Preparation method of mouth mask containing cooling agent for cigarette as well as product and application of mouth mask

Abstract

The invention provides a preparation method of a cooling agent-containing mouth mask for cigarettes as well as a product and application thereof. The preparation method comprises the following steps: (1) mixing polysaccharide, a cooling agent and an oxalic acid aqueous solution to obtain a mixed solution; mixing the protein composition with water to obtain a protein solution; and (2) mixing the mixed solution, the protein solution and an auxiliary agent, carrying out ultrasonic degassing treatment, putting into a mold, and drying to obtain the cooling agent-containing mouth film for cigarettes. According to the preparation method disclosed by the invention, through the matching of specific raw materials, the film-forming property of the polysaccharide, the flexibility after film formation and other mechanical properties are improved, the protein loading capacity of the polysaccharide is improved, and the cooling agent is added, so that the final mouth film not only has excellent mechanical properties, but also can provide a cool feeling for cigarettes after being used for the cigarettes.

Description

Technical Field

[0001] The invention belongs to the technical field of cigarettes, and particularly relates to a preparation method of a mouth mask for cigarettes containing a cooling agent, and a product and application thereof. Background Art

[0002] Bio-based degradable materials, as new materials from renewable biomass, are easier to decompose / degrade, making them more environmentally friendly and without causing environmental pollution. Using bio-based materials to replace traditional petroleum-based plastic materials can also give them corresponding basic mechanical properties. Therefore, their application value in the tobacco packaging industry is becoming increasingly prominent.

[0003] WO2023113520A1 discloses a biodegradable film for tobacco packaging, comprising: a first film layer applied so that one surface faces the tobacco product; a third film layer applied so that one surface is exposed to the outside; and a second film layer positioned between the first and third film layers. In the biodegradable film, the first, second, and third film layers are each composed of a different composition, and at least one of the first, second, and third film layers contains a biodegradable material. The biodegradable film has a biodegradation rate of 90% or higher after 60 days, and the coefficient of kinetic friction of its outer surface is 0.3 or less.

[0004] CN216220205U discloses a tobacco wrapping paper and a heat-not-burn electronic cigarette. The tobacco wrapping paper comprises a first wrapping paper, a PLA film, and a second wrapping paper arranged sequentially from top to bottom; an adhesive is applied between the first wrapping paper and the PLA film; and an adhesive is applied between the PLA film and the second wrapping paper. By inserting a layer of PLA film between the wrapping papers, the PLA film's excellent heat resistance allows for a cooling effect. Furthermore, the PLA film's excellent leakage-proofing properties prevent tobacco oil from leaking out and causing yellowing in the pipe, significantly improving the shelf life of the cigarette. Furthermore, the adhesive applied between the first wrapping paper and the PLA film, as well as between the PLA film and the second wrapping paper, uses environmentally friendly glue that is food-grade and safer. Furthermore, the PLA film used is biodegradable, further enhancing environmental protection.

[0005] Current application technologies for biodegradable materials primarily focus on their environmentally friendly properties, while underexploring advantages such as their intelligent responsiveness and active ingredient loading capacity. Targeting the tobacco industry's needs, by incorporating the multifunctional loading properties of biodegradable materials, consumers can experience a greater cooling sensation, significantly expanding their application in areas such as cigarette filters and tobacco films. This technology aligns with green manufacturing trends while enhancing product value through functional integration, demonstrating clear technical feasibility and industrialization prospects. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the object of the present invention is to provide a method for preparing a mouth mask for cigarettes containing a cooling agent, as well as a product and application thereof.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a method for preparing a mouth mask for cigarettes containing a cooling agent, the preparation method comprising:

[0009] (1) mixing a polysaccharide, a cooling agent and an aqueous solution of oxalic acid to obtain a mixed solution;

[0010] mixing the protein composition with water to obtain a protein solution;

[0011] (2) The mixed solution, the protein solution and the auxiliary agent are mixed, subjected to ultrasonic degassing treatment, and then placed into a mold. After drying, the cigarette mouth mask containing the cooling agent is obtained.

