Aerosol generating product

Abstract

The invention discloses an aerosol generating product, comprising: a fuming section comprising an aerosol forming base material, the aerosol forming base material being used for generating aerosol in a heating state for a user to smoke, the sum of the outer surface areas of the aerosol forming base material being A, the volume of the fuming section being V, the interfacial area density A / V of the fuming section satisfying: 3000 m <-1 > < A / V < 10000 m <-1 >, the length of the fuming section being l, and the aerosol forming base material being used for generating aerosol in a heating state for the user to smoke, the sum of the outer surface areas of the aerosol forming base material being A, the volume of the fuming section being V; the cross section area of the fuming section is S, the dynamic viscosity of the air is mu, the volume flow rate of the air flowing through the fuming section is Q, the pressure drop of the air flowing through the fuming section with the length of l is P, and the flow resistance coefficient R of the fuming section meets the condition that R is larger than 5 * 10 < 8 > m <-2 > and smaller than 1 * 10 < 10 > m <-2 >. By the adoption of the technical scheme, under the heating condition, the aerosol generating product has the high aerosol release amount and the high base material utilization rate, meanwhile, the burnt smell can be effectively avoided, the suction resistance is appropriate when a user smokes the aerosol generating product, under the smoking condition, the smoke strength is appropriate, irritation is small, and the smoking experience of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heat-not-burn, and particularly relates to an aerosol generating article. BACKGROUND

[0002] During the combustion process of traditional tobacco, a large amount of harmful substances are generated due to high-temperature pyrolysis. In order to reduce the content of harmful substances in smoke, heat-not-burn new-type tobacco products, i.e. aerosol generating articles, have emerged. The aerosol generating article is placed in a heating-type aerosol generating device matched therewith, and aerosol can be generated under heating conditions to form smoke. Compared with traditional combustion-type cigarettes, the amount of harmful substances released in smoke is significantly reduced due to the avoidance of tobacco combustion in the new-type tobacco products. At the same time, the amount of effective smoke components released to provide a satisfactory smoking experience is also reduced in the heat-not-burn new-type tobacco products.

[0003] In order to increase the amount of smoke components released, it is often desired to add more aerosol-forming substrates to the new-type tobacco products (heat-not-burn cigarettes). Since the heat-not-burn cigarettes need to be used in cooperation with specific heating equipment, the volume of the heat-not-burn cigarettes is limited, which makes it impossible to add more aerosol-forming substrates to the heat-not-burn cigarettes. In addition, for a heat-not-burn cigarette with a certain volume, if more aerosol-forming substrates are added to the cigarette, the substrates may be too densely packed. On the one hand, this may result in poor airflow and large resistance, and at the same time, the user may not get enough strength when using conventional suction. On the other hand, the densely packed substrates may hinder the effective transfer of heat, resulting in uneven temperature distribution in the cigarette, local high temperature, burnt taste, release of harmful substances, and greatly affecting the user's smoking experience. In addition, the densely packed substrates may also result in ineffective heating of part of the products, thereby reducing the effective utilization rate of the aerosol-forming substrates and causing waste. The aerosol generating article needs to be designed to solve the above technical problems. SUMMARY

[0004] The present application provides the following technical solutions to solve the above technical problems.

[0005] The present application provides an aerosol generating article, comprising:

[0006] A smoking segment containing aerosol-forming substrates for generating aerosol for a user to smoke under a heating condition, wherein the sum of the outer surface areas of the aerosol-forming substrates is A, the volume of the smoking segment is V, and the interface area density A / V of the smoking segment satisfies: 3000m ﹣1 <A / V<10000m ﹣1, the length of the smoking segment is l, the cross-sectional area of the smoking segment is S, the dynamic viscosity of the air is μ, the volume flow of the air flowing through the smoking segment is Q, the pressure drop of the air flowing through the smoking segment with the length of l is ΔP, the flow resistance coefficient of the smoking segment is R, and the length of the smoking segment is l R satisfies: 5x10 8 m ﹣2 < R < 1x10 10 m ﹣2 .

[0007] With the above technical solution, the aerosol generating article releases more smoke under heating conditions while effectively avoiding the problem of burnt taste and the release of harmful substances. The user has a suitable suction resistance during smoking, sufficient strength, and less irritation, improving the user's smoking experience.

[0008] Specifically, the interface area density A / V of the smoking segment can be: 3000m ﹣1 < A / V < 4000m ﹣1 or 4000m ﹣1 < A / V < 5000m ﹣1 or 5000m ﹣1 < A / V < 6000m ﹣1 or 6000m ﹣1 < A / V < 7000m ﹣1 or 7000m ﹣1 < A / V < 8000m ﹣1 or 8000m ﹣1 < A / V < 9000m ﹣1 or 9000m ﹣1 < A / V < 10000m ﹣1 or 4000

[0009] m ﹣1 < A / V < 9000m ﹣1 .

[0010] Specifically, the flow resistance coefficient R of the smoking segment can be: 5x10 8 m ﹣2 < R < 5x10 9 m ﹣2 or 5x10 9

[0011] m ﹣2 < R < 1x10 10 m ﹣2 or 8x10 8 m ﹣2 < R < 8x10 9 m ﹣2 .

