Aerosol-generating substrate precursor and method of making the same

Abstract

The application discloses an aerosol generating substrate precursor and a preparation method thereof, and the preparation method comprises the following steps: carrying out a percussion crushing treatment on tobacco and / or aromatic plants; placing the materials into a vacuum sealed environment, adding an acidic treatment liquid, and carrying out a heating aroma production treatment, wherein the heating temperature is 60-120 DEG C; adding inorganic porous materials, flavor additives, polyhydric alcohol smoke agents and binders into the obtained mixture, adding a solvent, and carrying out slurry preparation, granulation and preliminary drying to form base particles, and the aerosol generating substrate precursor is obtained; the free nicotine in the tobacco and / or aromatic plants is salified by treating the tobacco and / or aromatic plants with the acidic treatment liquid, so that the irritability is reduced; and the aroma substances in the tobacco and / or aromatic plant cells are transferred to the surface by combining vacuum heating and crushing, so that the aroma is more easily overflowed when heating without burning, and the flavor is more mellow.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat-not-burn tobacco technology, in particular to an aerosol generating substrate precursor and a preparation method thereof. BACKGROUND

[0002] The aerosol generating substrate product is a consumable used in cooperation with a heat-not-burn smoking set. When the aerosol generating substrate product is inserted into the heat-not-burn smoking set, the aerosol generating substrate product is heated by the heat-not-burn smoking set to heat the smoking raw material (such as tobacco and / or aromatic plant raw material) of the aerosol generating substrate product, so as to generate aerosol for the user to inhale. The heat-not-burn smoking set only heats the smoking raw material without burning the smoking raw material, which can greatly reduce or even avoid the generation of tar, and the composition of smoke is relatively controllable, and harmful substances are relatively less.

[0003] However, the aerosol generating substrate product has the following problems: due to the presence of nicotine in the smoking raw material, the smoking raw material has irritability during smoking, which affects the taste experience; and under the condition of heat-not-burn, the generated aroma of some smoking materials is relatively weak, and the degree of alcohol is not enough, which also affects the taste experience. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an aerosol generating substrate precursor and a preparation method thereof in view of the defects of the prior art.

[0005] The technical solution adopted by the present application to solve the technical problem is: a preparation method of an aerosol generating substrate precursor, comprising the following steps:

[0006] S1, tobacco and / or aromatic plants are subjected to impact crushing treatment;

[0007] S2, aroma production treatment: the material obtained by step S1 is placed in a vacuum sealed environment, an acidic treatment liquid is added, and then heating treatment is performed, the heating temperature is 60-120 DEG C, to obtain an aroma-containing material;

[0008] S3, inorganic porous material, polyhydric alcohol smoking agent, aroma additive and adhesive are added to the aroma-containing material obtained in S2, a neutral solvent is added, and slurry preparation, granulation and preliminary drying of the granules with viscosity are performed, to obtain the aerosol generating substrate precursor.

[0009] Further, preferably in step S1, the aromatic plant comprises at least one of the plants of the families Liliaceae, Cupressaceae, Caprifoliaceae, Primulaceae, Fabaceae, Ericaceae, Annonaceae, Oleaceae, Mimosaceae, Iridaceae, Scrophulariaceae, Gentianaceae, Verbenaceae, Aristolochiaceae, Magnoliaceae, Oleaceae, Rosaceae, Solanaceae, Rubiaceae, Lauraceae, Rutaceae, Asteraceae, Orchidaceae, Poaceae, Piperaceae, Juglandaceae, Caprifoliaceae, Zingiberaceae, Apiaceae, Moraceae, Amaryllidaceae, Pinaceae, Usneaceae, Myrtaceae, Hamamelidaceae, and Malvaceae.

[0010] Further, preferably in step S1, the tobacco, the aromatic plant, or the mixture of both is broken into particles of spindle and / or polyhedral shape; the length-diameter ratio of the spindle, polyhedral shape is (3-5):1.

[0011] Further, preferably in step S1, the particle size of the broken material is 18-100 μm.

[0012] Further, preferably in step S2, the acid treatment solution is added to make the end point pH of the treatment system 6.5-7.8.

[0013] Further, preferably in step S2, the acid treatment solution comprises at least one of citric acid, benzoic acid, lactic acid, levulinic acid, salicylic acid, and tartaric acid.

[0014] Further, preferably in step S2, in step S2, the pre-treatment of the aroma production to the volume of the aroma-containing material is expanded by 1.1-1.5 times, and the free nicotine dissolution amount is increased by at least 50%.

