Manufacturing method and manufacturing system of aerosol generating substrate

Abstract

The invention relates to the technical field of aerosol generating matrixes, and provides a manufacturing method and a manufacturing system of an aerosol generating matrix, the manufacturing method comprises the following steps: a mixed material is extruded at normal temperature to form an extruded matrix, and the mixed material is a component of the aerosol generating matrix; the extruded matrix is freeze-dried. The mixed material is extruded at normal temperature, the mixed material has good fluidity, the surface smoothness of an extruded matrix is good, and the extrusion molding effect is good, so that good extrusion efficiency and high production speed are guaranteed, and the yield is increased. By adopting freeze drying, endogenous substances in the extrusion matrix can be reserved, the form of the extrusion matrix can be kept, and the loss of effective substances such as plant alkaloid, a smoke agent and / or aroma components in the extrusion matrix can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generating substrates, and in particular to a method and system for manufacturing an aerosol generating substrate. Background Art

[0002] Aerosol generating substrates include aerosol generating substrates that form aerosols by ignition and aerosol generating substrates that form aerosols by heating without burning. Among them, in a typical aerosol generating substrate that is heated without burning, the aerosol generating substrate is heated by an external heat source so that the aerosol generating substrate is just heated to a degree sufficient to emit an aerosol, and the aerosol generating substrate does not burn. By loading the smoke generating agent raw material, the smoke generating agent raw material is released by heating the aerosol generating substrate during use to form an aerosol. In the related art, the manufacturing method of the aerosol generating substrate is prone to cause the loss of effective substances in the process of manufacturing the aerosol generating substrate, which affects the quality of the manufactured aerosol generating substrate. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a method and system for manufacturing an aerosol generating substrate, which can reduce the loss of effective substances in the process of manufacturing the aerosol generating substrate.

[0004] To achieve the above-mentioned purpose, the present application provides a method for manufacturing an aerosol generating substrate, comprising:

[0005] The mixed material is extruded at room temperature to form an extruded matrix, wherein the mixed material is a component of the aerosol generating matrix;

[0006] The extruded matrix was freeze-dried.

[0007] In some embodiments, after the mixed material is extruded at room temperature to form an extruded matrix, the manufacturing method includes:

[0008] The extruded matrix is ​​slit to a set length.

[0009] In some embodiments, the manufacturing method includes:

[0010] After the mixed material is extruded at room temperature to form an extruded matrix, the extruded matrix is ​​pre-cut to a preset length;

[0011] After freeze-drying the extruded matrix of a predetermined length, the extruded matrix is ​​cut into the predetermined length.

[0012] In some embodiments, before freeze-drying the extruded matrix, the manufacturing method comprises:

[0013] The extruded matrix is ​​subjected to a cooling and hardening process.

[0014] In some embodiments, the extrusion temperature of the room temperature extrusion is between 35° C. and 70° C.; and / or,

[0015] The extrusion pressure of the room temperature extrusion is between 0.5 bar and 300 bar.

[0016] In some embodiments, the extrusion pressure of the room temperature extrusion is between 20 bar and 80 bar.

[0017] In some embodiments, the extruded matrix is ​​extruded in a horizontal direction; or,

[0018] The extruded matrix is ​​extruded in a vertical direction relative to a horizontal direction.

[0019] In some embodiments, the freeze-drying comprises a freezing stage and a sublimation stage after the freezing stage, wherein the moisture in the extruded matrix is ​​frozen into ice crystals in the freezing stage, and the ice crystals in the extruded matrix are sublimated in the sublimation stage, wherein the temperature of the extruded matrix in the sublimation stage is higher than the temperature of the extruded matrix in the freezing stage.

[0020] In some embodiments, the temperature of the extruded matrix during the freezing stage is between -100°C and -30°C.

[0021] In some embodiments, the temperature of the extruded matrix during the sublimation stage is greater than -100°C and less than -30°C.

[0022] In some embodiments, the absolute vacuum degree of the ambient pressure in the sublimation stage is 1 Pa to 40 Pa; and / or the ambient temperature in the sublimation stage is 10° C. to 60° C. higher than the temperature of the extruded matrix.

[0023] In some embodiments, after the sublimation stage, the freeze drying comprises an aeration stage in which bound water in the extruded matrix evaporates.

[0024] In some embodiments, the absolute vacuum degree of the ambient pressure during the desorption stage is 1 Pa to 40 Pa; and / or the temperature of the extruded matrix during the desorption stage is 0° C. to 50° C.

[0025] In some embodiments, the ambient temperature during the desorption stage is 0° C. to 5° C. higher than the temperature of the extruded matrix.

[0026] In some embodiments, prior to the freezing stage, the freeze drying comprises a pre-freezing stage, during which the temperature of the extruded matrix is ​​reduced so that the temperature of the extruded matrix reaches -30°C to 0°C.

[0027] In some embodiments, the freeze-drying environment temperature is -70°C to 50°C.

[0028] In some embodiments, the moisture content of the extruded matrix after drying is 3% to 20%.

[0029] In some embodiments, the mixture includes, based on 100 parts by weight, 30 to 90 parts of plant raw materials, 1 to 15 parts of auxiliary raw materials, 5 to 30 parts of smoke-generating agent raw materials, 1 to 10 parts of adhesive raw materials, and 1 to 15 parts of flavor raw materials.

[0030] The present application also provides a manufacturing system for an aerosol generating substrate, the manufacturing system comprising:

[0031] An extrusion device, wherein the extrusion device is used to extrude the mixed material at room temperature to form an extrusion matrix;

[0032] A freeze drying device is provided, wherein the freeze drying device is used to freeze dry the extruded matrix.

[0033] In some embodiments, the extrusion device comprises a bottom die and a mouth die, and the mixed material is extruded from the mouth die to form the extruded matrix;

[0034] One mouth mold is arranged on a single bottom mold; or a plurality of mouth molds are arranged on a single bottom mold.

[0035] In some embodiments, the number of the bottom dies is plural, the extrusion device includes an adapter, and the multiple bottom dies are disposed on the adapter.

[0036] In some embodiments, the freeze-drying equipment includes a box, a vacuum pump, a refrigeration system, a partition and a material tray. At least one partition is provided in the box, and the material tray is placed on the partition. The material tray is used to hold the extruded matrix. The vacuum pump is used to control the vacuum degree in the box, and the refrigeration system adjusts the temperature of the partition to provide heat for drying the extruded matrix.

[0037] The manufacturing method provided in the embodiment of the present application is to extrude the mixed material at room temperature, the mixed material has good fluidity, the surface smoothness of the extruded matrix is ​​good, and the extrusion molding effect is good, thereby ensuring good extrusion efficiency and faster production speed, and improving the yield rate. The use of freeze drying is conducive to retaining the endogenous substances in the extruded matrix, maintaining the morphology of the extruded matrix, and reducing the loss of effective substances such as alkaloids, smoke-generating agents and / or aroma components in the extruded matrix. During the freeze drying process, the water in the extruded matrix first freezes to form ice crystals. When the ice crystals sublimate and escape, micropores will be formed in the extruded matrix, and the volume of ice is greater than the volume of the same mass of water. Therefore, freeze drying is conducive to the formation of a microporous structure in the extruded matrix and improves the porosity of the extruded matrix. The aerosol-generating matrix obtained by extrusion and freeze drying at room temperature is an integrated molding structure. In this way, the aerosol-generating matrix is ​​an integrated medium during use, such as being heated and sucked or stopped being heated, and is not prone to the problem of disintegration and falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flowchart of a method for manufacturing an aerosol generating substrate according to an embodiment of the present application;

[0039] Figure 2 Schematic diagram of the structure of a manufacturing system of an aerosol generating medium according to an embodiment of the present application, wherein the extruded matrix is ​​extruded in a horizontal direction;

[0040] Figure 3 for Figure 2 A schematic cross-sectional view of the structure shown;

[0041] Figure 4 is a schematic structural diagram of a manufacturing system according to another embodiment of the present application, wherein the extruded matrix is ​​extruded along a vertical direction;

[0042] Figure 5 This is a schematic structural diagram of a die according to an embodiment of the present application;

[0043] Figure 6 for Figure 5 A schematic diagram of the structure of the die and the extruded matrix shown;

[0044] Figure 7 This is a schematic structural diagram of a mouth mold and a bottom mold according to an embodiment of the present application;

[0045] Figure 8 This is a schematic structural diagram of a mouth mold, a bottom mold and an adapter according to an embodiment of the present application;

[0046] Fig. 9 This is a schematic structural diagram of a freeze-drying device according to an embodiment of the present application;

[0047] Fig.10 A schematic diagram of a freeze-drying curve according to an embodiment of the present application;

[0048] Fig.11 A schematic diagram of the structure of a hardening device according to an embodiment of the present application;

[0049] Fig.12 for Fig.11 A schematic cross-sectional view of the hardening device shown;

[0050] Fig.13 A schematic structural diagram of a hardening device according to another embodiment of the present application;

[0051] Fig.14 A perspective view of a first aerosol generating substrate according to an embodiment of the present application;

[0052] Fig.15 This is a perspective view of a second aerosol-generating substrate according to an embodiment of the present application.

