Preparation method and application of smoked tobacco shreds

Abstract

The invention provides a preparation method and application of smoked tobacco shreds, the preparation method comprises the steps that tobacco leaves are shredded and then mixed with fragrant materials, then temperature and humidity are increased, sealing treatment is performed after drying, the fragrant materials are removed after standing, the smoked tobacco shreds are obtained, and the fragrant materials comprise the combination of tea powder and stevia rebaudian leaf powder. According to the method, in the tobacco shred drying process, the tobacco shreds and the fragrant materials are mixed and parched, so that exogenous fragrance is adsorbed and transferred into the tobacco shreds, then the fragrant materials are screened out, and the tobacco shreds are endowed with more uniform and more distinctive characteristic fragrance.

Description

Technical Field

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

[0002] As consumers pay more and more attention to health, "reducing tar and reducing harm" has become an inevitable trend in the development of the tobacco industry, and the market for low-tar cigarette products has gradually expanded. But at the same time, the aroma and taste of cigarettes have declined, and increasing the aroma has become increasingly important, especially for my country's tobacco industry, where cigarettes account for more than 95%.

[0003] At present, the tobacco cigarette processing technology uses traditional blended fragrance liquid for fragrance in the flavoring process. The fragrance is carried out after the tobacco leaves are dried. The temperature of the tobacco is controlled during the fragrance addition, and the fragrance liquid is slowly absorbed and penetrated into the tobacco by adhering to the surface of the tobacco.

[0004] CN101461564A provides a flue-cured tobacco leaf tar reduction and flavoring agent, and a preparation method and a use method thereof. The flue-cured tobacco leaf tar reduction and flavoring agent comprises 1 to 2 parts by weight of a flue-cured tobacco leaf tar reduction agent, 1 to 3 parts by weight of a flue-cured tobacco leaf flavoring agent, and 5 to 10 parts by weight of a humectant. The flue-cured tobacco leaf tar reduction and flavoring agent of the present invention can reduce the tar content in cigarette smoke and can reduce the harmful gas CO in the smoke. Adding the agent to tobacco leaves can make the fragrance style more prominent. The preparation method of the flue-cured tobacco leaf tar reduction and flavoring agent of the present invention has a simple process, low production cost, and is easy to produce.

[0005] CN102936535A discloses a method for preparing a natural tobacco flavoring agent, which uses Albizzia julibrissin as a raw material, extracts the natural tobacco flavoring agent through solvent extraction, and concentrates the extract to obtain the natural tobacco flavoring agent. Adding the natural tobacco flavoring agent to cigarette shreds can reduce the irritation of smoke, mask impurities, improve the aroma quality and aroma amount of smoke, and give the cigarette smoke an elegant fragrance style. The outstanding feature of the present invention is that a new natural tobacco flavoring agent is prepared, and a new use of Albizzia julibrissin is developed.

[0006] However, the flavoring agents in the above methods need to be concentrated and extracted, which is a relatively complicated process. Direct spraying will result in uneven distribution of flavor. As the storage time of cigarettes increases, the aroma of cigarettes is greatly weakened, resulting in consumers' physiological feelings when smoking cigarettes being unsatisfied. Therefore, it is urgent to develop a method that can both improve the comfort of tobacco and maintain the aroma for a long time, so as to better improve the sensory quality of cigarettes. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for preparing enhanced tobacco shreds and applications thereof. The method is used to prepare.

[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a method for preparing enhanced tobacco shreds, the preparation method comprising:

[0010] The tobacco leaves are cut into shreds and mixed with the flavor materials, and then heated, humidified, dried, and sealed, and the flavor materials are removed after standing to obtain the enhanced tobacco shreds;

[0011] The flavor material includes a combination of tea powder and stevia leaf powder.

