Foamed bamboo material and preparation method therefor, aerosol-generating substrate segment, and aerosol-generating article

Abstract

Disclosed in embodiments of the present application are a foamed bamboo material and a preparation method therefor, an aerosol-generating substrate segment, and an aerosol-generating article. The aerosol-generating substrate segment comprises a substrate unit; the substrate unit comprises a medium carrier and a load; the medium carrier is used for carrying the load; the load at least comprises an aerosol-generating agent; the medium carrier is made of a pretreated natural bamboo material; and the interior of the natural bamboo material has a plurality of natural pores. The natural bamboo material is a naturally porous material, i.e., the medium carrier made of the natural bamboo material has high porosity and numerous natural pores, such that the medium carrier has relatively good adsorption performance and thus can adsorb a larger amount of the load; additionally, the natural pores can also increase the surface area of the substrate unit, and an aerosol generated by the substrate unit can be rapidly and fully released through the natural pores, thereby effectively improving the high loading of active substances in the aerosol-generating substrate segment, and also facilitating an increase in an aerosol generation amount.

Description

Foamed bamboo material and preparation method thereof, aerosol generating substrate segment, and aerosol generating article

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority from Chinese Patent Application No. 202411104621.4 filed on August 12, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of smoking articles, in particular to a foamed bamboo material and a preparation method thereof, an aerosol generating substrate segment, and an aerosol generating article. BACKGROUND

[0004] The aerosol generating substrate segment can form an aerosol by ignition or by heating without combustion (HNB). In the aerosol generating substrate segment by heating without combustion, the aerosol generating substrate segment is heated by an external heat source to just a degree sufficient to emit an aerosol, and the aerosol generating substrate segment does not burn, and by loading a smoking agent, the smoking agent is released to form an aerosol by heating the aerosol generating substrate segment when in use.

[0005] In related technologies, the forms of the aerosol generating substrate segment mainly include a sheet type and a granular type. The processing technology of such aerosol generating substrate segments of different forms determines that the internal structure of the finished substrate unit is difficult to have a rich and diverse pore structure, and the substrate unit of the corresponding form can only be prepared by processing through specific equipment. The aerosol generating substrate segment of the sheet type structure can achieve high loading of effective substances, but the overall form of the aerosol generating substrate segment is relatively dense, and has no fixed pore structure, which leads to the inability to quickly generate an aerosol when heated. The aerosol generating substrate segment of the granular structure has irregular pores inside, but it is difficult to achieve high loading of effective substances, which leads to a limited amount of generated aerosol. SUMMARY

[0006] Therefore, the embodiments of the present application aim to provide a foamed bamboo material and a preparation method thereof, an aerosol generating substrate segment, and an aerosol generating article, which can effectively improve the high loading of effective substances by the aerosol generating substrate segment, and also facilitate the increase of the amount of generated aerosol.

[0007] To achieve the above object, the technical solutions of the embodiments of the present application are as follows:

[0008] The embodiment of the present application provides an aerosol generating substrate section, which comprises substrate units, the substrate units comprise a medium carrier and a load, the medium carrier is used for loading the load, the load at least comprises an aerosol generating agent, the material of the medium carrier is pretreated natural bamboo, and the natural bamboo has a plurality of natural pores inside.

[0009] In an implementation form, the ratio of the weight of the load to the weight of the medium carrier is 0.1-30; and / or,

[0010] The density of the substrate unit is 50 mg / cm 3 -1000 mg / cm 3 .

[0011] In an implementation form, the pore diameter of the natural pores is 0.1-2 cm; and / or,

[0012] The porosity of the substrate unit is 35%-98%; and / or,

[0013] The thermal conductivity coefficient of the substrate unit is 0.03-0.3 W / m.k.

[0014] In an implementation form, the load further comprises at least one of a plant component, an adhesive component, a flavor component and a nicotine component.

[0015] In an implementation form, the number of the substrate units is multiple, and the aerosol generating substrate section further comprises a packaging layer, the packaging layer is wound to form a containing space, and all the substrate units are contained in the containing space.

[0016] In an implementation form, the filling rate of the aerosol generating substrate section is 40%-100%.

[0017] In an implementation form, at least part of the substrate units are arranged in parallel into a bundle along a first direction; and / or, at least part of the substrate units are stacked along the first direction.

[0018] The embodiment of the present application provides an aerosol generating substrate section, which comprises substrate units, the substrate units comprise a medium carrier and a load, the medium carrier is used for loading the load, the load at least comprises an aerosol generating agent, the material of the medium carrier is pretreated natural bamboo, and the natural bamboo has a plurality of natural pores inside.

[0019] In one implementation, the medium carrier is bamboo material containing the natural gas pores extending along a length direction of the aerosol generating substrate segment.

[0020] In one implementation, the medium carrier includes at least one of bamboo, wood, kudzu, wisteria, lonicera japonica, grapevine, milkvetch root, codonopsis root, rush stem, water onion stem, sugarcane, corn, sorghum, and reed.

[0021] In one implementation, the load further includes at least one of essence, spice, nicotine, herbal powder, herbal extract, herbal extract, tobacco powder, tobacco extract, and tobacco extract.

[0022] In one implementation, the load further includes herbal extract including at least one of mint extract, liquorice extract, chrysanthemum extract, monk fruit extract, ginger extract, chamomile extract, tea extract, lavender extract, cocoa extract, loquat leaf extract, and cinnamon extract; and / or,

[0023] The load includes tobacco extract including at least one of tobacco water extract, tobacco alcohol extract, tobacco supercritical CO2 extract, and tobacco enzymatic extract.

[0024] In one implementation, the medium carrier has a porosity in a range of 50% to 98%; and / or,

[0025] The medium carrier has a density in a range of 0.05 g / cm 3 to 0.3 g / cm 3 .

[0026] In one implementation, the medium carrier has a porosity in a range of 80% to 95%; and / or,

[0027] The medium carrier has a density in a range of 0.1 g / cm 3 to 0.24 g / cm 3 .

[0028] In one implementation, an average equivalent diameter of all the airflow passages having an equivalent diameter greater than or equal to 10 μm is in a range of 0.05 mm to 0.8 mm.

[0029] In one implementation, the aerosol generating substrate segment has a diameter in a range of 4 mm to 15 mm; and / or,

[0030] The aerosol generating substrate segment has a length dimension in a range of 5 mm to 60 mm.

[0031] In one embodiment, more than 90% of the airflow passages have an equivalent diameter in the range of 1 pm to 2 mm.

[0032] In one embodiment, the average equivalent diameter of all the airflow passages having an equivalent diameter greater than or equal to 0.01 mm is in the range of 0.05 mm to 0.5 mm across the cross-section of the aerosol- generating substrate segment; and / or,

[0033] In one embodiment, the average equivalent diameter of all the airflow passages having an equivalent diameter greater than or equal to 0.01 mm is in the range of 0.01 mm to 0.05 mm across the axial cross-section of the aerosol-generating substrate segment.

[0034] In one embodiment, the density of the substrate unit is in the range of 0.4 g / cm3to 1.2 g / cm3; and / or,

[0035] The porosity of the substrate unit is in the range of 20% to 90%.

[0036] In one embodiment, the thermal conductivity of the aerosol-generating substrate segment is in the range of 0.1 W / m.k to 0.3 W / m.k; and / or,

[0037] The specific heat capacity of the aerosol-generating substrate segment is in the range of 1.0 kJ / (kg.K) to 3.8 kJ / (kg.K).

[0038] In one embodiment, the elastic recovery of the substrate unit is in the range of 76% to 98%; and / or,

[0039] The hardness of the substrate unit is in the range of 70% to 95%.

[0040] In one embodiment, the tensile strength of the substrate unit in the first direction is in the range of 1 kN / m to 8 kN / m; and / or,

[0041] The tensile strength of the substrate unit in a direction perpendicular to the first direction is in the range of 0.05 kN / m to 3 kN / m.

[0042] In one embodiment, the medium carrier is in a cylindrical structure, and the aerosol-generating substrate segment is formed by a single medium carrier.

[0043] In one embodiment, the ratio of the sum of the cross-sectional areas of all the airflow passages having an equivalent diameter in the range of 0.01 mm to 0.3 mm to the cross-sectional area of the medium carrier is in the range of 10% to 60% in a cross-section perpendicular to the first direction.

[0044] In an embodiment, the medium carriers are in a columnar structure, and the segment of the aerosol generating substrate is formed by gathering a plurality of the medium carriers.

[0045] In an embodiment, the number of the medium carriers is in a range from 2 to 30; and / or,

[0046] The shape of the cross section of the medium carrier includes at least one of a circle, a semi-circle, an ellipse, a regular polygon, an irregular polygon, and a sector.

[0047] In an embodiment, the diameter of each of the medium carriers is in a range from 0.05 mm to 5 mm.

[0048] In an embodiment, the medium carriers are in a sheet structure, and the segment of the aerosol generating substrate is formed by winding or folding at least one of the medium carriers.

[0049] In an embodiment, the thickness of the medium carrier is in a range from 0.5 mm to 3 mm.

[0050] In an embodiment, the size of the medium carrier in the first direction is in a range from 10 mm to 150 mm; and / or,

[0051] The size of the medium carrier in a second direction is in a range from 24 mm to 354 mm, wherein the second direction is orthogonal to the first direction and the thickness direction of the medium carrier.

[0052] In an embodiment, the segment of the aerosol generating substrate includes at least two substrate units, the at least two substrate units including a first substrate unit and a second substrate unit, the first substrate unit being formed by the medium carriers in a columnar structure, and the second substrate unit being formed by winding or folding at least one of the medium carriers in a sheet structure.

[0053] In an embodiment, the equivalent diameter of the airflow passage gradually increases from the distal lip end of the segment of the aerosol generating substrate to the proximal lip end of the segment of the aerosol generating substrate; and / or,

[0054] In an embodiment, the equivalent diameter of each of the airflow passages gradually increases or decreases from the inside to the outside along the radial direction of the segment of the aerosol generating substrate on the same cross section of the segment of the aerosol generating substrate.

[0055] In an embodiment, the segment of the aerosol generating substrate has a high-load area and a low-load area on the cross section of the segment of the aerosol generating substrate, and the low-load area is arranged at the outer periphery of the high-load area; and / or,

[0056] A loose area is arranged at the axis of the segment of the aerosol generating substrate.

[0057] In an embodiment, the aerosol generating substrate segment is provided with a heating hole for inserting a heating assembly.

[0058] In an embodiment, the heating hole has a circular or "cross" shape in cross section.

[0059] The embodiment of the present application provides a foamed bamboo material, the foamed bamboo material is formed by natural bamboo material, the foamed bamboo material has a plurality of natural pores extending along a first direction, an average pore diameter of all the natural pores with an equivalent diameter greater than or equal to 10 microns is in a range of 0.05 mm to 0.8 mm, a density of the foamed bamboo material is in a range of 0.05 g / cm 3 to 0.3 g / cm 3 , and a porosity of the foamed bamboo material is greater than or equal to 50%.

[0060] The embodiment of the present application provides a preparation method of a foamed bamboo material, comprising:

[0061] Preparation of bamboo pieces;

[0062] Placing the bamboo pieces in a cooking liquid for cooking;

[0063] Freezing the cooked bamboo pieces;

[0064] Soaking the frozen bamboo pieces in a foaming liquid;

[0065] Foaming the soaked bamboo pieces to obtain foamed bamboo material.

[0066] The embodiment of the present application provides an aerosol generating article, comprising:

[0067] An aerosol generating substrate segment, the aerosol generating substrate segment comprises the foamed bamboo material in the above embodiment, or the aerosol generating substrate segment comprises the foamed bamboo material prepared by the preparation method in the above embodiment, and the foamed bamboo material at least loads a load material capable of generating aerosol.

[0068] The embodiment of the present application provides an aerosol generating article, comprising:

[0069] The aerosol generating substrate segment in any one of the above embodiments, the aerosol generating substrate segment extends along a first direction;

[0070] A functional segment, the functional segment is arranged at one end of the aerosol generating substrate segment along the first direction, the functional segment comprises a cooling segment and a filter segment, and the cooling segment is located between the filter segment and the aerosol generating substrate segment;

[0071] An outer wrapping layer, the outer wrapping layer is wrapped on an outer circumferential side of the functional segment and the aerosol generating substrate segment.

[0072] In an embodiment, the aerosol generating article further comprises a front plug section, the front plug section being arranged at one end of the aerosol generating substrate section away from the functional section in the first direction,

[0073] The front plug section is a hollow tube structure; and / or,

[0074] The front plug section is made of a gas permeable material.

[0075] In an embodiment, the material of the cooling section and / or the filter section is bamboo.

[0076] The aerosol generating substrate section of the embodiment of the present application, the substrate unit of the aerosol generating substrate section comprises a medium carrier and a load, the medium carrier is used to load the load, and the aerosol generating agent in the load generates aerosol after heating for the user to use. The material of the medium carrier is natural bamboo, which is a kind of natural porous material, that is, the medium carrier made of natural bamboo itself has high porosity and a large number of natural pores, and the natural pores extend from one end of the aerosol generating substrate section to the opposite end, forming a natural airflow channel, and the adsorption performance is relatively good, so that more loads can be adsorbed, and high loading of effective substances can be achieved. At the same time, the natural pores can also increase the surface area of the substrate unit, the aerosol generated by the heated substrate unit can enter the airflow channel, and the aerosol released by the load exposed to the natural pores (i.e. the load on the inner wall surface of the natural pores) can be directly released to the airflow channel. The aerosol is quickly and fully released through the natural pores, and is transported to the suction end through the airflow channel under the action of the suction negative pressure, thereby improving the generation amount of the aerosol. That is, the aerosol generating article of the embodiment of the present application can effectively improve the high loading of effective substances by the aerosol generating substrate section, and is also beneficial to improve the generation amount of the aerosol.

[0077] In addition, the raw material source of natural bamboo is relatively extensive, and the cost is relatively low, thereby being beneficial to reduce the manufacturing cost of the aerosol generating substrate section; and the temperature resistance of natural bamboo itself is relatively good, and basically no peculiar smell is generated after heating, thereby being beneficial to improve the taste of the aerosol. BRIEF DESCRIPTION OF DRAWINGS

[0078] FIG. 1 is a structural schematic view of an aerosol generating substrate section of a first embodiment of the present application;

[0079] FIG. 2 is a structural schematic view of a cross section of an aerosol generating substrate section of an embodiment of the present application;

[0080] FIG. 3 is a structural schematic view of an axial section of an aerosol generating substrate section of an embodiment of the present application;

[0081] Figure 4 is a schematic diagram of the axial section of the aerosol generation matrix segment according to another embodiment of this application;

[0082] Figure 5 is a schematic diagram of the axial section of the aerosol generation matrix segment according to another embodiment of this application;

[0083] Figure 6 is a schematic diagram of the structure of the aerosol generation matrix segment in the second embodiment of this application;

[0084] Figure 7 is a schematic diagram of the structure of the aerosol generation matrix segment according to the third embodiment of this application;

[0085] Figure 8 is a schematic diagram of the structure of the matrix unit preparation material according to the first embodiment of this application;

[0086] Figure 9 is a schematic diagram of the structure of the matrix unit in the first embodiment of this application;

[0087] Figure 10 is a schematic diagram of the structure of the matrix unit preparation material according to the second embodiment of this application;

[0088] Figure 11 is a schematic diagram of the structure of the matrix unit according to the second embodiment of this application;

[0089] Figure 12 is a schematic diagram of the structure of the aerosol generation matrix segment according to the fourth embodiment of this application;

[0090] Figure 13 is a schematic diagram of the structure of the aerosol generation matrix segment according to the fifth embodiment of this application;

[0091] Figure 14 is a schematic diagram of the structure of the aerosol generation matrix segment according to the sixth embodiment of this application;

[0092] Figure 15 is a schematic cross-sectional view of the aerosol generation matrix segment of the embodiment shown in Figure 14;

[0093] Figure 16 is a schematic diagram of the structure of the aerosol generation matrix segment in the seventh embodiment of this application;

[0094] Figure 17 is a top view of the aerosol generation matrix segment of the embodiment shown in Figure 16;

[0095] Figure 18 is a schematic diagram of the cross-sectional structure after being cut along section AA in Figure 17;

[0096] Figure 19 is a schematic diagram of the structure of the first aerosol-generating article according to an embodiment of this application;

[0097] Figure 20 is a schematic diagram of the structure of a second aerosol-generating article according to an embodiment of this application;

[0098] Figure 21 is a schematic diagram of the structure of a third aerosol-generating article according to an embodiment of this application;

[0099] Figure 22 is a flowchart of a method for preparing foamed bamboo material according to an embodiment of this application. DETAILED DESCRIPTION

[0100] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. The following embodiments are only used to clarify the technical solutions of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0101] In the description of the embodiments of the present application, the technical terms “first”, “second”, “third” and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of “a plurality of” is two or more, unless otherwise explicitly and specifically limited.

[0102] In this document, the term “embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean that it refers to the same embodiment, nor is it independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0103] In the description of the embodiments of the present application, the term “and / or” is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character “ / ” in this document generally represents an “or” relationship between the front and rear associated objects.

[0104] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms “mounting”, “connection”, “connection”, “fixing” and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0105] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be interpreted in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact with each other without interaction force or contact between two objects in contact with each other with interaction force.

[0106] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0107] Referring to FIGS. 1-18, the present application provides an aerosol generating substrate segment, which includes a substrate unit 11 including a medium carrier and a load, the medium carrier being configured to load the load, and the load including at least an aerosol generating agent. The medium carrier is made of pretreated natural bamboo, and the natural bamboo has a plurality of natural pores 11a inside.

