Aerosol generating product

Abstract

The invention discloses an aerosol generating product which comprises a fuming part and a filter tip part, the filter tip part is connected with the fuming part, the filter tip part comprises a solid core section, a drainage structure is arranged on the filter tip part in a surrounding mode, and the drainage structure comprises a first surrounding section, a second surrounding section and a third surrounding section. The first surrounding section is of an airtight structure and is arranged on the surface of the solid core section to isolate aerosol, the second surrounding section is connected with the first surrounding section and the third surrounding section, the second surrounding section and the third surrounding section are matched on the filter tip part to form a drainage area, and the drainage area can introduce external air into the filter tip part; and the overall ventilation rate of the filter tip part is 5-55%. According to the invention, the drainage structure is arranged on the filter tip part, so that the drainage area for introducing external air is formed on the cavity section group to adjust the overall ventilation rate of the filter tip part, the cooling effect is further improved, and the precision requirement on the independent punching effect is reduced.

Description

Technical Field

[0001] The present invention relates to the field of novel tobacco technology, and in particular to an aerosol generating product. Background Art

[0002] In recent years, as the tobacco control situation has become increasingly severe and consumers' attention to health has gradually increased, new tobacco products have become more and more popular among the public. After rapid development and optimization in recent years, aerosol-generating products such as heated cigarettes have initially achieved a good smoking experience, but there are also certain problems. The smoke temperature of heated cigarettes is too high, which reduces consumers' smoking experience.

[0003] A Chinese patent document with publication number CN215837066U discloses a heated cigarette with a perforated mouthpiece, comprising a smoking section, a cooling cavity section, a filtering section and a covering element. The covering element has a plurality of holes evenly opened in the circumference of the cooling cavity section. The diameter of the holes is not less than 0.2 mm, and the number of the holes is not more than 8. This punching method achieves the cooling of the smoke and solves the problem of poor smoking effect caused by structural defects.

[0004] The Chinese patent document with publication number CN214431747U discloses a cigarette, comprising a smoking section, a first cavity section, a second cavity section and a solid filter section connected in sequence. The first cavity section has a first cavity that is axially penetrated, and the first cavity section is added with additives; the second cavity section has a second cavity that is axially penetrated, the radial cross-sectional area of ​​the second cavity is larger than the radial cross-sectional area of ​​the first cavity, and a vent hole is opened on the side wall of the second cavity section, and the smoke is cooled by the large and small cavity structures and the perforation arrangement.

[0005] The prior art mainly relies on the cavity perforated structure of the filter to achieve cooling of the aerosol generating product, but the cooling effect is closely related to the perforation effect, especially the number of perforations, the position of the perforations and the shape of the perforations directly affect the ventilation rate of the aerosol generating product and further affect the cooling effect. Therefore, the production of aerosol generating products requires high precision and is not convenient for mechanized large-scale production. Summary of the invention

[0006] The purpose of the present invention is to provide an aerosol generating product, which can reduce the dependence of the cooling effect on the perforation effect and improve the production efficiency.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] An aerosol generating product, the aerosol generating product comprises:

[0009] The smoke generating part is used to form aerosol after heating.

[0010] The filter part is connected to the smoking part, and the aerosol flows toward the filter part under the action of external force. The filter part includes a solid core segment.

[0011] The filter tip is surrounded by a drainage structure, which includes a first surrounding section, a second surrounding section and a third surrounding section.

[0012] The first surrounding section is arranged around the solid core section to isolate the aerosol from diffusing outwards, and the third surrounding section is arranged around the smoke generating section.

[0013] The second surrounding section is connected to the first surrounding section and the third surrounding section respectively. The second surrounding section and the third surrounding section cooperate to form a drainage area on the filter part. The drainage area can introduce external air into the filter part. The overall ventilation rate of the filter part is 5% to 55%.

[0014] Furthermore, the overall ventilation rate of the filter portion is 10% to 35%.

[0015] Furthermore, the overall ventilation rate of the filter portion is 10% to 15%, 15% to 20%, 20% to 25%, 25% to 30%, or 30% to 35%.

[0016] Furthermore, the filter portion also includes a cavity segment group, and the second surrounding segment and the third surrounding segment cooperate to form a drainage area on the cavity segment group.