[0012] The method of the present invention mixes and roasts tobacco shreds with flavor materials during the drying process of the shredded tobacco, so that the exogenous flavor is adsorbed and transferred to the shredded tobacco, and then the flavor materials are screened out, so that the shredded tobacco has a more uniform and distinctive characteristic aroma. In addition, the present invention selects tea powder and stevia leaves as flavor materials, which, after being mixed with tobacco leaves, can make the final tobacco leaves have soft smoke, lower irritation, improve the quality of smoke aroma, and further give the cigarette smoke an elegant and light fragrance.

[0013] Preferably, the mass ratio of the tea powder to the stevia leaf 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.

[0014] Preferably, the tobacco leaf is selected from any one of Hunan tobacco leaf, Shandong tobacco leaf or Guizhou tobacco leaf, or a combination of at least two of them.

[0015] Preferably, the mass ratio of the flavor material to the tobacco leaf is 1:(10-20), for example, it can be 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18 or 1:19, etc.

[0016] Preferably, the mass ratio of the flavor material to the tobacco leaf is 1:(13-18).

[0017] Preferably, the tobacco leaves are loosened and moistened after being shredded, and then mixed with the flavor material.

[0018] Preferably, the moisture content of the loose and moistened tobacco leaves is 15-20%, for example, 15%, 16%, 17%, 18%, 19% or 20%.

[0019] Preferably, the flavor material is soaked with water before being mixed with the tobacco leaves.

[0020] In the present invention, the flavor material is soaked with water before being mixed with tobacco, which can better improve the ability of the flavor to penetrate into the tobacco, improve the uniformity of the flavor distribution in the tobacco, reduce the loss of tobacco flavor, and improve the utilization rate of the flavor material.

[0021] Preferably, the temperature of the water is 80-90°C, for example, it may be 81°C, 82°C, 83°C, 84°C, 85°C, 86°C, 87°C, 88°C or 89°C, etc.

[0022] Preferably, the heating and humidification is carried out in a HT rehumidification system.

[0023] Preferably, the steam pressure of the HT rehumidification system is 0.8-1.5 bar, for example, it can be 0.9 bar, 1 bar, 1.1 bar, 1.2 bar, 1.3 bar or 1.4 bar.

[0024] Preferably, the temperature of the tobacco leaves after heating and humidification is 60-70°C, for example, it can be 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C or 69°C.

[0025] Preferably, the moisture content of the tobacco leaves after heating and humidification is 20-25%, for example, it can be 20%, 21%, 22%, 23%, 24% or 25%.

[0026] Preferably, the drying is carried out in a drum dryer.

[0027] The method of the present invention can maintain the aroma of the processed tobacco leaves for a longer time by mixing and drying the tobacco leaves and the aroma materials, thereby better improving the quality of the smoke, and improving the smoke inducibility and oral aftertaste.

[0028] Preferably, the drum wall temperature of the drum dryer is 110-120°C, for example, it can be 111°C, 112°C, 113°C, 114°C, 115°C, 116°C, 117°C, 118°C or 119°C.

[0029] Preferably, the moisture content of the dried tobacco leaves is 5-15%, for example, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13% or 14%.

[0030] Preferably, the standing time is 1.5-3 h, for example, 1.7 h, 1.9 h, 2 h, 2.2 h, 2.5 h, 2.7 h or 2.9 h.

[0031] In a second aspect, the present invention provides an enhanced tobacco shred, wherein the enhanced tobacco shred is prepared by the method described in the first aspect.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. In the method of the present invention, the tobacco shreds are mixed and roasted with plant spices during the leaf drying process, so that the exogenous aroma is adsorbed and transferred to the tobacco shreds, and then the aromatic materials are screened out to give the tobacco shreds a more uniform and distinctive characteristic aroma.

[0034] 2. In the present invention, tea powder and stevia leaves are selected as flavor materials, so that the obtained tobacco leaves have soft smoke, lower irritation, and improve the aroma quality of the smoke, thereby giving the cigarette smoke an elegant and light fragrance.

[0035] 3. The method of the present invention has simple steps and does not require the addition of other special equipment. Conventional tobacco production equipment and production lines can be used, and it is easy to promote and apply. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0037] The tobacco leaves used in the embodiments of the present invention are Hunan tobacco leaves, and the other raw materials can be used as long as they are purchased from regular dealers.

