Stick for flavor inhalation, and flavor inhalation system

Abstract

This stick 1 is a non-combustion heating type stick which is for flavor inhalation and used while being heated by a heating device, the stick 1 comprising: a base material part 10 that includes a flavor source 11; and a cooling part 20 that cools steam and / or aerosol generated by heating the base material part 10 during use, and maintains an internal temperature at a temperature greater than 100°C.

Description

Flavor inhalation stick and flavor inhalation system

[0001] The present disclosure relates to a flavor inhalation stick and a flavor inhalation system.

[0002] Patent Literature 1 describes a non-combustible heat-not-burn tobacco having a tobacco rod portion, a mouthpiece portion, and a wrapping portion formed by wrapping the tobacco portion and the mouthpiece portion with tipping paper, at least a portion of which is coated with a lip release agent. Patent Literature 1 discloses that the wrapping portion is composed of a first region including the mouth-side end of the non-combustible heat-not-burn tobacco and a second region located closer to the tobacco rod portion of the wrapping portion than the first region, and that the content of lip release agent per unit area in the second region is lower than the content of lip release agent per unit area in the first region. Patent Literature 1 also discloses that the mouthpiece portion includes a cooling section.

[0003] Japanese Patent Application Laid-Open No. 2022-82658

[0004] In a non-combustion heating type flavor inhalation stick that is heated by a heating device, the high-temperature vapor or aerosol generated by heating is cooled before being delivered to the user's mouth. Furthermore, the components delivered to the user's mouth may include not only components that improve the flavor and taste, but also components that have undesirable effects on the flavor and taste. The inventors have found that the temperature of the vapor or aerosol affects the filtration rate of these components within the flavor inhalation stick. An object of the present disclosure is to provide a flavor inhalation stick and a flavor inhalation system that selectively filters components generated by heating.

[0005] One aspect of the present disclosure provides a non-combustion-heating type flavor inhalation stick that is heated by a heating device and used, the flavor inhalation stick comprising: a substrate containing a flavor source; and a cooling section that, during use, cools vapor and / or aerosol generated by heating the substrate and maintains an internal temperature above 100°C. The cooling section may maintain the internal temperature during use at a temperature higher than 100°C and not higher than 200°C at the lowest temperature location within the cooling section. The cooling section may also maintain the internal temperature during use at a temperature higher than 100°C and not higher than 200°C at the location farthest from the substrate within the cooling section. When the cooling section is formed of a cylindrical member, the internal temperature may be the temperature of the inner wall of the cylindrical member. The cooling section may also include at least one of aluminum-laminated paper, copper foil, and carbon paper. Furthermore, a communication passage connecting the outside and the inside may be formed downstream of the longitudinal center of the cooling unit within the region in which the cooling unit is disposed. Furthermore, the system may include a filter unit having a first filter with a hollow portion adjacent to the downstream side of the cooling unit, and a solid second filter adjacent to the downstream side of the first filter. Furthermore, one aspect of the present disclosure provides a flavor inhalation system comprising the flavor inhalation stick and a heating device that heats the flavor inhalation stick.

[0006] According to the present disclosure, it is possible to provide a flavor inhalation stick and a flavor inhalation system that selectively filter components generated by heating.

[0007] 1 is a diagram showing an example of a longitudinal section of a flavor inhalation stick; FIG. 2 is a schematic diagram showing an example of the internal configuration of a heating device; FIG. 3 is a diagram showing an example and a comparative example of a flavor inhalation stick according to the first embodiment, where (A) is a longitudinal section of a stick according to the example, and (B) is a longitudinal section of a stick according to the first comparative example; FIG. 4 is a diagram showing other comparative examples of the flavor inhalation stick according to the first embodiment, where (A) is a longitudinal section of a stick according to the second comparative example, and (B) is a longitudinal section of a stick according to the third comparative example; FIG. 5 is a diagram showing a comparison result of internal temperature when the configuration of the cooling unit is changed; FIG. 6 is a diagram showing the relationship between internal temperature and the filtration rate of various components, where (A) is the filtration rate of nicotine, (B) is the filtration rate of NNN, and (C) is the filtration rate of NNK; FIG. 7 is a diagram showing a comparison result of nicotine delivery when the configuration of the cooling unit is changed, where (A) is the filtration rate of nicotine, and (B) is the released amount of nicotine.

[0023] Figure 1 shows a comparison of the filtration rates of TSNA when the configuration of the cooling unit is changed, with (A) showing the filtration rate of NNN and (B) showing the filtration rate of NNK. Figure 2 shows a comparison of the release amount of TSNA when the configuration of the flavor inhalation stick is changed, with (A) showing the release amount of NNN and (B) showing the release amount of NNK. Figure 3 shows a longitudinal cross section of a flavor inhalation stick according to a second embodiment. Figure 4 shows a longitudinal cross section of a flavor inhalation stick according to a third embodiment.

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, in which the same parts are designated by the same reference numerals.

[0009] First Embodiment Fig. 1 is a diagram showing an example of a longitudinal cross section of a flavor inhalation stick 1. Fig. 2 is a schematic diagram showing an example of the internal configuration of a heating device 100. A flavor inhalation system according to this embodiment includes a flavor inhalation stick (hereinafter sometimes referred to as a "stick") 1 and a non-combustion heating device 100 that heats a substrate 10 of the stick 1 from the outside. The stick 1 is inserted into the non-combustion heating device 100 for use. The stick 1 includes the substrate 10 and a cooling device 20. The stick 1 also includes a filter device 30. The stick 1 further includes tipping paper 40 that connects the substrate 10, the cooling device 20, and the filter device 30. The tipping paper 40 has a communication passage 60 that connects the outside and inside of the stick 1. Hereinafter, the direction of the center line CL of the substrate 10 may be referred to as the "center line direction." The stick 1 has a base material part 10, a cooling part 20, and a filter part 30 arranged in this order along the center line, and is wrapped with tipping paper 40 to unite these parts.

[0010] In this specification, 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 heating device 100. The second side is the end side opposite the first 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 along a plane perpendicular to the center line direction is defined as a "transverse cross section."

[0011] 2 , the heating device 100 includes a power supply unit 111 that stores power and supplies power to each component of the heating device 100, a sensor unit 112 that detects various information related to the heating device 100, and a notification unit 113 that notifies the user of the information. The heating device 100 also includes a memory unit 114 that stores various information for the operation of the heating device 100, a communication unit 115 that transmits and receives information between the heating device 100 and other devices, and a control unit 116 that controls overall operation within the heating device 100. The heating 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 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 heating device 100. In the heating device 100, the user inhales while the stick 1 is held in the holding unit 140.

[0012] The heating unit 121 heats the base material 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 configured in a film shape and is arranged to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the flavor 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 one example, power may be supplied when the sensor unit 112 detects that a predetermined user input has been made. 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 an aerosol may be generated during a 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 to create a high vacuum state, thereby reducing the heat conduction by gas to as close to zero as possible.

[0014] (Stick 1) The stick 1 can be exemplified as a non-combustion heating type flavor inhalation article that releases flavor components when the base material 10 is heated, for example. The cross section of the stick 1 is, for example, substantially circular, and the outer diameter and size in the center line direction can be appropriately changed to suit the desired size.

[0015] ((Substrate portion 10)) The substrate portion 10 is a portion where aerosol is generated by heating. The substrate portion 10 has a flavor source 11 that generates aerosol by heating, and a wrapping paper 12 that covers the outer periphery of the flavor source 11. The substrate portion 10 is formed, for example, in a cylindrical shape. The substrate portion 10 is connected (coupled) to the cooling portion 20 by integrally winding the substrate portion 10 and the cooling portion 20 using tipping paper 40. The cross-sectional area and centerline direction size of the substrate portion 10 can be appropriately changed according to the size of the stick 1. At least a portion of the substrate portion 10 is accommodated in the space 141 of the holding portion 140 when the stick 1 is held in the holding portion 140. Note that a member separate from the substrate portion 10 may be arranged on the first side (upstream side) of the substrate portion 10. This separate member is, for example, a member that prevents the flavor source 11 from falling off from the end face of the first side of the substrate portion 10.

