flow of electrical currents. Therefore, when such eddy currents are generated in the object, their flow against the electrical resistance of the object causes the object to be heated. This process is called Joule, ohmic, or resistive heating. An object that is capable of being inductively heated is known as a susceptor.
- In one embodiment, the susceptor is in the form of a closed circuit. It has been found that, when the susceptor is in the form of a closed circuit, magnetic coupling between the susceptor and the electromagnet in use is enhanced, which results in greater or improved Joule heating.
- Magnetic hysteresis heating is a process in which an object made of a magnetic material is heated by penetrating the object with a varying magnetic field. A magnetic material can be considered to comprise many atomic-scale magnets, or magnetic dipoles. When a magnetic field penetrates such material, the magnetic dipoles align with the magnetic field. Therefore, when a varying magnetic field, such as an alternating magnetic field, for example as produced by an electromagnet, penetrates the magnetic material, the orientation of the magnetic dipoles changes with the varying applied magnetic field. Such magnetic dipole reorientation causes heat to be generated in the magnetic material.
- When an object is both electrically-conductive and magnetic, penetrating the object with a varying magnetic field can cause both Joule heating and magnetic hysteresis heating in the object. Moreover, the use of magnetic material can strengthen the magnetic field, which can intensify the Joule heating.
- In each of the above processes, as heat is generated inside the object itself, rather than by an external heat source by heat conduction, a rapid temperature rise in the object and more uniform heat distribution can be achieved, particularly through selection of suitable object material and geometry, and suitable varying magnetic field magnitude and orientation relative to the object. Moreover, as induction heating and magnetic hysteresis heating do not require a physical connection to be provided between the source of the varying magnetic field and the object, design freedom and control over the heating profile may be greater, and cost may be lower.
- Articles, for instance those in the shape of rods, are often named according to the product length: “regular” (typically in the range 68-75 mm, e.g. from about 68 mm to about 72 mm), “short” or “mini” (68 mm or less), “king-size” (typically in the range 75-91 mm, e.g. from about 79 mm to about 88 mm), “long” or “super-king” (typically in the range 91-105 mm, e.g. from about 94 mm to about 101 mm) and “ultra-long” (typically in the range from about 110 mm to about 121 mm).
- They are also named according to the product circumference: “regular” (about 23-25 mm), “wide” (greater than 25 mm), “slim” (about 22-23 mm), “demi-slim” (about 19-22 mm), “super-slim” (about 16-19 mm), and “micro-slim” (less than about 16 mm).
- Accordingly, an article in a king-size, super-slim format will, for example, have a length of about 83 mm and a circumference of about 17 mm.
- Each format may be produced with mouthpieces of different lengths. The mouthpiece length will be from about 30 mm to 50 mm. A tipping paper connects the mouthpiece to the aerosol generating material and will usually have a greater length than the mouthpiece, for example from 3 to 10 mm longer, such that the tipping paper covers the mouthpiece and overlaps the aerosol generating material, for instance in the form of a rod of substrate material, to connect the mouthpiece to the rod.
- Articles and their aerosol generating materials and mouthpieces described herein can be made in, but are not limited to, any of the above formats.
- The terms ‘upstream’ and ‘downstream’ used herein are relative terms defined in relation to the direction of mainstream aerosol drawn though an article or device in use.
- The filamentary tow or filter material described herein can comprise cellulose acetate fibre tow. The filamentary tow can also be formed using other materials used to form fibres, such as polyvinyl alcohol (PVOH), polylactic acid (PLA), polycaprolactone (PCL), poly(1-4 butanediol succinate) (PBS), poly(butylene adipate-co-terephthalate)(PBAT), starch based materials, cotton, aliphatic polyester materials and polysaccharide polymers or a combination thereof. The filamentary tow may be plasticised with a suitable plasticiser for the tow, such as triacetin where the material is cellulose acetate tow, or the tow may be non-plasticised. The tow can have any suitable specification, such as fibres having a cross section which is ‘Y’ shaped, ‘X’ shaped or ‘O’ shaped. The fibres of the tow may have filamentary denier values between 2.5 and 15 denier per filament, for example between 8.0 and 11.0 denier per filament and total denier values of 5,000 to 50,000, for example between 10,000 and 40,000. When viewed in cross section, the fibres may have an isoperimetric ratio L2/A of 25 or less, preferably 20 or less, and more preferably 15 or less, where L is the length of the perimeter of the cross section and A is the area of the cross section. Filter material described herein also includes cellulose-based materials such as paper. Such materials may have a relatively low density, such as between about 0.1 and about 0.45 grams per cubic centimetre, to allow air and/or aerosol to pass through the material. Although described as filter materials, such materials may have a primary purpose, such as increasing the resistance to draw of a component, that is not related to filtration as such.
- As used herein, the term “tobacco material” refers to any material comprising tobacco or derivatives or substitutes thereof. The term “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.
- In the tobacco material described herein, the tobacco material contains an aerosol forming material. In this context, an “aerosol forming material” is an agent that promotes the generation of an aerosol. An aerosol forming material 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. In some embodiments, an aerosol forming material may improve the delivery of flavour from the aerosol generating material. In general, any suitable aerosol forming material or agents may be included in the aerosol generating material of the invention, including those described herein. Other suitable aerosol forming materials 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. In some embodiments, the aerosol forming material may be glycerol, propylene glycol, or a mixture of glycerol and propylene glycol. The total amount of glycerol, propylene glycol, or a mixture of glycerol and propylene glycol used may be in the range of between 10% and 30%, for instance between 15% and 25% of the tobacco material measured on a dry weight basis. Glycerol may be 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, may be present in an amount of from 0.1 to 0.3% by weight of the composition.
- In some embodiments, 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 B12 or C, melatonin, cannabinoids, or constituents, derivatives, or combinations thereof. The active substance may comprise one or more constituents, derivatives or extracts of tobacco, cannabis or another botanical.
- In some embodiments, the active substance comprises nicotine. In some embodiments, the active substance comprises caffeine, melatonin or vitamin B12.
- As noted herein, the active substance may comprise or be derived from one or more botanicals or constituents, derivatives or extracts thereof. As used herein, the term “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. Alternatively, 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 balm, lemon basil, chive, carvi, verbena, tarragon, geranium, mulberry, ginseng, theanine, theacrine, maca, ashwagandha, damiana, guarana, chlorophyll, baobab or any combination thereof. The mint may be 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, Mentha longifolia, Mentha suaveolens variegata, Mentha pulegium, Mentha spicata c.v. and Mentha suaveolens.
- In some embodiments, the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is tobacco.
- In some embodiments, 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.
- In some embodiments, the active substance comprises or derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from rooibos and fennel.
- In some embodiments, the substance to be delivered comprises a flavour.
- As used herein, the terms “flavour” and “flavorant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers. They may include naturally occurring flavour materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice (liquorice), hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch, whiskey, gin, tequila, rum, spearmint, peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, khat, naswar, betel, shisha, pine, honey essence, rose oil, vanilla, lemon oil, orange oil, orange blossom, cherry blossom, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, wasabi, piment, ginger, coriander, coffee, hemp, a mint oil from any species of the genus Mentha, Eucalyptus, star anise, cocoa, lemongrass, rooibos, flax, Ginkgo Biloba, hazel, hibiscus, laurel, mate, orange skin, rose, tea such as green tea or black tea, thyme, juniper, elderflower, basil, bay leaves, cumin, oregano, paprika, rosemary, saffron, lemon peel, mint, beefsteak plant, Curcuma, cilantro, myrtle, cassis, valerian, pimento, mace, damien, marjoram, olive, lemon balm, lemon basil, chive, Carvi, verbena, tarragon, limonene, thymol, camphene), flavour enhancers, bitterness receptor site blockers, sensorial receptor site activators or stimulators, sugars and/or sugar substitutes (e.g., sucralose, acesulfame potassium, aspartame, saccharine, cyclamates, lactose, sucrose, glucose, fructose, sorbitol, or mannitol), and other additives such as charcoal, chlorophyll, minerals, botanicals, or breath freshening agents. They may be imitation, synthetic or natural ingredients or blends thereof. They may be in any suitable form, for example, liquid such as an oil, solid such as a powder, or gas.
- In some embodiments, the flavour comprises menthol, spearmint and/or peppermint. In some embodiments, the flavour comprises flavour components of cucumber, blueberry, citrus fruits and/or redberry. In some embodiments, the flavour comprises eugenol. In some embodiments, the flavour comprises flavour components extracted from tobacco. In some embodiments, the flavour comprises flavour components extracted from Cannabis.
- In some embodiments, 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.
- In the figures described herein, like reference numerals are used to illustrate equivalent features, articles or components.