[0053] Description of Reference Numerals

[0054] Extrusion matrix 10; air channel 10a; extrusion equipment 1; bottom die 11; mouth die 12; adapter 13; extrusion barrel 14; discharge port 14a; feeding port 14b; solid material feeding port 14b1; liquid material feeding port 14b2; extrusion screw 15; feeding screw 16; freeze-drying equipment 2; box body 21; vacuum pump 22; partition 23; tray 24; slitting equipment 3; hardening equipment 4; shell 41; cold chamber 41a; filling port 41b; conveyor belt 42; guide groove 42a; refrigerant channel 41b; outer shell 411; inner shell 412; packaging equipment 5; conveying equipment 6; solid material 100. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0056] In this application, the temperature unit "°C" is Celsius. The pressure unit "bar" is bar. The unit "μm" is micrometer.

[0057] The aerosol generating substrate is used to generate aerosol by heating. Exemplarily, the aerosol generating substrate can also be used to generate aerosol by heating without burning. That is, the aerosol generating substrate is heated below the ignition point to generate aerosol. The aerosol generating substrate does not burn during the process of generating aerosol. In some application scenarios, the aerosol generating substrate can be used to generate aerosol by ignition. The aerosol generating substrate of the present application is more used to generate aerosol by heating without burning.

[0058] The aerosol generating substrate provided in the embodiment of the present application is used for an aerosol generating product. The aerosol generating product includes an aerosol generating substrate and a functional segment. The functional segment is arranged at one end of the aerosol generating substrate in the longitudinal direction, and the functional segment includes a filter segment for filtering aerosol. The filter segment is used to filter the aerosol generated by the aerosol generating substrate.

[0059] The aerosol generating article is used for users to inhale the aerosol generated by the aerosol generating matrix. For example, the user can inhale the filtered aerosol by holding the filter section in the mouth. The aerosol generated by the aerosol generating matrix is ​​transported to the filter section under the action of the suction negative pressure.

[0060] The aerosol generating article is used in conjunction with an aerosol generating device having a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate to generate an aerosol.

[0061] There are many heating methods for the heating component. Exemplarily, the heating methods include center heating, circumferential heating and / or bottom heating. The center heating method refers to the heating component being inserted into the interior of the aerosol generating product to bake and heat the aerosol generating product from the inside to the outside. Exemplarily, the heating component can be inserted into the interior of the aerosol generating matrix for heating. The circumferential heating method refers to the heating component being arranged at the periphery of the aerosol generating product to bake and heat the aerosol generating product from the outside to the inside. Exemplarily, the heating component can be arranged at the periphery of the aerosol generating matrix for heating. The bottom heating method refers to the heating component being located at the bottom of the aerosol generating product. For example, in one embodiment, a heating component (resistance or electromagnetic) is used to heat the air first, and then the hot air bakes and heats the aerosol generating product from the bottom to the top (i.e., heat is transferred in the form of thermal convection). Bottom heating can also be achieved by transferring heat to the product in the form of heat conduction through a heating component such as a resistor or an electromagnetic.

[0062] It should be noted that the bottom of the aerosol generating article is the end thereof that is away from the functional section in the longitudinal direction.

[0063] The heating method of the heating component includes, but is not limited to, resistance heating, electromagnetic heating, infrared heating, microwave heating or laser heating. Among them, resistance heating and electromagnetic heating mainly transfer heat to the substrate in the form of heat conduction. Infrared heating, microwave heating or laser heating mainly transfer heat to the substrate in the form of thermal radiation. That is, the heating component can heat the substrate in one or more of the three forms of conduction, convection and radiation.

[0064] In some embodiments, the functional segment may only be provided with a filtering segment.

[0065] In some other embodiments, the functional section further includes a cooling section, which is located between the filtering section and the aerosol generating matrix, and is used to cool the aerosol before the filtering section filters the aerosol. The cooling section can improve the "hot mouth" phenomenon when the user inhales the aerosol.

[0066] The cooling materials used in the cooling section include but are not limited to one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, acrylic fiber and the like.

[0067] The filter materials used in the filter section include but are not limited to one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, acrylic fiber and the like.

[0068] The materials of the cooling section and the filtering section can be the same or different.

[0069] See also Figure 1 The present application embodiment provides a method for manufacturing an aerosol generating substrate, the manufacturing method comprising:

[0070] S100: the mixed material is extruded at room temperature to form an extruded matrix, wherein the mixed material is a component of the aerosol generating matrix;

[0071] The extruded substrate 10 has the same cross-sectional shape as the aerosol-generating substrate. That is, the cross-sectional shape of the extruded substrate 10 is the same as the cross-sectional shape of the aerosol-generating substrate. The mixed material is structured and shaped using an extrusion process without changing the chemical properties of the mixed material.

[0072] It should be noted that the longitudinal direction refers to the extension direction of the aerosol generating matrix. For example, if the aerosol generating matrix is ​​formed by extrusion, the longitudinal direction is the extension direction of the extruded matrix 10. The cross-sectional shape refers to the shape of the extruded matrix 10 with a plane perpendicular to the longitudinal direction as the cross section.

[0073] See also Figures 2 to 4The mixed material is extruded at room temperature by an extrusion device 1 to form an extruded matrix 10. Extrusion molding refers to a processing method in which the mixed material is plasticized by heat and pushed toward a discharge port 14a by the extrusion screw 15 through a die 12 to form an extruded matrix 10 with a preset cross-sectional shape.

[0074] During the extrusion process, the temperature will affect the fluidity of the mixture and the smoothness of the outer surface of the extruded matrix 10. Normal temperature extrusion can take into account both the fluidity of the mixture during the extrusion process and the smoothness of the outer surface of the extruded matrix 10.

[0075] The extrusion temperature of room temperature extrusion is between 10°C and 90°C. For example, the extrusion temperature of room temperature extrusion is 10°C, 12°C, 15°C, 16°C, 18°C, 20°C, 25°C, 30°C, 40°C, 45°C, 50°C, 70°C, 75°C, 80°C, 85°C or 90°C, etc. If the temperature during the extrusion process is lower than 10°C, the mixed material has poor fluidity, slow production speed and low efficiency. If the temperature during the extrusion process is higher than 90°C, the mixed material flows too fast, and the pressure of the mixed material at the discharge port 14a is too small, which is not conducive to extrusion molding, resulting in a decrease in the yield rate. Therefore, the temperature of room temperature extrusion is between 10°C and 90°C, which can take into account the fluidity of the mixed material during the extrusion process and the smoothness of the outer surface of the extruded matrix 10.

[0076] It should be noted that in the field of extrusion, an extrusion temperature of 90° C. or higher is considered high-temperature extrusion, and an extrusion temperature of 10° C. or lower is considered low-temperature extrusion. The extrusion temperature is the temperature in the extrusion cavity of the extrusion device 1 .

[0077] S200: freeze-drying the extruded matrix.

[0078] The extruded matrix 10 is freeze-dried to reduce the liquid content. If the aerosol-generating matrix contains excessive liquid, the aerosol-generating matrix is ​​not easy to store and transport, and is easily deformed by force, because water is a component with a relatively high heat capacity, and it is also easy to "burn the mouth" when the aerosol-generating matrix is ​​heated. Therefore, the extruded matrix 10 contains a lot of solvents such as water and / or other volatile lubricants, and the solvents and / or lubricants need to be removed to obtain a dry aerosol-generating matrix for use or storage.

[0079] Freeze drying is a drying technology that utilizes the principle of sublimation. The extruded matrix 10 is quickly frozen at low temperatures, and then in a suitable vacuum environment, the frozen water molecules are directly sublimated into water vapor and escape, thereby reducing the water content in the extruded matrix 10.

[0080] The manufacturing method provided in the embodiment of the present application is to extrude the mixed material at room temperature, the mixed material has good fluidity, the surface smoothness of the extruded matrix 10 is good, and the extrusion molding effect is good, thereby ensuring good extrusion efficiency and faster production speed, and improving the yield rate. The use of freeze drying is conducive to retaining the endogenous substances in the extruded matrix 10, maintaining the morphology of the extruded matrix 10, and reducing the loss of effective substances such as alkaloids, smoke-generating agents and / or aroma components in the extruded matrix 10. During the freeze drying process, the water in the extruded matrix 10 is first frozen to form ice crystals. When the ice crystals sublimate and escape, micropores will be formed in the extruded matrix 10, and the volume of ice is greater than the volume of the same mass of water. Therefore, freeze drying is conducive to the formation of a microporous structure in the extruded matrix 10, and the porosity of the extruded matrix 10 is increased. The aerosol generation matrix obtained by extrusion and freeze drying at room temperature is an integrated molding structure. In this way, during the use of the aerosol generation matrix, for example, after being heated and sucked or stopped being heated, it is an integrated medium, and it is not easy to disintegrate and fall.

[0081] For example, in one embodiment, please refer to Figure 6 , Fig.14 and Fig.15 The aerosol generating matrix is ​​formed with an airway 10a, and the airway 10a runs through the opposite ends of the aerosol generating matrix in the longitudinal direction. The airflow can flow longitudinally from one end of the aerosol generating matrix to the other end of the aerosol generating matrix. In this way, the existence of the airway increases the specific surface area of ​​the matrix exposed to the outside, which can increase the amount of the matrix atomized after heating and mixed with air to form an aerosol, making the aerosol composition richer. In addition, the airflow formed by the air carrying the aerosol can flow more smoothly, and the airflow flow resistance is smaller, which can significantly reduce the suction resistance during the suction process and improve the suction experience.

[0082] In one embodiment, the air channel 10a may be formed inside the aerosol-generating substrate or on the outer peripheral surface of the aerosol-generating substrate.

