JP2024053115A - Heated tobacco products - Google Patents

Abstract

[Problem] To provide a technology for a heated tobacco product having a tobacco filler material containing tobacco raw materials and an aerosol-generating substrate, and a tobacco rod having a cigarette paper around which the tobacco filler material is wound, and a manufacturing method thereof, which has an excellent aerosol delivery rate and enables a heater to be smoothly inserted into the tobacco filler material.
[Solution] A heated tobacco product comprising a tobacco rod having a tobacco filler and cigarette paper around which the tobacco filler is wound, the tobacco filler having a plurality of tobacco strands which contain an aerosol-generating substrate and tobacco raw material and have a strand shape, the plurality of tobacco strands being aligned and arranged so as to extend along the longitudinal direction of the tobacco rod.
[Selected Figure] Figure 1

Description

The present invention relates to heated tobacco products, methods and devices for manufacturing tobacco rods for heated tobacco products.

Heated tobacco products having a tobacco rod formed by filling the inside of a cigarette paper with a tobacco filler material containing tobacco raw materials (e.g., tobacco shreds, tobacco granules, reconstituted tobacco material, etc.) and an aerosol-generating base material (glycerin, propylene glycol, etc.) are known (see, for example, Patent Document 1). This type of heated tobacco product is a type of tobacco product in which the tobacco filler is heated by a heater in a heating device without being burned, and the aerosol generated in the tobacco filler is delivered to the user. Heaters of various shapes, such as blade-shaped and rod-shaped heaters, have been put into practical use, and when in use, the tobacco rod is attached to the heating device by inserting the heater from the tip surface of the tobacco rod.

Japanese Patent No. 5920744 Patent No. 6000451 Japanese Patent No. 6017546 Japanese Patent Application Laid-Open No. 62-272962

In the tobacco rod of a conventional heated tobacco product, the tobacco raw materials in the tobacco filler are randomly oriented, so that when the heated tobacco product is attached to a heating device, it may be difficult to smoothly insert the heater into the tobacco filler. Furthermore, when a tobacco rod for a heated tobacco product is formed using a tobacco filler in which the tobacco raw materials are randomly oriented, the aerosol generated by the volatilization of the aerosol-generating base material is exposed to the low-temperature portion of the randomly oriented tobacco raw materials and is easily condensed or filtered by the tobacco raw materials, which may reduce the amount of aerosol delivered to the oral cavity.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a technology for a heated tobacco product having a tobacco filler material containing tobacco raw materials and an aerosol-generating substrate, and a tobacco rod having a cigarette paper for winding the tobacco filler material, and a manufacturing method thereof, which has an excellent aerosol delivery amount and allows for smooth insertion of a heater into the tobacco filler material.

To solve the above problems, the present invention employs a structure in which a large number of long tobacco strands, obtained by forming tobacco raw material into strands, are arranged so that they extend along the longitudinal direction of the tobacco rod.

More specifically, the present invention is a manufacturing method for producing a tobacco rod for a heated tobacco product, comprising: a cutting step of continuously cutting a tobacco raw material sheet along a conveying path into a plurality of strand-shaped tobacco strand continuous bodies while conveying the tobacco raw material sheet along the conveying path; a molding step of wrapping the plurality of tobacco strand continuous bodies obtained in the cutting step in cigarette paper while aligning them along the conveying path, thereby forming a rod-shaped tobacco rod continuous body; and a cutting step of sequentially cutting the tobacco rod continuous body obtained in the molding step into individual tobacco rods.

Here, the tobacco raw material sheet may be obtained by forming a tobacco raw material containing an aerosol-generating base material into a sheet shape.

The tobacco raw material sheet may also be wound around a bobbin, and the tobacco raw material sheet continuously unwound from the bobbin may be transported along a transport path.

In the manufacturing method for producing a tobacco rod for a heated tobacco product, the cutting step may involve cutting the tobacco raw material sheet so as to obtain a plurality of continuous tobacco strands, each having a uniform width.

The manufacturing method for producing a tobacco rod for a heated tobacco product may further include a calendaring process for increasing the density of the tobacco raw material sheet by performing a calendaring process on the tobacco raw material sheet, and in the cutting process, the tobacco raw material sheet after the calendaring process may be conveyed along a conveying path while the tobacco raw material sheet is continuously cut along the conveying path into a plurality of continuous tobacco strands.

The manufacturing method for producing a tobacco rod for a heated tobacco product may further include an adding step of adding at least one of a flavoring and an aerosol-generating substrate to the continuous tobacco strands obtained in the cutting step. In this case, the adding step may add at least one of a flavoring and an aerosol-generating substrate to the continuous tobacco strands during the process of wrapping the continuous tobacco strands with the cigarette paper in the forming step.

The present invention also relates to a manufacturing device for manufacturing tobacco rods for heated tobacco, characterized in that it includes: a bobbin on which a tobacco raw material sheet is wound; a cutting section that is disposed on a conveying path of the tobacco raw material sheet continuously unwound from the bobbin and cuts the tobacco raw material sheet into a plurality of continuous strands of tobacco strands along the conveying path; a forming section that is disposed downstream of the cutting section on the conveying path and wraps the plurality of continuous tobacco strands in cigarette paper while aligned along the conveying path to form a rod-shaped continuous tobacco rod; and a cutting section that is disposed downstream of the forming section on the conveying path and cuts the continuous tobacco rod into individual tobacco rods having a predetermined length.

Here, the cutting section may cut the tobacco raw material sheet to obtain a plurality of continuous tobacco strands, each having a constant width.

The cutting section may also have a cutter arranged parallel to the transport path, and the tobacco raw material sheet may be cut continuously into a plurality of continuous tobacco strands by passing the tobacco raw material sheet along the transport path through the cutter.

The present invention also provides a heat-not-burn tobacco comprising a tobacco rod having a tobacco filler and a cigarette paper for winding the tobacco filler, the tobacco filler having a plurality of tobacco strands that contain an aerosol-generating base material and tobacco raw material and have a strand shape, the plurality of tobacco strands being aligned and arranged so as to extend along the longitudinal direction of the tobacco rod.

Here, the tobacco strands may be arranged parallel to each other along the longitudinal direction of the tobacco rod.

The tobacco strand may also be arranged to extend from the front end to the rear end of the tobacco rod.

The tobacco strands may also have a rectangular shape.

The tobacco strand may also have a rectangular cross section perpendicular to its longitudinal axis.

The tobacco strand may also have a cross-sectional width perpendicular to its longitudinal direction of 0.4 mm or more and 3 mm or less.

The tobacco strand may also have a cross-sectional thickness perpendicular to its longitudinal direction of 0.02 mm or more and 1.3 mm or less.

