Non-combustion heating stick

Abstract

This non-combustion-heated stick 1 comprises: a tobacco section 10 that has an aerosol source 11 containing tobacco; a cooling section 20 that cools vapor, generated by heating the tobacco section 10 by means of a heat generating element, to produce an aerosol; and a filter section 30 through which the aerosol passes. The tobacco section 10 has a higher filling density of tobacco in a part closer to the heat generating element than in a part further away therefrom.

Description

[Technical Field]

[0001] The present invention relates to a non-combustion heating stick. [Background technology]

[0002] Conventionally, non-combustion heating type inhalation devices have been known that heat a tobacco portion filled with shredded tobacco leaves using a heater or the like. For example, the device described in Patent Document 1 has a heater disposed around the periphery of the tobacco portion to heat it from the outside. The device described in Patent Document 2 has a heater inserted into the tobacco portion to heat it from the inside. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020-100927 [Patent Document 2] Japanese Patent Application Publication No. 2018-33466 Summary of the Invention [Problem to be solved by the invention]

[0004] In any heating method, it is preferable to use the limited energy supplied to generate heat from a heating element such as a heater to increase the amount of filler such as nicotine or glycerin delivered into the oral cavity. An object of the present invention is to provide a non-combustion heating stick that can efficiently use the energy supplied to the heating element to increase the amount of filling delivered to the oral cavity. [Means for solving the problem]

[0005] The first feature of the present invention, which was completed with this objective in mind, is a non-combustion heating stick comprising a tobacco section having an aerosol source containing tobacco, a cooling section that cools the vapor generated when the tobacco section is heated by a heating element to generate an aerosol, and a filter section through which the aerosol passes, wherein the tobacco section has a higher packing density of the tobacco in a section closer to the heating element than in a section further away. A second feature is that the tobacco part may be heated from the outside by the heating element arranged outside the tobacco part, and the packing density at the outside may be higher than the packing density at the inside. A third feature is that the tobacco portion may have a filling portion filled with tobacco, and a tobacco sheet formed using pulverized tobacco leaves and wrapped around the filling portion. A fourth feature is that the tobacco sheet may be at least one of a cast sheet, a laminate sheet, and a paper-made sheet. A fifth feature is that the tobacco sheet may be formed by laminating at least one of a cast sheet, a laminate sheet, and a paper-formed sheet. A sixth feature is that the tobacco part may be heated from the inside by the heating element disposed inside the tobacco part, and the packing density inside may be higher than the packing density outside. A seventh feature is that the tobacco part further has a susceptor that generates heat by electromagnetic induction as the heating element, and the packing density around the susceptor of the tobacco part may be higher than the packing density in the outer periphery. The eighth feature is a non-combustion heating stick comprising: a tobacco section having an aerosol source containing tobacco; a cooling section that generates an aerosol by cooling vapor generated by heating the tobacco section with a heating element; and a filter section through which the aerosol passes; wherein the tobacco section has a tobacco sheet formed using pulverized tobacco leaves that is positioned near the heating element, and a filling section filled with tobacco that is positioned farther from the heating element than the tobacco sheet. A ninth feature is that the tobacco portion may be heated from the outside by the heating element arranged outside the tobacco portion, and the tobacco sheet may be wrapped around the outer periphery of the filling portion. [Effects of the Invention]

[0006] According to the first feature, the energy supplied to the heating element can be efficiently used to increase the amount of filling material delivered into the oral cavity. According to the second feature, in an external heating type suction device, the energy supplied to the heating element can be efficiently used to increase the amount of filling delivered. According to the third feature, it is possible to easily and efficiently increase the amount of filler delivered. According to the fourth feature, the tobacco sheet can be made into a sheet with a high tobacco packing density with high reliability. According to the fifth feature, the tobacco sheet can be used to enlarge the area with high packing density. According to the sixth feature, in an internal heating type suction device, the energy supplied to the heating element can be efficiently used to increase the amount of filling delivered. According to the seventh feature, in a suction device that generates heat by electromagnetic induction, the energy supplied to the heating element can be efficiently used to increase the amount of filling delivered. According to the eighth feature, the energy supplied to the heating element can be efficiently used to increase the amount of filling material delivered into the oral cavity. According to the ninth feature, in an external heating type suction device, the energy supplied to the heating element can be efficiently used to increase the amount of filling delivered. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a diagram showing an example of a vertical cross section of the stick according to the first embodiment. [Figure 2] 1 is a diagram showing an example of a schematic configuration of a suction device in which a stick according to a first embodiment is used. FIG. [Figure 3](a) is a comparison of the amount of nicotine delivered when the aerosol source of the tobacco part is varied in composition. (b) is a comparison of the amount of glycerin delivered when the aerosol source of the tobacco part is varied in composition. [Figure 4] FIG. 1 shows a comparison of aerosol source configurations. [Figure 5] FIG. 10 is a diagram showing an example of a vertical cross section of a tobacco part according to a modified example. [Figure 6] FIG. 10 is a diagram showing an example of a vertical cross section of a stick according to a second embodiment. [Figure 7] FIG. 10 is a diagram illustrating an example of a schematic configuration of a suction device in which a stick according to a second embodiment is used. [Figure 8] FIG. 10 is a diagram showing an example of a vertical cross section of a stick according to a third embodiment. [Figure 9] FIG. 10 is a diagram illustrating an example of a schematic configuration of a suction device in which a stick according to a third embodiment is used. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals are used to denote the same parts.

[0009] First Embodiment FIG. 1 is a diagram showing an example of a vertical cross section of a stick 1 according to the first embodiment. FIG. 2 is a diagram showing a schematic example of the overall configuration of a suction device 100 in which the stick 1 according to the first embodiment is used. A non-combustion heating stick (hereinafter, sometimes referred to as a "stick") 1 according to the first embodiment comprises a tobacco section 10, a cooling section 20, and a filter section 30. The tobacco section 10 is formed in a cylindrical shape. Hereinafter, the direction of the center line CL of the tobacco section 10 may be referred to as the "center line direction." The stick 1 further comprises tipping paper 40, which integrates the tobacco section 10, the cooling section 20, and the filter section 30 by winding them in this order in the center line direction. Hereinafter, one end side in the center line direction (the left side in FIG. 1 ) may be referred to as the first side, and the other end side in the center line direction (the right side in FIG. 1 ) may be referred to as the second side. The first side is the end side that is inserted into the inhalation device 100. The second side is the opposite side to the first side, and is the end side that the user holds in their mouth for inhalation. Furthermore, a cross section along the center line direction is referred to as a "longitudinal cross section," and a cross section cut at a plane perpendicular to the center line direction is defined as a "transverse cross section."