[0017] Furthermore, the connection between the second surrounding segment and the third surrounding segment is laminated bonding or integrally formed.

[0018] Furthermore, the first surrounding section, the second surrounding section and the third surrounding section are sequentially arranged around the filter portion from the inside to the outside, the air permeability of the second surrounding section is 1000-16000 CU, and the third surrounding section is at least partially wrapped around the second surrounding section to define a drainage area.

[0019] Furthermore, the cavity segment group includes a first cavity segment and a second cavity segment, the first cavity segment is arranged between the second cavity segment and the solid core segment, the second surrounding segment is arranged to span the length of the filter portion, and the drainage area is arranged on the first cavity segment.

[0020] Furthermore, the drainage area is arranged near the middle of the first cavity section, and the third surrounding section is an airtight structure at both ends of the drainage area. The air permeability of the third surrounding section in the drainage area is 300-5000 CU.

[0021] Furthermore, the drainage area is arranged close to the solid core segment, the third surrounding segment is an airtight structure, and the third surrounding segment is wrapped from one end of the drainage area away from the solid core segment toward the smoking part, the air permeability of the second surrounding segment is 100 to 4000CU, and preferably, the air permeability of the second surrounding segment is 500 to 3000CU.

[0022] Furthermore, the second surrounding section and the third surrounding section are integrally provided, and the air permeability of the second surrounding section is 100 to 4000 CU. Preferably, the air permeability of the second surrounding section is 500 to 3000 CU.

[0023] Furthermore, the filter portion has a porous air-permeable structure, and the material of the porous air-permeable structure includes one or more of acetate fiber, propionate fiber, plant fiber, polyester fiber, dextrin, starch, diatomaceous earth, alumina and silica. The drainage area can introduce external air into the filter portion through the porous air-permeable structure.

[0024] Furthermore, the second surrounding segment and / or the third surrounding segment has a circumferentially distributed pore structure on the cavity segment group, and the pore diameter of the pore structure is less than 50 μm.

[0025] Furthermore, the hole structure is formed by electrostatic pre-punching, plasma pre-punching or laser pre-punching technology.

[0026] Preferably, the solid core segment, the first cavity segment and the second cavity segment are arranged in sequence from downstream to upstream.

[0027] More preferably, the first cavity segment is a general term for one or several filter connecting segments that mainly play a cooling role, and the second cavity segment is a general term for one or several filter connecting segments that mainly play a supporting role.

[0028] In a preferred embodiment, the filter portion is not limited to being composed of three parts, and may include two of the second cavity segment, the first cavity segment and the solid core segment, or may be more than the above three segments.

[0029] Preferably, the smoking portion is the part of the aerosol generating product that provides tobacco substances, including tobacco shreds, thin sheet shreds, tobacco particles, flavors and fragrances, and other auxiliary materials, which provide satisfaction and pleasure for the user when smoking.

[0030] Preferably, the main material of the filter portion includes one or more of acetate tow, acrylic tow, polylactic acid tow, paper and other polymers.

[0031] Preferably, the solid segment is a solid filter rod structure, which can filter out harmful substances in the aerosol to a certain extent, reducing its health hazards to consumers. At the same time, after intercepting part of the aerosol, it reduces the temperature of the aerosol when it enters the consumer's mouth, thereby improving the comfort of smoking. On the other hand, it is also necessary to reduce the interception effect of the solid segment on the aerosol to ensure that a certain amount of tobacco substances are delivered to consumers, thereby improving consumers' smoking satisfaction.

[0032] In a preferred embodiment, the first surrounding section, the second surrounding section and the third surrounding section of the drainage structure are substantially in the form of wrapping paper.

[0033] Preferably, a drainage area is formed on the first cavity segment (and / or the second cavity segment) by ventilation, and the ventilation methods include: a) the outer layer of the segment is wrapped with only a layer of wrapping paper that is breathable in a partial area; b) the outer layer of the segment is first wrapped with a layer of high-permeability paper, and then wrapped with a layer of wrapping paper that is breathable in a partial area; c) the outer layer of the segment is first wrapped with a layer of high-permeability paper, and then wrapped with a layer of wrapping paper with an airtight structure in a partial area, so that the outside of another partial area contains only a layer of breathable paper to form a drainage area; d) and other wrapping methods of wrapping paper that can achieve the same effect.

