A method for preparing reconstituted tobacco leaf and products and uses thereof

Abstract

The application provides a preparation method of reconstituted tobacco leaf, and products and applications thereof. The preparation method comprises the following steps: (1) extracting a first tobacco raw material in water, and then performing solid-liquid separation to obtain a liquid phase and a solid phase; concentrating the liquid phase to obtain a concentrated liquid; mixing the concentrated liquid with a material liquid modifier to obtain a first spraying liquid; mixing the solid phase with an additional fiber, and then performing beating treatment and papermaking treatment to obtain a base sheet; mixing tobacco powder prepared from a second tobacco raw material with a smoking agent and an adhesive in water to obtain a second spraying liquid; and (2) spraying the first spraying liquid on one side of the base sheet, and spraying the second spraying liquid on the other side of the base sheet, and then drying to obtain the reconstituted tobacco leaf. The preparation method provided by the application separately applies concentrated liquid and tobacco raw material with different characteristics to the product, so that the product has the characteristics of good aroma quality and comfortable taste while meeting the high satisfaction and concentration.

Description

Technical Field

[0001] This invention belongs to the field of cigarette technology, specifically relating to a method for preparing reconstituted tobacco leaves, its products, and applications. Background Technology

[0002] Reconstituted tobacco technology uses tobacco stems, tobacco fragments, tobacco dust, tobacco sticks and other tobacco substances as raw materials, and processes them using papermaking technology to produce products with tobacco-like aromas. Reconstituted tobacco has been widely used in the tobacco industry due to its good processing resistance, significant tar reduction effect and strong product quality plasticity.

[0003] The aroma components of reconstituted tobacco mainly come from the concentrate. In fact, in the traditional dip-coating reconstituted tobacco process, the aroma components in the raw tobacco are significantly lost during extraction and concentration. Therefore, compared to raw tobacco, traditional reconstituted tobacco products usually have a weaker aroma and a stronger off-flavor. On the other hand, the coating rate of traditional dip-coating reconstituted tobacco is only 30-45%, significantly lower than the water-soluble substances (50-60%) contained in the raw tobacco, which also leads to a difference in sensory quality between the product and the raw tobacco. Simply increasing the coating rate will cause the surface viscosity of the product to increase due to the limited absorbency of the substrate, resulting in difficulties in slitting and surface adhesion.

[0004] Some researchers have tried to improve the intrinsic quality of traditional reconstituted tobacco products by adding tobacco powder. However, this process has several drawbacks. First, the addition of tobacco powder requires the use of adhesives, which can negatively impact the product's sensory quality. Second, both the slurry and papermaking processes require a substrate of sufficient strength for the application of tobacco powder in reconstituted tobacco. Since the substrate is primarily made from tobacco pulp with very low soluble content and added fibers, it's impossible to achieve the same proportion of hot water solubles as the raw tobacco, regardless of the amount of tobacco powder added. Consequently, the sensory quality will also differ significantly from that of the raw tobacco leaf.

[0005] For heated cigarettes, in order to improve their quality and consistency of the smoking experience, a larger amount of filler material needs to be added to the cigarette. However, this can lead to blockage of the airflow channels, increased draw resistance, and ultimately affect the smoking effect. Therefore, it is also necessary to optimize the effective components and physical structure of reconstituted tobacco filler material.

[0006] Therefore, based on meeting the requirements of production line processing and heated cigarette forming, developing a high-quality reconstituted tobacco processing method that can achieve the proportion of effective aroma substances in tobacco raw materials is of great significance for improving the applicability of traditional reconstituted tobacco formulations and the sensory quality of reconstituted tobacco core material for heated cigarettes. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for preparing reconstituted tobacco leaves, as well as its products and applications.

[0008] To achieve this objective, the present invention employs the following technical solution:

[0009] In a first aspect, the present invention provides a method for preparing reconstituted tobacco leaves, the method comprising:

[0010] (1) After extracting the first tobacco raw material in water, the solid and liquid phases are separated to obtain a liquid phase and a solid phase. The liquid phase is concentrated to obtain a concentrated liquid. The concentrated liquid is mixed with a liquid modifier to obtain a first spraying liquid.

[0011] The solid material is mixed with added fibers and then subjected to pulping and papermaking processes to prepare a substrate.

[0012] The second tobacco powder is made from the second tobacco raw material, and then mixed with a smoke generator and an adhesive in water to obtain the second spraying liquid;

[0013] (2) Spray one side of the substrate with the first spray liquid and the other side with the second spray liquid, and then dry to obtain the reconstituted tobacco leaf.

