Tobacco sheet having a multi-flavour note

Abstract

The present application belongs to the technical field of reconstituted tobacco, and relates to a tobacco sheet with multiple flavors, which comprises a tobacco sheet substrate, a conventional glue layer on at least one surface of the tobacco sheet substrate, a multiple flavor essence layer arranged between the tobacco sheet substrate and the conventional glue layer, and multiple flavor essence doped in the conventional glue layer. The multiple flavor essence of the present application is extracted from formula tobacco leaves. The tobacco sheet prepared by using the technical solution can produce multiple flavor smoke at the same time when heated, has good aroma quality, sufficient aroma, and is coordinated with multiple tobacco formula, thereby enriching the flavors of the cigarette.

Description

Technical Field

[0001] The invention belongs to the technical field of reconstituted tobacco leaves, and in particular relates to a tobacco sheet with multiple aromas. Background Art

[0002] In the current cigarette industry, reconstituted tobacco has been widely used in both conventional tobacco and heat-not-burn cigarettes. The thick pulp method and papermaking method are the main methods for producing reconstituted tobacco. Both production processes result in serious loss of flavor substances in the produced reconstituted tobacco.

[0003] To ensure sufficient aroma from reconstituted tobacco leaves during cigarette production, flavorings are often added to enhance the aroma of cut tobacco. However, this method of adding flavors results in sufficient aroma in the smoke during the initial draw. However, in the later stages of the draw, the flavor evaporates at the initial smoke temperature, significantly reducing the aroma content and resulting in a poorer puff experience. Furthermore, current flavoring methods typically use a single-note flavor, resulting in a single overall aroma that fails to meet consumers' demand for a richer aroma profile. Summary of the Invention

[0004] The object of the present invention is to provide a tobacco sheet with multiple aromas to solve the above-mentioned problems existing in existing reconstituted tobacco leaves.

[0005] To achieve the above objectives, this application is implemented through the following technical solutions:

[0006] A tobacco sheet with multiple aromas comprises a tobacco sheet substrate, a conventional adhesive layer on at least one surface of the tobacco sheet substrate, a multi-aroma essence layer arranged between the tobacco sheet substrate and the conventional adhesive layer, and the conventional adhesive layer is doped with the multi-aroma essence.

[0007] Preferably, conventional coating glue is added to the multi-fragrance flavor layer, and the content of the conventional coating glue is lower than the amount of conventional coating glue in the conventional glue layer.

[0008] Preferably, the multi-fragrance essence is an essence having woody fragrance, burnt sweet fragrance and liquorice fragrance.

[0009] Preferably, the multi-flavor essence is extracted from formulated tobacco leaves.

[0010] Preferably, the blended tobacco leaves are composed of 55-75% flue-cured tobacco leaves, 10-20% sun-cured tobacco leaves, 10-15% oriental tobacco leaves and the remainder burley tobacco leaves by weight.

[0011] Preferably, the preparation method of the multi-fragrance flavor comprises the following steps:

[0012] S1. Selecting formulated tobacco leaves and crushing them into tobacco powder;

[0013] S2. Add 95% ethanol as an extractant to the tobacco powder obtained in step S1, stir thoroughly, and extract the tobacco powder at 20-40°C for 2-8 hours to obtain an extract.

[0014] S3, taking the extract from step S2, passing it through an ultrafiltration membrane to remove the extractant, and obtaining a first tobacco extract;

[0015] S4, taking the first tobacco extract from step S3, adding 10-15 times the volume of water, mixing evenly, letting the liquid stand overnight, and then centrifuging to obtain a first aqueous solution component and a first precipitate;

[0016] S5. Add an appropriate amount of 95% ethanol to the first precipitate obtained in step S4, stir evenly, and place in a -15-20°C environment for freeze dewaxing. After centrifugation, remove the ethanol to obtain a first alcohol-soluble extract;

[0017] S6, taking the first aqueous solution component of step S4 and passing it through a 0.22-0.3 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0018] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a set ratio to obtain the target flavor.

