A tobacco flavor aerosol generating matrix rod and its preparation method and aerosol generating product containing the same

Abstract

The invention discloses a tobacco flavor aerosol generation matrix rod, a preparation method thereof, and an aerosol generation product containing the same. The porosity of the aerosol generation matrix rod is greater than 70%; the aerosol generation matrix rod comprises a foam matrix body with a pore structure, the pore structure has a smoke-generating substance, a flavoring substance and a first tobacco substance; the surface of the foam matrix body has a smoke-generating substance, a flavoring substance and a second tobacco substance. The invention first prepares a foam matrix body, then vacuumizes the foam matrix body, uses it as a carrier to adsorb the smoke-generating substance, the flavoring substance and the first tobacco substance, and then coats the second tobacco substance after swelling on the surface of the foam matrix body. The aerosol generation matrix rod obtained by the preparation method has a high porosity, and the smoke-generating substance, the flavoring substance and the first tobacco substance are evenly distributed in the pore structure. It has the advantages of large smoke volume and strong tobacco flavor when used in aerosol generation products.

Description

Technical Field

[0001] The invention belongs to the technical field of heat-not-burn cigarettes, and particularly relates to a tobacco flavor aerosol generating matrix rod, a preparation method thereof, and an aerosol generating product containing the same. Background Art

[0002] With the improvement of living standards, people pay more and more attention to their own health problems. In recent years, the health issues of smoking have attracted much attention. In order to meet the changing consumer demand, major domestic and foreign companies have developed various completely hollow tobacco products to replace traditional cigarettes. Among these growing completely hollow tobacco products, electronic cigarettes and heat-not-burn cigarettes are the best.

[0003] As an expanded application of electronic products in the tobacco industry, the advantage of e-cigarettes is that the taste of the smoke is highly variable and can be arbitrarily controlled by adjusting the composition of the smoke oil. However, since the smoke is mainly produced by electronic atomizers, its taste, especially the heat sensation, is still different from that of traditional cigarettes that produce smoke by heating, and old smokers have poor acceptance.

[0004] Heat-not-burn cigarettes are cigarettes that generate smoke from the smoking section of heated cigarettes. The smoke produced by them has a good taste. The smoking section of currently commercialized heat-not-burn cigarettes is disorderly filled reconstituted tobacco leaf flakes or bulk smoke particles. The former disorderly filled reconstituted tobacco leaf flakes have a certain problem of insufficient smoke volume during the smoking process. The insufficient smoke volume is mainly due to: (1) The reconstituted tobacco leaf flakes used as the smoking section require a certain processing strength during the filling process, which also leads to a small amount of flavorings and smoke agents added thereto; (2) After adding flavorings and smoke agents, the reconstituted tobacco leaf flakes need to undergo multiple high-temperature treatment processes, resulting in serious volatilization of the added flavorings and smoke agents; (3) Since the reconstituted tobacco leaf flakes are closely arranged in the smoking section, the smoke generated at the front end of the smoking section away from the filter section will be largely intercepted at the rear end. The latter smoke segment in the form of bulk smoke particles has certain improvements in smoke volume compared to the former, but there is a new problem: since the bulk smoke particles cannot be fixed, they must be filled into the outer tube, and the particles need to be fixed on both sides of the smoke particle segment by sealing paper and sealing parts, resulting in low production efficiency and high defective rate.

[0005] In addition, existing aerosol-generating matrix sticks are usually added with tobacco extracts or tobacco extracts, which can supplement the tobacco aroma to a certain extent, but there is still a certain gap between this and the real tobacco aroma.

[0006] Therefore, it is desirable to provide a smoking unit with a large amount of smoke, rich aroma, and an aroma closer to the original aroma of tobacco, a simple preparation method, and no need to set sealing paper and sealing parts.

[0007] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0008] The present invention first prepares a foam matrix body, and after evacuating the foam matrix body, uses it as a carrier to adsorb smoke-generating substances and flavor-enhancing substances, and then coats tobacco substances on the surface of the foam matrix body adsorbed with the smoke-generating substances and flavor-enhancing substances. The aerosol generating matrix rod obtained by the preparation method has high porosity, and the smoke-generating substances and flavor-enhancing substances are evenly distributed in the pore structure. When used in aerosol generating products, it has the advantages of large smoke volume, high smoke comfort, suitable smoke temperature and being closer to the original tobacco flavor.

[0009] The first aspect of the present invention provides a tobacco-flavored aerosol-generating matrix rod, the porosity of the aerosol-generating matrix rod being greater than 70%; the aerosol-generating matrix rod comprising a foam-like matrix body having a pore structure, the pore structure containing a smoke-generating substance, a flavor-enhancing substance and a first tobacco substance; the surface of the foam-like matrix body containing a smoke-generating substance, a flavor-enhancing substance and a second tobacco substance.

