Aerosol-generating article having tobacco particulates and a cooling element, and method of making the aerosol-generating article

Abstract

The present invention relates to an aerosol-generating article (1) for a non-combustion heated aerosol generating device. The aerosol-generating article (1) extends in a longitudinal direction and includes an aerosol-generating substrate (2), a mouth-end segment (4) downstream of the aerosol-generating substrate (2) with respect to the aerosol flow path, and a cooling element (3) disposed between the aerosol-generating substrate (2) and the mouth-end segment (4). The aerosol-generating substrate (2) contains tobacco particulates. The cooling element (3) includes a plurality of channels (5) extending at least partially essentially parallel to the longitudinal direction of the aerosol-generating article (1).

Description

[Technical Field]

[0001] The present invention relates to an aerosol-generating article for a non-combustion heated aerosol-generating device (heated device). The aerosol-generating article extends longitudinally and includes an aerosol-generating substrate, a mouth-end segment downstream of the aerosol-generating substrate with respect to the aerosol flow path, and a cooling element disposed between the aerosol-generating substrate and the mouth-end segment. The aerosol-generating substrate contains tobacco particulates. The cooling element includes a plurality of channels extending at least partially essentially parallel to the longitudinal direction of the aerosol-generating article.

[0002] Non-combustion heated aerosol generators are items that reduce harmful substances produced by combustion because flavors are heated rather than burned. Consumers simply inhale the aerosol generated under controlled conditions. To provide consumers with high enjoyment right from the start without falling off during inhalation, it is important to provide a consistent aerosol vapor with the desired composition right from the start. This can be influenced by both the design of the aerosol-generating article and the composition of the aerosol-generating substrate. In addition, the nicotine content in the aerosol plays a major role in achieving the desired effect compared to the flavor. [Background technology]

[0003] U.S. Patent Application Publication No. 20220175034A1 discloses an aerosol-generating article including an aerosol-forming substrate, a hollow tubular support element, and a filter. The aerosol-forming substrate is located at the upstream end of the article. A hollow tubular support element extending along the longitudinal direction is disposed downstream of the aerosol-forming substrate. A filter element is disposed downstream of the hollow tubular support element. The hollow tubular support element has a hardness of at least about 80% as determined by the DD60A test, and is promoted with optimized heat capacity and structural properties. The hollow tubular support element also defines a longitudinally extending opening configured to allow aerosol to flow toward the downstream end. The aerosol-forming substrate may be a tobacco-containing substrate and may have a hollow tubular shape to accommodate a heating element without perforating the tobacco-containing substrate.

[0004] Korean Patent No. 2268663B1 discloses an aerosol-generating article combined with an aerosol generating device to generate an aerosol. The aerosol-generating article includes a tobacco rod and a cooling structure manufactured by weaving at least one fiber bundle. The tobacco rod includes an aerosol-generating material, such as glycerin, propylene glycol, or ethylene glycol. In addition, the tobacco rod may include other additive substances, such as flavoring agents, humectants, and / or organic acids.

[0005] U.S. Patent Application Publication No. 20210015170A1 relates to an aerosol-generating article including an aerosol-forming substrate, a support element immediately downstream of the aerosol-forming substrate, and an aerosol-cooling element downstream of the support element. Furthermore, a mouthpiece filter can be disposed at the most downstream end of the aerosol-generating article. The aerosol-forming substrate includes a collected sheet of compressed and homogenized tobacco material surrounded by a wrapper.

[0006] From WO 2017041920 A1, an aerosol-generating article is known that includes homogenized tobacco. The homogenized tobacco may be a blend of different tobacco types and a specific particle size. The blend may include several flavoring agents. A method for forming the homogenized tobacco includes heating and forming a homogenized slurry that includes tobacco powder with a specific particle size.

[0007] WO 2021 / 170650 A1 discloses an aerosol-generating article for producing an inhalable aerosol. The aerosol-generating article includes a rod of aerosol-generating substrate, which includes a homogenized plant material containing tobacco particles and non-tobacco plant flavor particles. The non-tobacco plant flavor particles include particles of eucalyptus, anise, clove, ginger, rosemary, or a combination thereof. Therefore, the present invention does not have multiple channels. As a result, there is no optimization of flavor and temperature delivery to the customer. In an article with this configuration, the flavor changes over the use of the aerosol-generating article, as does the temperature of the aerosol.

