US20160286851A1 - Smoking composition comprising flavour precursor - Google Patents

Smoking composition comprising flavour precursor Download PDF

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Publication number
US20160286851A1
US20160286851A1 US15/035,545 US201415035545A US2016286851A1 US 20160286851 A1 US20160286851 A1 US 20160286851A1 US 201415035545 A US201415035545 A US 201415035545A US 2016286851 A1 US2016286851 A1 US 2016286851A1
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United States
Prior art keywords
flavour
smoking article
precursor compound
article according
smoking
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Abandoned
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US15/035,545
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English (en)
Inventor
Jan Carlos Hufnagel
Anneke Glabasnia
Flavie Aramendy
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Philip Morris Products SA
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Philip Morris Products SA
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Priority to US15/035,545 priority Critical patent/US20160286851A1/en
Assigned to PHILIP MORRIS PRODUCTS S.A. reassignment PHILIP MORRIS PRODUCTS S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUFNAGEL, Jan Carlos, ARAMENDY, Flavie, GLABASNIA, ANNEKE
Publication of US20160286851A1 publication Critical patent/US20160286851A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/302—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by natural substances obtained from animals or plants
    • A24B15/303—Plant extracts other than tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
    • A24B15/302—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by natural substances obtained from animals or plants
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • 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
    • A24D1/22—Cigarettes with integrated combustible heat sources, e.g. with carbonaceous heat sources
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means
    • A24F47/004—
    • A24F47/006—

Definitions

  • This disclosure relates to smoking compositions having enhanced sensory components, and articles and methods related to such smoking compositions.
  • Smoking articles that heat tobacco or other sources of nicotine, without combustion of the tobacco or nicotine source, have been proposed. Such articles generate aerosols that can deliver nicotine and other tobacco constituents to a user. However, a user may perceive significantly different flavour notes from those experienced with conventional smoking articles such as cigarettes.
  • flavour compounds into tobacco or other sources of nicotine that are used in non-combustion smoking articles to better approximate an experience associated with smoking a conventional cigarette.
  • a variety of flavour compounds are known for addition to tobacco products.
  • the volatility of such compounds presents challenges for incorporating the compounds into tobacco or smoking articles. For example, losses may occur during production or storage due to the volatility of the compounds.
  • smoking articles in which the tobacco or other source of nicotine is heated but not combusted, deliver to a user an aerosol containing a flavour to provide the user with an experience similar to that of smoking a conventional cigarette.
  • the articles contain a flavour composition that includes a flavour precursor, which does not have a significant odour.
  • the flavour precursor converts into one or more flavour compounds or intermediates for flavour compounds upon heating to produce flavour notes that provide the composition with a profile more closely resembling that of conventional cigarettes.
  • Smoking articles described herein may provide one or more advantages.
  • the smoking articles described herein provide an enhanced flavour experience relative to smoking articles that do not include a flavour precursor.
  • the flavour precursors described herein release flavour compounds or intermediates of flavour compounds comprising a thiol group.
  • Thiol-containing flavour compounds or intermediates such as hydrogen sulfide, methanethiol, and furfurylthiol, are more volatile than the flavour precursor compounds. Because the flavour precursors are not volatile or are less volatile than the flavour compounds, losses during production may be mitigated and the articles may have a longer shelf life. Further, because the flavour precursor compounds are less odourous than the flavour compounds, the article does not impart substantial sulfur notes when it is not in use.
  • thiol means a compound of the formula RSH, where R is H or an organic group.
  • thiol-containing flavour compound and “flavour compound” mean a thiol-containing flavour compound that is released from the flavour precursor compound or that is generated from the reaction of a thiol-containing intermediate with an aerosol forming substrate.
  • thiol-containing intermediate and “intermediate” mean any thiol-containing compound that is released from the flavour precursor compound and that can react with an aerosol forming substrate, such as tobacco or other nicotine source to generate a thiol-containing flavour compound.
  • the thiol-containing flavour compound or intermediate is a compound that is more volatile than the flavour precursor compound.
  • the flavour compound has flavour properties that enhance the experience of non-combustible smoking articles to, for example, provide an experience more similar to that resulting from smoking a combustible smoking article.
  • the flavour compound can enhance flavour properties such as complexity and mouth fullness. Complexity is generally known as the overall balance of the flavour being richer without dominating single sensory attributes. Mouth fullness is described as perception of richness and volume in the mouth and throat of the smoke.
