• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    inductively heatable tobacco product. the inductively heatable aerosol generating tobacco product 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 tobacco material, fibers, binder, aerosol former and the susceptor in the form of the plurality of particles.
    公开号:BR112016017537B1
    申请号:R112016017537-9
    申请日:2015-05-21
    公开日:2021-06-01
    发明作者:Oleg Mironov
    申请人:Philip Morris Products S.A.；
    IPC主号:
    专利说明:

    [001] The invention relates to an inductively heatable tobacco product for aerosol generation. The tobacco product is especially suitable for use in an inductive heating device for aerosol generation.
    [002] In electrically heatable smoking devices, for example, a tobacco plug made from a tobacco leaf 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 so that the plug material is in thermal contact with the heated blade. In aerosol generating devices, the tobacco plug is heated to evaporate volatile compounds in the plug material, preferably without burning the tobacco as in conventional cigarettes. However, in order to heat remote peripheral regions of an aerosol generating plug, the material close to the heater blade must be excessively heated so that tobacco burning in the vicinity of the blade may not be entirely prevented.
    [003] The use of inductive heating for an aerosol forming substrate has been proposed. Dispersion of distinct susceptor material within the tobacco material has also been proposed. However, no solution has been proposed for optimal heating of a tobacco plug made from a crimped tobacco leaf.
    [004] Therefore, there is a need for an inductively heatable tobacco product optimized for aerosol generation. Especially, there is a need for a tobacco product that allows for optimized aerosol generation of a tobacco plug made from an aerosol former containing crimped tobacco sheet.
    [005] According to one aspect according to the invention, an inductively heatable tobacco product for aerosol generation is provided. The tobacco product 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 tobacco material, fibers, binder, aerosol former and the susceptor in the form of the plurality of particles. The susceptor within the tobacco product has the ability to convert energy transferred as magnetic waves into heat, referred to herein as heat loss. The greater the heat loss, the more energy transferred as magnetic waves to the susceptor is converted by the susceptor to heat. Preferably a heat loss of 0.008 Joule per kilogram or more, of more than 0.05 Joule per kilogram, preferably a heat loss of more than 0.1 Joule per kilogram is possible during a single sinusoidal cycle applied to a supply circuit to shake the susceptor. By changing the frequency of the circuit, a heat loss per kilogram per second can be varied. Typically, a high frequency current is supplied by a power source and flows through an inductor to agitate the susceptor. A frequency in an inductor or a circuit, respectively, can be in a range between 1 MHz and 30 MHz, preferably in a range between 1 MHz and 10MHz or 1 MHz and 15 MHz, even more preferably in a range between 5 MHz and 7 MHz. The term 'in a band between' is understood herein and hereinafter as explicitly disclosing the respective threshold values as well.
    [006] In preferred embodiments, the tobacco product according to the invention has a heat loss of at least 0.008 Joule per kilogram. Heat loss can be achieved during a single cycle applied to a circuit, where the circuit is provided for stirring the susceptor and where the circuit preferably has a frequency in the range between 1 MHz and 10 MHz.
    [007] Alternatively, if a minimum power or Joule per second is known based on the composition and size of the substrate, then the susceptor can be supplied within the substrate as a sufficient weight percentage to allow for the desired minimum voltage.
    [008] As discussed above, heat loss is the ability of the susceptor to transfer heat to the surrounding material. Heat is generated in the susceptor in the form of the plurality of particles. The susceptor predominantly conductively heats the close contact of tobacco material and aerosol former to expand the desired aromas. Thus, heat loss is specified by the material and contact of the susceptor around it. In the tobacco product according to the invention, the susceptor particles are preferably homogeneously distributed in the aerosol-forming substrate. Therefore, a uniform heat loss in the aerosol-forming substrate can be achieved, thereby generating a uniform heat distribution in the aerosol-forming substrate and the tobacco product, leading to a uniform temperature distribution in the tobacco product.
    [009] Uniform or homogeneous temperature distribution of the tobacco product is understood herein as a tobacco product having a substantially similar temperature distribution along a cross section of the tobacco product. Preferably, the tobacco product can be heated so that temperatures in different regions of the tobacco product, such as central and peripheral regions of the tobacco product, differ by less than 50 percent, preferably by less than 30 percent.
