A reconstituted tobacco leaf and a manufacturing process for reconstituted tobacco leaf.

Abstract

This invention discloses a reconstituted tobacco leaf and its manufacturing process. The reconstituted tobacco leaf comprises 0-1% by weight of exogenous fibers and tobacco substances, wherein the tobacco substances are tobacco particles, and the sum of the number of particles with a diameter less than or equal to 50 μm is not less than 85% of the total number of particles. The reconstituted tobacco leaf of this invention, by controlling the diameter of the tobacco particles, eliminates the need for adding large amounts of exogenous fibers, and even without exogenous fibers, can maintain the tensile strength of the reconstituted tobacco leaf, possessing strong processing resistance. Furthermore, it does not produce an unpleasant odor similar to burning paper when smoked, exhibiting excellent sensory quality.

Description

Technical Field

[0001] This invention relates to the tobacco industry, and in particular to a heated non-combustible reconstituted tobacco leaf and a manufacturing process for the reconstituted tobacco leaf. Background Technology

[0002] Heated tobacco products, also known as heated tobacco products, maintain a relatively low temperature in the tobacco portion during inhalation, heating the tobacco without burning it, thus significantly reducing tar production. Especially for electrically heated tobacco products, the temperature control is more precise, effectively preventing the tobacco from overheating and thus reducing the release of harmful substances.

[0003] Heated tobacco products are typically made from reconstituted tobacco. Currently, reconstituted tobacco is mainly produced by papermaking, dry processing, slurry processing, and roll pressing. It is generally made from low-grade tobacco fragments or stems, resulting in a weak aroma of tobacco. In addition, a large amount of exogenous fiber is added, leading to noticeable woody and other off-flavors in reconstituted tobacco, which affects its sensory quality. Summary of the Invention

[0004] The purpose of this invention is to provide a reconstituted tobacco leaf to solve the above-mentioned problems.

[0005] The present invention discloses a reconstituted tobacco leaf comprising 0-1% by weight of exogenous fiber and tobacco material, wherein the tobacco material is tobacco particles and the sum of the number of tobacco particles with a diameter of less than or equal to 50 μm is not less than 85% of the total number of tobacco particles.

[0006] In traditional reconstituted tobacco leaves used for heat-not-burning processes, tobacco substances are generally processed into particles of 150 μm or larger. In the reconstituted tobacco leaves of this invention, over 85% of the tobacco particles have a diameter of less than 50 μm. Meeting this condition results in the formation of ultrafine tobacco powder. This ultrafine powder not only effectively improves the uniformity of chemical components within the powder but also plays a significant role in enhancing the tensile strength and sensory appeal of the reconstituted tobacco leaves.

[0007] The exogenous fibers in this invention refer to long or short fibers commonly used in the reconstituted tobacco industry, which are non-tobacco-derived fibers with a length of 100 μm or more. Fibers in reconstituted tobacco generally serve to form a paper base or increase the tensile strength of the reconstituted tobacco. For example, in papermaking and dry-process reconstituted tobacco, exogenous fibers are used to assist in forming paper-like sheets or skeletons, upon which tobacco-derived substances are then coated or sprayed. In roll-pressing or slurry-process reconstituted tobacco, exogenous fibers are also dispersed in tobacco substances, and after extrusion or casting, reconstituted tobacco sheets are formed. Exogenous fibers include, but are not limited to, wood fibers and hemp fibers. The addition of wood or hemp fibers helps improve the tensile strength of reconstituted tobacco, but when heated, smokers will experience unpleasant woody or other off-flavors, affecting sensory quality. Under high-temperature conditions, fibers can decompose to generate water, thus affecting the smoking effect of reconstituted tobacco.

[0008] In addition, the increase in exogenous fiber content will exacerbate the "sheet running" phenomenon in the subsequent tobacco processing of reconstituted tobacco. That is, when preparing reconstituted tobacco shreds of a fixed width, the fiber bonding effect causes the sheets to shift between each other when subjected to shear force, resulting in an increase in width.

