HEAT-CONTAINING TOBACCO PRODUCTS WITH PERFORATED SIDE WALLS

Abstract

The invention relates to a heated tobacco product with perforated side walls (9), comprising a tobacco section (1) and a functional mouthpiece (3). The mouthpiece (2) is positioned between the tobacco section (1) and the functional mouthpiece (3). The tobacco section (1), the mouthpiece (2), and the functional mouthpiece (3) are wound and connected by outer wrapping and wrapping materials. The mouthpiece (2) is a cylindrical section comprising a hollow structure (2-1), and at least one side wall opening (2-2) is connected to the hollow structure (2-1) made on the side wall of the cylindrical section. When used, the tobacco product (9) is placed in a sealed heated smoking device, and during smoking, the vapor produced by the tobacco section (1) is mixed, after active movement, with air entering from the side wall opening (2-2) to form the main vapor stream.The tobacco product (9) can easily adjust the smoking efficiency, dilution rate, and vapor temperature, thereby improving the sensory quality of the heated tobacco product (9), and can effectively prevent cold air from passing through the tobacco section (1) during smoking, thus improving the heating efficiency, and effectively reducing the oxygen content of the tobacco section (1) to achieve the purpose of non-combustion heating. In addition, the tobacco product (9) has a simple structure and is easy to industrially produce.

Description

A heated tobacco product with perforated side walls Technical Field

[0001] The present invention relates to the field of cigarette product manufacturing, in particular to a heated tobacco product with perforated side walls, belonging to the category of heat-not-burn cigarettes. Background Art

[0002] Traditional tobacco has a history of hundreds of years and has been integrated into the lives of most smokers. In recent years, with the improvement of people's living standards, issues such as smoking and health, and the harm of secondhand smoke have become increasingly important to people, and the harm caused by traditional tobacco products has become increasingly prominent. At the same time, with the implementation of the WHO Framework Convention on Tobacco Control, especially the gradual expansion of the scope of smoking bans in public places in various countries around the world, the development environment of tobacco products has undergone major and profound changes. The structure of tobacco products is accelerating the adjustment towards diversification and smoke-free development [1]. (Cheng Xiaobing, Li Baojiang, Han Yandong. Development status of new tobacco products in the world [J]. China Tobacco, 2014 (3): 38.) New tobacco products have gradually become a realistic choice for major multinational tobacco companies to cope with the declining sales of traditional tobacco products [2]. (Liu Yali, Wang Jinbang, Zheng Xinzhang, et al. Development status and prospects of heat-not-burn tobacco products [J]. Journal of Chinese Tobacco Society, 2018, 24 (4))

[0003] At present, the vast majority of electrically heated cigarettes use air as a carrier for smoke. In order to ensure that the tobacco does not burn, the heating temperature applied is usually low, generally not exceeding 300°C. Compared with traditional cigarettes, the release of harmful components of electrically heated cigarettes is reduced, but the original flavor components of tobacco are difficult to be fully released, and the amount of smoke is insufficient. Therefore, this type of cigarette is less accepted by traditional smokers. If a closed cigarette structure or a closed heating device structure is adopted (Chinese patents 201911021676.8 and 201911021823.1 previously applied for by the applicant in this case), the tobacco section of the cigarette is isolated from the air, and fresh smoke is formed to continuously update the atmosphere of the closed tobacco part, so that the oxygen content gradually decreases with the heating process. At this time, even if the heating temperature is increased, combustion will not occur. The closed cigarette structure will not cause tobacco residues to fall and contaminate the smoking device, which can greatly increase the heating temperature of heated cigarettes, improve tobacco utilization and smoke release. Since there is no airflow through the tobacco, smoke migration in closed cigarettes will become particularly important.

[0004] There are two ways to extract smoke from sealed cigarettes: one is to use airflow as a carrier, as in the smoke generation process of traditional cigarettes; the other is to exploit active smoke migration. Active smoke migration is driven by two main forces: concentration differences and pressure differences. This invention utilizes a specific structural design to generate the driving force for active smoke migration, thereby utilizing active smoke migration and convection to form mainstream smoke. This invention proposes a heated tobacco product with perforated sidewalls.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to design a heated tobacco product with perforated side walls based on the above-mentioned existing technical conditions. The tobacco product is formed by a multi-segment rolling method, and the cigarette includes a tobacco segment, a smoke extraction segment, a functional mouthpiece segment and other parts. A side wall through hole is set at a specific position of the cigarette to form a smoke extraction segment. When in use, the cigarette is inserted into a closed heated tobacco device. During inhalation, the smoke generated by the tobacco segment is actively migrated by the driving force generated by the Bernoulli principle and the gas diffusion principle, and then mixed with the air entering through the side wall through hole to form mainstream smoke. The tobacco product can conveniently adjust the smoke extraction efficiency, dilution rate and smoke temperature, thereby improving the sensory quality of the heated tobacco product.

