Aerosol generating article with a bulk-reduced wrapper

Abstract

We provide aerosol-generating articles. [Solution] The aerosol generating article 10 comprises an aerosol forming section 17b. The aerosol forming section comprises a rod 12 of the aerosol generating substrate. The aerosol forming section comprises an intermediate section 17a located downstream of the rod of the aerosol generating substrate. The intermediate section comprises one or more hollow tubular elements 14, 15. The aerosol generating article comprises a mouthpiece element 18. The mouthpiece element is located downstream of the aerosol forming section. The aerosol generating article comprises at least two wrappers 16, 19. At least two wrappers comprise a first wrapper 16 that surrounds only the aerosol forming section. The first wrapper 16 has a volume of 1.42 cubic centimeters or less per gram. At least two wrappers comprise a second wrapper 19 that surrounds at least a portion of the mouthpiece element.

Description

Technical Field

[0001] The present disclosure relates to a rod of an aerosol generating substrate and an aerosol generating article including at least two wrappers.

Background Art

[0002] Aerosol generating articles in which an aerosol generating substrate such as a tobacco-containing substrate is heated rather than burned are known in the art. In a heated aerosol generating article, an aerosol is generated by heating an aerosol generating substrate.

[0003] It is known to provide a heating element for heating an aerosol generating substrate of an aerosol generating article. The heating element may be provided in the article in the form of a susceptor element that can be heated when penetrated by a changing magnetic field. Alternatively, or additionally, the heating element may be provided in an aerosol generating device for generating an inhalable vapor. Such a device may heat an aerosol generating substrate contained in an aerosol generating article without burning the aerosol generating substrate. The aerosol generating article may have a rod shape configured for insertion of a portion of the aerosol generating article into the device cavity of the aerosol generating device. The aerosol generating device may also include a heating element configured to be inserted into the rod of the aerosol generating substrate. The heating element may be located within the device cavity. When the aerosol generating substrate of the aerosol generating article is received within the device cavity, the heating element may penetrate the aerosol generating substrate and be inserted into the aerosol generating substrate to heat the aerosol generating substrate from the inside.

[0004] A heatable aerosol generating article may include one or more wrappers surrounding at least a portion of the aerosol generating article. The provision of one or more wrappers may secure the components of the aerosol generating article together.

[0005] During use, the outer peripheral portion of the aerosol generating substrate, further from the heating element, may receive less heat from the heating element than the portion closer to it. This creates a temperature gradient that can facilitate the movement of condensates and slurries to cooler parts of the aerosol generating substrate, such as the outer periphery. As a result, the wrapper may become soiled, damp, or wet during use. When the wrapper becomes damp, it reduces its tensile strength and can cause the aerosol generating article to break inside the device cavity of the aerosol generating apparatus, particularly at the joints between components of the aerosol generating article, when the article is removed after use.

[0006] It is also known that aerosol-generating articles may be provided with a wrapper printed with a lip-release lacquer or a coating such as markings or a distinctive color on the surface of the wrapper to provide an aesthetically pleasing and distinctive appearance to the aerosol-generating article. However, it may be desirable to provide the coating, markings, or distinctive color only to a portion of the length of the wrapper, such as the mouth end of the aerosol-generating article. However, this may increase the complexity of the manufacturing process if the coating, markings, or distinctive color is applied only to a portion of the wrapper's surface.

[0007] To increase the mechanical robustness of aerosol-generating articles, and particularly to reduce the risk of breakage when removing the articles from the apparatus cavity of the aerosol generator after use, it is desirable to provide wrappers with increased wet and dry tensile strength. Furthermore, it is desirable that the wrappers be configured so that the coating, markings, or distinctive colors can be more easily applied to different parts of the aerosol-generating articles without requiring complex manufacturing techniques or modifications to existing manufacturing processes. [Overview of the Initiative]

[0008] The present invention provides an aerosol generating article. The aerosol generating article may comprise an aerosol forming section. The aerosol forming section may comprise a rod of an aerosol generating substrate. The aerosol forming section may comprise an intermediate section located downstream of the rod of the aerosol generating substrate. The intermediate section may comprise one or more hollow tubular elements. The aerosol generating article may comprise a mouthpiece element. The mouthpiece element may be located downstream of the aerosol forming section. The aerosol generating article may comprise at least two wrappers. At least two wrappers may comprise a first wrapper that surrounds only the aerosol forming section. The first wrapper may have a volume of 1.42 cubic centimeters or less per gram. At least two wrappers may comprise a second wrapper that surrounds at least a portion of the mouthpiece element.

[0009] The present invention provides an aerosol generating article. The aerosol generating article comprises an aerosol forming section. The aerosol forming section comprises a rod of an aerosol generating substrate. The aerosol forming section comprises an intermediate section located downstream of the rod of the aerosol generating substrate. The intermediate section comprises one or more hollow tubular elements. The aerosol generating article comprises a mouthpiece element. The mouthpiece element is located downstream of the aerosol forming section. The aerosol generating article comprises at least two wrappers. At least two wrappers comprise a first wrapper that surrounds only the aerosol forming section. The first wrapper has a volume of 1.42 cubic centimeters or less per gram. At least two wrappers comprise a second wrapper that surrounds at least a portion of the mouthpiece element.

[0010] Advantageously, providing an aerosol-generating article having at least two wrappers makes it possible to provide different properties for each of the at least two wrappers. For example, one of the at least two wrappers may be provided with one or more of a printed coating, markings, or characteristic colors on its surface, while the other of the at least two wrappers may be provided without a coating, markings, or characteristic colors. Alternatively, for example, one of the at least two wrappers may be provided with one or more of a printed coating, markings, or characteristic colors on its surface, while the other of the at least two wrappers may be provided with one or more different choices of a coating, markings, or characteristic colors. Advantageously, the ability to provide different properties for each of the at least two wrappers may improve the versatility of the article that can be constructed compared to an article with a single wrapper. Advantageously, the ability to easily provide different properties for each of the at least two wrappers may improve the versatility of the article that can be constructed without increasing the complexity of the article's manufacture and without requiring modifications to existing manufacturing processes. This may also reduce manufacturing costs. For example, using existing manufacturing techniques, different properties can be provided for each of at least two wrappers, and then the at least two wrappers can be combined in different configurations relative to each other to achieve a desired property distribution.

[0011] Advantageously, providing a second wrapper that surrounds at least a portion of the mouthpiece element allows printed elements, such as a coating, markings, or one or more of a characteristic color, to be printed on the surface of the second wrapper that surrounds at least a portion of the mouthpiece element. Advantageously, providing a first wrapper that surrounds only the aerosol-forming section, i.e., not the mouthpiece element, allows for either providing no printed elements on the first wrapper at all, or providing no printed elements on the first wrapper that are different from those on the second wrapper. Advantageously, for example, this can reduce costs and simplify the manufacturing process because the desired printed elements can be easily applied to the surface of the second wrapper surrounding the mouthpiece without having to apply the printed elements to the first wrapper that surrounds only the aerosol-forming section. Advantageously, this makes it possible to provide a simpler and more cost-effective manufacturing process for the wrapper compared to, for example, identifying a selected printing area surrounding the mouthpiece element on a single wrapper that surrounds the entire aerosol-generating article and applying the desired printed elements only to this selected printing area.

[0012] Advantageously, providing a first wrapper having a volume of 1.42 cubic centimeters or less per gram provides the desired tensile strength of the first wrapper surrounding the aerosol-forming section under both dry conditions (dry tensile strength) and wet conditions (wet tensile strength).

[0013] For example, surprisingly, reducing the bulk of the wrapper from 1.44 (typical wrapper bulk value) to 1.13 was found to result in a 75 percent increase in the dry tensile strength of the wrapper (when measured according to ISO standard 1924-2:2008). Prior to the test, the wrappers were conditioned at 22 ± 2 degrees Celsius and 60 ± 5% relative humidity for at least 24 hours.

[0014] Furthermore, surprisingly, it was found that reducing the wrapper volume from 1.44 to 1.13 resulted in an approximately 20–40 percent increase in the vertical force required to break the aerosol-generating article (lying horizontally) at the joints between the components of the wrapper-wrapped aerosol-generating article, both before use and 1 minute after use.

[0015] For example, it was found that the vertical force required to break an aerosol-generating article lying horizontally at the joint between two hollow tubular elements wrapped with a wrapper having a volume of 1.13 before use was approximately 27 percent higher when a wrapper with a higher volume of 1.44 was provided compared to the case of a different aerosol-generating article. Furthermore, one minute after use of the aerosol-generating article, the vertical force required to break an aerosol-generating article lying horizontally at the joint between two tubular hollow tubular elements wrapped with a wrapper having a volume of 1.13 was approximately 20 percent higher when a wrapper with a higher volume of 1.44 was provided compared to the case of a different aerosol-generating article.

[0016] In a further embodiment, it was found that the vertical force required to break an aerosol-generating article lying horizontally at the joint between the aerosol-generating substrate rod and the element immediately upstream of the aerosol-generating substrate rod wrapped with a wrapper having a thickness of 1.13, before use of the aerosol-generating article, was about 27 percent higher in the case of a different aerosol-generating article, provided only in the case of a wrapper having a higher thickness of 1.44. Furthermore, it was found that one minute after use of the aerosol-generating article, the vertical force required to break an aerosol-generating article lying horizontally at the joint between the aerosol-generating substrate rod and the element immediately upstream of the aerosol-generating substrate rod wrapped with a wrapper having a thickness of 1.13, was about 40 percent higher in the case of a different aerosol-generating article, provided only in the case of a wrapper having a higher thickness of 1.44.

[0017] Advantageously, providing improved tensile strength to the first wrapper surrounding the aerosol-forming section reduces the risk of damage to the aerosol-generating article, particularly at the joints between components of the aerosol-forming section, when removing the article from the device after use.

[0018] As used herein, the term "aerosol-generating substrate" means a substrate that can condense to form an aerosol and release volatile compounds upon heating.

[0019] As used herein, the term “aerosol” means a dispersion of solid particles or droplets, or a combination of solid particles and droplets, in a gas. Aerosols may be visible or invisible. Aerosols may include not only vapors of substances that are normally liquid or solid at room temperature, but also solid particles or droplets, or a combination of solid particles and droplets.

[0020] As used herein, the term “aerosol-generating article” means an article comprising an aerosol-generating substrate having the ability to release volatile compounds that can form aerosols. Aerosol-generating articles may be disposable.

[0021] As used herein, the terms “upstream,” “downstream,” “proximal,” and “distal” are used to describe the relative positions of elements or parts of elements of the aerosol generating articles, aerosol generating devices, and aerosol generating systems as described herein. The aerosol generating articles described herein have a proximal end through which aerosols are discharged when in use. The proximal end may also be called the mouth end. When in use, the user inhales the aerosol generated by the aerosol generating article by inhaling it at the proximal or mouth end of the aerosol generating article. The aerosol generating article has a distal end opposite to the proximal or mouth end. The proximal or mouth end of the aerosol generating article may be called the downstream end. The distal end of the aerosol generating article may also be called the upstream end. Components or parts of components of an aerosol generating article may be described as being upstream or downstream of each other based on their relative positions between the proximal or downstream end and the distal or upstream end of the aerosol generating article.

[0022] As used herein, the term “long axis” is used to describe the direction between the downstream or proximal end and the opposite upstream or distal end of the aerosol generating article, aerosol generating device, and aerosol generating system according to the present invention.

[0023] As used herein, the term “length” is used to describe the maximum dimension of an element or part of an aerosol generating article, aerosol generating device, and aerosol generating system according to this disclosure, either in the direction of the major axis or along the major axis.

[0024] When used herein, the term "transverse direction" refers to a direction perpendicular to the longitudinal axis.

[0025] As used herein, the term "width" is used to describe the maximum transverse dimension of an aerosol generating article, an aerosol generating device, and an element of an aerosol generating system, or a portion of an element, according to the present disclosure. To avoid doubt, as used herein, the term "diameter" may be used to refer to the "width" of an element or a portion of an element having a circular transverse cross-section of an aerosol generating article, an aerosol generating device, and an aerosol generating system of the present disclosure.

[0026] Unless otherwise specified, reference to the "cross-section" of an aerosol generating article or a component of an aerosol generating article refers to a cross-section that is perpendicular to the longitudinal axis or axis.

[0027] As used herein, the term "hollow tubular element" refers to a generally elongated element that defines a lumen or air flow passage along its longitudinal axis. In particular, the term "tubular" is used hereinafter with respect to a tubular element that has a substantially cylindrical cross-section and defines at least one air flow conduit that establishes unbroken fluid communication between the upstream end of the tubular element and the downstream end of the tubular element. However, it will be understood that alternative shapes of the tubular element (e.g., alternative cross-sectional shapes) may be possible.

[0028] As used herein, the term "bulk" is defined as the inverse or reciprocal of density. In particular, for a wrapper, the bulk is calculated by dividing the thickness of the wrapper by the basis weight of the wrapper.

[0029] As used herein, "grammage" or "basis weight" are equivalent and are defined, for example, as equal to the mass per unit area of a wrapper. The grammage may be determined in accordance with ISO standard 536:2012.

[0030] As used herein, the term "thickness" is used, for example, to describe the minimum dimension of a wrapper. Thickness is measured perpendicular to the length and width of the wrapper. Thickness may be determined in accordance with ISO standard 534:2012.

[0031] Unless otherwise specified, measurements performed on the wrappers described herein are performed at 23 degrees Celsius and 50 percent relative humidity.

[0032] At least two wrappers of an aerosol-generating article include a first wrapper and a second wrapper. The first wrapper surrounds only the aerosol-forming section. In other words, the first wrapper does not surround the mouthpiece element.

[0033] The second wrapper may surround at least a portion of the mouthpiece element and at least a portion of the aerosol-forming section. The second wrapper may surround the mouthpiece element along the entire length of the mouthpiece element.

[0034] The first wrapper may have a bulk of at least 0.75 cubic centimeters per gram, at least 0.80 cubic centimeters per gram, at least 0.85 cubic centimeters per gram, at least 0.90 cubic centimeters per gram, at least 0.93 cubic centimeters per gram, at least 0.96 cubic centimeters per gram, or at least 1.1 cubic centimeters per gram.

[0035] The second wrapper may have a volume of 0.75 cubic centimeters or more per gram, 0.80 cubic centimeters or more per gram, 0.85 cubic centimeters or more per gram, 0.90 cubic centimeters or more per gram, 0.93 cubic centimeters or more per gram, 0.96 cubic centimeters or more per gram, 1 cubic centimeter or more per gram, 1.1 cubic centimeters or more per gram, 1.2 cubic centimeters or more per gram, 1.3 cubic centimeters or more per gram, or 1.4 cubic centimeters or more per gram.

[0036] The first wrapper may have a volume of 1.38 cubic centimeters or less per gram, 1.37 cubic centimeters or less per gram, 1.3 cubic centimeters or less per gram, or 1.23 cubic centimeters or less per gram.

[0037] The second wrapper may have a volume of 1.7 cubic centimeters or less per gram, 1.6 cubic centimeters or less per gram, 1.5 cubic centimeters or less per gram, 1.42 cubic centimeters or less per gram, 1.38 cubic centimeters or less per gram, 1.37 cubic centimeters or less per gram, 1.3 cubic centimeters or less per gram, or 1.23 cubic centimeters or less per gram.

[0038] The first wrapper has a density of 0.75 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.42 cubic centimeters per gram, and 0.96 cubic centimeters per gram to 1.4 2 cubic centimeters, 1.1 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1. 38 cubic centimeters, 0.96 cubic centimeters per gram to 1.38 cubic centimeters per gram, 1.1 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.37 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.37 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.37 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1 cubic centimeter per gram 0.37 cubic centimeters, 0.93 cubic centimeters per gram to 1.37 cubic centimeters per gram, 0.96 cubic centimeters per gram to 1.37 cubic centimeters per gram, 1.1 cubic centimeters per gram to 1.37 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.3 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.3 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.3 cubic centimeters, 0.90 cubic centimeters per gram to 1.3 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.3 cubic centimeters per gram, 0.96 cubic centimeters per gram to 1.3 cubic centimeters per gram, 1.1 cubic centimeters per gram to 1.30 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.23 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1 gram It may have a volume of 1.23 cubic centimeters per ram, 0.85 to 1.23 cubic centimeters per gram, 0.90 to 1.23 cubic centimeters per gram, 0.93 to 1.23 cubic centimeters per gram, 0.96 to 1.23 cubic centimeters per gram, or 1.10 to 1.23 cubic centimeters per gram.

[0039] The second wrapper has a density of 0.75 cubic centimeters per gram to 1.7 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.7 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.7 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.7 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.7 cubic centimeters per gram, and 0.96 cubic centimeters per gram to 1.7 cubic centimeters per gram. Cubic centimeters, 1 cubic centimeter per gram to 1.7 cubic centimeters per gram, 1.1 cubic centimeters per gram to 1.7 cubic centimeters per gram, 1.2 cubic centimeters per gram to 1.7 cubic centimeters per gram, 1.3 cubic centimeters per gram to 1.7 cubic centimeters per gram, 1.4 cubic centimeters per gram to 1.7 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.6 cubic centimeters per gram - 0.80 cubic centimeters per gram to 1.6 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.6 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.6 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.6 cubic centimeters per gram, 0.96 cubic centimeters per gram to 1.6 cubic centimeters per gram, 1 cubic centimeter per gram to 1.6 cubic centimeters per gram Lu, 1.1 cubic centimeters to 1.6 cubic centimeters per gram, 1.2 cubic centimeters to 1.6 cubic centimeters per gram, 1.3 cubic centimeters to 1.6 cubic centimeters per gram, 1.4 cubic centimeters to 1.6 cubic centimeters per gram, 0.75 cubic centimeters to 1.5 cubic centimeters per gram, 0.80 cubic centimeters to 1.5 cubic centimeters per gram, 0.85 cubic centimeters to 1.5 cubic centimeters per gram, 0.90 cubic centimeters to 1.5 cubic centimeters per gram, 0.93 cubic centimeters to 1.5 cubic centimeters per gram, 0.96 cubic centimeters to 1.5 cubic centimeters per gram, 1 cubic centimeter to 1.5 cubic centimeters per gram, 1.1 cubic centimeters to 1.5 cubic centimeters per gram, 1.2 cubic centimeters per gram 1 cubic centimeter to 1.5 cubic centimeters per gram, 1.3 cubic centimeters to 1.5 cubic centimeters per gram, 1.4 cubic centimeters to 1.5 cubic centimeters per gram, 0.75 cubic centimeters to 1.42 cubic centimeters per gram, 0.80 cubic centimeters to 1.42 cubic centimeters per gram, 0.85 cubic centimeters to 1.42 cubic centimeters per gram, 0.90 cubic centimeters per gram 1.42 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.42 cubic centimeters per gram, 0.96 cubic centimeters per gram to 1.42 cubic centimeters per gram, 1.1 cubic centimeters per gram to 1.42 cubic centimeters per gram, 1.2 cubic centimeters per gram to 1.42 cubic centimeters per gram, 1.3 cubic centimeters per gram to 1.42 cubic centimeters per gram, 1.4 cubic centimeters per gram 1.42 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.93 cubic centimeters per gram to 1.38 cubic centimeters per gram, 0.96 cubic centimeters to 1.38 cubic centimeters per gram, 1 cubic centimeter to 1.38 cubic centimeters per gram, 1.1 cubic centimeters to 1.38 cubic centimeters per gram, 1.2 cubic centimeters to 1.38 cubic centimeters per gram, 1.3 cubic centimeters to 1.38 cubic centimeters per gram, 0.75 cubic centimeters to 1.37 cubic centimeters per gram, 0.8 cubic centimeters per gram 0 cubic centimeters to 1.37 cubic centimeters per gram, 0.85 cubic centimeters to 1.37 cubic centimeters per gram, 0.90 cubic centimeters to 1.37 cubic centimeters per gram, 0.93 cubic centimeters to 1.37 cubic centimeters per gram, 0.96 cubic centimeters to 1.37 cubic centimeters per gram, 0.75 cubic centimeters to 1.3 cubic centimeters per gram, per gram 0.80 cubic centimeters to 1.3 cubic centimeters per gram, 0.85 cubic centimeters to 1.3 cubic centimeters per gram, 0.90 cubic centimeters to 1.3 cubic centimeters per gram, 0.93 cubic centimeters to 1.3 cubic centimeters per gram, 0.96 cubic centimeters to 1.3 cubic centimeters per gram, 1 cubic centimeter to 1.3 cubic centimeters per gram, 1.1 cubic centimeters per gram 1.3 cubic centimeters per gram, 1.2 cubic centimeters per gram to 1.3 cubic centimeters per gram, 0.75 cubic centimeters per gram to 1.23 cubic centimeters per gram, 0.80 cubic centimeters per gram to 1.23 cubic centimeters per gram, 0.85 cubic centimeters per gram to 1.23 cubic centimeters per gram, 0.90 cubic centimeters per gram to 1.23 cubic centimeters per gram, 0.It may have a volume of 93 cubic centimeters to 1.23 cubic centimeters per gram, 0.96 cubic centimeters to 1.23 cubic centimeters per gram, 1 cubic centimeter to 1.23 cubic centimeters per gram, 1.1 cubic centimeters to 1.23 cubic centimeters per gram, or 1.2 cubic centimeters to 1.23 cubic centimeters per gram.

