Heating cigarette with high puff-by-puff consistency and application thereof

Abstract

The invention provides a heating cigarette with high puff-by-puff consistency and application thereof. The heating cigarette comprises a first fuming unit, a second fuming unit, a cooling unit and a filter tip unit which are sequentially connected, and the two sides of the cigarette paper of the first smoke generating unit are coated with temperature control materials. By using the temperature control material, the radiation and conduction rate of heat from the cigarette paper to the cigarette core material is slowed down, no offensive odor is generated, the internal temperature of the cigarette core material can be effectively controlled, the aerosol release amount of the heated cigarette before and after smoking is balanced, the puff-by-puff consistency before and after smoking is improved, and better smoking experience is brought to consumers.

Description

Technical Field

[0001] The invention belongs to the technical field of heated cigarette preparation, and in particular relates to a heated cigarette with high puff-by-puff consistency and an application thereof. Background Art

[0002] With the improvement of people's health awareness and the need to ban smoking in public places, consumers' demand for low-harm cigarettes is increasing. Unlike traditional cigarette products that use high-temperature combustion, heated cigarettes use low-temperature heating technology, which will reduce harmful ingredients accordingly. Therefore, the emergence of heated cigarettes has been favored by consumers. Heated cigarettes, also known as low-temperature cigarettes, are a new type of tobacco product. The main feature is that the heating temperature is lower than 350℃. At this temperature, nicotine and other flavor components in tobacco are volatilized to produce aerosols, thus meeting the needs of smokers.

[0003] Heated cigarettes generally generate heat through electric heating elements, which heat and distill the tobacco material in the cartridge to provide smoke. The existing mainstream heating technology solutions are one of central heating technology using heating rods (sheets, needles), and the other is surrounding heating technology using cavity heating. Due to the large heat transfer area of ​​the surrounding heating technology, heat is released in a concentrated manner. The effective ingredients in the tobacco material tend to be released in the front part of the suction, causing the effective ingredients in the tobacco material to be completely distilled during the latter part of the suction process, reducing the aroma and smoke concentration, and the puff-by-puff stability, which reduces the consumer's consumption experience. In order to solve this problem, scientific and technological workers have also conducted research and reported the research results.

[0004] Patent CN202311225316.6 discloses a method for improving the stability of smoke release from heated cigarettes. The method compounds smoke-releasing particles of different bulk densities obtained by different granulation processes to regulate the bulk density of the smoke-releasing material used in the heated cigarettes. This avoids obvious sensory quality defects such as rapid smoke attenuation or slow smoke release during heating caused by particles prepared by a single process having too low or too high bulk density. The heated cigarettes have the advantages of sufficient smoke in the early stage of smoking (1 to 5 puffs), obvious no smoke attenuation in the later stage of smoking (10 to 14 puffs), consistent aroma, and prominent style characteristics. This solves the sensory problem of unstable smoke release from granular heated cigarettes currently on the market.

[0005] Patent CN202410604038.3 relates to a production process for naturally shrinking heated cigarette reconstituted tobacco leaves. The invention regulates the drying temperature of the heated cigarette slices during processing, resulting in a thickness gradient distribution of the heated cigarette slices. Under the action of surface tension, the slices naturally shrink to produce a material with a difference in thickness and density in a single direction, and are relatively uniform in another direction, so that the slices naturally shrink in a wavy shape. The heated cigarette slices have a low density after drying and expansion, and have the characteristics of fast heating rate and uniform heat transfer in the same heat flux heating regulation, which solves the problem of poor lateral heat transfer and insufficient release of effective substances in the existing slice-rolled smoking section materials, and at the same time provides technical support for improving the puff-by-puff stability of smoke.

[0006] Patent CN202410414395.3 discloses a heated cigarette capsule, a heated cigarette, and a method for manufacturing a heated cigarette capsule. The heated cigarette capsule includes: an inner core and an outer wall wrapping the inner core; the inner core uses a core material containing flavor substances; at least part of the outer wall uses a wall material with a melting point lower than the temperature of the smoke generated after heating the smoking substrate during inhalation, so that when the outer wall contacts the smoke, at least part of the outer wall melts, and the inner core releases the flavor substances from the melted position. The invention constructs part or all of the outer wall of the capsule with a material with a specified melting temperature to wrap the core material containing flavor substances. When the temperature is below the melting point, the outer wall can provide high sealing, and when the temperature is above the melting point, part or all of the outer wall will melt into liquid, allowing the contents of the core material to be released. This controlled release mechanism can ensure that the flavor is continuously released in a controlled manner over a period of time, which greatly improves the flavor uniformity of the heated cigarette puff by puff.

