Heat insulating material for aerosol generating device and aerosol generating device including the same

Abstract

The insulation material for an aerosol generating device includes an insulation sheet and a waterproof film disposed on at least one surface of the insulation sheet.

Description

[Technical Field]

[0001] The present invention relates to a thermal insulating material for an aerosol generating device and an aerosol generating device including the same. [Background technology]

[0002] Recently, there has been an increasing demand for alternative methods to overcome the shortcomings of conventional cigarettes. For example, there has been an increasing demand for methods that generate aerosols by heating an aerosol-generating material, rather than by burning a cigarette. As a result, research into heated aerosol generators has been actively conducted.

[0003] Some heated aerosol generators are equipped with a heat insulating material as a measure to prevent the heat generated by the heater of the aerosol generator from transferring to the outside and to improve energy efficiency. Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional aerosol generators use insulating materials such as cerakwool and aerogel, but these insulating materials have a problem in that they gradually increase their thermal conductivity by absorbing sidestream smoke that has been converted into droplets inside the aerosol generator, eventually losing their insulating function.

[0005] The problems to be solved through the embodiments are not limited to the problems described above, and problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the embodiments belong from this specification and the accompanying drawings.

[0006] The problem that the present invention aims to solve is to provide an insulating material for an aerosol generator that has excellent insulating properties and can prevent the problem of a decrease in insulating performance by absorbing dropletized sidestream smoke inside the aerosol generator, and a method for manufacturing the same. [Means for solving the problem]

[0007] An insulating material for an aerosol generating device according to one embodiment includes a heat insulating sheet and a waterproof film disposed on at least one surface of the heat insulating sheet.

[0008] An aerosol generating device according to another embodiment includes a storage space into which an aerosol product is inserted, a heater for heating the aerosol product stored in the storage space, and an insulating material arranged outside the heater to prevent heat generated from the heater from transferring outside the storage space, the insulating material including an insulating sheet and an insulating film arranged on at least one side of the insulating sheet.

[0009] The means for solving the problem are not limited to those described above, but include any matter that can be inferred by a person of ordinary skill in the art throughout this specification. [Effects of the Invention]

[0010] The insulating material for an aerosol generator and the aerosol generator including the same according to the embodiment can have excellent insulating properties. In addition, the problem of sidestream smoke converted into droplets inside the aerosol generator being absorbed by the insulating material can be prevented in advance, and excellent insulating performance can be maintained continuously.

[0011] The effects of the embodiment are not limited to those described above, but may include any effects that can be inferred from the configurations described below. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view schematically illustrating an example of a heat insulating material for an aerosol generating device according to one embodiment. [Figure 2] FIG. 1 is a cross-sectional view schematically illustrating an example of an aerosol generating device including a heat insulating material for the aerosol generating device according to one embodiment. [Figure 3] 3 is a cross-sectional view showing an example in which an aerosol product is inserted into the aerosol generating device according to the embodiment shown in FIG. 2. FIG. [Figure 4] FIG. 10 is a cross-sectional view schematically illustrating an example of an aerosol generating device including a heat insulating material for the aerosol generating device according to another embodiment. [Figure 5A] 1 is a diagram showing an image of a heat insulating material for an aerosol generating device manufactured according to an embodiment. [Figure 5B] 1 is a diagram showing an image of a heat insulating material for an aerosol generating device manufactured according to an embodiment. [Figure 5C] 1 is an image of the outer surface of a heat insulating material for an aerosol generating device manufactured according to an embodiment, observed through a microscope. [Figure 6] 1 is a graph showing the results of measuring temperature changes over time to measure the insulating performance of an insulating material for an aerosol-generating device according to one embodiment. [Figure 7] 1 is a graph showing the results of measuring temperature changes over time to measure the insulating performance of an insulating material for an aerosol-generating device according to one embodiment. [Figure 8] 1 is a graph showing the results of measuring temperature changes over time to measure the insulating performance of an insulating material for an aerosol-generating device according to one embodiment. [Figure 9A] 10 is an image immediately after glycerin droplets are dropped onto the surface of a heat insulating material for an aerosol generating device according to one embodiment. [Figure 9B] 10 is an image immediately after glycerin droplets are dropped onto the surface of a heat insulating material for an aerosol generating device according to one embodiment. [Figure 10A] 1 is an image taken one hour after glycerin droplets are dropped onto the surface of a heat insulating material for an aerosol generating device according to one embodiment. [Figure 10B] 1 is an image taken one hour after glycerin droplets are dropped onto the surface of a heat insulating material for an aerosol generating device according to one embodiment. [Figure 11] 1 is a schematic diagram of an example of an aerosol product. [Figure 12] 1 is a schematic drawing of another example of an aerosol product. [Figure 13] 1 is a schematic diagram illustrating yet another example of an aerosol product. DETAILED DESCRIPTION OF THE INVENTION

[0013] An insulating material for an aerosol generating device according to one embodiment includes a heat insulating sheet and a waterproof film disposed on at least one surface of the heat insulating sheet.

[0014] The insulating sheet includes a porous structure made of insulating fibers.

[0015] The heat insulating sheet includes polyimide fibers.

[0016] The thickness of the heat insulating sheet is also 0.05 mm to 1 mm.

[0017] The insulation sheet may include a first waterproof film disposed on one side thereof and a second waterproof film disposed on the other side thereof, and the first waterproof film and the second waterproof film may be adhered to each other so that the insulation sheet is not exposed to the outside.

[0018] The waterproof film contains one or more materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF).

[0019] An aerosol generating device according to another embodiment includes a storage space for storing an aerosol product, a heater for heating the aerosol product stored in the storage space, and an insulating material arranged outside the heater to prevent heat generated from the heater from transferring outside the storage space, the insulating material including an insulating sheet and an insulating film arranged on at least one side of the insulating sheet.

[0020] The insulation may contact longitudinal ends of the heater.

[0021] The insulating material may be disposed between the heater and an outer housing of the aerosol generating device, and the heater and the insulating material may be disposed spaced apart from each other.

[0022] The insulating sheet includes a porous structure made of insulating fibers.

[0023] The heat insulating sheet includes polyimide fibers.

[0024] The thickness of the heat insulating sheet is also 0.05 mm to 1 mm.

