A paper-based sheet for electromagnetically heating an aerosol-generating article, and a method of making and using the same

Abstract

The present application relates to a paper-based sheet for electromagnetically heating an aerosol generating article, and a preparation method and application thereof. The paper-based sheet comprises a first paper layer and a high molecular cross-linking layer arranged in a stack, and the high molecular cross-linking layer is fixed with magnetic particles. By using the paper-based sheet with magnetic particles, the present application can effectively improve the perception rate of the electromagnetic heating smoking set to the heated cigarette. In addition, it can effectively prevent the migration of chemical substances during storage and heating, and avoid affecting the flavor of smoke and even the health of consumers. At the same time, since the high molecular cross-linking layer is cross-linked on site, the overall peel strength is improved, and the original production equipment can be directly connected.

Description

Technical Field

[0001] This invention relates to the field of heated cigarette technology, specifically to a paper-based sheet for electromagnetically heated aerosol-generated products, its preparation method, and its application. Background Technology

[0002] With increasing public awareness of health, heated cigarettes, as an alternative to traditional cigarettes, have gradually gained widespread market attention. These products generate an aerosol through heating rather than combustion, thereby releasing aroma and effectively avoiding the large amounts of harmful substances produced during the combustion of traditional cigarettes. They are considered a more environmentally friendly and healthier smoking alternative. The working principle of heated aerosol generators is to heat the atomizing agent to a certain temperature and release its aroma. To improve ease of use, more and more manufacturers are incorporating sensors into the cigarettes to achieve inductive heating of the tobacco.

[0003] CN115736381A discloses an electromagnetic induction identification heated cigarette with an easy-to-process, low-cost, and lightweight cigarette stick. The cigarette stick includes a cigarette stick and a heating device. An induction identification element is provided on the outer surface or inner layer of the cigarette stick, arranged in a ring around the circumference of the cigarette stick or in a strip along the length of the cigarette stick. The thickness of the induction identification element is 0.05-0.5 mm. The heating device includes a shell with a cavity, a power heating unit disposed on the inner wall of the cavity for heating the cigarette stick, a power supply, an electromagnetic induction unit for electromagnetic induction identification of the cigarette stick, and a switch device for activating the electromagnetic induction unit when the opening is slidably opened and deactivating the power supply when the opening is slidably closed. The device also includes an MCU processing unit that controls the heating temperature and heating time of the inserted cigarette stick by the power heating unit based on the signal detected by the electromagnetic induction unit, and a status unit indicating whether the electromagnetic induction unit is working and whether the power heating unit is working.

[0004] CN117338064A discloses an aerosol generating article. The aerosol generating article includes a hollow tube and a sensor; the hollow tube contains a fuming substance; the sensor includes: an elongated sensor portion extending axially along the hollow tube and a sensor end portion connected to the elongated sensor portion and located at the distal lip of the hollow tube; the elongated sensor portion is located within the hollow tube. The aerosol generating article of this invention has a sensor inserted in its fuming section, the sensor including an elongated sensor portion for inductive heating and a sensor end portion for sealing the end of the article. By coupling with an inductive magnetic field adapted to the sensor, the sensor can sense and heat the fuming substance within the article.

[0005] However, the aforementioned existing technologies require dedicated identification and sensing structures within the cigarette holder, which not only increases the complexity and production cost of the cartridges but also suffers from issues such as delayed identification response, slow heating start-up, and insufficient initial vapor production. Furthermore, electromagnetic identification and heating are susceptible to environmental and positional variations, exhibiting poor stability and difficulty in controlling heating uniformity, leading to localized overheating or insufficient heating, thus affecting the vaping experience and aerosol release stability. In addition, this solution places high demands on the cigarette device's circuitry and coil design, resulting in high overall cost and power consumption. Moreover, the cartridges are highly integrated with the device, hindering versatility, and there are potential odors and safety hazards associated with high-temperature metal components. Therefore, there is an urgent need in this field to find a healthy and safe cigarette sensing solution. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a paper-based sheet for electromagnetically heated aerosol-generated products, its preparation method, and its application.

[0007] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, the present invention provides a paper-based sheet for generating articles by electromagnetic heating aerosols, the paper-based sheet comprising a first paper layer and a polymer cross-linked layer stacked together, wherein magnetic particles are fixed on the polymer cross-linked layer.

[0008] Preferably, the mass ratio of the polymer crosslinking layer to the magnetic particles is 1:(0.75-1.5), for example, it can be 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3 or 1:1.4, etc.

[0009] Preferably, the magnetic particles are subjected to paramagnetic treatment.

[0010] Preferably, the angle between the magnetic field direction of the magnetic particles and the length direction of the electromagnetically heated aerosol-generated product is less than 30°, for example, it can be 2°, 5°, 8°, 10°, 12°, 15°, 18°, 20°, 22°, 25° or 28°, etc. The smaller the angle between the magnetic field direction and the insertion direction, the more significantly the sensing rate can be improved.

[0011] Preferably, the average particle size of the magnetic particles is 20-200 mesh, for example, it can be 30 mesh, 40 mesh, 50 mesh, 60 mesh, 70 mesh, 80 mesh, 90 mesh, 100 mesh, 110 mesh, 120 mesh, 130 mesh, 140 mesh, 150 mesh, 160 mesh, 170 mesh, 180 mesh or 190 mesh, etc.

[0012] Preferably, the magnetic paper-based sheet further includes a second paper layer, and the polymer cross-linked layer is stacked between the first paper layer and the second paper layer.

[0013] Preferably, the material of the polymer crosslinking layer includes PE and / or PLA.

[0014] Preferably, the basis weight of the first paper layer is 15-70 g / m³. 2 For example, it can be 20 g / m 2 25 g / m 2 30 g / m 2 32 g / m 2 35 g / m 2 40 g / m 2 45 g / m 2 50 g / m 2 55 g / m 2 60 g / m 2 Or 65 g / m 2 wait.

[0015] Preferably, the thickness of the first paper layer is 20-90 μm, for example, it can be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm or 80 μm.

[0016] Preferably, the quantitative amount of the polymer cross-linked layer is 20-60 g / m³. 2 For example, it can be 20 g / m 2 25 g / m 2 30g / m 2 32 g / m 2 35 g / m 2 40 g / m 2 45 g / m 2 50 g / m 2 55 g / m 2 60 g / m 2 Or 65 g / m 2 wait.

[0017] In this invention, the weight of magnetic particles is excluded from the quantitative determination of the polymer cross-linked layer.

