A filter tip additive, preparation method thereof, filter tip and cigarette containing the same

Abstract

The present application provides a filter additive, a preparation method thereof, and a filter and cigarette comprising the same. The filter additive comprises: a porous inner core, comprising a flavoring agent, carboxymethyl chitosan, and a first substrate, wherein the degree of substitution of the carboxymethyl chitosan is less than 2; a first shell layer, the first shell layer is coated on the surface of the porous inner core, and the first shell layer comprises a metal salt and a second substrate. The filter additive of the present application has a good harm reduction effect. The porous structure of the porous inner core is conducive to the physical adsorption of harmful components. The flavoring agent has a good fragrance and / or taste enhancement effect to improve the consumer experience. The amino group of the carboxymethyl chitosan has a certain chemical adsorption effect with hydrogen cyanide and crotonaldehyde, and the carboxyl group has a certain neutralization effect with ammonia. Therefore, the use of the carboxymethyl chitosan can greatly reduce the inhalation of harmful components by the human body; at the same time, the metal ions in the metal salt of the first shell layer have a good adsorption effect on hydrogen cyanide, further optimizing the harm reduction effect of the filter additive.

Description

Technical Field

[0001] The present application relates to the field of cigarette manufacturing, and in particular to a filter tip additive, a preparation method thereof, and a filter tip and a cigarette comprising the same. Background Art

[0002] The filter is an important component of cigarettes and an important carrier for achieving cigarette harm reduction and product quality and style improvement. For example, the patent application with publication number CN 109105955A discloses a fluorescent color cigarette filter. By adding fluorescent powder to the filter, the filter can change with the light and display different colors in different smoking environments. However, it does not play any role in reducing the harmful components in cigarette smoke.

[0003] In addition, the patent application with publication number CN 112790424A adds a color-changing agent to an amino acid and choline solution to obtain a cigarette filter rod additive, which can achieve harm reduction by reacting with harmful components in cigarette smoke, and the color-changing agent in the cigarette filter rod additive can produce a color change after contacting with smoke. However, the use of amino acids and choline for harm reduction results in high costs and insufficient harm reduction effects. Summary of the invention

[0004] The present application provides a filter tip additive, a preparation method thereof, and a filter tip and a cigarette comprising the same, so as to solve the problem that the harm reduction effect of the additive in the prior art is insufficient.

[0005] The first aspect of the present application provides a filter additive, which includes: a porous inner core, including a flavoring agent, carboxymethyl chitosan and a first substrate, wherein the degree of substitution of the carboxymethyl chitosan is less than 2; a first shell layer, the first shell layer is coated on the surface of the porous inner core, and the first shell layer includes a metal salt and a second substrate.

[0006] Furthermore, the porous inner core comprises, by weight, 1-10 parts of flavoring agent, 20-50 parts of carboxymethyl chitosan and 10-25 parts of the first substrate.

[0007] Furthermore, the flavoring agent is a plant-derived flavoring agent.

[0008] Furthermore, it is preferred that the flavoring agent is a floral flavoring agent.

[0009] Furthermore, the flavoring agent is any one or more of dried chrysanthemum, dried rose, dried peony, and dried lily.

[0010] Furthermore, the degree of substitution of the carboxymethyl chitosan is 0.5 to 1.5.

[0011] Furthermore, the first substrate is selected from any one or more of β-cyclodextrin, white dextrin, yellow dextrin, and maltodextrin.

[0012] Furthermore, the porous inner core also includes a humectant, and the humectant is preferably selected from any one or more of sorbitol, xylitol, and maltose oligosaccharide.

[0013] Furthermore, the weight portion of the humectant is 5-10 parts.

[0014] Furthermore, the porous inner core also includes any one of the preservatives, and preferably the weight portion of the preservative is 1-5 parts.

[0015] Furthermore, the first shell layer includes 1-20 parts of metal salt and 1-20 parts of the second substrate in parts by weight.

[0016] Furthermore, the metal salt is selected from any one or more of divalent iron salts, trivalent iron salts, divalent zinc salts, and trivalent aluminum salts.

[0017] Furthermore, the second substrate is selected from any one or more of polyethylene glycol and triacetin, and preferably the polyethylene glycol includes PEG200, PEG400, and PEG600.

[0018] Furthermore, the thickness of the first shell layer is 0.1-100 μm, preferably 20-40 μm.

[0019] Furthermore, the BET specific surface area of ​​the porous core is 5-50 m 2 / g, preferably 15-30m 2 / g, and / or the particle size of the porous inner core is 30 to 60 meshes.

[0020] Furthermore, the filter additive also includes a second shell layer, which is coated on the outer surface of the first shell layer, and the second shell layer includes a color-changing agent and a third substrate.

[0021] Furthermore, the second shell layer includes 1-20 parts of a color-changing agent and 1-10 parts of a third substrate, based on weight.

