KR20240034231A - Aerosol-generating article comprising a wrapper with a metal layer - Google Patents

Abstract

Aerosol-generating article 100 includes an aerosol-forming substrate comprising one or more aerosol-forming agents; and wrapper 70. A wrapper 70 is wrapped around the plug of aerosol-forming substrate. Wrapper 70 includes a metal layer. The aerosol-forming substrate has an aerosol former content of at least 40% by weight.

Description

Aerosol-generating article comprising a wrapper with a metal layer

The present invention relates to an aerosol-generating article comprising a wrapper with a metal layer.

Aerosol-generating systems for delivering an aerosol to a user typically include an aerosol-generating article and a nebulizer. Aerosol-generating articles include aerosol-forming substrates. The nebulizer is configured to generate an inhalable aerosol from an aerosol-forming substrate. Some known aerosol generating systems include thermal nebulizers such as electric heaters or induction heating devices. Thermal nebulizers are configured to heat and vaporize an aerosol-forming substrate to generate an aerosol, which can be inhaled by a user. A typical aerosol-forming substrate for use in an aerosol-generating system is a nicotine formulation, which may be a liquid nicotine formulation containing an aerosol former such as glycerin.

It would be desirable to provide an aerosol-generating article that provides improved nicotine delivery.

Aerosol-generating articles are provided. Aerosol-generating articles can include an aerosol-forming substrate. The aerosol-forming substrate may include one or more aerosol-forming agents. The aerosol-generating article may include a wrapper. A wrapper may be wrapped around a plug of aerosol-forming substrate. The wrapper may include a metal layer. The aerosol-forming substrate can have an aerosol former content of at least 40% by weight.

Additionally, an aerosol-forming substrate comprising one or more aerosol-forming agents; and an aerosol-generating article comprising a wrapper, wherein the wrapper is wrapped around an aerosol-forming substrate, the wrapper comprising a metal layer, and the aerosol-forming substrate having an aerosol former content of at least 40% by weight.

An aerosol generating system is also provided. An aerosol-generating system can include an aerosol-generating article. Aerosol-generating articles can include an aerosol-forming substrate. The aerosol-forming substrate may include one or more aerosol-forming agents. The aerosol-generating article may include a wrapper. A wrapper may be wrapped around a plug of aerosol-forming substrate. The wrapper may include a metal layer. The aerosol-forming substrate can have an aerosol former content of at least 40% by weight.

Also provided is an aerosol-generating system comprising an aerosol-generating article, the aerosol-generating article comprising: an aerosol-forming substrate comprising one or more aerosol-forming agents; and a wrapper, wherein the wrapper is wrapped around the aerosol-forming substrate, the wrapper comprising a metal layer, and the aerosol-forming substrate has an aerosol former content of at least 40% by weight.

Providing a wrapper comprising a metal layer and wrapped around the aerosol-forming substrate provides better nicotine delivery when the aerosol-forming substrate contains a large amount of aerosol former.

The inventors believe that the metal layer can form a barrier between the surface(s) of the aerosol-forming substrate and other components of the aerosol-generating article. Such a barrier can reduce migration of one or more components of the aerosol-forming substrate, such as an aerosol-forming agent, out of the aerosol-forming substrate and into other components of the aerosol-generating article.

An increase in the amount of nicotine delivered from the aerosol-forming substrate may be caused by the barrier to reduce migration of one or more components of the aerosol-forming substrate out of the aerosol-forming substrate.

As used herein, the term “aerosol-generating article” refers to an article for generating an aerosol. Aerosol-generating articles typically include a suitable aerosol-forming substrate and are intended to be heated or burned to release volatile compounds capable of forming an aerosol. Conventional cigarettes light when the user applies a flame to one end of the cigarette and draws air through the other end. The local heat provided by the flame and the oxygen in the air drawn through the cigarette cause the end of the cigarette to ignite, and the resulting combustion produces inhalable smoke. In contrast, in a “heated aerosol-generating article” the aerosol is generated by heating the aerosol-forming substrate and not by burning the aerosol-forming substrate. Known heated aerosol-generating articles include, for example, electrically heated aerosol-generating articles.

As used herein, the term “aerosol-forming substrate” refers to a substrate that is capable of generating volatile compounds upon heating, which are capable of forming an aerosol. Aerosols generated from aerosol-forming substrates are visible to the naked eye and may include vapors (e.g., particulates of substances in the gaseous state, which are usually liquid or solid at room temperature), as well as droplets of gases and condensed vapors. there is.

As used herein in connection with the present invention, the term “susceptor element” refers to a material capable of converting electromagnetic energy into heat. Eddy currents induced within the susceptor element heat the susceptor element when placed in a fluctuating electromagnetic field. When the susceptor element is placed in thermal contact with the aerosol-forming substrate, the aerosol-forming substrate is heated by the susceptor element.

The wrapper may include a metal layer.

The wrapper may include a paper layer.

As used herein in connection with the present invention, the term “paper layer” is used to describe a layer formed from cellulose fibers.

The paper layer may be a non-metallic layer. That is, the paper layer is not a metal layer or alloy layer.

The metal layer may be radially inside the paper layer.

Alternatively, the metal layer may be radially outside the paper layer.

The wrapper may include a metal layer deposited on the paper layer. The metal layer can be formed by physical vapor deposition. Advantageously, depositing a metal layer on the paper layer can thin the wrapper. If the aerosol-generating article includes a susceptor, a thin wrapper may result in less interaction with magnetic fields and may not significantly alter the electromagnetic properties of the aerosol-generating article. Additionally, using thinner metal layers can reduce the amount of metal needed to form the metal layer, which can improve sustainability.

The wrapper may include a laminate of metal layers secured to a paper layer. The metal layer can be formed by lamination. Advantageously, the use of lamination can provide a wrapper that is easier to manufacture. Additionally, lamination can result in a more homogeneous layer. Additionally, lamination may be a better option than deposition for externally heated aerosol-generating articles due to the better thermal conductivity of thicker layers, which increases heat conduction.

The wrapper may be wrapped around at least 50% of the total length of the aerosol-forming substrate. The wrapper may be wrapped around at least 80% of the total length of the aerosol-forming substrate. The wrapper may be wrapped around at least 90% of the total length of the aerosol-forming substrate. The wrapper may be wrapped around at least 95% of the total length of the aerosol-forming substrate.

The aerosol-generating article may include a plug containing an aerosol-forming substrate. The plug may be formed from a porous material. The wrapper may be wrapped around the plug.

An aerosol-generating article can include a rod of an aerosol-forming substrate. The wrapper may be wrapped around the rod.

If the metal layer is too thin, it may not be possible to manufacture the metal layer and the metal layer may have less anti-capillary properties. However, if the metal layer is too thick, there may be more interaction with the magnetic field when the aerosol-generating article is inductively heated, and the metal layer may be more expensive to manufacture.

The metal layer can have a thickness of 2 nm or more. The metal layer may have a thickness of 5 nm or more. The metal layer may have a thickness of 10 nm or more. The metal layer may have a thickness of 15 nm or more. The metal layer can have a thickness of 20 nm or more. The metal layer can have a thickness of 25 nm or more. The metal layer can have a thickness of 30 nm or more. The metal layer can have a thickness of 40 nm or more. The metal layer may have a thickness of 50 nm or more.

The metal layer may have a thickness of less than 6000 nm. The metal layer may have a thickness of less than 4000 nm. The metal layer may have a thickness of less than 2000 nm. The metal layer may have a thickness of less than 1000 nm. The metal layer may have a thickness of less than 500 nm. The metal layer may have a thickness of less than 200 nm. The metal layer may have a thickness of less than 100 nm. The metal layer may have a thickness of less than 90 nm. The metal layer may have a thickness of less than 80 nm. The metal layer may have a thickness of less than 70 nm. The metal layer may have a thickness of less than 60 nm. The metal layer may have a thickness of less than 50 nm.

The metal layer can have a thickness of 2 nm to 100 nm. The metal layer can have a thickness of 2 nm to 90 nm. The metal layer may have a thickness of 2 nm to 80 nm. The metal layer can have a thickness of 2 nm to 70 nm. The metal layer can have a thickness of 2 nm to 60 nm. The metal layer can have a thickness of 2 nm to 50 nm.

The metal layer may have a thickness of 5 nm to 100 nm. The metal layer may have a thickness of 10 nm to 100 nm. The metal layer may have a thickness of 15 nm to 100 nm. The metal layer can have a thickness of 20 nm to 100 nm. The metal layer may have a thickness of 25 nm to 100 nm. The metal layer may have a thickness of 30 nm to 100 nm. The metal layer may have a thickness of 40 nm to 100 nm. The metal layer may have a thickness of 50 nm to 100 nm.