    It has been found that a minimum specific heat loss of 0.05 Joule per kilogram in the tobacco product allows for heating the tobacco product to a substantially uniform temperature, such temperature providing good aerosol generation. Preferably, average tobacco product temperatures are from about 200°C to about 240°C. This has been found to be a temperature range where desired amounts of volatile compounds are produced, especially in tobacco sheet made of tobacco material homogenized with glycerin as an aerosol former, especially in coated sheet, as will be described in more detail below. At these temperatures, no substantial overheating of the individual regions of the tobacco product is achieved, although the susceptor particles can reach temperatures of up to about 400 to 450°C.
    [0011] Susceptor particles are incorporated in the tobacco sheet and therefore in the aerosol-forming substrate. The particles are immobilized and remain in an initial position. The particles can be incorporated into or within the tobacco sheet. Preferably, the particles are preferably homogeneously distributed in the aerosol-forming substrate. Through the incorporation of the susceptor particles into the substrate, a homogeneous distribution remains homogeneous also through the formation of the tobacco product by crimping the tobacco sheet and in the formation of the tobacco product. For example, a column can be formed from the crimped tobacco sheet, such column can be cut to a required column length of the tobacco product.
    [0012] Preferably, the tobacco sheet is a coated sheet. The coated sheet is a form of reconstituted tobacco which is formed from a paste including tobacco particles, fiber particles, aerosol former, binder and for example also flavorings.
    [0013] Tobacco particles can be in the form of a tobacco powder having particles in the order of 30 micrometers to 250 micrometers, preferably in the order of 30 micrometers to 80 micrometers or 100 micrometers to 250 micrometers, depending on the thickness of the desired sheet and the coating gap, where the coating gap typically defines the thickness of the sheet.
    [0014] Fiber particles may include tobacco stem materials, stalks or other tobacco plant material and other cellulose-based fibers such as wood fibers with a low lignin content. Fiber particles can be selected based on the desire to produce sufficient tensile strength for the coated sheet rate versus low inclusion, for example, an inclusion rate between approximately 2 percent to 15 percent. Alternatively, fibers such as vegetable fibers can be used with the above fiber particles or alternatively including hemp and bamboo.
    [0015] Aerosol formers included in the paste forming the coated sheet can be chosen based on one or more characteristics. Functionally, the aerosol former provides a mechanism that allows it to be volatilized and to deliver nicotine or flavorings or both in an aerosol when heated above the specific volatilization temperature of the aerosol former. Different aerosol formers typically vaporize at different temperatures. An aerosol former can be chosen based on its ability, for example, to remain stable at or near room temperature, but capable of volatilizing at a higher temperature, for example, between 40 °C and 450 °C. The aerosol former can also have humectant-like properties that help maintain a desirable level of moisture in an aerosol former substrate when the substrate is composed of a tobacco-based product, including tobacco particles. In particular, some aerosol formers are a hygroscopic material that functions as a humectant, that is, a material that helps to keep a substrate containing the humectant moist.
    [0016] One or more of an aerosol former can be combined to take advantage of one or more properties of combined aerosol formers. For example, triacetin can be combined with glycerin and water to take advantage of triacetin's ability to impart the active components and wetting properties of glycerin.
    [0017] Aerosol formers may be selected from polyols, glycol ethers, polyol ester, esters and fatty acids and may include one or more of the following compounds: glycerin, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethylene glycol , triethyl citrate, propylene carbonate, ethyl laurate, triacetin, meso-erythritol, a mixture of diacetin, a diethyl suberate, triethyl citrate, benzyl benzoate, phenyl benzyl acetate, ethyl vanylate, tributyrin, lauryl acetate , lauric acid, myristic acid and propylene glycol.
