ES3012739T3 - Heat-not-burn tobacco product and electrically heated tobacco product - Google Patents

Abstract

The present invention addresses the problem of providing a heat-not-burn tobacco product that reduces the amount of a substance generated by a component of a labial release agent during use, which has an undesirable effect on the aroma and the like; and an electrically heated tobacco product. This heat-not-burn tobacco product consists of a tobacco rod and a mouthpiece, and has a portion wrapped with tipping paper. A labial release agent is applied to at least a portion of the tipping paper. In the longitudinal direction of the heat-not-burn tobacco product, the wrapped portion is constituted by a first region including a mouthpiece-side end and a second region including a tobacco rod-side end. Both regions satisfy the following condition (A). (A): (Lip-release agent content per unit area of the first region) > (Lip-release agent content per unit area of the second region). (Automatic translation with Google Translate, no legal value)

Description

DESCRIPTION

Heated tobacco product without combustion and electrically heated tobacco product

Technical field

The present invention relates to a combustion-free heated tobacco product and an electrically heated tobacco product.

Background of the Technique

An electrically heated tobacco product has been developed that includes an electric heating device and a heated tobacco product without combustion, the electric heating device including a heating element, a battery unit serving as a power source for the heating element, and a control unit for controlling the heating element, with the heated tobacco product without combustion inserted into the electric heating device such that the heated tobacco product without combustion comes into contact with the heating element (PTL 1). The heated tobacco product without combustion generally includes a tobacco rod formed by wrapping chopped tobacco, an aerosol source material, etc. with wrapping paper, a mouthpiece through which an aerosol generated from the tobacco rod is inhaled when the tobacco rod is heated; and tipping paper with which the tobacco rod and the mouthpiece are wrapped.

The electrically heated tobacco product is used by inserting the heated tobacco product into the electric heating device. The heating element generates heat to warm the tobacco rod from the location where the tobacco rod is in contact with the heating element, so that the aerosol source material contained in the tobacco rod is delivered to the user along with the flavor and aroma components of the smoke.

In the technical fields related to tobacco, particularly in the field of heated-not-burn tobacco products, improvements in the flavor and taste of smoke are desired.

List of Appointments

Patent Bibliography

PTL1: Japanese Unexamined Patent Application Publication No. 2018-191652. US-A-5 595 196 describes a filter cigarette comprising a lip release agent provided in the mouthpiece paper.

Summary of the Invention

Technical Problem

In the technical field of heated-not-burn tobacco products, it is desirable to reduce the generation of components that have an undesirable influence on, for example, the smoke flavor. In this field, little research has been conducted on a coating agent for mouthpiece paper that would satisfy this desire.

An example of the coating agent for the mouthpiece paper is a lip release agent applied to reduce the adhesion of the mouthpiece paper to the user's lips.

The inventor of the present invention has discovered that a component of the lip release agent applied to the mouthpiece paper decomposes when the lip release agent is heated during use of the heated-not-burn tobacco product, and that the decomposed component contributes to an increase in the amount of a substance that has an undesirable influence on, for example, the smoke flavor.

Accordingly, an object of the present invention is to provide a heated-not-burn tobacco product and an electrically heated tobacco product in which the amount of a substance generated from a component of a lip release agent during use of the heated-not-burn tobacco product and having an undesirable influence on, for example, the smoky flavor is reduced.

Solution to the Problem

As a result of intensive studies, the inventor of the present invention has arrived at the present invention based on the following findings. That is, when the content of the lip release agent is within a specific range in a specific region of a wrapped portion that is wrapped with the mouthpiece paper, exfoliation of the lip skin can be prevented, that is, suitable lip release properties can be obtained, and the amount of the substance generated during use of the heated-not-burning tobacco product and having an undesirable influence on, for example, the smoky flavor can be reduced.

The essence of the present invention is as follows:

[1] A heated tobacco product without combustion and comprising a tobacco rod part, a mouthpiece part and a wrapped part in which the tobacco rod part and the mouthpiece part are wrapped with mouthpiece paper,

wherein a lip release agent is applied to at least a portion of the mouthpiece paper,

wherein the wrapped portion consists of a first region and a second region in a longitudinal direction of the heated-not-burning tobacco product, the first region including a mouthpiece-side end of the heated-not-burning tobacco product and the second region including a tobacco rod-side end, characterized in that the first region and the second region satisfy the following condition (A)

(A) (a content of the lip release agent per unit area in the first region) > (a content of the lip release agent per unit area in the second region).

[2] The heated tobacco product without combustion according to [1], wherein the first region is a region from the mouthpiece-side end of the heated tobacco product without combustion to a position at a distance of 17 mm from the mouthpiece-side end of the heated tobacco product without combustion in the longitudinal direction of the heated tobacco product without combustion, and

wherein the second region is a region from the position at a distance of 17 mm to the end of the tobacco stick side of the wrapped portion in the longitudinal direction.

[3] The heated tobacco product without combustion according to [1], wherein the first region is a region from the mouthpiece-side end of the heated tobacco product without combustion to a position at a distance of 42.5 % of a length of the wrapped portion in the longitudinal direction of the heated tobacco product without combustion from the mouthpiece-side end of the heated tobacco product without combustion, and

wherein the second region is a region from the position at a distance of 42.5% from the end of the tobacco stick side of the wrapped portion in the longitudinal direction.

[4] The heated non-combustion tobacco product according to [1], wherein the mouthpiece portion comprises a cooling portion and a filter portion.

[5] The heated tobacco product without combustion according to [4], wherein the cooling part has a plurality of openings, and the plurality of openings are arranged in a circumferential direction of an outer peripheral surface of the cooling part,

wherein the first region is a region from the mouthpiece-side end of the heated-not-burning tobacco product to a position where the openings are arranged along a length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product, and

wherein the second region is a region from the position at which the openings are arranged to the end of the tobacco stick side of the wrapped portion in the longitudinal direction.

[6] The heated-not-burned tobacco product according to any one of [1] to [5], wherein a ratio of the content of the lip release agent per unit area in the second region to the content of the lip release agent per unit area in the first region is 1/2 or less.

[7] The heated-not-burned tobacco product according to [6], wherein the ratio of the content of the lip release agent per unit area in the second region to the content of the lip release agent per unit area in the first region is 1/4 or less.

[8] The heated-not-burned tobacco product according to any one of [1] to [7], wherein the content of the lip release agent per unit area in the second region is less than 0.56 pg/mm2.

[9] The heated-not-burned tobacco product according to any one of [1] to [8], wherein the lip release agent contains at least nitrocellulose or ethylcellulose.

[10] An electrically heated tobacco product comprising an electric heating device and a heated non-combustion tobacco product according to any one of [1] to [9], the electric heating device comprising a heating element, a battery unit serving as a power source for the heating element and a control unit for controlling the heating element, the heated non-combustion tobacco product being inserted into the electric heating device such that the heated non-combustion tobacco product comes into contact with the heating element.

Advantageous Effects of the Invention

The present invention provides a heated-not-combustion tobacco product and an electrically heated tobacco product in which the amount of a substance generated from a component of a lip release agent during use of the heated-not-combustion tobacco product and having an undesirable influence on, for example, the smoky flavor is reduced.

Brief Description of the Drawings

[Fig. 1] Fig. 1 is a schematic diagram illustrating a heated-not-burn tobacco product according to one embodiment.

[Fig. 2] Fig. 2 is a schematic diagram illustrating modifications of the heated-not-burn tobacco product in accordance with the embodiment.

[Fig. 3] Fig. 3 is a schematic diagram illustrating a partial modification of the heat-not-burn tobacco product according to the embodiment.

[Fig. 4] Fig. 4 is a schematic diagram illustrating examples of openings in the heated-not-burn tobacco product according to the embodiment.

[Fig. 5] Fig. 5 is a schematic diagram illustrating an electrically heated tobacco product according to an embodiment in which an outer peripheral surface of a tobacco rod is heated.

[Fig. 6] Fig. 6 is a schematic diagram illustrating an electrically heated tobacco product according to an embodiment in which an inner peripheral surface of the tobacco rod is heated.

Description of Achievements

Embodiments of the present invention will be described in detail below. However, the embodiments described below are examples (representative examples) of embodiments of the present invention, and the present invention is not limited thereto, provided that the essence thereof is maintained.

In the schematic diagrams of Figs. 1 through 6 illustrating heated-not-burned tobacco products, various components are enlarged or reduced in size as appropriate for ease of illustration, and are not illustrated in actual sizes and proportions in accordance with embodiments of the present invention.

The concept of a wrapped part is a part that includes mouthpiece paper and a lip release agent applied to the mouthpiece paper.

Furthermore, in this specification, an "outer side" of the wrapped portion means a side that comes into contact with the user's lips during use of the heated-not-burned tobacco product, and an "inner side" of the wrapped portion is a side opposite the side described above.

Additionally, in this specification, where a range is specified using numerical values or physical property values with "up to" between them, the range shall be understood to include the values on both sides.<1. Heated-Not-Burned Tobacco Product>

A heated-not-burn tobacco product according to an embodiment of the present invention (hereinafter also referred to simply as a "heated-not-burn tobacco product") includes a tobacco rod portion, a mouthpiece portion, and a wrapped portion wherein the tobacco rod portion and the mouthpiece portion are wrapped with mouthpiece paper.

A lip release agent is applied to at least a portion of the mouthpiece paper.

The wrapped portion consists of a first region and a second region in a longitudinal direction of the heated-not-burned tobacco product, the first region including a mouthpiece-side end of the heated-not-burned tobacco product and the second region including a tobacco rod-side end.

The first region and the second region satisfy the following condition (A):

(A) (a content of the lip release agent per unit area in the first region) > (a content of the lip release agent per unit area in the second region).

