JP2022531918A - High density reconstructed plant sheet - Google Patents

Abstract

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

Description

[0001] The present disclosure relates to the field of equipment for heating tobacco without burning, the subject of which is a reconstituted plant sheet obtained by a high density papermaking process.

[0002] In order to avoid the formation of harmful components during the burning of tobacco, a number of devices have been developed for heating the tobacco without burning it. For example, reference can be made to the applications published under the numbers WO2016 / 026810 and WO2016 / 207407 that describe such devices. In these devices, aerosols are formed as a result of heating the cigarette at a temperature below the combustion temperature without burning it. Aerosols produced during the heating of cigarettes replace cigarette smoke and have favorable sensory properties when inhaled by smokers. This allows the smoker to inhale the scent of nicotine and tobacco, but at the same time can significantly reduce the smoker's exposure to harmful components.

[0003] In order for smokers to adopt (choose) these heating devices, it is important that the experience gained with the device is as close as possible to the experience gained with conventional cigarettes. That is, each puff is required to have the same amount of nicotine and satisfactory sensory properties as conventional cigarettes.

[0004] Traditional cigarettes are not suitable for such devices because smokers do not have a satisfactory experience and cannot easily produce sufficient amounts of aerosols with particularly favorable sensory properties.
[0005] Reconstructed tobacco is more suitable for these heating devices because it can produce large amounts of aerosols with favorable sensory properties.

[0006] However, the reconstituted tobacco needs to contain a minimal amount of aerosol-producing agent in order to produce a satisfactory amount of aerosol. For example, the reconstituted tobacco disclosed in US Pat. No. 3,145,717 contains only 3% by weight of aerosol-producing agent solids. Neither the amount of aerosol produced by this reconstituted tobacco nor the rate of nicotine transfer of this reconstructed tobacco in the heating device is satisfactory.

[0007] Therefore, it is possible to improve the sensory properties of the aerosol formed in each puff and further increase the nicotine transfer rate so that the experience obtained with the heating device is closer to the experience obtained with conventional cigarettes. Recommended.

International Patent Application Publication No. 2016/026810 International Patent Application Publication No. 2016/207407 US Pat. No. 3,145,717

[0008] Thus, it is thanks to the inventors that the reconstructed plant sheet can meet these needs. The reconstructed plant sheet is
-Fibrous support containing micronized plant fibers,
-Contains aerosol-producing agent and-plant extract, the density of the reconstituted plant sheet is greater than or equal to 0.6 g / cm ³ , and the total solid content (by weight) of the aerosol-producing agent is 10%. It is characterized by being ~ 29%.

[0009] Conveniently, the reconstituted plant sheet according to the invention has a higher nicotine transfer rate than the low density reconstructed plant sheet.
[0010] Further, the reconstituted plant sheet according to the present invention conveniently forms an aerosol at each puff, the functional properties of which are improved as compared to the aerosol formed by the low density reconstructed plant sheet.

[0011] A second subject of the present invention is a method for producing a reconstructed plant sheet according to the present invention, wherein the following steps: that is, a) a step of passing fibers through a paper machine to construct a fibrous support.
b) comprises contacting the aerosol-producing agent with the plant extract with the fibrous support to obtain a wet reconstituted plant sheet, and c) drying the wet reconstituted plant sheet.

[0012] A third subject of the present invention is the use of the reconstructed plant sheet according to the present invention in a heating device, particularly a device for heating tobacco without burning.

[0013] According to the first subject, the present invention is:
-For fibrous supports containing micronized plant fibers-aerosol producers and-for reconstituted plant sheets containing plant extracts, the density of the reconstructed plant sheets is greater than or equal to 0.6 g / cm ³ and aerosols. The total solid content (depending on weight) of the product is 10% to 29%.
[0014] Typically, the density of the reconstituted plant sheet is 0.62 g / cm ³ to 1.50 g / cm ³ , particularly 0.65 g / cm ³ to 1 g / cm ³ , more specifically 0.66 g /. It can be cm ³ to 0.70 g / cm ³ .

