Heated cigarette tobacco with anti-yellowing function and preparation and application thereof

Abstract

The present application relates to the field of new type cigarettes, and particularly discloses a method for reducing yellow spots of heated cigarette cut tobacco, characterized in that a film material is coated on the surface of the heated cigarette cut tobacco; the heated cigarette cut tobacco is cut tobacco with a smoke generating agent; and the film material comprises hydroxypropyl methyl cellulose. The present application can effectively solve the problem of yellow spots of cut tobacco based on the film material.

Description

Technical Field

[0001] This invention belongs to the field of heated non-combustible cigarette technology, specifically relating to a technology for preventing yellowing of heated cigarette tobacco. Background Technology

[0002] As people around the world become increasingly health-conscious, heated cigarettes (heated non-combustible cigarettes, a new type of tobacco product) are gaining more and more attention in the consumer market because they "heat tobacco instead of burning tobacco," thus reducing the harmful components produced by the high-temperature combustion and decomposition of tobacco.

[0003] The raw materials used in heated cigarette filler design mainly include glycerin-containing tobacco shreds, tobacco particles, and reconstituted tobacco leaves (tobacco sheets). Center heating generally uses sheets as the filler, with circumferential heating (such as Yunnan Tobacco's Justahug). Sheets are widely used as a tobacco substitute, but because their form is more like paper and differs from natural tobacco leaves, some consumers do not accept them.

[0004] The smoke-generating properties of heated cigarette tobacco are a crucial factor affecting cigarette quality and comfort. To improve this, polyol-based smoke-generating agents such as propylene glycol and glycerin are primarily added to increase smoke concentration. However, these agents easily cause yellowing stains on cigarette paper, affecting sensory experience. Due to the unique structural characteristics of heated cigarette tobacco, it is difficult to integrate various exogenous additives, and the yellowing problem remains an industry-wide challenge. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a method that can effectively prevent yellow spots from forming on heated cigarette tobacco.

[0006] The second objective of this invention is to provide a modified heated cigarette tobacco, tobacco stick, and heated cigarette with anti-yellowing function.

[0007] A method for reducing yellow spots on heated cigarette tobacco involves coating the surface of the heated cigarette tobacco with a film material.

[0008] Heated cigarette tobacco is tobacco mixed with a smoke-generating agent;

[0009] The membrane material contains hydroxypropyl methylcellulose.

[0010] Due to the unique structural characteristics of heated cigarette tobacco, the yellowing problem remains an industry-wide challenge, and currently, there is no satisfactory solution. To address this technical problem, this invention, after years of research, has discovered that coating the surface of heated cigarette tobacco with a hydroxypropyl methylcellulose membrane material can effectively solve the yellowing problem based on a hydrophilic competition mechanism. Furthermore, this does not affect the smoking experience, demonstrating excellent results. This invention's technical solution can effectively improve the storage time of heated cigarette tobacco under high temperature and humidity conditions; moreover, its various physical properties are basically similar to those of existing heated cigarettes, and it does not affect the smoking experience.

[0011] In this invention, the membrane material further includes an auxiliary membrane material, which is at least one selected from povidone, polyvinyl alcohol, methylcellulose, ethylcellulose, carboxymethylcellulose, polylactic acid, polyglutamic acid, and pectin; preferably, the auxiliary membrane material includes povidone and / or methylcellulose. Research in this invention shows that the polymer membrane material based on the aforementioned special combination can unexpectedly further facilitate the resolution of macular problems, reduce the incidence of macular degeneration, and decrease the size of the macular region.

[0012] Preferably, the hydroxypropyl methylcellulose content in the membrane material is 10-90% by weight, more preferably 40-60%. Studies have found that, under the specific compounding method described above, further control of the compounding ratio helps to further improve synergy and reduce the incidence and size of macular degeneration.

[0013] Preferably, the membrane material accounts for 1 to 10% of the weight of the heated cigarette tobacco, and more preferably 3 to 5%. At the preferred proportions, a better synergistic effect of the component combination can be obtained.

[0014] In this invention, the heated cigarette tobacco can be a conventional tobacco material used in the industry; the composite smoke-generating agent can also be a well-known material in the industry.

[0015] Preferably, the smoke-generating agent is a polyol-based smoke-generating agent; preferably, it is at least one of propylene glycol and glycerin.

[0016] Preferably, the content of the smoking agent in the heated cigarette tobacco is 15-25 wt.%.

[0017] Preferably, a membrane solution containing dissolved membrane material is coated or sprayed onto the surface of heated cigarette tobacco; then dried to remove the solvent, thus obtaining the modified heated cigarette tobacco.