[0019] Preferably, the blended tobacco leaves are dried at 40° C. for 4 hours and then pulverized. After pulverization, the pulverized leaves are passed through a 0.425 mm pore size sieve.

[0020] Preferably, the centrifugal separation in step S4 and step S5 is performed at a speed of 6000 r / min and a time of 3 minutes.

[0021] Preferably, in step S5, the volume ratio of the first precipitate to ethanol is 1:5-1:10.

[0022] Preferably, in step S7, the volume ratio of the first alcohol-soluble extract to the second aqueous solution component is 5:1-3:1.

[0023] The beneficial effects of the present invention are:

[0024] The tobacco sheets prepared using this technical solution can simultaneously produce multiple aromas such as woody, sweet, and licorice when burned. The aroma is of good quality and sufficient, and is coordinated with a variety of tobacco formulas to enrich the aroma of cigarettes. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention are described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be interpreted as limiting the technical solutions of the present invention.

[0026] In the technical solution of the present application, the tobacco sheet substrate involved is a conventionally manufactured tobacco sheet substrate, which can be produced by a thick pulp method or a papermaking method as needed. This technology is all existing technology. Therefore, the applicant does not explain it in this technical solution. All tobacco sheet substrates produced by all current preparation methods are applicable to the technical solution of the present application.

[0027] In this technical solution, the conventional coating glue used for the conventional coating layer on at least one surface of the tobacco sheet substrate is also prior art. The applicant will not explain them one by one here. Those skilled in the art can obtain the required conventional coating glue based on the prior art.

[0028] The key point of this technical solution is to add a multi-flavor essence layer between the conventionally prepared tobacco sheet substrate and the adhesive layer, and to add a portion of conventional coating adhesive and multi-flavor essence to the multi-flavor essence layer and the conventional adhesive layer, respectively. The purpose of adding conventional coating adhesive to the multi-flavor essence layer is to improve the bonding with the tobacco sheet substrate, while at the same time preventing the volatilization of the multi-flavor essence during storage from affecting product quality. The amount of conventional coating adhesive added is not limited in this application, but the mass percentage cannot exceed 50% of the amount of multi-flavor essence used. The amount of multi-flavor essence used in the conventional adhesive layer does not exceed 20% of the total amount of multi-flavor essence used in the tobacco sheet.

[0029] The multi-flavor essence of the present application is an essence having woody, sweet and licorice aromas, and is extracted from formulated tobacco leaves, which are composed by weight of 55-75% flue-cured tobacco leaves, 10-20% sun-cured tobacco leaves, 10-15% oriental tobacco leaves and the remainder burley tobacco leaves.

[0030] The formulated tobacco leaves used in the technical solution of the present application, whether they are flue-cured tobacco leaves, spice tobacco leaves, sun-cured tobacco leaves, or burley tobacco leaves, are not limited to the origin or grade of tobacco leaves. However, it should be noted that tobacco leaves from different origins may differ in the content of certain components. Therefore, in actual use, it is necessary to match and select flavors with woody, sweet and licorice aromas according to the formula combination of tobacco leaves from different origins or from multiple origins and prepared by the present technical solution, so as to select the tobacco raw materials with the above-mentioned flavors that best match the formula of the produced cigarette tobacco.

[0031] That is to say, according to this technical solution, the above-mentioned tobacco leaf formula can be used to produce essences with woody aroma, burnt sweet aroma and licorice aroma, but there are differences in details, which should be common sense for those skilled in the art.

[0032] In the following examples of the present application, the blended tobacco leaves are all from the same origin. In other examples, those skilled in the art can select tobacco leaves from different origins as needed.

[0033] Example 1

[0034] A method for preparing a flavor having woody, sweet, and liquorice aromas, comprising the following steps:

[0035] S1. Select blended tobacco leaves and crush them into tobacco powder; the blended tobacco leaves of the present application are composed, by weight, of 55% flue-cured tobacco leaves, 10% sun-cured tobacco leaves, 10% oriental tobacco leaves, and the remainder burley tobacco leaves, all of which are produced in Henan. Select 100g of the blended tobacco leaves and place them in an oven set to 40°C. Low-temperature dry the blended tobacco leaves for 4 hours, crush the dried leaves, and pass them through a 0.425mm mesh sieve.