[0083] In one embodiment, please refer to Fig.14 The air passage 10a is a straight air passage 10a extending in a straight line. The straight air passage 10a is easy to form and can reduce the manufacturing difficulty. The flow resistance of the airflow in the straight air passage 10a is relatively small.

[0084] In one embodiment, please refer to Fig.15 The air channel 10a is a curved air channel 10a, and at least part of the hole section of the curved air channel 10a is a curved shape with a non-zero curvature. The curved air channel 10a can greatly increase the flow path of the airflow without significantly increasing the length of the aerosol generating substrate, and can extend the contact time between the airflow and the hole wall of the curved air channel 10a, thereby improving the aerosol extraction rate.

[0085] In one embodiment, please refer to Fig.15 , the curved airway 10a is in a spiral shape. That is to say, the three-dimensional shape of the curved airway 10a is in a spatial spiral shape. For example, the curved airway 10a may be formed by rotating the die during the extrusion process. The line connecting any point of the spiral curved airway 10a and the starting point has an inclination angle relative to its axis. The spiral curved airway 10a can greatly extend the flow path of the airflow, precipitate the aerosol from the aerosol generating matrix into the curved airway 10a, increase the flow speed of the aerosol in the aerosol generating matrix, thereby increasing the impact force of the airflow, allowing the aerosol to be evenly mixed, improving the uniformity of the aerosol, and enhancing the user's inhalation experience.

[0086] It should be understood that the extruded substrate 10 has the same cross-sectional shape as the aerosol-generating substrate, and the extruded substrate 10 is a semi-finished product of the aerosol-generating substrate. In the case where the aerosol-generating substrate has air channels 10a, the extruded substrate 10 also has the same air channels 10a. It should be understood that the extruded substrate 10 can be dried to obtain a finished aerosol-generating substrate.

[0087] There is no limitation on the cross-sectional shape of the airway 10a located inside the aerosol generating matrix. For example, the cross-sectional shape may be circular, polygonal (including but not limited to triangle, square, prism, etc.), elliptical, racetrack-shaped or irregular-shaped, etc., wherein irregular-shaped refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0088] The cross-sectional shape of the airway 10a located on the outer peripheral surface of the aerosol generating substrate can be semicircular, semi-elliptical, polygonal or irregular, wherein irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0089] The number of the air passages 10a is not limited, and the air passages 10a may be one or more than one. More than one means that the number includes two or more than two.

[0090] It should be noted that the interior of the aerosol generating matrix may have a microporous structure. For example, for the aerosol generating matrix of the particle combination, the gaps between the particles constitute micropores, but the airway 10a described in the present application is different from the micropores. The airway 10a described in the present application belongs to the pores in the macroscopic sense, and the micropores belong to the pores in the microscopic sense. The cross-sectional area and length and other dimensions of the airway 10a are much larger than those of the micropores. The airway 10a is mainly processed by (a mold designed by a die), so the cross-sectional area and length and other dimensions of the airway 10a can be changed according to the design requirements, and the size of the micropores is determined by the gaps between the particles. For example, the mixed material is a granular material, and the extruded matrix 10 formed by extrusion of the mixed material has micropores. The cross-sectional area and length and other dimensions of the micropores are naturally formed by the extrusion process and the raw material components. The mixed raw material is added to the extrusion bin and flows out of the die mouth to produce a certain expansion to form micropores.

[0091] In one embodiment, the mixed material is extruded at room temperature using an extrusion device to form an extruded matrix, including:

[0092] S110: firstly mixing a plurality of raw materials into the mixed material;

[0093] S120: Adding the mixed material into the extrusion equipment.

[0094] In this embodiment, various raw materials such as plant raw materials, auxiliary raw materials and smoke agent raw materials are pre-mixed and formed into slurry, and then added to the extrusion equipment 1 for extrusion molding, that is, a slurry feeding method is adopted. The advantage of the slurry feeding method is that the mixed material has good consistency, which can ensure the uniformity and stability of the product.

[0095] In one embodiment, the mixed material is extruded at room temperature using an extrusion device to form an extruded matrix, including:

[0096] S130: Adding a plurality of raw materials into a plurality of feeding ports of the extrusion device respectively to form the mixed material in the extrusion device.

[0097] In this embodiment, various raw materials such as plant raw materials, auxiliary raw materials and smoke-generating agent raw materials are added to the extrusion device 1 in modules, and the raw materials are mixed in the extrusion device 1. That is, a module-based feeding method is adopted.

[0098] For example, see Figures 2 to 4, one of the multiple feeding ports 14b is a solid material feeding port 14b1 for adding solid material 100, and one of the multiple feeding ports 14b is a liquid material feeding port 14b2 for adding liquid material, and the liquid material feeding port 14b2 is located downstream of the solid material feeding port 14b1 along the raw material flow direction. When adding materials, the solid material 100 is first added through the solid material feeding port 14b1, and the liquid material is added when the solid material 100 reaches the liquid material feeding port 14b2. In addition, the feeding amount and speed can also be determined according to the production speed of the equipment and the raw material formula ratio. The advantage of this modular feeding method is that it can reduce the cost of raw material pre-treatment, ensure the continuity of the production process, and at the same time improve the product production efficiency.

[0099] For some examples, see Figures 2 to 4 The extrusion device 1 includes a feeding screw 16 rotatably arranged in the feed port. The feeding screw 16 can further homogenize the raw material and can better ensure continuous and stable feeding of the raw material.

[0100] In one embodiment, the mixed material includes, based on 100 parts by weight, 30 to 90 parts of plant raw materials, 1 to 15 parts of auxiliary raw materials, 5 to 30 parts of smoke-generating agent raw materials, 1 to 10 parts of adhesive raw materials, and 1 to 15 parts of flavor raw materials. Specifically, the total weight of the plant raw materials, auxiliary raw materials, smoke-generating agent raw materials, adhesive raw materials, and flavor raw materials is 100 parts.

[0101] Plant raw materials are used to generate aerosols when heated. Auxiliary raw materials are used to provide skeleton support for plant raw materials. Smoke-generating agent raw materials are used to generate a large amount of smoke when heated. Adhesive raw materials are used to bond component raw materials. Flavor raw materials are used to provide characteristic aromas. In this way, plant raw materials and smoke-generating agent raw materials can ensure the amount of aerosol generated, while flavor raw materials can enhance the release of aroma during the inhalation process and improve user experience. Auxiliary raw materials can not only improve the fluidity of the mixed materials, but also make the aerosol generation matrix porous to facilitate the extraction and flow of aerosols. Adhesive raw materials ensure that plant raw material powder and auxiliary agents form a stable mixture to avoid loose structure.

[0102] In one embodiment, the plant raw material is one or more combinations of powders formed by crushing tobacco raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, and aromatic plants. The plant raw material is the core source of flavor. The endogenous substances in the plant raw material can produce physiological satisfaction for the user. The endogenous substances, such as alkaloids, enter the human blood and promote the pituitary gland to produce dopamine, thereby obtaining physiological satisfaction.

[0103] In one embodiment, the auxiliary agent raw material can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant raw material, and the inorganic filler also has micropores, which can increase the porosity of the aerosol generation matrix, thereby increasing the aerosol release rate.

[0104] The lubricant includes one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the fluidity of the plant raw material powder, reduce the friction between the plant raw material powders, make the overall density of the plant raw material powder distribution more uniform, and also reduce the pressure required in the extrusion molding process, reducing the wear of the die 12.

[0105] The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to a certain extent, increase the stability of flavor substances, and improve the sensory quality of the product.

[0106] In one embodiment, the smoke-generating agent raw material may include: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, glycerol, triethylene glycol, 1,3-butylene glycol and tetraethylene glycol); an ester of a polyhydric alcohol (such as triacetin, triethyl citrate, a mixture of diacetin esters, triethyl citrate, benzyl benzoate, glyceryl tributyrate); a monocarboxylic acid; a dicarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a mixture of diacetin esters, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) or one or more combinations thereof.

[0107] In one embodiment, the adhesive raw material is in close contact with the component raw material interface by wetting, generating intermolecular attraction, thereby playing the role of bonding the component raw materials such as powders, liquids, etc. The adhesive raw material can be a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, guar gum, and modified cellulose (such as carboxymethyl cellulose). The adhesive is used to bond the particles together, which is not easy to loosen. In addition, it improves the water resistance of the aerosol generation matrix and is harmless to the human body.

[0108] In one embodiment, the flavor raw material is used to provide a characteristic aroma, such as a solid or liquid substance of hay aroma, roasted sweet aroma, and nicotine. The flavor raw material may include one or more combinations of tobacco, flavor plant extracts, extracts, essential oils, and absolute oils; the flavor raw material may include one or more combinations of monomer flavor substances, such as megastigmatriene, neophytadiene, geraniol, nerol, and the like.

[0109] See also Figures 2 to 4 The embodiment of the present application also provides a manufacturing system for an aerosol-generating matrix, the manufacturing system comprising an extrusion device 1 and a freeze-drying device 2.

[0110] The extrusion device 1 is used to extrude the mixed material at room temperature to form an extruded matrix 10 .

[0111] The freeze drying device 2 is used to freeze dry the extruded matrix 10 .