[0012] Optionally, the outer surface area of the single aerosol-forming substrate is a, and a satisfies: 0.5mm 2 < a < 45mm 2 . Specifically, it can be 0.5mm 2 < a < 5mm 2 or 5mm 2 < a < 10mm 2 or 10mm 2 < a < 15mm 2 or 15mm 2 < a < 20mm 2 or 20mm 2 < a < 25mm 2 or 25mm 2 < a < 30mm 2 or 30mm 2 < a < 35mm 2 or 35mm 2 < a < 40mm 2 or 40mm 2 < a < 45mm 2 .

[0013] Optionally, the aerosol-forming substrate has a shape of a strip.

[0014] Optionally, the sheet-shaped aerosol-forming substrate has a length and a width, wherein the length is in a range of 1-40mm, and the ratio of the length to the width is in a range of 1-80. Specifically, the length can be in a range of 1-5mm or 5-10mm or 10-15mm or 15-20mm or 20-25mm or 25-30mm or 30-35mm or 35-40mm. Specifically, the ratio of the length to the width can be in a range of 1-10 or 10-20 or 20-30 or 30-40 or 40-50 or 50-60 or 60-70 or 70-80.

[0015] Optionally, part or all of the aerosol-forming substrate is arranged along an axial direction of the aerosol generating article.

[0016] Optionally, the number of the aerosol-forming substrates arranged along the axial direction of the aerosol generating article is n1, and the total number of the aerosol-forming substrates in the aerosol generating article is n2, wherein n1 / n2≥80%, specifically, n1 / n2≥85% or n1 / n2≥90% or n1 / n2≥95% or n1 / n2=100%.

[0017] Optionally, the aerosol-forming substrate comprises a through hole penetrating through the thickness direction of the aerosol-forming substrate.

[0018] Optionally, the equivalent diameter of the through hole is d, the equivalent diameter is the diameter of a circle equivalent to the area of the through hole, the width of the aerosol-forming substrate where the through hole is located is w, and 0 < d / w ≤ 30%. Specifically, the range of d / w can be 0 < d / w ≤ 5% or 5% < d / w ≤ 10% or 10% < d / w ≤ 15% or 15% < d / w ≤ 20% or 20% < d / w ≤ 25% or 25 < d / w ≤ 30%.

[0019] Optionally, the through hole is a plurality of through holes, the sum of the areas of the plurality of through holes is x, and the area of the aerosol-forming substrate where the through hole is located is y, wherein 0 < x / y ≤ 10%. Specifically, the range of x / y can be 0 < x / y ≤ 2% or 2% < x / y ≤ 4% or 4% < x / y ≤ 6% or 6% < x / y ≤ 8% or 8% < x / y ≤ 10%.

[0020] Optionally, the aerosol-forming substrate comprises an aerosol-forming agent, and the mass ratio of the aerosol-forming agent to the aerosol-forming substrate is 5% to 25%. Specifically, the mass ratio of the aerosol-forming agent to the aerosol-forming substrate can be 5% to 10% or 10% to 15% or 15% to 20% or 20% to 25%.

[0021] Optionally, 11 mm ≤ l ≤ 45 mm. Specifically, the range of l can be 11 mm ≤ l ≤ 20 mm or 20 mm ≤ l ≤ 30 mm or 30 mm ≤ l ≤ 40 mm or 40 mm ≤ l ≤ 45 mm.

[0022] Optionally, the aerosol-forming substrate is reconstituted tobacco. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A cross-sectional view of an aerosol-generating article according to an embodiment of the application is shown Figure 1 ;

[0024] Figure 2 A cross-sectional view of an aerosol-generating article according to an embodiment of the application is shown Figure 2 ;

[0025] Figure 3 A top view of an aerosol-forming substrate according to an embodiment of the application is shown

[0026] Figure 4 A cross-sectional view of a smoking segment according to an embodiment of the application is shown DETAILED DESCRIPTION

[0027] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0028] The term "aerosol-generating article" is used herein to refer to an article that, when heated, can generate an inhalable aerosol and deliver it to a consumer. An "aerosol-generating article" comprises an aerosol-forming substrate and a filter portion, and may be, for example, a heated cigarette made by wrapping an aerosol-forming substrate, such as tobacco, in paper and combining it with a filter. The aerosol-generating article is used in conjunction with an aerosol-generating device for heating or by employing other heat-non-combustible methods to generate an aerosol for inhalation.

[0029] The term "smoke-generating section" is used herein to describe articles comprising an aerosol-forming substrate that can be heated to generate an aerosol and delivered to a consumer. The term "aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds upon heating to generate an aerosol. During use, the volatile compounds are released from the aerosol-forming substrate via heat transfer. The smoke-generating section may be a solid smoke-generating section. The smoke-generating material may include tobacco-containing material containing volatile tobacco flavor compounds released from the substrate upon heating. The smoke-generating material may include non-tobacco materials. The smoke-generating section may include an aerosol-forming agent. The aerosol-forming agent may include at least one of glycerol and propylene glycol. In embodiments where the smoke-generating material is solid, the solid smoke-generating material may include one or more of the following: powder, granules, pellets, fragments, tubes, strips, or sheets, containing one or more of the following: herbaceous leaves, tobacco leaves, tobacco rib sheets, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. The solid smoke-generating material may be in loose form. The smoke-generating section may include a rod of solid smoke-generating material. Packaging materials can wrap the solid smoke-generating rod, and the packaging materials include paper.

