Preparation method for shag for heat-not-burn cigarette

Abstract

This application provides a method for manufacturing tobacco shreds for a heat not burn cigarette. The method includes: (1) loosening and conditioning a tobacco leaf, to obtain a tobacco flake; (2) spraying a first smoking agent onto the tobacco flake; (3) storing, at a room temperature, the tobacco flake onto which the first smoking agent is sprayed; (4) cutting the tobacco flake into shreds; (5) spraying a second smoking agent onto the tobacco shreds; (6) baking the tobacco shreds; (7) cooling the tobacco shreds to the room temperature, and spraying the tobacco shreds with flavor; and (8) storing the tobacco shreds at the room temperature, to obtain tobacco shreds for a heat not burn cigarette.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202311422175.7, filed on October 30, 2023, which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the technical field of tobacco, and in particular, to a method for manufacturing tobacco shreds for a heat not burn cigarette.BACKGROUND

[0003] A heat not burn cigarette product is a novel tobacco product that uses a specific electronic device to heat (250°C to 350°C) a specific core material without burning to release a flavor and aroma component. Because the heat not burn cigarette product has a special heating manner, conventional tobacco shreds for a cigarette or the like cannot be directly used as a core material of the heat not burn cigarette product. However, a core material of an existing heat not burn cigarette is mostly manufactured by reconstructing a tobacco leaf, a granule, a stem shred, a stem granule, or the like through a thick slurry method, a rolling method, a paper making method, a dry method, and the like. A process thereof is mostly made by reconstructing a form of a raw material of the tobacco leaf. Although the core material of an existing heat not burn cigarette has high plasticity, has a high content of a loaded atomizing agent (a smoking agent), and has a high degree of homogenization, a processing process of the core material of an existing heat not burn cigarette causes a loss of a natural aroma component of the tobacco, and has low a reduction degree of the original aroma of the tobacco after heating. In addition, there are also some technical solutions in which the smoking agent is directly added by using the conventional tobacco shreds as a heat not burn core material for use. However, problems such as low efficiency of absorption of the smoking agent and poor uniformities and easy curling of the tobacco shreds in a rolling process are usually likely to occur. Consequently, release of a fragrance substance from the heat not burn cigarette product is affected, and problems such as the low reduction degree and poor consistency of the original aroma of the tobacco are caused.

[0004] Therefore, an existing method for manufacturing tobacco shreds for a heat not burn cigarette still needs to be improved.SUMMARY

[0005] This application is intended to resolve alleviate or resolve at least one of the foregoing problems at least to some extent.

[0006] According to an aspect of this application, this application provides a method for manufacturing tobacco shreds for a heat not burn cigarette. In some embodiments of this application, the method for manufacturing tobacco shreds for a heat not burn cigarette includes the following steps: (1) loosening and conditioning a tobacco leaf, to obtain a tobacco flake; (2) spraying a first smoking agent onto the tobacco flake, where the first smoking agent includes polybasic alcohol; (3) storing, at a room temperature, the tobacco flake onto which the first smoking agent is sprayed; (4) cutting the stored tobacco flake into shreds; (5) spraying a second smoking agent onto the tobacco shreds, where the second smoking agent includes the polybasic alcohol; (6) baking the tobacco shreds obtained in step (5); (7) cooling the tobacco shreds to the room temperature, and spraying the tobacco shreds with flavor; and (8) storing the tobacco shreds sprayed with the flavor at the room temperature, to obtain tobacco shreds for a heat not burn cigarette. Therefore, in this application, the smoking agent is added in portions, so that efficiency of absorbing of the smoking agent by the tobacco flake or the tobacco shreds can be improved, and the smoking agent is more evenly distributed in the tobacco shreds, thereby helping release of an aroma of the tobacco and improving user experience.

[0007] In some embodiments of this application, in step (7), if a total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 25% of an initial mass of the tobacco leaf, the tobacco shreds are cooled to the room temperature and sprayed with the flavor; and if the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaf, step (5) and step (6) are performed until the total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 25% of the initial mass of the tobacco leaf, and then the tobacco shreds are cooled to the room temperature and sprayed with the flavor.

[0008] In some embodiments of this application, step (5) and step (6) are both performed twice or 3 times in the process of manufacturing tobacco shreds for a heat not burn cigarette. Therefore, efficiency of absorbing the smoking agent by the tobacco shreds can be further improved, to further improve distribution uniformity of the smoking agent.

[0009] In some embodiments of this application, in step (1), a moisture content of the tobacco flake ranges from 18% to 26%. The water content of the tobacco flake is within the foregoing range, which helps loosen the tobacco leaf, thereby improving an effect of absorbing the smoking agent, a feed liquid, and the like by the tobacco flake.

