CN117652720A - Aerosol generating product, preparation method and aerosol generating system - Google Patents
Aerosol generating product, preparation method and aerosol generating system Download PDFInfo
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- CN117652720A CN117652720A CN202211063035.0A CN202211063035A CN117652720A CN 117652720 A CN117652720 A CN 117652720A CN 202211063035 A CN202211063035 A CN 202211063035A CN 117652720 A CN117652720 A CN 117652720A
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Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
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
Technical Field
The invention relates to the field of tobacco products, in particular to an aerosol generating product, a preparation method and an aerosol generating system.
Background
With the improvement of health consciousness of people, low-harm cigarettes are becoming the trend of future development of tobacco. The principle of the atomized tobacco product is that an aerosol generating substrate (mainly tobacco raw materials) absorbs the external heat provided by a heater, so that the temperature of the aerosol generating substrate is raised and aerosol is released. Because only the aerosol generating substrate is heated instead of being burnt, harmful components generated by high-temperature combustion of tobacco are reduced, and the release amount of side stream smoke and environmental smoke is obviously reduced. Compared with electronic cigarettes, the aerosol generating substrate of the atomized tobacco product takes tobacco materials as main raw materials, and the fragrance of the aerosol generating substrate is more similar to that of traditional cigarettes, so that the aerosol generating substrate is popular with consumers.
At present, the main problems of the atomized tobacco products are poor smoke effect, insufficient fullness, high aerosol inlet temperature and the like. The problems of poor smoke effect, flat smoke taste and the like are mainly related to the structural design of the atomized tobacco products, the formula of aerosol generating matrixes, the flavoring and other factors. The high inlet temperature of the aerosol is mainly caused by the relatively short aerosol passage of the atomized tobacco products, the filtering effect on the aerosol is low, the moisture content in the aerosol is high, and the perceived temperature of consumers is high.
Chinese patent publication No. CN104010531B discloses an aerosol-generating article for use with an aerosol-generating device, which relates to an aerosol-generating article and a method of using an aerosol-generating article. Such aerosol-generating articles comprise an aerosol-forming substrate which is used to generate an inhalable aerosol when heated by an internal heating element of the aerosol-generating device. The aerosol-generating article further comprises a cooling element using an aggregated biodegradable polymeric material, such as an aggregated polylactic acid sheet. However, because of the complex overall structure of the aerosol-generating article and the complex and costly manufacturing, the fabrication of such multi-element aerosol-generating articles generally requires relatively complex manufacturing machinery and process techniques.
The hollow tubular structure is one of the effective means for reducing the aerosol temperature of the atomized tobacco product in combination with ventilation technology. When the mixture of air and aerosol particles flowing through the atomized tobacco product reaches the ventilation zone, external air drawn into the hollow tubular section via the ventilation zone mixes with the aerosol, rapidly reducing the temperature of the aerosol mixture. The venting zone is disposed at a distance from the upstream end of the aerosol-generating article mouthpiece section, and the cooling section is effectively disposed immediately upstream of the mouthpiece, facilitating nucleation and growth of aerosol particles.
As disclosed in publication No. CN113163850a, an aerosol-generating article for generating an inhalable aerosol upon heating is disclosed, the aerosol-generating article comprising: a rod of aerosol-generating substrate and a hollow tubular segment at a location between the rod and the mouth-piece segment. The hollow tubular segment is longitudinally aligned with the rod and the mouth piece segment. Further, the hollow tubular segment defines a cavity extending up to the upstream end of the mouth piece segment. The aerosol-generating article further comprises a ventilation zone at a location along the hollow tubular section 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 comprises at least an aerosol-former, the strip of aerosol-generating substrate having an aerosol-former content of at least about 10% by dry weight. However, the hollow tubular cooling mode adopting the ventilation mode has the effect of diluting the flue gas, so that the experience of consumers is affected, the cost of manufacturing equipment is increased, the process complexity is improved, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to solve the problems that the prior method for reducing the aerosol temperature of the atomized tobacco product has diluted smoke, influences the experience of consumers, has complex process and increases the production cost. The invention provides an aerosol generating product which can reduce the temperature of aerosol without affecting the taste of smoke, improve the experience of consumers, and has simple process and low cost.