[0010] [How to use Stick 1] The stick 1 according to the first embodiment is used in a non-combustion heating suction device 100. As shown in FIG. 2, the suction device 100 includes a power supply unit 111 that stores power and supplies power to each component of the suction device 100, a sensor unit 112 that detects various information related to the suction device 100, and a notification unit 113 that notifies the user of the information. The suction device 100 also includes a memory unit 114 that stores various information for the operation of the suction device 100, a communication unit 115 that transmits and receives information between the suction device 100 and other devices, and a control unit 116 that controls the overall operation of the suction device 100. The suction device 100 also includes a heating unit 121 that heats the stick 1, a holding unit 140 that holds the stick 1, an opening 142 that connects the internal space 141 to the outside, and a heat insulating unit 144 that prevents heat transfer from the heating unit 121 to other components of the suction device 100. In the suction device 100, the user inhales the stick 1 while it is held in the holding unit 140.

[0011] The heating unit 121 heats the tobacco portion 10 of the stick 1. The heating unit 121 is made of any material, such as metal or polyimide. For example, the heating unit 121 is made in the form of a film, and is arranged so as to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the aerosol source 11 contained in the stick 1 is heated from the outer periphery of the stick 1. The heating unit 121 generates heat when power is supplied from the power supply unit 111. As an example, power may be supplied when the sensor unit 112 detects that a predetermined user input has been made. The heating unit 121 then: Stick 1 From an unheated state, the target temperature is set to 280 degrees and heated for 15 seconds. death For example, after 15 seconds have elapsed, the target temperature is set to a constant 260 degrees.

[0012] When the temperature of the stick 1 heated by the heating unit 121 reaches a predetermined temperature, the user can inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, power supply may be stopped. As another example, power may be supplied and aerosol may be generated during the period in which the sensor unit 112 detects that the user has inhaled.

[0013] The heat insulating section 144 is disposed so as to cover at least the outer periphery of the heating section 121. For example, the heat insulating section 144 is made of a vacuum heat insulating material, an aerogel heat insulating material, or the like. Note that the vacuum heat insulating material is a heat insulating material in which, for example, glass wool, silica (silicon powder), or the like is wrapped in a resin film and placed in a high vacuum state, thereby reducing the heat conduction of gas to as close to zero as possible.

[0014] [Tobacco section 10] The tobacco section 10 has an aerosol source 11 that generates vapor that generates an aerosol when heated, and cigarette paper 12 that covers the outer periphery of the aerosol source 11. The tobacco section 10 is formed into a cylindrical shape by wrapping the aerosol source 11 in the cigarette paper 12. At least a portion of the tobacco section 10 is accommodated in the internal space 141 of the holding section 140 when the stick 1 is held in the holding section 140. The specific configuration of the tobacco section 10 will be described in detail later, but its shape is as follows.

[0015] The tobacco portion 10 preferably has a cylindrical shape that satisfies the aspect ratio defined by the following formula (1) of 1 or more. Aspect ratio = h / w (1) where w is the width of the cross section of the tobacco section 10, h is the size of the tobacco section 10 in the center line direction, and it is preferable that h≧w. The shape of the cross section is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc., and the width w is the diameter when the cross section is circular, the major axis when it is elliptical, or the diameter of the circumscribing circle or the major axis of the circumscribing ellipse when it is polygonal or rounded polygonal.

[0016] The size h of the tobacco portion 10 in the center line direction can be changed appropriately depending on the size of the product, but is usually 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and even more preferably 18 mm or more. The size h of the tobacco portion 10 in the center line direction is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less.

[0017] Furthermore, the ratio of the size h of the tobacco portion 10 in the center line direction to the size of the stick 1 in the center line direction is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. Furthermore, the ratio of the size h of the tobacco portion 10 in the center line direction to the size of the stick 1 in the center line direction is usually 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

[0018] The content of the aerosol source 11 in the tobacco portion 10 is not particularly limited, but may be 200 mg or more and 800 mg or less, and preferably 250 mg or more and 600 mg or less. This range is particularly suitable for a tobacco portion 10 having a circumference of 22 mm and a size of 20 mm in the center line direction.

[0019] [Cooling section 20] The cooling section 20 is disposed adjacent to the tobacco section 10 and the filter section 30, and is a member formed so that the cross section of a cylinder or the like is hollow (hollow) by wrapping the forming paper 21 around it.

[0020] The size of the cooling section 20 in the centerline direction can be changed as appropriate depending on the size of the product, but is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. The size of the cooling section 20 in the centerline direction is usually 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. By setting the size of the cooling section 20 in the centerline direction to be equal to or greater than the above-mentioned lower limit, a sufficient cooling effect can be ensured to obtain a good flavor, while by setting it to be equal to or less than the above-mentioned upper limit, loss due to adhesion of the generated steam and aerosol to the forming paper 21 can be suppressed.

[0021] It is desirable for the cooling section 20 to have a large interior surface area. The forming paper 21 that forms the cooling section 20 may be formed by a thin sheet of material that is wrinkled to form channels, and then pleated, gathered, and folded. The more folds or pleats within a given volume of the element, the greater the total surface area of ​​the cooling section 20. The thickness of the forming paper 21 is not particularly limited and may be, for example, 5 μm to 500 μm, or 10 μm to 250 μm. The material of the forming paper 21 is not particularly limited and may be, for example, a paper mainly composed of pulp, or a paper mainly composed of any of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil, or any combination thereof.

[0022] Cooling part 20 is provided with openings V (also referred to as "ventilation filters (Vf)" in the present technical field) in the circumferential direction and concentrically. Openings V are present in an area through which air can flow in from outside stick 1, in other words, in an area that protrudes from opening 142 when stick 1 is held in holding part 140 of inhalation device 100.

[0023] The presence of the openings V allows air to flow from the outside into the cooling part 20 during puffing, lowering the temperature of the steam and air flowing in from the tobacco part 10. Opening V By positioning the filter within an area of ​​4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, not only can the cooling capacity be improved, but the accumulation of the substance (product) generated by heating within the cooling section 20 can be suppressed, thereby improving the amount of product delivered. Furthermore, when the tobacco portion 10 is heated, the vapor generated using the aerosol as a condensation nucleus is liquefied by contact with the air from outside and a drop in temperature, thereby accelerating the generation of the aerosol.

