CN117652720A - Aerosol generating product, preparation method and aerosol generating system - Google Patents

Abstract

An aerosol-generating article for generating an aerosol; a first lumen segment connected to the downstream end of the aerosol-generating substrate, the first lumen segment being provided with a first cavity extending axially therethrough; the second lumen section is arranged at the downstream end of the first lumen section, the second lumen section is provided with a second cavity which is penetrated along the axial direction, and the first cavity is communicated with the second cavity; wherein the first cavity and the second cavity are separated from the outside in the radial direction; the second cavity has a volume greater than the volume of the first cavity and a wall thickness less than the wall thickness of the first cavity. The invention can reduce the aerosol temperature without affecting the smoke taste, improve the experience of consumers, and has simple process and low cost. The invention also provides a preparation method of the aerosol-generating product and an aerosol-generating system.

Description

An aerosol-generating product, preparation method and aerosol-generating system

Technical field

The invention relates to the field of tobacco products, and in particular to an aerosol-generating product, a preparation method and an aerosol-generating system.

Background technique

With the improvement of people's health awareness, low-harm cigarettes have become the future development trend of tobacco. The principle of atomized tobacco products is that the aerosol-generating matrix (mainly tobacco raw materials) absorbs the external heat provided by the heater, raising its own temperature and releasing aerosol. Since only the aerosol-generating matrix is heated instead of burned, harmful components produced by high-temperature combustion of tobacco are reduced, and the release of side-stream smoke and ambient smoke is also significantly reduced. Compared with e-cigarettes, atomized tobacco products use tobacco materials as the main raw material for the aerosol-generating matrix, and their aroma is closer to traditional cigarettes, so they are widely favored by consumers.

At present, the main problems of atomized tobacco products include poor smoking effect, insufficient fullness, and high aerosol inlet temperature. Problems such as poor smoking effect and bland smoke taste are mainly related to factors such as the structural design of atomized tobacco products, aerosol-generating matrix formula and flavoring. The high aerosol inlet temperature is mainly due to the relatively short aerosol passage of atomized tobacco products, low aerosol filtration effect, and high moisture content in the aerosol, which makes consumers perceive a higher temperature.

The Chinese patent document with publication number CN104010531B discloses an aerosol-generating product used together with an aerosol-generating device, which relates to an aerosol-generating product and a method of using the aerosol-generating product. Such aerosol-generating articles include an aerosol-forming substrate for generating an inhalable aerosol when heated by an internal heating element of the aerosol-generating device. The aerosol-generating article also includes a cooling element using aggregated biodegradable polymer material, such as aggregated polylactic acid sheets. However, due to the complex overall structure of the aerosol-generating product, and the manufacturing complexity and high cost, manufacturing such multi-component aerosol-generating products usually requires quite complex manufacturing machinery and process technology.

Hollow tubular structure combined with ventilation technology is one of the effective means to reduce the aerosol temperature of atomized tobacco products. When the mixture of air and aerosol particles flowing through the atomized tobacco product reaches the ventilation area, the external air sucked into the hollow tubular section through the ventilation area mixes with the aerosol, rapidly reducing the temperature of the aerosol mixture. The ventilation zone is set at a certain distance from the mouth section of the aerosol-generating product and the upstream end, and the cooling section is effectively placed immediately upstream of the mouthpiece, which is helpful for the nucleation and growth of aerosol particles.

For example, the patent with publication number CN113163850A discloses an aerosol-generating product for generating inhalable aerosol when heated. The aerosol-generating product includes: a strip of aerosol-generating substrate and an aerosol-generating article between the strip and the mouthpiece section. A hollow tubular segment at the location. The hollow tubular section is longitudinally aligned with the rod and mouthpiece section. Furthermore, the hollow tubular section defines a cavity extending up to the upstream end of the mouthpiece section. The aerosol-generating article also includes a ventilation zone along the hollow tubular section at a location less than about 18 millimeters from the upstream end of the hollow tubular section. The wall thickness of the peripheral wall of the hollow tubular section is less than about 1.5 millimeters. The strip of aerosol-generating substrate includes at least an aerosol-forming agent, the strip of aerosol-generating substrate having an aerosol-forming agent content of at least about 10% by dry weight. However, this hollow tubular cooling method using ventilation has the effect of diluting smoke, affecting consumer experience. It also increases the cost of manufacturing equipment, increases process complexity, and reduces production efficiency.

Contents of the invention

The purpose of the present invention is to solve the problems of current methods of reducing the aerosol temperature of atomized tobacco products, which dilute smoke and affect consumers' experience, as well as complicated processes and increased production costs. The invention provides an aerosol-generating product that can reduce the aerosol temperature without affecting the taste of smoke, improve consumer experience, and has a simple process and low cost.

