Heat stick of heated tobacco product and punching method therefor

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

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on October 12, 2022, with application number 202211247715.8 and invention name " Cigarette of heated tobacco product and hole making method for cigarette of heated tobacco product", all 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 cigarette of heated tobacco product and hole making method for cigarette of heated tobacco product.Background

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

[0004] Heated tobacco products usually include heating set and cigarette. When smoking, tobacco segment of the cigarette is inserted into the heating chamber of the heating set, and the tobacco segment of the cigarette is heated by the heating element provided in the heating chamber. Although the temperature of the smoke generated by cigarette of heated tobacco products is lower than that of traditional cigarettes, the smoke has a higher water content and a shorter path, and the sensory temperature of the mainstream smoke reaching the oral cavity is higher than that of traditional cigarettes. Therefore, heated tobacco products need to have the function of cooling the smoke. At present, the smoke is cooled by air-holes on the cigarette of heated tobacco products, introducing cold air through the air-holes.

[0005] However, the cigarette of heated tobacco products in the prior art can be generally divided into cigarettes with a diameter greater than 7 mm and cigarettes with a diameter between 5-7 mm according to different diameter specifications. Cigarettes with a diameter between 5-7 mm have a smaller diameter, which makes the atomized smoke temperature of the cigarette higher and also makes the cooling pressure of the cigarette greater. The number of air-holes opened on the cigarette is generally much more than that of cigarettes with a diameter greater than 7 mm. However, too many openings and too small circumferences can easily cause 5-7 mm cigarettes to break under force during use, affecting the normal smoking of the cigarettes.Summary of the invention

[0006] In the prior art ,the 5-7 mm cigarettes of heated tobacco products due to the excessive number of openings and too small circumference can easily cause the cigarette to break under stress during use, affecting the smoking of the cigarette.

[0007] The present invention provides a cigarette of heated tobacco product, wherein at least one of the air-holes is a composite air-hole, which is formed by the partial overlap of at least two air-hole-unit, thereby increasing the hole volume of a single air-hole, allowing single air-hole to introduce more cold air, and increasing the cooling effect of single air-hole, so that reducing the number of air-holes required to be opened on the cigarette of heated tobacco product, and the influence of the air-holes on the strength of the cigarette of heated tobacco product is avoided as much as possible, so that the cigarette of heated tobacco product is not easily broken under stress during use, and the normal smoking of the cigarette of heated tobacco product is guaranteed.

[0008] A cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm, and the cigarette is provided with air-holes, and the air-holes penetrate the cigarette along the radial direction, the air-hole is composed of air-hole-unit, and at least one of the air-hole is a composite air-hole, the composite air-hole is formed by at least two partially overlapping air-hole-units.

[0009] Preferably, a plurality of the air-holes are provided on the cigarette, and all the air-holes provided on the cigarette are the composite air-holes.

[0010] Preferably, along the hole making direction of the composite air-hole on the cigarette, the shape and structure of start postion and end position of the composite air-hole are same, and the shape and structure between the start postion and the end position of the composite air-holeare same.

[0011] Preferably, all the air-holes are distributed at equal intervals along the circumference of the cigarette.

[0012] Preferably, the centers of all the air-hole-unit are located on a same plane, and the plane is perpendicular to the axis of the cigarette.

[0013] Preferably, the diameter of the cigarette is 6 to 7 mm, and the number of the air-holes provided on the cigarette is no more than 8;

[0014] Alternatively, the diameter of the cigarette is 5 to 6 mm, and the number of the air-holes provided on the cigarette is no more than 6.

[0015] Preferably, the cigarette comprises a tobacco segment and a filter rod segment connected to the tobacco segment, and the air-hole is opened in the filter rod segment. ahole making method for a cigarette of heated tobacco product, comprising the following steps: S1. providing a cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm; S2, determining parameters of the air-holes to be opened on the cigarette; S3, according to the parameters of air-holes determined in the S2, making the air-holes on the cigarette along the radial direction of the cigarette, wherein the air-hole is composed of air-hole-unit, and at least one of the air-holes is composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units.