The metal layer may have a thickness of 5 nm to 90 nm. The metal layer may have a thickness of 5 nm to 80 nm. The metal layer may have a thickness of 10 nm to 80 nm. The metal layer may have a thickness of 10 nm to 70 nm. The metal layer may have a thickness of 10 nm to 60 nm. The metal layer may have a thickness of 15 nm to 60 nm. The metal layer may have a thickness of 15 nm to 50 nm. The metal layer may have a thickness of 20 nm to 50 nm. The metal layer may have a thickness of 20 nm to 40 nm. The metal layer may have a thickness of 25 nm to 40 nm. The metal layer may have a thickness of 25 nm to 30 nm.

The metal layer may include one or more of the following metals: aluminum, chromium, copper, gold, nickel, silver, and tin. The metal layer can be formed from an aluminum layer. The metal layer may include an aluminum layer. Advantageously, aluminum has a relatively low boiling point, which may make it easier to form the metal layer, especially when using vapor deposition. Additionally, aluminum has a lower cost when compared to other metals.

If the paper layer is too thin, the paper layer may not provide sufficient resistance to tearing. If the paper layer is too thick, the wrapper may be too difficult to roll during manufacturing, which may reduce the manufacturing speed of the aerosol-generating article.

The paper layer may have a thickness of 10 μm or more. The paper layer can have a thickness of 20 μm or more. The paper layer can have a thickness of 40 μm or more.

The paper layer may have a thickness of less than 120 μm. The paper layer may have a thickness of less than 100 μm. The paper layer may have a thickness of less than 80 μm.

The paper layer can have a thickness of about 10 μm to about 120 μm. The paper layer can have a thickness of about 10 μm to about 100 μm. The paper layer can have a thickness of about 10 μm to about 80 μm.

The paper layer can have a thickness of about 20 μm to about 120 μm. The paper layer can have a thickness of about 20 μm to about 100 μm. The paper layer may have a thickness of 20 μm to 80 μm.

The paper layer may have a thickness of 40 μm to 120 μm. The paper layer may have a thickness of 40 μm to 100 μm. The paper layer may have a thickness of 40 μm to 80 μm.

The aerosol-generating article may include an upstream element located upstream of the aerosol-forming substrate. The upstream element may be located adjacent to the aerosol-forming substrate.

Advantageously, providing an upstream element in combination with the metal layer of the wrapper may reduce migration of one or more components of the aerosol-forming substrate to other parts of the aerosol-generating article.

The upstream element may include a porous element. Porous elements cannot significantly change the resistance to attraction of an aerosol-generating article.

Upstream elements may include annular elements.

A wrapper may wrap around at least a portion of an upstream element. The wrapper may wrap around at least 5% of the length of the upstream element. The wrapper may wrap around at least 10% of the length of the upstream element. The wrapper may wrap around at least 20% of the length of the upstream element. The wrapper may wrap around at least 30% of the length of the upstream element. The wrapper may wrap around at least 40% of the length of the upstream element. The wrapper may wrap around at least 50% of the length of the upstream element. The wrapper may wrap around the entire length of the upstream element.

Advantageously, providing a wrapper over at least a portion of the upstream element can reduce movement of components of the aerosol-forming substrate through bonding between the aerosol-forming substrate and the upstream element.

The upstream element may be made of any material suitable for use in aerosol-generating articles. The upstream element may be manufactured from the same material used in one of the other components of the aerosol-generating article. Suitable materials for forming the upstream element are filter materials, ceramics, polymeric materials, cellulose acetate, cardboard, zeolites. or an aerosol-generating substrate. The upstream element may be formed as a plug of cellulose acetate.

The upstream element may be formed from a heat-resistant material. For example, the upstream element can be formed from a material that resists temperatures of up to 350°C. This can ensure that the upstream elements are not adversely affected by the heating means for heating the aerosol-generating substrate.

The upstream element may have a diameter approximately equal to the diameter of the aerosol-generating article.

The upstream element may have a length of 1 mm to 10 mm. The upstream element may have a length of 3 mm to 8 mm. The upstream element may have a length of 4 mm to 6 mm.

The upstream element may have a length of 5 mm.

The length of the upstream element can advantageously be varied to provide the desired total length of the aerosol-generating article. For example, if it is desirable to reduce the length of one of the other components of the aerosol-generating article, the length of the upstream element may be increased to maintain the same overall length of the article.

The aerosol-generating article may include a downstream element located downstream of the aerosol-forming substrate. The downstream element may be located adjacent to the aerosol-forming substrate.

Advantageously, providing a downstream element in combination with the metal layer of the wrapper may reduce migration of one or more components of the aerosol-forming substrate to other parts of the aerosol-generating article.

A wrapper may wrap around at least a portion of a downstream element. The wrapper may wrap around at least 5% of the length of the downstream element. The wrapper may wrap around at least 10% of the length of the downstream element. The wrapper may wrap around at least 20% of the length of the downstream element. The wrapper may wrap around at least 30% of the length of the downstream element. The wrapper may wrap around at least 40% of the length of the downstream element. The wrapper may wrap around at least 50% of the length of the downstream element. The wrapper may wrap around the entire length of the downstream element.

Advantageously, providing a wrapper over at least a portion of the downstream element can reduce movement of components of the aerosol-forming substrate through bonding between the aerosol-forming substrate and the downstream element.

The downstream element may be made of any material suitable for use in aerosol-generating articles. The downstream element may be made from the same material used in one of the other components of the aerosol-generating article. Suitable materials for forming downstream elements are filter materials, ceramics, polymeric materials, cellulose acetate, cardboard, zeolites. or an aerosol-generating substrate. The downstream element may be formed as a plug of cellulose acetate.

The downstream element may be formed of a heat-resistant material. For example, the upstream element can be formed from a material that resists temperatures of up to 350°C. This can ensure that downstream elements are not adversely affected by the heating means for heating the aerosol-generating substrate.

The downstream element may include a hollow tubular segment. The hollow tubular segment may also be positioned adjacent to the aerosol-forming substrate.

The hollow tubular segment may comprise one cellulose acetate tube. The hollow tubular segment may include two cellulose acetate tubes.

Advantageously, providing a wrapper over at least a portion of the hollow tubular segment can reduce movement of components of the aerosol-forming substrate through bonding between the aerosol-forming substrate and the hollow tubular segment.

The downstream element may be located adjacent to the aerosol-forming substrate.

The downstream element may include a hollow tubular segment.

The downstream element may include a filter plug element.

The downstream element may include a second hollow tubular segment. The second hollow tubular segment can be positioned adjacent the hollow tubular segment.

The wrapper may be wrapped around at least a portion of the second hollow tubular segment. The wrapper may be wrapped around at least 5% of the length of the second hollow tubular segment. The wrapper may be wrapped around at least 10% of the length of the second hollow tubular segment. The wrapper may be wrapped around at least 20% of the length of the second hollow tubular segment. The wrapper may be wrapped around at least 30% of the length of the second hollow tubular segment. The wrapper may be wrapped around at least 40% of the length of the second hollow tubular segment. The wrapper may be wrapped around at least 50% of the length of the second hollow tubular segment. The wrapper may be wrapped around the entire length of the second hollow tubular segment.

The downstream element may include a mouthpiece element at its downstream end. The mouthpiece element may include a mouth end cavity. The mouth end cavity may be defined by a hollow tubular element provided at the downstream end of the mouthpiece element. Alternatively, the mouth end cavity may be defined by an external wrapper, which extends in a downstream direction from the mouthpiece element.

The wrapper may be wrapped around at least a portion of the mouthpiece element. The wrapper may be wrapped around at least 5% of the length of the mouthpiece element. The wrapper may be wrapped around at least 10% of the length of the mouthpiece element. The wrapper may be wrapped around at least 20% of the length of the mouthpiece element. The wrapper may be wrapped around at least 30% of the length of the mouthpiece element. The wrapper may be wrapped around at least 40% of the length of the mouthpiece element. The wrapper may be wrapped around at least 50% of the length of the mouthpiece element. The wrapper may be wrapped around the entire length of the mouthpiece element.

In an aerosol-generating article, the upstream element, the aerosol-forming substrate, the hollow tubular segment, the second hollow tubular segment, and the mouthpiece element may be referred to as elements of the aerosol-generating article.

The wrapper may be wrapped around at least one element of the aerosol-generating article. The wrapper may be wrapped around at least two elements of the aerosol-generating article. The wrapper may be wrapped around at least three elements of the aerosol-generating article. The wrapper may be wrapped around at least four elements of the aerosol-generating article. The wrapper may be wrapped around at least five elements of the aerosol-generating article. The wrapper can be wrapped around any element of the aerosol-generating article. For example, in an aerosol-generating article comprising an upstream element, an aerosol-forming substrate, a hollow tubular segment, a second hollow tubular segment, and a mouthpiece element, the wrapper can be wrapped around all of these elements.