[0040] The first wrapper may have a thickness of 36 micrometers or more, 40 micrometers or more, 41 micrometers or more, 45 micrometers or more, 46 micrometers or more, 50 micrometers or more, 60 micrometers or more, 70 micrometers or more, or 80 micrometers or more; The second wrapper may have a thickness of 36 micrometers or more, 40 micrometers or more, 41 micrometers or more, 45 micrometers or more, 46 micrometers or more, 50 micrometers or more, 58 micrometers or more, 60 micrometers or more, 70 micrometers or more, or 80 micrometers or more.

[0041] The first wrapper may have a thickness of 90 micrometers or less, 80 micrometers or less, 70 micrometers or less, 60 micrometers or less, 55 micrometers or less, 50 micrometers or less, 46 micrometers or less, 45 micrometers or less, 41 micrometers or less, or 40 micrometers or less.

[0042] The second wrapper may have a thickness of 90 micrometers or less, 80 micrometers or less, 72 micrometers or less, 70 micrometers or less, 65 micrometers or less, 60 micrometers or less, 55 micrometers or less, 50 micrometers or less, 46 micrometers or less, 45 micrometers or less, 41 micrometers or less, or 40 micrometers or less.

[0043] The first wrapper is 36 micrometers to 90 micrometers, 36 micrometers to 80 micrometers, 36 micrometers to 70 micrometers, 36 micrometers to 60 micrometers, 36 micrometers to 55 micrometers, 36 micrometers to 50 micrometers, 36 micrometers to 46 micrometers, 36 micrometers to 45 micrometers, 36 micrometers to 41 micrometers, 36 micrometers to 40 micrometers, 40 micrometers to 90 micrometers, 40 micrometers to 80 micrometers, 40 micrometers to 70 micrometers, 40 micrometers to 60 micrometers, 40 micrometers to 55 micrometers, 40 micrometers to 50 micrometers, 40 micrometers to 46 micrometers, 40 micrometers to 45 micrometers, 40 micrometers to 41 micrometers, 41 micrometers to 90 micrometers, 41 micrometers to 80 micrometers, 41 micrometers to 70 micrometers, 41 micrometers 60 micrometers, 41 micrometers to 55 micrometers, 41 micrometers to 50 micrometers, 41 micrometers to 46 micrometers, 41 micrometers to 45 micrometers, 45 micrometers to 90 micrometers, 45 micrometers to 80 micrometers, 45 micrometers to 70 micrometers, 45 micrometers to 60 micrometers, 45 micrometers to 55 micrometers, 45 micrometers to 50 micrometers, 45 micrometers to 46 micrometers, 46 micrometers to 90 micrometers, 46 micrometers to 80 micrometers, 46 micrometers to 70 micrometers, 46 micrometers to 60 micrometers, 46 micrometers to 55 micrometers, 46 micrometers to 50 micrometers, 50 micrometers to 90 micrometers, 50 micrometers to 80 micrometers, 50 micrometers to 70 micrometers, 50 micrometers to 60 micrometers, 50 micrometers to 55 micrometers,It may have a thickness of 60 to 90 micrometers, 60 to 80 micrometers, 60 to 70 micrometers, 70 to 90 micrometers, 70 to 80 micrometers, or 80 to 90 micrometers.

[0044] The second wrapper is 36 micrometers to 90 micrometers, 36 micrometers to 80 micrometers, 36 micrometers to 72 micrometers, 36 micrometers to 70 micrometers, 36 micrometers to 65 micrometers, 36 micrometers to 60 micrometers, 36 micrometers to 55 micrometers, 36 micrometers to 50 micrometers, 36 micrometers to 46 micrometers, 36 micrometers to 45 micrometers, 36 micrometers to 41 micrometers, 36 micrometers to 40 micrometers, 40 micrometers to 90 micrometers, 40 micrometers to 80 micrometers, 40 micrometers to 72 micrometers, 40 micrometers to 70 micrometers, 40 micrometers to 60 micrometers, 40 micrometers to 65 micrometers, 40 micrometers to 60 micrometers, 40 micrometers to 55 micrometers, 40 micrometers to 50 micrometers, 40 micrometers to 46 micrometers, 40 micrometers 45 micrometers to 45 micrometers, 40 micrometers to 41 micrometers, 41 micrometers to 90 micrometers, 41 micrometers to 80 micrometers, 41 micrometers to 72 micrometers, 41 micrometers to 70 micrometers, 41 micrometers to 65 micrometers, 41 micrometers to 60 micrometers, 41 micrometers to 55 micrometers, 41 micrometers to 50 micrometers, 41 micrometers to 46 micrometers, 41 micrometers to 45 micrometers, 45 micrometers to 90 micrometers, 45 micrometers to 80 micrometers, 45 micrometers to 72 micrometers, 45 micrometers to 70 micrometers, 45 micrometers to 65 micrometers, 45 micrometers to 60 micrometers, 45 micrometers to 55 micrometers, 45 micrometers to 50 micrometers, 45 micrometers to 46 micrometers, 46 micrometers to 90 micrometers, 46 micrometers to 80 micrometers,46 micrometers to 72 micrometers, 46 micrometers to 70 micrometers, 46 micrometers to 65 micrometers, 46 micrometers to 60 micrometers, 46 micrometers to 55 micrometers, 46 micrometers to 50 micrometers, 50 micrometers to 90 micrometers, 50 micrometers to 80 micrometers, 50 micrometers to 72 micrometers, 50 micrometers to 70 micrometers, 50 micrometers to 65 micrometers, 50 micrometers to 60 micrometers, 50 micrometers to 55 micrometers, 58 micrometers to 90 micrometers It may have a thickness of 58 micrometers to 80 micrometers, 58 micrometers to 72 micrometers, 58 micrometers to 70 micrometers, 58 micrometers to 65 micrometers, 58 micrometers to 60 micrometers, 60 micrometers to 90 micrometers, 60 micrometers to 80 micrometers, 60 micrometers to 72 micrometers, 60 micrometers to 70 micrometers, 70 micrometers to 90 micrometers, 70 micrometers to 80 micrometers, 70 micrometers to 72 micrometers, or 80 micrometers to 90 micrometers.

[0045] The ratio of the thickness of the first wrapper to the width of the rod of the aerosol generating substrate may be 1:225 to 1:70, 1:220 to 1:90, 1:200 to 1:110, or 1:180 to 1:130.

[0046] The ratio of the thickness of the second wrapper to the width of the rod of the aerosol generating substrate may be 1:225 to 1:70, 1:220 to 1:90, 1:200 to 1:110, or 1:180 to 1:130.

[0047] The first wrapper and the second wrapper may each have a uniform thickness. The thickness of the first wrapper and the second wrapper may differ at any point by 10 micrometers or less, 5 micrometers or less, 2 micrometers or less, 1 micrometer or less, or 0.5 micrometers or less.

[0048] The first wrapper may have a basis weight of 33.5 grams or more per square meter, 36.5 grams or more per square meter, 38.5 grams or more per square meter, 39.0 grams or more per square meter, 50 grams or more per square meter, or 60 grams or more per square meter.

[0049] The second wrapper may have a basis weight of 33.5 grams or more per square meter, 36.5 grams or more per square meter, 38.5 grams or more per square meter, 39.0 grams or more per square meter, 42 grams or more per square meter, 43 grams or more per square meter, 50 grams or more per square meter, or 60 grams or more per square meter.

[0050] The first wrapper may have a basis weight of 70 grams or less per square meter, 60 grams or less per square meter, 50 grams or less per square meter, 42 grams or less per square meter, 41.5 grams or less per square meter, 38.5 grams or less per square meter, or 36.5 grams or less per square meter.

[0051] The second wrapper may have a basis weight of 70 grams or less per square meter, 60 grams or less per square meter, 50 grams or less per square meter, 47 grams or less per square meter, 43 grams or less per square meter, 42 grams or less per square meter, 41.5 grams or less per square meter, 38.5 grams or less per square meter, or 36.5 grams or less per square meter.

[0052] The first wrapper contains 33.5 grams to 70 grams per square meter, 33.5 grams to 60 grams per square meter, 33.5 grams to 50 grams per square meter, 33.5 grams to 42 grams per square meter, 33.5 grams to 41.5 grams per square meter, 33.5 grams to 38.5 grams per square meter, and per square meter 33.5 grams per square meter to 36.5 grams per square meter, 36.5 grams per square meter to 70 grams per square meter, 36.5 grams per square meter to 60 grams per square meter, 36.5 grams per square meter to 50 grams per square meter, 36.5 grams per square meter to 42 grams per square meter, 36.5 grams per square meter to 41.5 grams per square meter, 36.5 grams per square meter to 1 square meter 38.5 grams per square meter, 38.5 grams to 70 grams per square meter, 38.5 grams to 60 grams per square meter, 38.5 grams to 50 grams per square meter, 38.5 grams to 42 grams per square meter, 38.5 grams to 41.5 grams per square meter, 39 grams to 70 grams per square meter, 3 It may have a basis weight of 9 grams to 60 grams per square meter, 39 grams to 50 grams per square meter, 39 grams to 42 grams per square meter, 39 grams to 41.5 grams per square meter, 50 grams to 70 grams per square meter, 50 grams to 60 grams per square meter, or 60 grams to 70 grams per square meter.

[0053] The first wrapper preferably has a basis weight of about 60 grams per square meter. More preferably, the first wrapper has a basis weight of about 36 grams per square meter.

[0054] The second wrapper has a weight of 33.5 grams to 70 grams per square meter, 33.5 grams to 60 grams per square meter, 33.5 grams to 50 grams per square meter, 33.5 grams to 47 grams per square meter, 33.5 grams to 43 grams per square meter, and 33.5 grams to 4 grams per square meter. 2 grams, 33.5 grams per square meter to 41.5 grams per square meter, 33.5 grams per square meter to 38.5 grams per square meter, 33.5 grams per square meter to 36.5 grams per square meter, 36.5 grams per square meter to 70 grams per square meter, 36.5 grams per square meter to 60 grams per square meter, 36.5 grams per square meter to 1 square meter 50 grams per square meter, 36.5 grams per square meter to 47 grams per square meter, 36.5 grams per square meter to 43 grams per square meter, 36.5 grams per square meter to 42 grams per square meter, 36.5 grams per square meter to 41.5 grams per square meter, 36.5 grams per square meter to 38.5 grams per square meter, 38.5 grams per square meter to... 70 grams per square meter, 38.5 grams per square meter to 60 grams per square meter, 38.5 grams per square meter to 50 grams per square meter, 38.5 grams per square meter to 47 grams per square meter, 38.5 grams per square meter to 43 grams per square meter, 38.5 grams per square meter to 42 grams per square meter, 38.5 grams per square meter to 41 grams per square meter.5 grams, 39 grams to 70 grams per square meter, 39 grams to 60 grams per square meter, 39 grams to 50 grams per square meter, 39 grams to 47 grams per square meter, 39 grams to 43 grams per square meter, 39 grams to 42 grams per square meter, 39 grams to 41.5 grams per square meter, 42 grams to 70 grams per square meter, 42 grams to 60 grams per square meter, 42 grams to 1 It may have a basis weight of 50 grams per square meter, 42 to 47 grams per square meter, 42 to 43 grams per square meter, 43 to 70 grams per square meter, 43 to 60 grams per square meter, 43 to 50 grams per square meter, 43 to 47 grams per square meter, 50 to 70 grams per square meter, 50 to 60 grams per square meter, or 60 to 70 grams per square meter.

[0055] The aerosol-generating article may have an article length, which is defined as the total length of the article from its downstream end to its upstream end along the longitudinal axis of the aerosol-generating article.

[0056] The length of the article may be 30 millimeters or more, 35 millimeters or more, 40 millimeters or more, or 45 millimeters or more.

[0057] The length of the article may be 80 mm or less, 70 mm or less, 60 mm or less, or 50 mm or less.

[0058] The length of the article may be 30-80 mm, 35-70 mm, 40-60 mm, 45-60 mm, 40-50 mm, 45-50 mm, or approximately 45 mm.

[0059] The cross-sectional shape of an article may be substantially constant along its length. The cross-sectional shape of an article may be substantially circular. An article may have a width perpendicular to its length, and the width may be substantially constant along its entire length.

[0060] The aerosol-generating article may have a width of 5 mm or more, 5.5 mm or more, 6 mm or more, 6.5 mm or more, or 7 mm or more.

[0061] The aerosol-generating article may have a width of 10 mm or less, 9 mm or less, 8 mm or less, or 7.5 mm or less.

[0062] The aerosol-generating article may have a width of 3 mm to 10 mm, 4 mm to 9 mm, 5 mm to 8 mm, 5 mm to 7.5 mm, 5.5 mm to 8 mm, 5.5 mm to 7.5 mm, 6 mm to 8 mm, 6 mm to 7.5 mm, 6.5 mm to 8 mm, 6.5 mm to 7.5 mm, 7 mm to 8 mm, or 7 mm to 7.5 mm.

[0063] The draw-out resistance (RTD) of the aerosol-generating article may be 10 to 70 millimeters of water column, 20 to 65 millimeters of water column, 30 to 60 millimeters of water column, 35 to 55 millimeters of water column, or 40 to 50 millimeters of water column.

[0064] Unless otherwise specified, the draw resistance (RTD) of a component or aerosol-generating article shall be measured in accordance with ISO standard 6565-2015. RTD refers to the pressure required to push air through the entire length of the component. The terms “pressure drop” or “draw resistance” of a component or article may also refer to “resistance to draw.” Such terms generally refer to measurements performed in accordance with ISO standard 6565-2015, normally carried out at a temperature of 22 degrees Celsius, a pressure of 101 kPa (approximately 760 Torr), and a relative humidity of 60%, with a volumetric flow rate of 17.5 milliliters per second at the output or downstream end of the measured component. The conditions for smoking and the specifications of the smoking machine are presented in ISO standard 3308 (ISO 3308:2012). The atmosphere for adjustment and testing is presented in ISO standard 3402 (ISO 3402:1999).

[0065] The draw-out resistance (RTD) can be expressed in units of pressure, such as millimeters of water column (mmWG).

[0066] Each of the first and second wrappers may form at least a portion of the outer surface of the article. In other words, the outer surface of the article may be at least partially defined by the first and second wrappers.

[0067] At least a portion of each of the first and second wrappers may be the outermost layer in the radial direction of the article. In other words, at least a portion of each of the first and second wrappers is not covered by any further layer.

[0068] The first wrapper may have a first wrapper length along the longitudinal axis of the aerosol-generating article. The first wrapper length may be measured from the upstream end of the first wrapper to the downstream end of the first wrapper.

[0069] The second wrapper may have a second wrapper length along the longitudinal axis of the aerosol-generating article. The second wrapper length may be measured from the upstream end of the second wrapper to the downstream end of the second wrapper. As described above, the aerosol-generating article may have an article length along the longitudinal axis of the aerosol-generating article. The aerosol-forming section may have an aerosol-forming section length, defined as the length of the article-forming section from its downstream end to its upstream end along the longitudinal axis of the aerosol-generating article.

[0070] The second wrapper length may be greater than or equal to the first wrapper length. Preferably, the first wrapper length is greater than or equal to the second wrapper length.

[0071] The length of the first wrapper is shorter than the length of the item.

[0072] The second wrapper length may be shorter than the article length.

[0073] The first wrapper length may be 30 percent or more of the article length, 40 percent or more of the article length, 50 percent or more of the article length, 60 percent or more of the article length, 70 percent or more of the article length, 80 percent or more of the article length, or 90 percent or more of the article length.

[0074] The second wrapper length may be 30 percent or more of the article length, 40 percent or more of the article length, 50 percent or more of the article length, 60 percent or more of the article length, 70 percent or more of the article length, 80 percent or more of the article length, or 90 percent or more of the article length.

[0075] The length of the first wrapper may be substantially equal to the length of the aerosol-forming section. That is, the first wrapper may extend along the entire length of the aerosol-forming section in a direction along the longitudinal axis of the aerosol-generating article.

[0076] The first wrapper length may be 95 percent or less of the article length, 90 percent or less of the article length, 80 percent or less of the article length, 70 percent or less of the article length, 60 percent or less of the article length, 50 percent or less of the article length, or 40 percent or less of the article length.

[0077] The second wrapper length may be 95 percent or less of the article length, 90 percent or less of the article length, 80 percent or less of the article length, 70 percent or less of the article length, 60 percent or less of the article length, 50 percent or less of the article length, or 40 percent or less of the article length.

[0078] The first wrapper length is 30-95 percent of the article length, 30-90 percent of the article length, 30-80 percent of the article length, 30-70 percent of the article length, 30-60 percent of the article length, 30-50 percent of the article length, 30-40 percent of the article length, 40-95 percent of the article length, 40-90 percent of the article length, 40-80 percent of the article length, 40-70 percent of the article length, 40-60 percent of the article length, 40-50 percent of the article length, and 50-95 percent of the article length. It may be 50 to 90 percent of the article length, 50 to 80 percent of the article length, 50 to 70 percent of the article length, 50 to 60 percent of the article length, 60 to 95 percent of the article length, 60 to 90 percent of the article length, 60 to 80 percent of the article length, 60 to 70 percent of the article length, 70 to 95 percent of the article length, 70 to 90 percent of the article length, 70 to 80 percent of the article length, 80 to 95 percent of the article length, or 90 to 95 percent of the article length.

[0079] The second wrapper length is 30-95 percent of the article length, 30-90 percent of the article length, 30-80 percent of the article length, 30-70 percent of the article length, 30-60 percent of the article length, 30-50 percent of the article length, 30-40 percent of the article length, 40-95 percent of the article length, 40-90 percent of the article length, 40-80 percent of the article length, 40-70 percent of the article length, 40-60 percent of the article length, 40-50 percent of the article length, and 50-95 percent of the article length. It may be 50 to 90 percent of the article length, 50 to 80 percent of the article length, 50 to 70 percent of the article length, 50 to 60 percent of the article length, 60 to 95 percent of the article length, 60 to 90 percent of the article length, 60 to 80 percent of the article length, 60 to 70 percent of the article length, 70 to 95 percent of the article length, 70 to 90 percent of the article length, 70 to 80 percent of the article length, 80 to 95 percent of the article length, or 90 to 95 percent of the article length.

[0080] The first wrapper length may be 10 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, or 40 mm or more.

[0081] The length of the first wrapper may be 50 mm or less, 40 mm or less, 30 mm or less, 25 mm or less, or 20 mm or less.

[0082] The first wrapper length may be 10mm-50mm, 10mm-40mm, 10mm-30mm, 10mm-25mm, 10mm-20mm, 20mm-50mm, 20mm-40mm, 20mm-30mm, 20mm-25mm, 25mm-50mm, 25mm-40mm, 25mm-30mm, 30mm-50mm, 30mm-40mm, or 40mm-50mm.

[0083] The second wrapper length may be 10 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, or 40 mm or more.

[0084] The second wrapper length may be 50 mm or less, 40 mm or less, 30 mm or less, 25 mm or less, or 20 mm or less.

[0085] The second wrapper length may be 10mm-50mm, 10mm-40mm, 10mm-30mm, 10mm-25mm, 10mm-20mm, 20mm-50mm, 20mm-40mm, 20mm-30mm, 20mm-25mm, 25mm-50mm, 25mm-40mm, 25mm-30mm, 30mm-50mm, 30mm-40mm, or 40mm-50mm.

[0086] One or both of the first and second wrappers may extend from the upstream end of the article. The second wrapper may extend from the downstream end of the article.

[0087] For example, the first wrapper may extend from the upstream end of the article, and the second wrapper may extend from the downstream end of the article.

[0088] The downstream end of the first wrapper may be downstream of the downstream end of the second wrapper. Preferably, the downstream end of the second wrapper is downstream of the downstream end of the first wrapper.

[0089] The upstream end of the second wrapper may be upstream of the upstream end of the first wrapper. Preferably, the upstream end of the first wrapper is upstream of the upstream end of the second wrapper.

[0090] Preferably, neither the first nor the second wrapper extends beyond the edge of the aerosol-generating article in a direction parallel to the longitudinal axis.

[0091] The first wrapper may be in direct physical contact with at least one of the rods and intermediate sections of the aerosol generating substrate. The second wrapper may be in direct physical contact with the mouthpiece element and may also be in direct physical contact with at least one of the rods and intermediate sections of the aerosol generating substrate. In other words, there may be no layer of material between the first wrapper and at least one of the rods and intermediate sections of the aerosol generating substrate. There may be no layer of material between the second wrapper and the mouthpiece element, and there may be no layer of material between the second wrapper and at least one of the rods and intermediate sections of the aerosol generating substrate.

[0092] Each of the first and second wrappers may be formed from a single continuous sheet of material. Each of the single continuous sheets may be wound about once around at least one of the aerosol-forming section and mouthpiece elements. Generally, each of the single continuous sheets may be wound slightly more than one but less than two times around at least one of the aerosol-forming section and mouthpiece elements to form an overlapping region of the opposing ends of each wrapper. The thickness of each wrapper is not measured in the overlapping region of the opposing ends of each wrapper. Each of the first and second wrappers may be formed from a single continuous sheet of material, and may consist of only a single layer, excluding any optional overlapping region of the opposing ends of each wrapper, if present.

[0093] One or both of the first and second wrappers may include a cellulosic material, preferably selected from one or more of paper, wood, textiles, natural fibers, and artificial fibers. One or both of the first and second wrappers may each have a paper layer. One or both of the first and second wrappers may each be made from a single sheet of paper.

