Reconstituted tobacco for apparatus for heating tobacco without burning it

Abstract

The subject matter of the present application is reconstituted tobacco that is particularly suitable for use in equipment that heats the tobacco without burning it. In particular, the present application relates to the use of reconstituted tobacco in an apparatus for heating tobacco without burning it, where the reconstituted tobacco comprises: a substrate made of tobacco fibers that have undergone extraction in water; a tobacco water-soluble component; the tobacco fiber accounts for 30%-80% of the dry weight of the reconstituted tobacco; the tobacco water-soluble component accounts for 10%-35% of the reconstituted tobacco dry matter by weight; and the humectant accounts for 12%-25% of the dry matter of the reconstituted tobacco by weight.

Description

[0001] This application is a divisional application of an application with an application date of September 26, 2016, application number 201680061049.5, and invention name “Reconstituted tobacco with a device for heating tobacco without burning it”. Technical Field

[0002] The subject of the present invention is reconstituted tobacco for use in an apparatus for heating tobacco without burning it. Background Art

[0003] The combustion and pyrolysis phenomena of tobacco in cigarettes lead to the formation of many harmful components in the smoke. In order to avoid their formation, a large number of heating devices have been developed. For example, the applications with publication numbers WO2013 / 178769 and EP2644043 can be mentioned, which describe these devices. In these devices, tobacco is heated without burning it, which leads to the formation of aerosol. Therefore, this enables the smoker to inhale the tobacco aroma while significantly reducing his or her exposure to harmful components.

[0004] For these devices, conventional tobacco is unsuitable. In fact, it is necessary to add a large amount of humectants, such as glycerine or propylene glycol, to the tobacco to create an aerosol when the tobacco is heated. It is this aerosol that replaces cigarette smoke and is also where the nicotine and tobacco aroma are found. The tobacco used for heating devices can be in the form of tobacco sticks or capsules or bags containing shredded tobacco or rolled or rolled tobacco sheets or tobacco powder. To avoid variations in the quality of the aerosol, tobacco homogenization is very important, which is not easy to obtain in the case of natural tobacco blends. Summary of the invention

[0005] The inventors have developed a reconstituted tobacco that is particularly suitable for use in devices that heat tobacco without burning it. This reconstituted tobacco is very homogeneous and has good organoleptic qualities. This reconstituted tobacco, when heated, produces an aerosol that is less irritating to the throat, less stinging to the mouth, and has no burnt tobacco smell.

[0006] The present invention describes reconstituted tobacco comprising:

[0007] - tobacco fibers;

[0008] - water-soluble components of tobacco; and

[0009] - Moisturizer,

[0010] in:

[0011] The tobacco water-soluble components account for 10%-35% by weight of the reconstituted tobacco dry matter; and the humectant accounts for 8%-50% by weight of the reconstituted tobacco dry matter.

[0012] Typically, tobacco fibers comprise 30% to 80% of the dry matter of reconstituted tobacco.

[0013] Typically, tobacco fibers comprise 70% to 100% by weight of the fibers making up the reconstituted tobacco.

[0014] Typically, the remaining fibers are cellulosic plant fibers obtained by chemical or mechanical or thermomechanical cooking processes, such as wood pulp or pulp of annual plants such as flax or tobacco. Mixtures of these cellulosic plant fibers may also be used.

[0015] Reconstituted tobacco can be obtained from any type of tobacco (e.g., from Virginia tobacco, Burley tobacco, air-cured tobacco, dark air-cured tobacco, Oriental tobacco, sun-cured tobacco, fire-cured tobacco, or a tobacco blend). Typically, reconstituted tobacco is obtained by processing various types of tobacco.

[0016] Typically, reconstituted tobacco is produced by transformation of various parts / tissues of tobacco plants and their own transformation. Typically, reconstituted tobacco is obtained by processing threshed or mixed and cut tobacco leaves or tobacco fragments from tobacco leaves and tobacco stems. Typically, reconstituted tobacco will be obtained from tobacco parenchyma (leaf) with the optional addition of tobacco stems.