[0018] Preferably, the thickness of the polymer crosslinking layer after curing is 20-60 μm, for example, it can be 20μm, 25μm, 30μm, 32μm, 35μm, 40μm, 45μm, 50μm, 55μm or 60μm, etc.

[0019] Preferably, the basis weight of the second paper layer is 15-70 g / m³. 2 For example, it can be 20 g / m 2 25 g / m 2 30 g / m 2 32 g / m 235 g / m 2 40 g / m 2 45 g / m 2 50 g / m 2 55 g / m 2 60 g / m 2 Or 65 g / m 2 wait.

[0020] Preferably, the thickness of the second paper layer is 20-60 μm, for example, it can be 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm or 55 μm.

[0021] Preferably, the magnetic particles are permanent magnets.

[0022] Preferably, the permanent magnet is a rare-earth sintered magnet.

[0023] Preferably, the rare earth sintered magnet is any one or a combination of at least two of neodymium iron boron, samarium cobalt, ferrite, or alnico.

[0024] Preferably, the magnetic particles have an anti-corrosion coating on their outer side.

[0025] In a second aspect, the present invention provides a method for preparing a paper-based sheet for electromagnetically heated aerosol-generated articles as described in the first aspect, the method comprising the following steps: (1) Prepare an initial liquid for forming a polymer crosslinking layer, wherein the magnetic particles are suspended and dispersed in the initial liquid; (2) The first paper layer is subjected to corona pretreatment to form surface grooves and / or pits; (3) The initial liquid is evenly distributed on the surface of the first paper layer using a coating device; (4) Before the initial liquid has solidified into the polymer crosslinking layer, the initial liquid is subjected to paramagnetic treatment so that the magnetic field direction of the magnetic particles is biased toward the width direction of the paper-based sheet. (5) The initial liquid is cured to obtain the paper-based sheet.

[0026] Preferably, step (4) further includes attaching a second paper layer to the surface of the initial paramagnetically treated liquid away from the first paper layer.

[0027] Thirdly, the present invention provides an electromagnetically heated aerosol generating article, wherein the electromagnetically heated aerosol generating article comprises, from the distal end to the proximal end, a distal filtration section, a smoke generating section and a filter tip section in sequence. The distal filtration section or smoke-generating section is independently formed by forming paper packaging, and then wrapped with splicing paper to form a splice. At least one of the forming paper or tipping paper is a paper-based sheet as described in the first aspect.

[0028] Preferably, the electromagnetically heated aerosol generating product further includes a cooling section, which is located between the smoke-generating section and the filter section.

[0029] Preferably, the remote filtration section, cooling section, or smoke generation section is independently formed by forming paper packaging, and then wrapped with splicing paper to form a splice.

[0030] In a preferred embodiment, the paper-based sheet is used in the distal filtration section, allowing for early detection during cigarette insertion into the smoking device. In another preferred embodiment, the paper-based sheet is used in the smoke-generating and / or cooling sections, minimizing the exchange of substances between the air or smoke passing through the cigarette and the sensing particles in the sheet, thus improving product safety.

[0031] Preferably, the total weight of magnetic particles in the paper-based sheet is 2.5-30 mg, for example, it can be 5 mg, 10 mg, 12 mg, 15 mg, 18 mg, 20 mg, 22 mg, 25 mg or 28 mg, etc.

[0032] Preferably, the distal filtration section and / or the cooling section are formed by aggregating the paper-based sheet described in the first aspect. The total weight of the magnetic particles in the paper-based sheet is 2.5-30 mg (e.g., 5 mg, 10 mg, 12 mg, 15 mg, 18 mg, 20 mg, 22 mg, 25 mg, or 28 mg, etc.). In a preferred embodiment, the distal filtration section is formed by aggregating the paper-based sheet, and the polymer cross-linked layer and two paper layers in the paper-based sheet encapsulate the magnetic particles, preventing the magnetic particles from exchanging substances with the air or smoke passing through the cigarette. In a preferred embodiment, the cooling section is formed by aggregating the paper-based sheet, and the polymer cross-linked layer in the paper-based sheet is preferably a phase change material such as PLA, to achieve further cooling.

[0033] Fourthly, the present invention provides an electromagnetic heating aerosol generation system, the electromagnetic heating aerosol generation system comprising the electromagnetic heating aerosol generation product and the electromagnetic heating aerosol generation device as described in the third aspect. The electromagnetic heating aerosol generating device includes a heating chamber, an electromagnetic coil, and a control circuit.

[0034] The control circuit is configured to determine the occurrence of the following events based on the interaction between the magnetic paper sheet and the electromagnetic coil: the electromagnetically heated aerosol-generated article is inserted into the heating chamber; and / or the electromagnetically heated aerosol-generated article is pulled out of the heating chamber.

[0035] Among them, aerosol-generating products are smoking products, including aerosol-forming matrix, which generates aerosols through heating that can be directly inhaled into the lungs of the user through the user's mouth.

[0036] Preferably, the aerosol forming matrix in the overall smoke-generating section is primarily a liquid-based first smoke-generating agent. Preferably, the first smoke-generating agent comprises nicotine or a nicotine salt. The solid aerosol forming matrix may also be contained in one or more capsules, which may melt during heating of the solid aerosol forming matrix or be broken by the consumer before use.

[0037] Preferably, the aerosol-forming matrix in the discrete smoke-generating section is primarily a solid aerosol-forming matrix, particularly comprising tobacco. This includes one or more of the following: powder, granules, pellets, fragments, strips, bars, or sheets; and contains one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco ribs, flat tobacco, and homogenized tobacco. For example, tobacco sheets, tobacco granules, or shredded natural tobacco or tobacco stems, particularly those known as homogenized tobacco sheets. Alternatively or additionally, it may include aerosol-forming materials that do not contain tobacco, such as paper sheets comprising nicotine salts and aerosol-forming agents. Alternatively, the solid aerosol-forming matrix may further comprise a second smoke-generating agent to enhance the smoke-generating effect.

[0038] In this invention, homogeneous tobacco material refers to a material formed by aggregating particulate tobacco.

[0039] In this invention, sheet refers to a layered element having a width and length substantially greater than its thickness.

[0040] In this invention, a sheet is assembled to describe a process of winding, folding, compressing, shrinking, wrinkling, or curling that is substantially transverse to the longitudinal axis of the aerosol-generating article.