[0007] It can be found that solving the problem of puff-by-puff consistency of heated cigarette aerosol is a technical problem in the industry. Therefore, how to provide a method to solve the problem of concentrated heat generated by heated cigarettes around the edges, which causes a large reduction in the effective ingredients of tobacco materials in the later stage of smoking, has become an urgent problem to be solved. Summary of the invention

[0008] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a heated cigarette with high puff-by-puff consistency and its application. The present invention uses temperature control materials to slow down the rate of heat radiation and conduction from cigarette paper to the core material, and does not generate impurities, which can effectively control the internal temperature of the core material, balance the aerosol release of the heated cigarette before and after smoking, improve the consistency of each puff before and after smoking, and bring consumers a better smoking experience.

[0009] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0010] In one aspect, the present invention provides a heated cigarette with high puff-by-puff consistency, the heated cigarette comprising a first smoking unit, a second smoking unit, a cooling unit and a filter unit connected in sequence;

[0011] The cigarette paper of the first smoking unit is coated with temperature control material on both sides.

[0012] The above method slows down the rate of heat radiation and conduction from cigarette paper to the core material by using temperature control materials, and does not generate impurities. It can effectively control the internal temperature of the core material, balance the aerosol release of the heated cigarette before and after smoking, improve the consistency of each puff before and after smoking, and bring consumers a better smoking experience.

[0013] Preferably, the first smoking unit is prepared by a method comprising the following steps:

[0014] The temperature control material is mixed with an adhesive and water to obtain a temperature control suspension, and then the temperature control suspension is coated on both sides of the cigarette paper. After drying, the cigarette paper is wrapped with the cigarette core material to obtain the first smoking unit.

[0015] The first smoking unit slows down the rate of heat radiation and conduction from the cigarette paper to the cigarette core material by using temperature control materials, and starts to fully heat in the middle of smoking, which makes it different from the second smoking unit and improves the consistency before and after smoking.

[0016] Preferably, the temperature control material comprises any one of alumina aerogel, silica aerogel, expanded vermiculite powder, expanded perlite powder or calcium silicate powder, or a combination of at least two thereof, preferably a combination of alumina aerogel and silica aerogel.

[0017] The above-mentioned specific temperature control materials further enhance the effectiveness of the product.

[0018] Preferably, the mass ratio of the alumina aerogel to the silica aerogel is (3-4):(1-2), wherein the number of alumina aerogels can be 3, 3.2, 3.4, 3.6, 3.8 or 4, etc., and the number of silica aerogels can be 1, 1.2, 1.4, 1.6, 1.8 or 2, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0019] Preferably, the mass ratio of the temperature control material to the adhesive is (100-350):(2-5), wherein the number of portions of the temperature control material can be 100, 150, 200, 250, 300 or 350, etc., and the number of portions of the adhesive can be 2, 3, 4 or 5, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0020] Preferably, the coating area of ​​the temperature-controlled suspension on both sides of the cigarette paper is 50-100% of the surface area of ​​the cigarette paper, such as 50%, 60%, 70%, 80%, 90% or 100%, but is not limited to the above-listed values. Other values ​​not listed in the above numerical range are also applicable.

[0021] Preferably, the thickness of the coating after drying is 0.05-0.25 mm.

[0022] Preferably, the second smoking unit is prepared by a method comprising the following steps:

[0023] The heat conductive filler is mixed with an adhesive and water to obtain a heat conductive suspension, which is then coated on both sides of the cigarette paper. After drying, the cigarette paper is wrapped with a cigarette core material to obtain the second smoking unit; the cigarette core material is coated or soaked on both sides with the heat conductive suspension.

[0024] When the coating method is adopted, the amount of the heat conductive filler applied is 6-10% of the mass of the cigarette core material; when the impregnation method is adopted, the amount of the heat conductive filler applied is 1.5-5% of the mass of the cigarette core material.

[0025] The above-mentioned heat-conductive filler can effectively improve the heat conduction efficiency of the second smoking unit, so as to effectively distinguish the heating conditions of the second smoking unit from those of the first smoking unit in the front stage of smoking, and ensure that the aerosol formed by the heating of the first smoking unit in the rear stage of smoking will not be excessively condensed when passing through the second smoking unit, and can continue to be transmitted quickly, thereby ensuring the consistency before and after the smoking.