[0010] Preferably, the outer side of the foamed matrix body has an impermeability barrier layer.

[0011] Preferably, the anti-seepage layer is an anti-seepage / heat-conducting layer having an anti-seepage or heat-conducting function, and the anti-seepage / heat-conducting layer includes a waterproof layer and / or an oil-proof layer and / or a heat-conducting layer;

[0012] The waterproof layer is made of alkyl ketene dimer AKD, cationic rosin glue or iron-free aluminum sulfate mixed, paraffin material; the oil-proof layer is made of fluorocarbon organic matter, modified starch, AKD and paraffin mixture, AKD and modified starch mixture material. The heat-conducting layer is selected from but not limited to the aluminum foil layer, which is added to the outside of the foam matrix body by pasting; the aluminum foil layer can play the role of waterproof and / or oil-proof, and at the same time, the aluminum foil layer also has the role of heat conduction and heat preservation, so that the smoking material on the inner wall of the cigarette is evenly heated.

[0013] Preferably, the waterproof layer and / or oil-proof layer is coated on the outside of the foam-like matrix body by spraying.

[0014] During the storage of cigarettes, moisture in the smoking material seeps out of the cigarette paper tube, causing yellow spots. The waterproof layer uses alkyl ketene dimer AKD, cationic rosin glue or iron-free aluminum sulfate mixed with paraffin material to prevent moisture in the smoking material from seeping out of the cigarette paper tube.

[0015] Similarly, smoke agents, flavors and fragrances are added to the smoke material. During long-term storage, the smoke agent in the smoke material will carry the flavors and fragrances to penetrate the outer side of the paper tube, resulting in yellow spots and affecting the appearance of the paper tube. Since the smoke agent is oily, the oil-proof layer uses a mixture of fluorocarbon organic matter, modified starch, AKD and paraffin, and a mixture of AKD and modified starch, which can prevent the smoke agent in the smoke material from carrying flavors and fragrances to penetrate the outer wall of the paper tube and prevent the generation of yellow spots.

[0016] Preferably, the pore structure is multiple.

[0017] Preferably, the flavoring substance includes flavors and fragrances such as menthol, ionone, ethyl maltol, vanillin or rose absolute; the smoke-generating substance includes glycerin or propylene glycol smoke-generating agent; the first tobacco substance includes tobacco water extract paste, and the second tobacco substance includes tobacco powder.

[0018] The tobacco powder herein can be referred to as tobacco dry material, which is obtained by crushing tobacco industry waste materials such as tobacco stems, tobacco stalks and tobacco dust into tobacco powder of 8-50 mesh.

[0019] The second aspect of the present invention provides a method for preparing the aerosol generating matrix stick according to the first aspect of the present invention, comprising the following steps:

[0020] (1) preparing a foam matrix body having a porosity greater than 70%;

[0021] (2) evacuating the foam matrix body to remove air from the pore structure of the foam matrix body;

[0022] (3) preparing a first mixed liquid containing a smoke-generating substance, a flavoring substance and a first tobacco substance, and a second mixed liquid containing a smoke-generating substance, a binder and a flavoring substance, and then immersing the vacuumed foam-like matrix body in the first mixed liquid, and immersing the second tobacco substance in the second mixed liquid;

[0023] (4) taking out the foam-like matrix body soaked in the first mixed liquid and the second tobacco material adsorbed with the second mixed liquid, allowing them to stand, then coating the second tobacco material adsorbed with the second mixed liquid on the surface of the foam-like matrix body soaked in the first mixed liquid, and drying to obtain the aerosol generating matrix rod.

[0024] Preferably, in step (1), the foam matrix body is prepared by:

[0025] 11) mixing the polysaccharide powder, foaming agent, dispersant and coagulant uniformly and dissolving them in an alcohol solution with a volume concentration of 0 to 15% v / v to prepare a foaming slurry;

[0026] 12) The foaming slurry obtained in the previous step is dispersed uniformly and loaded into a mold, and foamed under high temperature conditions for 10-30 minutes to obtain a foamed composition;

[0027] 13) placing the foamed composition obtained in the previous step into a freezer at about -20°C for 12-48 hours, taking it out, dehydrating it, and drying it naturally or by baking it to obtain the foam matrix body;

[0028] Preferably, in step (11), the polysaccharide powder is selected from one or more powders of konjac, starch, modified starch cellulose or glucomannan; the foaming agent is selected from one or more of foaming agent AC, foaming agent H, foaming agent OBSH, foaming agent TSH; the dispersant is selected from one or more of OP-10, Span80, and sucrose ester; and the coagulant is selected from sodium carbonate.