In order to solve the above technical problems, an embodiment of the present invention discloses an aerosol-generating product, including:

Aerosol generating matrix, used to generate aerosol;

The first lumen section is connected to the downstream end of the aerosol generating base body, and the first lumen section is provided with a first cavity penetrating along the axial direction;

The second lumen section is provided at the downstream end of the first lumen section. The second lumen section is provided with a second cavity that penetrates in the axial direction, and the first cavity is connected with the second cavity;

Wherein, the first cavity and the second cavity are radially isolated from the outside world; the volume of the second cavity is larger than the volume of the first cavity, and the wall thickness of the second cavity is smaller than the wall thickness of the first cavity.

Adopting the above technical solution, the combination form of "small cavity structure + large cavity structure" is used, that is, the first cavity volume of the small-volume first lumen segment is combined with the large-volume second lumen segment. At the same time, The wall thickness of the second cavity is smaller than the wall thickness of the first cavity, which can cause the pressure of the aerosol generated after heating to decrease when it passes from the first cavity to the second cavity. This sudden change in the flow field is conducive to strengthening the inner wall surface of the second cavity. Convection heat transfer thereby promotes the reduction of aerosol temperature; at the same time, the thinner the wall thickness, the smaller the thermal resistance of heat transfer, so when the flue gas flows through the second cavity, it can fully pass through the cavity wall and the external environment Heat exchange between them further improves the cooling effect. On the other hand, the smoke temperature is related to both the smoking effect and fullness. Effectively reducing the smoke temperature can also promote the condensation and atomization of smoke components, improving the smoking effect and fullness.

As a specific embodiment, a filter section is also included, which is connected to the downstream section of the second lumen section. The aerosol generated after the aerosol generating base is heated can pass through the first lumen section, the second lumen section and the filter section in sequence. .

As a specific implementation, the volume of the second cavity and the volume of the first cavity satisfy the following conditions:

1.5≤V ₂ /V ₁ ≤5

Among them, V ₁ is the volume of the first cavity, and V ₂ is the volume of the second cavity.

As a specific implementation, the wall thickness of the second cavity is less than or equal to 1.5 mm.

As a specific embodiment, the length of the second lumen section and/or the length of the filtering section is less than or equal to the length of the first lumen section.

As a specific implementation, the lengths of the first lumen section, the second lumen section and the filter section also meet the following conditions:

L ₃ /(L ₁ +L ₂ )≤0.5

Among them, L ₁ is the length of the first lumen segment, L ₂ is the length of the first lumen segment, and L ₃ is the length of the filtering segment.

As a specific implementation, the lengths of the first lumen section and the second lumen section also meet the following conditions:

L ₂ /L ₁ ≥1.5

Among them, L ₁ is the length of the first lumen segment, and L ₂ is the length of the first lumen segment.

As a specific embodiment, the aerosol-generating matrix includes an aerosol-forming agent, and the aerosol-forming agent accounts for at least 10% of the aerosol-generating matrix in terms of dry weight.

As a specific embodiment, the materials of the first lumen section, the second lumen section and the filter section include at least one of the following: acetate fiber tow, propylene fiber tow, polylactic acid fiber tow, and paper.

Another embodiment of the present application also discloses a method for preparing an aerosol-generating product, which is used to prepare the above-mentioned aerosol-generating product, including the following steps:

The first lumen section, the second lumen section and the filter section are each formed;

The first lumen section, the second lumen section and the filter section are compounded into a ternary composite filter rod using molding paper;

Compound the ternary composite filter rod with the aerosol-generating matrix to form an aerosol-generating product;

Wherein, the forming of the first lumen segment and/or the second lumen segment includes the following steps:

After the tow is opened and sprayed with triacetin, it is introduced into the filter rod forming smoke chamber through a high-pressure nozzle for shaping.

Another embodiment of the present application also discloses an aerosol generation system, including:

The above-mentioned aerosol-generating products;

An aerosol generating device includes a heating element, and the heating element is used to heat the aerosol generating substrate to generate aerosol.

Description of drawings

Figure 1 shows a schematic structural diagram of an aerosol-generating product according to an embodiment of the present invention;

In the figure: 10-aerosol generating matrix, 20-first lumen section, 21-first cavity, 30-second lumen section, 31-second cavity, 40-filtration section.

Detailed ways

The implementation of the present invention is described below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the present invention will be described in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the invention. The following description contains numerous specific details in order to provide a thorough understanding of the invention. The invention may be practiced without these details. Furthermore, some specific details will be omitted from the description in order to avoid confusing or obscuring the focus of the present invention. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

It should be noted that in this specification, similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be referenced in subsequent drawings. for further definition and explanation.