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FIG. 1 illustrates anarticle 1 for use as or as part of a non-combustible aerosol provision system. Thearticle 1 may be a non-combustible aerosol provision system itself, or alternatively, may be for use with a non-combustible aerosol provision device to form a non-combustible aerosol provision system. One suitable non-combustibleaerosol provision device 100 comprising aheater 101 is illustrated inFIGS. 6 to 10B . In other examples, other non-combustible aerosol provision devices may be used. Thearticle 1 and other articles described herein can be tobacco heated product consumables. - The
article 1 comprises: a rod ofaerosol generating material 2 comprising at least one aerosol forming material; and amouth end section 20 disposed downstream of theaerosol generating material 2. Themouth end section 20 comprises a hollowtubular body 3, the hollow tubular body having a wall thickness greater than about 0.5 mm and acylindrical body 21 disposed immediately downstream of the hollowtubular body 3. Thearticle 1 is configured such that the distance ‘d’ between the downstream end of the aerosol-generatingmaterial 2 and the upstream end of thecylindrical body 21 is less than about 22 mm. - In the present case, the article further comprises a
hollow tubular member 5 disposed immediately upstream of the hollowtubular body 3. Thehollow tubular member 5 is disposed between theaerosol generating material 2 and the hollowtubular body 3. The hollowtubular body 3 and hollowtubular member 5 are also referred to herein as cooling sections. - The combined length of the
hollow tubular member 5 and the hollowtubular body 3 is such that thecylindrical body 21 is spaced away from the aerosol generating material by a maximum distance d. In the present example, the hollow tubular member has a length of 12 mm, and the hollow tubular body has a length of 9 mm. Thecylindrical body 21 is therefore separated from the aerosol generating material by a distance of 21 mm. Preferably, the maximum distance d is 22 mm. Suitably, the distance d may be 21 mm. It has been surprisingly found that by providing a cooling section comprised of ahollow tubular member 5 and a hollowtubular body 3, configured to extend a maximum of 22 mm from the aerosol generating material, an improved aerosol may be provided. It is hypothesised that limiting the combined length of the cooling sections to less than 22 mm may reduce the condensation of desirable components of the aerosol on the inner surfaces of the cooling sections. For example, thehollow tubular member 5 may have a length of 11 mm and the hollowtubular body 3 may have a length of 10 mm. Thehollow tubular member 5 may have a length from about 6 mm to about 15 mm, more preferably from about 8 mm to about 12 mm and/or the hollowtubular body 3 may have a length from about 6 mm to about 15 mm, more preferably from about 8 mm to about 12 mm. - In addition, it has surprisingly been found that the use of hollow
tubular body 3 immediately upstream ofcylindrical body 21 can further reduce the condensation of desirable components of the aerosol in thecylindrical body 21. Without wising to be bound by theory, it is hypothesised that this is due to hollowtubular body 3 channeling aerosol through the centre of thecylindrical body 21 at an increased flow rate. In addition, by increasing the proportion of the aerosol channeled through the centre of thecylindrical body 21, the cross sectional area of the cylindrical body through which aerosol passes is effectively reduced, further reducing the potential condensation of desirable components of the aerosol in thecylindrical body 21. - Preferably, the
hollow tubular member 5 has a wall thickness of at least 300 microns and/or a permeability of at least 100 Coresta units. By constructing thehollow tubular member 5 to have a permeability of at least 100 Coresta units, the hollow tubular member takes up moisture from aerosol generated by theaerosol generating material 2 when thearticle 1 is heated by the non-combustibleaerosol provision device 100. Furthermore, papers with permeability greater than 100 Coresta units are generally low weight and easier to work with during manufacturing. - The
hollow tubular member 5 is configured to have a larger internal diameter, for instance a smaller wall thickness, than the wall thickness of the hollowtubular body 3. - In the present example the
hollow tubular member 5 is formed from paper. Specifically, thehollow tubular member 5 is formed from a plurality of layers of paper which are parallel wound, with butted seams, to form thetubular member 5, which underlies awrapper 6. The paper tube provides additional rigidity to thefirst cavity 5 a. In the present example, first and second paper layers are provided in a two-ply tube, although in other examples 3, 4 or more paper layers can be used forming 3, 4 or more ply tubes. Other constructions can be used, such as spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mâché type process, moulded or extruded plastic tubes or similar. - The
hollow tubular member 5 can also be formed using a stiff plug wrap and/or tipping paper, for instance as thewrapper 6 and/orfurther wrapper 6′ described in more detail below, meaning that a separate tubular element is not required. The stiff plug wrap and/or tipping paper is manufactured to have a rigidity that is sufficient to withstand the axial compressive forces and bending moments that might arise during manufacture and whilst thearticle 1 is in use. For instance, the stiff plug wrap and/or tipping paper can have a basis weight between 70 gsm and 120 gsm, more preferably between 80 gsm and 110 gsm. Additionally or alternatively, the stiff plug wrap and/or tipping paper can have a thickness between 80 μm and 200 μm, more preferably between 100 μm and 160 μm, or from 120 μm to 150 μm. It can be desirable for both thewrapper 6 and/orfurther wrapper 6′ to have values in these ranges, to achieve an acceptable overall level of rigidity for thehollow tubular member 5. - In other examples, the
hollow tubular member 5 may be formed from other materials, such as a moulded or extruded plastic tube, or a fibrous material as described for hollowtubular body 3. - The
hollow tubular member 5 preferably has a wall thickness, which can be measured, for example using a calliper, of at least about 100 μm and up to about 1.5 mm, preferably between 100 μm and 1 mm and more preferably between 150 μm and 500 μm, or about 300 μm. In the present example, thehollow tubular member 5 has a wall thickness of about 250 μm. - Preferably, the length of the
hollow tubular member 5 is less than about 20 mm. More preferably, the length of thehollow tubular member 5 is less than about 18 mm. Still more preferably, the length of thehollow tubular member 5 is less than about 15 mm. In addition, or as an alternative, the length of thehollow tubular member 5 is preferably at least about 5 mm. Preferably, the length of thehollow tubular member 5 is at least about 6 mm. In some preferred embodiments, the length of thehollow tubular member 5 is from about 10 mm to about 14 mm, more preferably from about 11 mm to about 13 mm, most preferably about 12 mm. In the present example, the length of thehollow tubular member 5 is 12 mm. - The hollow
tubular body 3 is configured to serve as a heat dissipater to reduce the phenomena of ‘hot puff’. ‘Hot puff’ is defined as aerosol delivered to the user at an uncomfortably high temperature. Hot puff may be exacerbated when a user draws aerosol through aheated article 1 at a high rate, reducing the time for heat in the aerosol to be dissipated. When inserted into a non-combustibleaerosol provision device 100, the hollowtubular body 3 separates the mouth end section from theheater 101 to provide space for heat to dissipate before the aerosol reaches the downstream end of the article. Further, it shall be appreciated that heat will be conducted away from the aerosol and into the hollowtubular body 3 as the aerosol is drawn therethrough. In this way, the hollowtubular body 3 acts as a heat sink. - In the present example, hollow
tubular body 3 is formed from filamentary tow. In other embodiments, other constructions may be used, such as spirally wound layers of paper, cardboard tubes, tubes formed using a papier-mâché type process, tubes formed from paper filter material, moulded or extruded plastic tubes or similar. - The hollow
tubular body 3 preferably has a wall thickness of at least about 325 μm and up to about 2 mm, preferably between 500 μm and 2 mm and more preferably between 750 μm and 1.5 mm. In the present example, the hollowtubular body 3 has a wall thickness of about 1.4 mm. The “wall thickness” of the hollowtubular body 3 corresponds to the thickness of the wall of the hollowtubular body 3 in a radial direction. This may be measured, for example, using a caliper. The use of filamentary tow and/or wall thicknesses in these ranges have advantage of insulating the hot aerosol passing through the second cavity 3 a from the outer surface of the hollowtubular body 3. - The wall thickness together with the external diameter of the hollow
tubular body 3 together define the internal diameter or cavity size of the hollowtubular body 3. - In some embodiments, the thickness of the wall of the hollow
tubular body 3 is at least 325 microns and, preferably, at least 400, 500, 600, 700, 800, 900 or 1000 microns. In some embodiments, the thickness of the wall of the hollowtubular body 3 is at least 1250 or 1500 microns. - In some embodiments, the thickness of the wall of the hollow
tubular body 3 is less than 2000 microns and, for instance, less than 1500 microns. - The increased thickness of the wall of the hollow
tubular body 3 means that it has a greater thermal mass, which has been found to help reduce the temperature of the aerosol passing through the hollowtubular body 3 and reduce the surface temperature of themouth end section 20 at locations downstream of the hollowtubular body 3. This is thought to be because the greater thermal mass of the hollowtubular body 3 allows the hollowtubular body 3 to absorb more heat from the aerosol in comparison to a hollowtubular body 3 with a thinner wall thickness. The increased thickness of the hollowtubular body 3 also channels the aerosol centrally through themouth end section 20 such that less heat from the aerosol is transferred to the outer portions of themouth end section 20. - Preferably, the density of the hollow
