Method for manufacturing reconstituted tobacco through thick slurry method, reconstituted tobacco through thick slurry method and aerosol generating product

Abstract

The invention belongs to the technical field of tobacco, and particularly relates to a method for manufacturing reconstituted tobacco through a thick slurry method, the reconstituted tobacco through the thick slurry method and an aerosol generating product. The invention provides a method for manufacturing reconstituted tobacco through a thick slurry method. The method comprises the following steps that A, reconstituted tobacco slurry containing a cross-linked essence and fragrance carrier is prepared; and B, the reconstituted tobacco slurry is subjected to tape casting, spreading and forming, and the reconstituted tobacco is obtained after drying and shaping. The cross-linked carrier generated by the reaction of cyclodextrin and binary acid is a better carrier for the tobacco flavor and perfume, has a loading rate higher than that of a traditional carrier (such as beta-cyclodextrin), also has better thermal stability, and is not easy to decompose during heating. As the thick slurry method inevitably needs a high-temperature drying step, the essence and fragrance carrier with good thermal stability can significantly improve the loading effect of the essence and fragrance in the product. The invention also provides the reconstituted tobacco and the aerosol generating product prepared by the method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tobacco, and particularly relates to a method for manufacturing reconstituted tobacco leaves by a thick slurry method, reconstituted tobacco leaves by the thick slurry method, and an aerosol generating article. BACKGROUND

[0002] Heat-not-burn cigarettes have become an important substitute for traditional cigarettes due to their harm reduction characteristics. Thick slurry method cigarette sheet, as one of the heat-not-burn cigarette raw materials, has obvious advantages of high flavor load and processing resistance compared with roll-press method, paper-making method and dry method cigarette sheet. At the same time, it has excellent sensory smoking quality, resulting in a higher and higher proportion of its use in heat-not-burn cigarettes, and it is also recognized in the tobacco industry that thick slurry method cigarette sheet will be the core raw material in heat-not-burn cigarettes. Therefore, higher and higher requirements are put forward for the production stability of thick slurry method cigarette sheet.

[0003] However, there are still significant defects in the preparation of reconstituted tobacco leaves by the thick slurry method: first, the high-temperature drying step (90-120℃) can cause a flavor loss rate as high as 20-40%, and the sensory quality decreases; second, the traditional carrier (such as porous starch) has limited inclusion capacity and is easily decomposed at high temperatures, resulting in low flavor load efficiency. SUMMARY

[0004] The purpose of the present application is to improve the flavor load effect of thick slurry method reconstituted tobacco leaves. To solve this technical problem:

[0005] The first aspect of the present application provides a method for manufacturing reconstituted tobacco leaves by a thick slurry method, comprising the following steps:

[0006] Step A: preparing a reconstituted tobacco leaf slurry containing a cross-linked flavor carrier;

[0007] Step B: casting and spreading the reconstituted tobacco leaf slurry into a shape, and obtaining the reconstituted tobacco leaves after drying and setting.

[0008] Further, the cross-linked flavor carrier refers to a cross-linked carrier loaded with flavor.

[0009] Further, the cross-linked carrier is prepared by esterification reaction of cyclodextrin and dibasic acid.

[0010] Further, the cyclodextrin includes at least one of beta-cyclodextrin, alpha-cyclodextrin, gamma-cyclodextrin and hydroxypropyl-beta-cyclodextrin.

[0011] Further, the dibasic acid is selected from at least one of fumaric acid, malic acid, malonic acid, citric acid and succinic acid.

[0012] Further, the esterification reaction comprises the following steps: dissolving the cyclodextrin and the dibasic acid, adding a catalyst, and reacting at 60-70℃ for 2-4h, and then filtering and drying to obtain the crosslinked carrier.

[0013] Further, the mass retention rate of the crosslinked carrier after heating at 160℃ for 4h is not less than 68.2%, 75.4%, 82.1%, or 95.3%.

[0014] Further, step A comprises:

[0015] Step A-1: crushing the tobacco material to obtain crushed tobacco material;

[0016] Step A-2: emulsifying the paper pulp fibers and the atomizing agent to obtain a mixed emulsion;

[0017] Step A-3: gelatinizing the crosslinked carrier and water to obtain a crosslinked sol;

[0018] Step A-4: mixing the crushed tobacco material, the mixed emulsion, the crosslinked sol, inorganic filler, essence and spices, and water to obtain a reconstituted tobacco leaf slurry.

[0019] Further, the emulsification temperature in step A-2 is 40-60℃, and the emulsification time is 0.5-2h.

[0020] Further, the gelatinization temperature in step A-3 is 60-90℃, and the gelatinization time is 0.5-2h.

[0021] Further, step B comprises: spreading and forming the slurry on a metal receiving object by flow casting, and then drying and setting to obtain the thick slurry method reconstituted tobacco leaf.

[0022] Further, the surface temperature of the metal receiving object is 90-120℃.

