Sealing unit of cigarette additive and heating cigarette

Abstract

The invention discloses a sealing unit of a cigarette additive and a heated cigarette, the sealing unit comprises a storage part and a slow-release perfumed part, and the storage part is arranged on the surface of the slow-release perfumed part; the storage part comprises a cigarette additive, a wrapping layer and a packaging layer; the cigarette additive is loaded in the wrapping layer, and an opening of the wrapping layer is sealed by the packaging layer; the slow-release perfumed part is connected to the surface of the packaging layer, the slow-release perfumed part is arranged according to a formula (1), and the packaging layer is made of a composite material formed by one or more of polylactic acid, polycaprolactone and polypropylene. The invention provides a novel perfuming mode, the storage part is arranged, so that various types of essence can be sealed for a long time under a general storage environment condition, when the heating cigarette is smoked, the packaging layer of the storage part can be heated and cracked under the action of smoke, the sealing state of the cigarette additive in the storage part is damaged, and the cigarette additive can be stored for a long time. And therefore, uniform release in the whole suction process is realized through the slow-release perfumed part.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heating cigarette flavoring, and particularly relates to a sealing unit of a tobacco additive and a heating cigarette. BACKGROUND

[0002] As a new type of tobacco product, the heating cigarette has developed rapidly in recent years. It adopts the mode of "heating without burning" to heat tobacco, but like traditional cigarettes, it will also produce visible smoke. The non-burning feature greatly reduces harmful substances in the smoke. However, when smoking a heating cigarette, an external heat source is needed to heat the tobacco substrate. As the smoking time prolongs, the state of the tobacco substrate is constantly changing, causing the composition of the generated smoke aerosol to also constantly change, especially for tobacco flavor components, making the flavor components of each puff inconsistent. Therefore, the heating cigarette needs to be flavored to solve this problem.

[0003] The current flavoring methods for heating cigarettes mainly include mixing flavoring agents with tobacco in the smoking section, built-in blasting beads, and adding flavoring threads. However, the flavoring method with built-in blasting beads requires manual squeezing to release the blasting beads before smoking, and the flavoring methods with mixed flavoring agents and added flavoring threads have poor sealing performance, which can easily cause flavor mixing and flavor distortion. Moreover, since the flavoring carriers are concentrated in the heating cigarette, the characteristic flavor is often rapidly released in the first few puffs, resulting in insufficient characteristic flavor in subsequent puffs and poor user experience. SUMMARY

[0004] The purpose of the present application is to provide a sealing unit of a tobacco additive and a heating cigarette, which can improve the sealing performance of the flavoring method and the uniformity of flavor release.

[0005] To solve the technical problem, the present application adopts the following technical solution:

[0006] A sealing unit of a tobacco additive, which comprises a storage part and a slow-release flavoring part. The storage part is arranged on the surface of the slow-release flavoring part. The storage part comprises a tobacco additive, a wrapping layer, and an encapsulation layer. The tobacco additive is loaded in the wrapping layer, and the opening of the wrapping layer is sealed by the encapsulation layer. The slow-release flavoring part is connected to the surface of the encapsulation layer, and the slow-release flavoring part is arranged according to the following formula (1):

[0007] S1>n x S2 (1)

[0008] S1 is the area of the slow-release fragrance-adding part, S2 is the opening area of the wrapping layer, n is 1.2-1.5, 1.5-2.0, 2.0-2.5, 2.5-3.0, 3.0-4.0, 4.0-5.0, 5.0-10.0 or 10.0-15.0; the packaging layer material is a composite material formed by one or more of polylactic acid, polycaprolactone and polypropylene, and the cigarette additive includes a cigarette flavor; when a user smokes the heated cigarette, the packaging layer is broken under the action of the smoke temperature, and the cigarette flavor can be released on the slow-release fragrance-adding part through the packaging layer.

[0009] Further, the opening shape of the wrapping layer is one or more of a square, a rectangle, a ladder shape, a polygon, a star, an oval and a cone.

[0010] Further, the slow-release fragrance-adding part has a microporous structure, the cigarette additive penetrates to the outside of the wrapping layer through the microporous structure, and is released into the user's oral cavity with the smoke.

[0011] Further, the slow-release fragrance-adding part has a mesh number of 6000-8000, 8000-10000, 10000-15000, 15000-20000 or 20000-24000.

[0012] Further, the storage part is provided at least in two.

