Cylindrical heated tobacco products

Abstract

To provide a smoking article filled with an appropriate amount of reconstituted tobacco. [Solution] The cylindrical heated tobacco product consists of multiple sections with diameters of 5.4 mm to 7.8 mm, and includes at least one filter section with a length of 4 mm to 8 mm and at least one tobacco section with a length of 8 mm to 18 mm.When irradiated with microwaves at a frequency of 8 GHz, the microwaves that pass through the tobacco section exhibit a phase change of -0.25 (rad) to 0.02 (rad).

Description

[Technical field]

[0001] The present invention relates to a cylindrical heated tobacco product. [Background technology]

[0002] Smoking articles currently available on the market are comprised of an elongated cylindrical container filled with reconstituted tobacco (e.g., in the form of granules). In the manufacture of such smoking articles, there is a need to strictly control the amount of reconstituted tobacco, particularly the reconstituted tobacco granules, that is filled.

[0003] Conventionally, in the cigarette manufacturing process, a device is known that measures the amount of tobacco shreds filled from the electrostatic capacitance between a pair of electrostatic electrodes arranged opposite each other across a tobacco rod (see, for example, Patent Document 1). Also known is a device that irradiates a microwave onto an object to be measured and evaluates the characteristics of the object based on the amplitude and phase ratio of the microwave that has passed through the object (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-346747 [Patent Document 2] JP 2015-161597 A Summary of the Invention [Problem to be solved by the invention]

[0005] The reconstituted tobacco contained in heated tobacco products contains various additives, which are different from the tobacco raw materials used in conventional cigarettes. The various additives change the amplitude and phase of the irradiated microwaves, causing disturbances. Conventional methods cannot eliminate the disturbances.

[0006] The tobacco section and tobacco rod of a heat-not-burn tobacco product, which is filled with reconstituted tobacco, has a higher density of tobacco raw materials and a higher packing density of tobacco raw materials than the tobacco rod of a conventional cigarette. Therefore, the method of measuring the density of tobacco raw materials using microwave irradiation, which is known for conventional cigarettes, cannot be applied to such heat-not-burn tobacco products. In particular, the microwave frequency band is different.

[0007] In a heated tobacco product filled with reconstituted tobacco, a tobacco section containing reconstituted tobacco as a tobacco raw material, a material section not containing tobacco raw material, and a filter section are successively arranged. In the manufacturing process of a heated tobacco product, the material section not containing tobacco raw material and the filter section change the amplitude and phase of the irradiated microwaves to values ​​different from those of the tobacco raw material, causing disturbance. Conventional methods cannot eliminate the disturbance.

[0008] In heated tobacco products filled with reconstituted tobacco, the amount of reconstituted tobacco, reconstituted tobacco granules, and reconstituted tobacco sheets as tobacco raw materials is likely to be linked to the level of sensory and smoking experience that consumers get from enjoying one heated tobacco product, and the number of times that consumers can enjoy one heated tobacco product, so it is necessary to control the amount of tobacco raw materials for each stick and guarantee that it is within the standard. Because conventional methods could not be applied and there was no density measurement method that could handle the extremely high manufacturing speed (1500 sticks / min or more) of heated tobacco products, it was not possible to guarantee that the amount of tobacco raw materials in heated tobacco products filled with reconstituted tobacco was within the appropriate amount.

[0009] Therefore, there is a demand for heated tobacco products that are filled with reconstituted tobacco and in which the amount of tobacco raw material is quality controlled to be within an appropriate amount.

[0010] The present invention has been made in view of the above circumstances, and one of its objects is to provide a smoking article filled with an appropriate amount of reconstituted tobacco, in particular reconstituted tobacco granules. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, one aspect of the present invention is a cylindrical heated tobacco product consisting of multiple sections with diameters of 5.4 mm to 7.8 mm, including at least one filter section with a length of 4 mm or more and 8 mm or less, and at least one tobacco section with a length of 8 mm or more and 18 mm or less, and when irradiated with microwaves having a frequency of 8 GHz, the microwaves transmitted through the tobacco sections exhibit a phase change of -0.25 (rad) to 0.02 (rad).

[0012] Another aspect of the present invention is a cylindrical heated tobacco product consisting of multiple sections with diameters of 5.4 mm to 7.8 mm, including at least one filter section with a length of 4 mm or more and 8 mm or less, and at least one tobacco section with a length of 8 mm or more and 18 mm or less, wherein the tobacco section imparts a phase change of -15.84 (deg) or more and -5.88 (deg) or less to the microwaves when irradiated with microwaves having a frequency of 8 GHz.

[0013] Another aspect of the present invention is a cylindrical heated tobacco product consisting of multiple sections with diameters of 5.4 mm to 7.8 mm, including at least one filter section with a length of 4 mm or more and 8 mm or less, and at least one tobacco section with a length of 8 mm or more and 18 mm or less, wherein the tobacco section imparts a phase change to the microwaves of -15.84 (deg) or more and less than -5.88 (deg) when irradiated with microwaves having a frequency of 8 GHz.

[0014] Another aspect of the present invention is a cylindrical heated tobacco product consisting of multiple sections with diameters of 5.4 mm to 7.8 mm, including at least one filter section with a length of 4 mm or more and 8 mm or less, and at least one tobacco section with a length of 8 mm or more and 18 mm or less, wherein the tobacco section imparts a phase change of -15.84 (deg) or more and -7.32 (deg) or less to the microwaves when irradiated with microwaves having a frequency of 8 GHz.

[0015] In another aspect of the present invention, in the above aspect, the filter sections and the tobacco sections are arranged alternately in the longitudinal direction.

[0016] In another aspect of the present invention, in the above aspect, the tobacco section comprises reconstituted tobacco or reconstituted tobacco granules.

[0017] In another aspect of the present invention, in the above aspect, the tobacco section does not contain shredded tobacco.

[0018] In another aspect of the present invention, in the above aspect, the tobacco section does not contain expanded tobacco.