[0018] Preferably, the film-forming material is dissolved in a solvent and thoroughly stirred to achieve uniform dispersion, forming a solution or viscous liquid. This solution is then evenly distributed onto the surface of heated cigarette tobacco using a coating or spraying method. After removing the solvent, the solution is applied to the heated cigarette, effectively reducing the formation of yellow spots on the outer surface of the cigarette. This invention has found that coating and spraying methods further enhance synergy with the film material, further reducing the formation of yellow spots.

[0019] In this invention, the solvent in the membrane solution is a solvent that can dissolve the membrane material and is easily volatile and removable.

[0020] Preferably, the solvent in the membrane solution is at least one of water and ethanol; more preferably, it is an ethanol-water solution with a volume ratio of 49%-99%.

[0021] Studies have found that membrane solutions of appropriate concentrations are more effective in preventing macular degeneration.

[0022] Preferably, the weight concentration of the membrane material in the membrane solution is 1%-10%, and more preferably 4%-8%.

[0023] Preferably, the drying method can be room temperature evaporation, hot air drying, freeze drying, or microwave drying.

[0024] Research has shown that low-temperature drying can preserve the aroma components of tobacco to the greatest extent.

[0025] There are no special requirements for the temperature during the drying stage. For example, considering processing costs and process convenience, it can be less than or equal to 60°C, more specifically 30–60°C, and even more specifically 40–50°C. The drying time can be controlled according to the drying needs. For example, when the temperature is higher, the time can be appropriately shortened to consider processing efficiency; conversely, it can be appropriately extended. For example, the drying time of this invention can be 5–30 minutes, and more specifically 10–20 minutes.

[0026] The present invention also provides a modified heated cigarette tobacco with anti-yellowing function, which is prepared by the method described above.

[0027] The present invention also provides a heated cigarette rod with anti-yellowing function, which is a rod made of heated cigarette tobacco rings, wherein the heated cigarette tobacco is the modified heated cigarette tobacco; and / or, the outer surface of the rod is covered with the film material.

[0028] The present invention also provides a heated cigarette with anti-yellowing function, comprising the heated cigarette rod and cigarette paper covering the heated cigarette rod.

[0029] Beneficial effects

[0030] 1. The present invention innovatively discovers that the use of the special polymer membrane material, especially the combined membrane material, helps to effectively reduce the generation of yellow spots on the surface of heated cigarettes even under high temperature and high humidity conditions, thereby greatly increasing the storage period of heated cigarettes.

[0031] 2. The film-forming material used in this invention is inexpensive and readily available, and has no other odor. It does not change the aroma of the heated cigarette itself and has virtually no impact on the sensory quality of the heated cigarette.

[0032] 3. The method of using this invention is simple, the film-forming material is easy to mix evenly with tobacco, and it can be directly used with conventional cigarette rolling equipment to heat and roll cigarette sticks, which is compatible with existing cigarette production and manufacturing processes. Detailed Implementation Plan

[0033] The present invention will be further described below with reference to specific embodiments. These embodiments are intended to illustrate the invention and not to further limit it.

[0034] The amount of membrane material added refers to the weight percentage of the membrane material to the tobacco.

[0035] In this invention, the heated cigarette tobacco is conventional tobacco that has already been treated with glycerin. In the following examples, unless otherwise stated, the glycerin content in the heated cigarette tobacco is 20 wt%.

[0036] Example 1:

[0037] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0038] (1) Hydroxypropyl methylcellulose was dissolved in 90% ethanol-water solution and stirred to prepare a dilute solution with a mass concentration of 4% hydroxypropyl methylcellulose.

[0039] (2) Spray the dilute solution evenly onto the heated cigarette tobacco that has been treated with the smoking agent. The amount of hydroxypropyl methylcellulose added is 4% (w / w).

[0040] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0041] Example 2:

[0042] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0043] (1) Hydroxypropyl methylcellulose and polyvinyl ketone were dissolved in a 90% ethanol-water solution at a ratio of 1:1 and stirred to prepare a dilute solution with a total polymer mass concentration of 4%.

[0044] (2) Spray the dilute solution evenly onto the heated cigarette tobacco with added smoke-generating agent. The total amount of film-forming material added is 4% (w / w).

[0045] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0046] Example 3:

[0047] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0048] (1) Hydroxypropyl methylcellulose and polyvinyl ketone were dissolved in a 90% ethanol-water solution at a ratio of 1:1 and stirred to prepare a dilute solution with a total mass concentration of 4%.

[0049] (2) Spray the dilute solution evenly onto the heated cigarette tobacco that has been treated with the smoking agent. The total amount of film-forming material added is 1% (w / w).

[0050] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0051] Example 4:

[0052] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0053] (1) Hydroxypropyl methylcellulose and polyvinyl ketone were dissolved in a 90% ethanol-water solution at a ratio of 1:1 and stirred to prepare a dilute solution with a total mass concentration of 8%.

