CN111820446A

CN111820446A - Mint type slow-release material with bean fragrance, tobacco stick, heating non-combustible tobacco product and preparation and application thereof

Info

Publication number: CN111820446A
Application number: CN201910299489.XA
Authority: CN
Inventors: 丁莎; 陈雄; 崔雨琪; 苏利霞; 邓昌健; 杜欢哲; 李燕春; 杨华武; 刘金云; 谭新良; 刘建福
Original assignee: China Tobacco Hunan Industrial Co Ltd
Current assignee: China Tobacco Hunan Industrial Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-10-27
Anticipated expiration: 2039-04-15
Also published as: CN111820446B

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

Mint type slow-release material with bean fragrance, tobacco stick, heating non-combustible tobacco product and preparation and application thereof

Technical Field

The invention relates to a method for slowly releasing mint and bean fragrance components in a heating non-combustible tobacco product and application thereof, belonging to the technical field of novel tobacco product fragrance slow release.

Background

In the field of novel tobacco products, the tobacco products which are not burnt after being heated are in a non-burning state through controlling the temperature of the internal tobacco materials so as to achieve the purpose of low harm, the taste of the tobacco products is closest to that of the traditional cigarettes, the appearance and the consumption mode of the tobacco products are similar to that of the traditional cigarettes, the sensory experience similar to that of the traditional cigarettes can be given to users to a certain extent, the harmfulness of smoking the traditional cigarettes can be greatly reduced, and therefore, the tobacco products which are not burnt after being heated become the hot spots with the most development potential in the industry.

Compared with the traditional cigarette, the heating mode and the smoking mode are changed, the whole tobacco part of the cigarette which is not heated and combusted is always in a heating state in the smoking process, the release of the flavor substances, particularly the release of the additional flavor substances with strong volatility is difficult to keep uniform, and the quality stability and the product taste and style are difficult to ensure. Therefore, the external flavor slow-release technology with strong volatility is one of the key basic technologies for endowing the heated non-burning tobacco products with better sensory quality and stable style characteristics.

The tobacco part of the cigarette which is not combusted by heating inevitably loses part of tobacco endogenous spices in the processing process, and because the heating temperature is low (200-350 ℃), fragrant substances are obviously insufficient during smoking, and the problem of miscellaneous gases such as wood and spicy flavor is caused, and the sensory quality of the tobacco part is improved by adding a certain amount of tobacco extract or exogenous spices. The mint spices such as menthol and menthone can play a role in reducing pungent and miscellaneous gases, improving aftertaste and relieving tongue surface residue in the smoking process; the lactone spices such as dihydrocoumarin and propyl caprolactone have proper burnt sweet bean fragrance, can enrich fragrance, coordinate and reduce miscellaneous gas, reduce irritation, and enhance aftertaste and comfort. However, if the perfume monomers such as menthol and menthone are directly used for perfuming the tobacco part of the non-combustible cigarette, the perfume monomers are extremely volatile and lost in the drying process and the subsequent storage stage, and the problem of non-lasting fragrance exists; and the cigarette is easy to be released completely at the first mouth and the second mouth in the heating process of heating the non-burning cigarette, so that the difference before and after the taste is sucked is large, and uncomfortable sensory experience is caused.

Disclosure of Invention

In view of the problems in the prior art, the invention provides a mint type slow release material (also referred to as slow release material for short) with bean fragrance note in a non-combustible heating tobacco product, and aims to provide a brand-new slow release material with bean fragrance note and mint cool feeling.

The second purpose of the invention is to provide a preparation method of the mint type slow-release material with the bean fragrance note.

The third purpose of the invention is to provide the application of the mint type slow-release material with the bean fragrance note.

The fourth purpose of the invention is to provide a tobacco rod with bean fragrance and mint cool feeling and a function of slowly releasing the bean fragrance and the mint cool feeling and the prepared heating non-combustible cigarette.

A mint type heating non-combustion smoke slow release material with a bean fragrance note comprises a polymer base material and a flavoring material dispersed in the polymer base material, wherein the flavoring material comprises mint flavors, lactone flavors and organic acid.

