WO2025214348A1 - Centrally-heated cigarette allowing for easy removal from heating device, and testing method - Google Patents

Abstract

A centrally-heated cigarette allowing for easy removal from a heating device, comprising: a tobacco section and a filter rod section, wherein the tobacco section and the filter rod section are connected by means of tipping paper and are collinearly arranged in the axis direction; the tobacco section is formed by encircling, wrapping and sleeving the outer surface of a tobacco substance portion (1) with a cigarette paper material by means of a wrapping material portion (3); and the inner side surface of the wrapping material portion (3) is further provided with an adhesive portion (2), so as to be adhered to the outer surface of the tobacco substance portion (1). Also provided is a method for testing the adhesive strength between the tobacco substance portion (1) and a heating element, and between the tobacco substance portion (1) and the wrapping material portion (3) after vaping. The adhesive portion (2) is merely added between the tobacco substance portion (1) and the wrapping material portion (3), and an adhesive material is easily obtained, has relatively low cost, and has small sensory impact. The present invention has the advantages that the centrally-heated cigarette provides good satisfaction and little impurity odor and the like, and ensures that the cigarette can be easily removed from the heating device after vaping and the tobacco substance section is not separated from the cigarette paper, thereby improving the vaping experience of consumers.

Description

A center-heated cigarette that is easy to remove from a heating device, and a testing method thereof

This application claims priority to Chinese patent application No. CN202410428189.8 filed on April 10, 2024, the contents of which are incorporated herein by reference in their entirety.

Technical Field

The present invention belongs to the technical field of heated cigarettes, and particularly relates to a center-heated cigarette that is easy to pull out of a heating device, and a testing method.

Background Art

Heated cigarettes use an external heat source to heat the tobacco, creating a vaporized smoke containing atomizers, flavor components, and added flavors, similar to that of traditional cigarettes, providing consumers with a sense of physical satisfaction. Because the tobacco in heated cigarettes is only heated, not burned, the harmful components and biological toxicity of the smoke are significantly reduced, resulting in significantly lower smoke levels, making heated cigarettes highly popular.

Based on the position of the heat source relative to the heated cigarette, heated cigarettes are divided into center-heated and circumferentially heated cigarettes. Due to circumferential heating, the overall heat source temperature is lower than that of center-heated cigarettes, resulting in higher temperatures at the periphery and lower temperatures at the center, resulting in a slightly less satisfying experience than center-heated cigarettes. Furthermore, the heat source directly contacts and heats the cigarette paper, resulting in a slightly stronger "woody" smell and other odors like burning paper. In terms of sensory quality, center-heated cigarettes are superior to circumferentially heated cigarettes.

However, when a center-heated cigarette is smoked, the heat source of the heating device directly contacts and heats the tobacco material part, which is heated to carbonize, sinter, and coke, and is prone to adhere tightly to the heating element. When the cigarette is finished smoking and pulled out of the heating device, the cigarette will be difficult to pull out, the tobacco material section will separate from the cigarette paper, and the entire tobacco material will remain in the heating chamber of the heating device, making cleaning difficult and greatly reducing the consumer's smoking experience.

Summary of the Invention

To address the technical problem of center-heated cigarettes remaining in the heated smoking device after smoking, the present invention provides a center-heated cigarette that is easy to remove from the heated smoking device. While maintaining the advantages of center-heated cigarettes, such as a high satisfaction level and low odor, the cigarette is easily removed from the heated smoking device after smoking, ensuring that the tobacco material remains attached to the cigarette paper, thereby enhancing the consumer's smoking experience. Furthermore, the present technical solution provides a method for characterizing the adhesion between the tobacco portion and the heating element, and between the tobacco material portion and the wrapping material portion, of a heated cigarette after smoking.

