Preparation method of reconstituted tobacco as well as product and application of reconstituted tobacco

Abstract

The invention provides a preparation method of reconstituted tobacco as well as a product and application thereof. The preparation method comprises the following steps: (1) mixing and stirring tobacco powder, an inorganic filler, traditional Chinese medicine powder, an aroma enhancement component and water to obtain a granular viscous material; and (2) extruding, rolling and drying the viscous material to obtain the reconstituted tobacco sheet. According to the preparation method, a thick slurry method and a rolling method preparation technology are combined, the thick slurry method reconstituted tobacco has the advantages of being uniform in raw material component mixing and high in tensile strength and the characteristic that the reconstituted tobacco is easy to disperse after being added with water, secondary processing is conducted on the thick slurry method reconstituted tobacco, and the rolling method reconstituted tobacco is prepared; the problem that fiber substances are difficult to disperse due to small water adding amount in the process of preparing the reconstituted tobacco by adopting a rolling method is solved. The tensile strength of the reconstituted tobacco prepared through the method is far higher than that of reconstituted tobacco prepared through a traditional rolling method, and comprehensive utilization of thick slurry method reconstituted tobacco waste can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco, and in particular relates to a preparation method of reconstituted tobacco leaves and a product and application thereof. Background Art

[0002] The manufacture of reconstituted tobacco began in the 1950s. Compared with normal tobacco, it has much less aroma and impurities, and has the advantages of low cost, good filling and can reduce the tar content in smoke. It is currently widely used at home and abroad. It can be used in cigarettes at 20-30%, and has gradually become an important technical means for quality control of cigarette products. In the prior art, the preparation methods of reconstituted tobacco mainly include thick pulp method, roller pressing method, papermaking method, etc. Traditional cigarettes mostly use papermaking method reconstituted tobacco, and thick pulp method, roller pressing method and papermaking method reconstituted tobacco are all used in heated cigarettes.

[0003] CN118556897A discloses a thick slurry method reconstituted tobacco leaf, a preparation method thereof and cigarettes, and relates to the field of reconstituted tobacco leaf production. The thick slurry method reconstituted tobacco leaf raw material components are composed of tobacco powder, sugar, fiber, and adhesive, and can be directly used as an auxiliary material in traditional cigarettes, and has better filling performance and processing resistance than traditional thick slurry method reconstituted tobacco leaves, and at the same time has better sensory performance than papermaking method reconstituted tobacco leaves; the thick slurry method reconstituted tobacco leaf can also be used in new tobacco products that are heated without burning. Since the raw materials of the thick slurry method reconstituted tobacco leaf do not contain hydrophilic substances such as glycerol and propylene glycol, the difficulty of its production process is reduced, and it has the characteristics of good processing resistance, low cost, low storage requirements, etc., and is a new dual-purpose thick slurry method reconstituted tobacco leaf.

[0004] CN108065448A discloses a preparation method and application of heat-not-burn reconstituted tobacco leaves by a roller pressing method. The invention improves the process method based on the roller pressing method to prepare heat-not-burn reconstituted tobacco leaves, solves the problem of adding a large proportion of atomizers, and uses food-grade adhesives to evenly disperse and solidify the atomizers into tobacco materials. The prepared heat-not-burn reconstituted tobacco leaves have an increased atomizer content and are evenly distributed, with a non-sticky surface, and an increased fiber content, increased tensile strength, good processing resistance, uniform smoke release during smoking, good sensory effects, and a good simulated cigarette smoking experience.