The heating non-combustible tobacco products are different from common combustion type cigarettes, and have different mechanisms and different requirements on materials. The invention aims to provide a slow-release material suitable for heating non-combustible smoke. The slow release material comprises a polymer and a flavoring material directly dispersed in the polymer system, wherein the flavoring material comprises a mint type spice, a lactone type spice and an organic acid. According to the invention, by utilizing the interaction of the components of the ternary flavoring material and the interaction between the flavoring material and the polymer, the fragrance is endowed with a good slow release effect on the basis of realizing the mixed flavoring of heating non-combustible burning cigarettes, the uniformity of the fragrance before and after smoking can be effectively improved, and the taste before and after smoking is obviously improved.

In the invention, the proportion of the flavoring material components and the structural characteristic that the flavoring material components are directly dispersed in the polymer matrix are the key points of endowing the slow-release material with multiple aromas in the non-combustible heating smoke and having the slow-release function. Moreover, the research of the inventor also unexpectedly finds that the fragrance slow-release effect of the material in the non-combustible cigarette heated can be further improved unexpectedly by premixing the flavoring material and then dispersing the flavoring material in the polymer substrate.

Preferably, the flavoring materials are premixed materials of raw materials comprising mint flavors, lactone flavors and organic acids, and the premixing time is not less than 48 hours; further preferably, the premixing time is not less than 240 h; even more preferably 240 to 1440 h; most preferably 240 to 720 hours. The sustained-release material under the optimal premixing time has better sustained-release performance and better smoking mouthfeel.

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

The mint spice comprises at least one of menthol, isopulegol, menthone, menthyl acetate, menthyl lactate, menthyl isovalerate, peppermint oil and menthol glycoside.

The lactone perfume comprises at least one of propyl valerolactone, propyl caprolactone, propyl undecanolactone, butyl caprolactone, butyl octalactone, butyl nonanolide, butyl decanolide, butyl dodecanolactone, coumarin, dihydrocoumarin, octahydrocoumarin, 6-methylcoumarin and 7-methylcoumarin.

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

Research also finds that further control of the proportion of the ingredients helps to further promote the cooperativity between the components and the slow release effect of the material in the non-combustible smoke after heating.

Preferably, in the flavoring materials, the mint spice, the lactone spice and the organic acid are mixed according to the mass ratio of 30-60: 20-50: 0.1 to 5 parts by weight.

Preferably, the perfuming material (mixed perfume) is prepared from the following raw materials in percentage by weight: 40% of menthol, 8% of menthone, 20% of dihydrocoumarin, 6% of propyl caprolactone, 10% of propyl undecanolactone, 14% of butyl caprolactone and 2% of citric acid.

Preferably, the flavoring material II comprises the following raw materials in percentage by weight: 40% of menthol, 20% of menthyl acetate, 20% of octahydrocoumarin, 13% of propyl caprolactone, 5% of propyl undecanolactone and 2% of citric acid.

Preferably, the flavoring material III is prepared from the following raw materials in percentage by weight: menthol 30%, menthone 4%, menthyl acetate 10%, dihydrocoumarin 20%, octahydrocoumarin 15%, propyl caprolactone 20%, and citric acid 1%.

Preferably, the molecular weight of the polymer base material is 1 to 150 ten thousand.

Preferably, the polymer base material contains at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methylcellulose, hydroxypropylcellulose, ethylcellulose, and hydroxypropylmethylcellulose.

Preferably, the sustained-release material of the present invention is preferably a sheet or film material comprising the above-mentioned perfume mixture and a polymer base material.

Preferably, the slow release material is a single-layer structure which is compounded with the mixed perfume and the polymer base material; or a multi-layer composite structure formed by compounding a polymer A layer on the surface of the single-layer structure; said perfuming material is preferably not added to said polymer a layer.

The molecular weight of the polymer A is 1-150 ten thousand; preferably at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methylcellulose, hydroxypropyl cellulose, ethyl cellulose and hydroxypropyl methylcellulose; further preferred are the same polymers as the polymer substrate.

Preferably, the slow release material for the cigarette which is not combusted by heating has the percentage content of the flavoring raw material of 0.001-80 percent; preferably 10 to 80 percent; more preferably 20% to 60%.

The invention also provides a preparation method of the heating non-combustible smoke slow-release material, which is characterized in that a polymer base material is dissolved by a solvent, then the flavoring material is added, and the mixture is uniformly mixed to form a film, so that the heating non-combustible smoke slow-release material is prepared.

The preparation method is simple, and the flavoring materials of the components are directly dispersed in the polymer base material, so that the fragrance slow-release material suitable for heating non-combustible smoke can be successfully prepared.

