CN113784632A

CN113784632A - High-density reconstituted plant sheet

Info

Publication number: CN113784632A
Application number: CN202080032213.6A
Authority: CN
Inventors: C·里古雷
Original assignee: Swamont Luxemburg
Current assignee: Swamont Luxemburg; SWM Luxembourg SARL
Priority date: 2019-05-07
Filing date: 2020-05-07
Publication date: 2021-12-10
Also published as: US20220273018A1; CA3135252A1; KR20220005578A; WO2020225388A1; AU2020267871A1; FR3095739A1; FR3095739B1; EP3965596A1; JP2022531918A

Abstract

The present invention relates to a reconstituted plant sheet suitable for use in a device for heating tobacco without burning the tobacco, the reconstituted plant sheet having a high density.

Description

High-density reconstituted plant sheet

Technical Field

The present disclosure relates to the field of devices for heating tobacco without burning the tobacco, the subject of which is a reconstituted plant sheet obtained by a high-density papermaking process.

Background

To avoid the formation of harmful constituents during the combustion of tobacco, a number of devices have been developed that heat the tobacco without burning it. For example, applications published under numbers WO 2016/026810 and WO2016/207407 describing such devices may be mentioned. In these devices, the tobacco is heated at a temperature below the combustion temperature without being combusted, which results in the formation of an aerosol. The aerosol generated during the heating of the tobacco replaces cigarette smoke and has favorable organoleptic properties when inhaled by the user. This therefore allows the user to inhale nicotine and tobacco aroma while very significantly reducing the chance of the user coming into contact with harmful ingredients.

In order for the user to use these heating devices, it is important that the experience obtained with the device is as close as possible to that obtained with a conventional cigarette, that is to say, corresponds to the nicotine content of a conventional cigarette and satisfactory organoleptic properties with each puff.

Conventional tobacco is not suitable for use in such devices because it does not allow the user to obtain a satisfactory experience, and in particular it does not allow easy generation of a sufficient amount of aerosol with advantageous organoleptic properties.

Reconstituted tobacco is more suitable for these heating devices because it can produce large amounts of aerosol with favorable organoleptic properties.

However, reconstituted tobacco must contain a minimum amount of aerosol generating agent to produce a satisfactory amount of aerosol. For example, the reconstituted tobacco disclosed in US 3145717 contains only 3% by weight aerosol former solids. The amount of aerosol generated by such reconstituted tobacco and the nicotine delivery rate of such reconstituted tobacco in a heating device are too low to be satisfactory.

It is therefore proposed to improve the sensory characteristics of the aerosol formed on each puff and further increase the nicotine delivery rate so that the experience obtained with the heating device more closely resembles that obtained with a conventional cigarette.

Disclosure of Invention

Thus, thanks to the inventors' discovery, these needs can be met by a reconstituted plant sheet comprising:

-a fibrous support comprising refined plant fibers,

an aerosol generating agent, and

-a plant extract, which is selected from the group consisting of,

it is characterized in that

The reconstituted plant sheet has a density of 0.6g/cm or more³And is and

the total solid content of the aerosol-generating agent is from 10% to 29%.

Advantageously, reconstituted plant sheets according to the invention have greater nicotine delivery rates than low density reconstituted plant sheets.

In addition, upon each puff, the reconstituted plant sheet according to the invention advantageously forms an aerosol, the organoleptic properties of which are improved compared to aerosols formed from low density reconstituted plant sheets.

A second subject of the invention is a method for producing a reconstituted plant sheet according to the invention, comprising the following steps:

a) the fibers are passed through a paper machine to form a fibrous support,

b) contacting the aerosol-generating agent and the plant extract with a fibrous support to obtain a wet reconstituted plant sheet, and

c) drying the wet reconstituted plant sheet.

A third subject of the invention is the use of a reconstituted plant sheet according to the invention in a heating device, in particular in a device for heating tobacco without burning it.

Detailed Description

According to a first subject, the invention relates to a reconstituted plant sheet comprising:

-a fibrous support comprising refined plant fibers,

an aerosol generating agent, and

-a plant extract, which is selected from the group consisting of,

wherein the reconstituted plant sheet has a density of 0.6g/cm or more³And is and

the total solid content of the aerosol-generating agent is from 10% to 29%.

