Electromagnetic heating cartridge with improved performance and method of making same

Abstract

The invention provides an electromagnetic heating cartridge with improved performance and a manufacturing method thereof, the electromagnetic heating cartridge comprises a hollow support tube and a heating tube, the size of the heating tube is smaller than that of the support tube, and the heating tube is nested in the support tube; an aerosol forming substrate is arranged in a hollow cavity of the heating pipe, and magnetic metal foil is arranged on the wall of the heating pipe. Through function separation of the mechanical supporting tube and the heating tube which are designed in a nested mode, not only is the production process simplified and the universality enhanced, but also the coupling stability of the receptors and a high-frequency alternating electromagnetic field is ensured and the heating efficiency is improved due to symmetrical distribution of the annular foil receptors and a mode of performing electromagnetic circumferential heating from the interior of the smoke cartridge.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-not-burn tobacco, and in particular to an electromagnetic heating cigarette cartridge with improved performance and a manufacturing method thereof. Background Art

[0002] Electromagnetic heating without burning technology is known in the heated cigarette industry. It requires the use of ferromagnetic or ferrimagnetic receptors as heat sources, which are stimulated by the high-frequency alternating electromagnetic field generated by the coil in the cigarette device, thereby generating eddy current heating, baking the aerosol-generating matrix in the cigarette cartridge and releasing smoke for inhalation. There are two configurations of commercially available products based on the structural design of the cigarette cartridge and the heating mode, including internal electromagnetic central heating and external electromagnetic circumferential heating.

[0003] In the application of internal electromagnetic central heating, a commercial product adopts the method of including a sensor in a cigarette cartridge, that is, a thin sheet sensor is embedded in the central area of ​​the aerosol generating matrix column, and the sensor is longitudinally distributed along the axis. When the cigarette cartridge is inserted into the cigarette cartridge compartment of the smoking device and works normally, the heat generated by the thin sheet sensor is conducted from the central area of ​​the aerosol generating matrix to the outer area. In this case, the embedding process of the thin sheet sensor is difficult, and it is difficult to accurately locate it on the axis of the aerosol generating matrix. In addition, its contact area with the aerosol generating matrix is ​​limited, making it difficult to achieve rapid heating and uniform carbonization effect.

[0004] In the application of external electromagnetic circumferential heating, the smoking device contains a receptor, but the cigarette cartridge does not contain a receptor, that is, the receptor is prepared in a cylindrical shape and integrated into the inner surface of the cigarette cartridge compartment. When the cigarette cartridge is inserted into the cigarette cartridge compartment and works normally, the heat generated on the cylindrical receptor is conducted from the inner surface of the cigarette cartridge compartment to the circumferential outer surface (side) of the cigarette cartridge, and after penetrating the cigarette cartridge paper tube, it is further conducted to the inside of the aerosol generating matrix. In this case, the air gap between the outer side of the cigarette cartridge and the inner surface of the cigarette cartridge compartment and the heat absorption of the cigarette tube itself are large, resulting in a large heat loss that does not act on the aerosol generating matrix, a slow smoke output speed, and the first few puffs will have small smoke volume and papery taste, resulting in a poor user experience.

[0005] It can be seen that both the internal electromagnetic central heating and the external electromagnetic circumferential heating configurations have their functional defects, and it is particularly necessary to propose the electromagnetic heating cigarette cartridge tube and its cigarette cartridge with improved performance as described in the present application. Summary of the invention

[0006] To solve the aforementioned problems in the prior art, the present invention provides an electromagnetic heating cartridge, comprising a hollow support tube and a heating tube. The size of the heating tube is smaller than that of the support tube, and the heating tube is nested inside the support tube. An aerosol-forming matrix is provided in the hollow cavity of the heating tube, and a magnetic metal foil is provided on the wall of the heating tube for circumferential electromagnetic induction heating of the aerosol-forming matrix from the inside of the cartridge and to prevent leakage.

[0007] Further, the heating tube is formed by winding a metal paper formed by a strong magnetic metal foil and a lining paper, and the strong magnetic metal foil is at least partially provided on the inner wall.

