Aerosol-generating substrate segment and aerosol-generating product

Abstract

An aerosol-generating substrate segment and an aerosol-generating product. The aerosol-generating substrate segment comprises a plurality of substrate rods arranged in parallel to form a bundle, wherein adjacent substrate rods are at least partially in contact, the substrate rods extend from one end of the aerosol-generating substrate segment to the other end thereof, and the average surface roughness of the substrate rods ranges from 2 μm to 50 μm. The aerosol-generating substrate segment helps to enhance the vaping experience and reduce the likelihood of substrate rod breakage or detachment after use.

Description

An aerosol generating substrate segment and an aerosol generating article

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202410906148.5, filed on July 5, 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 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. By loading a smoking agent, the smoking agent is released to form an aerosol by heating the aerosol generating substrate segment during use.

[0005] In related technologies, the forms of the aerosol generating substrate segment mainly include thin sheets, filaments, loose particles, and porous columns filled integrally. Due to the structure of the aerosol generating substrate segment, it is difficult to ensure that the release amount of the aerosol remains consistent during the pre-middle-late stages of smoking. When smoking the smoking article, the amount of smoke varies greatly from one puff to another, and the smoking experience is poor. SUMMARY

[0006] In view of this, the embodiments of the present application aim to provide an aerosol generating substrate segment and an aerosol generating article to improve the smoking experience.

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

[0008] In a first aspect, the embodiments of the present application provide an aerosol generating substrate segment, which includes a plurality of substrate strips arranged in parallel into a bundle, adjacent substrate strips at least partially contact each other, each substrate strip extends from one end to the other end of the aerosol generating substrate segment, and the average roughness of the surface of the substrate strip is 2 μm to 50 μm.

[0009] In an embodiment, the thermal conductivity of the substrate strip is 0.3 W / m·K to 1.2 W / m·K.

[0010] In an embodiment, the thermal conductivity of the substrate strip is 0.4 W / m·K to 0.8 W / m·K.

[0011] In one embodiment, the matrix strip has a moisture content of 5% to 20%.

[0012] In one embodiment, the matrix strip has a density of 400 mg / cm 3 to 2000 mg / cm 3 .

[0013] In one embodiment, the matrix strip has a density of 800 mg / cm 3 to 1300 mg / cm 3 .

[0014] In one embodiment, the matrix strip has a length of 6 mm to 40 mm.

[0015] In one embodiment, the matrix strip has a cross-sectional dimension of 0.4 mm to 7 mm.

[0016] In one embodiment, the cross-sectional shape of the matrix strip is one of a polygon, an ellipse, a petal, a circle, a kidney, a gear, and a special shape.

[0017] In one embodiment, the matrix strip has a uniform cross-sectional structure.

[0018] In one embodiment, the density of each of the matrix strips is the same.

[0019] In one embodiment, the cross-sectional shape and dimension of each of the matrix strips are the same.

[0020] In one embodiment, the density of at least one of the matrix strips is different from the other matrix strips.

[0021] In one embodiment, the cross-sectional dimension of at least one of the matrix strips is different from the other matrix strips.

[0022] In one embodiment, a plurality of the matrix strips arranged in parallel extend in a first direction, and an angle between the first direction and a central axis direction of the aerosol generating substrate section is not greater than 10 degrees.

[0023] In one embodiment, the aerosol generating substrate section further includes a wrapping layer, and the wrapping layer is wound to form an accommodation space in which all the matrix strips are accommodated.

[0024] In one embodiment, the aerosol generating substrate section has a filling rate of 40% to 90%.

[0025] In one embodiment, the aerosol generating substrate section includes a susceptor, and each of the matrix strips is disposed on an outer circumferential side of the susceptor.

[0026] In an embodiment, the aerosol generating substrate segment is provided with a heating hole along an axial extension thereof, the heating hole being configured to accommodate a heating element of an aerosol generating device, the heating hole having a size greater than a size of the heating element.

[0027] In a second aspect, an embodiment of the present application provides an aerosol generating article, comprising:

[0028] The aerosol generating substrate segment according to any one of the preceding embodiments, wherein the substrate strip extends in a first direction;

[0029] a functional segment, the functional segment being arranged at one end of the aerosol generating substrate segment in the first direction, the functional segment comprising a temperature reduction segment and a filter segment, the temperature reduction segment being located between the filter segment and the aerosol generating substrate segment;

[0030] an outer wrapping layer, the outer wrapping layer wrapping an outer circumferential side of the functional segment and the aerosol generating substrate segment.

[0031] In an embodiment, the temperature reduction segment has an airflow passage, and the aerosol generating article further comprises a gas permeable film;

[0032] the gas permeable film is arranged on the temperature reduction segment, and the airflow passage is covered by the gas permeable film at least near one end of the aerosol generating substrate segment; or

[0033] the gas permeable film is arranged on the aerosol generating substrate segment, and the aerosol generating substrate segment is covered by the gas permeable film at least near one end of the airflow passage.

[0034] In a third aspect, an embodiment of the present application provides an aerosol generating article, comprising:

[0035] the aerosol generating substrate segment according to any one of the preceding embodiments;

[0036] a gas permeable film, the gas permeable film being arranged at least one end of the aerosol generating substrate segment.

[0037] The average roughness of the surface of the substrate strip is controlled in the range of 2-50 μm, which is appropriate. On the one hand, the contact area between adjacent substrate strips can be increased, and the thermal conductivity between the substrate strips is also improved, which is beneficial to the rapid smoking of the aerosol generating substrate segment and the smoking amount during smoking, and the smoking amount of the aerosol generating substrate segment is more uniform during the use life, thereby improving the smoking experience. On the other hand, the friction between adjacent substrate strips can also be appropriately increased, thereby reducing the probability of the substrate strip after use breaking and falling into the heating cavity of the aerosol generating device, or in other words, reducing the probability of the substrate strip falling in the assembled aerosol generating substrate segment.

[0038] In addition, the average roughness of the surface of the substrate strip is related to the extrusion force of the extruder. Controlling the average roughness of the surface of the substrate strip in the range of 2-50 μm is beneficial to improving the toughness of the substrate strip under the premise of relatively controllable process, and the substrate strip is not easy to crack or break. BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 is a structural diagram of a first aerosol generating substrate segment according to an embodiment of the present application;

[0040] FIG. 2 is a structural diagram of a substrate strip according to an embodiment of the present application;

[0041] FIG. 3 is a cross-sectional view of the aerosol generating substrate segment shown in FIG. 1;

[0042] FIG. 4 is a cross-sectional view of the first aerosol generating substrate segment according to an embodiment of the present application;

[0043] FIG. 5 is a cross-sectional view of a second aerosol generating substrate segment according to an embodiment of the present application;

[0044] FIG. 6 is a cross-sectional view of a third aerosol generating substrate segment according to an embodiment of the present application;

[0045] FIG. 7 is a cross-sectional view of a fourth aerosol generating substrate segment according to an embodiment of the present application;

[0046] FIG. 8 is a cross-sectional view of a fifth aerosol generating substrate segment according to an embodiment of the present application;

[0047] FIG. 9 is a cross-sectional view of a sixth aerosol generating substrate segment according to an embodiment of the present application;

[0048] FIG. 10 is a cross-sectional view of a seventh aerosol generating substrate segment according to an embodiment of the present application;

[0049] FIG. 11 is a structural diagram of a first aerosol generating article according to an embodiment of the present application;

[0050] FIG. 12 is a schematic view of a structure of a second aerosol generating article according to an embodiment of the present application;

[0051] FIG. 13 is a schematic view of a structure of a third aerosol generating article according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. The following embodiments are only used to make the technical solutions of the present application clearer, 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 fall within the protection scope of the present application.

