A reconstituted cut stem with a low breakage rate, its preparation method and application

Abstract

The present invention provides a reconstituted cut stem with a low breakage rate, a preparation method and an application thereof. The reconstituted cut stem is composed of blank cut stem and backfill liquid; the backfill liquid includes a fiber mixture and a tobacco extract; the raw materials of the fiber mixture include nanofibers, bleached softwood fibers and bagasse fibers; the whole cut stem rate of the reconstituted cut stem is ≥85%. By adding a fiber mixture to the backfill liquid, the present invention increases the product strength, thereby reducing the proportion of broken cut stem. Among the fiber mixture adopted, the three fibers of nanofibers, bleached softwood fibers and bagasse fibers act synergistically under a specific mixing ratio, effectively increasing the strength of the reconstituted cut stem, improving the anti-breakage ability of the cut stem, and improving the taste and comfort of the product while increasing the yield.

Description

Technical Field

[0001] The present invention belongs to the technical field of tobacco manufacturing, and particularly relates to a reconstituted cut stem with a low breakage rate, a preparation method thereof, and an application thereof. Background Art

[0002] In recent years, with the full entry into force of the tobacco control convention, it poses a great challenge to the tobacco industry. Producing cigarettes with lower tar and less harm, and guiding consumers to adopt a healthier and more rational consumption pattern is a major development direction for the tobacco industry. Cut stems play a certain role in increasing the filling value of tobacco shreds, reducing the unit consumption of cigarettes, improving the combustibility of cigarettes, enhancing the permeability of cigarette smoke, reducing the tar content of cigarette smoke, and improving the quality of cigarettes. However, traditional cut stems have poor sensory quality, with disadvantages such as insufficient aroma, excessive off-flavors, dull tobacco taste, weak body, and strong irritation, which limit the extensive use of cut stems in medium- and high-grade cigarette formulations.

[0003] Reconstituted cut stem is an innovative technology for treating cut stems proposed in recent years. Mainly through processes such as pressing the stem, cutting, and leaching, the soluble substances in the tobacco stem are extracted to obtain a filamentous blank cut stem carrier. Then, a backfill liquid prepared by blending tobacco extract and flavorings is applied to the blank cut stem. After homogenization and drying, a reconstituted cut stem product is obtained. The reconstituted cut stem retains the "shape" of the cut stem, and its filling value can generally reach more than 10 cm 3 / g, while that of traditional cut stems is only about 7 cm 3 / g. When applied to cigarette products, it can reduce the single cigarette weight by more than 0.03 g. At the same time, due to the backfilling of a large amount of tobacco extract and flavorings, the reconstituted cut stem also has the "quality" of tobacco shreds, which can not only significantly improve the sensory quality of cut stems but also achieve a remarkable effect of reducing tar and harm. In addition, the reconstituted cut stem uses tobacco stem fines and fragments as raw materials for extraction to obtain the backfill liquid, so it is conducive to promoting the efficient recycling of tobacco resources in the industry and achieving the goal of cost reduction and efficiency increase.

[0004] Compared with traditional cut stems, the processing process of reconstituted cut stems is complex and the processing intensity is high. Especially after the backfilling of the liquid, it also needs to go through processes such as extrusion homogenization, fluidized bed drying, drum drying, and vibrating conveying and pneumatic conveying. Therefore, the reconstituted cut stem product has serious breakage, resulting in an integral cut stem rate of only about 75% for the reconstituted cut stem product, while the integral cut stem rate of traditional cut stems is above 85%. The lower integral cut stem rate increases the material loss during the production process of reconstituted cut stems, resulting in a low product yield, and at the same time also affects the blending effect of reconstituted cut stems in cigarette formulations.