tubular body 3 is at least about 0.25 grams per cubic centimetre (g/cc), more preferably at least about 0.3 g/cc. Preferably, the density of the hollowtubular body 3 is less than about 0.75 grams per cubic centimetre (g/cc), more preferably less than 0.6 g/cc. In some embodiments, the density of the hollowtubular body 3 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. These densities have been found to provide a good balance between improved firmness afforded by denser material and the lower heat transfer properties of lower density material. For the purposes of the present example, the “density” of the hollowtubular body 3 refers to the density of the filamentary tow forming the element with any plasticiser incorporated. For the purposes of the present invention, the “density” of the material forming the hollowtubular body 3 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 hollowtubular body 3 by the total volume of the material forming the hollowtubular body 3, wherein the total volume can be calculated using appropriate measurements of the material forming the hollowtubular body 3 taken, for example, using callipers. Where necessary, the appropriate dimensions may be measured using a microscope. - The filamentary tow forming the hollow
tubular body 3 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 13 which is not too dense. Preferably, the total denier is at least 20,000, more preferably at least 25,000. In preferred embodiments, the filamentary tow forming the hollowtubular body 3 has a total denier between 25,000 and 45,000, more preferably between 35,000 and 45,000. Preferably the cross-sectional shape of the filaments of tow are ‘Y’ shaped, although in other embodiments other shapes such as ‘X’ shaped filaments can be used. - The filamentary tow forming the hollow
tubular body 3 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 13 which is not too dense. Preferably, the denier per filament is at least 4, more preferably at least 5. In preferred embodiments, the filamentary tow forming the hollowtubular body 3 has a denier per filament between 4 and 10, more preferably between 4 and 9. In one example, the filamentary tow forming the hollowtubular body 3 has an 8Y40,000 tow formed from cellulose acetate and comprising 18% plasticiser, for instance triacetin. - The hollow
tubular body 3 preferably comprises from 10% to 22% by weight of plasticiser. For cellulose acetate tow, the plasticiser is preferably triacetin, although other plasticisers such as polyethelyne glycol (PEG) can be used. The hollowtubular body 3 can comprise less than about 18% by weight of plasticiser, such as triacetin, or less than about 17%, less than about 16% or less than about 15%. More preferably, thetubular body 3 comprises from 10% to 20% by weight of plasticiser, for instance about 11%, about 12%, about 13%, about 15%, about 17%, about 18% or about 19% plasticiser. - In some embodiments, the permeability of the material of the wall of the hollow
tubular body 3 is at least 100 Coresta Units and, preferably, at least 500 or 1000 Coresta Units. - It has been found that the relatively high permeability of the hollow
tubular body 3 increases the amount of heat that is transferred to the hollowtubular body 3 from the aerosol and thus reduces the temperature of the aerosol. The permeability of the hollowtubular body 3 has also been found to increase the amount of moisture that is transferred from the aerosol to the hollowtubular body 3, which has been found to improve the feel of the aerosol in the user's mouth. A high permeability of hollowtubular body 3 also makes it easier to cut ventilation holes into the hollowtubular body 3 using a laser, meaning that a lower power of laser can be used. - The hollow
tubular body 3 may comprise a filamentary tow comprising filaments having a cross-section with an isoperimetric ratio L2/A of 25 or less, 20 or less or 15 or less, where L is the length of the perimeter of the cross section and A is the area of the cross section. In other words, the filaments may comprise a substantially ‘0’ shaped cross section, or at least as close as it is possible to achieve. For a given denier per filament, filaments with a substantially ‘0’ shaped cross section have a lower surface area than other cross sectional shapes, such as ‘Y’ or ‘X’ shaped filaments. Therefore, the delivery of aerosol to the user is improved. - It shall be appreciated that aerosol drawn through the hollow
tubular body 3 passes through both a central second cavity 3 a in the hollowtubular body 3 and also partly through the filaments of the hollowtubular body 3 itself. By providing filaments with a substantially ‘o’ shaped cross section, a greater proportion of aerosol will pass through the filament of the hollowtubular body 3 itself, increasing heat transfer to the hollowtubular body 3 yet further. - In the present example, hollow
tubular body 3 has a length of 9 mm. In other examples, hollow tubular body may have a length up to about 12 mm, forinstance 10 mm. - The hollow
tubular body 3 and hollowtubular member 5 are also referred to as cooling sections, and define respective first andsecond cavities 5 a, 3 a. - The
hollow tubular member 5 and hollowtubular body 3 are each located around and define respective air gaps within themouthpiece 20 which act as cooling segments. The air gaps provide chambers through which heated volatilised components generated by theaerosol generating material 2 flow. - Preferably, the
first cavity 5 a has an internal volume greater than about 300 mm3 and/or the second cavity 3 a has an internal volume greater than about 100 mm3. For instance, thefirst cavity 5 a may have an internal volume of about 310 mm3 or about 330 mm3, and the second cavity 3 a may have an internal volume of about 120 mm3. Providing cavities of at least these volumes has been found to enable the formation of an improved aerosol, as well as providing the cooling function described herein. Such cavity sizes provide sufficient space within themouthpiece 20 to allow heated volatilised components to cool, therefore allowing the exposure of theaerosol generating material 2 to higher temperatures than would otherwise be possible, since they may result in an aerosol which is too warm. - Surprisingly, the relative internal diameters and length of the first and second cavities has been found to be important for improving the quality of the aerosol. It has been advantageously found that providing a
tubular member 5 having a length less than 18 mm, or less than the length of theaerosol generating material 2, reduces the likelihood of desirable components of the aerosol condensing on the inner surface of thetubular member 5. It has also been surprisingly found that providing a hollowtubular body 3, having a smaller inner diameter than hollowtubular member 5, immediately downstream of thehollow tubular member 5 provides a further improvement in the aerosol by channeling the hot aerosol through the centre of thehollow tubular member 5, further reducing condensation on the inner surface of the tubular member. - The inner diameters of each of the hollow
tubular body 3 and thehollow tubular member 5 may be selected from a range of about 2 mm to about 6 mm, about 2 mm to about 5 mm, about 2.5 mm to about 4.5 mm and about 3.0 mm to about 4 mm. The inner diameter of thetubular body 3 is selected to be smaller than the inner diameter of thetubular member 5. - The second cavity can, for instance, have an internal volume greater than 75 mm3, for instance greater than 90 mm3, 100 mm3, 140 mm3, or 150 mm3, allowing further improvement of the aerosol. In some examples, the second cavity 3 a comprises a volume of between about 130 mm3 and about 180 mm3, for instance about 150 mm3.
- The first cavity can, for instance, have an internal volume greater than 100 mm3, for instance greater than 200 mm3, 300 mm3, 350 cm3, 400 mm3, or 500 mm3, allowing further improvement of the aerosol. In some examples, the
first cavity 5 a comprises a volume of between about 300 mm3 and about 400 mm3, or between about 340 mm3 and about 360 mm3 for instance about 350 mm3. - The
hollow tubular member 5 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 thehollow tubular member 5 and a heated volatilised component exiting a second, downstream end of thehollow tubular member 5. Thehollow tubular member 5 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 100 degrees Celsius between a heated volatilised component entering a first, upstream end of thehollow tubular member 5 and a heated volatilised component exiting a second, downstream end of thehollow tubular member 5. This temperature differential across the length of thehollow tubular member 5 protects the temperature sensitive second body ofmaterial 5 from the high temperatures of theaerosol generating material 3 when it is heated. - The hollow
tubular body 3 can be configured to provide a temperature differential of at least 5 degrees Celsius between a heated volatilised component entering a first, upstream end of the hollowtubular body 3 and a heated volatilised component exiting a second, downstream end of the hollowtubular body 3. The hollowtubular body 3 is preferably configured to provide a temperature differential of at least 10 degrees Celsius, preferably at least 12 degrees Celsius and more preferably at least 15 degrees Celsius between a heated volatilised component entering a first, upstream end of the hollowtubular body 3 and a heated volatilised component exiting a second, downstream end of the hollowtubular body 3. - In each embodiment, the article further comprises the
wrapper 6 at least partially surrounding theaerosol generating material 2 and thehollow tubular member 5 to connect theaerosol generating material 2 to thehollow tubular member 5. In some examples the wrapper may extend along the full length of thearticle 1 to attach theaerosol generating material 2 to the components of themouth end section 20. In the present example, afurther wrapper 6′ underlies thewrapper 6, and extends along themouth end section 20.Further wrapper 6′ combines thehollow tubular member 5, thetubular body 3,cylindrical body 21, and secondtubular body 22. In the present example,wrapper 6 extends partially along the length of theaerosol generating material 2 to attach the aerosol generating material to the wrappedmouth end section 20. - A
plug wrap 23 circumscribes thecylindrical body 21.Further wrapper 6′ circumscribes and attaches the secondtubular body 22 to the body ofmaterial 21, the hollowtubular body 3, and thehollow tubular member 5. The wrapped secondtubular body 22,cylindrical body 21, hollowtubular body 3 and hollowtubular member 5 are attached to theaerosol generating material 2 bywrapper 6. - The
wrapper 6 may be a paper material comprising a citrate, such as sodium nitrate or potassium nitrate. In such examples, thewrapper 6 may have a citrate content of 2% by weight or less, or 1% by weight or less. This reduces charring of thewrapper 6 when thearticle 1 is heated in the non-combustibleaerosol provision device 100. - In some embodiments, the
aerosol generating material 2 described herein is a firstaerosol generating material 2 and the hollowtubular body 3 may comprise a second aerosol generating material. For example, the second aerosol generating material may be disposed on an inner surface of the hollowtubular body 3. - The second aerosol generating material comprises at least one aerosol former material, and may also comprise at least one aerosol modifying agent, or other sensate material. The aerosol former material and/or aerosol modifying agent can be any aerosol former material or aerosol modifying agent as described herein, or a combination thereof.