[0014] The first and second spraying liquids prepared by the preparation method provided by this invention are applied to the product, so that the product has good aroma and pleasant taste while having a high level of satisfaction and concentration. Moreover, by adding other auxiliary materials such as smoke-generating agents and liquid modifiers, the intrinsic quality of reconstituted tobacco products is improved, the morphology of tobacco shreds in heated cigarette core material is optimized, the smoke-generating effect is increased, and the product adhesion problem is reduced, thus ensuring the product's processability.

[0015] Furthermore, the first coating liquid sprayed on one side of the reconstituted tobacco leaf of this invention has good smoothness, while the second coating liquid on the other side is rougher because it is directly obtained by mixing tobacco powder, smoking agent, and adhesive. As a result, during the cigarette core material forming process, the smooth surface will come into contact with the rough surface, opening a smooth channel for the flow of smoke. Therefore, while reducing the draw resistance, it further improves the smoking effect. Compared with conventional heated cigarette core materials, which are either smooth on both sides with close contact between tobacco shreds, or rough on both sides with a tight interlocking pattern, both of which affect the flow of smoke, this invention has good application and promotion effects.

[0016] Preferably, the mass ratio of the first tobacco raw material to water is 1:(5-10), for example, it can be 1:5, 1:6, 1:7, 1:8, 1:9 or 1:10, etc.

[0017] Preferably, the extraction temperature is 40-80℃ and the time is 0.5-1.5h. For example, the temperature can be 42℃, 45℃, 48℃, 50℃, 52℃, 55℃, 58℃, 60℃, 63℃, 65℃, 67℃, 70℃, 73℃, 75℃, 77℃ or 79℃, etc., and the time can be 0.6h, 0.7h, 0.8h, 0.9h, 1h, 1.1h, 1.2h, 1.3h or 1.4h, etc.

[0018] Preferably, the concentration is reduced to a density of 1.0-1.5 g / mL, for example, 1.05 g / mL, 1.1 g / mL, 1.15 g / mL, 1.2 g / mL, 1.25 g / mL, 1.3 g / mL, 1.32 g / mL, 1.35 g / mL, 1.4 g / mL, 1.45 g / mL, or 1.5 g / mL.

[0019] Preferably, by weight, the first spraying liquid comprises 70-90 parts of concentrate and 0.01-0.2 parts of liquid modifier.

[0020] The amount of concentrated liquid added in the first spraying liquid of the present invention can be 71 parts, 73 parts, 75 parts, 77 parts, 79 parts, 80 parts, 83 parts, 85 parts, 87 parts or 89 parts, etc.

[0021] The amount of the liquid modifier added can be 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.2 parts, 0.5 parts, 0.8 parts, 1 part, 1.2 parts, 1.5 parts, 1.7 parts, or 1.9 parts, etc.

[0022] Preferably, the first spray liquid also includes a smoke generator.

[0023] Preferably, the first spray liquid further includes 0.1-20 parts of a smoke generator by weight, for example, 0.5 parts, 0.8 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 15 parts, 17 parts or 19 parts, etc.

[0024] Preferably, by weight, the second spray liquid comprises 10-30 parts tobacco powder, 0.1-20 parts smoke generator, 0.5-5 parts adhesive, and 60-99 parts water.

[0025] The amount of tobacco powder added in the second spraying liquid of the present invention can be 12 parts, 15 parts, 17 parts, 19 parts, 20 parts, 22 parts, 25 parts, 27 parts or 29 parts, etc.

[0026] The amount of the smoke-generating agent can be 0.5 parts, 0.8 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 15 parts, 17 parts, or 19 parts, etc.

[0027] The amount of adhesive added can be 0.8 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, or 4.5 parts, etc.;

[0028] The amount of water added can be 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts, or 95 parts, etc.

[0029] Preferably, the first tobacco raw material includes any one or a combination of at least two of flue-cured tobacco, sun-cured tobacco, or burley tobacco.

[0030] The first tobacco raw material selected in this invention performs well in terms of smoke concentration and satisfaction.

[0031] Preferably, the second tobacco raw material includes flue-cured tobacco.

[0032] The second tobacco raw material selected in this invention performs well in terms of aroma and comfort.

[0033] Preferably, the smoke-generating agent in the first or second spray liquid independently includes any one or a combination of at least two of glycerol, propylene glycol, 1,3-butanediol, xylitol, and polyethylene glycol.

[0034] Preferably, the smoke generator in the first or second spray liquid is a combination of glycerol, 1,3-butanediol and xylitol.