[0030] The term "aerosol forming substrate" refers to a substrate capable of releasing volatile compounds that can form aerosols. Such volatile compounds can be released by heating the aerosol forming substrate. Aerosol forming substrates can be adsorbed, coated, impregnated, or otherwise loaded onto a carrier or support. Aerosol forming substrates can conveniently be part of aerosol-generating articles or smoking articles. Aerosol forming substrates may include tobacco, for example, they may include tobacco-containing materials containing volatile tobacco flavor compounds that are released from the aerosol forming substrate upon heating.

[0031] In a preferred embodiment, the aerosol forming substrate may include homogeneous tobacco material, such as cast leaf tobacco. The aerosol forming substrate may include, for example, one or more of the following: powders, granules, pellets, fragments, spaghetti-like pieces, strips, or sheets containing vanilla leaves, tobacco leaves, tobacco ribs, tobacco sheets, homogeneous tobacco, extruded tobacco, and expanded tobacco. The aerosol forming substrate may be in loose form or may be disposed in a suitable container or box.

[0032] The term "aerosol forming agent" refers to any suitable known compound or mixture of compounds that, in use, facilitates the formation of a dense and stable aerosol. Aerosol forming agents may include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of monocarboxylic acids, dicarboxylic acids, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Aerosol forming agents may be polyols or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and glycerol. Aerosol forming agents may include at least one of glycerol and propylene glycol.

[0033] The term "reconstituted tobacco" refers to the process of crushing tobacco materials such as tobacco stems, tobacco dust, and tobacco leaf fragments, mixing them with adhesives, reinforcing agents, humectants, and water in a certain proportion, forming loose granules, then rolling them into sheets using a roller press, drying them, and finally cutting them into reconstituted tobacco shreds using a shredder; or crushing tobacco materials and mixing them into an aqueous solution containing adhesives, reinforcing agents, humectants, and water, stirring them evenly to form a slurry, spreading it evenly, drying it into sheets, then peeling it off and cutting it into reconstituted tobacco shreds using a shredder; or soaking tobacco stems, fragments, and tobacco dust in hot water for extraction and then separating the solid and liquid components, vacuum concentrating the resulting extract and preparing it as a coating liquid, while the remaining solid residue is pulped and formed into sheet bases on a paper machine, then the coating liquid is evenly applied to the surface of the sheet bases, dried to form reconstituted tobacco, and finally cut into reconstituted tobacco shreds using a shredder.

[0034] The term "common tobacco leaf" refers to tobacco leaves that have been harvested, dried in the sun or oven, and then shredded into tobacco shreds. An aerosol forming agent is then sprayed onto these shredded tobacco leaves to obtain an aerosol forming substrate.

[0035] The term "elongated" refers to an object that is slender and strip-shaped, typically with a relatively long length and a relatively small width and thickness. Elongated shapes can include sheet-like or filament-like forms. The term "sheet-like" refers to a thin, sheet-like element whose width and length are significantly greater than its thickness. In aerosol-generating articles, the direction of the elongated sheet substrate aligned with the length direction of the aerosol-generating article is called the elongated direction. The length is the dimension along the main axis of the substrate or the elongated direction; the width is the dimension of the elongated substrate in the direction perpendicular to its length; and the thickness is the dimension of the elongated object in the direction perpendicular to both its length and width.

[0036] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0038] This invention provides an aerosol generating article, comprising:

[0039] The smoke-generating section includes an aerosol-forming substrate, which generates aerosols for user inhalation under heating. The sum of the outer surface areas of the aerosol-forming substrate is A, the volume of the smoke-generating section is V, and the interfacial area density A / V of the smoke-generating section satisfies 3000 m² / g. ﹣1 <A / V<10000m ﹣1 The length of the smoke-generating section is l, the cross-sectional area of ​​the smoke-generating section is S, the dynamic viscosity of the air is μ, the volumetric flow rate of the air flowing through the smoke-generating section is Q, the pressure drop through the smoke-generating section of length l is ΔP, and the flow resistance coefficient of the smoke-generating section is... R satisfies: 5 × 10 8 m ﹣2 <R<1×10 10 m ﹣2 .

[0040] Using the above technical solution, under heating conditions, the aerosol-generated product has a high aerosol release rate and substrate utilization rate, while effectively avoiding burnt smell. The suction resistance is suitable when the user inhales, and the smoke strength is appropriate and less irritating under inhalation conditions, thus improving the user's inhalation experience.

[0041] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] like Figures 1-2 and Figure 4 As shown, the aerosol generating article 1 provided by the present invention includes a smoke-generating section 2, a first cooling section 3, a second cooling section 4, and a filter section 5. The smoke-generating section 2 includes an aerosol forming substrate 6 and voids 7. The aerosol forming substrate 6 generates aerosol under heating conditions, which is then cooled sequentially through the first cooling section 3 and the second cooling section 4, and finally reaches the filter section 5 for the user to inhale. The smoke-generating section 2, the first cooling section 3, the second cooling section 4, and the filter section 5 are all wrapped with wrapping paper 8.