[0009] The reconstituted tobacco leaf of the present invention, by controlling the diameter of tobacco particles, does not require the addition of a large amount of exogenous fibers, and can even ensure the tensile strength of the reconstituted tobacco leaf without the presence of exogenous fibers. It has strong processing resistance and does not produce an unpleasant smell similar to burning paper when smoked, thus having good sensory quality.

[0010] The smaller the particles in reconstituted tobacco, the smaller the gaps between them. Irregularly shaped powder particles are more easily interlocked, partially replacing the binding effect of adhesives and exogenous fibers. This ensures the tensile strength of the reconstituted tobacco and reduces breakage during processing. Therefore, the amount of exogenous fibers used in the reconstituted tobacco of this invention can be reduced to 1% or less.

[0011] On the other hand, the tobacco particles of this invention ensure that at least 85% are 50 μm or smaller, which significantly increases the contact area between the water-soluble adhesive and the particle surface, making it more effective for the adhesive to exert its bonding effect. Therefore, an adhesive content of 3% or less is sufficient. Excessive adhesive content can also cause off-flavors when the reconstituted tobacco is heated, while the reconstituted tobacco of this invention does not require a high adhesive content to ensure bonding effectiveness, further improving the smoking quality. Specifically, the adhesive of this invention is selected from one or more of the following food thickeners or emulsifiers: sodium carboxymethyl cellulose, xanthan gum, carrageenan, sodium alginate, guar gum, and so on.

[0012] Plant cells are generally close to 50 μm in diameter. Therefore, when the diameter of tobacco particles in reconstituted tobacco is close to 50 μm, the cell walls of tobacco cells have been mechanically broken down. This allows aroma compounds and other internal components within the cells to more easily break through the cell walls and be released into the smoke. Furthermore, when the tobacco cell walls are mechanically broken down, water-soluble sugars and starches, which are viscous, can be more fully dispersed into the powder during processing. Since water and atomizing agents are added during reconstituted tobacco processing, the water-soluble sugars, after being partially dissolved in water, are more easily incorporated into the tobacco powder particles, acting as a thickener and binder. Starch, when mixed with water and heated, can gelatinize, enhancing the adhesion of the powder particles and improving the tensile strength and folding resistance of the reconstituted tobacco. This enhances the tobacco's resistance to breakage during the processing of tobacco leaves and cigarettes.

[0013] Preferably, the proportion of tobacco particles with a diameter of less than or equal to 50 μm is not less than 90% of the total, which can further increase the amount of nicotine migration and increase the amount of nicotine released during smoking.

[0014] The size of tobacco particles also affects the density of reconstituted tobacco. Controlling the diameter of tobacco particles to a smaller size allows for the production of higher-density reconstituted tobacco, thereby improving its tensile strength. On the other hand, excessively small tobacco particles are prone to flavor loss during processing, and may even overheat inside the pulverizer, leading to a burnt taste in the tobacco powder. Furthermore, collection after pulverization is difficult. Considering these factors, the present invention preferably controls the median particle size of the tobacco particles between 10-30 μm, preferably 15-25 μm. Within this particle size distribution, after extrusion and rolling, smaller particles fill the pores of larger particles, achieving more suitable particle packing. This ensures that the density of the reconstituted tobacco is controlled within a suitable range, increasing the thermal conductivity of the reconstituted tobacco while ensuring that the specific heat capacity of the tobacco is not too high, facilitating tobacco heating and smoking, and significantly improving nicotine migration. Accordingly, for the reconstituted tobacco of the present invention, the density is 0.9-1.1 g / cm³. 3 It can guarantee the amount of smoke produced and has a better taste.

[0015] Furthermore, for the reconstituted tobacco of the present invention, in order to obtain better tobacco production effect, the reconstituted tobacco also contains an atomizing agent, and the atomizing agent accounts for 15-25% of the total mass of the reconstituted tobacco.

