FR3072003A1 - RECONSTITUTED PLANT FOIL FOR TOBACCO HEATING DEVICES WITHOUT BURNING - Google Patents

Abstract

The invention relates to a reconstituted plant plant leaf adapted to tobacco heating devices without burning it, said reconstituted plant leaf and comprising one or two fibrous supports obtained by a papermaking process and comprising plant fibers, a plant extract and a solid additive.

Description

Field of the invention

The invention is in the field of devices for heating tobacco without burning it, and relates to a reconstituted plant leaf obtained by a papermaking process and comprising solid additives.

Context of the invention

A large number of tobacco heaters without burning it have been developed to prevent the formation of harmful constituents during the combustion of tobacco. By way of example, mention may be made of the applications published under the numbers WO 2016/026810 and WO 2016/207407 which describe such devices. In these devices, the tobacco is heated to a temperature below the combustion temperature without being burnt, which leads to the formation of an aerosol. The aerosol generated during the heating of tobacco replaces cigarette smoke, has interesting organoleptic properties and is inhaled by the user. This allows the user to inhale the aromas of tobacco while significantly reducing their exposure to harmful constituents.

Conventional tobacco is not suitable for such devices, because it does not generate a large amount of aerosol having interesting organoleptic properties. Reconstituted tobacco is more suitable for these heating devices because it generates a large amount of aerosol with interesting organoleptic properties.

However, it remains important to properly control the amount of tobacco flavor in the aerosol formed so as not to create frustration for the user of the heating devices. It may also be advantageous to deliver to the user heating devices with flavors different from those of tobacco.

In order to diversify the flavors and control the quantity in the aerosol, it is possible to add solid additives to the reconstituted tobacco. However, this poses the problem of the loss of solid additives added to the reconstituted tobacco.

The inventors have developed a reconstituted plant leaf comprising:

- 1 or 2 fibrous supports comprising plant fibers,

- a plant extract, and

- a solid additive.

If the reconstituted plant leaf of the invention comprises 1 fibrous support, then the additive is fixed on the support by the plant extract. The loss of additive by the reconstituted plant of the invention is therefore advantageously minimized.

If the reconstituted plant leaf of the invention comprises 2 fibrous supports, then the additive is trapped between the 2 fibrous supports and the plant extract makes it possible to fix the 2 fibrous supports between them. The loss of additive by the reconstituted plant of the invention is all the more minimized.

For the purposes of the present application, fibrous support denotes a base sheet (web base in English) comprising refined plant fibers, the base sheet being obtained by a papermaking process. The fibrous support has two sides, a front side and a back side.

Typically, each fibrous support may comprise fibers from the same plant or a fibrous support may comprise fibers from one plant and the other support may comprise fibers from another plant. Typically each fibrous support can comprise fibers from one or more plants.

Typically the one or both fibrous supports comprise the plant extract.

Typically the solid additive is in contact with a fibrous support. For example, the solid additive can be on a fibrous support, in a fibrous support, on and in a fibrous support, or between the 2 fibrous supports.

Typically, the solid additive may be plant dust, a diluent, a texturing agent, a powdered or encapsulated flavor, a color, a gel or a mixture thereof, in particular plant dust.

The solid additive content will depend on the solid additive. Typically the dry matter content by weight of the solid additive in the reconstituted plant leaf can be from 0.1% to 70%, in particular from 5% to 50%, very particularly from 12% to 35%.

For the purposes of the present application, plant dust denotes a plant particle whose size is between 0.01 pm to 50 pm, in particular from 0.025 pm to 30 pm, very particularly from 0.05 pm to 20 pm. Typically plant dust includes the aromatic compounds which give the aerosol the aromas of the plant. Typically plant dust can result from different parts of the plant, the parts of the plant being parts of the plant themselves or the result of the transformation of different parts of the plant. Typically plant dust can be obtained by treating one or more parts of the plant, such as chopping, threshing or mixing and chopping parts of the plant.