[0010] In some embodiments of this application, in step (2), a mass of the first smoking agent ranges from 2% to 7% of the initial mass of the tobacco leaf; and / or in step (5), a mass of the second smoking agent ranges from 5% to 10% of the initial mass of the tobacco leaf. An addition amount of the first smoking agent is relatively small, so that the first smoking agent can be more sufficiently absorbed by the tobacco flake in a subsequent storage process, and the first smoking agent can also have a function flexing the tobacco flake. If the addition amount of the second smoking agent is within the foregoing range, the second smoking agent is absorbed more sufficiently by the tobacco shreds, thereby helping improve quality of the tobacco shreds.

[0011] In some embodiments of this application, in step (2), the method further includes: spraying a feed liquid onto the tobacco flake; and / or; and / or in step (5), the method further includes: spraying the feed liquid onto the tobacco shreds, where the feed liquid includes at least one of tobacco extract, fruit extract, or sugar. The addition of the feed liquid helps increase a reduction degree of an original aroma of the tobacco.

[0012] In some embodiments of this application, in step (2), a mass of the feed liquid ranges from 1% to 5% of the initial mass of the tobacco leaf; and / or in step (5), the mass of the feed liquid ranges from 1% to 5% of the initial mass of the tobacco leaf. Therefore, the addition of a specific amount of the feed liquid helps increase the reduction degree of the original aroma of the tobacco.

[0013] In some embodiments of this application, in step (3), the tobacco flake is stored at the room temperature for 2h to 6h; and / or in step (8), the tobacco shreds are stored at the room temperature for 2h to 6h.

[0014] In some embodiments of this application, in step (4), the tobacco shreds with the length ranging from 4 mm to 10 mm are obtained through cutting. The length of the cut tobacco shreds ranges from 4 mm to 10 mm, which can significantly reduce probability of curling of the tobacco shreds in a rolling process.

[0015] In some embodiments of this application, in step (6), the tobacco shreds are baked until a moisture content thereof ranges from 8% to 10%. In some embodiments of this application, in step (6), a temperature for baking the tobacco shreds ranges from 110°C to 125°C.

[0016] In some embodiments of this application, in step (7), the flavor includes at least one of tobacco absolute, flower and fruit absolute, or menthol flavor; and / or a mass of the flavor ranges from 0.5% to 3% of the initial mass of the tobacco leaf.

[0017] In some embodiments of this application, the tobacco leaf includes at least one of flue-baked tobacco or sun-baked tobacco.BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The foregoing and / or additional aspects and advantages of this application are to become apparent and easy to understand in the description of the embodiments made with reference to the following accompanying drawings.

[0019] FIG. 1 is a flowchart of manufacturing tobacco shreds according to an embodiment of this application.DETAILED DESCRIPTION

[0020] Embodiments of this application are described in detail below. The embodiments described below are exemplary and used only for explaining this application, and should not be construed as a limitation on this application.

[0021] This application is provided based on discovery and understanding of the inventor with respect to the following facts and problems.

[0022] A core material of a heat not burn cigarette is manufactured by reconstructing a form of a raw material of a tobacco leaf. Although the core material of an existing heat not burn cigarette has high plasticity, has a high content of a loaded atomizing agent (a smoking agent), and has a high degree of homogenization, a processing process of the core material of an existing heat not burn cigarette causes a loss of a natural aroma component of the tobacco, and has a low reduction degree of the original aroma of the tobacco after heating. A process of directly adding a smoking agent as a heat not burn core material by using conventional tobacco shreds is generally adding the atomizing agent all at once after the tobacco shreds are cut. In this way, an atomizing agent has low absorbing efficiency and the atomizing agent has poor distribution uniformity. In addition, in a process of rolling a cigarette core, the tobacco shreds are excessively long and are easy to curl, resulting in a large gap between the tobacco shreds and low heat transfer efficiency. Consequently, release of a fragrance substance from the heat not burn cigarette product is affected, and problems such as a low reduction degree and poor consistency of the original aroma of the tobacco are caused. The inventor finds that a manner of adding a small quantity of the smoking agent for multiple times may be used to improve efficiency of absorption of the smoking agent and improve distribution uniformity of the smoking agent, so as to improve overall uniformity of a vapor amount in an inhalation process and increase the number of times of inhalation. In addition, during cutting into shreds, the length of the cut tobacco shreds ranges from 4 mm to 10 mm, which can significantly reduce probability of curling of the tobacco shreds in a rolling process.

[0023] In view of this, according to an aspect of this application, this application provides a method for manufacturing tobacco shreds for a heat not burn cigarette. In some embodiments of this application, referring to FIG. 1, a method for manufacturing tobacco shreds for a heat not burn cigarette may include the following steps. (1) Loosening and conditioning a tobacco leaf, to obtain a tobacco flake.

[0024] In the step, the tobacco leaf is loosened and conditioned, to obtain a tobacco flake, where a moisture content of the tobacco flake ranges from 18% to 26%. In some embodiments of this application, the moisture content of the tobacco flake may be 18%, 20%, 21%, 22%, 24%, 26%, or the like. The moisture content of the tobacco flake is within the foregoing range, which helps loosen the tobacco leaf. In addition, an absorbing property of the tobacco flake for a feed liquid can be further improved.

