Preparation method of loading piece and aerosol generating product containing loading piece

Abstract

The present invention relates to a preparation method of a loading piece and an aerosol generating product containing the loading piece, the aerosol generating product comprises a composite cigarette core segment, the composite cigarette core segment comprises an aerosol generating matrix and the loading piece rolled together, the loading piece comprises a substrate, the substrate carries a loading substance, and the heat release temperature of the loading substance is lower than the pyrolysis temperature of the substrate; the preparation method comprises: S1, weighing raw materials; S2, preparing an initial slurry; S3, preparing a mixed slurry; and S4, preparing the loading piece. The present invention effectively reduces the amount of impurities and mixed gases in the aerosol generated by the composite cigarette core, improves the release efficiency of the aerosol generator, and is conducive to the increase of the amount of aerosol generated. At the same time, the preparation method is simple and feasible, the production cost is low, and large-scale production can be achieved.

Description

A method for preparing a carrier and an aerosol generating product comprising the carrier Technical Field

[0001] The present invention relates to the field of heat-not-burn technology, and in particular to a method for preparing a carrier and an aerosol-generating product comprising the carrier. Background Art

[0002] In the heat-not-burn (HNB) industry, aerosol-generating products are mostly wrapped in wrapping paper, the main components of which include calcium carbonate, cellulose, lignin, and hemicellulose. Currently, aerosol-generating products on the market use both circumferential heating and bottom heating. Since the core section of aerosol-generating products generally operates at higher temperatures, when the heat source is positioned circumferentially or at the bottom of the core section, heat is transferred through the wrapping paper to the aerosol-generating matrix within it. Consequently, the heat is inevitably partially absorbed by the wrapping paper, preventing it from being effectively used to generate aerosols. This can even lead to severe pyrolysis of the hemicellulose or cellulose in the wrapping paper, releasing large amounts of impurities and gases. This results in the generated aerosol being mixed with impurities and gases, resulting in a poor sensory experience for consumers. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a carrier and an aerosol generating product comprising the carrier.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an aerosol generating product, including a composite cigarette core segment, the composite cigarette core segment includes an aerosol generating matrix and a load member rolled together, the load member includes a substrate, the substrate carries a load substance, and the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate.

[0005] Preferably, the substrate is in sheet form, the substrate is rolled into a tube shape, and the aerosol generating matrix is ​​filled in the area surrounded by the tube-shaped substrate.

[0006] Preferably, the substrate is in sheet form, the substrate is integrally wound into a spiral tube, and the aerosol generating matrix is ​​filled in the area surrounded by the tubular substrate.

[0007] Preferably, the substrate is in sheet form, a plurality of substrates are sequentially connected to form a tube, and the aerosol generating matrix is ​​filled in the area surrounded by the tube-shaped substrate.

[0008] Preferably, the substrate is in sheet form, the aerosol generating matrix is ​​in sheet form, the surface of the aerosol generating matrix and / or the supporting element has textures, the supporting element and the aerosol generating matrix are wound together, and the textures form ventilation spaces.

[0009] Preferably, the substrate is in sheet form, and the aerosol generating matrix and the substrate are randomly mixed to form a tube shape.

[0010] Preferably, the loading substance comprises glycerol and / or propylene glycol.

[0011] Preferably, the composite cigarette core segment further comprises wrapping paper, which is wrapped around the outside of the aerosol generating substrate and the carrier that are rolled together.

[0012] A method for preparing a carrier member for an aerosol generating article comprises the following steps:

[0013] S1. Weigh the raw materials: 25-46 parts of plant fiber, 2-6 parts of adhesive, 20-50 parts of aerosol generator, 10-40 parts of thermal conductive filler, and 0.23-0.47 parts of preparation aids, including 0.15-0.25 parts of dry strength agent, 0.05-0.15 parts of wet strength agent, and 0.03-0.07 parts of retention aid;

[0014] The plant fiber comprises at least one of wood pulp fiber, straw pulp fiber and hemp pulp fiber, the binder comprises at least one of cellulose derivatives, sodium alginate, starch, pectin, guar gum, gum, chitosan, dextran, carrageenan and calcium carbonate, and the aerosol generator comprises glycerol and / or propylene glycol;

[0015] The thermally conductive filler includes at least one of a metal filler, a ceramic filler and a carbon-based material; the metal filler includes at least one of Al, Cu, Ag and Au; the ceramic filler includes at least one of Al2O3, MgO, BN and Si3N4; the carbon-based material includes at least one of graphite, graphene, reduced graphene oxide, carbon nanotubes, carbon fiber and diamond;

[0016] The dry strength agent is anionic amphoteric polyacrylamide, the wet strength agent is polyamide epichlorohydrin resin, and the retention aid is cationic polyacrylamide;

[0017] S2. Preparing an initial slurry: pre-treating the plant fiber, then beating the plant fiber with water and regularly measuring the beating degree to obtain an initial slurry;

[0018] S3. Preparing a mixed slurry: adding a thermally conductive filler to the slurry, mixing and deflocculanting the fibers, adding a dry strength agent and stirring for the first time, adding an aerosol generator, a binder, and a wet strength agent and stirring for the second time, and adding a retention aid and stirring for the third time to obtain a mixed slurry;

[0019] S4. Prepare a load member: Sheet the mixed slurry, press and dry it to obtain a substrate, and make the substrate carry the load substance, which is then dried to obtain a load member. The content of the aerosol generating agent in the load member is 20-50 wt%.