[0008] EP 2625975 A1 relates to an aerosol-generating article comprising an aerosol-forming substrate and an aerosol-cooling element for cooling the aerosol formed from the substrate. It does not disclose the composition of the aerosol consisting of particles of tobacco and a nicotine source.

[0009] Known aerosol-generating articles are based on different designs to optimize flavor delivery to the user. Therefore, it is important that the flavor is present from the beginning and remains essentially constant until the end of inhalation. In addition to flavor, the nicotine content in the aerosol is an important criterion for consumers. Also, the nicotine content needs to be essentially constant during inhalation. However, known aerosol-generating articles of current design are unable to provide an essentially constant flavor and / or nicotine content during inhalation. Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, an object of the present invention is to improve flavor delivery to the user, i.e., by optimizing the nicotine content in the aerosol quickly at the beginning of inhalation and keeping it essentially constant throughout inhalation. This must also be done while the flavor remains constant during inhalation. While maintaining a high nicotine level in the generated aerosol throughout the inhalation period is important, it is also an object of the present invention to provide an aerosol with appropriate inhalation parameters for sensory purposes. Aerosol-generating articles with enhanced tobacco flavor content and enhanced nicotine content in the aerosol require sufficient control of the inhalation temperature to avoid irritation of the throat lining and the airways to the lungs, which could potentially cause discomfort during inhalation. [Means for solving the problem]

[0011] It has been found that these problems can be overcome by an aerosol-generating article according to claim 1 and a method according to claim 14.

[0012] The aerosol-generating article for a non-combustion heated aerosol generating device preferably has a longitudinally extending, generally cylindrical shape and includes an aerosol-generating substrate, an oral end segment disposed downstream of the aerosol-generating substrate with respect to the aerosol flow path, and a cooling element disposed between the aerosol-generating substrate and the oral end segment.

[0013] The oral end segment according to the present invention is the end from which the user preferably inhales the aerosol, and is usually wrapped in paper or has another comfortable surface structure for a comfortable feel on the lips during inhalation.

[0014] The cooling element according to the present invention comprises a plurality of channels essentially parallel to the longitudinal direction of the aerosol-generating article, at least in part. The cooling element is an important feature for delivering the desired flavored aerosol to the user at an appropriate inhalation temperature. During the inhalation period, the aerosol-generating substrate can be heated to a high temperature, i.e., vaporization temperature, in the vaporization chamber of the heated device, preferably from above 150°C to 380°C, and most preferably from 200°C to 350°C. This aerosol will be too hot for the user to inhale, and the desired temperature range for inhaling the aerosol must be lower than the optimal temperature for producing an aerosol with the desired flavor. Therefore, at such a vaporization temperature, vaporization of the aerosol-generating substrate can occur quickly in the vaporization chamber, and then, thanks to the cooling element that cools the formed aerosol, the aerosol droplets are provided to the user at an appropriate inhalation temperature. The appropriate inhalation temperature is below 50°C, preferably between 25°C and 45°C, and most preferably between 30°C and 42°C. To achieve the best possible cooling, both geometric and material dimensions must be taken into account. In addition, the cooling preferably does not adversely affect the composition of the aerosol and / or the inhalation process of the aerosol.

[0015] The cooling effect is generally caused by heat transfer from a hotter medium, in this case the aerosol, to a cooler medium, in this case the cooling element. The surface area between the two media, the temperature difference between the media, and the heat transfer coefficient are important variables. Therefore, they must be utilized in a clever way to provide the customer with the aerosol at the desired temperature.

[0016] As noted above, surface area is one variable that affects heat transfer and therefore aerosol cooling. Generally, the greater the surface area between the aerosol and the cooling element, the more cooled the aerosol will be when it reaches the downstream mouth end segment of the cooling element.

