Flavor sustained-release unit and heated cigarette

Abstract

The present application discloses a flavor sustained-release unit and a heated cigarette. The flavor sustained-release unit includes a substrate, a wrapping layer, a flavor and a heat-expandable material. The wrapping layer is connected to the substrate and forms a closed cavity. The flavor and the heat-expandable material are mixed and filled in the cavity. The flavor sustained-release unit fills the cavity formed by the substrate and the wrapping layer with a mixture of the flavor and the heat-expandable material. The heat-expandable material reacts sensitively to the temperature of the smoke. Under the action of the smoke temperature, the heat-expandable material will expand rapidly, thereby separating the closed bonding surface between the wrapping layer and the substrate, allowing the flavor sealed in the cavity to volatilize and the characteristic aroma to be released slowly. The above-mentioned flavor sustained-release unit expands the range of the bonding strength between the substrate and the wrapping layer.

Description

Technical Field

[0001] The present application relates to the technical field of flavor carrying and sustained release, and in particular to a flavor sustained release unit and a heated cigarette. Background Art

[0002] Placing a flavor slow-release unit in a heated cigarette can preserve the flavor for a long time and effectively slow-release the flavor during the smoking process of the heated cigarette. The essential requirements of the flavor slow-release unit are: it can effectively seal the flavor for a long time, and effectively and slowly release the flavor during the smoking process of the heated cigarette. The stronger the seal, the more difficult it is to effectively slow-release, that is, to break the seal. These two requirements are contradictory. Therefore, it is a technical problem that needs to be solved to enable the flavor slow-release unit to be sealed for a long time and to slowly break and release the flavor when smoke passes through. Summary of the invention

[0003] The present invention provides a flavor sustained-release unit and a heated cigarette to solve the technical problem in the prior art that the flavor needs to be sealed for a long time and the seal needs to be broken to release the flavor when smoke passes through.

[0004] To achieve the above object, the technical solution provided by the present invention is as follows:

[0005] In a first aspect of the present invention, a fragrance sustained-release unit is provided, comprising a substrate, a wrapping layer, a fragrance and a thermally expandable material, wherein the wrapping layer is connected to the substrate and forms a closed cavity, and the fragrance and the thermally expandable material are mixed and filled in the cavity.

[0006] Furthermore, the thermally expandable material is selected from one or more of polyvinylidene chloride, vinyl acetate copolymer, and polychlorotrifluoroethylene.

[0007] Furthermore, the mass ratio of the thermally expandable material to the fragrance is 3 to 10:1.

[0008] Furthermore, the flavor sustained-release unit also includes a temperature-sensitive material layer, which is arranged on a side of the substrate opposite to the wrapping layer. Before the temperature-sensitive material layer changes phase, the substrate is connected to the wrapping layer; after the temperature-sensitive material layer changes phase, the substrate is separated from the wrapping layer.

[0009] Furthermore, the phase change temperature of the temperature-sensitive material layer is 60°C to 90°C.

[0010] Furthermore, the material of the temperature-sensitive material layer is selected from one or more of hot melt adhesive, microgel, and hydrogel.

[0011] Furthermore, the thickness of the temperature-sensitive material layer is 0.01-0.05 mm.

[0012] Furthermore, the material of the wrapping layer is selected from one or more of polylactic acid, polypropylene and polyethylene.

[0013] A second aspect of the present invention provides a heated cigarette comprising the above-mentioned flavor sustained-release unit.

[0014] The fragrance slow-release unit provided by the present invention is filled with a mixture of fragrance and heat-expandable material in the cavity formed by the substrate and the wrapping layer. The heat-expandable material is sensitive to the temperature of the smoke. Under the action of the smoke temperature, the heat-expandable material will expand rapidly, thereby separating the sealed bonding surface between the wrapping layer and the substrate, allowing the fragrance sealed in the cavity to volatilize and the characteristic fragrance to be slowly released. The fragrance slow-release unit expands the range of the bonding strength between the substrate and the wrapping layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a flavor sustained-release unit in an embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the disassembly of the structure of the fragrance sustained-release unit in an embodiment of the present invention.

[0018] Reference numerals:

[0019] 1. Base material; 2. Wrapping layer; 3. Fragrance; 4. Thermal expansion material; 5. Temperature sensitive material layer. DETAILED DESCRIPTION

[0020] 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 will be 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.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the 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.

[0023] 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.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] like Figure 1 , Figure 2 As shown, an embodiment of the present application provides a flavor sustained-release unit, comprising a substrate 1, a wrapping layer 2, a flavor 3 and a heat-expandable material 4, wherein the wrapping layer 2 is connected to the substrate 1 and forms a closed cavity, and the flavor 3 and the heat-expandable material 4 are mixed and filled in the cavity.

[0026] In the embodiment of the present application, the physical form of the flavor 3 can be solid, liquid or paste. The physical form of the heat-expandable material 4 can be solid powder or liquid. Specifically, the mass ratio of the heat-expandable material 4 to the flavor 3 is 3 to 10:1. The substrate 1 can be made of a material such as cigarette wrapping paper. The material of the wrapping layer 2 is selected from one or more of polylactic acid, polypropylene, and polyethylene.

[0027] The flavor in the flavor sustained-release unit can be sealed and stored in the cavity for a long time, and can be released into the smoke when the smoke passes through, which puts higher requirements on the bonding strength between the substrate and the wrapping layer. In addition, under normal circumstances, the flavor sustained-release unit can be placed in the hollow section and the cooling pipe section of the heated cigarette, but the applicant found that the temperature of the smoke is higher when passing through the hollow section, and the temperature is relatively low when passing through the cooling pipe section. Therefore, when placed in the above different positions, the sealing strength requirements for the flavor sustained-release unit are different, which puts higher requirements on the sealing of the flavor sustained-release unit.