[0007] The design mechanism of the present invention is as follows: the tobacco product is provided with side wall through holes at specific positions on the cigarette to form a smoke extraction section, forming a concentration difference and a pressure difference between the tobacco section and the smoke extraction section, and utilizing the principle of gas migration to extract the fresh smoke generated by the sealed cigarette tobacco section into the mainstream smoke.

[0008] The object of the present invention is achieved through the following technical solutions:

[0009] A heated tobacco product with perforated side walls comprises a tobacco segment and a functional mouthpiece segment, wherein a smoke extraction segment is provided between the tobacco segment and the functional mouthpiece segment, the tobacco segment, the smoke extraction segment and the functional mouthpiece segment are connected together by wrapping an external rolling material, the smoke extraction segment is a column containing a cavity structure, and at least one side wall through hole communicating with the cavity structure is provided on the side wall of the column, and a coaxial through hole is provided on the external rolling material at a position corresponding to the side wall through hole.

[0010] The hollow structure can be divided into the following three forms:

[0011] One is that the cross section of the hollow structure is a regular or irregular shape such as a circle, a regular hexagon, a hexagon, a pentagon, or a heart shape (see FIG2 ).

[0012] The second type is a hollow structure with a ring-shaped through-hole cavity composed of segments of different diameters (as shown in FIG3 ). The ring-shaped through-hole cavity has 2-5 segments, preferably 2-3 segments. The inner diameter of the hollow cavity can be adjusted arbitrarily and can be 2 to 10 mm.

[0013] The third type is a hollow structure consisting of several evenly distributed axially penetrating channels (as shown in Figure 4). The number and diameter of the channels can be adjusted arbitrarily. In this structure, the sidewall through-holes extend directly to the center of the flue gas extraction section along the radial direction or at a certain angle, so that multiple channels are connected to the sidewall through-holes.

[0014] The length of the flue gas extraction section can be adjusted according to actual conditions and can be 5 to 30 mm.

[0015] The angle α between the sidewall through-holes and the axis of the hollow cavity is between 90° and 150°, preferably 90°. The through-hole diameter can be adjusted as needed, with an optimal diameter of 0.01 to 3 mm. The number of through-holes can be adjusted as needed, with an optimal range of 1 to 30, evenly distributed along the circumference. The through-hole diameter and number can be adjusted and matched based on actual conditions. The position of the through-holes from the tobacco segment can be adjusted arbitrarily, with an optimal distance of 0.5 to 15 mm.

[0016] The aperture of the coaxial through hole on the external winding material is not less than the aperture of the side wall through hole.

[0017] The tobacco segment is composed of tobacco raw materials or other smoky substrates in various forms wrapped in cigarette paper; the tobacco raw materials are tobacco substances composed of a certain formula, which can be in the form of sheets, filaments, particles, formed rods, porous rods, or gels; the cigarette paper is an airtight material or a material with controllable air permeability.

[0018] The flue gas extraction section is made of hard materials with a certain hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber and paper-based materials.

[0019] The heated tobacco product is used in conjunction with a sealed tobacco heating device, which consists of a heating chamber and a sealing structure (see Figure 6). The heating chamber is a cylindrical cavity structure, and its heating method can be circumferential heating or inner core heating. The heating device partially or completely covers the entire tobacco section. The sealing structure can be a soft sealing ring, an artificial lip, or other sealed circumferential sealing structure. A cap can be provided to enhance the sealing effect. The cap is a hollow cylindrical structure, and its inner diameter is slightly larger than the outer diameter of the cigarette to ensure that air can enter the side wall through-hole. Its inner cavity is cylindrical or gradually expanding trumpet-shaped. If the angle between the trumpet shape and the central axis is greater than or equal to 0° and less than or equal to 5°, the heating chamber, the sealing ring and the cap are coaxial, and the cap is connected to the heating chamber by thread, snap or magnetic attraction. After the cigarette is inserted into the smoking device, the side wall through-hole is located outside the sealing ring of the smoking device (that is, it must be connected to the outside air).

