A porous aerosol - generating substrate rod with a channel structure, a preparation method thereof, and an aerosol - generating article comprising the same

Abstract

The present invention discloses a porous aerosol - generating substrate rod with a channel structure, which comprises: a foamy substrate body (111) having a pore structure and a channel structure (222) axially extending within the foamy substrate body (111), wherein the channel structure (222) and the surface of the pore structure have smoke - generating substances, flavor - enhancing substances and tobacco substances; the porosity of the foamy substrate body (111) is 50% - 85%. In the present invention, a foamy substrate body with a channel structure is first prepared, and then it is used as a carrier to adsorb smoke - generating substances, flavor - enhancing substances and tobacco substances. When adsorbing, the mixed liquid is applied from the channel structure (222) of the foamy substrate body (111) and then diffuses towards the periphery of the foamy substrate body. The aerosol - generating substrate rod obtained by this preparation method has a high porosity, and the smoke - generating substances, flavor - enhancing substances and tobacco substances are evenly distributed in the pore structure, and has the advantages of a large amount of smoke, high comfort of the flue gas and appropriate flue - gas temperature when used in aerosol - generating articles.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat-not-burn cigarettes, and particularly relates to a porous aerosol generating matrix rod with a channel structure, a preparation method thereof, and an aerosol generating article containing the same. Background Art

[0002] With the improvement of living standards, people pay more and more attention to their own health problems, and in recent years, the attention to smoking health problems has been very high. In order to meet the changing consumer demands, major domestic and foreign enterprises have developed various completely hollow tobacco products to replace traditional cigarettes. Among these growing completely hollow tobacco products, e-cigarettes and heat-not-burn cigarettes are the leaders.

[0003] As an extended application of electronic products in the tobacco industry, the advantage of e-cigarettes is that the taste variability is strong, and the taste of the smoke can be arbitrarily adjusted by adjusting the components of the e-liquid. However, since the smoke of e-cigarettes is mainly generated by an electronic atomizer, there is still a certain difference in its taste, especially the heat sensation, from that of traditional cigarettes that generate smoke by heating, and the acceptance of old smokers is poor.

[0004] Heat-not-burn cigarettes generate smoke by heating the smoke-generating section of the cigarette stick, and the acceptance of the taste of the generated smoke is relatively good. At present, the smoke-generating section of the commercially available heat-not-burn cigarette stick is a reconstituted tobacco sheet filled disorderly or loose smoke-generating particles. Among them, the smoke-generating section in the form of a reconstituted tobacco sheet filled disorderly has a certain problem of insufficient smoke volume during the suction process. The insufficient smoke volume is mainly due to: (1) The reconstituted tobacco sheet used as the smoke-generating section requires a certain processing strength during the filling process, which also results in a small amount of added flavor and smoke-generating agent; (2) The reconstituted tobacco sheet after adding flavor and smoke-generating agent also needs to go through multiple high-temperature treatment processes, resulting in serious volatilization of the added flavor and smoke-generating agent; (3) Since the reconstituted tobacco sheets are closely arranged in the smoke-generating section, the smoke generated at the front end of the smoke-generating section far from the filter tip section will be largely intercepted at the back end. The smoke-generating section in the form of loose smoke-generating particles has a certain improvement in smoke volume compared with the former, but there are new problems: since the loose smoke-generating particles cannot be fixed, they must be filled into the outer tube in a filling manner, and both sides of the smoke-generating particle section need to fix the particles by means of a sealing paper and a plugging member, resulting in low production efficiency and high defective product rate.

[0005] Therefore, it is desirable to provide a smoke-generating unit with a large amount of smoke, rich aroma, and a simple preparation method, without the need to set a sealing paper and a plugging member.

[0006] In order to solve the above problems, the present invention is proposed. Summary of the Invention

[0007] The present invention first prepares a foamed matrix body with a channel structure, and then uses it as a carrier to adsorb a fuming substance, a flavoring substance, and a tobacco substance. When adsorbing, a mixed solution containing the fuming substance, the flavoring substance, and the tobacco substance is applied from the channel structure 222 of the foamed matrix body 111, and then diffuses to the periphery of the foamed matrix body. The aerosol-generating matrix rod obtained by this preparation method has a high porosity, and the fuming substance, the flavoring substance, and the tobacco substance are evenly distributed in the pore structure, and has the advantages of a large amount of smoke, high comfort of the smoke, and appropriate smoke temperature when used in an aerosol-generating article.