[0015] Further, preferably in step S3, the inorganic porous material comprises at least one of zeolite, molecular sieve, diatomite, montmorillonite, alumina, silica gel, activated carbon, calcium silicate, sepiolite, palygorskite; and / or, the polyhydric alcohol smoke agent comprises at least one of glycerol, propylene glycol, butylene glycol, and butanetriol; and / or, the flavoring additive is an extract of tobacco and / or an extract of aromatic plant; and / or, the binder comprises one or more combinations of pullulan, jambu air polysaccharide, and hydroxypropyl methyl cellulose.

[0016] Further, preferably the aerosol generating substrate precursor comprises the following mass fractions of raw materials: 30-80 parts of tobacco and / or aromatic plant, 10-30 parts of polyhydric alcohol smoke agent, 0-5 parts of binder, 5-20 parts of inorganic porous material, 5-10 parts of flavoring additive;

[0017] and / or, the aerosol generating substrate precursor further comprises 0-8 parts of electromagnetic induction material or 0-8 parts of electric resistance heating material;

[0018] And / or, the aerosol generating substrate precursor further comprises 0-5 parts of a heat conductive material.

[0019] Further, preferably in step S3, the moisture mass percentage of the aerosol generating substrate precursor is 10-50%.

[0020] Further, preferably in step S3, an electromagnetic induction material is further added, the electromagnetic induction material being at least one of iron, nickel, copper, carbon, chromium, manganese, and aluminum.

[0021] Further, preferably in step S3, the particle size of the electromagnetic induction material is 50 nm-1 μm; and / or, the step S3 further comprises a crushing treatment on the electromagnetic induction material, the electromagnetic induction material after the crushing treatment forming a filamentous fiber with a length of 10-50 μm.

[0022] Further, preferably in step S3, a resistance heating material is further added, the resistance heating material comprising at least one of carbon nanotubes, nickel, chromium, and iron.

[0023] Further, preferably in step S3, a heat conductive material after high-temperature impurity removal treatment is further added, the heat conductive material being at least one of iron powder, copper powder, boron nitride, aluminum oxide, and carbon powder, the heat conductive material having a thermal conductivity of 1-500 W / m.k, the heat conductive material having a particle size of 20 nm-2 μm, and the high-temperature impurity removal treatment being performed at a temperature of 800-1500 °C.

[0024] The application further provides an aerosol generating substrate precursor prepared by the above method, the aerosol generating substrate precursor comprising components: a carrier material, an inorganic porous material, a polyol smoke agent, a flavor additive, and a binder, the carrier material being tobacco and / or aromatic plants.

[0025] The application has the following advantages: the tobacco, aromatic plants, or mixture of the two is subjected to a hammer crushing treatment, which facilitates subsequent acid treatment and heat-induced flavor production treatment, and the tobacco and / or aromatic plants are subjected to acid treatment, which causes free nicotine in the tobacco and / or aromatic plants to form a salt, reduces irritation, and improves the taste experience; and the tobacco and / or aromatic plants are subjected to heat-induced flavor production treatment under vacuum at 60-120 °C, which combines vacuum heating and crushing, causes the cells in the tobacco and / or aromatic plants to be hollow, breaks the cell walls, and transfers flavor substances in the cells to the surface, making the aroma easier to overflow when heated without burning, making the flavor more mellow, and improving the taste experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described below with reference to the accompanying drawings and examples, in which:

[0027] Figure 1A flowchart of a method for preparing an aerosol generating substrate precursor in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] Embodiments of the present application will be described in more detail below. It should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0029] An embodiment of the present application provides a method for preparing an aerosol generating substrate precursor, as shown in Figure 1 The method comprises the following steps:

[0030] S1, tobacco and / or aromatic plants are taken for hammering crushing treatment. This step is to facilitate subsequent aroma production treatment; wherein, the raw material can be tobacco alone as a smoking material; or the aromatic plants alone as a smoking material, which has a certain aroma, and is used in the heat-not-burn aerosol generating substrate precursor to enrich the taste of smoke; or a mixture of the two as a smoking material to make the taste richer and meet the various taste needs of users; when tobacco and aromatic plants are mixed, the two can be mixed in any ratio to form a smoking material, such as a mass ratio of 1:1, 1:2, 1:3, 2:3, 2:1, 3:1, etc., which is not limited specifically.

[0031] Further, the particle size of the crushed material (e.g., tobacco, aromatic plants, or a mixture of the two) is controlled to be 18-100 μm, such as 18 μm, 20 μm, 25 μm, 30 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc., which is specifically within the above range. Controlling the particle size of the tobacco, aromatic plants, or mixture of the two to be within the above range facilitates subsequent aroma production treatment and also facilitates heating and smoke generation, improving the user experience.