[0025] The insulation sheet may include a first waterproof film disposed on one side thereof and a second waterproof film disposed on the other side thereof, and the first waterproof film and the second waterproof film may be adhered to each other so that the insulation sheet is not exposed to the outside.

[0026] The waterproof film may include one or more materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF).

[0027] The terms used in the examples are currently commonly used terms, and are selected as much as possible while taking into consideration the functions in the present disclosure. However, this may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. In addition, in certain cases, the applicant may arbitrarily select terms, and in such cases, the meanings thereof will be described in detail in the description of the invention. Therefore, the terms used in the present disclosure must be defined based on the meanings of the terms and the overall content of the present disclosure, rather than simply by the names of the terms.

[0028] Throughout the specification, when a part is described as "comprising" a certain element, it does not mean that it excludes other elements, but that it may further include other elements, unless otherwise specified to the contrary.

[0029] Furthermore, terms such as "unit" and "module" used in the specification refer to a unit that processes at least one function or operation, and may be implemented by hardware or software, or by a combination of hardware and software.

[0030] As used herein, when an expression such as "at least one of" precedes an array of elements, it modifies the entire array of elements and not each individual element of the array.

[0031] For example, the phrase "at least one of a, b, and c" should be interpreted as including a, b, c, or a and b, a and c, b and c, or a, b, and c.

[0032] Additionally, terms including ordinal numbers such as "first" or "second" used herein may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another.

[0033] Throughout the specification, an "aerosol generating device" is also a device that generates an aerosol using an aerosol-generating substance to generate an aerosol that can be inhaled directly into the user's lungs through the user's mouth.

[0034] Throughout the specification, the term "aerosol product" refers to an article used for smoking. For example, an aerosol product may be a typical combustion cigarette that is lit and burned, or a heated cigarette that is heated by an aerosol generating device. As another example, an aerosol product may be an article that is used by heating a liquid contained in a cartridge. Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. Hereinafter, embodiments will be described in detail with reference to the drawings.

[0035] FIG. 1 is a cross-sectional view schematically illustrating an example of a thermal insulating material 10 for an aerosol generating device according to one embodiment.

[0036] Referring to FIG. 1, the insulating material 10 for an aerosol generator includes an insulating sheet 11 and a waterproof film 12. However, the present invention is not limited thereto. For example, the insulating material 10 for an aerosol generator may further include other elements in addition to the elements illustrated in FIG. 1. FIG. 1 illustrates a cross-sectional view of the insulating material 10 for an aerosol generator in the form of a flat sheet. However, this is merely an example, and the insulating material 10 for an aerosol generator may have other appropriate shapes depending on the location where the insulating material 10 is to be placed, the purpose of the insulating material 10, the type and shape of the heater of the aerosol generator, etc. For example, the insulating material 10 for an aerosol generator may have shapes selected from, for example, a cylindrical shape, a tube shape, a sheet shape, etc., but is not limited thereto.

[0037] The heat insulating sheet 11 may contain heat insulating fibers. The heat insulating fibers may include one or more materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF). However, the heat insulating fibers are not limited thereto, and any material that has heat resistance at a certain temperature or above (e.g., 300°C or above) and low thermal conductivity may be used without limitation.

[0038] The heat insulating sheet 11 serves to block heat transfer. For example, the heat insulating sheet 11 may be included in the heat insulating material 10 for the aerosol generating device to block the transfer of heat generated from the heater of the aerosol generating device.

[0039] The thermal insulation sheet 11 may have a porous structure made of thermal insulating fibers. For example, the porous structure may be realized by weaving a fabric using the thermal insulating fibers. The fabric woven using the thermal insulating fibers may have excellent thermal insulation properties due to the micropores formed between the thermal insulating fibers.

[0040] As an example, the heat insulating sheet 11 may include polyimide paper, which is a fabric woven from polyimide (PI) fibers. However, this is merely an example, and the type of heat insulating fiber included in the heat insulating sheet 11 and the porous structure formed therein may be appropriately changed.

[0041] The heat insulating sheet 11 can have a thickness of about 0.05 mm to about 1 mm. Heat insulating material 10 including a fabric woven using heat insulating fibers can be manufactured thin, thereby expanding the range of applications of the manufactured heat insulating material 10 based on its flexibility. If the heat insulating sheet 11 has a thickness of less than about 0.05 mm, the heat insulating property and durability of the heat insulating sheet 11 will be insufficient. Furthermore, if the heat insulating sheet 11 has a thickness exceeding about 1 mm, the flexibility of the heat insulating sheet 11 will decrease and the volume of the heat insulating material 10 will increase excessively. This may limit the range of applications for aerosol generating devices.

[0042] For example, the insulating material 10 including a fabric woven using insulating fibers may have a tubular shape surrounding a storage space for storing an aerosol product of an aerosol generating device, as described below. As another example, the insulating material 10 including a fabric woven using insulating fibers may also be used as a gasket disposed between a heater and a component supporting the heater of an aerosol generating device. When used as a gasket, the insulating sheet 11 must have a relatively thin thickness to ensure sufficient flexibility of the insulating material 10. Therefore, the thickness of the insulating sheet 11 may be about 0.06 mm to about 0.5 mm, or about 0.08 mm to about 0.4 mm.

[0043] A waterproof film 12 may be formed on at least one surface of the heat insulating sheet 11. The waterproof film 12 can block moisture (e.g., condensed sidestream smoke) and air from penetrating from the outside, thereby preserving the heat insulating performance of the heat insulating sheet 11. While FIG. 1 illustrates the waterproof film 12 being disposed on both sides of the heat insulating sheet 11, the present invention is not limited thereto, and the waterproof film 12 may be disposed on only one surface of the heat insulating sheet 11, with no waterproof film 12 disposed on the other surface opposite the one surface.

[0044] Here, the waterproof film 12 can be placed on the heat insulating sheet 11 using various methods for closely adhering the heat insulating sheet 11 and the waterproof film 12. For example, the waterproof film 12 can be attached to the heat insulating sheet 11 using an adhesive material. As another example, a vacuum can be formed between the heat insulating sheet 11 and the waterproof film 12. As another example, the surface of the heat insulating sheet 11 can be coated with the waterproof film 12.