[0016] Furthermore, for the reconstituted tobacco leaves of this invention, the moisture content is controlled at 4-8%, meaning the mass percentage of water in the reconstituted tobacco leaves is 4-8%. The reason for keeping the moisture content of the reconstituted tobacco leaves below 8% is that if the moisture content continues to increase, the gaseous water produced after heating will affect the atomizing effect of the atomizing agent. Studies have found that the higher the moisture content in the smoke formed after heating the reconstituted tobacco leaves, the weaker the visual effect of the aerosol smoke. The reason for keeping the moisture content of the reconstituted tobacco leaves below 4% is that excessively low moisture content not only increases the energy consumption required for drying in the reconstituted tobacco leaf manufacturing process but also makes the final reconstituted tobacco leaves brittle.

[0017] Furthermore, the thickness of the reconstituted tobacco leaf of the present invention can be 0.1-0.2 mm, preferably 0.13-0.18 mm. The thickness of the reconstituted tobacco leaf directly affects its processing resistance during subsequent cigarette manufacturing. Thicker reconstituted tobacco leaves, when subjected to bending stress, exhibit greater stress differences between their two surfaces, leading to decreased folding resistance. Especially in low-fiber-content roll-pressed or slurry-processed reconstituted tobacco leaves, excessive thickness can easily cause breakage of the reconstituted tobacco shreds when processing the sheets into shreds or rolling them into cigarettes. This affects the length of the reconstituted tobacco shreds, resulting in more broken shreds and dust, which in turn affects the filling performance of the reconstituted tobacco shreds and the integrity of the cigarette shred end face, leading to reduced stability of the reconstituted tobacco leaf. Simultaneously, the inability to guarantee filling performance also affects the overall smoking effect of the rolled cigarette. Furthermore, the thickness of the reconstituted tobacco leaf also affects its curl after shredding, thus impacting the filling performance of the reconstituted tobacco shreds. The thinner the tobacco leaf, the easier it is to curl after shredding, increasing elasticity and filling force during rolling. This reduces the filling weight per unit volume, resulting in a lower weight of the tobacco matrix in the cigarette. Consequently, the cigarette has insufficient draw resistance, feels hollow, and has a poor smoking experience. The absolute content of tobacco substances and atomizing agents is also insufficient, affecting the amount of smoke produced and hindering the development of a rich aroma. This invention, combined with a density requirement, sets the thickness of the reconstituted tobacco leaves to 0.13-0.18 mm, which avoids increased curvature after shredding while ensuring fold resistance.

[0018] The reconstituted tobacco of the present invention has a tensile strength of 0.35 kN / m or higher, thereby enhancing its resistance to breakage. Specifically, the tensile strength is typically between 0.35 and 0.45 kN / m. Furthermore, the reconstituted tobacco of the present invention may also include flavorings or fragrances to enrich its aroma.

[0019] Furthermore, the reconstituted tobacco of the present invention has a density set at 0.9-1.1 g / cm³. 3 Furthermore, setting the thickness to 0.13-0.18mm also helps to improve the tensile strength of reconstituted tobacco leaves, while increasing the amount of smoke and improving the nicotine migration rate.

[0020] This invention provides a smoke generator comprising the aforementioned various reconstituted tobacco leaves. The smoke generator of this invention can be inserted into a smoking device and heated directly by electric heating for inhalation. Alternatively, the smoke generator can be attached to a filter to form a heated non-combustible cigarette.

[0021] This invention also provides a manufacturing process for reconstituted tobacco leaves, comprising the following steps: dry material preparation: preparing tobacco raw materials into tobacco powder, wherein the sum of tobacco powders with a diameter less than 50 μm is not less than 85% of the total number of tobacco raw materials; wet material preparation: mixing water, atomizing agent, and adhesive to prepare wet material; dry and wet material mixing: mixing the above-mentioned tobacco powder and the wet material to obtain a mixture, and extruding and rolling the mixture to form a sheet; drying: drying the above-mentioned sheet to obtain the reconstituted tobacco leaves.

