JP7522864B2 - Non-combustion heated tobacco products and electrically heated tobacco products - Google Patents

Description

The present disclosure relates to non-combustion heated tobacco and electrically heated tobacco products.

In recent years, non-combustion heated tobacco, which is inserted into an electric heating device and used, has been developed as an alternative to cigarettes (Patent Document 1). The non-combustion heated tobacco generally comprises a tobacco rod in which tobacco shreds and a material that produces flavor components are wrapped in cigarette paper, a mouthpiece for inhaling the components produced from the tobacco rod by heating, and tipping paper around which these are wrapped.
Generally, in electrically heated tobacco products, a non-combustion heated tobacco is inserted into an electrically heated device, and then the heater member is turned on to generate heat, heating the tobacco rod from the point of contact with the heater member, and the generated components are delivered to the user.

In non-combustion heated tobacco products, flavorings may be added to the tobacco rod in order to impart a flavor tone to the mainstream smoke. When producing such non-combustion heated tobacco products, a method is generally adopted in which a flavoring solution is added to dried tobacco leaves. This method has the advantage that flavorings can be easily added to dried tobacco leaves by spraying the flavoring solution.

Special Publication No. 2015-508676

However, with conventional non-combustion heated tobacco products, an excessive amount of flavoring is released in the early stages of smoking, and the amount of flavor released decreases rapidly as the puff progresses, resulting in problems such as an unstable flavor from the early stages to the later stages of smoking, and a deterioration of the flavor in the later stages of smoking.
Therefore, an object of the present invention is to provide a non-combustion heated tobacco product that has little variation in the amount of flavor delivered per puff from the early to late stages of smoking, and an electrically heated tobacco product that uses the non-combustion heated tobacco product.

As a result of intensive research, the inventors discovered that the above problems could be solved by incorporating dried tobacco leaves and a flavor-containing material in which a flavor is encapsulated in a polysaccharide gel in the tobacco rod portion, and arrived at the present invention. That is, the gist of the present invention is as follows.

[1]
A rod-shaped non-combustion heat-not-burn tobacco product comprising a tobacco rod portion and a mouthpiece portion,
The mouthpiece portion includes a cooling segment and a filter segment including a filter medium, the cooling segment and the filter segment being adjacent to each other,
The tobacco rod portion is a non-combustion heated tobacco comprising dried tobacco leaves and a flavor-containing material in which a flavor is encapsulated in a polysaccharide gel.
[2]
The non-combustion heat-not-burn tobacco according to [1], wherein openings are provided concentrically in the circumferential direction of the cooling segment, and the openings are present in a region 2 mm to 15 mm from the boundary between the cooling segment and the filter segment toward the cooling segment.
[3]
The non-combustion heated tobacco product according to [1] or [2], wherein the filter segment further includes a center hole segment having one or more hollow portions.
[4]
The tobacco rod portion contains 1% by mass to 20% by mass of the flavor-containing material relative to the dried tobacco leaves.
[5]
The non-combustion heating tobacco according to any one of [1] to [4], wherein the tobacco rod portion contains 1 mg to 30 mg of the flavor in the flavor-containing material.
[6]
The non-combustion heating tobacco according to any one of [1] to [5], wherein the flavoring is menthol.
[7]
An electrically heated tobacco product comprising: an electrically heated device including a heater member, a battery unit serving as a power source for the heater member, and a control unit for controlling the heater member; and a non-combustion heated tobacco product according to any one of [1] to [6], which is inserted so as to come into contact with the heater member.

According to the present invention, it is possible to provide a non-combustion heated tobacco product that has little variation in the amount of flavor delivered per puff from the early to late stages of smoking, and an electrically heated tobacco product that uses the non-combustion heated tobacco product.

1 is a schematic diagram of a non-combustion heated tobacco product according to an embodiment of the present invention. 1 is a schematic diagram of a non-combustion heated tobacco product according to an embodiment of the present invention. 1 is a schematic diagram of an electrically heated tobacco product according to an embodiment of the present invention. 1 is a schematic diagram of an electrically heated tobacco product according to an embodiment of the present invention. FIG. 13 is a diagram illustrating the end of the region where the cooling segment and the electrically heated device contact each other on the suction end side. FIG. 13 is a diagram illustrating the end of the region where the cooling segment and the electrically heated device contact each other on the suction end side. 1 is a graph showing the amount of menthol delivered in an example.

The following describes the embodiments of the present invention in detail, but these descriptions are merely examples (representative examples) of the embodiments of the present invention, and the present invention is not limited to these contents as long as they do not depart from the gist of the present invention.
In addition, in this specification, when an expression is used using "~" followed by a numerical value or physical property value, the values before and after the expression are used as including the values before and after the expression.
In addition, in this specification, "plurality" means two or more, unless otherwise specified.

<Non-combustion heated tobacco>
One embodiment of the present invention is a non-combustion heated tobacco (also simply referred to as a "non-combustion heated tobacco"). This is a rod-shaped non-combustion heated tobacco comprising a tobacco rod portion and a mouthpiece portion, the mouthpiece portion including a cooling segment and a filter segment including a filter material, the cooling segment and the filter segment being adjacent to each other, and the tobacco rod portion including dried tobacco leaves (dried tobacco leaves) and a flavor-containing material in which a flavor is encapsulated in a polysaccharide gel.
A preferred example of a non-combustion heating tobacco product according to this embodiment will be described with reference to FIG.

The non-combustion heated tobacco 10 shown in Figure 1 is a rod-shaped non-combustion heated tobacco comprising a tobacco rod portion 11, a mouthpiece portion 14, and a tipping paper 15 wrapped around them, and the mouthpiece portion 14 includes a cooling segment 12 and a filter segment 13 including a filter material, and the cooling segment 12 is sandwiched adjacent to the tobacco rod portion 11 and the filter segment 13 in the axial direction (also referred to as the "long axis direction") of the non-combustion heated tobacco 10, and an opening V may be provided concentrically in the circumferential direction of the cooling segment 12.

The opening V provided in the cooling segment 12 in the non-combustion heated tobacco 10 shown in Figure 1 is usually a hole for promoting the inflow of air from the outside when the user inhales, and this inflow of air can lower the temperature of the components and air flowing in from the tobacco rod portion 11.
The openings V that may be provided in this embodiment may be present in an area 4 mm or more in the direction toward the cooling segment from the boundary between the cooling segment 12 and the filter segment 13. This configuration can improve the cooling capacity for lowering the temperature of the components and air generated by heating, and further suppress retention of the components and air in the cooling segment, thereby improving the delivery amount of the components.
In addition, examples of components generated by heating include flavor components derived from flavorings, nicotine and tar derived from tobacco leaves, aerosol components derived from aerosol base materials, etc. In this specification, the aerosol base material is a base material for generating aerosol.

The rod-shaped non-combustion heating tobacco 10 preferably has a columnar shape that satisfies an aspect ratio of 1 or more, as defined below.
Aspect ratio = h/w
w is the width of the bottom surface of the columnar body (in this specification, the width of the bottom surface on the tobacco rod portion side), and h is the height of the columnar body, and it is preferable that h≧w. In this specification, the long axis direction is defined as the direction indicated by h. Therefore, even if w≧h, the direction indicated by h will be referred to as the long axis direction for convenience. The shape of the bottom surface is not limited and may be a polygon, a rounded polygon, a circle, an ellipse, etc., and the width w is the diameter when the bottom surface is a circle, the major axis when the bottom surface is an ellipse, or the diameter of the circumscribing circle or the major axis of the circumscribing ellipse when the bottom surface is a polygon or a rounded polygon.
The length h of the non-combustion heated tobacco 10 in the longitudinal direction is not particularly limited, and is, for example, typically 40 mm or more, preferably 45 mm or more, and more preferably 50 mm or more, and is typically 100 mm or less, preferably 90 mm or less, and more preferably 80 mm or less.
The width w of the bottom surface of the columnar body of the non-combustion heated tobacco 10 is not particularly limited, and is, for example, typically 5 mm or more, preferably 5.5 mm or more, and typically 10 mm or less, preferably 9 mm or less, and more preferably 8 mm or less.
The ratio of the lengths of the cooling segment and the filter segment in the longitudinal direction of the non-combustion heat-not-burn tobacco 10 (cooling segment:filter segment) is not particularly limited, but from the viewpoint of the amount of flavoring delivered and an appropriate aerosol temperature, it is usually 0.60-1.40:0.60-1.40, preferably 0.80-1.20:0.80-1.20, more preferably 0.85-1.15:0.85-1.15, even more preferably 0.90-1.10:0.90-1.10, and particularly preferably 0.95-1.05:0.95-1.05.
By setting the ratio of the lengths of the cooling segment and the filter segment within the above range, the cooling effect, the effect of suppressing losses due to adhesion of the generated steam and aerosol to the inner wall of the cooling segment, and the function of adjusting the air volume and flavor of the filter are balanced, thereby realizing a good flavor and flavor intensity. In particular, if the cooling segment is made longer, the particulation of aerosols and the like is promoted and a good flavor can be realized, but if it is too long, the substances passing through will adhere to the inner wall.

