Aerosol-generating article

Abstract

An aerosol-generating article provided with an aerosol-generating unit that includes (A) an aerosol-generating composition and (B) a wrapper for packaging the composition, wherein the (A) aerosol-generating composition includes a base material and an additive, the additive includes (A1) an aerosol source, the amount of the additive is 0.4-3.5 parts by weight per 1 part by weight of the base material, the additive includes 30-80 wt% of the (A1) aerosol source based on the aerosol-generating composition, and the (B) wrapper has a multilayer structure including an aluminum layer.

Description

Aerosol products

[0001] The present invention relates to aerosol products.

[0002] Various aerosol products have been proposed. For example, Patent Document 1 discloses an aerosol product including a homogenized sheet made from a non-tobacco plant. Patent Document 2 discloses an aerosol product including a film-like aerosol-generating material. Patent Document 3 discloses an aerosol-generating article including an aerosol-generating substrate including an absorbent body impregnated with an aerosol-forming liquid substance.

[0003] Special table 2023-516960 Publication Special table 2022-528221 Publication Special table 2021-528086

[0004] When an aerosol-generating composition contains a large amount of aerosol-generating base material, the rod portion of the aerosol product swells during storage, resulting in product defects. While measures such as wrapping the aerosol-generating composition in multiple layers have been considered to prevent the rod portion from swelling, this approach reduces the thermal conductivity of the rod portion and reduces the delivery of flavor components. In light of these circumstances, an object of the present invention is to provide an aerosol product that has excellent storage stability and delivery characteristics.

[0005] The inventors have found that the above-mentioned problem can be solved by using a wrapper with a multi-layer structure including an aluminum layer. That is, the above-mentioned problem is solved by the following invention. Aspect 1: An aerosol product comprising an aerosol-generating unit including (A) an aerosol-generating composition and (B) a wrapper that packages the composition, wherein the (A) aerosol-generating composition includes a substrate and an additive, and the additive includes (A1) an aerosol source, the amount of the additive being 0.4 to 3.5 parts by weight per 1 part by weight of the substrate, and the aerosol-generating composition contains 30 to 80% by weight of the (A1) aerosol source, based on the aerosol-generating composition, and the (B) wrapper has a multi-layer structure including an aluminum layer. Aspect 2: The aerosol product according to Aspect 1, wherein the (A) aerosol-generating composition includes a flavor material. Aspect 3: The aerosol product according to Aspect 1 or Aspect 2, wherein the (A) aerosol-generating composition does not include tobacco-derived materials. Aspect 4: The aerosol product according to any one of Aspects 1 to 3, wherein the (A) aerosol-generating composition comprises a thickener. Aspect 5: The aerosol product according to any one of Aspects 1 to 4, wherein the substrate comprises a sheet-like material. Aspect 6: The aerosol product according to any one of Aspects 1 to 5, wherein the (A) aerosol-generating composition is in the form of a crimped sheet, strand, or cut filler. Aspect 7: The aerosol product according to any one of Aspects 1 to 6, wherein the aerosol-generating composition has a tensile strength of 8 N / 50 mm or more when formed into a sheet. Aspect 8: The aerosol product according to any one of Aspects 1 to 7, wherein the (B) wrapper is aluminum-laminated paper. Aspect 9: The aerosol product according to any one of Aspects 1 to 8, wherein the roll hardness of the aerosol-generating portion is 80% or more. Aspect 10: The aerosol product according to any one of Aspects 1 to 9, wherein the circumferential length of the aerosol-generating portion is 22 mm or less.

[0006] An aerosol product can be provided that has excellent storage stability and delivery characteristics.

[0007] FIG. 1 shows one embodiment of an aerosol product. FIG. 2 shows the change in rod circumference of an aerosol product over time. FIG. 3 shows the change in hardness of an aerosol product over time. FIG. 4 shows the tensile strength of an aerosol-generating composition.