[0019] In another aspect of the present invention, in the above aspect, the tobacco section does not contain reconstituted tobacco. Effect of the Invention

[0020] According to the present invention, it is possible to provide a smoking article that is filled with an appropriate amount of reconstituted tobacco. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram of a cylindrical heated tobacco product according to one embodiment of the present invention. [Diagram 2] FIG. 1 is a schematic diagram of a measuring device for measuring the weight of reconstituted tobacco filled in a tobacco section of a smoking article according to one embodiment of the present invention. [Diagram 3] This is an example of the results of measuring a smoking article using microwaves. [Figure 4] This is an example of the results of measuring a smoking article using microwaves. [Diagram 5] This is an example of the results of measuring a smoking article using microwaves. [Figure 6] 1 is an example of an arrangement for measuring smoking articles using microwaves. [Figure 7] 1 is a graph plotting the correlation between reconstituted tobacco granule loading and amount of phase change. [Figure 8A] 1 is a normal probability plot of the amount of phase change and its expected value for sample B-1. [Figure 8B] 1 is a normal probability plot of the amount of phase change and its expected value for sample B-2. [Figure 8C] 1 is a normal probability plot of the amount of phase change and its expected value for sample B-3. [Figure 8D] 1 is a normal probability plot of the amount of phase change and its expected value for sample B-4. [Figure 8E] 1 is a normal probability plot of the phase change amount and its expected value for sample B-5. [Figure 8F] 1 is a normal probability plot of the amount of phase change and its expected value for sample B-6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0023] 1 is a schematic diagram of a cylindrical heated tobacco product according to one embodiment of the present invention, showing a cross section along the longitudinal direction. The heated tobacco product 100 has a cylindrical shape with a diameter of, for example, 5.4 mm to 7.8 mm, and is configured with a plurality of filter sections 120 and a plurality of tobacco sections 140 arranged alternately in the longitudinal direction. The cylindrical side surfaces of the filter sections 120 and the tobacco sections 140 are integrally covered with an exterior paper 160 to prevent the filter sections 120 and the tobacco sections 140 from coming apart.

[0024] The filter section 120 is made of, for example, acetate fiber, and functions to filter the aerosol generated from the tobacco section 140. The filter section 120 may additionally contain activated carbon. The length of the filter section 120 in the longitudinal direction of the heated tobacco product 100 may be, for example, 4 mm or more and 8 mm or less.

[0025] The tobacco section 140 is constructed by filling a predetermined amount of reconstituted tobacco 145 into a hollow portion provided between two consecutive filter sections 120. The reconstituted tobacco 145 is a tobacco material obtained by once powdering dried leaf tobacco, kneading it with a binder such as polysaccharide or calcium carbonate, and then molding it again into a predetermined shape such as a sheet or granules. For example, the kneaded product of leaf tobacco powder and a binder is extruded to obtain granular reconstituted tobacco 145. The length of the tobacco section 140 in the longitudinal direction of the heated tobacco product 100 can be, for example, 8 mm or more and 18 mm or less.

[0026] Methods for producing reconstituted tobacco from tobacco leaf will now be described in more detail.

[0027] Leaf tobacco consists of the leaves, petioles, stems and flowers of the cultivated species Nicotiana tabacum and Nicotiana rustica, and the wild species Nicotiana. The Nicotiana tabacum species is broadly divided into three cultivated species: flue, burley and orient.

[0028] Cured tobacco is made by drying tobacco leaves. Cured tobacco leaves are the raw material for tobacco manufacturing. During the tobacco manufacturing process, cured tobacco leaves are separated into the lamina (leaf flesh and veins) and the stem (veins, petiole and stalk).

[0029] The mesophyll, some of the stems, petioles, and veins are cut into shredded tobacco, which retains the plant tissue and vascular structure of the tobacco leaf.

[0030] Expanded tobacco is made by expanding the stem, petiole, veins, and part of the leaf flesh through a compression and decompression process. Expanded tobacco is also shredded and mixed with shredded tobacco. In expanded tobacco, the plant tissue or vascular structure of the leaf tobacco is expanded and preserved.

[0031] During the tobacco manufacturing process, dried tobacco, shredded tobacco or expanded tobacco fragments or dust that are broken are dissolved, strained and regenerated into reconstituted tobacco or reconstituted tobacco sheets. Reconstituted tobacco is also shredded and mixed with shredded tobacco. In reconstituted tobacco, the plant tissue, vascular structure or cell wall structure of the leaf tobacco is preserved.

[0032] Homogenized tobacco is obtained by crushing, grinding and blending leaf tobacco, dried tobacco leaves, cut tobacco, expanded tobacco or reconstituted tobacco.

[0033] Homogenized tobacco is mixed with additives such as binders, gelling agents, cross-linking agents, flavorings, hydrophilic flavorings, lipophilic flavorings, viscosity modifiers, humectants, or reinforcing materials, and turned into a liquid, gel, sol, or soft solid slurry, which is then dried, dehydrated, paper-made, and extruded to obtain reconstituted tobacco.

[0034] Examples of binders and gelling agents that can be used include natural polymers, gelatin, chondroitin sulfate, polysaccharides and polysaccharide salts: alginate, carrageenan, gellan gum, guar gum, agarose, sorbitol, invert sugar, starch, dextrin, starch hydrolysate, and oxidized starch. Examples of crosslinking agents that can be used include inorganic salts, calcium salts, calcium carbonate, potassium salts, potassium carbonate, magnesium salts, magnesium carbonate, sodium salts, sodium carbonate, and triethyl citrate. Examples of flavorings that can be used include plant essential oils, leaf tobacco extracts, leaf tobacco grinds, menthol, synthetic flavorings, natural flavorings, and essential oils, and can be used regardless of whether they are lipophilic or hydrophilic. Examples of lipophilic flavorings include vanillin, ethyl vanillin, guarinalol, thymol, methyl salicylate, linalool, eugenol, menthol, clove, anise, cinnamon, bergamot oil, geranium, lemon oil, spearmint oil, and gingerol. Examples of hydrophilic flavorings include glycerin, propylene glycol, ethyl acetate, and isoamyl alcohol. Examples of viscosity modifiers include water, oils and fats, fatty acids, hydrophilic solvents, alcohol, ethanol, glycerin, and propylene glycol. Examples of humectants include water, glycerin, and propylene glycol. Examples of reinforcing materials include tobacco fiber, tobacco cellulose fiber, wood pulp, cellulose fiber, and non-tobacco cellulose fiber.

[0035] Reconstituted tobacco sheets are made by molding homogenized tobacco with binders, gelling agents, crosslinking agents, flavorings, and viscosity modifiers to form liquid or gel reconstituted tobacco slurry into sheets. Reconstituted tobacco sheets are made by straining the reconstituted tobacco slurry, and reconstituted tobacco slurry sheets (reconstituted tobacco cast sheets) are made by drying and dehydrating the reconstituted tobacco slurry spread on a flat plate.

