Aerosol generating product capable of limiting gas flow
By introducing restriction elements into the aerosol-generating products, increasing suction resistance and reducing gas flow, the problems of odor residues and aerosol escape of the aerosol transmission device are solved, and more efficient aerosol utilization and a better user experience are achieved.
Patent Information
- Application Number
- CN202510021901.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-05-06
Smart Images
Figure CN119924574A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat without burning, and in particular to an aerosol generating product. Background Art
[0002] In the field of heat not burn tobacco, the aerosol-forming matrix segment in the aerosol-generating product generally presents a brown-gray appearance before inhalation. After inhalation, the aerosol-forming matrix segment undergoes chemical reactions such as oxidation and thermal cracking due to baking and heating, and the organic materials therein, such as cellulose and lignin, undergo a certain degree of carbonization, and the color of the aerosol-forming matrix segment further deepens to brown-black or black. At the same time, due to the high temperature of the aerosol-forming matrix segment, the hot aerosol has a strong Brownian motion ability, and escapes through the air-permeable part of the aerosol-generating product and remains inside the aerosol transfer device. Over time, the interior of the aerosol transfer device has serious odor residue. Although some designs add a filter element to the upstream section of the aerosol-forming matrix segment, due to the suction resistance and air intake design requirements of the aerosol-generating product, the filter element is often made of porous materials. Although the above design achieves a certain effect of reducing odor and maintaining cleanliness, it cannot fundamentally solve the problem of odor residue after long-term use of the aerosol transfer device. In long-term smoker surveys, it can be found that the odor residue problem of aerosol delivery devices is not entirely caused by the aerosol escaping along the axial direction of the aerosol generating product, and the aerosol also escapes from the lateral direction of the aerosol generating product. Therefore, considering adding a design of a laterally wrapped aerosol-forming matrix segment may be beneficial to solving the odor residue problem.
[0003] However, the above-mentioned means still cannot effectively solve the problem of odor residue. Through further experiments, it was found that the fundamental reason for the problem of odor residue in the device is that the upstream aerosol is not effectively treated when using aerosol generating products. At the same time, consumers are limited by complex factors such as the type of aerosol transfer device, the structure of aerosol generating products, and the consumer's puffing habits when using aerosol generating products, resulting in the problem of aerosol attenuation. Summary of the invention
[0004] The present application provides an aerosol-generating product for restricting gas flow, comprising an aerosol-forming substrate suitable for generating an inhalable aerosol when heated by an aerosol transfer device, the aerosol-generating product also comprising a plurality of components, the plurality of components being assembled in a tube body formed by a package to form a rod-shaped member, the rod-shaped member comprising a nozzle end located downstream of the aerosol-forming substrate and a distal end located upstream of the nozzle end; a restricting element is provided upstream of the aerosol-forming substrate, the restricting element is connected to the package to increase the inhalation resistance upstream of the aerosol-forming substrate, the restricting element comprises a connecting member connected to the package and a blocking member connected to the connecting member, the minimum distance between the blocking member and the aerosol-forming substrate is less than or equal to 7 mm.
[0005] As a preferred embodiment, there is a longitudinal cavity between the blocking member and the aerosol-forming substrate, and the volume of the longitudinal cavity is less than or equal to the volume of a flow channel formed by the packaged material 2 upstream of the aerosol-forming substrate.
[0006] As a preferred embodiment, the connecting member includes an outer wrapping portion attached to the outer peripheral side of the packaging, and the outer wrapping portion extends to the outer peripheral side of the aerosol-forming substrate.
[0007] As a preferred solution, the connecting member further comprises a bending portion surrounding the end surface of the tube body formed by the packaging, and the blocking member is connected to the bending portion and is at least partially located in the tube body formed by the packaging.
[0008] As a preferred solution, the connecting member further includes an inner supporting portion connected to the blocking member, and the inner supporting portion is accommodated in a tube body formed by the packaging.
[0009] As a preferred embodiment, the connecting member further comprises an outer wrapping portion connected to the inner supporting portion, a gap is formed between the inner supporting portion and the outer wrapping portion, and the distal end of the packaging is at least partially embedded in the gap.
[0010] As a preferred solution, the blocking member is convex and / or concave toward the aerosol-forming substrate.
[0011] As a preferred solution, the barrier has one or more ventilation holes, and the barrier has a resistance to draw (RTD) H2O of less than 70 mm.
[0012] As a preferred solution, the air permeability of the barrier is greater than or equal to 100m•Pa -1 •s -1 .
[0013] As a preferred solution, the polar moment of inertia of the blocking member is less than 500 mm. 4 .
