CN111820446B - Mint-type sustained-release material, tobacco stick, heat-not-burn tobacco product with bean-scented aroma, and preparation and application thereof - Google Patents

Abstract

The invention belongs to the technical field of cigarettes which are not burnt by heating, and particularly provides a mint type cigarette slow-release material which has bean fragrance and is not burnt by heating. The invention also discloses a preparation method of the slow-release material and application of the slow-release material in heating non-burning cigarettes. Moreover, the invention also provides a tobacco rod containing the slow-release material and a heating non-burning cigarette connected with the tobacco rod. The slow release material prepared by the invention can effectively and uniformly release the composite aroma of mint and bean fragrance in the heating process of heating the non-burning tobacco products, increase the aroma quantity of cigarettes, reduce the irritation and endow the mint type cigarettes with obvious bean fragrance.

Description

A mint-type sustained-release material, tobacco stick, and heat-not-burn cigarette with bean-flavored aroma Grass products and their preparation and application

technical field

The invention relates to a method for slow-release of mint and bean aroma components in heat-not-burn tobacco products and an application thereof, and belongs to the technical field of slow-release aroma of novel tobacco products.

Background technique

In the field of new tobacco products, heat-not-burn tobacco products achieve the purpose of low harm by controlling the temperature of the internal tobacco material to keep them in a non-burning state. Their taste is the closest to traditional cigarettes, and their appearance and consumption methods are also similar to traditional cigarettes. To a certain extent, it can not only give users a sensory experience similar to traditional cigarettes, but also greatly reduce the harm of smoking traditional cigarettes. Therefore, heat-not-burn tobacco products have become a hot spot with the most development potential in the industry.

Compared with traditional cigarettes, due to the changed heating mode and smoking method, the tobacco part of heat-not-burn cigarettes is always in a heated state during the smoking process, and the release of aroma substances, especially the release of highly volatile added aroma substances, is difficult to maintain. Uniform, it is difficult to ensure its quality stability and the realization of product taste style. Therefore, the highly volatile external flavor sustained-release technology is one of the key basic technologies to endow heat-not-burn tobacco products with better sensory quality and stable style characteristics.

The tobacco part of the heat-not-burn cigarette will inevitably lose part of the tobacco endogenous flavor during the processing, and due to the low heating temperature (200 ~ 350 ℃), there is an obvious shortage of aroma substances during smoking, and there are woody, spicy and other miscellaneous gases. The problem is that the organoleptic quality of the tobacco part needs to be improved by adding a certain amount of tobacco extract or exogenous flavor. Mint flavors such as menthol and menthone can reduce acrid air, improve aftertaste, and reduce tongue residue during the suction process; lactone flavors such as dihydrocoumarin and gamma-caprolactone have Appropriate caramel sweet bean fragrance can enrich the aroma, harmonize and reduce miscellaneous air, reduce irritation, and enhance aftertaste comfort. However, if the flavor monomers such as menthol and menthone are directly used for flavoring the tobacco part of heat-not-burn cigarettes, they will not only be highly volatile and lost in the drying process and the subsequent storage stage, but also have the problem that the aroma is not lasting; During the heating process of burning cigarettes, it is easy to be released in the first puff and the second puff, which makes the taste before and after smoking a big difference, resulting in an uncomfortable sensory experience.

SUMMARY OF THE INVENTION

In view of the problems existing in the above-mentioned prior art, the present invention provides a mint-type sustained-release material (also referred to as sustained-release material for short) that can be used in heat-not-burn tobacco products with a bean aroma, aiming to provide a new The slow-release material with bean aroma and mint coolness.

The second object of the present invention is to provide a method for preparing the mint-type sustained-release material with bean fragrance.

The third object of the present invention is to provide an application of the mint-type sustained-release material with bean fragrance.

The fourth object of the present invention is to provide a tobacco rod with the function of slow release of bean fragrance and mint cooling feeling simultaneously, and the prepared heat-not-burn cigarette.

A menthol-type heat-not-burn smoke sustained-release material with bean fragrance, comprising a polymer base material and a perfuming material dispersed in the polymer base material, wherein the perfuming material comprises mint flavors, lactones Spices and Organic Acids.