[0016] Preferably, the air-holes are formed by laser hole making equipment in the S3, and the air-hole formed in the S3 are all composite air-hole.

[0017] The parameters in the S2 include the number of air-holes required to be opened, the number of air-hole-unit contained in the composite air-hole, the coordinated length coefficient, and the pulse time.

[0018] Preferably, the S2 comprises the following steps: S21, determining the number of air-holes required to be provided on the cigarette; S22, determining the number of air-hole-unit N and the length coefficient α% contained in the composite air-hole, and the number of air-hole-unit N and the length coefficient α% are within the following range: 3.5<α / n<7.5; S23, determining the pulse time of a single air-hole-unit..

[0019] Compared with the prior art, the cigarette of heated tobacco product provided by the present invention has air-holes 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-unit, and at least one of the air-holes is a composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units. Since at least one of the air-holes opened on the cigarette of heated tobacco product is a composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units, the air-hole volume of a single air-hole is increased, so that a single air-hole can introduce more cold air, and the cooling effect of a single air-hole is increased, so that the number of air-holes required to be opened on the cigarette of heated tobacco product is reduced, and the influence of the air-holes on the strength of the cigarette of heated tobacco product is avoided as much as possible, so that the cigarette of heated tobacco product is not easily broken by force during use, and the normal smoking of the cigarette of heated tobacco product is guaranteed.BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying any creative work. 3 FIG1 is a schematic structural diagram of a cigarette of heated tobacco product provided by an embodiment; FIG. 2 is a schematic diagram of the structure of a composite air-hole on a cigarette of heated tobacco product in FIG. 1 in an embodiment state; FIG3 is a schematic diagram of the structure of composite air-holes in another embodiment state in the cigarette of heated tobacco product shown in FIG1 ; FIG. 4 is a schematic diagram of the structure of the composite air-holes in another embodiment state in the cigarette of heated tobacco product shown in FIG. 1 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that when a component is referred to as being "fixed on", "installed 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.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0025] Please note that the structures, proportions, sizes, etc. shown in the drawings of this specification are only for the purpose of illustration. 4 The contents disclosed in the specification are intended for people familiar with the technology to understand and read, and are not intended to limit the conditions under which the present application can be implemented. Therefore, they have no substantial technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0026] The present invention provides a cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm, and the cigarette is provided with air-holes, and the air-holes penetrate the cigarette in the radial direction of the cigarette; wherein the air-holes are composed of air-hole-unit, and at least one of the air-holes is a composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units. Since at least one of the air-holes opened on the cigarette of heated tobacco product is a composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units, the volume of single air-hole is increased, so that single air-hole can introduce more cold air, and the cooling effect of a single air-hole is increased, so that the number of air-holes required to be opened on the cigarette of heated tobacco product is reduced, and the influence of the air-holes on the strength of the cigarette of heated tobacco product is avoided as much as possible, so that the cigarette of heated tobacco product is not easily broken by force during use, and the smoking of the cigarette of heated tobacco product is guaranteed.

[0027] Please refer to Figure 1. This embodiment provides a cigarette of heated tobacco product stick 100, wherein the diameter of the cigarette stick 100 is between 5 and 7 mm.

[0028] The cigarette 100 is provided with air-holes 10, and the air-holes 10 penetrate the cigarette 100 in the radial direction of the cigarette 100. The air-holes 10 are composed of air-hole-unit 20, and at least one of the air-holes 10 is a composite air-hole 30, and the composite air-hole 30 is composed of at least two air-hole-unit 20 partially overlapping. Partial overlap means that the two air-hole-unit 20 are interconnected, and the two air-hole-unit 20 do not completely overlap. As a result, the volume of the composite air-hole 30 is larger than that of a single air-hole-unit 20, and the space occupied by the composite air-hole 30 in the cigarette 100 is less than that of two separate air-hole-unit 20.