  • the released or generated thiol-containing flavour compounds may provide one or more of these or other flavour properties.
  • the released or generated thiol-containing flavour compound is selected from the group consisting of hydrogen sulfide, methanethiol, 3-methyl-2-butene-1-thiol and furfurylthiol. Hydrogen sulphide and methanethiol are particularly preferred for their generation of flavour notes particularly associated with tobacco smoke.
  • any suitable test may be employed to determine whether the thiol-containing flavour compound produces a flavour component that is typically perceptible with smoking of cigarettes.
  • a compound that invokes a subjective perception of a flavour note, associated with smoking of cigarettes would be considered to have or to produce a flavour for purposes of the present disclosure.
  • trained flavourists may determine whether a flavour compound is released or generated on heating a flavour precursor compound, such as in the presence of an aerosol forming compound during smoking of a non-combustible smoking article.
  • randomly or non-randomly selected people may be chosen to determine whether they perceive the compound to produce a flavour. By way of example, if 25% or more, e.g., 50% or more, 60% or more, 70% or more, or 80% or more of the selected people perceive a flavour, the compound will be determined to be flavour producing.
  • flavour precursor compound has a structure of Formula I, as follows:
  • R 1 is OH or an amino acid residue
  • R 2 is H, C(O)CH 3 , or an amino acid residue
  • R 3 is H or C1-C3 unsubstituted alkyl
  • R 4 is optional and, if present, is C1-C3 unsubstituted alkyl
  • x is an integer from 1 to 3.
  • R 1 is preferably OH or a glycine residue.
  • R 2 is preferably H, C(O)CH 3 , or a glutamate residue.
  • R 3 is preferably H or CH 3 .
  • R 4 is preferably CH 3 , if present, to produce a positively charged sulfur species.
  • R 4 is not present.
  • X is preferably 1 or 2.
  • flavour precursor compound has a structure of Formula II, as follows:
  • R 1 is OH or an amino acid residue
  • R 2 is H, C(O)CH 3 , or an amino acid residue
  • R 3 is H, C1-C3 unsubstituted alkyl or an amino acid residue
  • x is an integer from 1 to 3.
  • R 1 is preferably OH or a glycine residue.
  • R 2 is preferably H, C(O)CH 3 , or a glutamate residue.
  • R 3 is preferably H, CH 3 or a cysteine residue.
  • X is preferably 1 or 2.
  • flavour precursor compound has a structure of Formula Ill, as follows:
  • R 1 is OH or an amino acid residue
  • R 2 is H, C(O)CH 3 , or an amino acid residue
  • x is an integer from 1 to 3.
  • R 1 is preferably OH or a glycine residue.
  • R 2 is preferably H, C(O)CH 3 or a glutamate residue.
  • X is preferably 1 or 2.
  • flavour precursor compound has a structure of Formula IV, as follows:
  • R 1 is OH or an amino acid residue
  • R 2 is H, C(O)CH 3 , or an amino acid residue.
  • R 1 is preferably OH or a glycine residue.
  • R 2 is preferably H, C(O)CH 3 , or a glutamate residue.
  • an amino acid residue may be bound to the core structure via a peptide bond or via a suitable side chain, such as a carboxylic acid group.
  • the flavour precursor compound is a compound selected from the group consisting of cysteine (CAS No. 3374-33-9), cysteine (CAS No. 56-89-3), glutathione (CAS No. 70-18-8), methionine (CAS No. 59-51-8), DL methionine methylsulfonium (CAS No. 582174), N-acetyl cysteine (CAS No. 616-91-1), S-methyl cysteine (CAS No. 1187-84-4), DL-homocyceteine (CAS No. 454-29-5), N-acetyl methionine (CAS No. 65-82-7), Farnesyl-Met-Ome (CAS No. 218962-72-2), albumin (CAS No. 9006-59-1) and 2-hydroxy-4-(methylthio)butyric acid (CAS No. 922-50-9).
  • cysteine CAS No. 3374-33-9
  • cysteine CAS No. 56-89-3
  • glutathione CAS No. 70-18
  • Disclosure of a compound herein refers to the particular disclosed compound, as well as suitable salts, polymorphs, isomers, etc. thereof.
  • the flavour precursor compound is a compound comprising a cysteine residue.