To solve the above technical problems, embodiments of the present invention disclose 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 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.
By adopting the technical scheme, the combination of the small cavity structure and the large cavity structure is utilized, namely, the combination of the first cavity volume of the small-volume first cavity section and the large-volume second cavity section is utilized, meanwhile, the wall thickness of the second cavity is smaller than that of the first cavity, so that the pressure of the heated aerosol is reduced when the heated aerosol passes through the first cavity to the second cavity, and the abrupt change of the flow field is beneficial to enhancing the convection heat exchange of the inner wall surface of the second cavity so as to promote the reduction of the temperature of the aerosol; meanwhile, the thinner the wall thickness is, the smaller the thermal resistance corresponding to heat transfer is, so that when the smoke flows through the second cavity, the heat exchange can be fully performed between the wall of the pipe cavity and the external environment, and the cooling effect is further improved. On the other hand, the smoke temperature is simultaneously related to the smoke effect and the plumpness, the smoke temperature is effectively reduced, the condensation and atomization of smoke components can be promoted, and the smoke effect and the plumpness are improved.
As a specific embodiment, the aerosol-generating device further comprises a filtering section connected to the downstream section of the second lumen section, and the aerosol generated by heating the aerosol-generating substrate can sequentially pass through the first lumen section, the second lumen section and the filtering section.
As a specific embodiment, the volume of the second cavity and the volume of the first cavity satisfy the following conditions:
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.
As a specific embodiment, the wall thickness of the second cavity is less than or equal to 1.5mm.
As a specific embodiment, 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.
As a specific embodiment, 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 For the length of the first lumen segment, L 2 For the length of the first lumen segment, L 3 Is the length of the filter segment.
As a specific embodiment, the lengths of the first lumen segment and the second lumen segment also satisfy the following conditions:
L 2 /L 1 ≥1.5
wherein L is 1 For the length of the first lumen segment, L 2 Is the length of the first lumen segment.
As a specific embodiment, the aerosol-generating substrate comprises an aerosol-former in an amount of at least 10% by dry weight of the aerosol-generating substrate.
As a specific embodiment, the materials of the first lumen segment, the second lumen segment and the filtering segment include at least one of the following: acetate tow, polypropylene tow, polylactic acid tow, and paper.
Another embodiment of the present application also discloses a method for preparing an aerosol-generating article, for preparing the aerosol-generating article described above, comprising the steps of:
the first lumen section, the second lumen section and the filtering section are respectively formed;
compounding the first lumen section, the second lumen section and the filter section into a ternary compound filter stick by adopting forming paper;
compounding the ternary composite filter rod with an 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.
Another embodiment of the present application also discloses an aerosol-generating system comprising:
the aerosol-generating article described above;
an aerosol-generating device comprising a heating element for heating an aerosol-generating substrate to generate an aerosol.
Drawings
Fig. 1 shows a schematic structural view of an aerosol-generating article according to an embodiment of the invention;
in the figure: 10-aerosol-generating substrate, 20-first lumen segment, 21-first cavity, 30-second lumen segment, 31-second cavity, 40-filter segment.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present embodiment, it should be noted that, the orientation or positional relationship indicated by the terms "inner", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The present embodiment provides an aerosol-generating article, referring to fig. 1, including an aerosol-generating substrate 10, a first lumen segment 20, a second lumen segment 30, and a filter segment 40, wherein an end of the aerosol-generating article, which is far from a mouth end, is an upstream end, an end, which is near the mouth end, is a downstream end, and the aerosol-generating substrate 10, the first lumen segment 20, the second lumen segment 30, and the filter segment 40 are sequentially disposed from the upstream end to the downstream end (i.e., sequentially disposed along the X direction in fig. 1). Wherein the aerosol-generating substrate 10 is used to generate aerosol consumer puffs. A first lumen segment 20 is connected to the downstream end of the aerosol-generating substrate 10, the first lumen segment 20 being provided with a first cavity 21 extending axially therethrough. A second lumen segment 30 is connected to the downstream end of the first lumen segment 20, the second lumen segment 30 being provided with a second cavity 31 extending axially therethrough. The first cavity 21 and the second cavity 31 form a flue gas channel. After the aerosol-generating substrate 10 is heated to generate smoke, the smoke sequentially passes through the first lumen section 20, the second lumen section 30 and the filtering section 40, and the filtering section 40 is of a non-cavity structure and is used for filtering harmful substances in the smoke. In this embodiment, the first cavity 21 and the second cavity 31 are isolated from the outside in the radial direction, i.e., the first cavity 21 and the second cavity 31 do not have ventilation features; and the wall thickness of the second cavity 31 is smaller than the wall thickness of the first cavity 21, the volume of the second cavity 31 being larger than the volume of the first cavity 21.
