EP3949771A1 - Rauchartikel mit erwärmung ohne verbrennung, verfahren zur verwendung davon und rauchsystem mit erwärmung ohne verbrennung - Google Patents

Rauchartikel mit erwärmung ohne verbrennung, verfahren zur verwendung davon und rauchsystem mit erwärmung ohne verbrennung Download PDF

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Publication number
EP3949771A1
EP3949771A1 EP19922962.6A EP19922962A EP3949771A1 EP 3949771 A1 EP3949771 A1 EP 3949771A1 EP 19922962 A EP19922962 A EP 19922962A EP 3949771 A1 EP3949771 A1 EP 3949771A1
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EP
European Patent Office
Prior art keywords
heat
smoking article
filter
tobacco
burn smoking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19922962.6A
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English (en)
French (fr)
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EP3949771A4 (de
EP3949771B1 (de
Inventor
Nobuyuki Ishikawa
Kosuke Ota
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Japan Tobacco Inc
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Japan Tobacco Inc
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Publication date
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Publication of EP3949771A4 publication Critical patent/EP3949771A4/de
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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
    • A24B13/00—Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • the present invention relates to a heat-not-burn smoking article, a method of using the smoking article, and a heat-not-burn smoking system.
  • a heat-not-burn smoking article that utilizes heating instead of combustion has been developed in recent years (Patent Literature (PTL) 1, for example).
  • PTL Patent Literature 1
  • a tobacco filler contains, in addition to tobacco, an aerosol former for generating an aerosol upon heating.
  • an aerosol is also inhaled together with a smoking flavor component.
  • the tobacco filler is typically heated at a temperature exceeding 230°C.
  • cellulose, hemicellulose, lignin, and so forth contained in tobacco undergo thermal decomposition to form various thermal decomposition products, thereby yielding a complex smoking flavor.
  • an aerosol when passing through a filter disposed downstream of the tobacco filler, an aerosol is subjected to mechanical filtration of aerosol particles (hereinafter, also referred to as "mechanical filtration"), in which aerosol particles are filtered through physical contact with a filter, as well as to trapping of a smoking flavor component through adsorption (hereinafter, also referred to as “adsorption filtration”), in which a smoking flavor component gas volatilized from aerosol particles is trapped through adsorption onto a filter surface. Consequently, filtration of a smoking flavor component through a filter increases without supplying a sufficient amount of the smoking flavor component to a user.
  • An object of the present invention is to provide a heat-not-burn smoking article in which filtration of a smoking flavor component through a filter is reduced even in use at a heating temperature of 230°C or lower.
  • a heat-not-burn smoking article according to the present invention includes
  • a method of using a heat-not-burn smoking article according to the present invention includes heating to 230°C or lower the tobacco filler of the heat-not-burn smoking article according to the present invention.
  • a heat-not-burn smoking system includes
  • a heat-not-burn smoking article includes a tobacco filler containing tobacco and an aerosol former; and a filter disposed downstream of the tobacco filler.
  • the tobacco filler is a tobacco filler that provides an aerosol having a pH of 7.8 or less.
  • the present inventors found possible, by setting the aerosol pH to 7.8 or less, to reduce filtration of a smoking flavor component through a filter and to supply a sufficient amount of the smoking flavor component to a user even when a heat-not-burn smoking article is used at a heating temperature of 230°C or lower.
  • the tobacco filler provides an aerosol having a pH of 7.8 or less.
  • an aerosol solution within aerosol particles is acidic and forms acid-base bonds with a basic smoking flavor component, such as nicotine. Consequently, the volatility of the smoking flavor component contained in aerosol particles decreases and the smoking flavor component tends to remain within aerosol particles. Accordingly, even when the heat-not-burn smoking article is used at a heating temperature of 230°C or lower, it is possible to reduce adsorption filtration of a smoking flavor component gas and, as a result, to reduce filtration of the smoking flavor component through a filter.
  • the pH of an aerosol generated from the tobacco filler is 7.8 or less, preferably 7.5 or less, more preferably 7.3 or less, and further preferably 7.0 or less.
  • the lower limit of the aerosol pH range is not particularly limited and may be 4.0 or greater since the aerosol pH is typically 4.0 or greater even when all the components contained in a tobacco filler have migrated into the aerosol.
  • the term "aerosol” encompasses aerosol particles containing a smoking flavor component derived from tobacco as well as a gas surrounding the aerosol particles.