In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the customary placement of the product of the invention when used. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does 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 of the present invention. .

The terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

In the description of this embodiment, it should also be noted that, unless otherwise clearly stated and limited, the terms "set", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood in specific situations.

In order to make the purpose, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

This embodiment provides an aerosol-generating product. Refer to Figure 1 . It includes an aerosol-generating base 10, a first lumen section 20, a second lumen section 30, and a filter section 40. The end of the aerosol-generating product away from the mouth is The upstream end, the end close to the mouth end is the downstream end. The aerosol generating base 10, the first lumen section 20, the second lumen section 30 and the filter section 40 are arranged in sequence from the upstream end to the downstream end (that is, along the X in Figure 1 Set in sequence as shown in the direction). Among them, the aerosol generating base 10 is used to generate aerosol for consumers to inhale. The first lumen section 20 is connected to the downstream end of the aerosol generating base 10 , and the first lumen section 20 is provided with a first cavity 21 penetrating along the axial direction. The second lumen section 30 is connected to the downstream end of the first lumen section 20 , and the second lumen section 30 is provided with a second cavity 31 that penetrates along the axial direction. The first cavity 21 and the second cavity 31 form a smoke passage. After the aerosol generating substrate 10 is heated to generate smoke, the smoke passes through the first lumen section 20, the second lumen section 30 and the filter section 40 in sequence. The filter section 40 is a non-cavity structure and is used to filter harmful substances in the smoke. . In this embodiment, the first cavity 21 and the second cavity 31 are radially isolated from the outside world, that is, the first cavity 21 and the second cavity 31 do not have ventilation features; and the walls of the second cavity 31 The thickness is smaller than the wall thickness of the first cavity 21 , and the volume of the second cavity 31 is larger than the volume of the first cavity 21 .

In another specific embodiment, the aerosol-generating base 10, the first lumen section 20, the filter section 40 and the second lumen section 30 are arranged in sequence from the upstream end to the downstream end of the aerosol-generating article, that is, the aerosol-generating article After the base body 10 is heated to generate smoke, the smoke passes through the first lumen section 20 , the filter section 40 and the second lumen section 30 in sequence.

Specifically, the heat exchange path between the aerosol in the first cavity 21 and/or the second cavity 31 and the external environment mainly includes convection heat transfer on the inner wall of the cavity, heat conduction in the wall, and heat transfer between the outer wall and the environment. Three parts of convection heat transfer. Using the above technical solution, the combination form of "small cavity structure + large cavity structure" is used, that is, the volume of the first cavity 21 of the small-volume first lumen section 20 is combined with the large-volume second lumen section 30 , at the same time, the wall thickness of the second cavity 31 is smaller than the wall thickness of the first cavity 21, which can cause the pressure of the aerosol generated after heating to decrease when it passes from the first cavity 21 to the second cavity 31. The sudden change of the flow field is conducive to The convection heat transfer on the inner wall surface of the second cavity 31 is enhanced to promote the reduction of the aerosol temperature; at the same time, the thinner the wall thickness, the smaller the thermal resistance of heat transfer, so when the smoke flows through the second cavity 31, it can Fully conduct heat exchange between the lumen wall and the external environment to further improve the cooling effect. On the other hand, the smoke temperature is related to both the smoking effect and fullness. Effectively reducing the smoke temperature can also promote the condensation and atomization of smoke components, improving the smoking effect and fullness.

In addition, as mentioned above, the combination of "small cavity structure + large cavity structure" can achieve effective cooling of the flue gas without drilling holes in the first lumen section 20 or the second lumen section 30, that is, the first The cavity 21 and the second cavity 31 are radially isolated from the outside world. Compared with the current method of drilling additional holes in the lumen section to achieve cooling, this embodiment can avoid the introduction of external air through the holes. This causes the problem of smoke dilution, that is, the technical solution of this embodiment can take into account both reducing the aerosol temperature and ensuring the taste of the smoke. On the other hand, both the first lumen section 20 and the second lumen section 30 are hollow structures, which retain less aerosols flowing through them, ensuring that as much aerosols as possible can pass through and be delivered to consumers.

Specifically, the inner diameter of the first cavity 21 can be set accordingly according to the diameter of the tobacco section to prevent the heating element from being inserted into the aerosol generating base 10 due to the inner diameter of the first cavity 21 being too large. The occurrence of axial displacement may even cause the tobacco substances in the aerosol-generating matrix 10 to loosen, which is not conducive to heat transfer between the tobacco substances.

For example, the cross-sectional shapes of the first cavity 21 and the second cavity 31 include but are not limited to circular, elliptical, and star shapes. The cross-sectional shapes of the first cavity 21 and the second cavity 31 may be the same or different, and are not limited thereto.