[0008] In this disclosure, "X to Y" includes the end values ​​X and Y. 1. Aerosol Product 1-1. Aerosol Generating Unit An aerosol product is an article that generates an aerosol that can be inhaled by heating. The aerosol product according to this embodiment comprises an aerosol generating unit that includes (A) an aerosol-generating composition and (B) a wrapper that packages the composition. The aerosol generating unit is preferably rod-shaped. The aerosol product according to this embodiment is also referred to as a non-combustion-heating aerosol product.

[0009] The length of the aerosol-generating unit in the longitudinal direction can be varied as appropriate to suit the size of the product, but is preferably 7 to 70 mm, and more preferably 10 to 25 mm. The aerosol product may also include multiple aerosol-generating units. When multiple aerosol-generating units are included, the aerosol-generating compositions contained in each aerosol-generating unit may be aerosol-generating compositions of the same composition or form, or may be aerosol-generating compositions of different compositions or forms.

[0010] (1) (A) Aerosol-generating composition The aerosol-generating composition includes a base material and an additive. The aerosol-generating composition is also called a filler. The content of the aerosol-generating composition in the aerosol-generating unit is not particularly limited, but is preferably 120 to 500 mg, and more preferably 200 to 500 mg, for example. The packing density of the aerosol-generating composition in the aerosol-generating unit is not particularly limited, but is preferably 200 to 1000 mg / cm. ３ and more preferably 250 to 600 mg / cm ３ and more preferably 300 to 500 mg / cm ３ In addition, when the aerosol product includes a plurality of aerosol generating units, the above numerical values ​​of each aerosol generating unit are adjusted so that the integrated aerosol generating unit consisting of the plurality of aerosol generating units satisfies the above numerical values.

[0011] The aerosol-forming composition may not contain a tobacco-derived material. The tobacco-derived material may be dried tobacco leaves or a material containing a tobacco raw material. The tobacco-derived material may be, for example, a crudely processed tobacco raw material such as shredded or powdered tobacco, or a processed and shaped tobacco raw material such as a tobacco extract or homogenized sheet. However, in an embodiment in which the aerosol-forming composition does not contain a tobacco-derived material, the active ingredient (A2) (preferably nicotine) described below may be derived from tobacco.

[0012] Additives Additives are materials carried on a substrate in the aerosol-forming composition. Additives include (A1) an aerosol source.

[0013] (A1) Aerosol Source The aerosol source is a material that vaporizes upon heating and cools to generate an aerosol, or that generates an aerosol by atomization. When the aerosol-generating composition contains an aerosol source, a sufficient amount of smoke can be achieved. Known aerosol sources can be used, including polyhydric alcohols such as glycerin, vegetable glycerin, propylene glycol (PG), triethyl citrate (TEC), and triacetin. The amount of the aerosol source in the composition is 30 to 80 wt%, preferably 35 to 70 wt%, and more preferably 40 to 60 wt%. If the amount of the aerosol source exceeds the upper limit, the handleability of the aerosol-generating composition may decrease, while if it is below the lower limit, the perceived smoke intensity may decrease. Water is not an aerosol source.

[0014] (A2) Active Component The additive may contain an active component. The active component is a physiologically active component, preferably nicotine. Nicotine may be contained in the aerosol-generating composition in the form of nicotine alone, or in the form of a nicotine-containing raw material. When nicotine is used in the form of nicotine alone, a purified nicotine preparation or an extract extracted from tobacco material may be used. The nicotine-containing raw material refers to a raw material containing nicotine, such as a nicotine salt or stabilized nicotine. From the viewpoint of smoking taste, the nicotine salt is preferably a salt of nicotine with an organic acid. Preferred organic acids include, for example, tartaric acid, citric acid, lactic acid, benzoic acid, levulinic acid, acetic acid, and pyruvic acid. From the viewpoint of handleability, lactic acid, benzoic acid, levulinic acid, and pyruvic acid are particularly preferred. Examples of stabilized nicotine include nicotine-carrying substances such as nicotine supported on an ion exchange resin. The amount of the active ingredient in the composition is preferably 0.5 to 10% by weight, more preferably 0.8 to 5.0% by weight, and even more preferably 1.0 to 3.0% by weight. If the amount of the active ingredient exceeds the upper limit, the flavor and taste may be reduced, while if it is below the lower limit, the user's satisfaction may be reduced.