[0053] 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.

[0054] In this document, reference to “an 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 application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a particular alternative embodiment. It will be explicitly understood by a person of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term “and / or” is only a description of 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 “ / ” herein generally represents an “or” relationship between the front and rear associated objects.

[0056] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms “mounting”, “connection”, “connecting”, “fixing” and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; 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.

[0057] 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.

[0058] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] Referring to FIGS. 1, 3-10, the present application provides an aerosol generating substrate segment 10, which includes a plurality of substrate strips 11 arranged in parallel into a bundle, adjacent substrate strips 11 at least partially contact each other, and the substrate strips 11 extend from one end to the other end of the aerosol generating substrate segment 10.

[0060] Specifically, each substrate strip 11 extends along a first direction. The first direction is the direction indicated by L1 in FIG. 3.

[0061] The extension direction of the substrate strip 11 can be defined as the first direction, and the parallel arrangement means that the projection of each substrate strip 11 on a projection plane parallel to the first direction at least partially overlaps. That is, each substrate strip 11 is not sequentially connected end to end along the first direction, but is substantially side by side. That is, each substrate strip 11 is in a substantially parallel state and 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 such as a cuboid, the central axis is the axis of symmetry. If the aerosol generating substrate segment 10 is asymmetric, the central axis corresponds to the direction of the airflow during smoking.

[0062] When the substrate strips 11 are arranged into a bundle, the substrate strips 11 contact the immediately adjacent other substrate strips 11 around them. This can be full contact along the axial direction of the substrate strip 11 and part of the surface of the substrate strip 11, or partial contact due to the unevenness of the surface of the substrate strip 11, or partial length contact due to a specific design.

[0063] The substrate strip 11 is used to generate an aerosol when heated for a user to smoke.

[0064] It should be noted that the aerosol generating substrate segment 10 of the present application can be suitable for smoking by ignition, or can be suitable for smoking by heating without combustion. In the present application, the aerosol generating substrate segment 10 is described as being suitable for smoking by heating without combustion.

[0065] The heating assembly of the aerosol-generating device heats the aerosol-generating substrate segment 10, and the aerosol-generating substrate segment 10 releases aerosol when heated. The user puffs on the aerosol intermittently, that is, the user puffs on the aerosol, stops puffing, puffs on the next puff of aerosol, and so on. The front section of the puff refers to the period when the aerosol-generating substrate segment 10 is initially used, and the first few puffs correspond to the front section of the puff, for example, 1-5 puffs. The rear section of the puff refers to the period when the aerosol-generating substrate segment 10 is close to complete release of the aerosol, and the last few puffs correspond to the rear section of the puff, for example, the last 1-5 puffs. The front section and the rear section of the puff refer to the early and late stages of the use life of the aerosol-generating substrate segment 10, respectively. The middle section of the puff refers to the period between the front section and the rear section.

[0066] The specific structure of the substrate strip 11 is not limited here. Exemplarily, the substrate strip 11 can be made of the atomization medium itself, for example, made of a smoking flavor medium. In other embodiments, the substrate strip 11 can also include a substrate and an atomization medium arranged on the substrate. The substrate can be one or more of carbon fibers, needle leaf pulp fibers, broadleaf wood pulp fibers, bamboo fibers, cotton fibers, and hemp fibers, for example. In this way, by arranging the substrate, the strength of the substrate strip 11 can be improved, and a certain degree of high temperature can be withstood without producing an odor.

[0067] The specific composition of the substrate strip 11 is not limited here. Exemplarily, the substrate strip 11 can include plant components, auxiliary components, smoking agent components, adhesive components, and the like.

[0068] In an embodiment, the plant component is one or a combination of powders formed after crushing processing of tobacco raw materials, tobacco fragments, tobacco stems, tobacco fines, and flavor plants. The plant component is the core source of product flavor. 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 a physiological satisfaction feeling.

[0069] In an embodiment, the plant component can include one or more of tobacco, tea leaves, tea stems, dandelion, eucalyptus, clove, cassia bark, turmeric, fungi, insulin wood, radix astragali, Chinese date kernel, horse bean, radix puerariae, fennel, rosemary, star anise, honeysuckle, chrysanthemum, rose, marigold, mugwort leaf, olive, ginseng, American ginseng, green beans, red beans, dried tangerine or orange peel, nut shells, lily, coffee, agarwood, mint, hawthorn, licorice, cocoa, agaric, lotus seed, lotus leaf, cold 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).

[0070] In one embodiment, the adjuvant ingredient can be one or more of a combination of inorganic filler, lubricant, emulsifier. The inorganic filler can include one or more of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talcum powder, diatomite. The inorganic filler can provide skeleton support to the plant ingredient, and at the same time, the inorganic filler has micropores, which can increase the porosity of the wall material after the plant ingredient is formed, thereby increasing the aerosol release rate.

[0071] The lubricant can include one or more of a combination of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, palmitic acid. The lubricant can increase the flowability of the particles, reduce the friction between the particles, make the overall density of the particle distribution more uniform, and also reduce the pressure required for mold forming and reduce the wear of the mold.

[0072] The emulsifier can include one or more of a combination of polyglycerol fatty acid ester, Tween-80, polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to some extent, increase the stability of flavor substances, and improve the sensory quality of the product. The emulsifier (also known as a surfactant) can reduce the interfacial tension between water-soluble and water-insoluble components in the mixed system, and form a relatively strong film on the surface of the droplets or a double electric layer on the surface of the droplets due to the charge given by the emulsifier, preventing the droplets from aggregating with each other and maintaining a uniform emulsion. The homogenization of two immiscible components can improve the consistency of product quality.

[0073] The function of the smoking agent ingredient is to generate a large amount of steam when heated, thereby increasing the amount of smoke of the smoking product. In one embodiment, the smoking agent can include one or more of a combination of monohydric alcohol (such as menthol), polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol), ester of polyhydric alcohol (such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate), monocarboxylic acid, polycarboxylic acid (such as lauric acid, myristic acid), or aliphatic ester of polycarboxylic acid (such as 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).

[0074] In an embodiment, the adhesive component is a natural plant extract, a non-ionic modified viscous polysaccharide, including one or more of a combination of jambu polysaccharide, pullulan, fucoidan, locust bean gum, guar gum, xyloglucan. The adhesive is in close contact by wetting the interface with the component material of the product, generating intermolecular attraction, thereby playing a role in bonding the powders, liquids, etc. of the component material. At the same time, the use of natural plant extracts, non-ionic adhesives can avoid the release of harmful substances such as methanol, formaldehyde, propylene aldehyde, etc. caused by colloid modification, and improve the safety of the product.

[0075] The substrate strip 11 can be a granular combination, which is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing components such as smoke generating agents and tobacco. The substrate strip 11 is a one-piece structure, which can be formed by injection molding, compression molding or extrusion process. Among them, extrusion molding refers to a processing method in which the raw material mixture is added to the extruder, and the material is continuously pushed forward by the screw or piston through the head to form various cross-section products or semi-products.

[0076] Exemplarily, a plurality of substrate strips 11 can be extruded simultaneously by an extruder, and the substrate strips 11 are dried and shaped by a drying device. The shaped substrate strips 11 can also be arranged in a desired direction as needed, and then formed into an aerosol generating substrate segment 10 by a winding rod.

[0077] Since the substrate strip 11 is an extruded combination, the aerosol generating substrate segment 10 formed by the plurality of substrate strips 11 is a one-piece medium when heated for smoking or stopped heating, and is not prone to disintegration and falling. The problems such as flake loosening, filament component and particle component falling off, and difficulty in cleaning of the aerosol generating substrate segment 10 in the form of flake, filament or scattered particles in the prior art are solved.