Further, the volume of the second cavity 31 and the volume of the first cavity 21 satisfy the following conditions: 1.5≤V ₂ /V ₁ ≤5, where V ₁ is the volume of the first cavity 21 and V ₂ is the second cavity 21 . The volume of cavity 31. The ratio range of the volume of the second cavity 31 to the volume of the first cavity 21 is mainly achieved by adjusting the inner diameter of the second cavity 31 and the axial length of the first lumen section 20 and/or the second lumen section 30 . For example, the inner diameter of the first cavity is 2.5mm˜4.5mm, and the inner diameter of the second cavity is 3.5mm˜6mm. The outer diameters of the first cavity and the second cavity (ie, the outer diameter of the aerosol-generating article) are not limited.

For example, the length of the first lumen section 20 and/or the second lumen section 30 is not less than 5 mm to facilitate processing and ensure length stability.

For example, the wall thickness of the first cavity 21 is W ₁ and the wall thickness of the second cavity 31 is W ₂ , then W ₁ >W ₂ and W ₂ ≤ 1.5mm. Preferably, W ₂ ≤1.2mm. Since the heat exchange path between the aerosol in the first cavity 21 and/or the second cavity 31 and the external environment mainly includes convection heat transfer on the inner wall of the cavity, heat conduction in the wall, and convection heat exchange between the outer wall and the environment. When the smoking environment conditions are similar, the convection heat transfer coefficients of the inner and outer walls of the first cavity 21 and/or the second cavity 31 are not much different. The thermal conductivity of thin-walled materials is low, so the cooling effect is mainly dominated by the wall thickness of the thin wall. The thinner the wall thickness, the smaller the thermal resistance to heat transfer, and the more sufficient the heat exchange between the flue gas in the cavity and the external environment. , the better the cooling effect. Therefore, reducing the wall thickness of the second cavity 31, that is, increasing the inner diameter of the second cavity 31, is beneficial to lowering the aerosol temperature.

At the same time, as above, the wall of the first lumen section 20 needs to have the function of supporting the aerosol-generating substrate 10. If the inner diameter of the first cavity 21 is too large, the aerosol-generating substrate 10 will easily undergo axial displacement when heated, and even cause the aerosol-generating substrate 10 to The loose tobacco material in the tobacco material is not conducive to heat transfer between the tobacco materials, so the inner diameter of the first cavity 21 should not be too large. However, if the inner diameter of the first cavity 21 is too small, the generated aerosol may be trapped too much on the wall of the first lumen section 20, affecting the taste of the smoke. Therefore, the relative ratio between the first cavity 21 and the second cavity 31 needs to meet a certain range in order to reduce the temperature of the smoke, ensure the taste of the smoke, and prevent the aerosol generating base 10 from being displaced.

Specifically, the wall thickness of the second cavity 31 is the minimum distance measured between its outer wall and the inner cavity wall. In fact, the distance at a given position is measured in a direction substantially perpendicular to the outer and inner walls of the second cavity 31 . For cavity elements with a substantially circular cross-section, this distance is measured substantially in the radial direction of the second cavity 31 .

Illustratively, in this embodiment, the lengths of the first lumen section 20 , the second lumen section 30 and the filtering section 40 also satisfy the following conditions: L ₁ ≤ L ₂ , L ₃ ≤ _{L 2} , that is, the length of the second tube The length of the lumen section 30 is greater than the lengths of the first lumen section 20 and the filter section 40 respectively. It is further satisfied that L ₃ /(L ₁ +L ₂ )≤0.5, that is, the sum of the lengths of the first lumen section 20 and the second lumen section 30 is greater than twice the length of the filter section 40 . Preferably, L ₂ /L ₁ ≥1.5.

The length of the first lumen section 20 is L ₁ , the length of the second lumen section 30 is L ₂ , and the length of the filter section 40 is L ₃ .

Such an arrangement increases the length of the second tube cavity section 30, thereby increasing the heat exchange time of the flue gas in the second tube cavity, and achieving better cooling of the flue gas.

The following is a detailed description of the comparison of the aerosol capture amount and the flue gas outlet temperature under different parameters of the aerosol-generating products of the embodiments of the present application.

Embodiment 1

Sample 1 includes an aerosol generating matrix 10, a first lumen section 20, a second lumen section 30 and a filter section 40, with a diameter of 7.8mm. The length of the aerosol generating substrate 10 is 13.5mm, the length L1 of the first lumen section ₂₀ is 10mm, and the wall thickness _W1 is 2.1mm; the length _L2 of the second lumen section 30 is 12mm, and the wall thickness _W2 is 1.2mm; The length L3 of the filter section 40 is 8 mm. The ratio V 2 _/ V 1 of the volume V ₂ of the second cavity 31 of the second lumen section 30 to the volume V ₁ of the first cavity 21 of the first lumen section ₂₀ is 2.9.

