Liquid guide body as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of aerosol generation, and particularly relates to a liquid guide body and a preparation method and application thereof. The liquid guide body comprises a permeation layer, a flow guide layer and a heating carrier layer which are sequentially stacked; a plurality of areas with different average apertures are distributed on the permeable layer along the plane direction, and the average apertures of two adjacent areas are different; the average pore size of pores in the flow guide layer is smaller than or equal to the average pore size of a minimum pore area in the permeable layer; the average pore size of pores in the heating carrier layer is smaller than or equal to the average pore size of pores in the diversion layer. According to the invention, the areas with different pore sizes in the liquid guide layer and the permeation layer generate a wicking effect on aerosol generation matrixes with different viscosities; through reasonable matching of the permeation layer, the flow guide layer and the heating carrier layer, the liquid guide requirements of aerosol generating matrixes with different viscosities can be met. The use scenes are diversified, the aerosol generating matrixes with different viscosities can be freely switched, liquid guiding bodies or equipment do not need to be frequently replaced, operation is easy and convenient, and flexibility and user experience are improved.

Description

Technical Field

[0001] The present application belongs to the field of aerosol generation technology, and in particular relates to a liquid conductor and a preparation method and application thereof. Background Art

[0002] An aerosol generating device typically includes a heating module and a power supply electrically connected to the heating module. The heating module includes a heating unit, a key component of the heating module. Driven by the power supply, the heating unit heats the aerosol substrate (i.e., the aerosol-generating substrate) and forms an aerosol for inhalation. The heating unit includes components such as a liquid guide and a heating element. The liquid guide is typically positioned around the heating element to transfer the aerosol-generating substrate to the heating element, which heats the aerosol substrate to generate the aerosol.

[0003] At present, it is difficult for the same specification of guide liquid to adapt to aerosol generating matrices with different viscosities in the heating module at the same time. For aerosol generating matrices with too high viscosity, the guide liquid is very likely to have problems with smooth liquid conduction, resulting in core sticking; while for aerosol generating matrices with too low viscosity, the guide liquid is likely to have problems with too fast liquid conduction, resulting in leakage or poor aerosol taste experience. Summary of the Invention

[0004] The purpose of this application is to provide a liquid guide and a preparation method thereof, as well as a heating unit, a heating module and an aerosol generating device, aiming to solve to a certain extent the problem that the existing liquid guide is difficult to simultaneously adapt to aerosol generating matrices of different viscosities.

[0005] To achieve the above application objectives, the technical solutions adopted in this application are as follows: In a first aspect, the present application provides a liquid-conducting device, comprising a permeable layer, a flow-conducting layer, and a heating carrier layer stacked in sequence; wherein: The transmission layer has a plurality of regions with different average pore sizes distributed along the plane direction, and the average pore sizes of two adjacent regions are different; The average pore size of the pores in the guide layer is less than or equal to the average pore size of the smallest pore area in the permeable layer; The average pore size of the pores in the heating carrier layer is smaller than or equal to the average pore size of the pores in the guide layer.

[0006] The first aspect of the present application provides a liquid-conducting layer, comprising a permeable layer, a flow-guiding layer and a heating carrier layer stacked in sequence; wherein, the permeable layer has a plurality of regions with different average pore sizes distributed along the plane direction, and the average pore sizes of two adjacent regions are different, so that the regions with different average pore sizes are evenly distributed in the permeable layer. Based on the fact that pores of different sizes can produce a wicking effect on liquids of different viscosities, regions with different average pore sizes in the permeable layer can have a wicking effect on aerosol-generating matrices of different viscosities. That is, regions with large pore sizes can be adapted to aerosol-generating matrices with high viscosity, and regions with small pore sizes can be adapted to aerosol-generating matrices with low viscosity. After the high-viscosity aerosol-generating matrix enters the permeable layer through the wicking effect of the large-pore area, it can also be wicked and transferred by the small-pore area within the permeable layer, ensuring that the high-viscosity aerosol-generating matrix can smoothly undergo a wicking effect in the subsequent flow-guiding layer, thereby achieving stable transmission of the high-viscosity aerosol-generating matrix. In addition, the average pore size of the pores in the guide layer is less than or equal to the average pore size of the smallest pore area in the permeable layer, so that the guide layer has a continuous wicking effect on the aerosol generating matrix in the permeable layer, which plays a role in wicking the aerosol generating matrix from the permeable layer to the guide layer. The guide layer is used to quickly capture the aerosol generating matrix that penetrates from the permeable layer, has a temporary liquid storage capacity, and can guide the aerosol generating matrix to diffuse, increase its absorption area, and play a role in reducing the direct point penetration of the aerosol generating matrix. The average pore size of the pores in the heating carrier layer is less than or equal to the average pore size of the pores in the guide layer, so that the heating carrier layer has a continuous wicking effect on the aerosol generating matrix in the guide layer, absorbs the aerosol generating matrix from the guide layer, and transports the aerosol generating matrix to the heating element for aerosolization. Therefore, the liquid guide of the present application, by setting multiple areas with different average pore sizes in the permeable layer, enables aerosol generating matrices of different viscosities, such as low viscosity aerosol generating matrix and high viscosity aerosol generating matrix, to undergo a wicking effect in the permeable layer of the liquid guide. The pore gradient design of the permeable layer, the flow-guiding layer, and the heating carrier layer, combined with the synergistic effect of each layer, enables the aerosol-generating substrate to be stably and efficiently transported and migrated within the flow-guiding body. This improves the efficiency of the flow-guiding body in penetrating the aerosol-generating substrate, guiding the flow, and transporting the aerosol, and enables the flow-guiding body to simultaneously adapt to and process aerosol-generating substrates of varying viscosities.

[0007] In some possible implementations, the permeable layer includes a plurality of adjacent first and second regions along a planar direction, and the average pore size of the two adjacent regions is different. The average pore size of the pores in the first region is larger than the average pore size of the pores in the second region; and the average pore size of the pores in the guide layer is less than or equal to the average pore size of the pores in the second region. In this case, the larger average pore size of the pores in the first region can produce a wicking effect for aerosol-forming substrates with higher viscosities, while the smaller average pore size of the pores in the second region can produce a wicking effect for aerosol-forming substrates with lower viscosities.

[0008] In some possible implementations, based on the total planar area of ​​the transparent layer being 100%, the first region accounts for 30% to 80% of the area, and the second region accounts for 20% to 70% of the area. In this case, the area proportion of the first region with a larger pore size sufficiently ensures the wicking efficiency of the transparent layer for high-viscosity aerosol-generating substrates, while the area proportion of the second region with a smaller pore size sufficiently ensures the wicking efficiency of the transparent layer for low-viscosity aerosol-generating substrates.

[0009] In some possible implementations, the average pore size of the first region is 130 μm to 300 μm. In this case, the pore size of the first region can produce a wicking effect for aerosol-forming substrates with higher viscosities, especially for aerosol-forming substrates with viscosities of 300 cp to 700 cp.

[0010] In some possible implementations, the average pore size of the second region is 50 μm to 130 μm. In this case, the pore size of the first region can produce a wicking effect for aerosol-forming substrates with lower viscosities, especially for aerosol-forming substrates with viscosities of 50 cp to 300 cp.

[0011] In some possible implementations, the average pore size of the guide layer is 40 μm to 120 μm. In this case, the pore size of the guide layer ensures wicking transfer of the aerosol-generating substrate from the permeable layer to the guide layer. The guide layer can quickly capture aerosol-generating substrate that permeates the permeable layer, provide temporary liquid storage capacity, and guide the diffusion of the aerosol-generating substrate, increasing its absorption area, thereby reducing direct point penetration of the aerosol-generating substrate.

[0012] In some possible implementations, the average pore size of the air-guiding layer is 5 μm to 30 μm smaller than the average pore size of the second region. In this case, a certain capillary force difference between the two layers is sufficiently maintained, but the difference is not so large as to cause turbulence of the aerosol-generating substrate within the fibers, thereby enabling continuous wicking and transfer of the aerosol-generating substrate from the permeable layer to the air-guiding layer.

[0013] In some possible implementations, the average pore size of the heating carrier layer is 40 μm to 100 μm. In this case, the pore size of the heating carrier layer ensures a continuous wicking effect on the aerosol-generating substrate in the guide layer, absorbing the aerosol-generating substrate from the guide layer and providing a heating element to heat and generate aerosol, while also ensuring a conversion effect of the aerosol-generating substrate.

[0014] In some possible implementations, the average pore size of the heating carrier layer is 5 μm to 30 μm smaller than the average pore size of the air guide layer. In this case, a certain capillary force difference between the two layers is sufficiently maintained, but the difference is not so large as to cause turbulence of the aerosol-generating substrate within the fibers, thereby ensuring continuous wicking transfer of the aerosol-generating substrate from the air guide layer to the heating carrier layer.

[0015] In some possible implementations, the permeable layer has a grammage of 15 gsm to 150 gsm. In this case, the grammage of the permeable layer can sufficiently balance the liquid conduction speed, liquid locking ability, and subsequent conversion effect of the aerosol-forming substrate.

[0016] In some possible implementations, the guide layer has a grammage of 20 gsm to 200 gsm. In this case, the grammage of the guide layer fully balances the liquid conduction speed, liquid locking ability, and subsequent conversion effect of the aerosol-generating substrate.

[0017] In some possible implementations, the heating carrier layer has a grammage of 30 gsm to 300 gsm. In this case, the grammage of the heating carrier layer fully balances the liquid conduction speed, liquid locking ability, and subsequent conversion effect of the aerosol-forming substrate.

[0018] In some possible implementations, the grammage of the first region is 40 gsm to 80 gsm.

[0019] In some possible implementations, the grammage of the second region is 40 gsm to 80 gsm.

[0020] In some possible implementations, the thickness of the permeable layer is 0.2 mm to 3 mm. In this case, the thickness of the permeable layer can provide a sufficient continuous channel for liquid wicking of the aerosol-forming substrate, while ensuring the permeable layer's initial transfer and wicking of the aerosol-forming substrate and its adaptability to aerosol-forming substrates of varying viscosities.

[0021] In some possible implementations, the guide layer has a thickness of 0.2 mm to 7.5 mm. In this case, the guide layer has a thickness that ensures both a guiding and penetrating effect on the aerosol-generating substrate and a temporary storage performance of the aerosol-generating substrate.

[0022] In some possible implementations, the thickness of the heating carrier layer is 0.2 mm to 4.5 mm. In this case, the thickness of the heating carrier layer is sufficient to ensure the diversion and conversion effect on the aerosol generating substrate.

[0023] In some possible implementations, the thickness of the first region is 0.2 mm to 1.8 mm.

[0024] In some possible implementations, the thickness of the second region is 0.2 mm to 1.2 mm.

[0025] In some possible implementations, the first and second regions of the permeable layer are distributed in at least one of an alternating pattern, a checkerboard pattern, a random discrete pattern, and a clumping pattern. In this case, the first and second regions are uniformly distributed, so that adjacent regions have different average pore sizes, ensuring that regions of different average pore sizes in the permeable layer can all generate a stable wicking effect for aerosol-forming substrates of varying viscosities.

[0026] In some possible implementations, the material of the permeable layer includes at least one of natural cellulose fibers, natural protein fibers, regenerated cellulose fibers, and synthetic fibers. These fibers have good wettability with the aerosol-generating substrate, facilitating a wicking effect for aerosol-generating substrates of varying viscosities in regions of different average pore sizes within the permeable layer.

[0027] In some possible implementations, the material of the guide layer includes at least one of natural cellulose fiber, natural protein fiber, regenerated cellulose fiber, and synthetic fiber. These fibers fully ensure the liquid absorption capacity of the guide layer, can quickly absorb and conduct the aerosol-forming matrix, and help ensure a balance between liquid storage and liquid conduction in the guide layer, thereby reducing leakage.

[0028] In some possible implementations, the heating carrier layer comprises at least one of natural cellulose fibers, regenerated cellulose fibers, and synthetic fibers. These fibers have high thermal stability, strong liquid absorption capacity, and excellent liquid conduction effects, thereby fully ensuring the liquid conduction and aerosol generation performance of the heating carrier layer.

[0029] In some possible implementations, the natural cellulose fiber includes at least one of cotton, hemp, coconut shell, wood pulp, and bamboo fibers. These natural cellulose fibers, with their hydroxyl (-OH) groups in the molecules, possess strong liquid absorption capacity, enabling them to quickly absorb and conduct the aerosol-forming matrix, improving aerosol generation efficiency and reducing the risk of dry burning. Furthermore, they are naturally derived, readily available raw materials, have mature processing technology, are biodegradable, conform to environmental trends, and have high user acceptance.

[0030] In some possible implementations, the natural protein fibers include at least one of wool fibers and silk fibers. These natural protein fibers have a protein structure similar to human tissue, resulting in increased safety and a lower risk of allergies. Furthermore, natural proteins may inhibit microbial growth, extending the life of the conductive liquid.

[0031] In some possible implementations, the regenerated cellulose fiber includes at least one of viscose, lyocell, modal, and cupro. These four typical regenerated cellulose fibers are all made from natural cellulose (such as wood pulp or bamboo pulp) through a chemical dissolution-regeneration process. Chemical modification balances hygroscopicity and strength, resulting in more uniform liquid conduction. Furthermore, the structure is controllable, allowing for customizable porosity, optimizing the balance between liquid retention and conduction, and reducing leakage.

[0032] In some possible implementations, the synthetic fiber includes at least one of polyethylene terephthalate (PET), polypropylene (PP), polyamide (PA), and polylactic acid (PLA). These synthetic fibers exhibit excellent heat resistance, can withstand high temperatures, and reduce the risk of carbonization. Fiber diameter and porosity can be designed to precisely control liquid conduction speed and liquid retention. Their excellent chemical stability extends the life of the liquid conduction device, and their high plasticity allows for easy processing into complex structures, adapting to various heating module designs.

[0033] In some possible implementations, the material of the heating carrier layer includes at least one specialty fiber selected from the group consisting of poly(m-phenylene-m-phthalamide) fiber, polytetrafluoroethylene fiber, polybenzimidazole fiber, and silicate-based viscose fiber. These specialty fibers have high heat resistance and uniform liquid conduction.