[0022] Optionally, the color-changing agent is a natural pigment, and preferably the color-changing agent is selected from any one or more of gardenia yellow, monascus red, and carotene;

[0023] Further, the third substrate is selected from any one or more of polyethylene glycol and triacetin. Further, polyethylene glycol includes PEG200, PEG400, and PEG600.

[0024] Furthermore, the second shell layer also includes a dispersant, and the dispersant is selected from any one or more of glycerol and propylene glycol.

[0025] Furthermore, it is preferred that the weight portion of the dispersant is 1-10 parts.

[0026] Furthermore, the thickness of the second shell layer is 0.1-100 μm, preferably 30-55 μm.

[0027] The second aspect of the present application provides a method for preparing any of the above-mentioned filter additives, the preparation method comprising: step S1, preparing a liquid flavor mixture comprising a flavoring agent, at least a portion of a first substrate and water; step S2, mixing carboxymethyl chitosan, the remaining portion of the first substrate, a foaming agent and water and foaming the mixture to obtain a foaming slurry; step S3, mixing an optional preservative, the foaming slurry and the liquid flavor mixture and granulating the mixture to obtain a porous inner core; step S4, preparing a metal salt mixture comprising a metal salt, a second substrate and water, coating the metal salt mixture on the porous inner core and drying the mixture to form a first shell layer on the porous inner core.

[0028] Furthermore, the foaming agent is selected from any one or more of baking powder, dry yeast, and sodium bicarbonate, and preferably the mass ratio of baking powder to carboxymethyl chitosan is 3-8 parts.

[0029] Further, step S3 comprises: drying, crushing and screening the foaming slurry and the liquid flavor mixture after mixing to obtain a porous inner core, and preferably the drying temperature is 50-80°C.

[0030] Further, step S4 includes: preparing a metal salt mixture including a metal salt, a second substrate and water; coating the metal salt mixture onto the porous inner core by a spraying process to form a first shell layer on the porous inner core.

[0031] Furthermore, the preparation method also includes: preparing a color-changing agent mixture including a color-changing agent, a third substrate, water and an optional dispersant; coating the color-changing agent mixture on the surface of the first shell layer and drying it to form a second shell layer on the surface of the first shell layer; preferably coating the color-changing agent mixture on the surface of the first shell layer by a spray process and drying it to form a second shell layer on the surface of the first shell layer.

[0032] The third aspect of the present application provides a filter, including a filter additive, wherein the filter additive is any one of the filter additives described above.

[0033] The third aspect of the present application provides a cigarette, comprising a filter tip, which is the filter tip described above.

[0034] Furthermore, the amount of the filter additive is 10 mg to 60 mg per cigarette.

[0035] Furthermore, the amount of the filter additive is 20 mg to 40 mg per cigarette.

[0036] The filter additive of the present application has a good harm reduction effect, wherein the porous structure of the porous inner core is conducive to the physical adsorption of harmful components, and the flavoring agent in the porous inner core has a good aroma and / or taste enhancement effect to improve the consumer experience, the amino group of carboxymethyl chitosan has a certain chemical adsorption effect with hydrogen cyanide and crotonaldehyde, and the carboxyl group of carboxymethyl chitosan has a certain neutralization effect with ammonia, so the use of the carboxymethyl chitosan can greatly reduce the inhalation of harmful components by the human body; at the same time, the metal ions in the metal salt of the first shell layer have a good adsorption effect on hydrogen cyanide, further optimizing the harm reduction effect of the filter additive. DETAILED DESCRIPTION

[0037] The following embodiments further describe the implementation of the present application in detail. The detailed description of the following embodiments is used to illustrate the principle of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0038] As analyzed in the background technology of this application, the harm reduction effect of the existing filter additives is insufficient. In order to solve this problem, this application analyzes the harmful components in cigarette smoke and finds that hydrogen cyanide is the main component of the harmful components. Therefore, how to reduce the hydrogen cyanide in cigarette smoke as much as possible is the key to harm reduction. On this basis, the applicant studies the physicochemical properties of hydrogen cyanide, and according to the research results, provides a filter additive, a preparation method thereof, and a filter and cigarette comprising the same.

[0039] In a typical embodiment of the present application, a filter additive is provided, which includes a porous core and a first shell layer, the porous core includes a flavoring agent, carboxymethyl chitosan and a first substrate, wherein the degree of substitution of the carboxymethyl chitosan is less than 2; the first shell layer is coated on the surface of the porous core, and the first shell layer includes a metal salt and a second substrate.

