Method for preparing tobacco sheet, tobacco sheet and heated cigarette

Abstract

The invention discloses a method for preparing a tobacco sheet, the tobacco sheet and a heated cigarette, and the method comprises the following steps: step A: respectively taking a tobacco mixed raw material and an anti-sticking tobacco raw material for crushing, the size of the anti-sticking tobacco raw material is 250-270 [mu] m, 270-300 [mu] m or 300-325 [mu] m, and the size of the tobacco mixed raw material is 96-106 [mu] m, 106-150 [mu] m or 150-180 [mu] m; b, the additive and the tobacco mixed raw material are mixed, n times of rolling homogenization treatment are carried out, n is an integer larger than 2, and the second-class homogenized slices are obtained. The anti-sticking tobacco raw material is arranged, so that the surface sticking condition after high-temperature heating is avoided, the defect of preparing the tobacco sheet by a rolling method is overcome, the advantage of low production cost of the rolling method is kept, large equipment does not need to be added, waste water does not need to be treated, and the heated cigarette is rich in smoking taste, full in smoke and large in strength; the mouth feel is comfortable, and the front and back consistency is good.

Description

Technical Field

[0001] This patent belongs to the field of new tobacco technology, and specifically relates to a method for preparing tobacco sheets, tobacco sheets and heated cigarettes. Background Art

[0002] In tobacco processing, the slurry process and the rolling process are two completely different sheet reconstitution processes.

[0003] The thick pulp method is a technology that converts tobacco waste (such as tobacco ends, tobacco stems, tobacco leaf fragments, etc.) into uniform thin sheets by simulating the papermaking process. It is a wet process of pulping → forming → drying, in which tobacco raw materials and additives are mixed into a slurry, and then dehydrated and dried to form thin sheets. Its essence is to "reshape" tobacco waste into a structure similar to natural tobacco leaves, while precisely controlling the composition and combustion performance. The specific steps are to mix tobacco raw materials (fragments, tobacco ends, etc.) with water and chemical additives (such as adhesives, combustion aids) into a slurry, spread the slurry on a metal mesh belt or filter cloth, and dehydrate to form a wet film. The wet film is dried at high temperature and calendered to form uniform thin sheets, which are then cut into finished products.

[0004] Therefore, the preparation of tobacco sheets using the thick pulp method requires fine control and high equipment requirements. It requires a complete set of equipment such as pulping, sheet making, and drying. The production energy consumption is high, the wastewater treatment is complex, and supporting environmental protection facilities are required.

[0005] The roller pressing method physically compresses tobacco powder into thin sheets through mechanical rollers. This reliance on physical compression makes it suitable for low-cost production. Roller pressing is a common tobacco sheet processing method. Tobacco powder and additives are homogenized and formed using rollers before drying. This method features low processing intensity, simple equipment, and low energy consumption. When used in heated cigarettes, roller-pressed sheets can achieve a high yield and excellent tobacco flavor.

[0006] In the general roll-pressed flake production process, the tobacco raw materials (sheets, fragments, and stems) need to be crushed. In order to obtain uniform flakes, the crushing strength is relatively high, such as 100-200 mesh. After multiple rolls, a dense surface is obtained by the roll-pressed method. However, there are problems such as the surface becoming sticky after being heated at high temperatures. Due to the significant differences in the physical structure of different tobacco raw materials and the correlation with the maturity of the tobacco leaves, such as burley tobacco leaves are thick and loose in structure, oriental tobacco leaves are small and compact in structure, and flue-cured tobacco leaves are moderate; the upper part of the tobacco leaves with high maturity has a loose and porous structure. During the crushing process, high temperatures are generated. After the plant cell structure is completely broken, the aromatic substances are lost during the drying process of the flakes, and even a burnt smell is produced. Summary of the Invention

[0007] The purpose of this patent is to provide a method for preparing tobacco sheets, tobacco sheets and heated cigarettes, so as to reduce production costs, avoid surface stickiness after high-temperature heating and improve the aroma quality of tobacco sheets.

[0008] In order to solve the above technical problems, this patent adopts the following technical solutions:

[0009] A method for preparing tobacco sheets based on a roller pressing method comprises the following steps:

[0010] Step A: respectively taking a tobacco mixed raw material and an anti-sticking tobacco raw material and crushing them, wherein the size of the anti-sticking tobacco raw material is 250-270 μm, 270-300 μm or 300-325 μm, and the size of the tobacco mixed raw material is 96-106 μm, 106-150 μm or 150-180 μm;

[0011] Step B: mixing the additive with the tobacco mixed raw material, and performing roller homogenization treatment n times, where n is an integer greater than 2, to obtain a second-class homogeneous sheet;

[0012] Step C: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain tobacco sheets.

[0013] Furthermore, step C includes step C1, and step C1 includes the following steps:

[0014] Step C1-1: performing the (n+1)th roller-pressing homogenization process on the inferior homogeneous slice to obtain a first homogeneous slice;

[0015] Step C1-2: spraying or applying the first anti-sticking tobacco raw material onto the surface of the first homogeneous sheet to obtain a second homogeneous sheet;

[0016] Step C1-3: performing the roller-pressing homogenization treatment for the n+2th time on the second homogenized sheet to obtain a third homogenized sheet;

[0017] Step C1-4: The second anti-sticking tobacco raw material is adhered to the surface of the third homogeneous sheet by spraying or smearing to obtain a tobacco sheet.