Typically, the reconstituted plant sheet may have a density of 0.62g/cm³To 1.50g/cm³In particular 0.65g/cm³To 1g/cm³More particularly 0.66g/cm³To 0.70g/cm³。

Typically, the density of a reconstituted plant sheet is calculated by dividing its basis weight by its thickness.

To determine the basis weight of the plant sheet, the following method can be used:

0.25m was cut using a template (size: 57.5X 43.5cm) at a distance of about 15cm from the edge of the reconstituted plant sheet to be analyzed²The sample of (1). The sample was then folded in four and placed on a hot plate for drying on the hot plate to remove water but not the aerosol generating agent.

The dried samples were then weighed to determine the basis weight of the plant sheet.

To determine the thickness of the plant sheet, a method suitable for reconstructing the plant sheet described in standard NF EN ISO 534 (12 months 2011) can be used:

measuring the average thickness of the control parchment paper used to measure the thickness of the reconstituted plant sheet (at precisely located positions on the paper, one layer is measured at least 6 times),

-placing the reconstituted plant sheet sample between 2 plies of parchment paper,

once the probe of the micrometer is in position, there is a waiting time of 30 seconds before the measurement is made (stabilizing the sample for thickness measurement),

-making at least 6 measurements of the precisely located position on the parchment paper,

the calculated thickness of the reconstituted plant sheet is the average of the measured total thicknesses (reconstituted plant sheet +2 parchment papers) minus 2 times the average thickness of the parchment papers.

Typically, reconstituted plant sheets may have 60g/m²To 300g/m²In particular 80g/m²To 250g/m²Most particularly 90g/m²To 200g/m²Even more particularly 140g/m²To 190g/m²Basis weight of (c).

Typically, the reconstituted plant sheet may have a thickness of 100 μm to 450 μm, particularly 120 μm to 375 μm, most particularly 140 μm to 325 μm.

According to a particular embodiment, the reconstituted plant sheet may have a density of 0.65g/cm³To 1g/cm³Density of 90g/m²To 200g/m²And a thickness of 140 μm to 325 μm.

One skilled in the art will know how to adjust the basis weight and thickness of the reconstituted plant sheet to achieve the desired high density.

For the purposes of this application, the term "fibrous support" means a base web comprising refined plant fibers, the base web typically being obtained by a papermaking process.

For the purposes of the present application, the term "refined plant fiber" refers to plant fibers that have been subjected to a refining step that can effect fibrillation and/or cutting of the plant fibers. The refining step is typically performed in a papermaking process (e.g., a papermaking process that produces reconstituted papermaking tobacco). On the other hand, the refining step is not carried out in the process for producing cast leaf reconstituted tobacco (such as the processes disclosed in EP 0565360 and WO 2012/164009).

For example, the plant refined fiber may have a Schopper-Riegler (Schopper-Riegler) degree (° SR) from 15 ° SR to 75 ° SR, particularly from 20 ° SR to 65 ° SR, more particularly from 25 ° SR to 55 ° SR.

Typically, the fibrous support may comprise refined fibres of one or several plants.

For the purposes of this application, the term "aerosol generating agent" denotes a compound which, when heated (e.g. when in contact with hot air), allows an aerosol to be formed.

Let S_AGIs the total solid weight content of the aerosol generating agent included in the reconstituted plant sheet of the invention. Typically, S_AGIt may be from 14% to 27%, more particularly from 16% to 25%.

With S greater than the above range_AGThe aerosol generated by the reconstituted plant sheet can cause unwanted burning of the mouth and/or throat (a phenomenon known as "hot aspiration").

Typically, the aerosol generating agent may be a polyol, a non-polyol or a mixture thereof. Typically, the polyol forming agent may be sorbitol, glycerol, propylene glycol, triethylene glycol or a mixture thereof. Typically, the non-polyol forming agent may be lactic acid, diacetin, triacetin, triethyl citrate, isopropyl myristate or a mixture thereof.

According to one embodiment, the aerosol generating agent is glycerol, propylene glycol or a mixture of glycerol and propylene glycol, preferably glycerol.

Aerosols are generated during heating of the reconstituted plant sheet of the invention. Advantageously, the plant extract comprising the aromatic compound imparts an aroma from the plant to the aerosol. By simply changing the reconstituted plant sheet, the user can easily change the aroma of the aerosol produced by heating the reconstituted plant sheet.