[0020] During use, the present invention inserts the cigarette (i.e., tobacco product) into a sealed heating device. The tobacco in the tobacco segment is heated to generate smoke, increasing the smoke concentration and air pressure within the segment. During inhalation, air enters the smoke extraction segment through the sidewall through-holes, forming a region of lower smoke concentration and lower air pressure within the hollow cavity. Due to the combined effects of the concentration and air pressure differences between the tobacco segment and the smoke extraction segment, the smoke from the tobacco segment actively migrates to the location of the sidewall through-holes, where it is carried by air flowing into the functional mouthpiece segment, forming mainstream smoke. By adjusting the number, diameter, drilling direction, and distance of the sidewall through-holes from the tobacco segment, the smoke extraction efficiency, smoke dilution efficiency, and mainstream smoke temperature can be adjusted.

[0021] The advantages of the present invention are as follows: 1. The indirect carrying of smoke by the extraction section of the cigarette can effectively prevent cold air from passing through the tobacco section during the smoking process, thereby improving the heating efficiency and effectively reducing the oxygen content of the tobacco section, thereby achieving the purpose of heating without burning; 2. By adjusting the number, aperture, punching direction and distance of the side wall through holes from the tobacco section, the smoke extraction efficiency, smoke dilution efficiency and mainstream smoke temperature can be conveniently adjusted, thereby improving the sensory quality of the cigarette; 3. The device has a simple structure and is easy to industrialize. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the axial cross-sectional structure of a heated tobacco product with perforated side walls.

[0023] In Figure 1: 1. tobacco section, 2. smoke extraction section, 2-1. cavity structure, 2-2. side wall through hole; 3. functional mouthpiece section, 4. cigarette paper, 4-1. coaxial through hole, 5. tipping paper.

[0024] Figure 2 is a schematic diagram of the structure of the first type of flue gas extraction section.

[0025] FIG3 is a schematic diagram of the structure of the second type of flue gas extraction section.

[0026] FIG4 is a schematic diagram of the structure and cross-sectional structure of the third form of the flue gas extraction section.

[0027] Figure 5 is a schematic diagram of the side wall through hole drilling direction structure.

[0028] Figure 6 is a schematic diagram of the cross-sectional structure of a cigarette and smoking device in use.

[0029] In Figure 6: 6, heating chamber, 7, cover cap, 8, sealing ring, 9, cigarette.

[0030] FIG7 is a data chart showing the mass flow rate data of each cross section and the calculated flue gas extraction efficiency and dilution rate data obtained by simulating with Fluent software under different sidewall through-hole diameters and cavity inner diameters.

[0031] Best Mode for Carrying Out the Invention

[0032] The present invention is described in further detail below with reference to the accompanying drawings:

[0033] As shown in Figure 1: A heated tobacco product with a perforated side wall, comprising a tobacco segment (1) and a functional mouthpiece segment (3), wherein: a smoke extraction segment (2) is provided between the tobacco segment (1) and the functional mouthpiece segment (3), the tobacco segment (1), the smoke extraction segment (2), and the functional mouthpiece segment (3) are wrapped and connected together by an external rolling material (i.e., cigarette paper 4, tipping paper 5), the smoke extraction segment is a column containing a cavity structure (2-1), and at least one side wall through hole (2-2) communicating with the cavity structure (2-1) is provided on the side wall of the column, and a coaxial through hole (4-1) is provided on the cigarette paper (4) at a position corresponding to the side wall through hole (2-2).

[0034] The structural forms of the hollow cavity can be divided into the following three types:

[0035] One is that the cross section of the cavity structure (2-1) is a regular or irregular shape such as a circle, a regular hexagon, a hexagon, a pentagon, or a heart shape (as shown in FIG2 ).

[0036] The second type is a cavity structure (2-1 is a ring-shaped through-hole cavity composed of segments of different diameters (as shown in Figure 3), which is composed of segments 2-3. The inner diameter of the hollow cavity can be adjusted arbitrarily and can be 2 to 10 mm.

[0037] The third type is a cavity structure (2-1) consisting of a number of evenly distributed axially penetrating channels (as shown in FIG4 ), and the number and aperture of the channels can be adjusted arbitrarily.

[0038] The angle α between the sidewall through-holes and the axis of the hollow cavity is between 90° and 150° (as shown in FIG5 ), preferably 90°. The through-hole diameter is adjustable, with an optimal diameter of 0.01 to 3 mm. The number of through-holes is adjustable, with an optimal range of 1 to 30, and the through-holes are evenly distributed along the circumference. The through-hole diameter and number are adjusted to match the actual situation. The position of the through-holes from the tobacco segment is adjustable, with an optimal distance of 0.5 to 15 mm.

[0039] The tobacco segment is composed of tobacco raw materials or other smoky substrates in various forms wrapped in cigarette paper; the tobacco raw materials are tobacco substances composed of a certain formula, which can be in the form of sheets, filaments, particles, formed rods, porous rods, or gels; the cigarette paper is an airtight material or a material with controllable air permeability.

