Tobacco extract, tobacco filler, non-combustion heat-type smoking article, and method for producing tobacco extract

Abstract

The problem to be solved is to provide a tobacco extract exhibiting the inherent mild flavor of leaf tobacco. A tobacco extract, wherein when H is the total peak area of components having a retention index (RI) of 1800-3100 in gas chromatography, and L is the total peak area of components having a RI of 1365 or more and less than 1800, then 0 < L x 10 / H ≤ 0.55 is satisfied.

Description

Technical Field

[0001] This invention relates to a tobacco extract, a tobacco filling material, a heat-not-burning smoking article, and a method for producing the tobacco extract. Background Technology

[0002] In heated tobacco products, tobacco sticks are typically heated at 150°C–350°C to produce flavor components delivered along with an aerosol. Among these flavor components, sesquiterpenes, diterpenes, higher fatty acids, and higher hydrocarbons are considered unique to tobacco compared to other plants. In particular, diterpenes such as cembranoids and labdanoids are expected to have significant applications (e.g., PTL 1), which are resinous components of tobacco leaves and secretions from trichomes present on the leaf surface. Citation List

[0003] Patent documents

[0004] PTL 1: WO 2022 / 102541 A1 Summary of the Invention

[0005] The problem to be solved by the present invention

[0006] During the drying process after harvesting mature tobacco leaves, and during the various processes that subject the dried tobacco leaves to, the amount of diterpenes such as α-cembratrienediol decreases. For example, during heat drying (which involves short-term drying using heated blowers), α-cembratrienediol and the like decrease by about 20%, as in the case of flue-cured tobacco. Furthermore, during ventilated drying (which involves drying under ventilated conditions at natural temperature and humidity), α-cembratrienediol and the like also decrease by about 80%, as in the case of burley tobacco. The inventors recognized that if the reduction of α-cembratrienediol and the like can be avoided, smoking products exhibiting excellent flavor can be provided. Tobacco extracts extracted from tobacco raw materials are sometimes used as components of tobacco materials, as also disclosed in PTL 1. In view of these circumstances, the present invention addresses the problem of providing a tobacco extract that exhibits the inherent mild flavor of leaf tobacco.

[0007] Solution to the problem

[0008] The inventors have found that the above problems have been solved through the following invention.

[0009] [1] A tobacco extract, wherein H is the total peak area of ​​the component having a retention index (RI) of 1800-3100 in gas chromatography, and

[0010] When L is the total peak area of ​​the component with an RI of 1365 or greater and less than 1800, then

[0011] It satisfies 0 < L×10 / H ≤ 0.55.

[0012] [2] The tobacco extract disclosed in [1] satisfies 0 < L×10 / H ≤ 0.30.

[0013] [3] As disclosed in [1] or [2], where P is the peak area of ​​phytol with an RI of 2114, then

[0014] It satisfies 0 < L / P ≤ 1.2.

[0015] [4] A tobacco filling material comprising (A) a tobacco extract disclosed in any of [1]-[3].

[0016] [5] The tobacco filling material disclosed in [4] contains 0.1-5 wt% (A).

[0017] [6] The tobacco filling material disclosed in [4] or [5] further comprises (B) non-pulp fibers and (C) adhesives.

[0018] [7] The tobacco filling material disclosed in [6] contains a total of 15-50 wt% of (B) and (C).

[0019] [8] The tobacco filling material as described in any one of [4]-[7] further comprises (D) an aerosol source.

[0020] [9] The tobacco filling material disclosed in [8] contains 10-60 wt% (D).

[0021]

[10] A heated non-burning smoking article comprising a tobacco filling material as disclosed in any of [4]-[9].

[0022]

[11] A method for producing a tobacco extract as disclosed in any of [1]-[3], the method comprising: (1) a step of preparing a raw material derived from tobacco;

[0023] (2) Provide the raw material for use in the solid-liquid extraction step using an organic solvent;

[0024] (3) The step of recovering the organic phase from step (2); and

[0025] (4) The step of obtaining the tobacco extract by removing the solvent from the organic phase.

[0026]

[12] The method disclosed in

[11] further includes the step of preparing a tobacco-derived raw material by feeding harvested tobacco leaves to one or more of the following drying steps:

[0027] (i) The step of drying tobacco leaves from the initial stage at a relative humidity of 15%-70% and a temperature of 35°C-80°C for 40-100 hours; and

[0028] (ii) The procedure of drying these tobacco leaves using microwave.

[0029] Advantages of the present invention

[0030] This invention enables the provision of a tobacco extract that exhibits a mild flavor. Attached Figure Description

[0031] [ Figure 1 [Illustration 1] is a diagram illustrating an embodiment of a heated but non-burning smoking article.

[0032] [ Figure 2 [Illustration] is a diagram illustrating an embodiment of a heated, non-burning smoking system.

[0033] [ Figure 3 The image shows the gas chromatogram of sample 1.

[0034] [ Figure 4 The image shows the gas chromatogram of sample 2.

[0035] [ Figure 5 The image shows the gas chromatogram of sample 3.

[0036] [ Figure 6 The image shows the gas chromatogram of sample 5.

[0037] [ Figure 7 [This is a graph showing the relationship between gas chromatograms and RI.]

[0038] [ Figure 8 [] is a graph relating to the total peak area L of component L.

[0039] [ Figure 9 [] is a graph relating to the total peak area H of component H. Detailed Implementation

[0040] In this disclosure, the range “XY” includes X and Y as endpoints.

[0041] 1. Tobacco extract

[0042] When H is the total peak area of ​​the component with a retention index (RI) of 1800-3100 in gas chromatography, and L is the total peak area of ​​the component with an RI of 1365 or greater and less than 1800, the tobacco extract of the present invention satisfies 0 < L×10 / H ≤ 0.55.

[0043] "L×10 / H" will also be referred to as "L / H ratio" below.

[0044] The tobacco extract of this embodiment can exhibit a mild flavor. Furthermore, the tobacco extract of this embodiment is better able to express flavors such as mint.

[0045] Components with an RI of 1800-3100 (hereinafter referred to as "Component H") exhibit the inherent aroma of tobacco. Component H is a group comprising components including chlorophyll, leaf surface resins, higher fatty acids, and partially decomposed products of higher hydrocarbons. Specifically, Component H includes neophytadiene (RI = 1842), phytol (RI = 2114), α-cerebroside trienediol (α-CBT, RI = 2242), and linoleic acid (RI = 2145), etc. Meanwhile, components with an RI of 1365 or greater and less than 1800 (hereinafter referred to as "Component L") are a group comprising components including cerebroside trienediol decomposed products and carotenoid decomposed products. Component L includes 3-oxo-α-ionone (RI = 1648), solanone (RI = 1368), norsanodione (RI = 1489), and megastigmatrienone (RI = 1581), etc.