[0005] CN106690399A discloses a processing method and system for cut stem for slender cigarettes. After the tobacco stems are subjected to primary slicing, flavor addition, expansion, drying, and air separation, the stem slices are subjected to secondary cutting, and the width of the cut stem after secondary cutting is 0.8 - 1.2 mm; for slender cigarettes, secondary cutting is adopted to effectively obtain a suitable cut stem form. The obtained cut stem has less woody flavor, the smoke is moist and delicate, smooth and mellow, without pungent irritation and burning sensation, smooth when entering the throat, the aftertaste is clean and relatively comfortable, the versatility and compatibility of the cut stem are relatively good, and at the same time, the whole cut stem rate is effectively guaranteed and the breakage rate is reduced. However, the whole cut stem rate only reaches about 75%.

[0006] CN108783562A discloses a method for preparing cut tobacco suitable for new cigarettes, which extracts tobacco leaves with a non-polar solvent, concentrates and distills, and recovers the solvent to form a concentrated tobacco extract. The tobacco leaves after extraction are directly dried at a low temperature and ground into tobacco powder, and the tobacco stems are separated to form tobacco stem fibers. The tobacco leaf powder, tobacco stem fibers and plant fibers are mixed together to form a mixed fiber filament. In a layered stacking manner, the fiber raw materials are laid layer by layer on a net for forming, and a certain amount of adhesive is mixed with the tobacco extraction concentrate and sprayed synchronously with the stacking of the fibers to make the fibers bond into tobacco sheets and dried by microwave, and the dried tobacco sheets are cut into shreds, effectively improving the internal quality of the cut tobacco and solving the drawback that the internal quality of traditional cut tobacco cannot be adjusted. However, this method improves the internal quality of the cut tobacco but cannot guarantee the whole cut stem rate of the cut tobacco.

[0007] Therefore, developing a preparation method for reconstituted cut stem that can effectively improve the whole cut stem rate of the reconstituted cut stem and at the same time take into account the delicate and smooth smoke and the clean and comfortable aftertaste is the research focus in this field. Summary of the Invention

[0008] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a reconstituted cut stem with a low breakage rate, its preparation method and application, which can effectively improve the whole cut stem rate of the reconstituted cut stem and at the same time take into account the delicate and smooth smoke and the clean and comfortable aftertaste.

[0009] To achieve the purpose of this invention, the following technical solutions are adopted by the present invention:

[0010] In the first aspect, the present invention provides a reconstituted cut stem with a low breakage rate, which is composed of blank cut stem and backfill liquid;

[0011] The backfill liquid includes a fiber mixture and a tobacco extract;

[0012] The raw materials of the fiber mixture include nanofibers, bleached softwood fibers and bagasse fibers.

[0013] In the present invention, by adding a fiber mixture to the backfill liquid, hydrogen bond binding forces are generated between the fibers on the surface of the cut tobacco shreds and between them and the fine shredded tobacco during the drying process, increasing the product strength and reducing the proportion of shredded tobacco. The selected nanofibers and bleached softwood fibers have high strength and strong binding force, which are beneficial to improving the anti-breakage effect of the cut tobacco shreds. Bagasse fibers also have the effect of enhancing the taste and comfort of the product. When the three are used in combination, it not only effectively increases the strength of the reconstituted cut tobacco shreds, reduces the breakage rate, but also can improve the taste and comfort of the product.

[0014] In the present invention, the "low breakage rate" means that the whole cut tobacco rate ≥ 85%, for example, it can be 86%, 87%, 88%, 90%, etc.

[0015] Preferably, the whole cut tobacco rate of the reconstituted cut tobacco shreds ≥ 85%, for example, it can be 86%, 87%, 88%, 90%, etc.

[0016] Preferably, the moisture content of the blank cut tobacco shreds is 20 - 30%, for example, it can be 22%, 24%, 26%, 28%, etc.

[0017] Preferably, the backfill liquid includes 1 - 3 parts by weight of the fiber mixture (for example, it can be 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, etc.) and 80 - 95 parts by weight of the tobacco extract (for example, it can be 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, etc.).

[0018] Preferably, the backfill liquid further includes a strengthening agent and flavor and fragrance.

[0019] Preferably, the strengthening agent includes pullulan polysaccharide.