[0108] Specifically, the pretreatment refers to acid washing the natural bamboo and then foaming the natural bamboo, so as to remove or reduce lignin, hemicellulose, etc. in the natural bamboo. The pretreated natural bamboo has a characteristic aroma that can be removed or reduced.

[0109] The natural bamboo is a macrostructure, for example, a bamboo piece or a bamboo strip. Of course, the natural bamboo can be processed to obtain natural bamboo fibers, which can also be used to prepare the medium carrier. It should be understood that the natural bamboo fiber is only one structural form of the natural bamboo.

[0110] The aerosol generating agent is configured to generate an aerosol when heated for a user to draw.

[0111] It should be noted that the aerosol generating substrate segment 10 of the present application can be suitable for ignition for drawing, or can be suitable for heating without combustion for drawing. In the present application, the aerosol generating substrate segment 10 is suitable for heating without combustion for drawing.

[0112] The form of the substrate unit 11 is not limited. For example, it can be in the form of a strip (substrate strip), or in the form of a sheet, or in the form of a particle, or in the form of a segment (i.e., the size of the substrate unit 11 in the length direction is smaller than the size of the cross section).

[0113] The medium carrier is a structural framework of the substrate unit 11, and the medium carrier does not generate an aerosol.

[0114] The natural bamboo material is a natural porous material, and is a material with natural straight-through holes, the extension direction of the natural straight-through holes being consistent with the length direction of the bamboo, that is, the natural pores at least include the natural straight-through holes. That is, the medium carrier manufactured by the natural bamboo material has relatively more natural pores 11a in the medium carrier itself. Thus, the medium carrier is facilitated to form more natural pores 11a.

[0115] Since the natural bamboo material has relatively high porosity and a large number of natural pores 11a, the adsorption performance is relatively good, so that more loadings can be adsorbed, and high loading of effective substances is realized.

[0116] That is, the medium carrier of the substrate unit 11 uses the natural bamboo material as a preparation raw material, so that the substrate unit 11 is facilitated to realize high loading of effective substances.

[0117] The processing mode of the substrate unit 11 is not limited. For example, the loadings can be injected into the natural bamboo material by quantitative injection; or the natural bamboo material can be immersed in a loading slurry in a liquid state and then taken out, and then dried and shaped; or the natural bamboo material can be immersed in a loading slurry in a liquid state, filled by pressure, and then dried and shaped.

[0118] It should be noted that after the substrate unit 11 is processed and formed, the loadings are condensed into a solid state or a colloid.

[0119] Meanwhile, due to the natural porous characteristics of the natural bamboo material, especially the multiple natural straight-through holes, the substrate unit 11 using the natural bamboo material as the medium carrier has relatively more natural pores 11a inside, which can increase the surface area of the substrate unit 11, and also increase the transmission channel of the aerosol in the substrate unit 11. The substrate unit 11 releases the aerosol by heating, and the generated aerosol can enter the natural pores 11a. The loadings exposed to the natural pores 11a (that is, the loadings located on the inner wall surface of the natural pores 11a) release the aerosol directly into the natural pores 11a, and the aerosol is quickly and fully released through the natural pores 11a and transported to the suction end under the action of the suction negative pressure. Thus, the generation amount of the aerosol is improved.

[0120] In the related art, the forms of the aerosol generating substrate section mainly include sheet type and particle type. The processing technology of the aerosol generating substrate section with different forms determines that the finished substrate unit is difficult to have a rich and varied pore structure, and the substrate unit with the corresponding form can be prepared only by a specific device. The aerosol generating substrate section with the sheet type structure can achieve high loading of effective substances, but the overall form of the aerosol generating substrate section is relatively dense, and there is no fixed pore structure, which leads to the inability to quickly generate aerosols when heated. The aerosol generating substrate section with the particle type structure has irregular pores inside, but it is difficult to achieve high loading of effective substances, which leads to a limited amount of generated aerosols. The substrate section with straight-through pores formed by extruding plant materials also has straight-through pores, but the process is complex, and the adsorption effect is lower than that of bamboo.

[0121] The aerosol generating substrate section of the present application embodiment, the substrate unit 11 of the aerosol generating substrate section 10 includes a medium carrier and a load, and the medium carrier is used to load the load. The aerosol generating agent in the load generates aerosols after heating for the user to use. The material of the medium carrier is natural bamboo, which is a natural porous material. That is, the medium carrier prepared from natural bamboo itself has a high porosity and a large number of natural pores 11a, and its adsorption performance is relatively good, so that it can adsorb more loads and achieve high loading of effective substances. At the same time, these natural pores 11a can also increase the surface area of the substrate unit 11. The generated aerosols can enter the natural pores 11a, and the aerosols released by the load exposed to the natural pores 11a (i.e., the load on the inner wall surface of the natural pores 11a) can be directly released to the natural pores 11a. The aerosols are quickly and fully released through the natural pores 11a and transported to the suction end under the action of the suction negative pressure. Therefore, the aerosol generating article of the present application embodiment can effectively improve the high loading of effective substances by the aerosol generating substrate section 10, and is also conducive to improving the amount of generated aerosols. The natural straight-through channel is also conducive to the transmission of aerosols.

[0122] In addition, the raw material source of natural bamboo is relatively extensive, and the cost of obtaining is relatively low, thereby being conducive to reducing the manufacturing cost of the aerosol generating substrate section 10. Moreover, the temperature resistance of natural bamboo itself is relatively good, and it basically does not produce an odor after heating, thereby being conducive to improving the taste of aerosols.

[0123] In an embodiment, the load further includes at least one of a plant component, a smoke generating agent, an adhesive component, a flavor component, and a nicotine component.

[0124] The plant component or smoking agent can generate aerosol when heated. The adhesive component is used to bond the raw material components. The flavor component is used to provide characteristic aroma. The nicotine component is used to promote the pituitary gland to produce dopamine, thereby obtaining physiological satisfaction. In this way, the plant component or smoking agent can ensure the amount of aerosol generation, while the flavor component can enhance the release of aroma during smoking, improving the user experience. The adhesive component ensures that the plant component, flavor component, nicotine component, and other components form a stable mixture, avoiding loose structure.

[0125] Exemplarily, the plant component is one or more combinations of powders formed after crushing tobacco raw materials, tobacco fragments, tobacco stems, tobacco fines, and aromatic plants. The plant component is the core source of product aroma, and endogenous substances in the plant component, such as nicotine, enter the human blood through atomization, promote the pituitary gland to produce dopamine, and thus obtain physiological satisfaction.

[0126] Exemplarily, the plant component can include one or more of tobacco, tea leaves, tea stems, dandelion, eucalyptus, clove, cassia, turmeric, fungus, insulin wood, astragalus, jujube kernel, horse bean, radix puerariae, fennel, rosemary, star anise, honeysuckle, chrysanthemum, rose, marigold, mugwort, olive, ginseng, American ginseng, mung bean, red bean, dried tangerine or orange peel, nut shell, lily, coffee, agarwood, mint, hawthorn, licorice, cocoa, agaric, lotus seed, lotus leaf, cooling ginger, fresh ginger, bitter buckwheat, and wheat bran. The mass fraction of the plant component in the aerosol substrate can be 20%-80% (including the end point value).

[0127] Exemplarily, the adhesive component is a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of ambarella polysaccharide, pullulan, fucoidan, locust bean gum, guar gum, and xyloglucan. The adhesive component is closely contacted by wetting the interface with the component material of the product, generating intermolecular attraction, thereby playing a role in bonding the powders, liquids, and other components of the material. At the same time, by selecting a natural plant extract and a non-ionized adhesive, the release of harmful substances such as methanol, formaldehyde, and propylene aldehyde caused by modification of the adhesive can be avoided, improving the safety of the product.

[0128] Exemplarily, the flavor component is used to provide characteristic aroma, such as hay aroma, roasted sweet aroma, and solid or liquid nicotine. The flavor component can include one or more combinations of tobacco or other plants, aromatic plant extracts, extracts, essential oils, and net oils; the flavor component can include monomer flavor substances, such as one or more combinations of megastigmatrienone, neophytadiene, geraniol, and neral.

[0129] In some embodiments, the smoking agent is used to generate aerosol when heated, whereby the smoking agent and the plant component synergistically act to ensure the amount of aerosol generation.

[0130] Exemplarily, the smoking agent can include one or more of the following: monohydric alcohols (e.g., menthol); polyhydric alcohols (e.g., propylene glycol, glycerol, triethylene glycol, 1,3-butanediol, and tetraethylene glycol); esters of polyhydric alcohols (e.g., triacetin, triethyl citrate, glycerol diacetate mixture, triethyl citrate, benzyl benzoate, glycerol tributyrate); monocarboxylic acids; dicarboxylic acids; polycarboxylic acids (e.g., lauric acid, myristic acid) or fatty esters of polycarboxylic acids (e.g., dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, glycerol diacetate mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, glycerol tributyrate, lauryl acetate).

[0131] It should be noted that the type of the natural gas hole 11a is not limited. Exemplarily, each natural gas hole 11a includes at least one of a through hole, a blind hole, and a buried hole.

[0132] The through hole is the natural gas hole 11a which communicates with the outside at both ends. The blind hole is the natural gas hole 11a which communicates with the outside at one end and does not communicate with the outside at the other end. The buried hole is the natural gas hole 11a which does not communicate with the outside at both ends.

[0133] It should be noted that, regardless of whether the natural gas hole 11a is a buried hole, a through hole, or a blind hole, the aerosol can pass through the natural gas hole 11a in various types of natural gas holes 11a by permeation or the like to achieve a suitable resistance to draw. Alternatively, in the pretreatment process, the number of blind holes and buried holes is reduced as much as possible, and the number of through holes is increased.

[0134] In an embodiment, the density of the substrate unit 11 is 50 mg / cm 3 ~ 1000 mg / cm 3 . For example, 50 mg / cm 3 , 60 mg / cm 3 , 70 mg / cm 3 , 80 mg / cm 3 , 90 mg / cm 3 , 100 mg / cm 3 , 200 mg / cm 3 , 300 mg / cm 3 , 400 mg / cm 3 , 500 mg / cm 3 , 600 mg / cm 3 , 700 mg / cm 3 , 800 mg / cm 3 , 900 mg / cm 3 , 1000 mg / cm3 and so on.

[0135] When the density of the substrate unit 11 is too high, the effective substance load is high, which can cause the natural gas holes 11a inside the substrate unit 11 to be blocked, the aerosol generated by the front section of the aerosol generating substrate section 10 being relatively limited, the aerosol generated by the middle and rear sections being relatively sufficient, and the effective substance being fully released; when the density of the substrate unit 11 is too low, the effective substance load is low, the aerosol generated by the substrate unit 11 being able to be released relatively quickly through the natural gas holes 11a inside the substrate unit 11, the aerosol generated by the front section of the aerosol generating substrate section 10 being relatively sufficient, and the aerosol generated by the middle and rear sections being significantly attenuated.

[0136] In this embodiment, the density of the substrate unit 11 is controlled within a suitable range, which is conducive to the aerosol generating substrate section 10 generating aerosol relatively uniformly during the use period, thereby improving the smoking experience.

[0137] It should be noted that the heating assembly of the aerosol generating device heats the aerosol generating substrate section 10, and the aerosol generating substrate section 10 releases aerosol when heated. The user puffs on the aerosol intermittently, that is, the user puffs on one puff of aerosol, stops puffing, and then puffs on the next puff of aerosol. The front section of the puffing refers to the period when the aerosol generating substrate section 10 is initially used, and the first few puffs correspond to the front section of the puffing, for example, 1-5 puffs. The rear section of the puffing refers to the period when the aerosol generating substrate section 10 is close to the complete release of the aerosol, and the last few puffs correspond to the rear section of the puffing, for example, the last 1-5 puffs. The front section and the rear section of the puffing refer to the early and late stages of the use life cycle of the aerosol generating substrate section 10, respectively. The middle section of the puffing refers to the puffing period between the front section and the rear section.

[0138] In an embodiment, the ratio of the weight of the load to the weight of the medium carrier is 0.1-30. For example, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.2, 1.4, 1.6, 1.8, 2, 2.3, 2.6, 2.9, 3, 3.4, 3.8, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 23, 26, 29, 30, and so on. The ratio of the weight of the load to the weight of the medium carrier is preferably 1-20, or 3-15, or 5-10.

[0139] It should be noted that the ratio of the weight of the load to the weight of the medium carrier is positively correlated with the density of the substrate unit 11. By controlling the ratio within the range of 0.1-30, the density of the substrate unit 11 can be controlled within a more suitable range.

[0140] In an embodiment, the natural gas holes 11a have a pore size of 0.1 μm to 2 cm, or more than 90% of the natural gas holes 11a have a pore size of 0.1 μm to 2 cm. For example, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1 μm, 5 μm, 10 μm, 100 μm, 500 μm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 1 cm, 1.5 cm, 2 cm, etc.

[0141] It should be noted that the pore size of the natural gas holes 11a refers to the pore size of the medium carrier without loading the load, and the pore size of the natural gas holes 11a can decrease after loading the load.

[0142] It can be understood that if the pore size of the natural gas holes 11a is too small, the condensation of the load after the medium carrier adsorbs the load can cause a relatively high blockage rate of the natural gas holes 11a, which is not conducive to the release of the aerosol. If the pore size of the natural gas holes 11a is too large, the surface area is reduced, and thus the adsorption capacity of the medium carrier is reduced.

[0143] In the embodiment, the pore size of more than 90% of the natural gas holes 11a is controlled in the range of 0.1 μm to 2 cm, and the pore size of the natural gas holes 11a is more appropriate, so that the adsorption capacity of the medium carrier can be effectively ensured. After the medium carrier adsorbs the load and forms the substrate unit 11, the blockage rate of the natural gas holes 11a inside the substrate unit 11 is reduced, that is, the release of the aerosol is facilitated.

[0144] It should be noted that the number of the substrate units 11 of one aerosol generating substrate section 10 is not limited. In some embodiments, one aerosol generating substrate section 10 has only one substrate unit 11.

[0145] In other embodiments, referring to FIGS. 1 to 7 and 12, the number of the substrate units 11 is multiple, and the aerosol generating substrate section 10 further comprises a wrapping layer 12. The wrapping layer 12 is wound to form an accommodation space, and all the substrate units 11 are accommodated in the accommodation space.

[0146] The wrapping layer 12 can be in a hollow tubular shape, and all the substrate units 11 are accommodated in the accommodation space of the wrapping layer 12. The wrapping layer 12 can also be a tipping paper, and all the substrate units 11 are compounded into an integrated structure by the tipping paper. The wrapping layer 12 can play a role in shaping and protecting the substrate units 11.

[0147] It should be noted that, based on the segment structure of the matrix unit 11, the aerosol generating substrate segment 10 can be formed without filling; or a plurality of thin sheet-shaped matrix units 11 are combined to form the aerosol generating substrate segment 10; or the granular matrix unit 11 is reprocessed (filled, extruded) to obtain the aerosol generating substrate segment 10.

[0148] The filling rate of the aerosol generating substrate segment 10 can be designed as needed. For example, the filling rate of the aerosol generating substrate segment 10 is 40% to 100% (including the end value). For example, 40%, 50%, 60%, 70%, 80%, 90%, 100%, etc. The filling rate of the aerosol generating substrate segment 10 in this range is more suitable for the effective load, which is beneficial to the uniform generation of aerosol by the aerosol generating substrate segment 10 during the use cycle.

[0149] For example, referring to FIG. 2, the cross-sectional area of each matrix unit 11 accounts for 40% to 100% of the area of the wrapping layer 12.

[0150] The arrangement of the plurality of matrix units 11 in the wrapping layer 12 is not limited. In some embodiments, referring to FIGS. 3 and 4, at least part of the matrix units 11 are arranged in parallel along a first direction to form a bundle.

[0151] Specifically, each matrix unit 11 extends along the first direction. The first direction is the direction indicated by L1 in FIGS. 3 and 4. In this embodiment, the matrix unit 11 is substantially in the form of a strip, that is, a matrix strip.

[0152] The extension direction of the matrix unit 11 can be defined as the first direction, and the parallel arrangement means that the projection of the part of the matrix units 11 on the projection plane parallel to the first direction at least partially overlaps. That is, the part of the matrix units 11 is not sequentially connected end to end along the first direction, but is substantially side by side. That is, the part of the matrix units 11 is in a substantially parallel state and is substantially parallel to the central axis of the aerosol generating substrate segment 10. When the aerosol generating substrate segment 10 is a cylinder, the central axis is the central axis of the cylinder. When the aerosol generating substrate segment 10 is a body of revolution, the central axis is the axis of symmetry. If the aerosol generating substrate segment 10 is not symmetrical, the central axis corresponds to the direction of the airflow during smoking.

[0153] When the matrix units 11 are arranged in a bundle, the matrix units 11 are in contact with the immediately adjacent other matrix units 11 around them. It can be full contact along the axis direction of the matrix unit 11, or it can be partial contact due to the unevenness of the surface of the matrix unit 11, or it can be partial length segment contact due to special design.

[0154] In other embodiments, referring to FIGS. 4 and 5, the substrate units 11 are stacked in the first direction. For example, referring to the aerosol generating substrate segment 10 shown in FIG. 5, the end surface of one substrate unit 11 is disposed opposite the end surface of another substrate unit 11 in the first direction.

[0155] In this embodiment, the shape of the substrate units 11 is not limited. For example, the substrate units 11 can be in a sheet form or a small segment form. The sheet form refers to a substrate unit 11 having a relatively small thickness dimension (i.e., a dimension in the first direction). The small segment form refers to a substrate unit 11 having a thickness dimension greater than that of the sheet form but less than that of a rod form in the first direction.

