EP4340643A1 - Milieu de tabac et article générateur d'aérosol comprenant celui-ci - Google Patents

Milieu de tabac et article générateur d'aérosol comprenant celui-ci

Info

Publication number
EP4340643A1
EP4340643A1 EP22804889.8A EP22804889A EP4340643A1 EP 4340643 A1 EP4340643 A1 EP 4340643A1 EP 22804889 A EP22804889 A EP 22804889A EP 4340643 A1 EP4340643 A1 EP 4340643A1
Authority
EP
European Patent Office
Prior art keywords
tobacco
nicotine
medium
aerosol
generating article
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.)
Pending
Application number
EP22804889.8A
Other languages
German (de)
English (en)
Inventor
Hyeon Tae Kim
Jun Won Shin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KT&G Corp
Original Assignee
KT&G Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020210064852A external-priority patent/KR102676406B1/ko
Application filed by KT&G Corp filed Critical KT&G Corp
Publication of EP4340643A1 publication Critical patent/EP4340643A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • A24B13/02—Flakes or shreds of 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
    • 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
    • A24B15/186—Treatment of tobacco products or tobacco substitutes by coating with a coating composition, encapsulation of tobacco particles
    • 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
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices

Definitions

  • This description relates to a tobacco medium including a tobacco material, and to an aerosol-generating article including the tobacco medium.
  • non-combustible cigarettes e.g., heat-not-burn cigarettes
  • tobacco leaves are heated with a temperature of about 800 °C to 850 °C.
  • non-combustible cigarettes e.g., heat-not-burn cigarettes
  • non-combustible cigarettes may generate an aerosol at relatively low temperatures.
  • non-combustible cigarettes may be heated by a device at a temperature of about 280 °C to 350 °C to generate an aerosol.
  • Non-combustible cigarettes can be classified into heating type cigarettes and non-heating type cigarettes, and in both types of cigarettes, it is important to facilitate nicotine transfer at lower temperatures. Specifically, in non-heating type cigarettes, it should be possible to smoothly transfer nicotine without raising a temperature, Even in heating type cigarettes, nicotine transfer at relatively lower temperatures should be facilitated to minimize device size and battery consumption.
  • nicotine in the tobacco material exists in a salt state and is difficult to vaporize at low temperatures, nicotine may be alkalized so that it can be smoothly provided to users in the form of free-base nicotine.
  • Patent Document 1 KR10-1851091 B
  • off-flavor may increase and the storability of the nicotine in the tobacco raw material decreases due to the volatilization of the free-base nicotine that is a result of alkalinization.
  • An object of an embodiment of the present invention is to provide a tobacco medium capable of increasing an amount of nicotine transfer even at a low temperature and a low pH.
  • a tobacco medium includes a pulverized tobacco material and a pH adjuster, wherein the tobacco medium includes at least 70 wt% of the pulverized tobacco material on a dry weight basis, the pulverized tobacco material includes at least 4 wt% of nicotine on a dry weight basis, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis, and a PH of the tobacco medium is in the range of 6 to 9.
  • the tobacco medium includes a pulverized tobacco material and a pH adjuster, wherein the tobacco medium includes at least 70 wt% of the pulverized tobacco material on a dry weight basis, the pulverized tobacco material includes at least 4 wt% of nicotine on a dry weight basis, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis, and a pH of the tobacco medium is between 6 and 9.
  • a tobacco medium that can smoothly transfer nicotine, reduce off-flavor caused by alkalinization, and reduce a nicotine loss rate during storage, even at a relatively low temperature and a low pH without additional nicotine salt supplementation.
  • Figure 1 is a diagram illustrating an aerosol-generating article according to an embodiment of the present invention.
  • FIG. 2 schematically shows an embodiment in which a tobacco medium is a granular medium of a core-shell structure according to an embodiment of the present invention.
  • a tobacco medium includes a pulverized tobacco material and a pH adjuster, wherein the tobacco medium includes at least 70 wt% of the pulverized tobacco material on a dry weight basis, the pulverized tobacco material includes at least 4 wt% of nicotine on a dry weight basis, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis, and a PH of the tobacco medium is in the rage of 6 to 9.
  • the tobacco medium may be included in a non-combustible aerosol-generating article.