[0038] Example 1

[0039] This embodiment provides a method for preparing enhanced tobacco shreds, the method comprising:

[0040] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0041] (2) packaging tea powder and stevia leaf powder in a mass ratio of 1:1 in separate bags and soaking them in water at 85° C. for 20 seconds to obtain a processed flavor material;

[0042] (3) mixing 15 parts of the tobacco leaves processed in step (1) with 1 part of the flavor material processed in step (2);

[0043] (4) subjecting the tobacco leaves mixed in step (3) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0044] (5) Drying the tobacco leaves treated in step (4) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed and left to stand for 2.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0045] Example 2

[0046] This embodiment provides a method for preparing enhanced tobacco shreds, the method comprising:

[0047] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 20%;

[0048] (2) packaging tea powder and stevia leaf powder in a mass ratio of 1:0.5 in separate bags and soaking them in water at 80° C. for 30 seconds to obtain a processed flavor material;

[0049] (3) mixing 18 parts of the tobacco leaves processed in step (1) with 1 part of the flavor material processed in step (2);

[0050] (4) subjecting the tobacco leaves mixed in step (3) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 0.8 bar, the temperature is 70° C., and the moisture content of the treated tobacco leaves is 20%;

[0051] (5) Drying the tobacco leaves treated in step (4) in a drum dryer, wherein the drum wall temperature of the drum dryer is 110° C., and the moisture content of the treated tobacco leaves is 15%. The dried tobacco leaves are then packed in boxes and allowed to stand for 3 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0052] Example 3

[0053] This embodiment provides a method for preparing enhanced tobacco shreds, the method comprising:

[0054] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 15%;

[0055] (2) packaging tea powder and stevia leaf powder in a mass ratio of 1:1.5 in separate bags and soaking them in 90° C. water for 15 seconds to obtain a processed flavor material;

[0056] (3) mixing 13 parts of the tobacco leaves processed in step (1) with 1 part of the flavor material processed in step (2);

[0057] (4) subjecting the tobacco leaves mixed in step (3) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1.5 bar, the temperature is 60° C., and the moisture content of the treated tobacco leaves is 25%;

[0058] (5) Drying the tobacco leaves treated in step (4) in a drum dryer, wherein the drum wall temperature of the drum dryer is 120° C., and the moisture content of the treated tobacco leaves is 5%. The dried tobacco leaves are then packed in boxes and allowed to stand for 1.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0059] Example 4

[0060] This embodiment provides a method for preparing enhanced tobacco shreds, the method comprising:

[0061] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0062] (2) mixing 15 portions of tobacco leaves treated in step (1) with 1 portion of a flavor material, wherein the flavor material is a combination of tea powder and stevia leaf powder;

[0063] (3) subjecting the tobacco leaves mixed in step (2) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0064] (4) Drying the tobacco leaves treated in step (3) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed in boxes and allowed to stand for 2.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0065] Example 5

[0066] This embodiment provides a method for preparing enhanced tobacco shreds, the method comprising:

[0067] (1) packaging tea powder and stevia leaf powder in separate bags and soaking them in water at 85° C. for 20 seconds to obtain a processed flavor material;

[0068] (2) shredding the tobacco leaves, and then mixing 15 parts of the shredded tobacco leaves with 1 part of the flavor material processed in step (1);

[0069] (3) subjecting the tobacco leaves mixed in step (2) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0070] (4) Drying the tobacco leaves treated in step (3) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed in boxes and allowed to stand for 2.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0071] Example 6

[0072] This comparative example provides a method for preparing enhanced tobacco shreds. The difference between the preparation method and Example 1 is that in step (2), the mass ratio of tea powder to stevia leaf powder is 1:0.1, and the remaining steps are consistent with Example 1.