[0008] In a first aspect of the present invention, there is provided a porous aerosol-generating matrix rod with a channel structure, which includes: a foamed matrix body 111 having a pore structure and a channel structure 222 axially extending in the foamed matrix body 111, and the channel structure 222 and the surface of the pore structure have a fuming substance, a flavoring substance, and a tobacco substance;

[0009] The porosity of the foamed matrix body 111 is 50%-85%. Preferably, it is 70-85%.

[0010] Preferably, the flavoring substance includes essence and spices such as menthol, ionone, ethyl maltol, vanillin, and rose absolute; the fuming substance includes a glycerol or propylene glycol fuming agent; the tobacco substance includes a tobacco water extract.

[0011] Preferably, the channel structure 222 is one or more, and its cross-section is circular, rectangular, or triangular;

[0012] The channel structure 222 extends helically along the axis;

[0013] The channel structure 222 axially penetrates the foamed matrix body 111.

[0014] Preferably, when the channel structure is one, it is located at the central axis of the foamed matrix body.

[0015] Preferably, the outer side of the foamed matrix body has an anti-seepage layer;

[0016] The pore structure 3 is multiple.

[0017] Preferably, the anti-seepage layer is an anti-seepage / heat-conducting layer with anti-seepage or heat-conducting functions, and the anti-seepage / heat-conducting layer includes a waterproof layer and / or an oil-proof layer and / or a heat-conducting layer;

[0018] The waterproof layer uses alkyl ketene dimer AKD, cationic rosin size, or a mixture of iron-free aluminum sulfate and paraffin materials; the oil-proof layer uses a fluorocarbon organic compound, modified starch, a mixture of AKD and paraffin, and a mixture of AKD and modified starch materials. The heat-conducting layer is selected from, but not limited to, an aluminum foil layer, which is added to the outside of the foamed matrix body by pasting; the aluminum foil layer can play a role in waterproofing and / or oil-proofing, and at the same time, the aluminum foil layer also has the function of heat conduction and heat preservation, so that the smoking material on the inner wall of the cigarette is heated evenly.

[0019] Preferably, the waterproof layer and / or the oil-proof layer are coated on the outside of the foamed matrix body by spraying.

[0020] During the storage of cigarette sticks, the moisture in the smoking material seeps to the outside of the cigarette paper tube, resulting in yellow spots. The waterproof layer uses alkyl ketene dimer AKD, cationic rosin size, or a mixture of iron-free aluminum sulfate and paraffin materials, which can prevent the moisture in the smoking material from seeping to the outside of the cigarette paper tube.

[0021] Similarly, smoke agents, flavoring agents, etc. will be added to the smoking material. During long-term storage, the smoke agent in the smoking material will carry the flavoring agent and penetrate to the outside 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 fluorocarbon organic compound, modified starch, a mixture of AKD and paraffin, and a mixture of AKD and modified starch materials, which can prevent the smoke agent in the smoking material from carrying the flavoring agent and penetrating to the outer wall of the paper tube, preventing the generation of yellow spots.

[0022] The second aspect of the present invention provides a method for preparing a porous aerosol generating matrix rod with a channel structure as described in the first aspect of the present invention, including the following steps:

[0023] (1) Prepare a foamed matrix body 111 with the channel structure 222 and a porosity of 50%-85%;

[0024] (2) Prepare a mixed solution of a smoking substance, a flavor enhancing substance, and a tobacco substance, and then apply the mixed solution to the channel structure 222 of the foamed matrix body 111 obtained in step (1);

[0025] (3) Dry to obtain the aerosol generating matrix rod.

[0026] Preferably, in step (1), the method for preparing the foamed matrix body 111 is:

[0027] 11) Mix the polysaccharide substance powder, foaming agent, dispersant, and coagulant, and then dissolve them in an alcohol solution with a volume concentration of 0-15% v / v to prepare a foaming slurry;

[0028] 12) Load the foaming slurry obtained in the previous step into a mold with a channel structure, and place it under high temperature conditions to foam for 10 - 30 minutes to obtain the foamed composition;

[0029] 13) Place the foamed composition obtained in the previous step in a freezer at about -20°C and freeze for 12 - 48 hours, take it out, dehydrate, and dry naturally or by drying to obtain the foamy matrix main body 111.