[0034] In a preferred embodiment, the porous breathable structure includes gaps in the solid part of the filter portion that allow free flow of air. During the flow, the gas exchanges heat with the wall material of the solid part, thereby reducing the temperature of the aerosol to a certain extent.

[0035] Preferably, the porous air-permeable structure includes ventilation holes arranged on the filter portion of the solid structure. More preferably, the ventilation holes arranged on the filter portion of the solid structure present a solid honeycomb briquette structure.

[0036] In another preferred embodiment, the porous air-permeable structure includes ventilation holes arranged on the first cavity segment, and the hollow structure of the first cavity segment further prevents the material of the porous air-permeable structure from excessively retaining and adsorbing aerosols.

[0037] More preferably, the cross section of the first cavity section is an annular acetate hollow tube structure, leaving only the peripheral wall to form a circle of porous wall material, and in particular, the first cavity section presents a multi-porous honeycomb briquette structure. The cavity structure used in the second cavity section of the present invention mainly supports the tobacco material in the smoking section when it is subjected to external force, preventing it from axial movement. At the same time, the wall thickness of the second cavity section should be as small as possible while ensuring that the tobacco material does not move relative to each other, so that the aerosol components generated by the smoking section can smoothly enter the cavity, thereby reducing the interception of the aerosol components by the supporting wall material. On the other hand, the thinner wall thickness also helps the aerosol to exchange heat with the external environment through the wall material, thereby reducing the aerosol temperature.

[0038] The drainage structure provided in the filter portion of the present invention can introduce external air into the filter portion, and the external air can also be mixed with the aerosol inside the filter. In addition, the porous air-permeable structure in the filter portion cooperates with the drainage structure provided outside, so that the introduced external air can be fully mixed with the aerosol in the radial, axial or other directions after entering the first cavity section, thereby reducing the temperature of the aerosol flowing through the first cavity section.

[0039] In a preferred embodiment, the outer layer of the solid core segment is wrapped with at least one layer of airtight wrapping paper, which has the function of isolating air, and the airtight wrapping paper has a certain heat insulation effect. The solid core segment is the part of the aerosol-generating product that directly contacts the user's lips during the user's inhalation process. The airtight structure and heat insulation design of the solid core segment wrapping paper is conducive to blocking the aerosol heat from being transferred to the consumer's lips through the wrapping paper to the greatest extent, avoiding causing a burning sensation on the consumer's lips.

[0040] Preferably, the length of the solid core section L1 is ≥5 mm. More preferably, the length of the solid core section L1 is ≥7 mm.

[0041] In a preferred embodiment, the third surrounding segment contains at least a partial airtight structure, so the second surrounding segment can cooperate with the third surrounding segment to form a drainage area on the cavity segment group, and the external air can be introduced into the cavity segment group through the drainage area.

[0042] In a preferred embodiment, the number of layers of the first surrounding segment, the second surrounding segment or the third surrounding segment wrapped on the outer layer of the filter portion can be set to multiple layers, and the number of layers of the surface wrapping of each part of the solid core segment, the first cavity segment and the second cavity segment can also be different.

[0043] Preferably, the outer layer of the first cavity segment is wrapped with one layer of the second surrounding segment, or is wrapped with at most two layers of the second surrounding segment.

[0044] More preferably, the first layer is arranged as the first surrounding segment, the second layer is arranged as the second surrounding segment, the third layer is arranged as the third surrounding segment and the nth layer is arranged as the nth surrounding segment and are sequentially wrapped outside the segments of the aerosol generating article in an order from inside to outside.

[0045] The present invention uses a drainage structure with air permeability to achieve the ventilation rate of the filter part, thereby improving the cooling effect of the first cavity section. However, in order to avoid too much external air being introduced due to an excessively high air permeability, thereby diluting the aerosol body of the aerosol generating product and affecting the consumer's smoking experience, the air permeability of the air permeable paper should not be too high. The present invention ensures a certain atomization effect of the aerosol generating product and enables the aerosol to achieve a better cooling effect.

[0046] In a preferred embodiment, the air permeability of the wrapping paper can be adjusted by densely perforating a portion of the wrapping paper, preferably forming a hole band of a certain width in the axial direction of the wrapping paper.