[0054] (2) Spray the dilute solution evenly onto the heated cigarette tobacco that has been treated with the smoking agent. The total amount of film-forming material added is 1% (w / w).

[0055] (3) Dry the tobacco shreds. The drying conditions are hot air drying at 50℃ for 10 minutes.

[0056] Example 5:

[0057] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0058] (1) Hydroxypropyl methylcellulose, polyvinyl ketone and methylcellulose were dissolved in 90% ethanol-water solution in a ratio of 2:1:1 and stirred to prepare a dilute solution with a total mass concentration of 4%.

[0059] (2) Spray the dilute solution evenly onto the heated cigarette tobacco with added smoke-generating agent. The total amount of film-forming material added is 4% (w / w).

[0060] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0061] Comparative Example 1:

[0062] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0063] (1) Dissolve povidone in 90% ethanol-water solution and stir to prepare a dilute solution with a povidone mass concentration of 4%.

[0064] (2) Spray the dilute solution evenly onto the heated cigarette tobacco that has been treated with the smoking agent. The amount of povidone added is 4% (w / w).

[0065] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0066] Comparative Example 2:

[0067] A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco includes the following steps:

[0068] (1) Polyvinyl ketone and polyvinyl alcohol were dissolved in a 1:1 ratio in a 90% ethanol-water solution and stirred to prepare a dilute solution with a total mass concentration of 4%.

[0069] (2) Spray the dilute solution evenly onto the heated cigarette tobacco with added smoke-generating agent. The total amount of film-forming material added is 4% (w / w).

[0070] (3) Dry the tobacco shreds. The drying conditions are 40℃ hot air drying for 20 minutes.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0072] Heated cigarette cores made from tobacco treated with membrane material were stored under high temperature and high humidity conditions (temperature 35℃, humidity 60%). Records were recorded after 1 day, 3 days, and 14 days, and the size of the yellow spots was measured. The percentage of cigarettes with yellow spots out of 100 cigarettes was counted. (Note: Some cigarettes have multiple yellow spots, but when calculating the yellow spot rate, the same cigarette with multiple yellow spots is considered as one yellow-spotted cigarette.) The results are shown in Table 1.

[0073] Table 1 Evaluation of the film-forming effect of heated cigarette materials

[0074]

[0075] In summary, the membrane materials described in this invention can unexpectedly achieve good macular suppression effects. In particular, the membrane materials with special synergistic combinations can further synergistically suppress the number of macular follicles and the proportion of tobacco shreds with macular follicles.

Claims

1. A method for reducing yellowing spots caused by moisture absorption in heated cigarette tobacco, characterized in that, A film material is coated onto the surface of heated cigarette tobacco. Heated cigarette tobacco is tobacco mixed with a smoke-generating agent; The membrane material comprises hydroxypropyl methylcellulose; it also comprises an auxiliary membrane material, which is povidone, or a mixture of povidone and methylcellulose in a weight ratio of 1:

1. In the membrane material, the weight content of hydroxypropyl methylcellulose is 40-60%; The membrane material is 3-5% of the tobacco used in heated cigarettes; The smoke-generating agent is a polyol-based smoke-generating agent; The content of smoking agent in heated cigarette tobacco is 15~25 wt.%.

2. The method as described in claim 1, characterized in that, The smoke-generating agent is at least one of propylene glycol and glycerin.

3. The method according to any one of claims 1 to 2, characterized in that, A membrane solution containing dissolved membrane material is coated or sprayed onto the surface of heated cigarette tobacco using a coating or spraying method; followed by drying.

4. The method as described in claim 3, characterized in that, The solvent in the membrane solution is at least one of water and ethanol.

5. The method as described in claim 4, characterized in that, The solvent in the membrane solution is an ethanol-water solution with a volume ratio of 49% to 99%.

6. The method as described in claim 3, characterized in that, In the membrane solution, the weight concentration of the membrane material is 1% to 10%.

7. The method as described in claim 3, characterized in that, The drying methods include room temperature evaporation, hot air drying, freeze drying, or microwave drying.

8. The method as described in claim 7, characterized in that, The temperature during the drying stage is less than or equal to 60℃.

9. A modified heated tobacco shred with anti-yellowing function, characterized in that, It is prepared by the method described in any one of claims 1 to 8.

10. A heated cigarette rod with anti-yellowing function, characterized in that, It is a round rod made from heated cigarette tobacco rings, wherein the heated cigarette tobacco is the modified heated cigarette tobacco as described in claim 9.

11. A heated cigarette with anti-yellowing function, characterized in that, It includes the heated cigarette rod as described in claim 10, and the cigarette paper covering the heated cigarette rod.

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