For the purposes of the present application, the term "plant extract" denotes all water-soluble products of plants. Advantageously, the plant extract comprises nicotine and a compound imparting organoleptic and/or therapeutic properties to the aerosol.

The sensory and therapeutic properties of the aerosol formed by heating the reconstituted plant sheet may depend on the solid weight content of the plant extract included in the reconstituted plant sheet of the invention.

The total solid content of the plant extract depends on the plant used and, more specifically, on the content of aromatic compounds or compounds with therapeutic properties of the plant used.

Let S_PIs the total solid weight content of the plant extract included in the reconstituted plant sheet of the invention. Typically, S_PIt may be 20% to 45%, particularly 25% to 40%, more particularly 27% to 36%.

To determine S_PThe following methods may be used:

the reconstituted plant sheet to be analyzed is ground to reach a particle size of less than or equal to 1 mm. The reconstituted plant sheet was then mixed with boiling water for 45 minutes to extract all plant extracts. Calculating S by the difference between the dry weight of the reconstituted plant sheet sample to be analyzed and the dry weight of the fiber residue after extraction_P。

According to one embodiment, the sum S of the total solid content of the plant extract and the total solid content of the aerosol-generating agent_P+S_AGIt may be from 40% to 70%, particularly from 45% to 65%, more particularly from 50% to 60%.

According to one embodiment, the total weight of solids of the plant extractThe ratio S between the content and the total solid content of the aerosol-generating agent_P/S_AGFrom 1.0 to 2.0, in particular from 1.10 to 1.80, more in particular from 1.15 to 1.70.

Advantageously, when the reconstituted plant sheet according to the invention has an S within the above-mentioned range_P/S_AGAt ratios, nicotine delivery rate is improved and the sensory characteristics of the resulting aerosol are even more desirable.

According to a particular embodiment, the reconstituted plant sheet may have an S of 16% to 25%_AG27% to 35% S_PAnd 50% to 60% of S_P+S_AG。

According to a particular embodiment, the reconstituted plant sheet may have a density of 0.65g/cm³To 1g/cm³Density of 90g/m²To 200g/m²Basis weight of 140 to 325 μm thickness, S of 16 to 25%_AG27% to 35% S_PAnd 50% to 60% of S_P+S_AG。

The plant fiber and plant extract may be independently obtained from a plant selected from the group consisting of a spore-forming plant, a seed-forming plant, or a mixture thereof. Specifically, the plant may be a plant selected from tobacco plants, food plants, aromatic plants, spice plants, medicinal plants, cannabiaceae (Cannabaceae) plants, or a mixture thereof.

According to a particular embodiment, the plant is a tobacco plant.

If the plant is a medicinal plant, the aerosol produced by heating the reconstituted plant sheet can also have therapeutic properties, such that the reconstituted plant sheet can be used for therapeutic treatment.

Advantageously, the plant extracts obtained from the plant mixture make it possible to provide a wide range of organoleptic and/or therapeutic properties. The botanical blends may also be such that the unpleasant organoleptic properties of one plant in the blend (e.g., a medicinal plant) are offset by the pleasant organoleptic properties of another plant in the blend (e.g., a tobacco plant, an aromatic plant, or a spice plant).

Typically, the plant fiber may be obtained from a first plant and the plant extract may be obtained from a second plant. In fact, this is because the fibres of a plant may not have the mechanical properties that allow the formation of a fibrous support, but the extract of the plant may impart the desired organoleptic and/or therapeutic properties to the aerosol. In contrast, the fibers of a plant may have mechanical properties that allow the formation of a fibrous support, but the extract of the plant may not impart the desired organoleptic and/or therapeutic properties to the aerosol.

Advantageously, the plants are mixed to obtain plant fibers, so that the mechanical properties and/or the organoleptic or chemical properties of the reconstituted plant sheet can be adjusted.

When the plant is a tobacco plant, then the tobacco fiber and tobacco extract can be obtained from any tobacco plant or tobacco type of plant, such as virginia tobacco, burley tobacco, cured tobacco, dark cured tobacco, oriental tobacco, sun cured tobacco, fire cured tobacco, or mixtures thereof.

Typically, the edible plant is garlic, coffee, ginger, licorice, rooibos (rooibos), stevia, tea, cacao, chamomile, yerba mate, anise, fennel, citronella.

Typically, the aromatic plant is basil, turmeric, clove, bay, oregano, mint, rosemary, sage, thyme.

