Inductively heated tobacco products

Abstract

To provide an inductively heatable tobacco product optimized for aerosol generation.SOLUTION: The inductively heatable tobacco product for aerosol generation comprises an aerosol-forming substrate containing a susceptor in the form of a plurality of particles. The aerosol-forming substrate is a crimped tobacco sheet comprising a tobacco material, fibers, a binder, an aerosol former, and the susceptor in the form of the plurality of particles.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an inductively heatable tobacco product for aerosol generation. The tobacco product is particularly suitable for use in an inductive heating device for aerosol generation.

Background Art

[0002] In an electrically heatable smoking device, for example, a tobacco plug made of a tobacco sheet containing tobacco particles and glycerin as an aerosol former is heated by a heatable blade. In use, the tobacco plug is pushed onto the blade such that the plug material is in thermal contact with the heated blade. In an aerosol generating device, the tobacco plug is heated to vaporize the volatile compounds in the plug material, preferably without burning the tobacco as in a conventional cigarette. However, in order to heat the peripheral region of the plug away from the blade to generate an aerosol, the material closest to the heating blade must be overheated so that combustion of the tobacco near the blade is not completely prevented.

[0003] The use of inductive heating for an aerosol forming substrate has been proposed. Also, dispersing individual susceptor materials within the tobacco material has been proposed. However, no solution for optimal heating of a tobacco plug made of a crimped tobacco sheet has been proposed so far.

[0004] Therefore, there is a need for an inductively heatable tobacco product optimized for aerosol generation. In particular, there is a need for a tobacco product that allows for optimal aerosol generation of a tobacco plug made of an aerosol former containing a crimped tobacco sheet.

Summary of the Invention

[0005] According to one aspect of the present invention, an inductively heatable tobacco product for generating an aerosol is provided. The tobacco product comprises an aerosol-forming substrate containing susceptors in the form of multiple particles. The aerosol-forming substrate is a crimped tobacco sheet containing tobacco material, fibers, a binder, an aerosol-forming body, and susceptors in the form of multiple particles. The susceptors in the tobacco product have the ability to convert energy transmitted as magnetic waves into heat (referred to herein as thermal loss). The greater the thermal loss, the more energy transmitted as magnetic waves to the susceptor is converted into heat by the susceptor. The thermal loss is preferably 0.008 joules / kilogram or more, and preferably 0.05 joules / kilogram, and preferably 0.1 joules / kilogram or more during a single sinusoidal cycle applied to a circuit provided to induce the susceptor. By changing the frequency of the circuit, the thermal loss per kilogram per second can be changed. Typically, a high-frequency current is supplied by a power source and flows through an inductor to induce the susceptor. The frequency within the inductor or circuit can be in the range of 1 MHz to 30 MHz, preferably in the range of 1 MHz to 10 MHz or 1 MHz to 15 MHz, and more preferably in the range of 5 MHz to 7 MHz. When the term "range of ~" is used herein and below, the respective boundary values ​​are also understood to be explicitly disclosed.

[0006] In a preferred embodiment, the tobacco product according to the present invention has a heat loss of at least 0.008 joules / kilogram. The heat loss can be achieved during a single cycle applied to the circuit, which is provided to induce a susceptor, and the circuit preferably has a frequency in the range of 1 MHz to 10 MHz.

[0007] Alternatively, if the minimum wattage or joules per second is known based on the composition and size of the substrate, the susceptor may be provided in the substrate as a weight percentage sufficient to enable the desired minimum wattage.

[0008] As described above, heat loss is the capacity of the susceptor to transfer heat to the surrounding material. Heat is generated within the susceptor in the form of multiple particles. The susceptor primarily conductively heats the tobacco material and aerosol-forming material that are in close contact with or near it, thereby developing the desired flavor. Thus, heat loss is determined by the material and by the susceptor's contact with its surroundings. In the tobacco product according to the present invention, it is preferable that the susceptor particles are uniformly distributed within the aerosol-forming substrate. This allows for uniform heat loss within the aerosol-forming substrate, thus creating a uniform heat distribution within the aerosol-forming substrate and within the tobacco product, leading to a uniform temperature distribution within the tobacco product.

[0009] A uniform or homogeneous temperature distribution in a tobacco product is understood herein as a tobacco product having a substantially similar temperature distribution throughout its cross-section. It is preferable that the tobacco product be heated such that the temperature difference between different regions of the tobacco product, for example, the central and peripheral regions of the tobacco product, is less than 50 percent, preferably less than 30 percent.