[0047] Preferably, the holes can be punched during the production of the wrapping paper by electrostatic, plasma, laser, etc. The formed pore structure is micropores, and the pore size of the pore structure is generally below 50 μm, and the pore size is determined according to the punching method and the design value of the air permeability. The number of micropores on the air permeable belt of the aerosol generating product can reach hundreds.

[0048] The plasma punching technology in the present invention refers to the process of high voltage discharge under the protection of inert gas to generate plasma evaporation to act on the wrapping paper, thereby forming a small perforated area at a specific position of the wrapping paper. The plasma punching adjusts the air permeability of the second or third surrounding section by adjusting the pulse frequency, power, and vehicle speed.

[0049] The electrostatic punching technology in the present invention refers to the use of high voltage discharge between electrodes to generate electric sparks to break through the wrapping paper to achieve punching. The electrostatic punching adjusts the air permeability of the wrapping paper by adjusting the number of electrode needles, power, and vehicle speed.

[0050] In a preferred embodiment, the first cavity segment punching technology is also used in the design of the aerosol generating product, using online laser punching. The online laser punching technology generally uses a high-power laser punching device to punch through the filter wrapping paper and the internal cavity wall, so that the external air can directly enter the filter freely through the punched holes. At this time, the punched part of the aerosol generating product must be a thin-walled hollow tube structure so that the wall material can be punched through by laser punching, and the external airflow can only flow in from the punched part. This type of laser punching is a visible hole with a relatively large aperture, generally above 0.1 mm. At the same time, the number of holes punched is small, generally ranging from a few to dozens.

[0051] The present invention provides an aerosol generating product, which forms a drainage area for introducing external air on the cavity segment group by arranging a drainage structure on the filter part to adjust the overall ventilation rate of the filter part, further improves the cooling effect, and reduces the accuracy requirement for the individual punching effect.

[0052] In the drainage structure used in the present invention, the second surrounding section or the third surrounding section adopts a dense micro-pore structure with a small pore size and a large number. There is no need to accurately control the number of holes and the pore size in the drainage area. Instead, the ventilation effect is comprehensively measured by the punching density (the number of holes per unit area on the paper), the average pore size, and the overall air permeability of the paper, thereby avoiding the problem of fluctuations in the overall punching effect caused by the poor punching effect of the online laser punching part due to various reasons. Therefore, the filter ventilation rate of the aerosol generating product provided by the present invention is more stable than that of the commonly used online laser punching method, the coefficient of variation of the ventilation rate is lower, the suction resistance is more stable, and the smoke is softer and more delicate when consumers inhale.

[0053] The second surrounding segment or the third surrounding segment of the present invention is already densely covered with micropores when provided, and there is no need for online punching during the production process of the aerosol generating product, thereby avoiding the impact on vehicle speed due to the need for online laser punching during the manufacturing process of the aerosol generating product, thereby ensuring higher production efficiency. In addition, it can also solve the existing problem that during the online laser punching of the second surrounding segment or the third surrounding segment, the high-power laser will penetrate the wrapping paper and the filter, and the resulting burnt smell will be absorbed by the filter, thereby avoiding affecting the sensory experience of consumers when smoking. The second surrounding segment or the third surrounding segment provided by the present invention has a pore structure with an aperture of less than 50μm, and can be achieved by electrostatics, plasma, etc., so it is no longer necessary to punch holes during the manufacturing process of the aerosol generating product, thereby avoiding the generation of a burnt smell in the aerosol generating product. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above content and the following specific embodiments of the present invention will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection.

[0055] Figure 1 is a schematic diagram of an aerosol-generating article according to a first embodiment of the present invention;

[0056] Figure 2 is a schematic diagram of an aerosol-generating article according to a fifth embodiment of the present invention;

[0057] Figure 3 is a schematic diagram of an aerosol-generating article according to a sixth embodiment of the present invention.

[0058] The reference numerals are described as follows:

[0059] Solid core segment: 1

[0060] First cavity segment: 2

[0061] Second cavity segment: 3

[0062] Smoke department: 4

[0063] First surround segment: 51

[0064] Second surround segment: 52

[0065] Third surround segment: 53

[0066] Drainage area: 6 DETAILED DESCRIPTION

[0067] The detailed features and advantages of the present invention are described in detail in the specific implementation modes below, and the contents are sufficient to enable any person skilled in the art to understand the technical contents of the present invention and implement them accordingly. Moreover, according to the description, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant objects and advantages of the present invention.

