Preparation method of aerosol generating substrate and aerosol generating product

Abstract

The embodiment of the invention provides a preparation method of an aerosol generating substrate and an aerosol generating product, and according to the preparation method of the aerosol generating substrate provided by the embodiment of the invention, a konjak coagulum prepared by adopting pre-freezing treatment, freeze drying and coagulation treatment is uniform in internal structure, and is not easy to deform; the subsequent uniform loading of tobacco extracts, flavors and fragrances, smoke agents and nicotine agents is facilitated; and the konjak coagulum is sequentially subjected to softening treatment, pre-freezing and freeze-drying treatment, so that the flexibility of the prepared konjak sponge can be further improved, and the konjak sponge is not easy to crack. Therefore, the aerosol generating base prepared on the basis of the konjak sponge in the embodiment of the invention can have both structural uniformity and flexibility and flat and smooth surface, and the problem that an existing aerosol generating product prepared from konjak gulcomannan is relatively stiff, so that the aerosol amount stability is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and particularly to a method for preparing an aerosol generation matrix and an aerosol generation article. Background Art

[0002] With the improvement of consumers' health awareness, the tobacco industry has continuously responded to the upgrading of consumers' demands and accelerated the R & D and promotion of new tobacco products. Among them, the heat-not-burn aerosol generation technology has been widely regarded as the hope and direction for the sustainable development of the tobacco industry.

[0003] In the heat-not-burn aerosol generation technology, an aerosol generation article is placed in an aerosol generation device, so that the aerosol generation article is heated to generate an aerosol.

[0004] However, in the related art, the aerosol generation matrix in the aerosol generation article is relatively rigid and its organizational structure is uneven, resulting in poor stability of the aerosol amount. Summary of the Invention

[0005] The technical problem to be solved by the present application is to provide a method for preparing an aerosol generation matrix and an aerosol generation article, so as to improve the problem that the matrix of the existing aerosol generation article is relatively rigid, resulting in poor stability of the aerosol amount.

[0006] In order to improve the above problems, the present application is realized by the following technical solutions:

[0007] The present application provides a method for preparing an aerosol generation matrix, which includes:

[0008] Obtaining konjac coagulum: subjecting an aqueous solution of konjac glucomannan to pre-freezing, freeze-drying and coagulation treatment in sequence to obtain the konjac coagulum;

[0009] Obtaining konjac sponge: subjecting the konjac coagulum to softening treatment, pre-freezing and freeze-drying treatment in sequence to obtain the konjac sponge;

[0010] Loading an aerosol generation material on the konjac sponge, the aerosol generation material including at least one of a tobacco extract, a flavor and fragrance, a fuming agent, and a nicotine agent, to obtain an aerosol generation matrix.

[0011] Further, in the preparation method, in the aqueous solution of konjac glucomannan, the mass fraction of konjac glucomannan is 0.5% to 2%.

[0012] Further, in the preparation method, the treatment temperature of the pre-freezing is -15°C to -25°C, and the treatment duration is 12h to 48h;

[0013] The treatment temperature for freeze-drying is -20°C to -70°C, and the treatment duration is 24h to 60h.

[0014] Further, in the preparation method, in the obtained konjac coagulum, the coagulation treatment includes:

[0015] Placing the freeze-dried product in an alkaline solution for the coagulation treatment.

[0016] Further, in the preparation method, the alkaline solution includes one or more of sodium hydroxide, sodium bicarbonate, ammonium bicarbonate, potassium bicarbonate, and light calcium carbonate; and / or

[0017] The mass fraction of the alkaline solution is 0.5% to 10%; the treatment temperature for the coagulation treatment is 20°C to 50°C, and the treatment duration is 2h to 10h.

[0018] Further, in the preparation method, in the obtained konjac sponge, the softening treatment includes:

[0019] Placing the konjac coagulum in an aqueous glycerol solution for the softening treatment.

[0020] Further, in the preparation method, the concentration of the aqueous glycerol solution is 0.5wt% to 5.0wt%;

[0021] The treatment temperature for the softening treatment is 20 to 30°C, and the treatment duration is 2h to 10h.

[0022] Further, in the preparation method, the konjac glucomannan is obtained by the following method:

[0023] After soaking konjac powder in water, treating it with acetic acid and amylase, taking the precipitate and drying it to obtain the konjac glucomannan.