[0017] Due to the elongated design of the cooling element, the cylindrical shape of the channels is easy to manufacture and an effective way to cool the aerosol. Branching structures increase the surface area, but also cause aerosol deposition. This leads to increased condensation within the cooling element, which is undesirable. Another consideration is the flow resistance. This also needs to be set so that the customer does not have to inhale too hard to inhale the aerosol. Therefore, a compromise between the cooling area and the flow resistance needs to be maintained. Also, the length of the cooling element can be adapted.

[0018] As the aerosol flows through the multiple channels, the temperature of the aerosol decreases and the temperature of the channel walls increases. Here, the heat capacity of the cooling element is also important, as it determines how much energy can be handled from the aerosol to the cooling element. In the final stage, the temperature of the element becomes equal to the temperature of the aerosol. Therefore, in a preferred embodiment, the cooling element has a conductive connection to the aerosol generation device, so that heat can also continue to dissipate from the cooling element to the aerosol generation device, thereby maintaining the aerosol cooling at all times. In another preferred embodiment, the cooling element or an external cooled surface of the aerosol generation device is attached to further dissipate heat.

[0019] The heat transfer coefficient can be affected by the aerosol velocity and flow type, i.e., laminar or turbulent, and the texture of the channel walls. Nevertheless, this variable sets itself as the aerosol quality is optimized for the best flavor and experience for the customer. DETAILED DESCRIPTION OF THE INVENTION

[0020] In a preferred embodiment, the channels are straight, parallel to one another, and have the same diameter. In another preferred embodiment, the channels may be straight, parallel to one another, and have different diameters. In another preferred embodiment, the channels are conical or tapered, either the same or different from one another. In such cases, each channel has a diameter that varies along the entire length of said channel. In certain embodiments where tapered channels are contemplated, the diameter of the channel at the upstream end of the cooling element is larger than the diameter of the channel at the downstream end of the cooling element. In certain other embodiments where tapered channels are contemplated, the diameter of the channel at the downstream end of the cooling element is larger than the diameter of the channel at the upstream end of the cooling element. In a preferred embodiment, the channels are formed by extrusion techniques.

[0021] The aerosol-generating substrate of the present invention comprises fine tobacco particles. The particle size is one of several variables that can determine how quickly the flavor is established when the aerosol-generating device is turned on. The particle size can also determine how strong the tobacco taste is. To achieve a desired flavor, tobacco particles from different tobacco types can be blended. It can also be useful to use different sizes of tobacco particles of one type and / or different particle sizes for different tobacco types to achieve the flavor most beneficial to the customer. This is another important step beyond the cooling segment to achieve the goal of providing the customer with the best experience from the start. As mentioned above, not only flavor but also nicotine content is important to provide the customer with the best possible experience immediately after turning on the aerosol-generating device. Fine tobacco particles facilitate the delivery of an aerosol with sufficient nicotine levels. Fine particles heat faster and have a larger surface area for the same mass. Therefore, the amount of nicotine released immediately after turning on the device is greater than that of aerosol-generating articles of the conventional technology. Therefore, in a preferred embodiment, fine tobacco particles (SD) are used. 50The size of the tobacco particles ranges from 10 to 200 μm, preferably from 15 to 100 μm. More preferably, the size of the tobacco particles is from 20 to 50 μm. Even more preferably, the size of the tobacco particles is 30 μm in size, optionally with a deviation of ±≦5 μm, preferably with an even smaller deviation of ±≦2 μm.

[0022] In another preferred embodiment, nicotine source particles can be added to the aerosol-generating substrate. As used herein, "nicotine source particles" refers to nicotine powder, which is distinct from "tobacco particles" and has a defined and optimal particle size. Powdered nicotine or "nicotine source particles" are more stable than liquid nicotine bases and offer the same advantages as liquid nicotine salt bases dissolved in propylene glycol or glycerin. Powdered nicotine or "nicotine source particles" vaporize at a low temperature and have a low pH, providing a smoother vaping experience and better nicotine absorption. For example, "nicotine source particles" can be nicotine salt, microcrystalline cellulose-loaded nicotine, or nicotine powder bound to an ion-exchange resin to facilitate controlled release. Depending on the desired nicotine level in the aerosol, the particle size (SD) of the nicotine source can be adjusted. 50 Sedigraph) is in the range of 10-300 μm, preferably 20-200 μm, more preferably 30-100 μm. Most preferably, the particle size of the nicotine source is about 50 μm, preferably in the range of ±≦5 μm. A range of ±≦2 μm is preferred to allow even more precise adjustment of the nicotine content in the aerosol.

