Heated tobacco product with perforated sidewalls

Abstract

A sidewall-perforated heated tobacco product 9 comprises a tobacco section 1 and a functional mouthpiece rod section 3. A vapor extraction section 2 is provided between the tobacco section 1 and the functional mouthpiece rod section 3. The tobacco section 1, the vapor extraction section 2 and the functional mouthpiece rod section 3 are wrapped and connected to each other by an external wrapping and tipping material. The vapor extraction section 2 is a cylinder with a hollow structure 2-1, and at least one sidewall through-hole 2-2 communicating with the hollow structure 2-1 is formed on the sidewall of the cylinder.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing cigarette products, and more particularly to a heated tobacco product having a perforated sidewall, belonging to the category of non-combustion heated cigarettes.

Background Art

[0002] Traditional cigarettes have a history of hundreds of years and have been incorporated 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 caused by second-hand smoke have been increasingly emphasized by people, and the harm caused by traditional cigarette products has become more prominent. On the other hand, with the implementation of the WHO's "Framework Convention on Tobacco Control", especially the gradual expansion of smoking bans in public places around the world, the development environment of cigarette products has experienced a significant and profound change, and the structure of cigarette products is moving towards diversification and the development of smoke-free products (Non-Patent Document 1). New cigarette products have gradually become a realistic option for major multinational cigarette companies in order to cope with the decline in the sales of traditional cigarette products (Non-Patent Document 2).

[0003] Currently, most electric heated cigarettes use air as a carrier for smoke. To ensure that the tobacco does not burn, the applied heating temperature is usually low, generally not exceeding 300°C. Compared with traditional cigarettes, the emission of harmful components in electric heated cigarettes is reduced, but it is difficult to completely release the aromatic components of tobacco, and the amount of smoke is insufficient. As a result, such cigarettes are not easily accepted by traditional smokers. Adopting a sealed cigarette structure or a sealed heating device structure (Patent Document 1 and Patent Document 2 previously filed by the applicant of this application), the tobacco section of the cigarette is isolated from the air, fresh smoke is formed, and the atmosphere of the sealed tobacco section is continuously updated. As a result, the amount of oxygen gradually decreases during the heating process, and at this time, even if the heating temperature rises, no combustion phenomenon will occur. The sealed cigarette structure does not cause the situation where tobacco residues fall and contaminate the smoking set. Thereby, the heating temperature of the electric heated cigarette can be significantly improved, and the utilization rate of tobacco and the amount of smoke emission can be improved. The movement of smoke in the sealed cigarette is particularly important because the air flow does not pass through the tobacco.

[0004] There are two methods to extract smoke from a sealed cigarette. One is to utilize an air flow carrier, such as the traditional cigarette smoke generation process, and the other is to use the active movement of smoke. There are two main driving forces for the active movement of smoke. One is the concentration difference, and the other is the pressure difference. The present invention generates the driving force for the active movement of smoke through a specific structural design, thereby forming mainstream smoke by utilizing the active movement and convection of smoke. A heated tobacco product with a perforated side wall is proposed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Non-Patent Literature

[0006]

Non-Patent Literature 1

Non-Patent Literature 2

Summary of the Invention

[0007] An object of the present invention is to provide a heated tobacco product having a perforated side wall based on the above-described prior art situation. The tobacco product is formed in a multi-section roll connection form, and the cigarette includes a tobacco section, a smoke extraction section, a functional filter tip section, and the like. Side wall through holes are arranged at specific positions of the cigarette to form a smoke extraction section. When the cigarette is used, the cigarette is inserted into a closed-type heated smoking set. The smoke generated in the tobacco section is actively moved through the driving force generated by the Bernoulli principle and the principle of gas diffusion, and then mixed with the air entering from the side wall through holes 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.

[0008] The design mechanism of the present invention is as follows. In a tobacco product, a sidewall through-hole is provided at a specific position of a cigarette to form a smoke extraction section, a concentration difference and a pressure difference are formed between the tobacco section and the smoke extraction section, and fresh smoke generated in the sealed cigarette tobacco section is extracted into the mainstream smoke by utilizing the gas movement principle.