[0015] Typically, the density of a reconstructed plant sheet is calculated by dividing its basis weight by its thickness.
[0016] The following methods can be used to determine the basis weight of the plant sheet.
A 0.25 m ² sample is cut out using a template (dimensions: 57.5 x 43.5 cm) approximately 15 cm from the edge of the reconstituted plant sheet to be analyzed. The sample is then folded in four and placed on a hot plate and dried on it to remove moisture without removing the aerosol generator.

Next, the dry sample is weighed to determine the basis weight of the plant sheet.
[0017] To determine the thickness of the plant sheet, the method described in Standard NF EN ISO 534 (December 2011) suitable for the reconstituted plant sheet can be used.

-Measure the average thickness of the reference parchment paper used to measure the thickness of the reconstructed plant sheet (measured at least 6 times at the exact location on a sheet of paper).
-Put a sample of the reconstructed plant sheet between two layers of parchment paper.
-As soon as the micrometer probe is in place, allow 30 seconds of waiting time before making the measurement (sample stabilization for thickness measurement).
-Make at least 6 measurements at the exact location on the sulphate.
-The calculated thickness of the reconstructed plant sheet is the average of the measured total thickness (reconstructed plant sheet + 2 sheets of parchment paper) minus twice the average thickness of the parchment paper.

[0018] Typically, the reconstituted plant sheet is 60 g / m ^2-300 g / m ² , particularly 80 g / m 2-250 g / m ² , most specifically 90 g / m ^2-200 g / ^{m 2 ,} More specifically, it may have a basis weight of 140 g / m ² to 190 g / m ² .

[0019] Typically, the reconstituted plant sheet can have a thickness of 100 μm to 450 μm, particularly 120 μm to 375 μm, most specifically 140 μm to 325 μm.
[0020] According to one particular embodiment, the reconstituted plant sheet has a density of 0.65 g / cm ^{3-1 g / cm 3 ,} a basis weight of 90 g / ^{m 2-200 g / m 2 ,} and 140 μm-325 μm. Can have thickness.

Those skilled in the art will know how to adjust the basis weight and thickness of the reconstructed plant sheet to achieve the desired high density.
[0022] For the purposes of the present application, the term "fibrous support" refers to a base web containing plant microfibers, which base web is typically obtained by papermaking.

[0023] For the purposes of the present application, the term "plant fine fiber" refers to a plant fiber that has undergone a refining step that allows for fibrillation and / or cutting of the plant fiber. .. The miniaturization step is conventionally carried out by a papermaking method such as manufacturing reconstituted papermaking tobacco. On the other hand, the miniaturization step is not carried out in the method for producing cast leaf reconstituted tobacco as disclosed in EP 0 565 360 and WO 2012/164009.

[0024] For example, plant microfibers have a shopper leaguer degree (° SR) of 15 ° SR to 75 ° SR, particularly 20 ° SR to 65 ° SR, and more specifically 25 ° SR to 55 ° SR. Can have.

[0025] Typically, the fibrous support may include microfibers of one type of the same plant or several types of plants.
[0026] For the purposes of the present application, the term "aerosol-producing agent" refers to a compound that allows the formation of an aerosol when heated, eg, in contact with hot air.

[0027] The total solid content (depending on the weight) of the aerosol-producing agent contained in the reconstituted plant sheet of the present invention is defined as _SAG . Typically, _SAG can be 14% to 27%, more specifically 16% to 25%.

[0028] Aerosols produced from reconstituted plant sheets with _SAG greater than the above range cause unwanted burning of the oral cavity and / or throat (a phenomenon known as "hot puff").

[0029] Typically, the aerosol-producing agent can be a polyol, a non-polyol, or a mixture thereof. Typically, the producting agent, which is a polyol, can be sorbitol, glycerol, propylene glycol, triethylene glycol, or a mixture thereof. Typically, the non-polyol product can be lactic acid, glyceryl diacetate, glyceryl triacetate, triethyl citrate, isopropyl myristate, or a mixture thereof.