[0032] Further, preferably, the tobacco, the aromatic plant or the mixture of the two is broken into a particle form of spindle and / or polyhedral particles, with a length-diameter ratio of (3-5):1, such as a length-diameter ratio of 3:1, 4:1, 5:1, etc. The tobacco, the aromatic plant or the mixture of the two is broken into particles with such a structure and a length-diameter ratio; when the tobacco, the aromatic plant or the mixture of the two is in the form of a spindle and / or polyhedron, it is more convenient to fill in the aerosol-forming substrate, and other components can fill the gaps of the tobacco, the aromatic plant or the mixture of the two, thereby improving the utilization rate of space in the aerosol-generating substrate precursor. Since the aerosol-generating substrate precursor is relatively dense, all components can be tightly filled in the production process, so that all components are fixed in the aerosol-generating substrate precursor and cannot be displaced, which is conducive to maintaining the structural stability of the aerosol-generating substrate precursor. This makes it convenient to make the subsequent aerosol-generating substrate, so that the overall structure is more solid and the smoking effect is better.

[0033] In an embodiment of the present application, the aromatic plants are plants with certain aroma, medicinal value or physiological satisfaction, and the aromatic plants include but are not limited to liliaceae (such as aloe, garlic, bell, lily of the valley, onion, smilax, etc.), cupressaceae (such as thuja, garden cypress, juniper, calluna vulgaris, etc.), bupleurum (such as gan song, valerian, horse hoof incense, etc.), primula (such as spiritus, row grass, etc.), legume (such as purple head, oil nass, acacia, clover, calabar, licorice, silver white acacia, peanut, sharp leaf incense tree, jambu, black spice, yellow spice, etc.), ericaceae (such as head ericaceae, xingan ericaceae, wintergreen, yunnan white pearl, etc.), sapotaceae (such as ylang ylang, eagle claw flower, karanjia, etc.), olive (such as olive, myrrh, frankincense, etc.), mimosa (such as catechu, etc.), iris (such as iris rhizome, saffron, iris, etc.), scrophulariaceae (such as foxglove, large leaf stone dragon tail, etc.), gentianaceae (such as chirata gentian, gentian, sleep, etc.), verbena (such as lanxiang grass, vitex, vine, mongolian ball, hair ball, verbena, odoriferous wood, etc.), aristolochiaceae (such as north asarum, asarum, snake root aristolochia, mountain fruit, etc.), magnoliaceae (such as aniseed, white orchid, yellow orchid, purple magnolia, wild aniseed, etc.), osmanthus (such as clove, gardenia, jasmine, osmanthus, violent osmanthus, etc.), rosaceae (such as rose, apricot, apple, cherry, ink red, hawthorn, plum raspberry, strawberry, wood incense, etc.), solanaceae (such as pepper, night blooming jasmine, etc.), rubiaceae (such as small fruit coffee, gardenia, etc.), lauraceae (such as yunnan camphor, cinnamomum zeylanicum, bay, litsea cubeba, magnolia officinalis, cinnamomum tamala, monkey camphor, sichuan camphor, new camphor, citrus junos, rock cinnamomum, beilschmiedia, cinnamomum burmanni, cinnamomum iners, cassia, cassia, bitter orange, orange, bergamot, kumquat, lemon, bamboo pepper, etc.), rutaceae (such as lemon, sweet orange, citrus, ball flower musk, Chinese cinnamon, bergamot, dictamnus, round pomelo, bergamot, red orange, nine mile incense, rutaceae, zanthoxylum, maituo orange, white lemon, bitter orange, orange, citrus, gold orange, lemon, bamboo leaf pepper, etc.), compositae (such as artemisia annua, artemisia vulgaris, mongolian wormwood, wormwood, atractylodes, chrysanthemum, dandelion, inula, canadian potentilla, helichrysum, marigold, plantain, arnica, zanthoxylum, airplane grass, etc.), orchidaceae (such as black orchid, vanilla, etc.), gramineae (such as hair sheath sweetgrass, lemon grass, orange grass, twisted sheath lemongrass, ginger grass, zingiber officinale, zea mays, javanese lemongrass, barley, sugarcane, etc.), piperaceae (sea wind, pepper, small leaf rock climbing incense, etc.), juglandaceae (such as pecan, walnut, etc.), honeysuckle (such as elderberry, honeysuckle, etc.), birch (such as sweet birch, white birch, etc.), zingiberaceae (such as amomum villosum, amomum xanthioides, high ginger, ginger, large high ginger, turmeric, piper longum, piper cubeba, zanthoxylum, etc.), apiaceae (such as cumin, dill, coriander, liaohetongben, carrot, oenanthe javorica, angelica, fennel, allium, red bupleurum, thorowax, indian dill, etc.), moraceae (fig)At least one of the following can be used as aromatic plants: hops, Amaryllidaceae (daffodils, tuberose), Pinaceae (red pine, Masson pine, hemlock, stinking fir, Tibetan longleaf pine), Usnea (clump-forming flowering tree, oakmoss), Myrtaceae (sandalwood, red sandalwood), Hamamelidaceae (lemon eucalyptus, clove, blue eucalyptus, large-leaved eucalyptus, guava, myrtle, fragrant tree, pearl orchid, silver pennywort, caviar orchid, sweetgum, styrax, etc.), and Malvaceae (almond rose, yellow okra, roselle, etc.). No specific limitation is made here. Flowers, fruits, roots, stems, leaves, bark, and seeds of other fragrant natural plants can also be used as aromatic plants.