- In use, as the aerosol generated from the first
aerosol generating material 2 is drawn through the hollowtubular body 3, heat from the first aerosol may aerosolise the aerosol forming material of the second aerosol generating material, to form a second aerosol. The second aerosol may comprise a flavorant, which may be additional or complementary to the flavour of the first aerosol. - Providing a second aerosol generating material on the second hollow
tubular body 3 can result in generation of a second aerosol which boosts or complements the flavour or visual appearance of the first aerosol. - The
article 1 may further comprise at least oneventilation area 12 arranged to allow external air to flow into the article. In the illustrated embodiments, theventilation area 12 comprises a row of ventilation apertures, or perforations, cut into thewrapper 6. The ventilation apertures may extend in a line around the circumference of thearticle 1. Theventilation area 12 may comprise two or more rows of ventilation apertures. By providing aventilation area 12, ambient air may be drawn into the article during use to further cool the aerosol. - In the illustrated embodiments, the at least one
ventilation area 12 is arranged to provide external air into the second cavity 3 a of the hollowtubular body 3. To achieve this, the one or more rows of ventilation apertures extend around the circumference of the article over the hollowtubular body 3. - Suitably, the
ventilation area 12 may be provided at a position between 12 mm and 20 mm downstream of theaerosol generating material 2. For instance, the ventilation area may be provided at a position about 14.5 mm or 18.5 mm downstream of theaerosol generating material 2 or at a position between 14 mm and 20 mm downstream of theaerosol generating material 2. In other examples, ventilation may be provided at a position 22.5 mm upstream of the mouth end of the article. Alternatively/additionally, the ventilation may be provided at a position less than 3.5 mm from the downstream end of the hollow tubular member. For instance, the ventilation area may be provided at a position about 14.5 mm or 18.5 mm downstream of theaerosol generating material 2. In other examples, ventilation may be provided at a position 22.5 mm upstream of the mouth end of the article. - In one example, the
ventilation area 12 comprises a single row of perforations formed as laser perforations. In some other examples, the ventilation area comprises first and second parallel rows of perforations formed as laser perforations, for instance at positions 17.925 mm and 18.625 mm respectively from the mouth end. These perforations pass though thewrapper 6 and hollowtubular body 3. In alternative embodiments, the ventilation can be provided at other locations. - In some examples, the perforations pass through the full thickness of the wall of the hollow
tubular body 3. In other examples, the ventilations may be formed through only a portion of the wall thickness of the tubular body. For example, the ventilation perforation may extend into the tubular body by a depth of up to about 0.2 mm, or up to about 0.3 mm, or up to about 0.5 mm, or up to about 1 mm, or up to about 1.5 mm. - Alternatively, the ventilation can be provided via a single row of perforations, for instance laser perforations, into the portion of the
article 1 in which the hollowtubular body 3 is located. This has been found to result in improved aerosol formation, which is thought to result from the airflow through the perforations being more uniform than with multiple rows of perforations, for a given ventilation level. In the present example, theventilation area 12 comprises a single row of laser perforations 18.5 mm downstream of theaerosol generating material 2. - In another embodiment, the at least one
ventilation area 12 is arranged to provide external air into theaerosol generating material 2. To achieve this, the one or more rows of ventilation apertures extend around the circumference of the article over the rod ofaerosol generating material 2. - The level of ventilation provided by the at least one
ventilation area 12 is within the range of 40% to 70% of the volume of aerosol generated by theaerosol generating material 2 passing through thearticle 1, when thearticle 1 is heated in the non-combustibleaerosol provision device 100. - Aerosol temperature has been found to generally increase with a drop in the ventilation level. However the relationship between aerosol temperature and ventilation level does not appear to be linear, with variations in ventilation, for instance due to manufacturing tolerances, having less impact at lower target ventilation levels. For instance, with a ventilation tolerance of ±15%, for a target ventilation level of 75%, the aerosol temperature could increase by approximately 6° C. at the lower ventilation limit (60% ventilation). However, with a target ventilation level of 60% the aerosol temperature may only increase by approximately 3.5° C. at the lower vent limit (45% ventilation). The target ventilation level of the article can therefore be within the range 40% to 70%, for instance, 45% to 65%. The mean ventilation level of at least 20 articles can be between 40% and 70%, for instance between 45% and 70% or between 51% and 59%.
- In some embodiments, an
additional wrapper 10 at least partially surrounds theaerosol generating material 2, between theaerosol generating material 2 and thewrapper 6. In particular, during manufacture of the article, the aerosol generating material is first wrapped byadditional wrapper 10 before being attached in combination with the other components of thearticle 1 bywrapper 6. - In some embodiments, the
additional wrapper 10 surrounding the aerosol generating material has a high level of permeability, for example greater than about 1000 Coresta Units, or greater than about 1500 Coresta Units, or greater than about 2000 Coresta Units. The permeability of theadditional wrapper 10 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
additional wrapper 10 may be formed from a material with a high inherent level of permeability, an inherently porous material, or may be formed from a material with any level of inherent permeability where the final level of permeability is achieved by providing theadditional wrapper 10 with a permeable zone or area. Providing a permeableadditional wrapper 10 provides a route for air to enter the smoking article. Theadditional wrapper 10 can be provided with a permeability such that the amount of air entering through the rod ofaerosol generating material 2 is relatively more than the amount of air entering thearticle 1 through theventilation area 12 in the mouthpiece. Anarticle 1 having this arrangement may produce a more flavoursome aerosol which may be more satisfactory to the user. - The
mouth end section 20 further comprises a secondtubular body 22. The secondtubular body 22 defines the mouth end of thearticle 1. The secondtubular body 22 may comprise a tube of cellulose acetate stiffened with plasticizer. For example, the second tubular body may be constructed in the same way as described for hollowtubular body 3, and may have a wall thickness and/or density in the range as described for hollowtubular body 3. - The second
tubular body 22 defines acavity 22 a in themouth end section 20 that opens at the mouth end. - The provision of a second
tubular body 22 at the downstream end of thearticle 1 has advantageously been found to significantly reduce the temperature of the outer surface of thearticle 1 at the downstream end of the mouthpiece which comes into contact with a consumer's mouth when thearticle 1 is in use. - The use of the second hollow
tubular body 22 has also been found to significantly reduce the temperature of the outer surface of themouth end section 20 even upstream of the second hollowtubular body 22. Without wishing to be bound by theory, it is hypothesised that this is due to the second hollowtubular body 22 channeling aerosol closer to the centre of themouth end section 20, and therefore reducing the transfer of heat from the aerosol to the outer surface of the article. - The second hollow
tubular body 22 preferably has an internal diameter of greater than 3.0 mm. Smaller diameters than this can result in increasing the velocity of aerosol passing though themouth end section 20 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, thetubular body 22 has an internal diameter of greater than 3.1 mm, and still more preferably greater than 3.5 mm or 3.6 mm. In one embodiment, the internal diameter of thetubular body 22 is about 3.9 mm. - The “wall thickness” of the second hollow
tubular body 22 corresponds to the thickness of the wall of the tube 13 in a radial direction. This may be measured in the same way as for hollow tubular element 8. The wall thickness is advantageously greater than 0.9 mm, and more preferably 1.0 mm or greater. Preferably, the wall thickness is substantially constant around the entire wall of the second hollowtubular element 11. However, where the wall thickness is not substantially constant, the wall thickness is preferably greater than 0.9 mm at any point around the second hollowtubular element 11, more preferably 1.0 mm or greater. - Preferably, the length of the second hollow
tubular body 22 is less than about 20 mm. More preferably, the length of the second hollowtubular body 22 is less than about 15 mm. Still more preferably, the length of the second hollowtubular body 22 is less than about 10 mm. In addition, or as an alternative, the length of the second hollowtubular body 22 is at least about 5 mm. Preferably, the length of the second hollowtubular body 22 is at least about 6 mm. In some preferred embodiments, the length of the second hollowtubular body 22 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 second hollowtubular body 22 is 6 mm. - In the present example, the
article 1 includes a body ofmaterial 21. The body of material is substantially cylindrical, and positioned immediately downstream of the hollowtubular body 3. The body ofmaterial 21 is wrapped in an additional wrapping material, such as afirst plug wrap 23. In some examples, thefirst plug wrap 23 has a basis weight of less than 50 gsm, for instance between about 20 gsm and 40 gsm. For instance, thefirst plug wrap 23 can have a thickness of between 30 μm and 60 μm, or between 35 μm and 45 μm. - In other examples, the
first plug wrap 23 has a basis weight greater than 65 gsm, for instance greater than 80 gsm, or greater than 95 gsm. In some examples, thefirst plug wrap 23 has a basis weight of about 100 gsm. It has advantageously been found that providing a first plug wrap having a basis weight in these ranges and comprising an embossed pattern can reduce the temperature of the external surface of thearticle 1 at a position overlying thecylindrical body 21. For instance,first plug wrap 23 may be provided with an embossed pattern comprising a hexagonal repeating pattern, a linear repeating pattern, or a series of raised areas having any suitable shape. Without wishing to be bound by theory, it is thought that providing an embossedfirst plug wrap 23 can provide an air gap between the plug wrap and theadditional wrapper 10, which can reduce heat transfer to the external surface of thearticle 1. - Preferably, the
first plug wrap 23 is a non-porous plug wrap, for instance having a permeability of less than 100 Coresta units, for instance less than 50 Coresta units. However, in other embodiments, thefirst plug wrap 23 can be a porous plug wrap, for instance having a permeability of greater than 200 Coresta units. - The second
tubular body 22 is separated from the hollowtubular body 3 by the body ofmaterial 21. - Preferably, the length of the body of
material 21 is less than about 15 mm. More preferably, the length of the body ofmaterial 21 is less than about 10 mm. In addition, or as an alternative, the length of the body ofmaterial 21 is at least about 5 mm. Preferably, the length of the body ofmaterial 21 is at least about 6 mm. In some preferred embodiments, the length of the body ofmaterial 21 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 ofmaterial 21 is 10 mm. - The body of
material 21, also referred to ascylindrical body 21, can be formed without any cavities or hollow portions, for instance without cavities or hollow portions having a dimension greater than 0.5 mm therein. For instance, the cylindrical body of material can comprise material which extends substantially continuously throughout its volume. It can, for instance, have a density which is substantially uniform across its diameter and/or along its length. - In the present example, the body of