[0020] Preferably, in step S2, the plant fiber is soaked in 3-7 L of water for 3-7 h, and then 15-20 L of water is added for beating until the beating degree of the slurry is 30-38° SR;

[0021] In step S3, the rotation speed of the fiber decomposition is 8000-15000r; the first stirring is stirring at 500-1500 rpm for 3-7 min, the second stirring is stirring at 300-1000 rpm for 3-7 min, and the third stirring is stirring at 300-1000 rpm for 3-7 min;

[0022] In step S4, the mixed slurry is sheeted and pressed at a pressure of 300-500 kPa for 2-4 minutes, followed by drying at 30-50°C for 4-6 hours to obtain a substrate; the substrate is loaded with a load material solution containing 1-3 wt% of a thickener, dried at room temperature for 1.5-2.5 hours, and finally dried at 30-50°C for 10-14 hours to obtain a loaded part;

[0023] The loading substance includes glycerol and / or propylene glycol; the binder and the thickener both include nanocellulose, and the diameter of the nanocellulose is 30-40 nm and the weight average length is 1.8-2.5 mm.

[0024] The implementation of the present invention has the following beneficial effects:

[0025] The aerosol-generating product of the present invention includes a composite cigarette core segment, which includes an aerosol-generating matrix and a carrier member rolled together. The carrier member includes a substrate, the substrate carries a load substance, and the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate. When the composite cigarette core segment is heated, the aerosol-generating matrix releases the matrix substance when heated, and the load substance carried on the substrate is also released when heated, and the two are mixed to form an aerosol that can be used for inhalation. Among them, the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate. During the heating process, the load substance is released before the substrate, so that the substrate does not reach its pyrolysis temperature or the time it takes for the substrate to reach the pyrolysis temperature is delayed, thereby reducing or avoiding the mixing of impurities and miscellaneous gases generated by the pyrolysis of the substrate with the released matrix substance, effectively reducing the amount of impurities and miscellaneous gases in the generated aerosol.

[0026] In the method for preparing the carrier member of the aerosol-generating product of the present invention, an aerosol generator is added during the pulping process and the substrate is loaded with a load substance to obtain a carrier member having a certain aerosol generator content. This reduces impurities while improving the release efficiency of the aerosol generator, which is beneficial to increasing the amount of aerosol generated by the composite cigarette core segment, thereby improving the user's satisfaction and comfort when using the aerosol-generating matrix product. At the same time, the preparation method is simple and feasible, with low production costs, and can be produced on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] FIG1 is a schematic diagram of the cross-sectional structure of a composite cigarette core segment according to Example 1-1 of the present invention;

[0029] FIG2 is a schematic diagram of the cross-sectional structure of the composite cigarette core segment of Example 1-2 of the present invention;

[0030] FIG3 is a schematic diagram of the cross-sectional structure of the composite cigarette core segment of Examples 1-3 of the present invention;

[0031] FIG4 is a schematic diagram of the cross-sectional structure of the composite cigarette core segment of Examples 1-4 of the present invention;

[0032] FIG5 is a schematic diagram of the cross-sectional structure of the composite cigarette core segment of Examples 1-5 of the present invention;

[0033] FIG6 is a schematic diagram of the cross-sectional structure of the composite cigarette core segment of Examples 1-6 of the present invention;

[0034] FIG7 is a schematic diagram of the cross-sectional structure of a composite cigarette core segment according to some embodiments of the present invention;

[0035] FIG8 is a schematic diagram of the longitudinal cross-sectional structure of the composite cigarette core segment shown in FIG7 . DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0037] Example 1, an aerosol-generating article, includes a composite cigarette core segment, as shown in Figures 1 to 8 . The composite cigarette core segment comprises an aerosol-generating matrix and a carrier member rolled together. The carrier member comprises a substrate carrying a load substance. The load substance has a thermal release temperature lower than the pyrolysis temperature of the substrate, thereby releasing the load substance before the substrate is heated, thus preventing pyrolysis of the substrate. The substrate carries the load substance, and methods of loading include, but are not limited to, coating and impregnation. In some embodiments, the load substance comprises glycerol and / or propylene glycol.

[0038] In some embodiments, the substrate is in sheet form, the substrate is integrally wound into a tubular shape, and the aerosol-generating matrix is ​​filled in the area surrounded by the tubular substrate. Specifically, the carrier is arranged on the periphery of the aerosol-generating matrix, and the arrangement can be attached, and the carrier is wound around the aerosol-generating matrix, and the number of winding layers is 1-4 layers; or, the substrate is in sheet form, the substrate is integrally wound into a spiral tube, and the aerosol-generating matrix is ​​filled in the area surrounded by the tubular substrate. Specifically, the aerosol-generating matrix is ​​laid on the inner wall and / or outer wall of the carrier, and the aerosol-generating matrix is ​​pre-fixed on at least one side of the carrier, and the carrier itself is wound into a spiral tube; or, the substrate is in sheet form, multiple substrates are sequentially connected to form a tube, and the aerosol-generating matrix is ​​filled in the area surrounded by the tubular substrate.