[0020] Pullulan polysaccharide is a polysaccharide substance produced by natural fermentation, which has the characteristics of easy water solubility, good film-forming property and high viscosity. Adding it to the backfill liquid of the reconstituted cut tobacco shreds can achieve a good strengthening effect. At the same time, because it is non-toxic, harmless, colorless and odorless, it will not affect the sensory quality of the product. Selectively adding a certain proportion of the strengthening agent further strengthens the anti-breakage ability of the reconstituted cut tobacco shreds. Therefore, it can effectively improve the whole cut tobacco rate of the product, achieve an increase in the product yield, and improve the application effect of the reconstituted cut tobacco shreds product in cigarettes.

[0021] Preferably, the backfill liquid contains, by weight fraction, 1-3 parts of fiber mixture (such as 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, etc.), 80-95 parts of tobacco extract (such as 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, etc.), 0.1-0.8 parts of reinforcing agent (such as 0.2 parts, 0.4 parts, 0.6 parts, etc.), and 0.1-10 parts of essence and flavor (such as 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, etc.).

[0022] Other specific point values within the above numerical ranges can be selected and will not be elaborated here one by one.

[0023] Preferably, the mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the fiber mixture is 1:(2-9):(2-5), such as 1:2:2, 1:4:2, 1:6:2, 1:8:2, 1:2:4, 1:4:4, 1:6:4, 1:8:4, etc.

[0024] When the nanofibers, bleached softwood fibers, and bagasse fibers in the fiber mixture adopt the ratio of the present invention, they can effectively increase the strength of the reconstituted cut tobacco, reduce the breakage rate, and improve the taste and comfort of the product.

[0025] In a second aspect, the present invention provides a method for preparing reconstituted cut tobacco with a low breakage rate as described in the first aspect. The preparation method includes the following steps:

[0026] Preparing blank cut tobacco: After washing, soaking, pressing, cutting, leaching, and drying the tobacco stem raw material, the blank cut tobacco is obtained;

[0027] Preparing the backfill liquid: Mixing nanofibers, bleached softwood fibers, and bagasse fibers and then pulping to obtain a fiber mixture, and mixing the fiber mixture, tobacco extract, and optionally a reinforcing agent and essence and flavor uniformly to obtain the backfill liquid;

[0028] Preparing reconstituted cut tobacco: Adding the backfill liquid to the blank cut tobacco, and obtaining the reconstituted cut tobacco through extrusion homogenization, equilibration, and drying.

[0029] Preferably, the beating degree of the pulping is 88-96°SR, such as 88°SR, 90°SR, 92°SR, 94°SR, etc.

[0030] The externally added fibers are relatively long and prone to forming flocs when added to the backfill liquid, resulting in poor dispersion. Therefore, it is necessary to pulp them at a high intensity to effectively reduce the fiber length, improve the dispersion effect, and also facilitate enhancing the binding force.

[0031] Preferably, the backfill rate of the reconstituted cut stem is 30-50%, and can be, for example, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, etc.

[0032] The calculation method of the backfill rate: (weight of absolute dry matter contained in the backfill liquid / absolute dry weight of the finished reconstituted cut stem) × 100%.

[0033] Other specific point values within the above numerical ranges can be selected, and will not be elaborated one by one here.

[0034] In a third aspect, the present invention provides an application of the reconstituted cut stem with a low breakage rate as described in the first aspect in fine cigarette, medium cigarette, thick cigarette or electronic cigarette.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] By adding a fiber mixture to the backfill liquid, the present invention enables the fibers to generate hydrogen bond binding forces on the surface of the cut stem and between it and the fine shredded cut stem during the drying process, increasing the product strength and reducing the proportion of shredded cut stem.

[0037] The nanofibers, bleached softwood fibers and bagasse fibers in the fiber mixture adopted by the present invention act synergistically to effectively increase the strength of the reconstituted cut stem. And by further optimizing the proportion relationship between the three fibers, the anti-breakage ability of the cut stem is effectively improved, and the taste and comfort of the product can be enhanced while achieving a high yield. Detailed Embodiments

[0038] The technical solutions of the present invention will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0039] As used herein, the terms "comprising", "including", "having", "containing" or any other variation thereof are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or device containing the listed elements is not necessarily limited to those elements, but may also include other elements not expressly listed or elements inherent to such composition, step, method, article or device.

