Aerosol generating product with multi-stage aerosol generating substrate, preparation method of aerosol generating product and aerosol generating system comprising aerosol generating product

Abstract

The invention discloses an aerosol generating product with a multi-section aerosol generating substrate and a preparation method of the aerosol generating product. The product comprises a first section of aerosol generating substrate, a second section of aerosol generating substrate, a cavity unit and a filtering unit, the first section of aerosol generating substrate comprises gathered paper substrate rods; the second section of aerosol generating substrate comprises an integrated smoke generating tube; the volume of the airflow channel of the first section of aerosol generating substrate is 1%-10% of the volume of the first section of aerosol generating substrate; and the volume of the airflow channel of the second section of aerosol generating substrate is 60%-90% of the volume of the second section of aerosol generating substrate. According to the aerosol generating product with the multi-section aerosol generating matrix, the upstream paper base material rod part and the downstream smoke generating tube part have a synergistic effect, the problems that an existing solid smoke generating tube type aerosol generating product is small in smoke amount, insufficient in fragrance and the like are effectively solved, and the quality and stability of the product are improved; and better smoking experience is provided for the user.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-not-burn cigarettes, and in particular to an aerosol generating product with a multi-stage aerosol generating substrate, a preparation method thereof, and an aerosol generating system comprising the same. Background Art

[0002] As consumers pay more attention to health issues and demand more personalized experience in cigarette products, the tobacco industry continues to respond to the upgrading of consumer demand and develop various smoking products with reduced tar and harm. Among them, heated cigarettes are different from traditional cigarette products in that they are heated in a way that satisfies consumers' sensory needs for cigarette products while providing a healthier smoking experience.

[0003] In the field of aerosol generating products, especially for particulate aerosol generating products, the traditional approach is to block bulk particles by setting a blocking section to prevent the particles from scattering or losing during the suction process. However, while the blocking section effectively blocks the particles, it will inevitably block part of the airflow channel, thereby increasing the interception rate of the aerosol and affecting the product's suction experience and smoke effect.

[0004] In order to overcome this defect, researchers have tried to adopt a new preparation process, that is, to mix tobacco powder or tobacco particles with smoke agents, flavoring substances, adhesives, etc. into a slurry, and then obtain long strips of tobacco core by extrusion or molding, and then dry and cut to obtain tobacco core rods. This method omits the blocking section, but faces new problems in actual operation: in order to ensure the effect of extrusion molding, the amount of smoke agent added is greatly limited. Once the amount of smoke agent added is too large, the long strips of tobacco core obtained by extrusion will be too soft and difficult to mold, which seriously affects the quality and stability of the product. In addition, during the extrusion and drying process, smoke agents and flavoring substances are also prone to release, resulting in insufficient smoke and aroma in the actual product. Even if sufficient smoke agents and flavoring substances are added as required, the expected effect cannot be achieved. This is because some smoke agents and flavoring substances have been released in advance during the preparation process and cannot fully play their role when smoking.

[0005] On the other hand, after the tobacco powder or tobacco particles are mixed with the smoke-generating agent and the binder into a slurry, the long strips of tobacco core are obtained by extrusion or molding, and then cut into multiple tobacco core rods. The problem in the preparation of such tobacco core rods is that in order to ensure that the tobacco core rods at the cuts do not deform or collapse during cutting, the tobacco core rods need to have a certain hardness. However, if the hardness of the tobacco core rods is too high, the tobacco core rods will be particularly brittle and prone to breakage during the filling and packaging process or during use. Therefore, there is a dilemma that the hardness is too low and it is difficult to cut, while the hardness is too high and it is easy to break. In addition, a large amount of binder is required in the molding process of the smoke-generating material tobacco powder or tobacco particles, and the binder will harden after curing, which is also the reason why the overall tobacco core rod is too hard.

[0006] In addition, in the prior art of aerosol-generating products, in order to increase the amount of smoke and the quality of smoke aroma, some researchers will add all the smoke-generating agents and aroma-enhancing substances to the smoke-generating section at the end of the product. However, this design has a series of significant problems. First, since the aroma-enhancing substances are directly exposed to the air, they will be slowly released during storage and transportation. This process not only leads to the gradual loss of aroma components, but also makes the aroma intensity of the product obviously insufficient when it is actually inhaled. Users may therefore feel a significant decrease in the aroma experience, thereby affecting the overall quality and market acceptance of the product. Secondly, the slow release of aroma-enhancing substances also leads to inconsistency in aroma quality before and after inhalation. Over time, due to the continuous release of aroma-enhancing substances, the product may present a relatively strong aroma during the initial inhalation, but in subsequent inhalations, the aroma quality will be significantly weakened. This inconsistency in aroma quality will seriously affect the user's inhalation experience and may lead to user dissatisfaction and loss of the product. Finally, the problem of direct contact of aroma-enhancing substances with air in the prior art also leads to a shortened shelf life of the product. Due to the rapid release and loss of aroma components, the product may not maintain its original aroma quality and taste after long-term storage, which not only limits the market life of the product, but also increases the cost of production and storage.

[0007] In addition, when the user inhales, the entire smoking section will be heated, thereby generating aerosol. When the smoke generated by the smoking section cools down, condensation may form. If these condensates are not properly handled, they can easily flow into the heating chamber of the smoking device connected to it. The presence of condensation may not only pollute the interior of the heating chamber, reduce the cleanliness and hygiene standards of the smoking device, but may also interfere with the normal operation of the heating element, resulting in reduced heating efficiency or uneven heating. In the long run, this pollution and interference may cause the performance of the smoking device to deteriorate, shorten the service life of the smoking device, and even cause safety hazards.

[0008] Therefore, existing tobacco stick-type aerosol generating products still have many deficiencies in preparation process, smoke effect, flavor enhancement effect, and condensate treatment, and a new technical solution is needed to solve these problems.