[0022] Specifically, the preparation of the aforementioned dry materials includes mixing incoming materials, removing impurities, adjusting moisture content, coarse crushing, and fine grinding.

[0023] Incoming material mixing refers to mixing incoming materials according to the formula ratio, which can be achieved by quantitative feeding and stirring using a belt scale.

[0024] Impurity removal refers to the removal of non-tobacco substances such as metals and plastics from tobacco raw materials, which can be achieved through metal detectors or air separation.

[0025] Moisture adjustment refers to adjusting the moisture content of tobacco raw materials to below 12% before coarse and fine grinding. The tobacco should have a moisture content below 12% before grinding. If the moisture content is too high, the tobacco lacks brittleness, making grinding difficult. If the grinding time is too long, the tobacco material is prone to overheating, altering its original flavor, such as producing a burnt taste, resulting in poor sensory quality of the reconstituted tobacco. If the moisture content of incoming tobacco leaves or stems is above 12%, they should be dried using drying equipment such as ovens or drying drums to reduce the moisture content to below 12%.

[0026] Coarse crushing involves feeding the tobacco raw materials, after adjusting their moisture content, into a coarse crusher to reduce the particle size of the tobacco leaves to below 5mm and the particle size of the tobacco stems to below 2mm, thus obtaining coarsely crushed tobacco raw materials for further fine grinding.

[0027] Fine grinding refers to further pulverizing coarsely crushed tobacco raw materials into ultrafine tobacco powder. Ultrafine tobacco powder can be achieved using a disc pulverizer. The principle is that tobacco fragments or coarse tobacco dust are added to two discs moving at different speeds. Under the squeezing and friction of the discs, the diameter of the tobacco particles gradually decreases until the particle size meets the set value. Then, under the action of air force through the pulverizer, the particles are blown out of the pulverizer. Particles with excessively large diameters are recycled back to the discs for further pulverization due to excessive gravity.

[0028] The diameter distribution of the tobacco particles is controlled by adjusting the airflow and grinding disc speed of the pulverizer. After multiple tests, parameters such as airflow and grinding disc speed were determined. When adjusting process parameters, a single process parameter is first determined for fine grinding. After grinding for a fixed time, samples of the obtained tobacco particles are taken and then sent to a particle size distribution analyzer to test their diameter distribution. If the preset tobacco particle size distribution and the required proportion of particle sizes are met, the process parameters obtained at that size can be used as the manufacturing process. If the tobacco particle size is not within the specified range—for example, if the tobacco particle diameter is large, or if the distribution does not meet the requirement that the sum of tobacco particles with a diameter less than or equal to 50 μm accounts for more than 85% of the total number of tobacco particles—further attempts can be made by reducing the airflow or increasing the grinding disc speed until the conditions are met.

[0029] Through research and experimentation, the inventors discovered that grinding with a grinding disc can ensure that the total number of tobacco particles with a diameter of 50 μm or less is not less than 85% of the total number of tobacco particles. Furthermore, the median diameter in the particle size distribution is between 10 and 30 μm.

[0030] The aforementioned wet material preparation refers to the uniform mixing of raw materials required for reconstituted tobacco leaf forming in a certain proportion, mainly including the mixing of water, atomizing agent, and binder. Generally, a mixing tank with a strong stirring function can be used for vigorous stirring to ensure thorough mixing of the three components. For example, water accounts for 50-75 parts, atomizing agent accounts for 20-40 parts, and binder accounts for 4-8 parts. The atomizing agent includes, but is not limited to, glycerol. In the preparation of wet materials, hot water is preferred, with temperatures selected from 60℃, 90℃, or between 60-90℃. Excessively high temperatures cause the tobacco material to over-mature; a water temperature within the range of 60-90℃ helps improve the permeability of the smoke.