[0034] S2. The material obtained after step S1 is placed in a vacuum sealed environment, treated with an acidic treatment solution, and then heated to produce fragrance at a temperature of 60-120℃ to obtain a fragrance-containing material. When adding the acidic treatment solution, it is ensured that the solution fully impregnates the tobacco and / or aromatic plants. The purpose of impregnation is to allow the acidic solution to bind with nicotine and other alkaline flavor substances inside the cells. Upon heating, the bound state is converted into a free state, which adheres to the surface of the tobacco and is rapidly released during heated inhalation. The addition of the acidic treatment solution ensures that the final pH of the treatment system is 6.5-7.8, such as pH 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, etc., with no specific limitation. This increases the amount of free nicotine dissolved by at least 50% (mononicotine). Heating converts the bound nicotine into a free state. For example, nicotine in tobacco is mostly citrate nicotine salt, which can be decomposed into free nicotine and citric acid upon heating, reducing irritation and improving the taste experience. The preferred acidic treatment solution includes at least one of citric acid, benzoic acid, lactic acid, levulinic acid, salicylic acid, and tartaric acid. Adding this acidic solution makes the reaction with free salts and alkalis gentler, without damaging other components in tobacco, aromatic plants, or mixtures thereof. The heating temperature can be controlled at 60℃, 70℃, 75℃, 80℃, 90℃, 95℃, 100℃, 105℃, 110℃, 115℃, and 120℃, with no specific limitation. This gentle heating temperature prevents excessive heat from evaporating aroma compounds and avoids their destruction. The combination of crushing treatment and gentle vacuum heating hollows out the cells in the tobacco and / or aromatic plants, breaking down cell walls and transferring aroma compounds from within the cells to the surface. When heated without combustion, the aroma is more easily released, resulting in a richer and more mellow flavor, enhancing the user's taste experience. Taking tobacco as an example, aroma tests were conducted on tobacco before and after aroma treatment to detect the content of breadcrumbs and furfuryl alcohol in the reacting tobacco. The content of the two aroma components in the unreacted tobacco was zero. After aroma treatment, the content of breadcrumbs and furfuryl alcohol reached at least 0.15% and 0.25%, respectively. In other words, aroma treatment of tobacco and / or aromatic plants can make the aroma more easily released, the aroma more mellow, and improve the user's taste experience.

[0035] S3, adding inorganic porous material, polyol smoke agent, flavor additive and adhesive into the flavor material obtained from S2, adding neutral solvent, the neutral solvent is water, alcohol or other neutral solvent, which is convenient for forming paste with certain humidity for subsequent extrusion or punching; slurry preparation, granulation, preliminary drying to form basic particles with viscosity, and aerosol generating substrate precursor is obtained, so as to carry out subsequent forming processing.

[0036] Further, preferably in step S5, the inorganic porous material includes at least one of zeolite, alumina, silica gel, activated carbon, calcium silicate, meerschaum and molecular sieve, the above materials are used as porous flavor carrying material, based on the porous performance, it is beneficial to the release of aerosol, the inorganic porous material can adsorb a large amount of flavoring substances by using its own pore structure, at the same time, the adsorption performance and release performance of the porous material are affected by temperature, when the temperature is low, the release performance of the porous material is low, so during the processing or transportation stage after flavoring, the flavoring substances with low boiling point can be better stored in the porous material, thereby playing a role of preserving flavor and improving product shelf life. With the increase of temperature in the heating and smoking process, the flavoring substances in the porous structure are slowly released, thereby playing a role of slow release and flavoring, so as to ensure that the amount of smoke and the quality of aroma are consistent in the early and late stages of smoking.

[0037] The polyol smoke agent includes at least one of glycerol, propylene glycol, butanediol and butanetriol; the flavor additive is the extract of tobacco and / or aromatic plants, or other essences, spices, etc., the addition of flavor additive can enrich the smell of aerosol and improve the experience of users. The adhesive includes one or more combinations of pullulan, tamarind polysaccharide and hydroxypropyl methyl cellulose, the addition of adhesive can improve the viscosity of each substance in the system, which is beneficial to the subsequent tabletting and forming of adhesive and inorganic porous material, and the presence of adhesive can effectively ensure the addition amount of tobacco and / or aromatic plants, so that the amount of aerosol generating substrate smoke is sufficient.