[0013] Further, the cigarette additive further includes one or more of a smoking agent, a sugar material, a sweetener, a spice, a colorant, a preservative, a combustion-supporting agent and Chinese herbal medicine.

[0014] Further, the storage parts containing different cigarette additives in the sealing unit are independently arranged on the surface of the slow-release fragrance-adding part.

[0015] Further, the cigarette additive is in a liquid form.

[0016] Further, the cigarette flavor includes a flavor material in ethanol, propylene glycol, olive oil and / or capryl capryl glycerin as a solvent.

[0017] Further, the thickness of the packaging layer is 0.1-0.2mm, 0.2-0.3mm, 0.3-0.4mm or 0.4-0.5mm.

[0018] Further, the material of the wrapping layer is polylactic acid.

[0019] Further, the thickness of the wrapping layer is 40 microns-50 microns, 50 microns-60 microns, 60 microns-70 microns, 70 microns-80 microns or 80 microns-90 microns.

[0020] The present application further provides a heated cigarette, the heated cigarette comprising a smoking segment, a cooling segment and a filter segment, the cooling segment comprising a sealed unit of any of the smoking additives described above.

[0021] Further, the smoking segment comprises an aerosol-forming substrate for heating and atomising to generate smoke.

[0022] Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate can comprise both solid and liquid components.

[0023] Preferably, the aerosol-forming substrate comprises nicotine.

[0024] In some preferred embodiments, the aerosol-forming substrate comprises tobacco. For example, the aerosol-forming material can be formed from a sheet of homogenised tobacco.

[0025] Alternatively or additionally, the aerosol-forming substrate can comprise aerosol-forming material that does not contain tobacco.

[0026] For example, the aerosol-forming material can be a sheet comprising a nicotine salt and an aerosol former.

[0027] If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate can comprise one or more of a powder, a granule, a pellet, a shard, a striplet, a rodlet or a sheet material, containing one or more of a herbal plant leaf, a tobacco leaf, a tobacco rib, a flat expanded tobacco and a homogenised tobacco.

[0028] Alternatively, the solid aerosol-forming substrate can be provided on or embedded in a heat stable carrier.

[0029] Alternatively, the carrier can take the form of a powder, a granule, a pellet, a shard, a striplet, a rodlet or a sheet material.

[0030] Alternatively, the solid aerosol-forming substrate can be arranged on the surface of the carrier, for example in the form of a sheet material, a foam, a gel or a slurry.

[0031] Alternatively, the aerosol-forming substrate can be in the form of a plug.

[0032] Alternatively, the plug comprises aerosol-forming material defined by paper or other packaging material. In the case where the aerosol-forming substrate is in the form of a plug, the entire plug including any wrapping paper is considered to be the aerosol-forming substrate.

[0033] Preferably, the heated cigarette can have the appearance of a conventional cigarette, cigarette articles such as cigarettes and their gauge are typically named according to the length of the cigarette, as follows:

[0034] By "standard", it is generally meant a cigarette of a length in the range of 68 mm to 75 mm, for example of a length of about 68 mm to about 72 mm, by "short" or "mini", it is meant a cigarette of a length below 68 mm, by "over-standard", it is generally meant a cigarette of a length in the range of 75 mm to 91 mm, for example of a length of about 79 mm to about 88 mm, by "long" or "king-size", it is generally meant a cigarette of a length in the range of 91 mm to 105 mm, for example of a length of about 94 mm to about 101 mm, and by "super-long", it is generally meant a cigarette of a length in the range of about 110 mm to about 121 mm.

[0035] In addition, the cigarette articles are named according to the circumference of the cigarette rod, as follows:

[0036] By "standard", it is generally meant a cigarette of a circumference of about 23 mm to 25 mm, by "bold", it is meant a cigarette of a circumference above 25 mm, by "slim", it is meant a cigarette of a circumference of about 22 mm to 23 mm, by "slim long", it is meant a cigarette of a circumference of about 19 mm to 22 mm, by "super-slim", it is meant a cigarette of a circumference of about 16 mm to 19 mm, and by "micro-slim", it is meant a cigarette of a circumference below 16 mm. Thus, a cigarette of the over-standard and super-slim type has, for example, a length of about 83 mm and a circumference of about 17 mm. Cigarettes of the standard and over-standard type, i.e. of a length of 75 mm to 91 mm and of a circumference of 23 mm to 25 mm, are preferred by many customers.