[0023] In another preferred embodiment, the average size (SD) of the particulates of the nicotine source 50Sedigraph) exceeds the average size of tobacco particles. This can be done to affect the flavor and nicotine content in the aerosol. Preferably, the nicotine source particles are at least a factor of 1.2 to 4.0 greater than the size of tobacco particles, more preferably at least a factor of 1.4 to 2 greater than the size of tobacco particles, and even more preferably at least a factor of 1.6 to 1.8 greater than the size of tobacco particles. Preferably, the nicotine source particles are at least a factor of 1.2 to 4.0 greater than the size of tobacco particles, more preferably at least a factor of 1.4 to 2 greater than the size of tobacco particles. Most preferred is a factor of 1.6 to 1.8 greater than the size of tobacco particles.

[0024] As mentioned above, the fine particles of tobacco and nicotine source are important for controlling the flavor and nicotine content of the aerosol. Therefore, in a preferred embodiment, both particle types are mixed together and preferably uniformly distributed in the aerosol-generating substrate. It may also be preferable to arrange more uniform stacks of aerosol-generating substrates together to obtain a stacked aerosol-generating substrate. In a preferred embodiment, this stack is used to initially provide some nicotine content very quickly, even if the heater of the aerosol generating device has not yet reached its optimal temperature. Once the heater reaches its optimal operating temperature, the first stack is exhausted, and the stack that produces the best flavor and nicotine content under steady-temperature conditions is used.

[0025] In a preferred embodiment, the tobacco particles are in a liquid suspension. This liquid suspension comprises glycerol (vegetable glycerin (VG)), propylene glycol (PG), water or a mixture thereof. The liquid suspension provides particularly good conditions for producing an aerosol with the best possible taste and consistent nicotine content. The suspension may also contain other flavorings in solid or liquid form. In a preferred embodiment, fine nicotine particles may also be included. Preferably, all components of the liquid suspension are uniformly distributed.

[0026] In another preferred embodiment, the weight fraction of tobacco particulates to the weight fraction of nicotine source particles in the aerosol-generating substrate is in the range of 95:5 to 40:60, preferably in the range of 90:10 to 50:50, and more preferably in the range of 80:20 to 60:40. In the most preferred embodiment, the relationship between the weight fraction of tobacco particulates and the weight fraction of nicotine source particulates is preferably in the range of 70:30, optionally with a deviation of no more than ±≦5%, preferably no more than ±≦2%.

[0027] Preferably, the amount of tobacco particles and / or nicotine source particles in the aerosol-generating substrate is in a range that provides the consumer with the best flavor and nicotine content during inhalation of the aerosol. This range is 0.5 to 30% by weight of tobacco particles and / or nicotine source particles, based on the total weight of the aerosol-generating substrate. Preferably, this range is 1 to 15% by weight, more preferably 1 to 10% by weight, and most preferably 1 to 8% by weight of tobacco particles and / or nicotine source particles, based on the total weight of the aerosol-generating substrate.

[0028] In another preferred embodiment, the aerosol-generating substrate according to the present invention further comprises a tobacco sheet material and / or a binder. The tobacco sheet material, also known as reconstituted tobacco sheet, can be obtained by a papermaking process or a casting process. The binder can be one or more compounds selected from the group including alginic acid, pectin, sucrose, starch (and derivatives), cellulose (and derivatives), gum, silica or silicone compounds, clay, polyvinyl alcohol, and combinations thereof. For example, in some embodiments, the binder comprises one or more of alginic acid, pectin, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, pullulan, xanthan gum, guar gum, carrageenan, agarose, acacia gum, fumed silica, sodium silicate, kaolin, and polyvinyl alcohol. The binder is preferably selected from the group including sucrose, starch, and combinations thereof. The binder can enable the tobacco sheet material to bind with tobacco particles and / or nicotine source particles in the aerosol-generating substrate.