  • the "pH of an aerosol” indicates the pH of a solution obtained by directly collecting, in an impinger added with 10 mL of ultrapure water, 10 to 15 mg of an aerosol at 30°C or lower before passing through a filter.
  • the configuration of the heat-not-burn smoking article according to the present invention is not particularly limited provided that a tobacco filler and a filter disposed downstream of the tobacco filler are included.
  • the heat-not-burn smoking article according to the present invention may be, for example, a heat-not-burn smoking article according to the first or the second embodiment described hereinafter.
  • the tobacco filler according to the present invention is not particularly limited as long as tobacco and an aerosol former are contained and an aerosol having a pH of 7.8 or less is provided.
  • the tobacco filler preferably further contains an organic acid.
  • the tobacco filler may further contain a volatile flavor component, water, and so forth.
  • the tobacco filler may be a tobacco filler that can generate, for example, an aerosol containing a smoking flavor component having an amino group, where the amino group forms a salt at 230°C or lower.
  • the types of tobacco may be blended as appropriate for an intended taste and used.
  • the details of the types of tobacco are disclosed in " Tobacco no Jiten (Dictionary of Tobacco), Tobacco Academic Studies Center, March 31, 2009 .”
  • oriental or flue-cured varieties are preferable for the tobacco.
  • the tobacco preferably includes at least one of an oriental variety and a flue-cured variety.
  • Oriental and flue-cured varieties reduce migration of basic substances into aerosol particles due to the low nitrogen content and can lower the pH of an aerosol due to the high content of organic acids or the like.
  • the tobacco contains at least one of an oriental variety and a flue-cured variety at preferably 50 mass% or more, more preferably 60 mass% or more, further preferably 70 mass% or more, and particularly preferably 100 mass%, which means that the tobacco consists of at least one of an oriental variety and a flue-cured variety.
  • Exemplary sections to be used include leaves (shreds), stalks, stems, veins (shreds), roots, and flowers.
  • the form of tobacco is not particularly limited, and any form, such as tobacco shreds, regenerated sheets, or dust, is applicable to the filler.
  • dry tobacco leaves shredded into a width of 0.8 to 1.2 mm may be used.
  • the shreds have a length of about 5 to 20 mm
  • those prepared by uniformly pulverizing dry tobacco leaves into an average particle size of about 20 to 200 ⁇ m, forming into sheets, and shredding the sheets into a width of 0.8 to 1.2 mm may also be used.
  • the shreds have a length of about 5 to 20 mm
  • the above-mentioned formed sheets may be gathered without shredding and used as a filler.
  • a plurality of cylindrically formed sheets may be arranged concentrically.
  • Such sheets include a sheet made by a papermaking process; a cast sheet made by uniformly mixing with a suitable solvent, such as water, thinly casting the resulting uniform mixture on a metal sheet or a metal sheet belt, and drying; and a rolled sheet formed by extruding a uniform mixture with a suitable solvent, such as water, into a sheet shape.
  • a suitable solvent such as water
  • the content of tobacco in the tobacco filler is not particularly limited but is preferably 20 to 90 mass%, more preferably 50 to 90 mass%, and further preferably 70 to 90 mass% relative to 100 mass% of the tobacco filler.
  • the content is 20 mass% or more, a sufficient amount of a smoking flavor component can be supplied. Meanwhile, when the content is 90 mass% or less, other components excluding tobacco can be included in appropriate amounts.
  • the aerosol former is not particularly limited provided that an aerosol can be generated upon heating, and examples include polyhydric alcohols, such as glycerol, propylene glycol, triethylene glycol, tetraethylene glycol, and 1,3-butanediol; aliphatic carboxylic acid esters, such as methyl stearate, dimethyl dodecanedioate, and dimethyl tetradecanedioate; triethyl citrate; and triacetin. These may be used alone or in combination. As the concentration of generated aerosol particles is lower, a smoking flavor component volatilizes more readily from an aerosol. For this reason, the present technique is particularly effective for glycerol, which is a former having a low amount of volatilization at a heating temperature of 230°C or lower.
  • the content of an aerosol former in the tobacco filler is not particularly limited but is preferably 10 to 90 mass%, more preferably 10 to 50 mass%, and further preferably 10 to 30 mass% relative to 100 mass% of the tobacco filler.
  • the content is 10 mass% or more, a sufficient amount of an aerosol can be generated and supplied. Meanwhile, when the content is 90 mass% or less, other components excluding an aerosol former can be included in appropriate amounts.
  • the tobacco filler according to the present invention preferably further contains an organic acid.
