Preparation and application of clove type characteristic reconstituted tobacco leaf

Abstract

The application discloses a preparation method and application of a clove-type characteristic reconstituted tobacco leaf, and relates to the technical field of tobacco processing, in particular to a preparation method of the clove-type characteristic reconstituted tobacco leaf.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and in particular to the preparation and application of clove-type reconstituted tobacco leaves. Background Technology

[0002] Indonesia, as the world's fourth-largest tobacco consumer market, holds a unique position reflected in its people's fondness for clove cigarettes. Data shows that up to 90% of Indonesian smokers prefer clove cigarettes to traditional white cigarettes. Clove cigarettes have a distinctive style, with a strong aroma of medicinal, spicy, woody, green, and smoky notes; and a distinct cooling, bitter, and spicy taste. Originally, clove cigarettes were handmade by mixing clove oil with tobacco leaves. Current clove-flavored cigarettes use dried clove buds as the flavoring material. The clove buds are cut into thin stems, mixed with shredded tobacco leaves, and then rolled into cigarettes. However, the buds are easily crushed into powder during the cutting process and are sieved out; the stems are hard, and the resulting stem slices are large and hard, easily piercing the cigarette paper. In addition, clove stalks are rich in clove oil and other oily substances. On the one hand, they can easily form grease on the surface of parts such as the air chamber guide rail, shovel, and tongue of the cigarette rolling equipment, which can hinder the movement of tobacco and cause tobacco blockage. On the other hand, they can also easily penetrate the surface of the cigarette paper to form oily smoke, which can cause quality problems.

[0003] Therefore, how to solve the above-mentioned quality problems while achieving the unique taste of clove cigarettes has become a technical challenge that urgently needs to be addressed in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a preparation and application of clove-type characteristic reconstituted tobacco leaves, which reduces potential quality risks while achieving the unique style and taste of clove cigarettes.

[0005] The technical problem to be solved by the present invention is achieved through the following technical solution:

[0006] A method for preparing clove-type reconstituted tobacco leaves includes the following steps:

[0007] (1) Clove oil extraction: Cloves were crushed and placed in a supercritical CO2 extraction device to extract clove oil and clove powder residue;

[0008] (2) Preparation of tobacco extract: The production residue is mixed with water for extraction, and the solid and liquid are separated to obtain residue and extract; the above operation is repeated to concentrate the extract to obtain tobacco concentrate;

[0009] (3) Preparation of tobacco-derived bacterial cellulose: Weigh 10% of tobacco extract, add acid to adjust the pH of the extract to 5, sterilize, inoculate with glucosamine strain, culture for 1 week, and then take out the brown bacterial cellulose membrane and homogenize it.

[0010] (4) Preparation of modified calcium carbonate: Mix powdered heavy calcium carbonate and anhydrous ethanol, stir, add stearic acid, reflux, cool to room temperature, filter, dry and grind to obtain modified calcium carbonate.

[0011] (5) Preparation of reconstituted tobacco leaf substrate: The tobacco extract residue from step (2) and the clove oil extract residue from step (1) are mixed and pulped. 8% of the tobacco bacterial cellulose from step (3) is added to adjust the pulp concentration to 0.5%. Functional additives and unmodified light spun-pituitary calcium carbonate (D50: 2~2.8μm) are added. The papermaking quantity is 60±2g / m 2 The moisture content of the reconstituted tobacco substrate is controlled at 20-28%.

[0012] (6) Preparation of coating solution: Add 1.0% to 2.5% glycerol and 0.1% to 0.5% hydroxypropyl methylcellulose to the tobacco concentrate in step (3), stir and react for 30 min, add 0.8% to 1.0% diammonium hydrogen phosphate (DAP) and stir to dissolve, then slowly add 2.5% to 5.0% modified heavy calcium carbonate powder, disperse evenly and then add 0.2% to 0.5% malic acid, dissolve to form coating solution;

[0013] (7) Preparation of clove-type reconstituted tobacco leaves: The reconstituted tobacco leaf substrate is prepared by dip coating. The tobacco concentrate from step (2) and the modified calcium carbonate from step (4) are transferred to the substrate from step (5). The coating rate is controlled to be 30% to 40%. After drying and adjusting the moisture content of the reconstituted tobacco leaves to 11.7%, the substrate is sent to a shredder for shredding. The shredding width is controlled to be 0.9 ± 0.1 mm.