[0023] Further, the drying and setting is hot air drying, and the hot air temperature is 90-120℃.

[0024] The second aspect of the present application provides a thick slurry method reconstituted tobacco leaf prepared by the method for manufacturing a reconstituted tobacco leaf described above.

[0025] The third aspect of the present application provides an aerosol generating article comprising the thick slurry method reconstituted tobacco leaf described above.

[0026] The thick slurry method is a method for forming a heating cigarette special-purpose sheet or other aerosol generating substrate by mixing tobacco powder, a smoking agent, an adhesive, fibers, etc. to form a slurry and then coating the slurry to form a sheet.

[0027] A sheet for heated cigarettes is an aerosol-forming substrate for use in an aerosol-generating article. In this context, an aerosol-generating article is a smoking article comprising an aerosol-forming substrate which generates an aerosol by heating which is directly inhalable by a user into the lungs of the user through the mouth of the user.

[0028] Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate can comprise both solid and liquid components.

[0029] Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco.

[0030] For example, the aerosol-forming material can be formed from a sheet of homogenised tobacco.

[0031] Alternatively or additionally, the aerosol-forming substrate can comprise aerosol-forming material which does not comprise tobacco. For example, the aerosol-forming material can be a sheet comprising a nicotine salt and an aerosol-former.

[0032] In this patent, a slurry preferably comprises homogenised tobacco material, which means material formed by agglomerating particulate tobacco.

[0033] As used herein, the term "sheet" means a laminar element having a length and a length substantially greater than its thickness. The width of the sheet is preferably greater than 10 millimetres, more preferably greater than 20 millimetres or 30 millimetres. Even more preferably, the width of the sheet is comprised between about 100 millimetres and 300 millimetres.

[0034] In this patent, agglomerated is used to describe a sheet material that is rolled, folded or compressed or shrunk substantially transverse to the longitudinal axis of the aerosol-generating article.

[0035] Preferably, the aerosol-forming substrate comprises an agglomerated textured sheet of homogenised tobacco material.

[0036] In this patent, a textured sheet means a sheet that has been crimped, embossed, impressed, perforated or otherwise deformed. The aerosol-forming substrate can comprise an agglomerated textured sheet of homogenised tobacco material comprising a plurality of spaced apart notches, protrusions, perforations or combinations thereof. Preferably, the aerosol-forming substrate comprises an agglomerated crimped sheet of homogenised tobacco material. The use of a textured sheet of homogenised tobacco material can advantageously facilitate the agglomeration of the sheet of homogenised tobacco material to form the aerosol-forming substrate.

[0037] In the present patent, a crimped sheet means a sheet having a plurality of substantially parallel ridges or corrugations. Preferably, the substantially parallel ridges or corrugations extend along or parallel to the longitudinal axis of the heated cigarette when the heated cigarette has been assembled. This advantageously facilitates the gathering of the crimped sheet of homogenised tobacco material to form the aerosol-forming substrate. However, it will be appreciated that the crimped sheet of homogenised tobacco material for inclusion in a heated cigarette can alternatively or additionally have a plurality of substantially parallel ridges or corrugations arranged at an acute or obtuse angle to the longitudinal axis of the heated cigarette when the aerosol-generating article has been assembled.

[0038] Optionally, the elements of the heated cigarette are 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.

[0039] Preferably, the aerosol-generating device is a smoking device that interacts with the aerosol substrate of the heated cigarette to generate an aerosol that is directly inhalable by a user's mouth into the user's lungs.

[0040] The present invention is beneficial at least in that:

[0041] 1. The β-cyclodextrin structure with "external hydrophilic, internal hydrophobic" is introduced as a functional carrier; based on molecular structure design and interface modification technology, esterification cross-linking reaction is carried out with binary acid such as succinic acid, so that the hydroxyl sites of β-cyclodextrin form stable covalent bond with exogenous fibers and adhesive components in the reconstituted tobacco leaf, and the loading capacity of spices is improved by the embedding effect.

[0042] 2. Advantageously, the applicant found that the cross-linked carrier produced by the reaction of cyclodextrin and binary acid is a better carrier for tobacco flavor, which has a higher loading rate than traditional carriers (such as β-cyclodextrin), and also has good thermal stability and is not easy to decompose when heated. Since the thick pulp method inevitably requires a high-temperature drying step, a flavor carrier with good thermal stability can significantly improve the loading effect of flavor in the product.

[0043] 3. The thick pulp method reconstituted tobacco leaf and the preparation method thereof provided by the present patent have high production efficiency, and the cross-linked carrier of the present patent can maintain considerable flavor loading effect in actual production, avoiding decomposition of the carrier and volatilization of the flavor due to high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0044] The above summary of the present invention and the following detailed description 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 solutions.