Heat not burn tobacco products are different from ordinary burning cigarettes in that they have different mechanisms and different requirements for materials. The purpose of the present invention is to provide a sustained-release material suitable for heat-not-burn smoke. The sustained-release material of the present invention includes a polymer and a perfuming material directly dispersed in the polymer system, and the perfuming material includes mint flavor, lactone flavor and organic acid. The present invention utilizes the interaction between the components of the ternary perfuming material and the interaction between the perfuming material and the polymer, so that on the basis of mixing and perfuming heat-not-burn cigarettes, it also imparts a good slow-release effect to the aroma, which can effectively improve the The uniformity of aroma before and after smoking significantly improves the taste before and after smoking.

In the present invention, the composition ratio of the aromatizing material and its structural properties directly dispersed in the polymer matrix are the keys to endow the sustained-release material with multiple aromas and a sustained-release function in heat-not-burn smoke. Not only that, the inventors have also unexpectedly discovered that, by pre-mixing the flavoring material and then dispersing it in the polymer base, the effect of slow-release aroma of the material in heat-not-burn smoke can be unexpectedly further improved.

Preferably, the perfuming material is a material premixed with raw materials including mint flavors, lactone flavors and organic acids, and the premixing time is not less than 48h (time); further preferably, premixing The time is not less than 240h; more preferably 240-1440h; most preferably 240-720h. It is preferred that the sustained-release material under the pre-mixing time has better sustained-release performance and better suction taste.

Preferably, the premixing process is carried out at room temperature.

The mint flavors of the present invention include at least one of menthol, isopulegol, menthone, menthyl acetate, menthyl lactate, menthyl isovalerate, peppermint oil, peppermint oil, and menthol glycosides. A sort of.

The lactone fragrances of the present invention include gamma-valerolactone, gamma-caprolactone, gamma-undecalactone, butyl-caprolactone, butyl-caprylactone, butyl-nononolactone, butyl-decalactone At least one of ester, butyl laurolactone, coumarin, dihydrocoumarin, octahydrocoumarin, 6-methyl coumarin and 7-methyl coumarin.

The organic acid of the present invention is preferably a carboxylic acid, and further preferably includes at least one of lactic acid, tartaric acid, acetic acid, isovaleric acid, malic acid, citric acid and the like.

The study also found that further control of the proportion of components will help to further improve the synergy between the components, and help to further improve the sustained release effect of the material in heat-not-burn smoke.

Preferably, in the perfuming material, mint flavors, lactone flavors, and organic acids are mixed in a mass ratio of 30-60:20-50:0.1-5.

Preferably, described a kind of perfuming material (mixed spice) ①, is composed of raw materials by weight percentage: menthol 40%, menthone 8%, dihydrocoumarin 20%, gamma caprolactone 6%, gamma-undecalactone 10%, butyl-caprolactone 14%, citric acid 2%.

Preferably, described a kind of perfuming material ②, is composed of raw materials by weight percentage: menthol 40%, menthyl acetate 20%, octahydrocoumarin 20%, gamma caprolactone 13%, gamma 10% Monolactone 5%, citric acid 2%.

Preferably, the described a kind of perfuming material ③, is composed of raw materials by weight percentage: menthol 30%, menthone 4%, menthyl acetate 10%, dihydrocoumarin 20%, octahydrocoumarin 15% %, gamma caprolactone 20%, citric acid 1%.

Preferably, the molecular weight of the polymer substrate is 1 to 1.5 million.

Preferably, the polymer substrate comprises at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methylcellulose, hydroxypropylcellulose, ethylcellulose, and hydroxypropylmethylcellulose kind.

Preferably, the sustained-release material of the present invention is preferably a sheet or film material comprising the above-mentioned mixed fragrance and a polymer substrate.

Preferably, the sustained-release material is a single-layer structure comprising the above-mentioned mixed fragrance and polymer base material; or a multi-layer composite structure formed by compounding a polymer A layer on the surface of the single-layer structure; Preferably, the perfuming material is not added to the polymer A layer.

The molecular weight of the polymer A is 1 to 1.5 million; preferably polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methyl cellulose, hydroxypropyl cellulose, ethyl cellulose, hydroxypropyl cellulose At least one of methyl cellulose; further preferably the same polymer as the polymer substrate.

Preferably, in the heat-not-burn smoke sustained-release material, the percentage content of flavoring raw materials is 0.001%-80%; preferably 10%-80%; more preferably 20%-60%.

The present invention also provides a method for preparing the heat-not-burn smoke sustained-release material, wherein the polymer base material is dissolved in a solvent, then the aromatizing material is added, and the film is formed after mixing to obtain the heat-not-burn smoke slow-release material. Non-burning smoke sustained release material.

