Heat-not-burn tobacco products and methods for manufacturing the same

Abstract

The present invention provides a heat-not-burn tobacco product, comprising a first heating part having a front end, a second heating part having a mouth end, and a first thermal barrier located between the first heating part and the second heating part, which can block liquid while allowing vapor to pass through. The first heating part includes a liquid aerosol precursor, and the second heating part includes a solid tobacco substance. This heat-not-burn tobacco product has a simple structure, low processing cost, and can greatly reduce the generation of toxic chemicals. A manufacturing method of such a heat-not-burn tobacco product is also disclosed.

Description

Technical Field

[0001] The present invention relates to the field of tobacco products, and more particularly to a heat-not-burn tobacco product. Background Art

[0002] A heat-not-burn (HNB) tobacco product is a new type of tobacco product that heats tobacco shreds through a special heat source, and when heated, substances such as nicotine and flavors in the tobacco shreds volatilize to produce smoke to meet the needs of smokers. Under low-temperature conditions, the heat-not-burn tobacco product is usually heated at about 300°C. Compared with traditional cigarettes, the release of tar and harmful substances in the smoke is greatly reduced, so it has attracted more and more attention in the market and has become the mainstream direction of the development of the tobacco industry.

[0003] Currently, common heat-not-burn tobacco products generate aerosol by heating solid matrices such as tobacco flakes, tobacco beads or tobacco shreds derived from reconstituted tobacco flakes. These solid matrices include one or more aerosol precursors (such as glycerol and propylene glycol), water, flavoring agents, and other components (such as nicotine). However, this type of heat-not-burn tobacco product has the following disadvantages: (1) The processing process of processing liquid aerosol precursors and solid tobacco into solid matrices is complex and costly; (2) In order to fully evaporate the aerosol precursors in the matrix, the combined tobacco and aerosol precursors need to be subjected to a relatively high heating temperature (such as 225 - 350°C), resulting in the generation of tobacco-based compounds in the aerosol; (3) Since the aerosol precursors are chemically bonded to the solid matrix, more thermal energy is required to break these chemical bonds to evaporate the aerosol precursors, and the higher thermal energy will inevitably further increase the generation of toxic tobacco-based compounds.

[0004] Therefore, there is an urgent need for an improved heat-not-burn tobacco product to overcome the above defects. Summary of the Invention

[0005] An object of the present invention is to provide a heat-not-burn tobacco product with a simple structure, low processing cost, and capable of greatly reducing the generation of toxic chemical substances.

[0006] Another object of the present invention is to provide a method for manufacturing a heat-not-burn tobacco product with low processing cost, simple structure, and capable of greatly reducing the generation of toxic chemical substances.

[0007] To achieve the above object, the present invention provides a heat-not-burn tobacco product, including a first heating part with a front end, a second heating part with a mouth end, and a first heat barrier located between the first heating part and the second heating part that can block liquid while allowing steam to pass through, wherein the first heating part is filled with a liquid aerosol precursor, and the second heating part is filled with a solid tobacco substance.

[0008] Compared with the prior art, the heat-not-burn tobacco product of the present invention separates the liquid aerosol precursor and the solid cigarette to form two heating parts. The liquid aerosol precursor as the first heating part is located at the front end, and the solid cigarette material as the second heating part is located at the mouth end. A first heat barrier is provided between the first heating part and the second heating part. Therefore, when heated, the heating temperature of the solid cigarette material is not higher than that of the liquid aerosol precursor, thereby minimizing the formation of heat-induced toxic chemicals, such as TSNA (tobacco-specific nitrosamines) formed during traditional tobacco combustion or high-temperature heating. At the same time, the structure of separating the liquid aerosol precursor and the solid cigarette is simple and the processing cost is low, which is suitable for popularization and application.

[0009] In a preferred embodiment, the first heating part further includes a fibrous matrix, a porous fibrous foam, or a pleated and aggregated fibrous web, and the liquid aerosol precursor is carried by the fibrous matrix, or the porous polymer, or the porous fibrous foam, or the fibrous web.

[0010] Preferably, the liquid aerosol is carried by the fibrous web, and the fibrous web is made of at least one of cellulose fiber, non-cellulose fiber, metal, conductive carbon, graphite, and ceramic.

[0011] Preferably, the liquid aerosol precursor includes glycerol, and / or propylene glycol, water, nicotine.