Fig. 1 illustrates an example of the heated-not-burned tobacco product according to the embodiment described above. The heated-not-burned tobacco product will now be described with reference to Fig. 1. Although the lip release agent is applied to one side of the tipping paper with a uniform density over its entire surface in Fig. 1, the lip release agent is not limited to this, and instead may be applied with different densities depending on the location. This also applies to other figures.

The direction indicated by h in Fig. 1 is the longitudinal direction of the heated tobacco product without combustion.

The heated-not-burned tobacco product is preferably a rod-shaped object having an aspect ratio of 1 or more, the aspect ratio being defined as follows:

aspect ratio = h/w

where w is the width of the bottom surface of the stick-shaped object (width of the bottom surface of the tobacco stick portion side in this specification), and h is the height. Preferably, h > w is satisfied. As described above, in this specification, the longitudinal direction is defined as the direction indicated by h. Therefore, even when w > h, the direction indicated by h is called the longitudinal direction for convenience. The shape of the bottom surface is not limited and may be, for example, a polygonal shape, a rounded polygonal shape, a circular shape, or an elliptical shape. When the bottom surface is circular, the width w is the diameter. When the bottom surface is elliptical, the width w is the length along the major axis. When the bottom surface is polygonal or rounded polygonal, the width w is the diameter of a circumscribed circle or the length along the major axis of a circumscribed ellipse. In the embodiment illustrated in Fig. 1, for example, the bottom surface is circular, and therefore the width w is its diameter. The diameter is the width w, and the length in a direction orthogonal to the bottom surface is the height h.

The length h of the heated-not-burned tobacco product in the longitudinal direction is not particularly limited. For example, the length h is typically 35 mm or more, preferably 40 mm or more, and more preferably 45 mm or more. Furthermore, the length h is typically 105 mm or less, preferably 95 mm or less, and more preferably 85 mm or less.

The width w of the bottom surface of the rod-shaped body of the heated-not-burning tobacco product is not particularly limited. For example, the width w is typically 5 mm or more, and preferably 5.5 mm or more. Furthermore, the width w is typically 10 mm or less, preferably 9 mm or less, and more preferably 8 mm or less.

The components of the heated-not-burn tobacco product will be described below.

<1-1. Wrapped Part>

[First Region and Second Region of the Enveloped Part]

As illustrated in Fig. 1, a wrapped portion, in which a tobacco rod portion 10 and a mouthpiece portion 11 are wrapped with mouthpiece paper 12, consists of a first region 12a and a second region 12b. Although not illustrated in Fig. 1, as described below, the tobacco rod portion 10 is formed by wrapping a tobacco filler with mouthpiece paper. A lip release agent 13 is applied to at least a portion of the mouthpiece paper.

The first region 12a is a region that includes a mouthpiece-side end of the heated-not-combustion tobacco product in the longitudinal direction of the heated-not-combustion tobacco product. The second region 12b is a region located on one side of the tobacco rod portion of the first region in the wrapped portion. The first region and the second region are adjacent to each other.

In Fig. 1, the lip release agent in the first region is designated by 13a, and the lip release agent in the second region is designated by 13b.

The content of the lip release agent per unit area in the first region may be simply referred to as an "amount of the lip release agent in the first region", and the content of the lip release agent per unit area in the second region may be simply referred to as an "amount of the lip release agent in the second region".

In a heated-not-burn tobacco product according to the related art, the lip release agent is typically applied to a surface of the tipping paper over its entire surface, and the density of the lip release agent does not vary over the surface. In other words, the lip release agent is not applied to satisfy condition (A) described above. In this case, although the purpose of applying the lip release agent, which is to obtain sufficient lip release properties, is achieved, the substances generated from the lip release agent when the lip release agent is heated are released from the entire surface of the tipping paper during use.

In contrast, when the lip release agent is applied to satisfy the above-described condition (A), the lip release agent in the first region provides sufficient lip release properties. Furthermore, since the amount of the lip release agent in the second region is less than the amount of the lip release agent in the first region, compared to the above-described heated-not-burn tobacco product according to the related art, the generation of substances from the lip release agent during use is reduced. The lip release agent is applied to at least a portion of the mouthpiece paper. To obtain sufficient lip release properties, the lip release agent is preferably applied to at least a portion of a region in which a filter portion described below, which may be included in the mouthpiece portion, is disposed directly beneath the mouthpiece paper. It is also preferable to apply the lip release agent over this entire region.

The shape of the first region and the second region is not particularly limited. Particularly preferred shapes will be described below.

(1) First Form

According to a first embodiment of the first region and the second region, the first region is a region from the mouthpiece-side end of the heated-not-burning tobacco product to a position at a distance of 17 mm from the mouthpiece-side end of the heated-not-burning tobacco product in the longitudinal direction of the heated-not-burning tobacco product. The second region is a region from the position at a distance of 17 mm to the tobacco rod-side end of the wrapped portion in the longitudinal direction.

In a typical mode of use of the heated-not-smoke tobacco product, when the lip release agent is applied to the first region extending from the mouthpiece-side end of the heated-not-smoke tobacco product to the position at a distance of 17 mm, considering the contact region between the heated-not-smoke tobacco product and the smoker's lips during use (also referred to as the "lip contact region"), sufficient lip release properties can be obtained. Furthermore, by reducing the amount of the lip release agent applied to the second region extending from the position at a distance of 17 mm to the tobacco rod-side end of the wrapped portion in the longitudinal direction, the amounts of substances generated from the lip release agent during use can be reduced.

The position of the boundary between the first region and the second region may be a position at a distance of 17 mm from the mouthpiece-side end of the heated-not-burning tobacco product for the reason described above. However, to reduce the amount of substances generated from the lip-release agent during use, the distance is preferably 15 mm, more preferably 13 mm, and particularly preferably 10 mm. When the position described above is further shifted toward the mouthpiece-side end, it becomes difficult to obtain sufficient lip-release properties.

(2) Second Form

According to a second embodiment of the first region and the second region, the first region is a region from the mouthpiece-side end of the heated-not-burning tobacco product to a position at a distance of 42.5% of a length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product from the mouthpiece-side end of the heated-not-burning tobacco product. The second region is a region from the position at a distance of 42.5% to the tobacco rod-side end of the wrapped portion in the longitudinal direction.

Similar to the first embodiment described above, considering a typical mode of use of the heated-not-burning tobacco product, when the lip release agent is applied to the first region from the mouthpiece-side end of the heated-not-burning tobacco product to a position at a distance of 42.5% of the length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product, sufficient lip release properties can be obtained. In addition, the amount of substances generated from the lip release agent during use can be reduced.

The position of the boundary between the first region and the second region may be the position at which the ratio of the distance from the mouthpiece-side end of the heated-not-burning tobacco product to the length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product is 42.5% for the reason described above. However, to reduce the amount of substances generated from the lip release agent during use, the ratio is preferably 37.5%, more preferably 32.5%, and particularly preferably 25%. When the above-described position is further shifted toward the mouthpiece-side end, it becomes difficult to obtain sufficient lip release properties.

(3) Third Form

The mouthpiece portion of the heated tobacco product according to the present embodiment may include a cooling portion and a filter portion. In this case, a third shape of the first region and the second region may be employed. In the third shape, the cooling portion has a plurality of openings, and the openings are arranged in the circumferential direction of the outer peripheral surface of the cooling portion. The first region is a region from the mouthpiece-side end of the heated tobacco product to a position where the openings are arranged along a length of the wrapped portion in the longitudinal direction of the heated tobacco product. The second region is a region from the position where the openings are arranged to the tobacco rod-side end of the wrapped portion in the longitudinal direction.

The openings in the cooling portion allow diluted air to flow to a region closer to the mouthpiece-side end than the openings to allow control of the air and smoke flow in the cooling portion and the filter portion during use. In general, the region closer to the mouthpiece-side end than the position at which the openings are provided serves as the lip contact region. Accordingly, when the lip release agent is applied to the region closer to the mouthpiece-side end than the position of the openings, sufficient lip release properties can be obtained. As described above in the description of the first form, by reducing the amount of the lip release agent applied to the second region, the amounts of substances generated from the lip release agent during use can be reduced. In particular, the air and smoke flow in the mouthpiece portion generally changes with the position of the openings, and the temperature of the wrapped portion in the region closest to the mouthpiece-side end of the openings is considerably lower than the temperature of the wrapped portion in the region closest to the tobacco rod. Therefore, the amount of substances generated from the lip release agent can be greatly reduced by reducing the content of the lip release agent in the wrapped portion in the region closest to the tobacco rod.

In the present field, the openings described above may be referred to as "ventilation openings".

The openings are arranged in the circumferential direction of the outer peripheral surface of the cooling portion (more specifically, in a plane extending through the cooling portion and perpendicular to the longitudinal direction of the heated tobacco product). The number of sets of openings arranged in the circumferential direction (also referred to as "circumferential arrangement sets") is not particularly limited and may be two or more. In this case, since the circumferential arrangement sets are generally arranged outside the lip contact region, one of the circumferential arrangement sets closest to the mouthpiece-side end serves as the circumferential arrangement set at the boundary between the first region and the second region.

The position of the openings is not particularly limited. However, to reduce the amount of substances generated from the lip release agent during use, the openings are preferably positioned at a distance of 17 mm from the mouthpiece-side end of the heated-not-burning tobacco product along the length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product. The distance is more preferably 15 mm, even more preferably 13 mm, and particularly preferably 10 mm.

[Structure of the Wrapped Part]

The structures of the nozzle paper included in the wrapped portion and the lip release agent applied thereto are not particularly limited. As illustrated in Fig. 1, the lip release agent is generally applied to a single surface of a nozzle paper sheet over its entire surface. However, the shapes illustrated in Figs. 2(a) to 2(f) described below and combinations thereof may also be employed.

Fig. 2(a): Form in which a single sheet of mouthpiece paper has a portion to which no lip release agent is applied.

Fig. 2(b): Form in which a single sheet of mouthpiece paper has no lip release agent applied in the second region.