[0039] In some embodiments, the substrate is in sheet form, and the aerosol-generating substrate and the substrate are randomly mixed to form a tubular shape. As shown in Figures 7 and 8 , a composite cigarette core segment of an aerosol-generating article includes a carrier member 71, an aerosol-generating substrate 72, and a wrapping paper 73. The aerosol-generating substrate 72 is in at least one of a filamentous, granular, or powdered form. The carrier member 71 and the aerosol-generating substrate 72 are randomly mixed to form a tubular shape, and the wrapping paper 73 is disposed around the aerosol-generating substrate 72, thereby forming a tubular composite cigarette core segment.

[0040] The aerosol-generating matrix is ​​in at least one of filamentous, granular, flaky, or powdered form. Correspondingly, the aerosol-generating matrix includes at least one of shredded tobacco, cut stems, expanded cut tobacco, expanded cut stems, tobacco granules, tobacco flakes, and tobacco powder. When the aerosol-generating matrix is ​​applied to the support member, the arrangement and density of the aerosol-generating matrix on the support member can be selected based on actual needs and are not limited by the present invention. In particular, when the aerosol-generating matrix is ​​in the form of a sheet, it may have a discontinuous structure, i.e., the aerosol-generating matrix may include a plurality of spaced-apart tobacco flakes, or may have a hollow structure. In short, it is preferred that the aerosol-generating matrix does not completely cover the support member to ensure the overall air permeability of the composite cigarette core segment.

[0041] In some embodiments, the substrate is in sheet form, the aerosol-generating substrate is in sheet form, and the surface of the aerosol-generating substrate and / or the support member is textured. The support member and the aerosol-generating substrate are intertwined, and the texture forms ventilation spaces. The aerosol-generating substrate and / or the support member are textured using a deep embossing machine or a refractive embossing machine, with the embossing depth ranging from 0.2 to 0.8 mm. The air permeability of the embossed aerosol-generating substrate is 0 to 100 CU, and the air permeability of the embossed support member is 0 to 20 CU, and the air permeability of the aerosol-generating substrate and the support member is different from zero.

[0042] In other embodiments, the composite cigarette core segment further includes wrapping paper, which is wrapped around the outside of the aerosol generating matrix and the carrier member rolled together. Specifically, the wrapping paper is arranged on the periphery of the carrier member or the aerosol generating matrix, and the arrangement can be by attachment.

[0043] In some embodiments, the aforementioned aerosol-generating article comprises a composite cigarette core segment, a cooling segment, and a filter segment, arranged axially in sequence. The composite cigarette core segment may have shapes including, but not limited to, cylindrical and block-shaped. The cooling segment is located between the composite cigarette core segment and the filter segment. The composite cigarette core segment is heated to generate aerosol. The generated high-temperature aerosol flows through the cooling segment, where it is cooled to a certain degree, before being absorbed by the user through the filter segment.

[0044] Understandably, in the present invention, when the composite cigarette core segment is heated, the aerosol-generating matrix releases the matrix material. The load material carried by the substrate is also released upon heating, and the two mix to form an aerosol that can be inhaled. The load material's thermal release temperature is lower than the substrate's pyrolysis temperature. During the heating process, the load material is released before the substrate, preventing the substrate from reaching its pyrolysis temperature or delaying its reaching temperature. This reduces or prevents the mixing of impurities and gases generated by the pyrolysis of the substrate with the released matrix material, effectively reducing the amount of impurities and gases in the generated aerosol. Furthermore, when the load material includes glycerol and / or propylene glycol, the amount of aerosol generated can be increased, thereby improving the user's inhalation experience.

[0045] The following is a detailed description through specific embodiments:

[0046] Example 1-1, an aerosol-generating product, includes a composite cigarette core segment, as shown in Figure 1. The composite cigarette core segment includes a carrier 11 and an aerosol-generating matrix 12. The carrier 11 includes a substrate, the substrate carries a load substance, and the thermal release temperature of the load substance is lower than the pyrolysis temperature of the substrate. The aerosol-generating matrix 12 is at least one of filamentous, granular, flaky or powdery, and the carrier 11 is arranged on the periphery of the aerosol-generating matrix 12, thereby forming a composite cigarette core segment. In this case, since the load substance is released before the substrate is heated, the substrate does not reach its pyrolysis temperature, thereby avoiding the generation of impurities and miscellaneous gases by the pyrolysis of the substrate. At the same time, since the substrate carries the load substance, when the composite cigarette core segment is heated, both the aerosol-generating matrix 12 and the carrier 11 can release the precursor components of the aerosol, thereby improving the aerosol release efficiency.