[0045] Figure 1 The present invention is a flow chart for preparing reconstituted tobacco leaves using the thick pulp method. DETAILED DESCRIPTION

[0046] The detailed features and advantages of the present invention are described in detail below in the specific embodiments, and the content is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant purposes and advantages of the present invention.

[0047] To make the objectives, technical solutions, and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The experimental methods described in the examples of the present invention are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following examples are all commercially available unless otherwise specified.

[0048] Before disclosing and describing the materials, compounds, compositions, articles, devices and methods of the present invention, it should be understood that the following aspects are not limited to specific synthetic methods or specific reagents, as these can, of course, vary. It should also be understood that the terminology used herein is for the purpose of describing specific aspects only and is not intended to be limiting.

[0049] In the following examples, the names of specific manufacturing equipment or experimental instruments and the manufacturers of the equipment are shown in Table 1:

[0050] Table 1 Name of manufacturing equipment or experimental equipment and purchasing manufacturer

[0051]

[0052] Among them, the implementation of the casting device can refer to the Chinese patent application with application number CN202211034193.3, entitled A slurry slide and thick slurry method tobacco sheet testing equipment.

[0053] In the following examples, the specific raw material names and purchasing manufacturers are shown in Table 2:

[0054] Table 2 Raw material names and purchasing manufacturers

[0055]

[0056]

[0057] Some embodiments of this patent provide a method for producing reconstituted tobacco leaves using a thick slurry method according to a first aspect of the present invention, comprising the following steps:

[0058] Step A: preparing a reconstituted tobacco slurry containing a cross-linked flavor and fragrance carrier;

[0059] Step B: Casting the reconstituted tobacco slurry to form a reconstituted tobacco.

[0060] The cross-linked flavor carrier refers to a cross-linked carrier loaded with flavors, which is prepared by esterification of cyclodextrin and dibasic acid.

[0061] Cyclodextrin (CD for short) is a series of cyclic oligosaccharides generated by the action of cyclodextrin glucosyltransferase produced by Bacillus, usually containing 6-12 D-glucopyranose units. Among them, the molecules containing 6, 7 and 8 glucose units, respectively called α-cyclodextrin, β-cyclodextrin and γ-cyclodextrin, are more studied and have important practical significance. According to the results of X-ray crystal diffraction, infrared spectrum and nuclear magnetic resonance spectrum analysis, it is determined that each D(+)-glucopyranose of the cyclodextrin molecule is in a chair conformation. Each glucose unit is combined into a ring with 1,4-glycosidic bond. Due to the free rotation of the glycosidic bond connecting the glucose units, cyclodextrin is not a cylindrical molecule but a slightly conical ring.

[0062] Advantageously, the applicant found that the cross-linked carrier produced by the reaction of cyclodextrin and dibasic acid is a better carrier for tobacco flavors, which has a higher loading rate than traditional carriers (such as β-cyclodextrin) and also has good thermal stability and is not easy to decompose when heated. Since the thick pulp method inevitably requires a high-temperature drying step, a flavor carrier with good thermal stability can significantly improve the loading effect of flavors in the product.

[0063] In some embodiments, step A comprises:

[0064] Step A-1: crushing the tobacco material to obtain a crushed tobacco material;

[0065] Step A-2: emulsifying the paper pulp fibers and the atomizing agent to obtain a mixed emulsion;

[0066] Step A-3: gelatinizing the cross-linked carrier and water to obtain a cross-linked sol;

[0067] Step A-4: mixing the crushed tobacco material, the mixed emulsion, the cross-linked sol, the inorganic filler, the flavors and the water to obtain a reconstituted tobacco slurry.

[0068] Advantageously, the cross-linked carrier of the present patent can generally load flavors after being mixed with flavors.

[0069] In some embodiments, the emulsification temperature in step A-2 is 40-60°C, and the emulsification time is 0.5-2h; the gelatinization temperature in step A-3 is 60-90°C, and the gelatinization time is 0.5-2h.

[0070] In some embodiments, step B comprises: forming the slurry on the metal support by flow casting, and obtaining the thick slurry method reconstituted tobacco leaf after drying and setting.

[0071] In some embodiments, the surface temperature of the metal support is 90-120℃.

[0072] In some embodiments, the drying and setting is hot air drying, and the hot air temperature is 90-120℃.

[0073] The second aspect of the present application provides a thick slurry method reconstituted tobacco leaf, which is prepared by the method of manufacturing reconstituted tobacco leaf by the thick slurry method described above.

[0074] The third aspect of the present application provides an aerosol generating article comprising the thick slurry method reconstituted tobacco leaf described above.

[0075] Advantageously, under these conditions, the thick slurry method reconstituted tobacco leaf has high production efficiency, and the cross-linked carrier of the present patent can maintain considerable fragrance and flavor loading effect under these conditions, avoiding carrier decomposition and fragrance and flavor volatilization due to high temperature.

[0076] The pasting temperature can be 60℃, 70℃, 75℃, 80℃ or 90℃; or a range value between any two of the above.

