Preparation method of tobacco shreds for heat-not-burn cigarettes

Abstract

The invention provides a preparation method of tobacco shreds for heat-not-burn cigarettes, which comprises the following steps: (1) loosening tobacco leaves and regaining moisture to obtain tobacco flakes; (2) spraying a first smoke agent to the tobacco flakes; (3) storing the tobacco flakes sprayed with the first smoke agent at room temperature; (4) shredding the tobacco flakes; (5) spraying a second smoke agent to the tobacco shreds; (6) baking the tobacco shreds; (7) cooling the tobacco shreds to room temperature, and spraying spices; and (8) storing the tobacco shreds at room temperature to obtain the tobacco shreds for the heat-not-burn cigarettes. The smoking agent is added in batches, the absorption efficiency is high, the distribution of the smoking agent in the tobacco shreds is more uniform, and therefore release of tobacco fragrance is facilitated, and the experience effect of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of tobacco technology, and in particular to a method for preparing shredded tobacco for heat-not-burn cigarettes. Background Art

[0002] Heat-not-burn cigarette products are new tobacco products that use specific electronic devices to heat specific core materials (250℃-350℃) without burning to release flavor and aroma components. Due to the special heating method of heat-not-burn cigarette products, traditional cigarette tobacco cannot be used directly as its core material, and the existing heat-not-burn cigarette core materials are mostly prepared by thick pulp method, roller pressing method, papermaking method, dry reconstituted tobacco leaves or particles, stem shreds, stem particles, etc., and their processes are mostly made by reconstructing tobacco leaf raw materials. Although they have strong plasticity, high content of loaded atomizers (smoke agents), and high degree of homogenization, their processing will cause the loss of natural aroma components of tobacco, and the degree of reduction of tobacco flavor after heating is low. In addition, there are also some technical solutions that use traditional tobacco shreds to directly add smoke agents as heat-not-burn core materials, but they are usually prone to low absorption efficiency of smoke agents, poor uniformity, and easy curling of tobacco shreds during rolling, thereby affecting the release of aroma substances in heat-not-burn cigarette products, resulting in low reduction of tobacco flavor and poor consistency.

[0003] Therefore, the current method for preparing shredded tobacco for heat-not-burn cigarettes still needs to be improved. Summary of the invention

[0004] The present application aims to alleviate or solve at least one of the above-mentioned problems to at least some extent.

[0005] In one aspect of the present application, the present application proposes a method for preparing tobacco shreds for heat-not-burn cigarettes. In some embodiments of the present application, the method for preparing tobacco shreds for heat-not-burn cigarettes comprises the following steps: (1) loosening and rehydrating tobacco leaves to obtain tobacco sheets; (2) spraying a first smoke agent onto the tobacco sheets, wherein the first smoke agent comprises a polyol; (3) storing the tobacco sheets sprayed with the first smoke agent at room temperature; (4) shredding the tobacco sheets after storage; (5) spraying a second smoke agent onto the tobacco shreds, wherein the second smoke agent comprises a polyol; (6) baking the tobacco shreds obtained in step (5); (7) cooling the tobacco shreds to room temperature and spraying spices; (8) storing the tobacco shreds sprayed with spices at room temperature to obtain tobacco shreds for heat-not-burn cigarettes. Therefore, the addition of smoke agents in batches in the present application can improve the absorption efficiency of tobacco sheets or tobacco shreds to the smoke agents, and the distribution of the smoke agents in the tobacco shreds is more uniform, which is conducive to the release of tobacco aroma and improves the user experience.

[0006] In some embodiments of the present application, in step (7), if the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, the tobacco shreds are cooled to room temperature and sprayed with flavorings; if the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaves, steps (5) and (6) are repeated until the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, the tobacco shreds are then cooled to room temperature and sprayed with flavorings.

[0007] In some embodiments of the present application, in the process of preparing tobacco shreds for heat-not-burn cigarettes, steps (5) and (6) are performed 2 or 3 times, thereby further improving the absorption efficiency of tobacco shreds for the smoking agent, thereby further improving the distribution uniformity of the smoking agent.

[0008] In some embodiments of the present application, in step (1), the moisture content of the tobacco sheet is 18%-26%. The moisture content of the tobacco sheet within the above range is conducive to the loosening of the tobacco leaves and can also improve the absorption effect of the tobacco sheet on the smoke-generating agent and liquid.