The tobacco strand may also have a length dimension along its longitudinal axis of 10 mm or more and 50 mm or less.

The diameter of the tobacco rod may be 5 mm or more and 8 mm or less.

The tobacco strand may also have a cross-sectional area perpendicular to its longitudinal direction that is equal throughout its entire length.

The content of the aerosol-generating substrate in the tobacco rod may be 10 wt% or more and 25 wt% or less.

The heated tobacco may also have a mouthpiece portion coaxially connected to the base end of the tobacco rod, and the mouthpiece portion may include a cooling portion for cooling the volatile substance released from the aerosol-generating substrate.

The mouthpiece may also include a support portion disposed at a connection end connected to the base end side of the tobacco rod to prevent the tobacco strand from being pushed into the area on the mouthpiece side.

The mouthpiece may also include a filter located at the mouth end of the mouthpiece.

The volumetric filling rate of the tobacco strands occupying the tobacco rod may be 50 vol % or more and 80 vol % or less.

In addition, when the heater of the heating device to which the heated tobacco is applied is an external heating heater, the volumetric filling rate of the tobacco strands occupying the tobacco rod may be 60 vol% or more and 80 vol% or less.

In addition, when the heater of the heating device to which the heated tobacco is applied is an internal heating heater, the volumetric filling rate of the tobacco strands occupying the tobacco rod may be 50 vol.% or more and 75 vol.% or less.

The present invention may also be a heated tobacco product that includes any of the above-mentioned heated tobacco products and a heating device to which the heated tobacco is applied.

In the heated tobacco product according to the present invention, the heating device has a rod accommodating section in which the tobacco rod of the heated tobacco product can be attached, and a heater provided in the rod accommodating section. When the heater is an internal heating heater that is inserted from the tip side of the tobacco rod when the tobacco rod is attached to the rod accommodating section, the volume filling rate of the tobacco strands occupying the tobacco rod when the tobacco rod is attached to the rod accommodating section may be 60 vol% or more and 80 vol% or less.

In addition, in the heated tobacco product according to the present invention, the ratio of the maximum diameter of the heater to the diameter of a cross section perpendicular to the longitudinal direction of the tobacco rod may be 0.3 or more and 0.6 or less.

The means for solving the problems in this invention can be combined as much as possible.

The present invention provides a technology that provides an excellent aerosol delivery amount in a heated tobacco product that includes a tobacco filler material containing tobacco raw materials and an aerosol-generating substrate, and a tobacco rod that includes a cigarette paper for winding the tobacco filler material, while enabling a heater to be smoothly inserted into the tobacco filler material and preventing the tobacco raw materials from being pushed into the tobacco filler material by the heater when the heater is inserted into the tobacco filler material.

FIG. 1 is a diagram illustrating a schematic internal structure of a heated tobacco product according to a first embodiment. FIG. 2 is a perspective view showing an example of a tobacco strand. FIG. 3 is a schematic diagram of a heating device to which a heated tobacco product is applied. FIG. 4 is a diagram showing a modified example of a heating device to which a heated tobacco product is applied. FIG. 5 is a diagram showing a tobacco rod manufacturing apparatus according to the first embodiment. FIG. 6 is a diagram showing a method for producing a tobacco rod in the first embodiment. FIG. 7 is a diagram showing a detailed structure of a slitter in the cutting section. FIG. 8 is a diagram illustrating the calendering process for the tobacco raw material sheet. FIG. 9 is a diagram illustrating a method for producing a tobacco raw material sheet by a papermaking method. FIG. 10 is a diagram illustrating a method for producing a tobacco raw material sheet by a casting method. FIG. 11 is a diagram showing a tobacco strand according to a modified example.

Here, an embodiment of the heated tobacco product, the manufacturing method and the manufacturing device for the heated tobacco product according to the present invention will be described with reference to the drawings. Note that the dimensions, materials, shapes, relative positions, etc. of the components described in the present embodiment are not intended to limit the technical scope of the invention to only those, unless otherwise specified.

<Embodiment 1>
[Heated tobacco products]
1 is a diagram showing a schematic internal structure of a heated tobacco product 1 according to embodiment 1. The heated tobacco product 1 is a type of tobacco product that heats a tobacco filler without burning it, and delivers an aerosol generated in the tobacco filler to a user.

The heated tobacco 1 comprises a tobacco rod 2 and a mouthpiece 3, which are arranged coaxially. The heated tobacco 1 has a mouth end 1a that the user inserts into the oral cavity during use, and a tip 1b at the end opposite to the mouth end 1a. The mouthpiece 3 has a support 4, a cooling section 5, and a filter section 6, which are arranged coaxially, and these members are arranged in order from the tip side of the mouthpiece 3. The support 4, cooling section 5, and filter section 6 of the mouthpiece 3 are integrally wound by a wrapper 7. Furthermore, the tobacco rod 2 and the mouthpiece 3 are connected together by being wound by a tip paper 8. However, a part of the support 4, cooling section 5, and filter section 6 that constitute the mouthpiece 3 may be integrally wound by a wrapper. In that case, the parts wound together by the wrapper and the other parts may be wound by one or more pieces of tip paper. The symbol CL1 shown in FIG. 1 is the central axis of the heated tobacco 1. Here, the tobacco rod 2 and the mouthpiece portion 3 of the heated tobacco 1 are arranged coaxially, and the central axis CL1 can be said to be the central axis of the tobacco rod 2 and the mouthpiece portion 3. Also, in FIG. 1, the symbol 2a indicates the front end surface of the tobacco rod 2, and the symbol 2b indicates the rear end surface of the tobacco rod 2.

When the heated tobacco 1 is in use, air is drawn by the user through the heated tobacco 1 from the tip 1b to the mouth end 1a. The tip 1b of the heated tobacco 1 can be considered as the tip or upstream end of the tobacco rod 2, and the mouth end 1a of the heated tobacco 1 can be considered as the rear end or downstream end of the mouthpiece portion 3.

The tobacco rod 2 is disposed at the tip 1b of the heated tobacco 1. The tobacco rod 2 is a rod-shaped member wrapped in cigarette paper 22 so as to cover the side of the tobacco filler 21 containing the tobacco raw material and the aerosol-generating substrate. In this embodiment, the tobacco filler 21 has a plurality of tobacco strands 23 in the form of a strand, which is a tobacco raw material containing an aerosol-generating substrate. In this specification, the term "strand-shaped" means a long and slender shape extending in a long axis direction perpendicular to the cross-sectional direction compared to the cross-sectional direction, and includes, for example, a belt-like, rectangular, string-like, rod-like, and other shapes. In addition, the term "strand-shaped" is not limited to a shape extending linearly in the long axis direction, and may extend in a meandering or wavy shape. In addition, the aerosol-generating substrate contained in the tobacco strands 23 of the tobacco filler 21 is a substance that generates an aerosol when a volatile substance that is volatilized and released when heated by a heater is cooled. The type of the aerosol-generating substrate is not particularly limited, and various extracted substances from natural products can be appropriately selected according to the application. Examples of the aerosol-generating base material include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof. The tobacco strands 23 of the tobacco filler 21 may also contain a flavoring. The type of flavoring is not particularly limited. In this embodiment, the content of the aerosol-generating base material in the tobacco rod 2 may be 10 wt % or more and 25 wt % or less.