[0094] The first wrapper may comprise a single layer of paper wound around the aerosol-forming section.

[0095] The second wrapper may comprise a single layer of paper wrapped around at least a portion of the mouthpiece element.

[0096] One or both of the first and second wrappers may be paper wrappers or non-paper wrappers. Preferred non-paper wrappers include, but are not limited to, sheets of homogenized tobacco material.

[0097] Preferably, both the first and second wrappers are formed from paper.

[0098] One or both of the first and second wrappers may be paper wrappers containing PVOH (polyvinyl alcohol) or silicon (or polysiloxane). PVOH may be applied to the paper wrapper as a surface coating, or the paper wrapper may include a surface treatment containing PVOH or silicon.

[0099] Advantageously, surface coating or treatment with PVOH (polyvinyl alcohol) or silicon (or polysiloxane) may improve the grease barrier properties of the wrapper.

[0100] One or both of the first and second wrappers may include a water-resistant barrier coating on at least a portion of their inner surface. The water-resistant barrier coating may include one or both of alkyl ketene dimer (AKD) and rosin. The water-resistant barrier coating component may be mixed with the wrapper fibers during the manufacturing process. The wrappers may be impregnated with the water-resistant barrier coating component.

[0101] Advantageously, providing a water-resistant barrier coating on at least a portion of the inner surface of one or both of the first and second wrappers may increase the wet tensile strength of the wrappers. While we do not wish to be bound by theory, providing a water-resistant barrier coating on at least a portion of the inner surface of one or both of the first and second wrappers may increase the contact angle of the inner surface of the wrappers, which in turn may increase the hydrophobic and wet tensile strength of the wrappers.

[0102] The basis weight of the first wrapper may be equal to the basis weight of the second wrapper. The basis weight of the first wrapper may be greater than the basis weight of the second wrapper. Preferably, the basis weight of the second wrapper is greater than the basis weight of the first wrapper.

[0103] The thickness of the first wrapper may be equal to the thickness of the second wrapper. The thickness of the first wrapper may be greater than the thickness of the second wrapper. Preferably, the thickness of the second wrapper is greater than the thickness of the first wrapper.

[0104] One or both of the first and second wrappers may have elements printed on at least one of their outer or inner surfaces. Only one of the first and second wrappers may have elements printed on at least one of their outer or inner surfaces. Preferably, only the second wrapper has elements printed on at least one of its outer or inner surfaces.

[0105] Printed elements may include at least one of the following: signs, text, images, letters, phrases, shapes, logos, colors, graphics, patterns, coverings (such as rip-release coverings), or combinations thereof.

[0106] One or both of the first and second wrappers may contain a filler. The filler content of one or both of the first and second wrappers may be 30 weight percent or less of the wrapper. The filler is preferably calcium carbonate.

[0107] One or both of the first and second wrappers may include one or more perforations, or may not include any perforations. Perforations through the wrappers may be achieved, for example, by laser perforation.

[0108] The first wrapper may have a permeability of 10 cholesta units or less, 7 cholesta units or less, 5 cholesta units or less, or 3 cholesta units or less.

[0109] The first wrapper may have a permeability of 1 cholesta unit or more, 3 cholesta units or more, 5 cholesta units or more, or 7 cholesta units or more.

[0110] The second wrapper may have a permeability of 10 cholesta units or less, 7 cholesta units or less, 5 cholesta units or less, or 3 cholesta units or less.

[0111] The second wrapper may have a permeability of 1 or more cholesta units, 3 or more cholesta units, 5 or more cholesta units, or 7 or more cholesta units.

[0112] The permeability of the wrapper can be determined according to the international standard test method ISO 2965:2019, and the results can be presented as cubic centimeters / minute / square centimeter, which may be referred to as "cholesterol units".

[0113] Each surface of the first and second wrappers may include a wire side and a non-wire side opposite the wire side. The wire side of the wrapper is the side of the wrapper formed in contact with the forming wire of the manufacturing machine. Each wire side of the first and second wrappers may face inward. Each non-wire side of the first and second wrappers may face outward.

[0114] The wire side of the first wrapper may have a contact angle greater than the contact angle of the non-wire side.

[0115] The side of the first wrapper with the smallest contact angle is preferably facing outwards.

[0116] The wire side of the second wrapper may have a contact angle greater than the contact angle of the non-wire side.

[0117] The side of the second wrapper with the smallest contact angle is preferably facing outwards.

[0118] Advantageously, providing the smallest contact angle to the wrapper on its outer surface improves the ease with which the printed element can be placed on the wrapper's outer surface.

[0119] The non-wire side of the second wrapper may have a contact angle greater than or equal to the contact angle of the non-wire side of the first wrapper. Preferably, the non-wire side of the first wrapper has a contact angle greater than or equal to the contact angle of the non-wire side of the second wrapper.

[0120] The wire side of the second wrapper may have a contact angle greater than or equal to the contact angle of the wire side of the first wrapper. Preferably, the wire side of the first wrapper has a contact angle greater than or equal to the contact angle of the wire side of the second wrapper.

[0121] Advantageously, providing a smaller contact angle on the surface to the wrapper allows printed elements to be brought onto that surface more easily.

[0122] For example, providing a smaller contact angle on the surface of a second wrapper than that of the first wrapper may allow printed elements on the second wrapper to be delivered to its surface more easily than on the first wrapper. This may, for example, allow for providing the second wrapper with printed elements, and the first wrapper without printed elements, while minimizing the cost of the first wrapper.

[0123] At least one of the first wrapper and the second wrapper may have a hydrophobic surface. That is, at least one of the first wrapper and the second wrapper may have a large contact angle on its surface.

[0124] The term "hydrophobic" refers to a surface that exhibits water-repellent properties. One method for determining this is by measuring the water contact angle, which is referred to herein simply as the "contact angle." The "contact angle" is conventionally measured through a liquid, where the liquid / vapor interface intersects with the solid surface. This quantifies the wettability of a solid surface by a liquid via Young's equation. Hydrophobicity or the water contact angle may also be determined by utilizing the TAPPI T558 test method, and the result is expressed as the interfacial contact angle and reported in degrees, ranging from approximately zero to approximately 180 degrees. The contact angle may also be measured according to EN 828:2013.

[0125] At least one side of the first wrapper (for example, one or both of the non-wire side and the wire side) may have a contact angle of 45 degrees or more, 50 degrees or more, 60 degrees or more, 65 degrees or more, or 75 degrees or more.

[0126] At least one side of the second wrapper (for example, one or both of the non-wire side and the wire side) may have a contact angle of 45 degrees or more, 50 degrees or more, 60 degrees or more, 65 degrees or more, or 75 degrees or more.

[0127] At least one side of the first wrapper (for example, one or both of the non-wire side and the wire side) may have a contact angle of 75 degrees or less, 65 degrees or less, or 60 degrees or less.

[0128] At least one side of the second wrapper (for example, one or both of the non-wire side and the wire side) may have a contact angle of 75 degrees or less, 65 degrees or less, or 60 degrees or less.

[0129] At least one side of the first wrapper (e.g., one or both of the non-wire side and the wire side) may have a contact angle of 45 to 75 degrees, 45 to 65 degrees, 45 to 60 degrees, 50 to 75 degrees, 50 to 65 degrees, 50 to 60 degrees, 60 to 75 degrees, 60 to 65 degrees, or 65 to 75 degrees.

[0130] At least one side of the second wrapper (e.g., one or both of the non-wire side and the wire side) may have a contact angle of 45 to 75 degrees, 45 to 65 degrees, 45 to 60 degrees, 50 to 75 degrees, 50 to 65 degrees, 50 to 60 degrees, 60 to 75 degrees, 60 to 65 degrees, or 65 to 75 degrees.

[0131] One or both of the first and second wrappers may or may not be embossed.

[0132] The term "embossing" is used herein to refer to protrusions formed on the surface of a wrapper. These protrusions may be engraved, molded, or stamped onto the wrapper. A portion of the wrapper that has such embossing is said to be embossed.

[0133] One or both of the first and second wrappers may have a side smoothness (Beck smoothness degree) of 50 Becks to 450 Becks, 100 Becks to 200 Becks, or 130 Becks to 170 Becks.

[0134] One or both of the first and second wrappers may have a side (e.g., their wire side) smoothness (Beck smoothness degree) of 60 Becks to 140 Becks, 80 Becks to 120 Becks, or 90 Becks to 110 Becks.

[0135] Advantageously, providing greater smoothness (higher Beck smoothness) on the surface of the wrapper makes it easier to apply printed elements to that surface.

[0136] Preferably, one or both sides of the first and second wrappers, which have the highest smoothness, face outwards.

[0137] Advantageously, providing the greatest smoothness on its outer surface to the wrapper improves the ease with which printed elements can be applied to the wrapper's outer surface.

[0138] Smoothness, expressed in Beck seconds (Beck smoothness degree), can be measured by a standard test using a BEKK Smoothness Tester, which generates a vacuum and measures the time it takes for the vacuum to drop from 50.66 kPa to 48.00 kPa. This test is approved by ISO standard 5627:1995.

[0139] One or both of the first wrapper and the second wrapper may have a Cobb value on at least one side (e.g., one or both of the wire side and the non-wire side) which is 30 grams per square meter or less, 28 grams per square meter or less, 26 grams per square meter or less, 24 grams per square meter or less, or 22 grams per square meter or less.

[0140] One or both of the first wrapper and the second wrapper may have a Cobb value on at least one side (e.g., one or both of the wire side and the non-wire side) which is 15 grams or more per square meter, 20 grams or more per square meter, 22 grams or more per square meter, 24 grams or more per square meter, 26 grams or more per square meter, or 28 grams or more per square meter.

[0141] One or both of the first and second wrappers may have a Cobb value on at least one side (e.g., one or both of the wire side and the non-wire side), which is 15 to 30 grams per square meter, 20 to 30 grams per square meter, 22 to 28 grams per square meter, or 24 to 26 grams per square meter.

[0142] As used herein, the term “Cobb value” refers to “Cobb60,” which is a measurement of the amount of water absorbed by a defined area of ​​paper through one-sided contact with water within 60 seconds. The Cobb value may be measured in accordance with ISO 535:2014.

[0143] Advantageously, reducing the Cobb value of the wrapper reduces water absorption into the wrapper, which can increase the wet tensile strength of the wrapper.

[0144] The first wrapper and the second wrapper may overlap each other. The first wrapper may be at least partially on top of the second wrapper. Preferably, the second wrapper is at least partially on top of the first wrapper.

[0145] The overlapping region of the first wrapper and the second wrapper may have a length parallel to the longitudinal axis of the article.

[0146] The overlapping length of the first and second wrappers in a direction parallel to the long axis of the article may be equal to the length of one or more of the hollow tubular elements.

[0147] The overlapping length of the first wrapper and the second wrapper in a direction parallel to the long axis of the article may be 5 millimeters or more, 10 millimeters or more, 15 millimeters or more, or 20 millimeters or more.

[0148] The overlapping length of the first and second wrappers in a direction parallel to the long axis of the article may be 25 millimeters or less, 20 millimeters or less, 15 millimeters or less, or 10 millimeters or less.

[0149] The overlapping length of the first and second wrappers in a direction parallel to the long axis of the article may be 5 to 25 millimeters, 5 to 20 millimeters, 5 to 10 millimeters, 10 to 15 millimeters, or 15 to 20 millimeters.

[0150] The aerosol generating article may include a downstream section located downstream of the rod of the aerosol generating substrate. The downstream section may include an intermediate section and a mouthpiece element.

[0151] The downstream section is preferably located immediately downstream of the rod of the aerosol generating substrate. In other words, the downstream section may be in contact with the downstream end of the rod of the aerosol generating substrate.

[0152] The intermediate section is preferably located immediately downstream of the rod of the aerosol generating substrate. In other words, the intermediate section may abut the downstream end of the rod of the aerosol generating substrate.

[0153] The downstream section preferably extends between the rod of the aerosol generating substrate and the downstream end of the aerosol generating article. In other words, the downstream end of the aerosol generating article may coincide with the downstream end of the downstream section.

[0154] The downstream section may have a length of 10 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, or 40 mm or more.

[0155] The downstream section may have a length of 70 mm or less, 60 mm or less, 50 mm or less, 40 mm or less, 30 mm or less, 25 mm or less, or 20 mm or less.

[0156] The downstream section may have lengths of 10mm to 70mm, 10mm to 60mm, 10mm to 50mm, 10mm to 40mm, 10mm to 30mm, 10mm to 25mm, 10mm to 20mm, 20mm to 70mm, 20mm to 60mm, 20mm to 50mm, 20mm to 40mm, 20mm to 30mm, 20mm to 25mm, 25mm to 70mm, 25mm to 60mm, 25mm to 50mm, 25mm to 40mm, 25mm to 30mm, 30mm to 70mm, 30mm to 60mm, 30mm to 50mm, 30mm to 40mm, 40mm to 70mm, 40mm to 60mm, or 40mm to 50mm.

[0157] The draw-out resistance (RTD) of the downstream section may be 0 millimeters of water column or more, 1 millimeter of water column or more, 2 millimeters of water column or more, 5 millimeters of water column or more, 10 millimeters of water column or more, 16 millimeters of water column or more, or 17 millimeters of water column or more.

[0158] The draw-out resistance (RTD) of the downstream section may be 100 millimeters of water column or less, 50 millimeters of water column or less, 40 millimeters of water column or less, 30 millimeters of water column or less, 20 millimeters of water column or less, or 19 millimeters of water column or less.

[0159] The draw-out resistance (RTD) of the downstream section may be 1 to 100 millimeters of water column, 2 to 50 millimeters of water column, 5 to 40 millimeters of water column, 10 to 30 millimeters of water column, 16 to 20 millimeters of water column, 17 to 19 millimeters of water column, or approximately 18 millimeters of water column.

[0160] The intermediate section comprises one or more hollow tubular elements.

[0161] The intermediate section may comprise a single hollow tubular element. In other words, the intermediate section may comprise only one hollow tubular element. Alternatively, the intermediate section may comprise two or more hollow tubular elements.

[0162] One of the one or more hollow tubular elements of the intermediate section may be provided immediately downstream of the rod of the aerosol generating substrate. In other words, one of the one or more hollow tubular elements may abut the downstream end of the rod of the aerosol generating substrate.

[0163] One or more hollow tubular elements may define the upstream end of the intermediate section.

[0164] At least one of the one or more hollow tubular elements may have a wall thickness of 100 micrometers to 2 millimeters, 0.8 millimeters to 1.2 millimeters, 1 millimeter to 2 millimeters, 1.5 millimeters to 2 millimeters, 1.6 millimeters to 2 millimeters, 150 micrometers to 1.5 millimeters, or 200 micrometers to 1.25 millimeters.

[0165] Preferably, at least one of the one or more hollow tubular elements has a width approximately equal to the width of the aerosol-generating article.

[0166] At least one of the one or more hollow tubular elements may have a width of 5 to 10 mm, 5.5 to 9 mm, or 6 to 8 mm.

[0167] One or more hollow tubular elements may have a lumen. The lumen of one or more hollow tubular elements may have any cross-sectional shape. The lumen of one or more hollow tubular elements may have a substantially circular cross-sectional shape. The width of the lumen of a hollow tubular element may be called the "internal width." This should be distinguished from the "width" of the hollow tubular element, which refers to the external width or outer width of the hollow tubular element, unless otherwise specified.

[0168] At least one of the one or more hollow tubular elements may have an inner width of 2 to 10 mm, 3 to 9 mm, 4 to 8 mm, or 5 to 7 mm.

[0169] At least one of the one or more hollow tubular elements may have a length of 3 mm or more, 4 mm or more, 5 mm or more, 6 mm or more, 7 mm or more, 10 mm or more, 15 mm or more, 20 mm or more, or 25 mm or more.

[0170] At least one of the one or more hollow tubular elements may have a length of 40 mm or less, 35 mm or less, 30 mm or less, 25 mm or less, 20 mm or less, 15 mm or less, 12 mm or less, or 10 mm or less.

[0171] At least one of the one or more hollow tubular elements may have a length of 5 mm to 40 mm, 5 mm to 30 mm, 5 mm to 25 mm, 5 mm to 20 mm, 5 mm to 15 mm, 5 mm to 10 mm, 10 mm to 40 mm, 10 mm to 30 mm, 10 mm to 25 mm, 10 mm to 20 mm, or 10 mm to 15 mm, 15 mm to 40 mm, 15 mm to 30 mm, 15 mm to 25 mm, 15 mm to 20 mm, 20 mm to 40 mm, 20 mm to 30 mm, 20 mm to 25 mm, 25 mm to 40 mm, or 25 mm to 30 mm.

[0172] At least one of the one or more hollow tubular elements may have a length of 5 to 15 mm, 6 to 15 mm, 7 to 15 mm, 5 to 12 mm, 6 to 12 mm, 7 to 12 mm, 5 to 10 mm, 6 to 10 mm, or 7 to 10 mm.

[0173] Aerosol-generating articles may be equipped with ventilation zones.

[0174] The ventilation zone may comprise one or more ventilation holes. These one or more ventilation holes may be perforations, for example, achieved through laser drilling. The one or more ventilation holes may be arranged in one or more rows circumferentially around the article. Preferably, each circumferential row of holes comprises 8 to 30 holes.

[0175] One or more vents may be provided along the intermediate section. One or more vents may be provided along at least one of one or more hollow tubular elements.

[0176] One or more vents may be provided along an intermediate section, located 5 to 25 mm from the downstream end of the article, 10 to 20 mm from the downstream end of the article, or 12 to 18 mm from the downstream end of the article.

[0177] One or more vents may extend through the peripheral walls of one or more hollow tubular elements. In this way, fluid communication can be established between a flow channel internally defined by one or more hollow tubular elements and the external environment.

[0178] Advantageously, providing at least one of one or more ventilated hollow tubular elements provides particularly efficient cooling of the aerosol. This rapid cooling of volatile species released as the aerosol-generating substrate heats up enhances the nucleation of aerosol particles.

[0179] Aerosol-generating articles may have a ventilation level of 45 percent or more, 50 percent or more, 60 percent or more, or 70 percent or more.

[0180] Aerosol-generating articles may have an air permeability level of 90 percent or less, 85 percent or less, 80 percent or less, 70 percent or less, or 60 percent or less.

[0181] As used herein, the term "ventilation level" refers to the volume ratio of the airflow entering the aerosol-generating article through the ventilation zone (ventilation airflow) to the sum of the aerosol airflow and the ventilation airflow. A higher ventilation level results in greater dilution of the aerosol flow delivered to the consumer.

[0182] One or more vents may be provided through one or both of the first and second wrappers.

[0183] In some embodiments, the aerosol generating article may be an aerosol generating article that does not include a ventilation zone.

[0184] At least one of the one or more hollow tubular elements may be formed from at least one of cardboard, paper, polymer materials, cellulosic materials, cellulose acetate, low-density polyethylene (LDPE), and polyhydroxyalkanoate (PHA). When the hollow tubular element is formed from paper, the paper may be crimped paper such as crimped heat-resistant paper or crimped sulfuric acid paper. Preferably, at least one of the one or more hollow tubular elements contains cellulose acetate tow. The cellulose acetate tow may have 2 to 4 denier per filament and a total denier of 25 to 40. Preferably, at least one of the one or more hollow tubular elements comprises a hollow acetate tube.

[0185] One or more hollow tubular elements may comprise a first hollow tubular element and a second hollow tubular element. The first hollow tubular element may be a hollow acetate tube or a cardboard tube. For example, the first hollow tubular element may be a hollow acetate tube (HAT). The second hollow tubular element may be a hollow acetate tube or a cardboard tube. For example, the second hollow tubular element may be a fine hollow acetate tube (FHAT). The inner width of the second hollow tubular element may be greater than the inner width of the first hollow tubular element. The wall thickness of the second hollow tubular element may be less than the wall thickness of the first hollow tubular element. For example, the wall thickness of the second hollow tubular element may be 0.8 mm to 1.2 mm, for example 1.05 mm. For example, the wall thickness of the second hollow tubular element may be 1.6 mm to 2 mm, for example 1.9 mm. The second hollow tubular element may be disposed downstream of the first hollow tubular element. One or both of the first and second hollow tubular elements may have a ventilation zone. Preferably, the second hollow tubular element has a ventilation zone positioned along the second hollow tubular element. The first tubular element may have a length of 3 to 13 mm, 6 to 10 mm, 7 to 9 mm, or about 8 mm. The second tubular element may have a length of 4 to 14 mm, 7 to 11 mm, 8 to 10 mm, or about 9 mm.

[0186] One or more hollow tubular elements may include hollow tubular cooling elements.

[0187] As used herein, “hollow tubular cooling element” refers to a component of an aerosol generating article located downstream of the aerosol generating substrate so that aerosols formed by volatile compounds released from the aerosol generating substrate during use pass through the hollow tubular cooling element and are cooled by the hollow tubular cooling element before being inhaled by a consumer.

[0188] The upstream end of the hollow tubular cooling element may come into contact with the downstream end of the rod of the aerosol generating substrate.

[0189] The hollow tubular cooling element may be a cardboard tube. In some preferred embodiments, the hollow tubular cooling element is a flanged cardboard tube.

[0190] Advantageously, cardboard is a cost-effective material that strikes a balance between being deformable to provide ease of insertion of articles into aerosol generators and being rigid enough to provide proper engagement of articles with the inside of the device. Thus, cardboard tubes may provide adequate resistance to deformation or compression during use.

