JP2023544038A - Aerosol forming substrate - Google Patents

Abstract

Aerosol-forming substrate (1020) for use in an aerosol-generating system (2000). Aerosol-forming substrate (1020) includes one or more aerosol formers, hydroxypropyl methylcellulose, and one or more cellulosic reinforcements. The aerosol-forming substrate (1020) has an aerosol former content of greater than 30 weight percent. The one or more cellulosic reinforcements include cellulose powder. Aerosol-forming substrate (1020) has a cellulose powder content of about 0.5 weight percent to about 50 weight percent. [Selection diagram] Figure 1

Description

The present invention relates to an aerosol-forming substrate comprising hydroxypropyl methylcellulose and one or more cellulosic reinforcements.

Aerosol generation systems for delivering an aerosol to a user typically include an atomizer configured to generate an inhalable aerosol from an aerosol-forming substrate. Some known aerosol generation systems include thermal atomizers, such as electric heaters or induction heating devices. Thermal atomizers are configured to heat and vaporize an aerosol-forming substrate to generate an aerosol. A typical aerosol-forming substrate for use in an aerosol generation system is a nicotine formulation, which can be a liquid nicotine formulation containing aerosol formers such as glycerin and/or propylene glycol.

It would be desirable to provide an aerosol-generating article having an aerosol-forming substrate that exhibits increased tensile strength.

It would be desirable to provide an aerosol-generating article having an aerosol-forming substrate that has a reduced tendency to melt and form a crust on a portion of the aerosol-generating article or a portion of an aerosol-generating system.

An aerosol-forming substrate is provided for use in an aerosol generation system. The aerosol-forming substrate may include one or more aerosol formers. The aerosol-forming substrate may include hydroxypropyl methylcellulose. The aerosol-forming substrate may include one or more cellulosic reinforcements.

An aerosol-forming substrate for use in an aerosol generation system is also provided, the aerosol-forming substrate comprising one or more aerosol formers, hydroxypropyl methyl cellulose, and one or more cellulosic reinforcements.

Aerosol generating articles are also provided for use in aerosol generating systems. The aerosol-generating article may include an aerosol-forming substrate. The aerosol-forming substrate may include one or more aerosol formers. The aerosol-forming substrate may include hydroxypropyl methylcellulose. The aerosol-forming substrate may include one or more cellulosic reinforcements.

Also provided are aerosol-generating articles that include an aerosol-forming substrate that includes one or more aerosol formers, hydroxypropyl methylcellulose, and one or more cellulosic reinforcements.

Aerosol generation systems are also provided, including an aerosol generation device and an aerosol generation article. The aerosol-generating article may include an aerosol-forming substrate. The aerosol-forming substrate may include one or more aerosol formers. The aerosol-forming substrate may include hydroxypropyl methylcellulose. The aerosol-forming substrate may include one or more cellulosic reinforcements.

An aerosol generation system is also provided that includes an aerosol generation device and an aerosol generation article including an aerosol forming substrate, the aerosol forming substrate comprising one or more aerosol formers, hydroxypropyl methylcellulose, and one or more cellulosic reinforcements. include.

As used herein, the term "aerosol generating article" refers to an article for producing an aerosol. Aerosol-generating articles typically include an aerosol-forming substrate that is suitable and intended to be heated or combusted to release volatile compounds capable of forming an aerosol. Traditional cigarettes are lit when a user applies a flame to one end of the cigarette and draws air through the other end. The localized heat provided by the flame and the oxygen in the air drawn through the cigarette ignites the end of the cigarette and the resulting combustion produces inhalable smoke. In contrast, in a "heated aerosol-generating article," an aerosol is generated by heating the aerosol-forming substrate rather than 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 that can form an aerosol. Aerosols generated from an aerosol-forming substrate may or may not be visible to the human eye, and may include vapor (e.g., gaseous particles of a substance that is normally liquid or solid at room temperature), as well as condensed vapor gas. and droplets.

Aerosol-forming substrates comprising a combination of hydroxypropyl methylcellulose and cellulosic reinforcement can have many advantages.

Including hydroxypropyl methylcellulose in an aerosol-forming substrate may help improve the manufacturing process of the aerosol-forming substrate. For example, hydroxypropyl methylcellulose can reduce the overall viscosity of a slurry that is mixed in making an aerosol-forming substrate. Low viscosity slurries may flow more easily compared to conventional slurries, and low viscosity slurries are easier to mix, move, and handle during the manufacturing process.

Including a cellulosic reinforcement in an aerosol-forming substrate can increase the tensile strength of the aerosol-forming substrate. Aerosol-forming substrates with higher tensile strength may be less likely to degrade or break, eg, during shipping or manufacturing processes.

Despite the above-mentioned advantages, the inventors have discovered that aerosol-forming substrates containing hydroxypropyl methylcellulose may not have sufficient tensile strength. However, the use of cellulosic reinforcements to increase the tensile strength of aerosol-forming substrates overcomes the reduction in tensile strength caused by the inclusion of hydroxypropyl methylcellulose, while also addressing the above-mentioned processing problems associated with hydroxypropyl methylcellulose. can provide the following advantages.

The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of greater than about 0.5 weight percent. Advantageously, the inventors have discovered that hydroxypropyl methylcellulose can be an effective binder for aerosol-forming substrates.

The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of greater than about 1 weight percent. The aerosol-forming substrate may have a hydroxypropyl methyl cellulose content of greater than about 5 weight percent. The aerosol-forming substrate may have a hydroxypropyl methyl cellulose content of greater than about 10 weight percent. The aerosol-forming substrate may have a hydroxypropyl methyl cellulose content of greater than about 15 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of greater than about 20 weight percent.

The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 50 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 45 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 40 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 35 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 30 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 25 weight percent. The aerosol-forming substrate may have a hydroxypropyl methylcellulose content of less than about 20 weight percent.

