Preparation method of tobacco-imitated type reconstituted tobacco, reconstituted tobacco and aerosol generation product of reconstituted tobacco

Abstract

The invention discloses a preparation method of tobacco-imitated type reconstituted tobacco, reconstituted tobacco and an aerosol generation product of the reconstituted tobacco. The tobacco-imitated type reconstituted tobacco is obtained by treating and post-treating a reconstituted tobacco sheet base through a sectional type drying method. According to the preparation method provided by the invention, a pulping process with relatively low cutting and relatively high fibrillation is adopted, so that relatively large tobacco stem fibers can be reserved, and the effect of simulating natural tobacco veins is achieved; the bulk of the reconstituted tobacco substrate is improved by adopting shoe squeezing; according to the method, the reconstituted tobacco substrates are obviously wrinkled by adopting a sectional type drying mode, namely, only circulating air is fed, steam heating is not performed, a relatively high circulating hot air temperature is maintained, and a high-temperature rapid dehydration mode is adopted, so that the non-flat state of natural tobacco leaves can be restored; the water-soluble tobacco components and the aroma-enhancing substances are loaded on the substrate in a spray coating manner, so that a rougher surface appearance can be created and is closer to natural tobacco leaves.

Description

Technical Field

[0001] This patent belongs to the field of reconstituted tobacco technology, specifically relating to a method for preparing reconstituted tobacco leaves that mimic tobacco leaves, reconstituted tobacco leaves and their aerosol products. Background Technology

[0002] Reconstituted tobacco is a filling material added to cigarette segments during cigarette production and processing. Currently, reconstituted tobacco is generally produced in China using a papermaking process. This process typically uses waste materials from tobacco processing, such as tobacco fragments, stems, and dust. After solvent extraction and solid-liquid separation, the liquid portion is concentrated into a paste, flavorings are added to create a coating solution, and the separated solid portion is used to make a substrate using traditional papermaking methods. The coating solution is then applied to the substrate, dried, and slit into thin sheets or filaments, also known as tobacco sheets.

[0003] Reconstituted tobacco plays a vital role in cigarette production, not only reducing costs but also improving the intrinsic quality of cigarettes. However, current reconstituted tobacco still differs significantly from natural tobacco in appearance and color. Reconstituted tobacco has a very uniform appearance and a smoother texture, while natural tobacco is more natural, exhibiting vein patterns. After being shredded and rolled into cigarettes, the difference between the two is easily discernible by visual inspection.

[0004] For example, patent document CN111789279A discloses a method for preparing reconstituted tobacco leaves that mimic natural tobacco leaves. This method involves evenly spreading prepared short hemp fibers onto a formed paper base in a vacuum filter box using a vibrating screen. After drying in a drying cylinder, a tobacco sheet with a rough surface and a certain coefficient of friction is formed. However, this also increases the proportion of added fibers, resulting in a strong woody aroma when smoked in cigarettes, affecting the smoking quality. Patent document CN102835731A discloses a paper-making reconstituted tobacco leaf with stripes or patterns. By pressing raised stripes or patterns onto the paper-making reconstituted tobacco leaf, its appearance after shredding closely resembles that of natural tobacco leaves. When blended with natural tobacco leaves to make cigarettes, the appearance is consistent, meeting the technical standards for the appearance of reconstituted tobacco leaves. However, after prolonged storage after rolling, it is extremely prone to deformation and reverting to its original shape. The patent document with publication number CN113349410B discloses a process and device for reconstituted tobacco leaves based on the stitching method of fragments. It adopts the dry papermaking process for reconstituted tobacco leaves and uses external fibers to fill and sew the gaps between fragmented leaves to produce a continuous whole sheet of reconstituted tobacco leaf substrate. However, it has the problems of low physical strength of reconstituted tobacco leaf products and high fragmentation rate after shredding.

[0005] Therefore, a reconstituted tobacco leaf with high physical strength, low lignin content, and an appearance highly similar to the natural veins and texture of natural tobacco leaves has been developed. This reduces waste such as tobacco fragments and dust, thereby improving the yield and smoking quality of the reconstituted tobacco leaf and minimizing the negative impact of lignin content on the sensory quality of the product. Furthermore, its addition to cigarettes makes the tobacco leaf form more acceptable to consumers. Summary of the Invention

[0006] The purpose of this patent is to provide a method for preparing reconstituted tobacco leaves that mimic natural tobacco leaves, as well as reconstituted tobacco leaves and their aerosol products. This aims to achieve reconstituted tobacco leaves with high physical strength, low lignin content, and an appearance highly similar to the natural vein patterns of natural tobacco leaves. This will improve the yield and smoking quality of the reconstituted tobacco leaves, reduce waste such as tobacco fragments and dust, and minimize the negative impact of lignin content on the sensory quality of the product. Furthermore, its use in cigarettes makes the tobacco shreds more acceptable to consumers.

[0007] To solve the above technical problems:

[0008] This patent provides a reconstituted tobacco leaf in the form of a tobacco leaf, which is obtained by processing the reconstituted tobacco leaf base through a segmented drying method and post-treatment.

[0009] Furthermore, segmented drying methods include room temperature circulating drying and high temperature circulating drying.

[0010] Furthermore, the segmented drying method includes the following steps:

[0011] Step S1: First stage drying: The reconstituted tobacco leaf base is dried for the first time using room temperature circulating drying conditions to remove the surface moisture of the reconstituted tobacco leaf base and obtain the first leaf base.

[0012] Step S2: Second stage drying, using high temperature circulating drying conditions to dry the first substrate a second time, in order to form natural vein texture on the surface of the first substrate, to obtain the second substrate;

[0013] Step S3: Third stage drying. The second sheet base is dried for the third time using room temperature circulating drying conditions to remove the surface moisture of the reconstituted tobacco leaf base, thus obtaining the third sheet base.

[0014] Furthermore, in step S1, the temperature for the first drying is 25–27°C, 27–30°C, or 30–32°C.

[0015] Furthermore, the wind speed for the first drying process is 30–35 m / s, 35–40 m / s, or 40–50 m / s.

[0016] Furthermore, the first drying time is 0.2 to 1.0 min, resulting in a moisture content of 35 ± 3% for the first substrate.

[0017] Furthermore, in step S2, the temperature for the second drying is 120–130°C, 130–140°C, or 140–150°C.

[0018] Furthermore, the wind speed during the second drying process is 30–35 m / s, 35–40 m / s, or 40–50 m / s.

[0019] Furthermore, the second drying time is 0.2 to 0.8 minutes, resulting in a moisture content of 20 ± 3% for the second substrate.

[0020] Furthermore, in step S3, the temperature for the third drying is 25–27°C, 27–30°C, or 30–32°C.