[0030] Preferably, in step (11), the powder of the polysaccharide substance is selected from the powder of one or more 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, and foaming agent TSH; the dispersant is selected from one or more of OP-10, Span80, and sucrose esters; the coagulant is selected from sodium carbonate;

[0031] In step (12), the foaming conditions are foaming in an oven, drying room, or oil bath at a temperature of 160 - 240°C.

[0032] Preferably, in step (2), the method of applying the mixed liquid to the channel structure 222 is: making the mixed liquid flow through the channel structure 222 or directly coating the mixed liquid on the surface of the channel structure 222; the flavoring substances include flavoring agents such as menthol, ionone, ethyl maltol, vanillin, and rose absolute; the smoking substances include glycerol or propylene glycol smoke agents; the tobacco substances include tobacco water extract paste;

[0033] The mass ratio of each substance in the mixed liquid is that the content of the flavoring agent is 10% - 25%, the content of the smoke agent is 10% - 25%, and the content of the tobacco water extract paste is 50% - 80%.

[0034] Preferably, in step (3), 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 - 30 min; dry until the moisture content of the aerosol generating matrix rod is 10% - 20%.

[0035] The preferred method for preparing the foamy matrix main body of the present invention is as above. Of course, other methods in the prior art that can prepare a foamy matrix main body with a porosity of 50% - 85% and a channel structure (such as the extrusion method) can also be applied to the present invention.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 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 porous structures ensure that the aerosol generation matrix rod can absorb and carry more smoking substances, flavoring substances and tobacco substances. Further, the porous 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, and the smoke volume and smoke aroma quality are improved from two aspects.

[0045] 2. The present invention first prepares a foam matrix body, and then uses it as a carrier to adsorb smoke-generating substances, flavoring substances and tobacco substances, and does not directly foam the smoke-generating substances, flavoring substances and tobacco substances together with polysaccharide substance powder, foaming agent, etc. The reason is: First, the addition of smoke-generating substances, flavoring substances and tobacco substances in the foaming process will greatly affect the foaming effect, especially when the added tobacco substance is tobacco powder, 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, and 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.

[0046] 3. The present invention notes that during the foaming process, when the bubbles inside the foamy matrix body are released, bubble coalescence occurs, resulting in smaller pores extending radially towards the central axis in the aerosol - generating matrix rod, and larger pores closer to the periphery. If the obtained porous foamy matrix body is directly immersed in flavor - enhancing substances or smoke - generating agents using the infiltration method, or if flavor - enhancing substances and smoke - generating agents are directly coated on the outer surface of the porous smoke - generating agent using the spraying method, due to the larger pores in the periphery having a stronger adsorption capacity and the smaller pores in the inner layer having a weaker adsorption capacity, the diffusion resistance is large when the mixture is applied from the periphery and diffuses inward. This will cause a large amount of the mixture to be adsorbed by the pore structure in the periphery and be very difficult or rarely diffuse inward, and even the central axis may not be able to contact the mixture at all. To avoid this problem, only the amount of the mixture can be further increased or the soaking time can be lengthened until the pore structure in the inner layer can adsorb the mixture. However, this will lead to an excessive amount of the mixture and an excess of the mixture in the outer layer, which is prone to yellow spot exudation and the flue gas temperature will be too hot. Therefore, when the mixture is applied from the periphery, there are problems of a large amount of the mixture or uneven distribution of the mixture. To further solve this problem, the porous aerosol - generating matrix rod of the present invention has a channel structure extending axially, and the mixture is applied in such a way that the mixture flows through the channel structure or is directly coated on the surface of the channel structure. That is to say, the mixture diffuses from the center to the periphery. Since the pores in the periphery are larger and have a stronger adsorption capacity, while the pores in the inner layer are smaller and have a weaker adsorption capacity, the diffusion resistance is smaller when diffusing from the inside to the outside, thus ensuring that even when a small amount of the mixture is applied, the mixture can be evenly distributed in the pore structure. The aerosol - generating matrix rod obtained by this preparation method has a high porosity, and the smoke - generating substances, flavor - enhancing substances, and tobacco substances are evenly distributed in the pore structure, having the advantages of a large amount of smoke, high comfort of the flue gas, and appropriate flue gas temperature when used in aerosol - generating articles.

[0047] 4. The production process of the aerosol - generating matrix rod is simple, the production efficiency of the aerosol - generating article is high, and the cost is controllable.

