A kind of sweet flavor with slow-controlled release and filter rod for cigarette and preparation method thereof

Abstract

The present invention provides a controlled-release sweet flavor and a filter rod for cigarettes and a preparation method thereof. The preparation method of the flavor is as follows: (1) emulsifying a wall material with an emulsifier to obtain a wall material matrix, and dissolving the wall material matrix in an ethanol aqueous solution to obtain a wall material matrix solution; (2) preparing a sweetener solution; (3) mixing the wall material matrix solution and the sweetener solution to obtain a solution I; (4) mixing the solution I with triacetin, and dispersing at high speed to obtain a controlled-release sweet flavor. On this basis, the sweet flavor is sprayed and coated on a tow, and then sizing, forming and cutting are performed to obtain a filter rod for cigarettes. The present invention adopts an emulsified wall material matrix as a fat-soluble matrix, which effectively solves the problem that a water-soluble sweetener cannot be directly dissolved in triacetin. The flavor in the filter rod is slowly and continuously dissolved and released, thereby improving the comfort of smoking cigarettes and reducing the harm of cigarettes to human health.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco flavors, and in particular relates to a method for preparing a sweet flavor with slow-controlled release and a filter rod for cigarettes. Background Art

[0002] During the smoking process, the bitter substances produced by high-temperature burning of tobacco combine with oral mucosal substances, which will cause the oral or throat mucosa to contract. Mucosal contraction will cause the oral or throat to dry out, giving consumers a negative experience. The mechanism of action of sweeteners on the oral or throat mucosa is exactly the opposite, which manifests as mucosal divergence and moistening of the oral cavity and throat. Therefore, cigarettes that give consumers a sweet feeling when smoking are popular in the market and have always been the goal pursued by cigarette product development.

[0003] Cigarette filter rods are the main carrier for sweetening because they can directly contact the lips and directly feel the sweetness when smoking cigarettes. Most of the existing technologies prepare tobacco sweeteners into particles and place them in filter rods. This technology requires that the tobacco sweeteners be prepared into particles first, then added to the filter rod, and then compounded with the normal filter rod front and back. The process is complicated and the cost is high. Moreover, because the part that contacts the mouth is not the particle section with sweeteners, but the normal filter rod, the sweetening effect of this technology is not direct and not ideal.

[0004] The sweetener can be prepared into a sweet flavor, added to triacetin, and added to the tow along with triacetin during the rod making process to prepare a sweet cigarette filter rod. This allows the entire filter rod to be a sweet tow. When the consumer smokes, the mouth can directly contact the sweet flavor and feel the sweetness. The process is simple, the cost is low, the sweetening effect is good, and only a small amount of sweetener is needed to achieve the sweetening effect. However, there is no related research and development on this technology. This is mainly because sweeteners are water-soluble, while triacetin cannot be dissolved in water. Such sweeteners cannot be directly dissolved in triacetin. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for preparing a sweet flavor with slow-controlled release and a filter rod for cigarettes. Aiming at the special needs in the preparation process of the flavor and filter rod for cigarettes, the present invention provides a sweet flavor that can be directly added to triacetin for the filter rod for cigarettes, the flavor can be well dissolved in triacetin and protected by a special matrix material, and the prepared filter rod for cigarettes has a good sweet effect.

[0006] The technical solution provided by the present invention is as follows:

[0007] One of the purposes of the present invention is to provide a method for preparing a sweet flavor with slow-release and controlled-release, comprising the following steps:

[0008] (1) emulsifying the wall material with an emulsifier to obtain a wall material matrix, and dissolving the wall material matrix in an ethanol aqueous solution to obtain a wall material matrix solution;

[0009] (2) preparing a sweetener solution;

[0010] (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I;

[0011] (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

[0012] Furthermore, the wall material is selected from one or a mixture of sucrose ester, polyglycerol ricinoleate, vinyl acetate, monoglyceride, and propylene glycol monostearate.

[0013] Furthermore, the emulsifier is selected from one or a mixture of Span60, Span65, Span80, Glucate-SS, and its HLB value is between 3 and 6. The mass ratio of the wall material to the emulsifier is 5-20:1.