  • the heating temperature of the article may be 30 °C to 180 °C.
  • the tobacco medium may be manufactured in a form of reconstituted tobacco leaves or granules.
  • the form of granule may be a structure including a core and a shell surrounding the core.
  • the tobacco medium may further include a coating layer on an outside of the reconstituted tobacco leaves or granules.
  • the coating layer may include pores.
  • a tobacco medium includes a pulverized tobacco material and a pH adjuster, wherein the tobacco medium includes at least 70 wt% of the pulverized tobacco material on a dry weight basis, the pulverized tobacco material includes at least 4 wt% of nicotine on a dry weight basis, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis, and a pH of the tobacco medium is in the range of 6 to 9.
  • the tobacco medium includes a pulverized tobacco material and a pH adjuster, wherein the tobacco medium includes at least 70 wt% of the pulverized tobacco material on a dry weight basis, the pulverized tobacco material includes at least 4 wt% of nicotine on a dry weight basis, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis, and a pH of the tobacco medium is in the range of 6 to 9.
  • the aerosol-generating article may generate an aerosol without combustion when heated at a heating temperature.
  • the heating temperature of the article may be in the range of 30 °C to 180 °C.
  • the present invention relates to a tobacco medium included in an aerosol-generating article, and specifically to a tobacco medium included in a non-combustible aerosol-generating article.
  • a "non-combustible aerosol-generating article” may refer to a non-combustible cigarette (or non-combustible cigarette article) that generates an aerosol without combustion.
  • the non-combustible aerosol-generating article may be a heating type aerosol-generating article or a non-heating type aerosol-generating article.
  • the heating type aerosol-generating article may be an article that generates an aerosol by using hot air heated by electrical energy, and a user may smoke by inhaling the aerosol released from the article.
  • an aerosol-generating article may include a medium portion and a filter portion, and the medium portion may include a tobacco medium.
  • the non-combustible aerosol-generating article of the present invention may provide sufficient nicotine without off-flavor even at a low temperature (e.g., 30 °C to 180 °C).
  • Figure 1 is a diagram for explaining an aerosol-generating article according to an embodiment of the present invention.
  • an aerosol-generating article 100 may include a tobacco rod 110 and a filter rod 120.
  • the filter rod 120 may be composed of a single segment or a plurality of segments.
  • the filter rod 120 may include a first segment for cooling the aerosol and a second segment for filtering a predetermined component included in the aerosol. If necessary, the filter rod 120 may additionally include more segments that perform other functions.
  • the tobacco rod 110 and the filter rod 120 may be wrapped by one or more wrappers 130. At least one hole through which external air flows or internal gas flows may be formed in the wrapper 130.
  • the tobacco rod 110 may be packaged by a first wrapper and the filter rod 120 may be packaged by a second wrapper. Then, the tobacco rod 110 and the filter rod 120 wrapped by individual wrappers are coupled, and the entire cigarette can be repackaged by a third wrapper.
  • the filter rod 120 is composed of a plurality of segments as described above, the segments may be wrapped by respective wrappers, and then the entire cigarette may be repackaged by another wrapper.
  • a "tobacco medium” may refer to an aerosol-generating material that releases volatile compounds upon heating.
  • the tobacco medium may include tobacco materials having nicotine, such as pH adjusters, leaf tobacco, and may additionally include excipients such as binders or other additives.
  • the tobacco medium of the present invention may include a pulverized tobacco material and a pH adjuster.
  • the tobacco medium may be prepared in the form of granules, reconstituted tobacco leaves or the like including tobacco materials and excipients.
  • the "tobacco material” may refer to a material forming an aerosol-generating substrate, and may be tobacco leaf pieces, tobacco stems, tobacco dust generated during tobacco processing, and/or a strip of main leaf blade of tobacco leaves.
  • Tobacco leaf may be at least one selected from flue-cured, burley, oriental, cigar leaf, and toast, but is not limited thereto.
  • the "pH adjuster” may serve to alkalize nicotine in a salt state present in a tobacco material to convert it to free-base nicotine. Since nicotine in salt state is difficult to vaporize or aerosolize at a low temperature, nicotine can be alkalized through the pH adjuster to be converted into a form of free-base nicotine and transferred to a user.