The present invention provides a center-heated cigarette that is easy to pull out of a heating smoking device. The specific technical solution is as follows: a tobacco segment, a filter rod segment;

The tobacco segment and the filter rod segment are connected by tipping paper and arranged collinearly along the axis direction;

The tobacco segment is formed by wrapping the cigarette paper material with the covering material portion and sheathing it on the outer surface of the tobacco material portion;

The inner side surface of the covering material portion is further provided with an adhesive portion for bonding with the outer surface of the tobacco material portion.

Preferably, the coating area of the adhesive portion on the inner side surface of the covering material portion is 10%-60% of the area of the tobacco material portion projected onto the inner side surface of the covering material portion.

Preferably, the tobacco material portion is made of one of reconstituted tobacco leaves and filamentous tobacco leaves, or a mixture thereof.

Preferably, the reconstituted tobacco specifically includes: filamentous roller-pressed reconstituted tobacco and filamentous thick pulp reconstituted tobacco, which are made from one of them and a combination thereof.

Preferably, an atomizer is further added to the reconstituted tobacco leaves, and the atomizer is made of one of glycerol and propylene glycol, or a combination thereof.

Preferably, the coating pattern of the adhesive portion on the inner side surface of the covering material portion is one of: points, lines, and surfaces.

Preferably, the bonding portion is provided on the inner side surface of the covering material portion along the circumference of the outer surface of the tobacco material portion.

Preferably, the bonding portions are evenly distributed on the inner side surfaces of the covering material portion.

Preferably, the bonding portion is made of water-based adhesive or hot-melt adhesive or a combination thereof.

A method for testing center-heated cigarettes with easily removable heated smoking devices, comprising the following steps:

S1. Covering the end surface of the tobacco material portion with a heat-resistant film and tightly fixing it on the outer surface of the tobacco segment;

S2. After the tobacco segment is smoked, the tobacco segment is fixed, and the heating device is pulled out to measure the maximum extraction force N1 of the heating device. The maximum extraction force N1 can represent the adhesion strength between the tobacco segment and the heating device.

S3. Tear off the film on the end surface of the tobacco segment, fix the tobacco segment, pull out the tobacco material portion, and measure the maximum pull-out force N2 of the tobacco material portion at this time. The maximum pull-out force N2 can represent the adhesion strength between the tobacco material portion and the covering material portion.

In order to solve the problem in the current prior art that when a heated cigarette is pulled out of the heated smoking device after smoking is completed, the cigarette is difficult to pull out, the tobacco material section is separated from the cigarette paper, and the whole remains in the heating chamber of the heated smoking device, making cleaning difficult, the present invention adds an adhesive portion between the tobacco material portion and the coating material portion, which can be realized by existing cigarette production equipment and processes, without the need for new equipment or modification or additional processes. While maintaining the advantages of center-heated cigarettes such as good satisfaction and less impurities, when the cigarette is pulled out of the heated smoking device after smoking is completed, the test method provided in this application shows that the adhesion force N1 between the tobacco portion and the heating element after smoking is significantly smaller than the adhesion force N2 between the tobacco material portion and the coating material portion. This makes it easy to pull out the cigarette as a whole, and the tobacco material section does not separate from the cigarette paper, thereby improving the consumer's smoking experience.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic cross-sectional view of a centrally heated cigarette with an easily removable heating device in a specific embodiment;

FIG2 is a schematic diagram of the unfolded structure of the center-heated cigarette in FIG1 , which is easy to pull out of the heating smoking device;

FIG3 is a schematic cross-sectional view of a center-heated cigarette with an easily removable heating device in another embodiment;

FIG4 is a schematic diagram of the unfolded structure of the center-heated cigarette in FIG3 , which is easy to pull out of the heating smoking device;

FIG5 is a schematic cross-sectional view of a center-heated cigarette with an easily removable heating device in another embodiment;

FIG6 is a schematic diagram of the unfolded structure of the center-heated cigarette in FIG5 , which is easy to pull out of the heating smoking device.

The specific reference numerals are as follows:
1. Tobacco material part; 2. Adhesive part; 3. Covering material part.