[0012] The raw materials used in the preparation method of the present invention are polysaccharides and proteins, both of which are macromolecules necessary for life activities, are hydrophilic and degradable, wherein the polysaccharide has film-forming properties, and the protein composition contains a large number of amino acids, and the hydrogen bonds and hydrophobic bonds formed between molecules can increase the feasibility of film formation. In addition, the insoluble protein in tobacco can be used as the wall material of the delivery carrier, providing a carrying space for functional active ingredients. The method of the present invention generates a network structure by reacting polysaccharides and proteins, and then adds auxiliary agents to improve its film-forming properties and mechanical properties such as flexibility after film formation. By adding a cooling agent, the final mouth mask can not only have antibacterial and antioxidant activities, but also provide a stable cooling feeling to cigarettes after being used in cigarettes.

[0013] Preferably, the polysaccharide in step (1) comprises any one of chitosan, gum arabic, calcium alginate or modified starch, or a combination of at least two thereof.

[0014] Preferably, the polysaccharide is chitosan, gum arabic, calcium alginate and modified starch.

[0015] The polysaccharide of the present invention adopts the above combination, so that the final oral mask has good flexibility, film-forming properties and air permeability, and can also absorb tar and nicotine, thereby reducing the impurities and irritation in the smoke.

[0016] Preferably, the mass ratio of chitosan, gum arabic, calcium alginate and modified starch is (4-5):(0.5-1.5):(1-2):(2-3).

[0017] Among them, "4-5" can be 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8 or 4.9, etc.;

[0018] “0.5-1.5” can mean 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3 or 1.4, etc.;

[0019] "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0020] “2-3” can be 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8 or 2.9, etc.

[0021] Preferably, the volume concentration of the oxalic acid aqueous solution is 0.5-3%, for example, it can be 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5% or 2.8%.

[0022] Preferably, the material-liquid ratio of the polysaccharide to the aqueous oxalic acid solution is 0.01-0.05 g / mL, for example, 0.015 g / mL, 0.02 g / mL, 0.03 g / mL, 0.04 g / mL or 0.045 g / mL.

[0023] Preferably, the temperature for mixing the polysaccharide and the aqueous oxalic acid solution in step (1) is 20-30°C, for example, 21°C, 23°C, 25°C, 27°C or 29°C.

[0024] Preferably, the mixing is carried out in a stirring manner, the stirring speed is 500-800 rpm (for example, 550 rpm, 600 rpm, 650 rpm, 700 rpm or 750 rpm, etc.), and the time is 1.5-3 h (for example, 1.6 h, 1.8 h, 2 h, 2.2 h, 2.5 h, 2.7 h or 2.9 h, etc.).

[0025] Preferably, the cooling agent in step (1) comprises any one or a combination of at least two of DL-menthol, menthyl lactate, L-menthone, 1,8-cineole, methyl salicylate or limonene.

[0026] Preferably, the cooling agents are DL-menthol and 1,8-cineole.

[0027] As a preferred technical solution of the present invention, the combination of DL-menthol and 1,8-cineole can combine the cooling effect of menthol with the camphor-like aroma of cineole, producing a more complex and long-lasting cooling aroma, enhancing the consumer experience. Furthermore, the two may promote each other's volatilization, prolonging the duration of the cooling sensation.

[0028] Preferably, the mass ratio of DL-menthol to 1,8-cineole is 1:(0.5-1), for example, it can be 1:0.55, 1:0.6, 1:0.65, 1:0.7, 1:0.75, 1:0.8, 1:0.85, 1:0.9 or 1:0.95.

[0029] Preferably, the mass ratio of the polysaccharide to the cooling agent is 1:(0.1-0.5), for example, it can be 1:0.1, 1:0.2, 1:0.3, 1:0.4 or 1:0.5, etc.

[0030] Preferably, the protein composition in step (1) comprises a combination of at least two of tobacco protein, zein or soy protein isolate.

[0031] Preferably, the protein composition is tobacco protein, zein and soy protein isolate.

[0032] The tobacco protein, zein and soy protein isolate described in the present invention work synergistically to not only increase the hydrophilicity of the polysaccharide complex membrane and improve the structure and texture of the oral membrane, but also generate aroma substances such as pyrazines and furans when heated, thereby enhancing the aroma quality of the smoke.