[0014] Furthermore, the mass ratio of the wall material matrix to the ethanol aqueous solution is 1:1-15, the volume concentration of the ethanol aqueous solution is 50%-70%, the mixing stirring speed is 100-500r / min, the temperature is 25-55°C, and the stirring time is 0.5-2h. Preferably, the viscosity of the wall material matrix solution is 5-20cPa.s.

[0015] Furthermore, in step (2), the sweetener solution is prepared by dissolving a carbohydrate, a sweetener and an acid in an ethanol aqueous solution with a volume concentration of 0%-20%; wherein the mass ratio of the carbohydrate, the sweetener and the acid is 3-25:1-5:3-10; the mass ratio of the total mass of the carbohydrate, the sweetener and the acid to the ethanol aqueous solution is 1:1-20; the carbohydrate is selected from one or a mixture of glucose, fructose, sucrose, maltose, starch sugar and lactose; the sweetener is selected from one or a mixture of saccharin, saccharin sodium, sodium cyclamate, aspartame, acesulfame potassium, sucralose and neotame; the acid is selected from one or a mixture of lactic acid, acetic acid, citric acid and malic acid; and during the dissolution process, the stirring speed is 100-500 r / min, the temperature is 25-55° C., and the stirring time is 0.5-2 h.

[0016] Furthermore, in step (3), the mass ratio of the sweetener solution to the wall material matrix solution is 1:1-20; the stirring speed is 100-500 r / min, the temperature is 25-55° C., and the stirring time is 0.5-2 h; and the mixing method is to add the sweetener solution dropwise to the wall material matrix solution while stirring.

[0017] Furthermore, in the step (4), the mass ratio of solution I to triacetin is 1:1-20, the dispersion is carried out in an atmosphere with a pressure of 30-60 MPa, the stirring speed is 13000-25000 r / min, and the dispersion time is 90-150 min.

[0018] The second object of the present invention is to provide a sweet flavor with slow-controlled release prepared by the above method.

[0019] The third object of the present invention is to provide a method for preparing a filter rod for cigarettes having a slow-release sweet flavor, comprising the following steps:

[0020] (1) spraying and coating the above-mentioned slow-release sweet flavor on the tobacco tow at 10-30% of the weight of the tobacco tow, and then applying sizing;

[0021] (2) feeding the tow into the forming cavity of the filter forming unit to form a long tow strip containing sweet flavor, and then wrapping it with forming paper;

[0022] (3) Cutting can obtain a filter rod for tobacco with slow-controlled release of sweet flavor.

[0023] A fourth object of the present invention is to provide a cigarette filter rod having a slow-release sweet flavor prepared by the above method.

[0024] Beneficial effects of the present invention:

[0025] (1) The sweet flavor prepared by the present invention is a fat-soluble controlled-release sweet flavor for tobacco, which can be added to triacetin to directly prepare a sweet filter stick, thereby broadening the application scope of the sweet flavor;

[0026] (2) The present invention uses an emulsified wall material matrix as a fat-soluble matrix to encapsulate the water-soluble sweetener, which can effectively solve the problem that the water-soluble sweetener cannot be directly dissolved in triacetin, thereby greatly improving the utilization effect of the sweetener;

[0027] (3) In the preparation process of sweet triacetin, ultrasonic emulsification technology is used to evenly mix the liquid sustained-release mint flavor and triacetin together, ensuring the uniform distribution of the sweetness of the cigarette filter rod;

[0028] (4) The solvents used in the present invention are water and ethanol, both of which are edible solvents and safer. Triacetin and slow-release sweet flavor can be combined to make the system more uniform.

[0029] (5) The preparation method provided by the present invention has simple procedures, low cost, good sweetening effect, and only a small amount of sweetener is needed to achieve the sweetening effect;

[0030] (6) The sweetener in the flavor and filter rod prepared by the present invention is mainly added to triacetin. When consumers smoke cigarettes, saliva gradually contacts the filter rod, and the flavor is slowly and continuously dissolved and released, thereby improving the comfort of smoking cigarettes and reducing the harm of cigarettes to human health. DETAILED DESCRIPTION

[0031] The content of the present invention is further described below in conjunction with specific embodiments, but the content of the present invention is not limited thereto at all.