[0009] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0010] The present invention provides an aerosol generating product having a multi-stage aerosol generating substrate, which comprises a first stage aerosol generating substrate, a second stage aerosol generating substrate, a cavity unit, and a filter unit;

[0011] The first stage aerosol generating substrate is a gathered paper substrate rod;

[0012] The second section of aerosol generating substrate is an integrated smoke tube;

[0013] The volume of the airflow channel of the first section of aerosol generating substrate is 1%-10% of the volume of the first section of aerosol generating substrate;

[0014] The volume of the airflow channel of the second section of aerosol generating substrate is 60%-90% of the volume of the second section of aerosol generating substrate.

[0015] In the present invention, the first-stage aerosol generating matrix, the second-stage aerosol generating matrix, the cavity unit, and the filter unit can be respectively compounded by cigarette paper and forming paper to form a cigarette core segment and a filter segment, and then the cigarette core segment and the filter segment are compounded or twisted by outer wrapping paper to form an aerosol generating product. The first-stage aerosol generating matrix, the second-stage aerosol generating matrix, the cavity unit, and the filter unit can also be directly compounded to form an aerosol generating product. The present invention does not limit the outer wrapping of the aerosol generating product and the form of the molding.

[0016] Preferably, the paper substrate stick comprises a paper substrate, a functional substance and a coating material;

[0017] The paper substrate includes one or more of natural cellulose paper, composite paper, aluminum foil paper, and kraft paper; the gram weight of the paper substrate is 40-120 g / m 2 .

[0018] The functional substances include smoke-generating substances, flavoring substances, tobacco extracts and pigments; further, the functional substances also include natural extracts such as plum extract, honeysuckle extract, and tangerine peel extract, which are used to provide a salivating effect in the smoke.

[0019] The coating material includes a coating material body and a solvent; the coating material body includes but is not limited to ethyl cellulose, shellac, and carnauba wax, and the solvent includes alcohols, and the alcohol includes anhydrous ethanol;

[0020] The smoking tube comprises tobacco material, flavoring material, smoking material and adhesive;

[0021] The tobacco material includes one or more of tobacco powder or tobacco particles;

[0022] The adhesive comprises a water-soluble adhesive;

[0023] Smoking substances include, but are not limited to, one or more of glycerin, propylene glycol, sorbitol, and isopropyl palmitate;

[0024] The flavoring substance includes one or more of menthol, ionone, ethyl maltol, vanillin, rose essential oil flavor or tobacco extract or nicotine salt.

[0025] Preferably, when the paper substrate rod includes both a smoke-generating substance and a flavoring substance, based on mass percentage, the smoke-generating substance accounts for 20%-60% of the paper substrate rod, the flavoring substance accounts for 1%-10%, the tobacco extract accounts for 1%-10%, and the pigment accounts for less than 5%;

[0026] When the smoke-generating tube includes both flavoring substances and smoking substances, based on mass percentage, the smoking substances in the smoke-generating tube account for 5%-15%, the flavoring substances account for 5%-30%, and the tobacco substances account for 30%-80%.

[0027] That is to say, when the paper substrate rod and the smoke-generating tube include both flavoring substances and smoke-generating substances, the proportions of flavoring substances and smoke-generating substances in the paper substrate rod and the smoke-generating tube are not the same. The proportion of smoke-generating substances in the paper substrate rod is higher, while the proportion of flavoring substances is lower, and the paper substrate rod mainly provides aroma and smoke, while the proportion of smoke-generating substances in the smoke-generating tube is lower, while the proportion of flavoring substances is higher, and the smoke-generating tube mainly provides tobacco aroma.

[0028] Preferably, the smoke tube further comprises support fibers; the support fibers are selected from plant fibers, and the plant fibers include one or more of fluff pulp fibers, hemp pulp fibers or wood pulp fibers; wherein the wood pulp fibers can be selected from commonly used wood pulp fibers such as birch, poplar or pine. That is, the components of the smoke tube include tobacco substances, flavoring substances, smoke-generating substances and adhesives, and may or may not contain support fibers.

[0029] Preferably, the structure of the smoke tube is a tube body with one or more axial airflow channels; when it is an ordinary hollow tube body, it has one axial airflow channel, and the inner wall of the hollow tube body may have a groove structure, and when the hollow tube body has a "cross" or "Y" shaped cross-section, it has multiple axial airflow channels.

[0030] Preferably, the wall thickness of the smoke-generating tube is 0.5 mm-1.5 mm.

[0031] Preferably, the cavity unit is a cavity formed by the outer wrapping paper of the aerosol generating product, or is a hollow tube located inside the outer wrapping paper; the hollow tube is a hollow acetate fiber bundle tube, a hollow paper tube or a hollow non-woven fabric tube, and the wall thickness of the hollow tube is 0.2-1.6 mm.

[0032] The cavity unit may or may not have a vent hole;

[0033] More preferably, there is a cooling unit between the cavity unit and the filter unit. The cooling unit can be an ordinary gathered polylactic acid rod or an empty tube, and the empty tube also contains functional materials; and / or the inner wall of the empty tube or the tube wall of the empty tube also contains a fragrance-enhancing and cooling layer, and the fragrance-enhancing and cooling layer is a high molecular polymer or a fragrance-enhancing coating; the empty tube has a vent that runs through the empty tube. These high molecular polymers or fragrance-enhancing coatings are selected from materials that do not produce plastic odor at high temperatures, such as bio-wax, natural biopolymers such as alginate, gelatin, biopolysaccharides, etc. The functional material can be any form of substance with cooling and fragrance-enhancing functions in the prior art.

[0034] Preferably, the first section of aerosol generating substrate and the second section of aerosol generating substrate are both 6 mm to 12 mm in length.