[0033] Preferably, the mass ratio of the tobacco protein, zein and soy protein isolate is (2-5):(0.1-1):(1-2).

[0034] Wherein "2-5" can be 2.2, 2.5, 2.8, 3, 3.2, 3.5, 3.8, 4, 4.2, 4.5 or 4.8, etc.;

[0035] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.;

[0036] “1-2” can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.

[0037] The preparation method of tobacco protein of the present invention comprises:

[0038] (1) Tobacco raw materials (waste tobacco leaves and tobacco stems) are dried, then degreased using isopropyl alcohol and ethyl acetate in a Soxhlet extractor, dried again, mixed with purified water, and pH adjusted using a saturated citric acid solution. Water extraction is then performed to obtain an extract, and the supernatant is collected after centrifugation.

[0039] (2) concentrating the supernatant to obtain a concentrate, adding the concentrate to anhydrous ethanol for alcohol extraction, and then centrifuging the extract to collect the precipitate;

[0040] (3) mixing the precipitate with water, dialyzing the mixture using a dialysis bag, collecting the retentate in the dialysis bag and freeze-drying the mixture, and grinding the dried powder to obtain a tobacco extract;

[0041] (4) dissolving tobacco extract and flavors (geraniol, linalool, and cinnamyl alcohol) in an ethanol aqueous solution, stirring to fully dissolve the two, and then mixing with a polylactic acid aqueous solution. After fully stirring, the ethanol is removed by rotary evaporation, and then the sample is centrifuged to remove large particles. The supernatant is freeze-dried to obtain the tobacco protein particles.

[0042] Preferably, the material-liquid ratio of the protein composition to water is 0.01-0.05 g / mL, for example, 0.015 g / mL, 0.02 g / mL, 0.03 g / mL, 0.04 g / mL or 0.045 g / mL.

[0043] Preferably, the step of mixing the protein composition with water in step (1) comprises: stirring the protein composition and water at 20-30°C (for example, 21°C, 23°C, 25°C, 27°C or 29°C) and a speed of 200-300 rpm (for example, 210 rpm, 230 rpm, 250 rpm, 270 rpm or 290 rpm) for 50-70 min (for example, 52 min, 55 min, 58 min, 60 min, 62 min, 65 min) n or 68min, etc.), then heat to 65-80°C (for example, 66°C, 68°C, 70°C, 72°C, 75°C, 77°C or 79°C, etc.) and stir at a speed of 800-1200rpm (for example, 950rpm, 900rpm, 1000rpm, 1100rpm or 1150rpm, etc.) for 15-30min (for example, 16min, 18min, 20min, 22min, 25min, 27min or 29min, etc.).

[0044] Preferably, the mass ratio of the mixed solution, protein solution and auxiliary agent in step (2) is (1-2):(0.5-1.5):(0.1-1).

[0045] Wherein "1-2" can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9, etc.;

[0046] “0.5-1.5” can mean 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3 or 1.4, etc.;

[0047] “0.1-1” can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0048] Preferably, the auxiliary agent in step (2) includes any one of propylene glycol, polycaprolactone, and hydroxypropyl methylcellulose, or a combination of at least two thereof.

[0049] Preferably, the auxiliary agents are propylene glycol and hydroxypropyl methylcellulose.

[0050] In the preparation method of the present invention, propylene glycol and hydroxypropyl methylcellulose are selected as auxiliary agents. Both contain a large number of active groups. Their synergistic combination can increase the hydrogen bonding effect between polymers, increase the chain segment mobility, and reduce the brittleness of the material, thereby significantly improving the flexibility and tensile strength of the final oral mask.

[0051] Preferably, the mass ratio of propylene glycol to hydroxypropyl methylcellulose is 1:(0.1-0.5), for example, it can be 1:0.15, 1:0.2, 1:0.25, 1:0.3, 1:0.35, 1:0.4 or 1:0.45, etc.

[0052] Preferably, the mold is a polytetrafluoroethylene mold.

[0053] Preferably, the drying temperature is 35-45° C. and the drying time is 10-15 hours.