The wrapper may be wrapped around at least 25% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 30% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 35% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 40% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 45% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 50% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 55% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 60% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 65% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 70% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 75% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 80% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 85% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 90% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 95% of the length of the aerosol-generating article. The wrapper may be wrapped around at least 100% of the length of the aerosol-generating article.

The wrapper may be wrapped around substantially the entire length of the aerosol-generating article. The wrapper may be wrapped around the entire length of the aerosol-generating article.

One or more elements of the aerosol-generating article may include an element wrapper wrapped around substantially the entire length of the element. One or more elements of the aerosol-generating article may include an element wrapper wrapped around the entire length of the element.

For example, an aerosol-forming substrate can include an element wrapper wrapped around the length of a rod of aerosol-forming substrate. An upstream element may contain an element wrapper wrapped around the length of the upstream element. The hollow tubular segment may include an element wrapper wrapped around the length of the hollow tubular segment. The second hollow tubular segment may include an element wrapper wrapped around the length of the second hollow tubular segment. The mouthpiece element may include an element wrapper wrapped around the length of the mouthpiece element.

Preferably, when the wrapper is wrapped around the length of at least two elements of the aerosol-generating article, at least one of the elements comprises an element wrapper.

The element wrapper may include a paper layer.

A wrapper can be wrapped around and on top of one or more element wrappers.

Aerosol-forming substrates may include gels. The aerosol-forming substrate may include a film. The aerosol-forming substrate may include crumpled tobacco. The aerosol-forming substrate may include tobacco cut filler.

Aerosol-forming substrates may include colloids. Colloids can have discrete solid particles dispersed within a continuous liquid. Colloids can have discrete liquid particles dispersed within a continuous liquid. Colloids can have discrete liquid particles dispersed within a continuous solid.

The aerosol-forming substrate may be solid.

The aerosol-forming substrate may be a film.

As used herein, unless otherwise specified, the term “weight percent” refers to dry weight.

The aerosol-forming substrate may have an aerosol former content greater than 5% by weight. The aerosol-forming substrate may have an aerosol former content greater than 10% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 15% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 20% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 25% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 30% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 35% by weight. The aerosol-forming substrate may have an aerosol former content greater than 40% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 45% by weight. The aerosol-forming substrate may have an aerosol former content of greater than 50% by weight. The aerosol-forming substrate can have an aerosol former content of at least 60% by weight. The aerosol-forming substrate can have an aerosol former content of at least 70% by weight. The aerosol-forming substrate can have an aerosol former content of at least 80% by weight. The aerosol-forming substrate can have an aerosol former content of at least 90% by weight. The aerosol-forming substrate can have an aerosol former content of at least 95% by weight. The aerosol-forming substrate can have an aerosol former content of at least 97% by weight. The aerosol-forming substrate can have an aerosol former content of at least 99% by weight.

The aerosol-forming substrate can have an aerosol former content of at least 99% by weight. The aerosol-forming substrate can have an aerosol former content of at least 97% by weight. The aerosol-forming substrate can have an aerosol former content of at least 95% by weight. The aerosol-forming substrate may have an aerosol former content of less than 90% by weight. The aerosol-forming substrate may have an aerosol former content of less than 80% by weight. The aerosol-forming substrate may have an aerosol former content of less than 70% by weight. The aerosol-forming substrate may have an aerosol former content of less than 60% by weight.

The aerosol-forming substrate can have an aerosol former content of 40% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 40% to 80% by weight. The aerosol-forming substrate can have an aerosol former content of 40% to 70% by weight. The aerosol-forming substrate can have an aerosol former content of 40% to 60% by weight. The aerosol-forming substrate may have an aerosol former content of 40% to 50% by weight.

The aerosol-forming substrate can have an aerosol former content of 40% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 50% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 60% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 70% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 80% to 90% by weight.

The aerosol-forming substrate can have an aerosol former content of 50% to 90% by weight. The aerosol-forming substrate can have an aerosol former content of 50% to 80% by weight. The aerosol-forming substrate can have an aerosol former content of 60% to 80% by weight. The aerosol-forming substrate may have an aerosol former content of 60% to 70% by weight.

The aerosol-forming substrate can have an aerosol-forming agent content of at least 100 milligrams. The aerosol-forming substrate can have an aerosol-forming agent content of at least 200 milligrams. The aerosol-forming substrate can have an aerosol-forming agent content of at least 250 milligrams.

The aerosol-forming substrate can have an aerosol-forming agent content of at least 500 milligrams. The aerosol-forming substrate may have an aerosol former content of less than 400 milligrams. The aerosol-forming substrate may have an aerosol former content of less than 300 milligrams.

The aerosol-forming substrate can have an aerosol-forming agent content of 100 milligrams to 500 milligrams. The aerosol-forming substrate can have an aerosol-forming agent content of 100 milligrams to 400 milligrams. The aerosol-forming substrate can have an aerosol-forming agent content of 200 milligrams to 400 milligrams. The aerosol-forming substrate can have an aerosol-forming agent content of 200 milligrams to 300 milligrams.

The aerosol-forming substrate may have an aerosol-forming agent content of at least 0.05 g/cm³. The aerosol-forming substrate may have an aerosol-forming agent content of at least 0.1 g/cm³.

The aerosol-forming substrate may have an aerosol former content of less than 0.3 g/cm³. The aerosol-forming substrate may have an aerosol former content of less than 0.25 g/cm³.

The aerosol-generating substrate may have an aerosol former content of 0.05 g/cm³ to 0.3 g/cm³. The aerosol-generating substrate may have an aerosol former content of 0.1 g/cm³ to 0.25 g/cm³.

One or more aerosol formers may include glycerin. One or more aerosol formers may include propylene glycol. One or more aerosol formers may include glycerin and propylene glycol.

The aerosol-forming substrate may include water.

The aerosol-forming substrate may have a water content of at least 10% by weight. The aerosol-forming substrate may have a water content of at least 15% by weight. The aerosol-forming substrate can have a water content of at least 20% by weight.

The aerosol-forming substrate may have a water content of less than 30% by weight. The aerosol-forming substrate may have a water content of less than 25% by weight. The aerosol-forming substrate may have a water content of less than 20% by weight.

The aerosol-forming substrate can have a water content of 10% to 30% by weight. The aerosol-forming substrate can have a water content of 10% to 25% by weight. The aerosol-forming substrate may have a water content of 15% to 25% by weight. The aerosol-forming substrate may have a water content of 15% to 20% by weight. The aerosol-forming substrate can have a water content of 20% to 25% by weight.

The aerosol-forming substrate may include nicotine.

The aerosol-forming substrate may have a nicotine content of at least 0.5% by weight. The aerosol-forming substrate may have a nicotine content of at least 1% by weight. The aerosol-forming substrate may have a nicotine content of at least 1.5% by weight. The aerosol-forming substrate may have a nicotine content of at least 2% by weight. The aerosol-forming substrate may have a nicotine content of at least 2.5% by weight. The aerosol-forming substrate may have a nicotine content of at least 5% by weight.

The aerosol-forming substrate may have a nicotine content of less than 5% by weight. The aerosol-forming substrate may have a nicotine content of less than 2.5% by weight. The aerosol-forming substrate may have a nicotine content of less than 2% by weight. The aerosol-forming substrate may have a nicotine content of less than 1.5% by weight.

The aerosol-forming substrate may have a nicotine content of 0.5% to 5% by weight. The aerosol-forming substrate may have a nicotine content of 0.5% to 2.5% by weight. The aerosol-forming substrate may have a nicotine content of 1% to 2.5% by weight. The aerosol-forming substrate may have a nicotine content of 1% to 2% by weight. The aerosol-forming substrate may have a nicotine content of 1.5% to 2% by weight. The aerosol-forming substrate may have a nicotine content of 1% to 1.5% by weight.

The aerosol-forming substrate may include a film former.

Film formers may include cellulosic film formers.

The cellulosic film former may be carboxymethyl cellulose.

Carboxymethyl cellulose may be sodium carboxymethyl cellulose.

The aerosol-forming substrate may have a film former content of at least 0.5% by weight. The aerosol-forming substrate may have a film former content of at least 1% by weight. The aerosol-forming substrate may have a film former content of at least 1.5% by weight. The aerosol-forming substrate may have a film former content of at least 2% by weight. The aerosol-forming substrate may have a film former content of at least 2.4% by weight. The aerosol-forming substrate may have a film former content of at least 2.5% by weight.

The aerosol-forming substrate may have a film former content of less than 5% by weight. The aerosol-forming substrate may have a film former content of less than 4% by weight. The aerosol-forming substrate may have a film former content of less than 3% by weight. The aerosol-forming substrate may have a film former content of less than 2.5% by weight.