[0005] However, the reconstituted tobacco produced by the roller pressing method has lower strength, higher specific gravity and lower filling performance. The reconstituted tobacco produced by the thick slurry method has a faster smoking speed than the roller pressing method, but the aroma persistence is worse than the roller pressing method. Therefore, in actual application, it will cause product quality fluctuations or affect consumers' sensory experience. Summary of the invention

[0006] In view of the deficiencies of the prior art, the object of the present invention is to provide a method for preparing reconstituted tobacco leaves and its products and applications.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for preparing reconstituted tobacco, the method comprising:

[0009] (1) mixing tobacco powder, inorganic filler, Chinese medicine powder, flavoring component and water to obtain a granular viscous material;

[0010] (2) The viscous material is extruded, rolled and dried to obtain the reconstituted tobacco leaf sheet.

[0011] The preparation method of the present invention combines the thick slurry method with the roller pressing method preparation technology, and utilizes the advantages of uniform mixing of raw material components and high tensile strength of thin sheets of thick slurry method reconstituted tobacco, and the characteristics of easy dispersion of reconstituted tobacco leaves after adding water, and performs secondary processing on the thick slurry method reconstituted tobacco leaves, and prepares them into roller pressing method reconstituted tobacco leaves, thereby overcoming the difficulty of using the roller pressing method to prepare reconstituted tobacco leaves, that is, the fiber material is difficult to disperse due to the small amount of water added, and the prepared roller pressing method reconstituted tobacco leaves have high tensile strength, and the adaptability of roller pressing method reconstituted tobacco leaves to machines is effectively improved. At the same time, by adding Chinese medicine powder and flavoring ingredients in the preparation process of the present invention, the aroma of the prepared reconstituted tobacco leaves can be made stronger and purer, and the impurities and irritation are smaller.

[0012] Preferably, the mass ratio of the tobacco powder raw material, inorganic filler, traditional Chinese medicine powder and flavoring ingredient in step (1) is (5-10):(0.5-2):(1-3):(0.1-1).

[0013] Wherein "5-10" can be 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9 or 9.5, etc.;

[0014] “0.5-2” can be 0.6, 0.8, 1.0, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0015] "1-3" can be 1.1, 1.3, 1.5, 1.7, 2, 2.1, 2.3, 2.5, 2.7 or 2.9, etc.;

[0016] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0017] Preferably, the mass ratio of the tobacco powder to water is 1:(0.2-0.6), for example, it can be 1:0.22, 1:0.25, 1:0.28, 1:0.3, 1:0.32, 1:0.35, 1:0.38, 1:0.4, 1:0.45, 1:0.5 or 1:0.58, etc.

[0018] Preferably, the raw material of the tobacco powder includes any one of thick pulp process reconstituted tobacco waste, tobacco stems or tobacco leaves, or a combination of at least two of them.

[0019] Preferably, the raw materials of the tobacco powder include thick slurry method recycled tobacco waste and tobacco leaves.

[0020] Preferably, the mixing in step (1) further comprises adding a smoke generating agent;

[0021] Preferably, the smoking agent comprises glycerol.

[0022] Preferably, the mass ratio of the tobacco powder to glycerol is (5-10):(0.1-1).

[0023] Wherein "5-10" can be 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9 or 9.5, etc.;

[0024] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0025] In the preparation method of the present invention, the raw materials of the tobacco powder are selected from the waste tobacco leaves recycled by the thick slurry method and tobacco leaves. The combination of the two can not only realize the comprehensive utilization of the waste tobacco leaves recycled by the thick slurry method, but also can make use of the characteristics of the recycled tobacco leaves containing fibers and adhesives, so that the tensile strength of the recycled tobacco leaves is higher, and the characteristics of the tobacco raw materials having rich aroma content, so that the sensory organs are better. In addition, for the waste tobacco leaves recycled by the thick slurry method, the current cigarette enterprises all adopt scrapping treatment, resulting in a waste of resources. The raw materials of the tobacco powder of the present invention are selected from the waste tobacco leaves recycled by the thick slurry method, which not only saves resources, but also has the effect of turning waste into treasure.

[0026] Preferably, the inorganic filler is any one of bentonite, lithium magnesium silicate, nano-alumina or nano-silicon oxide, or a combination of at least two of them.

