Tobacco processing

Abstract

The present invention provides a method for producing dry ice expanded tobacco and treated dry ice expanded tobacco obtainable by this method. The invention also provides a non-combustible aerosol supply system or aerosol-free delivery system comprising the treated dry ice expanded tobacco. The invention also provides aerosol-generating materials and consumables comprising the treated dry ice expanded tobacco for use in a non-combustible aerosol supply system.

Description

Technical Field

[0001] The present invention relates to a method and in particular to a processing method for dry ice expanded tobacco (DIET). Background Art

[0002] In the later stages of tobacco processing, the tobacco material local flavor (flavour, taste) and fragrance (aroma) are usually added to the tobacco, and extra processing steps and equipment may be required, which may consume cost and time. Summary of the Invention

[0003] According to a first aspect of the present invention, there is provided a method for processing dry ice expanded tobacco (DIET) enclosed in a moisture-retaining material, the method comprising exposing the tobacco to an ambient processing temperature above 45°C, wherein the tobacco has a mass fraction of 60 to 160 kg / m at the start of the method. 3 The method can be used to produce tobacco having desired organoleptic properties.

[0004] DIET may optionally be adapted for use in a non-flammable aerosol delivery system or a non-aerosol delivery system. Thus, according to a second aspect of the present invention, there is provided a method for producing DIET for use in a non-flammable aerosol delivery system or a non-aerosol delivery system, the method comprising exposing the DIET encapsulated in a humectant material to an ambient processing temperature above 45°C, wherein the tobacco has a mass fraction of 60 to 160 kg / m at the start of the method. 3 The method can be used to produce tobacco having desired organoleptic properties.

[0005] Features of the aspects and embodiments described herein may apply to both the first and second aspects of the invention.

[0006] The method of the first or second aspect may comprise encapsulating or securing the tobacco within a moisture retaining material prior to exposing the tobacco to the specified conditions.

[0007] According to a third aspect, there is provided treated dry ice expanded tobacco obtainable by the method of the first or second aspect.

[0008] A fourth aspect provides treated dry ice expanded tobacco produced according to (or obtained by) the method of the first or second aspect.

[0009] A fifth aspect provides an aerosol-generating material for use in a non-flammable aerosol delivery system, the aerosol-generating material comprising the processed dry ice-expanded tobacco material of the third aspect or the fourth aspect.

[0010] A sixth aspect provides a consumable for use in a non-flammable aerosol supply system, the consumable comprising the processed dry ice expanded tobacco of the third aspect or the fourth aspect or the aerosol generating material of the fifth aspect.

[0011] Yet another aspect provides a non-flammable aerosol delivery system comprising the processed dry ice-expanded tobacco of the third or fourth aspect, the aerosol-generating material of the fifth aspect, or the consumable of the sixth aspect. The methods described herein may also further comprise incorporating the processed dry ice-expanded tobacco material into the non-flammable aerosol delivery system, or into the aerosol-generating material or consumable thereof.

[0012] The method described herein may further comprise incorporating processed dry ice expanded tobacco material into the blend. The blend may be suitable for use in a non-flammable aerosol supply system or an aerosol generating material or consumable thereof. Suitable amounts of processed dry ice expanded tobacco in the blend are given below.

[0013] A further aspect provides use of the processed dry ice-expanded tobacco material of the third or fourth aspect for manufacturing an aerosol-generating material for use in a non-flammable aerosol supply system or a consumable for use in a non-flammable aerosol supply system; or for manufacturing an aerosol-free delivery system.

[0014] Yet another aspect provides an aerosol-free delivery system comprising the treated dry ice-expanded tobacco material of the third aspect or the fourth aspect.The methods described herein may further comprise incorporating the dry ice-expanded tobacco material into the aerosol-free delivery system.

[0015] Yet another aspect provides a tobacco extract made from the DIET of the third or fourth aspect. Yet another aspect provides a nicotine delivery system comprising such an extract. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For illustrative purposes only, embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0017] Figure 1 A flow chart of a method for producing dry ice expanded tobacco;

[0018] Figure 2A cross section of a tobacco leaf is shown before (top) and after (bottom) dry ice expansion. The scale bar in each image (center, bottom) corresponds to a distance of 100 microns.

[0019] Figure 3 The present invention is a flow chart of a method for producing expanded tobacco stems (stem tobacco, stem tobacco, stemmed tobacco).

[0020] Figure 4 A picture of DIET being processed as it passes through a set of doffer rollers (doffer, discharge roller, and feed roller). DETAILED DESCRIPTION

[0021] Expanded tobacco material is a tobacco material that has undergone an expansion process. Expansion relates to the volume that increases the cell structure of tobacco material, and this can cause the area and the interval between any fibers present in the tobacco material to increase. After undergoing the expansion process, the tobacco material has a higher filling value but a lower density than the tobacco material before the expansion process. Expanded tobacco can be blended with other types of tobacco, for example, to provide the consumables for non-flammable aerosol supply systems or aerosol-free delivery systems, and the gross weight of these consumables is lower than that of traditional consumables or aerosol-free delivery systems. Reducing gross weight can provide multiple advantages, such as reduced transportation costs. In addition, reducing weight can also have a positive (positive, positive) impact on the environment, because the energy required for transporting is less. In addition, consumers may prefer to carry and use lighter consumables or delivery systems. Expanded tobacco types include dry ice expanded tobacco and expanded stems. The expanded stems are formed by the steam expansion of the tobacco stems.

[0022] However, expanded tobacco materials can impair the organoleptic properties of tobacco blends containing them, which may limit the amount of expanded tobacco material that can be included in a blend while maintaining an acceptable taste profile.

[0023] The present invention relates to a method for treating dry ice expanded tobacco (DIET). The treatment advantageously alters the organoleptic properties of DIET. However, the inventors have found that these desired changes in organoleptic properties were not observed when other types of expanded tobacco were subjected to the same treatment. In particular, it was determined by professional smokers that there was no significant change in the taste profile between treated and untreated expanded stems (i.e., expanded stems before and after the treatment method described herein). In contrast, a change in the taste profile between treated and untreated DIET (i.e., DIET before and after the treatment method described herein) was found. That is, the inventors have unexpectedly found that the method of the present invention is particularly suitable for improving the organoleptic properties of DIET, but not for improving the organoleptic properties of expanded stems.

[0024] The favorable changes in the sensory properties of DIET tobacco provided by the methods herein mean that the treated tobacco can be added to tobacco blends (e.g., for use in non-flammable aerosol supply systems or aerosol-free delivery systems) in higher amounts than untreated DIET tobacco without compromising the sensory properties of the tobacco blend.

[0025] The inventors have also found that the high filling value of the dry ice expanded tobacco is maintained during the method of the present invention. The filling value of the dry ice expanded tobacco can even be increased during the method.

[0026] As used herein, the term 'treated tobacco' refers to tobacco that has been subjected to the treatment methods described herein, and the term 'untreated tobacco' refers to tobacco that has not been subjected to the treatment methods.The tobacco used in the method of the present invention is dry ice expanded tobacco (DIET).

[0027] Tobacco undergoes several steps before it is consumed by consumers. In the field, the following steps are usually performed by farmers: sowing, transplanting, growing, harvesting and curing.

[0028] Typically, tobacco is cured after harvest to reduce its moisture content, typically from about 80% to about 20% or less. Tobacco can be cured in a variety of different ways, including air-curing, fire-curing, flue-curing, and sun-curing. During the curing stage, the tobacco undergoes certain chemical changes and transforms from green to yellow, orange, or brown. Temperature, relative humidity, and bulk density are carefully controlled in an effort to avoid houseburn and rot, which are common problems encountered during curing.

[0029] At the Green Leaf Threshing (GLT) plant, tobacco is sold by farmers and typically goes through the following steps: regrading; green leaf blending; conditioning; stem removal by destemming or threshing (or omitted if whole leaf); drying; and packaging.

[0030] Typically, after curing, the stems are removed from the leaves. This is accomplished by threshing, where the midrib and some of the veins are separated from the leaves by a machine. Alternatively, the stems are removed from the leaves manually, a process known as "hand-stripping." Alternatively, the tobacco can be "butted," which means the thicker stems are removed while the rest of the leaf remains intact.

[0031] Except modulation, tobacco also can be further processed to enhance its taste and aroma.Aging and fermentation are known technologies that are used to enhance tobacco taste and aroma.These methods are applicable to tobacco materials such as threshed blades, hand-stripped blades, blades processed through trimming and / or whole leaf tobacco.

[0032] Aging typically occurs after the tobacco has been cured, threshed (either stemmed or hand-stripped), and packaged. Aged tobacco includes pipe-cured and air-cured Oriental tobaccos. During aging, the tobacco is typically stored at a temperature of about 20°C to about 40°C and at the relative humidity of its country of origin / aging, or under controlled warehouse conditions, for approximately one to three years.

[0033] It is important that the moisture content of the tobacco be maintained at a relatively low level during aging, for example up to about 10-13%. If the moisture content is higher, the tobacco will become moldy.

[0034] Fermentation is a process applied to certain tobaccos, including dark air-cured tobacco, cured oriental tobacco, and cigar tobacco, to give the tobacco a more uniform color and alter its aroma and flavor. Fermentation is not generally applied to pipe-cured and light air-cured tobaccos. Fermentation is also not generally applied to diet tobaccos.

[0035] Fermentation parameters (such as the moisture content and environmental conditions of tobacco) can change along with the tobacco type that is just experiencing fermentation.Usually, fermentation humidity or the moisture content (about 16-20%) of tobacco when being received from farmer is similar, or tobacco is rehumidified to slightly higher moisture content.Must be careful to avoid tobacco when fermenting under the situation that moisture content is too high and produce various rots.The duration of fermentation period can be different, and scope is from several weeks to several years.

[0036] Usually, fermentation involves processing large volumes of tobacco and is suitable for full leaves, and after processing, the stems are removed immediately. The tobacco can be piled into a large heap, and the tobacco on the periphery can be moved to the center of the heap at intervals. Alternatively, tobacco can be placed in a chamber of several square meters in volume. Processing such large volumes of tobacco may be loaded down with trivial details and / or time-consuming.

[0037] In some embodiments, the present invention relates to a method for preparing tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation. The method comprises the steps of: preparing the tobacco by fermentation and preparing the tobacco by fermentation.

[0038] Following the above treatments, the tobacco is typically shipped elsewhere for further processing, such as before being incorporated into tobacco-containing products.