  • the tobacco medium may include a pulverized tobacco material and a pH adjuster.
  • the tobacco medium may include at least 70 wt% of a pulverized tobacco material on a dry weight basis, and the pulverized tobacco material may include at least 4 wt% of nicotine on a dry weight basis. That is, the tobacco medium includes at least 2.8 wt% of nicotine on a dry weight basis.
  • the pH of the tobacco medium may be in the range of 6 to 9.
  • the tobacco medium alkalinizes the tobacco material through the pH adjuster, thereby converting nicotine present in a salt state into free-base nicotine.
  • vapor pressure may be increased, and thus nicotine transfer is facilitated even under relatively low temperature conditions.
  • an amount of nicotine transfer may be increased at a relatively low temperature by using the tobacco medium described above.
  • the tobacco medium may be filled in a non-combustible aerosol-generating article, and the non-combustible aerosol-generating article may be heated by a device at a heating temperature of 30 °C to 180 °C.
  • the tobacco medium according to an embodiment may transfer a sufficient amount of nicotine while minimizing nicotine loss and off-flavor during storage at a heating temperature much lower than that of a general heating type aerosol-generating device.
  • the tobacco material according to an embodiment may include a relatively high nicotine content, and thus a sufficient amount of free-base nicotine can be provided even at a relatively low temperature.
  • the tobacco material of the present invention can be useful in a non-heating type aerosol-generating article or a heating type aerosol-generating article having a low heating temperature, and it is possible to achieve miniaturization of a device and minimize battery consumption.
  • the tobacco material according to an embodiment may include a relatively high nicotine content, and thus a sufficient amount of free-base nicotine can be provided even at a relatively low pH. Therefore, by applying a relatively low pH, it is possible to reduce the off-flavor generated during conversion to free-base nicotine and reduce a nicotine loss rate during storage. For example, a sufficient amount of free-base nicotine may be provided using a relatively small amount of the pH adjuster.
  • the tobacco medium of the present invention may include, on a dry weight basis, at least 70 wt%, preferably at least 75 wt%, more preferably at least 80 wt% of pulverized tobacco material, and an excipient having a pH adjuster. If the tobacco material included in the tobacco medium is below the above-mentioned range, the excipients content becomes overly high, which results in a problem that a sufficient amount of nicotine cannot be provided to a user.
  • the pulverized tobacco material included in the tobacco medium of the present invention may include at least 4 wt% of nicotine on a dry weight basis.
  • the pulverized tobacco material included in the tobacco medium of the present invention may include a relatively high content of nicotine.
  • the nicotine content may be at least 4.5 wt% on a dry weight basis, at least 5 wt% on a dry weight basis, or at least 5.5 wt% on a dry weight basis.
  • the tobacco medium of the present invention may include at least 2.8 wt% of nicotine on a dry weight basis.
  • the tobacco medium of the present invention may include at least 3.15 wt%, or at least 3.5 wt%, or at least 3.85 wt% of nicotine on a dry weight basis.
  • the present invention can provide a high amount of nicotine transfer with a relatively small amount of the pH adjuster by using the tobacco material including a relatively high content of nicotine as described above.
  • a low pH may be maintained with a relatively small amount of the pH adjuster, and the free-base nicotine content is high even at a relatively low pH. Accordingly, nicotine transfer is facilitated, off-flavor is reduced, and the amount of free-base nicotine lost during storage can be reduced.
  • the tobacco material of the present invention may be obtained by pulverizing leaf tobacco of a species having a relatively high nicotine content, or by pulverizing leaf tobacco in which several species are mixed.
  • the tobacco medium including the pH adjuster may have a pH of 6 to 9, preferably 6 to 8, and more preferably 6 to 7.
  • the tobacco medium of the present invention can be characterized in that it can smoothly transfer nicotine even in the above-described pH range that is neutral or weakly basic by including the tobacco material having a relatively high nicotine content.
  • pH adjuster examples include, but are not limited to, one or more basic inorganic salts selected from the group consisting of alkali metal carbonate, alkaline earth metal carbonate, alkali metal hydrogen carbonate, alkaline earth metal hydrogen carbonate, alkali metal hydroxide, alkaline earth metal hydroxide, alkali metal phosphate, alkaline earth metal phosphate, alkali metal phosphate monohydrogen salt, and alkaline earth metal phosphate monohydrogen salt.