[0025] It should be noted that, the "tobacco leaf" refers to a flake of the tobacco obtained after re-baking, and is usually packed together in a large box and placed in a stacked manner, which is dense and tightly. The "tobacco leaf" is turned into the "tobacco flake" after being loosened and conditioned.

[0026] In some embodiments of this application, the tobacco leaf may include at least one of flue-baked tobacco or sun-baked tobacco. In some specific embodiments of this application, the tobacco leaf may be the flue-baked tobacco. In some other specific embodiments of this application, the tobacco leaf may be the sun-baked tobacco (including at least one of burley tobacco, flavor tobacco, or cigar).

[0027] (2) Spraying a first smoking agent onto the tobacco flake.

[0028] In this step, the first smoking agent is sprayed onto the tobacco flake. The first smoking agent may include polybasic alcohol. The addition of the first smoking agent may improve processing resistance of the tobacco flake and reduce fragmentation. In addition, an addition ratio of the second smoking agent in the subsequent step (5) may be reduced, so that the second smoking agent is more easily absorbed by the tobacco shreds.

[0029] In some embodiments of this application, the polybasic alcohol in the first smoking agent may include at least one of propylene glycol or glycerol. The foregoing polybasic alcohol has a good atomization performance, and can carry out the aroma of the tobacco during an inhalation process.

[0030] In some embodiments of this application, in step (2), a mass of the first smoking agent may range from 2% to 7% of the initial mass of the tobacco leaf. For example, the mass of the first smoking agent may be 2%, 4%, 5%, 6%, 7%, or the like of the initial mass of the tobacco leaf. The mass of the first smoking agent is within the foregoing range, and the first smoking agent may be more fully absorbed by the tobacco flake in a subsequent storage process. In addition, the foregoing mass of the first smoking agent may have a function flexing the tobacco leaf, and is not easy to form a lump during cutting into shreds.

[0031] In some embodiments of this application, in step (2), the mass of the first smoking agent may range from 3% to 5% of the initial mass of the tobacco leaf. For example, the mass of the first smoking agent may be 3%, 3.5%, 4%, 4.5%, 5%, or the like of the initial mass of the tobacco leaf. The first smoking agent having the foregoing mass may also have a function flexing the tobacco leaf, and is not easy to form a lump during cutting into shreds.

[0032] In some embodiments of this application, in step (2), the first smoking agent and the feed liquid may be sprayed onto the tobacco flake. In some embodiments of this application, the feed liquid may include at least one of tobacco extract, fruit extract, sugar, or the like. Therefore, the addition of the feed liquid can highlight features of the aroma of the tobacco, thereby further improving user experience.

[0033] In some embodiments of this application, in step (2), the mass of the feed liquid sprayed onto the tobacco flake may range from 1% to 5% of the initial mass of the tobacco leaf. For example, the mass of the feed liquid may be 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5%, or the like of the initial mass of the tobacco leaf. The feed liquid having the foregoing mass may improve taste of the tobacco to some extent.

[0034] (3) Storing, at a room temperature, the tobacco flake onto which the first smoking agent is sprayed.

[0035] In some embodiments of this application, the tobacco flake onto which the first smoking agent is sprayed is stored at the room temperature, so that the tobacco flake absorbs the first smoking agent.

[0036] In some embodiments of this application, the tobacco flake onto which the first smoking agent is sprayed may be stored at the room temperature for 2h, 3h, 4h, 5h, 6h, or the like. In this way, absorption of the first smoking agent can be promoted.

[0037] In some embodiments of this application, in step (3), the tobacco flake may be stored at the room temperature for 4h to 6h, for example, may be stored for 4h, 4.5h, 5h, 5.5h, 6h, or the like. In this way, the absorption of the first smoking agent may be further promoted, so as to further improve quality of the tobacco shreds.

[0038] In some embodiments of this application, in step (2), the first smoking agent and the feed liquid are sprayed onto the tobacco flake. In step (3), the tobacco flake onto which the first smoking agent and the feed liquid are sprayed are stored at the room temperature for 2h to 6h, which may promote absorption of the first smoking agent and the feed liquid.

[0039] In this specification, the "room temperature" may range from 15°C to 30°C. For example, the "room temperature" may be 15°C, 18°C, 20°C, 23°C, 25°C, 27°C, 30°C, or the like.

[0040] (4) Cutting the stored tobacco flake into shreds.

[0041] In some embodiments of this application, the stored tobacco flake is cut into shreds, to obtain tobacco shreds with the length ranging from 4 mm to 10 mm. For example, the length of the tobacco shreds may be 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, or the like. The length of the tobacco shreds is within the foregoing range, which helps roll. In addition, curling does not easily occur during a rolling process. After the rolling, the tobacco shreds are tightly adhered to each other. Therefore, the tobacco shreds have high heat transfer efficiency during a heat process, which helps release of a fragrance substance.