[0018] Furthermore, step C includes step C2, and step C2 includes the following steps:

[0019] Step C2-1: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain a homogeneous sheet;

[0020] Step C2-2: performing the (n+1)th roller homogenization process on the homogenized sheet to obtain tobacco sheets.

[0021] Furthermore, step C includes step C3, and step C3 includes the following steps:

[0022] Step C3-1: performing the (n+1)th roller homogenization process on the inferior homogeneous slices to obtain homogeneous slices;

[0023] Step C3-2: spraying or smearing the anti-sticking tobacco raw material onto the surface of the homogenized sheet to obtain a tobacco sheet.

[0024] Furthermore, in step A, the tobacco mixed raw material includes one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco; and the anti-sticking tobacco raw material includes one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco.

[0025] Furthermore, the tobacco mixed raw material includes a first tobacco mixed raw material and a second tobacco mixed raw material. The size of the first tobacco mixed raw material is 150-180 um, and the size of the second tobacco mixed raw material is 96-106 um or 106-150 um.

[0026] Furthermore, the addition amount of the first tobacco mixed raw material is 45-48%, 48-51%, 51-54%, 54-57%, 57-60% or 60-65% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0027] Furthermore, the added amount of the second tobacco mixed raw material is 20-22%, 22-24%, 24-26%, 26-28%, 28-30% or 30-35% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0028] Furthermore, in step B, mixing the additive with the tobacco mixed raw material comprises the following steps:

[0029] Step B-1: mixing plant gum and cellulose with a tobacco mixed raw material to obtain a first mixed material;

[0030] Step B-2: adding an atomizer, water and essence to the first mixture to obtain a second mixture, which is used for n times of roller pressing homogenization treatment.

[0031] In this patent, aerosolizing agent is used to describe any suitable known compound or mixture of compounds that promotes the formation of aerosol during use and is substantially resistant to thermal degradation at the operating temperature of the heated cigarette.

[0032] Further, suitable aerosols are known in the art and include, but are not limited to, polyols such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol; esters of polyols such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosols are polyols or mixtures thereof such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and most preferably glycerol or propylene glycol.

[0033] Furthermore, the plant gum includes starch, CMC, sodium alginate and guar gum.

[0034] Furthermore, in step C, the tobacco sheet is obtained by drying at a temperature less than 105°C.

[0035] This patent further claims protection for tobacco sheets produced by any of the above-mentioned methods for preparing tobacco sheets based on the roller pressing method.

[0036] Furthermore, the amount of the anti-sticking tobacco raw material added is 0.11-0.13%, 0.13-0.15%, 0.15-0.17%, 0.17-0.20%, 0.20-0.25% or 0.25-0.30% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0037] Furthermore, the additives include plant gum, cellulose, atomizers and flavors.

[0038] Furthermore, the added amount of the plant gum is 1-2%, 2-3%, 3-4% or 4-5% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0039] Furthermore, the amount of cellulose added is 1-2%, 2-3%, 3-4%, 4-5% or 5-7% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0040] Furthermore, the amount of the atomizer added is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0041] Furthermore, the amount of flavor added is less than 5% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0042] Furthermore, the amount of water added to the first mixed material is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0043] This patent also claims protection for a heated cigarette, which includes an aerosol substrate segment and a filter rod assembly, wherein the aerosol substrate segment includes any of the tobacco sheets described above.

[0044] As used herein, the term "sheet" refers to a laminate element having a length and a width that is substantially greater than its thickness. The width of the sheet is preferably greater than 10 mm, more preferably greater than 20 mm or 30 mm. Even more preferably, the width of the sheet is comprised between about 100 mm and 300 mm.

[0045] Preferably, the tobacco sheet is a gathered textured sheet comprising homogenised tobacco material.

[0046] In this patent, gathered is used to describe a sheet of material that is rolled, folded, or compressed or shrunk substantially transversely to the longitudinal axis of the heated cigarette.

[0047] Preferably, textured sheet material refers to a sheet material that has been curled, embossed, stamped, perforated or otherwise deformed.

[0048] In this patent, a curled sheet refers to a sheet having a plurality of substantially parallel ridges or folds. Preferably, when the heated cigarette is assembled, the substantially parallel ridges or folds extend along or parallel to the longitudinal axis of the heated cigarette. This advantageously facilitates gathering the curled sheet of homogenized tobacco material to form an aerosol-forming matrix. However, it will be understood that the curled sheet of homogenized tobacco material for inclusion in a heated cigarette may alternatively or additionally have a plurality of substantially parallel ridges or folds that, when the aerosol-generating article is assembled, are arranged at acute or obtuse angles to the longitudinal axis of the heated cigarette.