[0156] In still other embodiments, the granular substrate units 11 can also be randomly filled in the accommodation space of the packaging layer 12.

[0157] In one embodiment, the substrate units 11 have a thermal conductivity of 0.03 W / m.k to 0.3 W / m.k. For example, the thermal conductivity can be 0.03 W / m.k, 0.04 W / m.k, 0.05 W / m.k, 0.06 W / m.k, 0.07 W / m.k, 0.08 W / m.k, 0.09 W / m.k, 0.1 W / m.k, 0.12 W / m.k, 0.14 W / m.k, 0.16 W / m.k, 0.18 W / m.k, 0.2 W / m.k, 0.25 W / m.k, 0.3 W / m.k, etc.

[0158] The thermal conductivity reflects the heat conduction capacity of the substrate units 11. When the aerosol generating substrate segment 10 is heated by an external heat source, a high thermal conductivity can enable rapid heat transfer between the substrate units 11, allowing the substrate units 11 to generate aerosol more quickly and sufficiently under the same heating conditions.

[0159] For example, the thermal conductivity of the substrate units 11 can be adjusted according to the type of heat source. For example, in a central heating type aerosol generating device, a heating assembly is inserted into the inside of the aerosol generating substrate segment 10, and in a circumferential heating type aerosol generating device, a heating assembly is disposed around the outer periphery of the aerosol generating substrate segment 10. Accordingly, the thermal conductivity of the substrate units 11 can gradually increase or decrease from the inside to the outside in the radial direction of the aerosol generating substrate segment 10.

[0160] The thermal conductivity of the substrate unit 11 in the embodiment is controlled in the range of 0.03 W / m·K to 0.3 W / m·K. On the one hand, the thermal conductivity of the substrate unit 11 is not too small, so that the heat provided by the heating source can be fully transmitted between the substrate units 11 during use, so that the aerosol generating substrate section 10 can generate aerosol sufficiently. On the other hand, the thermal conductivity of the substrate unit 11 is positively correlated with the loading amount of the load on the substrate unit 11. When the loading rate of the load is too large, the heat capacity of the medium carrier may be large, that is, the aerosol generated by the substrate unit 11 cannot be fully released. By controlling the thermal conductivity of the substrate unit 11 to be not greater than 1.2 W / m·K, the loading amount of the load can be controlled within a suitable range, so that the aerosol generated by the substrate unit 11 can be fully released, and the suction resistance of the aerosol suction can also be controlled.

[0161] In an embodiment, the porosity of the substrate unit 11 is 35% to 98%. For example, it is 35%, 38%, 41%, 44%, 47%, 50%, 53%, 56%, 59%, 62%, 65%, 68%, 71%, 74%, 77%, 80%, 83%, 86%, 89%, 92%, 95%, 98%, and the like.

[0162] It should be noted that in the embodiment in which the substrate unit 11 does not include the packaging layer 12, the porosity of the substrate unit 11 refers to the ratio of the sum of the volumes of all natural pores 11a inside the substrate unit 11 to the volume of the medium carrier. In the embodiment in which the substrate unit 11 includes the packaging layer 12, the porosity of the substrate unit 11 refers to the ratio of the sum of the volumes of all natural pores 11a inside the substrate unit 11 to the volume of the accommodation space.

[0163] If the porosity of the substrate unit 11 is too large, the loading amount of the load in the substrate unit 11 will be relatively small, so that the generation amount of the aerosol will be relatively limited. If the porosity is too small, the natural pores 11a inside the medium carrier may be blocked, which is not conducive to adsorption and release of the aerosol.

[0164] In the embodiment, the porosity of the substrate unit 11 is relatively reasonable, which is conducive to ensuring the generation amount of the aerosol and facilitating the release of the aerosol.

[0165] In a specific embodiment, referring to FIG. 2, the substrate unit 11 is in a cylindrical shape, and its diameter and density do not change along the extension direction of the substrate unit 11. The medium carrier made of natural bamboo carries smoking agents, fragrances, and nicotine. The weight of the load is 12 times the weight of the medium carrier, and the density of the substrate unit 11 is 600 mg / cm 3The diameter of the gas solubility carrier is 7.0 mm, the pore size of more than 90% of the natural gas holes 11a in the gas solubility carrier ranges from 0.1 μm to 1 cm, the porosity of the matrix unit 11 is 65%, the thermal conductivity coefficient of the matrix unit 11 is 0.25 W / m·K, the matrix unit 11 is uniformly distributed in the aerosol generating substrate section 10, and the filling rate of the matrix unit 11 in the aerosol generating substrate section 10 is 100%.

[0166] Referring to FIGS. 1 to 18, an aerosol generating substrate section 10 according to an embodiment of the present disclosure includes a matrix unit 11 including a gas solubility carrier and a load, the gas solubility carrier being configured to load the load, the load including at least an aerosol generating agent, the gas solubility carrier being configured to be formed of a plant material including a plurality of natural gas holes 11a arranged in parallel, and the aerosol generating substrate section 10 having a plurality of airflow passages 21a extending in a first direction inside the aerosol generating substrate section 10, the natural gas holes 11a forming the airflow passages 21a.

[0167] It is to be noted that the first direction is an axial direction of the aerosol generating substrate section 10, and is specifically a direction indicated by L1 in FIGS. 3 to 14, 16, 19 to 21.

[0168] The natural gas hole 11a refers to a natural through hole, that is, the natural gas hole 11a penetrates the gas solubility carrier to opposite ends in the first direction.

[0169] The natural gas hole 11a forms the airflow passage 21a. In this way, the formation of the airflow passage 21a is facilitated. Airflow can enter the inside of the aerosol generating substrate section 10 at one end thereof and exit from the other end thereof, so that aerosol can be entrained to exit the aerosol generating substrate section 10 for use by a user.

[0170] The specific type of the plant is not limited.

[0171] Exemplarily, the gas solubility carrier is bamboo material including the natural gas holes 11a, the natural gas holes 11a extending in a length direction of the aerosol generating substrate section 10. Here, the length direction of the aerosol generating substrate section 10 is the axial direction thereof.

[0172] The bamboo material may, for example, be natural bamboo material. The advantages of using the natural bamboo material as the gas solubility carrier have been described above, and will not be repeated here.

[0173] Exemplarily, the gas solubility carrier may, for example, include at least one of bamboo, wood, kudzu, wisteria, lonicera japonica, grapevine, milkvetch root, codonopsis root, rush stem, water onion stem, sugarcane, corn, sorghum, and reed.

[0174] It can be understood that when any plant is used as the medium carrier, the plant can also be pretreated, and the pretreatment steps can refer to the pretreatment steps of the natural main material, which will not be described herein.

[0175] In some embodiments, the content of cellulose is in the range of 10-50% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, and the like.

[0176] Further, the content of cellulose is in the range of 25-45%. For example, it can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 44%, 44%, 45%, and the like.

[0177] In some embodiments, the content of hemicellulose is in the range of 0.5-10% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, and the like.

[0178] Further, the content of hemicellulose is in the range of 1-5%. For example, it can be 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8%, 3%, 3.2%, 3.4%, 3.6%, 3.8%, 4%, 4.2%, 4.4%, 4.6%, 4.8%, 5%, and the like.

[0179] In some embodiments, the content of lignin is in the range of 0.3-8% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 0.3%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, and the like.

[0180] Further, the content of lignin is in the range of 0.5-4%. For example, it can be 0.5%, 0.7%, 0.9%, 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.1%, 2.3%, 2.5%, 2.7%, 2.9%, 3%, 3.2%, 3.4%, 3.6%, 3.8%, 4%, and the like.

[0181] Note that cellulose, hemicellulose, and lignin are main components of bamboo, wood, and most plants, and cellulose is a skeletal structural component of the medium carrier.

[0182] In some embodiments, the content of the aerosol generating agent is in the range of 10% to 60% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, etc.

[0183] In some embodiments, the content of nicotine is in the range of 0% to 5% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8%, 3%, 3.2%, 3.4%, 3.6%, 3.8%, 4%, 4.2%, 4.4%, 4.6%, 4.8%, 5%, etc. It can be understood that when the content of nicotine is 0%, the aerosol generating substrate segment 10 does not contain nicotine.

[0184] In some embodiments, the content of water is in the range of 3% to 15% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc.

[0185] In some embodiments, the content of other components other than cellulose, hemicellulose, lignin, the aerosol generating agent, nicotine, and water is in the range of 5% to 30% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 5%, 7%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 21%, 23%, 25%, 27%, 29%, 30%, etc.

[0186] Here, when other plants other than natural bamboo are used as the medium carrier, the processing method of the medium carrier using natural bamboo as a raw material can be referred to.

[0187] The medium carrier is configured to be formed by a plant containing a plurality of natural gas holes 11a arranged in parallel. That is, the medium carrier manufactured by the plant itself has more natural gas holes 11a, and the natural gas holes 11a form the airflow passage 21a. In this way, the medium carrier forms more airflow passages 21a, thereby facilitating the production efficiency of the aerosol generating substrate segment 10. In addition, the medium carrier is made of a plant of natural origin, which is biodegradable and environmentally friendly.

[0188] Since the plant containing a plurality of natural gas holes 11a arranged in parallel has a high porosity, the substrate unit 11 formed by the medium carrier has a proper resistance, thereby improving the aerosol delivery efficiency and improving the smoking experience.

[0189] The aerosol generating substrate segment 10 of the embodiment of the present application, the substrate unit 11 of the aerosol generating substrate segment 10 includes a medium carrier and a load, and the medium carrier is used to load the load. The aerosol generating agent in the load generates an aerosol after being heated for the user to use. The material of the medium carrier is a plant, and the plant has a plurality of natural gas holes 11a arranged in parallel, that is, the medium carrier manufactured has a high porosity, and its adsorption performance is relatively good, so that it can adsorb more loads, thereby achieving high loading of effective substances. At the same time, these natural gas holes 11a can also increase the surface area of the substrate unit 11. The generated aerosol can enter the natural gas holes 11a when the substrate unit 11 is heated to release the aerosol. The aerosol released by the load exposed to the natural gas holes 11a (i.e., the load located on the inner wall surface of the natural gas holes 11a) can be directly released to the natural gas holes 11a. The aerosol is quickly and fully released through the natural gas holes 11a, and the natural gas holes 11a form the airflow passage 21a, so that it can be delivered to the suction end under the action of the suction negative pressure. In this way, the amount of aerosol generated is increased. That is, the aerosol generating article of the embodiment of the present application can effectively improve the high loading of effective substances by the aerosol generating substrate segment 10, and also facilitate the increase of the amount of aerosol generated.

[0190] In addition, the raw material of the plant is relatively extensive, and the cost of obtaining is relatively low, thereby facilitating the reduction of the manufacturing cost of the aerosol generating substrate segment 10; and the temperature resistance of the plant itself is relatively good, and the plant basically does not produce an odor after being heated, thereby facilitating the improvement of the taste of the aerosol.

[0191] In an embodiment, the load further includes at least one of a smoking agent, a flavor, a spice, nicotine, a herbal powder, a herbal plant extract, a herbal plant extract, a tobacco powder, a tobacco extract, and a tobacco extract. In this way, the aerosol generating substrate segment 10 can select appropriate loads according to the taste requirements or according to the processing difficulty to meet the different use requirements of users or different processing cost requirements.

[0192] Specifically, when the load includes the herb powder, the content of the herb powder is in the range of 3% to 35% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 3%, 5%, 7%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 31%, 33%, 35%, and the like.

[0193] Specifically, when the load includes the tobacco powder, the content of the tobacco powder is in the range of 5% to 50% by mass percentage of the aerosol generating substrate segment 10. For example, it can be 5%, 7%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, and the like. The content of the smoking agent refers to the bamboo material.

[0194] In an embodiment, the load further includes herb extracts, and the herb extracts include at least one of mint extract, liquorice extract, chrysanthemum extract, monk fruit extract, ginger extract, chamomile extract, tea extract, lavender extract, cocoa extract, eucalyptus extract, and cinnamon extract.

[0195] By adding the herb extracts to the aerosol generating substrate segment 10, the herb aroma of the aerosol generating substrate segment 10 is improved, so as to meet the more smoking taste of the user. The herb is loaded on the medium carrier in the form of extract, which is beneficial to reduce the processing difficulty and improve the loading efficiency.

[0196] In an embodiment, the load includes tobacco extracts, and the tobacco extracts include at least one of tobacco water extract, tobacco alcohol extract, tobacco supercritical CO2 extract, and tobacco enzymatic extract.

[0197] By adding the tobacco extracts to the aerosol generating substrate segment 10, the tobacco aroma of the aerosol generating substrate segment 10 is improved, so as to meet the more smoking taste of the user. The tobacco is loaded on the medium carrier in the form of extract, which is beneficial to reduce the processing difficulty and improve the loading efficiency.

[0198] It should be noted that the tobacco alcohol extract refers to a substance extracted from tobacco raw materials by using alcohol (such as ethanol) as a solvent. Similarly, the tobacco supercritical CO2 extract refers to a substance extracted from tobacco raw materials by using supercritical CO2 as a solvent.

[0199] The tobacco enzymatic extract refers to a product obtained by pretreating (enzymolysis) tobacco raw materials with specific enzymes in the process of extracting tobacco active ingredients, and then extracting (possibly water extraction, alcohol extraction or other methods). By enzymolysis, the cell wall structure (cellulose, hemicellulose, pectin, etc.) of tobacco is destroyed, and the combination state of the intracellular active ingredients (such as nicotine, sugars, aroma precursor substances) and the cell wall is broken, so that they are more easily dissolved by the solvent. After the cell wall is destroyed, the target components (especially the intracellular combined components) are released more fully, which is beneficial to improve the extraction efficiency (such as the extraction rate of nicotine and reducing sugar); and macromolecular impurities (such as starch and pectin) can be specifically degraded, so that the final obtained extract is more clear, which is beneficial to reduce gum and turbidity.

[0200] In an embodiment, the porosity of the medium carrier is in the range of 50% to 98%. The porosity of the medium carrier can be any one of 50%, 52%, 53%, 54%, 55%, 58%, 60%, 61%, 63%, 64%, 65%, 68%, 70%, 72%, 73%, 75%, 77%, 80%, 82%, 83%, 85%, 86%, 90%, 92%, 93%, 95%, 98% or any point value between any two of them.

[0201] It should be noted that the porosity of the medium carrier refers to the ratio of the sum of the volumes of all airflow channels 21a inside the medium carrier to the volume of the medium carrier.

[0202] The porosity can be measured according to the method specified in YC / T 473-2013 "Determination of apparent density, true density and internal pore volume of cut tobacco".

[0203] Here, when the porosity of the medium carrier is too small, it can cause the medium carrier to have a large resistance, which can greatly limit the generation and migration of aerosol. When the porosity of the medium carrier is too large, it can cause the medium carrier to have a small resistance, which can cause the medium carrier to have insufficient stiffness.

[0204] In this way, by setting the porosity of the medium carrier in the range of 50% to 98%, the resistance of the medium carrier can be appropriate, which is beneficial to the generation and migration of aerosol and has a certain stiffness.

[0205] Preferably, the porosity of the medium carrier is in the range of 80% to 95%.

[0206] In an embodiment, the porosity of the substrate unit 11 is in a range of 20% to 90%. For example, the porosity of the substrate unit 11 is any one of 20%, 22%, 24%, 26%, 28%, 30%, 31%, 33%, 35%, 37%, 39%, 40%, 42%, 44%, 46%, 48%, 50%, 51%, 53%, 55%, 57%, 59%, 60%, 62%, 64%, 66%, 68%, 70%, 71%, 73%, 75%, 77%, 79%, 80%, 82%, 84%, 86%, 88%, 90%, or any value between any two of the above values.

[0207] It can be understood that the porosity of the substrate unit 11 is lower than the porosity of the medium carrier after the medium carrier is loaded with the load.

[0208] In the embodiment, the porosity of the substrate unit 11 is appropriate. In this way, the suction resistance of the substrate unit 11 is appropriate, which is beneficial to the generation and migration of the aerosol and has a certain stiffness.

[0209] In an embodiment, the density of the medium carrier is in a range of 0.05 g / cm 3 to 0.3 g / cm 3 .

[0210] The density of the medium carrier can be any one of 0.05 g / cm 3 , 0.06 g / cm 3 , 0.08 g / cm 3 , 0.1 g / cm 3 , 0.12 g / cm 3 , 0.13 g / cm 3 , 0.15 g / cm 3 , 0.16 g / cm 3 , 0.17 g / cm 3 , 0.2 g / cm 3 , 0.22 g / cm 3 , 0.23 g / cm 3 , 0.24 g / cm 3 , 0.25 g / cm 3 , 0.26 g / cm 3 , 0.28 g / cm 3 , 0.3 g / cm 3 , or any value between any two of the above values.

[0211] Here, when the density of the medium carrier is too large, it can cause the medium carrier to have a large suction resistance, a small load amount of the load, and thus a small amount of smoke, thereby greatly limiting the generation and migration of aerosol. When the density of the medium carrier is too small, it can cause the medium carrier to have insufficient stiffness, a small amount of smoke, poor consistency of the medium carrier, and low smoking satisfaction.

[0212] In this way, by setting the density of the medium carrier to be in the range of 0.05 g / cm 3 to 0.3 g / cm 3 , the suction resistance, stiffness, and load amount of the load of the medium carrier can be considered, thereby being beneficial to improving the consistency and smoking satisfaction of the aerosol generating substrate segment 10.

[0213] Preferably, the density of the medium carrier is in the range of 0.1 g / cm 3 to 0.24 g / cm 3 .