[0012] Preferably, the liquid aerosol precursor includes an emulsifier to control the evaporation rate of the liquid aerosol precursor.

[0013] Preferably, the emulsifier includes at least one of microcrystalline cellulose, nanocrystalline cellulose, cellulose nanofibrils, and bacterial cellulose.

[0014] Preferably, the solid tobacco material includes solid tobacco, solid phytomedicine and / or flavor compounds, or a mixture of the above materials.

[0015] In a preferred embodiment, it further includes a cooling part connected to the mouth end of the second heating part and a filtering part connected to the cooling part.

[0016] Preferably, the cooling part includes a phase change material or a cooling material made of at least one of metal, ceramic, and polymer.

[0017] In another preferred embodiment, the heating temperature of the first heating part is not higher than 300 °C, and the heating temperature of the second heating part is not higher than 150 °C.

[0018] Preferably, the heating of the first heating part and the second heating part is achieved by resistance heating, induction heating, or solid-state microwave heating.

[0019] In an alternative embodiment, it further includes a carbon-based ignition heat source connected to the front end of the first heating part.

[0020] Preferably, a second thermal barrier is provided between the heat source and the first heating part.

[0021] Preferably, a third thermal barrier is connected to the outside of the heat source.

[0022] In another alternative embodiment, it further includes a first heater connected to the first heating part and a second heater connected to the second heating part.

[0023] Preferably, ventilation holes are provided on the first heater and / or the second heater.

[0024] Preferably, it further includes a control device electrically connected to the first heater and the second heater.

[0025] Preferably, it further includes a basic heater respectively connected to the control device and the first heater.

[0026] Preferably, the control device includes a PCB, a microcontroller, a power supply, an LED indicator, a charging interface, and a switch button.

[0027] Preferably, the first heating part and the second heating part are made of at least one of metal, carbon, ceramic, plastic, glass or a cellulose pressing plate of the above materials.

[0028] Preferably, it further includes a plurality of ventilation holes to adjust any components of the inhalable aerosol.

[0029] Preferably, the first heating part and the second heating part are externally coated with a heat insulation layer, and the heat insulation layer is externally coated with wrapping paper.

[0030] Correspondingly, the present invention also provides a manufacturing method of a heat-not-burn tobacco product, including:

[0031] Forming a first heating part with a front end, and a liquid aerosol precursor is contained in the first heating part;

[0032] Forming a second heating part with a mouth end, and a solid tobacco substance is contained in the second heating part; and

[0033] Forming a first thermal barrier located between the first heating part and the second heating part, which can block liquid while steam can pass through.

[0034] Optionally, the liquid aerosol precursor in the first heating part is carried by a fibrous matrix, a porous fibrous foam or a pleated and aggregated fibrous web.

[0035] Preferably, the method further includes: forming a cooling part at the mouth end of the second heating part; and forming a filtering part on the cooling part.

[0036] As an embodiment, the method further includes: forming a heat source for carbon-based ignition at the front end of the first heating part; and forming a second thermal barrier before the heat source and the first heating part, so that the heating temperature of the first heating part is not higher than 300 °C, and the heating temperature of the second heating part is not higher than 150 °C.

[0037] As another embodiment, the method further includes: forming a first heater connected to the first heating part; and forming a second heater connected to the second heating part, so that the heating temperature of the first heating part is not higher than 300 °C, and the heating temperature of the second heating part is not higher than 150 °C. Description of the Drawings

[0038] Figure 1 Schematic diagram of the first embodiment of the heat-not-burn tobacco product of the present invention.

[0039] Figure 2 Schematic diagram of the second embodiment of the heat-not-burn tobacco product of the present invention.

[0040] Figure 3 Schematic diagram of the third embodiment of the heat-not-burn tobacco product of the present invention.

[0041] Figure 4 Schematic diagram of the fourth embodiment of the heat-not-burn tobacco product of the present invention.

[0042] Figure 5 Schematic diagram of the fifth embodiment of the heat-not-burn tobacco product of the present invention. Detailed Embodiments

[0043] Several different preferred embodiments of the present invention will be described below with reference to the drawings, where the same reference numerals in different drawings represent the same components. The essence of the present invention is to provide a heat-not-burn tobacco product with a separated liquid aerosol precursor and solid tobacco material, so as to reduce the processing cost and reduce the generation of harmful substances.