[0046] The tobacco extract of this embodiment satisfies 0 < L×10 / H ≤ 0.55. That is, the tobacco material has a high content of component H relative to component L. This demonstrates the inherent complex aroma of tobacco. The upper limit of L×10 / H is preferably 0.30 or less, more preferably 0.25 or less, and most preferably 0.20 or less.

[0047] Furthermore, although there are no particular limitations, the tobacco extract can satisfy 0 < L / P ≤ 1.2 when P is the peak area of ​​phytol with an RI of 2114. The upper limit of L / P is preferably 1.2 or less, more preferably 1.0 or less, and most preferably 0.6 or less.

[0048] The tobacco extract of this embodiment can be produced according to the method for producing tobacco extract described below.

[0049] The RI can be determined using a standard n-alkane mixture by well-known methods, but in this embodiment it is preferably determined by the following method.

[0050] 1) Dilute a standard n-alkane mixture (e.g., C7-C40 manufactured by Merck) with hexane and use hexane (C6) to tetradecane (C40) as an index.

[0051] 2) Determine the linear retention index based on the following equation and regard it as RI.

[0052] RI = 100×{[(tr(unknown)-tr(n)] / [tr(N)-tr(n)]+n}

[0053] n = the number of carbon atoms in the n-alkane eluted immediately before the unknown component.

[0054] N = The number of carbon atoms in the n-alkane eluted immediately after the unknown component.

[0055] tr = Retention time

[0056] Tobacco flavorings (hereinafter also referred to as "tobacco flavorings") comprising the tobacco extract of the present invention can also be prepared. Tobacco flavorings can be used as additives to be added to tobacco materials. Tobacco materials (such as tobacco sheets, cut tobacco, wrapping paper, and polysaccharide sheets) can be listed as tobacco materials.

[0057] 2. Method for producing tobacco extract

[0058] The method of the present invention for producing tobacco extract is a method for producing tobacco extract as described in section 1 above, the method comprising:

[0059] (1) Steps for preparing raw materials derived from tobacco;

[0060] (2) Providing the raw material for use in the solid-liquid extraction step using an organic solvent;

[0061] (3) The step of recovering the organic phase from step (2); and

[0062] (4) The step of obtaining the tobacco extract by removing the solvent from the organic phase.

[0063] By performing each of the above steps, the decomposition of component H can be suppressed, and as a result, L×10 / H is kept within the above range.

[0064] Step (1)

[0065] This step involves preparing tobacco-derived raw materials. Tobacco-derived raw materials are those derived from plants of the genus *Nicotiana*, and examples include tobacco raw materials such as tobacco leaves, aged tobacco leaves, cut tobacco, or tobacco powder, as well as processed products or waste products obtained during the processing of tobacco raw materials. "Tobacco leaves" is a general term for tobacco leaves that have not yet undergone aging after harvest. One method of aging includes curing. Cut tobacco refers to aged tobacco leaves that have been cut to a predetermined size. Tobacco powder refers to tobacco leaves that have already been ground.

[0066] Step (2)

[0067] In this step, a tobacco-derived raw material is provided for solid-liquid extraction using an organic solvent. Examples of suitable organic solvents include: hydrocarbons such as hexane; esters such as ethyl acetate, butyl butyrate, and ethyl butyrate; halogenated hydrocarbons such as dichloromethane and chloroform; ketones such as acetone; and nitriles such as acetonitrile. Hexane, ethyl acetate, or mixtures thereof are preferred from the perspective of efficient extraction of the target component H, with hexane being more preferred. Solvents having a boiling point of 80°C or lower are preferred from the perspective of ease of removal in subsequent steps. Therefore, preferred solvents include hexane, ethyl acetate, butyl butyrate, ethyl butyrate, dichloromethane, and chloroform; more preferred are hexane, ethyl acetate, butyl butyrate, and ethyl butyrate; and even more preferred are hexane and ethyl acetate. In this step, the target component H is transferred to an organic solvent (organic phase). A single type of organic solvent can be used, or a combination of two or more can be used. The temperature during extraction can be set at approximately 35°C-40°C to take into account the melting point of component H and its solubility in the organic phase.

[0068] Step (3)

[0069] In this step, the organic phase (or organic layer) obtained in step (2) is recovered. The organic phase is obtained by the solid-liquid extraction described above. The recovery method is not limited and can be carried out using, for example, a separatory funnel. If necessary, the aqueous phase can be washed with an organic solvent, and the washed solvent can be added to the organic phase. In this way, a solution of tobacco extract containing component H can be obtained.

[0070] Step (4)

[0071] In this step, the organic solvent is removed from the organic phase to obtain the tobacco extract. The method of solvent removal is not limited, and an evaporator can be used, for example.

[0072] In this step (4), a further step of dehydrating the organic layer before removing the organic solvent from the organic phase can be provided. There are no limitations on the method of dehydration, and it can be carried out by adding a drying agent such as anhydrous sodium sulfate.

[0073] In this step (4), a further step of removing solids contained in the organic layer can be provided before removing the organic solvent from the organic phase. The solid removal step can be performed after the step of dehydrating the organic layer. There are no restrictions on the method of removal, and it can be carried out by filtration or decantation.

[0074] This embodiment describes a method for producing tobacco extract.

[0075] This may further include the step of preparing a tobacco-derived raw material by feeding the harvested tobacco leaves to one or more of the following drying steps:

[0076] (i) The step of drying tobacco leaves from the initial stage at a relative humidity of 15%-70% and a temperature of 35°C-80°C for 40-100 hours; and

[0077] (ii) The procedure of drying these tobacco leaves using microwave.

[0078] By drying harvested tobacco leaves in this manner, the decomposition of component H can be suppressed, and as a result, L×10 / H is kept within the above range.

[0079] Step (i)

[0080] This step is carried out by harvesting normal-leaf tobacco of varieties such as Burley tobacco and drying the harvested leaves. For example, a hot air circulation system is preferably used for drying. This step is preferably carried out in multiple stages. For example, this step is carried out via a first stage of drying at a low temperature (35°C, 60%-70% relative humidity), a second stage of drying at a medium temperature (40°C-50°C, 35%-50% relative humidity), and a third stage of drying at a high temperature (60°C-75°C, 15%-30% relative humidity). The time for each stage is adjusted appropriately, but for example, the first stage can be carried out for about 10-20 hours, the second stage for about 20-30 hours, and the third stage for about 20-50 hours.

[0081] When drying in this manner, the leaf portion is dried first, followed by the entire tobacco leaf, including the veins. This process inhibits cell damage in the leaf portion, preventing the release of oxidases and reducing moisture content, thus suppressing the reaction between component H and oxidases. Therefore, this method has the advantage of inhibiting the reduction of resin on the tobacco leaf surface containing component H. Furthermore, a slight degree of curing (chlorophyll decomposition) occurs in this drying method, although not reaching the level of normal curing, and thus the amount of component H can be increased.