[0039] In addition or alternatively, available additive processing tobacco is to improve or strengthen the local flavor and the fragrance of tobacco.Yet this needs extra processing step and device, makes tobacco preparation method long consuming time and comparatively expensive usually.In addition, there is tobacco material in expectation, it has taste and the fragrance that the consumer likes, but does not apply any additive to it in order to realize this point.For example, for the consumer who wants natural tobacco product (it also has pleasing local flavor and / or taste), this is exactly this situation.Usually, in the place of producing smoking article, additive is applied, although the point (point, position) that applies additive can be different.

[0040] In some embodiments, the method for processing tobacco material described herein can produce the dry ice expanded tobacco material with the organoleptic properties of expectation in the shorter time period of more traditional technology such as fermentation and aging and when not adding flavoring agent or aromatic additive.In some embodiments, method of the present invention does not relate to fermentation or does not relate to fermentation basically.This can be proved by tobacco material having very little or no microbial content when the method finishes.Therefore, in one embodiment, the microbial content of tobacco material is lower than the microbial content of tobacco material when the method begins when the method finishes.

[0041] In some embodiments, the methods of processing dry ice expanded tobacco materials described herein produce tobacco having enhanced flavor characteristics or enhanced sensory properties (compared to the flavor characteristics of dry ice expanded tobacco that has not been treated or that has only been treated using traditional brewing methods). This means a reduction in off-notes or irritants while retaining the tobacco taste characteristics that are visible according to traditional brewing. As used herein, the terms "enhance" or "enhancement" used in the context of flavor or sensory properties refer to a professional smoker's determination that there is an improvement or refinement (refinement, optimization) in taste or flavor quality. This may, but does not necessarily, include strengthening of taste.

[0042] In some embodiments, the methods of processing dry ice expanded tobacco materials described herein produce tobacco materials in which at least one undesirable taste or flavor characteristic has been reduced. For example, dryness and harshness can be reduced.

[0043] In some embodiments, the methods described herein can be used to enhance the organoleptic properties of dry ice expanded tobacco starting materials that have poor sensory properties (e.g., flavor). It has been found that processing the dry ice expanded tobacco material has at least one effect of removing or reducing sensory factors that have a negative impact on the overall sensory properties of the tobacco material. In some embodiments, the methods can also result in an increase in positive sensory properties.

[0044] In some embodiments, the method of processing dry ice expanded tobacco can be adjusted to produce a processed material having specific selected organoleptic properties. For example, this can involve adjusting one or more parameters of the method.

[0045] In some embodiments, the method for processing dry ice expanded tobacco material described herein has converted the flavor characteristics of tobacco (compared with the flavor characteristics of tobacco that has not yet been processed or that only uses traditional modulation method to process).This refers to that the tobacco organoleptic properties after processing have significant changes, so that the taste characteristics of tobacco are changed compared with the taste characteristics of untreated DIET tobacco.As used herein, the term " conversion (transform) " or " conversion (transformation) " used in the context of flavor or organoleptic properties refers to the change that is determined by professional smokers to exist from a kind of overall taste or organoleptic characteristics to another.This can include the improvement and / or improvement in taste or in taste quality.

[0046] In some embodiments, including those in which the organoleptic properties of the tobacco starting material have been transformed, processing has the effect of not only reducing or removing organoleptic factors that have a negative effect, but also introducing or increasing organoleptic factors that have a positive effect. For example, in some embodiments, the methods described herein result in an increase in the products of the Maillard Reaction, many of which are known to contribute to desirable organoleptic properties.

[0047] Mention herein that the organoleptic properties of tobacco material can refer to the organoleptic properties of tobacco material itself (for example when used orally by a consumer).In addition or alternatively, it can also refer to the organoleptic properties of the smog produced by burning tobacco material or the organoleptic properties of the steam produced by heating tobacco material.In some embodiments, when using or consuming the product, the tobacco material of processing provides a tobacco product comprising the tobacco material having desired organoleptic properties.

[0048] The tobacco material used in the present disclosure is dry ice expanded tobacco. As used herein, the term 'tobacco material' includes any part of any member of the genus Nicotiana and any related by-products, such as leaves or stems. The tobacco material used in the present invention is preferably from the species Nicotiana tabacum.

[0049] Any type, style, and / or variety of dry ice expanded tobacco can be processed. Examples of tobacco that can be used include, but are not limited to, Virginia, Burley, Oriental, Comum, Amarelinho, and Maryland tobaccos, as well as any blends of these types. It will be appreciated by those skilled in the art that processing different types, styles, and / or varieties can result in tobacco having different sensory properties.

[0050] In some embodiments, the tobacco material comprises lamina tobacco material. The tobacco may comprise about 70% to 100% lamina material by weight. For example, the tobacco may comprise about 80% to 100% lamina material by weight, such as about 90% to about 99% lamina material by weight.

[0051] The tobacco material may comprise up to 50%, up to 60%, up to 70%, up to 80%, up to 90%, or up to 100% lamina tobacco material by weight. In some embodiments, the tobacco material comprises up to 100% lamina tobacco material by weight. In other words, the tobacco material may comprise substantially all or all lamina tobacco material.

[0052] In a particular embodiment, the tobacco material comprises, is essentially composed of, or is composed of leaf tobacco, such as leaf tobacco comprising leaf Virginia tobacco. In some cases, the leaf tobacco can be selected from Virginia tobacco, or a blend of Virginia tobacco and Burley tobacco. The weight ratio of Virginia to Burley tobacco can be 1:10 to 10:1, such as 1:5 to 5:1, 1:2 to 2:1, 1:1.5 to 1.5:1, or 1.2:1 to 1:1.2.

[0053] Alternatively, or in addition, the tobacco material may comprise at least 50%, at least 60%, at least 70%, at least 80%, at least 90% or at least 95% by weight lamina tobacco material.

[0054] When the tobacco material comprises lamina tobacco material, the lamina may be in whole leaf form or in cut form. Typically, tobacco material (such as lamina tobacco) is in cut form. Using cut tobacco reduces the time required to impregnate / permeate the tobacco with liquid carbon dioxide during dry ice expansion.

[0055] In some embodiments, the DIET material comprises tobacco stem material. The tobacco may comprise up to about 20% stem material by weight, such as up to about 15% stem material by weight. For example, the tobacco material may comprise 1-20% stem material by weight and 80-99% leaf tobacco by weight, such as 5-15% stem material by weight and 85-95% leaf material by weight.

[0056] Pre-prepared DIET can be processed according to the methods of the present invention. For example, DIET is commercially available. Alternatively, the method can include dry ice expansion of tobacco material to provide DIET, which is then processed as described herein.

[0057] The method for forming DIET is known in the art. For example, dry ice expansion relates to infiltration (or impregnation) tobacco with liquid carbon dioxide under pressure, for example, by immersing tobacco and soaking in liquid carbon dioxide. For example, by draining liquid, recyclable excess liquid and / or gaseous carbon dioxide is for reuse. The method may include, for example, converting the liquid carbon dioxide in the tobacco into solid carbon dioxide (dry ice) by reducing the pressure. When the system is not pressurized (unpressurised), the carbon dioxide in the tobacco can solidify into dry ice. This phase transition can occur at the triple point pressure of CO2 (60.4psig and negative 69.83 degrees Fahrenheit). Subsequently, solid carbon dioxide is subjected to the condition of solid carbon dioxide evaporation (or solid carbon dioxide is subjected to sublimation to form gaseous carbon dioxide), thereby causing tobacco material to expand. For example, the tobacco material comprising solid carbon dioxide can be heated rapidly according to the method given below. After heating, dry ice sublimates to form gaseous carbon dioxide, which forces tobacco to expand.

[0058] Suitable methods for dry ice expansion may include impregnating the cellular structure of the tobacco with liquid carbon dioxide. Typically, the impregnated tobacco is cut tobacco. Suitable conditions for this impregnation step may include contacting the tobacco material in the impregnator container with liquid carbon dioxide under pressure at a temperature of -40 to -10°C (such as -25 to -15°C) for a period of about 1-10 minutes (such as 2-8 or 3-7 minutes). The pressure may be, for example, 435 psig (3000 kPa). Suitable cutting widths are between 1 and 2 inches. Figure 1disclosed in the following description of . Immediately before impregnation, the tobacco material may have a moisture content of 10-40% (such as 15-35% or 20-30%). After the impregnation step, the method typically then includes fully reducing the pressure in the impregnator container to cause solidification of liquid carbon dioxide in the cell structure. For example, the pressure can be reduced to atmospheric pressure (1atm). The method may then involve rapidly heating the tobacco to sublime the solid carbon dioxide in the tobacco cells, thereby causing the tobacco to expand. This rapid heating can be carried out by introducing the tobacco material containing solid carbon dioxide into an air flow having a temperature of 250 to 400° C. (such as 300-360° C. or about 330° C.). The method may then include hydrating the dry ice expanded tobacco to a desired initial moisture content for further processing by the method of the present invention.

[0059] Figure 1 A suitable exemplary method for preparing dry ice expanded tobacco is described. Multiple bundles of tobacco material are sliced ​​and subsequently rehumidified using water and steam. The tobacco material can be any tobacco material described herein. Leaf tobacco, particularly leaf Virginia tobacco, is particularly preferred. One reason for this is that it exhibits desired organoleptic properties and, compared with other tobacco varieties, exhibits relatively low levels of compounds that are considered undesirable. Another benefit of using Virginia tobacco is that it tends to expand easily during the expansion process. In some embodiments, in addition to leaf, tobacco stems can also be used. After rehumidification, the rehumidified tobacco material is blended with other rehumidified tobacco materials or mixed before being fed to a cutting machine. Preferably, the cutting machine cuts the tobacco material at 25 to 28 cuts per inch (inch) (CPI). A cutting width of 25 CPI is particularly preferred, although other cutting widths can also be used. Cutting the tobacco material increases its surface area and therefore reduces the time spent impregnating with liquid during the impregnation step. These cutting widths can also increase the filling value of the final material.

[0060] After wetting the cutting material and blending the wet cutting material, the material has a water content of about 26%. This material is then fed into the impregnator container, which is then charged with carbon dioxide under pressure at a temperature of -20°C for about 6 minutes. These conditions ensure that carbon dioxide remains in liquid form and has enough time to penetrate and be absorbed into the tobacco material. From then on, the impregnated tobacco material is fed into the sublimator, the pressure is reduced so that the liquid carbon dioxide is solidified, and the impregnated tobacco material is heated in an air flow at a temperature of 330°C subsequently. This causes the moisture and carbon dioxide in the tobacco material to evaporate quickly, which causes it to expand.