[0024] When the concentrically arranged holes V in the cooling section 20 are treated as one hole group, there may be one hole group or two or more hole groups. When there are two or more hole groups, it is preferable that no hole group be provided in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, from the viewpoint of improving the delivery amount of the component generated by heating. Furthermore, when the stick 1 is configured such that the tobacco section 10, the cooling section 20, and the filter section 30 are wrapped in tipping paper 40, the tipping paper 40 preferably has an opening formed immediately above the opening V formed in the cooling section 20. When producing such a stick 1, it is possible to prepare and wrap tipping paper 40 with an opening that overlaps with the opening V, but from the viewpoint of ease of production, it is preferable to produce a stick 1 without an opening V and then drill a hole that passes through both the cooling section 20 and the tipping paper 40 at the same time.

[0025] From the viewpoint of improving the delivery of the product by heating, the region where the openings V exist is not particularly limited as long as it is a region of 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, but from the viewpoint of further improving the delivery of the product, it is preferably a region of 4.5 mm or more, more preferably a region of 5 mm or more, and even more preferably a region of 5.5 mm or more. Moreover, from the viewpoint of ensuring the cooling function, the region where the openings V exist is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less.

[0026] From the viewpoint of improving the delivery of the product by heating, the region where the perforations V exist is preferably a region of 24 mm or more, preferably a region of 24.5 mm or more, preferably a region of 25 mm or more, and more preferably a region of 25.5 mm or more from the end face on the first side of the stick 1 toward the cooling section 20. Furthermore, from the viewpoint of ensuring the cooling function, the region where the perforations V exist is preferably a region of 35 mm or less, more preferably a region of 30 mm or less, and even more preferably a region of 27 mm or less.

[0027] Furthermore, when the boundary between the cooling section 20 and the tobacco section 10 is considered as the reference, if the size of the cooling section 20 in the centerline direction is 20 mm or more, from the viewpoint of ensuring cooling function, the region where the apertures V exist is preferably a region of 5 mm or more from the boundary between the cooling section 20 and the tobacco section 10 toward the cooling section 20, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more. From the viewpoint of improving the delivery of the product by heating, the region where the apertures V exist is preferably a region of 16 mm or less, more preferably a region of 15.5 mm or less, even more preferably a region of 15 mm or less, and particularly preferably a region of 14.5 mm or less.

[0028] The openings V are provided so that the air inflow rate through the openings V is 10% by volume or more and 90% by volume or less when an automatic smoking machine inhales at 17.5 ml / second. This "air inflow rate" is the volumetric rate of air inflowing through the openings V when the rate of air inhaled from the mouth end is taken as 100% by volume. The air inflow rate is preferably 50% by volume or more and 80% by volume or less, and more preferably 55% by volume or more and 75% by volume or less. These air inflow rates can be achieved, for example, by selecting the number of openings V per opening group from the range of 5 to 50, selecting the diameter of the openings V from the range of 0.1 mm to 0.5 mm, and combining these selections. The air inflow ratio can be measured using an automatic smoking machine (for example, a single-cigarette automatic smoking machine manufactured by Borgwaldt) by a method conforming to ISO9512.

[0029] [Filter section 30] The filter unit 30 has a first filter 31 connected to the second side of the cooling unit 20, a second filter 32 located on the second side of the first filter 31, and wrapping paper 33 wound around the first filter 31 and the second filter 32. The filter unit 30 is connected to the second side of the cooling unit 20.

[0030] The first filter 31 is cylindrical, and the second filter 32 is columnar. The diameter of the outer circumferential surface of the first filter 31 and the second filter 32 can be changed appropriately according to the size of the product, but is usually 4.0 mm to 9.0 mm, preferably 4.5 mm to 8.5 mm, and more preferably 5.0 mm to 8.0 mm. The cross-sectional shape of the first filter 31 and the second filter 32 does not have to be circular, and may be polygonal, elliptical, or the like.

[0031] The outer circumferential length of the cross section of the first filter 31 and the second filter 32 can be changed as appropriate to suit the size of the product, but is usually 14.0 mm or more and 27.0 mm or less, preferably 15.0 mm or more and 26.0 mm or less, and more preferably 16.0 mm or more and 25.0 mm or less. The size of the filter part 30 in the center line direction can be changed as appropriate according to the size of the product, but is usually 5 mm or more and 35 mm or less, preferably 10 mm or more and 30 mm or less, and more preferably 15 mm or more and 25 mm or less.

[0032] The airflow resistance per 120 mm of size in the center line direction of the filter section 30 is not particularly limited, but is usually 40 mmH2O or more and 300 mmH2O or less, preferably 70 mmH2O or more and 280 mmH2O or less, and more preferably 90 mmH2O or more and 260 mmH2O or less. The airflow resistance is measured in accordance with the ISO standard method (ISO6565) using, for example, a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of the filter unit 30 refers to the difference in air pressure between the first side and the second side when air is flowed from the first side to the second side at a predetermined air flow rate (17.5 cc / min) without air permeation through the sides of the filter unit 30. The unit is generally expressed in mmH2O.

[0033] The first filter 31 and the second filter 32 are not particularly limited as long as they contain a filter material and have the general functions of a filter. Examples of general filter functions include adjusting the amount of air mixed in when inhaling aerosols, reducing flavors, and reducing nicotine and tar, but they do not need to have all of these functions. Furthermore, in non-combustion heat-type sticks 1, which tend to produce fewer components and have a lower filling rate of the aerosol source 11 compared to cigarette products, one important function is to prevent the aerosol source 11 from falling off while suppressing the filtering function.

[0034] The filter material constituting the first filter 31 and the second filter 32 is, for example, a cylindrically shaped filler such as cellulose acetate fiber, nonwoven fabric, or pulp paper. Alternatively, a paper filter filled with sheet-like pulp paper may be used. The density of the filter material is not particularly limited, but is usually 0.10 g / cm 3 More than 0.25g / cm 3 less than 0.11 g / cm 3 More than 0.24g / cm 3 Preferably, it is 0.12 g / cm or less. 3 More than 0.23g / cm 3 More preferably, it is:

[0035] [Tip Paper 40] The tipping paper 40 connects (couples) the second end of the cooling part 20 and the first end of the filter part 30 by integrally winding them up. The material of the tipping paper 40 can be, for example, one whose main component is pulp. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in any combination of two or more types in any ratio.

[0036] Usable pulp types include chemical pulp produced by kraft cooking, acidic, neutral or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. The tipping paper 40 may be made up of one sheet, or may be made up of multiple sheets or more. The shape of the tipping paper 40 is not particularly limited, and can be, for example, square or rectangular.