[0040] The flue gas extraction section is made of hard materials with a certain hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber and paper-based materials.

[0041] This heated tobacco product is used in conjunction with a sealed tobacco heating device, which consists of a heating chamber 6 and a sealing ring 8 (see Figure 6). The heating chamber is a cylindrical cavity structure, and its heating method can be circumferential heating or inner core heating, and the heating chamber covers the entire tobacco section. The sealing structure can be a soft sealing ring, an artificial lip, or other sealed circumferential sealing structure. A cap 7 can be provided to enhance the sealing effect. The cap is a hollow cylindrical structure with an inner diameter slightly larger than the outer diameter of the cigarette to ensure that air can enter the side wall through-hole. Its inner cavity is a gradually expanding trumpet shape (in Figure 6, it is trumpet-shaped, but it can also be cylindrical), with an angle with the central axis greater than or equal to 0° and less than or equal to 5°. The heating chamber 6, sealing ring 8, and cap 7 are coaxial, and the cap is connected to the heating chamber by thread, snap, or magnetic attraction. After the cigarette is inserted into the smoking device, the side wall through-hole 2-2 is located outside the smoking device sealing ring 8, ensuring that outside air can flow into the hollow cavity 2-1 through this through-hole.

[0042] Figure 7 is a data chart showing the mass flow rate data for each cross-section, as well as the calculated flue gas extraction efficiency and dilution rate, obtained using Fluent software simulations for different sidewall hole diameters and cavity inner diameters. The table shows that adjusting the sidewall hole diameter and cavity inner diameter can easily adjust the flue gas extraction efficiency and dilution rate.

Claims

1. A heated tobacco product with a perforated side wall, comprising a tobacco segment (1) and a functional mouthpiece segment (3), characterized in that: A smoke extraction section (2) is provided between a tobacco section (1) and a functional mouthpiece section (3); the tobacco section (1), the smoke extraction section (2), and the functional mouthpiece section (3) are connected together by wrapping an external rolling material; the smoke extraction section is a column containing a cavity structure (2-1), and at least one side wall through hole (2-2) communicating with the cavity structure (2-1) is provided on the side wall of the column; a coaxial through hole (4-1) is provided on the external rolling material (4) at a position corresponding to the side wall through hole (2-2).

2. The heated tobacco product with perforated sidewalls according to claim 1, characterized in that: The cavity structure (2-1) is a through columnar shape, and the cross section of the cavity columnar structure is a circle, a regular hexagon, a hexagon, a pentagon, a heart shape, or other regular shapes or irregular shapes.

3. The heated tobacco product with perforated sidewalls according to claim 1, wherein: The cavity structure (2-1) is a ring-shaped through-hole cavity composed of sections with different diameters.

4. The heated tobacco product with perforated sidewalls according to claim 1, wherein: The cavity structure (2-1) is composed of a plurality of evenly distributed holes that penetrate along the axial direction, and the number and diameter of the holes can be adjusted according to needs.

5. The heated tobacco product with perforated sidewalls according to claim 1, wherein: The included angle α between the side wall through hole (2-2) and the central axis of the cavity structure (2-1) is between 90° and 150°.

6. The heated tobacco product with a perforated sidewall according to claim 1, characterized in that: The aperture of the coaxial through hole (4-1) is not smaller than the aperture of the side wall through hole (2-2).

7. The heated tobacco product with a perforated sidewall according to claim 1, characterized in that: The tobacco segment (1) is composed of tobacco raw materials or other smoke-generating substrates in various forms wrapped in cigarette paper; the tobacco raw materials are tobacco substances composed of a certain formula, which can be in the form of sheets, threads, particles, formed rods, porous rods, or gel; the cigarette paper is an airtight material or a material with controllable air permeability.

8. The heated tobacco product with a perforated sidewall according to claim 1, characterized in that: The smoke extraction section (2) is made of a hard material with a certain hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber and paper-based materials.

9. The heated tobacco product with a perforated sidewall according to claim 1, characterized in that: The heated tobacco product is a heat-not-burn tobacco product.

10. The heated tobacco product with a perforated sidewall according to claim 1 or 8, characterized in that: The heated tobacco product (9) is used in conjunction with a sealed tobacco heating device, wherein the sealed heating device comprises a heating chamber (6) and a sealing structure, wherein the heating chamber (6) is a cylindrical cavity structure, wherein the heating method can be circumferential heating or inner core heating, and the heating device partially or completely covers the entire tobacco segment.

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