The weight content of plant dust is determined by controlling the amount of plant dust incorporated during the manufacture of the reconstituted plant leaf.

Typically the dry matter content by weight of plant dust in the reconstituted plant leaf can be from 1% to 70%, in particular from 5% to 65%, very particularly from 10% to 30%.

Typically the diluent can be CaCCh.

Typically the texturing agent can be guar gum, potato starch, agaragar or a mixture of these.

Typically the powdered flavor can be cocoa powder, tripotassium citrate, an aromatic powder preparation

Typically the colorant may be beta-carotene, sunset yellow, apricot juice powder, turmeric.

Typically the gel can be silica gel, polysaccharide gel, alumina gel or a mixture thereof.

Typically the silica gel can be an amorphous silica gel, a modified silica gel such as an Amino Propyl Silyl (APS) modified silica gel, an Amino Ethyl Amino Propyl Silyl (AEPS) modified silica gel, a gel of modified silica Amino Ethyl Amino Ethyl Amino Propyl Silyl (AEAEAPS), or a mixture of these,

The plant extract corresponds to all of the water-soluble products of the plant. Advantageously, the plant extract comprises the compounds which confer organoleptic properties and / or therapeutic properties to the aerosol.

The dry matter content of the plant extract included in the reconstituted plant leaf of the present invention may depend on the organoleptic and therapeutic properties of the aerosol formed by the heating of said reconstituted plant leaf. The dry matter content by weight of the plant extract depends on the plant used and, more particularly, on the content of aromatic compounds or of compounds exhibiting therapeutic properties of the plant used.

Let Sp be the dry matter content by weight of the plant extract included in the reconstituted plant leaf of the present invention. Typically S _p can be from 5% to 47%, in particular from 25% to 45%.

To determine Sp, we can use the following method:

The reconstituted plant leaf to be analyzed is crushed to reach a particle size of less than or equal to 1 mm. The reconstituted plant leaf is then mixed with boiling water for 30 minutes to extract the entire plant extract. Sp, is calculated by the difference between the dry weight of the sample of reconstituted plant leaf to be analyzed and the dry weight of the fibrous residue after extraction.

Typically the fibrous support (s) of the reconstituted plant leaf of the invention may also comprise an aerosol generating agent.

The aerosol generating agent is a compound which allows the formation of an aerosol when heated, for example in contact with hot air.

Typically, the aerosol generating agent represents from 8% to 50%, in particular from 10% to 40%, more particularly from 15% to 35% by weight in dry matter of the mixed leaf of reconstituted plant.

According to one embodiment the content by weight of dry matter of plant extract and aerosol generating agent in the sheet of the invention is from 8% to 55%, in particular from 10% to 46%, more particularly from 20% to 45%.

Typically the aerosol generating agent can be a polyol, a non-polyol or a mixture thereof. Typically a polyol generating agent can be sorbitol, glycerin, propylene glycol, triethylene glycol or a mixture thereof. Typically a nonpolyol generating agent can be lactic acid, glyceryl diacetate, glyceryl triacetate, triethyl citrate or isopropyl myristate or a mixture thereof.

According to one embodiment, the aerosol generating agent is glycerin, propylene glycol, or a mixture of glycerin and propylene glycol, glycerin being preferred.

An aerosol can be generated during the heating of the reconstituted plant leaf of the invention comprising an aerosol generating agent. Advantageously, the fibrous support comprises aromatic compounds so that the aerosol generated by the heating of the reconstituted plant leaf has organoleptic properties of interest to the user. Likewise the plant extract and, where appropriate, the solid additive give the aerosol aromas of the plant. By simply changing the reconstituted plant leaf, the user can easily vary the aromas of the aerosol generated by the heating of said reconstituted plant leaf.

The plant extract and the solid additive are also distributed in a controlled manner in the reconstituted plant leaf of the invention. Thanks to this control, the concentration of aromas in the aerosol is advantageously constant, which does not cause frustration for the user.