  • cysteine examples include cysteine, glutathione, N-acetyl cysteine, S-methyl cysteine, and cysteine.
  • the flavour precursor compound is cysteine or glutathione. More preferably, the flavour precursor compound is cysteine.
  • a flavour composition is a composition comprising a flavour precursor compound and a further compound typically used in flavour compositions, for example.
  • the composition may comprise one or more flavour compounds known in the art, which include but are not limited to, menthol, spearmint, peppermint, eucalyptus, vanilla, cocoa, chocolate, coffee, tea, spices (such as cinnamon, clove and ginger), fruit extracts, and combinations thereof.
  • the flavour composition further comprises menthol or eugenol.
  • Such flavourants are commonly used to provide a refreshing flavour to the smoke of a smoking article.
  • the composition may also comprise adjuvants that allow the composition to meet technical requirements, such as stability or tonality persistence.
  • a delivery system may be provided, which encapsulates a flavour composition or flavour precursor compound.
  • the delivery system protects the flavour composition or flavour precursor compound during manufacture and upon storage.
  • a delivery system may take any suitable form which is capable of retaining the flavour composition or flavour precursor compound within the structure of the system until the release is desired.
  • the delivery system comprises a closed matrix or network structure, which traps the flavour precursor compound within the closed structure.
  • the flavour composition or precursor may be trapped in domains within a matrix structure.
  • the delivery system comprises a polymer matrix comprising one or more matrix-forming polymers.
  • the gradual breakdown of the polymer matrix with increasing compressive force, temperature, or both provides the controlled release of the flavour precursor compound from the delivery system.
  • the release of the flavour precursor compound can thus vary as a function of temperature or the deformation resulting from the compressive or shear force that is applied to the delivery system.
  • the delivery system may advantageously be provided within smoking articles in a variety of different forms so that there is flexibility in the way in which the composition or precursor can be incorporated into the smoking article.
  • the delivery system is provided in the form of particles, beads or capsules.
  • the particles, beads or capsules may be formed into any suitable shape, but are preferably substantially cylindrical or spherical.
  • flavour precursor is synthesized or purified prior to its addition to the flavour composition or flavour delivery composition.
  • a flavour precursor compound, as described above, may be included in a smoking composition in any suitable manner and in any suitable amount.
  • the term “smoking composition” is used to describe a composition that produces an aerosol when it is heated, and is used to make a smoking article.
  • the term “smoking article” includes articles that heat the smoking composition directly or indirectly, or smoking articles that neither combust nor heat the smoking composition, but rather use air flow or a chemical reaction to deliver nicotine, a flavour compound or other materials from the tobacco or other nicotine source.
  • the term “smoke” is used to describe an aerosol produced by a smoking article.
  • An aerosol produced by a smoking article may be, for example, produced by non-combustible smoking articles, such as heated smoking articles or non-heated smoking articles.
  • a flavour delivery system can controllably release a flavour precursor compound to its surrounding environment by any suitable methods, for example by deformation of the flavour delivery system or by changing the temperature.
  • the amount of flavour precursor compound released over a time interval, as well as the start or end of the interval(s) can be controlled.
  • the amount of flavour precursor compound released during each interval and the length of time intervals need not be equal.
  • a smoking composition of the invention comprises a flavor precursor compound or a flavor composition, the composition or precursor optionally being provided as part of a delivery system.
  • a smoking composition may comprise, for example, one or more of: powder, granules, pellets, shreds, strips or sheets comprising one or more of: herb leaf, tobacco leaf, tobacco stems, fragments of tobacco ribs, homogenized tobacco, reconstituted tobacco, processed tobacco, extruded tobacco and expanded tobacco.
  • the smoking composition may be in loose form, or may be provided in a suitable container or cartridge.
  • the smoking composition may be contained within a paper or wrap and have the form of a plug.
  • Smoking articles that include aerosol-generating devices typically comprise an aerosol-forming substrate that is assembled, often with other components, in the form of a rod.
  • a rod is configured in shape and size to be inserted into an aerosol-generating device that comprises a heating element for heating the aerosol-forming substrate.
  • “Aerosol-forming substrate” as used herein is a type of smoking composition that can be used in an aerosol-generating device to produce an aerosol.
  • the aerosol-forming substrate can release a flavor compound upon heating.