[0049] Preferably, the heated cigarette can have the appearance of a traditional cigarette, including an aerosol matrix segment, a support element, and a filter segment, the filter segment typically being in the form of a filter. Cigarette articles such as cigarettes and their specifications are typically named based on the length of the cigarette, as described below. "Standard" generally refers to cigarettes ranging from 68mm to 75mm, for example, approximately 68mm to approximately 72mm in length; "Short" or "Mini" refers to cigarettes less than 68mm in length; "Oversize" generally refers to cigarettes ranging from 75mm to 91mm, for example, approximately 79mm to approximately 88mm in length; "Long" or "Extra Long" generally refers to cigarettes ranging from 91mm to 105mm, for example, approximately 94mm to approximately 101mm in length; and "Extra Long" generally refers to cigarettes ranging from approximately 110mm to approximately 121mm in length. Furthermore, cigarette articles are named based on the circumference of the cigarette, as described below. The term "standard" refers to a cigarette with an outer circumference of approximately 23mm to 25mm, "coarse" refers to a cigarette with an outer circumference of 25mm or more, "thin" refers to a cigarette with an outer circumference of approximately 22mm to 23mm, "slim" refers to a cigarette with an outer circumference of approximately 19mm to 22mm, "superfine" refers to a cigarette with an outer circumference of approximately 16mm to 19mm, and "fine" refers to a cigarette with a circumference of approximately 16mm or less. Thus, oversized and superfine cigarettes have, for example, a length of approximately 83mm and an outer circumference of approximately 17mm. Standard and oversized cigarettes, i.e., cigarettes with a length of 75mm to 91mm and an outer circumference of 23mm to 25mm, are popular with many consumers. Cigarettes of various sizes can also be manufactured with filters of different lengths. Typically, short filters are used for cigarettes with both short length and short circumference. Typically, filter lengths range from 15 mm for "short" and "standard" cigarettes to 30 mm for "extra long" and "super slim" cigarettes. The tipping paper in the longitudinal direction of the filter-tipped cigarette is longer than the filter, for example, 3 to 10 mm.

[0050] Optionally, the heated cigarette element is surrounded by an outer wrapper. The outer wrapper is formed from any suitable material or combination of materials. Preferably, the outer wrapper is cigarette paper.

[0051] Preferably, an aerosol generating device is used to describe a device that interacts with the aerosol matrix of a heated cigarette to generate an aerosol, wherein the aerosol matrix is a tobacco sheet prepared based on the roller pressing method in this patent, and the aerosol generating device is a smoking device that interacts with the tobacco sheet of a heated cigarette to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth.

[0052] This patent provides a method for preparing tobacco sheets, tobacco sheets and heated cigarettes. By arranging anti-stick tobacco raw materials, it avoids the surface sticking after high-temperature heating, solves the defects of preparing tobacco sheets by roller pressing, and maintains the low production cost advantage of roller pressing, without the need to purchase large equipment and treat wastewater. The heated cigarettes prepared by the tobacco sheets of this patent have a rich aroma and flavor when smoked, full smoke, strong power, comfortable taste, and good consistency. In addition, this patent improves the filling performance of the sheets prepared by the roller pressing method, avoids the easy sticking of the surface of the relatively dense sheets, and combines the thickness requirements of the prepared sheets to differentiate the crushing mesh or strength of different types of tobacco raw materials (flue-cured tobacco, burley tobacco, cigar tobacco and / or spice tobacco) and the physical structural characteristics of different parts of the tobacco raw materials to achieve better homogenization, carry out tobacco powder application in groups, and improve the comprehensive performance of the sheets prepared by the roller pressing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The above content of this patent and the following specific embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are only examples of the technical solutions claimed.

[0054] Figure 1 This is a schematic diagram of the structure of the heated cigarette in this patent;

[0055] Figure 2 This is a schematic diagram of the process of Example 1 in this patent;

[0056] Figure 3 This is a schematic diagram of the process of Example 2 in this patent;

[0057] Figure 4 This is a schematic diagram of the process of Example 3 in this patent.

[0058] The description of the accompanying drawings is as follows:

[0059] Heated cigarettes: 100

[0060] Filter segment: 110

[0061] Support element: 120

[0062] Aerosol matrix segment: 130 DETAILED DESCRIPTION

[0063] The detailed features and advantages of this patent are described in detail below in the specific implementation method. The content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0064] This patent provides a method for preparing tobacco sheets based on a roller pressing method, comprising the following steps:

[0065] Step A: respectively taking a tobacco mixed raw material and an anti-sticking tobacco raw material and crushing them, wherein the size of the anti-sticking tobacco raw material is 250-270um, 270-300um or 300-325um, and the size of the tobacco mixed raw material is 96-106um, 106-150um or 150-180um.

[0066] The tobacco blended raw materials include one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco.

[0067] Specifically, the anti-sticking tobacco raw material includes one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco;

[0068] Step B: mixing the additive with the tobacco mixed raw material, and performing roller homogenization treatment n times, where n is an integer greater than 2, to obtain a second-class homogeneous sheet;

[0069] Step C: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain tobacco sheets.

[0070] The corresponding relationship between the size of tobacco raw materials and the sieve mesh number is shown in Table 1.