The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a hydroxypropyl methyl cellulose content of about 0.5 weight percent to about 25 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 20 weight percent.

The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 15 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methyl cellulose content of about 20 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methyl cellulose content of about 25 weight percent to about 40 weight percent.

The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 45 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 35 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 10 weight percent to about 30 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 15 weight percent to about 30 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 15 weight percent to about 25 weight percent. The aerosol-forming substrate can have a hydroxypropyl methylcellulose content of about 20 weight percent to about 25 weight percent.

The hydroxypropyl methylcellulose may be a low viscosity hydroxypropyl methylcellulose. For example, hydroxypropyl methylcellulose may have a viscosity of 0.05 Pa/s. In some examples, hydroxypropyl methylcellulose can have a viscosity of 0.015 Pa/s. In some examples, hydroxypropyl methylcellulose can have a viscosity of 0.015 Pa/s to 0.05 Pa/s.

Advantageously, the inventors have discovered that using low viscosity hydroxypropyl methylcellulose can provide benefits during the manufacturing process. The use of low viscosity hydroxypropyl methylcellulose can form a low viscosity slurry, which is easy to mix and move during manufacturing and processing.

The aerosol-forming substrate may have a cellulosic reinforcement content of greater than about 0.5 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of greater than about 1 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of greater than about 5 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of greater than about 10 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content greater than about 15 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of greater than about 20 weight percent.

The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 50 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 45 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 40 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 35 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 30 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 25 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 20 weight percent. The aerosol-forming substrate may have a cellulosic reinforcement content of less than about 15 weight percent.

The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 0.5 weight percent to about 5 weight percent.

The aerosol-forming substrate can have a cellulosic reinforcement content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 10 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 15 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 20 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 25 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 30 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 35 weight percent to about 40 weight percent.

The aerosol-forming substrate can have a cellulosic reinforcement content of about 1 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 10 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 10 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 15 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulosic reinforcement content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include cellulose fibers. Advantageously, the inventors have discovered that cellulose fibers can be a cellulosic reinforcement that is particularly effective in increasing the tensile strength of an aerosol-forming substrate.

The aerosol-forming substrate may have a cellulose fiber content of greater than about 0.5 weight percent. The aerosol-forming substrate may have a cellulose fiber content of greater than about 1 weight percent. The aerosol-forming substrate may have a cellulose fiber content of greater than about 5 weight percent. The aerosol-forming substrate may have a cellulose fiber content of greater than about 10 weight percent. The aerosol-forming substrate may have a cellulose fiber content of greater than about 15 weight percent. The aerosol-forming substrate may have a cellulose fiber content of greater than about 20 weight percent.

The aerosol-forming substrate may have a cellulose fiber content of less than about 50 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 45 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 40 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 35 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 30 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 25 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 20 weight percent. The aerosol-forming substrate may have a cellulose fiber content of less than about 15 weight percent.

The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 0.5 weight percent to about 5 weight percent.

The aerosol-forming substrate can have a cellulose fiber content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 10 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 15 weight percent to about 40 weight percent. The aerosol-forming substrate may have a cellulose fiber content between about 20 weight percent and about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 25 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 30 weight percent to about 40 weight percent. The aerosol-forming substrate may have a cellulose fiber content of about 35 weight percent to about 40 weight percent.

The aerosol-forming substrate may have a cellulose fiber content of about 1 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 10 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 10 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 15 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose fiber content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include microcrystalline cellulose. Advantageously, the inventors have discovered that microcrystalline cellulose can be a cellulosic reinforcement agent that is particularly effective in increasing the tensile strength of aerosol-forming substrates.

The aerosol-forming substrate may have a microcrystalline cellulose content of greater than about 0.5 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of greater than about 1 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of greater than about 5 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of greater than about 10 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content greater than about 15 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of greater than about 20 weight percent.

The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 50 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 45 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 40 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 35 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 30 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 25 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 20 weight percent. The aerosol-forming substrate may have a microcrystalline cellulose content of less than about 15 weight percent.

The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 25 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 0.5 weight percent to about 5 weight percent.

The aerosol-forming substrate can have a microcrystalline cellulose content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 10 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 15 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 20 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 25 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 30 weight percent to about 40 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 35 weight percent to about 40 weight percent.

The aerosol-forming substrate can have a microcrystalline cellulose content of about 1 weight percent to about 35 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 10 weight percent to about 30 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 10 weight percent to about 25 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 15 weight percent to about 25 weight percent. The aerosol-forming substrate can have a microcrystalline cellulose content of about 15 weight percent to about 20 weight percent.

The one or more cellulosic reinforcements may include cellulose powder. Advantageously, the inventors have discovered that cellulose powder can be a cellulosic reinforcement agent that is particularly effective in increasing the tensile strength of aerosol-forming substrates.

The aerosol-forming substrate may have a cellulose powder content of greater than about 0.5 weight percent. The aerosol-forming substrate may have a cellulose powder content of greater than about 1 weight percent. The aerosol-forming substrate may have a cellulose powder content of greater than about 5 weight percent. The aerosol-forming substrate may have a cellulose powder content of greater than about 10 weight percent. The aerosol-forming substrate may have a cellulose powder content of greater than about 15 weight percent. The aerosol-forming substrate may have a cellulose powder content of greater than about 20 weight percent.

The aerosol-forming substrate may have a cellulose powder content of less than about 50 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 45 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 40 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 35 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 30 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 25 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 20 weight percent. The aerosol-forming substrate may have a cellulose powder content of less than about 15 weight percent.

The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 45 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 0.5 weight percent to about 5 weight percent.

The aerosol-forming substrate can have a cellulose powder content of about 1 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 5 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 10 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 15 weight percent to about 40 weight percent. The aerosol-forming substrate may have a cellulose powder content of about 20 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 25 weight percent to about 40 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 30 weight percent to about 40 weight percent. The aerosol-forming substrate may have a cellulose powder content of about 35 weight percent to about 40 weight percent.