[0048] 5. The aerosol - generating matrix rod 1 of the present invention is integral, so it can be compounded with a breathable hollow tube 2, a filter rod 3, etc. Together, while improving the suction quality, the efficiency is greatly improved compared with the prior art where each unit is filled individually through a filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic structural diagram of the aerosol - generating article in Example 1;

[0050] Figure 2 It is a schematic structural diagram of the aerosol - generating article in Example 2.

[0051] Names of the reference signs in the description of the drawings: 1 - aerosol - generating matrix rod, 2 - breathable hollow tube, 3 - filter rod, 4 - grooved corrugated component, 21 - ventilation hole, 111 - foamed matrix body, 222 - channel structure. Detailed implementation manners

[0052] The present invention will be further described in detail below in conjunction with embodiments.

[0053] Those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. For those not specified in the embodiments regarding specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product specifications. For those materials or equipment without indicating the manufacturer, they are all conventional products that can be obtained by purchase.

[0054] Those skilled in the art of this technology can understand that, unless specifically stated, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present invention means the presence of the described 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 their groups. It should be understood that when we say an element is "connected" to another element, it can be directly connected to other elements, or there may also be intermediate elements. In addition, the "connection" used here may include wireless connection.

[0055] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more. The orientation or positional relationship indicated by terms such as "inside", "above", "below", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] Those skilled in the art can understand that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as such herein.

[0058] Example 1

[0059] As Figure 1 , the aerosol-generating article has a three-layer structure, which includes an aerosol-generating substrate rod 1, a breathable hollow tube 2, and a filter rod 3; the breathable hollow tube 2 has ventilation holes 21 that radially penetrate the tube wall of the breathable hollow tube 2; the aerosol-generating substrate 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 article. The ventilation holes 21 are axially close to the filter rod 3, and the axial distance from the upstream end of the ventilation holes 21 to the filter rod 3 is 1 / 2 of the axial length of the filter rod 3.

[0060] The aerosol-generating substrate rod includes: a foamy substrate body 111 having a pore structure and a channel structure 222 axially extending within the foamy substrate body 111. The channel structure 222 and the surface of the pore structure have a fuming substance, a flavoring substance, and a tobacco substance; the porosity of the foamy substrate body 111 is 80%. The flavoring substance includes menthol; the fuming substance includes propylene glycol; the tobacco substance includes a tobacco water extract.

[0061] The channel structure 222 is one or more, and its cross-section is circular; the channel structure 222 axially penetrates the foamy substrate body 111. The channel structure is located at the central axis of the foamy substrate body. The outside of the foamy substrate body has an anti-seepage layer; the pore structure 3 is multiple.

[0062] A method for preparing an aerosol-generating substrate rod, comprising the following steps:

[0063] (1) Prepare a foamy substrate body 111 with the channel structure 222 and a porosity of 80%;

[0064] (2) Prepare a mixed solution of a fuming substance, a flavoring substance, and a tobacco substance, and then apply the mixed solution to the channel structure 222 of the foamy substrate body 111 obtained in step (1);

[0065] (3) Dry to obtain the aerosol-generating substrate rod.

[0066] In step (1), the method for preparing the foamy substrate body 111 is:

[0067] 11) Mix the polysaccharide powder, foaming agent, dispersant, and coagulant, and dissolve them in an alcohol solution with a volume concentration of 10% v / v to prepare a foaming slurry.

[0068] 12) Load the foaming slurry obtained in the previous step into a mold with a channel structure, and place it under high-temperature conditions to foam for 20 minutes to obtain a foamed composition.

[0069] 13) Place the foamed composition obtained in the previous step in a freezer at about -20°C and freeze for 36 hours. Take it out, dehydrate, and dry it naturally or by drying to obtain the foamed matrix body 111.

[0070] In step (11), the polysaccharide powder is selected from konjac powder; the foaming agent is selected from foaming agent AC; the dispersant is selected from Span80; the coagulant is selected from sodium carbonate. In step (12), the foaming condition is to foam in an oven at a temperature of 200°C.

[0071] Preferably, in step (2), the method of applying the mixed liquid to the channel structure 222 is: directly coating the mixed liquid on the surface of the channel structure 222; in step (2), the flavoring substance includes menthol; the smoking substance includes propylene glycol; the tobacco substance includes tobacco water extract, and the proportions of each substance in the mixed liquid are 25% for essence and flavor, 20% for smoking agent, and 55% for tobacco water extract. In step (3), 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 water content of the aerosol generation matrix rod is dried to 12%.

