A heating cigarette flavor substance temperature-controlled release structure

Abstract

The application provides a heating cigarette flavor substance temperature control release structure and relates to the technical field of heating non-combustion, which comprises an external cavity and an internal cavity, flavor substances are arranged in the external cavity and the internal cavity, a first coating layer is arranged on the outside of the external cavity, a first opening is arranged on the first coating layer, a first sealing film is arranged at the first opening, a second coating layer is arranged on the outside of the internal cavity, a second opening is arranged on the second coating layer, a second sealing film is arranged at the second opening, and the levorotatory content of polylactic acid material of the first sealing film is lower than that of the second sealing film. The application can directly arrange a cage-shaped structure with multiple layers of flavor substances in a cigarette, is convenient to arrange, does not affect the properties of a tobacco core material, effectively protects the flavor substances from loss, releases the multiple layers of flavor substances in sequence at different temperatures of cigarette smoking, effectively ensures the aroma amount and temperature of the whole process of cigarette smoking, effectively neutralizes high-temperature smoke, reduces the temperature of smoked smoke, and makes the smoking taste better.

Description

Technical Field

[0001] This invention relates to the field of heated non-combustible technology, and in particular, to a structure for temperature-controlled release of flavor substances from heated cigarettes. Background Technology

[0002] Heated cigarettes generally refer to a new type of tobacco product that is heated at around 200℃ to 350℃ without burning. External heating is required to release the flavor components in the aroma-producing materials and nicotine from the tobacco, generating smoke that can be inhaled. Because heated cigarettes do not undergo high-temperature combustion and pyrolysis, the harmful components in their mainstream smoke are significantly reduced, thus lowering environmental smoke pollution. Therefore, heated cigarettes have become one of the fastest-growing new tobacco products in recent years.

[0003] However, heated cigarettes require a certain heating temperature to release smoke and aroma compounds during inhalation. Furthermore, the uniformity of aroma release during inhalation is crucial. Therefore, designs for uniform aroma release over inhalation are increasingly common in heated cigarettes. For example, Chinese invention patent CN113455699A discloses a heated cigarette with uniform aroma release per puff, comprising at least thin tobacco sheets produced using papermaking technology. The tobacco sheets are coated with a coating liquid containing composite particles of ester-based flavoring monomers. This technical solution coats the outer surface of conventional tobacco sheets with composite particles containing ester-based flavoring monomers, and these monomers are embedded within the porous material of these particles. When this tobacco sheet is shredded and prepared into a heated cigarette, the adsorption of the ester-based flavoring monomers within the porous material provides a slow-release effect, ensuring that the aroma content in the smoke remains relatively stable throughout the inhalation process.

[0004] However, the above-mentioned aroma release method still has the following drawbacks: 1. Coating each tobacco sheet with the coating liquid is labor-intensive and affects the properties of the tobacco sheet itself; 2. During the long-term storage of cigarettes, aroma substances will still be lost, resulting in reduced smoking stability; 3. Although the coating liquid has a slow-release effect on aroma, the effect is still limited, and the release of aroma substances in the first half is still higher than that in the second half; 4. As the heatable part of the smoking section decreases, the temperature in the second half of the cigarette smoking will rise uncontrollably, accompanied by an increase in burnt and impurity smells, affecting the smoking taste.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable and efficient temperature-controlled release structure for heated cigarette flavor substances. Summary of the Invention

[0006] The purpose of this invention is to provide a temperature-controlled release structure for aroma substances in heated cigarettes. This structure allows for the direct installation of multiple layers of cage-like structures containing aroma substances within the cigarette. This is convenient, does not affect the properties of the cigarette core material, and effectively protects the aroma substances from loss. At different smoking temperatures, the multiple layers of aroma substances are released sequentially, effectively ensuring a stable aroma throughout the smoking process. Furthermore, it can effectively neutralize high-temperature smoke, reduce the smoking temperature, and improve the smoking experience.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A temperature-controlled release structure for aroma substances in heated cigarettes is disposed within the cigarette's smoke-generating section. It includes an outer cavity and an inner cavity disposed inside the outer cavity. Both the outer and inner cavities contain aroma substances. A first coating layer is disposed on the outer side of the outer cavity, with a first opening filled with a first sealing film. A second coating layer is disposed on the outer side of the inner cavity, with a second opening filled with a second sealing film. Both the first and second sealing films are PLA (polylactic acid) films, and the levorotatory isocyanate content in the PLA of the first sealing film is lower than that in the PLA of the second sealing film.