[0015] (A3) Flavoring Materials The additive may contain a flavoring material as a component that imparts a flavor to the product. The flavoring material may be a flavoring material derived from a non-tobacco plant or a known flavoring material conventionally used as a fragrance. Examples of flavoring materials derived from non-tobacco plants include aromatic plants such as herbs (mint, basil, thyme, coriander, rosemary, parsley, fennel, lemongrass, star anise, cinnamon, etc.) and tea leaves. The plant may also be selected from the "List of Natural Flavor Sources" (List of Dietary Supplements No. 337, 2010, Appendix 2). These plants may be dried, cut into pieces approximately 0.5-1.5 mm wide, and cut into pieces approximately 5-20 mm long for use. Liquid non-tobacco materials obtained by subjecting these non-tobacco plants to any process, such as extraction, distillation, or high-temperature / high-pressure treatment, may also be used.

[0016] The flavoring material may be a flavoring. A wide variety of flavoring ingredients, such as those described in "Collection of Well-Known and Commonly Used Techniques (Fragrances)" (published by the Japan Patent Office on March 14, 2007), "The Latest Encyclopedia of Flavors (Popular Edition)" (published on February 25, 2012, edited by Soichi Arai, Akio Kobayashi, Izumi Yajima, and Michiaki Kawasaki, Asakura Shoten), and "Tobacco Flavoring for Smoking Products" (published in June 1972 by RJ Reynolds Tobacco Company), can be used alone or in combination. Flavorings may be materials that impart a cooling or warming sensation, or may be flavorings such as sweet, sour, salty, umami, bitter, astringent, or rich. Menthol is a particularly preferred flavoring.

[0017] The content of the flavor material in the composition is preferably 0.5 to 10.0% by weight, more preferably 1.0 to 8.0% by weight, from the viewpoint of imparting a desired flavor and taste.

[0018] The additive essentially comprises (A1) an aerosol source, and further comprises, as optional components, (A2) an active ingredient or (A3) a flavor ingredient. In one embodiment, the additive consists of (A1) the aerosol source, and in another embodiment, the additive consists of (A1) the aerosol source and one or two of the optional components.

[0019] [Substrate] The substrate can impart shapeability to the aerosol-forming composition. Examples of substrates include sheet-like materials. The sheet-like material is preferably composed of paper, plastic film, cellulose acetate, nonwoven fabric, or paraffin paper. When using paper as the sheet-like material, it is preferable to use porous paper, particularly from the viewpoint of supporting the additives. The air permeability of such paper materials is, for example, 2,000 to 15,000 CU, more preferably 3,000 to 12,000 CU. The basis weight of the paper material is 20 to 40 g / m ２ It is preferable that the density is 25 to 35 g / m ２ is.

[0020] To improve physical properties, the substrate may contain fillers or auxiliary agents, or may be coated on its surface. Examples of auxiliary agents that can be used include aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents, as well as papermaking additives such as dyes, pH adjusters, defoamers, pitch control agents, and slime control agents. For example, adding a wet strength agent can impart water resistance to the substrate. Adding a sizing agent can also inhibit the exudation of additives.

[0021] From the viewpoint of formability, the content of the substrate in the composition is preferably 10.0 to 70.0 wt %, 20.0 to 65.0 wt %, 25.0 to 60.0 wt %, or 35.0 to 50.0 wt %. Furthermore, the substrate can carry a large amount of additives. In this case, the weight ratio of the substrate to the additives in the aerosol-generating composition is 2:1 to 2:7, more preferably 1:1 to 1:2. That is, in the aerosol-generating composition, the weight ratio of the additives carried by the substrate per unit weight part (1 part by weight) of the substrate is 0.4 to 3.5 parts by weight, more preferably 0.5 to 3.0 parts by weight, and even more preferably 0.6 to 2.5 parts by weight or 0.6 to 2.0 parts by weight. By carrying a large amount of additives in the substrate, sufficient delivery characteristics can be exhibited without impairing the formability of the aerosol-generating composition.