[0009] In some embodiments of the present application, in step (2), the mass of the first smoke agent is 2%-7% of the initial mass of the tobacco leaf; and / or, in step (5), the mass of the second smoke agent is 5%-10% of the initial mass of the tobacco leaf. The amount of the first smoke agent added is small, and the tobacco leaf can absorb the first smoke agent more fully during the subsequent storage process, and the first smoke agent can also play a role in making the tobacco leaf flexible to a certain extent; when the amount of the second smoke agent added is within the above range, the tobacco leaf absorbs the second smoke agent more fully, which is beneficial to improving the quality of the tobacco leaf.

[0010] In some embodiments of the present application, step (2) further includes spraying a feed liquid onto the tobacco sheet; and / or step (5) further includes spraying a feed liquid onto the tobacco shreds; the feed liquid includes at least one of tobacco extract, fruit extract and sugar. Adding the feed liquid is beneficial to improving the reduction degree of the original tobacco aroma.

[0011] In some embodiments of the present application, in step (2), the mass of the feed liquid is 1%-5% of the initial mass of the tobacco leaves; and / or, in step (5), the mass of the feed liquid is 1%-5% of the initial mass of the tobacco leaves. Thus, adding a certain amount of feed liquid is conducive to improving the reduction degree of the original aroma of tobacco.

[0012] In some embodiments of the present application, in step (3), the tobacco sheets are stored at room temperature for 2 h to 6 h; and / or, in step (8), the tobacco shreds are stored at room temperature for 2 h to 6 h.

[0013] In some embodiments of the present application, in step (4), the tobacco is cut into shreds with a length of 4 mm to 10 mm. The length of the cut tobacco is 4 mm to 10 mm, which can significantly reduce the probability of tobacco curling during the rolling process.

[0014] In some embodiments of the present application, in step (6), the tobacco is baked until the moisture content in the tobacco is 8%-10%.

[0015] In some embodiments of the present application, in step (6), the temperature of baking the shredded tobacco is 110°C-125°C.

[0016] In some embodiments of the present application, in step (7), the flavor includes at least one of tobacco absolute oil, flower and fruit absolute oil, and mint flavor; and / or the mass of the flavor is 0.5%-3% of the initial mass of the tobacco leaves.

[0017] In some embodiments of the present application, the tobacco leaves include at least one of flue-cured tobacco and air-dried tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 The flowchart of preparing tobacco shreds according to one embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below. The embodiments described below are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0021] This application is based on the inventor's discovery and understanding of the following facts and problems:

[0022] The heat-not-burn cigarette core material is prepared by the regeneration of tobacco leaf raw materials. Although it has strong plasticity, high content of loaded atomizer (smoke agent), and high degree of homogenization, its processing process will cause the loss of natural tobacco aroma components, and the reduction degree of tobacco flavor after heating is low. The traditional tobacco shreds are directly added with smoke agents for use as heat-not-burn core materials. The process is generally to add atomizers once after cutting, resulting in low atomizer absorption efficiency and poor atomizer distribution uniformity. In addition, the tobacco shreds are too long and easy to curl during the cigarette core rolling process, resulting in large gaps between tobacco shreds and low heat transfer efficiency, thereby affecting the release of flavor substances in heat-not-burn cigarette products, causing low reduction degree of tobacco flavor and poor consistency. The inventor found that the absorption efficiency of the smoke agent can be improved by adding a small amount of smoke agent multiple times, and the distribution uniformity of the smoke agent can be improved, thereby improving the overall uniformity of the smoke volume during the smoking process and increasing the number of puffs; in addition, when cutting, the length of the cut tobacco shreds is 4mm-10mm, which can significantly reduce the probability of tobacco curling during the rolling process.

[0023] In view of this, in one aspect of the present application, the present application proposes a method for preparing tobacco shreds for heat-not-burn cigarettes. Figure 1 The method for preparing shredded tobacco for heat-not-burn cigarettes may include the following steps:

[0024] (1) Loosen the tobacco leaves and rehumidify them to obtain tobacco flakes.

[0025] In this step, the tobacco leaves are loosened and rehumidified to obtain tobacco sheets, wherein the moisture content of the tobacco sheets can be 18%-26%. In some embodiments of the present application, the moisture content of the tobacco sheets can be 18%, 20%, 21%, 22%, 24%, 26%, etc. The moisture content of the tobacco sheets within the above range is more conducive to loosening the tobacco leaves and can improve the absorption performance of the tobacco sheets to the feed liquid.