[0071] Table 1: Comparison table of tobacco blend raw materials and anti-sticking tobacco raw materials size and sieve mesh number

[0072]

[0073]

[0074] Specifically, step C includes step C1, and step C1 includes the following steps:

[0075] Step C1-1: performing the (n+1)th roller-pressing homogenization process on the inferior homogeneous slice to obtain a first homogeneous slice;

[0076] Step C1-2: spraying or applying the first anti-sticking tobacco raw material onto the surface of the first homogeneous sheet to obtain a second homogeneous sheet;

[0077] Step C1-3: performing the roller-pressing homogenization treatment for the n+2th time on the second homogenized sheet to obtain a third homogenized sheet;

[0078] Step C1-4: The second anti-sticking tobacco raw material is adhered to the surface of the third homogeneous sheet by spraying or smearing to obtain a tobacco sheet.

[0079] Specifically, step C includes step C2, and step C2 includes the following steps:

[0080] Step C2-1: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain a homogeneous sheet;

[0081] Step C2-2: performing the (n+1)th roller homogenization process on the homogenized sheet to obtain tobacco sheets.

[0082] Specifically, step C includes step C3, and step C3 includes the following steps:

[0083] Step C3-1: performing the (n+1)th roller homogenization process on the inferior homogeneous slices to obtain homogeneous slices;

[0084] Step C3-2: spraying or smearing the anti-sticking tobacco raw material onto the surface of the homogenized sheet to obtain a tobacco sheet.

[0085] Specifically, in step A, the tobacco mixed raw material includes a first tobacco mixed raw material and a second tobacco mixed raw material, the size of the first tobacco mixed raw material is 150-180 μm, and the size of the second tobacco mixed raw material is 96-106 μm or 106-150 μm. More specifically, the addition amount of the first tobacco mixed raw material is 45-48%, 48-51%, 51-54%, 54-57%, 57-60% or 60-65% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material. The addition amount of the second tobacco mixed raw material is 20-22%, 22-24%, 24-26%, 26-28%, 28-30% or 30-35% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0086] Specifically, in step B, mixing the additive with the tobacco mixed raw material includes the following steps:

[0087] Step B-1: mixing plant gum and cellulose with a tobacco mixed raw material to obtain a first mixed material;

[0088] Step B-2: Adding atomizer, water, and flavor to the first mixture to obtain a second mixture, which is then subjected to n roller-pressing homogenization processes. In step B, mixing the additive with the tobacco mixture comprises the following steps:

[0089] Step B-1: mixing plant gum and cellulose with a tobacco mixed raw material to obtain a first mixed material;

[0090] Step B-2: adding an atomizer, water and essence to the first mixture to obtain a second mixture, which is used for n times of roller pressing homogenization treatment.

[0091] Specifically, in step C, the tobacco sheet is prepared by drying at a drying temperature less than 105°C.

[0092] Specifically, the amount of the anti-sticking tobacco raw material added is 0.11-0.13%, 0.13-0.15%, 0.15-0.17%, 0.17-0.20%, 0.20-0.25% or 0.25-0.30% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

[0093] Specifically, the additives include plant gum, cellulose, atomizer and flavor. The amount of plant gum added is 1-2%, 2-3%, 3-4% or 4-5% of the total amount of the tobacco mixed raw materials and the anti-sticking tobacco raw materials; the amount of cellulose added is 1-2%, 2-3%, 3-4%, 4-5% or 5-7% of the total amount of the tobacco mixed raw materials and the anti-sticking tobacco raw materials; the amount of atomizer added is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw materials and the anti-sticking tobacco raw materials; the amount of flavor added is less than 5% of the total amount of the tobacco mixed raw materials and the anti-sticking tobacco raw materials, and the amount of water added to the first mixture is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw materials and the anti-sticking tobacco raw materials.

[0094] Specifically, tobacco raw materials of different grades and types are evaluated for appearance maturity and leaf structure based on their composition. Appearance maturity and leaf structure evaluation primarily assess the looseness of the tobacco leaves, referring to standards such as GB2635 and GB8966. Microscopic imaging can be used to observe the thickness of the tobacco leaves, if necessary.

[0095] Specifically, the particle size is determined according to the leaf structure caused by the tobacco raw material type, part, appearance maturity, etc., among which a lower particle size is selected for tobacco with better maturity, thicker thickness and looser structure. Appropriate crushing process conditions are selected first, and then group crushing is carried out.

[0096] Specifically, the tobacco raw material is dried and pre-treated to a moisture content of 8%±1% before pulverization. The small-sized tobacco powder (i.e., tobacco mixed raw material, mesh size ≥80) after the pulverization process is pre-mixed through stirring and other pre-mixing processes, and then homogenized with dry materials such as a binder and additional fiber, and wet materials such as an atomizer, flavoring, and water.