[0010] It has been found that tobacco products can be heated to a substantially uniform temperature at which adequate aerosol generation is provided, with a minimum heat loss of 0.05 joules / kilogram per unit area. The average temperature of the tobacco product is preferably about 200°C to 240°C. This has been found to be the temperature range at which a desirable amount of volatile compounds are generated, particularly in tobacco sheets made of homogenized tobacco material containing glycerin as an aerosol former, and especially in cast leaves, which will be described in more detail below. At these temperatures, there is no substantial overheating in individual areas of the tobacco product, although the susceptor particles can reach temperatures of up to about 400–450°C.

[0011] The susceptor particles are embedded within the tobacco sheet and thus embedded within the aerosol-forming substrate. The particles are immobilized and remain in their initial positions. The particles can be embedded on or within the tobacco sheet. It is preferable that the particles are uniformly distributed within the aerosol-forming substrate. By embedding the susceptor particles within the substrate, the uniform distribution is maintained even during tobacco product formation by crimping the tobacco sheet and forming the tobacco product. For example, a rod can take the form of a crimped tobacco sheet, and the rod can be cut to the required rod length for the tobacco product.

[0012] The tobacco sheet is preferably a cast leaf. A cast leaf is a form of reconstituted tobacco, formed from a slurry that includes tobacco particles, fiber particles, an aerosol former, a binder, and, for example, flavorings.

[0013] Tobacco particles can take the form of tobacco dust, having particles of approximately 30 to 250 micrometers, preferably approximately 30 to 80 micrometers, or approximately 100 to 250 micrometers, depending on the desired sheet thickness and casting gap, where the casting gap typically defines the sheet thickness.

[0014] The fiber particles may include tobacco stem material, stalks, or other tobacco plant material, as well as other cellulosic fibers (such as wood fibers with low lignin content). The fiber particles may be selected as required to provide sufficient tensile strength to the castleaf at low concentrations (e.g., approximately 2–15%). Alternatively, other fibers (such as plant fibers) may be used with or as substitutes for the aforementioned fiber particles, including hemp and bamboo.

[0015] Aerosol-forming materials contained in the slurry that forms the cast leaf can be selected based on one or more properties. Functionally, aerosol-forming materials provide a mechanism to vaporize and carry nicotine, flavoring agents, or both within the aerosol when heated above a specific vaporization temperature of the aerosol-forming material. Different aerosol-forming materials typically vaporize at different temperatures. Aerosol-forming materials can be selected based on their ability to vaporize at higher temperatures, such as 40°C to 450°C, while remaining stable at or near room temperature. Aerosol-forming materials can also have a wetting type attribute, which helps maintain a desired level of moisture within the aerosol-forming substrate when the substrate consists of tobacco-derived products containing tobacco particles. In particular, some aerosol-forming materials are water-absorbing materials that act as wetting agents, i.e., materials that help keep substrates containing wetting agents moist.

[0016] One or more aerosol-forming materials can be combined to utilize one or more attributes of the combined aerosol-forming materials. For example, triacetin can be combined with glycerin and water to utilize the ability of triacetin to transport active ingredients and the wetting properties of glycerin.

[0017] The aerosol-forming body can be selected from polyols, glycol ethers, polyol esters, esters, and fatty acids, and may also contain one or more compounds such as glycerin, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triacetin, meso-erythritol, diacetin mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzylphenyl acetate, ethyl vanillin phosphate, tributyline, lauryl acetate, lauric acid, myristic acid, and propylene glycol.

[0018] A standard process for manufacturing cast leaf includes a tobacco preparation step. For this purpose, the tobacco is finely chopped. The chopped tobacco is then mixed with and ground with other types of tobacco. Typically, the other types of tobacco are other types of tobacco such as Virginia or Burley, or tobacco processed in a different way, for example. The mixing and grinding steps can be switched. The fibers are preferably prepared separately and used for a slurry in the form of a solution. The solution and prepared tobacco are then mixed, preferably with susceptor particles. To form the cast leaf, the slurry is moved to a sheet forming apparatus. This can be, for example, the surface of a continuous belt, on which the slurry can be spread continuously. The slurry is distributed on the surface to form a sheet. The sheet is then preferably heat-dried and cooled after drying. Susceptor particles may also be applied to the slurry after it has been formed into a sheet, but before the sheet is dried. This ensures that the susceptor particles are uniformly distributed inside the sheet material, but also uniformly distributed within the tobacco product formed by the compression of the tobacco sheets. Before the cast leaf is wound onto a bobbin for future use, the ends of the cast leaf may be trimmed, and the sheet may be cut into strips. However, slitting may also be performed after the sheet has been wound onto the bobbin. The bobbin can then be moved to sheet processing equipment, such as a crimping and rod forming unit, or it can be placed in a bobbin storage facility for future use.