[0036] Reconstituted tobacco granules are made by extruding homogenized tobacco and reconstituted tobacco slurry, which is a gel or soft solid made by kneading binders, gelling agents, crosslinking agents, flavorings, and viscosity modifiers, and then drying or pulverizing the extrudate, or by granulating the reconstituted tobacco slurry, which is a liquid, gel, sol, or soft solid.

[0037] Numerous reconstitution processes for producing homogenized sheets of tobacco material are known in the art, including, but not limited to, papermaking processes, e.g., of the type described in US-A-3,860,012, casting or "cast leaf" processes, e.g., of the type described in US-A-5,724,998, soft mass reconstitution processes, e.g., of the type described in US-A-3,894,544, and extrusion processes, e.g., of the type described in GB-A-983,928.

[0038] In general, the density of homogenized tobacco material sheets produced by the extrusion process and soft mass reconstitution process is greater than that of homogenized tobacco material sheets produced by the casting process. Reconstituted tobacco sheets and reconstituted tobacco granules have a large weight per unit volume (bulk density) or weight per unit area (basis weight) because the plant tissue and cell wall structure of the tobacco leaves are destroyed during the crushing and grinding process for homogenization, and additives are further loaded into the cell wall structure. For example, a reconstituted tobacco slurry sheet has a mass of approximately 100 g / m2 at room temperature of 26°C and humidity of 60%. 2 ~about 300g / m 2 For example, the reconstituted tobacco granules may have a bulk density of about 40 g / 100 ml to about 60 g / 100 ml under conditions of room temperature of 26° C. and humidity of 60%.

[0039] Reconstituted tobacco has inferior elasticity compared to shredded tobacco, expanded tobacco, and reconstituted tobacco because the plant tissue, vascular bundle structure, and cell wall structure of the tobacco leaves are lost through grinding, and the running direction of the cellulose fibers is disordered due to kneading. In particular, reconstituted tobacco granules are fragile granules with almost no elasticity.

[0040] The structure of a conventional cigarette and the structure of a heated tobacco product according to an embodiment of the present invention will be described below in comparison.

[0041] In conventional cigarettes, the tobacco rod is made by wrapping tobacco raw material in cigarette paper. The cigarette paper and tobacco raw material work together to resist external forces and maintain the structure of the tobacco rod. The cigarette paper bears the stress against tensile forces in the longitudinal direction, while the tobacco raw material bears the stress against compressive forces in the longitudinal direction and shear forces parallel to the plane transverse to the longitudinal axis, thereby maintaining the structure of the tobacco rod. The tobacco raw material is a mixture of fragments, and the elasticity of each individual fragment bears the stress. Tobacco rods are generally between 40mm and 100mm in length.

[0042] The tobacco raw materials contained in the tobacco rod of a cigarette are a mixture of shredded tobacco, expanded tobacco, and reconstituted tobacco sheets; generally, the main raw material is shredded tobacco, and the secondary raw materials are expanded tobacco and reconstituted tobacco sheets.

[0043] In cigarettes, shredded tobacco, expanded tobacco, and reconstituted tobacco sheets preserve the plant tissue and cell wall structure of tobacco leaves and do not contain any additives within the cell wall structure, so the density of the tobacco raw materials, which are mixtures of these materials, is low. Shredded tobacco, expanded tobacco, and reconstituted tobacco sheets have excellent elasticity, so only a small amount is needed to maintain the structure of the tobacco rod. The packing density of the tobacco raw materials in cigarette tobacco rods is generally about 0.2 g / cm. 3 It is.

[0044] For example, the tobacco raw materials in a typical cigarette product are mainly made up of shredded tobacco (72.5% by weight), expanded tobacco (18.1% by weight) as a secondary ingredient, and reconstituted tobacco sheets (9.2% by weight). The tobacco raw materials, which are a mixture of shredded tobacco, expanded tobacco, and reconstituted tobacco sheets contained in the tobacco rod, weigh 0.216 g / cm 3For example, the tobacco raw materials in a representative cigarette product are mainly made up of shredded tobacco (72.8% by weight), secondary raw materials (expanded tobacco) (22.4% by weight), and secondary raw materials (recycled tobacco sheets) (4.8% by weight). The tobacco raw materials, which are a mixture of shredded tobacco, expanded tobacco, and recycle tobacco sheets contained in the tobacco rod, have a packing density of 0.191 g / cm. 3 is the packing density.

[0045] In the heated tobacco product according to the embodiment of the present invention, the portion containing the tobacco raw material may be in the form of a tobacco section, a tobacco rod, or a tobacco capsule. The tobacco raw material may be reconstituted tobacco, a reconstituted tobacco sheet, a reconstituted tobacco slurry sheet, a reconstituted tobacco papermaking sheet, or a reconstituted tobacco granule. The tobacco rod may be a piece of reconstituted tobacco sheet, a reconstituted tobacco slurry sheet, or a reconstituted tobacco papermaking sheet wrapped in cigarette paper.

[0046] Because reconstituted tobacco has inferior elasticity, it is less able to withstand external compressive and shear stresses in cooperation with the wrapping paper, as with paper cigarettes, and is less able to maintain the structure of a heated tobacco product. The disadvantage of reconstituted tobacco in heated tobacco products being less able to maintain their structure is compensated for by the design of the heated tobacco product.

[0047] For example, in the tobacco section structure, two acetate fiber sections (filter section 120) are arranged at an appropriate interval and connected with a wrapping paper, and the reconstituted tobacco is not responsible for maintaining the structure. The preferable interval is within 18 mm.

[0048] For example, in the tobacco rod structure, the density of the tobacco raw material in a conventional cigarette (0.2 g / cm 3 ) over 0.25g / cm 3 or more, preferably 0.26 g / cm 3 or more than 0.27g / cm 3 More preferably, 0.3 g / cm 3As described above, the reconstituted tobacco is packed at a higher packing density than in conventional cigarettes. Also, for example, in a tobacco capsule structure, reconstituted tobacco granules are packed inside a hard plastic capsule that can withstand external forces, and the reconstituted tobacco does not contribute to the resistance.