[0029] That is to say, at least one of the air-holes 10 is provided on the cigarette 100, and at least one of the air-holes 10 is a composite air-hole 30. Since the composite air-hole 30 is composed of at least two air-hole-unit 20, the number of air-holes 10 required to be provided on the cigarette 100 can be reduced, so that the influence of the air-holes 10 on the structural strength of the cigarette 100 can be avoided as much as possible while ensuring the cooling effect, so that the cigarette 100 is not easily broken by force during use, and the normal smoking of the cigarette 100 is better guaranteed. 5

[0030] It is understandable that the size of the overlapping area between the two air-hole-unit 20 in the composite air-hole 30 will affect the ventilation effect of the composite air-hole 30. As shown in FIG. 2, when the overlapping area between the two air-hole-unit 20 is small, the ventilation area of the composite air-hole 30 is relatively large. As shown in FIG. 3, when the overlapping area between the two air-hole-unit 20 is large, the ventilation area of the composite air-hole 30 is relatively small. Moreover, as shown in FIG. 4, the number of the air-hole-unit 20 included in the composite air-hole 30 can also affect the ventilation area of the composite air-hole 30. Therefore, according to the actual required ventilation rate, the composite air-hole 30 can be appropriately adjusted, such as adjusting the size of the overlapping area between each air-hole-unit 20, the number of air-hole-unit 20, and the like.

[0031] It is understandable that in the field of heated tobacco products, although the temperature of the smoke produced by cigarette of heated tobacco products is lower than that of traditional cigarettes, the smoke has a higher water content and a shorter path, and the sensory temperature of the mainstream smoke reaching the oral cavity is higher than that of traditional cigarettes. Therefore, cigarette of heated tobacco products need to have the function of cooling the smoke. At present, the smoke is cooled by opening air-holes on the cigarette of heated tobacco products, and then introducing cold air through the air-holes. According to the different diameter specifications, cigarette of heated tobacco products 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 prior art generally adopts an online hole making 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 circumference can easily cause the cigarette to break under force during use.

[0032] At the same time, the applicant's research found that since the smoke of cigarettes with a diameter between 5-7mm mostly uses peripheral heating (inner core), the smoke temperature at the same axial position in the filter rod is high outside and low inside. The introduction of perforations makes it easier for gaseous moisture and glycerin to mix with the high temperature difference of external cold air, promoting nucleation atomization. Therefore, perforating within a certain interval on the filter rod also has the effect of increasing the smoke concentration.

[0033] In the cigarette 100 provided in this embodiment, the composite air-hole 30 is provided on the cigarette 100, so that the channel volume of single air-hole can be increased, so that a single air-hole can introduce more cold air, so that the smoke temperature and concentration can be better adjusted. In this way, the total number of the air-holes 10 required to be opened on the cigarette 100 is reduced, and the influence of the opened air-holes 10 on the structural strength of the cigarette 100 is avoided as much as possible, so that the cigarette 100 is not easily damaged during use, not easy to break under force, which ensures the using of the cigarette 100.

[0034] It should be noted that in the prior art, laser hole making equipment is used to punch holes in cigarettes, and laser hole making equipment can only form one air-hole-unit on a cigarette at a pulse. Specifically, with the current cigarette hole making process, only a small round hole can be formed on a cigarette at a time. That is, in this embodiment, the air-hole-unit 20 is a round hole.

[0035] For example, in the prior art, if 10 air-holes need to be opened on a cigarette, 10 mutually spaced air-hole-unit are formed on the cigarette by laser hole making equipment, and one air-hole-unit constitutes one air-hole, thereby forming 10 air-holes on the cigarette.