[0044] The present disclosure will now be described more fully hereinafter with reference to example implementations of the present disclosure. These example embodiments are described so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In fact, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will satisfy applicable legal requirements. As used in the specification and the appended claims, the singular forms "a", "an", "the", etc. include plural referents unless the context clearly dictates otherwise.

[0045] In some embodiments of the present invention, electrical energy can be used to heat certain materials to produce inhalable substances; in other embodiments of the present invention, the heating of the materials can be achieved by using a carbon-based ignition source. In both of these heating methods, the materials can be heated without combustion.

[0046] The inhalable substances produced by heating the materials can be in the form of vapor (i.e., a substance in the gas phase at a temperature below its critical point), can be an aerosol (i.e., a suspension of fine solid particles) or droplets in a gas. The aerosol used herein is intended to include vapor, gas, and visible or invisible aerosols.

[0047] Figure 1 Schematic diagram of the first embodiment of the non-combustible heated tobacco product of the present invention. As shown, the non-combustible heated tobacco product 10A includes a first heating portion 110 having a front end 100a, a second heating portion 120 having a mouth end 100b, and a first thermal barrier 130 located between the first heating portion 110 and the second heating portion 120. The first heating portion 110 includes a liquid aerosol precursor 110a, the second heating portion 120 includes a solid tobacco substance 120a, and the first thermal barrier 130 blocks liquids while allowing vapor to pass through. In this embodiment, the portion constituted by the first heating portion 110, the second heating portion 120, and the first thermal barrier 130 is referred to as the "tobacco core".

[0048] Specifically, the first heating part 110 and the second heating part 120 are laminate plates or solid-state tubes, such as containers or cavities made of at least one of metal, carbon, ceramic, plastic, and glass. An insulating layer 141 is coated outside the first heating part 110 and the second heating part 120, and wrapping paper 142 is coated outside the insulating layer 141 to simulate the appearance of a traditional burn-out cigarette. The front end 100a provided by the first heating part 110 is a closed end and can be made of a liquid-impermeable but breathable material. The first heat barrier 130 located between the first heating part 110 and the second heating part 120 can be made of glass, polymer, metal, carbon, ceramic, or a combination thereof, and it can be non-thermally conductive or partially thermally conductive. After the first heating part 110 and the second heating part 120 are heated, the aerosol generated by the first heating part 110 passes through the second heating part 120 and is mixed with the aerosol generated by the heated solid tobacco material 120a for consumers to inhale at the mouth end 100b. It should be noted that the aerosol channel extends from the first heating part 110 through the second heating part 120 to the mouth end 100b.

[0049] More specifically, the first heating part 110 contains a liquid aerosol precursor 110a, which can include a liquid or liquid mixture of glycerin, propylene glycol, water, and nicotine. Preferably, an emulsifier can also be included to control the evaporation rate of the liquid aerosol precursor, and the emulsifier can include at least one of microcrystalline cellulose, nanocrystalline cellulose, cellulose nanofibrils, and bacterial cellulose. The second heating part 120 contains a solid tobacco material 120a, commonly, such as tobacco, herbal medicine, or tobacco or herbal medicine loaded with other flavor compounds. The solid tobacco material can exist in the form of strands, pellets, chopped blocks, beads, aggregated fibrids, or cast sheets.

[0050] Optionally, in one embodiment, the liquid aerosol precursor 110a exists in the form of a free liquid aerosol precursor, that is, only the free liquid aerosol precursor 110a is contained within the first heating part 110, and the first heating part 110 can be a leak-proof metal cylinder, one end of which is sealed and the other end is made to be liquid-impermeable but vapor-permeable.

[0051] In another embodiment, the liquid aerosol precursor 110a is carried by a fibrous matrix, for example, the liquid aerosol precursor 110a is loaded into a pre-formed porous fibrous matrix, such as a non-woven fabric. The weight of this non-woven fabric is about 40 grams per square meter and can accommodate 200 - 600% of the liquid weight. Preferably, in this embodiment, the aerosol precursor can be accommodated in multiples of 1000% or more of the weight of the fabric. Preferably, this fabric can be metallized with metal fibers, metal coatings, or a mixture thereof to assist in heat transfer within the fibrous matrix. In other embodiments, the non-woven fabric can contain carbon fibers for heat conduction without including metal.