[0030] According to one embodiment, the aerosol generator is glycerol, propylene glycol, or a mixture of glycerol and propylene glycol, with glycerol being preferred.
[0031] Aerosols are produced during heating of the reconstituted plant sheets of the present invention. Conveniently, plant extracts containing aromatic compounds add aroma to this aerosol from the plant. By simply replacing the reconstituted plant sheet, the smoker can easily change the aroma of the aerosol produced by heating the reconstructed plant sheet.

[0032] For the purposes of the present application, the term "plant extract" refers to any water-soluble product of a plant. Conveniently, the plant extract contains nicotine and a compound that imparts sensory and / or therapeutic properties to the aerosol.

[0033] The sensory and therapeutic properties of the aerosol formed by heating the reconstituted plant sheet may depend on the solid content content (depending on weight) of the plant extract contained in the reconstructed plant sheet of the present invention.

[0034] The total solid content (by weight) of a plant extract depends on the content of the aromatic compound or the content of the compound having therapeutic properties of the plant used, more particularly the plant used.
[ ₀₀₃₅ ] The total content (by weight) of the solid content of the plant extract contained in the reconstructed plant sheet of the present invention is defined as SP. Typically, _SP can be 20% to 45%, particularly 25% to 40%, and more specifically 27% to 36%.

[ ₀₀₃₆ ] The following methods can be used to determine SP.
The reconstituted plant sheet to be analyzed is crushed to a particle size of 1 mm or less. The reconstituted plant sheet is then mixed with boiling water for 45 minutes to extract all plant extracts. _SP is calculated from the difference between the dry weight of the sample of the reconstituted plant sheet being analyzed and the dry weight of the fibrous residue after extraction.

[0037] According to one embodiment, the total solid content (by weight) of the plant extract and the total solid content (by weight) of the aerosol-producing agent, SP ₊ S _AG , is 40% to 70. %, Especially 45% to 65%, and more specifically 50% to 60%.

[0038] According to one embodiment, the ratio between the total solid content (by weight) of the plant extract to the total solid content (by weight) of the aerosol-producing agent, SP / _{S AG} , is: It is 1.0 to 2.0, particularly 1.10 to 1.80, and more specifically 1.15 to 1.70.

[0039] Conveniently, when the reconstituted plant sheet according to the invention has an SP / _{S AG} ratio within the above range, the nicotine transfer rate is improved and the sensory properties of the aerosol formed are even more satisfactory. Will be.

[0040] According to one particular embodiment, the reconstituted plant sheet has 16% -25% _{S AG} , 27% -25% SP, and 50% -60% _{SP +} S _AG . sell.
[0041] According to one particular embodiment, the reconstituted plant sheet has a density of 0.65 g / cm ³ to 1 g / cm ³ , a basis weight of 90 g / m ² to 200 g / m ² , and 140 μm to 325 μm. It may have a thickness of 16% to 25% _SAG , 27% to 35% SP, and 50% to 60% _{SP + SAG} .

[0042] Plant fibers and plant extracts can be obtained independently of plants selected from spore-producing plants, seed-producing plants or mixtures thereof. In particular, the plant can be a plant selected from tobacco plants, edible plants, aromatic plants, fragrant plants, medicinal plants, family Cannabaceae, or mixtures thereof. ..

[0043] According to one particular embodiment, the plant is a tobacco plant.
[0044] If the plant is a medicinal plant, the reconstituted commercial sheet can also be used therapeutically, as the aerosol produced by heating the reconstituted plant sheet also has therapeutic properties.

[0045] Conveniently, the plant extract obtained from the plant mixture makes it possible to provide a wide range of panel sensory and / or therapeutic properties. The plant mixture also allows the unpleasant sensory properties of one plant of the mixture, eg medicinal plants, to be softened with the pleasing sensory properties of another plant of the mixture, eg tobacco plants, aromatic plants or fragrant plants. ..