[0026] It should be noted that "tobacco leaves" refer to the re-roasted tobacco leaves, which are usually packed together in large boxes, stacked and placed tightly, one cake at a time. The "tobacco leaves" are loosened and moistened, and then they become "tobacco flakes".

[0027] In some embodiments of the present application, the tobacco leaf may include at least one of flue-cured tobacco and air-cured tobacco. In some specific embodiments of the present application, the tobacco leaf may be flue-cured tobacco. In other specific embodiments of the present application, the tobacco leaf may be air-cured tobacco (including at least one of burley tobacco, oriental tobacco, and cigar tobacco).

[0028] (2) Spraying the first smoke agent onto the tobacco sheet.

[0029] In this step, the first smoke agent is sprayed onto the tobacco sheet, wherein the first smoke agent may include a polyol. Adding the first smoke agent can increase the processing resistance of the tobacco sheet and reduce breakage, and can reduce the addition ratio of the second smoke agent in the subsequent step (5), so that the second smoke agent is more easily absorbed by the tobacco.

[0030] In some embodiments of the present application, the polyol in the first smoking agent may include at least one of propylene glycol and glycerol. The above polyols all have good atomization performance and can bring out the aroma of tobacco during the smoking process.

[0031] In some embodiments of the present application, in step (2), the mass of the first smoke agent can be 2%-7% of the initial mass of the tobacco leaves. For example, the mass of the first smoke agent can be 2%, 4%, 5%, 6%, 7%, etc. of the initial mass of the tobacco leaves. When the mass of the first smoke agent is within the above range, the tobacco leaves can absorb the first smoke agent more fully during the subsequent storage process. Moreover, the first smoke agent of the above mass can play the role of flexible tobacco leaves and is not easy to clump when cut into shreds.

[0032] In some embodiments of the present application, in step (2), the mass of the first smoke agent can be 3%-5% of the initial mass of the tobacco leaves. For example, the mass of the first smoke agent can be 3%, 3.5%, 4%, 4.5%, 5%, etc. of the initial mass of the tobacco leaves. The first smoke agent of the above mass can also play the role of making the tobacco leaves flexible and less likely to clump when cut into shreds.

[0033] In some embodiments of the present application, in step (2), the first smoke-generating agent and the liquid feed may be sprayed onto the tobacco sheet. In some embodiments of the present application, the liquid feed may include at least one of tobacco extract, fruit extract, and sugar. Thus, adding the liquid feed may highlight the tobacco aroma characteristics, thereby further enhancing the user experience.

[0034] In some embodiments of the present application, in step (2), the mass of the liquid sprayed into the tobacco leaf can be 1%-5% of the initial mass of the tobacco leaf. For example, the mass of the liquid can be 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5%, etc. of the initial mass of the tobacco leaf. The above mass of liquid can improve the taste of tobacco to a certain extent.

[0035] (3) The tobacco sheet sprayed with the first smoke agent is stored at room temperature.

[0036] In some embodiments of the present application, the tobacco sheet after being sprayed with the first smoke agent is stored at room temperature to allow the tobacco sheet to absorb the first smoke agent.

[0037] In some embodiments of the present application, the tobacco sheet sprayed with the first smoke agent may be stored at room temperature for 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, etc., thereby promoting the absorption of the first smoke agent.

[0038] In some embodiments of the present application, the tobacco slices in step (3) can be stored at room temperature for 4h-6h, for example, 4h, 4.5h, 5h, 5.5h, 6h, etc., thereby further promoting the absorption of the first smoking agent, thereby helping to further improve the quality of the tobacco.

[0039] In some embodiments of the present application, in step (2), the first smoke agent and the liquid are sprayed onto the tobacco sheet, and in step (3), the tobacco sheet sprayed with the first smoke agent and the liquid is stored at room temperature for 2h-6h, which can promote the absorption of the first smoke agent and the liquid.

[0040] Herein, "room temperature" may be 15°C-30°C, for example, "room temperature" may be 15°C, 18°C, 20°C, 23°C, 25°C, 27°C, 30°C, etc.

[0041] (4) Cutting the tobacco slices after storage treatment into shreds.