The aerosol-forming substrate may have a cellulose powder content of about 1 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 5 weight percent to about 35 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 5 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 10 weight percent to about 30 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 10 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 15 weight percent to about 25 weight percent. The aerosol-forming substrate can have a cellulose powder content of about 15 weight percent to about 20 weight percent.

The aerosol-forming substrate may include carboxymethyl cellulose. Advantageously, using carboxymethylcellulose may help reduce crusting of the aerosol-forming substrate when used in aerosol-generating articles. In some instances, the use of carboxymethylcellulose eliminates crusting. As explained below, crusting is the formation of a solid layer on the components of an aerosol-generating article. The inventors have discovered that crusting can occur because the components of the aerosol-forming substrate can melt and then resolidify around the components of the aerosol-generating article. Crusting can be a particular problem when the aerosol-forming substrate is used in an aerosol-generating article containing a susceptor. If a crust forms on the susceptor, the susceptor with the crust becomes less effective in heating the aerosol-forming substrate, which may result in reduced delivery of nicotine to the user and/or the formation of aerosol from the aerosol-forming substrate. can result in a decrease in

Carboxymethylcellulose may include sodium carboxymethylcellulose. Advantageously, the inventors have discovered that sodium carboxymethylcellulose is a carboxymethylcellulose that may be particularly effective in preventing the crusting problems mentioned above.

The aerosol-forming substrate may have a carboxymethyl cellulose content greater than about 0.5 weight percent. The aerosol-forming substrate may have a carboxymethylcellulose content of greater than about 1 weight percent. The aerosol-forming substrate may have a carboxymethylcellulose content of greater than about 5 weight percent. The aerosol-forming substrate may have a carboxymethylcellulose content of greater than about 10 weight percent.

The aerosol-forming substrate may have a carboxymethylcellulose content of less than about 20 weight percent. The aerosol-forming substrate may have a carboxymethylcellulose content of less than about 15 weight percent. The aerosol-forming substrate may have a carboxymethyl cellulose content of less than about 10 weight percent. The aerosol-forming substrate may have a carboxymethylcellulose content of less than about 8 weight percent. The aerosol-forming substrate may have a carboxymethyl cellulose content of less than about 5 weight percent.

The aerosol-forming substrate can have a carboxymethylcellulose content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 0.5 weight percent to about 8 weight percent. The aerosol-forming substrate can have a carboxymethyl cellulose content of about 0.5 weight percent to about 5 weight percent.

The aerosol-forming substrate can have a carboxymethylcellulose content of about 1 weight percent to about 20 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 5 weight percent to about 20 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 8 weight percent to about 20 weight percent. The aerosol-forming substrate can have a carboxymethyl cellulose content of about 10 weight percent to about 20 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 15 weight percent to about 20 weight percent.

The aerosol-forming substrate can have a carboxymethylcellulose content of about 1 weight percent to about 15 weight percent. The aerosol-forming substrate can have a carboxymethyl cellulose content of about 1 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxymethylcellulose content of about 5 weight percent to about 8 weight percent.

The aerosol-forming substrate may include nicotine.

Nicotine may include one or more nicotine salts. The one or more nicotine salts may be selected from the list consisting of nicotine lactate, nicotine citrate, nicotine pyruvate, nicotine bitartrate, nicotine benzoate, nicotine pectate, nicotine alginate, and nicotine salicylate.

The nicotine may include tobacco extract.

The aerosol-forming substrate may have a nicotine content greater than about 0.5 weight percent. The aerosol-forming substrate may have a nicotine content greater than about 1 weight percent. The aerosol-forming substrate may have a nicotine content of greater than about 2 weight percent. The aerosol-forming substrate may have a nicotine content greater than about 3 weight percent. The aerosol-forming substrate may have a nicotine content greater than about 5 weight percent. The aerosol-forming substrate may have a nicotine content greater than about 8 weight percent.

The aerosol-forming substrate may have a nicotine content of less than about 10 weight percent. The aerosol-forming substrate may have a nicotine content of less than about 8 weight percent. The aerosol-forming substrate may have a nicotine content of less than about 5 weight percent. The aerosol-forming substrate may have a nicotine content of less than about 3 weight percent. The aerosol-forming substrate may have a nicotine content of less than about 2 weight percent. The aerosol-forming substrate may have a nicotine content of less than about 1 weight percent.

The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 8 weight percent. The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 5 weight percent. The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 3 weight percent. The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 2 weight percent. The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 1 weight percent.

The aerosol-forming substrate may have a nicotine content of about 1 weight percent to about 5 weight percent. The aerosol-forming substrate may have a nicotine content of about 2 weight percent to about 5 weight percent. The aerosol-forming substrate may have a nicotine content of about 3 weight percent to about 5 weight percent.

The aerosol-forming substrate may have a nicotine content of about 0.5 weight percent to about 4 weight percent. The aerosol-forming substrate may have a nicotine content of about 1 weight percent to about 4 weight percent. The aerosol-forming substrate may have a nicotine content of about 1 weight percent to about 3 weight percent. The aerosol-forming substrate may have a nicotine content of about 1 weight percent to about 2 weight percent.

The aerosol-forming substrate may include one or more carboxylic acids. Advantageously, including one or more carboxylic acids in the aerosol-forming substrate can produce a nicotine salt.

The one or more carboxylic acids include one or more of lactic acid and levulinic acid. Advantageously, the inventors have discovered that lactic acid and levulinic acid are particularly good carboxylic acids for producing nicotine salts.