[0021] Furthermore, the wind speed during the third drying process is 30–35 m / s, 35–40 m / s, or 40–50 m / s.

[0022] Furthermore, the third drying time is 0.2 to 1.0 min, resulting in a moisture content of 18 ± 3% for the third substrate.

[0023] Furthermore, the preparation of the reconstituted tobacco leaf base includes the following steps:

[0024] Step A: Extract the material and separate the extract and solids;

[0025] Step B: Pulping the solids to obtain slurry, which is then processed to obtain reconstituted tobacco leaf base.

[0026] Furthermore, in step A, the materials include tobacco raw materials and / or outer fibers, and the mass ratio of tobacco raw materials to outer fibers is 1:(0.2-0.3), 1:(0.3-0.4), or 1:(0.4-0.5).

[0027] Furthermore, the tobacco raw materials include one or more of tobacco stems, tobacco dust, and fragments; the outer fibers include bamboo fiber and / or wood pulp fiber; the wood pulp fiber includes coniferous wood and / or hardwood.

[0028] Furthermore, in step A, the extraction of the material includes a first water extraction and a second water extraction;

[0029] Furthermore, in the first water extraction, the mass of water is 6 to 7 times, 7 to 9 times, or 9 to 10 times the mass of the first tobacco raw material, which is tobacco stems. After separation, the first extract and the first solids are obtained.

[0030] Furthermore, the temperature of the first water extraction is 40–50℃, 50–65℃, or 65–80℃, and the time for the first water extraction is 20–30 min, 30–45 min, or 45–60 min.

[0031] Furthermore, in the second water extraction, the mass ratio of the second tobacco raw material to the outer fiber is 1:(0.2-0.3), 1:(0.3-0.4), or 1:(0.4-0.5); the mass ratio of water is 6-10 times the mass of the second tobacco raw material, and the second extract and the second solid are obtained after separation.

[0032] Furthermore, the temperature of the second water extraction is 40–50℃, 50–65℃, or 65–80℃, and the time of the second water extraction is 30–40 min, 40–50 min, or 50–60 min.

[0033] Furthermore, step B, the pulping of the solids, includes a first pulping and a second pulping.

[0034] Furthermore, the first pulping is performed using the first solids. The conditions for the first pulping are: pulping to a freeness of 7-8°SR, 8-10°SR, or 10-12°SR to obtain the first pulp.

[0035] Furthermore, the wet weight of the first slurry is 11–13g, 13–15g, or 15–18g.

[0036] Furthermore, the second pulping is carried out by mixing the first pulp and the second solids. The first pulp and the second solids are mixed in a mass ratio of 1:(0.5 to 4.0). The conditions for the second pulping are: pulping to a freeness of 40 to 42°SR, 42 to 44°SR or 44 to 45°SR to obtain the second pulp.

[0037] Furthermore, in step B, the wet weight of the slurry is 2.0–2.2 g, 2.2–2.4 g, or 2.4–3.0 g.

[0038] Further, the post-processing includes the following steps: adding tobacco powder and flavoring to the extract, mixing evenly to obtain a coating solution; spraying the reconstituted tobacco leaf base with the coating solution, and drying to obtain a tobacco leaf-shaped reconstituted tobacco leaf;

[0039] Furthermore, the extract is a mixture of the first extract and the second extract, with the first extract and the second extract mixed in a ratio of (0.5-2.0):(0.5-2.0).

[0040] Furthermore, the amount of tobacco powder added is 0.1% to 2.0% of the weight percentage of the mixed extract.

[0041] Furthermore, the amount of flavoring and fragrance added is 2.0% to 5.0% of the weight percentage of the mixed extract.

[0042] Furthermore, the spraying amount of the coating liquid is 30-35 g / m². 2 35~40g / m 2 Or 40-50g / m 2 ;

[0043] Furthermore, the drying temperature is 60–65℃, 65–75℃, or 75–85℃; the drying time is 10–20 min, 20–30 min, or 30–40 min.

[0044] Furthermore, the moisture content of the imitation tobacco leaf type reconstituted tobacco leaf is 11-12%, 12-13%, or 13-15%; the basis weight of the imitation tobacco leaf type reconstituted tobacco leaf is 90-105 g / m³. 2 .

[0045] Another aspect of this patent provides an aerosol-generated article, which includes the aforementioned reconstituted tobacco leaf model.

[0046] Preferably, the aerosol-generating products can be either heated cigarettes or conventional cigarettes, and their specifications are usually named according to the length of the cigarette, as described below. "Standard" typically refers to a cigarette with a length in the range of 68mm to 75mm, for example, approximately 68mm to approximately 72mm; "short" or "mini" refers to a cigarette with a length of less than 68mm; "extra-standard" typically refers to a cigarette with a length in the range of 75mm to 91mm, for example, approximately 79mm to approximately 88mm; "long" or "extra-long" typically refers to a cigarette with a length in the range of 91mm to 105mm, for example, approximately 94mm to approximately 101mm; and "extra-long" typically refers to a cigarette with a length in the range of approximately 110mm to approximately 121mm. Additionally, cigarette articles are named according to the outer circumference of the cigarette, as described below. The terms "standard" and "extra-fine" refer to cigarettes with a circumference of approximately 23mm to 25mm; "coarse" refers to cigarettes with a circumference of more than 25mm; "fine" refers to cigarettes with a circumference of approximately 22mm to 23mm; "long and thin" refers to cigarettes with a circumference of approximately 19mm to 22mm; "extra-fine" refers to cigarettes with a circumference of approximately 16mm to 19mm; and "micro-fine" refers to cigarettes with a circumference of less than 16mm. Therefore, extra-standard and extra-fine cigarettes have, for example, a length of approximately 83mm and a circumference of approximately 17mm. Standard and extra-standard cigarettes, with a length of 75mm to 91mm and a circumference of 23mm to 25mm, are popular with many customers. Cigarette products of various sizes can also be manufactured with filters of different lengths. Generally, short filters are used for cigarette products with both short length and short circumference. Typically, filter tip lengths range from 15mm, used with "short" and "standard" cigarettes, to 30mm, used with "extra long" and "extra thin" cigarettes. The tipping paper in the longitudinal direction of the cigarette with a filter tip is, for example, 3mm to 10mm longer than the filter tip.

[0047] Preferably, the aerosol forming article includes an aerosol forming matrix, a support element, an aerosol cooling element, and a mouthpiece. Preferably, the aerosol forming matrix, support element, aerosol cooling element, and mouthpiece are generally cylindrical and have substantially similar outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter between about 5 mm and about 12 mm, for example, between about 5 mm and about 10 mm, or between about 6 mm and about 8 mm. In a preferred embodiment, the outer diameter is 7.2 mm ± 10%.

