Method of making a heat-not-burn cigarette and a cigarette

Abstract

The present application relates to the field of cigarette technology, and particularly relates to a production method of a heat-not-burn cigarette and a cigarette. The production method of the heat-not-burn cigarette comprises the following steps: common tobacco shred production: mixing a tobacco powder mixture with a porous fiber base material to press a common tobacco sheet with a set thickness, and cutting the common tobacco sheet to obtain common tobacco shreds; heat-conducting tobacco shred production: attaching a heat-conducting metal material on the common tobacco sheet or attaching the heat-conducting metal material on the porous fiber base material to obtain a heat-conducting sheet, the surface density of the heat-conducting sheet being the same as that of the common tobacco sheet, and cutting the heat-conducting sheet to obtain heat-conducting tobacco shreds; and cigarette production: uniformly mixing the heat-conducting tobacco shreds and the common tobacco shreds with a set proportion, and rolling the heat-conducting tobacco shreds and the common tobacco shreds into cigarettes by using a cigarette rolling machine. The present application can improve the heat-conducting performance of the cigarette while not increasing the suction resistance, increase the release amount of smoke during smoking, and ensure the consistency of the product.

Description

Technical Field

[0001] This invention relates to the field of cigarette technology, and in particular to a method for manufacturing a heated non-combustible cigarette and a cigarette stick. Background Technology

[0002] Heated tobacco products (HTMS) produce smoke by heating tobacco sheets. The smoke mainly consists of atomized glycerol / propylene glycol and flavorings. Because the tobacco material is not burned during use and only heated to below 500°C, the temperature is much lower than that of traditional cigarettes. Therefore, the smoke produced contains far fewer harmful chemical components and less biotoxicity than that of traditional tobacco.

[0003] The tobacco sheets of mainstream heated tobacco products are mainly made of a mixture of tobacco raw material powder, tobacco extract, tobacco flavorings, forming agents, smoke-generating agents, and binders. Tobacco sheets prepared in this way have a low thermal conductivity, so heat cannot be transferred quickly, and the smoke-generating agents evaporate slowly, which results in less smoke in the first few puffs and affects the smoking experience.

[0004] There is currently research on preparing thermally conductive sheets by pressing metal sheets onto one side of tobacco sheets. While this method can improve the thermal conductivity of the sheets, on the one hand, the sealing property of the metal sheets causes the pressed side of the sheets to lose air permeability, affecting the aerosol's penetration and resulting in less smoke and increased draw resistance. On the other hand, the areal density of the thermally conductive sheets with pressed metal sheets is different from that of ordinary sheets. When rolling cigarettes using traditional equipment, the thermally conductive sheets and ordinary sheets cannot be mixed evenly, thus affecting the consistency of the product.

[0005] Therefore, a method for manufacturing heated non-combustible cigarettes and a cigarette stick are needed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a method for manufacturing heated non-combustible cigarettes and a cigarette stick that improves the internal thermal conductivity of the cigarette stick without increasing the draw resistance, increases the amount of smoke released during inhalation, and ensures product consistency.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The method for manufacturing heated tobacco products includes the following steps:

[0009] Ordinary tobacco production

[0010] The tobacco powder mixture is pressed with a porous fiber substrate into ordinary tobacco sheets of a set thickness, and the ordinary tobacco sheets are cut into shreds to obtain ordinary tobacco shreds;

[0011] Thermal tobacco production

[0012] A thermally conductive sheet is obtained by attaching a thermally conductive metal material to a regular tobacco sheet or by attaching a thermally conductive metal material to a porous fiber substrate. The areal density of the thermally conductive sheet is the same as that of the regular tobacco sheet. The thermally conductive sheet is then cut into shreds to obtain thermally conductive tobacco shreds.

[0013] Cigarette manufacturing

[0014] The heat-conducting tobacco shreds with the same surface density are mixed evenly with the ordinary tobacco shreds in a set ratio, and then rolled into cigarettes by a cigarette rolling machine.

[0015] Furthermore, the tobacco powder mixture comprises tobacco powder, atomizing agent, binder, water, flavoring, and porous material, wherein the tobacco powder accounts for 25%-38%, the atomizing agent accounts for 15%-50%, the binder accounts for 1%-5%, the porous material accounts for 0%-7%, the flavoring accounts for 0%-10%, and the water accounts for 10%-30%.