Typically, the spice plants are lavender, rose, eucalyptus.

Typically, the medicinal plant is a plant described in the document "list of traditional medicinal plants a" (french pharmacopoeia, 2016 (1 month), published by the national drug safety Agency (ANSM) [ french national drug and health care products safety agency ]) or a plant known to contain a compound with therapeutic properties. Typically, the listed medicinal plants are ginkgo, ginseng, tart cherry, peppermint, willow and sargentgloryvine.

Typically, eucalyptus is one of the medicinal plants known to contain compounds with therapeutic properties.

Typically, the plant fibers and plant extracts of the reconstituted plant sheet of the invention can be derived from various plant parts that are either part of the plant itself or the result of processing of various plant parts. Typically, the plant part may be an entire part of the plant or debris derived from threshing or mixing and shredding the plant part.

Typically, the plant parts may be selected from the plant parts most rich in aroma compounds that impart the sensory characteristics of the aerosol. Typically, these parts may be whole plants, parts of plants above ground (such as flower buds, shoot barks, stem barks, leaves, flowers, fruits and their pedicles, seeds, petals, flower heads), or parts below ground (such as bulbs, roots, root barks, rhizomes or mixtures thereof). The plant parts may also be the result of mechanical, chemical or mechanochemical treatment of one or more plant parts, for example, the shell protecting the cocoa beans produced during the peeling of the cocoa beans.

Typically, tobacco plant parts are probably the most abundant part of the aroma compounds that impart their organoleptic properties to aerosols. Typically, the tobacco plant part may be the parenchyma (leaf) of the tobacco plant, optionally with an additional stem. Typically, the tobacco plant part may be the leaves of a tobacco plant or pieces from threshing or mixing and comminuting the leaves and veins of a tobacco plant into scaverlati.

In the edible plant, for example, garlic rhizome, coffee cherry, anise fruit, ginger rhizome, licorice root and leaf of loezo silk, leaf of stevia or leaf of tea may be selected as the part.

In the aromatic plants, for example, clove buds (cloves), basil, bay and sage leaves, mint, oregano, rosemary and thyme leaves and flower heads, or turmeric rhizome may be selected as part.

Typically, in the spice plant, lavender flowers and flower heads, or rose buds and petals, may be selected.

Among the medicinal plants listed in the french pharmacopoeia, it is possible to select, for example, ginkgo leaves, the underground parts of ginseng, the peduncle of sour cherry fruit (cherry stem), the leaves and flower heads of peppermint, the bark and leaves of willow or the leaves of sargentgloryvine.

According to a particular embodiment, the reconstituted plant sheet may have a density of 0.65g/cm³To 1g/cm³Density of 90g/m²To 200g/m²A thickness of 140 to 325 μm, S of 16 to 25%_AG27% to 35% of S_PAnd 50% to 60% of S_P+S_AGAnd the plant is a tobacco plant.

Typically, the solids weight content of the refined plant fiber included in the reconstituted plant sheet may be from 15% to 70%, particularly from 30% to 61%, more particularly from 40% to 57%.

Typically, the fibrous support of the reconstituted plant sheet may also comprise cellulose-based plant fibers.

Cellulose-based plant fibers are fibers obtained by chemical, mechanical or thermomechanical cooking processes, such as wood pulp, hemp (hemp) or annual plants (e.g. flax). Mixtures of these cellulose-based plant fibers may also be used.

Advantageously, these cellulose-based plant fibers can improve the mechanical strength properties of the reconstituted plant sheet.

Typically, the cellulose-based plant fibers may comprise from 0.5% to 20%, particularly from 3% to 17.5%, more particularly from 5% to 15% by weight of the reconstituted plant sheet solids.

According to a second subject, the invention relates to a method for producing a reconstituted plant sheet as described above, comprising the following steps:

a) the refined plant fibers are passed through a paper machine to form a fibrous support,

c) drying the wet reconstituted plant sheet.

According to the invention, a fibrous support is produced using a papermaking process. According to a preferred embodiment of the present invention, the reconstituted plant sheet according to the present invention is a reconstituted plant sheet obtainable by a papermaking process.

Typically, the fibrous support constituted in step a) may have a density of 25g/m²To 150g/m²Basis weight of (c); in particular, the minimum value of the basis weight may be 55g/m²、60g/m²、65g/m²、70g/m²、75g/m²。

Advantageously, a fibrous support whose basis weight is comprised in the above-mentioned range enables a desired high density to be obtained.