[0032] A method for preparing a sweet flavor with slow-controlled release comprises the following steps:

[0033] (1) emulsifying the wall material with an emulsifier to obtain a wall material matrix, and dissolving the wall material matrix in an ethanol aqueous solution to obtain a wall material matrix solution;

[0034] (2) preparing a sweetener solution;

[0035] (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I;

[0036] (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

[0037] Furthermore, the wall material is selected from one or a mixture of sucrose ester, polyglycerol ricinoleate, vinyl acetate, monoglyceride, and propylene glycol monostearate.

[0038] Furthermore, the emulsifier is selected from one or a mixture of Span60, Span65, Span80, Glucate-SS, and its HLB value is between 3 and 6. The mass ratio of the wall material to the emulsifier is 5-20:1.

[0039] Furthermore, the mass ratio of the wall material matrix to the ethanol aqueous solution is 1:1-15, the volume concentration of the ethanol aqueous solution is 50%-70%, the mixing stirring speed is 100-500r / min, the temperature is 25-55°C, and the stirring time is 0.5-2h. Preferably, the viscosity of the wall material matrix solution is 5-20cPa.s.

[0040] Furthermore, in step (2), the sweetener solution is prepared by dissolving a carbohydrate, a sweetener and an acid in an ethanol aqueous solution with a volume concentration of 0%-20%; wherein the mass ratio of the carbohydrate, the sweetener and the acid is 3-25:1-5:3-10; the mass ratio of the total mass of the carbohydrate, the sweetener and the acid to the ethanol aqueous solution is 1:1-20; the carbohydrate is selected from one or a mixture of glucose, fructose, sucrose, maltose, starch sugar and lactose; the sweetener is selected from one or a mixture of saccharin, saccharin sodium, sodium cyclamate, aspartame, acesulfame potassium, sucralose and neotame; the acid is selected from one or a mixture of lactic acid, acetic acid, citric acid and malic acid; and during the dissolution process, the stirring speed is 100-500 r / min, the temperature is 25-55° C., and the stirring time is 0.5-2 h.

[0041] Furthermore, in step (3), the mass ratio of the sweetener solution to the wall material matrix solution is 1:1-20; the stirring speed is 100-500 r / min, the temperature is 25-55° C., and the stirring time is 0.5-2 h; and the mixing method is to add the sweetener solution dropwise to the wall material matrix solution while stirring.

[0042] Furthermore, in the step (4), the mass ratio of solution I to triacetin is 1:1-20, the dispersion is carried out in an atmosphere with a pressure of 30-60 MPa, the stirring speed is 13000-25000 r / min, and the dispersion time is 90-150 min.

[0043] A method for preparing a filter rod for cigarettes having a slow-release sweet flavor, comprising the following steps:

[0044] (1) spraying and coating the above-mentioned slow-release sweet flavor on the tobacco tow at 10-30% of the weight of the tobacco tow, and then applying sizing;

[0045] (2) feeding the tow into the forming cavity of the filter forming unit to form a long tow strip containing sweet flavor, and then wrapping it with forming paper;

[0046] (3) Cutting can obtain a filter rod for tobacco with slow-controlled release of sweet flavor.

[0047] In the following examples, the concentrations of the ethanol solutions are all volume concentrations.

[0048] Example 1

[0049] 1. Preparation of sweet flavors with slow and controlled release

[0050] The preparation steps are as follows:

[0051] (1) Preparation of wall material matrix solution

[0052] ①. Weigh 5kg of wall material according to the ratio of sucrose ester to polyglycerol ricinoleate = 4:1 (mass ratio);

[0053] ②. Select Span60 as the emulsifier, and weigh 500g of Span60 according to the ratio of wall material to emulsifier of 10:1 (mass ratio);

[0054] ③. According to the ratio of wall material matrix to 50% ethanol aqueous solution = 1:1 (mass ratio), 5.5 kg of 70% ethanol aqueous solution was weighed and mixed therein at a stirring speed of 300 r / min, a temperature of 40°C, and a stirring time of 0.5 h to obtain a wall material matrix solution.

[0055] (2) preparing a sweetener solution;

[0056] ①. According to the mass ratio of 2:1, weigh 25 kg of sucrose and fructose in total and use them as sugar substances.

[0057] ②. Weigh 1 kg of saccharin sodium and neotame in a mass ratio of 10:1 and use as sweeteners.

[0058] ③. Weigh 3 kg of lactic acid, citric acid and malic acid in a mass ratio of 1:5:8 and use them as acid substances.