[0017] Tobacco water-soluble components correspond to all tobacco components that dissolve in water. Nicotine is a component of the water-soluble components.

[0018] Typically, the water-soluble components of tobacco comprise 40% to 60% by weight of the dry matter of the tobacco raw material.

[0019] To determine the weight percentage of water-soluble components of tobacco, the following method can be used:

[0020] The tobacco to be analyzed is ground to obtain a particle size less than or equal to 1 mm. Then, the ground tobacco is mixed with boiling water for 45 minutes to extract the whole tobacco water-soluble components. The weight of the tobacco water-soluble components is calculated by the difference between the dry weight of the tobacco sample and the dry weight of the fibrous residue after the extraction.

[0021] Assume that S (the weight percentage of dry matter of water-soluble components of tobacco in reconstituted tobacco) is Smin≤S≤Smax, the percentages of Smin and Smax are selected independently of each other, Smin is selected from the values ​​of 10%, 15% and 20%, and Smax is selected from the values ​​of 20%, 25%, 30%, 35%.

[0022] Preferably, Smin is equal to 20% and Smax is equal to 35%, or Smin is equal to 10% and Smax is equal to 30%, or Smin is equal to 10% and Smax is equal to 20%, or Smin is equal to 15% and Smax is equal to 35%, or Smin is equal to 15% and Smax is equal to 30%.

[0023] Most preferably, Smin is equal to 15% and Smax is equal to 30%.

[0024] According to a particular embodiment, the percentage S is about 15%, 17% or 21%.

[0025] Controlling the weight percentage of the water-soluble components of reconstituted tobacco by reducing it below the level naturally available from the tobacco raw material is important because the organoleptic properties of reconstituted tobacco depend in part on the amount of this fraction. In addition, above 35%, the aerosol produced during heating of the reconstituted tobacco begins to strongly irritate the throat, sting the mouth, and have a burnt tobacco flavor.

[0026] Assume that P (the dry matter weight percentage of the humectant in the reconstituted tobacco) is Pmin≤P≤Pmax, the percentages Pmin and Pmax are selected independently of each other, Pmin is selected from the values ​​of 8%, 10%, 12% and 15%, and Pmax is selected from the values ​​of 20%, 25%, 30%, 35%, 40%, 45% and 50%.

[0027] Preferably, Pmin is equal to 10% and Pmax is equal to 45%, or Pmin is equal to 12% and Pmax is equal to 40%, or Pmin is equal to 12% and Pmax is equal to 30%, or Pmin is equal to 15% and Pmax is equal to 20%.

[0028] Most preferably, Pmin is equal to 12% and Pmax is equal to 25%.

[0029] According to one particular embodiment, the percentage P is about 17%.

[0030] According to one embodiment, the humectant is glycerol, propylene glycol or a mixture of glycerol and propylene glycol.

[0031] According to a preferred embodiment, the humectant used is glycerol.

[0032] According to a preferred embodiment, the humectant used is a mixture of glycerol and propylene glycol.

[0033] Typically, the dry matter weight percentage of propylene glycol in the reconstituted tobacco is 1% to 25%.

[0034] Typically, the dry matter weight percentage of the humectant in the reconstituted tobacco is 10%-45% and the dry matter weight percentage of the propylene glycol in the reconstituted tobacco is 1%-20%; or the dry matter weight percentage of the humectant in the reconstituted tobacco is 12%-40% and the dry matter weight percentage of the propylene glycol in the reconstituted tobacco is 2%-20%, or the dry matter weight percentage of the humectant in the reconstituted tobacco is 12%-30% and the dry matter weight percentage of the propylene glycol in the reconstituted tobacco is 2%-15%, or the dry matter weight percentage of the humectant in the reconstituted tobacco is 15%-20% and the dry matter weight percentage of the propylene glycol in the reconstituted tobacco is 2%-10%.