The preparation method of the present invention is simple, and the aromatizing materials of the components are directly dispersed in the polymer base material, and the aroma sustained-release material suitable for heat-not-burn cigarettes can be successfully prepared.

In the preferred preparation method of the present invention, mint flavors, lactone flavors and organic acids are pre-mixed, then added to the polymer substrate solution, and the solvent is removed after coating to obtain the heat-not-burn smoke sustained-release material.

Preferably, the premixing time is greater than or equal to 48h, more preferably greater than or equal to 240h; still more preferably 240-1440h.

The solvent is preferably a solvent that can dissolve the polymer.

The solvent of the present invention is any solvent that can dissolve the polymer substrate and the mixed fragrance, preferably at least one of water, ethanol, propylene glycol, and ethyl acetate; more preferably, an alcohol-water mixed solution, the The alcohols are ethanol and/or propylene glycol.

The amount of the solvent may be such that the homogeneous solution is convenient for coating. Preferably, the weight ratio of the polymer substrate to the solvent is 1:1-1:20, and the preferred weight ratio is 1:5-1:10.

In the present invention, the method for removing the solvent may be volatilization at room temperature, hot air drying at 30-50° C., evaporation at low temperature or freeze drying.

In a preferred preparation method of the present invention, a solution of polymer A is coated on the surface of the sustained-release material, dried, and a layer of polymer A is coated on the surface of the sustained-release material.

The preferred preparation method specifically includes the following steps:

1) Weigh 30%-60% of mint flavors, 20%-50% of lactone flavors, and 0.1%-5% of organic acids according to weight percentage, and stir appropriately;

2) The uniformly mixed mixture obtained in step 1) is placed in an airtight container, and after standing for a period of time, a mixed solution is obtained.

3) Dissolving the polymer base material and the mixed solution obtained in step 2) in a certain proportion with a solvent to obtain a homogeneous solution, and removing the solvent after coating to obtain the mint-type slow-release material with bean fragrance.

Preferably, the premixing time (mixing and placing) is greater than or equal to 240h.

The present invention also provides an application of the sustained-release material for preparing heat-not-burn tobacco products.

Preferred applications are tobacco rods for making heat not burn tobacco products.

In a further preferred application, it is blended with tobacco raw materials for making tobacco rods for non-burning tobacco products.

In order to be suitable for application, the mint-type sustained-release material with bean flavor can be cut or rolled into various shapes for application in heat-not-burn tobacco products, including but not limited to filament, sheet, granule, drum shape.

The present invention provides a tobacco rod of a mint-type heat-not-burn tobacco product with a sustained-release bean aroma, comprising the sustained-release material of the present invention.

The preferred tobacco rod of the present invention is a unit tobacco rod formed by compounding a filamentous or sheet-shaped sustained-release material and shredded tobacco.

The preferred tobacco rod of the present invention is a unit tobacco rod formed by rolling a slow-release material of a certain shape into a cylindrical shape and compounding it in a hollow cooling section.

The present invention also provides a heat-not-burn tobacco product capable of simultaneously and uniformly releasing the compound aroma of mint and bean, comprising the tobacco rod of the present invention.

In the present invention, a polymer is used as a base material (carrier), and the mixed solution of the above-mentioned ternary raw materials of mint flavors, lactone flavors and organic acids is embedded, dispersed and embedded in the base material. When used in heat-not-burn tobacco products, it can overcome the technical problems of excessively strong first aroma, basically volatilized second aroma, and difficulty in giving products stable quality and style characteristics, which exist in direct aromatization of heat-not-burn tobacco products; Greatly reduces irritation and enhances aftertaste comfort. When heated and sucked, the heating temperature makes the polymer substrate slowly release aroma components, so that consumers can feel a uniform, soft and stable aroma.

The beneficial effects of the present invention are:

1. The present invention utilizes the perfuming material components and the interaction between the perfuming material and the polymer to synergistically endow the material with a good slow-release effect of aroma. The slow-release material prepared by the invention can evenly release the compound aroma of mint and soy in the heating process of the heat-not-burn cigarette, increases the aroma amount of the cigarette, reduces irritation and miscellaneous air, and imparts a more obvious smell to the menthol type cigarette. The bean-flavored aroma improves the satisfaction and comfort of cigarette smoking, and has good aroma consistency before and after smoking, and has a good application prospect.

2. The present invention unexpectedly found that pre-mixing the aromatizing materials of the components and then dispersing them in the polymer can unexpectedly enhance the slow-release effect of the aroma of the material and improve the suction taste.