[0019] The thickness of the crimped tobacco sheet (e.g., cast leaf) can range from about 0.5 mm to about 2 mm, but is preferably in the range of about 0.8 mm to about 1.5 mm, for example, 1 mm. A thickness deviation of up to about 30 percent may occur due to manufacturing tolerances.

[0020] A susceptor is a conductor that can be inductively heated. A susceptor can absorb electromagnetic energy and convert it into heat. In the tobacco product according to the present invention, the susceptor is heated by changing the electromagnetic field generated by one or more induction coils of an induction heating device, which then transfers the heat to the aerosol-forming substrate of the tobacco product, primarily by thermal conduction. For this purpose, the susceptor is thermally close to the tobacco material and the aerosol-forming body of the aerosol-forming substrate. Due to the nature of the susceptor as a fine particle, heat is generated according to the distribution of particles within the tobacco sheet.

[0021] In some preferred embodiments of the tobacco product according to the present invention, the tobacco material is homogenized tobacco material, and the aerosol-forming body contains glycerin. The tobacco product is preferably made of cast leaf as described above.

[0022] Furthermore, it has been found that only specific susceptor particles having specific properties are suitable when combined with a tobacco product that is made of a compressed tobacco sheet containing an aerosol-forming body, and more particularly made of compressed cast leaf, and preferably contains glycerin as the aerosol-forming body, in order to provide sufficient heat for optimal aerosol formation, but preferably without combustion of tobacco or fibers.

[0023] By optimizing the selection and distribution of particles within the tobacco sheet, the energy required for heating can be reduced. However, sufficient energy is still supplied to release volatile compounds from the substrate. This energy reduction not only decreases the energy consumption of induction heating devices used for aerosol generation in conjunction with tobacco products, but also reduces the risk of overheating of the aerosol-generating substrate. Energy efficiency is also achieved by achieving very uniform and complete depletion of aerosol-forming materials within the tobacco product. In particular, the surrounding area of ​​the tobacco product can also contribute to aerosol formation. This allows tobacco products such as tobacco plugs to be used more efficiently. For example, by evaporating the same amount of volatile compounds from the tobacco product as would be found in conventionally heated or larger aerosol-forming substrates, the smoking experience can be improved, or the size of the tobacco product can be reduced. This can lead to cost savings and reduced waste.

[0024] According to one embodiment of the tobacco product according to the present invention, the size of the susceptor particles is preferably in the range of about 5 micrometers to about 100 micrometers, and also in the range of about 10 micrometers to about 80 micrometers, for example, in the range of 20 micrometers to 50 micrometers. These size ranges for particles used as susceptors have been found to be the optimal range for allowing uniform distribution within the tobacco sheet. Particles that are too small are undesirable due to the skin effect, which prevents small particles from efficiently generating heat. Furthermore, smaller particles may pass through conventional filters when used in smoking articles. Such filters can also be used in combination with the tobacco product according to the present invention. Larger particles make uniform distribution within the sheet material difficult or impossible, particularly in tobacco products formed by the compression of tobacco sheets. Larger particles may not be distributed as finely within the tobacco sheet as smaller particles. Furthermore, larger particles tend to protrude from the tobacco sheet to come into contact with each other during compression. This is undesirable because it results in localized heat generation. In this specification, particle size is understood to mean equivalent spherical diameter. Since particles can have irregular shapes, equivalent spherical diameters define the spherical diameters of equivalent volumes as irregularly shaped microparticles.

[0025] According to another embodiment of the tobacco product according to the present invention, the amount of multiple particles is in the range of about 4 to about 45 weight percent of the tobacco product, preferably about 10 to about 40 weight percent, for example, 30 weight percent. Herein, it will be apparent to those skilled in the art that while various weight percents of susceptor are provided above, changing the composition of the elements comprising the tobacco product, including its weight percent of tobacco, aerosol formizer, binder, and water, will necessitate adjusting the weight percent of susceptor required to effectively heat the tobacco product.