[0043] Given that the sum of the outer surface areas of the aerosol forming substrate 6 is A, the volume of the smoke-generating section 2 is V, the length of the smoke-generating section 2 is l, the cross-sectional area of ​​the smoke-generating section is S, the dynamic viscosity of air under suction conditions is μ, the volumetric flow rate of air flowing through the smoke-generating section 2 is Q, and the pressure drop through the smoke-generating section 2 of length l is ΔP, then the interfacial area density of the smoke-generating section 2 is A / V, and the flow resistance coefficient of the smoke-generating section is...

[0044] Interfacial area density refers to the interfacial area of ​​a solid (aerosol forming substrate) in contact with gas per unit volume. Since external air may come into contact with every surface of the aerosol forming substrate 6 during inhalation, the sum A of the outer surface areas of the aerosol forming substrate 6 in this invention is the sum of the areas of all the outer surfaces of all aerosol forming substrates 6 in the smoke-generating section 2. Increasing the interfacial area density increases the contact area between external air and the aerosol forming substrate 6, thereby providing a greater aerosol release. Because interfacial area density is closely related to the content of the aerosol forming substrate 6, increasing the amount of aerosol forming substrate 6 in the smoke-generating section 2 helps to increase the interfacial area density. However, for a certain specification of heated cigarette, a larger amount of aerosol forming substrate 6 means that the tobacco material needs to be arranged more densely, which leads to the problems mentioned above, such as excessive draw resistance, burnt taste, and low substrate utilization.

[0045] The flow resistance coefficient of the smoke-generating section reflects the resistance encountered by a fluid (such as air) when flowing through a specific channel (such as smoke-generating section 2). Since the flow resistance coefficient R of the smoke-generating section is closely related to the content of aerosol-forming substrate 6 filled in smoke-generating section 2, a too-small flow resistance coefficient means that the content of aerosol-forming substrate 6 in the smoke-generating section is relatively small, resulting in less aerosol release. Conversely, an excessive content of aerosol-forming substrate 6 will result in an excessively large flow resistance coefficient, meaning greater suction resistance, causing users to inhale forcefully and significantly affecting the vaping experience. Furthermore, an excessive content of aerosol-forming substrate 6 can cause uneven temperature distribution, leading to locally excessively high temperatures that produce a burnt smell and release irritating components. Moreover, excessive flow resistance may result in an insufficient volumetric flow rate Q of air flowing through the smoke-generating section, which reduces convective mass transfer efficiency, affects the aerosol release of heated cigarettes, and thus results in insufficient smoke volume and strength obtained by users with conventional inhalation.

[0046] Research has found that when the interface area density A satisfies: 3000m³ ﹣1 <A / V<10000m ﹣1 The flow resistance R in the smoke-generating section satisfies: 5 × 10 8 m ﹣2 <R<1×10 10 m ﹣2 Under heating conditions, this aerosol-generated product exhibits high aerosol release and substrate utilization, while effectively avoiding a burnt taste. The suction resistance is suitable for users, and the smoke strength is appropriate with minimal irritation, improving the user's vaping experience. Specifically, within the aforementioned interface area density range, it is possible to increase the aerosol release by dividing individual aerosol substrates into finer segments, thereby increasing the contact area between the aerosol substrate and the gas and promoting convective mass transfer, all while maintaining the same aerosol substrate filling amount. However, excessively fine aerosol-forming substrates can lead to complex and chaotic gas flow gaps, increasing suction resistance. Furthermore, excessively fine aerosol-forming substrates are prone to falling off the ends of the smoke-generating section, causing end-end shedding and affecting product quality stability. Therefore, this invention maintains the interfacial area density within the aforementioned range, resulting in better stability of the aerosol-generated product. Furthermore, the flow resistance coefficient of the smoke-generating section is controlled within the aforementioned range, allowing users to obtain more aerosol with lower suction force, thus achieving greater satisfaction with a smooth suction experience while avoiding the generation and ingestion of irritating components. Specifically, the outer surface area of ​​a single aerosol-forming substrate is 'a', where 'a' satisfies: 0.5 mm². 2 <a<45mm 2Furthermore, the aerosol forming substrate in this invention has a regular or approximately regular three-dimensional geometric shape (a geometric shape existing in three-dimensional space, having three dimensions: length, width, and height). For example, the aerosol forming substrate may be elongated (approximately a cuboid with a certain thickness), with each face of the elongated shape being rectangular. Therefore, the sum of the outer surface areas A of the aerosol forming substrates refers to the sum of the outer surface areas of all aerosol forming substrates in the smoke-generating section. For example, if the total number of aerosol forming substrates in the smoke-generating section is n2, and the sum of the areas of the six faces of each aerosol forming substrate is equal and is a1, then the sum of the outer surface areas A of the aerosol forming substrates = n2 × a1.

[0047] Since each face of the elongated aerosol forming substrate is rectangular, the area of ​​each face can be calculated using the formula for the area of ​​a rectangle. For example, if the diameter of the smoke-generating section is 7.2 mm and its length is 13 mm, and the number of aerosol forming substrates is n2, where each individual elongated aerosol forming substrate has a length of 6 mm, a width of 1 mm, and a thickness of 0.18 mm, then a1 = (6 × 1 + 6 × 0.18 + 1 × 0.18) × 2 = 14.52 mm 2 =1.452×10 ﹣5 m 2 The volume of the smoke-generating section is V = π × r. 2 ×L=π×(7.2÷2) 2 ×13=168.48π≈529.0272mm 3 =5.29×10 ﹣7 m 3 Therefore, the interfacial area density of the smoke segment is A / V = 14.52 × n² / 529.027² ≈ 0.04385 mm². ﹣1 = n² × 4.385 × 10 ﹣5 m ﹣1 .