[0045] The waterproof film 12 may be arranged so that the heat insulating sheet 11 is not exposed to the outside. For example, a first waterproof film 12-1 may be arranged on one side of the heat insulating sheet 11, and a second waterproof film 12-1 may be arranged on the other side opposite the first side of the single sheet, and the first waterproof film 12-1 and the second waterproof film 12-2 may be adhered to each other so that the heat insulating sheet 11 is not exposed to the outside. As illustrated in FIG. 1, edges 13-1 and 13-2 of the first waterproof film 12-1 and the second waterproof film 12-2, respectively, arranged on both sides of the heat insulating sheet 11, may be sealed. This prevents the heat insulating sheet 11 from being exposed to the outside, thereby preventing external moisture or air from penetrating.

[0046] The waterproof film 12 may be made of a material that has adhesive strength and heat resistance. For example, the waterproof film 12 may include a polymer material that is heat resistant at temperatures of 200° C. or higher and has adhesive properties. For example, the waterproof film 12 may include one or more polymer materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF).

[0047] For example, the waterproof film 12 may include a polyimide film. The polyimide film blocks moisture absorption and has excellent heat resistance. Therefore, the polyimide film is also suitable as the heat insulating material 10 attached to the heater of the aerosol generating device.

[0048] The waterproof film 12 may be formed by coating the heat insulating sheet 11 with a paint made of a material that has adhesive strength and heat resistance. In this case, the heat insulating material can be manufactured by coating the heat insulating sheet 11 with paint and then drying the paint without a process of heat sealing or pressing the film. This simplifies the manufacturing process and reduces manufacturing costs. As an example, the waterproof film 12 may be formed by coating the heat insulating sheet 11 with polyimide varnish. However, the embodiment is not limited thereto, and the type of paint may be appropriately selected taking into consideration the type of heat insulating sheet 11, the use of the heat insulating material 10, etc.

[0049] Here, varnish means a type of paint used for film formation.

[0050] Furthermore, when the waterproof film 12 is formed by coating with paint, the thickness of the film is thinner than when the waterproof film 12 is attached to the heat insulating sheet 11, and the adhesive strength of the waterproof film 12 to the heat insulating sheet 11 can be improved. When the waterproof film 12 is formed to a thin thickness, the volume of the heat insulating material 10 can be reduced and its flexibility can be improved. Therefore, space utilization inside the aerosol generating device can be improved, and the uses of the heat insulating material 10 can be diversified.

[0051] For example, the insulating material 10 can be used as a gasket disposed between components located inside an aerosol generator. The insulating material 10 can also be disposed to surround the longitudinal end of a tubular heater having a hollow interior, preventing the end of the heater from being exposed to the outside. Mainstream smoke generated by the aerosol generator is inhaled through the user's end. Meanwhile, sidestream smoke is generated at the upstream end of the aerosol generator. The sidestream smoke is not inhaled by the user but may be condensed into droplets inside the aerosol generator. The condensed sidestream smoke can be absorbed into the insulating material installed inside the aerosol generator, reducing the insulating performance of the insulating material. The insulating material 10 for an aerosol generator according to the embodiment has a waterproof film 12 disposed on the surface of the insulating sheet 11, preventing the absorption of condensed sidestream smoke, thereby maintaining the performance of the insulating material 10. In addition, the heat of the heater is effectively concentrated on the aerosol product through the heat insulating material 10 of the aerosol generating device, thereby improving the taste of the generated aerosol and reducing the preheating time and power consumption of the heater.

[0052] FIG. 2 is a cross-sectional view schematically illustrating an example of an aerosol-generating device 100 including a thermal insulating material 10 for an aerosol-generating device according to one embodiment.

[0053] 2, the aerosol generating device 100 includes a battery 110, a control unit 120, a heater 130, and a thermal insulator 10 for the aerosol generating device. However, the aerosol generating device 100 is not limited thereto, and other elements may be included in addition to the elements shown in FIG. 2. The locations of the battery 110, the control unit 120, and the heater 130 may be changed depending on the design of the aerosol generating device 100.

[0054] The battery 110 supplies power used for the operation of the aerosol generation device 100. For example, the battery 110 can supply power so that an alternating current is applied to the heater 130 and can supply power necessary for the operation of the control unit 120. The battery 110 can also supply power necessary for the operation of a display, a sensor, a motor, etc. provided in the aerosol generation device 100.

[0055] The control unit 120 controls the overall operation of the aerosol generation device 100. Specifically, the control unit 120 controls the operation of not only the battery 110 and the heater 130 but also other components included in the aerosol generation device 100. The control unit 120 also checks the state of each component of the aerosol generation device 100 and determines whether the aerosol generation device 100 is in an operable state.

[0056] The control unit 120 includes at least one processor. The processor may be implemented as an array of multiple logic gates, or as a combination of a general-purpose microprocessor and a memory storing a program executed by the microprocessor. Those skilled in the art will understand that the processor may also be implemented as other types of hardware.

[0057] The heater 130 may be heated by power supplied from the battery 110. For example, if the aerosol product 200 is inserted into the aerosol generating device 100, the heater 130 may be located outside the aerosol product 200. Thus, the heated heater 130 may increase the temperature of the aerosol-generating material within the aerosol product 200.

[0058] The heater 130 may also be an electrical resistance heater. For example, the heater 130 may include a conductive track, and the heater 130 may be heated by passing a current through the conductive track. However, the heater 130 is not limited to the above example, and may be any heater that can be heated to a desired temperature. Here, the desired temperature may be preset in the aerosol generating device 100, or may be set to a desired temperature by a user.

[0059] For example, the heater 130 may include a tubular heating element, a plate-shaped heating element, a needle-shaped heating element, or a rod-shaped heating element, and may heat the interior or exterior of the aerosol production article 200 depending on the shape of the heating element.

[0060] In addition, a plurality of heaters 130 may be arranged in the aerosol generating device 100. In this case, the plurality of heaters 130 may be arranged to be inserted inside the aerosol product 200, or may be arranged outside the aerosol product 200. In addition, some of the plurality of heaters 130 may be arranged to be inserted inside the aerosol product 200, and the rest may be arranged outside the aerosol product 200. In addition, the shape of the heater 130 is not limited to the shape shown in FIG. 2, and various shapes may be manufactured.