Plant fibers, plant extract and plant dust can be independently obtained from a plant selected from spore plants, seed plants or a mixture thereof. In particular, the plant can be a plant chosen from the tobacco plant, food plants, aromatic plants, perfume plants, medicinal plants, plants of the Cannabaceae family, or a mixture of these, any particularly the plant may be the tobacco plant.

If the plant is a medicinal plant, the aerosol generated by the heating of the reconstituted plant leaf may also have therapeutic properties so that the reconstituted plant leaf can be used for therapeutic treatment.

Advantageously, a plant extract obtained from a mixture of plants makes it possible to offer a wide range of organoleptic properties and / or therapeutic properties. Advantageously, plant dust obtained from a mixture of plants makes it possible to offer a wide range of organoleptic properties and / or therapeutic properties. A mixture of plants also makes it possible to counterbalance the unpleasant organoleptic properties of a plant of the mixture, for example a medicinal plant, by the pleasant organoleptic properties of another plant of the mixture, for example the tobacco plant, an aromatic plant or a perfume plant.

Typically plant fibers can be obtained from a first plant, plant extract can be obtained from the first plant or from a second plant and plant dust can be obtained from the first plant , the second plant or a third plant. Indeed, the fibers of a plant may not have mechanical properties allowing the formation of a fibrous support, nevertheless the extract and the dust of this plant can confer organoleptic and / or therapeutic properties on the aerosol. sought. Conversely, the fibers of a plant may have mechanical properties allowing the formation of the leaf or leaves comprising plant fibers, but the extract and the dusts of this plant may not give the aerosol organoleptic properties and / or therapeutic properties sought. In addition, by mixing an extract of a plant with dust from another plant, it is possible to obtain a reconstituted plant leaf generating an aerosol having multiple organoleptic properties and / or therapeutic properties.

Advantageously mixing plants to obtain the plant fibers makes it possible to adapt the mechanical properties of the reconstituted plant leaf and / or the organoleptic or chemical properties of the aerosol.

When the plant is the tobacco plant, then the tobacco fibers, the tobacco extract and the tobacco dust can be obtained from any tobacco plant or type of tobacco, for example Virginia tobacco , Burley tobacco, air-cured tobacco, dark aircured tobacco, Oriental tobacco, sun-cured tobacco, fire-cured tobacco or a mixture thereof.

Typically the food plants are garlic, coffee, ginger, licorice, rooibos, stevia rebaudiana, tea, cocoa, chamomile, mate.

Typically the aromatic plants are basil, turmeric, clove, bay leaf, oregano, mint, rosemary, sage, thyme.

Typically the scent plants are lavender, rose, eucalyptus.

Typically medicinal plants are those indicated in the document, list A of medicinal plants traditionally used (French Pharmacopoeia January 2016, published by the National Agency for Drug Safety (ANSM) or plants known to include compounds with therapeutic properties. Typically the medicinal plants listed are ginkgo, ginseng, morello cherry, peppermint, willow and red vine.

Typically there are among medicinal plants known to include compounds with therapeutic properties, eucalyptus.

Typically the plant fibers and the plant extract of the reconstituted plant leaf of the present invention may result from different parts of the plant, the parts of the plant being parts of the plant themselves or the result of transformation. from different parts of the plant. Typically the parts of the plant can be whole parts of the plant or debris from threshing or mixing and chopping parts of the plant.

Typically the parts of the plant can be selected from the parts of the plant which are richest in aromatic compounds which give the aerosol its organoleptic properties. Typically these parts can be the whole plant, the aerial parts of the plant such as the flower bud, branch bark, stem bark, leaves, flower, fruit and its peduncle, seed, petal. , flowering tops, or underground parts, for example, the bulb, roots, root bark, rhizome, or a mixture thereof. The part of the plant can also be the result of the mechanical, chemical or mechanical-chemical transformation of one or more parts of the plant, such as for example the shell protecting the cocoa bean resulting from the hulling process of the beans

Typically the parts of the tobacco plant can be the parts richest in aromatic compounds which confer on the aerosol its organoleptic properties. Typically the parts of the tobacco plant can be the parenchyma (lamina) possibly added with ribs (stems) from the tobacco plant. Typically the parts of the tobacco plant can be the leaves of the tobacco plant or the debris from threshing or mixing and chopping into scaferlati the leaves and ribs of the tobacco plant.

