Aerosol-generating article for restricting gas flow

Abstract

Disclosed in the present application is an aerosol-generating article, comprising an aerosol-forming substrate adapted to generate an inhalable aerosol when an aerosol delivery device is heated. The aerosol-generating article further comprises a plurality of components, wherein the plurality of components are assembled in a tube formed by a wrapper, so as to form a rod-shaped member, and the rod-shaped member comprises a mouthpiece end located downstream of the aerosol-forming substrate and a distal end located upstream of the mouthpiece end. The aerosol-generating article is characterized in that a restricting element is provided upstream of the aerosol-forming substrate, the restricting element is connected to the wrapper for increasing the draw resistance upstream of the aerosol-forming substrate, the restricting element comprises a connector connected to the wrapper and a blocking member connected to the connector, and the minimum distance between the blocking member and the aerosol-forming substrate is less than or equal to 7 mm. By means of the provision of the restricting element, the present application can provide the desired ventilation and draw resistance, and also can avoid contamination.

Description

An aerosol generating product that restricts gas flow

[0001] This application claims priority to Chinese Patent Application No. 202510021901.7, filed on January 7, 2025, entitled "An Aerosol Generating Article for Restricting Gas Flow", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of heat-not-burning technology, and more particularly to an aerosol-generating product. Background Technology

[0003] In the field of heated tobacco products, the aerosol-forming matrix section of aerosol-generating products typically appears brownish-gray before inhalation. After inhalation, due to heating, the aerosol-forming matrix section undergoes oxidation and thermal decomposition, resulting in carbonization of organic materials such as cellulose and lignin, further darkening its color to brownish-black or black. Simultaneously, due to the high temperature of the aerosol-forming matrix section, the hot aerosol exhibits strong Brownian motion and escapes through the permeable parts of the aerosol-generating product, remaining inside the aerosol delivery device. Over time, this leads to severe odor residue inside the aerosol delivery device. Although some designs incorporate filters upstream of the aerosol-forming matrix section, the draw resistance and air intake design requirements of the aerosol-generating product necessitate that these filters be made of porous materials. While these designs achieve some odor reduction and cleanliness, they do not fundamentally solve the problem of odor residue after long-term use of the aerosol delivery device. Long-term studies of smokers have revealed that odor residue in aerosol delivery devices is not solely caused by aerosols escaping along the axial direction of the aerosol-generating product; aerosols can also escape laterally. Therefore, designing a system that includes a laterally encapsulating section for the aerosol-forming matrix may be beneficial in addressing the odor residue problem.

[0004] However, the above methods still cannot effectively solve the problem of odor residue. Further experiments revealed that the root cause of the odor residue problem is that the upstream aerosol was not effectively treated when using aerosol-generated products. At the same time, consumers are affected by complex factors such as the type of aerosol delivery device, the structure of the aerosol-generated product, and consumers' inhalation habits when using aerosol-generated products, which leads to the problem of aerosol attenuation.

[0005] Application content

[0006] This application provides an aerosol generating article for restricting gas flow, comprising an aerosol forming matrix suitable for generating inhalable aerosols when heated by an aerosol delivery device. The aerosol generating article further includes multiple components assembled within a tube formed by a package to form a rod-like member. The rod-like member includes a mouthpiece downstream of the aerosol forming matrix and a distal end upstream of the mouthpiece. A limiting element is provided upstream of the aerosol forming matrix, the limiting element being connected to the package to increase the inhalation resistance upstream of the aerosol forming matrix. The limiting element includes a connector connected to the package and a blocking member connected to the connector. The minimum distance between the blocking member and the aerosol forming matrix is ​​less than or equal to 7 mm.

[0007] As a preferred embodiment, a longitudinal cavity is provided between the barrier and the aerosol forming matrix, the volume of which is less than or equal to the volume of a flow channel formed by the upstream packaged material 2 of the aerosol forming matrix.

[0008] As a preferred embodiment, the connector includes an outer wrapping portion attached to the outer periphery of the packaging, the outer wrapping portion extending to the outer periphery of the aerosol forming matrix.

[0009] As a preferred embodiment, the connector further includes a bend around the end face of the tube formed by the packaging, and the blocking member is connected to the bend and is at least partially located within the tube formed by the packaging.

[0010] As a preferred embodiment, the connector further includes an inner support portion connected to the blocking member, the inner support portion being housed within the tube formed by the packaging.

[0011] As a preferred embodiment, the connector further includes an outer wrapping portion connected to the inner support portion, with a gap formed between the inner support portion and the outer wrapping portion, and the distal end of the package being at least partially embedded in the gap.

[0012] As a preferred embodiment, the blocking member protrudes and / or is recessed toward the aerosol forming matrix.

[0013] As a preferred embodiment, the blocking element has one or more ventilation holes, and the blocking element has a drawdown resistance (RTD) of less than 70 mm H2O.

[0014] As a preferred embodiment, the air permeability of the barrier is greater than or equal to 100 μm·Pa. -1 ·s -1 .

[0015] As a preferred embodiment, the polar moment of inertia of the blocking element is less than 500 mm. 4 .