[0191] A hollow tubular cooling element may be a paper tube. A hollow tubular cooling element may be a tube formed from spirally wound paper. A hollow tubular cooling element may be formed from multiple layers of paper.

[0192] The hollow tubular cooling element may contain polymer materials. For example, the hollow tubular cooling element may contain a polymer film. The polymer film may contain a cellulose film. The hollow tubular cooling element may contain low-density polyethylene (LDPE) or polyhydroxyalkanoate (PHA) fibers. The hollow tubular cooling element may contain cellulose acetate tow. The cellulose acetate tow may have 2 to 4 denier per filament and a total denier of 25 to 40. The hollow tubular cooling element is preferably formed from cellulose acetate. The hollow tubular cooling element is preferably comprised of a hollow acetate tube.

[0193] One or more hollow tubular elements may comprise hollow tubular support elements. The upstream end of the hollow tubular support element may abut the downstream end of the rod of the aerosol generating substrate.

[0194] One or more hollow tubular elements may be provided with a hollow tubular support element upstream of the hollow tubular cooling element. The upstream end of the hollow tubular cooling element may abut the downstream end of the hollow tubular support element.

[0195] The hollow tubular support element may be formed from one or more materials selected from the group consisting of cellulose acetate, cardboard, crimped paper such as crimped heat-resistant paper or crimped sulfuric acid paper, and polymer materials such as low-density polyethylene (LDPE). The hollow tubular support element is preferably formed from cellulose acetate. The hollow tubular support element is preferably comprised of a hollow acetate tube.

[0196] The intermediate section may further comprise a PLA (polylactic acid) plug. The PLA plug may contain crimped PLA. The PLA plug may be located downstream of one or more hollow tubular elements. The PLA plug may be provided as an alternative to the hollow tubular cooling element.

[0197] The hollow tubular support element may be located upstream of the PLA plug. The upstream end of the PLA plug may abut against the downstream end of the hollow tubular support element.

[0198] The PLA plugs may have lengths of 5 mm to 40 mm, 5 mm to 30 mm, 5 mm to 25 mm, 5 mm to 20 mm, 5 mm to 15 mm, 5 mm to 10 mm, 10 mm to 40 mm, 10 mm to 30 mm, 10 mm to 25 mm, 10 mm to 20 mm, or 10 mm to 15 mm, 15 mm to 40 mm, 15 mm to 30 mm, 15 mm to 25 mm, 15 mm to 20 mm, 20 mm to 40 mm, 20 mm to 30 mm, 20 mm to 25 mm, 25 mm to 40 mm, or 25 mm to 30 mm.

[0199] One or more hollow tubular elements may comprise one or both of hollow acetate tubes (HATs) or fine hollow acetate tubes (FHATs). Such hollow tubes may be made from cellulose acetate and are cylindrical components that may have a centrally located axial hole. HATs may function as one or more airflow cooling elements and airflow accelerating elements. FHATs may function as airflow decelerating elements.

[0200] One or more hollow tubular elements may include a HAT and an FHAT. The FHAT may be positioned downstream of the HAT. The inner width of the FHAT may be greater than the inner width of the HAT. The wall thickness of the HAT may be greater than the wall thickness of the FHAT. For example, the wall thickness of the HAT may be 0.8 mm to 1.2 mm, for example, 1.05 mm. For example, the wall thickness of the FHAT may be 1.6 mm to 2 mm, for example, 1.9 mm.

[0201] The hat may have a length of 3 mm to 13 mm, 6 mm to 10 mm, 7 mm to 9 mm, or approximately 8 mm.

[0202] FHAT may have a length of 4 mm to 14 mm, 7 mm to 11 mm, 8 mm to 10 mm, or approximately 9 mm.

[0203] One or both of the HAT and FHAT may have ventilation zones. The FHAT preferably includes ventilation zones along its length. For example, the FHAT may have 11 ventilation holes, each with a diameter of 0.11 millimeters.

[0204] One or more hollow tubular elements may provide a negligible level of drawdown resistance (RTD). The term “negligible level of RTD” is used to indicate an RTD of less than 1 millimeter of water column per 10 millimeters of length of the hollow tubular element, preferably less than 0.4 millimeters of water column per 10 millimeters of length of the hollow tubular element, and more preferably less than 0.1 millimeters of water column per 10 millimeters of length of the hollow tubular element.

[0205] Preferably, at least one of the one or more hollow tubular elements of the RTD is 10 millimeters of water column or less, 5 millimeters of water column or less, 2.5 millimeters of water column or less, 2 millimeters of water column or less, or 1 millimeter of water column or less.

[0206] At least one of the one or more hollow tubular elements of the RTD may have a water column of 0 millimeters or more, 0.25 millimeters or more, 0.5 millimeters or more, or 1 millimeter or more.

[0207] The mouthpiece element is located downstream of the aerosol-forming section. The mouthpiece element may also be located immediately downstream of the aerosol-forming section. In other words, the mouthpiece element may abut the downstream end of the aerosol-forming section.

[0208] The mouthpiece element is located downstream of the intermediate section. The mouthpiece element is located downstream of one or more hollow tubular elements in the intermediate section. The mouthpiece element may be located immediately downstream of the intermediate section. In other words, the mouthpiece element may abut the downstream end of the intermediate section. The mouthpiece element may extend between the intermediate section and the downstream end of the aerosol generating article. The mouthpiece element may be located immediately downstream of one or more hollow tubular elements. The mouthpiece element may extend between one or more hollow tubular elements and the downstream end of the aerosol generating article. The mouthpiece element may extend between the PLA (polylactic acid) plug and the downstream end of the aerosol generating article.

[0209] The mouthpiece element may extend to the downstream end of the downstream section. The mouthpiece element may be located at the downstream end of the aerosol-generating article. The downstream end of the mouthpiece element may define the downstream end of the aerosol-generating article.

[0210] The mouthpiece element is preferably a solid plug and is non-tubular. The mouthpiece element may have a substantially uniform cross-section.

[0211] The mouthpiece element may be an end-mouth filter. The mouthpiece element may be formed from a fibrous filter material. The mouthpiece element may be formed from a porous material. The mouthpiece element may be formed from a biodegradable material. The mouthpiece element may be formed from a cellulose material. It is preferable that the mouthpiece element be formed from cellulose acetate.

[0212] For example, a mouthpiece element may be formed from a bundle of cellulose acetate fibers having 10 to 15 denier per filament. For example, a mouthpiece element may be formed from a relatively low-density cellulose acetate toe, such as a cellulose acetate toe containing 12 denier fibers per filament.

[0213] Preferably, the mouthpiece element has low particle filtration efficiency. Preferably, the mouthpiece element is not permeable to air so that air does not enter the aerosol-generating article along the mouthpiece element.

[0214] The mouthpiece element may have a length of 5 mm or more, 6 mm or more, 10 mm or more, or 11 mm or more.

[0215] The mouthpiece element may have a length of 25 mm or less, 20 mm or less, 15 mm or less, 14 mm or less, 13 mm or less, 12 mm or less, 10 mm or less, or 8 mm or less.

[0216] The mouthpiece elements may have lengths of 5 mm to 25 mm, 10 mm to 25 mm, 5 mm to 20 mm, 10 mm to 20 mm, 10 mm to 14 mm, 11 mm to 13 mm, or approximately 12 mm.

[0217] The mouthpiece element may have a length of 5 to 10 mm, 6 to 8 mm, or approximately 7 mm.

[0218] The draw-out resistance (RTD) of the mouthpiece element per millimeter along the longitudinal axis of the aerosol-generating article may be 0.1 to 20 millimeters of water column, 0.2 to 10 millimeters of water column, 0.5 to 5 millimeters of water column or more, 1 to 2 millimeters of water column, 1.3 to 1.7 millimeters of water column, 1.4 to 1.6 millimeters of water column, or approximately 1.5 millimeters of water column.

[0219] The draw-out resistance (RTD) of the mouthpiece element may be 1 to 100 millimeters of water column, 2 to 50 millimeters of water column, 5 to 40 millimeters of water column, 10 to 30 millimeters of water column, 16 to 20 millimeters of water column, 17 to 19 millimeters of water column, or approximately 18 millimeters of water column.

[0220] The draw-to-draw (RTD) of the mouthpiece element may be 1 to 60 millimeters of water column, 2 to 30 millimeters of water column, 4 to 25 millimeters of water column, 5 to 18 millimeters of water column, 6 to 13 millimeters of water column, 9 to 12 millimeters of water column, or approximately 10.5 millimeters of water column.

[0221] The mouthpiece element may have a width approximately equal to the width of the aerosol-generating article. The width of the mouthpiece element may be substantially the same as the width of at least one of the one or more hollow tubular elements.

[0222] The width of the mouthpiece element may be 5 to 10 mm, 5.5 to 9 mm, or 6 to 8 mm.

[0223] The mouthpiece element may contain a flavoring agent, which may be provided in an appropriate form. For example, the mouthpiece element may contain one or more capsules, flavoring beads or granules, or one or more flavoring threads or filaments.

[0224] The aerosol generating article may include a flavor capsule. The flavor capsule is preferably located within the mouthpiece element. The flavor capsule is preferably a fragile capsule. For example, the flavor capsule can be broken to release the flavor it contains. The capsule may be broken by force applied by the user when the flavor it contains is desired. The flavor capsule may have an outer wall that defines an internal cavity in which the flavor is contained. The outer wall of the flavor capsule may be formed of a punctureable or fragile material.

[0225] The draw-to-drop (RTD) characteristics of the downstream section may be entirely or largely determined by the RTD characteristics of the mouthpiece element. In other words, the RTD of the mouthpiece element may completely define the RTD of the downstream section.

[0226] One or more components of the aerosol-generating article may be individually surrounded by a wrapper for the component itself, which is located under at least one of the first wrapper and the second wrapper.

[0227] At least one of the upstream element, the rod of the aerosol generating substrate, and the mouthpiece element may each be surrounded by individual wrappers located below at least one of the first wrapper and the second wrapper.

[0228] The aerosol generating article comprises a rod of aerosol generating substrate.

[0229] The rod of the aerosol generating substrate may have one of the following cross-sectional shapes: polygonal, substantially triangular, substantially elliptical, substantially rectangular, or substantially circular. Preferably, the rod of the aerosol generating substrate has a substantially circular cross-sectional shape.

[0230] The rod of the aerosol generating substrate has a rod width. The rod of the aerosol generating substrate may also have a rod length. The rod length is the maximum dimension of the rod in the longitudinal direction of the aerosol generating article. The rod width is the maximum dimension of the rod in the transverse direction perpendicular to the longitudinal direction.

[0231] The rod width may be 5 mm or more, 5.5 mm or more, 6 mm or more, 6.5 mm or more, or 7 mm or more.

[0232] The rod width may be 8 millimeters or less, or 7.5 millimeters or less.

[0233] The rod width may be 5 mm to 8 mm, 5 mm to 7.5 mm, or 5.5 mm to 8 mm, or 5.5 mm to 7.5 mm, or 6 mm to 8 mm, or 6 mm to 7.5 mm, or 6.5 mm to 8 mm, 6.5 mm to 7.5 mm, 7 mm to 8 mm, or 7 mm to 7.5 mm.

[0234] The length of the shim may be 1 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, 9 mm or more, 10 mm or more, 11 mm or more, 12 mm or more, 13 mm or more, 14 mm or more, 15 mm or more, 16 mm or more, 18 mm or more, 20 mm or more, 22 mm or more, 25 mm or more, or 28 mm or more.

[0235] The rod length may be 3 mm or less, 5 mm or less, 7 mm or less, 9 mm or less, 10 mm or less, 11 mm or less, 12 mm or less, 13 mm or less, 14 mm or less, 15 mm or less, 16 mm or less, 18 mm or less, 20 mm or less, 22 mm or less, 25 mm or less, or 30 mm or less.

[0236] The rod length may be 1 mm to 30 mm, 5 mm to 22 mm, 8 mm to 16 mm, 9 mm to 15 mm, 10 mm to 14 mm, 10 mm to 12 mm, 11 mm to 13 mm, approximately 12 mm, or approximately 11 mm.

[0237] The rod of the aerosol generating substrate contains the aerosol generating substrate.

[0238] The aerosol generating substrate rod may include the aerosol generating substrate and one or more additional components. For example, the aerosol generating substrate rod may include a susceptor. For example, the aerosol generating substrate rod may include a filler material that does not release volatile compounds when heated. The aerosol generating substrate rod may include a support material on which the aerosol generating substrate is deposited, loaded, or coated.

[0239] The mass of the aerosol generating substrate within the rod of the aerosol generating substrate may be 300 milligrams or less, 280 milligrams or less, 270 milligrams or less, 260 milligrams or less, or 250 milligrams or less. Preferably, the mass of the aerosol generating substrate within the rod of the aerosol generating substrate is 220 milligrams or less, 210 milligrams or less, or 200 milligrams or less.

[0240] The mass of the aerosol generating substrate within the rod of the aerosol generating substrate may be 10 milligrams to 300 milligrams, 50 milligrams to 280 milligrams, or 100 milligrams to 270 milligrams. Preferably, the mass of the aerosol generating substrate within the rod of the aerosol generating substrate is 10 milligrams to 220 milligrams, 50 milligrams to 220 milligrams, 100 milligrams to 220 milligrams, or 150 milligrams to 200 milligrams.

[0241] As used herein, the mass of aerosol-generating substrates in a rod of aerosol-generating substrates refers to the total mass of aerosol-generating substrates contained within the volume defined by the rod of aerosol-generating substrates. To measure the mass of aerosol-generating substrates in a rod of aerosol-generating substrates, the aerosol-generating substrates are removed from the rod and weighed. This may be repeated 20 times for 20 different individual aerosol-generating articles to obtain an average value. The mass of aerosol-generating substrates in a rod of aerosol-generating substrates may also be the dry mass of the aerosol-generating substrates in the rod of aerosol-generating substrates. The mass of the rod of aerosol-generating substrates may be determined after preparing the aerosol-generating articles in accordance with ISO standard 3402:1999.

[0242] The density of the aerosol generating substrate in the rod of the aerosol generating substrate may be 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter) or less, 650 kilograms per cubic meter (0.65 milligrams per cubic millimeter) or less, 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter) or less, 550 kilograms per cubic meter (0.55 milligrams per cubic millimeter) or less, 500 kilograms per cubic meter (0.50 milligrams per cubic millimeter) or less, 450 kilograms per cubic meter (0.45 milligrams per cubic millimeter) or less, 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter) or less, or 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) or less.

[0243] The density of the aerosol generating substrate in the rod of the aerosol generating substrate may be 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) or more, 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter) or more, 450 kilograms per cubic meter (0.45 milligrams per cubic millimeter) or more, 500 kilograms per cubic meter (0.50 milligrams per cubic millimeter) or more, 550 kilograms per cubic meter (0.55 milligrams per cubic millimeter) or more, 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter) or more, 650 kilograms per cubic meter (0.65 milligrams per cubic millimeter) or more, or 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter) or more.

[0244] The density of the aerosol generating substrate within the rod of the aerosol generating substrate is 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) to 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter), 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) to 500 kilograms per cubic meter (0.50 milligrams per cubic millimeter), and 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) to 1 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter), 350 kilograms per cubic meter (0.35 milligrams per cubic millimeter) to 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter), 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter) to 450 kilograms per cubic meter (0.45 milligrams per cubic millimeter), 400 kilograms per cubic meter (0.60 milligrams per cubic millimeter) 0.40 milligrams) ~ 500 kilograms per cubic meter (0.50 milligrams per cubic millimeter), 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter) ~ 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter), 400 kilograms per cubic meter (0.40 milligrams per cubic millimeter) ~ 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter), 500 kilograms per cubic meter (1 It may be 0.50 milligrams per cubic millimeter to 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter), 500 kilograms per cubic meter (0.50 milligrams per cubic millimeter) to 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter), or 600 kilograms per cubic meter (0.60 milligrams per cubic millimeter) to 700 kilograms per cubic meter (0.70 milligrams per cubic millimeter).

[0245] The density of aerosol-generating substrates within a rod of aerosol-generating substrates is calculated by dividing the total mass of aerosol-generating substrates within the rod by the volume of the rod (subtracting the volume taken up by the susceptor, if present). The volume of the rod of aerosol-generating substrates is calculated using the dimensions of the aerosol-generating substrates. The mass of aerosol-generating substrates within a rod of aerosol-generating substrates is determined by removing the aerosol-generating substrates from the rod and weighing them. This may be repeated 20 times for 20 different individual aerosol-generating articles to accept the average value of the density of aerosol-generating substrates within the rod of aerosol-generating substrates. The density of aerosol-generating substrates within a rod of aerosol-generating substrates may also be calculated on a dry weight basis. The density of aerosol-generating substrates within a rod of aerosol-generating substrates may also be determined after preparing the aerosol-generating articles according to ISO standard 3402:1999.

[0246] The aerosol generating substrate may be a solid aerosol generating substrate.

[0247] The aerosol generating substrate may contain tobacco material.

[0248] As used herein, the term “tobacco material” is used to describe any material containing tobacco, including but not limited to tobacco leaves, tobacco veins, tobacco stems, tobacco petioles, tobacco dust, puffed tobacco, reconstituted tobacco material, and homogenized tobacco material.

[0249] The aerosol generating substrate within the rod of the aerosol generating substrate may contain homogenized tobacco material. The term "homogenized tobacco material," as used herein, means material formed by agglomerating particulate tobacco.

[0250] The aerosol generating substrate may include one or more sheets of homogenized tobacco material. As used herein, the term “sheet” means a layered element having a width and length substantially greater than its thickness.

[0251] Each of the tobacco material sheets may individually have a length substantially equal to the length of the rod of the aerosol generating substrate.

[0252] The aerosol-generating substrate may include an aggregate of homogenized tobacco material sheets. As used herein, the term “gathered” is used to describe sheets that have been rolled up, folded, or compressed or shrunk substantially transversely to the longitudinal axis of a separate aerosol-generating article.

[0253] The homogenized tobacco material sheet may be crimped. As used herein, the term “crimped” means a sheet having a plurality of substantially parallel ridges or undulations. The aerosol generating substrate may include an assembly of crimped sheets of homogenized tobacco material. Preferably, when the aerosol generating article is assembled, the substantially parallel ridges or undulations extend along or parallel to the longitudinal axis of the aerosol generating article.

[0254] The homogenized tobacco material sheet may be a cast sheet. The cast sheet of homogenized tobacco material may contain tobacco particles having an average particle size (D95) of over 50 micrometers, 50 to 100 micrometers, 60 to 80 micrometers, 65 to 75 micrometers, or about 70 micrometers prior to the molding process.

[0255] As used herein, the term “average particle size (D95)” is used to indicate the median of the volume-based particle size distribution and is the particle diameter value at 95% of the cumulative distribution. The particle size of a particle can be analyzed by laser diffraction.

[0256] The aerosol generating substrate preferably includes an aerosol forming body. The aerosol forming body can be any suitable known compound or mixture of compounds that promotes the formation of a dense and stable aerosol during use. The aerosol forming body can promote the aerosol to be substantially resistant to thermal decomposition at the temperatures typically applied during use of the aerosol generating article. Suitable aerosol forming bodies include, for example, polyhydric alcohols such as triethylene glycol, 1,3-butanediol, propylene glycol, and glycerin; esters of polyhydric alcohols such as glycerol mono-, di-, or triacetate; aliphatic esters of mono-, di-, or polycarboxylic acids such as dimethyl dodecanediol and dimethyl tetradecanediol; and combinations thereof.

[0257] The aerosol-forming body may contain one or more of glycerin and propylene glycol. The aerosol-forming body may consist of glycerin or propylene glycol, or a combination of glycerin and propylene glycol.

[0258] The aerosol generating substrate may contain at least 5% by weight, at least 10% by weight, or at least 12% by weight of aerosol forming material, based on the dry weight of the aerosol generating substrate.

[0259] The aerosol generating substrate may contain 30% by weight or less, 25% by weight or less, or 20% by weight or less of an aerosol forming material, based on the dry weight of the aerosol generating substrate.

[0260] The aerosol generating substrate may contain 5% to 30% by weight, 5% to 25% by weight, or 5% to 20% by weight of aerosol forming material, based on the dry weight of the aerosol generating substrate.

[0261] The aerosol generating substrate may contain approximately 10% to 30% by weight, approximately 10% to 25% by weight, or approximately 10% to 20% by weight of aerosol forming material, based on the dry weight of the aerosol generating substrate.

[0262] The aerosol generating substrate may contain approximately 12% to 30% by weight, approximately 12% to 25% by weight, or approximately 12% to 20% by weight of aerosol forming material, based on the dry weight of the aerosol generating substrate.

[0263] The aerosol generating substrate may contain at least one tobacco material, a binder in a dry weight of approximately 1 percent to 5 percent, and glycerin in a dry weight of approximately 10 percent to 30 percent.

[0264] The aerosol generating substrate may contain tobacco cut filler, and the aerosol forming material content in the aerosol generating substrate is preferably at least about 8 weight percent of the aerosol generating substrate.

[0265] The aerosol generating substrate may contain strands of reconstituted tobacco or remanufactured tobacco. The aerosol generating substrate may also contain crumpled fiber pieces of reconstituted tobacco or remanufactured tobacco.