Among the food plants, one can select as parts, for example, the bulb of garlic, the fruit of coffee, the rhizome of ginger, the root of licorice and the leaves of rooibbos, stevia rebaudiana, or tea.

Among the aromatic plants, one can select as parts, for example, the flower buds of the clove (cloves), the leaves of basil, bay leaf and sage, the leaves and flowering tops of mint, l oregano, rosemary and thyme, or the turmeric rhizome.

Typically among perfume plants, you can select the flower and flowering tops of lavender, or the flower bud and petals of the rose.

Among the medicinal plants listed in the French pharmacopoeia, one can select, for example, the ginkgo leaf, the underground part of ginseng, the peduncle of the fruit (cherry tail) of the morello cherry, the leaves and the flowering top of the peppermint , stem bark and willow leaves, or red vine leaves.

Typically the dry matter content of the plant fibers included in the reconstituted plant leaf is from 20% to 92%, in particular from 25% to 75%, more particularly from 30% to 45%.

Typically the fibrous support (s) of the reconstituted plant leaf may also comprise vegetable cellulosic fibers.

Plant cellulosic fibers are fibers obtained by a chemical or mechanical or thermo-mechanical cooking process such as wood pulp, hemp, or annual plants such as flax for example. A mixture of these vegetable cellulosic fibers can also be used.

Advantageously, these vegetable cellulosic fibers can improve the mechanical strength properties of the reconstituted plant leaf.

Typically vegetable cellulosic fibers can represent from 0.5% to 15%, in particular from 5% to 10%, more particularly 8% by weight in dry matter of the reconstituted plant leaf.

Typically the reconstituted plant leaf comprising 1 fibrous support can have a basis weight of 20 g / m ² to 150 g / m ² , in particular from 50 g / m ² to 100 g / m ² , very particularly 62 g / m ² at 68 g / m ² .

Typically the reconstituted plant leaf comprising 2 fibrous supports can have a basis weight of 50 g / m ² to 250 g / m ² , in particular from 100 g / m ² to 150 g / m ² , very particularly of 110 g / m ² at 115 g / m ² .

Advantageously, the grammage of the sheet of the invention makes it possible to obtain a burst strength allowing the implementation of the sheet in a heating appliance.

Typically the water content in the reconstituted plant leaf of the invention is less than 20%, in particular from 3% to 15%, very particularly from 5% to 12%.

According to a particular embodiment, the reconstituted plant leaf comprises:

fibrous support comprising a plant extract and an aerosol generating agent, and

- plant dust in contact with the fibrous support, in which:

the dry matter content by weight of the plant fibers in said reconstituted plant leaf is from 5% to 92%, in particular from 10% to 70%, more particularly from 30% to 35%,

- the aerosol generating agent represents from 0% to 50%, in particular from 8% to 40%, more particularly from 15% to 35% by weight in dry matter of the mixed leaf of reconstituted plant,

the dry matter content by weight of plant dust in said reconstituted plant leaf can be from 10% to 70%, in particular from 15% to 65%, very particularly from 25% to 35% by dry weight relative to the total weight of, and

- the dry matter content by weight of the plant extract in said reconstituted plant leaf is from 5% to 47%, in particular from 35% to 45%.