[0026] The amount of susceptor particles within these weight ranges, compared to the weight of the tobacco product, has been found to be in an optimal range to provide a uniform heat distribution across the entire tobacco product. Further, these weight ranges of susceptor particles are in an optimal range to provide sufficient heat to heat the tobacco product uniformly and to an average temperature, for example, a temperature between 200 degrees Celsius and 240 degrees Celsius.

[0027] According to another aspect of the tobacco product according to the present invention, the particles comprise or are made from a sintered material. The sintered material provides a wide variety of electrical, magnetic, and thermal attributes. The sintered material can be of a ceramic, metallic, or plastic nature. A metal alloy is preferably used for the susceptor particles. Depending on the manufacturing process, such sintered materials can be tailored to specific specifications. The sintered material for the particles used in the tobacco product according to the present invention preferably has high thermal conductivity and high magnetic permeability.

[0028] According to a further aspect of the tobacco product according to the present invention, the particles have an outer surface that is chemically inert. The chemically inert surface prevents the particles from undergoing chemical reactions or acting as a catalyst for unwanted chemical reactions that may occur, in some cases, when the product is heated. The outer surface of the inert chemical can be the chemically inert surface of the susceptor material itself. The outer surface of the inert chemical can also be a chemically inert cover layer that encapsulates the susceptor material within a chemically inert cover. The cover material can withstand a temperature as high as the temperature at which the particles are heated. The encapsulation process can be incorporated into the sintering process when the particles are manufactured. Chemical inertness is understood herein with respect to the chemicals generated by heating the tobacco product and present within the tobacco product.

[0029] In some preferred embodiments of the tobacco product according to the present invention, the particles are made of ferrite. Ferrite is a ferromagnetic material with high magnetic permeability and is particularly suitable as a susceptor material. The main component of ferrite is iron. Other metal components, such as zinc, nickel, manganese, or non-metal components (e.g., silicon) can be present in various amounts. Ferrite is a relatively inexpensive and commercially available material. Ferrite is available in particulate form within the size range of the particles used in the tobacco product according to the present invention. The particles are preferably fully sintered ferrite powder, such as FP350 manufactured by Powder Processing Technology LLC (USA).

[0030] According to yet a further aspect of the tobacco product according to the present invention, the Curie temperature of the susceptor is preferably from about 200 °C to about 450 °C, from about 240 °C to about 400 °C, for example about 280 °C.

[0031] Particles containing a susceptor material having a Curie temperature within the indicated range can achieve a tobacco product with a somewhat uniform temperature distribution and an average temperature of from about 200 °C to 240 °C. Further, the local temperature of the aerosol-forming substrate generally does not exceed or significantly exceed the Curie temperature of the susceptor. Thus, the local temperature can be below about 400 °C, below which no significant combustion of the aerosol-forming substrate occurs.

[0032] When the susceptor material reaches its Curie temperature, its magnetism changes. At the Curie temperature, the susceptor material changes from a ferromagnetic phase to a paramagnetic phase. At this point, heating due to energy loss caused by the orientation of the ferromagnetic region stops. Subsequent heating is primarily based on the formation of eddy currents, so that the heating process is automatically reduced once the susceptor material reaches its Curie temperature. Reducing the risk of overheating the aerosol-forming substrate can be supported by using a susceptor material with a Curie temperature, which ensures that the heating process due to hysteresis loss only reaches a certain maximum temperature. The susceptor material and its Curie temperature are preferably adapted according to the composition of the aerosol-forming substrate to achieve optimal temperature and temperature distribution within the tobacco product for optimal aerosol generation.

[0033] According to one embodiment of the tobacco product of the present invention, the tobacco product preferably has a rod diameter in the range of about 3 mm to about 9 mm, and preferably a rod shape of about 4 mm to about 8 mm, for example, 7 mm. The length of the rod may be about 2 mm to about 20 mm, but preferably about 6 mm to about 12 mm, for example, 10 mm. The rod preferably has a circular or elliptical cross-section. However, the rod may also have a rectangular or polygonal cross-section.