Typically, the fibrous support constituted in step a) may have a thickness of from 70 μm to 430 μm, in particular from 100 μm to 350 μm, most in particular from 120 μm to 300 μm.

The basis weight and thickness of the fibrous support is typically measured by the same methods as the basis weight and thickness of the reconstituted plant sheet described above.

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

d) mixing one or more plant parts with a solvent to extract a plant extract from the plant fiber,

e) separating the fabric extract from the plant fiber.

Thus, plant extracts and plant fibers are typically obtained by a separation process. In step d), one or more plant parts are mixed with a solvent (e.g. in a digester) in order to extract the plant extract from the plant fibres. In step e), the plant extract is separated from the plant fibres, for example by means of a screw press, in order to separate and obtain the plant fibres on the one hand and the plant extract on the other hand.

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

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

The person skilled in the art will know how to adapt the temperature of the solvent in step d) to the plant, the plant part and the plant part to be treated. Typically, the solvent temperature during treatment of the roots or bark will be higher than during treatment of the leaves or petals.

Typically, the temperature of the solvent in step d) may be from 10 ℃ to 100 ℃, particularly from 30 ℃ to 90 ℃, more particularly from 50 ℃ to 80 ℃.

According to embodiments where the solvent is water and the plant is tobacco, the temperature of the water may typically be from 30 ℃ to 80 ℃. Typically, for the treatment of the stems of tobacco plants, the temperature of the water may be from 50 ℃ to 80 ℃. Typically, for the treatment of parenchyma of tobacco plants, the temperature of the water may be from 30 ℃ to 70 ℃.

Typically, the plant fibers may be refined in a refiner and then passed through a paper machine to constitute a fiber support.

Typically, the refined plant fiber may be derived from various plants.

According to the above separation process, the fiber of each plant can be obtained separately. They can then be mixed so that the fiber mixture from the various plants passes through a paper machine to constitute a fiber support. Fibers can also be obtained from various plants together by bringing together one or more parts of the various plants and then subjecting them to the above-described separation process. The temperature of the water will then be adapted to the plant to be treated, in particular the plant requiring the highest water temperature, in order to extract the extract of this plant. This alternative embodiment is very advantageous because it makes it possible to obtain fibres of various plants without having to carry out a plurality of separation processes in parallel.

Typically, the plant extract may be an extract of various plants.

According to the above separation process, extracts of various plants can be obtained by mixing extracts of various plants obtained separately. Extracts of various plants can also be obtained by bringing together one or more parts of the various plants and then subjecting them to the above-described separation process. The temperature of the water will then be adapted to the plant to be treated, especially the plant requiring the highest water temperature, to extract the water soluble plant extract. This alternative embodiment is very advantageous because it makes it possible to obtain extracts of various plants without having to carry out several processes in parallel. In both cases, extracts of various plants are contacted with the fibrous support in step b).

Typically, the various plant extracts obtained according to the above separation process may also be contacted separately with the fibrous support in step b).

Typically, in step b), the plant extract may be concentrated prior to contacting with the fibrous support. Vacuum evaporation device can be used for concentrating plant extract.

Typically, in step b), the plant extract and the aerosol-generating agent may be contacted with the fibrous support one after the other, or may be mixed so as to be contacted with the fibrous support together.

Typically, the step b) of contacting the plant extract may be performed by dipping or spraying, in particular by dipping. Typically, the impregnation can be carried out by a size press.

For example, in order to obtain the desired high density, the line pressure applied by the size press may be reduced in step b). Typically, this line pressure in step b) is much lower than the line pressure applied by the size press used in conventional papermaking processes for producing reconstituted plant sheets, as described in applications FR 1559081 and FR 1757991.

In order to obtain the desired high density, it is suggested to also adapt the total amount of plant extract and aerosol-generating agent used in step b) to the basis weight of the fibrous support.

In contrast to conventional papermaking processes for producing reconstituted plant sheets, conventional papermaking processes produce reconstituted plant sheets having less than 0.6g/cm³Without wishing to be bound by any theory, the inventors believe that by allowing the plant extract and aerosol generating agent to be impregnated into the fibrous support, step b) of the process of the invention can achieve the desired high density. This specific impregnation makes it possible to obtain a uniform distribution of the plant extract and aerosol generating agent in the fibrous support and to increase the nicotine delivery rate.