[0024] Further, in the preparation method, in loading the aerosol-generating material on the konjac sponge, it includes:

[0025] By means of dip coating, coating the coating solution on the konjac sponge and then drying it. The coating solution includes the aerosol-generating material, and the mass of the coating solution is 10 to 30 times the mass of the konjac sponge; and / or

[0026] The porosity of the konjac sponge is 70% to 90%.

[0027] This application also provides an aerosol-generating article, including a smoking section, and the smoking section includes an aerosol-generating substrate prepared by the above-mentioned preparation method.

[0028] Compared with the prior art, the embodiments of this application have the following advantages:

[0029] In the embodiments of the present application, in the preparation method of the aerosol - generating matrix and the aerosol - generating article provided, first, an aqueous solution of konjac glucomannan is subjected to pre - freezing, freeze - drying, and solidification treatments in sequence, and then the obtained konjac solidified matter is subjected to softening treatment, pre - freezing, and freeze - drying treatments in sequence. Then, an aerosol - generating material including at least one of a tobacco extract, flavoring, a smoke - generating agent, and a nicotine agent is loaded on the obtained konjac sponge to obtain the aerosol - generating matrix. Among them, the internal structure of the konjac solidified matter prepared by pre - freezing, freeze - drying, and solidification treatments is uniform, facilitating the uniform loading of the subsequent tobacco extract, flavoring, smoke - generating agent, and nicotine agent; and subjecting the konjac solidified matter to softening treatment, pre - freezing, and freeze - drying treatments in sequence can further improve the flexibility of the prepared konjac sponge, making it less likely to crack. Therefore, the aerosol - generating matrix prepared based on this konjac sponge in the embodiments of the present application can have both structural uniformity and flexibility and a smooth surface, improving the problem that the matrix of the existing aerosol - generating article is too rigid, resulting in poor stability of the aerosol amount.

[0030] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flowchart of the preparation method of the aerosol - generating matrix provided by the embodiments of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the above - mentioned objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] The embodiments of the present application provide a preparation method of an aerosol - generating matrix, as Figure 1 shown, including steps 101 to 103:

[0034] Step 101, obtaining a konjac solidified matter: An aqueous solution of konjac glucomannan (abbreviated as KGM) is subjected to pre - freezing, freeze - drying, and solidification treatments in sequence to obtain the konjac solidified matter.

[0035] In this step, konjac glucomannan powder is added to distilled water, stirred and dissolved to form an aqueous solution of konjac glucomannan, then injected into a mold with a predetermined shape, and then sequentially placed in a pre - freezing device such as a refrigerator for pre - freezing and in a freeze - drying machine or other devices for freeze - drying treatment, and then solidification treatment is carried out. By gradually reducing the temperature, the internal structure of the konjac solidified matter is made uniform, facilitating the uniform loading of the subsequent tobacco extract, flavoring, smoke - generating agent, and nicotine agent;

[0036] Among them, the mold with a predetermined shape can be cylindrical, granular, strip-shaped, sheet-shaped, filamentous, spherical, or other irregular shapes, and can be specifically adjusted according to different cartridge designs.

[0037] In this step, the solidification treatment is the deacetylation of konjac glucomannan to form deacetylated konjac glucomannan. Among them, since the konjac glucomannan (KGM) molecule is a linear high-molecular polysaccharide formed by connecting β-D-glucopyranose (Glcp) and β-D-mannopyranose (Manp) through β-1,4-glycosidic bonds, its molecular chain can form a flexible helical conformation, with very delicate modifying groups - acetyl groups on the spiral strip to form a double-helical structure with voids. The sugar chains of the double-helical structure are free and movable, capable of retaining a large amount of water, making konjac glucomannan have good solubility and a large swelling multiple in cold water; after the acetyl groups are removed, the helical structure of KGM is destroyed, and the spiral strips are intertwined into a network gel, and new crystal regions appear after KGM gels.

[0038] Step 102: Obtain a konjac sponge: successively perform softening treatment, pre-freezing, and freeze-drying on the konjac solidified product to obtain the konjac sponge.