[0040] "Optional" or "any one" means that the matter or event described thereafter may or may not occur, and this description includes the case where the event occurs and the case where the event does not occur.

[0041] The indefinite articles "a" and "an" before the elements or components of the present invention do not limit the number requirement (i.e., the number of occurrences) of the elements or components. Therefore, "a" or "an" should be construed to include one or at least one, and the singular form of the element or component also includes the plural form, unless the quantity clearly refers only to the singular form.

[0042] The description of terms such as "one embodiment", "some embodiments", "exemplarily", "specific examples", or "some examples" described in the present invention means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this document, the schematic representations of the above terms are not necessarily directed to the same embodiment or example.

[0043] The sources of the reagents or instruments in the following examples are as follows:

[0044] Tobacco extract: Concentrated extract of the raw material formula of tobacco fragments, provided by Jiangsu Xinyuan Tobacco Sheet Co., Ltd.;

[0045] Fragrance and flavor: Formula fragrance and flavor, provided by Jiangsu Xinyuan Tobacco Sheet Co., Ltd.;

[0046] Pullulan: Shandong Kangnaxin Biotechnology Co., Ltd., with an active substance content of 99.3%;

[0047] Nanofibers: Northern Reagent Cellulose Materials Co., Ltd.;

[0048] Bleached softwood fibers: Canadian Rainbow brand;

[0049] Bagasse fibers: Nanning Langbaisite Paper Co., Ltd.;

[0050] Hardwood fibers: Nanning Langbaisite Paper Co., Ltd.;

[0051] Flax fibers: Nanning Langbaisite Paper Co., Ltd.;

[0052] Villus fibers: Nanning Langbaisite Paper Co., Ltd.

[0053] Example 1

[0054] This example provides a reconstituted stem cut tobacco. The backfill liquid of the reconstituted stem cut tobacco includes the following components in parts by weight: 2 parts of fiber mixture, 94.5 parts of tobacco extract, 0.5 part of pullulan, and 3 parts of fragrance and flavor;

[0055] The mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the cellulose mixture is 1:6:3;

[0056] The preparation method is as follows:

[0057] (1) After washing, moistening, pressing, cutting, leaching, and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 25% is obtained;

[0058] (2) After mixing nanofibers, bleached softwood fibers, and bagasse fibers and then pulping with a beating degree of 91.3°SR, a fiber mixture is obtained. The fiber mixture, tobacco extract, pullulan polysaccharide, and flavor and fragrance are mixed evenly to obtain the backfill liquid;

[0059] (3) The backfill liquid is added to the blank cut tobacco at a backfill rate of 40%, and after extrusion homogenization, equilibration, and drying, the reconstituted cut tobacco is obtained.

[0060] Example 2

[0061] This example provides a reconstituted cut tobacco. The backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 1 part of fiber mixture, 92.5 parts of tobacco extract, 0.8 part of pullulan polysaccharide, and 5.7 parts of flavor and fragrance;

[0062] The mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the cellulose mixture is 1:9:2;

[0063] The preparation method is as follows:

[0064] (1) After washing, moistening, pressing, cutting, leaching, and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 20% is obtained;

[0065] (2) After mixing nanofibers, bleached softwood fibers, and bagasse fibers and then pulping with a beating degree of 95°SR, a fiber mixture is obtained. The fiber mixture, tobacco extract, pullulan polysaccharide, and flavor and fragrance are mixed evenly to obtain the backfill liquid;

[0066] (3) The backfill liquid is added to the blank cut tobacco at a backfill rate of 30%, and after extrusion homogenization, equilibration, and drying, the reconstituted cut tobacco is obtained.