[0082] Step (ii)

[0083] In this step, harvested tobacco leaves are dried using microwaves. There are no particular restrictions on the environmental conditions for microwave drying. However, since a large amount of moisture can be released from the tobacco leaves, increasing ambient humidity, it is preferable to remove water vapor through appropriate ventilation. Microwaves are typically generated by magnetrons and can be applied at practical frequencies of 915 MHz or 2450 MHz, with output power ranging from 0.6 to 100 kW. Cells in the leaf segments may be damaged by microwave drying, but the drying time can be shortened, thus inhibiting the reaction between component H and oxidases.

[0084] 3. Tobacco filling materials

[0085] Tobacco filling materials are the flavor source for filling tobacco products.

[0086] The tobacco filling material according to this embodiment preferably contains a tobacco extract (A) that satisfies the L / H ratio.

[0087] The tobacco extract (also referred to as "component (A)") satisfying the L / H ratio is as described above. The amount of component (A) in the filler material is preferably 0.1-5 wt%, more preferably 0.3-3 wt%, and most preferably 0.3-1.5 wt%. In this disclosure, unless otherwise stated, the amount of each component is given on a dry weight basis.

[0088] (Non-pulp fiber)

[0089] The tobacco filling material according to this embodiment preferably comprises non-pulp fibers (B).

[0090] Non-pulp fibers (hereinafter also referred to as "Component B") are fibers other than pulp fibers. Pulp fibers are aggregates of cellulose fibers extracted from plants (including woody plants) and are commonly used as starting materials for paper. Examples of pulp fibers that can be listed include waste paper pulp, chemical pulp, and mechanical pulp. In this invention, non-pulp fibers are preferably plant-derived. Plant-derived fibers are biodegradable and therefore have a low environmental burden.

[0091] The average fiber diameter of the non-pulp fibers is preferably 25 µm or less, more preferably 20 µm or less, and even more preferably 15 µm or less. There is no lower limit to the average fiber diameter, but it is 2 nm or more, 10 nm or more, 100 nm or more, 1 µm or more, or 5 µm or more.

[0092] The average fiber diameter of non-pulp fibers can be determined by acquiring images of the fibers, measuring the width (minor axis) of multiple fibers, and averaging these values. When the fiber shape is columnar (rectangular cross-section), the width of the main face (i.e., the longer of the main face width and the side face width) is defined as the fiber width. The number of fibers measured is preferably 100 or more.

[0093] The non-pulp fiber is preferably a monofibrillated cellulose fiber. Monofibrillated cellulose fibers are fine fibers obtained by subjecting pulp fibers to treatments such as fibrillation. Monofibrillated cellulose fibers can undergo chemical modifications such as oxidation. The average fiber diameter of the monofibrillated cellulose fibers is as described above. There is no limitation on the average fiber length of the monofibrillated cellulose fibers, but its upper limit is preferably 2000 µm or less, and more preferably 1500 µm or less. Its lower limit is preferably 100 µm or more, and more preferably 500 µm or more.

[0094] Furthermore, the non-pulp fiber is preferably dietary fiber. Dietary fiber is a dietary component that is not digested by human digestive enzymes, and more preferably, insoluble dietary fiber that is insoluble in water. Dietary fiber can be porous, i.e., spongy. The fiber is preferably citrus fiber because it is readily available, etc. Citrus fiber is fiber mainly composed of the mesocarp of citrus fruits. The average fiber diameter of citrus fiber is as described above. In addition, dietary fiber can also be short fibers or columnar particles with a small aspect ratio.

[0095] On one hand, monofibrillated cellulose fibers and dietary fiber are used in combination. The use of both improves the strength and water dispersibility of tobacco sheets (tobacco filling materials), as well as the sensation of smoke delivery. The upper limit of the weight of monofibrillated cellulose fibers relative to 1 part by weight is preferably 1.5 parts by weight or less, and more preferably 1.2 parts by weight or less, and the lower limit is preferably 0.1 parts by weight or more, and more preferably 0.3 parts by weight or more.

[0096] All fibers in the tobacco filling material are preferably composed of non-pulp fibers, but the tobacco filling material may also include fibers other than non-pulp fibers. In this case, the amount of non-pulp fibers in all fibers is preferably 60-99 wt%, and more preferably 70-90 wt%.

[0097] The amount of component (B) in the tobacco filling material is preferably 1-30 wt%, more preferably 2-15 wt%, and most preferably 5-10 wt%.

[0098] (Adhesive)

[0099] The tobacco filling material according to this embodiment preferably includes an adhesive (C).

[0100] The binder (also known as “component (C)”) binds the components of the tobacco filling material in order to maintain the cohesiveness of the tobacco filling material. Examples of binders that can be listed include pullulan, hydroxypropyl cellulose (HPC), guar gum, xanthan gum, carboxymethyl cellulose (CMC), sodium carboxymethyl cellulose (CMC-Na), and mixtures thereof.

[0101] The amount of component (C) in the tobacco filling material is preferably 1-30 wt%, more preferably 3-10 wt%, and most preferably 4-6 wt%.

[0102] The total amount of (B) and (C) in the tobacco filling material is preferably 8-50 wt%, more preferably 10-30 wt%, and most preferably 5-15 wt%. The total amount of (B) and (C) in the tobacco filling material can also be 15-50 wt%.

[0103] (Aerosol source)

[0104] The tobacco filling material according to this embodiment preferably includes an aerosol source (D).

[0105] An aerosol source (also referred to as "component (D)") is a material that is heated and vaporized and cooled to produce an aerosol, or atomized to produce an aerosol. When the filler material contains an aerosol source, a sufficient amount of smoke can be achieved. Known aerosol sources can be used, examples of which include: polyols such as glycerol, vegetable glycerol, and propylene glycol (PG); and triethyl citrate (TEC) and triacetin. The amount of aerosol source in the tobacco filler material is preferably 10-60 wt%, more preferably 10-30 wt%, and most preferably 15-20 wt%. An amount of aerosol source exceeding the upper limit may cause staining of tobacco segments, etc., and an amount below the lower limit risks reducing the perceived smoke delivery.

[0106] (Tobacco materials other than component (A))

[0107] The tobacco filling material according to this embodiment may also contain tobacco material other than component (A) (this tobacco material is also referred to as “component (E)”).

[0108] Component (E) is not limited, as long as it is a material derived from a plant of the genus *Nicotiana*. Specific examples of component (E) that may be listed include cut tobacco, tobacco powder, tobacco sheets, and shredded tobacco commonly used in the art. These tobacco materials can be used alone or in combination. Among them, component (E) is preferably cut tobacco or cut material obtained from tobacco sheets, from the perspective of better miscibility with component (A).

[0109] For example, common tobacco (Nicotiana tabacum) and yellow tobacco (Nicotiana rustica), belonging to the genus Nicotiana, can be appropriately used as leaf tobaccos in component (E). Varieties that can be used include, but are not limited to, well-known varieties such as burley and flue-cured tobacco. One or more of these leaf tobacco varieties can be blended for use. Suitable blends of the aforementioned varieties can be used as mixtures to achieve the desired flavor.