[0054] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0055] In a second aspect, the present invention provides a mouth mask for cigarettes containing a cooling agent, wherein the mouth mask for cigarettes containing a cooling agent is prepared by the preparation method described in the first aspect.

[0056] In a third aspect, the present invention provides a use of the mouth mask for cigarettes containing a cooling agent according to the second aspect in the preparation of cigarettes.

[0057] One application method of the polysaccharide oral mask of the present invention is: by wrapping the oral mask outside the cigarette tipping paper, consumers can touch the oral mask during the cigarette smoking process and experience a cool feeling.

[0058] Another application method is to wrap the filter element with an oral membrane, and then wrap the tipping paper around the oral membrane. Consumers can experience a cool sensation by slowly releasing a cool aroma through the oral membrane during cigarette smoking.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The preparation method of the present invention improves the film-forming property and mechanical properties such as flexibility after film formation by modifying the polysaccharide, and improves its protein loading capacity. By adding a cooling agent, the final oral film not only has excellent mechanical properties but also can provide a cooling sensation to cigarettes after being used in cigarettes. DETAILED DESCRIPTION

[0061] The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the embodiments are merely to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0062] The zein of the present invention was purchased from Shanghai MacLean Biochemical Reagent Technology Co., Ltd.

[0063] The soy protein isolate was purchased from Shansong Biological Products Co., Ltd.

[0064] The tobacco protein was prepared using the method of Preparation Example 1 below.

[0065] The rest of the raw materials involved can be used as long as they are purchased from regular dealers.

[0066] Preparation Example 1

[0067] This preparation example provides a tobacco protein particle, and the preparation method of the tobacco protein particle is as follows:

[0068] (1) Tobacco raw material (waste tobacco leaves and tobacco stems in a mass ratio of 1:0.5) was dried and then degreased with isopropyl alcohol and ethyl acetate in a mass ratio of 1:2.5 (the amount was 1 times the mass of the tobacco raw material) at 90°C using a Soxhlet extractor for 2 h. The extract was then dried again and mixed with purified water in a mass ratio of 1:28. The pH was adjusted to 2.5 using a saturated citric acid solution. The extract was then extracted at 88°C for 4 h to obtain an extract. The extract was centrifuged at 4000g and 4°C for 15 min and the supernatant was collected.

[0069] (2) The supernatant was concentrated at 48°C to 25% of the original volume to obtain a concentrate. Anhydrous ethanol (2.5 times the volume of the concentrate) was added to the concentrate and extracted at 4°C for 10 h. The extract was then centrifuged at 3500 g and 3°C for 15 min to collect the precipitate.

[0070] (3) The precipitate was mixed with water at a mass ratio of 1:18, and dialyzed using a 2500 Da dialysis bag at 30°C for 6 h with the water changed every 2 h. The retentate in the dialysis bag was collected and freeze-dried, and the dried powder was ground to obtain the tobacco extract;

[0071] (4) The tobacco extract and the essence (geraniol, linalool and cinnamyl alcohol in a mass ratio of 4:1:2) were dissolved in an 85% (v / v) ethanol aqueous solution (the material-liquid ratio to the tobacco extract was 0.15 g / mL) in a mass ratio of 1:0.6, stirred to fully dissolve the two, and then mixed with a polylactic acid aqueous solution (concentration of 0.3 g / mL) (the amount was 3.5 times that of the ethanol aqueous solution). After sufficient stirring, the ethanol was removed by rotary evaporation (40°C, -0.1 MPa), and then the sample was centrifuged to remove large particles. The supernatant was freeze-dried to obtain the tobacco protein particles.

[0072] Example 1

[0073] This embodiment provides a cigarette mouth mask containing a cooling agent. The preparation method of the cigarette mouth mask containing a cooling agent is as follows:

[0074] (1) Polysaccharide (chitosan, gum arabic, calcium alginate and modified starch in a mass ratio of 9:2:3:5) was dissolved in a 1% (v / v) aqueous solution of oxalic acid at a material-liquid ratio of 0.02 g / mL, and a cooling agent (0.3 times the amount of the polysaccharide) was added. The cooling agent was DL-menthol and 1,8-cineole in a mass ratio of 1:0.8. The mixture was then placed in a constant temperature water bath at 25°C and stirred continuously at 600 rpm for 2 h until it was completely dissolved. Stirring was continued for 20 min to obtain a mixed solution.

