Aerosol generating product

Abstract

The aerosol generating product comprises a filter tip part and a fuming part, an aerosol generating base body is arranged in the fuming part, and the filter tip part comprises a supporting section, a cooling section and a solid core section. The supporting section is connected to the downstream end of the fuming part, and the supporting section is a first cavity section which is through in the axial direction; the cooling section is arranged at the downstream end of the supporting section, a groove filter stick is arranged in the cooling section, an axially-through groove channel is formed in the circumferential outer surface of the groove filter stick, the groove channel is sunken towards the interior of the groove filter stick from the circumferential outer surface of the groove filter stick in the thickness direction, one end of the groove channel is communicated with the first cavity section, and the other end of the groove channel is communicated with the second cavity section. The concave depth of the groove channel is larger than the wall thickness of the first cavity section, and the thickness direction is located on the cross section of the aerosol generating product and is perpendicular to the axial direction. The solid core section is arranged at the downstream end of the cooling section and communicates with the other end of the groove channel. The aerosol generating product provided by the invention has proper aerosol temperature and suction experience, and is simple in structure and process and low in cost.

Description

Technical Field

[0001] The invention belongs to the field of heated cigarettes, and in particular relates to an aerosol generating product. Background Art

[0002] In recent years, new tobacco products have rapidly emerged with their low health hazard properties, attracting a large number of consumers, especially heated cigarettes that are smoked by heating without burning. Because they are similar to traditional cigarettes and can effectively reduce the harm caused by smoking, the consumer market is growing. After several years of development and optimization, this aerosol-generating product has initially achieved a good smoking experience, but at the same time there are certain problems. For example, the smoke temperature of aerosol-generating products is too high. The high aerosol temperature will cause oral irritation and burning sensation, thereby reducing the consumer's smoking experience.

[0003] How to reduce the aerosol temperature of aerosol-generating products to a palatable temperature?

[0004] Patent CN 104010531 B discloses an aerosol-generating article, which includes an aerosol-cooling element, which is arranged downstream of a supporting element and includes a biodegradable polymer material sheet such as a gathered polylactic acid sheet. The aerosol-cooling element can cool the temperature of the aerosol stream by undergoing a phase change, which consumes heat energy from the aerosol stream, thereby reducing the temperature of the aerosol of the aerosol-generating article. The endothermic phase change process may include melting or glass transition, etc.

[0005] For another example, patent CN 111184270 B discloses a heating cigarette cooling fixture and a heating cigarette. The cooling fixture comprises an outer tube, a frame and a cooling auxiliary part, the frame is arranged inside the outer tube and divides the inner part of the outer tube into at least two through channels extending along the length direction of the outer tube, and at least one channel is provided with a cooling auxiliary part extending along the length direction of the outer tube. The raw material for preparing the cooling fixture is a polymer composite material, including a polymer matrix material, a phase change material and a heat conductive material.

[0006] For another example, patent CN 218418385 U discloses a cooling device and HNB cigarettes, which are applied to HNB cigarettes and are arranged between the heated tobacco segment and the filter rod of the HNB cigarettes, and include: a cylindrical structure connected to the heated tobacco segment at one end and the filter rod at the other end; a plurality of spoilers are arranged in the cylindrical structure, and each spoiler is at least a curved surface convex to the direction of the smoke flow on the surface facing the smoke flow direction, so that the smoke flows along the curved surface of the spoiler toward the filter rod. The HNB cigarettes in this patent are cooled mainly by lengthening the smoke flow path and increasing the smoke turbulence, and the internal structure of the filter is very complex.

[0007] The above patents mainly use cooling materials or complex cooling structures to achieve aerosol cooling of aerosol-generating products. The cost of using cooling materials such as polylactic acid is relatively high and requires additional production processes, which to a certain extent limits the development of aerosol-generating products; while using cooling structures to cool down, in order to achieve the ideal cooling effect, the cooling structure will be designed to be more complex, and functional materials such as phase change materials and thermal conductive materials will be used as auxiliary materials, which is not advantageous in terms of process and cost. Summary of the invention

[0008] In view of the above problems, the present invention provides an aerosol generating product, which can solve the problems of high aerosol temperature in existing aerosol generating products and complex structure or process and increased production cost in the method of reducing aerosol temperature.

[0009] The technical solution of the present invention to solve the above technical problems is as follows: an aerosol generating product, comprising a filter part and a smoking part, wherein an aerosol generating substrate for generating aerosol is provided in the smoking part, and the filter part comprises:

[0010] A support section connected to the downstream end of the smoke generating section, wherein the support section is a first cavity section that penetrates axially;

[0011] a cooling section, arranged at the downstream end of the supporting section, wherein a groove filter rod is arranged in the cooling section, wherein an axially penetrating groove channel is arranged on the circumferential outer surface of the groove filter rod, wherein the groove channel is recessed from the circumferential outer surface of the groove filter rod toward the inside of the groove filter rod along the thickness direction, wherein one end of the groove channel is connected to the first cavity section, and the recessed depth of the groove channel is greater than the wall thickness of the first cavity section, wherein the thickness direction is located on the cross section of the aerosol generating product and is perpendicular to the axial direction;

[0012] The solid core section is arranged at the downstream end of the temperature reduction section and is communicated with the other end of the groove channel.