In another embodiment, the aerosol-generating substrate 10, the first lumen segment 20, the filter segment 40 and the second lumen segment 30 are arranged in sequence along the upstream end to the downstream end of the aerosol-generating article, i.e. after the aerosol-generating substrate 10 is heated to generate a smoke, the smoke passes through the first lumen segment 20, the filter segment 40 and the second lumen segment 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 three parts, i.e., convection heat exchange of the inner wall surface of the cavity, heat conduction in the wall, and convection heat exchange of the outer wall surface and the environment. By adopting the technical scheme, the combination of the small cavity structure and the large cavity structure is utilized, namely, the mode that the first cavity 21 of the small-volume first cavity section 20 is combined with the large-volume second cavity section 30 is utilized, meanwhile, the wall thickness of the second cavity 31 is smaller than that of the first cavity 21, so that the pressure of the heated aerosol is reduced when the heated aerosol passes through the first cavity 21 to the second cavity 31, and the abrupt change of the flow field is beneficial to enhancing the convection heat exchange of the inner wall surface of the second cavity 31 so as to promote the reduction of the temperature of the aerosol; meanwhile, the thinner the wall thickness is, the smaller the thermal resistance corresponding to heat transfer is, so that when the smoke flows through the second cavity 31, the heat exchange can be fully performed between the pipe cavity wall and the external environment, and the cooling effect is further improved. On the other hand, the smoke temperature is simultaneously related to the smoke effect and the plumpness, the smoke temperature is effectively reduced, the condensation and atomization of smoke components can be promoted, and the smoke effect and the plumpness are improved.
In addition, as described above, the combination of the small cavity structure and the large cavity structure can be used to effectively cool the flue gas, and no perforation is required on the first cavity section 20 or the second cavity section 30, that is, the first cavity 21 and the second cavity 31 are radially separated from the outside. On the other hand, the first lumen segment 20 and the second lumen segment 30 are both hollow structures, so that the interception of the aerosol flowing through is less, and the aerosol can be ensured to pass through and be delivered to consumers as much as possible.
Specifically, the inner diameter of the first cavity 21 may be set according to the diameter of the tobacco segment, so as to prevent the heating element from being inserted into the aerosol-generating substrate 10, and the first cavity 21 has an excessively large inner diameter, so that the aerosol-generating substrate 10 is axially displaced, and even the tobacco material in the aerosol-generating substrate 10 is loose, which is not beneficial for heat transfer between the tobacco materials.
Illustratively, the first cavity 21 and the second cavity 31 have cross-sectional shapes including, but not limited to, circular, oval, star-shaped. The first cavity 21 and the second cavity 31 may have the same cross-sectional shape or may have different cross-sectional shapes, and are not limited thereto.
Further, the volume of the second cavity 31 and the volume of the first cavity 21 satisfy the following condition: v is more than or equal to 1.5 2 /V 1 Not more than 5, wherein V 1 For the volume of the first cavity 21, V 2 Is the volume of the second cavity 31. The ratio of the volume of the second cavity 31 to the volume of the first cavity 21 is mainly in the range of the second cavity 31 inner diameter and the axial length of the first lumen segment 20 and/or the second lumen segment 30. Illustratively, the first cavity has an inner diameter of 2.5mm to 4.5mm and the second cavity has an inner diameter of 3.5mm to 6mm. The outer diameters of the first cavity and the second cavity (i.e. the outer diameter of the aerosol-generating article) are not limited.
Illustratively, neither the first lumen segment 20 nor the second lumen segment 30 has a length of less than 5mm to facilitate processing and to ensure stable length.