material 21 is formed from filamentary tow. In the present example, the tow used in the body ofmaterial 21 has a denier per filament (d.p.f.) of 8.4 and a total denier of 21,000. Alternatively, the tow can, for instance, have a denier per filament (d.p.f.) of 9.5 and a total denier of 12,000. Alternatively, the tow can, for instance, have a denier per filament (d.p.f.) of 8 and a total denier of 15,000. In the present example, the tow comprises plasticised cellulose acetate tow. The plasticiser used in the tow comprises about 7% by weight of the tow. In the present example, the plasticiser is triacetin. In other examples, different materials can be used to form the body ofmaterial 21. For instance, rather than tow, thebody 21 can be formed from paper, for instance in a similar way to paper filters known for use in cigarettes. Alternatively, thebody 21 can be formed from tows other than cellulose acetate, for instance polylactic acid (PLA), other materials described herein for filamentary tow or similar materials, such as paper filter material. 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, more preferably at least 6 and still more preferably at least 7. These values of denier per filament provide a tow which has relatively coarse, thick fibres with a lower surface area which result in a lower pressure drop across the body ofmaterial 21 than tows having lower d.p.f. values. Preferably, to achieve a sufficiently uniform body ofmaterial 21, 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 21 is preferably at most 30,000, more preferably at most 28,000 and still more preferably at most 25,000. These values of total denier provide a tow which takes up a reduced proportion of the cross sectional area of thearticle 1 which results in a lower pressure drop across thearticle 1 than tows having higher total denier values. For appropriate firmness of the body ofmaterial 21, the tow preferably has a total denier of at least 8,000 and more preferably at least 10,000. Preferably, the denier per filament is between 5 and 12 while the total denier is between 10,000 and 25,000. More preferably, the denier per filament is between 6 and 10 while the total denier is between 11,000 and 22,000. Preferably the cross-sectional shape of the filaments of tow are ‘Y’ shaped, although in other embodiments other shapes such as ‘X’ shaped or ‘O’ shaped filaments can be used, with the same d.p.f. and total denier values as provided herein. The tow may comprise filaments having a cross-section with an isoperimetric ratio of 25 or less, preferably 20 or less, and more preferably 15 or less. In some examples, the body ofmaterial 21 may comprise an adsorbent material (e.g. charcoal) dispersed within the tow. - Irrespective of the material used to form the
body 6, the pressure drop acrossbody 6, can, for instance, be between 0.2 and 5 mmWG per mm of length of thebody 6, for instance between 0.5 mmWG and 3 mmWG per mm of length of thebody 6. The pressure drop can, for instance, be between 0.5 and 2.5 mmWG/mm of length, between 1 and 1.5 mmWG/mm of length or between 1.5 and 2.5 mmWG/mm of length. The total pressure drop acrossbody 6 can, for instance, be between 2 mmWG and 8 mWG, or between 4 mmWG and 7 mmWG. The total pressure drop acrossbody 6 can be about 5, 6 or 7 mmWG. -
FIG. 2 illustrates anarticle 1′ for use as or as part of a non-combustible aerosol provision system.Article 1′ is the same asarticle 1, except thatcylindrical body 21 of themouth end section 20′ comprises acapsule 24. Thecapsule 24 can comprise a breakable capsule, for instance a capsule which has a solid, frangible shell surrounding a liquid payload. In the present example, a single capsule is used. The capsule is entirely embedded within the body ofmaterial 21. In other words, the capsule is completely surrounded by the material forming the body. In other examples, a plurality of breakable capsules may be disposed within the body ofmaterial 21, forinstance material 21 can be increased to accommodate the number of capsules required. In examples where a plurality of capsules is used, the individual capsules may be the same as each other, or may differ from one another in terms of size and/or capsule payload. In other examples, multiple bodies of material may be provided, with each body containing one or more capsules. - The
capsule 24 has a core-shell structure. In other words, thecapsule 24 comprises a shell encapsulating a liquid agent, for instance a flavorant or other agent, which can be any one of the flavorants or aerosol modifying agents described herein. The shell of thecapsule 24 can be ruptured by a user to release the flavorant or other agent into the body ofmaterial 21. Thefirst plug wrap 23 can comprise a barrier coating to make the material of the plug wrap substantially impermeable to the liquid payload of the capsule. Alternatively or in addition, thefurther wrapper 6′ and/or wrappingmaterial 6 can comprise a barrier coating to make the material of thatfurther wrapper 6′ and/or wrappingmaterial 6 substantially impermeable to the liquid payload of the capsule. - In some examples, the capsule is spherical and has a diameter of about 3 mm. In other examples, other shapes and sizes of capsule can be used. The total weight of the capsule may be in the range about 10 mg to about 50 mg.
- It is known to generate, for a given tow specification (such as 8.4Y21000), a tow capability curve which represents the pressure drop through a length of rod formed using the tow, for each of a range of tow weights. Parameters such as the rod length and circumference, wrapper thickness and tow plasticiser level are specified, and these are combined with the tow specification to generate the tow capability curve, which gives an indication of the pressure drop which would be provided by different tow weights between the minimum and maximum weights achievable using standard filter rod forming machinery. Such tow capability curves can be calculated, for instance, using software available from tow suppliers. It has been found that it is particularly advantageous to use a body of
material 21 which includes filamentary tow having a weight per mm of length of the body ofmaterial 21 which is between about 10% and about 30% of the range between the minimum and maximum weights of a tow capability curve generated for the filamentary tow. This can provide an acceptable balance between providing enough tow weight to avoid shrinkage after thebody 21 has been formed, providing an acceptable pressure drop, while also assisting with capsule placement within the tow, for capsules of the sizes described herein. - A control sample and an article according to the claimed invention were tested, as described below, to determine the distribution of nicotine and glycerol, desirable components of the aerosol, throughout the article after use. The pre-use level of glycerol and nicotine in the aerosol generating material was also determined using mass balance analysis, as described below.
- The control sample comprises an aerosol generating material section having a length of 30 mm, a
tubular member 5 arranged immediately downstream of the aerosol generating section, having a length of 17 mm, acylindrical body 21 having a length of 10 mm, and a secondtubular body 22 having a length of 6 mm. Sample A has the same general construction as illustrated in and described with reference toFIG. 1 , and comprises an aerosol generating material section having a length of 30 mm, atubular member 5 arranged immediately downstream of the aerosol generating section and having a length of 8 mm, a firsttubular body 3 having a length of 9 mm, acylindrical body 21 having a length of 10 mm, and a secondtubular body 22 having a length of 6 mm. - Samples for mass balance analysis were taken of the
aerosol generating material 2; the cooling section, which comprises the firsttubular body 3, and where present, thetubular member 5; and a mouth end portion, comprising thecylindrical body 21 and the secondtubular body 22. - The amount of nicotine and glycerol in each of the mouth end section, the cooling section and the aerosol generating section after use of the article can be determined using mass balance analysis. The amount of nicotine and glycerol present in the delivered aerosol can be determined using emissions analysis. Mass balance analysis and emissions analysis are techniques which are known to the person skilled in the art.
-
TABLE 1 Average nicotine content in sections of a control article, and an article according to the present disclosure (sample A). Mean nicotine per component Mouth Aerosol (mg/unit) as percentage of total end Cooling generating pre-use nicotine content Aerosol portion section material Control 27% 34% 25% 14% Sample A 48% 15% 24% 13% % difference between control 78% −56% −4% −7% and sample A -
TABLE 2 Average glycerol content in sections of a control article, and an article according to the present disclosure (sample A). Mean glycerol per component Mouth Aerosol (mg/unit) as percentage of total end Cooling generating pre-use glycerol content Aerosol portion section material Control 13% 23% 25% 39% Sample A 24% 11% 22% 43% % difference between control 85% −52% −12% 10% and sample A - To obtain the data provided in tables 1 and 2 above, mass balance analysis was performed to determine the amount of a given substance (in the examples in tables 1 and 2 herein, nicotine and glycerol respectively), present in a given section of the article after use. Mass balance analysis was also used to determine the amount of nicotine and glycerol present in a given section of the article prior to use, so that both the distribution of the substance in the article and the amount present in the aerosol generated from an article could be compared to the total amount of the substance initially provided.
- As would be evident to the skilled person, where ‘the article’ is referred to in relation to this data and the experimental methods by which the data was obtained, ‘the article’ does not refer to a single specific article, but rather an article having a specific design or configuration, which is therefore comparable to other articles having the same specific design or configuration. A number of such articles will have been analysed to obtain the values presented herein, which represent mean values, as described in further detail below. As would be clear to the skilled person, the same individual article is not tested both before and after use, to obtain the pre and post use data points. Instead, the pre use data will be obtained from a number of articles having a specific design or configuration, and the post use data will be obtained from a separate number of articles having the same specific design or configuration.
- To obtain the samples for mass balance analysis, the article is deconstructed into sections. The number of articles deconstructed to obtain samples is such that the total mass of the samples to be analysed is at least 1 gram. Each sample comprises a number of the relevant components of the deconstructed article (e.g. the aerosol generating
material section 2, or thecylindrical body 21 and second tubular body 22), the number being sufficient that the total mass of the components taken from a number of articles have a combined mass of at least 1 gram. At least three repetitions of mass balance analysis, each repetition performed on a new sample obtained from a new set of articles, should be carried out. The average amount of a substance in mg/unit is then obtained from an average of the at least three repetitions (three repetitions x typically 5 to 8 articles sampled per repetition=15 to 24 articles sampled for each average value obtained). - As described above, mass balance analysis employing the sampling protocol described in the preceding paragraph was performed to determine the pre-use nicotine and glycerol content of the article.
- Emissions analysis can be performed using a standard puffing regime, and a heating device intended for use with the article, to determine the nicotine and glycerol content of the generated aerosol. The puffing regime is according to the ISO intense regime (where this includes a 55 ml puff volume, a 30 s interval between puffs, and a 2 s puff duration), but with any ventilation in the open configuration. Where the device has any ‘boost’ or additional smoking functions, these should not be used for performing the test.
- Following use under the standard puffing regime as described above, samples were then taken from the articles according to the sampling protocol described above, for mass balance analysis to determine the post use distribution of nicotine and glycerol in the article.
- A comparison between the nicotine and glycerol content of the aerosol in the control article and sample A reveals that 78% more nicotine and 85% more glycerol was present in the aerosol produced from sample A. A significantly increased amount of desirable components of the aerosol is therefore available for delivery to a user in articles prepared according to the present disclosure.
- The data presented in tables 1 and 2 above shows less nicotine and glycerol was present in both the mouth end section and the cooling sections after use in sample A, compared to the control articles. As described above, it is hypothesised that this is due to a reduction in condensation of the aerosol on internal surfaces of the tubular bodies and in the material of the cylindrical body.