[0016] The beneficial effects of this application are as follows: On the one hand, by setting the distance between the limiting element and the aerosol-forming matrix, the permeability of gas passing through the aerosol-generating product is restricted, increasing the suction resistance in the upstream region of the aerosol-forming matrix to provide the desired ventilation and suction resistance. During the negative pressure formed by the consumer's inhalation, external airflow flows into the limiting element, but during the inhalation interval, the limiting element restricts the escape of aerosol. The restricted aerosol can compensate for the aerosol concentration and reduce aerosol contamination of the aerosol delivery device. On the other hand, the connecting part of the limiting element can extend to the outside of the aerosol-generating product and contact the inside of the aerosol delivery device, thereby achieving the effect of reducing the temperature of the aerosol at the distal end, reducing the average kinetic energy of gas molecules, and further reducing the escape of aerosol. The blocking part of the limiting element can be designed with different polar moments of inertia to affect the airflow density distribution at different positions in the limiting element, so as to adapt to aerosol delivery devices with different heating mechanisms such as the center and circumference and promote the thermal decomposition process of the aerosol-forming matrix, thereby achieving the purpose of effectively releasing nicotine. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the aerosol-generated article of Comparative Example 1 in this application;

[0019] Figure 2 is a schematic diagram of the aerosol-generated article of Embodiment 1 in this application;

[0020] Figure 3 is a schematic diagram of the aerosol-generated article of Embodiment 2 in this application;

[0021] Figure 4 is a schematic diagram of the aerosol-generated article of Example 3 in this application;

[0022] Figure 5 is a schematic diagram of the aerosol-generated article of Example 4 in this application;

[0023] Figure 6 is a schematic diagram of the aerosol-generated article of Example 5 in this application;

[0024] Figure 7 is a schematic diagram of the aerosol-generated article of Example 6 in this application;

[0025] Figure 8 is a schematic diagram of the aerosol-generated article of Example 7 in this application;

[0026] Figure 9 is a schematic diagram of the aerosol-generated article of Example 8 in this application;

[0027] Figure 10 is a schematic diagram of the aerosol-generated article of Example 9 in this application;

[0028] Figure 11 is a schematic diagram of the aerosol-generated article of Example 10 in this application;

[0029] Figure 12 is a schematic diagram of the aerosol-generated article of Example 11 in this application;

[0030] Figure 13 is a schematic diagram of the aerosol-generated article of Example Twelve in this application;

[0031] Figure 14 is a schematic diagram of the aerosol-generated article of Comparative Example 2 in this application;

[0032] Figure 15 is a schematic diagram of the aerosol-generated article of Example 13 in this application;

[0033] Figure 16 is a schematic diagram of the aerosol-generated article of Example Fourteen in this application;

[0034] Figure 17 is a schematic diagram of the aerosol-generated article of Example 15 in this application;

[0035] Figure 18 is a schematic diagram of the aerosol-generated article of Example Sixteen in this application;

[0036] Figure 19 is a schematic diagram of the aerosol-generated article of Example 17 in this application;

[0037] Figure 20 is a schematic diagram of the aerosol-generated article of Example 18 in this application;

[0038] Figure 21 is a schematic diagram of the blocking element of the aerosol generation article in this application;

[0039] Figure 22 is a schematic diagram of an aerosol-generated article according to an embodiment of this application;

[0040] Figure 23 is a graph showing the amount of smoke in Examples 1 to 12 and Comparative Example 1 of this application;

[0041] Figure 24 is a graph showing the amount of smoke in Examples 13 to 18 and Comparative Example 2 of this application. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] Please refer to Figures 1 to 22. This application provides an aerosol generating article that restricts gas flow, including an aerosol forming matrix 1 suitable for generating inhalable aerosols when heated by an aerosol delivery device. The aerosol generating article also includes multiple components, which are assembled into a tube formed by a packaging 2 to form a rod-shaped member. The rod-shaped member includes a nozzle end 3 located downstream of the aerosol forming matrix 1 and a distal end 4 located upstream of the nozzle end 3.

[0044] Specifically, in this embodiment of the application, the aerosol forming matrix 1 and multiple components are enclosed within a packaging material 2, so that the aerosol-generated article is in the form of a rod. The aforementioned multiple components include, but are not limited to, a filter section 10, a cooling section 9, a support section, a functional section, and an integral element formed by combinations thereof. The functional section includes, but is not limited to, functions of cooling, filtering, and support, and may also have functions such as aroma release and replenishment.

[0045] Specifically, the packaging 2 in this embodiment has a distal end 4 upstream of the mouthpiece end 3, a proximal end downstream of the mouthpiece end 3, and a tubular packaging 2 body located between the distal end 4 and the proximal end. The aerosol forming matrix 1 is located inside the packaging 2 near the distal end 4, and the filter section is located inside the packaging 2 near the proximal end. The components can be arranged inside the packaging 2 according to actual needs. The packaging refers to a tubular body capable of housing multiple components. A typical material for the packaging is cellulose paper. Based on the different basis weights and tensile strengths of cellulose paper, the packaging can accommodate multiple components in ways including but not limited to rolling, canning, and twisting. Optionally, the main components of the packaging material include one or more of wood pulp fiber, straw pulp fiber, cotton fiber, hemp fiber, regenerated fiber, and bamboo fiber. In some embodiments, the packaging includes fillers, adhesives, and wet strength agents to ensure the mechanical strength of the aerosol-generated product. In some embodiments, the packaging may also be made from natural plant leaves, tobacco leaves, artificially regenerated leaves, etc.