[0042] In some embodiments of the present application, the tobacco sheets after storage treatment are cut into shreds to obtain shredded tobacco with a length of 4 mm to 10 mm, for example, the length of the shredded tobacco can be 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, etc. The length of the shredded tobacco within the above range is conducive to rolling, and it is not easy to curl during the rolling process. After rolling, the shredded tobacco is tightly attached, the heat transfer efficiency is high during the heating process, and it is conducive to the release of flavor substances.

[0043] In some embodiments of the present application, in step (4), the length of the tobacco shreds can be 6mm-8mm, for example, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, etc. Tobacco shreds of the above lengths are more conducive to rolling and are less likely to curl during the rolling process, which is beneficial to further improve the heat transfer efficiency during the heating process and promote the release of flavor substances.

[0044] The width of the tobacco shreds is not particularly limited in the present application, and those skilled in the art can select and set the width of the tobacco shreds according to actual needs. In some embodiments of the present application, the width of the tobacco shreds can be 0.8 mm-1.2 mm, for example, the width of the tobacco shreds can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.1 mm, 1.2 mm, etc.

[0045] (5) Spraying a second smoke generating agent onto the tobacco.

[0046] After the tobacco is cut, a second smoking agent is sprayed onto the tobacco, wherein the second smoking agent may include a polyol. In some embodiments of the present application, the polyol in the second smoking agent may include at least one of propylene glycol and glycerol.

[0047] In some embodiments of the present application, the second smoke agent may be the same as the first smoke agent, that is, the second smoke agent and the first smoke agent have the same composition and ratio. In other embodiments of the present application, the second smoke agent may be different from the first smoke agent, that is, the composition and / or ratio of the second smoke agent are different from the first smoke agent.

[0048] In some embodiments of the present application, in step (5), the mass of the second smoke agent can be 5%-10% of the initial mass of the tobacco leaves. For example, the mass of the second smoke agent can be 5%, 6%, 7%, 8%, 9%, 10%, etc. of the initial mass of the tobacco leaves. The amount of the second smoke agent added is within the above range, which is convenient for the tobacco shreds to fully absorb the second smoke agent. The inventors have found that if the single amount of the second smoke agent added is too much, it is difficult for the tobacco shreds to fully absorb the second smoke agent, resulting in the second smoke agent only adhering to the surface of the tobacco shreds. After rolling, the smoke agent is likely to seep out, and the seeped smoke agent will contaminate the cigarette paper.

[0049] In some embodiments of the present application, in step (5), the mass of the second smoke agent can be 6%-8% of the initial mass of the tobacco leaves. For example, the mass of the second smoke agent can be 6%, 6.5%, 7%, 7.5%, 8% of the initial mass of the tobacco leaves, etc. When the amount of the second smoke agent added is within the above range, the tobacco shreds can more fully absorb the second smoke agent, and the smoke agent is not easy to seep out during the subsequent rolling process.

[0050] In some embodiments of the present application, in step (5), a second smoking agent and a liquid feed may be sprayed onto the tobacco shreds, wherein the liquid feed includes at least one of a tobacco extract, a fruit extract, and a sugar. Adding the liquid feed may highlight the tobacco aroma characteristics, thereby further enhancing the user experience.

[0051] In some embodiments of the present application, in step (5), the mass of the liquid sprayed onto the tobacco shreds may be 1%-5% of the initial mass of the tobacco leaves. For example, the mass of the liquid may be 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5%, etc. of the initial mass of the tobacco leaves. The liquid of the above mass can improve the taste of the tobacco to a certain extent.

[0052] (6) Baking the shredded tobacco obtained in step (5).

[0053] In some embodiments of the present application, after spraying the second smoke agent, the tobacco can be baked to a moisture content of 8%-10%. In some embodiments of the present application, after baking, the moisture content of the tobacco can be 8%, 8.5%, 9%, 9.5%, 10%, etc.

[0054] In some embodiments of the present application, in step (6), the temperature for baking the tobacco can be 110°C-125°C. For example, the temperature for baking the tobacco can be 110°C, 112°C, 114°C, 120°C, 125°C, etc. The baking temperature is set within the above range, which can remove part of the moisture in the tobacco in a shorter time and will not cause obvious loss of substances such as smoke-generating agents added in the tobacco.