The aerosol-forming substrate may have a film former content of 0.5% to 5% by weight. The aerosol-forming substrate may have a film former content of 0.5% to 4% by weight. The aerosol-forming substrate may have a film former content of 1% to 4% by weight. The aerosol-forming substrate may have a film former content of 1% to 3% by weight. The aerosol-forming substrate may have a film former content of 1.5% to 3% by weight. The aerosol-forming substrate may have a film former content of 1.5% to 2.5% by weight. The aerosol-forming substrate may have a film former content of 2% to 2.5% by weight.

The aerosol-forming substrate may have a carboxymethyl cellulose content of at least 0.5% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of at least 1% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of at least 1.5% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of at least 2% by weight. The aerosol-forming substrate can have a carboxymethyl cellulose content of at least 2.4% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of at least 2.5% by weight.

The aerosol-forming substrate may have a carboxymethyl cellulose content of less than 5% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of less than 4% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of less than 3% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of less than 2.5% by weight.

The aerosol-forming substrate may have a carboxymethyl cellulose content of 0.5% to 5% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 0.5% to 4% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 1% to 4% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 1% to 3% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 1.5% to 3% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 1.5% to 2.5% by weight. The aerosol-forming substrate may have a carboxymethyl cellulose content of 2% to 2.5% by weight.

The aerosol-forming substrate may include one or more acids.

The one or more acids may be one or more organic acids.

The at least one organic acid is preferably at least one carboxylic acid.

The one or more carboxylic acids may be lactic acid.

The one or more carboxylic acids may be levulinic acid.

The aerosol-forming substrate may have an acid content of at least 0.5% by weight. The aerosol-forming substrate may have an acid content of at least 1% by weight. The aerosol-forming substrate may have an acid content of at least 1.5% by weight. The aerosol-forming substrate may have an acid content of at least 1.7% by weight. The aerosol-forming substrate may have an acid content of at least 2% by weight.

The aerosol-forming substrate may have an acid content of less than 5% by weight. The aerosol-forming substrate may have an acid content of less than 2.5% by weight. The aerosol-forming substrate may have an acid content of less than 2% by weight. The aerosol-forming substrate may have an acid content of less than 1.7% by weight. The aerosol-forming substrate may have an acid content of less than 1.5% by weight.

The aerosol-forming substrate may have an acid content of 0.5% to 5% by weight. The aerosol-forming substrate may have an acid content of 0.5% to 2.5% by weight. The aerosol-forming substrate may have an acid content of 1% to 2.5% by weight. The aerosol-forming substrate may have an acid content of 1% to 2% by weight. The aerosol-forming substrate may have an acid content of 1.5% to 2% by weight.

The aerosol-forming substrate may have a lactic acid content of at least 0.5% by weight. The aerosol-forming substrate may have a lactic acid content of at least 1% by weight. The aerosol-forming substrate may have a lactic acid content of at least 1.5% by weight. The aerosol-forming substrate may have a lactic acid content of at least 1.7% by weight. The aerosol-forming substrate may have a lactic acid content of at least 2% by weight.

The aerosol-forming substrate may have a lactic acid content of less than 5% by weight. The aerosol-forming substrate may have a lactic acid content of less than 2.5% by weight. The aerosol-forming substrate may have a lactic acid content of less than 2% by weight. The aerosol-forming substrate may have a lactic acid content of less than 1.7% by weight. The aerosol-forming substrate may have a lactic acid content of less than 1.5% by weight.

The aerosol-forming substrate may have a lactic acid content of 0.5% to 5% by weight. The aerosol-forming substrate may have a lactic acid content of 0.5% to 2.5% by weight. The aerosol-forming substrate may have a lactic acid content of 1% to 2.5% by weight. The aerosol-forming substrate may have a lactic acid content of 1% to 2% by weight. The aerosol-forming substrate may have a lactic acid content of 1.5% to 2% by weight.

The aerosol-forming substrate may have a moisture content of at least 10% by weight. The aerosol-forming substrate may have a moisture content of at least 15% by weight. The aerosol-forming substrate may have a moisture content of at least 20% by weight. The aerosol-forming substrate can have a moisture content of at least 25% by weight.

The aerosol-forming substrate may have a moisture content of less than 30% by weight. The aerosol-forming substrate may have a moisture content of less than 25% by weight. The aerosol-forming substrate may have a moisture content of less than 20% by weight. The aerosol-forming substrate may have a moisture content of less than 15% by weight.

The aerosol-forming substrate can have a moisture content of 10% to 30% by weight. The aerosol-forming substrate may have a moisture content of 10% to 25% by weight. The aerosol-forming substrate may have a moisture content of 10% to 20% by weight. The aerosol-forming substrate may have a moisture content of 10% to 15% by weight.

The aerosol-forming substrate can have a moisture content of 15% to 30% by weight. The aerosol-forming substrate can have a moisture content of 20% to 30% by weight. The aerosol-forming substrate may have a moisture content of 25% to 30% by weight.

The aerosol-forming substrate may have a moisture content of 15% to 25% by weight. The aerosol-forming substrate may have a moisture content of 20% to 25% by weight. The aerosol-forming substrate may have a moisture content of 15% to 20% by weight.

The moisture content is measured according to the method defined in the description below.

The term “length” refers to the dimension of an aerosol-generating article or aerosol-generating article component in the longitudinal direction.

The aerosol-generating article may have a length of less than 100 mm. The aerosol-generating article may have a length of less than 90 mm. The aerosol-generating article may have a length of less than 80 mm. The aerosol-generating article may have a length of less than 70 mm. The aerosol-generating article may have a length of less than 60 mm. The aerosol-generating article may have a length of less than 50 mm.

The aerosol-generating article may have a length of 30 mm or more. The aerosol-generating article may have a length of 35 mm or more. The aerosol-generating article may have a length of 38 mm or more. The aerosol-generating article may have a length of 40 mm or more. The aerosol-generating article may have a length of 42 mm or more. The aerosol-generating article may have a length of 45 mm or more.

The aerosol-generating article can have a length of 38 mm to 70 mm. The aerosol-generating article may have a length of 40 mm to 70 mm. The aerosol-generating article can have a length of 42 mm to 70 mm.

The aerosol-generating article can have a length of 38 mm to 60 mm. The aerosol-generating article may have a length of 40 mm to 60 mm.

The aerosol-generating article can have a length of 38 mm to 50 mm. The aerosol-generating article may have a length of 42 mm to 50 mm.

The aerosol-generating article may have a length of 45 mm.

The aerosol-generating article may have an outer diameter of less than 15 mm. The aerosol-generating article may have an outer diameter of less than 12 mm. The aerosol-generating article may have an outer diameter of less than 10 mm. The aerosol-generating article may have an outer diameter of less than 8 mm.

The aerosol-generating article may have an outer diameter of 5 mm or more. The aerosol-generating article may have an outer diameter of 6 mm or more. The aerosol-generating article may have an outer diameter of 7 mm or more.

The aerosol-generating article may have an outer diameter of 5 mm to 12 mm. The aerosol-generating article may have an outer diameter of 6 mm to 12 mm. The aerosol-generating article may have an outer diameter of 7 mm to 12 mm.

The aerosol-generating article may have an outer diameter of 5 mm to 10 mm. The aerosol-generating article may have an outer diameter of 6 mm to 10 mm. The aerosol-generating article may have an outer diameter of 7 mm to 10 mm.

The aerosol-generating article may have an outer diameter of 5 mm to 8 mm. The aerosol-generating article may have an outer diameter of 6 mm to 8 mm. The aerosol-generating article may have an outer diameter of 7 mm to 8 mm.

The aerosol-generating article may include at least an aerosol-forming substrate and an outermost wrapper wrapped around the wrapper.

The outermost wrapper may be formed of paper.

The aerosol-generating article may include a susceptor element. The aerosol-generating article may include a plurality of susceptor elements.

The susceptor element may be an elongated susceptor element. The susceptor element may be rod-shaped. The susceptor element may be flat. Preferably, the susceptor element has a length of 12 mm. Preferably, the susceptor element has a width of 5 mm. Preferably, the susceptor element has a thickness of 60 mm.

When used to describe a susceptor element, the term “elongate” means that the susceptor element has a length dimension that is greater than its width dimension or its thickness dimension. For example, the length dimension may be greater than twice the width dimension or the thickness dimension.

The susceptor elements may be arranged substantially longitudinally within the aerosol-generating article. This means that the length dimension of the susceptor element is arranged approximately parallel to the longitudinal direction of the aerosol-generating article. For example, the susceptor elements can be arranged parallel to within ±10 degrees of the longitudinal direction of the aerosol-generating article. The susceptor element may be located at a radially central location within the aerosol-generating article. The susceptor element may extend along the longitudinal axis of the rod.