  • an organic acid is a second organic acid to be added to the tobacco filler unlike an organic acid (first organic acid) contained in tobacco.
  • the organic acid may be an edible organic acid and is not particularly limited provided that the pH of an aerosol can be lowered to 7.8 or less. Examples include levulinic acid and benzoic acid. These may be used alone or in combination.
  • the boiling point of the organic acid is preferably 300°C or lower, more preferably 280°C or lower, and further preferably 250°C or lower.
  • the organic acid readily volatilizes even when a heat-not-burn smoking article is used at a heating temperature of 230°C or lower, thereby increasing the amount of the organic acid contained in aerosol particles. Consequently, the pH of an aerosol can be lowered further.
  • the lower limit of the boiling point range of the organic acid is not particularly limited and may be 150°C or higher, for example.
  • the "boiling point" in the present invention indicates a boiling point at a pressure of 760 mmHg and is a value measured through distillation, for example.
  • the organic acid preferably has a first acid dissociation constant of preferably 4.0 to 5.0, more preferably 4.1 to 4.8, and further preferably 4.2 to 4.5.
  • first acid dissociation constant of 4.0 to 5.0
  • the organic acid tends to undergo acid-base reactions with a basic smoking flavor component within aerosol particles, thereby forming salts further readily. For this reason, the volatility of the smoking flavor component contained in aerosol particles is lowered further. Consequently, it possible to further reduce filtration of the smoking flavor component through a filter.
  • first acid dissociation constant indicates an acid dissociation constant in water at 25°C and is a value measured, for example, by acid-base titration, absorption spectroscopy, or capillary electrophoresis.
  • a product of a value of the boiling point (°C) of the organic acid and a value of the first acid dissociation constant of the organic acid is preferably 1,000 to 1,200, more preferably 1,020 to 1,150, and further preferably 1,040 to 1,100.
  • the product value is 1,000 to 1,200, the volatility of the organic acid at a heating temperature of 230°C or lower and the acid strength suitable for acid-base reactions with a smoking flavor component are well balanced. Consequently, it is possible to further lower the volatility of a smoking flavor component contained in aerosol particles and thus to further reduce filtration of the smoking flavor component through a filter.
  • the organic acid is preferably solid at 25°C.
  • the organic acid can exist within aerosol particles in a stable manner due to the low volatility. Consequently, it is possible to further lower the pH of an aerosol.
  • the organic acid is preferably soluble in the aerosol former at 25°C.
  • the organic acid can exist uniformly within aerosol particles and can effectively attain the bonded state with a smoking flavor component. Consequently, it is possible to further lower the volatility of the smoking flavor component contained in aerosol particles and thus to further reduce filtration of the smoking flavor component through a filter.
  • whether an organic acid is soluble in an aerosol former at 25°C is determined by adding 10 mg of the organic acid to 1,000 mg of the aerosol former at 25°C, stirring, and visually checking the solubility.
  • the organic acid is determined as "soluble." Since a solution of a polyol, such as glycerol, is difficult to measure at room temperature due to the high viscosity, it is desirable to observe the solution after appropriately dissolving once at a high temperature, followed by cooling to room temperature.
  • a polyol such as glycerol
  • the content of the organic acid (second organic acid) in the tobacco filler is not particularly limited provided that the pH of an aerosol is 7.8 or less. Although different depending on the type or the like of an organic acid, the content may be 0.1 to 20 mass% or may also be 0.5 to 10 mass% relative to 100 mass% of the tobacco filler, for example.
  • the tobacco filler according to the present invention may contain, as necessary, a volatile flavor component from a viewpoint of imparting a smoking flavor.
  • the volatile flavor component is not particularly limited and examples include, from a viewpoint of imparting a satisfactory smoking flavor, acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peru balsam oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, ⁇ -carotene, carrot juice, L-carvone, ⁇ -caryophyllene, cas
  • the content of the volatile flavor component in the tobacco filler is not particularly limited but may be, from a viewpoint of imparting a satisfactory smoking flavor, typically 10,000 to 50,000 ppm and preferably 20,000 to 40,000 ppm based on the mass of the tobacco filler.
  • the filling density of the tobacco filler is not particularly limited but is typically 250 to 520 mg/cm 3 and preferably 320 to 420 mg/cm 3 from a viewpoint of ensuring the performance of a heat-not-burn smoking article and imparting a satisfactory smoking flavor.
  • the filter according to the present invention is not particularly limited provided that the filter acts as a filter and is disposed downstream (mouth end side in aerosol flow) of the tobacco filler.