[0026] Preferably, the thermally conductive filler comprises any one of boron nitride, graphene oxide, zinc oxide, aluminum nitride or carbon nanotubes, or a combination of at least two thereof, preferably a combination of boron nitride and graphene oxide.

[0027] The above-mentioned specific thermally conductive fillers further enhance the effect of the product.

[0028] Preferably, the mass ratio of boron nitride to graphene oxide is (3-4):(6-7), wherein the proportion of boron nitride can be 3.2, 3.4, 3.6, 3.8 or 4, and the proportion of graphene oxide can be 6, 6.2, 6.4, 6.6, 6.8 or 7, but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0029] Preferably, the mass ratio of the thermally conductive filler to the adhesive is (50-250):(1-5), wherein the number of portions of the thermally conductive filler can be 50, 100, 150, 200 or 250, etc., and the number of portions of the adhesive can be 1, 2, 3, 4 or 5, etc., but are not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0030] Preferably, the coating area of ​​the thermally conductive suspension on both sides of the cigarette paper is 80-100% of the surface area of ​​the cigarette paper, such as 80%, 85%, 90%, 95% or 100%, but is not limited to the above values, and other values ​​not listed in the above range are also applicable.

[0031] Preferably, the coating area or wetting area of ​​the cigarette core material after double-sided coating or impregnation with the thermal conductive suspension is independently 80-100% of the surface area of ​​the cigarette core material, for example 80%, 85%, 90%, 95% or 100%, etc., but is not limited to the values ​​listed above, and other values ​​not listed within the above numerical range are also applicable.

[0032] Preferably, the binder comprises any one of guar gum, locust bean gum, carboxymethyl cellulose or sodium alginate, or a combination of at least two thereof.

[0033] Preferably, the length ratio of the first smoking unit to the second smoking unit is (1-2):1, such as 1:1, 1.2:1, 1.4:1, 1.6:1, 1.8:1 or 2:1, but is not limited to the above-listed values. Other values ​​not listed within the above-listed range are also applicable.

[0034] During the smoking process, after the smoking device is started, the second smoking unit is heated first to produce aerosol. In the middle of the smoking process, the cigarette paper of the first smoking unit is destroyed, and the heat is quickly transferred to the section of the cigarette core material. At this time, the section of the cigarette core material is fully heated and releases a large amount of aerosol. When the aerosol generated by the first smoking unit passes through the second smoking unit, at this time, although the thermal conductivity of the cigarette core material of the second smoking unit will decrease after carbonization, because the cigarette core material and cigarette paper of the second smoking unit are added with thermal conductive fillers, the heat passing through the second smoking unit can still be quickly transferred, so the aerosol generated by the first smoking unit will not be condensed too much in the second smoking unit. This ensures the smoking consistency before and after the smoking.

[0035] The cigarette core material includes tobacco flakes, tobacco shreds, tobacco particles (when the cigarette core material is tobacco shreds or tobacco particles, the heat-conducting suspension can also be applied in the form of spraying), etc.

[0036] On the other hand, the present invention provides the use of the heated cigarette as described above in the preparation of heated cigarettes.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides a heated cigarette with high puff-by-puff consistency. By using a temperature control material, the rate of heat radiation and conduction from cigarette paper to a cigarette core material is slowed down without generating impurities. The internal temperature of the cigarette core material can be effectively controlled, and the aerosol release amount of the heated cigarette before and after smoking is balanced, thereby improving the puff-by-puff consistency before and after smoking, and bringing a better smoking experience to consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of the heated cigarette provided in Examples 1-3. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0041] In the following examples, alumina aerogel and silica aerogel were purchased from Hunan Ronglan Intelligent Technology Co., Ltd.;

[0042] Graphene oxide was purchased from Beijing Dekedaojin Technology Co., Ltd.

[0043] Example 1

[0044] This embodiment provides a heated cigarette, and its structural schematic diagram is as follows Figure 1 shown.