[0042] In some embodiments of this application, in step (4), the length of the tobacco shreds may range from 6 mm to 8 mm, for example, the length may be 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, or the like. The tobacco shreds with the foregoing length are more beneficial to rolling, and are less easy to curl in a rolling process, thereby helping improve the heat transfer efficiency in the heat process and promoting release of the fragrance substance.

[0043] The width of the tobacco shreds is not specifically limited in this application, and a person skilled in the art may select and set the width of the tobacco shreds based on an actual requirement. In some embodiments of this application, the width of the tobacco shreds may range from 0.8 mm to 1.2 mm. For example, the width of the tobacco shreds may be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.1 mm, 1.2 mm, or the like.

[0044] (5) Spraying a second smoking agent onto the tobacco shreds.

[0045] After cutting into shreds, the second smoking agent is sprayed onto the tobacco shreds, where the second smoking agent may include the polybasic alcohol. In some embodiments of this application, the polybasic alcohol in the second smoking agent may include at least one of propylene glycol or glycerol.

[0046] In some embodiments of this application, the second smoking agent may be the same as the first smoking agent, that is, compositions and ratios of the second smoking agent and the first smoking agent are the same. In some other embodiments of this application, the second smoking agent may be different from the first smoking agent, that is, a composition and / or ratio of the second smoking agent is different from that of the first smoking agent.

[0047] In some embodiments of this application, in step (5), a mass of the second smoking agent may range from 5% to 10% of the initial mass of the tobacco leaf. For example, the mass of the second smoking agent may be 5%, 6%, 7%, 8%, 9%, 10%, or the like of the initial mass of the tobacco leaf. An addition amount of the second smoking agent is within the foregoing range, so that the second smoking agent is fully absorbed by the tobacco shreds. The inventor finds that if the second smoking agent is added in an excessively large amount in a single time, it is difficult for the second smoking agent to be fully absorbed by the tobacco shreds. Consequently, the second smoking agent is adhered only to the surfaces of the tobacco shreds. The smoking agent is likely to leak out after the rolling, and the leaked smoking agent may pollute a cigarette paper.

[0048] In some embodiments of this application, in step (5), the mass of the second smoking agent may range from 6% to 8% of the initial mass of the tobacco leaf. For example, the mass of the second smoking agent may be 6%, 6.5%, 7%, 7.5%, 8%, or the like of the initial mass of the tobacco leaf. The addition amount of the second smoking agent is within the foregoing range, the second smoking agent may be relatively sufficiently absorbed by the tobacco shreds, and the smoking agent is not easily leaked in a subsequent rolling process.

[0049] In some embodiments of this application, in step (5), the second smoking agent and the feed liquid may be sprayed onto the tobacco shreds, where the feed liquid includes at least one of tobacco extract, fruit extract, or sugar. The addition of the feed liquid can highlight features of the aroma of the tobacco, thereby further improving user experience.

[0050] In some embodiments of this application, in step (5), the mass of the feed liquid sprayed onto the tobacco shreds may range from 1% to 5% of the initial mass of the tobacco leaf. For example, the mass of the feed liquid may be 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5%, or the like of the initial mass of the tobacco leaf. The feed liquid having the foregoing mass may improve taste of the tobacco to some extent.

[0051] (6) Baking the tobacco shreds obtained in step (5).

[0052] In some embodiments of this application, after the second smoking agent is sprayed, the tobacco shreds may be baked until the moisture content in the tobacco shreds range from 8% to 10%. In some embodiments of this application, after the baking, the moisture content in the tobacco shreds may be 8%, 8.5%, 9%, 9.5%, 10%, or the like.

[0053] In some embodiments of this application, in step (6), the temperature for baking the tobacco shreds may range from 110°C to 125°C. For example, the temperature for baking the tobacco shreds may be 110°C, 112°C, 114°C, 120°C, 125°C, or the like. The baking temperature is set within the foregoing range, so that some moisture in the tobacco shreds can be removed in a short time, and no substance such as the smoking agent added to the tobacco shreds is obviously lost.

[0054] In some embodiments of this application, in step (6), the temperature for baking the tobacco shreds may range from 115°C to 125°C. For example, the temperature for baking the tobacco shreds may be 115°C, 116°C, 118°C, 120°C, 122°C, 125°C, or the like. In this way, some moisture in the tobacco shreds may be quickly removed, a process time is shortened, and a mass of a substance such as the smoking agent is not obviously reduced.

[0055] (7) If a total mass of the smoking agent in the tobacco shreds ranges from 15% to 25% of an initial mass of the tobacco leaf, the tobacco shreds are cooled to the room temperature and sprayed with the flavor; and if the total mass of the smoking agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaf, step (5) and step (6) are performed until the total mass of the smoking agent in the tobacco shreds ranges from 15% to 25% of the initial mass of the tobacco leaf, and then the tobacco shreds are cooled to the room temperature and sprayed with the flavor.