[0036] S2. Add 20 g of the tobacco powder obtained in step S1 to 200 ml of 95% by volume ethanol as an extractant, stir thoroughly, and extract the tobacco powder at 25° C. for 2-8 hours to obtain an extract.

[0037] S3, taking an appropriate amount or all of the extract from step S2, which does not affect the implementation of the present technical solution, and removing the extractant after passing it through a 0.8 μm ultrafiltration membrane to obtain a first tobacco extract;

[0038] S4. Take the first tobacco extract from step S3, add 10 times the volume of water, mix well, let the liquid stand overnight, and then centrifuge (speed 6000 rpm, time for 3 minutes) to obtain a first aqueous solution component and a first precipitate;

[0039] S5. Add an appropriate amount of 95% by volume ethanol (solid-to-liquid ratio of 1:5) to the first precipitate obtained in step S4, stir evenly, and place in a -20°C environment for freeze dewaxing. Centrifuge (speed 6000 r / min, time 3 min) and remove ethanol to obtain a first alcohol-soluble extract;

[0040] S6, taking the first aqueous solution component of step S4 and passing it through a 0.25 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0041] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a volume ratio of 5:1 to obtain the target flavor P1.

[0042] Example 2

[0043] A method for preparing a flavor having woody, sweet, and liquorice aromas, comprising the following steps:

[0044] S1. Select blended tobacco leaves and crush them into tobacco powder. The blended tobacco leaves of this application are composed, by weight, of 75% flue-cured tobacco leaves, 10% sun-cured tobacco leaves, 10% oriental tobacco leaves, and 5% burley tobacco leaves, all of which are produced in Henan. Select 100g of the blended tobacco leaves and place them in an oven set to 40°C. Low-temperature dry the blended tobacco leaves for 4 hours, crush the dried leaves, and pass them through a 0.425mm mesh sieve.

[0045] S2. Add 20 g of the tobacco powder obtained in step S1 to 200 ml of 95% by volume ethanol as an extractant, stir thoroughly, and extract the tobacco powder at 25° C. for 2-8 hours to obtain an extract.

[0046] S3, taking an appropriate amount or all of the extract from step S2, which does not affect the implementation of the present technical solution, and removing the extractant after passing it through a 0.8 μm ultrafiltration membrane to obtain a first tobacco extract;

[0047] S4. Take the first tobacco extract from step S3, add 15 times the volume of water, mix well, let the liquid stand overnight, and then centrifuge (speed 6000 rpm, time for 3 minutes) to obtain a first aqueous solution component and a first precipitate;

[0048] S5. Add an appropriate amount of 95% by volume ethanol (solid-to-liquid ratio of 1:10) to the first precipitate obtained in step S4, stir evenly, and then freeze-dewax at -20°C. Centrifuge (speed 6000 r / min, time 3 min) to remove the ethanol to obtain a first alcohol-soluble extract;

[0049] S6, taking the first aqueous solution component of step S4 and passing it through a 0.25 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0050] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a volume ratio of 3:1 to obtain the target flavor P2.

[0051] Example 3

[0052] A method for preparing a flavor having woody, sweet, and liquorice aromas, comprising the following steps:

[0053] S1. Select blended tobacco leaves and crush them into tobacco powder. The blended tobacco leaves of this application are composed, by weight, of 60% flue-cured tobacco leaves, 15% sun-cured tobacco leaves, 15% oriental tobacco leaves, and 10% burley tobacco leaves, all of which are produced in Henan. Select 100g of the blended tobacco leaves and place them in an oven set to 40°C. Low-temperature dry the blended tobacco leaves for 4 hours, crush the dried leaves, and pass them through a 0.425mm mesh sieve.

[0054] S2. Add 20 g of the tobacco powder obtained in step S1 to 200 ml of 95% by volume ethanol as an extractant, stir thoroughly, and extract the tobacco powder at 20-40° C. for 2-8 hours to obtain an extract.