[0041] In this invention, textured sheet refers to a sheet that has been rolled, embossed, stamped, perforated, or otherwise deformed. The aerosol forming matrix may comprise an aggregated textured sheet of homogeneous tobacco material, including a plurality of spaced-apart notches, protrusions, perforations, or combinations thereof. Preferably, the aerosol forming matrix comprises an aggregated rolled sheet of homogeneous tobacco material. The use of textured sheets of homogeneous tobacco material can advantageously promote the aggregation of homogeneous tobacco material sheets to form an aerosol forming matrix.

[0042] In this invention, a curled sheet refers to a sheet having a plurality of substantially parallel ridges or folds. Preferably, when the aerosol-generating article has been assembled, the substantially parallel ridges or folds extend along or parallel to the longitudinal axis of the aerosol-generating article. This advantageously promotes the aggregation of the curled sheet of homogeneous tobacco material to form an aerosol-forming matrix. However, it will be understood that the curled sheet for the homogeneous tobacco material contained in the aerosol-generating article may alternatively or additionally have a plurality of substantially parallel ridges or folds arranged at acute or obtuse angles to the longitudinal axis of the aerosol-generating article when the aerosol-generating article has been assembled.

[0043] The aerosol forming matrix can be in the form of a plug, which includes an aerosol forming material defined by paper or other packaging material. In the case where the aerosol forming matrix is ​​in the form of a plug, an integral plug comprising any packaging paper is considered to be an aerosol forming matrix.

[0044] Preferably, the aerosol-forming matrix includes a plug comprising an aggregate of homogeneous tobacco material or other aerosol-forming material surrounded by packaging. Preferably, the receptor is located within the plug in direct contact with the aerosol-forming material.

[0045] In this invention, a smoke-generating agent, i.e., an aerosol forming agent, is used to describe any suitable known compound or mixture of compounds that promotes aerosol formation in use and is substantially heat-resistant to degradation at the operating temperature of the aerosol-generating article. Suitable aerosol forming agents are known in the art and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glyceryl monoacetate, glyceryl diacetate, or glyceryl triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Preferred aerosol forming agents are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol. The aerosol forming matrix may comprise a single aerosol forming agent. Alternatively, the aerosol forming matrix may comprise a combination of two or more aerosol forming agents.

[0046] Preferably, the aerosol forming matrix has an aerosol forming agent content of more than 5% by dry weight. More preferably, the aerosol forming matrix may have an aerosol forming agent content between about 5% and about 30% by dry weight. In one embodiment, the aerosol forming matrix has an aerosol forming agent content of about 20% by dry weight.

[0047] Aerosol forming matrices, including those used to homogenize tobacco sheets in aerosol-generating articles, can be manufactured using existing manufacturing processes in the field, such as rolling, slurry, and papermaking.

[0048] Preferably, the aerosol forming article includes a distal filtration section, an integral smoke-generating section, a discrete smoke-generating section, a support section, an aerosol cooling section, and a filter section. Preferably, these sections are generally cylindrical and have substantially equal outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter between approximately 5 mm and approximately 12 mm, for example, between approximately 5 mm and approximately 10 mm, or between approximately 6 mm and approximately 8 mm. In a preferred embodiment, the outer diameter is 7.2 mm + / - 10%.

[0049] The distal filtration section or integral smoke-generating section is located upstream of the discrete smoke-generating section and can have a length between approximately 2 mm and approximately 8 mm, for example, between approximately 4 mm and approximately 6 mm, and can prevent smoke-generating cells from detaching from the distal end of the distal filtration section or discrete smoke-generating section.

[0050] The discrete smoke-generating section can have a length between approximately 5 mm and approximately 15 mm, for example, between approximately 8 mm and approximately 12 mm.

[0051] The support segment can be located directly downstream of the aerosol-forming matrix and adjacent to the discrete smoke-generating segment, and can prevent smoke-generating monomers from detaching from the proximal end of the discrete smoke-generating segment. The support element can be formed from any suitable material or combination of materials. For example, the support element can be formed from one or more materials selected from the group consisting of: cellulose acetate; paperboard; crimped paper, such as crimped heat-resistant paper or crimped parchment; and polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the support element is formed of cellulose acetate. The support element can include a hollow tubular element. In a preferred embodiment, the support element includes a medium cellulose acetate tube. The support element can have a length between approximately 5 mm and approximately 15 mm. In a preferred embodiment, the support element has a length of approximately 8 mm.

[0052] The aerosol cooling section can be located downstream of the aerosol forming matrix; for example, it can be located immediately downstream of and adjacent to the support section. Alternatively, the aerosol cooling section can be located between the support section and the filter section, with the filter section located at the very downstream end of the aerosol-generating article. The aerosol cooling section can have a total surface area between approximately 300 square millimeters per millimeter of length and approximately 1000 square millimeters per millimeter of length. In a preferred embodiment, the aerosol cooling section has a total surface area of ​​approximately 500 square millimeters per millimeter of length. The aerosol cooling section is alternatively referred to as a heat exchanger.

[0053] Preferably, the aerosol cooling section has low suction resistance. That is, preferably, the aerosol cooling section provides low resistance to air passing through the aerosol-generated article. Preferably, the aerosol cooling section has virtually no impact on the suction resistance of the aerosol-generated article.

[0054] The aerosol cooling section may include multiple longitudinally extending channels. These channels may be defined by a sheet material that has undergone one or more of curling, pleating, gathering, and folding to form the channels. Alternatively, the multiple longitudinally extending channels may be defined by a single sheet that has undergone one or more of curling, pleating, gathering, and folding to form multiple channels.

[0055] In some embodiments, the aerosol cooling section may include an aggregate of materials selected from the group consisting of: metal foil, polymeric materials, and substantially non-porous paper or paperboard. In some embodiments, the aerosol cooling section may include an aggregate of materials selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminum foil. In a preferred embodiment, the aerosol cooling element includes an aggregate of biodegradable materials. For example, an aggregate of non-porous paper or an aggregate of biodegradable polymeric materials (such as polylactic acid). All of the above polymeric materials can be used in the polymer crosslinking layer of this application.

[0056] The aerosol cooling section can be formed from aggregated sheets of material having a specific surface area between approximately 10 mm² / mg and approximately 100 mm² / mg by weight. In some embodiments, the aerosol cooling section can be formed from aggregated sheets of material having a specific surface area of ​​approximately 35 mm² / mg.

[0057] The aerosol cooling section may have circumferential ventilation holes that allow outside air to be introduced into the internal hollow space.

[0058] The aerosol generating article may include a filter section, i.e., a mouthpiece, located at the mouth end of the aerosol generating article. The mouthpiece may be located immediately downstream of and adjacent to an aerosol cooling section. The mouthpiece may include a filter. The filter may be formed of one or more suitable filter materials. Many such filter materials are known in the art. In one embodiment, the mouthpiece may include a filter formed of cellulose acetate tow.