[0022] [Thickener] The aerosol-forming composition preferably contains a thickener. The thickener increases the viscosity of the aerosol-forming composition, thereby suppressing the exudation of the additives. The exudation suppression effect is particularly pronounced when the thickener is used in a liquid state such as an aqueous solution. Known thickeners can be used, and examples include polysaccharide-derived materials. Examples of polysaccharide-derived materials include gellan gum, guar gum, xanthan gum, carrageenan, pectin, agar, and cellulose derivatives such as CMC (carboxymethylcellulose), CMC-Na (carboxymethylcellulose sodium salt), and HPMC (hydroxypropylmethylcellulose). Among these, agar is preferred because it does not affect flavor and is easy to handle. The content of the thickener in the composition is preferably 0.5 to 10.0 wt %, more preferably 1.0 to 4.5 wt %. The thickener may be used together with approximately 10 to 20 wt % water.

[0023] (2) (B) Wrapper The wrapper has a multi-layer structure including an aluminum layer. The number of layers may be two or more, or three or more. Of these, two or three layers are preferred, but two layers are preferred from the viewpoint of ease of handling. The wrapper is preferably aluminum-laminated paper. Aluminum-laminated paper is a laminate of paper and aluminum foil. As the aluminum-laminated paper, one that is commonly used in the relevant field can be used. There are no limitations on its thickness, but it is preferably 30 to 60 μm, more preferably 40 to 55 μm. There are no limitations on the thickness of the aluminum foil, but it is preferably 5 to 10 μm. There are no limitations on the basis weight of the aluminum-laminated paper, but it is preferably 30 to 60 g / m ２ , more preferably 40 to 55 g / m ２The tensile strength (ISO 1924-2) of the aluminum-laminated paper is preferably 10 N / 15 mm or more, more preferably 12 N / 15 mm or more. There is no upper limit, but in one embodiment, it is 20 N / 15 mm or less. By using aluminum-laminated paper with such physical properties as a wrapper, it is possible to suppress fluctuations in perimeter and decreases in hardness due to expansion of an aerosol-generating composition that contains a particularly large amount of aerosol source, thereby improving product stability. Furthermore, by using aluminum-laminated paper as a wrapper, it is possible to suppress seepage of additives onto the surface of an article, thereby improving appearance quality.

[0024] The aluminum-laminated paper preferably has two or three layers, but two layers is more preferable from the viewpoint of handleability, etc. In this case, the aluminum layer made of aluminum foil may be present in any layer from the viewpoints of manufacturability, handleability, appearance quality, function, etc. For example, it may be present in an inner layer that directly contacts the aerosol-generating composition, or in an outer layer that does not directly contact the aerosol-generating composition. In particular, from the viewpoint of appearance quality, it is preferable that the aluminum layer made of aluminum foil is present in the innermost layer that directly contacts the aerosol-generating composition. The aluminum layer or paper layer in the aluminum-laminated paper may contain fillers or auxiliary agents. Furthermore, the surface of the aluminum-laminated paper may be coated.

[0025] The wrapper may be a combination of paper and aluminum-laminated paper. In this case, the paper and aluminum-laminated paper may be used in a laminated state, or separate pieces of paper may be wrapped and glued together during production. In this case, from the viewpoint of appearance quality, it is preferable that the outermost layer be a paper layer. Furthermore, as long as the effects of the invention are not impaired, another independent wrapper or the like may be present between the aerosol-forming composition and the wrapper.