  • the aerosol-forming substrate can be in solid form or liquid form.
  • the substrate can comprise both liquid and solid components.
  • the aerosol-forming substrate may comprise tobacco and a flavour composition wherein a flavor precursor compound or a disassociated flavor compound is released from the substrate upon heating.
  • the aerosol-forming substrate does not include tobacco, but does include a flavor composition wherein a flavor precursor compound as described herein or a disassociated flavor compound is released from the substrate upon heating, and optionally nicotine.
  • the aerosol-forming substrate may further comprise an aerosol former.
  • the aerosol-forming substrate may be provided on or embedded in a carrier which may take the form of powder, granules, pellets, shreds, spaghetti strands, strips or sheets.
  • the aerosol-forming substrate may be deposited on the surface of the carrier in the form of, for example, a sheet, foam, gel or slurry.
  • the aerosol-forming substrate may be deposited on the entire surface of the carrier, or alternatively, may be deposited in a pattern in order to provide a non-uniform flavor delivery during use.
  • Smoking articles may comprise a filter which may be a single segment filter or a multi-component filter comprising two or more connected or unconnected filter segments. Any suitable filter or filter segment may be included in a smoking article described herein. One or more of the filter segments may each comprise a flavor precursor compound or a flavor composition, the precursor or composition optionally being provided in a delivery system. Smoking articles may be packaged in containers for sale, for example in soft packs or hinge-lid packs, with an inner liner coated or impregnated with a flavor compound, a flavor composition or a delivery system.
  • a smoking composition comprising a flavor precursor compound or a flavor composition, the precursor or composition optionally being provided in a delivery system, can be manufactured using any suitable technique.
  • a flavour composition comprising a flavour precursor compound
  • the flavor precursor compound may be added to a liquid carrier to form a mixture, such as solution, suspension or slurry, and the slurry can be applied onto the tobacco.
  • Slurries comprising the flavor precursor compound can include any liquid or liquid mixtures suitable for dispersing and dispensing (e.g., spraying) particles comprising the flavor precursor compound.
  • a preferred liquid is water (e.g., deionized water), though other liquids, such as alcohols, can be used.
  • tobacco may be dipped in a solution, suspension or dispersion comprising the flavour precursor.
  • a solid such as a powder or crystals comprising the flavour precursor may be added to tobacco.
  • the smoking composition can then be processed for use in a smoking article.
  • the flavor precursor compound may be added to cut filler tobacco stock supplied to a cigarette-making machine or applied to a pre-formed tobacco column prior to wrapping a cigarette wrapper around the tobacco column.
  • the concentration of a flavor precursor compound in the slurry can be any amount suitable for dispensing the slurry onto tobacco.
  • Slurries comprising a dispersion of a flavor precursor compound in a liquid can comprise from about 0.01 to about 2% by weight of a flavor precursor compound.
  • the flavor precursor compound can be provided in the form of a dried powder and applied to tobacco as such. If dried powder is used, it can be dusted onto tobacco.
  • Another technique for incorporating the flavor precursor compound in a tobacco smoking composition involves adding the flavor precursor compound to a slurry of ingredients used to make reconstituted tobacco.
  • the slurry, including the flavor precursor compound can be formed into a reconstituted tobacco sheet and the sheet can be cut to shreds for incorporation as cut filler of a rod of smoking composition or other forms of smoking article.
  • Homogenized tobacco can also be used to make aerosol-forming substrate for use in smoking articles that are being heated in an aerosol-generating device.
  • the term “homogenized tobacco” denotes a material formed by agglomerating particulate tobacco. Tobacco dust created by tobacco breakage during shipping and manufacturing, leaf lamina, stems and other tobacco by-products that are finely ground may be mixed with a binder to agglomerate the particulate tobacco.
  • Homogenized tobacco may comprise other additives in addition to a flavor precursor or flavour composition, including but not limited to, aerosol-formers, plasticisers, humectants, and non-tobacco fibers, fillers, aqueous and non-aqueous solvents and combinations thereof.
  • Homogenized tobacco can be cast, extruded, or rolled.
  • a number of reconstitution processes for producing homogenized tobacco materials are known in the art. These include, but are not limited to: paper-making processes of the type described in, for example, U.S. Pat. No. 5,724,998; casting processes of the type described in, for example, U.S. Pat No. 5,724,998; dough reconstitution processes of the type described in, for example, U.S. Pat. No. 3,894,544; and extrusion processes of the type described in, for example, in GB983,928.