[0067] Example 3

[0068] This example provides a reconstituted cut tobacco. The backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 3 parts of fiber mixture, 90.7 parts of tobacco extract, 0.3 part of pullulan polysaccharide, and 6 parts of flavor and fragrance;

[0069] The mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the cellulose mixture is 1:2:5;

[0070] The preparation method is as follows:

[0071] (1) After washing, moistening, pressing, cutting, leaching, and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 30% is obtained;

[0072] (2) After mixing nanofibers, bleached softwood fibers, and bagasse fibers and then beating them to a beating degree of 90° SR to obtain a fiber mixture, mixing the fiber mixture, tobacco extract, pullulan polysaccharide, and flavor and fragrance uniformly to obtain the backfill liquid;

[0073] (3) Adding the backfill liquid to the blank cut tobacco at a backfill rate of 30%, and after extrusion homogenization, equilibration, and drying, the reconstituted cut tobacco is obtained.

[0074] Example 4

[0075] This example provides a reconstituted cut tobacco, and the backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 2 parts of fiber mixture, 94.5 parts of tobacco extract;

[0076] In the cellulose mixture, the mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers is 1:6:3;

[0077] The preparation method is as follows:

[0078] (1) After washing, moistening, pressing, cutting, leaching, and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 25% is obtained;

[0079] (2) After mixing nanofibers, bleached softwood fibers, and bagasse fibers and then beating them to a beating degree of 91.3° SR to obtain a fiber mixture, mixing the fiber mixture and tobacco extract uniformly to obtain the backfill liquid;

[0080] (3) Adding the backfill liquid to the blank cut tobacco at a backfill rate of 40%, and after extrusion homogenization, equilibration, and drying, the reconstituted cut tobacco is obtained.

[0081] Example 5

[0082] This example provides a reconstituted cut tobacco, and the difference from Example 1 is only that the mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the cellulose mixture is adjusted to 4:4:2; other raw materials, dosages, and preparation methods are the same as those in Example 1.

[0083] Example 6

[0084] This example provides a reconstituted cut tobacco, and the difference from Example 1 is only that the mass ratio of nanofibers, bleached softwood fibers, and bagasse fibers in the cellulose mixture is adjusted to 0.5:8:1.5; other raw materials, dosages, and preparation methods are the same as those in Example 1.

[0085] Example 7

[0086] This example provides a reconstituted cut tobacco, and the difference from Example 1 is only that the mass ratio of nanofibers, bleached softwood fibers and bagasse fibers in the cellulose mixture is adjusted to 0.5:3:6.5; other raw materials, dosages and preparation methods are the same as those in Example 1.

[0087] Example 8

[0088] This example provides a reconstituted cut tobacco, and the difference from Example 1 is only that the fiber mixture is adjusted to 0.5 parts and the tobacco extract is adjusted to 96 parts; other raw materials, dosages and preparation methods are the same as those in Example 1.

[0089] Example 9

[0090] This example provides a reconstituted cut tobacco, and the difference from Example 1 is only that the fiber mixture is adjusted to 4 parts and the tobacco extract is adjusted to 92.5 parts; other raw materials, dosages and preparation methods are the same as those in Example 1.

[0091] Comparative Example 1

[0092] This comparative example provides a reconstituted cut tobacco, and the difference from Example 1 is only that no nanofibers are added to the cellulose mixture. On the premise of keeping the total amount of the cellulose mixture unchanged, the mass ratio of bleached softwood fibers to bagasse fibers is 6:3; other raw materials and dosages are the same as those in Example 1, and the preparation method refers to Example 1.

[0093] Comparative Example 2

[0094] This comparative example provides a reconstituted cut tobacco, and the difference from Example 1 is only that no bleached softwood fibers are added to the cellulose mixture. On the premise of keeping the total amount of the cellulose mixture unchanged, the mass ratio of nanofibers to bagasse fibers is 1:3; other raw materials and dosages are the same as those in Example 1, and the preparation method refers to Example 1.

[0095] Comparative Example 3

[0096] This comparative example provides a reconstituted cut tobacco, and the difference from Example 1 is only that no bagasse fibers are added to the cellulose mixture. On the premise of keeping the total amount of the cellulose mixture unchanged, the mass ratio of nanofibers to bleached softwood fibers is 1:6; other raw materials and dosages are the same as those in Example 1, and the preparation method refers to Example 1.