[0029] Preferably, in step (12), the foaming condition is foaming in an oven, drying room or oil bath at a temperature of 160-240°C.

[0030] Preferably, in step (2), the vacuuming condition is to directly place the foam-like matrix body into a vacuum bag and then vacuumize it, and then inject the mixed solution into the vacuum bag containing the foam-like matrix body through the pressure relief port.

[0031] Preferably, in step (3), the flavoring substance includes menthol, ionone, ethyl maltol, vanillin, rose absolute and other flavors and fragrances; the smoke-generating substance includes glycerol or propylene glycol smoke-generating agent; the first tobacco substance includes tobacco water extract paste, and the second tobacco substance includes tobacco powder;

[0032] The mass ratios of the substances in the first mixed liquid are: 10%-25% of flavors and fragrances, 10%-25% of smoke generating agents, and 50%-80% of tobacco water extract paste;

[0033] The mass ratio of each substance in the second mixed liquid is: the content of adhesive is 1-10%, the content of flavor and fragrance is 20%-40%, and the content of smoke-generating agent is 50%-80%; the mass ratio of the second mixed liquid to the second tobacco substance is 1:1-3:1;

[0034] The soaking time is 10-20 minutes.

[0035] Specifically, for volatile flavors and fragrances, such as menthol, blueberry flavor, orange flavor, etc., activated carbon can be used to absorb the volatile flavors and fragrances first, and then the tobacco powder and the activated carbon powder that absorbs the flavors and fragrances are immersed in the mixed liquid of the binder and the smoke-generating agent. After the soaking and swelling, the tobacco powder and the activated carbon powder are then coated on the foam matrix body. Based on the total mass of the tobacco powder and the activated carbon powder, the mass proportion of the activated carbon powder added is 0-20%.

[0036] Preferably, in step (4), the second tobacco material layer is allowed to stand for 10 minutes, and the thickness of the second tobacco material layer is 0.1-2.0 mm, and the tobacco powder size is 8-50 mesh; the tobacco powder here can be called tobacco dry material, which is made from tobacco industry waste such as tobacco stems, tobacco stalks and cigarette dust, which are crushed into 8-50 mesh tobacco powder. The binder is selected from chitosan, hydroxyethylated composite modified ethyl cellulose, guar gum, carboxymethyl cellulose, starch, modified starch, plant cellulose, microcrystalline cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose.

[0037] The drying method is low-temperature drying or microwave drying. The low-temperature drying conditions are: the drying temperature is 60-70°C and the drying time is 0.5-1 hour; the microwave drying conditions are: the microwave power is 100-120W and the microwave time is 10-30min; the aerosol generating matrix rod is dried until the moisture content is 10%-20%.

[0038] The preferred method for preparing the foam matrix body of the present invention is as described above. Of course, other methods in the prior art that can prepare a foam matrix body with a porosity greater than 70% can also be applied to the present invention.

[0039] The third aspect of the present invention provides an aerosol generating product, which includes the aerosol generating matrix rod 1, the air-permeable hollow tube 2 and the filter rod 3 described in the first aspect of the present invention; the air-permeable hollow tube 2 has a ventilation hole 21 that radially penetrates the tube wall of the air-permeable hollow tube 2; the aerosol generating matrix rod 1, the air-permeable hollow tube 2 and the filter rod 3 are wrapped with forming paper and then wrapped with tipping paper to obtain the aerosol generating product.

[0040] In the actual preparation process, only one aerosol generation matrix rod 1, a ventilated hollow tube 2 and a filter rod 3 can be wrapped with forming paper, or multiple aerosol generation matrix rods 1, ventilated hollow tubes 2 and filter rods 3 can be wrapped in sequence to obtain multiple aerosol generation products wrapped with tipping paper, and then cut and then wrapped with tipping paper. That is, the aerosol generation matrix rod 1, ventilated hollow tube 2, filter rod 3, filter rod 3, ventilated hollow tube 2 and aerosol generation matrix rod 1 can be wrapped with forming paper in sequence, and then cut into two sections between the filter rod 3, and then wrapped with tipping paper. In addition, cutting can also be performed at the connected aerosol generation matrix rod 1.

[0041] Because the aerosol generating matrix rod 1 of the present invention is integrated, it can be combined with the breathable hollow tube 2 and the filter rod 3, etc., and the suction quality is improved. Compared with the prior art of filling each unit individually through the filling process, the efficiency is greatly improved.