The susceptor element may be provided within the aerosol-forming substrate. The susceptor element may extend along the entire length of the aerosol-forming substrate.

The susceptor element may be a plurality of susceptor particles that may be deposited on or embedded within an aerosol-forming substrate. The susceptor particles can be immobilized by the aerosol-forming substrate and maintained in the initial position. The susceptor particles are homogeneously distributed on the aerosol-forming substrate. Because of the particulate nature of the susceptor, heat can be generated depending on the particle distribution within the aerosol-forming substrate. Alternatively, the susceptor elements may be in the form of one or more sheets, strips, shreds or rods, which may be placed next to or embedded within the aerosol-forming substrate. The aerosol-forming substrate may include one or more susceptor strips.

As used herein, the term “thickness” refers to the distance through the susceptor from one outer surface to the other outer surface. The susceptor element may have a thickness of 1 mm to 5 mm. The susceptor element may have a thickness of 0.01 mm to 2 mm. The susceptor element may have a thickness of 0.5 mm to 2 mm. The susceptor element may have a thickness of 10 μm to 500 μm. The susceptor element may have a thickness of 10 μm to 100 μm.

The susceptor may have a constant cross-section. The susceptor element may have a circular cross-section. If the susceptor element has a circular cross-section, the susceptor element may have a diameter of 1 mm to 5 mm. The diameter of a susceptor with a non-circular cross-section, such as a flat susceptor, may be equivalent to the thickness of the flat susceptor.

The susceptor element may have a diameter of less than 5 mm. The susceptor element may have a diameter of less than 4 mm. The susceptor element may have a diameter of less than 3 mm. The susceptor element may have a diameter of less than 2 mm.

The susceptor element may have a diameter of 1 mm or more. The susceptor element may have a diameter of 2 mm or more. The susceptor element may have a diameter of 3 mm or more. The susceptor element may have a diameter of 4 mm or more.

For example, if the susceptor element has a circular cross-section, the width of the susceptor element may be equal to the diameter of the susceptor element.

The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 3000. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 2750. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 2500. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 2250. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 2000. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 1750. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 1500. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 1250. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be less than 1000.

The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1000 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1250 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1500 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1750 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 2000 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 2250 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 2500 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 2750 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 3000 or more. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1000 to 3000. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1250 to 3000. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1250 to 2750. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1500 to 2750. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1500 to 2500. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1750 to 2500. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1750 to 2250. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 2000 to 2250. The ratio of the thickness of the susceptor element to the thickness of the metal layer may be 1750 to 2000.

The total exposed surface area of the aerosol-forming substrate can be maximized by increasing the bulk density of the aerosol-generating substrate such that a greater amount of substrate, and therefore potentially a greater exposed surface area, can be provided per unit volume of the plug of aerosol-generating substrate. there is. Thereby, the efficiency of aerosol release from a given volume of aerosol-forming substrate can be improved.

Mitigating migration of components from the aerosol-forming substrate can be particularly important when bulk densities are high as the aerosol-forming substrate moves in contact with the wrapper.

The bulk density of the aerosol-forming substrate may be at least 100 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 200 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 300 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 400 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 500 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 600 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 750 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 850 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be at least 1000 mg/cm³ of the aerosol-forming substrate.

The bulk density of the aerosol-forming substrate may be less than 2000 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 1750 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 1500 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 1250 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 1000 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 850 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 750 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be less than 600 mg/cm³ of the aerosol-forming substrate.

The bulk density of the aerosol-forming substrate can be from 100 mg/cm³ of the aerosol-forming substrate to 2000 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate can be from 200 mg/cm³ of the aerosol-forming substrate to 1500 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate can be from 300 mg/cm³ of the aerosol-forming substrate to 1000 mg/cm³ of the aerosol-forming substrate. The bulk density of the aerosol-forming substrate may be from 400 mg/cm³ of the aerosol-forming substrate to 600 mg/cm³ of the aerosol-forming substrate.

The bulk density of an aerosol-generating substrate corresponds to the total weight of the aerosol-forming substrate (in mg) divided by the total volume of the aerosol-forming substrate (in cm³), excluding the weight of any carrier material.

The aerosol-generating system may include an aerosol-generating device.

An aerosol-generating device can include a housing defining a device cavity configured to receive at least a portion of an aerosol-generating article.

An aerosol-generating device may include a nebulizer configured to generate an aerosol from an aerosol-forming substrate.

The nebulizer may be a thermal nebulizer.

As used herein, the term “thermal nebulizer” describes a nebulizer configured to generate an aerosol by heating an aerosol-forming substrate.

The aerosol-generating device may include any suitable type of thermal nebulizer. For example, a thermal nebulizer may include a heater. The thermal nebulizer may include an electric heater. In one example, a thermal nebulizer may include an electric heater including a resistive heating element. The heating element may be a resistive heating element. In one example, the heating element may be a heater blade or fin adapted to be inserted into the aerosol-forming substrate such that the aerosol-forming substrate is heated from the inside. In another example, the heating element can partially or fully surround the aerosol-forming substrate and heat the aerosol-forming substrate circumferentially from the outside.

In another example, the thermal nebulizer may include an induction heating device. The induction heating device generally comprises an induction source configured to be coupled to a susceptor element, which may be provided externally to the aerosol-forming substrate or may be provided internally to the aerosol-forming substrate. The induction source generates an alternating electromagnetic field, which induces magnetization or eddy currents within the susceptor element. The susceptor element may heat as a result of hysteresis losses or induced eddy currents that heat the susceptor element through ohmic or resistive heating.

The aerosol-generating device may include a susceptor. The susceptor element may be as described above with respect to the aerosol-generating article.

An aerosol-generating device comprising an induction heating device can be configured to receive an aerosol-generating article having an aerosol-forming substrate and a susceptor element in thermal proximity to the aerosol-forming substrate. Typically, the susceptor element is in direct contact with the aerosol-forming substrate, and heat is transferred from the susceptor element to the aerosol-forming substrate primarily by conduction.

Examples of electrically operated aerosol-generating systems with induction heating devices and aerosol-generating articles with susceptor elements are described in WO-A1-95/27411 and WO-A1-2015/177255.

The aerosol-generating device may include a battery and control electronics.

Any feature described herein in connection with an embodiment of an aerosol-forming substrate, aerosol-generating article, aerosol-generating device, or aerosol-generating system according to the present disclosure may It will be understood that this may apply to other implementations of the system as well. Features described in relation to one implementation may be equally applied to other implementations according to the present disclosure. It will also be appreciated that the aerosol generator according to the present disclosure may be provided in a cartridgeless aerosol generating device. Accordingly, any features described herein with respect to cartridges may be equally applicable to an aerosol-generating device.

The invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any one or more features of these embodiments may be combined with any one or more features of other embodiments, implementations, or aspects described herein.

EX1. As an aerosol-generating article,

An aerosol-forming substrate comprising at least one aerosol-forming agent; and

Including wrappers,

the wrapper is wrapped around the aerosol-forming substrate,

The wrapper includes a metal layer,

An aerosol-generating article, wherein the aerosol-forming substrate has an aerosol former content of at least 40% by weight.

EX2. The aerosol-generating article of Example EX1, wherein the wrapper comprises a paper layer.

EX3. The aerosol-generating article of Example EX2, wherein the metal layer is radially inside the paper layer.

EX4. The aerosol-generating article of Example EX2 or EX3, wherein the wrapper comprises a metal layer deposited on the paper layer.

EX5. The aerosol-generating article of Example EX2 or EX3, wherein the wrapper comprises a laminate of a metal layer secured on the paper layer.

EX6. The aerosol-generating article according to any one of Examples EX2 to EX5, wherein the metal layer has a thickness of at least 2 nm.

EX6. The aerosol-generating article of any of Examples EX2-EX6, wherein the metal layer has a thickness of less than 100 nm.

EX7. The aerosol-generating article according to any one of Examples EX2 to EX6, wherein the metal layer has a thickness of 10 nm to 60 nm.

EX8. The aerosol-generating article of any one of Examples EX1-EX7, wherein the metal layer comprises aluminum.

EX9. The aerosol-generating article of any of Examples EX2-EX8, wherein the paper layer has a thickness of at least 10 μm.

EX10. The aerosol-generating article of any of Examples EX2-EX9, wherein the paper layer has a thickness of less than 120 μm.

EX11. The aerosol-generating article according to any one of Examples EX2 to EX10, wherein the paper layer has a thickness of 40 μm to 80 μm.

EX12. The aerosol-generating article of any one of Examples EX1-EX11, wherein the wrapper is wrapped around the entire length of the aerosol-forming substrate.