[0014] The beneficial effects of the present application are: on the one hand, by setting the distance between the restriction element and the aerosol-forming substrate, the permeability of the gas passing through the aerosol-generating product is restricted, and the inhalation resistance of the upstream area of the aerosol-forming substrate is increased to provide the desired ventilation and inhalation resistance. During the negative pressure formed by the consumer's inhalation, the external airflow flows into the restriction element, but in the inhalation interval, the restriction element restricts the escape of the aerosol, and the restricted aerosol can play a role in compensating the aerosol concentration and reducing the aerosol contamination of the aerosol transfer device; on the other hand, the connector of the restriction element can extend to the outside of the aerosol-generating product and contact the inside of the aerosol transfer device, thereby achieving the effect of reducing the temperature of the distal aerosol, reducing the average kinetic energy of the gas molecules, and reducing the escape of the aerosol to a greater extent; the blocking member of the restriction element can be designed to have a shape with different polar moments of inertia to affect the airflow density distribution at different positions in the restriction element, so as to adapt to aerosol transfer devices with different heating mechanisms such as the center and the circumference and promote the thermal decomposition process of the aerosol-forming substrate, so as to achieve the purpose of effectively releasing nicotine. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0016] Figure 1 is a schematic diagram of an aerosol generating product of Comparative Example 1 of the present application; Figure 2 is a schematic diagram of an aerosol generating product according to Example 1 of the present application; Figure 3 is a schematic diagram of an aerosol generating product according to Example 2 of the present application; Figure 4 is a schematic diagram of an aerosol generating product according to Example 3 of the present application; Figure 5 is a schematic diagram of an aerosol generating product according to Example 4 of the present application; Figure 6 is a schematic diagram of an aerosol generating product according to Example 5 of the present application; Figure 7 is a schematic diagram of an aerosol generating article according to Example 6 of the present application; Figure 8 is a schematic diagram of an aerosol generating product according to Example 7 of the present application; Fig. 9 is a schematic diagram of an aerosol generating product according to Example 8 of the present application; Fig.10 is a schematic diagram of an aerosol generating product according to Example 9 of the present application; Fig.11 is a schematic diagram of an aerosol generating product according to Example 10 of the present application; Fig.12 is a schematic diagram of an aerosol generating product according to Example 11 of the present application; Fig.13 is a schematic diagram of an aerosol generating product according to Example 12 of the present application; Fig.14 is a schematic diagram of an aerosol generating product of Comparative Example 2 of the present application; Fig.15 is a schematic diagram of an aerosol generating product according to Example 13 of the present application; Fig.16 is a schematic diagram of an aerosol generating article according to Example 14 of the present application; Fig.17 is a schematic diagram of an aerosol generating product according to Example 15 of the present application; Fig.18 is a schematic diagram of an aerosol generating article according to Example 16 of the present application; Fig.19 is a schematic diagram of an aerosol generating article according to Example 17 of the present application; Fig. 20 is a schematic diagram of an aerosol generating article according to Example 18 of the present application; Fig.21 is a schematic diagram of a barrier member of the aerosol generating article in the present application; Fig. 22 is a schematic diagram of an aerosol generating article according to an embodiment of the present application; Fig.23 is a smoke volume curve diagram of Examples 1 to 12 of the present application and Comparative Example 1; Fig.24 It is a smoke volume curve diagram of Examples 13 to 18 of the present application and Comparative Example 2. DETAILED DESCRIPTION
[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0018] Please refer to Figures 1 to 22An embodiment of the present application provides an aerosol-generating product for restricting gas flow, including an aerosol-forming substrate 1 suitable for generating an inhalable aerosol when heated by an aerosol transfer device. The aerosol-generating product also includes a plurality of components, which are assembled in a tube body formed by a packaging material 2 to form a rod-shaped member, and the rod-shaped member includes a nozzle end 3 located downstream of the aerosol-forming substrate 1 and a distal end 4 located upstream of the nozzle end 3.
[0019] Specifically, the aerosol-forming substrate 1 and multiple components of the embodiment of the present application are wrapped in a packaging material 2, so that the aerosol-generating product is a rod-shaped member. The multiple components mentioned above include, but are not limited to, the filter segment 10, the cooling segment 9, the support segment, the functional segment, and an integral element formed by a combination thereof. Among them, the functional segment includes, but is not limited to, the functions of cooling, filtering, and supporting, and may also have the functions of releasing fragrance, replenishing, etc.
[0020] Specifically, the packaging material 2 of the embodiment of the present application has a distal end 4 located upstream of the mouthpiece end 3, a proximal end located downstream of the mouthpiece end 3, and a tubular packaging material 2 body located between the distal end 4 and the proximal end. The aerosol-forming matrix 1 is located in the packaging material 2 near the distal end 4, and the filter segment is located in the packaging material 2 near the proximal end. According to actual needs, the above components can be arranged in the packaging material 2. Among them, the packaging material refers to a tubular body that can accommodate multiple components. A typical material of the packaging material is cellulose paper. Based on the different quantitative and tensile strengths of cellulose paper, the packaging material accommodates multiple components in a manner including but not limited to rolling, canning, and twisting. Optionally, the main components of the material 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 material includes fillers, adhesives, and wet strength agents to ensure the mechanical strength of the aerosol-generating product. In some embodiments, the packaging material can also be made of natural hot plant leaves, tobacco leaves, artificially regenerated leaves, etc.
[0021] Understandably, the aerosol-forming matrix 1 can be tobacco flakes, tobacco shreds, stem shreds, expanded tobacco shreds, expanded stem shreds, and tobacco particles, and is characterized by containing smoking substances such as glycerin and propylene glycol, and addictive substances such as nicotine-like substances, and flavor substances such as flavors and fragrances can also be added. The mechanism of aerosol formation is that after the aerosol-forming matrix 1 is heated, volatile smoking substances, addictive substances, flavor substances, etc. are released to form steam, which is then cooled during the suction process. Due to the nucleation mechanism, the steam condenses to form droplets. When the temperature is low enough, the number of droplets is large enough, and they condense with each other to form large-size aerosol droplets. In addition to lowering the smoke temperature to support the cooling of volatile substances from the upstream aerosol-forming matrix 1 to form an aerosol, the cooling section also plays a role in supporting the aerosol generation product. Downstream of the cooling section, a filter section is provided. The filter section is in contact with the oral cavity to support lung inhalation and at the same time plays a role in filtering harmful substances. The filter section is often made of fiber bundles, and the dense fiber bundles can effectively intercept harmful substances in the smoke.