According to the preferable preparation method of the invention, the mint flavor, the lactone flavor and the organic acid are mixed in advance, then the mixture is added into the polymer base material solution, and the solvent is removed after coating, so that the slow release material for the smoke which does not burn when heated is obtained.

Preferably, the premixing time is greater than or equal to 48 hours, and more preferably greater than or equal to 240 hours; more preferably 240 to 1440 hours.

The solvent is preferably a solvent in which the polymer is soluble.

The solvent of the invention is any solvent capable of dissolving the polymer base material and the mixed perfume, and is preferably at least one of water, ethanol, propylene glycol and ethyl acetate; more preferably, the alcohol-water mixed solution is ethanol and/or propylene glycol.

The solvent is used in an amount such that the homogeneous solution is easily applied. Preferably, the weight ratio of the polymer base material to the solvent is 1: 1-1: 20, and the preferred weight ratio is 1: 5-1: 10.

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

According to a preferable preparation method of the invention, the surface of the sustained-release material is coated with the solution of the polymer A again, and the polymer A layer is coated on the surface of the sustained-release material after drying.

The preferable preparation method specifically comprises the following steps:

1) weighing 30-60% of mint spice, 20-50% of lactone spice and 0.1-5% of organic acid according to the weight percentage, and stirring properly;

2) placing the uniformly mixed mixture obtained in the step 1) in a closed container, and standing for a period of time to obtain a mixed solution.

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

Preferably, the premixing time (mixing placement) is greater than or equal to 240 hours.

The invention also provides application of the slow-release material to preparing a tobacco product which is not combusted by heating.

Preferred use is for making a tobacco rod for a heat not burn tobacco product.

A further preferred use is the mixing of tobacco material with it for the manufacture of a tobacco rod for a non-combustible smoking article.

To be suitable for use in an application, the mint-type slow-release material having a bean-note may be cut or rolled into various shapes for application to a heated non-combustible tobacco product, including but not limited to a thread, a sheet, a pellet, a roll.

The invention provides a tobacco rod of a mint type heating non-combustion tobacco product with a slow-release bean fragrance note, which comprises the slow-release material.

The preferred tobacco rod of the invention is a unit tobacco rod formed by compounding filiform or flaky slow-release materials and cut tobacco.

The preferable tobacco rod of the invention is a unit tobacco rod formed by rolling a slow release material with a certain shape into a cylinder shape and compounding the cylinder shape in a hollow cooling section.

The invention also provides a heating non-combustible tobacco product capable of simultaneously and uniformly releasing the compound aroma of mint and bean fragrance, which comprises the tobacco rod.

According to the invention, a polymer is used as a base material (carrier) and the mixed solution of the three raw materials of the mint-type spice, the lactone-type spice and the organic acid is embedded, dispersed and embedded in the base material, and the material is applied to a heating non-combustible tobacco product, so that the technical problems that the first taste of the tobacco product is too strong, the second taste of the tobacco product is basically volatilized and completely, stable quality and style characteristics of the product are difficult to endow and the like in the direct perfuming of the heating non-combustible tobacco product can be solved; can greatly reduce the irritation and enhance the aftertaste and comfort. When the smoking is heated, the heating temperature enables the polymer substrate to slowly release the aroma components, so that consumers can feel uniform, soft and stable aroma.

The invention has the beneficial effects that:

1. the invention utilizes the interaction between the flavoring material components and the flavoring material and the polymer to cooperatively endow the material with good fragrance slow-release effect. The slow release material prepared by the invention can uniformly release the composite aroma of mint and bean aroma in the heating process of heating the non-burning cigarettes, increases the aroma amount of the cigarettes, reduces irritation and miscellaneous gases, gives the mint type cigarettes a more obvious bean aroma, improves the satisfaction and comfort of smoking the cigarettes, has better consistency of aroma before and after smoking, and has good application prospect.

2. The invention has surprisingly found that the fragrance slow-release effect of the material can be unexpectedly improved and the smoking mouthfeel can be improved by premixing the flavoring materials of the components and then dispersing the flavoring materials in the polymer.

3. The surface of the slow-release material is coated with the polymer A layer without flavoring materials, which is favorable for further improving the slow-release effect of the fragrance.