[0077] The present application does not limit the specific way of mixing described above, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization under normal temperature conditions, a uniform and stable slurry is obtained.

[0078] In some specific embodiments, the surface temperature of the metal support can be 90℃, 95℃, 100℃, 105℃, 110℃, 115℃ or 120℃; or a range value between any two of the above.

[0079] The parameters of flow casting include a flow casting box slit width of 0.1-1mm and a flow casting box slurry distribution speed of 15cm / s; specifically, 1cm / s, 2cm / s, 3cm / s, 4cm / s or 5cm / s.

[0080] In some specific embodiments, the temperature of hot air drying can be 90℃, 95℃, 100℃, 105℃, 110℃, 115℃ or 120℃; or a range value between any two of the above.

[0081] Some other embodiments of the present patent relate to an aerosol generating article comprising the thick slurry method reconstituted tobacco leaf described above.

[0082] The present application is prepared from the above-mentioned reconstituted tobacco leaf into a cigarette, which can include smokeable articles, such as cigarettes, cigars and cigarillos. As another example, the smokeable article can include a combustion-type smokeable article and a heating-type smokeable article.

[0083] The present patent is further described in conjunction with the following Figure 1 and specific examples.

[0084] Example 1

[0085] A thick pulp method reconstituted tobacco leaf is prepared from a thick pulp method reconstituted tobacco leaf raw material, which includes the following components in parts by weight: 100 parts of tobacco material, 5 parts of broadleaf wood pulp, 30 parts of glycerol, 8 parts of cross-linked carrier, 5 parts of calcium carbonate, 5 parts of blueberry essence, and 300 parts of water.

[0086] The cross-linked carrier is prepared by the following steps:

[0087] Dissolve 20g of beta-cyclodextrin and 20g of fumaric acid in 400mL of water, add 0.3g of sodium citrate, and react at 70℃ for 4h, then filter and dry to obtain the cross-linked carrier.

[0088] The thick pulp method reconstituted tobacco leaf is prepared by the following steps:

[0089] A) Pulverize the tobacco material to obtain pulverized tobacco material;

[0090] B) Emulsify the fibers and atomizing agent to obtain a mixed emulsion;

[0091] C) Mix the cross-linked carrier and water to obtain a cross-linked sol;

[0092] C) Mix the tobacco raw material, the mixed emulsion, the cross-linked sol, the essence and spice, the inorganic filler, and the water to obtain a slurry;

[0093] D) Spread and form the slurry on a metal receiving object by flow casting, and after drying and setting, the thick pulp method reconstituted tobacco leaf is obtained.

[0094] The emulsification temperature is 40℃, and the time is 1h.

[0095] The pasting treatment temperature is 60℃, and the time is 0.5h.

[0096] The present application does not limit the specific manner of mixing, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization at room temperature, a uniform and stable slurry is obtained.

[0097] The surface temperature of the metal receiving object is 90℃.

[0098] The parameters of the flow and spread forming include that the slit width of the flow box is 0.1 mm, and the flow box cloth pulp speed is 1 cm / s.

[0099] The drying is hot air drying, and the temperature of the hot air drying is 90 DEG C.

[0100] Example 2

[0101] A thick slurry method reconstituted tobacco leaf is made of thick slurry method reconstituted tobacco leaf raw materials, and the thick slurry method reconstituted tobacco leaf raw materials include the following components in parts by weight: 100 parts of tobacco material, 5 parts of coniferous wood pulp, 30 parts of glycerol, 8 parts of cross-linked carrier, 5 parts of calcium carbonate, 5 parts of blueberry essence, and 300 parts of water.

[0102] The cross-linked carrier is prepared by the following steps:

[0103] 20 g of γ-cyclodextrin and 20 g of malic acid are dissolved in 400 mL of water, 0.2 g of sodium tartrate catalyst is added, and after reaction at 70 DEG C for 4 h, the cross-linked carrier is obtained by filtration and drying.

[0104] The thick slurry method reconstituted tobacco leaf is prepared by the following steps:

[0105] A) The tobacco material is crushed to obtain crushed tobacco material;

[0106] B) The fibers and atomizing agents are emulsified to obtain a mixed emulsion;

[0107] The cross-linked carrier and water are gelatinized to obtain a cross-linked sol;

[0108] C) The tobacco raw material, the mixed emulsion, the cross-linked sol, the inorganic filler, the essence and spice, and the water are mixed to obtain a slurry;

[0109] D) The slurry is formed on a metal receiving object by flow and spread forming, and after drying and setting, the thick slurry method reconstituted tobacco leaf is obtained.

[0110] The emulsification temperature is 60 DEG C, and the time is 2 h.

[0111] The gelatinization temperature is 90 DEG C, and the time is 2 h.

[0112] The specific manner of the mixing is not limited, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization at room temperature, a uniform and stable slurry is obtained.