According to a particular embodiment, the reconstituted plant leaf comprises:

- at least one of the 2 fibrous supports comprising a plant extract and an aerosol generating agent, and

- plant dust in contact with the fibrous support, in which:

the dry matter content by weight of the plant fibers in said reconstituted plant leaf is from 5% to 92%, in particular from 10% to 70%, more particularly from 35% to 45%,

- the aerosol generating agent represents from 0% to 50%, in particular from 8% to 40%, more particularly from 15% to 35% by weight in dry matter of the mixed leaf of reconstituted plant,

the dry matter content by weight of plant dust in said reconstituted plant leaf can be from 5% to 70%, in particular from 10% to 65%, very particularly from 11% to 13% by dry weight relative to the total weight of, and

- the dry matter content by weight of the plant extract in said reconstituted plant leaf is from 5% to 47%, in particular from 20% to 45%.

Typically the reconstituted plant leaf of the present invention comprising 1 fibrous support can be produced according to a process comprising the following steps:

ai) supply of the fibrous support, bi) bringing the plant extract into contact with the fibrous support, and ci) bringing the solid additive into contact with the fibrous support, step bi) being able to be carried out at the same time as step ci), said method further comprising a step:

si) drying after step ci) bringing the solid additive into contact with the fibrous support.

Typically the reconstituted plant leaf of the present invention comprising 2 fibrous supports can be manufactured according to a process comprising the following steps:

a2) supply of the 2 fibrous supports, b2) bringing the plant extract into contact with at least one of the 2 fibrous supports,

C2) bringing the solid additive into contact with at least one of the 2 fibrous supports, and d2) stacking the 2 fibrous supports so that the solid additive is included between the 2 fibrous supports, step b2) can be carried out at the same time as step C2), said method further comprising a step:

S2) drying after step d2) stacking the 2 fibrous supports.

According to the invention the fibrous support (s) are produced using a papermaking process. Typically the fibrous support (s) provided during step ai) or a2) can be obtained by passing the refined plant fibers through a paper machine. According to a preferred embodiment of the invention, a papermaking process will be used. According to this embodiment, a leaf of reconstituted plant according to the invention is a leaf of reconstituted plant capable of being obtained by a papermaking process.

Typically the fibrous support (s) supplied during step ai) or a2) can be wet and therefore have at least one wet face. The fibrous support (s) can typically have a water content of 20% to 80%, in particular from 25% to 70%, very particularly from 30% to 60%.

Typically the fibrous support (s) supplied during step ai) or a2) can have a grammage of 10 g / m ² to 60 g / m ² , in particular from 20 g / m ² to 55 g / m ² , all particularly from 32 g / m ² to 62 g / m ² .

According to one embodiment, the plant fibers of the fibrous support and the plant extract are obtained according to the following steps:

e) mixing one or more parts of the plant with a solvent in order to extract the plant extract from the plant fibers,

f) separation of the plant extract from the plant fibers.

The plant extract and the plant fibers are therefore typically obtained by a dissociation process. During step e), one or more parts of the plant are mixed with a solvent, for example in a digester, in order to extract the plant extract from the plant fibers. In step f), the plant extract is separated from the plant fibers, for example by passing through a screw press, to isolate and obtain, on the one hand, the plant fibers and, on the other hand , the plant extract.

Typically the solvent can be an apolar solvent, an aprotic polar solvent, a protic polar solvent or a mixture of these, in particular the solvent can be methanol, dichloromethane, ethanol, acetone, butanol, water or a mixture of these, more particularly the solvent is ethanol, acetone, water or a mixture of these.

According to a particular embodiment, the solvent is an aqueous solvent, very particularly the solvent is water.

A person skilled in the art will know how to adapt the temperature of the solvent during step e) to the plant, to the part of the plant and to the parts of the plant to be treated. Typically, the temperature of the solvent when processing a root or bark will be higher than the temperature of the solvent when processing a leaf or petal.

Typically the temperature of the solvent during step e) can be from 10 ° C to 100 ° C, in particular from 30 ° C to 90 ° C, more particularly from 50 ° C to 80 ° C.

Depending on the embodiment in which the solvent is water and the plant is tobacco, the temperature of the water can typically be between 30 ° C. and 80 ° C. Typically for the treatment of the ribs of a tobacco plant, the water temperature can be between 50 ° C and

80 ° C. Typically for the treatment of parenchyma of a tobacco plant, the water temperature can be between 30 ° C and 70 ° C.