[0037] The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm or more and 60 gsm or less, preferably 33 gsm or more and 55 gsm or less, and more preferably 34 gsm or more and 53 gsm or less. The air permeability of the tipping paper 40 is not particularly limited, but is usually 0 Coresta units or more and 30,000 Coresta units or less, and preferably more than 0 Coresta units and 10,000 Coresta units or less. The air permeability is a value measured in accordance with ISO 2965:2009, and is the rate at which an area of ​​1 cm2 is lost per minute when the differential pressure between both sides of the paper is 1 kPa. 2 Flow rate of gas passing through (cm 3 ) 1 Coresta Unit (1 Coresta Unit, 1 C.U.) is cm under 1 kPa. 3 / (min·cm 2 )

[0038] In addition to the pulp, the tipping paper 40 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc. Among these, calcium carbonate is particularly preferred from the viewpoints of improving whiteness and opacity and increasing the heating rate. These fillers may be used alone or in combination of two or more.

[0039] In addition to the pulp and fillers described above, various auxiliary agents may be added to the tipping paper 40. For example, the tipping paper 40 may contain a water resistance improver to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, and polyamide epichlorohydrin (PAE). Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

[0040] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 40. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred.

[0041] A portion of the outer surface of the tipping paper 40 may be covered with a lip release material. The lip release material refers to a material configured to help the lip and tipping paper 40 to easily separate without causing substantial sticking when the user holds the filter portion 30 of the stick 1 in their mouth. The lip release material may contain, for example, ethyl cellulose, methyl cellulose, etc. For example, the outer surface of the tipping paper 40 may be coated with the lip release material by applying an ethyl cellulose-based or methyl cellulose-based ink to the outer surface of the tipping paper 40. The wrapping paper 33 of the filter portion 30 may also be formed from the same material as the tipping paper 40, for example.

[0042] [Configuration of tobacco section 10] {Aerosol Source 11} The aerosol source 11 has a filling portion 51 filled with tobacco, and a tobacco sheet 52 formed from pulverized tobacco leaves and wrapped around the filling portion 51.

[0043] (Filling section 51) Examples of materials for the filling section 51 include lamina and ribs. Examples of materials for the filling section 51 include shredded tobacco leaves. The filling section 51 may also be shredded tobacco pulverized material obtained by pulverizing dried tobacco leaves to an average particle size of 20 μm to 200 μm, homogenizing the pulverized tobacco, and then processing the homogenized material into a sheet (hereinafter, sometimes referred to as a "homogenized sheet"). The filling section 51 may also be shredded homogenized sheets having a size approximately equal to the size of the tobacco section 10 in the centerline direction, cut approximately parallel to the centerline direction of the tobacco section 10. Examples of widths for the filling section 51 include 0.5 mm to 2.0 mm. The filling section 51 may also be formed by folding a homogenized sheet having a size approximately equal to the size of the tobacco section 10 in the centerline direction in a gathered shape, in other words, by folding the homogenized sheet multiple times parallel to the centerline direction. The filling section 51 may also be tobacco granules formed by molding tobacco powder into granules.

[0044] The type of tobacco used as the tobacco leaves for producing the filler section 51 is not particularly limited. Examples include flue-cured tobacco, burley tobacco, oriental tobacco, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures can be used by appropriately blending varieties to achieve the desired flavor. Details of tobacco varieties are disclosed in "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009.

[0045] The method for producing a homogenized sheet, i.e., the method for pulverizing tobacco leaves and processing them into a homogenized sheet, is not particularly limited. For example, a method using a papermaking process can be used. Alternatively, a method may be used in which an appropriate solvent such as water is mixed with pulverized tobacco leaves to homogenize them, and then the homogenized mixture is thinly cast onto a metal plate or metal plate belt. Alternatively, a method may be used in which an appropriate solvent such as water is mixed with pulverized tobacco leaves to homogenize them, and the homogenized mixture is extruded into a sheet to produce a rolled sheet. Details of the types of homogenized sheets are disclosed in "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009.

[0046] The moisture content of the filling section 51 can be 10% by mass or more and 15% by mass or less, and preferably 11% by mass or more and 13% by mass or less, relative to the total amount of the aerosol source 11. Such a moisture content can suppress the occurrence of stains on the tobacco section 10 and improve the suitability for wrapping during the production of the tobacco section 10.

[0047] Depending on the intended use, the filling portion 51 may contain extracts and / or components thereof from various natural products, such as glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.

[0048] The content of the extract substance and / or its constituent components in filling portion 51 is usually 5% by mass or more, and preferably 10% by mass or more, relative to the total mass of aerosol source 11, from the viewpoint of generating a sufficient aerosol and imparting a good flavor. Moreover, the content of the extract substance and / or its constituent components in filling portion 51 is usually 50% by mass or less, and preferably 15% by mass or more and 25% by mass or less.

[0049] The filling portion 51 may contain a flavoring. The type of flavoring is not particularly limited, but menthol is particularly preferred from the viewpoint of imparting a good flavor. Furthermore, one type of flavoring may be used alone, or two or more types may be used in combination.

[0050] (Tobacco Sheet 52) The tobacco sheet 52 can be produced, for example, by a known method such as paper making, slurrying, or rolling using the above-mentioned types of tobacco leaves. In the case of papermaking, tobacco can be produced by a method including the following steps: 1) Dried tobacco leaves are roughly crushed and extracted with water to separate the water extract and residue. 2) The water extract is dried and concentrated under reduced pressure. 3) Pulp is added to the residue, which is then fiberized in a refiner and made into paper. 4) A concentrated solution of the water extract is added to the paper-made sheet and dried to produce a tobacco sheet. In this case, a step of removing some components such as nitrosamines may be added (see JP 2004-510422 A). Note that tobacco sheets produced by papermaking are sometimes called "papermaking sheets."

[0051] In the case of the slurry method, tobacco sheets can be produced by a method including the following steps: 1) Mixing water, pulp, and a binder with crushed tobacco leaves; 2) Spreading (casting) the mixture into a thin layer and drying it. In this case, a step of irradiating the slurry of water, pulp, and a binder with crushed tobacco leaves with ultraviolet light or X-rays to remove some of the components such as nitrosamines may be added. Note that tobacco sheets produced using the slurry method are sometimes called "cast sheets." In the rolling method, a mixture of water, pulp, a binder, and crushed tobacco leaves is pressed, stretched, and dried. Tobacco sheets produced using the rolling method are sometimes called "laminated sheets."

[0052] Alternatively, as described in WO 2014 / 104078, a nonwoven tobacco sheet produced by a method including the following steps can be used: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) forming the laminate into a fixed shape by thermal welding to obtain a nonwoven tobacco sheet. Note that a nonwoven tobacco sheet produced by a method including the above steps may also be referred to as a "nonwoven fabric sheet."