    [0018] A typical process for producing coated sheet includes the tobacco preparation step. For this, the tobacco is shredded. The shredded tobacco is then mixed with other types of tobacco and ground. Usually the other types of tobacco are other types of tobacco like Virginia and Burley or for example it can also be tobacco treated differently. Mixing and grinding steps can be alternated. The fibers are prepared separately and preferably as to be used for the pulp in the form of a solution. The solution and prepared tobacco are then mixed, preferably together with the susceptor particles. To form the coated sheet, the paste is transferred to a sheet forming apparatus. For example, this can be a surface, for example of a continuous belt where the paste can be spread continuously. The paste is distributed over the surface to form a sheet. The sheet is then dried, preferably by heat and cooled after drying. Susceptor particles can also be applied to the slurry after being brought in in the form of a sheet, but before the sheet is dried. Hence, the susceptor particles are not homogeneously distributed within the sheet material, but can still be homogeneously distributed in the formed tobacco product by crimping the tobacco sheet. Before the coated sheet is wound onto a bobbin for later use, the edges of the coated sheet are trimmed and the sheet can be cut. However, cutting can also be done after the sheet has been wound onto the bobbin. The coil can then be transferred to a sheet processing facility, such as a crimp and column forming a unit, or it can be placed in a coil storage for future use.
    [0019] Crimped tobacco sheet, for example a coated sheet, may have a thickness in a range between 0.5mm and about 2mm, preferably between about 0.8mm and about 1.5mm, for example 1mm. Thickness deviations of up to about 30 percent can occur due to manufacturing tolerances.
    [0020] A susceptor is a conductor that is capable of being inductively heated. A susceptor is able to absorb electromagnetic energy and convert it into heat. In the tobacco product according to the invention, changing electromagnetic fields generated by one or more induction coils of an inductive heating device heats the susceptor, which then transfers heat to the aerosol forming substrate of the tobacco product, mainly by heat conduction. Hence, the susceptor is in thermal proximity to the tobacco material and the aerosol former of the aerosol forming substrate. Due to the particulate nature of the susceptor, heat is produced in accordance with the distribution of particles in the tobacco sheet.
    [0021] In some preferred embodiments of the tobacco product according to the invention, the tobacco material is a homogenized tobacco material and the aerosol former is composed of glycerin. Preferably, the tobacco product is made from a coated sheet as described above.
    [0022] It has further been observed that only specific desusceptor particles with specific characteristics are suitable in combination with a tobacco product made from crimped tobacco sheet which contains an aerosol former, especially made from a crimp mold sheet and preferably containing glycerin as an aerosol former, in order to provide sufficient heat for optimal aerosol formation, but preferably without burning the tobacco or fibers.
    [0023] With an optimal selection and distribution of particles in the tobacco leaf, the energy required for heating can be reduced. However, enough energy is still provided to release volatile compounds from the substrate. Energy reduction can not only reduce the energy consumption of an inductive heating device for aerosol generation with which the tobacco product is used, but it can also reduce the risk of overheating of the aerosol generating substrate. Energy efficiency is also achieved by carrying out an aerosol former depletion in the tobacco product in a very homogeneous and complete manner. Especially, peripheral regions of a tobacco product can also contribute to aerosol formation. Therefore, a tobacco product such as a tobacco plug can be used more effectively. For example, a smoking experience can be improved or the size of the tobacco product can be reduced by evaporating the same amount of volatile compounds from the tobacco product as in a conventionally longer or larger aerosol-forming substrate. Thus, costs can be saved and waste can be reduced.
    [0024] According to one aspect of the tobacco product according to the invention, the susceptor particles have sizes in a range of about 5 micrometers to about 100 micrometers, preferably in a range of about 10 micrometers to about 80 micrometers, for example, have sizes between 20 micrometers and 50 micrometers. It was found that sizes in these ranges for particles used as a susceptor are the ideal range to allow for a homogeneous distribution in a tobacco leaf. Very small particles are not desired due to the film effect which does not allow the small particles to heat efficiently. In addition, smaller particles can pass through a conventional filter such as those used in smoking articles. Such filters can also be used in combination with the tobacco product in accordance with the invention. Larger particles make homogeneous distribution in a sheet material and especially in a tobacco product formed from a crimped tobacco sheet difficult or impossible. Larger particles may not be distributed on the tobacco leaf as gently as smaller particles. Also, larger particles tend to protrude out of the tobacco sheet so that they can come into contact with each other after crimping the tobacco sheet. This is unfavorable due to locally improved heat generation. Particle size is understood herein as the equivalent spherical diameter. Since particles can have an irregular shape, the equivalent spherical diameter defines the diameter of a sphere of equivalent volume as an irregularly shaped particle.