[0009] The object of the present invention is achieved by the following technical solutions.

[0010] A heated tobacco product having a perforated sidewall, comprising a tobacco section and a functional chip section, with a smoke extraction section disposed between the tobacco section and the functional chip section, the tobacco section, the smoke extraction section, and the functional chip section being wrapped by an external roll material and connected to each other, the smoke extraction section being a cylindrical body having a hollow structure, at least one sidewall through-hole communicating with the hollow structure opening on the sidewall of the cylindrical body, and a coaxial through-hole being provided on the external roll material at a position corresponding to the sidewall through-hole.

[0011] The form of the hollow structure can be divided into the following three types.

[0012] One is that the cross-section of the hollow structure (hollow structure) has a regular or irregular shape such as a circle, a regular hexagon, a hexagon, a pentagon, a heart shape, etc. (as shown in Figure 2).

[0013] The second type is an annular platform type through-hole in which the hollow structure is composed of sections having different diameters (as shown in Figure 3), the annular platform type through-hole can have 2 to 5 sections, preferably 2 to 3 sections, and the inner diameter of the circumference of the hole can be adjusted arbitrarily and can be 2 mm to 10 mm.

[0014] The third type is composed of a plurality of evenly distributed channels that penetrate axially through the cavity structure (as shown in Figure 4), and the number and diameter of the channels can be adjusted arbitrarily. In this structure, the sidewall through-holes lead directly to the center of the smoke extraction section along the radial direction or at a specific angle, and as a result, a plurality of channels are connected to the sidewall through-holes.

[0015] The length of the smoke extraction section can be adjusted according to the actual situation and can be set to 5 mm to 30 mm.

[0016] The included angle α between the sidewall through-hole and the axis of the hollow cavity is 90° to 150° (as shown in Figure 5), preferably 90°. The diameter of the through-hole can be adjusted according to the actual requirements, and the optimal diameter is 0.01 mm to 3 mm. The number of through-holes can be adjusted as needed, and the optimal number is 1 to 30. The through-holes are evenly distributed along the circumference. The diameter and number of the through-holes are adjusted and adapted according to the actual conditions. The distance from the through-hole to the tobacco section can be adjusted arbitrarily, and the optimal distance is 0.5 mm to 15 mm.

[0017] The diameter of the coaxial through-hole of the external roll material is not less than the diameter of the through-hole in the sidewall.

[0018] The tobacco section is formed by various forms of tobacco raw materials or other smoking substrates wrapped in rolling paper. The tobacco raw material is a tobacco substance composed of a specific formulation and can be in the form of a sheet, filament, granule, formed rod, porous rod, or gel. The rolling paper is an airtight material or a material with controllable air permeability.

[0019] The smoke extraction section is made of a rigid material with a certain hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber, paper-based materials, etc.

[0020] The heated tobacco product is used in combination with a hermetic tobacco heating device. The hermetic tobacco heating device is composed of a heating cavity and a sealing ring (see Figure 6). The heating cavity has a cylindrical cavity structure, and its heating form can be either circumferential heating or internal core heating. The heating cavity can partially or completely cover the entire tobacco section. The sealing structure can be a soft sealing ring, an artificial lip, or other sealing structures that seal the circumferential part. A cap 7 can be provided to enhance the sealing effect. The cap has a hollow cylindrical structure. The inner diameter of the cap is slightly larger than the outer diameter of the cigarette to ensure that air can enter the side wall through-hole. The inner cavity of the cap has a trumpet structure that gradually expands. When the cap has a trumpet structure, the included angle with the central axis is 0° or more and 5° or less. The heating cavity, the sealing ring, and the cap are coaxial, and the cap is connected to the heating cavity by threads, snaps, or magnetic adsorption. After the cigarette is inserted into the smoking set, the side wall through-hole 2-2 is positioned outside the sealing ring of the smoking set (i.e., it must communicate with the outside air).

