Heated cigarette

Abstract

A heat stick (100) of a heated tobacco product. The diameter of the heat stick is 5-7 mm, air holes (10) are formed in the heat stick, and the air holes pass through the heat stick in the radial direction of the heat stick. Each air hole is composed of air hole units (20), at least one air hole is a composite air hole (30), and the composite air hole is formed by at least partially overlapping two air hole units. In addition, a punching method for a heat stick of a heated tobacco product is further provided. According to the heat stick of a heated tobacco product and the punching method therefor, the cooling effect of the heat stick on vapor can be better guaranteed, and the structural strength of the heat stick is better guaranteed, such that the heat stick is not prone to being broken by force.

Description

Heated cigarette and heated cigarette punching method

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 12, 2022, with application number 202211247715.8 and invention name “A heated cigarette and a method for punching heated cigarettes”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of novel tobacco products, and in particular to a heated cigarette and a method for punching a heated cigarette. Background Art

[0003] As a new type of tobacco product, heated cigarettes have become a major research direction in the tobacco industry because they avoid the production of tar and a large number of harmful compounds caused by high-temperature combustion of tobacco, thereby reducing the harmful chemical components and biological toxicity of smoke.

[0004] Heated cigarettes typically consist of a heated smoking device and a cigarette. During smoking, the tobacco section of the cigarette is inserted into the heating chamber of the heated smoking device, where it is heated by a heating element. While the smoke produced by heated cigarettes is inherently cooler than that of traditional cigarettes, due to its higher water content and shorter smoke path, the perceived temperature of the mainstream smoke reaching the mouth is higher than that of traditional cigarettes. Therefore, heated cigarettes require a smoke cooling function. Currently, this is achieved by providing air holes in the heated cigarettes, through which cool air is introduced.

[0005] However, existing heated cigarettes are generally categorized by diameter: those greater than 7mm and those between 5-7mm. Cigarettes with a diameter of 5-7mm, due to their smaller diameter, experience higher atomized smoke temperatures and greater cooling pressure. Consequently, they typically have far more pores than those with a diameter greater than 7mm. However, excessive pore counts and a small circumference can easily cause 5-7mm cigarettes to break during use, affecting proper smoking.

[0006] Summary of the Invention

[0007] In response to the technical problem that in existing heated cigarettes with a diameter of 5-7 mm, excessive number of openings and an excessively small circumference easily lead to the cigarette breaking under stress during use, thus affecting the normal smoking of the cigarette, the present invention provides a heated cigarette in which at least one of the openings is a composite opening, which is formed by the partial overlap of at least two pore units. This increases the pore volume of a single pore, allowing a single pore to introduce more cold air, thereby enhancing the cooling effect of a single pore. This reduces the number of openings required on the heated cigarette, minimizes the impact of the openings on the strength of the heated cigarette, and makes the heated cigarette less likely to break under stress during use, thereby ensuring the normal smoking of the heated cigarette.

[0008] A heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm, and the cigarette is provided with air holes, the air holes penetrating the cigarette in a radial direction;

[0009] The pores are composed of pore units, and at least one of the pores is a composite pore, which is formed by at least two pore units partially overlapping.

[0010] Preferably, a plurality of the air holes are provided on the cigarette, and all the air holes provided on the cigarette are composite air holes.

[0011] Preferably, along the punching direction of the composite pores on the cigarette, the composite pores at the head and the composite pores at the tail have the same shape and structure, and the composite pores between the composite pores at the head and the composite pores at the tail have the same shape and structure.

[0012] Preferably, all the air holes are distributed at equal intervals along the circumference of the cigarette.

[0013] Preferably, the centers of all the air hole units are located on the same plane, and the plane is perpendicular to the axis of the cigarette support.

[0014] Preferably, the diameter of the cigarette is 6-7 mm, and the number of the air holes opened on the cigarette is no more than 8;

[0015] Alternatively, the diameter of the cigarette is 5-6 mm, and the number of the air holes provided on the cigarette is no more than 6.

[0016] Preferably, the cigarette comprises a tobacco segment and a filter rod segment connected to the tobacco segment, and the air holes are opened in the filter rod segment.