[0038] Further, preferably in step S3, the moisture mass percentage of the aerosol generating substrate precursor after drying is 10-50%, such as 10%, 12%, 14%, 15%, 16%, 17%, 18%, 20%, 25%, 30%, 35%, 40%, 45% and 50%, etc., without specific limitation, so as to carry out subsequent forming processing.

[0039] In a specific embodiment, in step S3, an electromagnetic induction material is also added, which can be at least one of iron, nickel, copper, carbon, chromium, manganese, aluminum; the electromagnetic induction material is used in an electromagnetic induction heating aerosol generating substrate precursor, and a corresponding heating-not-burning smoking set used in cooperation with the electromagnetic induction heating aerosol generating substrate precursor has a magnetic field generating unit. After the aerosol generating substrate product (finished product of the aerosol generating substrate precursor) is inserted into the heating-not-burning smoking set, it is heated by the magnetic field generating unit, so that the aerosol generating substrate is heated to generate aerosol. In an embodiment of the present application, the particle size of the electromagnetic induction material is 50 nm-1 μm, such as 50 nm, 80 nm, 90 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 900 nm, 1 μm, etc. The specific particle size is not limited, and controlling the particle size of the electromagnetic induction material within the above range can be beneficial to heating by the magnetic field generating unit, so that the smoking material is heated to generate aerosol.

[0040] In step S3, the electromagnetic induction material is also subjected to a crushing treatment, which forms a length of 10-50 μm of filamentous fibers, such as 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, etc. Controlling the length and morphology of the treated material within the above range is beneficial to the mutual lapping of the electromagnetic induction material fibers to form a net-like induction heating structure, increase the induction heating area, and improve the uniformity of heat distribution.

[0041] In a specific embodiment, in step S3, a resistance heating material is also added, which includes at least one of carbon nanotubes, nickel, chromium, and iron. The resistance heating material is used in a resistance heating aerosol generating substrate precursor. The above resistance heating material has good resistance heating efficiency, can quickly heat, and quickly conduct heat to tobacco, aromatic plants, or a mixture of the two, so that aerosol is quickly generated.

[0042] In a specific embodiment, in step S3, the heat-conducting material treated by high-temperature impurity removal is also added. The addition of the heat-conducting material improves heating uniformity and heat conduction efficiency, and improves the heating uniformity and smoking utilization rate of the tobacco, aromatic plants, or mixture of the two. The heat-conducting material includes at least one of boron nitride, aluminum oxide, and carbon powder. The thermal conductivity of the heat-conducting material is 1-500 W / m.k. The thermal conductivity of the heat-conducting material is controlled to be 1 W / m.k, 50 W / m.k, 100 W / m.k, 150 W / m.k, 180 W / m.k, 200 W / m.k, 250 W / m.k, 280 W / m.k, 300 W / m.k, 400 W / m.k, 500 W / m.k, etc. The above heat-conducting materials have high thermal conductivity, so that when the user smokes, the heat can be quickly conducted to the tobacco, aromatic plants, or mixture of the two, so that the tobacco, aromatic plants, or mixture of the two can smoke and generate aerosol. In an embodiment of the present application, the particle size of the selected heat-conducting material is 20 nm-2 μm, such as 20 nm, 30 nm, 50 nm, 80 nm, 90 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 900 nm, 1 μm, 1.5 μm, 2 μm, etc. The specific value is not limited, and controlling the particle size of the heat-conducting material within the above disclosed range can be beneficial to the uniform heat conduction of the heat-conducting material.

[0043] In step S3, the heat-conducting material is treated by high-temperature impurity removal and expansion process. The heating temperature is 800-1500°C, such as 800°C, 850°C, 900°C, 950°C, 1000°C, 1050°C, 1100°C, 1150°C, 1200°C, 1300°C, 1400°C, 1450°C, and 1500°C, etc. The specific value is not limited, so as to remove impurities in the heat-conducting material. The porosity of the heat-conducting material is >65%. Under the condition of high porosity, the pores of the heat-conducting material can adsorb more polyhydric alcohol smoking agents and smoking materials (for example, tobacco and / or aromatic plants), improve heat conversion, and thus improve the heating release efficiency of the adsorbing material. This is beneficial to improve the heat conduction efficiency of the heat-conducting material, and facilitate subsequent filling and mixing with various components.