[0056] In some embodiments of this application, after step (5) and step (6) are respectively performed once, a total mass of the first smoking agent and the second smoking agent in the tobacco shreds range from 15% to 25% of the initial mass of the tobacco leaf. For example, the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is 15%, 18%, 20%, 22%, 25%, or the like of the initial mass of the tobacco leaf. Then, the tobacco shreds may be cooled to the room temperature, and the tobacco shreds are sprayed with the flavor.

[0057] In some other embodiments of this application, after step (5) and step (6) are respectively performed once, if the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaf, step (5) and step (6) are performed until the total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 25% of the initial mass of the tobacco leaf, and then the tobacco shreds are cooled to the room temperature and sprayed with the flavor.

[0058] In some specific embodiments of this application, step (5) and step (6) are both performed twice. That is, after step (5) and step (6) are respectively performed once, the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaf, and after step (5) and step (6) are both performed twice, the total mass of the first smoking agent and the second smoking agent in the tobacco shreds reaches 15% to 25% of the initial mass of the tobacco leaf.

[0059] In some specific embodiments of this application, step (5) and step (6) are both performed 3 times. That is, after step (5) and step (6) are both performed twice, the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is still less than 15% of the initial mass of the tobacco leaf, and after step (5) and step (6) are both performed 3 times, the total mass of the first smoking agent and the second smoking agent in the tobacco shreds reaches 15% to 25% of the initial mass of the tobacco leaf.

[0060] In some embodiments of this application, in step (7), when the total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 18% of the initial mass of the tobacco leaf, the flavor is sprayed again. For example, when the total mass of the smoking agent in the tobacco shreds is 15%, 15.5%, 16%, 16.5%, 17%, 17.5%, or 18% of the initial mass of the tobacco leaf, the flavor is sprayed again.

[0061] In some embodiments of this application, the flavor may include at least one of tobacco absolute, flower and fruit absolute, or menthol flavor. The addition of the flavor can improve a reduction degree of an original aroma of the tobacco or increase characteristic aroma, thereby improving taste of the tobacco. In some specific embodiments of this application, the flavor may be the tobacco absolute, the flower and fruit absolute, the menthol flavor, or the like. In some other specific embodiments of this application, the flavor may alternatively include two or more of the tobacco absolute, the flower and fruit absolute, the menthol flavor, or the like.

[0062] In some embodiments of this application, a mass of the flavor may range from 0.5% to 3% of the initial mass of the tobacco leaf. For example, the mass of the flavor may be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, or the like of the initial mass of the tobacco leaf.

[0063] In some embodiments of this application, the mass of the flavor may range from 0.5% to 1% of the initial mass of the tobacco leaf. For example, the mass of the flavor may be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, or the like of the initial mass of the tobacco leaf. The addition amount of the flavor is within the foregoing range, and may have a function of improving the reduction degree of the original aroma of the tobacco or increasing the characteristic aroma to some extent.

[0064] (8) Storing, at the room temperature, the tobacco shreds sprayed with the flavor.

[0065] In some embodiments of this application, after the flavor is sprayed, the tobacco shreds may be stored at the room temperature for 2h to 6h, to obtain the tobacco shreds for a heat not burn cigarette. In some embodiments of this application, after the flavor is sprayed, the tobacco shreds are stored at the room temperature for 2h, 3h, 4h, 5h, 6h, or the like, and the tobacco shreds may sufficiently adsorb the flavor, thereby helping release of the aroma in a heating process.

[0066] In some embodiments of this application, in step (8), the tobacco shreds may be stored at the room temperature for 4h to 6h. For example, the tobacco shreds may be stored at the room temperature for 4h, 4.5h, 5h, 5.5h, 6h, or the like. Therefore, the added flavor may be sufficiently absorbed by the tobacco shreds, and the tobacco releases the aroma more easily in a heating process.

[0067] Based on the above, the method provided in this application is used for manufacturing the tobacco shreds for a heat not burn cigarette, and the smoking agent is added in portions, where the addition times is greater than or equal to 2, so that the tobacco leaf or the tobacco shreds has high efficiency of absorbing the smoking agent, and the smoking agent is evenly distributed. Further, the length of the tobacco shreds obtained by cutting into shreds ranges from 4 mm to 10 mm. Therefore, the tobacco shreds re not easy to curl during the rolling process, and the tobacco shreds are tightly adhered to each other. The tobacco shreds after the rolling have high heat transfer efficiency, helping release the fragrance substance. The tobacco shreds for a heat not burn cigarette manufactured by using the method provided in this application are rolled to form a heat not burn cigarette core. The tobacco has a high reduction degree of the original aroma, and sensory quality is obviously higher than that of a reconstructed tobacco leaf and a cigarette core in a granule form. In addition, the method provided in this application is used to manufacture the tobacco shreds for a heat not burn cigarette, so that an existing production line of a cigarette enterprise can be directly used, and only a cutting machine needs to be reconstructed, thereby reducing production costs.