Typically the plant fibers are refined in a refiner and can then be passed through the paper machine to form the fibrous support.

Typically the plant fibers can come from different plants.

The fibers of each plant can be obtained separately according to the dissociation process described above. They can then be mixed so that this mixture of fibers from different plants passes through the paper machine to constitute the fibrous support. It is also possible to obtain fibers from different plants together by gathering one or more parts of the different plants and then subjecting them to the dissociation process described above. The water temperature will then be adapted to the plants to be treated and, in particular, to the plant requiring the highest water temperature to extract the extract from this plant. This alternative embodiment is very advantageous because it makes it possible to obtain the fibers of the different plants without implementing several methods of dissociation in parallel.

Typically the plant extract can be an extract from different plants.

The extract of different plants can be obtained by mixing different plant extracts obtained separately according to the dissociation process described above. It is also possible to obtain the extract of different plants by gathering one or parts of the different plants and then subjecting them to the dissociation process described above. The water temperature will then be adapted to the plants to be treated and, in particular, to the plant requiring the highest water temperature to extract the extract of this water-soluble plant. This alternative embodiment is very advantageous since it makes it possible to obtain the extract of different plants without implementing several processes in parallel. In these two cases, the extract of different plants is brought into contact with the fibrous support during steps bi) and b2).

Typically different plant extracts, obtained according to the dissociation method described above, can also be brought into contact with the fibrous support (s) separately during steps bi) and b2).

Typically, during step b2), the plant extract can be brought into contact with a fibrous support or the two fibrous supports.

Typically, during step bi) or b2), the plant extract can be brought into contact with one face of the fibrous support or supports or with the two faces of the fibrous support or supports.

Typically steps bi) and b2) of bringing the plant extract into contact can be carried out by impregnation or by spraying, in particular by impregnation. Typically the impregnation can be carried out using a size press.

Typically the plant extract can be concentrated before being brought into contact with the fibrous support (s) during steps bi) and b2). A device such as a vacuum evaporation device can be used to concentrate the plant extract.

Steps ci) and C2) allow the solid additive to be brought into contact with at least one of the two faces of the fibrous support (s), in particular a wet face of the support (s), more particularly the face of the fibrous support (s) contact with plant extract. Typically this step makes it possible to disperse the solid additive on and / or in the fibrous support (s).

Typically steps Ci) and C2) of bringing the solid additive into contact can be carried out by dispersion or by dusting, in particular by dusting.

When steps bi) and b2) are carried out at the same time as step ci) and C2), then the plant extract can typically be mixed with the solid additive and this mixture is brought into contact with the support (s) fibrous. Typically, this mixture may be brought into contact by impregnation or by spraying, in particular by impregnation. Typically the impregnation can be carried out using a size press.

When the reconstituted plant leaf of the present invention comprises an aerosol generating agent, then said aerosol generating agent is brought into contact with the fibrous support (s) before, after or at the same time as the plant extract, than the solid additive or the mixture of plant extract and solid additive, in particular at the same time as the plant extract.

Typically step d2) may have the objective of covering the face of the fibrous support in contact with the solid additive by the other fibrous support. When the two fibrous supports have one face in contact with the solid additive, then step d2) typically has the objective of bringing these two faces into contact so that the solid additive is between the two fibrous supports.

Typically step d2) of stacking the fibrous supports can be carried out by adhesion of the face of the fibrous support (s) in contact with the solid additive with the face of the other fibrous support. In order to facilitate the adhesion of the two faces, the face of the other fibrous support can be wet.

Typically the drying step if) allows the solid additive to be fixed to the fibrous supports to form the reconstituted plant leaf.

Typically the drying step S2) makes it possible to fix the fibrous supports between them and to trap the solid additive between the fibrous supports to form the sheet of reconstituted plant.