3. In the present invention, the surface of the sustained-release material is coated with a polymer A layer that does not contain a fragrance material, which helps to further enhance the sustained-release effect of the aroma.

Description of drawings

Fig. 1 is the TG figure of 1. perfuming material prepared in menthol, embodiment 1 and 1. slow-release material;

Fig. 2 is the TG diagram of the slow-release material prepared in Example 1 ① under the constant temperature condition of 200 ℃;

Fig. 3 is a schematic diagram of six index evaluation scores of control group D;

Fig. 4 is a schematic diagram of six index evaluation scores of experimental group A;

Fig. 5 is a schematic diagram of six index evaluation scores of experimental group B;

FIG. 6 is a schematic diagram of the six-item evaluation score of the experimental group C.

Detailed ways

The following examples are intended to illustrate the present invention without further limiting it.

Example 1

Weigh 3 g of hydroxypropyl methylcellulose (substrate, food grade), and add about 30 mL of a mixed solvent of ethanol and water to completely dissolve the hydroxypropyl methylcellulose. Then add 2 g of the above-mentioned perfuming material ① that has been premixed for 30 days, and stir thoroughly to make it evenly dispersed in the base material solution. The above-mentioned liquid was coated on a flat plate, and the solvent was fully removed by the method of volatilization at room temperature to obtain about 5 g of a mint-type slow-release material with a bean-flavored aroma and a circular shape with a diameter of 20 cm and a thickness of 0.75 mm.

Cut the above-mentioned slow-release material ① into a filament with a length of about 20 mm, and mix it into the tobacco material of the heat-not-burn tobacco product in the shape of a thin cigarette at a ratio of 5%, that is, the tobacco of the heat-not-burn cigarette is obtained. Great.

In order to characterize the release effect of the prepared sustained-release material ① as a function of temperature, in this case, the pure menthol sample, the above-mentioned pre-mixed perfuming material ① and the prepared mint-type sustained-release material ① were respectively heated. Reanalysis test. As shown in Figure 1, pure menthol begins to vaporize after being heated, and the vaporization rate is very fast. When the temperature reaches about 140 °C, menthol has been completely vaporized. The premixed perfuming material ① starts to volatilize at about 110°C, and the weight loss rate gradually increases as the temperature increases. When the temperature reaches about 250°C, the perfuming material ① is completely vaporized. The TG curve of the sustained-release material ① after adding the polymer substrate can be clearly seen in the figure, the weight loss between 100 ℃ and 300 ℃ is relatively slow, and the weight loss rate is obviously smaller than that of the perfuming material ①, indicating that the sustained-release material is ①In the temperature range below 300°C, the volatilization is carried out in a continuous, slow, uniform and stable manner, and the weight loss rate at 300°C is about 30%.

We also further analyzed the TG curve of the sustained-release material ① at a constant temperature of 200 °C. As shown in Figure 2, the sustained-release composite film was rapidly heated to 200 °C within 2 minutes and began to be in a constant temperature state, and the sustained-release composite film showed a slow and uniform weight loss trend. , the weight loss rate is about 22% within 10 minutes, and the time for continuous weight loss to release fragrance is more than 30 minutes. From this, it can be further judged that the sustained-release material ① has a good fragrance sustained-release effect.

Example 2

Weigh 2.5 g of methylcellulose (substrate, food grade), and add about 30 mL of a mixed solvent of ethanol and water to completely dissolve the methylcellulose. Then add 2.5 g of the above-mentioned perfuming material ② that has been premixed for 10 days, and stir well to make it evenly dispersed in the base material solution. The above-mentioned liquid was coated on a flat plate, and the solvent was fully removed by the method of hot air drying at 40° C. to obtain about 5 g of a round mint-type slow-release material with a bean-flavored aroma with a diameter of 20 cm and a thickness of 0.75 mm.

Cut the above-mentioned slow-release material ② into a filament with a length of about 20 mm, and blend it into the tobacco material of the heat-not-burn tobacco product in the shape of a thin cigarette at a ratio of 3%, that is, the tobacco of the heat-not-burn cigarette is obtained. Great.

Example 3

Weigh 3.4 g of polyvinyl alcohol (pharmaceutical grade, type 1788), and add about 20 mL of water to completely dissolve the polyvinyl alcohol. Then add 2 g of the above-mentioned perfuming material ③ after premixing for 60 days, and stir well to make it evenly dispersed in the base material solution. The above-mentioned liquid was coated on a flat plate, and the solvent was fully removed by the method of hot air drying at 40° C. to obtain about 5.4 g of a round mint-type slow-release material with a bean-like aroma with a diameter of 20 cm and a thickness of 0.8 mm.