[0068] This application is described below through specific embodiments. A person skilled in the art may understand that the following specific embodiments are merely for illustrative purposes, and are not intended to limit the scope of this application in any way. In addition, in the following embodiments, unless otherwise specified, materials and equipment used are all commercially available. If specific processing conditions and processing methods are not explicitly described in the following embodiments, processing may be performed by using conditions and methods well-known in the art.Embodiment 1

[0069] (1) A tobacco leaf is loosened and conditioned, to obtain a tobacco flake with a moisture content of 20%; (2) Glycerol and tobacco extract are sprayed onto the tobacco flake, where a mass of the glycerol is 5% of an initial mass of the tobacco leaf, and a mass of the tobacco extract is 5% of the initial mass of the tobacco leaf; (3) The tobacco flake is stored at a room temperature for 6h; (4) The stored tobacco flake is cut into shreds with a fixed length, to obtain tobacco shreds having the width of 1 mm and the length of 6 mm; (5) The glycerol is sprayed onto the tobacco shreds, where a mass of the glycerol is 5% of the initial mass of the tobacco leaf; (6) The tobacco shreds are baked at 115°C until the moisture content in the tobacco shreds is 8%; (7) The glycerol is sprayed onto the tobacco shreds again, where a mass of the glycerol is 5% of the initial mass of the tobacco leaf, and the tobacco shreds are baked at 115°C until the moisture content in the tobacco shreds is 8%; and the tobacco shreds are cooled to a room temperature, and tobacco absolute is sprayed onto the tobacco shreds, where the mass of the tobacco absolute is 0.5% of the initial mass of the tobacco leaf; and (8) The tobacco shreds are stored at the room temperature for 6h, and the tobacco shreds are rolled. Embodiment 2

[0070] (1) A tobacco leaf is loosened and conditioned, to obtain a tobacco flake with a moisture content of 22%; (2) Glycerol and tobacco extract are sprayed onto the tobacco flake, where a mass of the glycerol is 4% of an initial mass of the tobacco leaf, and a mass of the tobacco extract is 3% of the initial mass of the tobacco leaf; (3) The tobacco flake is stored at a room temperature for 4h; (4) The stored tobacco flake is cut into shreds with a fixed length, to obtain tobacco shreds having the width of 1 mm and the length of 8 mm; (5) The glycerol is sprayed onto the tobacco shreds, where a mass of the glycerol is 6% of the initial mass of the tobacco leaf; (6) The tobacco shreds are baked at 120°C until the moisture content in the tobacco shreds is 8%; (7) The glycerol is sprayed onto the tobacco shreds again, where a mass of the glycerol is 8% of the initial mass of the tobacco leaf, and the tobacco shreds are baked at 125°C until the moisture content in the tobacco shreds is 8%; and the tobacco shreds are cooled to a room temperature, and the tobacco absolute and menthol essence are sprayed onto the tobacco shreds, where a mass of the tobacco absolute is 0.5% of the initial mass of the tobacco leaf, and a mass of the menthol essence is 0.5% of the initial mass of the tobacco leaf; and (8) The tobacco shreds are stored at the room temperature for 5h, and the tobacco shreds are rolled. Embodiment 3

[0071] (1) A tobacco leaf is loosened and conditioned, to obtain a tobacco flake with a moisture content of 20%; (2) Glycerol and tobacco extract are sprayed onto the tobacco flake, where a mass of the glycerol is 5% of an initial mass of the tobacco leaf, and a mass of the tobacco extract is 5% of the initial mass of the tobacco leaf; (3) The tobacco flake is stored at a room temperature for 6h; (4) The stored tobacco flake is cut into shreds with a fixed length, to obtain tobacco shreds having the width of 1 mm and the length of 20 mm; (5) The glycerol is sprayed onto the tobacco shreds, where a mass of the glycerol is 5% of the initial mass of the tobacco leaf; (6) The tobacco shreds are baked at 115°C until the moisture content in the tobacco shreds is 8%; (7) The glycerol is sprayed onto the tobacco shreds again, where a mass of the glycerol is 5% of the initial mass of the tobacco leaf, and the tobacco shreds are baked at 115°C until the moisture content in the tobacco shreds is 8%; and the tobacco shreds are cooled to a room temperature, and tobacco absolute is sprayed onto the tobacco shreds, where the mass of the tobacco absolute is 0.5% of the initial mass of the tobacco leaf; and (8) The tobacco shreds are stored at the room temperature for 6h, and the tobacco shreds are rolled. Comparative example 1

[0072] (1) A tobacco leaf is loosened and conditioned, to obtain a tobacco flake with a moisture content of 22%; (2) Tobacco extract is sprayed onto the tobacco flake, where a mass of the tobacco extract is 3% of the initial mass of the tobacco leaf; (3) The tobacco flake is stored at a room temperature for 4h; (4) The stored tobacco flake is cut into shreds with a fixed length, to obtain tobacco shreds having the width of 1 mm and the length of 20 mm; (5) Glycerol is sprayed onto the tobacco shreds, where a mass of the glycerol is 18% of the initial mass of the tobacco leaf, and the tobacco shreds are baked at 120°C until the moisture content in the tobacco shreds is 8%; and the tobacco shreds are cooled to a room temperature, and the tobacco absolute and menthol essence are sprayed onto the tobacco shreds, where a mass of the tobacco absolute is 0.5% of the initial mass of the tobacco leaf, and a mass of the menthol essence is 0.5% of the initial mass of the tobacco leaf; and (6) The tobacco shreds are stored at the room temperature for 5h, and the tobacco shreds are rolled.