[0017] A method for punching holes in heated cigarettes, comprising the following steps:

[0018] S1. Providing a heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm;

[0019] S2. Determining the parameters of the air holes required to be opened on the cigarette;

[0020] S3. According to the pore parameters determined in step S2, the pores are opened in the cigarette along the radial direction of the cigarette, wherein the pores are composed of pore units, and at least one of the pores is a composite pore, and the composite pore is composed of at least two partially overlapping pore units.

[0021] Preferably, the pores are formed in step S3 by using a laser drilling device, and the pores formed in step S3 are all composite pores;

[0022] The pore parameters in step S2 include the number of pores required to be opened, the number of pore units included in the composite pores, the coordinated length coefficient, and the pulse time.

[0023] Preferably, step S2 includes the following steps:

[0024] S21, determining the number of air holes required to be provided on the cigarette;

[0025] S22, determining the number n of pore units and the length coefficient α% contained in the composite pores, wherein the numerical ratio of the number n of pore units to the length coefficient α% is within the following range: 3.5<α / n<7.5;

[0026] S23. Determine the pulse time of a single pore unit.

[0027] Compared to the prior art, the heated cigarette provided by the present invention has air holes formed on the cigarette, and the air holes penetrate the cigarette in the radial direction of the cigarette; wherein the air holes are composed of air hole units, and at least one of the air holes is a composite air hole, and the composite air hole is composed of at least two air hole units partially overlapping. Because at least one of the air holes formed on the heated cigarette is a composite air hole, and the composite air hole is composed of two air hole units partially overlapping, the pore volume of the single air hole is increased, allowing the single air hole to introduce more cold air, thereby increasing the cooling effect of the single air hole. This reduces the number of air holes required on the heated cigarette, minimizes the impact of the air holes on the strength of the heated cigarette, and makes the heated cigarette less likely to break under stress during use, ensuring normal smoking of the heated cigarette. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a schematic structural diagram of a heated cigarette provided by an embodiment;

[0030] FIG2 is a schematic structural diagram of composite air holes in one embodiment of the heated cigarette shown in FIG1 ;

[0031] FIG3 is a schematic structural diagram of composite air holes in another embodiment of the heated cigarette shown in FIG1 ;

[0032] FIG4 is a schematic structural diagram of composite air holes in another embodiment of the heated cigarette shown in FIG1 . DETAILED DESCRIPTION

[0033] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0034] It should be noted that when a component is referred to as being “fixed on”, “mounted on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is “connected” to another component, or a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0038] The present invention provides a heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm, and the cigarette is provided with air holes, which penetrate the cigarette in a radial direction of the cigarette; wherein the air holes are composed of air hole units, and at least one of the air holes is a composite air hole, and the composite air hole is composed of at least two air hole units partially overlapping. Because at least one of the air holes provided on the heated cigarette is a composite air hole, and the composite air hole is composed of two air hole units partially overlapping, the pore volume of each air hole is increased, allowing each air hole to introduce more cold air, thereby increasing the cooling effect of each air hole. This reduces the number of air holes required on the heated cigarette, minimizes the impact of the air holes on the strength of the heated cigarette, and makes the heated cigarette less likely to break under stress during use, ensuring normal smoking of the heated cigarette.

[0039] Please refer to Figure 1. This embodiment provides a heated cigarette 100, wherein the diameter of the cigarette 100 is between 5 and 7 mm.

[0040] The cigarette 100 is provided with air holes 10, which extend radially through the cigarette 100. The air holes 10 are composed of air hole units 20, with at least one of the air holes 10 being a composite air hole 30. The composite air hole 30 is formed by at least two air hole units 20 partially overlapping. Partial overlap means that the two air hole units 20 are interconnected, but do not completely overlap. This allows the composite air hole 30 to have a larger volume than a single air hole unit 20, while also requiring less space in the cigarette 100 than two separate air hole units 20.

[0041] That is, the cigarette 100 is provided with at least one air hole 10, and at least one of the air holes 10 is a composite air hole 30. Because the composite air hole 30 is composed of at least two air hole units 20, the number of air holes 10 required on the cigarette 100 can be reduced. This ensures a cooling effect while minimizing the impact of the air holes 10 on the structural strength of the cigarette 100. This prevents the cigarette 100 from being easily broken during use, thereby better ensuring normal smoking of the cigarette 100.