[0016] The content of the flavor source 11 contained in the base material 10 can be appropriately changed according to the size of the stick 1. The flavor source 11 may be a tobacco-derived material, such as dried tobacco leaves (dried tobacco leaves) or a processed product obtained by molding tobacco shreds or tobacco raw materials into granules, sheets, or powder. The flavor source 11 may also include a non-tobacco-derived material made from plants other than tobacco (e.g., mint and herbs). The flavor source 11 may also include a flavoring. The flavor source 11 may also include dried tobacco leaves and a flavoring-containing material in which a flavoring is encapsulated in a polysaccharide gel. The type of flavoring is not particularly limited, and menthol is particularly preferred from the viewpoint of imparting a good flavor. The flavoring contained in the flavor source 11 may be used alone or in combination of two or more types. Furthermore, when the heating device 100 is a medical inhaler, the flavor source 11 may include a medication to be inhaled by the patient. The components constituting the flavor source 11 are not limited to solid materials, but may include, for example, polyhydric alcohols such as glycerin and propylene glycol, and liquid materials such as water. The form of the flavor source 11 is not limited to solid or semi-solid, but may be, for example, a capsule containing a liquid material.

[0017] Furthermore, when the flavor source 11 is derived from tobacco, the type of tobacco used is not particularly limited, and various known types can be used. Examples of types of tobacco include flue-cured tobacco, burley tobacco, oriental tobacco, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures are used by appropriately blending various varieties to achieve the desired flavor. Furthermore, even when the flavor source 11 is derived from tobacco, it may contain extracts and / or components thereof from various natural products depending on the intended use. Examples of extracts and / or components thereof include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.

[0018] Furthermore, when the flavor source 11 is a processed product obtained by forming tobacco shreds or tobacco raw materials into a sheet (hereinafter referred to as "tobacco sheet"), it can be appropriately manufactured by known methods such as papermaking, slurrying, rolling, etc. Furthermore, the tobacco sheet may be produced by grinding dried tobacco leaves to obtain tobacco grounds, homogenizing this using known means, and then processing it into a sheet. The number of tobacco sheets may be one or two or more. The two or more tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties. Furthermore, the thickness of each tobacco sheet may be the same or different.

[0019] When the flavor source 11 is composed of a single tobacco sheet, for example, a tobacco sheet having one side approximately the same size as the centerline of the substrate 10 is packed in a state where it is folded back multiple times horizontally to the centerline of the substrate 10 (so-called gathered sheet). Another example is a tobacco sheet having one side approximately the same size as the centerline of the substrate 10 and wound in a direction perpendicular to the centerline of the substrate 10. When the flavor source 11 is composed of two or more tobacco sheets, for example, a tobacco sheet having one side approximately the same size as the centerline of the substrate 10 is packed in a state where it is wound in a direction perpendicular to the centerline of the substrate 10 so as to be concentrically arranged. "Concentrically arranged" means that the centers of all the tobacco sheets are arranged at approximately the same position. The flavor source 11 may also be a shredded tobacco sheet. Furthermore, the flavor source 11 may be a so-called strand type, in which a tobacco sheet having a size approximately the same as the size of the base material 10 in the center line direction is packed and cut approximately parallel to the center line direction.

[0020] The cigarette paper 12 is not particularly limited in composition and may be of a general type, such as one primarily composed of pulp. Pulp may be produced from wood pulp, such as softwood pulp or hardwood pulp, or may be produced by blending non-wood pulp, such as flax pulp, hemp pulp, sisal pulp, or esparto, which are commonly used in cigarette papers 12 for tobacco products. Pulp types that can be used include chemical pulp produced by kraft cooking, acidic, neutral, or alkaline sulfite cooking, or soda cooking, ground pulp, chemi-ground pulp, and thermomechanical pulp. The cigarette paper 12 may contain a filler, such as calcium carbonate, in order to improve whiteness and opacity and increase the heating rate. The cigarette paper 12 may also contain various additives, and a coating agent may be added to at least one of its two surfaces, the front and back surfaces.

[0021] The shape of the cigarette paper 12 used to produce the substrate 10 can be, for example, a square or a rectangle. The size of the cigarette paper 12 can be determined depending on the size of the substrate 10. When the substrate 10 is wrapped 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 on the opposite side are overlapped by about 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape into which the flavor source 11 is filled. Furthermore, when a cylindrical paper tube is formed in advance using the cigarette paper 12, the flavor source 11 may be filled into the paper tube formed by the cigarette paper 12, for example.

[0022] ((Filter Section 30)) The filter section 30 is located on the second side (downstream side) of the cooling section 20. The filter section 30 has a first filter 31 connected to the second side of the cooling section 20 and a second filter 32 located on the second side of the first filter 31. The first filter 31 has a hollow cross section, and the second filter 32 has a solid cross section. The first filter 31 is a so-called center-hole filter, which has a hollow portion approximately at the center of the cross section along the center line direction. The filter section 30 is connected (coupled) by integrally winding up the second side end of the cooling section 20 and the first side end of the filter section 30 using tipping paper 40. The filter section 30 may also have a wrapping paper 33 wound between the outer peripheral surfaces of the first filter 31 and the second filter 32 and the tipping paper 40. If the filter section 30 has two or more filters, each of these two or more filters may be wrapped in a separate wrapping paper before being wrapped together in the wrapping paper 33. The filter unit 30 may be a plain filter made up of a single filter, or a multi-segment filter made up of three or more types of filters.

[0023] The cross sections of the first filter 31 and the second filter 32 of the filter unit 30 are substantially circular, and the diameter and perimeter of the circle can be adjusted to suit the size of the product. If the cross section is not circular, the diameter is assumed to be the diameter of a circle having the same area as the cross section, and the diameter of that circle is used. The size of the filter unit 30 in the centerline direction can be adjusted to suit the size of the stick 1, but is typically 5.0 mm to 35.0 mm, preferably 10.0 mm to 30.0 mm, and more preferably 15.0 mm to 25.0 mm. The shape and dimensions of the first filter 31 and the second filter 32 can be adjusted to suit the shape and dimensions of the filter unit 30 within the above ranges.

[0024] The airflow resistance per 120 mm of the size in the center line direction of the second filter 32 is not particularly limited, but is usually 40 mmH ２ O or more, 300mmH ２ O or less, 70 mmH ２ O or more, 280mmH２ It is preferable that the pressure is 90 mmH or less. ２ O or more, 260mmH ２ It is more preferable that the airflow resistance is 0 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 air pressure difference between the first side and the second side when air is flowed at a predetermined air flow rate (17.5 cc / min) from the first side to the second side in a state where air does not pass through the side surface of the filter unit 30. The unit is generally mmH ２ It is represented by O.

[0025] 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. Typical filter functions include, for example, reducing unpleasant sensations such as irritation, and reducing nicotine and tar, but they do not necessarily have to have all of these functions. Furthermore, since sticks 1 tend to produce fewer components and have a lower loading rate of flavor source 11 in the base material 10 than cigarette products, preventing the flavor source 11 from falling off while suppressing filtration and adjusting the airflow resistance to provide a moderate ease of inhalation are also important functions. The filter material constituting the first filter 31 and the second filter 32 may be, for example, a columnar filler made of acetate, charcoal, cellulose fiber, nonwoven fabric, pulp paper, or the like. Alternatively, a paper filter filled with sheet-like pulp paper may be used. The first filter 31 and the second filter 32 may also contain, as appropriate, known flavors (e.g., menthol), adsorbents, granular activated carbon, flavor retention materials, and the like.

[0026] The wrapping paper 33 may be made primarily of pulp. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by blending non-wood pulp commonly used in tobacco wrapping papers, 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. The wrapping paper 33 may also contain fillers such as calcium carbonate.

[0027] The wrapping paper 33 may be of any suitable configuration, including one or more rows of adhesive-containing seams. The adhesive may include a hot-melt adhesive, and the hot-melt adhesive may further include polyvinyl alcohol. The adhesive may also include a vinyl acetate adhesive. The wrapping paper 33 may be coated or uncoated, but is preferably coated with a desired material to provide functions such as strength and structural rigidity. The wrapping paper 33 may be made of plastic, a polymer sheet, or the like. The wrapping paper 33 may also be a porous member having a plurality of pores formed therein.