[0047] In Example 1-2, an aerosol-generating product includes a composite cigarette core segment. As shown in FIG2 , the composite cigarette core segment includes a carrier 21, an aerosol-generating matrix 22, and a wrapping paper 23. The carrier 21 includes a substrate, the substrate carries a load substance, and the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate. The aerosol-generating matrix 22 is in at least one of a filamentous, granular, flaky, or powdered form. The carrier 21 is disposed on the periphery of the aerosol-generating matrix 22, and the wrapping paper 23 is disposed on the periphery of the carrier 21, thereby forming a composite cigarette core segment. The carrier 21 is wound around the periphery of the aerosol-generating matrix 22 to accommodate the aerosol-generating matrix 22, and the number of winding layers is 1-4, preferably 2 layers. In this case, the carrier 21 is disposed between the wrapping paper 23 and the aerosol-generating matrix 22. Since the load substance on the carrier 21 is released by heat before the substrate and wrapping paper 23, the problem of the wrapping paper being susceptible to pyrolysis is solved, and the pyrolysis of the substrate and wrapping paper to produce impurities and miscellaneous gases is avoided. In other embodiments, an aerosol generating matrix is ​​further provided between the wrapping paper 23 and the supporting member 21 to increase the aerosol generating agent content of the composite cigarette core segment, which is beneficial to increasing the amount of aerosol released and reducing impurities and miscellaneous gases in the aerosol.

[0048] Examples 1-3 describe an aerosol-generating article comprising a composite cigarette core segment. As shown in Figure 3, the composite cigarette core segment comprises a carrier member 31, an aerosol-generating matrix 32, and a wrapping paper 33. The carrier member 31 comprises a substrate, which carries a load substance, and the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate. The aerosol-generating matrix 32 is in at least one of a filamentous, granular, flaky, or powdered form. The carrier member 31 and the aerosol-generating matrix 32 are wound together, with the carrier member 31 applied to the outer wall of the aerosol-generating matrix 32, and the wrapping paper 33 disposed around the outer periphery of the carrier member 31, thereby forming the composite cigarette core segment. The aerosol-generating matrix 32 is pre-fixed to at least one side of the carrier member 31, i.e., to either side (i.e., the inner or outer wall) or both sides of the carrier member 31, and the fixing method includes, but is not limited to, adhesion. In this embodiment, the aerosol-generating substrate 32 is fixed to one side of the carrier 31. The carrier 31 is wound around itself, alternating with the aerosol-generating substrate 32, so that the outer wall of the carrier 31 is in contact with the wrapping paper 33. In some embodiments, the composite cigarette core segment may be cylindrical in shape.

[0049] Examples 1-4, an aerosol-generating article, includes a composite cigarette core segment. As shown in Figure 4, the composite cigarette core segment includes a carrier member 41, an aerosol-generating matrix 42, and a wrapping paper 43. The carrier member 41 includes a substrate, which carries a load material, and the heat release temperature of the load material is lower than the pyrolysis temperature of the substrate. The aerosol-generating matrix 42 is in at least one of a filamentous, granular, flaky, or powdered form. The carrier member 41 and the aerosol-generating matrix 42 are wound together, with the carrier member 41 applied to the inner wall of the aerosol-generating matrix 42, and the wrapping paper 43 disposed around the outer periphery of the aerosol-generating matrix 42, thereby forming the composite cigarette core segment. In this embodiment, the aerosol-generating matrix 42 is fixed to one side of the carrier member 41. The carrier member 41 is wound around itself, alternating with the aerosol-generating matrix 42, so that the outer wall of the aerosol-generating matrix 42 contacts the wrapping paper 43.

[0050] In Example 1-5, an aerosol-generating article comprises a composite cigarette core segment, as shown in Figure 5. The composite cigarette core segment comprises a support member 51, an aerosol-generating matrix 52, and a wrapping paper 53. The support member 51 comprises a substrate, which carries a load material, and the heat release temperature of the load material is lower than the pyrolysis temperature of the substrate. The aerosol-generating matrix 52 is in at least one of a filamentous, granular, flaky, or powdered form. The support member 51 and the aerosol-generating matrix 52 are wound together, with the support member 51 covering the inner and outer walls of the aerosol-generating matrix 52. The wrapping paper 53 is disposed around the outer periphery of the aerosol-generating matrix 52, thereby forming the composite cigarette core segment. In this embodiment, the aerosol-generating matrix 52 is fixed to both sides of the support member 51. The support member 51 is wound around itself, alternating with the aerosol-generating matrix 52, so that the outer wall of the aerosol-generating matrix 52 contacts the wrapping paper 53.

[0051] Example 1-6, an aerosol-generating article, includes a composite cigarette core segment. As shown in FIG6 , the composite cigarette core segment includes a carrier member 61, an aerosol-generating substrate 62, and a wrapping paper 63. The carrier member 61 includes a substrate, which carries a load material, and the heat release temperature of the load material is lower than the pyrolysis temperature of the substrate. The aerosol-generating substrate 62 is sheet-shaped, and both the aerosol-generating substrate 62 and the carrier member 61 have textured surfaces. The carrier member 61 and the aerosol-generating substrate 62 are wound together, and the textured surfaces form a ventilation space. The carrier member 61 is applied to the outer wall of the aerosol-generating substrate 62, and the wrapping paper 63 is disposed around the outer periphery of the carrier member 61, thereby forming the composite cigarette core segment. In this embodiment, the aerosol-generating substrate 62 can be a tobacco sheet. Both the aerosol-generating substrate 62 and the carrier member 61 are sheet-shaped. The aerosol-generating substrate 62 is fixed to both sides of the carrier member 61. The carrier member 61 is wound around itself, alternating with the aerosol-generating substrate 62, so that the outer wall of the carrier member 61 contacts the wrapping paper 63. In other embodiments, only the surface of the aerosol-generating substrate is textured, or only the surface of the support member is textured.