[0073] A difference between comparative example 1 and Embodiment 2 lies in that, in comparative example 1, the cut tobacco shreds have long lengths, and the glycerol is not added in portions.Comparative example 2

[0074] (1) A tobacco leaf is loosened and conditioned, to obtain a tobacco flake with a moisture content of 22%; (2) Glycerol and tobacco extract are sprayed onto the tobacco flake, where a mass of the glycerol is 18% of an initial mass of the tobacco leaf, and a mass of the tobacco extract is 3% of the initial mass of the tobacco leaf; (3) The tobacco flake is stored at a room temperature for 4h; (4) The stored tobacco flake is cut into shreds with a fixed length, to obtain tobacco shreds having the width of 1 mm and the length of 8 mm; (5) The tobacco shreds are baked at 125°C until the moisture content in the tobacco shreds is 8%; and the tobacco shreds are cooled to a room temperature, and the tobacco absolute and menthol essence are sprayed onto the tobacco shreds, where a mass of the tobacco absolute is 0.5% of the initial mass of the tobacco leaf, and a mass of the menthol essence is 0.5% of the initial mass of the tobacco leaf; and (6) The tobacco shreds are stored at the room temperature for 5h, and the tobacco shreds are rolled.

[0075] A difference between comparative example 2 and Embodiment 2 lies in that, in comparative example 2, the glycerol is not added in portions.

[0076] Products manufactured in Embodiment 1, Embodiment 2, Embodiment 3, and comparative examples are separately made into a heat not burn cigarette core, and the heat not burn cigarette core is balanced for 24 hours in an environment with a temperature ranging from 22°C to 25°C and a relative humidity ranging from 30% to 40%. According to a sensory evaluation standard of the tobacco product, a smoking evaluation team consisting of 9 smoking evaluation experts is organized to perform sensory evaluation on the heat not burn cigarette core of the embodiments and the comparative examples. Evaluation results of the inhalation are shown in Table 1. Table 1 Evaluation results of embodiments and comparative examples of a heat not burn cigarette coreSampleSensory evaluationEmbodiment 1A vapor amount is sufficient, an aroma amount is relatively sufficient, a tobacco aroma is natural, an original aroma of tobacco is outstanding, there is a nutty aroma and a roasted aroma, and a quantity of inhalation puffs is 12Embodiment 2A vapor amount is sufficient, an aroma amount is relatively sufficient, a tobacco aroma is natural, there is a cool sensation of menthol, and a quantity of inhalation puffs is 12Embodiment 3A vapor amount is still sufficient, an aroma amount is still sufficient, a tobacco aroma is natural, an original aroma of tobacco is outstanding, there is a nutty aroma, and a quantity of inhalation puffs is 10Comparative example 1A vapor amount is relatively insufficient, an aroma amount is relatively insufficient, a tobacco aroma is natural, an original aroma of tobacco is outstanding, there is a nutty aroma, and a quantity of inhalation puffs is 10Comparative example 2A vapor amount is relatively insufficient, an aroma amount is relatively insufficient, a tobacco aroma is natural, there is a cool sensation of menthol, and a quantity of inhalation puffs is 10

[0077] In Table 1, the results are compared based on the sensory evaluation: The vapor amount is sufficient > the vapor amount is still sufficient > the vapor amount is relatively insufficient.

[0078] The aroma amount is relatively sufficient > the aroma amount is still sufficient > the aroma amount is relatively insufficient.

[0079] A quantity of inhalation puffs is 12 > a quantity of inhalation puffs is 10.

[0080] Compared with comparative examples 1-2, the cigarette cores made of the products of Embodiments 1-3 have a relatively sufficient vapor amount and aroma amount. Specifically, in Embodiment 3, the glycerol is added in a plurality of times, and the cigarette core has a relatively sufficient vapor amount and aromas. Compared with Embodiment 3, in Embodiment 1, the length of the cut shreds is relatively short, so that curling is not easy to occur during a rolling process. After the rolling, the tobacco shreds are tightly adhered to each other. Therefore, the heat transfer efficiency is high during a heating process, helping release a fragrance substance. The vapor amount is more sufficient and more uniform, and more times of inhalation may be performed. Compared with Embodiment 2, in comparative example 2, the glycerol is not added in portions, an absorption effect of the glycerol is relatively poor. In the inhalation process, the vapor amount is relatively insufficient, the aroma amount is relatively insufficient, and a quantity of inhalation puffs is fewer. Compared with Embodiment 2, in comparative example 1, the glycerol is not added in portions, the absorption effect of the glycerol is relatively poor. In addition, the length of the tobacco shreds obtained by cutting into shreds in comparative example 1 is relatively long, which is not beneficial to rolling, heat transfer, and aroma release. Therefore, the cigarette core made of the product in comparative example 1 has a relatively poor sensory effect.