Fig. 2(c): Form in which a single sheet of mouthpiece paper has lip release agent having a density gradient along its surface.

Fig. 2(d): Manner in which a lip release agent is applied to two or more overlapping nozzle paper sheets.

Fig. 2(e): Manner in which a lip release agent is applied to each of two or more overlapping nozzle paper sheets.

Fig. 2(f): Manner in which a lip release agent is applied to two or more sheets of mouthpiece paper arranged to partially overlap.

According to the shapes illustrated in Figs. 2(a) to 2(f), the shape illustrated in Fig. 2(b) is preferably employed to reduce the amounts of substances generated from the lip release agent during use.

The degree of adhesion of the wrapped portion in the first region is not particularly limited. However, to improve lip separation after use, the degree of adhesion is typically 0.2 seconds or more, preferably 0.3 seconds or more, and more preferably 0.4 seconds or more. Furthermore, the degree of adhesion is typically 2.0 seconds or less, preferably 1.5 seconds or less, and more preferably 1.0 seconds or less.

The degree of adhesion of the wrapped portion in the second region is not particularly limited. However, considering the effects on smoke flavor, the adhesion degree is typically 0.01 seconds or more, preferably 0.03 seconds or more, and more preferably 0.05 seconds or more. Furthermore, the adhesion degree is typically 0.20 seconds or less, preferably 0.15 seconds or less, and most preferably 0.10 seconds or less.

The degree of gluing can be measured under the following conditions:

Measuring Device: Surface and Bonding Tester Model EST 12 (manufactured by Nihon Rufuto Co., Ltd.)

Sample (Test Paper): Paper placed in an environment with a temperature of 23°C and a humidity of 50% RH for 24 hours and then cut to a size of 20 mm x 70 mm.

Measurement Method: The test paper is immersed in a test liquid (water) filling a measuring cell of the measuring device described above. From that moment on, low-energy ultrasonic waves are emitted in a thickness direction. The wetting and impregnation of the test paper from the moment the test paper has come into contact with the test liquid can be evaluated by measuring the change over time in the intensity of the ultrasonic waves received by an ultrasonic wave receiver. In this specification, assuming that a measurement start time is the time when the test paper is completely immersed in the test liquid, the sizing degree is the time from the measurement start time to the moment when a permeability peak is obtained at a maximum value (MAX value).

To improve the separation of the lips after use, the contact angle between the wrapped part and the water is preferably 90° or more, more preferably 100° or more, in both the first region and the second region.

The contact angle can be measured under the following conditions:

Measuring Device: Contact Angle Meter Model DMC-MC3 (manufactured by Kyowa Electronic Instruments Co., Ltd.)

Sample (Test Paper): Paper placed in an environment with a temperature of 23°C and a humidity of 50% RH for 24 hours and then cut to a size of 20 mm x 70 mm.

Measurement Method: The test paper is attached to a glass slide with double-sided adhesive tape. The contact angle can be measured using the 0/2 method as a contact angle assessment method with a liquid droplet (water) quantity of 7 gL and a measurement start time of 1,000 ms.

[Nozzle Paper]

The material of the tipping paper included in the wrapped portion 12 is not particularly limited and may be, for example, paper made from general plant fibers (pulp), a sheet made from polymer-based chemical fibers (polypropylene, polyethylene, nylon, etc.), a polymer-based sheet, or a metal foil such as an aluminum foil. The tipping paper referred to herein means a sheet connecting a plurality of segments of the non-combustion heated tobacco product, for example, the tobacco rod portion and the tipping portion.

The method for manufacturing nozzle paper is not particularly limited, and a general method can be used. For example, when the main component is pulp, the texture can be adjusted to be uniform in a papermaking process using a Fourdrinier paper machine, a cylinder paper machine, a complex cylinder-tanmo paper machine, or the like. If necessary, a wet paper strengthening agent can be added to impart water resistance to the wrapping paper, or a sizing agent can be added to adjust the printing state on the wrapping paper. In addition, internal papermaking additives such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric performance enhancers, lightness improvers, and paper strengthening agents, and papermaking additives such as colorants, pH adjusters, antifoaming agents, pitch control agents, and sludge control agents can be added.

The pulp may be made from wood pulp, such as softwood pulp or hardwood pulp, or it may be produced by blending non-wood pulps, such as flax pulp, cannabis pulp, sisal pulp, and esparto grass, which are commonly used to produce wrapping paper for smoking articles. Examples of pulp types that may be used include chemical pulp produced, for example, by kraft pulping, acid, neutral, or alkaline sulfite pulping, chlorosodium pulping, ground pulp, chemically ground pulp, and thermomechanical pulping.

The height of the nozzle paper 12 in the longitudinal direction is not particularly limited. However, considering the amount of aerosol being supplied and the suitability of production, the height is typically 15 mm or more, preferably 20 mm or more, and more preferably 25 mm or more. Furthermore, the height is typically 55 mm or less, and preferably 50 mm or less.

The thickness of the nozzle paper 12 is not particularly limited. However, considering the amount of aerosol being delivered and the suitability of production, the thickness is typically 30 gm or more, and preferably 35 gm or more. Furthermore, the thickness is typically 150 gm or less, and preferably 140 gm or less.

The grammage of the nozzle paper 12 is not particularly limited. However, considering the amount of aerosol being delivered and the suitability of production, the grammage is typically 30 g/m2 or more, and preferably 35 g/m2 or more. Furthermore, the grammage is typically 150 mm g/m2 or less, and preferably 140 g/m2 or less.

The air permeability of the nozzle paper 12 is not particularly limited. However, considering the amount of aerosol being delivered and the suitability of production, the air permeability is preferably 10 Coresta units or less.

<1-2. Lip Release Agent>

The solids content of the lip release agent according to the present embodiment may be 100% nitrocellulose, 100% ethylcellulose, or a mixture of nitrocellulose and ethylcellulose in any proportion, taking into account ease of analysis and actual solids content. The solids content of the lip release agent may, however, be a mixture additionally containing a component other than nitrocellulose and/or ethylcellulose.

In the field of heated-not-burning tobacco products, for example, the influence of the lip-release agent on the smoke flavor has not been investigated. The inventor of the present invention has prepared a heated-not-burning tobacco product including a wrapped portion having the lip-release agent applied over its entire surface and a heated-not-burning tobacco product satisfying the above-described condition (A), and has conducted an experiment to compare them in terms of the TSNA content in the heated-not-burning tobacco product after use. The result showed that the heated-not-burning tobacco product including the wrapped portion with the lip-release agent applied over its entire surface contained a greater amount of TSNA than the heated-not-burning tobacco product satisfying condition (A). The inventor of the present invention considered the reason for this to be as follows.

A typical component of the lip-release agent is nitrocellulose, which is a nitric ester of cellulose. Nitrocellulose is generally obtained by processing cellulose with a mixed acid of nitric acid and sulfuric acid. When heated, nitrocellulose decomposes and nitric acid is generated. The generated nitric acid reacts with a minor alkaloid contained in the tobacco product material, resulting in the generation of TSNA. In the heated-without-burning tobacco product, including the wrapped portion with the lip-release agent applied over its entire surface, the region in which the lip-release agent is heated is larger than in the heated-without-burning tobacco product, including the wrapped portion with the lip-release agent applied to a portion thereof. Therefore, heat from a heater is directly or indirectly transmitted to the lip-release agent, and a portion of the lip-release agent is excessively heated. This is considered to be the reason for the result described above.

TSNA is a generic term for tobacco-specific nitrosamines. Typical examples of TSNAs include N'-nitrosonomicotin (NNN), 4-(N-nitrosomethylamino)-1-(3-pyridyl)-1-butanone (NNK), N'-nitrosoanatabine (NAT), and N'-nitrosoanabasine (NAB).

When the lip release agent contains nitrocellulose, TSNA is generated as described above. The lip release agent also contains components other than nitrocellulose that can generate a substance that has an undesirable influence, for example, on the smoky flavor. For example, the ethylcellulose that may be contained in the lip release agent can cause an undesirable change, for example, in the smoky flavor.

The material contained in the lip release agent according to the present embodiment is not particularly limited and may be, for example, nitrocellulose, ethylcellulose, or a mixture thereof. In terms of reducing the generation of TSNA, a particularly advantageous effect can be achieved when the lip release agent contains nitrocellulose.

The lip release agent may contain components other than the nitrocellulose and ethylcellulose described above. For example, it may contain a filler such as calcium carbonate. The components of the lip release agent may be commercially available materials.

The method for applying the lip release agent to the mouthpiece paper is not particularly limited, and a general coating method may be used. The lip release agent may be prepared in the form of an aqueous solution or an ethyl acetate solution typically at 1.0 to 30.0% by weight, and the aqueous solution or ethyl acetate solution may be applied to the mouthpiece paper according to the embodiment of the present invention using, for example, a suitable printing method such as gravure printing. In contrast, the lip release agent may be applied to the mouthpiece paper according to the embodiment of the present invention by known means other than printing, such as a method for applying non-transparent ink by ink-jet printing, a spraying method, or an impregnation method.

The lip release agent must be applied to at least a portion of the outer surface of the mouthpiece paper in the first region. The lip release agent may additionally be applied to the inner surface of the mouthpiece paper. However, to reduce the amount of substances generated from the lip release agent during use, it is preferable not to apply the lip release agent to the inner surface of the mouthpiece paper.

[Lip Release Agent Content]

As described above, the content of the lip release agent satisfies condition (A).

When condition (A) is met, sufficient lip release properties can be achieved, and the release of substances from the lip release agent during use can be reduced. Consequently, the amount of the substance that has an undesirable influence on the smoke flavor can be reduced.

The ratio of the content of the lip release agent per unit area in the second region to the content of the lip release agent per unit area in the first region is not particularly limited. However, to ensure sufficient lip release properties and reduce the amount of substances generated from the lip release agent during use, the ratio is preferably 1/2 or less, more preferably 1/4 or less, particularly preferably 1/6 or less, and most preferably 1/8 or less.

