Cooling and harm-reducing material for heating cigarette, preparation method of cooling and harm-reducing material and heating cigarette

Abstract

The invention discloses a cooling and harm-reducing material for heating cigarettes, a preparation method of the cooling and harm-reducing material and the heating cigarettes, and belongs to the technical field of tobaccos. The preparation method provided by the invention comprises the following steps: heating and dissolving a natural polymer material and choline ionic liquid to form a uniform solution; the mass fraction of the natural high polymer material is 3-15 wt%; and coating an internal base material of a heated cigarette with the solution while the solution is hot, and cooling to room temperature to obtain the temperature-reducing and harm-reducing material for heating the cigarette. The preparation method is very simple, the prepared cooling and harm reducing material for heating the cigarettes can effectively reduce the smoke temperature and reduce harmful gas release, meanwhile, liquid leakage is avoided in the application process, and high safety is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco, and in particular to a temperature-reducing and harm-reducing material for heated cigarettes, a preparation method thereof, and heated cigarettes. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] In recent years, with the increasing efforts of international tobacco control and people's increasing attention to health, new tobacco products with lower harm than traditional cigarettes have gradually emerged, and heated cigarettes have received more and more attention. Heated cigarettes, also known as heat-not-burn cigarettes, refer to a new type of tobacco product that uses a special heat source to heat tobacco materials and then releases smoke. The tobacco materials are only heated but not burned. Compared with traditional cigarettes, they greatly reduce the harm of tobacco products to the human body.

[0004] In order to meet the requirements of smokers, heated cigarettes are generally shorter in length and have lower smoke resistance to improve the taste of inhaled smoke. Although the aerosol produced by heated cigarettes has a lower temperature, due to the low heating temperature, high smoke water content, and shortened smoke passage, the sensory temperature of the mainstream smoke reaching the mouth is higher than that of traditional cigarettes. Therefore, consumers will have a certain burning sensation when smoking heated cigarettes, and it will cause certain damage to consumers' oral viscosity, tracheal mucosa, etc. The burning sensation will be even worse in the later stage of smoking cigarettes due to the further shortening of smoke heat exchange time, affecting the smoking quality of cigarettes.

[0005] Adding cooling materials is one of the main means to alleviate the burning problem caused by heated cigarettes in the existing technology. The existing cooling materials include phase change materials, mainly including polymer phase change materials (polylactic acid, polyethylene glycol), water-based phase change materials (water and salt phase change materials) and water-based cooling materials. However, the current cooling materials have problems such as poor cooling effect, single effect, and liquid leakage risk.

[0006] Therefore, how to provide a cooling and harm reduction material for heated cigarettes that has both cooling and harm reduction functions, good cooling effect, simple preparation method and no risk of liquid leakage is an urgent problem to be solved. Summary of the invention

[0007] In view of this, the present invention provides a cooling and harm reduction material for heated cigarettes, a preparation method thereof, and heated cigarettes. The cooling and harm reduction material for heated cigarettes provided by the present invention has a good cooling effect, and also has the effect of reducing the release of harmful substances in smoke. The preparation method is simple, and the source of raw materials is safe and environmentally friendly.

[0008] In a first aspect, the present invention provides a method for preparing a temperature-reducing and harm-reducing material for heating cigarettes, comprising the following steps:

[0009] The natural polymer material and the choline ionic liquid are heated and dissolved to form a uniform solution; the mass fraction of the natural polymer material is 3 to 15 wt%;

[0010] The solution is coated onto the inner substrate of the heated cigarette while it is hot, and then cooled to room temperature to obtain the temperature-reducing and harm-reducing material for the heated cigarette.

[0011] In a second aspect, the present invention provides a cooling and harm reduction material for heated cigarettes prepared by the above preparation method.

[0012] In a third aspect, the present invention provides a heated cigarette, which includes the above-mentioned temperature-reducing and harm-reducing material for heated cigarettes.