[0049] In the heated tobacco product according to the embodiment of the present invention, the portion containing the tobacco raw material may be a tobacco rod or a tobacco section. In order to maintain the structure of the tobacco section or the tobacco rod, the tobacco raw material, reconstituted tobacco granules, reconstituted tobacco sheets, reconstituted tobacco slurry sheets, and reconstituted tobacco paper sheets must be packed at a higher density than that of a paper cigarette. However, if the packing density is too high, the air flow circulating through the heated tobacco product will be high, i.e., the airflow resistance will be too high, making inhalation difficult.

[0050] In the heated tobacco product according to the embodiment of the present invention, the tobacco section 140 includes reconstituted tobacco, reconstituted tobacco sheets, and reconstituted tobacco granules. The heated tobacco product may be a rod-shaped article in which one tobacco section 140 and one or two acetate fiber sections (filter sections 120) having air permeability to the tobacco section 140 are continuous in the longitudinal direction. The tobacco section 140 and the acetate fiber section may be connected to each other. The tobacco section 140 and the acetate fiber section may be connected to an intersection that does not contain tobacco or acetate fiber.

[0051] A heated tobacco product can be obtained by first obtaining a first type of continuous rod-shaped article in which a tobacco section 140 and an acetate fiber section (filter section 120) are connected in sequence in the longitudinal direction as a repeating unit, or by obtaining a second type of continuous rod-shaped article in which a tobacco section 140, an intersection section and an acetate fiber section (filter section 120) are connected in sequence in the longitudinal direction as a repeating unit, and then cutting the first or second type of continuous rod-shaped article at approximately the midpoint of the acetate fiber section or along the connecting surface between the acetate fiber section and the tobacco section 140.

[0052] The first type of continuous rod-shaped article can be obtained by the following method 1-1 or 1-2. (Method 1-1) Acetate fiber sections, particularly substantially cylindrical acetate fiber sections previously wrapped in a roll paper, are placed at regular intervals on a roll paper that has been molded into a U-shape and moves in a substantially horizontal direction, and then reconstituted tobacco granules are filled between the acetate fiber sections. After the reconstituted tobacco granules are filled, both ends of the roll paper are overlapped and the edges of the roll paper are bonded with a sealing paste to obtain the first type of continuous rod-shaped article. (Method 1-2) Acetate fiber sections, particularly substantially cylindrical acetate fiber sections previously wrapped in a roll paper, are placed on a roll paper that has been molded into a U-shape and moves in a substantially horizontal direction, and then a reconstituted tobacco sheet section, particularly substantially cylindrical reconstituted tobacco section 140 previously wrapped in a roll paper is placed, and then both ends of the roll paper are overlapped and the edges of the roll paper are bonded with a sealing paste to obtain the first type of continuous rod-shaped article.

[0053] The second type of continuous rod-shaped article is obtained by the following method 2. (Method 2) It is constructed by wrapping tobacco raw material in cigarette paper. The main raw material of the tobacco raw material is reconstituted tobacco. The tobacco rod portion or tobacco capsule portion of a heated tobacco product is constructed of a raw material with a high apparent density. In particular, the amount of reconstituted tobacco sheet contained in the tobacco section 140 containing reconstituted tobacco sheets can be determined in a fixed amount by cutting the reconstituted tobacco sheets to a fixed length, but the amount of reconstituted tobacco contained in the tobacco section 140 containing reconstituted tobacco granules is difficult to determine in a fixed amount.

[0054] Conventional microwave density measurement devices known in the cigarette manufacturing industry are used to measure tobacco raw materials, which are mixtures of low-density shredded tobacco, expanded tobacco, and reconstituted tobacco, and cannot be used to measure the density of the tobacco section 140 of a heated tobacco product, which is filled with reconstituted tobacco, which has a higher density than a cigarette; the reconstituted tobacco contains additives that are not plant tissue derived from tobacco leaves and cause a phase shift in microwaves, so the microwave wavelengths at which density can be measured are different.

[0055] <Example 1> Manufacturing process of heated tobacco products and prototype of heated tobacco product samples The heated tobacco product 100 shown in FIG. 1 is manufactured as follows. A plurality of filter sections 120 are arranged at a predetermined interval inside an exterior paper 160 curved in a U-shape so as to have an opening at the top. The empty portion sandwiched between the filter sections 120 is called a cavity portion. The exterior paper 160 and the plurality of filter sections 120 arranged inside it are transported by a transport device (for example, the transport unit 210 shown in FIG. 2). A vibrating conveyor is installed above the transport device. Reconstituted tobacco granules are supplied to the vibrating conveyor from a buffer tank, and the transport device and the vibrating conveyor are controlled so that the reconstituted tobacco granules fall from a tobacco supply hole provided in the vibrating conveyor at a predetermined timing synchronized with the cavity portion moving on the transport device and at a predetermined rate according to the filling amount into the cavity portion. In this way, the cavity portion between the filter sections 120 is filled with reconstituted tobacco 145 to form a tobacco section 140, and then the upper opening of the exterior paper 160 is sealed to complete the heated tobacco product 100 of FIG. 1.

[0056] The heated tobacco product 100, in which a large number of filter sections 120 and tobacco sections 140 are connected in this manner, is subjected to a filling amount inspection of the reconstituted tobacco, which will be described later, and then cut vertically in the longitudinal direction at the center of each filter section 120 to separate it into individual capsules 102. One capsule 102 is the unit used for one smoking session. When smoking, an aerosol containing tobacco components is generated from the reconstituted tobacco 145 by heating the tobacco section 140 of this capsule 102 with an electric heater or the like.

[0057] 2 is a schematic diagram of a measuring device 200 for measuring the weight of the reconstituted tobacco 145 filled in the tobacco section 140 of the heated tobacco product 100. The measuring device 200 includes a conveying unit 210, a transmitting antenna 220, a receiving antenna 230, a computing unit (e.g., a computer with a processor) 240, and a memory unit (e.g., a computer-readable storage device) 250. For example, the measuring device 200 can be incorporated as a part of a manufacturing apparatus that manufactures the heated tobacco product 100 and the capsule 102 as described above. Such a measuring device 200 is available, for example, as a granule inspection device (model number HMW-GM100) from Hakko Automation Co., Ltd. (located in Fukuoka Prefecture).