[0040] The filter additive of the present application has a good harm reduction effect, wherein the porous structure of the porous inner core is conducive to the physical adsorption of harmful components, and the flavoring agent in the porous inner core has a good aroma and / or taste enhancement effect to improve the consumer experience, the amino group of carboxymethyl chitosan has a certain chemical adsorption effect with hydrogen cyanide and crotonaldehyde, and the carboxyl group of carboxymethyl chitosan has a certain neutralization effect with ammonia, so the use of the carboxymethyl chitosan can greatly reduce the inhalation of harmful components by the human body; at the same time, the metal ions in the metal salt of the first shell layer have a good adsorption effect on hydrogen cyanide, further optimizing the harm reduction effect of the filter additive.

[0041] The pores of the porous inner core of the present application are formed by a foaming process.

[0042] In some embodiments, the porous core includes 1-10 parts of flavoring agent, 20-50 parts of carboxymethyl chitosan and 10-25 parts of the first substrate in parts by weight. Carboxymethyl chitosan has good moisture absorption and moisture retention, film-forming property and air permeability. The flavoring agent, carboxymethyl chitosan and the first substrate are combined in the above parts by weight, which can fully exert their respective functions and is conducive to improving the structural stability and moisture retention of the porous core.

[0043] The flavoring agent of the present application is a substance that enriches the flavor of the filter additive. Therefore, any flavoring agent that can achieve the above functions, is safe and can be accepted by the human body can be considered for application in the present application, such as flavoring agents of plant origin, synthetic flavoring agents, and flavoring agents of animal origin. In some embodiments, optionally, the flavoring agent is a plant-derived flavoring agent, preferably a flower flavoring agent, and further preferably, the flavoring agent is any one or more of dried chrysanthemum, dried rose, dried peony, and dried lily. The above-mentioned plant-derived flavoring agents are more suitable for cigarettes and have better integration with the flavor of the cigarette itself. The above-mentioned dried chrysanthemum, dried rose, dried peony, and dried lily can all be commercial products, and the moisture content of each is based on the moisture content of various types of dried flower products at present, for example, the moisture content is controlled to be below 10%. In some embodiments, the weight proportion of the above-mentioned flavoring agent is preferably 1 to 5 parts, more preferably 3 to 5 parts, such as 3 parts, 4 parts or 5 parts; the weight proportion of carboxymethyl chitosan is 25-45 parts, such as 25 parts, 35 parts or 45 parts; the weight proportion of the first substrate is 14-22 parts, such as 14 parts, 16 parts, 20 parts, 21 parts or 22 parts.

[0044] In some embodiments, in order to improve the chemical adsorption of carboxymethyl chitosan on hydrogen cyanide and crotonaldehyde, the degree of substitution of carboxymethyl chitosan is preferably 0.5 to 1.5. When the degree of substitution is less than 1, the carboxymethyl substitution is mainly on the hydroxyl group rather than the amino group; when the degree of substitution is close to 1 and higher than 1, carboxymethyl substitution occurs on both the hydroxyl group and the amino group to form O, N-carboxymethyl chitosan. Therefore, the amino content and carboxyl content in the carboxymethyl chitosan with a degree of substitution of 0.5 to 1.5 are relatively balanced and rich, and thus the adsorption effect on hydrogen cyanide, crotonaldehyde and ammonia is good. In some embodiments, the degree of substitution of carboxymethyl chitosan is preferably between 0.5 and 1.0, which further improves the adsorption effect on hydrogen cyanide and crotonaldehyde.

[0045] The first substrate used in the present application can be a substrate commonly used in filter additives. In some embodiments, the first substrate is optionally selected from any one or more of β-cyclodextrin, white dextrin, yellow dextrin, and maltodextrin. Dextrin substrates are highly safe and have good viscosity, so the structural stability of the porous core can be further improved.

[0046] In some embodiments, in order to improve the wettability of the filter additive, the porous core preferably further comprises a humectant, and the humectant is preferably selected from any one or more of sorbitol, xylitol, and maltose oligosaccharide, and the weight portion of the humectant is preferably 5-10 parts, preferably 5-8 parts, such as 5 parts, 6 parts, 7 parts or 8 parts. The alcohol humectant is highly safe and can enhance the aroma of the flavoring agent in the porous core.

[0047] Since the above components of the porous core are mainly carbohydrates, in order to extend the shelf life of the filter additive, in some embodiments, the porous core preferably also includes any one of the preservatives, and the weight portion of the preservative is preferably 1-5 parts, preferably 3-5 parts, such as 3 parts, 4 parts or 5 parts. The above preservative can be any one or more combinations of natamycin, nisin, potassium sorbate, sodium lactate, sodium dehydroacetate, etc.