    [0025] According to another aspect of the tobacco product according to the invention, the plurality of amounts of particles is in a range between about 4 percent by weight and about 45 percent by weight, preferably at about 10 percent. percent by weight is about 40 percent by weight, for example, 30 percent by weight of the tobacco product. It will now be apparent to one of skill in the art that, although various susceptor weight percentages are provided above, changes in the composition of the elements comprising the tobacco product, including tobacco weight percentage, aerosol former, binders and water will require adjust the percentage weight of the susceptor needed to effectively heat the tobacco product.
    [0026] It has been found that amounts of susceptor particles in these weight ranges in relation to the weight of the tobacco product are in an ideal range to provide a homogeneous heat distribution over the entire tobacco product. In addition, these susceptor particle weight ranges are in an ideal range to provide enough heat to heat the tobacco product to a homogeneous and average temperature, for example, at temperatures between 200 °C and 240 °C.
    [0027] According to another aspect of the tobacco product according to the invention, the particles comprise or are made of a sintered material. Sintered material offers a wide range of electrical, magnetic and thermal properties. Sintered material can be ceramic, metallic or plastic in nature. Preferably, for susceptor particles, metal alloys are used. Depending on the manufacturing process, such sintered materials can be adapted for a particular application. Preferably, the sintered material for the particles used in the tobacco product according to the invention has a high thermal conductivity and a high magnetic permeability.
    [0028] According to another aspect of the tobacco product according to the invention, the particles comprise an external surface which is chemically inert. A chemically inert surface prevents particles from taking place in a chemical reaction or possibly serving as a catalyst to initiate an unwanted chemical reaction when the tobacco product is heated. An external chemical inert surface can be a chemically inert surface of the susceptor material itself. The chemically inert outer surface can also be a chemically inert cover layer that encapsulates the susceptor material within the chemically inert cover. A cover material can withstand such high temperatures as the particles are heated. An encapsulation step can be integrated into a sintering process when particles are fabricated. Chemically inert is understood herein in relation to chemical substances generated by heating the tobacco product and which are present in the tobacco product.
    [0029] In some preferred embodiments of the tobacco product according to the invention, the particles are made of ferrite. Ferrite is a magnet with a high magnetic permeability and is especially suitable as a susceptor material. The main component of ferrite is iron. Other metallic components, for example zinc, nickel, manganese or non-metallic components, such as silicone, may be present in varying amounts. Ferrite is a relatively inexpensive, commercially available material. Ferrite is available in particle form in particle size ranges used in the tobacco product according to the invention. Preferably, the particles are a fully sintered ferrite powder such as FP350 available from Powder Processing Technology LLC, USA.
    According to yet another aspect of the tobacco product according to the invention, the susceptor has a Curie temperature between about 200 °C and about 450 °C, preferably between about 240 °C and about 400 °C, for example, about 280 °C.
    [0031] Particles comprising susceptor material with Curie temperature in the indicated range allow to achieve a fairly homogeneous temperature distribution of the tobacco product and an average temperature of between about 200 °C and 240 °C. Additionally, local temperatures of the aerosol forming substrate generally do not or significantly exceed the Curie temperature of the susceptor. Thus, local temperatures can be below about 400°C, below which no significant burning of the aerosol-forming substrate occurs.
    [0032] When a susceptor material reaches its Curie temperature, the magnetic properties change. The Curie temperature of the susceptor material changes from a ferromagnetic phase to a paramagnetic phase. At this point, heating based on energy loss due to the orientation of the ferromagnetic domains to. Further heating is then mainly based on the formation of eddy current so that a heating process is automatically reduced upon reaching the Curie temperature of the susceptor material. Reducing the risk of overheating of the aerosol forming substrate can be supported by the use of susceptor materials with a Curie temperature, which allows a heating process due to loss of hysteresis only up to a certain maximum temperature. Preferably, a susceptor material and its Curie temperature are tailored in the composition of the aerosol forming substrate to achieve an optimal temperature and temperature distribution in the tobacco product for optimal aerosol generation.