[0022] Furthermore, a limiting element 5 is provided upstream of the aerosol-forming substrate 1 in the embodiment of the present application, and the limiting element 5 is connected to the packaging 2 to increase the inhalation resistance upstream of the aerosol-forming substrate 1. The limiting element 5 includes a connecting piece 51 connected to the packaging 2 and a blocking piece 52 connected to the connecting piece 51, and the minimum distance between the blocking piece 52 and the aerosol-forming substrate 1 is less than or equal to 7 mm.
[0023] Specifically, the material thickness of the limiting element 5 is 0.05-3.5 mm, so as to avoid being too thin to provide a limiting effect, and to avoid being too thick to cause an excessive limiting effect, thereby affecting ventilation and suction resistance. The limiting element 5 is configured as a film, a sheet, a plate, a thin material, and a combination of two or more. It is understandable that the limiting element 5 adopts the above forms and corresponding combinations without limitation, and can be matched according to actual needs, such as layered stacking, and the number of layers can be set according to actual needs, such as a combination of a film and a plate.
[0024] In addition, the aerosol generating product of the embodiment of the present application 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 is arranged in the matrix parallel to the longitudinal axis. The length of the receptor 11 and the aerosol forming matrix 1 in the longitudinal axis direction are equal. Among them, the thickness of the receptor 11 is 0.03-0.18mm, the width is 1.5-4.5mm, and the length is 9~18mm. The ratio of the receptor 11 to the total length of the aerosol generating product is between 0.20~0.45. The receptor is a ferromagnetic alloy containing iron, nickel and cobalt components. In some embodiments, the receptor 11 can be composed of a soft magnetic alloy or composed of two or more alloys containing iron, nickel and cobalt components. Preferably, the material of the receptor 11 is a homogeneous soft magnetic alloy. The susceptor 11 has excellent electromagnetic properties and can utilize the electrical energy in the external circuit based on the principle of wireless power transmission, and heat the aerosol-forming substrate based on the principle of electromagnetic induction heating. The Curie temperature of the susceptor 11 is between 300 and 400°C. When the Curie temperature of the susceptor 11 is higher than 400°C, the aerosol-generating product has the risk of losing temperature and burning. This is because the susceptor 11 undergoes a ferromagnetic-paramagnetic transition near the Curie temperature, resulting in a significant decrease in magnetism, thereby causing the aerosol transfer device to stop heating.
[0025] Furthermore, a longitudinal cavity 6 is provided between the blocking member 52 of the embodiment of the present application and the aerosol-forming substrate 1 , and the volume of the longitudinal cavity 6 is less than or equal to the volume of a flow channel 12 formed by the packaged material 2 upstream of the aerosol-forming substrate 1 .
[0026] 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 package 2. In some embodiments, the upstream end surface of the package 2 is flush with the upstream end surface of the aerosol-forming substrate 1, and together they constitute the distal end 4 of the aerosol-generating product. In other embodiments, the upstream portion of the package 2 extends axially and exceeds the upstream end surface of the aerosol-forming substrate 1, so that the distal end 4 of the package 2 constitutes the end of the aerosol-generating product. If the distal end 4 of the package 2 constitutes the end of the aerosol-generating product, the space between the extended portions of the package 2 constitutes a flow channel, and at this time, the distal end 4 of the package 2 is the distal end 4 of the aerosol-generating product.
[0027] It can be understood that the minimum distance between the barrier 52 of the embodiment of the present application and the aerosol-forming substrate 1 is less than or equal to 7 mm, and when the minimum distance between the barrier 52 and the aerosol-forming substrate 1 is 0, the barrier 52 contacts the aerosol-forming substrate 1. When the minimum distance between the barrier 52 and the aerosol-forming substrate 1 is greater than 0 mm and less than or equal to 7 mm, the barrier 52 is in the flow channel, and there is a gap between the barrier 52 and the aerosol-forming substrate 1 to form a longitudinal cavity 6; when the barrier 52 is at the farthest position from the aerosol-forming substrate 1, the volume of the longitudinal cavity 6 between the barrier 52 and the aerosol-forming substrate 1 is equal to the volume of the flow channel 12.
[0028] When the aerosol generating product of the present application is inserted into the aerosol delivery device for use, after the consumer draws inhalation through the filter segment at the proximal end, negative pressure is generated inside the aerosol generating product, and the external gas can be filled into the aerosol generating product through the limiting element 5 at the distal end 4. In addition, the longitudinal cavity 6 has the function of storing gas, and the gas taken away by each suction can be filled and replenished in time. It should be understood that although the limiting element 5 increases the inhalation resistance of the upstream region of the aerosol-forming substrate 1, the limiting element 5 also has a suitable air permeability.