[0072] The prepared aerosol generation article is called Sample 1.

[0073] Example 2

[0074] The difference from Example 1 is that the smoking substance, flavoring substance, tobacco substance, polysaccharide powder, foaming agent, etc. are directly foamed together. The specific steps are as follows:

[0075] 11) Mix the polysaccharide powder, foaming agent, dispersant, coagulant, flavoring substance menthol, smoking substance propylene glycol, and tobacco powder evenly, and dissolve them in an alcohol solution with a volume concentration of 10% v / v to prepare a foaming slurry.

[0076] 12) After dispersing the foaming slurry obtained in the previous step evenly, load it into a mold, and place it under high-temperature conditions to foam for 20 minutes to obtain a foamed composition.

[0077] 13) Place the foamed composition obtained in the previous step in a freezer at about -20°C and freeze for 36 hours. Take it out, dehydrate, and dry it naturally or by drying to obtain the foamed matrix body.

[0078] Here, the tobacco powder can be called tobacco dry material, which is made from waste materials in the cigarette industry such as tobacco stems, tobacco stalks, and tobacco dust, and is crushed into tobacco powder with a mesh size of 80 - 120.

[0079] Other steps are the same as those in Example 1.

[0080] The prepared aerosol - generating article is called Sample 2, and the porosity of its aerosol - generating matrix rod is only 35%.

[0081] Example 3

[0082] The difference from Example 1 is that the foamy matrix body 111 does not have the channel structure 222. The prepared foamy matrix body is directly immersed in a mixed solution containing smoking substances, flavor - enhancing substances, and tobacco substances, and the steps are the same as those in Example 1. The prepared aerosol - generating article is called Sample 3.

[0083] Example 4

[0084] The difference from Example 1 is that there is also a grooved corrugated part 4 between the aerosol - generating matrix rod 1 and the breathable hollow tube 2. The prepared aerosol - generating article is called Sample 4.

[0085] Example 5

[0086] Samples 1 - 4 of the aerosol - generating articles are respectively sucked with a matching heat - not - burn cigarette smoking device under the same conditions. During the sucking process, the temperature of the aerosol - generating matrix rod 1 of the aerosol - generating article is about 200°C. Through multiple sensory evaluation personnel, the aerosol - generating articles are evaluated sensually, mainly examining 6 indicators: smoke volume, aroma and flavor, strength, coordination, irritation, and taste. The scoring values of the 6 quality inspection indicators are: smoke volume 0 - 10 points, aroma and flavor 0 - 30 points, strength 0 - 10 points, coordination 0 - 10 points, irritation 0 - 15 points, taste 0 - 25 points. Among them, the total score of the 6 evaluation indicators is 100 points. And for the 5 evaluation indicators of smoke volume, aroma and flavor, strength, coordination, and taste, the higher the score, the stronger the feeling of this evaluation indicator during the sucking process. For the irritation evaluation indicator, the higher the score, the less obvious the feeling of this evaluation indicator during the sucking process. And the higher the total score of the 6 evaluation indicators, the better the sucking feeling of the aerosol - generating article. Among them, the sensory evaluation scores of samples 1 - 4 of the aerosol - generating articles are shown in Table 1.

[0087] It is mainly carried out according to Q / YNZY.J07.022.

[0088] Table 1 Sensory evaluation scores during sucking of different samples of aerosol - generating articles

[0089]

[0090] Based on the data in Table 1, by comparing aerosol-generating article sample 1 and aerosol-generating article sample 2, it can be seen that when directly foaming the smoke-generating substance, flavor-enhancing substance, tobacco substance, polysaccharide substance powder, foaming agent, etc. together, the porosity of the prepared aerosol-generating matrix rod is only 35%, which directly results in the scores of the smoke volume and aroma and flavor of sample 2 being significantly lower than those of sample 1.

[0091] By comparing aerosol-generating article sample 1 and aerosol-generating article sample 3, it can be seen that whether the foamy matrix body has a channel structure and the way of adsorbing the smoke-generating substance, flavor-enhancing substance and tobacco substance, whether it diffuses from the periphery to the inside or from the inside to the periphery, is also crucial for its suction sensory evaluation. Without setting a channel structure and directly immersing the prepared foamy matrix body in the mixed liquid containing the smoke-generating substance, flavor-enhancing substance and tobacco substance, the mixed liquid diffuses from the periphery to the inside of the foamy matrix body, and the distribution of the mixed liquid in the prepared aerosol-generating matrix rod is uneven, which directly results in the scores of the smoke volume and coordination of sample 2 being significantly lower than those of sample 1.