    [0033] According to one aspect of the tobacco product according to the invention, the tobacco product is in the form of a column with a column diameter in the range of between about 3 millimeters to about 9 millimeters, preferably between about 4 millimeters. millimeters to about 8 millimeters, for example 7 millimeters. The column may have a column length in the range of between about 2 millimeters to about 20 millimeters, preferably between about 6 millimeters to about 12 millimeters, for example 10 millimeters. Preferably, the column has a circular or oval cross section. However, the column can also have the cross section of a rectangle or a polygon.
    [0034] To facilitate easy manipulation of the tobacco column by a consumer, the column can be provided in a tobacco rod that includes the column, a filter and a nozzle formed sequentially. The filter may be a material capable of cooling the aerosol formed from the column material and may also be capable of altering the constituents present in the formed aerosol. For example, if the filter consists of a polylactic acid or similar polymer, the filter can eliminate or reduce levels of phenol in the aerosol. The column, filter and mouthpiece can be circumscribed with a paper having sufficient stiffness to facilitate handling of the column. The length of the tobacco rod can be between 20 mm and 55 mm and preferably it can be approximately 45 mm in length.
    [0035] Likewise, in another aspect of the invention, there is provided a tobacco material containing a unit, for example a tobacco rod, the unit comprising a tobacco product as described in this application, and a filter. The tobacco product and filter are aligned in a longitudinal fashion and are wrapped with a sheet material, for example paper, to secure the filter and tobacco product to the tobacco material-containing unit.
    [0036] The invention will be further described with reference to the modalities, which are illustrated by means of the attached figures, in which:
    [0037] Figure 1 is a schematic drawing of a tobacco sheet with homogenized tobacco material and susceptor particles;
    [0038] Figure 2 shows a temperature simulation of a tobacco plug made from a crimped homogenized tobacco sheet heated by a heating blade;
    [0039] Figure 3 shows a temperature simulation of a tobacco plug made from a tobacco sheet, according to Figure 1 with uniform distribution of susceptor particles;
    [0040] Figure 4 shows a simulated glycerin depletion profile of the tobacco plug, according to Figure 2;
    [0041] Figure 5 shows a simulated glycerin depletion profile of the tobacco plug, according to Figure 3;
    [0042] Figure 6 shows the simulated mean temperature versus time curves of a tobacco plug heated with a heating blade and comprising uniform distribution of susceptor particle, for example according to Figures 2 and 3.
    [0043] Figure 1 schematically shows an aerosol forming substrate in the form of a tobacco sheet 1. The tobacco sheet is made of homogenized tobacco particles 11 and preferably is a coated sheet as defined above and contains susceptor particles 10.
    [0044] The thickness 12 of the tobacco sheet preferably lies between 0.8mm and 1.5mm, while the size of the susceptor particles preferably lies between 10 micrometers and 80 micrometers. To form the tobacco product according to the invention the tobacco sheet 1 is crimped and folded to form a tobacco column. Such a continuous column is then cut to the size necessary for a tobacco plug to be used in combination with an inductive heating device for aerosol generation.
    [0045] Figure 2 shows a view at a simulated temperature distribution of a cross section of a cylindrical tobacco plug 2, heated by a heating blade 20. The tobacco plug contains an aerosol forming substrate made from a sheet of foil. crimped tobacco containing homogenized tobacco material and glycerin as an aerosol former. The crimped tobacco sheet formed in column form is enveloped by a wrapper 23, for example, paper. In the center of the tobacco plug, the rectangular resistively heatable heating blade 20 is inserted for heating the aerosol forming substrate. In Figure 2 the temperature distribution has been simulated and is shown for plug heating so that the core temperature is about 370 degrees C at the center and as low as 80 degrees C at the perimeter. Temperatures in the proximal 220 region of blade 20 are as high as about 380 °C. Temperatures in the intermediate 221 and distal 222 peripheral regions are still as low as about 100-150 °C. Thus, according to the simulation measurement, peripheral and intermediate regions of the blade heated the tobacco plug to only a limited extent that occurs in aerosol formation - at least if blade heating is limited to not fully burning the tobacco in the region proximal 220.