[0112] In the manufacturing system provided by the embodiment of the present application, if the extrusion temperature is too low, the fluidity of the mixed material is poor, the production speed of the extrusion device 1 is slow and the efficiency is low, and the torque required to be provided by the extrusion device 1 at this temperature is high, which affects the service life of the equipment; if the extrusion temperature is too high, the energy consumption of the extrusion device 1 is high, resulting in increased production costs. The extrusion device 1 adopts room temperature extrusion, with low energy consumption, fast generation speed and high efficiency. The freeze-drying device 2 can dry the extruded matrix 10 in batches, effectively reducing the intra-batch error. The dried extruded matrix 10 has high processability, and can realize the continuous production of the aerosol generation matrix, with high production efficiency and low manufacturing cost.

[0113] In one embodiment, please refer to Fig. 9 The freeze-drying device 2 may include a housing 21, a vacuum pump 22, a refrigeration system, a partition 23 and a tray 24. At least one partition 23 is provided in the housing 21, and the tray 24 is placed on the partition 23. The tray 24 is used to hold the extruded matrix 10. When the extruded matrix 10 needs to be freeze-dried, the tray 24 can be taken out, the extruded matrix 10 can be placed in the tray 24, and then the tray 24 can be placed on the partition 23 in the housing 21. The vacuum pump 22 is used to control the vacuum degree in the housing 21, and the refrigeration system adjusts the temperature of the partition 23 to provide heat for drying the extruded matrix 10.

[0114] In one embodiment, the freeze-drying device 2 may include an electrical instrument control system, which is used to monitor the ambient temperature in the box 21, such as the temperature of the partition 23, the temperature of the extruded matrix 10, and the ambient pressure in the box 21.

[0115] In one embodiment, please refer to Figures 4 to 7The extrusion device 1 comprises a bottom die 11 and a mouth die 12, and the mixed material is extruded from the mouth die 12 to form an extruded matrix 10. The mouth die 12 is used to form the extruded matrix 10 with a set cross-sectional shape.

[0116] In one embodiment, please refer to Figure 4 and Figure 5 , a mouth die 12 is arranged on a single bottom die 11. The bottom die 11 provides a mounting position for the mouth die 12. In other words, a single die and a single mouth are adopted. In this way, the size of the extrusion screw 15 can be smaller.

[0117] In one embodiment, please refer to Figure 7 , a single bottom die 11 is provided with a plurality of die openings 12. That is, a single die with multiple openings is adopted. After the mixed material passes through the plurality of die openings 12, a plurality of extruded matrices 10 are simultaneously formed. This can improve production efficiency and is suitable for mass production.

[0118] In one embodiment, please refer to Figure 8 , the number of the bottom mold 11 is multiple, the extrusion device 1 includes an adapter 13, and the multiple bottom molds 11 are arranged on the adapter 13. In other words, a multi-mode multi-port is adopted. Compared with a single-mode multi-port, a multi-mode multi-port can be installed with more dies 12, thereby forming more extruded matrices 10 at the same time. This can improve production efficiency and is more suitable for mass production.

[0119] In one embodiment, please refer to Figures 2 to 8 The extrusion device 1 includes an extrusion barrel 14 and an extrusion screw 15. The extrusion barrel 14 includes an extrusion cavity for accommodating a mixed material and a discharge port 14a connected to the extrusion cavity. The extrusion screw 15 is rotatably disposed in the extrusion cavity. The die 12 is disposed at the discharge port 14a, and the extrusion screw 15 pushes the mixed material to extrude from the die 12 to form an extruded matrix 10. The extrusion screw 15 is used to push the mixed material toward the discharge port 14a. Exemplarily, during the rotation of the extrusion screw 15, the mixed material can flow toward the discharge port 14a along the threaded channel of the circumferential surface of the extrusion screw 15.

[0120] In one embodiment, the bottom die 11 is connected to the discharge port 14 a so that the mixed material is extruded through the discharge port 12 .

[0121] In the case where there is an adapter 13, in one embodiment, the adapter 13 is connected to the discharge port 14a.

[0122] In one embodiment, the extrusion temperature of room temperature extrusion is between 35°C and 70°C. For example, the extrusion temperature of room temperature extrusion is 35°C, 36°C, 37°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 68°C or 70°C, etc. Since the higher the extrusion temperature during room temperature extrusion, the greater the energy consumption, and the lower the extrusion temperature, the lower the extrusion efficiency will be. The extrusion temperature of room temperature extrusion is between 35°C and 70°C, which can take into account both energy consumption and extrusion efficiency.

[0123] In one embodiment, the extrusion pressure of room temperature extrusion is between 0.5 bar and 300 bar. Exemplarily, the extrusion pressure of room temperature extrusion is 0.5 bar, 35 bar, 40 bar, 45 bar, 50 bar, 55 bar, 60 bar, 65 bar, 70 bar, 75 bar, 80 bar, 85 bar, 90 bar, 95 bar, 100 bar, 150 bar, 200 bar, 250 bar, 280 bar or 300 bar, etc. The extrusion pressure will affect the molding shape, outer surface smoothness, yield rate and production rate of the extruded matrix 10. When the extrusion pressure is less than 0.5 bar, the molding rate of the extruded matrix 10 is low, the defective rate increases, and then the production rate slows down and the production cost increases; when the extrusion pressure is greater than 300 bar, the transmission structure load of the extrusion device 1 is high (i.e., the torque required to be provided is high), resulting in a reduction in the service life of the extrusion device 1.

[0124] It should be noted that the extrusion pressure refers to the pressure at the adapter or die.

[0125] In one embodiment, the extrusion pressure of room temperature extrusion is between 20 bar and 80 bar. Exemplarily, the extrusion pressure of room temperature extrusion is 20 bar, 22 bar, 25 bar, 30 bar, 36 bar, 39 bar, 44 bar, 52 bar, 60 bar, 64 bar, 68 bar, 71 bar, 75 bar, 78 bar or 80 bar, etc. When the extrusion pressure is less than 20 bar, the molding rate is not significantly improved; when the extrusion pressure is greater than 80 bar, the energy consumption of the extrusion device 1 increases significantly, while the molding rate does not change much. Therefore, the extrusion pressure of room temperature extrusion is between 1 bar and 30 bar, which can take into account both the molding rate and energy consumption.

[0126] In one embodiment, freeze drying includes a freezing stage and a sublimation stage after the freezing stage, wherein the moisture in the extruded matrix 10 is frozen into ice crystals in the freezing stage, and the ice crystals in the extruded matrix 10 are sublimated in the sublimation stage, wherein the temperature of the extruded matrix 10 in the sublimation stage is higher than the temperature of the extruded matrix 10 in the freezing stage.

[0127] The freezing stage freezes the water in the extruded matrix 10 into ice crystals, and reaches a sublimable state. The freezing stage refers to the extruded matrix 10 being kept at a freezing temperature for a set period of time, so that the water in the extruded matrix 10 is frozen into ice crystals, and reaches a sublimable state. The temperature of the extruded matrix 10 in the sublimation stage is higher than the temperature of the extruded matrix 10 in the freezing stage. This is conducive to the sublimation of ice crystals in the extruded matrix 10.

[0128] It should be noted that the set duration can be specifically set according to manufacturing requirements.

[0129] The sublimation stage refers to the stage of sublimation of ice crystals in the extruded matrix 10. The purpose of the sublimation stage is to rapidly sublimate the water frozen into ice crystals in the extruded matrix 10. The environmental pressure in the sublimation stage is at a low vacuum degree, which is conducive to the sublimation of ice crystals.

[0130] In one embodiment, freeze drying includes a pre-freezing stage prior to the freezing stage, during which the temperature of the extruded matrix 10 is reduced so that the temperature of the extruded matrix 10 reaches -30°C to 0°C, inclusive.

[0131] The pre-freezing stage refers to the stage in which the extruded matrix 10 reaches the temperature of the freezing stage from the extrusion temperature, such as room temperature or other temperatures, and its purpose is to make the extruded matrix 10 reach the temperature of the freezing stage to facilitate freeze drying and improve freeze drying efficiency.

[0132] The extruded matrix 10 can be pre-frozen by means of liquid nitrogen, liquid air or dry ice or the like through a low-temperature refrigerator or the like, so that the temperature of the extruded matrix 10 after pre-freezing is -30°C to 0°C, thereby improving the processing efficiency of the freeze-drying device 2.

[0133] In one embodiment, after the sublimation stage, freeze drying includes a desorption stage during which bound water in the extruded matrix 10 evaporates.

[0134] The desorption stage refers to the stage of evaporating the bound water in the extruded matrix 10. After the sublimation stage, there is still some unfrozen bound water in the extruded matrix 10. In this stage, the ambient temperature of freeze drying, i.e., the temperature of the partition 23 and the temperature of the extruded matrix 10, can be increased, and the extruded matrix 10 is placed under a relatively low vacuum ambient pressure to promote the evaporation of bound water. The purpose of the desorption stage is to remove at least part of the bound water in the extruded matrix 10 so that the moisture content in the extruded matrix 10 reaches the target value.

[0135] Freeze drying requires continuous control of the temperature of the extruded matrix 10 in the housing 21, the absolute vacuum, and the ambient temperature, such as the temperature of the partition 23. The temperature of the extruded matrix 10 is the surface temperature of the extruded matrix 10 in the housing 21. The ambient temperature of freeze drying is the temperature of the partition 23 of the freeze drying device 2. Fig.10 Freeze drying may include a pre-freezing stage (a), a freezing stage (b), a sublimation stage (c) and a decomposition stage (d). The temperature of the extruded matrix 10, the absolute vacuum degree and the ambient temperature of freeze drying may vary to a certain extent in each stage.