[0008] Further, the lining paper is a heat-modified paper or a tobacco-modified paper, and one or more of nicotine, nicotine salts or tobacco components are incorporated into the lining paper.

[0009] Further, the length of the heating tube is smaller than the length of the support tube, and the outer diameter of the heating tube is smaller than the outer diameter of the support tube.

[0010] Further, it further comprises a plug and a temperature-reducing member respectively abutting against both ends of the heating tube.

[0011] Further, the metal foil is configured to have a symmetric structure, and the ratio of S 有效加热面积 to S 加热管内壁面积 is greater than 30%.

[0012] Further, a high-permeability membrane is provided at one end of the heating tube close to the mouthpiece.

[0013] The present invention also provides a manufacturing method of an electromagnetic heating cartridge, comprising: raw paper preparation, compounding a strong magnetic metal foil and a thin lining paper to form a metal paper; winding, winding the metal paper to form a heating tube strip and winding ordinary paper to form a support tube strip; shaping and cutting, shaping the heating tube strip and the support tube strip and then cooling to room temperature, and cutting into required lengths; assembling, embedding the heating tube into the support tube, and providing a plug at the end of the heating tube; filling, filling the aerosol-forming matrix into the heating tube.

[0014] Further, after the filling step, it further comprises encapsulation, providing a temperature-reducing member or a high-permeability membrane at the other end corresponding to the plug, and assembling a cartridge mouthpiece.

[0015] Further, the thin lining paper is formed by compounding tobacco paper and cigarette paper.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By separating the functions of the mechanical support tube and the heating tube through a nested design, not only the production process is simplified and its universality is enhanced, but also due to the symmetric distribution of the annular foil sensors and the mode of circumferential electromagnetic heating from the inside of the cartridge, the coupling stability between the sensors and the high-frequency alternating electromagnetic field is ensured, and the heating efficiency is improved. By adding a foil on the inner surface of the cigarette tube and then winding it, the problem of difficult operation is solved, which is beneficial to large-scale manufacturability. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the nested structure magnetic cigarette tube structure;

[0018] Figure 2 It is a schematic diagram of the cartridge structure for loading granular aerosol generating matrix;

[0019] Figure 3 It is a micrograph of the cross-section of the heating tube metal paper. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1

[0022] As Figure 1 shown, it is a schematic diagram of a nested structure magnetic cigarette tube structure, including a hollow heating tube 1, a support tube 2, a plug 3 and a mouthpiece 4. The size of the heating tube 1 is smaller than that of the support tube 2, and the heating tube 1 is nested inside the support tube 2 by physical interference fit near one end. The heating tube 1 is selected with a length of 12 mm and an outer diameter of 6.4 mm, the support tube 2 is selected with a length of 45 mm and an outer diameter of 7 mm, and the plug 3 and the mouthpiece 4 are respectively abutted against both ends of the heating tube 1 and fixed thereto. The selection of the above outer diameter and length is mainly for the application of heat-not-burn, considering various factors such as the size of the cartridge chamber, the volume of the coil winding, and the assembly. The specific outer diameter and length are selected according to the actual situation.

[0023] In other embodiments, when the heating tube 1 is nested inside the support tube 2, in addition to interference fit, it can also be bonded by glue, pressed, buckled, etc. Preferably, glue bonding is used, and the types of adhesives selected include silicone adhesives, epoxy resin adhesives, acrylic adhesives, polyurethane adhesives, and rubber adhesives. An important performance index of these adhesives is that they must be able to withstand a certain high temperature, up to 400 °C, without significant deformation or release of toxic and harmful substances. To meet the harm reduction requirements of the cartridge, it is crucial for the present invention to use food-grade adhesives.