[0061] Other gas temperatures can be used. For example, the gas temperature can be between about 250°C and about 400°C or higher. The maximum temperature is preferably below the combustion temperature of the tobacco material. High temperatures can improve the expansion rate and, therefore, the efficiency of the method. The fill value of the tobacco material can also be controlled by varying the temperature. Increasing the temperature can result in more moisture being expelled from the material, and, therefore, a higher fill value for the final material. Conversely, using a lower temperature can reduce the fill value of the final material.

[0062] The high gas temperature can be achieved by any suitable means (e.g., by heating the air using a hot plate or burner). The tobacco material at the end of sublimation is relatively dry and has a moisture content of about 6%. The moisture content is increased to about 12% to 14% (typically 13.6% is the target) by hydrating it in a reordering drum to produce the final expanded tobacco material. The expanded material may have a diameter of at least about 6 cm. 3 / g's fill value.

[0063] When referring to "moisture", it is important to understand that there are widely varying and conflicting definitions and terminology in use. Often, "moisture" or "moisture content" is used to refer to the water content of a material, but for certain industries, such as the tobacco industry, it is necessary to distinguish between "moisture" as water content and "moisture" as oven volatiles. Water content is defined as the percentage of water contained in the total mass of the solid matter. Volatiles are defined as the percentage of volatile components contained in the total mass of the solid matter. This includes water and all other volatile compounds. Oven dried mass is the mass remaining after the volatiles have been driven off by heating. It is expressed as a percentage of the total mass. Oven volatiles (OV) is the mass of volatiles that have been driven off.

[0064] The moisture content (oven volatiles) can be measured as the reduction in mass when the sample is dried for three hours ± 0.5 minutes in a forced air oven adjusted to 110° C. ± 1° C. After drying, the sample is allowed to cool to room temperature in a desiccator for approximately 30 minutes to allow the sample to cool.

[0065] Unless otherwise stated, moisture content referred to herein refers to oven volatiles (OV).

[0066] Figure 2 Shown are cross-sections of tobacco leaves before (top) and after (bottom) dry ice expansion. The scale bar (center, bottom) in each image corresponds to a distance of 100 microns. Comparing these images shows the expansion of the tobacco material during the dry ice expansion process.

[0067] A known type of expanded tobacco different from DIET is expanded stems, which may also be referred to as expanded stems or steam-treated stems (STS). The process of forming expanded stems typically involves treating the stems with steam, which causes expansion of the material and an increase in its filling value.

[0068] Figure 3 A method for expanding tobacco stems is shown. Tobacco is loaded into a feeder. The tobacco stems can be derived from any variety of tobacco described herein. After adding water, the moisture content of the stems is about 34%. The mixture is then blended and / or thoroughly mixed with stems from other batches, at which point the stems have a moisture content of about 30% to about 40% (such as about 36%). The material is then cut to ensure that the stem portions have consistent sizes. This cutting can help further increase the filling value of the material. Water is then applied to the cut stems to increase their moisture content to about 35% to about 45%. The relatively high moisture level obtained in this step helps increase the expansion of the stems during the subsequent expansion step. Thereafter, the material is subjected to steam treatment at a temperature above 100°C (e.g., using steam or superheated steam). This results in an increase in the expansion of the stems and their filling value. Steam can be applied at a rate of at least 200kg / hour, such as greater than 300kg / hour or greater than 350kg / hour, for example, from about 375kg / hour to about 500kg / hour. Higher application rates can also be used. The yield can be increased by using a higher steam application rate. The expanded stems can be stored after being dusted using a dust collector.

[0069] As described in the Summary of the Invention, the moisture content of DIET before and during processing is from about 10% to about 23%.As used herein, the term "moisture content" refers to the percentage of oven volatiles present in the DIET material.

[0070] In some embodiments, the water content of DIET before and during treatment is between about 10% and 15.5%, optionally between about 10.5% and 15%, or between about 11% and 14%. The water content of DIET can be about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, about 17%, about 18%, about 19%, about 20%, about 21%, about 22%, or about 23%.

[0071] In some embodiments, for example, when the moisture content of the DIET is between about 10% and 20%, optionally between about 10% and 18%, there is no need to re-dry the tobacco after the treatment method.

[0072] The DIET material is encapsulated in (e.g., fixed in) a humectant material to limit moisture loss and maintain a desired moisture level during the method. The method may further comprise encapsulating or fixing the DIET material in a humectant material before treating the tobacco according to the method of the present invention.

[0073] The DIET material may be completely enclosed within the moisturizing material. Alternatively, the DIET material may not be completely enclosed within the moisturizing material. In some embodiments, the moisturizing material is wrapped around the DIET material. In other embodiments, the moisturizing material is wrapped around a storage container containing the DIET material. In some embodiments, the DIET material is placed within a water-retaining container. Thus, the methods of the present invention may be performed on a DIET material wherein the moisturizing material has been wrapped around the DIET material, or wherein the moisturizing material has been wrapped around a storage container containing the DIET material. Additionally or alternatively, the methods of the present invention may be performed on a DIET material that has been placed within a water-retaining container.

[0074] The moisturizing material can be any material that is sufficiently impermeable to moisture to retain a desired amount of moisture during the treatment process. The amount of moisture retained in the DIET material can be at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, at least 99.5%, or 100% of the moisture present in the DIET material prior to treatment. In some embodiments, between 99% and 100% of the moisture content of the DIET material is retained during the process.

[0075] It is desirable that the moisturizing material resist degradation during the tobacco treatment process. For example, it is desirable that the moisturizing material withstand the temperature of the treatment process without breaking down to become moisture-permeable or releasing compounds that may be absorbed by the tobacco material. Therefore, when selecting a moisturizing material, the temperature reached by the DIET material during the process can be considered.

[0076] The moisturizing material may comprise a flexible material. Such a flexible material may be wrapped around the DIET material and / or formed into a pouch for the DIET. In some embodiments, the moisturizing material comprises a plastic material. In some embodiments, the moisturizing material comprises a flexible polymeric material, optionally a polymeric film or a plastic film. In some embodiments, the moisturizing material comprises polyethylene. In some embodiments, the moisturizing material comprises polyester, nylon, and / or polypropylene. In some embodiments, the moisturizing material is It is available through several suppliers, including Brazil-based Plastrela Flexible Packaging.

[0077] Alternatively or in addition, the moisturizing material may comprise a rigid material, such as metal, which may form a vessel or container, for example. In these embodiments, a separate storage container as discussed below may not be required.

[0078] In embodiments where the DIET material reaches temperatures of about 100°C or greater, the moisturizing material may be pressure resistant.

[0079] In some embodiments, the method may include before the tobacco material is exposed to the ambient processing temperature, making the tobacco material place a period of shelf life when being enclosed in the moisturizing material. The shelf life can be at least 15 days, such as at least 30 days. For example, the shelf life can be 15-75 days, such as 20-60 days or 30-45 days.

[0080] At the beginning of the process, the DIET material has a mass of 60 to 160 kg / m 3 In some embodiments, the DIET material has a bulk density of 70-140 kg / m 3 , 90-135kg / m 3 100-130kg / m 3 or 105-125kg / m 3 The method / processing begins when the DIET is exposed to an ambient processing temperature as defined herein. That is, when the DIET is exposed to an ambient processing temperature, the DIET has a bulk density of 60 to 160 kg / m 3 (such as 70-140kg / m 3 , 90-135kg / m 3 100-130kg / m 3 or 105-125kg / m 3 ) of the bulk density.

[0081] The bulk density herein is calculated by dividing the weight of DIET by the volume occupied by DIET.The bulk density herein is calculated based on the total weight of the tobacco material, including any water / moisture in the tobacco material.

[0082] When the volume of the storage container, the volume enclosed by the moisturizing material, and the volume occupied by the DIET are substantially the same or identical (e.g., when the storage container is substantially completely or entirely filled with the DIET material and tightly enclosed, wrapped, or secured within the moisturizing material), the bulk density can be calculated by dividing the weight of the tobacco placed in the storage container by the volume of the storage container.

[0083] The volume of the storage container and / or the volume enclosed by the moisturizing material (which may be substantially the same) may be selected to achieve a desired bulk density for the desired amount of tobacco to be processed while allowing processing of the tobacco to occur at a suitable rate.

[0084] When the DIET does not occupy the entire volume of the moisturizing material, the volume occupied by the DIET can be calculated by subtracting the volume of any empty space (e.g., any void space above the tobacco material after it has been placed in the moisturizing material and optionally stored in a container) from the total volume enclosed by the moisturizing material.

[0085] The bulk density of the DIET material during and / or after treatment can be similar or substantially similar to the bulk density of the DIET material at the beginning of the process. In some cases, the volume occupied by the DIET material decreases during treatment, and thus the bulk density of the DIET material increases during and / or after treatment.

[0086] The DIET material can be placed in a storage container after being enclosed or secured within a moisturizing material. Alternatively, the DIET material can be placed in a storage container and then enclosed or secured within a moisturizing material, such as by wrapping the moisturizing material around the storage container. Placing the DIET in a container allows the tobacco to be easily handled.

[0087] Alternatively or in addition, the container may be oriented on its side. When the DIET material comprises tobacco leaves, this arrangement may be particularly beneficial when the tobacco leaves are placed in a horizontal position in the storage container, as placing the storage container on its side achieves a more uniform bulk density.

[0088] In some embodiments, the container has a 3 and about 1.0m 3 between, optionally between about 0.4m 3 and about 0.8m 3 In some embodiments, the container has a volume of about 0.7 m 3 volume.

[0089] In some embodiments, at the start of the method, the volume occupied by DIET is about 0.2 m 3 and about 1.0m 3 between, optionally between about 0.4m 3 and about 0.8m 3 In some embodiments, at the beginning of the method, the volume occupied by DIET is about 0.7 m 3 .

[0090] In some embodiments, the storage container is a tobacco box known as a C-48 box. The C-48 box is typically made of cardboard and has dimensions of approximately 115 x 70 x 75 cm.

[0091] DIET can be placed in a tobacco processing area. As used herein, the term 'tobacco processing area' is an area where processing is performed, which can be a room or chamber. During the method, environmental processing conditions (i.e., the conditions in the tobacco processing area) can be controlled. This can be achieved by placing the DIET material encapsulated or fixed in a moisturizing material in a controlled environment such as a chamber. The DIET material can be placed on one or more shelves within the chamber to allow optimal ventilation to maintain constant environmental processing conditions around the tobacco. The shelves can have one or more racks comprising rods with gaps and / or other apertures between the rods to help maintain constant environmental processing conditions around the tobacco.