  • Exemplary materials of the filter include cellulose, such as cellulose acetate, polypropylene, poly lactic acid, and paper primarily made of pulp. These may be used alone or in combination.
  • As the filter an acetate filter containing cellulose acetate is preferable.
  • the filter has a resistance to draw of preferably 250 to 450 mmH 2 O/120 mm, more preferably 270 to 430 mmH 2 O/120 mm, and further preferably 300 to 400 mmH 2 O/120 mm
  • the filter has a resistance to draw of 250 mmH 2 O/120 mm or more, mechanical filtration of aerosol particles through the filter increases while correspondingly and relatively reducing the ratio of a smoking flavor component gas subjected to adsorption filtration. Consequently, the amount of a smoking flavor component contained in each aerosol particle increases.
  • the filter has a resistance to draw of 450 mmH 2 O/120 mm or less, filtration of aerosol particles per se can be reduced while increasing the amount of aerosol particles supplied to a user.
  • the filter has a resistance to draw within the range of 250 to 450 mmH 2 O/120 mm, the amount of a smoking flavor component contained in each aerosol particle and the amount of aerosol particles supplied to a user are balanced, thereby imparting a sufficient smoking flavor.
  • the resistance to draw of the filter can be changed appropriately by the materials of the filter, the amount to be filled, and so forth.
  • the resistance to draw of a filter is a value measured as a pressure difference of air at room temperature (22°C) and 1.05 L/min of air.
  • the amount of a plasticizer contained in the filter is preferably 9.0 mass% or less relative to 100 mass% of the filter.
  • a filter is generally added with a plasticizer.
  • a plasticizer typically exhibits high affinity with a smoking flavor component and thus promotes adsorption filtration of a smoking flavor component gas through the filter.
  • the amount of a plasticizer contained in the filter is more preferably 6.0 mass% or less, further preferably 3.0 mass% or less, and particularly preferably 0.0 mass%, which means that the filter does not contain any plasticizer.
  • Exemplary plasticizers include, but are not particularly limited to, triacetin and phthalate esters. These may be used alone or in combination. Among these, the plasticizer is preferably triacetin since filtration of a smoking flavor component through the filter can be reduced further effectively.
  • the amount of a humectant contained in the filter is preferably 9.0 mass% or less relative to 100 mass% of the filter.
  • a filter is added with a humectant in some cases.
  • many humectants are typically hydrophilic, exhibit high affinity with a smoking flavor component, and thus promote adsorption filtration of a smoking flavor component gas through the filter.
  • the amount of a humectant contained in the filter is more preferably 6.0 mass% or less, further preferably 3.0 mass% or less, and particularly preferably 0.0 mass%, which means that the filter does not contain any humectant.
  • humectants include, but are not particularly limited to, propylene glycol, glycerol, and 1,3-butanediol. These may be used alone or in combination. Among these, the humectant is preferably propylene glycol since filtration of a smoking flavor component through the filter can be reduced further effectively.
  • the cross-sectional shape of the filter on the plane perpendicular to the flow direction of an aerosol (axial direction) is not particularly limited and may be circular, elliptic, or polygonal, for example.
  • the perimeter length of the filter is not particularly limited but is preferably 17 to 27 mm and more preferably 20 to 25 mm in view of resistance to draw to be exhibited and manufacturing feasibility.
  • the length of the filter in the flow direction of an aerosol (axial direction) is not particularly limited and may be 4 to 10 mm, for example.
  • the filter may be provided with a hole for introducing diluent air.
  • the heating temperature of the tobacco filler is 230°C or lower, preferably 220°C or lower, more preferably 200°C or lower, and further preferably 180°C or lower.
  • the lower limit of the heating temperature range of the tobacco filler is not particularly limited and may be, for example, 22°C or higher or may also be 100°C or higher.
  • the "heating temperature" indicates the highest temperature of the tobacco filler itself and indicates, for example, the highest temperature measured by inserting a thermocouple into the tobacco filler.
  • Fig. 1 is a cross-sectional view of a heat-not-burn smoking article according to the first embodiment of the present invention.
  • the cylindrical heat-not-burn smoking article 100 illustrated in Fig. 1 includes a battery 101, a tobacco filler 102, a pod 103 that holds the tobacco filler 102, a heater 104 that can heat the pod 103, a mouthpiece 105, and a filter 106.
  • Heat generated at the heater 104 by the power supplied from the battery 101 is transferred to the tobacco filler 102 inside the pod 103 to vaporize, by the heat, a smoking flavor component and an aerosol former contained in the tobacco filler 102.