[0024] The inner wall of the heating tube 1 is provided with a magnetic metal foil 101, and the metal foil 101 is configured as a symmetric annular metal foil. In a specific embodiment, the heating tube 1 is a composite magnetic tube, and its base paper is a metal paper, which is composed of a strong magnetic metal foil 101 and a backing paper 102, and at least part of the strong magnetic metal foil 101 is exposed on the inner side of the heating tube 1. In a feasible way, the metal foil 101 is configured as a symmetric annular metal foil, and the annular metal foil winds around the inner wall of the heating tube 1 to form a complete circumferential heating configuration inside the cartridge. In the case of no obvious air gap, the heat energy directly and quickly acts on the internal aerosol formation matrix in direct contact with the sensor, avoiding the aforementioned disadvantages of the circumferential heating application from the outside of the cartridge, namely serious heat loss and very slow heating speed, which are caused by two reasons: air gap and energy penetrating the cigarette tube from outside to inside. In another feasible way, the metal foil 101 is not a complete annular structure, but is configured to have other geometric shape structures with symmetry, such as oval, triangular, irregular shapes, etc. However, considering the heating effect, the ratio of the geometric shape structure S 有效加热面积 to S 加热管内壁面积 is greater than 30% to achieve a better heating effect, preferably more than 50%.

[0025] In one embodiment, the metal paper includes 1 layer of strong magnetic metal foil 101, the thickness of the strong magnetic metal foil 101 is 0.015 mm, and the single-layer thickness of the backing paper 102 is 0.08 mm, and they are wound to form a hollow heating tube strip. In another embodiment, the metal paper includes 2 layers or more of strong magnetic metal foil 101, and they are wound to form a hollow heating tube strip with stronger magnetic sensing ability.

[0026] In a preferred solution, the thickness of the strong magnetic metal foil 101 is in the range of 0.003 - 0.03 mm, and the single-layer thickness of the backing paper 102 is in the range of 0.01 - 0.1 mm. A more preferred solution is to control the thickness of the strong magnetic metal foil 101 between 0.015 - 0.02 mm and the single-layer thickness of the backing paper 102 between 0.04 - 0.08 mm, in order to achieve the best balance between electromagnetic performance and mechanical performance. In order to ensure the strength of electromagnetic field coupling and endow it with a certain mechanical strength, the selection of the thickness of the metal foil 101 and the backing paper 102 in the present invention is crucial.

[0027] Among them, in view of the inevitable contact between the strongly magnetic metal foil 101 and part of the backing paper 102 during the circumferential heating process, which in turn causes the backing paper 102 to be heated, the backing paper 102 is selected from tobacco-modified paper, that is, nicotine, nicotine salts or tobacco components are incorporated therein, which is beneficial to reducing the peculiar smell caused by the heating of the backing paper 102. The tobacco-modified paper refers to a paper in which tobacco plants are added to the raw materials of the backing paper 102, and when it is heated, it mainly releases tobacco components. When the tobacco-modified paper reaches a high temperature of 300-400 °C, part of the tobacco components contained therein will be carbonized and pyrolyzed, releasing the unique smell of tobacco. This smell is combined with the aerosol flavor to form a comprehensive taste, which is usually acceptable to users. In another embodiment, the backing paper 102 is selected as heat-modified paper, which exhibits excellent thermal stability when reaching a high temperature of 300-400 °C. It will neither burn or undergo a violent pyrolysis reaction to release harmful substances or produce an unpleasant smell, nor will there be obvious deformation or color change phenomena.

[0028] The strongly magnetic metal foil 101 is selected as 4J42 iron-nickel soft magnetic alloy and configured as a single-layer structure. In another embodiment, the strongly magnetic metal foil 101 adopts a composite metal material and is configured as a three-layer structure, and its final composition is: a Cr layer with a thickness of 0.001 mm, a Ni layer with a thickness of 0.004 mm, and a stainless steel 410 layer with a thickness of 0.01 mm. This structure is used as a composite sensor component to further assist the smoking device to achieve various functions, such as anti-counterfeiting identification, temperature control, and puff count recording.