[0036] In the cigarette 100 provided in the present embodiment, since at least one of the air-holes 10 is the composite air-hole 30, the total number of air-holes 10 required to be opened in the cigarette 100 may be less than 10 air-holes. For example, when one of the air-holes 10 provided on the cigarette 100 is the composite air-hole 30, and the composite air-hole 30 is composed of two air-hole-unit 20, the total number of air-holes 10 required to be opened in the cigarette 100 may be 9. Among the 9 air-holes 10, 1 is the composite air-hole 30, and the other 8 are ordinary air-holes 10, and the ordinary air-holes 10 are composed of one air-hole-unit 20. When the composite air-hole 30 is composed of three or more air-hole-unit 20, the total number of air-holes 10 required to be opened in the cigarette 100 may be even less. Similarly, when the number of the composite air-holes 30 is increased, the total number of the air-holes 10 required to be opened on the cigarette 100 can also be reduced. For example, when all the air-holes 10 opened on the cigarette 100 are the composite air-holes 30, the total number of the air-holes 10 required to be opened on the cigarette 100 can be further reduced. It should be noted that the number of the air-holes 10 and the number of the composite air-holes 30 are only for example. The number of the air-holes 10 and the type of the air-holes 10 set on the cigarette 100 can be selected according to actual needs. It is only necessary to set the composite air-holes 30 so as to better adjust the temperature and concentration of the smoke, better ensure the structural strength of the cigarette 100, and make the cigarette 100 not easily broken by force.

[0037] Preferably, the cigarette 100 is provided with a plurality of air-holes 10, and all the air-holes 10 provided on the cigarette 100 are the composite air-holes 30. This better ensures the cooling effect of the single air-hole 10 provided on the cigarette 100, and also reduces the number of air-holes 10 required on the cigarette 100.

[0038] Preferably, along the hole making direction of the composite air-holes 30 on the cigarette 100, the shape and structure of start postion and end position of the composite air-holes 30 are same, and shape and structure between the start postion and end position of the the composite air-holes 30 are same. That is, along the opening direction of the multiple composite air-holes 30 on the cigarette 100 (in this embodiment, they are opened in sequence along the circumference of the cigarette 100), when making hole, the shape and structure of the first composite air-hole 30 made has the same as the shape and structure of the last composite air-hole 30 made. That is, in one embodiment, the number of composite air-holes 30 opened is not less than 3, and the number of air-hole-unit 20 contained in the two composite air-holes 30 located at the start position and end position are same, and the overlapped parts between the air-hole-unit 20 in each composite air-hole 30 are the same, so that all the composite air-holes 30 opened on the cigarette 100 have the same structural shape. Furthermore, all other composite air-holes 30 between the composite air-holes 30 at thestart position and the composite air-holes 30 at the end position have same shape and structure. For example, when the cigarette 100 is provided with four composite air-holes 30, the two composite air-holes 30 at the start position and end position are of the same shape and structure, and the other two composite air-holes 30 are of the same shape and structure, which can better ensure the balance of ventilation rates of each air-hole 10. In other embodiments, when there are only two composite air-holes 30, that is, only the composite air-holes 30 at thestart position and the composite air-holes 30 at the end position, the two composite air-holes 30 can have the same shape and structure.

[0039] 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 spaced in sequence along the circumference of the cigarette 100, and the distance between two adjacent air-holes 10 along the circumference of the cigarette 100 is equal, so as to better adjust the smoke temperature and concentration of the cigarette 100.

[0040] Preferably, the centers of all the air-hole-unit 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 air-holes 10 are located at the same axial position on the cigarette 100, and the air-hole-unit 20 in the composite air-holes 30 are arranged along the circumferential extension of the cigarette 100, so that the center of each of the air-hole-unit 20 is located at the same axial position on the cigarette 100. That is to say, in this embodiment, all the air-holes 10 are distributed in a ring shape on the cigarette 100, which further ensures the effect of the air-holes 10 on the smoke temperature and concentration of the cigarette 100. It should be noted that, in this embodiment, a group of air-holes 10 is provided on the cigarette 100, and all the air-holes 10 in the air-hole group 8 The air-holes 10 are distributed at the same axial position on the cigarette 100. Of course, in other embodiments, more groups of the air-holes 10 can be provided on the cigarette 100, such as two groups of the air-holes 10, the air-holes 10 in the same group of the air-holes 10 are all at the same axial position, and the two groups of the air-holes 10 are spaced apart from each other along the axial direction of the cigarette 100. That is, in this embodiment, the number of rows of holes on the cigarette 100 is a single row. In other embodiments, the number of rows of holes on the cigarette 100 can also be double rows or more.