[0026] (3) Form The form of the aerosol-generating composition is not limited, but is preferably a sheet, strand, or cut filler. The dimensions of these may be those typically employed in the art. The number of sheets of aerosol-generating composition filled in the aerosol-generating unit may be one or more. The type of aerosol-generating composition filled in the aerosol-generating unit may be one type, or two or more types having different compositions or manufacturing methods may be used in combination. When the aerosol-generating unit contains multiple aerosol-generating compositions, the aerosol-generating compositions may all have the same composition or physical properties, or some or all of them may have different compositions or physical properties. The aerosol-generating compositions may be arranged in the aerosol-generating unit in any form. Examples include a crimped sheet, a plurality of aerosol-generating compositions arranged in a concentric pile, strands of aerosol-generating compositions arranged so as to be oriented in the longitudinal direction of the aerosol product, and randomly arranged strands of aerosol-generating compositions.

[0027] (4) Properties The aerosol-forming composition, when formed into a sheet, preferably has a tensile strength of 8 N / 50 mm or greater, as measured in accordance with ISO 1924-2 (standard) using an uncrimped sheet.

[0028] The circumferential length of the aerosol generating unit is preferably 35 mm or less, more preferably 25 mm or less, and even more preferably 22 mm or less. There is no lower limit, but it is preferably 15 mm or more. The winding hardness of the aerosol generating unit is preferably 78% or more, more preferably 80% or more. For example, preferred winding hardness ranges include 78 to 92%, 80 to 90%, and 82 to 89%. Winding hardness is measured by the following method. [Hardness] The aerosol generating unit is placed on a substrate so that its longitudinal direction is horizontal, and its height Ds is measured. A φ12 pressure head with a 300 g weight is used to apply a load to the side of the aerosol generating unit for 10 seconds to compress it. The height Dd of the aerosol generating unit in the compressed state is measured. The hardness H (%) is calculated using the following formula: H (%) = Dd / Ds × 100

[0029] The aerosol generating unit according to this embodiment has the characteristic of undergoing little change in its characteristics and shape over time. The change in its characteristics and shape over time is measured by the method described below. The rate of change in hardness ΔH is preferably −2% to +2%. The rate of change in circumferential length ΔC is preferably −1% to +1%.

[0030] [Rate of change in hardness] The hardness of the aerosol-generating unit (number of samples: n) that has been conditioned for a maximum of 72 hours (3 days) in an environment of 22°C and 60% relative humidity is measured using the method described above, and the average value is set as the hardness (I) of the aerosol-generating unit before storage. Thereafter, the aerosol-generating unit (number of samples: n) that has been stored for a maximum of 30 days at 22°C and 60% relative humidity is measured using the same method described above, and the average value is set as the hardness (II) of the aerosol-generating unit after storage. The rate of change in hardness (ΔH) of the aerosol-generating unit is calculated using the following formula. n is preferably 2 to 30, more preferably 10 to 20. ΔH = ((II) - (I)) / (I) x 100

[0031] [Rate of Change in Peripheral Length] The periphery of an aerosol-generating unit (number of samples: n) conditioned for a maximum of 72 hours (3 days) in an environment of 22°C and 60% relative humidity is measured using a measuring device (trade name: SODIMAX, manufactured by SODIM), and the average value is set as the periphery length (i) of the aerosol-generating unit before storage. Thereafter, the aerosol-generating unit (number of samples: n) stored for a maximum of 30 days at 22°C and 60% relative humidity is similarly measured using a measuring device (trade name: SODIMAX, manufactured by SODIM), and the average value is set as the periphery length (ii) of the aerosol-generating unit after storage. The rate of change (ΔC) of the periphery length of the aerosol-generating unit is calculated using the following formula. n is preferably 2 to 30, more preferably 20. ΔC = ((ii) - (i)) / (i) x 100

[0032] 1-2. Other Components The aerosol product according to this embodiment may include a tip sealing member (FP), a hollow portion (PT), or a mouthpiece in addition to the aerosol-generating portion. One embodiment of the aerosol product is shown in FIG. 1. In the figure, reference numeral 1 denotes the aerosol product, 10 denotes the aerosol-generating portion, 12 denotes the tip sealing member, 14 denotes the hollow portion, 16 denotes the mouthpiece, and W denotes a wrapper having a multilayer structure including an aluminum layer. In the figure, the wrapper W wraps only the aerosol-generating portion 10, but the wrapper W may extend to a component adjacent to the aerosol-generating portion 10. Also, tipping paper for connecting multiple components is omitted from the illustration.