[0037] Preferably, the cigarette articles of each gauge can also be manufactured with filters of different lengths. Generally, short filters are used for cigarette articles of gauges that are short in length and circumference. Generally, the filter length ranges from 15 mm, used with cigarette articles of the "short" and "standard" gauges, to 30 mm, used with cigarette articles of the "super-long" and "super-slim" gauges. The length of the tipping paper in the length direction of the cigarette article with filter is, for example, 3 mm to 10 mm longer than the filter.

[0038] Preferably, the heated cigarette comprises an aerosol-forming substrate, a support element, an aerosol-cooling element, and a filter rod segment. The support element and the aerosol-cooling element form a cooling segment, and the aerosol-forming substrate forms a smoking segment.

[0039] Preferably, the aerosol-cooling element can be located downstream of the aerosol-forming substrate, for example, the aerosol-cooling element can be located immediately downstream of, and can abut, the support element. The aerosol-cooling element can also be located between the support element and a filter rod segment, which is located at the most downstream end of the aerosol-generating article.

[0040] Preferably, the aerosol-cooling element can have a total surface area of between about 300 square millimetres per millimetre of length and about 1000 square millimetres per millimetre of length. In preferred embodiments, the aerosol-cooling element has a total surface area of about 500 square millimetres per millimetre of length.

[0041] Preferably, the aerosol-cooling element can be alternatively referred to as a heat exchanger.

[0042] Preferably, the aerosol-cooling element has a low draw resistance. That is, preferably, the aerosol-cooling element provides a low resistance to air passing through the aerosol-generating article. Preferably, the aerosol-cooling element does not substantially affect the draw resistance of the aerosol-generating article.

[0043] Preferably, the aerosol-cooling element can comprise a plurality of longitudinally extending channels. The plurality of longitudinally extending channels can be defined by a sheet material that has undergone one or more of crimping, pleating, gathering and folding to form the channels. The plurality of longitudinally extending channels can be defined by a single sheet material that has undergone one or more of crimping, pleating, gathering and folding to form the plurality of channels. Alternatively, the plurality of longitudinally extending channels can be defined by a plurality of sheet materials that have undergone one or more of crimping, pleating, gathering and folding to form the plurality of channels.

[0044] In some embodiments, the aerosol-cooling element can comprise a gathered sheet of material selected from the group consisting of: a metal foil, a polymeric material and a substantially non-porous paper or paperboard. In some embodiments, the aerosol-cooling element can comprise a gathered sheet of material selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA) and aluminium foil. In preferred embodiments, the aerosol-cooling element comprises a gathered sheet of biodegradable material. For example, a gathered sheet of non-porous paper or a gathered sheet of biodegradable polymeric material such as polylactic acid.

[0045] Preferably, the aerosol-forming substrate, the support element, the aerosol-cooling element and the plug of rod segments are substantially cylindrical and have substantially equivalent outer diameters. For example, have an outer diameter of at least 5 mm. Preferably, have an outer diameter of between about 5 mm and about 12 mm, for example between about 5 mm and about 10 mm or between about 6 mm and about 8 mm. In preferred embodiments, have an outer diameter of 7.2 mm + / - 10%.

[0046] Preferably, the aerosol-forming substrate can have a length of between about 5 mm and about 15 mm, for example between about 8 mm and about 12 mm. In preferred embodiments, the aerosol-forming substrate has a length of about 12 mm.

[0047] Preferably, the support element may comprise a hollow tubular element. The support element may be formed from any suitable material or combination of materials.

[0048] More preferably, the support element may be formed of one or more materials selected from the group consisting of: cellulose acetate; paperboard; crimped paper, such as crimped heat-resistant paper or crimped parchment; and polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the support element comprises a medium cellulose acetate tube.

[0049] Preferably, the filter rod segment can have a length between approximately 5 mm and approximately 20 mm. In a preferred embodiment, the filter rod segment has a length of approximately 14 mm. The filter rod segment can have a length between approximately 5 mm and approximately 14 mm. In a preferred embodiment, the filter rod segment has a length of approximately 7 mm.