[0113] The surface temperature of the metal receiving object is 120 DEG C.

[0114] The parameters of the flow and spread forming include that the slit width of the flow box is 1 mm, and the flow box cloth pulp speed is 5 cm / s.

[0115] The drying is hot air drying, and the temperature of the hot air drying is 120 DEG C.

[0116] Example 3

[0117] The thick slurry method reconstituted tobacco is made of thick slurry method reconstituted tobacco raw materials, and the thick slurry method reconstituted tobacco raw materials include the following components in parts by weight: 100 parts of tobacco material, 10 parts of broadleaf wood pulp, 25 parts of glycerol, 6 parts of cross-linking carrier, 3 parts of calcium carbonate, 4 parts of mint essence, and 300 parts of water.

[0118] The cross-linking carrier is prepared by the following steps:

[0119] 20g of hydroxypropyl-β-cyclodextrin and 20g of malonic acid are dissolved in 400mL of water, 0.4g of sodium citrate catalyst is added, and after reaction at 65 DEG C for 6h, the cross-linking carrier is obtained by filtration and drying.

[0120] The thick slurry method reconstituted tobacco is prepared by the following steps:

[0121] A) The tobacco material is crushed to obtain crushed tobacco material;

[0122] B) The fibers and atomizing agents are emulsified to obtain a mixed emulsion;

[0123] The cross-linking carrier and water are gelatinized to obtain a cross-linking sol;

[0124] C) The tobacco raw material, the mixed emulsion, the cross-linking sol, the inorganic filler, the essence and spice, and the water are mixed to obtain a slurry;

[0125] D) The slurry is formed by flow casting on a metal receiving object, and the thick slurry method reconstituted tobacco is obtained after drying and setting.

[0126] The emulsification temperature is 50 DEG C, and the time is 1.5h.

[0127] The gelatinization temperature is 70 DEG C, and the time is 1h.

[0128] The present application does not limit the specific manner of the above mixing, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization at room temperature, a uniform and stable slurry is obtained.

[0129] The surface temperature of the metal receiving object is 100 DEG C.

[0130] The parameters of the flow casting include a flow casting box slit width of 0.5mm and a flow casting box spreading speed of 3cm / s.

[0131] The drying is hot air drying, and the temperature of the hot air drying is 110 DEG C.

[0132] Example 4

[0133] A kind of thick pulp method reconstituted tobacco is made of thick pulp method reconstituted tobacco raw material, by weight parts, thick pulp method reconstituted tobacco raw material includes the following components: tobacco material 100 parts, broadleaf wood pulp 12 parts, glycerol 15 parts, propylene glycol 10 parts, crosslinked carrier 5 parts, calcium carbonate 5 parts, tobacco natural flavor essence 3 parts, fruit compound essence 3 parts, water 400 parts.

[0134] Wherein, the crosslinked carrier is prepared by the following steps:

[0135] 20g alpha-cyclodextrin is dissolved with 20g citric acid in 400mL water, 0.24g sodium citrate catalyst is added, after reaction at 80 DEG C for 3h, filtration and drying are carried out to obtain the crosslinked carrier.

[0136] Thick pulp method reconstituted tobacco is prepared by the following steps:

[0137] A) the tobacco material is crushed to obtain the crushed tobacco material;

[0138] B) the fibers and atomizing agent are emulsified to obtain a mixed emulsion;

[0139] The crosslinked carrier and water are gelatinized to obtain a crosslinked sol;

[0140] C) the tobacco raw material, mixed emulsion, crosslinked sol, inorganic filler, essence and spice and water are mixed to obtain a slurry;

[0141] D) the slurry is formed by flow casting on a metal receiving object, and after drying and setting, thick pulp method reconstituted tobacco is obtained.

[0142] Wherein, the emulsification temperature is 60 DEG C;Time is 2h.

[0143] Wherein, the gelatinization temperature is 90 DEG C;Time is 0.2h.

[0144] The specific manner of the above mixing is not limited, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization at room temperature, a uniform and stable slurry is obtained.

[0145] Wherein, the surface temperature of the metal receiving object is 110 DEG C.

[0146] Wherein, the parameters of flow casting include a flow casting box slit width of 1mm and a flow casting box spreading speed of 3cm / s.

[0147] Wherein, the drying is hot air drying, and the hot air drying temperature is 110 DEG C.

[0148] Example 5

[0149] The thick pulp reconstituted tobacco leaf prepared in the above Examples 1-4 is used to prepare a heat-not-burn cigarette.

[0150] It will be appreciated that the aerosol-generating article includes a smoking article such as a cigarette, cigar, and cigarillo. As another example, the aerosol-generating article can include a combustion-type smoking article and a heating-type smoking article.