The content of the lip release agent per unit area in the first region is not particularly limited, as long as it is greater than the content of the lip release agent per unit area in the second region, but is typically 0.20 gg/mm2 or more and 1.00 gg/mm2 or less, and preferably 0.25 gg/mm2 or more and 0.75 gg/mm2 or less.

The content of the lip release agent per unit area in the second region is not particularly limited. However, in order to reduce the amounts of substances generated from the lip release agent during use, the content of the lip release agent per unit area in the second region is preferably less than 0.56 gg/mm2, more preferably less than 0.28 gg/mm2, particularly preferably less than 0.14 gg/mm2, and most preferably 0 gg/mm2, which means that no lip release agent is applied.

The method for measuring the content of the lip release agent is not particularly limited. For example, the tipping paper of the wrapped portion is removed from the heated-not-burned tobacco product and cut into the first and second regions. The weight of each region is then measured, and the weight of the applied lip release agent is calculated by subtracting the weight of the tipping paper in each of the regions. The calculated weight is then divided by the area of each of the regions to determine the lip release agent content per unit area in each of the first and second regions.

If possible, a value obtained by dividing the weight of the lip release agent applied during manufacturing by the area may be used. Alternatively, a value obtained by dividing the weight of the lip release agent applied, determined from the change in the weight of the mouthpiece paper caused by the application of the lip release agent, by the area of the region in question may be used.

The lip release agent turns brown when heated to a certain level. Therefore, as a simple method to roughly estimate the lip release agent content, a color change on the surface of the mouthpiece paper can be observed after use of the heated-not-burning tobacco product.

The lip release agent content can also be measured using absorptiometric measurement. For example, when nitrocellulose is used as a lip release agent, its content can be calculated using a method described below.

First, a standard calibration curve sample is produced by a method described below and subjected to absorptiometric measurement. In accordance with ASTM D3133-01, a calibration curve is created from the result of the absorptiometric measurement performed on the standard calibration curve sample. A measurement sample is then produced by a method described below and subjected to absorptiometric measurement. The weight of nitrocellulose contained in the measurement sample can be determined from the calibration curve described above and the result of the absorptiometric measurement performed on the measurement sample. The amount of lip release agent applied to the target region can be determined by dividing the weight by the area of the target region.

When the component of the lip release agent is other than nitrocellulose, its content can be measured in a similar manner, for example, by replacing the acetone described below with a solvent capable of dissolving the component and shifting the absorption wavelength.

<Production of Standard Sample of Calibration Curve>

(1) Approximately 6 g of standard sample (lip release agent before application) is placed in a container such as a recovery flask, and concentrated by evaporating the volatile components using an evaporator.

(2) The resulting non-volatile component is transferred to a 100 ml volumetric flask with a pipette while dissolving in acetone and diluted with acetone to 100 ml.

(3) Four 50 ml recovery flasks are prepared and 0, 1, 3 and 5 ml of the solution obtained in (2) are placed in the respective recovery flasks. Then, 10, 9, 7 and 5 ml of acetone are added so that the total amount is 10 ml in each of the recovery flasks. Then, 10 ml of 10% KOH is added to each of the recovery flasks. The recovery flasks are placed in cooling tubes and refluxed for 1 hour in a constant temperature water bath at 60 °C.

(4) After refluxing, the solutions are cooled to room temperature in ice and filtered using filter paper. The resulting filtrate is placed in a 50 ml volumetric flask and diluted with a mixed acetone/water solution (weight ratio 2/1).

<Production of Measurement Sample (for the First Region)>

(1) The tipping paper from the wrapped portion is removed from the non-heated tobacco product and the first region is cut and shredded. The shredded pieces of tipping paper are placed in a container, such as an Erlenmeyer flask, and 100 ml of acetone is added. Ultrasonic extraction is then performed for 30 minutes.

(2) The resulting extract is transferred to a 300 ml recovery flask and the acetone is evaporated using an evaporator. Then, 10 ml of acetone and 10 ml of 10% KOH are added and refluxed for 1 hour in a hot water bath at 60 °C.

(3) The recovery flask is cooled to room temperature in ice and filtered. The resulting filtrate is placed in a 50 ml volumetric flask and diluted with a mixed acetone/water solution (weight ratio 2/1).

<1-3. Part of Tobacco Stick>

The structure of the tobacco rod portion 10 is not particularly limited and may be of a general structure. For example, the tobacco rod portion 10 may be obtained by wrapping a tobacco filler with wrapping paper.

[Tobacco Loading]

The structure of the tobacco filler is not particularly limited, and may be, for example, a structure composed of a composition containing chopped tobacco (hereinafter also referred to as the first tobacco filler), a structure composed of a plurality of tobacco sheets described later (hereinafter also referred to as the second tobacco filler), or a structure composed of a single tobacco sheet (hereinafter also referred to as the third tobacco filler).

The tobacco rod portion (also referred to simply as "tobacco stick" in this specification) is preferably rod-shaped. In such a case, the aspect ratio, which is the ratio of the height of the tobacco rod portion in the longitudinal direction to the width of the bottom surface of the tobacco rod portion, is preferably 1 or more.

The shape of the bottom surface of the tobacco rod portion is not limited and may be, for example, a polygonal shape, a rounded polygonal shape, a circular shape, or an elliptical shape. When the bottom surface is circular, the width is the diameter. When the bottom surface is elliptical, the width is the length along the principal axis. When the bottom surface is polygonal or rounded polygonal, the width is the diameter of a circumscribed circle or the length along the principal axis of a circumscribed ellipse. In the embodiment illustrated in Fig. 1, for example, the bottom surface is circular and, therefore, the width is its diameter. The diameter is the width, and the length in a direction orthogonal to the bottom surface is the height. The height and width of the tobacco filler included in the tobacco rod portion are preferably about 12 to 70 mm and about 4 to 9 mm, respectively.

The tobacco stick portion may include a portion that accommodates, for example, a heating element for heating the heated tobacco product without combustion.

The first batch will now be described. The chopped tobacco material contained in the first batch is not particularly limited, and a known material such as lamina and midrib may be used. The material may be obtained by crushing and uniformizing dried tobacco lamina into particles having an average particle size of 20 to 200 µm, forming the particles into a lamina (hereinafter also referred to simply as a uniformized lamina), and cutting the uniformized lamina. Alternatively, a so-called strand type may be employed in which a uniformized lamina having a length similar to that of the tobacco rod portion in the longitudinal direction of the tobacco rod portion is cut in a direction substantially parallel to the longitudinal direction of the tobacco rod portion into pieces with which the tobacco rod portion is filled. The chopped tobacco pieces preferably have a width of 0.5 to 2.0 mm to ensure proper filling of the tobacco rod portion with them. When the tobacco rod portion has a circumference of 22 mm and a length of 20 mm, the content of the tobacco filler in the tobacco rod portion may be 200 to 800 mg/rod portion, and is preferably 250 to 600 mg/rod portion. Tobacco sheets of various types of tobacco may be used to produce the chopped tobacco and the uniformized sheet. For example, flue-cured tobacco, burley tobacco, oriental tobacco, domestic tobacco, other types of Nicotiana tabacum or Nicotiana rustica, or a mixture thereof may be used. The mixture may be obtained by mixing the tobacco types described above as appropriate to produce a desired flavor. Details about the tobacco types are described in "Tobacco Encyclopedia, Tobacco Academic Studies Center, 2009.3.31." There are a plurality of known methods for manufacturing the uniformized sheet, i.e., for crushing tobacco sheets into pieces and forming the pieces into a uniformized sheet. The first method is to produce a sheet using a papermaking process. The second method involves mixing a suitable solvent, such as water, and crushed tobacco sheets to form a uniform mixture, casting the uniform mixture onto a metal plate or a metal plate belt, and drying the uniform mixture to produce a cast sheet. The third method involves mixing a suitable solvent, such as water, and crushed tobacco sheets to form a uniform mixture, and forming the uniform mixture into a sheet by extrusion molding. The types of uniformized sheet are described in detail in "Tobacco Encyclopedia, Tobacco Academic Studies Center, 2009.3.31."

The water content of the tobacco filler can be between 10 and 15% by weight of the total amount of the tobacco filler, and preferably between 11 and 13% by weight of the total amount of the tobacco filler. When the water content is within these ranges, the formation of spots on the wrapping paper can be suppressed and the machinability during the production of the tobacco stick portion can be improved.

The size and preparation method of the chopped tobacco contained in the first batch of tobacco are not particularly limited. For example, chopped tobacco obtained by chopping dry tobacco leaves to a width of 0.5 to 2.0 mm may be used.

When chopped tobacco is formed by crushing a uniform sheet, the dried tobacco sheets can be crushed into uniform particles with an average particle size of 20 to 200 µm, and the particles can be formed into a sheet. The sheet can then be crushed to a width of 0.5 to 2.0 mm.

The first tobacco filler contains an aerosol source material that generates aerosolized smoke. The type of aerosol source material is not particularly limited, and extracts of various natural products and/or components thereof can be selected according to the intended use. Examples of the aerosol source material include glycerol, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.

The content of the aerosol source material in the first tobacco batch is not particularly limited. To generate a sufficient aerosol and impart a good smoke flavor, the content of the aerosol source material is typically 5% by weight or more, preferably 10% by weight or more, and is typically 50% by weight or less, preferably 15 to 25% by weight, of the total amount of the tobacco batch.