[0136] The partition 23 may be controlled by a heater type or an intermediate fluid type, and the temperature of the partition 23 is controlled by the partition 23 through heat conduction and / or heat radiation.

[0137] Exemplarily, in one embodiment, the ambient temperature of freeze drying is -70°C to 50°C. For example, the ambient temperature of freeze drying is -70°C, -65°C, -60°C, -55°C, -50°C, -45°C, -40°C, -35°C, -30°C, -25°C, -20°C, -15°C, -10°C, -5°C, 0°C, 5°C, 10°C, 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 45°C or 50°C, etc. Freeze drying adopts the above temperature, and the water in the extruded matrix 10 can be frozen and sublimated at an appropriate speed. While effectively reducing the water in the extruded matrix 10, the aroma components and effective substances (such as alkaloids and smoke-generating agents) in the mixed material can be retained as much as possible, thereby ensuring product quality and reducing production costs.

[0138] In one embodiment, the temperature of the extruded matrix 10 in the freezing stage (b) is -100°C to -30°C. Exemplarily, the temperature of the extruded matrix 10 in the freezing stage is -100°C, -95°C, -90°C, -85°C, -80°C, -75°C, -70°C, -65°C, -60°C, -55°C, -50°C, -45°C, -40°C, -35°C or -30°C, etc. When the temperature of the extruded matrix 10 in the freezing stage is higher than -30°C, it takes a long time for the water in the extruded matrix 10 to freeze and sublimate, the production efficiency is low, the required equipment occupies a large area, and the production cost is high. When the temperature of the extruded matrix 10 in the freezing stage is lower than -100°C, the alcohol smoke agent in the extruded matrix 10 may also freeze and sublimate, thereby causing the loss of effective substances, and the refrigeration system is difficult to reach below -100°C, and the cost investment is high. When the temperature of the extruded matrix 10 in the freezing stage is -100°C to -30°C, the moisture in the extruded matrix 10 can be frozen and sublimated at an appropriate speed, which can effectively reduce the moisture in the extruded matrix 10 while retaining the aroma components and effective substances (such as alkaloids, smoke-generating agents) in the mixed material as much as possible, thereby ensuring product quality and reducing production costs.

[0139] In one embodiment, the temperature of the extruded matrix 10 in the sublimation stage (c) is greater than -100° C. and less than -30° C. Exemplarily, the temperature of the extruded matrix 10 in the sublimation stage is -99° C., -95° C., -90° C., -85° C., -80° C., -75° C., -70° C., -65° C., -60° C., -55° C., -50° C., -45° C., -40° C., -35° C., or -31° C., etc.

[0140] Preferably, the temperature of the extruded matrix 10 during the freezing stage and / or the sublimation stage may be between -80°C and -40°C.

[0141] In one embodiment, the temperature of the extruded matrix 10 in the parsing stage (d) is 0°C to 50°C. For example, the temperature of the extruded matrix 10 in the parsing stage is 0°C, 5°C, 10°C, 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 45°C or 50°C, etc. If the temperature of the extruded matrix 10 in the parsing stage is less than 0°C, the energy that the extruded matrix 10 can obtain is less, which is not conducive to the evaporation of bound water in the extruded matrix 10. If the temperature of the extruded matrix 10 in the parsing stage is greater than 50°C, the loss of effective substances (such as smoke agents, etc.) in the extruded matrix 10 may be caused, thereby affecting the quality of the extruded matrix 10. When the temperature of the extruded matrix 10 in the parsing stage is 0°C to 50°C, the bound water in the extruded matrix 10 can evaporate at an appropriate speed, effectively reducing the moisture in the extruded matrix 10, while also retaining the aroma components and effective substances (such as alkaloids, smoke agents) in the mixed material as much as possible to ensure product quality.

[0142] Preferably, the temperature of the extruded matrix 10 during the desorption stage is between 20°C and 35°C.

[0143] In one embodiment, in the pre-freezing stage, the temperature of the partition 23 can be consistent with the temperature of the extruded matrix 10. In this stage, the extruded matrix 10 releases heat and lowers the temperature so that the water in the extruded matrix 10 forms ice crystals, thereby, the temperature of the partition 23 can be consistent with the temperature of the extruded matrix 10.

[0144] In one embodiment, during the freezing stage, the temperature of the partition 23 can be consistent with the temperature of the extruded matrix 10. In this stage, the extruded matrix 10 releases heat to reduce the temperature so that the water in the extruded matrix 10 forms ice crystals, thereby, the temperature of the partition 23 can be consistent with the temperature of the extruded matrix 10.

[0145] In one embodiment, during the sublimation stage, the ambient temperature during the sublimation stage is 10° C. to 60° C. higher than the temperature of the extruded substrate 10. For example, the ambient temperature during the sublimation stage is 10° C., 15° C., 20° C., 25° C., 30° C., 35° C., 40° C., 45° C., 50° C., 55° C., or 60° C. higher than the temperature of the extruded substrate 10.

[0146] The ambient temperature during the freeze-drying process may be the temperature of the partition 23. In the sublimation stage, the ambient temperature in the sublimation stage is 10°C to 60°C higher than the temperature of the extruded matrix 10, that is, in the sublimation stage, the temperature of the partition 23 is 10°C to 60°C higher than the temperature of the extruded matrix 10. The temperature of the partition 23 is higher than the temperature of the extruded matrix 10, which can provide the extruded matrix 10 with the energy required for the sublimation of ice crystals. If the temperature difference between the ambient temperature in the sublimation stage and the temperature of the extruded matrix 10 is less than 10°C, the energy that can be provided by the freeze-drying environment is less, and the sublimation of ice crystals is slower. If the temperature difference between the ambient temperature in the sublimation stage and the temperature of the extruded matrix 10 is greater than 60°C, the sublimation of ice crystals is rapid, which may cause the collapse of the extruded matrix 10, etc., thereby reducing the quality of the product.

[0147] In the sublimation stage, when the ambient temperature in the sublimation stage is 10°C to 60°C higher than the temperature of the extruded matrix 10, the ambient temperature in the sublimation stage can provide sufficient energy for the sublimation of ice crystals, and the ice crystals in the extruded matrix 10 can sublime at an appropriate speed, which can avoid causing the extruded matrix 10 to collapse to a certain extent and ensure product quality.

[0148] Preferably, the ambient temperature during the sublimation phase is 20° C. to 40° C. higher than the temperature of the extruded matrix 10 .

[0149] In one embodiment, during the parsing stage, the ambient temperature during the parsing stage is 0°C to 5°C higher than the temperature of the extruded matrix 10. For example, the ambient temperature during the parsing stage is 0°C, 1°C, 2°C, 3°C, 4°C or 5°C higher than the temperature of the extruded matrix 10. When the ambient temperature during the parsing stage is 0°C to 5°C higher than the temperature of the extruded matrix 10, it is beneficial to remove at least part of the bound water in the extruded matrix 10 so that the moisture in the extruded matrix 10 reaches the target value. When the difference between the ambient temperature during the parsing stage and the temperature of the extruded matrix 10 is 0, it means that the ambient temperature during the parsing stage is consistent with the temperature of the extruded matrix 10.

[0150] In one embodiment, the absolute vacuum degree of the ambient pressure during the analysis phase is 1 Pa to 40 Pa. For example, the absolute vacuum degree of the ambient pressure during the analysis phase is 1 Pa, 2 Pa, 3 Pa, 10 Pa, 15 Pa, 16 Pa, 17 Pa, 18 Pa, 19 Pa, 20 Pa, 21 Pa, 22 Pa, 23 Pa, 24 Pa, 25 Pa, 26 Pa, 27 Pa, 28 Pa, 29 Pa, 30 Pa, 31 Pa, 33 Pa, 35 Pa, 36 Pa, 37 Pa, 38 Pa, 39 Pa or 40 Pa, etc.

[0151] In one embodiment, the absolute vacuum degree of the ambient pressure during the sublimation stage is 1 Pa to 40 Pa.

[0152] A low absolute vacuum is conducive to the sublimation of ice crystals, but when the absolute vacuum is less than 1Pa, it is not conducive to heat transfer, and the extruded matrix 10 is not easy to obtain heat. At the same time, it is easy to cause uneven temperature inside the extruded matrix 10 and high local temperature, thereby affecting the morphology of the extruded matrix 10; when the absolute vacuum is greater than 40Pa, the heat absorbed by the extruded matrix 10 will decrease, the sublimation rate will slow down, the production efficiency will be reduced, and it will be time-consuming and energy-consuming.

[0153] The absolute vacuum is positively correlated with the boiling point of water, that is, the lower the absolute vacuum, the lower the boiling point of water. Therefore, by controlling the absolute vacuum, the boiling point of water in the extruded matrix 10 can be controlled, which is beneficial to the evaporation of bound water in the extruded matrix 10.

[0154] In addition, low temperature is conducive to retaining endogenous substances in the extruded matrix 10. Therefore, setting the absolute vacuum degree of the ambient pressure within the range of 1Pa to 40Pa is conducive to the evaporation of bound water in the extruded matrix 10 under low temperature conditions. This can not only effectively reduce the moisture in the extruded matrix 10, but also retain the aroma components and effective substances (such as alkaloids, smoke-generating agents, etc.) in the raw materials as much as possible, thereby ensuring product quality.