[0044] In a specific embodiment, the aerosol generating substrate precursor comprises the following raw materials in mass fraction: 30-80 parts of tobacco and / or aromatic plants, 10-30 parts of polyhydric alcohol smoke generating agent, 0-5 parts of adhesive, 5-20 parts of inorganic porous material, and 5-10 parts of flavor additive; for example, the mass fraction of tobacco, aromatic plants, or a mixture of the two is controlled to be 30 parts, 33 parts, 35 parts, 38 parts, 40 parts, 42 parts, 45 parts, 48 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 77 parts, and 80 parts, etc., without limitation; for example, the mass fraction of polyhydric alcohol smoke generating agent is controlled to be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 25 parts, 28 parts, and 30 parts, etc., without limitation; for example, the mass fraction of adhesive is controlled to be 0 parts, 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, and 5 parts, etc., without limitation; for example, the mass fraction of inorganic porous material is controlled to be 5 parts, 5.5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts, etc., without limitation; for example, the mass fraction of flavor additive is controlled to be 5 parts, 5.5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts. Optionally, the aerosol generating substrate precursor can further comprise 0-8 parts of electromagnetic induction material, and the mass fraction of electromagnetic induction material is controlled to be 0 parts, 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, and 8 parts, etc., without limitation; optionally, the aerosol generating substrate precursor can further comprise 0-8 parts of resistance heating material, and the mass fraction of resistance heating material is controlled to be 0 parts, 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, and 8 parts, etc., without limitation; the resistance heating material and the electromagnetic induction material are two parallel embodiments, which are selected according to the specific heating embodiment, without limitation. Further, the aerosol generating substrate precursor further comprises 0-5 parts of heat-conducting material, and the mass fraction of heat-conducting material is controlled to be 0 parts, 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, and 5 parts, etc., without limitation, and the addition of the heat-conducting material improves heating uniformity and heat conduction efficiency.

[0045] The application also provides an aerosol generating substrate precursor prepared by the above preparation method, and the aerosol generating substrate precursor comprises the following raw materials in mass fraction: 30-80 parts of tobacco and / or aromatic plants, 10-30 parts of a polyhydric alcohol smoke generating agent, 0-5 parts of a binder, 5-20 parts of an inorganic porous material, and 5-10 parts of a flavor additive, and the carrier material is tobacco and / or aromatic plants. The aerosol generating substrate product prepared by the aerosol generating substrate precursor of the application has a more concentrated aroma in the aerosol, thereby improving the experience of the user.

[0046] The application is explained and described below by using specific examples.

[0047] Example 1

[0048] An aerosol generating substrate precursor is prepared by the following method:

[0049] S1, 55 parts of tobacco and 10 parts of aromatic plants (for example, peppermint) form a mixture, and the mixture is subjected to impact crushing treatment until the particle type of the material after the crushing treatment is spindle and / or polyhedral particles, the length-diameter ratio of the spindle and polyhedral particles is about 3:1, and the particle size is about 18 μm.

[0050] S2, the material obtained by step S1 is placed in a vacuum sealed environment, an acidic treatment solution (for example, benzoic acid solution) is added, so that the end point pH of the treatment system is 6.8; and heating aroma production treatment is performed, the heating temperature is 60°C, and the heating time is 20 min.

[0051] S3, 3 parts of a heat conducting material are subjected to high temperature impurity removal and puffing process treatment, the heating temperature is 800°C, and the porosity of the heat conducting material is >65%; the heat conducting material is a mixture of graphite powder and graphene.

[0052] S4, 10 parts of an inorganic porous material (for example, zeolite), 5 parts of a flavor additive (for example, rose essence), and 2 parts of a binder (for example, pullulan) are added to the mixture obtained in S2, 15 parts of a polyhydric alcohol smoke generating agent (for example, glycerol) is added, 10 parts of water is additionally added to adjust the moisture content of the mixture to 20%, and the heat conducting material obtained by step S4 is added, slurry preparation, granulation, and preliminary drying are performed to form base particles with a moisture content of 10%, and the aerosol generating substrate precursor is obtained.

[0053] Wherein, the aromatic plant can be replaced by at least one of the aromatic plants disclosed in the foregoing; the acid treatment liquid can be replaced by at least one of citric acid, lactic acid, levulinic acid, salicylic acid, and tartaric acid and a mixture with benzoic acid; the zeolite can be replaced by at least one of molecular sieve, diatomite, montmorillonite, alumina, silica gel, activated carbon, calcium silicate, chitosan porous material, cellulose fiber, lignin particles, clay, meerschaum, palygorskite or a mixture with zeolite; the rose essence can be replaced by other essences; the pullulan can be replaced by at least one of tamarind polysaccharide and hydroxypropyl methyl cellulose or a mixture with pullulan; and the glycerol can be replaced by at least one of propylene glycol, butanediol, and butanetriol or a mixture with glycerol.

[0054] Example 2

[0055] An aerosol generating substrate precursor is prepared by the following method:

[0056] S1, a mixture of 20 parts of tobacco and 10 parts of aromatic plants is subjected to impact crushing treatment until the particle shape of the material after the crushing treatment is spindle and / or polyhedral particles, the length-diameter ratio of the spindle and polyhedral is about 4:1, and the particle size is about 50 μm.