The first load of tobacco may contain a flavor. The type of flavor is not particularly limited, and in order to impart a good smoke flavor, acetanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peruvian 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, p-carotene, carrot juice, L-carvone, p-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, acid Cinnamic acid, Cinnamyl alcohol, Cinnamyl cinnamate, Citronella oil, DL-Citronellol, Clary Sage extract, Cocoa, Coffee, Cognac oil, Coriander oil, Cuminaldehyde, Davana oil, 5-Decalactone, Y-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, Levulinate ethyl, 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, genet absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, Y-heptalactone, Y-hexalactone, hexanoic acid, cis-3-hexen-1-ol, hexyl acetate, hexyl alcohol, hexyl phenylacetate, 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, p-ionone, isoamyl acetate, isoamyl butyrate, isoamyl phenylacetate, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon deterpene oil, lemongrass extract, linalool, linalyl acetate, lovage root oil, maltol, maple syrup, menthol, menthone, L-menthyl acetate, para-methoxybenzaldehyde, methyl-2-pyrrolyl ketone, anthranilate Methyl, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, molasses, myristic acid, nerol, nerolidol, Y-nonalactone, nutmeg oil, 5-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, w-pentadecalactone, peppermint oil, Paraguay petitgrain oil, phenethyl alcohol, phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenyl guaiacum, propyl acetate, 3-propylidene phthalide, plum juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood oil, spearmint oil, styrax absolute, oil of calendula, tea distillate, α-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-1-cyclohexenyl)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, Y-undecalactone,<y>-valerolactone, vanilla extract, vanillin, Veratraldehyde, violet leaf absolute, N-ethyl-p-menthane-3-carboxamide (WS-3), and ethyl acetate-2-(p-menthane-3-carboxamide) (WS-5). Menthol is particularly preferred. These flavors may be used alone or in combination with two or more.

The flavor content in the first tobacco filler is not particularly limited. To impart a good smoke flavor, the content is typically 10,000 ppm or more, preferably 20,000 ppm or more, and more preferably 25,000 ppm or more. Furthermore, the content is typically 50,000 ppm or less, preferably 40,000 ppm or less, and most preferably 33,000 ppm or less.

The charge density of the first tobacco charge is not particularly limited. To ensure the performance of the heated-without-burning tobacco product and impart a good smoke flavor, the charge density is typically 250 mg/cm3 or more, and preferably 320 mg/cm3 or more. Furthermore, the charge density is typically 800 mg/cm3 or less, and preferably 600 mg/cm3 or less.

The tobacco stick portion is formed by wrapping the wrapping paper around the first tobacco filler described above.

The second tobacco charge includes a plurality of concentrically arranged tobacco sheets. In this specification, the term "concentrically arranged" means that all the tobacco sheets are arranged such that their centers are in substantially the same position. In this specification, the term "sheet" means an object having a pair of principal surfaces that are substantially parallel to each other and lateral surfaces. The second charge is formed by concentrically rolling a plurality of tobacco sheets in a direction orthogonal to the longitudinal direction of the heated-without-combustion tobacco product.

The base material of the sheets may be, for example, a tobacco material such as snuff. The tobacco material is particularly preferred. Each of the tobacco sheets is preferably formed by a sheet of base material made from the tobacco material and having a component capable of generating flavor as needed. The tobacco sheet generates an aerosol when heated. An aerosol source, for example, a polyol such as glycerol, propylene glycol, or 1,3-butanediol, may be added as an aerosol source material. The amount of the aerosol source material added is preferably 5 to 50% by weight, more preferably 15 to 25% by weight, of the weight of the dry tobacco sheets.

The tobacco sheets before being arranged concentrically will be described below.

Tobacco sheeting can be suitably manufactured by a known method, such as papermaking, a suspension method, or rolling. The standardized sheeting described in the description of the first tobacco charge can also be used.

In the case of papermaking, a tobacco sheet can be manufactured by a method that includes the following steps. 1) The dried tobacco sheets are coarsely crushed and extracted with water, and the water extract is separated from the residue. 2) The water extract is dried under reduced pressure and concentrated. 3) Pulp is added to the residue, and the result is fibrous with a refiner and subjected to a papermaking process. 4) The concentrated water extract is applied to a sheet obtained by the papermaking process, and it is dried. In this way, a tobacco sheet is obtained. In this case, a step of removing some of the components such as nitrosamines can also be performed (see Japanese Unexamined Patent Application Publication (PCT application translation) No. 2004-510422).

In the case of a suspension method, a tobacco sheet can be manufactured by a method that includes the following steps. 1) Water, pulp, a binder, and crushed tobacco sheets are mixed. 2) The mixture is spread (strained) into a thin layer and dried. In this case, a step to remove some of the components, such as nitrosamines, can also be performed by irradiating the suspension of the mixture of water, pulp, the binder, and the crushed tobacco sheets with ultraviolet rays or X-rays.

Alternatively, as described in International Publication No. 2014/104078, a tobacco sheet in the form of a nonwoven fabric can be used, manufactured by a method comprising the following steps: 1) Sheets of powdered tobacco and a binder are mixed. 2) The mixture is placed between sheets of nonwoven fabric. 3) The resulting stack is formed into a particular shape by heat fusion to form a tobacco sheet in the form of a nonwoven fabric.

The types of tobacco sheets used as material for the methods described above may be the same as those mentioned above in the description of the first load.

The composition of the tobacco sheet is not particularly limited. For example, the content of the tobacco material (tobacco sheets) is preferably 50 to 95% by weight of the total weight of the tobacco sheet. The tobacco sheet may contain a flavoring. Examples of the binder include guar gum, xanthan gum, carboxymethylcellulose (CMC), and carboxymethylcellulose sodium salt (CMC-Na). The amount of the binder is preferably 1 to 20% by weight of the total weight of the tobacco sheet. The tobacco sheet may also contain other additives. Examples of the additives include a filler, such as pulp. A plurality of tobacco sheets are used in this specification. The tobacco sheets may all have the same composition or physical properties. Alternatively, some or all of the tobacco sheets may have different compositions or physical properties.

The second tobacco batch can be manufactured by preparing a plurality of tobacco sheets having different widths, stacking the tobacco sheets so that their width decreases from bottom to top to form a stack, and rolling the stack through a forming tube. According to this manufacturing method, the tobacco sheets extend in the longitudinal direction and are arranged concentrically around the longitudinal axis. A fitting portion extending in the longitudinal direction can be arranged between the longitudinal axis and the innermost tobacco sheet.

According to this manufacturing method, the stack is preferably prepared so that the tobacco sheets adjacent to each other have regions without contact between them after the rolling process.

When non-contact regions (voids) are present between the tobacco sheets, where the tobacco sheets are not in contact with each other, flavor flow paths are provided so that flavor components can be efficiently delivered. Since heat from the heater can be transmitted to the outer tobacco sheets through portions of the tobacco sheets that are in contact with each other, heat can be transmitted efficiently.

Non-contact regions where the tobacco sheets are not in contact with one another can be formed between the tobacco sheets, for example, by using embossed tobacco sheets, by stacking the tobacco sheets without joining the adjacent tobacco sheets over their entire surface, or by stacking the tobacco sheets with the adjacent tobacco sheets partially joined together. Alternatively, the tobacco sheets can be stacked such that the adjacent tobacco sheets are only weakly joined over all or part of their surface, such that the tobacco sheets are separated from each other after the rolling process.

To prepare the tobacco stick part, including the wrapping paper, the wrapping paper described above can be provided at the bottom of the stack.

The fitting part can be formed by placing a tubular dummy, such as a mandrel, on top of the stack and removing the dummy after the second tobacco charge has been formed.

The thickness of each tobacco sheet is not particularly limited. However, to achieve a good balance between heat transfer efficiency and strength, the thickness is preferably 200 to 600 g/m². The tobacco sheets can be of the same thickness or of different thicknesses.

The number of tobacco sheets constituting the second tobacco charge is not particularly limited and may be, for example, two, three, four, five or six.

The third tobacco filler consists of a single folded tobacco sheet. The sheet has a length similar to the length of the tobacco rod portion in the longitudinal direction. The sheet can be a so-called gathered sheet, which is folded several times along lines parallel to the longitudinal direction of the tobacco rod portion. To achieve a good balance between heat transfer efficiency and strength, the sheet thickness is preferably 200 to 600 g/m².

The base material of the sheet used as the third tobacco filler may be similar to that of the second tobacco filler.

[Wrapping Paper]

The structure of the wrapping paper is not particularly limited, and general-purpose wrapping paper can be used. For example, the base paper of the wrapping paper can be cellulose fiber paper, more specifically, hemp, wood, or a mixture thereof. The term "wrapping paper" referred to herein means paper for wrapping tobacco cargo.

The wrapping paper may contain a filler, and the type of filler is not limited. The filler may be, for example, a metal carbonate such as calcium carbonate or magnesium carbonate, a metal oxide such as titanium oxide or aluminum oxide, a metal sulfate such as barium sulfate or calcium sulfate, or a metal sulfide such as zinc sulfide, quartz, kaolin, talc, diatomite, or gypsum. In particular, calcium carbonate is preferably present to improve whiteness and opacity and increase the heating rate.

The filler content ratio in the wrapping paper is not particularly limited and is typically 1 to 50% by weight, preferably 5 to 45% by weight, more preferably 10 to 42% by weight, and particularly preferably 20 to 40% by weight. The calcium carbonate content, for example, can be determined by measuring the ash content or by quantifying the calcium ions after extraction.

When the content ratio is below the lower limits of the ranges described above, the wrapping paper burns easily. When the content ratio is above the upper limits of the ranges described above, the wrapping paper's strength is greatly reduced, and its wrapping properties are degraded.

Various auxiliary agents other than the base paper and filler can be added to the wrapping paper. For example, a water resistance improving agent can be added to improve water resistance. The water resistance improving agent contains a wet paper reinforcing agent (WS agent) and a sizing agent. Examples of the wet paper reinforcing agent include urea formaldehyde resin, melamine formaldehyde resin, and polyamide epichlorohydrin (PAE). Examples of the sizing agent include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol having a degree of saponification of 90% or more.