[0039] In this step, first, the konjac solidified product is softened by using a softening agent or other means, which can improve the flexibility of the konjac sponge and make the product have better elasticity; then it is continuously placed in a pre-freezing device such as a refrigerator for pre-freezing and in a freeze-drying machine or other devices for freeze-drying, so as to gradually cool down, thereby obtaining a konjac sponge with better flexibility, a more uniform internal structure, and not easily cracked, which is convenient for the uniform loading of tobacco extracts, flavoring agents, smoke generators, and nicotine agents in the subsequent steps.

[0040] Step 103: Load an aerosol-generating material on the konjac sponge, where the aerosol-generating material includes at least one of a tobacco extract, a flavoring agent, a smoke generator, and a nicotine agent, to obtain an aerosol-generating matrix.

[0041] In this step, by using a coating or spraying device to perform surface flavoring or other means, at least one of a tobacco extract, a flavoring agent, a smoke generator, a nicotine agent, etc. is added to the konjac sponge, and then it is dried by drying / freeze-drying or other means to obtain a smoke-generating section with a high adsorption rate and a high loading rate.

[0042] Among them, the aerosol former includes propylene glycol (PG) and vegetable glycerin (VG). Among them, VG can generate aerosol, while PG is the carrier of flavors and fragrances; the content of PG is less than or equal to 10 wt%, and the content of VG is less than or equal to 35 wt%.

[0043] Among them, the nicotine agent includes nicotine and / or nicotine derivatives. Nicotine includes natural nicotine and / or synthetic nicotine. Nicotine derivatives include one or several of nicotine salts, nicotine in a matrix such as a sugar matrix or an organometallic complex, nicotine-resin combinations, nicotine inclusion complexes, and non-covalently bound nicotine. Among them, non-covalently bound nicotine includes nicotine lactate, nicotine malate, nicotine salicylate, nicotine cyclodextrin inclusion complex, nicotine hydrochloride, nicotine dihydrochloride, nicotine tartrate, nicotine tartrate dihydrate, nicotine sulfate, nicotine zinc chloride, nicotine benzoate, etc. Nicotine derivatives also include nicotine with substituents, such as hexamethyl nicotine, hexamethyl nicotine lactate, hexamethyl nicotine malate, hexamethyl nicotine salicylate, hexamethyl nicotine cyclodextrin inclusion complex, hexamethyl nicotine hydrochloride, hexamethyl nicotine dihydrochloride, hexamethyl nicotine tartrate, hexamethyl nicotine tartrate dihydrate, hexamethyl nicotine sulfate, hexamethyl nicotine zinc chloride, hexamethyl nicotine benzoate, etc., which can provide physiological satisfaction. Among them, the content of the nicotine agent is less than or equal to 2 wt%.

[0044] Among them, the tobacco extract can be adjusted according to the flavor of the cartridge and can be flue-cured tobacco extract, cigar tobacco extract, burley tobacco extract, sun-cured red tobacco extract, Zimbabwe extract, etc., and the addition amount accounts for 1-5% of the mass of the aerosol generation section.

[0045] Among them, the flavors and fragrances can be a mixture of tobacco flavors and fragrances such as watermelon flavor, lemon flavor, etc., or can also be monomeric fragrances such as indole, pyridine, pyrazine, etc., and their addition amount is 1-5% of the mass of the aerosol generation section.

[0046] In the embodiment of the present application, the internal structure of the konjac coagulum prepared by pre-freezing treatment, freeze-drying and solidification treatment is uniform, which is convenient for the subsequent uniform loading of tobacco extract, flavors and fragrances, aerosol former and nicotine agent; and by sequentially performing softening treatment, pre-freezing and freeze-drying treatment on the konjac coagulum, the flexibility of the prepared konjac sponge can be further improved, and it is not easy to crack. Therefore, the aerosol generation matrix prepared based on this konjac sponge in the embodiment of the present application can have both structural uniformity and flexibility and a smooth surface, improving the problem that the matrix of the existing aerosol generation product is relatively rigid, resulting in poor stability of the aerosol amount.

[0047] In some embodiments, the above-mentioned konjac glucomannan is obtained in the following manner:

[0048] The konjac powder is soaked in water, treated with acetic acid and amylase, and then the precipitate is taken and dried to obtain the konjac glucomannan.