Figure 2 is a perspective view showing an example of a tobacco strand 23. In the example shown in Figure 2, the tobacco strand 23 has a rectangular shape (e.g., a thin rectangular parallelepiped shape). As shown in Figure 2, the tobacco strand 23 can also be seen as having a band shape. In this embodiment, a large number (multiple) of tobacco strands 23 are oriented and arranged in the tobacco filler 21 of the tobacco rod 2, and each tobacco strand 23 is aligned so as to extend along the longitudinal direction (the direction of the central axis CL1) of the tobacco rod 2. In the tobacco strand 23, a cross section perpendicular to the longitudinal direction is rectangular.

Reference numeral 23a in FIG. 2 denotes a front end surface of the tobacco strand 23, and reference numeral 23b denotes a rear end surface of the tobacco strand 23. The front end surface 23a of the tobacco strand 23 is an end surface facing the tip 1b of the heated tobacco 1, and the rear end surface 23b of the tobacco strand 23 is an end surface opposite to the front end surface 23a in the longitudinal direction (extension direction) of the tobacco strand 23. In this embodiment, the rear end surface 23b of the tobacco strand 23 is disposed opposite to the front end surface of the support part 4 disposed at the front end of the mouthpiece part 3. Reference numeral 23c in FIG. 2 denotes a side surface of the tobacco strand 23. The tobacco strand 23 shown in FIG. 2 has the same width dimension and thickness dimension from the front end surface 23a to the rear end surface 23b. In other words, the tobacco strand 23 shown in FIG. 2 has a uniform cross-sectional area over its entire length.

As shown in FIG. 1, the tobacco strands 23 are aligned so as to extend along the longitudinal direction of the tobacco rod 2, and are arranged with their side surfaces 23c facing each other. In the example shown in FIG. 1, the tobacco strands 23 are arranged parallel to each other along the longitudinal direction of the tobacco rod 2. The tobacco strands 23 are also arranged to extend from the front end surface 2a to the rear end surface 2b of the tobacco rod 2. The reference numeral 25 shown in FIG. 1 denotes an aerosol flow path formed by the gaps between the tobacco strands 23. In this embodiment, since the tobacco strands 23 are arranged parallel to each other along the longitudinal direction of the tobacco rod 2, for example, the aerosol flow path 25 is formed to extend along the longitudinal direction of the tobacco rod 2.

Here, the details of the manufacturing method of the tobacco strand 23 and the tobacco rod 2 including the tobacco strand 23 will be described later, but for example, the tobacco strand 23 can be obtained by cutting a tobacco raw material sheet obtained by forming a tobacco raw material containing an aerosol-generating substrate into a sheet shape by slitting it with a slitter or the like. The tobacco raw material sheet may be a so-called reconstituted tobacco sheet. The reconstituted tobacco sheet may be, for example, a homogenized tobacco sheet that is kneaded with additives such as binders, gelling agents, crosslinking agents, flavorings, viscosity modifiers, moisturizing agents, and reinforcing agents, and is formed into a sheet shape and dried by an appropriate method such as a papermaking method (papermaking method), a casting method (slurry method), a rolling method, or an extrusion method. The homogenized tobacco is a tobacco material obtained by crushing, grinding, and mixing, for example, leaf tobacco, dried tobacco leaves, shredded tobacco, expanded tobacco, reconstituted tobacco, etc.

Next, the mouthpiece section 3 will be described. The support section 4 is located on the front end side of the mouthpiece section 3, and is a segment located at the connection end where the mouthpiece section 3 is connected to the tobacco rod 2. The support section 4 is located immediately downstream of the tobacco rod 2 and is arranged in a state of abutting against the rear end of the tobacco rod 2. The support section 4 may be, for example, a hollow cellulose acetate tube. In other words, the support section 4 may be a cylindrical cellulose acetate fiber bundle with a center hole formed through the center of the cross section. The support section 4 may also be in other forms, such as a paper filter filled with cellulose fibers or a paper tube. Any paper tube with a certain thickness can effectively function as the support section 4. The support section 4 is a segment for preventing the tobacco filler 21 from being pushed downstream toward the cooling section 5 within the heated tobacco 1 when the electric heater of the heating device to which the heated tobacco 1 is applied is inserted into the tobacco rod 2. The support section 4 also functions as a spacer for separating the cooling section 5 of the heated tobacco 1 from the tobacco rod 2.

The cooling section 5 is located immediately downstream of the support section 4 and is disposed in contact with the rear end of the support section 4. When the heated tobacco 1 is used, the volatile substances released from the tobacco rod 2 (tobacco filler 21) flow downstream along the cooling section 5. The volatile substances released from the tobacco rod 2 (tobacco filler 21) are cooled by the cooling section 5 to form an aerosol that is inhaled by the user. In the embodiment shown in FIG. 1, the cooling section 5 is formed of a hollow paper tube having an air hole 5a that can introduce outside air. However, the cooling section 5 does not have to have the air hole 5a. The cooling section 5 may also have a heat absorbing agent arranged so as not to interfere with the flow of the volatile substances and aerosol. For example, the cooling section 5 may be formed of a filter material in which a large number of flow paths (through holes) are formed along the longitudinal direction (axial direction) of the mouthpiece section 3.

The filter section 6 is a segment located at the rear end of the mouthpiece section 3, i.e., on the mouth end 1a side. The filter section 6 may be located immediately downstream of the cooling section 5 and may be arranged in contact with the rear end of the cooling section 5. In the embodiment shown in FIG. 1, the filter section 6 may have a filter material formed of cellulose acetate fibers formed into a cylindrical shape, for example. The filter section 6 may also be a center hole filter, a paper filter filled with cellulose fibers, or a paper tube without a filter material. The filter section 6 may be formed of any of a solid filter material with a filter material, a center hole filter, a paper filter, and a paper tube without a filter material, or may be formed by selectively combining a plurality of these.