    [0046] This is also illustrated in Figure 4. In it, the glycerin depletion of the tobacco plug according to Figure 2 is shown. It can be seen that glycerin is completely depleted in the proximal region 220 after five minutes of heating. No depletion occurred in the peripheral regions, 222, while the intermediate region 221 is partially depleted. Due to the rectangular cross-sectional shape of the heating blade, the peripheral regions 222 without depletion are limited to the plug portions, which are disposed alongside the longer sides of the blade 20. The proximal region 220 is arranged directly adjacent to the blade. heating 20 and extends to the maximum for about 1/3 of the radius to each long side of the blade 20.
    [0047] Figure 3 shows a view in a simulated temperature distribution of a cross section of an inductively heated cylindrical tobacco plug 3. The tobacco plug is made of a crimped tobacco sheet containing susceptor particles, as described in Figure 1. In the tobacco plug used for temperature simulation, 90 milligrams FP 350 of ferrite particles having an average size of 50 micrometers are evenly distributed on the coated sheet made of a slurry of tobacco particles, fibers, binder and glycerin as a builder. aerosol.
    [0048] The crimped tobacco sheet formed in column form is surrounded by a wrapping 13, for example, paper. Susceptor particles are evenly distributed over the tobacco plug (not shown). The plug is heated by means of inductively heated susceptor particles. In Figure 3 the temperature distribution has been simulated and is shown for plug heating with a more uniform temperature expected based on the evenly distributed susceptor particles within the plug. A temperature in a central 110 region is about 300 °C. This circular central region 110 is quite large and extends to about half the radius of the tobacco plug. Temperatures in a narrow annular intermediate region 111 are about 250 °C and temperatures in the circumferentially disposed peripheral region 112 are about 200 °C. Thus, according to the simulation measurement, the glycerin evaporates quite homogeneously and over substantially the entire area of the tobacco plug. Glycerin is also evaporated from the intermediate 111 and peripheral 112 regions of the tobacco plug. Thus, all areas of the tobacco plug are utilized for aerosol formation, even at maximum heating temperatures well below those known for centrally and resistively heated tobacco plugs.
    [0049] The glycerin depletion of the tobacco plug of Figure 3 is illustrated in Figure 5. It can be seen that the glycerin is not fully depleted yet, not even after five minutes of heating in the central region 110. However, some depletion it occurred in the intermediate region 111 and, to a lesser extent, in the peripheral region 112.
    [0050] The simulation of temperature and glycerin depletion of the plugs according to Figures 2 and 3, but heated for only about one minute and 1.5 minutes shows the same relative temperature behavior. After 1 minute, the tobacco plug according to the invention has already reached a temperature of between about 150 to 200 °C along the central and intermediate region. Glycerin depletion has not started yet. After 1.5 minutes temperatures increased in the inner peripheral region to about 200 °C to up to about 280 °C in the central region. Temperatures as low as 150 °C are only present in the outer peripheral region 112. Thus, a depletion of glycerin occurs over a large area of the tobacco plug just after one or two minutes after the start of heating the tobacco plug.
    [0051] In contrast to the tobacco plug with desusceptor particles according to the invention, a temperature distribution of the tobacco plug according to Figure 2 with the heating blade is almost identical to that shown in Figure 2 just after 1, 5 minutes of heating. After 1.5 minutes of heating, the proximal region 220 has temperatures as high as 380 °C and temperatures as low as about 100 °C in the peripheral and intermediate regions. After 1 minute of heating only a small proximal region around the heating blade 20 is heated to approximately 200 °C. The remaining regions have slightly elevated temperatures or are still at room temperature.