[0028] (Tipping Paper 40) The tipping paper 40 is wound around the outer peripheral surfaces of the substrate portion 10, the cooling portion 20, and the filter portion 30. The shape of the tipping paper 40 is not particularly limited and may be, for example, square or rectangular. The configuration of the tipping paper 40 is not particularly limited and may be a common form, for example, tipping paper containing pulp as the main component. 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 combination of multiple types in any ratio. The tipping paper 40 may also contain a filler, such as calcium carbonate, in order to improve whiteness and opacity and increase the heating rate. The tipping paper 40 may also contain various auxiliary agents, such as a water resistance improver including a wet strength agent (WS agent) and a sizing agent.

[0029] 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. "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 (cm３ 1 C.U. is expressed as cm under 1 kPa. ３ / (min cm ２ )

[0030] A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 40. The coating agent for the tipping paper 40 is not particularly limited, but a coating agent that can form a film on the surface and reduce liquid permeability is preferred. A portion of the outer surface of the tipping paper 40 may also be coated with a known lip release material. The lip release material refers to a material configured to help the user easily separate the tipping paper 40 from their lips without causing substantial stickiness when they hold 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.

[0031] ((Communicating passage 60)) The communicating passage 60 connects the outside and the inside of the stick 1. Therefore, the communicating passage 60 allows air from outside the stick 1 to flow into the inside during inhalation. Examples of the shape of the communicating passage 60 include a cylindrical shape, an elliptical cylindrical shape, a polygonal prism, a rounded polygonal prism, and a mortar shape. The communicating passage 60 is formed by a through-hole (also referred to in the technical field as a "ventilation filter (Vf)") formed in at least the region of the tipping paper 40 where the cooling section 20 is arranged. In the example shown in FIG. 1 , a plurality of communicating passages 60 are formed in the cooling section 20, and are formed concentrically in the circumferential direction of the cooling section 20. Note that the communicating passages 60 are not limited to being formed around the entire circumference of the cooling section 20, but may be formed in part of the circumferential direction of the cooling section 20. Furthermore, if a plurality of concentric communicating passages 60 are considered to be one communicating passage group, there may be one communicating passage group, or there may be two or more communicating passage groups.

[0032] The presence of the communication passage 60 that connects the outside and inside of the stick 1 allows air to flow from the outside into the inside of the cooling section 20 when the user inhales on the stick 1. This makes it possible to adjust the concentration of the inhaled flavor and aroma components and aerosol. It also facilitates cooling of the steam flowing in from the substrate section 10 and the air inside the cooling section 20. Furthermore, when the substrate section 10 is heated, the steam generated using the aerosol as a condensation nucleus comes into contact with the air from the outside, lowering its temperature and liquefying, thereby facilitating the generation of the aerosol.

[0033] The position of the communicating passage 60 in the centerline direction is preferably a position that allows air to flow in from outside the stick 1, for example, a position within the area that protrudes from the insertion opening 142 when the stick 1 is held in the holding portion 140 of the heating device 100. The communicating passage 60 is provided so that the air inflow rate through the communicating passage 60 is 10% by volume or more and 90% by volume or less when the stick 1 is inhaled at 17.5 ml / sec in an automatic smoking machine. This "air inflow rate" refers to the volumetric rate of air flowing in through the communicating passage 60 when the rate of air inhaled from the second end of the stick 1 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 communicating passages 60 per communicating passage group from a range of 5 to 50, selecting the diameter of the openings of the communicating passages 60 from a range of 0.1 mm to 0.5 mm, or by combining these selections. The air inflow ratio can be measured using a winding quality measuring device (for example, SODIMAX D74 / SODIM manufactured by SAS) by a method in accordance with ISO9512.

[0034] The communicating path 60 is composed of a through hole formed in the tipping paper 40 and a through hole formed in the cooling section 20. The through hole is formed, for example, by a laser. The through hole in the tipping paper 40 is preferably formed directly above the through hole formed in the cooling section 20. When producing such a stick 1, tipping paper 40 with a through hole that overlaps with the through hole in the cooling section 20 may be prepared and wrapped around the stick 1. However, from the viewpoint of ease of production, it is preferable to produce a stick 1 without a communicating path 60 and then drill holes that penetrate both the cooling section 20 and the tipping paper 40 at the same time. Note that the intensity of the laser light irradiated after wrapping the tipping paper 40 around the cooling section 20 may be such that it penetrates the tipping paper 40 but not the cooling section 20. Even in this case, if the cooling section 20 has a plurality of pores and is breathable, the through holes in the tipping paper 40 and the pores in the cooling section 20 form a communicating path 60 that connects the outside of the stick 1 with the inside of the cooling section 20.

[0035] (Cooling section 20) The cooling section 20 is disposed adjacent to the substrate section 10 and the filter section 30. The cooling section 20 has a first sheet 21 rolled into a cylindrical shape so that the cross section is hollow (hollow), and a second sheet 22 provided inside the first sheet 21. The cooling section 20 is a cylindrical member formed into a cylindrical shape. Note that the cooling section 20 is not directly heated by the heating section 121 (see Figure 2) of the heating device 100. In addition, a communicating passage 60 is formed in the cooling section 20.

[0036] The cooling unit 20 is a portion that cools the vapor and / or aerosol generated by heating the substrate 10 and maintains the internal temperature at a temperature higher than 100°C when the stick 1 is in use. In other words, the cooling unit 20 is a portion that cools the vapor and / or aerosol generated by heating the substrate 10 while maintaining the internal temperature at a temperature higher than 100°C when the stick 1 is in use. "When the stick 1 is in use" refers to when the stick 1 is inserted into the heating device 100 and the vapor and / or aerosol generated by heating the substrate 10 is present inside the cooling unit 20. For example, this refers to when the user inserts the stick 1 into the heating device 100, heats it, and inhales the aerosol. Specifically, the cooling unit 20 is a portion that maintains the internal temperature of the lowest temperature portion of the stick 1 at a temperature higher than 100°C when the stick 1 is in use. Alternatively, the cooling unit 20 may be a portion that maintains the internal temperature of the portion of the cooling unit 20 that is farthest from the substrate 10 at a temperature higher than 100°C when the stick 1 is in use. Examples of the internal temperature of the cooling unit 20 include the temperature of the inner wall of the first sheet 21, the temperature of the second sheet 22 itself, and the temperature of the inner wall of the second sheet 22.

[0037] Because the cooling unit 20 is a cylindrical member, the vapor generated by heating the substrate 10 can be cooled by contact with air. The vapor is then cooled by contact with air, generating an aerosol. Furthermore, the cooling unit 20 receives heat from the heated substrate 10 via the heating unit 121 and is passed through by air that has passed through the substrate 10, but is not directly heated by the heating unit 121. Therefore, the internal temperature of the cooling unit 20 tends to be lower the farther it is from the substrate 10 during use of the stick 1. The cooling unit 20 has a double structure consisting of the first sheet 21 and the second sheet 22, which allows for better control of the internal temperature compared to a single-layer structure consisting of only the first sheet 21. Specifically, a decrease in the internal temperature of the cooling unit 20 can be suppressed. Furthermore, maintaining the internal temperature of the cooling unit 20 at a temperature higher than 100°C prevents the vapor and / or aerosol passing through the cooling unit 20 from being overcooled.

[0038] The cross section of the cooling section 20 is substantially circular, and its outer diameter may be varied as appropriate to fit the size of the stick 1, but is preferably approximately the same as the outer diameter of the first filter 31. This "approximately the same" refers to, for example, the difference between the thickness of the first sheet 21 and the second sheet 22 and the thickness of the wrapper paper 12, a difference of within 1 mm from the outer diameter of the flavor source 11, and a difference of within 1 mm from the inner diameter of the wrapper paper 12. If the cross section is not circular, the outer diameter is assumed to be a circle having the same area as the cross section, and the outer diameter of that circle is used. The size of the cooling section 20 in the centerline direction may be varied as appropriate to fit the size of the stick 1, but is typically 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. Furthermore, the size of the cooling section 20 in the centerline direction is typically 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. Setting the size of the cooling section 20 in the centerline direction to be equal to or greater than the above-mentioned lower limit ensures a sufficient cooling effect and produces a good flavor. Furthermore, by making the size of the cooling section 20 in the center line direction equal to or less than the upper limit mentioned above, the length of the flow path through which the aerosol reaches the nozzle can be minimized, and a decrease in the amount of aerosol emitted can be suppressed.

