Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
  • A24D1/00—Cigars; Cigarettes
  • A24D1/20—Cigarettes specially adapted for simulated smoking devices
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
  • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
  • A24B15/167—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes in liquid or vaporisable form, e.g. liquid compositions for electronic cigarettes
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/32—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by acyclic compounds
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B3/00—Preparing tobacco in the factory
  • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
  • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
  • A24C5/01—Making cigarettes 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
  • A24D1/002—Cigars; Cigarettes with additives, e.g. for flavouring
• • 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
  • A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
  • A24D1/045—Cigars; Cigarettes with mouthpieces or filter-tips with smoke filter means
• • 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
  • A24D3/048—Tobacco smoke filters characterised by their shape or structure containing additives
• • 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
  • A24D3/061—Use of materials for tobacco smoke filters containing additives entrapped within capsules, sponge-like material or the like, for further release upon smoking
• • 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
  • A24F40/10—Devices using liquid 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
  • A24F40/20—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
  • A24F40/30—Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges

Definitions

• the invention relates to tobacco constituent releasing components comprising tobacco particles in an agglomerated structure.
• the invention also relates to tobacco industry products including the tobacco constituent releasing components and to methods of manufacturing the tobacco constituent releasing components. Background
• a tobacco constituent releasing component comprising an agglomerated structure formed from a precursor composition comprising tobacco particles, the release of the tobacco constituents upon heating the component without combustion being controlled by adjusting one or more of: (i) the surface area to volume ratio of the component; and (ii) the amount of aerosol forming agent(s) included.
• the one or more aerosol forming agent is included in an amount of from about 3% to about 30% by weight of the component, preferably in an amount of from about 15% to about 30% by weight of the component.
• a tobacco constituent releasing component comprising an agglomerated structure formed from a precursor composition comprising tobacco particles and at least 10 % by weight of at least one aerosol forming agent, the tobacco constituent releasing component having one or more undulating or irregular surfaces and/ or channels within the component, and wherein the tobacco within the component does not have a basic pH.
• the tobacco constituent releasing component has one or more inner channels extending through the component.
• the tobacco constituent releasing component has a cross- sectional shape of a spoked wheel or a star.
• the agglomerated structure is formed by extrusion.
• the aerosol forming agent is one or more selected from the group consisting of glycerol, propylene glycol and glyceryl triacetate.
• the tobacco constituent releasing component is impregnated with one or more aerosol forming agents, and/or the tobacco particles are impregnated with the one or more aerosol forming agents.
• the tobacco constituent releasing component comprises at least 50% by weight tobacco particles.
• the tobacco constituent releasing component comprises at least 8o% by weight a combination of tobacco particles and aerosol forming agent.
• the tobacco particles have an average diameter no greater than 0.5 mm and preferably wherein the tobacco particles have an average particle size within the range of about o.i to about 0.4 mm.
• the tobacco constituent releasing component has a generally rod-shaped external form.
• the tobacco constituent releasing component has a diameter of from about 4 mm to about 10 mm, and preferably from about 5 mm to about 8 mm.
• the tobacco constituent releasing component has a length of from about 5 mm to about 80 mm, and preferably from about 10 mm to about 25 mm. In some embodiments, the tobacco constituent releasing component does not have a basic pH and/or the precursor composition does not have a basic pH. In some embodiments, the precursor composition does not include a basic pH adjusting agent. In some embodiments, the tobacco constituent releasing component further comprises one or more binders, preferably wherein the one or more binders are selected from the group consisting of: starches, polysaccharides, pectins, celluloses, cellulose derivatives such as carboxymethylcellulose, and alginates. In some embodiments, the tobacco constituent releasing component does not comprise a binder to assist agglomeration of the tobacco particles.
• the tobacco constituent releasing component further comprises one or more flavour-modifying additive.
• a process for preparing a tobacco constituent releasing component comprising forming an agglomerated structure from a precursor composition comprising tobacco particles, wherein a desired release of the tobacco constituents is provided upon heating the component without combustion by adjusting one or more of: (i) the surface area to volume ratio of the component; and (ii) the amount of aerosol forming agent(s) included.
• the process is for preparing a tobacco constituent releasing component according to the first aspect.
• a process for preparing a tobacco constituent releasing component comprising forming by extrusion an agglomerated structure from a precursor composition comprising tobacco particles and at least 10 % by weight of at least one aerosol forming agent, the extruded tobacco constituent releasing component having one or more undulating or irregular surfaces and/or channels within the component, and wherein the process does not include adjusting the pH of the tobacco within the component to a basic pH.
• the precursor composition is extruded to form the agglomerated structure. In some embodiments of the processes, the precursor composition is extruded through a die to provide one or more inner channels extending through the component.
• the precursor composition is extruded through a die to provide the component with a cross-sectional shape of a spoked wheel or a star.
• the precursor composition is heated to a temperature of from about 40°C to about 120°C. In some embodiments of the processes, the precursor composition is cooled during or after extrusion, preferably wherein the precursor composition is cooled by exposure to a surface having a temperature of from about 5°C to about 15°C.
• the pH of the component and/or of the precursor composition is not adjusted to a basic pH.
• the precursor composition does not include a basic pH adjusting agent.
• a fifth aspect of the invention in the preparation of a tobacco constituent releasing component having an agglomerated structure formed from a precursor composition comprising tobacco particles and one or more aerosol forming agents, the use of a step of selecting one or more of: (i) the surface area to volume ratio of the component; and (ii) the amount of aerosol forming agent(s) included, to provide the tobacco constituent releasing component with a desired release of the tobacco constituents upon heating the component without combustion.
• the use is for preparing a tobacco constituent releasing component according to the first aspect.
• the surface area to volume ratio of the component is increased by forming the agglomerated structure to provide one or more inner channels extending through the component.
• the component has a cross-sectional shape of a spoked wheel or a star.
• the pH of the component and/or of the precursor composition is not adjusted to a basic pH.