[0013] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0014] The preparation method of the cooling and harm reduction material for heated cigarettes provided by the present invention is very simple, and the raw materials of the cooling and harm reduction material for heated cigarettes prepared have good safety and will not have adverse effects on the human body; the choline ionic liquid therein can effectively absorb harmful substances such as acrolein and 3-chloro-1,2-propylene glycol in the smoke, and reduce the release of harmful components of heated cigarettes. At the same time, as a gel phase change material, the material can absorb part of the heat of the smoke when the phase change temperature is reached, and can also absorb part of the moisture in the smoke, thereby effectively reducing the temperature of the smoke; the natural polymer material therein will form a gel after heating and cooling, which can effectively prevent liquid leakage when used, and has high safety. DETAILED DESCRIPTION

[0015] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0016] The present invention provides a method for preparing a temperature-reducing and harm-reducing material for heating cigarettes, comprising the following steps:

[0017] The natural polymer material and the choline ionic liquid are heated and dissolved to form a uniform solution;

[0018] The solution is coated onto the inner substrate of the heated cigarette while it is hot, and then cooled to room temperature to obtain the temperature-reducing and harm-reducing material for the heated cigarette.

[0019] In the above preparation method of the present invention, choline ionic liquid is used as a solvent for natural polymers and can dissolve natural polymer materials; after the natural polymer materials are heated and dissolved, the macromolecules are randomly distributed in a coil shape, and when the temperature is reduced to room temperature, the macromolecular chains are connected by hydrogen bonds, and a solid gel is formed after cooling; at the same time, since there is also a hydrogen bond interaction between the macromolecular chains of the natural polymer materials and the choline ionic liquid, the natural polymer can become a good carrier of the choline ionic liquid, and since the choline ionic liquid still has a high viscosity after the solid-liquid phase change, under the wrapping effect of the gel and the limitation of the internal space of the heated cigarette, the present invention can effectively avoid liquid leakage during the phase change process and has high safety. Choline ionic liquid is a phase change material. When it reaches the phase change temperature, the solid-liquid phase change process can absorb the heat of the smoke, and it also has good water absorption, so that it can effectively reduce the smoke temperature of the heated cigarette; and choline ionic liquid can also absorb harmful substances such as acrolein and 3-chloro-1,2-propylene glycol in the smoke, thereby reducing the release of harmful components of the heated cigarette.

[0020] The preparation method of the cooling and harm reduction material for heated cigarettes provided by the present invention is very simple, and the prepared raw materials of the cooling and harm reduction material for heated cigarettes have good safety and will not have adverse effects on the human body.

[0021] The mass fraction of the natural polymer material of the present invention is 3 to 15 wt %, more preferably 5 to 10 wt %, which refers to the ratio of the mass of the natural polymer material to the total mass of the natural polymer material and the choline ionic liquid. Too much addition of the natural polymer material may cause its solubility to deteriorate, making it difficult to form a gel with a uniform and stable structure, so the addition amount should not be too much.

[0022] In the present invention, the temperature-reducing and harm-reducing material for heated cigarettes has a gel transition point of 50-70° C., and can absorb smoke heat when it undergoes a gel-liquid phase transition, thereby reducing the smoke temperature.

[0023] In the present invention, the cation of the choline ionic liquid is a choline cation, and the anion of the choline ionic liquid includes one or more of lysine, glycine, alanine, phenylalanine, and threonine.

[0024] In the present invention, the natural polymer includes one or more of agarose, gelatin, chitosan or pectin. These natural polymers can be dissolved by heating and can form gel after cooling, thereby providing a good carrier for the ionic liquid.