[0027] Preferably, the inorganic filler is bentonite, lithium magnesium silicate, nano-alumina and nano-silicon oxide.

[0028] In the present invention, the flaky structure of the bentonite can improve the tensile strength of the reconstituted tobacco leaves, and can extend or block the path for the environmental water molecules to penetrate into the thin sheet, reduce the absorption of environmental moisture by the reconstituted tobacco leaves, and is beneficial to the stability of the physical indicators of the reconstituted tobacco leaves; the lithium magnesium silicate has thickening and thixotropy, and has strong adsorption capacity; the nano-alumina can make the mixed material obtain a good thickening effect at a low concentration; the nano-silicon oxide can improve the strength and flexibility of the reconstituted tobacco leaves. The combination of the four can not only make the tobacco powder more evenly dispersed, but also enhance the mechanical properties of the reconstituted tobacco leaves obtained in the end. In addition, when the reconstituted tobacco leaves are used as core materials for heating cigarettes, the nano-alumina can improve the thermal conductivity of the reconstituted tobacco leaves and promote the release rate of the smoke-generating agent and flavor components in the core materials.

[0029] Preferably, the mass ratio of bentonite, lithium magnesium silicate, nano-aluminum oxide and nano-silicon oxide is (3-6):(0.1-1):(1-2):(0.1-1).

[0030] Wherein "3-6" can be 3.2, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, 5.2, 5.5 or 5.8, etc.;

[0031] The first "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.;

[0032] "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0033] The second "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0034] Preferably, the Chinese medicine powder includes any one of astragalus powder, codonopsis powder, lily powder or chuanbei powder, or a combination of at least two of them.

[0035] Preferably, the Chinese medicine powder is Codonopsis pilosula powder, lily powder and Fritillaria cirrhosa powder.

[0036] In the present invention, the Chinese medicinal powder is selected from codonopsis pilosula powder, lily powder and fritillaria cirrhosa powder. The combination of the three has the effect of moistening the lungs, can not only better increase the aroma of the reconstituted tobacco leaves, but also can reduce the impurities and irritation thereof, and improve the sensory quality of the reconstituted tobacco leaves.

[0037] Preferably, the mass ratio of the codonopsis powder, lily powder and fritillaria powder is (1-2):(2-4):(1-2). The first "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0038] "2-4" can be 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6 or 3.8, etc.;

[0039] The second "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.

[0040] Preferably, the flavoring component comprises tobacco extract and / or fruit powder.

[0041] Preferably, the flavoring component comprises tobacco extract and fruit powder.

[0042] In the present invention, the use of tobacco extract and fruit powder as flavoring components can not only improve the aroma and taste of the reconstituted tobacco leaf slices, but also the tobacco extract has an adhesive effect, which can enhance the bonding effect of other materials and thus improve the mechanical properties of the final reconstituted tobacco leaf.

[0043] Preferably, the tobacco extract is Henan tobacco extract.

[0044] The Henan tobacco extract can supplement tobacco aroma, correct smoking taste, enhance taste and improve tobacco quality.

[0045] Preferably, the fruit powder comprises roxburgh powder and / or grapefruit powder.

[0046] Preferably, the fruit powder is grapefruit powder.

[0047] Preferably, the mass ratio of the tobacco extract to the grapefruit powder is 1:(0.5-1.5), for example, it can be 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3 or 1:1.4, etc.

[0048] Preferably, the stirring in step (1) is carried out in two stages.

[0049] Preferably, the speed of the first stage of stirring is 200-500rpm, and the time is 5-30min. For example, the speed may be 220rpm, 250rpm, 280rpm, 300rpm, 320rpm, 350rpm, 400rpm, 450rpm or 480rpm, and the time may be 6min, 10min, 15min, 20min, 25min or 28min, etc.

[0050] Preferably, the first stage of stirring is to mix the tobacco powder raw material, inorganic filler and traditional Chinese medicine powder to obtain a mixed material.