[0009] This allows the first sealing film to melt at a first predetermined temperature during the latter half of the cigarette smoking process, releasing aroma from the flavoring substances in the outer cavity; the second sealing film melts at a second predetermined temperature, releasing aroma from the flavoring substances in the inner cavity.

[0010] As a preferred embodiment of the present invention, a transition cavity is provided between the outer cavity and the inner cavity, such that the transition cavity is disposed within the outer cavity and the inner cavity is disposed within the transition cavity.

[0011] As a preferred embodiment of the present invention, a third coating layer is provided on the outer side of the transition cavity, a third opening is provided on the third coating layer, and a third sealing film is filled at the third opening. The content of the levorotatory isomer in the PLA polylactic acid material of the first sealing film is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film, and the content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the second sealing film.

[0012] As a preferred embodiment of the present invention, the number of transition cavities is at least one, and each of the multiple transition cavities is provided with a covering layer, an opening and a sealing film, and the content of the levorotatory isomer in the PLA polylactic acid material of the sealing film of the outer transition cavity is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the sealing film of the inner transition cavity.

[0013] As a preferred embodiment of the present invention, both the first covering layer and the second covering layer are skeleton support members.

[0014] Preferably, the volume of the outer cavity is smaller than the volume of the inner cavity.

[0015] As a preferred embodiment of the present invention, the size of the first opening is smaller than the size of the second opening.

[0016] As a preferred embodiment of the present invention, at least a portion of the second opening is arc-shaped.

[0017] The beneficial effects of the temperature-controlled release structure of heated cigarette flavor substances of the present invention are as follows:

[0018] A multi-layered cage-like structure containing flavoring substances can be directly set inside the cigarette. This is convenient to set up and does not affect the properties of the cigarette core material. The multi-layered cage-like structure effectively protects the flavoring substances and prevents them from being lost. At different smoking temperatures, the flavoring substances are released sequentially from the multiple layers, effectively ensuring a stable amount of aroma throughout the smoking process. In addition, it can effectively neutralize high-temperature smoke, reduce the smoking temperature, and improve the smoking experience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a heated cigarette flavor substance temperature control release structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the first coating layer in one embodiment of a temperature-controlled release structure for heated cigarette flavor substances according to the present invention.

[0021] Figure 3 This is a schematic diagram of the planar structure of the first coating layer in one embodiment of a temperature-controlled release structure for heated cigarette flavor substances according to the present invention;

[0022] Figure 4 This is a schematic diagram of the planar structure of the second coating layer in one embodiment of a temperature-controlled release structure for heated cigarette flavor substances according to the present invention;

[0023] Figure 5 This is a schematic diagram of the planar structure of the first coating layer in another embodiment of the temperature-controlled release structure of heated cigarette flavor substances according to the present invention;

[0024] Figure 6 This is a schematic diagram of the overall structure of another embodiment of the temperature-controlled release structure of heated cigarette flavor substances according to the present invention;

[0025] In the figure: 1. Outer cavity, 11. First covering layer, 12. First opening, 13. First sealing film, 2. Inner cavity, 21. Second covering layer, 22. Second opening, 23. Second sealing film; 3. Transition cavity. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the invention.

[0028] At the same time, it should be understood that, for ease of description, the process shown in the attached diagram is not performed in isolation, but rather involves multiple steps that overlap.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and systems known to a person skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the license specification.

[0032] Example 1: As Figures 1 to 6 The diagram shown is merely one embodiment of the present invention. A temperature-controlled release structure for heated cigarette flavoring substances is disposed within the cigarette's smoking section. It includes an outer cavity 1 and an inner cavity 2 disposed inside the outer cavity 1. Flavoring substances are disposed in both the outer cavity 1 and the inner cavity 2. A first covering layer 11 is disposed on the outer side of the outer cavity 1, and a first opening 12 is provided on the first covering layer 11. A first sealing film 13 is filled at the first opening 12. A second covering layer 21 is disposed on the outer side of the inner cavity 2, and a second opening 22 is provided on the second covering layer 21. A second sealing film 23 is filled at the second opening 22. Both the first sealing film 13 and the second sealing film 23 are PLA polylactic acid films, and the levorotatory isomer content in the PLA polylactic acid material of the first sealing film 13 is lower than the levorotatory isomer content in the PLA polylactic acid material of the second sealing film 23.