[0045] The preparation method is as follows:

[0046] (1) Mixing a temperature control material (alumina aerogel and silica aerogel, with a mass ratio of 3.5:1.5) with a binder (guar gum) and water to obtain a temperature control suspension (temperature control material mass fraction 2.5%, binder mass fraction 0.03%), coating 100% of the temperature control suspension on both sides of cigarette paper, drying, and coating thickness 0.2 mm; then wrapping the cigarette paper and the tobacco sheet substrate with each other to obtain a first smoking unit;

[0047] (2) mixing a thermally conductive filler (boron nitride and graphene oxide, mass ratio 3.5:6.5) with a binder (guar gum) and water to obtain a thermally conductive suspension (thermal conductive filler mass fraction 2%, binder mass fraction 0.03%), coating 100% of the thermally conductive suspension on both sides of a cigarette paper and a tobacco sheet substrate (the coating amount is 8% of the mass of the cigarette paper and the tobacco sheet substrate), drying, and then wrapping the cigarette paper and the tobacco sheet substrate to obtain a second smoking unit;

[0048] (3) The first smoking unit, the second smoking unit, the cooling unit, and the filter unit are sequentially spliced ​​to obtain the heated cigarette, with a total length of 45 mm and a circumference of 22.6 mm. Among them, the total length of the first smoking unit and the second smoking unit is 12 mm (length ratio 1.5:1); the cooling unit is a hollow structure with a hole diameter of 3.7 mm, and the outer material is formed by 75% diacetate cellulose tow with 15% triacetin, and the length is 23 mm; the filter unit is formed by 92% diacetate cellulose tow with 8% triacetin, and the length is 10 mm.

[0049] Example 2

[0050] This embodiment provides a heated cigarette, and its structural schematic diagram is as follows Figure 1 shown.

[0051] The preparation method is as follows:

[0052] (1) Mixing a temperature control material (alumina aerogel and silica aerogel, with a mass ratio of 3:2) with a binder (guar gum) and water to obtain a temperature control suspension (temperature control material mass fraction 3.5%, binder mass fraction 0.02%), coating 50% of the temperature control suspension on both sides of cigarette paper, drying, and coating thickness 0.05 mm; then wrapping the cigarette paper and the tobacco sheet substrate with each other to obtain a first smoking unit;

[0053] (2) mixing a thermally conductive filler (boron nitride and graphene oxide, in a mass ratio of 4:6) with a binder (guar gum) and water to obtain a thermally conductive suspension (the mass fraction of the thermally conductive filler is 2.5%, the mass fraction of the binder is 0.01%), coating 90% of the thermally conductive suspension on both sides of the cigarette paper and the tobacco sheet substrate (the coating amount is 6% of the mass of the cigarette paper and the tobacco sheet substrate), drying, and then wrapping the cigarette paper and the tobacco sheet substrate to obtain a second smoking unit;

[0054] (3) The first smoking unit, the second smoking unit, the cooling unit, and the filter unit are sequentially spliced ​​to obtain the heated cigarette, with a total length of 45 mm and a circumference of 22.6 mm. Among them, the total length of the first smoking unit and the second smoking unit is 12 mm (length ratio 2:1); the cooling unit is a hollow structure with a hole diameter of 3.7 mm, and the outer material is formed by 75% diacetate cellulose tow with 15% triacetin, and the length is 23 mm; the filter unit is formed by 92% diacetate cellulose tow with 8% triacetin, and the length is 10 mm.

[0055] Example 3

[0056] This embodiment provides a heated cigarette, and its structural schematic diagram is as follows Figure 1 shown.

[0057] The preparation method is as follows:

[0058] (1) Mixing a temperature control material (alumina aerogel and silica aerogel, with a mass ratio of 4:1) with a binder (guar gum) and water to obtain a temperature control suspension (temperature control material mass fraction 1%, binder mass fraction 0.05%), coating 80% of the temperature control suspension on both sides of cigarette paper, drying, and coating thickness 0.25 mm; then wrapping the cigarette paper and the tobacco sheet substrate with each other to obtain a first smoking unit;

[0059] (2) mixing a thermally conductive filler (boron nitride and graphene oxide, mass ratio 3:7) with a binder (guar gum) and water to obtain a thermally conductive suspension (thermal conductive filler mass fraction 0.5%, binder mass fraction 0.05%), coating 80% of the thermally conductive suspension on both sides of a cigarette paper and a tobacco sheet substrate (the coating amount is 10% of the mass of the cigarette paper and the tobacco sheet substrate), drying, and then wrapping the cigarette paper and the tobacco sheet substrate to obtain a second smoking unit;

[0060] (3) The first smoking unit, the second smoking unit, the cooling unit, and the filter unit are sequentially spliced ​​to obtain the heated cigarette, with a total length of 45 mm and a circumference of 22.6 mm. Among them, the total length of the first smoking unit and the second smoking unit is 12 mm (length ratio 1:1); the cooling unit is a hollow structure with a hole diameter of 3.7 mm, and the outer material is formed by 75% diacetate cellulose tow with 15% triacetin, and the length is 23 mm; the filter unit is formed by 92% diacetate cellulose tow with 8% triacetin, and the length is 10 mm.