Sample 2 includes an aerosol generating matrix 10, a first lumen section 20, a second lumen section 30 and a filter section 40, with a diameter of 7.8mm. The length of the aerosol generating substrate 10 is 13.5mm; the length _L1 of the first lumen section 20 is 10mm, and the wall thickness _W1 is 2.1mm; the length _L2 of the second lumen section 30 is 12mm, and the wall thickness _W2 is 0.85mm; The length L ₃ of the filter section 40 is 8 mm. The ratio V 2 _/ V 1 of the volume V ₂ of the second cavity 31 of the second lumen section 30 to the volume V ₁ of the first cavity 21 of the first lumen section ₂₀ is 3.6.

The above-mentioned aerosol-generating products are used with heated smoking devices. When comparing the effects of aerosol-generating product samples, in order to ensure the consistency of smoking conditions, a smoking machine is used and tested under certain parameter conditions. One of the smoking methods is listed below, specifically As follows: Put the above-mentioned atomized tobacco products into the same heated smoking device for smoking, and set the smoking machine parameters (such as using bell-shaped wave smoking, the smoking plan is the Canadian deep smoking method, and the smoking capacity is 55mL). Make the button pressing time of the heated smoking device 2.4s, start taking the first puff after an interval of 14.6s, and take each puff for 2s. Take the next puff after an interval of 28 seconds. After taking the 8th puff, end the collection and capture each cigarette. 8 puffs of aerosol. Among them, the heating methods of the heated smoking article include but are not limited to the use of electric heating, electromagnetic heating and infrared heating.

In order to compare the atomization effect of aerosol-generating products and the amount of chemical substances inhaled by smokers from the aerosol, a glass fiber filter smoke trap was used to collect aerosols to determine the aerosol capture amount. The collection is used for gas chromatography to determine the content of nicotine and other chemical substances. At the same time, in order to compare the temperature sensation of consumers when inhaling aerosol-generating products, a thermocouple temperature measurement method was used to fix the thermocouple 1 mm from the center of the smoke outlet of the aerosol-generating products. The thermocouple was connected to the temperature data acquisition system for measuring the inhalation. The temperature of the smoke at the mouth end of the aerosol-generated product when inhaled.

Table 1 Sample aerosol capture volume and outlet flue gas temperature in Example 1

name V ₂ /V ₁ Aerosol capture amount (mg) Flue gas outlet temperature (℃) Sample 1 2.9 31.0 62.1 Sample 2 3.6 32.9 59.2

It can be seen from Table 1 that in Embodiment 1, when other parameters are consistent, reducing the wall thickness of the second cavity 31, that is, increasing the V ₂ /V ₁ value, is beneficial to reducing the thickness of the second cavity 31 Due to the thermal resistance of partial heat transfer, the more sufficient the heat exchange between the flue gas in the second cavity 31 and the external environment is, the better the cooling effect will be. At the same time, the enlargement of the second cavity 31 also reduces the trapping effect of the second lumen section 30 on the smoke, and the aerosol capture amount also increases.

Embodiment 2

Sample 3 includes an aerosol generating substrate 10, a first lumen section 20, a second lumen section 30 and a filter section 40, with a diameter of 7.8mm. The length of the aerosol generating substrate 10 is 13.5mm; the length _L1 of the first lumen section 20 is 12mm, and the wall thickness W1 is 2.1mm; the length _L2 of the second lumen section ₃₀ is 10mm, and the wall thickness _W2 is 1.2mm; The length L ₃ of the filter section 40 is 8 mm. The ratio V 2 _/ V 1 of the volume V ₂ of the second cavity 31 of the second lumen section 30 to the volume V ₁ of the first cavity 21 of the first lumen section ₂₀ is 2.0. Compare Sample 3 to Sample 1.

Table 2 Example 2 Control sample aerosol capture volume and outlet flue gas temperature

name V ₂ /V ₁ Aerosol capture amount (mg) Flue gas outlet temperature (℃) Sample 1 2.9 31.0 62.1 Sample 3 2.0 30.4 64.7

It can be seen from Table 2 that in the comparison between Sample 1 and Sample 3 in Example 2, the wall thickness of the first cavity 21 and the second cavity 31 is kept the same, while the first lumen section 20 and the second tube are adjusted. The relative length of the two parts of the length of the cavity section 30 (the total length remains unchanged) causes the V ₂ /V ₁ ratio to also change. It can be seen from the comparison results that by increasing the length of the second lumen section 30 and reducing the length of the first lumen section 20, the ratio of V ₂ /V ₁ is increased, which also helps to increase the aerosol capture amount and effectively reduces Flue gas outlet temperature. It shows that when the wall thickness of the first cavity 21 and the second cavity 31 remains unchanged, the length of the first cavity section 20 is shortened, which reduces the trapping effect on smoke; while the lengthening of the second cavity section 30, The heat exchange of the flue gas in the second cavity 31 is enhanced, and the cooling effect of the flue gas is improved.