  • basic inorganic salts selected from the group consisting of alkali metal carbonate, alkaline earth metal carbonate, alkali metal hydrogen carbonate, alkaline earth metal hydrogen carbonate, alkali metal hydroxide, alkaline earth metal hydroxide, alkali metal phosphate, alkaline earth metal phosphate, alkali metal phosphate monohydrogen salt, and alkaline earth metal phosphate monohydrogen salt.
  • a non-combustible aerosol-generating article may be filled with the tobacco medium of the present invention.
  • the non-combustible aerosol-generating article may include a non-heating type aerosol-generating article that applies no heat and a heating type aerosol-generating article that applies a relatively low heating temperature.
  • the heating type aerosol-generating article of the present invention may be an article that applies a lower heating temperature than a typical heating type aerosol-generating article.
  • the aerosol-generating article of the present invention may have a heating temperature of 30 °C to 180 °C of a device.
  • the heating temperature of the tobacco medium during heating may be heated to 100 °C to 180 °C or 150 °C to 180 °C.
  • the heating temperature may be at least 30 °C.
  • the tobacco medium of the present invention as described above includes the pulverized tobacco material and the pH adjuster.
  • the tobacco medium may include at least 70 wt% of the pulverized tobacco material on a dry weight basis, and the pulverized tobacco material may include at least 4 wt% of nicotine on a dry weight basis. That is, the tobacco medium may include at least 2.8 wt% of nicotine on a dry weight basis.
  • the pH of the tobacco medium may be 6 to 9. Accordingly, by including the tobacco material with the high nicotine content, it is possible to smoothly transfer nicotine even at a relatively low temperature. Accordingly, the tobacco medium of the present invention can be used in a heating type aerosol-generating article and a non-heating type aerosol-generating article as described above.
  • the tobacco medium of the present invention described above is not limited to a particular shape.
  • the tobacco medium may be prepared in the form of reconstituted tobacco leaves or granules.
  • the form of reconstituted tobacco leaves may refer to fragments obtained by finely chopping reconstituted tobacco sheets, or it may refer to a plurality of tobacco strands which are cut from reconstituted tobacco sheets.
  • the reconstituted tobacco sheets are formed by using a slurry which is formed by pulverizing tobacco raw materials such as tobacco leaf pieces, tobacco stems, and/or tobacco fines generated during tobacco processing and mixing them with an aerosol generating material, a flavoring solution, a binder, water, etc. Then, the dried reconstituted tobacco sheets are cut or shredded to form tobacco strands. Meanwhile, natural pulp or cellulose may be added and one or more binders may be mixed in when making the slurry.
  • the granular form may be configured as a single layer, or may be configured as a multilayer structure including a core and a shell surrounding the core.
  • the granular form having the core-shell structure may be composed of a "core” formed by spheroidizing the pulverized tobacco material, etc. and a "shell" surrounding the core.
  • the shell may have one or more layers.
  • Figure 2 schematically shows an embodiment in which a tobacco medium is configured as a granular medium of a core-shell structure according to an embodiment of the present invention.
  • a granular tobacco medium 200 may have a twofold structure configured of one core 210 and one shell 220 as shown in (a) of Figure 2, a threefold structure configured of the core 210 and two-layered shells 220 and 230 as shown in (b) of Figure 2, or a triple structure configured of the core 210 and three-layered shells 220, 230, and 240 as shown in (c) of Figure 2.
  • the core-shell structure of the present invention may be manufactured by a method generally used in the art.
  • the core may be manufactured by spheroidizing the cut tobacco raw material, and preferably may be formed by an atomizing process such as spray chilling.
  • the core can then be layered with powder to form the shell surrounding the core.
  • the core-shell structure may be formed by dispersing the core particles in the shell material that is in a molten state.
  • the tobacco medium of the present invention may additionally include a coating layer on an outside.
  • the tobacco medium of the present invention may be prepared in the form of reconstituted tobacco leaves or granules, and may include a coating layer surrounding the media in the form of reconstituted tobacco leaves or granules.
  • the coating layer is additionally included, due to the increase in the hardness of the tobacco medium, manufacturing workability may be improved.