  • aerosol-forming substrates may have different shapes and sizes depending upon, for example, the type of smoking article in which they are intended to be used. Aerosol-forming substrates may be substantially three-dimensional. For example, aerosol-forming substrates may be bricks or plugs comprising a plurality of strands of homogenized tobacco material. Alternatively, aerosol-generating substrates may be substantially two-dimensional. For example, aerosol-generating substrates may be mats or sheets comprising a plurality of strands of homogenized tobacco.
  • the amount of flavour precursor compound desired in a smoking composition may vary depending on the final product in which the smoking composition is to be included.
  • the flavour precursor compound may be added to tobacco to enhance the flavour or aroma of conventional smoking articles, such as cigarettes, cigars, and the like.
  • flavour precursor compounds that release flavour compounds having similar flavour qualities may be added in relatively low concentrations or amounts.
  • Smoking articles having tobacco-containing aerosol-forming substrates for use with an aerosol-generating device typically provide flavour characteristics that differ from those of combustible smoking articles. It may also be desirable to include higher concentrations or amounts of flavour compounds to smoking compositions that do not include tobacco, such as non-tobacco containing aerosol-forming substrates.
  • the flavour precursor compounds are included in the smoking composition for use in smoking articles in amounts that provide a user with a perceived note similar to a combustible smoking article, such as a cigarette.
  • the flavour precursor may be included in a non-combustion smoking article or a smoking article that does not include tobacco in an amount that results in the release or delivery of the flavour compound in a concentration or amount similar to that delivered to a user of a conventional smoking article such as a cigarette.
  • the amount of flavour compound delivered to a user may be determined on a per puff basis. Any suitable method may be used to determine the amount of flavour compound delivered per puff. For example, ISO, Health Canada Intense, or other standard or automated procedures may be employed or modified to determine content per puff.
  • ISO methods examples include: (i) ISO 4387:1991 Cigarettes—Determination of total and nicotine free dry matter using a routine analytical smoking machine, 1991-10-15; (ii) ISO 8454:1995 Cigarettes—Determination of carbon monoxide in the vapour phase of cigarette smoke—NDIR method, 1991-11-15; (iii) ISO 10315:1991 Cigarettes—Determination of nicotine in smoke condensates—Gas-chromatographic method, 1991-08-01; and (iv) ISO 10362-1:1991 Cigarettes—Determination of water in smoke condensates—Part 1: Gas-chromatographic method, 1991-09-15.
  • the Health Canada Intensive method refers to: Health Canada—Official Method T-115, Determination of “Tar”, Nicotine and Carbon Monoxide in Mainstream Tobacco Smoke, December 1999. Regardless of the method employed, it may be desirable to determine the amount of a flavour compound that is delivered per puff of a conventional cigarette and formulate a non-conventional smoking article that aerosolizes tobacco or other constituents without combustion so that it delivers similar amounts of the flavour compound per puff. The amount of flavour precursor compound added to a smoking composition for such articles may be varied and tested to determine how much flavour precursor is needed to deliver a similar amount of the flavour compound.
  • a smoking article is configured to deliver about 5 nanograms or more of the flavour compound per puff.
  • a smoking article is configured to deliver from about 10 nanograms of the flavour compound per puff to 1 milligram of the flavour compound per puff, such as from about 50 nanograms per puff to about 750 nanograms per puff or from about 75 nanograms per puff to about 500 nanograms per puff.
  • the amount of flavour precursor compound added to a smoking composition to deliver a desired amount of disassociated flavour compound to a user will depend on the components and configuration of the article and the flavour precursor compound.
  • a flavour precursor may be added to a smoking composition in any suitable amount or concentration.
  • a smoking composition comprises 0.001 weight % or greater, based on the total weight of tobacco, of the flavour precursor compound.
  • a smoking composition includes 0.005 weight % or greater of the flavour precursor compound.
  • a smoking composition includes 0.01 weight % or less of the flavour precursor compound.
  • a smoking composition includes from about 0.001 weight % to about 2 weight % of the flavour precursor compound, such as from about 0.005 weight % to about 1 weight % of the flavour precursor compound or from about 0.01 weight % to about 0.25 weight % of the flavour precursor compound.