[0061] Meanwhile, as another example, the heater 130 may be an induction heater. Specifically, the heater 130 may include a conductive coil for heating the aerosol product 200 by induction heating, and the aerosol product 200 may include a susceptor heated by the induction heater. The induction heating method may refer to a method of applying an alternating magnetic field, the direction of which is periodically changed, to a magnetic material that generates heat due to an external magnetic field, thereby generating heat.

[0062] When an alternating magnetic field is applied to a magnetic body, energy loss occurs in the magnetic body due to eddy current loss and hysteresis loss, and the lost energy can be released from the magnetic body as thermal energy. The greater the amplitude or frequency of the alternating magnetic field applied to the magnetic body, the more thermal energy can be released from the magnetic body. The aerosol generating device 100 can apply an alternating magnetic field to the magnetic body to release thermal energy from the magnetic body and transfer the thermal energy released from the magnetic body to the aerosol product 200.

[0063] The magnetic material that generates heat due to an external magnetic field can also be called a susceptor. The susceptor can be provided in the aerosol generating device 100 in the form of a piece, a thin piece, a strip, or the like. For example, at least a portion of the heater 130 disposed inside the aerosol generating device 100 can be made of a susceptor material.

[0064] At least a portion of the susceptor material is formed of a ferromagnetic substance. For example, the susceptor material may include metal or carbon. The susceptor material may include at least one of ferrite, ferromagnetic alloy, stainless steel, and aluminum (Al). The susceptor material may also include at least one of graphite, molybdenum, silicon carbide, niobium, nickel alloy, metal film, ceramic such as zirconia, transition metal such as nickel (Ni) or cobalt (Co), and metalloid such as boron (B) or phosphorus (P).

[0065] The aerosol generation device 100 can accommodate an aerosol product 200. An accommodation space 102 for accommodating the aerosol product 200 can be formed in the aerosol generation device 100. A heater 130 can be disposed in the space for accommodating the aerosol product 200. For example, the heater 130 can have a cylindrical accommodation space 102 therein for accommodating the aerosol product 200. Therefore, when the aerosol product 200 is accommodated in the aerosol generation device 100, the aerosol product 200 can be accommodated in the accommodation space 102 of the heater 130.

[0066] The heater 130 may surround at least a portion of the outer surface of the aerosol product article 200 contained in the aerosol generating device 100. For example, the heater 130 may surround the tobacco medium contained in the aerosol product article 200. This may allow for more efficient transfer of heat from the heater 130 to the tobacco medium.

[0067] The heater 130 can heat the aerosol product 200 housed in the aerosol generating device 100. As described above, the heater 130 can heat the aerosol product 200 by induction heating.

[0068] The heater 130 includes a susceptor material that generates heat when subjected to an external magnetic field, and the aerosol generating device 100 can apply an alternating magnetic field to the heater 130 .

[0069] Although not shown in FIG. 2 , a coil may be included in the aerosol generating device 100. The coil may apply an alternating magnetic field to the heater 130. When power is supplied to the coil from the aerosol generating device 100, a magnetic field may be formed inside the coil. When an alternating current is applied to the coil, the direction of the magnetic field formed inside the coil may be continuously changed. When the heater 130 is positioned inside the coil and exposed to the alternating magnetic field whose direction changes periodically, the heater 130 generates heat, and the aerosol product 200 accommodated in the accommodation space 102 of the heater 130 may be heated.

[0070] The coil may be wound along the outer surface of the heater 130. Alternatively, the coil may be wound along the inner surface of the outer housing 101 of the aerosol generating device 100. The heater 130 may be located in an internal space formed by the wound coil. When power is supplied to the coil, an alternating magnetic field generated by the coil may be applied to the heater 130.

[0071] The coil extends in the longitudinal direction of the aerosol generating device 100. The coil may extend to any suitable length along the longitudinal direction. For example, the coil may extend to a length corresponding to the length of the heater 130 or may extend to a length longer than the length of the heater 130.

[0072] The coil may be positioned in a location suitable for applying an alternating magnetic field to the heater 130. For example, the coil may be positioned in a location corresponding to the heater 130. Depending on the size and location of the coil, the efficiency with which the alternating magnetic field of the coil is applied to the heater 130 may be improved.

[0073] When the amplitude or frequency of the alternating magnetic field generated by the coil is changed, the degree to which the heater 130 heats the aerosol product 200 can also be changed. Because the amplitude or frequency of the magnetic field generated by the coil can be changed by the power applied to the coil, the aerosol generation device 100 can control the heating of the aerosol product 200 by adjusting the power applied to the coil. For example, the aerosol generation device 100 can control the amplitude and frequency of the alternating current applied to the coil.

[0074] As an example, the coil may be embodied as a solenoid. The coil may also be a solenoid wound along the inner surface of the outer housing 101 of the aerosol generating device 100, and the heater 130 and the aerosol generating product 200 may be located in the internal space of the solenoid. The material of the conductor constituting the solenoid may be copper (Cu). However, the material is not limited thereto, and the conductor constituting the solenoid may also be any one of silver (Ag), gold (Au), aluminum (Al), tungsten (W), zinc (Zn), and nickel (Ni), or an alloy containing at least one of them.

[0075] Although not shown in Fig. 2, the aerosol generating device 100 further includes a vaporizer. The vaporizer heats the liquid composition to generate an aerosol, and the generated aerosol can be delivered to a user through the aerosol product 200. That is, the aerosol generated by the vaporizer travels along an airflow passage of the aerosol generating device 100, and the airflow passage can be configured so that the aerosol generated by the vaporizer can be delivered to a user through the aerosol product 200.

[0076] For example, the vaporizer may include, but is not limited to, a liquid storage unit, a liquid transfer means, and a heating element. For example, the liquid storage unit, the liquid transfer means, and the heating element may be included in the aerosol generation device 100 as separate modules.

[0077] The liquid storage unit can store a liquid composition. For example, the liquid composition can be a liquid containing a tobacco-containing substance including a volatile tobacco flavor component, or a liquid containing a non-tobacco substance. The liquid storage unit can be designed to be detachable from / attachable to the vaporizer, or can be designed as an integral part of the vaporizer.