[0028] The flavor sustained-release unit of the embodiment of the present application is a mixture of flavor 3 and heat-expandable material 4 filled in the cavity formed between the substrate 1 and the wrapping layer 2. The heat-expandable material 4 reacts sensitively to the temperature of the smoke. Under the action of the smoke temperature, the heat-expandable material 4 will expand rapidly, thereby separating the sealed bonding surface between the wrapping layer 2 and the substrate 1, allowing the flavor 3 sealed in the cavity to evaporate and the characteristic aroma to be sustained-released.

[0029] The flavor sustained-release unit of the embodiment of the present application requires that the seal between the substrate 1 and the wrapping layer 2 is sufficiently strong. No matter it is placed in the hollow section or the cooling pipe section, when the smoke passes through the flavor sustained-release unit, the seal between the substrate 1 and the wrapping layer 2 can be promptly and effectively broken, thereby slowly releasing the characteristic aroma of the flavor 3.

[0030] In some embodiments, the heat-expandable material 4 is selected from one or more of polyvinylidene chloride, vinyl acetate copolymer, and polychlorotrifluoroethylene. The heat-expandable material 4 is non-toxic and harmless, and is sensitive to temperature and can expand rapidly under the temperature of the flue gas.

[0031] In some embodiments, the flavor sustained-release unit further includes a temperature-sensitive material layer 5, which is disposed on a side of the substrate 1 opposite to the wrapping layer 2. Before the temperature-sensitive material layer 5 changes phase, the substrate 1 is connected to the wrapping layer 2; after the temperature-sensitive material layer 5 changes phase, the substrate 1 is separated from the wrapping layer 2.

[0032] In the embodiment of the present application, the temperature-sensitive material layer 5 can be connected to the substrate 1 and the wrapping layer 2 respectively by bonding. The temperature-sensitive material can be coated on the substrate 1, and then the substrate 1 and the wrapping layer 2 are connected together by bonding. After curing, the temperature-sensitive material forms the temperature-sensitive material layer 5. The above-mentioned flavor sustained-release unit can seal and preserve the flavor 3 for a long time at room temperature. Under the action of the smoke temperature, the temperature-sensitive material layer 5 can undergo a change in physical form, thereby realizing the separation of the substrate 1 and the wrapping layer 2, and allowing the flavor 3 filled in the cavity to evaporate to realize the characteristic aroma of the smoke. Specifically, the phase change temperature of the temperature-sensitive material layer is 60°C to 90°C.

[0033] In the embodiment of the present application, the effect of the heat-expandable material 4 is combined with the effect of the temperature-sensitive material layer 5. During the smoking process of the heated cigarette, under the action of the smoke temperature, the heat-expandable material 4 expands rapidly, exerting external force on the bonding surface between the substrate 1 and the wrapping layer 2. At the same time, the physical morphology change of the temperature-sensitive material makes the bonding surface easier to break. Under the action of the heat-expandable material 4, the bonding surface is broken evenly and slowly, rather than in an instantaneous explosion, which will not cause a bad effect on the sensory experience of smoking.

[0034] Specifically, the material of the temperature-sensitive material layer 5 is selected from one or more of hot melt adhesive, microgel, and hydrogel. The thickness of the temperature-sensitive material piece 5 is 0.01-0.05 mm.

[0035] The flavor sustained-release unit of the embodiment of the present application has a good sealing effect that can preserve the flavor 3 for a long time during the placement of the heated cigarette; during the smoking process of the heated cigarette, under the action of the smoke temperature, the heat-expandable material 4 in the cavity between the substrate 1 and the wrapping layer 2 expands rapidly, and the physical form of the temperature-sensitive material layer 5 changes. Under the dual action of the two, the original sealed joint surface between the substrate 1 and the wrapping layer 2 is broken, and the built-in flavor 3 evaporates into the smoke, thereby achieving the sustained-release effect of the flavor 3.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flavor sustained-release unit, characterized in that: It comprises a base material, a wrapping layer, a fragrance and a heat-expandable material, wherein the wrapping layer is connected to the base material to form a closed cavity, and the fragrance and the heat-expandable material are mixed and filled in the cavity; The flavor sustained-release unit also includes a temperature-sensitive material layer, which is arranged on a side of the substrate opposite to the wrapping layer. Before the temperature-sensitive material layer changes phase, the substrate is connected to the wrapping layer; after the temperature-sensitive material layer changes phase, the substrate is separated from the wrapping layer.

2. The flavor sustained-release unit according to claim 1, characterized in that: The thermally expandable material is selected from one or more of polyvinylidene chloride, vinyl acetate copolymer, and polychlorotrifluoroethylene.

3. The flavor sustained-release unit according to claim 1, characterized in that: The mass ratio of the thermally expandable material to the fragrance is 3 to 10:

1.

4. The flavor sustained-release unit according to any one of claims 1 to 3, characterized in that: The phase change temperature of the temperature-sensitive material layer is 60°C to 90°C.

5. The flavor sustained-release unit according to any one of claims 1 to 3, characterized in that: The material of the temperature-sensitive material layer is selected from one or more of hot melt adhesive, microgel and hydrogel.

6. The flavor sustained-release unit according to any one of claims 1 to 3, characterized in that: The thickness of the temperature-sensitive material layer is 0.01-0.05 mm.

7. The flavor sustained-release unit according to any one of claims 1 to 3, characterized in that: The material of the wrapping layer is selected from one or more of polylactic acid, polypropylene and polyethylene.

8. A heated cigarette, characterized in that: The heated cigarette comprises the flavor sustained-release unit according to any one of claims 1 to 7.

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