[0266] As used herein, the term “strand” describes an elongated element of a material having a length substantially greater than its width and thickness. The term “strand” should be considered to encompass strips, fragments, and any other homogenized plant material having a similar form. Strands of homogenized plant material may be formed from a sheet of homogenized plant material, for example, by cutting or dicing, or by other means, such as extrusion.

[0267] The rod of the aerosol generating substrate may contain at least one of nicotine, one or more aerosol-forming materials, and one or more carboxylic acids.

[0268] The aerosol generating substrate may contain at least one of the following: nicotine, one or more cellulosic agents, one or more aerosol-forming materials, and one or more solid aerosol generating substrates comprising nicotine, one or more carboxylic acids.

[0269] As used herein in relation to the present invention, the term "nicotine" is used to describe nicotine, nicotine base, or nicotine salt. The aerosol generating film may contain natural or synthetic nicotine.

[0270] The aerosol-generating film may contain one or more mononucleotide nicotine salts.

[0271] As used herein in connection with the present invention, the term "monobasic nicotine salt" is used to describe a nicotine salt of a monobasic acid.

[0272] The aerosol-generating film may contain one or more dibase nicotine salts.

[0273] As used herein in connection with the present invention, the term “dibasic nicotine salt” is used to describe a nicotine salt of a dibasic acid.

[0274] The aerosol generating film may contain one or more carboxylic acids. Preferably, the aerosol generating film contains one or more of lactic acid, benzoic acid, fumaric acid, and levulinic acid.

[0275] The aerosol generating substrate may be one of a solid aerosol generating film or a solid aerosol generating gel.

[0276] As used herein, the term “film” is used to describe a solid layered element having a thickness less than its width or length. A film may be self-supporting. In other words, a film may have cohesive and mechanical properties that allow it to be separated from a support surface, even if it is obtained by casting a film-forming formulation onto a support surface. Alternatively, a film may be placed on a support or sandwiched between other materials. This can enhance the mechanical stability of the film.

[0277] The aerosol generating substrate may contain multiple fragments of tobacco material, such as tobacco cut filler or homogenized tobacco material fragments.

[0278] As used herein, the term “slice” means an element having a length substantially greater than its width and thickness.

[0279] Homogenized tobacco material fragments may be formed from a sheet of homogenized tobacco material, for example, by cutting or shredding. Homogenized tobacco material fragments may also be formed by other methods, such as extrusion molding.

[0280] The tobacco material fragments may have a width of at least about 0.3 mm, at least about 0.5 mm, or at least about 0.6 mm.

[0281] The tobacco material fragments may have a width of approximately 2 millimeters or less, approximately 1.2 millimeters or less, or less than approximately 0.9 millimeters.

[0282] The tobacco material fragments may have widths of approximately 0.3 mm to 2 mm, approximately 0.3 mm to 1.2 mm, or approximately 0.3 mm to 0.9 mm.

[0283] The tobacco material fragments may have widths of approximately 0.5 mm to 2 mm, approximately 0.5 mm to 1.2 mm, or approximately 0.5 mm to 0.9 mm.

[0284] The tobacco material fragments may have widths of approximately 0.6 mm to 2 mm, approximately 0.6 mm to 1.2 mm, or approximately 0.6 mm to 0.9 mm.

[0285] The tobacco material fragments may have a length of at least about 10 millimeters.

[0286] The tobacco material fragments may have a length of approximately 40 millimeters or less.

[0287] The tobacco material fragments may have a length of approximately 10 millimeters to approximately 40 millimeters.

[0288] On a dry weight basis, at least about 20 weight percent of the multiple pieces of tobacco material may extend along the entire length of the rod of the aerosol generating substrate. On a dry weight basis, at least about 20 weight percent of the multiple pieces of tobacco material may have a length substantially equal to the length of the rod of the aerosol generating substrate.

[0289] On a dry weight basis, approximately 60% or less of the multiple pieces of tobacco material may extend along the entire length of the rod of the aerosol generating substrate. On a dry weight basis, approximately 60% or less of the multiple pieces of tobacco material may have substantially the same length as the length of the rod of the aerosol generating substrate.

[0290] On a dry weight basis, about 20 to 60 percent of the multiple pieces of tobacco material may extend along the entire length of the rod of the aerosol generating substrate. On a dry weight basis, about 20 to 60 percent of the multiple pieces of tobacco material may have a length substantially equal to the length of the rod of the aerosol generating substrate.

[0291] The aerosol generating substrate may contain pellets or granules of multiple tobacco materials, such as homogenized tobacco material.

[0292] At least about 60 weight percent of the pellets or granules may have a maximum dimension greater than about 1 millimeter, at least about 70 weight percent of the pellets or granules may have a maximum dimension greater than about 1 millimeter, or at least about 80 weight percent of the pellets or granules may have a maximum dimension greater than about 1 millimeter.

[0293] If the homogenized plant material is in the form of multiple pellets or granules, at least about 70 weight percent of the multiple pellets or granules may have a maximum dimension greater than about 0.5 millimeters, at least about 80 weight percent of the multiple pellets or granules may have a maximum dimension greater than about 0.5 millimeters, or at least about 90 weight percent of the multiple pellets or granules may have a maximum dimension greater than about 0.5 millimeters.

[0294] For example, at least about 80% by weight of the pellets or granules may have a maximum dimension greater than about 1 millimeter, and at least about 90% by weight of the pellets or granules may have a maximum dimension greater than about 0.5 millimeters.

[0295] The rod of the aerosol generating substrate may include a susceptor element disposed within the rod of the aerosol generating substrate.

[0296] As used herein, the term “susceptor” means a material that can be heated when penetrated by a changing magnetic field.

[0297] The susceptor element can be formed from any material that can inductively heat to a temperature sufficient to generate an aerosol from the aerosol generating substrate. For example, the susceptor element may include metal or carbon. The susceptor element may include, or consist of, ferromagnetic materials (such as ferromagnetic alloys, ferrite iron, or ferromagnetic steel or ferromagnetic stainless steel). Suitable materials may be aluminum or may include aluminum. The susceptor element may be formed from a 400 series stainless steel, such as grade 410, or grade 420, or grade 430 stainless steel.

[0298] The susceptor element can be at least partially surrounded by the rod of the aerosol generating substrate. The susceptor element can be completely surrounded by the rod of the aerosol generating substrate.

[0299] The susceptor element may be elongated and may be disposed substantially in the longitudinal direction within the rod of the aerosol generating substrate. The susceptor element can be positioned at a radially central position within the rod of the aerosol generating substrate and can extend along the longitudinal axis of the aerosol generating article.

[0300] As used herein, the term "elongated" means a component having a length dimension that is greater than its width dimension or its thickness dimension, for example, greater than twice its width dimension or its thickness dimension.

[0301] The length of the susceptor element may be less than or equal to the rod length.

[0302] The length of the susceptor element may be 99 percent or less of the rod length, 95 percent or less of the rod length, 90 percent or less of the rod length, 85 percent or less of the rod length, 80 percent or less of the rod length, 70 percent or less of the rod length, 60 percent or less of the rod length, or 50 percent or less of the rod length.

[0303] The length of the susceptor element may be 50 percent or more of the rod length, 60 percent or more of the rod length, 70 percent or more of the rod length, 80 percent or more of the rod length, 85 percent or more of the rod length, 90 percent or more of the rod length, 95 percent or more of the rod length, or 99 percent or more of the rod length.

[0304] The length of the susceptor element may be 70 to 99 percent of the rod length, 75 to 95 percent of the rod length, 80 to 95 percent of the rod length, or 85 to 95 percent of the rod length.

[0305] The susceptor element may extend substantially along the entire length of the rod of the aerosol-generating substrate. Advantageously, this can provide an optimized heat distribution within the rod of the aerosol-generating substrate when the susceptor element is heated.

[0306] The susceptor element may have a flat, planar portion. The susceptor element may be a flat, planar susceptor fragment.

[0307] As used herein, the term “flat plane” refers to a substantially cubic shape having a height significantly smaller than its width and length. For example, the width and length may each be at least twice the height of the cube. The height of a flat plane cube may also be referred to as the thickness of the susceptor element, or the thickness of the flat plane portion of the susceptor element.

[0308] The susceptor element may have a thickness of 0.01 to 2 mm, 0.5 to 2 mm, 10 to 500 micrometers, 10 to 100 micrometers, 35 to 85 micrometers, 45 to 75 micrometers, 55 to 65 micrometers, 57 to 63 micrometers, or 58 to 62 micrometers.

[0309] The aerosol-forming section may include an upstream section located upstream of the rod of the aerosol-generating substrate.

[0310] The upstream section is preferably located immediately upstream of the rod of the aerosol generating substrate. In other words, the upstream section may abut the upstream end of the rod of the aerosol generating substrate. The upstream section may define the upstream end of the aerosol forming section. The upstream section may extend between the upstream end of the aerosol generating article and the rod of the aerosol generating substrate.

[0311] An upstream section may contain one or more upstream elements.

[0312] One or more upstream elements may include solid cylindrical plug elements having a filled cross-section.

[0313] Advantageously, one or more upstream elements prevent direct physical contact with the upstream end of the rod of the aerosol-generating substrate. Furthermore, the presence of one or more upstream elements can be advantageous, for example, when the substrate contains particulate plant material, as it helps prevent any loss of the substrate. Advantageously, one or more upstream elements can prevent heat-generating elements, such as susceptors, from falling off the aerosol-generating article.

[0314] One or more upstream elements may be made of a porous material or may have multiple openings. This can be achieved, for example, by laser drilling. Preferably, the multiple openings are uniformly distributed across the cross-section of the upstream element.

[0315] The porosity or permeability of the upstream element may be advantageously designed to provide an aerosol-generating article having a specific overall drawdown resistance (RTD) that does not substantially affect the filtration provided by the other parts of the article.

[0316] One or more upstream elements may comprise a hollow tubular segment defining a cavity in the longitudinal direction that provides an unrestricted flow channel. In such cases, the draw resistance (RTD) of the hollow tubular segment may be negligible.

[0317] One or more upstream elements may be made of the same material as that used for one of the other components of the aerosol generating article, such as, for example, a mouthpiece element or one or more hollow tubular elements. Suitable materials for forming the upstream elements include filter materials, ceramics, polymeric materials, cellulose acetate, cardboard, zeolites, or an aerosol generating substrate. One or more upstream elements may comprise a plug of cellulose acetate. One or more upstream elements may comprise a hollow acetate tube or a cardboard tube.

[0318] One or more upstream elements preferably have a width substantially equal to the width of the aerosol generating article.

[0319] The length of at least one of one or more upstream elements along the longitudinal axis of the aerosol generating article may be 1 millimeter to 10 millimeters, 3 millimeters to 7 millimeters, 4 millimeters to 6 millimeters, or about 5 millimeters.

[0320] The draw resistance (RTD) of one or more upstream elements may be 1 millimeter of water column to 150 millimeters of water column, 2 millimeters of water column to 50 millimeters of water column, 3 millimeters of water column to 20 millimeters of water column, or 4 millimeters of water column to 10 millimeters of water column.

[0321] An aerosol generating system may be provided. The aerosol generating system may comprise any of the aerosol generating articles disclosed above and an aerosol generating device. The aerosol generating device may comprise a heating element or a part of a heating element for heating the aerosol generating article.

[0322] As used herein, the term “aerosol generator” means a device that interacts with an aerosol-generating substrate to generate an aerosol. In some examples, the aerosol generator heats the aerosol-generating substrate to facilitate the release of volatile compounds from the substrate.

[0323] As used herein, the term "aerosol generating system" refers to a combination of an aerosol generating device and an aerosol generating article.

[0324] Since the aerosol generating system of this disclosure comprises the aerosol generating article described herein, the advantages of the aerosol generating article described above also apply to the system itself.

[0325] The aerosol generator may further include a device cavity configured to receive at least a portion of an aerosol generating article. The device cavity may have a closed end and an open end. The aerosol generating article may be insertable into the device cavity through the open end. The device cavity may have substantially the same cross-sectional shape as the aerosol generating article.

[0326] The device cavity may have a device cavity length. The device cavity length may be substantially the same as or longer than the rod length. The device cavity length may be such that, when the aerosol generating article is received in the aerosol generating device, 75 percent or more of the rod length is received in the device cavity, 80 percent or more of the rod length is received in the device cavity, or 90 percent or more of the rod length is received in the device cavity.

[0327] Advantageously, providing a device cavity length that is substantially the same as or longer than the rod length ensures that the entire rod of the aerosol generating substrate can be accommodated within the device cavity, which can reduce insufficient heating of the downstream portion of the rod of the aerosol generating substrate and result in more uniform heating along the length of the rod.

[0328] The aerosol generator may also be equipped with a heat-generating element.

[0329] The heating element may be in the form of a pin or blade configured to be inserted into the rod of the aerosol generating substrate. The pin or blade may be located within the device cavity. When the aerosol generating substrate of the aerosol generating article is received within the device cavity, the pin or blade heating element may penetrate the aerosol generating substrate and be inserted into it, thereby heating the aerosol generating substrate from the inside.

[0330] When an aerosol-generating article is received by an aerosol generator, the pin or blade may penetrate the rod of the aerosol-generating substrate through the center of the cross-sectional surface of the rod that is substantially perpendicular to the length of the rod.

[0331] Advantageously, providing a pin or blade that penetrates the rod of the aerosol generating substrate through the center of the cross-sectional surface of the rod, which is substantially perpendicular to the rod length, can result in more uniform heating of the rod of the aerosol generating substrate.

[0332] Alternatively or additionally, the heating element may be an external heating element; that is, the heating element may be located around the periphery of the device cavity. The heating element may surround the aerosol-generating article when the aerosol-generating article is at least partially contained within the device cavity.

[0333] Alternatively, or additionally, as described above, the rod of the aerosol generating substrate may include a heating element in the form of a susceptor element disposed within the rod of the aerosol generating substrate.

[0334] The heating element may comprise one of a resistance heating element and a susceptor element.

[0335] The heating element may include a resistance heating element. The heating element may be a resistance heating element. The pin or blade may be a resistance heating element. The external heating element may be a resistance heating element.

[0336] The heating element may include an electrically resistive material. Suitable electrically resistive materials include, but are not limited to, semiconductors such as doped ceramics, conductive ceramics (e.g., molybdenum disilide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metal materials. Such composite materials may include doped ceramics or undoped ceramics. A suitable example of a doped ceramic is doped silicon carbide. Suitable examples of metals include titanium, zirconium, tantalum, and platinum group metals. Suitable examples of metal alloys include stainless steel, constantan, nickel-containing, cobalt-containing, chromium-containing, aluminum-containing, titanium-containing, zirconium-containing, hafnium-containing, niobium-containing, molybdenum-containing, tantalum-containing, tungsten-containing, tin-containing, gallium-containing, manganese-containing, and iron-containing alloys, as well as nickel, iron, cobalt, stainless steel-based superalloys, Timetal®, iron-aluminum alloys, and iron-manganese-aluminum alloys. Timetal® is a registered trademark of Titanium Metals Corporation, 1999 Broadway Suite 4300, Denver, Colorado. In composite materials, the electrical resistive material may be optionally embedded in, encapsulated in, or coated with an insulating material, depending on the required energy transfer dynamics and external physicochemical properties, or vice versa. The heating element may include a metallic, etched foil insulated between two layers of inert material. In this case, the inert material may include Kapton®, full-layer polyimide, or mica foil. Kapton® is a registered trademark of EI du Pont de Nemours and Company, 1007 Market Street, Wilmington, Delaware, 19898, USA.

[0337] The heating element may include a susceptor element. The heating element may also be a susceptor element. A pin or blade may be a susceptor element. An external heating element may be a susceptor element. The susceptor element may be disposed within the rod of the aerosol generating substrate.

[0338] As used herein, the term “susceptor” means a material that can be heated when penetrated by a changing magnetic field.

[0339] The aerosol generator may have the capability to generate a fluctuating electromagnetic field of 1 to 30 MHz, for example, 2 to 10 MHz, or for example, 5 to 7 MHz. The device may have the capability to generate a fluctuating magnetic field having a magnetic field strength (H field) of 1 to 5 kA / m, for example, 2 to 3 kA / m, or for example, about 2.5 kA / m.

[0340] The susceptor element may be formed from any material that can be inductively heated to a temperature sufficient to generate aerosols from the aerosol-generating substrate. For example, the susceptor element may contain metal or carbon.

[0341] The susceptor element may contain or consist of a ferromagnetic material (e.g., ferromagnetic alloy, ferrite iron, or ferromagnetic steel or ferromagnetic stainless steel). A suitable material may be aluminum or may contain aluminum. The susceptor element may be formed from 400 series stainless steel, for example, grade 410, or grade 420, or grade 430 stainless steel.

[0342] Different materials dissipate different amounts of energy when placed in an electromagnetic field with similar frequencies and magnetic field strengths. Thus, any parameter of a susceptor element, such as material type, length, width, and thickness, can be varied to provide the desired power distribution within a known electromagnetic field.

[0343] The susceptor element can be heated to temperatures exceeding 250 degrees Celsius.

[0344] If a susceptor element is provided, the aerosol generator may include an inductor coil arranged to inductively heat the susceptor element. The aerosol generator may include an inductor coil. If the aerosol generator includes a device cavity, the inductor coil may at least partially enclose the device cavity. The inductor coil may be arranged to coaxially enclose the device cavity.

[0345] The aerosol generator may further include a controller.

[0346] During use, the heating element may be controlled to operate within an operating temperature range of 150°C to 350°C, 200°C to 330°C, or 260°C to 320°C.

[0347] During use, the heating element may be controlled to heat to a peak temperature of 350 degrees Celsius or less, 335 degrees Celsius or less, or 320 degrees Celsius or less.

[0348] During use, the heating element may be controlled to heat to a peak temperature of 220°C to 350°C, 240°C to 335°C, or 260°C to 320°C.

[0349] The aerosol generator may further include a power source. The power source may be a DC power source. The power source may be a battery. The power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery such as a lithium-cobalt, lithium-acid-phosphate, or lithium polymer battery. The power source may be another form of charge storage device, such as a capacitor. The power source may require recharging and may have a capacity to store sufficient energy for one or more user operations, such as one or more aerosol generation experiences.

[0350] Herein, the present invention will be further explained with reference to the attached drawings, although this is purely illustrative. [Brief explanation of the drawing]

[0351] [Figure 1] This is a cross-sectional view of an aerosol generating article according to a first embodiment of the present disclosure. [Figure 2] This is a cross-sectional view of an aerosol generating article according to a second embodiment of the present disclosure. [Figure 3] This is a cross-sectional view of an aerosol generating article according to a third embodiment of the present disclosure. [Figure 4] Figure 1 is a cross-sectional view of an aerosol generating system comprising an aerosol generating article and an aerosol generating device. [Figure 5] Figure 2 is a cross-sectional view of an aerosol generating system comprising an aerosol generating article and an aerosol generating device. [Modes for carrying out the invention]

[0352] Figure 1 shows a schematic cross-sectional view of the aerosol generating article 10. The aerosol generating article 10 has a substantially cylindrical shape along its length. The aerosol generating article 10 comprises an aerosol generating base rod 12. The aerosol generating base rod 12 has a substantially cylindrical shape along its length and contains an assembly of homogenized tobacco sheets. The article further comprises a downstream section 17 located downstream of the aerosol generating base rod 12. The downstream section 17 includes a first hollow tubular element 14, a second hollow tubular element 15, and a mouth end filter 18. The mouth end filter 18 is located at the proximal (downstream) end of the article 10.

[0353] The downstream section 17 includes an intermediate section 17a located between the rod 12 of the aerosol generating substrate and the mouth end filter 18. The intermediate section 17a includes a first hollow tubular element 14 and a second hollow tubular element 15.

[0354] The aerosol generating article 10 further comprises an upstream element 11 at the distal (upstream) end of the article 10. The upstream element 11 is a solid cylindrical plug element having a filled cross section. The upstream element 11 contains cellulose acetate. The RTD of the upstream element is 5.5 millimeters of water column. The longitudinal axis 7 extends centrally along the longitudinal axis of the aerosol generating article 10. In this embodiment, the length of the upstream element 11 is 5 millimeters. The upstream element 11, the rod 12 of the aerosol generating substrate, the first hollow tubular element 14, the second hollow tubular element 15, and the mouth end filter 18 are arranged end-to-end along the longitudinal axis 7.

[0355] The aerosol generating article 10 comprises an upstream element 11, a rod 12 of an aerosol generating substrate, and an aerosol forming section 17b having an intermediate section 17a.

[0356] The upstream element 11, the aerosol generating substrate rod 12, the first hollow tubular element 14, and the second hollow tubular element 15 are surrounded by the first wrapper 16. The first wrapper 16 extends along the entire length of the aerosol forming section 17b. Naturally, in other embodiments, the first wrapper 16 does not have to extend along the entire length of the aerosol forming section 17b. The first wrapper 16 does not surround the mouth end filter 18. That is, the first wrapper 16 surrounds only the aerosol forming section 17b. The first wrapper 16 extends from the upstream end of the article 10. The first wrapper 16 is made of paper.

[0357] The second hollow tubular element 15 and the mouth end filter 18 are surrounded by a second wrapper 19. The second wrapper 19 overlaps with a portion of the first wrapper 16. The second wrapper 19 extends from the downstream end of the article 10.