[0029] Understandably, since the aerosol transfer device continuously heats the aerosol-generating product, the aerosol-forming substrate 1 of the aerosol-generating product will continue to be heated to generate aerosol, and the consumer's puffing action is intermittent, so during the puffing interval, the hot aerosol will diffuse irregularly to the surroundings. After the last puffing action is completed, the longitudinal cavity 6 is negatively pressurized, and the external gas fills into the longitudinal cavity 6. The hot aerosol diffused into the longitudinal cavity 6 will mix with the gas filled in, waiting for the next puffing action.
[0030] In the above process, the hot aerosol will exchange heat with the gas entering from the outside. On the one hand, the temperature of the hot aerosol will be reduced, thereby reducing the Brownian motion ability of the aerosol molecules and reducing the possibility of the aerosol overflowing through the limiting element 5. With the restriction of the limiting element 5, more aerosol can be stored in the longitudinal cavity 6. When the consumer draws the next puff, the aerosol stored in the longitudinal cavity 6 can be mixed with the newly generated hot aerosol to achieve the purpose of compensating the aerosol concentration and meet the consumer's requirements for the consistency of taste of each puff during the entire puffing process. On the other hand, the temperature in the longitudinal cavity 6 is reduced to reduce the temperature of the end of the aerosol-generating product, which can prevent the packaging 2 wrapped on the outside from burning due to high temperature and further reduce the possibility of hot aerosol overflowing.
[0031] like Figures 1 to 5 , and combined with Fig. 22 The maximum equivalent diameter of the cross section of the blocking member 52 in the embodiment of the present application is less than or equal to the inner diameter of the rod-shaped structure formed by the packaging object 2.
[0032] Specifically, the blocking member 52 can be arranged in a horizontal and / or curved shape in the packaging 2, and the maximum equivalent diameter of the cross section of the blocking member 52 is limited so that the blocking member 52 is directly surrounded by the packaging 2, or the blocking member 52 is directly connected to the distal end 4.
[0033] Please refer to Figures 6 to 13 On the basis of the above-mentioned embodiment, the connector 51 of the embodiment of the present application includes an outer wrapping portion 512 attached to the outer peripheral side of the packaging 2, and the outer wrapping portion 512 extends to the outer peripheral side of the aerosol-forming matrix 1.
[0034] It can be understood that the outer wrapping portion 512 is used to connect the blocking member 52 with the packaging 2, so as to fix the blocking member 52 and further improve the strength of the distal end 4 of the aerosol generating product. In addition, since the outer wrapping portion 512 is located outside the aerosol generating product, when the aerosol generating product is inserted into the aerosol transfer device, the outer wrapping portion 512 contacts the aerosol transfer device, which reduces the possibility of aerosol diffusion in the circumferential direction, while achieving the effect of reducing the aerosol temperature at the distal end 4, reducing the average kinetic energy of the aerosol molecules, and reducing the escape of the aerosol to a greater extent. Among them, the connection method between the outer wrapping portion 512 and the packaging 2 includes but is not limited to vacuum bonding, mechanical force, van der Waals force, hydrogen bonding, and adhesive bonding.
[0035] In some embodiments, the outer wrapping portion 512 of the embodiments of the present application may also extend to the outer peripheral sides of other components of the aerosol generating article.
[0036] Please refer to Fig. 22 On the basis of the above-mentioned embodiment, the connecting member 51 of the embodiment of the present application further includes an inner supporting portion 516 connected to the blocking member 52 , and the inner supporting portion 516 is accommodated in the tube body formed by the packaging object 2 .
[0037] Specifically, the blocking member 52 is fixed by connecting the inner support portion 516 to the packaging 2, wherein the connection method between the inner support portion 516 and the packaging 2 includes but is not limited to vacuum bonding, mechanical force, van der Waals force, hydrogen bonding, and adhesive bonding.
[0038] In some embodiments, the blocking member 52 is fixed by combining 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 embedded and fixed in the gap 7 through the distal end 4 of the packaging 2, thereby achieving the fixing purpose.
[0039] Please refer to Fig. 22On the basis of the above-mentioned embodiment, the connecting member 51 of the embodiment of the present application also includes a bending portion 514 which surrounds the end surface of the tube body formed by the packaging object 2, and the blocking member 52 is connected to the bending portion 514 and is at least partially located in the tube body formed by the packaging object 2.
[0040] In some embodiments, the blocking member 52 is connected to at least a portion of the bending portion 514 located inside the packaging 2 and is directly fixed by the bending portion 514. In other embodiments, the bending portion 514 is at least partially located on the outer peripheral side of the packaging 2, and the blocking member 52 is fixed by the bending portion 514 and the outer wrapping portion 512. In other embodiments, the blocking member 52 is connected to the inner support portion 516, the inner support portion 516 is connected to at least a portion of the bending portion 514 located inside the packaging 2, and is fixed by the bending portion 514 and the inner support portion 516. In other embodiments, the blocking member 52 is fixed by the coordination of the bending portion 514, the outer wrapping portion 512 and the inner support portion 516, the blocking member 52 is connected to the inner support portion 516, the inner support portion 516 is connected to at least a portion of the bending portion 514 located inside the packaging 2, and the outer wrapping portion 512 is connected to at least a portion of the bending portion 514 located on the outer peripheral side of the packaging 2. The connection reliability of the connecting member 51 and the packaging 2 is increased by providing the bending portion 514.