Drawings

FIG. 1 is a TG diagram of menthol, a perfuming material (i) and a sustained-release material (i) prepared in example 1;

FIG. 2 is a TG diagram of the sustained-release material (i) prepared in example 1 at a constant temperature of 200 ℃;

FIG. 3 is a graph showing the six-index panel scores of control group D;

FIG. 4 is a graph showing the six-index panel score of the experimental group A;

FIG. 5 is a graph showing the six-index panel scores of test group B;

FIG. 6 is a graph showing the six index panel scores of test group C.

Detailed Description

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

Example 1

3g of hydroxypropylmethylcellulose (substrate, food grade) was weighed, and about 30mL of a mixed solvent of ethanol and water was added to completely dissolve the hydroxypropylmethylcellulose. Then adding 2g of the flavoring material I premixed for 30 days, and fully stirring to uniformly disperse the flavoring material I in the base material solution. And (3) coating the liquid on a flat plate, and fully removing the solvent by adopting a room-temperature volatilization method to obtain 5g of round mint type slow-release material (I) with the diameter of 20cm and the thickness of 0.75mm and bean fragrance.

The prepared slow release material is cut into filaments with the length of about 20mm, and the filaments are mixed into tobacco materials of a thin cigarette-shaped heating non-combustion tobacco product according to the proportion of 5 percent, so that the tobacco rod of the heating non-combustion cigarette is prepared.

In order to characterize the release effect of the prepared slow-release material (i) along with the temperature change, thermogravimetric analysis tests are respectively carried out on a pure menthol sample, the premixed flavoring material (i) and the prepared mint type slow-release material (i). As shown in fig. 1, pure menthol starts to vaporize after being heated, and the rate of vaporization is very fast, and menthol is completely vaporized when the temperature reaches around 140 ℃. The premixed perfuming material begins to volatilize from about 110 ℃, the weight loss rate is gradually increased along with the rise of the temperature, and when the temperature reaches about 250 ℃, the perfuming material is completely gasified. The TG curve of the slow release material (i) added with the polymer base material can be obviously seen in the figure, the weight loss is slower between 100 ℃ and 300 ℃, the weight loss rate is obviously smaller than that of the flavoring material (i), the slow release material (i) volatilizes in a continuous, slow, uniform and stable manner in a temperature range below 300 ℃, and the weight loss rate is about 30% at 300 ℃.

We further analyze the TG curve of the sustained-release material under the constant temperature condition of 200 ℃, as shown in figure 2, the temperature is rapidly increased to 200 ℃ within 2min and the sustained-release composite membrane begins to be in the constant temperature state, the sustained-release composite membrane is in the slow and uniform weight loss trend, the weight loss rate is about 22% within 10min, and the time for releasing the fragrance by continuous weight loss reaches more than 30 min. Therefore, the slow release material (I) can be further judged to have good fragrance slow release effect.

Example 2

2.5g of methylcellulose (substrate, food grade) was weighed and about 30mL of a mixed solvent of ethanol and water was added to completely dissolve the methylcellulose. Then 2.5g of the flavoring material (II) premixed for 10 days is added, and the mixture is fully stirred to be uniformly dispersed in the base material solution. Coating the liquid on a flat plate, and fully removing the solvent by adopting a hot air drying method at 40 ℃ to obtain 5g of round mint type slow-release material (II) with the bean fragrance note, the diameter of which is about 20cm and the thickness of which is 0.75 mm.

The prepared slow release material is cut into filaments with the length of about 20mm, and the filaments are mixed into tobacco materials of a thin cigarette-shaped heating non-combustion tobacco product according to the proportion of 3 percent, so that the tobacco rod of the heating non-combustion cigarette is prepared.

Example 3

3.4g of polyvinyl alcohol (pharmaceutical grade, type 1788) was weighed and about 20mL of water was added to completely dissolve the polyvinyl alcohol. Then 2g of the flavoring material (c) premixed for 60 days is added, and the mixture is fully stirred to be uniformly dispersed in the base material solution. Coating the above liquid on a flat plate, and drying with 40 deg.C hot air to remove solvent sufficiently to obtain 5.4g circular herba Menthae type sustained release material with bean fragrance and diameter of 20cm and thickness of 0.8 mm.

Cutting the prepared slow release material into a rectangle with the length of about 10mm and the width of about 5mm, rolling the rectangle into a cylinder shape, and compounding the cylinder shape at the front end of a hollow cooling section of the tobacco rod to obtain the tobacco rod for heating the non-combustible cigarette.