- A method of manufacturing an article for use with a non-combustible
aerosol provision device 100 comprising aheater 101 will now be described with reference toFIG. 3 . The method comprises: -
- the step S1 of providing an
aerosol generating material 2 comprising at least one aerosol forming material; - the step S2 of disposing a
cylindrical body 21 downstream of the aerosol generating material, such that the upstream end of thecylindrical body 21 is less than about 22 mm from the downstream end of theaerosol generating material 2.
- the step S1 of providing an
-
FIG. 4 illustrates anarticle 1″ for use as or as part of a non-combustible aerosol provision system.Article 1″ includes many of the same features asarticle 1 andarticle 1′, where like reference numerals refer to like features.Article 1″ differs fromarticle 1 in that it does not comprise a hollowtubular body 3. Instead,hollow tubular member 5 defines thecavity 5 a to form the whole length of the cooling section. - Additionally, in the example of
FIG. 4 ,article 1″ differs fromarticle 1 in that it does not comprise a second hollowtubular body 22 downstream of the body ofmaterial 21. Instead, the downstream end of the body ofmaterial 21 forms the downstream end of thearticle 1″. However, the second hollowtubular body 22 may be provided downstream of the body ofmaterial 21 according to some examples. - In the example of
FIG. 4 , the length of the body ofmaterial 21 is approximately 12 mm long. Preferably, the length of the body ofmaterial 21 is less than about 17 mm. In addition, or as an alternative, the length of the body ofmaterial 21 is at least about 8 mm. In some preferred embodiments, the length of the body ofmaterial 21 is from about 8 mm to about 17 mm, more preferably from about 10 mm to about 14 mm, even more preferably from about 11 mm to about 13 mm, most preferably about 11 mm, 12 mm, or 13 mm, 9 mm or 10 mm. In other preferred embodiments, the length of the body of material may be from 15 mm to 17 mm, more preferably about 16 mm. In some examples, at least one further body of material is provided downstream of the aerosol generating material, such as between the aerosol generating material and the body ofmaterial 21. The combined length of the body ofmaterial 21 and the at least one further body of material may have a combined length corresponding to any of the lengths described above with reference to the body ofmaterial 21. - The
article 1″ may comprise a rod ofaerosol generating material 2 having a length of approximately 26 mm. However, the rod ofaerosol generating material 2 may be any suitable length as will be understood by the skilled person. - A distance d′ between the downstream end of the article and the
ventilation area 12 inFIG. 4 is between 12 mm and 21 mm from the downstream end of the article. In some examples, the distance d′ between the downstream end of the article is between 16 mm and 20 mm, or between 18 mm and 19 mm from the downstream end of the article. Preferably, the distance d′ between the downstream end of the article and the ventilation area is approximately 18.5 mm from the downstream end of the article. In other examples, the ventilation area may be provided at approximately 15 mm, 16 mm, 17 mm, or 18 mm from the downstream end of the article. Alternatively or additionally, the ventilation area is preferably provided at 3.5 mm or less from the downstream end of the hollow tubular member. In the present example, the ventilation area is provided at 2.5 mm from the downstream end of the hollow tubular member. - Without wishing to be bound by theory, it is also believed that the aerosol temperature is reduced the closer the ventilation position is provided to the mouth end of the article. Accordingly, improved cooling of aerosol can be achieved by locating the ventilation position closer to the mouth end.
- The ventilation area may be provided in the
wrapper 6 surrounding thehollow tubular member 5, in the same way forarticle 1 ofFIG. 1 . In some examples, the ventilation area is provided as holes or perforations. The holes or perforations may be alternatively or additionally provided in thehollow tubular member 5. - It has been surprisingly found that by locating the
ventilation area 12 closer to the mouth end of the article, the reduction in certain toxicants from the generated aerosol passing through the article and exiting the mouth end is greater than the reduction in those toxicants when a ventilation area is provided closer to the aerosol generating material. - In the example of
FIG. 4 , theventilation area 12 is provided by a double row of perforations disposed at 18.5 mm from the mouth end. The ventilation level in this example is 60%. The reduction in NNK was found to be 91.2% compared to 87.2% for a corresponding article provided with a ventilation area at 22.5 mm from the mouth end of the article. Accordingly, it can be seen that the reduction in NNK is around 4% lower for the article provided with ventilation at 22.5 mm from the mouth end of the article compared toarticle 1″ provided with ventilation at 18.5 mm from the mouth end of the article. - Similarly, the reduction in NNN was found to be 80.6% compared to 55.5% for a corresponding article provided with a ventilation area at 22.5 mm from the mouth end of the article. Accordingly, it can be seen that the reduction in NNN is around 25% lower for the article provided with ventilation at 22.5 mm from the mouth end of the article compared to the
article 1″ provided with ventilation at 18.5 mm from the mouth end of the article. - However, it has also been found that providing ventilation closer to the mouth end results in higher nicotine delivery compared to articles having ventilation provided closer to the aerosol generating material.
- In particular nicotine delivery of an article as illustrated in
FIG. 4 was found to provide nicotine delivery of 0.84 mg/cig compared to 0.71 mg/cig for a corresponding article having a ventilation area of 22.5 mm from the mouth end of the article. - Without wishing to be bound by theory, it is also believed that providing ventilation closer to the mouth end also results in higher delivery of aerosol forming agent (e.g. glycerol) to the user, compared to articles having ventilation provided closer to the aerosol generating material.
- Therefore, it can be seen that an
article 1″ as illustrated inFIG. 4 can provide higher deliveries of nicotine and aerosol while reducing the levels of undesirable toxicants by providing a ventilation area closer to the mouth end of the article. - A method of manufacturing an
article 1″ for use with a non-combustibleaerosol provision device 100 comprising aheater 101 will now be described with reference toFIG. 5 . The method comprises: -
- the step S1 of providing an
aerosol generating material 2 comprising at least one aerosol forming material; - the step S2 of disposing a hollow tubular member downstream of the
aerosol generating material 2; - the step S3 of disposing a substantially cylindrical body downstream of the hollow tubular member, the downstream end of the cylindrical body forming the downstream end of the article, and the distance between the downstream end of the cylindrical body and the downstream end of the hollow tubular member being at least 8 mm; and
- the step S4 of providing at least one ventilation area between 12 mm and 21 mm from the downstream end of the article.
- the step S1 of providing an
- The method may also be performed in conjunction with the method described in relation to
FIG. 3 , such that the cylindrical body is less than about 22 mm from the downstream end of the aerosol generating material. -
FIG. 6 shows an example of a non-combustibleaerosol provision device 100 comprising aheater 101 for generating aerosol from an aerosol generating medium/material such as theaerosol generating material 2 of any of thearticles generic article 110 illustrated inFIGS. 6 to 10B can be considered to correspond to any of thearticles device 100 may be used to heat areplaceable article 110 comprising the aerosol generating medium, for instance thearticle 10 described herein, to generate an aerosol or other inhalable medium which is inhaled by a user of thedevice 100. Thedevice 100 andreplaceable article 110 together form a system. - The
device 100 comprises a housing 102 (in the form of an outer cover) which surrounds and houses various components of thedevice 100. Thedevice 100 has anopening 104 in one end, through which thearticle 110 may be inserted for heating by aheater 101, hereinafter referred to as the heating assembly. In use, thearticle 110 may be fully or partially inserted into the heating assembly where it may be heated by one or more components of the heater assembly. - The
device 100 of this example comprises afirst end member 106 which comprises alid 108 which is moveable relative to thefirst end member 106 to close theopening 104 when noarticle 110 is in place. InFIG. 6 , thelid 108 is shown in an open configuration, however thelid 108 may move into a closed configuration. For example, a user may cause thelid 108 to slide in the direction of arrow “B”. - The
device 100 may also include a user-operable control element 112, such as a button or switch, which operates thedevice 100 when pressed. For example, a user may turn on thedevice 100 by operating theswitch 112. - The
device 100 may also comprise an electrical component, such as a socket/port 114, which can receive a cable to charge a battery of thedevice 100. For example, thesocket 114 may be a charging port, such as a USB charging port. -
FIG. 7 depicts thedevice 100 ofFIG. 6 with theouter cover 102 removed and without anarticle 110 present. Thedevice 100 defines alongitudinal axis 134. - As shown in
FIG. 7 , thefirst end member 106 is arranged at one end of thedevice 100 and asecond end member 116 is arranged at an opposite end of thedevice 100. The first andsecond end members device 100. For example, the bottom surface of thesecond end member 116 at least partially defines a bottom surface of thedevice 100. Edges of theouter cover 102 may also define a portion of the end surfaces. In this example, thelid 108 also defines a portion of a top surface of thedevice 100. - The end of the device closest to the
opening 104 may be known as the proximal end (or mouth end) of thedevice 100 because, in use, it is closest to the mouth of the user. In use, a user inserts anarticle 110 into theopening 104, operates theuser control 112 to begin heating the aerosol generating material and draws on the aerosol generated in the device. This causes the aerosol to flow through thedevice 100 along a flow path towards the proximal end of thedevice 100. - The other end of the device furthest away from the
opening 104 may be known as the distal end of thedevice 100 because, in use, it is the end furthest away from the mouth of the user. As a user draws on the aerosol generated in the device, the aerosol flows away from the distal end of thedevice 100. - The
device 100 further comprises apower source 118. Thepower source 118 may be, for example, a battery, such as a rechargeable battery or a non-rechargeable battery. Examples of 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 heating assembly to supply electrical power when required and under control of a controller (not shown) to heat the aerosol generating material. In this example, the battery is connected to acentral support 120 which holds thebattery 118 in place. - The device further comprises at least one
electronics module 122. Theelectronics module 122 may comprise, for example, a printed circuit board (PCB). ThePCB 122 may support at least one controller, such as a processor, and memory. ThePCB 122 may also comprise one or more electrical tracks to electrically connect together various electronic components of thedevice 100. For example, the battery terminals may be electrically connected to thePCB 122 so that power can be distributed throughout thedevice 100. Thesocket 114 may also be electrically coupled to the battery via the electrical tracks. - In the