EX13. The aerosol-generating article of any of Examples EX1-EX12, comprising an upstream element located upstream of the aerosol-forming substrate.

EX14. The aerosol-generating article of Example EX13, wherein the upstream element comprises an annular plug.

EX15. The aerosol-generating article of Example EX13 or EX14, wherein the wrapper wraps around at least a portion of the upstream element.

EX16. The aerosol-generating article of Example EX15, wherein the wrapper covers the entire length of the upstream element.

EX17. The aerosol-generating article of any of Examples EX1-EX16, comprising a hollow tubular segment downstream of the aerosol-forming substrate.

EX18. The aerosol-generating article of Example EX17, wherein the hollow tubular segment is a cellulose acetate tube.

EX19. The aerosol-generating article of Example EX17 or EX18, wherein the wrapper is wrapped around at least a portion of the hollow tubular segment.

EX20. The aerosol-generating article of any one of Examples EX1 to EX19, wherein the aerosol-forming substrate has at least 50% by weight of aerosol former.

EX21. The aerosol-generating article according to any one of Examples EX1 to EX20, wherein the aerosol-forming substrate has an aerosol former content of at least 60% by weight.

EX21. The aerosol-generating article according to any one of Examples EX1 to EX21, wherein the aerosol-forming substrate has an aerosol former content of less than 90% by weight.

EX22. The aerosol-generating article of any one of Examples EX1-EX22, wherein the aerosol-forming substrate has an aerosol former content of less than 80% by weight.

EX23. The aerosol-generating article according to any one of Examples EX1 to EX22, wherein the aerosol-forming substrate has an aerosol former content of 40% to 90% by weight.

EX24. The aerosol-generating article according to any one of Examples EX1 to EX23, wherein the aerosol-forming substrate has an aerosol former content of 50% to 80% by weight.

EX25. The aerosol-generating article of any of Examples EX1-EX24, wherein the aerosol-forming substrate has an aerosol former content of at least 100 milligrams.

EX26. The aerosol-generating article of any one of Examples EX1 to EX25, wherein the aerosol-forming substrate has an aerosol former content of at least 200 milligrams.

EX27. The aerosol-generating article of any one of Examples EX1-EX26, wherein the aerosol-forming substrate has an aerosol former content of less than 400 milligrams.

EX28. The aerosol-generating article of any one of Examples EX1-EX27, wherein the aerosol-forming substrate has an aerosol former content of less than 300 milligrams.

EX29. The aerosol-generating article of any one of Examples EX1 to EX28, wherein the aerosol-forming substrate has an aerosol former content of from 100 milligrams to 400 milligrams.

EX30. The aerosol-generating article of any one of Examples EX1-EX29, wherein the aerosol-forming substrate has an aerosol former content of 200 milligrams to 300 milligrams.

EX31. The aerosol-generating article according to any one of Examples EX1 to EX30, wherein the aerosol-forming substrate has an aerosol former content of at least 0.05 g/cm³.

EX32. The aerosol-generating article according to any one of Examples EX1 to EX31, wherein the aerosol-forming substrate has an aerosol former content of at least 0.1 g/cm³.

EX33. The aerosol-generating article of any one of Examples EX1 to EX32, wherein the aerosol-forming substrate has an aerosol former content of less than 0.3 g/cm³.

EX34. The aerosol-generating article of any one of Examples EX1 to EX33, wherein the aerosol-forming substrate has an aerosol former content of less than 0.25 g/cm³.

EX35. The aerosol-generating article according to any one of Examples EX1 to EX34, wherein the aerosol-forming substrate has an aerosol former content of 0.05 g/cm3 to 0.3 g/cm3.

EX36. The aerosol-generating article according to any one of Examples EX1 to EX35, wherein the aerosol-forming substrate has an aerosol former content of 0.1 g/cm3 to 0.25 g/cm3.

EX37. The aerosol-generating article of any one of Examples EX1 to EX36, wherein the one or more aerosol formers comprise one or more of glycerin and propylene glycol.

EX38. The aerosol-generating article of any of Examples EX1-EX37, wherein the aerosol-forming substrate has a moisture content of at least 10% by weight, as determined according to the method defined herein.

EX39. The aerosol-generating article of any of Examples EX1-EX38, wherein the aerosol-forming substrate has a moisture content of at least 15% by weight, as determined according to the method defined herein.

EX40. The aerosol-generating article of any one of Examples EX1 to EX39, wherein the aerosol-forming substrate has a moisture content of less than 30% by weight, as determined according to the method defined herein.

EX41. The aerosol-generating article of any one of Examples EX1-EX40, wherein the aerosol-forming substrate has a moisture content of less than 25% by weight, as determined according to the method defined herein.

EX42. The aerosol-generating article of any one of Examples EX1 to EX41, wherein the aerosol-forming substrate has a moisture content of from 10% to 30% by weight, as determined according to the method defined herein.

EX43. The aerosol-generating article of any one of Examples EX1 to EX42, wherein the aerosol-forming substrate has a moisture content of 15% to 25% by weight, determined according to the method defined herein.

EX44. The aerosol-generating article of any one of Examples EX1 to EX43, wherein the aerosol-generating article has a length of less than 100 mm.

EX45. The aerosol-generating article of any one of Examples EX1 to EX44, wherein the aerosol-generating article has a length of less than 80 mm.

EX46. The aerosol-generating article according to any one of Examples EX1 to EX45, wherein the aerosol-generating article has a length of 38 mm to 70 mm.

EX47. The aerosol-generating article according to any one of Examples EX1 to EX46, wherein the aerosol-generating article has a length of 42 mm to 50 mm.

EX48. The aerosol-generating article of any of Examples EX1-EX47, comprising at least the aerosol-forming substrate and an outermost wrapper wrapped around the wrapper.

EX49. The aerosol-generating article of any of Examples EX1 to EX48, comprising a susceptor element.

EX50. The aerosol-generating article of Example EX49, wherein the susceptor element extends the entire length of the aerosol-forming substrate.

EX51. The aerosol-generating article of Example EX49 or EX50, wherein the susceptor element is rod-shaped.

EX52. The aerosol-generating article of any one of Examples EX49 to EX51, wherein the susceptor element has a diameter of less than 5 mm.

EX53. The aerosol-generating article of any of Examples EX49 to EX52, wherein the susceptor element has a diameter of less than 4 mm.

EX54. The aerosol-generating article of any one of Examples EX49 to EX53, wherein the susceptor element has a diameter of at least 1 mm.

EX55. The aerosol-generating article of any one of Examples EX49 to EX54, wherein the susceptor element has a diameter of at least 2 mm.

EX56. The aerosol-generating article according to any one of Examples EX49 to EX55, wherein the susceptor element has a diameter of 1 mm to 5 mm.

EX57. The aerosol-generating article according to any one of Examples EX49 to EX56, wherein the susceptor element has a diameter of 2 mm to 4 mm.

EX58. The aerosol-generating article of any of Examples EX49 to EX57, wherein the ratio of the thickness of the susceptor element to the thickness of the metal layer is less than 2500.

EX59. The aerosol-generating article according to any one of Examples EX49 to EX58, wherein the ratio of the thickness of the susceptor element to the thickness of the metal layer is 1500 or greater.

EX60. The aerosol-generating article according to any one of Examples EX49 to EX59, wherein the ratio of the thickness of the susceptor element to the thickness of the metal layer is 1500 to 2500.

EX61. The aerosol-generating article of any of Examples EX49 to EX60, wherein the aerosol-forming substrate has a bulk density of at least 100 mg/cm³.

EX62. The aerosol-generating article of any of Examples EX49 to EX61, wherein the aerosol-forming substrate has a bulk density of less than 2000 mg/cm³.

EX63. The aerosol-generating article of any one of Examples EX49 to EX62, wherein the aerosol-forming substrate has a bulk density of 100 mg/cm3 to 2000 mg/cm3.

EX64. The aerosol-generating article of any of Examples EX1-EX63, comprising a mouthpiece element.

EX65. The aerosol-generating article of Example EX64, wherein the wrapper is wrapped around at least a portion of the mouthpiece element.

EX66. The aerosol-generating article of any of Examples EX1-EX65, comprising a second hollow tubular segment, wherein the second hollow tubular segment is downstream of the aerosol-forming substrate.

EX67. The aerosol-generating article of Example EX66, wherein the second hollow tubular segment is a cardboard tube.

EX68. The aerosol-generating article of Example EX66 or EX67, wherein the wrapper is wrapped around at least a portion of the second hollow tubular segment.