The air resistance in the longitudinal direction per non-combustion heated tobacco product 10 is not particularly limited, but from the standpoint of ease of smoking, it is usually ₈ mmH2O or more, preferably 10 mmH2O or more, and more preferably _{12 mmH2O} or more, and is usually ₁₀₀ mmH2O or less, preferably ₈₀ mmH2O or less, and more preferably ₆₀ mmH2O or less.
The airflow resistance is measured according to the ISO standard method (ISO6565:2015), for example, using a filter airflow resistance meter manufactured by Cerulean Co., Ltd. The airflow resistance refers to the air pressure difference between the first end face and the second end face when air is flowed at a predetermined air flow rate (17.5 cc/min) from one end face (first end face) to the other end face (second end face) in a state where air does not pass through the side face of the non-combustion heated tobacco 10. The unit is generally expressed in mmH ₂ O. It is known that the relationship between the airflow resistance and the length of the non-combustion heated tobacco is proportional in the length range usually used (length 5 mm to 200 mm), and if the length is doubled, the airflow resistance of the non-combustion heated tobacco is doubled.

[Mouthpiece section]
The configuration of the mouthpiece portion 14 is not particularly limited as long as it includes a cooling segment 12 and a filter segment 13 including a filter material, and is configured such that the cooling segment 12 is sandwiched adjacent to the tobacco rod portion 11 and the filter segment 13 in the axial direction of the non-combustion heat-not-burn tobacco 10. The filter segment and the cooling segment will be described in detail below.

(Filter Segment)
The filter segment 13 is not particularly limited as long as it includes a filter material and has a general filter function, and for example, a tow (also simply called "tow") made of synthetic fiber or a material such as paper processed into a cylindrical shape can be used. Examples of general functions of a filter include adjusting the amount of air mixed when inhaling aerosols, etc.; reducing flavor; reducing nicotine and tar; etc., but it is not necessary for the filter to have all of these functions. In addition, in electrically heated tobacco products, which tend to produce fewer components and have a lower tobacco filler filling rate compared to cigarette products, one of the important functions is to suppress the filtering function while preventing the tobacco filler from falling.

The shape of the filter segment 13 is not particularly limited, and any known shape can be adopted. Usually, the filter segment 13 can have a cylindrical shape, and can have the following forms.
Furthermore, the filter segment 13 may be provided with a section such as a cavity (such as a center hole) or a recess, the cross section of which is hollow (hollow) in the circumferential direction.

The cross-sectional shape of the filter segment 13 in the circumferential direction is substantially circular, and the diameter of the circle can be appropriately changed according to the size of the product, but is usually 4.0 mm or more and 9.0 mm or less, preferably 4.5 mm or more and 8.5 mm or less, and more preferably 5.0 mm or more and 8.0 mm or less. When the cross section is not circular, the above diameter is applied to a circle having the same area as the cross section.
The circumferential length of the circumferential cross-sectional shape of the filter segment 13 can be appropriately changed according to the size of the product, but is usually 14.0 mm or more and 27.0 mm or less, preferably 15.0 mm or more and 26.0 mm or less, and more preferably 16.0 mm or more and 25.0 mm or less.
The axial length of the filter segment 13 can be appropriately changed according to the size of the product, but is usually 15 mm or more and 35 mm or less, preferably 17.5 mm or more and 32.5 mm or less, and more preferably 20.0 mm or more and 30.0 mm or less. The shape and dimensions of the filter medium can be appropriately adjusted so that the shape and dimensions of the filter segment 13 are within the above ranges.

The airflow resistance per 120 mm of axial length of the filter segment 13 is not particularly limited, but is usually ₄₀ mmH2O or more and ₃₀₀ mmH2O or less, preferably ₇₀ mmH2O or more and 280 mmH2O or less, and more preferably _{90 mmH2O} or more and ₂₆₀ mmH2O or less.
The airflow resistance is measured according to the ISO standard method (ISO6565), for example, using a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of the filter segment 13 refers to the air pressure difference between the first end face and the second end face when air is flowed at a predetermined air flow rate (17.5 cc/min) from one end face (first end face) to the other end face (second end face) in a state where air does not pass through the side face of the filter segment 13. The unit is generally expressed in mmH ₂ O. It is known that the relationship between the airflow resistance of the filter segment 13 and the length of the filter segment 13 is proportional within the length range usually used (lengths of 5 mm to 200 mm), and if the length is doubled, the airflow resistance of the filter segment 13 doubles.

The filter material constituting the filter segment 13 may be, for example, one produced by the production method described below, or a commercially available product.
Furthermore, the embodiment of the filter segment 13 is not particularly limited, and may be a plain filter including a single filter medium; a multi-segment filter including a plurality of filter mediums, such as a dual filter or a triple filter; or the like.

The filter segment 13 can be produced by a known method, for example, when a synthetic fiber such as cellulose acetate tow is used as the material of the filter medium, the filter segment 13 can be produced by a method of spinning a polymer solution containing a polymer and a solvent and crimping the polymer solution. For example, the method described in WO 2013/067511 can be used as the method.
In manufacturing the filter segment 13, the adjustment of the airflow resistance and the addition of additives (known adsorbents and flavors (e.g., menthol), granular activated carbon, flavor retention materials, etc.) to the filter medium can be appropriately designed.

The form of the filter material constituting the filter segment 13 is not particularly limited, and any known form may be adopted, for example, cellulose acetate tow processed into a cylindrical shape. The single thread fineness and total fineness of the cellulose acetate tow are not particularly limited, but in the case of a mouthpiece part with a circumference of 22 mm, the single thread fineness is preferably 5 g/9000 m or more and 12 g/9000 m or less, and the total fineness is preferably 12000 g/9000 m or more and 35000 g/9000 m or less. Examples of the cross-sectional shape of the fiber of the cellulose acetate tow include a circular shape, an elliptical shape, a Y-shape, an I-shape, and an R-shape. In the case of a filter filled with cellulose acetate tow, triacetin may be added in an amount of 5% by weight or more and 10% by weight or less relative to the weight of the cellulose acetate tow in order to improve the filter hardness. In addition, a paper filter filled with sheet-shaped pulp paper may be used instead of the acetate filter.

The density of the filter medium is not particularly limited, but is usually 0.10 g/ ^cm3 or more and 0.25 g/ ^cm3 or less, preferably 0.11 g/ ^cm3 or more and 0.24 g/ ^cm3 or less, and more preferably 0.12 g/ ^cm3 or more and 0.23 g/ ^cm3 or less.

The filter medium may include a crushable additive release container (e.g., capsule) that includes a crushable shell such as gelatin, in addition to synthetic fibers such as cellulose acetate tow. The capsule (also called "additive release container" in the art) may have any known form, for example, a crushable additive release container that includes a crushable shell such as gelatin. In this case, when the capsule is broken by the tobacco product user before, during, or after use, it releases a liquid or substance (usually a flavoring agent) contained in the capsule, which is then transferred to tobacco smoke during use of the tobacco product, and transferred to the surrounding environment after use.
The form of the capsule is not particularly limited, and may be, for example, a frangible capsule, and its shape is preferably a sphere. The additive contained in the capsule may include any of the additives described above, and is preferably a flavoring agent or activated carbon. In addition, one or more materials that help filter smoke may be added as the additive. The form of the additive is not particularly limited, and is usually a liquid or solid. The use of capsules containing additives is well known in the art. Frangible capsules and methods for producing them are well known in the art.

The filter segment 13 may further include a center hole segment having one or more hollow portions. The center hole segment is usually disposed closer to the cooling segment than the filter medium, and preferably adjacent to the cooling segment.

The center hole segment is composed of a filling layer having one or more hollow parts and an inner plug wrapper (inner wrapping paper) that covers the filling layer. For example, the center hole segment is composed of a filling layer having a hollow part and an inner plug wrapper that covers the filling layer. The center hole segment has a function of increasing the strength of the mouthpiece part. The filling layer can be, for example, a rod with an inner diameter of φ1.0 mm or more and φ5.0 mm or less, in which cellulose acetate fibers are densely packed and a plasticizer containing triacetin is added to the cellulose acetate mass at 6% by mass or more and 20% by mass or less, and hardened. Since the filling layer has a high fiber packing density, air and aerosol flow only through the hollow parts during inhalation and hardly flow inside the filling layer. Since the filling layer inside the center hole segment is a fiber packing layer, the touch from the outside during use is less likely to cause discomfort to the user. The center hole segment may not have an inner plug wrapper and its shape may be maintained by thermoforming.

The center hole segment and the filter medium may be connected, for example, by an outer plug wrapper (outer wrapping paper). The outer plug wrapper may be, for example, a cylindrical paper. The tobacco rod portion 11, the cooling segment 12, and the connected center hole segment and filter medium may be connected, for example, by a mouthpiece lining paper. These connections can be made, for example, by applying a glue such as a vinyl acetate glue to the inner surface of the mouthpiece lining paper, and then inserting and winding the tobacco rod portion 11, the cooling segment 12, and the connected center hole segment and filter medium. These may be connected in multiple separate instances using multiple lining papers.