[0059] The mouthpiece can have a length between approximately 5 mm and approximately 20 mm. In a preferred embodiment, the mouthpiece has a length of approximately 14 mm. The mouthpiece can also have a length between approximately 5 mm and approximately 14 mm. In a preferred embodiment, the mouthpiece has a length of approximately 7 mm.

[0060] The components of the aerosol-generating article (e.g., the aerosol-forming matrix and any other components of the aerosol-generating article, such as support sections, aerosol cooling sections, and mouthpieces) are surrounded by an outer packaging. The outer packaging is formed of any suitable material or combination of materials. Specifically, the outer packaging paper is cigarette paper, forming paper, tipping paper, and the innovative paper-based sheet proposed in this invention.

[0061] An aerosol generating device is used to describe an apparatus that interacts with an aerosol-forming matrix of an aerosol-generating article to generate an aerosol. Preferably, the aerosol generating device is a smoking device that interacts with the aerosol-generating matrix of the aerosol-generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth. The aerosol generating device may be a fixator for a smoking article.

[0062] A sensor is a material that can convert electromagnetic energy into heat. When placed in a fluctuating electromagnetic field, the eddy currents induced in the sensor cause it to heat up. In aerosol-forming articles, the sensor is positioned in thermal contact with the aerosol-forming matrix, which is then heated by the sensor.

[0063] The aerosol generating article is designed to engage with an electrically operated aerosol generating device, including an induction heating source. The induction heating source or sensor generates a fluctuating electromagnetic field to heat a sensor located within the fluctuating electromagnetic field. In use, the aerosol generating article engages with the aerosol generating device such that the sensor is located within the fluctuating electromagnetic field generated by the sensor.

[0064] The length of the receptor is greater than its width or thickness, for example, more than twice its width or thickness. Therefore, the receptor can be described as an elongated receptor. The receptor can be arranged generally longitudinally within the aerosol-generating matrix. This means that the length of the elongated receptor is arranged approximately parallel to the longitudinal direction of the aerosol-generating matrix, for example, within plus or minus 10 degrees. In a preferred embodiment, the elongated receptor can be located at a radial center position within the aerosol-generating matrix and extend along the longitudinal axis of the aerosol-generating matrix.

[0065] The receptor is preferably needle-shaped, strip-shaped, or leaf-shaped. Preferably, the receptor has a length of 5 mm to 15 mm, for example, between 6 mm and 12 mm or between 8 mm and 10 mm. Preferably, the elongated receptor has a length substantially the same as the aerosol-forming matrix. Preferably, the receptor can have a width of 1 mm to 5 mm and a thickness of 0.01 mm to 2 mm, for example, 0.5 mm to 2 mm. A preferred embodiment may have a thickness between 10 micrometers and 500 micrometers, more preferably between 10 micrometers and 100 micrometers. If the receptor has a constant cross-section, such as a circular cross-section, it has a preferred width or diameter of 1 mm to 5 mm.

[0066] The sensor can be made of any material capable of being heated inductively to a temperature sufficient to generate an aerosol matrix. Preferred sensors include metals or carbon. Preferred sensors may include ferromagnetic materials, such as ferrite, ferromagnetic steel, or stainless steel. Suitable sensors may be aluminum or may include aluminum. Preferred sensors may be made of 400 series stainless steel, such as grade 410, 420, or 430 stainless steel. Different materials will consume different amounts of energy when placed in an electromagnetic field with similar frequency and field strength. Therefore, parameters of the sensor, such as material type, length, width, and thickness, can be varied within a known electromagnetic field to provide the desired energy consumption.

[0067] The preferred sensor may be heated to a temperature exceeding 250 degrees Celsius. A suitable sensor may include a non-metallic core having a metallic layer disposed on the non-metallic core, such as metallic traces formed on the surface of a ceramic core.

[0068] The sensor may have an outer protective layer, such as a ceramic or glass protective layer encapsulating the elongated sensor, thereby forming a complete heating element. The sensor may include a protective coating formed of glass, ceramic, or inert metal on the core of the sensor material.

[0069] The sensors are arranged to be in thermal contact with the integral smoke-generating section and the discrete smoke-generating section. Therefore, when the sensors are heated, the integral and discrete smoke-generating sections are heated and form aerosols. Each integral and discrete smoke-generating section may contain one sensor; alternatively, multiple sensors may be included in each section. The sensor shapes may include elongated, granular, mesh-like, radial, tubular, hourglass-shaped, spiral, etc.

[0070] The aerosol generating device can generate a fluctuating electromagnetic field between approximately 1 MHz and 30 MHz, for example, between 2 MHz and 10 MHz, or for example, between 5 MHz and 7 MHz, through the induction coil of the induction emitter.

[0071] Preferably, the aerosol generating device is capable of generating a wave electromagnetic field with a field strength (H field) between 1 kA / m and 5 kA / m, for example between 2 kA / m and 3 kA / m, for example about 2.5 kA / m.

[0072] The induction coil material should be a material with good conductivity, such as metal; in addition, in this invention, the induction coil material should also have good elastic deformation ability, and can be metals such as spring steel, gold, and silver.

[0073] The movable coil support and fixed coil support of the induction coil can be connected to the induction coil body through methods such as integral molding, welding, or clamping. The displacement of the movable coil support can be achieved manually or by motor drive.

[0074] An aerosol generator is a portable or handheld device that can be comfortably held between the fingers of one hand. The shape of the aerosol generator is generally cylindrical. The aerosol generator can have a length between approximately 70 mm and approximately 120 mm.

[0075] The power source can be any suitable power source, such as a DC voltage source, like a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.

[0076] The control element can be a simple switch. Alternatively, the control element can be a circuit and may include one or more microprocessors or microcontrollers. The control unit can detect the current in the induction coil to control heating or sense the insertion of a cigarette.

[0077] An aerosol generation system may include an aerosol generation device and one or more aerosol generation articles, wherein the aerosol generation device is configured with a corresponding number of heating chambers to contain the aerosol generation articles.