[0042] Preferably, there is also a grooved corrugated component 4 between the aerosol generating matrix rod 1 and the breathable hollow tube 2. The structure of the grooved corrugated component 4 can refer to the patent application of the present applicant filed on March 15, 2022, with application number 2022102553475, entitled A Particle-Type Aerosol Generating Product with a Grooved Corrugated Component, and the description of the grooved corrugated component in the patent application is incorporated into the present application.

[0043] The air-permeable hollow tube 2 in the present invention can be a paper tube or a acetate hollow tube, and preferably the ventilation hole 21 is axially close to the filter rod 3, and the axial distance from the ventilation hole 21 to the upstream end of the filter rod 3 is 1 / 2-1 / 3 of the axial length of the filter rod 3. In the present invention, the upstream and downstream are determined by the flow direction of the aerosol.

[0044] The filter rod 3 in the present invention can be any form of filter element in the prior art, such as commonly used acetate filter cotton.

[0045] The aerosol generating product of the present invention may also include other structures, as long as it includes the aerosol generating matrix rod described in the first aspect of the present invention, it is within the scope of the present application.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The present invention uses a porous foam material made of polysaccharide powder as the main body of the aerosol generation matrix rod for the first time. Foaming mainly includes three processes: gelation, heating foaming and freezing molding. The polysaccharide powder first forms a three-dimensional network structure under the action of a coagulant, that is, a gel is formed; then it is heated and foamed, and the foaming agent in the gel decomposes to produce bubbles, forming a porous structure; finally, the porous gel is frozen, and the water in the gel forms ice crystals and precipitates, and the solid concentration increases accordingly. The plant molecules are squeezed and combined more tightly by the ice crystals, thereby fixing and molding to obtain the foam matrix body with a porous structure of the present invention. A large number of pore structures ensure that the aerosol generation matrix rod can absorb and carry more smoke-generating substances and flavoring substances. Further, the pore structure of the foam matrix body itself is also conducive to the release of smoke, avoiding the problem that the smoke generated upstream of the aerosol generation matrix rod is intercepted downstream, thereby improving the smoke volume and smoke aroma quality from two aspects.

[0048] 2. The present invention first prepares a foam matrix body, and then uses it as a carrier to adsorb smoke-generating substances and flavoring substances, and does not directly foam the smoke-generating substances, flavoring substances, polysaccharide substance powder, foaming agent, etc. together. The reason is: First, the addition of smoke-generating substances and flavoring substances during the foaming process will greatly affect the foaming effect, and it is difficult to obtain a foam matrix body with a high porosity. Second, due to the high temperature during the foaming process, usually between 160-240°C, such a high temperature causes most of the smoke-generating substances and flavoring substances to volatilize during the foaming process. There are very few smoke-generating substances and flavoring substances in the foam matrix that is actually prepared, so the aerosol-generating matrix stick has a small amount of smoke during the suction process and poor aroma sensory evaluation.

[0049] 3. The present invention prepares a foam matrix body, first soaks and absorbs a mixed solution containing a smoke-generating substance, a flavoring substance and a tobacco water extract, and simultaneously soaks tobacco powder in a mixed solution containing a smoke-generating substance, a binder and a flavoring substance for swelling, and then applies a binder on the surface of the foam matrix body adsorbed with the smoke-generating substance and the flavoring substance, and then applies the tobacco powder after swelling. Tobacco powder is beneficial to providing an aerosol closer to the original fragrance of tobacco relative to tobacco extract or tobacco extract, but the physical properties of tobacco powder cause it to be unable to be added to the foam matrix body by soaking and absorption. In addition, if tobacco powder is directly added during the preparation of the foam matrix body, the foaming process will be affected, and the porosity of the foam matrix body will be greatly reduced. Therefore, the present invention first prepares a foam matrix body, then soaks and absorbs a mixed solution containing a smoke-generating substance, a flavoring substance and a tobacco water extract, and finally applies the tobacco powder after swelling on the surface of the foam matrix body adsorbed with the smoke-generating substance, the flavoring substance and the tobacco water extract, and on the basis of ensuring the porosity, the original fragrance of tobacco is better provided. If dry tobacco powder is directly coated on the surface of the foam-like matrix body, the tobacco powder will absorb the mixed liquid of the foam-like matrix body, thereby causing the tobacco powder to swell, and the tobacco powder will fall off, resulting in a poor appearance. Therefore, in the present invention, while the foam-like matrix body is immersed in the adsorbed mixed liquid, the tobacco powder is also immersed in the mixed liquid to swell, thereby preventing the tobacco powder on the foam-like matrix body from absorbing the mixed liquid again. Furthermore, the introduction of a binder further prevents the tobacco powder from falling off.