From the viewpoint of improving strength and structural rigidity, the filter segment 13 may be provided with a wrapper (filter plug wrapper) for wrapping the above-mentioned filter medium and the like. The form of the wrapper is not particularly limited, and may include one or more rows of seams containing adhesive. The adhesive may include a hot melt adhesive, and the hot melt adhesive may further include polyvinyl alcohol. In addition, when the filter segment 13 is composed of two or more segments, it is preferable that the wrapper wraps these two or more segments together.
The material of the wrapper is not particularly limited, and any known material can be used, which may contain a filler such as calcium carbonate.
The thickness of the wrapper is not particularly limited, and is usually from 20 μm to 140 μm, preferably from 30 μm to 130 μm, and more preferably from 30 μm to 120 μm.
The basis weight of the roll is not particularly limited, and is usually from 20 gsm to 100 gsm, preferably from 22 gsm to 95 gsm, and more preferably from 23 gsm to 90 gsm.
Furthermore, the wrapper may be either coated or uncoated, but is preferably coated with a desired material from the standpoint of imparting functions other than strength and structural rigidity.

(Cooling segment)
The cooling segment 12 is sandwiched adjacent to the tobacco rod portion 11 and the filter segment 13, and is usually a rod-shaped member having a cavity such that the cross section in the circumferential direction is hollow (hollow), such as a cylinder.
The cooling segment 12 may be provided with openings V (also referred to as "ventilation filters (Vf)" in the present technical field) in the circumferential direction and concentrically, as shown in Fig. 2. Note that, although eight openings V are arranged concentrically in Fig. 2, the number of openings V is not limited to this. In addition, the openings V may be present in a region 2 mm or more from the boundary between the cooling segment 12 and the filter segment 13 toward the cooling segment side.
The presence of the openings V allows air to flow from the outside into the cooling section during use, lowering the temperature of the components and air flowing in from the tobacco rod section 11. Furthermore, by providing the openings V within a region 4 mm or more from the boundary between the cooling segment 12 and the filter segment 13 toward the cooling segment, not only is the cooling capacity improved, but the retention of components generated by heating in the cooling segment is suppressed, improving the delivery amount of the components.
In addition, when an aerosol base material is used in the tobacco rod portion 11, vapor containing the aerosol base material and tobacco flavor components generated by heating the tobacco rod portion 11 comes into contact with air from the outside and drops in temperature, thereby liquefying, thereby promoting the generation of an aerosol.
Furthermore, when the concentrically arranged holes V are treated as one hole group, the hole group may be one or may be two or more. When two or more hole groups are present, from the viewpoint of improving the delivery amount of the component generated by heating, it is preferable that no hole group is provided in a region less than 4 mm from the boundary between the cooling segment 12 and the filter segment 13 toward the cooling segment side.
Furthermore, when the non-combustion heat-not-burn tobacco 10 is configured such that the tobacco rod portion 11, the cooling segment 12, and the filter segment 13 are wrapped with tipping paper 15, it is preferable that the tipping paper 15 has an opening immediately above the opening V provided in the cooling segment 12. When producing such a non-combustion heat-not-burn tobacco 10, a tipping paper 15 having an opening that overlaps with the opening V may be prepared and wound, but from the viewpoint of ease of production, it is preferable to produce the non-combustion heat-not-burn tobacco 10 using a cooling segment 12 that does not have an opening V, and then to open a hole that passes through both the cooling segment 12 and the tipping paper 15 at the same time.

The openings V are preferably provided so that the proportion of air flowing in from the openings when inhaling at 17.5 ml/sec with an automatic smoking machine (the volume proportion of air flowing in from the openings when the proportion of air inhaled from the mouth end is taken as 100 volume%) is 10 to 90 volume%, preferably 50 to 80 volume%, more preferably 55 to 75 volume%. For example, this can be achieved by selecting the number of openings V per opening group from the range of 5 to 50, selecting the diameter of the openings V from the range of 0.1 to 0.5 mm, and combining these selections.
The air inflow ratio can be measured using an automatic smoking machine (for example, a single-cigarette automatic smoking machine manufactured by Borgwaldt) according to a method in accordance with ISO9512.

The region in which the openings V exist is not particularly limited, but from the viewpoint of improving the delivery of components generated by heating, it is preferably a region of 2 mm or more in the direction from the boundary between the cooling segment 12 and the filter segment 13 toward the cooling segment, more preferably a region of 3 mm or more, even more preferably a region of 4 mm or more, particularly preferably a region of 5 mm or more, and most preferably a region of 5.5 mm or more, and from the viewpoint of ensuring the cooling function, it is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 6 mm or less.
From the viewpoint of improving the delivery of components generated by heating, the area in which the openings V exist is preferably an area of 22 mm or more from the mouth end of the non-combustion heated tobacco toward the cooling segment, preferably 23 mm or more, more preferably 24 mm or more, more preferably 25 mm or more, and even more preferably 25.5 mm or more; and from the viewpoint of ensuring the cooling function, it is preferably 35 mm or less, more preferably 30 mm or less, and even more preferably 26 mm or less.
Furthermore, when considering the boundary between the cooling segment 12 and the tobacco rod portion 11 as a reference, when the axial length of the cooling segment 12 is 20 mm or more, from the viewpoint of ensuring the cooling function, the region in which the opening V exists is preferably a region extending from the boundary between the cooling segment 12 and the tobacco rod portion 11 toward the cooling segment by 2 mm or more, more preferably 5 mm or more, even more preferably 10 mm or more, and particularly preferably 14.5 mm or more, and from the viewpoint of improving the delivery of the components generated by heating, it is preferably 18 mm or less, more preferably 16 mm or less, and even more preferably 14.5 mm or less.

The diameter of the opening V is not particularly limited, but is preferably 100 μm or more and 1000 μm or less, more preferably 100 μm or more and 500 μm or less, and even more preferably 300 μm or more and 800 μm or less. The opening V is preferably approximately circular or approximately elliptical, and in the case of an approximately elliptical shape, the diameter represents the major axis.

The length of the cooling segment 12 in the major axis direction can be appropriately changed according to the size of the product, but is usually 15 mm or more, preferably 20 mm or more, more preferably 25 mm or more, and is usually 40 mm or less, preferably 35 mm or less, more preferably 30 mm or less. By setting the length of the cooling segment 12 in the major axis direction to the above lower limit or more, a sufficient cooling effect can be ensured to obtain a good flavor, and by setting it to the above upper limit or less, loss due to adhesion of the generated steam and aerosol to the inner wall of the cooling segment can be suppressed.
When a sheet or the like for cooling is filled in the cooling segment 12, the total surface area of the cooling segment 12 is not particularly limited and may be, for example, 300 ^mm2 /mm or more and 1000 ^mm2 /mm or less. This surface area is the surface area per mm of the length (mm) in the air passage direction of the cooling segment 12. The total surface area of the cooling segment 12 is preferably ⁴⁰⁰ mm2/mm or more, more preferably ⁴⁵⁰ mm2/mm or more, while it is preferably ⁶⁰⁰ mm2/mm or less, and more preferably 550 ^mm2 /mm or less.

It is desirable for the cooling segment 12 to have a large total surface area for its internal structure. Thus, in a preferred embodiment, the cooling segment 12 may be formed by a thin sheet of material that is wrinkled to form channels, and then pleated, gathered, and folded. The more folds or pleats within a given volume of the element, the greater the total surface area of the cooling segment.

The thickness of the constituent material of the cooling segment 12 is not particularly limited and may be, for example, 5 μm or more and 500 μm or less, or 10 μm or more and 250 μm or less.

[Tobacco rod part]
The tobacco rod portion 11 is not particularly limited in its configuration as long as it contains dried tobacco leaves and a flavor-containing material in which a flavor is contained in a polysaccharide gel, and is usually configured by wrapping a tobacco filler containing dried tobacco leaves in cigarette paper. The tobacco filler is not particularly limited, and the first tobacco filler, the second tobacco filler, or the third tobacco filler described below can be used. In this specification, molded products of dried tobacco such as tobacco shreds, tobacco sheets, tobacco granules, etc. described below may be simply referred to as "dried tobacco leaves". The tobacco rod portion 11 may also have a fitting portion with a heater member or the like for heating the tobacco product.
The tobacco rod portion 11, which is formed by wrapping a tobacco filler in cigarette paper, preferably has a columnar shape, and in this case, it is preferable that the aspect ratio, represented by the height of the tobacco rod portion 11 in the longitudinal direction relative to the width of the bottom surface of the tobacco rod portion 11, is 1 or greater.
The shape of the bottom surface is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc., and the width is the diameter when the bottom surface is circular, the major axis when the bottom surface is elliptical, and the diameter of the circumscribing circle or the major axis of the circumscribing ellipse when the bottom surface is polygonal or rounded polygonal. The height of the tobacco filler constituting the tobacco rod portion 11 is preferably about 10 mm to 70 mm, and the width is preferably about 4 mm to 9 mm.
The length of the tobacco rod portion 11 in the longitudinal direction may be appropriately changed according to the size of the product, but is usually 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and even more preferably 18 mm or more, and is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less.
In addition, the ratio of the length of the tobacco rod portion 11 to the length h of the non-combustion heated tobacco 10 in the longitudinal direction is not particularly limited, but from the standpoint of the balance between the delivery amount and the aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more, and is usually 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less, from the standpoint of the balance between the delivery amount and the aerosol temperature.