A paper-reinforcing enhancer can be added as an auxiliary agent. The paper-reinforcing enhancer can be, for example, polyacrylamide, cationic starch, oxidized starch, CMC, polyamide-epichlorohydrin resin, or polyvinyl alcohol. In particular, a very small amount of oxidized starch is known to increase air permeability (Japanese Unexamined Patent Application Publication No. 2017-218699).

Wrapping paper may be coated as appropriate.

A coating agent may be applied to at least one of the two surfaces, i.e. the front and back surfaces, of the wrapping paper. Any coating agent may be used, but a coating agent capable of forming a film on a surface of the paper and reducing liquid permeability is preferred. Examples of the coating agent include alginic acid and salts thereof (e.g. sodium salts), polysaccharides such as pectin, cellulose derivatives such as ethylcellulose, methylcellulose, carboxymethylcellulose and nitrocellulose, and starch and derivatives thereof (e.g. ether derivatives such as carboxymethyl starch, hydroxyalkyl starch and cationic starch and ester derivatives such as starch acetate, starch phosphate and starch octenylsuccinate).

The grammage of wrapping paper is typically 20 to 45 g/m2 and preferably 25 to 40 g/m2. When the grammage is within these ranges, adequate strength and wrapping properties can be achieved.

The air permeability of the wrapping paper is typically 0 to 120 Coresta units, preferably 5 to 100 Coresta units, and most preferably 10 to 80 Coresta units. When the air permeability is within these ranges, adequate smoke strength and flavor can be achieved.

<1-4. Nozzle Part>

The structure of the heated-not-burned tobacco product 1 is not particularly limited and may be a general structure. For example, referring to Fig. 3, a cooling portion 15, a filter portion 16, or a combination thereof may be provided.

[Cooling Part]

The structure of the cooling portion is not particularly limited, as long as the cooling portion serves to cool the mainstream tobacco smoke. For example, the cooling portion may be formed by rolling thick paper into a cylindrical shape. In such a case, the cylindrical shape has a hollow space inside, and the vapor containing the aerosol source material and tobacco flavor components comes into contact with the air in the hollow space and is cooled.

As illustrated in Fig. 3, the heated-not-burned tobacco product 1 may have an opening (not shown) through which air is introduced from the outside into the cooling portion 15 and a portion of the tipping paper 12 that may be coated with the lip release agent. The opening allows air to flow into the cooling portion 15 from the outside during use. Accordingly, the vapor containing the aerosol source material and tobacco flavor components generated when the tobacco rod portion is heated comes into contact with air from the outside, and is reduced in temperature and liquefied. Therefore, the generation of an aerosol can be accelerated. As illustrated in Fig. 4 and as mentioned above in the description of the third form in "1-1. Wrapped Part", when the cooling part 15 has a plurality of openings 18, the openings 18 are arranged in the circumferential direction of the outer peripheral surface of the cooling part 15. The number of the openings 18 arranged in the circumferential direction is not particularly limited, and may be two or more. Although the cooling part illustrated in Fig. 4 has a cylindrical shape with a hollow space 17, the shape of the cooling part is not limited to this. The boundary between the first region and the second region is not illustrated in Fig. 4.

The diameter of the openings is preferably 100 to 1,000 gm, and more preferably 300 to 800 gm. The openings are preferably substantially circular or substantially elliptical. When the openings are substantially elliptical, their diameter is the length along the principal axis.

As illustrated in Fig. 4, the openings in the cooling portion may be formed to extend through the nozzle paper 12 and the lip release agent 13. The nozzle paper 12 and the lip release agent 13 may not have openings, but preferably have openings to enhance the cooling effect.

As mentioned above in the description of the third form in "1-1. Wrapped Part", the openings are arranged in the circumferential direction of the outer peripheral surface of the cooling part. The number of sets of openings arranged in the circumferential direction (also referred to as "circumferential arrangement sets") is not particularly limited and may be two or more. In this case, since the circumferential arrangement sets are generally arranged outside the lip contact region, one of the circumferential arrangement sets that is closest to the nozzle-side end serves as the circumferential arrangement set at the boundary between the first region and the second region.

The interior space of the cooling section can be filled with a sheet-like material, such as paper, a polymer film, or a metal foil, which is then joined together. In this case, the vapor can be cooled using the specific heat of these materials.

The height of the cooling portion in the longitudinal direction is not particularly limited. To ensure sufficient cooling performance, the height is typically 5 to 40 mm, preferably 10 to 35 mm, and more preferably 15 to 30 mm.

[Part of Filter]

The structure of the filter portion 16 is not particularly limited, as long as the filter portion 16 serves as a general filter. For example, the filter portion 16 may be formed by processing cellulose acetate tow into a cylindrical shape. The single fiber fineness and the total fineness of the cellulose acetate tow are not particularly limited. However, when the filter portion has a circumference of 22 mm, the single fiber fineness is preferably 5 to 12 g per 9,000 m, and the total fineness is preferably 12,000 to 30,000 g per 9,000 m. The cross-sectional shape of the cellulose acetate tow fibers may be a Y-shaped cross-section or an R-shaped cross-section. When the filter is filled with the cellulose acetate tow, triacetin may be added in an amount of 5 to 10% by weight of the weight of the cellulose acetate tow to increase the hardness of the filter.

Although the filter portion 16 is composed of a single segment in Fig. 3, the filter portion 16 may instead be composed of a plurality of segments. When the filter portion 16 is composed of a plurality of segments, for example, a hollow segment having a central hole or the like may be provided on an upstream side (tobacco stick side), and a segment provided on a downstream side (side from which the user inhales) may be an acetate filter having a mouthpiece cross-section filled with the cellulose acetate tow. Such a structure prevents unnecessary loss of the generated aerosol and improves the appearance of the heated-not-burning tobacco product. Considering a change in the inhalation sensation and the sensation of holding the heated-not-burning tobacco product in the mouth, the acetate filter may be provided on the upstream side, and the hollow segment having a central hole or the like may be provided on the downstream side. A paper filter filled with sheet-shaped pulp paper may be provided instead of the acetate filter.

In filter manufacturing, the adjustment of airflow resistance and the addition of additives (e.g., known absorbents, flavors, and flavor retainers) can be appropriately designed.

<2. Electrically Heated Tobacco Product>

An electrically heated tobacco product according to one embodiment includes an electric heating device and the heated tobacco product described above. The electric heating device includes a heating element, a battery unit that serves as a power source for the heating element, and a control unit for controlling the heating element. The heated tobacco product is inserted into the electric heating device such that the heated tobacco product comes into contact with the heating element.

The electrically heated tobacco product may be configured such that an outer peripheral surface of the non-combustion heated tobacco product is heated, as illustrated in Fig. 5, or such that an inner portion of the tobacco rod portion of the non-combustion heated tobacco product is heated, as illustrated in Fig. 6. Although an electric heating device 2 illustrated in Figs. 5 and 6 has air introduction holes, the air introduction holes are not illustrated. An electrically heated tobacco product will be described with reference to Fig. 5.

To use an electrically heated tobacco product 3, the above-described heated tobacco product 1 is inserted into the electric heating device 2 such that the heated tobacco product 1 comes into contact with a heating element 23 arranged in the electric heating device 2.

The electric heating device 2 has a body 22 made of, for example, resin, and includes a battery unit 20 and a control unit 21 arranged in the body 22.

When the non-combustion heated tobacco product 1 is inserted into the electric heating device 2, the outer peripheral surface of the tobacco rod portion comes into contact with the heating element 23 of the electric heating device 2. Then, the entire outer peripheral surface of the tobacco rod portion and a portion of the outer peripheral surface of the wrapped portion come into contact with the heating element.

The heating element 23 of the electric heating device 2 generates heat under the control of the control unit 21. The generated heat is transmitted to the tobacco rod portion of the heated tobacco product without combustion. Consequently, the aerosol source material, flavor components, and other components contained in the tobacco filler of the tobacco rod portion are vaporized.

The heating element may be, for example, a sheet-shaped heater, a flat-plate heater, or a tubular heater. The sheet-shaped heater is a flexible heater in the form of a sheet and may be, for example, a heater comprising a film (with a thickness of about 20 to 225 µm) made of a heat-resistant polymer, such as polyimide. The flat-plate-shaped heater is a rigid heater in the form of a flat plate (with a thickness of about 200 to 500 µm) and may be, for example, a heater having a resistance circuit provided on a flat-plate substrate and serving as a heat-emitting portion. The tubular heater is a heater in the form of a hollow or solid tube (with a thickness of about 200 to 500 µm), and may be, for example, a heater having a resistance circuit provided on an outer peripheral surface of a tube made of, for example, metal and serving as a heat-generating portion. The heating element can, on the other hand, be a rod-shaped heating element or a cone-shaped heating element, made, for example, of metal and having a resistance circuit arranged therein that serves as a heat-generating part. The cross-sectional shape of the tubular heating element can be, for example, circular, elliptical, polygonal, or rounded polygonal.

When the outer peripheral surface of the non-combustion heated tobacco product is heated as illustrated in Fig. 5, the sheet-shaped heater, the flat plate-shaped heater, or the tubular heater described above may be used. When the tobacco rod portion of the non-combustion heated tobacco product is heated from the inside as illustrated in Fig. 6, the flat plate-shaped heater, the rod-shaped heater, or the cone-shaped heater described above may be used.

When the length of the tobacco rod portion in the longitudinal direction is L mm, the length of the heating element in the longitudinal direction may be in the range of L ± 5.0 mm. In order to sufficiently transfer heat to the tobacco rod portion and to sufficiently vaporize the aerosol source material, flavor components, and other components contained in the tobacco filler, that is, to ensure proper aerosol delivery, the length of the heating element in the longitudinal direction is preferably L mm or more. In order to reduce the generation of components that have an undesirable influence on, for example, the smoke flavor, the length of the heating element in the longitudinal direction 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 the heating temperature, at which the heating element heats the non-combustion heated tobacco product, can be set in advance for each of the electrically heated tobacco products. For example, settings can be made in advance so that, after the non-combustion heated tobacco product is inserted into the electric heating device, preliminary heating is performed for a predetermined time to increase the temperature of the outer peripheral surface of a portion of the non-combustion heated tobacco product inserted into the device to X (°C), and then the temperature is maintained at a constant temperature of X (°C) or less.

