A combustible heating cigarette with controllable combustion rate

Abstract

This invention provides a combustion-type heated cigarette with adjustable combustion rate. The heated cigarette includes a combustion section, a core section, and a filter section coaxially connected in sequence. The combustion section, core section, and filter section are formed by wrapping the combustion section with cigarette paper. The cigarette paper wrapping the combustion section is a cigarette paper with adjustable combustion rate, and the cigarette paper with adjustable combustion rate is a cigarette paper coated with inorganic powder. Under the condition of the same combustion section length, the heated cigarette of this invention, by wrapping the combustion section with specific cigarette paper, significantly extends the combustion time compared to conventional combustion-type heated cigarettes using ordinary cigarette paper, ensuring sufficient and sustained total heat output. The degree of pyrolysis of the tobacco material in the core section is significantly improved, and the smoke release is more complete and stable.

Description

Technical Field

[0001] This invention belongs to the field of heated cigarette technology, specifically relating to a combustion-type heated cigarette with adjustable combustion rate. Background Technology

[0002] Currently, most heated cigarettes adopt a separate design of "cigarette device + cartridge". Their working principle is that a dedicated heating element (or heating needle) inside the electronic cigarette device precisely heats the tobacco material in the cartridge, causing it to thermally decompose at around 300℃ and release aerosol. This type of product avoids the combustion process of traditional cigarettes, reducing the generation of harmful components.

[0003] However, this split design has inherent drawbacks: consumers must carry and rely on a dedicated e-cigarette device. These devices require charging and maintenance, are prone to malfunction, and have a high initial purchase cost. These factors inconvenience users, limit usage scenarios, and affect the acceptance of the device by some consumers.

[0004] To overcome reliance on specialized smoking devices, we explored the technology of "device-free" combustion-type heated cigarettes. Ideally, this product should function like a traditional cigarette, providing self-sustaining heat upon ignition, while also allowing the tobacco material to undergo pyrolysis without direct combustion, similar to heated cigarettes. However, achieving this goal presents significant technical challenges: precisely controlling the heat release rate and transfer efficiency of the combustion stage. If the combustion rate is too fast, the combustion stage will burn out quickly, resulting in insufficient heat release time and inadequate total heat output. The heat source will be interrupted before the tobacco core material is sufficiently and evenly heated to the temperature required for pyrolysis, leading to incomplete pyrolysis, low smoke production, and poor sensory quality. Conversely, if the combustion process is too slow or unstable, it will also cause fluctuations in heat output, affecting the user experience.

[0005] In summary, how to accurately and reliably control the combustion rate of the combustion section so that it can continuously and stably provide sufficient heat for the thermal decomposition of the core section has become the core technological bottleneck that must be overcome to realize the commercialization of "smokeless" combustion-type heated cigarettes. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a combustion-type heated cigarette with adjustable combustion rate. The heated cigarette can regulate and stabilize the combustion rate of the combustion section, ensuring that its combustion time is long enough to continuously provide the total heat and necessary heating time required for the full pyrolysis of the core section.

[0007] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, the present invention provides a combustion-type heated cigarette with adjustable combustion rate, the heated cigarette comprising a combustion section, a core section and a filter section connected coaxially in sequence; The combustion section, the core section, and the filter section are formed by wrapping cigarette paper. The cigarette paper wrapped around the combustion section is cigarette paper with an adjustable combustion rate. The adjustable burning rate cigarette paper is cigarette paper with an inorganic powder coating on its surface.

[0008] The combustion section of the heated cigarette provided by this invention is formed by wrapping cigarette paper that has undergone combustion regulation treatment. By coating the surface of the cigarette paper with inorganic powder, the linear combustion rate of the cigarette paper can be actively reduced and stabilized, thereby enabling the combustion section to burn continuously for a sufficient time at a controlled and relatively slow speed, outputting a stable heat flow with sufficient total heat and a long duration. This heat flow can ensure that the core material is fully heated to the temperature range required for efficient thermal decomposition and maintained for the necessary time.

[0009] Preferably, the inorganic powder includes any one or a combination of at least two of silicate mineral powder, magnesium hydroxide, or attapulgite powder.

[0010] Preferably, the inorganic powder is a combination of silicate mineral powder and attapulgite powder.