[0013] By adopting the above technical solution, the aerosol generating product of the present invention can reduce the aerosol temperature without affecting the smoking experience, and has a simple structure and process and low cost.

[0014] The cross-section of the aerosol generating article in the present invention along the thickness direction can be various shapes for practical use, such as circular, elliptical, polygonal such as square and other irregular shapes. When the cross-section of the aerosol generating article along the thickness direction is circular, the thickness direction is the radial direction.

[0015] The present invention is further configured such that the depression depth of the groove channel and the wall thickness of the first cavity section satisfy the following conditions:

[0016] D2 / D1≥1.2

[0017] Wherein, D1 is the wall thickness of the first cavity section, and D2 is the recessed depth of the groove channel.

[0018] The present invention is further configured such that the length of the support section, the length of the cooling section, the length of the solid core section and the total length of the filter portion meet the following conditions:

[0019] 0.15≤L3 / L≤0.4, 0.2≤L2 / L≤0.6

[0020] Among them, L1 is the length of the supporting section, L2 is the length of the cooling section, L3 is the length of the solid core section, and L is the total length of the filter part L=L1+L2+L3.

[0021] The present invention is further configured such that the length of the groove filter rod and the total length of the filter portion satisfy the following conditions:

[0022] 0.15≤L4 / L≤0.5

[0023] Among them, L4 is the length of the groove filter rod, and L is the total length of the filter tip, that is, the sum of the support section length, the cooling section length and the solid core section length.

[0024] The present invention is further configured such that the groove channel cross-section is an open bowl-shaped groove, the bowl-shaped groove includes a bottom edge and two side edges, the bottom edge is a straight edge, the two side edges constitute a symmetrical outward expansion structure, and the bottom edge and the two side edges are connected by rounded corners.

[0025] The present invention is further configured such that the angle between the bottom edge and the side edge is 100-130°.

[0026] The present invention is further configured such that the number of the groove channels is 4 to 8, the depression depth is 1 to 3 mm, and the width is 1 to 2 mm. The depth of the groove channel in the present invention refers to the average value of the depression depth of all the groove channels on the cross section along the thickness direction of the groove filter rod, and the width of the groove channel refers to the average value of the width of the peripheral notch of all the groove channels on the cross section along the thickness direction of the groove filter rod.

[0027] The present invention is further configured such that the total length of the filter portion is 30 to 60 mm, the length of the smoking portion is 10 to 45 mm, and the total length of the filter portion is the sum of the lengths of the support section, the cooling section and the solid core section.

[0028] The present invention is further configured such that the cooling section also includes a second cavity section axially located between the first cavity section and the groove filter rod, the two ends of the second cavity section are respectively connected to the first cavity section and the groove filter rod, and the wall thickness of the second cavity section is smaller than the wall thickness of the first cavity section.

[0029] The present invention is further configured such that the wall thickness of the first cavity section and the wall thickness of the second cavity section meet the following conditions:

[0030] D3D1<0.8

[0031] Wherein, D1 is the wall thickness of the first cavity segment, and D3 is the wall thickness of the second cavity segment.

[0032] The present invention is further configured such that the wall thickness of the first cavity section is 0.2-2.5 mm, and the wall thickness of the second cavity section is 0.1-2.0 mm.

[0033] The present invention is further configured such that the outer peripheral wall of the second cavity segment is provided with ventilation holes communicating with the interior thereof, the diameter of the ventilation holes is D0, D0 satisfies: 0.1 mm≤D0≤0.5 mm, and the number of the ventilation holes is ≤10.

[0034] The present invention is further configured such that the cooling section is also provided with wrapping paper wrapped around the outer periphery of the groove filter rod, the wrapping paper is provided with a ventilation area connected to the groove channel, the ventilation area is provided with ventilation holes, the pore diameter of which is 10μm≤≤50μm.

[0035] The present invention is further configured such that the ventilation rate of the filter portion is ≤30%. Preferably, the ventilation rate of the filter portion is 5%≤25%.

[0036] The aerosol generating product of the present invention is provided with a smoking section, a supporting section, a cooling section and a solid core section in sequence from the upstream end to the downstream end, wherein a groove filter rod is provided in the cooling section, and an axially through groove channel is provided on the circumferential outer surface of the groove filter rod. The smoke is guided to the groove channel, and the heat exchange process between the smoke and the external environment through the wrapping paper is strengthened to cool the smoke. When the cooling purpose is achieved, the airflow path is not increased, and the filter tip structure is simple. The aerosol generating product of the present invention achieves a good cooling effect, and at the same time has a small aerosol interception effect, so that the aerosol temperature finally reaching the mouth is suitable and the suction taste is good. Further providing a second cavity section in the cooling section can further reduce aerosol interception and increase the outlet aerosol content.

[0037] The present invention further defines the length ratio of each structure part, the wall thickness, the number, shape, depth and width of the groove channels, and the ventilation rate of the filter portion, so as to further optimize the aerosol generating product of the present invention and make it have better comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The structural schematic diagram of sample 1 is shown;

[0039] Figure 2 A schematic cross-sectional view of a grooved filter rod is shown;

[0040] Figure 3 The structural schematic diagrams of samples 2 and 3 are shown;

[0041] Figure 4 Shown is a schematic structural diagram of control sample 1;

[0042] Figure 5 A schematic diagram of the structure of sample 4 is shown;

[0043] Figure 6 The structural schematic diagrams of Sample 5 and Sample 6 are shown.