[0068] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0069] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0070] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0071] like Figure 1 The first embodiment of the present invention is an aerosol generating product, which comprises, from left to right, a solid core segment 1, a first cavity segment 2, a second cavity segment 3 and a smoke generating portion 4. The inner diameter of the cavity of the first cavity segment 2 is greater than the inner diameter of the second cavity segment 3. The lengths of the segments are 8 mm, 12 mm, 10 mm and 13 mm, respectively.

[0072] The solid core segment 1, the first cavity segment 2 and the second cavity segment 3 of the aerosol generating product constitute the filter portion. The first surrounding segment 51, the second surrounding segment 52 and the third surrounding segment 53 of the drainage structure are generally in the form of wrapping paper. The filter portion has a total of three layers of wrapping paper. From the inside to the outside of the filter portion, the first layer of wrapping paper (the first surrounding segment 51) only wraps the solid core segment 1, the second layer of wrapping paper (the second surrounding segment 52) ​​wraps the entire filter portion, and the third layer of wrapping paper (the third surrounding segment 53) wraps the entire filter portion and a partial area of ​​the smoking portion 4. Among them, the second layer of wrapping paper is uniformly breathable as a whole, with an air permeability of 6000CU. The third layer of wrapping paper cooperates with the second layer of wrapping paper and defines a drainage area 6 with an axial length of 4mm in the middle area of ​​the first cavity segment 2. Among them, the second surrounding segment 52 and / or the third surrounding segment 53 form a circumferentially distributed hole structure on the cavity segment group, and the external air is introduced into the cavity segment group through the hole structure to achieve air permeability so as to adjust the overall ventilation rate of the filter part. The hole structure of the third surrounding segment 53 is formed by electrostatic pre-punching or plasma pre-punching technology. The sample ventilation effect obtained by electrostatic pre-punching or plasma pre-punching technology is equivalent, and the pore diameter of the hole structure is less than 50μm.

[0073] In order to further illustrate the beneficial effects of the present invention, the aerosol generating product provided by the present invention and the comparative example were tested for ventilation rate, total particulate matter and outlet aerosol temperature.

[0074] The above-mentioned aerosol generating products are used in conjunction with heating devices. When comparing the effects of aerosol generating products, in order to ensure the consistency of smoking conditions, a smoking machine is used and tested under certain parameter conditions. 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. The capture ends after the 8th puff, and each aerosol generating product captures 8 puffs of aerosol. After the puff is finished, the total particulate matter captured by each sample is weighed. Among them, the heating method of the heating device includes the use of commonly used heating methods such as electric heating, electromagnetic heating and infrared heating.

[0075] In order to compare the temperature perception of users when inhaling aerosol-generating products, the thermocouple temperature measurement method is used. The thermocouple is fixed 1 mm from the center of the filter outlet of the aerosol-generating product, and the thermocouple is connected to the 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.

[0076] The ventilation rate, total particulate matter, and outlet aerosol temperature of each aerosol-generating product were summarized as follows:

[0077] Table 1 Comparison of the effects of aerosol generating products

[0078]

[0079] From the data comparison in Table 1, it can be seen that compared with Comparative Example 1 in which the third surrounding section 53 is an airtight structure without air permeability as a whole, the aerosol generating product provided by the present invention is used, and by designing the parameters of the air permeability of the drainage area 6, as the ventilation rate of the aerosol generating product increases, the total particulate matter captured increases, and at the same time, the outlet aerosol temperature decreases. This indicates that the use of the aerosol generating product provided by the present invention not only reduces the aerosol temperature at the filter outlet, but also increases the content of the total particulate matter captured, achieving a win-win effect.

[0080] Specifically, the first cavity section 2 has a porous air-permeable structure, the three-section filter rod of the filter part is made of acetate fiber, the cross-section of the first cavity section 2 is a ring-shaped acetate fiber hollow tube structure, and the porous air-permeable structure is presented as a plurality of ventilation holes on the first cavity section 2, preferably a multi-porous honeycomb briquette structure. In this way, the drainage structure is wrapped outside the filter part to form a porous three-dimensional mesh structure. Using a double-length filter part for testing, the overall ventilation rate of the filter part is 54%, which confirms that the aerosol generating product provided by the present invention is a porous structure, and the gas can flow freely inside the filter.