[0055] In some embodiments of the present application, in step (6), the temperature for baking the tobacco can be 115°C-125°C. For example, the temperature for baking the tobacco can be 115°C, 116°C, 118°C, 120°C, 122°C, 125°C, etc., thereby quickly removing part of the moisture in the tobacco, shortening the process time, and the quality of substances such as smoke agents will not be significantly reduced.

[0056] (7) If the total mass of the smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, cool the tobacco shreds to room temperature and spray them with flavorings; if the total mass of the smoke agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaves, repeat steps (5) and (6) until the total mass of the smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, then cool the tobacco shreds to room temperature and spray them with flavorings.

[0057] In some embodiments of the present application, after step (5) and step (6) are performed once respectively, the total mass of the first smoke agent and the second smoke agent in the tobacco is 15%-25% of the initial mass of the tobacco leaves. For example, the total mass of the first smoke agent and the second smoke agent in the tobacco is 15%, 18%, 20%, 22%, 25%, etc. of the initial mass of the tobacco leaves. The tobacco leaves can be cooled to room temperature and flavorings can be sprayed on the tobacco leaves.

[0058] In other embodiments of the present application, after step (5) and step (6) are performed once respectively, if the total mass of the first smoke agent and the second smoke agent in the tobacco is less than 15% of the initial mass of the tobacco leaves, steps (5) and (6) are repeated until the total mass of the first smoke agent and the second smoke agent in the tobacco leaves is 15%-25% of the initial mass of the tobacco leaves, and the tobacco leaves are then cooled to room temperature and sprayed with flavorings.

[0059] In some specific embodiments of the present application, step (5) and step (6) are both performed twice, that is, after step (5) and step (6) are performed once respectively, the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaves, and after step (5) and (6) are performed twice, the total mass of the first smoke agent and the second smoke agent in the tobacco shreds reaches 15%-25% of the initial mass of the tobacco leaves.

[0060] In some specific embodiments of the present application, step (5) and step (6) are both performed three times, that is, after step (5) and step (6) are performed twice, the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is still less than 15% of the initial mass of the tobacco leaves, and after step (5) and step 6 are performed three times, the total mass of the first smoke agent and the second smoke agent in the tobacco shreds reaches 15%-25% of the initial mass of the tobacco leaves.

[0061] In some embodiments of the present application, in step (7), when the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is 15%-18% of the initial mass of the tobacco leaves, flavorings are sprayed. For example, when the total mass of the smoke agents in the tobacco shreds is 15%, 15.5%, 16%, 16.5%, 17%, 17.5% or 18% of the initial mass of the tobacco leaves, flavorings are sprayed.

[0062] In some embodiments of the present application, the spices may include at least one of tobacco absolute, flower and fruit absolute, mint spices, etc. Adding spices may improve the reduction degree of the original fragrance of tobacco or increase the characteristic flavor aroma, thereby improving the taste of tobacco. In some specific embodiments of the present application, the spices may be tobacco absolute, flower and fruit absolute, or mint spices, etc. In other specific embodiments of the present application, the spices may also include two or more of tobacco absolute, flower and fruit absolute, mint spices, etc.

[0063] In some embodiments of the present application, the mass of the flavor can be 0.5%-3% of the initial mass of the tobacco leaves. For example, the mass of the flavor can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, etc. of the initial mass of the tobacco leaves.

[0064] In some embodiments of the present application, the mass of the spices can be 0.5%-1% of the initial mass of the tobacco leaves. For example, the mass of the spices can be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1% and the like of the initial mass of the tobacco leaves. The amount of spices added within the above range can, to a certain extent, improve the degree of restoration of the original aroma of tobacco or increase the characteristic flavor aroma.

[0065] (8) The tobacco sprayed with flavorings is stored at room temperature.

[0066] In some embodiments of the present application, after the flavor is sprayed, the shredded tobacco can be stored at room temperature for 2h-6h to obtain shredded tobacco for heat-not-burn cigarettes. In some embodiments of the present application, after the flavor is sprayed, the shredded tobacco is stored at room temperature for 2h, 3h, 4h, 5h, 6h, etc., so that the shredded tobacco can fully absorb the flavor, thereby facilitating the release of flavor during the heating process.

[0067] In some embodiments of the present application, in step (8), the tobacco can be stored at room temperature for 4h-6h. For example, the tobacco can be stored at room temperature for 4h, 4.5h, 5h, 5.5h, 6h, etc., so that the added flavoring can be fully absorbed by the tobacco, and the tobacco can release its flavor more easily during the heating process.