[0049] In this embodiment, soaking the konjac powder in water and treating it with acetic acid can remove components such as cellulose and protein in the konjac powder, thereby separating a mixture of glucomannan and starch; then, the amylase is used to hydrolyze the starch into glucose, and after centrifugation, drying, etc., pure glucomannan powder is obtained.

[0050] In some embodiments, during the process of soaking the konjac powder in water, the mass fraction of the konjac powder in the system is 6-30%, the soaking time is 4-12 h, and after stirring for 20-60 min and then filtering, the fully washed konjac powder can be obtained, and then it is treated with acetic acid.

[0051] In some embodiments, during the process of treating the konjac powder with acetic acid, the konjac powder is added with an acetic acid solution, stirred and centrifuged, and then the supernatant after centrifugation is separated from the precipitate, and the precipitate is collected. The precipitate is a mixture of konjac glucomannan and starch.

[0052] In this embodiment, controlling the volume concentration of acetic acid to be 0.1%-8%, specifically it can be one of 0.1%, 0.2%, 0.5%, 1%, 2%, 5%, 8% or the range value between any two of them, can effectively remove components such as cellulose and protein in the konjac powder without damaging the konjac glucomannan.

[0053] In some embodiments, during the process of treating the konjac powder with amylase, the enzymatic hydrolysis temperature is 70-80 °C, the pH is 5-6, and the time is 80-100 min, then the starch can be completely converted into glucose, and during the enzymatic hydrolysis process, it is fully stirred to accelerate the enzymatic hydrolysis process.

[0054] In some embodiments, after the konjac powder is soaked in water, treated with acetic acid and amylase, the precipitate is taken and dried by means of centrifugation, etc., and then the konjac glucomannan can be obtained.

[0055] In some embodiments, in the above step 101, the mass fraction of konjac glucomannan in the aqueous solution of konjac glucomannan can be 0.5%-2%, for example, it can be one of 0.5%, 0.6%, 0.8%, 1%, 1.5%, 2% or the range value between any two of them, and a konjac sponge with a moderate density and capable of effectively taking into account both structural strength and flexibility can be obtained.

[0056] In some embodiments, the temperature of the above-mentioned pre-freezing treatment is -15°C to -25°C, and the time is 12h to 48h, which can achieve sufficient pre-freezing of konjac glucomannan and konjac coagulum. Among them, the process parameters of the pre-freezing treatment of konjac glucomannan and the process parameters of the pre-freezing treatment of konjac coagulum can be the same or different, depending on the specific production conditions, and no further specific limitations are claimed. Exemplarily, the temperature of the pre-freezing treatment is one of -15°C, -16°C, -18°C, -20°C, -22°C, -25°C or the range value between any two of them, and the time is one of 12h, 13h, 15h, 18h, 20h, 25h, 30h, 40h, 48h or the range value between any two of them.

[0057] In some embodiments, the temperature of the above-mentioned freeze-drying treatment is -20°C to -70°C, and the time is 24 to 60h, which can achieve the freeze-drying of konjac glucomannan and konjac coagulum. Among them, the specific process parameters of the freeze-drying treatment of pre-frozen konjac glucomannan and the specific process parameters of the freeze-drying treatment of pre-frozen konjac coagulum can be the same or different, depending on the specific production conditions, and no further specific limitations are claimed. Exemplarily, the temperature of the freeze-drying treatment is one of -20°C, -21°C, -22°C, -25°C, -30°C, -40°C, -50°C, -60°C, -70°C or the range value between any two of them, and the time is one of 24h, 25h, 28h, 30h, 40h, 50h, 60h or the range value between any two of them.

[0058] In some embodiments, in the obtained konjac coagulum, the above-mentioned coagulation treatment includes:

[0059] Placing the freeze-dried product in an alkaline solution for coagulation treatment.

[0060] In this embodiment, by placing the freeze-dried product in an alkaline solution such as an ethanol solution of an alkali, the coagulation treatment is completed; among them, the solution soaking effect can assist the coagulation of konjac glucomannan chains. At the same time, when applied under alkaline conditions, the low-concentration konjac glucomannan in the freeze-dried product will undergo deacetylation to form deacetylated konjac glucomannan, and ethanol can promote the formation of small-sized aggregates that are beneficial to intermolecular aggregation, achieve the aggregation of konjac glucomannan chains and the resulting gelation, and then stabilize the gel network with the help of hydrogen bonds through hydrophobic interactions.