[0044] Among them, 1. Smoke-generating section; 2. Support section; 2-1. First cavity section; 3. Grooved filter rod; 3-1. Grooved channel; 3-11. Bottom edge; 3-12. Side edge; 3-13. Rounded corner; 4. Breathable area; 5. Second cavity section; 6. Ventilation hole; 7. Solid core section; 8. Small cavity filter rod; 9. Large cavity filter rod. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The appropriate aerosol outlet temperature is a prerequisite for a good puffing experience. Generally, the temperature reaching the mouth is ≤60℃, which is more suitable. Under the premise of having a suitable temperature, ensuring the aerosol content can satisfy both good taste and satisfaction.

[0047] As some embodiments of the present invention, see Figure 1 The aerosol generating product of the present invention comprises a filter portion and a smoking portion 1, wherein the smoking portion 1 is provided with an aerosol generating substrate for generating aerosol, and the filter portion comprises:

[0048] The support section 2 is connected to the downstream end of the smoke generating section 1, and the support section 2 is an axially penetrating first cavity section 2-1.

[0049] The cooling section is arranged at the downstream end of the supporting section 2. A groove filter rod 3 is arranged in the cooling section. An axially penetrating groove channel 3-1 is arranged on the circumferential outer surface of the groove filter rod 3. The groove channel 3-1 is recessed from the circumferential outer surface of the groove filter rod 3 toward the inside of the groove filter rod 3 along the thickness direction. One end of the groove channel 3-1 is connected to the first cavity section 2-1. The recessed depth of the groove channel 3-1 is greater than the wall thickness of the first cavity section 2-1, which is conducive to the smooth entry of the airflow from the first cavity section 2-1 into the groove channel 3-1. In this embodiment, the axial direction is the axial direction of the aerosol generating product, that is, the axial direction of the filter portion and the smoking portion 1. Figure 1 The x direction in the circumferential direction is as follows Figure 2 The thickness direction is the direction on the cross section of the aerosol-generating article and is perpendicular to the axial direction. The thickness direction may be the width or height direction of the aerosol-generating article. When the aerosol-generating article is cylindrical, the thickness direction is the radial direction.

[0050] The solid section 7 is arranged at the downstream end of the temperature-lowering section and is connected to the other end of the groove channel 3 - 1 .

[0051] With the above-mentioned technical solution, the support section 2 uses a cavity structure, which mainly supports the tobacco material in the smoking section 1 when it is subjected to external force to prevent it from axial movement. The cooling section uses a grooved filter rod 3, which can achieve a good cooling effect. Moreover, some groove channels 3-1 are arranged on the periphery of the grooved filter rod 3 to form a gear-like cross-sectional structure, which is used to guide the aerosol to the groove, and can avoid the problem of excessive aerosol interception when the aerosol passes through the solid filter material of the filter rod. In addition, the groove channels 3-1 are arranged on the periphery of the grooved filter rod 3, which is more conducive to the heat exchange between the aerosol with a higher temperature and the external environment through the wrapping paper, and the heat is conducted to the outside world. Therefore, the above-mentioned technical solution not only achieves a good cooling effect, but also has a smaller aerosol interception effect, so that the aerosol temperature finally reaching the mouth is suitable and the suction taste is good.

[0052] The smoking part 1 in the present invention is the part of the aerosol generating product that provides the aerosol generating matrix, so that consumers can get satisfaction and pleasure when smoking. The aerosol generating matrix includes tobacco raw materials, such as tobacco shreds, thin slices, tobacco particles, fragments, powders, etc., which can be prepared by traditional processes or by thick pulp method, papermaking method, rolling method, dry method, etc. The aerosol generating matrix can also include substances such as flavors and fragrances and other auxiliary materials.

[0053] The material of the filter portion in the present invention includes one or more of acetate fiber bundles, polypropylene fiber bundles, polylactic acid bundles, paper and other polymers.

[0054] Optionally, the interior of the groove filter rod 3 in the present invention may be a solid structure or a hollow structure. For the groove filter rod 3 with a solid structure, the aerosol can be directed to the groove channel 3-1 to enhance the heat exchange between the aerosol and the external environment; for the groove filter rod 3 with a hollow structure, the cooling section entity volume is relatively small, the aerosol circulation channel is relatively large and the airflow resistance is small, which can reduce the interception of aerosol by the cooling section entity part.

[0055] The solid segment 7 in the present invention is a solid filter rod structure, which can filter out harmful substances in the aerosol to a certain extent and reduce its harm to consumers. At the same time, after intercepting part of the aerosol, it can further reduce the temperature of the aerosol when entering the consumer's mouth, thereby improving the comfort of smoking. On the other hand, the interception effect of the solid segment 7 on the aerosol can also be reduced. For example, by using high single denier and low total denier tow to make the solid segment, the pressure drop of the solid segment filter rod can be reduced, the aerosol interception can be reduced, and a certain amount of tobacco substances can be delivered to the consumer, thereby improving the consumer's smoking satisfaction.

[0056] Optionally, the connection between the support section 2, the cooling section and the solid core section 7 of the present invention may be a separate connection or an integral connection.