[0057] S2, the material obtained by step S1 is placed in a vacuum sealed environment, an acid treatment liquid (for example, a citric acid solution) is added so that the end point pH of the treatment system is 6.5, and heating aroma production treatment is performed, the heating temperature is 100°C, and the heating time is 16 min.

[0058] S3, 3 parts of electromagnetic induction material are subjected to crushing treatment, the electromagnetic induction material after the crushing treatment forms filamentous fibers with a length of about 15 μm, and the electromagnetic induction material is iron.

[0059] S4, 15 parts of inorganic porous material (for example, zeolite), 7 parts of flavor additive (for example, rose essence), and 5 parts of binder (for example, pullulan) are added to the mixture obtained in S2, 10 parts of polyhydric alcohol smoke agent (for example, propylene glycol) is added, and the electromagnetic induction material obtained by step S3 is added, slurry preparation, granulation, and preliminary drying are performed to form base particles with a moisture content of 20%, and an aerosol generating substrate precursor is obtained.

[0060] Example 3

[0061] An aerosol generating substrate precursor is prepared by the following method:

[0062] S1, a mixture of 40 parts of tobacco and 40 parts of aromatic plants is subjected to impact crushing treatment until the particle shape of the material after the crushing treatment is spindle and / or polyhedral particles, the length-diameter ratio of the spindle and polyhedral is about 5:1, and the particle size is about 100 μm.

[0063] S2, the material obtained by the treatment in step S1 is placed in a vacuum sealed environment, an acidic treatment solution (for example, a citric acid solution) is added to make the pH of the treatment system 7.8, and heating is performed to produce aroma, the heating temperature is 120°C, and the heating time is 13 min.

[0064] S3, 20 parts of inorganic porous material (for example, 10 parts of zeolite and 10 parts of montmorillonite), 10 parts of flavor additive (for example, rose essence), and 1 part of binder (for example, pullulan) are added to the mixture obtained in S2, 30 parts of polyol smoke agent (for example, glycerol) and 4 parts of resistance heating material are added, and slurry preparation, granulation, and preliminary drying are performed to form base particles with a moisture content of 50%, thereby obtaining an aerosol generating substrate precursor.

[0065] Comparative Example 1

[0066] In Comparative Example 1, the tobacco and aromatic plants are not subjected to the hammer crushing treatment in step S1, and the other steps, process parameters, and proportions are the same as in Example 1.

[0067] Comparative Example 2

[0068] In Comparative Example 2, the material is not subjected to vacuum heating treatment in step S2, and the other steps, process parameters, and proportions are the same as in Example 1.

[0069] Comparative Example 3

[0070] In Comparative Example 3, the material is not subjected to acidic solution treatment in step S2, and the other steps, process parameters, and proportions are the same as in Example 1.

[0071] The aerosol generating substrate precursors of Example 1 and Comparative Examples 1 to 3 are prepared into aerosol generating substrate products using existing conventional preparation methods, and performance tests and evaluations are performed, and the test and evaluation standards are according to "ISO 20778-2018 Cigarettes—Standardized system of parameters and definitions for the measurement of tar, nicotine and carbon monoxide delivered by combustible tobacco products—Regulated yield smoking regime", "YC / T 138 Sensory evaluation method of tobacco and tobacco products", and "YC / T 156 Determination of nicotine in total particulate matter of cigarettes—Gas chromatographic method", and the test results are shown in Table 1.

[0072] Table 1. Performance test and evaluation results of aerosol generating substrate products prepared in Example 1 and Comparative Examples 1 to 3

[0073]

[0074] Through the test and evaluation results of examples 1 and comparative examples 1-3, it can be seen that: through the impact crushing treatment of tobacco, aromatic plants or mixture of the two, the subsequent acid treatment, heating and aroma production treatment are facilitated, and then the tobacco and / or aromatic plants are treated with an acidic treatment solution, so that the free nicotine in the tobacco and / or aromatic plants is salified, the irritability is reduced, and the experience of taste is improved; and under vacuum conditions, heating and aroma production treatment is carried out at 60-120 DEG C, vacuum heating and crushing are combined, so that the cell cavitation in the tobacco and / or aromatic plants is achieved, the cell wall is broken, and the flavor substances in the cells are transferred to the surface, the aroma is more easily overflowed when heated without burning, the flavor is more mellow, and the experience of taste of the user is improved. Comparative example 1 does not perform impact crushing treatment on the tobacco and aromatic plants, which is not conducive to the overflow of the flavor and affects the taste; comparative example 2 does not perform heating treatment on the tobacco and / or aromatic plants, the flavor substances of the plant cell wall cannot be transferred to the surface, which is not conducive to the overflow of the flavor and affects the taste; comparative example 3 does not perform acidic solution treatment on the tobacco and / or aromatic plants, which is highly irritating and affects the taste.