[0155] When the ambient temperature of freeze drying is 1Pa to 40Pa in absolute vacuum during the sublimation stage and the decomposition stage, it is beneficial to heat transfer so that the extruded matrix 10 obtains sufficient heat, which is beneficial to the sublimation of ice crystals and the evaporation of bound water, thereby improving production efficiency and reducing energy consumption.

[0156] Preferably, the absolute vacuum degree of the ambient pressure in the sublimation stage and / or the ambient pressure in the desorption stage is 5 Pa to 30 Pa.

[0157] In one embodiment, the water content of the dried extruded matrix 10 is 3% to 20%. That is, the water content of the dried extruded matrix 10 is 3% to 20% of the total weight of the extruded matrix 10. Preferably, the water content of the dried extruded matrix 10 is between 4% and 13%. Exemplarily, the water content of the dried extruded matrix 10 is 3%, 4%, 5%, 10%, 11%, 13%, 15%, 16%, 18% or 20%, etc. When the water content of the dried extruded matrix 10 is less than 3%, not only is the dried extruded matrix 10 fragile in the subsequent production and processing process, resulting in a high subsequent production defect rate of the dried extruded matrix 10, thereby increasing the production cost; and during the heating and suction process, the impurities generated by the aerosol-generating matrix are high, affecting the suction experience. When the water content of the dried extruded matrix 10 is greater than 20%, the water content of the aerosol of the dried extruded matrix 10 is high during the heating and suction process, and it is easy to produce a "hot mouth" phenomenon during the suction process, reducing the suction experience.

[0158] In one embodiment, after the mixed material is extruded at room temperature to form an extruded matrix, the manufacturing method includes:

[0159] S300: cutting the extruded matrix into a set length.

[0160] See also Figures 2 to 4 The extruded matrix 10 can be cut by the cutting device 3 so that the extruded matrix 10 reaches a set length. The extruded matrix 10 can be cut into a desired length according to different usage scenarios.

[0161] It is understood that the specific value of the set length is not limited, and the set length can be set according to the aerosol generating substrate or according to the equipment conditions of the manufacturing system. For example, the set length can be equal to the length of the aerosol generating substrate.

[0162] In some embodiments, the extruded matrix 10 extruded at room temperature is in a continuous structure. That is, during the extrusion process, the extruded matrix 10 is continuously extruded so that the extruded matrix 10 is in a continuous structure. Continuous extrusion can improve extrusion efficiency, and the extruded matrix 10 is subsequently cut to a set length.

[0163] In some embodiments, the extruded matrix 10 is in a segmented structure of a set length. That is, during the extrusion process, the extruded matrix 10 is naturally separated when it reaches the set length. For example, the extruded matrix 10 may be separated from the die 12 when it reaches a critical value. In this way, the set length of the extruded matrix 10 may be the length of the aerosol generating matrix, and the extruded matrix 10 may not be cut, which can save the cutting equipment 3 and reduce the equipment cost.

[0164] It should be noted that, in some embodiments, step S300 may be before step S200, that is, the extruded matrix 10 may be cut before freeze-drying the extruded matrix 10. In some embodiments, step S300 may be after step S200, that is, the extruded matrix 10 may be cut after freeze-drying the extruded matrix 10.

[0165] In one embodiment, the manufacturing method includes:

[0166] S400: After the mixed material is extruded at room temperature to form an extruded matrix, the extruded matrix is ​​pre-cut to a preset length;

[0167] S500: After freeze-drying the extruded matrix of a preset length, cutting the extruded matrix into the set length.

[0168] Specifically, the preset length may be greater than the set length.

[0169] Pre-cutting is performed before freeze drying, and cutting is performed after freeze drying. The difference between pre-cutting and cutting is mainly that the length of the extruded matrix 10 after cutting is different. The purpose of pre-cutting is to obtain a length that is convenient for the extruded matrix 10 to enter the freeze drying device 2. In this embodiment, the extruded matrix 10 extruded from the extrusion device 1 is first pre-cut so that the extruded matrix 10 is a preset length, and the preset length matches the freeze drying device 2 or other suitable length before freeze drying, and cutting is performed after freeze drying to obtain a set length, such as the length of the aerosol generating matrix.

[0170] The texture of the extruded matrix 10 extruded by the extrusion device 1 is usually relatively soft, so before the extruded matrix 10 is freeze-dried, the pre-cutting of the extruded matrix 10 is equivalent to pre-cutting the soft extruded matrix 10. After the extruded matrix 10 of a preset length is freeze-dried, the water in the extruded matrix 10 is removed and the hardness of the extruded matrix 10 increases. Therefore, after freeze-drying, the cutting of the extruded matrix 10 of a preset length is equivalent to cutting the extruded matrix 10 with a relatively hard texture. During the freeze-drying process of the extruded matrix 10, the volume of the extruded matrix 10 will shrink. Therefore, the pre-cutting-freeze-drying-cutting method can improve the consistency of the longitudinal dimension, i.e., the length, of the extruded matrix 10 after cutting, and thus improve the yield rate of cutting.

[0171] It should be noted that the pre-slitting can also be performed by a slitting tool of the slitting device 3. The slitting and pre-slitting can be performed by the same or different slitting tools.

[0172] It should be understood that in some embodiments, the manufacturing method may not have a slitting step, that is, the extruded matrix 10 of a set length can be directly extruded through extrusion molding. For example, when the extruded matrix 10 is extruded in a vertical direction, the extruded matrix 10 can naturally detach under the action of its own gravity when the set length is reached, thereby reducing the subsequent slitting steps and further reducing production costs.

[0173] Exemplarily, in one embodiment, the manufacturing method includes: S700, correcting the shape of the extruded matrix. Correction refers to correcting the circumference and / or straightness of the extruded matrix 10 by a jig. Straightness refers to the degree of curvature of the extruded matrix 10 in the longitudinal direction.

[0174] Since the texture of the extruded matrix 10 extruded by room temperature extrusion molding is usually relatively soft, during the manufacturing process of the extruded matrix 10, the circumference of the extruded matrix 10 is deformed and / or the extruded matrix 10 is bent in the longitudinal direction. For example, during the pre-slitting and / or slitting process of the extruded matrix 10, the circumference of the extruded matrix 10 may be deformed and / or the extruded matrix 10 may be bent in the longitudinal direction. Therefore, the extruded matrix can be calibrated for circumference and / or straightness by a jig.

[0175] It should be noted that step S700 can be implemented in any case where correction is required after step S100, and step S700 can be implemented once or multiple times during the entire manufacturing process of the aerosol generating substrate.

[0176] For example, after the extruded matrix 10 is pre-cut, a jig may be used to circumferentially align the extruded matrix 10, and then the shaped extruded matrix 10 may be freeze-dried.

[0177] For example, after the extruded matrix 10 is freeze-dried and before the extruded matrix 10 is cut into set lengths, a jig may be used to calibrate the circumference and straightness of the extruded matrix 10 .

[0178] See also Figure 2 and Figure 3 For a manufacturing system that needs to perform pre-cutting, the manufacturing system can be provided with two cutting devices 3. The first cutting device 3 is used for pre-cutting, and the second cutting device 3 is used for cutting.

[0179] In order to facilitate the cutting of the extruded matrix 10 after the extruded matrix 10 is freeze-dried, the manufacturing system can also set a conveying device 6 between the freeze-drying device 2 and the first cutting device 3, and the extruded matrix 10 that has completed freeze-drying in the freeze-drying device 2 is transported to the second cutting device 3 through the conveying device 6 for cutting.

[0180] In one embodiment, before freeze-drying the extruded matrix, the manufacturing method comprises:

[0181] S600: subjecting the extruded matrix to a cooling and hardening treatment.

[0182] Because the mixed material is a solid-liquid mixture, the hardness of the extruded matrix 10 after extrusion at room temperature is relatively low, so that the extruded matrix 10 after extrusion at room temperature is easily deformed, and it is difficult to maintain the form of the extruded matrix 10. In order to improve the stability of the extruded matrix 10 form, it is convenient for subsequent processes such as the slitting process, and the extruded matrix 10 is hardened to improve its hardness. After hardening treatment, the hardness of the extruded matrix 10 is improved, and the temperature of the extruded matrix 10 is also reduced. In this way, it is more conducive to freeze drying the extruded matrix 10, thereby improving production efficiency.

[0183] For the manufacturing method with the slitting step, the extruded matrix 10 can be slid after the extruded matrix 10 is cooled and hardened. Since the hardness of the extruded matrix 10 increases after the extruded matrix 10 is cooled and hardened, the extruded matrix 10 is easier to slid after the extruded matrix 10 is cooled and hardened, and the extruded matrix 10 after slitting will not be deformed, and the cut surface is more neat and complete.

[0184] In some embodiments, the hardness of the extruded matrix 10 before hardening is between 0HB and 100HB (including 0HB and 100HB), for example, the hardness of the extruded matrix 10 before hardening is between 1HB and 60HB (including 1HB and 60HB), which makes the extruded matrix 10 before hardening soft and easy to deform.

[0185] In one embodiment, the hardness of the extruded matrix 10 after hardening is between 1HB and 200HB. Preferably, the hardness of the extruded matrix 10 after hardening is between 40HB and 120HB. Exemplary, the hardness of the extruded matrix 10 after hardening is 1HB, 10HB, 20HB, 30HB, 40HB, 50HB, 55HB, 60HB, 70HB, 80HB, 85HB, 90HB, 95HB, 100HB, 110HB, 120HB, 130HB, 140HB, 150HB, 160HB, 170HB, 180HB, 190HB or 200HB or the like. Under this hardness range, the extruded matrix 10 after hardening can maintain the form well, avoid the situation that the outer surface of the extruded matrix 10 after hardening can adhere to other structures, the extruded matrix 10 after hardening is easy to cut, and the extruded matrix 10 after cutting is not easy to deform, and the end face formed by cutting is integral and complete.