[0042] It is understandable that the size of the overlapping area between the two pore units 20 in the composite pore 30 will affect the ventilation effect of the composite pore 30. As shown in FIG2 , when the overlapping area between the two pore units 20 is small, the ventilation area of ​​the composite pore 30 is relatively large. As shown in FIG3 , when the overlapping area between the two pore units 20 is large, the ventilation area of ​​the composite pore 30 is relatively small. Moreover, as shown in FIG4 , the number of the pore units 20 included in the composite pore 30 can also affect the ventilation area of ​​the composite pore 30. Therefore, according to the actual required ventilation rate, the composite pore 30 can be appropriately adjusted, such as adjusting the size of the overlapping area between each pore unit 20, the number of pore units 20 set, etc.

[0043] It is understandable that in the field of heated cigarettes, although the temperature of the smoke produced by heated cigarettes is lower than that of traditional cigarettes, due to the higher water content of the smoke and the shorter smoke path, the sensory temperature of the mainstream smoke reaching the mouth is higher than that of traditional cigarettes. Therefore, heated cigarettes need to have the function of cooling the smoke. At present, the smoke is cooled by opening air holes on the heated cigarettes, and then introducing cold air through the air holes. According to the different diameter specifications, heated cigarettes can generally be divided into cigarettes with a diameter greater than 7mm and cigarettes with a diameter between 5-7mm. The atomized smoke temperature of cigarettes with a diameter between 5-7mm is higher, and the cooling operation space using the structure or material in the filter rod is too small. Therefore, the existing technology generally adopts the online punching method to introduce external cold air to neutralize the high-temperature smoke temperature. At the same time, cigarettes with a diameter between 5-7mm have greater cooling pressure, and the number of holes on the filter rod is generally much more than that of cigarettes with a diameter greater than 7mm (often more than 10 or 15). Too many holes and too small a circumference can easily cause the cigarette to break under stress during use.

[0044] At the same time, the applicant's research found that since the atomized smoke of cigarettes with a diameter between 5-7 mm mostly uses peripheral heating (inner core), the smoke temperature at the same axial position in the filter rod is high on the outside and low on the inside. The introduction of holes makes it easier for gaseous moisture and glycerin to mix with the high temperature difference of the external cold air, promoting nucleation atomization. Therefore, punching holes in a certain interval on the filter rod also has the effect of increasing the smoke concentration.

[0045] In the cigarette 100 provided in this embodiment, the composite air holes 30 are provided on the cigarette 100, thereby increasing the pore volume of a single air hole, allowing a single air hole to introduce more cold air, thereby better regulating the smoke temperature and concentration. This also reduces the total number of air holes 10 required to be provided on the cigarette 100, and avoids as much as possible the influence of the air holes 10 on the structural strength of the cigarette 100, so that the cigarette 100 is not easily broken by force during use, thereby better ensuring the normal smoking of the cigarette 100.

[0046] It should be noted that conventional laser perforation equipment is used to perforate cigarettes. Laser perforation equipment can only form one pore unit on a cigarette at a time. Specifically, with current cigarette perforation processes, only a small circular hole can be formed on a cigarette at a time. In other words, in this embodiment, the pore unit 20 is a circular hole.

[0047] For example, in the prior art, if 10 pores need to be opened on a cigarette, 10 mutually spaced pore units are formed on the cigarette by laser punching equipment, and one pore unit constitutes one pore, thereby forming 10 pores on the cigarette.