[0097] Specifically, the sheet is rolled and homogenized multiple times according to the roller pressing process. Before or after the last rolling, the large-sized tobacco powder (i.e., anti-sticking tobacco raw material, mesh size of about 50) that has been processed by the pulverization process is sprayed or applied to the surface of the sheet. If the tobacco powder that can pass through a 100-250 mesh sieve is sprayed, the particle size of the tobacco powder is too small, and the surface roughness of the sheet after or without rolling is relatively insufficient, and the effect of reducing thermal adhesion is not ideal. More specifically, the weight proportion of tobacco with a mesh size of less than 50 is less than 1% of the total amount of tobacco. Preferably, the weight of tobacco with a mesh size greater than 150 is controlled to be less than 5% of the total amount of tobacco.

[0098] Specifically, the surface drying and processing of the above-mentioned thin slices obtains improved roller-pressed thin slices, and the aroma quality and concentration are significantly improved and improved compared to the roller-pressing method with a single pulverization process. Large-sized tobacco particles are attached to the surface, increasing the surface roughness and gaps to avoid sticking when heated. More specifically, the addition amount of small-sized tobacco powder (tobacco mixed raw material) larger than 50 mesh is 10% to 20% of the total amount; the design is optimized based on the process's addable range and the thin slice's carrying capacity for tobacco powder. The proportion of sprayed tobacco particles has an impact on the characteristic aroma of tobacco. The higher the proportion, the more prominent the characteristic aroma. For example, the sprayed burley tobacco and sun-cured tobacco have a relatively high proportion of 20%, and the sun-cured tobacco aroma in the characteristic aroma of the thin tobacco is relatively prominent. The pulverization mesh corresponding to different tobacco leaf raw materials is shown in Table 2.

[0099] Table 2: Suitable crushing mesh size for different tobacco raw materials

[0100]

[0101] like Figure 1 As shown, the present patent further provides a heated cigarette 100, which includes an aerosol matrix segment 130 and a filter rod assembly. The aerosol matrix segment 130 includes any of the tobacco sheets described above. The filter rod assembly includes a filter segment 110 and a support element 120. The filter segment 110, the support element 120 and the aerosol matrix segment 130 are arranged in sequence from the mouth-proximal end.

[0102] In order to further illustrate the technical solution of this patent, Examples 1 to 3 are given below for detailed description.

[0103] Example 1

[0104] Taking roller-pressed sheet A as an example, the overall quality is flue-cured tobacco style. The main raw material composition is shown below. Flue-cured tobacco raw material is crushed to 80-100 mesh for the upper part and 100-150 mesh for the middle part, depending on the part. Sun-cured tobacco raw material is crushed to 50-80 mesh. The tobacco raw material composition is shown in Table 3.

[0105] Table 3: Composition and pulverization of tobacco raw materials for roller-pressed sheet A

[0106]

[0107] like Figure 2As shown, A1, A2, and A3 are first ground according to the pulverization requirements in Table 3 and then mixed to obtain A1-A3. A4 is then ground and set aside. A1-A3 are then mixed with tobacco, 3% plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% cellulose to obtain a first mixture. To the first mixture, 25%-35% atomizer (glycerin / propylene glycol), 30% water, and flavoring (<5%) are then added and mixed homogenously to obtain a second mixture. After the second mixed material is rolled multiple times, A4 tobacco powder is evenly sprayed on the surface of the sheet before and after the last rolling method according to a certain proportion. That is, the anti-sticking tobacco raw material A4 is evenly divided into the first anti-sticking tobacco raw material and the second anti-sticking tobacco raw material according to its added amount. The first anti-sticking tobacco raw material is sprayed after the n+1th rolling homogenization treatment, and the second anti-sticking tobacco raw material is sprayed after the n+2th rolling homogenization treatment. After drying (<105°C), the improved rolling method sheet A is prepared.

[0108] Comparative Example A-1

[0109] The composition of the tobacco raw materials of this comparative example is shown in Table 4.

[0110] Table 4: Composition and pulverization of tobacco raw materials of roller-pressed sheet A-1

[0111] raw material Proportion Maturity Crushing mesh Flue-cured tobacco upper fragments A1 25 Mature 80-100 Flue-cured tobacco upper part A2 25 Mature 80-100 Flue-cured tobacco middle A3 25 Mature 80-100 A4 size fragment of the middle part of sun-dried tobacco 25 Mature 80-100

[0112] Tobacco raw materials were ground and mixed according to the pulverization requirements in Table 4 to obtain a pulverized sample. The pulverized sample was mixed with 3% tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% cellulose to obtain a first mixture. The first mixture was then added with 25%-35% atomizer (glycerin / propylene glycol), 30% water, and flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to produce roller-pressed sheet A-1.

[0113] Comparative Example A-2

[0114] The composition of the tobacco raw materials of this comparative example is shown in Table 5.

[0115] Table 5: Composition and pulverization of tobacco raw materials for roller-pressed sheet A-2

[0116] raw material Proportion Maturity Crushing mesh Flue-cured tobacco upper fragments A1 25 Mature 100-150 Flue-cured tobacco upper part A2 25 Mature 100-150 Flue-cured tobacco middle A3 25 Mature 100-150 A4 middle fragment of sun-dried yellow tobacco 25 Mature 100-150

[0117] Tobacco raw materials were ground and mixed according to the pulverization requirements in Table 5 to obtain a pulverized sample. The pulverized sample was mixed with 3% tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% cellulose to obtain a first mixture. The first mixture was then added with 25%-35% atomizer (glycerin / propylene glycol), 30% water, and flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to produce roller-pressed sheet A-2.