[0078] The average roughness of the surface of the substrate strip 11 is 2 μm to 50 μm. For example, it can be 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm, 23 μm, 26 μm, 29 μm, 32 μm, 36 μm, 40 μm, 45 μm, 50 μm.

[0079] It should be noted that the roughness of each part of the surface of a single substrate strip 11 can be different, as long as the average roughness of the surface of a single substrate strip 11 is controlled between 2 μm and 50 μm.

[0080] In some embodiments, the average roughness of the surface of each substrate strip 11 can be different. For example, the average roughness of the surface of each substrate strip 11 can gradually increase or decrease along the radial direction of the aerosol generating substrate section 10 from inside to outside, and can be designed according to the heating mode of central heating or circumferential heating, or can be designed according to different heating modes such as resistance heating, infrared heating, microwave heating, electromagnetic heating, etc.

[0081] The difference in the average roughness of the surface of each substrate strip 11 can be controlled and adjusted by controlling the extrusion force, the roughness of the inner wall of the extrusion die, the moisture content of the substrate strip 11, and the composition of the substrate strip 11.

[0082] In other embodiments, the average roughness of the surface of each substrate strip 11 can also be the same.

[0083] It can be understood that if the average roughness of the surface of the substrate strip 11 is too small, the contact area between the substrate strips 11 is relatively small, and the thermal conductivity between the substrate strips 11 is relatively low. If the average roughness of the surface of the substrate strip 11 is too large, a large gap can be formed between the substrate strips 11, which can reduce the contact area between the substrate strips 11 and reduce the thermal conductivity between the substrate strips 11.

[0084] The aerosol generating substrate section of the embodiments of the present application controls the average roughness of the surface of the substrate strip 11 to be in the range of 2 μm to 50 μm. The average roughness of the surface of the substrate strip 11 is appropriate, which can increase the contact area between the substrate strips 11 and improve the thermal conductivity between the substrate strips 11. During smoking, it is beneficial to quickly smoke the aerosol generating substrate section 10, increase the amount of smoke in the pre-smoking stage, and make the amount of smoke of the aerosol generating substrate section 10 more uniform during the use life, thereby improving the smoking experience. On the other hand, the friction between the substrate strips 11 can also be appropriately increased, thereby reducing the probability of the substrate strips 11 breaking and falling into the heating chamber of the aerosol generating device after use, or reducing the probability of the substrate strips 11 falling in the assembled aerosol generating substrate section 10.

[0085] In addition, the average roughness of the surface of the substrate strip 11 is related to the extrusion force of the extruder. Controlling the average roughness of the surface of the substrate strip 11 to be in the range of 2 μm to 50 μm is also beneficial to the extrusion of the extruder to form the substrate strip 11, which can improve the toughness of the substrate strip and reduce the risk of cracking and breaking. It is also beneficial to improve the production efficiency of the aerosol generating substrate section 10.

[0086] It should be noted that the "smoke amount" mentioned above refers to the amount of smoke.

[0087] In an embodiment, the thermal conductivity of the substrate strips 11 is 0.3 W / m·K to 1.2 W / m·K. For example, 0.3 W / m·K, 0.4 W / m·K, 0.5 W / m·K, 0.6 W / m·K, 0.7 W / m·K, 0.8 W / m·K, 0.9 W / m·K, 1.0 W / m·K, 1.1 W / m·K, 1.2 W / m·K, and the like.

[0088] The thermal conductivity reflects the heat conduction capacity of the substrate strips 11. 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 strips 11, so that the substrate strips 11 can generate aerosol more quickly and sufficiently under the same heating condition.

[0089] For example, the thermal conductivity of the substrate strips 11 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 section 10, and for a perimeter heating type aerosol generating device, the heating assembly is arranged around the outer periphery of the aerosol generating substrate section 10. Therefore, the thermal conductivity of each substrate strip 11 can gradually increase or decrease from the inside to the outside along the radial direction of the aerosol generating substrate section 10.

[0090] In the related art, the thermal conductivity of the sheet type aerosol generating substrate section is 0.19 W / m·K. In the present application, the thermal conductivity of the substrate strips 11 is controlled to be within the range of 0.3 W / m·K to 1.2 W / m·K. On the one hand, the thermal conductivity of the substrate strips 11 is not too small, so that the heat provided by the heating source can be fully transferred between the substrate strips 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 strips 11 is positively correlated with the density of the substrate strips 11. When the density of the substrate strips 11 is too large, the pores in the substrate strips 11 are blocked, so that the aerosol generated by the substrate strips 11 cannot be fully released. In the present embodiment, the thermal conductivity of the substrate strips 11 is not greater than 1.2 W / m·K. Therefore, the density of the substrate strips 11 can be controlled within an appropriate range, so that the aerosol generated by the substrate strips 11 can be fully released, and it is also beneficial to control the draw resistance of the aerosol.

[0091] Preferably, the thermal conductivity of the substrate strips 11 is 0.4 W / m·K to 0.8 W / m·K. For example, 0.4 W / m·K, 0.42 W / m·K, 0.44 W / m·K, 0.46 W / m·K, 0.48 W / m·K, 0.5 W / m·K, 0.53 W / m·K, 0.56 W / m·K, 0.59 W / m·K, 0.6 W / m·K, 0.65 W / m·K, 0.7 W / m·K, 0.8 W / m·K, and the like.

[0092] In an embodiment, the water content of the substrate strip 11 is 5% to 20%. For example, it can be 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, and the like.

[0093] The water content of the substrate strip 11 is related to its thermal conductivity, and the thermal conductivity of water at room temperature is 0.599 W / m·K. In theory, the higher the water content of the medium, the higher its thermal conductivity.

[0094] If the water content is too high, most of the heat provided by the heating source is absorbed by the water, and less is used to heat the substrate strip 11, which may result in a small amount of smoke during the early stage of smoking, and the water vapor formed after the water is absorbed is at a high temperature, which may result in a relatively high content of water vapor in the aerosol, thereby causing the smoke temperature to be too high and the mouth to be scalded, affecting the smoking taste, but the effect on the amount of smoke during the later stage of smoking is relatively small. Moreover, if the water content is too high, the substrate strip may be deformed too much, affecting consistency.

[0095] It should be noted that the amount of smoke here refers to the amount of smoke generated by the aerosol generating substrate section 10 when the aerosol is smoked.

[0096] In the present embodiment, the water content of the substrate strip 11 is controlled to be in the range of 5% to 20%. On the one hand, the water content of the substrate strip 11 is not too low, thereby facilitating an increase in the thermal conductivity of the substrate strip 11, and the heat provided by the heating source can be fully transferred between the substrate strips 11, thereby enabling the aerosol generating substrate section 10 to generate aerosol sufficiently; on the other hand, the water content of the substrate strip 11 is not too high, and the portion of the heat provided by the heating source absorbed by the water is relatively small, thereby being more used to heat the substrate strip 11. Thus, it is beneficial to increase the amount of smoke during the early stage of smoking of the aerosol generating substrate section 10, and the amount of smoke during the use period of the aerosol generating substrate section 10 is more uniform. At the same time, the content of water vapor in the aerosol during the early stage of smoking is not too high, thereby facilitating the control of the temperature of the smoke during the early stage of smoking, reducing the probability of scalding the mouth during smoking, improving the smoking experience, and effectively controlling the deformation amount of the substrate strip.