The aerosol-forming substrate may have a carboxylic acid content greater than about 0.5 weight percent. The aerosol-forming substrate may have a carboxylic acid content of greater than about 1 weight percent. The aerosol-forming substrate may have a carboxylic acid content of greater than about 2 weight percent. The aerosol-forming substrate may have a carboxylic acid content of greater than about 3 weight percent. The aerosol-forming substrate may have a carboxylic acid content greater than about 5 weight percent. The aerosol-forming substrate may have a carboxylic acid content greater than about 8 weight percent. The aerosol-forming substrate may have a carboxylic acid content of greater than about 10 weight percent. The aerosol-forming substrate may have a carboxylic acid content greater than about 15 weight percent.

The aerosol-forming substrate may have a carboxylic acid content of less than about 20 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 15 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 10 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 8 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 5 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 3 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 2 weight percent. The aerosol-forming substrate may have a carboxylic acid content of less than about 1 weight percent.

The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 15 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 10 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 8 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 5 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 3 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 2 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 0.5 weight percent to about 1 weight percent.

The aerosol-forming substrate can have a carboxylic acid content of about 1 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxylic acid content of about 2 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxylic acid content of about 3 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxylic acid content of about 5 weight percent to about 10 weight percent. The aerosol-forming substrate can have a carboxylic acid content of about 8 weight percent to about 10 weight percent.

The aerosol-forming substrate may have a carboxylic acid content of about 1 weight percent to about 20 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 1 weight percent to about 15 weight percent. The aerosol-forming substrate can have a carboxylic acid content of about 1 weight percent to about 10 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 1 weight percent to about 8 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 2 weight percent to about 5 weight percent. The aerosol-forming substrate may have a carboxylic acid content of about 3 weight percent to about 5 weight percent.

The aerosol-forming substrate may include one or more aerosol formers. Advantageously, aerosol formation is improved by including one or more aerosol formers in the aerosol forming substrate.

The one or more aerosol formers may include glycerin. The one or more aerosol formers may include propylene glycol. The one or more aerosol formers may include a combination of glycerin and propylene glycol.

The aerosol-forming substrate may have an aerosol former content of greater than about 0.5 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 10 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 20 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 30 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 40 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 50 weight percent. The aerosol-forming substrate may have an aerosol former content of greater than about 60 weight percent.

The aerosol-forming substrate can have an aerosol former content of less than about 80 weight percent. The aerosol-forming substrate can have an aerosol former content of less than about 70 weight percent. The aerosol-forming substrate can have an aerosol former content of less than about 60 weight percent.

The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 70 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 60 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 40 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 30 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 20 weight percent. The aerosol-forming substrate may have an aerosol former content of about 0.5 weight percent to about 10 weight percent.

The aerosol-forming substrate may have an aerosol former content of about 1 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 10 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 20 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 30 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 40 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 50 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 60 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 70 weight percent to about 80 weight percent.

The aerosol-forming substrate may have an aerosol former content of about 20 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 30 weight percent to about 80 weight percent. The aerosol-forming substrate may have an aerosol former content of about 30 weight percent to about 70 weight percent. The aerosol-forming substrate may have an aerosol former content of about 40 weight percent to about 70 weight percent. The aerosol-forming substrate may have an aerosol former content of about 40 weight percent to about 60 weight percent. The aerosol-forming substrate may have an aerosol former content of about 50 weight percent to about 60 weight percent.

The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 1 or more. The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 1.25 or more. The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 1.5 or more.

The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 1 or less. The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 0.75 or less. The ratio of the weight percent hydroxypropyl methylcellulose content to the weight percent cellulosic reinforcement content of the aerosol-forming substrate may be about 0.5 or less.

The aerosol-generating article may include an aerosol-forming substrate.

The aerosol generating article may include a hollow cellulose acetate tube.

The aerosol generating article may include a spacer element.

The aerosol generating article may include a mouthpiece filter.

The aerosol-forming substrate, hollow cellulose acetate tube, spacer element, and mouthpiece filter may be arranged in sequence. The aerosol-forming substrate, hollow cellulose acetate tube, spacer element, and mouthpiece filter may be arranged in coaxial alignment.

The aerosol generating article may include tobacco paper.

The aerosol-forming substrate, hollow cellulose acetate tube, spacer element, and mouthpiece filter may be assembled by tobacco paper.

The aerosol generating article can have an oral end and a distal end 1013. In use, the user may insert the proximal end into the mouth.

The aerosol-generating article may be particularly suitable for use in an electrically operated aerosol-generating device that includes a heater for heating the aerosol-generating substrate.

The aerosol-forming substrate may be provided in the form of a plug.

The aerosol generating article may include a susceptor.

The susceptor may be a plurality of susceptor particles that may be deposited on or embedded within the aerosol-forming substrate. The susceptor particles may be immobilized by the aerosol-forming substrate and remain in the initial position. The susceptor particles may be uniformly dispersed within the aerosol-forming substrate. Due to the nature of the particles in the susceptor, heat can be generated according to the distribution of the particles within the aerosol-forming substrate. Alternatively, the susceptor may be in the form of one or more sheets, strips, pieces or rods that can be placed next to or embedded in the aerosol-forming substrate. The aerosol-forming substrate may include one or more susceptor strips.

The aerosol generating device may include a housing defining a device cavity configured to receive at least a portion of the aerosol generating article.

The aerosol generation device may include an atomizer configured to generate an aerosol from an aerosol-forming substrate.

The atomizer may be a thermal atomizer.

As used herein, the term "thermal atomizer" describes an atomizer that is configured to heat an aerosol-forming substrate to generate an aerosol.

The aerosol generator may include any suitable type of thermal atomizer. For example, a thermal atomizer may include a heater. Thermal atomizers may be equipped with an electric heater. In one example, a thermal atomizer may include an electric heater that includes a heating element. The heating element may be a resistive heating element. In one example, the heating element may include a heater blade or pin adapted to be inserted into the aerosol-forming substrate such that the aerosol-forming substrate is heated from within. In another example, the heating element may partially or completely surround the aerosol-forming substrate and externally heat the aerosol-forming substrate in a circumferential direction.