[0186] It should be noted that HB is the Brinell hardness.

[0187] In one embodiment, the hardness of the extruded matrix 10 after freeze drying is between 40HB and 300HB (including 40HB and 300HB). Preferably, the hardness of the extruded matrix 10 after freeze drying is between 80HB and 250HB (including 80HB and 250HB).

[0188] In one embodiment, the extruded matrix is ​​subjected to a cooling and hardening treatment, comprising: placing the extruded matrix in a cooling environment temperature for cooling and hardening, wherein the cooling environment temperature is lower than the hardening temperature of the extruded matrix.

[0189] Exemplarily, the hardening temperature of the extruded matrix 10 is -100°C to 60°C (including -100°C and 60°C). Preferably, the hardening temperature of the extruded matrix 10 is -30°C to 40°C (including -30°C and 40°C).

[0190] The temperature of the cooling environment is between -270°C and 60°C (including -270°C and 60°C). Preferably, the temperature of the cooling environment is between -100°C and 40°C (including -100°C and 40°C).

[0191] In one embodiment, the temperature of the extruded matrix 10 before hardening is between 0° C. and 40° C., and the temperature of the extruded matrix 10 after hardening is between -50° C. and 5° C. Exemplarily, the temperature of the extruded matrix 10 after hardening is -50° C., -45° C., -40° C., -39° C., -35° C., -30° C., -25° C., -20° C., -15° C., -10° C., -5° C., 0° C., 1° C., 3° ​​C., or 5° C., etc.

[0192] In one embodiment, please refer to Figure 3 , the extruded matrix 10 is extruded in the horizontal direction. For example, the discharge port 14a faces the horizontal direction, and the die 12 can be arranged in the horizontal direction. Exemplarily, for an extruded matrix 10 having a curved, for example, spiral airway 10a, after the extruded matrix 10 is extruded in the horizontal direction, the extruded matrix 10 can be directly fed into the next device through a rotating die, and the horizontal extrusion can reduce the direct release of the stress generated by the rotation of the extruded matrix 10 (the generated stress can be eliminated by heating), thereby improving the yield rate of the aerosol-generating matrix having the spiral airway 10a.

[0193] In one embodiment, please refer to Figure 4 , the extruded matrix 10 is extruded in a vertical direction relative to the horizontal direction. For example, the discharge port 14a faces downward, and the die 12 can be arranged in a vertical direction. In other words, the extruded matrix 10 is extruded in the direction of gravity. Exemplarily, for the extruded matrix 10 with a linear air channel 10a, the extruded matrix 10 is extruded in a vertical direction to improve the yield rate, reduce the investment cost of the extrusion device 1, and further reduce the floor space of the extrusion device 1.

[0194] In one embodiment, the extruded matrix 10 is extruded along an inclined direction relative to the horizontal direction. The inclined direction refers to the angle between the extrusion direction of the extruded matrix 10 and the horizontal plane being greater than 0° and less than 90°. Inclined extrusion can not only reduce the extrusion pressure of the mixed material, but also facilitate the space design of other equipment such as the freeze-drying equipment 2.

[0195] The following are several specific embodiments to illustrate the manufacturing method of the present application, which are described in detail as follows:

[0196] In the first specific embodiment, the aerosol generating matrix is ​​obtained through steps S100, S600, S300, and S200 in sequence. In this embodiment, the extrusion molding is performed through step S100, and the extruded matrix 10 is hardened through step S600. The hardness of the extruded matrix 10 can be increased by hardening so as to perform the cutting in step S300, and finally the moisture content of the extruded matrix 10 is reduced through S200, and finally the finished aerosol generating matrix is ​​obtained.

[0197] In the second specific embodiment, the aerosol generating matrix is ​​obtained through steps S100, S300, and S200 in sequence. The difference between this embodiment and the first specific embodiment is that the hardening step S600 is omitted, that is, the extruded matrix 10 extruded from the extrusion device 1 can be directly cut, and when the length of the aerosol generating matrix is ​​short, the slight deformation caused by the cutting has no effect on the subsequent production, and the hardening step can be omitted.

[0198] In the third specific embodiment, the aerosol generating matrix is ​​obtained by sequentially performing steps S100, S400, and S500. The difference between this embodiment and the second specific embodiment is that pre-cutting is performed before freeze drying, and cutting is performed after freeze drying. In this embodiment, the extruded matrix 10 extruded from the extrusion device 1 is first freeze dried and then cut. During the freeze drying process, the volume of the extruded matrix 10 may shrink. By freeze drying first and then cutting, the consistency of the longitudinal dimension, i.e., the length, of the extruded matrix 10 after cutting can be improved.

[0199] In the fourth specific embodiment: the aerosol generating matrix is ​​obtained by sequentially performing steps S100 and S200. The difference between this embodiment and the first specific embodiment is that the hardening step and the cutting step are reduced, that is, the finished aerosol generating matrix is ​​obtained after the extruded matrix 10 is freeze-dried. Exemplarily, the extruded matrix 10 is extruded in the vertical direction, and the extruded matrix 10 reaches a set length (for example, the extruded matrix 10 reaches a critical value), and the extruded matrix 10 will naturally detach (separate), and the set length of the extruded matrix 10 is the length required for the aerosol generating matrix. In this way, there can be no hardening step and cutting step, thereby reducing the subsequent processing process and reducing the production cost.

[0200] In one embodiment, the manufacturing method includes:

[0201] A packaging layer is wrapped around the outer surface of the aerosol generating substrate by a packaging device.

[0202] See also Figures 2 to 4 , the aerosol generating substrate enters the packaging device 5, and the packaging device 5 wraps the packaging layer to the outer surface of the aerosol generating substrate. That is, after obtaining the finished aerosol generating substrate, the packaging layer can be wrapped on the outer surface of the aerosol generating substrate.

[0203] The packaging layer includes but is not limited to one or more combinations of fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE (Polyethylene), PBAT (Polybutylene Adipate Terephthalate) and other materials.

[0204] In some embodiments, the packaging layer may be wrapped around the outer surface of the aerosol-generating substrate and then combined with the functional segment to form an aerosol-generating product.

[0205] In other embodiments, the aerosol generating substrate may be first combined with the functional segment, and then the outer surfaces of the aerosol generating substrate and the functional segment are wrapped with a packaging layer to form an aerosol generating product.

[0206] In some other embodiments, the outer surface of the aerosol generating substrate may be first wrapped with a packaging layer, and then combined with the functional segment and wrapped with the packaging layer to form an aerosol generating product. In other words, the outer surface of the aerosol generating substrate may be wrapped with multiple packaging layers.

[0207] In one embodiment, please refer to Figure 2 , Figure 3 and Fig.11 The manufacturing system includes a hardening device 4, which is used to cool and harden the extruded matrix 10 to increase the hardness of the extruded matrix 10. The hardening device 4 is located downstream of the extrusion device 1 along the flow direction of the extruded matrix 10.

[0208] In one embodiment, please refer to Fig.11 and Fig.12 The hardening device 4 includes a housing 41, which is formed with an inlet, a cold chamber 41a and an outlet, both of which are connected to the cold chamber 41a, and the cold chamber 41a is used to cool and harden the extruded matrix 10. The extruded matrix 10 enters the cold chamber 41a through the inlet, and flows out of the housing 41 through the outlet after being cooled and hardened in the cold chamber 41a.

[0209] In one embodiment, please refer to Fig.11 and Fig.12 The housing 41 is formed with a filling port 41b, which is connected to the cold chamber 41a to inject the refrigerant into the cold chamber 41a. The refrigerant contacts the extruded matrix 10 in the cold chamber 41a to absorb the heat of the extruded matrix 10, thereby cooling and hardening the extruded matrix 10. In this way, the outer surface of the hardened extruded matrix 10 can be quickly cooled, the stability of the shape of the extruded matrix 10 can be maintained, continuous production can be facilitated, and production efficiency can be improved.

[0210] The refrigerant may be in liquid, gaseous or solid state. For example, the refrigerant includes but is not limited to liquid nitrogen or liquefied air.

[0211] In one embodiment, please refer to Fig.11 and Fig.12, hardening device 4 comprises conveyor belt 42, and at least part of conveyor belt 42 is located in cold chamber 41a, and conveyor belt 42 is used for extruding matrix 10 and being transmitted to outlet from entrance.Extruded matrix 10 is placed on conveyor belt 42 by entrance, and is transmitted to outlet by conveyor belt 42.The continuous transmission of extruded matrix 10 can be realized by conveyor belt 42, so that extruded matrix 10 can be hardened through hardening device 4 in an endless stream, and continuous generation is realized.Conveyor belt 42 is formed with a plurality of guide grooves 42a towards the surface of extruded matrix 10, and each guide groove 42a is used for placing an extruded matrix 10, and at least part of extruded matrix 10 is located in guide groove 42a.On the one hand, the groove wall surface of guide groove 42a can limit extruded matrix 10 and move, to avoid extruded matrix 10 displacement during transmission.On the other hand, each guide groove 42a is used for placing an extruded matrix 10, and guide groove 42a can prevent multiple extruded matrix 10 from contacting and sticking.