[0048] Furthermore, when calculating the number n² of aerosol forming substrates, the length, width, and thickness of a single aerosol forming substrate strip can be measured first to obtain its volume. Then, the mass of a single aerosol forming substrate strip can be measured, and its density can be obtained by establishing a ratio between mass and volume. Next, the total mass of all aerosol forming substrates in the smoke-generating section is measured, and the total volume of the aerosol forming substrates is obtained by establishing a ratio between the total mass and the aforementioned density. Finally, the number of aerosol forming substrate strips can be obtained by establishing a ratio between the total volume of the aerosol forming substrates and the volume of a single aerosol forming substrate strip. For example, if each long strip of aerosol forming substrate in the smoke-generating section has a length of 6 mm, a width of 1 mm, and a thickness of 0.18 mm, and the mass of each aerosol forming substrate strip is 1.1232 mg, and the total mass of the aerosol forming substrates is 285 mg, then the volume of a single aerosol forming substrate is 6 × 1 × 0.18 = 1.08 mm². 3 =1.08×10 ﹣9 m 3 The density of the single aerosol forming substrate is 1040 kg / m³. 3 The total volume of the aerosol-forming substrate = 285 / 1040 = 2.74 × 10 ﹣7 m 3 Therefore, the number of aerosol-forming substrate strips is: n2 = 2.74 × 10⁻⁶ ﹣7 / (1.08×10 ﹣9 =254. Then, substituting the measured quantity n2 of the aerosol-forming substrate into the above formula A = n2 × a1, the sum of the outer surface areas A of the aerosol-forming substrates can be obtained. Then, by establishing a ratio between the sum of the outer surface areas A of the aerosol-forming substrates and the volume V of the smoke-generating section, the interfacial area density A / V can be obtained. Specifically, the elongated aerosol-forming substrate has a length and a width, wherein the length is in the range of 1–40 mm, and the ratio of length to width is in the range of 1–80.

[0049] Furthermore, such as Figure 1 As shown, part or all of the aerosol forming substrate 6 is along the axial direction of the aerosol forming article 1 (e.g., Figures 1-2 The aerosol forming substrates 6 in the smoke-generating section 2 are arranged in the X direction, so that they extend axially. Specifically, each aerosol forming substrate 6 can be placed along the axial direction of the aerosol generating article 1. Since the axial direction is along the airflow path, airflow resistance can be reduced, allowing the user to maintain a comfortable inhalation experience.

[0050] Furthermore, the aerosol forming substrate is in the form of filaments or sheets. The number of filaments or sheets of aerosol forming substrate arranged along the axial direction of the aerosol-generated product is n1, and the total number of aerosol forming substrates is n2, wherein n1 / n2≥80%. n1 / n2≥80% means that most of the aerosol forming substrates are arranged along the axial direction, which ensures that the suction resistance is within a suitable range, thereby providing users with a better suction experience.

[0051] Furthermore, such as Figure 3 As shown, the aerosol forming substrate 6 includes components along the thickness direction of the aerosol forming substrate 6 (e.g., Figure 1 and Figure 2 The through-hole 9 (in the Z direction) further increases the amount of aerosol released and reduces the flow resistance coefficient. Specifically, the through-hole 9 in the aerosol forming substrate 6 increases the interfacial area density, thereby increasing the contact area between external air and the aerosol forming substrate 6, promoting convective mass transfer, and generating more aerosols. Simultaneously, the through-hole 9 in the aerosol forming substrate 6 facilitates smoother communication between gaps in different substrates, thus reducing the flow resistance coefficient.

[0052] Furthermore, such as Figure 3 As shown, the equivalent diameter of the through hole 9 is d, and the width of the aerosol forming substrate 6 containing the through hole 9 is w, where 0 < d / w ≤ 30%. The equivalent diameter is the diameter of a circle with an area equal to that of the through hole. For example, if the through hole is rectangular and its area is x, then it can be calculated according to x = π(d / 2). 2 The equivalent diameter d is calculated. It should be noted that the aerosol forming substrate 6 used in this invention can be either reconstituted tobacco or ordinary tobacco. Since perforating reconstituted tobacco shreds or sheets, or ordinary tobacco shreds, may cause the aerosol forming substrate 6 to fragment or even break, to avoid fragmentation and breakage, this invention controls the ratio of the equivalent diameter d of the through hole 9 to the width w of the aerosol forming substrate 6 containing the through hole 9 to below 30%. This ensures that the aerosol forming substrate 6 has high strength and toughness, while also providing users with a higher aerosol release rate and more suitable suction resistance.