[0034] In a second aspect, the present application provides a method for preparing a liquid-conducting agent, comprising the following steps: preparing a transmission layer, wherein the transmission layer has a plurality of regions with different average pore sizes distributed along a plane direction, and the average pore sizes of two adjacent regions are different; preparing a guide layer, wherein the average pore size of the pores in the guide layer is less than or equal to the average pore size of the smallest pore area in the permeable layer; preparing a heating carrier layer, wherein the average pore size of the pores in the heating carrier layer is smaller than or equal to the average pore size of the pores in the guide layer; The permeable layer, the fluid-guiding layer and the heating carrier layer are stacked and combined in sequence to obtain a fluid-guiding layer.

[0035] The second aspect of the present application provides a method for preparing a liquid-conducting liquid. After separately preparing a permeable layer, a flow-guiding layer, and a heating carrier layer, the permeable layer, the flow-guiding layer, and the heating carrier layer are sequentially stacked and combined to obtain a liquid-conducting liquid. The preparation process is simple and suitable for industrial large-scale production and application. The permeable layer has multiple regions of different average pore sizes distributed along a plane, and the average pore sizes of two adjacent regions are different. The regions of different average pore sizes in the permeable layer produce a wicking effect on an aerosol-forming substrate of different viscosities. The average pore size of the pores in the flow-guiding layer is less than or equal to the average pore size of the smallest pore region in the permeable layer, so that the flow-guiding layer continuously wicks the aerosol-forming substrate in the permeable layer, thereby wicking the aerosol-forming substrate from the permeable layer to the flow-guiding layer. The average pore size of the pores in the heating carrier layer is less than or equal to the average pore size of the pores in the flow-guiding layer, so that the heating carrier layer continuously wicks the aerosol-forming substrate in the flow-guiding layer, absorbing the aerosol-forming substrate from the flow-guiding layer and transferring the aerosol-forming substrate to the heating element for conversion into an aerosol by heating. Therefore, through the synergistic cooperation of the permeable layer, the guide layer and the heating carrier layer, the guide liquid can simultaneously adapt to and process aerosol generating matrices of different viscosities, and has a good guide effect on the aerosol generating matrix, thereby fully ensuring the conversion effect of the aerosol generating matrix.

[0036] In some possible implementations, the preparation processes of the permeable layer, the guide layer, and the heating carrier layer independently include: forming the fibers into a web by dry-laying and / or wet-laying, and then reinforcing them by hydroentangling and / or needle-punching.

[0037] In some possible implementations, the step of preparing the permeable layer includes: preparing a plurality of first regions and a second region respectively, and arranging the first regions and the second regions alternately and adjacently in a plane direction to form the permeable layer, wherein the average pore size of the pores in the first region is larger than the average pore size of the pores in the second region; and the average pore size of the pores in the guide layer is less than or equal to the average pore size of the pores in the second region. In this case, the average pore size of the pores in the first region is larger, which can produce a wicking effect on the aerosol-generating matrix with a higher viscosity, while the average pore size of the pores in the second region is smaller, which can produce a wicking effect on the aerosol-generating matrix with a lower viscosity. In addition, after the high-viscosity aerosol-generating matrix enters the permeable layer through the wicking effect of the large-pore region, it can also be wicked and transferred within the permeable layer by the small-pore region, ensuring that the high-viscosity aerosol-generating matrix can smoothly undergo a wicking effect in the subsequent guide layer, thereby achieving stable transmission of the high-viscosity aerosol-generating matrix.

[0038] In some possible implementations, based on the total planar area of ​​the transparent layer being 100%, the first region accounts for 30% to 80% of the area, and the second region accounts for 20% to 70% of the area. In this case, the area proportion of the first region with a larger pore size sufficiently ensures the wicking efficiency of the transparent layer for high-viscosity aerosol-generating substrates, thereby achieving better compatibility of the transparent layer with high-viscosity aerosol-generating substrates. Conversely, the area proportion of the second region with a smaller pore size sufficiently ensures the wicking efficiency of the transparent layer for low-viscosity aerosol-generating substrates, thereby achieving better compatibility of the transparent layer with low-viscosity aerosol-generating substrates.

[0039] In some possible implementations, the average pore size of the first region is 130 μm to 300 μm; the average pore size of the second region is 50 μm to 130 μm; the average pore size of the flow-guiding layer is 40 μm to 120 μm; and the average pore size of the heating carrier layer is 40 μm to 100 μm. In this case, the guiding liquid is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0040] In some possible implementations, the thickness of the first region is 0.2 mm to 1.8 mm; the thickness of the second region is 0.2 mm to 1.2 mm; the thickness of the guide layer is 0.2 mm to 7.5 mm; and the thickness of the heating carrier layer is 0.2 mm to 4.5 mm. In this case, the guiding liquid is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0041] In some possible implementations, the first region has a grammage of 40gsm to 80gsm; the second region has a grammage of 40gsm to 80gsm; the flow-guiding layer has a grammage of 20gsm to 200gsm; and the heating carrier layer has a grammage of 30gsm to 300gsm. In this case, the guiding liquid is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0042] In a third aspect, the present application provides a heating unit comprising the above-mentioned liquid-conducting material and / or the liquid-conducting material prepared by the above-mentioned method, and a heating element.

[0043] The heating unit of the present application contains the above-mentioned guiding liquid, which can adapt to the guiding requirements of aerosol generating matrices of different viscosities, thereby diversifying the application scenarios of the heating unit. Users can freely switch aerosol generating matrices of different viscosities according to their needs, without the need to frequently replace the heating unit. The operation is simple, and the flexibility and feeling of the user experience are improved. The problem of poor guiding of high-viscosity aerosol generating matrices and leakage of low-viscosity aerosol generating matrices due to the addition of aerosol generating matrices of different viscosities during use is reduced, thereby improving the service life of the heating unit.

[0044] In a fourth aspect, the present application provides a heating module comprising a liquid storage component and the above-mentioned heating unit.

[0045] The heating module of the present application includes a liquid storage component and the aforementioned heating unit. The heating unit can adapt to the liquid conduction requirements of aerosol-generating matrices of different viscosities, and has diversified application scenarios. Users can freely switch aerosol-generating matrices of different viscosities according to their needs, without the need for frequent replacement of the heating unit. The operation is simple and the service life is long. Therefore, the user experience of the heating module is improved, the flexibility and usability are enhanced, and the service life of the heating module is also extended.

[0046] In a fifth aspect, the present application provides an aerosol generating device, comprising a power supply assembly and the above-mentioned heating module, wherein the power supply assembly is electrically connected to the heating module and is used to supply power to the heating module.

[0047] The aerosol generating device of the present application includes a power supply assembly and the aforementioned heating module. The heating unit in the heating module can adapt to the liquid guiding requirements of aerosol generating matrices of different viscosities, diversifying the application scenarios. Users can freely switch aerosol generating matrices of different viscosities according to their needs, and the device has a long service life. Therefore, the flexibility and user experience of the aerosol generating device are improved, and the service life of the aerosol generating device is also increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 Schematic diagram of the cross-sectional structure of the liquid guide provided in an embodiment of the present application; Figure 2 is a schematic diagram of the alternating distribution of the first region and the second region in the transmission layer provided in an embodiment of the present application; Figure 3 Schematic diagram of the checkerboard distribution of the first region and the second region in the transparent layer provided in an embodiment of the present application; Figure 4 Schematic diagram of random discrete distribution of first and second regions in a transmission layer provided by an embodiment of the present application; Figure 5 Schematic diagram of the cluster distribution of the first region and the second region in the transmission layer provided in an embodiment of the present application; Figure 6 1 is a flow chart of a method for preparing a conductive liquid provided in an embodiment of the present application; Figure 7 This is a schematic diagram of the cross-sectional structure of the liquid guide provided in Comparative Example 1 of the present application; Figure 8 This is a schematic diagram of the cross-sectional structure of the liquid guide provided in Comparative Example 2 of the present application; Figure 9 It is a structural schematic diagram of the aerosol generating device provided in an embodiment of the present application.

[0050] Among them, the reference numerals in the figures are: 10 - Transmission layer 11 - First region 12 - Second region 20 - Guide layer 30 - Heating carrier layer 40 - Liquid guide 50 - Heating element 60 - Heating unit 70 - Liquid storage component 80 - Heating module 90 - Power supply component 91 - Battery control component 100—Aerosol generating device. DETAILED DESCRIPTION In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0051] In this application, the term "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0052] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of a, b, or c" or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can each be single or plural.

[0053] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. Some or all of the steps can be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0054] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0055] The weights of the relevant components mentioned in the examples of this specification may not only refer to the specific content of each component, but also represent the weight ratio between the components. Therefore, as long as the content of the relevant components in the examples of this specification is proportionally increased or decreased according to the examples of this specification, it is within the scope disclosed in the examples of this specification. Specifically, the masses described in the examples of this specification may be mass units known in the chemical industry, such as μg, mg, g, and kg.

[0056] The terms "first" and "second" are used solely for descriptive purposes to distinguish objects, such as substances, from one another and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features being referred to. For example, without departing from the scope of the embodiments of this application, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features.

[0057] The term "wicking effect" refers to the phenomenon in which liquids spontaneously rise and diffuse along the fibers or pores of porous materials or fiber assemblies due to capillary action. For example, in textile materials, the cross-linked arrangement of fibers forms continuous capillary channels, through which liquids can be rapidly conducted and diffused.

[0058] From the perspective of market development, as shown in the attached Figure 9 As shown, the aerosol generating device 100 generally includes a heating module 80 and a power supply device electrically connected to the heating module 80. The heating module 80 includes a liquid storage assembly 70 and a heating unit 60. The heating unit 60 is a key component of the heating module 80 and is electrically driven by the power supply device to heat the aerosol-generating substrate to form an aerosol that can be inhaled by the user. The heating unit 60 includes components such as a liquid guide 40 and a heating element 50. The liquid guide 40 is generally disposed around the heating element 50 to transfer the aerosol-generating substrate to the heating element 50. The heating element 50 is used to heat the aerosol substrate to generate the aerosol.

[0059] Non-woven fabrics offer advantages such as high pore size consistency, adjustable pore size and material composition ratios, easy processing, and excellent aerosol mouthfeel. They are currently a key material for the "cotton wick" liquid guide 40 and are widely used in the heating module 80. However, it is currently difficult for the same specification of liquid guide 40 to simultaneously adapt to aerosol generating matrices of varying viscosities within the heating module 80. For aerosol generating matrices with excessively high viscosities, the liquid guide 40 is prone to poor liquid conduction, resulting in wick sticking. For aerosol generating matrices with excessively low viscosities, the liquid guide 40 is prone to excessively rapid liquid conduction, causing leakage or a poor aerosol mouthfeel.

[0060] The liquid-guiding effect of the guiding liquid 40 is closely related to the viscosity of the aerosol-generating matrix. To ensure the liquid-guiding effect, aerosol-generating matrices of different viscosities often need to be adapted to different guiding liquids 40. Usually, the material ratio and pore size of the guiding liquid 40 are adjusted by using one or several specific aerosol-generating matrices of fixed viscosity to achieve a balance between the taste and service life of the aerosol. However, it is still difficult for traditional guiding liquids 40 to adapt to aerosol-generating matrices of different viscosities at the same time, and it is unable to meet the penetration, diversion and conversion requirements of aerosol-generating matrices of different viscosities in the heating module 80. The usage scenario is single, and users cannot freely switch aerosol-generating matrices of different viscosities according to their needs. They need to frequently replace the guiding liquid 40 or equipment, which is cumbersome to operate and results in limited user experience. In addition, when the heating module 80 is used for a long time, the viscosity of the internal aerosol generating matrix may change. At this time, the liquid guiding efficiency of the guiding liquid 40 for the aerosol generating matrix will be affected, resulting in uneven liquid guiding speed, which may cause problems such as dry burning (liquid guiding too slowly) or leakage (liquid guiding too quickly). The aerosolization efficiency is unstable, which reduces the service life of the heating module 80 and the user experience.

[0061] Based on the above considerations, and in order to address the difficulty of conventional liquid-guiding liquid 40 in simultaneously adapting to aerosol-generating substrates of varying viscosities, this application proposes, after in-depth research, a liquid-guiding liquid 40 comprising three functional layers: a permeable layer, a flow-guiding layer, and a heating carrier layer. By designing the pore structures within the functional layers, particularly by providing regions of varying pore structures within the permeable layer, the liquid-guiding liquid 40 can adapt to aerosol-generating substrates of varying viscosities (e.g., high-viscosity and low-viscosity substrates), thereby meeting the permeability, flow-guiding, and aerosol-generating requirements of liquids of varying viscosities within the heating module 80.

[0062] For ease of understanding, the present application is specifically described through the following examples. It should be understood that the following examples are only used to further illustrate the present application and are not used to limit the scope of the present application.

[0063] In a first aspect, the embodiment of the present application provides a liquid guide 40. Figure 1As shown, the liquid-conducting layer 40 includes a permeable layer 10, a flow-conducting layer 20 and a heating carrier layer 30 stacked in sequence; wherein, The transparent layer 10 has multiple regions with different average pore sizes distributed along the plane direction, and the average pore sizes of two adjacent regions are different; The average pore size of the pores in the guide layer 20 is less than or equal to the average pore size of the smallest pore area in the permeable layer 10; The average pore size of the pores in the heating carrier layer 30 is smaller than or equal to the average pore size of the pores in the guide layer 20 .