example device 100, the heating assembly is an inductive heating assembly and comprises various components to heat the aerosol generating material of thearticle 110 via an inductive heating process. Induction heating is a process of heating an electrically conducting object (such as a susceptor) by electromagnetic induction. An induction heating assembly 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. In cases where 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. In 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 induction heating assembly of the
example device 100 comprises a susceptor arrangement 132 (herein referred to as “a susceptor”), afirst inductor coil 124 and asecond inductor coil 126. The first and second inductor coils 124, 126 are made from an electrically conducting material. In this example, the first and second inductor coils 124, 126 are made from Litz wire/cable which is wound in a helical fashion to provide helical inductor coils 124, 126. 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. In theexample device 100, the first and second inductor coils 124, 126 are made from copper Litz wire which has a rectangular cross section. In other examples the Litz wire can have other shape cross sections, such as circular. - The
first inductor coil 124 is configured to generate a first varying magnetic field for heating a first section of thesusceptor 132 and thesecond inductor coil 126 is configured to generate a second varying magnetic field for heating a second section of thesusceptor 132. In this example, thefirst inductor coil 124 is adjacent to thesecond inductor coil 126 in a direction along thelongitudinal axis 134 of the device 100 (that is, the first and second inductor coils 124, 126 to not overlap). Thesusceptor arrangement 132 may comprise a single susceptor, or two or more separate susceptors.Ends 130 of the first and second inductor coils 124, 126 can be connected to thePCB 122. - It will be appreciated that the first and second inductor coils 124, 126, in some examples, may have at least one characteristic different from each other. For example, the
first inductor coil 124 may have at least one characteristic different from thesecond inductor coil 126. More specifically, in one example, thefirst inductor coil 124 may have a different value of inductance than thesecond inductor coil 126. InFIG. 5 , the first and second inductor coils 124, 126 are of different lengths such that thefirst inductor coil 124 is wound over a smaller section of thesusceptor 132 than thesecond inductor coil 126. Thus, thefirst inductor coil 124 may comprise a different number of turns than the second inductor coil 126 (assuming that the spacing between individual turns is substantially the same). In yet another example, thefirst inductor coil 124 may be made from a different material to thesecond inductor coil 126. In some examples, the first and second inductor coils 124, 126 may be substantially identical. - In this example, the
first inductor coil 124 and thesecond inductor coil 126 are wound in opposite directions. This can be useful when the inductor coils are active at different times. For example, initially, thefirst inductor coil 124 may be operating to heat a first section/portion of thearticle 110, and at a later time, thesecond inductor coil 126 may be operating to heat a second section/portion of thearticle 110. 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. InFIG. 5 , thefirst inductor coil 124 is a right-hand helix and thesecond inductor coil 126 is a left-hand helix. However, in another embodiment, the inductor coils 124, 126 may be wound in the same direction, or thefirst inductor coil 124 may be a left-hand helix and thesecond inductor coil 126 may be a right-hand helix. - The
susceptor 132 of this example is hollow and therefore defines a receptacle within which aerosol generating material is received. For example, thearticle 110 can be inserted into thesusceptor 132. In this example thesusceptor 120 is tubular, with a circular cross section. - The
susceptor 132 may be made from one or more materials. Preferably thesusceptor 132 comprises carbon steel having a coating of Nickel or Cobalt. - In some examples, the
susceptor 132 may comprise at least two materials capable of being heated at two different frequencies for selective aerosolization of the at least two materials. For example, a first section of the susceptor 132 (which is heated by the first inductor coil 124) may comprise a first material, and a second section of thesusceptor 132 which is heated by thesecond inductor coil 126 may comprise a second, different material. In another example, the first section may comprise first and second materials, where the first and second materials can be heated differently based upon operation of thefirst inductor coil 124. The first and second materials may be adjacent along an axis defined by thesusceptor 132, or may form different layers within thesusceptor 132. Similarly, the second section may comprise third and fourth materials, where the third and fourth materials can be heated differently based upon operation of thesecond inductor coil 126. The third and fourth materials may be adjacent along an axis defined by thesusceptor 132, or may form different layers within thesusceptor 132. Third material may the same as the first material, and the fourth material may be the same as the second material, for example. Alternatively, each of the materials may be different. The susceptor may comprise carbon steel or aluminium for example. - The
device 100 ofFIG. 7 further comprises an insulatingmember 128 which may be generally tubular and at least partially surround thesusceptor 132. The insulatingmember 128 may be constructed from any insulating material, such as plastic for example. In this particular example, the insulating member is constructed from polyether ether ketone (PEEK). The insulatingmember 128 may help insulate the various components of thedevice 100 from the heat generated in thesusceptor 132. - The insulating
member 128 can also fully or partially support the first and second inductor coils 124, 126. For example, as shown inFIG. 5 , the first and second inductor coils 124, 126 are positioned around the insulatingmember 128 and are in contact with a radially outward surface of the insulatingmember 128. In some examples the insulatingmember 128 does not abut the first and second inductor coils 124, 126. For example, a small gap may be present between the outer surface of the insulatingmember 128 and the inner surface of the first and second inductor coils 124, 126. - In a specific example, the
susceptor 132, the insulatingmember 128, and the first and second inductor coils 124, 126 are coaxial around a central longitudinal axis of thesusceptor 132. -
FIG. 8 shows a side view ofdevice 100 in partial cross-section. Theouter cover 102 is present in this example. The rectangular cross-sectional shape of the first and second inductor coils 124, 126 is more clearly visible. - The
device 100 further comprises asupport 136 which engages one end of thesusceptor 132 to hold thesusceptor 132 in place. Thesupport 136 is connected to thesecond end member 116. - The device may also comprise a second printed
circuit board 138 associated within thecontrol element 112. - The
device 100 further comprises a second lid/cap 140 and aspring 142, arranged towards the distal end of thedevice 100. Thespring 142 allows thesecond lid 140 to be opened, to provide access to thesusceptor 132. A user may open thesecond lid 140 to clean thesusceptor 132 and/or thesupport 136. - The
device 100 further comprises anexpansion chamber 144 which extends away from a proximal end of thesusceptor 132 towards the opening 104 of the device. Located at least partially within theexpansion chamber 144 is aretention clip 146 to abut and hold thearticle 110 when received within thedevice 100. Theexpansion chamber 144 is connected to theend member 106. -
FIG. 9 is an exploded view of thedevice 100 ofFIG. 8 , with theouter cover 102 omitted. -
FIG. 10A depicts a cross section of a portion of thedevice 100 ofFIG. 8 .FIG. 10B depicts a close-up of a region ofFIG. 10A .FIGS. 10A and 10B show thearticle 110 received within thesusceptor 132, where thearticle 110 is dimensioned so that the outer surface of thearticle 110 abuts the inner surface of thesusceptor 132. This ensures that the heating is most efficient. Thearticle 110 of this example comprisesaerosol generating material 110 a. Theaerosol generating material 110 a is positioned within thesusceptor 132. Thearticle 110 may also comprise other components such as a filter, wrapping materials and/or a cooling structure. -
FIG. 10B shows that the outer surface of thesusceptor 132 is spaced apart from the inner surface of the inductor coils 124, 126 by adistance 150, measured in a direction perpendicular to alongitudinal axis 158 of thesusceptor 132. In one particular example, thedistance 150 is about 3 mm to 4 mm, about 3-3.5 mm, or about 3.25 mm. -
FIG. 10B further shows that the outer surface of the insulatingmember 128 is spaced apart from the inner surface of the inductor coils 124, 126 by adistance 152, measured in a direction perpendicular to alongitudinal axis 158 of thesusceptor 132. In one particular example, thedistance 152 is about 0.05 mm. In another example, thedistance 152 is substantially 0 mm, such that the inductor coils 124, 126 abut and touch the insulatingmember 128. - In one example, the
susceptor 132 has awall thickness 154 of about 0.025 mm to 1 mm, or about 0.05 mm. - In one example, the
susceptor 132 has a length of about 40 mm to 60 mm, about 40 mm to 45 mm, or about 44.5 mm. - In one example, the insulating
member 128 has awall thickness 156 of about 0.25 mm to 2 mm, 0.25 mm to 1 mm, or about 0.5 mm. - In use, the
article device 100 described with reference toFIGS. 6 to 10B . At least a portion of themouthpiece 20 of thearticle 110 protrudes from the non-combustibleaerosol provision device 100 and can be placed into a user's mouth. An aerosol is produced by heating theaerosol generating material 2 using thedevice 100. The aerosol produced by theaerosol generating material 2 passes through themouthpiece 20 to the user's mouth. - The various embodiments described herein are presented only to assist in understanding and teaching the claimed features. These embodiments are provided as a representative sample of embodiments only, and are not exhaustive and/or exclusive. It is to be understood that advantages, embodiments, examples, functions, features, structures, and/or other aspects described herein are not to be considered limitations on the scope of the invention as defined by the claims or limitations on equivalents to the claims, and that other embodiments may be utilised and modifications may be made without departing from the scope of the claimed invention. Various embodiments of the invention 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. In addition, this disclosure may include other inventions not presently claimed, but which may be claimed in future.
Claims (45)
1. An article for use as or as part of a non-combustible aerosol provision system, the article comprising:
an aerosol-generating material comprising at least one aerosol forming material; and
a cylindrical body disposed downstream of the aerosol-generating material, wherein the distance between the downstream end of the aerosol-generating material and the upstream end of the cylindrical body is less than about 22 mm.