[0046] Typically, plant fibers may be obtained from the first plant and plant extracts may be obtained from the second plant. In fact, even if the fibers of a plant do not have the mechanical properties that allow the formation of fibrous supports, the extract of this plant may be able to impart the desired sensory and / or therapeutic properties to the aerosol. be. Conversely, even though the fibers of a plant have mechanical properties that allow the formation of fibrous supports, the extract of this plant may not be able to impart the desired sensory and / or therapeutic properties to the aerosol. be.

[0047] Conveniently, mixing plants to obtain plant fibers makes it possible to adjust the mechanical and / or sensory or chemical properties of the reconstituted plant sheet.
[0048] If the plant is a tobacco plant, the tobacco fiber and tobacco extract can be any tobacco plant or tobacco type plant, such as Virginia tobacco, Burley tobacco, air-dried tobacco (air-). Obtained from cured tobacco, dark air-cured tobacco, Orient tobacco, sun-cured tobacco, fire-cured tobacco, or a mixture thereof. Can be done.

[0049] Typically, the edible plants are garlic, coffee, ginger, licorice, rooibos, Stevia rebaudiana, tea, cacao tree, chamomile, mate, star anise, fennel, citronella.

[0050] Typically, aromatic plants are basil, turmeric, cloves, laurel, oregano, mint, rosemary, sage and thyme.
[0051] Typically, fragrant plants are lavender, roses and eucalyptus.

[0052] Typically, medicinal plants are listed A of traditionally used medicinal plants (French Pharmacopoeia, January 2016, Agenence Nationale de Safety du Medical (ANSM) [French National Agency for Drug and He]. It is a plant shown in the document of Product Safety (French National Pharmaceutical and Medical Product Safety Agency)], or a plant known to contain a compound having therapeutic properties. Typically, the medicinal plants listed are ginkgo, ginseng, sour cherry, peppermint, willow, and red vine.

[0053] Typically, eucalyptus is known to contain compounds with therapeutic properties among medicinal plants.
[0054] Typically, the plant fibers and plant extracts of the reconstituted plant sheets of the invention can be derived from various plant parts, which are either part of the plant itself or parts of various plants. It is the result of processing. Typically, the plant part can be a whole part of the plant or debris resulting from threshing or mixing and finely chopping a part of the plant.

[0055] Typically, the plant part can be selected from the plant parts most abundant in aromatic compounds that impart sensory properties to the aerosol. Typically, these parts are the whole plant, the aerial part of the plant, eg, flower buds, branch bark, trunk bark, leaves, flowers, fruits and their floral patterns, seeds, petals, flower heads, or subterranean parts. , For example, bulbs, roots, bark, rhizomes, or mixtures thereof. The plant part may be the result of mechanical, chemical or mechanical treatment of one or more plant parts. For example, the pods that protect cocoa beans fall into this category as a result of the cocoa stripping process.

[0056] Typically, the portion of the tobacco plant may be the most abundant portion of the aromatic compound that imparts sensory properties to the aerosol. Typically, the portion of the tobacco plant can be parenchyma (leaf blade), but the stem of the tobacco plant may optionally be added. Typically, the portion of the tobacco plant is a leaf of the tobacco plant or debris resulting from threshing or mixing and finely chopping the leaves and veins of the tobacco plant into scaffelrati (chopped tobacco). It is possible.

[0057] Among edible plants, for example, garlic bulbs, coffee cherries (coffee tree fruits), toushikimi fruits (octagonal), ginger rhizomes, licorice roots and louis boss leaves, stevia or tea as parts. Can be chosen.

[0058] Among aromatic plants, for example, the cloves, basil, laurel and sage leaves, mint, oregano, rosemary and thyme leaves and flower heads, or turmeric rhizomes may be selected as portions. ..

[0059] Typically, among fragrant plants, lavender flowers and flower heads, or rose flower buds and petals may be selected.
[0060] Among the medicinal plants listed in the French Pharmacopoeia are, for example, ginkgo leaves, underground parts of Korean ginseng, sour cherry fruit flower pattern (cherry stalk), peppermint leaves and flower heads, yanagi. The bark and leaves of the trunk, or the leaves of red vine can be selected.