[0035] Preferably, the dry matter weight percentage of the humectant in the reconstituted tobacco is 12%-25% and the dry matter weight percentage of the propylene glycol in the reconstituted tobacco is 2%-15%.

[0036] In order to manufacture reconstituted tobacco, many methods for reconstituted tobacco are known, for example, a papermaking method, a casting method or an extrusion method can be mentioned.

[0037] According to a preferred embodiment of the present invention, a papermaking process for reconstituted tobacco will be used.

[0038] According to this embodiment, the reconstituted tobacco according to the present invention is a reconstituted tobacco obtainable by a papermaking process.

[0039] One embodiment relates to a papermaking process for making reconstituted tobacco comprising the steps of:

[0040] - mixing tobacco parts from threshing or cutting with water to extract tobacco water-soluble products;

[0041] - Then, the water-soluble product is separated from the tobacco fibers,

[0042] - refining the tobacco fibers and passing them into a paper machine to form a base sheet;

[0043] - concentrating the tobacco water-soluble products obtained during extraction;

[0044] - adding all or some of the concentrated water-soluble product to a base sheet together with a humectant to form a reconstituted tobacco sheet according to the present invention.

[0045] One specific embodiment relates to a papermaking process for making reconstituted tobacco comprising the steps of:

[0046] - Mixing a portion of tobacco raw material from threshing or cutting with water to extract tobacco water-soluble products. This portion contains tobacco material selected from tobacco tissues richest in aromatic compound precursors to increase the organoleptic quality of the aerosol during heating. The water-soluble products are then separated from the tobacco fibers and concentrated;

[0047] - mixing another portion of the tobacco raw material from the threshed or cut leaves with water to extract tobacco water-soluble products - these water-soluble products are then discarded. This portion comprises tobacco material selected from tobacco tissues that are most depleted of aromatic compound precursors;

[0048] - the two parts of tobacco fibers are mixed, refined and introduced into a paper machine to form a base sheet;

[0049] - adding all or some of the concentrated water-soluble product to a base sheet together with a humectant to form a reconstituted tobacco sheet according to the present invention.

[0050] Typically, the tobacco raw material portion from threshing or cutting is collected and, after classification, mixed with water (e.g., in a digester), which allows the extraction of tobacco water-soluble products. The water-soluble components are then separated from the insoluble portion consisting essentially of tobacco fibers, e.g., the obtained slurry is passed through a screw press. Thus, in this papermaking process, the insoluble products are separated from the soluble products to treat them separately.

[0051] Typically, the water temperature used for extraction is 30°C-90°C, for example 30°C-70°C or 50°C-90°C. Typically, the water temperature will be adapted to the material to be treated. Typically, for treating tobacco stems / tobacco veins, the water temperature used for extraction may be 50°C-90°C, for treating tobacco parenchyma (leaves), the water temperature used for extraction may be 30°C-70°C.

[0052] For example, the fibers are first passed into a refiner and then into a paper machine to form a tobacco fiber sheet or base sheet.

[0053] Typically, the water-soluble components of tobacco obtained during extraction are concentrated (eg, in a vacuum evaporation apparatus) and then added in whole or in part to the base sheet along with a humectant to form a reconstituted tobacco sheet.

[0054] Typically, additives such as flavoring agents may be added to the base.

[0055] The amount of water-soluble product added to the base sheet will depend upon the percentage of water-soluble components desired for the reconstituted tobacco.

[0056] According to a preferred embodiment of the invention, the extraction steps are carried out on the tobacco parenchyma on the one hand and on the tobacco stems and tobacco veins on the other hand, and only the water-soluble products obtained during the extraction step carried out on the tobacco parenchyma are added to the substrate.

[0057] The reconstituted sheets are then processed in a drying plant.

[0058] This reconstituted tobacco sheet can then be cut into sheets, strips similar to tobacco rods, or rolled into rolls, which are then cut into reconstituted tobacco webs or ground into tobacco dust. Several sheets can be assembled to form a sheet composite. Typically, reconstituted tobacco according to the present invention can be shaped into the form of sheets, corrugated sheets, multi-layer sheets, leaves, strips, tobacco dust, or corrugated rods.