[0064] The first aspect of the present invention provides a liquid-conducting layer 40 comprising a sequentially stacked transparent layer 10, a flow-guiding layer 20, and a heating carrier layer 30. The transparent layer 10 has multiple regions of varying average pore sizes distributed along a planar surface, with adjacent regions having different average pore sizes. This allows the regions of varying average pore sizes to be evenly distributed within the transparent layer 10. Because pores of varying sizes can produce a wicking effect for liquids of varying viscosities, the regions of varying average pore sizes within the transparent layer 10 can wick aerosol-forming substrates of varying viscosities. Specifically, the large-pore regions are suitable for high-viscosity aerosol-forming substrates, while the small-pore regions are suitable for low-viscosity aerosol-forming substrates. After the high-viscosity aerosol-forming substrate enters the transparent layer 10 through the wicking effect of the large-pore regions, it can also be wicked and transferred within the transparent layer 10 by the small-pore regions. This ensures that the high-viscosity aerosol-forming substrate can be smoothly wicked into the subsequent flow-guiding layer 20, achieving stable transport of the high-viscosity aerosol-forming substrate. In addition, the average pore size of the pores in the guide layer 20 is less than or equal to the average pore size of the smallest pore area in the permeable layer 10, allowing the guide layer 20 to continuously wick the aerosol-generating substrate in the permeable layer 10, thereby wicking the aerosol-generating substrate from the permeable layer 10 to the guide layer 20. The guide layer 20 is used to quickly capture the aerosol-generating substrate that penetrates the permeable layer 10, has a temporary liquid storage capacity, and can guide the aerosol-generating substrate to diffuse, increasing its absorption area, thereby reducing direct point penetration of the aerosol-generating substrate. The average pore size of the pores in the heating carrier layer 30 is less than or equal to the average pore size of the pores in the guide layer 20, allowing the heating carrier layer 30 to continuously wick the aerosol-generating substrate in the guide layer 20, absorbing the aerosol-generating substrate from the guide layer 20 and transferring the aerosol-generating substrate to the heating element 50 for heating to generate aerosol. Therefore, the liquid-guiding liquid 40 of the present embodiment, by providing multiple regions of varying average pore sizes within the permeable layer 10, allows aerosol-generating substrates of varying viscosities, such as low-viscosity and high-viscosity substrates, to undergo a wicking effect within the permeable layer 10 of the liquid-guiding liquid 40. Furthermore, through the pore gradient design of the permeable layer 10, the flow-guiding layer 20, and the synergistic effect of these layers, the aerosol-generating substrate can be stably and efficiently transported and migrated within the liquid-guiding liquid. This improves the efficiency of the liquid-guiding liquid 40 in penetrating, guiding, and converting and transporting the aerosol-generating substrate, and enables the liquid-guiding liquid 40 to simultaneously adapt to and process aerosol-generating substrates of varying viscosities.

[0065] The liquid-guiding liquid 40 of the embodiment of the present application is obtained by rationally matching the above-mentioned permeable layer 10, the flow-guiding layer 20 and the heating carrier layer 30 to obtain a liquid-guiding liquid 40 with a multifunctional layer design, which improves the adaptability of the liquid-guiding liquid 40 to aerosol generating matrices of different viscosities and can adapt to the liquid-guiding requirements of aerosol generating matrices of different viscosities. The usage scenarios are diversified, and users can freely switch aerosol generating matrices of different viscosities according to their usage needs without frequently replacing the liquid-guiding liquid 40 or the equipment. The operation is simple, and the flexibility and feeling of the user experience are improved. It reduces the phenomenon of poor liquid conduction of the small-pore permeable layer 10 to the high-viscosity aerosol generating matrix and leakage of the large-pore permeable layer 10 to the low-viscosity aerosol generating matrix due to the addition of aerosol generating matrices of different viscosities during use, which leads to the phenomenon of sticking the core, leakage and poor aerosol taste experience. Furthermore, even if the viscosity of the aerosol-generating substrate within the heating module 80 changes over time, the efficiency of the liquid guide 40 in guiding the aerosol-generating substrate will not decrease due to changes in the viscosity of the aerosol-generating substrate, ensuring a stable and balanced liquid guiding speed. This prevents problems such as dry burning caused by slow liquid guiding due to increased aerosol-generating substrate viscosity, or leakage caused by rapid liquid guiding due to decreased aerosol-generating substrate viscosity. This ensures stable conversion efficiency of the aerosol-generating substrate, extending the service life of the heating module 80 and the user experience.

[0066] In some possible implementations, the pore size of each region in the permeable layer 10 is set according to the conditions of the wicking effect of the aerosol-generating matrix with different viscosities. When the liquid guide 40 has a wicking effect, its pore size r must meet r min <r<r max , where r min is the minimum pore size at which wicking can occur, r max The value of the pore size r in the liquid-conducting liquid 40 where wicking occurs is related to the liquid properties of the aerosol-generating matrix and the surface properties of the liquid-conducting liquid 40. In actual environments, the contact angle and surface tension need to be measured.

[0067] In some possible implementations, the key conditions for the wicking effect include two aspects: 1. Contact angle: The contact angle (θ) between the aerosol-generating substrate and the liquid-conducting material 40 must satisfy θ < 90°, meaning the aerosol-generating substrate must wet the surface of the liquid-conducting material 40. If θ ≥ 90°, the aerosol-generating substrate cannot be drawn into the pores of the liquid-conducting material 40 through capillary action. 2. Balance between pore size and viscosity: The pore size (r) in the liquid-conducting material 40 must be large enough to overcome the viscous resistance of the aerosol-generating substrate, but must also match the viscosity (μ) of the aerosol-generating substrate. Capillary pressure must balance viscous resistance. Excessively small pores will prevent the wicking effect or slow the liquid-conducting material, rendering the liquid-conducting material 40 unsuitable for the desired performance.

[0068] Specifically, the condition for the wicking effect to occur effectively is that the capillary pressure of the pore size of the liquid guide 40 must be greater than the viscous pressure of the aerosol generating matrix. The calculation formula for the capillary pressure can be expressed as (the force driving the wicking effect): ΔP capillary =2γcosθ / r; where γ is the surface tension of the aerosol-generating substrate (N / m), θ is the contact angle (°), and r is the pore radius (m). The formula for calculating viscous pressure (the force that impedes flow) can be expressed as: ΔP viscous =28μLv / r; where μ is the viscosity of the aerosol-generating matrix (Pa·s), L is the length of the liquid-conducting path (m), and v is the flow rate of the aerosol-generating matrix (m / s). According to the conditions for the effective occurrence of the wicking effect: ΔP capillary >ΔP viscous That is, 2γcosθ / r > 28μLv / r, which simplifies to r > γcosθ4μLv. Therefore, the pore diameter (r) in the conducting liquid 40 must be greater than a critical value determined by the viscosity (μ), flow rate (v), and the conducting path length (L). Higher viscosity requires larger pore diameters; higher flow rates also require larger pore diameters. To quantitatively analyze the conducting velocity, the Lucas-Washburn equation can be used: L² = (γcosθ*r / 2μ)*t, where L is the conducting path length (m) and t is time (s). This equation shows that the wicking velocity (dh / dt) is positively correlated with the pore radius r, surface tension γ, and wettability (cosθ), and negatively correlated with the viscosity μ. The conducting velocity (dh / dt) is proportional to the square of the pore diameter (r) of the conducting liquid 40 and inversely proportional to the viscosity (μ). For a fixed viscosity, increasing the pore diameter significantly increases the conducting velocity.

[0069] Based on the above analysis, and considering the conditions required for aerosol-generating substrates of varying viscosities to undergo a wicking effect, once the material of the liquid guide 40 is determined, the pore size requirements for wicking aerosol-generating substrates of varying viscosities can be calculated. Consequently, regions of varying average pore sizes can be provided within the permeable layer 10 to accommodate the wicking effect of aerosol-generating substrates of varying viscosities, enabling the permeable layer 10 within the liquid guide 40 to adsorb aerosol-generating substrates of varying viscosities.

[0070] In some embodiments, to ensure uniform stability of the liquid conduction for aerosol-generating matrices with different viscosities, regions with different average pore sizes in the permeable layer 10 are evenly distributed.

[0071] In some possible implementations, the aerosol-generating matrix typically includes components such as a solvent, flavors / spices, and optionally sweeteners, as well as nicotine, and small amounts of other additives. Nicotine is typically present in the form of nicotine salts or free base nicotine, with concentrations ranging from 0 mg, 3 mg, and 6 mg. Flavors / spices are used to simulate the flavors of fruits, beverages, and desserts, and can be natural or synthetic. For example, menthol provides a cooling sensation, ethyl maltol has a caramel flavor, and acetylpyrazine has a nutty flavor. Sweeteners include sucralose (sucralose) and ethyl maltol, which are used to adjust the sweetness of the mouthfeel, mask the bitterness of propylene glycol, and enhance the flavor profile of the aerosol. Other additives include deionized water for viscosity adjustment, acidity regulators for taste balance, and preservatives. The solvent base primarily consists of propylene glycol (PG) and vegetable glycol (VG). Propylene glycol dissolves nicotine and flavoring, providing a throat hit. Its low viscosity facilitates heat conduction. Glycerin, with its naturally sweet flavor and high viscosity, increases aerosol volume and makes the aerosol denser. Adjusting the ratio of PG to VG modifies the viscosity of the aerosol-forming matrix. A higher VG content results in a higher viscosity, which can also affect the aerosol's flavor and volume.

[0072] In some embodiments, an aerosol-forming substrate having a viscosity between 300 cp and 700 cp (at room temperature) is considered a high-viscosity aerosol-forming substrate. For example, the viscosity may be any typical but non-limiting value, such as 300 cp, 350 cp, 400 cp, 450 cp, 500 cp, 550 cp, 600 cp, 650 cp, or 700 cp, or an interval between any two values. In some specific embodiments, when the mass ratio of PG to VG is 7:3, the viscosity of the aerosol-forming substrate is relatively high, thus falling within the category of a high-viscosity aerosol-forming substrate.

[0073] In other embodiments, when the viscosity of the aerosol-forming substrate is between 50 cp and 300 cp (at room temperature), it can be considered a low-viscosity aerosol-forming substrate. For example, the viscosity can be any typical but non-limiting value such as 50 cp, 80 cp, 100 cp, 120 cp, 150 cp, 200 cp, 250 cp, 280 cp, or 300 cp, or an interval between any two values. In some specific embodiments, when the mass ratio of PG to VG is 1:1, the viscosity of the aerosol-forming substrate is relatively low, falling within the category of a low-viscosity aerosol-forming substrate.

[0074] In some possible implementations, such as the attached Figure 1As shown, the permeable layer 10 includes a plurality of adjacent first regions 11 and second regions 12 along a planar direction. The average pore size of the two adjacent regions is different. The average pore size of the pores in the first region 11 is larger than the average pore size of the pores in the second region 12. The average pore size of the pores in the air-guiding layer 20 is less than or equal to the average pore size of the pores in the second region 12. In this case, the larger average pore size of the pores in the first region 11 enables a wicking effect for aerosol-forming substrates with higher viscosities, while the smaller average pore size of the pores in the second region 12 enables a wicking effect for aerosol-forming substrates with lower viscosities. The average pore size of the pores in the air-guiding layer 20 is less than or equal to the average pore size of the pores in the second region 12, ensuring that the air-guiding layer 20 continuously wicks the aerosol-forming substrates in the permeable layer 10.

[0075] In some embodiments, the plurality of adjacent first regions 11 and second regions 12 in the permeable layer 10 are evenly distributed, and the average pore sizes of the two adjacent regions are different, thereby ensuring uniform stability in conducting liquid for aerosol-generating matrices with different viscosities.

[0076] In some possible implementations, with the total planar area of ​​the transparent layer 10 as 100%, the first region 11 accounts for 30% to 80% of the area, and the second region 12 accounts for 20% to 70% of the area. In this case, the larger pore size of the first region 11 fully ensures the wicking efficiency of the transparent layer 10 for high-viscosity aerosol-generating substrates, resulting in better compatibility of the transparent layer 10 with high-viscosity aerosol-generating substrates. The smaller pore size of the second region 12, on the other hand, fully ensures the wicking efficiency of the transparent layer 10 for low-viscosity aerosol-generating substrates, resulting in better compatibility of the transparent layer 10 with low-viscosity aerosol-generating substrates. The mismatch between reducing the viscosity of the aerosol-generating substrate and the wicking effect of the transparent layer 10 can lead to problems such as slow liquid conduction, resulting in dry burning, or excessive penetration, resulting in leakage.

[0077] For example, based on the total area of ​​the transmissive layer 10 in the plane direction as 100%, the area of ​​the first region 11 may account for 30%, and the area of ​​the second region 12 may account for 70%; or the area of ​​the first region 11 may account for 35%, and the area of ​​the second region 12 may account for 65%; or the area of ​​the first region 11 may account for 40%, and the area of ​​the second region 12 may account for 60%; or the area of ​​the first region 11 may account for 45%, and the area of ​​the second region 12 may account for 55%; or the area of ​​the first region 11 may account for 50%, and the area of ​​the second region 12 may account for 50%; or the area of ​​the first region 11 may account for 50%. The area proportion of the first area 11 can be 55%, and the area proportion of the second area 12 can be 45%; or the area proportion of the first area 11 can be 60%, and the area proportion of the second area 12 can be 40%; or the area proportion of the first area 11 can be 65%, and the area proportion of the second area 12 can be 35%; or the area proportion of the first area 11 can be 70%, and the area proportion of the second area 12 can be 30%; or the area proportion of the first area 11 can be 75%, and the area proportion of the second area 12 can be 25%; or the area proportion of the first area 11 can be 80%, and the area proportion of the second area 12 can be 20%.

[0078] In some possible implementations, the average pore size of the first region 11 ranges from 130 μm to 300 μm. In this case, the pore size of the first region 11 is capable of wicking aerosol-forming substrates with higher viscosities, particularly those with viscosities of 300 cp to 700 cp, ensuring that the guiding liquid 40 effectively guides the high-viscosity aerosol-forming substrate. This avoids the situation where an excessively small pore size can lead to a dramatic increase in flow resistance, resulting in slow wicking speed and an inability to meet the flow requirements for the aerosol-forming substrate; and also avoids the situation where an excessively large pore size can significantly reduce capillary pressure and similarly result in insufficient wicking efficiency.

[0079] Exemplarily, the average pore size of the first region 11 can be 130μm, 140μm, 150μm, 160μm, 170μm, 180μm, 190μm, 200μm, 210μm, 220μm, 230μm, 240μm, 250μm, 260μm, 270μm, 280μm, 290μm, 300μm, or any other typical but non-limiting point value or an interval value between any two point values.