[0061] In some embodiments, in the above-mentioned alkaline solution, the alkali includes one or several of sodium hydroxide, sodium bicarbonate, ammonium bicarbonate, potassium bicarbonate, and light calcium carbonate.

[0062] In some embodiments, in the above-mentioned alkaline solution, the mass fraction of the alkali is 0.5% to 10%. For example, it can be one of 0.5%, 0.6%, 0.8%, 1%, 1.5%, 2%, 5%, 8%, 10% or the range value between any two of them, and the deacetylation of konjac glucomannan with a certain concentration can be achieved.

[0063] In some embodiments, in the above-mentioned alkaline solution, for the coagulation treatment, the treatment temperature is 20°C to 50°C and the treatment duration is 2h to 10h, and the deacetylation of konjac glucomannan with a certain concentration can be completed. For example, the treatment temperature for the coagulation treatment is one of 20°C, 22°C, 25°C, 30°C, 40°C, 50°C or the range value between any two of them, and the treatment duration is one of 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h or the range value between any two of them.

[0064] In some embodiments, in obtaining the konjac sponge, the above-mentioned softening treatment includes:

[0065] Placing the konjac coagulum in an aqueous glycerol solution for the softening treatment.

[0066] In this embodiment, the softening treatment operation is achieved by placing the konjac coagulum in an aqueous glycerol solution. Among them, glycerol can weaken the intermolecular forces such as hydrogen bonds between macromolecules. Furthermore, under the action of an external force field, the macromolecules are prone to rearrangement, making the framework structure of the konjac sponge become soft and retract.

[0067] In some embodiments, during the process of placing the konjac coagulum in an aqueous glycerol solution for softening treatment, the concentration of the aqueous glycerol solution is 0.5wt% to 5.0wt%. For example, it can be one of 0.5wt%, 0.8wt%, 1wt%, 1.5wt%, 2wt%, 5wt% or the range value between any two of them, and effective softening treatment of the konjac coagulum can be achieved.

[0068] In addition, in some embodiments, the treatment temperature for the above-mentioned softening treatment is 20 to 30°C and the treatment duration is 2h to 10h. For example, the treatment temperature can be one of 20°C, 25°C, 30°C or the range value between any two of them, and the treatment duration can be one of 2h, 3h, 5h, 8h, 10h or the range value between any two of them, and effective softening treatment of the konjac coagulum can be completed.

[0069] Optionally, in some embodiments, in loading the aerosol generating material on the above-mentioned konjac sponge, it includes:

[0070] Adopting a dip-coating method, coating the coating liquid on the konjac sponge and then drying it. The coating liquid includes the aerosol generating material, and the mass of the coating liquid is 10 to 30 times the mass of the konjac sponge.

[0071] In this embodiment, the coating solution containing at least one of tobacco extract, flavor and fragrance, aerosol former, and nicotine agent is coated on the konjac sponge by dip coating, and then dried by drying / freeze drying to obtain the smoke generating section with high adsorption rate and high loading rate of the heat-not-burn cigarette.

[0072] In some embodiments, the mass of the coating solution can be one of 10 times, 12 times, 15 times, 20 times, 21 times, 22 times, 25 times, 30 times the mass of the konjac sponge or a range value between any two of them.

[0073] The porosity of the konjac sponge provided in the embodiments of the present application is 70% - 90%, for example, it can be one of 70%, 71%, 75%, 80%, 82.7%, 84.8%, 90% or a range value between any two of them.

[0074] The present application also provides an aerosol generating substrate, which is prepared by the preparation method of the aerosol generating substrate as described above.

[0075] The present application also provides an aerosol generating article, which includes a smoke generating section, and the smoke generating section includes the aerosol generating substrate prepared by the preparation method as described above or the above-mentioned aerosol generating substrate.

[0076] In some embodiments, the above-mentioned aerosol generating article may only contain the smoke generating section of the aerosol generating substrate.

[0077] In addition, in other embodiments, the aerosol generating article may also include a filter section, and the filter section is connected to the smoke generating section.

[0078] For the embodiments of the above-mentioned aerosol generating article, its smoke generating section includes the above-mentioned aerosol generating substrate and can achieve the same technical effects. To avoid repetition, it will not be elaborated here, and the relevant parts can be referred to the description of the aerosol generating substrate embodiments.