[0048] In the cigarette 100 provided in this embodiment, since at least one of the pores 10 is the composite pore 30, the total number of pores 10 required to be opened on the cigarette 100 can be less than 10 pores. For example, when one of the pores 10 provided on the cigarette 100 is the composite pore 30, and the composite pore 30 is composed of two pore units 20, the total number of pores 10 required to be opened on the cigarette 100 can be 9. Among the 9 pores 10, 1 is the composite pore 30, and the other 8 are ordinary pores 10, and the ordinary pores 10 are composed of one pore unit 20. When the composite pore 30 is composed of three or more pore units 20, the total number of pores 10 required to be opened on the cigarette 100 can be even less. Similarly, when the number of composite air holes 30 is increased, the total number of air holes 10 required on the cigarette 100 can also be reduced. For example, when all the air holes 10 provided on the cigarette 100 are composite air holes 30, the total number of air holes 10 required on the cigarette 100 can be further reduced. It should be noted that the number of air holes 10 and the number of composite air holes 30 provided are merely examples. The number and type of air holes 10 provided on the cigarette 100 can be selected accordingly based on actual needs. It is only necessary to provide the composite air holes 30 to better regulate the temperature and concentration of the smoke, better ensure the structural strength of the cigarette 100, and prevent the cigarette 100 from being easily broken by force.

[0049] Preferably, the cigarette 100 is provided with a plurality of air holes 10, and all of the air holes 10 provided on the cigarette 100 are composite air holes 30. This better ensures the cooling effect of the individual air holes 10 provided on the cigarette 100, and also reduces the number of air holes 10 required on the cigarette 100.

[0050] Preferably, along the punching direction of the composite air holes 30 on the cigarette 100, the composite air holes 30 located at the head and the composite air holes 30 located at the tail have the same shape and structure, and the composite air holes 30 between the composite air holes 30 located at the head and the composite air holes 30 at the tail have the same shape and structure. That is, along the direction of opening the multiple composite air holes 30 on the cigarette 100 (in this embodiment, they are opened sequentially along the circumference of the cigarette 100), when punching, the shape and structure of the first composite air hole 30 opened is the same as the shape and structure of the last composite air hole 30 opened. That is, in one embodiment, the number of composite air holes 30 opened is no less than 3, and the number of air hole units 20 contained in the two composite air holes 30 located at the head and tail is the same, and the overlapping portion between the air hole units 20 in each composite air hole 30 is the same, so that all the composite air holes 30 opened on the cigarette 100 have the same structure and shape. Furthermore, all other composite air holes 30 between the composite air holes 30 at the head and the composite air holes 30 at the tail have the same shape and structure. For example, when the cigarette 100 has four composite air holes 30, the two composite air holes 30 at the head and tail have the same shape and structure, while the other two composite air holes 30 have the same shape and structure. This can better ensure the balance of ventilation rates among the air holes 10. In other embodiments, when there are only two composite air holes 30, namely, only the composite air holes 30 at the head and the composite air holes 30 at the tail, the two composite air holes 30 can have the same shape and structure.

[0051] Preferably, all the air holes 10 are evenly spaced along the circumference of the cigarette 100. That is, the air holes 10 opened on the cigarette 100 are sequentially spaced along the circumference of the cigarette 100, and the spacing between two adjacent air holes 10 along the circumference of the cigarette 100 is equal, thereby better achieving the adjustment of the smoke temperature and concentration of the cigarette 100.

[0052] Preferably, the centers of all the pore units 20 are located on the same plane, and the plane is perpendicular to the axis of the cigarette 100. That is, in this embodiment, all the pores 10 are located at the same axial position on the cigarette 100, and the pore units 20 in the composite pores 30 are arranged along the circumference of the cigarette 100, so that the center of each pore unit 20 is located at the same axial position on the cigarette 100. That is to say, in this embodiment, all the pores 10 are distributed in an annular shape on the cigarette 100, which further ensures the effect of the pores 10 on the smoke temperature and concentration of the cigarette 100. It should be noted that in this embodiment, a group of pores 10 is provided on the cigarette 100, and all the pores 10 in the group of pores 10 are distributed at the same axial position on the cigarette 100. Of course, in other embodiments, the cigarette 100 may have more groups of air holes 10, such as two groups of air holes 10, with the air holes 10 in the same group 10 all located in the same axial position, and the two groups 10 spaced apart from each other along the axial direction of the cigarette 100. That is, in this embodiment, the cigarette 100 has a single row of perforations. In other embodiments, the cigarette 100 may have two or more rows of perforations.

[0053] Preferably, in one embodiment, the diameter of the cigarette 100 is 6-7 mm, and the number of the air holes 10 provided on the cigarette 100 is no more than 8, thereby better ensuring the structural strength of the cigarette 100.