[0059] Specifically, this application provides the following:

[0060] 1. Reconstituted tobacco, including:

[0061] - tobacco fibers;

[0062] - water-soluble components of tobacco; and

[0063] - Moisturizer,

[0064] in:

[0065] The tobacco water-soluble components account for 10% to 35% by weight of the reconstituted tobacco dry matter; and

[0066] The humectant accounts for 8% to 50% by weight of the reconstituted tobacco dry matter.

[0067] 2. The reconstituted tobacco according to item 1, wherein the tobacco water-soluble components account for 15%-30% by weight of the reconstituted tobacco dry matter.

[0068] 3. The reconstituted tobacco according to item 1 or 2, wherein the humectant accounts for 12% to 30% by weight of the dry matter of the reconstituted tobacco.

[0069] 4. The reconstituted tobacco according to item 3, wherein the humectant accounts for 12%-25% by weight of the dry matter of the reconstituted tobacco.

[0070] 5. The reconstituted tobacco according to item 1, wherein the tobacco water-soluble component accounts for 15%-30% by weight of the reconstituted tobacco dry matter and the humectant accounts for 12%-25% by weight of the reconstituted tobacco dry matter.

[0071] 6. The reconstituted tobacco according to any one of items 1 to 5, wherein the humectant is glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.

[0072] 7. The reconstituted tobacco according to item 6, wherein the humectant is glycerin.

[0073] 8. The reconstituted tobacco according to item 6, wherein the humectant is a mixture of glycerol and propylene glycol.

[0074] 9. The reconstituted tobacco according to item 8, wherein the dry matter weight percentage of propylene glycol in the reconstituted tobacco is 1%-25%.

[0075] 10. The reconstituted tobacco according to any one of items 1 to 9, obtainable by a papermaking method.

[0076] 11. The reconstituted tobacco according to any one of items 1 to 10, formed into the form of a sheet, a corrugated sheet, a multi-layered sheet, a leaf, a strip, tobacco dust or a corrugated rod.

[0077] 12. A papermaking method for making reconstituted tobacco, comprising the steps of:

[0078] - mixing tobacco parts from threshing or cutting with water to extract tobacco water-soluble products;

[0079] - then, separating the water-soluble product from the tobacco fibers,

[0080] - refining the tobacco fibers and passing them into a paper machine to form a base sheet;

[0081] - concentrating the tobacco water-soluble products obtained during extraction;

[0082] - adding all or some of the concentrated water-soluble product to a base sheet together with a humectant to form a reconstituted tobacco sheet as defined in any one of items 1 to 11.

[0083] 13. The method according to item 12, wherein the temperature of water used for extraction is 30°C-90°C.

[0084] 14. A method according to item 13, wherein the tobacco part from threshing or cutting comprises tobacco parenchyma and tobacco stems and tobacco veins, and wherein the extraction step is carried out on the tobacco parenchyma on the one hand and on the tobacco stems and tobacco veins on the other hand, and only the water-soluble products obtained during the extraction step carried out on the tobacco parenchyma are added to the substrate.

[0085] 15. The method according to item 14, wherein the water temperature used for extraction is 50°C-90°C for treating the tobacco stems and tobacco veins, and the water temperature used for extraction is 30°C-70°C for treating the tobacco parenchyma. DETAILED DESCRIPTION

[0086] In all tables of the Examples, the sum of the humectant percentage, tobacco water-soluble component percentage and fiber percentage is 100% by weight of the reconstituted tobacco dry matter.

[0087] Example 1

[0088] In a laboratory, a mixture of Virginia tobacco, burley tobacco and oriental tobacco leaves was contacted with water under a 40°C water bath and manually stirred for 30 min. The water-soluble components were separated from the fiber portion by mechanical compression. Its dry matter concentration was about 5%. The water-soluble components were concentrated to a dry matter concentration of 47% under vacuum. Glycerol was added to the tobacco water-soluble components to obtain about 20% by weight in the final reconstituted tobacco.