[0110] The amount of component (E) in the filler material is preferably 5-85 wt%, and more preferably 25-65 wt%.

[0111] (Non-tobacco flavoring)

[0112] Tobacco materials may further comprise non-tobacco flavorings (also referred to as "components (F)"). Non-tobacco flavorings are flavorings not derived from tobacco. Examples that can be listed include flavoring agents, powdered food materials, coolants, and combinations thereof. Well-known flavoring agents, powdered food materials, and coolants may be used.

[0113] The following can be used, alone or in combination, as flavoring agents or coolants:

[0114] p-Methoxyacetophenone, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, pentanol, amyl butyrate, trans-anisole, star anise oil, apple juice, Peruvian gum oil, beeswax absolute, benzaldehyde, benzoin extract, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-carotene, carrot juice, L-carvone, β-caryophyllene, cinnamon bark Oils, cypress oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronellol, DL-citronellol, sage extract, cocoa, coffee, chamomile oil, coriander oil, cuminaldehyde, artemisia oil, δ-decanoic acid, γ-decanoic acid, decanoic acid, dill oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenic acid, 2,3-dimethyl... Pyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl acetopropionate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy 4-Methyl-2(5H)-furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek oil, broom oil, gentian root extract, geraniol, geraniol acetate, grape juice, guaiacol, guava extract, γ-heptanol, γ-caprolactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexanol, hexyl phenylacetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-Trimethyl-2-cyclohexen-1-one, 4-(p-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute oil, β-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyrate, isobutyl phenylacetate, jasmine absolute oil, kola nut extract, rockrose oil, terpene-free lemon oil, licorice extract, linalool, linalyl acetate, Angelica sinensis root oil, maltol, maple syrup, menthol, menthone, L-menthol acetate, p-methoxybenzaldehyde, methyl-2-pyrrole 4'-Methylacetophenone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute oil, molasses, myristic acid, nerol, nerolidol, γ-nonalactone, myristole oil, δ-octylactone, octanal, caprylic acid, neroli oil, orange oil, orris root oil, palmitic acid, ω-pentadecanolactone, peppermint oil, Paraguayan orange leaf oil, phenethyl alcohol, phenylacetic acid, phenylacetic acid, piperaldehyde, plum extract, propenyl ethyl guaiacol, propionate, 3-propyl Indole, plum juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax essential oil, marigold oil, tea distillate, α-terpinene ester, terpinene acetate ester, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxehera (8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tetranone, triethyl citrate, 4-(2,6,6-trimethyl... 1-Cyclohexenyl)-2-buten-4-one, 2,6,6-trimethyl-2-cyclohexen-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclohexadienyl)-2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecyl lactone, γ-valerol lactone, vanilla extract, vanillin, veratral, violet leaf essential oil, N-ethyl-p-menthane-3-carbamate (WS-3), and ethyl-2-(p-menthane-3-carbamate)acetate (WS-5).

[0115] There are no particular restrictions on powdered food ingredients, but well-known powders containing plant materials, such as cocoa powder, licorice powder, St. John's wort powder, or vanilla bean, are generally available products that can be added alone or in combination of two or more for use.

[0116] Preferably, a flavoring agent with an RI of 1600 or less is used. Ordinary tobacco extracts contain a relatively large amount of a component (component L) with an RI of 1600 or less. In ordinary tobacco extracts, there is interference between the flavoring agent and component L, and the characteristics of the flavoring agent may not be fully expressed. However, the tobacco filling material of this embodiment can fully express the characteristics of the flavoring agent. Menthol is particularly preferred as a flavoring agent with an RI of 1600 or less.

[0117] Tobacco filling materials can be produced using well-known methods. For example, tobacco filling materials can be produced by mixing these components. Alternatively, the composition can be formed by: mixing the components, spreading the composition on a substrate to prepare a sheet, and using the sheet as a filling material without further processing, or by cutting the sheet and using the cut material as a filling material.

[0118] 4. Heated but not burned smoking products

[0119] The heated non-burning smoking article of the present invention comprises the tobacco filling material as described above in section 3.

[0120] Tobacco filling materials are suitable for heated tobacco products that do not burn. Figure 1 An embodiment of a heated non-burning smoking article is shown. As shown in the accompanying drawings, the heated non-burning smoking article 20 includes: a tobacco segment 20A, a cylindrical cooling portion 20B with circumferential perforations, and a filter portion 20C. The heated non-burning smoking article 20 may include other components besides these. There is no limitation on the axial length of the heated non-burning smoking article 20, but the axial length is preferably 40-90 mm, more preferably 50-75 mm, and even more preferably 50-60 mm. Furthermore, the circumferential length of the heated non-burning smoking article 20 is preferably 16-25 mm, more preferably 20-24 mm, and even more preferably 21-23 mm. In an exemplary model that can be exemplified, the length of the tobacco segment 20A is 20 mm, the length of the cooling portion 20B is 20 mm, and the length of the filter portion 20C is 7 mm. The lengths of the components can be appropriately modified according to manufacturability and desired quality, etc. Figure 1 The pattern of setting the first segment 25 is shown, but this segment is not required, and only the second segment 26 can be set on the downstream side of the cooling section 20B.

[0121] 1) Tobacco Section 20A

[0122] The tobacco filling material 21 in tobacco segment 20A comprises a tobacco extract having the specific L / H ratio described above, or a tobacco filling material containing such tobacco material. There are no particular limitations on the method of packaging the tobacco filling material 21 inside a wrapping (wrapping paper) 22, but for example, the tobacco filling material 21 may be encapsulated in the wrapping 22, or the tobacco filling material 21 may be packaged inside a cylindrical wrapping 22. When the tobacco filling material has a longitudinal shape (e.g., a rectangular shape), the tobacco filling material may be packaged such that the longitudinal direction of each rectangle is randomly oriented inside the wrapping 22, or it may be packaged such that the longitudinal direction is aligned with or perpendicular to the axial direction of tobacco segment 20A. Tobacco segment 20A is heated to thereby vaporize the tobacco components, aerosol source, and water contained in the tobacco filling material 21, and is then ready for inhalation of these components.

[0123] 2) Cooling section 20B

[0124] The cooling section 20B is preferably formed of a cylindrical member. The cylindrical member can be, for example, a paper tube 23 obtained by processing cardboard into a cylindrical shape. Alternatively, the cooling section 20B can also be formed of a thin sheet of material that is wrinkled and then pleated, gathered, or folded to form a channel. Examples of such materials that can be used include sheet materials selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil. The total surface area of ​​the cooling section 20B is appropriately set considering cooling efficiency and can be, for example, 300-1000 mm². 2 / mm. The cooling section 20B is preferably provided with perforations 24. The perforations 24 allow outside air to be introduced into the cooling section 20B during inhalation. Therefore, the aerosol vaporized components generated by heating the tobacco section 20A are liquefied because the aerosol vaporized components come into contact with outside air, causing their temperature to drop and forming an aerosol. There is no particular limitation on the diameter (span length) of the perforations 24, and the diameter can be, for example, 0.5-1.5 mm. There is no particular limitation on the number of perforations 24, and one, two, or more perforations can be present. For example, multiple perforations 24 can be provided on the circumference of the cooling section 20B.