[0011] Preferably, the mass ratio of the silicate mineral powder to the attapulgite powder is 1:(2-4), for example, it can be 1:2.1, 1:2.3, 1:2.5, 1:2.8, 1:3, 1:3.2, 1:3.5, 1:3.7 or 1:3.9, etc.

[0012] This invention provides a method for treating the combustion section of cigarette paper by using a combination of silicate mineral powder and attapulgite powder, thereby reducing its combustion rate to a preset, slower range. This method can ensure that the core section receives sufficient total heat and heating time for thermal decomposition while reducing the length of the combustion section.

[0013] Preferably, the coating amount of the inorganic powder on the cigarette paper surface is 0.005-0.04 g / cm³. 2 For example, it can be 0.006 g / cm³ 2 0.008 g / cm 2 0.01 g / cm 2 0.02 g / cm 2 0.03 g / cm 2 Or 0.04 g / cm 2 wait; Preferably, the inorganic powder is coated on the inner wall of the cigarette paper.

[0014] Preferably, the raw materials for preparing the combustion section are carbon powder and plant fiber.

[0015] Preferably, the mass ratio of the toner to the plant fiber is 1:(2-5), for example, it can be 1:2.2, 1:2.5, 1:2.8, 1:3, 1:3.2, 1:3.5, 1:3.8, 1:4, 1:4.2, 1:4.5 or 1:4.8, etc.

[0016] Preferably, the raw materials for preparing the tobacco core segment include tobacco raw materials, smoking agents, tobacco flavorings, and binders.

[0017] Preferably, the components of the tobacco core segment include, by weight, 30-50 parts of tobacco raw material (e.g., 32, 35, 38, 40, 42, 45, or 48 parts), 5-15 parts of smoke-generating agent (e.g., 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 parts), 0.1-0.5 parts of tobacco flavoring (e.g., 0.15, 0.2, 0.3, 0.4, or 0.45 parts), and 0.05-0.3 parts of binder (e.g., 0.06, 0.08, 0.1, 0.15, 0.2, 0.25, or 0.3 parts).

[0018] Preferably, the tobacco raw material includes any one or a combination of at least two of tobacco sheets, tobacco pellets, or shredded tobacco.

[0019] Preferably, the tobacco flavoring comprises any one or a combination of at least two of the following: sweet orange oil, lemon oil, vanillin, succinate, 2-acetylpyrazine, 2,3,5-trimethylpyrazine, isoamyl isovalerate, menthyl acetate, phenethyl alcohol, furanone, or geraniol.

[0020] Preferably, the adhesive comprises any one or a combination of at least two of sodium alginate, sodium carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, chitosan, guar gum, or cellulose acetate.

[0021] Preferably, the smoke-generating agent comprises any one or a combination of at least two of propylene glycol, glycerin, or sorbitol. Preferably, the smoke-generating agent is a combination of propylene glycol, sorbitol, and glycerin.

[0022] Preferably, the filter tip is made of cellulose acetate or polylactic acid.

[0023] Preferably, the length of the combustion section is 10-20 mm (e.g., 11 mm, 13 mm, 15 mm, 17 mm, or 19 mm), the length of the core section is 10-30 mm (e.g., 12 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, or 28 mm), and the length of the filter section is 20-40 mm (e.g., 22 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, or 38 mm). Specific values ​​within the above ranges can be selected, and will not be elaborated further here.

[0024] Compared with the prior art, the present invention has the following beneficial effects: (1) The heated cigarette of the present invention extends the combustion time by about 30% compared with conventional heated cigarettes that use ordinary cigarette paper by wrapping the combustion section with specific cigarette paper, ensuring sufficient total heat output and significantly improving the carbonization degree of the core material in the core section.