[0061] According to one particular embodiment, the reconstituted plant sheet has a density of 0.65 g / cm ³ to 1 g / cm ³ , a basis weight of 90 g / m ² to 200 g / m ² and a thickness of 140 μm to 325 μm. Now, it can have 16% to 25% _SAG , 27% to 35% SP, and 50% to 60% _{SP + SAG} , and the plant is a tobacco plant.

[0062] Typically, the solid content (depending on weight) of the micronized plant fiber contained in the reconstituted plant sheet is 15% to 70%, particularly 30% to 61%, more specifically 40%. It can be up to 57%.

[0063] Typically, the fibrous support of the reconstructed plant sheet may also include cellulosic plant fibers.
[0064] Cellulosic plant fibers are fibers obtained by chemical or mechanical or thermomechanical cooking steps, such as wood pulp, hemp, or annual plants such as flax. Mixtures of these cellulosic plant fibers can also be used.

[0065] Conveniently, these cellulosic plant fibers can improve the mechanical strength properties of the reconstituted plant sheet.
[0066] Typically, cellulosic plant fibers are 0.5% to 20%, particularly 3% to 17.5%, and more specifically 5% to 15% by weight, of the solid content of the reconstituted plant sheet. Can occupy.

[0067] According to the second subject, the present invention relates to a method for producing a reconstituted plant sheet as defined above.
a) The process of passing the finely divided plant fibers through a paper machine to construct a fibrous support,
b) comprises contacting the aerosol-producing agent and the plant extract with the fibrous support to obtain a wet reconstituted plant sheet, and c) drying the wet reconstituted plant sheet.

[0068] According to the present invention, the fibrous support is manufactured using a papermaking method. According to one preferred embodiment, the reconstituted plant sheet according to the present invention is a reconstructed plant sheet obtained by a papermaking method.

[0069] Typically, the fibrous support constructed in step a) can have a basis weight of 25 g / m ² to 150 g / m ² . In particular, the minimum value of the basis weight may be 55 g / m ² , 60 g / m ² , 65 g / m ² , 70 g / m ² , 75 g / m ² .

[0070] Conveniently, a fibrous support having a basis weight within the above range makes it possible to obtain the desired high density.
[0071] Typically, the fibrous support constructed in step a) can have a thickness of 70 μm to 430 μm, particularly 100 μm to 350 μm, and most specifically 120 μm to 300 μm.

[0072] The basis weight and thickness of the fibrous support are typically measured by the same method as the basis weight and thickness of the reconstructed plant sheet.
[0073] According to one embodiment, the plant fiber and the plant extract of the fibrous support are obtained according to the following steps.

d) Mix one or more plant portions with a solvent to extract the plant extract from the plant fiber.
e) The plant extract is separated from the plant fiber.
[0074] Therefore, plant extracts and plant fibers are obtained by the dissociation method. In step d), one or more plant portions are mixed with a solvent, for example in a cooking pot, to extract the plant extract from the plant fiber. In step e), the plant extract is separated from the plant fiber, for example by passing it through a screw press, and the plant fiber is isolated and obtained on the one hand and the plant extract on the other hand.

[0075] Typically, the solvent can be a non-polar solvent, an aprotic polar solvent, a protic polar solvent, or a mixture thereof. In particular, the solvent can be methanol, dichloromethane, ethanol, acetone, butanol, water or a mixture thereof. More specifically, the solvent is ethanol, acetone, water or a mixture thereof.

[0076] According to one particular embodiment, the solvent is an aqueous solvent, most specifically the solvent being water.
Those skilled in the art will be aware of how to adapt the solvent temperature in step d) to the plant, plant portion and plant portion to be treated. Typically, the solvent temperature during root or bark treatment is higher than the solvent temperature during leaf or petal treatment.

[0078] Typically, the temperature in step d) can be 10 ° C to 100 ° C, particularly 30 ° C to 90 ° C, and more specifically 50 ° C to 80 ° C.
[0079] According to an 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, when treating the stems of tobacco plants, the temperature of the water can be between 50 ° C and 80 ° C. Typically, when treating the parenchyma of a tobacco plant, the temperature of the water can be between 30 ° C and 70 ° C.