[0029] The support tube 2 is a single tube, and its base paper is ordinary paper, for example, a three-layer medium-weight paper with a weight of 80 grams is selected. In other embodiments, the main pulp of the conventional paper is taken from plant fibers, and its original sources are extensive, including coniferous woods (such as larch, Korean pine, masson pine, Yunnan pine, Mongolian pine, etc.), broad-leaved woods (such as poplar, birch, eucalyptus), herbaceous plants (such as reed, bamboo, Miscanthus, wheat straw, rice straw, Chinese alpine rush, sorghum stalk, bagasse), bast fiber classes (such as flax, jute, kenaf, wingceltis bark, mulberry bark, cotton stalk bark), seed hair fiber classes (such as cotton, cotton linter, cotton waste) or waste paper fibers, etc.

[0030] Refer to Figure 2, for the nested - structure magnetic cigarette tube structure of this embodiment, the metal foil 101 is constructed into a ring - shaped foil receptor, which is exposed to the inner side of the heating tube 1 to provide an electromagnetic heating function, and the support tube 2 provides a mechanical support function. An aerosol - generating matrix is filled in the cavity of the heating tube 1, and a circumferential electromagnetic - heating cigarette cartridge can be formed. This nested cigarette tube integrates a receptor and can be used to fill aerosol - generating matrices in various forms. The assembly process is simple. The circumferential electromagnetic heating is carried out from the inside of the cigarette tube. Compared with the circumferential heating from the outside of the cigarette tube, it reduces the heat loss of the outer paper tube, reduces the paper smell, and improves the heating and smoking speed. Compared with the central heating from the inside of the aerosol - generating matrix, it increases the contact area and improves the carbonization uniformity.

[0031] In the first aspect, the symmetric distribution of the ring - shaped foil receptor of this embodiment and the mode of circumferential electromagnetic heating from the inside of the cigarette cartridge ensure the coupling stability between the receptor and the high - frequency alternating electromagnetic field. In this mode, there is a large heating area, that is, the metal foil 101 is in a ring - shaped coating form and is in direct and close contact with the side of the aerosol - generating matrix section. In this case, the heating effect can be improved, and it is applicable to filling aerosol - generating matrices in various forms, with high flexibility. This application mode does not require a receptor to be preset in the aerosol - generating matrix. Usually, the traditional process of assembling a receptor in the matrix is complex, the equipment is expensive, and it is difficult to ensure the consistency of the receptor in the axial central region, and the receptor is prone to shift. In addition, the inserted sheet - shaped receptor in the prior art is not symmetric in distribution in the magnetic flux in a strict sense. These two factors affect the coupling stability between the receptor and the high - frequency alternating electromagnetic field. However, the receptor in this design is fixed in spatial form and physical position and is symmetrically distributed in the magnetic flux, which can achieve a consistent and stable electromagnetic - field coupling effect, overcoming the defects of the asymmetric distribution and unstable coupling of the sheet - shaped receptor in the prior art.

[0032] In a second aspect, the heating tube 1 and the support tube 2 have separate functions, which reduces the process difficulty. Given the great difficulty in locally arranging a narrow strip (usually with a width less than 15 mm) of annular metal foil inside a cigarette tube with a small outer diameter (usually less than 8 mm), the present invention adopts a decomposed structure and process. The support tube 2 mainly performs the function of mechanical support and can be prepared as a relatively thick hard paper tube; the heating tube 1 mainly performs the function of electromagnetic heating and can be prepared as a relatively thin soft composite magnetic tube; separating the functions and the forming processes of the two can achieve the purpose of multi-function and simplified production process, and achieve higher manufacturability and lower cost. The metal foil 101 is arranged on the inner wall of the heating tube 1, and the forming steps of the support tube 2 and the heating tube 1 are separated, which reduces the process difficulty of arranging the metal foil sensor in a local area of the inner wall of the cigarette tube. The winding base paper of the heating tube 1 is a full composite of the metal foil 101 and the backing paper 102, made into a full composite metal paper, and then can be wound into a tube in various ways and then cut into unit tubes, improving the production efficiency. If the strong magnetic metal foil 101 is directly arranged inside the support tube 2, the winding base paper must adopt local composite, and the process difficulty of local composite is great. Moreover, when winding with the local composite metal paper, the difficulty of winding alignment (arranging the metal foil to the expected position) is very great, and its process is limited to parallel flat winding. Generally, the support tube 2 is relatively thick, and after bonding by parallel flat winding, there will be obvious steps at the overlapping joints. Here, two tubes with a nested structure are provided, further moving the heat-generating body of the sensor inward, and using the outer wall (backing paper 102) of the heating tube 1 to perform a certain degree of thermal insulation on the support tube 2 to reduce its heat influence (such as burnt smell and a large amount of heat loss) and maintain integrity.