2. An article according to claim 1 , comprising a hollow tubular body disposed downstream of the aerosol generating material, the hollow tubular body having a wall thickness greater than about 0.5 mm.
3. An article according to claim 2 , wherein the cylindrical body is disposed immediately downstream of the hollow tubular body,
4. An article according to claim 2 , wherein the article further comprises a hollow tubular member disposed immediately upstream of the hollow tubular body.
5. An article according to claim 4 , wherein the hollow tubular body has a first inner diameter, and wherein the hollow tubular member has a second inner diameter; and
wherein the second inner diameter is greater than the first inner diameter.
6. An article according to claim 5 , wherein the second inner diameter is at least about 1 mm, 1.5 mm or 2 mm greater than the first inner diameter.
7. An article according to claim 5 , wherein the second inner diameter is between about 4 mm and about 7.5 mm and wherein the first inner diameter is between about 2 mm and about 4.5 mm.
8. An article according to claim 4 , wherein the aerosol generating material is provided in an aerosol generating material section, and the aerosol generating material section has a length greater than a length of the hollow tubular member.
9. An article according to claim 4 , wherein the hollow tubular member has length less than about 20 mm, or less than about 19 mm, or less than about 18 mm.
10. An article according to claim 4 , wherein the hollow tubular member is formed from paper, plastic, or filamentary tow.
11. An article according to claim 2 , wherein the hollow tubular body is formed from paper, plastic, or filamentary tow.
12. An article according to claim 2 , wherein the hollow tubular body comprises triacetin in an amount less than about 16% by weight of the hollow tubular body, or less than about 15% by weight of the hollow tubular body, or less than about 13% by weight of the hollow tubular body.
13. An article according to claim 1 , wherein the article further comprises a second hollow tubular body disposed at the downstream end of the article.
14. An article according to claim 13 , wherein the second hollow tubular body is formed from paper, plastic or filamentary tow and/or wherein the second hollow tubular body has a wall thickness of at least about 0.5 mm.
15. An article according to claim 1 , wherein the first hollow tubular body and/or the second hollow tubular body have a density of between 0.25 g/cc and 0.75 g/cc.
16. An article according to claim 1 , wherein the cylindrical body is circumscribed by a wrapping material, said wrapping material comprising an embossed pattern.
17. An article according to claim 1 , wherein the cylindrical body is substantially continuous throughout its volume.
18. A method of forming an article for use as or as part of a non-combustible aerosol provision system, the method comprising:
providing an aerosol-generating material comprising at least one aerosol forming material; and
disposing a cylindrical body downstream of the aerosol-generating material, such that the upstream end of the cylindrical body is less than about 22 mm from the downstream end of the aerosol-generating material.
19. A non-combustible aerosol provision system, the system comprising:
an article according to claim 1 , and
a non-combustible aerosol provision device comprising a heater.
20. A system comprising:
a non-combustible aerosol provision device; and
an article according to claim 1 , wherein the aerosol generating material is provided with an amount of nicotine;
wherein the aerosol generated by the system, in use, comprises at least 30% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 35% of the amount of nicotine provided in the aerosol generating material prior to use, or at least 40% of the amount of nicotine provided in the aerosol generating material prior to use.
21. A system according to claim 19 , wherein use comprises following a standard puffing regime.
22. A system comprising:
a non-combustible aerosol provision device; and
an article according to claim 1 , wherein the aerosol generating material is provided with an amount of glycerol;
wherein the aerosol generated by the system, in use, comprises at least 15% of the amount of glycerol provided in the aerosol generating material prior to use, or at least 20% of the amount of glycerol provided in the aerosol generating material prior to use.
23. A system according to claim 21 , wherein use comprises following a standard puffing regime.
24. An article for use as or as part of a non-combustible aerosol provision system, the article comprising:
an aerosol generating material comprising at least one aerosol forming material;
a hollow tubular member disposed downstream of the aerosol generating material, the hollow tubular member comprising one or more ventilation areas; and
a substantially cylindrical body disposed downstream of the hollow tubular member, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular member being at least 8 mm,
wherein the one or more ventilation areas are provided between 12 mm and 21 mm from the downstream end of the article.
25. An article according to claim 24 , wherein the one or more ventilation areas are provided between 12 mm and 16 mm, between 16 mm and 20 mm, or between 18 mm and 19 mm from the downstream end of the article.
26. An article according to claim 24 , wherein the one or more ventilation areas are provided at approximately 18.5 mm from the downstream end of the article.
27. An article according to claim 24 , wherein the one or more ventilation areas are provided at 3.5 mm or less from the downstream end of the hollow tubular member.
28. An article according to claim 24 , wherein the one or more ventilation areas comprise one or more apertures or perforations.
29. An article according to claim 24 , wherein the one or more ventilation areas are provided in the hollow tubular member.
30. An article according to claim 24 , wherein the one or more ventilation areas are provided in a wrapper surrounding the hollow tubular member.
31. An article according to claim 24 , wherein the ventilation level is between 40% and 80%, or between 50% and 70%.
32. An article according to claim 31 , wherein the ventilation level is between approximately 60%.
33. An article according to claim 24 , wherein the cylindrical body is disposed immediately downstream of and adjacent to the hollow tubular body.
34. An article according to claim 24 , wherein the hollow tubular member is formed from paper, plastic, or filamentary tow.
35. An article according to claim 24 , wherein the hollow tubular body is formed of paper and has a wall thickness of less than 0.5 mm.
36. An article according to claim 24 , wherein the cylindrical body is circumscribed by a wrapping material, said wrapping material comprising an embossed pattern.
37. An article according to claim 24 , wherein the cylindrical body is substantially continuous throughout its volume.
38. An article according to claim 24 , wherein the article comprises at least one further cylindrical body disposed downstream of the hollow tubular member.
39. An article according to claim 24 , wherein the cylindrical body is formed from filamentary tow.
40. An article according to claim 24 , wherein the cylindrical body has a length between 8 mm and 17 mm, between 11 mm and 13 mm, between 15 mm and 17 mm, or between 17 and 21 mm.
41. An article according to claim 24 , wherein the aerosol generating material is a rod of aerosol generating material having a length of between 22 mm and 30 mm, between 24 mm and 28 mm, or approximately 26 mm.
42. An article according to claim 24 , wherein the hollow tubular member has a length of between 17 mm and 26 mm, between 18 mm and 24 mm, or between 24 mm and 26 mm, or between 20 mm and 22 mm.
43. A method of forming an article according to claim 24 , the method comprising:
providing an aerosol-generating material comprising at least one aerosol forming material; and
disposing a hollow tubular member downstream of the aerosol generating material; disposing a substantially cylindrical body downstream of the hollow tubular member, the downstream end of the cylindrical body forming the downstream end of the article, and the distance between the downstream end of the cylindrical body and the downstream end of the hollow tubular member being at least 8 mm; and
providing at least one ventilation area between 12 mm and 21 mm from the downstream end of the article.
44. An article for use as or as part of a non-combustible aerosol provision system, the article comprising:
an aerosol generating material comprising at least one aerosol forming material;
a hollow tubular member disposed downstream of the aerosol generating material, the hollow tubular member comprising one or more ventilation areas; and
a substantially cylindrical body disposed downstream of the hollow tubular member, the downstream end of the substantially cylindrical body forming the downstream end of the article, and the distance between the downstream end of the article and the downstream end of the hollow tubular member being at least 8 mm, wherein the one or more ventilation areas are provided less than 3.5 mm from the downstream end of the hollow tubular member.
45. A non-combustible aerosol provision system, the system comprising:
an article according to claim 44 ; and
a non-combustible aerosol provision device comprising a heater.
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GBGB2019584.8A GB202019584D0 (en) | 2020-12-11 | 2020-12-11 | Article for use in an aerosol provision system |
GB2019584.8 | 2020-12-11 | ||
GBGB2020307.1A GB202020307D0 (en) | 2020-12-11 | 2020-12-21 | Article for use in an aerosol provision system |
GB2020307.1 | 2020-12-21 | ||
GBGB2105211.3A GB202105211D0 (en) | 2020-12-11 | 2021-04-12 | Article for use in an aerosol provision system |
GB2105211.3 | 2021-04-12 | ||
PCT/GB2021/053236 WO2022123262A1 (en) | 2020-12-11 | 2021-12-10 | Article for use in an aerosol provision system |
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US20070074734A1 (en) * | 2005-09-30 | 2007-04-05 | Philip Morris Usa Inc. | Smokeless cigarette system |
EP2253231A1 (en) * | 2009-05-18 | 2010-11-24 | Philip Morris Products S.A. | Smoking article with improved flow restriction element |
KR102330291B1 (en) * | 2018-07-04 | 2021-11-24 | 주식회사 케이티앤지 | Cigarrets |
WO2020100879A1 (en) * | 2018-11-14 | 2020-05-22 | 日本たばこ産業株式会社 | Tobacco-containing segment and method for producing same, noncombustible heating-smoking article and noncombustible heating-smoking system |
KR102403222B1 (en) * | 2018-11-23 | 2022-05-27 | 주식회사 케이티앤지 | Cigarette and aerosol generating apparatus therefor |
BR112021010712A2 (en) * | 2018-12-20 | 2021-08-31 | Philip Morris Products S.A. | AEROSOL GENERATOR ARTICLE WITH VENTILATED HOLLOW SEGMENT |
GB201903282D0 (en) * | 2019-03-11 | 2019-04-24 | Nicoventures Trading Ltd | An article for use in a non-combustable aerosol provision |
GB201919064D0 (en) * | 2019-12-20 | 2020-02-05 | Nicoventures Trading Ltd | Article for use in an aerosol provision system |
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