Illustratively, the first cavity 21 has a wall thickness W 1 The wall thickness of the second cavity 31 is W 2 W is then 1 >W 2 ，W 2 Less than or equal to 1.5mm. Preferably, W 2 Less than or equal to 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 comprises the convection heat exchange of the inner wall surface of the cavity, the heat conduction in the wall and the heat conductionWhen the convection heat exchange between the outer wall surface and the environment is similar to the smoking environment, the convection heat exchange coefficients of the inner wall and the outer wall of the first cavity 21 and/or the second cavity 31 are not greatly different. The heat conductivity coefficient of the thin-wall material is lower, so that the cooling effect is mainly dominated by the wall thickness of the thin wall, the thinner the wall thickness is, the smaller the heat resistance corresponding to heat transfer is, the more sufficient the heat exchange between the flue gas in the cavity and the external environment is, and the better the cooling effect is. Therefore, decreasing the wall thickness of the second cavity 31, i.e. increasing the inner diameter of the second cavity 31, facilitates reducing the aerosol temperature.
Meanwhile, as mentioned above, the wall of the first lumen segment 20 needs to have the function of supporting the aerosol-generating substrate 10, and the inner diameter of the first cavity 21 is too large, so that the aerosol-generating substrate 10 is easy to axially displace when heated, even the tobacco material in the aerosol-generating substrate 10 is loose, which is not beneficial to heat transfer between the tobacco materials, so that the inner diameter of the first cavity 21 is not too large. However, too small an inner diameter of the first cavity 21 may result in too much aerosol being trapped in the wall of the first lumen segment 20, affecting the smoke taste. Therefore, the relative ratio of the first cavity 21 to the second cavity 31 needs to be within a certain range to reduce the temperature of the smoke and ensure the taste of the smoke, and prevent the displacement of the aerosol-generating substrate 10.
In particular, the wall thickness of the second cavity 31 is the minimum distance measured between its outer wall and the inner cavity wall. In practice, the distance at a given location is measured in a direction substantially perpendicular to the outer wall of the second cavity 31 and the inner cavity wall. For cavity elements having a substantially circular cross-section, the distance is measured substantially along the radial direction of the second cavity 31.
Illustratively, in this embodiment, the lengths of the first lumen segment 20, the second lumen segment 30, and the filter segment 40 also satisfy the following conditions: l (L) 1 ≤L 2 ，L 3 ≤L 2 That is, the length of the second lumen segment 30 is greater than the lengths of the first lumen segment 20 and the filter segment 40, respectively. Further satisfy, L 3 /(L 1 +L 2 ) And 0.5, i.e., the sum of the lengths of the first and second lumen segments 20, 30 is greater than twice the length of the filter segment 40. Preferably L 2 /L 1 ≥1.5。
Wherein, the firstA lumen segment 20 of length L 1 The second lumen segment 30 has a length L 2 The length of the filter stage 40 is L 3 。
So set up for the length of second lumen section 30 increases, consequently increases the heat transfer time of flue gas in the second lumen, can realize the better cooling of flue gas.
The comparison of aerosol-capture amounts and flue gas outlet temperatures at different parameters of the aerosol-generating articles of the embodiments of the present application is specifically described below.
Example 1
Sample 1 comprises an aerosol-generating substrate 10, a first lumen segment 20, a second lumen segment 30 and a filter segment 40, having a diameter of 7.8mm. The aerosol-generating substrate 10 has a length of 13.5mm, the first lumen segment 20 has a length L 1 10mm wall thickness W 1 2.1mm; second lumen segment 30 length L 2 Is 12mm in wall thickness W 2 1.2mm; the length L3 of the filter stage 40 is 8mm. Volume V of second cavity 31 of second lumen segment 30 2 Volume V of first cavity 21 with first lumen segment 20 1 Ratio V of (V) 2 /V 1 2.9.
Sample 2 comprises an aerosol-generating substrate 10, a first lumen segment 20, a second lumen segment 30 and a filter segment 40, having a diameter of 7.8mm. The aerosol-generating substrate 10 is 13.5mm in length; first lumen segment 20 length L 1 10mm wall thickness W 1 2.1mm; second lumen segment 30 length L 2 Is 12mm in wall thickness W 2 0.85mm; length L of filter stage 40 3 8mm. Volume V of second cavity 31 of second lumen segment 30 2 Volume V of first cavity 21 with first lumen segment 20 1 Ratio V of (V) 2 /V 1 3.6.