The content of dried tobacco leaves in the tobacco rod portion 11 is not particularly limited, but may be 200 mg/rod portion or more and 800 mg/rod portion or less, and preferably 250 mg/rod portion or more and 600 mg/rod portion or less. This range is particularly suitable for a tobacco rod portion having a circumference of 22 mm and a length of 20 mm.

(Fragrance-Containing Materials)
The flavor-containing material is a material in which a flavor is contained in a polysaccharide gel, and by blending the flavor-containing material in the tobacco rod portion 11, the variation in the amount of flavor delivered per puff is suppressed from the early to late stages of smoking, and a good flavor can be continuously obtained. The inventors speculate that the reason for this is as follows. First, a non-combustion heat-not-burn tobacco is inserted into an electric heating device and preheated for a certain period of time before smoking begins. When a flavor is directly blended in the tobacco rod portion 11, the flavor volatilizes during preheating, and most of it is delivered in the early stages of smoking, so that the amount of flavor delivered in the later stages of smoking is considered to be insufficient. In contrast, when a flavor-containing material is blended in the tobacco rod portion 11, the flavor is covered with a polysaccharide gel, so that the volatilization of the flavor during preheating is suppressed, and the flavor is gradually released during smoking. Therefore, it is speculated that a sufficient amount of flavor can be delivered even in the later stages of smoking.
The components of the fragrance-containing material will be described below.

The type of fragrance is not particularly limited, and from the viewpoint of imparting a good fragrance tone, the following may be used: acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peru balsam oil, beeswax absolute, benzaldehyde, benzoin resinoid, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, β-caramel, glyceryl stearate ... Rotene, carrot juice, L-carvone, β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL-citronellol, clary sage extract, cocoa, coffee, konjac oil, coriander oil, cuminaldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one, 3,7- Dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, ethyl stearate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy-4-methyl-2( 5H)-Furanone, 2-ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, gamma-heptalactone, gamma-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, phenylhexyl acetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5,5-trimethyl-2-cyclohexen-1-one , 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, immortelle absolute, β-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lovage root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, paramethoxybenzaldehyde, methyl-2-pyrrolyl ketone, anthranil. Methyl phenylacetate, Methyl salicylate, 4'-methylacetophenone, Methylcyclopentenolone, 3-methylvaleric acid, Mimosa absolute, Honey fruit, Myristic acid, Nerol, Nerolidol, γ-nonalactone, Nutmeg oil, δ-octalactone, Octanal, Octanoic acid, Orange flower oil, Orange oil, Orris root oil, Palmitic acid, ω-pentadecalactone, Peppermint oil, Petitgrain Paraguay oil, Phenethyl alcohol, Phenethyl phenylacetate, Phenylacetic acid, Piperonal, Plum extract, Propenyl guaethol, Propylene acetate propyl, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, marigold oil, tea distillate, alpha-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo(8.3.0.0(4.9))tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6-trimethyl 2-(2,6,6-trimethyl-1,3-cyclohexadienyl)-2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclohexadienyl)-2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin, veratraldehyde, violet leaf absolute, N-ethyl-p-menthane-3-carboxamide (WS-3), ethyl-2-(p-menthane-3-carboxamide)acetate (WS-5), etc., and menthol is particularly preferred. These flavorings may be used alone or in combination of two or more.

The content of fragrance in the fragrance-containing material varies depending on the type of fragrance, the type of polysaccharide, etc., but is usually 18% by mass or more, preferably 50% by mass or more, more preferably 60% by mass or more, and is usually 90% by mass or less, preferably 80% by mass or less.

The type of polysaccharide is not particularly limited, but is preferably a single-component system of carrageenan, agar, gellan gum, tamarind gum, psyllium seed gum, or konjac glucomannan; or a composite system of two or more components selected from the group consisting of carrageenan, locust bean gum, guar gum, agar, gellan gum, tamarind gum, xanthan gum, tara gum, konjac glucomannan, starch, cassia gum, and psyllium seed gum. These polysaccharides are preferred in that they gel simply by heating to 30°C to 90°C in an aqueous solution, so that no gelling agent such as a metal chloride is required when preparing the flavor-containing material, and they do not generate undesirable components such as chloride decomposition products in the mainstream smoke during smoking.

The fragrance-containing material may contain an emulsifier used to emulsify the raw materials during preparation. The type of emulsifier is not particularly limited, and examples include lecithin, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, propylene glycol fatty acid ester, sucrose fatty acid ester, etc., and lecithin is preferred. These emulsifiers may be used alone or in combination of two or more.

The method for preparing the fragrance-containing material is not particularly limited, and the material can be prepared by a method similar to a known method. Known methods include those described in WO 2011/118040, JP 2013-099349, WO 2012/118034, etc. More specifically, the fragrance-containing material can be prepared, for example, by a method including the following steps (i) and (ii).
(i) preparing an aqueous solution of a polysaccharide by heating a mixture of a polysaccharide and water to a temperature of typically 30°C to 90°C, preferably 60°C to 90°C; and (ii) adding a flavoring and, if necessary, an emulsifier to the aqueous solution and kneading the mixture to obtain an emulsion slurry.

The content of the flavor-containing material in the tobacco rod portion 11 depends on the flavor content in the flavor-containing material, but is usually 1% by mass or more, preferably 5% by mass or more, and usually 20% by mass or less, preferably 10% by mass or less, relative to the dry tobacco leaves.
The tobacco rod portion 11 also contains a flavor-containing material such that the content of flavor contained in the flavor-containing material is usually 1 mg or more, preferably 5 mg or more, more preferably 10 mg or more, and is usually 30 mg or less , preferably 20 mg or less.
By setting the content of the flavor-containing material in the tobacco rod portion 11 within the above range, not only can a good fragrance be imparted, but also the variation in the amount of flavor delivered per puff from the early to late stages of smoking can be suppressed, and a sufficient delivery amount can be ensured in all stages of smoking, from the early, middle, and late stages.

The manner in which the flavor-containing material is blended into the tobacco rod portion 11 is not particularly limited, and the flavor-containing material may be placed on the inside and/or outside of the cigarette paper that wraps the tobacco filler, the cigarette paper may be impregnated with the flavor-containing material, or the flavor-containing material may be blended into the tobacco filler.
When the flavor-containing material is disposed on the inside and/or outside of a cigarette paper that wraps a tobacco filler, the emulsion slurry may be applied to the cigarette paper, or the emulsion slurry may be successively cast on a substrate and dried to form a flavor-containing sheet, which is then wrapped with the cigarette paper. The cigarette paper impregnated with the flavor-containing material may be produced by impregnating the cigarette paper with the emulsion slurry and drying it. When the flavor-containing material is to be incorporated into the tobacco filler, the emulsion slurry may be applied to or impregnated into dried tobacco leaves, or the flavor-containing sheet or its shredded or pulverized form may be mixed with dried tobacco.

(Tobacco filling)
(1) First Tobacco Filler First, the first tobacco filler (simply referred to as the "first filling") will be described. The first tobacco filler is composed of tobacco shreds. The material of the tobacco shreds contained in the first filling is not particularly limited, and known materials such as lamina and ribs can be used. Alternatively, the tobacco shreds may be made by crushing dried tobacco leaves to an average particle size of 20 μm or more and 200 μm or less to obtain tobacco shreds, which are homogenized and processed into a sheet (hereinafter simply referred to as a homogenized sheet). Furthermore, the tobacco rod may be filled with a homogenized sheet having a length approximately equal to the longitudinal direction of the tobacco rod, which is shredded approximately horizontally to the longitudinal direction of the tobacco rod, to form a so-called strand type.
In addition, the width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less, and the length is preferably 3.0 mm or more and 10.0 mm or less, in order to fill the tobacco rod.

Regarding the tobacco leaves used for the preparation of the tobacco shreds and homogenized sheet, various types of tobacco can be used. For example, flue-cured tobacco, burley, orient, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof can be mentioned. As for the mixture, the above varieties can be appropriately blended to achieve the desired taste. Details of the tobacco varieties are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009". There are several conventional methods for producing the homogenized sheet, that is, the method for grinding tobacco leaves and processing them into a homogenized sheet. The first method is to produce a paper-making sheet using a papermaking process. The second method is to mix an appropriate solvent such as water with the ground tobacco leaves to homogenize them, and then cast the homogenized material thinly on a metal plate or metal plate belt and dry it to produce a cast sheet. The third method is to mix an appropriate solvent such as water with the ground tobacco leaves to homogenize them, and extrude them into a sheet to produce a rolled sheet. The types of the homogenizing sheets are disclosed in detail in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

The first tobacco filler preferably contains a flavor-containing material. In this case, from the viewpoint of easily achieving the effects of the present invention, it is preferable that the flavor-containing material is uniformly mixed with the tobacco shreds and contained in the first tobacco filler.
The method of incorporating the flavor-containing material into the first tobacco filling is not particularly limited, but examples thereof include a method of applying or impregnating a homogenizing sheet or tobacco shreds with the emulsion slurry; a method of mixing shredded flavor-containing sheets with tobacco shreds; and the like. The method of mixing shredded flavor-containing sheets with tobacco shreds is preferred in that the manufacturing process is simple. In addition, in this case, if shredded flavor-containing sheets cut to the same size as the tobacco shreds are used, it is preferable because the shredded flavor-containing sheets can be easily mixed uniformly with the tobacco shreds.