[0118] The roll-pressed sheet A prepared in Example 1 was compared with the sheets A-1 and A-2 prepared in Comparative Examples A-1 and A-2, respectively, using a single pulverization process, to prepare heated cigarettes for evaluation. Although the overall evaluation was superior, the aroma quality was different. The results are shown in Table 6.

[0119] Table 6: Comparative evaluation table of roller pressing sheet A

[0120]

[0121] Example 2

[0122] Taking roller-pressed sheet B as an example, the overall quality is a blended tobacco style. The main raw material composition is shown below. The grinding mesh requirement for burley and sun-cured tobacco raw materials is 50-80 mesh, the grinding mesh requirement for upper flue-cured tobacco raw materials is 80-100 mesh, and the grinding mesh requirement for middle flue-cured tobacco is 100-150 mesh. The tobacco raw material composition is shown in Table 7.

[0123] Table 7: Raw material composition and pulverization of roller compaction flakes B

[0124] raw material Proportion Maturity Crushing mesh Burley tobacco upper fragments B1 (first tobacco blending material) 15 Mature 80 Burley upper B2 (anti-sticking tobacco raw material) 15 ripe 50 Flue-cured tobacco middle B3 (second tobacco blending raw material) 20 Mature 100-150 Flue-cured tobacco upper part B4 (first tobacco blending raw material) 20 ripe 80-100 Sun-cured tobacco middle fragments B5 (first tobacco blending raw material) 20 Mature 80 Oriental tobacco chips B6 (second tobacco blend) 10 / 100-150

[0125] like Figure 3 As shown, according to the above-mentioned pulverization requirements, B1, B3, B4, B5, and B6 are first ground according to the pulverization requirements in Table 5 and then mixed to obtain B1 and B3-B6. B2 is ground and set aside. 3% of tobacco, plant gum (starch, CMC, sodium alginate, guar gum, etc.) and 3%-5% of added cellulose are mixed with B1, B3-B6 to obtain a first mixture. 25%-35% of atomizer (glycerol / propylene glycol), 30% of water, and flavor (<5%) are added to the first mixture and then mixed and homogenized to obtain a second mixture. After the second mixture is rolled multiple times, B2 tobacco powder is sprayed on the surface of the sheet according to the proportion before the final roll-pressing process (i.e., the n+1th roll-pressing homogenization process). After drying (<105°C), the improved roll-pressed sheet B is prepared.

[0126] Comparative Example B-3

[0127] The composition of the tobacco raw materials of this comparative example is shown in Table 8.

[0128] Table 8: Composition and pulverization of tobacco raw materials for roller-pressed sheet B-3

[0129] raw material Proportion Maturity Crushing mesh Burley tobacco upper fragments B1 15 Mature 50-80 Burley upper B2 15 ripe 50-80 Flue-cured tobacco middle B3 20 Mature 50-80 Flue-cured tobacco upper B4 20 ripe 50-80 Sun-cured tobacco middle fragment B5 20 Mature 50-80 Spicy tobacco chips B6 10 / 50-80

[0130] Tobacco raw materials were ground and mixed according to the pulverization requirements in Table 8 to obtain a pulverized sample. The pulverized sample was mixed with 3% tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% cellulose to obtain a first mixture. The first mixture was then added with 25%-35% atomizer (glycerin / propylene glycol), 30% water, and flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to produce roller-pressed sheet B-3.

[0131] Comparative Example B-4

[0132] The composition of the tobacco raw materials of this comparative example is shown in Table 9.

[0133] Table 9: Composition and pulverization of tobacco raw materials for roller-pressed sheet B-4

[0134] raw material Proportion Maturity Crushing mesh Burley tobacco upper fragments B1 15 Mature 100-150 Burley upper B2 15 ripe 100-150 Flue-cured tobacco middle B3 20 Mature 100-150 Flue-cured tobacco upper B4 20 ripe 100-150 Sun-cured tobacco middle fragment B5 20 Mature 100-150 Spicy tobacco chips B6 10 / 100-150

[0135] Tobacco raw materials were ground and mixed according to the pulverization requirements in Table 9 to obtain a pulverized sample. The pulverized sample was mixed with 3% tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% cellulose to obtain a first mixture. The first mixture was then added with 25%-35% atomizer (glycerin / propylene glycol), 30% water, and flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to produce roller-pressed sheet B-4.

[0136] The roller-pressed sheet B prepared in Example 2 and the sheets B-3 and B-4 prepared in Comparative Examples B-3 and B-4 respectively using a single pulverization process were prepared into heated cigarettes for comparative sensory quality evaluation. The results are shown in Table 10.

[0137] Table 10: Comparative evaluation table of roller pressing sheet B

[0138]

[0139] Example 3

[0140] Taking roller-pressed sheet C as an example, the overall quality is cigar-like. The main raw material composition is shown below: Cigar and sun-cured tobacco raw materials are ground to a mesh size of 50-80, flue-cured tobacco upper parts are ground to a mesh size of 80-100, and middle parts to a mesh size of 100-150, and oriental tobacco chips are ground to a mesh size of 100-150. The tobacco raw material composition is shown in Table 11.