[0029] As mentioned above, the channels of the cooling element affect the cooling of the aerosol during inhalation and its flow resistance. To optimize both parameters, the diameter of the channels ranges from 50 to 1000 μm, preferably from 75 to 750 μm, and more preferably from 100 to 500 μm. In the most preferred embodiment, the average diameter is from 150 to 400 μm.

[0030] The number of channels also affects the cooling and flow resistance of the aerosol. Therefore, in a preferred embodiment, the number of channels is optimized. The number of channels is about 50, preferably about 20, and more preferably 10 or less channels. In a most preferred embodiment, the number of channels in the cooling section is 6 or less.

[0031] In addition to the cooling element, the filter element in the mouth end segment is another part of the aerosol-generating article that contributes significantly to the flow resistance. Therefore, this embodiment is also optimized to provide the best customer experience. Flow resistance can be characterized by pressure drop. Pressure drop is defined as the pressure difference before and after an object flows through. In this case, it is the pressure drop across the filter element in the mouth end segment. Thus, a pressure difference between the flow before and after the filter is observed. Pressure drop can be optimized by the material density and composition of the filter. In a preferred embodiment, the pressure drop is 200 mmWG or less, preferably 150 mmWG or less, and more preferably 100 mmWG or less.

[0032] In a preferred embodiment, the filter element is selected from the group of components including hollow filters, cavity filters having cavities embedded in the filter material, filter plugs, and combinations thereof.

[0033] To further optimize the aerosol generating device, the oral end segment and / or the cooling element contain an adsorbent to positively influence the aerosol during inhalation, preferably selected from the group including activated carbon, charcoal, silica gel, zeolites, and combinations thereof.

[0034] In another preferred embodiment, the mouth end segment, such as a hollow filter, a cavity filter having cavities embedded in the filter material, a filter plug, and combinations thereof, and / or the cooling element are made from a material composition including a cellulose derivative, such as cellulose acetate, and / or a polymer, a polysaccharide, and a polylactide, and combinations thereof. Preferably, the polymer is selected from the group including polyesters, preferably polyhydroxyalkanoates (PHAs), more preferably polyhydroxybutyrates (PHBs), poly-4-hydroxybutyrates (P4HBs), polyhydroxyvalerates (PHVs), polyhydroxyhexanoates (PHHs), polyhydroxyoctanoates (PHOs), and copolymers thereof. The polysaccharide is preferably starch, more preferably thermoplastic starch (TPS).

[0035] Aerosol-generating articles are mass-produced consumer goods. Therefore, production methods must be simple and process safe to keep raw material consumption and costs low. Furthermore, it is desirable to keep the process reliability in production high. Therefore, the method for manufacturing aerosol-generating articles according to the described embodiments includes different structured steps.

[0036] The method of manufacturing an aerosol-generating article according to the preceding embodiment comprises at least four steps.

[0037] First, tobacco must be provided and ground to obtain tobacco particulates.

[0038] Second, an aerosol-forming substrate must be formed, which contains the tobacco particulates produced in step 1.

[0039] Third, providing a mouth end segment and a cooling element. The cooling element includes a plurality of channels that extend at least partially essentially parallel to one another. The preceding process steps for producing the mouth end segment and the cooling element will not be further described here.

[0040] Fourth, the aerosol-generating article is formed by positioning the mouth end segment and / or cooling element downstream of the aerosol-generating substrate relative to the aerosol flow path, such that the plurality of channels extend at least partially essentially parallel to the longitudinal direction of the aerosol-generating article.

[0041] As noted above, not only tobacco particles can be processed during production. Also, particles of a nicotine source can be introduced in a first process step and further processed in a second step. The same applies to other natural and artificial flavors.

[0042] In another embodiment, a method of making an aerosol-generating article according to the preceding embodiment comprises the steps of: i) providing a tobacco sheet material; ii) providing tobacco fine particles; iii) providing microparticles of a nicotine source; iv) adding tobacco fine particles, fine particles of a nicotine source, and a binder to the tobacco sheet material provided in step i) to form an aerosol-generating substrate; iii) wrapping the aerosol-generating substrate around a paper wrapper to form an aerosol-generating substrate rod; iv) providing an oral end segment and a cooling element, the cooling element including a plurality of channels extending at least partially essentially parallel to one another; and v) wrapping the aerosol-generating substrate rod, the mouth end segment, and the cooling element in tipping paper to form an aerosol-generating article according to the present invention.