[0016] Furthermore, the thermally conductive metal material is attached to the side of the ordinary tobacco sheet containing the tobacco powder mixture.

[0017] Furthermore, the porous fiber substrate is a fiber felt prepared from one or more of the following: high-temperature resistant cotton, hemp, corn, straw, and tobacco.

[0018] Furthermore, the porous fiber substrate is a high-temperature resistant fiber felt composed of PET and / or PA.

[0019] Furthermore, the thermally conductive metal material includes one or more of aluminum, copper, gold, and silver.

[0020] Furthermore, thermally conductive powder is incorporated into the production process of the thermally conductive sheet.

[0021] Furthermore, the thermally conductive powder includes one or more of aluminum nitride, silicon carbide, graphite, graphene, and carbon.

[0022] Furthermore, by adjusting the thickness of the porous fiber substrate and / or the thermally conductive metal material, the areal density of the thermally conductive sheet is made the same as that of the ordinary tobacco sheet.

[0023] The cigarette is made using the heating-non-combustible cigarette manufacturing method described above.

[0024] The beneficial effects of this invention are:

[0025] This invention provides a method for manufacturing heated tobacco products. The method involves pressing a mixture of tobacco powder and a porous fiber substrate into a sheet of ordinary tobacco of a predetermined thickness. The ordinary tobacco sheet is then shredded to obtain ordinary tobacco shreds. A heat-conducting sheet is obtained by attaching a thermally conductive metal material to the ordinary tobacco sheet or to the porous fiber substrate. The surface density of the heat-conducting sheet is the same as that of the ordinary tobacco sheet. This heat-conducting sheet is then shredded to obtain heat-conducting tobacco shreds. The heat-conducting tobacco shreds with the same surface density are then uniformly mixed with the ordinary tobacco shreds in a predetermined ratio and rolled into a cigarette using a cigarette rolling machine. By incorporating heat-conducting tobacco shreds into the ordinary tobacco shreds, and by adding the heat-conducting metal material to the tobacco shreds, the tobacco segments of the cigarette can be rapidly preheated, improving atomization efficiency and solving the problem of insufficient smoke in the first few puffs. The thermally conductive metal material is attached to the skeleton of ordinary tobacco sheets or porous fiber substrates, having minimal impact on the permeability of the tobacco sheets or porous fiber substrates themselves and not affecting aerosol penetration. This facilitates aerosol release during inhalation, increasing smoke output without increasing draw resistance. The uniform blending of thermally conductive tobacco shreds within the tobacco segments enhances the overall thermal conductivity, ensuring even heating and stable aerosol release, thus guaranteeing consistent smoke output per puff. Since the areal density of the thermally conductive sheet is the same as that of ordinary tobacco sheets, it allows for uniform mixing of the thermally conductive and ordinary tobacco shreds during cigarette rolling using conventional equipment, ensuring product consistency and facilitating industrial production.

[0026] The present invention provides a cigarette made using the heating non-combustible cigarette manufacturing method described above. This method improves the internal thermal conductivity of the cigarette without increasing the draw resistance, increases the amount of smoke released during inhalation, and ensures product consistency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0028] Figure 1 This is a flowchart of a method for manufacturing a heated non-combustible cigarette according to the present invention;

[0029] Figure 2 This is a schematic diagram of a heat-conducting sheet in a method for manufacturing a heated non-combustible cigarette according to the present invention;

[0030] Figure 3 This is a schematic diagram of another heat-conducting sheet in the manufacturing method of a heated non-combustible cigarette of the present invention;

[0031] Figure 4This is a schematic diagram comparing the puff-by-puff test results of the heated non-combustible cigarettes prepared in Example 2, Example 4 and Comparative Example 1, respectively, in this invention.

[0032] In the picture:

[0033] 11. Porous fiber substrate; 12. Tobacco powder mixture; 13. Thermally conductive metal material. Detailed Implementation

[0034] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0035] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0036] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0037] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0038] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0039] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0040] In the production of heated tobacco products, in order to improve the internal thermal conductivity of the cigarette without increasing draw resistance, increase the amount of smoke released during inhalation, and ensure product consistency, such as... Figures 1-3 As shown, this invention provides a method for manufacturing heated tobacco products. The method for manufacturing heated tobacco products includes the following steps:

[0041] Ordinary tobacco production

[0042] The tobacco powder mixture 12 and the porous fiber substrate 11 are pressed into ordinary tobacco sheets of a set thickness, and the ordinary tobacco sheets are cut into shreds to obtain ordinary tobacco shreds; the thickness of the porous fiber substrate can be 0.1mm-0.5mm.