Figure 3 is a schematic diagram of a heating device 100 to which the heated tobacco product 1 according to the first embodiment is applied. The heating device 100 has a housing 102, which is a case for accommodating various components. An electric heater 103, a controller (control unit) 104, a power source 105, etc. are accommodated in the housing 102. The housing 102 has a storage cavity 107 including an opening 106 into which the tobacco rod 2 of the heated tobacco product 1 is inserted. The storage cavity 107 is a cylindrical hollow portion for accommodating the tobacco rod 2, and corresponds to a rod storage portion into which the tobacco rod 2 can be attached. The present invention can also be provided as a heated tobacco product including the heated tobacco product 1 and the heating device 100 to which the heated tobacco product 1 is applied.

As shown in FIG. 3, an electric heater 103 is provided in the storage cavity 107. The electric heater 103 shown in FIG. 3 has a cylindrical shape and is vertically protruded from the center of the bottom 107a of the storage cavity 107 toward the opening 106. However, the shape of the electric heater 103 is not particularly limited. For example, the tip side of the electric heater 103 may be pointed. For example, the electric heater 103 may have a conical shape and gradually taper from the base end connected to the bottom 107a of the storage cavity 107 toward the tip side. In addition, the electric heater 103 may have a truncated cone shape (truncated cone shape) or a blade shape. In addition, the electric heater 103 may have other shapes. In this embodiment, the central axis of the electric heater 103 may be coaxial with the central axis of the storage cavity 107. The type of the electric heater 103 is not particularly limited, but may be, for example, a steel material with heating wires (e.g., nichrome, iron chrome, iron nickel, etc.) stretched around it, or a ceramic heater, sheathed heater, etc. A sheathed heater is a heater in which a heating wire is covered with a metal pipe together with a filler.

The electric heater 103 of the heating device 100 configured as described above is a so-called internal heating heater. That is, when the tobacco rod 2 is attached to the storage cavity 107 during use of the heated tobacco 1, the electric heater 103 is fitted or inserted into the tobacco filler 21 from the front end surface 2a side of the tobacco rod 2 in the heated tobacco 1, and the heated electric heater 103 heats the tobacco filler 21 from the inside. The controller (control unit) 104 controls the power supply 105 to the electric heater 103, and the electric heater 103 generates heat to heat the tobacco filler 21 (tobacco strand 23) of the tobacco rod 2 attached to the storage cavity 107. As a result, the aerosol generating base material contained in the tobacco filler 21 (tobacco strand 23) volatilizes to generate aerosol, and the aerosol is supplied to the oral cavity of the user who inhales the mouthpiece portion 3.

According to the heated tobacco 1 of the present embodiment, each of the tobacco strands 23 in the tobacco rod 2 is oriented and arranged so as to extend along the longitudinal direction (the direction of the central axis CL1) of the tobacco rod 2, and each of the tobacco strands 23 is aligned so as to extend along the longitudinal direction (the direction of the central axis CL1) of the tobacco rod 2. Furthermore, in the tobacco rod 2 of the present embodiment, the aerosol flow paths 25, which are the gaps between each of the tobacco strands 23, are formed so as to extend along the longitudinal direction of the tobacco rod 2. Therefore, the aerosol generated by the volatilization of the aerosol generating base material contained in the tobacco strands 23 during heating by the electric heater 103 can be guided to the mouthpiece portion 3 through the aerosol flow path 25. According to this, the aerosol generated in the tobacco rod 2 is less likely to be condensed due to contact with the tobacco strands 23, and is less likely to be filtered by the tobacco strands 23. Therefore, according to the heated tobacco 1 of the present embodiment, the amount of aerosol delivered to the user's oral cavity can be improved compared to the conventional art.

In addition, according to the heated tobacco 1 of this embodiment, the tobacco strands 23 in the tobacco rod 2 are aligned along the longitudinal direction (the direction of the central axis CL1) of the tobacco rod 2, which makes it easier to fit or insert the electric heater 103 from the tip 1b side of the tobacco rod 2 compared to the conventional case in which the tobacco raw material is randomly oriented. This makes it easier to fit or insert the electric heater 103 into the tobacco rod 2, providing a heated tobacco 1 that is easy for the user to use. As described above, the tobacco rod 2 of the heated tobacco 1 of this embodiment has an excellent aerosol delivery amount, and also enables the electric heater 103 to be smoothly inserted into the tobacco filler 21.

The heating device applied to the heated tobacco product 1 in this embodiment may be equipped with an external heating type heater as shown in FIG. 4, instead of the internal heating type as shown in FIG. 3. The heating device 100 shown in FIG. 4 has the same structure as the heating device 100 shown in FIG. 3, except that the electric heater 103 is an external heating type. The electric heater 103 shown in FIG. 4 is an annular external heating type heater formed along the cavity side peripheral wall 107b of the storage cavity 107. The electric heater 103 shown in FIG. 4 may be arranged along the cavity side peripheral wall 107A so as to be flush with the cavity side peripheral wall 107b. When the heated tobacco product 1 is applied to the heating device 100 equipped with the external heating type electric heater 103 as shown in FIG. 4, when the heated tobacco product 1 is used, the tobacco filler 21 is heated by the electric heater 103 from the outside of the tobacco rod 2 attached to the storage cavity 107.

Here, a preferred range of the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 will be described. The volumetric filling rate of the tobacco strands 23 referred to here refers to the ratio of the total volume of all the tobacco strands 23 contained in the tobacco rod 2 to the volume of the tobacco rod 2. If the volumetric filling rate of the tobacco strands 23 is excessively high, there is a concern that the airflow resistance of the tobacco rod 2 (tobacco filler 21) will be excessively high. As a result, there is a concern that the aerosol generated in the tobacco rod 2 during use will be filtered (captured) by the tobacco strands 23 in the tobacco rod 2 before being introduced into the mouthpiece portion 3, resulting in a reduced amount of aerosol delivered. On the other hand, if the volumetric filling rate of the tobacco strands 23 is excessively low, there is a concern that the efficiency of heat transfer to the tobacco strands 23 during heating by the electric heater 103 will decrease, resulting in a reduced amount of aerosol delivered. For example, when using the internal heating type electric heater 103 shown in FIG. 3, when the electric heater 103 is inserted into the tobacco rod 2, there is a risk that the contact between the electric heater 103 and the tobacco strand 23 will be insufficient, resulting in insufficient heating of the tobacco strand 23.