[0043] In another preferred embodiment of the method, tobacco particulates and / or nicotine source particulates and / or natural and artificial flavors are mixed with a liquid to provide a suspension.

[0044] Further advantages, objects and features of the present invention will be explained, by way of example only, in the following description with reference to the accompanying drawings, in which similar components in different embodiments may be provided with the same reference signs, and in which:

[0045] The drawings are as follows: [Brief explanation of the drawings]

[0046] [Figure 1] 1 is a schematic side view of one embodiment of an aerosol-generating article. [Figure 2] 1 shows a schematic lateral intersection of one embodiment of an aerosol-generating article. [Figure 3] 1 shows a schematic lateral intersection of one embodiment of an aerosol-generating article. [Figure 4] 1 shows a schematic lateral intersection of one embodiment of an aerosol-generating article. [Figure 5] 1 shows a schematic lateral intersection of one embodiment of an aerosol-generating article. [Figure 6] 1 shows a schematic lateral intersection of one embodiment of an aerosol-generating article. [Figure 7] 1 shows a schematic longitudinal intersection of one embodiment of an aerosol-generating article. [Figure 8] 1 shows a schematic longitudinal intersection of one embodiment of an aerosol-generating article. [Figure 9] 1 shows a schematic longitudinal intersection of one embodiment of an aerosol-generating article.

[0047] 1 shows a side view of one embodiment of an aerosol-generating article 1. It includes an aerosol-generating substrate 2 and a cooling element 3 located downstream of the aerosol-generating substrate 2 and further downstream of a mouth-end segment 4 relative to the aerosol flow path. As previously mentioned, the mouth-end segment 4 may include a filter for filtering the aerosol before it is inhaled by a customer. Preferably, the aerosol-generating article 1 has a longitudinally extending cylindrical shape. The lengths of the above components may vary depending on the design.

[0048] FIG. 2 shows a cross-sectional view at cross-section level AA of the cooling element 3, an element of the aerosol-generating article 1. This section shows the channels 5 for cooling the aerosol. When a customer inhales the aerosol, the aerosol flows through the channels 5 and transfers heat to the cooling element 3. The cooling element 3 therefore functions as a heat sink. The cooling channels 5 can be arranged in different ways. The following figures show further preferred embodiments. It is important that the channels 5 extend substantially along the length of the cooling element 3, thus forming a passage between the aerosol-generating substrate 2 and the mouth-end segment 4. The arrangement of the channels 5 relative to one another can vary, as can the number of channels. In the embodiment shown in FIG. 2, 14 channels 5 are randomly arranged within the cooling element 3.

[0049] Figure 3 shows another cross-sectional view at cross-section level AA of an embodiment of the cooling element 3. Here, the channels 5 are arranged symmetrically: four channels 5 are located on the radii and one channel is located in the center of the cylindrical cooling element 3. The channels 5 may be of the same size, as shown in Figure 3. However, it is also possible for the diameter of the channels to vary, as can be seen in Figure 4.

[0050] 4 shows another cross-sectional view at cross-section level AA of an embodiment of the cooling element 3. Here again, the channels 5 are arranged radially symmetrically. In this embodiment, the diameters of the channels 5 vary. In this example, it is the centrally arranged channel, which exhibits the larger diameter. However, it is also possible that the other channels differ in size. This is a possible measure to optimize the cooling and flow resistance of the aerosol.

[0051] 5 shows another cross-sectional view at cross-section level AA of an embodiment of the cooling element 3. Here, the channels are arranged at horizontal levels and may vary in size. This arrangement of the channels 5 may be advantageous in manufacturing, since the needles for creating the holes can be arranged in levels.

[0052] 6 shows another cross-sectional view at cross-section level AA of an embodiment of the cooling element 3. In this example, the channels for cooling the aerosol are elliptical. This may be the intended shape, but it may also be a result of manufacturing, as the material of the cooling element is compressed during machining. Other, non-ideally circular shapes of the channels are also possible. These shapes do not pose any significant disadvantages in terms of cooling effectiveness or flow resistance compared to a precisely circular shape of the channels.