DETAILED DESCRIPTION

In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

The following describes the technical solution of the present invention, which provides a center-heated cigarette that is easy to pull out of the heating device. The specific structure of the center-heated cigarette includes: a tobacco segment, a filter rod segment;

The tobacco segment and the filter rod segment are connected by tipping paper and are arranged collinearly along the central axis to form a complete cigarette structure for consumers to smoke. The tobacco segment is formed by a wrapping material portion 3 that surrounds and wraps around the outer surface of the tobacco material portion 1. Specifically, the wrapping material portion 3 is a cigarette paper material that is attached to the tobacco material portion 1. The tobacco segment and the filter rod segment are cylindrical structures with the same diameter, which is convenient for consumers to take out from the cigarette box.

The present invention also connects the tobacco material part 1 by arranging an adhesive part 2 on the inner side surface of the covering material part 3, so that when the covering material and the tobacco material part are relatively displaced after the puffing is completed, in addition to the friction force, the adhesive part 2 also provides a pulling force; in addition to using the adhesive part 2 as a tensile force, the area size of the adhesive part 2 is also one of the important improvements of the present technical solution. In the present technical solution, the coating area of the adhesive part 2 on the inner side surface of the covering material part 3 is 10%-60% of the area of the tobacco material part 1 projected onto the inner side surface of the covering material part 1; for the coating area of the adhesive part 2, the inventor has experimentally summarized that as long as the coating area of the adhesive part 2 is within 10%-60%, it can satisfy that the bonding force between the tobacco material part 1 and the covering material part 3 is greater than the bonding force between the tobacco material part 1 and the heating element, thereby avoiding adhesion on the heating element.

Compared with the prior art, whether it is traditional cigarettes or heated cigarettes, the wrapping material is only wrapped around the outside of the tobacco material part, and there is a simple mechanical wrapping relationship between the wrapping material and the tobacco material part. No substance is added or applied, and there is no adhesion between them. When relative displacement occurs between the wrapping material and the tobacco material part, only friction exists, and the friction force is often smaller than the adhesion force between the tobacco material part 1 and the heating element.

It has been found that after smoking from a centrally heated smoking device, the tobacco components of the heated cigarettes adhere closely and strongly to each other. The tobacco segment is a cylindrical, integral unit. Due to the continuous heating of the central heat source element of the heated smoking device at 300°C to 350°C for several minutes, the tobacco components carbonize, sinter, and coke, tightly adhering to the heating element. At the same time, the tobacco components within the tobacco segment also adhere closely and strongly to each other. Furthermore, the surface of the central heat source element is relatively flat, compared to the tobacco components themselves, while the tobacco components may overlap, intertwine, entangle, and adhere to each other. Therefore, after smoking a cigarette, the tobacco components adhere less closely to the heating element than to each other within the tobacco segment.

The present technical solution is based on the above findings of the inventors and through force analysis of the central heated cigarette when it is pulled out. It is found that since the tobacco segment after being smoked through the central heated smoking device is a columnar whole in which the tobacco material parts are closely and strongly adhered to each other, and the degree to which its tobacco part is tightly adhered to the heating element is less than the degree of adhesion between the tobacco material parts inside the tobacco part, it is only necessary to add the bonding part 2 between the tobacco material part 1 and the wrapping material part 3, and provide a material with bonding ability so that the tobacco material part 1 and the wrapping material part 3 can be better bonded, and the bonding force between the tobacco material part 1 and the wrapping material part 3 is greater than the bonding force between the tobacco material part 1 and the heating element. This can achieve that when the cigarette is pulled out of the heated smoking device after smoking is completed, the tobacco material segment and the cigarette paper will not separate, causing the whole to remain in the heating chamber of the heated smoking device, and the cigarette can be pulled out as a whole, greatly improving the consumer's smoking experience.

Preferably, in the present technical solution, after multiple actual production tests, it is found that the coating area of the bonding portion 2 on the inner side of the coating material portion 3 is in the range of 10%-60% of the area of the tobacco material portion 1 projected onto the inner side of the coating material portion, so as to provide better adhesion between the tobacco material portion 1 and the coating material portion 3.