[0014] (8) Adding fragrance: After drying, weigh the clove oil from step (1) and dissolve it in ethanol, then apply it to the filamentous reconstituted tobacco leaves from step (7) in the form of a spray.

[0015] Preferably, in the above technical solution, step (1) specifically includes:

[0016] Cloves were pulverized and placed in a supercritical CO2 extraction device for extraction for 4 hours at a pressure of 10 MPa and a temperature of 40°C. The residue was then analyzed at a pressure of 7.0 MPa and a temperature of 45°C to obtain clove oil and clove powder residue, which were then set aside for use.

[0017] Preferably, in the above technical solution, step (2) specifically includes:

[0018] The cigarette factory's production residue was added to twice the mass of water and extracted at 60°C for 40 minutes. Solid-liquid separation was then performed to obtain residue and extract.

[0019] Repeat the above steps to concentrate the extract to a density of (1.180±0.005) g / cm³. 3 The tobacco concentrate is refrigerated until ready for use.

[0020] Preferably, in the above technical solution, step (3) specifically includes:

[0021] Weigh 10% of the tobacco extract, add 10% by volume of dilute acetic acid to adjust the pH of the extract to 5, sterilize at 120℃ for 20 minutes, then inoculate the *Glucosinolates* strain into the above sterilized solution at an inoculation rate of 6-8% of the extract weight, shake, and incubate at 30℃ for 1 week. The resulting brown bacterial cellulose membrane floats on the surface of the solution, and is then removed and homogenized.

[0022] Preferably, in the above technical solution, the *Glucosamine* strain is ZT-01, which is deposited at the China General Microbiological Culture Collection Center, with accession number CGMCC No. 21544.

[0023] Preferably, in the above technical solution, step (4) specifically includes:

[0024] Powdered heavy calcium carbonate (D50: 13-15 μm) and anhydrous ethanol were added to a three-necked flask equipped with a mechanical stirrer and a reflux condenser, and stirred for 30 min to obtain a calcium carbonate anhydrous ethanol mixed solution.

[0025] Weigh out stearic acid and dissolve it in anhydrous ethanol. Add the solution in batches to a mixture of heavy calcium carbonate and anhydrous ethanol. After the addition is complete, reflux the reaction for 1 hour. After cooling to room temperature, filter, dry, and grind through a 500-mesh sieve to obtain modified calcium carbonate.

[0026] Preferably, in the above technical solution, step (5) specifically includes:

[0027] The tobacco extract residue from step (2) and the clove oil extract residue from step (1) are mixed and pulped, with the pulping degree controlled to be (20±2°)SR.

[0028] Weigh out 8% tobacco bacterial cellulose by mass, and control the freeness of the pulp to (50±2°)SR by pulping.

[0029] After mixing with tobacco pulp, the pulp concentration was adjusted to 0.5%, and 0.5% functional additives and 2.5% unmodified spunbond calcium carbonate were added. The basis weight of the paper was 60±2 g / m³ using a standard paper forming machine. 2 The moisture content of the reconstituted tobacco substrate is controlled at 20-28%.

[0030] Preferably, in the above technical solution, in step (6): relative to the mass of the concentrate, the addition ratio of glycerol is 1.0% to 2.5%, the addition ratio of hydroxypropyl methylcellulose is 0.1% to 0.5%, the addition ratio of diammonium hydrogen phosphate (DAP) is 0.8% to 1.0%, the addition ratio of modified heavy calcium carbonate powder is 2.5% to 5.0%, and the addition ratio of malic acid is 0.2% to 0.5%.

[0031] Preferably, in the above technical solution, in step (8), the amount of clove oil applied is 5.0 to 9.0 g / kg.

[0032] Application of a clove-type reconstituted tobacco leaf in cigarettes.

[0033] The above-described technical solution of the present invention has the following beneficial effects:

[0034] This invention adds clove oil extract residue, a non-tobacco substance, to the reconstituted tobacco substrate. On the one hand, this improves the utilization rate of plant resources, and on the other hand, it uses bacterial cellulose prepared from tobacco-derived extract to replace the wood pulp fiber in the reconstituted tobacco paper base, thereby reducing the production cost of reconstituted tobacco.