[0035] In this invention, glycerol, 1,3-butanediol and xylitol are selected as smoke-generating agents. The combination of the three not only increases the amount of smoke generated by heated cigarettes and increases consumer satisfaction, but also enhances the sweet aroma of the smoke, thereby improving the taste of the product after it is used in cigarettes.

[0036] Preferably, the mass ratio of glycerol, 1,3-butanediol and xylitol is (1-3):(0.5-1.5):(0.1-1).

[0037] The values ​​“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.

[0038] "0.5-1.5" can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3 or 1.4, etc.;

[0039] "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0040] Preferably, the adhesive comprises sodium carboxymethyl cellulose.

[0041] Preferably, the feed modifier includes polydimethylsiloxane.

[0042] In this invention, the liquid modifier is polydimethylsiloxane, which can not only effectively reduce the viscosity and surface tension of the liquid and increase the leveling properties of the liquid, thus improving the absorption effect of the substrate on the soluble components of the liquid; but also has a certain defoaming effect, improving the uniformity of liquid spraying.

[0043] Preferably, by weight, 0.1-5 parts of a fragrance composition are independently added to the first or second spray liquid, for example, 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts or 4.5 parts, etc.

[0044] Preferably, the fragrance composition in the first or second spray liquid independently includes a combination of at least two of orange extract, dried tangerine peel extract, green tea extract, or coffee extract.

[0045] Preferably, the fragrance composition in the first or second spray liquid is a combination of tobacco flavoring, orange extract, dried tangerine peel extract, green tea extract and coffee extract.

[0046] In this invention, the tobacco flavoring, orange extract, tangerine peel extract, green tea extract, and coffee extract are all rich in polysaccharides and volatile oils. The five ingredients work synergistically to increase the smoke concentration of reconstituted tobacco leaves, improve the quality of the smoke, reduce throat irritation, improve the smoke induction and aftertaste in the mouth, and increase the sweetness in the mouth, thus having a good application effect.

[0047] Preferably, the mass ratio of the tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract is (1-5):(2-5):(1-2):(1-3):(0.1-1).

[0048] The numbers “1-5” can be 1.1, 1.3, 1.5, 1.7, 2, 2.3, 2.5, 2.7, 3, 3.2, 3.5, 3.7, 3.9, 4, 4.2, 4.5, 4.7 or 4.9, etc.

[0049] “2-5” can be 2.1, 2.3, 2.5, 2.7, 3, 3.2, 3.5, 3.7, 3.9, 4, 4.2, 4.5, 4.7 or 4.9, etc.;

[0050] “1-2” can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0051] "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.;

[0052] "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0053] Preferably, the added fiber includes any one or a combination of at least two of coniferous wood fiber, broadleaf wood fiber, or flax fiber.

[0054] Preferably, the mass ratio of the solid to the added fiber is 1:(0.25-4), for example, it can be 1:0.3, 1:0.5, 1:0.75, 1:1, 1:1.5, 1:2, 1:2.5, 1:3 or 1:3.5, etc.

[0055] Preferably, the freeness of the mixed pulp after beating is 30-80°SR, for example, it can be 35°SR, 40°SR, 45°SR, 50°SR, 55°SR, 60°SR, 65°SR, 70°SR or 75°SR, etc.

[0056] Preferably, the substrate has a unit weight of 20-60 g / m³. 2 For example, it can be 25g / m 2 30g / m 2 35g / m 2 40g / m 2 45g / m 2 50g / m 2 Or 55g / m 2 wait.

[0057] Preferably, in step (2), the spraying amount of the first or second spraying liquid is independently 20-80 g / m³. 2 For example, it can be 25g / m 2 30g / m 2 35g / m 2 40g / m 2 45g / m 2 50g / m 2 55g / m 2 60g / m 2 65g / m 2 70g / m 2 Or 75g / m 2 wait.

[0058] Preferably, the drying temperature in step (2) is 60-120℃, for example, it can be 60℃, 70℃, 82℃, 85℃, 88℃, 90℃, 92℃, 95℃, 98℃, 110℃, 120℃, etc.

[0059] Secondly, the present invention provides a reconstituted tobacco leaf, which is prepared by the reconstituted tobacco leaf preparation method as described in the first aspect.

[0060] Thirdly, the present invention provides an application of reconstituted tobacco leaves as described in the second aspect in cigarette production.