That is to say, under the condition that the total length and outer diameter of the first lumen section 20 and the second lumen section 30 are the same, the cavity volumes of the first lumen section 20 and the second lumen section 30 are adjusted so that V ₂ / The V ₁ ratio is controlled within the set range, which helps to effectively reduce the flue gas outlet temperature. Specifically, the length of the second lumen section 30 is increased or the wall thickness of the second cavity 31 is reduced. That is, while keeping other factors unchanged, the equivalent wall thickness of the second lumen section 30 is reduced to reduce the heat transfer thermal resistance of the cavity wall of the second cavity 31, that is, the value of V ₂ /V ₁ is Increase, can promote the cooling of flue gas. Or, while keeping the total length of the first lumen section 20 and the second lumen section 30 unchanged, reduce the length L ₁ of the first lumen section 20 and increase the length L ₂ of the second lumen section 30 so that V Increasing the ₂ /V ₁ value can also promote flue gas cooling. On the other hand, while increasing the volume of the second cavity 31 of the second lumen section 30, it will also reduce the trapping effect of the material of the second cavity 31 on smoke, ensuring that consumers inhale a sufficient amount of smoke.

To sum up, this embodiment uses a combination of a small-volume first cavity 21 and a large-volume second cavity 31. The wall thickness and strength of the small-volume first cavity 21 can prevent the heating element from being inserted into the aerosol. Axial displacement of the tobacco material that may occur during creation of the matrix. Moreover, when the aerosol generated by heating the aerosol-generating substrate passes through the small-volume first cavity 21 to the large-volume second cavity 31, the pressure decreases, and the sudden change in the flow field is conducive to enhancing the flow of smoke in the second cavity 31. The convection heat transfer promotes the reduction of aerosol temperature and improves the smoking effect and fullness; at the same time, increasing the volume of the second cavity 31 can also reduce the interception of smoke by the second cavity 31, ensuring the taste of the smoke. Improve your smoking experience.

Generally speaking, outlet flue gas temperatures below 65°C are acceptable to most consumers, while those above 70°C are basically unacceptable to consumers. As shown in Embodiment 1 and 2, the technical solution of the embodiment of the present application can make the outlet flue gas temperature lower than 65°C. Therefore, the flue gas temperature can be reduced without drilling or diluting the flue gas, and the outlet can be taken into consideration. The temperature of the smoke is reduced to a temperature suitable for smoking and the taste of the smoke is maintained, thereby improving the smoking experience.

Further, the outer layer of the aerosol-generating product also includes packaging materials for wrapping the outer surfaces of the aerosol-generating matrix 10, the first lumen section 20, the second lumen section 30, and the filter section 40, so that the above four parts are combined. form a whole. Exemplarily, the packaging material includes paper, and the wrapping paper used is preferably made of air-impermeable material. The internal parts of the aerosol-generating product can be combined so that different lengths of wrapping paper can be used in different ways. In another specific implementation, there may be no wrapping paper.

Further, the aerosol-generating matrix 10 includes but is not limited to tobacco substances, aerosol-forming agents, flavor substances, etc., wherein the aerosol-forming agent accounts for at least about 10% by dry weight in the aerosol-generating matrix 10 . Improve the smoking effect.

Tobacco substances include, but are not limited to, shredded tobacco, shredded tobacco flakes, tobacco particles, and combinations thereof. Exemplarily, the aerosol-generating substrate 10 may include, for example, one or more of the following: powders, granules, pellets, chips, thin strips, strips or sheets, materials containing herb leaves, tobacco leaves, tobacco ribs materials, reconstituted tobacco, homogenized tobacco, extruded tobacco, deciduous tobacco and expanded tobacco. The aerosol-generating matrix 10 may be in loose form, or may be provided in a suitable container or cartridge. Optionally, the aerosol-generating substrate 10 may contain additional tobacco or non-tobacco volatile flavor compounds that are released when the substrate is heated. The aerosol-generating substrate 10 may also contain one or more capsules that contain, for example, additional tobacco or non-tobacco volatile flavor compounds, and such capsules may melt during heating of the aerosol-generating substrate 10 .