[0050] This invention provides a novel flavoring method. By incorporating a storage compartment, various flavorings can be sealed for extended periods under normal storage conditions, preventing cross-contamination between the flavorings and other ingredients in heated cigarettes before smoking, thus avoiding flavor distortion. Furthermore, when the user begins smoking the heated cigarette, the sealing layer of the storage compartment is broken by the heat from the smoke, disrupting the seal of the tobacco additives within. These additives are then rapidly released onto the slow-release flavoring section, achieving a uniform release throughout the smoking process. Attached Figure Description

[0051] The above description of the present invention and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solutions.

[0052] Figure 1 This is a schematic diagram of the structure of the slow-release fragrance-adding part in the sealing unit of the present invention;

[0053] Figure 2 This is a schematic diagram of the slow-release fragrance-adding part in the sealing unit of the present invention from another angle.

[0054] Figure 3 This is a schematic diagram of the stepped opening shape of the wrapping layer in this invention;

[0055] Figure 4 This is a schematic diagram of the conical opening shape of the wrapping layer in this invention;

[0056] Figure 5 This is a schematic diagram of the polygonal opening shape of the wrapping layer in this invention;

[0057] Figure 6Fig. 1 is a schematic view of a polygonal and star-shaped combined opening shape of a wrapping layer in the present application;

[0058] Figure 7 Fig. 2 is a schematic view of a sealed unit structure in the present application;

[0059] Figure 8 Fig. 3 is a schematic view of a heated cigarette structure in the present application;

[0060] Figure 9 Fig. 4 is a schematic view of a sealed unit product in the present application.

[0061] In the drawings, the following reference numerals are used:

[0062] Sealed unit: 10

[0063] Packaging layer: 11

[0064] Wrapping layer: 12

[0065] Opening: 121

[0066] Tobacco flavor: 13

[0067] Slow-release flavoring part: 14

[0068] Filter rod segment: 20

[0069] Cooling segment: 30

[0070] Smoking segment: 40 DETAILED DESCRIPTION

[0071] The detailed features and advantages of the present application will be described in detail in the following specific embodiments, and the contents are sufficient to enable any person skilled in the art to understand the technical content of the present application and to implement it, and according to the description, claims and drawings disclosed in the specification, those skilled in the art can easily understand the related purposes and advantages of the present application.

[0072] It should be noted that in this specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0073] In order to make the purposes, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below in combination with the drawings. The experimental methods described in the embodiments of the present application are all conventional methods, and the materials, reagents, etc. used in the following examples are all commercially available unless otherwise specified.

[0074] As Figures 1-9As shown, the present invention provides a sealing unit 10 for a tobacco additive. The sealing unit 10 includes a storage section and a slow-release flavoring section 14. The storage section is disposed on the surface of the slow-release flavoring section 14. There is at least one storage section, which includes a tobacco additive, a wrapping layer 12, and a sealing layer 11. The tobacco additive is loaded in the wrapping layer 12, and the opening 121 of the wrapping layer 12 is sealed by the sealing layer 11. The slow-release flavoring section 14 is connected to the surface of the sealing layer 11, and the slow-release flavoring section 14 is configured according to the following formula (1):

[0075] S1>n×S2 (1)

[0076] Wherein, S1 is the area of ​​the slow-release aroma-enhancing part 14, S2 is the area of ​​the opening 121 of the encapsulation layer 12, and n takes values ​​of 1.2–1.5, 1.5–2.0, 2.0–2.5, 2.5–3.0, 3.0–4.0, 4.0–5.0, 5.0–10.0, or 10.0–15.0. Within this range, the user can clearly perceive the characteristic aroma in the second puff of heated cigarette smoke, and the characteristic aroma is released evenly, so that the user can still perceive the characteristic aroma even in the later stages of smoking the heated cigarette. The encapsulation layer 11 is a composite material formed from one or more of polylactic acid (PLA), polycaprolactone (PCL), and polypropylene (PP).

[0077] Specifically, the tobacco additives include tobacco flavoring 13. When a user smokes a heated cigarette, the encapsulation layer 11 is heated and delaminated by the temperature of the smoke, and the tobacco flavoring 13 can be released from the encapsulation layer 11 through the wrapping layer 12 and onto the slow-release flavoring part 14.