The aerosol-generating article described above is used in combination with a heated smoking article, and in order to ensure consistency of smoking conditions when comparing the effects of samples of the aerosol-generating article, a smoking machine is used and tested under certain parameters, one of the following smoking methods being exemplified: the atomized tobacco products are respectively placed into the same heating smoking set for smoking, and parameters of a smoking machine are set (for example, the smoking scheme is Canadian deep smoking method, and the smoking capacity is 55 mL). The heating smoking set is pressed for 2.4s, the first mouth is sucked after 14.6s interval, each mouth is sucked for 2s interval, the next mouth is sucked after 28 seconds interval, the trapping is finished after the 8 th mouth is sucked, and 8 mouths of aerosol are trapped in each cigarette. Heating means for heating the smoking set include, but are not limited to, electrical heating, electromagnetic heating, and infrared heating.
In order to compare the atomization effect of the aerosol-generating article with the amount of chemicals absorbed by the smoker from the aerosol, the aerosol was collected using a glass filter smoke trap for measuring the amount of aerosol trapped, and the aerosol trap was used for measuring the content of nicotine and other chemicals by gas chromatography. Meanwhile, in order to compare the temperature feeling of sucking the aerosol-generating product by a consumer, a thermocouple is fixed at the center of the smoke outlet of the aerosol-generating product by adopting a thermocouple temperature measurement method, and the thermocouple is connected with a temperature data acquisition system and is used for measuring the temperature of the smoke at the mouth end outlet of the aerosol-generating product during sucking.
Table 1 sample aerosol capture amount and exit flue gas temperature in example 1
| Name of the name | V 2 /V 1 | Aerosol trapping amount (mg) | Flue gas outlet temperature (DEG C) |
| Sample 1 | 2.9 | 31.0 | 62.1 |
| Sample 2 | 3.6 | 32.9 | 59.2 |
As can be seen from Table 1, in example 1, the wall thickness of the second cavity 31, i.e., V, was reduced with other parameters being consistent 2 /V 1 The value increases, is favorable to reducing the thermal resistance of the heat transfer of second cavity 31 part, and the more abundant the heat transfer between flue gas and the external environment in the second cavity 31, the better the cooling effect. At the same time, the increase of the second cavity 31 also reduces the interception of the smoke by the second lumen segment 30, and the aerosol capturing amount is also increased.
Example two
Sample 3 comprises an aerosol-generating substrate 10, a first lumen segment 20, a second lumen segment 30 and a filter segment 40, having a diameter of 7.8mm. The aerosol-generating substrate 10 is 13.5mm in length; first lumen segment 20 length L 1 Is 12mm in wall thickness W 1 2.1mm; second lumen segment 30 length L 2 10mm wall thickness W 2 1.2mm; length L of filter stage 40 3 8mm. Volume V of second cavity 31 of second lumen segment 30 2 Volume V of first cavity 21 with first lumen segment 20 1 Ratio V of (V) 2 /V 1 2.0. Sample 3 was compared to sample 1.
Table 2 example 2 control sample aerosol capture amount and exit flue gas temperature
| Name of the name | V 2 /V 1 | Aerosol trapping amount (mg) | Flue gas outlet temperature (DEG C) |
| Sample 1 | 2.9 | 31.0 | 62.1 |
| Sample 3 | 2.0 | 30.4 | 64.7 |
As can be seen from Table 2, in example 2, the comparison of sample 1 and sample 3 was made by keeping the wall thickness of the first cavity 21 and the second cavity 31 the same, and adjusting the relative lengths of the two parts of the lengths of the first lumen segment 20 and the second lumen segment 30 (the total length is unchanged) so that V 2 /V 1 The ratio also changes. From the comparison, it can be seen that by increasing the length of the second lumen segment 30, the length of the first lumen segment 20 is reduced such that V 2 /V 1 The increase of the ratio is also beneficial to improving the trapping amount of the aerosol and effectively reducing the temperature of the smoke outlet. It is explained that the length of the first lumen segment 20 is shortened and the trapping effect on smoke is reduced under the condition that the wall thickness of the first cavity 21 and the second cavity 31 is unchanged; and the lengthening of the second lumen section 30 enhances the heat exchange of the flue gas in the second cavity 31 and improves the cooling effect of the flue gas.