[0073] Example 7

[0074] This comparative example provides a method for preparing enhanced tobacco shreds. The difference between the preparation method and Example 1 is that in step (2), the mass ratio of tea powder to stevia leaf powder is 1:3, and the remaining steps are consistent with Example 1.

[0075] Example 8

[0076] This embodiment provides a method for preparing enhanced tobacco shreds. The method is different from that of Embodiment 1 only in that the mass ratio of the flavor material to the tobacco leaves in step (3) is 1:5, and the remaining steps are consistent with those of Embodiment 1.

[0077] Example 9

[0078] This embodiment provides a method for preparing enhanced tobacco shreds. The method is different from that of Embodiment 1 only in that the mass ratio of the flavor material to the tobacco leaves in step (3) is 1:30, and the remaining steps are consistent with those of Embodiment 1.

[0079] Example 10

[0080] This embodiment provides a method for preparing enhanced tobacco shreds. The method is different from that of Embodiment 1 only in that the moisture content of the tobacco leaves after heating and humidification in step (4) is 35%, and the remaining steps are consistent with those of Embodiment 1.

[0081] Comparative Example 1

[0082] This comparative example provides a method for preparing enhanced tobacco shreds, the method comprising:

[0083] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0084] (2) packaging the tea powder and stevia leaf powder in separate bags and soaking them in water at 85° C. for 20 seconds to obtain a processed flavor material;

[0085] (3) mixing 15 parts of the tobacco leaves processed in step (1) with 1 part of the flavor material processed in step (2);

[0086] (4) Drying the tobacco leaves treated in step (3) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed in boxes and allowed to stand for 2.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0087] Comparative Example 2

[0088] This comparative example provides a method for preparing enhanced tobacco shreds, the method comprising:

[0089] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0090] (2) subjecting the tobacco leaves mixed in step (1) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0091] (3) packaging the tea powder and stevia leaf powder in separate bags and soaking them in water at 85° C. for 20 seconds to obtain a processed flavor material;

[0092] (4) mixing 15 parts of the tobacco leaves processed in step (2) with 1 part of the flavor material processed in step (3);

[0093] (5) Drying the tobacco leaves treated in step (4) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed and left to stand for 2.5 hours, and then the aroma materials are removed to obtain the tobacco leaves.

[0094] Comparative Example 3

[0095] This comparative example provides a method for preparing enhanced tobacco shreds, the method comprising:

[0096] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0097] (2) subjecting the tobacco leaves mixed in step (1) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0098] (3) drying the tobacco leaves treated in step (2) in a drum dryer, wherein the drum dryer wall temperature is 115° C. and the moisture content of the treated tobacco leaves is 10%.

[0099] (4) packaging the tea powder and stevia leaf powder in separate bags and soaking them in water at 85° C. for 20 seconds to obtain a processed flavor material;

[0100] (5) 15 parts of the tobacco leaves treated in step (3) and 1 part of the aroma material treated in step (4) are mixed and stirred for 5 hours; the tobacco leaves are then packed into boxes and allowed to stand for 2.5 hours, and then the aroma material is removed to obtain the tobacco leaves.

[0101] Comparative Example 4

[0102] This comparative example provides a method for preparing tobacco shreds, the difference between the preparation method and Example 1 is that in step (2), the flavor material is only tea powder, the amount of flavor material added remains unchanged, and the remaining steps are consistent with Example 1.

[0103] Comparative Example 5

[0104] This comparative example provides a method for preparing enhanced tobacco shreds. The difference between the preparation method and Example 1 is that in step (2), the flavor material is only stevia leaf powder, the amount of flavor material added remains unchanged, and the remaining steps are consistent with Example 1.