[0021] During use, the cigarette (i.e., the tobacco product) according to the present invention is inserted into the hermetic heating device. The tobacco in the tobacco section is heated to generate smoke. As a result, the smoke concentration in the tobacco section increases, and the air pressure increases. During suction, air enters the smoke extraction section through the through-holes in the side wall, and a low smoke concentration and low air pressure area are formed in the hollow cavity. Under the combined action of the concentration difference and air pressure difference between the tobacco section and the smoke extraction section, the smoke in the tobacco section actively moves to the position of the side wall through-hole and is carried into the functional chip section by the air flowing from the side wall through-hole to form the mainstream smoke. By adjusting the number, diameter, perforation direction, and distance from the tobacco section of the side wall through-holes, the smoke extraction efficiency, smoke dilution efficiency, and temperature of the mainstream smoke can be adjusted.

[0022] The present invention has the following advantages: 1. By using the smoke extraction section, the form of indirectly conveying the smoke can effectively prevent cold air from passing through the tobacco section during suction, improve the heating efficiency, and at the same time, effectively reduce the oxygen content in the tobacco section, achieving the purpose of non-combustion heating. 2. The smoke extraction efficiency, smoke dilution efficiency, and mainstream smoke temperature can be conveniently adjusted by adjusting the number, diameter, perforation direction of the side wall through-holes, and the distance from the side wall through-holes to the tobacco section, and as a result, the sensory quality of the cigarette is improved. 3. The device has a simple structure and is easy to industrialize.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Best Mode for Carrying Out the Invention

[0024] The present invention will be described in more detail below with reference to the accompanying drawings.

[0025] As shown in FIG. 1, a heated tobacco product having a perforated side wall includes a tobacco section 1 and a functional chip section 3, and a smoke extraction section 2 is disposed between the tobacco section 1 and the functional chip section 3. The tobacco section 1, the smoke extraction section 2, and the functional chip section 3 are wrapped by an external roll material (i.e., a wrapper 4 and a chip paper 5) and connected to each other. The smoke extraction section is a cylindrical body having a cavity structure 2-1, and at least one side wall through hole 2-2 communicating with the cavity structure 2-1 opens on the side wall of the cylindrical body. A coaxial through hole 4-1 is provided on the wrapper 4 at a position corresponding to the side wall through hole 2-2.

[0026] The hollow cavity structure can be composed of the following three types.

[0027] One is that the cross section of the cavity structure 2-1 has a regular or irregular shape such as a circle, a regular hexagon, a hexagon, a pentagon, a heart shape, etc. (as shown in FIG. 2).

[0028] The second type is that the cavity structure 2-1, i.e., an annular platform type through hole (shown in FIG. 3), is composed of sections having different diameters, preferably composed of 2 to 3 sections, and the inner diameter of the circumference of the cavity can be arbitrarily adjusted and can be 2 mm to 10 mm.

[0029] The third type is that the cavity structure 2-1 is composed of a plurality of equally distributed channels penetrating in the axial direction (as shown in FIG. 4), and the number and diameter of the channels can be arbitrarily adjusted.

[0030] The included angle α between the axis of the side wall through-hole and the hollow cavity is 90° to 150° (as shown in FIG. 5), preferably 90°. The opening diameter of the through-hole can be arbitrarily adjusted, and the optimal diameter is 0.01 mm to 3 mm. The number of through-holes can be arbitrarily adjusted, and the optimal number is 1 to 30. The through-holes are uniformly distributed along the circumference. The diameter and the number of the through-holes are adjusted and adapted according to the actual conditions. The distance from the through-hole to the tobacco section can be arbitrarily adjusted, and the optimal distance is 0.5 mm to 15 mm.

[0031] The tobacco section is composed of various forms of tobacco raw materials wrapped in rolling paper or other smoking substrates. The tobacco raw material is a tobacco substance composed of a specific formulation, which can be in the form of a sheet, filament, granule, formed rod, porous rod, or gel. The rolling paper is an airtight material or a material with controllable air permeability.

[0032] The smoke extraction section is made of a hard material with a specific hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber, paper-based materials, etc.