[0075] (2) The protein composition (tobacco protein, zein, and soy protein isolate in a mass ratio of 8:1:3) was added to distilled water at a material-liquid ratio of 0.02 g / mL, stirred and hydrated at 30°C and 250 rpm for 60 min, then transferred to a constant temperature water bath, heated to 70°C, and continuously stirred at a speed of 1000 rpm for 20 min to obtain a protein solution;

[0076] (3) The mixed solution, protein solution and auxiliary agent (propylene glycol and hydroxypropyl methylcellulose with a mass ratio of 10:3) were mixed in a mass ratio of 3:2:1, stirred thoroughly, and then ultrasonically degassed for 20 minutes. Finally, the mixture was poured into a 10 cm × 10 cm × 0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. The mixture was then dried in an oven at 40±2°C for 12 hours to form a film, thereby obtaining the cigarette mouth mask containing the cooling agent.

[0077] Example 2

[0078] This embodiment provides a cigarette mouth mask containing a cooling agent. The preparation method of the cigarette mouth mask containing a cooling agent is as follows:

[0079] (1) Polysaccharide (chitosan, gum arabic, calcium alginate and modified starch in a mass ratio of 5:0.5:2:2) was dissolved in a 1.5% (v / v) aqueous solution of oxalic acid at a material-liquid ratio of 0.01 g / mL, and a cooling agent (0.2 times the amount of polysaccharide) was added. The cooling agent was DL-menthol and 1,8-cineole in a mass ratio of 1:1.

[0080] Then, the mixture was placed in a constant temperature water bath at 20°C and stirred continuously at 800 rpm for 1.5 h until it was completely dissolved, and then stirred for 20 min to obtain a mixed solution;

[0081] (2) The protein composition (tobacco protein, zein, and soy protein isolate in a mass ratio of 2:1:1) was added to distilled water at a material-liquid ratio of 0.01 g / mL, stirred and hydrated at 20°C and 300 rpm for 70 min, then transferred to a constant temperature water bath, heated to 80°C, and continuously stirred at 800 rpm for 15 min to obtain a protein solution;

[0082] (3) The mixed solution, protein solution and auxiliary agent (propylene glycol and hydroxypropyl methylcellulose in a mass ratio of 10:2) were mixed in a mass ratio of 4:1:2, stirred thoroughly, and then ultrasonically degassed for 25 minutes. Finally, the mixture was poured into a 10 cm × 10 cm × 0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. The mixture was then dried in an oven at 38±2°C for 14 hours to form a film, thereby obtaining the cigarette mouth mask containing the cooling agent.

[0083] Example 3

[0084] This embodiment provides a cigarette mouth mask containing a cooling agent. The preparation method of the cigarette mouth mask containing a cooling agent is as follows:

[0085] (1) Polysaccharide (chitosan, gum arabic, calcium alginate and modified starch in a mass ratio of 4:1.5:1:3) was dissolved in a 2.5% (v / v) aqueous solution of oxalic acid at a material-liquid ratio of 0.05 g / mL, and a cooling agent (0.4 times the amount of the polysaccharide) was added, which was DL-menthol and 1,8-cineole in a mass ratio of 1:0.1. The mixture was then placed in a constant temperature water bath at 30°C and stirred continuously at 500 rpm for 3 h until it was completely dissolved, and then stirred for 20 min to obtain a mixed solution;

[0086] (2) The protein composition (tobacco protein, zein, and soy protein isolate in a mass ratio of 5:1:2) was added to distilled water at a material-liquid ratio of 0.05 g / mL, stirred and hydrated at 30°C and 200 rpm for 50 min, then transferred to a constant temperature water bath, heated to 75°C, and continuously stirred at a speed of 1200 rpm for 25 min to obtain a protein solution;

[0087] (3) The mixed solution, protein solution and auxiliary agent (propylene glycol and hydroxypropyl methylcellulose in a mass ratio of 2:1) were mixed in a mass ratio of 1:1.5:0.3, stirred thoroughly, and then ultrasonically degassed for 20 minutes. Finally, the mixture was poured into a 10 cm × 10 cm × 0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. The mixture was then dried in an oven at 43±2°C for 10 hours to form a film, thereby obtaining the cigarette mouth mask containing the cooling agent.