[0052] In yet another embodiment, the liquid aerosol precursor 110a is carried by a porous fibrous foam. For example, the fibrous foam can be made of polymers, metals, fibers (such as macro, micro or nano cellulose, carbon or other synthetic or natural fiber-based foams). These foam matrices have sufficient porosity and are capable of holding a large volume of liquid. When thermally conductive carbon is not used in the foam, the foam can be metallized to aid in heat conduction.

[0053] In yet another embodiment, the liquid aerosol precursor 110a is carried by a pleated and aggregated fibrous web made of at least one of cellulose fibers, non-cellulose fibers, metals, conductive carbon, graphite, ceramics. Since hollow channels are formed during the pleating and aggregation process, such a sheet can be processed to have a high porosity to accommodate a high liquid volume. Optionally, the aerosol precursor or precursor mixture can be loaded during the formation of the aggregated sheet or after the formation of the sheet and / or the cylindrical structure.

[0054] It should be noted that in the above embodiments, the shape of these matrices loaded with the liquid aerosol precursor 110a is preferably cylindrical, but is not limited thereto.

[0055] Figure 2 A second embodiment of the heat-not-burn tobacco product 10B is shown. As shown, the heat-not-burn tobacco product 10B is substantially the same as the first embodiment, except that it further includes a cooling portion 150 connected to the second heating portion 120 and a filtering portion 160 connected to the cooling portion 150 to form a mouth end 100b. Specifically, the cooling portion 150 includes a phase change material or a cooling material made of at least one of metals, ceramics, polymers. The filtering portion 160 can be made of cellulose acetate, polypropylene, polylactic acid, or cellulose in the form of fibers or films, and the filtering portion 160 can also be a paper filtering portion. Specifically, the cooling portion 150 and the filtering portion 160 have a sufficient number of pores to allow the aerosol to pass through. In addition, the outer sides of the cooling portion 150 and the filtering portion 160 are coated with a forming paper 151 and an outer wrapping paper 142, that is, the outer wrapping paper 142 extends in the length direction of the cigarette to make its appearance similar to that of a traditional combustible cigarette.

[0056] In the present invention, the first heating portion 110 and the second heating portion 120 are controlled at different temperatures to minimize the formation of heat-induced toxic chemicals, such as TSNA (tobacco-specific nitrosamines) formed when tobacco is heated above 150 °C. Specifically, the heating temperature of the first heating portion 110 is not higher than 300 °C, and the heating temperature of the second heating portion 120 is not higher than 150 °C, and this heating can be achieved by ignition type or electric heating type.

[0057] Figure 3Shows the structure of a heat-not-burn tobacco product 10C using ignition heating. As shown in the figure, a heat source 171 and a second heat barrier 172 provided between the first heating part 110 and the heat source 171 are connected to the front end 100a of the first heating part 110. Specifically, the heat source 171 is a carbon-based ignition heat source, which can be ignited by a lighter, and the temperature of the first heating part 110 during ignition may reach 900 °C. In order to reach 300 °C required by the present invention, the second heat barrier 172 is used to reduce the temperature of the liquid aerosol precursor in the first heating part 110 to about 300 °C. Preferably, the second heat barrier 172 is made of a liquid-impermeable but gas-permeable (or partially gas-permeable) material made of one or more of glass, metal, ceramic, carbon, and polymer. However, the second heat barrier 172 may be omitted in other embodiments. At the same time, a third heat barrier 173 can be connected outside the carbon-based ignition source 171 to prevent the temperature from being too high. Preferably, the second heating part 120 controls its temperature below 150 °C, for example, between 100 - 150 °C, by one or more materials such as pores, cooling materials, fiber meshes, metals, carbons, ceramics, and polymers provided thereon.

[0058] In some embodiments, the heat-not-burn tobacco product 10C may be provided with a plurality of ventilation holes (not shown in the figure) to adjust any components in the inhaled aerosol. For example, the ventilation holes are provided between the first heating part 110 and the second heating part 120, between the cooling part 150 and the filter 160, or on the cooling part 150 and the filter 160, or on the second heat barrier 172.

[0059] Figure 4 Shows the structure of another heat-not-burn tobacco product 10D using electric heating. Specifically, the heat-not-burn tobacco product 10D further includes a first heater 181 connected to the first heating part 110 and a second heater 182 connected to the second heating part 120, that is, the first heating part 110 and the second heating part 120 are independently heated to control the temperature of the first heating part 110 not higher than 300 °C and the temperature of the second heating part 120 not higher than 150 °C. Specifically, the first heater 181 is disposed around the outer periphery of the first heating part 110, the second heater 182 is disposed around the outer periphery of the second heating part 120, and the first heater 181 and the second heater 182 are separated by a heat-insulating material 183.