[0081] In order to further illustrate the advantages of the present invention, a wrapping paper with an air permeability of 0 in the third surrounding section 53 is used, and online laser punching is used to achieve the sample ventilation rate as a comparative example. The number of punchings in comparative examples 2 to 5 is 2, 4, 6 and 8, respectively, and the ventilation rates and their coefficients of variation of embodiments 1 to 4 are compared. The results are shown in Table 2:

[0082] Table 2 Comparison of ventilation rate and its coefficient of variation

[0083]

[0084] From the results in Table 2, it can be seen that the coefficient of variation of the ventilation rate of the comparative example using laser drilling is relatively large, and as the number of holes punched increases, the coefficient of variation of the ventilation rate decreases; while the present invention uses electrostatic pre-punching or plasma pre-punching technology, which can make the coefficient of variation of the ventilation rate smaller and the ventilation rate highly stable. This is because the number of holes punched by the online laser punching method is generally small, and individual holes are not ideal, and it is often difficult to accurately control the punching effect due to objective reasons such as laser power and running speed, which will have a greater impact on the ventilation rate, resulting in large fluctuations in the actual ventilation rate of the sample, making the quality stability of the aerosol-generated product not high. However, as the number of holes increases, the ventilation rate becomes larger, and the ventilation rate tends to be stable. The ventilation rate formed by the densely distributed small holes on the drainage structure provided by the present invention is relatively stable, and the overall ventilation rate will not be greatly affected by changes in individual holes.

[0085] like Figure 2The fifth embodiment of the present invention is an aerosol generating product, which comprises, from left to right, a solid core segment 1, a first cavity segment 2, a second cavity segment 3 and a smoke generating portion 4. The inner diameter of the cavity of the first cavity segment 2 is greater than the inner diameter of the second cavity segment 3. The lengths of the segments are 8 mm, 18 mm, 7 mm and 13 mm, respectively.

[0086] The solid core segment 1, the first cavity segment 2 and the second cavity segment 3 of the aerosol generating product constitute the filter part. The first surrounding segment 51, the second surrounding segment 52 and the third surrounding segment 53 of the drainage structure are generally in the form of wrapping paper. The filter part has a total of three layers of wrapping paper. From the inside to the outside of the filter part, the first layer of wrapping paper (the first surrounding segment 51) only wraps the solid core segment 1, the second layer of wrapping paper (the second surrounding segment 52) ​​wraps the entire filter part, and the third layer of wrapping paper (the third surrounding segment 53) wraps the entire smoking part 4, the entire second cavity segment 3 of the filter part and a partial area of ​​the first cavity segment 2. Among them, the second surrounding segment 52 forms a circumferentially distributed hole structure on the cavity segment group, and the external air is introduced into the cavity segment group through the hole structure to achieve ventilation so as to adjust the overall ventilation rate of the filter part. Preferably, the second layer of wrapping paper is uniformly breathable as a whole, with an air permeability of 4000CU; the third layer of wrapping paper cooperates with the second layer of wrapping paper and defines a drainage area 6 with an axial length of 5 mm in the area of ​​the first cavity section 2 close to the solid core section 1. The three-section filter rod of the filter tip of this embodiment is made of acetate fiber to form a porous three-dimensional mesh structure, and the overall ventilation rate of the filter tip is 32%.

[0087] like Figure 3 The sixth embodiment of the present invention is an aerosol generating product, which comprises, from left to right, a solid core segment 1, a first cavity segment 2, a second cavity segment 3 and a smoke generating portion 4. The inner diameter of the cavity of the first cavity segment 2 is greater than the inner diameter of the second cavity segment 3. The lengths of the segments are 8 mm, 18 mm, 7 mm and 13 mm, respectively.