[0151] Comparative Example 1

[0152] A thick pulp reconstituted tobacco leaf is prepared from a thick pulp reconstituted tobacco leaf material, which includes the following components in parts by weight: 100 parts of tobacco material, 5 parts of broadleaf wood pulp, 30 parts of glycerol, 8 parts of a traditional carrier, 5 parts of calcium carbonate, 5 parts of blueberry flavoring, and 300 parts of water.

[0153] The traditional carrier is porous starch.

[0154] The thick pulp reconstituted tobacco leaf is prepared by the following steps:

[0155] A) crushing the tobacco material to obtain crushed tobacco material;

[0156] B) emulsifying the fibers and the atomizing agent to obtain a mixed emulsion;

[0157] C) mixing the thick pulp reconstituted tobacco leaf material, the mixed emulsion, the crosslinked sol, the inorganic filler, the flavoring and the water to obtain a slurry;

[0158] D) forming the slurry on a metal receiving object by flow casting, and obtaining the thick pulp reconstituted tobacco leaf after drying and setting.

[0159] The emulsification temperature is 40°C, and the time is 1 h.

[0160] The pasting treatment temperature is 60°C, and the time is 0.5 h.

[0161] The mixing method is not limited, and any mixing method known to those skilled in the art can be used. The slurry is uniformly and stably obtained after sufficient mixing and homogenization at room temperature.

[0162] The surface temperature of the metal receiving object is 90°C.

[0163] The flow casting parameters include a flow casting box slit width of 0.1 mm and a flow casting box spreading speed of 1 cm / s.

[0164] The drying is hot air drying, and the hot air drying temperature is 90°C.

[0165]

[0166] Comparative Example 2 ​

[0167] A thick slurry method reconstituted tobacco leaf is made of a thick slurry method reconstituted tobacco leaf raw material, the thick slurry method reconstituted tobacco leaf raw material includes the following components by weight parts: tobacco material 100 parts, broadleaf wood pulp 5 parts, glycerol 30 parts, traditional carrier 8 parts, calcium carbonate 5 parts, blueberry essence 5 parts, and water 300 parts.

[0168] The traditional carrier is beta-cyclodextrin.

[0169] The thick slurry method reconstituted tobacco leaf is prepared by the following steps:

[0170] A) crushing the tobacco material to obtain crushed tobacco material;

[0171] B) emulsifying the fibers and atomizing agent to obtain a mixed emulsion;

[0172] C) mixing the tobacco raw material, the mixed emulsion, the cross-linking sol, the inorganic filler, the essence and spice, and the water to obtain a slurry;

[0173] D) forming the slurry on a metal receiving object by flow casting and spreading, and obtaining the thick slurry method reconstituted tobacco leaf after drying and setting.

[0174] The emulsification temperature is 40 DEG C, and the time is 1h.

[0175] The pasting treatment temperature is 60 DEG C, and the time is 0.5h.

[0176] The mixing method is not limited, and the mixing method known to those skilled in the art can be used.

[0177] The mixing method is not limited, and the mixing method known to those skilled in the art can be used.

[0178] The surface temperature of the metal receiving object is 90 DEG C.

[0179] The flow casting and spreading parameters include a flow casting box slit width of 0.1mm and a flow casting box pulp spreading speed of 1cm / s.

[0180] The drying is hot air drying, and the hot air drying temperature is 90 DEG C.

[0181] Comparative Example 3

[0182] A thick slurry method reconstituted tobacco leaf is made of a thick slurry method reconstituted tobacco leaf raw material, the thick slurry method reconstituted tobacco leaf raw material includes the following components by weight parts: tobacco material 100 parts, broadleaf wood pulp 5 parts, glycerol 30 parts, traditional carrier 8 parts, calcium carbonate 5 parts, blueberry essence 5 parts, and water 300 parts.

[0183] The traditional carrier is hydroxypropyl-beta-CD.

[0184] The thick pulp method reconstituted tobacco is prepared by the following steps:

[0185] A) crushing the tobacco material to obtain the crushed tobacco material;

[0186] B) emulsifying the fibers and the atomizing agent to obtain a mixed emulsion; and gelatinizing the cross-linking carrier and water to obtain a cross-linking sol;

[0187] C) mixing the tobacco raw material, the mixed emulsion, the cross-linking sol, the inorganic filler, the essence and spices, and water to obtain a slurry;

[0188] D) forming the slurry on a metal receiving object by flow casting, and obtaining the thick pulp method reconstituted tobacco after drying and shaping.

[0189] The emulsification temperature is 40 DEG C, and the time is 1 h.

[0190] The gelatinization temperature is 60 DEG C, and the time is 0.5 h.

[0191] The mixing method is not limited, and the mixing method known to those skilled in the art can be used. The slurry is uniformly and stably obtained after mixing at room temperature.

[0192] The surface temperature of the metal receiving object is 90 DEG C.

[0193] The flow casting parameters include a flow casting box slit width of 0.1 mm and a flow casting box pulp distribution speed of 1 cm / s.