• the precursor composition does not include a basic pH adjusting agent.
• a smoking article comprising a filter and a rod of smokeable material
• the filter comprising a tobacco constituent releasing component according to the first aspect.
• the filter or filter element for a combustible smoking article comprises a tobacco constituent releasing component according to the first aspect.
• an apparatus for heating smokeable material without combustion to volatilise at least one component of the smokeable material comprising one or more tobacco constituent releasing components according to the first aspect.
• the apparatus further comprises liquid which is to be heated to form a vapour, optionally wherein the liquid does not comprise nicotine.
• the smokeable material is heated by the vapour.
• a means for heating the liquid to form a vapour is included, but a separate means for heating the smokeable material is not included.
• Figure 1 is a flow chart showing key steps of a process according to embodiments of the present invention.
• Figures 2a, 2b and 2c show examples of nozzle designs for forming extruded
• Figure 3 shows a series of extruded agglomerates, showing different cross-sectional geometries forming inner channels
• Figure 4a shows an example of a die used to produce granules by extrusion, whilst Figure 4b shows how such a die may be used to form the extruded agglomerates;
• Figure 5 is a schematic representation of some extruded granules
• Figure 6 is a schematic cross-sectional view of a tobacco heating product for heating smokeable material to volatilise at least one component of the smokeable material including a tobacco constituent releasing component;
• Figure 7 is a schematic view of a Hybrid device for heating smokeable material to volatilise at least one component of the smokeable material including a tobacco constituent releasing component;
• Figure 8 is a schematic cross-sectional view of an example of a cartridge containing multiple tobacco constituent releasing components.
• Figure 9 is a schematic side view of a combustible smoking article including a filter comprising multiple tobacco constituent releasing components;
• Figure 10 is a schematic side view of a combustible smoking article including a filter comprising a single tobacco constituent releasing component;
• Figure 11 is a schematic side view of a combustible smoking article including a multi segment filter wherein one filter segment is a tobacco constituent releasing component.
• the invention relates to tobacco constituent releasing components that are formed from tobacco particles. These components are able to release tobacco constituents including flavours and nicotine. They may also act as a carrier for other materials that are to be released.
• the tobacco constituent releasing components are suitable for incorporation into various tobacco industry products. At least some of the released constituents are directly derived from the tobacco particles used to form the components.
• further materials may be added to the components for release. These further materials may, for example, also comprise tobacco constituents added to supplement those directly derived from the tobacco particles. Alternatively or in addition, the further materials added to the components for release may not be derived from tobacco. For example, the
• components may also, in some embodiments, carry and release other flavours, including those not derived from tobacco.
• the tobacco constituent releasing component is able to modify the aerosol produced by said product during use.
• the flow of air or aerosol over and/ or through the component, optionally with heating, causes the release of materials from the component.
• the released materials may, in some embodiments, include tobacco constituents such as flavours and aromas, as well as other tobacco derived materials such as nicotine, and, where included in the tobacco constituent releasing component, materials that are not derived from tobacco or are not derived from the tobacco particles included in the components.
• the released materials become entrained in the air or aerosol, modifying it.
• the flavour, aroma or taste of the aerosol produced by the tobacco industry product is modified by the tobacco constituent releasing component.
• the aerosol is enriched with natural tobacco flavours and aromas.
• the aerosol is modified with non-tobacco flavours as a result of flavours or flavour sources being incorporated into the tobacco constituent releasing components.
• the aerosol may be modified by the addition of nicotine.
• the mouthfeel of the aerosol may be modified by materials, such as aerosol forming agents, released by the tobacco component releasing components.
• the tobacco constituent releasing components are agglomerated structures formed from a precursor composition comprising tobacco particles. This means that the components are a mass or cluster formed by fusing or adhering multiple particles to one another.
• the constituent particles include tobacco particles.
• particles of other materials may also be included.
• the release of materials from the tobacco constituent releasing components maybe controlled and adapted to the specific requirements of the tobacco industry product into which it is to be incorporated. In particular, it is desirable to control the rate and extent of release.
• the release of materials is key for providing the desired flavour profile during use of the tobacco industry product, as well as the desired sensorial experience. In particular, it maybe desirable to control how quickly the release occurs following commencement of the use of the product, the longevity of release and the consistency of release. It is also important to ensure that a significant proportion of the materials to be released contained in the tobacco constituent releasing component is actually released during the normal use of the tobacco industry product.
• a tobacco constituent releasing component comprising an agglomerated structure formed from a precursor composition comprising tobacco particles, the release of the tobacco constituents upon heating the component without combustion being controlled by adjusting one or more of: (i) the surface area to volume ratio of the component; and (ii) the amount of aerosol forming agent(s) included.
• an increased surface area of the tobacco constituent releasing component will increase the release of the tobacco constituents and other materials.
• the increased surface area to volume ratio means that more of the tobacco constituents and other materials will be situated closer to the surface of the component, so that they are heated and released more readily, and a greater proportion is released.
• an increased surface area or an increased surface area to volume ratio refers to in a comparison with the surface area of a solid structure which is roughly spheroid or has a cylindrical rod shape or the same volume.
• the shape of the tobacco constituent releasing components maybe selected to increase the surface area to volume ratio, for example by increasing the surface area by creating undulating or irregular surfaces or by creating channels within the components. It is desirable to reduce the distance from the surface of the component of the tobacco constituents and other materials to be released, so that as much of these materials may be released during use of the tobacco industry product, rather than remaining trapped within the agglomerated structure. Increased proximity of the tobacco constituents and other materials to the surface of the tobacco constituent releasing component will also mean that the materials can be released in a controlled manner as they will be more readily heated and volatilise when the component is heated.
• the surface area of the tobacco constituent releasing component, and thus the release of the tobacco constituents and other materials, may also be increased by the presence of pores within the agglomerated structure. Such pores will reduce the density of the agglomerated structure, enhancing thermal transfer throughout the tobacco constituent releasing component.