[0214] In an embodiment, the density of the substrate unit 11 is in the range of 0.4 g / cm 3 to 1.2 g / cm 3 . For example, it can be 0.4 g / cm 3 , 0.45 g / cm 3 , 0.5 g / cm 3 , 0.55 g / cm 3 , 0.6 g / cm 3 , 0.65 g / cm 3 , 0.7 g / cm 3 , 0.75 g / cm 3 , 0.8 g / cm 3 , 0.85 g / cm 3 , 0.9 g / cm 3 , 0.95 g / cm 3 , 1 g / cm 3 , 1.05 g / cm 3 , 1.1 g / cm 3 , 1.15 g / cm 3 , 1.2 g / cm 3 , and the like.

[0215] It can be understood that the density of the substrate unit 11 is higher than that of the medium carrier after the medium carrier is loaded with the load.

[0216] Here, the density of the substrate unit 11 is controlled to be in the range of 0.4 g / cm 3 to 1.2 g / cm 3 .The average equivalent diameter of all the airflow passages 21a with an equivalent diameter greater than or equal to 0.01 mm in the axial cross section of the aerosol generating substrate segment 10 is in the range of 0.01 mm to 0.05 mm. For example, it can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, and the like.

[0217] In an embodiment, the average equivalent diameter of all the airflow passages 21a with an equivalent diameter greater than or equal to 10 μm is in the range of 0.05 mm to 0.8 mm.

[0218] Further, the average equivalent diameter of all the airflow passages 21a with an equivalent diameter greater than or equal to 0.01 mm in the cross section of the aerosol generating substrate segment 10 is in the range of 0.05 mm to 0.5 mm. For example, it can be 0.05 mm, 0.07 mm, 0.09 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, 0.21 mm, 0.23 mm, 0.25 mm, 0.27 mm, 0.29 mm, 0.3 mm, 0.32 mm, 0.34 mm, 0.36 mm, 0.38 mm, 0.4 mm, 0.41 mm, 0.43 mm, 0.45 mm, 0.47 mm, 0.49 mm, 0.5 mm, and the like.

[0219] In an embodiment, the average equivalent diameter of all the airflow passages 21a with an equivalent diameter greater than or equal to 0.01 mm in the axial cross section of the aerosol generating substrate segment 10 is in the range of 0.01 mm to 0.05 mm. For example, it can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, and the like.

[0220] It should be noted that the axial cross section of the aerosol generating substrate segment 10 refers to the cross section where the axis of the aerosol generating substrate segment 10 is located.

[0221] In an embodiment, the length dimension of the aerosol generating substrate segment 10 is in the range of 5 mm to 60 mm. For example, it can be any one of 5 mm, 7 mm, 8 mm, 10 mm, 12 mm, 13 mm, 15 mm, 18 mm, 20 mm, 25 mm, 28 mm, 30 mm, 35 mm, 38 mm, 40 mm, 42 mm, 43 mm, 45 mm, 48 mm, 50 mm, 55 mm, 60 mm, or a point value between any two of them.

[0222] By setting the length dimension of the aerosol generating substrate segment 10 in the range of 5 mm to 60 mm, the length of the aerosol generating substrate segment 10 can be appropriate, so that sufficient aerosol can be generated, and at the same time, the size of the aerosol generating substrate segment 10 will not be too long, which is conducive to controlling the overall length dimension of the aerosol generating article, thereby facilitating the carrying of the aerosol generating article.

[0223] In an embodiment, more than 90% of the airflow passages 21a in the medium carrier have an equivalent diameter in the range of 1 μm to 2 mm.

[0224] That is, the ratio of the number of airflow passages 21a in the medium carrier having an equivalent diameter in the range of 1 μm to 2 mm to the total number of airflow passages 21a in the medium carrier is greater than or equal to 90%.

[0225] It can be understood that the airflow passages 21a with an equivalent diameter less than 1 μm are easy to be blocked by the load or other substances. If there are too many airflow passages 21a with an equivalent diameter less than 1 μm, the draw resistance of the medium carrier after loading the load will be large, and the draw resistance may be small during use, affecting the consistency of the taste. If there are too many airflow passages 21a with an equivalent diameter greater than 2 mm, the draw resistance of the medium carrier will be small, and the load capacity of the medium carrier for the load will be reduced.

[0226] Therefore, by setting the ratio of the number of airflow passages 21a in the medium carrier having an equivalent diameter in the range of 1 μm to 2 mm to the total number of airflow passages 21a in the medium carrier to be greater than or equal to 90%, the draw resistance and the load capacity of the medium carrier for the load can be considered, and the change of the draw resistance of the medium carrier during use can be reduced, thereby improving the consistency of the taste.

[0227] It should be noted that the natural pores of the plant can be exactly the same as the airflow passages 21a of the medium carrier, or the natural pores 11a of the plant can be processed to form the airflow passages 21a of the medium carrier, that is, the size and / or shape of the natural pores 11a are different from those of the airflow passages 21a.

[0228] The natural pores 11a of the plant can extend only in the first direction, or can extend in the radial direction of the plant.

[0229] In an embodiment, the aerosol-generating substrate section 10 has a thermal conductivity in the range of 0.1 W / m.k to 0.3 W / m.k. For example, 0.1 W / m.k, 0.12 W / m.k, 0.14 W / m.k, 0.16 W / m.k, 0.18 W / m.k, 0.2 W / m.k, 0.22 W / m.k, 0.24 W / m.k, 0.26 W / m.k, 0.28 W / m.k, 0.3 W / m.k, and the like.

[0230] The thermal conductivity reflects the heat conduction capacity of the aerosol-generating substrate section 10. When the aerosol-generating substrate section 10 is heated by an external heating source, a high thermal conductivity can achieve rapid heat transfer between the substrate units 11, so that the substrate units 11 can generate aerosol faster and more fully under the same heating condition.

[0231] Exemplarily, the thermal conductivity of the aerosol generating substrate segment 10 can be adjusted according to different heating sources. For example, for a center heating type aerosol generating device, the heating assembly is inserted into the inside of the aerosol generating substrate segment 10, and for a perimeter heating type aerosol generating device, the heating assembly is arranged around the outer periphery of the aerosol generating substrate segment 10. Therefore, the thermal conductivity of each substrate unit 11 can gradually increase or decrease along the radial direction of the aerosol generating substrate segment 10 from inside to outside.

[0232] The thermal conductivity of the aerosol generating substrate segment 10 of the embodiment is controlled in the range of 0.1 W / m·K to 0.3 W / m·K. On the one hand, the thermal conductivity of the aerosol generating substrate segment 10 is not too small, so that the heat provided by the heating source can be fully transmitted between the substrate units 11 during use, so that the aerosol generating substrate segment 10 can generate aerosol sufficiently. On the other hand, the thermal conductivity of the aerosol generating substrate segment 10 is positively correlated with the load of the load material on the substrate unit 11. When the load rate of the load material is too large, the natural pores 11a of the medium carrier can be blocked, and the heat capacity can also be large, that is, the aerosol generated by the substrate unit 11 cannot be fully released in a short time. By controlling the thermal conductivity of the aerosol generating substrate segment 10 in the range of not greater than 0.3 W / m·K, the load of the load material can be controlled in a suitable range, so that the aerosol generated by the substrate unit 11 can be fully released, and the suction resistance of the aerosol suction can also be controlled.

[0233] In an embodiment, the specific heat capacity of the aerosol generating substrate segment 10 is in the range of 1.0 kJ / (kg·K) to 3.8 kJ / (kg·K).

[0234] Exemplarily, the specific heat capacity of the aerosol generating substrate segment 10 can be measured according to the method specified in GB / T 19466.4-2016 “Plastics-Differential Scanning Calorimetry (DSC)-Part 4: Determination of Specific Heat Capacity”.

[0235] It should be noted that the specific heat capacity is a physical quantity describing the heat absorption or release capacity of a substance. The specific heat capacity refers to the heat absorbed or released by per unit mass of a substance when the temperature is increased or decreased by 1°C. The greater the specific heat capacity of the aerosol generating substrate segment 10, the more heat needs to be absorbed during heating, which means that the heating assembly needs to increase more heat, and the temperature rise of the aerosol generating substrate segment 10 itself during heating is slower, which can cause slow release of aerosol, small amount of smoke in the first few puffs, and easy release of volatile components (mainly aroma components) during the slow heating process of the aerosol generating substrate segment 10, resulting in poor consistency of aroma and smoke amount before and after smoking.

[0236] Exemplarily, the specific heat capacity of the aerosol-generating substrate segment 10 can be a point value of any one of or a point value between any two of 1.0 kJ / (kg·K), 1.1 kJ / (kg·K), 1.2 kJ / (kg·K), 1.3 kJ / (kg·K), 1.5 kJ / (kg·K), 1.6 kJ / (kg·K), 1.8 kJ / (kg·K), 2.0 kJ / (kg·K), 2.1 kJ / (kg·K), 2.2 kJ / (kg·K), 2.3 kJ / (kg·K), 2.5 kJ / (kg·K), 2.6 kJ / (kg·K), 2.8 kJ / (kg·K), 3.0 kJ / (kg·K), 3.2 kJ / (kg·K), 3.5 kJ / (kg·K), 3.6 kJ / (kg·K), 3.8 kJ / (kg·K).

[0237] For example, if the specific heat capacity of the aerosol-generating substrate segment 10 is lower than 1.0 kJ / (kg·K), the temperature of the aerosol-generating substrate segment 10 rises too fast at the periphery of the heating ring, which can cause problems such as structural collapse and charring of the aerosol-generating substrate segment 10, affecting the release of smoking components and the generation of unpleasant odors; if the specific heat capacity of the aerosol-generating substrate segment 10 is higher than 3.8 kJ / (kg·K), the temperature of the aerosol-generating substrate segment 10 at the periphery can rise too slowly, resulting in a small initial amount of smoke.

[0238] By setting the specific heat capacity of the aerosol-generating substrate segment 10 to be within the range of 1.0 kJ / (kg·K) to 3.8 kJ / (kg·K), the temperature rise of the aerosol-generating substrate segment 10 can be appropriate, so that the evaporation rate of volatile components (mainly aroma components) of the aerosol-generating substrate segment 10 is adapted to the generation rate of the aerosol, improving the consistency of aroma and smoke amount before and after smoking. In addition, the heat transfer rate between the aerosol-generating substrate segments 10 can be appropriate, reducing the temperature difference between the region of the aerosol-generating substrate segment 10 close to the heat source and the region far from the heat source, and improving the problems of increased release of burnt taste substances, structural collapse and charring of the aerosol-generating substrate segment 10 caused by local overheating, and the problems of insufficient extraction (reduced release of effective components) and small initial amount of smoke caused by local low temperature.

[0239] In an embodiment, the elastic recovery rate of the substrate unit 11 is within the range of 76% to 98%. Here, it refers to the elastic recovery rate in the radial direction of the substrate unit 11.

[0240] The elastic recovery rate of the medium carrier in the radial direction refers to the percentage of the original shape or size that the medium carrier can recover after deformation under external force and removal of the external force. The core principle is based on the elastic mechanical properties of the material, and a higher value indicates stronger resistance to permanent deformation.

[0241] By setting the elastic recovery rate of the medium carrier in the radial direction to be in the range of 76% to 98%, the structural strength, stability, and porosity of the medium carrier can be considered.

[0242] In an embodiment, the hardness of the matrix unit 11 is in the range of 70% to 95%. Here, it refers to the radial hardness of the matrix unit 11.

[0243] The radial hardness is a mechanical property index of the medium carrier that locally resists indentation deformation, reflecting the ability of the medium carrier to resist surface deformation under pressure.

[0244] The radial hardness of the medium carrier can be measured by indentation method: applying radial pressure to the surface of the medium carrier, and calculating the hardness value according to the indentation depth or area.

[0245] By setting the radial hardness of the medium carrier to be in the range of 70% to 95%, the structural strength, stability, and porosity of the medium carrier can be considered.

[0246] In an embodiment, the tensile strength of the matrix unit 11 in the first direction is in the range of 1 kN / m to 8 kN / m.

[0247] Tensile strength, also known as tensile strength or breaking strength, is the breaking force per unit area.

[0248] The tensile strength is the maximum load that causes the matrix unit 11 to break in the first direction from the original cross-section.

[0249] The measurement standard can use a horizontal tensile strength measuring instrument.

[0250] The tensile strength of the matrix unit 11 in the first direction can be any one of 1 kN / m, 1.5 kN / m, 2 kN / m, 2.5 kN / m, 3 kN / m, 3.5 kN / m, 4 kN / m, 4.5 kN / m, 5 kN / m, 5.5 kN / m, 6 kN / m, 6.5 kN / m, 7 kN / m, 7.5 kN / m, 8 kN / m, or any point value between any two of them.

[0251] Here, by setting the tensile strength of the substrate unit 11 in the first direction to be in the range of 1 kN / m to 8 kN / m, the situation that the substrate unit 11 is broken and falls off can be improved, which is conducive to improving the amount of smoke, the stability of smoking and the yield. In addition, the aerosol generating substrate segment 10 can also be a homogeneous system, which is conducive to the continuous and uniform generation of aerosol.

[0252] In an embodiment, the tensile strength of the substrate unit 11 in the direction perpendicular to the first direction is in the range of 0.05 kN / m to 3 kN / m.

[0253] The tensile strength of the substrate unit 11 in the direction perpendicular to the first direction can be a point value of any one of 0.05 kN / m, 0.06 kN / m, 0.07 kN / m, 0.08 kN / m, 0.09 kN / m, 0.1 kN / m, 0.15 kN / m, 0.2 kN / m, 0.25 kN / m, 0.3 kN / m, 0.35 kN / m, 0.4 kN / m, 0.5 kN / m, 0.6 kN / m, 0.7 kN / m, 0.8 kN / m, 0.9 kN / m, 1 kN / m, 2 kN / m, 3 kN / m or a point value between any two of them.

[0254] Here, by setting the tensile strength of the substrate unit 11 in the direction perpendicular to the first direction to be in the range of 0.05 kN / m to 3 kN / m, the structural strength and porosity of the substrate unit 11 can be considered.

[0255] It should be noted that there are many specific structural forms of the aerosol generating substrate segment 10.

[0256] In an embodiment, the medium carrier has a columnar structure, and the aerosol generating substrate segment 10 is composed of a single medium carrier.

[0257] The columnar structure can be a circular cylinder (i.e. the cross-sectional shape is circular), a prism (i.e. the cross-sectional shape is polygonal), an elliptical cylinder (i.e. the cross-sectional shape is elliptical) or an irregular column, etc., which is not limited here.

[0258] Here, in the cross section perpendicular to the first direction, the ratio of the sum of the cross-sectional areas of all the airflow channels 21a with an equivalent diameter in the range of 0.01 mm to 0.3 mm to the cross-sectional area of the medium carrier is in the range of 10% to 60%. In this way, the suction resistance of the medium carrier can be appropriate, which is conducive to the generation and migration of aerosol and has a certain stiffness.

[0259] In an embodiment, referring to FIGS. 6 and 7, the medium carrier has a columnar structure, and the aerosol generating substrate segment 10 is formed by gathering a plurality of medium carriers.

[0260] Here, the plurality of medium carriers can be arranged in parallel or can be wound around each other.

[0261] It can be understood that the number of medium carriers is the same as the number of matrix units 11.

[0262] It should be noted that the number of medium carriers of the aerosol generating substrate segment 10 is not limited. In some embodiments, the number of medium carriers is in the range of 2 to 30.

[0263] For example, referring to FIG. 6, the number of medium carriers is 21.

[0264] For example, referring to FIG. 7, the number of medium carriers is 14.

[0265] By controlling the number of medium carriers in the range of 2 to 30, the aerosol generating substrate segment 10 is facilitated to be formed by gathering, and at the same time, when the equivalent diameter of the aerosol generating substrate segment 10 is constant, the equivalent diameter of a single medium carrier is not too small, thereby facilitating the production of the medium carrier.

[0266] In an embodiment, the shape of the cross section of the medium carrier includes at least one of a circle, a semicircle, an ellipse, a regular polygon, an irregular polygon, and a sector.

[0267] Here, all the medium carriers of one aerosol generating substrate segment 10 can be of the same shape, or the shape of the cross section of at least two medium carriers can be different.

[0268] For example, referring to FIG. 6, the shape of the cross section of all the medium carriers is a circle.

[0269] For example, referring to FIG. 7, the shape of the cross section of all the medium carriers is a regular hexagon.

[0270] In an embodiment, the diameter of each medium carrier is in the range of 0.05 mm to 5 mm. For example, it can be 0.05 mm, 0.07 mm, 0.09 mm, 0.1 mm, 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 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, and the like. In this way, the equivalent diameter of the medium carrier is not too small, which is conducive to the processing and forming of the medium carrier; at the same time, the equivalent diameter of the medium carrier is not too large, which is conducive to reducing the porosity of the aerosol generating substrate segment 10 and increasing the content of the load in the unit volume of the aerosol generating substrate segment 10 when the plurality of medium carriers are gathered to form the aerosol generating substrate segment 10.

[0271] In an embodiment, referring to Figs. 8-11, the medium carrier is in a sheet structure, and the aerosol-generating substrate segment 10 is formed by winding or folding at least one medium carrier.

[0272] Referring to Figs. 8 or 10, the medium carrier, before being wound or folded, is a sheet material 111 in a sheet structure.

[0273] Referring to Figs. 8 and 9, the substrate unit 11 can be formed by winding or folding one medium carrier.

[0274] Referring to Figs. 10 and 11, the substrate unit 11 can also be formed by winding or folding a plurality of medium carriers. The plurality of sheet materials 111 are stacked along their thickness direction and then wound or folded.