[0057] The present invention is further configured such that the depression depth of the groove channel 3-1 and the wall thickness of the first cavity section 2-1 satisfy the following conditions:

[0058] D2 / D1≥1.2

[0059] Wherein, D1 is the wall thickness of the first cavity section 2-1, and D2 is the recessed depth of the groove channel 3-1. The above preferred technical solution actually defines the channel at the junction of the groove channel 3-1 and the first cavity section 2-1. The larger the value of D2 / D1, the larger the channel at the junction of the groove channel 3-1 and the first cavity section 2-1, the more the aerosol flow rate through the junction is reduced, and the smaller the airflow interception effect is. Therefore, more preferably, D2 / D1≥1.5.

[0060] The present invention is further configured such that the length of the support section 2, the length of the cooling section, the length of the solid core section 7 and the total length of the filter portion meet the following conditions:

[0061] 0.15≤L3 / L≤0.4, 0.2≤L2 / L≤0.6

[0062] Among them, L1 is the length of the support section 2, L2 is the length of the cooling section, L3 is the length of the solid core section 7, and L is the total length of the filter part L=L1+L2+L3.

[0063] By adopting the above technical solution, suitable L3 / L and L2 / L, and controlling the ratio of each section, the cooling capacity of the filter can be improved and the aerosol retention amount can be reduced.

[0064] The present invention is further configured such that the length of the groove filter rod 3 and the total length of the filter portion meet the following conditions:

[0065] 0.15≤L4 / L≤0.5

[0066] Among them, L4 is the length of the groove filter rod 3, and L is the total length of the filter tip, that is, the sum of the length of the support section 2, the length of the cooling section and the length of the solid core section 7.

[0067] By adopting the above technical solution, the length of the groove filter rod 3 is controlled not to be too long, which can reduce the interception effect of the groove filter rod 3 on the aerosol and ensure that the aerosol generating product has a relatively satisfactory aerosol amount.

[0068] In some embodiments of the present invention, see Figure 2 The cross section of the groove channel 3-1 is an open bowl-shaped groove, which includes a bottom edge 3-11 and two side edges 3-12. The bottom edge 3-11 is a straight edge, and the two side edges 3-12 form a symmetrical outward expansion structure. The bottom edge 3-11 and the two side edges 3-12 are connected by rounded corners 3-13.

[0069] By adopting the above technical solution, the groove filter rod 3 is set to a special shape, which promotes the heat exchange between the aerosol airflow and the external environment to a certain extent, thereby improving the cooling effect and minimizing the interception effect of the surrounding wall of the airflow channel.

[0070] like Figure 2 As shown, specifically, the groove channel 3-1 is provided with a bottom edge 3-11 as a straight edge and two outwardly expanded side edges 3-12, which can expand the volume of the groove channel 3-1 as much as possible to reduce the aerosol flow rate and reduce interception, and also expand the contact area between the aerosol and the peripheral wall filter material, thereby increasing the cooling effect of the groove filter rod 3. The two side edges 3-12 are connected to the bottom edge 3-11 through fillets 3-13 to achieve a smooth, continuous and gentle transition between the side edges 3-12 and the bottom edge 3-11, that is, the connection between the two side edges 3-12 and the bottom edge 3-11 is a curved surface, and the bottom and side surfaces of the groove channel 3-1 are a continuous curved surface, which can avoid the problem that the airflow generated by the connection of the bottom edge 3-11 and the side edges 3-12 through the plane angle connection has a significant interception effect at the angle connection, and the problem that the aerosol is easily accumulated at the plane angle connection.

[0071] See also Figure 2 , the angle between the bottom edge 3-11 and the side edge 3-12 is further set to 100-130°( Figure 2 in P).

[0072] By adopting the above technical solution, the appropriate angle between the bottom edge 3-11 and the side edge 3-12 can ensure the contact area between the wall material of the groove channel 3-1 and the aerosol, that is, the cooling area of ​​the aerosol, while ensuring the cross-sectional size of the groove filter rod 3 and ensuring that the airflow velocity is not too large, thereby reducing the interception effect.

[0073] The present invention is further configured such that the number of the groove channels 3 - 1 is 4 to 8, the depth of the depression is 1 to 3 mm, and the width is 1 to 2 mm.

[0074] The above technical solution limits the number, depression depth and width of the groove channels 3 - 1 , so that the groove filter rod 3 has a better cooling effect and a smaller interception effect.

[0075] The present invention is further configured such that the total length of the filter portion is 30 to 60 mm, the length of the smoking portion 1 is 10 to 45 mm, and the total length of the filter portion is the sum of the lengths of the support section 2 , the cooling section and the solid core section 7 .

[0076] In some embodiments of the present invention, see Figure 3 The cooling section also includes a second cavity section 5 axially located between the first cavity section 2-1 and the groove filter rod 3. The two ends of the second cavity section 5 are respectively connected to the first cavity section 2-1 and the groove filter rod 3. The wall thickness of the second cavity section 5 is smaller than the wall thickness of the first cavity section 2-1.