[0041] 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.

[0042] Preferably, in one embodiment, the diameter of the cigarette 100 is 5-6 mm, and the number of the air-holes 10 provided on the cigarette 100 is no more than 6, thereby better ensuring the structural strength of the cigarette 100.

[0043] 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 made on the filter rod segment 50. The tobacco segment 40 refers to the part covering sheet or tobacco material. When using the cigarette of heated tobacco product, the tobacco segment 40 is correspondingly inserted into the heating cavity of the heated tobacco device, and the filter rod segment 50 is the part of the cigarette 100 that is not covered by the heating cavity after the cigarette 100 is 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. In this way, the air-hole 10 opened on the cigarette 100 will not affect the using of the cigarette 100.

[0044] The cigarette of heated tobacco product 100 provided in this embodiment partially overlaps a plurality of the air-hole-unit 20 to form a strip-shaped channel (i.e., the composite air-hole 30), and then the plurality of strip-shaped channels are evenly distributed at a certain distance around the entire circumference of the cigarette 100, which not only efficiently utilizes the circumference of the cigarette to prevent the cigarette from breaking, but also the appearance of large-area strip-shaped channels is more conducive to improving the stability of hole making. By combining hole making parameters, the ventilation rate of the cigarette can be effectively adjusted while completing the hole making of the cigarette strip-shaped channels, thereby further adjusting the smoke temperature and concentration of the heated tobacco product.

[0045] At the same time, this embodiment also provides a hole making method for cigarette of heated tobacco product 100, which comprises the following steps: S1. provide a cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm; S2, determining parameters of the air-hole parameters required to be opened on the cigarette; S3. according to the air-hole parameters determined in the S2, making the air-holes on the cigarette along the radial direction of the cigarette, wherein the air-hole is composed of air-hole-unit, and at least one of the air-holes is composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units.

[0046] Preferably, the air-holes are formed by laser hole making equipment in the S3, and the air-hole formed in the S3 are all composite air-hole;

[0047] The parameters in the S2 include the number of air-holes required to be opened, the number of air-hole-unit contained in the composite air-hole, the coordinated length coefficient, and the pulse time.

[0048] The number of the air-holes, the number of air-hole-unit contained in one of the composite air-holes, the coordinated length coefficient, and the pulse time can better ensure the ventilation rate of the cigarette and reduce the impact on the structural strength of the cigarette as much as possible.

[0049] By adjusting the number of air-holes, the number of air-hole-unit constituting composite air-holes in each composite air-hole is set. The center of each overlapping air-hole-unit is ensured to be located at the same axial position of the cigarette, and the number of overlapping air-hole-unit in a single composite air-hole does not exceed 16; by adjusting the length coefficient, the length of each composite air-hole is set. The larger the overlapping area of the overlapping air-hole-unit, the closer the composite air-hole is to a rectangle, and the more stable the hole making quality. For each adjacent two air-hole-unit, the single-sided intersection point (overlapping part) of the outer circumference of the latter air-hole-unit and the horizontal diameter should be located between the two intersection points of the outer circumference of the former air-hole-unit and the horizontal diameter. In the actual hole making process, the degree of superposition of the connected air-hole-unit is controlled by adjusting the number of overlapping air-hole-unit and the length coefficient in a single composite air-hole. When the length coefficient is high, the number of overlapping units should be increased, and when the length coefficient is low, the number of overlapping units can be appropriately reduced. In other words, the length coefficient is a parameter that reflects the length of the composite air-hole. When other parameters are determined, the larger the length coefficient is, the longer the composite air-hole is, and the smaller the length coefficient is, the shorter the composite air-hole is. The pulse time is the time required to punch a single air-hole-unit. By adjusting this value, it is ensured that the laser completely punches through the surface of one side of the cigarette and the remaining energy does not change the morphology of the inner surface of the opposite side of the cigarette. On this basis, it is further used to adjust the diameter of the single overlapping air-hole-unit on each composite air-hole.