[0051] Preferably, the second stage stirring speed is 1000-3000rpm, and the time is 10-30min. For example, the speed may be 1200rpm, 1500rpm, 1800rpm, 2000rpm, 2200rpm, 2500rpm or 2800rpm, and the time may be 12min, 15min, 18min, 20min, 22min, 25min or 28min, etc.

[0052] Preferably, the second stage of stirring is to add the mixture of the flavoring component and water to the mixture stirred in the first stage for stirring.

[0053] Preferably, the extrusion in step (2) is carried out in a screw extruder.

[0054] Preferably, the roller pressure is 50-100 kgf / cm 2 , for example, it can be 55kgf / cm 2 、60kgf / cm 2 、65kgf / cm 2 、70kgf / cm 2 、75kgf / cm 2 、80kgf / cm 2 、85kgf / cm 2 、90kgf / cm 2 or 95kgf / cm 2 wait.

[0055] Preferably, the thickness of the rolled product is 0.1-0.3 mm, for example, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, 0.22 mm, 0.25 mm or 0.28 mm.

[0056] Preferably, the drying temperature is 70-130°C, for example, it can be 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C or 125°C, etc.

[0057] Preferably, the moisture content of the dried reconstituted tobacco leaves is 3-11%, for example, 3%, 4%, 5%, 6%, 7%, 8% or 10%.

[0058] Any specific point value within the above numerical range can be selected, and will not be described in detail here.

[0059] In a second aspect, the present invention provides a reconstituted tobacco leaf, wherein the reconstituted tobacco leaf is prepared by the method described in the first aspect.

[0060] In a third aspect, the present invention provides a use of the reconstituted tobacco leaves as described in the second aspect in preparing cigarettes.

[0061] Preferably, the cigarettes include traditional cigarettes and heated cigarettes.

[0062] In the present invention, the thick slurry process reconstituted tobacco waste can be reconstituted tobacco to which smoke-generating agents such as propylene glycol and glycerol have been added. If the thick slurry process reconstituted tobacco waste already contains smoke-generating agents, the reconstituted tobacco waste can be subjected to secondary processing and can be used for heating cigarettes without adding smoke-generating agents.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] The present invention combines the thick slurry method with the roller pressing method preparation technology, and utilizes the advantages of the thick slurry method reconstituted tobacco leaves, such as uniform mixing of raw material components, high tensile strength of reconstituted tobacco leaves, and the characteristics of easy dispersion of reconstituted tobacco leaves after adding water, to perform secondary processing on the thick slurry method reconstituted tobacco leaves, and prepare them into roller pressing method reconstituted tobacco leaves, thus overcoming the difficulty of using the roller pressing method to prepare reconstituted tobacco leaves, that is, the fiber material is difficult to disperse due to the small amount of water added. The tensile strength of reconstituted tobacco leaves prepared by the method is much higher than that of reconstituted tobacco leaves produced by the traditional roller pressing method, and the comprehensive utilization of waste materials of thick slurry method reconstituted tobacco leaves can be realized. DETAILED DESCRIPTION

[0065] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0066] The thick slurry reconstituted tobacco waste used in the following examples was provided by Jiangsu China Tobacco Industry Co., Ltd.

[0067] Tobacco extract (Yuyan extract) was purchased from Hubei Xinyuhong Biopharmaceutical Technology Co., Ltd.

[0068] The rest of the raw materials can be used as long as they are purchased from regular dealers.