Cut the above-mentioned slow-release material ③ into a rectangle with a length of about 10 mm and a width of about 5 mm, and roll it into a cylindrical shape and compound it at the front end of the hollow cooling section of the tobacco rod, to obtain a tobacco rod of heat-not-burn cigarette.

Example 4

Compared with Example 1, the surface of the prepared sustained-release material ① is coated with a hydroxypropyl methylcellulose solution that does not contain perfuming materials, and the solvent is fully removed by volatilizing at room temperature again to obtain a diameter of about 7g. It is a mint-type double-layer composite slow-release material with a bean fragrance of 20cm and a thickness of 1.2mm.

The mint-type double-layer composite sustained-release material prepared above is cut into filaments with a length of about 20 mm, and blended into the tobacco material of the heat-not-burn tobacco product in the shape of a thin cigarette at a ratio of 7%, that is, the heat-not-burn tobacco product is prepared. Tobacco sticks for burning cigarettes.

A smoking evaluation test was performed on the heat-not-burn tobacco product prepared in the above Example 4, while the non-burning tobacco product prepared in Example 1 was compared. The results show that the heat-not-burn tobacco products with the double-layer composite structure have better cooling sensation persistence and puff-to-puff uniformity.

Experimental example 1

Experimental objects: The tobacco rods of the heat-not-burn cigarettes prepared in Examples 1 to 3 are listed as experimental group A, experimental group B, and experimental group C, respectively. Choose ordinary heat-not-burn cigarettes (alcohol and original flavor) as control group D, and the number of cigarettes in each group is 10.

Experiment purpose: To evaluate the six indicators of smoke volume, aroma, energy, harmony, irritation and taste of heat-not-burn cigarettes in each group, and obtain the sensory evaluation record form after evaluation.

Experimental method: each group of heat-not-burn cigarettes was distributed to the judges of the company's company smoking evaluation committee, and the smoking evaluation methods known in the industry were used to evaluate the smoking. The sensory descriptions after the inhalation evaluation were recorded, as shown in Table 1.

Table 1 Sensory evaluation record of heat-not-burn cigarettes in each group

The indicators were compared horizontally, and the six indicators of the smoke volume, aroma, energy, harmony, irritation and taste of the heat-not-burn cigarettes in each group were carried out according to the standard of full score of 5, 30, 10, 15, 15 and 25 respectively. Evaluate the absorption and score, record the single index scores of the samples in each group, and obtain the following schematic diagrams of the six index absorption scores of the control group and the experimental group, as shown in Figures 3-6.

It can be seen from the data of the above experimental results that the heat-not-burn cigarettes of the mint-type slow-release sheet with the added bean fragrance aroma can make consumers feel the compound aroma of the cool feeling of peppermint and the bean fragrance evenly during the smoking process, and make the aroma style. It is well reflected, and the sense of satisfaction and comfort of the smoke has been improved. Compared with the direct addition of tobacco flavors, the heat-not-burn cigarettes added with the slow-release sheet have the continuity of the menthol coolness and the uniformity of puff-by-puff release. Better, the richness of the aroma feels better.

Claims (23)