[0031] The atomizing agent is preferably heated, with the temperature selected from 60℃, 90℃, or between 60℃ and 90℃. Excessively high temperatures will affect the maturation of the tobacco material, while excessively low temperatures will result in poor fluidity of the atomizing agent, which is detrimental to the stirring and mixing of wet materials. The preferred atomizing agent in this invention is glycerol.

[0032] Dry-wet material mixing refers to mixing dry and wet materials using a mixer to ensure uniform distribution and homogeneous mixing. Extruding the mixture involves using a screw extruder to extrude the irregular clumps formed after mixing, creating elongated strips for subsequent roll forming in a roller press. The screw extruder can also remove gas from the pores of the dry-wet mixture, making the material more compact and easier to roll form.

[0033] The aforementioned roll forming refers to pressing long strips of material through the pressure rollers of a roll press to form a sheet. The roll press consists of at least three stages, with each stage consisting of a pair of rollers, consistent in structure and principle with the roll presses used in traditional cigarette manufacturing for reconstituted tobacco. The gap between the rollers in the multi-stage roll pressing gradually decreases, achieving progressively thinner reconstituted tobacco sheet material. In this invention, the thickness of the wet sheet after exiting the last stage of pressure rollers is between 0.13-0.18 mm, including 0.13 mm and 0.18 mm.

[0034] The aforementioned drying process refers to the process where wet sheets are peeled off the pressure rollers by a scraper, continuously conveyed by a conveyor belt into a tunnel-type drying oven, dried with hot air to a suitable moisture content, and then cooled in a dry, room-temperature environment to form the finished reconstituted tobacco leaf. The moisture content of the finished reconstituted tobacco leaf in this invention is controlled between 4% and 8%, including 4% and 8%.

[0035] In the above drying steps, hot air drying is used, and the preferred temperature for hot air drying is 85-110℃. Excessive temperature can lead to a significant loss of volatile aroma substances, nicotine, glycerin, etc. For example, when using a conventional roller pressing method to dry reconstituted tobacco leaves at 110℃ or higher, a mixed mist of glycerin and water can be generated in the oven, accompanied by the diffusion of aroma substances. Studies have shown that controlling the drying temperature between 85-110℃ is preferable.

[0036] In the manufacturing process of reconstituted tobacco leaves of the present invention, the mass percentage of the atomizing agent is preferably 15-25%. Furthermore, using the manufacturing process of the present invention, the content of the adhesive added accounts for 3% or less of the total mass of the reconstituted tobacco leaves. The adhesive is selected from one or more of the following food thickeners or emulsifiers: sodium carboxymethyl cellulose, xanthan gum, carrageenan, sodium alginate, guar gum, etc.

[0037] Preferably, the reconstituted tobacco leaves produced using the manufacturing process of the present invention have a density of 0.9-1.1 g / cm³. 3 .

[0038] The tensile strength of the reconstituted tobacco obtained through the manufacturing process of this invention can reach 0.35 kN / m or higher. Attached Figure Description

[0039] Figure 1 The flowchart of the reconstituted tobacco production process according to a specific embodiment of the present invention is shown.

[0040] Figure 2 The powder particle size distribution diagram of Example 2 is shown.

[0041] Figure 3 The particle size distribution of the powder in Comparative Example 1 is shown. Detailed Implementation

[0042] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below.

[0044] In the following examples and comparative examples, similar processes are used to produce reconstituted tobacco leaves, including: dry material preparation, wet material preparation, dry and wet material mixing, and drying.