[0080] In some possible implementations, the average pore size of the second region 12 is 50 μm to 130 μm. In this case, the pore size of the first region 11 is sufficient to provide a wicking effect for aerosol-generating substrates with lower viscosities, particularly those with viscosities of 50 cp to 300 cp, thereby ensuring that the guiding liquid 40 effectively guides the low-viscosity aerosol-generating substrate. This avoids the situation where an excessively small pore size can lead to a dramatic increase in flow resistance, resulting in slow wicking speed and an inability to meet the flow requirements for the aerosol-generating substrate, while also avoiding the situation where an excessively large pore size can significantly reduce capillary pressure and similarly lead to insufficient wicking efficiency.

[0081] For example, the average pore size of the second region 12 can be any typical but non-limiting value such as 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, or an interval value between any two values.

[0082] In some possible implementations, the average pore size of the guide layer 20 is 40 μm to 120 μm. In this case, the pore size of the guide layer 20 ensures wicking transfer of the aerosol-generating substrate from the permeable layer 10 to the guide layer 20. It can quickly capture the aerosol-generating substrate that penetrates the permeable layer 10, provides temporary liquid storage capacity, and guides the aerosol-generating substrate to diffuse, increasing its absorption area, thereby reducing direct point penetration of the aerosol-generating substrate. This avoids the situation where the pores in the guide layer 20 are too large, which would allow the aerosol-generating substrate to directly penetrate, hindering continuous wicking and prone to point penetration, resulting in uneven aerosol-generating substrate penetration; and it also avoids the situation where the pores in the guide layer 20 are too small, which would result in insufficient aerosol-generating substrate flow and an inability to store a sufficient amount of aerosol-generating substrate.

[0083] For example, the average pore size of the guide layer 20 may be any typical but non-limiting value such as 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, or 120 μm, or an interval between any two values.

[0084] In some possible implementations, the average pore size of the air-guiding layer 20 is 5 μm to 30 μm smaller than the average pore size of the second region 12. In this case, the average pore size of the air-guiding layer 20 is 5 μm to 30 μm smaller than the average pore size of the second region 12 of the permeable layer 10, which is smaller than the average pore size of the smaller pore size. This ensures that a certain capillary force difference is maintained between the two layers, but does not exceed such a large difference as to cause turbulence of the aerosol-generating substrate within the fibers. This allows for continuous wicking of the aerosol-generating substrate from the permeable layer 10 to the air-guiding layer 20.

[0085] Exemplarily, the average pore size of the guide layer 20 is smaller than the average pore size of the second region 12 by 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, or any other typical but non-limiting point value or an interval value between any two point values.

[0086] In some possible implementations, the average pore size of the heating carrier layer 30 ranges from 40 μm to 100 μm. In this case, the pore size of the heating carrier layer 30 ensures a sustained wicking effect on the aerosol-generating substrate in the guide layer 20, absorbing the aerosol-generating substrate from the guide layer 20 and providing the heating element 50 with heating for conversion into aerosol, while also ensuring efficient conversion of the aerosol-generating substrate. This avoids excessively large pores in the heating carrier layer 30, which can lead to excessive aerosol-generating substrate flow and incomplete conversion, thus affecting the conversion effect. It also avoids excessively small pores in the heating carrier layer 30, which can take longer to achieve the same aerosol-generating substrate flow, leading to flow interruptions and wicking.

[0087] For example, the average pore size of the heating carrier layer 30 can be 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, or any other typical but non-limiting value, or an interval between any two values.

[0088] In some possible implementations, the average pore size of the heating carrier layer 30 is 5 μm to 30 μm smaller than the average pore size of the air-guiding layer 20. In this case, the average pore size of the heating carrier layer 30 is 5 μm to 30 μm smaller than the average pore size of the air-guiding layer 20. This ensures a sufficient capillary force difference between the two layers, while not being so large as to cause turbulent flow of the aerosol-generating substrate within the fibers. This allows for continuous wicking of the aerosol-generating substrate from the air-guiding layer 20 to the heating carrier layer 30.

[0089] Exemplarily, the average pore size of the heating carrier layer 30 is smaller than the average pore size of the guide layer 20 by 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, or any other typical but non-limiting value or an interval between any two values.

[0090] In some possible implementations, the grammage of the permeable layer 10 is 15gsm~150gsm. It should be noted that grammage refers to mass per unit area. The measurement method of grammage in the embodiments of the present application refers to the national standard GB / T 24218.1-2009. When the grammage is low, the fiber layer is thin and the porosity is large, and the aerosol generating matrix conduction speed is fast, but it is easy to leak under gravity or pressure due to excessive liquid supply, resulting in leakage or "liquid spraying"; when the grammage is high, the fiber layer is thick and the density is high, the fibers are tightly bonded, the capillary effect is strong, the liquid conduction path is extended, the liquid supply speed is slowed down, but the liquid can be supplied more stably and continuously. The grammage of the permeable layer 10 is within the range of 15gsm~150gsm, which can fully balance the liquid conduction speed, liquid locking ability, and subsequent conversion effect of the aerosol generating matrix.

[0091] Exemplarily, the grammage of the transparent layer 10 can be 15gsm, 20gsm, 25gsm, 30gsm, 35gsm, 40gsm, 45gsm, 50gsm, 55gsm, 60gsm, 65gsm, 70gsm, 75gsm, 80gsm, 85gsm, 90gsm, 100gsm, 105gsm, 110gsm, 115gsm, 120gsm, 125gsm, 130gsm, 135gsm, 140gsm, 145gsm, 150gsm, or any other typical but non-limiting point value or an interval value between any two point values.

[0092] In some possible implementations, the grammage of the first region 11 is 40gsm~80gsm; illustratively, the grammage of the first region 11 can be 40gsm, 45gsm, 50gsm, 55gsm, 60gsm, 65gsm, 70gsm, 75gsm, 80gsm, or other typical but non-restrictive arbitrary point values ​​or an interval value between any two point values.

[0093] In some possible implementations, the grammage of the second region 12 is 40 gsm to 80 gsm. For example, the grammage of the second region 12 can be 40 gsm, 45 gsm, 50 gsm, 55 gsm, 60 gsm, 65 gsm, 70 gsm, 75 gsm, 80 gsm, or any other typical but non-limiting value, or an interval between any two values.

[0094] In some embodiments, in the transparent layer 10 , the gram weights of the first region 11 and the second region 12 may be the same or different.

[0095] In some embodiments, to better balance performance such as liquid conduction speed, liquid retention, thermal stability, and conversion efficiency, the permeable layer 10 may be constructed using multiple fiber layers of varying weights. For example, a low-weight outer layer (for rapid liquid conduction) and a high-weight inner layer (for liquid retention and cushioning) are employed to balance response speed and stability. Alternatively, a gradient weight composite may be employed, for example, with the weight gradually increasing or decreasing from the heating end to the liquid storage end, to optimize the flow path of the aerosol-generating matrix and reduce residual ungenerated matrix.

[0096] In some possible implementations, the guide layer 20 has a grammage of 20 gsm to 200 gsm. In this case, the guide layer 20 has a wide grammage range, and fiber layers of different grammage sizes can be selected as the guide layer 20 according to actual application requirements to fully balance the liquid conduction speed, liquid retention ability, and subsequent conversion effect of the aerosol-generating substrate.

[0097] For example, the weight of the guide layer 20 can be 20gsm, 25gsm, 30gsm, 35gsm, 40gsm, 45gsm, 50gsm, 55gsm, 60gsm, 65gsm, 70gsm, 75gsm, 80gsm, 85gsm, 90gsm, 100gsm, 105gsm, 110gsm, 115gsm, 120gsm gsm, 190gsm, 195gsm, 200gsm, and the like, or any other typical but non-limiting point values ​​or interval values ​​between any two point values.

[0098] In some embodiments, to better balance performance such as liquid conduction speed, liquid retention, thermal stability, and conversion efficiency, the flow-guiding layer 20 may be constructed from multiple fiber layers of varying weights. For example, a low-weight outer layer (for rapid liquid conduction) and a high-weight inner layer (for liquid retention and cushioning) can be employed to balance response speed and stability. Alternatively, a gradient weight composite can be employed, for example, with the weight gradually increasing or decreasing from the heating end to the liquid storage end, to optimize the flow path of the aerosol-generating matrix and reduce residual ungenerated matrix.

[0099] In some possible implementations, the heating carrier layer 30 has a grammage of 30 gsm to 300 gsm. In this case, the heating carrier layer 30 has a wide grammage range, and fiber layers of different grammage sizes can be selected as the heating carrier layer 30 according to actual application requirements to fully balance the liquid conduction speed, liquid retention ability, and subsequent conversion effect of the aerosol-generating substrate.

[0100] For example, the grammage of the heating carrier layer 30 can be 30gsm, 35gsm, 40gsm, 45gsm, 50gsm, 55gsm, 60gsm, 65gsm, 70gsm, 75gsm, 80gsm, 85gsm, 90gsm, 100gsm, 105gsm, 110gsm, 115gsm, 120gsm, 125gsm, 130gsm, 135gsm, 140gsm, 145gsm, 150 ... gsm, 155gsm, 160gsm, 165gsm, 170gsm, 175gsm, 180gsm, 185gsm, 190gsm, 195gsm, 200gsm, 210gsm, 220gsm, 230gsm, 240gsm, 250gsm, 260gsm, 270gsm, 280gsm, 290gsm, 300gsm and the like are typical but non-limiting point values ​​or the interval value between any two point values.

[0101] In some embodiments, to better balance performance such as liquid conduction speed, liquid retention, thermal stability, and conversion efficiency, the heating carrier layer 30 may be constructed using multiple fiber layers of varying weights. For example, a low-weight outer layer (for rapid liquid conduction) and a high-weight inner layer (for liquid retention and cushioning) can balance response speed and stability. Alternatively, a gradient weight composite can be employed, for example, with the weight gradually increasing or decreasing from the heating end to the liquid storage end, to optimize the flow path of the aerosol-generating substrate and reduce residual ungenerated substrate.

[0102] In some embodiments, in the liquid-conducting liquid 40, the gram weights of the transparent layer 10, the guide layer 20 and the heating carrier layer 30 can adopt a composite form of gradient gram weight, that is, the gram weight of the transparent layer 10 is lower than the gram weight of the guide layer 20, and the gram weight of the guide layer 20 is lower than the gram weight of the heating carrier layer 30, forming a trend of gradually increasing gram weight from the transparent layer 10 to the heating carrier layer 30, optimizing the flow path and smoothness of the aerosol generating matrix, and reducing the residue of the non-aerosol generating matrix body.

[0103] In some possible implementations, the thickness of the transparent layer 10 is 0.2 mm to 3 mm. In this case, the thickness of the transparent layer 10 can provide a sufficient continuous channel for liquid wicking for the aerosol-generating substrate, while ensuring that the transparent layer 10 performs initial transfer wicking of the aerosol-generating substrate and is adaptable to aerosol-generating substrates of varying viscosities. This prevents the transparent layer 10 from being too thick, which could affect the initial transfer wicking of the aerosol-generating substrate, while also preventing the transparent layer 10 from being too thin, which could impair its adaptability to aerosol-generating substrates of varying viscosities and provide a sufficient continuous channel for liquid wicking.

[0104] Exemplarily, the thickness of the transparent layer 10 can be 0.2 mm, 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, or any other typical but non-limiting value, or an interval between any two values.

[0105] In some possible implementations, the thickness of the first region 11 is 0.2 mm to 1.8 mm. For example, the thickness of the first region 11 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, or any other typical but non-limiting value, or an interval between any two values.

[0106] In some possible implementations, the thickness of the second region 12 is 0.2 mm to 1.2 mm. For example, the thickness of the first region 11 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, or any other typical but non-limiting value, or a range between any two values.

[0107] In some possible implementations, the thickness of the first region 11 and the thickness of the second region 12 in the transparent layer 10 may be the same or different. For example, in the transparent layer 10, the thickness of the first region 11 is different from the thickness of the second region 12. In this case, the surface of the transparent layer 10 formed by the uniform and adjacent distribution of the first and second regions 11, 12 has different heights, forming a concave-convex structure on the surface, thereby increasing the contact surface area between the transparent layer 10 and the aerosol-generating substrate.

[0108] In some possible implementations, the guide layer 20 has a thickness of 0.2 mm to 7.5 mm. In this case, the thickness of the guide layer 20 ensures both the guiding and penetration effect of the aerosol-generating substrate and the temporary storage performance of the aerosol-generating substrate. This avoids the situation where the guide layer 20 is too thick, which may affect the penetration performance of the aerosol-generating substrate, and the situation where the guide layer 20 is too thin, which may affect the storage of the aerosol-generating substrate and the flow of the aerosol-generating substrate.

[0109] Exemplarily, the thickness of the guide layer 20 can be 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, or any other typical but non-limiting value, or an interval between any two values.

[0110] In some possible implementations, the thickness of the heating carrier layer 30 is 0.2 mm to 4.5 mm. In this case, the thickness of the heating carrier layer 30 is sufficient to ensure the effective diversion and conversion of the aerosol-generating substrate, avoiding problems such as the core being easily burnt due to a too thick heating carrier layer 30, and the incomplete conversion affecting the effect due to a too thin heating carrier layer 30.

[0111] Exemplarily, the thickness of the heating carrier layer 30 can be 0.2 mm, 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.8 mm, 4.0 mm, or any other typical but non-limiting value or an interval between any two values.