Example 4

Compared with the example 1, the surface of the prepared slow-release material I is coated with the hydroxypropyl methyl cellulose solution without flavoring materials, and the solvent is fully removed by adopting a room-temperature volatilization method again to prepare about 7g of the mint type double-layer composite slow-release material with the bean fragrance note, the diameter of which is about 20cm and the thickness of which is 1.2 mm.

The prepared mint type double-layer composite slow-release material is cut into filaments with the length of about 20mm, and the filaments are mixed with tobacco materials of a thin cigarette-shaped heating non-combustion tobacco product according to the proportion of 7 percent, so that the tobacco rod of the heating non-combustion cigarette is prepared.

The smoking test was performed on the heated non-combustible tobacco product prepared in example 4 above, while comparing the non-combustible tobacco product prepared in example 1. The results show that the tobacco product with the double-layer composite structure and the non-combustion heating has better cool feeling persistence and mouth-to-mouth release uniformity.

Experimental example 1

Subject: the tobacco rods of the cigarettes which are not burned by heating and manufactured in the embodiments 1 to 3 are respectively listed as an experiment group A, an experiment group B and an experiment group C. Selecting common cigarette (pure and mild) which is not burnt by heating as a control group D, wherein the number of the cigarettes in each group is 10.

Purpose of the experiment: and (3) evaluating the six indexes of the smoke quantity, the aroma, the strength, the harmonious feeling, the irritation and the taste of the cigarette which is not combusted after being heated in each group to obtain a sensory evaluation record table after evaluation.

The experimental method comprises the following steps: each group of the cigarettes which are not combusted by heating is distributed to a company smoking committee of the company for smoking evaluation, smoking evaluation is carried out by adopting a smoking evaluation means which is well known in the industry, 7 persons in each group smoke one cigarette at a time, and then sensory description after smoking evaluation is recorded, wherein the sensory description is shown in a table 1.

TABLE 1 sensory evaluation record chart for each group of cigarette without burning

And transversely comparing the indexes, scoring the six indexes of the smoke quantity, the aroma, the strength, the harmonious feeling, the irritation and the taste of the cigarette which is not combusted after being heated according to the standard of full division of 5, 30, 10, 15 and 25, recording the single index scores of the samples of each group, and obtaining the following schematic diagrams of the six indexes of the control group and the experimental group, wherein the schematic diagrams are shown in figures 3 to 6.

The experimental result data show that the mint type slow-release sheet added with the bean fragrance note can uniformly feel the cool mint feeling and the compound fragrance of the bean fragrance in the smoking process, so that the fragrance style is well reflected, the satisfaction and the comfort of smoke are improved, and compared with the tobacco essence directly added, the mint type slow-release sheet added with the mint type slow-release sheet can be better in the persistence of the cool mint feeling and the uniformity of mouth-to-mouth release and better in the sense of rich fragrance.

Claims

1. A mint type heating non-combustible smoke slow-release material with a bean fragrance note is characterized by comprising a polymer base material and a flavoring material dispersed in the polymer base material, wherein the flavoring material comprises mint flavors, lactone flavors and organic acid.

2. The heating non-combustible smoke slow-release material according to claim 1, wherein said flavoring material is a material prepared by premixing raw materials including mint-based flavors, lactone-based flavors and organic acids, and said premixing time is not less than 48 hours.

3. The heating non-combustible smoke slow-release material according to claim 2, wherein the premixing time is not less than 240 hours.

4. The heat non-combustible smoke slow release material according to claim 2, wherein the premixing process is performed at room temperature.

5. The heating non-combustible smoke slow-release material according to any one of claims 1 to 4, wherein the mint-based flavor includes at least one of menthol, isopulegol, menthone, menthyl acetate, menthyl lactate, menthyl isovalerate, peppermint asian oil, peppermint oil, menthol glycoside.

6. The sustained-release material for heating non-combustible smoke according to any one of claims 1 to 4, wherein the lactone-based flavorant comprises at least one of valerolactone, caprolacton, undecylactone, caprolacton, caprylolactone, nonyllactone, caprinolactone, dodecalactone, coumarin, dihydrocoumarin, octahydrocoumarin, 6-methylcoumarin, and 7-methylcoumarin.

7. The heating non-combustible smoke slow-release material according to any one of claims 1 to 4, wherein the organic acid comprises at least one of lactic acid, tartaric acid, acetic acid, isovaleric acid, malic acid, citric acid and the like.