[0358] The first wrapper 16 has a first wrapper length. In this embodiment, the first wrapper length is equal to the length of the aerosol-forming section 17b. In this embodiment, the first wrapper length is 33 millimeters. The first wrapper length is 73 percent of the length of article 10. The second wrapper 19 has a second wrapper length. In this embodiment, the second wrapper length is 21 millimeters. The second wrapper length is 47 percent of the length of article 10.

[0359] In this embodiment, the overlapping length of the first wrapper 16 and the second wrapper 19 in the direction parallel to the longitudinal axis 7 is equal to the length of the second hollow tubular element 15. That is, the overlapping length of the first wrapper 16 and the second wrapper is 9 millimeters.

[0360] The downstream end of the second wrapper 19 is downstream of the downstream end of the first wrapper 16. The upstream end of the first wrapper 16 is upstream of the upstream end of the second wrapper 19.

[0361] The thickness of the first wrapper 16 is 41 micrometers. The basis weight of the first wrapper 16 is 36 grams per square meter (gsm). The volume of the first wrapper 16 is 1.14 cubic centimeters per gram. The thickness of the second wrapper 19 is 45 micrometers. The basis weight of the second wrapper 19 is 39 grams per square meter (gsm). The volume of the second wrapper 19 is 1.15 cubic centimeters per gram.

[0362] Neither the first wrapper 16 nor the second wrapper 19 extends beyond the edge of the aerosol-generating article 10 in a direction parallel to the longitudinal axis 7.

[0363] Each of the first wrapper 16 and the second wrapper 19 forms part of the outer surface of the aerosol-generating article 10. That is, along the longitudinal axis 7, either the first wrapper 16 or the second wrapper 19 is the outermost layer in the radial direction of the article 10. The second wrapper 19 has printed elements on its outer surface, and in this embodiment, the printed elements are patterns and colors.

[0364] Naturally, in addition to the first wrapper 16 and the second wrapper 19, one or more of the components such as the upstream element 11, the aerosol generating substrate rod 12, and the mouth end filter 18 may each be surrounded by individual wrappers (not shown) located below at least one of the first wrapper 16 and the second wrapper 19.

[0365] The rod 12 of the aerosol generating substrate has a rod length parallel to the longitudinal axis 7 of the aerosol generating article 10 and a rod width perpendicular to the longitudinal axis 7 of the aerosol generating article 10. The rod width is substantially uniform along the rod length. In this embodiment, the rod width is 7 millimeters. In this embodiment, the rod length is 11 millimeters. The draw-out resistance (RTD) of the rod 12 of the aerosol generating substrate is 13.6 millimeters of water column. The length of the aerosol generating article 10 is 45 millimeters. The draw-out resistance (RTD) of the aerosol generating article 10 is 46 millimeters of water column.

[0366] The aerosol generating article 10 further comprises a susceptor element 12a disposed within the rod 12 of the aerosol generating substrate. The susceptor element 12a is configured to be heated when penetrated by a changing magnetic field. The length of the susceptor element 12a is approximately equal to the length of the rod; that is, the length of the susceptor element 12a is 11 millimeters. The width of the susceptor element 12a is 4 millimeters, and the thickness of the susceptor element 12a is 60 micrometers.

[0367] As described above, the downstream section 17 includes a mouth-end filter 18, a second hollow tubular element 15, and a first hollow tubular element 14. The downstream section 17 extends between the rod 12 of the aerosol generating substrate and the downstream end of the aerosol generating article 10. The downstream section 17 has a length of 29 millimeters. The second hollow tubular element 15 is downstream of the first hollow tubular element 14. The first hollow tubular element 14 is a hollow acetate tube. The second hollow tubular element 15 is a hollow acetate tube. The first hollow tubular element 14 abuts against the downstream end of the rod 12 of the aerosol generating substrate. The length of the first hollow tubular element 14 is 8 millimeters. The length of the second hollow tubular element 15 is 9 millimeters.

[0368] The first hollow tubular element 14 includes a lumen. The lumen of the first hollow tubular element 14 has a substantially circular cross-sectional shape. The second hollow tubular element 15 includes a lumen. The lumen of the second hollow tubular element 15 has a substantially circular cross-sectional shape. The width (internal width) of the lumen of the second hollow tubular element 15 is greater than the width (internal width) of the lumen of the first hollow tubular element 14. The wall thickness of the second hollow tubular element 15 is less than the wall thickness of the first hollow tubular element 14. The second hollow tubular element 15 may be called a fine hollow acetate tube (FHAT). The wall thickness of the second hollow tubular element 15 is 1.05 millimeters. The wall thickness of the second hollow tubular element 14 is 1.9 millimeters. The width of each of the first hollow tubular element 14 and the second hollow tubular element 15 is 7.1 millimeters of water column. The RTD formed by combining the first hollow tubular element 14 and the second hollow tubular element 15 has a water column of approximately 0 millimeters.

[0369] The second hollow tubular element 15 is provided with a ventilation zone located along the second hollow tubular element 15. It will be understood that the ventilation zone may be provided alternatively or additionally along the first hollow tubular element 14. The ventilation zone includes one or more rows of ventilation holes 13 arranged circumferentially around the second hollow tubular element 15 in a cross section substantially perpendicular to the longitudinal axis 7 of the aerosol-generating article 10. The ventilation holes 13 are perforations through the wall of the second hollow tubular element 15. The ventilation level of the aerosol-generating article 10 is approximately 50 percent. Each circumferential row of ventilation holes 13 contains 11 holes. The ventilation holes 13 extend through both the first wrapper 16 and the second wrapper 19 in a direction perpendicular to the longitudinal axis 7. The distance of the ventilation holes 13 from the downstream end of the article 10 is 18 millimeters.

[0370] The mouth end filter 18 is located at the downstream end of the aerosol generating article 10. The mouth end filter 18 abuts against the downstream end of the second hollow tubular element 15. The mouth end filter 18 contains a low-density cellulose acetate filter segment. The RTD of the mouth end filter 18 is approximately 18 millimeters of water column. The length of the mouth end filter 18 is 12 millimeters. The width of the mouth end filter 18 is 7.2 millimeters.

[0371] Figure 2 shows a schematic cross-sectional view of the aerosol generating article 20. The aerosol generating article 20 has a substantially cylindrical shape along its length. The aerosol generating article 20 is provided with an aerosol generating base rod 22 at the distal end of the article 20. The aerosol generating base rod 22 has a substantially cylindrical shape along its length and contains an assembly of homogenized tobacco sheets. The article further comprises a downstream section 27 located downstream of the aerosol generating base rod 22. The downstream section 27 includes a hollow tubular element 24, a PLA (polylactic acid) plug 25, and a mouth-end filter 28. The mouth-end filter 28 is located at the proximal end of the article 20. The longitudinal axis 7 extends centrally along the longitudinal axis of the aerosol generating article 20. The aerosol generating base rod 22, the hollow tubular element 24, the PLA plug 25, and the mouth-end filter 28 are arranged end-to-end along the longitudinal axis 7.

[0372] The downstream section 27 includes an intermediate section 27a located between the rod 22 of the aerosol generating substrate and the mouth end filter 28. The intermediate section 27a includes a hollow tubular element 24 and a PLA plug 25.

[0373] The aerosol generating article 20 comprises an aerosol generating base rod 22 and an aerosol forming section 27b having an intermediate section 27a.

[0374] The rod 22, hollow tubular element 24, and PLA plug 25 of the aerosol generating substrate are surrounded by a first wrapper 26. The first wrapper 26 extends along the entire length of the aerosol forming section 27b. Naturally, in other embodiments, the first wrapper 26 does not have to extend along the entire length of the aerosol forming section 27b. The first wrapper 26 does not surround the mouth end filter 28. That is, the first wrapper 26 surrounds only the aerosol forming section 27b. The first wrapper 26 is made of paper.

[0375] The PLA plug 25 and the mouth end filter 28 are surrounded by a second wrapper 29. The second wrapper 29 overlaps with a portion of the first wrapper 26. The second wrapper 29 extends from the downstream end of the article 20.

[0376] The first wrapper 26 has a first wrapper length. In this embodiment, the first wrapper length is equal to the length of the aerosol-forming section 27b. In this embodiment, the first wrapper length is 38 micrometers. The first wrapper length is 84 percent of the length of article 20. The second wrapper 29 has a second wrapper length. In this embodiment, the second wrapper length is 20 millimeters. The second wrapper length is 44 percent of the length of article 20.

[0377] In this embodiment, the overlapping length of the first wrapper 26 and the second wrapper 29 in a direction parallel to the long axis of the article is 13 millimeters.

[0378] The downstream end of the second wrapper 29 is located downstream of the downstream end of the first wrapper 26 along the long axis 7. The upstream end of the first wrapper 26 is located upstream of the upstream end of the second wrapper 29.

[0379] The thickness of the first wrapper 26 is 41 micrometers. The basis weight of the first wrapper 26 is 36 grams per square meter (gsm). The volume of the first wrapper 26 is 1.14 cubic centimeters per gram. The thickness of the second wrapper 29 is 45 micrometers. The basis weight of the second wrapper 29 is 39 grams per square meter (gsm). The volume of the second wrapper 29 is 1.15 cubic centimeters per gram.

[0380] Neither the first wrapper 26 nor the second wrapper 29 extends beyond the edge of the aerosol-generating article 20 in a direction parallel to the longitudinal axis 7.

[0381] Each of the first wrapper 26 and the second wrapper 29 forms part of the outer surface of the aerosol-generating article 20. That is, along the longitudinal axis 7, either the first wrapper 26 or the second wrapper 29 is the outermost layer in the radial direction of the article 10. The second wrapper 29 has printed elements on the outer surface of the second wrapper 19, and in this embodiment, the printed elements are patterns and colors.

[0382] The rod 22 of the aerosol generating substrate has a rod length parallel to the longitudinal axis 7 of the aerosol generating article 20. The rod 22 of the aerosol generating substrate has a rod width perpendicular to the longitudinal axis 7 of the aerosol generating article 20. The rod width is substantially uniform along the rod length. In this embodiment, the rod width is 7.2 millimeters. In this embodiment, the rod length is 12 millimeters. The length of the aerosol generating article 20 is 45 millimeters.

[0383] As described above, the downstream section 22 includes a mouth-end filter 28, a PLA (polylactic acid) plug 25, and a hollow tubular element 24. The downstream section 27 extends between the rod 21 of the aerosol generating substrate and the downstream end of the aerosol generating article 20. The downstream section 27 has a length of 33 millimeters.

[0384] The PLA plug 25 is located downstream of the hollow tubular element 24. The hollow tubular element 24 is a hollow acetate tube. The hollow tubular element 24 abuts against the downstream end of the rod 22 of the aerosol generating substrate. The length of the hollow tubular element 24 is 8 millimeters. The length of the PLA plug 25 is 18 millimeters. The hollow tubular element 24 contains a lumen. The lumen of the hollow tubular element 24 has a substantially circular cross-sectional shape. The wall thickness of the hollow tubular element 24 is 0.25 millimeters. The outer diameter of the hollow tubular element 24 is 7.2 millimeters. The RTD of the hollow tubular element 24 is approximately 0 millimeters of water column.

[0385] The mouth end filter 28 is located at the downstream end of the aerosol generating article 10. The mouth end filter 28 abuts against the downstream end of the PLA plug 25. The mouth end filter 28 contains a low-density cellulose acetate filter segment. The RTD of the mouth end filter 28 is approximately 8 millimeters of water column. The length of the mouth end filter 28 is approximately 7 millimeters.

[0386] Figure 3 shows a schematic cross-sectional view of the aerosol generating article 30. The aerosol generating article 30 has a substantially circular cross-sectional shape along its length. The aerosol generating article 30 comprises an aerosol generating base rod 32. The aerosol generating base rod 32 has a substantially cylindrical shape along its length and contains an assembly of homogenized, crumpled tobacco sheets.

[0387] Article 30 further comprises a downstream section 37 located downstream of the rod 32 of the aerosol generating substrate. The downstream section 37 includes an end filter 38. The end filter 38 is located at the proximal end of article 30. The longitudinal axis 7 extends centrally along the longitudinal axis of the aerosol generating article 30. The downstream section 37 also includes a hollow tubular element 34 containing a tubular body that defines a cavity 34b extending from the upstream end of the tubular body to the downstream end of the tubular body. The hollow tubular element (hereinafter referred to as the flanged tube 34) also includes a folded end portion that forms an upstream end wall 34c at the upstream end of the tubular body. The rod 32 of the aerosol generating substrate, the flanged tube 34, and the end filter 38 are arranged end-to-end along the longitudinal axis 7.

[0388] The downstream section 37 includes an intermediate section 37a located between the rod 32 of the aerosol generating substrate and the mouth end filter 38. The intermediate section 37a includes a flanged pipe 34.

[0389] The aerosol generating article 30 further comprises an upstream element 31 at the distal end of the article 30. The upstream element 31 comprises a tubular segment. In this embodiment, the length of the upstream element 31 is 5 millimeters.

[0390] The aerosol generating article 30 comprises an upstream element 31, a rod 32 of an aerosol generating substrate, and an aerosol forming section 37b having an intermediate section 37a.

[0391] The upstream element 31, the aerosol generating substrate rod 32, and the flange tube 34 are surrounded by a first wrapper 36. The first wrapper 36 extends along the entire length of the aerosol forming section 37b. Naturally, in other embodiments, the first wrapper 36 does not have to extend along the entire length of the aerosol forming section 37b. The first wrapper 36 does not surround the mouth end filter 38. That is, the first wrapper 36 surrounds only the aerosol forming section 37b. The first wrapper 36 extends from the upstream end of the article 30. The first wrapper 36 is made of paper.

[0392] A portion of the flange tube 34 and the entire length of the mouth end filter 18 are enclosed by a second wrapper 39. The second wrapper 39 overlaps with a portion of the first wrapper 36. The second wrapper 19 extends from the downstream end of the article 30.

[0393] The first wrapper 36 has a first wrapper length. In this embodiment, the first wrapper length is equal to the length of the aerosol-forming section 37b. In this embodiment, the first wrapper length is 38 millimeters. The first wrapper length is 84 percent of the length of article 30. The second wrapper 39 has a second wrapper length. In this embodiment, the second wrapper length is 26 millimeters. The second wrapper length is 58 percent of the length of article 30.

[0394] In this embodiment, the overlapping length of the first wrapper 36 and the second wrapper 39 in a direction parallel to the long axis of the article is 19 millimeters.

[0395] The downstream end of the second wrapper 39 is downstream of the downstream end of the first wrapper 36. The upstream end of the first wrapper 36 is upstream of the upstream end of the second wrapper 39.

[0396] The thickness of the first wrapper 36 is 41 micrometers. The basis weight of the first wrapper 36 is 36 grams per square meter (gsm). The volume of the first wrapper 36 is 1.14 cubic centimeters per gram. The thickness of the second wrapper 39 is 66 micrometers. The basis weight of the second wrapper 39 is 58 grams per square meter (gsm). The volume of the second wrapper 39 is 1.14 cubic centimeters per gram.

[0397] Neither the first wrapper 36 nor the second wrapper 39 extends beyond the edge of the aerosol-generating article 30 in a direction parallel to the longitudinal axis 7.

[0398] Each of the first wrapper 36 and the second wrapper 39 forms part of the outer surface of the aerosol-generating article 30. That is, along the longitudinal axis 7, either the first wrapper 36 or the second wrapper 39 is the outermost layer in the radial direction of the article 30. The second wrapper 39 has printed elements on its outer surface, and in this embodiment, the printed elements are patterns and colors.

[0399] The rod 32 of the aerosol generating substrate has a rod length parallel to the longitudinal axis 7 of the aerosol generating article 30. The rod 32 of the aerosol generating substrate has a rod width perpendicular to the longitudinal axis 7 of the aerosol generating article 30. The rod width is substantially uniform along the rod length. In this embodiment, the rod width is 7.1 millimeters. In this embodiment, the rod length 28 is 12 millimeters. The length of the aerosol generating article is 45 millimeters.

[0400] As described above, the downstream section 37 includes a mouth-end filter 38 and a flanged tube 34. The downstream section 37 extends between the rod 32 of the aerosol generating substrate and the downstream end of the aerosol generating article 30. The downstream section 37 has a length of 28 millimeters.

[0401] The flange tube 34 abuts against the downstream end of the rod 32 of the aerosol generating substrate. The upstream end wall 34c of the flange tube 34 demarcates the opening 34d, which allows airflow between the cavity 34b and the outside of the flange tube 34. In particular, aerosols can flow from the rod 32 of the aerosol generating substrate through the opening 34d into the cavity 34b. Since the cavity 34b of the flange tube 34 is substantially empty, substantially unrestricted airflow is possible along the cavity 34b. As a result, the RTD of the flange tube 34 can be localized at a specific axial position of the flange tube 34, i.e., at the upstream end wall 34c, and can be controlled through a selected configuration of the upstream end wall 34c and its corresponding opening 34d. In this embodiment, the RTD of the flange tube 34 (which is essentially the RTD of the upstream end wall 34c) is about 10 millimeters of water column.

[0402] The upstream end wall 34c extends substantially transversely with respect to the longitudinal axis 7 of the aerosol generating article 30. The opening 34d is the only opening in the upstream end wall 34c, and the opening 34d is located at the generally radially centered position of the flange tube 34. As a result, the upstream end wall 34c is generally annular in shape. The combination of the upstream end wall 34c and its corresponding opening 34d provides an effective barrier arrangement that can restrict the movement of the rod 32 of the aerosol generating substrate while also allowing aerosols to flow from the rod 32 of the aerosol generating substrate through the opening 34d into the cavity 34b. The flange tube 34 has a length of about 21 millimeters and an external width of about 7.1 millimeters. The flange tube 34 is formed from a paper material such as paper, cardboard, or thick paper. In this embodiment, the cavity 34b of the flange tube 34 has a substantially circular cross-sectional shape.

[0403] The flanged pipe 34 includes a ventilation zone along the flanged pipe 34. The ventilation zone includes one or more rows of ventilation holes 33 arranged circumferentially around the hollow pipe in a cross section substantially perpendicular to the longitudinal axis 7 of the aerosol-generating article 30. The ventilation holes 33 are perforations through the wall of the flanged pipe 34. The ventilation level of the aerosol-generating article 30 is approximately 75 percent. Each circumferential row of ventilation holes 33 contains 8 to 30 holes. The ventilation holes 33 extend through both the first wrapper 36 and the second wrapper 39 in a direction perpendicular to the longitudinal axis 7. The distance of the ventilation holes 33 from the downstream end of the article 30 is 16 millimeters.

[0404] The end-of-mouth filter 38 is located at the downstream end of the aerosol generating article 30. The end-of-mouth filter 38 abuts against the flanged pipe 34. The end-of-mouth filter 38 contains a low-density cellulose acetate filter segment. The RTD of the end-of-mouth filter 38 is approximately 8 millimeters of water column. The length of the end-of-mouth filter 38 is approximately 7 millimeters.

[0405] Figure 4 shows a schematic cross-sectional view of a portion of an aerosol generating system 1000, which includes the aerosol generating article 10 and the aerosol generating device 100 shown in Figure 1.

[0406] In this embodiment, the aerosol generating article 10 includes a susceptor element 12a disposed within the rod 12 of the aerosol generating substrate. The susceptor element 12a is configured to be heated when penetrated by a changing magnetic field.

[0407] The aerosol generator 100 further comprises an inductor coil 126 that surrounds the device cavity 121 and the susceptor element 12a. The inductor coil 126 is arranged to generate a changing magnetic field within the device cavity 121 that penetrates the susceptor element 12a and inductively heats the susceptor element 12a.

[0408] The device cavity 121 is configured to receive at least a portion of the aerosol-generating article 10. The distal end of the device cavity 121 has a closed end. The proximal end of the device cavity 121 has an open end. The aerosol-generating article 10 can be inserted into the device cavity 121 through the open end of the device cavity 221.

[0409] When in use, the user inserts the aerosol generating article 10 into the device cavity 121 of the aerosol generating device 100.

[0410] The aerosol generator 100 further comprises a power supply (not shown) and electronic equipment (not shown) arranged to supply power to an inductor coil 226 to generate a changing magnetic field within the device cavity 121 and inductively heat the susceptor element 12a.

[0411] The susceptor element 12a heats the rod 12 of the aerosol generating substrate when the aerosol generating article 10 is received into the device cavity 121. The operation of this inductor coil 126 may be performed manually, or it may occur automatically in response to the user inhaling the aerosol generating article 10 when the aerosol generating article 10 is inserted into the device cavity 121.

[0412] The entire length of the rod 12 of the aerosol generating substrate is received within the device cavity 121. The device cavity 121 has a substantially circular cross-sectional shape. The device cavity 121 has substantially the same cross-sectional shape as the rod 12 of the aerosol generating substrate. The ventilation holes 13 of the second hollow tubular element 15 are not received within the device cavity 121.

[0413] During use, the inductor coil 126 is controlled to heat the susceptor element 12a within a defined operating temperature range below the maximum operating temperature. The operating temperature of the susceptor element 12a is approximately 350 degrees Celsius.

[0414] Figure 5 shows a schematic cross-sectional view of a portion of an aerosol generating system 2000, which includes the aerosol generating article 20 shown in Figure 2 and an aerosol generating device 200.

[0415] The aerosol generator 200 includes a heating element in the form of a blade 220. The blade 220 is a resistance heating element. The blade 220 is installed in a device cavity 221. The device cavity 221 is configured to receive at least a portion of the aerosol generating article 20. The distal end of the device cavity 221 has a closed end. The proximal end of the device cavity 221 has an open end. The aerosol generating article 20 can be inserted into the device cavity 221 through the open end of the device cavity 221.