[0105] Comparative Example 6

[0106] This comparative example provides a method for preparing enhanced tobacco shreds, the method comprising:

[0107] (1) Cutting tobacco leaves into shreds and performing loosening and moisture conditioning treatment, wherein the moisture content of the tobacco leaves after the treatment is 18%;

[0108] (2) subjecting the tobacco leaves mixed in step (1) to a heating and humidifying treatment in a HT rehumidification system, wherein the steam pressure of the HT rehumidification system is 1 bar, the temperature is 65° C., and the moisture content of the treated tobacco leaves is 22%;

[0109] (3) drying the tobacco leaves treated in step (2) in a drum dryer, wherein the drum wall temperature of the drum dryer is 115° C., and the moisture content of the treated tobacco leaves is 10%. The dried tobacco leaves are then packed into boxes and left to stand for 2.5 hours to obtain the tobacco leaves.

[0110] Test Example 1

[0111] The original tobacco leaves, tobacco leaves obtained in Examples 1-10 and Comparative Examples 1-6 were taken to measure the aroma components according to the following method. The method is as follows:

[0112] Weigh 2 g of sample, accurate to 0.1 mg, measure each sample twice in parallel, add 300 μL D3-phenylethyl acetate internal standard solution (2 mg / mL) and 15 mL ethanol, ultrasonically extract for 10 minutes, let stand for 24 hours, ultrasonically extract for another 10 minutes, let stand for 10 minutes, pass through a 0.45 μm organic filter membrane, and perform GC-MS determination.

[0113] GC-MS conditions: DB-WAXetr (60mx 250μm x 0.25μm) chromatographic column, initial temperature 40℃, retention 2min; increase to 160℃ at 5℃ / min, retention 8min; then increase to 260℃ at 5℃ / min, retention 46min. Injection port temperature 260℃; injection volume 1.5μL; carrier gas is helium, constant flow mode, 1.5mL / min; non-split injection; solvent delay 20min; transfer line temperature 260℃; ionization mode EI; ion source temperature 250℃; ionization energy 70eV; quadrupole temperature 150℃; scanning mode Scan.

[0114] The results are shown in Table 1.

[0115] Table 1 Detection results of flavor components of different samples (μg / g)

[0116]

[0117] As can be seen from Table 1, the method of the present application can effectively increase the flavor components in tobacco leaves, and the results are as follows:

[0118] The content of 4-hydroxy-2,5-dimethyl-3(2H)furanone, a typical burnt sweet aroma characteristic component, in the tobacco leaves obtained in Examples 1-3 was 19.45-19.72 μg / g; the content of 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one, a sweet aroma characteristic component, was 517.23-530.28 μg / g; the content of 5-hydroxymethylfurfural, an important tobacco aroma substance, was 2198.43-2204.97 μg / g, and the content of ionol was 51.55-54.61 μg / g; the content of palmitic acid, a main higher fatty acid that improves smoke comfort, was 384.25-397.45 μg / g, and .... The content of other ester substances, methyl palmitate, is 51.20-53.15μg / g. Compared with the original tobacco leaves: the content of 4-hydroxy-2,5-dimethyl-3(2H)furanone, a typical component of burnt sweet aroma, has increased by more than 26%; the content of 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one, a characteristic component of sweet aroma, has increased by more than 15%; the content of 5-hydroxymethylfurfural, an important aroma substance in tobacco, has increased by more than 16%, and the content of ionol has increased by more than 30%; the content of palmitic acid, the main higher fatty acid that improves smoke comfort, has increased by more than 88%, and the content of other ester substances, methyl palmitate, has increased by more than 30%.

[0119] In Example 4, when the flavor material is not soaked in water before mixing with the tobacco leaves, the increment of the flavor components will decrease. This is because the flavors of tea and stevia leaves can be better absorbed into the tobacco leaves after soaking in water.