[0069] Example 1

[0070] This embodiment provides a method for preparing reconstituted tobacco leaves, the preparation method comprising:

[0071] (1) Tobacco powder (thick slurry method recycled tobacco waste and tobacco in a mass ratio of 4:1), inorganic filler, Chinese medicine powder, flavoring ingredients and water (0.4 times the mass of tobacco powder) in a mass ratio of 8:1:1.5:0.5 are mixed and stirred to obtain a viscous material in a granular state, and the stirring is divided into two stages: the first stage of stirring is to stir the tobacco powder raw material, inorganic filler and Chinese medicine powder at 400 rpm for 20 minutes to obtain a mixed material, and the second stage of stirring is to add the mixture of flavoring ingredients and water to the mixed material stirred in the first stage and continue stirring at 2000 rpm for 20 minutes until it is granular;

[0072] The inorganic filler is bentonite, lithium magnesium silicate, nano-alumina and nano-silicon oxide in a mass ratio of 5:0.5:1.5:0.5;

[0073] The Chinese medicinal powder is codonopsis pilosula powder, lily powder and fritillaria cirrhosa powder in a mass ratio of 1:2:1;

[0074] The flavoring ingredients are Yuyan extract and grapefruit powder in a mass ratio of 1:1;

[0075] (2) adding the granular viscous material into a screw extruder to extrude an extruded material;

[0076] (3) The extruded material is heated to 80 kgf / cm 2 The tobacco leaves were rolled down to obtain reconstituted tobacco leaves with a thickness of 0.2 mm, and then dried at 120° C. to obtain reconstituted tobacco leaves with a moisture content of 7%.

[0077] Example 2

[0078] This embodiment provides a method for preparing reconstituted tobacco leaves, the preparation method comprising:

[0079] (1) Tobacco powder (thick slurry method recycled tobacco waste and tobacco in a mass ratio of 5:1), inorganic filler, Chinese medicine powder, flavoring ingredients and water (0.5 times the mass of the tobacco powder) in a mass ratio of 10:2:1:1 are mixed and stirred to obtain a viscous material in a granular state, and the stirring is carried out in two stages: the first stage of stirring is to stir the tobacco powder raw material, inorganic filler and Chinese medicine powder at 300 rpm for 25 minutes to obtain a mixed material, and the second stage of stirring is to add the mixture of the flavoring component and water to the mixed material stirred in the first stage and continue stirring at 1500 rpm for 30 minutes until it is in a granular state;

[0080] The inorganic filler is bentonite, lithium magnesium silicate, nano-alumina and nano-silicon oxide in a mass ratio of 6:1:1:1;

[0081] The Chinese medicinal powder is codonopsis pilosula powder, lily powder and fritillaria cirrhosa powder in a mass ratio of 1:3:1;

[0082] The flavoring ingredients are Yuyan extract and grapefruit powder in a mass ratio of 2:1;

[0083] (2) adding the granular viscous material into a screw extruder to extrude an extruded material;

[0084] (3) The extruded material is subjected to a pressure of 100 kgf / cm 2 The tobacco leaves were rolled and formed by roller pressing to obtain reconstituted tobacco leaves with a thickness of 0.15 mm, and then dried at 110° C. to obtain reconstituted tobacco leaves with a moisture content of 5%.

[0085] Example 3

[0086] This embodiment provides a method for preparing reconstituted tobacco leaves, the preparation method comprising:

[0087] (1) Tobacco powder (thick slurry method recycled tobacco waste and tobacco in a mass ratio of 3:1), inorganic filler, Chinese medicine powder, flavoring ingredients and water (0.2 times the mass of tobacco powder) in a mass ratio of 5:0.5:3:0.3 are mixed and stirred to obtain a viscous material in a granular state, and the stirring is divided into two stages: the first stage of stirring is to stir the tobacco powder raw material, inorganic filler and Chinese medicine powder at 500 rpm for 10 minutes to obtain a mixed material, and the second stage of stirring is to add the mixture of flavoring ingredients and water to the mixed material stirred in the first stage and continue stirring at 2500 rpm for 15 minutes until it is granular;

[0088] The inorganic filler is bentonite, lithium magnesium silicate, nano-alumina and nano-silicon oxide in a mass ratio of 3:0.3:2:0.3;