[0068] In general, the method proposed in the present application is used to prepare tobacco shreds for heat-not-burn cigarettes, and the smoke agent is added in batches, the number of additions is greater than or equal to 2 times, the tobacco leaves or tobacco shreds have a high absorption efficiency of the smoke agent, and the smoke agent is evenly distributed; further, the length of the tobacco shreds obtained by shredding is in the range of 4mm-10mm, the tobacco shreds are not easy to curl during the rolling process, the tobacco shreds are tightly attached, and the heat transfer efficiency of the tobacco shreds after rolling is high, which is conducive to the release of flavor substances. The tobacco shreds for heat-not-burn cigarettes prepared by the method proposed in the present application form a heat-not-burn cigarette core after rolling, the original tobacco flavor is restored to a high degree, and the sensory quality is significantly higher than that of reconstituted tobacco leaves and granular cigarette cores. In addition, the method proposed in the present application can directly use the existing production lines of cigarette companies to prepare tobacco shreds for heat-not-burn cigarettes, and only the shredder needs to be modified, which can reduce production costs.

[0069] The present application will be described below by specific examples, and it will be appreciated by those skilled in the art that the following specific examples are only for illustrative purposes, and do not limit the scope of the present application in any way. In addition, in the following examples, unless otherwise specified, the materials and equipment used are all commercially available. If in the following examples, specific processing conditions and processing methods are not clearly described, then conditions and methods known in the art can be used to process.

[0070] Example 1

[0071] (1) loosening and rehumidifying the tobacco leaves to obtain tobacco sheets with a moisture content of 20%;

[0072] (2) spraying glycerol and tobacco extract onto the tobacco leaves, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves, and the mass of the tobacco extract is 5% of the initial mass of the tobacco leaves;

[0073] (3) Store the leaves at room temperature for 6 h;

[0074] (4) cutting the tobacco leaves after storage into shreds of a fixed length to obtain shredded tobacco with a width of 1 mm and a length of 6 mm;

[0075] (5) spraying glycerol onto the tobacco, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves;

[0076] (6) baking the tobacco at 115°C until the moisture content of the tobacco is 8%;

[0077] (7) spraying glycerol onto the shredded tobacco again, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves, and baking the shredded tobacco at 115° C. until the moisture content of the shredded tobacco is 8%; cooling the shredded tobacco to room temperature, and spraying tobacco clean oil onto the shredded tobacco, wherein the mass of the tobacco clean oil is 0.5% of the initial mass of the tobacco leaves;

[0078] (8) Store the silk at room temperature for 6 hours and then coil it.

[0079] Example 2

[0080] (1) loosening and rehumidifying the tobacco leaves to obtain tobacco sheets with a moisture content of 22%;

[0081] (2) spraying glycerol and tobacco extract onto the tobacco leaves, wherein the mass of the glycerol is 4% of the initial mass of the tobacco leaves, and the mass of the tobacco extract is 3% of the initial mass of the tobacco leaves;

[0082] (3) Store the leaves at room temperature for 4 h;

[0083] (4) cutting the tobacco leaves after storage into shreds of a fixed length to obtain shredded tobacco with a width of 1 mm and a length of 8 mm;

[0084] (5) spraying glycerol onto the tobacco, wherein the mass of the glycerol is 6% of the initial mass of the tobacco leaves;

[0085] (6) baking the tobacco at 120° C. until the moisture content of the tobacco is 8%;

[0086] (7) spraying glycerol onto the shredded tobacco again, wherein the mass of the glycerol is 8% of the initial mass of the tobacco leaves, and baking the shredded tobacco at 125° C. until the moisture content of the shredded tobacco is 8%; cooling the shredded tobacco to room temperature, and spraying tobacco clean oil and mint essence onto the shredded tobacco, wherein the mass of the tobacco clean oil is 0.5% of the initial mass of the tobacco leaves, and the mass of the mint essence is 0.5% of the initial mass of the tobacco leaves;

[0087] (8) Store the silk at room temperature for 5 hours and then coil it.