[0088] The solid core segment 1, the first cavity segment 2 and the second cavity segment 3 of the aerosol generating product constitute the filter part. The first surrounding segment 51 and the second surrounding segment 52 of the drainage structure are generally in the form of wrapping paper. The filter part has a total of two layers of wrapping paper. From the inside to the outside of the filter part, the first layer of wrapping paper (the first surrounding segment 51) only wraps the solid core segment 1, and the second layer of wrapping paper (the second surrounding segment 52) ​​wraps the entire filter part and part of the smoking part 4. The air permeability of the second layer of wrapping paper is 3000CU and is located on the drainage area 6. There is an axially 5mm long drainage area 6 in the middle area of ​​the first cavity segment 2. Among them, the second surrounding segment 52 forms a circumferentially distributed pore structure on the cavity segment group, and the external air is introduced into the cavity segment group through the pore structure. The three-stage filter rod of the filter part of this embodiment is made of acetate fiber to form a porous three-dimensional mesh structure, and the overall ventilation rate of the filter part is 30%.

[0089] The terms and expressions used herein are for descriptive purposes only, and the present invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, variations and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0090] Similarly, it should be pointed out that although the present invention has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions may be made without departing from the spirit of the present invention. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present invention, they will fall within the scope of the claims of the present invention.

Claims

1. An aerosol-generating article, comprising: a smoke generating unit, wherein the smoke generating unit is used to form an aerosol after heating, A filter portion, the filter portion is connected to the smoking portion, and under the action of external force, the aerosol flows toward the filter portion, and the filter portion includes a solid core segment, The filter part is characterized in that a drainage structure is arranged around the filter part, and the drainage structure includes a first surrounding section, a second surrounding section and a third surrounding section. The first surrounding section is arranged around the solid core section to isolate the aerosol from diffusing outwards, and the third surrounding section is arranged around the smoke generating section. The second surrounding section is connected to the first surrounding section and the third surrounding section respectively, and the second surrounding section and the third surrounding section cooperate to form a drainage area on the filter portion, and the drainage area can introduce external air into the filter portion. The overall ventilation rate of the filter portion is 5% to 55%.

2. The aerosol-generating article according to claim 1, wherein The filter portion further comprises a cavity segment group, the second surrounding segment and the third surrounding segment cooperate to form a drainage area on the cavity segment group, and the second surrounding segment and the third surrounding segment are connected by stacking and bonding or integrally formed.

3. The aerosol-generating article according to claim 2, wherein: The first surrounding segment, the second surrounding segment and the third surrounding segment are sequentially arranged around the filter portion from the inside to the outside, the air permeability of the second surrounding segment is 1000-16000 CU, and the third surrounding segment is at least partially wrapped around the second surrounding segment to define the drainage area.

4. The aerosol-generating article according to claim 3, wherein: The cavity segment group includes a first cavity segment and a second cavity segment, the first cavity segment is arranged between the second cavity segment and the solid core segment, the second surrounding segment is arranged to span the length of the filter portion, and the drainage area is arranged on the first cavity segment.

5. An aerosol generating article according to claim 4, characterized in that The drainage area is arranged near the middle of the first cavity section, and the third surrounding section is an airtight structure at both ends of the drainage area. The air permeability of the third surrounding section in the drainage area is 300-5000 CU.

6. The aerosol-generating article of claim 4, wherein: The drainage area is arranged close to the solid core segment, the third surrounding segment is an airtight structure, and the third surrounding segment is wrapped from one end of the drainage area away from the solid core segment toward the smoking part, and the air permeability of the second surrounding segment is 100-4000CU.

7. The aerosol-generating article of claim 2, wherein: The second surrounding section and the third surrounding section are integrally arranged, and the air permeability of the second surrounding section is 100-4000 CU.

8. The aerosol-generating article of claim 1, wherein: The filter portion has a porous air-permeable structure, and the material of the porous air-permeable structure includes one or more of acetate fiber, propionate fiber, plant fiber, polyester fiber, dextrin, starch, diatomaceous earth, alumina and silica. The drainage area can introduce external air into the filter portion through the porous air-permeable structure.

9. The aerosol-generating article of claim 1, wherein: The second surrounding segment and / or the third surrounding segment has a circumferentially distributed pore structure on the cavity segment group, and the pore diameter of the pore structure is less than 50 μm.

10. An aerosol-generating article according to claim 9, characterized in that The hole structure is formed by electrostatic pre-punching, plasma pre-punching or laser pre-punching technology.

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