[0059] ④. According to the mass ratio of sugar substance: sweetener: acid substance = 25:1:3, weigh the sugar substance, sweetener and acid substance, the total mass of the three is 5kg, according to the mass ratio of the total mass of sugar substance, sweetener and acid substance to ethanol aqueous solution is 1:1, weigh 5kg of 0% ethanol aqueous solution (i.e., aqueous solution). Under the conditions of 25°C and stirring speed of 300rpm, mix and stir for 0.5 hours until the components are evenly mixed to obtain the sweetener solution of this embodiment.

[0060] (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I;

[0061] According to the mass ratio of the wall material matrix solution to the sweetener=1:1, 1 kg of the wall material matrix solution and 1 kg of the sweetener solution were weighed respectively, and the sweetener solution was added dropwise to the wall material matrix solution at 25°C and a stirring speed of 300 rpm, while stirring. After stirring for 0.5 hour, the solution I of this embodiment was obtained.

[0062] (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

[0063] According to the mass ratio of solution I to triacetin = 1:1, 2 kg of solution I and 2 kg of triacetin were weighed respectively; the dispersion was carried out in an atmosphere with a pressure of 30 MPa, a stirring speed of 13000 r / min, and a dispersion time of 90 min.

[0064] 2. Preparation of a cigarette filter rod with a slow-release sweet flavor

[0065] The preparation steps are as follows:

[0066] (1) spraying and coating the above-mentioned slow-release sweet flavor on the tobacco tow at 10% of the weight of the tobacco tow, and then applying sizing;

[0067] (2) feeding the tow into the forming cavity of the filter forming unit to form a long tow strip containing sweet flavor, and then wrapping it with forming paper;

[0068] (3) Cutting can obtain a filter rod for tobacco with slow-controlled release of sweet flavor.

[0069] Example 2

[0070] 1. Preparation of sweet flavors with slow and controlled release

[0071] The preparation steps are as follows:

[0072] (1) Preparation of wall material matrix solution

[0073] ①. Weigh 2kg of wall material according to the mass ratio of vinyl acetate to monoglyceride = 3:1;

[0074] ②. Select Span65: Span: 80 = 1: 1 (mass ratio) as the emulsifier, and weigh 200g of Span65 and Span: 80 in total according to the wall material and emulsifier ratio of 10: 1 (mass ratio);

[0075] ③. According to the ratio of wall material matrix: 60% ethanol aqueous solution = 1:5 (mass ratio), 11 kg of 70% ethanol aqueous solution was weighed and mixed and stirred at a stirring speed of 400 r / min, a temperature of 35°C, and a stirring time of 1 h to obtain a wall material matrix solution.

[0076] (2) preparing a sweetener solution;

[0077] ①. According to the mass ratio of 2:1:1, weigh 20kg of glucose, maltose and fructose in total and use them as carbohydrate substances.

[0078] ②. According to the mass ratio of 10:1, weigh 1kg of saccharin sodium and cyclamate in total and use it as sweetener.

[0079] ③. According to the mass ratio of 1:5:8, weigh 3kg of acetic acid, citric acid and malic acid and use them as acid substances.

[0080] ④. According to the mass ratio of sugar substance: sweetener: acid substance = 20:1:3, weigh the sugar substance, sweetener and acid substance, the total mass of the three is 1kg, according to the mass ratio of the total mass of sugar substance, sweetener and acid substance to ethanol aqueous solution is 1:10, weigh 10kg of 10% ethanol aqueous solution. Under the conditions of 30°C and stirring speed of 400rpm, mix and stir for 1 hour until the components are evenly mixed to obtain the sweetener solution of this embodiment.

[0081] (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I;

[0082] According to the mass ratio of the wall material matrix solution to the sweetener=1:5, 1 kg of the wall material matrix solution and 5 kg of the sweetener solution were weighed respectively, and the sweetener solution was added dropwise to the wall material matrix solution at 30°C and a stirring speed of 400 rpm, while stirring. After stirring for 1 hour, the solution I of this embodiment was obtained.

[0083] (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

[0084] According to the mass ratio of solution I to triacetin = 1:5, 1 kg of solution I and 5 kg of triacetin were weighed respectively; the dispersion was carried out in an atmosphere with a pressure of 40 MPa, the stirring speed was 20000 r / min, and the dispersion time was 120 min.