[0046] Understandably, the aerosol-forming matrix 1 can be tobacco sheets, shredded tobacco, stems, expanded tobacco, expanded stems, or tobacco particles. It is characterized by containing smoky substances such as glycerol and propylene glycol, as well as addictive substances such as nicotine and cannabis-like substances. Flavorings and fragrances may also be added. The mechanism of aerosol formation is that when the aerosol-forming matrix 1 is heated, volatile smoky substances, addictive substances, and flavoring substances are released to form vapor. This vapor is then cooled during inhalation. Due to a nucleation mechanism, the vapor condenses to form droplets. When the temperature is low enough, the number of droplets is sufficient, and they coalesce to form large-diameter aerosol droplets. The cooling section not only lowers the flue gas temperature to support the cooling of volatile substances from the upstream aerosol-forming matrix 1 to form aerosols, but also supports the aerosol-generated product. Downstream of the cooling section, there is a filter section that comes into contact with the mouth to support lung inhalation and also filters harmful substances. The filter section is often made of fiber bundles, and the dense fiber bundles can effectively trap harmful substances in the flue gas.

[0047] Furthermore, in this embodiment of the application, a limiting element 5 is provided upstream of the aerosol forming matrix 1. The limiting element 5 is connected to the packaging 2 to increase the inhalation resistance upstream of the aerosol forming matrix 1. The limiting element 5 includes a connector 51 connected to the packaging 2 and a blocking member 52 connected to the connector 51. The minimum distance between the blocking member 52 and the aerosol forming matrix 1 is less than or equal to 7 mm.

[0048] Specifically, the material thickness of the limiting element 5 is 0.05–3.5 mm, avoiding the situation where it is too thin to provide sufficient limiting effect, while avoiding the situation where it is too thick to provide excessive limiting effect, thus affecting ventilation and suction resistance. The limiting element 5 can be configured as a membrane, sheet, plate, thin material, or a combination of two or more of these. It is understood that there are no restrictions on the form and combination of the limiting element 5 described above, and it can be matched according to actual needs, such as layered stacking, where the number of layers can be set according to actual needs, such as a combination of membrane and plate.

[0049] In addition, the aerosol generating article of this application embodiment also includes a receptor 11 filled in the aerosol forming matrix 1. It should be understood that the position, form, and number of the receptor 11 filled in the matrix are not limited. Specifically, the receptor 11 is strip-shaped and arranged parallel to the longitudinal axis in the matrix. The length of the receptor 11 and the aerosol forming matrix 1 in the longitudinal axis direction are equal. The receptor 11 has a thickness of 0.03-0.18 mm, a width of 1.5-4.5 mm, and a length of 9-18 mm. The ratio of the length of the receptor 11 to the total length of the aerosol generating article is between 0.20 and 0.45. The receptor is a ferromagnetic alloy containing iron, nickel, and cobalt. In some embodiments, the receptor 11 may be composed of a soft magnetic alloy or two or more alloys containing iron, nickel, and cobalt. Preferably, the material of the receptor 11 is a homogeneous soft magnetic alloy. The sensor 11 possesses excellent electromagnetic properties, enabling it to utilize electrical energy from an external circuit based on the principle of wireless power transfer, and to heat the aerosol-forming matrix based on the principle of electromagnetic induction heating. The Curie temperature of the sensor 11 is between 300 and 400°C. When the Curie temperature of the sensor 11 exceeds 400°C, the aerosol-generated product is at risk of heat loss and combustion. This is because the sensor 11 undergoes a ferromagnetic-paramagnetic transition near the Curie temperature, resulting in a significant reduction in magnetism, which causes the aerosol transfer device to stop heating.

[0050] Furthermore, in this embodiment of the application, the blocking member 52 has a longitudinal cavity 6 between it and the aerosol forming matrix 1, the volume of which is less than or equal to the volume of a flow channel 12 formed by the upstream packaged material 2 of the aerosol forming matrix 1.

[0051] Understandably, the maximum equivalent diameter of the cross-section of the blocking member 52 is less than or equal to the inner diameter of the rod-shaped structure formed by the packaging 2. In some embodiments, the upstream end face of the packaging 2 is flush with the upstream end face of the aerosol forming matrix 1, together constituting the distal end 4 of the aerosol generating article. In other embodiments, the upstream portion of the packaging 2 extends axially and beyond the upstream end face of the aerosol forming matrix 1, such that the distal end 4 of the packaging 2 constitutes the end of the aerosol generating article. If the distal end 4 of the packaging 2 constitutes the end of the aerosol generating article, then the space between the extended portions of the packaging 2 forms a flow channel, in which case the distal end 4 of the packaging 2 is the distal end 4 of the aerosol generating article.

[0052] Understandably, in this embodiment, the minimum distance between the blocking member 52 and the aerosol forming matrix 1 is less than or equal to 7 mm. When the minimum distance between the blocking member 52 and the aerosol forming matrix 1 is 0 mm, the blocking member 52 contacts the aerosol forming matrix 1. When the minimum distance between the blocking member 52 and the aerosol forming matrix 1 is greater than 0 mm and less than or equal to 7 mm, the blocking member 52 is located within the flow channel, and there is a gap between the blocking member 52 and the aerosol forming matrix 1 to form a longitudinal cavity 6. When the blocking member 52 is located at the position furthest from the aerosol forming matrix 1, the volume of the longitudinal cavity 6 between the blocking member 52 and the aerosol forming matrix 1 is equal to the volume of the flow channel 12.

[0053] When the aerosol generating article of this application is used inside an aerosol delivery device, after the consumer inhales through the near-end filter section, a negative pressure is generated inside, allowing external gas to be filled into the aerosol generating article through the limiting element 5 at the far end 4. Furthermore, the longitudinal cavity 6 serves to store gas, ensuring that the gas carried away with each inhalation is promptly filled and replenished. It should be understood that while the limiting element 5 increases the inhalation resistance in the upstream region of the aerosol forming matrix 1, the limiting element 5 also possesses suitable permeability.