8. The heating non-combustible smoke slow-release material as claimed in any one of claims 1 to 4, wherein in the flavoring material, the mint-based spice, the lactone-based spice and the organic acid are mixed according to a mass ratio of 30-60: 20-50: 0.1 to 5 parts by weight.

9. The heating non-combustible smoke slow-release material according to claim 1, wherein the flavoring material comprises 40% of menthol, 8% of menthone, 20% of dihydrocoumarin, 6% of propyl caprolactone, 10% of propyl undecanolactone, 14% of butyl caprolactone and 2% of citric acid;

or, comprises menthol 40%, menthyl acetate 20%, octahydrocoumarin 20%, propyl caprolactone 13%, propyl undecanolactone 5% and citric acid 2%;

alternatively, 30% menthol, 4% menthone, 10% menthyl acetate, 20% dihydrocoumarin, 15% octahydrocoumarin, 20% propiolactone and 1% citric acid are included.

10. A slow-release material for cigarette which does not burn when heated as claimed in claim 1, wherein the percentage of the perfuming material is 0.001-80%.

11. The heating non-combustible smoke slow-release material according to claim 1, wherein the molecular weight of the polymer base material is 1 to 150 ten thousand.

12. The heat non-combustible smoke slow release material according to claim 11, wherein the polymer base material comprises at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methyl cellulose, hydroxypropyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose.

13. The heating non-combustible smoke slow-release material according to any one of claims 1 to 12, wherein the heating non-combustible smoke slow-release material is a sheet or a film material.

14. The heat non-combustible smoke slow-release material according to claim 13, wherein a polymer a layer is further compounded on the surface of the heat non-combustible smoke slow-release material, and the perfuming material is not added in the polymer a layer.

15. The heating non-combustible smoke sustained-release material according to claim 14, wherein the molecular weight of the polymer a is 1 to 150 ten thousand.

16. The heating non-combustible smoke slow-release material according to claim 15, wherein the polymer a contains at least one of polyvinylpyrrolidone, polyvinyl alcohol, polylactic acid, chitosan, methyl cellulose, hydroxypropyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose.

17. A method for preparing a slow-release material for smoke which does not burn when heated as claimed in any one of claims 1 to 16, wherein a polymer base material is dissolved by a solvent, and then the flavoring material is added, and the mixture is uniformly mixed to form a film, so that the slow-release material for smoke which does not burn when heated is prepared.

18. The method for producing a heat non-combustible smoke sustained-release material according to claim 17, wherein the heat non-combustible smoke sustained-release material is obtained by premixing a mint-based flavorant, a lactone-based flavorant and an organic acid, adding the mixture to a polymer base solution, and removing the solvent after coating.

19. The method of claim 18, wherein the premixing time is 240 hours or more.

20. The method of claim 17, wherein the solvent comprises at least one of water, ethanol, propylene glycol, and ethyl acetate.

21. The method of claim 20, wherein the mass ratio of the polymer substrate to the solvent is 1:1 to 1: 20.

22. The method according to any one of claims 18 to 21, wherein the surface of the sustained-release material is further coated with a solution of the polymer a, dried, and coated with a polymer a layer.

23. Use of a slow release material according to any one of claims 1 to 16, or a slow release material prepared by a method according to any one of claims 17 to 22, for the manufacture of a tobacco product which does not burn on heating.

24. Use according to claim 23, for making a tobacco rod for heating a non-combustible smoking article.

25. The use according to claim 24, in combination with tobacco material, for making a tobacco rod for a non-combustible smoking article.

26. A tobacco rod of a mint type heating non-combustion tobacco product with a slow-release bean fragrance note, which is characterized by comprising the slow-release material of any one of claims 1 to 16 or the slow-release material prepared by the preparation method of any one of claims 17 to 22.

27. A tobacco rod for a heated non-combustible smoking article according to claim 26, being a unitary tobacco rod formed by combining a filamentary or sheet-like slow release material with tobacco thread.

28. A tobacco rod for a heated non-combustible smoking article according to claim 26, wherein the shaped release material is rolled into a cylindrical shape and combined with a hollow cooling section to form a unitary tobacco rod.

29. A mint-type heat-not-burn tobacco product having a sustained-release bean note, comprising the tobacco rod according to any one of claims 26 to 28.