[0025] In the present invention, the internal substrate of the heated cigarette includes a filter rod lumen, a filter tip tow or a cooling element. The present invention does not impose any special restrictions on the filter rod lumen, the filter tip tow or the cooling element, and the materials disclosed in the art can be used. In the present invention, the cooling element includes one or more of metal foil, polymer film, paper, non-woven fabric, aerogel or porous material. The polymer film includes one or more of cellulose acetate (CA), polyethylene (PE), polypropylene (PE), polyvinyl chloride (PVC), polylactic acid (PLA) or polyethylene terephthalate (PET); the non-woven fabric includes one or more of paper non-woven fabric, acetate fiber non-woven fabric, polylactic acid non-woven fabric, polyethylene non-woven fabric, polypropylene non-woven fabric or polyterephthalate non-woven fabric; the porous material includes one or more of porous carbon material, porous ceramic material or porous polymer microspheres. All of the above materials can be selected according to the needs of those skilled in the art.

[0026] In the present invention, the temperature of heating and dissolving is 80-120° C., and the time of heating and dissolving is 0.5-2 hours, so as to ensure the complete melting of the choline ionic liquid and the complete dissolution of the natural polymer.

[0027] In the present invention, the coating thickness is 0.2-1 mm. If the coating thickness is too thin, it will be difficult to fully exert its cooling and harm reduction effects.

[0028] It is understandable that other functional materials, such as flavoring agents, enhancers, etc., can be added during the preparation of the above-mentioned cooling and harm reduction materials for heated cigarettes to exert more functions, as long as the cooling and harm reduction functions are not affected. The present invention does not impose any special restrictions on this.

[0029] The present invention also provides a temperature-reducing and harm-reducing material for heated cigarettes prepared by the above-mentioned preparation method. The temperature-reducing and harm-reducing material for heated cigarettes has good temperature-reducing and harm-reducing effects and is highly safe.

[0030] The present invention also provides a heated cigarette, which includes the above-mentioned cooling and harm reduction material for heated cigarettes. The present invention does not impose any special restrictions on the preparation method of the heated cigarette, as long as the prepared heated cigarette internal substrate coated with the cooling and harm reduction material for heated cigarettes is arranged inside the heated cigarette, so that it can play a cooling and harm reduction role.

[0031] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0032] Example 1

[0033] This embodiment provides a method for preparing a temperature-reducing and harm-reducing material and a heated cigarette.

[0034] S1. Dissolve 5 wt % agarose and ionic liquid [choline][glycine] ([Ch][Gly]) by stirring and heating at 90° C. for 1 h to obtain a uniform solution.

[0035] S2. Apply the above solution onto acetate fiber nonwoven fabric with a coating thickness of 1.0 mm.

[0036] S3, waiting for the solution to cool and solidify into a gel to obtain a temperature-reducing and harm-reducing material.

[0037] S4. Curling the above-mentioned material and placing it in the hollow filter section of the heated cigarette mouthpiece to prepare a heated cigarette containing the cooling and harm-reducing material.

[0038] Example 2

[0039] This embodiment provides a method for preparing a temperature-reducing and harm-reducing material and a heated cigarette.

[0040] S1. 8 wt% gelatin and ionic liquid [choline][alanine] ([Ch][Ala]) were stirred and heated to dissolve at 100°C for 0.5 h to obtain a uniform solution.

[0041] S2. Apply the above solution to the wall of the hollow tube of the heated cigarette holder rod, with a coating thickness of 0.5 mm.

[0042] S3, waiting for the solution to cool and solidify into a gel to obtain a temperature-reducing and harm-reducing material.

[0043] S4. The above-mentioned materials are placed in a heated cigarette to prepare a heated cigarette containing the cooling and harm-reducing materials.

[0044] Example 3

[0045] This embodiment provides a method for preparing a temperature-reducing and harm-reducing material and a heated cigarette.

[0046] S1. Dissolve 10 wt % pectin and ionic liquid [choline][lysine] ([Ch][Lys]) by stirring and heating at 100° C. for 1 h to obtain a uniform solution.

[0047] S2. Apply the above solution onto acetate fiber nonwoven fabric with a coating thickness of 1.0 mm.

[0048] S3, waiting for the solution to cool and solidify into a gel to obtain a temperature-reducing and harm-reducing material.