[0085] 2. Preparation of a cigarette filter rod with a slow-release sweet flavor

[0086] The preparation steps are as follows:

[0087] (1) spraying and coating the above-mentioned slow-release sweet flavor on the tobacco tow at 20% of the weight of the tobacco tow, and then applying sizing;

[0088] (2) feeding the tow into the forming cavity of the filter forming unit to form a long tow strip containing sweet flavor, and then wrapping it with forming paper;

[0089] (3) Cutting can obtain a filter rod for tobacco with slow-controlled release of sweet flavor.

[0090] Example 3

[0091] 1. Preparation of sweet flavors with slow and controlled release

[0092] The preparation steps are as follows:

[0093] (1) Preparation of wall material matrix solution

[0094] ①. Weigh 1kg of wall material according to the ratio of sucrose ester to propylene glycol monostearate = 1:1 (mass ratio);

[0095] ②. Select Span80: Glucate-SS = 2:1 (mass ratio), and weigh 50g of Span80 and Glucate-SS according to the wall material and emulsifier ratio of 20:1 (mass ratio);

[0096] ③. According to the ratio of wall material matrix to 70% ethanol aqueous solution = 1:15 (mass ratio), 15.75 kg of 70% ethanol aqueous solution was weighed and mixed therein at a stirring speed of 500 r / min, a temperature of 55°C, and a stirring time of 1 h to obtain a wall material matrix solution.

[0097] (2) preparing a sweetener solution;

[0098] ①. According to the mass ratio of 2:1:2, weigh 23kg of maltose, starch sugar and lactose and use them as carbohydrate substances.

[0099] ②. Weigh 1 kg of acesulfame potassium and sucralose in a mass ratio of 5:1 and use as sweeteners.

[0100] ③. Weigh 3 kg of lactic acid, citric acid and malic acid in a mass ratio of 1:3:6 and use them as acid substances.

[0101] ④. According to the mass ratio of sugar substance: sweetener: acid substance = 23:1:2, weigh the sugar substance, sweetener and acid substance, the total mass of the three is 5kg, according to the mass ratio of the total mass of sugar substance, sweetener and acid substance to ethanol aqueous solution is 1:20, weigh 5kg of 20t% ethanol aqueous solution. Mix and stir at 40°C and 500rpm for 2 hours until the components are evenly mixed to obtain the sweetener solution of this embodiment.

[0102] (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I;

[0103] According to the mass ratio of the wall material matrix solution to the sweetener=1:10, 1 kg of the wall material matrix solution and 10 kg of the sweetener solution were weighed respectively, and the sweetener solution was added dropwise to the wall material matrix solution at 40°C and a stirring speed of 500 rpm, while stirring. After stirring for 2 hours, the solution I of this embodiment was obtained.

[0104] (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

[0105] According to the mass ratio of solution I to triacetin = 1:20, 1 kg of solution I and 20 kg of triacetin were weighed respectively; dispersion was carried out in an atmosphere with a pressure of 60 MPa, a stirring speed of 25000 r / min, and a dispersion time of 150 min.

[0106] 2. Preparation of a cigarette filter rod with a slow-release sweet flavor

[0107] The preparation steps are as follows:

[0108] (1) spraying and coating the above-mentioned slow-release sweet flavor on the tobacco tow at 30% of the weight of the tobacco tow, and then applying sizing;

[0109] (2) feeding the tow into the forming cavity of the filter forming unit to form a long tow strip containing sweet flavor, and then wrapping it with forming paper;

[0110] (3) Cutting can obtain a filter rod for tobacco with slow-controlled release of sweet flavor.

[0111] Example 4

[0112] Sensory Quality Evaluation of Cigarettes

[0113] According to the national standard GB5606.4-2005, the sensory quality of cigarette samples containing conventional filter tips and cigarette samples prepared by the filter rods of Examples 1 to 3 were evaluated by 10 smokers, and the average scores are shown in Table 1.

[0114] Table 1 Suction test results

[0115]

[0116] The three embodiments were compared with the comparative embodiments, and the results showed that:

[0117] 1. The aroma is slightly lost.