[0092] Ambient process humidity can be maintained at a level to avoid significant moisture loss from the DIET material. As used herein, the term 'ambient process humidity' refers to the humidity in the tobacco processing area. As used herein, the term 'ambient relative process humidity' refers to the relative humidity in the tobacco processing area.

[0093] In some embodiments, the ambient relative processing humidity is about 65%.The ambient relative processing humidity can be at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, or at least 70%.

[0094] The ambient processing temperature is at least about 45° C. In some embodiments, the ambient processing temperature is at least about 50° C. In some embodiments, the ambient processing temperature may be maintained above 55° C., optionally at about 60° C. As used herein, the term 'ambient processing temperature' refers to the temperature of the tobacco processing area.

[0095] In some embodiments, the ambient processing temperature is at least 46° C., at least 47° C., at least 48° C., at least 49° C., at least 50° C., at least 51° C., at least 52° C., at least 53° C., at least 54° C., at least 55° C., at least 56° C., at least 57° C., at least 58° C., at least 59° C., at least 60° C., at least 61° C., at least 62° C., at least 63° C., at least 64° C., at least 65° C., at least 66° C., at least 67° C., at least 68° C., at least 69° C., or at least 70° C. In some embodiments, the ambient processing temperature is up to 60° C., up to 70° C., up to 75° C., up to 80° C., up to 85° C., up to 90° C., up to 95° C., up to 100° C., up to 105° C., up to 110° C., up to 115° C., or up to 120° C.

[0096] In embodiments where the ambient processing temperature is about 45°C, the ambient processing humidity may be about 30-70 g water / m 3 In embodiments where the ambient processing temperature is about 55°C, the ambient processing humidity may be about 40-80 g water / m 3 In embodiments where the ambient processing temperature is about 60°C, the ambient processing humidity may be about 50-110 g water / m 3 In embodiments where the ambient processing temperature is about 70°C, the ambient processing humidity may be about 50-160 g water / m 3 In embodiments where the ambient processing temperature is about 80°C, the ambient processing humidity may be about 50-230 g water / m 3 In embodiments where the ambient processing temperature is about 90°C, the ambient processing humidity may be about 50-340 g water / m 3 In embodiments where the ambient processing temperature is about 100°C or higher, the ambient processing humidity may be about 50-500 g water / m 3 .

[0097] In some embodiments, the ambient processing temperature is 60°C and the ambient relative processing humidity is 60%.

[0098] During this method, the temperature of the DIET material reaches the ambient processing temperature. The DIET material can reach the ambient processing temperature in a short period of time. For example, the DIET material can reach the ambient processing temperature within 4 to 10 days, optionally within 5 to 9 days, within 7 to 9 days, and / or within 4 to 7 days.

[0099] To achieve this, the amount of DIET processed can be optimized to allow heat to be transferred quickly enough to the center of the tobacco material. The rate at which the temperature of the DIET material rises and reaches the ambient processing temperature will depend on a variety of factors, including the ambient processing temperature, the density of the DIET, and the total amount of DIET processed.

[0100] In some embodiments, the DIET material reaches a temperature greater than 55°C and / or at least 60°C within about 9 days. In some embodiments, the DIET material reaches a temperature greater than 55°C and / or at least 60°C within about 7 days. In some embodiments, the DIET material reaches a temperature greater than 55°C and / or at least 60°C within about 5 days. In such embodiments, the ambient processing temperature may be 60°C.

[0101] In some embodiments, the temperature to which the DIET material is elevated is at least about 55° C. or at least about 60° C. Additionally or alternatively, the temperature to which the DIET material should be elevated can be up to about 80° C., up to about 85° C., up to about 90° C., up to about 95° C., or up to about 100° C.

[0102] In some embodiments, the benefits of processing according to the present invention may be achieved within a shorter processing period by utilizing higher ambient processing temperatures.

[0103] The temperature of the DIET material may be increased during the treatment process to reach a second temperature that is higher than the ambient processing temperature. This may be achieved with the assistance of an exothermic reaction that occurs during the treatment process.

[0104] In some embodiments, the DIET material reaches a second temperature that is greater than the ambient processing temperature. In some embodiments, the second temperature is at least 1°C above the ambient processing temperature, at least 2°C, at least 3°C, at least 4°C, at least 5°C, at least 7°C, at least 10°C, at least 12°C, at least 15°C, at least 17°C, or at least 20°C above the ambient processing temperature. In some embodiments, the DIET material reaches the second temperature that is greater than the ambient processing temperature in about 7 to 13 days, and / or in about 13 days or in about 11 days. In some embodiments, the DIET material reaches the second temperature that is at least 5°C above the ambient processing temperature in about 11 to 13 days.

[0105] During the treatment method, the temperature of the DIET material may reach up to 60°C, up to 65°C, up to 70°C, up to 75°C, up to 80°C, up to 85°C, up to 90°C, up to 95°C, up to 100°C, up to 105°C, up to 110°C, up to 115°C, up to 120°C, up to 125°C, up to 130°C, up to 135°C, up to 140°C, up to 145°C or up to 150°C.

[0106] Alternatively or additionally, during the treatment method, the temperature of the DIET material may reach at least 60° C., at least 65° C., at least 70° C., at least 75° C., at least 80° C., at least 85° C., at least 90° C., at least 95° C., at least 100° C., at least 105° C., at least 110° C., at least 115° C., at least 120° C., at least 125° C., at least 130° C., at least 135° C., at least 140° C., at least 145° C., or at least 150° C. In practice, the upper temperature limit may be limited by the heat resistance of the moisturizing material.

[0107] In some embodiments, the temperature of the DIET material can reach about 55°C to about 90°C, about 55°C to about 80°C, or about 60°C to about 70°C.

[0108] The DIET may be encapsulated or immobilized within a moisture retaining material and exposed to ambient processing temperatures for a period long enough to allow the DIET to develop the desired organoleptic properties, and for a period short enough not to cause unnecessary delays in the tobacco supply chain.

[0109] The DIET material is encapsulated or secured within a moisturizing material for a period of time and subjected to an ambient processing temperature and ambient processing humidity suitable to cause the tobacco temperature to rise to or above a critical temperature, wherein the tobacco has a moisture content between about 10% and 23%. In some embodiments, the critical temperature is 55° C., 60° C., or 65° C.

[0110] In some embodiments, the DIET material is exposed to an ambient processing temperature above 45°C (or any ambient processing temperature disclosed herein) for about 5 to 65 days, such as 10 to 50 days, 20 to 45 days, 30 to 40 days, or 35 to 40 days.

[0111] In other words, the duration of the treatment (excluding any period of time during which the DIET material is encapsulated or immobilized within the moisturizing material prior to exposure to ambient processing temperatures) can be about 5 to 65 days, such as 10 to 50 days, 20 to 45 days, 30 to 40 days, or 35 to 40 days. For example, where the DIET is foliated Virginia tobacco, the duration of the treatment can be 35 to 45 days. For example, where the DIET tobacco is a blend of foliated Virginia tobacco and foliated Burley tobacco, the duration of the treatment can be 30-40 days.

[0112] In other embodiments, the DIET material is exposed to an ambient processing temperature greater than 45° C. (or any ambient processing temperature disclosed herein) for about 30 to 65 days, such as about 40 to 50 days or about 43 to 48 days. In other words, the duration of the treatment (excluding any period of time during which the DIET material is encapsulated or immobilized within the moisturizing material prior to exposure to the ambient processing temperature) can be about 30 to 65 days, such as about 40 to 50 days or about 43 to 48 days. Increasing the duration of the treatment can increase the amount of products of the Maillard reaction, thereby providing a more robust flavor profile of the treated DIET.

[0113] Embodiments in which the DIET material reaches a higher temperature may require a shorter processing time period than embodiments in which the DIET material reaches a lower temperature.

[0114] In other embodiments, the method involves processing the DIET material until the temperature of the DIET material reaches a target temperature, and then cooling the tobacco material. This cooling can be achieved by removing the DIET material from a processing area maintained at an elevated temperature. In some embodiments, the target temperature is 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C, 69°C, or 70°C. In some embodiments, the target temperature is in the range of 62 to 67°C. The target temperature may be different for different types of tobacco.

[0115] After the treatment methods described herein, such as after exposing the tobacco to ambient processing temperatures for any of the treatment durations described above, the DIET can be allowed to stand for a period of stabilization. During this stabilization period, the DIET typically remains encapsulated or immobilized within the moisturizing material.

[0116] The stabilization period can be initiated by removing the DIET material from a processing area maintained at an elevated temperature. For example, the DIET material can be transported to a different processing area at a lower temperature, which can be about 30° C. or lower (such as about 18° C. to about 30° C., or about 20° C. to about 25° C., for example, about 22° C.).

[0117] During the stabilization period, the temperature of the DIET is gradually reduced, typically to a temperature of about 30°C or lower (such as about 18°C ​​to about 30°C, or about 20°C to about 25°C, for example, about 22°C). After this treatment method, the moisture content at the periphery (or on the exterior or surface) of the main body (such as the bundle) of dry ice-expanded tobacco is typically higher than the moisture content at the center (or core) of the main body of dry ice-expanded tobacco. During the stabilization period, moisture from the peripheral dry ice-expanded tobacco can be absorbed back by the dry ice-expanded tobacco in the center / core.

[0118] In other words, after this treatment method, moisture is typically unevenly distributed throughout the batch of processed dry ice-expanded tobacco, with the dry ice-expanded tobacco at the periphery of the batch having a higher moisture content than the dry ice-expanded tobacco at the center (or core) of the batch. During the stabilization period, moisture can become evenly distributed throughout the batch of processed tobacco material. This can help prevent microbial growth in the processed dry ice-expanded tobacco at the periphery of the batch, thereby reducing waste and improving the shelf life of the processed dry ice-expanded tobacco.

[0119] The water content of DIET after the stabilization period may be between about 10% and about 18%, optionally between about 10% and about 15.5%, optionally between about 10.5% and about 15%, such as between about 11% and about 14%.

[0120] The duration of the stabilization period can be at least 15 days, such as at least 30 days. For example, the stabilization period can be 15-75 days, such as 20-60 days or 30-45 days. Typically, the stabilization period is about 40 days.

[0121] When the processing method is carried out in a storage container (such as a cardboard box) discussed above, the stabilization period can also enable the storage container to recover the rigidity that is reduced during the processing method.This can facilitate the subsequent handling and transportation of the processed dry ice expanded tobacco material.