[0080] Typically, plant fibers are refined by a beating machine (refiner) and then passed through a paper machine to form a fibrous support.
[0081] Typically, micronized plant fibers can be derived from a variety of plants.

[0082] The fibers of each plant can be obtained separately according to the above dissociation method. They can then be mixed and a mixture of these various plant-derived fibers passed through a paper machine to allow the construction of fibrous supports. It is also possible to obtain fibers derived from various plants by combining one or more parts of various plants and then subjecting them to the above dissociation method. The water temperature is then adjusted to the plant to be treated, especially the plant that requires the highest water temperature to extract the extract of that plant. This alternative embodiment is very convenient as it allows the fibers of various plants to be obtained without performing several dissociation methods in parallel.

[0083] Typically, the plant extract can be an extract of various plants.
[0084] Extracts of various plants can be obtained by mixing various plant extracts obtained separately according to the above dissociation method. It is also possible to obtain extracts of various plants by combining one or more parts of various plants and then subjecting them to the above dissociation method. The water temperature is then adjusted to the plant to be treated, especially the plant that requires the highest water temperature to extract an extract of its water-soluble plant. This alternative embodiment is very convenient as it makes it possible to obtain extracts of various plants without having to carry out several methods in parallel. In both of these cases, the extracts of various plants are brought into contact with the fibrous support in step b).

[0085] Typically, the various plant extracts obtained according to the dissociation method can also be contacted separately with the fibrous support in step b).
[0086] Typically, the plant extract can also be concentrated prior to contact with the fibrous support in step b). A device such as a vacuum evaporator can be used to concentrate the plant extract.

[0087] Typically, in step b), the plant extract and the aerosol-producing agent can be in turn in contact with the fibrous support, or mixed and contacted together with the fibrous support.

[0088] Typically, step b) of contacting the plant extract can be carried out by impregnation or spraying, especially impregnation. Typically, impregnation can be performed by size press.
[0089] For example, it is possible to reduce the line pressure applied by the size press during step b) in order to obtain the desired high density. Typically, this line pressure during step b) is the size used in conventional papermaking methods for producing reconstituted plant sheets, as described in the applications of FR 15 59081 and FR 17 57991. Much lower than the line pressure applied by the press.

[0090] It is also recommended that the total amount of plant extract and aerosol generator used in step b) be adapted to the basis weight of the fibrous support in order to obtain the desired high density.
[0091] Being bound by some theory, as opposed to the conventional method for producing reconstituted plant sheets, i.e., for producing reconstituted plant sheets with a density of less than 0.6 g / cm ³ . Although not desired, the inventors hope that step b) of the method of the invention will allow the fibrous support to be impregnated with the plant extract and the aerosol-producing agent to obtain the desired high density. I think it is possible. This unique impregnation makes it possible to obtain a uniform distribution of the plant extract and aerosol-producing agent on the fibrous support and to increase the rate of nicotine transfer.

[0092] Typically, one of ordinary skill in the art will be aware of how to adapt the operating conditions to carry out the drying step c).
[0093] Typically, the drying step c) is an infrared ramp, American battery drying drums, hot air drying in a tunnel dryer, a vertical dryer, a fluidized floor dryer, It can be carried out by an air dryer (pneumatic drier), especially in a tunnel dryer.

[0094] The reconstituted plant sheet of the present invention can then be cut into single leaves or rolled into rolls, similar to sheets or tobacco strips. Several sheets can also be assembled to form a mixture of sheets.

[0095] The reconstructed plant sheet of the present invention can be used in a device for heating tobacco without burning it.
[0096] So, according to a third subject, the present invention relates to the use of the reconstituted plant sheet as defined above in a heating device, particularly a device for heating tobacco without burning.