[0048] The present application utilizes the metal ions in the metal salt of the first shell layer to improve the adsorption effect of hydrogen cyanide. On the basis that the porous core also has a high adsorption effect of hydrogen cyanide, in order to save the cost of the filter additive and reduce its volume, in some embodiments, preferably by weight, the first shell layer includes 1-20 parts of metal salt and 1-20 parts of the second substrate. The adsorption effect of metal salts is relatively strong, so the metal salt of cedar weight parts can achieve a good adsorption effect on hydrogen cyanide. It is further preferred that by weight, the first shell layer includes 1-10 parts of metal salt and 1-10 parts of the second substrate, preferably the first shell layer includes 1-5 parts of metal salt and 1-5 parts of the second substrate, and further preferably the first shell layer includes 2-5 parts of metal salt (such as 3 parts, 4 parts or 5 parts) and 2-5 parts of the second substrate (such as 2 parts, 3 parts, 4 parts or 5 parts).

[0049] In some embodiments, optionally, the metal salt is selected from any one or more of divalent iron salts, trivalent iron salts, divalent zinc salts, and trivalent aluminum salts. The above metal salts have good adsorption capacity and low cost. The above metal salts include but are not limited to nitrates, sulfates, and hydrochlorides, such as ferrous nitrate, ferric nitrate, ferrous chloride, ferric chloride, zinc sulfate, zinc chloride, aluminum chloride, aluminum nitrate, etc.

[0050] The second substrate can be selected to be the same as the first substrate. In some embodiments, the second substrate is selected from any one or more of polyethylene glycol and triacetin. Preferably, polyethylene glycol includes PEG200, PEG400, and PEG600. The polyethylene glycol and triacetin have good adhesion, so the fixation of the metal salt on the porous core is high, and the polyethylene glycol also has good wettability. At the same time, the ether bond therein has a hydrogen bond with phenol, which can play a certain adsorption effect on phenol. In some embodiments, the BET specific surface area of ​​the porous core is 5-50m 2 / g, preferably 15-30m 2 / g, so as to improve its physical adsorption of harmful components and the aroma release of flavoring agents therein. The pores of the porous core are formed by foaming during the preparation process, so the BET specific surface area can be controlled by controlling the degree of foaming.

[0051] In order to improve the applicability of filter additives in filters and improve the adsorption effect of the porous core and the first shell layer on harmful components in cigarette smoke, in some embodiments, the particle size of the porous core is preferably 30-60 mesh; the thickness of the first shell layer is 0.1-100μm, preferably 20-40μm.

[0052] In some embodiments, the filter tip additive further comprises a second shell layer, the second shell layer covers the outer surface of the first shell layer, and the second shell layer comprises a color-changing agent and a third substrate. By providing the second shell layer with the color-changing agent, the color of cigarette smoke changes when passing through the filter tip additive, thereby improving the sensory experience of consumers.

[0053] In some embodiments, optionally, by weight, the second shell layer comprises 1-10 parts of the discoloring agent and 1-5 parts of the third substrate. To provide significant color change, and avoid the effect of the internal pest control component. Preferably, by weight, the second shell layer comprises 1-10 parts of the discoloring agent and 1-5 parts of the third substrate, further preferably the second shell layer comprises 1-6 parts of the discoloring agent and 1-5 parts of the third substrate, more preferably the second shell layer comprises 3-5.5 parts of the discoloring agent (such as 3 parts, 4 parts, 5 parts or 5.2 parts) and 1-3 parts of the third substrate (such as 1 part, 1.3 parts, 2.3 parts, 2.6 parts or 3 parts).

[0054] In some embodiments, the color changing agent is preferably a natural pigment to improve the safety of the filter additive. It is further preferred that the color changing agent is selected from any one or more of gardenia yellow, monascus red, and carotene.

[0055] The third substrate in the second shell layer can be the same as the first substrate or the second substrate to improve the compatibility between the layers. In some embodiments, the third substrate is optionally selected from any one or more of polyethylene glycol and triacetin, and preferably polyethylene glycol includes PEG200, PEG400, and PEG600. The polyethylene glycol and triacetin have good adhesion, so the fixation of the color-changing agent is high, and the polyethylene glycol also has good wettability. At the same time, the ether bond therein has a hydrogen bond with phenol, which can play a certain adsorption effect on phenol.

[0056] In order to improve the uniformity of the dispersion of the color-changing agent in the second shell layer, in some embodiments, the second shell layer further includes a dispersant, and the dispersant is selected from any one or more of glycerol and propylene glycol. Preferably, the weight of the dispersant is 1-10 parts, and more preferably, the weight of the dispersant is 1-5 parts, and more preferably 1-3 parts (such as 1 part, 1.3 parts, 1.9 parts, 2.6 parts or 3 parts). This further improves the color-changing effect of the second shell layer. In addition, the glycerol and propylene glycol can also improve the wettability of the filter additive.

[0057] In some embodiments, the thickness of the second shell layer is optionally 0.1-100 μm, preferably 30-55 μm, which ensures that the color change effect is fully exerted and avoids the second shell layer being too thick, resulting in the internal components not being able to function effectively and timely.