[0078] For example, the liquid composition may contain water, solvent, ethanol, plant extract, fragrance, flavoring, or vitamin mixture. Flavoring may include, but is not limited to, menthol, peppermint, spearmint oil, various fruit fragrance components, etc. Flavoring may include components that provide various flavors or tastes to the user. The vitamin mixture may include, but is not limited to, a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E. The liquid composition may also include an aerosol-forming agent, such as glycerin and propylene glycol.

[0079] The liquid transfer means transfers the liquid composition in the liquid storage section to the heating element. For example, the liquid transfer means may be a wick such as, but not limited to, cotton fiber, ceramic fiber, glass fiber, or porous ceramic. The heating element is an element for heating the liquid composition transferred by the liquid transfer means. For example, the heating element may be, but is not limited to, a metal hot wire, a metal hot plate, or a ceramic heater. The heating element may also be composed of a conductive filament such as a nichrome wire and may be arranged in a structure wound around the liquid transfer means. The heating element is heated by supplying an electric current and transfers heat to the liquid composition in contact with the heating element, thereby heating the liquid composition. As a result, an aerosol may be generated.

[0080] For example, the vaporizer may also be called a cartomizer or an atomizer, but is not limited thereto. Fig. 3 is a cross-sectional view showing an example in which an aerosol product 200 is inserted into the aerosol generating device 100 according to the embodiment shown in Fig. 2.

[0081] 3, the heat insulating material 10 is disposed outside the heater 130 and can prevent heat generated by the heater 130 from transferring to the outside of the accommodation space 102. The heat insulating material 10 is disposed between the outer housing 101 and the heater 130 and can prevent heat loss from the aerosol generating device 100. Although FIG. 3 illustrates an example in which the tubular heat insulating material 10 is disposed outside the tubular heater 130, the present invention is not limited thereto. The heat insulating material 10 can be applied in any form as long as it can prevent heat generated by the heater 130 from transferring to the outside of the accommodation space 102.

[0082] The heat insulating material 10 concentrates the heat generated by the heater 130 on the aerosol product 200, thereby improving the heating efficiency of the heater 130 and also improving the smoking experience of the aerosol product 200.

[0083] Furthermore, the heat insulating material 10 can shorten the preheating time of the aerosol generating device 100, thereby reducing power consumption.

[0084] The heat insulating material 10 may be disposed between the heater 130 and the outer housing 101 of the aerosol generation device 100, and the heater 130 and the heat insulating material 10 may be disposed spaced apart from each other. An air layer is formed in the space between the heater 130 and the heat insulating material 10, thereby improving the ability to block the transfer of heat generated by the heater 130. Generally, when the heater 130 is cylindrical and surrounds the outer surface of the aerosol product 200, a large area of ​​the heater 130 is disposed adjacent to the outer housing 101 of the aerosol generation device 100, which may easily transfer the heat generated by the heater 130 to the outside of the aerosol generation device 100, causing the user to feel hot or adversely affecting other components. According to the embodiment, the heater 130 and the heat insulating material 10 are spaced apart from each other, which may prevent the heat generated by the heater 130 from being directly transferred to the heat insulating material 10, thereby further improving the heat insulating performance.

[0085] FIG. 4 is a cross-sectional view schematically illustrating an example of an aerosol-generating device 100 including a thermal insulating material 10 for an aerosol-generating device according to another embodiment.

[0086] 4, the insulating material 10 contacts the longitudinal end of the heater 130. As shown in FIG. 4, the insulating material 10 has an annular shape and contacts the longitudinal end of the tubular heater 130 to prevent the end of the heater 130 from being exposed to the outside.

[0087] The ends of the heater 130 may be supported by other components inside the aerosol generating device 100 so that the heater 130 maintains its position within the aerosol generating device 100. The insulating material 10 is disposed between the ends of the heater 130 and the components supporting the ends of the heater 130, and serves to block heat from transferring from the heater 130 to the components supporting the ends of the heater 130.

[0088] Here, the insulation material 10 in contact with the end of the heater 130 may include a porous structure made of insulating fibers. The insulation material 10 including the insulating fibers can effectively maintain contact with the end of the heater 130, which has a small area, due to its flexible properties. In addition, the waterproof film 12 of the insulation material 10 may be formed by coating the insulation sheet 11 with a paint (i.e., a coating material) made of a material with adhesive strength and heat resistance. When the waterproof film 12 is formed by coating the insulation sheet 11 with paint, the waterproof film 12 is formed to a thin thickness, which may further improve the flexibility of the insulation material 10.

[0089] Example 1. Manufacture of heat insulating material for aerosol generator (cross-section waterproof film, thickness 0.170 mm, inner diameter 9.0 mm)

[0090] A polyimide varnish (waterproof film) was applied to one side of a 0.150 mm thick polyimide paper and then dried at 130°C for 10 minutes to produce a sheet-shaped insulating material for an aerosol generator with a thickness of 0.170 mm. The produced sheet-shaped insulating material for an aerosol generator was wound once into a tube with a diameter of 9.0 mm and fixed with adhesive. Figures 5A and 5B are diagrams showing images of the insulating material for an aerosol generator produced in Example 1. Figure 5A is an image of the outer surface of the insulating material for an aerosol generator produced in Example 1 viewed perpendicular to the longitudinal direction, and Figure 5B is an image of the insulating material for an aerosol generator viewed parallel to the longitudinal direction. Figure 5C is an image of the outer surface of the insulating material for an aerosol generator produced in Example 1, observed through a microscope.

[0091] 5A to 5C, it can be seen that the insulating material for the aerosol generating device has a porous structure in which polyimide fibers are layered, and has excellent flexibility.

[0092] Example 2. Production of heat insulating material for aerosol generator (double-sided waterproof film, thickness 0.200 mm, inner diameter 9.0 mm)

[0093] A tubular insulating material for an aerosol generator was manufactured in the same manner as in Example 1, except that a sheet-shaped insulating material for an aerosol generator having a thickness of 0.200 mm was manufactured by applying polyimide varnish to both sides of a polyimide paper having a thickness of 0.150 mm.

[0094] Example 3. Production of heat insulating material for aerosol generator (double-sided waterproof film, thickness 0.400 mm, inner diameter 9.0 mm)

[0095] A tubular insulating material for an aerosol generator (tube wall thickness: 0.400 mm) was manufactured in the same manner as in Example 1, except that a sheet-like insulating material for an aerosol generator having a thickness of 0.200 mm was manufactured by applying polyimide varnish to both sides of a polyimide paper having a thickness of 0.150 mm and then wound twice into a tube having a diameter of 9.0 mm.