[0122] The inventor has found that the processing method described herein can cause DIET tobacco to form hard clumps (clumps) (also referred to as blocks or pads). Tobacco clumps can also form during the stable period when the temperature of the DIET processed therein gradually decreases. Before the DIET processed can be used in a product, it may be necessary to remove such clumps, products such as non-flammable aerosol supply systems, aerosol generating materials or consumables for non-flammable aerosol supply systems and aerosol-free delivery system. In addition, the inventor has found that when other forms of tobacco are processed into DIET, such as when processing leaf tobacco that has not been previously expanded with dry ice, such tobacco clumps will not form. Without wishing to be bound by theory, the inventor believes that tobacco clumps are formed due to the compressible or fluffy nature of dry ice expanded tobacco. During the processing method in which the temperature of dry ice expanded tobacco increases, the dry ice expanded tobacco material at the top of the moisture retaining material can compress the dry ice expanded tobacco material below it, causing the formation of a compacted tobacco layer or tobacco clumps in the main body of the dry ice expanded tobacco being processed or the bottom of the batch.

[0123] In certain embodiments, following the treatment methods described herein, e.g., after exposing the tobacco to ambient processing temperatures for the treatment duration described above, the method further comprises one or more steps of breaking up any lumps of tobacco material formed during the DIET treatment. For example, the method can further comprise applying one or more shear forces to the lumps of tobacco material and / or shredding the lumps of tobacco material.

[0124] The method may also be performed manually, for example by breaking up lumps of tobacco material formed during processing of the DIET using the hands or hand-operated tools such as hammers, mallets, rods, etc. Alternatively, the method may be performed mechanically, for example as part of a production line.

[0125] In certain embodiments, the method may further include passing the processed DIET through one or more rollers to break up any tobacco clumps in the processed DIET. In certain embodiments, each of the one or more rollers includes a plurality of teeth, spikes and / or raised bars on its surface. In certain embodiments, the one or more rollers may be one or more doffer rollers. The processed dry ice expanded tobacco is typically spread out on a conveyor (such as a conveyor belt) that is configured to transport the processed DIET toward the rollers. The conveyor and the one or more rollers may be arranged so that, in use, the processed dry ice expanded tobacco is dropped through or dropped through the one or more rollers, thereby breaking up one or more tobacco clumps. For example, multiple conveyors may be staggered so that there is one or more drops between them, and one or more rollers may be arranged in one or more drops.

[0126] In some embodiments, the method may include multiple consecutive rolling steps. In certain embodiments, one or more rolling steps are continued until the wt% of the tobacco block reaches a target value, or until the wt% of tobacco material having a particle size of 2.5 cm or less reaches a target value. The target value can be within any of the ranges given below, such as within a range of less than or equal to 15 wt% of the tobacco block, or within a range of 85 wt% or greater of DIET having a particle size of 2.5 cm or less.

[0127] In some embodiments, the method may further include a first rolling step using one or more first rollers, the first rollers including a plurality of first teeth, first spikes, and / or first protruding rods on their surfaces, and a second rolling step using one or more second rollers, the first rollers including a plurality of second teeth, second spikes, and / or second protruding rods on their surfaces, wherein the spacing between the plurality of first teeth, first spikes, and / or first protruding rods is greater than the spacing between the plurality of second teeth, second spikes, and / or second protruding rods. In the first rolling step, any tobacco lumps are broken down into smaller lumps having a first particle size. The smaller tobacco lumps provided by the first rolling step are then broken down into even smaller lumps having an even smaller second particle size in the second rolling step. In certain embodiments, the first rolling step occurs once, and the second rolling step occurs two or more times. Performing the second rolling step multiple times can further reduce the weight percent of tobacco lumps in the processed DIET. In certain embodiments, the second rolling step occurs twice, i.e., the processed DIET passes through the one or more second rollers twice.

[0128] As used herein, the wt% of tobacco mass refers to the mass percentage of processed DIET material that does not pass through a mesh having a pore size of 2.5 cm x 2.5 cm, relative to the total mass of the processed DIET material. In some embodiments, one or more steps of breaking up any mass of tobacco material provides a DIET comprising less than or equal to 15 wt% (i.e., 0-15 wt%) tobacco mass, optionally less than or equal to 10 wt% tobacco mass, such as less than or equal to 5 wt% tobacco mass, less than or equal to 2 wt% tobacco mass, or less than or equal to 1 wt% tobacco mass.

[0129] In other words, one or more steps of breaking up chunks of any tobacco material can provide DIET in which 85 wt% or more (i.e., 85-100 wt%) of the DIET has a particle size of 2.5 cm or less, optionally in which 90 wt% or more, such as 95 wt% or more, 98 wt% or more, 99 wt% or more of the DIET has a particle size of 2.5 cm or less. In this context, the wt% of processed DIET material having a particle size of 2.5 cm or less means the mass percentage of processed DIET material that passes through a sieve having a pore size of 2.5 cm x 2.5 cm, relative to the total mass of the processed DIET material.

[0130] When performing one or more steps of breaking up the blocks of any tobacco material (e.g., when spreading the processed tobacco and passing it through one or more rollers), the DIET processed can be cooled more quickly and the plateau described above can be unexpectedly avoided without adversely affecting the fill value, moisture content, moisture distribution, and taste characteristics of the DIET processed. For example, the temperature of the DIET can drop to a temperature of about 30°C or lower (such as 18°C ​​to about 30°C, or about 20°C to about 25°C, for example, about 22°C) over a period of 0.05 to 3 hours, optionally 0.1 to 2 hours, such as 0.15 to 1 hour or 0.2 to 0.7 hours. Avoiding the plateau can significantly shorten the total processing time of the DIET tobacco material.

[0131] Another aspect of the invention relates to a method comprising breaking up any tobacco chunks in the processed DIET material produced by the method described in the Summary of the Invention.The above embodiments apply mutatis mutandis to this aspect of the invention.

[0132] Filling value (also referred to herein as filling value) is a measure of the volume occupied by a given mass of tobacco when a given pressure is applied at a given moisture content. That is, filling value is a measure of the ability of a material to occupy a specific volume at a given moisture content. In the present invention, filling value can be determined by Test Method A as disclosed in the Examples section below.

[0133] As given above, the high fill value of the dry ice expanded tobacco is maintained during the process. The fill value of the dry ice expanded tobacco may even increase during the process. In some embodiments, the fill value of the processed DIET is at least 6 cm at a moisture content of 13.5%. 3 / g, such as at least 6.5cm 3 / g or at least 7cm 3 In some embodiments, at a water content of 13.5%, the fill value of the processed DIET is 6 to 10 cm 3 / g, such as 6.5 to 9 cm 3 / g or 7 to 8cm 3 / g.

[0134] In some embodiments, at 13.5% water content, the fill value of untreated DIET is at least 6 cm 3 / g, such as at least 6.5cm 3 / g or at least 7cm 3 In some embodiments, at a water content of 13.5%, the fill value of untreated DIET is 6 to 10 cm 3 / g, such as 6.5 to 9 cm 3 / g or 7 to 8cm 3 / g.

[0135] At least one change of the organoleptic properties of tobacco material has been found to be the result that negative properties reduce, for example, owing to having unpleasant taste or having the tobacco material component of stimulating effect reduces.In some embodiments, organoleptic properties are changed by the increase of positive properties, for example, owing to increase or introduce the component that organoleptic properties are made positive contribution, such as the component with pleasing taste.

[0136] In some embodiments, the tobacco material is processed so that it has desirable organoleptic properties in a reliable manner and in relatively large volumes.In some embodiments, the method is a batch method.

[0137] After incubating the DIET for the desired length of time, the treated tobacco can be cooled while still within the humidifying material.

[0138] For the treated DIET material, the process parameters are mild enough to maintain some or all of the physical properties. For example, the DIET material remains sufficiently intact after treatment to allow handling and / or processing for incorporation into tobacco-containing products, such as consumables for non-flammable aerosol supply systems or aerosol-free delivery systems. This allows the treated DIET material to be processed according to standard methods.

[0139] The DIET material of processing can have the color different from untreated DIET material.In some embodiments, DIET material is darker than untreated tobacco material color.Importantly, the DIET material of processing has the organoleptic properties that consumers are acceptable and / or desired.Therefore, can be by processing DIET production under specific condition set with the tobacco material of desired organoleptic properties, and need not add one or more other chemical substances, other chemical substances may be harmful and / or expensive.In addition, the DIET of processing does not need to remove other chemical substances through other processing steps, and other processing steps can make tobacco treatment method increase extra expense and time.

[0140] When tobacco material was wrapped or fixed in the moisturizing material, the organoleptic properties of the DIET material of processing can be developed, during this period, the component in the tobacco material is subjected to chemical change and modification, so that the final product obtains desired organoleptic properties. In some embodiments, the tobacco material of processing can have sweet and spicy and / or strong (dark, deep) taste. In some embodiments, the tobacco material of processing can not have dry (dry, drying) taste and / or bitter taste.

[0141] In some embodiments, the chemical composition of the treated DIET material is significantly different from that of the untreated DIET material. For example, as shown by the data presented in the Examples, in some embodiments, a majority of the sugars within the treated DIET material are converted, and the concentrations of nicotine and total amino acids are reduced.

[0142] Without being limited by theory, it is believed that the changes in the levels of at least some of these compounds are at least partially due to Maillard reactions that occur during the process. Caramelization reactions may also occur during the process, which may result in a decrease in the content of reducing and non-reducing sugars.

[0143] Furthermore, in some embodiments, it can be found that the levels of various amino acids are significantly reduced.

[0144] Thus, the method can result in an increase in at least one Maillard reaction product in the treated DIET material. The Maillard reaction products include: 2,6-deoxyfructosazine; 2,5-deoxyfructosazine; 5-acetyl-2,3-dihydro-1H-pyrrolizine; 2,3-dihydro-5-methyl-1H-pyrrolizine-7-carbaldehyde; 1,2,3,4,5,6-hexahydro-5-(1-hydroxyethylidene)-7H-cyclopenta[b]pyridin-7-one; 1-(1-pyrrolidinyl)-2-butanone; 1-(2,3-dihydro-1H-pyrrolidinyl)-1-methylpyrrolizine-7-carbaldehyde. Increased carotenoid concentrations can also indicate that a Maillard reaction has occurred.

[0145] In some embodiments, the treated DIET material can contain reduced levels of nicotine compared to untreated tobacco material, as shown in the Examples. Nicotine is known to have a bitter taste, and thus reduced levels of this compound can have a positive impact on the taste and aroma of the treated tobacco material.

[0146] Producing DIET materials with desired organoleptic properties advantageously eliminates the need to add other substances to tobacco to provide or enhance its organoleptic properties. Such substances include flavorings and / or aromatic ingredients.