[0033] In a third aspect, by first forming the cigarette tube and then filling the aerosol generating substrate, the universality of the cigarette tube is enhanced. The support tube 2 is prepared as a relatively thick hard paper tube, and the heating tube 1 is prepared as a relatively thin soft paper tube. After being inserted and fitted, it is a formed nested structure magnetic cigarette tube, which can be used subsequently to fill various forms of aerosol generating substrates, greatly improving the applicable range of this magnetic cigarette tube. Suitable forms of the aerosol generating substrate include various forms such as granular, powdery, flaky, stem filamentous, folded, honeycomb, sponge, hemp rope, textile cloth wrapped or non-woven fabric wrapped. As long as it is a fuming body material that is convenient to fill into the heating tube 1, it can be used to cooperate with this nested structure magnetic cigarette tube to prepare a cigarette cartridge that performs electromagnetic circumferential heating from the inside of the cigarette cartridge.

[0034] Continue to refer to Figure 2, which shows a schematic diagram of a four-section structure cartridge assembled by a nested magnetic cigarette tube. The granular aerosol generating substrate 5 is filled in the heating tube 1 and is tightly wrapped by the receptor strong magnetic metal foil 101. A breathable sponge plug 3 is provided at the upper end of the heating tube 1, and a cooling member 402 is configured at the lower end to ensure that both ends of the substrate have a blocking and breathable function. The bottom end of the support tube 2 is filled with a filter tip section 401, and the outer layer is wrapped with a relatively thin cigarette paper 6 wound and bonded in parallel to enhance the smooth and beautiful effect.

[0035] The strong magnetic metal foil 101 not only constitutes a ring-shaped foil receptor for heating the aerosol generating substrate 5, but also can serve as a leakage protection cover for the aerosol generating substrate 5 to prevent the liquid-phase components in the aerosol generating substrate 5 from eroding the heating tube 1 and the support tube 2 outward. In this structure, the main functions of the heating tube 1 include eddy current heating and anti-leakage functions, that is, providing a ring-shaped foil receptor, containing the aerosol generating substrate 5, and preventing the liquid-phase components in the aerosol generating substrate 5 from eroding the lining paper 102 in the heating tube 1 and the support tube 2 outward. The main function of the support tube 2 is mainly to integrate the internal units to form a complete cartridge to provide mechanical support and ensure its stability and reliability.

[0036] During the coupling process with the electromagnetic heating smoking device, the strong magnetic metal foil 101 acts as a receptor to circumferentially heat the aerosol generating substrate 5. This circumferential heating starts from the inside of the heating tube 1 and diffuses from the outside to the inner central region. Moreover, the lining paper 102 on the other side of it has a certain blocking and absorption effect on the heat transfer outward, reducing the thermal impact on the outermost support tube 2. This electromagnetic circumferential heating mode originating from the inside of the heating tube 1 has a faster heat conduction speed, less heat loss, and can reduce the paper paste smell caused by a large amount of heat penetrating through a thicker paper tube compared with the circumferential heating originating from the outside of the support tube 2.

[0037] In a preferred embodiment, in addition to ensuring that both ends of the substrate have a blocking and breathable function by providing the cooling member 402 in the heating tube 1 as described above, it is also a feasible solution to provide a high-permeability membrane, such as a high-permeability paper membrane, at one end close to the cigarette filter. The high-permeability membrane can transmit the smoke generated by the smoke-generating body and transfer it to the cigarette filter end through the internal cavity. The high-permeability membrane is adhered to the heating tube 1 by adhesive.

[0038] Embodiment 2

[0039] A manufacturing method for manufacturing the electromagnetic heating cartridge in Embodiment 1 includes steps such as base paper preparation, winding, shaping and cutting, assembly and filling.