[0053] 7 shows a schematic longitudinal view of cross-section level BB of one embodiment of an aerosol-generating article (cross section). It includes an aerosol-generating substrate 2 and a cooling element 3 located downstream of the aerosol-generating substrate 2 and further downstream of the mouth-end segment 4 relative to the aerosol flow path. This cross-sectional view shows the channels 5 for cooling the aerosol. In this embodiment, they are aligned along the length of the cooling element. All channels 5 have the same diameter D1. There is no variation over the length of the cooling channels 5, nor is there any variation in the angle of the channels 5 relative to the centerline. All channels 5 preferably extend in straight lines.

[0054] FIG. 8 shows a schematic longitudinal view of cross-section level BB of another embodiment of an aerosol-generating article (intersection). It includes an aerosol-generating substrate 2 and a cooling element 3 located downstream of the aerosol-generating substrate 2 and further downstream of the mouth-end segment 4 relative to the aerosol flow path. The aerosol-generating substrate 2 exhibits a recess in a heat plate 6. When the aerosol-generating article 1 is inserted into an aerosol generating device, the heat plate is inserted into this recess 6. This recess 6 may be cylindrical, but may also have other shapes, such as rectangular. In this embodiment, the channels 5 are approximately linear relative to the centerline of the aerosol-generating article. However, they have different diameters D1 and D2, with diameter D1 being smaller than diameter D2. As previously explained, the cooling channels 5 can have different diameters D1 and D2 to optimize flow resistance and cooling effect. The number of channels 5 and also the number of different diameters D can vary.

[0055] FIG. 9 shows a schematic longitudinal view of cross-section level BB of another embodiment of an aerosol-generating article (intersection). Similar to the embodiments of FIGS. 7 and 8, it includes an aerosol-generating substrate 2 and a cooling element 3 located downstream of the aerosol-generating substrate 2 and further downstream of the mouth-end segment 4 relative to the aerosol flow path. In this embodiment, the channels (5) are not arranged exactly along the length of the cooling element. The channel shapes are also irregular and frayed. The diameters of the channels 5 vary. In the direction of the aerosol flow path, there may initially be a larger diameter D5 that narrows to diameter D6. The reverse may also occur. Diameter D3 increases in the direction of aerosol flow to diameter D4 at the end of the channel 5. The centerlines II of the channels 5 may have different angles relative to the centerline of the aerosol-generating article I. This may be due to the materials and / or manufacturing methods used. However, it is important that the flow resistance remains within the required range. As mentioned above, the mouth-end segment 4 may include a filter segment, the materials of which may also vary. The shape of the filter may be cylindrical and closed, or may have a recess. As shown in this figure, the cylindrical filter may have a cylindrical recess extending longitudinally. [Explanation of symbols]

[0056] 1. Aerosol-generating items 2. Aerosol-generating substrate 3. Cooling element 4. Oral end segment 5. Channels 6. Recesses in the heat blade I. Centerline of the aerosol-generating item II. Channel centerline D1 diameter 1 D2 diameter 2 D3 diameter 3 D4 diameter 4 D5 diameter 5 D6 diameter 6

Claims

1. An aerosol generating article (1) for a non-combustion heated aerosol generating device, comprising: The aerosol-generating article (1) extends along a longitudinal direction and includes an aerosol-generating substrate (2), The aerosol-generating substrate (2) is Tobacco particles and a mouth-end segment (4) located downstream of the aerosol-generating substrate (2) with respect to the flow path of the aerosol; a cooling element (3) disposed between the aerosol-generating substrate (2) and the mouth-end segment (4); Including, the cooling element (4) comprises a plurality of channels (5) extending at least partially essentially parallel to the longitudinal direction of the aerosol-generating article (1); the aerosol-generating substrate (2) further comprises fine particles of a nicotine source; The particle size (SD ５０ Sedigraph) is in the range of 10 to 300 μm, preferably 20 to 200 μm, more preferably 30 to 100 μm, most preferably 50 μm, optionally ±≦10 μm, preferably ±≦5 μm, more preferably ±≦2 μm; The mean size (SD ５０ Sedigraph shows the average size (SD) of the tobacco particles. ５０ Sedigraph), preferably by a factor in the range of 1.2 to 4, more preferably by a factor in the range of 1.4 to 2, and most preferably by a factor in the range of 1.6 to 1.8; An aerosol-generating article (1).