[0058] In another typical embodiment of the present application, a method for preparing any of the above-mentioned filter additives is also provided, and the preparation method comprises: step S1, preparing a liquid flavor mixture comprising a flavoring agent, at least a portion of a first substrate and water; step S2, mixing carboxymethyl chitosan, the remaining portion of the first substrate, a foaming agent and water and foaming the mixture to obtain a foaming slurry; step S3, mixing an optional preservative, the foaming slurry and the liquid flavor mixture and granulating the mixture to obtain a porous inner core; step S4, preparing a metal salt mixture comprising a metal salt, a second substrate and water, coating the metal salt mixture on the porous inner core and drying the mixture to form a first shell layer on the porous inner core.

[0059] The above preparation method forms the pores of the porous inner core by foaming, so there is no need to use porous materials, and the carboxymethyl chitosan is foamed to improve the role of the amino and carboxyl groups of the carboxymethyl chitosan in the pores. The porous structure of the porous inner core of the filter additive formed by the above preparation method is conducive to the physical adsorption of harmful components, and the flavoring agent in the porous inner core has a good fragrance and / or flavor enhancement effect to improve the consumer experience. The amino group of the carboxymethyl chitosan has a certain chemical adsorption effect with hydrogen cyanide and crotonaldehyde, and the carboxyl group of the carboxymethyl chitosan has a certain neutralization effect with ammonia. Therefore, the use of the carboxymethyl chitosan can greatly reduce the inhalation of harmful components by the human body; at the same time, the metal ions in the metal salt of the first shell have a good adsorption effect on hydrogen cyanide, further optimizing the harm reduction effect of the filter additive.

[0060] The foaming agent used for foaming can be a conventional physical foaming agent or chemical foaming agent in the prior art. In order to simplify the foaming process, in some embodiments, the foaming agent is selected from any one or more of baking powder, dry yeast, and sodium bicarbonate. Each of the above foaming agents has good foaming ability, and the product and residue after foaming will not produce any odor when the smoke passes through. In some embodiments, the mass ratio of baking powder to carboxymethyl chitosan is preferably 3-8 parts. By controlling the mass ratio of baking powder to carboxymethyl chitosan within the above range, the foaming degree can be adaptively adjusted, thereby obtaining a BET specific surface area of ​​5-50m 2 / g porous core.

[0061] In order to avoid the loss of flavoring agents during the preparation process as much as possible, in some embodiments, step S3 includes: drying, crushing and screening the foaming slurry and the liquid flavor mixture to obtain a porous core, preferably at a drying temperature of 50-80°C.

[0062] In order to improve the uniformity of the first shell coating, in some embodiments, the above step S4 includes: preparing a metal salt mixture including a metal salt, a second substrate and water; coating the metal salt mixture onto the porous core by a spraying process to form a first shell layer on the porous core.

[0063] In order to improve the sensory experience of the filter, in some embodiments, the preparation method further includes: preparing a color-changing agent mixture including a color-changing agent, a third substrate, water and an optional dispersant; coating the color-changing agent mixture on the surface of the first shell layer and drying it to form a second shell layer on the surface of the first shell layer. The second shell layer having a color-changing agent is arranged on the surface of the first shell layer through the above process so that the cigarette smoke changes color when passing through the filter additive, thereby improving the sensory experience of consumers. Similarly, in order to improve the uniformity of the coating of the second shell layer, it is preferred to coat the color-changing agent mixture on the surface of the first shell layer and dry it through a spray process to form a second shell layer on the surface of the first shell layer.

[0064] In another typical embodiment of the present application, a filter is provided, comprising a filter additive, wherein the filter additive is any one of the filter additives described above.

[0065] The filter having the filter additive of the present application has a significant harm reduction effect and a good sensory experience.

[0066] In another typical embodiment of the present application, a cigarette is provided, including a filter, which is the above-mentioned filter, and preferably the amount of the filter additive is 10 mg to 60 mg per cigarette, and further preferably the amount of the filter additive is 20 mg to 40 mg per cigarette.

[0067] The cigarettes with the filter tip of the present application have a significant harm reduction effect and provide consumers with a good sensory experience.

[0068] The beneficial effects of the present application will be further illustrated below in combination with examples and comparative examples, but the scope of the present invention is not limited to these examples.

[0069] Example 1

[0070] (1) Preparation of flavored liquid preparations

[0071] First, the chrysanthemum is dried to a moisture content of less than 5% and crushed, and then 4 parts of chrysanthemum sieves with a mesh size of more than 100 and 3 parts of beta-cyclodextrin are added to 12 parts of water in sequence, and stirred to mix well to prepare a flavor liquid preparation.