  • the flavour precursor compound may be added to tobacco at any suitable time, such as before or during processing of the tobacco for incorporation into a smoking article or the like.
  • the flavour precursor compound is stable (that is, the flavour compound is not released or generated) under such processing.
  • one or more flavour precursor compounds is dissolved in a food grade solvent and then applied to a tobacco substrate or other suitable substrate in concentrations up to 1000 ppm.
  • the substrate may then be equilibrated at room temperature to a humidity of approximately 60% for at least 48 hours.
  • the compounds can be added directly as solid material to any available food grade solvent system required in the process.
  • the compound can be applied as a solution, suspension, etc. created as described above.
  • the concentration to the substrate during generation may reach 1% of the total dry weight.
  • the reconstitution of tobacco is performed by drying and casting homogeneous slurry of tobacco powder, water, glycerin, binder and cellulose fibres.
  • This type of process is known as cast leaf process and is widely used by the tobacco industry for the manufacturing of reconstituted or homogenized tobacco for use in conventional cigarette.
  • a cast leaf process may involve applying temperatures of up to about 140° C., such as between about 90° C. and about 140° C. Accordingly, if the smoking composition that includes the flavour precursor compound is to be manufactured in a cast leaf process, the flavour precursor compound is preferably stable at such temperatures.
  • the flavour precursor compound releases the flavour compound or the intermediate under general use conditions of the article in which the flavour precursor compound is incorporated.
  • smoking articles that heat, but do not combust, tobacco to aerosolize tobacco constituents typically heat the tobacco at about 200° C. to about 450° C.
  • the flavour precursor compound preferably releases the flavour compound at a temperature from about 200° C. to about 450° C. when a smoking composition having the flavour precursor compound is included in such articles.
  • combustion of tobacco typically occurs at a temperature of about 450° C.
  • the flavour precursor compound preferably releases the flavour compound at a temperature below about 450° C. when a tobacco composition having the flavour precursor compound is included in combustible smoking articles such as cigarette or cigars.
  • the flavour precursor compound releases the flavour compound at a temperature of about 150° C. or greater. In embodiments, the flavour precursor compound releases the flavour compound at a temperature of about 450° C. or less. In embodiments, the flavour precursor compound releases the flavour compound at a temperature of from about 100° C. to about 450° C., such as from about 150° C. to about 450° C. or from about 200° C. to about 450° C.
  • Tobacco compositions refer to smoking compositions that include tobacco and a flavour precursor.
  • the tobacco composition may be used in combustible smoking articles or non-combustible smoking articles in which an aerosol-forming substrate is used.
  • the tobacco composition can be reconstituted tobacco containing various tobacco types of different origins, as well as binders and humectants.
  • the humectants facilitate the production of an aerosol. When heated, the humectants evaporate and re-condense into small droplets to generate a visible aerosol.
  • the flavour precursor composition releases the flavour compound under use conditions, but not under storage, processing, or manufacturing conditions.
  • the smoking composition may be used in any portion of the smoking article having a tobacco substrate, for example in the tobacco rod of a conventional cigarette, or in one or more segments of the filter of a conventional cigarette.
  • the smoking composition may be used in any portion of the smoking article having an aerosol-forming substrate.
  • the smoking article 102 includes a combustible heat source 104 , an aerosol-forming substrate 106 , an elongate expansion chamber 108 and a mouthpiece 110 in abutting coaxial alignment, which are overwrapped in an outer wrapper of cigarette paper 112 of low air permeability.
  • the combustible heat-source 104 is a pyrolised porous carbon-based heat source.
  • the combustible heat source 104 is cylindrical and comprises a central airflow channel 116 that extends longitudinally through the combustible heat source 104 .
  • a substantially air impermeable, heat resistant coating 114 of iron oxide is provided on the inner surface of the central airflow channel 116 .
  • the aerosol-forming substrate 106 is located immediately downstream of the combustible heat source 104 and comprises a cylindrical plug of homogenised tobacco material 118 comprising a flavor precursor compound and glycerine as aerosol former and circumscribed by filter plug wrap 120 .
  • the homogenized tobacco material 118 consists of longitudinally aligned filaments of extruded tobacco material.