[0141] Table 11: Raw material composition and pulverization of roller compaction flakes C

[0142] raw material Proportion Maturity Crushing mesh Cigar scraps C1 (first tobacco blend) 20 Mature 80 Cigar scraps C2 (anti-stick tobacco raw material) 20 ripe 50 Flue-cured tobacco upper C3 (second tobacco blending raw material) 20 Mature 100-150 Flue-cured tobacco upper C4 (first tobacco blending raw material) 20 ripe 80-100 Sun-cured tobacco middle fragments C5 (first tobacco blending raw material) 10 Mature 80 Oriental tobacco chips C6 (second tobacco blending raw material) 10 / 100-150

[0143] like Figure 4 As shown, according to the above-mentioned pulverization requirements, C1, C3, C4, C5, and C6 are first ground according to the pulverization requirements and then mixed to obtain C1-6. C2 is pulverized and set aside. 3% of tobacco, plant gum (starch, CMC, sodium alginate, guar gum, etc.) and 3%-5% of added cellulose are mixed with C1-6 to obtain a first mixture. 25%-35% of atomizer (glycerol / propylene glycol), 30% of water, and flavor (<5%) are added to the first mixture and then mixed and homogenized to obtain a second mixture. After the second mixture is rolled multiple times, C2 tobacco powder is sprayed on the surface of the sheet according to the proportion before the final roll-pressing process (i.e., the n+1th roll-pressing homogenization process). After drying (<105°C), the improved roll-pressed sheet C is prepared.

[0144] Comparative Example C-5

[0145] The composition of the tobacco raw materials of this comparative example is shown in Table 12.

[0146] Table 12: Composition and pulverization of tobacco raw materials for roller-pressed sheet C-5

[0147] raw material Proportion Maturity Crushing mesh Cigar fragments C1 20 Mature 50-80 Cigar fragments C2 20 ripe 50-80 Flue-cured tobacco upper C3 20 Mature 50-80 Flue-cured tobacco upper C4 20 ripe 50-80 Sun-cured tobacco middle fragment C5 10 Mature 50-80 Spicy tobacco fragments C6 10 / 50-80

[0148] The tobacco raw material was ground and mixed according to the pulverization requirements in Table 12 to obtain a pulverized sample. The pulverized sample was mixed with 3% of tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% of cellulose to obtain a first mixture. The first mixture was then added with 25%-35% of an atomizer (glycerin / propylene glycol), 30% of water, and a flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to obtain roller-pressed sheet C-5.

[0149] Comparative Example C-6

[0150] The composition of the tobacco raw materials of this comparative example is shown in Table 13.

[0151] Table 13: Composition and pulverization of tobacco raw materials for roller-pressed sheet C-6

[0152] raw material Proportion Maturity Crushing mesh Cigar fragments C1 20 Mature 100-150 Cigar fragments C2 20 ripe 100-150 raw material Proportion Maturity Crushing mesh Flue-cured tobacco upper C3 20 Mature 100-150 Flue-cured tobacco upper C4 20 ripe 100-150 Sun-cured tobacco middle fragment C5 10 Mature 100-150 Spicy tobacco fragments C6 10 / 100-150

[0153] The tobacco raw material was ground and mixed according to the pulverization requirements in Table 13 to obtain a pulverized sample. The pulverized sample was mixed with 3% of tobacco, a plant gum (starch, CMC, sodium alginate, guar gum, etc.), and 3%-5% of cellulose to obtain a first mixture. The first mixture was then added with 25%-35% of an atomizer (glycerin / propylene glycol), 30% of water, and a flavor (<5%), followed by homogenization to obtain a second mixture. The second mixture was subjected to multiple roller pressing and then dried (<105°C) to produce roller-pressed sheet C-6.

[0154] The roller-pressed sheet C prepared in Example 1 and the sheets C-5 and C-6 prepared in Comparative Examples C-5 and C-6 respectively using a single pulverization process were prepared into heated cigarettes for comparative sensory quality evaluation. The results are shown in Table 14.

[0155] Table 14: Comparative evaluation table of roller pressed sheet C

[0156]

[0157] Compared with the existing technology, this patent provides an improved roller-pressed tobacco sheet crushing and processing process. Through the differences in the microscopic physical structure of different tobacco leaf raw materials, the appropriate crushing particle size process is selected to reduce the adaptability differences of different raw materials caused by a single crushing process, and avoid the quality problems of residual impurities and hot stickiness of the sheets. This patent specifically solves the defects of preparing tobacco sheets by the roller pressing method by arranging anti-stick tobacco raw materials, thereby avoiding surface stickiness after high-temperature heating, and maintaining the low production cost advantage of the roller pressing method. There is no need to purchase large-scale equipment or treat wastewater. The heated cigarettes prepared by the tobacco sheets of this patent have a rich aroma, full smoke, strong power, comfortable taste, and good consistency. In addition, this patent improves the filling performance of roller-pressed sheets to avoid the stickiness of the relatively dense sheet surface. Combined with the thickness requirements of the prepared sheets, the physical structure characteristics of different types of tobacco raw materials (flue-cured tobacco, burley tobacco, cigars and / or oriental tobacco) and different parts of tobacco raw materials are differentiated by their crushing mesh or strength to achieve better homogenization, and tobacco powder is applied in groups to improve the comprehensive performance of roller-pressed sheets.