[0118] 2. The natural, comfortable and refreshing sweetness can improve oral comfort, thereby increasing the scores of miscellaneous smell, stimulation and aftertaste, and improving the overall smoking comfort of the cigarette.

[0119] Example 5

[0120] Hazardous substances testing

[0121] The cigarette filter rods prepared in Examples 1 to 3 were subjected to comparative tests with cigarettes without adding wall material matrix and sweetener, and tested according to ISO and GB methods, as shown in Table 2.

[0122] Table 2 Routine detection of flue gas (tar, nicotine, CO)

[0123]

[0124]

[0125] The above description is only a preferred specific implementation manner of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the scope of protection of the invention.

Claims

1. A method for preparing a sweet flavor with slow and controlled release, characterized in that: The following steps are involved: (1) emulsifying a wall material with an emulsifier to obtain a wall material matrix, and dissolving the wall material matrix in an ethanol aqueous solution to obtain a wall material matrix solution; the wall material is selected from one or a mixture of sucrose ester, polyglycerol ricinoleate, vinyl acetate, monoglyceride, and propylene glycol monostearate; (2) preparing a sweetener solution; the sweetener is prepared by dissolving a sugar substance, a sweetener and an acid substance in an ethanol aqueous solution with a volume concentration of 0-20%; (3) mixing the wall material matrix solution and the sweetener solution to obtain solution I; (4) Solution I and triacetin are mixed and dispersed at high speed to obtain a sustained-release sweet flavor.

2. The method for preparing a sweet flavor with sustained and controlled release according to claim 1, characterized in that: The emulsifier is selected from one of Span60, Span65, Span80, Glucate-SS or a mixture of several thereof, and its HLB value is between 3-6.

3. The method for preparing a sweet flavor with slow-controlled release according to claim 1, characterized in that: The mass ratio of the wall material matrix to the ethanol aqueous solution is 1:1-15, the volume concentration of the ethanol aqueous solution is 50%-70%; the mixing stirring speed is 100-500r / min, the temperature is 25-55°C, and the stirring time is 0.5-2h.

4. The method for preparing a sweet flavor with slow-controlled release according to claim 1, characterized in that: In the step (2), the mass ratio of the carbohydrate, sweetener and acid is 3-25:1-5:3-10; the mass ratio of the total mass of the carbohydrate, sweetener and acid to the ethanol aqueous solution is 1:1-20; the carbohydrate is selected from one or a mixture of glucose, fructose, sucrose, maltose, starch sugar and lactose; the sweetener is selected from one or a mixture of saccharin, saccharin sodium, cyclamate, aspartame, acesulfame potassium, sucralose and neotame; the acid is selected from one or a mixture of lactic acid, acetic acid, citric acid and malic acid; the stirring speed during the dissolution process is 100-500 r / min, the temperature is 25-55°C, and the stirring time is 0.5-2h.

5. The method for preparing a sweet flavor with sustained and controlled release according to claim 1, characterized in that: In the step (3), the mass ratio of the sweetener solution to the wall material matrix solution is 1:1-20; the stirring speed is 100-500 r / min, the temperature is 25-55° C., and the stirring time is 0.5-2 h; and the mixing method is to add the sweetener solution drop by drop into the wall material matrix solution while stirring.

6. The method for preparing a sweet flavor with slow-controlled release according to claim 1, characterized in that: In the step (4), the mass ratio of solution I to triacetin is 1:1-20, and the dispersion is carried out in an atmosphere with a pressure of 30-60 MPa, a stirring speed of 13000-25000 r / min, and a dispersion time of 90-150 min.

7. A sweet flavor with slow and controlled release, characterized in that: The method according to any one of claims 1 to 6 is used to prepare the product.

8. A method for preparing a filter rod for cigarettes having a slow-release sweet flavor, characterized in that: The following steps are involved: (1) Spraying and coating the slow-release sweet flavoring agent as claimed in claim 7 at 10-30% of the weight of the tobacco tow on the tow, and then applying sizing; (2) feeding the tow into the forming cavity of the filter forming unit to form a long strip of tow containing sweet flavor, and then wrapping it with forming paper; (3) Cutting can obtain a filter rod for cigarettes with a slow-controlled release of sweet flavor.

9. A filter rod for cigarettes with slow-release sweet flavor, characterized in that: The method according to claim 8 is used to prepare the product.

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