[0079] In order to make the invention purpose, technical solutions and beneficial effects of the present application clearer, the present application will be further described below with reference to embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application.

[0080] The present application will be described in detail below through embodiments.

[0081] Testing method

[0082] (1) Adsorption rate test:

[0083] Cut the sample into small pieces, weigh each piece and record the mass as W1. Then put each piece of the sample into the solvent to be adsorbed, allow the sample to fully adsorb the test solution, and finally weigh each piece of the sample and record the weight as W2. The adsorption rate of the sample is calculated by the following formula:

[0084] Adsorption rate = (W2 - W1) / W1 × 100%.

[0085] (2) Loading rate test:

[0086] Calculate according to EE(%) = (R1 - R2) / R2;

[0087] Among them, EE(%) is the loading rate, R1 is the absolute dry weight of the total amount of essence and flavor adsorbed by the sample, and R2 is the absolute dry weight of the sample.

[0088] (3) Aroma quantity test:

[0089] Refer to the aroma quantity in (5) Sensory quality score for the assessor to conduct puffing evaluation.

[0090] (4) Smoke quantity test:

[0091] Suction method: Refer to ISO 20778 and use the smoking device of PMI Company;

[0092] Smoking machine: Linear smoking machine, suction volume 55 mL, suction time 2 s, interval time 30 s, suction puffs 10 puffs / stick, suction number of sticks 5 sticks, suction curve: bell-shaped.

[0093] Measure the smoke quantity by the weight loss method: Divide the mass difference before and after puffing the cartridge by the number of puffs to represent the smoke quantity data.

[0094] (5) Sensory quality score:

[0095] Refer to "GB / T 5606.4 Cigarettes - Part 4: Sensory Technical Requirements", "GB / T 10221 Sensory Analysis - Vocabulary", and "YC / T 138 Tobacco and Tobacco Products - Sensory Evaluation Methods", and calculate the total score after scoring separately according to the four dimensions of aroma characteristics, smoke characteristics, taste characteristics and smoke consistency; among them, the full score of aroma characteristics is 30 points, including 10 points for aroma quantity, 10 points for aroma quality, 5 points for richness, and 5 points for harmony; the full score of smoke characteristics is 25 points, including 15 points for smoke concentration and 10 points for foreign odor; the full score of taste characteristics is 30 points, including 10 points for irritation, 10 points for aftertaste, and 10 points for smoke temperature; the full score of smoke consistency is 15 points.

[0096] (6) Porosity test:

[0097] First, weigh the mass of the sample ($m_0$), then place the sample into a 100 mL small beaker containing a certain amount of distilled water. After it has completely absorbed water, weigh it ($m_1$). Then take out the sample and weigh the mass of the remaining water and the beaker ($m_2$). The calculation can be carried out according to the following formula

[0098]

[0099] Example 1

[0100] (1) Washing to prepare the precipitate: Add konjac flour to distilled water. The mass fraction of konjac flour in the system is 6%, soak for 4 h, and stir at a stirring rate of 200 revolutions per minute for 20 min, then filter to obtain the precipitate.

[0101] (2) Centrifuging to prepare the precipitate: Add acetic acid solution to the precipitate, stir at a stirring rate of 200 revolutions per minute, and then centrifuge at a centrifugal speed of 1000 r / min for 15 min to separate the centrifuged supernatant from the precipitate, and collect the precipitate. The precipitate is a mixture of konjac glucomannan and starch.

[0102] (3) Enzyme treatment of the precipitate: Repeat the pretreatment step (2) 2 - 5 times. Then dissolve the collected precipitate with the last colloidal solution, add amylase, and stir and enzymatically hydrolyze at a temperature of 70 °C and a pH of 5 for 90 min.

[0103] (4) Preparation of konjac glucomannan powder: After enzymatic hydrolysis, centrifuge at a centrifugal rate of 1000 revolutions per minute for 20 min to separate the centrifuged supernatant from the precipitate, collect the precipitate, and then freeze-dry to obtain konjac glucomannan powder.

[0104] (5) Prepare a konjac glucomannan solution with a mass concentration of 0.5% using distilled water and the above-mentioned konjac glucomannan.