[0060] A control device 190 is electrically connected to the front end 100a of the tobacco core to control the heating of the first heating part 110 and the second heating part 120. Optionally, the heating of the first heating part 110 and the second heating part 120 in the control device 190 can be achieved by resistive heating, induction heating or solid-state microwave heating. Specifically, the control device 190 includes a connected power supply (not shown in the figure), a PCB (not shown in the figure), a microcontroller (not shown in the figure), an LED indicator 191, a battery charging interface 192, and a switch button 193.

[0061] Specifically, the power supply provides energy for the entire heat-not-burn tobacco product. The power supply can be implemented in various ways. Preferably, the power supply is small in size and light in weight to be adapted to the control device 190, thus facilitating handheld use, but can provide sufficient power to quickly heat the first heating part 110 and the second heating part 120 in a short time. Optionally, the power supply is a replaceable battery or a rechargeable battery. For example, a solid-state battery, a thin-film solid-state battery, a lithium-ion battery (such as a rechargeable lithium-manganese dioxide battery), a lithium polymer battery, a nickel-cadmium battery, or a rechargeable supercapacitor, etc. Preferably, in the case of using a rechargeable battery, it can be connected to a wall charger, a car charger or a computer through the charging interface 192 via a connector or a USB connector (such as USB 2.0, 3.0, 3.1, USB Type-C). Or connected to a photovoltaic cell (solar cell), a solar panel, a wireless charger or a wireless radio frequency (RF)-based charger. Or wirelessly charged in various ways and wirelessly communicate with handheld devices (such as mobile phones, laptops and tablets) to transmit and check the device status or remotely control the device functions or regularly upgrade the software unit in the control.

[0062] In other embodiments, the power supply can include a capacitor. The capacitor discharges faster than the battery and can be charged when the tobacco product is heated, thus allowing the battery to discharge into the capacitor at a lower rate than the rate used to directly power the tobacco product. The capacitor can be a supercapacitor, such as an electric double-layer capacitor, which can be used alone or in combination with the battery. When used alone, it can be charged before each use of the device. Therefore, the tobacco product can also include a charger assembly, and the charger assembly can be attached to the heater before use to replenish the supercapacitor.

[0063] In other embodiments, the first and second heaters 181, 182 may be conductive heaters and / or inductive heaters and / or solid-state microwave heaters. For example, a conductive heater includes a resistive heating element configured to generate heat when an electric current passes through it. It may employ a lightweight, low-density, medium-resistivity conductive material that is rapidly heated when energized to provide effective energy. These heating elements can precisely control the temperature based on time-current. Exemplarily, these elements include, but are not limited to, non-metallic materials such as carbon, graphite, carbon-graphite composites, non-metallic carbides, nitrides, oxides, silicides, etc., or ceramics. Refractory materials may also be used. Different materials above may also be mixed to obtain the desired resistivity or thermal conductivity.

[0064] An LED indicator 191 is used to indicate the status of the first and second heaters 181, 182 relative to the battery power or the heating temperature. For example, a green light indicates that the heater has reached its preset temperature, a yellow light indicates that the heater is still heating, and a red light indicates that the battery needs to be charged. Of course, the form of the indicator is not limited to this, and the indicator can also be used for decoration or lighting.

[0065] A switch button 193 is used to start the device to perform the desired heating function, enabling the heater to execute and automatically terminate after completion. Preferably, the button 193 protrudes from the housing of the tobacco product 10D or the control device 190 for easy operation. After reaching the predetermined temperature, the first and second heaters 181, 182 automatically stop without the need to operate the button 193.

[0066] In this embodiment, as Figure 4 shown, the control device 190 is connected to the first heater 181 through a base heater 194. Specifically, the base heater 194 can be electrically connected to the control device 190 through a fixing device 198. In other embodiments, the base heater 194 can be omitted.

[0067] In some embodiments, the heat-not-burn tobacco product 10C may be provided with a plurality of ventilation holes (not shown in the figure) to adjust or dilute any components in the generated inhalable aerosol. For example, the ventilation holes are provided between the first heating portion 110 and the second heating portion 120, between the cooling portion 150 and the filter 160, or on the cooling portion 150 and the filter 160, or on the second heat barrier 172.