[0275] The aerosol-generating substrate segment 10 can have only one substrate unit 11 or a plurality of substrate units 11.

[0276] In an embodiment, referring to Figs. 8-11, the thickness of the medium carrier is in the range of 0.5-3 mm. For example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 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, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0277] In this embodiment, the thickness of the medium carrier is appropriate, which facilitates winding or folding of the medium carrier and reduces the processing difficulty. Meanwhile, under the condition that the equivalent diameter of the substrate unit 11 is constant, the number of times of winding or folding of the medium carrier is small, which is conducive to ensuring the processing efficiency of the substrate unit 11.

[0278] In an embodiment, referring to Figs. 8-11, the size of the medium carrier in the first direction is in the range of 10-150 mm. For example, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, 125 mm, 130 mm, 135 mm, 140 mm, 145 mm, 150 mm, etc.

[0279] In one embodiment, referring to FIGS. 8 and 10, the size of the medium carrier in the second direction is in the range of 24 mm to 354 mm, where the second direction is orthogonal to the first direction and the thickness direction of the medium carrier. For example, it can be 24 mm, 34 mm, 44 mm, 54 mm, 64 mm, 74 mm, 84 mm, 94 mm, 104 mm, 114 mm, 124 mm, 134 mm, 144 mm, 154 mm, 164 mm, 174 mm, 184 mm, 194 mm, 204 mm, 214 mm, 224 mm, 234 mm, 244 mm, 254 mm, 264 mm, 274 mm, 284 mm, 294 mm, 304 mm, 314 mm, 324 mm, 334 mm, 344 mm, 354 mm, etc.

[0280] Specifically, the second direction is the direction indicated by L2 in FIGS. 8 and 10.

[0281] In one embodiment, referring to FIG. 12, the aerosol generating substrate segment 10 includes at least two substrate units 11, the at least two substrate units 11 including a first substrate unit and a second substrate unit, the first substrate unit being formed of a medium carrier in a columnar shape, and the second substrate unit being formed of at least one medium carrier in a sheet shape being wound or folded.

[0282] In this way, the aerosol generating substrate segment 10 has at least two types of substrate units 11, and the aerosol generating substrate segment 10 can integrate the beneficial effects of the various types of substrate units 11, thereby being advantageous in improving the overall performance of the aerosol generating substrate segment 10.

[0283] In one embodiment, the diameter of the aerosol generating substrate segment 10 is in the range of 4 mm to 15 mm.

[0284] The diameter of the aerosol generating substrate segment 10 can be a point value of any one of 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or a point value between any two of them.

[0285] Here, the diameter of one substrate unit 11 can be in the range of 4 mm to 15 mm. Alternatively, the diameter of the aerosol generating substrate segment 10 after the plurality of substrate units 11 are gathered can be in the range of 4 mm to 15 mm.

[0286] For example, the plurality of substrate units 11 can be compressed and put into a forming paper tube, or two or more of them can be spliced into a columnar or cuboid shape, gathered, and then compressed and put into a forming paper tube.

[0287] In an embodiment, referring to FIGS. 16 to 18, the equivalent diameter of the airflow passage 21a gradually increases from the distal lip end of the aerosol generating substrate segment 10 to the proximal lip end of the aerosol generating substrate segment 10.

[0288] The proximal lip end refers to an end close to the user's lips when the aerosol generating article is used, and the distal lip end refers to an end away from the user's lips when the aerosol generating article is used.

[0289] As such, it is advantageous to reduce the flow rate of air, to facilitate the air to carry more aerosol and exit from the proximal lip end of the aerosol generating substrate segment 10, and thus, it is advantageous to increase the content of aerosol in each puff, thereby facilitating the user's satisfaction with the draw.

[0290] In an embodiment, referring to FIGS. 14 and 15, the equivalent diameter of each airflow passage 21a gradually increases or decreases along the radial direction of the aerosol generating substrate segment 10 from the inside to the outside on the same cross section of the aerosol generating substrate segment 10.

[0291] As such, the aerosol generating substrate segment 10 can be appropriately structured to match the central heating type aerosol generating device or the peripheral heating type aerosol generating device.

[0292] Furthermore, it is advantageous to facilitate more airflow to flow through the central region of the aerosol generating substrate segment 10, thereby generating a concentration effect, and to increase the aerosol concentration per draw.

[0293] In an embodiment, the aerosol generating substrate segment 10 has a high load region and a low load region on the cross section of the aerosol generating substrate segment 10, and the low load region is circumferentially disposed outside the high load region.

[0294] Here, the aerosol generating substrate segment 10 can match the central heating type aerosol generating device, and the high load region is close to the heating assembly. Since the region close to the heating assembly is heated more, by providing the high load region, it is advantageous to facilitate the sufficient volatilization of the load, and in the peripheral region of the aerosol generating substrate segment 10, the heat received is relatively low, and by providing the low load region, it is advantageous to reduce the waste of the load.

[0295] In an embodiment, a loose region is provided at the axis of the aerosol generating substrate segment 10. As such, based on the central heating type aerosol generating device, the heating assembly is facilitated to be inserted into the aerosol generating substrate segment 10 through the position of the axis of the aerosol generating substrate segment 10, thereby heating the aerosol generating substrate segment 10 from the inside to the outside.

[0296] In one embodiment, referring to FIG. 13, the aerosol generating substrate segment 10 is provided with a heating hole 10a for inserting the heating assembly. In this way, the heating assembly is inserted into the aerosol generating substrate segment 10, thereby achieving the roasting of the aerosol generating substrate segment 10 from the inside to the outside.

[0297] It should be noted that the specific shape of the cross section of the heating hole 10a is not limited. In some embodiments, the shape of the cross section of the heating hole 10a is circular or "cross" shaped.

[0298] Exemplarily, referring to FIG. 13, the shape of the cross section of the heating hole 10a is circular.

[0299] The present application provides a foamed bamboo material, which is formed by foaming natural bamboo material. The foamed bamboo material has a plurality of natural pores 11a penetrating in a first direction, the average equivalent diameter of all the natural pores 11a with an equivalent diameter greater than or equal to 10 μm is in the range of 0.05 mm to 0.8 mm, the density of the foamed bamboo material is in the range of 0.05 g / cm 3 to 0.3 g / cm 3 , and the porosity of the foamed bamboo material is greater than or equal to 50%. The natural bamboo material has natural pores 11a in its growth direction, and the first direction is the growth direction of the bamboo material.

[0300] The natural pores 11a form an airflow channel, which refers to a channel structure in the foamed bamboo material that can be used for airflow circulation on the basis of the natural channel of the natural bamboo material. That is, the average equivalent diameter of all the airflow channels with an equivalent diameter greater than or equal to 10 μm is in the range of 0.05 mm to 0.8 mm.

[0301] The average equivalent diameter of all the natural pores 11a with an equivalent diameter greater than or equal to 10 μm is in the range of 0.05 mm to 0.8 mm, and the specific average equivalent diameter is not limited herein, for example, it can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, and the like.

[0302] Here, taking the foamed bamboo material used to form the aerosol generating substrate segment 10 as an example, the foamed bamboo material is the medium carrier of the aerosol generating substrate segment 10. If the average equivalent diameter of all the airflow channels with an equivalent diameter greater than or equal to 10 μm is too small, the draw resistance of the foamed bamboo material after loading the load will be large, and the draw resistance may be small during use, and the load will also be reduced, affecting the consistency of the taste; if the average equivalent diameter is too large, the draw resistance of the foamed bamboo material will be small, and the load of the aerosol generating medium on the load will be reduced. By setting the average equivalent diameter of all the airflow channels with an equivalent diameter greater than or equal to 10 μm to be in the range of 0.05 mm to 0.8 mm, the draw resistance of the aerosol generating substrate segment 10 can be appropriately, and the load of the aerosol generating substrate segment 10 on the load is moderate, which is beneficial to improve the smoking experience.

[0303] The density of the foamed bamboo material is in the range of 0.05 g / cm 3 to 0.3 g / cm 3 , and the specific density is not limited herein, for example, it can be 0.05 g / cm 3 , 0.06 g / cm 3 , 0.07 g / cm 3 , 0.08 g / cm 3 , 0.09 g / cm 3 , 0.1 g / cm 3 , 0.15 g / cm 3 , 0.2 g / cm 3 , 0.25 g / cm 3 , 0.3 g / cm 3 , and the like.

[0304] Here, taking the foamed bamboo material used to form the aerosol generating substrate segment 10 as an example. When the density of the foamed bamboo material is too large, it can cause the draw resistance of the aerosol generating substrate segment 10 to be large, the smoke amount to be small, and the generation and migration of aerosol to be greatly limited; when the density of the foamed bamboo material is too small, it can cause the stiffness of the aerosol generating substrate segment 10 to be insufficient, the smoke amount to be small, the consistency of the aerosol generating substrate segment 10 to be poor, and the smoking satisfaction to be low. By setting the density of the foamed bamboo material to be in the range of 0.05 g / cm 3 to 0.3 g / cm 3 , the draw resistance of the aerosol generating substrate segment 10 can be appropriate, and it has a certain stiffness and smoke amount, which is beneficial to improve the consistency of the aerosol generating substrate segment 10 and the smoking satisfaction.

[0305] The porosity of the foamed bamboo material is greater than or equal to 50%, and the specific porosity is not limited herein, for example, it can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, and the like.

[0306] Here, taking the foamed bamboo material for forming the aerosol generating substrate segment 10 as an example. When the porosity of the foamed bamboo material is too small, it can cause the suction resistance of the aerosol generating substrate segment 10 to be too large, which has a greater limitation on the generation and migration of aerosol. By setting the porosity of the foamed bamboo material to be greater than or equal to 50%, the suction resistance of the aerosol generating substrate segment 10 can be appropriately made, and a certain amount of smoke can be obtained, which is beneficial to improve the satisfaction of smoking.

[0307] Here, the porosity of the foamed bamboo material refers to the percentage of the volume of natural pores 11a (air flow channels) and micropores in the total volume of the foamed bamboo material.

[0308] The foamed bamboo material described above can be applied in the fields of medical treatment, daily life, and heating non-combustible medium.

[0309] The foamed bamboo material provided by the embodiments of the present application is made of natural bamboo material, which has a plurality of natural pores 11a. The natural bamboo material is subjected to foaming treatment to obtain the foamed bamboo material. In this way, the foamed bamboo material has a porous structure, and the porous structure forms an air flow channel in which air flow can flow. In addition, the air flow channel can adsorb liquid, so that the foamed bamboo material has good liquid adsorption capacity. The average equivalent diameter, porosity, and density of part of the air flow channel of the foamed bamboo material are set in a certain range, which is beneficial to improve the air guiding capacity and adsorption capacity of the foamed bamboo material.

[0310] In some embodiments, the natural bamboo material is subjected to foaming treatment, and the relative standard deviation of the equivalent diameter of the natural pores 11a is less than or equal to 30%. It should be noted that the natural bamboo material itself has a plurality of natural pores 11a along its growth direction, and the foaming treatment does not additionally increase the natural pores 11a. Instead, the bamboo material on the wall of the natural pores 11a is foamed to change its performance, pore structure, and other forms.

[0311] The relative standard deviation of the equivalent diameter of the natural pores 11a of the foamed bamboo material is less than or equal to 30%, and the specific relative standard deviation is not limited here. For example, it can be 5%, 10%, 15%, 20%, 25%, 30%, and the like.

[0312] Here, the relative standard deviation of the equivalent diameters of the natural gas holes 11a is a statistical quantity used to measure the dispersion degree of the equivalent diameter data of a group of natural gas holes 11a. The smaller the relative standard deviation of the equivalent diameters, the more concentrated the equivalent diameter data, that is, the smaller the difference between each equivalent diameter value and the average value, and the more uniform the equivalent diameter distribution. Conversely, the larger the relative standard deviation, the greater the dispersion degree of the equivalent diameter data, the more uneven the equivalent diameter distribution, and there may be some extreme equivalent diameter values that are larger or smaller. When comparing the uniformity of the equivalent diameters of porous materials prepared in different batches or by different processes, the relative standard deviation is a very useful indicator. By controlling the process parameters to make the relative standard deviation of the equivalent diameters of the product smaller, a material with more stable and uniform performance can be obtained. A smaller relative standard deviation means that the pore structure of the material is more consistent.

[0313] The present application provides an aerosol generating substrate segment 10, which comprises a load and a foamed bamboo material of any one of the embodiments of the present application. The load at least comprises an aerosol generating agent, and the foamed bamboo material is used to load the load. That is, the foamed bamboo material serves as the aforementioned medium carrier.

[0314] The aerosol generating substrate segment 10 is a substance capable of generating an aerosol, which refers to a gaseous dispersion system composed of solid or liquid particles suspended in a gaseous medium. In the field of new tobacco products and the like, the aerosol generating substrate segment 10 will generate an aerosol for users to inhale under the condition of heating or the like.

[0315] It should be noted that the aerosol generating substrate segment 10 of the embodiments of the present application can be suitable for smoking in a lit mode, or can be suitable for smoking in a heat-not-burn mode.

[0316] The load is a substance carried on the foamed bamboo material, which contains at least one aerosol generating agent and plays a key role in the aerosol generating process.

[0317] Exemplarily, in addition to the aerosol generating agent, the load can also add substances such as flavors and flavorings to enrich the taste and aroma of the aerosol. The flavor can be a natural plant extract, such as a mint extract to bring a cooling taste, and a fruit extract to impart a fruit aroma.

[0318] The aerosol generating agent is a substance that can be converted into an aerosol under certain conditions, such as propylene glycol, glycerol, etc. They vaporize to form an aerosol when heated, and are the main components of the aerosol.

[0319] The porous structure of the foamed bamboo material can effectively load various loadings, so that the aerosol generating agent, flavoring agent and other substances are uniformly distributed, and a stable and high-quality aerosol is generated when heated, thereby improving the experience of a user. According to different requirements, the components and proportions of the loadings and the properties of the foamed bamboo material can be flexibly adjusted, and aerosol generating substrate sections 10 with different flavors and effects can be developed to meet diversified market demands.

[0320] The embodiment of the present application provides a preparation method of foamed bamboo material. Referring to FIG. 22, a flowchart of the preparation method of foamed bamboo material, the preparation method of foamed bamboo material comprises the following steps S101 to S105:

[0321] In step S101, bamboo pieces are prepared.

[0322] In step S102, the bamboo pieces are placed in a cooking solution for cooking.

[0323] In step S103, the cooked bamboo pieces are subjected to freezing treatment.

[0324] In step S104, the bamboo pieces after freezing treatment are soaked in a foaming solution.

[0325] In step S105, the soaked bamboo pieces are subjected to foaming treatment to obtain foamed bamboo material.

[0326] In step S101, the bamboo pieces are formed by cutting and processing bamboo into a sheet structure, which is the basic raw material for preparing foamed bamboo material, and the fiber properties and natural pores 11a of the bamboo are retained. The bamboo pieces are processed from natural bamboo and can be in a sheet or strip shape. The bamboo has a unique fiber structure, so that the foamed bamboo material has certain strength and toughness. After specific preparation processes such as cooking and foaming, the foamed material with good pore structure can be formed on the basis of maintaining part of the original performance of the bamboo material, has high porosity and low density, and can also have good heat insulation and sound insulation properties.

[0327] The type of bamboo is not limited here, and generally, bamboo with a certain wall thickness is selected as the raw material for making bamboo pieces to obtain bamboo pieces with sufficient thickness for subsequent processing. For example, Phyllostachys pubescens or Dendrocalamus giganteus can be selected. According to the size and specifications of the required bamboo pieces, cutting, deburring and other processing methods are used to process the bamboo into bamboo pieces. Preparing bamboo pieces is the beginning of the entire preparation process, and the quality of the bamboo pieces directly affects the performance of the final foamed bamboo material.

[0328] In step S102, the cooking solution is prepared by mixing water and various chemical additives, and is used for cooking the bamboo pieces. The cooking solution is used for directional degradation and dissolution of lignin and hemicellulose in the bamboo pieces, so as to form a loose and porous structure under the premise of maintaining the bamboo skeleton, and facilitate the penetration of the subsequent foaming solution.

[0329] The prepared bamboo pieces are placed into a steaming device and a steaming liquid is added. Under a specific temperature and pressure environment, the bamboo pieces are steamed for a period of time to soften the fibers of the bamboo pieces, facilitating subsequent processing.

[0330] In some embodiments, a chemical substance capable of removing sugar, starch and other perishable substances in the bamboo pieces can also be added to enhance the corrosion resistance of the bamboo pieces. The steaming process allows the effective components in the steaming liquid to enter the bamboo pieces, improving the performance of the bamboo pieces.

[0331] In step S103, the fibers of the steamed bamboo pieces contain water. The steamed bamboo pieces are subjected to a freezing treatment. The water between the fibers freezes, and the gaps between the fibers are expanded by the volume expansion of the ice, making the narrow space between the fibers wide. After the freezing treatment, when the bamboo pieces are taken out of the low-temperature environment and thawed, the ice will re-melt into water, and the space occupied by the ice will form cavities due to water loss. The formation of these cavities is conducive to the formation of the pore structure between the fibers of the bamboo pieces.

[0332] In step S104, the foaming liquid contains a foaming agent and other additives to facilitate the formation of a foamed structure in the bamboo pieces in subsequent processing. The foaming agent can generally decompose to produce gas under specific conditions, forming pores in the bamboo pieces. The frozen bamboo pieces are completely immersed in the foaming liquid to allow the foaming liquid to penetrate into the fibers of the bamboo pieces, preparing for subsequent foaming. After a period of soaking, the foaming liquid can penetrate into various parts of the fibers of the bamboo pieces.