Typically, the skilled person will know how to adjust the operating conditions under which the drying step c) is carried out.

Typically, the drying of step c) may be carried out by hot air drying in an infrared ramp (infra ramp), U.S. battery drying drums, tunnel dryers, vertical dryers, fluid bed dryers, pneumatic dryers (especially tunnel dryers).

The reconstituted plant sheet of the invention may then be cut into pieces, leaf like tobacco strips or rolled into rolls. To form a mixture of sheets, a plurality of sheets may be assembled.

The reconstituted plant sheet of the invention can be used in a device for heating tobacco without burning the tobacco.

Thus, according to a third subject, the invention relates to the use of a reconstituted plant sheet as described above in a heating device, in particular in a device for heating tobacco without burning the tobacco.

For the purposes of the present invention, the term "device for heating tobacco without burning it" means any device which allows the formation of an aerosol intended to be inhaled by the consumer. The aerosol replaces the smoke, allowing the user to inhale the plant scent while greatly reducing their chances of exposure to harmful ingredients.

Typically, the heating means comprises an air inlet in the direction of the air flow, a heating body, a receptacle for placing and holding the reconstituted plant sheet of the invention containing the generating agent, and an air outlet for introduction into the mouth of the user. The gas inlet, the heating body, the receiving and the gas outlet are typically at least in fluid connection with each other.

Typically, when using the heating device, the user draws air into the heating device through the air inlet; then the sucked air passes through a heating part to obtain heated air; upon contact with the reconstituted plant sheet of the invention containing the generating agent and held in a housing, an aerosol is formed by heating air and then inhaled by the user. If the plant is a medicinal plant, the aerosol formed has therapeutic properties.

Furthermore, by the heating means, the sheet does not burn. Thus, the user can take advantage of the organoleptic properties of the botanical and optionally tobacco, while very significantly reducing their exposure to harmful ingredients.

Examples

Reconstituted tobacco sheet 1 according to the invention

The mixture of virginia-type tobacco pieces and stems was contacted with water at 65 c and stirred for 45 minutes. The tobacco extract is separated from the fibrous portion by mechanical pressing. The tobacco extract was concentrated under vacuum to a solids concentration of 54%. Glycerin is added to the concentrated tobacco extract as an aerosol generating agent.

Tobacco fibers were refined to a Shore-Ruegler scale of 55 ° SR and then transported to a laboratory paper machine to make a tobacco product having a consistency of about 77g/m²A fibrous support of basis weight of (a).

Reconstituted tobacco sheet was prepared by contacting the concentrated tobacco extract containing glycerin with a fibrous support by impregnation in a size press, so as to obtain 27.3% S in the prepared reconstituted tobacco sheet_P23.7% of S_AGAnd a sum S of 51%_AG+S_P。

The sheet had a thickness of 0.68g/cm³Density of 145g/m²And a thickness of 212 μm.

Reconstituted tobacco sheet 2 according to the invention

Another reconstituted tobacco sheet is produced according to the above method, except that: a blend of Virginia-type tobacco rods and stalks is used, with a Shore-Ruigler Degrees of 25 ° SR, and a fibrous support having a basis weight of about 78g/m²，S_AG20.7% of S_P30.8%, total S_AG+S_PEqual to 51.5%.

The sheet had a thickness of 0.69g/cm³Density of 156g/m²And a thickness of 226 μm.

Reconstituted tobacco sheet 3 according to the invention

Another reconstituted tobacco sheet is produced according to the above method, except that: a blend of Virginia-type tobacco rods and stalks is used, with a Shore-Ruigler Degrees of 25 ° SR, and a fibrous support having a basis weight of about 63g/m²，S_AG21.1% of S_P35.4%, total S_AG+S_PEqual to 56.5%.

The sheet had a thickness of 0.61g/cm³Density of 129g/m²And a thickness of 186 μm.

Reconstituted tobacco sheet not conforming to the invention

Reconstituted tobacco sheets not in accordance with the invention were produced according to a procedure similar to that described above, except that the fibrous support had a basis weight of 57g/m²，S_P34.1% of S_AG14.9% and a total of S_AG+S_PThe lower limit value was 43%.

The reconstituted tobacco sheet has a density of less than 0.6g/cm³Density of 95g/m²And a thickness of 166 μm.