[0035] The second aspect of the present invention provides a method for preparing an aerosol generating product having a multi-stage aerosol generating substrate according to the first aspect of the present invention, wherein the method for preparing the first stage aerosol generating substrate comprises the following steps:

[0036] (A1) Take a paper substrate and treat the paper substrate using an appropriate crushing process to increase the specific surface area of ​​the paper substrate. This can be achieved by mechanical crushing, hot pressing, etc. The degree of crushing should be determined according to the properties of the target adsorbate and the required adsorption performance.

[0037] (A2) adding a functional substance to the crushed paper substrate;

[0038] (A3) preparing a coating material mixture, forming a coating layer on the outer side of the paper substrate having the functional substance by spraying or dipping, and drying to obtain a paper substrate having the functional substance and the coating material;

[0039] (A4) Gathering the paper substrate with the functional substance and the coating material into a rod to obtain the first stage aerosol generating matrix.

[0040] Preferably, in step (A2), the method of adding the functional substance to the crushed paper sheet comprises:

[0041] Method 1: prepare a functional substance mixed solution, immerse the crushed paper sheet in the functional substance mixed solution for adsorption, and obtain a paper sheet with functional substances;

[0042] Method 2: prepare a functional substance mixed solution, immerse the porous material in the functional substance mixed solution for adsorption, and then apply the porous material adsorbed with the functional substance to the crushed paper sheet to obtain a paper sheet with functional substances; the porous material includes activated carbon, ceramic molecular sieve inorganic materials, or polymer organic materials, or plant natural porous materials. Preferably, the porous material is activated carbon, and the mesh number of the activated carbon is 80-300 meshes.

[0043] In step (A2) of the present invention, when method 2 is adopted, the amount of porous material is adjusted according to actual conditions, and usually the mass ratio of porous material to flavoring substance is 2:1-1:2.

[0044] Preferably, the fragrance carrying capacity of the porous material is determined according to the pore properties and adsorption time of the porous material itself, and is combined with the flow state of the final fragrance carrying system to determine the fragrance carrying capacity.

[0045] Preferably, in step (A3), the method for preparing the coating material mixture is: adding the coating material body into the solvent and stirring to prepare a coating material mixture with a mass concentration of 1-15%; the coating material body includes but is not limited to ethyl cellulose, shellac, and carnauba wax, and the solvent includes alcohols, and the alcohols include anhydrous ethanol;

[0046] In step (A3), the drying conditions during the coating process include drying in an oven or air-drying in dry air. The drying conditions in the oven are: placing in an oven at 45-60°C and baking for 10-15 minutes; the air-drying conditions in dry air are: placing in dry air at 45-60°C and air-drying for 5-10 minutes.

[0047] The paper substrate of the present invention is first crushed and then adsorbed. By crushing the paper substrate, more tiny concave-convex structures can be formed on its surface, thereby increasing the specific surface area. The increase in specific surface area increases the contact area between the paper substrate and the target adsorbent (smoking agent, tobacco extract, pigment), which is conducive to the adsorption process. At the same time, if the paper substrate itself has a certain adsorption capacity, the adsorption performance may be further improved after crushing. In addition, during the crushing process, the interaction force between fibers is enhanced to form a more compact structure, so that the paper substrate is easier to gather into a rod shape when subjected to external force.

[0048] Preferably, the method for preparing the second aerosol-generating substrate comprises the following steps:

[0049] (B1) Tobacco substances first absorb flavoring substances and smoke-generating substances;

[0050] (B2) adding a binder to the tobacco material after the flavoring substance and the smoke-generating substance are adsorbed, and mixing to obtain a mixed slurry;

[0051] (B3) The mixed slurry is formed by extrusion or molding to obtain the second stage aerosol generating matrix.

[0052] Preferably, in the preparation method of the second stage aerosol generating substrate, when the smoking tube contains supporting fibers, step (B2) is: mixing the tobacco material after adsorbing the flavoring substance and the smoking substance with the supporting fibers, and then adding a binder thereto, and mixing to obtain a mixed slurry;

[0053] In step (B2), the added amount of the supporting fiber is 5-10% of the total mass of the mixed slurry, and the added amount of the adhesive is 50-70% of the total mass of the mixed slurry; the length of the supporting fiber mixed with the tobacco material after adsorbing the flavoring substance and the smoke-generating substance is 0.5mm-5mm.

[0054] What is limited here is the length of the plant fiber added to the smoking tube or filter tube, not the length of the plant fiber raw material. This is because for the convenience of storage and transportation, the plant fibers currently used in the market are usually agglomerated into blocks, and a process of fiber disintegration is required when using them, that is, the agglomerated plant fibers need to be loosened. This process can be carried out in the following two ways: First, soak the agglomerated plant fibers in water and wait for the plant fibers to be untied, and then wet-grind them until the required fiber length is obtained. At this time, since the plant fibers mixed with tobacco substances cannot contain a large amount of water, the untied plant fibers are dehydrated again. Second, directly dry-grind the agglomerated plant fibers until the required fiber length is obtained, and then mix them with tobacco substances.

[0055] The third aspect of the present invention provides an aerosol generating system, which includes an aerosol generating device and the aerosol generating product with a multi-segment aerosol generating substrate as described in the first aspect of the present invention, wherein the first segment of the aerosol generating substrate is 2-6 mm away from the second segment of the aerosol generating substrate and does not contact the heater of the aerosol generating device.

[0056] The aerosol generating article of the present invention is particularly suitable for heating methods other than central heating, such as circumferential heating and airflow heating.

[0057] The filter unit in the present invention can be any type of filter unit in the prior art. More preferably, the filter unit also contains a flavoring substance to further flavor the smoke.