[0061] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] (1) The first and second spraying liquids prepared by the preparation method provided by the present invention are applied to the product, so that the product has good aroma and comfortable taste while having a high level of satisfaction and concentration. At the same time, by adding a liquid modifier, the uniformity of the spraying liquid and its penetration effect in the substrate are improved, thus improving the internal quality and smoking effect of the reconstituted tobacco product.

[0064] (2) The second spray liquid for one side of the reconstituted tobacco leaf prepared by the present invention contains a large amount of tobacco powder, which enhances the aroma and reduces the adhesion problem caused by the excessive coating rate of the reconstituted tobacco leaf prepared by dip coating. The first spray liquid for the other side is obtained by concentrating tobacco raw materials. Compared with reconstituted tobacco leaves with tobacco powder added as an effective substance, it has a higher content of hot water soluble substances (i.e. effective tobacco substances), which can reach or even exceed the level of tobacco raw materials.

[0065] (3) The first spray liquid sprayed on one side of the reconstituted tobacco leaf of the present invention has good flatness, while the second spray liquid on the other side is rougher because it is directly obtained by mixing tobacco powder with smoking agent and adhesive. The flat surface will come into contact with the rough surface, opening a smooth channel for the flow of smoke. Therefore, the smoking effect is improved while reducing the suction resistance.

[0066] (4) The method of the present invention can effectively reduce the problems of caking of traditional reconstituted tobacco products and moisture absorption and adhesion of heated cigarette core products, ensuring the processing resistance of the products and having good application and promotion effects. Detailed Implementation

[0067] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0068] The formulation of the first tobacco raw material used in the following embodiments and comparative examples of the present invention is as follows: 30% Hunan Yongzhou flue-cured tobacco, 30% Hunan Changsha sun-cured yellow tobacco, 20% Hubei Enshi burley tobacco, and 20% American flue-cured tobacco;

[0069] The second tobacco raw material formula consists of 50% Yunnan Dali flue-cured tobacco, 30% Guizhou Bijie flue-cured tobacco, and 20% Argentine flue-cured tobacco;

[0070] The tobacco flavoring was purchased from Henan Xinqiao Tobacco Technology Service Co., Ltd.

[0071] The polydimethylsiloxane was purchased from Jinan Xinglongda Chemical Co., Ltd.

[0072] The sodium carboxymethyl cellulose was purchased from Hengda Chemical Technology Taizhou Co., Ltd.

[0073] The orange extract was purchased from Henan Xinqiao Tobacco Technology Service Co., Ltd.

[0074] The tangerine peel extract was purchased from Henan Xinqiao Tobacco Technology Service Co., Ltd.

[0075] The green tea extract was purchased from Henan Xinqiao Tobacco Technology Service Co., Ltd.

[0076] The coffee extract was purchased from Henan Xinqiao Tobacco Technology Service Co., Ltd.

[0077] The raw materials used in the following examples and comparative examples can be used as long as they are purchased from authorized distributors.

[0078] Example 1

[0079] This embodiment provides a reconstituted tobacco leaf, the preparation method of which is as follows:

[0080] (1) The first tobacco raw material was added to water (solid-liquid ratio of 1:5) and extracted at 70°C for 1 hour. After solid-liquid separation, liquid and solid phases were obtained. The liquid phase was concentrated to obtain a concentrated liquid (1.2 g / mL). It was mixed with a smoking agent, polydimethylsiloxane, and flavor composition to prepare a first spraying liquid. The amount of each component added was: 83 parts of concentrated liquid, 20 parts of smoking agent, 0.05 parts of polydimethylsiloxane, and 1.5 parts of flavor composition. The smoking agent was glycerol, 1,3-butanediol and xylitol in a mass ratio of 2:1:0.5. The flavor composition was tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:4:1.5:2:0.5.

[0081] (2) The tobacco raw material 2 is ground into tobacco powder, and then mixed with a smoke-generating agent, sodium carboxymethyl cellulose and water to prepare a second spraying liquid. The amount of each component added is 12.9 parts of tobacco powder, 6 parts of smoke-generating agent, 0.6 parts of carboxymethyl cellulose, 1.5 parts of flavor composition and 79 parts of water. The smoke-generating agent is glycerol, 1,3-butanediol and xylitol in a mass ratio of 2:1:0.5. The flavor composition is tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:4:1.5:2:0.5.

[0082] (3) The solid material from step (1) is pulped with coniferous wood fiber (mass ratio 1:1) and formed into a substrate, wherein the freeness of the mixed pulp is 50°SR and the basis weight of the substrate is 40 g / m³. 2 ;

[0083] (4) The first coating liquid is first sprayed onto one side of the substrate, with a coating amount of 80g / m². 2 Dry; then spray the second coating liquid onto the other side of the substrate at a rate of 40 g / m². 2 Then, the reconstituted tobacco leaves are obtained by drying at 90°C.