[0078] In addition, permanent magnetic particles may also include: magnetic metals selected from the group consisting of cobalt (Co), iron (Fe), and nickel (Ni); magnetic alloys of iron, manganese, cobalt, nickel, or mixtures thereof; magnetic oxides of chromium, manganese, cobalt, iron, nickel, or mixtures thereof; or mixtures thereof. The term "magnetic" in relation to metals, alloys, and oxides refers to ferromagnetic or ferrimagnetic metals, alloys, and oxides. Magnetic oxides of chromium, manganese, cobalt, iron, nickel, or mixtures thereof can be pure or mixed oxides. Examples of magnetic oxides include, but are not limited to, iron oxides such as hematite (Fe2O3) and magnetite (Fe3O4), chromium dioxide (CrO2), magnetic ferrite (MFe2O4), magnetic spinel (MR2O4), and magnetic hexagonal ferrite (MFe2O4). 12 O 19 ), magnetic positive ferrite (RFeO3), magnetic garnet M3R2(AO4)3, where M represents a divalent metal, R represents a trivalent metal, and A represents a tetravalent metal. Permanent magnetic particles are preferably rare-earth sintered magnets such as neodymium magnets.

[0079] By employing the magnetic particle-based paper sheet of this invention, the sensing rate of heated cigarettes in electromagnetic heating devices can be effectively improved. Furthermore, it effectively prevents the migration of magnetic particles due to chemical substances during storage and heating, avoiding impacts on smoke flavor and even consumer health. Simultaneously, the on-site cross-linking of the polymer cross-linking layer enhances overall peel strength, allowing direct connection to existing production equipment without affecting the original cigarette splicing process.

[0080] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0081] Compared with the prior art, the present invention has the following beneficial effects: (1) The magnetic particle paper-based sheet of the present invention can effectively improve the sensing rate of the electromagnetic heating smoker to the heated smoke stick, and can also effectively prevent the tobacco or sheet from generating yellow spots due to chemical migration or oxidation reaction during storage and heating, thus avoiding affecting the flavor of the smoke and even the health of consumers.

[0082] (2) The magnetic particle paper-based sheet of the present invention has improved the overall peel strength by adopting a polymer cross-linking layer for on-site cross-linking. It can be directly connected to the original production equipment without affecting the original cigarette splicing process.

[0083] (3) The magnetic particle paper-based sheet of the present invention can provide bidirectional high barrier properties for heated cigarettes, while having good processing adaptability and thermal stability, realizing industrial production at the PPM level, and fully balancing the effect of preventing yellow spots, sensory effects and production efficiency. Attached Figure Description

[0084] The above-described technical content of the present invention and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solutions. In the drawings, the same reference numerals represent the same or similar elements.

[0085] Figure 1 This is a cross-sectional schematic diagram of a product generated from a heated aerosol. Figure 2 A schematic diagram showing the disassembly of the wrapping sheet for products generated by heated aerosols; Figure 3 This is a cross-sectional schematic diagram of the heated aerosol product in a heated aerosol generating device. Figure 4 This is a schematic diagram of the three-layer structure of a magnetic paper-based sheet. Figure 5 This is a schematic diagram illustrating the working principle of a paramagnetic device.

[0086] The reference numerals in the attached drawings are explained as follows: 100 Aerosol generating product (cigarette); 101 Smoke-generating section (tobacco section); 102 Filter section; 103 Distal filter section; 104 First cooling section (support section); 105 Second cooling section (hollow section); 106 Sensor; 111 Cigarette paper (smoke-generating section forming paper); 113 Distal filter section forming paper; 114 First cooling section forming paper; 121 Tipping paper; 200 Aerosol generating device; 210 Power supply and main control circuit; 220 Heating chamber; 230 Heating induction coil; 310 Paramagnetic device; 311 Paramagnetic device magnetic lines of force; 320 Magnetic paper base sheet; 321 Outer paper; 322 Inner paper; 323 Intermediate layer (polymer cross-linked layer); 324 Magnetic particles. Detailed Implementation

[0087] The following detailed description of the features and advantages of the present invention is sufficient to enable those skilled in the art to understand the technical content of the present invention and to implement it accordingly. Furthermore, based on this specification, claims, and drawings, those skilled in the art can easily understand the related objectives and advantages of the present invention.

[0088] The terminology and expressions used herein are for descriptive purposes only, and the invention should not be limited to these terms and expressions. The use of these terms and expressions does not imply the exclusion of any illustrative and descriptive equivalents (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0089] Please see Figure 1As shown, this is a specific embodiment of an electromagnetically heated aerosol generating article 100 of the present invention. In this embodiment, the electromagnetically heated aerosol generating article 100 is applied to, for example... Figure 3 In the electromagnetic heating smoke appliance 200 shown, an aerosol is formed by electromagnetic heating within the smoke appliance.

[0090] The aerosol generating article 100 typically includes a smoke-generating section 101 (i.e., a tobacco section) and a filter section 102. Depending on the requirements, the aerosol generating article 100 may also include one or more cooling sections, such as a support section 104 as a first cooling section and a hollow section 105 as a second cooling section.

[0091] The aerosol-generating product 100 may also be equipped with a distal filter section 103, the main function of which is to prevent tobacco from falling off during the heating process, thereby ensuring the integrity of the cigarette and the user experience. The distal filter section has a multi-hole structure, allowing external air to enter the cigarette from the distal end along the distal filter section. The distal filter section is usually made of clean cellulose acetate bundles or clean paper to ensure the purity of the incoming air.

[0092] The support section 104 is designed to enhance the overall structural stability of the cigarette, provide necessary physical support for the heating process, ensure that the cigarette maintains a stable shape during heating, and avoid uneven heating or abnormal smoke release due to loose structure.

[0093] In another embodiment, one or more sets of ventilation holes (not shown) may be formed in the circumferential direction of the hollow section 105 to achieve more efficient cooling. In another embodiment, the cooling section is made of a phase change material (e.g., PLA, wax) to absorb aerosol heat and thus achieve cooling.

[0094] like Figure 2 As shown, the tobacco segment 101 is typically formed by rolling cigarette paper 111, although in another embodiment, aluminum foil or aluminum foil paper can be used. The distal filter segment 103, support segment 104, and hollow segment 105 can all be formed by rolling forming paper, such as distal filter segment forming paper 113 and support segment forming paper 114. The main function of these wrapping papers is to shape the various segments; they are typically wound around the corresponding segments during individual processing to form independent structural units. Tipping paper 121 is wound around the outermost part of the wrapping paper, serving to connect the segments, enhance overall structural stability, and provide additional protection. All of these cigarette papers, forming papers, and tipping papers can be made from the magnetic paper-based sheet 320 provided in this invention.