  • the material that can constitute the coating layer may be used without limitation.
  • Such a material may include, as a binder material, one or more selected from the group consisting of alginate; cellulose such as methylcellulose, ethylcellulose, ethylhydroxyethylcellulose and carboxymethylcellulose; dextran; gum; gum derivative such as hydroxyethyl guar gum, hydroxypropyl guar gum, hydroxyethyl locust bean gum and hydroxypropyl locust bean gum; pectin such as fruit pectin, citrus pectin and tobacco pectin; starch such as modified or derivatized starch; pullulan; and konjac powder.
  • alginate cellulose such as methylcellulose, ethylcellulose, ethylhydroxyethylcellulose and carboxymethylcellulose
  • dextran gum
  • gum derivative such as hydroxyethyl guar gum, hydroxypropyl guar gum, hydroxyethyl locust bean gum and hydroxypropyl locust bean gum
  • the coating layer has pores in order to increase an amount of nicotine transfer from the tobacco material included in the tobacco medium of the present invention.
  • a heat-not-burn cigarette i.e., an aerosol-generating article that is heated rather than combusted
  • the medium may be preferably included in a cigarette that is generally indirectly heated with electrical energy.
  • a cigarette including the tobacco medium of the present invention may be inserted into an aerosol-generating article including a heater.
  • an aerosol is generated from the tobacco medium, which a user can inhale.
  • the tobacco medium of the present invention may include an excipient having the pulverized tobacco material and the excipient.
  • the excipient may include a pH adjuster, a binder, an aerosol former and other additive, except for the tobacco material, but is not limited thereto.
  • the binder is a material capable of increasing hardness by allowing the pulverized tobacco material to be well bound, and as described above, any material known in the art may be used without limitation.
  • the binder may include one or more selected from the group consisting of alginate; cellulose such as methylcellulose, ethylcellulose, ethylhydroxyethylcellulose and carboxymethylcellulose; dextran; gum; gum derivative such as hydroxyethyl guar gum, hydroxypropyl guar gum, hydroxyethyl locust bean gum and hydroxypropyl locust bean gum; pectin such as fruit pectin, citrus pectin and tobacco pectin; starch such as modified or derivatized starch; pullulan; and konjac powder.
  • the aerosol former is a material that is volatilized when heated above a specific volatilization temperature to transfer nicotine and the like as an aerosol.
  • the aerosol former may include one or more selected from the group consisting of monohydric alcohol such as menthol; polyhydric alcohol such as triethylene glycol, tetraethylene glycol, 1,3-butanediol, erythritol, propylene glycol and glycerol; ester of polyhydric alcohol such as glycerol mono-, di- or triacetate; aliphatic ester of mono-, di- or polycarboxylic acid such as diethyl suberate, dimethyldodecanedioate, dimethyl tetradecanedioate, ethyl laurate, lauryl acetate and triethyl citrate; benzyl benzoate; benzyl phenyl acetate; ethyl vanylate; lauric acid;
  • the excipient included in the tobacco medium of the present invention may additionally include one or more selected from the group consisting of a wetting agent, a plasticizer, a flavoring agent, a tobacco and non-tobacco fiber, an aqueous and non-aqueous solvent, and a combination thereof as other additive, but is not limited thereto.
  • the wetting agent is a material that helps to maintain a desired level of moisture in the tobacco medium, and may include, but is not limited to, glycerin or propylene glycol.
  • the plasticizer is an agent that increases a moldability by making the material flexible, and may include, for example, one or more selected from the group consisting of triacetin, dibutyl phthalate, dibutyl sebacate, diethyl phthalate, dimethyl phthalate, acetyltributyl citrate, acetyltriethyl citrate, diacetylated monoglyceride, dibutyl sebacate, mineral oil, benzyl benzoate, chlorbutanol, glycerin monostearate, lanolin alcohol, and cellulose acetate phthalate compatible plasticizer, but is not limited thereto.
  • a flavor may also be referred to as a flavoring agent, and may be an agent that imparts taste and/or aroma to an aerosol generated from a tobacco material.