[0088] Example 3

[0089] (1) loosening and rehumidifying the tobacco leaves to obtain tobacco sheets with a moisture content of 20%;

[0090] (2) spraying glycerol and tobacco extract onto the tobacco leaves, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves, and the mass of the tobacco extract is 5% of the initial mass of the tobacco leaves;

[0091] (3) Store the leaves at room temperature for 6 h;

[0092] (4) cutting the tobacco leaves after storage into shreds of a fixed length to obtain shredded tobacco with a width of 1 mm and a length of 20 mm;

[0093] (5) spraying glycerol onto the tobacco, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves;

[0094] (6) baking the tobacco at 115°C until the moisture content of the tobacco is 8%;

[0095] (7) spraying glycerol onto the shredded tobacco again, wherein the mass of the glycerol is 5% of the initial mass of the tobacco leaves, and baking the shredded tobacco at 115° C. until the moisture content of the shredded tobacco is 8%; cooling the shredded tobacco to room temperature, and spraying tobacco clean oil onto the shredded tobacco, wherein the mass of the tobacco clean oil is 0.5% of the initial mass of the tobacco leaves;

[0096] (8) Store the silk at room temperature for 6 hours and then coil it.

[0097] Comparative Example 1

[0098] (1) loosening and rehumidifying the tobacco leaves to obtain tobacco sheets with a moisture content of 22%;

[0099] (2) spraying tobacco extract onto the tobacco leaves, wherein the mass of the tobacco extract is 3% of the initial mass of the tobacco leaves;

[0100] (3) Store the leaves at room temperature for 4 h;

[0101] (4) cutting the tobacco leaves after storage into shreds of a fixed length to obtain shredded tobacco with a width of 1 mm and a length of 20 mm;

[0102] (5) spraying glycerol onto the shredded tobacco, wherein the mass of the glycerol is 18% of the initial mass of the tobacco leaves, and baking the shredded tobacco at 120° C. until the moisture content of the shredded tobacco is 8%; cooling the shredded tobacco to room temperature, and spraying tobacco clean oil and mint essence onto the shredded tobacco, wherein the mass of the tobacco clean oil is 0.5% of the initial mass of the tobacco leaves, and the mass of the mint essence is 0.5% of the initial mass of the tobacco leaves;

[0103] (6) Store the silk at room temperature for 5 hours and then coil it.

[0104] Among them, the difference between Comparative Example 1 and Example 2 is that in Comparative Example 1, the length of the tobacco shreds after cutting is longer, and glycerol is not added in batches.

[0105] Comparative Example 2

[0106] (1) loosening and rehumidifying the tobacco leaves to obtain tobacco sheets with a moisture content of 22%;

[0107] (2) spraying glycerol and tobacco extract onto the tobacco leaves, wherein the mass of the glycerol is 18% of the initial mass of the tobacco leaves, and the mass of the tobacco extract is 3% of the initial mass of the tobacco leaves;

[0108] (3) Store the leaves at room temperature for 4 h;

[0109] (4) cutting the tobacco leaves after storage into shreds of a fixed length to obtain shredded tobacco with a width of 1 mm and a length of 8 mm;

[0110] (5) baking the tobacco at 125° C. until the moisture content of the tobacco is 8%; cooling the tobacco to room temperature, and spraying tobacco clean oil and mint essence onto the tobacco, wherein the mass of the tobacco clean oil is 0.5% of the initial mass of the tobacco leaves, and the mass of the mint essence is 0.5% of the initial mass of the tobacco leaves;

[0111] (6) Store the silk at room temperature for 5 hours and then coil it.

[0112] Among them, the difference between Comparative Example 2 and Example 2 is that in Comparative Example 2, propylene glycol is not added in batches.

[0113] The products prepared in Example 1, Example 2, Example 3 and each comparative example were made into heat-not-burn cigarette cores, respectively, and balanced for 24 hours in an environment with a temperature of 22°C-25°C and a relative humidity of 30%-40%. According to the sensory evaluation standard for tobacco products, a smoking evaluation panel consisting of 9 smoking evaluation experts was organized to conduct a sensory evaluation on the heat-not-burn cigarette cores of each embodiment and comparative example, and the evaluation results are shown in Table 1.

[0114] Table 1 Evaluation results of heat-not-burn cigarette cores of various embodiments and comparative examples

[0115]

[0116]

[0117] In Table 1, the sensory evaluation is compared:

[0118] Sufficient smoke > Sufficient smoke > Insufficient smoke;

[0119] The aroma is more abundant > the aroma is still sufficient > the aroma is less abundant;

[0120] The number of suction ports is 12 puffs > the number of suction ports is 10 puffs.