[0072] (2) Preparation of aroma-enhancing and moisture-retaining porous granular materials

[0073] 25 parts of commercial carboxymethyl chitosan with a degree of substitution of 0.7 (Nantong Lvshen Bioengineering Co., Ltd.), 5 parts of sorbitol, 12 parts of white dextrin, 4 parts of baking powder and 25 parts of water are sequentially added into a kneader and stirred evenly, and then naturally allowed to stand at 20-30°C for 40 minutes to fully foam. After the foaming is completed, 15 parts of the flavor liquid preparation prepared in step (1) and 3 parts of sodium dehydroacetate are added and stirred evenly, and then dried at 50-80°C, granulated and sieved to obtain 30-60 mesh particles.

[0074] The BET specific surface area of ​​the product was 16 m 2 / g.

[0075] (3) Encapsulation of metal salts and polyethylene glycol

[0076] 3 parts of ferric chloride and 2 parts of PEG400 are added to 28 parts of water in sequence, and stirred evenly to form a ferric chloride mixed solution. 1 part of the ferric chloride mixed solution is sprayed onto 2 parts of the granular material prepared in step (2) to form a first shell layer with a thickness of 22 μm.

[0077] (4) Encapsulation of color-changing agent, glycerin and polyethylene glycol

[0078] 7 parts of gardenia yellow, 3 parts of glycerol and 3 parts of PEG400 are added to 70 parts of water in sequence, and stirred evenly to form a gardenia yellow mixed solution. 1 part of the gardenia yellow mixed solution is sprayed onto 2 parts of the material prepared in step (3) to form a second shell layer with a thickness of 32 μm, thereby obtaining the filter additive of Example 1.

[0079] Example 2

[0080] (1) Preparation of flavored liquid preparations

[0081] First, the roses are dried to a moisture content of less than 5% and crushed, and then 8 parts of rose sieves with a mesh size of more than 100 and 6 parts of beta-cyclodextrin are added to 15 parts of water in sequence, and stirred at high speed to prepare a flavor liquid preparation.

[0082] (2) Preparation of aroma-enhancing and moisture-retaining porous granular materials

[0083] 45 parts of commercial carboxymethyl chitosan with a degree of substitution of 0.9 (Nantong Lvshen Bioengineering Co., Ltd.), 8 parts of xylitol, 17 parts of yellow dextrin, 7 parts of baking powder and 28 parts of water are sequentially added into a kneader and stirred evenly, and then naturally allowed to stand at 20-30°C for 60 minutes to fully foam. After the foaming is completed, 18 parts of the flavor liquid preparation prepared in step (1) and 5 parts of sodium dehydroacetate are added and stirred evenly, and then dried at 50-80°C, granulated and sieved to obtain 30-60 mesh particles.

[0084] The BET specific surface area was found to be 22 m 2 / g.

[0085] (3) Encapsulation of metal salts and polyethylene glycol

[0086] 5 parts of zinc chloride and 5 parts of PEG600 are added to 40 parts of water in sequence, and stirred evenly to form a zinc chloride mixed solution. 1 part of the zinc chloride mixed solution is sprayed onto 2 parts of the granular material prepared in step (2) to form a first shell layer with a thickness of 39 μm.

[0087] (4) Encapsulation of color-changing agent, glycerin and polyethylene glycol

[0088] 10 parts of red yeast rice, 5 parts of glycerol and 5 parts of PEG600 are added to 85 parts of water in sequence, stirred evenly to form a red yeast rice mixed solution, and 1 part of the red yeast rice mixed solution is sprayed onto 2 parts of the material prepared in step (3) to form a second shell layer with a thickness of 53 μm, thereby obtaining the filter additive of Example 2.

[0089] Example 3

[0090] (1) Preparation of flavored liquid preparations

[0091] First, the peony flowers are dried to a moisture content of less than 5% and crushed, and then 5 parts of peony flower sieves with a mesh size of more than 100 and 5 parts of beta-cyclodextrin are added to 11 parts of water in sequence, and stirred at high speed to prepare a flavor liquid preparation.

[0092] (2) Preparation of aroma-enhancing and moisture-retaining porous granular materials

[0093] 36 parts of commercial carboxymethyl chitosan with a degree of substitution of 1.5 (Nantong Lvshen Bioengineering Co., Ltd.), 7 parts of xylitol, 13 parts of yellow dextrin, 6 parts of baking powder and 23 parts of water are sequentially added into a kneader and stirred evenly, and then naturally allowed to stand at 20-30°C for 50 minutes to fully foam. After the foaming is completed, 13 parts of the flavor liquid preparation prepared in step (1) and 5 parts of sodium dehydroacetate are added and stirred evenly, and then dried at 50-80°C, granulated and sieved to obtain 30-60 mesh particles.

[0094] The BET specific surface area of ​​the product was 26 m 2 / g.