The first tobacco filling may contain a flavoring in addition to the flavoring-containing material (hereinafter, a flavoring contained in the flavoring-containing material may be referred to as "flavoring A" and a flavoring not contained in the flavoring-containing material may be referred to as "flavoring B" to distinguish them), to the extent that the effects of the present invention are not impaired. Examples of flavoring B include the same flavorings as flavoring A contained in the flavoring-containing material, and the preferred embodiments are also the same.

The content of flavor B in the first tobacco filling is not particularly limited as long as it does not interfere with the effects of the present invention, and is, for example, such that the total amount of flavor A and flavor B in the first tobacco filling is typically 10,000 ppm or more, preferably 20,000 ppm or more, more preferably 25,000 ppm or more, and typically 70,000 ppm or less, preferably 50,000 ppm or less, more preferably 40,000 ppm or less, and even more preferably 33,000 ppm or less.

The moisture content of the first tobacco filler is, for example, 10% by weight or more and 15% by weight or less, and preferably 11% by weight or more and 13% by weight or less, based on the total amount of the first tobacco filler. Such a moisture content suppresses the occurrence of rolling stains and improves the suitability for rolling during the production of a tobacco rod.
There are no particular limitations on the size of the tobacco shreds contained in the first tobacco filler or the method for preparing the same. For example, dried tobacco leaves shredded to a width of 0.5 mm or more and 2.0 mm or less may be used.
In addition, when using ground material for a homogenized sheet, dried tobacco leaves may be ground to an average particle size of about 20 μm to 200 μm, homogenized, processed into a sheet, and then chopped into a width of 0.5 mm or more and 2.0 mm or less.

The first tobacco filling may include an aerosol base for generating aerosol smoke. The type of the aerosol base is not particularly limited, and various extracts from natural products and/or their components may be selected depending on the application. Examples of the aerosol base include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.
The content of the aerosol base material in the first tobacco filling material is not particularly limited, and from the viewpoint of generating sufficient aerosol and imparting a good flavor, it is usually 5% by weight or more, preferably 10% by weight or more, and usually 50% by weight or less, preferably 15% by weight or more and 25% by weight or less, relative to the total amount of the first tobacco filling material.

The filling density of the first tobacco filling material is not particularly limited, but from the viewpoint of ensuring the performance of the non-combustion heated tobacco and imparting a good flavor, it is usually 250 mg/ ^cm3 or more, preferably 300 mg/ ^cm3 or more, and usually 400 mg/ ^cm3 or less, preferably 350 mg/ ^cm3 or less.
The first tobacco filler is wrapped in cigarette paper so that the first tobacco filler is on the inside to form a tobacco rod portion 11.

(2) Second Tobacco Filler The second tobacco filler is composed of a tobacco sheet filled in a filler. The number of tobacco sheets may be one, or two or more.

In the case where the second tobacco filling is composed of a single tobacco sheet, for example, a tobacco sheet with one side having a length approximately equal to the longitudinal direction of the filling is folded multiple times horizontally to the longitudinal direction of the filling (so-called gathered sheet) is included. Another example is a tobacco sheet with one side having a length approximately equal to the longitudinal direction of the filling, wound in a direction perpendicular to the longitudinal direction of the filling.

In the case where the second tobacco filling is composed of two or more tobacco sheets, for example, multiple tobacco sheets, one side of which has a length approximately equal to the longitudinal direction of the filling, are packed in a wound state in a direction perpendicular to the longitudinal direction of the filling so that they are arranged concentrically.
The term "concentrically arranged" refers to the arrangement in which the centers of all the tobacco sheets are located at approximately the same position. The number of tobacco sheets is not particularly limited, but examples include embodiments in which the number of tobacco sheets is 2, 3, 4, 5, 6, or 7.
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 thicknesses of the tobacco sheets may be the same or different.

The second tobacco filler can be produced by preparing a plurality of tobacco sheets of different widths, stacking them together so that the width decreases from the bottom to the top, and passing this through a winding tube to roll and shape it.
According to this manufacturing method, the plurality of tobacco sheets extend in the longitudinal direction and are arranged concentrically about the longitudinal axis, and a fitting portion extending in the longitudinal direction may be formed between the longitudinal axis and the innermost tobacco sheet.

In this manufacturing method, the laminate is preferably prepared so that a non-contact portion is formed between adjacent tobacco sheets after rolling. If there is a non-contact portion (gap) between multiple tobacco sheets where the tobacco sheets are not in contact, a flavor flow path can be secured to improve the delivery efficiency of the flavor components. On the other hand, when the tobacco product is used in an electrically heated tobacco product, heat from a heater can be transferred to the outer tobacco sheet via the contact portion between multiple tobacco sheets, ensuring high heat transfer efficiency.
In order to provide non-contact portions between multiple tobacco sheets where the tobacco sheets do not come into contact, for example, methods include using an embossed tobacco sheet, laminating adjacent tobacco sheets without bonding their entire surfaces together, laminating adjacent tobacco sheets by bonding only a portion of the sheets together, or laminating adjacent tobacco sheets by lightly bonding their entire surfaces or a portion of the sheets together so that they can be peeled off after rolling and molding, thereby preparing a laminate.
When preparing a tobacco rod including cigarette paper, the cigarette paper may be placed at the bottom of the layered product.
Alternatively, the fitting portion can be formed by placing a cylindrical dummy such as a mandrel on the top of the laminate to form the second tobacco filler, and then removing the dummy.

The filling density of the second tobacco filling material is not particularly limited, but from the viewpoint of ensuring the performance of the tobacco product and imparting a good flavor, it is usually 250 mg/ ^cm3 or more, preferably 300 mg/ ^cm3 or more, and usually 400 mg/ ^cm3 or less, preferably 350 mg/ ^cm3 or less.

The second tobacco filling preferably contains a flavor-containing material. Specifically, the flavor-containing material is preferably blended into the second tobacco filling by using a tobacco sheet coated or impregnated with the above-mentioned emulsion slurry, or by rolling up the tobacco sheet with a flavor-containing sheet or its shredded or crushed material.

The second tobacco filling may contain flavor B to the extent that it does not impair the effects of the present invention. Examples of flavor B include the same as flavor A, and the preferred embodiments are also the same.

The content of flavor B in the second tobacco filling is not particularly limited as long as it does not interfere with the effects of the present invention, and is, for example, such that the total amount of flavor A and flavor B in the second tobacco filling is typically 10,000 ppm or more, preferably 20,000 ppm or more, more preferably 25,000 ppm or more, and typically 70,000 ppm or less, preferably 50,000 ppm or less, more preferably 40,000 ppm or less, and even more preferably 33,000 ppm or less.

The tobacco sheet may contain an aerosol base material that generates aerosol smoke when heated. An aerosol source such as glycerin, propylene glycol, or a polyol such as 1,3-butanediol is added as the aerosol base material. The amount of such aerosol base material added is preferably 5% by weight or more and 50% by weight or less, and more preferably 15% by weight or more and 25% by weight or less, based on the dry weight of the tobacco sheet.

The tobacco sheet can be appropriately produced by a known method such as papermaking, slurry, rolling, etc. The homogenized sheet described in the first tobacco filler can also be used.
In the case of papermaking, tobacco can be produced by a method including the following steps: 1) Dried tobacco leaves are roughly crushed and extracted with water to separate the water extract and residue. 2) The water extract is dried under reduced pressure and concentrated. 3) Pulp is added to the residue, which is then fiberized in a refiner and made into paper. 4) A concentrated liquid of the water extract is added to the paper-made sheet and dried to produce a tobacco sheet. In this case, a step of removing some components such as nitrosamines may be added (see JP-T 2004-510422).
In the case of the slurry method, the tobacco leaf can be produced by a method including the following steps: 1) mixing water, pulp, a binder, and crushed tobacco leaves; 2) spreading (casting) the mixture thinly and drying. In this case, a step of removing some of the components such as nitrosamines by irradiating the slurry of the water, pulp, binder, and crushed tobacco leaves with ultraviolet light or X-rays may be added.

Alternatively, as described in WO 2014/104078, a nonwoven tobacco sheet may be used that is manufactured by a method that includes the following steps: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) forming the laminate into a certain shape by thermal welding to obtain a nonwoven tobacco sheet.
The type of tobacco leaf material used in each of the above-mentioned methods can be the same as that explained for the first filling material.
The composition of the tobacco sheet is not particularly limited, but for example, the content of the tobacco raw material (tobacco leaves) is preferably 50% by weight or more and 95% by weight or less with respect to the total weight of the tobacco sheet. The tobacco sheet may also contain a binder, and examples of such binders include guar gum, xanthan gum, CMC (carboxymethylcellulose), CMC-Na (sodium salt of carboxymethylcellulose), and the like. The amount of the binder is preferably 1% by weight or more and 10% by weight or less with respect to the total weight of the tobacco sheet. The tobacco sheet may further contain other additives. Examples of the additives include fillers such as pulp. In this embodiment, a plurality of tobacco sheets are used, and the 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.

There are no restrictions on the thickness of each tobacco sheet, but in terms of the balance between heat transfer efficiency and strength, a thickness of 150 μm or more and 1000 μm or less is preferable, and a thickness of 200 μm or more and 600 μm or less is more preferable. The thicknesses of each tobacco sheet may be the same or different.