[0416] When in use, the user inserts the aerosol generating article 20 into the device cavity 221 of the aerosol generating device 200 so that the blade 220 is inserted into the rod 22 of the aerosol generating base of the aerosol generating article 20. The blade 220 tapers towards the tip at the end of the blade so that the tip of the blade 220 is configured to penetrate the rod 22 of the aerosol generating base.

[0417] The aerosol generator 200 further comprises a power supply (not shown) and electronic equipment (not shown) that enable the blade 220 to be activated to heat the rod 22 of the aerosol generating substrate when the aerosol generating article 20 is received in the device cavity 221. Such operation may be performed manually or may occur automatically in response to the user inhaling the aerosol generating article 20 when the aerosol generating article 20 is inserted into the device cavity 221.

[0418] As shown in Figure 5, a portion of the aerosol generating article 20 is received within the device cavity 221 of the aerosol generating device 20, and the blade 220 penetrates the rod 22 of the aerosol generating substrate along the longitudinal axis 7 of the aerosol generating article. The entire length of the rod 22 of the aerosol generating substrate is received within the device cavity 221. The device cavity 221 has a substantially circular cross-sectional shape. The device cavity 221 has substantially the same cross-sectional shape as the rod 22 of the aerosol generating substrate.

[0419] During use, the blade 220 is controlled to operate within a defined operating temperature range below the maximum operating temperature. The operating temperature range of the blade 220 is approximately 350 degrees Celsius. [Examples]

[0420] A non-exclusive list of non-limiting embodiments is provided below. One or more features of these embodiments may be combined with one or more features of other embodiments, models, or aspects described herein.

[0421] Example 1: Aerosol-generating article, Aerosol-forming section, Rods of aerosol generating substrates, and An aerosol-forming section comprising an intermediate section located downstream of the rod of an aerosol-generating substrate, which includes one or more hollow tubular elements, A mouthpiece element located downstream of the aerosol formation section, At least two rappers, A first wrapper that surrounds only the aerosol-forming section, having a volume of 1.42 cubic centimeters or less per gram, an aerosol generating article comprising at least two wrappers, including a second wrapper that surrounds at least a portion of a mouthpiece element. Example 2: The first wrapper has a volume of 1.38 cubic centimeters or less per gram, optionally 1.37 cubic centimeters or less per gram, optionally 1.3 cubic centimeters or less per gram, or optionally 1.23 cubic centimeters or less per gram, and The aerosol generating article according to Example 1, wherein the second wrapper has a volume of one or both of the following: 1.7 cubic centimeters or less per gram, optionally 1.6 cubic centimeters or less per gram, optionally 1.5 cubic centimeters or less per gram, optionally 1.42 cubic centimeters or less per gram, optionally 1.38 cubic centimeters or less per gram, optionally 1.37 cubic centimeters or less per gram, optionally 1.3 cubic centimeters or less per gram, or optionally 1.23 cubic centimeters or less per gram. Example 3: The first wrapper has a volume of 0.75 cubic centimeters or more per gram, optionally 0.80 cubic centimeters or more per gram, optionally 0.85 cubic centimeters or more per gram, optionally 0.90 cubic centimeters or more per gram, optionally 0.93 cubic centimeters or more per gram, optionally 0.96 cubic centimeters or more per gram, or optionally 1.1 cubic centimeters or more per gram, and The aerosol generating article according to Example 1 or Example 2, wherein the second wrapper has a volume of 0.75 cubic centimeters or more per gram, optionally 0.80 cubic centimeters or more per gram, optionally 0.85 cubic centimeters or more per gram, optionally 0.90 cubic centimeters or more per gram, optionally 0.93 cubic centimeters or more per gram, optionally 0.96 cubic centimeters or more per gram, optionally 1 cubic centimeter or more per gram, optionally 1.1 cubic centimeters or more per gram, optionally 1.2 cubic centimeters or more per gram, optionally 1.3 cubic centimeters or more per gram, or optionally 1.4 cubic centimeters or more per gram. Example 4: The first wrapper is 0.75 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram Cubic centimeters to 1.42 cubic centimeters per gram, optionally 1.1 cubic centimeters to 1.42 cubic centimeters per gram, optionally 0.75 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.80 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.85 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.90 cubic centimeters to 1.38 cubic centimeters per gram Cubic centimeters, optionally 0.93 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 1.1 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0 cubic centimeters per gram 0.85 cubic centimeters to 1.37 cubic centimeters per gram, optionally 0.90 cubic centimeters to 1.37 cubic centimeters per gram, optionally 0.93 cubic centimeters to 1.37 cubic centimeters per gram, optionally 0.96 cubic centimeters to 1.37 cubic centimeters per gram, optionally 1.1 cubic centimeters to 1.37 cubic centimeters per gram, optionally 0.75 cubic centimeters to 1.3 cubic centimeters, optionally 0.80 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 1.1 cubic centimeters per gram to 1.30 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1 gram Having a volume of 1.23 cubic centimeters per gram, optionally 0.80 cubic centimeters to 1.23 cubic centimeters per gram, optionally 0.85 cubic centimeters to 1.23 cubic centimeters per gram, optionally 0.90 cubic centimeters to 1.23 cubic centimeters per gram, optionally 0.93 cubic centimeters to 1.23 cubic centimeters per gram, optionally 0.96 cubic centimeters to 1.23 cubic centimeters per gram, or optionally 1.1 cubic centimeters to 1.23 cubic centimeters per gram, and. The second wrapper is 0.75 cubic centimeters per gram to 1.7 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.7 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.7 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.7 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.7 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram. - 1.7 cubic centimeters per gram, optional 1 cubic centimeter per gram - 1.7 cubic centimeters per gram, optional 1.1 cubic centimeters per gram - 1.7 cubic centimeters per gram, optional 1.2 cubic centimeters per gram - 1.7 cubic centimeters per gram, optional 1.3 cubic centimeters per gram - 1.7 cubic centimeters per gram, optional 1.4 cubic centimeters per gram - 1.7 cubic centimeters per gram, optional 0.75 cubic centimeters to 1.6 cubic centimeters per gram, optionally 0.80 cubic centimeters to 1.6 cubic centimeters per gram, optionally 0.85 cubic centimeters to 1.6 cubic centimeters per gram, optionally 0.90 cubic centimeters to 1.6 cubic centimeters per gram, optionally 0.93 cubic centimeters to 1.6 cubic centimeters per gram, optionally 0.96 cubic centimeters to 1.6 cubic centimeters per gram Centimeters, optionally 1 cubic centimeter per gram to 1.6 cubic centimeters per gram, optionally 1.1 cubic centimeters per gram to 1.6 cubic centimeters per gram, optionally 1.2 cubic centimeters per gram to 1.6 cubic centimeters per gram, optionally 1.3 cubic centimeters per gram to 1.6 cubic centimeters per gram, optionally 1.4 cubic centimeters per gram to 1.6 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.5 cubic centimeters, optionally 0.80 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 1 cubic centimeter per gram 1 cubic centimeter per gram, optionally 1.1 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 1.2 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 1.3 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 1.4 cubic centimeters per gram to 1.5 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 1 gram 0.80 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 1 cubic centimeter per gram to 1 gram 1.42 cubic centimeters, optionally 1.1 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 1.2 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 1.3 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 1.4 cubic centimeters per gram to 1.42 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 0.80 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.85 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.90 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.93 cubic centimeters to 1.38 cubic centimeters per gram, optionally 0.96 cubic centimeters to 1.38 cubic centimeters per gram, optionally 1 cubic centimeter to 1.38 cubic centimeters per gram Centimeters, optionally 1.1 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 1.2 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 1.3 cubic centimeters per gram to 1.38 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram - 1.37 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.37 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.3 cubic centimeters per gram, Optionally, 0.85 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally, 0.90 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally, 0.93 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally, 0.96 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally, 1 cubic centimeter per gram to 1.3 cubic centimeters per gram, optionally, 1.1 cubic centimeters per gram to 1.3 cubic centimeters, optionally 1.2 cubic centimeters per gram to 1.3 cubic centimeters per gram, optionally 0.75 cubic centimeters per gram to 1.23 cubic centimeters per gram, optionally 0.80 cubic centimeters per gram to 1.23 cubic centimeters per gram, optionally 0.85 cubic centimeters per gram to 1.23 cubic centimeters per gram, optionally 0.90 cubic centimeters per gram to 1.23 cubic centimeters per gram, optionally 0.93 cubic centimeters per gram An aerosol-generating article according to any one of Examples 1 to 3, having a volume of one or both of the following: 1.23 cubic centimeters per gram, optionally 0.96 cubic centimeters per gram to 1.23 cubic centimeters per gram, optionally 1 cubic centimeter per gram to 1.23 cubic centimeters per gram, optionally 1.1 cubic centimeters per gram to 1.23 cubic centimeters per gram, or optionally 1.2 cubic centimeters per gram to 1.23 cubic centimeters per gram. Example 5: The first wrapper has a thickness of 36 micrometers or more, optionally 40 micrometers or more, optionally 41 micrometers or more, optionally 45 micrometers or more, optionally 46 micrometers or more, optionally 50 micrometers or more, optionally 60 micrometers or more, optionally 70 micrometers or more, or optionally 80 micrometers or more, and An aerosol generating article according to any one of Examples 1 to 4, wherein the second wrapper has a thickness of 36 micrometers or more, optionally 40 micrometers or more, optionally 41 micrometers or more, optionally 45 micrometers or more, optionally 46 micrometers or more, optionally 50 micrometers or more, optionally 58 micrometers or more, optionally 60 micrometers or more, optionally 70 micrometers or more, or optionally 80 micrometers or more, or both of these. Example 6: The first wrapper has a thickness of 90 micrometers or less, optionally 80 micrometers or less, optionally 70 micrometers or less, optionally 60 micrometers or less, optionally 55 micrometers or less, optionally 50 micrometers or less, optionally 46 micrometers or less, optionally 45 micrometers or less, optionally 41 micrometers or less, or optionally 40 micrometers or less, and An aerosol generating article according to any one of Examples 1 to 5, wherein the second wrapper has a thickness of 90 micrometers or less, optionally 80 micrometers or less, optionally 72 micrometers or less, optionally 70 micrometers or less, optionally 65 micrometers or less, optionally 60 micrometers or less, optionally 55 micrometers or less, optionally 50 micrometers or less, optionally 46 micrometers or less, optionally 45 micrometers or less, optionally 41 micrometers or less, or optionally 40 micrometers or less, or both of the above. Example 7: The first wrapper is 36 micrometers to 90 micrometers, optionally 36 micrometers to 80 micrometers, optionally 36 micrometers to 70 micrometers, optionally 36 micrometers to 60 micrometers, optionally 36 micrometers to 55 micrometers, optionally 36 micrometers to 50 micrometers, optionally 36 micrometers to 46 micrometers, optionally 36 micrometers to 45 micrometers, optionally 36 micrometers to 41 micrometers, optionally 36 micrometers to 40 micrometers, optionally 40 to 90 micrometers, optionally 40 to 80 micrometers, optionally 40 to 70 micrometers, optionally 40 to 60 micrometers, optionally 40 to 55 micrometers, optionally 40 to 50 micrometers, optionally 40 to 46 micrometers, optionally 40 to 45 micrometers, optionally 40 to 41 micrometers, optionally 41 micrometers Meters to 90 micrometers, optionally 41 to 80 micrometers, optionally 41 to 70 micrometers, optionally 41 to 60 micrometers, optionally 41 to 55 micrometers, optionally 41 to 50 micrometers, optionally 41 to 46 micrometers, optionally 41 to 45 micrometers, optionally 45 to 90 micrometers, optionally 45 to 80 micrometers, optionally 4 5 micrometers to 70 micrometers, optionally 45 micrometers to 60 micrometers, optionally 45 micrometers to 55 micrometers, optionally 45 micrometers to 50 micrometers, optionally 45 micrometers to 46 micrometers, optionally 46 micrometers to 90 micrometers, optionally 46 micrometers to 80 micrometers, optionally 46 micrometers to 70 micrometers, optionally 46 micrometers to 60 micrometers, optionally 46 micrometers to 55 micrometers,Having a thickness of any choice between 46 micrometers and 50 micrometers, any choice between 50 micrometers and 90 micrometers, any choice between 50 micrometers and 80 micrometers, any choice between 50 micrometers and 70 micrometers, any choice between 50 micrometers and 60 micrometers, any choice between 50 micrometers and 55 micrometers, any choice between 60 micrometers and 90 micrometers, any choice between 60 micrometers and 80 micrometers, any choice between 60 micrometers and 70 micrometers, any choice between 70 micrometers and 90 micrometers, any choice between 70 micrometers and 80 micrometers, or any choice between 80 micrometers and 90 micrometers, and The second wrapper is 36 micrometers to 90 micrometers, optionally 36 micrometers to 80 micrometers, optionally 36 micrometers to 72 micrometers, optionally 36 micrometers to 70 micrometers, optionally 36 micrometers to 65 micrometers, optionally 36 micrometers to 60 micrometers, optionally 36 micrometers to 55 micrometers, optionally 36 micrometers to 50 micrometers, optionally 36 micrometers to 46 micrometers, optionally 36 micrometers to 45 micrometers, optionally 36-41 micrometers, optionally 36-40 micrometers, optionally 40-90 micrometers, optionally 40-80 micrometers, optionally 40-72 micrometers, optionally 40-60 micrometers, optionally 40-65 micrometers, optionally 40-60 micrometers, optionally 40-55 micrometers, optionally 40 micrometers meter to 50 micrometers, optionally 40 to 46 micrometers, optionally 40 to 45 micrometers, optionally 40 to 41 micrometers, optionally 41 to 90 micrometers, optionally 41 to 80 micrometers, optionally 41 to 72 micrometers, optionally 41 to 70 micrometers, optionally 41 to 65 micrometers, optionally 41 to 60 micrometers, optionally 4 1 micrometer to 55 micrometers, optionally 41 to 50 micrometers, optionally 41 to 46 micrometers, optionally 41 to 45 micrometers, optionally 45 to 90 micrometers, optionally 45 to 80 micrometers, optionally 45 to 72 micrometers, optionally 45 to 70 micrometers, optionally 45 to 65 micrometers, optionally 45 to 60 micrometers,Optionally 45-55 micrometers, optionally 45-50 micrometers, optionally 45-46 micrometers, optionally 46-90 micrometers, optionally 46-80 micrometers, optionally 46-72 micrometers, optionally 46-70 micrometers, optionally 46-65 micrometers, optionally 46-60 micrometers, optionally 46-55 micrometers, optionally 46-50 micrometers, optionally 50-90 micrometers, optionally 50-80 micrometers, optionally 50-72 micrometers, optionally 50-70 micrometers, optionally 50-65 micrometers, optionally 50-60 micrometers, An aerosol-generating article according to any one of Examples 1 to 6, having a thickness of any of the following: 50 to 55 micrometers, 58 to 90 micrometers, 58 to 80 micrometers, 58 to 72 micrometers, 58 to 70 micrometers, 58 to 65 micrometers, 58 to 60 micrometers, 60 to 90 micrometers, 60 to 80 micrometers, 60 to 72 micrometers, 60 to 70 micrometers, 70 to 90 micrometers, 70 to 80 micrometers, 70 to 72 micrometers, or 80 to 90 micrometers, or both. Example 8: The first wrapper has a basis weight of 33.5 grams or more per square meter, optionally 36.5 grams or more per square meter, optionally 38.5 grams or more per square meter, optionally 39.0 grams or more per square meter, optionally 50 grams or more per square meter, or optionally 60 grams or more per square meter, and The aerosol generating article according to any one of Examples 1 to 7, wherein the second wrapper has a basis weight of 33.5 grams or more per square meter, optionally 36.5 grams or more per square meter, optionally 38.5 grams or more per square meter, optionally 39.0 grams or more per square meter, optionally 42 grams or more per square meter, optionally 43 grams or more per square meter, optionally 50 grams or more per square meter, or optionally 60 grams or more per square meter. Example 9: The first wrapper has a basis weight of 70 grams or less per square meter, optionally 60 grams or less per square meter, optionally 50 grams or less per square meter, optionally 42 grams or less per square meter, optionally 41.5 grams or less per square meter, optionally 38.5 grams or less per square meter, or optionally 36.5 grams or less per square meter, and The aerosol generating article according to any one of Examples 1 to 8, wherein the second wrapper has a basis weight of 70 grams or less per square meter, optionally 60 grams or less per square meter, optionally 50 grams or less per square meter, optionally 47 grams or less per square meter, optionally 43 grams or less per square meter, optionally 42 grams or less per square meter, optionally 41.5 grams or less per square meter, optionally 38.5 grams or less per square meter, or optionally 36.5 grams or less per square meter. Example 10: The first wrapper contains 33.5 grams to 70 grams per square meter, optionally 33.5 grams to 60 grams per square meter, optionally 33.5 grams to 50 grams per square meter, optionally 33.5 grams to 42 grams per square meter, optionally 33.5 grams to 41.5 grams per square meter, optionally 33.5 grams to 38.5 grams per square meter, and optionally per square meter 33.5 grams to 36.5 grams per square meter, optionally 36.5 grams to 70 grams per square meter, optionally 36.5 grams to 60 grams per square meter, optionally 36.5 grams to 50 grams per square meter, optionally 36.5 grams to 42 grams per square meter, optionally 36.5 grams to 41.5 grams per square meter, optionally 36.5 grams per square meter 38.5 grams, optionally 38.5 grams to 70 grams per square meter, optionally 38.5 grams to 60 grams per square meter, optionally 38.5 grams to 50 grams per square meter, optionally 38.5 grams to 42 grams per square meter, optionally 38.5 grams to 41.5 grams per square meter, optionally 39 grams to 70 grams per square meter, optionally 3 Having a basis weight of 9 grams to 60 grams per square meter, optionally 39 grams to 50 grams per square meter, optionally 39 grams to 42 grams per square meter, optionally 39 grams to 41.5 grams per square meter, optionally 50 grams to 70 grams per square meter, optionally 50 grams to 60 grams per square meter, or optionally 60 grams to 70 grams per square meter, and The second wrapper is 33.5 grams to 70 grams per square meter, optionally 33.5 grams to 60 grams per square meter, optionally 33.5 grams to 50 grams per square meter, optionally 33.5 grams to 47 grams per square meter, optionally 33.5 grams to 43 grams per square meter, and optionally 33.5 grams to 42 grams per square meter. , optionally 33.5 grams to 41.5 grams per square meter, optionally 33.5 grams to 38.5 grams per square meter, optionally 33.5 grams to 36.5 grams per square meter, optionally 36.5 grams to 70 grams per square meter, optionally 36.5 grams to 60 grams per square meter, optionally 36.5 grams to 50 grams per square meter grams, optionally 36.5 grams to 47 grams per square meter, optionally 36.5 grams to 43 grams per square meter, optionally 36.5 grams to 42 grams per square meter, optionally 36.5 grams to 41.5 grams per square meter, optionally 36.5 grams to 38.5 grams per square meter, optionally 38.5 grams per square meter to per square meter 70 grams, optionally 38.5 grams to 60 grams per square meter, optionally 38.5 grams to 50 grams per square meter, optionally 38.5 grams to 47 grams per square meter, optionally 38.5 grams to 43 grams per square meter, optionally 38.5 grams to 42 grams per square meter, optionally 38.5 grams to 41 grams per square meter.5 grams, optionally 39 grams to 70 grams per square meter, optionally 39 grams to 60 grams per square meter, optionally 39 grams to 50 grams per square meter, optionally 39 grams to 47 grams per square meter, optionally 39 grams to 43 grams per square meter, optionally 39 grams to 42 grams per square meter, optionally 39 grams to 41.5 grams per square meter, optionally 42 grams to 70 grams per square meter, optionally 42 grams to 60 grams per square meter, optionally 42 grams to 50 grams per square meter, optionally 1 An aerosol-generating article according to any one of Examples 1 to 9, having a basis weight of 42 grams to 47 grams per square meter, optionally 42 grams to 43 grams per square meter, optionally 43 grams to 70 grams per square meter, optionally 43 grams to 60 grams per square meter, optionally 43 grams to 50 grams per square meter, optionally 43 grams to 47 grams per square meter, optionally 50 grams to 70 grams per square meter, optionally 50 grams to 60 grams per square meter, or optionally 60 grams to 70 grams per square meter, or both of these. Example 11: An aerosol-generating article according to any of Examples 1 to 10, wherein each of the first wrapper and the second wrapper forms at least a portion of the outer surface of the article. Example 12: An aerosol generating article according to any one of Examples 1 to 11, wherein the first wrapper has a first wrapper length, the second wrapper has a second wrapper length, the aerosol forming section has an aerosol forming section length, and the aerosol generating article has an article length. Example 13: The aerosol-generating article according to Example 12, wherein one or both of the first wrapper length and the second wrapper length are shorter than the article length. Example 14: The aerosol-generating article according to Example 12 or Example 13, wherein the length of the first wrapper is greater than or equal to the length of the second wrapper, optionally the length of the first wrapper is substantially equal to the length of the aerosol-forming section, and optionally the first wrapper surrounds the aerosol-forming section along its entire length. Example 15: The first wrapper length is 30 percent or more of the article length, optionally 40 percent or more of the article length, optionally 50 percent or more of the article length, optionally 60 percent or more of the article length, optionally 70 percent or more of the article length, optionally 80 percent or more of the article length, or optionally 90 percent or more of the article length, An aerosol-generating article according to any one of Examples 12 to 14, wherein the second wrapper length is either 30 percent or more of the article length, optionally 40 percent or more of the article length, optionally 50 percent or more of the article length, optionally 60 percent or more of the article length, optionally 70 percent or more of the article length, optionally 80 percent or more of the article length, or optionally 90 percent or more of the article length. Example 16: The first wrapper length is 95 percent or less of the article length, optionally 90 percent or less of the article length, optionally 80 percent or less of the article length, optionally 70 percent or less of the article length, optionally 60 percent or less of the article length, optionally 50 percent or less of the article length, or optionally 40 percent or less of the article length, An aerosol-generating article according to any one of Examples 12 to 15, wherein the second wrapper length is either 95 percent or less of the article length, optionally 90 percent or less of the article length, optionally 80 percent or less of the article length, optionally 70 percent or less of the article length, optionally 60 percent or less of the article length, optionally 50 percent or less of the article length, or optionally 40 percent or less of the article length. Example 17: The first wrapper length is 30-95 percent of the article length, optionally 30-90 percent, optionally 30-80 percent, optionally 30-70 percent, optionally 30-60 percent, optionally 30-50 percent, optionally 30-40 percent, optionally 40-95 percent, optionally 40-90 percent, optionally 40-80 percent, optionally 40-70 percent, optionally 40-60 percent, optionally 40-50 percent, and optionally 50-95 percent. , optionally 50 to 90 percent of the article length, optionally 50 to 80 percent of the article length, optionally 50 to 70 percent of the article length, optionally 50 to 60 percent of the article length, optionally 60 to 95 percent of the article length, optionally 60 to 90 percent of the article length, optionally 60 to 80 percent of the article length, optionally 60 to 70 percent of the article length, optionally 70 to 95 percent of the article length, optionally 70 to 90 percent of the article length, optionally 70 to 80 percent of the article length, optionally 80 to 95 percent of the article length, optionally 80 to 90 percent of the article length, or optionally 90 to 95 percent of the article length, and The second wrapper length is 30-95 percent of the article length, optionally 30-90 percent of the article length, optionally 30-80 percent of the article length, optionally 30-70 percent of the article length, optionally 30-60 percent of the article length, optionally 30-50 percent of the article length, optionally 30-40 percent of the article length, optionally 40-95 percent of the article length, optionally 40-90 percent of the article length, optionally 40-80 percent of the article length, optionally 40-70 percent of the article length, optionally 40-60 percent of the article length, optionally 40-50 percent of the article length, optionally 50-95 percent of the article length, optionally 50-90 percent of the article length. An aerosol-generating article according to any one of Examples 12 to 16, wherein the length of the article is either 50 to 80 percent, 50 to 70 percent, 50 to 60 percent, 60 to 95 percent, 60 to 90 percent, 60 to 80 percent, 60 to 70 percent, 70 to 95 percent, 70 to 90 percent, 70 to 80 percent, 80 to 95 percent, 80 to 90 percent, or 90 to 95 percent. Example 18: An aerosol-generating article according to any of Examples 1 to 17, wherein one or both of the first wrapper and the second wrapper extend from the upstream end of the article. Example 19: A second wrapper extends from the downstream end of the article, an aerosol-generating article according to any of Examples 1 to 18. Example 20: An aerosol-generating article according to any of Examples 1 to 19, wherein a first wrapper extends from the upstream end of the article and a second wrapper extends from the downstream end of the article. Example 21: An aerosol-generating article according to any of Examples 1 to 20, wherein the downstream end of the second wrapper is located downstream of the downstream end of the first wrapper. Example 22: An aerosol-generating article according to any of Examples 1 to 21, wherein the upstream end of the first wrapper is located upstream of the upstream end of the second wrapper. Example 23: An aerosol-generating article according to any of Examples 1 to 22, wherein one or both of the first wrapper and the second wrapper optionally contain a cellulosic material selected from one or more of paper, wood, textiles, natural fibers, and artificial fibers. Example 24: An aerosol-generating article according to any of Examples 1 to 23, wherein one or both of the first and second wrappers include a water-resistant barrier coating on at least a portion of their inner surface, and optionally the water-resistant barrier coating includes one or both of alkyl ketene dimer (AKD) and rosin. Example 25: An aerosol-generating article according to any of Examples 1 to 24, wherein the basis weight of the second wrapper is greater than the basis weight of the first wrapper. Example 26: An aerosol-generating article according to any of Examples 1 to 25, wherein the thickness of the second wrapper is greater than the thickness of the first wrapper. Example 27: An aerosol-generating article according to any of Examples 1 to 26, wherein one or both of the first and second wrappers have an element printed on at least one of the inner or outer surfaces of the wrapper, optionally, only one of the first and second wrappers has an element printed on at least one of the inner or outer surfaces of the wrapper, optionally, only the second wrapper has an element printed on at least one of the inner or outer surfaces of the wrapper, and optionally, the printed element includes at least one of a mark, text, image, character, phrase, shape, logo, color, graphic, pattern, covering, or a combination thereof. Example 28: An aerosol generating article according to any of Examples 1 to 27, wherein one or both of the first wrapper and the second wrapper contain a filler, optionally, the filler content of one or both of the first wrapper and the second wrapper is 30 weight percent or less of the wrapper, and optionally, the filler is calcium carbonate. Example 29: An aerosol generating article according to any of Examples 1 to 28, wherein the surfaces of the first wrapper and the second wrapper each have a wire side and a non-wire side opposite the wire side, and optionally the non-wire side faces outward. Example 30: The non-wire side of the first wrapper has a contact angle greater than or equal to the contact angle of the non-wire side of the second wrapper, and The aerosol-generating article according to Example 29, wherein the wire side of the first wrapper has a contact angle greater than or equal to the contact angle of the wire side of the second wrapper, or both of these. Example 31: At least one of the non-wire side and wire side of the first wrapper has a contact angle of 45 degrees or more, optionally 50 degrees or more, optionally 60 degrees or more, optionally 65 degrees or more, or optionally 73 degrees or more, and The aerosol generating article according to Example 29 or Example 30, wherein at least one of the non-wire side and wire side of the second wrapper has one or both of the following contact angles: 45 degrees or more, optionally 50 degrees or more, optionally 60 degrees or more, optionally 65 degrees or more, or optionally 73 degrees or more. Example 32: At least one of the non-wire side and wire side of the first wrapper has a contact angle of 73 degrees or less, optionally 65 degrees or less, or optionally 60 degrees or less, and The aerosol generating article according to any one of Examples 29 to 31, wherein at least one of the non-wire side and wire side of the second wrapper has a contact angle of 73 degrees or less, optionally 65 degrees or less, or optionally 60 degrees or less, or both. Example 33: At least one of the non-wire side and wire side of the first wrapper has a contact angle of 45 to 75 degrees, optionally 45 to 65 degrees, optionally 45 to 60 degrees, optionally 50 to 73 degrees, optionally 50 to 65 degrees, optionally 50 to 60 degrees, optionally 60 to 73 degrees, optionally 60 to 65 degrees, or optionally 65 to 73 degrees, and The aerosol generating article according to any one of Examples 29 to 32, wherein at least one of the non-wire side and wire side of the second wrapper has one or both of the following contact angles: 45 to 75 degrees, optionally 45 to 65 degrees, optionally 45 to 60 degrees, optionally 50 to 73 degrees, optionally 50 to 65 degrees, optionally 50 to 60 degrees, optionally 60 to 73 degrees, optionally 60 to 65 degrees, or optionally 65 to 73 degrees. Example 34: An aerosol generating article according to any of Examples 1 to 33, wherein the first wrapper and the second wrapper overlap each other, and the second wrapper is optionally placed on top of the first wrapper. Example 35: The aerosol generating article according to Example 34, wherein the overlapping length of the first wrapper and the second wrapper in a direction parallel to the long axis of the article is equal to the length of one or more of the hollow tubular elements. Example 36: An aerosol-generating article according to Example 34 or Example 35, wherein the overlapping length of the first wrapper and the second wrapper in a direction parallel to the long axis of the article is 5 millimeters or more, optionally 10 millimeters or more, optionally 15 millimeters or more, or optionally 20 millimeters or more. Example 37: An aerosol generating article according to any one of Examples 34 to 36, wherein the overlapping length of the first wrapper and the second wrapper in a direction parallel to the long axis of the article is 25 millimeters or less, optionally 20 millimeters or less, optionally 15 millimeters or less, or optionally 10 millimeters or less. Example 38: An aerosol generating article according to any one of Examples 1 to 37, wherein the aerosol generating article comprises a downstream section, and the downstream section comprises an intermediate section and a mouthpiece element. Example 39: The aerosol generating article according to Example 38, wherein the downstream section extends between the rod of the aerosol generating substrate and the downstream end of the aerosol generating article. Example 40: The aerosol generating article according to Example 38 or Example 39, wherein the downstream section has a length of 10 mm or more, optionally 20 mm or more, optionally 25 mm or more, optionally 30 mm or more, or optionally 40 mm or more. Example 41: An aerosol generating article according to any one of Examples 38 to 40, wherein the downstream section has a length of 70 mm or less, optionally 60 mm or less, optionally 50 mm or less, optionally 40 mm or less, optionally 30 mm or less, optionally 25 mm or less, or optionally 20 mm or less. Example 42: The downstream section can be 10mm to 70mm, optionally 10mm to 60mm, optionally 10mm to 50mm, optionally 10mm to 40mm, optionally 10mm to 30mm, optionally 10mm to 25mm, optionally 10mm to 20mm, optionally 20mm to 70mm, optionally 20mm to 60mm, optionally 20mm to 50mm, optionally 20mm to 40mm, optionally 20mm to 30mm, optionally 20mm to 25mm, or optionally 25mm. An aerosol generating article according to any one of Examples 38 to 41, having a length of 3 to 70 mm, optionally 25 to 60 mm, optionally 25 to 50 mm, optionally 25 to 40 mm, optionally 25 to 30 mm, optionally 30 to 70 mm, optionally 30 to 60 mm, optionally 30 to 50 mm, optionally 30 to 40 mm, optionally 40 to 70 mm, optionally 40 to 60 mm, or optionally 40 to 50 mm. Example 43: An aerosol generating article according to any one of Examples 1 to 42, wherein the intermediate section abuts against the downstream end of the rod of the aerosol generating substrate, and optionally, one or more hollow tubular elements of the intermediate section abuts against the downstream end of the rod of the aerosol generating substrate. Example 44: An aerosol generating article according to any one of Examples 1 to 43, wherein at least one of the one or more hollow tubular elements is formed from at least one of cardboard, paper, polymer material, cellulosic material, cellulose acetate, low-density polyethylene (LDPE), and polyhydroxyalkanoate (PHA). Example 45: An aerosol generating article according to any one of Examples 1 to 44, wherein one or more hollow tubular elements comprise hollow tubular cooling elements, optionally the upstream end of the hollow tubular cooling element abuts against the downstream end of the rod of the aerosol generating substrate, optionally the hollow tubular cooling element is a cardboard tube, and optionally the hollow tubular cooling element is a flanged cardboard tube. Example 46: An aerosol generating article according to any one of Examples 1 to 45, wherein one or more hollow tubular elements are provided with hollow tubular support elements, and optionally the upstream end of the hollow tubular support element abuts against the downstream end of the rod of the aerosol generating substrate. Example 47: The aerosol generating article according to Example 46, wherein the hollow tubular support element is formed from one or more materials selected from the group consisting of cellulose acetate, cardboard, crimped paper such as crimped heat-resistant paper or crimped sulfuric acid paper, and polymer materials such as low-density polyethylene (LDPE). Example 48: An aerosol generating article according to any one of Examples 1 to 47, wherein one or more hollow tubular elements are provided with a hollow tubular support element upstream of a hollow tubular cooling element, and optionally the upstream end of the hollow tubular cooling element abuts against the downstream end of the hollow tubular support element. Example 49: An aerosol generating article according to any one of Examples 1 to 48, wherein the intermediate section further comprises a PLA (polylactic acid) plug, optionally the PLA plug comprises crimped PLA, and optionally the PLA plug is downstream of one or more hollow tubular elements. Example 50: The aerosol generating article according to Example 49, wherein one or more hollow tubular elements are provided with a hollow tubular support element upstream of a PLA plug, and optionally the upstream end of the PLA plug abuts against the downstream end of the hollow tubular support element. Example 51: An aerosol generating article according to any one of Examples 1 to 50, wherein one or more hollow tubular elements comprise a first hollow tubular element and a second hollow tubular element, optionally the second hollow tubular element is disposed downstream of the first hollow tubular element, optionally the inner diameter of the second hollow tubular element is larger than the inner diameter of the first hollow tubular element, optionally the wall thickness of the second hollow tubular element is smaller than the wall thickness of the first hollow tubular element, optionally the first hollow tubular element comprises a hollow acetate tube (HAT), and optionally the second hollow tubular element comprises a fine hollow acetate tube (FHAT). Example 52: An aerosol generating article according to any of Examples 1 to 51, wherein the mouthpiece element is located immediately downstream of the intermediate section, and optionally, the mouthpiece element is located immediately downstream of one or more hollow tubular elements. Example 53: An aerosol generating article according to any of Examples 1 to 52, wherein the mouthpiece element is located at the downstream end of the aerosol generating article. Example 54: An aerosol generating article according to any of Examples 1 to 53, wherein the mouthpiece element is formed of a fibrous filter material, and optionally, the mouthpiece element is formed of cellulose acetate. Example 55: An aerosol generating article according to any one of Examples 1 to 54, wherein the aerosol generating article comprises a flavor capsule. Example 56: An aerosol generating article as described in Example 55, wherein the flavor capsule is located within the mouthpiece element and the flavor capsule is easily broken at will. Example 57: An aerosol generating article according to any one of Examples 1 to 56, wherein the rod of the aerosol generating substrate contains at least one of nicotine, one or more aerosol forming bodies, and one or more carboxylic acids. Example 58: An aerosol generating article according to any one of Examples 1 to 57, wherein the rod of the aerosol generating substrate contains homogenized tobacco material, optionally the aerosol generating substrate contains an aggregate of sheets of homogenized tobacco material, and optionally the homogenized tobacco material is a cast sheet. Example 59: An aerosol generating article according to any one of Examples 1 to 58, wherein the rod of the aerosol generating substrate includes a susceptor element disposed within the rod of the aerosol generating substrate. Example 60: An aerosol-generating article according to any of Examples 1 to 59, wherein the article length is 30 mm to 80 mm, optionally 35 mm to 70 mm, optionally 40 mm to 60 mm, optionally 45 mm to 60 mm, optionally 40 mm to 50 mm, optionally 45 mm to 50 mm, or optionally about 45 mm. Example 61: An aerosol generating article according to any one of Examples 1 to 60, wherein the aerosol generating article is equipped with a ventilation zone. Example 62: The aerosol generating article according to Example 61, wherein the ventilation zone comprises one or more vents, and optionally, one or more vents are arranged in one or more rows circumferentially around the article. Example 63: The aerosol generating article according to Example 62, wherein one or more vents are provided through at least one of one or more hollow tubular elements. Example 64: The aerosol-generating article according to Example 62 or Example 63, wherein one or more vents are provided through one or both of the first wrapper and the second wrapper. Example 65: An aerosol generating article according to any of Examples 1 to 64, wherein the aerosol generating article has an article length, the cross-sectional shape of the article is substantially constant over the article length, optionally the cross-sectional shape of the article is substantially circular, optionally the article has a width perpendicular to the article length, and the width is substantially constant along the entire article length. Example 66: The aerosol generating article according to any one of Examples 1 to 65, wherein the aerosol forming section further comprises an upstream section located upstream of the rod of the aerosol generating substrate, and optionally the upstream section extends between the upstream end of the aerosol generating article and the rod of the aerosol generating substrate. Example 67: The aerosol generating article according to Example 66, wherein the upstream section comprises one or more upstream elements, and optionally, one or more upstream elements comprises one or both of a hollow tubular segment and a solid cylindrical plug element having a filled cross section. Example 68: An aerosol-generating article according to any of Examples 1 to 67, wherein the second wrapper surrounds the mouthpiece element along the entire length of the mouthpiece element. Example 69: An aerosol-generating article according to any one of Examples 1 to 68, wherein the second wrapper surrounds at least a portion of the aerosol-forming section. Example 70: an aerosol generation system, an aerosol generating article described in any one of Examples 1 to 69, An aerosol generating system comprising an aerosol generating device configured to heat an aerosol generating article. Example 71: The aerosol generating system according to Example 70, wherein the aerosol generating device comprises a device cavity configured to receive at least a portion of the aerosol generating article. Example 72: The aerosol generating system according to Example 71, wherein the device cavity has a closed end and an open end, an aerosol generating article can optionally be inserted into the device cavity through the open end, and the device cavity optionally has substantially the same cross-sectional shape as the aerosol generating article. Example 73: An aerosol generating system according to any one of Examples 70 to 72, wherein the aerosol generating device is equipped with a heating element, and optionally the heating element is one of a resistance heating element and a susceptor element. Example 74: An aerosol generating system according to any one of Examples 70 to 73, wherein the aerosol generating device comprises an inductor coil, optionally, the inductor coil is arranged to at least partially enclose a device cavity, and optionally, the inductor coil is arranged to coaxially enclose the device cavity. Example 75: The aerosol generating system according to any one of Examples 70 to 74, wherein the aerosol generating device comprises a heating element in the form of a pin or blade configured for inserting an aerosol generating article into a rod of an aerosol generating substrate, and optionally the pin or blade comprises one of a resistance heating element and a susceptor element. Example 76: The aerosol generating system according to Example 75, wherein when an aerosol generating article is received by the aerosol generating device, a pin or blade penetrates the rod of the aerosol generating substrate through the center of the cross-sectional surface of the rod which is substantially perpendicular to the length of the rod. Example 77: An aerosol generating system according to Example 74 and either Example 75 or Example 76, wherein the pin or blade includes a susceptor element and an inductor coil is arranged to inductively heat the pin or blade. Example 78: An aerosol generating system according to Example 74 and any one of Examples 70 to 77, wherein the aerosol generating article comprises a susceptor element disposed within a rod of an aerosol generating substrate, and the inductor coil of the aerosol generating device is arranged to inductively heat the susceptor element. Example 79: An aerosol generating system according to any one of Examples 70 to 78, wherein the heating element is located around the periphery of the device cavity, optionally the heating element surrounds the aerosol generating article when the aerosol generating article is at least partially received within the device cavity, optionally the heating element comprises a susceptor element, and optionally the inductor coil of the aerosol generating device is arranged to inductively heat the susceptor element.