[0039] The cooling unit 20 is preferably a member having adequate heat retention properties in order to cool the vapor and / or aerosol while maintaining its internal temperature above 100°C. The materials of the first sheet 21 and the second sheet 22 are not particularly limited as long as they can achieve adequate thermal conductivity. The materials of the first sheet 21 and the second sheet 22 may be, for example, primarily pulp, or may be primarily composed of any of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, aluminum, copper, and carbon fiber, or any combination thereof. Furthermore, in order to maintain the internal temperature above 100°C, the cooling unit 20 preferably includes at least one of aluminum-laminated paper, copper foil, and carbon paper. In order to improve heat retention efficiency, the second sheet 22 is preferably aluminum-laminated paper, copper foil, or carbon paper. Note that "aluminum-laminated paper" refers to a sheet-like material in which aluminum foil and paper are laminated together.

[0040] As described above, the stick 1 is a non-combustion heating type flavor inhalation stick that is heated by the heating device 100 and used, and includes a substrate 10 containing a flavor source 11, and a cooling section 20 that cools the vapor and / or aerosol generated when the substrate 10 is heated during use. The cooling section 20 has a first sheet 21 that is wound into a cylindrical shape so that the cross section is hollow (hollow), and a second sheet 22 that is provided inside the first sheet 21. Because the cooling section 20 is a cylindrical member with a double structure made up of the first sheet 21 and the second sheet 22, it is possible to cool the vapor and / or aerosol and maintain the internal temperature at a temperature higher than 100°C during use of the stick 1.

[0041] The above configuration is based on the discovery, as a result of intensive research by the present inventors, that the temperature of the vapor or aerosol affects the filtration rate within the stick 1 of components generated by heating the substrate portion 10. In other words, the above configuration is based on the discovery, as a result of intensive research by the present inventors, that controlling the internal temperature of the cooling portion 20 enables selective filtration of components generated by heating the substrate portion 10. Specifically, the configuration is based on the discovery that maintaining the internal temperature of the cooling portion 20 at a temperature higher than 100°C can suppress filtration of components that improve the flavor and aroma (e.g., nicotine).

[0042] Here, examples and comparative examples of the stick 1 according to the first embodiment will be described. Fig. 3 shows examples and comparative examples of the flavor inhalation stick 1 according to the first embodiment, with (A) showing a stick 1A according to the example and (B) showing a stick 1B according to a first comparative example. Fig. 4 shows other comparative examples of the flavor inhalation stick 1 according to the first embodiment, with (A) showing a stick 1C according to a second comparative example and (B) showing a stick 1D according to a third comparative example. The configuration of the stick 1A according to the example of the stick 1 according to the first embodiment and the configurations of the sticks 1B to 1D according to the first to third comparative examples will be described. In Figs. 3 and 4, with respect to the stick 1 according to the first embodiment, the portions corresponding to the substrate 10 are designated as substrate portions 10A to 10D, the portions corresponding to the cooling portion 20 are designated as cooling portions 20A to 20D, the portions corresponding to the filter portion 30 are designated as filter portions 30A to 30D, the members corresponding to the tipping paper 40 are designated as tipping paper 40A to 40D, and the openings corresponding to the communicating passages 60 are designated as communicating passages 60A to 60D.

[0043] <<Example>> As shown in FIG. 3(A), the stick 1A according to the example has the same configuration as the stick 1 (see FIG. 1). The size of the stick 1A in the center line direction is 60 mm. The size of the substrate portion 10A, cooling portion 20A, and filter portion 30A in the center line direction is each 20 mm. The size of the tipping paper 40A in the center line direction is 45 mm. The tipping paper 40A is wrapped around the outer peripheral surfaces of the substrate portion 10A, cooling portion 20A, and filter portion 30A from a position 5 mm in the first side (upstream side) direction from the boundary between the substrate portion 10A and the cooling portion 20A to the end of the second side (downstream side) of the filter portion 30A. The position of the communicating passage 60A in the center line direction is on the second side (downstream side) of the center of the cooling portion 20A. The communicating passage 60A is formed at a location 5 mm in the first side (upstream side) direction from the boundary between the cooling portion 20A and the filter portion 30A. The substrate 10A includes a tobacco-derived flavor source 11A, the outer periphery of which is covered with cigarette paper 12A. Heating the substrate 10A not only produces components such as nicotine that enhance the flavor and aroma of the smoke, but also produces components that, although slight, have an undesirable effect on the flavor and aroma of the smoke. Examples of components that have an undesirable effect on the flavor and aroma include tobacco-specific nitrosamines (TSNAs), which are produced when nicotine, an alkaloid found in tobacco leaves, reacts with nitrous acid or nitric acid. Representative examples of TSNAs include N'-nitrosonornicotine (NNN) and 4-(N-nitrosomethylamino)-1-(3-pyridyl)-1-butanone (NNK). The cooling section 20A is a cylindrical member with a double structure consisting of a first sheet 21A made of paper and a second sheet 22A made of aluminum-laminated paper. The inner wall of the cooling section 20A is the paper surface of the second sheet 22A. The filter unit 30A is a dual filter consisting of a first filter 31A, which is a center-hole filter, and a solid second filter 32A, which are connected by a wrapping paper 33A. The sizes of the first filter 31A and the second filter 32A in the center line direction are 8 mm and 12 mm, respectively.

[0044] <<First Comparative Example>> As shown in Fig. 3(B), the stick 1B according to the first comparative example is a flavor inhalation stick similar to the stick 1A according to the example, except that the cooling part 20B does not have a double structure. The cooling part 20B of the stick 1B is a cylindrical member with a single structure wrapped with a paper sheet 21B so that the cross section is hollow (hollow). The inner wall of the cooling part 20B is made of paper.

[0045] 4(A), the stick 1C according to the second comparative example is a flavor inhalation stick similar to the stick 1A according to the example, except that the position of the communicating passage 60C in the center line direction is on the first side (upstream side) relative to the center of the cooling section 20C. In the stick 1C, the communicating passage 60C is not formed at a position 5 mm toward the first side from the boundary between the cooling section 20C and the filter section 30C.

[0046] 4(B) , the stick 1D according to the third comparative example is a flavor inhalation stick similar to the stick 1A according to the example, except that the first filter 31D is a solid filter and the second filter 32D is a center-hole filter. In the filter section 30D of the stick 1D, the first filter 31D having a solid cross section is connected to the second side of the cooling section 20D, and the second filter 32D having a hollow cross section is located on the second side of the first filter 31D.

[0047] FIG. 5 shows the comparison results of the internal temperature when the cooling unit 20 has a different configuration. Specifically, FIG. 5 shows the results of measuring the internal temperature of the cooling unit 20A according to the example and the internal temperature of the cooling unit 20B according to the first comparative example. The horizontal axis of FIG. 5 indicates the distance from the substrate 10A, 10B, with "0" representing the boundary between the substrate 10A, 10B and the cooling unit 20A, 20B, and "20" representing the boundary between the cooling unit 20A, 20B and the filter 30A, 30B. The vertical axis of FIG. 5 also shows the internal temperature of the cooling unit 20A, 20B at each distance from the substrate 10A, 10B. Thermocouples were attached to the cooling units 20A, 20B so that the temperature at a predetermined location could be measured during use of the stick 1A, 1B. For example, thermocouples were attached to the inner walls of the cooling units 20A, 20B. The sticks 1A and 1B, each equipped with a thermocouple in the cooling section 20A or 20B, were inserted into the heating device 100, and the substrate sections 10A and 10B were heated. Specifically, the heating device 100 heated the substrate sections 10A and 10B under heating conditions in which the temperature of the heating section 121 was raised from an unheated state to 290°C in 30 seconds and then maintained constant for 5 minutes. The sticks 1A and 1B were then inhaled, and the maximum temperature at each measurement point during inhalation was taken as the internal temperature of the cooling sections 20A and 20B. For example, the sticks 1A and 1B were inhaled at a flow rate of 55 cc / 2 seconds using a Borgwald single-stick automatic smoking machine. The measurements were performed with the connecting passages 60A and 60B open.