[0089] The Chinese medicinal powder is codonopsis pilosula powder, lily powder and fritillaria cirrhosa powder in a mass ratio of 1:4:1;

[0090] The flavoring ingredients are Yuyan extract and grapefruit powder in a mass ratio of 1:1.5;

[0091] (2) adding the granular viscous material into a screw extruder to extrude an extruded material;

[0092] (3) The extruded material is heated to 60 kgf / cm 2 The tobacco leaves were rolled and formed by roller pressing to obtain reconstituted tobacco leaves with a thickness of 0.25 mm, and then dried at 80° C. to obtain reconstituted tobacco leaves with a moisture content of 8%.

[0093] Example 4

[0094] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the inorganic filler in step (1) is lithium magnesium silicate, nano-alumina and nano-silicon oxide in a mass ratio of 1:3:1, and the amount of inorganic filler added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0095] Example 5

[0096] This embodiment provides a method for preparing reconstituted tobacco, which differs from Embodiment 1 only in that the inorganic filler in step (1) is bentonite, nano-alumina and nano-silicon oxide in a mass ratio of 5:1.5:0.5, and the amount of inorganic filler added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0097] Example 6

[0098] The present embodiment provides a method for preparing reconstituted tobacco leaves, which differs from the embodiment 1 only in that the inorganic filler in step (1) is bentonite, lithium magnesium silicate and nano silicon oxide in a mass ratio of 10:1:1, and the addition amount of the inorganic filler is kept unchanged, and the remaining steps are consistent with the embodiment 1.

[0099] Example 7

[0100] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the inorganic filler in step (1) is bentonite, lithium magnesium silicate and nano-alumina in a mass ratio of 10:1:3, and the amount of inorganic filler added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0101] Example 8

[0102] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the Chinese medicinal powder in step (1) is lily powder and Fritillaria cirrhosa powder in a mass ratio of 2:1, and the amount of Chinese medicinal powder added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0103] Example 9

[0104] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the Chinese medicinal powder in step (1) is Codonopsis pilosula powder and Fritillaria cirrhosa powder in a mass ratio of 1:1, and the amount of Chinese medicinal powder added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0105] Example 10

[0106] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the Chinese medicinal powder in step (1) is codonopsis pilosula powder and lily powder in a mass ratio of 1:2, and the amount of Chinese medicinal powder added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0107] Embodiment 11

[0108] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the flavoring ingredient in step (1) is Henan tobacco extract, and the amount of the flavoring ingredient added is kept unchanged, and the remaining steps are consistent with Embodiment 1.

[0109] Example 12

[0110] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the flavoring ingredient in step (1) is grapefruit powder, and the amount of the flavoring ingredient added remains unchanged, and the remaining steps are consistent with Embodiment 1.

[0111] Example 13

[0112] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the mixing in step (1) further includes adding glycerol, and the amount added is consistent with the flavoring component, and the remaining steps are consistent with Embodiment 1.

[0113] Embodiment 14

[0114] This embodiment provides a method for preparing reconstituted tobacco leaves, which differs from Embodiment 1 only in that the raw materials and dosages of the reconstituted tobacco leaves are the same as those of Embodiment 1, except that the reconstituted tobacco leaves do not contain waste reconstituted tobacco leaves produced by the thick slurry method. The reconstituted tobacco leaves are produced by the roller pressing method as described in Embodiment 1.

[0115] Comparative Example 1

[0116] This comparative example provides a method for preparing reconstituted tobacco leaves. The raw materials and dosages for preparing the reconstituted tobacco leaves are the same as those in Example 1, except that the reconstituted tobacco leaf waste produced by the thick slurry method is not contained (if the reconstituted tobacco leaf waste produced by the thick slurry method is added, the product cannot be formed after the thick slurry method is used). The reconstituted tobacco leaves are prepared by the thick slurry method.