[0043] Thermal tobacco production

[0044] A thermally conductive sheet is obtained by attaching a thermally conductive metal material 13 to a regular tobacco sheet or to a porous fiber substrate 11. The areal density of the thermally conductive sheet is the same as that of the regular tobacco sheet. The thermally conductive sheet is then cut into shreds to obtain thermally conductive tobacco shreds. The areal density of the thermally conductive tobacco shreds is in the range of 30 g / m³. 2 -500 g / m 2 The adhesion thickness of the thermally conductive metal material 13 can be adjusted according to actual needs, and the thickness of the thermally conductive metal material 13 is smaller than the pore size of the porous fiber substrate, thereby ensuring air permeability.

[0045] Cigarette manufacturing

[0046] Heat-conducting tobacco with uniform surface density is mixed evenly with ordinary tobacco in a set ratio and then rolled into cigarettes using a cigarette rolling machine.

[0047] By incorporating heat-conducting tobacco shreds into ordinary tobacco shreds, these shreds possess a heat-conducting metal material 13, allowing for rapid preheating of the tobacco segments in the cigarette, improving atomization efficiency, and addressing the issue of insufficient smoke volume in the first few puffs. The heat-conducting metal material 13 adheres to the skeleton of the ordinary tobacco sheet or porous fiber substrate 11, having minimal impact on the permeability of the ordinary tobacco sheet or porous fiber substrate 11 itself, and does not affect aerosol penetration. This facilitates aerosol release during inhalation, increasing smoke volume without increasing draw resistance. The uniform incorporation of heat-conducting tobacco shreds within the tobacco segments ensures a uniform improvement in thermal conductivity throughout the entire segment, resulting in balanced heating and stable aerosol release, guaranteeing consistent smoke volume with each puff. Since the surface density of the heat-conducting sheet is the same as that of the ordinary tobacco sheet, the heat-conducting tobacco shreds and ordinary tobacco shreds can be uniformly mixed during cigarette rolling using conventional cigarette rolling equipment, ensuring product consistency and facilitating industrial production.

[0048] Furthermore, such as Figure 2 As shown, the thermally conductive metal material 13 is attached to the side of a regular tobacco sheet containing the tobacco powder mixture 12. When heated, the thermally conductive metal material 13 can directly act on the tobacco powder mixture 12, allowing the tobacco mixture to heat up quickly and release aerosols.

[0049] Furthermore, the tobacco powder mixture 12 comprises tobacco powder, atomizing agent, binder, water, flavoring, and porous material. The tobacco powder accounts for 25%-38%, the atomizing agent for 15%-50%, the binder for 1%-5%, the porous material for 0%-7%, the flavoring for 0%-10%, and the water for 10%-30%. Specifically, the tobacco powder mixture 12 is flexibly configured with the amounts of tobacco powder, atomizing agent, binder, water, flavoring, and porous material in 100% proportions. This caters to the needs of people of different ages and with different smoking habits.

[0050] Furthermore, the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0051] Furthermore, in some embodiments, the porous fiber substrate 11 is a fiber felt prepared from one or more of the following: high-temperature resistant cotton, hemp, corn, straw, and tobacco. By using the above materials to make the porous fiber substrate 11, the permeability of the porous fiber substrate 11 can be guaranteed, so as not to increase the draw resistance after it is made into tobacco.

[0052] Furthermore, in some other embodiments, the porous fiber substrate 11 is a high-temperature resistant fiber felt composed of PET (polyethylene terephthalate) and / or PA (nylon). The porous fiber substrate 11 made from the above materials exhibits excellent physical and mechanical properties over a wide temperature range, while also ensuring the permeability of the porous fiber substrate 11, thus not increasing draw resistance after being made into tobacco shreds.

[0053] Furthermore, the thermally conductive metal material 13 includes one or more of aluminum, copper, gold, and silver. An alloy of these materials can also be used as the thermally conductive metal material 13. By fully utilizing the good thermal conductivity of aluminum, copper, gold, and silver, the cigarette can be guaranteed to have excellent thermal conductivity, thus ensuring a good smoking experience.