[0052] Furthermore, the aerosol-generating substrate 62 and the supporting member 61 are embossed using a deep embossing machine or a refractive embossing machine at a working pressure of 40-60t for a holding pressure of 100-200ms, with an embossing depth of 0.2-0.8mm. This creates a wrinkled surface on the surfaces of the aerosol-generating substrate 62 and the supporting member 61, increasing the gap between them and ensuring uniform distribution of the aerosol-generating substrate 62 and the supporting member 61 in the cigarette core and providing an appropriate draw resistance. Specifically, the surface textures of the aerosol-generating substrate 62 and / or the supporting member 61 include, but are not limited to, straight threads and threaded threads. The tooth width of the straight thread is between 0.8-1.2mm, and the embossing depth is between 0.4-0.6mm; the tooth width of the threaded thread is between 1.2-1.8mm, and the embossing depth is between 0.2-0.4mm. It is understandable that the specific process conditions of the embossing treatment (including embossing pressure, embossing time, embossing shape, embossing size, etc.) can be selected according to actual needs, and the present invention is not limited thereto, and it is sufficient to apply the present invention.

[0053] The aerosol-generating matrix 62 and the support element 61 can be either dense or non-dense. The density of the sheet can be adjusted in three ways: First, by adjusting the plant fiber composition used in pulping. For the support element, replacing longer coniferous wood fibers with short glass fibers or hardwood fibers during pulping can improve air permeability. Second, by adjusting the production process. For the aerosol-generating matrix 62, the air permeability of tobacco sheets produced by the dry papermaking method is much greater than that of sheets produced by the thick pulp method, wet papermaking method, and roller-pressed method. For the support element 61, reducing the beating degree during pulping can also improve air permeability. Third, by using post-processing techniques on the sheet, such as embossing, stretching, or shearing, the fibers in the sheet are separated, introducing voids, and significantly improving its air permeability.

[0054] In this embodiment, the embossed aerosol-generating substrate 62 has an air permeability of 0 to 100 CU, while the embossed carrier member 61 has an air permeability of 0 to 20 CU. The air permeabilities of both the aerosol-generating substrate 62 and the carrier member 61 are not simultaneously 0. This ensures that both the aerosol-generating substrate and the carrier member have appropriate air permeabilities, facilitating smoke flow within the composite cigarette core segment. Aerosol-generating substrates 62 and carrier members 61 with different air permeabilities can accommodate different air inlet directions when used in heat-not-burn (HNB) aerosol-generating products. For dense sheets, this air inlet direction can be bottom-oriented, while for non-dense sheets, the air inlet direction can be bottom-oriented or circumferential. These different air inlet methods facilitate adaptation to different types of heaters.

[0055] Example 2, a method for preparing a carrier member in a composite core segment of the aerosol generating article, comprising the following steps:

[0056] S1. Weigh the raw materials: 25-46 parts of plant fiber, 2-6 parts of adhesive, 20-50 parts of aerosol generator, 10-40 parts of thermal conductive filler and 0.23-0.47 parts of preparation aids, including 0.15-0.25 parts of dry strength agent, 0.05-0.15 parts of wet strength agent and 0.03-0.07 parts of retention aid.

[0057] Plant fibers include at least one of wood pulp fibers, straw pulp fibers and hemp pulp fibers. The sources of plant fibers include but are not limited to wood, grass, cotton, tobacco, algae or other plants. The sources of wood pulp fibers include but are not limited to coniferous wood pulp and broadleaf wood pulp. The sources of straw pulp fibers include but are not limited to rice straw and sedge. The sources of hemp pulp fibers include but are not limited to hemp, flax and sisal.

[0058] The binder includes at least one of cellulose derivatives, sodium alginate, starch, pectin, guar gum, gum, chitosan, dextran, carrageenan, and calcium carbonate, wherein the cellulose derivative includes carboxymethyl cellulose (CMC) and nanocellulose, and the nanocellulose includes nanofibrillated cellulose and micro-nanocellulose.

[0059] Aerosol generating agents include glycerol and / or propylene glycol.

[0060] The thermally conductive filler includes at least one of a metal filler, a ceramic filler and a carbon-based material, wherein the metal filler includes at least one of Al, Cu, Ag and Au; the ceramic filler includes at least one of Al2O3, MgO, BN and Si3N4; and the carbon-based material includes at least one of graphite, graphene, reduced graphene oxide, carbon nanotubes, carbon fiber and diamond.

[0061] In the preparation of auxiliary agents, the dry strength agent is anionic amphoteric polyacrylamide, the wet strength agent is polyamide epichlorohydrin resin, and the retention agent is cationic polyacrylamide.

[0062] S2. Preparing an initial slurry: Pretreat the plant fiber, then add water to beat the slurry and periodically measure the beating degree to obtain an initial slurry. Specifically, soak the plant fiber in 3-7 L of water for 3-7 hours, then add 15-20 L of water (at room temperature) and beat the slurry until the beating degree reaches 30-38° SR.