In consideration of the above circumstances, the inventors of the present invention have conducted intensive studies and found that it is preferable to set the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 to 50 vol% or more and 80 vol% or less. This makes it possible to suppress the airflow resistance of the tobacco rod 2 (tobacco filler 21) from becoming excessively high, while suppressing a decrease in the heat transfer efficiency from the electric heater 103 to the tobacco strands 23. As a result, it is possible to suppress a decrease in the amount of aerosol delivered during use. Furthermore, if the volumetric filling rate of the tobacco strands 23 is lower than 50 vol%, in addition to the decrease in the heat transfer efficiency from the electric heater 103 to the tobacco strands 23, there is also a concern that the manufacturing suitability of the tobacco rod 2 will decrease. Furthermore, if the volumetric filling rate of the tobacco strands 23 exceeds 80 vol%, in addition to the fact that it becomes difficult to insert the electric heater 103 into the tobacco rod 2 and that the airflow resistance is likely to increase, there is also a concern that the aerosol will be trapped (captured) midway, and the delivery efficiency of the aerosol will decrease. For the above reasons, the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 is preferably in the range of 50 vol % or more and 80 vol % or less.

The preferred range of the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 differs depending on the heating method (internal heating heater, external heating heater) of the electric heater 103 of the heating device 100 to which the heated tobacco 1 is applied. In addition, when the electric heater 103 is an internal heating type, the preferred range of the volumetric filling rate of the tobacco strands 23 also differs depending on whether the electric heater 103 is inserted into the tobacco rod 2 (the tobacco rod 2 is attached to the heating device 100). For example, when the electric heater 103 of the heating device 100 to which the heated tobacco 1 is applied is an external heating heater, the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 is preferably 60 vol% or more and 80 vol% or less.

Furthermore, when the electric heater 103 of the heating device 100 to which the heated tobacco product 1 is applied is an internal heating heater, the volumetric filling rate of the tobacco strands 23 occupying the tobacco rod 2 is preferably 50 vol% or more and 75 vol% or less, and more preferably 60 vol%. The above-mentioned volumetric filling rates refer to preferred ranges of the volumetric filling rate of the tobacco strands 23 before the tobacco rod 2 is mounted in the accommodation cavity 107 of the heating device 100. When the electric heater 103 is an internal heating heater, the tobacco strands 23 in the tobacco rod 2 are pushed outward toward the outer periphery of the tobacco rod 2 by the electric heater 103 when the electric heater 103 is inserted into the tobacco rod 2. Taking this into consideration, the preferred range of the volume filling rate of the tobacco strand 23 (50 vol.% or more and 75 vol.% or less) when the electric heater 103 of the heating device 100 to which the heated tobacco 1 is applied is an internal heating type heater is lower than the preferred range of the volume filling rate of the tobacco strand 23 (60 vol.% or more and 80 vol.% or less) when the electric heater 103 is an external heating type heater.

When the electric heater 103 of the heating device 100 to which the heated tobacco 1 is applied is an internal heating heater, it is preferable that the volume filling rate of the tobacco strand 23 when the tobacco rod 2 is attached to the storage cavity 107, i.e., when the internal heating heater is inserted into the tobacco rod 2, is 60 vol% or more and 80 vol% or less. Here, the volume filling rate of the tobacco strand 23 when the tobacco rod 2 is attached to the storage cavity 107 is the ratio of the total volume of the tobacco strand 23 to the volume calculated by subtracting the volume of the tobacco rod 2 occupied by the electric heater 103 from the volume of the tobacco rod 2.

In addition, when comparing under conditions where the volumes of the tobacco strands 23 contained in the tobacco rod 2 in this embodiment are equal, the larger the surface area of the tobacco strands 23, the higher the aerosol delivery amount. If the width of each tobacco strand 23 is large, when the internal heating type electric heater 103 is inserted into the tobacco rod 2, the volume filling rate of the tobacco strands 23 is likely to be non-uniform within the cross section of the tobacco rod 2, and there is a concern that the aerosol delivery characteristics are likely to vary. Therefore, from the viewpoint of increasing the aerosol delivery amount and making the aerosol delivery characteristics uniform, it is preferable to arrange more tobacco strands 23 with smaller cross-sectional areas in the tobacco rod 2. However, if the cross-sectional area of the tobacco strands 23 is made excessively small, the tensile strength of the tobacco strands 23 becomes too small, and there is a concern that the manufacturing suitability of the tobacco rod 2 will decrease. From the viewpoint of ensuring a good balance between an improvement in the amount of aerosol delivered, a uniform delivery of the aerosol, and an improvement in the manufacturing suitability of the tobacco rod 2, it is preferable that the width dimension of the cross section of the tobacco strand 23 is 0.4 mm or more and 3 mm or less, and the thickness dimension of the cross section of the tobacco strand 23 is 0.02 mm or more and 1.3 mm or less. In one example, the length dimension of the tobacco strand 23 along the major axis direction is 10 mm or more and 50 mm or less. As described above, the tobacco strand 23 in this embodiment has a uniform cross-sectional area over its entire length, and therefore, when heated by the electric heater 103, variation in the amount of aerosol generated in the major axis direction of the tobacco strand 23 is unlikely to occur.

In this embodiment, the dimensions of the tobacco rod 2 are not particularly limited, but an example is one in which the length in the longitudinal direction of the tobacco rod 2 is 10 mm or more and 50 mm or less, and the diameter of the cross section perpendicular to the longitudinal direction of the tobacco rod 2 is 5.0 mm or more and 8.0 mm or less. In a heating device 100 to which a heated tobacco 1 is applied, an example is one in which the maximum diameter of the electric heater 103 is 2.5 mm or more and 3.2 mm or less. An example is one in which the ratio of the maximum diameter of the electric heater 103 to the diameter of the cross section of the tobacco rod 2 is 0.3 or more and 0.6 or less. In another example, the length in the longitudinal direction of the tobacco strand 23 arranged in the tobacco rod 2 is approximately equal to the length in the longitudinal direction of the tobacco rod 2.

<Tobacco rod manufacturing apparatus and manufacturing method>
Next, a description will be given of a manufacturing device and a manufacturing method for the tobacco rod 2 in the heat-not-burn tobacco 1. Fig. 5 is a diagram showing a manufacturing device 1000 for the tobacco rod 2 in the embodiment 1 (hereinafter, referred to as a "rod manufacturing device"). Fig. 6 is a diagram showing a manufacturing method for the tobacco rod 2 in the heat-not-burn tobacco 1.

The rod manufacturing device 1000 includes a first bobbin 1100 on which a tobacco raw material sheet 200 is wound into a roll, a cutting section 1200, a forming section 1300, a cutting section 1400, and the like. The tobacco raw material sheet 200 wound on the first bobbin 1100 is a sheet material obtained by forming a tobacco raw material containing an aerosol-generating base material into a sheet. Examples of the tobacco raw material include tobacco shreds, tobacco granules, and reconstituted tobacco material. In this embodiment, an example is described in which a reconstituted tobacco is formed into a sheet and used as the tobacco raw material sheet 200. The tobacco raw material sheet 200 is cut in the cutting section 1200 and then cut in the cutting section 1400 to become the tobacco strands 23 of the tobacco rod 2 described above.