[0095] like Figure 3As shown, the electromagnetic aerosol generating apparatus 200 is arranged to receive an aerosol generating article 100 that is electromagnetically heated to heat the receptor 106 in the aerosol generating article 100, thereby heating the smoke-generating section 101 to generate aerosol. The aerosol generating apparatus 200 includes a housing, a power supply and a main control circuit 210, a heating chamber 220 for receiving at least a portion of the aerosol generating article 100, and an induction coil 230 capable of generating electromagnetic fields to heat the receptor 106. In one embodiment, the induction coil 230 is controlled by the main control circuit 210 to heat the induction coil 230 to a specific power or a specific temperature profile. In one embodiment, the smoke-generating section 101 can achieve a heating temperature of 200°C-300°C. In one specific embodiment, when the aerosol generating article 100 is fully inserted into the heating chamber 220, the distal filter section 103, the smoke generating section 101, and the support section 104 are all located within the heating chamber 220, the induction coil 230 covers most of the smoke generating section 101 in the normal longitudinal direction, and the hollow section 105 is outside the heating chamber 220 so that external air can enter from the ventilation holes.

[0096] During the insertion of the aerosol-generating article 100 into the heating chamber 220, the change in the magnetic field caused by the magnetic paper-based sheet 320 can generate an induced current in the induction coil 230. The insertion of the cigarette can be confirmed by detecting the first electrical signal caused by this induced current. Typically, the electromagnetic aerosol generating device 200 is configured to turn on or start heating based on the first electrical signal. Conversely, during the removal of the aerosol-generating article 100 from the heating chamber 220, the change in the magnetic field caused by the magnetic paper-based sheet 320 can also generate an induced current in the induction coil 230. The removal of the cigarette can be confirmed by detecting the second electrical signal caused by this induced current. Typically, the electromagnetic aerosol generating device 200 is configured to turn off or stop heating based on the second electrical signal.

[0097] In one specific embodiment, the magnetic paper-based sheet 320 of the present invention adopts as follows: Figure 4 As shown, the magnetic paper-based sheet 320 consists of an inner paper layer 322, a middle layer 323, and an outer paper layer 321, forming a "sandwich" structure. The middle layer is a cross-linked polymer layer, and the material can be a food-grade film such as PE or PLA film, with multiple magnetic particles fixed within it. Furthermore, the middle layer 323 is a flexible polymer material with high chemical stability, resisting the erosion of various chemicals. It also possesses extremely low permeability, effectively preventing the penetration of moisture and liquids from tobacco segments or aerosol condensation, thus preventing non-food-grade magnetic particles from contaminating the tobacco segments or affecting the aerosol flavor. In addition, the middle layer 323 has good mechanical properties, including high tensile strength, elongation, and tear resistance, maintaining its integrity under a certain degree of deformation. Its temperature resistance is also excellent, allowing for use over a wide temperature range.

[0098] The following embodiments provide a detailed description of the manufacturing process of the magnetic paper-based sheet 320 of the present invention.

[0099] Example 1 of magnetic paper-based sheet preparation The magnetic paper-based sheet of this invention is completely different from the traditional tipping paper material; its outer paper uses a basis weight of 40 g / m³. 2 Traditional cigarette paper, the inner layer of which uses a basis weight of 80 g / m 2 Traditional formed paper, then through a basis weight of 30 g / m 2 The high-density PE polymer cross-linked layers are bonded together, and magnetic particles with an average particle size of 60 mesh (≤200 mesh) are embedded in the PE polymer cross-linked layers, forming a total weight of approximately 160 g / m³. 2 A new type of wrapping sheet #1.

[0100] Its specific manufacturing process includes the following steps: Step S1 (Preparing the Initial Solution): The food-grade PE film raw material is melted in a heating tank at a temperature controlled between 72 and 80°C to form a PE film-forming solution. Magnetic particles are added to this solution at a ratio of 1000g of magnetic particles to 1000g of PE, and the mixture is stirred. Based on extensive experimental experience, at least 750g of magnetic particles should be mixed into each 1000g of PE; otherwise, the required film-forming solution will be too thick to form cigarettes. Due to the high viscosity of the PE film-forming solution, the magnetic particles can be dispersed relatively evenly within it.

[0101] Step S2 (Corona Pretreatment): The inner and outer paper layers are subjected to corona treatment to form grooves or pits on the surface of the paper. The depth of the grooves or pits is controlled at 10-20% of the paper thickness to strengthen the bonding force between the inner and outer paper layers and the PE layer.

[0102] Step S3 (Outer Paper Coating Process): Add film-forming liquid to the coating equipment. Stir and roll up a layer of film-forming liquid using the adhesive roller located above the heating tank. The doctor blade located on one side of the adhesive roller scrapes the film-forming liquid rolled up by the adhesive roller to a thickness of about 35 μm. The corresponding PE polymer crosslinking layer has a basis weight of 30 g / m2 (excluding magnetic particles). Press the paper to adhere to the adhesive roller. At this time, the film-forming liquid rolled up by the adhesive roller coats the outer paper, forming intermolecular connections (rather than adhesive bonding). At the same time, the film-forming liquid with casting properties fully fills the grooves or pits on the outer paper.

[0103] Step S4 (paramagnetic process): Before the film-forming liquid has solidified into the polymer cross-linked layer, the film-forming liquid is subjected to paramagnetic treatment, so that the magnetic field direction of the magnetic particles therein is biased towards the width direction of the paper-based sheet 320. For example... Figure 4As shown, the paper-based sheet 320 with magnetic particles is conveyed from the coating equipment 310 to the cooling equipment in the direction of arrow B. It first passes through the paramagnetic device 310. The paramagnetic device is equipped with an electromagnetic component, which can generate a magnetic field (magnetic lines 311) in the width direction of the paper-based sheet 320. This magnetic field can cause the magnetic particles to rotate so that the magnetic field direction is along the width direction. The viscosity of the film-forming liquid can also hinder the large displacement of the magnetic particles.

[0104] Step S5 (Inner Layer Paper Composite Process): Immediately attach the inner layer paper to the outer layer paper that has been coated with film-forming liquid, and roll it with rollers so that the film-forming liquid fully fills the grooves or depressions on the inner layer paper to form a three-layer composite structure.

[0105] Step S5 (Cooling and Molding Process): The three-layer composite structure is sequentially conveyed to a hydraulic press for further compaction, and then conveyed to a cooling machine for cooling treatment, with the cooling temperature controlled at 10-15℃. This yields the paper-based sheet #1 of the present invention.

[0106] Example 2-14 of magnetic paper-based sheet preparation Following the process of Example 1 for preparing paper-based sheets, paper-based sheets #2-#14 were manufactured according to the materials in Table 1.

[0107] Table 1 in: In Preparation Example 7, there was no outer paper; the initial liquid was sprayed onto the inner paper and then cured.