[0088] Example 4

[0089] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the polysaccharide in step (1) is gum arabic, calcium alginate, and modified starch in a mass ratio of 2:3:5, and the amount of polysaccharide is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0090] Example 5

[0091] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the polysaccharide in step (1) is chitosan, calcium alginate, and modified starch in a mass ratio of 9:3:5, and the amount of polysaccharide is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0092] Example 6

[0093] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the polysaccharide in step (1) is chitosan, gum arabic, and modified starch in a mass ratio of 9:2:5, and the amount of polysaccharide is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0094] Example 7

[0095] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the polysaccharide in step (1) is chitosan, gum arabic, and calcium alginate in a mass ratio of 9:2:3, and the amount of polysaccharide is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0096] Example 8

[0097] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the cooling agent in step (1) is DL-menthol and the amount of the cooling agent is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0098] Example 9

[0099] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the cooling agent in step (1) is 1,8-cineole and the amount of the cooling agent is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0100] Example 10

[0101] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the protein composition in step (2) is composed of zein and soy protein isolate in a mass ratio of 1:3, and the amount of the protein composition is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0102] Example 11

[0103] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the protein composition in step (2) is tobacco protein and soy protein isolate in a mass ratio of 8:3, and the amount of the protein composition is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0104] Example 12

[0105] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the protein composition in step (2) is tobacco protein and zein in a mass ratio of 8:1, and the amount of the protein composition is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0106] Example 13

[0107] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the auxiliary agent in step (3) is propylene glycol, and the amount of the auxiliary agent is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0108] Example 14

[0109] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the auxiliary agent in step (3) is hydroxypropyl methylcellulose, and the amount of the auxiliary agent is kept unchanged. The remaining steps and process parameters are the same as those of Example 1.

[0110] Example 15

[0111] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the mass ratio of the mixed solution, protein solution, and auxiliary agent in step (3) is 1:2:1, and the remaining steps and process parameters are the same as those of Example 1.

[0112] Example 16

[0113] This embodiment provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that the mass ratio of the mixed solution, protein solution, and auxiliary agent in step (3) is 6:1:3, and the remaining steps and process parameters are the same as those of Example 1.

[0114] Comparative Example 1

[0115] This comparative example provides a cigarette mouth mask containing a cooling agent, and the preparation method thereof is as follows:

[0116] The polysaccharide (chitosan, gum arabic, calcium alginate and modified starch in a mass ratio of 9:2:3:5) was dissolved in a 1% (v / v) aqueous solution of oxalic acid at a material-liquid ratio of 0.02 g / mL, and then a cooling agent (0.3 times the amount of the polysaccharide), a protein composition (0.67 times the amount of the polysaccharide) and an adjuvant (0.33 times the amount of the polysaccharide) were added. The mixture was then placed in a constant temperature water bath at 25°C and stirred continuously at a speed of 600 rpm for 2 hours until it was completely dissolved. The mixture was stirred for 20 minutes to obtain a mixed solution, which was then ultrasonically degassed for 20 minutes. The mixture was finally poured into a 10 cm×10 cm×0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. The mixture was then dried in an oven at 40±2°C for 12 hours to form a film to obtain the cigarette mouth mask containing the cooling agent.

[0117] The cooling agent is DL-menthol and 1,8-cineole in a mass ratio of 1:0.8;

[0118] The protein composition comprises tobacco protein, zein and soy protein isolate in a mass ratio of 8:1:3;

[0119] The auxiliary agent is propylene glycol and hydroxypropyl methylcellulose in a mass ratio of 10:3.