[0050] 4. During the process of soaking and absorbing the mixed solution containing the smoke-generating substance and the flavoring substance, the present invention encounters new problems. The present invention notes that during the foaming process, bubbles inside the foam-like matrix body merge during the release process, resulting in smaller pores extending radially along the aerosol generating matrix rod close to the central axis, while larger pores closer to the periphery. If the obtained porous foam-like matrix body is directly immersed in a mixed liquid containing smoke-generating substances and flavoring substances by an infiltration method, or the mixed liquid is directly coated on the outer surface of the foam-like matrix body by a spraying method, since the peripheral pores are larger, its adsorption capacity is stronger, while the pores of the inner layer are smaller and the adsorption capacity is weaker, the diffusion resistance of applying the supplement from the periphery and then diffusing to the inner layer is large, which will cause a large amount of the supplement to be adsorbed by the peripheral pore structure, and it is difficult or rarely diffused to the inner layer, and even the central axis cannot contact the mixed liquid at all. In order to avoid this problem, the only way is to further increase the amount of the mixed liquid, or extend the immersion time, until the inner layer pore structure can adsorb the supplement, but this will lead to excessive use of the mixed liquid and excess outer layer mixed liquid, which is easy to cause yellow spot exudation, and the smoke temperature will be too hot. Therefore, the method of applying the mixed liquid from the periphery has the problem of a large amount of mixed liquid or uneven distribution of the mixed liquid. In order to further solve this problem, the present invention first evacuates the foam-like matrix body, removes the air in the pore structure of the foam-like matrix body, and then immerses the evacuated foam-like matrix body in the mixed liquid, so that under a certain external pressure, the mixed liquid can quickly enter the pore structure and more smoothly enter the pore structure of the inner layer. This method can ensure that the mixed liquid enters the pore structure of the inner layer of the foam-like matrix body under the premise of a shorter immersion time and less mixed liquid, and realizes that the mixed liquid is evenly distributed in the pore structure. The aerosol-generating matrix rod obtained by this preparation method has a high porosity, and the smoke-generating substance and the flavoring substance are evenly distributed in the pore structure. It has the advantages of large smoke volume, high smoke comfort, and suitable smoke temperature when used in aerosol-generating products.

[0051] 5. The aerosol-generating matrix rod of the present invention contains both tobacco water extract and tobacco powder. If only tobacco powder is used to provide the original tobacco flavor, when the tobacco powder is coated too thickly, the tobacco powder wrapped in the outer layer will reduce the smoke amount as a whole. When the tobacco powder is coated too thinly, the tobacco fragrance and strength are obviously insufficient. The aerosol-generating matrix rod of the present invention contains both tobacco water extract and tobacco powder, and better provides the original tobacco flavor while ensuring the amount of smoke.

[0052] 6. The production process of the aerosol generating matrix rod is simple, the production efficiency of the aerosol generating product is high, and the cost is controllable.

[0053] 7. The aerosol generating matrix rod 1 of the present invention is integrated, so it can be combined with the breathable hollow tube 2 and the filter rod 3, etc., to improve the suction quality. Compared with the prior art of filling each unit one by one through the filling process, the efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the structure of the aerosol generating product of Example 1;

[0055] Figure 2 This is a schematic diagram of the structure of the aerosol generating product of Example 2.

[0056] The names of the figure numbers in the figure description: 1-aerosol generating matrix rod, 2-breathable hollow tube, 3-filter rod, 4-grooved corrugated component, 21-ventilation hole. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below in conjunction with embodiments.

[0058] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0059] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0060] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0062] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0063] Example 1

[0064] like Figure 1 The aerosol generating product is a three-component structure, which includes an aerosol generating matrix rod 1, a breathable hollow tube 2 and a filter rod 3; the breathable hollow tube 2 has a ventilation hole 21 that radially penetrates the tube wall of the breathable hollow tube 2; the aerosol generating matrix rod 1, the breathable hollow tube 2 and the filter rod 3 are wrapped with forming paper, and then wrapped with tipping paper to obtain the aerosol generating product. The ventilation hole 21 is axially close to the filter rod 3, and the axial distance from the ventilation hole 21 to the upstream end of the filter rod 3 is 1 / 2 of the axial length of the filter rod 3.

[0065] The porosity of the aerosol-generating matrix rod is 80%. The aerosol-generating matrix rod comprises a foam-like matrix body with a pore structure, wherein the pore structure comprises a smoke-generating substance, a flavoring substance and a first tobacco substance. The surface of the foam-like matrix body comprises a smoke-generating substance, a flavoring substance and a second tobacco substance. The outer side of the foam-like matrix body comprises an impermeable layer. The flavoring substance comprises menthol; the smoke-generating substance comprises propylene glycol; the first tobacco substance comprises a tobacco water extract paste, and the second tobacco substance comprises tobacco powder.