[0077] By adopting the above technical solution, a smoke generating part 1, a first cavity section 2-1, a second cavity section 5, a groove filter rod 3, and a solid section 7 are sequentially arranged from the upstream end to the downstream end. When the smoke generating part 1 generates an aerosol airflow, the airflow flows from the first cavity section 2-1 to the second cavity section 5 under the effect of suction. Since the cross-sectional area of ​​the hollow part of the second cavity section 5 is larger than the cross-sectional area of ​​the hollow part of the first cavity, that is, the radial dimension of the second cavity section 5 is larger than the first cavity section 2-1. The airflow flows rapidly through the first cavity section 2-1. Since the diameter of the second cavity section 5 suddenly increases, the airflow with a relatively high flow rate decelerates rapidly when entering the second cavity section 5, so that the flow rate entering the groove channel 3-1 will also be relatively reduced, thereby weakening the impact of the aerosol airflow on the second cavity section 5 and the wall material of the groove channel 3-1, and reducing the airflow interception amount. This avoids the problem that the airflow channel at the junction where the first cavity section 2-1 and the groove filter rod 3 are in direct contact is too small, the airflow velocity is too large, and the impact force on the wall material of the groove channel 3-1 is large, causing excessive interception. At the same time, since the wall thickness of the second cavity section 5 is less than the wall thickness of the first cavity section 2-1, the thinner wall thickness helps the aerosol to fully exchange heat with the external environment through the second cavity section 5, reducing the aerosol temperature, so that the second cavity section 5 also has a further cooling effect.

[0078] The present invention is further configured such that the wall thickness of the first cavity section 2-1 and the wall thickness of the second cavity section 5 meet the following conditions:

[0079] D3D1<0.8

[0080] Wherein, D1 is the wall thickness of the first cavity segment 2 - 1 , and D3 is the wall thickness of the second cavity segment 5 .

[0081] By adopting the above technical solution, under the premise of ensuring that the second cavity section 5 has a good supporting effect, the wall thickness of the second cavity section 5 is set as small as possible, which can reduce the interception effect as much as possible.

[0082] The present invention is further configured such that the wall thickness of the first cavity section 2 - 1 is 0.2 to 2.5 mm, and the wall thickness of the second cavity section 5 is 0.1 to 2.0 mm.

[0083] By adopting the above-mentioned technical solution, the wall thickness of the first cavity section 2-1 is limited to provide support for the smoking section 1, so as to ensure that the aerosol components generated by the smoking section 1 can smoothly enter the first cavity section 2-1 without relative movement of the tobacco material, thereby reducing the interception of the aerosol components by the wall material of the support section 2. At the same time, the thinner wall thickness also helps the aerosol to exchange heat with the external environment through the wall material of the support section 2, thereby reducing the aerosol temperature. Limiting the wall thickness of the second cavity section 5 can not only ensure a smaller interception effect, but also enable the aerosol to exchange heat with the external environment through the thinner wall thickness, thereby improving the cooling effect. The sudden change in wall thickness from the first cavity section 2-1 to the second cavity section 5 also causes turbulence in the aerosol, which to a certain extent promotes the cooling effect of the aerosol.

[0084] In some embodiments of the present invention, ventilation holes 6 communicating with the interior of the second cavity segment 5 are provided on its outer periphery, the diameter of the ventilation holes 6 is D0, D0 satisfies: 0.1mm≤D0≤0.5mm, and the number of the ventilation holes 6 is ≤10.

[0085] By adopting the above-mentioned technical solution, external airflow is introduced by setting the ventilation holes 6, which promotes the fusion of aerosol and external air, so that the cooling effect is further improved. When the external cold air enters the second cavity section 5 under the suction negative pressure, due to the small diameter of the ventilation holes 6 and the corresponding high air flow rate, the air flow and aerosol flow entering the second cavity section 5 from different directions form a mutual impact, converge at the center of the second cavity section 5 to form an impact mainstream and extend to the periphery. The impact mainstream compresses the high-temperature aerosol toward the radial periphery and guides it to the downstream groove channel 3-1. On the one hand, it can promote the heat exchange between the high-temperature aerosol and the external environment to increase the cooling effect. On the other hand, it prevents too much aerosol from entering the dense solid part of the groove filter rod 3 and reduces the retention of aerosol by the groove filter rod 3.

[0086] In some embodiments of the present invention, the cooling section is further provided with wrapping paper, which is wrapped around the outer periphery of the groove filter rod 3. The wrapping paper is provided with a ventilation area 4 connected to the groove channel 3-1. The ventilation area 4 is provided with ventilation holes with a pore size of 10μm≤≤50μm.

[0087] By adopting the above technical solution, the wrapping paper is provided with a ventilation area 4, and multiple ventilation holes are opened in the ventilation area 4 to introduce external air, thereby effectively reducing the aerosol temperature. The aerosol flowing from the groove channel 3-1 passes through the ventilation area 4 to exchange heat with the external air more directly and fully.

[0088] Preferably, the air permeable area 4 is evenly arranged at the groove channel 3-1 of the outer peripheral wall of the groove filter rod 3, so that the aerosol heat exchange is more uniform and sufficient. More preferably, the air permeable area 4 surrounds and wraps the groove filter rod 3, and the air permeable holes are evenly distributed on the surface of each groove channel 3-1 covered.

[0089] The present invention is further configured such that the ventilation rate of the filter portion is ≤30%, and the ventilation rate of the filter portion is measured by the test method in GB / T22838.15. By adopting the above technical solution, the air intake of the filter portion of the entire aerosol generating product is controlled, so that the aerosol can achieve a better cooling effect while ensuring the aerosol concentration, and avoid the problem of excessive dilution of the aerosol caused by the excessive ventilation rate of the filter portion. Preferably, the ventilation rate of the filter portion is 5%≤≤25%.