That is, the cavity volumes of the first and second lumen segments 20, 30 are adjusted so that V, provided the total length and outer diameter of the first and second lumen segments 20, 30 are the same 2 /V 1 The ratio is controlled in a set range, which is helpful for effectively reducing the temperature of the flue gas outlet. In particular by increasing the length of the second lumen segment 30 or by decreasing the wall thickness of the second cavity 31. That is, while keeping the other factors unchanged, the equivalent wall thickness of the second lumen segment 30 is reduced to reduce the heat transfer resistance of the lumen wall of the second cavity 31, i.e., to let V 2 /V 1 The value is increased, and the flue gas temperature reduction can be promoted. Or alternatively, the first and second heat exchangers may be,while maintaining the overall length of the first and second lumen segments 20, 30 constant, the first lumen segment 20 length L is reduced 1 Increasing the length L of the second lumen segment 30 2 Make V 2 /V 1 The value is increased, and the flue gas temperature reduction can be promoted. On the other hand, the volume of the second cavity 31 of the second lumen segment 30 is increased, and meanwhile, the interception effect of the second cavity 31 material on smoke is reduced, so that the sufficient amount of the smoke inhaled by a consumer is ensured.
In summary, the present embodiment adopts a combination of the small-volume first cavity 21 and the large-volume second cavity 31, and the wall thickness and strength of the small-volume first cavity 21 can avoid the axial displacement of the tobacco material that may occur during the insertion of the heating element into the aerosol-generating substrate. The pressure of the generated aerosol after the aerosol generating substrate is heated is reduced when the aerosol passes through the small-volume first cavity 21 to the large-volume second cavity 31, the abrupt change of the flow field is beneficial to enhancing the convection heat exchange of the smoke in the second cavity 31 so as to promote the reduction of the temperature of the aerosol, and the fuming effect and the fullness are improved; meanwhile, the volume of the second cavity 31 is increased, so that interception of smoke can be reduced by the second cavity 31, the taste of the smoke is guaranteed, and the suction experience is improved.
Generally, outlet flue gas temperatures below 65 ℃ are acceptable to most consumers, and above 70 ℃ are substantially unacceptable to consumers. As shown in the first embodiment and the second embodiment, the technical scheme of the embodiment of the application can enable the temperature of the outlet flue gas to be lower than 65 ℃, so that the temperature of the flue gas can be reduced without punching and diluting the flue gas, the temperature of the outlet flue gas can be reduced to a temperature suitable for suction and the taste of the flue gas can be kept, and the effect of improving the suction experience is achieved.
Further, the outer layer of the aerosol-generating article further comprises a wrapper for wrapping the outer surfaces of the aerosol-generating substrate 10, the first lumen segment 20, the second lumen segment 30 and the filter segment 40 such that the four parts are combined into one piece. Illustratively, the wrapper comprises paper, preferably a gas impermeable material. The interior of the aerosol-generating article may be formed by combining the parts so that wrapping papers of different lengths may be used differently in the manner described above. In another implementation, the wrapper may be absent.
Further, the aerosol-generating substrate 10 includes, but is not limited to, tobacco material, aerosol-forming agents, flavor materials, and the like, wherein the aerosol-forming agents comprise at least about 10% by dry weight of the aerosol-generating substrate 10 to enhance the smoke generating effect.
Tobacco materials include, but are not limited to, cut filler, tobacco flake, tobacco particles, and combinations thereof. Illustratively, the aerosol-generating substrate 10 may comprise, for example, one or more of the following: powders, granules, pellets, chips, strips, bars or sheets, the material comprising herbal leaves, tobacco ribs, reconstituted tobacco, homogenized tobacco, extruded tobacco, defoliated tobacco and expanded tobacco. The aerosol-generating substrate 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 flavour compounds that are released upon heating of the substrate. The aerosol-generating substrate 10 may also contain one or more capsules, for example comprising additional tobacco or non-tobacco volatile flavour compounds, and such capsules may melt during heating of the aerosol-generating substrate 10.