[0058] Furthermore, flavoring beads can be added to the filter unit. In the present invention, flavoring substances are added to the aerosol generating matrix, and flavoring beads are added to the filter element, wherein the flavoring beads in the filter element play a role in supplementing the aroma of the flavoring substances in the aerosol generating matrix and converting the flavor type in the middle and late stages of suction. Specifically, the flavoring substances in the aerosol generating matrix in the early stage of suction are smoke flavoring. When the consumer feels that the aroma supplement of the suction is insufficient, the beads can be manually pinched and broken, thereby flavoring the smoke in the second half, which plays the role of aroma supplement in the later stage. Furthermore, the aroma and flavor characteristics of the flavoring substances in the aerosol generating matrix and the flavoring beads in the filter element may be inconsistent, which plays the role of changing the style characteristics before and after suction. For example, the flavor characteristics of the flavoring substances in the aerosol generating matrix are fruity, while the flavor characteristics of the flavoring beads in the filter element are chocolate. In this way, when the consumer feels that the fruity style is not obvious during suction, the flavoring beads can be manually pinched and broken, thereby changing to chocolate flavor in the second half of the suction process.

[0059] During the production process, whether to add flavoring beads can be determined according to the actual situation. When two smoke flavors need to be provided, flavoring substances and porous materials can be added to the paper substrate rod, and flavoring beads can be added to the filter unit. When only one smoke flavor needs to be provided, flavoring substances and porous materials can be added only to the paper substrate rod, and flavoring beads are not added to the filter unit, or flavoring substances and porous materials are not added to the paper substrate rod, and flavoring beads are only added to the filter unit.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] Beneficial effects of the overall design of an aerosol generating product having a paper substrate stick aerosol generating matrix:

[0062] 1. In view of the problems existing in the prior art, the present invention proposes an aerosol generating product with a multi-stage aerosol generating substrate, wherein a paper substrate rod carrying a smoke generating agent is separately arranged upstream of the smoke generating tube, and the paper substrate rod has the following beneficial effects:

[0063] (1) Supplementing the amount of smoke: The paper substrate rod is coated or adsorbed with smoke-generating substances. During the inhalation process, the paper substrate rod is heated to generate aerosol, which can supplement the amount of smoke generated by the downstream smoke-generating tube, thereby solving the problem of small amount of smoke in the prior art.

[0064] (2) Improving the release effect of the flavoring substances in the downstream smoke-generating tube: The hot aerosol generated by the upstream paper substrate rod will elute the flavoring substances in the downstream aerosol generating matrix, which helps to improve the release effect of the flavoring substances in the downstream aerosol generating matrix, making the aroma of the product more intense when it is inhaled.

[0065] (3) Design of the airflow channel of the paper substrate rod and the smoke tube: The present invention also defines that the airflow channel volume of the first section of the aerosol generating matrix (i.e., the paper substrate rod part) is smaller, and the paper substrate is filled more tightly; while the airflow channel volume of the second section of the aerosol generating matrix (i.e., the smoke tube part) is larger. This design makes it possible for the gas in the airflow channel of the second section of the aerosol generating matrix to form a negative pressure due to the excessive flow rate during the inhalation process, thereby further extracting the aerosol generated in the first section of the aerosol generating matrix, further increasing the amount of smoke, and making the product's inhalation experience smoother and more comfortable.

[0066] In summary, the upstream paper substrate rod part and the downstream smoke tube part in the aerosol generating product with a multi-stage aerosol generating matrix of the present invention work synergistically, effectively solving the problems of small smoke volume and insufficient aroma in the existing solid smoke tube type aerosol generating products, thereby improving the quality and stability of the product and providing users with a better smoking experience.

[0067] 2. The paper substrate rod of the present invention is mainly used to provide aroma and smoke, and the smoke tube is mainly used to provide tobacco aroma. Moving the smoke tube carrying the aroma enhancing substance backward has the following beneficial effects:

[0068] (1) A paper substrate rod is placed upstream of the smoke pipe with the aroma substance. The paper substrate rod acts as a barrier to effectively isolate the air from direct contact with the aroma substance. Since factors such as oxygen, humidity and temperature in the air may affect the stability and durability of the aroma substance, the setting of this barrier helps to maintain the original state and aroma quality of the aroma substance.

[0069] (2) During the smoking process, the paper substrate rod can ensure that the aroma enhancing substances are released in a stable manner. Due to the air barrier effect of the paper substrate rod, the distribution and release rate of the aroma enhancing substances in the smoke tube can be controlled, thereby ensuring that the aroma quality of the smoke remains consistent throughout the smoking process.

[0070] (3) The provision of paper substrate rods can also help extend the shelf life of the product. Since paper materials have certain moisture-proof and anti-oxidation properties, they can protect the aroma-enhancing substances from damage by the external environment (such as humidity, temperature, light, etc.), thereby extending the shelf life of the product and the persistence of the aroma.

[0071] 3. The paper substrate of the present invention is first crushed and then adsorbed. By crushing the paper substrate, more tiny concave-convex structures can be formed on its surface, thereby increasing the specific surface area. The increase in specific surface area increases the contact area between the paper substrate and the target adsorbent (smoking agent, tobacco extract, pigment), which is beneficial to the adsorption process. At the same time, if the paper substrate itself has a certain adsorption capacity, the adsorption performance may be further improved after crushing. In addition, during the crushing process, the interaction force between fibers is enhanced to form a tighter structure, making the paper substrate easier to gather into a rod shape when subjected to external force.

[0072] 4. When the aerosol generating product of the present invention is used in conjunction with an aerosol generating device, the first section of the aerosol generating substrate is 2-6 mm away from the second section of the aerosol generating substrate and does not contact the heater of the aerosol generating device. When the aerosol generating product is heated, the smoking section will generate smoke. These smoke may form condensates during the cooling process. If there are no appropriate treatment measures, these condensates may flow into the heating chamber of the smoking device, causing pollution to the heating chamber or affecting the normal operation of the smoking device. The present invention can effectively intercept these smoke condensates and prevent them from flowing into the heating chamber by providing a section of unheated paper substrate rod at one end away from the lip. In addition, in addition to the interception effect, due to the porous structure and surface characteristics of the paper material, it can absorb a certain amount of condensate that flows down. This adsorption effect not only further reduces the pollution of the heating chamber by the condensate, but also improves the overall cleanliness and user experience of the aerosol generating product.