[0048] Preferably, the reconstituted tobacco leaf constitutes at least part of the aerosol-forming matrix, which may have a length between about 5 mm and about 15 mm, for example, between about 8 mm and about 12 mm. In one embodiment, the aerosol-forming matrix may have a length of about 1 mm. In a preferred embodiment, the aerosol-forming matrix has a length of about 12 mm.

[0049] Preferably, the support element can be located directly downstream of the aerosol forming matrix and can be close to the aerosol forming matrix.

[0050] Preferably, the support element can be formed from any suitable material or combination of materials. For example, the support element can be formed from one or more materials selected from the group consisting of: cellulose acetate; paperboard; crimped paper, such as crimped heat-resistant paper or crimped parchment; and polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the support element is formed from cellulose acetate.

[0051] Preferably, the support element may include a hollow tubular element. In a preferred embodiment, the support element includes a cellulose acetate tube.

[0052] Preferably, the support element may have a length between approximately 5 mm and approximately 15 mm. In a preferred embodiment, the support element has a length of approximately 8 mm.

[0053] Preferably, the aerosol cooling element can be located downstream of the aerosol forming matrix. For example, the aerosol cooling element can be located directly downstream of and adjacent to the support element. Alternatively, the aerosol cooling element can be located between the support element and the mouthpiece, which is located at the downstream end of the aerosol-generating article.

[0054] Aerosol cooling elements can have approximately 300 mm per millimeter in length. 2 With a length of approximately 1000 mm per mm 2 The total surface area between. In a preferred embodiment, the aerosol cooling element has approximately 500 mm per mm of length. 2 The total surface area.

[0055] Preferably, the aerosol cooling element has low suction resistance. That is, preferably, the aerosol cooling element provides low resistance to air passing through the aerosol-generated article. Preferably, the aerosol cooling element has virtually no impact on the suction resistance of the aerosol-generated article.

[0056] Preferably, the aerosol cooling element may include a plurality of longitudinally extending channels. The plurality of longitudinally extending channels may be defined by a sheet material that has undergone one or more of curling, pleating, gathering, and folding to form the channels. Alternatively, the plurality of longitudinally extending channels may be defined by a single sheet that has undergone one or more of curling, pleating, gathering, and folding to form the multiple channels.

[0057] Preferably, in some embodiments, the aerosol cooling element may comprise an aggregate sheet of material selected from the group consisting of: metal foil, polymeric materials, and substantially non-porous paper or paperboard. In some embodiments, the aerosol cooling element may comprise an aggregate sheet of material selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminum foil. In a preferred embodiment, the aerosol cooling element comprises an aggregate sheet of biodegradable material. For example, an aggregate sheet of non-porous paper or an aggregate sheet of biodegradable polymeric material (such as polylactic acid).

[0058] Preferably, the aerosol cooling element can be made of a material with a diameter of approximately 10 mm. 2 / mg to approximately 100mg 2 An aggregate of material with a specific surface area between 1 / mg / kg is formed. In some embodiments, the aerosol cooling element may be composed of sheets having a surface area of ​​approximately 35mm. 2 Aggregate lamellar formation of materials with a specific surface area of ​​ / mg.

[0059] Preferably, the aerosol generating article may include a mouthpiece located at the mouth end of the aerosol generating article. The mouthpiece may be located directly downstream of and abutting the aerosol cooling element. The mouthpiece may include a filter. The filter may be formed of one or more suitable filter materials. Many such filter materials are known in the art. In one embodiment, the mouthpiece may include a filter formed of cellulose acetate tow.

[0060] Preferably, the components of the aerosol-generating article (e.g., the aerosol-forming matrix and any other components of the aerosol-generating article, such as support elements, aerosol cooling elements, and mouthpieces) are surrounded by an outer packaging. The outer packaging is formed of any suitable material or combination of materials. Preferably, the outer packaging paper is cigarette paper.

[0061] Preferably, the aerosol-forming matrix of the aerosol-generating article can interact with the aerosol-generating device to generate an aerosol. Preferably, the aerosol-generating device is a smoking device that interacts with the aerosol-generating matrix of the aerosol-generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth. The aerosol-generating device can be a fixator for a smoking article.

[0062] This patent provides a method for preparing reconstituted tobacco leaves that mimic natural tobacco leaves, as well as the reconstituted tobacco leaves and their aerosol products. During the stem thinning process, a pulping process with lower cutting and higher fiber separation is adopted, which can retain larger stem fibers, mimicking the vein structure of natural tobacco leaves. In the papermaking stage, boot pressing is used to increase the bulk of the reconstituted tobacco leaf substrate, ensuring better penetration of the coating liquid into the substrate during the spray coating stage. During the drying process, a segmented drying method is used. The first and third stages only introduce circulating air without steam heating, while the second stage uses steam heating and maintains a high circulating hot air temperature. This high-temperature, rapid dehydration method causes significant wrinkling of the reconstituted tobacco leaf substrate, thus restoring the uneven state of natural tobacco leaves. Spray coating is used to load water-soluble tobacco components and flavoring substances onto the substrate, creating a rougher surface appearance that more closely resembles natural tobacco leaves. Attached Figure Description

[0063] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0064] Figure 1 This is a flowchart illustrating the preparation process of the anti-smoke reconstituted tobacco leaf in this patent. Detailed Implementation

[0065] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0066] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings:

[0067] As used in this patent, the term "pulping" is also known as "de-fibering" or "fiber breaking," referring to the process of cutting, separating, and making into a pulp from tobacco fibers or other fibers.

[0068] As used in this patent, the term "freezing degree" refers to the degree of beating, expressed by °SR, which reflects the effect of refining processes such as fiber cutting, splitting, swelling, and hydration after the pulp has passed through a refiner.

[0069] As used in this patent, the term "slurry" refers to a mixture of pulp and water after the tobacco fiber or other fiber has been loosened;

[0070] As used in this patent, the term "wet weight" refers to the total mass of wet fibers adhering to the ribs of a specially designed metal frame when pulp is tested using a Schubert freeness tester. This method is based on the correlation between fiber length and frame pulp retention: as the average fiber length increases, the fiber network formed between the frame ribs becomes denser, and the amount of retained fibers increases accordingly. According to the national standard GB / T 37858-2019, the frame consists of 25 parallel ribs with a rib spacing of 2 mm and a total width of 50 mm for wet weight testing.

[0071] As used in this patent, "pre-papermaking tank" refers to the slurry storage tank before papermaking, also known as the slurry forming tank. The fiber ratio and concentration of the slurry in the pre-papermaking tank are quite stable and meet the requirements for papermaking.