  • An aerosol containing the generated smoking flavor component is supplied to a user through the mouthpiece 105 and the filter 106.
  • Fig. 2 is a cross-sectional view of a heat-not-burn smoking article according to the second embodiment of the present invention.
  • the cylindrical heat-not-burn smoking article 200 illustrated in Fig. 2 includes a tobacco-containing segment 201 and a mouthpiece segment 202.
  • the mouthpiece segment 202 includes a cooling segment 203, a center hole segment 204, and a filter segment 205.
  • the tobacco-containing segment 201 including a tobacco filler 206 is heated to vaporize a smoking flavor component and an aerosol former contained in the tobacco filler 206.
  • An aerosol contacting the generated smoking flavor component is supplied to a user through the cooling segment 203, the center hole segment 204, and the filter segment 205 that includes a filter 212.
  • the positions of the cooling segment 203 and the center hole segment 204 may be switched, and the positions of the center hole segment 204 and the filter segment 205 may also be switched.
  • the mouthpiece segment 202 may lack the center hole segment 204.
  • the tobacco-containing segment 201 includes the tobacco filler 206 and a tubular wrapper 207 that covers the tobacco filler 206.
  • a method of packing the tobacco filler 206 within the wrapper 207 is not particularly limited.
  • the tobacco filler 206 may be wrapped in the wrapper 207 or the tubular wrapper 207 may be filled with the tobacco filler 206.
  • tobacco may be packed with the longitudinal direction randomly aligned within the wrapper 207 or may be packed with the longitudinal direction aligned with the axial direction or the direction perpendicular to the axial direction of the tobacco-containing segment 201.
  • a smoking flavor component and an aerosol former contained in the tobacco filler 206 are vaporized by heating the tobacco-containing segment 201 and moved to the mouthpiece segment 202 through inhalation.
  • the cooling segment 203 comprises a tubular member 208.
  • the tubular member 208 may be a paper tube of cylindrically processed cardboard, for example.
  • the tubular member 208 and a mouthpiece lining paper 215 described hereinafter are provided with a perforation 209 passing therethrough. Due to the presence of the perforation 209, external air is introduced inside the cooling segment 203 during inhalation. Consequently, a vaporized aerosol component generated through heating of the tobacco-containing segment 201 comes into contact with external air and liquefies due to the lowering temperature, thereby forming an aerosol containing aerosol particles.
  • the size (diameter) of the perforation 209 is not particularly limited and may be 0.5 to 1.5 mm, for example.
  • the number of the perforation 209 is also not particularly limited and may be one or two or more. For example, a plurality of perforations 209 may be provided on the perimeter of the cooling segment 203.
  • the center hole segment 204 comprises a filling layer 210 having a hollow portion and a first inner plug wrapper 211 that covers the filling layer 210.
  • the center hole segment 204 acts to increase the strength of the mouthpiece segment 202.
  • the filling layer 210 may be, for example, a rod highly densely filled with cellulose acetate fibers. Since the filling layer 210 has a high filling density of fibers, an aerosol flows only through the hollow portion and hardly flows within the filling layer 210 during inhalation. Since the filling layer 210 inside the center hole segment 204 is a fiber-filled layer, a user rarely feels odd by touch from the outside during use.
  • the center hole segment 204 may lack the first inner plug wrapper 211 and retain its shape through thermoforming.
  • the filter segment 205 comprises the filter 212 and a second inner plug wrapper 213 that covers the filter 212. Since the filter 212 is present all the way up to the end in the filter segment 205, the end has an appearance similar to a common combustion smoking article.
  • the center hole segment 204 and the filter segment 205 are joined with an outer plug wrapper 214.
  • the outer plug wrapper 214 may be a cylindrical paper, for example.
  • the tobacco-containing segment 201, the cooling segment 203, and the connected center hole segment 204 and filter segment 205 are joined with the mouthpiece lining paper 215.
  • These three segments may be joined, for example, by applying a glue, such as a vinyl acetate-based glue, to the inner surface of the mouthpiece lining paper 215 and wrapping the lining paper around these segments.
  • a glue such as a vinyl acetate-based glue
  • the method of using a heat-not-burn smoking article according to the present invention includes heating to 230°C or lower the tobacco filler of the heat-not-burn smoking article according to the present invention.
  • the heating temperature of the tobacco filler is 230°C or lower
  • thermal decomposition of components contained in tobacco occurs only marginally, thereby reducing the amount of thermal decomposition products incorporated into aerosol particles.