[0073] Beneficial effects of coating materials on paper substrate rods:

[0074] 1. The paper substrate rod of the present invention comprises a paper substrate, a functional substance is adsorbed on the paper substrate, and a coating material is provided on the outside of the functional substance. The present invention uses a paper substrate instead of reconstituted tobacco leaves for use in aerosol generating products, but the paper substrate itself does not have the function of generating smoke and aroma. The present invention further uses the paper substrate as a carrier, adsorbs the functional substance on the paper substrate, and generates aroma and smoke through the functional substance to ensure the smoking quality. However, the adsorption of the functional substance on the paper substrate will cause the paper substrate to become soft, which in turn causes the problem of being difficult to gather and form. The present invention further adds a coating material on the outside of the functional substance to ensure the physical strength of the paper substrate rod.

[0075] 2. The present invention coats the surface of the paper substrate with functional substances. The coating layer can improve the physical strength of the paper substrate rod from three aspects. First, the present invention coats the paper substrate with the coating layer after the functional substance (such as smoke agent) is adsorbed and dried. The coating layer can improve the physical strength of the paper substrate rod and prevent the paper substrate from becoming soft after absorbing the smoke agent. Second, the coating layer prevents the smoke agent (only smoke agent is used as an example, and also includes flavors, etc.) inside the paper substrate rod from infiltrating the surface of the paper substrate rod. Third, the coating layer can effectively prevent the passage of moisture in the air, isolate the internal paper substrate and functional substances from the outside world, and effectively reduce the hygroscopicity of the paper substrate. In addition, preventing the paper substrate rod from absorbing moisture in the air also avoids the problem of a decrease in the amount of smoke and an increase in the temperature of the smoke on the paper substrate rod.

[0076] 3. The coating layer on the surface of the paper substrate rod of the present invention can prevent the smoke-generating agent inside the paper substrate rod from seeping out to the surface of the paper substrate rod, and also avoids the problem of yellow spots caused by the smoke-generating agent seeping out to the cigarette paper. There is no need to set an anti-seepage layer on the cigarette paper, thereby reducing the requirements for cigarette paper.

[0077] 4. The coating layer on the surface of the paper substrate rod of the present invention can also lock the internal components of the paper substrate rod (such as smoke generating agents, aroma components, etc.), thereby preventing the internal components of the paper substrate rod from volatilizing and dissipating during storage.

[0078] 5. The coating material of the present invention is selected from ethyl cellulose. The coating layer formed by the material can not only effectively prevent the passage of water, but also has a certain air permeability. Therefore, when the paper substrate rod is heated to generate aerosol, the aerosol can still smoothly pass through the coating layer and be gradually released, and will not affect the smoke generation of the paper substrate rod itself.

[0079] 6. The amount of coating material used in the present invention and the preparation conditions during the coating process ensure the uniformity of the coating. The amount and uniformity of the coating also have a great influence on the volatility. If the amount of the coating is too large or the coating is uneven, the release of volatile substances may be hindered. However, the appropriate amount and uniformity of the coating can ensure that the volatile substances can pass through the coating smoothly when heated.

[0080] Beneficial effects of the smoke tube:

[0081] 1. The smoke tube of the present invention uses tobacco powder or tobacco particles as the main body and supporting fibers as the molding auxiliary material. The addition of supporting fibers has the following advantages: (1) The supporting fibers themselves have a high sugar content. Their addition can produce a bonding effect on the tobacco material, thereby reducing the amount of adhesive used, which not only ensures that the tobacco material is bonded into a rod, but also solves the problem that the smoke tube will become hard and brittle after the adhesive is cured. (2) The supporting fibers can support the smoke tube to prevent it from collapsing and deforming when the long strips of the cigarette core are cut into smoke tubes. (3) The supporting fibers are odorless and will not affect the smoke when inhaled.

[0082] 2. The tobacco powder or tobacco particles in the smoke tube of the present invention have a porous structure, which can absorb flavoring substances and smoke-generating substances, thereby increasing the amount of smoke and smoke flavoring. Since the temperature of the smoke section is relatively high, introducing the flavoring substances into the smoke section is more conducive to the release of the flavoring substances, thereby improving the flavoring effect. In addition, different flavoring substances can achieve characteristic flavor smoke of different aromas, and adding flavoring substances and smoke-generating substances to the smoke tube can make the characteristic flavor and smoke mix more evenly, and the aroma coordination is better.

[0083] 3. Since the smoking tube of the present invention is integrally formed, when it is used as a smoking section, cigarette paper is not required and it can be directly compounded with other components using forming paper or loaded into a paper tube together.

[0084] 4. The structure of the smoke tube of the present invention is a tube body with one or more axial airflow channels. In order to increase the flow area of ​​smoke, the existing cigarette core rods usually have grooves on the periphery as axial channels. However, the present invention finds that when the compounding machine compounds the cigarette core rod with other units, the roller of the compounding machine picks up the cigarette core rod by suction. Due to the grooves on the periphery, the contact area between the suction port of the roller and the cigarette core rod is too small, making it difficult to suck it, and the problem of falling often occurs. Therefore, the cigarette core segment structure of the present invention is a circular tube with multiple axial channels in the center, and the axial grooves are not set on the periphery, thereby increasing the contact area between the suction port of the roller and the cigarette core rod, ensuring that the suction port of the roller can suck the cigarette core rod more stably.

[0085] 5. The smoke-generating tube of the present invention has a high adsorption capacity for both flavor-enhancing substances and smoke-generating substances, so its flavor-carrying capacity is higher than that of reconstituted tobacco leaves or acetate fiber bundles. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 The figure is a schematic diagram of the structure of an aerosol generating product.