In the rod manufacturing apparatus 1000, the first bobbin 1100 is rotatably held by a bobbin holder 1110. The tobacco raw material sheet 200 wound on the first bobbin 1100 is continuously unwound by a feed roller disposed at an appropriate position, and sent out along the conveying path P. As shown in FIG. 5, the cutting section 1200 in the rod manufacturing apparatus 1000 is disposed in the middle of the conveying path P. In this specification, the front side along the flow direction of the conveying path P is defined as "downstream" and the rear side as "upstream". In the arrangement example shown in FIG. 5, the shaping section 1300 is disposed downstream (rear stage) of the cutting section 1200, and the cutting section 1400 is disposed further downstream (rear stage) of the shaping section 1300. In the sheet-shaped tobacco raw material sheet 200, the direction along the conveying path P is referred to as the "sheet length direction (longitudinal direction)" and the direction perpendicular to the conveying path P is referred to as the "sheet width direction". In the rod manufacturing apparatus 1000, the direction perpendicular to the transport path P is referred to as the "apparatus width direction." Reference numeral 1500 in Fig. 5 denotes a transport tray extending along the transport path P. The sheet-like tobacco raw material sheet 200 is introduced into the cutting section 1200 while traveling on the transport tray 1500 along the transport path P.

The cutting section 1200 is a unit that continuously cuts the tobacco raw material sheet 200 into a plurality of tobacco strand continuous bodies 300 along the conveying path. FIG. 7 is a diagram showing the detailed structure of the slitter 1210 in the cutting section 1200, showing the slitter 1210 viewed from above. The slitter 1210 has a plurality of circular cutter disks 1220. The centers of the plurality of circular cutter disks 1220 are connected to each other by a rotating shaft member 1230. The rotating shaft member 1230 is rotatably supported on the base of the rod manufacturing device 1000, and each cutter disk 1220 can rotate integrally around the rotating shaft member 1230. Here, the rotating shaft member 1230 in the slitter 1210 extends horizontally in a direction perpendicular to the conveying path P in the rod manufacturing device 1000, that is, along the device width direction. As shown in FIG. 7, each cutter disk 1220 in the slitter 1210 is arranged in a direction perpendicular to the rotating shaft member 1230 and parallel to the conveying path P. Also, each cutter disk 1220 in the slitter 1210 is arranged at regular intervals along a direction perpendicular to the conveying path P (the device width direction).

In the manufacturing method of the tobacco rod 2 in this embodiment, the tobacco raw material sheet 200 obtained by forming the tobacco raw material containing the aerosol-generating substrate into a sheet shape is transported from the first bobbin 1100 along the transport path P, and in the cutting process (S101 in FIG. 6), the tobacco raw material sheet 200 is continuously cut into a plurality of strand-shaped tobacco strand continuous bodies 300 along the transport path P. That is, the tobacco raw material sheet 200 passes through the cutting section 1200 (each cutter disk 1220 arranged parallel to the transport path P) along the transport path P, and the tobacco raw material sheet 200 is continuously cut into a plurality of tobacco strand continuous bodies 300 by each cutter disk 1220.

The slitter 1210 of the cutting section 1200 has a number of cutter disks 1220 arranged at regular intervals along a direction perpendicular to the conveying path P. Therefore, in the cutting section 1200, the tobacco raw material sheet 200 is cut into a plurality of tobacco strand continuous bodies 300 having a constant width. The tobacco strand continuous body 300 is a long tobacco material extending along the conveying path P. Note that the slitter 1210 only needs to be able to cut the tobacco raw material sheet 200 into a plurality of continuous tobacco strands 300 in a continuous strand shape along the conveying path P, and may cut the tobacco raw material sheet 200 using a member other than each cutter disk 1220. For example, the slitter 1210 may have a roll cutter with comb blades arranged at regular intervals along the width direction of the device.

The multiple tobacco strand continuous bodies 300 cut from the tobacco raw material sheet 200 in the cutting section 1200 are sent to the downstream forming section 1300 along the conveying path P while aligned in the width direction of the conveying tray 1500.

The forming section 1300 has a second bobbin 1310 on which a long cigarette paper web 400 is wound into a roll. The cigarette paper web 400 is a long web material that becomes the cigarette paper 22 of the tobacco rod 2. The forming section 1300 further includes a converging section 1320, a wrapping mechanism 1330, an adhesive applicator 1340, and the like. The converging section 1320 is disposed near the entrance of the forming section 1300, and converges a plurality of tobacco strands 300 fed from the upstream side to form a cylindrical shape (i.e., a rod shape). The converging section 1320 can be, for example, a combination of a tongue member and a horn, a converging funnel shape, or a conveying jet shape.

The wrapping mechanism 1330 in the forming section 1300 is provided after the converging section 1320. The wrapping mechanism 1330 has an endless garniture belt 1350. The garniture belt 1350 is made of a woven material or a woven web, and is driven by a driving drum 1360 to run at a constant speed in the direction of the arrow in the figure. The long wrapping web 400 unwound from the second bobbin 1310 is continuously supplied onto the garniture belt 1350 in the forming section 1300.

Meanwhile, the plurality of continuous tobacco strands 300 shaped into a rod shape at the converging portion 1320 in the forming section 1300 are superimposed on the long cigarette paper web 400 on the garniture belt 1350. In the process of transporting the plurality of continuous tobacco strands 300 superimposed on the long cigarette paper web 400 on the garniture belt 1350 along the transport path P by the garniture belt 1350, the cigarette paper web 400 is wound around the outer periphery of the plurality of continuous tobacco strands 300 aligned in a rod shape, and the plurality of continuous tobacco strands 300 are enveloped by the cigarette paper web 400. An adhesive (e.g., hot melt adhesive, CMC (carboxymethyl cellulose), PVA (polyvinyl alcohol), EVA (ethylene vinyl acetate copolymer), etc.) is applied by an adhesive applicator 1340 to the seam formed by the overlapping edges of the cigarette paper web 400. As a result, a rod-shaped, long tobacco rod continuous body 500 is formed (forming step, S102 in FIG. 6).