[0081] In the descriptions of the specification, descriptions of a reference term such as "an embodiment", "some embodiments", "some other embodiments", "some specific embodiments", or the like means that specific features, structures, materials, or characteristics described with reference to the embodiment are included in at least one embodiment of this application. In this specification, schematic descriptions of the foregoing terms are not necessarily directed at the same embodiment or example. Besides, the specific features, the structures, the materials or the characteristics that are described may be combined in proper manners in any one or more embodiments or examples. In addition, a person skilled in the art may integrate or combine different embodiments or examples described in the specification and features of the different embodiments or examples in a case without conflict. In addition, it should be noted that, in the specification, terms "first" and "second" are merely used for description, and cannot be understood as indicating or implying relative importance or implying a quantity of indicated technical features.

[0082] Although the embodiments of this application have been shown and described above, it may be understood that the above embodiments are exemplary and cannot be construed as a limitation on this application. A person of ordinary skill in the art may make changes, modifications, replacements, or variations to the above embodiments within the scope of this application.

Claims

1. A method for manufacturing tobacco shreds for a heat not burn cigarette, characterized by comprising the following steps: (1) loosening and conditioning a tobacco leaf, to obtain a tobacco flake; (2) spraying a first smoking agent onto the tobacco flake, wherein the first smoking agent comprises polybasic alcohol; (3) storing, at a room temperature, the tobacco flake onto which the first smoking agent is sprayed; (4) cutting the stored tobacco flake into shreds; (5) spraying a second smoking agent onto the tobacco shreds, wherein the second smoking agent comprises the polybasic alcohol; (6) baking the tobacco shreds obtained in step (5); (7) cooling the tobacco shreds to the room temperature, and spraying the tobacco shreds with flavor; and (8) storing the tobacco shreds sprayed with the flavor at the room temperature, to obtain tobacco shreds for a heat not burn cigarette.

2. The method of claim 1, characterized in that in step (7), if a total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 25% of an initial mass of the tobacco leaf, the tobacco shreds are cooled to the room temperature and sprayed with the flavor; and if the total mass of the first smoking agent and the second smoking agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaf, step (5) and step (6) are performed until the total mass of the first smoking agent and the second smoking agent in the tobacco shreds ranges from 15% to 25% of the initial mass of the tobacco leaf, and then the tobacco shreds are cooled to the room temperature and sprayed with the flavor.

3. The method of claim 2, characterized in that step (5) and step (6) are both performed twice or 3 times.

4. The method of any one of claims 1 to 3, characterized in that in step (1), a moisture content of the tobacco flake ranges from 18% to 26%.

5. The method of any one of claims 1 to 4, characterized in that in step (2), a mass of the first smoking agent ranges from 2% to 7% of the initial mass of the tobacco leaf; and / or in step (5), a mass of the second smoking agent ranges from 5% to 10% of the initial mass of the tobacco leaf.

6. The method of any one of claims 1 to 5, characterized in that in step (2), the method further comprises: spraying a feed liquid onto the tobacco flake; and / or in step (5), the method further comprises: spraying the feed liquid onto the tobacco shreds, wherein the feed liquid comprises at least one of tobacco extract, fruit extract, or sugar.

7. The method of claim 6, characterized in that in step (2), a mass of the feed liquid ranges from 1% to 5% of the initial mass of the tobacco leaf; and / or in step (5), the mass of the feed liquid ranges from 1% to 5% of the initial mass of the tobacco leaf.

8. The method of any one of claims 1 to 7, characterized in that in step (3), the tobacco flake is stored at the room temperature for 2h to 6h; and / or in step (8), the tobacco shreds are stored at the room temperature for 2h to 6h.

9. The method of any one of claims 1 to 8, characterized in that in step (4), the tobacco shreds with the length ranging from 4 mm to 10 mm are obtained through cutting.

10. The method of any one of claims 1 to 9, characterized in that in step (6), the tobacco shreds are baked until a moisture content thereof ranges from 8% to 10%.

11. The method of any one of claims 1 to 10, characterized in that in step (6), a temperature for baking the tobacco shreds ranges from 110°C to 125°C.

12. The method of any one of claims 1 to 11, characterized in that in step (7), the flavor comprises at least one of tobacco absolute, flower and fruit absolute, or menthol flavor; and / or a mass of the flavor ranges from 0.5% to 3% of the initial mass of the tobacco leaf.

13. The method of any one of claims 1 to 12, characterized in that the tobacco leaf comprises at least one of flue-baked tobacco or sun-baked tobacco.

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