[0041] It should be noted that, in order to facilitate the understanding of the technical solution, there is a distance between the limiting element 5 and the packaging 2 in the drawings of the present application specification. This is for the convenience of illustrating the structure. In actual products, they are attached together. The distance in the drawings will not affect the technical personnel's understanding of the technical solution.
[0042] Furthermore, the barrier 52 of the embodiment of the present application has one or more ventilation holes 8, and the barrier 52 has a resistance to draw (RTD) H2O of less than 70 mm.
[0043] It should be understood that the size, shape, number and distribution of the ventilation holes 8 are not limited, so that the draw resistance is less than 70 mm of the draw resistance (RTD) H2O. In the embodiment of the present application, the total draw resistance of the aerosol-generating product can be controlled by arranging ventilation holes 8 on the blocking member 52, thereby achieving the desired draw resistance and ventilation effect. Specifically, the shape of the ventilation holes 8 includes but is not limited to any shape such as circle, rhombus, polygon, etc. The ventilation holes 8 can be realized by laser perforation, electron beam perforation, mechanical perforation, etc.
[0044] Furthermore, the air permeability of the blocking member 52 of the limiting element 5 of the embodiment of the present application is greater than or equal to 100 μm•Pa -1 •s -1 .
[0045] Specifically, the air permeability of the blocking member 52 of the limiting element 5 is ≥ 100 μm•Pa -1 •s -1, by limiting the air permeability of the barrier 52, so that the gas continues to flow in from the upstream of the aerosol-forming substrate 1. In some embodiments, the connector 51 of the limiting element 5 also meets the above air permeability and draw resistance.
[0046] Furthermore, the blocking member 52 of the embodiment of the present application is convex and / or concave toward the aerosol-forming substrate 1 .
[0047] Understandably, in the two types of blocking member 52 shape designs, convex and concave, according to the gas flow continuity equation based on the law of conservation of mass, due to the difference in the shape design of the blocking member 52, when the gas flows through the blocking member 52, a local airflow density difference will be generated. In the convex blocking member 52 design, the airflow density at the center position is smaller, while the circumferential airflow density is larger; while in the concave blocking member 52 design, the airflow density at the center position is larger, while the circumferential airflow density is smaller; since the thermal decomposition process of the aerosol-forming substrate 1 is an oxidation reaction, having a greater airflow density at a higher temperature position of the aerosol-forming substrate 1 will be beneficial to its thermal decomposition process and release more nicotine.
[0048] Specifically, the cross-sectional shape of the protrusion or depression of the blocking member 52 may be U-shaped, V-shaped or wavy, and the number of the protrusion or depression may be one or more, and the multiple protrusions or depressions are arranged at intervals along the radial direction of the package 2. By arranging the protrusion or depression on the blocking member 52, the direction of the airflow is directed and the flow rate of the airflow is increased. It can be understood that when the blocking member 52 is in the form of a non-flat surface, the non-flat surface includes a curved surface, a conical surface, a pyramidal surface, a cylindrical surface, a prism surface, a truncated table surface, a prism surface, etc., the number and position of the non-flat protrusions or depressions have a significant effect on the airflow velocity distribution. The airflow velocity in the aerosol generating product will increase as the airflow cross section shrinks and decrease as the cross section expands. In the design of different blocking members 52 with the same total airflow inflow, the different local acceleration positions of the blocking member 52 will cause the airflow inflow during the suction process to change with the plane structure of the blocking member 52. The position difference is formed, showing the characteristics of large airflow inflow at local sites and small airflow inflow at local sites; since the local sites with large airflow inflow are obtained through the acceleration mechanism, when in the puff interval, no negative pressure is generated as in the puff process, and therefore the blocking member 52 has the effect of limiting the outflow of the inflowing aerosol; further, when the material of the blocking member 52 has a high thermal conductivity, such as metal or carbon material, heat exchange occurs with the inflowing aerosol and effectively cools it down, further reducing its molecular kinetic energy and thus reducing aerosol overflow.
[0049] Specifically, the polar moment of inertia of the blocking member 52 of the limiting element 5 is less than 500 mm. 4The blocking member 52 forms a protrusion and / or a depression in the direction toward the aerosol-forming substrate 1 in the package 2, and the polar moment of inertia of the blocking member 52 also changes accordingly. By limiting the polar moment of inertia and air permeability of the blocking member 52, the shape and material of the blocking member 52 in the package 2 are limited, so as to ensure the inflow of air while directional introduction of the airflow and increase the flow rate of the airflow.
[0050] The test standard of the air permeability of the barrier 52 of the embodiment of the present application refers to GB / T 22901-2008, and the air permeability test instrument can be selected from Sheffield, Gurley, or a device with improved components based on the test principles of the first two instruments. According to the accuracy and principle of the test element used by the air permeability test instrument, the accuracy and repeatability of the test result are allowed to fluctuate within 5%.
[0051] The air permeability calculation formula based on GB / T22901-2008 standard is as follows: In the above formula: V is the volume of air passing through the test area, in mL; S is the area of the test area, in m 2 ; is the pressure difference in kPa; t is the test duration in s.
[0052] Under the air permeability restriction condition of the barrier 52, further, the barrier 52 should have a resistance to draw (RTD) of no more than 70 mm water column; the resistance to draw test standard of the barrier 52 refers to GB / T 18767-2002.