[0117] The steps of preparing reconstituted tobacco by thick slurry method are as follows: mix tobacco powder, inorganic filler and Chinese medicine powder, then add a mixture of flavoring ingredients and water, apply the mixture on an endless steel belt and dry to obtain thick slurry method reconstituted tobacco. In order to achieve the preparation effect of thick slurry method reconstituted tobacco, the amount of water applied is increased, wherein the mass ratio of tobacco powder to water is 1:4, and a certain amount of wood pulp fiber and CMC are added, wherein the mass ratio of tobacco powder to wood pulp fiber and CMC is 25:1:1.

[0118] Comparative Example 2

[0119] This comparative example provides a method for preparing reconstituted tobacco leaves. The difference between the preparation method and Example 1 is that the preparation raw materials do not include Chinese medicinal powder, and the reduced amount is supplemented by flavoring ingredients. The remaining steps are consistent with Example 1.

[0120] Comparative Example 3

[0121] This comparative example provides a method for preparing reconstituted tobacco leaves. The difference between the preparation method and Example 1 is that the preparation raw materials do not include flavoring ingredients, and the reduced amount is supplemented by traditional Chinese medicine powder. The remaining steps are consistent with Example 1.

[0122] Test Example 1

[0123] The tensile strength test was performed on the reconstituted tobacco leaves of Examples 1-14 and Comparative Examples 1-3, wherein the test was performed with reference to the determination of tensile strength of paper and paperboard in GB / T12914-2008. The test results are shown in Table 1.

[0124] Table 1

[0125]

[0126]

[0127] As shown in Table 1, the reconstituted tobacco leaf sheet obtained by the method of the present invention has better tensile strength and thus better processability than the product obtained by the roller pressing method in Example 14 or the thick slurry method in Comparative Example 1.

[0128] It can be seen from Examples 4-7 that the selection of inorganic filler has an impact on the mechanical processing properties of the reconstituted tobacco leaf sheet;

[0129] It can be seen from Example 12 that the use of tobacco extract in the flavoring ingredient can improve the adhesion during the preparation of reconstituted tobacco leaf sheets, thereby improving the mechanical properties of the final product.

[0130] It can be seen from Example 14 that when the raw materials do not contain thick pulp method reconstituted tobacco waste, the tensile strength of the final product is significantly worse;

[0131] It can be seen from Comparative Example 1 that the tensile strength of the reconstituted tobacco obtained by the traditional thick slurry method is also significantly poorer.

[0132] Test Example 2

[0133] Sensory evaluation experiment

[0134] Evaluation method: After the reconstituted tobacco leaf slices of Examples 1-14 and Comparative Examples 1-3 were shredded, 7 smokers conducted sensory evaluation using the same cigarette material with reference to the national standard GB 5606.4-2005 Cigarette Part 4: Sensory Technical Requirements. The test standards refer to Table 2. The final results were recorded as the average score of all the participants. The results are shown in Table 3.

[0135] Table 2

[0136]

[0137] Table 3

[0138]

[0139]

[0140] As can be seen from Table 3, the reconstituted tobacco leaf slices of Examples 1-3 have a full and rich aroma, a mellow smoke flavor, no obvious odor, weak irritation and dryness, and a clean aftertaste. This is because the thin slice fiber material prepared by the specific method of the present invention is more evenly dispersed, so it burns more evenly, reduces impurities, and the fullness and purity of the aroma are improved by the flavoring ingredients and Chinese medicine powder.

[0141] It can be seen from Examples 8-10 and Comparative Example 2 that the addition of Chinese medicinal powder can significantly improve the aroma of reconstituted tobacco leaves, reduce irritation and impurities, and the codonopsis powder, lily powder and Fritillaria powder in the Chinese medicinal powder have a synergistic effect on the above effects;

[0142] It can be seen from Examples 11-12 and Comparative Example 3 that only by adding flavoring ingredients and synergistically combining tobacco extract and grapefruit powder in the synergistic ingredients can the aroma of the slices be stronger and the dryness be lower.