[0053] The composition of the tobacco sheet 52 is not particularly limited. For example, the tobacco leaf content is preferably 50% by mass or more and 95% by mass or less relative to the total mass of the tobacco sheet 52. The tobacco sheet 52 may also contain a binder, and examples of such binders include guar gum, xanthan gum, carboxymethyl cellulose, and sodium salts of carboxymethyl cellulose. The amount of binder is preferably 1% by mass or more and 10% by mass or less relative to the total mass of the tobacco sheet 52. The tobacco sheet 52 may further contain other additives. Examples of additives include fillers such as pulp.

[0054] Polyols such as glycerin, propylene glycol, and 1,3-butanediol may be added to the tobacco sheet 52. The amount of polyol added to the tobacco sheet is preferably 5% by mass or more and 50% by mass or less, and more preferably 15% by mass or more and 25% by mass or less, based on the dry mass of the tobacco sheet.

[0055] The aerosol source 11 may have one tobacco sheet 52, or two or more sheets may be stacked together. When wrapping the filling section 51 in the tobacco sheet 52 into a cylindrical shape, for example, an end of the tobacco sheet 52 and an end of the tobacco sheet 52 on the opposite side may be overlapped by about 2 mm in the circumferential direction and glued together to form a cylindrical shape, and the filling section 51 may be filled inside the tobacco sheet 52. The size of the rectangular tobacco sheet 52 can be determined depending on the size of the filling section 51.

[0056] In the case where the aerosol source 11 has two or more tobacco sheets 52, for example, a plurality of tobacco sheets 52, each having a side approximately the same size as the centerline of the filling section 51, are wound in a direction perpendicular to the centerline so as to be concentrically arranged. "Concentrically arranged" means that the centers of all the tobacco sheets 52 are located at approximately the same position.

[0057] Two or more tobacco sheets 52 may all have the same composition or physical properties, or some or all of the tobacco sheets 52 may have different compositions or physical properties. Furthermore, the thickness of each tobacco sheet 52 may be the same or different. While there are no limitations on the thickness of each tobacco sheet 52, a thickness of 150 μm or more and 1000 μm or less is preferred, and 200 μm or more and 600 μm or less is more preferred, taking into account the balance between heat transfer efficiency and strength.

[0058] The packing density of the aerosol source 11 is not particularly limited, but is usually 250 mg / cm from the viewpoint of ensuring the performance of the stick 1 and imparting a good flavor. 3 or more, preferably 300 mg / cm 3 The packing density of the aerosol source 11 is usually 400 mg / cm 3 or less, preferably 350 mg / cm 3 The following is the result.

[0059] Additionally, aerosol source 11 may include a non-tobacco-derived aerosol made from plants other than tobacco (e.g., mint, herbs, etc.) As an example, aerosol source 11 may include a flavoring ingredient such as menthol.

[0060] {Scroll 12} The cigarette paper 12 may be made primarily of pulp, for example. The pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp, such as flax pulp, hemp pulp, sisal pulp, or esparto, which are commonly used in cigarette papers 12 for tobacco products. The cigarette paper 12 may also be made by bonding a material similar to the tobacco sheet 52 to a material made primarily of pulp. Usable types of pulp include chemical pulp produced by kraft cooking, acidic, neutral or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc.

[0061] Pulp is used in a papermaking process using a Fourdrinier paper machine, a cylinder paper machine, a combined cylinder / short-cylinder paper machine, or the like to adjust and homogenize the texture of the cigarette paper 12. If necessary, a wet strength agent can be added to impart water resistance to the cigarette paper 12, or a sizing agent can be added to adjust the printing quality of the cigarette paper 12. Furthermore, internal papermaking aids such as 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, antifoaming agents, pitch control agents, and slime control agents, can be added.

[0062] The basis weight of the base paper for the cigarette paper 12 is, for example, usually 20 gsm or more, preferably 25 gsm or more, while the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less. The thickness of the cigarette paper 12 is not particularly limited, and from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, it is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more. The thickness of the cigarette paper 12 is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.

[0063] The shape of the cigarette paper 12 used to produce the tobacco section 10 can be, for example, square or rectangular. The length of one side of the cigarette paper 12 can be, for example, approximately 12 mm to 70 mm, and the length of the other side can be, for example, 15 mm to 28 mm, with the other side preferably being, for example, 22 mm to 24 mm, and more preferably, approximately 23 mm. When wrapping the aerosol source 11 in the cigarette paper 12 into a cylindrical shape, for example, an end of the cigarette paper 12 and an end of the cigarette paper 12 opposite it can be overlapped by approximately 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape into which the aerosol source 11 is filled. The size of the rectangular cigarette paper 12 can be determined depending on the size of the tobacco section 10.

[0064] In addition to the above pulp, a filler may be contained in the cigarette paper 12. The content of the filler relative to the total mass of the cigarette paper 12 can be 10% by mass or more and less than 60% by mass, and preferably 15% by mass or more and 45% by mass or less. In the cigarette paper 12, the filler content is preferably 15% by mass or more and 45% by mass or less within the preferred basis weight range (25 gsm or more and 45 gsm or less). Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler content is preferably 15% by weight or more and 45% by weight or less, and when the basis weight is 35 gsm or more and 45 gsm or less, the filler content is preferably 25% by weight or more and 45% by weight or less. As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but calcium carbonate is preferably used from the viewpoint of enhancing flavor and whiteness.

[0065] Various auxiliary agents other than the base paper and fillers may be added to the cigarette paper 12. For example, a water resistance improver may be added to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more. A paper strength agent may be added as an auxiliary, and examples thereof include polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves air permeability (Japanese Patent Laid-Open Publication No. 2017-218699).

[0066] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the wrapping paper 12. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples of such coating agents include polysaccharides such as alginic acid and its salts (e.g., sodium salts), pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose, starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, and ester derivatives such as starch acetate, starch phosphate, and starch octenyl succinate).

[0067] As described above, the stick 1 comprises the tobacco section 10 having an aerosol source containing tobacco, the cooling section 20 that generates aerosol by cooling the vapor generated when the tobacco section 10 is heated by the heating section 121, which is an example of a heating element, and the filter section 30 through which the aerosol passes. In the tobacco section 10, the tobacco sheet 52, which is formed using pulverized tobacco leaves and granulated, is disposed near the heating section 121, and the filling section 51, which is filled with tobacco, is disposed farther from the heating section 121 than the tobacco sheet 52. In other words, the heating section 121 is configured in a film-like shape and is disposed so as to cover the outer periphery of the holding section 140, and in the tobacco section 10, the tobacco sheet 52 is wrapped around the filling section 51. By wrapping the filling section 51 with the tobacco sheet 52 in this manner, the tobacco packing density in the outer periphery, which is closer to the heating section 121 in the tobacco section 10, is made higher than the packing density in the interior, which is farther from the heating section 121.