[0025] (2) When ensuring sufficient overall heat, the heated cigarette of the present invention can still achieve full carbonization of the core section under the optimized design of shortening the combustion section length by up to 40% compared with conventional combustion heated cigarettes using ordinary cigarette paper. Detailed Implementation

[0026] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0027] Example 1 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate, the heated cigarette comprising a combustion section, a core section and a filter section connected coaxially in sequence; The combustion section is 15 mm long, the core section is 15 mm long, and the filter section is 20 mm long. The diameter of the heated cigarette is 7.9 mm; The combustion section, the core section, and the filter section are formed by wrapping cigarette paper. The cigarette paper wrapped around the combustion section is cigarette paper with an adjustable combustion rate. The adjustable burning rate cigarette paper has an inorganic powder coating on its surface (coating amount of 0.04 g / cm³). 2 ) cigarette paper; The inorganic powder is a combination of silicate mineral powder and attapulgite powder in a mass ratio of 1:3. The combustion section is composed of plant fiber and carbon powder in a mass ratio of 4:1. The components of the tobacco core segment, by weight, are 45 parts tobacco raw material, 12 parts smoking agent, 0.4 parts tobacco flavoring and 0.25 parts adhesive; The tobacco raw material is tobacco sheet; The smoke-generating agent is a combination of propylene glycol, sorbitol, and glycerin in a mass ratio of 1:0.5:3; The tobacco flavoring is a combination of sweet orange oil and lemon oil in a mass ratio of 1:1; The adhesive is sodium carboxymethyl cellulose by mass ratio; The filter tip section is made of cellulose acetate.

[0028] Example 2 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate, the heated cigarette comprising a combustion section, a core section and a filter section connected coaxially in sequence; The combustion section is 17 mm long, the core section is 25 mm long, and the filter section is 30 mm long. The diameter of the heated cigarette is 7.9 mm; The combustion section, the core section, and the filter section are formed by wrapping cigarette paper. The cigarette paper wrapped around the combustion section is cigarette paper with an adjustable combustion rate. The adjustable burning rate cigarette paper has an inorganic powder coating on its surface (coating amount of 0.03 g / cm³). 2 ) cigarette paper; The inorganic powder is a combination of silicate mineral powder and attapulgite powder in a mass ratio of 1:4. The combustion section is composed of plant fiber and carbon powder in a mass ratio of 3:1. The components of the tobacco core segment, by weight, are 40 parts tobacco raw material, 10 parts smoking agent, 0.3 parts tobacco flavoring and 0.2 parts adhesive; The tobacco raw material is tobacco sheet; The smoke-generating agent is a combination of propylene glycol, sorbitol, and glycerin in a mass ratio of 2:0.5:2; The tobacco flavoring is a combination of sweet orange oil and lemon oil in a mass ratio of 1:2; The adhesive is hydroxypropyl methylcellulose by mass ratio; The filter tip section is made of polylactic acid.

[0029] Example 3 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate, the heated cigarette comprising a combustion section, a core section and a filter section connected coaxially in sequence; The combustion section is 13mm long, the core section is 20mm long, and the filter section is 40mm long. The diameter of the heated cigarette is 7.9 mm; The combustion section, the core section, and the filter section are formed by wrapping cigarette paper. The cigarette paper wrapped around the combustion section is cigarette paper with an adjustable combustion rate. The adjustable burning rate cigarette paper has an inorganic powder coating on its surface (coating amount of 0.02 g / cm³). 2 ) cigarette paper; The inorganic powder is a combination of silicate mineral powder and attapulgite powder in a mass ratio of 1:2. The combustion section is composed of plant fiber and carbon powder in a mass ratio of 5:1. The components of the tobacco core segment, by weight, are 35 parts tobacco raw material, 8 parts smoking agent, 0.2 parts tobacco flavoring and 0.15 parts adhesive; The tobacco raw material is tobacco sheet; The smoke-generating agent is a combination of propylene glycol, sorbitol, and glycerin in a mass ratio of 1:1:3; The tobacco flavoring is a combination of sweet orange oil and lemon oil in a mass ratio of 2:1; The adhesive is guar gum and cellulose acetate in a mass ratio of 1:1; The filter tip section is made of cellulose acetate.

[0030] Example 4 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between the heated cigarette and the one in Embodiment 1 is that the inorganic powder is attapulgite powder, and the amount of inorganic powder remains unchanged. Other components and structures are consistent with those in Embodiment 1.

[0031] Example 5 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between the heated cigarette and the one in Embodiment 1 is that the inorganic powder is silicate mineral powder, and the amount of inorganic powder remains unchanged. Other components and structures are consistent with those in Embodiment 1.