[0054] Preferably, in one embodiment, the diameter of the cigarette 100 is 5-6 mm, and the number of the air holes 10 opened on the cigarette 100 is no more than 6, thereby better ensuring the structural strength of the cigarette 100.

[0055] Preferably, the cigarette 100 includes a tobacco segment 40 and a filter rod segment 50 connected to the tobacco segment 40, and the air hole 10 is opened in the filter rod segment 50. The tobacco segment 40 refers to the portion covered with a thin sheet or tobacco material. When the heated cigarette is used, the tobacco segment 40 is correspondingly inserted into the heating cavity of the heated tobacco device, and the filter rod segment 50 is the portion of the cigarette 100 that is not covered by the heating cavity after being inserted into the heated tobacco device. Specifically, the filter rod segment 50 includes but is not limited to the paper tube segment and the hollow acetate fiber segment therein. In this way, the air hole 10 opened on the cigarette 100 will not affect the normal smoking of the cigarette 100.

[0056] The heated cigarette 100 provided in this embodiment partially overlaps multiple pore units 20 to form strip-shaped channels (i.e., the composite pores 30). These multiple strip-shaped channels are then evenly distributed around the entire circumference of the cigarette 100 at regular intervals. This not only effectively utilizes the cigarette's circumference, preventing breakage, but also enhances the stability of the perforation process. By combining perforation parameters, the ventilation rate of the cigarette can be effectively adjusted while completing the perforation of the strip-shaped channels, thereby further regulating the temperature and concentration of the heated cigarette's smoke.

[0057] At the same time, this embodiment also provides a method for punching a heated cigarette 100, which includes the following steps:

[0058] S1. Providing a heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm;

[0059] S2. Determining the parameters of the air holes required to be opened on the cigarette;

[0060] S3. According to the pore parameters determined in step S2, the pores are opened in the cigarette along the radial direction of the cigarette, wherein the pores are composed of pore units, and at least one of the pores is a composite pore, and the composite pore is composed of at least two pore units partially overlapping.

[0061] Preferably, the pores are formed in step S3 by using a laser drilling device, and the pores formed in step S3 are all composite pores;

[0062] The pore parameters in step S2 include the number of pores required to be opened, the number of pore units included in the composite pores, the coordinated length coefficient, and the pulse time.

[0063] The number of the pores, the number of pore units contained in the composite pores, the coordinated length coefficient, and the pulse time can better ensure the ventilation rate of the cigarette and minimize the impact on the structural strength of the cigarette.

[0064] By adjusting the number of pores, the number of pore units that constitute the superimposed strip holes in each composite pore is set. The center of each superimposed pore unit is ensured to be located at the same axial position of the cigarette, and the number of superimposed pore units in a single composite pore does not exceed 16. By adjusting the length coefficient, the length of each composite pore is set. The larger the overlapping area of ​​the superimposed pore units, the closer the composite pore is to a rectangle, and the more stable the punching quality. For each two adjacent pore units, the single-sided intersection (overlapping part) of the outer circumference of the latter pore unit and the horizontal diameter should be located between the two intersections of the outer circumference of the former pore unit and the horizontal diameter. In the actual punching process, the degree of superposition of the connected pore units is controlled by adjusting the number of superimposed pore units and the length coefficient in a single composite pore. When the length coefficient is high, the number of superimposed units should be increased, and when the length coefficient is low, the number of superimposed units can be appropriately reduced. In other words, the length coefficient is a parameter that reflects the length of the composite pore. When other parameters are determined, a larger length coefficient indicates a longer composite pore, while a smaller length coefficient indicates a shorter composite pore. The pulse duration is the time required to punch a single pore unit. Adjusting this value ensures that the laser completely penetrates the surface of one side of the cigarette while ensuring that residual energy does not alter the morphology of the opposite cigarette's inner surface. This value can also be used to adjust the diameter of the individually stacked pore units within each composite pore.

[0065] Preferably, step S2 includes the following steps:

[0066] S21, determining the number of air holes required to be provided on the cigarette;

[0067] S22, determining the number n of pore units and the length system α% contained in the composite pores, wherein the numerical ratio of the number n of pore units to the length system α% is within the following range: 3.5<α / n<7.5;

[0068] S23. Determine the pulse time of a single pore unit.