  • the volatility of aerosol particles as well as the volatility of a smoking flavor component contained in aerosol particles increase.
  • adsorption filtration of a smoking flavor component gas occurs through the filter, in addition to mechanical filtration of aerosol particles.
  • the method according to the present invention can reduce adsorption filtration of the smoking flavor component gas. Consequently, it is possible to reduce filtration of a smoking flavor component through the filter even in use at a heating temperature of 230°C or lower.
  • the method of using a heat-not-burn smoking article according to the present invention is not particularly limited in modes except for heating to 230°C or lower the tobacco filler of the heat-not-burn smoking article according to the present invention.
  • the heating temperature of the tobacco filler is 230°C or lower, preferably 220°C or lower, more preferably 200°C or lower, and further preferably 180°C or lower.
  • the lower limit of the heating temperature range of the tobacco filler is not particularly limited and may be, for example, 22°C or higher or may also be 100°C or higher.
  • a heat-not-burn smoking system includes the heat-not-burn smoking article according to the present invention; and a heating device for heating the tobacco filler. Since the heat-not-burn smoking article according to the present invention is included, the heat-not-burn smoking system can reduce filtration of a smoking flavor component through a filter even when the tobacco filler is heated to 230°C or lower by the heating device.
  • the heat-not-burn smoking system according to the present invention is not particularly limited provided that the heat-not-burn smoking article according to the present invention and the heating device are included and may have other configurations.
  • the heat-not-burn smoking system according to the present invention is applicable, for example, to a case in which a heat-not-burn smoking article lacks a heating mechanism for heating the tobacco filler.
  • the heat-not-burn smoking system is applicable to the heat-not-burn smoking article according the second embodiment.
  • the heat-not-burn smoking system illustrated in Fig. 3 includes the heat-not-burn smoking article 300 according to the second embodiment and a heating device 301 for heating a tobacco-containing segment of the heat-not-burn smoking article 300 from the outside.
  • Fig. 3 (a) illustrates the state before inserting the heat-not-burn smoking article 300 into the heating device 301
  • the heating device 301 illustrated in Fig. 3 includes a body 302, a heater 303, a metal tube 304, a battery unit 305, and a control unit 306.
  • the body 302 has a tubular recess 307, and the heater 303 and the metal tube 304 are arranged on the inner side surface of the recess 307 at a position corresponding to the tobacco-containing segment of the heat-not-burn smoking article 300 inserted into the recess 307.
  • the heater 303 may be an electric resistance heater, and heating by the heater 303 is performed by supplying power from the battery unit 305 in accordance with instructions from the control unit 306, which controls temperature.
  • Heat generated by the heater 303 is transferred to the tobacco-containing segment of the heat-not-burn smoking article 300 through the metal tube 304 having a high thermal conductivity.
  • a gap exists between the outer perimeter of the heat-not-burn smoking article 300 and the inner perimeter of the metal tube 304.
  • the heating device 301 heats the tobacco-containing segment of the heat-not-burn smoking article 300 from the outside, the heating device may be a heating device for heating from the inside.
  • the heating temperature of the tobacco filler by the heating device is 230°C or lower, preferably 220°C or lower, more preferably 200°C or lower, and further preferably 180°C or lower.
  • the lower limit of the heating temperature range of the tobacco filler is not particularly limited and may be, for example, 22°C or higher or may also be 100°C or higher.
  • a tobacco filler sample was prepared by adding 100 mg of glycerol as an aerosol former to 100 mg of tobacco shreds consisting of 50 mg of a burley variety (Japan) and 50 mg of a flue-cured variety (Japan), followed by mixing.
  • tobacco shreds those having a sieve opening diameter of 0.5 mm or less obtained by pulverizing dry tobacco leaves in advance using a mixer for home use and by shaking with a sieve (trade name: AS200, from Retsch GmbH) at an amplitude of 1.5 mm/g for 2 minutes were used.
  • the tobacco filler sample was placed by attaching to a pod designed for a heat-not-burn smoking article illustrated in Fig. 1 (refer to Japanese Unexamined Patent Application Publication No. 2014-76065 ) and stored under conditions of 22°C and 60% humidity for 2 days or more. Later, the pod was mounted to a heating device of the heat-not-burn smoking article, and a smoking test was performed. Specifically, a smoking machine (trade name: RM-26, from Borgwaldt) was connected to the mouth end of the heat-not-burn smoking article, and the sample inside the pod was preheated by the heating device for 2 minutes. The heating temperature of the tobacco filler (during stable operation) was confirmed to be about 160°C to 170°C through prior measurement using a thermocouple.