[0087] Figure 2 Schematic diagram of the structure of another aerosol generating product.

[0088] The names of the figure marks in the figure description: 1-outer wrapping paper, 2-first stage aerosol generating matrix, 3-second stage aerosol generating matrix, 4-cavity unit, 5-filtering unit, 51-flavor-enhancing bursting beads. DETAILED DESCRIPTION

[0089] The present invention is further described in detail below in conjunction with embodiments.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] Example

[0096] like Figure 1 , this embodiment provides an aerosol generating product having a multi-stage aerosol generating substrate, which includes a first-stage aerosol generating substrate 2, a second-stage aerosol generating substrate 3, a cavity unit 4, and a filter unit 5;

[0097] The first stage aerosol generating substrate is a gathered paper substrate rod;

[0098] The second section of aerosol generating substrate is an integrated smoke tube;

[0099] The volume of the airflow channel of the first section of aerosol generating substrate is 1%-10% of the volume of the first section of aerosol generating substrate;

[0100] The volume of the airflow channel of the second section of aerosol generating substrate is 60%-90% of the volume of the second section of aerosol generating substrate.

[0101] In this embodiment, the first-stage aerosol generating matrix, the second-stage aerosol generating matrix, the cavity unit, and the filter unit are directly compounded through the outer wrapping paper 1 to form an aerosol generating product.

[0102] The paper substrate stick comprises a paper substrate, a functional substance and a coating material;

[0103] The paper substrate comprises natural cellulose paper; the grammage of the paper substrate is 80 g / m 2 .

[0104] The functional substances include smoke-generating substances, flavoring substances, tobacco extracts and pigments;

[0105] The coating material comprises a coating material body and a solvent; the coating material body comprises ethyl cellulose, and the solvent comprises anhydrous ethanol;

[0106] The smoking tube comprises tobacco material, flavoring material, smoking material, supporting fibers and adhesive;

[0107] The tobacco substance includes tobacco powder;

[0108] The supporting fibers are selected from plant fibers, which include one or more of fluff pulp fibers, hemp pulp fibers or wood pulp fibers; wherein the wood pulp fibers can be selected from commonly used wood pulp fibers such as birch, poplar or pine.

[0109] The adhesive comprises a water-soluble adhesive;

[0110] Smoking substances include glycerin and propylene glycol;

[0111] The flavoring substance includes menthol.

[0112] When the paper substrate rod includes both a smoke-generating substance and a flavoring substance, based on mass percentage, the smoke-generating substance accounts for 30% of the paper substrate rod, the flavoring substance accounts for 2%, the tobacco extract accounts for 1%, and the pigment accounts for 1%;

[0113] When the smoke-generating tube includes both flavoring substances and smoking substances, based on mass percentage, the smoking substances account for 10%, the flavoring substances account for 5%, and the tobacco substances account for 60% in the smoke-generating tube.

[0114] That is to say, when the paper substrate rod and the smoke-generating tube include both flavoring substances and smoke-generating substances, the proportions of flavoring substances and smoke-generating substances in the paper substrate rod and the smoke-generating tube are not the same. The proportion of smoke-generating substances in the paper substrate rod is higher, while the proportion of flavoring substances is lower, and the paper substrate rod mainly provides aroma and smoke, while the proportion of smoke-generating substances in the smoke-generating tube is lower, while the proportion of flavoring substances is higher, and the smoke-generating tube mainly provides tobacco aroma.

[0115] The structure of the smoke-generating tube is a tube body with a plurality of axial airflow channels; the hollow tube body has a structure with a "cross" cross section.

[0116] The wall thickness of the smoke-generating tube is 1 mm.

[0117] The cavity unit is a hollow tube located inside the outer wrapping paper; the hollow tube is a hollow acetate fiber bundle tube, and the wall thickness of the hollow tube is 1.5 mm.

[0118] The cavity unit has no vent holes;

[0119] The length of the first section of aerosol-generating substrate is 8 mm, and the length of the second section of aerosol-generating substrate is 7 mm.

[0120] The method for preparing an aerosol generating product having a multi-stage aerosol generating substrate of this embodiment, wherein the method for preparing the first stage aerosol generating substrate comprises the following steps:

[0121] (A1) Take a paper substrate and treat the paper substrate using an appropriate crushing process to increase the specific surface area of ​​the paper substrate. This can be achieved by mechanical crushing, hot pressing, etc. The degree of crushing should be determined according to the properties of the target adsorbate and the required adsorption performance.

[0122] (A2) adding a functional substance to the crushed paper substrate;

[0123] (A3) preparing a coating material mixture, forming a coating layer on the outer side of the paper substrate having the functional substance by spraying or dipping, and drying to obtain a paper substrate having the functional substance and the coating material;

[0124] (A4) Gathering the paper substrate with the functional substance and the coating material into a rod to obtain the first stage aerosol generating matrix.

[0125] In step (A2), the method of adding the functional substance to the crushed paper sheet comprises:

[0126] Method 1: prepare a functional substance mixed solution, immerse the crushed paper sheet in the functional substance mixed solution for adsorption, and obtain a paper sheet with functional substances;

[0127] Method 2: prepare a mixed liquid of functional substances, immerse the porous material in the mixed liquid of functional substances for adsorption, and then apply the porous material adsorbed with the functional substances to the crushed paper sheet to obtain a paper sheet with functional substances; the porous material is activated carbon, and the mesh number of the activated carbon is 80-300 mesh.

[0128] In step (A2) of the present invention, when method 2 is adopted, the amount of porous material is adjusted according to actual conditions, and usually the mass ratio of porous material to flavoring substance is 1:1.

[0129] The fragrance carrying capacity of the porous material is determined according to the pore properties and adsorption time of the porous material itself, and is combined with the flow state of the final fragrance carrying system to determine the fragrance carrying capacity.