The present invention will be further explained with reference to the accompanying drawings, wherein:
Figure 1 shows a schematic cross-sectional side view of an aerosol-generating article according to the invention.
Figure 2 shows a schematic cross-sectional side view of an aerosol-generating article according to the invention.
Figure 3 shows a schematic cross-sectional side view of another aerosol-generating article according to the invention.
Figure 4 shows a schematic cross-sectional side view of another aerosol-generating article according to the invention.
Figure 5 shows a schematic cross-sectional side view of another aerosol-generating article according to the invention.
Figure 6 shows a schematic cross-sectional side view of an aerosol-generating article according to the invention.

Aerosol-generating systems for delivering an aerosol to a user typically include an aerosol-generating article and a nebulizer. Aerosol-generating articles include aerosol-forming substrates. The nebulizer is configured to generate an inhalable aerosol from an aerosol-forming substrate. Some known aerosol generating systems include thermal nebulizers such as electric heaters or induction heating devices. Thermal nebulizers are configured to heat and vaporize an aerosol-forming substrate to generate an aerosol, which can be inhaled by a user. A typical aerosol-forming substrate for use in an aerosol-generating system is a nicotine formulation, which may be a liquid nicotine formulation containing an aerosol former such as glycerin.

The aerosol-forming substrate is typically held within a plug of porous material. In some cases, it has been found that quantities of one or more components of the aerosol-forming substrate, such as glycerin or nicotine, can leak out of the plug and migrate to other parts of the aerosol-generating article. Moving the aerosol-forming substrate away from the plug can reduce the amount of aerosol-forming substrate that can vaporize and then be inhaled by the user.

Accordingly, moving components of the aerosol-forming substrate away from the plug may have a negative impact on the user experience provided by the aerosol-generating article. For example, migration of nicotine from the aerosol-forming substrate can reduce the amount of nicotine that can be inhaled by the user.

Migration of components of the aerosol-forming substrate from the plug has been found to be particularly problematic for aerosol-forming substrates with significant amounts of aerosol-forming agent, such as aerosol-forming agent content greater than 40% by weight. This may be because the increased proportion of glycerin in the aerosol-forming substrate provides a more fluid aerosol-forming substrate that is more responsible for leakage.

One known solution is to wrap the aerosol-generating article with hydrophobic paper. However, the inventors have discovered that when using hydrophobic paper, some of the aerosol formers in the aerosol-forming substrate may migrate into the paper during the process of making the aerosol-generating article. This can moisten or soften the hydrophobic paper, which can make the aerosol-generating article difficult to handle or cause the aerosol-generating article to become stuck in machinery used to manufacture the aerosol-generating article.

It would be desirable to provide an aerosol-generating article with a reduced likelihood that components of the aerosol-generating substrate will migrate from the aerosol-forming substrate to other parts of the aerosol-generating article.

Figure 1 schematically shows an example of an aerosol-generating article 10.

The aerosol-generating article 100 includes a rod 12 of an aerosol-forming substrate. In this example, the rod 12 of aerosol-forming substrate is formed by crimping a portion of a cast leaf tobacco sheet.

Aerosol-generating article 100 also includes a downstream section 14 and an upstream section 16. The downstream section 14 is located downstream of the rod 12 of the aerosol-generating substrate. The upstream section 16 is located upstream of the rod 12 of the aerosol-generating substrate. In this example, the aerosol-generating article 100 extends from an upstream end (or distal end) 18 to a downstream end (or mouth end) 20.

In the example shown in Figure 1, the aerosol-generating article 100 has an overall length of approximately 45 mm.

The downstream section 14 includes a support element 22 located immediately downstream of the rod 12 of the aerosol-forming substrate. The support element 22 is longitudinally aligned with the rod 12 of the aerosol-forming substrate.

In the example shown in Figure 1, the upstream end of the support element 22 abuts the downstream end of the rod 12 of the aerosol-forming substrate.

The downstream section 14 includes an aerosol cooling element 24. The aerosol cooling element 24 is located immediately downstream of the support element 22. The aerosol cooling element 24 is longitudinally aligned with the rod 12 and the support element 22 of the aerosol-forming substrate. In the example shown in Figure 1, the upstream end of the aerosol cooling element 24 abuts the downstream end of the support element 22.

The support element 22 and the aerosol cooling element 24 together define the middle hollow section 50 of the aerosol-generating article 10.

The support element 22 includes a first hollow tubular segment 26 . In the example of Figure 1, the first hollow tubular segment 26 is provided in the form of a hollow cylindrical tube made of cellulose acetate. The first hollow tubular segment 26 defines an internal cavity 28 extending completely from the upstream end 30 of the first hollow tubular segment 26 to the downstream end 32 of the first hollow tubular segment 26. do. The internal cavity 28 is substantially empty, so that a substantially unrestricted airflow is activated along the internal cavity 28 .

In the example shown in Figure 1, the first hollow tubular segment 26 has a length of about 8 mm, an outer diameter of about 7.25 mm, and an inner diameter of about 1.9 mm. Accordingly, the thickness of the peripheral wall of the first hollow tubular segment 26 is approximately 2.67 mm.

The aerosol cooling element 24 includes a second hollow tubular segment 34 . In the example of Figure 1, the second hollow tubular segment 34 is provided in the form of a hollow cylindrical tube made of cellulose acetate. The second hollow tubular segment 34 defines an internal cavity 36 extending completely from the upstream end 38 of the hollow tubular segment to the downstream end 40 of the second hollow tubular segment 34 . The internal cavity 36 is substantially empty, so that a substantially unrestricted airflow is activated along the internal cavity 36 .

In the example shown in Figure 1, the second hollow tubular segment 34 has a length of about 8 mm, an outer diameter of about 7.25 mm, and an inner diameter of about 3.25 mm. Accordingly, the thickness of the peripheral wall of the second hollow tubular segment 34 is approximately 2 mm. Accordingly, the ratio between the inner diameter of the first hollow tubular segment 26 and the inner diameter of the second hollow tubular segment 34 is about 0.75.

The aerosol-generating article 100 has a ventilation zone 60 provided at a location along the second hollow tubular segment 34 . In the example of FIG. 1 , ventilation zone 60 is provided approximately 2 mm from the upstream end of second hollow tubular segment 34 . The ventilation level of the aerosol-generating article 100 is about 25%.

The downstream section 14 includes a mouthpiece element 42 at a position downstream of the middle hollow section 50. The mouthpiece element 42 is located immediately downstream of the aerosol cooling element 24. As shown in the diagram of Figure 1, the upstream end of the mouthpiece element 42 abuts the downstream end 40 of the aerosol cooling element 18.

In the example of Figure 1, mouthpiece element 42 is provided in the form of a cylindrical plug of low density cellulose acetate. Mouthpiece element 42 has a length of approximately 12 mm and an outer diameter of approximately 7.25 mm.

In the example of Figure 1, the rod 12 of the aerosol-forming substrate has a length of about 12 mm and a diameter of about 7.25 mm.

The aerosol-generating article 100 includes an elongated susceptor element 44 within a rod 12 of an aerosol-forming substrate. The susceptor elements 44 are arranged substantially longitudinally within the aerosol-generating substrate, for example approximately parallel to the longitudinal direction of the rods 12 of the aerosol-generating substrate. The susceptor element 44 is located at a radially central position within the rod 12 and extends effectively along the longitudinal axis of the rod 12.

The susceptor element 44 extends completely from the upstream end of the rod 12 of the aerosol-generating substrate to the downstream end. In practice, the susceptor element 44 has substantially the same length as the rod 12 of the aerosol-forming substrate.

In the example of Figure 1, the susceptor element 44 is provided in the form of a strip and has a length of about 12 mm, a thickness of about 60 μm, and a width of about 4 mm.

The upstream section 16 includes an upstream element 46. The upstream element 46 may be located immediately upstream of the rod 12 of the aerosol-forming substrate. The upstream element 46 is longitudinally aligned with the rod 12.

The downstream end of the upstream element 46 abuts the upstream end of the rod 12 of the aerosol-forming substrate. This can advantageously prevent the susceptor element 44 from falling off. Additionally, this can ensure that users cannot accidentally come into contact with the heated susceptor element 44 after use.

In the example of Figure 1, the upstream element 46 is provided in the form of a cylindrical plug of cellulose acetate. The upstream element 46 has a length of approximately 5 mm.

Aerosol-generating article 100 includes a wrapper 70. A wrapper 70 is wrapped around a rod 12 of aerosol-forming substrate. Wrapper 70 includes a metal layer. In the example of Figure 1, the metal is aluminum. In the example of Figure 1, wrapper 70 also includes a paper layer. In one example, a metal layer is deposited on a paper layer. For example, a metal layer can be deposited on a paper layer by use of vapor deposition. In another example, the metal layer is secured to the paper layer. For example, a metal layer and a paper layer can be bonded together to form a laminate.

In the example of Figure 1, the metal layer has a thickness of 40 nm and the paper layer has a thickness of 60 μm.