(3) Third Tobacco Filler The third tobacco filler is composed of tobacco granules.
The raw materials of the third tobacco filler are not particularly limited, but may include (a) ground tobacco material, (b) moisture, (c) at least one pH adjuster selected from the group consisting of potassium carbonate and sodium bicarbonate, and (d) at least one binder selected from the group consisting of pullulan and hydroxypropyl cellulose.

The ground tobacco material (component (a)) contained in the third tobacco filler includes ground tobacco leaves, ground tobacco sheets, etc. Types of tobacco include Burley, flue, and Oriental. The tobacco material is preferably ground to a size of 200 μm or more and 300 μm or less.
The raw material mixture for the third tobacco filler typically contains ground tobacco material in an amount of not less than 20% by weight and not more than 80% by weight.

The third tobacco filler preferably contains a flavor-containing material. In this case, from the viewpoint of easily achieving the effects of the present invention, it is preferable that the flavor-containing material is uniformly mixed with the tobacco shreds and contained in the third tobacco filler.
The method of incorporating the flavor-containing material into the third tobacco filling material is not particularly limited, but examples thereof include a method of blending the emulsion slurry or pulverized flavor-containing sheet with the raw material of tobacco granules; a method of mixing the pulverized flavor-containing sheet with tobacco granules; etc. The method of mixing the pulverized flavor-containing sheet with tobacco granules is preferred in that the manufacturing process is simple. In addition, in this case, if the pulverized flavor-containing sheet is pulverized to the same size as the tobacco granules, it is preferable to use the pulverized flavor-containing sheet, since it is easy to uniformly mix the pulverized flavor-containing sheet with the tobacco granules.

The third tobacco filling may contain flavor B to the extent that it does not impair the effects of the present invention. Examples of flavor B include the same as flavor A, and the preferred embodiments are also the same.

The content of flavor B in the third tobacco filling is not particularly limited as long as it does not interfere with the effects of the present invention, and is, for example, such that the total amount of flavor A and flavor B in the third tobacco filling is typically 10,000 ppm or more, preferably 20,000 ppm or more, more preferably 25,000 ppm or more, and typically 70,000 ppm or less, preferably 50,000 ppm or less, more preferably 40,000 ppm or less, and even more preferably 33,000 ppm or less.

The moisture (component (b)) contained in the third tobacco filling is intended to maintain the integrity of the tobacco granules.
The raw material mixture of the third tobacco filler typically contains moisture in an amount of 3% by weight or more and 13% by weight or less. The third tobacco filler may also typically contain moisture in an amount of 5% by weight or more and 17% by weight or less in terms of loss on drying. Loss on drying refers to the change in weight before and after drying when a part of a sample is taken for measurement and the sample is completely dried by evaporating all the moisture in the taken sample (for example, when dried for 15 minutes at a constant temperature (105°C)), and specifically refers to the ratio (wt%) of the combined amount of the moisture content of the sample and the amount of the volatile components that volatilize under the above drying conditions to the weight of the sample. That is, loss on drying (wt%) can be expressed by the following formula:
Loss on drying (wt%) = {(weight of sample before complete drying) - (weight of sample after complete drying)} x 100 / weight of sample before complete drying

The pH adjuster (component (c)) contained in the third tobacco filling comprises potassium carbonate, sodium bicarbonate or a mixture thereof. These pH adjusters adjust the pH of the third tobacco filling to the alkaline side, thereby promoting the release of flavor components contained in the third tobacco filling from the tobacco granules, and providing a flavor that is satisfactory to users.
The raw material mixture for the third tobacco filling may contain a pH adjuster, usually in an amount of 5% by weight or more and 20% by weight or less.

The binder (component (d)) contained in the third tobacco filler binds the tobacco granule components together to maintain the integrity of the tobacco granules. The binder is composed of pullulan, hydroxypropyl cellulose (HPC) or a mixture thereof.
The raw material mixture for the third tobacco filler may contain a binder, usually in an amount of not less than 0.5% by weight and not more than 15% by weight.

The third tobacco filling may consist of components (a), (b), (c) and (d) above, but may further include additional components.
Additional components include an aerosol base (component (e)). The aerosol base generates an aerosol smoke. The aerosol base is composed of a polyhydric alcohol, which may include glycerin, propylene glycol, sorbitol, xylitol, and erythritol. These polyhydric alcohols may be used alone or in combination of two or more.
When the raw material mixture of the third tobacco filler contains an aerosol base, it may contain it in an amount of 5 to 15% by weight.
The additional ingredients include (f) flavoring materials (solid or liquid) other than the flavoring ingredients. Such flavoring materials include sugar (sucrose, fructose, etc.), cocoa powder, carob powder, coriander powder, licorice powder, orange peel powder, rose pip powder, chamomile flower powder, lemon verbena powder, peppermint powder, leaf powder, spearmint powder, black tea powder, menthol, etc. These flavoring materials can be used alone or in combination of two or more kinds.
The raw material mixture for the third tobacco filler may contain the flavoring material in an amount of not less than 0.5% by weight and not more than 30% by weight. The flavoring material may be added to components (a), (b), (c), (d) and (e) by directly kneading the flavoring material with the components, or may be added to the components by supporting the flavoring material in a known inclusion host compound such as cyclodextrin to prepare an inclusion compound and then kneading the inclusion compound with the components.
When the third tobacco filling consists of the above components (a), (b), (c), (d) and (e), the raw material mixture of the third tobacco filling may typically contain component (a) in an amount of about 33% by weight or more (about 90% by weight or less).

The third tobacco filler is obtained by mixing components (a), (c), and (d) and, if desired, components (e) and (f), adding component (b) to the mixture and kneading the mixture, granulating the resulting kneaded mixture (in a long columnar shape) in a wet extrusion granulator, and then regulating the granules into a short columnar or spherical shape. The average particle size (D50) of the resulting tobacco granules is usually 0.2 mm or more and 1.2 mm or less, preferably 0.2 mm or more and 1.0 mm or less, and more preferably 0.2 mm or more and 0.8 mm or less.
In extrusion granulation, it is preferable to extrude the kneaded material at ambient temperature and at a pressure of 2 kN or more. This high-pressure extrusion causes the temperature of the kneaded material at the outlet of the extrusion granulator to rise instantaneously from ambient temperature to, for example, 90 to 100°C, and moisture and volatile components evaporate by 2% by weight or more and 4% by weight or less. Therefore, the amount of water blended to prepare the kneaded material can be greater than the desired moisture content in the tobacco granules, which are the final product, by the amount of evaporation described above.

The tobacco granules obtained by extrusion granulation may be further dried as necessary to adjust the moisture content. For example, if the loss on drying of the tobacco granules obtained by extrusion granulation is measured and is higher than the desired loss on drying (e.g., 5% by weight or more and 17% by weight or less), the tobacco granules may be further dried to obtain the desired loss on drying. The drying conditions (temperature and time) for obtaining the desired loss on drying can be determined in advance as the drying conditions (temperature and time) required to reduce the loss on drying by a predetermined value, and set based on those conditions.

The third tobacco filling material may consist only of the tobacco granules described above, but may also contain additional tobacco materials. The additional tobacco materials are usually shredded or finely powdered tobacco leaves. The additional tobacco materials may be used in a mixture with the tobacco granules.

(Scrolling paper)
The composition of the cigarette paper is not particularly limited and may be a common embodiment, for example, a cigarette paper mainly composed of pulp. The pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing with non-wood pulp generally used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto.
As the type of pulp, chemical pulp produced by the kraft cooking method, acidic/neutral/alkaline sulfite cooking method, soda salt cooking method, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. can be used.

The above pulp is used in the papermaking process using a Fourdrinier papermaking machine, a cylinder papermaking machine, a combined cylinder and short-circuit papermaking machine, etc., to adjust and homogenize the texture of the paper to produce a cigarette paper. If necessary, a wet strength agent can be added to impart water resistance to the cigarette paper, or a sizing agent can be added to adjust the printing condition of the cigarette paper. In addition, papermaking internal additives such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention improvers, drainage improvers, and paper strength enhancers, as well as papermaking additives such as dyes, pH adjusters, defoamers, pitch control agents, and slime control agents can be added.

The basis weight of the cigarette paper base paper is, for example, usually 20 gsm or more, preferably 25 gsm or more, whereas the basis weight is usually 65 gsm or less, preferably 50 gsm or less, more preferably 45 gsm or less.
The thickness of the cigarette paper having the above-mentioned characteristics is not particularly limited, and from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking, it is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more, and is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.
The shape of the cigarette paper for the non-combustion heating tobacco can be, for example, square or rectangular.
When used as cigarette paper for wrapping a tobacco filler (for producing a tobacco rod portion), the length of one side can be about 12 mm to 70 mm, the length of the other side can be 15 mm to 28 mm, the preferred length of the other side can be 22 mm to 24 mm, and the more preferred length can be about 23 mm. When wrapping a tobacco filler in cigarette paper in a cylindrical shape, for example, the end of the cigarette paper in the w direction and the end on the opposite side are overlapped by about 2 mm and glued together to form a cylindrical paper tube shape in which the tobacco filler is filled. The size of the rectangular cigarette paper can be determined depending on the size of the completed tobacco rod portion 11.
In the case of a wrapping that connects the tobacco rod portion 11 and another member adjacent to the tobacco rod portion 11, such as tipping paper, the length of one side may be 20 mm to 60 mm, and the length of the other side may be 15 mm to 28 mm.