• pores may be formed by including porous materials in the precursor composition. Selecting larger diameter tobacco particles and/or tobacco particles with a narrow particle size distribution can also enhance the formation of small gaps or pores within the agglomerated structure.
• pores may be formed in the agglomerated structure after the agglomerated structure has been made from the precursor composition, for example by puncturing the structure or by selectively removing part or parts of the agglomerated structure.
• a combination of the shape of the tobacco constituent releasing component and the porosity/ density may be selected to control the surface area to volume ratio and/ or to control: (i) the heat transfer rate; (ii) the aerosol production rate; (iii) the amount of aerosol produced; and (iv) the extent of the release of the tobacco constituents and other materials.
• the tobacco constituent releasing components according to the invention include at least one aerosol forming agent. It is known to use aerosol forming agents to improve the mouthfeel of aerosols. The amount of aerosol forming agent that is included in tobacco components or materials, such as those included in tobacco heating products, tends to be limited as the aerosol forming agents are generally in liquid form and are present on the surface of the tobacco material they are added to. As a result, in practice the inclusion of more than about 10% by weight of the aerosol forming agent renders the material difficult to handle and process.
• embodiments of the present invention allow greater amounts of aerosol forming agent to be included. This provides greater flexibility in selecting the amount of aerosol forming agent and this may be used to control or adjust the release of tobacco constituents and other materials from the tobacco constituent releasing components. Release of the aerosol forming agent in the form of an aerosol as a result of the heating (but not combustion) of the tobacco constituent releasing component not only improves the properties of the aerosol generated by the tobacco industry product the component is incorporated into, but also enhances the release of tobacco constituents and other materials from the component. This is particularly the case where the tobacco and/or the agglomerated structure is impregnated with the aerosol forming agent. The amount of aerosol forming agent will also influence the rate at which the aerosol is generated.
• the aerosol forming agent may be, for instance, a polyol aerosol generator or a non polyol aerosol generator, preferably a non-polyol aerosol generator. It may be a solid or liquid at room temperature, but preferably is a liquid at room temperature.
• Suitable polyols include sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol.
• Suitable non-polyols include monohydric alcohols, high boiling point hydrocarbons, acids such as lactic acid, and esters such as diacetin, triacetin, triethyl citrate or isopropyl myristate.
• a combination of aerosol forming agents maybe used, in equal or differing proportions. Glycerol, propylene glycol and glyceryl triacetate (also known as triacetin) are particularly preferred.
• the release of the tobacco constituents or other materials is not controlled by adjusting the pH of the tobacco and/or the precursor composition or of the tobacco constituent releasing component.
• pH adjustment can change the nature of the constituents and may be undesirable or unacceptable from a regulatory standpoint for some products in some jurisdictions.
• the tobacco particles present in the precursor composition have a size small enough to ensure that multiple such particles can be agglomerated to form tobacco constituent releasing components having desired dimensions based upon their intended use.
• Smaller tobacco particles have a greater surface area to volume ratio and they may therefore exhibit enhanced release of tobacco constituents compared to particles of larger sizes.
• the size of the tobacco particles (and of other particles in the precursor composition) will have an effect on the porosity and density of the agglomerated structures and tobacco constituent releasing components.
• the size of the tobacco particles may be selected to produce a more porous agglomerated structure, which will have an impact on the release of the tobacco constituents.
• the size of the tobacco particles is another factor that maybe adjusted in order to influence the release of tobacco constituents.
• the extrusion processes used to form the agglomerated structures can be sensitive to the size of the particles within the composition being extruded. Therefore, it may be desirable for the particles in the precursor composition, including the tobacco particles, to have an average particle size of no greater than about 0.5 mm, or to have an average particle size of no greater than about 0.3 mm, when measured by sieving. In some embodiments, it maybe desirable for the tobacco particles in the precursor
• the composition to have an average particle size of no greater than about 0.5 mm, or to have an average particle size of no greater than about 0.3 mm, when measured by sieving.
• the average particle size is within the range of about 0.1 to about 0.4 mm, or in the range of about 0.2 to about 0.3 mm.
• at least about 90% of the particles of the precursor composition will have a particle size within the range of 0.1 to 0.5 mm.
• at least about 90% of the tobacco particles of the precursor composition will have a particle size within the range of 0.1 to 0.5 mm.
• none of the particles in the precursor composition have a particle size greater than 1 mm.
• Tobacco particles for inclusion in the tobacco constituent releasing components may be formed by grinding, shredding, cutting or crushing tobacco material.
• Suitable machinery to create such tobacco particles includes, for example, shredders, cutters, or mills, such as hammer mills, roller mills or other types of commercially available milling machinery.
• the tobacco material used to form the tobacco particles may be any type of tobacco and any part of the tobacco plant, including tobacco lamina, stem, stalk, ribs, scraps and shorts or mixtures of two or more thereof. Suitable tobacco materials include the following types: Virginia or flue-cured tobacco, Burley tobacco, Oriental tobacco, or blends of tobacco materials, optionally including those listed here.
• the tobacco may be expanded, such as dry-ice expanded tobacco (DIET), or processed by any other means. In some embodiments, the tobacco material may be reconstituted tobacco material.
• the tobacco maybe pre-processed or unprocessed, and maybe, for instance, solid stems (SS); shredded dried stems (SDS); steam treated stems (STS); or any combination thereof.
• SS solid stems
• SDS shredded dried stems
• STS steam treated stems
• the tobacco material may be fermented, cured, uncured, toasted, or otherwise pre-treated.
• the precursor composition comprises a diluent.
• the diluent may be in solid or liquid form. In some embodiments, the diluent is inert or substantially inert.
• the agglomerated structure formed from the precursor composition may have an increased surface area by including in the precursor composition particles of an inert filler material.
• Suitable inert fillers maybe porous or non-porous.
• the precursor composition does not include a binder or binding additive.
• the precursor composition comprises a binder or binding additive.