[0078] Specifically, such as Figures 3-6 As shown, the opening 121 of the wrapping layer 12 has a shape that is one or more of the following: square, rectangular, stepped, polygonal, star-shaped, elliptical, and conical. Since the area of ​​the opening 121 of the wrapping layer 12 is smaller than the area of ​​the slow-release flavoring section 14, when the heated cigarette is inhaled, the smoke can penetrate the high-permeability paper and contact the sealing layer 11, causing the sealing layer 11 to gradually melt. In this way, the tobacco additives can be released from the opening 121 onto the slow-release flavoring section 14, and can then be formulated according to the needs of different heated cigarette additives. For example, the opening 121 can be set as... Figures 3-4 The stepped and conical shapes shown indicate that when the aroma of the heated cigarette is sufficient in the early stages, the demand for tobacco flavoring 13 is not high. The smaller portion (e.g., the pointed part of the conical shape) is located near the smoke-generating section 40, where it comes into contact with the smoke first, and the smoke temperature is also relatively high. Therefore, the sealing layer 11 in this part is the first to be heated and cracked. When smoking the heated cigarette in the later stages, the demand for tobacco flavoring 13 needs to be increased. At this time, the larger portion of the opening 121 has also cracked under the continuous action of the smoke temperature, and a large amount of tobacco flavoring 13 is released onto the slow-release flavoring section 14.

[0079] Specifically, as shown in Figures 5-6 the storage part is provided at least two, which can be used to load different tobacco additives to meet the needs of different heated cigarettes, and the shape and position of the opening 121 can be controlled to regulate the release order and speed of the tobacco additives. The tobacco additives include one or more of the smoke generating agent, sugar, sweetener, spice, colorant, preservative, combustion improver and Chinese herbal medicine. The storage part containing different tobacco additives in the sealing unit 10 is independently arranged on the surface of the slow-release flavoring part 14.

[0080] More specifically, the material of the wrapping layer 12 is polylactic acid. Under the action of the smoke, the material of the packaging layer 11 and the wrapping layer 12 can gradually melt until finally forming a gas-like form disappears.

[0081] Specifically, the thickness of the packaging layer 11 and the wrapping layer 12 can achieve rapid release during the smoking of the heated cigarette. The thickness of the packaging layer 11 is 0.1-0.2mm, 0.2-0.3mm, 0.3-0.4mm or 0.4-0.5mm. More specifically, the thickness of the wrapping layer 12 is 40-50 microns, 50-60 microns, 60-70 microns, 70-80 microns or 80-90 microns. The thickness of the wrapping layer 12 is less than the thickness of the packaging layer 11. During the smoking of the heated cigarette, the wrapping layer 12 can melt first. Since the tobacco additives do not corrode the packaging layer 11, they can stay on the packaging layer 11. A small part of the tobacco additives can reach the user's mouth with the second smoke of the heated cigarette, and most of the tobacco additives can be adsorbed on the slow-release flavoring part 14 after the packaging layer 11 is melted and broken, so that the uniformity of the characteristic flavor release during the whole smoking process is realized through the slow-release flavoring part 14.

[0082] Specifically, the slow-release flavoring part 14 has a microporous structure, and the tobacco additives penetrate to the outside of the wrapping layer 12 through the microporous structure and are released into the user's mouth with the smoke. Preferably, the slow-release flavoring part 14 is a high-transparency paper. More specifically, the slow-release flavoring part 14 has a mesh number of 6000-8000, 8000-10000, 10000-15000, 15000-20000 or 20000-24000.

[0083] Specifically, the tobacco additive is in a liquid form.

[0084] Specifically, the tobacco essence 13 includes essence materials with ethanol, propylene glycol, olive oil and / or capryl capryl glycerol as solvents.

[0085] The sealing unit 10 of the present application further realizes multiple functions such as increasing characteristic flavor or increasing smoke amount by setting a storage part containing tobacco additives, and can be built-in at any suitable position between the heating cigarette smoke generating section 40 and the filter rod section 20, preferably in the cooling section 30. During the placement time of the heating cigarette, the multifunctional sealing unit 10 maintains a good sealing state, and the flavor or atomizing agent is well sealed between the wrapping layer 12 and the packaging layer 11.

[0086] Working principle: from the start of smoking the heating cigarette, the smoke passes through the multifunctional sealing unit 10, the smoke can penetrate the slow-release flavoring part 14 and contact the packaging layer 11, under the action of the smoke temperature (80-100℃), the packaging layer 11 gradually melts until it disappears in the form of a gas, the sealing gradually releases, the flavor or atomizing agent gradually overflows and gradually adsorbs on the slow-release flavoring part 14, continue to smoke the cigarette, the flavor or atomizing agent further overflows and adsorbs on the high-transparency paper, the flavor or atomizing agent has good volatility, the characteristic flavor of the flavor can be clearly experienced, and the atomizing agent can significantly increase the atomization amount, the entire overflow and adsorption process starts from the start of smoking the heating cigarette and ends until the end of smoking, the smoking process is the multifunctional sealing unit 10 function implementation process.