[0053] Furthermore, such as Figure 3As shown, there are multiple through holes 9, the sum of the areas of the multiple through holes 9 is x, and the area of ​​the aerosol forming substrate 6 containing the through holes is y, where 0 < x / y ≤ 10%. This arrangement further ensures that the aerosol forming substrate 6 has high strength and toughness. For example, if there are ten through holes 9, and the equivalent diameter d of each through hole 9 is 0.1 mm, and the length of the elongated aerosol forming substrate is 6 mm and the width is 1 mm, then the sum of the areas of the ten through holes 9 is x = π × (0.1 ÷ 2). 2 ×10=0.025mm 2 y = 6 × 1 = 6 mm, x / y = 0.025 / 6 = 0.4%. Research has found that when 0 < d / w ≤ 30% and 0 < x / y ≤ 10% are simultaneously satisfied, the aerosol forming substrate 6 exhibits better strength and toughness.

[0054] Furthermore, 4000m ﹣1 <A / V<9000m ﹣1 8×10 8 m ﹣2 <R<8×10 9 m ﹣2 This can further increase the release of aerosols, further control the draw resistance within a suitable range while maintaining the strength of the smoke and suppressing irritating components.

[0055] Furthermore, the aerosol forming substrate includes an aerosol forming agent, and the mass ratio of the aerosol forming agent to the aerosol forming substrate is 5% to 25%. Since the aerosol-generating article provided by this invention has low absorption resistance and high aerosol release, the content of the aerosol forming agent can be appropriately increased, thereby increasing the aerosol release. Specifically, the mass ratio of the aerosol forming agent to the aerosol forming substrate is 5% to 10%, 10% to 15%, 15% to 20%, or 20% to 25%.

[0056] Furthermore, 11mm ≤ l ≤ 45mm. This further ensures that the smoke-generating section has good temperature uniformity and sufficient aerosol substrate.

[0057] Furthermore, the aerosol forming substrate is reconstituted tobacco. Because reconstituted tobacco has better strength and is less prone to breakage even when perforated, choosing reconstituted tobacco as the aerosol forming substrate can improve the strength of the tobacco generation section.

[0058] The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0059] Example 1

[0060] The tobacco leaves are pulverized into particles of about 300 mesh, and then mixed with aerosol generating agent, adhesive and water in a mass ratio of 20:5:0.5:10. The mixture is then rolled into reconstituted tobacco leaves with a thickness of about 0.15 mm. After drying, the leaves are cut into loose reconstituted tobacco shreds with an average length and width of about 6 mm and 1 mm, respectively. Four circular through holes with a diameter of 0.2 mm are made in the middle of the length direction using a micro drill bit.

[0061] Example 2

[0062] Ordinary tobacco leaves with a thickness of approximately 0.1 mm were cut into loose filaments with an average length of approximately 3.5 mm and a width of approximately 1.2 mm. An aerosol forming agent was sprayed onto the surface of the tobacco filaments to allow it to adhere, resulting in filamentous aerosol forming substrate strips containing the aerosol forming agent. Subsequently, two circular through holes with a diameter of approximately 0.1 mm were drilled in the middle of the length direction using a micro-drill.

[0063] Comparative Example 1

[0064] The tobacco leaves are pulverized into particles of about 300 mesh, and then mixed with aerosol generating agent, adhesive and water in a mass ratio of 20:5:0.5:10. After mixing, the mixture is rolled into reconstituted tobacco sheets with a thickness of about 0.3 mm. After drying, the sheets are cut into individual reconstituted tobacco shreds with an average length and width of about 12 mm and 3 mm, respectively.

[0065] Comparative Example 2

[0066] The tobacco leaves are pulverized into particles of about 300 mesh, and then mixed with aerosol forming agent, adhesive and water in a mass ratio of 20:5:0.5:10. The mixture is then rolled into reconstituted tobacco sheets with a thickness of about 0.1 mm. After drying, the sheets are cut into individual reconstituted tobacco shreds with an average length and width of about 2 mm and 0.45 mm, respectively.

[0067] Comparative Example 3

[0068] Ordinary tobacco leaves with a thickness of about 0.1 mm are cut into loose filaments with an average length and width of about 10 mm and 3 mm, respectively. An aerosol forming agent is sprayed onto the surface of the tobacco filaments to make them adhere to the surface of the tobacco filaments, thus obtaining filamentous aerosol forming substrate strips containing the aerosol forming agent.

[0069] Comparative Example 4

[0070] Ordinary tobacco leaves with a thickness of about 0.1 mm are cut into loose filaments with an average length of about 1 mm and a width of about 0.5 mm. An aerosol forming agent is sprayed onto the surface of the tobacco filaments to make them adhere to the surface of the tobacco filaments, thus obtaining filamentous aerosol forming substrate strips containing the aerosol forming agent.

[0071] Take 285mg of each of the aerosol-forming substrates from Example 1 and Comparative Examples 1-2, fill them along the axial direction of the aerosol-generated article, and then roll them into the corresponding wrapping paper to form a smoke-generating section. The length l of the smoke-generating section is 13mm, and the cross-sectional area S is 40.69mm². 2 The smoke-generating section is combined with the first cooling section, the second cooling section, and the filter section to form a structure as follows: Figure 1 or Figure 2 The aerosol-generated articles shown are used to obtain Application Example 1 and Comparative Examples 1-2.