[0054] Understandably, since the heating process of the aerosol-generating product by the aerosol transfer device is continuous, the aerosol-forming matrix 1 of the aerosol-generating product will be continuously heated to generate aerosols. However, the consumer's suction action is intermittent. Therefore, during the suction intervals, the hot aerosol will diffuse irregularly to the surroundings. After the previous suction action is completed, a negative pressure is created in the longitudinal cavity 6, and external gas fills the longitudinal cavity 6. The hot aerosol diffused into the longitudinal cavity 6 will mix with the filling gas, awaiting the next suction action.

[0055] During the above process, the thermal aerosol exchanges heat with the incoming gas. On one hand, the temperature of the thermal aerosol is lowered, thereby reducing the Brownian motion of the aerosol molecules and decreasing the likelihood of the aerosol overflowing through the limiting element 5. Combined with the limiting element 5, this allows for the storage of a larger amount of aerosol within the longitudinal cavity 6. The aerosol stored in the longitudinal cavity 6 can mix with the newly generated thermal aerosol during the next consumer inhalation, compensating for the aerosol concentration and satisfying the consumer's requirement for consistent taste throughout the entire inhalation process. On the other hand, lowering the temperature within the longitudinal cavity 6 reduces the end temperature of the aerosol-generating product, preventing the outer packaging 2 from burning due to high temperatures and further reducing the possibility of thermal aerosol overflow.

[0056] As shown in Figures 1 to 5, and in conjunction with Figure 22, the maximum equivalent diameter of the cross-section of the blocking member 52 in this embodiment is less than or equal to the inner diameter of the rod-shaped structure formed by the packaging 2.

[0057] Specifically, the blocking member 52 may be arranged horizontally and / or curvedly within the packaging 2, and by limiting the maximum equivalent diameter of the cross-section of the blocking member 52, the blocking member 52 may be directly surrounded by the packaging 2, or the blocking member 52 may be directly connected to the distal end 4.

[0058] Please refer to Figures 6 to 13. Based on the above embodiments, the connector 51 of this application embodiment includes an outer wrapping portion 512 attached to the outer periphery of the packaging 2, and the outer wrapping portion 512 extends to the outer periphery of the aerosol forming matrix 1.

[0059] Understandably, the outer wrapping portion 512 is used to connect the blocking member 52 to the packaging 2, thereby fixing the blocking member 52 and further improving the strength of the distal end 4 of the aerosol-generating article. Furthermore, since the outer wrapping portion 512 is located outside the aerosol-generating article, when the aerosol-generating article is inserted into the aerosol delivery device, the outer wrapping portion 512 contacts the aerosol delivery device, reducing the possibility of circumferential diffusion of the aerosol while simultaneously lowering the temperature of the aerosol at the distal end 4, reducing the average kinetic energy of the aerosol molecules, and further minimizing aerosol escape. The connection methods between the outer wrapping portion 512 and the packaging 2 include, but are not limited to, vacuum bonding, mechanical force, van der Waals forces, hydrogen bonding, and adhesive bonding.

[0060] In some embodiments of this application, the outer wrapping portion 512 may also extend to the outer periphery of other components of the aerosol-generating article.

[0061] Please refer to Figure 22. Based on the above embodiments, the connector 51 of this application embodiment further includes an inner support portion 516 connected to the blocking member 52. The inner support portion 516 is housed in the tube formed by the packaging 2.

[0062] Specifically, the blocking member 52 is fixed by connecting the inner support part 516 to the packaging 2. The connection methods between the inner support part 516 and the packaging 2 include, but are not limited to, vacuum bonding, mechanical force, van der Waals force, hydrogen bond, and adhesive bonding.

[0063] In some embodiments, the blocking member 52 is fixed by the combination of the inner support portion 516 and the outer wrapping portion 512. In this embodiment, a gap 7 is formed between the inner support portion 516 and the outer wrapping portion 512, and the distal end 4 of the packaging 2 is at least partially embedded in the gap 7, so that the limiting element 5 can be directly fixed in the gap 7 by the distal end 4 of the packaging 2, thereby achieving the purpose of fixation.

[0064] Please refer to Figure 22. Based on the above embodiments, the connector 51 of this application embodiment further includes a bent portion 514 that surrounds the end face of the tube formed by the packaging 2. The blocking member 52 is connected to the bent portion 514 and is at least partially located within the tube formed by the packaging 2.

[0065] In some embodiments, the blocking member 52 is directly fixed to at least the portion of the bend 514 located within the packaging 2 via the bend 514. In other embodiments, the bend 514 is at least partially located on the outer periphery of the packaging 2, and the blocking member 52 is fixed by the bend 514 and the outer wrapping portion 512. In other embodiments, the blocking member 52 is connected to an inner support portion 516, which is connected to at least the portion of the bend 514 located within the packaging 2, and is fixed by the bend 514 and the inner support portion 516. In other embodiments, the blocking member 52 is fixed by the cooperation of the bend 514, the outer wrapping portion 512, and the inner support portion 516, with the blocking member 52 connected to the inner support portion 516, the inner support portion 516 connected to at least the portion of the bend 514 located within the packaging 2, and the outer wrapping portion 512 connected to at least the portion of the bend 514 located on the outer periphery of the packaging 2. The bend 514 increases the reliability of the connection between the connecting member 51 and the packaging 2.

[0066] It should be noted that, for the convenience of understanding the technical solution, there is a gap between the limiting element 5 and the packaging 2 in the accompanying drawings of this application. This is for the purpose of explaining the structure. In the actual product, they are attached together. The gap in the drawings will not affect the understanding of the technical solution by those skilled in the art.