[0147] As used herein, the terms "flavoring agent" and "flavoring agent" refer to materials that can be used to produce a desired taste or aroma in adult consumer products, where permitted by local regulations. They can include extracts (e.g., licorice, hydrangea, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, menthol, Japanese mint, aniseed, cinnamon, herbs, wintergreen, cherry, berry, peach, apple, Drambuie whiskey, bourbon, Scotch whiskey, whiskey, spearmint, peppermint, lavender, white cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, honey essence) , rose oil, vanilla, lemon oil, orange oil, cinnamon, caraway, cognac, jasmine, ylang-ylang, sage, cumin, allspice, ginger, aniseed, coriander, coffee or mint oil from any species of the genus Menthol), flavor enhancers, bitter taste receptor site blockers, sensory receptor site activators or stimulators, sugar and / or sugar substitutes (e.g., sucralose, acesulfame potassium, aspartame, saccharin, cyclamates (cyclamates), lactose, sucrose, glucose, fructose, sorbitol or mannitol), and other additives such as charcoal, chlorophyll, minerals, plant products or breath fresheners. They can be imitation, synthetic or natural ingredients or blends thereof. They can be in any suitable form, for example, oil, liquid or powder.

[0148] The processed DIET material can be incorporated into a non-flammable aerosol supply system. For example, the processed DIET material can be incorporated into an aerosol-generating material for use in a non-flammable aerosol supply system or into a consumable for use in a non-flammable aerosol supply system.

[0149] The processed DIET material can be incorporated into aerosol-free delivery systems.

[0150] As used herein, the term "delivery system" is intended to encompass systems that deliver at least one substance to a user and includes:

[0151] Non-flammable aerosol delivery systems that release compounds from an aerosol-generating material without burning the aerosol-generating material, such as e-cigarettes, tobacco heating products, and hybrid systems that use a combination of aerosol-generating materials to generate an aerosol; and

[0152] Non-aerosol delivery systems that deliver at least one substance to a user orally, nasally, transdermally or otherwise without forming an aerosol, including but not limited to lozenges, chewing gum, patches, products containing inhalable powders, and oral products (such as oral tobacco including snus or moist snuff), wherein the at least one substance may or may not contain nicotine.

[0153] According to the present disclosure, a "non-flammable" aerosol supply system is one in which the constituent aerosol-generating materials of the aerosol supply system (or components thereof) do not burn or ignite in order to facilitate delivery of at least one substance to a user.

[0154] In some embodiments, the delivery system is a non-flammable aerosol supply system, such as an electrically powered non-flammable aerosol supply system.

[0155] In some embodiments, the non-flammable aerosol delivery system is an electronic cigarette, also known as a vaping device or an electronic nicotine delivery system (END), although it should be noted that the presence of nicotine in the aerosol-generating material is not required.

[0156] In some embodiments, the non-flammable aerosol supply system is an aerosol generating material heating system, also known as a heat-not-burn system. An example of such a system is a tobacco heating system.

[0157] In some embodiments, the non-flammable aerosol delivery system is a hybrid system that generates an aerosol using a combination of aerosol-generating materials, one or more of which may be heated. Each aerosol-generating material may be, for example, in solid, liquid, or gel form and may or may not contain nicotine. In some embodiments, the hybrid system includes a liquid or gel aerosol-generating material and a solid aerosol-generating material. The solid aerosol-generating material may include, for example, a tobacco or non-tobacco product.

[0158] Generally, a non-flammable aerosol supply system may include a non-flammable aerosol supply device and consumables for use with the non-flammable aerosol supply device.

[0159] In some embodiments, the present disclosure relates to consumables containing an aerosol-generating material and configured for use with a non-flammable aerosol supply device. Throughout the disclosure, these consumables are sometimes referred to as articles of manufacture.

[0160] In some embodiments, a non-flammable aerosol supply system, such as a non-flammable aerosol supply device thereof, may include an energy source and a controller. For example, the energy source may be an electrical energy source or an exothermic energy source. In some embodiments, the exothermic energy source includes a carbon substrate that can be powered to distribute energy in the form of heat to an aerosol-generating material or a heat transfer material near the exothermic energy source.

[0161] In some embodiments, a non-flammable aerosol supply system may include an area for housing a consumable product, an aerosol generator, an aerosol generating area, a housing, a mouthpiece, a filter, and / or an aerosol modifier.

[0162] In some embodiments, a consumable for use with a non-flammable aerosol supply device may include an aerosol generating material, an aerosol generating material storage region, an aerosol generating material transmission component, an aerosol generator, an aerosol generating region, a housing, a wrapper, a filter, a mouthpiece and / or an aerosol modifier.

[0163] An aerosol-generating material is a material that is capable of generating an aerosol, for example when heated, irradiated or energized in any other way.The aerosol-generating material may, for example, be in the form of a solid, liquid or a semi-solid state such as a gel.

[0164] In addition to the DIET, the aerosol-generating material may comprise one or more active substances and / or flavoring agents, one or more aerosol-former materials, and optionally one or more other functional materials.

[0165] In some embodiments, DIET provided by the methods described herein can be mixed with another aerosol-generating material. That is, DIET can be incorporated into an aerosol-generating composition (or blend) comprising: (i) DIET or an aerosol-generating material comprising DIET, and (ii) optionally one or more additional aerosol-generating materials. The aerosol-generating material (i) comprising DIET and / or the additional aerosol-generating material (ii) can comprise: one or more active substances and / or flavoring agents, one or more aerosol-forming materials, and optionally one or more other functional materials.

[0166] The aerosol-generating material may comprise a binder (such as a gelling agent) and an aerosol-forming agent. Optionally, a filler may also be present. Optionally, a solvent such as water is also present, and one or more other components of the aerosol-generating material may or may not be soluble in the solvent.

[0167] The aerosol-generating material may comprise or be in the form of an aerosol-generating film. The aerosol-generating film may comprise a binder (such as a gelling agent) and an aerosol-forming agent. Optionally, a filler may also be present.

[0168] The aerosol-generating film may have a thickness of about 0.015 mm to about 1 mm. For example, the thickness may be in the range of about 0.05 mm, 0.1 mm or 0.15 mm to about 0.5 mm or 0.3 mm.

[0169] The aerosol-generating film may be continuous. For example, the film may comprise or be a continuous sheet of material. The sheet may be in the form of a wrap, may be aggregated to form an aggregated sheet, or may be chopped to form shredded material. The shredded material may comprise strands or strips of one or more aerosol-generating materials.

[0170] The aerosol-generating film may be discontinuous. For example, the aerosol-generating film may comprise one or more discrete portions or regions of aerosol-generating material, such as dots, strips, or lines, which may be supported on a support. In such embodiments, the support may be planar or non-planar.

[0171] An aerosol-forming film can be formed by combining DIET with a binder (such as a gelling agent), a solvent (such as water), an aerosol former, and one or more other components to form a slurry, and then heating the slurry to volatilize at least some of the solvent to form an aerosol-forming film.

[0172] The slurry may be heated to remove at least about 60 wt%, 70 wt%, 80 wt%, 85 wt%, or 90 wt% of the solvent.

[0173] The aerosol-generating material may comprise or may be an "amorphous solid". In some embodiments, the aerosol-generating material comprises an aerosol-generating film that is an amorphous solid. The amorphous solid may be a "monolithic solid". The amorphous solid may be substantially non-fibrous. In some embodiments, the amorphous solid may be a dried gel. An amorphous solid is a solid material in which a fluid, such as a liquid, is retained. In some embodiments, for example, the amorphous solid may comprise from about 50 wt%, 60 wt%, or 70 wt% amorphous solid to about 90 wt%, 95 wt%, or 100 wt% amorphous solid.

[0174] The aerosol-forming material may comprise one or more components capable of forming an aerosol. In some embodiments, the aerosol-forming material may comprise one or more of glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-erythritol, ethyl vanillate, ethyl laurate, diethyl suberate, triethyl citrate, glyceryl triacetate, a mixture of diacetates, benzyl benzoate, benzyl phenylacetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.

[0175] Aerosol-generating materials for use in non-flammable aerosol delivery systems may typically contain higher amounts of aerosol-forming materials than smokable materials for use in flammable aerosol delivery systems. For example, an aerosol-generating material comprising DIET may contain a total amount of aerosol-forming material of 10 to 60 wt % (DWB), such as 10 to 50 wt % (DWB), 12 to 30 wt % (DWB), or 15 to 35 wt % (DWB), calculated on a dry weight basis (DWB). In these embodiments, the dry weight basis (DWB) refers to all materials excluding any water, and may include components that are themselves liquid at room temperature and pressure, such as glycerol.

[0176] In some embodiments, the aerosol-generating composition (or blend) comprises: (i) DIET or an aerosol-generating material comprising DIET, and (ii) optionally one or more additional aerosol-generating materials, and the total amount of aerosol-forming agent present in the aerosol-generating composition (or blend) may be 4 to 30 wt% (DWB) of the composition (or blend), such as 5 to 25 wt% (DWB), 5 to 20 wt% (DWB), or 10 to 20 wt% (DWB). In these embodiments, the dry weight basis (DWB) refers to the entire composition (or blend) excluding any water, and may include components that are themselves liquid at room temperature and pressure, such as glycerol.

[0177] The aerosol-generating material may be present on or in a support to form a substrate. For example, the support may be or include paper, cardboard, paperboard, recycled material, plastic material, ceramic material, composite material, glass, metal, or metal alloy. In some embodiments, the support includes a susceptor. In some embodiments, the susceptor is embedded in the material. In some alternative embodiments, the susceptor is located on one or both sides of the aerosol-generating material.

[0178] A susceptor is a material that can be heated by being penetrated by a varying magnetic field, such as an alternating magnetic field. The susceptor can be a conductive material, such that penetration of the material with the varying magnetic field causes induction heating of the heated material. The heated material can be a magnetic material, such that penetration of the material with the varying magnetic field causes magnetic hysteresis heating of the heated material. The susceptor can be both conductive and magnetic, allowing the susceptor to be heated by both heating mechanisms. A device configured to generate a varying magnetic field is referred to herein as a magnetic field generator.

[0179] In some embodiments, the delivery system is a non-aerosol delivery system that delivers at least one substance to the user orally, nasally, transdermally, or in another manner without forming an aerosol, including but not limited to: lozenges, chewing gum, patches, products containing inhalable powders, and oral products (such as oral tobacco including snuff or moist snuff), wherein the at least one substance may or may not contain nicotine.

[0180] In some embodiments, tobacco extracts can be prepared from DIET materials processed as described herein. In some embodiments, the extract can be a liquid, such as an aqueous extract. In other embodiments, the extract can be produced by supercritical fluid extraction.