[0072] Take 120 mg of the aerosol forming substrate from Comparative Example 3, 400 mg of the aerosol forming substrate from Comparative Example 4, and 265 mg of the aerosol forming substrate from Example 2. Fill these substrates along the axial direction of the aerosol-generated article and then roll them into the corresponding wrapping paper to form a smoke-generating section with a length l of 42 mm and a cross-sectional area S of 22.89 mm². 2 and it is combined with the first cooling section, the second cooling section and the filter section to form a structure as follows: Figure 1 or Figure 2 The aerosol-generated articles shown are used to obtain Application Example 3 and Comparative Examples 3-4.

[0073] Calculate the interfacial area density and flow resistance coefficient in Application Examples 1-2 and Comparative Examples 1-4. When measuring the flow resistance coefficient, Q = 17.5 mL / s and μ = 1.8 × 10⁻⁶. -5 Pa·s. (It should be noted that for aerosol forming substrates with through holes, the diameter of the through holes is too small and therefore negligible. That is, when calculating the sum of the outer surface areas A of the aerosol forming substrates, the area of ​​the through holes themselves does not need to be considered.) The calculated volume of the smoke-generating section, the density of a single aerosol forming substrate, the interfacial area density A / V, and the flow resistance coefficient R are recorded in Table 1. Then, according to the method provided by ISO 6565:2002, the aerosol-generating articles in the corresponding use cases and application comparison examples are pumped and the pumping resistance is measured. The measured pumping resistance data are recorded in Table 1.

[0074] Meanwhile, for Application Example 1, the aerosol generating product from Comparative Examples 1-2 was used, equipped with a heated aerosol generating device matching the specifications of the smoke-generating section, and heated to maintain a consistent heating mode: for example, from the start of heating to the 7th second, the heating temperature linearly increased from room temperature to 380℃; from the 7th to the 15th second, the heating temperature remained at 380℃; from the 15th to the 17th second, the heating temperature linearly increased to 410℃; from the 17th to the 30th second, the heating temperature remained at 410℃; from the 30th to the 32nd second, the heating temperature linearly decreased to 390℃; from the 32nd to the 58th second, the heating temperature remained at 390℃; from the 58th to the 60th second, the heating temperature remained at 370℃; and from the 60th to the 110th second, the heating temperature linearly decreased to 360℃. At 0℃, the heating temperature is maintained at 360℃ from the 120s to the end of all aspiration stages, and the aspiration pattern remains the same: the first aspiration is taken in the Canadian deep aspiration pattern from 15 to 17s after the start of heating, the second aspiration is taken in the Canadian deep aspiration pattern from 45 to 47s, the third aspiration is taken in the Canadian deep aspiration pattern from 75 to 77s, the fourth aspiration is taken in the Canadian deep aspiration pattern from 105 to 107s, the fourth aspiration is taken in the Canadian deep aspiration pattern from 135 to 137s, the fifth aspiration is taken in the Canadian deep aspiration pattern from 165 to 167s, the seventh aspiration is taken in the Canadian deep aspiration pattern from 195 to 197s, and the eighth aspiration is taken in the Canadian deep aspiration pattern from 225 to 227s. A Cambridge filter is used to capture aerosols at the filter tip of the aerosol-generating product. For Application Example 2, the aerosol generating product from Comparative Examples 3-4 was used, equipped with a heated aerosol generating device matching the specifications of the smoke-generating section, and heated to maintain a consistent heating mode: from the start of heating to 20 seconds, the heating temperature linearly increased from room temperature to 290°C; from 20 to 30 seconds, the heating temperature remained at 290°C; from 30 to 100 seconds, the heating temperature linearly decreased to 235°C; and from 100 seconds until the end of all suction, the heating temperature remained at 235°C, maintaining the same suction mode: from 30 to 32 seconds after the start of heating, a Canadian-made aerosol generating device was used. The aerosol generation process involves a first deep suction mode, a second deep suction mode (using the Canadian deep suction mode) between 60 and 62 seconds, a third deep suction mode (using the Canadian deep suction mode) between 90 and 92 seconds, a fourth deep suction mode (using the Canadian deep suction mode) between 120 and 122 seconds, a fifth deep suction mode (using the Canadian deep suction mode) between 150 and 152 seconds, a fifth deep suction mode (using the Canadian deep suction mode) between 180 and 182 seconds, and a seventh deep suction mode (using the Canadian deep suction mode) between 210 and 212 seconds. A Cambridge filter is used to capture the aerosol at the filter tip of the aerosol generation product.The measured aerosol capture results are also recorded in Table 1.

[0075] Next, users inhaled the aerosol-generated products corresponding to use cases 1-2 and application comparison examples 1-4 and conducted sensory evaluations. The heated cigarette evaluation consisted of four indicators: smoke volume, draw resistance, strength, and irritation. Each indicator was scored from 1 to 9 points based on strength, intensity, and size. The closer an indicator was to the user's comfort zone, the higher the score. The evaluation results were recorded in Table 2. Among them, a higher smoke volume score indicates a greater amount of smoke released.