In another example, a thermal atomizer may include an induction heating device. Induction heating devices typically include an induction source configured to be coupled to a susceptor, which may be provided to the exterior of the aerosol-forming substrate or to the interior of the aerosol-forming substrate. The inductive source generates an alternating electromagnetic field, which induces magnetization or eddy currents in the susceptor. The susceptor may be heated as a result of hysteresis losses or induced eddy currents, which heat the susceptor through ohmic or resistive heating.

The aerosol generator may further include a susceptor. The susceptor may be as described above in connection with the aerosol generating article.

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

Examples of electrically operated aerosol generation systems having an aerosol generation article with an induction heating device and a susceptor are described in WO-A1-95/27411 and WO-A1-2015/177255.

The aerosol generator may include a battery and a control device.

Further provided is an aerosol generation system including an aerosol-forming substrate according to the invention and an atomizer configured to generate an aerosol from the aerosol-forming substrate.

The atomizer may be a thermal atomizer.

The aerosol generation system may include any suitable type of thermal atomizer. For example, a thermal atomizer may include a heater. Thermal atomizers may be equipped with an electric heater. In one example, a thermal atomizer may include an electric heater that includes a heating element. The heating element may be a resistive heating element. In one example, the heating element may include a heater blade or pin adapted to be inserted into the aerosol-forming substrate such that the aerosol-forming substrate is heated from within. In another example, the heating element may partially or completely surround the aerosol-forming substrate and externally heat the aerosol-forming substrate in a circumferential direction.

In another example, a thermal atomizer may include an induction heating device. Induction heating devices typically include an induction source configured to be coupled to a susceptor, which may be provided to the exterior of the aerosol-forming substrate or to the interior of the aerosol-forming substrate. The inductive source generates an alternating electromagnetic field, which induces magnetization or eddy currents in the susceptor. The susceptor may be heated as a result of hysteresis losses or induced eddy currents, which heat the susceptor through ohmic or resistive heating.

The aerosol generation system may include a susceptor. The susceptor may be as described above in connection with the aerosol generating article.

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

Examples of electrically operated aerosol generation systems having an aerosol generation article with an induction heating device and a susceptor are described in WO-A1-95/27411 and WO-A1-2015/177255.

The aerosol generation system may include a battery and a controller.

For the avoidance of doubt, the features described above with respect to aerosol-forming substrates may also relate to aerosol-generating articles, aerosol-generating devices and aerosol-generating systems, where appropriate. Similarly, the features described above with respect to aerosol-generating articles may also relate to aerosol-generating devices and aerosol-generating systems, and vice versa, where appropriate.

It will be appreciated that any feature described herein in connection with an embodiment of an aerosol-forming substrate, aerosol-generating article, aerosol-generating device, or aerosol-generating system may be used in conjunction with an aerosol-forming substrate, aerosol-generating article, or aerosol-generating system according to the present disclosure. Other embodiments of articles, aerosol generation devices, or aerosol generation systems may also be applied. Features described in connection with one embodiment may equally apply to another embodiment in accordance with this disclosure. Of course, an aerosol generator according to the present disclosure may be provided in an aerosol generation device without a cartridge. Accordingly, any of the features described herein in relation to a cartridge may equally apply to an aerosol generating device.