1. a mint-type heat-not-burn smoke sustained-release material with bean aroma, is characterized in that, comprises a polymer base material and the perfuming material dispersed in the polymer base material; The heat-not-burn smoke sustained-release material is a sheet or film material; The perfuming material is a material premixed with raw materials including mint flavor, lactone flavor and organic acid, and the premixing time is not less than 48 h; Peppermint flavors include at least one of menthol, isopulegol, menthone, menthyl acetate, menthyl lactate, menthyl isovalerate, peppermint oil, peppermint oil, and menthol glycosides; Lactone flavors include gamma valerolactone, gamma caprolactone, gamma undecalactone, butyl caprolactone, butyl caprylactone, butyl nonanolactone, butyl decanolide, butyl decanolide At least one of lactone, coumarin, dihydrocoumarin, octahydrocoumarin, 6-methylcoumarin, and 7-methylcoumarin; The organic acid includes at least one of lactic acid, tartaric acid, acetic acid, isovaleric acid, malic acid, and citric acid; In the flavoring materials, mint flavors, lactone flavors, and organic acids are mixed in a mass ratio of 30-60: 20-50: 0.1-5; The polymer substrate includes at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methylcellulose, hydroxypropylcellulose, ethylcellulose, and hydroxypropylmethylcellulose. 2 . The heat-not-burn smoke sustained-release material according to claim 1 , wherein the premixing time is not less than 240 h. 3 . 3. The heat-not-burn smoke sustained-release material according to claim 1, wherein the premixing process is performed at room temperature. 4. The heat-not-burn smoke sustained-release material according to claim 1, characterized in that, in the flavoring material, mint flavors, lactone flavors, and organic acids are in a mass ratio of 30-60: 20-50: 0.1- 5 Mix. 5. The heat-not-burn smoke sustained-release material as claimed in claim 1, wherein the perfuming material comprises menthol 40%, menthone 8%, dihydrocoumarin 20%, gamma caprolactone 6% %, gamma-undecalactone 10%, butyl-caprolactone 14% and citric acid 2%; Alternatively, including menthol 40%, menthyl acetate 20%, octahydrocoumarin 20%, gamma-caprolactone 13%, gamma-undecalactone 5% and citric acid 2%; Alternatively, include menthol 30%, menthone 4%, menthyl acetate 10%, dihydrocoumarin 20%, octahydrocoumarin 15%, gamma caprolactone 20%, and citric acid 1%. 6 . The heat-not-burn smoke sustained-release material according to claim 1 , wherein the percentage content of the flavoring raw material is 0.001% to 80%. 7 . 7 . The heat-not-burn smoke sustained-release material according to claim 1 , wherein the molecular weight of the polymer substrate is 1 to 1.5 million. 8 . 8. The heat-not-burn smoke sustained-release material according to any one of claims 1 to 7, wherein the surface of the heat-not-burn smoke sustained-release material is also compounded with a polymer A layer, and the polymerized The perfuming material is not added to the substance A layer. 9 . The heat-not-burn smoke sustained-release material according to claim 8 , wherein the molecular weight of the polymer A is 1 to 1.5 million. 10 . 10. The heat-not-burn smoke sustained-release material according to claim 9, wherein the polymer A comprises polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methylcellulose, hydroxypropylcellulose , at least one of ethyl cellulose and hydroxypropyl methyl cellulose. 11. A preparation method of the heat-not-burn smoke sustained-release material according to any one of claims 1 to 10, wherein the polymer base material is dissolved in a solvent, and the perfuming material is added subsequently, and after mixing A film is formed to obtain the heat-not-burn smoke sustained-release material. 12. The preparation method of heat-not-burn smoke sustained-release material as claimed in claim 11, characterized in that, mint flavor, lactone flavor and organic acid are premixed, then added to the polymer substrate solution, and coated The solvent is removed after the cloth to obtain the heat-not-burn smoke sustained-release material. 13. The preparation method according to claim 12, wherein the premixing time is greater than or equal to 240 h. 14. The preparation method of claim 13, wherein the solvent comprises at least one of water, ethanol, propylene glycol, and ethyl acetate. 15 . The preparation method according to claim 14 , wherein the mass ratio of the polymer substrate to the solvent is 1:1 to 1:20. 16 . 16. The preparation method according to any one of claims 11 to 15, wherein the solution of polymer A is re-coated on the surface of the slow-release material, dried, and polymerized by coating on the surface of the slow-release material Layer A. 17. A slow-release material according to any one of claims 1 to 10, or an application of the slow-release material obtained by any one of the preparation methods of claims 11 to 16, characterized in that it is used for making heat-not-burning tobacco products. 18. Use according to claim 17, for making tobacco rods for heat not burn tobacco products. 19. The use of claim 18, wherein the sustained release material is mixed with the tobacco raw material for making a tobacco rod of a non-burning tobacco product. 20. A tobacco rod of a mint-type heat-not-burn tobacco product with slow-release bean aroma, characterized in that it comprises the slow-release material described in any one of claims 1 to 10, or any of claims 11 to 16. A sustained-release material prepared by a preparation method. 21. The tobacco rod for heat-not-burn tobacco products according to claim 20, characterized in that it is a unit tobacco rod formed by compounding a filament-shaped or sheet-shaped sustained-release material and shredded tobacco. 22. The tobacco rod for heat-not-burn tobacco products according to claim 21, characterized in that a unit tobacco rod formed by rolling a certain shape of sustained-release material into a cylindrical shape and compounding it in a hollow cooling section. 23. A mint-type heat-not-burn tobacco product with sustained-release bean aroma, characterized in that it comprises the tobacco rod according to any one of claims 20 to 22.

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