[0033] The shape of the aerosol production product may be as known, and each component may be made of a known material. In one embodiment, the diameter of the aerosol production product is 5 to 10 mm. In one embodiment, the length of the aerosol-generating portion is 10 to 70 mm. In one embodiment, the length of the tip sealing member is 1 to 10 mm. In one embodiment, the length of the hollow portion is 5 to 30 mm. In one embodiment, the length of the mouthpiece is 15 to 40 mm.

[0034] The length of the aerosol product in the longitudinal direction is not particularly limited, but is, for example, typically 40 mm or more and preferably 100 mm or less. The diameter of the product is also not particularly limited, but is, for example, typically 5 mm or more and more preferably 8 mm or less.

[0035] 3. Manufacturing Method The aerosol product is manufactured by a known method. For example, the aerosol-generating unit is manufactured by impregnating or injecting an additive into a substrate and then wrapping the substrate with a wrapper. Subsequently, other components are prepared, and the aerosol-generating unit and the other components are joined with one or more sheets of tipping paper, thereby manufacturing the aerosol product. Known paper may be used as the tipping paper. For the purpose of improving physical properties, the tipping paper may contain fillers or additives, or the surface of the tipping paper may be coated. For the purpose of decoration, the tipping paper may be embossed or printed. Furthermore, the above-mentioned wrapper may also be used as the tipping paper used to join the aerosol-generating unit and the other components. In this case, it is preferable that the aerosol-generating unit is covered with the wrapper used as the tipping paper.

[0036] Embodiments are described below. Aspect 1: An aerosol product comprising an aerosol-generating unit including (A) an aerosol-generating composition and (B) a wrapper packaging the composition, wherein the (A) aerosol-generating composition includes a substrate and an additive, and the additive includes (A1) an aerosol source, the amount of the additive being 0.4 to 3.5 parts by weight per 1 part by weight of the substrate, and the (B) wrapper contains 30 to 80% by weight of the (A1) aerosol source based on the aerosol-generating composition, and the (B) wrapper has a multi-layer structure including an aluminum layer. Aspect 2: The aerosol product according to Aspect 1, wherein the (A) aerosol-generating composition includes a flavor material. Aspect 3: The aerosol product according to Aspect 1 or 2, wherein the (A) aerosol-generating composition does not include tobacco-derived materials. Aspect 4: The aerosol product according to any one of Aspects 1 to 3, wherein the (A) aerosol-generating composition includes a thickener. Aspect 5: The aerosol product according to any one of Aspects 1 to 4, wherein the substrate comprises a sheet-like material. Aspect 6: The aerosol product according to any one of Aspects 1 to 5, wherein the (A) aerosol-generating composition is in the form of a crimped sheet, strand, or cut filler. Aspect 7: The aerosol product according to any one of Aspects 1 to 6, wherein the aerosol-generating composition has a tensile strength of 8 N / 50 mm or more when formed into a sheet. Aspect 8: The aerosol product according to any one of Aspects 1 to 7, wherein the (B) wrapper is aluminum-laminated paper. Aspect 9: The aerosol product according to any one of Aspects 1 to 8, wherein the roll hardness of the aerosol-generating portion is 80% or more. Aspect 10: The aerosol product according to any one of Aspects 1 to 9, wherein the circumferential length of the aerosol-generating portion is 22 mm or less.