[0084] Example 2

[0085] This embodiment provides a reconstituted tobacco leaf, the preparation method of which is as follows:

[0086] (1) The first tobacco raw material was added to water (solid-liquid ratio of 1:10) and extracted at 60°C for 1.5 h. After solid-liquid separation, liquid and solid phases were obtained. The liquid phase was concentrated to obtain a concentrated liquid (1.3 g / mL). It was mixed with a smoking agent, polydimethylsiloxane and flavor composition to prepare a first spraying liquid. The amount of each component added was: 75 parts of concentrated liquid, 20 parts of smoking agent, 0.06 parts of polydimethylsiloxane and 2 parts of flavor composition. The smoking agent was glycerol, 1,3-butanediol and xylitol in a mass ratio of 3:0.5:1. The flavor composition was tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:5:1:3:0.3.

[0087] (2) The second tobacco raw material is ground into tobacco powder, and then mixed with a smoking agent, sodium carboxymethyl cellulose, flavoring and water to prepare a second spraying liquid. The amount of each component added is 20 parts of tobacco powder, 10 parts of smoking agent, 1 part of sodium carboxymethyl cellulose, 1 part of flavoring composition and 68 parts of water. The smoking agent is glycerol, 1,3-butanediol and xylitol in a mass ratio of 1:1.5:0.3. The flavoring composition is tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:2:2:1:1.

[0088] (3) The solid material from step (1) is pulped with coniferous wood fiber (mass ratio 1:4) and formed into a substrate, wherein the freeness of the mixed pulp is 40°SR and the basis weight of the substrate is 60 g / m³. 2 ;

[0089] (4) The first spraying liquid is first sprayed onto one side of the substrate, with a spraying amount of 40g / m². 2 Dry; then spray the second coating liquid onto the other side of the substrate at a rate of 80 g / m². 2 Then, the reconstituted tobacco leaves are obtained by drying at 80°C.

[0090] Example 3

[0091] This embodiment provides a reconstituted tobacco leaf, the preparation method of which is as follows:

[0092] (1) The first tobacco raw material was added to water (solid-liquid ratio of 1:8) and extracted at 80°C for 0.5 h. After solid-liquid separation, liquid and solid phases were obtained. The liquid phase was concentrated to obtain a concentrated liquid (1.25 g / mL). It was mixed with a smoking agent, polydimethylsiloxane and flavor composition to prepare a first spraying liquid. The amount of each component added was: 85 parts of concentrated liquid, 20 parts of smoking agent, 0.04 parts of polydimethylsiloxane and 3 parts of flavor composition. The smoking agent was glycerol, 1,3-butanediol and xylitol in a mass ratio of 1:1.5:0.3. The flavor composition was tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:2:2:1:1.

[0093] (2) The second tobacco raw material is ground into tobacco powder, which is then mixed with a smoking agent, sodium carboxymethyl cellulose, flavoring, and water to prepare a second spraying liquid. The amount of each component added is 25 parts of tobacco powder, 12 parts of smoking agent, 1.5 parts of sodium carboxymethyl cellulose, 0.5 parts of flavoring composition, and 58 parts of water. The smoking agent is glycerol, 1,3-butanediol and xylitol in a mass ratio of 3:0.5:1. The flavoring composition is tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:1:1.5:0.3.

[0094] (3) The solid material from step (1) is pulped with coniferous wood fiber (mass ratio 4:1) and formed into a substrate. The freeness of the mixed pulp is 80°SR, and the basis weight of the substrate is 20 g / m³. 2 ;

[0095] (4) The first spraying liquid is first sprayed onto one side of the substrate, with a spraying amount of 50g / m². 2 Dry; then spray the second coating liquid onto the other side of the substrate at a rate of 50 g / m². 2 Then, the reconstituted tobacco leaves are obtained by drying at 100°C.

[0096] Example 4

[0097] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Embodiment 1 is that the smoking agent in steps (1) and (2) is glycerol and 1,3-butanediol in a mass ratio of 2:1, and the amount of smoking agent is kept unchanged. The amount of other components, process steps, and parameters are the same as those in Embodiment 1.

[0098] Example 5

[0099] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Embodiment 1 is that the smoking agents in steps (1) and (2) are glycerol and xylitol with a mass ratio of 2:0.5, and the amount of smoking agent is kept unchanged. The amount of other components, as well as the process steps and parameters, are the same as those in Embodiment 1.