[0096] Example 4. Production of heat insulating material for aerosol generator (double-sided waterproof film, thickness 0.200 mm, inner diameter 9.2 mm)

[0097] A tubular insulating material for an aerosol generator was manufactured in the same manner as in Example 1, except that a sheet-shaped insulating material for an aerosol generator having a thickness of 0.200 mm was manufactured in the shape of a tube with a diameter of 9.2 mm by applying polyimide varnish to both sides of a polyimide paper having a thickness of 0.150 mm.

[0098] Example 5. Production of heat insulating material for aerosol generator (double-sided waterproof film, thickness 0.400 mm, inner diameter 9.2 mm)

[0099] A tubular insulating material for an aerosol generator was manufactured in the same manner as in Example 1, except that a sheet-like insulating material for an aerosol generator having a thickness of 0.200 mm was manufactured by applying polyimide varnish to both sides of a polyimide paper having a thickness of 0.150 mm and then wound twice into a tube having a diameter of 9.2 mm.

[0100] Experimental Example 1: Measurement of the thermal insulation effect of insulating materials for aerosol generators

[0101] An electrically resistive tubular film heater (0.700±0.035Ω) was installed on the inner surface of the tubular insulating material for an aerosol-generating device manufactured in Example 1 and Example 2, and a SUS pipe was installed on the inner surface of the film heater to manufacture a module for measuring the insulating effect. A voltage of 2.5 V was applied to the tubular film heater to heat it so that the average saturation temperature reached 290°C, and the temperature change of the SUS pipe was measured over time.

[0102] FIG. 6 is a graph showing the results of measuring temperature changes over time in Experimental Example 1. The graph in FIG. 6 is divided into sections based on the type of insulating material for the aerosol generator used in the module for measuring the insulation effect. The comparative example refers to a module in which no insulating material for the aerosol generator is used. The measurement for Example 1 was performed twice and annotated as Example 1-1 and Example 1-2. The measurement for Example 2 was performed three times and annotated as Example 2-1, Example 2-2, and Example 2-3.

[0103] Referring to Figure 6, the saturation temperature of the comparative example was measured to be approximately 298°C, while the average saturation temperature of Example 1 was measured to be approximately 325°C and the average saturation temperature of Example 2 was measured to be approximately 330°C. Therefore, it was confirmed that the average saturation temperature of the example including the insulation material was higher than that of the comparative example not including the insulation material, and that it had excellent insulation effect. It was also confirmed that the insulation effect of Example 1, which used an insulation material coated with a waterproof film on only one side, and Example 2, which used an insulation material coated with a waterproof film on both sides, was at a similar level.

[0104] Experimental example 2: Comparison of insulation performance depending on insulation thickness

[0105] The experiment was carried out in the same manner as in Experimental Example 1, except that the heat insulating materials for the tubular aerosol generating device manufactured in Examples 2 and 3 were used.

[0106] Fig. 7 is a graph showing the results of measuring temperature changes over time in Experimental Example 2. As in Experimental Example 1, the graph in Fig. 7 is plotted according to the type of insulating material for the aerosol-generating device used in the module for measuring the insulating effect. The measurement for Example 2 was carried out three times and plotted as Example 2-1, Example 2-2, and Example 2-3. The measurement for Example 3 was also carried out three times and plotted as Example 3-1, Example 3-2, and Example 3-3.

[0107] 7, the average saturation temperature of Example 2 was measured to be about 330° C., while the average saturation temperature of Example 3 was measured to be about 343° C. Therefore, it was confirmed that the thermal insulation performance improved as the thickness of the thermal insulation material increased.

[0108] Experimental example 3: Comparison of insulation performance depending on the inner diameter of the insulation material

[0109] The experiment was carried out in the same manner as in Experimental Example 1, except that the heat insulating materials for the tubular aerosol generating device manufactured according to Examples 2 to 5 were used.

[0110] Fig. 8 is a graph showing the results of measuring temperature changes over time in Experimental Example 3. As in Experimental Example 1, the graph in Fig. 8 is plotted according to the type of insulating material for the aerosol generation device used in the module for measuring the insulating effect.

[0111] 8, the average saturation temperature of Example 2 was measured to be about 330° C., the average saturation temperature of Example 3 was measured to be about 343° C., the average saturation temperature of Example 4 was measured to be about 320° C., and the average saturation temperature of Example 5 was measured to be about 336° C. Therefore, it was confirmed that the insulating effect decreases as the inner diameter of the insulating material increases.

[0112] Experimental example 4: Waterproof performance test of insulation material

[0113] Glycerin droplets were dropped onto the surface of the insulating material for the aerosol generator manufactured in Example 1 to confirm the waterproofing performance of the insulating material.

[0114] 9A and 9B are images taken immediately after glycerin droplets were dropped onto the surface of the insulating material in Experimental Example 4, and FIGS. 10A and 10B are images taken one hour after the glycerin droplets were dropped onto the surface of the insulating material.

[0115] 9A to 10B, it was confirmed that the glycerin droplets dropped on the surface of the thermal insulation material were not absorbed by the thermal insulation material after one hour and maintained their shape, thereby confirming that the thermal insulation material has excellent waterproofing properties.

[0116] Hereinafter, with reference to FIGS. 11 to 13, examples of aerosol production products used in the aerosol generating device according to one embodiment will be described with reference to the drawings.

[0117] FIG. 11 is a diagrammatic representation of an example of an aerosol product 200.

[0118] Referring to Figure 11, an aerosol product 200 includes a tobacco rod 210 and a filter rod 220. While Figure 11 illustrates the filter rod 220 as a single segment, this is not limiting. That is, the filter rod 220 may be composed of multiple segments. For example, the filter rod 220 may include a first segment that cools the aerosol and a second segment that filters specific components contained in the aerosol. If necessary, the filter rod 220 may further include at least one segment that performs another function.