  • a smoking machine trade name: RM-26, from Borgwaldt
  • easily measureable nicotine was selected as a representative smoking flavor component.
  • low-volatile glycerol was selected as an indicator component of filtration.
  • Components trapped by the acetate filter and components collected by the Cambridge pad were quantified using a GC-FID after subjecting to shaking extraction with methanol solvent for 40 minutes.
  • an indicator of increase in filtration represented by the following formula (2) was used as an indicator of filtration.
  • Indicator of increase in filtration filtration ratio of nicotine % / filtration ratio of glycerol %
  • glycerol Due to the low vapor pressure, it is presumed that glycerol mostly exists in the particle phase after vaporization upon heating. Accordingly, mechanical filtration is predominant as the trapping mechanism inside the filter.
  • mechanical filtration of aerosol particles containing nicotine is predominant while hardly causing adsorption filtration, in which nicotine gas component is adsorbed onto the filter surface or pores.
  • the filtration ratio of nicotine is comparable to the filtration ratio of glycerol to yield the indicator of increase in filtration of about 1.
  • adsorption filtration in which nicotine gas component volatilized from aerosol particles is adsorbed onto the filter surface or pores, occurs in addition to mechanical filtration of the aerosol particles containing nicotine.
  • the filtration ratio of nicotine is greater than the filtration ratio of glycerol to yield the indicator of increase in filtration of significantly greater than 1.
  • Table 2 and Fig. 4 described hereinafter it is revealed that the indicator of increase in filtration correlates with the smoking flavor grade and that a user intensely senses a smoking flavor component at the indicator of increase in filtration of 1.35 or less. Accordingly, it was considered that filtration of a smoking flavor component through the filter is significantly reduced to supply a sufficient amount of the smoking flavor component to a user when the indicator of increase in filtration is 1.35 or less.
  • the pH of an aerosol was measured, using a pH meter (trade name: LAQUA, from Horiba, Ltd.), as the pH of a solution obtained by directly collecting, in an impinger added with 10 mL of ultrapure water, 10 to 15 mg of the aerosol at 30°C or lower before passing through a filter.
  • a pH meter trade name: LAQUA, from Horiba, Ltd.
  • Each tobacco filler sample was prepared in the same manner as Example 1 except for changing the type and amount of tobacco as shown in Table 1, and the filtration ratios of nicotine and glycerol, the indicator of increase in filtration, and the aerosol pH were measured and assessed. The results are shown in Table 1.
  • Table 1 Tobacco type and amount Filtration ratio of nicotine (%) Filtration ratio of glycerol (%) Indicator of increase in filtration (-) Aerosol pH (-) Ex. 1 Burley (Japan) 50 mg Flue-cured (Japan) 50 mg 51.3 46.2 1.10 7.61 Ex. 2 Burley (Japan) 50 mg Oriental (Turkey) 50 mg 40.7 34.7 1.18 7.79 Ex.
  • Examples 1 to 9 in which the aerosol pH is 7.8 or less, exhibit the indicator of increase in filtration of 1.35 or less and thus significantly reduce filtration of a smoking flavor component through the filter while supplying a sufficient amount of the smoking flavor component to a user.
  • Comparative Examples 1 to 4 in which the aerosol pH exceeds 7.8, exhibit the indicator of increase in filtration exceeding 1.35 and thus increase filtration of a smoking flavor component through the filter.
  • adsorption filtration in which a smoking flavor component gas volatilized from aerosol particles is trapped through adsorption onto a filter surface, readily occurs through the filter in addition to mechanical filtration of aerosol particles.
  • a tobacco filler sample was prepared by adding 100 mg of glycerol as an aerosol former and 10 mg of levulinic acid as an organic acid to 100 mg of tobacco shreds of a burley variety (Japan), followed by mixing. Otherwise, the filtration ratios of nicotine and glycerol, the indicator of increase in filtration, and the aerosol pH were measured and assessed in the same manner as Example 1. Moreover, the solubility of an acid (organic acid, inorganic acid) in glycerol and the effects on a smoking flavor were evaluated by the following methods. The results are shown in Table 2.
  • Smoking was performed by five panelists under the same conditions as the above-described evaluation of filtration through a filter, and sensory evaluation of the effects on a smoking flavor was made by 7 grades from 1 to 7 (1: sensed not at all, 7: extremely intense). The average of the evaluation by the five panelists was regarded as smoking flavor grade.