[0112] In some possible implementations, in the transmission layer 10, the distribution of the first region 11 and the second region 12 includes alternating distribution (e.g., Figure 2 As shown), chessboard distribution (as shown in the attached Figure 3 As shown), random discrete distribution (as shown in the attached Figure 4 As shown), clustered distribution (as shown in the attached Figure 5At least one of the following is shown. In this case, the first region 11 and the second region 12 are fully uniformly distributed, so that the average pore sizes of adjacent regions are different, ensuring that regions with different average pore sizes in the permeable layer 10 can all produce a stable wicking effect for aerosol-forming matrices of different viscosities. Alternating distribution refers to the repeated arrangement of the first region 11 and the second region 12 in a periodic layered structure, for example, first region 11-second region 12-first region 11-second region 12..., forming a clear interface. Exemplarily, along the plane of the permeable layer 10, the first region 11 and the second region 12 alternate longitudinally and are layered along the length of the permeable layer 10. Exemplarily, along the plane of the permeable layer 10, the first region 11 and the second region 12 alternate transversely and are layered along the width of the permeable layer 10. In a checkerboard distribution (grid-like distribution), the first region 11 and the second region 12 are periodically arranged in a checkerboard pattern on a two-dimensional plane, forming a grid-like cross structure. For example, in an orthogonal grid, rows and columns are alternately filled with different regions; in an oblique grid, regions are arranged at 45° angles, enhancing structural isotropy. In a random discrete distribution, the first regions 11 and the second regions 12 are distributed in a random pattern within the permeable layer 10, without clear periodicity or directionality. In a clustered distribution (regionally concentrated distribution), the first regions 11 or the second regions 12 are concentrated in a continuous block, forming a functionalized area. For example, in a central block, the liquid-conducting core is made of a high-porosity material, while the outer layer is wrapped with a heat-resistant material. In an annular block, the annular liquid-conducting channel is combined with the central liquid-locking region to form a three-level structure of "liquid-conducting-liquid-locking-aerosol generation."

[0113] In some possible implementations, the material of the permeable layer 10 includes at least one of natural cellulose fibers, natural protein fibers, regenerated cellulose fibers, and synthetic fibers. These fibers exhibit good wettability with the aerosol-generating matrix, facilitating a wicking effect for aerosol-generating matrix of varying viscosities within the permeable layer 10, with regions of varying average pore sizes. The hydroxyl groups (-OH) in natural cellulose fibers impart strong liquid absorption, enabling rapid absorption and conduction of the aerosol-generating matrix, improving conversion efficiency and reducing the risk of dry burns. Natural cellulose fibers are also readily available, have mature processing technologies, and exhibit good biodegradability, thus complying with environmental trends and achieving high user acceptance. Natural protein fibers have a structure similar to human tissue, resulting in increased safety and a low risk of allergies. Natural protein fibers may inhibit microbial growth and extend the life of the conductive liquid. Their curly structure can buffer the flow of the aerosol-generating matrix, reducing splashing and making them suitable for applications requiring rate control. Regenerated cellulose fibers are made from natural polymer compounds (such as cellulose) through chemical and mechanical processing. Essentially, it is a chemically modified product of natural cellulose, combining the comfort of natural fibers with the processability of chemical fibers. Chemical modification balances hygroscopicity and strength in regenerated cellulose fibers, resulting in more uniform liquid conduction. Its structure is controllable, and its porosity can be customized to optimize the balance between liquid retention and conduction, thereby reducing leakage. Synthetic fibers are polymer fibers made from non-renewable resources such as petroleum, natural gas, and coal through chemical synthesis. Their essence is a man-made, long-chain molecular structure. Synthetic fibers offer excellent heat resistance and can withstand high temperatures, reducing the risk of carbonization. Liquid conduction speed and liquid retention can be precisely controlled by designing the fiber diameter and porosity. Resistant to acids, alkalis, and oxidation, they exhibit excellent chemical stability, extending the liquid conduction life by 40 days. Their high plasticity makes them easily processable into complex structures, adapting to different heating module designs.

[0114] In some possible implementations, the material of the guide layer 20 includes at least one of natural cellulose fibers, natural protein fibers, regenerated cellulose fibers, and synthetic fibers. These fibers fully ensure the liquid absorption capacity of the guide layer 20, enabling rapid absorption and conduction of the aerosol-forming matrix. They also help ensure a balance between liquid storage and liquid conduction in the guide layer 20, thereby reducing leakage.

[0115] In some possible implementations, the material in the heating carrier layer 30 includes at least one of natural cellulose fibers, regenerated cellulose fibers, and synthetic fibers. These fibers have high thermal stability, strong liquid absorption capacity, and good liquid conduction effect, which can fully ensure the liquid conduction and conversion performance of the heating carrier layer 30. Among them, special fibers refer to fiber materials with special physical, chemical or biological properties, which are usually prepared through special processes to meet functional requirements in specific scenarios. In the field of the liquid-conducting material 40 of the aerosol generating device 100, the application of special fibers can specifically address the limitations of traditional materials, such as insufficient heat resistance, uneven liquid conduction, and poor environmental protection.

[0116] In some possible implementations, the natural cellulose fiber includes at least one of cotton, hemp, coconut shell, wood pulp, and bamboo fibers. These natural cellulose fibers contain hydroxyl (-OH) groups within their molecules, giving them strong liquid absorption capacity. They can quickly absorb and conduct the aerosol-forming matrix, improving aerosolization efficiency and reducing the risk of dry burning. They are also naturally derived, readily available, and have mature processing technology. They are biodegradable, environmentally friendly, and highly acceptable to users. Cotton fibers, with their hollow structure (80%-90% hollow) and natural crimp, provide efficient capillary channels and high liquid conduction speed. Hemp fibers offer high strength and heat resistance, with a breaking strength twice that of cotton fibers, a heat resistance of up to 220°C, and strong deformation resistance. Furthermore, they contain natural antibacterial components that inhibit microbial growth and extend the life of the liquid conductor by 40 days. Coconut shell fibers, with their ultra-coarse pores, large fiber diameter, and high porosity, offer extremely fast liquid conduction speed. Wood pulp fibers offer a balanced balance between liquid conduction speed and liquid retention, minimizing the risk of leakage. Bamboo fiber, containing bamboo quinone, has an inhibitory rate of over 90% against Staphylococcus aureus and Escherichia coli. It is also highly hygroscopic, with microporous surfaces, allowing for rapid liquid conduction and superior liquid retention to cotton fibers.

[0117] In some possible implementations, the natural protein fiber includes at least one of wool fiber and silk fiber. The protein structure of these natural protein fibers is similar to that of human tissue, resulting in higher safety and lower allergy risk. Furthermore, natural protein may inhibit microbial growth, extending the lifespan of the conductive liquid. Its fiber curl structure can buffer the flow of the aerosol-generating matrix, reducing splashing and making it suitable for scenarios requiring speed control. Wool fibers, with their natural curl (like the scale structure of wool), form spring-like channels that cushion the impact of the aerosol-generating matrix and reduce splashing risk. They also have high hygroscopicity, high water content, and high liquid transfer speed, making them suitable for high-viscosity aerosol-generating matrices. Silk fibers, with their large surface area, high liquid transfer speed, and uniform distribution, also possess natural antibacterial and biocompatible properties.

[0118] In some possible implementations, the regenerated cellulose fiber includes at least one of viscose, lyocell, modal, and cupro. These four typical regenerated cellulose fibers are all made from natural cellulose (such as wood pulp or bamboo pulp) through a chemical dissolution-regeneration process. Chemical modification balances hygroscopicity and strength, resulting in more uniform liquid conduction. Furthermore, the structure is controllable, allowing for customized porosity to optimize the balance between liquid retention and conduction, reducing leakage. Viscose fiber, with its multi-grooved surface and large specific surface area, offers extremely fast liquid conduction and high hygroscopicity. The wet spinning process allows for controllable fiber diameter, optimizing the balance between conduction and conduction. Lyocell fiber, with its dense fiber structure, offers superior liquid conduction uniformity compared to viscose, reducing the risk of localized accumulation of aerosol-generating matrix. It also retains >85% of its strength in a wet state, exhibits strong deformation resistance, and is suitable for frequent insertion and removal. Modal fiber has a round cross-section and a smooth surface, which reduces shear forces on the aerosol-forming matrix during liquid transfer, resulting in a softer mouthfeel. Its wet modulus is twice that of viscose, offering excellent wrinkle resistance and dimensional stability.

[0119] In some possible implementations, the synthetic fiber includes at least one of polyethylene terephthalate (PET), polypropylene (PP), polyamide (PA), and polylactic acid (PLA). These synthetic fibers offer excellent heat resistance and can withstand high temperatures, reducing the risk of carbonization. Fiber diameter and porosity can be precisely controlled to achieve precise control of liquid conduction speed and liquid retention. Their excellent chemical stability extends the life of the liquid conduction device 40. Their high plasticity allows for easy processing into complex structures to accommodate various heating module 80 designs. Polyethylene terephthalate (PET) fibers offer excellent heat resistance, high strength, deformation resistance, and chemical stability. Polypropylene (PP) fibers are ultra-lightweight, hydrophobic, and chemically resistant. Polyamide (PA) offers elastic liquid conduction and a high degree of fiber crimp, which cushions the flow of the aerosol-generating matrix and reduces the risk of splashing. Their smooth surface makes aerosol-generating matrix residue easy to clean, extending the life of the liquid conduction device 40. Polylactic acid (PLA) exhibits excellent biodegradability and a tunable degradation rate, making it environmentally friendly.

[0120] In some possible implementations, the heating carrier layer includes at least one specialty fiber selected from poly(m-phenylene-m-phthalamide) (PMIA), polytetrafluoroethylene (PTFE), polybenzimidazole (PBI), and silicate-based viscose (Visil). These specialty fibers offer high heat resistance and uniform liquid conduction. PMIA fiber, with its excellent flame retardancy, high-temperature resistance, and high strength, is suitable for high-power aerosol generators 100. Polytetrafluoroethylene (PTFE) fiber, with its superhydrophobicity, chemical resistance, and self-cleaning properties, is suitable for leak-proof aerosol generators 100. Polybenzimidazole (PBI) fiber is suitable for ultra-high-temperature environments and offers strong impact resistance. Silicate-based viscose (Visil), containing 30%-40% inorganic silicate, is self-extinguishing and droplet-free. Its combustion product is silicon dioxide. It is heat-resistant and biodegradable, making it suitable for environmentally friendly aerosol generators 100.

[0121] In some possible implementations, in the liquid-guiding layer 40, the average pore size of the first region 11 of the permeable layer 10 is 130 μm to 300 μm; the average pore size of the second region 12 is 50 μm to 130 μm; the average pore size of the flow-guiding layer 20 is 40 μm to 120 μm; and the average pore size of the heating carrier layer 30 is 40 μm to 100 μm. In this case, the liquid-guiding layer 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0122] In some possible implementations, the thickness of the first region 11 of the permeable layer 10 in the liquid-guiding layer 40 is 0.2 mm to 1.8 mm; the thickness of the second region 12 is 0.2 mm to 1.2 mm; the thickness of the flow-guiding layer 20 is 0.2 mm to 7.5 mm; and the thickness of the heating carrier layer 30 is 0.2 mm to 4.5 mm. In this case, the liquid-guiding layer 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0123] In some possible implementations, the first region 11 of the permeable layer 10 has a grammage of 40 gsm to 80 gsm; the second region 12 has a grammage of 40 gsm to 80 gsm; the flow-guiding layer 20 has a grammage of 20 gsm to 200 gsm; and the heating carrier layer 30 has a grammage of 30 gsm to 300 gsm. In this case, the liquid guiding layer 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0124] The conductive liquid 40 in the above embodiment of the present application can be prepared by the following embodiment method.

[0125] In the second aspect, the present invention provides a method for preparing a conductive liquid 40, as shown in the attached Figure 6 As shown, the following steps are included: S10. Preparation of a transparent layer 10, the transparent layer 10 has a plurality of regions with different average pore sizes distributed along the plane direction, and the average pore sizes of two adjacent regions are different; S20. Preparing a guide layer 20, the average pore size of the guide layer 20 is less than or equal to the average pore size of the smallest pore region of the permeable layer 10; S30. Preparing a heating carrier layer 30, the average pore size of the pores in the heating carrier layer 30 is less than or equal to the average pore size of the pores in the guide layer 20; S40 . The permeable layer 10 , the fluid guiding layer 20 and the heating carrier layer 30 are stacked and combined in sequence to obtain the fluid guiding layer 40 .

[0126] The method for preparing the liquid-conducting material 40 of the embodiment of the present application comprises preparing the permeable layer 10, the flow-guiding layer 20, and the heating carrier layer 30 separately, and then stacking and combining the permeable layer 10, the flow-guiding layer 20, and the heating carrier layer 30 in sequence to obtain the liquid-conducting material 40. The preparation process is simple and suitable for large-scale industrial production and application. The permeable layer 10 has multiple regions of different average pore sizes distributed along the plane, and the average pore sizes of two adjacent regions are different. The regions of different average pore sizes in the permeable layer 10 produce a wicking effect on aerosol-generating substrates of different viscosities. The average pore size of the pores in the flow-guiding layer 20 is less than or equal to the average pore size of the smallest pore region in the permeable layer 10, so that the flow-guiding layer 20 continuously wicks the aerosol-generating substrate in the permeable layer 10, thereby wicking the aerosol-generating substrate from the permeable layer 10 to the flow-guiding layer 20. The average pore size of the pores in the heating carrier layer 30 is less than or equal to the average pore size of the pores in the guide layer 20, allowing the heating carrier layer 30 to continuously wick the aerosol-generating substrate from the guide layer 20, absorbing the aerosol-generating substrate from the guide layer 20 and delivering the aerosol-generating substrate to the heating element 50 for aerosolization. Therefore, through the synergistic effect of the permeable layer 10, the guide layer 20, and the heating carrier layer 30, the liquid guide 40 can simultaneously adapt to and process aerosol-generating substrates of varying viscosities, while providing a good diversion effect on the aerosol-generating substrate, thereby fully ensuring the conversion of the aerosol-generating substrate.

[0127] In the above step S10, the permeable layer 10 is prepared. In some possible implementations, the preparation process of the permeable layer 10 includes: forming the fibers through dry-laying and / or wet-laying, and then strengthening them through hydroentangling and / or needle punching.

[0128] In some possible implementations, dry-laid web formation involves mechanical carding or airflow to disperse fibers into single fibers, which are then arranged into a web using a web-forming mechanism (such as a screen or roller). Depending on the equipment, this can be categorized into: carded web formation, in which fibers are loosened, aligned, and agglomerated using a carding machine. Air-laid web formation, in which fibers are dispersed by airflow and then attached to a web-forming curtain by negative pressure to form a three-dimensionally arranged web. This method offers high production efficiency and flexible processing, allowing for adjustable fiber alignment (e.g., unidirectional or random). It is suitable for long fibers (such as polyester and polypropylene) and can also process short fibers.