[0037] [Example 1, Comparative Example 1] 1. Preparation of Heated Aerosol Product A 20 mm long acetate filter segment (AF), a 20 mm long paper tube (PT), and a 20 mm long paper filter segment (PF) were prepared. An aqueous solution containing nicotine as the active ingredient, glycerin and propylene glycol as aerosol sources, and a flavoring material was prepared. The aqueous solution was injected into the substrate of the paper filter segment using a microsyringe to form an aerosol generating section. The amount of each component per segment was as follows: substrate: 120 mg, nicotine: 3 mg, glycerin: 60 mg, propylene glycol: 14.4 mg, and flavoring material: 2.5 mg.

[0038] Next, the paper filter segments were wrapped in various wrappers shown in Table 2, and each segment was connected with tipping paper to produce a heated aerosol product. The heated aerosol product had the following structure: (distal end) PF (aerosol generating part) / PT / AF (mouthpiece end) Diameter: approximately 7 mm

[0039] 2. Delivery Evaluation While heating the aerosol generating unit with a heating device (trade name: Ploom X, manufactured by Japan Tobacco Inc.), automatic smoking was performed using an automatic smoking machine (Borgwaldt's "Analytical Vaping Machine"). The inhalation conditions were based on the HCl method (Canadian compulsory smoking conditions), with 55 ml / 2 seconds per puff (30-second intervals for each puff, i.e., 2 seconds of inhalation and 28 seconds of waiting). A total of 11 puffs were taken, and the amounts of glycerin and nicotine captured in the glass fiber filter were quantified. Specifically, the captured components were immersed in 10 ml of methanol as an extraction solvent and shaken and extracted at 200 rpm for 10 minutes. The resulting extract was analyzed by GC under the following conditions to quantify the amount of nicotine. Three measurements for each sample were averaged, and the average value was used as an index of delivery per stick. The results are shown in Table 2.

[0040] [Nicotine Extraction] 100 mg ± 5 mg of sample was weighed into a glass bottle. 3.75 mL of aqueous sodium hydroxide solution (10 w / w%) and 5 mL of hexane were added to the bottle, and the mixture was shaken (200 rpm, 1 hour) to perform extraction. 0.05 w / v% n-heptadecane was added to the hexane as an internal standard. After shaking, the hexane layer was dispensed into vials, and nicotine was analyzed using GC-FID.

[0041] [GC conditions] As shown in the table below.

[0042]

[0043]

[0044] The article of Example 1 exhibited delivery characteristics comparable to the standard article of Comparative Example 1-1.

[0045] [Example 2, Comparative Example 2] A porous paper material crimped to a depth of 1 mm was used as the substrate. 120 mg of the substrate was impregnated with an aqueous solution containing a thickener (agar) and an aerosol source to prepare an aerosol-generating composition. The composition was then packaged in the wrapper shown in Table 3 to prepare a rod-shaped aerosol-generating unit. The aerosol-generating unit was stored in an environment of 22°C and 60% relative humidity for up to 30 days, and changes in each physical property over time were measured.

[0046] Example 3 A porous paper material crimped to a depth of 1 mm was used as the substrate. 88.2 mg of the substrate was impregnated with an aqueous solution containing a thickener (agar), an aerosol source (glycerin), an active ingredient (nicotine), and a flavoring to prepare a simulated aerosol-generating composition. The composition was then packaged in the wrapper shown in Table 3 to prepare a rod-shaped aerosol-generating unit. The aerosol-generating unit was stored in an environment of 22°C and 60% relative humidity for up to 30 days, and changes in each physical property over time were measured.

[0047] The rod-shaped aerosol-generating parts were evaluated as follows. Pre-storage evaluation: Eight aerosol-generating parts, designated A to H below, were conditioned for 0 to 2 days in an environment at 22°C and 60% relative humidity, and the shape stability and hardness of the aerosol-generating parts were measured. The measurement items and methods were as described below. 20 samples were evaluated for each level. Post-storage evaluation: Eleven aerosol-generating parts, designated A to K below, were stored in an environment at 22°C and 60% relative humidity for up to 30 days, and the shape stability and hardness of the aerosol-generating parts were evaluated. 20 samples were evaluated for each level. Tensile strength of aerosol-generating composition: Three samples were evaluated for each of the four levels, designated C to F below, which differ in the composition and amount of the impregnated aqueous solution. Table 3 shows the type of wrapper and the amount of each component. The results of the changes in each physical property over time are shown in Figures 2 and 3, and the tensile strength is shown in Figure 4. The changes in circumference and hardness over time for Example 3 are shown in Table 4.