[0068] The above configuration is based on the inventors' extensive research and discovery that if the tobacco packing density in the tobacco section 10 near the heated section 121 is higher than the packing density in the tobacco section farther from the heated section 121, the heat from the heated section 121 can be used efficiently to increase the delivery amount of filler such as nicotine and glycerin.

[0069] 3(a) and 3(b) show the results of comparing the amounts of nicotine and glycerin delivered when the aerosol source 11 of the tobacco portion 10 has different configurations. FIG. 4 is a diagram showing a comparison of the configuration of the aerosol source 11. As shown in FIG. 4, Sample A uses a cast sheet as the tobacco sheet 52, and has a configuration in which the filling section 51 is wrapped once with a laminated cast sheet and cigarette paper 12 (i.e., a single-wrap configuration). Sample B uses a laminated sheet as the tobacco sheet 52, and has a configuration in which the filling section 51 is wrapped once with a laminated laminated sheet and cigarette paper 12 (i.e., a single-wrap configuration). Sample C does not use a tobacco sheet 52, and has a configuration in which the filling section 51 is wrapped once with cigarette paper 12 (i.e., a single-wrap configuration). Samples A, B, and C all have the same size in the centerline direction, and the sizes in the centerline direction of the tobacco section 10, cooling section 20, first filter 31, and second filter 32 are 1.2 mm, 2.8 mm, 8 mm, and 7 mm, respectively. The air inflow ratio through the openings V is 70% by volume.

[0070] In Samples A, B, and C, the filling rate of the filler portion 51 is adjusted so that the tobacco fill amount (mgWB) in the tobacco portion 10, including the amount of raw material for the tobacco sheet 52, is the same. For example, as shown in Figure 4, in Sample C, which does not use the tobacco sheet 52, the fill amount of the filler portion 51, in other words, the fill amount of the tobacco portion 10, is 264 mgWB, whereas in Sample A, the fill amount of the laminate sheet and cigarette paper 12 bonded together is 39 mgWB and the fill amount of the filler portion 51 is 225 mgWB. In Sample B, the fill amount of the laminate sheet and cigarette paper 12 bonded together is 56 mgWB and the fill amount of the filler portion 51 is 208 mgWB. In sample A, the fill ratio of the cast sheet and wrapping paper 12 bonded together is 14.8 (= 39 / 264 × 100)%, and in sample B, the fill ratio of the laminate sheet and wrapping paper 12 bonded together is 21.2 (= 56 / 264 × 100)%.

[0071] In Sample A, Sample B, and Sample C, the outer diameter of the tobacco portion 10 was the same 7.1 mm, the inner diameter of the laminated cast sheet and cigarette paper 12 in Sample A was 6.75 mm (in other words, a thickness of 0.175 mm), the inner diameter of the laminated laminated sheet and cigarette paper 12 in Sample B was 6.75 mm (in other words, a thickness of 0.175 mm), and the inner diameter of the cigarette paper 12 in Sample C was 7.02 mm (in other words, a thickness of 0.04 mm). The volume of the filling portion 51 was 258 mm for each of Sample A, Sample B, and Sample C. 3 , 238mm 3 , 302mm 3 The volume filling rates of Sample A, Sample B, and Sample C were 60%, 55%, and 65%, respectively.

[0072] FIG. 3 shows a comparison of the amounts of nicotine and glycerin delivered when Sample A, Sample B, and Sample C were heated using the inhalation device 100. The horizontal axis shows the number of puffs (inhalations) of the stick 1, and the amount of nicotine and glycerin delivered was measured for each inhalation. The heating using the inhalation device 100 began with the target temperature of the heating element 121 set to 280°C from an unheated state, heating for 15 seconds, and then the target temperature was kept constant at 260°C. The 15 seconds correspond to the time it takes for the heating element 121 to reach 280°C from an unheated state, in other words, from a state where the heating element 121 is at ambient temperature (e.g., room temperature). The puffing conditions used to measure the amount of delivery were as follows: An automatic smoking machine (Borgwaldt Single Port Smoking Machine R26) was used, and the test was conducted in accordance with the Intense method proposed by Health Canada, with a puff volume of 55 ml, a puff time of 2 seconds, and a 30-second interval between puffs. The aperture V was measured in an open state.

[0073] As shown in Figure 3(a), the nicotine delivery amounts of Samples A and B, in which the aerosol source 11 has a tobacco sheet 52, are greater than the delivery amount of Sample C, which does not have a tobacco sheet 52. In particular, the delivery amount increases significantly from the third puff to the seventh puff. The difference between Samples A and B is not large, but the delivery amount of Sample B, which uses a laminate sheet, is greater than the delivery amount of Sample A, which uses a cast sheet. This is thought to be due to the fact that the fill amount of the laminate sheet and cigarette paper 12 bonded together is greater than the fill amount of the cast sheet and cigarette paper 12 bonded together.

[0074] As shown in Figure 3(b), the delivery amounts of glycerin for Samples A and B, in which the aerosol source 11 has a tobacco sheet 52, are also greater than the delivery amount for Sample C, which does not have a tobacco sheet 52. In particular, the delivery amount increases significantly from the fifth puff to the ninth puff. The difference between Samples A and B is not large, but the delivery amount for Sample B, which uses a laminate sheet, is greater than the delivery amount for Sample A, which uses a cast sheet. This is thought to be due to the fact that the fill amount for the laminate sheet and cigarette paper 12 bonded together is greater than the fill amount for the cast sheet and cigarette paper 12 bonded together.

[0075] The results shown in Figures 3(a) and 3(b) show that when the tobacco packing density in the outer periphery of the tobacco section 10, which is the area closer to the heated section 121, is higher than the packing density in the area farther from the heated section 121, the heat from the heated section 121 can be used more efficiently to increase the amount of nicotine and glycerin delivered.

[0076] The results in Figures 3(a) and 3(b) show that the stick 1 more efficiently utilizes the heat from the heating section 121 to increase the amount of nicotine and glycerin delivered than, for example, a configuration in which the aerosol source 11 does not have a tobacco sheet 52 but the filling section 51 is wrapped in cigarette paper 12, and the tobacco filling density in the aerosol source 11 is uniform from the outer periphery to the inside.

[0077] Here, in the above-mentioned Samples A and B, the tobacco sheet 52 is included and the covering material is wound around the filler portion 51 to an extent of 0.175 mm inward from the outer peripheral surface of the tobacco portion 10, in other words, to approximately 5% of the radius (3.55 mm) of the tobacco portion 10, but this covering material is preferably up to 10% of the radius of the tobacco portion 10. This is because if the covering material that is wound around the filler portion 51 is thick, it will be too rigid and difficult to wind. Therefore, as long as this covering material can be wound, the covering material may be up to 20% of the radius of the tobacco portion 10.