[0048] Stick 1A and stick 1B differ in that cooling section 20A is composed of a first paper sheet 21A and a second aluminum-laminated paper sheet 22A, while cooling section 20B is composed of a paper sheet 21B. However, both cooling sections 20A and 20B are hollow. Because substrate sections 10A and 10B, which are heated by heating device 100, are located on the first side (upstream) of cooling sections 20A and 20B, the internal temperatures of cooling sections 20A and 20B decrease the further away from substrate section 10A and 20B they are. In other words, the internal temperatures of cooling sections 20A and 20B decrease from the first side (upstream) to the second side (downstream). In stick 1B, cooling section 20B is composed only of paper sheet 21B, so the internal temperature of cooling section 20B decreases to 100°C or below. In contrast, stick 1A has second sheet 22A of aluminum-laminated paper, and therefore the decrease in internal temperature is suppressed more than in stick 1B by the insulation provided by second sheet 22A. Specifically, cooling section 20A is composed of first sheet 21A of paper and second sheet 22A of aluminum-laminated paper, and therefore the internal temperature on the second side (downstream side) of cooling section 20A is maintained at a temperature higher than the exponential approximation curve of stick 1B.

[0049] Furthermore, in the stick 1C according to the second comparative example, it is difficult to maintain the internal temperature of the cooling section 20C at a temperature higher than 100°C. The difference between the stick 1A and the stick 1C is that the communication passage 60A is formed on the second side (downstream side) of the cooling section 20A, while the communication passage 60C is formed on the first side (upstream side) of the cooling section 20C. However, the cooling sections 20A and 20C are identical in that they have a double structure including aluminum laminated paper. Although the internal temperature of the cooling section 20C for each distance from the substrate 10C is not shown, the internal temperature is lower than that of the stick 1A. Because the communication passage 60C is formed on the first side (upstream side) of the cooling section 20C, external air flows into the first side (upstream side) of the cooling section 20C, promoting cooling of the internal air more rapidly than in the cooling section 20A. As a result, it is difficult to maintain the internal temperature higher than 100°C even on the second side (downstream side) of the cooling section 20C.

[0050] Here, the relationship between the filtration rate of components generated by heating the substrate 10 and the internal temperature of the cooling unit 20 will be described. After inserting the stick 1 into the heating device 100 and conducting a smoking test, the adsorption and release amounts of various components generated by heating the substrate 10 are measured, and the filtration rates of the various components are calculated from the measurement results. Specifically, the adsorption and release amounts of nicotine, NNN, and NNK are measured as components generated by heating the substrate 10, and the filtration rates of each component are calculated. The smoking test conditions for examining the relationship between the internal temperature of the cooling unit 20 and the filtration rates of the various components are as follows: The heating device 100 raises the temperature of the heating unit 121 from an unheated state to a target temperature in 30 seconds, and then maintains the target temperature for 5 minutes. Subsequently, automatic smoking is performed using a Borgwald single-puff automatic smoking machine under conditions of a flow rate of 55 cc / 2 seconds and a smoking interval of 30 seconds. The smoking test is conducted with the communication channel 60 open. The aerosol that has passed through the filter portion 30 is collected on a Cambridge pad, and after eight puffing operations, the Cambridge pad is removed.

[0051] The adsorption and release amounts of nicotine are measured by the following method. The measurement object is subjected to a fractional extraction method using hexane, ethyl acetate, ethanol, and methanol, thereby extracting the adsorbed nicotine. Then, the amount of nicotine contained in the extract is measured using gas chromatography. This measured value is the adsorption or release amount of nicotine. The adsorption and release amounts of NNN and NNK are measured by the following method. The measurement object is added to a 0.1 M (mol / L) aqueous ammonium acetate solution, and stirring extraction (180 rpm, 60 min) is performed. Then, the extract is filtered through a glass fiber filter, and the amounts of NNN and NNK contained in the obtained filtrate are measured using ion chromatography. This measured value is the adsorption or release amount of NNN and the adsorption or release amount of NNK. Note that an aqueous acetic acid solution and an acetic acid methanol solution can be used as the mobile phase.

[0052] The adsorption amounts of various components are measured by dividing them into an amount P1 adsorbed in a 5 mm-wide region in the centerline direction of the cooling section 20 where the average internal temperature of the cooling section 20 corresponds to each temperature, and an amount M adsorbed in the remaining region of the cooling section 20 and the filter section 30. The amount M adsorbed in the remaining region of the cooling section 20 and the filter section 30 may be measured by dividing it into an amount P2 adsorbed in the remaining region of the cooling section 20 and an amount F adsorbed in the filter section 30. Furthermore, the amount F adsorbed in the filter section 30 may be measured by dividing it into an amount F1 adsorbed in the first filter 31 and an amount F2 adsorbed in the second filter 32. Furthermore, the release amounts of various components are the amounts of various components released from the stick 1 through the filter section 30, and the amount V of various components adhering to the Cambridge pad after the smoking test is measured. The filtration rate based on internal temperature is calculated using formula (1).

[0053] (Equation 1) Filtration rate (%) according to internal temperature = P1 / (P1+M+V) x 100 = P1 / (P1+P2+F+V) x 100 = P1 / (P1+P2+F1+F2+V) x 100

[0054] FIG. 6 shows the relationship between the internal temperature and the filtration rate of various components, where (A) shows the filtration rate of nicotine, (B) shows the filtration rate of NNN, and (C) shows the filtration rate of NNK. FIG. 6 shows the filtration rates of nicotine, NNN, and NNK for each internal temperature of the cooling section 20B according to the first comparative example. In FIG. 6, the horizontal axis represents the internal temperature of the cooling section 20B, and the vertical axis represents the filtration rates of various components. The inner wall surface of the cooling section 20B according to the first comparative example is made of the same paper as the inner wall surface of the cooling section 20A according to the example. The conditions to which the vapor and aerosol passing through the cooling section 20B are exposed differ only in temperature from the conditions to which the vapor and aerosol passing through the cooling section 20A are exposed. Therefore, the relationship between the internal temperature of the cooling section 20B and the filtration rate of various components shown in FIG. 6 is similar to the relationship between the internal temperature of the cooling section 20A according to the example and the filtration rate of various components.

[0055] The nicotine filtration rate shown in Figure 6 (A) was calculated based on the amount of nicotine adsorbed and released measured according to the following method. After the smoking test, a 5 mm wide area in the centerline direction was cut out from the cooling section 20B, where the average internal temperature corresponded to each temperature. The cut-out area was subjected to the same fraction extraction method as above, and the amount of nicotine contained in the extract was measured using gas chromatography. In addition, the remaining area of ​​the cooling section 20B, the first filter 31B, the second filter 32B, and the Cambridge pad after the smoking test were each subjected to the same fraction extraction method as above, and the amount of nicotine contained in each extract was measured using gas chromatography. The measured amounts of nicotine adsorbed and released were then substituted into Formula (1), and the nicotine filtration rate was calculated for each temperature corresponding to the average internal temperature of the cut-out area.

[0056] From the results shown in FIG. 6(A), when the internal temperature of the cooling unit 20B is below approximately 100°C, the nicotine filtration rate tends to increase as the temperature increases. However, when the internal temperature of the cooling unit 20B is higher than approximately 100°C, the nicotine filtration rate decreases as the temperature increases. Specifically, when the internal temperature of the cooling unit 20B is higher than approximately 100°C, the rate at which nicotine generated by heating the substrate unit 10B is adsorbed within the cooling unit 20 is reduced. In other words, from the perspective of improving the delivery efficiency of nicotine generated by heating the substrate unit 10B, it is preferable to maintain the internal temperature of the cooling unit 20B at a temperature higher than 100°C. Note that when the internal temperature of the cooling unit 20B is above approximately 150°C, the decrease in the nicotine filtration rate is more gradual than when the internal temperature of the cooling unit 20B is between 100°C and approximately 150°C.