[0090] The features and performance of the present invention are further described in detail below in conjunction with specific embodiments.

[0091] In order to facilitate the comparison between samples, the diameter of the aerosol generating products of all samples and control samples in the following embodiments is set to be the same, which is 7.2 mm. The solid core segment 7, groove filter rod 3, and support segment 2 of all samples in the embodiments are made of acetate fiber bundles, and the second cavity segment 5 is made of paper tubes. The large cavity filter rod 9 and the small cavity filter rod 8 in the control sample 1 are made of acetate fiber bundles. The same aerosol generating matrix is ​​used in each embodiment, and it is a thin sheet of filaments containing 20wt% glycerol.

[0092] Example 1

[0093] The structure of sample 1 is as follows Figure 1 As shown, from downstream to upstream are the solid section 7, the cooling section (the groove filter rod 3), the support section 2 (the first cavity section 2-1) and the smoking section 1, the lengths of each section are 9 mm (L3), 12 mm (L2), 12 mm (L1) and 13 mm respectively, the wall thickness of the support section 2 is 0.9 mm (D1), and the solid section 7, the groove filter rod 3 and the support section 2 constitute the filter tip section.

[0094] like Figure 2 As shown, the groove filter rod 3 of sample 1 is a non-hollow structure, the number of groove channels 3-1 is 6, the depression depth (D2) is 1.6 mm, and the groove width (W) is 1.4 mm.

[0095] The structure of sample 2 is as follows Figure 3 As shown, from downstream to upstream are the solid section 7, the cooling section (groove filter rod 3 + second cavity section 5), the support section 2 (first cavity section 2-1) and the smoking section 1, and the lengths of each section are 9mm (L3), 16mm (12mm+4mm), 8mm (L1) and 13mm respectively, of which 16mm corresponds to L2, 12mm is the length of the groove filter rod 3, 4mm is the length of the second cavity section 5, the wall thickness (D1) of the support section 2 is 0.9mm, and the wall thickness (D3) of the second cavity section 5 is 0.2mm.

[0096] The solid core segment 7, the groove filter rod 3, the second cavity segment 5 and the cavity filter rod in sample 2 constitute the filter portion. The groove filter rod 3 is a non-hollow structure with 6 grooves, a depression depth of 1.6 mm and a groove width of 1.4 mm.

[0097] The structure of control sample 1 is as follows Figure 4 As shown, from downstream to upstream, there are solid core section 7, cooling section (large cavity filter rod 9), support section (small cavity filter rod 8) and smoke generating section 1, the lengths of each section are 8mm, 18mm, 7mm and 13mm, the wall thickness of support section 2 is 1.4mm, and the wall thickness of cooling section is 0.9mm. Control sample 1 is not perforated.

[0098] The ventilation rate of the filter portion of Samples 1-2 and Control Sample 1 was 0.

[0099] Suction test and effect comparison

[0100] The above-mentioned aerosol generating products are used in conjunction with heating devices. When comparing the effects of aerosol generating product samples, in order to ensure the consistency of the smoking conditions, a smoking machine is used and tested under certain parameter conditions. One of the smoking methods is listed below, specifically: the above-mentioned aerosol generating products are placed in the same heating device for smoking, and the smoking machine parameters are set (such as bell wave smoking, the smoking scheme is the Canadian deep smoking method, and the smoking capacity is 55mL). The heating device is pressed for 2.4s, and the first puff is started after an interval of 14.6s. Each puff is puffed for 2s, and the next puff is puffed after an interval of 28 seconds. After the 8th puff, the capture is terminated, and 8 puffs of aerosol are captured for each cigarette. Among them, the heating method of the heating device includes but is not limited to the use of electric heating, electromagnetic heating and infrared heating. After the heating temperature is stabilized, it is controlled at about 340°C. Then the captured aerosol capture content and nicotine content are obtained. All liquid or solid particles that can be captured in the smoke are called aerosol captures.

[0101] In order to compare the temperature perception of consumers when inhaling aerosol generating products, a thermocouple temperature measurement method was used to fix the thermocouple at a distance of 1 mm from the center of the outlet of the solid core section 7 of the aerosol generating product. The thermocouple was connected to a temperature data acquisition system to measure the temperature of the aerosol at the outlet of the mouth end of the aerosol generating product when inhaling.

[0102] The above test method was used to compare the effects of several samples, and the results are shown in the following table:

[0103] Table 1 Comparison of test results of samples 1-2 and control sample 1

[0104]

[0105] It can be seen from Table 1 that sample 1 uses a grooved filter rod 3 with a peripheral wall guide function as a cooling section, which effectively reduces the aerosol temperature and reduces the outlet temperature to 55.3°C, which is a suitable temperature for inhalation. At the same time, it also ensures a high aerosol capture amount and satisfies the taste experience.

[0106] Sample 2 introduces a second cavity section 5 on the basis of the cooling section of the filter rod 3 with the guide grooves on the peripheral wall, so that the interception effect of the filter tip on the aerosol is weakened, the content of the captured aerosol is increased, especially the nicotine content is significantly improved. The amount of aerosol coming out is increased, the total heat carried is high, and the temperature will also rise slightly. The actual outlet temperature of Sample 2 drops to 60.3°C, which is a suitable temperature for smoking. While ensuring the cooling effect of the aerosol, Sample 2 has a better overall smoking taste than Sample 1.