• the binding additive may be selected to assist in the formation of an agglomerated structure by helping to adhere the tobacco particles to each other and to other components in the composition. Suitable binding additives include, for example, starches, polysaccharides, pectins, celluloses, cellulose derivatives such as
• the tobacco constituent releasing components may include a flavour-modifier, to modify the flavour provided by the tobacco particles or to add flavour.
• the flavour-modifier may be included in the precursor composition.
• the flavour-modifier may be added to or applied to the agglomerated structure.
• Flavour-modifiers include, for example, casing materials, as well as“flavour” and“flavourant” materials which, where local regulations permit, may be used to create a desired taste or aroma in a product for adult
• extracts e.g., licorice, hydrangea, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, menthol, Japanese mint, aniseed, cinnamon, herb, wintergreen, cherry, berry, peach, apple, Drambuie, bourbon, scotch, whiskey, spearmint, peppermint, lavender, cardamon, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, piment, ginger, anise, coriander, coffee, or a mint oil from any species of the genus Mentha), flavour enhancers, bitterness receptor site blockers, sensorial receptor site activators or stimulators, sugars and/or sugar substitutes (e.g., sucralose, acesulfam
• the pH of the tobacco of the tobacco constituent releasing components is not adjusted.
• the component does not have a basic pH and/ or the precursor composition does not have a basic pH.
• the precursor composition preferably does not include a basic pH adjusting agent.
• water may be added to the precursor composition as a processing aid.
• the presence of water may help to dissolve components of the precursor composition, and/or it may assist with binding or improve
• FIG. 1 is a flow chart showing the key steps in the processes of the present invention.
• the tobacco starting material which maybe pre-treated or pre-processed, is provided in the form of particles having the desired particle size.
• the tobacco precursor composition is formed, comprising the tobacco particles, at least one aerosol forming agent and, in some embodiments, may include further additional components. These additional components may be in liquid form or in solid form. Additional solid components are preferably in particulate or powder form. In other embodiments, the additional components may be introduced into the agglomerated structure separate from the tobacco precursor composition.
• water may be added to the precursor composition as a processing aid.
• the presence of water may help to dissolve components of the precursor composition, and/or it may assist with binding or improve
• the precursor composition is formed into an agglomerated structure, i.e., a monolithic structure formed from multiple tobacco particles and the other components of the precursor composition.
• the agglomerated structure may be formed from the precursor composition by a process including one or more steps selected from the group consisting of granulation and/ or extrusion, and optionally also spheronisation.
• Granulation of the precursor composition involves the binding or fusing together of the particles of the precursor composition to form larger, multi-particle entities which are referred to herein as agglomerated structures.
• the multi-particle entities formed by granulation are called granules and they may have various geometric shapes, including, for example, the general form of spheres, cylinders, and the like.
• the granulation step used is wet granulation.
• wet granulation granules are formed by the addition of a granulation liquid onto a powder bed.
• the granulation liquid may be at least partially removed by drying to provide dry granules.
• the granulation liquid may be water-based or solvent-based. Suitable granulation liquids include, for example, water, glycerol, ethanol and isopropanol, either alone or in combination.
• the granulation liquid comprises an aerosol forming agent, such as glycerol or one of the other agents mentioned herein, and/ or a binder or binding agent. In some embodiments, no water is added to the precursor composition to aid granulation.
• the granulation step used is dry granulation.
• dry granulation granules are formed without using a granulation liquid. This type of process has the advantage that it does not expose the precursor composition to moisture and so there is no requirement to expose the granules to heat in order to dry them.
• Forming granules by dry granulation involves compacting and densifying the precursor composition, usually under high pressure. Extrusion of the precursor composition involves the feeding of the precursor composition through an orifice to produce an extruded agglomerate. The process, which applies pressure to the precursor composition combined with shear forces, results in agglomerated structures.
• Extrusion may be performed using one of the main classes of extruders: screw, sieve and basket, roll, and ram extruders.
• Forming the tobacco constituent releasing components by extrusion has the advantage that this processing combines mixing, conditioning, homogenizing and moulding of the precursor composition.
• the free-flowing precursor composition is exposed to elevated pressure and temperature and is forced though an orifice, such as a shaping die, to form an extruded agglomerate.
• the extruded agglomerate has an elongated form and/or it maybe cut into segments of a desired length as it exits the orifice. A rod-like extruded agglomerate may subsequently be cut into segments of desired length.
• the precursor composition comprising tobacco particles is exposed to temperatures from about 40°C to about 150°C, or from about 8o°C to about 130°C within the extruder.
• the composition may be exposed to pressures ranging from about 2 bar to about too bar, or from about 5 bar to about 60 bar, depending on the design of the die being used.
• the tobacco constituent releasing components formed from the extruded agglomerate exhibit good heat transfer and mass transfer, which has a positive impact on the release of tobacco constituents, such as flavours and nicotine.
• the extrusion may be a generally dry process, with the precursor composition being a substantially dry material that includes tobacco particles, as well as optionally other particulate materials including, for example, base, diluent, solid flavour modifiers, etc.
• liquids maybe added to the precursor composition during the extrusion process.
• water may be added to the precursor composition, for example as a processing aid to assist dissolution or solubilisation of components of the composition, or to aid binding or agglomeration.
• a wetting agent may be added to the precursor composition.
• the liquid may be an aerosol forming agent such as glycerol or others discussed herein.
• the liquid is an aerosol forming agent
• this can result in a high availability of the aerosol forming agent in the agglomerated product to enhance evaporation of flavour components from the tobacco particles and other components of the agglomerated structure, enhancing release of tobacco constituents from the resultant extruded tobacco constituent releasing components.
• the amount of aerosol forming agent incorporated into the tobacco constituent releasing component may be at least about 3% by weight, at least about 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% by weight, or at least about 20% by weight. In some embodiments, the amount of aerosol forming agent incorporated into the tobacco constituent releasing component maybe up to about 15%, up to about 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% by weight or up to about 30% by weight.