[0055] S3, taking an appropriate amount or all of the extract from step S2, which does not affect the implementation of the present technical solution, and removing the extractant after passing it through a 0.8 μm ultrafiltration membrane to obtain a first tobacco extract;

[0056] S4. Take the first tobacco extract from step S3, add 15 times the volume of water, mix well, let the liquid stand overnight, and then centrifuge (speed 6000 rpm, time for 3 minutes) to obtain a first aqueous solution component and a first precipitate;

[0057] S5. Add an appropriate amount of 95% by volume ethanol (solid-to-liquid ratio of 1:8) to the first precipitate obtained in step S4, stir evenly, and then freeze-dewax at -20°C. Centrifuge (speed 6000 r / min, time 3 min) to remove the ethanol to obtain a first alcohol-soluble extract;

[0058] S6, taking the first aqueous solution component of step S4 and passing it through a 0.25 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0059] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a volume ratio of 4:1 to obtain the target flavor P3.

[0060] Example 4

[0061] A method for preparing a flavor having woody, sweet, and liquorice aromas, comprising the following steps:

[0062] S1. Select blended tobacco leaves and crush them into tobacco powder. The blended tobacco leaves of this application are composed, by weight, of 65% flue-cured tobacco leaves, 18% sun-cured tobacco leaves, 12% oriental tobacco leaves, and 5% burley tobacco leaves, all of which are produced in Henan. Select 100g of the blended tobacco leaves and place them in an oven set to 40°C. Low-temperature dry the blended tobacco leaves for 4 hours, crush the dried leaves, and pass them through a 0.425mm mesh sieve.

[0063] S2. Add 20 g of the tobacco powder obtained in step S1 to 200 ml of 95% by volume ethanol as an extractant, stir thoroughly, and extract the tobacco powder at 20-40° C. for 2-8 hours to obtain an extract.

[0064] S3, taking an appropriate amount or all of the extract from step S2, which does not affect the implementation of the present technical solution, and removing the extractant after passing it through a 0.8 μm ultrafiltration membrane to obtain a first tobacco extract;

[0065] S4. Take the first tobacco extract from step S3, add 15 times the volume of water, mix well, let the liquid stand overnight, and then centrifuge (speed 6000 rpm, time for 3 minutes) to obtain a first aqueous solution component and a first precipitate;

[0066] S5. Add an appropriate amount of 95% by volume ethanol (solid-to-liquid ratio of 1:5) to the first precipitate obtained in step S4, stir evenly, and place in a -20°C environment for freeze dewaxing. Centrifuge (speed 6000 r / min, time 3 min) and remove ethanol to obtain a first alcohol-soluble extract;

[0067] S6, taking the first aqueous solution component of step S4 and passing it through a 0.25 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0068] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a volume ratio of 4.5:1 to obtain the target flavor P4.

[0069] Example 5

[0070] A method for preparing a flavor having woody, sweet, and liquorice aromas, comprising the following steps:

[0071] S1. Select blended tobacco leaves and crush them into tobacco powder. The blended tobacco leaves of this application are composed, by weight, of 70% flue-cured tobacco leaves, 12% sun-cured tobacco leaves, 11% oriental tobacco leaves, and the remainder burley tobacco leaves, all of which are produced in Henan. Select 100g of the blended tobacco leaves and place them in an oven set to 40°C. Low-temperature dry the blended tobacco leaves for 4 hours, crush the dried leaves, and pass them through a 0.425mm mesh sieve.

[0072] S2. Add 20 g of the tobacco powder obtained in step S1 to 200 ml of 95% by volume ethanol as an extractant, stir thoroughly, and extract the tobacco powder at 20-40° C. for 2-8 hours to obtain an extract.