    [0052] In Figure 6, the mean temperature T in the tobacco plug volume of the plug according to Figure 1 and Figure 3 versus time t is depicted. Line 35 indicates the temperature curve of the tobacco plug with susceptor particles according to the invention and line 25 indicates the temperature curve of the tobacco plug heated with the heating blade. The maximum heating temperature of the heating blade was limited to 360 °C, while a Curie temperature of the susceptor in the tobacco plug according to the invention was between 350 and 400 °C. It can be seen that in the plug with the homogeneously distributed particles the average temperature rises much faster and slowly approaches a maximum average temperature of about 250 °C. The average temperature of the tobacco plug heated by the blade takes a little longer to rise. The maximum average temperature in the blade-heated tobacco plug is about 220°C. No other average temperature can be reached due to peripheral regions that are not heated by the heating blade.
    权利要求:
    Claims (14)
    [0001]
    1. Inductively heatable tobacco product for aerosol generation, characterized in that it comprises an aerosol forming substrate containing a susceptor in the form of a plurality of particles (10), the aerosol forming substrate being a tobacco sheet crimp (1) comprising tobacco material, fibers, binder, aerosol former and the susceptor in the form of the plurality of particles (10).
    [0002]
    2. Tobacco product, according to claim 1, characterized by the fact that the tobacco product has a heat loss of at least 0.008 Joule per kilogram.
    [0003]
    3. Tobacco product according to claim 2, characterized in that the heat loss is greater than 0.05 Joule per kilogram, preferably greater than 0.1 Joule per kilogram.
    [0004]
    4. Tobacco product according to any one of claims 1 to 3, characterized in that the particle sizes (10) of the plurality of particles (10) are in a range of from 5 micrometers to 100 micrometers, preferably, in a range of 10 micrometers to 80 micrometers, for example, between 20 micrometers and 50 micrometers.
    [0005]
    5. Tobacco product according to any one of claims 1 to 4, characterized in that the plurality of particles (10) corresponding to a range between 4 percent by weight and 45 percent by weight, preferably, from 10 percent by weight to 40 percent by weight, for example, 30 percent by weight of the tobacco product.
    [0006]
    6. Tobacco product according to any one of claims 1 to 5, characterized in that the particles (10) are homogeneously distributed in the aerosol forming substrate.
    [0007]
    7. Tobacco product according to any one of claims 1 to 6, characterized in that the particles (10) comprise a sintered material.
    [0008]
    8. Tobacco product according to any one of claims 1 to 7, characterized in that the particles (10) comprise an external surface, which is chemically inert.
    [0009]
    9. Tobacco product according to any one of claims 1 to 6, characterized in that the particles (10) are made of ferrite.
    [0010]
    10. Tobacco product according to any one of claims 1 to 9, characterized in that the tobacco material is homogenized tobacco material, and the aerosol former comprises glycerin.
    [0011]
    11. Tobacco product according to any one of claims 1 to 10, characterized in that the crimped tobacco sheet (1) has a thickness in a range between 0.5 millimeters and 2 millimeters, preferably between 0. 8mm and 1.5mm.
    [0012]
    12. Tobacco product according to any one of claims 1 to 11, characterized in that the susceptor has a Curie temperature between 200 °C and 400 °C, preferably between 240 °C and 350 °C, for example, 280 °C.
    [0013]
    13. Tobacco product according to any one of claims 1 to 12, characterized in that it has the shape of a column with a column diameter in the range between 3 millimeters to 9 millimeters, preferably between 4 millimeters to 8 millimeters 7 millimeters, for example, and with a column length in the range between 2 millimeters to 20 millimeters, preferably between 6 millimeters to 12 millimeters, for example 10 millimeters.
    [0014]
    14. Tobacco material, characterized in that it contains a unit comprising: a tobacco product as defined in any one of claims 1 to 13, and a filter, the tobacco product and the filter being aligned in a manner longitudinally and are wrapped with a sheet material for attaching the filter and the tobacco product to the unit, which comprises a tobacco material.
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    引用文献:
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    法律状态:
    2020-02-18| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/05/2015, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP14169187.3|2014-05-21|
    EP14169187|2014-05-21|
    PCT/EP2015/061197|WO2015177252A1|2014-05-21|2015-05-21|Inductively heatable tobacco product|
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