[0040] Among them, in the preparation of the base paper, a strongly magnetic metal foil is laminated with a thin backing paper to form a metal paper. For the support tube, a three-layer medium grammage paper, such as ordinary paper with a grammage of 80 g (about 80 microns), is selected for winding. For the heating tube, first, a metal paper is prepared by laminating a strongly magnetic metal foil with a thin backing paper. For example, a soft magnetic alloy 1J94 metal foil with a thickness of 15 microns is laid flat, coated with adhesive, bonded, and pressed with a 25-gram Sydney paper (about 25 microns thick) to form a metal paper. Then, three layers of metal paper are selected for winding. The metal foil and the backing paper are laminated together by an adhesive using a hot pressing method. Its main steps include: alignment adjustment, adhesive coating, calendering, baking and curing, winding, and trimming. The key parameters of this process include: the selection of the thicknesses of the metal foil and the backing paper, the tension control of the metal foil and the backing paper, the temperature of the hot pressing roller, the pressure of the hot pressing roller, the web running speed, the baking temperature, and the time. By optimizing and designing these parameters, a metal paper with a relatively thin overall thickness, light weight, and high bonding strength can be finally prepared. In another embodiment, the thin backing paper is composed of a tobacco paper laminated with a cigarette paper, and the cigarette paper selected is a hemp pulp-based cigarette paper with a grammage of 25 g / m 2 gram.

[0041] In winding, the metal paper is wound to form a long strip of heating tube, and the ordinary paper is wound to form a long strip of support tube. The base paper is wound around a mandrel, and the winding tension, angle, and number of layers are controlled. Specific winding methods can adopt parallel winding, spiral winding, cross winding, or a hybrid winding method combining these methods. Parallel winding means that the base paper is continuously wound into a cylindrical shape along its length direction, and the edges of the base paper are arranged parallel to each other. This method can provide a relatively smooth tube wall. Spiral winding means that the base paper is wound around the mandrel in a spiral shape at a certain angle to form a spiral paper tube. This method can improve the strength and bending resistance of the paper tube. Cross winding means that the base paper is wound around the mandrel in a crosswise manner to form a grid-like paper tube. This method can improve the air permeability and compressive resistance of the paper tube. Hybrid winding is a winding method that combines parallel winding, spiral winding, and cross winding and other methods to meet different performance requirements.

[0042] In cutting, the long strips of heating tube and support tube are shaped, cooled to room temperature, and cut into the required lengths. The wound paper tube is heated, heated, or otherwise treated to be shaped and maintain its shape, and then cooled to room temperature, and the paper tube is cut into the required length units.

[0043] In assembly, the heating tube is inserted and arranged inside the support tube, and a plug is provided at the end of the heating tube. As described above, the size of the heating tube is smaller than that of the support tube, so the assembly is also relatively simple and convenient to form a nested structure.

[0044] In the filling step, an aerosol-forming substrate is filled into the heating tube. In this embodiment, a particulate aerosol-generating substrate is selected, filled in the heating tube, and tightly wrapped by a sensor metal foil.

[0045] This nested cigarette tube integrates a sensor, can be used to fill various forms of aerosol-generating substrates, has a simple assembly process, performs electromagnetic circumferential heating from the inside of the cigarette tube. Compared with circumferential heating from the outside of the cigarette tube, it reduces the heat loss of the outer paper tube, reduces the paper odor, improves the heating and smoking speed. Compared with central heating from the inside of the aerosol-generating substrate, it increases the contact area and improves the carbonization uniformity.

[0046] Embodiment III

[0047] To further illustrate the structural composition, a microscopic structure analysis was performed on the cross-section of the heating tube 1. The sample that had been wound into the heating tube 1 was embedded and sectioned, and its local microscopic structure was observed using a scanning electron microscope. The results are as Figure 3 shown. It can be clearly distinguished that the strongly magnetic metal foil 101 is located inside the composite magnetic tube, and the lining paper 102 is located outside, and the two are tightly combined. Through high-magnification measurement, the wall thickness of the composite magnetic tube is about 0.1 mm.