[0120] Comparative Example 2

[0121] This comparative example provides a mouth mask for cigarettes. The difference between its preparation method and that of Example 1 is that no cooling agent is added in step (1). That is, the original step (1) is changed to:

[0122] Polysaccharides (chitosan, gum arabic, calcium alginate, and modified starch in a mass ratio of 9:2:3:5) were dissolved in a 1% (v / v) oxalic acid aqueous solution at a material-liquid ratio of 0.02 g / mL. The mixture was then placed in a 25°C constant temperature water bath and stirred continuously at 600 rpm for 2 h until completely dissolved. Stirring was continued for 20 min to obtain a mixed solution.

[0123] The remaining steps and process parameters are consistent with those in Example 1.

[0124] Comparative Example 3

[0125] This comparative example provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that no auxiliary agent is added in step (3), that is, step (3) is:

[0126] The mixed solution and the protein solution were mixed in a mass ratio of 3:2, stirred thoroughly, and then ultrasonically degassed for 20 minutes. Finally, the mixture was poured into a 10 cm × 10 cm × 0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. The mixture was then dried in an oven at 40±2° C. for 12 hours to form a film, thereby obtaining the cigarette mouth mask containing the cooling agent.

[0127] The remaining steps and process parameters are consistent with those in Example 1.

[0128] Comparative Example 4

[0129] This comparative example provides a mouth mask for cigarettes containing a cooling agent. The preparation method thereof differs from that of Example 1 only in that step (2) is not included, i.e., the original step (3) is changed to:

[0130] The mixed solution and the auxiliary agent (propylene glycol and hydroxypropyl methylcellulose in a mass ratio of 10:3) are mixed in a mass ratio of 3:1, stirred thoroughly, and then ultrasonically degassed for 20 minutes. Finally, the mixture is poured into a 10 cm × 10 cm × 0.2 cm polytetrafluoroethylene mold to allow it to flow evenly. Subsequently, the mixture is dried in an oven at 40±2°C for 12 hours to form a film, thereby obtaining the cigarette mouth mask containing the cooling agent.

[0131] The remaining steps and process parameters are consistent with those in Example 1.

[0132] Test Example 1

[0133] Test Example 1 Sensory Quality

[0134] Test cigarettes were prepared by wrapping the filter rods (outside the tipping paper) of finished cigarettes without any flavoring or sweetening ingredients with the cigarette masks obtained in Examples 1-16 and Comparative Examples 1-4. Finished cigarettes without any flavoring or sweetening ingredients served as controls. Both test and control cigarettes were subjected to sensory quality testing according to national standards.

[0135] Thirteen expert smokers were organized to conduct sensory scoring of the various indicators of the cigarettes obtained above in accordance with GB5606.4-2005 "Cigarettes Part 4: Sensory Technical Requirements". The specific definitions of the sensory quality evaluation indicators are shown in Table 1, the scoring standards are shown in Table 2, and the scoring results are shown in Table 3 (the average value of each group is taken, and one decimal place is retained).

[0136] Table 1

[0137]

[0138] Table 2

[0139]

[0140]

[0141] Table 3

[0142]

[0143] As can be seen from Table 3, compared with the control cigarettes, the cigarettes wrapped with the oral masks obtained in Examples 1-3 of the present invention can make the cigarettes have stronger aroma and cool feeling, better harmony and taste, and lower indicators such as foreign smell and irritation.

[0144] As can be seen from Examples 8-9 and Comparative Example 2, when a cooling agent is added during the preparation of the oral mask, and the cooling agent is DL-menthol and 1,8-cineole selected in the present invention, the cooling sensation after the cigarette is wrapped in the oral mask is better, and DL-menthol and 1,8-cineole have a synergistic effect in enhancing the cooling sensation;

[0145] It can be seen from Examples 10-12 and Comparative Example 4 that the harmony of the oral mask can be improved only when a protein composition is added during the preparation of the oral mask, and the protein composition is tobacco protein, zein and soy protein isolate as defined in the present invention.

[0146] Test Example 2

[0147] The cigarette mouth masks obtained in Examples 1-7, 13-16 and Comparative Examples 1-4 were tested for flexibility and air permeability.

[0148] The flexibility was measured in accordance with GB / T1731-1993. The air permeability was measured five times using a GTR-704R cigarette paper air permeability tester and the average value was taken. The results are shown in Table 4.