[0108] In Preparation Example 9, there was no inner paper; the initial liquid was sprayed onto the outer paper and cured.

[0109] Preparation of Comparative Example 1 The prepared quantity is 70 g / m 2 Traditional tipping paper, used as wrapping sheet #A.

[0110] Preparation of Comparative Example 2 Referring to Chinese invention patent CN107536100B, the total amount prepared is 70 g / m³. 2 The composite forming paper of "forming paper-aluminum foil" is used as wrapping sheet #B. The basis weight of the forming paper is 30 g / m². 2 The basis weight of the aluminum foil is 30 g / m 2 The rest is adhesive.

[0111] Preparation of Comparative Example 3 Referring to Chinese invention patent CN1943456A, the total amount prepared is 70 g / m³. 2 The composite forming paper of "forming paper-PE-forming paper" is used as the wrapping sheet #C. The basis weight of the two forming paper layers is 25 g / m².2 The basis weight of the PE film was 10 g / m 2 The rest are adhesives.

[0112] Test Example 1: Visual Sensory Test of Paper-Based Sheets Visual sensory tests were conducted on magnetic paper-based sheets #1-#14 and wrapping sheets #A-#C, visually inspecting surface smoothness, color, etc. Magnetic paper-based sheets #1-#9, #11, #12, and #14, and wrapping sheets #A-#C all met the requirements for conventional cigarette paper. Magnetic paper-based sheet #10 had a poor appearance because, in Preparation Example 10, the amount of magnetic particles was too large, resulting in uneven distribution within the paper-based sheet and noticeable black spots. Magnetic paper-based sheet #13 also had a poor appearance because, in Preparation Example 13, the magnetic particles had a large particle size and strong mutual attraction, preventing sufficient dispersion in the initial liquid and resulting in very uneven distribution within the paper-based sheet and noticeable black spots.

[0113] Examples 1-10 Using magnetic paper-based sheet #1, the cigarette paper, distal filter section forming paper, support section forming paper, and tipping paper in commercially available TEREA heated cigarettes were replaced according to Table 2 (√ indicates the replacement location), and the sensor in the TEREA heated cigarettes was removed, resulting in batches of cigarettes @1-@5. Since magnetic paper-based sheet #1 has a magnetic field in the width direction, cigarettes @1-@5 have a magnetic field in the length direction.

[0114] Using wrapping sheet #A, the cigarette paper, distal filter section forming paper, support section forming paper, and tipping paper in commercially available TEREA heated cigarettes were replaced according to Table 2 (√ indicates the replacement location), and the sensor in the TEREA heated cigarettes was removed, resulting in batches of cigarettes @6-@10. Since wrapping sheet #A does not have a magnetic field, cigarettes @6-@10 also do not have a magnetic field.

[0115] Table 2 The main components of the commercially available TEREA heated cigarette have the following dimensions: overall length 52.5mm, outer diameter 7mm, distal filter section length 5.5mm, tobacco section length 11mm, sensor width 4mm, support section length 8.5mm, inner diameter 4.5mm, cooling section length 10mm, inner diameter 5mm, and filter section length 12.5mm.

[0116] Test Example 2: Cigarette Sensing and Heating Test Cigarettes @1-@10 were placed into a commercially available IQOS ILUMA smoking device for an automatic heating test. After 20 seconds of heating, the cigarettes were removed and touched to check if they were hot. It was found that cigarettes @1-@4 could be detected by the smoking device and have their automatic heating function activated, but none of the cigarettes showed significant heating. Cigarettes @1 and @4, because they cover the distal filter section, were more easily detected due to the larger change in magnetic flux they caused, resulting in a very rapid detection process. Cigarette @3 could be detected, but the insertion action needed to be quick, and the cigarette needed to be pressed down as much as possible, because the induction coil mainly surrounds the smoke-generating section, so the magnetic particles had a smaller effect. Cigarette @5 could also be detected by the smoking device and have its automatic heating function activated because the tipping paper was fully inserted into the heating chamber, generating a larger induced current.

[0117] It was found that cigarettes @6-@10 could not be detected by the smoking device and the automatic heating function could not be activated.

[0118] The total weight of the magnetic particles in cigarette @1 is approximately 1.1 mg. Based on experience, the total weight of the magnetic particles in each cigarette should be set between 0.5 and 2.0 mg to make it easily perceptible and to ensure a better overall appearance of the cigarette.

[0119] Examples 11-24 The cigarette paper in commercially available TEREA heated cigarettes was replaced with magnetic paper-based sheets #1-14, and the sensor in the TEREA heated cigarettes was replaced with a sensor made of ferritic stainless steel 304 of the same size, resulting in batches of cigarettes @11-@24. Because the magnetic paper-based sheets #1-14 have a magnetic field in the width direction, the cigarettes @11-@24 have a magnetic field in the length direction.

[0120] Test Example 3: Cigarette Sensing and Smoke Generation Test Cigarettes @11-@24 were placed in commercially available IQOS ILUMA smoking devices (similar test results were observed in other commercially available electromagnetic heating smoking devices with cigarette detection functions) for automatic heating testing. The smoking performance was evaluated using standard puffing methods, and the results showed: Except for cigarette @15, all other cigarettes can be detected by the smoking device and the automatic heating function can be activated, indicating that the ferrite Y10 used in paper-based sheet #5 has weak magnetism and is insufficient to generate a sufficient change in magnetic flux.

[0121] Except for cigarette @15, the smoke emitted by the other cigarettes after heating is basically consistent with the original cigarettes.

[0122] Apart from cigarettes @13 and @14, there are occasional instances where the removal of other cigarettes after use is not detected. This is presumably due to the demagnetization of neodymium iron boron after high-temperature heating.

[0123] Test Example 4: Magnetic Particle Rust Spot Test Cigarettes @11 and @17-@19 were stored at room temperature and humidity for two months, then disassembled and visually inspected for rust spots on the magnetic particles. The experiment revealed that cigarettes @18 and @19, due to the lack of an inner paper layer or an excessively thin inner paper layer, allowed the smoke-generating agent to penetrate, causing rust spots on the magnetic particles. Cigarette @17, although protected by an inner paper layer, still showed a small amount of rust spots due to the absence of an outer paper layer. Cigarette @11, with its thicker and denser inner and outer paper layers and an additional protective PE layer, did not develop rust spots during its shelf life.

[0124] Further tasting of cigarette @11 revealed that the flavor met expectations and had no off-odors. Cigarettes @17-@19 showed visible rust spots, which may affect health, so no further tasting tests were conducted.