[0066] The method for preparing an aerosol generating matrix stick comprises the following steps:

[0067] (1) preparing a foam matrix body with a porosity of 80%;

[0068] (2) evacuating the foam matrix body to remove air from the pore structure of the foam matrix body;

[0069] (3) preparing a first mixed liquid containing a smoke-generating substance, a flavoring substance and a first tobacco substance, and a second mixed liquid containing a smoke-generating substance, a binder and a flavoring substance, and then immersing the vacuumed foam-like matrix body in the first mixed liquid, and immersing the second tobacco substance in the second mixed liquid;

[0070] (4) taking out the foam-like matrix body soaked in the first mixed liquid and the second tobacco material adsorbed with the second mixed liquid, allowing them to stand, then coating the second tobacco material adsorbed with the second mixed liquid on the surface of the foam-like matrix body soaked in the first mixed liquid, and drying to obtain the aerosol generating matrix rod.

[0071] In step (1), the foam matrix body is prepared by:

[0072] 11) The polysaccharide powder, foaming agent, dispersant and coagulant are mixed evenly and dissolved in an alcohol solution with a volume concentration of 10% v / v to prepare a foaming slurry;

[0073] 12) The foaming slurry obtained in the previous step is dispersed uniformly and loaded into a mold, and foamed under high temperature conditions for 20 minutes to obtain a foamed composition;

[0074] 13) placing the foamed composition obtained in the previous step into a freezer at about -20°C for 36 hours, taking it out, dehydrating it, and drying it naturally or by baking it to obtain the foam matrix body;

[0075] In step (11), the polysaccharide powder is selected from konjac flour; the foaming agent is selected from foaming agent AC; the dispersant is selected from Span80; and the coagulant is selected from sodium carbonate. In step (12), the foaming condition is foaming in an oven at a temperature of 200°C.

[0076] In step (2), the vacuuming condition is to directly put the foam matrix body into a vacuum bag for vacuuming, and then inject the mixed solution into the vacuum bag containing the foam matrix body through the pressure relief port. In step (3), the flavoring substance includes menthol; the smoke-generating substance includes propylene glycol; the first tobacco substance includes tobacco water extract paste, and the second tobacco substance includes tobacco powder. The mass ratio of each substance in the first mixed solution is: 25% flavor and fragrance, 20% smoke-generating agent, and 55% tobacco water extract paste; the mass ratio of each substance in the second mixed solution is: 5% adhesive content, 25% flavor and fragrance content, and 70% smoke-generating agent content; the mass ratio of the second mixed solution and the second tobacco substance is 2:1. The soaking time is 15 minutes. In step (4), the mixture is left to stand for 10 minutes, the tobacco powder size is 8-50 mesh, and the thickness of the second tobacco substance layer is 1.0 mm. The binder is selected from carboxymethyl cellulose. The drying method is low-temperature drying, and the low-temperature drying conditions are: the drying temperature is 65° C., the drying time is 0.5 hours, and the drying is performed until the moisture content of the aerosol generating matrix rod is 12%.

[0077] The aerosol-generating article prepared is referred to as Sample 1.

[0078] Example 2

[0079] The difference from Example 1 is that the smoke-generating substance, the flavoring substance, the polysaccharide substance powder, the foaming agent, etc. are directly foamed together, and the specific steps are as follows:

[0080] 11) mixing polysaccharide powder, foaming agent, dispersant, coagulant, flavoring agent menthol, smoke-generating agent propylene glycol and tobacco powder uniformly and dissolving them in an alcohol solution with a volume concentration of 10% v / v to prepare a foaming slurry;

[0081] 12) The foaming slurry obtained in the previous step is dispersed uniformly and loaded into a mold, and foamed under high temperature conditions for 20 minutes to obtain a foamed composition;

[0082] 13) placing the foamed composition obtained in the previous step into a freezer at about -20°C for 36 hours, taking it out, dehydrating it, and drying it naturally or by baking it to obtain the foam matrix body;

[0083] The tobacco powder herein can be referred to as tobacco dry material, which is obtained by crushing tobacco industry waste materials such as tobacco stems, tobacco stalks and tobacco dust into tobacco powder of 8-50 mesh.

[0084] The other steps are consistent with those in Example 1.

[0085] The aerosol generating article prepared is called Sample 2, and the porosity of the aerosol generating matrix rod thereof is only 35%.

[0086] Example 3

[0087] The difference from Example 1 is that the vacuuming process in step (2) is omitted, and the prepared foam matrix body is directly immersed in a mixed liquid containing a smoke-generating substance, a flavoring substance, and a tobacco substance, and the steps are the same as those in Example 1. The prepared aerosol generating product is called Sample 3.