[0045] Specifically, refer to Figure 1 The process begins with mixing tobacco raw materials (tobacco leaves and stems), removing impurities, and adjusting the moisture content to below 12%. This is followed by coarse crushing and fine grinding. The particle size control parameters of the pulverizer are adjusted (high wind speed and low rotation speed yield larger particle sizes, while low wind speed and high rotation speed yield smaller particle sizes) to obtain tobacco powder with different particle size distributions, resulting in dry material A. Water (60℃), glycerin (60℃), and sodium carboxymethyl cellulose as the binder are mixed at a set mass ratio to obtain wet material B. Dry material A and wet material B are then mixed according to the specified ratio to obtain a clump-like or large-particle dry-wet mixture C. This mixture C is then fed into a screw press and roller press to form wet reconstituted tobacco sheet material D. Sheet material D is conveyed by a belt to a tunnel dryer to obtain dried sheet material E, the finished reconstituted tobacco product. This can then be further slit into reconstituted tobacco shreds for cigarette making.

[0046] The above parameters (e.g., density, thickness, moisture content) can be adjusted by modifying specific process parameters, such as rolling pressure, raw material ratio, heating temperature, and time. By varying the amount added and the process parameters, Examples 1-6 and Comparative Examples 1-5 were obtained, and the specific parameters are shown in Table 1.

[0047] For the determination of various parameters, for example, the density of the raw material reconstituted tobacco can be obtained by measuring its mass and calculating its volume before the reconstituted tobacco leaves are shredded, and then calculating it according to the density formula; the thickness of the reconstituted tobacco can be obtained by measurement.

[0048] The moisture content of the reconstituted tobacco leaves in the following examples and comparative examples was determined by existing known gas chromatography methods.

[0049] The particle size distribution of reconstituted tobacco leaves can be detected by a particle size distribution analyzer, and the median particle size can be calculated using relevant software to determine the percentage of particles smaller than a certain size.

[0050] The tensile strength of reconstituted tobacco can be measured by the following method: GB / T 12914 Determination of tensile strength of paper and paperboard - constant speed tensile test (20 mm / min).

[0051] The nicotine migration rate and smoking effect of the heated non-combustible cigarettes prepared in the following examples and comparative examples were detected by electrically heating them. The method for determining nicotine migration was as follows: gas chromatography was used to detect the nicotine content in the smoke captured by the Cambridge filter and the nicotine content in the reconstituted tobacco leaves of each cigarette, and the ratio of the two was the nicotine migration rate.

[0052] The method for determining woody off-flavors and smoke volume is as follows: using the same smoking device and the same heating conditions, the cigarette made from reconstituted tobacco leaves is electrically heated, and professional smokers are organized to evaluate and summarize the smoke effect and aroma of each puff.

[0053] Based on the relevant technical parameters involved in this patent, and according to the specific implementation method described above, the technical effects were compared and verified through controlled variable experiments. The following is a detailed description of the embodiments and proportions in Tables 1 and 2:

[0054] In the following examples and comparative examples, the degree of woody odor evaluation is arranged from largest to smallest as follows: obvious > relatively obvious > virtually none > none; in the smoke quantity evaluation, the smoke quantity is arranged from largest to smallest as follows: large > relatively large > medium > relatively small > small.

[0055] Figure 2 The particle size distribution of Example 2 shows that the median particle size is 23.0 μm, and particles with a diameter of 50 μm or less account for 88.9% of the total number of particles.

[0056] Figure 3 As shown in the figure for the particle size distribution of Comparative Example 1, the median particle size is 33.4 μm, and the number of particles with a particle size of less than or equal to 50 μm accounts for 70.5% of the total number of particles.

[0057] As shown in Table 2, the reconstituted tobacco leaves in Examples 1-6, even with little or no exogenous fiber, still exhibited good tensile strength and high nicotine migration rate, resulting in a large smoke volume with minimal woody off-flavors. In contrast, Comparative Examples 1-5, due to their high exogenous fiber content or unsuitable tobacco particle size, failed to simultaneously achieve high tensile strength, high nicotine migration rate, minimal woody off-flavors, and a large smoke volume.