Claims

1. an aerosol generating article, wherein the aerosol generating article is Aerosol-forming section, Rods of aerosol generating substrates, and An aerosol forming section comprising an intermediate section located downstream of the rod of the aerosol generating substrate, which includes one or more hollow tubular elements, A mouthpiece element located downstream of the aerosol forming section, At least two rappers, A first wrapper that surrounds only the aerosol-forming section, having a volume of 1.42 cubic centimeters or less per gram, The mouthpiece element comprises at least two wrappers, including a second wrapper that surrounds at least a portion of the mouthpiece element, Each of the first wrapper and the second wrapper forms at least a portion of the outer surface of the aerosol generating article. An aerosol-generating article in which the first wrapper is in direct physical contact with the intermediate section.

2. The aerosol generating article according to claim 1, wherein the first wrapper has a volume of 0.75 cubic centimeters or more per gram.

3. The aerosol generating article according to claim 1 or 2, wherein the first wrapper has a thickness of 36 micrometers or more.

4. The aerosol generating article according to any one of claims 1 to 3, wherein the first wrapper has a thickness of 90 micrometers or less.

5. The aerosol generating article according to any one of claims 1 to 4, wherein the first wrapper has a basis weight of 33.5 grams or more per square meter.

6. The aerosol generating article according to any one of claims 1 to 5, wherein the first wrapper has a basis weight of 70 grams or less per square meter.

7. The aerosol generating article according to any one of claims 1 to 6, wherein the second wrapper has a second wrapper length, the aerosol generating article has an article length, and the second wrapper length is shorter than the article length.

8. The aerosol generating article according to any one of claims 1 to 7, wherein the first wrapper has a first wrapper length, the second wrapper has a second wrapper length, and the first wrapper length is longer than the second wrapper length.

9. The aerosol generating article according to any one of claims 1 to 8, wherein the first wrapper extends from the upstream end of the article.

10. The aerosol generating article according to any one of claims 1 to 9, wherein the second wrapper extends from the downstream end of the article.

11. The aerosol generating article according to any one of claims 1 to 10, wherein at least one of the first wrapper and the second wrapper optionally comprises a cellulosic material selected from one or more of paper, wood, textiles, natural fibers, and artificial fibers.

12. The aerosol generating article according to any one of claims 1 to 11, wherein one or both of the first wrapper and the second wrapper each have a permeability of 10 cholesterol units or less.

13. The aerosol generating article according to any one of claims 1 to 12, wherein the second wrapper comprises elements printed on the surface of the second wrapper.

14. an aerosol generation system, an aerosol generating article according to any one of claims 1 to 13, An aerosol generating system comprising an aerosol generating device configured to heat the aerosol generating article.

Images