[0058] <Example 2> Measurement of microwave phase change of heated tobacco product sample A and acquisition of calibration curve 1 As shown in FIG. 2, the heated tobacco product 100, in which the filter section 120 and the tobacco section 140 are connected, is transported by the transport unit 210. The heated tobacco product 100 on the transport unit 210 is continuously irradiated with microwaves having a frequency of, for example, 8 GHz or more and 24 GHz or less from the transmitting antenna 220, and the microwaves that have passed through the heated tobacco product 100 are received by the receiving antenna 230. The phase of the microwaves changes depending on the dielectric constant of the material through which the microwaves have passed. The phase of the microwaves received by the receiving antenna 230 when the heated tobacco product 100 is not present is set to φ1, and the phase of the microwaves that have passed through the tobacco section 140 of the heated tobacco product 100 and are received by the receiving antenna 230 is set to φ2. The calculation unit 240 calculates the weight of the reconstituted tobacco 145 filled in each tobacco section 140 of the heated tobacco product 100 based on the phase difference Δφ=φ2-φ1 of the received microwaves. A method for determining the weight of reconstituted tobacco from the phase of microwaves will now be described.

[0059] FIG. 3 shows an example of the results of measuring the phase difference Δφ=φ2-φ1 for a heated tobacco product 100 in which various known weights (100 mg to 400 mg) of reconstituted tobacco 145 are filled in the tobacco section 140. Microwaves with a frequency of 8 GHz are used for the measurement. The horizontal axis of FIG. 3 indicates the weight of the reconstituted tobacco 145 contained in the tobacco section 140, and the vertical axis indicates the phase difference Δφ. As shown in this measurement example, it can be seen that there is a linear relationship between the phase difference Δφ and the weight of the reconstituted tobacco 145 (more specifically, when the weight of the reconstituted tobacco 145 increases from 0 mg to 400 mg, the phase difference Δφ decreases linearly from 0.02 (rad) to -0.25 (rad)). Therefore, if the measurement results as shown in FIG. 3 are obtained in advance, the weight of the reconstituted tobacco 145 contained in the tobacco section 140 can be obtained from the value of the phase difference Δφ measured for the heated tobacco product 100 to be measured.

[0060] Specifically, the calculation unit 240 identifies a calibration curve (y=-0.0007x+0.017 in the example of FIG. 3) from the measurement results obtained in advance, such as those in FIG. 3, and stores the coefficients of the obtained calibration curve (-0.0007 and 0.017 in the example of FIG. 3) in the memory unit 250. Next, the calculation unit 240 reads out the coefficients of the calibration curve from the memory unit 250, and calculates the weight of the reconstituted tobacco 145 filled in each tobacco section 140 by applying the value of the phase difference Δφ measured for the heated tobacco product 100, which is the object to be measured, to the calibration curve.

[0061] Depending on the amount of reconstituted tobacco granules filled in the tobacco section 140, the reconstituted tobacco granules may move within the tobacco section 140, causing a bias in the distribution, which may cause the microwave phase φ2 to fluctuate. Figures 4 and 5 are examples of experimental results showing the influence of bias in the reconstituted tobacco granules within the tobacco section 140. In this experiment, the phase φ2 of the microwave transmitted through the tobacco section 140 was measured with the heated tobacco product 100 tilted at a predetermined angle from the horizontal plane H as shown in Figure 6. When the amount of reconstituted tobacco 145 filled is small, with the heated tobacco product 100 tilted from the horizontal plane H, the surface formed by the reconstituted tobacco granules within the tobacco section 140 is inclined with respect to the longitudinal direction of the heated tobacco product 100 as shown in Figure 6, and it is considered that the distribution of the reconstituted tobacco granules within the tobacco section 140 is biased. In Figures 4 and 5, the horizontal axis indicates the tilt angle of the heated tobacco product 100 from the horizontal plane, and the vertical axis indicates the measured microwave phase φ2.

[0062] From the experimental results in FIG. 4, it can be seen that for a heated tobacco product 100 with a diameter of 5.4 mm, when the filling amount of reconstituted tobacco granules is 200 mg or 240 mg, the phase φ2 of the microwave transmitted through the tobacco section 140 does not depend much on the tilt angle of the heated tobacco product 100. Similarly, from the experimental results in FIG. 5, it can be seen that for a heated tobacco product 100 with a tobacco section 140 length of 8 mm, the phase φ2 of the microwave transmitted through the tobacco section 140 does not depend much on the tilt angle of the heated tobacco product 100. This is because in these dimensional configurations, the filling rate of the reconstituted tobacco granules in the tobacco section 140 is high, so that the reconstituted tobacco granules are less likely to be biased within the tobacco section 140. In addition, from the experimental results in FIG. 4, it can also be seen that if the tilt angle of the heated tobacco product 100 is approximately 30° or less, the phase φ2 of the microwave is almost constant regardless of the tilt angle. Therefore, under the assumption that the bias of the reconstituted tobacco granules within the tobacco section 140 is small, the filling weight of the reconstituted tobacco 145 can be calculated with relatively good accuracy from the value of the phase difference Δφ.

[0063] Example 3: Prototype of heated tobacco product sample B With the goal of producing seven types of heated tobacco products (samples B1 to B7) with the amount of reconstituted tobacco granules of 0.0 mg, 50.0 mg, 100.0 mg, 150.0 mg, 200.0 mg, 250.0 mg, and 300.0 mg, samples of heated tobacco products were produced using the following procedure. The packing density of the reconstituted tobacco granules in samples B1 to B7 was 0.0 mg / cm 3 , 87.3 mg / cm 3 , 174.6 mg / cm 3 , 262.0 mg / cm 3 , 349.3 mg / cm 3 , 436.6 mg / cm 3 , 523.9 mg / cm 3 The goal was to:

[0064] The following materials were prepared: exterior paper with a basis weight of 150 g / m2 wound on a bobbin; 2 A 220μm thick, San Dorami S52 / #85 cigarette paper (model number) with a width of 26.5mm and a length of 1000m was prepared (manufactured by Nippon Paper Papylia). As reconstituted tobacco granules, a reconstituted tobacco slurry was prepared by kneading powder of ground burley, flue-cured and oriental dried leaf tobacco, flavoring, additives or moisturizing agents or viscosity modifiers with water and calcium carbonate, which was extruded and then ground to prepare reconstituted tobacco granules with a particle size distribution of 250 to 710 mesh size. As a filter section, a filter section with an outer circumference of 24.5mm, a diameter of 7.8mm and a length of 4mm was prepared by winding acetate fiber with filter forming paper (manufactured by Nippon Filter Kogyo). As glues, vinyl acetate glue and hot melt glue were prepared.