[0100] Example 6

[0101] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the smoking agents in steps (1) and (2) are 1,3-butanediol and xylitol with a mass ratio of 1:0.5, and the amount of smoking agent is kept unchanged. The amount of other components, as well as the process steps and parameters, are the same as those in Example 1.

[0102] Example 7

[0103] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Embodiment 1 is that neither the first spraying liquid nor the second spraying liquid contains the flavor composition. The dosage of the remaining components, as well as the process steps and parameters, are the same as those in Embodiment 1.

[0104] Example 8

[0105] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the flavor composition in the first and second spraying liquids is tobacco flavoring, orange extract, tangerine peel extract and green tea extract in a mass ratio of 2:4:1.5:2, and the amount of flavor composition remains unchanged. The amount of other components, as well as the process steps and parameters, are the same as in Example 1.

[0106] Example 9

[0107] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the flavor composition in the first and second spraying liquids is tobacco flavoring, orange extract, tangerine peel extract and coffee extract in a mass ratio of 2:4:1.5:0.5, and the amount of flavor composition remains unchanged. The amount of other components, as well as the process steps and parameters, are the same as in Example 1.

[0108] Example 10

[0109] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the flavor composition in the first and second spraying liquids is tobacco flavoring, orange extract, green tea extract and coffee extract in a mass ratio of 2:4:2:0.5, and the amount of flavor composition remains unchanged. The amount of other components, as well as the process steps and parameters, are the same as those in Example 1.

[0110] Example 11

[0111] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the flavor composition in the first and second spraying liquids is tobacco flavoring, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:1.5:2:0.5, and the amount of flavor composition remains unchanged. The amount of other components, as well as the process steps and parameters, are the same as those in Example 1.

[0112] Example 12

[0113] This embodiment provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and that of Example 1 is that the aroma composition in both the first and second spraying liquids is orange extract, tangerine peel extract, green tea extract and coffee extract in a ratio of 4:1.5:2:0.5, and the amount of aroma composition remains unchanged. The amount of other components, as well as the process steps and parameters, are the same as in Example 1.

[0114] Example 13

[0115] This embodiment provides a reconstituted tobacco leaf. The only difference between the preparation method of the reconstituted tobacco leaf and that of Embodiment 1 is that no smoke-generating agent is added to the first spraying liquid, and the reduction is made up by the concentrate. The remaining steps and process parameters are consistent with those of Embodiment 1.

[0116] Comparative Example 1

[0117] This comparative example provides a reconstituted tobacco leaf, the preparation method of which is as follows:

[0118] (1) The first tobacco raw material was added to water (solid-liquid ratio of 1:15) and extracted at 70°C for 1 hour. After solid-liquid separation, liquid and solid phases were obtained. The liquid phase was concentrated to obtain a concentrated liquid (1.2 g / mL). It was mixed with a smoking agent, polydimethylsiloxane and flavoring to prepare a first spraying liquid. The amount of each component added was: 83 parts of concentrated liquid, 20 parts of smoking agent, 0.05 parts of polydimethylsiloxane, and 1.5 parts of flavoring composition. The smoking agent was glycerol, 1,3-butanediol and xylitol in a mass ratio of 2:1:0.5. The flavoring composition was tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:4:1.5:2:0.5.

[0119] (2) The solid material from step (1) is pulped with coniferous wood fiber (mass ratio 1:1) and formed into a substrate. The freeness of the mixed pulp is 50°SR, and the basis weight of the substrate is 40 g / m³. 2 ;

[0120] (3) The first spraying liquid is first sprayed onto one side of the substrate, with a spraying amount of 80g / m². 2 After one side of the coating dries, spray the coating onto the other side of the substrate, with a coating amount of 40g / m². 2 Then, the reconstituted tobacco leaves are obtained by drying at 90°C.

[0121] Comparative Example 2

[0122] This comparative example provides a reconstituted tobacco leaf, the preparation method of which is as follows:

[0123] (1) The second tobacco raw material is ground into tobacco powder, and then mixed with a smoking agent, sodium carboxymethyl cellulose, flavoring and water to prepare a second spraying liquid. The amount of each component added is 12.8 parts of tobacco powder, 6 parts of smoking agent, 0.6 parts of adhesive, 0.6 parts of flavor composition and 80 parts of water. The smoking agent is glycerol, 1,3-butanediol and xylitol in a mass ratio of 2:1:0.5. The flavor composition is tobacco flavoring, orange extract, tangerine peel extract, green tea extract and coffee extract in a mass ratio of 2:4:1.5:2:0.5.