[0061] Example 4

[0062] This embodiment provides a heated cigarette, wherein the preparation steps are the same as those of Embodiment 1, except that step (1) does not contain alumina aerogel and a reduced portion is allocated to silica aerogel.

[0063] Example 5

[0064] This embodiment provides a heated cigarette, wherein the preparation steps are the same as those of Embodiment 1, except that step (1) does not contain silica aerogel and a reduced portion is allocated to alumina aerogel.

[0065] Example 6

[0066] This embodiment provides a heated cigarette, wherein the preparation steps are the same as those of Embodiment 1, except that step (2) does not contain boron nitride and a reduced portion is allocated to graphene oxide.

[0067] Example 7

[0068] This embodiment provides a heated cigarette, wherein the preparation steps are the same as those of Embodiment 1, except that step (2) does not contain graphene oxide and a reduced portion is allocated to boron nitride.

[0069] Example 8

[0070] This embodiment provides a heated cigarette, and the preparation steps are the same as those of Embodiment 1 except that in step (2), the cigarette paper is not coated with the thermally conductive suspension.

[0071] Example 9

[0072] This embodiment provides a heated cigarette, and the preparation steps are the same as those of Embodiment 1 except that in step (2), the tobacco sheet substrate is not coated with the thermally conductive suspension.

[0073] Comparative Example 1

[0074] This comparative example provides a heated cigarette, and the preparation steps are the same as those of Example 1, except that the cigarette paper is not coated with the temperature-controlled suspension in step (1).

[0075] Comparative Example 2

[0076] This comparative example provides a heated cigarette, which is consistent with Example 1 except that the positions of the first smoking unit and the second smoking unit are swapped.

[0077] Effect test:

[0078] The heated cigarettes provided in Examples 1-9 and Comparative Examples 1-2 were tested for smoking consistency, and the test method was as follows:

[0079] (1) Materials and instruments

[0080] Materials: smoking utensils; different heated cigarettes; 44mm Cambridge filter.

[0081] Instruments: RM20H turntable smoking machine (equipped with a puff-by-puff module, Borgwaldt, Germany); 7AL204 electronic balance (sensitivity 0.0001 g, Mettler Toledo, Switzerland).

[0082] (2) Test plan

[0083] Smoking parameters: The 11 heated cigarette samples were equilibrated at a temperature of 22°C ± 1°C and a relative humidity of 60% ± 3% for 48 h, and the cigarettes were smoked according to the Canadian deep smoking mode, i.e., the puffing volume was 55.0 mL, the puffing time was 2 s, the puffing frequency was 30 s, and the puffing curve was bell-shaped.

[0084] Analysis of the puff-by-puff ACM (aerosol capture volume) of heated cigarette aerosol: randomly select balanced cigarette samples and smoke them in the RM20H rotary smoking machine using the same smoking utensils according to the above smoking parameters. Each puff of aerosol from every 16 cigarettes is captured on a 44mm Cambridge filter. After the puff is finished, the difference in the mass of the collector before and after the puff is calculated to obtain the aerosol puff-by-puff ACM value.

[0085] (3) Evaluation of the consistency of heated cigarettes before and after

[0086] The stability of heated cigarette aerosol should be based on ensuring the total aerosol release, taking into account the overall discreteness of the data and the consistency of the adjacent puff sequence data. Based on these two dimensions, the stability index of heated cigarettes is calculated according to the method introduced in the literature to evaluate the puff-by-puff stability. According to the literature, the relative standard deviation method (RSD) is selected to evaluate the overall discreteness of the puff-by-puff release data, and the relative mean moving range method (RMR) is selected to evaluate the consistency of the adjacent puff sequence release. Therefore, the puff-by-puff stability of heated cigarette aerosol can be expressed by a two-dimensional vector Indicates that Specifically expressed as: (RSD, RMR).