[0078] That is, it is preferable that the packing density of tobacco in the stick 1 be higher in a region extending from the outer peripheral surface of the tobacco portion 10 to 20% of the radius than in a region further inward than 20% of the radius. More preferably, it is preferable that the packing density of tobacco in the stick 1 be higher in a region extending from the outer peripheral surface of the tobacco portion 10 to 10% of the radius than in a region further inward than 10% of the radius. This configuration makes it possible to efficiently use the heat of the heating portion 121 to increase the delivery amount of filler such as nicotine or glycerin.

[0079] The tobacco section 10 has a configuration in which the aerosol source 11 has a tobacco sheet 52 on the outer periphery thereof, and the aerosol source 11 is further wrapped in cigarette paper 12, but is not particularly limited to this configuration. For example, the tobacco section 10 does not need to have cigarette paper 12.

[0080] Furthermore, the means for making the tobacco packing density in the outer periphery of the tobacco section 10 higher than the tobacco packing density in the inner portion is not limited to covering the periphery of the packing section 51 with a covering material including the tobacco sheet 52. FIG. 5 is a diagram showing an example of a vertical cross section of the tobacco section 10 according to a modified example. As shown in Figure 5, the filling section 51 may be composed of a first filling section 511 provided on the outer periphery and a second filling section 512 provided inside the first filling section 511, and the filling density of tobacco in the first filling section 511 may be higher than the filling density of tobacco in the second filling section 512.

[0081] Second Embodiment FIG. 6 is a diagram showing an example of a vertical cross section of the stick 2 according to the second embodiment. The stick 2 according to the second embodiment differs from the stick 1 according to the first embodiment in that it has a tobacco portion 210 that corresponds to the tobacco portion 10. The differences from the first embodiment will be explained below. The same components in the first and second embodiments are designated by the same reference numerals, and detailed explanations thereof will be omitted.

[0082] FIG. 7 is a diagram showing an example of a schematic configuration of a suction device 200 in which the stick 2 according to the second embodiment is used. The suction device 200 in which the stick 2 is used differs from the suction device 100 in which the stick 1 according to the first embodiment is used in that it has a heating unit 221 that corresponds to the heating unit 121. The differences from the suction device 100 will be described below. The same components in the suction device 200 and the suction device 100 are designated by the same reference numerals, and detailed descriptions thereof will be omitted.

[0083] The heating part 221 is configured in a blade shape and is arranged so as to protrude from the center of the bottom part 143 of the holding part 140 in the direction of the center line into the internal space 141 of the holding part 140. Therefore, when the stick 2 is inserted into the holding part 140, the blade-shaped heating part 221 is inserted into the inside of the stick 2 so as to pierce the tobacco part 210 of the stick 2. Then, when the heating part 221 generates heat, the aerosol source contained in the tobacco part 210 of the stick 2 is heated from inside the stick 2 and atomized, generating an aerosol.

[0084] The tobacco section 210 of the stick 2 is configured so that the packing density of tobacco in the central section, which is the section closer to the heated section 221, is higher than the packing density in the peripheral section, which is the section farther from the heated section 221. More specifically, the tobacco section 210 has an aerosol source 211 that generates vapor that generates an aerosol when heated, and cigarette paper 212 that covers the outer periphery of the aerosol source 211 and is similar to the cigarette paper 12. The tobacco section 210 is formed into a cylindrical shape by wrapping the aerosol source 211 in the cigarette paper 212.

[0085] The aerosol source 211 corresponds to the filling portion 51 of the stick 1 and is filled with tobacco. The aerosol source 211 has a cylindrical first filling portion 251 provided on the outer periphery and a cylindrical second filling portion 252 provided inside the first filling portion 251. Furthermore, the filling density of the tobacco in the second filling portion 252 is higher than the filling density of the tobacco in the first filling portion 251.

[0086] For example, the tobacco section 210 can be produced by filling the inside of a first stuffing section 251, which is made by compressing shredded tobacco leaves or the like (hereinafter, may be referred to as "tobacco shreds") into a cylindrical shape, with tobacco shreds to form a second stuffing section 252, and then wrapping the first stuffing section 251 with cigarette paper 212. Alternatively, the tobacco section 210 can be produced by filling the outside of a second stuffing section 252, which is made by compressing shredded tobacco leaves into a cylindrical shape, with tobacco shreds to form a first stuffing section 251, and then wrapping the shredded tobacco with cigarette paper 212.

[0087] It is preferable that the radial thickness of the second stuffing section 252 be configured to be at least 20% of the radius of the tobacco section 210 around the heating section 221 inserted into the second stuffing section 252. More preferably, the radial thickness of the second stuffing section 252 around the heating section 221 is configured to be 10% of the radius of the tobacco section 210.

[0088] Furthermore, the second filling section 252 may have a cylindrical shape before the blade-shaped heating section 221 is inserted. When the second filling section 252 is cylindrical, if the cross section of the heating section 221 has a circular shape, the inner diameter of the second filling section 252 is equal to or smaller than the diameter of the heating section 221, and when the cross section of the heating section 221 has an elliptical shape, the inner diameter of the second filling section 252 is equal to or smaller than the major axis of the heating section 221. When the second filling section 252 is cylindrical, if the cross section of the heating section 221 has a polygonal shape, the inner diameter of the second filling section 252 is equal to or smaller than the diameter of the circumscribing circle or the major axis of the circumscribing ellipse of the heating section 221.

[0089] Furthermore, when the second filling section 252 is cylindrical, it may be configured to include at least any one of the tobacco sheets described above, namely, a paper-made sheet, a cast sheet, a laminated sheet, and a nonwoven fabric sheet. For example, the cylindrical second filling section 252 may be formed by wrapping a paper-made sheet multiple times. Furthermore, when the second filling section 252 is configured to include at least any one of the tobacco sheets, namely, a paper-made sheet, a cast sheet, a laminated sheet, and a nonwoven fabric sheet, it is preferable to form the first filling section 251 by filling tobacco shreds around the second filling section 252, and then wrap the outside of the filled tobacco shreds with cigarette paper 212.

[0090] The tobacco section 210 of the stick 2 configured as described above is heated from the inside by a heating section 221, which is an example of a heating element, arranged inside the tobacco section 210, and the packing density of the second filling section 252 arranged inside is higher than the packing density of the first filling section 251 arranged outside. With this configuration, the heat of the heating section 221 can be efficiently used to increase the delivery amount of filling material such as nicotine and glycerin.