[0124] (2) Pulping and forming the coniferous wood fiber into substrate, wherein the mixed pulp has a freeness of 50°SR and the substrate has a basis weight of 40 g / m³. 2 ;

[0125] (3) The second coating liquid is first sprayed onto one side of the substrate, with a coating amount of 80g / m². 2 After the coated surface dries, spray it onto the other side of the substrate at a rate of 40 g / m². 2 Then, the reconstituted tobacco leaves are obtained by drying at 90°C.

[0126] Comparative Example 3

[0127] This comparative example provides a reconstituted tobacco leaf. The difference between the preparation method of the reconstituted tobacco leaf and Example 1 is that polydimethylsiloxane is not added to the components of the first spraying liquid in step (1), and the reduction is made up by the concentrate. The remaining steps and process parameters are consistent with Example 1.

[0128] Comparative Example 4

[0129] This comparative example provides a reconstituted tobacco leaf. The only difference between the preparation method of the reconstituted tobacco leaf and Example 1 is that no smoking agent is added to the second spraying liquid. The reduction is made up by tobacco powder and water in proportion. The remaining steps and process parameters are the same as in Example 1.

[0130] Test Example 1

[0131] The reconstituted tobacco leaves for heated cigarettes prepared in Examples 1-13 and Comparative Examples 1-4 of this invention were used to prepare heated non-combustible cigarette samples using the same auxiliary materials, and the sensory quality of the cigarettes was evaluated using the same heating device.

[0132] Sensory quality evaluation indicators were set for the sensory test of heated cigarettes. Seven tasters were organized to evaluate and score the cigarettes according to the evaluation content and judgment criteria in Tables 1-2. The sensory quality indicators were scored on a 100-point scale.

[0133] The sensory quality evaluation indicators are: smoke volume (referring to smoke concentration and consistency before and after), aroma, strength, harmony, irritation and taste (aftertaste); the specific definitions of the six sensory quality evaluation indicators are shown in Table 1, and the evaluation criteria of the six sensory quality evaluation indicators are shown in Table 2.

[0134] Table 1

[0135]

[0136] Table 2

[0137]

[0138] The specific results are shown in Table 3 below:

[0139] Table 3

[0140]

[0141]

[0142] As can be seen from the data in Table 3, the reconstituted tobacco leaves obtained by the method provided by the present invention in Examples 1-3 not only produce more smoke and have a richer, fuller, and smoother aroma, but also effectively reduce throat irritation and improve oral aftertaste.

[0143] As can be seen from the comparison between Example 1 and Examples 4-6, when the type of smoke-generating agent is changed, the amount of smoke in the heated cigarette is significantly insufficient, and the aroma is reduced.

[0144] As can be seen from Examples 1 and 7-12, when a flavoring composition is added and the flavoring composition is a specific combination of the present invention, the aroma, taste and harmony of the heated cigarette are significantly better.

[0145] In Example 13, when the first spray liquid does not contain a smoke-generating agent, it also affects the sensory experience of heated cigarettes;

[0146] As can be seen from Comparative Example 1, when only the first spray liquid is used to coat the substrate to obtain reconstituted tobacco leaves, the heating effect of cigarettes is poor and the irritation is more obvious.

[0147] In Comparative Example 2, when only the second spray liquid was used to coat the substrate to obtain reconstituted tobacco leaves, the heating effect of the cigarette was poor and the aftertaste was more pronounced.

[0148] In Comparative Example 4, when the second spray liquid did not contain a smoke-generating agent, the amount of smoke from the heated cigarette was smaller, resulting in a lower level of satisfaction.

[0149] Test Example 2

[0150] The reconstituted tobacco leaves prepared in Examples 1-3 and Comparative Examples 1-3 of this invention were tested for hot water soluble content, storage stability and absorption resistance.

[0151] The hot water soluble matter was determined according to the Soxhlet extraction method of YC / T 571-2018, which specifies the determination of hot water soluble matter content in reconstituted tobacco leaves.

[0152] The method for testing storage stability is to place the test sample in a closed environment with a temperature of 25°C and a humidity of 50% for 60 days, and then observe whether powder shedding or sticking occurs.

[0153] Meanwhile, the reconstituted tobacco leaves prepared in Examples 1-11 and Comparative Examples 1-5 were prepared into heated cigarettes using the method of Test Example 1, and the draw resistance was tested according to GB / T 22838.5-2009 Determination of Physical Properties of Cigarettes and Filter Rods Part 5.