[0032] Example 6 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between this heated cigarette and that of Embodiment 1 is that the coating amount of the inorganic powder is 0.002 g / cm³. 2 The components and structure of the cigarettes used are consistent with those in Example 1, and the preparation method is the same as in Example 1.

[0033] Example 7 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between this heated cigarette and that of Embodiment 1 is that the coating amount of the inorganic powder is 0.08 g / cm³. 2The components and structure of the cigarettes used are consistent with those in Example 1, and the preparation method is the same as in Example 1.

[0034] Example 8 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between the heated cigarette and the one in Embodiment 1 is that the smoke-generating agent in the core section is a combination of sorbitol and glycerol in a mass ratio of 1:6, and the amount of smoke-generating agent remains unchanged. Other components and structures are consistent with those in Embodiment 1.

[0035] Example 9 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between the heated cigarette and the one in Embodiment 1 is that the smoke-generating agent in the core section is a combination of propylene glycol and glycerin in a mass ratio of 1:3, and the amount of smoke-generating agent remains unchanged. Other components and structures are consistent with those in Embodiment 1.

[0036] Example 10 This embodiment provides a combustion-type heated cigarette with adjustable combustion rate. The only difference between the heated cigarette and the one in Embodiment 1 is that the smoke-generating agent in the core section is a combination of propylene glycol and sorbitol in a mass ratio of 2:1, and the amount of smoke-generating agent remains unchanged. Other components and structures are consistent with those in Embodiment 1.

[0037] Comparative Example 1 This comparative example provides a heated cigarette, which differs from Example 1 only in that the combustion section is wrapped with ordinary cigarette paper, while the components and structure of the cigarette are consistent with those of Example 1.

[0038] Comparative Example 2 This comparative example provides a conventional combustion-type heated cigarette. The only difference between this heated cigarette and Example 1 is that the combustion section is wrapped with ordinary cigarette paper and the length of the combustion section is 30 mm. The components and other structures of the cigarette are consistent with those of Example 1.

[0039] Test Example 1 The heated cigarettes of Examples 1-10 and Comparative Examples 1-2 were smoked on a smoking machine at a puffing frequency of 30 seconds per puff and a puff volume of 55 mL per puff. After smoking, the combustion time of the burning section was calculated, and the wrapping layer of the cigarette core was cut open with scissors to compare and analyze the carbonization effect of the cigarette core.

[0040] Carbonization effect analysis method: The hot airflow through the tobacco section flows from the end furthest from the filter tip towards the end closest to the filter tip. In the core section, the carbonization of the core material gradually progresses longitudinally from the end furthest from the filter tip towards the end closest to the filter tip. Since the carbonization of the core material is affected by the heat conduction and heat transfer of the regulating section, the carbonization of the core material cross-section is relatively uniform. Therefore, the heating effect of the core material can be compared by analyzing the longitudinal carbonization length. In this invention, the total length of the core section is taken as 100%, and the percentage of the core material carbonization length to the total length represents the core material carbonization effect. The results are shown in Table 1.

[0041] Table 1 Test Example 2: Consumer Sensory Testing Seven consumers who frequently use heated cigarettes were randomly selected and sampled heated cigarettes from Examples 1-6, 8-10, and Comparative Examples 1-2. Consumers were then asked to rate the aroma, taste, and satisfaction of the smoked cigarettes using a 0-9 interval scale. The score for each group was the average of the seven participants. The results are shown in Table 2. The overall evaluation is a comprehensive score given by the expert reviewers to the heated cigarette samples.

[0042] Table 2 Note: Since the cigarettes in Example 7 are difficult to burn, this test case does not include the test of Example 7.

[0043] As can be seen from Tables 1 and 2, compared with Comparative Example 2, the heated cigarettes of Examples 1-3, while reducing the length of the combustion section, achieved the same carbonization rate and combustion time as conventional heated cigarettes wrapped in ordinary cigarette paper with a longer combustion section design, and maintained better sensory quality, specifically in that the uniformity of smoking was significantly improved. Compared with Example 1, the combustion section of Comparative Example 1, due to the use of ordinary cigarette paper, had a significantly shorter combustion time while having the same combustion section length as Example 1. At the end of the combustion section, a large portion of the cigarette core was still not carbonized, resulting in a significantly lower carbonization rate.