[0034] To facilitate easy handling of the tobacco rod by the consumer, the rod may be provided within a tobacco stick containing a sequentially formed rod, filter, and mouthpiece. The filter may be made of a material capable of cooling the aerosol formed from the rod material, and may also be capable of altering the components present in the formed aerosol. For example, if the filter is made of polylactic acid or a similar polymer, the filter may remove or reduce the level of phenol in the aerosol. The rod, filter, and mouthpiece may be enclosed in paper that is stiff enough to facilitate handling of the rod. The length of the tobacco stick may be 20 mm to 55 mm, but preferably about 45 mm.

[0035] Therefore, in another aspect of the present invention, a unit is provided which includes tobacco material, such as a tobacco stick, and the unit includes the tobacco product and filter described herein. The tobacco product and filter are aligned end to end and wrapped in a sheet material (e.g., paper) to secure the filter and tobacco product within the unit containing the tobacco material.

[0036] The present invention will be further described in terms of embodiments, which are illustrated by the following diagrams and tables. [Brief explanation of the drawing]

[0037] [Figure 1] Figure 1 is a schematic diagram of a tobacco sheet containing homogenized tobacco material and susceptor particles. [Figure 2] Figure 2 shows a temperature simulation of heating a tobacco plug made from crimped, homogenized tobacco sheets with a heating blade. [Figure 3] Figure 3 shows a temperature simulation of a tobacco plug made from the tobacco sheet shown in Figure 1, which has a uniform susceptor particle distribution. [Figure 4] Figure 4 shows a simulation of the glycerin depletion profile of the tobacco plug based on Figure 2. [Figure 5] Figure 5 shows a simulation of the glycerin depletion profile of the tobacco plug according to Figure 3. [Figure 6] Figure 6 shows a simulation of the average temperature curve over time of a tobacco plug heated by a heating blade and having a uniform susceptor particle distribution, as shown in Figures 2 and 3. [Modes for carrying out the invention]

[0038] Figure 1 schematically shows the aerosol-forming substrate in the form of a tobacco sheet 1. The tobacco sheet contains homogenized tobacco particles 11, preferably cast leaves as described above, and susceptor particles 10.

[0039] The thickness 12 of the tobacco sheet is preferably 0.8 mm to 1.5 mm, while the size of the susceptor particles is preferably 10 micrometers to 80 micrometers. To form the tobacco product according to the present invention, the tobacco sheet 1 is crimped and folded to form a tobacco rod. These continuous rods are then cut to the required size for a tobacco plug to be used in combination with an induction heating device for aerosol generation.

[0040] Figure 2 shows a simulated temperature distribution in the cross-section of a cylindrical tobacco plug 2 heated by a heating blade 20. The tobacco plug contains an aerosol-forming substrate made of a crimped tobacco sheet containing homogenized tobacco material and glycerin as an aerosol-forming agent. The crimped tobacco sheet, formed into a rod shape, is wrapped in a wrapper 23 (e.g., paper). A rectangular resistance-heatable heating blade 20 is inserted into the center of the tobacco plug to heat the aerosol-forming substrate. Figure 2 shows a simulation of the temperature distribution, illustrating the heating of the plug such that the core temperature is approximately 370 degrees Celsius in the center and at least 80 degrees Celsius in the periphery. The temperature in the proximal region 220 of the blade 20 reaches a maximum of approximately 380 degrees Celsius. The temperature in the intermediate region 221 and the distal and peripheral regions 222 remains at a minimum of approximately 100-150 degrees Celsius. Thus, simulation measurements indicate that the intermediate and peripheral regions of the heated tobacco plug blade are not involved in aerosol formation, or are involved only to a limited extent, at least when the heating of the blade is limited so that the tobacco does not burn completely in the proximal region 220.

[0041] This is also illustrated in Figure 4. This figure shows the glycerin depletion of the tobacco plug according to Figure 2. It can be seen that the glycerin is completely depleted in the proximal region 220 after 5 minutes of heating. No depletion occurs in the peripheral region 222, and partial depletion occurs in the intermediate region 221. Due to the rectangular cross-sectional shape of the heating blade, the peripheral region 222, which is free from depletion, is limited to a part of the plug and is located alongside the longer side of the blade 20. The proximal region 220 is located directly adjacent to the heating blade 20 and extends by a maximum of about 1 / 3 of the radius on each of the longer sides of the blade 20.