Specifically, homogeneous tobacco refers to a material formed by agglomerating particulate tobacco. Homogenized tobacco may be in sheet form. It may be formed by agglomerating particulate tobacco obtained by grinding or otherwise pulverizing one or both of tobacco leaves and tobacco stems. Alternatively or additionally, the sheet of homogeneous tobacco material may include one or more of tobacco dust, tobacco fines, and other particulate tobacco by-products formed during, for example, handling, handling, and shipping of tobacco. The sheet of homogeneous tobacco material may include one or more intrinsic binders that are endogenous to the tobacco, one or more extrinsic binders that are extrinsic to the tobacco, or a combination thereof, to help coalesce the particulate tobacco. Alternatively or additionally, the sheet of homogeneous tobacco material may include other additives including, but not limited to, tobacco and non-tobacco fibers, aerosol formers, humectants, plasticizers, flavors, fillers, aqueous solvents and non-aqueous solvents. and combinations thereof.

Suitable extrinsic binders for inclusion in sheets of homogenized tobacco material for use in the aerosol-generating matrix include, but are not limited to: gums such as guar gum, synthetic biopolymer gums, acacia gum, and locust bean gum. . Cellulose binders such as hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose and ethyl cellulose. Polysaccharides such as starch, organic acids such as alginic acid, conjugate base salts of organic acids such as sodium alginate, agar, pectin, and combinations thereof.

Optionally, the aerosol-generating matrix 10 may be provided on or embedded in a thermally stable carrier. The carrier may be in the form of powders, granules, pellets, chips, strips, strips or sheets. Alternatively, the support may be a tubular support with a thin layer of solid matrix deposited on its inner surface or on its outer surface or both. This tubular support may be formed from, for example, paper or paper-like material, nonwoven carbon fiber mat, low mass open mesh or perforated metal foil, or any other thermally stable polymer matrix.

The aerosol-generating matrix 10 can also be deposited on the surface of the carrier, for example in the form of a sheet, foam, gel or slurry. The aerosol-generating matrix 10 may be deposited over the entire surface of the carrier or, alternatively, may be deposited in a pattern to provide non-uniform fragrance delivery during use.

Further, the first lumen section 20, the second lumen section 30 and the filter section 40 are collectively referred to as a filter part. The filter part mainly plays the role of reducing the release of harmful substances and lowering the aerosol temperature. Specifically, the first lumen section 20 and the second lumen section 30 can be two independent lumen sections, or can be two parts of one lumen section with different inner diameters.

Further, the materials of the first lumen section 20 , the second lumen section 30 and the filter section 40 include at least one of the following: acetate fiber tow, propylene fiber tow, polylactic acid fiber tow, paper and polymer. Both the first lumen section 20 and the second lumen section 30 have a cavity structure, which retains less aerosol flowing through the first cavity 21 and the second cavity 31 , thereby ensuring that as much aerosol as possible can pass through and be delivered to consumers. By. The filter section 40 has a solid core structure. On the one hand, it filters harmful substances in the aerosol, such as effectively reducing the release of harmful substances such as NNK, crotonaldehyde, phenol, HCN, ammonia and BaP. Further, the filter section 40 adopts filament bundles with high single denier and low total denier. For example, the single denier of the filament bundles of the filter section 40 is greater than or equal to 10 denier. Further, the single denier of the filament bundles of the filter section 40 is The denier is 22 denier. The total denier of the tows in the filter section 40 is 27,000 denier to 35,000 denier, and further, the total denier is 32,000 denier. The total denier of the tow, also known as the total density of the tow, is a product quality index represented by the weight value of a tow of a certain length. On the premise of ensuring the support strength, using filament bundles with high single denier but relatively low total denier can make the space between the filament bundles in the filter section 40 large and reduce the interception of smoke components. The above settings can enable the filter part to minimize the interception of aroma substances, nicotine and other substances on the premise of reducing harm, ensure the effective release of aroma substances, nicotine and other substances, and ensure that sufficient amounts of smoke components are supplied to consumers.

The embodiments of the present application also disclose a method for preparing an aerosol-generating product, which is used to prepare the above-mentioned aerosol-generating product. Exemplarily, during preparation, the first lumen section 20 , the second lumen section 30 and the filter section 40 are first respectively formed, and then the first lumen section 20 , the second lumen section 30 and the filter section 40 are formed using molding paper. Composite into a three-element composite filter rod, and finally, the three-element composite filter rod and the aerosol-generating matrix 10 are compounded into an aerosol-generating product using tipping paper. The order in which the aerosol generating substrate 10, the first lumen section 20, the second lumen section 30 and the filter section 40 are combined during the preparation process is not limited. In another specific embodiment, the aerosol generating base 10 and the first lumen section 20 are first combined to form a first combined body, the second lumen section 30 and the filter section 40 are combined to form a second combined body, and then the first combined body is formed. The conjugate and the second conjugate are connected to form an aerosol-generating article.