[0333] In step S105, the foaming treatment refers to applying specific conditions such as heating and pressurization to the bamboo pieces soaked in the foaming liquid, causing the foaming agent in the foaming liquid to decompose and produce gas, forming pores in the bamboo pieces, and thus obtaining foamed bamboo pieces. By heating and pressurizing the bamboo pieces soaked in the foaming liquid, the foaming agent decomposes to produce gas, forming numerous pores in the bamboo pieces, and obtaining foamed bamboo pieces with specific structure and performance.

[0334] Foamed materials are porous materials with countless bubble pores inside. Existing foamed materials are mainly prepared from plastics, rubbers and other raw materials. In related technologies, bamboo is also used to make foamed bamboo pieces, but the foamed bamboo pieces are basically prepared from crushed bamboo powder, bamboo fibers and other polymers. The main skeleton of the foamed bamboo pieces is still plastic or rubber material, and the prepared foamed bamboo pieces have problems such as small equivalent diameter, poor consistency of equivalent diameter and high density, resulting in poor performance of the foamed bamboo pieces and failing to meet the use requirements of people.

[0335] The foamed bamboo preparation method provided by the embodiments of the present application boils the bamboo pieces in a boiling solution, degrades and dissolves lignin and hemicellulose in the bamboo pieces through the boiling solution, and softens the bamboo piece fibers, thereby forming a loose and porous structure, laying a foundation for subsequent foaming treatment, helping to improve the porosity of the foamed bamboo and reduce the foaming difficulty. After boiling the bamboo pieces, the frozen bamboo pieces are treated by using the expansion of the water ice volume to promote the formation of the pore structure between the bamboo piece fibers. The frozen bamboo pieces are soaked in a foaming solution, and then foaming treatment is performed, the foaming agent in the foaming solution decomposes to generate gas, and pores are formed in the bamboo, thereby obtaining foamed bamboo. By controlling various parameters in the boiling and foaming processes, the performance parameters of the natural pores 11a of the foamed bamboo, such as the equivalent diameter and porosity, can be regulated, which is conducive to obtaining foamed bamboo with large equivalent diameter of the natural pores 11a, good consistency of the equivalent diameter, and low density, and meets different use requirements of people. In addition, the preparation method is simple to operate and is conducive to large-scale industrial production.

[0336] In some embodiments, step S102 comprises the following steps:

[0337] The bamboo pieces are placed in a boiling device, the rotation of the boiling device is controlled, and the bamboo pieces are boiled, and the rotation speed of the boiling device is in the range of 0.5 r / min to 3 r / min.

[0338] The boiling device is a device specially used for boiling materials, generally has the functions of heating, temperature control, sealing, etc., and is used to boil the bamboo pieces in the present scheme. The boiling device rotates around the axis center to change the position of the bamboo pieces in the device.

[0339] Exemplarily, a rotatable drum-type boiling pot is used as the boiling device. The pot body is cylindrical and can accommodate the bamboo pieces and the boiling solution.

[0340] In some embodiments, the boiling device is composed of a rotation driving system, a heating system, a temperature control system, and an inlet and outlet device. The rotation driving system is composed of a motor, a speed reducer, and a transmission chain, which provides power for the rotation of the pot body. The heating system can use electric heating or steam heating to provide heat for the boiling process. The temperature control system uses a temperature sensor and a controller to accurately control the boiling temperature.

[0341] The prepared bamboo pieces are put into the boiling device to prepare for boiling. During the boiling process, the boiling device rotates around a specific axis center, and at the same time, the bamboo pieces are boiled, so that the bamboo pieces can be uniformly heated and contacted with the boiling solution.

[0342] When the cooking device rotates, the bamboo chips continuously change their positions in the device, improving the situation of local overheating or insufficient heating, so that each part of the bamboo chips can be fully and uniformly heated, improving the cooking effect of the bamboo chips and maintaining stable quality. The continuous change of the position of the bamboo chips makes their contact with the cooking liquid more comprehensive and sufficient, accelerates the penetration of the cooking liquid into the internal fibers of the bamboo chips, and improves the degradation efficiency of lignin and hemicellulose, creating good conditions for the subsequent foaming process. In addition, uniform heating and contact with the cooking liquid can shorten the cooking time, thereby improving the efficiency of the entire production process, reducing time costs, and being suitable for large-scale industrial production.

[0343] The rotation speed of the cooking device is in the range of 0.5 r / min to 3 r / min, and the specific speed is not limited herein, for example, it can be 0.5 r / min, 0.6 r / min, 0.8 r / min, 1 r / min, 1.2 r / min, 1.5 r / min, 1.8 r / min, 2 r / min, 2.2 r / min, 2.5 r / min, 2.8 r / min, 3 r / min. By comparing the cooking effect of the bamboo chips at different speeds, including the softening degree of the bamboo chip fibers, the penetration depth of the cooking liquid, and the degradation proportion of lignin and hemicellulose, the most suitable cooking pot rotation speed is determined to provide data support for the industrialized production of foamed bamboo.

[0344] In some embodiments, the cooking liquid includes, by weight fraction: 67 to 90 parts of water, 8 to 23 parts of sodium sulfite, and 2 to 10 parts of p-toluenesulfonic acid.

[0345] Here, it should be noted that the weight fraction is a relative measurement method used to represent the proportional relationship of each component in the mixture, and does not represent the specific mass value, which is beneficial for convenient design and adjustment of the formula. In particular, the sum of the fractions of water, sodium sulfite and toluenesulfonic acid here is 100 parts.

[0346] As a solvent, water provides a dissolution environment for chemical substances such as sodium sulfite and p-toluenesulfonic acid, allowing them to disperse uniformly, and then fully contact and penetrate into the bamboo chip fibers. Water produces steam at high temperatures, which helps to soften the bamboo chip fibers and accelerate the cooking reaction.

[0347] Sodium sulfite is a chemical substance with reducing properties. During the cooking process, it reacts with lignin in the bamboo chips, causing the lignin structure to decompose and reducing its degree of polymerization, making lignin more easily dissolved in the cooking liquid, achieving the separation of lignin from cellulose and hemicellulose, and achieving the effect of delignification. This not only softens the bamboo chip fibers to facilitate subsequent processing, but also enhances the flexibility of the bamboo, which helps to form a uniform pore structure during foaming. In addition, the strong reducing property of sodium sulfite can prevent the bamboo chips from being oxidized during high-temperature cooking, maintaining the stability of the physical and chemical properties of the bamboo chips.

[0348] p-toluenesulfonic acid as a strong organic acid provides an acidic environment in the cooking process, accelerates the hydrolysis reaction of lignin and hemicellulose, accelerates their dissolution from bamboo chips, further improves the delignification effect, and assists sodium sulfite in softening bamboo chip fibers.

[0349] Within the above range of proportions, the producer can flexibly adjust the cooking liquor formula according to the specific situation of the bamboo chips and the product requirements, improve the adaptability of the process, and meet different production needs. By adjusting the proportion of each component, the use amount of raw materials can be reasonably controlled under the premise of ensuring the cooking effect, unnecessary waste can be avoided, and production costs can be reduced. Water, sodium sulfite and toluenesulfonic acid work together to help degrade lignin and hemicellulose in bamboo chips, soften bamboo chip fibers, and form a loose and porous structure, creating good conditions for the subsequent penetration and foaming treatment of the foaming liquid, and improving the quality of foamed bamboo.

[0350] In some embodiments, the cooking liquor further includes 0.5 to 3 parts by weight of an anthraquinone solution, and the mass fraction of the anthraquinone solution is in the range of 0.03% to 0.07%.

[0351] The specific parts of the anthraquinone solution are not limited here, for example, it can be 0.5 parts, 1 part, 1.5 parts, 1.7 parts, 2 parts, 2.5 parts, 3 parts, etc.

[0352] The specific mass fraction of the anthraquinone solution is not limited here, for example, it can be 0.03%, 0.035%, 0.04%, 0.045%, 0.05%, 0.055%, 0.06%, 0.065%, 0.07%, etc.

[0353] For different types and thicknesses of bamboo chips, the mass fraction of the anthraquinone solution can be fine-tuned within this range. For example, for bamboo chips with hard texture and high lignin content, an anthraquinone solution with a mass fraction close to 0.07% can be used to improve the cooking effect; for thinner bamboo chips with relatively low lignin content, an anthraquinone solution with a mass fraction close to 0.03% can be used to reduce the possibility of over-reaction.

[0354] As a cooking aid, anthraquinone can accelerate the reaction speed of delignification during the cooking process, while inhibiting the over-degradation of cellulose, maintaining the strength and toughness of the bamboo chips. In the synergistic effect with sodium sulfite, anthraquinone promotes the oxidation-reduction reaction of lignin, shortens the cooking time, reduces the amount of chemical drugs, reduces production costs, improves production efficiency, and helps to realize the greenization of the cooking process.

[0355] By controlling the mass fraction of the anthraquinone solution within a certain range, it helps to improve the stability and controllability of the cooking process, and to maintain the quality of foamed bamboo produced in different batches, thereby reducing the rate of defective products.

[0356] In some embodiments, the foaming liquid comprises, by weight parts: 35 to 90 parts of water, 1 to 23 parts of sodium bicarbonate, and 5 to 15 parts of hydrogen peroxide solution, the mass fraction of the hydrogen peroxide solution being in the range of 25% to 35%.

[0357] Here, the sum of the parts of water, sodium bicarbonate and hydrogen peroxide solution is 100 parts.

[0358] Water as a solvent can make sodium bicarbonate and hydrogen peroxide and other substances uniformly dispersed in the foaming liquid, so that the components are in full contact, creating conditions for subsequent chemical reactions. When heated, water becomes water vapor, not only occupying a certain space, but also assisting the gas generated by the decomposition of sodium bicarbonate and hydrogen peroxide solution to form pores inside the bamboo chips, and can also generate pressure to promote the uniform distribution of gas inside the bamboo chips.

[0359] Sodium bicarbonate decomposes to produce carbon dioxide gas, which is the main gas source for forming pores inside the bamboo chips. A large amount of carbon dioxide gathered inside the bamboo chips promotes the formation of a porous structure in the bamboo chips, achieving foaming.

[0360] The hydrogen peroxide solution decomposes to produce oxygen under certain conditions, increasing the total amount of gas during the foaming process, and working together with carbon dioxide to form a more abundant and uniform pore structure inside the bamboo chips, improving the porosity and quality of the foamed bamboo. In addition, hydrogen peroxide as a strong oxidizing agent can oxidize some organic matter inside the bamboo chips, improve the surface properties and internal structure of the bamboo chips, and help the foaming liquid penetrate better into the bamboo chips, forming more uniform and stable pores during the foaming process, and improving the overall performance of the foamed bamboo.

[0361] The specific mass fraction of the hydrogen peroxide solution is not limited here, for example, it can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, etc.

[0362] Controlling the mass fraction of the hydrogen peroxide solution within this range helps to stabilize the performance of the foaming liquid, reduces the problem of unstable foaming effect caused by fluctuations in the content of hydrogen peroxide, and improves the stability of the quality of foamed bamboo of different batches.

[0363] Within the above range of proportions, producers can flexibly adjust the foaming liquid formula according to the types, thickness, density of the bamboo chips and the performance of the desired foamed bamboo, improve the process adaptability, and meet different production needs. By reasonably adjusting the proportion of each component, not only can the foaming effect be guaranteed, but also the amount of raw materials can be controlled to avoid waste and reduce production costs.

[0364] In some embodiments, the soaking temperature of the foaming liquid is in the range of 20°C to 90°C, and the specific temperature is not limited herein, for example, it can be 20°C, 25°C, 30°C, 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, and the like.

[0365] In the temperature range of 20°C to 90°C, the chemical substances in the foaming liquid can maintain good activity and fully react with the bamboo chips, so that a uniform and stable pore structure is formed inside the bamboo chips, thereby improving the quality and performance of the foamed bamboo.

[0366] In some embodiments, the soaking time of the foaming liquid is in the range of 2h to 48h, and the specific time is not limited herein, for example, it can be 2h, 3h, 4h, 26h, 28h, 30h, 32h, 34h, 36h, 38h, 40h, 42h, 44h, 46h, 48h, and the like.

[0367] The soaking time of 2h to 48h allows the foaming liquid to penetrate into the interior of the bamboo chip fibers, so that the foaming agent fully reacts with the bamboo chips to form a uniform and stable pore structure, thereby improving the quality and performance of the foamed bamboo.

[0368] In some embodiments, the ratio of the mass of the cooking liquid to the mass of the bamboo chips is in the range of 1.5 to 7, and the specific ratio is not limited herein, for example, it can be 1.5, 2, 2.5, 3, 4, 4.5, 5, 5, 5.5, 6, 6.5, 7, and the like.

[0369] The ratio of the mass of the cooking liquid to the mass of the bamboo chips is in the above range, so that the bamboo chips can be fully immersed in the cooking liquid, and the chemical substances in the cooking liquid can fully react with the bamboo chips to effectively degrade lignin and hemicellulose, soften the bamboo chip fibers, create favorable conditions for subsequent foaming, and improve the quality of the foamed bamboo.

[0370] In some embodiments, the cooking temperature of the bamboo chips is in the range of 60°C to 170°C, and the specific temperature is not limited herein, for example, it can be 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, 115°C, 120°C, 125°C, 130°C, 130°C, 135°C, 140°C, 145°C, 150°C, 155°C, 160°C, 165°C, 170°C, and the like.

[0371] The cooking temperature of the bamboo chips is in the above range to promote the degradation of lignin and the decomposition of hemicellulose in the bamboo chips, soften the bamboo chip fibers, form a loose and porous structure, create good conditions for the subsequent penetration and foaming treatment of the foaming liquid, and improve the porosity and quality of the foamed bamboo.

[0372] In some embodiments, the freezing temperature of the freezing treatment of the bamboo pieces is below 0°C, and the specific temperature is not limited herein, for example, it can be -1°C, -5°C, -10°C, -15°C, -18°C, -20°C. The freezing temperature below 0°C is beneficial to the rapid freezing of water between bamboo fibers to cause volume expansion, thereby promoting the formation of pore structure between the fibers of the bamboo pieces.

[0373] In some embodiments, the soaked bamboo pieces are subjected to foaming treatment to obtain foamed bamboo, including the following steps S201 to S202:

[0374] Step S201, the soaked bamboo pieces are subjected to liquid removal treatment;

[0375] Step S202, the bamboo pieces after the liquid removal treatment are subjected to foaming by using a hot-pressing foaming process, the temperature of the hot-pressing foaming process is in the range of 140°C to 200°C, and the time of the hot-pressing foaming process is in the range of 5 min to 10 min.

[0376] In step S201, the liquid removal treatment refers to removing the excess foaming liquid adhered to the surface of the bamboo pieces by a specific method, improving the subsequent foaming effect affected by too much foaming liquid, and improving the stability of the foaming process.

[0377] The liquid removal treatment can reduce the defects on the surface of the bamboo pieces caused by too much foaming liquid in the hot-pressing foaming process, thereby improving the appearance and performance of the product. In addition, the foaming liquid after the liquid removal treatment can be collected for recycling, which can reduce the consumption of raw materials, save production costs, and reduce environmental pollution.

[0378] In step S202, the hot-pressing foaming process is a process method for promoting the decomposition of the foaming agent inside the bamboo pieces to produce gas and form pores, thereby obtaining foamed bamboo, by means of heating and applying pressure. By accurately controlling the temperature, pressure and time, this process can form uniform and stable pore structure inside the bamboo pieces, thereby improving the quality of the foamed bamboo.

[0379] According to the thickness, material and the amount of adsorbed foaming liquid of the bamboo pieces, the centrifugal liquid removal time is reasonably adjusted. For the bamboo pieces with large thickness and much adsorbed foaming liquid, the liquid removal time is set to be close to 10 minutes to fully remove the liquid. For the bamboo pieces with thin thickness and little adsorbed foaming liquid, the liquid removal time is set to be close to 5 minutes to improve the damage of the bamboo pieces caused by too long liquid removal time.

[0380] The temperature of the hot-pressing foaming process is in the range of 140°C to 200°C, and the specific temperature is not limited herein, for example, it can be 140°C, 145°C, 150°C, 155°C, 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C, 195°C, 200°C, and the like.

[0381] For different types and thicknesses of bamboo chips, the hot-pressing temperature needs to be reasonably controlled. For example, for bamboo chips with hard texture and dense fibers, the temperature tolerance is strong, and the hot-pressing temperature can be set close to 200°C, thereby accelerating the decomposition rate of the foaming agent and significantly improving the foaming efficiency. For bamboo chips with soft texture and loose fibers, the hot-pressing temperature should be controlled close to 140°C to improve the situation that the fibers of the bamboo chips carbonize and deform, and the pore structure directly collapses due to too high temperature, or the foaming effect is not good due to too low temperature.

[0382] The temperature range of 140°C to 200°C creates a suitable thermodynamic environment for the decomposition of the foaming agent and the generation of gas, which helps to form a uniform and stable pore structure inside the bamboo chips, improve key performance indicators such as porosity and density of the foamed bamboo, and help improve the quality of foaming.

[0383] The hot-pressing time of the hot-pressing foaming process is in the range of 5 minutes to 10 minutes, and the specific time is not limited herein, for example, it can be 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, etc.

[0384] The hot-pressing time range of 5 minutes to 10 minutes allows the foaming agent to fully decompose, and the gas to uniformly diffuse inside the bamboo chips, forming a stable and uniform pore structure, and improving the quality and performance of the foamed bamboo.