[0105] (6) Inject the konjac glucomannan solution into a long cylindrical mold, seal it, place it in the refrigerator and pre-freeze it at -15 °C for 48 h, then take it out and place it in a freeze-dryer for freeze-drying treatment at -45 °C for 60 h to obtain a formed sponge. Then treat it with a 0.5% sodium hydroxide ethanol solution for coagulation, with a coagulation temperature of 20 °C and a duration of 10 h to obtain a konjac coagulum.

[0106] (7) Place the konjac coagulum in a 0.5% glycerol aqueous solution for softening treatment for 10 h, and place it in the refrigerator again for pre-freezing at -15 °C for 48 h. After freezing, place it in a freeze-dryer for freeze-drying treatment at -45 °C for 48 h to obtain a konjac sponge.

[0107] (8) Using the above konjac sponge to dip-coat the coating solution, the coating amount is 22 times the mass of the konjac sponge, and then freeze-drying treatment is carried out for 12 h to obtain the smoking section of the aerosol generating article. Then, surface flavor accounting for 3% of the mass of the smoking section is sprayed, and after cutting into 13 mm, it can be processed into an HNB cartridge;

[0108] Among them, by mass, the coating solution includes: 60 parts of tobacco extract, 8 parts of flavor and fragrance, 5 parts of PG, 25 parts of VG, and 2 parts of nicotine salt.

[0109] Example 2

[0110] The difference between Example 2 and Example 1 is that:

[0111] In step (1), adjust the mass fraction of konjac powder in the system to 30%, the soaking time to 12 h, the stirring rate to 400 rpm, and the stirring time to 60 min;

[0112] In step (2), adjust the stirring rate to 400 rpm, the centrifugation rate to 2000 r / min, and the time to 30 min;

[0113] In step (3), adjust the temperature to 80 °C and the pH to 6;

[0114] In step (4), adjust the centrifugation duration to 60 min;

[0115] In step (5), adjust the mass concentration to 2%;

[0116] In step (6), adjust the pre-freezing temperature to -25 °C, the pre-freezing duration to 12 h, adjust the freeze-drying treatment duration to 24 h, adjust the mass percentage of the sodium hydroxide ethanol solution to 10%, and adjust the solidification temperature to 50 °C and the time to 2 h;

[0117] In step (7), adjust the mass percentage of the glycerol aqueous solution to 5%, the softening treatment duration to 2 h, adjust the pre-freezing temperature to -25 °C, the pre-freezing duration to 12 h, and adjust the freeze-drying treatment duration to 12 h;

[0118] In step (8), adjust the coating amount to 21 times the mass of the konjac sponge.

[0119] Comparative Example 1

[0120] The difference between Comparative Example 1 and Example 1 is that:

[0121] Step (7) is to put the konjac coagulum into an oven and dry it at 40 °C for 5 hours to obtain a konjac sponge.

[0122] Observed with the naked eye, the konjac sponge of Comparative Example 1 had fine striped cracks, while the konjac sponges of Example 1 and Example 2 had no cracks visible to the naked eye.

[0123] The konjac sponges in each example were tested for adsorption rate, loading rate and porosity, and the HNB cartridges in each example were compared with commercially available tobacco-based HNB, granular HNB and flake-type HNB for aroma quantity test, smoke quantity test and sensory quality scoring. The test data are shown in Table 1.

[0124] Table 1

[0125] Sample Adsorption rate % Loading rate % Amount of aroma Amount of smoke mg / cigarette Total sensory quality score (100 points) Porosity % Example 1 128.81 70.38 9.5 6.16 92 84.8 Example 2 121.56 65.14 8.5 5.98 90 82.7 Cut tobacco type HNB / / 7 4.01 81 / Granule type HNB / / 7 4.53 80 / Sheet type HNB / / 8.5 5.52 86 /

[0126] It can be seen from the comparison of each example in Table 1 that in this application, konjac glucomannan is pre-frozen and then freeze-dried and then re-frozen, and a low-temperature solidification process is adopted and matched with a glycerol solution for softening treatment, without high-temperature cooking. Its sponge tissue structure is more and uniform, so it has a higher adsorption rate and loading rate for flavoring agents, and its elasticity and flexibility are better, and it is not easy to crack, which can effectively improve the stability of aerosol quantity.