[0033] In this invention, the entire temperature-controlled release structure is a closed cage-like structure, which is directly set in the smoke-generating section of the heated cigarette. Of course, the smoke-generating section also contains flavored tobacco core material. This cage-like structure has at least two layers, which divides the dragon-like structure into an inner cavity 2 and an outer cavity 1. Both the inner cavity 2 and the outer cavity 1 are filled with flavoring substances, which can release aroma at a certain temperature to improve the smoking experience of the heated cigarette.

[0034] The outer cavity 1 is covered by the first covering layer 11 and isolated from the outside world, and the inner cavity 2 is covered by the second covering layer 21 and isolated from the outer cavity 1. Therefore, the inner cavity 1 is the space inside the second covering layer 21, and the outer cavity 1 is actually a ring structure between the first covering layer 11 and the second covering layer 21.

[0035] Of course, neither the first covering layer 11 nor the second covering layer 21 is a sealed structure. The first covering layer 11 is provided with a first opening 12, so that the outer cavity 1 can interact with the outside world through the first opening 12. The fragrance substance in the outer cavity 1 can pass through the first opening 12 to release the fragrance and be inhaled by the smoker. Similarly, the second covering layer 21 is provided with a second opening 12, so that the fragrance substance in the inner cavity 2 can pass through the second opening 22 to release the fragrance.

[0036] In this invention, the first opening 12 is filled with a first sealing film 13; the second opening 22 is filled with a second sealing film 23; both the first sealing film 13 and the second sealing film 23 are PLA polylactic acid films; the PLA polylactic acid film can seal the first opening 12 and the second opening 22, so that the aroma substances in the outer cavity 1 and the inner cavity 2 will not escape when the cigarette is transported or stored, ensuring that the aroma is sufficient when smoking; moreover, the PLA polylactic acid film has high temperature resistance. Only when the temperature of the PLA polylactic acid film is reached during smoking will the PLA polylactic acid film melt and crack, so that the aroma substances in the cage structure can be released and smoked by the smoker, improving the smoker's taste.

[0037] Moreover, polylactic acid (PLA) is produced by fermenting starch from renewable plant resources to obtain lactic acid, and then chemically synthesized into a polymer material. It has good recyclability and biodegradability, and will not produce burnt gas or pollution after melting, and will not affect the smoking experience.

[0038] It should be noted that the content of the levorotatory isomer in the PLA polylactic acid material of the first sealing film 13 is lower than that in the PLA polylactic acid material of the second sealing film 23. The melting point and crystallinity of PLA are related to the molecular weight of the polymer and the content of levorotatory lactic acid monomer. The higher the levorotatory isomer content in the polylactic acid material, the higher the crystallinity of the polylactic acid and the better the temperature resistance. Therefore, the temperature resistance of the second sealing film 23 is higher than that of the first sealing film 13. In other words, the melting temperature of the second sealing film 23 is higher than that of the first sealing film 13.

[0039] When the smoking section of the heated cigarette is inserted into the heating chamber of the heated smoking device for heating and inhalation, as the heating temperature increases, the first sealing film 13 melts first, and the aroma substances in the outer chamber 1 release their aroma into the smoke and are inhaled by the smoker; then the temperature continues to rise, the second sealing film 23 melts again, and the aroma substances in the inner chamber 2 release their aroma into the smoke and are inhaled by the smoker.

[0040] Due to the characteristics of cigarette smoking, the aroma release of flavor substances in the cigarette core material is uneven after heating. As the heating time increases, the amount of aroma released will decrease significantly. Generally, the cigarette core material releases more than 70% of its aroma in the first half of smoking, while the aroma is very sparse in the second half. Moreover, even if the heating device power remains unchanged, as the amount of substances that can be heated and decomposed in the cigarette decreases, the temperature inside the heating chamber will naturally increase in the second half of smoking. As a result, the burnt smell will be more obvious. To avoid insufficient aroma in the second half and poor smoking experience, it is best if the melting temperature of the first sealing film 13 is after the temperature inside the heating chamber begins to rise in the second half of smoking.

[0041] In other words, during the first half of smoking, the cigarette is heated to temperature T1. At this point, the first sealing film 13 does not melt, and the aroma is released solely by the tobacco core material itself. During the second half of smoking, when the cigarette temperature rises to T2, the first sealing film 13 melts, and the aroma substances in the outer cavity 1 release aroma to flavor the cigarette. When the cigarette continues to heat up to T3, the second sealing film melts, and the aroma substances in the inner cavity 2 release aroma to flavor the cigarette. Wherein T1... <T2<T3。

[0042] This allows for a smooth release of aroma as the temperature rises, compensating for the lack of aroma in the latter half of the inhalation. Moreover, temperature is the key to controlling the gradual release of aroma, eliminating the need for manual control.