In addition to the pulp, the cigarette paper may contain a filler. The content of the filler is, for example, 10% by weight or more and less than 60% by weight, preferably 15% by weight or more and 45% by weight or less, based on the total weight of the cigarette paper.
In the cigarette paper, within the preferred range of basis weight (25 gsm or more and 45 gsm or less), the filler content is preferably 15% by weight or more and 45% by weight or less.
Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler is preferably 15 wt% or more and 45 wt% or less, and when the basis weight is more than 35 gsm and 45 gsm or less, the filler is preferably 25 wt% or more and 45 wt% or less.
As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but it is preferable to use calcium carbonate from the viewpoint of enhancing flavor and whiteness.

Various auxiliaries other than the base paper and fillers may be added to the cigarette paper. For example, a water resistance improver may be added to improve water resistance. The water resistance improver includes a wet strength agent (WS agent) and a sizing agent. Examples of the wet strength agent include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of the sizing agent include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), highly saponified polyvinyl alcohol with a saponification degree of 90% or more, etc.
As an auxiliary, a paper strength enhancer may be added, for example, polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves the air permeability (JP 2017-218699 A).
The wrapping paper may also be appropriately coated.

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

[Tip paper]
The configuration of the tipping paper 15 is not particularly limited and may be a general embodiment, for example, one containing pulp as the main component. The pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp generally used for cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in combination in any ratio.
The tipping paper 15 may be made up of one sheet, or may be made up of multiple sheets or more.
As the form of pulp, chemical pulp produced by the kraft cooking method, acidic/neutral/alkaline sulfite cooking method, soda salt cooking method, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc. can be used.
The tipping paper 15 may be produced by the production method described below, or a commercially available product may be used.
The shape of the tipping paper 15 is not particularly limited and can be, for example, square or rectangular.

The basis weight of the tipping paper 15 is not particularly limited, but is usually 32 gsm or more and 40 gsm or less, preferably 33 gsm or more and 39 gsm or less, and more preferably 34 gsm or more and 38 gsm or less.
The air permeability of the tipping paper 15 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 expressed as the flow rate (cm ³ ) of gas passing through an area of 1 cm ² per minute when the differential pressure between both sides of the paper is 1 kPa. 1 Coresta unit (1 Coresta unit, 1 C.U.) is cm ³ /(min·cm ² ) under 1 kPa.

In addition to the pulp, the chip paper 15 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc., and it is particularly preferable that the chip paper 15 contains calcium carbonate from the viewpoint of improving whiteness and opacity and increasing the heating rate. Furthermore, these fillers may be used alone or in combination of two or more types.

In addition to the above pulp and fillers, various auxiliary agents may be added to the chip paper 15. For example, the chip paper 15 may have a water resistance improver to improve the chip paper 15. The water resistance improver includes a wet strength agent (WS agent) and a sizing agent. Examples of wet strength agents include urea formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 15. There are no particular limitations on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred.

The configuration of the non-combustion heated tobacco product according to this embodiment can be used in the electrically heated tobacco products described below, but can also be applied to cigarettes (paper cigarettes) that involve combustion.

[Method of manufacturing non-combustion heated tobacco]
The method for producing the above-mentioned non-combustion heating tobacco is not particularly limited, and any known method can be applied. For example, the tobacco rod portion and the mouthpiece portion can be wrapped in tip paper to produce the tobacco.

<Electrically heated tobacco products>
An electrically heated tobacco product according to another embodiment of the present invention (also simply referred to as an "electrically heated tobacco product") is an electrically heated tobacco product comprising an electrically heated device including a heater element, a battery unit that serves as a power source for the heater element, and a control unit for controlling the heater element, and the above-mentioned non-combustion heated tobacco inserted so as to be in contact with the heater element.
The electrically heated tobacco product may be configured to heat the outer peripheral surface of the non-combustion heated tobacco product 10 as shown in Fig. 3, or may be configured to heat the tobacco rod portion 11 of the non-combustion heated tobacco product 10 from the inside as shown in Fig. 4. The electrically heated device 20 shown in Figs. 3 and 4 is provided with an air introduction hole, but this is not shown here. The electrically heated tobacco product 30 will be described below with reference to Fig. 4. Note that for the non-combustion heated tobacco product 10 in Figs. 3 and 4, some of the reference symbols representing the components shown in Figs. 1 and 2 are omitted.
The electrically heated tobacco product 30 is used by inserting the non-combustion heated tobacco product 10 described above into contact with the heater member 21 arranged inside the electrically heated device 20.
The electrically heated device 20 has a battery unit 22 and a control unit 23 inside a body 24 made of, for example, resin.
When the non-combustion heated tobacco 10 is inserted into the electrically heated device 20, the outer surface of the tobacco rod portion 11 comes into contact with the heater member 21 of the electrically heated device 20, and eventually the entire outer surface of the tobacco rod portion 11 and a portion of the outer surface of the tipping paper come into contact with the heater member 21.
The heater member 21 of the electrically heated device 20 generates heat under the control of the control unit 23. The heat is transmitted to the tobacco rod portion 11 of the non-combustion heat-not-burn tobacco 10, causing the aerosol base material, flavor components, and the like contained in the tobacco filler of the tobacco rod portion 11 to volatilize.

The heater member 21 may be, for example, a sheet heater, a flat heater, or a cylindrical heater. The sheet heater is a flexible sheet-shaped heater, and examples thereof include a heater including a film (thickness: about 20 μm to 225 μm) of a heat-resistant polymer such as polyimide. The flat heater is a rigid flat heater (thickness: about 200 μm to 500 μm), and examples thereof include a heater having a resistance circuit on a flat substrate and using that part as a heat generating part. The cylindrical heater is a hollow or solid cylindrical heater (thickness: about 200 μm to 500 μm), and examples thereof include a heater having a resistance circuit on the outer circumferential surface of a metal cylinder and using that part as a heat generating part. In addition, examples thereof include rod-shaped heaters and cone-shaped heaters made of metal or the like that have a resistance circuit inside and use that part as a heat generating part. The cross-sectional shape of the cylindrical heater may be a circle, an ellipse, a polygon, a rounded polygon, or the like.
In the case of an embodiment in which the outer peripheral surface of the non-combustion heat-not-burn tobacco 10 is heated as shown in Fig. 3, the above-mentioned sheet-shaped heater, flat plate-shaped heater, and cylindrical heater can be used. On the other hand, in the case of an embodiment in which the tobacco rod portion 11 of the non-combustion heat-not-burn tobacco 10 is heated from the inside as shown in Fig. 4, the above-mentioned flat plate-shaped heater, columnar heater, and cone-shaped heater can be used.
The length of the heater member 21 in the major axis direction can be within the range of L±5.0 mm, where the length of the tobacco rod portion 11 in the major axis direction is L mm. From the viewpoint of sufficiently transferring heat to the tobacco rod portion 11 and sufficiently volatilizing the aerosol base material and flavor components contained in the tobacco filling, i.e., from the viewpoint of aerosol delivery, the length of the heater member 21 in the major axis direction is preferably L mm or more, and from the viewpoint of suppressing the generation of components that have an undesirable effect on the flavor, etc., the length is preferably L+0.5 mm or less, L+1.0 mm or less, L+1.5 mm or less, L+2.0 mm or less, L+2.5 mm or less, L+3.0 mm or less, L+3.5 mm or less, L+4.0 mm or less, L+4.5 mm or less, or L+5.0 mm or less.

The heating intensity, such as the heating time and heating temperature of the non-combustion heated tobacco product 10 by the heater member 21, can be preset for each electrically heated tobacco product 30. For example, by pre-heating for a certain period of time after inserting the non-combustion heated tobacco product 10 into the electrically heated device 20, the temperature of the outer circumferential surface of the portion of the non-combustion heated tobacco product 10 inserted into the electrically heated device 20 reaches X (°C), and thereafter, the temperature can be preset to be maintained at a constant temperature of X (°C) or less.
From the viewpoint of the delivery amount of components generated by heating, the above X (°C) is preferably 80°C or more and 400°C or less. Specifically, it can be 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 310°C, 320°C, 330°C, 340°C, 350°C, 360°C, 370°C, 380°C, 390°C, or 400°C.
When heated by the heater member 21, steam containing components derived from the aerosol base material and components derived from flavor components is generated from the tobacco rod portion 11 and reaches the user's oral cavity through the mouthpiece portion 14, which is composed of a cooling segment 12, a filter segment 13, etc.

From the viewpoint of promoting the inflow of air from the outside and suppressing the retention of components and air generated by heating within the cooling segment 12, it is preferable that the opening V provided in the cooling segment 12 is located closer to the mouth end than the end of the region in contact with the electrically heated device 20 (the point indicated by the arrow X in the figure) in the cooling segment 12, as shown in Figure 5. In addition, the insertion port of the electrically heated device 20 for the non-combustion heated tobacco 10 may be tapered as shown in Figure 6 to make it easier to insert the non-combustion heated tobacco 10. In this case, the end of the region in contact with the electrically heated device 20 on the mouth end side is the position indicated by the arrow Y in the figure. Note that for the non-combustion heated tobacco 10 in Figures 5 and 6, some of the symbols representing the components shown in Figures 1 to 4 are omitted.