[0065] The heated tobacco product 100 shown in FIG. 1 was manufactured from the above materials as follows.

[0066] The exterior paper 160 is mounted on a manufacturing machine including a conveying device and is continuously unwound from a bobbin, and a glue applicator (not shown) continuously applies vinyl acetate glue to a width of 0.8 mm to 1.0 mm and hot melt glue to a width of 0.5 mm to the upper surface of the exterior paper 160 in a direction substantially parallel to the conveying direction. The exterior paper 160 is conveyed in its longitudinal direction by the conveying device (for example, conveying section 210 shown in FIG. 2).

[0067] After the exterior paper 160 was curved convexly downward, the filter sections 120 were placed near the center in the width direction of the exterior paper 160 at predetermined intervals (12 mm in this case) in the longitudinal direction of the exterior paper 160.

[0068] As the exterior paper 160 and filter section 120 continue to be moved longitudinally by the conveying section 210, the edge of the exterior paper 160 is bent so that it faces upwards, and the filter section 120 arranged together with the exterior paper 160 is now in a form in which the filter section 120 defines a U-shaped groove in the exterior paper 160 that is open at the top (this section becomes a cavity portion at the end of the process, and so for convenience it is referred to as the cavity portion).

[0069] A belt conveyor was installed above the transport section 210. Reconstituted tobacco granules were supplied to the belt conveyor from a buffer tank, and the transport device and belt conveyor were controlled so that the reconstituted tobacco granules would fall from a tobacco supply hole provided in the vibrating conveyor at a predetermined timing synchronized with the cavity section moving on the transport device and at a predetermined rate corresponding to the filling amount into the cavity section. In this way, the reconstituted tobacco granules were filled from above through the tobacco supply hole into the cavity section above the transport section 210, and tobacco section 140 was formed.

[0070] A glue applicator (not shown) continuously applied vinyl acetate glue to a width of 0.8 mm to 1.0 mm and hot melt glue to a width of 0.5 mm in a direction substantially parallel to the conveying direction to the vicinity of one edge of the exterior paper 160 bent upward. The edge of one side of the exterior paper 160 to which the glue was applied was overlapped with the vicinity of the other edge of the exterior paper 160, and the exterior paper 160 was pasted together in a width of about 2.0 mm near the two edges.

[0071] Through the above steps, a continuous rod-shaped intermediate for the heated tobacco product was obtained, which was then cut to a fixed length so as to include six tobacco sections 140, to obtain the heated tobacco product 100 having a length of 120 mm, a diameter of 7.8 mm, and a circumference of 24.5 mm.

[0072] The amount of phase change of the microwaves was measured for the intermediate heated tobacco product on the conveying section 210 by the measuring device 200. The phase of the microwaves irradiated to the measurement object and the received microwaves changes depending on the dielectric constant of each tobacco section 140 of the heated tobacco product 100 through which the microwaves have passed, and the amount of phase change was measured. The measurement results obtained over time were stored in the memory section 250 as phase change amount data via the calculation section 240. When the heated tobacco product 100 passed between the two antennas, the transmitting antenna 220 and the receiving antenna 230, which were provided opposite the measuring device 200, the heated tobacco product 100 was irradiated with microwaves of a frequency of 8 GHz from the transmitting antenna 220, and the microwaves that had passed through the tobacco sections 140 of the heated tobacco product 100 were received by the receiving antenna 230. When microwaves with a phase φ0 were irradiated to the heated tobacco product 100, the phase of the microwaves that transmitted through the filter section 120 changed to φ1, and the phase of the microwaves that transmitted through the tobacco section 140 changed to φ2. The change from φ1 to φ2 was a periodic change due to the structure of the heated tobacco product 100 in which the tobacco sections 140 and the filter sections 120 are alternately aligned.

[0073] The path length from the receiving and transmitting antennas of the measuring device 200 to the cutting section is registered in the memory unit 250. The path length is an integer multiple of the total length of the tobacco section 140, in this case three times. The total length of the heated tobacco product 100, the length of the tobacco section 140, the length of the filter section 120, and the ratio of each section to the total length of the heated tobacco product 100 are registered in advance in the memory unit 250.

[0074] The periodic and continuous raw data acquired by the measuring device 200 was processed by the calculation unit 240, and a peak in the amount of phase change was detected within a range of ±5% of 12 mm, which is the length of the tobacco section 140, based on the center position of each tobacco section 140 of the heated tobacco product 100, that is, within a range of approximately 6.0 mm ±0.6 mm from the position where the filter section 120 and the tobacco section 140 abut, and the peak phase change value was extracted and used as the amount of phase change of the tobacco section. Furthermore, the number of peaks in the amount of phase change was captured and counted. The results of these processes by the calculation unit 240 were stored in the memory unit 250. This made it possible to match each tobacco section 140 with its amount of phase change.

[0075] Each time a sufficient number of samples of the heated tobacco product 100 (at least 100 or more) for the following Example 4 were manufactured, the supply amount (supply rate) per minute of the reconstituted tobacco granules dropping from the vibrating conveyor was adjusted by adjusting the vibration frequency of the vibrating conveyor to a supply rate predicted to meet the target granule filling amount based on the recorded phase change data and the above-mentioned calibration curve. In this way, samples B-1, 2, 3, 4, 5, 6, and 7 of the heated tobacco product 100 having the target granule filling amount were manufactured in order. Other process conditions were not changed. Sample B-7, which has a target filling amount of reconstituted tobacco granules of 300.0 mg, was not properly filled because the cavity part passed directly under the tobacco supply hole before all the reconstituted tobacco granules were filled. Therefore, sample B-7 was excluded from the following Example 4. Table 1 shows the target granule weights of samples B-1 to 6 and the average phase change amount measured for 100 heated tobacco products 100 manufactured continuously for each sample.

[0076] [Table 1]

[0077] Example 4: Weight measurement of reconstituted tobacco granules of heated tobacco product samples B1 to B6 From at least 100 samples B-1 to 6 obtained in Example 3 above, 10 samples were randomly selected from each sample, and the weight of each sample was measured using a top-loading balance (ME4001T / 00 manufactured by Mettler Toledo). The weight of the outer packaging paper, filter section, and glue, which are materials other than the reconstituted tobacco granules, was subtracted from the weight of the sample, and the actual weight of the reconstituted tobacco granules filled in each sample was calculated. The calculated weight of the reconstituted tobacco granules was divided by the number of cavities (6) to calculate the weight of the reconstituted tobacco granules contained in one cavity. The target granule weights of samples B-1 to 6, and the average weight and granule density of the reconstituted tobacco granules contained in one cavity are shown in Table 2.