Nicotine delivery rate

Nicotine delivery Rate through glo for reconstituted tobacco sheet 1 according to the invention and reconstituted tobacco sheets not in accordance with the invention^TMThe heating system was determined according to the following protocol.

Calculating a nicotine delivery rate in a reconstituted tobacco sheet by dividing the nicotine content in the aerosol produced by heating the reconstituted tobacco sheet by the nicotine content in the reconstituted tobacco sheet.

The nicotine content in the aerosol generated by heating the reconstituted tobacco sheet was determined by:

purchased in Italy from 8 months in 2018 for glo^TMThe commercial Dunhill tube of (1) was filled with test sheet scaverlati (tobacco shred), tobacco weight was 260 mg/root, traction resistance was 70+/-3mm water column,

the aerosol is generated by a Borgwaldt RM04 smoking machine on which a filler rod has been mounted (by applying glo)^TMThe usage program provided by the heating system),

the material of the aerosol was collected on a 40mm cambridge filter. Then dissolved in methanol and the nicotine content of the aerosol was determined after separation by gas chromatography and determination by FID against n-heptadecane (used as standard). The nicotine content in the aerosol was measured according to standard ISO10315:2013 using methanol instead of isopropanol as mentioned in the standard. The chromatographic material used was the same as that used for the analysis of nicotine from the tested sheet. 6 replicates were performed to determine the nicotine content of the aerosol.

The method for measuring the nicotine content in the reconstituted tobacco sheet comprises the following steps:

the nicotine content in the tested sheet was determined by gas chromatography FID detection analysis using an Innowax gas chromatography column (column size: length 30 m; inner diameter: 0.53 mm; film thickness 1 μm).

The results of the measured sheets are shown below [ Table 1 ].

These results show that the reconstituted tobacco sheet 1 according to the invention has a significantly higher nicotine delivery rate than tobacco having less than 0.6g/cm³The density of (a) of tobacco sheet material.

[ Table 1]

Reconstituted tobacco sheet 1 according to the invention	38％
		Reconstituted tobacco sheet not conforming to the invention	<30％

Organoleptic properties

Tobacco sheets according to the invention and non-according to the invention were cut into scferlaci (cut tobacco) and then subjected to glo by an independent expert^TMThe heating system is used for sequentially smoking.

According to the independent expert, all the aerosols formed during smoking of the tobacco sheet according to the invention have very satisfactory organoleptic properties, in particular the aerosols are not very bitter, not very irritating, less aggressive, and have a good smoke circle (round) and a balanced taste, which is superior to the aerosols formed during smoking of tobacco sheets not according to the invention.

Claims

1. A reconstituted plant sheet comprising:

-a fibrous support comprising refined plant fibers,

an aerosol generating agent, and

-a plant extract, which is selected from the group consisting of,

it is characterized in that

The reconstituted plant sheet has a density of greater than or equal to 0.6g/cm³The total solid content of the aerosol generating agent is 10 to 29 percent.

2. The reconstituted plant sheet of claim 1, having a density of 0.62g/cm³To 1.50g/cm³。

3. The reconstituted plant sheet of claim 1 or 2, wherein the plant is a tobacco plant.

4. The reconstituted plant sheet according to any one of claims 1 to 3, wherein the total solid content of said plant extract is from 20% to 45%.

5. The reconstituted plant sheet according to any one of claims 1 to 4, wherein the sum of the total solid content of the plant extract and the total solid content of the aerosol-generating agent is from 40% to 70%.

6. The reconstituted plant sheet according to any one of claims 1 to 5, having a thickness of 100 to 450 μm.

7. The reconstituted plant sheet according to any one of claims 1 to 6, having a basis weight of 60g/m²To 300g/m²。

8. The reconstituted plant sheet according to any one of claims 1 to 7, wherein said aerosol generating agent is sorbitol, glycerol, propylene glycol, triethylene glycol, lactic acid, diacetin, triacetin, triethyl citrate, isopropyl myristate or a mixture thereof.

9. Method for producing a reconstituted plant sheet according to any one of claims 1 to 8, comprising the steps of:

b) contacting an aerosol generating agent and a plant extract with the fibrous support to obtain a wet reconstituted plant sheet, and

c) drying the wet reconstituted plant sheet.

10. Use of the reconstituted plant sheet of any one of claims 1 to 8 in a heating device.