[0129] In some possible implementations, wet-laid web formation involves dispersing fibers in water to form a suspension, which is then evenly sprayed onto a mesh screen through a headbox. Dewatering occurs via vacuum or gravity, forming a fiber web. This process is similar to papermaking. It is suitable for short fibers (such as wood pulp, cotton linters, and chemical staple fibers), especially ultra-short fibers. The resulting fiber web is uniform and can produce high-basis-weight, high-density materials.

[0130] In some possible implementations, the hydroentanglement process uses high-pressure water jets (10-150 MPa) to puncture a web, entangling the fibers and strengthening the web structure. The process includes: web pre-wetting → multiple high-pressure water jet punctures → dehydration → drying → winding. This process avoids the use of chemical adhesives, making it environmentally friendly. The product is soft, breathable, and highly absorbent.

[0131] In some possible implementations, the needlepunch process uses barbed needles to repeatedly puncture a fiber web, strengthening it through mechanical fiber entanglement. The process includes: web feeding → needles moving up and down to puncture → web contraction → finished product output. This process is widely applicable and can process a variety of fibers (natural, synthetic, and blended). The product is high-strength and can process heavy materials such as carpet and sound insulation. The process is simple and highly efficient.

[0132] In some possible implementations, the steps of preparing the permeable layer 10 include: separately preparing a plurality of first regions 11 and second regions 12, and arranging the first regions 11 and the second regions 12 alternately and adjacently along the plane of the permeable layer 10 to form the permeable layer 10. The average pore size of the pores in the first regions 11 is larger than the average pore size of the pores in the second regions 12; and the average pore size of the pores in the flow-guiding layer 20 is less than or equal to the average pore size of the pores in the second regions 12. In this case, the larger average pore size of the pores in the first regions 11 enables a wicking effect for aerosol-generating substrates with higher viscosities, while the smaller average pore size of the pores in the second regions 12 enables a wicking effect for aerosol-generating substrates with lower viscosities. After the high-viscosity aerosol-generating substrate enters the permeable layer 10 through wicking in the large-pore regions, it can also be wicked and transferred within the permeable layer 10 by the small-pore regions. This ensures that the high-viscosity aerosol-generating substrate can be smoothly wicked into the subsequent flow-guiding layer 20, achieving stable transport of the high-viscosity aerosol-generating substrate. The average pore size of the pores in the guide layer 20 is smaller than or equal to the average pore size of the pores in the second region 12 , ensuring that the guide layer 20 continuously wicks the aerosol-generating substrate in the permeable layer 10 .

[0133] In some possible implementations, with the total planar area of ​​the transparent layer 10 as 100%, the first region 11 accounts for 30% to 80% of the area, and the second region 12 accounts for 20% to 70% of the area. In this case, the larger pore size of the first region 11 fully ensures the wicking efficiency of the transparent layer 10 for high-viscosity aerosol-generating substrates, resulting in better compatibility of the transparent layer 10 with high-viscosity aerosol-generating substrates. The smaller pore size of the second region 12, on the other hand, fully ensures the wicking efficiency of the transparent layer 10 for low-viscosity aerosol-generating substrates, resulting in better compatibility of the transparent layer 10 with low-viscosity aerosol-generating substrates. The mismatch between reducing the viscosity of the aerosol-generating substrate and the wicking effect of the transparent layer 10 can lead to problems such as slow liquid conduction, resulting in dry burning, or excessive penetration, resulting in leakage.

[0134] In some possible implementations, the average pore size of the first region 11 is 130 μm to 300 μm. In some possible implementations, the average pore size of the second region 12 is 50 μm to 130 μm. In this case, the pore size of the first region 11 can produce a wicking effect on aerosol-generating substrates with higher viscosities, especially for aerosol-generating substrates with viscosities of 300 cp to 700 cp, thereby ensuring the guiding effect of the liquid guide 40 on high-viscosity aerosol-generating substrates. The pore size of the first region 11 can produce a wicking effect on aerosol-generating substrates with lower viscosities, especially for aerosol-generating substrates with viscosities of 50 cp to 300 cp, thereby ensuring the guiding effect of the liquid guide 40 on low-viscosity aerosol-generating substrates.

[0135] In the above step S20, the guide layer 20 is prepared. In some possible implementations, the preparation process of the guide layer 20 includes: forming the fibers through dry-laying and / or wet-laying, and then reinforcing them through hydroentangling and / or needle-punching.

[0136] In some possible implementations, the average pore size of the guide layer 20 is 40 μm to 120 μm. In this case, the pore size of the guide layer 20 ensures wicking transfer of the aerosol-generating substrate from the permeable layer 10 to the guide layer 20. The guide layer 20 can quickly capture the aerosol-generating substrate that permeates the permeable layer 10, provides temporary liquid storage, and guides the diffusion of the aerosol-generating substrate, increasing its absorption area, thereby reducing direct point penetration of the aerosol-generating substrate.

[0137] In some possible implementations, the average pore size of the air-guiding layer 20 is 5 μm to 30 μm smaller than the average pore size of the second region 12. In this case, a certain capillary force difference between the two layers can be sufficiently maintained, but the difference is not so large as to cause turbulence of the aerosol-generating substrate within the fibers, thereby ensuring continuous wicking transfer of the aerosol-generating substrate from the permeable layer 10 to the air-guiding layer 20.

[0138] In the above step S30, a heating carrier layer 30 is prepared. In some possible implementations, the preparation process of the heating carrier layer 30 includes: forming the fibers through dry-laying and / or wet-laying, and then strengthening them through hydroentangling and / or needle punching.

[0139] In some possible implementations, the average pore size of the heating carrier layer 30 is 40 μm to 100 μm. In this case, the pore size of the heating carrier layer 30 ensures a continuous wicking effect on the aerosol-generating substrate in the guide layer 20, absorbing the aerosol-generating substrate from the guide layer 20 and providing the heating element 50 for aerosolization, while also ensuring the aerosolization effect of the aerosol-generating substrate.

[0140] In some possible implementations, the average pore size of the heating carrier layer 30 is 5 μm to 30 μm smaller than the average pore size of the air guide layer 20. In this case, a certain capillary force difference between the two layers is sufficiently maintained, but the difference is not so large as to cause turbulence in the aerosol-generating substrate within the fibers, thereby ensuring continuous wicking transfer of the aerosol-generating substrate from the air guide layer 20 to the heating carrier layer 30.

[0141] In step S40, the permeable layer 10, the fluid-guiding layer 20, and the heating carrier layer 30 are stacked sequentially and tightly and stably bonded together by edge lamination or rolling. In this case, no adhesive is used between the permeable layer 10, the fluid-guiding layer 20, and the heating carrier layer 30 to prevent the adhesive from affecting the pore size distribution and, consequently, the fluid-guiding effect.

[0142] In some possible implementations, the average pore size of the first region 11 is 130 μm to 300 μm; the average pore size of the second region 12 is 50 μm to 130 μm; the average pore size of the guide layer 20 is 40 μm to 120 μm; and the average pore size of the heating carrier layer 30 is 40 μm to 100 μm. In this case, the guiding liquid 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0143] In some possible implementations, the thickness of the first region 11 is 0.2 mm to 1.8 mm; the thickness of the second region 12 is 0.2 mm to 1.2 mm; the thickness of the guide layer 20 is 0.2 mm to 7.5 mm; and the thickness of the heating carrier layer 30 is 0.2 mm to 4.5 mm. In this case, the guiding liquid 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0144] In some possible implementations, the first region 11 has a grammage of 40 gsm to 80 gsm; the second region 12 has a grammage of 40 gsm to 80 gsm; the flow-guiding layer 20 has a grammage of 20 gsm to 200 gsm; and the heating carrier layer 30 has a grammage of 30 gsm to 300 gsm. In this case, the guiding liquid 40 is sufficiently effective in guiding aerosol-generating substrates of varying viscosities.

[0145] Thirdly, as attached Figure 9 As shown, an embodiment of the present application provides a heating unit 60 , comprising the above-mentioned liquid-conducting body 40 and / or the liquid-conducting body 40 prepared by the above-mentioned method, and a heating element 50 .

[0146] The heating unit 60 of the embodiment of the present application includes the aforementioned liquid guide 40, which can adapt to the liquid guide requirements of aerosol generating matrices of different viscosities, thereby diversifying the application scenarios of the heating unit 60. Users can freely switch between aerosol generating matrices of different viscosities according to their needs without having to frequently replace the heating unit 60. This simplifies operation and improves the flexibility and user experience. This reduces the risk of poor liquid guide conditions for high-viscosity aerosol generating matrices and leakage for low-viscosity aerosol generating matrices caused by the addition of aerosol generating matrices of different viscosities during use, thereby increasing the service life of the heating unit 60.

[0147] In some possible implementations, within the heating unit 60 , the heating element 50 converts the aerosol-generating substrate into aerosol through resistive heating, rapidly responding to temperature changes while maintaining thermal stability. Examples of heating element 50 include metal heating wires (e.g., nickel-chromium alloys), ceramic thick-film heating sheets, and microporous heating units 60 .

[0148] In some possible implementations, the heating unit 60 further includes a supporting structure for fixing the liquid-conducting liquid 40 and the heating element 50 to ensure airtightness and prevent leakage.

[0149] Fourthly, as attached Figure 9 As shown, an embodiment of the present application provides a heating module 80 , including a liquid storage component 70 and the above-mentioned heating unit 60 .

[0150] The heating module 80 of the present embodiment includes a liquid storage assembly 70 and the aforementioned heating unit 60. The heating unit 60 can adapt to the liquid conduction requirements of aerosol-generating matrices of different viscosities, providing diverse application scenarios. Users can freely switch between aerosol-generating matrices of different viscosities based on their needs, eliminating the need for frequent replacement of the heating unit 60. This makes operation simple and the service life long. This improves the user experience flexibility and usability of the heating module 80, and also increases the service life of the heating module 80.

[0151] The heating module 80 of the embodiment of the present application is the core component of the aerosol generating device 100, responsible for heating the aerosol-generating substrate and converting it into aerosol. The liquid storage component 70 in the heating module 80 provides the "fuel" for the continuous operation of the heating module 80, namely the aerosol-generating substrate.

[0152] In some possible implementations, the liquid storage assembly 70 includes a liquid storage tank, which is connected to the heating unit 60. The permeable layer 10 of the heating unit 60 that guides the liquid 40 is close to the liquid storage tank so that the permeable layer 10 contacts the aerosol generating substrate.

[0153] The fifth aspect is as follows Figure 9 As shown, an embodiment of the present application provides an aerosol generating device 100, including a power supply component 90 and the above-mentioned heating module 80, the power supply component 90 and the heating module 80 are electrically connected and used to supply power to the heating module 80.

[0154] The aerosol generating device 100 of the present embodiment includes a power supply assembly 90 and the aforementioned heating module 80. The heating unit 60 of the heating module 80 can adapt to the liquid conduction requirements of aerosol generating substrates of different viscosities, thus diversifying the application scenarios. Users can freely switch between aerosol generating substrates of different viscosities according to their needs, and the device has a long service life. Thus, the user experience of the aerosol generating device 100 is improved, and the user experience is also extended.

[0155] In some embodiments, the aerosol generating device 100 further includes a battery control component 9191 .

[0156] In order to enable those skilled in the art to clearly understand the above-mentioned implementation details and operations of the present application, and to significantly demonstrate the improved performance of the guide liquid 40 and its preparation method and application in the embodiment of the present application, the above-mentioned technical solution is illustrated by multiple embodiments below.

[0157] Example 1 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The viscose fiber nonwoven fabric has a diameter of 277.8 μm, a thickness of 0.5 mm, and a gram weight of 45 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 102.4 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 3 layers of viscose fiber non-woven fabric; W The thickness of the non-woven fabric is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2, which is 80% cotton fiber + 20% linen fiber.

[0158] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 277.8 μm. s It is 116.8 μm.

[0159] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.3 mm and a gram weight of 75 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 102.4 μm.

[0160] 3. Preparation of heating carrier layer 30: 80% cotton fiber and 20% hemp fiber were blended and then dry-carded into a web, which was then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0161] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0162] Example 2 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The lyocell fiber nonwoven fabric has a diameter of 229.4 μm, a thickness of 0.55 mm, and a gram weight of 60 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 105.1 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 2. W The thickness of the non-woven fabric is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2, which is 80% cotton fiber + 20% linen fiber.

[0163] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 229.4 μm. s It is 116.8 μm.

[0164] 2. Preparation of the guide layer 20: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.3 mm and a gram weight of 75 gsm. Two layers are stacked to obtain the guide layer 20. The average pore size of the guide layer 20 is r d It is 105.1 μm.

[0165] 3. Preparation of heating carrier layer 30: 80% cotton fiber and 20% hemp fiber were blended and then dry-carded into a web, which was then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0166] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0167] Example 3 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The viscose fiber nonwoven fabric has a diameter of 227.8 μm, a thickness of 0.5 mm, and a gram weight of 45 gsm; the small pore area is the average pore diameter r s The lyocell fiber nonwoven fabric has an average pore size of 125.60 μm, a thickness of 0.3 mm, and a gram weight of 60 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer is 104.2 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 3 layers of 80% cotton fiber + 20% hemp fiber non-woven fabric; the average pore size of the heating carrier layer 30 is r W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0168] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.3 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 227.8 μm. s It is 125.6μm.

[0169] 2. Preparation of the guide layer 20: 80% viscose fiber and 20% cotton fiber were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 104.2μm.

[0170] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0171] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0172] Example 4 A liquid-conducting liquid 40 comprises a permeable layer 10, a flow-conducting layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises alternating large-pore regions and small-pore regions with an area ratio of 3:7, wherein the large-pore region has an average pore size of r b The viscose fiber nonwoven fabric has a diameter of 277.8 μm, a thickness of 0.5 mm, and a gram weight of 45 gsm; the small pore area is the average pore diameter r s The average pore size of the guide layer 20 is 125.6 μm, the thickness is 0.3 mm, and the weight is 60 gsm. d The average pore size of the heating carrier layer is 104.2 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 3 layers of 80% cotton fiber + 20% hemp fiber non-woven fabric; the average pore size of the heating carrier layer 30 is r W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0173] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.3 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); the large-pore non-woven fabric and the small-pore non-woven fabric are cut into widths of 3 mm and 7 mm, respectively. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 277.8 μm. s It is 125.6 μm.