[0068] In Figure 4 the shown embodiment, the cooling portion 150 and the filtering portion 160 are provided in the tobacco core, that is, the tobacco core in the second embodiment described above is adopted. Figure 2 is used.

[0069] Preferably, in another embodiment, as Figure 5As shown, the cooling part 150 and the filtering part 160 are arranged outside the tobacco core and are connected to the outer shell of the heat-not-burn tobacco product 10E to form a detachable filter assembly 101. An outer cover 102 is provided to open or close the filter assembly 101, making the use of the tobacco product 10E more hygienic and convenient.

[0070] In the present invention, the shape of the outer shell of the heat-not-burn tobacco product is variable. In some embodiments, the outer shell is generally in the shape of a slender cylindrical rod or tube. The outer shell can be an integral structure that is not detachable, or includes two or more main body parts that can be detachably separated. For example, the filter assembly, the tobacco core, and the control device 190 are three separable components. Preferably, the shape of the outer shell is consistent with the shapes of the filter assembly and the tobacco core, such as the first and second heating parts 110 and 120. The outer shape of the tobacco product is not limited herein.

[0071] In summary, the heat-not-burn tobacco product of the present invention separates the liquid aerosol precursor and the solid cigarette to form two heating parts. The liquid aerosol precursor as the first heating part is located at the front end, and the solid cigarette material as the second heating part is located at the mouth end. A first thermal barrier is provided between the first heating part and the second heating part. Therefore, when heating, the heating temperature of the solid cigarette material is lower than that of the liquid aerosol precursor, thereby minimizing the formation of heat-induced toxic chemicals, such as TSNA (tobacco-specific nitrosamines) formed during traditional tobacco combustion or high-temperature heating. At the same time, the structure of separating the liquid aerosol precursor and the solid cigarette is simple and the processing cost is low, which is suitable for popularization and application.

[0072] In addition, the present invention also provides a manufacturing method of a heat-not-burn tobacco product, including the following steps:

[0073] Forming a first heating part with a front end, and the first heating part is filled with a liquid aerosol precursor;

[0074] Forming a second heating part with a mouth end, and the second heating part is filled with solid tobacco material; and

[0075] Forming a first thermal barrier that can block liquid while allowing steam to pass between the first heating part and the second heating part.

[0076] Optionally, the liquid aerosol precursor in the first heating part is carried by a fibrous matrix, a porous fibrous foam, or a pleated and aggregated fibrous web.

[0077] Preferably, the method further includes: forming a cooling part at the mouth end of the second heating part; and forming a filtering part on the cooling part.

[0078] As an embodiment, the method further includes: forming a heat source for carbon-based ignition at the front end of the first heating part; and forming a second thermal barrier before the heat source and the first heating part, so that the heating temperature of the first heating part is not higher than 300 °C and the heating temperature of the second heating part is not higher than 150 °C.

[0079] As another embodiment, the method further includes: forming a first heater connected to the first heating part; and forming a second heater connected to the second heating part, so that the heating temperature of the first heating part is not higher than 300 °C and the heating temperature of the second heating part is not higher than 150 °C.

[0080] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A heat-not-burn tobacco product, comprising a first heating part with a front end, a second heating part with a mouth end, and a first thermal barrier located between the first heating part and the second heating part, which can block liquid while allowing steam to pass through. Characterized in that: The front end of the first heating part is a closed end made of a liquid-impermeable and breathable material. The first heating part contains a liquid aerosol precursor, and the second heating part contains a solid tobacco material. The heating temperature of the first heating part is not higher than 300 °C, and the heating temperature of the second heating part is not higher than 150 °C. After the first heating part and the second heating part are heated, the aerosol generated by the liquid aerosol precursor of the first heating part passes through the second heating part and is mixed with the aerosol generated by the heated solid tobacco material and supplied to the mouth end.

2. The heat-not-burn tobacco product according to claim 1, Characterized in that: The first heating part further includes a fibrous matrix, a porous fibrous foam, or a pleated and aggregated fibrous web, and the liquid aerosol precursor is carried by the fibrous matrix, or the porous fibrous foam, or the fibrous web.

3. The heat-not-burn tobacco product according to claim 2, Characterized in that: The liquid aerosol is carried by the fibrous web, and the fibrous web is made of at least one of cellulose fiber, non-cellulose fiber, metal, conductive carbon, graphite, and ceramic.