[0067] Furthermore, the blocking member 52 in this embodiment of the application has one or more ventilation holes 8, and the blocking member 52 has a suction resistance of less than 70 mm of suction resistance (RTD) H2O.

[0068] It should be understood that the size, shape, number, and distribution of the ventilation holes 8 are not limited, as long as their suction resistance is less than 70 mm RTD H2O. In this embodiment, by providing ventilation holes 8 on the blocking member 52, the total suction resistance of the aerosol-generating product can be controlled, thereby achieving the desired suction resistance and ventilation effect. Specifically, the shape of the ventilation holes 8 includes, but is not limited to, any shape such as circular, rhomboid, or polygonal. The ventilation holes 8 can be achieved through laser perforation, electron beam drilling, mechanical drilling, or other methods.

[0069] Furthermore, in this embodiment, the air permeability of the blocking member 52 of the limiting element 5 is greater than or equal to 100 μm·Pa. -1 ·s -1 .

[0070] Specifically, the air permeability of the blocking member 52 of the limiting element 5 is ≥100 μm·Pa. -1 ·s-1 By limiting the permeability of the blocking element 52, gas can continuously flow in from the upstream of the aerosol forming matrix 1. In some embodiments, the connector 51 of the limiting element 5 also satisfies the above-mentioned permeability and suction resistance.

[0071] Furthermore, in this embodiment of the application, the blocking member 52 protrudes and / or is recessed in the direction toward the aerosol forming matrix 1.

[0072] Understandably, in the two shapes of the obstruction 52, namely protruding and recessed, according to the gas flow continuity equation based on the law of mass conservation, due to the difference in the shape design of the obstruction 52, local airflow density differences will occur when the gas flows through the obstruction 52. In the design of the protruding obstruction 52, the airflow density at its center is smaller, while the airflow density in the circumferential direction is larger; while in the design of the recessed obstruction 52, the airflow density at its center is larger, while the airflow density in the circumferential direction is smaller. Since the thermal decomposition process of the aerosol forming matrix 1 is an oxidation reaction, having a greater airflow density at the location of the aerosol forming matrix 1 at a higher temperature will be beneficial to its thermal decomposition process and release more nicotine.

[0073] Specifically, the cross-sectional shape of the protrusions or recesses of the blocking member 52 can be U-shaped, V-shaped, or wavy. The number of protrusions or recesses can be one or more, and multiple protrusions or recesses are spaced apart along the radial direction of the packaging 2. By providing protrusions or recesses on the blocking member 52, the direction of airflow is directed and the airflow velocity is increased.

[0074] Understandably, when the obstruction 52 is a non-flat surface, such as curved surfaces, conical surfaces, pyramidal surfaces, cylindrical surfaces, prismatic surfaces, frustum surfaces, etc., the number and location of non-flat protrusions or depressions have a significant impact on the airflow velocity distribution. The airflow velocity within the aerosol-generating product increases with the contraction of the airflow cross-section and decreases with the expansion of the cross-section. With the same total airflow inflow, but different obstruction 52 designs, the different local acceleration positions of the obstruction 52 will cause the airflow during the suction process to vary with the planar structure of the obstruction 52. The formation of positional differences results in localized areas with large and small airflow inflows. Since the localized areas with large airflow inflows are achieved through an acceleration mechanism, they do not generate negative pressure during the suction interval as they do during the suction process. Therefore, the blocking element 52 has the function of restricting the outflow of the inflowing aerosol. Furthermore, when the material of the blocking element 52 has a high thermal conductivity, such as metal or carbon, it exchanges heat with the inflowing aerosol and effectively cools it down, further reducing its molecular kinetic energy and thus reducing aerosol overflow.

[0075] Specifically, the polar moment of inertia of the blocking member 52 of the limiting element 5 is less than 500 mm. 4The barrier 52 forms protrusions and / or depressions within the packaging 2 facing the aerosol forming matrix 1, and the polar moment of inertia of the barrier 52 also changes accordingly. By limiting the polar moment of inertia and air permeability of the barrier 52, the shape and material of the barrier 52 within the packaging 2 are defined to ensure air inflow while directionally guiding the airflow and increasing the airflow velocity.

[0076] The air permeability test standard for the blocking member 52 in this application embodiment refers to GB / T 22901-2008. The air permeability test instrument can be Sheffield, Gurley, or equipment with component improvements based on the test principles of the first two instruments. Depending on the accuracy and principle of the test element used in the air permeability test instrument, the accuracy and repeatability of the test results are allowed to fluctuate within 5%.

[0077] The air permeability calculation formula based on the GB / T22901-2008 standard is as follows;

[0078] In the above formula:

[0079] V represents the volume of air passing through the test area, in mL; S represents the area of ​​the test area, in m². 2 Δp is the pressure difference, in kPa; t is the test duration, in seconds.

[0080] Under the aforementioned air permeability limitation of the blocking element 52, the blocking element 52 shall further have a suction resistance (RTD) of no more than 70 mm water column; the suction resistance test standard for the blocking element 52 refers to GB / T 18767-2002.

[0081] The moment of inertia of the section of the blocking member 52 is determined by the geometry, spatial position, and reference axis of the blocking member 52, and its calculation formula is as follows:

[0082] In the above formula, the moment of inertia I of the cross section is a combination of the polar moment of inertia and the adjustment terms of the parallel axis theorem. When the reference axis is the central axis, the value of d in the above formula is 0. At this time, the moment of inertia I of the cross section is called the polar moment of inertia I. A is the area of ​​the thin material cross section, and y is the perpendicular distance between the integral element dA of area A and the central axis.