[0119] The aerosol product 200 may be packaged using at least one wrapper 240. The wrapper 240 may have at least one hole formed therein through which external air can enter or internal gas can escape. As an example, the aerosol product 200 may be packaged using a single wrapper 240. As another example, the aerosol product 200 may be packaged by overlapping two or more wrappers 240. For example, the tobacco rod 210 may be packaged using a first wrapper 241, and the filter rod 220 may be packaged using wrappers 242, 243, and 244. The entire aerosol product 200 may then be repackaged using a single wrapper 245. If the filter rod 220 is made up of multiple segments, each segment may be packaged using a wrapper 242, 243, or 244.

[0120] The tobacco rod 210 includes an aerosol-generating material. For example, the aerosol-generating material may include, but is not limited to, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. The tobacco rod 210 may also include other additives, such as flavoring agents, humectants, and / or organic acids. A flavoring liquid, such as menthol or a humectant, may also be added to the tobacco rod 210 by being sprayed onto the tobacco rod 210.

[0121] The tobacco rod 210 may be manufactured in a variety of ways. For example, the tobacco rod 210 may be manufactured in the form of a sheet or a strand. The tobacco rod 210 may also be manufactured from shredded tobacco, which is a tobacco sheet cut into small pieces. The tobacco rod 210 may also be surrounded by a thermally conductive material. For example, the thermally conductive material may be a metal foil such as aluminum foil, but is not limited to this. For example, the thermally conductive material surrounding the tobacco rod 210 may evenly distribute heat transferred to the tobacco rod 210, improving the thermal conductivity of the tobacco rod, thereby improving the tobacco taste.

[0122] In addition, the thermally conductive material surrounding the tobacco rod 210 can function as a susceptor heated by an induction heater. In this case, although not shown, the tobacco rod 210 may further include an additional susceptor in addition to the thermally conductive material surrounding the exterior.

[0123] The filter rod 220 is also a cellulose acetate filter. However, the shape of the filter rod 220 is not limited. For example, the filter rod 220 may be a cylindrical rod or a tubular rod with a hollow interior. The filter rod 220 may also be a recessed rod. If the filter rod 220 is composed of multiple segments, at least one of the multiple segments may be manufactured in a different shape.

[0124] The filter rod 220 may also be designed to release a flavor. For example, a flavoring liquid may be sprayed onto the filter rod 220, or a separate fiber coated with the flavoring liquid may be inserted into the filter rod 220.

[0125] The filter rod 220 may also include at least one capsule 230. The capsule 230 may generate a flavor or an aerosol. For example, the capsule 230 may be a structure that encases a liquid containing a flavoring agent with a coating. The capsule 230 may have, but is not limited to, a spherical or cylindrical shape.

[0126] If the filter rod 220 includes a segment for cooling the aerosol, the cooling segment may be made of a polymeric material or a biodegradable polymeric material. For example, the cooling segment may be made of, but is not limited to, pure polylactic acid. Alternatively, the cooling segment may be made of a cellulose acetate filter with multiple holes formed therein. However, the cooling segment is not limited to the above examples and may be any material as long as it can perform the function of cooling the aerosol.

[0127] FIG. 12 is a schematic diagram of another example of an aerosol production article 200.

[0128] 12, the aerosol production product 200 may further include a front end plug 250. The front end plug 250 is located on one side of the tobacco rod 210 opposite the filter rod 220. The front end plug 250 prevents the tobacco rod 210 from detaching to the outside and prevents liquefied aerosol from the tobacco rod 210 from flowing into the aerosol generating device during smoking.

[0129] Filter rod 220 may include a first segment 221 and a second segment 222. Here, first segment 221 may correspond to the first segment of filter rod 220 in FIG. 11, and second segment 222 may correspond to the second segment of filter rod 220 in FIG.

[0130] The diameter and overall length of the aerosol product article 200 can correspond to the diameter and overall length of the aerosol product article 200 of Figure 11. For example, but not limited to, the length of the front end plug 250 can be about 7 mm, the length of the tobacco rod 210 can be about 15 mm, the length of the first segment 221 can be about 12 mm, and the length of the second segment 222 can be about 14 mm.

[0131] The aerosol product 200 may be wrapped by at least one wrapper 240. The wrapper 240 may have at least one hole formed therein through which external air can flow in or internal gas can flow out. For example, the front end plug 250 may be wrapped by a first wrapper 241, the tobacco rod 210 may be wrapped by a second wrapper 242, the first segment 221 may be wrapped by a third wrapper 243, and the second segment 222 may be wrapped by a fourth wrapper 244. The entire aerosol product 200 may then be repackaged by a fifth wrapper 245.

[0132] In addition, at least one perforation 246 may be formed in the fifth wrapper 245. For example, but not limited to, the perforation 246 may be formed in the area surrounding the tobacco rod 210. The perforation 246 may serve to transfer heat generated by the heater to the interior of the tobacco rod 210.

[0133] The second segment 222 may also include at least one capsule 230. The capsule 230 may generate a flavor or an aerosol. For example, the capsule 230 may have a structure in which a liquid containing a flavoring agent is enclosed in a coating. The capsule 230 may have, but is not limited to, a spherical or cylindrical shape.

[0134] FIG. 13 is a schematic diagram of yet another example of an aerosol production article 200.

[0135] 13, aerosol product 200 may include first portion 260, second portion 270, third portion 280, and fourth portion 290. Specifically, first portion 260, second portion 270, third portion 280, and fourth portion 290 may include an aerosol-generating element, a tobacco element, a cooling element, and a filter element, respectively. As an example, first portion 260 may include an aerosol-generating material, second portion 270 may include a tobacco material and a humectant, third portion 280 may cool the airflow passing through first portion 260 and second portion 270, and fourth portion 290 may include a filter material.

[0136] 13, the first portion 260, the second portion 270, the third portion 280, and the fourth portion 290 may be sequentially aligned based on the longitudinal direction of the aerosol product 200. Here, the longitudinal direction of the aerosol product 200 is also the direction in which the length of the aerosol product 200 extends. For example, the longitudinal direction of the aerosol product 200 is also the direction from the first portion 260 to the fourth portion 290. As a result, aerosol generated in at least one of the first portion 260 and the second portion 270 passes through the first portion 260, the second portion 270, the third portion 280, and the fourth portion 290 sequentially to form an airflow, thereby allowing a smoker to inhale the aerosol from the fourth portion 290.

[0137] The first portion 260 may include an aerosol-generating component, and may also include other additives such as flavoring agents, humectants, and / or organic acids, including flavoring liquids such as menthol or moisturizers. The aerosol-generating component may include, for example, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.