  • the agent may include licorice, sucrose, fructose syrup, isosweet, cocoa, lavender, cinnamon, cardamom, celery, fenugreek, cascarilla, sandalwood, bergamot, geranium, honey essence, rose oil, vanilla, lemon oil, orange oil, mint oil, caraway, cognac, jasmine, chamomile, menthol, cinnamon, ylang-ylang, sage, spearmint, ginger, coriander or coffee, and the like, but is not limited thereto.
  • a tobacco cellulose fiber may be included as a tobacco fiber
  • a non-tobacco cellulose fiber may be included as a non-tobacco fiber.
  • the inclusion of cellulosic fiber can advantageously increase the tensile strength of the tobacco medium.
  • a suitable non-tobacco cellulosic fiber is known in the art and may include one or more selected from the group consisting of a hardwood fiber, a softwood fiber, a jute fiber, and a flax fiber, but is not limited thereto.
  • An embodiment of the present invention may provide an aerosol-generating article including the tobacco medium described above.
  • the aerosol-generating article of the present invention may be a non-combustible aerosol-generating article. It may generally include a filter portion and a medium portion, and the medium portion may include the tobacco medium of the present invention.
  • the aerosol-generating article may be manufactured in a generally cylindrical shape, and may preferably have a diameter in the range of 5 mm to 8 mm to have the same shape and size as a conventional combustible cigarette, but is not limited thereto.
  • the filter portion included in the aerosol-generating article may be of a type commonly used in the art to which the present invention pertains.
  • a tobacco medium was prepared using the pulverized tobacco material having the same nicotine content.
  • Tobacco leaves, tobacco stems, and the like were pulverized, and after making a slurry by including potassium carbonate as a basic pH adjuster, glycerol as an aerosol former, hydroxyethyl guar gum as a binder, water to help form granules, and ethanol as a solvent as shown in the composition in Table 1 below, granules were formed.
  • the pulverized tobacco material included in the granules (a) and (b) has a nicotine content of about 2.9 wt%.
  • the pH of the granules (a) and (b) at room temperature (about 25 °C) was measured with a pH meter.
  • Granule (a) showed a pH of 7.54
  • granule (b) showed a pH of 8.87.
  • the free-base nicotine content was calculated using the Henderson-Hasselbalch equation of Equation 1 below.
  • the free-base nicotine content among the total nicotine content of the granule (a) was 24.87 wt%, and the free-base nicotine content among the total nicotine content of the granule (b) was 87.62 wt%.
  • a stick i.e., cigarette
  • tobacco medium prepared in experiment 1.(1) above was prepared.
  • the amount of nicotine transfer (mg/10 puff) during 10 puffs was measured by heating the stick at a temperature of about 70 °C, and the off-flavor, pungency, and overall preference during smoking were scored on a 7-point scale and an average value is shown in Table 2 below.
  • Off-flavor during smoking refers to a taste or aroma that does not harmonize with the original taste or aroma of cigarettes and lowers the value of a product.
  • Pungency refers to the degree of stinging, tingling, or pricking sensation in a throat, nose, or mouth 1 second after inhalation. The lower the pungency, the lower the score.
  • the overall tobacco taste was evaluated such that the score becomes higher (i.e., closer to 7 points) as the desirability of the cigarette was higher based on the overall flavor of cigarettes felt after inhalation.
  • the lower sensory evaluation score for off-flavor and pungency indicates the better evaluation result.
  • the higher sensory evaluation score for the overall tobacco taste indicates the better evaluation results.
  • the stick containing the tobacco medium with a high pH delivered a larger amount of nicotine even at a low temperature due to the high free-base nicotine content.
  • the stick containing the tobacco medium with a high pH granule (b)
  • the stick containing the tobacco medium with a high pH had strong off-flavor and pungency during smoking, and a low score was given for the overall tobacco taste.
  • Nicotine storage property was evaluated for the tobacco medium prepared in experiment 1.(1) above. It was observed for about 8 weeks under two storage conditions: the medium was opened (OPEN); and the medium was sealed in a plastic bag at room temperature. The results are shown in Table 3 below.
  • the tobacco medium with a high pH (granule (b)) showed a high nicotine reduction rate after 8 weeks.
  • Tobacco media in the form of granules including the tobacco material with a high nicotine content was prepared (Examples 1 and 2).