Specifically, homogenized tobacco refers to a material formed by agglomerating particulate tobacco. The homogenized tobacco may be in the form of a sheet. It may be formed by agglomerating particulate tobacco obtained by grinding or otherwise pulverizing one or both of tobacco lamina and tobacco leaf stems. Alternatively or additionally, the sheet of homogenized tobacco material may comprise one or more of tobacco dust, tobacco fines and other particulate tobacco byproducts formed during, for example, the handling, handling and transportation of tobacco. The sheet of homogenized tobacco material may include one or more intrinsic binders that are endogenous binders to the tobacco, one or more extrinsic binders that are exogenous binders to the tobacco, or a combination thereof, to help agglomerate the particulate tobacco. Alternatively or additionally, the sheet of homogenized tobacco material may include other additives including, but not limited to, tobacco and non-tobacco fibers, aerosol formers, humectants, plasticizers, flavorants, fillers, aqueous and non-aqueous solvents, and combinations thereof.
Suitable extraneous binders for inclusion in the sheet of homogenized tobacco material for use in the aerosol-generating substrate include, but are not limited to: gums such as guar gum, synthetic biopolymer gum, gum arabic and locust bean gum. Cellulosic 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 substrate 10 may be provided on or embedded in a thermally stable carrier. The carrier may be in the form of a powder, granules, pellets, chips, strands, bars or sheets. Alternatively, the carrier may be a tubular carrier with a thin layer of solid matrix deposited on its inner surface or on its outer surface or on both its inner and outer surfaces. The tubular support may be formed of, for example, paper or paper-like material, a non-woven carbon fiber mat, a low mass open mesh wire mesh or perforated metal foil, or any other thermally stable polymer matrix.
The aerosol-generating substrate 10 can also be deposited on the surface of a carrier in the form of, for example, a sheet, foam, gel or slurry. The aerosol-generating substrate 10 may be deposited over the entire surface of the carrier or, alternatively, may be deposited in a pattern so as to provide non-uniform flavour delivery during use.
Further, the first lumen segment 20, the second lumen segment 30, and the filter segment 40 are collectively referred to as a filter portion. The filter portion mainly functions to reduce the release of harmful substances and to reduce the temperature of the aerosol. Specifically, the first lumen segment 20 and the second lumen segment 30 may be two independent lumen segments, or may be two portions with different inner diameters in one lumen segment.
Further, the materials of the first lumen segment 20, the second lumen segment 30, and the filter segment 40 include at least one of acetate tow, polypropylene tow, polylactic acid tow, paper, and polymers. Both the first lumen segment 20 and the second lumen segment 30 are hollow structures, so that aerosol flowing through the first cavity 21 and the second cavity 31 is less trapped, and aerosol can be ensured to pass through and be delivered to consumers as much as possible. The filter section 40 has a solid structure, and on the one hand, filters harmful substances in the aerosol, for example, effectively reduces the release of NNK, crotonaldehyde, phenol, HCN, ammonia, baP and other harmful substances. Further, the filter stage 40 employs a high single denier low total denier tow, illustratively, the filter stage 40 tow has a single denier of 10 denier or greater, and further, the filter stage 40 tow has a single denier of 22 denier. The total denier of the filament bundles of filter segment 40 is 27000 denier to 35000 denier, further, 32000 denier. The total denier of a tow, also known as the tow bus density, is a product quality indicator expressed in terms of the weight value of a length of tow. Under the premise of ensuring the supporting strength, tows with high Shan Dan number and relatively low total denier can lead the inter-tow spacing space of the filtering section 40 to be large so as to reduce the interception of smoke components. By the arrangement, the interception of substances such as aroma substances, nicotine and the like to the filter tip part can be reduced as much as possible on the premise of reducing harm, the effective release of the substances such as the aroma substances, the nicotine and the like is ensured, and a sufficient amount of smoke components are ensured to be supplied to consumers.