[0089] Meanwhile, the Virginia tobacco stems were contacted with water in a water bath at 80° C. for 30 minutes. The water-soluble components were separated from the fiber portion by mechanical pressing and discarded.

[0090] Tobacco leaf fibers and tobacco stem fibers to which water and 10% lignocellulosic pulp expressed as % by weight of extracted tobacco mixture were added were mixed and transferred to a refiner. The fibers were refined for about 20 min.

[0091] A tobacco fiber sheet having a basis weight of about 75 g / m2 was formed on a laboratory paper machine. Glycerin was added to the concentrated water-soluble component. The concentrated tobacco water-soluble component containing glycerin was added to the tobacco fiber sheet by impregnation in a size press to achieve a basis weight of 109 g / m2. 2 The flakes thus obtained are dried and chopped.

[0092] The reconstituted tobacco thus obtained contained 18.8% glycerol (analyzed by gas chromatography (GC)), 0.34% total alkaloids, 3% reducing substances and 0.14% nitrates, all three of which were analyzed by continuous flow analysis. The water-soluble components of tobacco accounted for 11.8% of the weight of the dry matter of the reconstituted tobacco by weight. All percentages are calculated by dry matter weight.

[0093] The shredded tobacco was smoked in a Ploom Inc. / Pax Labs Inc. Pax heating system regulated at 210°C by introducing 250 mg of tobacco into the heating chamber. The researchers found light Virginia flavors of hay and tea types, a light sweet character, and noted low irritation (especially in the throat), all of which made the sample somewhat sensory neutral.

[0094] Example 2

[0095] In a laboratory under a water bath at 85°C, a mixture of Virginia tobacco, Burley tobacco and Oriental tobacco leaves was contacted with water and manually stirred for 30 min. The water-soluble components were separated from the fiber portion by mechanical compression. Its dry matter concentration was about 7%. The water-soluble components were concentrated under vacuum. Glycerol was added to the tobacco water-soluble components to obtain about 13% to 18% by weight in the final reconstituted tobacco.

[0096] The tobacco fibers to which water and 8% lignocellulosic pulp expressed as % by weight of the extracted tobacco mixture were added were mixed and transferred to a refiner. The fibers were refined for about 17 min.

[0097] Tobacco fiber sheets were formed on a laboratory paper machine. Glycerol was added to the concentrated water-soluble ingredients. The concentrated tobacco water-soluble ingredients containing glycerol were added to the tobacco fiber sheets by impregnation in a size press. The sheets thus obtained were dried and chopped.

[0098] The reconstituted tobacco thus obtained contained 13% to 18% glycerol (analyzed by gas chromatography (GC)). The water-soluble components of the tobacco were 15% to 40% as shown below. All percentages are by dry matter weight.

[0099]

[0100] The researchers smoked the shredded tobacco in a Pax heating system regulated at 199°C by introducing 250 mg of tobacco into the heating chamber.

[0101] The researchers found that for the 5 tests, the volume of smoke and the consistency of smoke were satisfactory, and the tobacco taste was also satisfactory, but tests A and D, although having a tobacco taste, were more irritating to the throat and more stinging in the mouth than the other tests, with a burnt smell, mouth residue, and a foul aftertaste.

[0102] Example 3

[0103] Various Virginia leaves were contacted with water in a water bath at 85°C in the laboratory and stirred manually for 30 min. The water-soluble components were separated from the fiber part by mechanical pressing. Its dry matter concentration was about 8%. The water-soluble components were concentrated under vacuum. Glycerol or glycerol and propylene glycol were added to the tobacco water-soluble components to obtain 7.5% to 21.8% by weight in the final reconstituted tobacco.

[0104] The tobacco fibers to which water and 8% lignocellulosic pulp expressed as % by weight of the extracted tobacco mixture were added were mixed and transferred to a refiner. The fibers were refined for about 20 min.