  • the slurry was formed as in experiment 1.(1) above, by including potassium carbonate as a basic pH adjuster, glycerol as an aerosol former, hydroxyethyl guar gum as a binder, water to help form granules, ethanol as a solvent, as in the composition of Table 4 below, and then granules were formed.
  • Comparative Example 1 a slurry was prepared using the pulverized tobacco material having a nicotine content of about 2.9 wt%, in the manner as described above, and then granules were formed.
  • Example 1 Example 2 Comparative Example 1 Pulverized tobacco material 100 100 100 Potassium carbonate 3.5 5.0 3.5 Binder 1 1 1 Solvent 64 64 64
  • Example 1 For each tobacco medium of Examples 1 and 2 and Comparative Example 1, when a pH was measured with a pH meter at room temperature (about 25 °C), Example 1 showed a pH of 6.6, Example 2 showed a pH of 7.3, and Comparative Example 1 showed a pH of 7.3.
  • Example 1 and Comparative Example 1 had the same pH adjuster content, but Comparative Example 1 exhibited a higher pH, indicating a pH of 7.3, which was the same as that of Example 2.
  • the free-base nicotine content was calculated using the Henderson-Hasselbalch equation of Equation 1 above.
  • the free-base nicotine content among the total nicotine content of Example 1 was 6.6 wt%
  • the free-base nicotine content among the total nicotine content of Example 2 and Comparative Example 1 was 16 wt%.
  • Sticks containing the tobacco medium of Examples 1 and 2 and Comparative Example in experiment 2.(1) above were prepared. Each stick was filled with 400 mg of tobacco medium and heated to a temperature of about 70 °C, and the amount of nicotine transfer (mg/10 puff) was measured during 10 puffs. The amount of free-base nicotine was calculated and shown in Table 5 below.
  • Example 1 Comparative Example 1 An amount of nicotine transfer (mg/10 puff) 0.44 0.76 0.32 Calculated value of free-base nicotine (mg/400mg) 1.00 4.06 1.86
  • Example 1 with a low pH showed a higher amount of nicotine transfer.
  • Comparative Example 1 and Example 2 had the same pH, but an amount of nicotine transfer of Example 2 was higher than that of Comparative Example 1.
  • Comparative Example 1 including a conventional tobacco material having a nicotine content of 0.1 wt% to 3.5 wt%, it can be seen that when the tobacco raw material having a high nicotine content of at least 4 wt% was used as in the example, more nicotine could be transferred at a lower pH, so there were advantages in terms of off-flavor and storability.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

La présente invention concerne un milieu de tabac et un article générateur d'aérosol comprenant celui-ci, et plus particulièrement un milieu de tabac destiné à être utilisé dans un article générateur d'aérosol non combustible. Le milieu de tabac selon la présente invention comprend un matériau de tabac pulvérisé et un ajusteur de pH, de sorte que le milieu de tabac comprend au moins 70 % en poids du matériau de tabac pulvérisé sur une base de poids sec, le matériau de tabac pulvérisé comprend au moins 4 % en poids de nicotine sur une base de poids sec, le milieu de tabac comprend au moins 2,8 % en poids de nicotine sur une base de poids sec, et un pH du milieu de tabac est compris dans la plage allant de 6 à 9.
EP22804889.8A 2021-05-20 2022-05-10 Milieu de tabac et article générateur d'aérosol comprenant celui-ci Pending EP4340643A1 (fr)

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PCT/KR2022/006629 WO2022245034A1 (fr) 2021-05-20 2022-05-10 Milieu de tabac et article générateur d'aérosol comprenant celui-ci

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US10051884B2 (en) * 2010-03-26 2018-08-21 Philip Morris Usa Inc. Controlled release mentholated tobacco beads
GB201314917D0 (en) * 2013-08-21 2013-10-02 British American Tobacco Co Treated Tobacco and processes for preparing the same, Devices including the same and uses thereof
CN110573031B (zh) * 2017-05-24 2022-04-05 菲利普莫里斯生产公司 包含碱性pH调节剂的均质化植物性材料
UA126676C2 (uk) * 2017-05-24 2023-01-11 Філіп Морріс Продактс С.А. Виріб, що нагрівається та генерує аерозоль, який містить гомогенізований рослинний матеріал
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