[0054] Furthermore, in some embodiments, thermally conductive powder is incorporated during the fabrication of the thermally conductive sheet. The thermally conductive powder includes one or more of aluminum nitride, silicon carbide, graphite, graphene, and carbon. By incorporating thermally conductive powder during the fabrication of the thermally conductive sheet, the thermal conductivity of the thermally conductive tobacco shreds can be further improved, thereby ensuring that the cigarette has good thermal conductivity. In another embodiment, thermally conductive powder can also be incorporated directly during the fabrication of ordinary tobacco sheets, or it can be incorporated into the porous fiber substrate 11 and then pressed using a roller press to obtain the thermally conductive sheet; no further limitations are imposed here.

[0055] Furthermore, by adjusting the thickness of the porous fiber substrate 11 and / or the thermally conductive metal material 13, the areal density of the thermally conductive sheet is made the same as that of ordinary tobacco sheets. In this way, a thermally conductive sheet with the same areal density as ordinary tobacco sheets can be quickly obtained. In the subsequent cigarette manufacturing process, the thermally conductive tobacco shreds are uniformly mixed with ordinary tobacco shreds, and then processed into heated tobacco products using ordinary cigarette-making equipment, facilitating mass production.

[0056] Furthermore, this manufacturing method was tested through experiments and comparisons. The testing process is as follows:

[0057] Example 1

[0058] 1) By weight, it contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol ratio of 3:7), binder (8 parts sodium alginate, 5 parts diatomaceous earth), 5 parts peppermint flavoring, and 24 parts water.

[0059] 2) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 40 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the cotton fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 100g / m³ is obtained. 2Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0060] 3) At a surface density of 90 g / m³ 2 Metallic aluminum was deposited on the surface of cotton fiber felt (0.23 mm thick), and the deposition thickness of aluminum was adjusted to obtain 100 g / m². 2 The thermally conductive sheet has an attached aluminum layer that does not affect its air permeability. The thermally conductive sheet is then cut into 1mm wide thermally conductive tobacco shreds using a shredder.

[0061] 4) Heat-conducting tobacco and ordinary tobacco are mixed evenly in a 1:1 ratio and rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm by a cigarette rolling machine.

[0062] Example 2

[0063] 1) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), binder (8 parts sodium alginate and 5 parts diatomaceous earth), 5 parts peppermint flavoring, and 24 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0064] 2) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 40 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the cotton fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 150g / m³ is obtained. 2 Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0065] 3) After the tobacco powder mixture 12 obtained in step 1) is mixed evenly using a mixer, the mixture is then subjected to a surface density of 40 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the cotton fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 140g / m³ is obtained. 2 Ordinary tobacco sheets were then coated with metallic aluminum. The coating thickness was adjusted to achieve 150 g / m². 2 The thermally conductive sheet has aluminum attached to it, which does not affect the sheet's air permeability. The thermally conductive sheet is then cut into 1mm wide thermally conductive tobacco shreds using a shredder.

[0066] 4) Heat-conducting tobacco and ordinary tobacco are mixed evenly in a 1:1 ratio and rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm by a cigarette rolling machine.

[0067] Example 3

[0068] 1) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), binder (8 parts sodium alginate and 5 parts diatomaceous earth), 5 parts peppermint flavoring, and 24 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0069] 2) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 50 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the hemp fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 150g / m³ is obtained. 2 Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0070] 3) At a surface density of 130 g / m³ 2 Metallic silver was deposited on the surface of hemp fiber felt (0.26 mm thick), and the silver deposition thickness was adjusted to obtain 150 g / m². 2 The thermally conductive sheet has silver coating that does not affect its air permeability. The thermally conductive sheet is then cut into 1mm wide thermally conductive tobacco shreds using a shredder.

[0071] 4) Heat-conducting tobacco and ordinary tobacco are mixed evenly in a 2:1 ratio and rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm by a cigarette rolling machine.