[0143] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the preparation method of a reconstituted tobacco leaf of the present invention, its product and application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0144] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0145] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A method for preparing reconstituted tobacco, characterized in that: The preparation method comprises: (1) mixing tobacco powder, inorganic filler, Chinese medicine powder, flavoring component and water to obtain a granular viscous material; (2) The viscous material is extruded, rolled and dried to obtain the reconstituted tobacco leaves.

2. The method for preparing reconstituted tobacco according to claim 1, characterized in that: The mass ratio of the tobacco powder raw material, inorganic filler, traditional Chinese medicine powder and flavoring component in step (1) is (5-10):(0.5-2):(1-3):(0.1-1); Preferably, the mass ratio of the tobacco powder to water is 1:(0.2-0.6); Preferably, the raw material of the tobacco powder includes any one of thick pulp process reconstituted tobacco waste, tobacco stems or tobacco leaves, or a combination of at least two thereof; Preferably, the raw materials of the tobacco powder include waste tobacco leaves and tobacco leaves; Preferably, the mixing in step (1) further comprises adding a smoke generating agent; Preferably, the smoking agent comprises glycerol; Preferably, the mass ratio of the tobacco powder to glycerol is (5-10):(0.1-1).

3. The method for preparing reconstituted tobacco according to claim 1 or 2, characterized in that: The inorganic filler is any one of bentonite, lithium magnesium silicate, nano-alumina or nano-silicon oxide, or a combination of at least two thereof; Preferably, the inorganic filler is bentonite, lithium magnesium silicate, nano-alumina and nano-silicon oxide; Preferably, the mass ratio of bentonite, lithium magnesium silicate, nano-aluminum oxide and nano-silicon oxide is (3-6):(0.1-1):(1-2):(0.1-1).

4. The method for preparing reconstituted tobacco according to any one of claims 1 to 3, characterized in that: The Chinese medicine powder includes any one of astragalus powder, codonopsis powder, lily powder or chuanbei powder, or a combination of at least two of them; Preferably, the Chinese medicine powder is codonopsis powder, lily powder and fritillaria powder; Preferably, the mass ratio of the codonopsis pilosula powder, lily powder and fritillaria cirrhosa powder is (1-2):(2-4):(1-2).

5. The method for preparing reconstituted tobacco according to any one of claims 1 to 4, characterized in that: The flavoring component includes tobacco extract and / or fruit powder; Preferably, the flavoring component comprises tobacco extract and fruit powder; Preferably, the tobacco extract is Henan tobacco extract; Preferably, the fruit powder comprises roxburgh powder and / or grapefruit powder; Preferably, the fruit powder is grapefruit powder; Preferably, the mass ratio of the tobacco extract to the grapefruit powder is 1:(0.5-1.5).

6. The method for preparing reconstituted tobacco according to any one of claims 1 to 5, characterized in that: The stirring in step (1) is carried out in two stages; Preferably, the first stage of stirring has a speed of 200-500 rpm and a time of 5-30 min; Preferably, the second stage of stirring has a rotation speed of 1000-3000 rpm and a stirring time of 10-30 min.

7. The method for preparing reconstituted tobacco according to any one of claims 1 to 6, characterized in that: The extrusion in step (2) is carried out in a screw extruder; Preferably, the roller pressure is 50-100 kgf / cm 2 ; Preferably, the thickness of the product after rolling is 0.1-0.3 mm.

8. The method for preparing reconstituted tobacco according to any one of claims 1 to 7, characterized in that: The drying temperature is 70-130°C; Preferably, the moisture content of the dried reconstituted tobacco leaves is 3-11%.

9. A reconstituted tobacco leaf, characterized in that: The reconstituted tobacco leaf is prepared by the method according to any one of claims 1 to 8.

10. Use of the reconstituted tobacco leaf according to claim 9 in preparing cigarettes.

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