[0057] The filtration rates of NNN shown in FIG. 6(B) and NNK shown in FIG. 6(C) were calculated based on the adsorption and release amounts measured according to the following method. After the smoking test, a 5 mm-wide area in the centerline direction was cut out from the cooling unit 20B, where the average internal temperature corresponded to each temperature. The cut-out area was stirred and extracted in the same manner as above, and the amounts of NNN and NNK contained in each extract were measured using ion chromatography. The remaining area of ​​the cooling unit 20B, the first filter 31B, the second filter 32B, and the Cambridge pad after the smoking test were each stirred and extracted in the same manner as above, and the amounts of NNN and NNK contained in the extract were measured using ion chromatography. The measured adsorption and release amounts of NNN and NNK were then substituted into Equation (1), and the filtration rates of NNN and NNK were calculated for each temperature corresponding to the average internal temperature of the cut-out area.

[0058] From the results shown in Figures 6(B) and 6(C), when the internal temperature of the cooling section 20B was approximately 100°C, the filtration rates of NNN and NNK exceeded 10%. Furthermore, the filtration rates of NNN and NNK tended to increase as the internal temperature of the cooling section 20B increased when the internal temperature was approximately 150°C or lower. The filtration rates of NNN and NNK were maximized when the internal temperature of the cooling section 20B was approximately 150°C. In other words, from the perspective of promoting TSNA filtration while suppressing nicotine filtration, it is preferable that the internal temperature of the cooling section 20B be higher than 100°C. However, when the internal temperature of the cooling section 20B was too high, the filtration rates of NNN and NNK tended to decrease. Specifically, the filtration rate of NNN was below 10% when the internal temperature of the cooling section 20B was approximately 200°C, but was below 5% when the internal temperature of the cooling section 20B was approximately 250°C. Furthermore, the filtration rate of NNK was below 15% when the internal temperature of cooling section 20B was about 200°C, but below 5% when the internal temperature of cooling section 20B was about 250°C. Therefore, it is more preferable that the internal temperature of cooling section 20B be higher than 100°C and not higher than 200°C at the lowest temperature point within cooling section 20B. The lowest temperature point within cooling section 20B is, for example, the point within cooling section 20B that is furthest from substrate section 10B.

[0059] Next, the relationship between the configuration of the stick 1 and the delivery of various components will be described. The conditions for the smoking test when examining the effect of the configuration of the stick 1 on the delivery of various components are as follows. Similar to the heating conditions in Figure 5, the heating device 100 raises the temperature of the heating section 121 from an unheated state to 290°C in 30 seconds, and then maintains it at 290°C for 5 minutes. After this, automatic smoking is performed using a Borgwald single-puff automatic smoking machine under conditions of a flow rate of 55 cc / 2 seconds and a smoking interval of 30 seconds. The smoking test is performed with the communication channel 60 open. The aerosol that passes through the filter section 30 is collected on a Cambridge pad, and after eight puffs, the Cambridge pad is removed.

[0060] The methods for measuring the adsorption and release amounts of nicotine, and the adsorption and release amounts of NNN and NNK are the same as those described above. The adsorption amounts of various components are measured separately as the amount P adsorbed by the cooling unit 20 and the amount F adsorbed by the filter unit 30. The amount F adsorbed by the filter unit 30 is the sum of the amount F1 adsorbed by the first filter 31 and the amount F2 adsorbed by the second filter 32. The filtration rate by the cooling unit 20 is calculated using formula (2).

[0061] (Equation 2) Filtration rate by cooling section (%) = P / (P+F+V) x 100 = P / (P+F1+F2+V) x 100

[0062] 7A and 7B are diagrams showing the comparison results of nicotine delivery when the configuration of the cooling unit 20 is changed, with (A) showing the nicotine filtration rate and (B) showing the nicotine release amount. Fig. 7A shows the nicotine filtration rate by the cooling unit 20A of the stick 1A according to the example (hereinafter referred to as "by the cooling unit 20A") and the nicotine filtration rate by the cooling unit 20B of the stick 1B according to the first comparative example (hereinafter referred to as "by the cooling unit 20B"). Fig. 7B also shows the nicotine release amount by the stick 1A according to the example and the nicotine release amount by the stick 1B according to the first comparative example.

[0063] The nicotine filtration rates by the cooling sections 20A and 20B shown in Figure 7 (A) were calculated by subjecting each test subject to the same fraction extraction method as above after the smoking test, measuring the amount of nicotine contained in the extract using gas chromatography, and substituting the measured value into Equation (2). As shown in Figure 5, stick 1A and stick 1B differ in that the internal temperature of cooling section 20A is maintained at a temperature higher than 100°C, while the internal temperature of cooling section 20B is 100°C or lower, but both cooling sections 20A and 20B have paper inner wall surfaces. Since nicotine filtration is suppressed even in cooling section 20A when its internal temperature is higher than approximately 100°C, the nicotine filtration rate by cooling section 20A, whose internal temperature is maintained at a temperature higher than 100°C, is slightly lower than the nicotine filtration rate by cooling section 20B, whose internal temperature is 100°C or lower.

[0064] The amounts of nicotine released by sticks 1A and 1B shown in Figure 7(B) are the amounts adhering to the Cambridge pads after the smoking test. As shown in Figure 7(A), sticks 1A and 1B have different nicotine filtration rates between cooling parts 20A and 20B. Because the nicotine filtration rate by cooling part 20A is slightly lower than that by cooling part 20B, the nicotine release amount by stick 1A is slightly greater than that by stick 1B.

[0065] 8A and 8B are diagrams showing the results of a comparison of the filtration rates of TSNA when the configuration of the cooling unit 20 is changed, with (A) showing the filtration rate of NNN and (B) showing the filtration rate of NNK. Fig. 8A shows the filtration rate of NNN by the cooling unit 20A of the stick 1A according to the example and the filtration rate of NNN by the cooling unit 20B of the stick 1B according to the first comparative example. Fig. 8B also shows the filtration rate of NNK by the cooling unit 20A according to the example and the filtration rate of NNK by the cooling unit 20B according to the first comparative example.

[0066] The NNN filtration rate by the cooling units 20A and 20B shown in Figure 8 (A) was calculated by stirring and extracting each measurement object in the same manner as above after the smoking test, and measuring the amount of NNN contained in each extract using ion chromatography, and substituting the value into formula (2). The NNK filtration rate by the cooling units 20A and 20B shown in Figure 8 (B) was calculated in the same manner as the NNN filtration rate by the cooling units 20A and 20B. As shown in Figure 5, the stick 1A and stick 1B differ in that the internal temperature of the cooling unit 20A at a location 14 mm away from the substrate 10A is maintained at about 150 ° C, while the internal temperature of the cooling unit 20B is below 150 ° C on the first side (upstream side) of the cooling unit 20B. When the internal temperature of the cooling part 20 is around 150°C, the filtration of NNN and NNK is promoted, and therefore the cooling part 20A, whose internal temperature is maintained at a temperature higher than 150°C over a wide range, has a higher filtration rate of NNN and NNK than the cooling part 20B. The stick 1A having the cooling part 20A promotes the filtration of NNN and NNK while suppressing the filtration of nicotine. In other words, the cooling part 20A of the stick 1A selectively filters various components produced by heating the base part 10A.

[0067] 9A and 9B are diagrams showing the results of a comparison of the amount of TSNA released when the configuration of the flavor inhalation stick 1 is changed, with (A) showing the amount of NNN released and (B) showing the amount of NNK released. Fig. 9A shows the amount of NNN released from the stick 1A according to the example, the amount of NNN released from the stick 1B according to the first comparative example, and the amount of NNN released from the stick 1D according to the third comparative example. Fig. 9B also shows the amount of NNK released from the stick 1A according to the example, the amount of NNK released from the stick 1B according to the first comparative example, and the amount of NNK released from the stick 1D according to the third comparative example. The amounts of NNN and NNK released from the sticks 1A, 1B, and 1D are the amounts adhering to the Cambridge pad after the smoking test.

[0068] As shown in Figures 8(A) and 8(B), the filtration rates of NNN and NNK differ between the cooling units 20A and 20B of stick 1A and stick 1B. Because the filtration rates of NNN and NNK by cooling unit 20A are higher than the filtration rates of NNN and NNK by cooling unit 20B, the amount of NNN and NNK released by stick 1A is less than the amount of NNN and NNK released by stick 1B, as shown in Figures 9(A) and 9(B). The amount of TSNA released by stick 1A is reduced by about 25 to 30% compared to stick 1B.