[0097] The density of the substrate strip 11 can be designed as needed. For example, the density of the substrate strip 11 is 400 mg / cm 3 to 2000 mg / cm 3 . For example, it can be 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 1100 mg / cm 3 1200 mg / cm 3 1300 mg / cm 3 1400 mg / cm 3 1500 mg / cm 3 1600 mg / cm 3 1700 mg / cm 3 1800 mg / cm 3 1900 mg / cm 3 2000 mg / cm 3 and so on.

[0098] When the density of the substrate strip 11 is too high, the effective substance load is high, the porosity inside the substrate strip 11 is low, the heat diffusion efficiency is poor when heated, the aerosol generated by the front section of the aerosol generating substrate section 10 is relatively limited, the aerosol generated by the middle and rear sections is relatively sufficient, and the effective substance is fully released; when the density of the substrate strip 11 is too low, the effective substance load is low, the porosity inside the substrate strip 11 is high, the heat diffusion efficiency is good when heated, the aerosol generated by the front section of the aerosol generating substrate section 10 is relatively sufficient, and the aerosol generated by the middle and rear sections is obviously attenuated.

[0099] In this embodiment, the density of the substrate strip 11 is controlled within a suitable range, which is conducive to the relatively uniform generation of aerosol by the aerosol generating substrate section 10 during the use cycle, thereby improving the smoking experience.

[0100] Preferably, the density of the substrate strip 11 is 800 mg / cm 3 1300 mg / cm 3 .

[0101] The length of the substrate strip 11 can be designed as needed, and for example, the length of the substrate strip 11 is 6 mm-40 mm. For example, it can be 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 23 mm, 26 mm, 29 mm, 30 mm, 35 mm, 40 mm, and so on.

[0102] For example, the length of the substrate strip 11 is shown as D1 in FIG. 3.

[0103] The substrate strip 11 with such a length is convenient to process and form, and at the same time, the suction resistance during the suction of the aerosol is not too large, which is conducive to improving the suction taste.

[0104] In one embodiment, the cross-sectional dimension of the substrate strip 11 is in the range of 0.4mm to 7mm. For example, 0.4mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 3mm, 3.5mm, 4mm, 5mm, 7mm, etc.

[0105] The cross-section of the substrate strip 11 refers to the cross-section of the substrate strip 11 in a plane perpendicular to the first direction.

[0106] The cross-sectional dimension refers to the dimension of the outer contour used to define the cross-section of the substrate strip 11. For example, if the cross-section of the substrate strip 11 is circular, the cross-sectional dimension is the diameter of the cross-section of the substrate strip 11. If the cross-section is of other shapes, the cross-sectional dimension can be considered as the equivalent diameter or the length of the side of a polygon. For example, if the cross-section of the substrate strip 11 is square, the cross-sectional dimension is the maximum length of the cross-section of the substrate strip 11. If the cross-section of the substrate strip 11 is of other shapes other than circular and square, the cross-sectional dimension is the maximum dimension of the cross-section of the substrate strip 11, i.e. the distance between the two most distant points on the outer contour of the cross-section.

[0107] The shape of the cross-section of the substrate strip 11 (i.e. the cross-section perpendicular to the first direction) is not limited. For example, the shape of the cross-section of the substrate strip 11 can be polygonal (including but not limited to triangular, prismatic, square, etc. as shown in Figure 6), elliptical as shown in Figure 7, petal-shaped as shown in Figure 8, etc. The petal-shaped refers to a closed figure formed by a circle and a plurality of arcs surrounding the periphery of the circle. In addition, the shape of the cross-section of the substrate strip 11 can also be circular as shown in Figures 4, 5, 9 or 10, oblong, gear-shaped, irregular, etc. The oblong refers to a closed figure formed by two equal-length parallel lines connecting the end points of two semicircular arcs which are oppositely translated from each other and which divide a circle into two halves. The irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0108] Referring to Figure 5, in one embodiment, the aerosol generating substrate segment 10 further comprises a susceptor 13, and each substrate strip 11 is arranged around the periphery of the susceptor 13.

[0109] The susceptor 13 is arranged at a position relatively central to the aerosol generating substrate segment 10, and each substrate strip 11 is arranged around the periphery of the susceptor 13.

[0110] The shape of the susceptor 13 is not limited. For example, it can be granular, sheet-like as shown in Figure 5, columnar or cylindrical, etc.

[0111] The susceptor 13 can generate heat in the magnetic field, so as to heat the substrate rod 11 to make the substrate rod generate aerosol uniformly. That is, the aerosol generating substrate segment 10 of the embodiment is suitable for an aerosol generating device using electromagnetic heating as the heating mode.

[0112] In an embodiment, the aerosol generating substrate segment 10 is provided with a heating hole along the axial direction thereof, and the heating hole is used to accommodate a heating element of the aerosol generating device.

[0113] The aerosol generating substrate segment 10 heated by the heating hole is suitable for a central heating type aerosol generating device.

[0114] The heating hole is located in a region of the aerosol generating substrate segment 10 away from the center. That is, the plane in which the axis of the aerosol generating substrate segment 10 is located intersects with the space in the heating hole. More specifically, the axis of the heating hole coincides with the axis of the aerosol generating substrate segment 10. In this way, heat can be uniformly diffused from the center of the aerosol generating substrate segment 10 to the peripheral wall of the aerosol generating substrate segment 10, and the aerosol generating substrate segment 10 is heated more uniformly as a whole. In this way, the substrate rod is uniformly heated, so that the aerosol is released relatively stably, which is beneficial to improve the smoking experience.

[0115] The radial dimension of the heating hole is greater than the radial dimension of the heating element. That is, after the heating element is inserted into the heating hole, there is a gap between the hole wall of the heating hole and the heating element. Such a matching structure can be suitable for a heating element using infrared radiation heating and the like. During the process of heating the aerosol generating substrate segment 10 by the heating element, the heating element does not contact the aerosol generating substrate segment 10, thereby reducing the pollution of the heating element, and the taste of the aerosol is better. Using infrared radiation heating, but the heating element does not contact the substrate rod, which can appropriately increase the heating temperature of the heating element, which is beneficial to quickly smoke and realize instant smoking, that is, the user can smoke when he wants to smoke and stop when he wants to stop.

[0116] Please refer to FIG. 2 and FIG. 3. In an embodiment, the substrate rod 11 has an equal cross-sectional structure. That is, the shape and size of the cross section of the substrate rod 11 at any position thereof are the same. Using the equal cross-sectional structure can facilitate the processing and manufacturing of the substrate rod 11.

[0117] In other embodiments, the substrate rod 11 can also have a variable cross-sectional structure, which means that the shape or size of the cross section of the substrate rod 11 at at least one position thereof is different from the shape or size of the cross section at other positions thereof.

[0118] In an embodiment, the density of each of the strips 11 is the same. All of the strips 11 of the aerosol generating substrate section 10 can be prepared by using the same extruder with the same extrusion force, thereby facilitating a reduction in the cost of preparing the aerosol generating substrate section 10; or, each of the strips 11 can be extruded by using a mixture with the same solid and liquid material ratio, so that the production personnel do not need to prepare a plurality of mixtures with different solid and liquid material ratios, thereby facilitating an increase in the preparation efficiency of the strips 11, and thus an increase in the production efficiency of the aerosol generating substrate section 10.

[0119] In an embodiment, the density of at least one of the strips 11 is different from that of the other strips 11. That is, the aerosol generating substrate section includes at least two types of strips 11 with different densities.