[0076] Table 1

[0077]

[0078] Table 2

[0079] Aerosol generating article origin Amount of smoke Draw resistance Strength Irritation Total score Application Example 1 8 9 7 8 32 Application Example 2 9 7 8 7 31 Application Comparative Example 1 5 7 4 7 23 Application Comparative Example 2 6 5 6 5 22 Application Comparative Example 3 4 5 3 6 18 Application Comparative Example 4 3 3 4 4 14

[0080] As can be seen from Tables 1 and 2, the interfacial area density of the smoke-generating section in Application Examples 1-2 is limited to 3000 m² in this application. ﹣1 <A / V<10000m ﹣1 Within this range, the flow resistance coefficient R of the smoke-generating section is also within the 5×10 range specified in this application. 8 m ﹣2 <R<1×10 10 m ﹣2 Within this range, a higher aerosol release was achieved. Users experienced suitable suction resistance, sufficient strength, and minimal irritation during inhalation, resulting in an overall superior inhalation experience compared to Comparative Examples 1-4. Specifically, for Application Example 1 and Comparative Examples 1-2, with the same filler volume, Application Example 1 captured less aerosol than Comparative Example 2, but ultimately released more smoke during inhalation than Comparative Examples 1-4. This is because the interfacial area density of the smoke-generating section in Application Example 1 is within the 3000 m³ limit specified in this application. ﹣1 <A / V<10000m ﹣1 Within this range, the flow resistance coefficient R of the smoke-generating section is also within the 5×10 range specified in this application. 8 m ﹣2 <R<1×10 10 m ﹣2 Within this range, by dividing individual aerosol substrates into finer segments, the contact area between the aerosol matrix and the gas is increased, promoting convective mass transfer and thus increasing the aerosol release. This results in high aerosol substrate utilization and a larger volume of mist produced within this range. Furthermore, by controlling the flow resistance coefficient R of the smoke-generating section within the aforementioned range, appropriate suction resistance, sufficient power, and low irritation are achieved during inhalation, improving the user's inhalation experience.

[0081] Comparative Examples 1-4 have interfacial area densities in the smoke-generating sections that are not within the 3000 m³ limit specified in this application. ﹣1 Within the range of A / V < 10000, the flow resistance coefficient R of the smoke-generating section is also not limited to 5 × 10⁻⁶ as specified in this application. 8 m ﹣2 <R<1×10 10 m ﹣2 Ultimately, this manifests as low aerosol release or excessive suction resistance, insufficient force, and strong irritation, resulting in a poorer overall suction experience compared to Application Examples 1-2.

[0082] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. An aerosol-generating product, characterized in that, include: The smoke-generating section includes an aerosol-forming substrate, which generates aerosols for user inhalation under heating. The sum of the outer surface areas of the aerosol-forming substrate is A, the volume of the smoke-generating section is V, and the interfacial area density A / V of the smoke-generating section satisfies 3000 m² / g. ﹣1 <A / V<10000m ﹣1 The length of the smoke-generating section is l, the cross-sectional area of ​​the smoke-generating section is S, the dynamic viscosity of the air is μ, the volumetric flow rate of the air flowing through the smoke-generating section is Q, the pressure drop through the smoke-generating section of length l is ΔP, and the flow resistance coefficient of the smoke-generating section is... R satisfies: 5 × 10 8 m ﹣2 <R<1×10 10 m ﹣2 .

2. The aerosol-generating product as described in claim 1, characterized in that, The outer surface area of ​​a single aerosol forming substrate is denoted as 'a', where 'a' satisfies: 0.5 mm². 2 <a<45mm 2 .

3. The aerosol-generating product as described in claim 1, characterized in that, The aerosol forming substrate is in the form of a strip.

4. The aerosol-generating product as described in claim 3, characterized in that, The elongated aerosol forming substrate has a length and a width, wherein the length is in the range of 1 to 40 mm and the ratio of the length to the width is in the range of 1 to 80.

5. The aerosol-generating product as described in claim 1, characterized in that, Part or all of the aerosol forming substrate is arranged along the axial direction of the aerosol-generated article.

6. The aerosol-generating article as described in claim 5, characterized in that, The number of aerosol-forming substrates arranged along the axial direction of the aerosol-generating article is n1, and the total number of aerosol-forming substrates in the aerosol-generating article is n2, wherein n1 / n2≥80%.

7. The aerosol-generating article as described in claim 1, characterized in that, The aerosol forming substrate includes a through hole extending along the thickness direction of the aerosol forming substrate.

8. The aerosol-generating article as described in claim 7, characterized in that, The equivalent diameter of the through hole is d, which is the diameter of a circle with the same area as the through hole. The width of the aerosol forming substrate in which the through hole is located is w, where 0 < d / w ≤ 30%.

9. The aerosol-generating article as described in claim 7 or 8, characterized in that, There are multiple through holes, the sum of the areas of the multiple through holes is x, and the area of ​​the aerosol forming substrate where the through holes are located is y, where 0 < x / y ≤ 10%.

10. The aerosol-generating article as described in claim 1, characterized in that, 4000m ﹣1 <A / V<9000m ﹣1 ,8×10 8 m ﹣2 <R<8×10 9 m ﹣2 。 11. The aerosol-generating article as described in claim 1, characterized in that, The aerosol forming substrate includes an aerosol forming agent, and the mass ratio of the aerosol forming agent to the mass of the aerosol forming substrate is 5% to 25%.

12. The aerosol-generating article as described in claim 1, characterized in that, 11mm≤l≤45mm.

13. The aerosol-generating article as described in claim 1, characterized in that, The aerosol forming substrate is reconstituted tobacco.

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