[0107] The cooling section and supporting section 2 of control sample 1 are a combination of large and small cavities, which results in less obstruction in the aerosol channel, relatively less aerosol retention during inhalation, and relatively more aerosol content. However, this also causes the temperature of the aerosol at the outlet to be higher (the outlet temperature is as high as 75.2°C, 15°C higher than that of sample 2). Too high a temperature may cause excessive stimulation and damage to the oral mucosa, resulting in a poor sensory experience for consumers when inhaling.

[0108] Through the comparison of the above data, it can be seen that the sample using the characteristics of Example 1 of this patent ensures a high aerosol capture amount under the premise that the aerosol temperature drops to an appropriate temperature, so that the overall puffing experience is good.

[0109] Example 2

[0110] The structure of sample 3 is as follows Figure 3 As shown, from downstream to upstream, there are solid core section 7, cooling section (groove filter rod 3 + second cavity section 5), support section 2 (cavity filter rod) and smoke section 1, and the lengths of each section are 9mm, 10mm (6mm+4mm), 14mm and 13mm respectively. The wall thickness of support section 2 is 0.9mm, and the wall thickness of second cavity section 5 is 0.2mm. The other features of sample 3 are consistent with sample 2. The ventilation rate of the filter tip of sample 3 is 0.

[0111] The structure of sample 4 is as follows Figure 5 As shown, a punching operation is performed in the second cavity segment 5 with a hole diameter of 0.2 mm and a total of 3 holes, so that the ventilation rate of the filter portion reaches 22%. Other characteristics are consistent with sample 3.

[0112] Suction test and effect comparison

[0113] The puff test process was the same as that of Example 1. The two samples in Example 2 were compared with Sample 2 to compare the aerosol content and the aerosol outlet temperature. The results are shown in Table 2.

[0114] Table 2 Comparison of test results of samples 2-4

[0115] name Aerosol capture amount (mg / piece) Nicotine (mg / stick) Outlet temperature(℃) Sample 2 26.5 0.52 60.3 Sample 3 25.8 0.52 59.5 Sample 4 27.7 0.61 54.0

[0116] From the structural parameters of samples 2-4, it can be seen that the total length, the length of the smoking section 1 and the length of the solid core section 7 of the above-mentioned samples 3 and 2 are the same. The total length of the cooling section and the supporting section 2 of samples 3 and 2 is the same, but the lengths of the groove filter rod 3, the second cavity section 5 and the first cavity section 2-1 that constitute the cooling section and the supporting section 2 are different. After the internal structure of the filter tip of sample 3 is adjusted relative to sample 2, the aerosol capture and nicotine content and the aerosol outlet temperature do not change much. After the second cavity section 5 of sample 4 is perforated, the aerosol capture and nicotine content increase significantly, and the aerosol temperature also decreases further, and the overall smoking effect is very good.

[0117] Example 3

[0118] The structure of sample 5 is as follows Figure 6 As shown, based on Sample 2, Sample 5 wraps a breathable wrapping paper in the middle of the groove filter rod 3 to form an annular breathable area 4 with a width of 1 mm in the axial direction, so that the ventilation rate of the filter tip reaches 18%. Other characteristics remain consistent with Sample 2.

[0119] The structure of sample 6 is as follows Figure 6 As shown, based on Sample 2, Sample 6 wraps a breathable wrapping paper in the middle of the groove filter rod 3 to form an annular breathable area 4 with a width of 3 mm in the axial direction, so that the ventilation rate of the filter tip reaches 34%. Other characteristics remain consistent with Sample 2.

[0120] Suction test and effect comparison

[0121] The puff test process is the same as in Example 1. The two samples in Example 3 were compared with Sample 2 to compare the aerosol content and aerosol outlet temperature. The results are as follows:

[0122] Table 2 Comparison of test results of samples 2, 5-6

[0123] name Aerosol capture amount (mg / piece) Nicotine (mg / stick) Outlet temperature(℃) Sample 2 26.5 0.52 60.3 Sample 5 21.5 0.50 56.6 Sample 6 16.1 0.38 45.7

[0124] By comparison, it can be found that Sample 5 and Sample 6 introduce external air by setting a breathable area 4 on the outside of the groove filter rod 3, and the ventilation rates of the filter tip reach 18% and 34% respectively. Compared with Sample 2, Sample 5 can further reduce the aerosol temperature while keeping the aerosol content unchanged. However, after Sample 6 further increases the ventilation rate of the filter tip, although the aerosol temperature continues to drop, the aerosol content drops significantly, the aerosol concentration is over-diluted, and there is a sense of empty suction when inhaling, which reduces the suction experience.