[0083] Considering the shape characteristics of the aerosol-generating product strip, the reference axis of the moment of inertia of the section of the blocking member 52 is defined as the central axis of the aerosol-generating product. Regardless of the cross-sectional shape of the blocking member 52 or how it is positioned, the value of its polar moment of inertia I should be less than 500 mm. 4Since the polar moment of inertia of the blocking member 52 may change when or after the aerosol generating product is used, the above-mentioned numerical limitation refers to the polar moment of inertia of the blocking member 52 before the aerosol generating product is used.

[0084] In one aspect, by setting the distance between the limiting element 5 and the aerosol forming matrix 1, the permeability of gas passing through the aerosol-generating product is restricted, thereby increasing the suction resistance in the upstream region of the aerosol forming matrix 1 to provide the desired ventilation and suction resistance. During the negative pressure generated by the consumer's inhalation, external airflow flows into the limiting element 5, but during the inhalation interval, the limiting element 5 restricts the escape of aerosol. The restricted aerosol can compensate for the aerosol concentration and reduce aerosol contamination of the aerosol delivery device. On the other hand, the connector 51 of the limiting element 5 can extend to the outside of the aerosol-generating product and contact the heat dissipation medium inside the aerosol delivery device, thereby achieving the effect of reducing the temperature of the aerosol at the distal end 4, reducing the average kinetic energy of the gas molecules, and further reducing the escape of aerosol. The limiting element 5 can be designed with shapes having different polar moments of inertia to affect the airflow density distribution at different positions in the limiting element 5, so as to adapt to aerosol delivery devices with different heating mechanisms such as the center and circumference and promote the thermal decomposition process of the aerosol forming matrix 1, thereby achieving the purpose of effectively releasing nicotine.

[0085] The present application will be further described below through specific embodiments. It should be understood that, for ease of distinction, A0 to A12 and B0 to B6 refer to a single embodiment of the aerosol-generating article, as detailed below:

[0086] Comparative Example 1

[0087] The A0 aerosol generating product has a total length of 45 mm and an outer diameter of 7 mm. The upstream end 4 is provided with a 7 mm flow channel or longitudinal cavity 6. The length of the aerosol forming matrix 1 is 10 mm. The aerosol forming matrix 1 is filled with a thick slurry sheet with a thickness of 0.21 mm and a width of 116 mm. The downstream part of the aerosol forming matrix 1 is successively a 18 mm hollow cavity cooling section and a 10 mm acetate fiber filter element nozzle section with a single denier of 22 denier and a total denier of 35,000 denier. The overall suction resistance of the aerosol generating product is 650 Pa.

[0088] Example 1

[0089] The difference from A0 is that a flat, circular baffle 52 is added to the distal end 4 of the A1 aerosol generating product. The baffle 52 is made of wood pulp cellulose paper, and food-grade silicone is used to bond the wood pulp fiber paper to the interior of the aerosol generating product. The total denier of the acetate fiber filter element nozzle section is 32,000. The basis weight of the wood pulp cellulose paper is 40 g / m³. 2The thickness is 0.05mm, the diameter of the wood pulp cellulose paper is 6.95mm, and the polar moment of inertia of the blocking element 52 is approximately 236mm. 4 It has 18 micropores of 30 micrometers each, with a micropore number density of 0.5 pores / mm. 2 The air permeability of the barrier component 52 is 330 μm·Pa. -1 ·s -1 The overall absorption resistance of the aerosol-generated product strip is 650 Pa.

[0090] Example 2

[0091] The difference between A2 and A1 is that the A2 aerosol generating product has an additional blocking component 52, which is a flat, circular aluminum sheet. This blocking component 52 is secured to the distal end 4 of the aerosol generating product using an interference fit. The total denier of the cellulose acetate filter element's nozzle section is 31,000. The blocking component 52 has a thickness of 0.1 mm, a diameter of 7 mm, and a polar moment of inertia of approximately 236 mm. 4 It has 18 micropores of 55 micrometers each, with a micropore number density of 0.5 pores / mm. 2 The air permeability of the barrier component 52 is 290 μm·Pa. -1 ·s -1 .

[0092] Example 3

[0093] The difference between A3 and A2 is that the A3 aerosol generating product has an additional blocking component 52, which is a convex spherical aluminum shell. This blocking component 52 is secured to the distal end 4 of the aerosol generating product using an interference fit. The total denier of the cellulose acetate filter element nozzle section is 31,500. The blocking component 52 has a thickness of 0.1 mm, an inner diameter of 6.9 mm, an outer diameter of 7.0 mm, and a polar moment of inertia of approximately 153 mm. 4 The spherical shell of the aluminum material has eight 65-micrometer micropores in the head 2 / 3 region and ten 50-micrometer micropores in the lower 1 / 3 region, with a micropore number density of 0.25 pores / mm. 2 The air permeability of the barrier component 52 is 310 μm·Pa. -1 ·s -1 .

[0094] Example 4

[0095] The difference between A4 and A3 is that the aerosol generating product has an additional blocking component 52, which is a concave spherical aluminum shell. The blocking component 52 is clamped to the far end 4 of the aerosol generating product by an interference fit.

[0096] Example 5

[0097] The difference from A3 is that the limiting element 5 of the aerosol generating article in A5 includes a blocking member 52 of a convex spherical aluminum shell and a connecting member 51 of aluminum material. The connecting member 51 of aluminum material connects the blocking member 52 to the aerosol generating article. The inner support portion 516 connects to the blocking member 52 and then extends upstream of the aerosol generating article to connect to at least a portion of the bending portion 514 located inside the packaging 2. The outer wrapping portion 512 wraps around the outer periphery of the packaging 2 and connects to at least a portion of the bending portion 514 located on the outer periphery of the packaging 2.