[0053] The cross-sectional inertia moment of the blocking member 52 is determined by the geometric shape, spatial position, and reference axis of the blocking member 52, and the calculation formula is as follows: In the above formula, the section inertia moment I is a combination of the polar moment of inertia and the adjustment term of the parallel axis theorem. When the reference axis is the central axis, the d value in the above formula is 0. At this time, the section inertia moment I 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 the area A and the central axis.
[0054] Taking into account the shape characteristics of the aerosol-generating article strip, the reference axis of the cross-sectional moment of inertia of the barrier 52 is defined as the central axis of the aerosol-generating article. No matter what cross-sectional shape the barrier 52 has and how it is arranged, 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 numerical limit refers to the polar moment of inertia of the blocking member 52 before the aerosol generating product is used.
[0055] In one aspect of the embodiment of the present application, by setting the distance between the restriction element 5 and the aerosol-forming substrate 1, the permeability of the gas passing through the aerosol-generating product is restricted, and the inhalation resistance of the upstream area of the aerosol-forming substrate 1 is increased to provide the desired ventilation and inhalation resistance. During the negative pressure formed by the consumer's inhalation, the external airflow flows into the restriction element 5, but in the inhalation interval, the restriction element 5 restricts the escape of the aerosol, and the restricted aerosol can play a role in compensating the aerosol concentration and can also reduce the aerosol contamination of the aerosol delivery device; on the other hand, the connector 51 of the restriction 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 reducing the escape of the aerosol to a greater extent; the restriction element 5 can be designed to have a shape with different polar moments of inertia to affect the distribution of the airflow density at different positions in the restriction element 5, so as to adapt to the aerosol delivery device with different heating mechanisms such as the center and the circumference and promote the thermal decomposition process of the aerosol-forming substrate 1, so as to achieve the purpose of effectively releasing nicotine.
[0056] The present application is further described below through specific examples. It should be understood that, for the convenience of distinction, A0 to A12 and B0 to B6 refer to a single aerosol generating product embodiment, as follows: Comparative Example 1 The total length of the A0 aerosol generating product is 45 mm and the outer diameter is 7 mm. The upstream distal 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 an 18 mm hollow cavity cooling section and a 10 mm single denier 22 denier, total denier 35000 denier acetate fiber filter element nozzle section. The overall suction resistance of the aerosol generating product is 650 Pa.
[0057] Embodiment 1 The difference from A0 is that a flat disc-shaped barrier 52 is added to the distal end 4 of the A1 aerosol generating product. The barrier 52 is made of wood pulp cellulose paper, and the wood pulp fiber paper is bonded to the inside of the aerosol generating product using food-grade silica gel; the total denier of the acetate filter element nozzle section is 32000. The basis weight of the wood pulp cellulose paper is 40g / m 2 , thickness is 0.05 mm, the diameter of the wood pulp cellulose paper is 6.95 mm, and the polar moment of inertia of the blocking member 52 is about 236 mm4 , with 18 30-micron micropores, and a micropore density of 0.5 / mm 2 , the air permeability of the barrier 52 is 330m•Pa -1 •s -1 The overall draw resistance of the aerosol-generating article strip is 650Pa.
[0058] Embodiment 2 The difference from A1 is that the barrier 52 added to the A2 aerosol generating product is a flat circular sheet of aluminum material, which is clamped at the distal end 4 of the aerosol generating product by interference fit; the total denier of the acetate filter element nozzle section is 31000. The barrier 52 has a thickness of 0.1 mm and a diameter of 7 mm, and its polar moment of inertia is about 236 mm. 4 , with 18 55-micron micropores, and a micropore density of 0.5 / mm 2 , the air permeability of the barrier 52 is 290m•Pa -1 •s -1 .
[0059] Embodiment 3 The difference from A2 is that the barrier 52 added to the A3 aerosol generating product is a convex spherical aluminum shell, which is clamped at the distal end 4 of the aerosol generating product by interference fit; the total denier of the acetate filter element nozzle section is 31500. The barrier 52 has a thickness of 0.1 mm, an inner diameter of the aluminum material of 6.9 mm, and an outer diameter of 7.0 mm. The polar moment of inertia of the barrier 52 is about 153 mm 4 The 2 / 3 area of the aluminum spherical shell where the head is located has 8 65-micron micropores, and the 1 / 3 area below the head has 10 50-micron micropores, with a number density of 0.25 micropores / mm 2 , the air permeability of the barrier 52 is 310m•Pa -1 •s -1 .
[0060] Embodiment 4 The difference from A3 is that the blocking member 52 added to the aerosol generating product A4 is a concave spherical aluminum shell, and the blocking member 52 is clamped at the distal end 4 of the aerosol generating product by interference fit.
[0061] Embodiment 5 The difference from A3 is that the limiting element 5 of the A5 aerosol generating product includes a blocking member 52 of a convex spherical aluminum shell and a connecting member 51 made of aluminum. The connecting member 51 made of aluminum connects the blocking member 52 to the aerosol generating product. The inner support portion 516 is connected to the blocking member 52, and then extends upstream of the aerosol generating product to connect to at least a portion of the bending portion 514 located inside the packaging 2. The outer wrapping portion 512 is wrapped around the outer peripheral side of the packaging 2 and connected to at least a portion of the bending portion 514 located on the outer peripheral side of the packaging 2.