[0058] Table 1 Parameters of Reconstituted Tobacco

[0059]

[0060] Table 2 Reconstituted tobacco and its properties in producing tobacco leaves

[0061]

[0062] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A reconstituted tobacco leaf, characterized in that, The compound contains 0% by weight of exogenous fiber and tobacco material, wherein the tobacco material is tobacco particles, the sum of the number of tobacco particles with a diameter less than or equal to 50 μm is not less than 85% of the total number of tobacco particles, the median diameter of the tobacco particles is 10-30 μm, and the density of the reconstituted tobacco leaf is 0.9-1.1 g / cm³. 3 The thickness of the reconstituted tobacco leaf is 0.13-0.18 mm, the tensile strength of the reconstituted tobacco leaf is 0.40 kN / m to 0.45 kN / m, and the reconstituted tobacco leaf also contains an adhesive, the adhesive accounting for no more than 3% of the mass of the reconstituted tobacco leaf.

2. The reconstituted tobacco leaf as described in claim 1, characterized in that, The moisture content of the reconstituted tobacco leaves is 4-8%.

3. The reconstituted tobacco leaf as described in claim 1, characterized in that, The reconstituted tobacco leaves also contain an atomizing agent, which accounts for 15-25% of the mass of the reconstituted tobacco leaves.

4. The reconstituted tobacco leaf as described in claim 1, characterized in that, The adhesive is selected from one or more of sodium carboxymethyl cellulose, xanthan gum, carrageenan, sodium alginate, guar gum, and guar gum.

5. A smoke-generating body, characterized in that, It includes reconstituted tobacco as described in any one of claims 1-4.

6. A manufacturing process for reconstituted tobacco leaves, characterized in that, For manufacturing reconstituted tobacco leaves as described in any one of claims 1-4, the following steps are included: Dry material preparation: tobacco raw materials are prepared into tobacco particles, wherein the sum of the number of tobacco particles with a diameter of less than or equal to 50 μm is not less than 85% of the total number of tobacco particles; Preparation of wet materials: Water, atomizing agent and adhesive are mixed to prepare wet materials; Dry and wet material mixing: The tobacco particles and the wet material are mixed to obtain a mixture, which is then extruded and rolled to form a sheet; Drying: The sheet is dried to obtain the reconstituted tobacco leaf.

7. The manufacturing process for reconstituted tobacco as described in claim 6, characterized in that, The preparation of the dry material includes adjusting the moisture content of the tobacco raw material to below 12% and then pulverizing it.

8. The manufacturing process of reconstituted tobacco as described in claim 7, characterized in that, The crushing process includes coarse crushing and fine grinding. The coarse crushing process involves feeding tobacco raw materials into a coarse crusher to reduce the particle size of tobacco leaves to below 5 mm and the particle size of tobacco stems to below 2 mm, thereby obtaining coarsely crushed tobacco raw materials. The fine grinding process involves extruding and rubbing the coarsely crushed tobacco raw materials through two grinding discs with different moving speeds to obtain the tobacco particles.

9. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, In the preparation of the wet material, water at 60-90℃ and an atomizing agent at 60-90℃ are mixed.

10. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, In the process of mixing dry and wet materials, the mixture is extruded into strip-shaped materials using a screw extruder.

11. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, In the process of mixing dry and wet materials, the thickness of the sheet formed by roll forming is 0.13-0.18 mm.

12. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, The drying process employs hot air drying, with a temperature of 85-110℃.

13. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, The resulting reconstituted tobacco leaves have a moisture content of 4-8%.

14. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, The added atomizing agent accounts for 15-25% of the mass of the reconstituted tobacco leaves.

15. The manufacturing process of reconstituted tobacco as described in claim 6, characterized in that, The adhesive is selected from one or more of sodium carboxymethyl cellulose, xanthan gum, carrageenan, sodium alginate, guar gum, and guar gum.

Images