[0042] Figure 3 shows a simulated diagram of the temperature distribution in the cross-section of an inductively heated cylindrical tobacco plug 3. The tobacco plug is made of a compressed tobacco sheet containing susceptor particles as described in Figure 1. In the tobacco plug used for the temperature simulation, 90 milligrams of FP 350 ferrite particles with an average size of 50 micrometers are uniformly distributed within a cast leaf made of tobacco particles as an aerosol former, fibers, binder, and a glycerin slurry.

[0043] The compressed tobacco sheet, formed into a rod shape, is wrapped by a wrapper 13 (e.g., paper). Susceptor particles are uniformly distributed throughout the tobacco plug (not shown). The plug is heated via the inductively heated susceptor particles. Figure 3 shows a simulation of the temperature distribution, illustrating the heating of the plug at a more uniform temperature than expected based on the uniformly distributed susceptor particles within the plug. The temperature in the central region 110 is approximately 300 degrees Celsius. The circular central region 110 is somewhat large, extending to about half the radius of the tobacco plug. The temperature in the narrow annular intermediate region 111 is approximately 250 degrees Celsius, and the temperature in the circumferentially arranged peripheral region 112 is approximately 200 degrees Celsius. Thus, simulation measurements show that glycerin vaporizes relatively uniformly over the entire or substantially entire region of the tobacco plug. Glycerin also vaporizes from the intermediate region 111 and the peripheral region 112 of the tobacco plug. Thus, all areas of the tobacco plug are used for aerosol formation, even by a maximum heating temperature much lower than the known temperature from the tobacco plug, which is heated centrally and resistively.

[0044] Figure 5 illustrates the glycerin depletion of the tobacco plug in Figure 3. It can be seen that the glycerin in the central region 110 is not yet completely depleted even after 5 minutes of heating. However, some depletion has already occurred in the intermediate region 111, and to a lower degree in the peripheral region 112.

[0045] The temperature and glycerin depletion simulations of the plug shown in Figures 2 and 3 (heating for approximately 1 minute and 1.5 minutes, respectively) show the same relative temperature behavior. After 1 minute, the tobacco plug according to the present invention has already reached a temperature of approximately 150-200 degrees Celsius in the central and intermediate regions. Glycerin depletion has not yet begun. After 1.5 minutes, the temperature has risen to approximately 200 degrees Celsius in the internal peripheral region and to a maximum of approximately 280 degrees Celsius in the central region. A minimum temperature of 150 degrees Celsius exists only in the outer peripheral region 112. Thus, glycerin depletion occurs over a wide area of ​​the tobacco plug as soon as 1-2 minutes after the start of heating.

[0046] In contrast to the tobacco plug with susceptor particles according to the present invention, the temperature distribution of the tobacco plug with a heating blade as shown in Figure 2 is already almost identical to that shown in Figure 2 after 1.5 minutes of heating. After 1.5 minutes of heating, the proximal region 220 already has a maximum temperature of 380 degrees Celsius, and the intermediate and peripheral regions have a minimum temperature of at least approximately 100 degrees Celsius. After 1 minute of heating, only the very narrow proximal region around the heating blade 20 is heated to approximately 200 degrees Celsius. The remaining regions have a slightly higher temperature or remain at room temperature.

[0047] Figure 6 illustrates the average temperature T and the corresponding time t in the tobacco plug volume of the plugs according to Figures 1 and 3. Line 35 shows the temperature curve of the tobacco plug with susceptor particles according to the present invention, and line 25 shows the temperature curve of the tobacco plug heated by a heating blade. The maximum heating temperature of the heating blade was limited to 360 degrees Celsius, but the Curie temperature of the susceptor of the tobacco plug according to the present invention was 350-400 degrees Celsius. In a plug with uniformly distributed particles, the average temperature can be seen to rise much faster, gradually approaching the maximum average temperature of approximately 250 degrees Celsius. The rise in average temperature of a blade-heated tobacco plug takes a little longer. The maximum average temperature in a blade-heated plug is approximately 220 degrees Celsius. Due to the peripheral region not heated by the heating blade, it does not reach an average temperature higher than this.