[0125] The cooling section 20B can be formed in the shape of a rod with an axial length of, for example, 7-28 mm. The axial length of the cooling section 20B can be, for example, 18 mm. The cooling section 20B can have a substantially circular axial cross-sectional shape with a diameter of 5-10 mm. The diameter of the cooling section can be, for example, approximately 7 mm.

[0126] 3) Filter section 20°C

[0127] There are no particular restrictions on the configuration of the filter section 20C, but it can be formed by a single or multiple filler layers. The outer side of the filler layer can be wrapped with one or more sheets of wrapping paper. For example, the airflow resistance of the filter section 20C can be appropriately modified by the amount and material of the filter filler material. For instance, when the filter filler material is cellulose acetate fiber, increasing the amount of cellulose acetate fiber filling the filter section 20C may lead to an increase in airflow resistance. When the filter filler material is cellulose acetate fiber, the packing density of the cellulose acetate fiber can be 0.13-0.18 g / cm³. 3 Air resistance is a value measured using an air resistance meter (trade name: SODIMAX, manufactured by SODIM).

[0128] There is no particular limitation on the circumferential length of the filter section 20C, but this circumferential length is preferably 16-25 mm, more preferably 20-24 mm, and even more preferably 21-23 mm. The axial length of the filter section 20C ( Figure 1 The horizontal length of the filter section 20C can be selected to be 4-10 mm, and this length is chosen to achieve an airflow resistance of 15-60 mmH2O per segment. The axial length of the filter section 20C is preferably 5-9 mm, and more preferably 6-8 mm. There are no particular limitations on the cross-sectional shape of the filter section 20C, but the cross-sectional shape can be, for example, circular, elliptical, or polygonal. In addition, easily broken capsules, flavor beads, or flavorings containing flavoring agents can be directly added to the filter section 20C.

[0129] The filter section 20C may include a central hole portion as a first segment 25. The central hole portion may include a first filling layer 25a having one or more hollow portions, and an inner rod wrapping (inner wrapping paper) 25b covering the filling layer. The central hole portion functions to reinforce the suction nozzle portion. The shape of the central hole portion can be maintained by thermoforming without the need for the inner rod wrapping 25b. The filter section 20C may include a second segment 26. The second segment 26 includes a second filling layer 26a and an inner rod wrapping (inner wrapping paper) 26b covering the second filling layer 26a. The second filling layer 26a may, for example, be formed as a rod with an inner diameter of φ5.0 mm-φ1.0 mm, filled with high-density cellulose acetate fibers, wherein a plasticizer containing triacetin is added in an amount of 6-20 wt% relative to the weight of cellulose acetate, and the plasticizer is cured. The second filling layer has high bulk density fibers, so air and aerosol flow only through the hollow portions during suction, and hardly through the filling layer. The second filling layer inside the central hole is a fiber filling layer, so users will hardly feel any discomfort when touching the outside during use.

[0130] The first filling layer 25a and the second filling layer 26a are connected by an outer rod wrapping (outer wrapping paper) 27. For example, the outer rod wrapping 27 can be a cylindrical paper. Furthermore, the tobacco segment 20A, the cooling section 20B, and the connecting first filling layer 25a and second filling layer 26a are connected by a mouthpiece liner 28. These connections can be formed, for example, by coating the inner surface of the mouthpiece liner 28 with glue (such as vinyl acetate-based glue) and wrapping the three components. These components can also be connected using multiple liners via multiple individual connectors.

[0131] The combination of heated non-burning smoking products with heating devices for generating aerosols, especially heated non-burning smoking systems. Figure 2 An example of the system is shown. The heated non-burning smoking system in the accompanying drawings includes a heated non-burning smoking article 20 and a heating device 10 for externally heating the tobacco segment 20A.

[0132] The heating device 10 includes a body 11, a heater 12, a metal tube 13, a battery unit 14, and a control unit 15. The body 11 has a cylindrical recess 16, wherein the heater 12 and the metal tube 13 are positioned facing the smoking section 20A inserted into the recess 16. The heater 12 may be a resistive heater, wherein the battery unit 14 supplies power according to commands from the control unit 15 controlling the temperature, causing the heater 12 to heat. Heat emitted from the heater 12 is transferred to the tobacco section 20A through the highly thermally conductive metal tube 13. The accompanying drawings illustrate a mode in which the heating device 10 heats the tobacco section 20A from the outside, but the tobacco section can also be heated from the inside. There are no particular limitations on the heating temperature generated by the heating device 10, and this heating temperature is preferably 400°C or lower, more preferably 150°C-400°C, and even more preferably 200°C-350°C. The heating temperature refers to the temperature of the heater in the heating device 10. In addition, a sensor can be installed inside the tobacco segment 20A to heat the tobacco segment 20A by means of IH method. Example

[0133] 1. Sample Preparation

[0134] 1-1. Green Dry Method

[0135] Japanese Burley tobacco and Brazilian Burley tobacco are prepared and dried in the following manner to prepare dried leaves. The leaves obtained by this drying process are also known as "green dried leaves".

[0136] 1) Place the harvested Burley tobacco leaves in a hot air circulation device.

[0137] 2) Keep the leaves at 35°C and 64% RH for 12 hours.

[0138] 3) The leaf portion is then dried at 45°C and 41% relative humidity for 24 hours, and finally the entire tobacco leaf, including the vein portion, is dried at 68°C and 19% RH for 36 hours.

[0139] 4) After drying, remove the leaves without adding humidified hot air inside the equipment, obtaining dried leaves that exhibit a yellowish-green to dark green color (hereinafter referred to as "green dried leaves"). Use a threshing machine to separate the green dried leaves into leaf portions and vein portions, and quickly and airtightly package the leaf portions in plastic. Keep the material in its packaging airtight until the material undergoes extraction treatment or sheet forming.

[0140] 1-2. Preparation of Tobacco Extract

[0141] 1-2-1. Preparation of oleoresin (semi-solid extract) using organic solvents

[0142] 150 g of leaf fraction obtained from 1-1 (using Japanese or Brazilian Burley tobacco) was removed from its packaging and placed in a sealed 2500 mL stainless steel container. Then, 1500 mL of n-hexane or ethyl acetate alone (for high-performance liquid chromatography, manufactured by Fujifilm Wako Pure Chemical Corp.) was added to the container, and extraction was carried out for 3 hours with the container under sealed stirring in a 40°C hot bath. After extraction, the hexane or ethyl acetate was separated from the extraction residue using a stainless steel mesh with 250 µm openings, yielding approximately 1300 mL of either hexane or ethyl acetate solution. Each of the resulting solutions was allowed to stand sufficiently, and then the organic layer was removed by adding approximately 50 g of anhydrous sodium sulfate while stirring, and dehydrating the organic layer. The dehydrated organic layer was filtered using filter paper (Advantec 5A) to remove insoluble material. Hexane or ethyl acetate was further removed from the resulting filtered organic layer under reduced pressure using a rotary evaporator (manufactured by BUCHI Japan). The solids were extracted from hexane to obtain a dry solid (hereinafter referred to as "Sample 2") in a yield of 2.2-2.5 wt%, and the solids were extracted from ethyl acetate to obtain a dry solid (hereinafter referred to as "Sample 1") in a yield of 7.3-7.5 wt%.