[0050] Preferably, S2 comprises the following steps: S21, determining the number of air-holes required to be provided on the cigarette; S22, determining the number of air-hole-unit N and the length coefficient α% contained in the composite air-hole, and the number of air-hole-unit N and the length coefficient α% are within the following range: 3.5<α / n<7.5; S23, determining the pulse time of a single air-hole-unit.

[0051] That is to say, in this embodiment, when determining the hole making parameters, the number of opened air-holes, the number of air-hole-unit in the composite air-holes, the coordinated length coefficient, and the pulse time are used as the priority to determine the parameters. According to the weight of the above parameters, the method of first rough adjustment and then fine adjustment is gradually carried out, so as to better achieve the hole making of the cigarette. On the premise that the cigarette is penetrated, the influence of each hole making parameter is the number of punched holes, the coordinated length coefficient of the air-hole-unit in the composite air-holes, and the pulse time.

[0052] Among them, the number of air-holes mainly making the coarse adjustment of the ventilation rate value, and the length coefficient cooperates with the number of air-hole-unit 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, and the pulse time is used to ensure that the cigarette is pierced, and the adjustment of the overlapping circular aperture of the cigarette is achieved by adjusting this parameter, and finally the ventilation rate of the cigarette is accurately fine-tuned.

[0053] 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-shaped air-hole, the number of air-holes should not be less than 4.

[0054] Secondly, the number of air-hole-unit and the length coefficient contained in a single composite air-hole 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 air-hole-unit and the length coefficient contained in a single composite air-hole are positively correlated with the ventilation of the cigarette. The smaller α / n is, the larger the overlap of the overlapping circles is, and the higher the stability of the ventilation rate is. The corresponding parameter adjustment should be made for the fixed required ventilation degree based on the above relationship. Furthermore, it is not advisable to set an excessively long length coefficient. The benchmark is to hold the punched cigarette with four fingers, with the thumb vertical and the central axis of the cigarette parallel to the thumb, and press the outside of the punched filter rod, so that the cigarette cannot be broken.

[0055] Ultimately, the pulse time should be determined. The pulse time is positively correlated with the perforation diameter within a certain range. Based on the minimum perforation pulse time threshold, if the overlapping circle diameter needs to be increased, the pulse time should be appropriately increased while ensuring that the pulse time is not overloaded (perforated cigarettes can be effectively penetrated).

[0056] It is understandable that in order to ensure that the cigarette can be effectively pierced during hole making. The S11 is further included between the S1 and the S2, determining the lowest threshold of the pulse time.

[0057] The S11 comprises the following steps: S111, making holes on the cigarette by using a laser hole making device; S112, cutting the holed cigarette; S113. measure the length and width of the hole.

[0058] Specifically, lay the cut cigarette flat under a microscope with a measuring function, and measure the length and width of the composite air-holes (the diameter of a single overlapping circle) from the front and back. The ratio of the length of the inner and outer composite air-holes should be no less than 80%; the ratio of the width of the inner and outer composite air-holes should be no less than 90%.

[0059] Through the 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 hole making process.

[0060] In the method for hole making holes in cigarette of heated tobacco products provided in this embodiment, a plurality of the air-hole-unit partially overlap to form a strip channel (i.e., the composite air-hole), and then the plurality of strip channels are evenly distributed at a certain distance around the entire circumference of the cigarette, so that a channel with a larger air intake area can be made within the circumference, and the cigarette is not easily broken while effectively improving the ventilation rate of the cigarette. The circumference of the cigarette is not only efficiently utilized to prevent the cigarette from breaking. At the same time, the appearance of large-area strip channels is more conducive to improving the stability of cigarette hole making. Specifically, the method of forming strip holes by superimposing small circles weakens the ventilation rate fluctuation caused by the change in hole size when hole making a single circle, thereby effectively improving the ventilation stability of the cigarette after hole making. By combining the number of holes, the number of air-hole-unit contained in a single composite air-hole, the length coefficient, and the pulse time, the hole type of the air-holes opened on the cigarette can be changed while completing the hole making of the cigarette strip channel, and the ventilation rate of the cigarette can be effectively adjusted, thereby further regulating the smoke temperature and concentration of the cigarette of heated tobacco product. The method of forming strip holes by overlapping small circles appears as rectangular holes to the human eye, which increases the novelty and aesthetics of the cigarette holes.