[0194] The drying is hot air drying, and the hot air drying temperature is 90 DEG C.

[0195] Comparative Example 4

[0196] A thick pulp method reconstituted tobacco is prepared from a thick pulp method reconstituted tobacco raw material. The thick pulp method reconstituted tobacco raw material includes the following components by weight: 100 parts of tobacco material, 5 parts of broadleaf wood pulp, 30 parts of glycerol, 5 parts of calcium carbonate, 5 parts of blueberry essence, and 300 parts of water.

[0197] The thick pulp method reconstituted tobacco is prepared by the following steps:

[0198] A) crushing the tobacco material to obtain the crushed tobacco material;

[0199] B) emulsifying the fibers and the atomizing agent to obtain a mixed emulsion; and gelatinizing the cross-linking carrier and water to obtain a cross-linking sol;

[0200] C) mixing the tobacco raw material, the mixed emulsion, the crosslinked sol, the inorganic filler, the essence and spices, and water to obtain a slurry;

[0201] D) forming the slurry on a metal receiving object by flow casting, and obtaining the thick slurry method reconstituted tobacco leaf after drying and setting.

[0202] The emulsification temperature is 40 DEG C, and the time is 1h.

[0203] The temperature of the gelatinization treatment is 60 DEG C, and the time is 0.5h.

[0204] The present application does not limit the specific manner of the above mixing, and the mixing known to those skilled in the art can be used. After sufficient mixing and homogenization at room temperature, a uniform and stable slurry is obtained.

[0205] The surface temperature of the metal receiving object is 90 DEG C.

[0206] The parameters of the flow casting include a flow casting box slit width of 0.1mm and a flow casting box slurry distribution speed of 1cm / s.

[0207] The drying is hot air drying, and the temperature of the hot air drying is 90 DEG C.

[0208] Test Example 1

[0209] Loading capacity test method

[0210] Test by GC-MS:

[0211] 1.1 Raw materials and instruments

[0212] Raw materials: anhydrous ethanol (chromatographic purity).

[0213] Instruments: gas chromatograph mass spectrometer 7890 / 5977B Agilent.

[0214] 1.2 Analysis method

[0215] Take 1 g of sample, add 50 mL of chromatographically pure anhydrous ethanol, shake bed for 12 h, and then analyze the sample using gas chromatography-mass spectrometry (Agilent 7890B / 5977B) after passing through a 0.22 μm membrane. The injection volume is 3 μL, and the gas chromatography column is Agilent DB-5ms (length 60 m, inner diameter 0.25 mm, film thickness 0.25 μm). The carrier gas is high-purity helium (purity > 99.999%), and the flow rate is 1.00 mL / min. The sample is injected in splitless mode. The mass spectrometry source temperature is 230.00°C, and the mass spectrometry quadrupole rod temperature is 150.00°C. The mass spectrometry scanning range is 30.00-500.00 m / z. The mass spectrometry delay time is set to 6.50 min. The injection port temperature is set to 250.00°C, and the column temperature program is: 40.00°C for 3.00 min, then increased to 250.00°C at a rate of 5.00°C / min and held for 10.00 min.

[0216] 2. Results and discussion

[0217] Test Sample Vanillin Relative Peak Area Raspberry Ketone Relative Peak Area Example 1 3.52 6.84 Comparative Example 2 3.36 6.31 Comparative Example 4 3.07 6.11

[0218] From the relative peak areas (contents) of vanillin and raspberry ketone, which are the core indicators affecting flavor sensory quality, the improvement of both core indicators is more than 5%, indicating that the embedding and retention effect of core spices of Example 1 is significantly better than that of the prior art, and Examples 2, 3, and 4 also have similar effects to Example 1.

[0219] Test Example 2

[0220] Sensory evaluation criteria: Single-point smoking is used for smoking and evaluation of heated cigarettes. Generally, the method is clear, and the compliance of the normal cigarette product sensory quality is evaluated from gloss, aroma, coordination, miscellaneous gas, stimulation, and aftertaste according to GB 5606.4-2005 Cigarettes Part IV: Sensory Technical Requirements. Full marks.

[0221] Table 3 Sensory evaluation results

[0222]

[0223] The sensory evaluation results of Examples 2, 3, and 4 are basically the same as those of Example 1.

[0224] Test Example 3

[0225] Thermal stability test: The cross-linked carrier in each example is filtered and dried in an 80°C oven for 2 h to ensure complete evaporation of moisture. The dried product is heated in a 160°C oven for 4 h to determine the mass retention rate and the thermal stability of the reaction product.

[0226] Table 4 Different diacid esterification reactivity and product thermal stability

[0227]

[0228] The crosslinked carriers prepared from different diacids all showed better thermal stability than traditional carriers such as β-cyclodextrin (the mass retention rate of β-cyclodextrin was 64.3±0.5% under the same conditions), which indicated that the crosslinked carriers added in the reconstituted tobacco had better thermal stability for the loaded flavor, could reduce the loss of flavor in the production process, and improve the flavor loading capacity of the reconstituted tobacco.