[0143] In addition, dried leaves of Brazilian Burley tobacco (hereinafter also referred to as "dried Burley tobacco leaves") produced by conventional methods were prepared, and the dried Burley tobacco leaves were separated into leaf fractions and vein fractions using a thresher in the same manner as in 1-1 to obtain the leaf fractions. The obtained leaf fractions were treated in the same manner as the hexane treatment of the dried leaves described above, and dried solids (hereinafter referred to as "sample 4") were obtained in a yield of 4.5-5.5 wt%.

[0144] 1-2-2. Preparation of Aqueous Extracts from Tobacco (Water Extraction)

[0145] 150 g of leaf fraction obtained from 1-1 (using Japanese or Brazilian Burley tobacco) was removed from its packaging material and placed in a sealed 2500 mL stainless steel container. 1500 mL of distilled water was then added to the container, and extraction was performed for 3 hours with the container under sealed stirring in a 40°C hot bath. After extraction, the water was separated from the extraction residue using a stainless steel mesh with a 250 µm opening, yielding approximately 2000 mL of extract. 100 mL of the resulting extract was removed, and 100 mL of ethyl acetate was added to the extract, followed by liquid-liquid extraction. The resulting organic phase was concentrated using a rotary evaporator, yielding a concentrated dry solid (hereinafter referred to as "Sample 3") in approximately 1.3–1.5 wt%.

[0146] The dried solids of samples 1-4 obtained in 1-2-1 and 1-2-2 above were each dissolved in the same solvent used for extraction, such that their respective concentrations were 4.0 wt%, and the resulting solutions were used as GC analysis samples 1-4, as described later.

[0147] 1-3. Preparation of Tobacco Sheets

[0148] 1-3-1. Laminated Tablets

[0149] 8.8 g of pulp and 8.8 g of CMC (carboxymethyl cellulose) were added to 113 g of citrus fiber (HerbacelAQ Plus CF-D, manufactured by Sumitomo Pharma & Chemical Co., Ltd.), and the mixture was stirred in a mixing apparatus for 2 minutes to obtain a compound. 50 g of water and 19.3 g of glycerol were added to the resulting compound, and the material was stirred in a mixing apparatus for 2 minutes to obtain a compound. The resulting compound was kneaded using an extruder. The kneading step was repeated a total of three times to obtain a kneaded material. The kneaded material obtained as described above was applied to calendering rolls set with a 0.1 mm interval and formed into a sheet. The sheet was then dried in a hot air dryer at 80°C for 5 minutes, and the resulting sheet was used as a base sheet. The dried solids obtained in 1-2-1 and 1-2-2 above were each added to the resulting base sheet in an amount of up to 5000 ppm to obtain a laminated sheet used as a sensory evaluation sample, which will be described later.

[0150] The laminate obtained by using the dried solid extracted from asperane (sample 2) was used as sample 5.

[0151] 1-3-2. Flavor-coated sheets

[0152] Glycerin, hydroxypropyl cellulose (trade name: Celny, manufactured by Nippon Soda Co., Ltd.), plant fiber (citrus fiber, trade name: Herbacel AQ Plus CF-D, manufactured by Sumitomo Pharmaceutical Chemical Co., Ltd.), and propylene glycol (in which each of the dried solids obtained in 1-2-1 and 1-2-2 above has been added) were blended to a mass ratio of 8:7:4:1, and water was further added to prepare an aqueous solution (water content: approximately 7% by mass). The aqueous solution was further coated onto a nonwoven fabric (trade name: Taiko TCF, manufactured by Futamura Chemical Co., Ltd.) and dried in a hot air dryer at 80°C for 45 minutes to obtain a flavor-coated sheet used as a sensory evaluation sample, which will be described later. It should be noted that the amount of dried solids added to the propylene glycol was adjusted so that the amount of dried solids was 5000 ppm relative to the flavor-coated sheet obtained at the end.

[0153] 2. Measurement of Tobacco Essential Oil Components

[0154] 2-1. Sample preparation for GC analysis

[0155] Weigh out 5.0 g of the laminated sample 5 obtained in step 1-3-1 above and place it into a sealed glass container with a capacity of 100 mL. Then add 45 mL of ethyl acetate (for high performance liquid chromatography, manufactured by Fujifilm Wako Pure Chemical Corp.), and extract for approximately 12 hours while the container is left to stand at room temperature in a sealed state. After extraction, filter the solution and extract residue using filter paper (Advantec 5A); approximately 40 mL of ethyl acetate solution (ethyl acetate extract) is obtained.

[0156] Approximately 5 g of anhydrous sodium sulfate was then added to the ethyl acetate extract, and dehydration was performed by gently agitating the material in the sealed container for approximately 1 hour. The dehydrated extract was then filtered to separate the solid and liquid components, and the solid was repeatedly washed with fresh ethyl acetate. The recovered wash liquid and extract were collected in a 200 mL round-bottom flask. Ethyl acetate was removed from the liquid in the round-bottom flask using a rotary evaporator to obtain approximately 300 mg of dry solids. Finally, ethyl acetate was added to achieve a dry solids concentration of 4.0 wt%, and GC analysis sample 5 was obtained.

[0157] GC analysis (component identification by GC / MS) was performed on samples 1-3 and 5 obtained as described above under the conditions given below. GC analysis was performed at N = 5. The GC chromatograms of samples 1-3 and 5 are shown below. Figure 3-6 middle.

[0158] (Component identification by GC / MS)

[0159] Chromatographic column: HP-5MS (30 m × 0.25 mm × 0.25 µm)

[0160] Oven: Hold at 40°C for 3 minutes → Increase temperature at 4°C / min → Hold at 280°C for 20 minutes

[0161] Detector: MS

[0162] Inlet: Split ratio (10:1), 270°C

[0163] Injection volume: 1 µL

[0164] Flow rate: 1 mL / min (constant flow mode)

[0165] 2-2. Retention Index (RI)

[0166] A commercially available standard n-alkanes mixture (C7-C40 manufactured by Merck) was diluted with hexane, and the RI was determined using hexane (C6) to tetradecane (C40) as an index.

[0167] The linear retention index RI is determined based on the following equation.

[0168] RI = 100×{[(tr(unknown)-tr(n)] / [tr(N)-tr(n)]+n}

[0169] n = the number of carbon atoms in the n-alkane eluted immediately before the unknown component.