[0138] The first portion 260 may include a crimped sheet, and the aerosol-generating element may be impregnated in the crimped sheet and included in the first portion 260. Other additives and flavoring liquids, such as flavoring agents, humectants, and / or organic acids, may also be absorbed in the crimped sheet and included in the first portion 260.

[0139] The crimped sheet may also be a sheet made of a polymeric material. For example, the polymeric material may include at least one of paper, cellulose acetate, lyocell, and polylactic acid. For example, the crimped sheet may be a paper sheet that does not emit an unpleasant odor even when heated to a high temperature. However, the crimped sheet is not limited thereto.

[0140] The first portion 260 extends from the end of the aerosol product 200 to a point about 7 to 20 mm, and the second portion 270 extends from the end of the first portion 260 to a point about 7 to 20 mm. However, these numerical ranges are not necessarily limited, and the extension lengths of the first portion 260 and the second portion 270 can be appropriately adjusted within a range that can be easily changed by a skilled artisan.

[0141] The second portion 270 may include tobacco elements. The tobacco elements may be tobacco materials in a particular form. For example, the tobacco elements may be in the form of tobacco cut tobacco, tobacco particles, tobacco sheets, tobacco beads, tobacco granules, tobacco powder, or tobacco extract. The tobacco materials may also include, for example, one or more of tobacco leaves, tobacco veins, expanded tobacco, cut tobacco, flat tobacco, and reconstituted tobacco.

[0142] The third portion 280 may cool the airflow passing through the first portion 260 and the second portion 270. The third portion 280 may be made of a polymeric material or a biodegradable polymeric material and have a cooling function. For example, the third portion 280 may be made of, but is not limited to, polylactic acid (PLA) fiber. Alternatively, the third portion 280 may be made of a cellulose acetate filter having a plurality of holes formed therein. However, the third portion 280 is not limited to the above examples, and any material that performs the function of cooling the aerosol may be used without limitation.

[0143] For example, the third portion 280 may be a tube filter or a paper tube filter that includes a hollow.

[0144] The fourth portion 290 may include a filter material. For example, the fourth portion 290 may be a cellulose acetate filter. However, the shape of the fourth portion 290 is not limited. For example, the fourth portion 290 may be a cylindrical rod, a tubular rod with a hollow interior, or a recessed rod. If the fourth portion 290 is composed of multiple segments, at least one of the multiple segments may be formed into a different shape.

[0145] The fourth portion 290 may be configured to emit a flavor. For example, a flavoring liquid may be sprayed onto the fourth portion 290, and additional fibers coated with the flavoring liquid may be inserted into the fourth portion 290.

[0146] The aerosol product 200 may include a wrapper 240 that encases at least a portion of the first portion 260 to the fourth portion 290. The aerosol product 200 may also include a wrapper 240 that encases all of the first portion 260 to the fourth portion 290. The wrapper 240 is located at the outermost periphery of the aerosol product 200, and the wrapper 240 may be a single wrapper or a combination of multiple wrappers.

[0147] By way of example, the first portion 260 of the aerosol product 200 may include a crimped, wrinkled sheet containing an aerosol-generating material, the second portion 270 may include flat cut tobacco as the tobacco material and glycerin as the humectant, the third portion 280 may include a paper tube, and the fourth portion 290 may include cellulose acetate fibers, but is not necessarily limited thereto.

[0148] Those skilled in the art will understand that the present invention may be embodied in various modified forms without departing from the essential characteristics of the above description. Therefore, the disclosed method should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the claims, not the foregoing description, and all variations within the scope of the claims should be construed as being within the scope of the present invention.

Claims

1. 1. A thermal insulation material for an aerosol generating device, A heat insulating sheet, a waterproof film disposed on at least one surface of the heat insulating sheet; The heat insulating sheet includes a porous structure formed by weaving a fabric, and heat insulating fibers are used in the weaving; The insulating material for an aerosol generating device, wherein the insulating fiber includes a polyimide fiber.

2. 2. The heat insulating material for an aerosol generating device according to claim 1, wherein the heat insulating sheet has a thickness of 0.05 mm to 1 mm.

3. The insulating sheet includes a first waterproof film disposed on one side thereof and a second waterproof film disposed on the other side thereof, The heat insulating material for an aerosol generating device according to claim 1 , wherein the first waterproof film and the second waterproof film are adhered to each other so that the heat insulating sheet is not exposed to the outside.

4. 2. The insulating material for an aerosol generating device according to claim 1, wherein the waterproof film comprises one or more materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF).

5. In the aerosol generating device, a storage space for storing an aerosol-producing article; a heater for heating the aerosol product contained in the containing space; a heat insulating material disposed outside the heater to prevent heat generated by the heater from transferring to the outside of the accommodation space, The heat insulating material includes a heat insulating sheet and a waterproof film disposed on at least one surface of the heat insulating sheet, The heat insulating sheet includes a porous structure formed by weaving a fabric, and heat insulating fibers are used in the weaving; The aerosol generating device, wherein the insulating fibers include polyimide fibers.

6. The aerosol generating device according to claim 5 , wherein the insulating material contacts longitudinal ends of the heater.

7. the thermal insulator is disposed between the heater and an outer housing of the aerosol generating device; The aerosol generating device according to claim 5 , wherein the heater and the insulating material are arranged spaced apart from each other.

8. The aerosol according to claim 5, wherein the thickness of the heat insulating sheet is 0.05 mm to 1 mm. generator.

9. The insulating sheet includes a first waterproof film disposed on one side thereof and a second waterproof film disposed on the other side thereof, The aerosol generating device according to claim 5 , wherein the first waterproof film and the second waterproof film are adhered to each other so that the heat insulating sheet is not exposed to the outside.

10. 10. The aerosol generating device of claim 9, wherein the first waterproof film and the second waterproof film contain one or more materials selected from the group consisting of polyimide (PI), polyetheretherketone (PEEK), polyamideimide (PAI), polyphenylsulfide (PPS), polyphenylsulfone (PPSU), polysulfone (PSU), polyethersulfone (PES), polyetherimide (PEI), polytetrafluoroethylene (PTFE), and polyvinylidene fluoride (PVDF).

Images