[0120] In the present embodiment, in a cross section perpendicular to the first direction, the aerosol generating substrate section 10 includes both regions with a relatively low density and regions with a relatively high density. In the initial stage of heating, the infrared transmission efficiency of the regions with a relatively low density is higher than that of the regions with a relatively high density, and the heat capacity of the regions with a relatively low density is smaller, so the regions with a relatively low density can generate sufficient aerosol in the initial stage of smoking, which is more obvious for an infrared heating heating assembly. In the middle and later stages of smoking, although the aerosol generated by the regions with a relatively low density decays, the regions with a relatively high density can generate sufficient aerosol, so that the amount of aerosol released by the regions with a relatively low density and the regions with a relatively high density can be kept roughly the same in the initial, middle and later stages of smoking, thereby improving the consistency of smoking and thus improving the smoking experience.

[0121] Referring to FIGS. 4 to 8, in an embodiment, the shape and size of the cross section of each of the strips 11 are the same. Thus, the aerosol generating substrate section 10 can be prepared by using the same strips 11, thereby facilitating a reduction in the complexity of the strips 11 of the aerosol generating substrate section 10 and an increase in the production efficiency of the aerosol generating substrate section 10.

[0122] Referring to FIGS. 9 and 10, in an embodiment, the size of the cross section of at least one of the strips 11 is different from that of the other strips 11. That is, the aerosol generating substrate section 10 includes at least two types of strips 11 with different cross-sectional sizes.

[0123] It should be noted that the "different size of the cross section" can mean that the shape of the cross section is the same but the area of the cross section is different. For example, as shown in FIGS. 9 and 10, the shape of each of the strips 11 is circular, but the diameter of a part of the strips 11 is different from that of the other strips 11. Of course, the "different size of the cross section" can also mean that the shape of the cross section of at least one of the strips 11 is different from that of the other strips 11.

[0124] In addition, the distribution of the substrate strips 11 of different cross-sectional sizes on the cross section of the aerosol generating substrate segment 10 is not limited. For example, in the embodiment shown in FIG. 9, each substrate strip 11 is circular in shape, and the substrate strip 11 with a larger diameter is arranged on the outer periphery of the substrate strip 11 with a smaller diameter; for another example, in the embodiment shown in FIG. 10, each substrate strip 11 is circular in shape, and the substrate strip 11 with a smaller diameter is arranged on the outer periphery of the substrate strip 11 with a larger diameter.

[0125] In this embodiment, the cross-sectional size of at least one substrate strip 11 is different from those of the other substrate strips 11. That is, in the cross section perpendicular to the first direction, the aerosol generating substrate segment 10 has both substrate strips 11 with relatively large cross-sectional sizes and substrate strips 11 with relatively small cross-sectional sizes. Therefore, by matching the substrate strips 11 of different cross-sectional sizes, the filling rate, density, and porosity of the aerosol generating substrate segment 10 can be controlled, which is conducive to matching different heating assemblies and heating modes. For example, the aerosol generating substrate segment 10 with a high porosity is more suitable for being heated by an infrared heating assembly. The infrared light can more easily penetrate and reach the inside of the aerosol generating substrate segment 10, quickly generate aerosol, thereby improving the heating efficiency of the heating assembly, improving the uneven heating of the aerosol generating substrate segment 10, improving the uniformity of puff-by-puff smoking, and further improving the smoking experience. In addition, the porosity can change the airflow channel in the aerosol generating substrate segment 10. By controlling and designing the porosity, a better amount of smoke and taste can be obtained. By controlling and designing the density level, the initial amount of smoke and satisfaction can be improved, and the consistency of the smoking taste can also be improved.

[0126] Referring to FIG. 2, in an embodiment, the plurality of parallelly arranged substrate strips 11 extend along the first direction, and the angle between the first direction and the central axis direction of the aerosol generating substrate segment 10 is not greater than 10 degrees.

[0127] For example, the first direction is the direction indicated by L1 in FIG. 3.

[0128] The plurality of parallelly arranged substrate strips 11 extend along the first direction, that is, the extension direction of the substrate strip 11 is the first direction. The angle between the first direction and the central axis direction of the aerosol generating substrate segment 10 is not greater than 10 degrees. That is, due to the manufacturing precision of the substrate strip 11, the bundling process of each substrate strip 11, and other reasons, the extension direction of part of the substrate strips 11 may slightly deviate from the central axis direction of the aerosol generating substrate segment 10, or part of the substrate strips 11 may be bent. As long as the substrate strip 11 extends from one end of the aerosol generating substrate segment 10 to the other end, it can be considered that the substrate strip 11 extends along the first direction in the aerosol generating substrate segment 10.

[0129] Exemplarily, the first direction can be parallel to the central axis direction of the aerosol generating substrate segment 10, that is, the included angle between the first direction and the central axis direction of the aerosol generating substrate segment 10 is 0 degrees.

[0130] Parallel arrangement refers to that, in a projection plane parallel to the first direction, the projections of the substrate strips 11 at least partially overlap. That is, the substrate strips 11 are not sequentially connected end to end along the first direction, but are substantially parallel.

[0131] Referring to FIGS. 1 and 2, in an embodiment, the aerosol generating substrate segment 10 further includes a wrapping layer 12, which is wound to form an accommodation space in which all the substrate strips 11 are accommodated.

[0132] The wrapping layer 12 can be in a hollow tubular shape, and all the substrate strips 11 are accommodated in the accommodation space of the wrapping layer 12. Alternatively, the wrapping layer 12 can be a tipping paper, and all the substrate strips 11 are integrated into an integral structure by the tipping paper. The wrapping layer 12 can serve to shape and protect the substrate strips 11.

[0133] The filling rate of the aerosol generating substrate segment 10 can be designed as needed. Exemplarily, the filling rate of the aerosol generating substrate segment 10 is 40% to 90% (including the end point value), such as 40%, 50%, 60%, 70%, 80%, 90%, etc. When the filling rate of the aerosol generating substrate segment 10 is within this range, the effective load is more appropriate, which is conducive to the uniform generation of aerosol by the aerosol generating substrate segment 10 during the use cycle.

[0134] Exemplarily, referring to FIGS. 4 to 8, the sum of the cross-sectional areas of the substrate strips 11 accounts for 40% to 90% of the area of the wrapping layer 12. The present application also provides an aerosol generating article, referring to FIG. 11, which includes a functional segment 20, an outer wrapping layer (not shown), and the aerosol generating substrate segment 10 of any of the embodiments of the present application.

[0135] The substrate strips 11 extend along the first direction.

[0136] The functional segment 20 is arranged at one end of the aerosol generating substrate segment 10 along the first direction. The functional segment 20 includes a cooling segment 21 and a filter segment 22, and the cooling segment 21 is located between the filter segment 22 and the aerosol generating substrate segment 10. The outer wrapping layer wraps the outer circumferential side of the functional segment 20 and the aerosol generating substrate segment 10.

[0137] 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 aerosol, and the user sucks the filtered aerosol through the filter segment 22.

[0138] The heating manner of the heating assembly can be various, and exemplarily includes center heating and perimeter heating. The center heating manner refers to that the heating assembly is inserted into the aerosol generating substrate segment 10 to heat the aerosol generating substrate segment 10 from inside to outside. The perimeter heating manner refers to that the heating assembly is arranged at the periphery of the aerosol generating article to heat the aerosol generating substrate segment 10 from outside to inside. The heating manner can be electric resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, air heating, electric field heating, carbon source heating, etc., which are not limited herein.

[0139] The cooling segment 21 is arranged between the filter segment 22 and the aerosol generating substrate segment 10, and is used for cooling the aerosol before the filter segment 22 filters the aerosol, so as to reduce the temperature of the aerosol and improve the "burning mouth" phenomenon of the user when smoking the aerosol.

[0140] The material of the cooling segment 21 includes, but is not limited to, one or more combinations of PE (polyethylene), PLA (Polylactic acid, also known as polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), acetate fiber, propylene fiber material.