[0170] N = The number of carbon atoms in the n-alkane eluted immediately after the unknown component.

[0171] tr = Retention time

[0172] As an example, Figure 7 The relationship between the gas chromatograms of domestic Burley tobacco leaves (top) and a mixture of n-alkane standards (bottom) is shown.

[0173] Table 1 below shows the retention time and retention index (DB-5) of the analyzed n-alkane standard mixture (using column: DB-5).

[0174] [Table 1]

[0175]

[0176] 3. Evaluation results based on GC analysis

[0177] GC analysis was performed on samples 1-5 obtained in the manner described above under the conditions given below (peak balance by GC / FID analysis). The total peak area H of component H with an RI of 1800-3100 and the total peak area L of component L with an RI of 1365 or greater but less than 1800 were obtained, and L × 10 / H (L / H ratio) was calculated. The peak area P of phytol with an RI of 2114 was determined, and L / P (also known as the "L / P ratio") was calculated. The L / H ratio and L / P ratio of samples 1-3 and 5 related to green dried leaves were measured using Japanese Burley tobacco (four times) and Brazilian Burley tobacco (four times), for a total of eight measurements. Simultaneously, four measurements were performed on sample 4 related to dried Burley tobacco leaves using Brazilian Burley tobacco. The mean and fluctuation of the obtained measurements were then calculated. It should be noted that in samples 1-3 and 5, the L / H and L / P ratios when using Japanese Burley tobacco and when using Brazilian Burley tobacco were comparable, and no significant differences were observed.

[0178] The calculated L and H graphs are shown in the figure. Figure 8and Figure 9 In addition, data related to the L / H ratio and L / P ratio are summarized in Table 2 below. Peak areas were determined after baseline correction (the same applies below), with samples 1, 2, and 5 corresponding to examples, and samples 3 and 4 corresponding to control examples.

[0179] (Peak balance analyzed by GC / FID)

[0180] Chromatographic column: HP-5MS (30 m × 0.25 mm × 0.25 µm)

[0181] Oven: Hold at 40°C for 3 minutes → Increase temperature at 4°C / min → Hold at 280°C for 20 minutes

[0182] Detector: FID

[0183] Inlet: Split ratio (10:1), 270°C

[0184] Injection volume: 1 µL

[0185] Flow rate: 1 mL / min (constant flow mode)

[0186] [Table 2]

[0187]

[0188] like Figure 8 and 9 As shown in Table 2, it can be seen that both Samples 1 and 2, which used dried green leaves and ethyl acetate and hexane as extraction solvents respectively, exhibited low extraction yields of component L (RI 1365 or greater but less than 1800) and high extraction yields of component H (RI 1800-3100), with the result satisfying 0 < L / H ratio (L×10 / H) ≤ 0.55. Particularly for Sample 2, it can be seen that the extraction yield of component L is lower and the extraction yield of component H is higher, and the L / H ratio is lower than that in Sample 1. These results indicate that hexane can selectively extract a larger amount of component H compared to ethyl acetate.

[0189] Meanwhile, it can be seen that sample 3, which uses dried green leaves and distilled water as the extraction solvent, shows a high extraction amount of component L and a low extraction amount of component H, and the resulting L / H ratio is much higher than 0.55.

[0190] Furthermore, although the extraction yield of component H in Sample 4, which used dried Burley tobacco leaves and hexane as the extraction solvent, was relatively high, a significant amount of component L was also extracted, resulting in an L / H ratio exceeding 0.55. These results indicate that when dried Burley tobacco leaves are used, a large amount of component L is extracted along with component H, making selective extraction of component H difficult even when using hexane.

[0191] In addition, such as Figure 8 and Figure 9 As shown in Table 2, it can be seen that Sample 5 (which is a laminate prepared using dried green leaves and tobacco extract extracted with hexane) exhibits a low extraction amount of component L and a high extraction amount of component H, similar to Sample 2, and as a result, it satisfies 0 < L / H ratio ≤ 0.55.

[0192] As shown in Table 2, it can be seen that the L / P ratio in samples 1-5 shows the same trend as the L / H ratio. Figure 8 As shown, sample 3, which uses distilled water as the extraction solvent, exhibits a high extraction yield of component L and a very low extraction yield of phytosterol (which has low solubility in water), resulting in a very high L / P ratio.

[0193] 4. Confirmation of the effects (sensory evaluation) of heated non-burning smoking products.

[0194] 4-1. Evaluate the flavor (mildness / smoothness in the mouth) using different drying and extraction methods.

[0195] 4-1-1. Preparation of Sensory Evaluation Samples

[0196] Brazilian Burley tobacco dried leaves (hereinafter also referred to as "Bulb tobacco dried leaves") produced by conventional methods were prepared, and the Burley tobacco dried leaves were separated into leaf fractions and vein fractions using a threshing machine in the same manner as in 1-1 to obtain leaf fractions. The obtained leaf fractions were treated in the same manner as the ethyl acetate treatment of the green dried leaves in 1-2-1 above, and a dried solid was obtained.

[0197] Furthermore, the packaging material obtained in 1-1 above (using Brazilian Burley tobacco) is subjected to the same treatment as in 1-2-1 above, and dried solids from the astragalus extract and ethyl acetate extract are obtained respectively. The packaging material obtained in 1-1 above (using Brazilian Burley tobacco) is further subjected to the same treatment as in 1-2-2 above, and dried solids from the water extract are obtained.

[0198] The dried solids obtained in the above manner were each added to the base tablets obtained in 1-3-1 above in an amount of up to 5000 ppm to obtain laminated tablets. Details of the obtained laminated tablets are summarized in Table 3.

[0199] Furthermore, flavor-coated sheets are obtained in the same manner as described in 1-3-2 above, except that dried solids (using dried green leaves) from the ethyl acetate extract solids obtained in the manner described above are used. It should be noted that the amount of dried solids is adjusted so that the amount of dried solids relative to the flavor-coated sheets obtained at the end is 5000 ppm.

[0200] Weigh 5.0 g of the laminated or flavor-coated sheet obtained as described above and place it into a sealed 100 mL glass container. Perform the subsequent procedures in the same manner as in step 2-1 above, and at the end, obtain GC analysis samples derived from each laminated or flavor-coated sheet. Use the GC analysis samples obtained as described above to perform GC analysis in the same manner as in step 3 above, and calculate the L / H ratio and L / P ratio. The data related to the L / H ratio and L / P ratio are summarized in Table 3 below.

[0201] In Table 3, levels 1, 3, and 4 correspond to examples, and levels 2 and 2 correspond to contrasting examples.

[0202] [Table 3]

[0203]

[0204] The laminated sheets and flavor-coated sheets obtained in the above manner were each cut into 0.8 mm wide slices. Preparation Figure 1 The heated non-burning smoking article shown has a tobacco segment 20A with a length of 20 mm, a cooling section 20B with a length of 20 mm, and a filter section 20C with a length of 7 mm. Each tobacco segment 20A is filled with 0.3 g of diced tobacco.