To supply an adequate amount of aerosol, the above-described temperature X (°C) is preferably 80°C or more and 400°C or less. More specifically, the temperature 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.

The temperature of the outer peripheral surface of the heated tobacco product without combustion during heating of said product by the electric heating device is measured by a method described below.

Vapor containing the aerosol source material, flavor components, and other components generated from the tobacco rod portion when the tobacco rod portion is heated by the heating element flows through the mouthpiece portion including the cooling portion and the filter portion and reaches the user's mouth.

<3. Smoking Test>

A smoking test is performed with reference to the Canadian Intensive Regimen (CIR) under the conditions described below.

For example, the electrically heated tobacco product described above is used. After insertion of the tobacco rod portion of the non-combustion heated tobacco product, the heater temperature is heated to 230°C in 17 seconds. This temperature is then maintained for 23 seconds and then held constant at a temperature in the range of 170°C to 175°C. After that, the smoking test is carried out by performing automatic smoking using a single-port automatic smoking machine manufactured by Borgwaldt KC Inc. at a flow rate of 55 cc per 2 seconds and smoking intervals of 30 seconds. The external air introduction holes formed on the outer periphery of the cooling portion are not covered during the smoking test. The mainstream tobacco smoke generated during the smoking test is collected by a Cambridge pad. After performing eight smoking operations, the Cambridge pad is removed.

<4. Method for Measuring the Temperature of the Outer Peripheral Surface of a Heated-Not-Burned Tobacco Product>

The temperature of the outer peripheral surface of the heated tobacco product without combustion during heating during heating of the heated tobacco product without combustion by the electric heating device is measured by the following method.

Before using the non-smoke heated tobacco product, thermocouples (manufactured by Toa Electric Inc., Model TI-SP-K) are attached to the outer peripheral surface of the wrapped portion of the non-smoke heated tobacco product to measure temperatures at the following five positions: a position of an end adjacent to the inlet of the heating element of the electric heating device (hereinafter also referred to as "point b2"); a position at a distance of 5.0 mm from the end adjacent to the inlet of the heating element toward the mouthpiece-side end (hereinafter also referred to as "point b1"); a position at a distance of 7.5 mm from the end adjacent to the inlet of the heating element toward the mouthpiece-side end (hereinafter also referred to as "point a3"); a position at a distance of 13.5 mm from the end adjacent to the inlet of the heating element toward the mouthpiece-side end (hereinafter also referred to as "point a2"); and a position at a distance of 15.5 mm from the end adjacent to the heating element inlet towards the nozzle-side end (hereinafter also referred to as "point a1"). The thermocouples are secured using pieces of polyimide tape (thickness 50 gm).

After inserting the non-smoking heated tobacco product to which the thermocouples are attached into the electric heating device, the maximum temperature at each of the measuring points under the heater temperatures mentioned above in <3. Smoking Test> is recorded as the outer peripheral surface temperature of the non-smoking heated tobacco product.

<5. TSNA measurement method>

The method for measuring the amount of TSNA in the heated-not-burned tobacco product is not particularly limited. For example, the measurement can be performed by adding a measuring object to a 0.1 M (mol/L) aqueous ammonium acetate solution, performing a stirring extraction (180 rpm, 60 min), and then filtering the extract through a glass fiber filter and subjecting the resulting filtrate to ion chromatography. The mobile phase can be an aqueous acetic acid solution and a solution of acetic acid in methanol.

The measurement object can be prepared by cutting the heated-not-burning tobacco product into pieces in a direction perpendicular to the longitudinal direction. Some or all of the pieces into which the heated-not-burning tobacco product is cut as described above can be used as the measurement object.

<6. Method for Measuring Nitric Nitrogen>

Nitric nitrogen is a substance that is generated after the decomposition of nitrocellulose.

The method for measuring the amount of nitric nitrogen in a heated-not-burned tobacco product is not particularly limited. For example, the measurement can be performed in accordance with ISO 15517:2003 under the following conditions.

• Analysis Device: Autoanalyzer (SYNCA 1H (manufactured by BL TEC K.K.))

• Preparation of the Analysis Sample: A paper material to be analyzed is cut into pieces of any size and distilled water is added. Extraction is then performed by shaking for a specified time, followed by filtration. The resulting filtrate is used.

• Analysis Procedure:

(1) A standard solution of nitric nitrogen and the test sample are placed in the autoanalyzer and distilled water is introduced through all the tubes. Distilled water is introduced until the air bubbles in the tubes are distributed at equal intervals.

(2) Bridge water is introduced through the reagent tube and a reference value is checked on the chart.

(3) The liquid flowing through each of the tubes is replaced by reagent. The reagent is introduced until the reference value stabilizes.

(4) Once the reference value has stabilized, an analysis is started.

(5) Once the analysis is completed, a calibration curve is created from the measurement value of the standard solution.

(6) The analysis sample is measured.

(7) A quantitative calculation is performed from the calibration curve obtained and the measurement result of the analysis sample.

The ratio of nitric nitrogen content can be calculated from Equation (1) given below.

Nitrogen Content Ratio (%) = ((C x V x 100) x 100)/m x 1,000 x 1,000 (I)

C: Nitric nitrogen content determined from the calibration curve (mg/l)

V: Amount of solution (ml)

m: Sample weight (g)

[Examples]

The present invention will be described in more detail by way of examples. However, the present invention is not limited to the description of examples, provided its essence is maintained.

<Example 1>

[Preparing the Nozzle Paper for the Wrapped Part]

A lip release agent (CHG LR T varnish produced by DIC Corporation) was prepared. Tipping paper manufactured by Nippon Paper Papylia Co., Ltd. (weight 37 g/mm2, thickness 40 pm) was used. The size of the prepared tipping paper was such that the wrapper circumference was 22 mm and the wrapper length was 40 mm.

The lip release agent described above was diluted with solvent (containing, for example, ethyl acetate). The resulting product was applied to the above-described tipping paper by printing and then dried to remove the solvent. This process was carried out so that the lip release agent was applied uniformly and the content thereof per unit area was 0.56 pg/mm2 in a region from the tipping-side end of the heated-not-burning tobacco product to a position 17 mm from the tipping-side end in the longitudinal direction of the heated-not-burning tobacco product. The lip release agent was not applied in a region from the position 17 mm away from the rod-side end in the longitudinal direction of the wrapped portion.

[Production of the Tobacco Stick Part]

Flavored shredded tobacco was prepared at a ratio of 2 g per 100 g and an aerosol source material (glycerol) mixed at a ratio of 40 g per 100 g as the tobacco filler. The tobacco filler was wrapped with wrapping paper (produced by Nippon Paper Papylia Co., Ltd., weight 35 g/m2, thickness 52 pm) using a high-speed wrapping machine.

The weight of the chopped tobacco was 0.8 g per piece, the circumference of the wrapper was 22 mm and the length of the wrapper was 68 mm.

The wrapped tobacco stick parts were placed in sealed plastic containers and stored in groups of 200 pieces for each level.

[Production of Heated-Not-Burned Tobacco Product]

The tobacco rod portion produced by the method described above was cut to a length of 20 mm. After that, the tobacco rod portion was manually wrapped with the prepared mouthpiece paper together with a support portion and a filter portion to form the wrapped portion. The support portion included a cooling portion, which was a 20 mm long paper tube with dilution air holes formed on its outer periphery, and an 8 mm long central hole filter with a through hole. The filter portion was 7 mm long and filled with cellulose acetate fibers. In this way, the heated tobacco product was produced without combustion.

Thermocouples (manufactured by Toa Electric Inc., Model TI-SP-K) were attached to the wrapped portion of the heated-not-burned tobacco product at five positions. The five positions were points a1, a2, a3, b1, and b2 described above in <4. Method for Measuring Outer Peripheral Surface Temperature of a Heated-Not-Burned Tobacco Product>. The thermocouples were attached using polyimide tape (thickness 50 µm) cut into pieces 10 mm x 5 mm in size. This is referred to as Example 1.

The dilution air holes correspond to the openings described above and are arranged in the circumferential direction at a position at a distance of 17 mm from the mouthpiece-side end of the heated-not-burning tobacco product in the longitudinal direction of the heated-not-burning tobacco product.

<Comparative Example 1>

A heated-not-burn tobacco product was produced in a manner similar to Example 1, except that when the wrapped portion was prepared as in Example 1, the lip release agent was uniformly applied to the mouthpiece paper over its entire surface so that the content thereof per unit area was 0.56 pg/mm2. In other words, the lip release agent was not applied to satisfy the following condition: (lip release agent content per unit area in the first region) = (lip release agent content per unit area in the second region). This is referred to as Comparative Example 1.

<Smoking Test>

Each of the heated-not-burn tobacco products according to Example 1 and Comparative Example 1 was subjected to a smoking test. The electrically heated tobacco product subjected to the smoking test had the same structure as that described above. After the tobacco rod portion of the heated-not-burn tobacco product was inserted, the heater temperature was heated to 230°C within 17 seconds. This temperature was then maintained for 23 seconds and then kept constant at a temperature in the range of 170°C to 175°C. Thereafter, the smoking test was carried out by performing automatic smoking using a single-port automatic smoking machine manufactured by Borgwaldt KC Inc. at a flow rate of 55 cc per 2 seconds and smoking intervals of 30 seconds. The external air introduction holes formed on the outer periphery of the cooling portion were not covered during the smoking test. Mainstream tobacco smoke generated during the smoking test was collected using a Cambridge pad. After eight smoking sessions, the Cambridge pad was removed.