[0069] The difference between stick 1A and stick 1D is that the first filter 31A located on the first side (upstream side) of filter unit 30A has a hollow portion, while the first filter 31D located on the first side (upstream side) of filter unit 30D is solid. On the other hand, stick 1A and stick 1D are identical in that the filter units 30A, 30D are composed of a hollow filter and a solid filter. Stick 1A and stick 1D are also identical in that the cooling units 20A, 20D are tubular members with a double structure of paper and aluminum-laminated paper. In stick 1D, the first filter 31D, which has a solid cross section, is adjacent to the second side (downstream side) of cooling unit 20D. In contrast, in stick 1A, the cross section of the first filter 31A adjacent to cooling unit 20A is hollow, so cooling unit 20A dissipates heat more easily than cooling unit 20D. Therefore, the internal temperature of cooling unit 20D may become higher than the internal temperature of cooling unit 20A, and the filtration rate of TSNA (e.g., NNN, NNK) by cooling unit 20D may become lower than the filtration rate of TSNA by cooling unit 20A.

[0070] 9(A) and (B), the amount of NNN and NNK emitted by stick 1A, in which the aerosol passes through hollow first filter 31A and then solid second filter 32A, is smaller than the amount of NNN and NNK emitted by stick 1D, in which the aerosol passes directly through solid first filter 31D. Thus, although stick 1D has the same configuration of cooling section 20D as cooling section 20A, the filtration rate of TSNA (e.g., NNN, NNK) is lower, and the amount of TSNA emitted is greater than that of stick 1A.

[0071] As described above, the stick 1 is a non-combustion heating type flavor inhalation stick that is heated by the heating device 100 before use, and includes a base portion 10 containing a flavor source 11, and a cooling portion 20 that, during use, cools the vapor and / or aerosol generated by heating the base portion 10 and maintains the internal temperature at a temperature higher than 100°C.

[0072] The stick 1 is inserted into the holding portion 140 of the heating device 100. After the temperature of the substrate portion 10 heated by the heating portion 121 reaches a predetermined temperature, the user inhales and generates an aerosol. When the user inhales, the vapor and aerosol are cooled in the cooling portion 20. Cooling in the cooling portion 20 means cooling the vapor to a level at which the vapor is liquefied and an aerosol is generated, and cooling the aerosol so that the aerosol delivered to the mouth has an appropriate temperature. Furthermore, maintaining the internal temperature of the cooling portion 20 at a temperature higher than 100°C suppresses the filtration of nicotine, a component that improves the flavor and taste. The stick 1 can selectively suppress the filtration of components generated by heating. In other words, the stick 1 can selectively filter out components generated by heating.

[0073] The cooling unit 20 preferably maintains the internal temperature during use at a temperature higher than 100°C and lower than 200°C at the lowest temperature point within the cooling unit 20. When the internal temperature of the cooling unit 20 was approximately 150°C, the filtration rates of NNN and NNK were maximized. By maintaining the internal temperature of the cooling unit 20 at a temperature higher than 100°C and lower than 200°C, it is possible to promote the filtration of TSNA while suppressing the filtration of nicotine.

[0074] The cooling unit 20 preferably maintains the internal temperature during use at a temperature higher than 100°C and lower than 200°C at the location within the cooling unit 20 farthest from the substrate 10. Because the cooling unit 20 is not directly heated by the heating unit 121 of the heating device 100, the internal temperature tends to be lower the further away from the substrate 10 the cooling unit 20 is during use of the stick 1. By maintaining the internal temperature higher than 100°C and lower than 200°C even at the location within the cooling unit 20 farthest from the substrate 10, it is possible to promote the filtration of TSNA while suppressing the filtration of nicotine.

[0075] When the cooling unit 20 is configured as a cylindrical member, the internal temperature may be the temperature of the inner wall of the cylindrical member. Of the vapor and aerosol passing through the cooling unit 20, the vapor and aerosol passing through the region closer to the outer circumferential surface in the cross section of the cooling unit 20 tend to dissipate heat more and have lower temperatures. The lowest temperature of the vapor and aerosol passing through the cooling unit 20 is approximately the same as the temperature of the inner wall of the cylindrical member. Therefore, by maintaining the temperature of the inner wall of the cylindrical member at a temperature higher than 100°C, the vapor and aerosol passing through the cooling unit 20 can be maintained at a temperature higher than 100°C.

[0076] The cooling unit 20 preferably includes at least one of aluminum-laminated paper, copper foil, and carbon paper. By using the above materials, the cooling unit 20 can easily maintain the internal temperature at a temperature higher than 100°C while cooling the vapor and / or aerosol passing through the cooling unit 20.

[0077] It is preferable that a communication passage 60 communicating the outside and the inside be formed downstream of the center of the cooling section 20 in the longitudinal direction of the cooling section 20 in the region where the cooling section 20 is arranged. If the cooling section 20 does not have a communication passage 60, air does not flow from the outside into the cooling section 20 during suction, and there is a risk that the steam or aerosol flowing in from the substrate section 10 will not be sufficiently cooled. In this embodiment, the presence of the communication passage 60 for the flow of outside air can promote the cooling of the steam or aerosol. If the communication passage 60 is located upstream of the center of the cooling section 20 in the longitudinal direction, cooling is promoted on the first side (upstream side) within the cooling section 20, and it is difficult to maintain the internal temperature at a temperature higher than 100°C even on the second side (downstream side). In this embodiment, the presence of the communication passage 60 downstream of the center of the cooling section 20 in the longitudinal direction allows the internal temperature to be maintained at a temperature higher than 100°C.

[0078] The filter unit 30 preferably includes a first filter 31 having a hollow portion and adjacent to the downstream side of the cooling unit 20, and a solid second filter 32 adjacent to the downstream side of the first filter 31. Compared to when the filter unit 30 is entirely hollow, the temperature of the aerosol inhaled by the user can be lowered. Also, compared to when the filter unit 30 is entirely solid, the amount of components (e.g., nicotine) released upon heating can be maintained. Also, compared to when a solid filter is adjacent to the downstream side of the cooling unit 20 and a filter having a hollow portion is adjacent to the solid filter downstream, the amount of TSNA (e.g., NNN, NNK) released can be reduced.

[0079] It should be noted that the stick 1 is not limited to a configuration including tipping paper 40 wrapped around the entire outer circumferential surface of the cooling section 20. For example, the stick 1 may include two pieces of tipping paper 40 wrapped around the outer circumferential surface of the boundary between the substrate section 10 and the cooling section 20, and the outer circumferential surface of the boundary between the cooling section 20 and the filter section 30, separately.

[0080] <Second embodiment> Fig. 10 is a diagram showing a longitudinal section of a flavor inhalation stick 2 according to a 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 cooling section 220 corresponding to the cooling section 20. Differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and second embodiments, and detailed descriptions thereof will be omitted.

[0081] The cooling section 220 differs from the cooling section 20 according to the first embodiment (see FIG. 1 ) in that the second sheet 222 is provided only on a portion of the inside of the first sheet 221. The cooling section 220 has the first sheet 221 rolled into a cylindrical shape so that the cross section is hollow (hollow), and the second sheet 222 provided on the inside of the first sheet 221. The second sheet 222 is provided on the second side (downstream side) of the cooling section 220, inside the first sheet 221. The materials constituting the first sheet 221 and the second sheet 222 may be the same as the materials constituting the first sheet 21 and the second sheet 22 according to the first embodiment, respectively.

[0082] When the stick 2 is in use, the internal temperature of the cooling unit 220 tends to be lower the farther it is from the substrate 10. In other words, when the stick 2 is in use, the internal temperature of the cooling unit 220 tends to be lower on the second side (downstream side). In the case of this embodiment, the second side (downstream side) of the cooling unit 220 has a double structure, which makes it possible to suppress a decrease in the internal temperature of the cooling unit 220. By suppressing a decrease in the internal temperature of the cooling unit 220, it is possible to cool the vapor and / or aerosol generated by heating the substrate 10 when the stick 2 is in use, and to maintain the internal temperature at a temperature higher than 100°C.