[0097] Comparative Example 4

[0098] This comparative example provides a reconstituted cut tobacco, and the backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 2 parts of nanofibers, 94.5 parts of tobacco extract, 0.5 part of pullulan polysaccharide, and 3 parts of essence and fragrance;

[0099] The preparation method is as follows:

[0100] (1) After washing, moistening, pressing, cutting, leaching and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 25% is obtained;

[0101] (2) The nanofibers are beaten to a beating degree of 91.3°SR, and the beaten nanofibers, tobacco extract, pullulan polysaccharide and essence are mixed evenly to obtain the backfill liquid;

[0102] (3) The backfill liquid is added to the blank cut tobacco at a backfill rate of 40%, and after extrusion homogenization, equilibration and drying, the reconstituted cut tobacco is obtained.

[0103] Comparative Example 5

[0104] This comparative example provides a reconstituted cut tobacco, and the backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 2 parts of bleached softwood fiber, 94.5 parts of tobacco extract, 0.5 part of pullulan polysaccharide, and 3 parts of essence;

[0105] The preparation method is as follows:

[0106] (1) After washing, moistening, pressing, cutting, leaching and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 25% is obtained;

[0107] (2) The bleached softwood fiber is beaten to a beating degree of 91.3°SR, and the beaten bleached softwood fiber, tobacco extract, pullulan polysaccharide and essence are mixed evenly to obtain the backfill liquid;

[0108] (3) The backfill liquid is added to the blank cut tobacco at a backfill rate of 40%, and after extrusion homogenization, equilibration and drying, the reconstituted cut tobacco is obtained.

[0109] Comparative Example 6

[0110] This comparative example provides a reconstituted cut tobacco, and the backfill liquid of the reconstituted cut tobacco includes the following components in parts by weight: 2 parts of bagasse fiber, 94.5 parts of tobacco extract, 0.5 part of pullulan polysaccharide, and 3 parts of essence;

[0111] The preparation method is as follows:

[0112] (1) After washing, moistening, pressing, cutting, leaching and drying the tobacco stem raw material, blank cut tobacco with a moisture content of 25% is obtained;

[0113] (2) The bagasse fibers are mixed and then beaten to a beating degree of 91.3°SR, and the beaten bagasse fibers, tobacco extract, pullulan polysaccharide and essence are mixed evenly to obtain the backfill liquid;

[0114] (3) Add the backfill liquid to the blank cut tobacco at a backfill rate of 40%, and obtain the reconstituted cut tobacco through extrusion homogenization, equilibration, and drying.

[0115] Comparative Examples 7 - 11

[0116] This comparative example provides a kind of reconstituted cut tobacco, the difference from Example 1 is only that the beating degree in step (2) is adjusted to 72.0°SR, 79.0°SR, 86.5°SR, 90.0°SR, and 95.5.0°SR respectively; other raw materials, dosages, and preparation methods are the same as those in Example 1.

[0117] Comparative Examples 12 - 14

[0118] This comparative example provides a kind of reconstituted cut tobacco, the difference from Comparative Example 4 is only that the nanofibers are respectively replaced with the same amount of broadleaf wood fibers, flax fibers, and fluff fibers; other raw materials, dosages, and preparation methods are the same as those in Comparative Example 4.

[0119] Test Example 1

[0120] Statistics were carried out on the whole cut tobacco rate and yield of the reconstituted cut tobacco prepared in the examples and comparative examples, and the results are shown in Table 1, Table 2, and Table 3.

[0121] Test Example 2

[0122] Test objects: Medium - sized cigarettes of the same brand prepared with the reconstituted cut tobacco obtained from the examples and comparative examples respectively;

[0123] Test method: Score according to "GB 5606.4 - 2005 Cigarettes - Part 4: Sensory Technical Requirements". 30 personnel with the qualification of cigarette sensory evaluation scored the aroma (full score 30 points), harmony (full score 5 points), off - flavors (full score 15 points), irritation (full score 20 points), and aftertaste (full score 25 points) of the cigarettes made from the reconstituted cut tobacco, and the average value of each group was taken as the test result. The test results are shown in Table 1, Table 2, and Table 3.