[0075] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical application or improvement of technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method of preparing an aerosol generating substrate precursor, characterized by, The method comprises the following steps: S1, tobacco and / or aromatic plants are subjected to a hammer crushing treatment; the tobacco, the aromatic plants, or a mixture of the two are subjected to a crushing treatment to form spindle and / or polyhedral particles; S2, a flavoring treatment: the material obtained in step S1 is placed in a vacuum sealed environment, an acidic treatment liquid is added, the acidic treatment liquid is fully soaked into the tobacco and / or aromatic plants, and then a heating treatment is performed, the heating temperature is 60-120℃, to obtain a flavor-containing material; the acidic treatment liquid comprises at least one of citric acid, benzoic acid, lactic acid, acetylpiclinic acid, salicylic acid, and tartaric acid; The acidic treatment liquid is added to make the pH of the treatment system at the end point 6.5-7.8; S3, an inorganic porous material, a polyhydric alcohol smoke agent, a flavor additive, and a binder are added to the flavor-containing material obtained in S2, a neutral solvent is added, and slurry preparation, granulation, and drying are performed to form an aerosol generating substrate precursor with viscosity.

2. The method of preparing an aerosol generating substrate precursor according to claim 1, characterized by, In step S1, the spindle and polyhedral particles have an aspect ratio of (3-5):

1.

3. The method of claim 1, wherein the tobacco material is heated to a temperature of 100- 200°C. In step S1, the particle size of the crushed material is 18-100μm.

4. The method of claim 1, wherein the tobacco material is heated to a temperature of 100- 200°C. In step S2, the pre-treatment of flavoring expands the volume of the flavor-containing material by 1.1-1.5 times, and the free nicotine dissolution amount increases by at least 50%.

5. The method of claim 1, wherein the tobacco material is heated to a temperature of 100- 200°C. In step S3, the inorganic porous material comprises at least one of zeolite, molecular sieve, diatomite, montmorillonite, alumina, silica gel, activated carbon, calcium silicate, sepiolite, and palygorskite; and / or, the polyhydric alcohol smoke agent comprises at least one of glycerol, propylene glycol, butanediol, and butanetriol; and / or, the flavor additive is an extract of tobacco and / or an extract of aromatic plants; and / or, the binder comprises at least one of pullulan, jambolan polysaccharide, and hydroxypropyl methyl cellulose.

6. The method of preparing an aerosol generating substrate precursor according to claim 1, wherein, The aerosol generating substrate precursor comprises the following raw materials in mass fractions: 30-80 parts of tobacco and / or aromatic plants, 10-30 parts of a polyhydric alcohol smoke agent, 0-5 parts of a binder, 5-20 parts of an inorganic porous material, and 5-10 parts of a flavor additive; And / or, the aerosol generating substrate precursor further comprises 0-8 parts of an electromagnetic induction material or 0-8 parts of an electric resistance heating material; And / or, the aerosol generating substrate precursor further comprises 0-5 parts of a heat conducting material.

7. The method of claim 1, wherein the tobacco material is heated to a temperature of 100- 200°C. In step S3, the moisture mass percentage of the aerosol generating substrate precursor is 10-50%.

8. The method of claim 1, wherein the method further comprises, In step S3, an electromagnetic induction material is further added, and the electromagnetic induction material is at least one of iron, nickel, copper, carbon, chromium, manganese, and aluminum.

9. A method of producing an aerosol generating substrate precursor according to claim 8, wherein, In step S3, the particle size of the electromagnetic induction material is 50nm-1μm; and / or, the step S3 further comprises a crushing treatment of the electromagnetic induction material, and the crushed electromagnetic induction material forms a filamentous fiber with a length of 10-50μm.

10. The method of claim 1, wherein the method further comprises, In step S3, an electric resistance heating material is further added, and the electric resistance heating material comprises at least one of carbon nanotubes, nickel, chromium, and iron.

11. A method of producing an aerosol generating substrate precursor according to any one of claims 1 to 10, wherein In step S3, the heat-conducting material, which is at least one of iron powder, copper powder, boron nitride, aluminum oxide and carbon powder, is added, wherein the heat-conducting material has a thermal conductivity of 1-500 W / m.k, and the particle size of the heat-conducting material is 20 nm-2 μm; and the heat-conducting material is treated at a high temperature of 800-1500 °C.

12. An aerosol generating substrate precursor, characterized in that, The aerosol generating substrate precursor is prepared by the preparation method of any one of claims 1-11, and comprises components: a carrier material, an inorganic porous material, a polyhydric alcohol smoke agent, a flavor additive and a binder, wherein the carrier material is tobacco and / or aromatic plants.

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