Furthermore, in the present technical solution, in order to provide consumers with more smoking experiences, the smoking substance in the tobacco substance portion 1 is made of one of reconstituted tobacco leaves and filamentous tobacco leaves or a mixture thereof, so as to obtain different experiences.

Furthermore, since the reconstituted tobacco also has a variety of processing methods, the reconstituted tobacco in this technical solution specifically includes: filamentous roller-pressed reconstituted tobacco and filamentous thick pulp-pulped reconstituted tobacco, which are made from one of them and a combination thereof. The reconstituted tobacco obtained by adopting different manufacturing methods can bring consumers more combinations of smoking experiences for personalized choices.

Furthermore, when the aerosol generated by heating the reconstituted tobacco leaves contained in the tobacco material portion 1 is not comparable to the complete filamentous tobacco leaves for consumers, an atomizer is added to the reconstituted tobacco leaves. The specific components of the atomizer are: one of propylene glycol and propylene glycol and a combination thereof, which provides flavor during combustion to simulate the filamentous tobacco leaves.

Preferably, as an important part of the bonding force between the tobacco material portion 1 and the coating material portion 3, the coating style of the bonding portion 2 on the inner side of the coating material portion 3 also determines the size of the bonding force. In this technical solution, the coating style of the bonding portion 2 is one of: point, line, and surface.

Furthermore, the coating direction of the adhesive portion 2 on the outer surface of the coating material portion 3 is along the circumference of the outer surface of the tobacco material portion 1, forming a plurality of connecting rings of the adhesive portion 2 connected end to end, and a plurality of the connecting rings are arranged along the axial direction of the tobacco material portion 3, and are arranged on the inner side surface of the coating material portion 3.

Furthermore, in order to provide a more stable bonding force, the bonding portions 2 are evenly distributed on the inner side surface of the covering material portion 3 .

Preferably, the bonding part 2 is made of one of water-based adhesive or hot-melt adhesive for cigarettes and a combination thereof. Specifically, the bonding part 2 is selected to be water-based adhesive for cigarettes as the adhesive material for cigarettes, because for adhesive materials for cigarettes, whether water-based adhesive for cigarettes or hot-melt adhesive for cigarettes is used, its bonding performance is sufficient to meet the performance requirements. However, the negative impact of water-based adhesive on sensory organs is less than that of hot-melt adhesive. Therefore, water-based adhesive is more suitable in this technical solution.

Preferably, the present technical solution is also directed to a method for testing the adhesion between the tobacco portion and the heating element, and the adhesion between the tobacco material portion 1 and the wrapping material portion 3 after smoking a heated cigarette. The specific steps are as follows:

S1. Cover the end surface of the tobacco material portion 3 with a heat-resistant film connected to a measuring instrument, and tightly fix it on the outer surface of the tobacco segment;

S2. Inserting the heated smoking device into the tobacco segment and performing simulated combustion and inhalation. After the tobacco segment is inhaled, the tobacco segment is fixed and the heated smoking device is removed to measure the maximum extraction force N1 of the heated smoking device. The maximum extraction force N1 can represent the adhesion strength between the tobacco segment and the heated smoking device.

S3. Tear off the film on the end surface of the tobacco segment, fix the tobacco segment, pull out the tobacco material portion 1, and measure the maximum pull-out force N2 of the tobacco material portion 1 at this time. The maximum pull-out force N2 can represent the adhesion force between the tobacco material portion 1 and the coating material portion 3.

1 to 6 , the center-heated cigarette provided by the present invention, which is easy to pull out of the heating device, is described in detail in three specific embodiments:

First embodiment:

In this embodiment, the center-heated cigarette of the easy-to-pull-out heating smoking device, wherein the coating area of the adhesive portion 2 on the inner side surface of the covering material portion 3 is 20% of the area of the tobacco material portion 1 projected onto the inner side surface of the covering material portion 3, is used to provide adhesion between the tobacco material portion 1 and the covering material portion 3 through the adhesive portion 2.