[0097] For the purposes of the present invention, the term "device for heating a cigarette without burning" refers to any device that allows the formation of an aerosol intended to be inhaled by a smoker. .. Since aerosols are an alternative to smoke, smokers can inhale the aroma of plants, but at the same time the smoker's exposure to harmful components is significantly reduced.

[0098] Typically, the heating device is a lodging for placing and holding a reconstructed plant sheet of the invention containing an air intake, a heater, a productant, and a smoker's mouth in the direction of the airflow. Includes an air outlet for. The air intake, heating element, rosing and air outlet are typically at least fluidly connected to each other.

[0099] Typically, when a heating device is used, air is sucked into the heating device from the air intake by the smoker; then the sucked air passes through the heating part and becomes hot air; is retained in the rosing. Upon contact with the reconstituted plant sheet of the invention, which contains a productant, hot air forms an aerosol, which is then inhaled by the smoker. If the plant is a medicinal plant, the aerosol formed has therapeutic properties.

[0100] Moreover, thanks to the heating device, there is no burning of the sheet. Thus, smokers can take advantage of the sensory properties of plants, optionally tobacco, but at the same time their exposure to harmful components is significantly reduced.

[0101] Reconstructed Tobacco Sheet 1 According to the Present Invention
[0102] A mixture of Virginia-type tobacco scrap and stems is brought into contact with water at 65 ° C. with stirring for 45 minutes. The tobacco extract is separated from the fibrous portion by mechanical pressurization. Tobacco extract is concentrated under vacuum until the solid content concentration is 54%. Glycerol is added to the concentrated tobacco extract as an aerosol producer.

Tobacco fibers are refined to have a shopper leaguer degree of 55 ° SR and then passed through a laboratory paper machine to construct a fibrous support. It has a basis weight of about 77 g / m ² .
A reconstituted tobacco sheet was produced by contacting a concentrated tobacco extract containing glycerol with a fibrous support by impregnation with a size press, and _{SP: 27.3%, SAG :} 23 in the produced reconstructed tobacco sheet. Get 0.7% and total S _{AG + SP} : 51%.

[0103] This sheet has a density of 0.68 g / cm ³ , a basis weight of 145 g / m ² and a thickness of 212 μm.
[0104] Reconstructed tobacco sheet according to the present invention 2
[0105] Another reconstituted tobacco sheet is manufactured according to the above method. The differences are as follows. Using a mixture of Virginia-type tobacco strips and stems, the shopper leaguer degree is 25 ° SR, the basis weight of the fibrous support is about 78 g / m ² , and the _SAG is 20.7%. , SP is 30.8%, and the total _{S AG +} SP is equal to 51.5%.

[0106] This sheet has a density of 0.69 g / cm ³ and a basis weight of 156 g / m ² and a thickness of 226 μm.
[0107] Reconstructed tobacco sheet according to the present invention 3
[0108] Another reconstituted tobacco sheet is manufactured according to the above method. The differences are as follows. Using a mixture of Virginia-type tobacco strips and stems, the shopper leaguer degree is 25 ° SR, the basis weight of the fibrous support is about 63 g / m ² , and the _SAG is 21.1%. , SP is 35.4%, and the total _{SAG + SP} is equal to 56.5%.

[0109] This sheet has a density of 0.61 g / cm ³ and a basis weight of 129 g / m ² and a thickness of 186 μm.
[0110] Reconstructed tobacco sheet not according to the present invention
[0111] A reconstructed tobacco sheet according to the present invention is manufactured according to a procedure similar to the above. The difference is that the basis weight of the fibrous support is 57 g / m ² , the SP is 34.1%, the _{S AG} is 14.9%, and the total S _{AG + SP} is 43%. Is.

[0112] This reconstituted tobacco sheet has a density of less than 0.6 g / cm ³ , a basis weight of 95 g / m ² and a thickness of 166 μm.
[0113] Nicotine movement speed
[0114] The nicotine transfer rate of the reconstructed tobacco sheet 1 according to the present invention and the reconstructed tobacco sheet according to the present invention is determined using a glo ^TM type heating system according to the following protocol.