[0087] The better the overall discreteness of the puff-by-puff release data, that is, the smaller the RSD of the horizontal coordinate, the closer the vector is to the vertical coordinate axis; the smaller the difference in the release data of adjacent puffs, that is, the smaller the RMR of the vertical coordinate, the closer the vector is to the horizontal coordinate axis; when both RSD and RMR are very small, the vector is closer to the origin. Calculate the modulus of the above two-dimensional vector and define it as the stability index SI (Stability Index). The smaller the stability index value, the better the stability. The calculation formula is as follows:

[0088]

[0089] Among them, χ i is the aerosol ACM release amount under the i-th puff order, is the arithmetic mean of the aerosol ACM release per puff, and n is the total number of puffs.

[0090] The results are as follows:

[0091]

[0092] From the above data, it can be found that the heated cigarette provided by the present invention has the advantage of high puff-to-puff consistency; by comparing Examples 1-9 and Comparative Example 1, it can be found that the present invention can effectively control the internal temperature of the tobacco core material by using specific raw materials, balance the aerosol release of the heated cigarette in the front and rear stages of smoking, and improve the puff-to-puff consistency before and after smoking; by comparing Example 1 and Comparative Example 2, it can be found that the present invention adopts a specific structural setting, so that the aerosol generated by the first smoking unit will not condense too much in the second smoking unit, thereby ensuring the smoking consistency before and after smoking.

[0093] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the heated cigarette with high puff-by-puff consistency and its application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0094] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0095] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A heated cigarette with high puff-by-puff consistency, characterized in that: The heated cigarette comprises a first smoking unit, a second smoking unit, a cooling unit and a filter unit connected in sequence; The cigarette paper of the first smoking unit is coated with temperature control material on both sides.

2. The heated cigarette according to claim 1, characterized in that: The first smoking unit is prepared by a method comprising the following steps: The temperature control material is mixed with an adhesive and water to obtain a temperature control suspension, and then the temperature control suspension is coated on both sides of the cigarette paper. After drying, the cigarette paper is wrapped with the cigarette core material to obtain the first smoking unit.

3. The heated cigarette according to claim 2, characterized in that: The temperature control material comprises any one of alumina aerogel, silica aerogel, expanded vermiculite powder, expanded perlite powder or calcium silicate powder, or a combination of at least two thereof, preferably a combination of alumina aerogel and silica aerogel; Preferably, the mass ratio of the alumina aerogel to the silica aerogel is (3-4):(1-2).

4. The heated cigarette according to claim 2 or 3, characterized in that: The mass ratio of the temperature control material to the adhesive is (100-350):(2-5); Preferably, the coating area of ​​the temperature-controlled suspension on both sides of the cigarette paper is 50-100% of the surface area of ​​the cigarette paper.

5. The heated cigarette according to any one of claims 1 to 3, characterized in that: The second smoking unit is prepared by a method comprising the following steps: The heat conductive filler is mixed with an adhesive and water to obtain a heat conductive suspension, which is then coated on both sides of the cigarette paper. After drying, the cigarette paper is wrapped with a cigarette core material to obtain the second smoking unit; the cigarette core material is coated or soaked on both sides with the heat conductive suspension.

6. The heated cigarette according to claim 5, characterized in that: The thermally conductive filler comprises any one of boron nitride, graphene oxide, zinc oxide, aluminum nitride or carbon nanotubes or a combination of at least two thereof, preferably a combination of boron nitride and graphene oxide; Preferably, the mass ratio of boron nitride to graphene oxide is (3-4):(6-7).

7. The heated cigarette according to claim 5 or 6, characterized in that: The mass ratio of the thermal conductive filler to the adhesive is (50-250):(1-5); Preferably, the coating area of ​​the heat-conducting suspension on both sides of the cigarette paper is 80-100% of the surface area of ​​the cigarette paper; Preferably, the coating area or the wetting area of ​​the cigarette core material after double-sided coating or wetting with the heat-conductive suspension is independently 80-100% of the surface area of ​​the cigarette core material.

8. The heated cigarette according to any one of claims 2 to 7, characterized in that: The binder includes any one of guar gum, locust bean gum, carboxymethyl cellulose or sodium alginate, or a combination of at least two of them.

9. The heated cigarette according to any one of claims 1 to 8, characterized in that: The length ratio of the first smoking unit to the second smoking unit is (1-2):

1.

10. Use of the heated cigarette according to any one of claims 1 to 8 in the preparation of heated cigarettes.

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