[0072] Example 4

[0073] 1) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), binder (8 parts sodium alginate and 5 parts diatomaceous earth), 5 parts peppermint flavoring, and 24 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0074] 2) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 50 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the hemp fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 150g / m³ is obtained. 2 Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0075] 3) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol ratio 3:7), 8 parts sodium alginate binder, 10 parts silicon carbide and aluminum nitride thermal conductive powder, 5 parts peppermint flavoring, and 19 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0076] 4) After the tobacco powder mixture 12 obtained in step 3) is mixed evenly using a mixer, the mixture is then subjected to a surface density of 50 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the hemp fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 150g / m³ is obtained. 2 The heat-conducting tobacco sheet is cut into 1mm wide shreds using a shredder.

[0077] 5) Heat-conducting tobacco and ordinary tobacco are mixed evenly in a 1:2 ratio and rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm by a cigarette rolling machine.

[0078] Example 5

[0079] 1) By mass, the tobacco powder mixture 12 contains the following components: 25 parts tobacco powder, 25 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), 10 parts carboxymethyl cellulose binder, 10 parts peppermint flavoring, and 30 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0080] 2) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 100g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the hemp fiber felt (thickness 0.2mm) using a roller press, and after drying, a surface density of 200g / m³ is obtained. 2 Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0081] 3) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), 8 parts carboxymethyl cellulose binder, 10 parts silicon carbide and aluminum nitride thermal conductive powder, 5 parts peppermint flavoring, and 19 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0082] 4) After mixing the above tobacco powder mixture 12 evenly using a mixer, the surface density is 100 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the hemp fiber felt (thickness 0.2mm) using a roller press, and after drying, a surface density of 200g / m³ is obtained. 2 The heat-conducting sheet is then cut into 1mm wide heat-conducting tobacco shreds using a shredder.

[0083] 5) Heat-conducting tobacco and ordinary tobacco are mixed evenly in a 1:3 ratio and rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm by a cigarette rolling machine.

[0084] Comparative Example 1

[0085] 1) By mass, the tobacco powder mixture 12 contains the following components: 38 parts tobacco powder, 20 parts atomizing agent (propylene glycol to glycerol in a ratio of 3:7), binder (8 parts sodium alginate and 5 parts diatomaceous earth), 5 parts peppermint flavoring, and 24 parts water; the average mesh size of the tobacco powder is 50-100 mesh, obtained by grinding tobacco fibers.

[0086] 2) After mixing the above mixture thoroughly using a mixer, the surface density should be 40 g / m³. 2 The above-mentioned tobacco powder mixture 12 is pressed onto the surface of the cotton fiber felt (thickness 0.1mm) using a roller press, and after drying, a surface density of 150g / m³ is obtained. 2 Ordinary tobacco sheets are cut into 1mm wide shreds using a shredder to obtain ordinary tobacco shreds.

[0087] 3) The cigarettes are rolled into cigarettes with a tobacco length of 12mm and a diameter of 7.5mm using a cigarette rolling machine.

[0088] Experimental testing:

[0089] The cigarette samples in the above embodiments were tested for thermal conductivity, draw resistance, and smoke release.

[0090] Test 1 measures the length of carbonized tobacco inside the cigarette after heating. The specific method is as follows: Connect the cigarette sample to an airflow-type heated tobacco device and smoke it using a linear smoking machine according to the smoking parameters specified in standard YC / T29-1996. After 15 puffs, stop heating and remove the cigarette sample to measure the length of the carbonized tobacco. Because the hot airflow generated by the airflow-type heated tobacco device results in heat loss during transmission, when the tobacco's thermal conductivity is poor, the parts of the tobacco farther from the heat source receive less heat, resulting in a shorter carbonized portion. Conversely, when the tobacco's thermal conductivity is good, the tobacco is heated more evenly, resulting in a longer carbonized portion.

[0091] Test 2: Test the time it takes for the inside of the tobacco to reach 180°C. The specific test method is as follows: Connect the tobacco sample to an airflow-type heated non-combustible tobacco device, fix the thermocouple probe at the same position on the tobacco section to measure the temperature, start the device and start timing, and record the time required for the inside of the tobacco to reach 180°C. The shorter the time, the better the thermal conductivity of the tobacco.

[0092] Test 3: Test the draw resistance of the cigarette. The specific test method is as follows: Use a comprehensive cigarette physical index testing platform to test the draw resistance of the sample cigarette.

[0093] As shown in Table 1, the test results of thermal conductivity reflect that the thermal conductivity of the heated tobacco sticks made using this method has been improved, and the test results of draw resistance reflect that the draw resistance of the heated tobacco sticks made using this method is close to that of the ordinary heated tobacco sticks in the comparative example.