[0127] In this application, an aqueous solution of konjac glucomannan is first subjected to pre-freezing, freeze-drying and solidification treatment in sequence, and then the obtained konjac solid is subjected to softening treatment, pre-freezing and freeze-drying treatment in sequence. Then, an aerosol-forming material including at least one of tobacco extract, flavoring agent, smoking agent and nicotine agent is loaded on the obtained konjac sponge to obtain an aerosol-forming substrate. Among them, the internal structure of the konjac solid prepared by pre-freezing treatment, freeze-drying and solidification treatment is uniform, which is convenient for the uniform loading of subsequent tobacco extract, flavoring agent, smoking agent and nicotine agent; and the konjac solid is subjected to softening treatment, pre-freezing and freeze-drying treatment in sequence, which can further improve the flexibility of the prepared konjac sponge and make it not easy to crack. Therefore, the aerosol-forming substrate prepared based on this konjac sponge in the examples of this application can have both structural uniformity and flexibility and a smooth surface, improving the problem that the substrate of the existing aerosol-forming products is relatively rigid, resulting in poor stability of aerosol quantity.

[0128] Although the preferred embodiments of the embodiments of this application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of this application.

[0129] The above has introduced in detail a method for preparing an aerosol - generating substrate and an aerosol - generating article provided by this application. Specific examples are used herein to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method of this application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A method for preparing an aerosol - generating substrate, characterized in that, Comprising: Obtaining konjac coagulum: subjecting an aqueous solution of konjac glucomannan to pre-freezing, freeze-drying and coagulation treatment in sequence to obtain the konjac coagulum; Obtaining konjac sponge: subjecting the konjac coagulum to softening treatment, pre-freezing and freeze-drying treatment in sequence to obtain the konjac sponge; Loading an aerosol-generating material on the konjac sponge, the aerosol-generating material including at least one of tobacco extract, flavor and fragrance, fuming agent, nicotine agent, etc., to obtain an aerosol-generating matrix.

2. The preparation method according to claim 1, characterized in that, In the aqueous solution of konjac glucomannan, the mass fraction of konjac glucomannan is 0.5% - 2%.

3. The preparation method according to claim 1, wherein, The treatment temperature of the pre-freezing is -15°C to -25°C, and the treatment duration is 12h to 48h; The treatment temperature of the freeze-drying is -20°C to -70°C, and the treatment duration is 24h to 60h.

4. The preparation method according to claim 1, characterized in that, In the step of obtaining the konjac coagulum, the coagulation treatment includes: Placing the product after freeze-drying in an alkaline solution for the coagulation treatment.

5. The preparation method according to claim 4, characterized in that, The alkaline solution includes one or several of sodium hydroxide, sodium bicarbonate, ammonium bicarbonate, potassium bicarbonate, light calcium carbonate; and / or The mass fraction of the alkaline solution is 0.5% - 10%; the treatment temperature of the coagulation treatment is 20°C to 50°C, and the treatment duration is 2h to 10h.

6. The preparation method according to claim 1, characterized in that, In the step of obtaining the konjac sponge, the softening treatment includes: Placing the konjac coagulum in an aqueous glycerol solution for the softening treatment.

7. The preparation method according to claim 6, characterized in that, The concentration of the aqueous glycerol solution is 0.5wt% - 5.0wt%; The treatment temperature of the softening treatment is 20 - 30°C, and the treatment duration is 2h to 10h.

8. The preparation method according to any one of claims 1 to 7, characterized in that, The konjac glucomannan is obtained by the following method: Soaking konjac powder in water, treating it with acetic acid and amylase, and then drying the precipitate to obtain the konjac glucomannan.

9. According to the preparation method described in any one of claims 1 to 7, characterized in that, In the step of loading the aerosol-generating material on the konjac sponge, it includes: Adopting a dip-coating method, coating a coating solution on the konjac sponge and then drying it, the coating solution includes the aerosol-generating material, and the mass of the coating solution is 10 - 30 times the mass of the konjac sponge; and / or The porosity of the konjac sponge is 70% - 90%.

10. An aerosol-generating article, characterized in that, Including a fuming section, the fuming section includes an aerosol-generating matrix prepared by the preparation method according to any one of claims 1 - 9.

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