[0095] (3) Encapsulation of metal salts and polyethylene glycol

[0096] 4 parts of aluminum sulfate and 3 parts of PEG200 are added to 34 parts of water in sequence, stirred evenly to form an aluminum sulfate mixed solution, and 1 part of the aluminum sulfate mixed solution is sprayed onto 2 parts of the granular material prepared in step (2) to form a first shell layer with a thickness of 30 μm.

[0097] (4) Encapsulation of color-changing agent, glycerin and polyethylene glycol

[0098] 8 parts of carotene, 5 parts of glycerol and 4 parts of PEG200 are added to 78 parts of water in sequence, stirred evenly to form a carotene mixed solution, and 1 part of the carotene mixed solution is sprayed onto 2 parts of the material prepared in step (3) to form a second shell layer with a thickness of 46 μm, thereby obtaining the filter tip additive of Example 3.

[0099] Comparative Example 1

[0100] The filter tip additive of Comparative Example 1 was obtained by replacing the carboxymethyl chitosan in Example 1 with hydroxypropyl cellulose of the same weight, while other steps were the same as in Example 1.

[0101] Comparative Example 2

[0102] Omit step (3) of Example 1 and directly proceed to step (4) to obtain the filter additive of Comparative Example 2.

[0103] Comparative Example 3

[0104] The baking powder and the foaming process in step (1) of Example 1 are omitted, and the rest is the same as in the example, to obtain the filter tip additive of Comparative Example 3.

[0105] test

[0106] The materials of Examples 1-3 and Comparative Examples 1-3 were added to cigarette filters using transparent tipping paper, respectively, with an addition amount of 30 mg / cigarette, and recorded as Test Cigarettes 1-3 and Comparative Cigarettes 1-3. The cigarette smoking test was conducted on a smoking machine according to the smoking conditions of GB / T 19609-2004 standard, and hydrogen cyanide, crotonaldehyde, ammonia and phenol in cigarette smoke were detected according to relevant standards YCT253-2008, YCT254-2008, YCT377-2017 and YC / T255-2008. The results are shown in Tables 1 and 2.

[0107] Table 1 Results of the release of hydrogen cyanide, crotonaldehyde, ammonia and phenol in mainstream cigarette smoke

[0108]

[0109] Table 2 Reduction rate of release of hydrogen cyanide, crotonaldehyde, ammonia and phenol in mainstream cigarette smoke

[0110] sample Hydrogen cyanide Crotonaldehyde ammonia phenol Test cigarette 1 reduction rate 40.2％ 29.9％ 8.4％ 20.9％ Test cigarette 2 reduction rate 43.6％ 34.7％ 14.5％ 26.6％ Test cigarette 3 reduction rate 47.6％ 37.4％ 12.0％ 29.1％ Compared with cigarette 1, the reduction rate 32.6％ 2.7％ 1.2％ 22.2％ Comparison with cigarette 2 reduction rate 16.9％ 30.6％ 8.4％ 13.9％ Compared with cigarettes 3 reduction rate 25.1％ 10.9％ 3.6％ 15.8％

[0111] In addition, compared with the control cigarettes and the comparison cigarettes, the sensory quality of the test cigarettes 1-3 was improved, and the color of the material particles in the three test cigarettes would change to a certain extent before and after smoking, and the color changes were yellow to dark yellow, red to purple-red, and orange-red to purple.

[0112] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A filter tip additive, characterized in that: The filter additives include: The porous inner core comprises a flavoring agent, carboxymethyl chitosan and a first substrate, wherein the degree of substitution of the carboxymethyl chitosan is less than 2, and the first substrate is selected from any one or more of β-cyclodextrin, white dextrin, yellow dextrin and maltodextrin; a first shell layer, wherein the first shell layer is coated on the surface of the porous core, the first shell layer comprises a metal salt and a second substrate, the metal salt is selected from any one or more of divalent iron salt, trivalent iron salt, divalent zinc salt, and trivalent aluminum salt, and the second substrate is selected from any one or more of polyethylene glycol and triacetin, The filter additive also includes a second shell layer, which is coated on the outer surface of the first shell layer. The second shell layer includes a color-changing agent and a third substrate. The color-changing agent is a natural pigment, and the third substrate is selected from any one or more of polyethylene glycol and triacetin.

2. The filter additive according to claim 1, characterized in that: In parts by weight, the porous inner core comprises 1-10 parts of the flavoring agent, 20-50 parts of the carboxymethyl chitosan and 10-25 parts of the first substrate.

3. The filter additive according to claim 1, characterized in that: The flavoring agent is a plant-derived flavoring agent.

4. The filter additive according to claim 3, characterized in that: The flavoring agent is a floral flavoring agent.

5. The filter additive according to claim 3, characterized in that: The flavoring agent is any one or more of dried chrysanthemum, dried rose, dried peony, and dried lily.