The present invention will be explained in more detail by way of examples, but the present invention is not limited to the description of the following examples as long as it does not deviate from the gist of the present invention.

[Example 1]
<Preparation of Fragrance-Containing Sheet>
A mixture of 1.0 g of gellan gum ("Kelcogel" manufactured by CP Kelco), 1.0 g of tamarind gum ("Bistop D-2032" manufactured by San-Ei Gen F.F.I. Co., Ltd.), and 100 mL of water was heated in a thermostatic water bath at 80°C to thoroughly dissolve the gellan gum and tamarind gum in the water. 10 g of 1-menthol as a flavoring agent and 1.6 mL of a 5% aqueous solution of lecithin as an emulsifier were added thereto, and the mixture was thoroughly emulsified using a homogenizer. The resulting emulsified slurry was cast into a sheet on a suitable support and dried for one week in a forced air circulation dryer at 40°C to obtain a flavoring-containing sheet having a thickness of 100 μm.

<Measurement of Fragrance Content in Fragrance-Containing Material>
The sheet-like fragrance-containing material was cut with scissors to a width of about 1 mm and a length of about 10 mm, and about 0.1 g was precisely weighed and placed in a serum bottle. 10 mL of methanol (for HPLC, manufactured by Wako) was added to the serum bottle as an extraction solvent. The serum bottle was closed with a rubber stopper and further sealed with Parafilm (registered trademark). The serum bottle was shaken at 200 rpm for 40 minutes in a shaker, left to stand for 12 hours or more, and then shaken again for 40 minutes in a shaker. The sample was left to stand for 5 minutes, and the supernatant was collected with a Pasteur pipette to be used as a sample for measuring the fragrance content. Since the extract had a high concentration, it was diluted 10 times prior to analysis.

The above sample was analyzed using a GC-FID (Agilent) under the following measurement conditions, and the content of the flavor in the flavor-containing material was determined from the peak area value. As a result, the content of the flavor (menthol) in the obtained flavor-containing material was 70% by mass.

(GC measurement conditions)
Equipment: GC [Agilent 6890N] [Agilent 5973inert]
GC method (introduce 1 μL of sample liquid)
Equipment: Inlet; unsplit, heater; 200°C, pressure; 5.5 psi, total flow rate; 50 mL/min, purge flow to split vent; 40 mL/min
Column; Agilent DB-WAX [30 m×530μm×1.00μm], constant flow rate, outlet; vacuum
He flow: pressure; 5.5 psi, flow rate; 7.3 mL/min, average velocity; 52 cm/sec

<Production of non-combustion heat-not-burn tobacco>
The flavor-containing sheet was cut into strips with a width of 1 mm and a length of 3 mm to obtain the flavor-containing sheet cut pieces. The above cut pieces were added to a mixture of 15 g/100 g glycerin and 4 g/100 g propylene glycol with shredded tobacco sheets (width 0.8 mm) in advance so that the menthol content per non-combustion heat-not-burn cigarette finally obtained was 7 mg, and the tobacco shreds and the above cut pieces were mixed uniformly to prepare a tobacco filler. The tobacco filler was rolled up with cigarette paper (manufactured by Nippon Paper Papylia, basis weight 35 g/m ² , thickness 52 μm) using a high-speed rolling machine.
The weight of each piece was 0.8 g, the circumference of the winding was 22 mm, and the winding length was 68 mm.
The rolled tobacco rods were stored in plastic airtight containers, 200 per level.
The stored tobacco rod was cut to a length of 20 mm. Then, the tobacco rod, a 20 mm long paper tube (cooling segment), a 20 mm long filter segment consisting of a center hole filter (5.8Y35000) having a through hole (diameter 4.5 mm) and a 20 mm long filter filled with cellulose acetate fiber were wrapped with the tipping paper prepared above to produce a non-combustion heat-not-burn tobacco without openings, and then 17 holes were drilled at a position 5.5 mm from the boundary between the cooling segment and the filter segment toward the cooling segment side (25.5 mm from the mouth end of the non-combustion heat-not-burn tobacco) so as to be concentric in the circumferential direction of the cooling segment and to penetrate both the tipping paper and the cooling segment, thereby producing the non-combustion heat-not-burn tobacco of Example 1.
The diameter of the aperture was adjusted so that the air inflow rate from the aperture was 72% by volume when inhaling at 17.5 ml/sec with a Borgwaldt single-puff automatic smoking machine. This air inflow rate was measured by a method conforming to ISO 9512. In all of the examples and comparative examples described below, the diameter of the aperture was adjusted so that the air inflow rate was 72% by volume.

<Evaluation of flavor delivery amount>
Each of the non-combustion heat-not-burn tobacco products prepared in Example 1 was subjected to a smoking test, and the delivery amount of components generated by heating was evaluated.
The smoking test was carried out under the following conditions with reference to the Canadian Intense Regime (CIR).
An electric heating device that heats the periphery was used, and after inserting a non-combustion heated tobacco, the heater temperature was raised to 295°C within 21 seconds, lowered to 260°C within 5 seconds, and maintained at 260°C until the end of the evaluation (about 330 seconds). After this, the smoking test was performed using a Borgwaldt single-puff automatic smoking machine under the conditions of a flow rate of 55cc/2 seconds and a smoking interval of 30 seconds. At this time, the opening made in the cooling segment was set to be 25.5 mm from the end of the mouth end side of the region where the non-combustion heated tobacco and the electric heating device contact. The mainstream smoke generated in the smoking test was collected in a Cambridge pad, and after 12 puffs, the Cambridge pad was removed and extracted with 10 mL of ethanol, and the amount of menthol in the mainstream smoke collected at each puff was measured using GC-MS.
In the non-combustion heating tobacco of Example 1, the amount of menthol delivered in each puff when the total amount of menthol delivered is set to 1 is shown in Table 1 below and FIG.

[Comparative Example 1]
A non-combustion heat-not-burn tobacco of Comparative Example 1 was produced in the same manner as in Example 1, except that 15 g/100 g of glycerin and 4 g/100 g of propylene glycol were mixed in advance with shredded sheet tobacco (width 0.8 mm) and menthol was added to the mixture so that the final non-combustion heat-not-burn tobacco had a menthol content of 7 mg per cigarette. The flavor delivery amount of the obtained non-combustion heat-not-burn tobacco was evaluated in the same manner as in Example 1. The results are shown in Table 1 and FIG. 7 below.

From Table 1 and Figure 7 above, it was found that in Comparative Example 1, in which the flavoring menthol was added directly to the tobacco shreds, most of the menthol was delivered in the first to fourth puffs, and the amount of menthol delivered in subsequent puffs was significantly reduced. On the other hand, in Example 1, in which the tobacco rod portion contained tobacco shreds and a flavoring-containing material, it was confirmed that there was little variation in the amount of menthol delivered per puff from the early to late stages of smoking, and that a sufficient amount of menthol was delivered even in the later stages of smoking.

The above experimental results demonstrate that the present invention makes it possible to obtain a non-combustion heated tobacco product with little variation in the amount of flavor delivered per puff from the early to late stages of smoking.

Reference Signs List 10 Non-combustion heated tobacco 11 Tobacco rod portion 12 Cooling segment 13 Filter segment 14 Mouthpiece portion 15 Tip paper V Opening 20 Electrically heated device 21 Heater member 22 Battery unit 23 Control unit 24 Body 30 Electrically heated tobacco product

Claims (7)

A rod-shaped non-combustion heat-not-burn tobacco product comprising a tobacco rod portion and a mouthpiece portion,
The mouthpiece portion includes a cooling segment and a filter segment including a filter medium, the cooling segment and the filter segment being adjacent to each other,
The tobacco rod portion is a non-combustion heated tobacco comprising dried tobacco leaves and a flavor-containing material in which a flavor is encapsulated in a polysaccharide gel. A non-combustion heated tobacco product as described in claim 1, in which openings are provided concentrically around the circumference of the cooling segment, and the openings are present in an area 2 mm to 15 mm from the boundary between the cooling segment and the filter segment toward the cooling segment. A non-combustion heated tobacco product as described in claim 1 or 2, wherein the filter segment further includes a center hole segment having one or more hollow portions. A non-combustion heated tobacco according to any one of claims 1 to 3, wherein the tobacco rod portion contains 1% to 20% by mass of the flavor-containing material relative to the dried tobacco leaves. A non-combustion heated tobacco according to any one of claims 1 to 4, wherein the tobacco rod portion contains 1 mg to 30 mg of the flavoring in the flavoring-containing material. A non-combustion heated tobacco product according to any one of claims 1 to 5, wherein the flavoring is menthol. An electrically heated tobacco product comprising: an electrically heated device having a heater member, a battery unit serving as a power source for the heater member, and a control unit for controlling the heater member; and a non-combustion heated tobacco product according to any one of claims 1 to 6, which is inserted so as to come into contact with the heater member.

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