[0130] In step (A3), the method for preparing the coating material mixed solution is: adding the coating material body into the solvent and stirring to prepare a coating material mixed solution with a mass concentration of 3%; the coating material body includes ethyl cellulose, and the solvent includes anhydrous ethanol;

[0131] In step (A3), the drying conditions during the coating process include drying in an oven or air-drying in dry air. The drying conditions in the oven are: placing in an oven at 60°C and baking for 15 minutes; the air-drying conditions in dry air are: placing in dry air at 60°C and air-drying for 10 minutes.

[0132] The paper substrate of the present invention is first crushed and then adsorbed. By crushing the paper substrate, more tiny concave-convex structures can be formed on its surface, thereby increasing the specific surface area. The increase in specific surface area increases the contact area between the paper substrate and the target adsorbent (smoking agent, tobacco extract, pigment), which is conducive to the adsorption process. At the same time, if the paper substrate itself has a certain adsorption capacity, the adsorption performance may be further improved after crushing. In addition, during the crushing process, the interaction force between fibers is enhanced to form a more compact structure, so that the paper substrate is easier to gather into a rod shape when subjected to external force.

[0133] The method for preparing the second stage aerosol generating substrate comprises the following steps:

[0134] (B1) Tobacco substances first absorb flavoring substances and smoke-generating substances;

[0135] (B2) mixing the tobacco material after the flavoring substance and the smoke-generating substance are adsorbed with the supporting fibers, and then adding a binder thereto to obtain a mixed slurry after mixing;

[0136] (B3) The mixed slurry is formed by extrusion or molding to obtain the second stage aerosol generating matrix.

[0137] In the preparation method of the second-stage aerosol generating matrix, in step (B2), the added amount of the supporting fiber is 5% of the total mass of the mixed slurry, and the added amount of the adhesive is 50% of the total mass of the mixed slurry; the length of the supporting fiber mixed with the tobacco material after adsorbing the flavoring substance and the smoke-generating substance is 0.5mm-5mm.

[0138] What is limited here is the length of the plant fiber added to the smoking tube or filter tube, not the length of the plant fiber raw material. This is because for the convenience of storage and transportation, the plant fibers currently used in the market are usually agglomerated into blocks, and a process of fiber disintegration is required when using them, that is, the agglomerated plant fibers need to be loosened. This process can be carried out in the following two ways: First, soak the agglomerated plant fibers in water and wait for the plant fibers to be untied, and then wet-grind them until the required fiber length is obtained. At this time, since the plant fibers mixed with tobacco substances cannot contain a large amount of water, the untied plant fibers are dehydrated again. Second, directly dry-grind the agglomerated plant fibers until the required fiber length is obtained, and then mix them with tobacco substances.

[0139] like Figure 2, in this embodiment, flavoring beads 51 are added to the filter unit. Flavoring substances are added to the aerosol generating matrix of the present invention, and flavoring beads are added to the filter element, wherein the flavoring beads in the filter element play a role in supplementing the aroma of the flavoring substances in the aerosol generating matrix and converting the flavor type in the middle and late stages of suction. Specifically, the flavoring substances in the aerosol generating matrix in the early stage of suction are smoke flavoring. When the consumer feels that the aroma supplement of the suction is insufficient, the beads can be manually pinched and broken, thereby flavoring the smoke in the second half, which plays the role of aroma supplement in the later stage. Furthermore, the aroma and flavor characteristics of the flavoring substances in the aerosol generating matrix and the flavoring beads in the filter element may be inconsistent, which plays the role of changing the style characteristics before and after suction. For example, the flavor characteristics of the flavoring substances in the aerosol generating matrix are fruity, while the flavor characteristics of the flavoring beads in the filter element are chocolate. In this way, when the consumer feels that the fruity style is not obvious when suctioning, the flavoring beads are manually pinched and broken, thereby changing to chocolate flavor in the second half of the suction process.

[0140] The aerosol generating system of this embodiment includes an aerosol generating device and the aerosol generating product with a multi-segment aerosol generating substrate as described in the first aspect of the present invention, wherein the first segment of aerosol generating substrate is 3 mm away from the second segment of aerosol generating substrate and does not contact the heater of the aerosol generating device.

[0141] In order to investigate the influence of the volume of the airflow channel of the first aerosol generating substrate and the volume ratio of the airflow channel of the second aerosol generating substrate on the amount of smoke, the airflow channel volumes of the first aerosol generating substrate prepared in this embodiment are 0.5%, 1%, 5%, 8%, 10%, 20%, 50%, 70%, and 90% of the volume of the first aerosol generating substrate, and correspondingly, the airflow channel volumes of the second aerosol generating substrate are 95%, 90%, 85%, 80%, 60%, 55%, 50%, 30%, and 10% of the volume of the second aerosol generating substrate, respectively. After the product samples were inhaled by professional sensory evaluation personnel, it was found that when the volume of the airflow channel of the first section of the aerosol generating matrix was 1%-10% of the volume of the first section of the aerosol generating matrix; correspondingly, the volume of the airflow channel of the second section of the aerosol generating matrix was 60%-90% of the volume of the second section of the aerosol generating matrix, the amount of smoke was relatively large, among which when the volume of the airflow channel of the first section of the aerosol generating matrix was 5% of the volume of the first section of the aerosol generating matrix; correspondingly, when the volume of the airflow channel of the second section of the aerosol generating matrix was 85% of the volume of the second section of the aerosol generating matrix, the amount of smoke was the largest. However, when the volume of the airflow channel of the first section of the aerosol generating matrix accounted for 50% of the volume of the first section of the aerosol generating matrix, and the volume of the airflow channel of the second section of the aerosol generating matrix accounted for 50% of the volume of the second section of the aerosol generating matrix, or when the volume of the airflow channel of the first section of the aerosol generating matrix was 90% of the volume of the first section of the aerosol generating matrix; correspondingly, when the volume of the airflow channel of the second section of the aerosol generating matrix was 10% of the volume of the second section of the aerosol generating matrix, the amount of smoke was relatively small. Therefore, in the present invention, the airflow channel volume of the first section of the aerosol generating matrix (i.e., the paper substrate rod part) is smaller, and the paper substrate is filled more tightly; while the airflow channel volume of the second section of the aerosol generating matrix (i.e., the smoke tube part) is larger. This design allows the gas in the airflow channel of the second section of the aerosol generating matrix to form a negative pressure due to the excessive flow rate during the inhalation process, thereby further extracting the aerosol generated in the first section of the aerosol generating matrix, further increasing the amount of smoke, and making the product's inhalation experience smoother and more comfortable.