[0035] Secondly, half of the calcium carbonate is added from the slurry, and the other half is modified with stearic acid and added to the coating solution. This reduces the loss of calcium carbonate and the modified calcium carbonate changes from hydrophilic to lipophilic, reducing its aggregation in the coating solution. It also introduces a new hydrogen bond system, thereby improving the tensile strength and bulk of the reconstituted tobacco.

[0036] In addition, the use of flavoring filamentous reconstituted tobacco leaves not only improves the utilization rate of flavorings, but also effectively broadens the functionality and applicability of reconstituted tobacco leaves and shortens the development cycle of reconstituted tobacco leaves. Detailed Implementation

[0037] Various exemplary embodiments of the present invention will now be described in detail. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0038] Unless otherwise specified, all reagents used in this application are commercially available or obtained through commercial channels, or may be prepared by referring to existing chemical methods.

[0039] Example 1

[0040] (1) Preparation of clove oil:

[0041] Cloves were crushed and placed in a supercritical CO2 extraction device. The process conditions were: pressure 10 MPa, temperature 40℃, CO2 flow rate 22 L / h for 4 hours. The residue was then analyzed at a pressure of 7.0 MPa and a temperature of 45℃ to obtain clove oil and clove powder residue, which were then set aside for use.

[0042] (2) Preparation of tobacco extract:

[0043] 1000 kg (octane-dry weight) of cigarette factory waste was added to twice the weight of water and extracted at 60℃ for 40 min. Solid-liquid separation was then performed to obtain residue and extract.

[0044] Repeat the above steps, combining the extract and residue separately, and concentrate the extract to a density of (1.180±0.005) g / cm³. 3 The tobacco concentrate is refrigerated and stored for later use.

[0045] (3) Preparation of tobacco-derived bacterial cellulose:

[0046] Weigh 10% of the tobacco extract, add 10% by volume of dilute acetic acid to adjust the pH of the extract to 5, then dispense it into stoppered containers, seal the containers with sealing film, and sterilize at 120℃ for 20 minutes.

[0047] Then, at an inoculation rate of 6-8% of the extract weight, *Glucosinolates* strain ZT-01 was inoculated into the sterilized solution. After thorough shaking, the solution was incubated at a constant temperature of 30°C for one week, resulting in a brown bacterial cellulose membrane that floated on the surface of the solution. The brown cellulose membrane was then removed and homogenized in a standard disintegrant, yielding a slurry with a concentration of approximately 0.3%.

[0048] Gluconacetobacter sp. ZT-01 is deposited at the China General Microbiological Culture Collection Center (CGMCC), located at No. 3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing, on December 23, 2020, with accession number CGMCC No. 21544.

[0049] (4) Preparation of modified calcium carbonate: Add 90g of powdered heavy calcium carbonate (D50: 13~15μm) and 1000mL of anhydrous ethanol to a three-necked flask equipped with a mechanical stirrer and reflux condenser, and stir for 30min.

[0050] Weigh 4.0g of stearic acid and dissolve it in 100mL of anhydrous ethanol. Then add it in batches to the anhydrous ethanol solution of calcium carbonate. After the addition is complete, reflux the reaction for 1 hour. After cooling to room temperature, filter, dry, and grind through a 500-mesh sieve to obtain modified calcium carbonate.

[0051] (5) Preparation of reconstituted tobacco leaf substrate:

[0052] The residue from tobacco extract and the residue from clove oil extract were mixed and pulped, with the pulping degree controlled at (20±2°)SR.

[0053] Weigh out 80 kg of tobacco bacterial cellulose (8% by weight, relative to the pulp mass, the same below), and control the freeness of the pulp to (50±2°)SR through pulping. After mixing with tobacco dust pulp, adjust the pulp concentration to 0.5%, add 0.5% functional additive (cationic guar gum: nonionic guar gum = 1:1), and 2.5% unmodified spunbond calcium carbonate. Use a standard paper forming machine to produce a basis weight of 60±2 g / m³. 2 The moisture content of the reconstituted tobacco substrate is controlled at 20-28%.

[0054] (6) Preparation of coating solution:

[0055] Glycerin (1% addition ratio, relative to the mass of the concentrate, the same below) was added to the tobacco concentrate and stirred for 30 minutes. Then, diammonium hydrogen phosphate (DAP) (0.8% addition ratio) was added and stirred to dissolve. Modified heavy calcium carbonate powder (2.5% addition ratio) was then slowly added and stirred to form a uniform dispersion. Finally, malic acid (0.2% addition ratio) was added and dissolved for later use.