[0124] Table 1

[0125]

[0126]

[0127] According to the table data, the backfill liquid used in the reconstituted cut tobacco provided by the present invention is preferably a combination of fiber mixture, tobacco extract, enhancer and flavor. When the enhancer is not added, the whole cut tobacco rate decreases slightly; when nanofibers, bleached softwood fibers and bagasse fibers are used in combination and within the proportion range of the present invention, they have a synergistic effect, the whole cut tobacco rate is relatively high, and the sensory evaluation results are excellent; when the addition amount of the fiber mixture is small, the whole cut tobacco rate is low, and when the addition amount is excessive, the sensory quality significantly decreases.

[0128] Table 2

[0129]

[0130] According to the table data, the beating degree has an impact on the whole cut tobacco rate and sensory evaluation of the reconstituted cut tobacco. When the beating degree is insufficient, both the foreign odor and irritation increase, affecting the taste.

[0131] Table 3

[0132]

[0133] According to the table data, when other types of plant fibers are used, the effect is not as good as the combination of nanofibers, bleached softwood fibers and bagasse fibers of the present invention.

[0134] The applicant declares that the present invention uses the above embodiments to illustrate the process method of the present invention, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of each raw material of the product of the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A reconstituted cut stem with a whole cut stem rate ≥ 85% and a low breakage rate, characterized in that, The reconstituted cut stem is composed of blank cut stem and backfill liquid; The backfill liquid includes a fiber mixture and a tobacco extract; The raw materials of the fiber mixture include nanofibers, bleached softwood fibers and bagasse fibers, and the mass ratio of the nanofibers, bleached softwood fibers and bagasse fibers is 1:(2-9):(2-5); The reconstituted cut stem is prepared by the following method, and the method includes the following steps: Preparing blank cut stem: After washing, moistening, pressing, cutting, leaching and drying the tobacco stem raw material, the blank cut stem is obtained; Preparing backfill liquid: Mix nanofibers, bleached softwood fibers and bagasse fibers and then beat them to obtain a fiber mixture. Mix the fiber mixture, tobacco extract, enhancer and flavoring evenly to obtain the backfill liquid; The enhancer includes pullulan; the backfill liquid includes 1-3 parts by weight of the fiber mixture, 80-95 parts by weight of the tobacco extract, 0.1-0.8 parts by weight of the enhancer and 0.1-10 parts by weight of the flavoring; the beating degree of the beating is 88-96°SR; Preparing reconstituted cut stem: Add the backfill liquid to the blank cut stem, and after extrusion homogenization, equilibration and drying, so that hydrogen bond binding force is generated between the fibers on the surface of the blank cut stem and the fine shredded tobacco during the drying process, and the reconstituted cut stem is obtained.

2. The reconstituted cut tobacco according to claim 1, wherein The moisture content of the blank cut stem is 20-30%.

3. A preparation method of reconstituted cut stem with a whole cut stem rate ≥ 85% and a low breakage rate as described in claim 1 or 2, characterized in that, The preparation method includes the following steps: Preparing blank cut stem: After washing, moistening, pressing, cutting, leaching and drying the tobacco stem raw material, the blank cut stem is obtained; Preparing backfill liquid: Mix nanofibers, bleached softwood fibers and bagasse fibers and then beat them to obtain a fiber mixture. Mix the fiber mixture, tobacco extract, enhancer and flavoring evenly to obtain the backfill liquid; the beating degree of the beating is 88-96°SR; Preparing reconstituted cut stem: Add the backfill liquid to the blank cut stem, and after extrusion homogenization, equilibration and drying, the reconstituted cut stem is obtained.

4. The preparation method according to claim 3, characterized in that, The backfill rate of the reconstituted cut stem is 30-50%.

5. Application of the reconstituted cut stem with a whole cut stem rate ≥85% and a low breakage rate as described in claim 1 or 2 in fine cigarette, medium cigarette, thick cigarette or electronic cigarette.

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