[0229] In this specification, reference to "one embodiment", "one implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment / implementation is included in at least one embodiment / implementation of the application. The appearance of the phrases "in one embodiment / implementation" in various places in the specification are not necessarily all referring to the same embodiment / implementation, but are instead intended to relate to possible embodiments / implementation, as can be appreciated by those of ordinary skill in the art. Furthermore, where a particular feature, structure, or characteristic is described in connection with an embodiment / implementation, it is submitted that it is within the purview of one of ordinary skill in the art to effect such feature, structure, or characteristic in connection with a different embodiment / implementation as can be

[0230] Similarly, it is to be understood that the various features that have been described in the above description of the example embodiments / implementation of the application are meant to be methods of description rather than limitations on the claimed invention. Many of the features described above in the context of separate embodiments / implementation can well be combined to form a single embodiment / implementation of the application. Furthermore, the description of the example embodiments / implementation of the application is not meant to be limited to the specific embodiments / implementation described above. Thus, the claims are not to be limited to the specific embodiments / implementation described above, but rather are meant to be given their full breadth of scope. It is expressly intended that the claims are meant to cover all adaptations, modifications, and alterations of the described embodiments / implementation thereof, falling within the scope and spirit of the invention. Furthermore, the claims are meant to cover all of the generic and specific features of the various embodiments / implementation described above, as well as all statements of the application that can be formed by adding together features or elements from two or more of the described embodiments / implementation.

[0231] Furthermore, while some embodiments / implementation described herein include some, but not other, features included in other embodiments / implementation, combinations of features of the different embodiments / implementation, as would be understood by one of ordinary skill in the art, are intended to be within the scope of the application. For example, in the claims, any of the embodiments / implementation can be used in any combination.

Claims

1. A method of manufacturing reconstituted tobacco leaf by the thick stock process, characterized by, The method comprises the following steps Step A: preparing a reconstituted tobacco slurry comprising a cross-linked flavor carrier; Step B: casting and spreading the reconstituted tobacco slurry to form a reconstituted tobacco.

2. The method of producing reconstituted tobacco leaf by a thick stock process according to claim 1, characterized by, The cross-linked flavor carrier refers to a cross-linked carrier loaded with flavors; The cross-linked carrier is prepared by esterification of cyclodextrin and a dibasic acid.

3. The method of manufacturing reconstituted tobacco leaf by the thick stock process according to claim 2, characterized by, The cyclodextrin includes at least one of β-cyclodextrin, α-cyclodextrin, γ-cyclodextrin, and hydroxypropyl-β-cyclodextrin. The dibasic acid is at least one selected from the group consisting of fumaric acid, malic acid, malonic acid, citric acid, and succinic acid.

4. The method of manufacturing reconstituted tobacco leaf by the thick stock process according to claim 2, characterized by, The esterification reaction comprises the following steps: dissolving the cyclodextrin and the dibasic acid, adding a catalyst, and reacting at 60-70°C for 2-4h, and then filtering and drying to obtain the cross-linked carrier.

5. The method of manufacturing reconstituted tobacco leaf by the thick stock process according to claim 2, characterized by, The mass retention rate of the cross-linked carrier after being heated at 160°C for 4h is not less than 68.2%, 75.4%, 82.1%, or 95.3%.

6. The method of producing reconstituted tobacco leaf by the thick stock process according to claim 1, characterized by, The step A comprises: Step A-1: crushing tobacco material to obtain crushed tobacco material; Step A-2: emulsifying paper pulp fibers and atomizing agents to obtain a mixed emulsion; Step A-3: gelatinizing the cross-linked carrier and water to obtain a cross-linked sol; Step A-4: mixing the crushed tobacco material, the mixed emulsion, the cross-linked sol, inorganic fillers, flavors, and water to obtain the reconstituted tobacco slurry.

7. The method for manufacturing reconstituted tobacco by the thick slurry method according to claim 6, wherein The emulsification temperature in step A is 40-60°C, and the emulsification time is 0.5-2h; The gelatinization temperature in step A is 60-90°C, and the gelatinization time is 0.5-2h.

8. The method of producing reconstituted tobacco leaf by the thick stock process according to claim 1, characterized by, The step B comprises: casting and spreading the slurry on a metal receiving object to obtain the thick slurry method reconstituted tobacco after drying and setting; The surface temperature of the metal receiving object is 90-120°C; The drying and setting is hot air drying, and the hot air temperature is 90-120°C.

9. A reconstituted tobacco leaf by the thick stock process, characterized by, The thick slurry method reconstituted tobacco prepared by the method according to any one of claims 1-8.

10. An aerosol-generating article, characterised in that, The thick slurry method reconstituted tobacco according to claim 9.

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