During the smoking test, thermocouples attached to the wrapped portion of each heated-not-burning tobacco product at the five locations described above (points a1, a2, a3, b1, and b2) were used to measure the maximum temperature at each location on the outer peripheral surface of the wrapped portion of the heated-not-burning tobacco product. The results are shown in Table 1.

<TSNA Measurement>

The amount of TSNA contained in the heated tobacco product after the smoking test was measured by the following method.

After the smoking test, the heated tobacco product was divided into the following four regions (A) to (D).

(A) A region from the mouthpiece side end to a position at a distance of 27.5 mm from the mouthpiece side end toward the tobacco rod in the longitudinal direction of the heated non-combustion tobacco product (region including points a1, a2, and a3 in the temperature measurement described above).

(B) A region from the position at a distance of 27.5 mm in (A) to a position at a distance of 7.5 mm from the position at a distance of 27.5 mm toward the tobacco rod in the longitudinal direction of the heated tobacco product without combustion (region including points b1 and b2 in the temperature measurement described above).

(C) A region from the position at a distance of 7.5 mm in (B) to a position at a distance of 5 mm from the position at a distance of 7.5 mm toward an end of the tobacco rod in the longitudinal direction of the combustion-heated tobacco product (region in which the mouthpiece paper is present and which extends to the end of the tobacco rod side in Example 1 and Comparative Example 1).

(D) A region from the position at the distance of 5 mm in (C) to the end of the tobacco rod in the longitudinal direction of the heated tobacco product without combustion (region in which the mouthpiece paper is not present in Example 1 and Comparative Example 1).

Among the above-described four regions (A) to (D) of the heated-not-burned tobacco product, regions (A) to (C), which are regions of the wrapped portion, were used as measurement objects. The amount of TSNA in each of the measurement objects was measured by adding the measurement object to a 0.1 M (mol/L) aqueous ammonium acetate solution, performing a stirring extraction (180 rpm, 60 min), and then filtering the extract with a glass fiber filter and subjecting the resulting filtrate to ion chromatography. The mobile phase was an aqueous acetic acid solution and a solution of acetic acid in methanol. Table 1 shows the TSNA content in each of the measurement objects in Example 1 and Comparative Example 1.

[Measurement of Nitric Nitrogen]

The amount of nitric nitrogen in the heated tobacco product was measured according to ISO 15517:2003 under the following conditions.

• Analysis Device: Autoanalyzer (SYNCA 1H (manufactured by BL TEC K.K.))

• Preparation of the Analysis Sample: Similar to the TSANA measurement described above, after the smoking test, the heated-not-burned tobacco product was divided into the four regions (A) to (D) and cut into pieces of any size, to which 5 ml of distilled water was added. The extraction was then performed by shaking for 15 minutes, followed by filtration. The resulting filtrate was used.

• Analysis Procedure:

(1) A standard solution of nitric nitrogen and the test sample are placed in the autoanalyzer and distilled water is introduced through all the tubes. Distilled water is introduced until the air bubbles in the tubes are distributed at equal intervals.

(2) Bridge water is introduced through the reagent tube and a reference value is checked on the chart.

(3) The liquid flowing through each of the tubes is replaced by reagent. The reagent is introduced until the reference value stabilizes.

(4) After the reference value has stabilized, an analysis is started.

(5) Once the analysis is completed, a calibration curve is created from the measurement value of the standard solution.

(6) The analysis sample is measured.

(7) A quantitative calculation is performed from the calibration curve obtained and the measurement result of the analysis sample.

The ratio of nitric nitrogen content can be calculated from Equation (1) given below.

Nitrogen Content Ratio (%) = ((C x V x 100) x 100)/m x 1,000 x 1,000 (I)

C: Nitric nitrogen content determined from the calibration curve (mg/l)

V: Amount of solution (ml)

m: Sample weight (g)

[Degree of Gluing]

The degree of gluing can be measured under the following conditions:

Measuring Device: Surface and Bonding Tester Model EST 12 (manufactured by Nihon Rufuto Co., Ltd.)

Sample (Test Paper): Paper placed in an environment with a temperature of 23°C and a humidity of 50% RH for 24 hours and then cut to a size of 20 mm x 70 mm.

Measurement Method: The test paper was immersed in a test liquid (water) filling a measuring cell of the measuring device described above. From that moment on, low-energy ultrasonic waves were emitted in a thickness direction. In this specification, assuming that a measurement start time is the time when the test paper is completely immersed in the test liquid, the sizing degree is the time from the measurement start time to the time when a permeability peak is obtained at a maximum value (MAX value).

In Example 1, the measurement described above was performed on the second region of the wrapped portion of the heated-not-burned tobacco product prior to the smoking test. The degree of sizing was 0.476 seconds (average of multiple measurements). Similarly, in Comparative Example 1, the measurement described above was performed on the second region of the wrapped portion. The degree of sizing was 0.082 seconds (average of multiple measurements).

[Contact Angle]

The contact angle was measured under the following conditions:

Measuring Device: Contact Angle Meter Model DMC-MC3 (manufactured by Kyowa Electronic Instruments Co., Ltd.)

Sample (Test Paper): Paper placed in an environment with a temperature of 23°C and a humidity of 50% RH for 24 hours and then cut to a size of 20 mm x 70 mm

Measurement Method: The test paper was fixed to a glass slide with double-sided adhesive tape, and the contact angle was measured using the 0/2 method as a contact angle evaluation method with a liquid (water) droplet amount of 7 pL and a measurement start time of 1,000 ms.

In Example 1, the measurement described above was performed on the second region of the wrapped portion of the heated-not-burned tobacco product prior to the smoking test. The contact angle was 101.6° (average of multiple measurements). Similarly, in Comparative Example 1, the measurement described above was performed on the second region of the wrapped portion. The contact angle was 94.0° (average of multiple measurements).

[Table 1]

Table 1

Table 1 shows that in all regions (A) to (C), the amount of TSNA and the percentage of nitrate nitrogen are lower in Example 1 than in Comparative Example 1.

List of Reference Signals

1

heated-not-burned tobacco product

10

part of a tobacco stick

11

part of the nozzle

12a

nozzle paper (first region)

12b

nozzle paper (second region)

12

nozzle paper

13a

lip release agent (first region)

13b

lip release agent (second region)

13

lip release agent

14

line showing the boundary between the first region and the second region

15

cooling part

16

filter part

17

hollow space

18

opening

2

electric heating device

20

battery unit

21

control unit

22

body

23

heating element

3

electrically heated tobacco product

Claims (10)

1. A heated-not-burn tobacco product (1) comprising a tobacco rod portion (10), a mouthpiece portion (11) and a wrapped portion wherein the tobacco rod portion and the mouthpiece portion are wrapped with mouthpiece paper (12), wherein a lip release agent (13a, 13b) is applied to at least a portion of the tipping paper, wherein the wrapped portion consists of a first region (12a) and a second region (12b) in a longitudinal direction of the heated-not-combustion tobacco product, the first region including a tipping-side end of the heated-not-combustion tobacco product and the second region including a tobacco rod-side end, and Characterized by the fact that the first region and the second region satisfy the following condition (A): (A) (a content of the lip release agent per unit area in the first region (13a)) > (a content of the lip release agent per unit area in the second region (13b)). 2. The heated-not-burn tobacco product according to claim 1, wherein the first region is a region from the mouthpiece-side end of the heated-not-burn tobacco product to a position at a distance of 17 mm from the mouthpiece-side end of the heated-not-burn tobacco product in the longitudinal direction of the heated-not-burn tobacco product, and wherein the second region is a region from the position at a distance of 17 mm to the end of the tobacco stick side of the wrapped portion in the longitudinal direction. 3. The heated-not-burn tobacco product according to claim 1, wherein the first region is a region from the mouthpiece-side end of the heated-not-burn tobacco product to a position at a distance of 42.5% of a length of the wrapped portion in the longitudinal direction of the heated-not-burn tobacco product from the mouthpiece-side end of the heated-not-burn tobacco product, and wherein the second region is a region from the position at a distance of 42.5% from the end of the tobacco stick side of the wrapped portion in the longitudinal direction. 4. The heated-not-burn tobacco product according to claim 1, wherein the mouthpiece portion comprises a cooling portion and a filter portion. 5. The heated-not-burn tobacco product according to claim 4, wherein the cooling portion has a plurality of openings, and the plurality of openings are arranged in a circumferential direction of an outer peripheral surface of the cooling portion, wherein the first region is a region from the mouthpiece-side end of the heated-not-burning tobacco product to a position where the openings are arranged along a length of the wrapped portion in the longitudinal direction of the heated-not-burning tobacco product, and wherein the second region is a region from the position at which the openings are arranged to the end of the tobacco stick side of the wrapped portion in the longitudinal direction. 6. The heated-not-burned tobacco product according to any one of claims 1 to 5, wherein a ratio of the content of the lip release agent per unit area in the second region to the content of the lip release agent per unit area in the first region is 1/2 or less. 7. The heated-not-burn tobacco product according to claim 6, wherein the ratio of the content of the lip release agent per unit area in the second region to the content of the lip release agent per unit area in the first region is 1/4 or less. 8. The heated-not-burn tobacco product according to any one of claims 1 to 7, wherein the content of the lip release agent per unit area in the second region is less than 0.56 pg/mm2. 9. The heated-not-burn tobacco product according to any one of claims 1 to 8, wherein the lip release agent contains at least nitrocellulose or ethylcellulose. 10. An electrically heated tobacco product comprising an electric heating device and a heated tobacco product without combustion according to any one of claims 1 to 9, the electric heating device comprising a heating element, a battery unit serving as a power source for the heating element and a control unit for controlling the heating element, the heated tobacco product without combustion being inserted into the electric heating device such that the heated tobacco product without combustion comes into contact with the heating element.