  • a heat-conducting element 122 consisting of a tube of aluminum foil surrounds and is in contact with a rear portion of the combustible heat source 104 and an abutting front portion of the aerosol-generating substrate 106 . As shown in FIG. 1 , a rear portion of the aerosol-generating substrate 106 is not surrounded by the heat-conducting element 122 .
  • the elongate expansion chamber 108 is located downstream of the aerosol-generating substrate 106 and comprises a cylindrical open-ended tube of cardboard 124 .
  • the mouthpiece 110 of the smoking article 102 is located downstream of the expansion chamber 108 and comprises a cylindrical plug of cellulose acetate tow 126 of very low filtration efficiency circumscribed by filter plug wrap 128 .
  • the mouthpiece 110 may be circumscribed by tipping paper (not shown).
  • the dimensions of the smoking article 102 may be similar to a conventional cigarette.
  • a user ignites the combustible carbon-based heat source 4 and then draws air through the central airflow channel 116 downstream towards the mouthpiece 110 .
  • the front portion of the aerosol-generating substrate 106 is heated primarily by conduction through the abutting non-combusting rear portion of the combustible heat source 104 and the heat-conducting element 122 .
  • the drawn air is heated as it passes through the central airflow channel 116 and then heats the aerosol-forming substrate 106 by convection.
  • the heating of the aerosol-forming substrate 106 releases volatile and semi-volatile compounds, including the disassociated flavor compound, and glycerine from the aerosol forming substrate 118 , which are entrained in the heated drawn air as it flows through the aerosol-forming substrate.
  • the heated air and entrained compounds pass downstream through the expansion chamber 108 , cool and condense to form an aerosol that passes through the mouthpiece into the mouth of the user (at about ambient temperature).
  • a rectangular piece of the heat-conducting element 122 is glued to cigarette paper 112 .
  • the heat source 104 , the plug of the aerosol-forming substrate 106 and the expansion chamber 108 are suitably aligned and positioned on the cigarette paper 112 with the attached heat-conducting element 122 .
  • the cigarette paper 112 with the attached heat-conducting element 122 is wrapped around the rear portion of the heat source 104 , the aerosol-generating substrate 106 and the expansion chamber 108 and glued.
  • the mouthpiece 110 is attached to the open end of the expansion chamber using known filter combining technology.
  • the smoking composition comprising the flavor precursor compound is brought into direct contact with a heat source that is not combusted, such as an electrical heat source.
  • FIG. 2 shows a smoking article that is heated by an electrical heat source when engaged with a device for consumption.
  • the smoking article 101 comprises a front-plug 103 , an aerosol-forming substrate 111 , a hollow cellulose acetate tube 109 , a transfer section 107 , and a mouthpiece filter 105 . These five elements are arranged sequentially and in coaxial alignment and are assembled by a cigarette paper 115 to form a rod.
  • the rod has a mouth-end, which a user inserts into his or her mouth during use, and a distal end located at the opposite end of the rod to the mouth end. When assembled, the rod is 52 mm long and has a diameter of 7.2 mm.
  • the front-plug 103 is a cylindrical portion of cellulose acetate tow.
  • the aerosol-forming substrate 111 is located downstream of the front-plug 103 and comprises a bundle of crimped cast-leaf tobacco wrapped in a filter paper.
  • the cast-leaf tobacco includes additives, including glycerine as an aerosol former.
  • the tube 109 is located immediately downstream of the aerosol-forming substrate 111 and is formed from cellulose acetate.
  • the transfer section 107 allows volatile substances including the flavor compound released from the aerosol-forming substrate 111 to pass along the rod towards the mouth end.
  • the volatile substances may cool within the transfer section 107 to form an aerosol.
  • the mouthpiece filter 105 is a conventional mouthpiece filter formed from cellulose acetate tow. The elements identified above are assembled by being tightly wrapped within a cigarette paper 115 .
  • the aerosol-generating device 119 comprises a sheath 121 for receiving the smoking article 101 for consumption.
  • a heating element 113 is located within the sheath 121 and positioned to engage with the distal end of the smoking article 101 .
  • the heating element 113 is shaped in the form of a blade terminating in a point. As the smoking article 101 is pushed into the sheath the point of the heating element 113 engages first with the front-plug 103 and then penetrates into the aerosol-forming substrate 111 . When the smoking article 101 is properly engaged with the aerosol-generating device 119 , the heating element 113 is located within the aerosol-forming substrate 111 .