[0048] To verify the electromagnetic cigarette cartridge strength of this embodiment, the peel strength of the metal paper was evaluated. Two groups of samples (#1 and #2) were selected for test analysis. The sample used a lining paper 102 with a thickness of 0.08 mm, a strongly magnetic metal foil 101 with a thickness of 0.015 mm, and Asahi Kasei WS571-B adhesive for calendering and compounding. After compounding, it was kept at 20 °C and a relative humidity of 65% for 48 hours and air-dried naturally. To facilitate the peel test, an opening was reserved at the beginning of the calendering. The peel test speed was 30 mm / s. The peel strength results are shown in Table 1.

[0049] From the results, it can be seen that the peel strength of the strongly magnetic metal foil 101 is between 0.28 - 0.30 N / mm, indicating that there is a good bonding force between the adhesive, the strongly magnetic metal foil 101, and the lining paper 102. This strength is sufficient to withstand the stress during the subsequent paper tube winding and forming and aerosol-forming substrate filling processes, effectively preventing delamination and ensuring the stability of the composite magnetic tube structure.

[0050] Table 1: Peel strength test results of a kind of metal paper

[0051] Number Force value (unit: N) Width (unit: mm) Peel strength (unit: N / mm) 1 3.7 12.49 0.30 2 3.2 11.25 0.28

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0053] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic heating cigarette cartridge with improved performance, characterized in that: It includes a hollow support tube and a heating tube. The size of the heating tube is smaller than the support tube, and the heating tube is nested in the support tube. An aerosol-forming matrix is ​​arranged in the hollow cavity of the heating tube, and a magnetic metal foil is arranged on the wall of the heating tube, which is used to perform electromagnetic induction circumferential heating on the aerosol-forming matrix from the inside of the cigarette cartridge.

2. The electromagnetic heating cigarette cartridge according to claim 1, characterized in that: The heating tube is wound by metal paper formed by ferromagnetic metal foil and lining paper, and the ferromagnetic metal foil is at least partially arranged on the inner wall.

3. The electromagnetic heating cigarette cartridge according to claim 2, characterized in that: The backing paper is heat-modified paper or tobacco-modified paper, and one or more of nicotine, nicotine salt or tobacco components are mixed into the backing paper.

4. The electromagnetic heating cigarette cartridge according to claim 1, characterized in that: The length of the heating tube is smaller than the length of the supporting tube, and the outer diameter of the heating tube is smaller than the outer diameter of the supporting tube.

5. The electromagnetic heating cigarette cartridge according to claim 1, characterized in that: It also includes a plug and a cooling component which are respectively abutted against the two ends of the heating tube.

6. The electromagnetic heating cigarette cartridge according to claim 1, characterized in that: The metal foil is configured to have a symmetrical structure, S 有效加热面积 With S 加热管内壁面积 The ratio is greater than 30%.

7. The electromagnetic heating cigarette cartridge according to claim 1, characterized in that: The heating tube is provided with a high-transmittance film at one end close to the cigarette holder.

8. A method for manufacturing an electromagnetic heating cigarette cartridge, used for manufacturing the electromagnetic heating cigarette cartridge according to any one of claims 1 to 7, characterized in that: include: Preparation of base paper, combining strong magnetic metal foil with thin backing paper to form metallic paper; Winding: winding the metal paper to form a heating tube strip, and winding the ordinary paper to form a support tube strip; Shaping and cutting: After the heating tube strips and the support tube strips are shaped, they are cooled to room temperature and cut into required lengths; Assemble, embed the heating tube into the support tube, and place the plug at the end of the heating tube; Filling: Fill the aerosol-forming matrix into the heating tube.

9. The manufacturing method according to claim 8, characterized in that: The filling step also includes packaging, arranging a cooling element or a high-transmittance film at the other end corresponding to the plug, and assembling the cigarette cartridge nozzle.

10. The manufacturing method according to claim 8, characterized in that: The thin lining paper is formed by compounding tobacco paper and cigarette paper.

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