[0094] Table 1. Results of thermal conductivity and absorption resistance tests

[0095] example Length of carbonized tobacco shreds (mm) Time (in seconds) required for tobacco to reach 180°C Suction resistance (Pa) Example 1 10.3 21 434±21 Example 2 10.0 22 447±22 Example 3 11.2 17 405±20 Example 4 9.2 27 460±22 Example 5 9.0 29 479±19 Comparative Example 1 8.8 31 467±17

[0096] Test 4: Testing the amount of smoke released per puff during cigarette smoking. The specific test method is as follows: Connect the cigarette sample to an airflow-type heated non-combustible smoking device, set the number of puffs to 15, and conduct a smoking experiment on a linear smoking machine according to standard YC / T29-1996. Each puff channel only captures the aerosol released from one puff. The increase in weight of the collector in that channel reflects the amount of aerosol released in that puff; the greater the increase in weight, the more aerosol was released in that puff, and the greater the amount of smoke. The test results are as follows. Figure 4 As shown, based on the puff-by-puff weight gain results of the trap, the puff-by-puff aerosol release amounts in Examples 2 and 4 are greater than those in Comparative Example 1, and the puff-by-puff release amounts are more stable, resulting in a better puff-by-puff consistency experience. This indicates that the thermal conductivity of the cigarette has been improved, and the overall heating is more even and sufficient, thus allowing for stable aerosol release. Furthermore, the adhesion of the thermally conductive material does not affect the permeability of the sheet itself, does not affect the aerosol penetration between the sheets, does not increase draw resistance, and is beneficial for aerosol release.

[0097] The above tests show that the thermal conductivity of the heated tobacco sticks made using this method is improved.

[0098] This embodiment also provides a cigarette made using the above-described method for manufacturing heated non-combustible cigarettes. This method improves the internal thermal conductivity of the cigarette without increasing the draw resistance, increases the amount of smoke released during inhalation, and ensures product consistency.

[0099] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for producing heated non-combustible cigarettes, characterized in that, Includes the following steps: Ordinary tobacco production The tobacco powder mixture (12) and the porous fiber substrate (11) are pressed into ordinary tobacco sheets of a set thickness, and the ordinary tobacco sheets are cut into shreds to obtain ordinary tobacco shreds; Thermal tobacco production A thermally conductive sheet is obtained by attaching a thermally conductive metal material (13) to the ordinary tobacco sheet. The surface density of the thermally conductive sheet is the same as that of the ordinary tobacco sheet. The thermally conductive sheet is then cut into shreds to obtain thermally conductive tobacco shreds. Cigarette manufacturing The heat-conducting tobacco shreds with a uniform surface density are mixed with ordinary tobacco shreds in a set ratio and rolled into cigarettes using a cigarette rolling machine. The thermally conductive metal material (13) is attached to the side of the ordinary tobacco sheet having the tobacco powder mixture (12); The tobacco powder mixture (12) includes tobacco powder, atomizing agent, binder, water, flavoring, and porous material. The tobacco powder accounts for 25%-38%, the atomizing agent accounts for 15%-50%, the binder accounts for 1%-5%, the porous material accounts for 0%-7%, the flavoring accounts for 0%-10%, and the water accounts for 10%-30%. The porous fiber substrate (11) is a fiber felt prepared from one or more of the following: high-temperature resistant cotton, hemp, corn, straw, and tobacco.

2. The method for producing heated non-combustible cigarettes according to claim 1, characterized in that, Thermally conductive metal materials (13) include one or more of aluminum, copper, gold, and silver.

3. The method for producing heated non-combustible cigarettes according to claim 1, characterized in that, Thermally conductive powder is incorporated during the fabrication of the thermally conductive sheet.

4. The method for producing heated non-combustible cigarettes according to claim 3, characterized in that, The thermally conductive powder includes one or more of aluminum nitride, silicon carbide, graphite, graphene, and carbon.

5. The method for producing heated non-combustible cigarettes according to claim 1, characterized in that, By adjusting the thickness of the porous fiber substrate (11) and / or the thermally conductive metal material (13), the areal density of the thermally conductive sheet is made the same as that of the ordinary tobacco sheet.

6. A cigarette, characterized in that, It is made using the method for producing heated non-combustible cigarettes as described in any one of claims 1-5.

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