[0125] Among all the above samples, the smoke outlet temperatures of samples 1-6 are more suitable, and the aerosol content released by samples 1-2 is also more suitable, which can meet the user's smoking needs. Among them, sample 4 has the best comprehensive performance, with a smoke outlet temperature of 54°C, an aerosol capture amount of 27.7 mg / stick, and a nicotine capture amount of 0.61 mg / stick. Sample 5 also adopts the method of increasing ventilation, but the outlet temperature is higher than that of sample 4, and the aerosol capture amount and nicotine capture amount are both lower than sample 4. The reason for this difference is that sample 4 adopts a perforated air intake method. After the external cold air enters the second cavity section 5 from the ventilation hole 6, the airflow is relatively fierce. The cold air will mainly occupy the central area of ​​the second cavity section 5, and the relatively hot aerosol will be squeezed to the surrounding wall part, which just allows the aerosol to smoothly enter the groove channel 3-1 of the groove filter rod 3, reducing interception. Sample 5 uses the method of wrapping breathable paper around the groove filter rod 3 for air intake. Due to the smaller pore size and more holes, the air enters evenly and softly. After the external cold air enters the groove filter rod 3, it will be distributed more near the surrounding wall, and part of the aerosol will be expelled to the inside (that is, on the filter material of the groove filter rod), resulting in more interception. Compared with sample 4, although the method of sample 5 has better cooling, it also has relatively more interception, and as the ventilation rate of the filter tip increases, the interception will further increase.

[0126] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aerosol generating product, characterized in that The invention comprises a filter part and a smoking part, wherein the smoking part is provided with an aerosol generating matrix for generating aerosol, and the filter part comprises: A support section connected to the downstream end of the smoke generating section, wherein the support section is a first cavity section that penetrates axially; a cooling section, arranged at the downstream end of the supporting section, wherein a groove filter rod is arranged in the cooling section, wherein an axially penetrating groove channel is arranged on the circumferential outer surface of the groove filter rod, wherein the groove channel is recessed from the circumferential outer surface of the groove filter rod toward the inside of the groove filter rod along the thickness direction, wherein one end of the groove channel is connected to the first cavity section, and the recessed depth of the groove channel is greater than the wall thickness of the first cavity section, wherein the thickness direction is located on the cross section of the aerosol generating product and is perpendicular to the axial direction; The solid core section is arranged at the downstream end of the temperature reduction section and is communicated with the other end of the groove channel.

2. The aerosol-generating article according to claim 1, wherein The depression depth of the groove channel and the wall thickness of the first cavity section meet the following conditions: D2D1≥1.2 Wherein, D1 is the wall thickness of the first cavity section, and D2 is the recessed depth of the groove channel.

3. The aerosol-generating article according to claim 1, wherein The length of the support section, the length of the cooling section, the length of the solid core section and the total length of the filter portion meet the following conditions: 0.15≤L3L≤0.4, 0.2≤L2L≤0.6 Among them, L1 is the length of the supporting section, L2 is the length of the cooling section, L3 is the length of the solid core section, and L is the total length of the filter part L=L1+L2+L3.

4. The aerosol-generating article of claim 1, wherein: The length of the groove filter rod and the total length of the filter tip satisfy the following conditions: 0.15≤L4L≤0.5 Among them, L4 is the length of the groove filter rod, and L is the total length of the filter tip, that is, the sum of the support section length, the cooling section length and the solid core section length.

5. The aerosol-generating article of claim 1, wherein: The cross section of the groove channel is an open bowl-shaped groove, and the bowl-shaped groove includes a bottom edge and two side edges. The bottom edge is a straight edge, and the two side edges form a symmetrical outward expansion structure. The bottom edge and the two side edges are connected by rounded corners.

6. An aerosol generating article according to claim 5, characterized in that The angle formed by the extension lines of the bottom edge and the side edge is 100-130°.

7. The aerosol-generating article of claim 1, wherein: The number of the groove channels is 4 to 8, the depth of the depression is 1 to 3 mm, and the width is 1 to 2 mm.

8. The aerosol-generating article of claim 1, wherein: The total length of the filter portion is 30-60 mm, the length of the smoking portion is 10-45 mm, and the total length of the filter portion is the sum of the lengths of the supporting section, the cooling section and the solid core section.

9. The aerosol-generating article of claim 1, wherein: The cooling section also includes a second cavity section axially located between the first cavity section and the groove filter rod, the two ends of the second cavity section are respectively connected to the first cavity section and the groove filter rod, and the wall thickness of the second cavity section is smaller than the wall thickness of the first cavity section.

10. An aerosol-generating article according to claim 9, characterized in that The wall thickness of the first cavity section and the wall thickness of the second cavity section meet the following conditions: D3D1<0.8 Wherein, D1 is the wall thickness of the first cavity segment, and D3 is the wall thickness of the second cavity segment.

11. The aerosol-generating article of claim 9, wherein: The wall thickness of the first cavity section is 0.2-2.5 mm, and the wall thickness of the second cavity section is 0.1-2.0 mm.

12. The aerosol-generating article of claim 9, wherein: The outer peripheral wall of the second cavity section is provided with ventilation holes communicating with the interior thereof, the diameter of the ventilation holes is D0, D0 satisfies: 0.1mm≤D0≤0.5mm, and the number of the ventilation holes is ≤10.

13. The aerosol-generating article of claim 1, wherein: The cooling section is also provided with wrapping paper, which is wrapped around the outer periphery of the groove filter rod. The wrapping paper is provided with a ventilation area connected to the groove channel. The ventilation area is provided with ventilation holes, with a pore diameter of 10μm≤≤50μm.

14. An aerosol-generating article according to any one of claims 1 to 13, characterised in that The ventilation rate of the filter portion is ≤30%.

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