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

Example 1
An aerosol-forming substrate for use in an aerosol generation system, the substrate comprising:
one or more aerosol formers;
hydroxypropyl methylcellulose,
an aerosol-forming substrate comprising one or more cellulosic reinforcements.
Example 2
The aerosol-forming substrate of Example 1, wherein the aerosol-forming substrate has a hydroxypropylmethylcellulose content of greater than about 0.5 weight percent.
Example 3
The aerosol-forming substrate of Example 2, wherein the aerosol-forming substrate has a hydroxypropylmethylcellulose content of about 0.5 weight percent to about 50 weight percent.
Example 4
The aerosol-forming substrate of Example 3, wherein the aerosol-forming substrate has a hydroxypropylmethylcellulose content of about 10 weight percent to about 40 weight percent.
Example 5
The aerosol-forming substrate of Example 4, wherein the aerosol-forming substrate has a hydroxypropylmethylcellulose content of about 15 weight percent to about 30 weight percent.
Example 6
The aerosol-forming substrate of Example 5, wherein the aerosol-forming substrate has a hydroxypropylmethylcellulose content of about 20 weight percent to about 25 weight percent.
Example 7
The aerosol-forming substrate of any one of Examples 1-6, wherein the aerosol-forming substrate has a cellulosic reinforcement content of greater than about 0.5 weight percent.
Example 8
The aerosol-forming substrate of Example 7, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 0.5 weight percent to about 50 weight percent.
Example 9
The aerosol-forming substrate of Example 8, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 0.5 weight percent to about 40 weight percent.
Example 10
The aerosol-forming substrate of Example 9, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 5 weight percent to about 30 weight percent.
Example 11
The aerosol-forming substrate of Example 10, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 10 weight percent to about 20 weight percent.
Example 12
The aerosol-forming substrate of Example 11, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 15 weight percent to about 20 weight percent.
Example 13
The aerosol-forming substrate according to one of Examples 1-12, wherein the one or more cellulosic reinforcements comprise cellulose fibers.
Example 14
The aerosol-forming substrate of Example 13, wherein the aerosol-forming substrate has a cellulose fiber content of greater than about 0.5 weight percent.
Example 15
The aerosol-forming substrate of Example 14, wherein the aerosol-forming substrate has a cellulose fiber content of about 0.5 weight percent to about 50 weight percent.
Example 16
The aerosol-forming substrate of Example 15, wherein the aerosol-forming substrate has a cellulose fiber content of about 0.5 weight percent to about 40 weight percent.
Example 17
The aerosol-forming substrate of Example 16, wherein the aerosol-forming substrate has a cellulose fiber content of about 5 weight percent to about 30 weight percent.
Example 18
The aerosol-forming substrate of Example 17, wherein the aerosol-forming substrate has a cellulose fiber content of about 10 weight percent to about 20 weight percent.
Example 19
The aerosol-forming substrate of Example 18, wherein the aerosol-forming substrate has a cellulose fiber content of about 15 weight percent to about 20 weight percent.
Example 20
The aerosol-forming substrate according to one of Examples 1-19, wherein the one or more cellulosic reinforcement comprises microcrystalline cellulose.
Example 21
The aerosol-forming substrate of Example 20, wherein the aerosol-forming substrate has a microcrystalline cellulose content of greater than about 0.5 weight percent.
Example 22
The aerosol-forming substrate of Example 21, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 0.5 weight percent to about 50 weight percent.
Example 23
The aerosol-forming substrate of Example 22, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 0.5 weight percent to about 40 weight percent.
Example 24
The aerosol-forming substrate of Example 23, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 5 weight percent to about 30 weight percent.
Example 25
The aerosol-forming substrate of Example 18, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 10 weight percent to about 20 weight percent.
Example 26
The aerosol-forming substrate of Example 24, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 15 weight percent to about 20 weight percent.
Example 27
The aerosol-forming substrate of any one of Examples 1-26, wherein the one or more cellulosic reinforcement comprises cellulose powder.
Example 28
The aerosol-forming substrate of Example 27, wherein the aerosol-forming substrate has a cellulose powder content of greater than about 0.5 weight percent.
Example 29
The aerosol-forming substrate of Example 28, wherein the aerosol-forming substrate has a cellulose powder content of about 0.5 weight percent to about 50 weight percent.
Example 30
The aerosol-forming substrate of Example 29, wherein the aerosol-forming substrate has a cellulose powder content of about 0.5 weight percent to about 40 weight percent.
Example 31
The aerosol-forming substrate of Example 30, wherein the aerosol-forming substrate has a cellulose powder content of about 5 weight percent to about 30 weight percent.
Example 32
The aerosol-forming substrate of Example 31, wherein the aerosol-forming substrate has a cellulose powder content of about 10 weight percent to about 20 weight percent.
Example 33
The aerosol-forming substrate of Example 32, wherein the aerosol-forming substrate has a cellulose powder content of about 15 weight percent to about 20 weight percent.
Example 34
The aerosol-forming substrate according to any one of Examples 1-33, wherein the aerosol-forming substrate comprises carboxymethyl cellulose.
Example 35
The aerosol-forming substrate of Example 34, wherein the aerosol-forming substrate has a carboxymethyl cellulose content of greater than about 0.5 weight percent.
Example 36
The aerosol-forming substrate of Example 35, wherein the aerosol-forming substrate has a carboxymethyl cellulose content of about 0.5 weight percent to about 20 weight percent.
Example 37
The aerosol-forming substrate of Example 36, wherein the aerosol-forming substrate has a carboxymethylcellulose content of about 0.5 weight percent to about 15 weight percent.
Example 38
The aerosol-forming substrate of Example 37, wherein the aerosol-forming substrate has a carboxymethyl cellulose content of about 5 weight percent to about 10 weight percent.
Example 39
The aerosol-forming substrate of Example 38, wherein the aerosol-forming substrate has a carboxymethyl cellulose content of about 5 weight percent to about 7 weight percent.
Example 40
The aerosol-forming substrate according to any one of Examples 28-39, wherein the carboxymethylcellulose comprises sodium carboxymethylcellulose.
Example 41
The aerosol-forming substrate according to any one of Examples 1-40, wherein the aerosol-forming substrate comprises nicotine.
Example 42
The aerosol-forming substrate of Example 41, wherein the aerosol-forming substrate has a nicotine content greater than about 0.5 weight percent.
Example 43
The aerosol-forming substrate of Example 42, wherein the aerosol-forming substrate has a nicotine content of about 0.5 weight percent to about 5 weight percent.
Example 44
The aerosol-forming substrate of any one of Examples 1-43, wherein the aerosol-forming substrate comprises one or more carboxylic acids.
Example 45
The aerosol-forming substrate of Example 44, wherein the one or more carboxylic acids include one or more of lactic acid and levulinic acid.
Example 46
An aerosol-generating article comprising the aerosol-forming substrate of any one of Examples 1-45.
Example 42
An aerosol generation system, comprising:
an aerosol generator;
and an aerosol-generating article as described in Example 46.

Specific embodiments will be further described, by way of example only, with reference to the accompanying drawings in which: FIG.

FIG. 1 shows an example of an aerosol-generating article containing an aerosol-forming substrate as described herein. FIG. 2 shows an example of an aerosol generation system that includes an aerosol generation device and the aerosol generation article shown in FIG.

Aerosol generation systems for delivering an aerosol to a user typically include an atomizer configured to generate an inhalable aerosol from an aerosol-forming substrate. Some known aerosol generation systems include thermal atomizers, such as electric heaters or induction heating devices. Thermal atomizers are configured to heat and vaporize an aerosol-forming substrate to generate an aerosol. A typical aerosol-forming substrate for use in an aerosol generation system is a nicotine formulation, which can be a liquid nicotine formulation containing aerosol formers such as glycerin and/or propylene glycol.

Some aerosol-forming substrates have low tensile strength. This means that such aerosol-forming substrates may degrade or degrade before the aerosol-generating article is used by a user, which is undesirable. Some aerosol-forming substrates have a tendency to melt, which can cause a crust to form on a portion of the aerosol-generating article. A crust formed on a portion of an aerosol-generating article can reduce the level of nicotine delivered to the user. A crust that forms on a portion of an aerosol-generating article can reduce the volume of aerosol generated by the aerosol-generating system.