[0072] As used in this patent, "shoe press" refers to a novel papermaking pressing and dewatering technology. Compared with traditional pressing, the pressing zone of a shoe press is 6 to 10 times larger than that of a traditional roll press. The shoe press mainly consists of a shoe roll, a back pressure roll, a load locking device, and some auxiliary components. Paper machines using shoe presses have low energy consumption and excellent performance in terms of finished product quality and bulk.

[0073] As used in this patent, "absolutely dry basis weight," also known as sheet basis weight, refers to the weight of paper per unit area in a completely dry state with zero moisture content, expressed in g / m². 2 ;

[0074] As used in this patent, the term "sheet base" refers to the sheet-like material formed after the pulp interweaves with each other in the wire mesh and is dehydrated during the reconstituted tobacco production process;

[0075] As used in this patent, the term "coating" refers to the process of uniformly applying a prepared coating solution onto a substrate so that the substrate can fully and uniformly absorb the coating solution.

[0076] As used in this patent, the term "bulkness" refers to the volume occupied by a unit weight of sheet substrate, used to indicate the density of the sheet substrate, and the unit is cm. 3 / g;

[0077] As used in this patent, the term "tensile strength" refers to the maximum tension that a reconstituted tobacco leaf per unit width can withstand before breaking under conditions specified by standard test methods, expressed in kN / m.

[0078] As used in this patent, the terms “comprising” or “having” have the same meaning as “containing”, and also include other forms of the term, such as the gerund and singular forms in English, meaning including but not limited to, and not intended to exclude, for example, other elements, components, integers or steps.

[0079] All figures used to represent component amounts, properties (e.g., weight-average molecular weight), reaction conditions, etc., should be considered in all cases modified by the terms "within the unavoidable margin of error" or "approximately". Therefore, the numerical values ​​presented herein are approximate and may vary depending on the desired properties sought to be obtained by this patent. The principle of equivalents, which is applied to a minimum and not intended to limit the scope of the claims, should be applied, for example, each value should be interpreted at least according to the reported significant digits and by applying conventional rounding techniques.

[0080] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0081] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0082] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0083] All references cited in this application are incorporated herein by way of citation in their entirety, to the extent that they do not contradict the disclosure herein. It will be apparent to those skilled in the art that products (apparatus, components, devices, compounds, compositions, materials, etc.) and methods (processes, steps, conditions, parameters, equipment, and test methods, equipment, etc.) not specifically described herein can be applied to the implementation of the invention fully disclosed herein without the need for excessive experimentation. This patent is intended to cover all functional equivalents known in the art of the methods, apparatus, apparatus components, materials, processes, and techniques specifically described herein.

[0084] Furthermore, multiple publications are referenced throughout this specification. To provide a more comprehensive description of the current state of the art in which this disclosure pertains, the entire contents of these publications are incorporated herein by reference. With regard to the content contained in published documents and in the statements that cite them, each published document is also incorporated herein by reference individually and specifically.

[0085] All the components used in this patent can be prepared by various known methods that are fully disclosed in the chemical literature.

[0086] Before disclosing and describing the materials, compounds, compositions, articles, apparatus, and methods of this patent, it should be understood that the following aspects are not limited to specific synthetic methods or specific reagents, as these are of course subject to variation. It should also be understood that the terminology used herein is for descriptive purposes only and not for limitation.

[0087] like Figure 1 As shown, this patent provides a method for preparing reconstituted tobacco leaves that mimic tobacco leaves, reconstituted tobacco leaves and their aerosol products, including the following steps:

[0088] Step A: Perform a first water extraction using the first tobacco raw material to separate the first extract and the first solids. The first tobacco raw material includes tobacco stems. Perform a first pulping of the first solids to obtain the first pulp.

[0089] Step B: A second water extraction is performed using the second tobacco raw material and the outer fiber to separate the second extract and the second solids. The second tobacco raw material includes fragments and / or tobacco dust.

[0090] Step C: Mix the first solid material obtained in step A with the second solid material obtained in step B, and then perform a second pulping to obtain a second slurry. The second slurry is then formed to obtain the first sheet substrate.

[0091] Step D: Place the first substrate in an oven for segmented drying. The first and last parts of the oven are filled with ambient temperature circulating air to remove moisture from the surface of the first substrate, while the middle part is filled with hot air circulating air, which allows the surface of the first substrate to form a natural vein texture and quickly set its shape.

[0092] Step E: Mix the first extract obtained in step A with the second extract obtained in step B, add tobacco powder and flavoring to obtain the coating liquid;

[0093] Step F: The coating liquid obtained in step E is used to coat the first substrate obtained in step C. After drying, a tobacco leaf-like reconstituted tobacco leaf is obtained.

[0094] 1. Step A specifically involves:

[0095] (1) The first tobacco raw material is mixed with water at a temperature of 40-80℃ in a ratio of 1:(6-10) and placed in an extraction tank for the first water extraction. The extraction time is 20-60 minutes. After separation, the first extract and the first solid are obtained.

[0096] The first tobacco raw material includes tobacco stems.

[0097] (2) The first solid material is placed in a fiber disintegrator (purchased from Shandong Animate Instrument Co., Ltd.) for the first pulping (splitting). The pulping is performed until the freeness is maintained at 7-12°SR. The wet weight of the first pulp is tested according to the national standard GB / T 37858-2019. The wet weight is maintained at 11-18g to obtain the first pulp.

[0098] The first pulping process is used to break down large pieces of tobacco stems into smaller pieces, which makes it easier to uniform the fineness of the material during the subsequent second pulping process, thereby improving the uniformity of the product.

[0099] 2. Step B specifically involves:

[0100] (1) Mix the second tobacco raw material with the outer fiber in a ratio of 1:(0.1 to 0.5) to obtain a mixture.

[0101] The second tobacco raw material includes fragments and / or tobacco dust.

[0102] The outer fibers include bamboo fibers and / or wood pulp fibers. The bamboo fibers are prepared using paper-grade bamboo pulp with an average degree of polymerization greater than 1000 as raw material and employing bamboo fiber preparation processes well-known to those skilled in the art. The wood pulp fibers are typically softwood pulp fibers and / or hardwood pulp fibers, including, but not limited to, poplar pulp fibers, Chinese poplar pulp fibers, fast-growing poplar pulp fibers, Masson pine pulp fibers, larch pulp fibers, red pine pulp fibers, spruce pulp fibers, birch pulp fibers, linden pulp fibers, eucalyptus pulp fibers, and maple pulp fibers. Preferably, the wood pulp fibers are selected from one or more of Masson pine pulp fibers, larch pulp fibers, spruce pulp fibers, birch pulp fibers, poplar pulp fibers, and maple pulp fibers.