[0069] In other words, in this embodiment, when determining the perforation parameters, the number of pores, the number of pore units in the composite pores, the coordinated length coefficient, and the pulse time are prioritized. Based on the weights of these parameters, a coarse adjustment followed by a fine adjustment is performed, thereby achieving better perforation of the cigarette. Assuming the cigarette is perforated, the impact of each perforation parameter on perforation is, in descending order, the number of pores, the coordinated length coefficient of the pore units in the composite pores, and the pulse time.

[0070] Among them, the number of air holes opened mainly realizes the coarse adjustment of the ventilation rate value, and the length coefficient cooperates with the number of air hole units contained in the composite air hole to further adjust the ventilation rate. At the same time, the ventilation stability of the cigarette is optimized according to the ratio of the two. The pulse time is used to ensure that the cigarette is pierced, and the adjustment of the superimposed circular aperture of the cigarette is achieved by adjusting this parameter, and finally the ventilation rate of the cigarette is accurately fine-tuned.

[0071] First, the number of air holes required should be determined. The ventilation of cigarettes is positively correlated with the number of air holes. Based on this relationship, the number of air holes should be adjusted accordingly to meet the fixed ventilation requirements. Furthermore, when the ventilation rate is required to be above 50%, for strip perforations, the number of air holes should not be less than 4.

[0072] Secondly, the number of pore units and the length coefficient contained in a single composite pore should be determined. The numerical ratio range of the length coefficient α% and the number of single-stage holes n is: 3.5<α / n<7.5. Only within this range can holes be punched on the cigarette. When the pulse time is constant, the number of pore units and the length coefficient contained in a single composite pore are positively correlated with the ventilation of the cigarette. The smaller α / n is, the larger the overlapping part of the superimposed circles is, and the higher the stability of the ventilation rate is. Based on the above relationship, the corresponding parameters of the fixed ventilation requirements should be adjusted. Furthermore, it is not advisable to set an excessively long length coefficient. The benchmark is that when holding the punched cigarette with four fingers, with the thumb vertical and the central axis of the cigarette parallel to the thumb, the outer side of the punched filter rod is pressed, and the cigarette cannot be broken.

[0073] Ultimately, the pulse time should be determined. The pulse time is positively correlated with the punch diameter within a certain range. Based on the minimum punch pulse time threshold, if the superimposed circle diameter needs to be increased, the pulse time should be appropriately increased while ensuring that the pulse time is not overloaded (punched cigarettes can be effectively punched out).

[0074] It is understandable that in order to ensure that the cigarette can be effectively punched during punching, preferably, step S11 is further included between step S1 and step S2, determining the minimum threshold of the pulse time.

[0075] The step S11 includes the following steps:

[0076] S111, punching holes in the cigarette using a laser punching device;

[0077] S112, cutting the punched cigarette;

[0078] S113. Measure the length and width of the hole.

[0079] Specifically, the cut cigarette is laid flat under a microscope with a measuring function, and the length and width of the composite pores (the diameter of a single superimposed circle) are measured from the front and back. The ratio of the length of the inner and outer composite pores should be no less than 80%; the ratio of the width of the inner and outer composite pores should be no less than 90%.

[0080] Through step S11, subsequent parameters can be selected more accurately to ensure that the single-side surface of the cigarette can be effectively penetrated by the laser during the punching process.

[0081] The method for punching heated cigarettes provided in this embodiment partially overlaps multiple pore units to form strip-shaped channels (i.e., the composite pores), and then the multiple strip-shaped channels are evenly distributed around the entire circumference of the cigarette at a certain distance, ensuring that channels with a large air intake area are punched within the circumference. While effectively improving the ventilation rate of the cigarette, the cigarette is not easily broken. This not only efficiently utilizes the circumference of the cigarette and prevents the cigarette from breaking. At the same time, the appearance of large-area strip-shaped channels is more conducive to improving the stability of cigarette punching. Specifically, the method of forming strip-shaped holes by superimposing small circles reduces the ventilation rate fluctuations caused by changes in the hole shape size when punching a single circle, thereby effectively improving the ventilation stability of the cigarette after punching. By combining the number of holes punched, the number of pore units contained in a single composite pore, the length coefficient, and the pulse time, while completing the punching of the cigarette strip-shaped channels, the hole shape of the pores opened on the cigarette can be changed, effectively adjusting the ventilation rate of the cigarette, thereby further regulating the smoke temperature and concentration of the heated cigarette. The method of forming strip holes by overlapping small circles appears as rectangular holes to the human eye, which also increases the novelty and aesthetics of the cigarette punching.