• the one or more aerosol forming agent is included in an amount of from about 3% to about 30% by weight of the component, preferably in an amount of from about 15% to about 30% by weight of the component.
• the extruded agglomerate will be shaped by the orifice or die through which it is forced. In some embodiments, the extruded agglomerate is cut into pieces of desired length. The pieces formed in this way may be used as tobacco constituent releasing
• the orifice or die is shaped to provide a solid strand of extruded agglomerate.
• the extruded agglomerate may have the form of a solid cylindrical rod.
• the extruded agglomerate may have different cross- sectional shapes, including oval, polygonal (such as triangular, square, etc.), and stars.
• the extruded composition is formed into a desired shape selected to enhance or promote the release of flavour, for example by providing a form having a large surface area per unit volume.
• This large surface area may be provided on the outer surface of the extruded agglomerate, for example by selecting cross-sectional shapes with large perimeter. Alternatively or in addition, the large surface area may be provided through the creation of channels within the extruded agglomerate.
• the orifice or die is shaped to provide an extruded agglomerate with inner channels. These inner channels provide further surface area and can enhance tobacco constituent release.
• FIGS 2a, 2b and 2c Examples of some nozzle or die designs are shown in Figures 2a, 2b and 2c. These nozzles or dies have orifices 21 through which the extruded composition is forced to produce an extruded agglomerate with a cartwheel-like spoked structure. These nozzles or dies are used in an extruder, as shown in Figures 2d and 2e, in which the direction of the flow of the material being extruded is indicated by the arrow A.
• Figure 3 is an image of a series of extruded agglomerates, showing different cross- sectional geometries including inner channels. Some of these extruded agglomerates have been made using the nozzle designs of Figures 2a, 2b and 2c.
• Tobacco constituent releasing components formed from such shaped extruded agglomerate sections have an inner channel structure which has advantageous adjustable strand ventilation properties and a significantly enlarged inner surface leading to improved heat and mass transfer. As a result, such components exhibit better, more uniform release of flavour by evaporation. Furthermore, the structure with inner channels exhibits significantly improved strength in both the radial and axial directions, which is beneficial for the further processing of the extruded agglomerate, for example when it is cut into segments.
• the diameter of the tobacco constituent releasing component is from about 4 mm to about 10 mm, or the diameter may be from about 5 mm to about 8 mm.
• the tobacco constituent releasing component is a cylindrical tobacco segment.
• the cylinder has a diameter of from about 5 mm to about 8 mm and a length of from about 5 mm to about 80 mm, from about 15 mm to about 50 mm, or from about 20 mm to about 30 mm.
• extruded agglomerates with different physical properties may be prepared, including different heat transfer properties, draft resistance, and capable of producing different aerosols and/or of modifying aerosols being drawn through the extruded agglomerate.
• the make up of the precursor composition can also play a very significant role in determining the physical and mechanical properties of the extruded material and, as a consequence, of the tobacco constituent releasing components.
• the extruded agglomerate is shaped upon discharge from the extruder. In some embodiments, the extruded agglomerate is cut to an initial length, for example, 1 metre, and allowed to cool before then being cut into sections of the desired length to provide tobacco constituent releasing components of the desired dimensions. In some embodiments, the extruded agglomerate maybe cooled just before or just as it leaves the extruder.
• the cooling is intensive and involves exposing the extruded agglomerate, which will be at an elevated temperature, for example from about 30°C to about ioo°C, or from about 40°C to about 70°C, to a cooling means that will reduce the temperature to within a range of from about o°C to about 25°C, or from 5°C to about 15°C.
• This rapid cooling of the extruded agglomerate may enhance the internal and external stability of the extruded agglomerate.
• it is the die that is cooled to achieve this effect.
• extrusion of the precursor composition includes reducing the temperature of the precursor composition before it reaches the die.
• Such cooling of the precursor composition may result in the formation of an extruded agglomerate with beneficial properties, or may improve the strand-shaping process, for example where channels are to be formed within the extruded agglomerate strand.
• the precursor composition may be granulated prior to extrusion. Where the precursor composition includes multiple different types of particles, this granulation step can enhance homogenisation within the extruded agglomerate.
• the granulated precursor composition may be fed into an extruder to form the tobacco constituent releasing components.
• Granulation of the precursor composition involves the binding or fusing together of the particles of the precursor composition to form larger, multi-particle entities which are agglomerated structures.
• the multi-particle entities formed by granulation are called granules and they may have various geometric shapes, including, for example, the general form of spheres, cylinders, and the like.
• the granulation step used is wet granulation.
• wet granulation granules are formed by the addition of a granulation liquid onto a powder bed.
• the granulation liquid may be at least partially removed by drying to provide dry granules.
• the granulation liquid may be water-based or solvent-based. Suitable granulation liquids include, for example, water, ethanol and isopropanol, either alone or in combination.
• the granulation liquid comprises an aerosol forming agent, such as glycerol.
• the granulation step used is dry granulation. In dry granulation, granules are formed without using a granulation liquid.
• This type of process has the advantage that it does not expose the precursor composition to moisture and so there is no requirement to expose the granules to heat in order to dry them.
• Forming granules by dry granulation involves compacting and densifying the precursor composition, usually under high pressure.
• spheronisation is used to further process extruded segments. These segments are typically cylindrically-shaped and are cut or broken into uniform lengths following extrusion. They are then gradually transformed into spherical shapes by spheronisation. This shaping occurs as a result of plastic deformation and spheronisation can lead to spherical agglomerated structures, often with a nearly uniform diameter. Incorporation into a product
• a tobacco industry product refers to any item made in, or sold by the tobacco industry, typically including a) cigarettes, cigarillos, cigars, tobacco for pipes or for roll-your-own cigarettes, (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes); b) non-smoking products incorporating tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes such as snuff, snus, hard tobacco, and heat-not-burn (HnB) products; and c) other nicotine-delivery systems such as inhalers, aerosol generation devices including e-cigarettes, lozenges and gum.
• This list is not intended to be exclusive, but merely illustrates a range of products which are made and sold in the tobacco industry.