Exemplarily, the forming of the first lumen section 20 and the second lumen section 30 includes the following steps: after the filament bundle is opened and sprayed with triacetin, it is introduced into the filter rod forming cigarette cavity through a high-pressure nozzle, and then the cigarette is formed. The first lumen section 20 and the second lumen section 30 (ie, the hollow filter rod) are formed in the cavity. Specifically, the filter rod molding smoke chamber is composed of two parts, namely a high-temperature steam rapid solidification section and a low-temperature cooling strip rapid cooling and shaping section, and a core rod for hollow filter rod cavity shaping is provided inside the smoke cavity. The core rod has a hollow core structure, and the hollow core rod is located at the center of the filter rod. By changing the cross-sectional shape of the hollow core rod, the cavity structure of different special-shaped hollow core filter rods can be realized.

Embodiments of the present application also disclose an aerosol generation system, including the above-mentioned aerosol generation product and an aerosol generation device. The aerosol generation device includes a heating element. The heating element is used to be inserted into the aerosol generation base 10 to heat the aerosol generation. The substrate 10 in turn generates aerosol.

Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in conjunction with specific embodiments and cannot be deemed to be Specific implementations of the invention are limited only to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims (11)

1. An aerosol-generating article comprising:

an aerosol-generating substrate for generating an aerosol;

a first lumen segment connected to the downstream end of the aerosol-generating substrate, the first lumen segment being provided with a first cavity that is axially through;

the second lumen section is arranged at the downstream end of the first lumen section, a second cavity which is communicated with the second cavity along the axial direction is arranged on the second lumen section, and the first cavity is communicated with the second cavity;

wherein the first cavity and the second cavity are separated from the outside in the radial direction; the volume of the second cavity is greater than the volume of the first cavity, and the second cavity wall thickness is less than the first cavity wall thickness.

2. The aerosol-generating article according to claim 1, further comprising a filter segment connected to a downstream segment of the second lumen segment, wherein the aerosol-generating substrate upon heating is capable of passing through the first lumen segment, the second lumen segment, and the filter segment in sequence.

3. An aerosol-generating article according to claim 1, wherein the volume of the second cavity and the volume of the first cavity satisfy the following condition:

1.5≤V ₂ /V ₁ ≤5

wherein V is ₁ For the volume of the first cavity, V ₂ Is the volume of the second cavity.

4. An aerosol-generating article according to claim 1, wherein the second cavity wall thickness is 1.5mm or less.

5. An aerosol-generating article according to claim 2, wherein the length of the second lumen segment and/or the length of the filter segment is less than or equal to the length of the first lumen segment.

6. The aerosol-generating article according to claim 5, wherein the lengths of the first lumen segment, the second lumen segment, and the filter segment further satisfy the following condition:

L ₃ /(L ₁ +L ₂ )≤0.5

wherein L is ₁ L is the length of the first lumen segment ₂ L is the length of the first lumen segment ₃ Is the length of the filter segment.

7. An aerosol-generating article according to claim 5 or 6, wherein the length of the first lumen segment, the second lumen segment further satisfies the following condition:

L ₂ /L ₁ ≥1.5

wherein L is ₁ L is the length of the first lumen segment ₂ Is the length of the first lumen segment.

8. An aerosol-generating article according to claim 1, wherein the aerosol-generating substrate comprises an aerosol-former in an amount of at least 10% by dry weight of the aerosol-generating substrate.

9. The aerosol-generating article according to claim 2, wherein the material of the first lumen segment, the second lumen segment and the filter segment comprises at least one of: acetate tow, polypropylene tow, polylactic acid tow, and paper.

10. A method of preparing an aerosol-generating article for preparing an aerosol-generating article according to any of claims 2 to 9, comprising the steps of:

the first lumen segment, the second lumen segment and the filter segment are each shaped;

compounding the first lumen section, the second lumen section and the filtering section into a ternary composite filter rod by adopting forming paper;

compounding the ternary composite filter rod with the aerosol-generating substrate into an aerosol-generating article;

wherein the shaping of the first lumen segment and/or the second lumen segment comprises the steps of:

the tow is processed by opening and spraying glyceryl triacetate, and then is introduced into a filter rod forming smoke cavity by a high-pressure nozzle for forming.

11. An aerosol-generating system, comprising:

an aerosol-generating article according to any of claims 1-9;

an aerosol-generating device comprising a heating element for heating the aerosol-generating substrate to generate an aerosol.