The manufacturing method of the tobacco rod 2 in this embodiment may further include an addition step of adding at least one of a flavoring and an aerosol-generating substrate to the multiple tobacco strand continuous bodies 300 obtained in the cutting step (cutting section 1200). For example, the above-mentioned addition step may add at least one of a flavoring and an aerosol-generating substrate to the multiple tobacco strand continuous bodies 300 in the process of wrapping the multiple tobacco strand continuous bodies 300 with cigarette paper (cigarette paper web 400) in the molding step (molding section 1300). The method of adding the flavoring and the aerosol-generating substrate to the multiple tobacco strand continuous bodies 300 is not particularly limited, but the flavoring and the aerosol-generating substrate may be added to the tobacco strand continuous body 300 by ejecting them from an addition nozzle. Of course, the addition nozzle for adding the flavoring and the addition nozzle for adding the aerosol-generating substrate may be provided separately. In addition, menthol and the like can be exemplified as the flavoring, but other flavorings may be added. As described above, when flavoring or aerosol-generating base material is added to the tobacco strand continuous body 300 during the process of wrapping the multiple tobacco strand continuous bodies 300 with cigarette paper (cigarette paper web 400) in the molding process (molding section 1300), an addition nozzle may be installed at an appropriate location in the molding section 1300. In addition, the addition nozzle that adds flavoring or aerosol-generating base material to the tobacco strand continuous body 300 may be provided at any location between the cutting section 1200 and the molding section 1300 on the conveying path P.

The tobacco rod continuous body 500 obtained in the molding section 1300 (molding process) is sent to the cutting section 1400 located after the molding section 1300. The cutting section 1400 has a cutting means such as a rotary cutter or a knife, and the long tobacco rod continuous body 500 is cut to a certain length in the cutting section 1400. That is, in the cutting process (S103 in FIG. 6), the tobacco rod continuous body 500 obtained in the molding process (S102 in FIG. 6) is cut into individual tobacco rods in sequence to obtain the tobacco rods of the heated tobacco 1. As is clear from the above explanation, the multiple tobacco strand continuous bodies 300 cut from the tobacco raw material sheet 200 in the cutting section 1200 are connected along the conveying direction in the conveying path P until they are cut in the axial direction in the cutting section 1400.

As described above, according to the tobacco rod 2 manufacturing method and rod manufacturing apparatus 1000 of the present embodiment, the tobacco rod 2 related to the heated tobacco product 1 can be suitably manufactured.
In particular, the manufacturing method of the tobacco rod 2 and the rod manufacturing apparatus 1000 in this embodiment are characterized in that the tobacco raw material sheet 200 is continuously cut into a plurality of continuous tobacco strands 300 in the cutting section 1200, and then, before the continuous tobacco strands 300 are cut into short lengths in the cutting section 1400, the continuous tobacco strands 300 aligned along the transport path P are wrapped with cigarette paper (cigarette paper web 400) in the forming section 1300 to form a long continuous tobacco rod 500. In this manner, the plurality of tobacco strands 23 can be aligned and arranged so that the plurality of tobacco strands 23 extend along the axial direction of the tobacco rod 2. In other words, a tobacco rod 2 in which the plurality of tobacco strands 23 are arranged parallel to one another along the longitudinal axis of the tobacco rod 2 can be easily manufactured.

In the rod manufacturing apparatus 1000, the tobacco strand 23 having the desired thickness can be obtained by adjusting the thickness of the tobacco raw material sheet 200 wound on the first bobbin 1100. In addition, the tobacco strand 23 having the desired width can be obtained by adjusting the interval between the cutter disks 1220 in the slitter 1210 arranged in the cutting section 1200. In this embodiment, when the tobacco raw material sheet 200 is cut in the cutting section 1200 (cutting process), it is cut into a plurality of tobacco strand continua 300 having a constant width, so that the cross-sectional area (width dimension) of each tobacco strand 23 arranged in the tobacco rod 2 can be made uniform. This makes it easier to suppress the occurrence of uneven aerosol delivery characteristics in the cross section of the tobacco rod 2 when the heated tobacco 1 is used, and aerosol can be stably supplied to the user.

The manufacturing method of the tobacco rod 2 in this embodiment may also include a calendaring process in which the tobacco raw material sheet 200 used to manufacture the tobacco rod 2 is pre-calendered to increase the density of the tobacco raw material sheet 200, and a winding process in which the tobacco raw material sheet 200 after the calendaring process is wound around the first bobbin 1100.

Figure 8 is a diagram illustrating the calendaring process for the tobacco raw material sheet 200. The calendaring process is performed by continuously passing the tobacco raw material sheet 200 between a pair of press rollers 600, 600 as shown in Figure 7, for example, to press the tobacco raw material sheet 200. By performing the calendaring process on the tobacco raw material sheet 200, the tobacco raw material sheet 200 becomes dense and its density can be increased. As a result, the weight of the tobacco strands 23 can be increased while preventing the volume filling rate of the tobacco strands 23 contained in the manufactured tobacco rod 2 from becoming excessively high and the airflow resistance of the tobacco rod 2 from becoming excessively high. As a result, the amount of aerosol delivered in the tobacco rod 2 can be further increased.

After the above-described calendaring process, the tobacco raw material sheet 200 is wound around the first bobbin 1100 in the winding process. The tobacco raw material sheet 200 wound around the first bobbin 1100 is used to manufacture the tobacco rod 2 by being continuously pulled out along the transport path P as described in Figures 5 and 6.

As for the manufacturing method of the tobacco raw material sheet 200, any suitable method such as the papermaking method (papermaking method), the casting method (slurry method), the rolling method, the extrusion method, etc., as described above, can be used.

FIG. 8 is a diagram for explaining a method for producing a tobacco raw material sheet 200 by a papermaking method (papermaking method). As shown in FIG. 8, first, in step S201, tobacco raw materials including tobacco midribs, tobacco lamina, tobacco shreds, tobacco powder, etc. are extracted with water (extraction step). In the extraction step, for example, 10 times the amount of water is added to the tobacco raw material, and the mixture is heated at a predetermined temperature for a predetermined time while stirring to obtain a mixture. Then, in step S202, the mixture obtained in the extraction step is squeezed, for example, using a screw press dehydrator, etc., to separate into an aqueous tobacco extract (liquid) and an insoluble tobacco residue (solid) (separation step). Next, in step S203, water and pulp (cellulose fiber) are added to the insoluble tobacco residue obtained in the separation step, and the insoluble tobacco residue is beaten, for example, using a refiner to adjust the fiber length and fluff the fibers to make them into fibers (beating step).

Next, in step S204, the insoluble tobacco residue and pulp fiberized in the beating process are made into a sheet using a papermaking machine, and then dried to obtain a base sheet (papermaking process). Then, in step S205, an additive liquid containing a concentrated aqueous tobacco extract obtained in the separation process and an aerosol-generating base material such as glycerin or propylene glycol is added to the base sheet (aromatization process). Note that the concentrated aqueous tobacco extract added to the base sheet in the aromatization process is obtained, for example, by concentrating the aqueous tobacco extract using an evaporator. Next, in step S206, the aromatized base sheet obtained in the aromatization process is dried (drying process).