[0078] [Table 2]

[0079] As is clear from Table 2, the heated tobacco product 100 manufactured with the target granule weight using the phase change amount of the tobacco section 140 obtained by irradiating with 8 GHz microwaves as an index had a difference between the target granule weight and the actually measured granule weight within 5%. In addition, it was possible to pack the tobacco raw material at a granule density, i.e., a density higher than that of conventional cigarettes.

[0080] <Example 5> Data analysis In order to verify the linearity of the phase change and the weight of the reconstituted tobacco granules for Samples B-1 to B-6 obtained in Examples 3 and 4 above, the correlation coefficient was calculated by linearly approximating the reconstituted tobacco weight and the phase change (Δ [rad]). y=-0.0007x+0.0033, R 2 =0.9954

[0081] A graph plotting the filling amount of the reconstituted tobacco granules of samples B-1 to 6 obtained in Example 4 on the X-axis and the phase change amount of samples B-1 to 6 obtained in Example 3 on the Y-axis is shown in FIG. 7. As is clear from the linear approximation formula and correlation coefficient in FIG. 7, the samples of the heated tobacco product 100 manufactured with each target granule weight using the phase change amount obtained by irradiating 8 GHz microwaves as an index showed that the phase change amount of the tobacco section 140 was in the range of 0.00 to -10.00 (deg), and the phase change amount and the granule weight were in a linear relationship. Therefore, it was confirmed that if the measurement results as shown in FIG. 3 are obtained in advance, the weight of the reconstituted tobacco 145 contained in the tobacco section 140 can be calculated from the value of the phase difference Δφ measured for the heated tobacco product 100 to be measured.

[0082] The inventors, who are familiar with the cigarette manufacturing process, knew that in mass-produced cigarettes, for example in production lots of 1,000 to 10,000 cigarettes, the filling amount of tobacco material for the entire lot will be within standard, but individual cigarette products may occasionally deviate from standard, and that quality control is carried out in a quality control step later in the manufacturing process by randomly selecting and eliminating lots that do not meet the standards.

[0083] The inventors recognized that in a heated tobacco product filled with reconstituted tobacco, the amount of tobacco raw material (reconstituted tobacco, reconstituted tobacco granules, reconstituted tobacco sheet) is likely to be linked to the level of sensory and smoking experience that a consumer can obtain by enjoying one heated tobacco product, and the number of times that a consumer can enjoy one heated tobacco product, and that it is a problem to control the amount of tobacco raw material for each product and ensure that it is within the standard. However, the measurement method for tobacco materials known in the manufacturing process of cigarettes cannot be applied to the manufacturing process of heated tobacco products, and there was no density measurement method that could accommodate the very high manufacturing speed (1500 cigarettes / min or more) of heated tobacco products, so it was not possible to ensure that the amount of tobacco raw material in heated tobacco products was within the standard.

[0084] Therefore, the inventors hypothesized that the distribution of the filling amount per stick of tobacco raw materials (reconstituted tobacco, reconstituted tobacco granules, reconstituted tobacco sheets) filled into heated tobacco products may follow a normal distribution, and conceived that if it is confirmed that the phase change amount per stick obtained by irradiating 8 GHz microwaves in Samples B-1 to 6 obtained in Example 3 follows a normal distribution, then it would be possible to perform quality control to ensure that the filling amount of reconstituted tobacco granules in manufactured heated tobacco products is within the specification for all products by comparing the phase change amount obtained for each stick simultaneously during the manufacture of heated tobacco products with a finite average value and standard deviation.

[0085] Therefore, normal probability plots were drawn for samples B-1 to B-6 with the phase change amount on the horizontal axis and the expected value on the vertical axis, and it was verified that the phase change amount of 100 heated tobacco product samples manufactured continuously for each sample followed a normal distribution. The results are shown in Figures 8A to 8F. In the normal probability plots drawn, the measured and expected values ​​of the phase change amount of samples B-1 to B-6 were aligned on a straight line. In addition, when the basic statistics of samples B-1 to B-6 were calculated, the results were as shown in Table 3 below, and it was confirmed that the average value, median value, and mode value were almost the same. It was confirmed that the phase change amount of each heated tobacco product obtained by irradiating with 8 GHz microwaves followed a normal distribution.

[0086] [Table 3]

[0087] Therefore, the quality of heated tobacco products can be controlled by measuring the amount of phase change of microwaves with a frequency of 8 GHz that have passed through the tobacco section, and using the average value μ and standard deviation σ of the measured data obtained over time as indicators. Based on the measured data of the amount of phase change of microwaves with a frequency of 8 GHz that have passed through the tobacco section, the filling amount of reconstituted tobacco granules can be controlled with the phase change amounts of μ±3σ, μ±2σ, and μ±σ as control levels.

[0088] For example, if the control levels are μ±3σ, μ±2σ, and μ±σ, then one B-1 sample with a minimum value of -6.08 and one B-1 sample with a maximum value of -5.67 in the Basic Statistics Table (Table 3) are outside the control levels and therefore are rejected from the manufacturing process, one B-2 sample with a minimum value of -7.15 and one B-2 sample with a maximum value of -7.58 in the Basic Statistics Table are outside the control levels and therefore are rejected from the manufacturing process, and one B-3 sample with a minimum value of -9.51 and one B-3 sample with a maximum value of -9.99 in the Basic Statistics Table are outside the control levels and therefore are rejected from the manufacturing process. One B-4 sample with a minimum value of -11.59 and one B-4 sample with a maximum value of -12.28 in the Basic Statistics Table are rejected from the production process because they deviate from the control level, one B-5 sample with a minimum value of -13.68 and one B-5 sample with a maximum value of -14.31 in the Basic Statistics Table are rejected from the production process because they deviate from the control level, and one B-6 sample with a minimum value of -15.45 and one B-6 sample with a maximum value of -16.09 in the Basic Statistics Table are rejected from the production process because they deviate from the control level.