[0105] Tobacco fiber sheets are formed on a laboratory paper machine. Glycerol or glycerol and propylene glycol are added to the concentrated water-soluble ingredients. The concentrated tobacco water-soluble ingredients containing humectants are added to the tobacco fiber sheets by dipping in a size press. The sheets thus obtained are dried and chopped.

[0106] The reconstituted tobacco thus obtained contained 7.5%-21.8% glycerol and 0%-3.5% propylene glycol (analyzed by gas chromatography (GC)). The water-soluble components of the tobacco were 19%-32% as shown below. All percentages are based on dry matter weight.

[0107]

[0108] The researchers smoked this ground tobacco in a Pax heating system regulated at 210°C by introducing 250 mg of tobacco into the heating chamber.

[0109] The researchers found that Test B had greater smoke volume and a stronger tobacco flavor than Test A. Test C was slightly sweeter and less mouth irritating than Test B. Test D had greater smoke volume and body, a stronger tobacco flavor, and less mouth irritation than Test B.

[0110] Example 4

[0111] Various Virginia leaves were contacted with water in a water bath at 85°C in the laboratory and stirred manually for 30 min. The water-soluble components were separated from the fiber part by mechanical pressing. Its dry matter concentration was about 7%. The water-soluble components were concentrated under vacuum. Glycerin was added to the tobacco water-soluble components to obtain 16% to 17% by weight in the final reconstituted tobacco.

[0112] The tobacco fibers to which water and 8% lignocellulosic pulp expressed as % by weight of the extracted tobacco mixture were added were mixed and transferred to a refiner. The fibers were refined for about 21 min.

[0113] Tobacco fiber sheets were formed on a laboratory paper machine. Glycerol was added to the concentrated water-soluble ingredients. The concentrated tobacco water-soluble ingredients containing glycerol were added to the tobacco fiber sheets by impregnation in a size press. The sheets thus obtained were dried and chopped.

[0114] The reconstituted tobacco thus obtained contained 7.5% to 21.8% of glycerol (analyzed by gas chromatography (GC)). The water-soluble components of the tobacco were 9.1% to 39.7% as shown below. All percentages are by dry matter weight.

[0115]

[0116] The researchers smoked the shredded tobacco in a Pax heating system regulated at 199°C by introducing 250 mg of tobacco into the heating chamber.

[0117] The researchers found that Test A was more irritating in the throat, mouth, and nose than Test C. Test B had less throat irritation, less mouth stinging, and a stronger roasted, aged tobacco flavor than Test C.

[0118] Example 5

[0119] A blend made of 50% Virginia leaf and 50% Virginia stem was selected. For Test A, the stem and leaf were extracted together, and the combined stem and waste fiber and solubles were used to make reconstituted tobacco. For Tests B and C, the stem and leaf were extracted separately. For Test B, the Virginia stem solubles were discarded and only the leaf solubles were added back to the combined fiber. For Test C, the Virginia leaf solubles were discarded and only the stem solubles were added back to the combined fiber.

[0120] Tobacco component% Test A Test B Test C Virginia Leaf 50 50 50 Virginia Terrier 50 50 50 Remove soluble matter from stem blade At room temperature, % Test A Test B Test C glycerin 17.0 17.4 16.4 Tobacco water-soluble ingredients 28.8 28.9 29.2 Nicotine 0.54 0.74 0.28

[0121] The researchers smoked the shredded tobacco by introducing 250 mg of tobacco into the heating chamber in a Ploom Inc. / Pax Labs Inc. Pax heating system regulated at 199°C.

[0122] The researchers found that Test C had a lighter tobacco flavor with some off-flavors.

[0123] Example 6

[0124] A blend made of 50% white burley leaf and 50% white burley stem was selected. For Test A, the stem and leaf were extracted together and the combined stem and waste fiber and solubles were used to make reconstituted tobacco. For Tests B and C, the stem and leaf were extracted separately. For Test B, the solubles of the white burley stem were discarded and only the leaf solubles were added back to the combined fiber. For Test C, the solubles of the white burley leaf were discarded and only the stem solubles were added back to the combined fiber.