[0091] The stick 2 may have a support part between the tobacco part 210 and the cooling part 20 that supports the tobacco part 210 in order to prevent the aerosol source 211 from moving to the second side in the center line direction when the blade-shaped heating part 221 is inserted into the tobacco part 210. The support part is a cylindrical member, and can be, for example, the same as the first filter 31.

[0092] <Third embodiment> FIG. 8 is a diagram showing an example of a vertical cross section of the stick 3 according to the third embodiment. The stick 3 according to the third embodiment differs from the stick 1 according to the first embodiment in that it has a tobacco section 310, which corresponds to the tobacco section 10. The tobacco section 310 has an aerosol source 311 that generates vapor that generates an aerosol when heated, and cigarette paper 312 that is similar to cigarette paper 12 and covers the outer periphery of the aerosol source 311, as well as a susceptor 313, which will be described later. Differences from the first embodiment will be explained below. The same reference numerals will be used for the same parts in the first and third embodiments, and detailed explanations thereof will be omitted.

[0093] FIG. 9 is a diagram showing an example of a schematic configuration of a suction device 300 in which the stick 3 according to the third embodiment is used. The suction device 300 in which the stick 3 is used differs from the suction device 100 in which the stick 1 according to the first embodiment is used in that it includes an electromagnetic induction source 321 instead of the heating unit 121. The differences from the suction device 100 will be described below. The same components in the suction device 300 and the suction device 100 are designated by the same reference numerals, and detailed descriptions thereof will be omitted.

[0094] The electromagnetic induction source 321 generates heat in the susceptor 313 of the stick 3 by electromagnetic induction. The electromagnetic induction source 321 is formed, for example, of a coil-shaped conducting wire and is arranged so as to be wound around the outer periphery of the holder 140. The electromagnetic induction source 321 generates a magnetic field when an alternating current is supplied from the power supply unit 111. The electromagnetic induction source 321 is arranged at a position where the generated magnetic field is superimposed on the internal space 141 of the holder 140. Therefore, when a magnetic field is generated while the stick 3 is held by the holder 140, an eddy current is generated in the susceptor 313, generating Joule heat. The aerosol source 311 included in the stick 3 is then heated and atomized by this Joule heat, generating an aerosol.

[0095] The susceptor 313 generates heat by electromagnetic induction. The susceptor 313 is made of a conductive material such as metal. For example, the susceptor 313 is a metal piece. The susceptor 313 is disposed inside the aerosol source 311. For example, the susceptor 313 may be shaped like a rectangular parallelepiped or a cylinder.

[0096] The aerosol source 311 has a cylindrical first loading section 351 provided on the outer periphery, and a second loading section 352 provided inside the first loading section 351 and arranged around the susceptor 313. The loading density of the tobacco in the second loading section 352 is higher than the loading density of the tobacco in the first loading section 351.

[0097] For example, the tobacco section 310 can be produced by filling tobacco shreds around a susceptor 313 inside a first stuffing section 351, which is made by compressing tobacco shreds into a cylindrical shape, to form a second stuffing section 352, and then wrapping the first stuffing section 351 with cigarette paper 312. Alternatively, the tobacco section 310 can be produced by filling tobacco shreds around the outside of a second stuffing section 352, which is made by compressing tobacco shreds into a cylindrical shape around a susceptor 313, to form the first stuffing section 351, and then wrapping the tobacco shreds with cigarette paper 312.

[0098] The second filling section 352 may be formed by wrapping the susceptor 313 with at least one tobacco sheet selected from the above-mentioned molded sheet, cast sheet, laminated sheet, and nonwoven fabric sheet. For example, the second filling section 352 may be formed by wrapping the susceptor 313 with a molded sheet multiple times. When the second filling section 352 is formed including at least one tobacco sheet selected from the above-mentioned molded sheet, cast sheet, laminated sheet, and nonwoven fabric sheet, the first filling section 351 may be formed by filling the periphery of the second filling section 352 with tobacco shreds, and the outside of the filled tobacco shreds may be wrapped with cigarette paper 312.

[0099] It is preferable that the minimum radial thickness of the second filling section 352 around the susceptor 313 arranged inside the second filling section 352 is at least 20% of the radius of the tobacco section 310. More preferably, the minimum radial thickness of the second filling section 352 around the susceptor 313 is 10% of the radius of the tobacco section 310.

[0100] The tobacco section 310 of the stick 3 configured as described above is heated from the inside by a susceptor 313, which is an example of a heating element, arranged inside the tobacco section 310, and the packing density of the second packed section 352 arranged inside is higher than the packing density of the first packed section 351 arranged outside. With this configuration, the heat of the susceptor 313 can be efficiently used to increase the delivery amount of the packed material, such as nicotine or glycerin. [Explanation of symbols]

[0101] 1...non-combustion heating stick, 10,210,310...tobacco part, 11,211,311...aerosol source, 12,212,312...cigarette paper, 20...cooling part, 30...filter part, 40...tipping paper, 51...filling part, 52...tobacco sheet, 121,221...heating part (an example of a heating element), 251,351,511...first filling part, 252,352,512...second filling part, 313...susceptor (an example of a heating element), 321...electromagnetic induction source

Claims

1. a tobacco portion having an aerosol source containing tobacco; a cooling unit that cools the vapor generated by heating the tobacco portion with a heating element to generate an aerosol; a filter portion through which the aerosol passes; Equipped with the tobacco portion is heated from the outside by the heating element disposed outside the tobacco portion, and the packing density of the tobacco at the outside is higher than the packing density at the inside; The tobacco section has a filling section filled with tobacco, and a tobacco sheet formed using pulverized tobacco leaves and wrapped around the filling section so as to be in contact with the filling section. Non-combustion heating stick.

2. The tobacco sheet is at least one of a cast sheet, a laminated sheet, and a paper-made sheet. The non-combustion heating stick according to claim 1.

3. The tobacco sheet is formed by laminating at least one sheet selected from the group consisting of a cast sheet, a laminate sheet, and a paper-formed sheet. The non-combustion heating stick according to claim 2.

4. a tobacco portion having an aerosol source containing tobacco; a cooling unit that cools the vapor generated by heating the tobacco portion with a heating element to generate an aerosol; a filter portion through which the aerosol passes; Equipped with The tobacco section is a tobacco sheet formed using pulverized tobacco leaves and placed near the heating element, and a filling section filled with tobacco is placed farther from the heating element than the tobacco sheet, the tobacco portion is heated from the outside by the heating element disposed outside the tobacco portion, and the tobacco sheet is wrapped around the outer periphery of the filling portion so as to be in contact with the filling portion; Non-combustion heating stick.

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