[0089] Therefore, based on the data actually measured for samples B-1 to B-6, heated tobacco products that are not rejected by quality control are specifically heated tobacco products whose phase change amount is within the range of -5.88 ± 0.18 [deg], heated tobacco products whose phase change amount is within the range of -7.32 ± 0.27 [deg], heated tobacco products whose phase change amount is within the range of -9.73 ± 0.27 [deg], heated tobacco products whose phase change amount is within the range of -12.03 ± 0.33 [deg], heated tobacco products whose phase change amount is within the range of -13.97 ± 0.39 [deg], and heated tobacco products whose phase change amount is within the range of -15.84 ± 0.36 [deg], and such heated tobacco products are quality controlled with the filling amount of reconstituted tobacco granules within μ ± 3σ.

[0090] Therefore, based on the data actually measured for samples B-1 to B-6, heated tobacco products that are not excluded by quality control are specifically heated tobacco products whose phase change amount is within the range of -5.88±0.12 [deg], heated tobacco products whose phase change amount is within the range of -7.32±0.18 [deg], heated tobacco products whose phase change amount is within the range of -9.73±0.18 [deg], heated tobacco products whose phase change amount is within the range of -12.03±0.22 [deg], heated tobacco products whose phase change amount is within the range of -13.97±0.26 [deg], and heated tobacco products whose phase change amount is within the range of -15.84±0.24 [deg], and such heated tobacco products are quality controlled with the filling amount of reconstituted tobacco granules within μ±2σ.

[0091] Therefore, based on the data actually measured for samples B-1 to B-6, heated tobacco products that are not rejected by quality control are specifically heated tobacco products whose phase change amount is within the range of -5.88 ± 0.06 [deg], heated tobacco products whose phase change amount is within the range of -7.32 ± 0.09 [deg], heated tobacco products whose phase change amount is within the range of -9.73 ± 0.09 [deg], heated tobacco products whose phase change amount is within the range of -12.03 ± 0.11 [deg], heated tobacco products whose phase change amount is within the range of -13.97 ± 0.13 [deg], and heated tobacco products whose phase change amount is within the range of -15.84 ± 0.12 [deg], and these heated tobacco products are quality controlled for the filling amount of reconstituted tobacco granules at μ ± σ.

[0092] Heat-not-burn tobacco products with a phase change amount within the above range obtained by irradiating 8 GHz microwaves are excellent heat-not-burn tobacco products with quality control of the granule filling amount. Heat-not-burn tobacco products that have undergone such quality control can only be sent to the next packaging process. Similarly, only those can be stored in warehouses. Similarly, only those can be shipped. Similarly, only those can be distributed. Similarly, only those can be used by consumers.

[0093] A heated tobacco product that exhibits a phase shift of -0.25 (rad) to 0.02 (rad) when irradiated with 8 GHz microwaves is a high-quality heated tobacco product whose quality control ensures that it meets the sensory expectations of consumers.

[0094] Based on Examples 3 and 4, a heated tobacco product containing a tobacco section that exhibits a phase change of -15.84 (deg) or more and -5.88 (deg) or less when irradiated with 8 GHz microwaves is a heated tobacco product of excellent quality that guarantees the sensory experience expected by consumers.

[0095] Based on Examples 3 and 4, a heated tobacco product containing a tobacco section that exhibits a phase change of greater than -15.84 (deg) and less than -5.88 (deg) when irradiated with 8 GHz microwaves is a heated tobacco product of excellent quality that guarantees the sensory experience expected by consumers.

[0096] Based on Example 5, a heated tobacco product including a tobacco section that exhibits a phase change within the range of -15.84±0.36 (deg), -15.84±0.24 (deg), or -15.84±0.12 (deg) when irradiated with 8 GHz microwaves is a heated tobacco product of excellent quality with guaranteed sensory experience expected by consumers.

[0097] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0098] 100 Heat-not-burn tobacco products 102 Capsules 120 Filter Section 140 Tobacco Section 145 Reconstituted Tobacco 160 Outer packaging 200 Measuring Equipment 210 Conveyor 220 Transmitting Antenna 230 Receiving Antenna 240 Calculation Department 250 Memory

Claims

1. A cylindrical heated tobacco product consisting of multiple sections having a diameter of 5.4 mm to 7.8 mm, at least one filter section; At least one tobacco section, each of said tobacco sections having a thickness of 0.25 g / cm ３ at least one tobacco section packed with reconstituted tobacco at a packing density equal to or greater than 100%, said tobacco section being free of shred tobacco, expanded tobacco and reconstituted tobacco; and when irradiated with microwaves having a frequency of 8 GHz, the microwaves transmitted through the tobacco section exhibit a phase change of -0.25 (rad) to 0.02 (rad).

2. A cylindrical heated tobacco product consisting of multiple sections having a diameter of 5.4 mm to 7.8 mm, at least one filter section; At least one tobacco section, each of said tobacco sections having a thickness of 0.25 g / cm ３ at least one tobacco section packed with reconstituted tobacco at a packing density equal to or greater than 100%, said tobacco section being free of shred tobacco, expanded tobacco and reconstituted tobacco; wherein the tobacco section imparts a phase change of -15.84 (deg) or more and -5.88 (deg) or less to the microwave when irradiated with a microwave having a frequency of 8 GHz.

3. A cylindrical heated tobacco product consisting of multiple sections having a diameter of 5.4 mm to 7.8 mm, at least one filter section; At least one tobacco section, each of said tobacco sections having a thickness of 0.25 g / cm ３ at least one tobacco section packed with reconstituted tobacco at a packing density equal to or greater than 100%, said tobacco section being free of shred tobacco, expanded tobacco and reconstituted tobacco; wherein the tobacco section imparts a phase change to the microwave of -15.84 (deg) or more and less than -5.88 (deg) when irradiated with a microwave having a frequency of 8 GHz.

4. A cylindrical heated tobacco product consisting of multiple sections having a diameter of 5.4 mm to 7.8 mm, at least one filter section; At least one tobacco section, each of said tobacco sections having a thickness of 0.25 g / cm ３ at least one tobacco section packed with reconstituted tobacco at a packing density equal to or greater than 100%, said tobacco section being free of shred tobacco, expanded tobacco and reconstituted tobacco; wherein the tobacco section imparts a phase change of -15.84 (deg) or more and -7.32 (deg) or less to the microwave when irradiated with a microwave having a frequency of 8 GHz.

5. The cylindrical heated tobacco product according to claim 1 , wherein the filter section and the tobacco section are arranged alternately in the longitudinal direction.

6. 6. The cylindrical heated tobacco product of claim 1, wherein the tobacco section comprises reconstituted tobacco granules.

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