Those skilled in the art will be able to adapt the parameters of the drying steps si) and S2) to allow the attachment of the solid additive to the fibrous support (s).

Typically, during drying steps si) and S2), the drying temperature can be from 90 ° C to 130 ° C, in particular from 70 ° C to 110 ° C when the reconstituted plant leaf comprises a generating agent. 'aerosol.

Typically steps Si) and S2) can be carried out by an infrared ramp, drying rollers in an American battery, drying with hot air in a tunnel dryer, a vertical dryer, a fluidized bed dryer, a pneumatic dryer, in particular in a tunnel dryer.

The reconstituted plant leaf of the invention can then be cut into leaves, sheets similar to tobacco strips or rolled up in a roll. Several sheets can be joined to form a mixture of sheets.

The reconstituted plant leaf of the invention comprising the generating agent can be used in a tobacco heater without burning it.

Within the meaning of the present invention, the term device for heating tobacco without burning it means any device allowing the formation of an aerosol intended to be inhaled by a consumer. The aerosol replaces smoke, allowing the user to inhale the aromas of the plant while significantly reducing their exposure to harmful constituents.

Typically a heating device comprises, in the direction of the air flow, an air inlet, a heating body, a location intended for the installation and maintenance of the reconstituted plant leaf of the invention comprising the 'generating agent, and an air outlet intended to be introduced into the mouth of the user. The air inlet, the heating body, the location, and the air outlet are typically fluidly connected to each other.

Typically when using the heater, air is drawn by the user into the heater through the air inlet; the sucked air then passes through the heated part to obtain heated air; in contact with the reconstituted plant leaf of the invention comprising the generating agent maintained in the location, an aerosol is formed by the heated air and is then inhaled by the user. If the plant is a medicinal plant, then the aerosol formed has therapeutic properties.

In addition, thanks to the heating device, there is no combustion of the sheet. The user can therefore take advantage of the organoleptic properties of the plant, and possibly tobacco while very significantly reducing their exposure to harmful constituents.

Examples

Example 1: Tobacco leaf reconstituted with η = 1

1) Obtaining the reconstituted tobacco leaf

A fibrous support comprising tobacco fibers and having a basis weight of 62 g / m ² is impregnated with 7.5 g of tobacco extract. After impregnation the fibrous support weighs 9 g and has a grammage of 108 g / m ² . After impregnation, 1.4 g of tobacco dust is sprinkled on one side of the fibrous support. Then the impregnated and sprinkled sheet is dried at 95 ° C for 540 seconds.

2) Characterizations of the reconstituted tobacco leaf

The dry matter contents of the plant fibers, plant extract and plant dust in the reconstituted plant leaf are given in the table below.

Contents Plant fibers Plant extract Plant dust 31% 39% 30%

The reconstituted plant leaf is subjected to a Buroma cutting test.

The dust loss is 2.6%, which is very low.

The reconstituted tobacco leaf obtained is then cut into scaferlati to be smoked without combustion. The organoleptic properties of the aerosol thus generated are satisfactory for the user.

Example 2: Tobacco leaf reconstituted with n = 2

1) Obtaining the reconstituted tobacco leaf

Two sheets having a grammage of 32 g / m ² are obtained by passing plant fibers through a paper machine.

2.7 g of mint dust are then sprinkled on a wet side of one of the two leaves. The sprinkled sheet thus obtained is then dried.

The stacking of the second sheet and of the sprinkled and dried sheet is then carried out by adhesion of a wet face of the second sheet with the face of the sprinkled and dried sheet in contact with the plant dust to form a sandwich of leaves. in which the dust is trapped between the two sheets.

The leaf sandwich is then dried using a Rapid Kôthen type apparatus under the following conditions.

The dried leaf sandwich is then impregnated with 3.64 g of tobacco and glycerin extracts to obtain a sandwich of impregnated leaves.

The sandwich of impregnated sheets is then dried at 90 ° C for 540 seconds.