[0033] The heated tobacco product is used in combination with a hermetic tobacco heating device. The hermetic tobacco heating device is composed of a heating cavity 6 and a sealing ring 8 (see Fig. 6). The heating cavity has a cylindrical cavity structure, and its heating mode can be either circumferential heating or internal core heating. The heating cavity covers the entire tobacco section. The sealing structure can be a soft sealing ring, an artificial lip, or other sealing structures that seal the circumferential part. A cap 7 can be provided to enhance the sealing effect. The cap has a hollow cylindrical structure. The inner diameter of the cap is slightly larger than the outer diameter of the cigarette to ensure that air can enter the side wall through-hole. The inner cavity of the cap has a trumpet structure that gradually expands (in Fig. 6, the inner cavity of the cap has a trumpet structure or a cylindrical structure), and the included angle with its central axis is 0° or more and 5° or less. The heating cavity 6, the sealing ring 8, and the cap 7 are coaxial, and the cap is connected to the heating cavity by a screw, snap, or magnetic adsorption. After the cigarette is inserted into the smoking set, the side wall through-hole 2-2 is positioned outside the sealing ring 8 of the smoking set to ensure that outside air can flow into the hollow cavity 2-1 through the through-hole.

[0034] Fig. 7 is a data chart showing the mass flow rate data for each section obtained by using Fluent software simulation under different side wall through-hole diameters and cavity inner diameters, as well as the calculated smoke extraction efficiency and dilution rate data. As can be seen from the table, by adjusting the opening diameter of the side wall through-hole and the inner diameter of the cavity, the smoke extraction efficiency and dilution rate can be conveniently adjusted.

Claims

A heated tobacco product for use in combination with a closed-type tobacco heating device, comprising: a tobacco section (1) and a functional chip section (3); a smoke extraction section (2) is disposed between the tobacco section (1) and the functional chip section (3); the tobacco section (1), the smoke extraction section (2), and the functional chip section (3) are wrapped by an external roll material and connected to each other; the smoke extraction section is a cylindrical body having a cavity structure (2-1), and at least one side wall through hole (2-2) communicating with the cavity structure (2-1) opens on the side wall of the cylindrical body, and a coaxial through hole (4-1) is provided on the external roll material (4) at a position corresponding to the side wall through hole (2-2); the closed-type tobacco heating device is composed of a heating cavity (6) and a sealing structure, the heating cavity (6) has a cylindrical cavity structure, and its heating form can be either circumferential heating or internal core heating, and the heating device is characterized in that it partially or completely covers the entire tobacco section, a heated tobacco product having a perforated side wall.

2. The cavity structure (2-1) has a through-column structure, and the cross section of the through-column structure has a regular shape such as a circle, a regular hexagon, a hexagon, a pentagon, a heart shape, or an irregular shape, a heated tobacco product having a perforated side wall according to Claim 1.

3. The cavity structure (2-1) has an annular platform type through cavity formed by sections having different diameters, a heated tobacco product having a perforated side wall according to Claim 1.

4. The cavity structure (2-1) is composed of a plurality of channels penetrating axially and uniformly distributed, and the number and diameter of the channels can be adjusted as required, a heated tobacco product having a perforated side wall according to Claim 1.

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

6. The diameter of the coaxial through hole (4-1) is not less than the diameter of the side wall through hole (2-2), a heated tobacco product having a perforated side wall according to Claim 1.

7. The tobacco section (1) is formed of tobacco raw materials or other smoking substrates in various forms wrapped in rolling paper. The tobacco raw material is a tobacco substance composed of a specific formulation that can be in the form of a sheet, filament, granule, formed rod, porous rod, or gel. The rolling paper is made of an airtight material or a material having controllable air permeability. The heated tobacco product having a porous side wall according to claim 1, characterized in that.

8. The smoke extraction section (2) is made of a hard material having a specific hardness, including metal, PEEK, polytetrafluoroethylene, organic glass, acetate fiber, paper-based material, etc. The heated tobacco product having a porous side wall according to claim 1, characterized in that.

9. The heated tobacco product is a non-combustion heated tobacco product. The heated tobacco product having a porous side wall according to claim 1, characterized in that.

Images