[0385] Exemplarily, a hot-pressing machine is used for hot-pressing foaming. The hot-pressing machine is the core equipment of the hot-pressing foaming process, which mainly consists of a heating system, a pressurizing system, and a mold. The heating system is used to provide the required temperature to enable the material and the foaming agent to reach the required conditions for reaction. The pressurizing system applies a certain pressure to ensure the stability of the density and structure of the material during the foaming process. The mold determines the shape and size of the foamed product.

[0386] The dehydrated bamboo chips are placed neatly in the mold to ensure uniform distribution of the bamboo chips and avoid accumulation or gaps that affect the uniformity of foaming.

[0387] The hot-pressing machine is started, for example, at a temperature rising rate of 5 to 10°C / min, to make the temperature in the mold reach the set hot-pressing temperature. In this process, the foaming agent inside the bamboo chips begins to decompose and generate gas.

[0388] When the temperature reaches the set value, the hot-pressing temperature and pressure are kept constant, for example, for 5 to 10 minutes. The gas is allowed to fully diffuse inside the bamboo chips to form a uniform pore structure. After hot-pressing, demolding is performed to obtain the required foamed bamboo.

[0389] The standardized dehydrating process and hot-pressing foaming process reduce the influence of human factors on the foaming effect, ensure the consistency of the quality of different batches of products, and enhance the stability and controllability of the production process.

[0390] In some embodiments, the liquid-removing treatment adopts centrifugal liquid-removing, wherein the rotating speed of the centrifugal liquid-removing is in the range of 20 Hz to 40 Hz, and the specific rotating speed is not limited herein, for example, it can be 20 Hz, 22 Hz, 24 Hz, 26 Hz, 28 Hz, 30 Hz, 32 Hz, 34 Hz, 36 Hz, 38 Hz, 40 Hz, etc.

[0391] The centrifugal liquid-removing refers to a liquid-removing method that utilizes the principle of centrifugal force to make the excess foaming liquid on the surface of the bamboo strip separate from the bamboo strip in the process of high-speed rotation.

[0392] For example, a special industrial centrifuge is selected to perform the centrifugal liquid-removing of the bamboo strip. The centrifuge is equipped with a variable frequency motor, and the rotating speed can be accurately adjusted in the range of 20 Hz to 40 Hz according to the needs.

[0393] The rotating speed of the centrifugal liquid-removing is flexibly adjusted according to the thickness and material of the bamboo strip. For the bamboo strip with large thickness and hard texture, the rotating speed is set to be close to 40 Hz to provide a larger centrifugal force and ensure sufficient liquid-removing. For the bamboo strip with thin thickness and soft texture, the rotating speed is set to be close to 20 Hz to avoid damage to the bamboo strip caused by excessive centrifugal force.

[0394] The liquid-removing time is reasonably set in combination with the rotating speed of the centrifugal liquid-removing. When the rotating speed is low, the liquid-removing time is appropriately prolonged, for example, it is set to be 10 to 15 minutes. When the rotating speed is high, the liquid-removing time is shortened, for example, it is set to be 5 to 8 minutes. At the same time, a sensor installed in the centrifuge is used to monitor the liquid-removing state of the bamboo strip in real time. The preset liquid-removing standard is that the amount of residual foaming liquid on the surface of the bamboo strip is less than a specific threshold value, and the centrifuge is automatically stopped when the standard is reached.

[0395] The rotating speed range of 20 Hz to 40 Hz makes it possible to provide sufficient centrifugal force to remove the excess foaming liquid on the surface of the bamboo strip in the liquid-removing process, and also avoids damage to the structure of the bamboo strip caused by excessive centrifugal force, thereby ensuring the liquid-removing effect and providing good raw material conditions for the subsequent hot-pressing foaming process. In some embodiments, the liquid-removing time of the centrifugal liquid-removing is in the range of 5 min to 10 min, and the specific time is not limited herein, for example, it can be 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, etc.

[0396] The liquid-removing time of the centrifugal liquid-removing is reasonably adjusted according to the thickness, material and amount of absorbed foaming liquid of the bamboo strip. For the bamboo strip with large thickness and much absorbed foaming liquid, the liquid-removing time is set to be close to 10 minutes to ensure sufficient liquid-removing. For the bamboo strip with thin thickness and little absorbed foaming liquid, the liquid-removing time is set to be close to 5 minutes to improve the situation that the bamboo strip is damaged due to too long liquid-removing time.

[0397] A time range of 5 to 10 minutes can effectively remove excess foaming liquid from the surface of bamboo strips. At the same time, it can improve the quality of bamboo strips by reducing the amount of liquid removed due to insufficient liquid removal time or damaging the bamboo strip structure due to excessive liquid removal time, thereby providing high-quality raw materials for subsequent foaming processes.

[0398] In some embodiments, the length of the bamboo strip is in the range of 5cm to 30cm, and the specific length is not limited here. For example, it can be 5cm, 10cm, 15cm, 20cm, 25cm, 30cm, etc.

[0399] In some embodiments, the width of the bamboo strip is in the range of 1cm to 10cm, and the specific width is not limited here. For example, it can be 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm, etc.

[0400] In some embodiments, the thickness of the bamboo strip is in the range of 0.2cm to 1.5cm, and the specific thickness is not limited here. For example, it can be 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm, 1.1cm, 1.2cm, 1.3cm, 1.4cm, 1.5cm, etc.

[0401] The following describes the preparation method of the foamed bamboo material of this application in detail with different embodiments. The density is measured by gravimetric volume method, the porosity is measured by true density method, the equivalent diameter and equivalent diameter distribution of natural gas pores 11a are tested by optical method, and the resilience is measured by falling ball method, etc., to evaluate the performance of the foamed bamboo material obtained in each embodiment. The equivalent diameter is measured by the average equivalent diameter, the equivalent diameter distribution is measured by the equivalent diameter RSD (Relative Standard Deviation of Equivalent Diameter), and the resilience is measured by the average falling ball rebound rate. The average falling ball rebound rate refers to the average ratio of the height to which a steel ball of a certain specification bounces back to the surface of the tested material under specified test conditions, usually expressed as a percentage.

[0402] Example 1:

[0403] A bamboo strip with a length of 10cm, a width of 2.4cm, and a thickness of 0.2cm was prepared.

[0404] Bamboo strips were placed in a steaming device, and steaming liquid of 4 times the weight of bamboo strips was added (by weight, the ratio of water, sodium sulfite, p-toluenesulfonic acid, and 0.05% anthraquinone was 75:23:2:1), and steamed for 4 hours at 170℃ and 1.2 r / min.

[0405] The cooked bamboo pieces are subjected to freezing treatment, and then immersed in a foaming reagent (water, sodium bicarbonate, 30% hydrogen peroxide, in a mass ratio of 35:50:15 by weight) at 20°C for 48h;

[0406] 40HZ centrifugation for 5min, placed in a hot press mold, foamed at 140°C for 10min to form, and foamed bamboo was obtained.

[0407] Example 2:

[0408] Bamboo pieces with a length of 10cm, a width of 2.4cm, and a thickness of 0.8cm were prepared;

[0409] The bamboo pieces were placed in a cooking device, and a cooking reagent (water, sodium sulfite, p-toluenesulfonic acid, 0.05% anthraquinone, in a ratio of 79:15:6:1 by weight) was added at 5 times the mass of the bamboo pieces, and the cooking was carried out at a temperature of 150°C and a rotation speed of 1.2r / min for 8h;

[0410] The cooked bamboo pieces were subjected to freezing treatment, and then immersed in a foaming reagent (water, sodium bicarbonate, 30% hydrogen peroxide, in a mass ratio of 60:30:10 by weight) at 35°C for 32h;

[0411] 30HZ centrifugation for 7min, placed in a hot press mold, foamed at 170°C for 8min to form, and foamed bamboo was obtained.

[0412] Example 3:

[0413] Bamboo pieces with a length of 10cm, a width of 2.4cm, and a thickness of 1.5cm were prepared;

[0414] The bamboo pieces were placed in a cooking device, and a cooking reagent (water, sodium sulfite, p-toluenesulfonic acid, 0.05% anthraquinone, in a ratio of 82:8:10:1 by weight) was added at 7 times the mass of the bamboo pieces, and the cooking was carried out at a temperature of 130°C and a rotation speed of 1.2r / min for 12h;

[0415] The cooked bamboo pieces were subjected to freezing treatment, and then immersed in a foaming reagent (water, sodium bicarbonate, 30% hydrogen peroxide, in a mass ratio of 80:15:5 by weight) at 50°C for 24h;

[0416] 20HZ centrifugation for 10min, placed in a hot press mold, foamed at 200°C for 5min to form, and foamed bamboo was obtained.

[0417] Example 4:

[0418] Bamboo pieces with a length of 10cm, a width of 2.4cm, and a thickness of 0.2cm were prepared;

[0419] The bamboo pieces are placed in a cooking device, 4 times the mass of the bamboo pieces of cooking liquor (by weight fraction, the fraction ratio of water, 0.05% anthraquinone is 100:1) is added, and the cooking is carried out at a temperature of 170℃ and a rotation speed of 1.2r / min for 4h;

[0420] The cooked bamboo pieces are subjected to freezing treatment, and after completion, are immersed in a foaming liquor (by weight fraction, the fraction ratio of water, sodium bicarbonate, 30% hydrogen peroxide mass is 35:50:15) at 20℃ for 48h;

[0421] 40HZ centrifugation for 5min, placed in a hot press mold, foamed at 140℃ for 10min to form, and the foamed bamboo material is obtained.

[0422] Example 5:

[0423] Bamboo pieces with a length of 10cm, a width of 2.4cm, and a thickness of 0.8cm are prepared;

[0424] The bamboo pieces are placed in a cooking device, 5 times the mass of the bamboo pieces of cooking liquor (by weight fraction, the fraction ratio of water, sodium sulfite, p-toluenesulfonic acid, 0.05% anthraquinone is 79:15:6:1) is added, and the cooking is carried out at a temperature of 150℃ and a rotation speed of 1.2r / min for 8h;

[0425] The cooked bamboo pieces are subjected to freezing treatment, and after completion, are immersed in a foaming liquor (water) at 35℃ for 32h;

[0426] 30HZ centrifugation for 7min, placed in a hot press mold, foamed at 170℃ for 8min to form, and the foamed bamboo material is obtained.

[0427] Example 6:

[0428] Bamboo pieces with a length of 10cm, a width of 2.4cm, and a thickness of 0.8cm are prepared;

[0429] The bamboo pieces are placed in a cooking device, 5 times the mass of the bamboo pieces of cooking liquor (by weight fraction, the fraction ratio of water, sodium sulfite, p-toluenesulfonic acid, 0.05% anthraquinone is 79:15:6:1) is added, and the cooking is carried out at a temperature of 150℃ and a rotation speed of 1.2r / min for 8h;

[0430] The cooked bamboo pieces are subjected to freezing treatment, and after completion, are immersed in a foaming liquor (by weight fraction, the fraction ratio of water, sodium bicarbonate, 30% hydrogen peroxide mass is 60:30:10) at 35℃ for 32h;

[0431] 30HZ centrifugation for 7min, placed in a hot press mold, foamed at 130℃ for 8min to form, and the foamed bamboo material is obtained.

[0432] Example 7:

[0433] A bamboo piece with a length of 10 cm, a width of 2.4 cm, and a thickness of 0.8 cm was prepared;

[0434] The bamboo piece was placed in a cooking device, 5 times the mass of the bamboo piece of cooking liquor (by weight fraction, the fraction ratio of water, sodium sulfite, p-toluenesulfonic acid, 0.05% anthraquinone is 79:15:6:1) was added, and the cooking was carried out at a temperature of 150°C and a rotation speed of 1.2r / min for 8h;

[0435] The cooked bamboo piece was subjected to freezing treatment, and after completion, it was immersed in a foaming liquor (by weight fraction, the fraction ratio of water, sodium bicarbonate, 30% hydrogen peroxide mass is 60:30:10) at 35°C for 32h;

[0436] 30HZ centrifugation for 7min, placed in a hot press mold, foamed at 210°C for 8min to form, and the foamed bamboo was obtained.

[0437] Among them, the rest of the parameters of Example 4 are the same as those of Example 2, except that the cooking liquor is replaced with water of equal mass.

[0438] The rest of the parameters of Example 5 are the same as those of Example 2, except that the foaming liquid is replaced with water of equal mass.

[0439] The rest of the parameters of Example 6 are the same as those of Example 2, except that the hot pressing temperature is 130°C, which is lower than 140°C.

[0440] The rest of the parameters of Example 7 are the same as those of Example 2, except that the hot pressing temperature is 210°C, which is higher than 200°C.

[0441] The following table is obtained by measuring the density by weight volume method, the porosity by true density method, the equivalent diameter and equivalent diameter distribution of natural gas pores 11a by optical method, and the resilience by falling ball method:

[0442] Among them, Example 4 and Example 5 have too small equivalent diameter of natural gas pores 11a, resulting in too small relative standard deviation of equivalent diameter, which cannot be measured. Example 7 cannot be measured in terms of porosity, average equivalent diameter, and relative standard deviation of equivalent diameter because the structure collapses.

[0443] In Example 4, the cooking liquor is replaced with water, so that an effective loose porous structure cannot be formed, and the foaming liquor penetrates poorly, resulting in poor foaming effect.

[0444] In Example 5, the foaming liquor is replaced with water, so that the pore structure cannot be effectively foamed and improved.

[0445] It can be known from the analysis of the embodiments that the specific foaming liquid is combined to perform hot-pressing foaming forming at a temperature range of 140-200 DEG C, to realize the equivalent diameter control of the specific range of natural gas holes 11a, and to obtain the natural skeleton foaming bamboo with large equivalent diameter, good consistency and low density. The purpose of the cooking liquid is to directionally degrade and dissolve lignin and hemicellulose, to form a certain loose porous structure under the condition of maintaining the bamboo skeleton, and to facilitate the penetration of the subsequent foaming liquid. The purpose of the foaming liquid is to quickly form a large amount of gas in the bamboo by temperature control, and to obtain the foaming bamboo with specific equivalent diameter range by hot-pressing forming.

[0446] The hot-pressing temperature is a key control point. In Example 7, the temperature is too high, and the pore structure directly collapses. In Example 6, the temperature is too low, and the foaming effect is poor, which affects the pore structure state of the final product.

[0447] By using the hot-pressing foaming technology, the equivalent diameter control of the specific range of natural gas holes 11a is realized, and the natural skeleton foaming bamboo with large equivalent diameter, good consistency and low density is obtained. The foaming bamboo is derived from natural plants, has the characteristics of high porosity, low density and good resilience, and has broad application prospects in the fields of medical treatment, daily life and heating non-combustion.

[0448] Referring to FIGS. 19-21, the embodiments of the present application provide an aerosol generating article, which comprises an aerosol generating substrate segment 10, the aerosol generating substrate segment 10 comprising the foaming bamboo of any one of the above embodiments, or the aerosol generating substrate segment comprising the foaming bamboo prepared by the preparation method of any one of the above embodiments, and the foaming bamboo at least loading a load capable of generating aerosol.

[0449] Referring to FIGS. 19-21, the embodiments of the present application also provide an aerosol generating article, which comprises a functional segment 20, an outer wrapping layer (not shown in the figure) and the aerosol generating substrate segment 10 of any one of the embodiments of the present application.

[0450] The aerosol generating substrate segment 10 extends along a first direction. Exemplarily, the first direction is the direction indicated by L1 in FIGS. 19-21.

[0451] It should be noted that the aerosol generating article is consistent with the extension direction of the aerosol generating substrate segment 10. That is, the aerosol generating article also extends along the first direction.

[0452] The functional segment 20 is arranged at one end of the aerosol generating substrate segment 10 along the first direction, the functional segment 20 comprising a cooling segment 21 and a filter segment 22, the cooling segment 21 being located between the filter segment 22 and the aerosol generating substrate segment 10. The outer wrapping layer is wrapped around the outer circumferential side of the functional segment 20 and the aerosol generating substrate segment 10.

[0453] The aerosol-generating article is used in cooperation with an aerosol-generating device having a heating assembly, specifically, the heating assembly heats and atomizes the aerosol-generating substrate segment 10 to generate an aerosol, and the user sucks the filtered aerosol through the filter segment 22.

[0454] There are various heating methods for the heating assembly. Exemplarily, the heating methods include center heating and perimeter heating, the center heating method refers to the heating assembly inserted into the inside of the aerosol-generating substrate segment 10 to bake and heat the aerosol-generating substrate segment 10 from the inside to the outside. The perimeter heating method refers to the heating assembly arranged at the periphery of the aerosol-generating article to bake and heat the aerosol-generating substrate segment 10 from the outside to the inside. These heating methods can be electric resistance heating, electromagnetic induction heating, infrared heating, microwave heating, laser heating, air heating, electric field heating, carbon source heating, plasma heating, etc., which are not limited here.

[0455] The cooling segment 21 is arranged between the filter segment 22 and the aerosol-generating substrate segment 10, for cooling the aerosol before filtering by the filter segment 22, to reduce the temperature of the aerosol and improve the "burning mouth" phenomenon when the user inhales the aerosol.

[0456] It should be noted that the aerosol-generating article relies on the aerosol-generating substrate segment 10 to generate aerosol, and the functional segment 20 does not generate aerosol.

[0457] The material of the outer wrapping layer is not limited, for example, including but not limited to one or more combinations of fiber paper, metal foil, infrared radiation layer, metal foil composite fiber paper, polyethylene composite fiber paper, PE, PBAT, etc.

[0458] The outer wrapping layer can be a hollow tubular shape, and the aerosol-generating substrate segment 10 and the functional segment 20 can be arranged in the hollow tubular outer wrapping layer in sequence. The outer wrapping layer can also be tipping paper, and the aerosol-generating substrate segment 10 and the functional segment 20 are compounded into an integrated structure by the tipping paper.