[0062] Embodiment 6 The difference from A4 is that the limiting element 5 of the A6 aerosol generating product 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 product, the edge of the blocking member 52 is directly bent 514, the outer wrapping portion 512 is attached to the outer peripheral side of the packaging 2 and the connecting bent portion 514 is located at least partially on the outer peripheral side of the packaging 2.
[0063] Embodiment 7 The difference from A5 is that the distance between the barrier 52 of the A7 aerosol-generating article and the aerosol-forming substrate 1 is 3 mm to form a longitudinal cavity 6, so that the longitudinal cavity 6 is extended by 3 mm in the axial direction and the volume is increased.
[0064] Embodiment 8 The difference from A5 is that the distance between the barrier 52 of the A8 aerosol-generating article and the aerosol-forming substrate 1 is 6 mm, so that the longitudinal cavity 6 is extended by 6 mm in the axial direction and the volume is increased.
[0065] Embodiment 9 The difference from A6 is that the distance between the barrier 52 of the A9 aerosol-generating article and the aerosol-forming substrate 1 is 3 mm, so that the longitudinal cavity 6 is extended by 3 mm in the axial direction and the volume is increased; Embodiment 10 The difference from A6 is that the distance between the barrier 52 of the A10 aerosol-generating article and the aerosol-forming substrate 1 is 6 mm, so that the longitudinal cavity 6 is extended by 6 mm in the axial direction and the volume is increased.
[0066] Embodiment 11 The difference from A5 is that the material of the limiting element 5 of the A11 aerosol generating article is polyethylene.
[0067] Embodiment 12 The difference from A6 is that the material of the limiting element 5 of the A12 aerosol generating article is polyethylene.
[0068] Comparative Example 2 The difference from A0 is that in the B0 aerosol generating product, an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1, and the overall suction resistance of the aerosol generating product is 700Pa.
[0069] Embodiment 13 The difference from A1 is that in the B1 aerosol generating product, an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1, and the overall suction resistance of the aerosol generating product is 700Pa.
[0070] Embodiment 14 The difference from A2 is that the additional barrier 52 of the B2 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 microns is embedded in the aerosol forming matrix 1. The overall suction resistance of the aerosol generating product is 700Pa.
[0071] Embodiment 15 The difference from A3 is that the additional barrier 52 of the B3 aerosol generating product is a convex spherical polyethylene thin shell, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1. The overall suction resistance of the aerosol generating product is 700Pa.
[0072] Embodiment 16 The difference from A4 is that the additional barrier 52 of the B4 aerosol generating product is a concave spherical polyethylene thin shell, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1. The overall suction resistance of the aerosol generating product is 700Pa.
[0073] Embodiment 17 The difference from A5 is that the B5 aerosol generating product has an additional blocking member 52 which is a convex spherical polyethylene thin shell, the connecting member 51 is made of polyethylene, the outer wrapping portion 512 extends downstream to the outer portion of the packaging 2 extending 3 mm upstream and downstream of the aerosol forming matrix 1, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1, and the overall suction resistance of the aerosol generating product is 700 Pa.
[0074] Embodiment 18 The difference from A6 is that the B6 aerosol generating product has an additional blocking member 52 which is a concave spherical polyethylene thin shell, the connecting member 51 is made of polyethylene, the outer wrapping portion 512 extends downstream to the outer portion of the packaging 2 extending 3 mm upstream and downstream of the aerosol forming matrix 1, and an iron-nickel alloy with a length of 10 mm, a width of 4.0 mm and a thickness of 80 microns is embedded in the aerosol forming matrix 1. The overall suction resistance of the aerosol generating product is 700 Pa.
[0075] The above is a test of the smoke volume of A0~A12 aerosol generating products. The test was repeated 20 times and the average value was taken. The heater used is an aerosol transfer device with a circumferential heating mechanism. The bottom of the aerosol transfer device has a 14mm circumferential heat sink made of graphene / copper composite material. The puff interval is set to 15s / puff, the puff depth is 55mL, and the single puff duration is 3s; the total number of puffs is 12. The temperature measurement method using a thermocouple is used to synchronously obtain the temperature at the center of the inner side of the upstream longitudinal cavity 6 of the aerosol generating product during the puff interval. The air temperature test results are shown in Table 1, and the aerosol concentration and nicotine concentration test results are shown in Tables 2 and Fig.23 The concentration values of A0~A12 are based on 80% of the average concentration value of A0.
[0076] Table 1 Temperature at the center of the longitudinal cavity 6 of aerosol generating articles A0-A12 and B0-B6 Table 2 Puff-by-puff aerosol concentration and nicotine concentration of A0-A12 The machine smoke volume test was conducted on the B0~B6 aerosol generating products. The samples were tested 20 times and the average value was taken. The heater used was an aerosol delivery device with an electromagnetic induction heating mechanism. The puff interval was set to 15s / puff, the puff depth was 55mL, and the single puff duration was 3s. The total number of puffs was 12. The temperature measurement method using a thermocouple was used to synchronously obtain the temperature at the center of the longitudinal cavity 6 of the aerosol generating product during the puff interval. The test results of aerosol concentration and nicotine concentration are shown in Tables 3 and Fig.24 The concentration values of B0~B6 are based on 80% of the average concentration value of B0; the temperature test results are shown in Table 1.