  • Heat generated by the heating element 113 is transferred by conduction and convection to the aerosol-forming substrate 111 which comprises the flavor precursor compound.
  • An insulating collar 117 may surround a portion of the heating element 113 that is in contact with and protect the front-plug 103 from burning or melting.
  • a method for making a smoking article having a smoking composition that includes a flavor precursor compound includes adding or incorporating the flavor precursor compound or a flavor delivery composition into a smoking composition, such as tobacco or other substrate; and incorporating the smoking composition into a smoking article.
  • a method for enhancing flavor of a smoking composition comprises adding a flavor precursor compound, optionally encapsulated in a delivery system, to the smoking composition.
  • the flavor precursor compound releases or dissociates a flavor compound or intermediate upon heating.
  • release and “dissociate” are used interchangeably.
  • the heating of the flavor precursor compound occurs when a smoking article is used (combusted or heated) by a smoker.
  • non-volatile sulfur compounds as shown in table 1, are screened by (ATD) GC-MS on a cellulose filter to determine whether and how much hydrogen sulfide and methanethiol they release upon heating.
  • the compounds are also added to non-combusted smoking articles to assess the change in sensory attributes of such compounds during aerosolisation of such articles in the presence and absence of the compounds.
  • non-volatile sulfur compounds are also applied to a blended tobacco by syringe injection and used for non-combusted smoking substrates.
  • the tobacco with the non-volatile sulfur compounds is formed into sticks and equilibrated for at least 12 hours prior to assessment.
  • the ortho-nasal impact of the selected compounds is evaluated in different concentrations on global aroma by usage of the smoke simulator in pushing mode. Selected compounds are then selected for sensory testing.
  • Non-volatile sulfur compounds non-volatile thiol-containing compounds CAS No. category Cysteine 3374-33-9 amino acid Cystin 56-89-3 amino acid derivate Glutathione 70-18-8 natural antioxidant in cells Methionine 59-51-8 amino acid DL-Methionine 582174 amino acid derivate methylsulfonium chloride N-Acetyl L-cysteine 616-91-1 amino acid derivate S-methyl L-cysteine 1187-84-4 amino acid derivate DL-Homocysteine 454-29-5 amino acid derivate N-Acetyl L-methionine 65-82-7 amino acid derivate Farnesyl-Met-Ome 218962-72-2 amino acid derivate Egg albumin 9006-59-1 sulfur rich protein 2-Hydroxy-4- 922-50-9 non-amino acid sulfur source (methylthio)butyric acid Ca salt
  • Aqueous solutions are prepared according to table 2. Additionally 1:10 and 1:100 dilutions are prepared for validation.
  • ATD-GC-MS parameters Value tube temperature 250° C. trap temperature ⁇ 40° C. temperature gradient 99° C. per second to 275° C. desorption time 5 min N 2 pressure 170 kPa; constant
  • Smoking evaluation is performed for concepts showing preference in ortho-nasal evaluation. Smoking evaluation is performed by comparison of untreated blend versus treated concept

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  • Botany (AREA)
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PT3071057T (pt) 2017-12-21
ZA201602268B (en) 2017-06-28
PH12016500588A1 (en) 2016-06-13
AU2014351398B2 (en) 2018-08-09
UA117836C2 (uk) 2018-10-10
CN105744848B (zh) 2018-11-16
CA2928020A1 (en) 2015-05-28
IL245494B (en) 2019-12-31
MX2016006506A (es) 2016-08-04
JP2017500002A (ja) 2017-01-05
HK1223249A1 (en) 2017-07-28
JP6682430B2 (ja) 2020-04-15
EP3071057A1 (en) 2016-09-28
KR102289549B1 (ko) 2021-08-17
BR112016008829A2 (enrdf_load_stackoverflow) 2017-08-01
PL3071057T3 (pl) 2018-02-28
KR20160086822A (ko) 2016-07-20
IL245494A0 (en) 2016-06-30
CN105744848A (zh) 2016-07-06
WO2015075650A1 (en) 2015-05-28
ES2645338T3 (es) 2017-12-05
EP3071057B1 (en) 2017-10-04
BR112016008829B1 (pt) 2022-03-08
MY180432A (en) 2020-11-28
US20230284673A1 (en) 2023-09-14
PH12016500588B1 (en) 2019-08-30
AU2014351398A1 (en) 2016-04-28

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