[0061] 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-unit 20 included in the composite air-hole 30 is 10, the length coefficient is 40%, the pulse time is 92us, and the cigarette 100 with strip-shaped perforations is obtained. By testing 30 cigarettes 100, the ventilation rate values are shown in Table 1. Table 1No.Ventilation rate (%)162.6263.3363.6464.6565.0665.3765.9866.2966.81067.51168.01268.51368.81469.81569.91670.41770.61870.71970.82070.92171.12271.52371.72472.02572.02672.72772.92873.92975.63077.5average 69.3 standard deviation 3.35

[0062] 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-unit 20 included in the composite air-hole 30 is 6, the length coefficient is 30%, the pulse time is 97µs, and the cigarette 100 with strip-shaped perforations is obtained. By testing 30 cigarettes 100, the ventilation rate values are shown in Table 2. Table 2No.Ventilation rate (%)140.3240.9341.7442.3543.2643.4743.5843.8944.11044.91145.41246.31346.51446.51546.91647.21747.61848.61949.62050.12150.42251.12351.62452.22553.32653.52754.02854.12956.43058.6average47.9standard deviation4.37

[0063] The cigarette of heated tobacco product 100 and the hole making method for cigarette of heated tobacco product provided in this embodiment can obtain the required ventilation rate better and more stably, and reduce the error in the production process.

[0064] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm, and the cigarette is provided with air-hole, the air-hole penetrates the cigarette in the radial direction; the air-hole is composed of air-hole-unit, and at least one of the air-hole is a composite air-hole, the composite air-hole is formed by at least two partially overlapping air-hole-units.

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

3. The cigarette of heated tobacco product according to claim 2 is characterized in that, along the hole making direction of the composite air-hole on the cigarette, the shape and structure of start postion and end position of the composite air-hole are same, and the shape and structure between the start postion and the end position of the composite air-holeare same.

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

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

7. The cigarette of heated tobacco product according to claim 1 is characterized in that the cigarette comprises a tobacco segment and a filter rod segment connected to the tobacco segment, and the air-hole is opened in the filter rod segment.

8. A hole making method for a cigarette of heated tobacco product, <b>characterized in that the method includes the following steps: S1. providing the cigarette of heated tobacco product, wherein the diameter of the cigarette is between 5 and 7 mm; S2, determining parameters of air-holes to be opened on the cigarette; S3. according to the parameters of the air-holes determined in the S2, making the air-holes on the cigarette along the radial direction of the cigarette, wherein the air-holes is composed of air-hole-units, and at least one of the air-holes is composite air-hole, and the composite air-hole is formed by at least two partially overlapping air-hole-units.

9. The method for hole making holes in cigarette of heated tobacco products according to claim 8, characterized in that the air-holes are formed by laser hole making equipment in the S3, and the air-hole formed in the S3 are all composite air-hole; the parameters in the S2 include the number of air-holes required to be opened, the number of air-hole-unit contained in the composite air-hole, the coordinated length coefficient, and the pulse time.

10. The hole making method for a cigarette of heated tobacco product, according to claim 9, characterized in that the S2 comprises the following steps: S21, determining the number of air-holes required to be provided on the cigarette; S22, determining the number of air-hole-units N in the composite air-hole and the length coefficient α% , and the number of air-hole-unit N and the length coefficient α% are within the following range: 3.5<α / n<7.5; S23, determining the pulse time for a single air-hole-unit.

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