[0073] S3, taking an appropriate amount or all of the extract from step S2, which does not affect the implementation of the present technical solution, and removing the extractant after passing it through a 0.8 μm ultrafiltration membrane to obtain a first tobacco extract;

[0074] S4. Take the first tobacco extract from step S3, add 10-15 times the volume of water, mix well, let the liquid stand overnight, and then centrifuge (speed 6000 r / min, time for 3 minutes) to obtain a first aqueous solution component and a first precipitate;

[0075] S5. Take the first precipitate of step S4, add an appropriate amount of 95% by volume ethanol (solid-liquid ratio of 1:5), stir evenly, place in a -15°C environment for freeze dewaxing, centrifuge (speed 6000 r / min, time for 3 min), and then remove ethanol to obtain a first alcohol-soluble extract;

[0076] S6, taking the first aqueous solution component of step S4 and passing it through a 0.3 μm ultrafiltration membrane to obtain a second aqueous solution component;

[0077] S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a volume ratio of 3.5:1 to obtain the target flavor P5.

[0078] The multi-flavor essences P1 to P5 prepared above are used in the preparation of tobacco sheets as needed to achieve the preparation of the tobacco sheets with multi-flavor of the present application.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tobacco sheet with multiple aromas, comprising a tobacco sheet substrate and a conventional adhesive layer on at least one surface of the tobacco sheet substrate, characterized in that: A multi-flavor essence layer is provided between the tobacco sheet substrate and the conventional adhesive layer, and the conventional adhesive layer is doped with the multi-flavor essence; The preparation method of the multi-fragrance essence comprises the following steps: S1. Selecting formulated tobacco leaves and crushing them into tobacco powder; S2. Add 95% ethanol as an extractant to the tobacco powder obtained in step S1, stir thoroughly, and extract the tobacco powder at 20-40°C for 2-8 hours to obtain an extract. S3, taking the extract from step S2, passing it through an ultrafiltration membrane to remove the extractant, and obtaining a first tobacco extract; S4, taking the first tobacco extract from step S3, adding 10-15 times the volume of water, mixing evenly, letting the liquid stand overnight, and then centrifuging to obtain a first aqueous solution component and a first precipitate; S5. Add an appropriate amount of 95% ethanol to the first precipitate obtained in step S4, stir evenly, and place in a -15-20°C environment for freeze dewaxing. After centrifugation, remove the ethanol to obtain a first alcohol-soluble extract; S6, taking the first aqueous solution component of step S4 and passing it through a 0.22-0.3 μm ultrafiltration membrane to obtain a second aqueous solution component; S7. Take the first alcohol-soluble extract in step S5 and the second aqueous solution component in step S6 and mix them in a set ratio to obtain the target flavor.

2. The tobacco sheet with multiple aromas according to claim 1, characterized in that: Conventional coating glue is added to the multi-fragrance flavor layer, and the content of the conventional coating glue is lower than the amount of conventional coating glue in the conventional glue layer.

3. The tobacco sheet with multiple aromas according to claim 1, characterized in that: The multi-fragrance essence is a fragrance having woody fragrance, burnt sweet fragrance and liquorice fragrance at the same time.

4. The tobacco sheet with multiple aromas according to claim 1, characterized in that: The multi-flavor essence is extracted from formulated tobacco leaves.

5. The tobacco sheet with multiple aromas according to claim 4, characterized in that: The blended tobacco leaves consist of 55-75% of flue-cured tobacco leaves, 10-20% of sun-cured tobacco leaves, 10-15% of oriental tobacco leaves and the remainder of burley tobacco leaves in terms of weight percentage.

6. The tobacco sheet with multiple aromas according to claim 1, characterized in that: The formulated tobacco leaves were dried at 40°C for 4 hours and then crushed. After crushing, the crushed leaves were passed through a 0.425mm pore size sieve.

7. The tobacco sheet with multiple aromas according to claim 1, characterized in that: The centrifugal separation in step S4 and step S5 is performed at a rotation speed of 6000 r / min and a time of 3 min.

8. The tobacco sheet with multiple aromas according to claim 1, characterized in that: In step S5, the volume ratio of the first precipitate to the ethanol is 1:5-1:

10.

9. The tobacco sheet with multiple aromas according to claim 1, characterized in that: In step S7, the volume ratio of the first alcohol-soluble extract to the second aqueous solution component is 5:1-3:1.