For example, as described above, in an aerosol generation system that includes an induction heating device, the aerosol generation article may include a susceptor that can be heated by the induction source. Heat from the susceptor is then transferred to the aerosol forming substrate. The components of the aerosol-forming substrate may then be vaporized to produce an aerosol. However, if the susceptor is coated with a crust of an aerosol-forming substrate, the crust can reduce heat transfer from the heated susceptor to the aerosol-forming substrate. Reducing heat transfer from the heated susceptor to the aerosol-forming substrate may reduce the level of nicotine delivered to the user. Reducing heat transfer from the heated susceptor to the aerosol-forming substrate can reduce the volume of aerosol generated by the aerosol generation system.

Therefore, it is desirable to provide an aerosol-forming substrate with increased tensile strength. It would also be desirable to provide an aerosol-forming substrate with a reduced tendency to melt, which may reduce the effect of crusting of the aerosol-forming substrate on the components of the aerosol-generating article.

FIG. 1 shows an example of an aerosol-generating article 1000 containing an aerosol-forming substrate as described herein.

In the example of FIG. 1, aerosol-generating article 1000 includes four elements: aerosol-forming substrate 1020, hollow cellulose acetate tube 1030, spacer element 1040, and mouthpiece filter 1050. The four elements 1020, 1030, 1040, 1050 are arranged sequentially and in coaxial alignment. Four elements 1020, 1030, 1040, 1050 are assembled with tobacco paper 1060 to form aerosol generating article 1000.

In the example of FIG. 1, aerosol generating article 1000 has an oral end 1012 and a distal end 1013. A user may insert oral end 1012 into the mouth during use. Distal end 1013 is located at the opposite end of aerosol generating article 1000 from mouth end 1012. The example aerosol generating article 1000 illustrated in FIG. 1 is particularly suitable for use in an electrically operated aerosol generating device that includes a heater for heating an aerosol generating substrate.

In one example, when assembled, aerosol generating article 1000 is approximately 45 millimeters long and has an outer diameter of about 7.2 millimeters and an inner diameter of about 6.9 millimeters.

In the example of FIG. 1, aerosol-forming substrate 1020 is provided in the form of a plug made by crimping a sheet of aerosol-forming substrate. Some examples of aerosol-forming substrates 1020 are shown in Table 1 below. The sheets are assembled, crimped, and wrapped with filter paper (not shown) to form a plug.

The aerosol generating article 1000 illustrated in FIG. 1 is designed to engage an aerosol generating device for consumption. Such aerosol generating devices include means for heating the aerosol-forming substrate 1020 to a sufficient temperature to form an aerosol. Generally, an aerosol generating device may include a heating element surrounding the aerosol generating article 1000 adjacent to the aerosol forming substrate 1020 or a heating element inserted into the aerosol forming substrate 1020.

When mated with the aerosol generator, the user inhales on the mouth end 1012 of the smoking article 1000 and the aerosol-forming substrate 1020 is heated to a temperature of approximately 375°C. At this temperature, volatile compounds are released from the aerosol-forming substrate 1020. These compounds condense to form an aerosol. The aerosol is drawn through filter 1050 and enters the user's mouth.

FIG. 2 shows a portion of an electrically operated aerosol generation system 2000. The aerosol generation system utilizes a heating blade 2100 to heat the aerosol generation substrate 1020 of the aerosol generation article 1000. In the example of FIG. 2, heating blade 2100 is mounted within an aerosol article receiving chamber of an electrically operated aerosol generator 2010. Aerosol generating device 2010 defines a plurality of air holes 2050 for allowing air to flow into aerosol generating article 1000. Airflow is indicated by arrows in FIG. Aerosol generator 2010 includes a power source and electronic components, which are not shown in FIG. The aerosol generating article 1000 of FIG. 2 is as described with respect to FIG.

表１ Exemplary formulations of aerosol-forming substrates according to the invention (Examples A, B, C, D and E) were prepared having the compositions shown in Table 1.

Table 1

The aerosol-forming substrates of Examples A, B, C, D and E were:
(1) mixing the ingredients with water using heat and agitation to form a slurry;
(2) casting a layer of slurry on a flat surface to form a film having a thickness of about 210 micrometers;
(3) leaving the film on a flat surface to solidify;
(3) Prepared by drying the film by heating the film to about 140° C. for about 8 minutes.

The aerosol-forming substrate obtained after drying is solid. In other words, each aerosol-forming substrate has a stable size and shape and does not flow. The term "stable" is used herein to indicate that the aerosol-forming substrate substantially maintains its shape and mass when exposed to various environmental conditions. As such, the aerosol-forming substrate does not release or absorb substantially water when exposed to standard temperatures and pressures while varying relative humidity from about 10 percent to about 60 percent.

This is particularly advantageous as it ensures that the aerosol-forming substrate according to the invention does not release a liquid phase during storage or transport (eg from a manufacturing facility to a point of sale).

In use in the aerosol generator described above, the aerosol-forming substrates of Examples A, B, C, D, and E are heated to a temperature of between about 375 degrees Celsius. The nicotine and glycerin contained within the film evaporate. Nicotine and glycerin condense to form an inhalable aerosol. The aerosol can then be inhaled by the user. The aerosol-forming substrate contracts slightly and its volume decreases. However, the film remains solid and maintains its film morphology. The aerosol-forming substrate appears slightly hardened and takes on a dark, brownish color.

The aerosol-forming substrate of Example A includes a combination of hydroxypropyl methylcellulose and a cellulosic reinforcement. In Example A, the cellulosic reinforcement is cellulose fiber. The aerosol-forming substrate of Example A also includes sodium carboxymethyl cellulose, nicotine, glycerin, and a carboxylic acid. In Example A, the carboxylic acid is lactic acid.