6. The filter additive according to claim 1, characterized in that: The substitution degree of the carboxymethyl chitosan is 0.5-1.

5.

7. The filter additive according to claim 1, characterized in that: The porous inner core also includes a humectant.

8. The filter additive according to claim 7, characterized in that: The humectant is selected from any one or more of sorbitol, xylitol, and maltose oligosaccharide.

9. The filter additive according to claim 7, characterized in that: The weight portion of the humectant is 5-10 parts.

10. The filter additive according to claim 7, characterized in that: The porous inner core also includes any one of the preservatives.

11. The filter additive according to claim 10, characterized in that: The weight portion of the preservative is 1-5 parts.

12. The filter additive according to any one of claims 1 to 11, characterized in that In parts by weight, the first shell layer includes 1-20 parts of the metal salt and 1-20 parts of the second substrate.

13. The filter additive according to claim 1, characterized in that: The polyethylene glycol used as the second base material includes PEG200, PEG400, and PEG600.

14. The filter additive according to claim 1, characterized in that: The thickness of the first shell layer is 0.1-100 μm.

15. The filter additive according to claim 14, characterized in that The thickness of the first shell layer is 20-40 μm.

16. The filter additive according to any one of claims 1 to 11, characterized in that The BET specific surface area of ​​the porous core is 5-50 m 2 / g, and / or the particle size of the porous inner core is 30-60 meshes.

17. The filter additive according to claim 16, characterized in that: The BET specific surface area of ​​the porous core is 15-30 m 2 / g.

18. The filter additive according to any one of claims 1 to 11, characterized in that In parts by weight, the second shell layer includes 1-20 parts of the color-changing agent and 1-10 parts of the third substrate.

19. The filter additive according to claim 1, characterized in that: The color changing agent is selected from any one or more of gardenia yellow, monascus red, and carotene.

20. The filter additive according to claim 1, characterized in that The polyethylene glycol used as the third base material includes PEG200, PEG400, and PEG600.

21. The filter additive according to claim 1, characterized in that The second shell layer further comprises a dispersant, and the dispersant is selected from any one or more of glycerol and propylene glycol.

22. The filter additive according to claim 21, characterized in that The weight portion of the dispersant is 1-10 parts.

23. The filter additive according to any one of claims 1 to 11, characterized in that The thickness of the second shell layer is 0.1-100 μm.

24. The filter additive according to claim 23, characterized in that The thickness of the second shell layer is 30-55 μm.

25. A method for preparing the filter additive according to any one of claims 1 to 24, wherein: The preparation method comprises: Step S1, preparing a liquid flavor mixture including a flavoring agent, at least a portion of a first substrate and water; Step S2, mixing carboxymethyl chitosan, the remaining first substrate, a foaming agent and water and foaming the mixture to obtain a foaming slurry; Step S3, mixing the optional preservative, the foaming slurry and the liquid flavor mixture and granulating the mixture to obtain a porous core; Step S4, preparing a metal salt mixture including a metal salt, a second substrate and water, coating the metal salt mixture on the porous core and drying it to form a first shell layer on the porous core, The preparation method further comprises: preparing a color-changing agent mixture including a color-changing agent, a third substrate, water, and optionally a dispersant; The color-changing agent mixture is coated onto the surface of the first shell layer and dried to form a second shell layer on the surface of the first shell layer.

26. The preparation method according to claim 25, characterized in that: The foaming agent is selected from any one or more of baking powder, dry yeast and sodium bicarbonate.

27. The preparation method according to claim 26, characterized in that: The mass ratio of the baking powder to the carboxymethyl chitosan is 3-8 parts.

28. The preparation method according to claim 25, characterized in that: The step S3 comprises: The foaming slurry and the liquid flavor mixture are mixed, dried, crushed, and sieved to obtain the porous inner core.

29. The preparation method according to claim 28, characterized in that: The drying temperature is 50-80°C.

30. The preparation method according to claim 25, characterized in that: The step S4 comprises: preparing the metal salt mixture comprising the metal salt, the second substrate and the water; The metal salt mixture is coated onto the porous inner core by a spraying process to form a first shell layer on the porous inner core.

31. The preparation method according to any one of claims 25 to 30, characterized in that: The color-changing agent mixture is coated onto the surface of the first shell layer by a spraying process and dried to form a second shell layer on the surface of the first shell layer.

32. A filter tip, comprising a filter tip additive, characterized in that: The filter additive is the filter additive according to any one of claims 1 to 24.

33. A cigarette, comprising a filter tip, characterized in that: The filter is the filter according to claim 32.

34. The cigarette according to claim 33, characterized in that The usage of the filter tip additive is 10mg to 60mg per cigarette.

35. The cigarette according to claim 34, characterized in that The usage of the filter tip additive is 20mg-40mg per cigarette.

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