• an aerosol provision device includes vapour devices such as e-cigarettes, devices for heating smokeable material such as tobacco heating devices and Hybrid devices.
• the apparatus for heating smokeable material to volatilise at least one component of the smokeable material includes so-called“heat not burn” products or tobacco heating devices or products, which release compounds by heating, but not burning, smokeable material.
• Hybrid devices are devices in which a liquid, such as a nicotine-containing liquid or a nicotine-free liquid, is heated to form an aerosol and this aerosol is then drawn through a smokeable material, such as a tobacco segment, picking up tobacco flavours or wherein a separate aerosol is formed by heating a smokeable material.
• the device includes a means for heating the smokeable material directly, in addition to, or as an alternative to, the heating of the smokeable material by the aerosol formed by heating the liquid to form an aerosol.
• the tobacco constituent releasing component maybe positioned within an apparatus or device so that the tobacco constituents that are released become entrained in an aerosol generated by the apparatus or device upon use, modifying the properties of the aerosol, for example by imparting tobacco constituents, including tobacco flavour, to that aerosol. Additionally or alternatively, the tobacco constituent releasing component may itself generate an aerosol during use, said aerosol including the released tobacco constituents.
• an apparatus or device may be provided with a filter having tobacco constituent releasing component located within said filter. This may be in addition to or instead of the apparatus or device including other tobacco constituent releasing components.
• the filter or filter element may comprise a filter material which has a filtering effect.
• Suitable filter material may include, for example, tow comprising or consisting of cellulose acetate, polylactic acid, and/or other suitable polymers, or the filter or filter element may comprise a hard material such as plastic with holes.
• the tobacco constituent releasing components may be located in a cavity within the filter.
• the cavity may, for example, be a cavity section positioned between two (or more) adjacent filter plugs or the cavity may be a pocket defined within a filter plug.
• the tobacco constituent releasing components may be small in size, for example in the form of granules.
• a larger, single tobacco constituent releasing component is incorporated into a filter.
• a single tobacco constituent releasing component may be embedded in a fibrous filter plug material.
• the tobacco constituent releasing component may be incorporated into a multi-segment filter, the tobacco constituent releasing component itself making up one of the filter segments.
• the tobacco constituent releasing component may have any shape or size, but it may be advantageous for the component to a have a cylindrical shape and the dimensions similar to or compatible with those of the filter segments.
• the tobacco constituent releasing component may be surrounded by filter material such as a layer of fibrous filter tow, to form a filter segment.
• the tobacco constituent releasing component may have the dimensions of a filter plug and it maybe incorporated into a filter with one or more adjacent filter plugs.
• a tobacco constituent releasing component may be included in a cavity section positioned between two (or more) adjacent filter plugs.
• the tobacco constituent releasing component itself may be the filter element in the aerosol provision device, it being capable of filtering condensates and other particulate matter in the aerosol, before the aerosol is inhaled by the user.
• components are included in an aerosol provision device or apparatus for heating smokeable material to volatilise at least one component of the smokeable material in which a tobacco segment is heated but not combusted (i.e., a tobacco heating product or so-called Heat-not-Burn product). In some of these products, the tobacco segment is heated to generate an aerosol.
• One option is to incorporate the one or more tobacco constituent releasing components in the filter of such products.
• multiple tobacco constituent releasing components are incorporated into the filter of a tobacco heating product.
• a single tobacco constituent releasing component is incorporated into the filter of a tobacco heating product.
• Another option is to incorporate one or more tobacco constituent releasing components in the tobacco segment of such products.
• one or more tobacco constituent releasing components maybe incorporated into tobacco material to form the tobacco segment.
• the one or more tobacco constituent releasing components may be dispersed within the tobacco material, such as cut tobacco or reconstituted tobacco, to contribute to the flavour imparted by the tobacco.
• the tobacco included in the tobacco segment of the tobacco heating product consists or consists essentially of one or more tobacco constituent releasing components.
• the tobacco segment heated by the tobacco heating product consists of or consists essentially of one or more tobacco constituent releasing component.
• the tobacco constituent releasing component maybe heated directly. Where the tobacco segment is multiple tobacco constituent releasing components, these maybe held in a container or cartridge. At least portions of the container or cartridge maybe permeable to air, to allow air to flow over or through the tobacco constituent releasing components.
• FIG 6 shows a cross-sectional view of an example of a tobacco heating product for heating a smokeable material.
• the apparatus 11 has a heating chamber 14 which in use contains the smokeable material to be heated and volatilised.
• the smokeable material is in the form of a monolithic tobacco constituent releasing component 13.
• the smokeable material could however be multiple tobacco constituent releasing components held in the heating chamber or provided in a cartridge like the one illustrated in Figure 8.
• the apparatus 11 of Figure 6 further has an electronics/power chamber 16 which may, for example, contain electrical control circuitry and/or a power source (not shown).
• the electrical control circuitry may include a controller, such as a microprocessor arrangement, configured and arranged to control the heating of the smokeable material via a heating element (not shown).
• the electrical control circuitry may in use receive a signal from for example a puff-actuated sensor which is sensitive to for example changes in pressure or changes in rate of air flow that occur upon initiation of a draw on the apparatus 11 by a user.
• the electrical control circuitry can then operate so as to cause heating of the smokeable material“on demand”.
• Various arrangements for a puff-actuated sensor are available, including for example a thermistor, an electro- mechanical device, a mechanical device, an optical device, an opto-mechanical device and a micro electro mechanical systems (MEMS) based sensor.
• the apparatus may have a manually operable switch for a user to initiate a puff.
• the heating chamber 14 is contained within the housing 12. There may be a support and/ or insulating means (not shown) positioned between the heating chamber 14 and the housing 12, for example to assist in heat-insulating the housing 12 from the heating chamber 14, so that the housing 12 does not become hot or at least too hot to touch during use.
• the housing 12 includes an inlet 15 through which air is drawn into the apparatus.