[0181] Thus, in one aspect there is provided a method for making a tobacco extract from a DIET tobacco material that has been treated by the methods described herein.

[0182] In some embodiments, the extract can be used in a non-flammable aerosol supply system or an aerosol-free delivery system. For example, the tobacco extract can be heated to produce an inhalable vapor in an electronic cigarette or similar device. Alternatively, the extract can be added to tobacco or another material used for heating, such as in heat-not-burn products.

[0183] As provided above, the favorable changes in the organoleptic properties of the DIET tobacco provided by the methods herein mean that the treated tobacco can be added to a tobacco blend (e.g., for use in a non-flammable aerosol supply system or aerosol-free delivery system), or to an aerosol-generating material or consumable for use in a non-flammable aerosol supply system, in higher amounts than untreated DIET tobacco without compromising the organoleptic properties of the tobacco blend, aerosol-generating material, or consumable. Thus, the methods described herein may further comprise incorporating the treated tobacco into the blend.

[0184] In some embodiments, the tobacco blend can comprise treated tobacco in an amount of 1 to 40 wt%, relative to the total weight of the blend, such as 5 to 35 wt%, 5 to 30 wt%, 10 to 27 wt%, 12.5 to 25 wt%, or 15 to 25 wt%.

[0185] The blend may further comprise one or more other tobacco varieties, optionally including one or more Virginia tobaccos, one or more Burley tobaccos, one or more Oriental tobaccos, and combinations thereof. The treated dry ice expanded tobacco may promote a rich flavor profile, allowing the blend to contain less Burley tobacco varieties while still providing a sufficiently rich taste.

[0186] In a particular embodiment, in addition to the dry ice expanded tobacco processed, relative to the blend gross weight, the blend can further include a total amount of 30wt% or one or more burley tobacco varieties, such as 25wt% or less, 20wt% or less or 15wt% or less. For example, the blend can further include a total amount of 1 to 30wt%, 1 to 25wt% (such as 2 to 20wt%, 3 to 15wt% or 5 to 10wt%). In addition to the dry ice expanded tobacco processed, relative to the blend gross weight, the blend can further include a total amount of up to 55wt%, such as 1 to 55wt%, 1 to 50wt%, 10 to 40wt% or 15 to 35wt% of one or more Virginia tobacco varieties. In addition to the dry ice expanded tobacco processed, relative to the blend gross weight, the blend can further include a total amount of up to 35wt%, such as 1 to 35wt%, 1 to 30wt%, 2 to 25wt% or 5 to 20wt% of one or more Oriental tobacco varieties. These amounts do not include any Virginia, Burley, or Oriental tobacco within the processed dry ice expanded tobacco itself.

[0187] In order to solve various problems and promote the development of this field, the overall disclosure shows various embodiments by way of example, wherein the invention claimed is a method for processing tobacco that can be carried out and provides an excellent method. The advantages and features of the present disclosure are only representative samples of embodiments and are not exhaustive and / or exclusive. These are presented only to help understand and teach the features claimed. It should be understood that the advantages, embodiments, examples, functions, features, structures and / or other aspects of the present disclosure should not be regarded as limitations on the disclosure defined in the claims or limitations equivalent to the claims, and other embodiments may be utilized and modified without departing from the scope and / or spirit of the present disclosure. Various embodiments may suitably include, consist of or consist essentially of various combinations of disclosed elements, components, features, parts, steps, members, etc. In addition, the present disclosure contains other inventions that are not currently claimed but may be claimed in the future.

[0188] Example

[0189] Test Method A

[0190] In the following examples, the filling value of tobacco was measured according to the following method.

[0191] The diameter of 15g tobacco material sample being put into densitometer is the cylinder of 60mm, and with the piston of 2.90 ± 0.03kg tobacco material is compressed 30 seconds subsequently.Measure the height of piston and the water content of sample in the densitometer.Calculate the filling value of sample according to the following formula.

[0192] The volume occupied by the tobacco material when compressed is determined using Equation 1:

[0193]

[0194] r = radius of the cylinder (cm)

[0195] h = measured height (mm)

[0196] The fill value is then determined using the measured volume and mass of tobacco material according to Equation 2:

[0197]

[0198] The fill value is corrected to account for water content using Equation 3:

[0199]

[0200] FV0 = water content M o % Fill Value

[0201] FV = Filling value (cm2) measured at a water content of M% 3 / 10g)

[0202] M o =13.5% (target moisture content)

[0203] M = actual moisture content of tobacco material (%)

[0204] 0.8 = constant

[0205] The moisture content (oven volatiles) is measured as the reduction in mass when the sample is dried for three hours ± 0.5 minutes in a forced draft oven at a temperature adjusted to 110° C. ± 1° C. After drying, the sample is cooled to room temperature in a desiccator for approximately 30 minutes to allow the sample to cool.

[0206] Example 1

[0207] Production of DIET tobacco

[0208] Leaf Virginia and Burley tobaccos are conditioned, blended, cut and dried.

[0209] The tobacco material is then formed into dry ice expanded tobacco. Cut Virginia tobacco is moistened with cut Burley tobacco. With respect to the following sample R, Virginia tobacco is then blended with Burley tobacco. The moistened and optionally blended tobacco material has a moisture content of about 26%. The tobacco material is then fed into an impregnator container and subsequently filled with carbon dioxide under pressure at a temperature of -20°C for about 6 minutes. The impregnated tobacco material is fed into a sublimator and subsequently the pressure is reduced so that the liquid carbon dioxide is solidified. The impregnated tobacco material is then heated in an air flow at a temperature of 330°C, which causes the rapid volatilization of moisture and carbon dioxide in the tobacco material.

[0210] Sample A below is dry ice expanded leaf Virginia tobacco. Sample R below is a 1:1 w / w blend of dry ice expanded leaf Virginia tobacco and Burley tobacco.

[0211] Production of expanded tobacco stems

[0212] Tobacco stems obtained by green leaf threshing are moistened to a moisture content of 25-35% and then cut into cut widths of 25-28 CPI. The cut stems are then expanded by steam treatment involving heating to a temperature of 180-250°C for 15 seconds to 3 minutes, which causes the water in the tobacco cells to evaporate and the tobacco to expand. After steam treatment, the tobacco stems have a moisture content of 13-14%.

[0213] Tobacco processing

[0214] 80kg of DIET tobacco is packed in polyethylene lined The tobacco was packed in single-wall cardboard boxes having outer dimensions of 0.835 m x 1.120 m x 0.765 m and placed for a period of at least 30 days before being exposed to ambient processing conditions of 60° C. and 60% relative humidity and a processing time of 35 days, 37 days or 39 days (for Sample A) or 35 days (for Sample R). The bulk density of the tobacco before treatment was about 123 kg / m 3 .

[0215] 70kg expanded stems are packed in polyethylene lined The pellets were packed in C-48 boxes and placed for a minimum period of 30 days before being exposed to ambient processing conditions, which were 60° C. and 60% relative humidity with a processing time of 14 days, 21 days, or 28 days.

[0216] Taste evaluation

[0217] Cigarettes containing untreated DIET, untreated expanded stems, treated DIET, or treated expanded stems were produced. A blind smoking test was then conducted with professional smokers. No significant difference in flavor was observed for the treated expanded stems compared to the untreated expanded stems. However, an increase in the spicy flavor of the treated DIET (both Sample A and Sample R) was observed compared to the untreated DIET. An increase in the tannic flavor of the DIET was also observed for the treated Sample R compared to the untreated control.

[0218] Thus, unlike other forms of expanded tobacco (expanded stems), the flavor properties of DIET tobacco are unexpectedly improved by this treatment.

[0219] Analysis of fill values

[0220] Fill values ​​of DIET tobacco were measured before and after treatment. The values ​​were corrected to adjust for moisture content and the values ​​quoted are referenced to a moisture content of 13.5%.

[0221] Table 1: Filling Values ​​for Treated and Untreated DIET Tobacco Sample A

[0222] Processing duration (days) <![CDATA[At a filling value of 13.5% moisture (cm 3 / g)]]> 0 (control) 7.019 35 7.242 37 7.355 39 7.445

[0223] Sample R

[0224] Processing duration (days) <![CDATA[At a filling value of 13.5% moisture (cm 3 / g)]]> Batch 1 0 (control) 7.55 Batch 1 35 7.832 Batch 2 0 (control) 7.134 Batch 2 35 7.674 Batch 3 0 (control) 7.358 Batch 3 35 7.445

[0225] Nicotine analysis

[0226] The nicotine content of the treated tobacco was analyzed by colorimetry (continuous flow analysis using an AutoAnalyzer 3 machine). Table 2 provides the results of the analysis.

[0227] Table 2: Nicotine Content of Treated and Untreated Tobacco Sample A

[0228] Processing duration (days) Nicotine%(DWB) 0 (control group) 2.37 35 2.01 37 2.02 39 1.9

[0229] Sample R

[0230] Processing duration (days) Nicotine%(DWB) Batch 1 0 (control group) 2.66 Batch 1 35 2.38 Batch 2 0 (control group) 2.722 Batch 2 35 2.436 Batch 3 0 (control group) 2.735 Batch 3 35 2.445

[0231] As can be seen in Table 2, the tobacco material contained reduced amounts of nicotine after treatment compared to before treatment.

[0232] Sugar analysis

[0233] The total sugar content of the treated tobacco was analyzed by colorimetric determination of all reducing substances and sucrose. This colorimetric method was performed using an AutoAnalyzer 3 machine for continuous flow analysis. Table 3 provides the results of the analysis.

[0234] Table 3: Sugar content of treated and untreated tobacco Sample A

[0235] Processing duration (days) Total Sugars %(DWB) 0 (control) 16.2 35 6.5 37 6.4 39 5.3

[0236] Sample R

[0237] Processing duration (days) Total Sugars %(DWB) Batch 1 0 (control) 7.80 Batch 1 35 2.00 Batch 2 0 (control) 6.6 Batch 2 35 2.1 Batch 3 0 (control) 7.3 Batch 3 35 2

[0238] The results in Table 3 show that the tobacco contained reduced amounts of sugars after treatment compared to before treatment.

[0239] Moisture analysis

[0240] To support the theory that the sugar content in the tobacco material is reduced, the moisture content before and after processing was analyzed. Because the tobacco material is wrapped in a humectant, no water is introduced into the tobacco material from the environment. Therefore, it is believed that the increase in water / moisture observed after processing is due to the reduction in sugars in the tobacco material.