[0082] Specifically, in one embodiment, the number of the air holes 10 to be opened is set to 7, and each of the air holes 10 is the composite air hole 30. The number of the air hole units 20 included in the composite air hole 30 is 10, the length coefficient is 40%, and the pulse time is 92 us. The cigarette 100 with strip-shaped perforations is obtained. By testing 30 cigarettes 100, the ventilation rate values ​​are shown in Table 1.

[0083] Table 1

[0084] Specifically, in one embodiment, the number of the air holes 10 to be opened is set to 6, and each of the air holes 10 is the composite air hole 30. The number of the air hole units 20 contained in the composite air hole 30 is 6, the length coefficient is 30%, and the pulse time is 97 us. The cigarette 100 with strip-shaped perforations is obtained. By testing 30 cigarettes 100, the ventilation rate values ​​are shown in Table 2.

[0085] Table 2

[0086] The heated cigarette 100 and the heated cigarette punching method provided in this embodiment can better and more stably obtain the required ventilation rate, thereby reducing errors in the production process.

[0087] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm, characterized in that: The cigarette is provided with an air hole, and the air hole penetrates the cigarette in the radial direction of the cigarette; The pores are composed of pore units, and at least one of the pores is a composite pore, which is formed by at least two pore units partially overlapping.

2. The heated cigarette according to claim 1, characterized in that: The cigarette is provided with a plurality of air holes, and all of the air holes provided on the cigarette are composite air holes.

3. The heated cigarette according to claim 2, characterized in that: Along the punching direction of the composite air holes on the cigarette, the composite air holes at the head and the composite air holes at the tail have the same shape and structure, and the composite air holes between the composite air holes at the head and the composite air holes at the tail have the same shape and structure.

4. The heated cigarette according to any one of claims 1 to 3, characterized in that: All the air holes are distributed at equal intervals along the circumference of the cigarette.

5. The heated cigarette according to claim 4, characterized in that: The centers of all the air hole units are located on the same plane, and the plane is perpendicular to the axis of the cigarette support.

6. The heated cigarette according to any one of claims 1, 2, 3, and 5, characterized in that: The diameter of the cigarette is 6-7 mm, and the number of the air holes provided on the cigarette is no more than 8; Alternatively, the diameter of the cigarette is 5-6 mm, and the number of the air holes provided on the cigarette is no more than 6.

7. The heated cigarette according to claim 1, characterized in that: The cigarette comprises a tobacco segment and a filter rod segment connected to the tobacco segment, and the air holes are opened in the filter rod segment.

8. A method for punching holes in heated cigarettes, characterized in that: The steps include: S1. Providing a heated cigarette, wherein the diameter of the cigarette is between 5 and 7 mm; S2. Determining the parameters of the air holes required to be opened on the cigarette; S3. According to the pore parameters determined in step S2, the pores are opened in the cigarette along the radial direction of the cigarette, wherein the pores are composed of pore units, and at least one of the pores is a composite pore, and the composite pore is composed of at least two partially overlapping pore units.

9. The method for punching holes in heated cigarettes according to claim 8, characterized in that: In the step S3, the pores are formed by a laser drilling device, and the pores formed in the step S3 are all composite pores; The pore parameters in step S2 include the number of pores required to be opened, the number of pore units included in the composite pores, the coordinated length coefficient, and the pulse time.

10. The method for punching holes in heated cigarettes according to claim 9, characterized in that: The step S2 comprises the following steps: S21, determining the number of air holes required to be provided on the cigarette; S22, determining the number n of pore units and the length coefficient α% contained in the composite pores, wherein the numerical ratio of the number n of pore units to the length coefficient α% is within the following range: 3.5<α / n<7.5; S23. Determine the pulse time of a single pore unit.

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