[0077] Table 3 Puff-by-puff aerosol concentration and nicotine concentration of B0 to B6 From the aerosol concentration and nicotine concentration data diagrams of the embodiments A0 to A12, it can be seen that the aerosol concentrations of the embodiments A5 to A10 are significantly higher than those of the other embodiments. The common feature of these embodiments is that they all have an outer wrapping portion 512 made of aluminum. In addition, the aerosol concentrations of the embodiments A1 to A12 are significantly higher than that of the embodiment A0, indicating that the arrangement of the limiting element 5 at the distal end 4 of the aerosol generating product is beneficial to the enhancement of the aerosol from puff to puff. The best embodiment among A1 to A12 is A8, and the structure of A8 is that the limiting element 5 includes a convex spherical aluminum shell blocking member 52 and an aluminum connecting member 51, and the aluminum connecting member 51 connects the blocking member 52 to the aerosol generating product. The A8 structure has the highest nicotine concentration, while the A10 structure having 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 the blocking member 52 having a convex spherical aluminum shell.
[0078] From the aerosol concentration and nicotine concentration data diagrams of the embodiments B0 to B6, the embodiments B1 to B6 all have higher aerosol concentrations than the embodiment B0, but the increase in aerosol concentration of the embodiments B1 to B6 relative to the embodiment B0 is not as significant as that of the embodiments A1 to A12 relative to the embodiment A0, which is attributed to the fact that the longitudinal cavities 6 of the embodiments B1 to B6 are relatively smaller, and the thermal conductivity of the polyethylene material of the embodiments B1 to B6 is much lower than that of the aluminum material; the B5 structure has the highest aerosol concentration and a lower nicotine concentration; while the B6 and B4 structures have the highest and second highest nicotine concentrations, and the common point of the structures is the design of the barrier 52 with a concave spherical aluminum shell. The highest and second highest in the above description are only used to conveniently indicate the difference between the two concentrations, and do not represent specific values.
[0079] The embodiment of the present application can effectively control the temperature of the aerosol-forming matrix part at the distal end of the aerosol-generating product through the design of the limiting element to promote the upstream aerosol condensation process and prevent the aerosol from escaping outward in a physical barrier manner, which well solves the problem of lateral and axial aerosol escape. At the same time, it also provides the support strength and hardness of the distal end of the aerosol-generating product, improves the effective use rate of the aerosol-generating product, and meets the consistency requirements of consumers using the product. In addition, the limiting element of the embodiment of the present application can play a guiding role, selectively concentrating the aerosol in the center or circumferential part of the aerosol-forming matrix part, so that the aerosol-generating product can adapt to different heating methods of the aerosol transfer device such as the center and the circumference, and improve the satisfaction of consumers using the product.
[0080] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.
Claims
1. An aerosol-generating article for restricting gas flow, comprising an aerosol-forming substrate adapted to generate an inhalable aerosol when heated by an aerosol delivery device, the aerosol-generating article further comprising a plurality of components, the plurality of components being assembled in a tube formed by a packaging material to form a rod-shaped member, the rod-shaped member comprising a nozzle end located downstream of the aerosol-forming substrate and a distal end located upstream of the nozzle end; characterized in that: A limiting element is provided upstream of the aerosol-forming substrate, and the limiting element is connected to the packaging material to increase the inhalation resistance upstream of the aerosol-forming substrate. The limiting element includes a connecting piece connected to the packaging material and a blocking piece connected to the connecting piece, and the minimum distance between the blocking piece and the aerosol-forming substrate is less than or equal to 7 mm.
2. The aerosol generating article for restricting gas flow according to claim 1, characterized in that: A longitudinal cavity is provided between the blocking member and the aerosol-forming substrate, and the volume of the longitudinal cavity is less than or equal to the volume of a flow channel formed by the packaged material upstream of the aerosol-forming substrate.
3. The aerosol generating article for restricting gas flow according to claim 2, characterized in that: The connecting member includes an outer wrapping portion attached to the outer peripheral side of the packaging, and the outer wrapping portion extends to the outer peripheral side of the aerosol-forming substrate.
4. The aerosol generating article for restricting gas flow according to claim 3, characterized in that: The connecting member further comprises a bending portion surrounding the end surface of the tube body formed by the packaging object, and the blocking member is connected to the bending portion and is at least partially located in the tube body formed by the packaging object.
5. An aerosol generating article for restricting gas flow according to claim 2 or 3, characterized in that: The connecting member further comprises an inner supporting portion connected to the blocking member, and the inner supporting portion is accommodated in a tube body formed by the packaging object.
6. The aerosol generating article for restricting gas flow according to claim 5, characterized in that: The connecting member also includes an outer wrapping portion connected to the inner supporting portion, a gap is formed between the inner supporting portion and the outer wrapping portion, and the distal end of the packaging object is at least partially embedded in the gap.
7. The aerosol generating article for restricting gas flow according to claim 5, characterized in that: The barrier is convex and / or concave in the direction of the aerosol-forming substrate.
8. The aerosol generating article for restricting gas flow according to claim 6, characterized in that: The barrier has one or more ventilation holes, and the barrier has a resistance to draw (RTD) H2O of less than 70 mm.
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 100m•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 member is less than 500 mm 4 .
Citation Information
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Aerosol-generating article for restricting gas flow
WO2026148731A1