[0149] Table 4

[0150]

[0151] As shown in Table 4, the oral mask for cigarettes obtained by the method of the present invention not only has better flexibility but also has excellent air permeability.

[0152] It can be seen from Examples 4-7 and Comparative Example 2 that the addition of polysaccharides and the selection of their types have an impact on the flexibility and air permeability of the oral mask.

[0153] It can be seen from Examples 13-14 and Comparative Example 1 that only when the auxiliary agent is the combination of propylene glycol and hydroxypropyl methylcellulose selected in the present invention can the flexibility of the oral mask be improved.

[0154] The applicant declares that the present invention uses the above-described embodiments to illustrate the preparation method of a mouth mask for cigarettes containing a cooling agent, the product thereof, and its application. However, the present invention is not limited to the above-described detailed method, nor does it imply that the present invention must rely on the above-described detailed method for implementation. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of various raw materials in the product of the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A method for preparing a mouth mask for cigarettes containing a cooling agent, characterized in that: The preparation method comprises: (1) mixing a polysaccharide, a cooling agent and an aqueous solution of oxalic acid to obtain a mixed solution; mixing the protein composition with water to obtain a protein solution; (2) The mixed solution, the protein solution and the auxiliary agent are mixed, subjected to ultrasonic degassing treatment, and then placed into a mold, and dried to obtain the cigarette mouth mask containing the cooling agent.

2. The preparation method according to claim 1, characterized in that The polysaccharide in step (1) comprises any one of chitosan, gum arabic, calcium alginate or modified starch, or a combination of at least two thereof; Preferably, the polysaccharide is chitosan, gum arabic, calcium alginate and modified starch; Preferably, the volume concentration of the oxalic acid aqueous solution is 1-10%; Preferably, the solid-liquid ratio of the polysaccharide to the oxalic acid aqueous solution is 0.01-0.05 g / mL.

3. The preparation method according to claim 1 or 2, characterized in that The temperature of mixing the polysaccharide and the oxalic acid aqueous solution in step (1) is 20-30° C.; Preferably, the mixing is carried out in a stirring manner, the stirring speed is 500-800 rpm, and the time is 1.5-3 hours; Preferably, the cooling agent in step (1) comprises any one or a combination of at least two of DL-menthol, menthyl lactate, L-menthone, 1,8-cineole, methyl salicylate or limonene; Preferably, the cooling agent is DL-menthol and 1,8-cineole; Preferably, the mass ratio of the polysaccharide to the cooling agent is 1:(0.1-0.5).

4. The preparation method according to any one of claims 1 to 3, characterized in that The protein composition in step (1) comprises a combination of at least two of tobacco protein, zein or soy protein isolate; Preferably, the protein composition is tobacco protein, zein and soy protein isolate; Preferably, the material-to-liquid ratio of the protein composition to water is 0.01-0.05 g / mL.

5. The preparation method according to any one of claims 1 to 4, characterized in that The step (1) of mixing the protein composition with water comprises: stirring the protein composition and water at 200-30° C. and 200-300 rpm for 50-70 min, then heating to 65-80° C. and stirring at 800-1200 rpm for 15-30 min.

6. The preparation method according to any one of claims 1 to 5, characterized in that The mass ratio of the mixed solution, protein solution and auxiliary agent in step (2) is (1-2):(0.5-1.5):(0.1-1).

7. The preparation method according to any one of claims 1 to 6, characterized in that The auxiliary agent in step (2) includes any one of propylene glycol, polycaprolactone or hydroxypropyl methylcellulose or a combination of at least two thereof; Preferably, the auxiliary agents are propylene glycol and hydroxypropyl methylcellulose.

8. The preparation method according to any one of claims 1 to 7, characterized in that The mold is a polytetrafluoroethylene mold; Preferably, the drying temperature is 35-45° C. and the drying time is 10-15 hours.

9. A mouth mask for cigarettes containing a cooling agent, characterized in that: The cigarette mouth mask containing the cooling agent is prepared by the preparation method according to any one of claims 1 to 8.

10. Use of the mouth mask for cigarettes containing a cooling agent according to claim 9 in the preparation of cigarettes.

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