Furthermore, in this embodiment, as shown in Figures 1 and 2, the coating style of the adhesive portion 2 on the inner side of the covering material portion 3 is in a planar form, and is circumferentially arranged on the inner side of the covering material portion 3. Through the planar coating form, it can better provide uniform adhesion between the tobacco material portion 1 and the covering material portion 3.

Furthermore, in this embodiment, the tobacco material portion 1 is made of filamentous tobacco, which restores the smoking experience of traditional cigarettes as much as possible, and an atomizer is added to the tobacco material portion 1; specifically, the atomizer is glycerol, and the mass content of the atomizer in the filamentous tobacco is 12%.

At the same time, the testing method provided by the present invention is also used to test the adhesion force between the tobacco material part 1 and the heating element, and the adhesion force between the tobacco material part 1 and the covering material part 3 after the heated cigarette is smoked. In this embodiment, the adhesion force N1 between the tobacco material part 1 and the heating element after the cigarette is smoked is measured to be 0.28 kgf (kilogram-force), and the adhesion force N2 between the tobacco material part 1 and the covering material part 3 is 1.48 kgf (kilogram-force). It can be seen that N1 is significantly smaller than N2, which completely solves the problem of avoiding adhesion to the heating element when pulling out after smoking.

Second embodiment:

In this embodiment, the center-heated cigarette of the easy-to-pull-out heating smoking device, wherein the coating area of the adhesive portion 2 on the inner side surface of the covering material portion 3 is 35% of the area of the tobacco material portion 1 projected onto the inner side surface of the covering material portion 3, is used to provide adhesion between the tobacco material portion 1 and the covering material portion 3 through the adhesive portion 2.

Furthermore, in this embodiment, as shown in Figures 3 and 4, the coating style of the bonding portion 2 on the inner side of the coating material portion 3 is linear, and is circumferentially arranged on the inner side of the coating material portion 3. Through the linear coating form, it can better provide uniform adhesion between the tobacco material portion 1 and the coating material portion 3, and through multiple layers of parallel linear bonding portions 2, the tobacco material portion 1 is evenly bonded.

Furthermore, in this embodiment, the tobacco material portion 1 is a mixture of filamentous rolled tobacco leaves and filamentous thick pulp tobacco leaves, providing a mixed smoking experience, and the mixing mass ratio is 1:1, and atomizers are added to both; the atomizer is glycerol, and the mass content of the atomizer in the filamentous tobacco is 15%.

At the same time, in this embodiment, the adhesion force N1 between the tobacco material part 1 and the heating element after the cigarette is smoked is measured to be 0.39 kgf (kilogram-force), and the adhesion force N2 between the tobacco material part 1 and the coating material part 3 is 1.68 kgf (kilogram-force). It can be seen that N1 is significantly smaller than N2, which completely solves the problem of avoiding adhesion to the heating element when pulling out after smoking.

Third embodiment:

In this embodiment, the center-heated cigarette of the easy-to-pull-out heating smoking device, wherein the coating area of the adhesive portion 2 on the inner side surface of the covering material portion 3 is 50% of the area of the tobacco material portion 1 projected onto the inner side surface of the covering material portion 3, is used to provide adhesion between the tobacco material portion 1 and the covering material portion 3 through the adhesive portion 2.

Furthermore, in this embodiment, as shown in Figures 3 and 4, the coating pattern of the bonding portion 2 on the inner side of the coating material portion 3 is in a dotted form, and is evenly dispersed on the inner side 3 of the coating material portion. Through the evenly dispersed distribution, it can better provide uniform adhesion between the tobacco material portion 1 and the coating material portion 3, and the tobacco material portion 1 can be evenly bonded through multiple layers of parallel linear bonding portions 2.