[0125] Tobacco component% Test A Test B Test C White burley leaves 50 50 50 White rib 50 50 50 Remove soluble matter from stem blade At room temperature, % Test A Test B Test C glycerin 16.8 17.6 18.7 Tobacco water-soluble ingredients 20.3 19.6 20.9 Nicotine 0.54 0.74 0.28

Claims

1. Use of reconstituted tobacco in a device for heating tobacco without burning it, wherein the reconstituted tobacco comprises: - a substrate made of tobacco fibers that have undergone extraction in water; - water-soluble components of tobacco; and - Moisturizer, in: The tobacco fibers account for 30% to 80% of the dry weight of the reconstituted tobacco; The tobacco water-soluble components account for 10% to 35% by weight of the reconstituted tobacco dry matter; and The humectant accounts for 12% to 25% by weight of the reconstituted tobacco dry matter.

2. The use according to claim 1, wherein The tobacco water-soluble components account for 20% to 35% by weight of the reconstituted tobacco dry matter, and The humectant accounts for 12%-20% by weight of the reconstituted tobacco dry matter.

3. The use according to claim 1, wherein the humectant is glycerol, propylene glycol or a mixture of glycerol and propylene glycol.

4. The use according to claim 1, wherein the humectant is glycerin.

5. The use according to claim 1, wherein the humectant is a mixture of glycerol and propylene glycol.

6. The use according to claim 5, wherein the dry matter weight percentage of propylene glycol in the reconstituted tobacco is 1%-25%.

7. The use according to claim 1, wherein the substrate further comprises cellulosic plant fibers.

8. Reconstituted tobacco, comprising - a substrate made of tobacco fibers that have undergone extraction in water; - water-soluble components of tobacco; and - Moisturizer, in: The tobacco fibers account for 30% to 80% of the dry weight of the reconstituted tobacco; The water-soluble tobacco components account for 10% to 35% by weight of the reconstituted tobacco dry matter; The humectant accounts for 12% to 25% by weight of the reconstituted tobacco dry matter; and The remainder is the substrate.

9. The reconstituted tobacco according to claim 8, wherein The tobacco water-soluble components account for 20% to 35% by weight of the reconstituted tobacco dry matter, and The humectant accounts for 12%-20% by weight of the reconstituted tobacco dry matter.

10. The reconstituted tobacco according to claim 8, wherein the humectant is glycerol, propylene glycol, or a mixture of glycerol and propylene glycol.

11. The reconstituted tobacco according to claim 8, wherein the humectant is glycerin.

12. The reconstituted tobacco according to claim 8, wherein the humectant is a mixture of glycerin and propylene glycol.

13. The reconstituted tobacco according to claim 12, wherein the dry matter weight percentage of propylene glycol in the reconstituted tobacco is 1%-25%.

14. The reconstituted tobacco according to claim 8, wherein the substrate further comprises cellulosic plant fibers.

15. A papermaking method for producing reconstituted tobacco according to any one of claims 8 to 14, comprising the following steps: - mixing tobacco parts from threshing or cutting with water to extract tobacco water-soluble products; - then, separating the water-soluble product from the tobacco fibers, - refining the tobacco fibers and passing them into a paper machine to form a base sheet; - concentrating the tobacco water-soluble products obtained during extraction; - adding all or some of the concentrated water-soluble product together with a humectant to the base sheet to form the reconstituted tobacco.

16. A papermaking method for making the reconstituted tobacco according to claim 14, comprising the following steps: - mixing tobacco parts from threshed or cut leaves with cellulosic plant fibers and water to extract tobacco water-soluble products; - then, separating the water-soluble product from the tobacco fibers and the cellulosic plant fibers, - refining the tobacco fibers and the cellulosic plant fibers and passing them into a paper machine to form a base sheet; - concentrating the tobacco water-soluble products obtained during extraction; - adding all or some of the concentrated water-soluble product together with a humectant to the base sheet to form the reconstituted tobacco.

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