[0056] (7) Preparation of clove-type reconstituted tobacco:

[0057] The reconstituted tobacco substrate is prepared by dip coating, which transfers tobacco concentrate and modified calcium carbonate onto the substrate, controlling the coating rate to 40%, and then drying.

[0058] Example 2

[0059] Unlike Example 1, the coating rate was controlled at 35%.

[0060] Example 3

[0061] Unlike Example 1, the coating rate was controlled at 30%.

[0062] Comparative Example 1

[0063] Unlike Example 1, the percentage of wood pulp fiber was 8%, no bacterial cellulose was added, calcium carbonate was added intrapulp, and unmodified calcium carbonate was used at a ratio of 5.0%. Clove oil was added to the coating solution at a ratio of 5.0 g / kg of reconstituted tobacco leaves to obtain sheet-like reconstituted tobacco leaves, which were directly shredded without subsequent flavoring of shredded reconstituted tobacco leaves.

[0064] The reconstituted tobacco leaf substrate obtained above was subjected to physical property testing, and the results are shown in Table 1.

[0065] Physical property testing of reconstituted tobacco leaves:

[0066] Table 1. Test results of physicochemical properties of reconstituted tobacco leaves produced by papermaking.

[0067]

[0068] As shown in Table 1, the reconstituted tobacco prepared by this invention has significantly improved tensile index, bulkness, and calcium carbonate retention rate. This is because: on the one hand, after replacing exogenous wood pulp fiber with bacterial cellulose, bacterial cellulose has high tensile strength and elastic modulus, which can significantly improve the tensile strength of the tobacco substrate. At the same time, the high specific surface area and super adsorption capacity of bacterial cellulose, combined with the new hydrogen bond system introduced by modified calcium carbonate, can bind calcium carbonate, fine fibers and other materials together, which not only improves the utilization rate of materials such as calcium carbonate and fine fibers, but also further improves the tensile strength and bulkness of the tobacco substrate.

[0069] Preparation of clove-type filamentous reconstituted tobacco leaves (flavored):

[0070] Example 4

[0071] The reconstituted tobacco leaf base prepared in Example 1 was subjected to humidification treatment. After adjusting the moisture content of the reconstituted tobacco leaf to 11.7%, it was fed into a shredder to cut into shreds, and the shredding width was controlled to be 0.9±0.1mm.

[0072] A certain amount of clove oil was dissolved in ethanol, loaded into an atomizer, and sprayed in batches onto the surface of filamentous reconstituted tobacco leaves while stirring, thus obtaining clove-type specialty reconstituted tobacco leaves. The amount of clove oil added was 5.0 g / kg of filamentous reconstituted tobacco leaves.

[0073] Example 5

[0074] The reconstituted tobacco leaf base prepared in Example 2 was subjected to a humidification treatment. After adjusting the moisture content of the reconstituted tobacco leaf to 11.7%, it was fed into a shredder and shredded, with the shred width controlled at 0.9 ± 0.1 mm. Unlike Example 4, the clove oil application ratio was 6.0 g / kg of shredded reconstituted tobacco leaf.

[0075] Example 6

[0076] The reconstituted tobacco leaf base prepared in Example 3 was subjected to a humidification treatment. After adjusting the moisture content of the reconstituted tobacco leaf to 11.7%, it was fed into a shredder and shredded, with the shred width controlled at 0.9 ± 0.1 mm. Unlike Example 4, the clove oil application ratio was 7.0 g / kg of shredded reconstituted tobacco leaf.

[0077] Comparative Example 2

[0078] The reconstituted tobacco leaf base prepared in Comparative Example 1 was subjected to a humidification treatment to adjust the moisture content of the reconstituted tobacco leaves to 11.7%, and then fed into a shredder to cut them into shreds, controlling the shred width to be 0.9±0.1 mm. Since clove oil was already added to the coating solution in Comparative Example 1, no flavoring treatment was required.

[0079] Detection of the retention rate of clove oil main components in filamentous reconstituted tobacco leaves:

[0080] The main components of clove oil are eugenol, eugenol acetate, and caryophyllene. To verify the flavoring effect of clove oil, 2g of filamentous reconstituted tobacco leaves were weighed, 20ml of anhydrous ethanol was added, and the mixture was refluxed for 1h. After cooling to room temperature, the supernatant was collected, filtered through an organic filter membrane, and detected by gas chromatography. The results are shown in Table 2.