Furthermore, in this embodiment, the tobacco material portion 1 is composed of three types: filamentous roller-pressed reconstituted tobacco leaves, filamentous thick slurry reconstituted tobacco leaves and filamentous tobacco leaves, which provide a complex smoking experience of mixed tobacco leaves while retaining the original tobacco leaves, and the mixing mass ratio is 1:1:1, and the filamentous roller-pressed reconstituted tobacco leaves and the filamentous thick slurry reconstituted tobacco leaves are added with an atomizer; the atomizer is propylene glycol and propylene glycol in a mass ratio of 3:2, and the mass content of the atomizer in the filamentous tobacco leaves is 17%.

At the same time, in this embodiment, the adhesion force N1 between the tobacco material part 1 and the heating element after the cigarette is smoked is measured to be 0.51 kgf (kilogram-force), and the adhesion force N2 between the tobacco material part 1 and the coating material part 3 is 2.16 kgf (kilogram-force). It can be seen that N1 is significantly smaller than N2, which completely solves the problem of avoiding adhesion to the heating element when pulling out after smoking.

The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

A center-heated cigarette that is easy to pull out of a heating smoking device, characterized by comprising: a tobacco segment, a filter rod segment; The tobacco segment and the filter rod segment are connected by tipping paper and arranged collinearly along the axis direction; The tobacco segment is formed by wrapping the cigarette paper material with the covering material portion and sheathing it on the outer surface of the tobacco material portion; The inner side surface of the covering material portion is further provided with an adhesive portion for bonding with the outer surface of the tobacco material portion. The center-heated cigarette with an easy-to-pull-out heating device according to claim 1 is characterized in that the coating area of the adhesive portion on the inner side of the covering material portion is 10%-60% of the area of the tobacco material portion projected onto the inner side of the covering material portion. The center-heated cigarette with an easy-to-pull-out heating device according to claim 2 is characterized in that the tobacco material portion is made of one of reconstituted tobacco leaves and filamentous tobacco leaves, or a mixture thereof. The center-heated cigarette with an easy-to-pull-out heating device according to claim 3 is characterized in that the reconstituted tobacco specifically includes: filamentous roller-pressed reconstituted tobacco and filamentous thick pulp reconstituted tobacco, which are made from one of them and a combination thereof. The center-heated cigarette with an easy-to-pull-out heating device according to claim 3 is characterized in that an atomizer is also added to the reconstituted tobacco leaves, and the atomizer is made of one of glycerol and propylene glycol and a combination thereof. The center-heated cigarette with an easy-to-pull-out heating device according to claim 2 is characterized in that the coating pattern of the adhesive portion on the inner side surface of the covering material portion is one of: points, lines, and surfaces. The center-heated cigarette with an easy-to-pull-out heating device according to claim 6 is characterized in that the adhesive portion is arranged on the inner side of the covering material portion along the circumference of the outer surface of the tobacco material portion. The center-heated cigarette with an easy-to-pull-out heating device according to claim 7 is characterized in that the bonding portions are evenly distributed between the inner side surfaces of the covering material portion. The center-heated cigarette of the easy-to-pull-out heating smoking device according to any one of claims 1 to 8 is characterized in that the bonding portion is made of one of water-based adhesive or hot melt adhesive for cigarettes, or a combination thereof. A method for testing a center-heated cigarette with an easily removable heating device, characterized by the following specific steps: S1. Cover the end surface of the tobacco material portion with a heat-resistant film and tightly fix it on the outer surface of the tobacco segment; S2. After the tobacco segment is smoked, the tobacco segment is fixed, and the heating device is pulled out to measure the maximum extraction force N1 of the heating device. The maximum extraction force N1 can represent the adhesion strength between the tobacco segment and the heating device. S3. Tear off the film on the end surface of the tobacco segment, fix the tobacco segment, pull out the tobacco material portion, and measure the maximum pull-out force N2 of the tobacco material portion at this time. The maximum pull-out force N2 can represent the adhesion strength between the tobacco material portion and the coating material portion.