[0087] To further illustrate the advantages of the present application, the present application carries out heating cigarette smoking experiment containing sealing unit 10 and explores the sealing property of the sealing unit.

[0088] 1. Heating cigarette smoking experiment

[0089] The sealing unit containing tobacco flavor of the present application is built-in in the hollow cooling section of the heating cigarette, as shown in Figures 8-9 The experimenter smokes the heating cigarette, and the heating cigarette smoking experiment and sensory evaluation are carried out according to the standard YC / T 138-1998. The smoke passes through the sealing unit, and the smoke temperature is measured to be between 80-110℃, starting from 2 puffs, the characteristic flavor of the tobacco flavor can be clearly absorbed, and the characteristic flavor of the smoke is evenly released during the entire smoking process. Therefore, the sealing unit of the present application can basically meet the design function, i.e. can volatilize the characteristic therein during smoking the heating cigarette, and the sealing unit containing tobacco flavor formed can meet the design requirements of the release of the tobacco flavor, and the slow-release flavoring part therein well realizes the uniformity of the flavor release, and the characteristic flavor in the later stage of smoking is improved.

[0090] 2. Sealing property experiment of the sealing unit

[0091] Different materials are loaded in the wrapping layer of the sealing unit containing tobacco flavor, and then sealed with the packaging layer, and the corrosion and surface tension are observed, and the experimental results are shown in Tables 1 and 2.

[0092] Table 1: Evaluation table of the influence of cigarette flavor solvent on the performance of the encapsulation layer

[0093] Flavour solvent for cigarettes PLA film EVA hot melt glue Dripping property (surface tension) Propylene glycol Not corrosive Not corrosive Good ODO (olive oil) Not corrosive Obvious corrosion Generally (not spread out)

[0094] Table 2: Evaluation table of the influence of flavor materials on the performance of the encapsulation layer and smoking in a heated cigarette

[0095] Flavour material PLA film EVA hot melt glue Dripping property (surface tension) Sucking taste Grape base Severe corrosion Corrosion Good Not obvious Honeydew melon base Corrosion Corrosion Spread out Generally

[0096] Table 3: Evaluation table of the influence of polycaprolactone on the performance of different cigarette flavor solvents and flavor materials

[0097]

[0098]

[0099] As can be seen from the comparison results of Table 1 and Table 2, when the wrapping layer is loaded with a cigarette flavor solvent, the corrosion prevention is better. When the wrapping layer is directly loaded with a common flavor material, the encapsulation layer material will be corroded, thereby the sealing property of the flavor release unit cannot be guaranteed, the flavor is easy to be mixed with other raw materials of the heated cigarette, the flavor is distorted, and it is difficult to achieve the release in the heated cigarette before the user smokes the second puff of smoke, and the overall smoking taste is poor. As can be seen from Table 3, the adaptability of polycaprolactone to various flavor ingredients is good.

[0100] The present application further explores the influence of common flavor materials mixed with solvents on the sealing effect of the encapsulation layer, observes the influence on the corrosion and surface tension, and further explores the influence of the sealing unit prepared therefrom on the smoking taste in the application of the heated cigarette.

[0101] The wrapping layer is tightly bonded with the PLA encapsulation layer material with EVA hot melt adhesive as the bonding agent to form a sealing unit, the influence of the cigarette flavor material in the wrapping layer on the encapsulation layer is observed, and the experimental results are shown in Table 4:

[0102] Table 4: Evaluation table of the influence of cigarette flavor materials on the performance of the encapsulation layer PLA material

[0103]

[0104] As can be seen from Table 4, the adaptability of the sealing unit prepared by bonding the PLA encapsulation layer material with EVA hot melt adhesive to cigarette flavor is poor, and the selection of different cigarette flavors will corrode the encapsulation layer or EVA hot melt adhesive, thereby damaging the sealing property of the sealing unit.

[0105] The wrapping layer is tightly connected with the PCL encapsulation layer material by ultrasonic welding or hot press welding process to form a sealing unit, the influence of the cigarette flavor material in the wrapping layer on the encapsulation layer is observed, and the experimental results are shown in Table 5.