[0063] S3. Preparing a mixed slurry: Add a thermally conductive filler to the slurry, mix, and deflate the fibers. Then, add a dry strength agent and stir for the first time. Then, add an aerosol generator, a binder, and a wet strength agent and stir for the second time. Finally, add a retention agent and stir for the third time to obtain a mixed slurry. Specifically, the speed for deflation is 8,000-15,000 rpm. The first stirring period is 3-7 minutes at 500-1,500 rpm, the second stirring period is 3-7 minutes at 300-1,000 rpm, and the third stirring period is 3-7 minutes at 300-1,000 rpm.

[0064] S4. Preparation of a load member: The mixed slurry is sheeted, pressed and dried to obtain a substrate, and the substrate is loaded with a load substance, which is then dried to obtain a load member, wherein the content of the aerosol generator in the load member is 20-50wt%. By loading the substrate with a load substance, the load substance includes glycerol and / or propylene glycol, and the loading method includes but is not limited to coating, impregnation, etc., a load member with a certain aerosol generator content is obtained. The aerosol generator content refers to the content of glycerol and / or propylene glycol, which in the present invention actually includes the content of the aerosol generator added in step S3 and the load substance added in step S4. In some embodiments, the composition of the load substance and the aerosol generator is consistent.

[0065] Specifically, in step S4, the mixed slurry is sheeted and pressed at a pressure of 300-500 kPa for 2-4 minutes, followed by a primary drying process at 30-50°C for 4-6 hours to obtain a substrate. The substrate is then loaded with a loading substance solution containing 1-3 wt% of a thickener, and a secondary drying process is performed at room temperature for 1.5-2.5 hours. Finally, a tertiary drying process is performed at 30-50°C for 10-14 hours to obtain a loaded component. The content of the aerosol generating agent in the loaded component can be 20-50 wt%, which is not specifically limited in the present invention.

[0066] There are two ways to add the aerosol generator (glycerol / propylene glycol) to the carrier: the first is to add it during the pulping process, and the second is to add it on the substrate. The second addition method refers to the wetting of glycerol / propylene glycol on the surface of the substrate, such as coating, dipping, etc. In some embodiments, a coating addition method is adopted, and a load material solution (glycerol emulsion / propylene glycol solution) containing 1-3wt% thickener is coated on the surface of the substrate. The coating can be single-sided coating or double-sided coating, and the coating amount is 10-40g / m 2 The coating speed is 1-5 m / min. The present invention adopts a combination of two adding methods, adding an aerosol generator (glycerol / propylene glycol) during the pulping process to prepare a substrate, and making the substrate carry the load substance (glycerol / propylene glycol).

[0067] In some embodiments, both the binder and the thickener include nanocellulose, and the nanocellulose has a diameter of 30-40 nm and a weight-average length of 1.8-2.5 mm. The thickener may also be other cellulose-based thickeners.

[0068] In the preparation method of the carrier of the present invention, plant fibers constitute the main components of the carrier, and the adhesive bonds the fibers to form the carrier during the molding process. The aerosol generator is added into the slurry and added to the load to ensure that the carrier can release the precursor components of the aerosol under the action of heat. The addition of thermally conductive fillers improves the thermal conductivity of the carrier, so that the heat from the heater is transferred to the aerosol generator substance more quickly, which is beneficial to reducing impurities and miscellaneous gases in the generated aerosol and reducing production costs.

[0069] The above-mentioned preparation method was used to prepare the load members of Examples 2-1 to 2-7. The specific process parameters are shown in Tables 1 to 3, wherein the raw materials of the load members and their mass fractions are shown in Table 1; the process parameters for preparing the initial slurry and the mixed slurry in steps S2 and S3 of the preparation method are shown in Table 2, and the process parameters for preparing the load member in step S4 are shown in Table 3.

[0070]

[0071]

[0072]

[0073] According to the TG (thermogravimetric analysis) test, the glycerol content of the support member of Example 2-1 is 21.5 wt %, and the glycerol content of the support member of Example 2-2 is 47.2 wt %.

[0074] Comparative test:

[0075] The load members of Examples 2-1 and 2-2 were respectively combined with an aerosol-generating matrix to produce cigarette core segment samples, the structure of which was the same as the composite cigarette core segment of the aerosol-generating product of Example 1-1. The release rate of the aerosol-generating matrix of the cigarette core segment samples when heated was tested.

[0076] Experimental Example 1: The carrier member of Example 2-1 was used to wrap an aerosol-generating matrix to produce a cylindrical cigarette core segment sample 1 with a height of 12 mm and a diameter of less than 8 mm. The aerosol-generating matrix was composed of multiple longitudinally arranged thick slurry sheets containing 20 wt% glycerol and 2 wt% nicotine. The carrier member had dimensions of 25 mm * 12 mm * 0.13 mm and a density of 0.677 g / cm 3 The size of the thick slurry sheet is 1mm*12mm*0.2mm, and the density is 1.020g / cm 3 , the total number is 120.

[0077] Experimental Example 2: The carrier member of Example 2-2 was used to wrap the aerosol-generating matrix to produce a cylindrical cigarette core segment sample 2 with a height of 12 mm and a diameter of less than 8 mm. The aerosol-generating matrix was a plurality of longitudinally arranged thick slurry sheets containing 20 wt% glycerol and 2 wt% nicotine. The dimensions of the carrier member were 25 mm * 12 mm * 0.13 mm, and the density was 0.677 g / cm 3 The size of the thick slurry sheet is 1mm*12mm*0.2mm, and the density is 1.020g / cm 3 , the total number is 120.