[0081] Table 2 Retention rate of major components of clove oil in filamentous reconstituted tobacco leaves

[0082]

[0083]

[0084] As shown in Table 2, when clove oil was added to the coating solution, the retention rates of eugenol and eugenol acetate were only 56.2% and 64.8%, respectively, while the retention rate of caryophyllene was even lower at 16.8%. This may be because the substrate still needs to undergo a high-temperature drying process after dip-coating, and the retention rate of key aroma components is difficult to control under high-temperature conditions, which also causes fluctuations in the quality of reconstituted tobacco products and waste. However, when clove oil is added to filamentous reconstituted tobacco, on the one hand, high-temperature treatment is not required after addition, and on the other hand, the filamentous reconstituted tobacco has a large specific surface area, which allows for more complete adsorption of clove oil, so the retention rate is above 90%.

[0085] Sensory evaluation of filamentous reconstituted tobacco leaves (flavored):

[0086] The filamentous reconstituted tobacco leaves obtained in Comparative Example 2 and Examples 4-6 were hand-rolled into cigarettes. The sensory evaluation of the prepared cigarette samples was carried out in accordance with the industry standard YC / T498 "Sensory Evaluation Method of Reconstituted Tobacco (Papermaking Method)" and the "Sensory Quality Evaluation Method of Reconstituted Tobacco Leaves of Henan Tobacco". The results are shown in Table 3.

[0087] Table 3 Sensory Quality Evaluation of Reconstituted Tobacco Leaves

[0088]

[0089] As can be seen from Table 3, compared with the addition of clove oil to the coating liquid, the clove-type reconstituted tobacco produced by adding clove oil to the filamentous reconstituted tobacco leaves has more obvious clove style characteristics, richer aroma, and improved aroma quantity, concentration, irritation, aftertaste and satisfaction, showing good application prospects.

[0090] Verification of the effect of finished cigarettes:

[0091] To further verify the application of clove-type reconstituted tobacco as a specialty ingredient in cigarettes, it was added to the tobacco of a certain brand of cigarettes at a ratio of 16%. Using the auxiliary materials of this brand (cigarette paper, tipping paper, and filter rod), the samples were rolled and packaged on a pilot production line to obtain the test verification samples. The conventional smoke components of the cigarettes were tested in accordance with GB / T 19609—2004 and GB / T 23355—2009 (see Table 4).

[0092] Table 4. Sensory Quality Evaluation Results of Cigarettes

[0093]

[0094] As shown in Table 4, compared with cigarette 1, cigarettes 2-4 have a more prominent unique style of clove-type cigarettes, richer aroma, more harmonious tobacco aroma and clove aroma, significantly increased aroma quantity and concentration, enhanced satisfaction, longer aroma and longer aftertaste.

[0095] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different choices and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A method for preparing clove-type reconstituted tobacco leaves, characterized in that, Includes the following steps: (1) Clove oil extraction: Cloves were crushed and placed in a supercritical CO2 extraction device to extract clove oil and clove powder residue; (2) Preparation of tobacco extract: The production residue is mixed with water for extraction, and the solid and liquid are separated to obtain residue and extract; the above operation is repeated to concentrate the extract to obtain tobacco concentrate; (3) Preparation of tobacco-derived bacterial cellulose: Weigh 10% of tobacco extract, add acid to adjust the pH of the extract to 5, sterilize, inoculate with glucosamine strain, culture for 1 week, and then take out the brown bacterial cellulose membrane and homogenize it. (4) Preparation of modified calcium carbonate: Mix powdered heavy calcium carbonate and anhydrous ethanol, stir, add stearic acid, reflux, cool to room temperature, filter, dry and grind to obtain modified calcium carbonate. (5) Preparation of reconstituted tobacco leaf substrate: The tobacco extract residue from step (2) and the clove oil extract residue from step (1) are mixed and pulped. 8% of the tobacco bacterial cellulose from step (3) is added, and the pulp concentration is adjusted to 0.5%. Functional additives and unmodified light spunbond calcium carbonate are added. The papermaking quantity is 60±2g / m 2 The moisture content of the reconstituted tobacco substrate is controlled at 20-28%. (6) Preparation of coating solution: Add 1.0% to 2.5% glycerol and 0.1% to 0.5% hydroxypropyl methylcellulose to the tobacco concentrate in step (3), stir and react for 30 min, add 0.8% to 1.0% diammonium hydrogen phosphate (DAP) and stir to dissolve, then slowly add 2.5% to 5.0% modified heavy calcium carbonate powder, disperse evenly and then add 0.2% to 0.5% malic acid, dissolve to form coating solution; (7) Preparation of clove-type reconstituted tobacco leaves: The reconstituted tobacco leaf substrate is prepared by dip coating. The tobacco concentrate from step (2) and the modified calcium carbonate from step (4) are transferred to the substrate from step (5). The coating rate is controlled to be 30% to 40%. After drying and adjusting the moisture content of the reconstituted tobacco leaves to 11.7%, the substrate is sent to a shredder for shredding. The shredding width is controlled to be 0.9 ± 0.1 mm. (8) Adding fragrance: After drying, weigh the clove oil from step (1) and dissolve it in ethanol, then apply it to the filamentous reconstituted tobacco leaves from step (7) in the form of a spray.

2. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, Step (1) is as follows: Cloves were pulverized and placed in a supercritical CO2 extraction device for extraction for 4 hours at a pressure of 10 MPa and a temperature of 40°C. The residue was then analyzed at a pressure of 7.0 MPa and a temperature of 45°C to obtain clove oil and clove powder residue, which were then set aside for use.

3. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, Step (2) specifically involves: The cigarette factory's production residue was added to twice the mass of water and extracted at 60°C for 40 minutes. Solid-liquid separation was then performed to obtain residue and extract. Repeat the above steps to concentrate the extract to a density of 1.180 ± 0.005 g / cm³. 3 The tobacco concentrate is refrigerated until ready for use.

4. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, Step (3) specifically involves: Weigh 10% of the tobacco extract, add 10% by volume of dilute acetic acid to adjust the pH of the extract to 5, sterilize at 120℃ for 20 minutes, then inoculate the *Glucosinolates* strain into the above sterilized solution at an inoculation rate of 6-8% of the extract weight, shake, and incubate at 30℃ for 1 week. The resulting brown bacterial cellulose membrane floats on the surface of the solution, and is then removed and homogenized.

5. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, The strain of *Glucosinolates* is ZT-01, which is deposited at the China General Microbiological Culture Collection Center, with accession number CGMCC No. 21544.

6. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, Step (4) is as follows: Powdered heavy calcium carbonate and anhydrous ethanol were added to a three-necked flask equipped with a mechanical stirrer and a reflux condenser, and stirred for 30 minutes to obtain a calcium carbonate-anhydrous ethanol mixed solution. Weigh out stearic acid and dissolve it in anhydrous ethanol. Add the solution in batches to a mixture of heavy calcium carbonate and anhydrous ethanol. After the addition is complete, reflux the reaction for 1 hour. After cooling to room temperature, filter, dry, and grind through a 500-mesh sieve to obtain modified calcium carbonate.

7. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, Step (5) specifically involves: The tobacco extract residue from step (2) and the clove oil extract residue from step (1) are mixed and pulped to control the pulping degree to 20±2°SR. Weigh out 8% tobacco bacterial cellulose by mass, and control the pulp freeness to 50±2°SR by pulping. After mixing with tobacco pulp, the pulp concentration was adjusted to 0.5%, and 0.5% functional additives and 2.5% unmodified spunbond calcium carbonate were added. The basis weight of the paper was 60±2 g / m³ using a standard paper forming machine. 2 The moisture content of the reconstituted tobacco substrate is controlled at 20-28%.

8. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, In step (6): relative to the mass of the concentrate, the addition ratio of glycerol is 1.0% to 2.5%, the addition ratio of hydroxypropyl methylcellulose is 0.1% to 0.5%, the addition ratio of DAP is 0.8% to 1.0%, the addition ratio of modified heavy calcium carbonate powder is 2.5% to 5.0%, and the addition ratio of malic acid is 0.2% to 0.5%.

9. The method for preparing clove-type reconstituted tobacco leaves according to claim 1, characterized in that, In step (8): the amount of clove oil applied is 5.0 to 9.0 g / kg.

10. The application of clove-type reconstituted tobacco obtained by any one of the preparation methods according to claims 1-9 in cigarettes.

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