  • smoking flavor grade herein represents a sensory evaluation result including the overall taste and flavor derived from leaf tobacco.
  • Each tobacco filler sample was prepared in the same manner as Example 10 except for changing the acid (organic acid, inorganic acid) as shown in Table 2.
  • the indicator of increase in filtration and the aerosol pH were measured, and the solubility of an acid in glycerol and the effects on a smoking flavor were evaluated.
  • the results are shown in Table 2 together with, as a reference, the results of Comparative Example 1, which is not added with an acid.
  • Examples 10 and 11 in which the aerosol pH was lowered to 7.8 or less by adding levulinic acid or benzoic acid as an organic acid, exhibit the indicator of increase in filtration of 1.35 or less, significantly reduced filtration of a smoking flavor component through the filter, and an intense smoking flavor. It is considered possible to have lowered the aerosol pH to 7.8 or less since levulinic acid and benzoic acid have the boiling point of 300°C or lower, the first acid dissociation constant of 4.0 to 5.0, the product of the value of the boiling point (°C) and the value of the first acid dissociation constant of 1,000 to 1,200 as well as are soluble in glycerol as an aerosol former and are solid at 25°C.
  • Comparative Examples 1 and 5 to 8 to which no acid, nonadecanoic acid, phosphoric acid, pyruvic acid, or adipic acid was added, exhibit the aerosol pH exceeding 7.8, the indicator of increase in filtration exceeding 1.35, and a weak smoking flavor. It is considered that these acids were ineffective since the boiling point, the first acid dissociation constant, and/or the product of the value of the boiling point (°C) and the value of the first acid dissociation constant fall outside the above-mentioned ranges; or these acids are less soluble in glycerol or are not solid at 25°C.
  • Fig. 5 shows a graph plotting the relationship between aerosol pH and indicator of increase in filtration in Examples 1 to 11 as well as Comparative Examples 1 to 8. Fig. 5 reveals that the aerosol pH and the indicator of increase in filtration are highly correlated.
  • acetate filter having a resistance to draw of 176 mmH 2 O/120 mm, triacetin content of 9.0 mass%, and a circumference of 24.1 mm was used as a filter. Triacetin was added to the filter by feeding, as a spot, triacetin to the inner center of the filter using a microsyringe and allowing to stand still for 1 hour or more. Except for this, the filtration ratios of nicotine and glycerol and the indicator of increase in filtration were measured and assessed in the same manner as Example 1 (aerosol pH: 7.61). In this example, as an indicator of the ratio of smoking flavor components contained in aerosol particles, the indicator of the smoking flavor content represented by the following formula (3) was used.
  • a tobacco filler sample was prepared in the same manner as Comparative Example 1.
  • the sample was placed within a pod designed for the heat-not-burn smoking article illustrated in Fig. 1 by attaching to the bottom of the pod, on which a ventilation hole (5 mm ⁇ ) had been made, and was stored under conditions of 22°C and 60% humidity for 2 days or more.
  • the pod 600 was heated using the heating device 602 having the ceramic heater 601 (4.0 mm ⁇ ) at the heating temperature of the tobacco filler (not illustrated) inside the pod 600 of 175°C.
  • the ceramic heater 601 having the heating section 603 was placed inside the jig 604 made of SUS, and the heating device 602 was provided with holes 605 (0.5 mm ⁇ ) as ventilation holes.
  • the heating temperature of the tobacco filler was checked using a thermocouple, and the output of the heating device 602 was adjusted such that the temperature of the tobacco filler became the set temperature (175°C). At this heating temperature, filtration through a filter was evaluated in the same manner as Example 1. The results are shown in Table 4.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Tobacco Products (AREA)
EP19922962.6A 2019-03-29 2019-03-29 Rauchartikel mit erwärmung ohne verbrennung, verfahren zur verwendung davon und rauchsystem mit erwärmung ohne verbrennung Active EP3949771B1 (de)

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KR20240000552A (ko) * 2021-04-26 2024-01-02 니뽄 다바코 산교 가부시키가이샤 비연소 가열형 향미 흡인기용 담배 시트, 비연소 가열형 향미 흡인기, 및 비연소 가열형 향미 흡인 시스템
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CN113349413B (zh) * 2021-07-13 2022-08-02 云南中烟工业有限责任公司 一种应用于加热卷烟能增香减害的低温馏分的制备方法及其在加热卷烟中的用途
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