[0078] Comparative Example: The aerosol generating matrix was combined to form a cylindrical cigarette core segment sample 3 with a height of 12 mm and a diameter of less than 8 mm. The aerosol generating matrix was a plurality of thick pulp sheets containing 20 wt% glycerol and 2 wt% nicotine arranged longitudinally. The size of the thick pulp sheet was 1 mm*12 mm*0.2 mm, and the density was 1.020 g / cm 3 , the total number is 120.

[0079] Test equipment: Gas chromatography furnace

[0080] Test method:

[0081] (1) Set the temperature to 330°C, and place the cigarette core samples of Experimental Example 1, Experimental Example 2, and the comparative example into the sample tube for circumferential heating to completely release the glycerin and nicotine in the sample. Detect the glycerin and nicotine content in the smoke, and use the value as the total value of the glycerin and nicotine content in the sample. Repeat the test 5 times for each sample, and use the average value of the test results as the total value of the nicotine or glycerin content in the sample. Tm .

[0082] (2) Adjust the temperature to 280℃ and test the cigarette core segment samples using the above method. The average value of the test results is used as the nicotine or glycerin content release value A in the tested samples. Td .

[0083] (3) Calculate the release efficiency of glycerin and nicotine of the cigarette core segment samples of Experimental Example 1, Experimental Example 2 and the comparative example using the following formula: The test results are shown in Table 4.

[0084]

[0085] Table 4 shows that the cigarette core segment samples (Experimental Examples 1-2) made with the support member of the present invention, under the same heating conditions (280°C, circumferential heating), achieved higher glycerin and nicotine release efficiencies. Compared to the sample without the support member (Comparative Example), the glycerin and nicotine release efficiencies were both below 70%. Specifically, the sample made with the support member of Example 2-2, which had a higher glycerin content, achieved a glycerin release efficiency exceeding 75%, and a nicotine release efficiency exceeding 80%. This indicates that the support member, which first contacts the heat source, has a crucial influence on the release efficiency of the aerosol-generating substrate. Designing the outer layer of the cigarette core with a support member containing a high glycerin content significantly improves the release efficiency of the aerosol-generating substrate for the entire cigarette core.

[0086] The mechanism of aerosol formation is that after the aerosol-forming matrix is ​​heated, volatile components such as glycerin and nicotine are released to form vapor. This vapor is then cooled during the puffing process, and due to the nucleation mechanism, the vapor condenses into droplets. When the temperature is low enough and the droplets are numerous enough, they coalesce to form large aerosol droplets. Since glycerin is a precursor in the aerosol formation process, vaporous glycerin molecules first condense into liquid near its saturation temperature (290°C at atmospheric pressure). Nicotine and other substances then adsorb onto the droplets and become part of the aerosol. Therefore, the glycerin content directly determines the number of aerosol droplets. When the number of aerosol droplets is high enough, the absorption of other substances in the mixed vapor is more pronounced, thereby reducing the vapor concentration of the corresponding components and promoting their release from the aerosol-forming matrix. Therefore, if the aerosol-forming matrix, located close to the heat source, is designed to carry a significant amount of glycerin, the problems of low heated smoke volume and insufficient satisfaction can be addressed at the source.

[0087] There are two common heating methods for aerosol-generating substrates: circumferential heating and combined bottom and circumferential heating. For combined bottom and circumferential heating, the temperature in the bottom direction represents the highest temperature zone, while the temperature in the circumferential direction represents the second highest temperature zone. In this case, when an aerosol-generating substrate with a high glycerin loading (such as the carrier of the present invention) is placed in the circumferential direction, it facilitates the immediate release of glycerin, rapidly increasing the proportion of glycerin molecules in the vapor and significantly promoting the release of substances such as nicotine and glycerin from the cigarette core, thereby increasing the amount of smoke produced and the user's satisfaction during inhalation. For circumferential heating, the temperature in the circumferential direction represents the highest temperature zone, and the temperature field subsequently expands into the interior of the aerosol-generating substrate. In this case, when heated to approximately 300°C, the wrapping paper undergoes pyrolysis of its internal cellulose, hemicellulose, lignin, and other substances (referred to as non-smoking substances in this invention). This results in the release of impurities and gases mixed in the aerosol, significantly reducing user satisfaction.

[0088] The present invention also conducted thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) on the support members of Examples 2-1 and 2-2. The results showed that the peak temperature for the release of non-smoking substances in the support member of Example 2-1 (with a glycerol content of 21.5%) was around 304.4°C, while the peak temperature for the release of non-smoking substances in the support member of Example 2-2 (with a glycerol content of 47.2%) was around 323.6°C. This indicates that increasing the glycerol content of the support member significantly increases the temperature at which the non-smoking substances are released from the support member. In particular, the release temperature in Example 2-2 was approximately 20°C higher than that in Example 2-1. Therefore, when the circumferential direction is set to an aerosol generating matrix with a high aerosol generating agent content (such as the carrier of the present invention), the carrier absorbs a portion of the heat from the circumferential direction, playing a role of "heat consumption". During the heating process, the aerosol generating agent such as glycerin is released from the carrier. The heat release temperature of glycerin is much lower than the pyrolysis temperature of the packaging paper components, thereby avoiding the pyrolysis of non-tobacco substances in the packaging paper, effectively "protecting" the packaging paper, and significantly reducing the amount of impurities and miscellaneous gases in the generated aerosol.