[0158] The terms and expressions used herein are for descriptive purposes only, and this patent should not be limited to these terms and expressions. The use of these terms and expressions does not exclude any equivalent features of the illustrations and descriptions (or portions thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions are also possible. Accordingly, the claims should be deemed to cover all such equivalents.

[0159] Similarly, it should be pointed out that although this patent has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate this patent, and various equivalent changes or substitutions can be made without departing from the spirit of this patent. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of this patent, they will fall within the scope of the claims of this patent.

Claims

1. A method for preparing tobacco sheets based on a roller pressing method, characterized in that: The following steps are involved: Step A: respectively taking a tobacco mixed raw material and an anti-sticking tobacco raw material and crushing them, wherein the size of the anti-sticking tobacco raw material is 250-270 μm, 270-300 μm or 300-325 μm; the size of the tobacco mixed raw material is 96-106 μm, 106-150 μm or 150-180 μm; Step B: mixing the additive with the tobacco mixed raw material, and performing roller homogenization treatment n times, where n is an integer greater than 2, to obtain a second-class homogeneous sheet; Step C: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain the tobacco sheet.

2. The method for preparing tobacco sheets according to claim 1, wherein The step C includes step C1, and the step C1 includes the following steps: Step C1-1: performing the (n+1)th roller-pressing homogenization process on the inferior homogeneous slice to obtain a first homogeneous slice; Step C1-2: spraying or applying the first anti-sticking tobacco raw material onto the surface of the first homogeneous sheet to obtain a second homogeneous sheet; Step C1-3: performing the n+2th roller-pressing homogenization process on the second homogeneous sheet to obtain a third homogeneous sheet; Step C1-4: spraying or smearing the second anti-sticking tobacco raw material onto the surface of the third homogeneous sheet to obtain the tobacco sheet.

3. The method for preparing tobacco sheets according to claim 1, wherein The step C includes step C2, and the step C2 includes the following steps: Step C2-1: spraying or smearing the anti-sticking tobacco raw material onto the surface of the inferior homogeneous sheet to obtain a homogeneous sheet; Step C2-2: performing the (n+1)th roller homogenization process on the homogenized sheet to obtain the tobacco sheet.

4. The method for preparing tobacco sheets according to claim 1, wherein The step C includes step C3, and the step C3 includes the following steps: Step C3-1: performing the (n+1)th roller-pressing homogenization process on the inferior homogeneous slices to obtain homogeneous slices; Step C3-2: The anti-sticking tobacco raw material is adhered to the surface of the homogeneous sheet by spraying or smearing to obtain the tobacco sheet.

5. The method for preparing tobacco sheets according to claim 1, wherein In step A, the tobacco mixed raw material includes one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco; the anti-sticking tobacco raw material includes one or more of burley tobacco, sun-cured tobacco, cigar tobacco, flue-cured tobacco, and oriental tobacco; The tobacco mixed raw material includes a first tobacco mixed raw material and a second tobacco mixed raw material, the size of the first tobacco mixed raw material is 150-180 μm, and the size of the second tobacco mixed raw material is 96-106 μm or 106-150 μm; In the step B, mixing the additive with the tobacco mixed raw material comprises the following steps: Step B-1: mixing plant gum and cellulose with the tobacco mixed raw material to obtain a first mixed material; Step B-2: adding an atomizer, water and essence to the first mixture to obtain a second mixture, and the second mixture is used for the n-time roller pressing homogenization treatment.

6. The method for preparing tobacco sheets according to claim 5, characterized in that: In the step C, the tobacco sheet is prepared by drying, and the drying temperature is less than 105°C.

7. A tobacco sheet produced according to the method for producing tobacco sheets based on a roller pressing method according to any one of claims 1 to 6.

8. The tobacco sheet according to claim 7, wherein The added amount of the anti-sticking tobacco raw material is 0.11-0.13%, 0.13-0.15%, 0.15-0.17%, 0.17-0.20%, 0.20-0.25% or 0.25-0.30% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

9. The tobacco sheet according to claim 8, characterized in that The additives include plant gum, cellulose, atomizer and flavor. The amount of plant gum added is 1-2%, 2-3%, 3-4% or 4-5% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material. The amount of cellulose added is 1-2%, 2-3%, 3-4%, 4-5% or 5-7% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material; The amount of the atomizer added is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material; The amount of flavor added is less than 5% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material. The amount of water added to the first mixed material is 20-25%, 25-30%, 30-35% or 35-40% of the total amount of the tobacco mixed raw material and the anti-sticking tobacco raw material.

10. A heated cigarette comprising an aerosol matrix segment and a filter rod assembly, characterized in that: The aerosol substrate segment comprises the tobacco sheet according to any one of claims 7 to 9.

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