[0092] In addition, the flue gas temperature of aerosol-generating article sample 1 entering the smoker's mouth is 39.2 °C, while the flue gas temperature of aerosol-generating article 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, and the introduced air can better contact and mix with the flue gas, further reducing the flue gas temperature.

Claims

1. A porous aerosol - generating matrix rod with a channel structure, characterized in that, it comprises: a foamy matrix body (111) having a pore structure and a channel structure (222) axially extending within the foamy matrix body (111), and the channel structure (222) and the surface of the pore structure have a fuming substance, a flavor - enhancing substance and a tobacco substance; the porosity of the foamy matrix body (111) is 50% - 85%; A method for preparing the porous aerosol - generating matrix rod with a channel structure, characterized by comprising the following steps: (1) Prepare a foamy matrix body (111) with the channel structure (222) and a porosity of 50% - 85%; (2) Prepare a mixed solution of a fuming substance, a flavor - enhancing substance and a tobacco substance, and then apply the mixed solution to the channel structure (222) of the foamy matrix body (111) obtained in step (1); (3) Dry to obtain the aerosol - generating matrix rod; In step (1), the method for preparing the foamy matrix body (111) is as follows: 11) Mix a polysaccharide substance powder, a foaming agent, a dispersant and a coagulant, and then dissolve them in an alcohol solution with a volume concentration of 0 - 15% v / v to prepare a foaming slurry; 12) Load the foaming slurry obtained in the previous step into a mold with a channel structure, and foam at a high temperature for 10 - 30 minutes to obtain a foamed composition; 13) Place the foamed composition obtained in the previous step in a freezer at about - 20°C for 12 - 48 hours, take it out, dehydrate, and dry naturally or by drying to obtain the foamy matrix body (111).

2. The porous aerosol - generating matrix rod with a channel structure according to claim 1, characterized in that, the flavor - enhancing substance includes menthol, ionone, ethyl maltol, vanillin or rose absolute essence; the fuming substance includes glycerol or propylene glycol fuming agent; the tobacco substance includes tobacco water extract paste.

3. The porous aerosol - generating matrix rod with a channel structure according to claim 1, characterized in that, the channel structure (222) is one or more, and its cross - section is circular, rectangular or triangular; the channel structure (222) extends spirally along the axis; the channel structure (222) axially penetrates the foamy matrix body (111).

4. The porous aerosol - generating matrix rod with a channel structure according to claim 1, characterized in that, the outer side of the foamy matrix body has an anti - seepage layer; the pore structure is multiple.

5. The porous aerosol - generating matrix rod with a channel structure according to claim 1, characterized in that, in step (11), the polysaccharide substance powder is selected from one or more of konjac, starch, modified starch cellulose or glucomannan powder; 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, sucrose ester; the coagulant is selected from sodium carbonate; In step (12), the foaming condition is to foam in an oven, drying room or oil bath at a temperature of 160 - 240°C.

6. The porous aerosol - generating substrate rod with a channel structure according to claim 1, characterized in that, in step (2), the method of applying the mixture to the channel structure (222) is: allowing the mixture to flow through the channel structure (222) or directly coating the mixture on the surface of the channel structure (222); the flavor - enhancing substances include menthol, ionone, ethyl maltol, vanillin or rose absolute flavoring agents; the fuming substances include glycerol or propylene glycol fuming agents; the tobacco substances include tobacco water - extract paste. In the mixture, the mass ratio of each substance is that the flavoring agent content is 10% - 25%, the fuming agent content is 10% - 25%, and the tobacco water - extract paste content is 50% - 80%.

7. The porous aerosol - generating substrate rod with a channel structure according to claim 1, characterized in that, in step (3), 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 - 30 min; drying until the moisture content of the aerosol - generating substrate rod is 10% - 20%.

8. An aerosol - generating article, characterized in that, it includes the aerosol - generating substrate rod (1) according to any one of claims 1 - 7, a breathable hollow tube (2) and a filter rod (3); the breathable hollow tube (2) has ventilation holes (21) radially penetrating the tube wall of the breathable hollow tube (2). The aerosol - generating substrate 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 article.

Images