2) Characterizations of the reconstituted plant leaf

The dry matter contents of the plant fibers, plant extract and plant dust in the reconstituted plant leaf are given in the table below.

Contents Plant fibers Tobacco extracts + aerosol generating agent Dust extracts from mint 42% 46% 12%

The reconstituted plant leaf is subjected to the same Buroma cutting test as the reconstituted plant leaf of Example 1.

The loss of dust is 4.9%, which is very low.

The reconstituted plant leaf obtained is then cut into scaferlati to be smoked without combustion. The organoleptic properties of the aerosol thus generated are satisfactory for the user.

Claims (13)

1. Reconstructed plant leaf comprising: - 1 or 2 fibrous supports comprising plant fibers, - a plant extract, and - a solid additive. 2. reconstituted plant leaf according to claim 1, further comprising an aerosol generating agent, said aerosol generating agent representing from 8% to 50%, in particular from 10% to 40%, more particularly from 15% to 35% by dry weight of the reconstituted plant leaf. 3. reconstituted plant leaf according to claim 1 or claim 2, in which the aerosol generating agent is sorbitol, glycerin, propylene glycol, tri ethylene glycol, lactic acid, glyceryl diacetate, glyceryl triacetate, triethyl citrate or isopropyl myristate or a mixture of these. 4. reconstituted plant leaf according to any one of claims 1 to 3, in which the dry matter content by weight of plant fibers is from 20% to 92%, in particular from 25% to 75%, more particularly from 30% to 45%. 5. reconstituted plant leaf according to any one of claims 1 to 4, in which the dry matter content by weight of the plant extract included in the reconstituted plant leaf is from 5% to 47%, in particular of 25% to 45%. 6. reconstituted plant leaf according to any one of claims 1 to 5, in which the solid additive is chosen from plant dust, a diluent, a texturing agent, powdered or encapsulated flavors or a mixture of these. this. 7. reconstituted plant leaf according to any one of claims 1 to 6, in which the solid additive is plant dust and the content of plant dust is from 1% to 70% by dry weight relative to the total weight of the reconstituted plant leaf, in particular from 5% to 65%, very particularly from 10% to 30%. 8. reconstituted plant leaf according to any one of claims 1 to 7, in which the plant is chosen from spore plants, seed plants or a mixture of these, in particular, the plant is chosen from tobacco plant, food plants, aromatic plants, fragrant plants, medicinal plants or a mixture thereof, most particularly the plant is the tobacco plant. 9. A method of manufacturing a reconstituted plant leaf as defined in claims 1 to 8 and comprising 1 fibrous support, said method comprising the following steps: ai) supply of the fibrous support, bi) bringing the plant extract into contact with the fibrous support, and ci) bringing the solid additive into contact with the fibrous support, step bi) being able to be carried out at the same time as step ci), said method further comprising a step: si) drying after step ci) bringing the solid additive into contact with the fibrous support. 10. A method of manufacturing a reconstituted plant leaf as defined in claims 1 to 8 and comprising 2 fibrous supports, said method comprising the following steps: a2) supply of the 2 fibrous supports, b2) bringing the plant extract into contact with at least one of the 2 fibrous supports, C2) bringing the solid additive into contact with at least one of the 2 fibrous supports, and d2) stacking the 2 fibrous supports so that the solid additive is included between the 2 fibrous supports, step b2) can be carried out at the same time as step C2), said method further comprising a step: S2) drying after step d2) stacking the 2 fibrous supports. 11. The method of claim 9 or claim 10 wherein the or the 2 fibrous supports are obtained by passing plant fibers through a paper machine, in particular the or the 2 fibrous supports are obtained by a papermaking process. 12. Method according to any one of claims 9 to 11 in which the plant fibers and the plant extract are obtained according to the following steps: e) mixing one or more parts of the plant with water in order to extract the plant extract from the plant fibers, f) separation of the plant extract from the plant fibers. 13. Use of the reconstituted plant leaf as defined in claims 2 to 8 in a tobacco heating device without burning it.