• the housing 12 also includes an outlet 17 at a mouthpiece 18 of the apparatus 11. Air is drawn into the apparatus 11 through the inlet 15, travels through the apparatus picking up tobacco constituents released by the tobacco constituent releasing component 13, and the resulting aerosol generated by the apparatus 11 leaves the apparatus 11 through the outlet 19 and is inhaled by the user.
• one or more tobacco constituent releasing components are included in a so-called Hybrid product for heating smokeable material to volatilise at least one component of a smokeable material.
• the tobacco segment is heated to generate an aerosol, in addition to the heating of a liquid, such as a nicotine-containing liquid or a nicotine-free liquid, which is heated by a heat source to form an aerosol or vapour.
• a liquid such as a nicotine-containing liquid or a nicotine-free liquid
• the aerosol or vapour formed from the liquid is drawn over or through the tobacco segment, picking up tobacco flavours.
• the aerosol or vapour formed from the liquid is not drawn over or through the tobacco segment.
• Hybrid products that include a filter
• one option is to incorporate the tobacco constituent releasing components in the filter of such products, in a similar manner to that described for tobacco heating products.
• multiple tobacco constituent releasing components are incorporated into the filter of a Hybrid product.
• a single tobacco constituent releasing component is
• the smoking article is a so-called Hybrid product
• another option is to incorporate the tobacco constituent releasing components in the tobacco segment of such products.
• one or more tobacco constituent releasing components maybe incorporated into tobacco material to form the tobacco segment.
• the one or more tobacco constituent releasing components may be dispersed within the tobacco material, such as cut tobacco or reconstituted tobacco, to contribute to the flavour imparted by the tobacco.
• the tobacco included in the tobacco segment of the Hybrid product consists of one or more tobacco constituent releasing components.
• the tobacco segment in the Hybrid product consists of or consists essentially of one or more tobacco constituent releasing components.
• FIG 7 shows a cross-sectional view of an example of a Hybrid product for heating a smokeable material and a liquid.
• the apparatus 21 has a housing 22 containing a chamber 24 which in use contains the smokeable material to be heated and volatilised.
• the smokeable material is in the form of a monolithic tobacco constituent releasing component 23.
• the smokeable material could however be multiple tobacco constituent releasing components held in the chamber or provided in a cartridge like the one illustrated in Figure 8.
• the housing 22 also contains a liquid reservoir 25 containing a liquid 26 to be heated to form a vapour.
• the apparatus 21 further has an electronics/power chamber 27 which may, for example, contain electrical control circuitry and/or a power source (not shown).
• the electrical control circuitry may include a controller, such as a microprocessor arrangement, configured and arranged to control the heating of the smokeable material and of the liquid 26 via one or more heating elements (not shown).
• the electrical control circuitry may allow the apparatus 21 to be puff-actuated, so as to cause heating of the smokeable material“on demand”.
• the apparatus 22 may have a manually operable switch for a user to initiate a puff.
• the housing 22 also includes an inlet 28 through which air is drawn into the apparatus.
• the housing 22 also includes an outlet 29 at a mouthpiece 30 of the apparatus 21. Air is drawn into the apparatus 21 through the inlet 28, travels through the apparatus picking up the vapour created by heating the liquid 26 in the liquid reservoir 25, and tobacco constituents released by the tobacco constituent releasing component 23, and the resulting aerosol generated by the apparatus 21 leaves the apparatus 21 through the outlet 29 and is inhaled by the user.
• the Hybrid device 21 shown schematically in Figure 7 represents just one possible configuration of such an apparatus. The relative positions of the liquid reservoir 25 and the smokeable material chamber 24 can be changed, as can the path of the air flowing through the apparatus.
• the liquid reservoir is positioned upstream of the smokeable material to be volatilised.
• the liquid reservoir may be positioned downstream of the smokeable material to be volatilised.
• the two sources of aerosol in the apparatus may be arranged side-by-side, etc.
• the vapour produced by heating the liquid in the liquid reservoir flows over or through the smokeable material comprising or consisting of one or more tobacco constituent releasing components.
• the elevated temperature of the vapour causes the tobacco constituents to be released.
• the smokeable material may be separately heated by a heating means.
• a Hybrid device in which the vapour created by heating a liquid heats the smokeable material in order to volatilise at least one component of the smokeable material.
• the liquid is a nicotine- free liquid.
• the liquid contains nicotine.
• the device does not include a separate means for heating the smokeable material.
• the smokeable material may comprise or consist of at least one tobacco constituent releasing component.
• the vapour produced by heating the liquid in the liquid reservoir does not flows over or through the smokeable material comprising or consisting of one or more tobacco constituent releasing components. Rather, this vapour and the aerosol generated by heating the smokeable material only mix after they are both formed.
• the tobacco heating products and Hybrid products described herein may, in some embodiments, include tobacco segments in the form of containers or cartridges containing one or more tobacco constituent releasing components. These containers or cartridges may be removable. They may replace both the chamber holding the smokeable material and the smokeable material in the apparatus described above with reference to Figures 6 and 7, and in the alternative embodiments discussed.
• a tobacco segment cartridge 31 comprising a housing 32 defining a cavity within which are held one or more tobacco constituent releasing components according to the invention (not shown).
• the housing 32 may, for example be made from moulded plastic or the like.
• ventilation holes 33 are provided in the housing 32 of the cartridge 31.
• the cartridge 31 may further comprise heating means that is heatable by a suitable means in order to heat the one or more tobacco constituent releasing components held therein.
• one or more tobacco constituent releasing components are incorporated into a filter or a filter element for inclusion in a combustible smoking article.
• the term“combustible smoking article” includes smokeable products such as cigarettes, cigars and cigarillos whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes.
• the combustible smoking articles include a rod of smokeable material and a filter comprising at least one filter element.
• the term“combustible smoking article” does not include Heat-not-Burn (HnB) products, or other nicotine delivery products such as aerosol generation devices including e-cigarettes or Hybrid products.