[0089] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating product comprising a composite cigarette core segment, characterized in that: The composite cigarette core segment comprises an aerosol generating matrix and a carrier rolled together, wherein the carrier comprises a substrate, the substrate carries a load substance, and the heat release temperature of the load substance is lower than the pyrolysis temperature of the substrate.

2. The aerosol-generating article according to claim 1, wherein The substrate is in sheet shape, the substrate is rolled into a tube shape, and the aerosol generating matrix is ​​filled in the area surrounded by the substrate in the tube shape.

3. The aerosol-generating article according to claim 1, wherein The substrate is in sheet shape, and the substrate is integrally wound into a spiral tube shape. The aerosol generating matrix is ​​filled in the area surrounded by the tubular substrate.

4. The aerosol-generating article of claim 1, wherein: The substrate is in sheet shape, and a plurality of the substrates are sequentially connected to form a tube shape, and the aerosol generating matrix is ​​filled in the area surrounded by the substrate in the tube shape.

5. The aerosol-generating article of claim 1, wherein: The substrate is in sheet shape, the aerosol generating matrix is ​​in sheet shape, the surface of the aerosol generating matrix and / or the supporting member has textures, the supporting member and the aerosol generating matrix are wound together, and the textures form ventilation spaces.

6. The aerosol-generating article of claim 1, wherein: The substrate is in a sheet shape, and the aerosol generating matrix is ​​randomly mixed with the substrate to form a tube shape.

7. The aerosol-generating article of claim 1, wherein: The loading substance includes glycerol and / or propylene glycol.

8. The aerosol-generating article of claim 1, wherein: The composite cigarette core segment further comprises a wrapping paper, which is wrapped around the outer side of the aerosol generating substrate and the carrier rolled together.

9. A method for preparing a carrier of an aerosol generating article according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1. Weigh raw materials: weigh 25-46 parts of plant fiber, 2-6 parts of adhesive, 20-50 parts of aerosol generator, 10-40 parts of thermal conductive filler and 0.23-0.47 parts of preparation aid, wherein the preparation aid includes 0.15-0.25 parts of dry strength agent, 0.05-0.15 parts of wet strength agent and 0.03-0.07 parts of retention aid; The plant fiber includes at least one of wood pulp fiber, straw pulp fiber and hemp pulp fiber, the binder includes at least one of cellulose derivatives, sodium alginate, starch, pectin, guar gum, gum, chitosan, dextran, carrageenan and calcium carbonate, and the aerosol generator includes glycerol and / or propylene glycol; The thermal conductive filler includes at least one of a metal filler, a ceramic filler and a carbon material; the metal filler includes at least one of Al, Cu, Ag and Au; the ceramic filler includes at least one of Al2O3, MgO, BN and Si3N4; the carbon material includes at least one of graphite, graphene, reduced graphene oxide, carbon nanotubes, carbon fiber and diamond; The dry strength agent is anionic amphoteric polyacrylamide, the wet strength agent is polyamide epichlorohydrin resin, and the retention agent is cationic polyacrylamide; S2. preparing an initial slurry: pretreating the plant fiber, then adding water to pulp and periodically measuring the pulping degree to obtain an initial slurry; S3, preparing a mixed slurry: adding the thermal conductive filler to the slurry, mixing and defiberizing, then adding the dry strength agent and stirring for the first time, adding the aerosol generator, the binder and the wet strength agent and stirring for the second time, then adding the retention agent and stirring for the third time to obtain a mixed slurry; S4, preparing a load member: the mixed slurry is sheeted, pressed and dried to obtain a substrate, the substrate is loaded with a load substance, and the load member is obtained after drying, wherein the content of the aerosol generating agent in the load member is 20-50wt%.

10. The method for preparing a carrier of an aerosol generating article according to claim 9, characterized in that: In the step S2, the plant fiber is soaked in 3-7L water for 3-7h, and then 15-20L water is added for pulping until the pulp has a beating degree of 30-38°SR; In the step S3, the rotation speed of the fiber decomposition is 8000-15000r; the first stirring is stirring at 500-1500rpm for 3-7min, the second stirring is stirring at 300-1000rpm for 3-7min, and the third stirring is stirring at 300-1000rpm for 3-7min; In the step S4, the mixed slurry is sheeted and pressed at a pressure of 300-500 kPa for 2-4 minutes, and then dried at 30-50° C. for 4-6 hours to obtain a substrate; the substrate is loaded with a loading substance solution containing 1-3 wt % of a thickener, and dried at room temperature for 1.5-2.5 hours, and finally dried at 30-50° C. for 10-14 hours to obtain a loading part; The load material includes glycerol and / or propylene glycol; the adhesive and the thickener both include nanocellulose, and the nanocellulose has a diameter of 30-40 nm and a weight average length of 1.8-2.5 mm.

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