[0103] (2) Place the mixture in an extraction tank, and add water at a temperature of 40-80°C at 6-10 times the weight of the mixture for a second water extraction. The extraction time is 30-60 minutes. After separation, the second extract and the second solid are obtained.

[0104] 3. Step C specifically involves:

[0105] (1) Mix the first slurry obtained in step A with the second solids obtained in step B in a ratio of 1:(0.5 to 4.0), and then place it in a refiner for a second pulping. Pulping is carried out until the freeness is maintained at 40 to 45°SR. The wet weight is maintained at 2.0 to 3.0g according to the wet weight test method in step A to obtain the second slurry.

[0106] The second pulping process involves a pulp pressure of 150–220 kPa and a frequency of 35–40 Hz.

[0107] (2) The second pulp prepared above is transferred to the pre-papering tank, which is pumped to the high-level tank in the paper machine workshop by a pulp pump. It is then mixed with concentrated white water by a flushing pump and pumped to the wire screen of the paper machine, and then enters the headbox of the paper machine. The second pulp is dewatered and shaped by the wire; then it is processed by shoe press and multiple cylinders to become a wet substrate with an oven-dry basis weight of 55-65 g / m³. 2 This is the first substrate.

[0108] 4. Step D specifically involves:

[0109] (1) The first substrate prepared in step C above is placed in an oven for segmented drying to obtain the second substrate. The oven has 5 to 9 sections, including a first section, a second section, and a third section. The first section has 2 sections, the second section has 2 to 6 sections, and the third section has 1 section. The first and third sections use ambient temperature circulating air to remove moisture from the surface of the first substrate. The second section uses hot air circulating air to form natural vein textures on the surface of the first substrate and to quickly set its shape.

[0110] The first drying process is carried out in the first stage. The conditions for the first drying are: a temperature of 25-32℃, a wind speed of 50m / s, and a drying time of 0.2-1.0min, so that the moisture content is 35±3%.

[0111] The second stage involves a second drying process. The drying conditions for the second drying are: a temperature of 120–150℃, a wind speed of 30–50 m / s, and a drying time of 0.2–0.8 min, resulting in a moisture content of 20 ± 3%.

[0112] The third stage involves a third drying process. The drying conditions for the third drying are: a temperature of 25-32℃, a wind speed of 50m / s, and a drying time of 0.2-1.0min, resulting in a moisture content of 18±3%.

[0113] (2) The second substrate, after being dried in sections, is rolled into a roll.

[0114] 5. Step E specifically includes:

[0115] (1) The first extract obtained in step A and the second extract obtained in step B are mixed in a ratio of (0.5-2.0):(0.5-2.0) to obtain a mixed extract.

[0116] (2) Add 100-300 mesh tobacco powder at a weight percentage of 0.1-2.0% of the mixed extract, and add fragrance and flavoring at a weight percentage of 2.0-5.0% of the mixed extract. After mixing evenly, a coating liquid is obtained.

[0117] Non-limiting examples of flavorings and fragrances include peppermint, cinnamon, cherry, coconut, coffee, chocolate, vanilla, citrus (e.g., grapefruit, orange, lime, bergamot, or lemon), menthol, licorice, caramel, honey, peanut, walnut, cashew, hazelnut, almond, pineapple, strawberry, raspberry, tropical fruit, cherry, cinnamon, peppermint, deer hoof grass, spearmint, eucalyptus, apple, pear, peach, strawberry, apricot, raspberry, cherry, pineapple, lemongrass, lime, chili, capsaicin, citrus, tobacco flavor, bergamot, smoky flavoring, plum, eucalyptus, clove, bay leaf, fennel, thyme, cedar leaf, and nutmeg flavoring.

[0118] 6. Step F specifically includes:

[0119] (1) Unroll the second substrate in the roll shape prepared in step D above, and uniformly coat the coating liquid prepared in step E above onto the surface of the unrolled second substrate.

[0120] The coating amount of the coating liquid is 30-50 g / m². 2 , and thus obtained the third base.

[0121] (2) The third substrate prepared in step (1) is dried for the fourth time. The conditions for the fourth drying are 60-85℃ and 10-40 min, so that the moisture content is 11-15%, and the fourth substrate is obtained, which is the imitation tobacco leaf type reconstituted tobacco leaf.

[0122] Using the above-mentioned reconstituted tobacco leaf model as a smoke-generating matrix, aerosol-generating products were prepared.

[0123] Example 1

[0124] (1) Mix tobacco stems with water at 60°C in a ratio of 1:6 and place them in an extraction tank for the first water extraction. The extraction time is 30 minutes. After separation, the first extract and the first solid are obtained.

[0125] (2) The first solids were placed in a fiber disintegrator for the first pulping, and the pulping was maintained at a freeness of 8°SR and a wet weight of 16g ​​to obtain the first pulp.

[0126] (3) Mix the tobacco powder and the outer fiber in a ratio of 1:0.2 to obtain a mixture;

[0127] (4) Place the mixture in an extraction tank, add water at 50°C at 6 times the weight of the mixture for a second water extraction. The extraction time for the second water extraction is 30 minutes. After separation, the second extract and the second solid are obtained.

[0128] (5) The first solid obtained in step (1) and the second solid obtained in step (4) are mixed in a ratio of 1.0:1.0 and then placed in a pulper for a second pulping. The pulp pressure for the second pulping is 150 kPa and the frequency is 40 Hz. The pulping is continued until the freeness is maintained at 50°SR and the wet weight is maintained at 2.1 g to obtain the second pulp.

[0129] (6) The second pulp is placed in the pre-pressing tank, and after passing through a forming water network, boot press, and multiple cylinders, it becomes a wet substrate with a preliminary shape. The oven-dry weight is 55 g / m³. 2 This is the first substrate;

[0130] (7) The first substrate prepared in step (6) above is placed in an oven for segmented drying. The oven has three sections. The first section consists of two segments for the first drying, with the following conditions: temperature of 28℃, wind speed of 50m / s, and drying time of 0.4min. The second section consists of six segments for the second drying, with the following conditions: temperature of 140℃, wind speed of 50m / s, and drying time of 0.4min. The third section consists of one segment for the third drying, with the following conditions: temperature of 28℃, wind speed of 50m / s, and drying time of 0.3min. The resulting second substrate is rolled into a cylindrical shape.

[0131] (8) Mix the first extract obtained in step (1) with the second extract obtained in step (4) in a 1:1 ratio to obtain a mixed extract;

[0132] (9) Add 2.0% by weight of 200-mesh tobacco powder to the mixed extract obtained in step (8), and then add 3.0% by weight of lemon flavoring to the mixed extract. After mixing evenly, a coating liquid is obtained.