[0048] 1. A tobacco product that can be inductively heated for aerosol generation, wherein the tobacco product comprises an aerosol-forming substrate comprising a plurality of susceptors in the form of particles, and the aerosol-forming substrate is a compressed tobacco sheet comprising tobacco material, fibers, a binder, an aerosol-forming body, and the plurality of susceptors in the form of particles. 2. The tobacco product according to claim 1, wherein the tobacco product has a heat loss of at least 0.008 joules / kilogram. 3. The tobacco product according to paragraph 2, wherein the heat loss exceeds 0.05 joules / kilogram. 4. A tobacco product according to any one of 1 to 3, wherein the particle size of the plurality of particles is in the range of approximately 5 micrometers to approximately 100 micrometers. 5. The tobacco product according to any one of 1 to 4, wherein the amount of the plurality of particles is in the range of about 4% by weight to about 45% by weight of the tobacco product. 6. The tobacco product according to any one of 1 to 5, wherein the particles are uniformly distributed within the aerosol-forming substrate. 7. The tobacco product according to any one of 1 to 6, wherein the particles include a sintered material. 8. The tobacco product according to any one of 1 to 7, wherein the particles include a chemically inert outer surface. 9. A tobacco product according to any one of 1 to 6, wherein the particles are made of ferrite. 10. The tobacco product according to any one of 1 to 9, wherein the tobacco material is a homogenized tobacco material and the aerosol forming body contains glycerin. 11. A tobacco product according to any one of 1 to 10, wherein the thickness of the crimped tobacco sheet is in the range of approximately 0.5 millimeters and approximately 2 millimeters. 12. A tobacco product according to any one of claims 1 to 11, wherein the Curie temperature of the susceptor is approximately 200 degrees Celsius to approximately 400 degrees Celsius. 13. A tobacco product according to any of 1 to 12, having the form of a rod, wherein the rod diameter is in the range of approximately 3 mm to approximately 9 mm and the rod length is in the range of approximately 2 mm to approximately 20 mm. 14. A tobacco material comprising a unit including a tobacco product and a filter according to any one of 1 to 13, wherein the tobacco product and the filter are arranged end to end, and the unit is wrapped in a sheet material for securing the filter and the tobacco product within the unit including the tobacco material.

Claims

1. An inductively heatable tobacco product for aerosol generation, wherein the tobacco product comprises an aerosol-forming substrate including a susceptor, the susceptor consisting of a plurality of magnetic particles, and the aerosol-forming substrate comprising tobacco material, fibers, a binder, and an aerosol-forming body, and the Curie temperature of the susceptor is between 200 degrees Celsius and 450 degrees Celsius. The amount of the plurality of magnetic particles is in the range of 4% to 45% by weight of the tobacco product. Tobacco products.

2. The tobacco product according to claim 1, wherein the Curie temperature of the susceptor is 240 degrees Celsius to 400 degrees Celsius.

3. The tobacco product according to any one of claims 1 to 2, wherein the amount of the plurality of magnetic particles is in the range of 10 to 40 weight percent of the tobacco product.

4. The tobacco product according to any one of claims 1 to 3, wherein the particle size of the plurality of magnetic particles is in the range of 5 micrometers to 100 micrometers.

5. The tobacco product according to claim 4, wherein the particle size of the plurality of magnetic particles is in the range of 10 micrometers to 80 micrometers.

6. The tobacco product according to any one of claims 1 to 2, wherein the susceptor is uniformly distributed within the aerosol-forming substrate.

7. The tobacco product according to any one of claims 1 to 6, wherein the tobacco product has a heat loss of at least 0.008 joules / kilogram.

8. The tobacco product according to claim 7, wherein the heat loss exceeds 0.1 joules / kilogram.

9. The tobacco product according to any one of claims 1 to 8, wherein the susceptor comprises a sintered material, is made of ferrite, or is made of sintered ferrite.

10. The tobacco product according to any one of claims 1 to 9, wherein the tobacco material is a homogenized tobacco material.

11. The tobacco product according to any one of claims 1 to 10, wherein the aerosol forming body contains glycerin.

12. The tobacco product according to any one of claims 1 to 11, wherein the tobacco material comprises tobacco particles having a size in the range of 30 micrometers to 250 micrometers.

13. A tobacco product according to any one of claims 1 to 12, having the form of a rod in which the diameter of the rod is in the range of 3 millimeters to 9 millimeters and the length of the rod is in the range of 2 millimeters to 20 millimeters.

14. A unit comprising tobacco material, comprising a tobacco product and a filter according to any one of claims 1 to 13, wherein the tobacco product and the filter are arranged such that the ends of the tobacco product and the ends of the filter are in contact, and the filter and the tobacco product are wrapped in a sheet material for fixing them within the unit comprising tobacco material.

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