[0205] 4-1-2. Sensory evaluation

[0206] The smoking product was heated using a heating device (Ploom X, manufactured by Japan Tobacco Inc.), and the smoking was evaluated by a panel of 10 trained experts. The warmth / smoothness in the mouth during smoking was assessed using a five-point scale. The results are shown in Table 4 below.

[0207] 1. Not mild at all

[0208] 2 Not mild

[0209] 3 Standards

[0210] 4. Mild

[0211] 5. Very mild

[0212] [Table 4]

[0213]

[0214] As shown in Table 4, using the ethyl acetate extract from dried Burley tobacco leaves as a control, the ethyl acetate extract from green leaves (Level 3) exhibited a very mild flavor. The sample using hexane as the solvent for green leaf extraction (Level 1) also exhibited a very mild flavor, comparable to or milder than the sample using ethyl acetate (Level 3). Furthermore, compared to dried Burley tobacco leaves (control), the sample using green leaves as the raw material but water as the solvent for green leaf extraction (Level 2) failed to achieve the desired mild aroma.

[0215] The flavor-coated sheets (Level 4) using ethyl acetate extract from dried green leaves exhibited a flavor comparable to the laminated sheets (Level 3) using ethyl acetate extract from dried green leaves. Therefore, there was no significant difference in flavor due to the difference in sheet preparation methods.

[0216] 4-2. Evaluation of peppermint flavor using different extraction solvents.

[0217] 4-2-1. Preparation of Sensory Evaluation Samples

[0218] The dried solids obtained by extracting dried Burley tobacco leaves with ethyl acetate, the dried solids obtained by extracting dried green leaves with ethyl acetate, and the dried solids obtained by extracting dried green leaves with hexane were prepared respectively, which were obtained in 4-1-1 above.

[0219] The dried solids were added to the base tablets obtained in 1-3-1 above to an amount of up to 5000 ppm to obtain laminated tablets. Details of the obtained laminated tablets are summarized in Table 5.

[0220] Weigh 5.0 g of each laminate obtained as described above and place it into a sealed glass container with a capacity of 100 mL. Perform the subsequent procedures in the same manner as in step 2-1 above, and obtain a GC analysis sample derived from each laminate at the end. Perform GC analysis using the GC analysis sample obtained as described above in the same manner as in step 3 above, and calculate the L / H ratio and L / P ratio. The data related to the L / H ratio and L / P ratio are summarized in Table 5 below.

[0221] In Table 5, levels 5 and 6 correspond to instances, and contrast corresponds to comparative instances.

[0222] [Table 5]

[0223]

[0224] The laminates obtained in the above manner are each cut into 0.8 mm wide slices. Preparation Figure 1 The heated non-burning smoking product shown is as follows. The tobacco segment 20A is 20 mm long, the cooling section 20B is 20 mm long, and the filter section 20C is 7 mm long. Each tobacco segment 20A is filled with 0.3 g of diced tobacco. After filling with the diced tobacco, a mint flavor is added to each tobacco segment 20A (flavor section) in an equal amount (500 ppm) using a microsyringe.

[0225] 4-2-2. Sensory evaluation

[0226] The smoking product was heated using a heating device (Ploom X, manufactured by Japan Tobacco Company), and the smoking was evaluated by a panel of 10 trained experts. The proof / intensity of the menthol flavor during smoking was evaluated on a five-point scale. The results are shown in Table 6 below.

[0227] 1. It exhibited a very poor mint aroma.

[0228] 2. Exhibited a poor mint aroma.

[0229] 3 Standards

[0230] 4. It exhibits a pleasant minty aroma.

[0231] 5. It exhibits a very nice minty aroma.

[0232] [Table 6]

[0233]

[0234] As shown in Table 6, the extracts from dried green leaves (levels 5 and 6) exhibited a better mint flavor than the extracts from dried leaves of common Burley tobacco (control).

[0235] As for extracts from dried green leaves, the hexane extract (level 6) exhibits a slightly better minty flavor than the ethyl acetate extract (level 5).

[0236] List of reference numerals

[0237] 10 Heating device

[0238] 11 body

[0239] 12 heaters

[0240] 13 Metal pipes

[0241] 14 battery cells

[0242] 15 Control Unit

[0243] 16 recess

[0244] 17 Ventilation holes

[0245] 20 Heated tobacco products that do not burn

[0246] 20A Tobacco Section

[0247] 20B Cooling Section

[0248] 20C Filter Section

[0249] 21 Tobacco Filling Materials

[0250] 22 Packages

[0251] 23 Paper tubes

[0252] 24 piercings

[0253] 25 First paragraph

[0254] 25a First Filling Layer

[0255] 25b Inner rod wrapping

[0256] 26 Second paragraph

[0257] 26a Second Filling Layer

[0258] 26b Inner rod wrapping

[0259] 27. Outer bar wrapping

[0260] 28. Suction nozzle liner.

Claims

1. A tobacco extract, wherein H is the total peak area of ​​components having a retention index (RI) of 1800-3100 in gas chromatography, and When L is the total peak area of ​​the component with an RI of 1365 or greater and less than 1800, then It satisfies 0 < L×10 / H ≤ 0.

55.

2. The tobacco extract as described in claim 1, wherein, It satisfies 0 < L×10 / H ≤ 0.

30.

3. The tobacco extract as described in claim 1 or 2, wherein, When P is the peak area of ​​phytol with an RI of 2114, then It satisfies 0 < L / P ≤ 1.

2.

4. A tobacco filling material comprising (A) a tobacco extract as described in any one of claims 1 to 3.

5. The tobacco filling material as claimed in claim 4, wherein the tobacco filling material contains 0.1-5 wt% of (A).

6. The tobacco filling material as claimed in claim 4 or 5, further comprising (B) non-pulp fibers and (C) adhesive.

7. The tobacco filling material as claimed in claim 6, wherein the tobacco filling material contains a total of 15-50 wt% of (B) and (C).

8. The tobacco filling material according to any one of claims 4 to 7, further comprising (D) an aerosol source.

9. The tobacco filling material as claimed in claim 8, wherein the tobacco filling material contains 10-60 wt% (D).

10. A heated non-burning smoking article comprising the tobacco filling material as described in any one of claims 4 to 9.

11. A method for producing a tobacco extract as described in any one of claims 1 to 3, the method comprising: (1) Steps for preparing raw materials derived from tobacco; (2) Provide the raw material for use in the solid-liquid extraction step using an organic solvent; (3) The step of recovering the organic phase from step (2); and (4) The step of obtaining the tobacco extract by removing the solvent from the organic phase.

12. The method of claim 11, further comprising: The steps of preparing tobacco-derived raw materials by feeding harvested tobacco leaves to one or more of the following drying steps: (i) The step of drying these tobacco leaves from the initial stage at a relative humidity of 15%-70% and a temperature of 35°C-80°C for 40-100 hours; and (ii) The procedure of drying these tobacco leaves using microwave.

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