[0106] Table 5: Evaluation table of the influence of cigarette flavor materials on the performance of the encapsulation layer PCL material

[0107]

[0108] As can be seen from Table 5, the PCL encapsulation layer material has good adaptability to various types of cigarette flavor materials in the sealed unit, has the advantage of corrosion prevention for various types of cigarette flavor materials, thus has wide adaptability to the selection of cigarette flavor materials, and further maintains at least good release of the characteristic flavor, in terms of smoking experience, realizes that the characteristic flavor can be felt when smoking the second puff of smoke.

[0109] The terms and expressions herein have been chosen to best describe the application, but no undue limitations are to be made on the basis of the terms and expressions. The use of these terms and expressions does not mean that any illustration and description (or part thereof) is excluded, and it should be recognized that various modifications can exist and should be included in the scope of the claims. Other modifications, changes and replacements can also exist. Accordingly, the claims should be considered to cover all these equivalents.

[0110] Similarly, it should be noted that although the present application has been described with reference to the current specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or replacements can be made without departing from the spirit of the present application, therefore, any changes, modifications of the above embodiments within the scope of the spirit of the present application will fall within the scope of the claims of the present application.

Claims

1. A sealing unit for a tobacco additive, characterized in that, The sealing unit includes a storage section and a slow-release fragrance section. The storage section is disposed on the surface of the slow-release fragrance-enhancing section; The storage section includes the tobacco additive, the wrapping layer, and the encapsulation layer; The tobacco additive is loaded inside the wrapping layer, and the opening of the wrapping layer is sealed by the encapsulation layer; The sustained-release fragrance attachment is connected to the surface of the encapsulation layer, and the sustained-release fragrance attachment is configured according to the following formula (1): S1>n×S2 (1) Wherein, S1 is the area of ​​the sustained-release fragrance portion, S2 is the opening area of ​​the encapsulation layer, and n takes the value of 1.2 to 1.5, 1.5 to 2.0, 2.0 to 2.5, 2.5 to 3.0, 3.0 to 4.0, 4.0 to 5.0, 5.0 to 10.0 or 10.0 to 15.0; The encapsulation layer material is a composite material formed from one or more of polylactic acid, polycaprolactone, and polypropylene. The tobacco additives include tobacco flavorings. When a user smokes a heated cigarette, the encapsulation layer is heated and breaks down under the temperature of the smoke, allowing the tobacco flavorings to pass through the encapsulation layer and be released onto the slow-release flavoring part.

2. The sealing unit according to claim 1, characterized in that, The opening shape of the wrapping layer is one or more of the following: square, rectangular, stepped, polygonal, star-shaped, elliptical, and conical.

3. The sealing unit according to claim 1, characterized in that, The slow-release flavoring part has a microporous structure, through which the tobacco additive permeates to the outside of the coating layer and is released into the user's mouth along with the smoke.

4. The sealing unit according to claim 3, characterized in that, The mesh size of the slow-release aromatic component is 6000-8000, 8000-10000, 10000-15000, 15000-20000, or 20000-24000.

5. The sealing unit according to claim 3, characterized in that, The tobacco additive is in liquid form.

6. The sealing unit according to claim 5, characterized in that, The storage unit is configured to have at least two units. The tobacco additives also include one or more of the following: smoke-generating agents, sugars, sweeteners, flavorings, colorings, preservatives, combustion improvers, and traditional Chinese medicines. The sealing unit contains storage sections for different tobacco additives, which are independently disposed on the surface of the slow-release flavoring section.

7. The sealing unit according to claim 6, characterized in that, The tobacco flavorings include flavoring materials using ethanol, propylene glycol, olive oil, and / or caprylic / capric triglycerides as solvents.

8. The sealing unit according to claim 1, characterized in that, The thickness of the encapsulation layer is 0.1–0.2 mm, 0.2–0.3 mm, 0.3–0.4 mm, or 0.4–0.5 mm.

9. The sealing unit according to claim 8, characterized in that, The coating layer is made of polylactic acid. The thickness of the coating layer is 40-50 micrometers, 50-60 micrometers, 60-70 micrometers, 70-80 micrometers, or 80-90 micrometers.

10. A heated cigarette, characterized in that, The heated cigarette includes a smoke-generating section, a cooling section, and a filter rod section, wherein the cooling section includes a sealing unit for the tobacco additive as described in any one of claims 1 to 9.

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