[0043] In summary, when the smoking device heats up during the latter half of cigarette smoking, the first sealing film 13 melts at a first predetermined temperature, and the aroma substance in the outer cavity 1 releases aroma; the second sealing film 23 melts at a second predetermined temperature, and the aroma substance in the inner cavity 2 releases aroma, wherein the first predetermined temperature is lower than the second predetermined temperature.

[0044] This invention discloses a temperature-controlled release structure for aroma substances in heated cigarettes. It allows for the direct installation of multiple layers of cage-like structures containing aroma substances within the cigarette. This design is convenient, does not affect the properties of the cigarette core material, and effectively protects the aroma substances from loss. At different smoking temperatures, the multiple layers of aroma substances are released sequentially, effectively ensuring a stable aroma throughout the smoking process and resulting in a better smoking experience.

[0045] Example 2, still as Figures 1 to 6 As shown, this is only one embodiment of the present invention. Based on the first embodiment, in the temperature-controlled release structure of heated cigarette flavor substances of the present invention, the first coating layer 11 and the second coating layer 12 are both skeleton support members, generally whisker-like members composed of calcium carbonate and phosphoric anhydride fibers. The purpose is to enable the solid melt that forms support during cigarette combustion to support the entire cage-like structure without collapsing, and to effectively cover the entire dragon-shaped structure with ash.

[0046] Furthermore, the volume of the outer cavity 1 is smaller than the volume of the inner cavity 2. In other words, the volume of the annular structure between the first covering layer 11 and the second covering layer 21 is smaller than the volume of the space within the second covering layer 21. This allows the inner cavity 2 to store more aroma compounds. As the smoking progresses, the amount of aroma compounds released from the core material decreases. To ensure sufficient aroma, more aroma compounds need to be released for neutralization. Therefore, the inner cavity 2, which releases aroma compounds later in the smoking process, contains more aroma compounds.

[0047] One more point needs to be made in this invention: the temperature control of this invention is not only controlled by the increase in temperature for the multi-stage release of aroma in the entire cage structure, but also the release of aroma substances can neutralize the high-temperature smoke, thereby reducing the temperature of the smoke inhaled by the smoker.

[0048] Because of the presence of the PLA polylactic acid membrane, the aroma substances inside are less heated and have a lower temperature before the PLA polylactic acid membrane melts and ruptures. Once the PLA polylactic acid membrane melts and ruptures, it is already in the latter half of the cigarette's heating stage. The released low-temperature aroma substances and low-temperature fragrance will neutralize the high-temperature smoke and reduce the temperature of the smoke in the smoker's mouth. Moreover, the higher the temperature, the more low-temperature aroma substances are released in the internal cavity 2, and the better the effect of neutralizing the smoke temperature.

[0049] The entire cage-like structure can then be placed in the area near the mouthpiece section of the cigarette's smoke-generating section for better smoke neutralization. Of course, the number of temperature-controlled release structures in this invention is at least one, and there can be multiple cage-like structures distributed in the smoke-generating section.

[0050] Moreover, the size of the first opening 12 is smaller than the size of the second opening 22. Here, the first covering layer 11 is provided with a number of first openings 12, and the second covering layer 21 is provided with a number of second openings 22. In fact, this means that the sum of the sizes of all the first openings 12 on the first covering layer 11 is less than the sum of the sizes of all the second openings on the second covering layer 21. Therefore, the later the time, when the PLA polylactic acid film breaks and melts, the easier it is for the aroma substances to escape, which can better neutralize the temperature of the flue gas and provide more aroma.

[0051] Finally, at least a portion of the second opening 22 is arc-shaped, preferably the second opening 22 is a circular hole, and several second openings 22 are evenly distributed on the second covering layer 21, so that the second opening 22 has a large area and is easier to release the aroma.

[0052] Example 3, still as Figures 1 to 6 As shown, this is only one embodiment of the present invention. Based on any of the above embodiments, in the temperature-controlled release structure of heated cigarette flavor substances of the present invention, a transition cavity 3 is provided between the outer cavity 1 and the inner cavity 2, such that the transition cavity 3 is disposed in the outer cavity 1 and the inner cavity 2 is disposed in the transition cavity 3.

[0053] In other words, the cage-like structure of the entire temperature control release structure is not just a two-layer structure, but a three-layer structure, with a transition cavity 3 set between the outer cavity 1 and the inner cavity 2 to form a three-layer cage-like structure.