[0048]

[0049]

[0050] The aerosol-generating parts of the examples had excellent rod shape stability and hardness. Therefore, the results of Examples 1 to 3 clearly demonstrate that the aerosol products of this embodiment have excellent storage stability and delivery characteristics.

[0051] [Evaluation method] (1) Rod outer periphery length The circumference (outer periphery) of the aerosol generating part was measured using a measuring device (product name: SODIMAX, manufactured by SODIM). If the rate of change in the outer periphery length exceeded ±1%, it was determined that the shape stability of the aerosol generating part was poor.

[0052] (2) Hardness The aerosol generating unit was placed on a substrate so that its longitudinal direction was horizontal, and its height Ds was measured. A φ12 pressure head with a 300 g weight was used to apply a load to the side of the aerosol generating unit for 10 seconds to compress it. Immediately after compression, the height Dd of the aerosol generating unit was measured. The hardness H (%) was calculated using the following formula: H (%) = Dd / Ds × 100. If the rate of change in hardness exceeded ±2%, the shape stability of the aerosol generating unit was determined to be poor.

[0053] (3) Tensile Strength The wrapper was removed from the aerosol generating unit, and the substrate containing the active ingredient and other components was removed and weighed. The substrate was divided along a plane parallel to the longitudinal direction to prepare samples. The weight of the sample was measured, and the theoretical value of the sample width was calculated. The sample was cut along a plane perpendicular to the longitudinal direction to obtain a roughly semi-cylindrical sample 20 mm long. The tensile strength of the 20 mm long sample was measured using a rheometer (Sun Scientific). The obtained value was converted to a width of 50 mm to obtain the tensile strength of the aerosol generating composition.

[0054] REFERENCE SIGNS LIST 1 aerosol product 10 aerosol generating section 12 tip sealing member 14 hollow section 16 mouthpiece W wrapper

Claims

1. An aerosol product comprising an aerosol-generating unit including (A) an aerosol-generating composition and (B) a wrapper that packages the composition, wherein the (A) aerosol-generating composition includes a base material and an additive, and the additive includes (A1) an aerosol source, the amount of the additive is 0.4 to 3.5 parts by weight per 1 part by weight of the base material, the aerosol product contains 30 to 80% by weight of the (A1) aerosol source based on the aerosol-generating composition, and the (B) wrapper has a multi-layer structure that includes an aluminum layer.

2. The aerosol product of claim 1, wherein the (A) aerosol-forming composition comprises a flavoring material.

3. The aerosol product of claim 1 or 2, wherein the (A) aerosol-forming composition does not contain tobacco-derived materials.

4. The aerosol product of any one of claims 1 to 3, wherein the (A) aerosol-forming composition includes a thickener.

5. An aerosol product according to any one of claims 1 to 4, wherein the substrate comprises a sheet-like material.

6. The aerosol product of any one of claims 1 to 5, wherein the (A) aerosol-forming composition is in the form of a crimped sheet, strand, or cut filler.

7. The aerosol product according to any one of claims 1 to 6, wherein the aerosol-forming composition when formed into a sheet has a tensile strength of 8 N / 50 mm or more.

8. The aerosol product according to any one of claims 1 to 7, wherein the (B) wrapper is an aluminum-laminated paper.

9. The aerosol product according to any one of claims 1 to 8, wherein the aerosol-generating portion has a winding hardness of 80% or more.

10. The aerosol product according to any one of claims 1 to 9, wherein the circumferential length of the aerosol generating portion is 22 mm or less.

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