[0133] (10) Unroll the second substrate in the roll shape prepared in step (7) above, and uniformly spray the coating liquid prepared in step (9) above onto the surface of the unrolled second substrate; the spraying amount of the coating liquid is 40 g / m 2 The third base was obtained;

[0134] (11) The third substrate prepared in step (10) above is dried for the fourth time. The conditions for the fourth drying are drying at 75°C for 35 minutes to make the moisture content 11% and obtain the fourth substrate, which is the imitation tobacco leaf type reconstituted tobacco leaf.

[0135] (12) Using the reconstituted tobacco leaf of the imitation tobacco leaf type prepared in step (11) above as the tobacco-generating matrix, an aerosol-generating product is prepared.

[0136] Example 2

[0137] (1) Mix tobacco stems with water at 70°C in a ratio of 1:7 and place them in an extraction tank for the first water extraction. The extraction time is 35 minutes. After separation, the first extract and the first solid are obtained.

[0138] (2) The first solids were placed in a fiber disintegrator for the first pulping, and the pulping was maintained at a freeness of 9°SR and a wet weight of 14g to obtain the first pulp.

[0139] (3) Mix the tobacco powder and the outer fiber in a ratio of 1:0.3 to obtain a mixture;

[0140] (4) Place the mixture in an extraction tank, add water at 60°C at 7 times the weight of the mixture for a second water extraction. The extraction time for the second water extraction is 35 min. After separation, the second extract and the second solid are obtained.

[0141] (5) The first solid obtained in step (1) and the second solid obtained in step (4) are mixed in a ratio of 1.0:1.2 and then placed in a pulper for a second pulping. The pulp pressure for the second pulping is 150 kPa and the frequency is 40 Hz. The pulping is continued until the freeness is maintained at 45°SR and the wet weight is maintained at 2.3 g to obtain the second pulp.

[0142] (6) The second pulp is placed in the pre-pressing tank, and after passing through a forming water net, boot press, and multiple cylinders, it becomes a wet substrate with a preliminary shape. The oven-dry weight is 60 g / m³. 2 This is the first substrate;

[0143] (7) The first substrate prepared in step (6) above is placed in an oven for segmented drying. The oven has three sections. The first section is one segment, which is dried for the first time. The conditions for the first drying are: temperature of 28℃, wind speed of 40m / s, and drying time of 0.6min. The second section is six segments, which is dried for the second time. The conditions for the second drying are: temperature of 130℃, wind speed of 45m / s, and drying time of 0.6min. The third section is one segment, which is dried for the third time. The conditions for the third drying are: temperature of 28℃, wind speed of 40m / s, and drying time of 0.5min. The second substrate is obtained and rolled into a cylindrical shape.

[0144] (8) Mix the first extract obtained in step (1) with the second extract obtained in step (4) in a 1:1 ratio to obtain a mixed extract;

[0145] (9) Add 1.0% by weight of 100-mesh tobacco powder to the mixed extract obtained in step (8), and then add 2.0% by weight of lemon flavoring to the mixed extract. After mixing evenly, a coating liquid is obtained.

[0146] (10) Unroll the second substrate in the roll shape prepared in step (7) above, and uniformly spray the coating liquid prepared in step (9) above onto the surface of the unrolled second substrate; the spraying amount of the coating liquid is 30g / m 2 The third base was obtained;

[0147] (11) The third substrate prepared in step (10) above is dried for the fourth time. The conditions for the fourth drying are drying at 70°C for 25 minutes to make the moisture content 13% and obtain the fourth substrate, which is the imitation tobacco leaf type reconstituted tobacco leaf.

[0148] (12) Using the reconstituted tobacco leaf of the imitation tobacco leaf type prepared in step (11) above as the tobacco-generating matrix, an aerosol-generating product is prepared.

[0149] Example 3

[0150] (1) Mix tobacco stems with water at 80°C in a ratio of 1:8 and place them in an extraction tank for the first water extraction. The extraction time is 40 min. After separation, the first extract and the first solid are obtained.

[0151] (2) The first solids were placed in a fiber disintegrator for the first pulping, and the pulping was carried out until the freeness was maintained at 10°SR and the wet weight was maintained at 13g to obtain the first pulp.

[0152] (3) Mix the tobacco powder and the outer fiber in a ratio of 1:0.2 to obtain a mixture;

[0153] (4) Place the mixture in an extraction tank, add water at 70°C at 8 times the weight of the mixture for a second water extraction. The extraction time for the second water extraction is 40 min. After separation, the second extract and the second solid are obtained.

[0154] (5) The first solid obtained in step (1) and the second solid obtained in step (4) are mixed in a ratio of 1.0:1.0 and then placed in a pulper for a second pulping. The pulp pressure for the second pulping is 150 kPa and the frequency is 40 Hz. The pulping is continued until the freeness is maintained at 42°SR and the wet weight is maintained at 2.4 g to obtain the second pulp.

[0155] (6) The second pulp is placed in the pre-pressing tank, and after passing through a forming water net, boot press, and multiple cylinders, it becomes a wet substrate with a preliminary shape. The oven-dry weight is 62 g / m³. 2 This is the first substrate;

[0156] (7) The first substrate prepared in step (6) above is placed in an oven for segmented drying. The oven has three sections. The first section consists of two segments for the first drying, with the following conditions: temperature of 28℃, wind speed of 30m / s, and drying time of 1min. The second section consists of six segments for the second drying, with the following conditions: temperature of 130℃, wind speed of 30m / s, and drying time of 0.8min. The third section consists of one segment for the third drying, with the following conditions: temperature of 28℃, wind speed of 30m / s, and drying time of 0.8min. The resulting second substrate is rolled into a cylindrical shape.

[0157] (8) Mix the first extract obtained in step (1) with the second extract obtained in step (4) in a 1:1 ratio to obtain a mixed extract;

[0158] (9) Add 1.2% by weight of 200-mesh tobacco powder to the mixed extract obtained in step (8), and then add 2.3% by weight of citrus flavoring to the mixed extract. After mixing evenly, a coating liquid is obtained.

[0159] (10) Unroll the second substrate in the roll shape prepared in step (7) above, and uniformly spray the coating liquid prepared in step (9) above onto the surface of the unrolled second substrate; the spraying amount of the coating liquid is 32 g / m 2 The third base was obtained;

[0160] (11) The third substrate prepared in step (10) above is dried for the fourth time. The conditions for the fourth drying are drying at 85°C for 20 minutes to make the moisture content 12% and obtain the fourth substrate, which is the imitation tobacco leaf type reconstituted tobacco leaf.