[0141] The material of the filter segment 22 includes, but is not limited to, one or more combinations of PE, PLA, PBAT, PP, acetate fiber, propylene fiber material.

[0142] The materials of the cooling segment 21 and the filter segment 22 can be the same or different.

[0143] It should be noted that the aerosol generating article generates aerosol by the aerosol generating substrate segment 10, and the functional segment 20 does not generate aerosol.

[0144] 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.

[0145] The outer wrapping layer can be in a hollow tubular shape, and the aerosol generating substrate segment 10 and the functional segment 20 can be arranged in the 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 combined into an integrated structure by the tipping paper.

[0146] The first direction is the arrangement direction of the aerosol generating substrate segment 10, the temperature reduction 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 along the first direction can be longer, or shorter, or the same as the length in other directions.

[0147] 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.

[0148] For another example, when the appearance profile of the aerosol generating substrate segment 10 is cuboid, the first direction is still the direction defined above, that is, the arrangement direction of the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22, or the direction of taking and placing the aerosol generating article on the aerosol generating device. The first direction of the aerosol generating substrate segment 10 can be any one of the length, width and height of the cuboid.

[0149] Exemplarily, please continue to refer to FIGS. 11 to 13, the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22 can be coaxially arranged cylindrical bodies, and the aerosol generating substrate segment 10 is an integral structure. The first direction is the axial direction of the aerosol generating substrate segment 10, the temperature reduction segment 21 and the filter segment 22.

[0150] Exemplarily, the length dimension of the aerosol generating substrate segment 10 along the first direction is 20% to 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.

[0151] Exemplarily, the length dimension of the temperature reduction segment 21 along the first direction can be 25% to 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.

[0152] It can be understood that, in the user's puffing process, the aerosol generated by the aerosol generating substrate segment 10 flows to the filter segment 22 along the first direction.

[0153] In an embodiment, please refer to FIGS. 11 and 12, the temperature reduction segment 21 has an airflow passage 21a, and the aerosol generating article further comprises a gas permeable film 30, which is arranged on the temperature reduction segment 21, and the airflow passage 21a is covered with the gas permeable film 30 at least near one end of the aerosol generating substrate segment 10.

[0154] That is, the gas permeable film 30 can be covered only at one end of the airflow passage 21a near the aerosol generating substrate segment 10, or the gas permeable film 30 can be covered at opposite ends of the airflow passage 21a, respectively.

[0155] The air-permeable film 30 is a film through which air flow can pass, that is, the aerosol generated by the aerosol generating substrate segment 10 can pass through the air-permeable film 30 into the air flow passage 21a and be cooled in the air flow passage 21a.

[0156] Exemplarily, the air-permeable film 30 can be cigarette paper, non-woven fabric, high molecular polymer, etc. with good air permeability.

[0157] Exemplarily, the air permeability of the air-permeable film 30 can be greater than or equal to 500 CU (CU is the abbreviation of cm 3 / (min*cm 2 *kpa).

[0158] The air-permeable film 30 covered by the air flow passage 21a at one end close to the aerosol generating substrate segment 10 can block the substrate rod 11 to prevent the substrate rod 11 from entering the air flow passage 21a in an accidental situation (such as the center heating heating element pushes the substrate rod 11 into the air flow passage 21a), thereby preventing the substrate rod 11 from entering the air flow passage 21a, reducing the amount of substrate rod 11 that can be heated, and affecting the heating effect, and preventing the substrate rod 11 from blocking the air flow passage 21a and affecting the draw resistance.

[0159] In addition, please refer to FIG. 12, the purpose of covering the air-permeable film 30 at opposite ends of the air flow passage 21a is to avoid distinguishing the assembly direction of the cooling segment 21 during the assembly of the aerosol generating article, thereby improving the convenience of assembly.

[0160] In other embodiments, please refer to FIG. 11 and FIG. 12, the cooling segment 21 has an air flow passage 21a, and the aerosol generating article further includes an air-permeable film 30, which can also not be provided on the cooling segment 21, such as the air-permeable film 30 provided on the aerosol generating substrate segment 10, and the aerosol generating substrate segment 10 covered by the air-permeable film 30 at least close to one end of the air flow passage 21a.

[0161] In other embodiments, the cooling segment 21 can also adopt other structural forms as long as it can play a cooling role.

[0162] In an embodiment, please refer to FIG. 13, the filter segment 22 has a suction passage 22a to play a role in adjusting the draw resistance.

[0163] In an embodiment, please refer to FIG. 11 to FIG. 13, the functional segment 20 further includes a flavoring segment 23, which is arranged between the cooling segment 21 and the filter segment 22 to play a role in smoke flavor compensation and improving the smoking taste.

[0164] The structure of the flavoring section 23 is not limited, and exemplarily, the flavoring section 23 can be provided with fiber cotton 231 subjected to flavoring treatment, or the flavoring section 23 can be provided with fiber cotton 231 and burst beads 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 beads 232 are arranged in the fiber cotton 231.

[0165] In other embodiments, the functional section 20 can also not be provided with the flavoring section 23.

[0166] In some embodiments, the aerosol generating article can not have the functional section 20, i.e., the aerosol generating substrate section 10 alone can constitute the aerosol generating article, for use in some special aerosol generating devices, for example, the aerosol generating device includes a mouthpiece and a cooling component, which can be reusable or disposable, and only the aerosol generating substrate section 10 is inserted into or removed from the heating space. The substrate rod 11 can be the substrate rod 11 and the assembly structure in all the above embodiments, which will not be repeated here.

[0167] In addition, for the aerosol generating substrate section 10 without the functional section 20, the air permeable film 30 can also be arranged at least one end of the aerosol generating substrate section 10 according to design needs.

[0168] In the above embodiments, the aerosol generating substrate section 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.

[0169] The aerosol generating substrate section 10 of the present application will be further described below in combination with specific test examples.

[0170] Test Example 1 of the Present Application

[0171] Test Sample: The substrate rod 11 is cylindrical, the substrate rod 11 has the same diameter and density, and the density is 1.119 mg / cm 3 , the diameter is 1.0 mm, the thermal conductivity is 0.58 W / m·K, the substrate rod 11 is uniformly distributed in the aerosol generating substrate section 10, the ratio of the sum of the cross-sectional areas of the substrate rod 11 to the cross-sectional area of the aerosol generating substrate section 10 is 73.58%, and the water content of the substrate rod 11 is 6.38%.

[0172] Test Instrument: Central heating aerosol generating device.

[0173] Test Conditions: 51%-56% RH, 25°C, clean room, 2s puffing and 28s pause, 11 puffs, 5 pieces in total.

[0174] Test Results: See Table 1 (all units are mg, PG is glycerol, and VG is propylene glycol).

[0175] Table 1

[0176] Data analysis: The average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of the test example 1 of the present application during the heating process was 7.11 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 13.41%. The puff-by-puff release of the aerosol generating agent, nicotine, and other effective substances in the smoke was very stable. The main reason was that the overall thermal conductivity of the substrate strip 11 was high, the ratio of the sum of the cross-sectional areas of the substrate strip 11 to the cross-sectional area of the aerosol generating substrate segment 10 was in a relatively high and appropriate range, and the water content of the substrate strip 11 was low. As a result, the aerosol generated by the aerosol generating substrate segment 10 during the entire heating process was stable and continuous, and the smoking experience was improved.

[0177] Test Example 2 of the present application

[0178] Test sample: The substrate strip 11 was in a cylindrical shape, and the substrate strip 11 had the same diameter and density. The density was 1.119 mg / cm 3 , the diameter was 1.0 mm, the thermal conductivity was 0.49 W / m·K, the substrate strip 11 was uniformly distributed in the aerosol generating substrate segment 10, the ratio of the sum of the cross-sectional areas of the substrate strip 11 to the cross-sectional area of the aerosol generating substrate segment 10 was 73.58%, and the water content of the substrate strip 11 was 6.77%.