[0083] As described above, the stick 2 is a non-combustion heating type flavor inhalation stick that is heated by the heating device 100 before use, and includes the base 10 containing the flavor source 11, and the cooling section 220 that, during use, cools the vapor and / or aerosol generated by heating the base 10 and maintains the internal temperature at a temperature higher than 100° C. Like the stick 1, the stick 2 can selectively filter out components generated by heating.

[0084] <Third embodiment> Fig. 11 is a view showing a longitudinal section of a flavor inhalation stick 3 according to a 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 cooling section 320 corresponding to the cooling section 20. Differences from the first embodiment will be described below. The same reference numerals are used for the same components in the first and third embodiments, and detailed descriptions thereof will be omitted.

[0085] The cooling unit 320 differs from the cooling unit 20 according to the first embodiment (see FIG. 1 ) in that it has a single-layer structure. The cooling unit 320 has a sheet 321 rolled into a cylindrical shape so that the cross section is hollow (hollow). The cooling unit 320 is a part that cools the vapor and / or aerosol generated by heating the substrate 10 when the stick 3 is in use, and maintains the internal temperature at a temperature higher than 100°C. In other words, the cooling unit 320 is a part that cools the vapor and / or aerosol generated by heating the substrate 10 while maintaining the internal temperature at a temperature higher than 100°C when the stick 3 is in use.

[0086] The material of the sheet 321 is not particularly limited as long as it can maintain the internal temperature at a temperature higher than 100° C. Furthermore, when the material of the sheet 321 is the same as the material of the first sheet 21 and the second sheet 22 according to the first embodiment, the internal temperature may be maintained at a temperature higher than 100° C. by adjusting the thickness of the sheet 321. Note that the cooling unit 320 is not limited to being formed by rolling the sheet 321, but may also be formed, for example, by a tube.

[0087] As described above, the stick 3 is a non-combustion heating type flavor inhalation stick that is heated by the heating device 100 and used, and includes the base 10 containing the flavor source 11, and the cooling section 320 that, during use, cools the vapor and / or aerosol generated by heating the base 10 and maintains the internal temperature at a temperature higher than 100° C. Like the stick 1, the stick 3 can selectively filter out components generated by heating.

[0088] <Modifications> (1) Although the embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the scope described in the above-described embodiments. It is clear from the claims that various modifications or improvements to the above-described embodiments are also included in the technical scope of the present disclosure.

[0089] (2) At least the downstream side of the outer periphery of the flavor source contained in the base material may be covered with at least one of aluminum-laminated paper, copper foil, and carbon paper. By covering at least the downstream region of the base material with a heat-retaining material, the temperature of the steam and / or aerosol may be increased when it flows into the cooling section. By increasing the temperature of the steam and / or aerosol when it flows into the cooling section, it becomes easier to maintain the internal temperature of the cooling section at a temperature higher than 100°C.

[0090] (3) The cooling section does not have to be formed by a cylindrical member. Here, it is assumed that the flavor inhalation stick includes a substrate, a cooling section, a filter section through which the aerosol passes, and an exterior member covering the outer surfaces of the substrate and the filter. In this case, the cooling section may be a space surrounded by the downstream surface of the substrate, the upstream surface of the filter, and the exterior member. The exterior member is not particularly limited as long as it is capable of cooling the vapor and / or aerosol generated by heating the substrate in the cooling section and maintaining the internal temperature at a temperature higher than 100°C. For example, the exterior member may be formed by at least aluminum-laminated paper, copper foil, or carbon paper. When the cooling section is formed by a cylindrical member, its volume is smaller than the space formed by the exterior member between the substrate and the filter. By maximizing the cross-sectional diameter of the cooling section through which the vapor and aerosol pass, it is possible to prevent the cooling section from reducing the release amount of components (e.g., nicotine) generated by heating.

[0091] (4) The flavor inhalation stick is a non-combustion heating type flavor inhalation stick that is inserted into a heating device for use, and may include a base portion having a flavor source and a heating element for heating the flavor source, and a cooling element that, during use, cools the vapor and / or aerosol generated by heating the base portion and maintains an internal temperature above 100°C. When the heating device generates a fluctuating electromagnetic field, eddy currents are generated in the heating element located within the fluctuating electromagnetic field, resulting in heating of the heating element. The heated heating element heats the flavor source. By maintaining the internal temperature of the portion that cools the vapor and / or aerosol generated by heating the base portion at a temperature above 100°C, components generated by heating the base portion from the inside can be selectively filtered.

[0092] <Summary> The present disclosure includes the following configurations. (1) A non-combustion heating type flavor inhalation stick that is heated by a heating device and used, the flavor inhalation stick comprising: a base portion containing a flavor source; and a cooling portion that, during use, cools vapor and / or aerosol generated by heating the base portion and maintains an internal temperature above 100°C. (2) The flavor inhalation stick described in (1), in which the cooling portion maintains the internal temperature during use at a temperature above 100°C and not higher than 200°C at the lowest temperature location within the cooling portion. (3) The flavor inhalation stick described in (1), in which the cooling portion maintains the internal temperature during use at a temperature above 100°C and not higher than 200°C at the location within the cooling portion that is farthest from the base portion. (4) The flavor inhalation stick described in any of (1) to (3), in which, when the cooling portion is formed of a cylindrical member formed in a cylindrical shape, the internal temperature is the temperature of the inner wall of the cylindrical member. (5) The flavor inhalation stick according to any one of (1) to (4), wherein the cooling unit includes at least one of aluminum-laminated paper, copper foil, and carbon paper. (6) The flavor inhalation stick according to any one of (1) to (5), wherein a communication passage connecting the outside and the inside is formed downstream of the center of the cooling unit in the region where the cooling unit is arranged. (7) The flavor inhalation stick according to any one of (1) to (6), comprising a filter unit having a first filter having a hollow portion and adjacent to the downstream side of the cooling unit, and a solid second filter adjacent to the downstream side of the first filter. (8) A flavor inhalation system comprising the flavor inhalation stick according to any one of (1) to (7) and a heating device that heats the flavor inhalation stick.

[0093] DESCRIPTION OF SYMBOLS 1...flavor inhalation stick, 10...base material portion, 11...flavor source, 12...wrapping paper, 20...cooling portion, 21...first sheet, 22...second sheet, 30...filter portion, 31...first filter, 32...second filter, 40...tipping paper, 60...communicating passage, 100...heating device

Claims

1. A non-combustion heating type fragrance attracting stick that is used after being heated by a heating device, comprising a base material part containing a fragrance source, and a cooling part that cools the vapor and / or aerosol generated by heating the base material part during use and maintains the internal temperature at a temperature higher than 100°C. The fragrance attracting stick is provided with a cooling part that maintains the internal temperature at a temperature higher than 100°C and 200°C or lower at the location where the temperature is the lowest in the cooling part during use.

2. The fragrance attracting stick according to claim 1, wherein the cooling part maintains the internal temperature at a temperature higher than 100°C and 200°C or lower at the location farthest from the base material part in the cooling part during use.

3. The fragrance attracting stick according to claim 1, wherein the cooling part maintains the internal temperature at a temperature higher than 100°C and 200°C or lower at the location farthest from the base material part in the cooling part during use.

4. The fragrance attracting stick according to any one of claims 1 to 3, wherein when the cooling part is composed of a cylindrical member formed in a cylindrical shape, the internal temperature is the temperature of the inner wall of the cylindrical member.

5. The fragrance attracting stick according to any one of claims 1 to 4, wherein the cooling part contains at least any one of aluminum laminated paper, copper foil, and carbon paper.

6. The fragrance attracting stick according to any one of claims 1 to 5, wherein a communication passage that communicates the outside and the inside is formed on the downstream side of the central portion in the longitudinal direction of the cooling part in the region where the cooling part is disposed.

7. The fragrance attracting stick according to any one of claims 1 to 6, further comprising a filter part having a first filter having a hollow part and adjacent to the downstream side of the cooling part, and a solid second filter adjacent to the downstream side of the first filter.

8. A fragrance attracting system comprising the fragrance attracting stick according to any one of claims 1 to 7, and a heating device that heats the fragrance attracting stick.

Images