[0098] Example 6

[0099] The difference from A4 is that the limiting element 5 of the aerosol generating article in A6 includes a concave spherical aluminum shell blocking member 52 and an aluminum connecting member 51. The aluminum connecting member 51 connects the blocking member 52 to the aerosol generating article. The edge of the blocking member 52 is directly bent 514. The outer wrapping part 512 is attached to the outer periphery of the packaging 2 and the connecting bent part 514 is located at least a portion of the outer periphery of the packaging 2.

[0100] Example 7

[0101] The difference between A7 and A5 is that the distance between the blocking member 52 of the aerosol generating product and the aerosol forming matrix 1 is 3mm, so as to form a longitudinal cavity 6, which extends 3mm in the axial direction and increases the volume.

[0102] Example 8

[0103] The difference between A8 and A5 is that the distance between the blocking member 52 of the aerosol generating product and the aerosol forming matrix 1 is 6mm, which makes the longitudinal cavity 6 extend 6mm in the axial direction and increase the volume.

[0104] Example 9

[0105] The difference between A9 and A6 is that the distance between the blocking member 52 of the aerosol generating product and the aerosol forming matrix 1 is 3mm, which makes the longitudinal cavity 6 extend 3mm in the axial direction and increase the volume.

[0106] Example 10

[0107] The difference between A10 and A6 is that the distance between the blocking member 52 of the aerosol generating product and the aerosol forming matrix 1 is 6mm, which makes the longitudinal cavity 6 extend 6mm in the axial direction and increase the volume.

[0108] Example 11

[0109] The difference between A11 and A5 is that the limiting element 5 of the aerosol generating product is made of polyethylene.

[0110] Example 12

[0111] The difference between A12 and A6 is that the limiting element 5 of the aerosol generating product is made of polyethylene.

[0112] Comparative Example 2

[0113] The difference between B0 and A0 is that B0 aerosol generating products have an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm, and a thickness of 80 micrometers embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating products is 700 Pa.

[0114] Example 13

[0115] The difference between B1 and A1 is that B1 aerosol generating product has an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm, and a thickness of 80 micrometers embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating product is 700 Pa.

[0116] Example 14

[0117] The difference between B2 and A2 is that the added blocking component 52 of the aerosol generating product is a flat circular polyethylene sheet, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm, and a thickness of 80 micrometers is embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating product is 700 Pa.

[0118] Example 15

[0119] The difference between B3 and A3 is that the added blocking component 52 of B3 aerosol generating product is a convex spherical polyethylene shell, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 micrometers is embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating product is 700 Pa.

[0120] Example 16

[0121] The difference between B4 and A4 is that the added blocking element 52 of the aerosol generating product is a concave spherical polyethylene shell, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 micrometers is embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating product is 700 Pa.

[0122] Example 17

[0123] The difference between B5 and A5 is that B5 aerosol generating product has an additional blocking member 52 which is a convex spherical polyethylene shell, a connector 51 which is made of polyethylene, and an outer wrapping part 512 which extends downstream to the outer part of the packaging 2 which extends 3mm upstream and downstream from the aerosol forming matrix 1. Furthermore, an iron-nickel alloy with a length of 10mm, a width of 4.0mm, and a thickness of 80 micrometers is embedded in the aerosol forming matrix 1. The overall absorption resistance of the aerosol generating product is 700Pa.

[0124] Example 18

[0125] The difference between B6 and A6 is that B6 aerosol generating product has an additional blocking member 52 which is a concave spherical polyethylene shell, a connector 51 which is made of polyethylene, and an outer wrapping part 512 which extends downstream to the outer part of the packaging 2 which extends 3mm upstream and downstream from the aerosol forming matrix 1. Furthermore, an iron-nickel alloy with a length of 10mm, a width of 4.0mm, and a thickness of 80 micrometers is embedded in the aerosol forming matrix 1 section. The overall absorption resistance of the aerosol generating product is 700Pa.

[0126] The above tests were conducted on the aerosol-generating products of A0 to A12. The tests were repeated 20 times, and the average value was taken. The heater used was a circumferential heating aerosol transfer device with a 14mm long circumferential graphene / copper composite heat sink at the bottom. The suction interval was set to 15s / puff, the suction depth to 55mL, and the duration of a single suction to 3s. A total of 12 suction ports were used. Thermocouples were used to measure the temperature at the center of the upstream longitudinal cavity 6 of the aerosol-generating product during the suction intervals. The gas temperature test results are shown in Table 1, and the aerosol concentration and nicotine concentration test results are shown in Table 2 and Figure 23. The concentration values ​​of A0 to A12 were based on 80% of the average concentration value of A0.

[0127] Table 1 Temperature at the center of the longitudinal cavity 6 of the aerosol-generated products A0~A12 and B0~B6

[0128] Table 2. Aerosol concentrations and nicotine concentrations for A0–A12 (poll-by-pollution)

[0129] The aerosol-generating products of grades B0 to B6 were tested for smoke volume by mechanical extraction. The test was repeated 20 times, and the average value was taken. An aerosol transfer device with an electromagnetic induction heating mechanism was used. The extraction interval was set to 15 s / puff, the extraction depth to 55 mL, and the duration of a single extraction to 3 s. A total of 12 extraction ports were used. Thermocouples were used to measure the temperature at the center of the longitudinal cavity 6 of the aerosol-generating product during the extraction intervals. The aerosol concentration and nicotine concentration test results are shown in Table 3 and Figure 24. The concentration values ​​of grades B0 to B6 were based on 80% of the average concentration value of grade B0. The temperature test results are shown in Table 1.