[0212] In one embodiment, please refer to Fig.11 and Fig.12 The filling port 41 b may be formed on the upper surface of the housing 41 . In this way, the refrigerant may enter the cold chamber 41 a from top to bottom to contact the extruded substrate 10 on the conveyor belt 42 .

[0213] Exemplarily, the length direction of the guide groove 42 a is consistent with the conveying direction of the conveyor belt 42 , and a plurality of guide grooves 42 a are arranged at intervals along the width direction of the conveyor belt 42 .

[0214] Exemplarily, the cross-sectional shape of the guide groove 42a is not limited, and the cross-sectional shape of the guide groove 42a may be semicircular or semi-elliptical, etc.

[0215] For example, in one embodiment, please refer to Fig.11 and Fig.12 The filling port 41 b extends in a direction intersecting with the conveying direction of the conveyor belt 42 .

[0216] In one embodiment, please refer to Fig.13 The housing 41 is formed with a refrigerant channel 41b, the cold cavity 41a and the refrigerant channel 41b are isolated from each other and are located in the refrigerant channel 41b, and the extruded matrix 10 is in contact with the cavity wall of the cold cavity 41a. In other words, the refrigerant does not contact the extruded matrix 10. The refrigerant flows in the refrigerant channel 41b, and the extruded matrix 10 and the refrigerant transfer heat through the cavity wall of the cold cavity 41a. In this way, the extruded matrix 10 can be prevented from directly contacting the refrigerant, and the problem of expansion deformation and cracking after rapid cooling can be avoided.

[0217] In one embodiment, please refer to Fig.13The shell 41 includes an outer shell 411 and an inner shell 412. The inner shell 412 is formed with a cold cavity 41a. The inner shell 412 is located in the outer shell 411 and defines a coolant channel 41b together. The shell 41 is a double-layer shell structure. The coolant channel 41b defined by the outer shell 411 and the inner shell 412 is used to flow the coolant. The cold cavity 41a and the coolant channel 41b are separated by the inner shell 412. The extruded matrix 10 contacts the inner surface of the inner shell 412 to transfer heat to the coolant through the inner shell 412.

[0218] In one embodiment, the smoothness of the cavity wall of the cold cavity 41a is between Ra1.2μm and Ra0.08μm. Ra refers to the average surface roughness value, which is used to indicate the smoothness and roughness of the surface. Exemplarily, the smoothness of the cavity wall of the cold cavity 41a is Ra1.2μm, Ra1.1μm, Ra1.0μm, Ra0.5μm, Ra0.3μm, Ra0.1μm or Ra0.08μm, etc. The cavity wall of the cold cavity 41a is a smooth surface, and the friction between the cavity wall of the cold cavity 41a and the outer surface of the extruded matrix 10 is very small, which will not cause the extruded matrix 10 to deform.

[0219] In one embodiment, the hardening device 4 includes a refrigerant supplier, and the refrigerant supplier is connected to the filling port 41b or the refrigerant supplier is connected to the refrigerant channel 41b. In other words, the refrigerant supplier is used to inject refrigerant into the filling port 41b. Alternatively, the refrigerant supplier is used to inject refrigerant into the refrigerant channel 41b.

[0220] In one embodiment, please refer to Figures 2 to 4 The manufacturing system includes a slitting device 3 having a slitting tool, and the slitting tool slits the extruded matrix 10 by physical contact or non-physical contact.

[0221] Physical contact refers to slitting the extruded matrix 10 by direct contact of the slitting tool with the extruded matrix 10. For example, the slitting tool can be a rotating rotary cutter, a cutting blade, a cutting wire, a roll cutter, or an extruder.

[0222] Non-physical contact means that the slitting tool does not need to be in direct contact with the extruded matrix 10, but the extruded matrix 10 is cut by the material released by the slitting tool. For example, the slitting tool releases laser, plasma, air knife or water knife to cut the extruded matrix 10.

[0223] It should be noted that the manufacturing system used in the embodiment of the present application can be used for the manufacturing method of the embodiment of the present application, and the description of the manufacturing system embodiment is similar to the description of any one of the embodiments of the manufacturing method, and has the same beneficial effects as the manufacturing method embodiment. For technical details not disclosed in the manufacturing method in the embodiment of the present application, please refer to the description of the embodiments of the extrusion device 1, freeze-drying device 2, hardening device 4 and slitting device 3 in the embodiment of the present application for understanding.

[0224] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0225] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A method for producing an aerosol-generating substrate, characterized in that: include: The mixed material is extruded at room temperature to form an extruded matrix, wherein the mixed material is a component of the aerosol generating matrix; The extruded matrix was freeze-dried.

2. The manufacturing method according to claim 1, characterized in that: After the mixed material is extruded at room temperature to form an extruded matrix, the manufacturing method comprises: The extruded matrix is ​​slit to a set length.

3. The manufacturing method according to claim 2, characterized in that: The manufacturing method comprises: After the mixed material is extruded at room temperature to form an extruded matrix, the extruded matrix is ​​pre-cut to a preset length; After freeze-drying the extruded matrix of a predetermined length, the extruded matrix is ​​cut into the predetermined length.

4. The manufacturing method according to claim 1, characterized in that: Prior to freeze-drying the extruded matrix, the manufacturing method comprises: The extruded matrix is ​​subjected to a cooling and hardening process.

5. The manufacturing method according to claim 1, characterized in that: The extrusion temperature of the room temperature extrusion is between 35°C and 70°C; and / or, The extrusion pressure of the room temperature extrusion is between 0.5 bar and 300 bar.

6. The manufacturing method according to claim 1, characterized in that: The extrusion pressure of the room temperature extrusion is between 20 bar and 80 bar.

7. The manufacturing method according to claim 1, characterized in that: The extruded matrix is ​​extruded in a horizontal direction; or, The extruded matrix is ​​extruded in a vertical direction relative to a horizontal direction.

8. The manufacturing method according to claim 1, characterized in that: The freeze drying comprises a freezing stage and a sublimation stage after the freezing stage, wherein the moisture in the extruded matrix is ​​frozen into ice crystals in the freezing stage, and the ice crystals in the extruded matrix are sublimated in the sublimation stage, wherein the temperature of the extruded matrix in the sublimation stage is higher than the temperature of the extruded matrix in the freezing stage.

9. The manufacturing method according to claim 8, characterized in that: The temperature of the extruded matrix during the freezing stage is between -100°C and -30°C.

10. The manufacturing method according to claim 8, characterized in that: The temperature of the extruded matrix during the sublimation stage is greater than -100°C and less than -30°C.

11. The manufacturing method according to claim 8, characterized in that: The absolute vacuum degree of the ambient pressure in the sublimation stage is 1 Pa to 40 Pa; and / or the ambient temperature in the sublimation stage is 10° C. to 60° C. higher than the temperature of the extruded matrix.

12. The manufacturing method according to claim 8, characterized in that: After the sublimation stage, the freeze drying comprises a desorption stage in which the bound water in the extruded matrix evaporates.

13. The manufacturing method according to claim 12, characterized in that: The absolute vacuum degree of the ambient pressure in the desorption stage is 1 Pa to 40 Pa; and / or the temperature of the extruded matrix in the desorption stage is 0° C. to 50° C.

14. The manufacturing method according to claim 12, characterized in that: The ambient temperature of the desorption stage is 0°C to 5°C higher than the temperature of the extruded matrix.

15. The manufacturing method according to claim 8, characterized in that: Prior to the freezing stage, the freeze drying comprises a pre-freezing stage, in which the temperature of the extruded matrix is ​​reduced so that the temperature of the extruded matrix reaches -30°C to 0°C.

16. The manufacturing method according to claim 1, characterized in that: The freeze-drying environment temperature is -70°C to 50°C.

17. The manufacturing method according to claim 1, characterized in that: The moisture content of the extruded matrix after drying is 3% to 20%.

18. The manufacturing method according to claim 1, characterized in that: The mixture comprises, based on 100 parts by weight, 30 to 90 parts of plant raw materials, 1 to 15 parts of auxiliary raw materials, 5 to 30 parts of smoke-generating agent raw materials, 1 to 10 parts of adhesive raw materials, and 1 to 15 parts of flavor raw materials.

19. A system for manufacturing an aerosol-generating substrate, characterized in that: The manufacturing system comprises: An extrusion device, wherein the extrusion device is used to extrude the mixed material at room temperature to form an extrusion matrix; A freeze drying device is provided, wherein the freeze drying device is used to freeze dry the extruded matrix.

20. The manufacturing system according to claim 19, characterized in that The extrusion device comprises a bottom die and a mouth die, and the mixed material is extruded from the mouth die to form the extruded matrix; One mouth mold is arranged on a single bottom mold; or a plurality of mouth molds are arranged on a single bottom mold.

21. The manufacturing system according to claim 20, characterized in that The number of the bottom dies is multiple, and the extrusion equipment includes an adapter, and the multiple bottom dies are arranged on the adapter.

22. The manufacturing system according to claim 19, characterized in that The freeze-drying equipment comprises a box, a vacuum pump, a refrigeration system, a partition and a material tray. At least one partition is arranged in the box, the material tray is placed on the partition, and the material tray is used to hold the extruded matrix. The vacuum pump is used to control the vacuum degree in the box, and the refrigeration system adjusts the temperature of the partition to provide heat for drying the extruded matrix.

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