In some examples, wrapper 70 is wrapped around the entire circumferential surface area of rod 12 of aerosol-forming substrate.

The wrapper 70 is provided to act as a physical barrier between the rod 12 of the aerosol-forming substrate and other components of the aerosol-generating article 10.

The aerosol-generating article 100 includes an outermost wrapper 80. In the example of FIG. 1 , the outermost wrapper 80 is wrapped around all components of the aerosol-generating article 10 . The outermost wrapper 80 is also a wrapper around the wrapper 70.

Figures 2, 3, 4, 5 and 6 represent alternative examples to the example shown in Figure 1. Aerosol-generating article 200 of FIG. 2, aerosol-generating article 300 of FIG. 3, aerosol-generating article 400 of FIG. 4, aerosol-generating article 500 of FIG. 5, and aerosol-generating article 600 of FIG. 6. is the same as the aerosol-generating article 100 of FIG. 1 except for the following differences.

In the example shown in Figure 2, the wrapper 70 is wrapped around both the rod 12 and the upstream element 46 of the aerosol-forming substrate. In contrast, in the example shown in Figure 1, the wrapper 70 is wrapped only around the rod 12 of the aerosol-forming substrate.

In the example of Figure 2, wrapper 70 wraps around the entire length of upstream element 46. However, in some examples, wrapper 70 may only wrap around a portion of the length of upstream element 46.

In the example of Figure 2, the upstream element 46 is pre-wrapped with a paper element wrapper (not shown) positioned below the wrapper 70.

In the example shown in Figure 3, the wrapper 70 is wrapped around both the rod 12 and the first hollow tubular segment 26 of the aerosol-forming substrate. In contrast, in the example shown in Figure 1, the wrapper 70 is wrapped only around the rod 12 of the aerosol-forming substrate.

In the example of FIG. 3 , wrapper 70 is wrapped around the entire length of first hollow tubular segment 26 . However, in some examples, wrapper 70 may wrap only around a portion of the length of first hollow tubular segment 26.

In the example shown in FIG. 4 , the wrapper 70 is wrapped around the entire length of the upstream element 46 , the rod 12 of the aerosol-forming substrate and the first hollow tubular segment 26 . In contrast, in the example shown in Figure 1, the wrapper 70 is wrapped only around the rod 12 of the aerosol-forming substrate.

In the example of FIG. 4 , wrapper 70 is wrapped around the entire length of first hollow tubular segment 26 . However, in some examples, wrapper 70 may wrap only around a portion of the length of first hollow tubular segment 26.

In the example shown in FIG. 5 , the wrapper 70 wraps around the entire length of the upstream element 46, the rod 12 of the aerosol-forming substrate, the first hollow tubular segment 26, and the second hollow tubular segment 34. do. In contrast, in the example shown in Figure 1, the wrapper 70 is wrapped only around the rod 12 of the aerosol-forming substrate.

In the example of FIG. 5 , the wrapper 70 is wrapped around the entire length of the first hollow tubular segment 26 and the entire length of the second hollow tubular segment 34 . However, in some examples, wrapper 70 may only wrap around a portion of the length of first hollow tubular segment 26 and/or around a portion of the length of second hollow tubular segment 34.

In the example shown in FIG. 6 , wrapper 70 is wrapped around the entire length of all elements of aerosol-generating article 600 . That is, in the example of FIG. 6 , the wrapper 70 includes an upstream element 46, a rod 12 of the aerosol-forming substrate, a first hollow tubular segment 26, a second hollow tubular segment 34, and a mouthpiece element. (42) Wrapped around. In contrast, in the example shown in Figure 1, the wrapper 70 is wrapped only around the rod 12 of the aerosol-forming substrate.

In the examples of Figures 1, 2, 3, 4, 5 and 6, rod 12 is a porous medium loaded with an amount of aerosol-forming substrate. Exemplary formulations of suitable aerosol-forming substrates are shown in Table 1.

Table 1

The moisture content of Example A is 20% by weight. In this example, the water content includes all glycerin content and water content of the formulation.

The moisture content of the aerosol-forming substrate is determined according to the following method:

1. Conditioning the aerosol-forming substrate using forced air flow at a temperature of 22°C, humidity of 50% relative humidity, and pressure of 100 kPa;

2. Stop conditioning when there is no longer a change in the weight of the aerosol-forming substrate exceeding 0.2% of the total weight over three hours; and

3. Carrying out the Karl Fischer titration method on an aerosol-forming substrate:

a. extracting moisture by shaking the aerosol-forming substrate with dry methanol;

b. Injecting an aliquot of the aerosol-forming substrate into a titration vessel;

c. titrating an aliquot of the aerosol-forming substrate with pyridine-free Karl Fischer-reagent; and

d. Steps to calculate moisture content using the following formula:

Wt = moisture content (%)

Vt = volume of reagent used for titration of sample extract [ml]

B = blank value

Va = volume of aliquot of titrated sample [ml]

E = water equivalent [mgH2O/ml]

V = total volume of sample extract prepared [ml]

M = mass of test section [mg]

From this method, the moisture content in weight percent of the aerosol-forming substrate can be obtained.

Table 2

Providing a wrapper 70 wrapped around the rod 12 of the aerosol-forming substrate and comprising a metal layer may assist in incorporating one or more of the components of the aerosol-forming substrate within the rod 12. That is, the wrapper 70 may assist in reducing migration of one or more components of the aerosol-forming substrate away from the rod 12 to other parts of the aerosol-generating article 100 .

Table 2 shows the nicotine yield from rods 12 of the aerosol-forming substrate of Example A in the aerosol-generating articles of Examples 1 and 2.

The aerosol-generating article of Example 1 is a typical aerosol-generating article that does not include a wrapper with a metal layer wrapped around an aerosol-forming substrate. Instead, the wrapper within the aerosol-generating article of Example 1 is a simple paper wrapper. The aerosol-generating article of Example 2 is aerosol-generating article 100, as described above and as shown in FIG. 1.

As shown in Table 2, when the aerosol-generating article 100 does not include a wrapper 70, the nicotine yield from the plug 12 of the aerosol-forming substrate is 278 μg. However, when the aerosol-generating article 100 includes a wrapper 70, the nicotine yield from the rod 12 of the aerosol-forming substrate increases by 66% to 461 μg.

Accordingly, provision of a wrapper 70 wrapped around the rod 12 of the aerosol-forming substrate and comprising a metal layer increases the nicotine yield from the rod 12 of the aerosol-forming substrate.

The increase in nicotine yield is because the metal layer of the wrapper can prevent or at least reduce components of the aerosol-forming substrate, such as aerosol formers, from migrating out of the rod 12 and to other parts of the aerosol-generating article 100. am. The more of the aerosol-forming substrate is retained within the rod 12, the more nicotine can be obtained from the aerosol-forming substrate.

Increasing the nicotine yield from the load 12 of the aerosol-forming substrate may result in an improved user experience.

The specific examples described above illustrate, but do not limit, the invention. It should be understood that other embodiments of the invention may be made and that the specific embodiments described herein are not exhaustive.

Claims (15)

As an aerosol-generating article,
An aerosol-forming substrate comprising at least one aerosol-forming agent; and
Including wrappers,
the wrapper is wrapped around the aerosol-forming substrate,
The wrapper includes a metal layer,
An aerosol-generating article, wherein the aerosol-forming substrate has an aerosol former content of at least 40% by weight. 2. An aerosol-generating article according to claim 1, wherein the wrapper comprises a paper layer. 3. An aerosol-generating article according to claim 2, wherein the metal layer is radially inside the paper layer. 4. An aerosol-generating article according to claim 2 or 3, wherein the wrapper comprises a metal layer deposited on the paper layer. 5. An aerosol-generating article according to any one of claims 2 to 4, wherein the metal layer has a thickness of at least 2 nm. 6. An aerosol-generating article according to any preceding claim, wherein the wrapper is wrapped around the entire length of the aerosol-forming substrate. 7. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has an aerosol former content of at least 50% by weight. 8. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has an aerosol former content of at least 60% by weight. 9. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has an aerosol former content of 40% to 90% by weight. 10. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has an aerosol former content of 50% to 80% by weight. 11. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has an aerosol former content of at least 100 milligrams. 12. An aerosol-generating article according to any preceding claim, wherein the one or more aerosol formers comprise one or more of glycerin and propylene glycol. 13. An aerosol-generating article according to any preceding claim, wherein the aerosol-forming substrate has a moisture content of at least 10% by weight, measured according to the method defined herein. 14. An aerosol-generating article according to any preceding claim, comprising at least said aerosol-forming substrate and an outermost wrapper wrapped around said wrapper. 15. An aerosol-generating article according to any preceding claim comprising a susceptor element.