[0154] The results are shown in Table 4.

[0155] Table 4

[0156]

[0157]

[0158] As shown in Table 4, the hot water extract of reconstituted tobacco leaves obtained by the method provided by the present invention in Examples 1-3 is over 50%, and there is no powdering or sticking after 60 days of storage, and the suction resistance is also low.

[0159] As can be seen from Comparative Example 1, when the substrate is coated with only the first spray liquid to obtain reconstituted tobacco, although the content of hot water extract does not change much, the adhesion phenomenon is serious after storage and the absorption resistance is large.

[0160] In Comparative Example 2, when the substrate was coated with only the second spray liquid to obtain reconstituted tobacco, the content of hot water extract was relatively small, and the powdering was severe after storage.

[0161] In Comparative Example 3, when the first spraying liquid did not contain polydimethylsiloxane, the reconstituted tobacco leaves exhibited severe adhesion.

[0162] The applicant declares that this invention illustrates a method for preparing reconstituted tobacco leaves, its products, and applications through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the products of this invention, additions of auxiliary components, and selection of specific methods all fall within the protection and disclosure scope of this invention.

[0163] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0164] 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 describe the various possible combinations separately.

Claims

1. A method for preparing reconstituted tobacco leaves, characterized in that, The preparation method includes: (1) After extracting the first tobacco raw material in water, the solid and liquid phases are separated to obtain a liquid phase and a solid phase. The liquid phase is concentrated to obtain a concentrated liquid. The concentrated liquid is mixed with a liquid modifier to obtain a first spraying liquid. The solid material is mixed with added fibers and then subjected to pulping and papermaking processes to prepare a substrate. The second tobacco powder is made from the second tobacco raw material, and then mixed with a smoke generator and an adhesive in water to obtain the second spraying liquid; (2) Spray one side of the substrate with the first spray liquid and the other side with the second spray liquid, and then dry to obtain the reconstituted tobacco leaf; By weight, the first spraying liquid comprises 70-90 parts of concentrate, 0.01-0.2 parts of liquid modifier, and 0.1-20 parts of fume generator; By weight, the second spray liquid comprises 10-30 parts tobacco powder, 0.1-20 parts smoke-generating agent, 0.5-5 parts adhesive, and 60-99 parts water; The fumigating agent in either the first or second spraying liquid is a combination of glycerol, 1,3-butanediol and xylitol; The feed liquid modifier is polydimethylsiloxane; The mass ratio of glycerol, 1,3-butanediol and xylitol is (1-3):(0.5-1.5):(0.1-1). The substrate has a unit weight of 20-60 g / m³. 2 ; Step (2) The spraying amount of the first or second spraying liquid is independently 20-80 g / m³. 2 .

2. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The mass ratio of the first tobacco raw material to water is 1:(5-10).

3. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The extraction temperature is 40-80℃, and the time is 0.5-1.5h.

4. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The concentration is increased until the density of the concentrate is 1.0-1.5 g / mL.

5. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The first tobacco raw material includes any one or a combination of at least two of flue-cured tobacco, sun-cured tobacco, or burley tobacco.

6. The method for preparing reconstituted tobacco leaves as described in claim 1, wherein the second tobacco raw material comprises flue-cured tobacco.

7. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The adhesive includes sodium carboxymethyl cellulose.

8. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, By weight, 0.1-5 parts of a fragrance composition are also independently added to the first or second spray liquid.

9. The method for preparing reconstituted tobacco as described in claim 8, characterized in that, The fragrance composition in the first or second spray liquid independently includes a combination of at least two of the following: tobacco flavoring, orange extract, dried tangerine peel extract, green tea extract, or coffee extract.

10. The method for preparing reconstituted tobacco as described in claim 9, characterized in that, The fragrance composition in the first or second spray liquid is a combination of tobacco flavoring, orange extract, dried tangerine peel extract, green tea extract and coffee extract.

11. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The added fiber includes any one or a combination of at least two of the following: coniferous wood fiber, broadleaf wood fiber, or flax fiber.

12. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The mass ratio of the solid to the added fiber is 1:(0.25-4).

13. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The freeness of the mixed pulp after beating is 30-80°SR.

14. The method for preparing reconstituted tobacco as described in claim 1, characterized in that, The drying temperature in step (2) is 60-120℃.

15. A reconstituted tobacco leaf, characterized in that, The reconstituted tobacco leaf is prepared using the method for preparing reconstituted tobacco leaf as described in any one of claims 1-14.

16. The application of reconstituted tobacco as described in claim 15 in cigarette production.

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