[0161] (12) Using the reconstituted tobacco leaf of the imitation tobacco leaf type prepared in step (11) above as the tobacco-generating matrix, an aerosol-generating product is prepared.

[0162] Comparative Example 1

[0163] The method disclosed in Chinese Patent Document No. CN111789279A is used to prepare reconstituted tobacco leaves that resemble tobacco leaves, and these leaves are used as a smoke-generating matrix to prepare aerosol-generating products.

[0164] The specific preparation method is as follows:

[0165] (1) The plant raw materials were made by mixing tobacco stems and tobacco fragments at a mass ratio of 1:1, and then soaking them in 5 times the mass ratio of 60℃ hot water. The extraction was carried out twice by continuous countercurrent extraction, each extraction lasting 30 minutes. The solid and liquid were separated by centrifugation to obtain plant extract and plant fiber.

[0166] (2) The plant extract obtained in step (1) is filtered through 60-mesh and 300-mesh filters to remove the small plant materials remaining in it. The filtered plant extract is concentrated in a vacuum pot at a temperature of 70°C and a vacuum degree of 85kPa to a concentration of 1.15g / ml. Then, tobacco flavoring with a mass ratio of 3% is added to make a coating liquid.

[0167] (3) Add the plant fiber obtained in step (1) to room temperature water to make its concentration reach 3%, and then pulp it with a plate mill until the pulping degree is 30°SR and the wet weight is 3.0g.

[0168] (4) The wood fiber is hydraulically pulped and adjusted to a concentration of 3% for low-consistency pulping to obtain wood pulp with a freeness of 35°SR and a wet weight of 3.5g.

[0169] (5) After the sisal fiber is opened by the opening machine, it is then cut into fiber filaments of 15-25mm length by the fiber cutting machine;

[0170] (6) Dissolve sodium alginate in tap water to prepare a 0.1% adhesive solution, and allow it to swell for 4 hours before use;

[0171] (7) Mix the plant pulp prepared in step (3) and the wood pulp prepared in step (4) at a ratio of 9:1, and then add calcium carbonate at a ratio of 10% relative to the oven-dry pulp as filler to form pulp. After the pulp is flushed, it reaches the high-level box. Add a tackifier solution at the high-level box at a ratio of 5% relative to the volume of the online pulp, and then distribute it evenly to the forming wire of the long wire paper machine through the headbox.

[0172] (8) After the sisal fiber filaments prepared in step (5) are placed in the vacuum filter box of the forming mesh, they are evenly spread on the formed paper base at a ratio of 5% through a vibrating screen.

[0173] (9) After the formed paper base is vacuum pressed by the press roller, it is transferred to the drying cylinder and dried to a moisture content of about 25-35%. The coating liquid prepared in step (1) is then coated on it and dried to a moisture content of 10-12%. The paper base is then cut into thin sheets of reconstituted tobacco leaves with a size of 30×30mm.

[0174] Comparative Example 2

[0175] Aerosol-generated products were prepared using Yunnan flue-cured tobacco K326 natural tobacco leaves as the smoking matrix.

[0176] Comparative Example 3

[0177] Compared with Example 1, the difference is that this comparative example does not use segmented drying, but uses a temperature of 28°C and a wind speed of 30m / s for drying to prepare a tobacco leaf-like reconstituted tobacco leaf, which is used as a smoke-generating matrix to prepare aerosol-generated products.

[0178] Comparative Example 4

[0179] Compared with Example 1, the difference is that this comparative example does not use segmented drying, but uses a temperature of 130°C and a wind speed of 30m / s for drying to prepare a tobacco leaf-like reconstituted tobacco leaf, which is used as a smoke-generating matrix to prepare aerosol-generated products.

[0180] Test Example 1: Physical Indicator Testing

[0181] The physical properties of the reconstituted tobacco leaves prepared in Examples 1-3 and Comparative Examples 1-4, such as tensile strength, bulk thickness, leaf base weight, and appearance, were tested using existing instruments and equipment.

[0182] The results are shown in Table 1. Physical index testing shows that, compared with comparative examples 1-4, the reconstituted tobacco leaves of the simulated tobacco leaf type in Examples 1-3 have a higher basis weight, but the looseness is significantly enhanced, and the appearance is rougher with obvious wrinkles, making them closer to natural tobacco leaves; moreover, they have greater tensile strength and are not easily crushed.

[0183] Table 1. Test results of physical properties of reconstituted tobacco leaves in different embodiments and comparative examples.

[0184]

[0185] Test Example 2: Pin Sampling Test

[0186] The aerosol-generated products prepared in Examples 1-3 and Comparative Examples 1-4 were used as test samples.

[0187] Sensory evaluation experiments were conducted according to the evaluation method, and the final data were recorded. Referring to "YC / T 498-2014 Sensory Evaluation Method for Reconstituted Tobacco (Papermaking Method)", and considering the characteristics of the smoke from aerosol-generated products, key evaluation indicators were formulated, sensory evaluations were conducted, and evaluation scores were recorded according to Table 2.

[0188] Specifically, a professional evaluation panel of 5 people will score the smoke based on dimensions such as aroma (0-15 points), smoke (0-25 points), off-flavors (0-20 points), irritation (0-20 points), and taste (0-20 points), with a total score of 100 points.

[0189] The results are shown in Table 2: In Example 1, the aerosol-generated product had a strong smoke flavor, acceptable aroma, and slightly strong strength; in Example 2, the aerosol-generated product had a strong smoke flavor, rich aroma, and relatively strong strength; in Example 3, the aerosol-generated product had a relatively strong smoke flavor, acceptable aroma, and slightly strong strength; in Comparative Example 1, the aerosol-generated product had a relatively strong smoke flavor, weak aroma, and slightly strong strength; in Comparative Example 2, the aerosol-generated product had a strong smoke flavor, rich aroma, and relatively strong strength; in Comparative Example 3, the aerosol-generated product had a weak smoke flavor, acceptable aroma, and insufficient strength; and in Comparative Example 4, the aerosol-generated product had a relatively strong smoke flavor, weak aroma, and slightly strong strength.

[0190] Table 2. Appreciation test scoring table for aerosol-generated products in different embodiments and comparative examples.