2. The size of the tobacco particles (SD ５０ Sedigraph) is in the range of 10 to 200 μm, preferably 15 to 100 μm, more preferably 20 to 50 μm, most preferably 30 μm, optionally ±≦5 μm, preferably ±≦2 μm; 2. An aerosol-generating article (1) according to claim 1.

3. the microparticles of the nicotine source and the tobacco microparticles are mixed together and preferably uniformly dispersed in the aerosol-forming substrate; 3. An aerosol-generating article (1) according to claim 1 or 2.

4. the relationship between the weight fraction of tobacco fine particles and the weight fraction of fine particles of the nicotine source in the aerosol-forming substrate is in the range of 95:5 to 40:60, preferably in the range of 90:10 to 50:50, more preferably in the range of 80:20 to 60:40, and most preferably in the range of 70:30, optionally ±≦5%, preferably ±≦2%; 2. An aerosol-generating article (1) according to claim 1.

5. the amount of tobacco particles and / or particles of the nicotine source in the aerosol-generating substrate is in the range of 0.5 to 30% by weight, preferably 1 to 15% by weight, more preferably 1 to 10% by weight, and most preferably 1 to 8% by weight of the total weight of the aerosol-generating article; 5. An aerosol-generating article (1) according to claim 4.

6. the average diameter of the plurality of channels is in the range of 50 μm to 1000 μm, preferably 75 μm to 750 μm, more preferably 100 μm to 500 μm, and most preferably 150 μm to 400 μm; An aerosol-generating article (1) according to any one of claims 1 to 5.

7. The number of channels is ≦50, preferably ≦20, more preferably ≦10, most preferably ≦6; An aerosol-generating article (1) according to any one of claims 1 to 6.

8. the mouth end segment (4) and / or the cooling element (3) comprises a filter element; The filter element is selected from the group including a hollow filter, a cavity filter, a filter plug, and combinations thereof. An aerosol-generating article (1) according to any one of claims 1 to 7.

9. the aerosol-generating substrate (2) further comprises a sheet tobacco material and / or a binder; The binder is preferably selected from the group comprising alginic acid, pectin, saccharose, starch and derivatives, cellulose and derivatives, gums, silica or silicone compounds, clays, polyvinyl alcohol and combinations thereof; An aerosol-generating article (1) according to any one of claims 1 to 8.

10. the mouth end segment (4) and / or the cooling element (3) further comprise an adsorbent; The adsorbent is preferably selected from the group comprising activated carbon, charcoal, silica gel, zeolites and combinations thereof. The aerosol-generating article according to any one of claims 1 to 9.

11. the mouth end segment (4) and / or the cooling element (3) are made from a material or material composition comprising a cellulose derivative and / or a polymer, The polymer is preferably selected from the group comprising polyesters, preferably polyhydroxyalkanoates (PHAs), more preferably polyhydroxybutyric acid (PHB), poly-4-hydroxybutyric acid (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO) and copolymers thereof, polysaccharides, preferably starches, more preferably thermoplastic starch (TPS), polylactic acid (PLA) and combinations thereof; An aerosol-generating article (1) according to any one of claims 1 to 10.

12. a1. Providing tobacco, grinding the tobacco to obtain tobacco fine particles, providing fine particles of a nicotine source, and then combining the tobacco fine particles with the fine particles of the nicotine source; b1. forming an aerosol-generating substrate (2) containing the tobacco fine particles; c1. Providing an oral end segment (4) and a cooling element, said cooling element including a plurality of channels extending at least partially essentially parallel to one another; d1. Forming the aerosol-generating article (1) by positioning the mouth end segment (4) and / or the cooling element (3) downstream of the aerosol-generating substrate (2) relative to the flow path of the aerosol so that the plurality of channels extend at least partially essentially parallel to the longitudinal direction of the aerosol-generating article; A method for producing an aerosol-generating article (1), preferably an aerosol-generating article (1) according to any one of claims 1 to 11, comprising:

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