• HnB Heat-not-Burn
• the tobacco constituent releasing component maybe positioned within the filter or within a filter element making up the filter of the combustible smoking article, so that the released tobacco constituents become entrained in an aerosol generated by the smoking article upon use, modifying the properties of the aerosol, for example by imparting tobacco constituents, including tobacco flavour, to that aerosol.
• Filters and filter elements for use in combustible smoking articles include filter material to remove certain smoke constituents from the mainstream smoke drawn through the smoking article during use. The filter material is gathered together to form a rod which is cut to form individual filter segments.
• the filter for a smoking article may be made of one segment of filter rod, or may be made from multiple filter elements, with or without a cavity or spaces between them.
• a widely used filter material is a continuous tow of filamentary cellulose acetate plasticised with triacetin.
• Other filter materials can comprise at least one material selected from polyvinyl alcohol (PVOH), polylactic acid (PLA), poly( -cap rolactone)(PCL), poly(i-4 butanediol succinate)(PBS), polyfbutylene adipate-co-terephthalate)(PBAT), starch based materials, paper, aliphatic polyester materials and polysaccharide polymers in the form of sheets or fibres.
• PVOH polyvinyl alcohol
• PLA polylactic acid
• PCL poly( -cap rolactone)
• PBS poly(i-4 butanediol succinate)
• PBAT polyfbutylene adipate-co-terephthalate
• starch based materials paper, aliphatic polyester materials and polysaccharide polymers in the form of sheets or fibres.
• the filter can have a cylindrical shape and generally have a length and an overall circumference to suit the type of combustible smoking articles they are to be used in.
• Smoking articles such as cigarettes and their formats are often named according to the cigarette 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).
• a cigarette in a king-size, super-slim format will, for example, have a length of about 83 mm and a circumference of about 17 mm.
• Cigarettes in the regular, king-size format have a circumference of from 23 to 25 mm and an overall length of from 75 to 91 mm.
• Each format may be produced with filters of different lengths, smaller filters being generally used in formats of smaller lengths and circumferences.
• the filter length will be from 15 mm, associated with short, regular formats, to 30 mm, associated with ultra-long super-slim formats.
• the tipping paper will have a greater length than the filter, for example from 3 to 10 mm longer.
• the smoking may involve 8-9 puffs and the first 5-6 puffs are accompanied by only slight increases in temperature during the puffs.
• the first puffs may be accompanied by a temporary increase in
• the temperature of in the region of i-5°C with the temperature remaining between 20 and 30°C, and in some cases, between 23 and 26°C.
• the temperature starts to increase more during the puffs, with peaks starting to exceed 30°C, and exceeding 6o°C for the penultimate and last puffs.
• This temperature change may be used to trigger or assist the release of materials from the tobacco constituent releasing component during use of the smoking article.
• the rise in temperature may help to volatilise remaining components which have not been released during the first few puffs.
• materials may be included in the tobacco constituent releasing component specifically to be released or to enhance release of tobacco constituents at these elevated temperatures.
• multiple tobacco constituent releasing components are incorporated into the filter element for a combustible smoking article.
• a single tobacco constituent releasing component is incorporated into the filter element. Where multiple tobacco constituent releasing components are incorporated into a filter, this maybe in a“Dalmatian” style filter section, where the tobacco constituent releasing components are dispersed throughout a fibrous filter plug material.
• a smoking article 21 comprises a filter 22 and a cylindrical rod of smokeable material 23, such as tobacco, aligned with the filter 22 such that one end of the smokeable material rod 23 abuts the end of the filter 22.
• the filter 22 is wrapped in a plug wrap (not shown) and the smokeable material rod 23 is joined to the filter 22 by tipping paper in a conventional manner.
• the filter 22 is substantially cylindrical and comprises filter material 24 throughout which are dispersed tobacco constituent releasing components 25.
• the tobacco constituent releasing components maybe located in a cavity within the filter.
• the cavity may, for example, be a cavity section positioned between two (or more) adjacent filter plugs or the cavity may be a pocket defined within a filter plug.
• the tobacco constituent releasing components maybe small in size, for example in the form of granules.
• larger, monolithic tobacco constituent releasing components are incorporated into a filter.
• a single tobacco constituent releasing component may be embedded in a fibrous filter plug material.
• FIG. 21 shows a smoking article 21 comprising a filter 22 and a cylindrical rod of smokeable material 23, wherein the filter 22 comprises a tobacco constituent releasing component 26 which is surrounded by filter material 24.
• the tobacco constituent releasing component may be incorporated into a multi-segment filter, the tobacco constituent releasing component itself making up one of the filter segments.
• the tobacco constituent releasing component may have any shape or size, but it may be advantageous for the component to a have a cylindrical shape and the dimensions similar to or compatible with those of the filter segments.
• the tobacco constituent releasing component may be surrounded by filter material such as a layer of fibrous filter tow, to form a filter segment.
• the tobacco constituent releasing component may have the dimensions of a filter plug and it maybe incorporated into a filter with one or more adjacent filter plugs.
• a tobacco constituent releasing component maybe included in a cavity section positioned between two (or more) adjacent filter plugs.
• a smoking article 21 comprises a filter 22 and a cylindrical rod of smokeable material 23, wherein the filter 22 is made up of multiple filter segments. There is a filter segment 27 positioned at the mouth end of the filter and a filter segment 28 positioned at the tobacco rod end of the filter. Positioned between these filter segments, which comprise filter material 24, is a tobacco constituent releasing component 26.
• the filters and filter elements of the present invention may, in some embodiments, further comprise additives.
• the additive may be particles of adsorbent material, including, for example, activated carbon, an ion exchange resin, such as CR20, zeolite, silica gel, meerschaum, aluminium oxide (activated or not),
• magnesium silicate including Sepiolite (Mg 4 Si 6 0 5 (0H) 2 -6H 2 0) and combinations thereof.
• the tobacco constituent releasing component is positioned downstream of the adsorbent.

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