[0044] As can be seen from Examples 1 and 4-5 of this invention, the selection of inorganic powder has a significant impact on the combustion rate and combustion time of the combustion section, indicating that the selection of materials with adjustable combustion rate is very important.

[0045] As can be seen from Examples 1 and 6 of the present invention, the coating amount of inorganic powder in the present invention has a great influence on the carbonization rate of the core section. When it is too low, the combustion time is short and the heat source terminates too early, resulting in a poor carbonization effect of the core section.

[0046] As can be seen from Examples 1 and 8-10 of the present invention, the selection of the smoking agent in the core segment affects the aroma, taste and satisfaction of the cigarette of the present invention. Only when it is a specific combination of the present invention can the overall sensory quality of the cigarette be better.

[0047] The applicant declares that this invention illustrates a combustion-type heated cigarette with an adjustable combustion rate through the above embodiments, but this invention is not limited to the above embodiments, that is, it does not mean that this invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials of this invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

[0048] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A combustion-type heated cigarette with adjustable combustion rate, characterized in that, The heated cigarette includes a combustion section, a core section, and a filter section that are coaxially connected in sequence. The combustion section, the core section, and the filter section are formed by wrapping cigarette paper. The cigarette paper wrapped around the combustion section is cigarette paper with an adjustable combustion rate. The adjustable burning rate cigarette paper is cigarette paper with an inorganic powder coating on its surface.

2. The combustion-type heated cigarette with adjustable combustion rate as described in claim 1, characterized in that, The inorganic powder includes any one or a combination of at least two of silicate mineral powder, magnesium hydroxide, or attapulgite powder.

3. The combustion-type heated cigarette with adjustable combustion rate as described in claim 2, characterized in that, The inorganic powder is a combination of silicate mineral powder and attapulgite powder; Preferably, the mass ratio of the silicate mineral powder to the attapulgite powder is 1:(2-4).

4. The combustion-type heated cigarette with adjustable combustion rate as described in any one of claims 1-3, characterized in that, The amount of inorganic powder coated on the surface of cigarette paper is 0.005-0.04 g / cm³. 2 ; Preferably, the inorganic powder is coated on the inner wall of the cigarette paper.

5. The combustion-type heated cigarette with adjustable combustion rate as described in any one of claims 1-4, characterized in that, The combustion section is composed of carbon powder and plant fiber; Preferably, the mass ratio of the carbon powder to the plant fiber is 1:(2-5).

6. The combustion-type heated cigarette with adjustable combustion rate as described in any one of claims 1-5, characterized in that, The components of the core segment include tobacco raw materials, smoking agents, tobacco flavorings, and binders; Preferably, the components of the tobacco core segment include, by weight, 30-50 parts of tobacco raw material, 5-15 parts of smoke-generating agent, 1-2 parts of tobacco flavoring and 0.5-2 parts of binder; Preferably, the tobacco raw material includes any one or a combination of at least two of tobacco sheets, tobacco pellets, or shredded tobacco.

7. The combustion-type heated cigarette with adjustable combustion rate as described in claim 6, characterized in that, The tobacco flavorings include any one or a combination of at least two of the following: sweet orange oil, lemon oil, vanillin, succinate, 2-acetylpyrazine, 2,3,5-trimethylpyrazine, isoamyl isovalerate, menthyl acetate, phenethyl alcohol, furanone, or geraniol. Preferably, the adhesive comprises any one or a combination of at least two of sodium alginate, sodium carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, chitosan, guar gum, or cellulose acetate.

8. The combustion-type heated cigarette with adjustable combustion rate as described in claim 6 or 7, characterized in that, The smoke-generating agent includes any one or a combination of at least two of propylene glycol, glycerin, or sorbitol; Preferably, the smoke-generating agent is a combination of propylene glycol, sorbitol, and glycerin.

9. The combustion-type heated cigarette with adjustable combustion rate as described in any one of claims 1-8, characterized in that, The filter tip is made of cellulose acetate or polylactic acid.

10. The combustion-type heated cigarette with adjustable combustion rate as described in any one of claims 1-9, characterized in that, The combustion section is 10-20 mm long, the core section is 10-30 mm long, and the filter section is 20-40 mm long.

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