[0459] The first direction is the arrangement direction of the aerosol-generating substrate segment 10, the cooling segment 21 and the filter segment 22. The aerosol-generating article is inserted into the aerosol-generating device along the first direction, and the aerosol-generating article is also taken out of the aerosol-generating device along the first direction. The length of the aerosol-generating substrate segment 10 in the first direction can be longer, shorter or the same as the length in other directions.

[0460] For example, when the appearance profile of the aerosol-generating substrate segment 10 is cylindrical, the first direction is the axial direction of the aerosol-generating substrate segment 10. It should be noted that the axial length of the aerosol-generating substrate segment 10 can be smaller than its diameter.

[0461] For another example, when the appearance profile of the aerosol generating substrate segment 10 is a cuboid, the first direction is still the direction defined above, i.e., the arrangement direction of the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22, or the direction in which the aerosol generating article is taken off and put on the aerosol generating device, or the first direction of the aerosol generating substrate segment 10 can be any one of the length, width and height of the cuboid.

[0462] For example, please continue to refer to FIGS. 19-21, the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22 can be coaxially arranged cylindrical bodies, and the first direction is the axial direction of the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22.

[0463] For example, the length dimension of the aerosol generating substrate segment 10 along the first direction can be 20%-80% (including the end point value) of the length dimension of the aerosol generating article along the first direction, such as 20%, 40%, 50%, 80% and the like.

[0464] For example, the length dimension of the temperature reduction segment 21 along the first direction can be 25%-65% (including the end point value) of the length dimension of the aerosol generating article along the first direction, such as 25%, 30%, 50%, 65% and the like.

[0465] It can be understood that, during the user's puffing, the aerosol generated by the aerosol generating substrate segment 10 flows to the filter segment 22 along the first direction.

[0466] In an embodiment, please refer to FIGS. 19-21, the temperature reduction segment 21 has an airflow passage 21a. The aerosol generating substrate segment 10 enters the airflow passage 21a and is cooled in the airflow passage 21a.

[0467] In other embodiments, the temperature reduction segment 21 can also adopt other structural forms as long as it can play a temperature reduction role.

[0468] In an embodiment, please refer to FIGS. 20 and 21, the filter segment 22 has a puffing passage 22a to play a role of adjusting the resistance.

[0469] In an embodiment, please refer to FIGS. 19-21, the functional segment 20 further includes a flavoring segment 23, which is arranged between the temperature reduction segment 21 and the filter segment 22 to play a role of smoke flavor compensation and improving the puffing taste.

[0470] The structural form of the flavoring segment 23 is not limited, for example, the flavoring segment 23 can be provided with fiber cotton 231 subjected to flavoring treatment, or the flavoring segment 23 can be provided with fiber cotton 231 and a burst bead 232, the fiber cotton 231 can be fiber cotton 231 subjected to flavoring treatment or fiber cotton 231 not subjected to flavoring treatment, and the burst bead 232 is arranged in the fiber cotton 231.

[0471] In some other embodiments, the functional segment 20 can also not be provided with the flavoring segment 23.

[0472] In some embodiments, the aerosol generating article can not have the functional segment 20, i.e., the aerosol generating substrate segment 10 alone can constitute the aerosol generating article, for use in some special aerosol generating devices, e.g., the aerosol generating device includes a mouthpiece and a cooling component, which can be reusable or disposable, and only the aerosol generating substrate segment 10 is inserted into or removed from the heating space. The substrate unit 11 can be the substrate unit 11 and the assembly structure in all the above embodiments, which will not be repeated here.

[0473] In the above embodiments, the aerosol generating substrate segment 10 can be cylindrical, sheet-shaped, square-shaped, etc., and can be adapted according to the characteristics of the heating assembly and the aerosol generating device.

[0474] In an embodiment, referring to FIG. 21, the aerosol generating article further includes a front plug segment 30, which is disposed at one end of the aerosol generating substrate segment 10 away from the functional segment 20 in the first direction.

[0475] During use of the aerosol generating article, the front plug segment 30 can effectively reduce the probability of the aerosol generating substrate segment 10 falling out of the outer wrapper.

[0476] The two ends of the aerosol generating article in the first direction are the distal lip end and the proximal lip end. The proximal lip end refers to the end of the aerosol generating article close to the user during use of the aerosol generating article, and the distal lip end refers to the end of the aerosol generating article away from the user during use of the aerosol generating article. The front plug segment 30 is equivalent to being located at the distal lip end of the aerosol generating article, so that the problem of the condensed aerosol flowing downward and remaining in the accommodation chamber of the aerosol generating device, causing internal contamination of the accommodation chamber and being difficult to clean, and the problem of flavoring of different aerosol generating articles being mixed are effectively avoided.

[0477] During extraction of the aerosol generating article from the accommodation chamber of the aerosol generating device, even if adhesion occurs between the heating assembly and the aerosol generating substrate segment 10, the front plug segment 30 can push the aerosol generating substrate segment 10 to move away from the accommodation chamber, so as to facilitate separation of the heating assembly and the aerosol generating substrate segment 10 and facilitate extraction of the aerosol generating article from the accommodation chamber of the aerosol generating device.

[0478] In an embodiment, referring to FIG. 21, the front plug segment 30 is a hollow tube structure. That is, the front plug segment 30 has an internal passage that extends through the front plug segment 30 away from the end of the aerosol generating substrate segment 10 and close to the end of the aerosol generating substrate segment 10, through which the heating assembly can be inserted into the aerosol generating substrate segment 10. By providing the front plug segment 30 as a hollow tube structure, the resistance experienced by the aerosol generating article during insertion into the receiving chamber of the aerosol generating device is relatively low, facilitating user operation.

[0479] In an embodiment, the front plug segment 30 is made of a gas-permeable material. Thus, the airflow can pass through the front plug segment 30 relatively smoothly, thereby facilitating reduction of the draw resistance of the aerosol generating article and improvement of the user's smoking experience.

[0480] In an embodiment, the temperature reduction segment 21 is made of bamboo. For example, it can be a natural main material. Since bamboo (e.g., a natural main material) has a naturally porous property, the temperature reduction effect is relatively good. At the same time, the raw material source of bamboo (e.g., a natural main material) is relatively extensive, and the acquisition cost is relatively low, thereby facilitating control of the cost of the aerosol generating article. In addition, the temperature resistance of bamboo (e.g., a natural main material) is relatively good, and it basically does not produce an odor, thereby facilitating improvement of the taste of the aerosol.

[0481] In an embodiment, the filter segment 22 is made of bamboo (e.g., a natural main material). Since the raw material source of bamboo (e.g., a natural main material) is relatively extensive, and the acquisition cost is relatively low, thereby facilitating control of the cost of the aerosol generating article. In addition, the temperature resistance of bamboo (e.g., a natural main material) is relatively good, and it basically does not produce an odor, thereby facilitating improvement of the taste of the aerosol.

[0482] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some or all of the technical features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in the embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An aerosol generating substrate segment comprising substrate units, each of the substrate units comprising a medium carrier and a load, the medium carrier being configured to load the load, the load comprising at least an aerosol generating agent, the medium carrier being made of a pre-treated natural bamboo material, the natural bamboo material having a plurality of natural pores inside.

2. The rod of aerosol-generating substrate according to claim 1, wherein, a ratio of a weight of the load to a weight of the medium carrier is 0.1 to 30; and / or, The density of the matrix unit is 50 mg / cm 3 ~ 1000 mg / cm 3 .

3. The rod of aerosol-generating substrate according to claim 1, wherein, a pore size of the natural pores is 0.1 μm to 2 cm; and / or, a porosity of the substrate units is 35% to 98%; and / or, a thermal conductivity of the substrate units is 0.03 W / m.k to 0.3 W / m.k.

4. The rod of aerosol-generating substrate according to claim 1, wherein, the load further comprises at least one of a plant component, an adhesive component, a flavor component, and a nicotine component.

5. The aerosol generating substrate segment according to any one of claims 1-4, wherein, a number of the substrate units is plural, and the aerosol generating substrate segment further comprises a wrapping layer, the wrapping layer being wound to form an accommodation space, and all of the substrate units are accommodated in the accommodation space.

6. The rod of aerosol-generating substrate according to claim 5, wherein, a filling rate of the aerosol generating substrate segment is 40% to 100%.

7. The rod of aerosol-generating substrate according to claim 5, wherein, at least some of the substrate units are arranged in parallel along a first direction to form a bundle; and / or, at least some of the substrate units are stacked along the first direction. 8.An aerosol generating substrate segment comprising substrate units, each of the substrate units comprising a medium carrier and a load, the medium carrier being configured to load the load, the load comprising at least an aerosol generating agent, the medium carrier being configured to be made of a plant material comprising a plurality of natural pores arranged in parallel, the aerosol generating substrate segment having a plurality of airflow passages extending along a first direction inside, the natural pores forming the airflow passages.

9. An aerosol-generating substrate segment according to claim 8, wherein, the medium carrier is a bamboo material comprising the natural pores, the natural pores extending along a length direction of the aerosol generating substrate segment.

10. The rod of aerosol-generating substrate according to claim 8, wherein, the medium carrier comprises at least one of a bamboo material, a wood material, a kudzu vine, a wisteria vine, a clematis vine, a grape vine, a milk vetch root, a codonopsis root, a rush stem, a water onion stem, a sugar cane, a corn, a sorghum, and a reed.

11. The rod of aerosol-generating substrate according to claim 8, wherein, the load further comprises at least one of an essence, a flavor, a nicotine, a herbal powder, a herbal extract, a herbal extract, a tobacco powder, a tobacco extract, and a tobacco extract.

12. The rod of aerosol-generating substrate according to claim 8, wherein, the load further comprises a herbal extract, the herbal extract comprising at least one of a mint extract, a liquorice extract, a chrysanthemum extract, a momordica grosvenori extract, a ginger extract, a chamomile extract, a tea extract, a lavender extract, a cocoa extract, a loquat leaf extract, and a cinnamon extract; and / or, the load comprises a tobacco extract, the tobacco extract comprising at least one of a tobacco water extract, a tobacco alcohol extract, a tobacco supercritical CO2 extract, and a tobacco enzymatic extract.

13. The rod of aerosol-generating substrate according to claim 8, wherein, a porosity of the medium carrier is in a range of 50% to 98%; and / or, The density of the medium support is in the range of 0.05 g / cm 3 to 0.3 g / cm 3 .

14. The rod of aerosol-generating substrate according to claim 8, wherein, a porosity of the medium carrier is in a range of 80% to 95%; and / or, The density of the medium support is in the range of 0.1 g / cm 3 to 0.24 g / cm 3 of 0.1 g / cm3to 0.24 g / cm3.

15. The rod of aerosol-generating substrate according to claim 8, wherein, an average equivalent diameter of all of the airflow passages having an equivalent diameter greater than or equal to 10 μm is in a range of 0.05 mm to 0.8 mm.

16. The rod of aerosol-generating substrate according to claim 8, wherein, a diameter of the aerosol generating substrate segment is in a range of 4 mm to 15 mm; and / or, a length dimension of the aerosol generating substrate segment is in a range of 5 mm to 60 mm.

17. The rod of aerosol-generating substrate according to claim 8, wherein, more than 90% of the airflow passage has an equivalent diameter in a range of 1 µm to 2 mm.

18. The rod of aerosol-generating substrate according to claim 8, wherein, on a cross section of the aerosol generating substrate segment, an average equivalent diameter of all the airflow passages having an equivalent diameter greater than or equal to 0.01 mm is in a range of 0.05 mm to 0.5 mm; and / or, on an axial cross section of the aerosol generating substrate segment, an average equivalent diameter of all the airflow passages having an equivalent diameter greater than or equal to 0.01 mm is in a range of 0.01 mm to 0.05 mm.

19. The rod of aerosol-generating substrate according to claim 8, wherein, The density of the matrix unit is in the range of 0.4 g / cm 3 to 1.2 g / cm 3 and / or, a porosity of the substrate unit is in a range of 20% to 90%.

20. The rod of aerosol-generating substrate according to claim 8, wherein, a thermal conductivity of the aerosol generating substrate segment is in a range of 0.1 W / m.k to 0.3 W / m.k; and / or, a specific heat capacity of the aerosol generating substrate segment is in a range of 1.0 kJ / (kg·K) to 3.8 kJ / (kg·K).

21. The rod of aerosol-generating substrate according to claim 8, wherein, an elastic recovery of the substrate unit is in a range of 76% to 98%; and / or, a hardness of the substrate unit is in a range of 70% to 95%.

22. The rod of aerosol-generating substrate according to claim 8, wherein, a tensile strength of the substrate unit in the first direction is in a range of 1 kN / m to 8 kN / m; and / or, a tensile strength of the substrate unit in a direction perpendicular to the first direction is in a range of 0.05 kN / m to 3 kN / m.

23. The aerosol generating substrate segment of any one of claims 8-22, wherein, the medium carrier has a columnar structure, and the aerosol generating substrate segment is formed of a single medium carrier.

24. An aerosol-generating substrate segment according to claim 23, wherein, on a cross section perpendicular to the first direction, a ratio of a sum of cross-sectional areas of all the airflow passages having an equivalent diameter in a range of 0.01 mm to 0.3 mm to a cross-sectional area of the medium carrier is in a range of 10% to 60%.

25. The aerosol generating substrate segment of any one of claims 8-22, wherein, the medium carrier has a columnar structure, and the aerosol generating substrate segment is formed of a plurality of medium carriers gathered together.

26. An aerosol-generating substrate segment according to claim 25, wherein, a number of the medium carriers is in a range of 2 to 30; and / or, a shape of a cross section of the medium carrier includes at least one of a circle, a semi-circle, an ellipse, a regular polygon, an irregular polygon, and a sector.

27. The rod of aerosol-generating substrate according to claim 25, wherein, a diameter of each of the medium carriers is in a range of 0.05 mm to 5 mm.

28. The aerosol generating substrate segment of any one of claims 8-22, wherein, the medium carrier has a sheet structure, and the aerosol generating substrate segment is formed of at least one medium carrier wound or folded.

29. An aerosol-generating substrate segment according to claim 28, wherein, a thickness of the medium carrier is in a range of 0.5 mm to 3 mm.

30. An aerosol-generating substrate segment according to claim 28, wherein, in the first direction, a dimension of the medium carrier is in a range of 10 mm to 150 mm; and / or, in a second direction, a dimension of the medium carrier is in a range of 24 mm to 354 mm, wherein the second direction is orthogonal to both the first direction and a thickness direction of the medium carrier.

31. The aerosol generating substrate segment of any one of claims 8-22, wherein, the aerosol generating substrate segment includes at least two substrate units including a first substrate unit and a second substrate unit, the first substrate unit is formed of the medium carrier having a columnar structure, and the second substrate unit is formed of at least one medium carrier having a sheet structure wound or folded.

32. The aerosol generating substrate segment of any one of claims 8-22, wherein, the equivalent diameter of the airflow passage gradually increases from the distal lip end of the aerosol generating substrate segment to the proximal lip end of the aerosol generating substrate segment; and / or, the equivalent diameter of each of the airflow passages gradually increases or decreases along the radial direction of the aerosol generating substrate segment from the inside to the outside on the same cross section of the aerosol generating substrate segment.

33. The aerosol generating substrate segment of any one of claims 8-22, wherein, the aerosol generating substrate segment has a high load area and a low load area on the cross section of the aerosol generating substrate segment, and the low load area is arranged around the periphery of the high load area; and / or, a loose area is arranged at the axis of the aerosol generating substrate segment.

34. The aerosol generating substrate segment of any one of claims 8-22, wherein, the aerosol generating substrate segment is provided with a heating hole for inserting a heating assembly.

35. An aerosol-generating substrate segment according to claim 34, wherein, the cross section of the heating hole is circular or "cross" shaped.

36. A foamed bamboo material, said foamed bamboo material being formed from natural bamboo, said foamed bamboo material having a plurality of natural gas pores extending along a first direction, said natural gas pores having an equivalent diameter greater than or equal to 10 μm, the average equivalent diameter of all said natural gas pores being in the range of 0.05 mm to 0.8 mm, and said foamed bamboo material having a density of 0.05 g / cm³. 3 Up to 0.3 g / cm 3 Within the specified range, the porosity of the foamed bamboo material is greater than or equal to 50%.

37. A method for preparing a foamed bamboo material, comprising: preparing bamboo pieces; placing the bamboo pieces in a cooking solution for cooking; freezing the cooked bamboo pieces; immersing the frozen bamboo pieces in a foaming solution; foaming the immersed bamboo pieces to obtain a foamed bamboo material.

38. An aerosol generating article, comprising: an aerosol generating substrate segment comprising the foamed bamboo material of claim 36 or the foamed bamboo material prepared by the method of claim 37, the foamed bamboo material at least loaded with a load capable of generating aerosol.

39. An aerosol generating article, comprising: the aerosol generating substrate segment of any one of claims 1-35, the aerosol generating substrate segment extending in a first direction; a functional segment arranged at one end of the aerosol generating substrate segment in the first direction, the functional segment comprising a temperature reducing segment and a filter segment, the temperature reducing segment being located between the filter segment and the aerosol generating substrate segment; an outer wrapping layer wrapped around the functional segment and the outer peripheral side of the aerosol generating substrate segment.

40. An aerosol-generating article according to claim 39, wherein, the aerosol generating article further comprises a front plug segment arranged at one end of the aerosol generating substrate segment away from the functional segment in the first direction, the front plug segment is a hollow tube structure; and / or the front plug segment is made of a breathable material.

41. An aerosol-generating article according to claim 39, wherein, the temperature reducing segment and / or the filter segment are made of bamboo material.

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