[0120] In Example 5, when the tobacco leaves are not loosened and moistened before being mixed with the flavor materials, the increment of the flavor components will also decrease. This is because the moisture content of the tobacco leaves is too low when mixed, and the aroma of the flavor is poorly combined;

[0121] In Examples 6 and 7, when the mass ratio of tea powder to stevia leaf powder is not within the specified range of the present invention, the aroma content and quality of the final tobacco leaves will be affected;

[0122] In Examples 8 and 9, when the mass ratio of spices to tobacco leaves is not within the range defined in the present invention, the aroma component content of tobacco leaves is also affected;

[0123] In Example 10, when the moisture content of the tobacco leaves is too high after heating and humidification, the aroma content of the tobacco leaves will also be reduced;

[0124] It can be seen from Comparative Example 1 that when the heating and humidifying steps are missing, the moisture content of the tobacco leaves is too low, resulting in a too short drying time, and thus the spices and tobacco leaves cannot be fully mixed, and the increase in the flavor components is also poor;

[0125] It can be seen from Comparative Examples 2 and 3 that the steps of the method need to be performed in sequence and the order cannot be reversed. The steps are efficiently matched and synergistically enhanced to better improve the aroma content of the final tobacco leaves.

[0126] It can be seen from Comparative Examples 4-5 that when the flavor is not a mixture of tea and stevia leaves of the present invention, the flavor component content of the final tobacco leaves will be reduced.

[0127] Test Example 2

[0128] Organize 7 special grade tasters to perform sensory scoring on various indicators of tobacco leaves obtained by the methods described in Examples 1-8 of the present invention and Comparative Examples 1-8 according to the evaluation content and judging criteria in Table 2. The scoring criteria are shown in Table 2, and the scoring results are shown in Table 3 (the average value is taken for each group, and one decimal place is retained).

[0129] Table 2 Sensory index scoring scale

[0130]

[0131] Table 3 Sensory quality evaluation results of different samples

[0132]

[0133]

[0134] It can be seen from Table 3 that the tobacco leaves obtained by the method of the present invention have significantly improved aroma quality, aroma volume, softness and irritation.

[0135] The applicant declares that the present invention illustrates the preparation method and application of the tobacco shreds of the present invention through the above-mentioned embodiments, 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 the 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.

[0136] 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.

[0137] 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 enhanced tobacco shreds, characterized in that: The preparation method comprises: The tobacco leaves are cut into shreds and mixed with the flavor materials, and then heated, humidified, dried, and sealed, and the flavor materials are removed after standing to obtain the enhanced tobacco shreds; The flavor material includes a combination of tea powder and stevia leaf powder.

2. The method for preparing the enhanced tobacco shreds according to claim 1, characterized in that: The mass ratio of the tea powder to the stevia leaf powder is 1:(0.5-1.5).

3. The method for preparing the enhanced tobacco shreds according to claim 1 or 2, characterized in that: The mass ratio of the flavor material to the tobacco leaf is 1:(10-20), preferably 1:(13-18).

4. The method for preparing the enhanced tobacco shreds according to any one of claims 1 to 3, characterized in that: The tobacco leaves are loosened and moistened after being shredded, and then mixed with the flavor material; Preferably, the moisture content of the tobacco leaves after loosening and conditioning is 15-20%.

5. The method for preparing the enhanced tobacco shreds according to any one of claims 1 to 4, characterized in that: The flavor material is soaked with water before being mixed with tobacco leaves; Preferably, the temperature of the water is 80-90°C.

6. The method for preparing the enhanced tobacco shreds according to any one of claims 1 to 5, characterized in that: The heating and humidification are carried out in a HT rehumidification system; Preferably, the steam pressure of the HT rehumidification system is 0.8-1.5 bar.

7. The method for preparing the enhanced tobacco shreds according to claim 6, characterized in that: The temperature of the tobacco leaves after heating and humidification is 60-70°C; Preferably, the moisture content of the tobacco leaves after heating and humidification is 20-25%.

8. The method for preparing the enhanced tobacco shreds according to any one of claims 1 to 7, characterized in that: The drying is carried out in a drum dryer; Preferably, the drum wall temperature of the drum dryer is 110-120°C; Preferably, the moisture content of the dried tobacco leaves is 5-15%.

9. The method for preparing enhanced tobacco shreds according to any one of claims 1 to 8, characterized in that: The standing time is 1.5-3h.

10. A tobacco shred, characterized in that: The enhanced tobacco shreds are prepared by the method according to any one of claims 1 to 9.

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