[0088] Example 4

[0089] The difference from Example 1 is that a grooved corrugated component 4 is further provided between the aerosol generating matrix rod 1 and the breathable hollow tube 2 . The prepared aerosol generating product is called Sample 4.

[0090] Example 5

[0091] The difference from Example 1 is that in the preparation process of the aerosol generating matrix stick, a mixed liquid containing a smoke-generating substance, a flavoring substance and a tobacco water extract paste is directly prepared in step (3), and then the vacuumed foam matrix body is immersed in the mixed liquid, and in step (4), there is no need to coat the tobacco substance on the surface of the foam matrix body.

[0092] Example 6

[0093] The aerosol generating product samples 1-5 were smoked with the matching heat-not-burn cigarette smoking utensils under the same conditions. During the smoking process, the temperature of the aerosol generating matrix rod 1 of the aerosol generating product was about 200° C. The aerosol generating product was sensory evaluated by multiple sensory evaluation personnel, mainly examining six indicators: smoke volume, aroma and fragrance, strength, coordination, irritation, and taste; the scoring values ​​of the six quality inspection indicators were: smoke volume 0-10 points, aroma and fragrance 0-30 points, strength 0-10 points, coordination 0-10 points, irritation 0-15 points, and taste 0-25 points, wherein the total score of the six evaluation indicators was 100 points, and the higher the scores of the five evaluation indicators of smoke volume, aroma and fragrance, strength, coordination, and taste, the stronger the feeling of the evaluation indicator during the smoking process, the higher the score of the irritation evaluation index, the less obvious the feeling of the evaluation index during the smoking process, and the higher the total score of the six evaluation indicators, the better the smoking feeling of the aerosol generating product. Among them, the sensory evaluation scores of aerosol generating product samples 1-4 are shown in Table 1.

[0094] Mainly carried out according to Q / YNZY.J07.022.

[0095] Table 1 Sensory evaluation scores of different aerosol-generating product samples during inhalation

[0096]

[0097]

[0098] According to the data in Table 1, by comparing aerosol generating product sample 1 and aerosol generating product sample 2, it can be seen that the porosity of the aerosol generating matrix rod prepared by directly foaming the smoke-generating substance, flavoring substance, polysaccharide substance powder, foaming agent, etc. together is only 35%, which directly leads to the score of the smoke volume and aroma and flavor of Sample 2 being significantly lower than that of Sample 1.

[0099] Comparing aerosol generating product sample 1 and aerosol generating product sample 3, it can be seen that even if the same foam matrix body is selected, whether to evacuate before soaking and adsorbing the smoke-generating substance and the flavoring substance is also crucial to the sensory evaluation of the suction. The vacuuming process is omitted, and the prepared foam matrix body is directly immersed in the mixed liquid containing the smoke-generating substance, the flavoring substance and the tobacco substance. The mixed liquid in the prepared aerosol generating matrix stick is unevenly distributed, which directly leads to the fact that the smoke volume and coordination scores of sample 2 are significantly lower than those of sample 1.

[0100] In addition, the smoke temperature of aerosol generating product sample 1 entering the smoker's mouth is 39.2°C, while the smoke temperature of aerosol generating product sample 4 entering the smoker's mouth is 38.9°C. This is because the grooved corrugated component has a cavity and the breathable hollow section also has a cavity, so the introduced air can better contact and mix with the smoke, further reducing the smoke temperature.

[0101] By comparing aerosol generating product sample 1 and aerosol generating product sample 5, it can be seen that compared with sample 5 obtained by directly immersing and absorbing the mixed liquid containing tobacco water extract paste, sample 1 obtained by coating tobacco powder on the surface of the foam matrix body adsorbed with smoke-generating substances and flavoring substances, the aerosol inhaled by sensory evaluators during the smoking process is closer to the original aroma of tobacco.