Claims

1. An aerosol generating product having a multi-stage aerosol generating matrix, characterized in that: It includes a first-stage aerosol generating matrix, a second-stage aerosol generating matrix, a cavity unit, and a filter unit; The first stage aerosol generating substrate is a gathered paper substrate rod; The second section of aerosol generating substrate is an integrated smoke tube; The volume of the airflow channel of the first section of aerosol generating substrate is 1%-10% of the volume of the first section of aerosol generating substrate; The volume of the airflow channel of the second section of aerosol generating substrate is 60%-90% of the volume of the second section of aerosol generating substrate.

2. The aerosol-generating article according to claim 1, wherein The paper substrate stick comprises a paper substrate, a functional substance and a coating material; The paper substrate includes one or more of natural cellulose paper, composite paper, aluminum foil paper, and kraft paper; the gram weight of the paper substrate is 40-120 g / m 2 ; The functional substances include smoke-generating substances, flavoring substances, tobacco extracts and pigments; The coating material includes a coating material body and a solvent; the coating material body includes ethyl cellulose, shellac, and carnauba wax, and the solvent includes alcohols, and the alcohols include anhydrous ethanol; The smoking tube comprises tobacco material, flavoring material, smoking material and adhesive; The tobacco material includes one or more of tobacco powder or tobacco particles; The adhesive comprises a water-soluble adhesive; The smoke-generating substance includes one or more of glycerin, propylene glycol, sorbitol, and isopropyl palmitate; The flavoring substance includes one or more of menthol, ionone, ethyl maltol, vanillin, rose essential oil flavor or tobacco extract or nicotine salt.

3. The aerosol-generating article according to claim 2, wherein: When the paper substrate rod includes both a smoke-generating substance and a flavoring substance, based on mass percentage, the smoke-generating substance accounts for 20%-60% of the paper substrate rod, the flavoring substance accounts for 1%-10%, the tobacco extract accounts for 1%-10%, and the pigment accounts for less than 5%; When the smoke-generating tube includes both flavoring substances and smoking substances, based on mass percentage, the smoking substances in the smoke-generating tube account for 5%-15%, the flavoring substances account for 5%-30%, and the tobacco substances account for 30%-80%.

4. The aerosol-generating article according to claim 2, wherein: The smoke-generating tube also includes support fibers; The supporting fibers are selected from plant fibers, and the plant fibers include one or more of fluff pulp fibers, hemp pulp fibers, or wood pulp fibers; The structure of the smoke-generating tube is a tube body with one or more axial airflow channels; the tube wall thickness of the smoke-generating tube is 0.5 mm-1.5 mm.

5. The aerosol-generating article of claim 1, wherein: The cavity unit is a cavity formed by the outer wrapping paper of the aerosol generating article, or is an empty tube located inside the outer wrapping paper; The cavity unit may or may not have a vent hole.

6. The aerosol-generating article of claim 1, wherein: The length of the first section aerosol generating substrate and the second section aerosol generating substrate are both 6 mm to 12 mm.

7. A method for preparing an aerosol generating product having a multi-stage aerosol generating substrate according to any one of claims 2 to 6, characterized in that: The method for preparing the first stage aerosol generating substrate comprises the following steps: (A1) taking a paper substrate and treating the paper substrate by using an appropriate crushing process; (A2) adding a functional substance to the crushed paper substrate; (A3) preparing a coating material mixture, forming a coating layer on the outer side of the paper substrate having the functional substance by spraying or dipping, and drying to obtain a paper substrate having the functional substance and the coating material; (A4) Gathering the paper substrate with the functional substance and the coating material into a rod to obtain the first stage aerosol generating matrix.

8. The preparation method according to claim 7, characterized in that: In step (A2), the method of adding the functional substance to the crushed paper sheet comprises: Method 1: prepare a functional substance mixed solution, immerse the crushed paper sheet in the functional substance mixed solution for adsorption, and obtain a paper sheet with functional substances; Method 2: prepare a mixed liquid of functional substances, immerse the porous material in the mixed liquid of functional substances for adsorption, and then apply the porous material adsorbed with the functional substances to the crushed paper sheet to obtain a paper sheet with functional substances; the porous material includes activated carbon, ceramic molecular sieve inorganic materials, or polymer organic materials, or natural porous materials from plants.

9. The preparation method according to claim 7, characterized in that: In step (A3), the method for preparing the coating material mixture is: adding the coating material body into the solvent and stirring to prepare a coating material mixture with a mass concentration of 1-15%; the coating material body includes ethyl cellulose, shellac, and carnauba wax, and the solvent includes alcohols, and the alcohols include anhydrous ethanol; In step (A3), the drying conditions during the coating process include drying in an oven or air-drying in dry air. The drying conditions in the oven are: placing in an oven at 45-60°C and baking for 10-15 minutes; the air-drying conditions in dry air are: placing in dry air at 45-60°C and air-drying for 5-10 minutes.

10. An aerosol generating system, characterized in that: It comprises an aerosol generating device and an aerosol generating product having a multi-segment aerosol generating substrate as claimed in any one of claims 1 to 6, wherein the first segment of aerosol generating substrate is 2-6 mm away from the second segment of aerosol generating substrate and does not contact the heater of the aerosol generating device.

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