[0179] Test instrument: The same as that of Test Example 1.

[0180] Test conditions: The same as those of Test Example 1.

[0181] Test results: See Table 2 (all units are mg, PG is propylene glycol, and VG is glycerol).

[0182] Table 2

[0183] Data analysis: The average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of the test example 2 of the present application during the heating process was 6.55 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 12.95%. The puff-by-puff release of the aerosol generating agent, nicotine, and other effective substances in the smoke was very stable. However, the average puff-by-puff aerosol amount was lower than that of the test example 1 of the present application. The main reason was that the overall thermal conductivity of the substrate strip 11 of the test example 2 of the present application was lower than that of the test example 1 of the present application. At the same time, the ratio of the sum of the cross-sectional areas of the substrate strip 11 to the cross-sectional area of the aerosol generating substrate segment 10 was in a relatively high and appropriate range, and the water content of the substrate strip 11 was low. As a result, the aerosol generated by the aerosol generating substrate segment 10 during the entire heating process was stable and continuous, and the smoking experience was also good.

[0184] Test Example 3 of the Present Application

[0185] Test Sample: The matrix strips 11 were in the shape of a cylinder, and the matrix strips 11 were identical in diameter and density, with a density of 1.119 mg / cm 3 , a diameter of 1.0 mm, and a thermal conductivity of 0.58 W / m·K. The matrix strips 11 were uniformly distributed in the aerosol generating substrate section 10, and the ratio of the sum of the cross-sectional areas of the matrix strips 11 to the cross-sectional area of the aerosol generating substrate section 10 was 57.38%. The moisture content of the matrix strips 11 was 6.89%.

[0186] Test Instrument: The same as Test Example 1.

[0187] Test Conditions: The same as Test Example 1.

[0188] Test Results: See Table 3 (all units are mg, PG is propylene glycol, and VG is glycerol).

[0189] Table 3

[0190] Data Analysis: The average value of the puff-by-puff aerosol amount (i.e., aerosol) generated by the aerosol generating substrate section 10 of Test Example 3 of the present application during heating was 6.14 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 19.35%. The puff-by-puff release of the aerosol generating agent, nicotine, and other effective substances in the smoke was very stable. However, the average puff-by-puff aerosol amount was lower than that of Test Example 1 of the present application, and the consistency of the puff-by-puff aerosol amount was poorer than that of Test Example 1 of the present application. In particular, the release of the aerosol amount in the latter section was significantly reduced. The main reason was that the ratio of the sum of the cross-sectional areas of the matrix strips 11 to the cross-sectional area of the aerosol generating substrate section 10 was 57.38%, which was significantly lower than that of Test Example 1 of the present application, and the effective load of the aerosol generating substrate section 10 was low, which led to insufficient replenishment of the effective substances after their full release.

[0191] Test Example 4 of the Present Application

[0192] Test Sample: The matrix strips 11 were in the shape of a cylinder, and the matrix strips 11 were identical in diameter and density, with a density of 1.119 mg / cm 3 , a diameter of 1.0 mm, and a thermal conductivity of 0.61 W / m·K. The matrix strips 11 were uniformly distributed in the aerosol generating substrate section 10, and the ratio of the sum of the cross-sectional areas of the matrix strips 11 to the cross-sectional area of the aerosol generating substrate section 10 was 73.58%. The moisture content of the matrix strips 11 was 12.31%.

[0193] Test Instrument: The same as Test Example 1.

[0194] Test Conditions: The same as Test Example 1.

[0195] Test results: see Table Four (all units are mg, PG is glycerol, and VG is propylene glycol).

[0196] Table Four

[0197] Data analysis: the average value of the puff-by-puff aerosol amount (i.e., aerosol) generated by the aerosol generating substrate segment 10 of the test example 4 of the present application during the heating process was 5.96 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 16.95%. The puff-by-puff release of the aerosol generating agent, nicotine, and other effective substances in the smoke generated in the front segment of the heating process was low, but it was significantly improved in the middle and rear segments. The main reason is that the moisture content of the substrate strip 11 was 12.31%, which was significantly higher than that of the test example 1 of the present application. More heat was absorbed by the water in the front segment before heating, and the release of the aerosol and other effective substances was delayed.

[0198] Test example 5 of the present application

[0199] Test sample: the substrate strip 11 was in a cylindrical shape, the medium roughness was 2 um, the substrate strip 11 had the same diameter and density, the density was 1.185 mg / cm3, the diameter was 1.0 mm, the thermal conductivity was 0.62 W / m·K, the substrate strip 11 was uniformly distributed in the aerosol generating substrate segment 10, the ratio of the sum of the cross-sectional areas of the substrate strip 11 to the cross-sectional area of the aerosol generating substrate segment 10 was 73.58%, and the moisture content of the substrate strip 11 was 6.38%.

[0200] Test instrument: the same as test example 1.

[0201] Test conditions: the same as test example 1.

[0202] Test results: see Table Five (all units are mg, PG is glycerol, and VG is propylene glycol).

[0203] Table Five

[0204] Data analysis: the average value of the puff-by-puff aerosol amount (i.e., aerosol) generated by the aerosol generating substrate segment 10 of the test example 1 of the present application during the heating process was 6.67 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 18.01%. The puff-by-puff release of the aerosol generating agent, nicotine, and other effective substances in the smoke was relatively stable, and the release in the front segment was weak. The main reason is that the substrate strip 11 has a low roughness, and the generated aerosol in the front segment after heating migrates slowly.

[0205] Test example 6 of the present application

[0206] Test sample: The matrix strips 11 were in the form of cylinders, the medium roughness was 12 um, the matrix strips 11 were identical in diameter and density, the density was 1.142 mg / cm3, the diameter was 1.0 mm, the thermal conductivity was 0.59 W / m·K, the matrix strips 11 were uniformly distributed in the aerosol generating substrate section 10, the ratio of the sum of the cross-sectional areas of the matrix strips 11 to the cross-sectional area of the aerosol generating substrate section 10 was 73.58%, and the water content of the matrix strips 11 was 6.38%.

[0207] Test instrument: The same as in Test Example 1.

[0208] Test conditions: The same as in Test Example 1.

[0209] Test results: See Table 6 (all units are mg, PG is glycerol, and VG is propylene glycol).

[0210] Table 6

[0211] Data analysis: The average value of the amount of aerosol (i.e., aerosol) generated by the aerosol generating substrate section 10 of the present application during the heating process was 7.66 mg / puff, and the RSD (relative standard deviation) of the amount of aerosol per puff was 9.6%. The release of the amount of aerosol, aerosol generating agents, nicotine, and other effective substances in the smoke per puff was very stable. The main reason is that the roughness of the matrix strips 11 is moderate, and the release rate of the effective substances in the medium strips during the heating process is smooth, which makes the aerosol generated by the aerosol generating substrate section 10 stable during the entire heating process, thereby improving the smoking experience.

[0212] Test Example 7 of the present application

[0213] Test sample: The matrix strips 11 were in the form of cylinders, the medium roughness was 50 um, the matrix strips 11 were identical in diameter and density, the density was 1.089 mg / cm3, the diameter was 1.0 mm, the thermal conductivity was 0.58 W / m·K, the matrix strips 11 were uniformly distributed in the aerosol generating substrate section 10, the ratio of the sum of the cross-sectional areas of the matrix strips 11 to the cross-sectional area of the aerosol generating substrate section 10 was 73.58%, and the water content of the matrix strips 11 was 6.38%.