The embodiment of the application also discloses a preparation method of the aerosol-generating product, which is used for preparing the aerosol-generating product. Illustratively, in preparation, the first lumen segment 20, the second lumen segment 30, and the filter segment 40 are each formed first, then the first lumen segment 20, the second lumen segment 30, and the filter segment 40 are combined into a ternary composite filter rod using forming paper, and finally the ternary composite filter rod is combined with the aerosol-generating substrate 10 using tipping paper to form an aerosol-generating article. The order of bonding of the aerosol-generating substrate 10, the first lumen segment 20, the second lumen segment 30 and the filter segment 40 during the manufacturing process is not limited. In another embodiment, the aerosol-generating substrate 10 and the first lumen segment 20 are joined to form a first bond, the second lumen segment 30 and the filter segment 40 are joined to form a second bond, and the first bond and the second bond are joined to form the aerosol-generating article.
Illustratively, the shaping of the first and second lumen segments 20, 30 includes the steps of: after the tows are opened and sprayed with the glyceryl triacetate, the tows are introduced into a filter rod forming cigarette cavity by a high-pressure nozzle, and the forming of the first tube cavity section 20 and the second tube cavity section 30 (namely the hollow filter rod) is realized in the forming cigarette cavity. Specifically, the filter rod forming cigarette cavity consists of two parts, namely a high-temperature steam rapid solidification section and a low-temperature cooling strip rapid cooling shaping section, and a core rod for shaping a hollow filter rod cavity is arranged in the cigarette cavity. The core rod is of a hollow structure, the hollow core rod is positioned at the center of the filter rod, the cross-sectional shape of the hollow core rod is changed, and the cavity structure of different special-shaped hollow filter rods can be realized.
The embodiment also discloses an aerosol-generating system comprising the aerosol-generating article and an aerosol-generating device as described above, the aerosol-generating device comprising a heating element for insertion into the aerosol-generating substrate 10 to heat the aerosol-generating substrate 10 to generate an aerosol.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present 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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211063035.0A CN117652720A (en) | 2022-08-31 | 2022-08-31 | Aerosol generating product, preparation method and aerosol generating system |
| PCT/CN2023/098906 WO2024045751A1 (en) | 2022-08-31 | 2023-06-07 | Aerosol generating product and preparation method therefor, and aerosol generating system |
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| CN202211063035.0A CN117652720A (en) | 2022-08-31 | 2022-08-31 | Aerosol generating product, preparation method and aerosol generating system |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2921065A1 (en) * | 2015-03-31 | 2015-09-23 | Philip Morris Products S.a.s. | Extended heating and heating assembly for an aerosol generating system |
| CN106954893A (en) * | 2017-05-09 | 2017-07-18 | 云南中烟新材料科技有限公司 | A kind of compound electrical heating of quaternary is not burnt cigarette |
| CN108113051B (en) * | 2017-12-07 | 2019-03-12 | 共青城道乐投资管理合伙企业（有限合伙） | Cigarette filter is not burnt in a kind of heating and heating is not burnt cigarette |
| US20210244083A1 (en) * | 2018-10-29 | 2021-08-12 | Nerudia Limited | Smoking substitute consumable |
| WO2020128043A1 (en) * | 2018-12-20 | 2020-06-25 | Philip Morris Products S.A. | Aerosol-generating article having a ventilated cavity |
| CN110292207A (en) * | 2019-03-21 | 2019-10-01 | 重庆中烟工业有限责任公司 | Aerosol cooling filter element and low temperature cigarette |
| CN109998158A (en) * | 2019-04-28 | 2019-07-12 | 云南中烟工业有限责任公司 | It is a kind of for heating the cigarette for the cigarette that do not burn |
| CN211129720U (en) * | 2019-07-05 | 2020-07-31 | 博颉(上海)管理咨询有限公司 | Smoke cooling filter rod and smoke generating product |
| KR20220110533A (en) * | 2019-12-03 | 2022-08-08 | 필립모리스 프로덕츠 에스.에이. | Aerosol-generating elements comprising filters having a high content of polyhydroxyalkanoate polymers or copolymers |
| CN113662240A (en) * | 2021-09-23 | 2021-11-19 | 云南中烟工业有限责任公司 | Puncture type cigarette core section perfuming aerosol generating product |
| CN218527704U (en) * | 2022-08-31 | 2023-02-28 | 上海烟草集团有限责任公司 | Aerosol generating article and aerosol generating system |
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