[0049] S4. Curling the above-mentioned material and placing it in the hollow filter section of the heated cigarette mouthpiece to prepare a heated cigarette containing the cooling and harm-reducing material.

[0050] Test example

[0051] Under the same conditions, the heated cigarettes (reference) not containing cooling and harm reduction materials and the heated cigarettes containing cooling and harm reduction materials in Examples 1 to 3 were respectively scored by 10 relevant smoking experts according to the cigarette sensory evaluation method for the sensory quality (comfort) of smoking, and the average score was taken. The smoke temperature of the cigarette was measured using the NHI600 cigarette adaptability experimental device. The smoke of the heated cigarette was collected on the Cambridge filter using a linear smoking machine. The collection procedure of the smoking machine was: bell-shaped smoking curve, smoking capacity 55mL, smoking time 2s, smoking interval 30s, number of puffs 8, number of triggers 3 times, trigger time 0.2s, trigger interval 0.2s; the total content of acrolein and 3-chloro-1,2-propanediol in the above-mentioned smoking smoke was determined by gas chromatography-mass spectrometry; the total water content in the above-mentioned smoking smoke was determined by gas chromatography. The test results are shown in Table 1.

[0052] Table 1 Test results of heated cigarettes of Examples 1 to 3 and reference products

[0053]

[0054] Note: In Table 1, comfort is scored from 0 to 10, from extremely uncomfortable to very comfortable.

[0055] As can be seen from Table 1, after adding the material prepared by the present invention, the smoke temperature of the heated cigarette is significantly reduced. During the inhalation process, the cooling material undergoes a partial phase change and absorbs part of the heat of the smoke, but no liquid leakage occurs. Compared with the control group, the water content of the smoke in the embodiment is reduced, and the smoke state becomes dry, indicating that the material of the present invention will absorb part of the moisture in the smoke and reduce the hot feeling of the smoke, and there is no obvious impurity in the smoke, indicating that the material of the present invention will not have a negative impact on the sensory quality of the heated cigarette. The content of acrolein and 3-chloro-1,2-propanediol in the embodiment is less than that of the control sample to which the cooling material is not added, indicating that the material can effectively absorb harmful substances in the smoke of heated cigarettes.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a cooling and harm-reducing material for heated cigarettes, characterized in that: The steps include: The natural polymer material and the choline ionic liquid are heated and dissolved to form a uniform solution; the mass fraction of the natural polymer material is 3 to 15 wt%; The solution is coated onto the inner substrate of the heated cigarette while it is hot, and then cooled to room temperature to obtain the temperature-reducing and harm-reducing material for the heated cigarette.

2. The preparation method according to claim 1, characterized in that The gel transition point of the temperature-reducing and harm-reducing material for heated cigarettes is 50-70°C.

3. The preparation method according to claim 2, characterized in that: The cation of the choline ionic liquid is a choline cation, and the anion of the choline ionic liquid includes one or more of lysine, glycine, alanine, phenylalanine, and threonine.

4. The preparation method according to claim 1, characterized in that: The natural polymer includes one or more of agarose, gelatin, chitosan or pectin.

5. The preparation method according to claim 1, characterized in that: The internal substrate of the heated cigarette includes the inner cavity of the filter rod, the filter tip bundle or the cooling element.

6. The preparation method according to claim 5, characterized in that: The cooling element comprises one or more of metal foil, polymer film, paper, non-woven fabric, aerogel or porous material.

7. The preparation method according to claim 1, characterized in that: The temperature for heating and dissolving is 80-120° C., and the time for heating and dissolving is 0.5-2 h.

8. The preparation method according to claim 1, characterized in that: The coating has a thickness of 0.2 to 1 mm.

9. The temperature-reducing and harm-reducing material for heated cigarettes prepared by the preparation method according to any one of claims 1 to 8.

10. A heated cigarette, characterized in that: Including the temperature-reducing and harm-reducing material for heated cigarettes as described in claim 9.

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