The above manufacturing method allows the tobacco raw material sheet 200 to be manufactured by the papermaking method (papermaking method). However, the above manufacturing method is merely illustrative, and steps can be added, omitted, or replaced as appropriate. Note that, in the tobacco raw material sheet 200 manufactured by the papermaking method (papermaking method), an embodiment in which the content of the aerosol-generating substrate is 15.0 wt%, the content of the tobacco raw material is 79.05 wt%, and the content of the pulp is 5.95 wt% is one example, but it is of course not limited to this. Note that, in the tobacco raw material sheet 200 manufactured by the papermaking method (papermaking method), it is preferable that the content of the aerosol-generating substrate is 10 wt% or more and 25 wt% or less.

Figure 9 is a diagram illustrating a method for producing a tobacco raw material sheet 200 by the casting method (slurry method). As shown in Figure 9, first, in step S301, tobacco raw materials including tobacco midribs, tobacco lamina, tobacco shreds, tobacco powder, etc. are finely pulverized, and then a small amount of binder (binding agent) and reinforcing agent (defibrated pulp, etc.), a predetermined amount of aerosol generating base material (glycerin, propylene glycol, etc.) and water are mixed, for example, in a stirring tank, to obtain a slurry (suspension) (slurry obtaining process). Examples of binders (binding agents) include guar gum, xanthan gum, and CMC (methylol cellulose).

Next, in step S302, the slurry obtained in the slurry obtaining step is cast (stretched) into a sheet shape, for example, on a steel belt (support), to obtain a slurry web (casting step). Next, in step S303, the sheet-shaped slurry web stretched into a sheet shape is dried (drying step). Through the above steps, a tobacco raw material sheet 200 is obtained. Note that, in the tobacco raw material sheet 200 produced by the casting method (slurry method), an embodiment in which the content of the aerosol generating base material (for example, glycerin) is 15.0 wt%, the content of the tobacco raw material is 76.0 wt%, the content of the pulp is 6.0 wt%, and the content of the binder is 3.0 wt% is given as an example, but is of course not limited to this.

Although the embodiment of the present invention has been described above, the heated tobacco, heated tobacco product, and manufacturing method and manufacturing device for a tobacco rod in a heated tobacco according to the present invention are not limited thereto. For example, in the above-mentioned Figs. 1 and 2, the tobacco strand 23 arranged in the tobacco rod 2 is described as having a straight shape without a bent portion, but the tobacco strand 23 may have any other shape as long as it has a long and slender shape extending in the longitudinal direction. Fig. 11 is a diagram showing a tobacco strand 23A according to a modified example. The tobacco strand 23A shown in Fig. 11 has a meandering shape (zigzag shape). The tobacco strand 23A extending in such a meandering shape is aligned and arranged in the tobacco rod 2 so that its longitudinal axis (extension direction) extends along the longitudinal axis direction of the tobacco rod 2. The tobacco strand 23A having such a meandering (zigzag) shape can make it difficult for the tobacco strand 23A to become displaced in the longitudinal direction of the tobacco rod 2, even if the tobacco strand 23A is pushed by the electric heater 103 when inserting the electric heater 103 of the heating device 100 into the tobacco rod 2. As a result, the tobacco strand 23A can be suitably prevented from coming out of the tobacco rod 2 when the electric heater 103 is inserted into the tobacco rod 2.

In addition, compared to the tobacco strand 23 having a straight shape shown in Figs. 1 and 2, the tobacco strand 23A shown in Fig. 11 is relatively more likely to obstruct the flow path of the aerosol generated in the tobacco rod 2 due to heating by the electric heater 103. However, compared to the conventional case in which the tobacco raw material is randomly oriented, condensation and filtration of the aerosol generated in the tobacco rod 2 are relatively less likely to occur, and the amount of aerosol delivered can be improved compared to the conventional case.

When the tobacco strand 23A has a meandering shape (zigzag shape) as shown in FIG. 11, the width of the tobacco strand 23A is preferably uniform from the front end surface 23a to the rear end surface 23b. That is, as shown in FIG. 11, it is preferable that the width dimension W1 of the portion parallel to the longitudinal direction of the tobacco strand 23A is equal to the width dimension W2 of the portion extending in a direction perpendicular to the longitudinal direction. In this way, it is possible to make the cross-sectional area of the tobacco strand 23A uniform over its entire length. As a result, when the tobacco strand 23A is heated by the electric heater 103, the variation in the amount of aerosol generated in the longitudinal direction of the tobacco strand 23A can be suitably suppressed. Although the tobacco strand 23A shown in FIG. 11 has a meandering shape (zigzag shape), it may have a wavy shape or other shapes.

DESCRIPTION OF SYMBOLS 1...Heat-not-burn tobacco 2...Tobacco rod 3...Mouthpiece section 4...Support section 5...Cooling section 6...Filter section 21...Tobacco filler 22...Wrapping paper 23...Tobacco strand 25...Aerosol flow path 100...Heating device 103...Electric heater 200...Tobacco raw material sheet 300...Tobacco strand continuous body 500...Tobacco rod continuous body 1000...Rod manufacturing device 1100...First bobbin 1200...Cutting section 1300...Molding section 1400...Cutting section

Claims (6)

A tobacco rod;
A mouthpiece portion arranged coaxially with the tobacco rod;
a tipping paper that connects the tobacco rod and the mouthpiece;
Preparation,
The mouthpiece portion is
A support portion located downstream of the tobacco rod;
a cooling section located downstream of the support section, the cooling section directing the volatile substance released from the tobacco rod downstream and cooling the volatile substance;
a filter unit located downstream of the cooling unit,
The support portion is a hollow tube having a center hole formed therethrough,
The cooling portion is a hollow tube having a through hole formed along a longitudinal direction,
The support portion and the cooling portion are wound by a wrapper,
The cooling unit has a vent hole through which outside air can be introduced,
The vent hole penetrates the tipping paper, the wrapper, and the cooling section, and is located upstream in the cooling section.
Heated tobacco. The diameter of the through hole is larger than the diameter of the center hole.
The heated tobacco product according to claim 1 . The hollow tube forming the support portion is made of cellulose acetate, and the hollow tube forming the cooling portion is made of a filter material.
The heated tobacco product according to claim 1 or 2. A heated tobacco product comprising the heated tobacco according to any one of claims 1 to 3 and a heating device having a storage cavity into which the heated tobacco is inserted,
a heater for heating the tobacco rod from the inside;
Heated tobacco products. a ratio of a maximum diameter of the heater to a cross-sectional diameter of the tobacco rod is 0.3 or more and 0.6 or less;
The heated tobacco product according to claim 4. The heated tobacco product according to claim 4 or 5, wherein the heater has a blade shape.

Images