[0130] Table 3. Aerosol concentrations and nicotine concentrations for B0–B6

[0131] From the aerosol concentration and nicotine concentration data graphs of embodiments A0 to A12, it can be seen that the aerosol concentrations of embodiments A5 to A10 are significantly higher than those of other embodiments. These embodiments share the common feature of having an outer wrapping part 512 made of aluminum. Furthermore, embodiments A1 to A12 all have significantly higher aerosol concentrations than embodiment A0, indicating that setting a limiting element 5 at the distal end 4 of the aerosol generating article is beneficial to increasing the aerosol concentration per sip. Among A1 to A12, the optimal embodiment is A8. The A8 structure consists of a limiting element 5 including a convex spherical aluminum shell blocking member 52 and an aluminum connecting member 51. The aluminum connecting member 51 connects the blocking member 52 to the aerosol generating article. The A8 structure has the highest nicotine concentration, while the A10 structure, which has the second highest aerosol concentration, does not have the second highest nicotine concentration. In contrast, the A8 and A7 structures have the highest and second highest nicotine concentrations, respectively. The common feature of the A8 and A7 structures is the design of a blocking member 52 with a convex spherical aluminum shell.

[0132] From the aerosol and nicotine concentration data graphs of embodiments B0 to B6, embodiments B1 to B6 all have higher aerosol concentrations than embodiment B0. However, the increase in aerosol concentration of embodiments B1 to B6 relative to embodiment B0 is not as significant as that of embodiments A1 to A12 relative to embodiment A0. This is attributed to the relatively smaller longitudinal cavities 6 in embodiments B1 to B6, and the fact that the thermal conductivity of the polyethylene material in embodiments B1 to B6 is much lower than that of the aluminum material. Structure B5 has the highest aerosol concentration and a lower nicotine concentration. Structures B6 and B4 have the highest and second highest nicotine concentrations, respectively. A common feature of these structures is the design of a concave spherical aluminum shell with a blocking element 52. The terms "highest" and "second highest" in the above description are used only for convenience to indicate the difference between the two concentrations and do not represent specific numerical values.

[0133] This application embodiment effectively controls the temperature of the aerosol-forming matrix portion at the distal end of the aerosol-generating product through the design of a limiting element. This promotes the upstream aerosol condensation process and physically prevents aerosol escape, effectively solving the problem of lateral and axial aerosol escape. Simultaneously, it provides support strength and rigidity at the distal end of the aerosol-generating product, improving its effective utilization rate and meeting consumers' consistent product usage requirements. Furthermore, the limiting element in this application embodiment can act as a guide, selectively concentrating aerosols in the center or circumferential portion of the aerosol-forming matrix portion. This allows the aerosol-generating product to adapt to different heating methods in central or circumferential aerosol transfer devices, enhancing consumer satisfaction.

[0134] The embodiments described above are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An aerosol generating article for restricting gas flow, comprising an aerosol forming matrix suitable for generating inhalable aerosols when heated by an aerosol delivery device, the aerosol generating article further comprising a plurality of components assembled within a tube formed by a package to form a rod-like member, the rod-like member comprising a nozzle end located downstream of the aerosol forming matrix and a distal end located upstream of the nozzle end; characterized in that: An upstream limiting element is provided at the aerosol forming matrix. The limiting element is connected to the packaging to increase the inhalation resistance upstream of the aerosol forming matrix. The limiting element includes a connector connected to the packaging and a blocking member connected to the connector. The minimum distance between the blocking member and the aerosol forming matrix is ​​less than or equal to 7 mm.

2. The aerosol-generating product for restricting gas flow according to claim 1, characterized in that: The barrier has a longitudinal cavity between itself and the aerosol forming matrix, the volume of which is less than or equal to the volume of a flow channel formed by the upstream packaged material of the aerosol forming matrix.

3. The aerosol-generating product for restricting gas flow according to claim 2, characterized in that: The connector includes an outer wrapping portion attached to the outer periphery of the packaging, the outer wrapping portion extending to the outer periphery of the aerosol forming matrix.

4. The aerosol-generating product for restricting gas flow according to claim 3, characterized in that: The connector further includes a bend around the end face of the tube formed by the packaging, the blocking member being connected to the bend and at least partially located within the tube formed by the packaging.

5. The aerosol-generating article for restricting gas flow according to claim 2 or 3, characterized in that: The connector also includes an inner support portion connected to the blocking member, the inner support portion being housed within the tube formed by the packaging.

6. The aerosol-generating article for restricting gas flow according to claim 5, characterized in that: The connector also includes an outer wrapping portion connected to the inner support portion, with a gap formed between the inner support portion and the outer wrapping portion, and the distal end of the package being at least partially embedded in the gap.

7. The aerosol-generating article for restricting gas flow according to claim 5, characterized in that: The blocking element protrudes and / or is recessed in the direction of the aerosol forming matrix.

8. The aerosol-generating article for restricting gas flow according to claim 6, characterized in that: The blocking element has one or more ventilation holes, and the blocking element has a suction resistance (RTD) of less than 70 mm H2O.

9. The aerosol-generating article for restricting gas flow according to claim 1, characterized in that: The air permeability of the barrier is greater than or equal to 100 μm·Pa. -1 ·s -1 .

10. The aerosol-generating article for restricting gas flow according to claim 1, characterized in that: The polar moment of inertia of the blocking element is less than 500 mm. 4 .

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