[0054] Of course, a third covering layer is provided on the outside of the transition cavity 3, and a third opening is provided on the third covering layer. The third opening is filled with a third sealing film. The content of the levorotatory isomer in the PLA polylactic acid material of the first sealing film 13 is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film, and the content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the second sealing film 23.

[0055] In other words, the outer cavity 1 releases aroma at the first temperature, the transition cavity 3 releases aroma at the second temperature, and the inner cavity 2 releases aroma at the third temperature. The first temperature is lower than the second temperature, and the second temperature is lower than the third temperature.

[0056] Furthermore, the number of transition cavities 3 is at least one, so that the entire temperature-controlled release structure forms at least four cage-like structures; each of the multiple transition cavities is provided with a covering layer, an opening and a sealing film, and the content of the levorotatory isomer in the PLA polylactic acid material of the sealing film of the outer transition cavity 3 is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the sealing film of the inner transition cavity 3.

[0057] In short, the innermost cavity requires a higher temperature to break the seal and release the aroma. When the temperature rises, the multi-layered cage-like structure will crack open from the outside to the inside to release the aroma.

[0058] Similarly, all cavities, including the inner cavity 2, the transition cavity 3, and the outer cavity 1, follow the following rule: the further inward you go, the larger the cavity volume becomes; the further inward you go, the larger the sum of the opening sizes on the covering layer becomes.

[0059] This invention discloses a temperature-controlled release structure for aroma substances in heated cigarettes. It allows for the direct installation of multiple layers of cage-like structures containing aroma substances within the cigarette, making installation convenient and not affecting the properties of the cigarette core material. The multi-layered cage structure effectively protects the aroma substances from loss. At different smoking temperatures, the multiple layers of aroma substances are released sequentially, effectively ensuring a stable aroma throughout the smoking process. Furthermore, it effectively neutralizes high-temperature smoke, lowers the smoking temperature, and improves the smoking experience.

[0060] This invention is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this invention should be included within the scope of protection of this invention.

Claims

1. A temperature-controlled release structure for heated cigarette flavor substances, disposed within the cigarette smoke-generating section, characterized in that: The device includes an outer cavity (1) and an inner cavity (2) disposed inside the outer cavity (1). Both the outer cavity (1) and the inner cavity (2) are provided with fragrance substances. The outer cavity (1) is provided with a first covering layer (11) on the outside. The first covering layer (11) is provided with a first opening (12) and the first opening (12) is filled with a first sealing film (13). The inner cavity (2) is provided with a second covering layer (21) on the outside. The second covering layer (21) is provided with a second opening (22) and the second opening (22) is filled with a second sealing film (23). The first sealing film (13) and the second sealing film (23) are both PLA polylactic acid films, and the content of the levorotatory isomer in the PLA polylactic acid material of the first sealing film (13) is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the second sealing film (23). When the cigarette device heats up during the latter half of smoking, the first sealing film (13) melts at a first predetermined temperature, and the aroma substance in the outer cavity (1) releases aroma; the second sealing film (23) melts at a second predetermined temperature, and the aroma substance in the inner cavity (2) releases aroma.

2. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 1, characterized in that: A transition cavity (3) is provided between the outer cavity (1) and the inner cavity (2), such that the transition cavity (3) is located in the outer cavity (1) and the inner cavity (2) is located in the transition cavity (3).

3. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 2, characterized in that: A third covering layer is provided on the outside of the transition cavity (3), and a third opening is provided on the third covering layer. The third opening is filled with a third sealing film. The content of the levorotatory isomer in the PLA polylactic acid material of the first sealing film (13) is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film. The content of the levorotatory isomer in the PLA polylactic acid material of the third sealing film is lower than the content of the levorotatory isomer in the PLA polylactic acid material of the second sealing film (23).

4. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 2, characterized in that: The number of transition cavities (3) is at least one, and each of the multiple transition cavities is provided with a covering layer, an opening and a sealing film. The content of the levorotatory polylactic acid material in the sealing film of the outer transition cavity (3) is lower than the content of the levorotatory polylactic acid material in the sealing film of the inner transition cavity (3).

5. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 1, characterized in that: Both the first covering layer (11) and the second covering layer (21) are skeleton support components.

6. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 1, characterized in that: The volume of the outer cavity (1) is smaller than the volume of the inner cavity (2).

7. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 1, characterized in that: The size of the first opening (12) is smaller than the size of the second opening (22).

8. The structure for temperature-controlled release of aroma substances from heated cigarettes according to claim 1, characterized in that: At least a portion of the second opening (22) is arc-shaped.

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