[0115] The nicotine transfer rate in the reconstituted tobacco sheet is calculated by dividing the nicotine content in the aerosol produced by heating the reconstructed tobacco sheet by the nicotine content in the reconstructed tobacco sheet.

[0116] The nicotine content in the aerosol produced by heating the reconstituted tobacco sheet is determined as follows.
Empty the tobacco from a commercially available dunhill stick of a glo ^TM tube purchased in Italy in August 2018, and use the sheet of scaffel lati (chopped tobacco) to be tested on the tube with a tobacco weight of 260 mg / stick and drawing resistance (drawing). resistance) Fill with 70 ± 3 mm water column.

Aerosols are generated from a Borgwaldt RM04 smoking device equipped with a filling stick (by applying the instructions included with the glo ^TM heating system).

The aerosol material is collected in a 40 mm Cambridge filter. It is then dissolved in methanol.
The nicotine content in the aerosol is assayed for n-heptadecane (used as standard) by FID after separation by gas chromatography. The nicotine content of the aerosol is measured according to standard ISO 10315: 2013, but methanol is used instead of the isopropanol described in the standard. The chromatographic material used is the same as that used for the analysis of nicotine on the test sheet. Do the same 6 times to determine the nicotine content in the aerosol.

[0117] The nicotine content in the reconstituted tobacco sheet is determined as follows.
The nicotine content in the sheet is 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).

[0118] The results of the tested sheets are shown in [Table 1] below.
[0119] From these results, it can be seen that the nicotine transfer rate of the reconstructed tobacco sheet 1 according to the present invention is significantly higher than the nicotine transfer rate of the tobacco sheet having a density of less than 0.6 g / cm ³ .

[0120] [Table 1]

[0121] Sensual properties
[0122] Tobacco sheets according to the present invention and non-tobacco sheets according to the present invention are cut into scavenger lati (chopped tobacco) and then smoked alternately by an independent expert in a glo ^TM heating system.

[0123] According to independent experts, all aerosols formed during smoking of tobacco sheets according to the invention have very satisfactory sensory properties, especially aerosols are not too bitter and irritating. It is not too strong, not too aggressive, has a mellow, well-balanced and good taste, and is superior to aerosols formed during smoking of tobacco sheets according to the present invention.

Claims (10)

Reconstructed plant sheet
-Fiberous support containing micronized plant fiber-Aerosol-producing agent and-Containing plant extract, the density of the reconstituted plant sheet is greater than or equal to 0.6 g / cm ³ and the solid content of the aerosol-producing agent. A reconstituted plant sheet characterized by a total content (depending on weight) of 10% to 29%. The reconstructed plant sheet according to claim 1, wherein the density of the reconstructed plant sheet is 0.62 g / cm ³ to 1.50 g / cm ³ . The reconstructed plant sheet according to claim 1 or 2, wherein the plant is a tobacco plant. The reconstituted plant sheet according to any one of claims 1 to 3, wherein the total solid content (depending on the weight) of the plant extract is 20% to 45%. 13. Reconstructed plant sheet. The reconstructed plant sheet according to any one of claims 1 to 5, wherein the reconstructed plant sheet has a thickness of 100 μm to 450 μm. The reconstructed plant sheet according to any one of claims 1 to 6, wherein the reconstructed plant sheet has a basis weight of 60 g / m ² to 300 g / m ² . Any one of claims 1 to 7, wherein the aerosol-producing agent is sorbitol, glycerol, propylene glycol, triethylene glycol, lactic acid, glycerol diacetate, glyceryl triacetate, triethyl citrate, isopropyl myristate, or a mixture thereof. Reconstructed plant sheet described in section. A method for producing a reconstituted plant sheet as defined in claims 1 to 8, wherein the following steps:
a) A process of constructing a fibrous support by passing finely divided plant fibers through a paper machine.
b) A production method comprising contacting an aerosol-producing agent and a plant extract with the fibrous support to obtain a wet reconstituted plant sheet, and c) drying the wet reconstituted plant sheet. Use of the reconstituted plant sheet as defined in claims 1-8 in a heating device.