[0125] Example 25 The magnetic paper-based sheet #1 is folded and gathered along its length to form a cylindrical segment, which is used to replace the distal filter section and its forming paper in TEREA heated cigarettes, resulting in a batch of cigarettes @25. Because the magnetic paper-based sheet #1 has a magnetic field in the width direction, the cigarettes @25 have a magnetic field in the length direction.

[0126] Example 26 The magnetic paper-based sheet #1 is folded and gathered along its length to form a cylindrical segment, which is used to replace the support segment in the TEREA heated cigarette (the suction resistance of both must be equivalent), resulting in a batch of cigarettes @26. Since the magnetic paper-based sheet #1 has a magnetic field in the width direction, the cigarettes @26 have a magnetic field in the length direction.

[0127] Example 27 40 mg of ferrite magnetic powder Y10 was directly and uniformly mixed into cellulose acetate tow to form cylindrical segments, which were used to replace the distal filter segment in TEREA heated cigarettes, resulting in batches of cigarettes @27. Because the magnetic field angle of the magnetic powder is random, cigarettes @27 do not have a specific magnetic field orientation.

[0128] Test Example 5: Magnetic Particle Rust Spot Test Cigarettes @25-@27 were stored at room temperature and humidity for two months, then disassembled and visually inspected for rust spots on the magnetic particles. The experiment revealed that the magnetic particles in cigarettes @25 and @26, protected by a double-layered paper and a polymer cross-linking layer, were not penetrated by the smoking agent, and therefore did not develop rust spots. In cigarette @27, however, the magnetic particles were exposed within the cigarette bundle, which absorbed the smoking agent, leading to rust spots on the magnetic particles.

[0129] Further tasting of cigarettes @25 and @26 revealed that the flavor met expectations and there were no off-odors. Cigarette @27 was not further tested due to visible rust spots, which may pose a health risk.

[0130] Test Example 6: Cigarette Sensing and Smoke Generation Test Cigarettes @25-@27 were placed in commercially available IQOS ILUMA smoking devices for automatic heating testing, and the smoking experience was evaluated using conventional smoking methods. Both cigarettes @25 and @27 can be detected by the smoking device and have their automatic heating function activated. Among them, cigarette @26 contains PLA as a phase change material, so the temperature of the first puff of smoke after heating is relatively lower than that of other cigarettes, and the style of the smoke emitted is basically consistent with the original cigarette.

[0131] The cigarette @27 only occasionally gets detected by the smoking device after multiple attempts, indicating that the ferrite Y10 used in the paper-based sheet #5 has weak magnetism and a chaotic magnetic field direction, which is insufficient to generate enough magnetic flux change.

[0132] The applicant declares that this invention illustrates a paper-based sheet for electromagnetically heated aerosol-generated products, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

[0133] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0134] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A paper-based sheet for producing articles by electromagnetic heating aerosol, characterized in that, The paper-based sheet includes a first paper layer and a polymer cross-linked layer stacked together, and magnetic particles are fixed on the polymer cross-linked layer.

2. The paper-based sheet for electromagnetically heated aerosol-generated products as described in claim 1, characterized in that, The mass ratio of the polymer cross-linked layer to the magnetic particles is 1:(0.75-1.5); Preferably, the magnetic particles are subjected to paramagnetic treatment; Preferably, the angle between the magnetic field direction of the magnetic particles and the length direction of the electromagnetically heated aerosol-generated product is less than 30°. Preferably, the magnetic particles have an average particle size of 20-200 mesh.

3. The paper-based sheet for electromagnetically heated aerosol-generated articles as described in claim 1 or 2, characterized in that, The magnetic paper-based sheet further includes a second paper layer, and the polymer cross-linked layer is stacked between the first paper layer and the second paper layer; Preferably, the material of the polymer crosslinking layer includes PE and / or PLA.

4. The paper-based sheet for electromagnetically heated aerosol-generated articles as described in any one of claims 1-3, characterized in that, The basis weight of the first paper layer is 15-70 g / m³. 2 ; Preferably, the thickness of the first paper layer is 20-90 μm; Preferably, the quantitative amount of the polymer cross-linked layer is 20-60 g / m³. 2 ; Preferably, the thickness of the polymer crosslinked layer after curing is 20-60 μm.

5. The paper-based sheet for electromagnetically heated aerosol-generated articles as described in claim 3, characterized in that, The basis weight of the second paper layer is 15-70 g / m³. 2 ; Preferably, the thickness of the second paper layer is 20-60 μm.

6. The paper-based sheet for producing articles by electromagnetic heating aerosol as described in any one of claims 1-5, characterized in that, The magnetic particles are permanent magnets; Preferably, the permanent magnet is a rare-earth sintered magnet; Preferably, the rare earth sintered magnet is any one or a combination of at least two of neodymium iron boron, samarium cobalt, ferrite, or alnico; Preferably, the magnetic particles have an anti-corrosion coating on their outer side.

7. A method for preparing a paper-based sheet for electromagnetically heated aerosol-generated articles as described in any one of claims 1-6, characterized in that, The preparation method includes the following steps: (1) Prepare an initial liquid for forming a polymer crosslinking layer, wherein the magnetic particles are suspended and dispersed in the initial liquid; (2) The first paper layer is subjected to corona pretreatment to form surface grooves and / or pits; (3) The initial liquid is evenly distributed on the surface of the first paper layer using a coating device; (4) Before the initial liquid has solidified into the polymer crosslinking layer, the initial liquid is subjected to paramagnetic treatment so that the magnetic field direction of the magnetic particles is biased toward the width direction of the paper-based sheet. (5) The initial liquid is cured to obtain the paper-based sheet.

8. The preparation method according to claim 7, characterized in that, Step (4) also includes attaching a second paper layer to the surface of the initial paramagnetically treated liquid on the side away from the first paper layer.

9. An electromagnetically heated aerosol-generating product, characterized in that, The electromagnetically heated aerosol-generated product comprises, from the distal end to the proximal end, a distal filtration section, a smoke-generating section, and a filter section. The distal filtration section or smoke-generating section is independently formed by forming paper packaging, and then wrapped with splicing paper to form a splice. At least one of the forming paper or tipping paper is a paper-based sheet as described in any one of claims 1-6.

10. An electromagnetic heating aerosol generation system, characterized in that, The electromagnetic heating aerosol generation system includes the electromagnetic heating aerosol generation product and the electromagnetic heating aerosol generation device as described in claim 9. The electromagnetic heating aerosol generating device includes a heating chamber, an electromagnetic coil, and a control circuit.

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