Claims

1. A method for preparing a tobacco flavor aerosol-generating matrix rod, characterized in that: The porosity of the aerosol-generating matrix rod is greater than 70%; the aerosol-generating matrix rod comprises a foam-like matrix body with a pore structure, wherein the pore structure contains a smoke-generating substance, a flavoring substance and a first tobacco substance; the surface of the foam-like matrix body contains a smoke-generating substance, a flavoring substance and a second tobacco substance; The flavoring substance includes menthol, ionone, ethyl maltol, vanillin or rose essential oil flavor; the smoke-generating substance includes glycerin or propylene glycol smoke-generating agent; the first tobacco substance includes tobacco water extract paste, and the second tobacco substance includes tobacco powder; The method for preparing the aerosol generating matrix rod comprises the following steps: (1) preparing a foam matrix body having a porosity greater than 70%; (2) evacuating the foam matrix body to remove air from the pore structure of the foam matrix body; (3) preparing a first mixed liquid containing a smoke-generating substance, a flavoring substance and a first tobacco substance, and a second mixed liquid containing a smoke-generating substance, a binder and a flavoring substance, and then immersing the vacuumed foam-like matrix body in the first mixed liquid, and immersing the second tobacco substance in the second mixed liquid; (4) taking out the foam-like matrix body soaked in the first mixed liquid and the second tobacco material adsorbed with the second mixed liquid, allowing them to stand, then coating the second tobacco material adsorbed with the second mixed liquid on the surface of the foam-like matrix body soaked in the first mixed liquid, and drying to obtain the aerosol generating matrix rod; In step (2), the vacuuming condition is to directly put the foam-like matrix body into a vacuum bag and then vacuumize it, and then inject the mixed solution into the vacuum bag containing the foam-like matrix body through the pressure relief port.

2. The preparation method according to claim 1, characterized in that: The outer side of the foam matrix body is provided with an impermeable layer; The pore structure is multiple.

3. The preparation method according to claim 1, characterized in that: In step (1), the foam matrix body is prepared by: 11) mixing polysaccharide powder, foaming agent, dispersant and coagulant and dissolving them in an alcohol solution with a volume concentration of 0 to 15% v / v to prepare a foaming slurry; 12) The foaming slurry obtained in the previous step is placed into a mold and foamed under high temperature conditions for 10-30 minutes to obtain a foamed composition; 13) The foamed composition obtained in the previous step is placed in a freezer at about -20°C and frozen for 12-48 hours, taken out, dehydrated, and dried naturally or in an oven to obtain the foam matrix body.

4. The preparation method according to claim 3, characterized in that: In step (11), the polysaccharide powder is selected from one or more powders of konjac, starch, modified starch cellulose or glucomannan; the foaming agent is selected from one or more of foaming agent AC, foaming agent H, foaming agent OBSH, foaming agent TSH; the dispersant is selected from one or more of OP-10, Span80, and sucrose ester; the coagulant is selected from sodium carbonate; In step (12), the foaming condition is foaming in an oven, drying room or oil bath at a temperature of 160-240°C.

5. The preparation method according to claim 1, characterized in that: In step (3), the flavoring substance includes menthol, ionone, ethyl maltol, vanillin or rose essential oil flavor; the smoke-generating substance includes glycerin or propylene glycol smoke-generating agent; the first tobacco substance includes tobacco water extract paste, and the second tobacco substance includes tobacco powder; The mass ratios of the substances in the first mixed liquid are: 10%-25% of flavors and fragrances, 10%-25% of smoke generating agents, and 50%-80% of tobacco water extract paste; The mass ratio of each substance in the second mixed liquid is: the content of adhesive is 1-10%, the content of flavor and fragrance is 20%-40%, and the content of smoke-generating agent is 50%-80%; the mass ratio of the second mixed liquid to the second tobacco substance is 1:1-3:1; The soaking time is 10-20 minutes.

6. The preparation method according to claim 1, characterized in that: In step (4), the mixture is allowed to stand for 10 minutes, the thickness of the second tobacco material layer applied is 0.1-2.0 mm, and the tobacco powder has a size of 8-50 mesh; the binder is selected from chitosan, hydroxyethylated composite modified ethyl cellulose, guar gum, carboxymethyl cellulose, starch, modified starch, plant cellulose, microcrystalline cellulose, hydroxyethyl cellulose, and hydroxyethyl methyl cellulose; The drying method is low-temperature drying or microwave drying. The low-temperature drying conditions are: the drying temperature is 60-70°C and the drying time is 0.5-1 hour; the microwave drying conditions are: the microwave power is 100-120W and the microwave time is 10-30min; the aerosol generating matrix rod is dried until the moisture content is 10%-20%.

7. An aerosol generating product, characterized in that It comprises an aerosol-generating matrix rod (1) prepared by the preparation method according to any one of claims 1 to 6, a breathable hollow tube (2) and a filter rod (3); the breathable hollow tube (2) has a ventilation hole (21) radially penetrating the wall of the breathable hollow tube (2); The aerosol generating matrix rod (1), the air-permeable hollow tube (2) and the filter rod (3) are wrapped with forming paper and then wrapped with tipping paper to obtain the aerosol generating product.

8. An aerosol-generating article according to claim 7, characterized in that A grooved corrugated material (4) is also provided between the aerosol generating matrix rod (1) and the air-permeable hollow tube (2).

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