[0241] Table 4: Moisture Analysis (measured as Oven Volatiles (OV)) Sample A

[0242] Processing duration (days) Moisture (%) 0 (control) 12.33 35 14.9 37 14.56 39 13.16

[0243] Sample R

[0244] Processing duration (days) Moisture (%) Batch 1 0 (control) 11.96 Batch 1 35 13.55 Batch 2 0 (control) 11.47 Batch 2 35 13.36 Batch 3 0 (control) 12.48 Batch 3 35 13.05

[0245] Amino acid analysis

[0246] Analysis of the treated tobacco using ultra-high pressure liquid chromatography (UPLC) with a Q-TOF (quadrupole time-of-flight) analyzer showed a significant decrease in amino acid content, as indicated by the data shown in Table 5 below.

[0247] Table 5: Analysis of amino acid content

[0248] Sample A

[0249] Processing duration (days) Total amino acids (abundance / arbitrary unit) 0 (control) 78.39 35 47.67 37 43.09 39 46.26

[0250] Sample R

[0251] Processing duration (days) Total amino acids (abundance / arbitrary unit) Batch 1 0 (control) 88.75 Batch 1 35 70.72 Batch 2 0 (control) 89.05 Batch 2 35 64.34 Batch 3 0 (control) 90.05 Batch 3 35 65.42

[0252] Analysis of carotenoids

[0253] Analysis of the treated tobacco showed a significant increase in carotenoid content, as indicated by the data shown in Table 6 below.

[0254] Table 6: Analysis of carotenoids

[0255] Sample A

[0256] Processing duration (days) Carotenoids (abundance / arbitrary unit) 0 (control) 22.01 35 38.42 37 37.78 39 36.53

[0257] Sample R

[0258] Processing duration (days) Carotenoids (abundance / arbitrary unit) Batch 1 0 (control) 21.01 Batch 1 35 35.80 Batch 2 0 (control) 19.56 Batch 2 35 37.00 Batch 3 0 (control) 17.98 Batch 3 35 34.20

[0259] Example 2

[0260] Leaf Virginia tobacco was treated by the method described in Example 1 for Sample A for 39 days. After treatment, the temperature of the DIET tobacco was 64°C. The tobacco temperature was then gradually lowered to 22°C during a 40-day stabilization period. Large clumps of tobacco were observed within the treated DIET material. The properties of the tobacco after the stabilization period are shown in the table below (Test 1).

[0261] After the stabilization period, the DIET tobacco had a moisture content (OV) of 14% and a filling value of 6.8 cc / g. The proportion of tobacco that did not pass through the sieve with an aperture of 2.5 cm x 2.5 cm was 40 wt%.

[0262] In the following test 2, immediately after treatment, the tobacco material was passed through a first set of doffer rollers in the form of rollers, the first set of doffer rollers including a plurality of rods protruding from its surface, and then passed through a second set of doffer rollers in the form of rollers, the second set of doffer rollers including a plurality of rods protruding from its surface. The spacing between the protruding rods on the first set of doffer rollers was greater than the spacing between the protruding rods on the second set of doffer rollers. In the following test 3, the tobacco material was passed through the second set of doffer rollers for a second time. In the following test 4, the tobacco material was passed through the second set of doffer rollers for a third time. The cooling time for tests 2-4 was 30 minutes or less. Figure 4 Processed DIET is shown passing through a set of doffer rollers.

[0263]

[0264] *Mass percentage of processed DIET material that did not pass through a 2.5 cm x 2.5 cm sieve

[0265] Cigarettes containing untreated DIET, untreated expanded stems, treated DIET, or treated expanded stems were produced. Blind smoking trials were then conducted with professional smokers. The panel of professional smokers determined that the sensory profiles of the cigarettes containing the tobacco produced in Tests 2, 3, and 4 were not significantly different from those of the control sample (the cigarette containing the tobacco produced in Test 1).

[0266] Example 3

[0267] The following tobacco blends were made by mixing an aerosol-generating material (Component H), Virginia, Burley, and Oriental tobacco varieties, and either conventional dry ice expanded tobacco (which had not been subjected to the treatment methods described herein) or dry ice expanded tobacco treated according to the procedure described in Example 2. Component H was a gel comprising, calculated on a dry weight basis, 35 wt% glycerin, 9 wt% carboxymethyl cellulose, 47 wt% powdered cellulose, and 9 wt% wood pulp, which was formed by casting and drying a slurry comprising the above components and water, and drying the slurry.

[0268]

[0269]

[0270] The blend was incorporated into an article and heated in a commercially available GLO HYPER X2 tobacco heating device. The heating profile involved a 4 minute heating period at 240°C and 20 seconds to first puff.

[0271] The sensory properties of the generated aerosol were evaluated three times by eight panelists using a sequential single test method. Blend 2 provided improved sensory properties of lower irritation and less mouth drying, even though Blend 2 contained a higher proportion of dry ice expanded tobacco than Blend 1. Despite the lower content of Burley tobacco varieties in Blend 2, at least equivalent rich flavor was observed.

[0272] Toxicant levels (measured as % reduction relative to the amount of toxicants produced by standardized TobReg 9 cigarettes) were also assessed.

[0273]

[0274]

[0275] The abbreviation NR means Not Recorded.

[0276] Inclusion of treated dry ice expanded tobacco in Blend 2 resulted in a greater reduction in the levels of NNN compared to the control sample.

Claims

1. A method for producing dry ice expanded tobacco for use in a non-flammable aerosol delivery system or a non-aerosol delivery system, the method comprising exposing dry ice expanded tobacco enclosed in a moisture retaining material to an ambient processing temperature above 45°C, wherein: The tobacco material has a mass content of 60 to 160 kg / m at the start of the process. 3 and has a bulk density of about 10% to 23% moisture content before and during processing.

2. The method according to claim 1, wherein The tobacco material has a mass fraction of 90 to 135 kg / m at the start of the process. 3 The bulk density.

3. The method according to claim 2, wherein: The tobacco material has a mass fraction of 100 to 130 kg / m at the start of the process. 3 The bulk density.

4. A method according to any one of the preceding claims, wherein The dry ice expanded tobacco includes leaf tobacco.

5. The method according to claim 4, wherein The lamina tobacco comprises Virginia tobacco, for example, wherein the lamina tobacco is Virginia tobacco or a blend of Virginia tobacco and Burley tobacco.

6. The method according to claim 4 or claim 5, wherein: The dry ice expanded tobacco consists of, or consists essentially of, the folium tobacco.

7. A method according to any one of the preceding claims, wherein The treated tobacco material has a thickness of at least 6 cm at 13.5% moisture. 3 / g's fill value.

8. The method of any preceding claim, comprising dry ice expansion of tobacco material prior to exposing the dry ice expanded tobacco to the ambient processing temperature to provide the dry ice expanded tobacco.

9. A method according to any one of the preceding claims, wherein The tobacco material has a moisture content of about 10% to 15.5% before and during processing.

10. A method according to any one of the preceding claims, wherein The tobacco material is exposed to the ambient processing temperature for a period of 5 to 65 days.

11. A method according to any one of the preceding claims, wherein The microbial content of the treated tobacco material is lower than the microbial content of the untreated tobacco material.

12. A method according to any one of the preceding claims, wherein The temperature of the tobacco material reaches the ambient processing temperature in about 4 to 10 days.

13. A method according to any one of the preceding claims, wherein The temperature of the tobacco material reaches a second temperature that is higher than the ambient processing temperature, e.g. Wherein, the second temperature is at least 2° C. higher than the ambient processing temperature.

14. The method according to claim 13, wherein The second temperature is reached in about 7 to 13 days.

15. A method according to any one of the preceding claims, wherein The method results in a reduction in the level of at least one compound selected from the group consisting of nicotine, reducing sugars, non-reducing sugars, and amino acids in the treated tobacco material.

16. A method according to any one of the preceding claims, wherein The process does not substantially involve fermentation.

17. A method according to any one of the preceding claims, wherein For ambient processing temperatures of about or above 100°C, the ambient processing humidity is about 50-500 g water / m 3 For an ambient processing temperature of about 90°C, the ambient processing humidity is about 50-340g water / m 3 For an ambient processing temperature of about 80°C, the ambient processing humidity is about 50-230g water / m 3 For an ambient processing temperature of about 70°C, the ambient processing humidity is about 50-160g water / m 3 For an ambient processing temperature of about 60°C, the ambient processing humidity is about 50-110g water / m 3 , or for an ambient processing temperature of about 55°C, the ambient processing humidity is about 40-80g water / m 3 .

18. A method according to any one of the preceding claims, wherein The moisturizing material is wrapped around the tobacco material, for example, wherein the moisturizing material comprises a flexible polymeric material, for example, wherein the flexible polymeric material comprises polyethylene.

19. A method according to any one of the preceding claims, wherein The tobacco material is placed in a chamber to control the ambient process temperature and / or ambient relative process humidity.

20. The method of any preceding claim, further comprising breaking up any lumps of tobacco material formed during the dry ice expanded tobacco processing.

21. The method of claim 20, comprising passing the processed DIET over one or more rollers comprising a plurality of teeth, spikes and / or raised bars on its surface.

22. A method according to any one of the preceding claims, wherein During the method, the dry ice expanded tobacco reaches a temperature ("TX") equal to or greater than the ambient processing temperature, and wherein the dry ice expanded tobacco is subsequently cooled from the temperature ("TX") to a temperature of 30°C or less, e.g., from about 18°C ​​to about 30°C, from about 20°C to about 25°C, or about 22°C, over a time period of 0.05 to 3 hours, e.g., from 0.1 to 2 hours, e.g., from 0.15 to 1 hour or from 0.2 to 0.7 hours.

23. Treated dry ice expanded tobacco obtainable by the method of any one of the preceding claims.

24. An aerosol-generating material for use in a non-flammable aerosol delivery system, the aerosol-generating material comprising the processed dry ice-expanded tobacco material of claim 23.

25. A consumable for use in a non-flammable aerosol delivery system, the consumable comprising the processed dry ice expanded tobacco of claim 23 or the aerosol generating material of claim 24.

26. A non-flammable aerosol delivery system comprising the processed dry ice expanded tobacco material of claim 23, the aerosol generating material of claim 24 or the consumable product of claim 25.

27. Use of the treated dry ice expanded tobacco material of claim 23 for the manufacture of an aerosol generating material for use in a non-flammable aerosol supply system or a consumable for use in a non-flammable aerosol supply system; or for the manufacture of an aerosol-free delivery system.

28. An aerosol-free delivery system comprising the processed dry ice-expanded tobacco material of claim 23.

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