[0191] Evaluation indicators aroma smoke Mixed gases Irritating Smell Total score Example 1 12 23 19 19 18 91 Example 2 13 24 19 19 19 94 Example 3 12 22 19 19 18 90 Comparative Example 1 11 22 19 18 18 88 Comparative Example 2 14 24 20 19 19 96 Comparative Example 3 12 20 18 18 18 86 Comparative Example 4 11 22 19 19 18 89

[0192] Therefore, it can be concluded that the method for preparing reconstituted tobacco leaves, the reconstituted tobacco leaves and their aerosol products provided by this patent, adopts a pulping process with lower cutting and higher fiber separation during the tobacco stem desiccation process, which can retain larger tobacco stem fibers and achieve the effect of simulating the veins of natural tobacco leaves; in the papermaking stage, boot pressing is used to increase the bulk of the reconstituted tobacco leaf substrate, which can better ensure that the coating liquid penetrates deep into the substrate in the spray coating stage; in the drying process, a segmented drying is adopted, with only circulating air introduced into the first and third stages without steam heating, and steam heating is turned on in the second stage while maintaining a high circulating hot air temperature. This high-temperature and rapid dehydration method causes obvious wrinkling of the reconstituted tobacco leaf substrate, which can restore the non-smooth state of natural tobacco leaves; the use of spray coating to load water-soluble tobacco components and flavoring substances onto the substrate can create a rougher surface appearance that is closer to natural tobacco leaves.

[0193] In the foregoing description of exemplary embodiments / specific implementations of this patent, various features of this patent are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various aspects of the invention. However, unless expressly stated otherwise or in obvious technical contradiction or exclusion, the descriptive method of this patent should not be construed as reflecting an intention that the claimed features of the invention are more than expressly stated in each claim. Rather, the inventive aspect reflected in the claims lies in not all the features of a single foregoing disclosed embodiment / specific implementation. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, each claim existing independently as a separate embodiment / specific implementation of this patent.

[0194] The terms and expressions used in this specification are for illustrative purposes and not for limitation. Their use is not intended to exclude any equivalents of the shown and described features or portions thereof, but rather to facilitate the understanding that various modifications may be possible within the scope of this patent claim. Therefore, it should be understood that while this patent has been specifically disclosed through preferred embodiments, exemplary embodiments, and optional features, variations or modifications of the concepts disclosed herein may be adopted by those skilled in the art, and such variations and modifications are therefore considered to be within the scope of this patent as defined by the appended claims. The specific embodiments given in this specification are examples of useful embodiments of this patent, and it will be apparent to those skilled in the art that this patent can be implemented using many variations of the devices, device components, and method steps disclosed herein.

[0195] The foregoing description of specific embodiments fully discloses the general features of this patent, enabling others to easily modify and / or adapt such embodiments for various applications by applying knowledge within the scope of the art, without excessive experimentation or deviation from the general concept of this patent. Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0196] Furthermore, the scope of this patent should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A reconstituted tobacco leaf model, characterized in that, The simulated tobacco leaf type reconstituted tobacco leaf is obtained by segmented drying and post-treatment of reconstituted tobacco leaf base.

2. The reconstituted tobacco leaf in the shape of a tobacco leaf according to claim 1, characterized in that, The segmented drying method includes room temperature circulating drying and high temperature circulating drying.

3. The reconstituted tobacco leaf with a tobacco leaf-like shape according to claim 2, characterized in that, The segmented drying method includes the following steps: Step S1: First stage drying: The reconstituted tobacco leaf base is dried for the first time using the room temperature circulating drying conditions to remove the surface moisture of the reconstituted tobacco leaf base and obtain the first leaf base; Step S2: Second stage drying, the first substrate is dried a second time using the high temperature cyclic drying conditions to form natural vein texture on the surface of the first substrate, thus obtaining the second substrate; Step S3: Third stage drying. The second sheet substrate is dried for the third time using the room temperature cyclic drying conditions to remove the surface moisture of the reconstituted tobacco leaf substrate, thus obtaining the third sheet substrate.

4. The reconstituted tobacco leaf in the shape of a tobacco leaf according to claim 3, characterized in that, In step S1 The temperature for the first drying step is 25–27°C, 27–30°C, or 30–32°C. The wind speed for the first drying is 30-35 m / s, 35-40 m / s, or 40-50 m / s; The first drying time is 0.2 to 1.0 min, so that the moisture content of the first substrate is 35 ± 3%.

5. The reconstituted tobacco leaf of the tobacco leaf type according to claim 3, characterized in that, In step S2 The temperature for the second drying is 120–130°C, 130–140°C, or 140–150°C. The wind speed for the second drying process is 30–35 m / s, 35–40 m / s, or 40–50 m / s. The second drying time is 0.2 to 0.8 minutes, so that the moisture content of the second substrate is 20 ± 3%.

6. The reconstituted tobacco leaf of the tobacco leaf type according to claim 3, characterized in that, In step S3 The temperature for the third drying step is 25–27°C, 27–30°C, or 30–32°C. The wind speed for the third drying process is 30–35 m / s, 35–40 m / s, or 40–50 m / s. The third drying time is 0.2 to 1.0 minutes, so that the moisture content of the third substrate is 18 ± 3%.

7. The reconstituted tobacco leaf in the shape of a tobacco leaf according to claim 1, characterized in that, The preparation of the reconstituted tobacco leaf base includes the following steps: Step A: Extract the material and separate the extract and solids; Step B: The solid material is pulped to obtain a slurry, which is then formed into the reconstituted tobacco leaf base.

8. The reconstituted tobacco leaf of the tobacco leaf type according to claim 7, characterized in that, In step A, the material includes tobacco raw material and / or outer fiber, and the mass ratio of the tobacco raw material to the outer fiber is 1:(0.2-0.3), 1:(0.3-0.4), or 1:(0.4-0.5). The tobacco raw material includes one or more of tobacco stems, tobacco dust, and fragments; the outer fiber includes bamboo fiber and / or wood pulp fiber; the wood pulp fiber includes coniferous wood and / or broadleaf wood. In step B, the wet weight of the slurry is 2.0–2.2 g, 2.2–2.4 g, or 2.4–3.0 g.

9. The reconstituted tobacco leaf in the shape of a tobacco leaf according to claim 7, characterized in that, The reconstituted tobacco leaf model also includes post-processing. The post-processing specifically involves: adding tobacco powder and flavoring to the extract, mixing them evenly to obtain a coating solution; spraying the reconstituted tobacco leaf base with the coating solution, and drying it to obtain the imitation tobacco leaf-shaped reconstituted tobacco leaf; The coating liquid is applied at a rate of 30–35 g / m². 2 35~40g / m 2 Or 40-50g / m 2 ; The drying temperature is 60-65℃, 65-75℃, or 75-85℃; the drying time is 10-20 min, 20-30 min, or 30-40 min. The moisture content of the simulated tobacco leaf reconstituted tobacco leaf is 11-12%, 12-13%, or 13-15%; the quantitative content of the simulated tobacco leaf reconstituted tobacco leaf is 90-105 g / m³. 2 .

10. An aerosol-generating product, characterized in that, The aerosol-generated product includes reconstituted tobacco leaf as described in any one of claims 1 to 9.

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