[0214] Test instrument: The same as in Test Example 1.

[0215] Test conditions: The same as in Test Example 1.

[0216] Test results: See Table 7 (all units are mg, PG is glycerol, and VG is propylene glycol).

[0217] Table 7

[0218] Data analysis: the average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of the test example 1 during the heating process was 6.45 mg / puff, the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 19.93%, and the puff-by-puff release of the aerosol generating agent, nicotine and other effective substances in the smoke was not particularly stable. The main reason was that the roughness of the substrate strip 11 was too high, and the effective substances in the front segment of the medium strip were released too quickly during the heating process, but there was a relatively obvious attenuation in the middle and rear segments.

[0219] Comparative test example 1

[0220] Test sample: substantially the same as the test example 1 of the present application, except that the thermal conductivity of the substrate strip 11 was 0.19 W / m·K.

[0221] Test instrument: the same as the test example 1.

[0222] Test conditions: the same as the test example 1.

[0223] Test results: see Table Eight (all units are mg, PG is glycerol, and VG is propylene glycol).

[0224] Table Eight

[0225] Data analysis: the average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of the comparative test example 1 during the heating process was 5.03 mg / puff, the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 26.66%, the puff-by-puff release of the aerosol generating agent, nicotine and other effective substances in the smoke generated in the front segment during the heating process was very low, but there was a significant increase in the middle and rear segments. The main reason was that the thermal conductivity of the substrate strip 11 was significantly lower than that of the test example 1 of the present application, the heat absorbed by the heating medium was slower, and the release of the aerosol and other effective substances was delayed, resulting in a deviation in the average puff-by-puff aerosol amount and the consistency of the puff-by-puff aerosol amount, which affected the smoking experience.

[0226] Comparative test example 2

[0227] Test sample: substantially the same as the test example 1 of the present application, except that the water content of the substrate strip 11 was 22.76%.

[0228] Test instrument: the same as the test example 1.

[0229] Test conditions: the same as the test example 1.

[0230] Test results: see Table Nine (all units are mg, PG is glycerol, and VG is propylene glycol).

[0231] Table Nine

[0232] Data analysis: The average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of Comparative Test Example 2 during the heating process was 4.47 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 24.3%. The average puff-by-puff aerosol amount generated during the heating process was low, and the consistency of the puff-by-puff aerosol amount was deviated. The main reason was that the moisture content of the substrate strip 11 was 22.76%, which was significantly lower than that of Test Example 1 of the present application. Before heating, the substrate strip 11 absorbed more heat, and the release of aerosol and other effective substances was delayed, which affected the smoking experience.

[0233] Comparative Test Example 3

[0234] Test sample: The substrate strip 11 was replaced with a thick slurry method tobacco sheet, and the sheet density was 0.912 mg / cm 3 , the thickness was 220 um, the width was 1.0 mm, the thermal conductivity was 0.18 W / m·K, the ratio of the sum of the cross-sectional areas of the sheet to the cross-sectional area of the aerosol generating substrate segment 10 was 74.36%, and the moisture content of the sheet was 6.7%.

[0235] Test instrument: The same as Test Example 1.

[0236] Test conditions: The same as Test Example 1.

[0237] Test results: See Table Ten (all units are mg, PG is glycerol, and VG is propylene glycol).

[0238] Table Ten

[0239] Data analysis: The average value of the puff-by-puff aerosol amount (i.e. aerosol) generated by the aerosol generating substrate segment 10 of Comparative Test Example 3 during the heating process was 3.96 mg / puff, and the RSD (relative standard deviation) of the puff-by-puff aerosol amount was 28.09%. The average puff-by-puff aerosol amount generated during the heating process was low, and the consistency of the puff-by-puff aerosol amount was deviated. The main reason was that the thermal conductivity and density of the sheet substrate strip were significantly lower than those of the substrate strip 11 of the present application. The thermal conductivity and effective substance load of the aerosol generating substrate segment 10 were low, which affected the smoking experience.

[0240] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions 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 each embodiment can be combined in any way. 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 a plurality of substrate strips arranged in parallel in a bundle, adjacent substrate strips being at least partially in contact, each substrate strip extending from one end to the other end of the aerosol generating substrate segment, the average roughness of the surface of each substrate strip being 2 μm to 50 μm. 2.The aerosol generating substrate segment according to claim 1, wherein the thermal conductivity of each substrate strip is 0.3 W / m·K to 1.2 W / m·K; and / or, the moisture content of each substrate strip is 5% to 20%; and / or, the length of each substrate strip is 6 mm to 40 mm; and / or, the cross-sectional dimension of each substrate strip is 0.4 mm to 7 mm. The thermal conductivity of each substrate strip is 0.4 W / m·K to 0.8 W / m·K; and / or, the shape of the cross-section of each substrate strip is one of a polygon, an ellipse, a petal, a circle, a kidney, a gear, and a special shape; and / or, each substrate strip has a uniform cross-section. The density of the matrix strip is 400 mg / cm 3 ~ 2000 mg / cm 3 ; and / or, Each substrate strip has the same density; and / or, each substrate strip has the same shape and size of cross-section. The density of at least one substrate strip is different from that of the other substrate strips; and / or, the size of the cross-section of at least one substrate strip is different from that of the other substrate strips. The plurality of parallel substrate strips extend in a first direction, the angle between the first direction and the direction of the central axis of the aerosol generating substrate segment being no more than 10 degrees.

3. The rod of aerosol-generating substrate according to claim 1, wherein, The aerosol generating substrate segment further comprises a wrapping layer, the wrapping layer being wound to form a containing space, all the substrate strips being contained in the containing space. The density of the matrix strip is 800 mg / cm 3 ~ 1300 mg / cm 3 .

4. The aerosol generating substrate segment according to any one of claims 1-3, wherein, The filling rate of the aerosol generating substrate segment is 40% to 90%. The aerosol generating substrate segment comprises a susceptor, each substrate strip being arranged on the outer periphery of the susceptor.

5. The rod of aerosol-generating substrate according to claim 1, wherein, The aerosol generating substrate segment is provided with a heating hole extending in the axial direction thereof, the heating hole being configured to accommodate a heating member of an aerosol generating device, the size of the heating hole being greater than the size of the heating member. 12.An aerosol generating article comprising:

6. The rod of aerosol-generating substrate according to claim 1, wherein, The aerosol generating substrate segment according to any one of claims 1 to 11, the substrate strips extending in a first direction; a functional segment, the functional segment being 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; and 7. An aerosol-generating substrate segment according to claim 5 or 6, wherein, a wrapping layer, the wrapping layer being wrapped on the outer periphery of the functional segment and the aerosol generating substrate segment.

8. The rod of aerosol-generating substrate according to claim 5 or 6, wherein, The temperature reducing segment has an airflow passage, the aerosol generating article further comprising a gas permeable film; 9. An aerosol-generating substrate segment according to claim 8, wherein, The gas permeable film is arranged on the temperature reducing segment, and the airflow passage is covered with the gas permeable film at least near one end of the aerosol generating substrate segment; or, 10. The rod of aerosol-generating substrate according to claim 1, wherein, The gas permeable film is arranged on the aerosol generating substrate segment, and the aerosol generating substrate segment is covered with the gas permeable film at least near one end of the airflow passage.

11. The rod of aerosol-generating substrate according to claim 1, wherein, 14.An aerosol generating article comprising: The aerosol generating substrate segment according to any one of claims 1 to 11; and a gas permeable film, the gas permeable film being arranged on at least one end of the aerosol generating substrate segment. ​ ​ ​ 13. An aerosol-generating article according to claim 12, wherein, ​ ​ ​ ​ ​ ​ ​

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