[0174] 2. Preparation of the guide layer 20: 80% cotton fiber + 20% hemp fiber were mixed and then dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 104.2 μm.

[0175] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0176] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0177] Example 5 A liquid-conducting liquid 40 comprises a permeable layer 10, a flow-conducting layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises alternating large-pore regions and small-pore regions with an area ratio of 3:7, wherein the large-pore region has an average pore size of r b The viscose fiber nonwoven fabric has a diameter of 277.8 μm, a thickness of 0.5 mm, and a gram weight of 45 gsm; the small pore area is the average pore diameter r s The average pore size of the guide layer 20 is 125.6 μm, the thickness is 0.3 mm, and the weight is 60 gsm. d The average pore size of the heating carrier layer is 104.2 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 3 layers of 80% cotton fiber + 20% hemp fiber non-woven fabric; the average pore size of the heating carrier layer 30 is r WThe cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0178] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.3 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); the large-pore non-woven fabric and the small-pore non-woven fabric are cut into widths of 8 mm and 2 mm, respectively. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 277.8 μm. s It is 125.6 μm.

[0179] 2. Preparation of the guide layer 20: 80% cotton fiber + 20% hemp fiber were mixed and then dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 104.2 μm.

[0180] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0181] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0182] Example 6 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The pore size of the cotton fiber nonwoven fabric is 264.5 μm, the thickness is 0.5 mm, and the weight is 45 gsm; the small pore area is the average pore size r s The viscose fiber non-woven fabric has an average pore size of 121.4 μm, a thickness of 0.3 mm, and a gram weight of 60 gsm; the guide layer 20 has an average pore size of rd The average pore size of the heating carrier layer 30 is 102.4 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 3 layers of viscose fiber non-woven fabric; W The thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton + 20% linen fiber non-woven fabric.

[0183] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.3 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 264.5 μm. s It is 121.4 μm.

[0184] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.3 mm and a gram weight of 75 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 102.4 μm.

[0185] 3. Preparation of heating carrier layer 30: 80% cotton + 20% hemp fiber were blended and then dry-carded into a web, which was then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0186] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0187] Example 7 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r bThe viscose fiber nonwoven fabric has a diameter of 226.6 μm, a thickness of 0.45 mm, and a gram weight of 50 gsm; the small pore area is the average pore diameter r s The average pore size of the guide layer 20 is 145.6 μm, the thickness is 0.45 mm, and the weight is 75 gsm. d The average pore size of the heating carrier layer 30 is 116.8 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 3 layers of viscose fiber non-woven fabric; W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0188] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.45 mm and a gram weight of 50 gsm (for preparing the first region 11, i.e., the large-pore region); cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.45 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 226.6 μm. s It is 145.6 μm.

[0189] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 116.8 μm.

[0190] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0191] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0192] Example 8 A liquid guide 40, as shown in the attached Figure 1As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The pore size of the cotton fiber nonwoven fabric is 164.8 μm, the thickness is 0.4 mm, and the weight is 60 gsm; the small pore area is the average pore size r s The viscose fiber non-woven fabric has an average pore size of 98.1 μm, a thickness of 0.25 mm, and a gram weight of 60 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 3 layers of 80% cotton fiber + 20% hemp fiber non-woven fabric; the average pore size of the heating carrier layer 30 is r W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0193] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.4 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 164.8 μm. s It is 98.1 μm.

[0194] 2. Preparation of the guide layer 20: 80% cotton fiber + 20% hemp fiber are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Three layers are stacked to obtain the guide layer 20. The average pore size of the guide layer 20 is r d It is 83.3 μm.

[0195] 3. Preparation of heating carrier layer 30: Cotton fibers are blended and then dry-carded into a web, which is then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0196] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0197] Example 9 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The lyocell fiber nonwoven fabric has a diameter of 229.4 μm, a thickness of 0.55 mm, and a gram weight of 60 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 98.1 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 2 layers of viscose fiber non-woven fabric; W The thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton fiber + 20% linen fiber non-woven fabric.

[0198] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 229.4 μm. s It is 116.8 μm.

[0199] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Two layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 98.1 μm.

[0200] 3. Preparation of heating carrier layer 30: 80% cotton fiber + 20% hemp fiber were blended and then dry-carded into a web, and then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0201] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0202] Example 10 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The lyocell fiber nonwoven fabric has a diameter of 229.4 μm, a thickness of 0.55 mm, and a gram weight of 60 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 98.1 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 2 layers of viscose fiber non-woven fabric; W The thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton fiber + 20% linen fiber non-woven fabric.

[0203] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 2 mm * 2 mm squares as shown in FIG. Figure 3 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 229.4 μm. s It is 116.8 μm.

[0204] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Two layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 98.1 μm.

[0205] 3. Preparation of heating carrier layer 30: 80% cotton fiber + 20% hemp fiber were blended and then dry-carded into a web, and then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0206] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0207] Example 11 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The lyocell fiber nonwoven fabric has a diameter of 229.4 μm, a thickness of 0.55 mm, and a gram weight of 60 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 98.1 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 2 layers of viscose fiber non-woven fabric; W The thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton fiber + 20% linen fiber non-woven fabric.

[0208] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut as follows: Figure 4 As shown, the permeable layer 10 is obtained. Among them, the average pore size r of the large pore areab The average pore size of the small pore area is 229.4 μm. s It is 116.8 μm.

[0209] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Two layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 98.1 μm.

[0210] 3. Preparation of heating carrier layer 30: 80% cotton fiber + 20% hemp fiber were blended and then dry-carded into a web, and then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0211] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0212] Example 12 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The lyocell fiber nonwoven fabric has a diameter of 229.4 μm, a thickness of 0.55 mm, and a gram weight of 60 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 98.1 μm, the thickness of the single layer is 0.25 mm, the weight is 60 gsm, and the number of layers is 2 layers of viscose fiber non-woven fabric; W The thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton fiber + 20% linen fiber non-woven fabric.

[0213] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut as follows: Figure 5 As shown, the permeable layer 10 is obtained. Among them, the average pore size r of the large pore area b The average pore size of the small pore area is 229.4 μm. s It is 116.8 μm.

[0214] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 98.1 μm.

[0215] 3. Preparation of heating carrier layer 30: 80% cotton fiber + 20% hemp fiber were blended and then dry-carded into a web, and then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0216] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0217] Comparative Example 1 A liquid guide 40, as shown in the attached Figure 7 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 has an average pore size of r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 102.4 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 3 layers of viscose fiber non-woven fabric; W The thickness of the non-woven fabric is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2, which is 80% cotton fiber + 20% linen fiber.

[0218] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: The viscose fiber is dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a web with a thickness of 0.35 mm, a weight of 75 gsm, and an average pore size of r b The nonwoven fabric with a thickness of 116.8 μm is the permeable layer 10 .

[0219] 2. Preparation of the guide layer 20: The viscose fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.3 mm and a gram weight of 75 gsm. Three layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 102.4μm.

[0220] 3. Preparation of heating carrier layer 30: 80% viscose fiber and 20% cotton fiber were blended and then dry-carded into a web, which was then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3μm.

[0221] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0222] Comparative Example 2 A liquid guide 40, as shown in the attached Figure 8 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 has an average pore size of r d The average pore size of the guide layer 20 is r d The average pore size of the heating carrier layer 30 is 105.1 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 2. W The thickness of the non-woven fabric is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2, which is 80% cotton fiber + 20% linen fiber.

[0223] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Lyocell fibers are dry-carded into a web, and then reinforced by hydroentanglement to obtain a web with a thickness of 0.55 mm, a weight of 60 gsm, and an average pore size of r s The nonwoven fabric with a thickness of 229.4 μm is the permeable layer 10 .

[0224] 2. Preparation of the guide layer 20: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.3 mm and a gram weight of 75 gsm. Three layers are stacked to obtain the guide layer 20. The average pore size of the guide layer 20 is r d It is 105.1μm.

[0225] 3. Preparation of heating carrier layer 30: 80% viscose fiber and 20% cotton fiber were blended and then dry-carded into a web, which was then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3μm.

[0226] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0227] Comparative Example 3 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The viscose fiber nonwoven fabric has a diameter of 277.8 μm, a thickness of 0.5 mm, and a gram weight of 45 gsm; the small pore area is the average pore diameter r s The viscose fiber nonwoven fabric has an average pore size of 116.8 μm, a thickness of 0.35 mm, and a gram weight of 75 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 145.6 μm, the thickness of the single layer is 0.3 mm, the weight is 75 gsm, and the number of layers is 3 layers of cotton fiber non-woven fabric; W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0228] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.5 mm and a gram weight of 45 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.35 mm and a gram weight of 75 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area isb The average pore size of the small pore area is 277.8 μm. s It is 116.8 μm.

[0229] 2. Preparation of the guide layer 20: The cotton fibers were dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.45 mm and a gram weight of 75 gsm. Two layers were stacked to obtain the guide layer 20. The average pore size of the guide layer 20 was r d It is 145.6 μm.

[0230] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0231] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0232] Comparative Example 4 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The pore size of the cotton fiber nonwoven fabric is 164.8 μm, the thickness is 0.4 mm, and the weight is 60 gsm; the small pore area is the average pore size r s The viscose fiber non-woven fabric has an average pore size of 98.1 μm, a thickness of 0.25 mm, and a gram weight of 60 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is r W The cotton fiber non-woven fabric has a thickness of 78.5 μm, a single layer thickness of 0.25 mm, a gram weight of 75 gsm, and a number of layers of 2.

[0233] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.4 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 164.8 μm. s It is 98.1 μm.

[0234] 2. Preparation of the guide layer 20: Lyocell fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.55 mm and a gram weight of 60 gsm. Two layers are stacked to obtain the guide layer 20. The average pore size of the guide layer 20 is r d It is 229.4μm.

[0235] 3. Preparation of heating carrier layer 30: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain a heating carrier layer 30. The average pore size of the heating carrier layer 30 is r W is 78.5 μm.

[0236] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0237] Comparative Example 5 A liquid guide 40, as shown in the attached Figure 1 As shown, the invention comprises a permeable layer 10, a guide layer 20 and a heating carrier layer 30 stacked in sequence; wherein the permeable layer 10 comprises a large pore area and a small pore area alternately arranged with an area ratio of 1:1, and the large pore area has an average pore size of r b The pore size of the cotton fiber nonwoven fabric is 164.8 μm, the thickness is 0.4 mm, and the weight is 60 gsm; the small pore area is the average pore size r s The viscose fiber non-woven fabric has an average pore size of 98.1 μm, a thickness of 0.25 mm, and a gram weight of 60 gsm; the guide layer 20 has an average pore size of r d The average pore size of the heating carrier layer 30 is 78.5 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of cotton fiber non-woven fabric; WThe thickness of the single layer is 83.3 μm, the thickness of the single layer is 0.25 mm, the weight is 75 gsm, and the number of layers is 2 layers of 80% cotton fiber + 20% linen fiber non-woven fabric.

[0238] Its preparation comprises the steps of: 1. Preparation of permeable layer 10: Cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a large-pore non-woven fabric with a thickness of 0.4 mm and a gram weight of 60 gsm (for preparing the first region 11, i.e., the large-pore region); viscose fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a small-pore non-woven fabric with a thickness of 0.25 mm and a gram weight of 60 gsm (for preparing the second region 12, i.e., the small-pore region); both non-woven fabrics are cut into 5 mm widths as shown in FIG. Figure 2 The layers are placed alternately as shown to obtain a permeable layer 10. Among them, the average pore size r of the large pore area is b The average pore size of the small pore area is 164.8 μm. s It is 98.1 μm.

[0239] 2. Preparation of the guide layer 20: The cotton fibers are dry-carded into a web, and then reinforced by a hydroentanglement process to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers are stacked to obtain the guide layer 20. The average pore size of the guide layer 20 is r d is 78.5 μm.

[0240] 3. Preparation of heating carrier layer 30: 80% cotton fiber + 20% hemp fiber were blended and then dry-carded into a web, and then reinforced by hydroentanglement to obtain a non-woven fabric with a thickness of 0.25 mm and a gram weight of 75 gsm. Two layers were stacked to obtain heating carrier layer 30. The average pore size of heating carrier layer 30 was r W It is 83.3 μm.

[0241] 4. Stack the permeable layer 10, the fluid guide layer 20, and the heating carrier layer 30 in sequence to obtain a liquid guide 40. Cut the liquid guide 40 to a size of 100 mm in length and 100 mm in width, and perform a liquid penetration test.

[0242] The parameters of each functional layer in the above embodiments and comparative examples are shown in Table 1 below:

[0243]

[0244]

[0245] In order to verify the progress of the embodiments of the present application, the following performance tests were performed on the above embodiments and comparative examples respectively: 1. High-viscosity aerosol-generating matrix penetration test: A high-viscosity aerosol-generating matrix with a mass ratio of glycerin (VG) to propylene glycol (PG) of 7:3 was used as the aerosol-generating matrix. The penetration ability of the aerosol-generating matrix in the conductive liquid 40 was tested in accordance with GB / T 24218.8-2010, Test Methods for Nonwoven Fabrics. Prior to testing, the aerosol-generating matrix must be equilibrated for 24 hours in accordance with GB / T 6529, Textile Humidification and Test Standard Atmosphere.

[0246] 2. Low-viscosity aerosol-generating matrix penetration test: A low-viscosity aerosol-generating matrix composed of glycerin (VG) and propylene glycol (PG) in a 1:1 mass ratio was used to test the penetration of the aerosol-generating matrix in a liquid-conducting medium (40 μm) in accordance with GB / T 24218.8-2010, Test Methods for Nonwovens. Prior to testing, the aerosol-generating matrix was subjected to 24-hour equilibration in accordance with GB / T 6529, Textile Humidification and Test Standard Atmosphere.