[0121] Compared with Comparative Examples 1-2, the cigarette core made of the products in Examples 1-3 has a sufficient amount of smoke and aroma. Specifically, in Example 3, glycerol is added in multiple times, and the cigarette core has a sufficient amount of smoke and aroma. Compared with Example 3, the length of the cut shreds in Example 1 is shorter, and it is not easy to curl during the rolling process. After rolling, the tobacco shreds are tightly attached, and the heat transfer efficiency is high during the heating process, which is more conducive to the release of flavor substances. The amount of smoke is more sufficient and more uniform, and more puffs can be drawn. Compared with Example 2, the glycerol in Comparative Example 2 is not added in multiple times, and the glycerol absorption effect is poor. During the puffing process, the amount of smoke is insufficient, the amount of aroma is insufficient, and the number of puffs is small. Compared with Example 2, the glycerol in Comparative Example 1 is not added in multiple times, and the glycerol absorption effect is poor. In addition, the length of the tobacco shreds obtained by cutting in Comparative Example 1 is longer, which is not conducive to rolling, heat transfer and aroma release. Therefore, the sensory effect of the cigarette cigarette core made of the product in Comparative Example 1 is poor.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "other embodiments", "some specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. In addition, it should be noted that in this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0123] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for preparing shredded tobacco for heat-not-burn cigarettes, characterized in that: The following steps are involved: (1) loosening and rehumidifying the tobacco leaves to obtain tobacco flakes; (2) spraying a first smoke generating agent onto the tobacco sheet, wherein the first smoke generating agent comprises a polyol; (3) storing the tobacco sheet after spraying the first smoke agent at room temperature; (4) cutting the tobacco sheets after storage treatment into shreds; (5) spraying a second smoking agent onto the shredded tobacco, wherein the second smoking agent comprises a polyol; (6) baking the shredded tobacco obtained in step (5); (7) Cooling the tobacco to room temperature and spraying with spices; (8) The tobacco shreds sprayed with flavoring agents are stored at room temperature to obtain tobacco shreds for heat-not-burn cigarettes.

2. The method according to claim 1, characterized in that In step (7), if the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, the tobacco shreds are cooled to room temperature and sprayed with flavorings; if the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is less than 15% of the initial mass of the tobacco leaves, steps (5) and (6) are repeated until the total mass of the first smoke agent and the second smoke agent in the tobacco shreds is 15%-25% of the initial mass of the tobacco leaves, and the tobacco shreds are then cooled to room temperature and sprayed with flavorings.

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

4. The method according to claim 1, characterized in that: In step (1), the moisture content of the tobacco sheet is 18%-26%.

5. The method according to claim 1, characterized in that In step (2), the mass of the first smoking agent is 2%-7% of the initial mass of the tobacco leaves; And / or, in step (5), the mass of the second smoke-generating agent is 5%-10% of the initial mass of the tobacco leaf.

6. The method according to claim 1, characterized in that Step (2) further includes spraying a feed liquid onto the tobacco sheet; And / or, step (5) further comprises spraying a feed liquid onto the shredded tobacco; The slurry comprises at least one of tobacco extract, fruit extract and sugar.

7. The method according to claim 6, characterized in that In step (2), the mass of the slurry is 1%-5% of the initial mass of the tobacco leaves; And / or, in step (5), the mass of the slurry is 1%-5% of the initial mass of the tobacco leaves.

8. The method according to claim 1, characterized in that In step (3), the tobacco slices are stored at room temperature for 2 h to 6 h; And / or, in step (8), the tobacco is stored at room temperature for 2 h to 6 h.

9. The method according to claim 1, characterized in that: In step (4), the tobacco is cut into shreds having a length of 4 mm to 10 mm.

10. The method according to claim 1, characterized in that In step (6), the tobacco is baked until the moisture content in the tobacco is 8%-10%.

11. The method according to claim 1, characterized in that: In step (6), the temperature of baking the tobacco shreds is 110°C-125°C.

12. The method according to claim 1, characterized in that In step (7), the flavoring agent includes at least one of tobacco absolute oil, flower and fruit absolute oil, and mint flavoring agent; And / or, the mass of the flavor is 0.5%-3% of the initial mass of the tobacco leaves.

13. The method according to any one of claims 1 to 12, characterized in that The tobacco leaves include at least one of flue-cured tobacco and air-dried tobacco.

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