4. The heat-not-burn tobacco product according to claim 1, Characterized in that: The liquid aerosol precursor includes glycerol, and / or propylene glycol, water, nicotine.

5. The heat-not-burn tobacco product according to claim 4, Characterized in that: The liquid aerosol precursor includes an emulsifier to control the evaporation rate of the liquid aerosol precursor.

6. The heat-not-burn tobacco product according to claim 5, Characterized in that: The emulsifier includes at least one of microcrystalline cellulose, nanocrystalline cellulose, cellulose nanofibrils, and bacterial cellulose.

7. The heat-not-burn tobacco product according to claim 1, Characterized in that: The solid tobacco material includes solid tobacco, solid phytomedicine, and / or flavor compounds, or a mixture of the above materials.

8. The heat-not-burn tobacco product according to claim 1, Characterized in that: It further includes a cooling part connected to the mouth end of the second heating part and a filtering part connected to the cooling part.

9. The heat-not-burn tobacco product according to claim 8, Characterized in that: The cooling part includes a phase change material or a cooling material made of at least one of metal, ceramic, and polymer.

10. The heat-not-burn tobacco product according to claim 1, Characterized in that: The heating of the first heating part and the second heating part is achieved by resistive heating, inductive heating, or solid-state microwave heating.

11. The heat-not-burn tobacco product according to claim 1, Characterized in that: It further includes a carbon-based ignition heat source connected to the front end of the first heating part.

12. The heat-not-burn tobacco product according to claim 11, Characterized in that: A second thermal barrier is provided between the heat source and the first heating part.

13. The heat-not-burn tobacco product according to claim 11, characterized in that: a third thermal barrier is connected to the outside of the heat source.

14. The heat-not-burn tobacco product according to claim 1, characterized in that: it further includes a first heater connected to the first heating part and a second heater connected to the second heating part.

15. The heat-not-burn tobacco product according to claim 14, characterized in that: it further includes a control device electrically connected to the first heater and the second heater.

16. The heat-not-burn tobacco product according to claim 15, characterized in that: it further includes a basic heater respectively connected to the control device and the first heater.

17. The heat-not-burn tobacco product according to claim 15, characterized in that: the control device includes a PCB, a microcontroller, a power supply, an LED indicator, a charging interface, and a switch button.

18. The heat-not-burn tobacco product according to claim 1, characterized in that: the first heating part and the second heating part are made of at least one of metal, carbon, ceramic, plastic, glass or a cellulose pressing plate of the above materials.

19. The heat-not-burn tobacco product according to claim 1, characterized in that: it further includes a plurality of ventilation holes to adjust any component of the inhaled aerosol.

20. The heat-not-burn tobacco product according to claim 1, characterized in that: the first heating part and the second heating part are externally coated with a heat insulation layer, and the heat insulation layer is externally coated with a wrapping paper.

21. A manufacturing method of a heat-not-burn tobacco product, characterized by including: forming a first heating part with a front end, the first heating part being filled with a liquid aerosol precursor, and the front end of the first heating part being a closed end made of a liquid-impermeable and air-permeable material; forming a second heating part with a mouth end, the second heating part being filled with a solid tobacco substance; and forming a first thermal barrier located between the first heating part and the second heating part that can block liquid while allowing steam to pass through; the heating temperature of the first heating part is not higher than 300 °C, and the heating temperature of the second heating part is not higher than 150 °C; after the first heating part and the second heating part are heated, the aerosol generated by the liquid aerosol precursor of the first heating part passes through the second heating part and is mixed with the aerosol generated by the heated solid tobacco substance and supplied to the mouth end.

22. The manufacturing method of a heat-not-burn tobacco product according to claim 21, characterized in that, it further includes: the liquid aerosol precursor in the first heating part is carried by a fiber matrix, a porous fiber foam or a pleated and aggregated fiber web.

23. The manufacturing method of a heat-not-burn tobacco product according to claim 21, characterized in that, it further includes: forming a cooling part at the mouth end of the second heating part; and forming a filtering part on the cooling part.

24. The manufacturing method of a heat-not-burn tobacco product according to claim 21, characterized in that, it further includes: forming a carbon-based ignition heat source at the front end of the first heating part; and A second thermal barrier is formed before the heat source and the first heating portion.

25. The method for manufacturing a heated tobacco product according to claim 22, wherein, further comprising: forming a first heater connected to the first heating portion; and forming a second heater connected to the second heating portion.

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