[0247] The test results are shown in Table 2 below:

[0248] It should be noted that, based on a normal puff time of 2 seconds, low-power heaters (resistance ≥ 0.6Ω) must meet 10uL / puff, and high-power heaters (resistance < 0.6Ω) must meet 15uL / puff. When the liquid guide 40 is adapted for low-power heaters, at flow rates < 5uL / s, the wick may become sticky during continuous puffing. When the liquid guide 40 is adapted for high-power heaters, at flow rates < 7.0uL / s, the wick may become sticky during continuous puffing.

[0249] In addition, for low-viscosity aerosol-generating matrices, the surface tension between the matrix and the liquid-conducting agent 40 is relatively high, resulting in weaker adhesion to the aerosol-generating matrix. High flow rates can easily lead to incomplete atomization or even leakage. Therefore, low-viscosity aerosol-generating matrices typically have a flow rate of 5uL / s to 18uL / s, while high-viscosity aerosol-generating matrices typically have a flow rate of 7.0uL / s to 15uL / s. In this case, both low-viscosity aerosol-generating matrices and high-viscosity aerosol-generating matrices are compatible with both low-power and high-power heating elements. In actual applications, the liquid-conducting agent 40 can be adapted to an appropriate flow rate based on the power of the heating element to ensure a better aerosol generation effect.

[0250] From the above test results, it can be seen that the liquid-conducting liquid 40 provided in Examples 1 to 12 of the present application passes through the permeable layer 10 in which large-aperture areas and small-aperture areas are alternately arranged, and the flow rate for the high-viscosity aerosol-generating matrix is ​​7.42uL / s~12.97uL / s, and the flow rate for the low-viscosity aerosol-generating matrix is ​​11.89uL / s~15.94uL / s. It can be seen that the liquid-conducting liquid 40 in the embodiment of the present application has a high liquid flow-conducting and penetration ability for both low-viscosity and high-viscosity aerosol-generating matrices, which can effectively ensure the aerosol generation effect and avoid the core-burning phenomenon. Moreover, it can be adapted to both low-power heating elements and high-power heating elements. For example, when the flow rate of the liquid-conducting liquid 40 for the high-viscosity aerosol-generating matrix is ​​low, it can be applied to low-power heating elements, and when the flow rate of the liquid-conducting liquid 40 for the high-viscosity aerosol-generating matrix is ​​high, it can be applied to high-power heating elements.

[0251] In Examples 1 to 3, the permeable layer 10 is made of large-pore regions and small-pore regions of different materials and pore sizes, and is alternately arranged, and exhibits high liquid penetration capabilities for both low-viscosity and high-viscosity atomized liquids.

[0252] Comparison of Example 1, Example 4, and Example 5 shows that, given comparable functional layer materials, pore diameters, thicknesses, and weights, increasing the proportion of small-pore regions in Example 4 reduces the penetration rate of low-viscosity and high-viscosity aerosol-generating substrates to a certain extent. However, increasing the proportion of large-pore regions in Example 5 improves the penetration rate of low-viscosity and high-viscosity aerosol-generating substrates to a certain extent.

[0253] Comparing Examples 1 and 6-9 reveals that by appropriately adjusting the pore sizes of the permeable layer 10, the guide layer 20, and the heating carrier layer 30, and by varying the pore size differences between the permeable layer 10 and the guide layer 20, as well as the pore size differences between the guide layer 20 and the heating carrier layer 30, the penetration rate of the guiding liquid 40 through low-viscosity and high-viscosity aerosol-forming substrates can be flexibly adjusted. In Example 9, the relatively large pore size difference between the permeable layer 10, the guide layer 20, and the heating carrier layer 30 enables the guiding liquid 40 to achieve a more sustained wicking effect for both low-viscosity and high-viscosity aerosol-forming substrates.

[0254] By comparing Example 1 and Examples 10 to 12, it can be seen that the alternating arrangement of large-aperture areas and small-aperture areas in the permeable layer 10 can be designed in a diversified manner, and both exhibit good diversion effects on low-viscosity and high-viscosity aerosol-generating matrices.

[0255] The results of Example 1 and Comparative Example 1 demonstrate that, in a high-viscosity aerosol-generating matrix (VG:PG = 7:3), the compounding of regions of varying average pore sizes in the permeable layer 10 of the liquid-guiding liquid 40 in Example 1 significantly enhances the aerosol-generating matrix's penetration. In a low-viscosity aerosol-generating matrix (VG:PG = 1:1), Comparative Example 1 utilizes wicking action through the small pores, resulting in a faster transfer rate. In Example 1, the large pores directly wicking into the liquid-guiding layer 20 are less effective. Aerosol-generating matrix penetrating the large pore regions must be transferred within the permeable layer 10 by wicking action through the small pores before sustained wicking occurs in the liquid-guiding layer 20, thus reducing the liquid transfer rate to a certain extent.

[0256] The results of Example 2 and Comparative Example 2 demonstrate that, in a high-viscosity aerosol-generating matrix (VG:PG = 7:3), the permeable layer 10 in the liquid-conducting liquid 40 of Example 1 of the present application, composed of regions with varying average pore sizes, enhances the ability to penetrate the aerosol-generating matrix. In a low-viscosity aerosol-generating matrix (VG:PG = 1:1), since the permeable layer 10 of Comparative Example 2 consists entirely of large-pore regions, the low-viscosity aerosol-generating matrix can pass directly through, resulting in a rapid flow diversion rate for the low-viscosity aerosol-generating matrix. However, this also increases the risk of leakage.

[0257] From the results of Example 1 and Comparative Example 3, it can be seen that when the pore size of the guide layer 20 is larger than the pore size of the small pore area in the permeable layer 10, the guide effect on the high-viscosity aerosol-generating substrate will be significantly reduced.

[0258] From the results of Example 1 and Comparative Example 4, it can be seen that when the pore size of the guide layer 20 is larger than the pore size of the macroporous region in the permeable layer 10, the guide effect for both low-viscosity and high-viscosity aerosol-generating substrates is poor.

[0259] From the results of Example 1 and Comparative Example 5, it can be seen that when the pore size of the heating carrier layer 30 is larger than the pore size of the guide layer 20, the transmission and guide of the low-viscosity and high-viscosity aerosol generating substrates will be seriously hindered.

[0260] In summary, the permeable layer 10 with alternating large and small pore regions in the liquid-guiding liquid 40 of the present embodiment has high liquid penetration for both low-viscosity and high-viscosity aerosol-generating substrates, preventing the occurrence of poor liquid conduction and resulting core sticking in high-viscosity aerosol-generating substrates, while also preventing leakage in low-viscosity aerosol-generating substrates. In contrast, the liquid-guiding liquid 40 in Comparative Examples 1-2 does not utilize a permeable layer 10 with alternating large and small pore regions, but rather utilizes a single large-pore permeable layer 10 or a single small-pore permeable layer 10. This not only results in a single treatment effect on the aerosol-generating substrate and is unable to adapt to aerosol-generating substrates of varying viscosities, but also easily causes leakage in aerosol-generating substrates with excessively low viscosities due to excessively rapid conduction.

[0261] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A liquid-conducting body, characterized in that: It includes a permeable layer, a guide layer and a heating carrier layer stacked in sequence; wherein, The transmission layer has a plurality of regions with different average pore sizes distributed along the plane direction, and the average pore sizes of two adjacent regions are different; The average pore size of the pores in the guide layer is less than or equal to the average pore size of the smallest pore area in the permeable layer; The average pore size of the pores in the heating carrier layer is smaller than or equal to the average pore size of the pores in the guide layer.

2. The liquid-conducting material according to claim 1, wherein: The permeable layer includes a plurality of adjacent first and second regions along a planar direction, and the average pore sizes of the two adjacent regions are different, the average pore size of the pores in the first region is larger than the average pore size of the pores in the second region; the average pore size of the pores in the guide layer is smaller than or equal to the average pore size of the pores in the second region.

3. The liquid-conducting material according to claim 2, wherein: Taking the total area of ​​the transmissive layer in the plane direction as 100%, the area of ​​the first region accounts for 30% to 80%, and the area of ​​the second region accounts for 20% to 70%.

4. The liquid-conducting member according to claim 2 or 3, wherein: The average pore size of the first region is 130 μm to 300 μm; And / or, the average pore size of the second region is 50 μm to 130 μm.

5. The liquid-conducting material according to claim 4, wherein: The average pore size of the guide layer is 40 μm to 120 μm; And / or, the average pore size of the guide layer is 5 μm to 30 μm smaller than the average pore size of the second region.

6. The liquid-conducting material according to claim 5, wherein: The average pore size of the heating carrier layer is 40 μm to 100 μm; And / or, the average pore size of the heating carrier layer is 5 μm to 30 μm smaller than the average pore size of the guide layer.

7. The liquid-conducting material according to any one of claims 2 to 3 or 5 to 6, wherein: The weight of the transparent layer is 15gsm~150gsm; And / or, the guide layer has a grammage of 20 gsm to 200 gsm; And / or, the heating carrier layer has a gram weight of 30 gsm to 300 gsm.

8. The liquid-conducting material according to claim 7, wherein: The first region has a grammage of 40 gsm to 80 gsm; And / or, the grammage of the second region is 40gsm~80gsm.

9. The liquid-conducting material according to any one of claims 2 to 3, 5 to 6 or 8, characterized in that: The thickness of the transparent layer is 0.2mm~3mm; And / or, the guide layer has a thickness of 0.2 mm to 7.5 mm; And / or, the thickness of the heating carrier layer is 0.2 mm to 4.5 mm.

10. The liquid-conducting material according to claim 9, wherein: The thickness of the first region is 0.2 mm to 1.8 mm; And / or, the thickness of the second region is 0.2 mm to 1.2 mm.

11. The liquid-conducting material according to any one of claims 2 to 3, 5 to 6, 8 or 10, wherein: In the transmission layer, the distribution form of the first region and the second region includes at least one of alternating distribution, checkerboard distribution, random discrete distribution, and clumping distribution.

12. The liquid-conducting material according to any one of claims 1 to 3, 5 to 6, 8 or 10, wherein: The material of the permeable layer includes at least one of natural cellulose fiber, natural protein fiber, regenerated cellulose fiber, and synthetic fiber; And / or, the material of the guide layer includes at least one of natural cellulose fiber, natural protein fiber, regenerated cellulose fiber, and synthetic fiber; And / or, the material in the heating carrier layer includes at least one of natural cellulose fiber, regenerated cellulose fiber, and synthetic fiber.

13. The liquid-conducting material according to claim 12, wherein: The natural cellulose fiber includes at least one of cotton fiber, hemp fiber, coconut shell fiber, wood pulp fiber, and bamboo fiber; And / or, the natural protein fiber includes at least one of wool fiber and silk fiber And / or, the regenerated cellulose fiber includes at least one of viscose fiber, lyocell fiber, modal fiber, and cupro fiber; And / or, the synthetic fiber includes at least one of polyethylene terephthalate fiber, polypropylene fiber, polyamide fiber, and polylactic acid fiber; And / or, the material of the heating carrier layer includes at least one special fiber selected from the group consisting of poly(m-phenylene-m-phthalamide) fiber, polytetrafluoroethylene fiber, polybenzimidazole fiber, and silicate-based viscose fiber.

14. A method for preparing a liquid conductor, characterized in that: The following steps are involved: preparing a transmission layer, wherein the transmission layer has a plurality of regions with different average pore sizes distributed along a plane direction, and the average pore sizes of two adjacent regions are different; preparing a guide layer, wherein the average pore size of the pores in the guide layer is less than or equal to the average pore size of the smallest pore area in the permeable layer; preparing a heating carrier layer, wherein the average pore size of the pores in the heating carrier layer is smaller than or equal to the average pore size of the pores in the guide layer; The permeable layer, the fluid-guiding layer and the heating carrier layer are stacked and combined in sequence to obtain a fluid-guiding layer.

15. The method for preparing a liquid-conducting agent according to claim 14, wherein: The preparation processes of the permeable layer, the guide layer and the heating carrier layer respectively and independently include: forming the fibers into a web by dry laying and / or wet laying, and then reinforcing them by hydroentangling and / or needle punching.

16. The method for preparing a liquid-conducting agent according to claim 14 or 15, wherein: The preparation step of the permeable layer includes: preparing a plurality of first regions and a second region respectively, and arranging the first regions and the second regions alternately and adjacently along a plane direction of the permeable layer to form the permeable layer, wherein the average pore size of the pores in the first region is larger than the average pore size of the pores in the second region; and the average pore size of the pores in the guide layer is smaller than or equal to the average pore size of the pores in the second region.

17. The method for preparing a liquid-conducting agent according to claim 16, wherein: Taking the total area of ​​the transmissive layer in the plane direction as 100%, the area of ​​the first region accounts for 30% to 80%, and the area of ​​the second region accounts for 20% to 70%; And / or, the average pore size of the first region is 130 μm to 300 μm; the average pore size of the second region is 50 μm to 130 μm; the average pore size of the guide layer is 40 μm to 120 μm; and the average pore size of the heating carrier layer is 40 μm to 100 μm; And / or, the thickness of the first region is 0.2 mm to 1.8 mm; the thickness of the second region is 0.2 mm to 1.2 mm; the thickness of the guide layer is 0.2 mm to 7.5 mm; and the thickness of the heating carrier layer is 0.2 mm to 4.5 mm; And / or, the gram weight of the first area is 40gsm~80gsm; the gram weight of the second area is 40gsm~80gsm; the gram weight of the guide layer is 20gsm~200gsm; and the gram weight of the heating carrier layer is 30gsm~300gsm.

18. A heating unit, characterized in that: The invention comprises the liquid-conducting body according to any one of claims 1 to 13 and / or the liquid-conducting body prepared by the method according to any one of claims 14 to 17, and a heating element.

19. A heating module, characterized in that: It comprises a liquid storage component and the heating unit as claimed in claim 18.

20. An aerosol generating device, characterized in that: It comprises a power supply component and the heating module as claimed in claim 19, wherein the power supply component is electrically connected to the heating module and is used to supply power to the heating module.

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