The aerosol-forming substrate of Example B includes a combination of hydroxypropyl methylcellulose and a cellulosic reinforcement. In Example B, the cellulosic reinforcement is cellulose fiber. The aerosol-forming substrate of Example B contains more cellulose fibers than the aerosol-forming substrate of Example A. The aerosol-forming substrate of Example B also includes sodium carboxymethyl cellulose and glycerin.

The aerosol-forming substrate of Example C includes a combination of hydroxypropyl methylcellulose and a cellulosic reinforcement. In Example C, the cellulosic reinforcement is cellulose fiber. The aerosol-forming substrate of Example C contains less cellulose fibers than the aerosol-forming substrate of Example A. The aerosol-forming substrate of Example C includes agar rather than sodium carboxymethylcellulose. The aerosol-forming substrate of Example C also includes glycerin.

The aerosol-forming substrate of Example D includes a combination of hydroxypropyl methylcellulose and two cellulosic reinforcements. In Example D, the cellulosic reinforcements are cellulose fibers and microcrystalline cellulose. The aerosol-forming substrate of Example D contains less cellulose fibers than the aerosol-forming substrate of Example A. The aerosol-forming substrate of Example D comprises agar rather than sodium carboxymethylcellulose. The aerosol-forming substrate of Example D also includes glycerin.

The aerosol-forming substrate of Example E includes a combination of hydroxypropyl methylcellulose and a cellulosic reinforcement. In Example E, the cellulosic reinforcement is cellulose powder. The aerosol-forming substrate of Example E also includes sodium carboxymethylcellulose, nicotine, glycerin, and a carboxylic acid. In Example E, the carboxylic acid is lactic acid.

The effects of the components of Examples A, B, C, and D above, including the effect of the cellulosic reinforcement, will now be illustrated in comparison to examples of comparative aerosol-forming substrates. A comparative aerosol-forming substrate includes 25.53 weight percent hydroxypropyl methylcellulose, 6.38 weight percent agar, and 63.81 weight percent glycerin.

Table 2 shows a comparison of the tensile strength of five exemplary formulations of aerosol-forming substrates (Examples A, B, C, and D) and a comparative example.

表２ The tensile strength of the exemplary and comparative formulations is determined using conventional methods by stretching a predetermined size specimen of each formulation at a constant elongation rate until break. A tensile strength testing device is attached to the specimen and provides a measure of crush strength when the formulation breaks. The tensile strength of a test piece is derived from the crushing strength at break divided by the width of the test piece.

Table 2

As shown in Table 2, the aerosol-forming substrate of Example A provides an increase in tensile strength of 256 N/m compared to the comparative example. This is a 61% increase in tensile strength.

The aerosol-forming substrate of Example B provides an increase in tensile strength of 1159 N/m compared to the comparative example. This is a 275% increase in tensile strength.

The aerosol-forming substrate of Example C provides an increase in tensile strength of 409 N/m compared to the comparative example. This is a 97% increase in tensile strength.

The aerosol-forming substrate of Example D provides an increase in tensile strength of 778 N/m compared to the comparative example. This is a 185% increase in tensile strength.

Therefore, the aerosol-forming substrates of Examples A, B, C, and D all exhibit a large increase in tensile strength compared to the comparative example. The inventors have discovered that this increase in tensile strength of an aerosol-forming substrate can provide a number of benefits, particularly related to subsequent processing steps to produce aerosol-generating articles containing the aerosol-forming substrate.

For example, after an aerosol-forming substrate is created, it is typically rolled onto a bobbin. Increasing the tensile strength of the aerosol-forming substrate may reduce breakage of the aerosol-forming substrate due to tension when the aerosol-forming substrate is transferred to a bobbin.

Subsequent manufacturing steps typically involve unwinding the aerosol-forming substrate from the bobbin and then crimping the aerosol-forming substrate using a crimping roller. Increased tensile strength of the aerosol-forming substrate may reduce breakage during the crimping process.

Reducing breakage of the aerosol-forming substrate during subsequent processing steps may reduce waste of the aerosol-forming substrate during the process of manufacturing an aerosol-generating article containing the aerosol-forming substrate. Additionally, production time can be wasted if the aerosol-forming substrate breaks during the processing process, so increasing the tensile strength of the aerosol-forming substrate can improve production time.

The aerosol-forming substrates of Examples C and D exhibit a high increase in tensile strength, but because Examples C and D contain agar, they do not cause crusting on some of the aerosol-generating articles containing the aerosol-forming substrate. It can be done. The inventors believe that when the agar is heated (eg, by an aerosol generator), the agar melts. The molten agar may form aggregates and form around portions of the aerosol generating article. Once the aerosol generating article is no longer heated, the molten agar may then cool and solidify as a crust. This includes the susceptor, as it has been found that crusting on the susceptor reduces heat transfer from the susceptor to the aerosol-forming substrate, which may reduce the level of nicotine and the amount of aerosol delivered to the user. This is a particular problem with aerosol-generating articles.

The aerosol-forming substrates of Examples A and B do not contain agar. Instead, the aerosol-forming substrates of Examples A and B contain sodium carboxymethyl cellulose. The inventors discovered that an aerosol-forming substrate containing carboxymethyl cellulose instead of agar reduced crusting. In fact, in some instances, we have found that by using carboxymethyl cellulose in place of agar, the crust problem can be completely eliminated. Reducing and eliminating crusting, particularly on the susceptor, can result in increased levels of nicotine delivered to the user and increased volume of aerosol generated from the aerosol-forming substrate.

Claims (13)

An aerosol-forming substrate for use in an aerosol generation system, the substrate comprising:
one or more aerosol-forming bodies, the aerosol-forming substrate having an aerosol-forming body content of greater than 30 weight percent;
hydroxypropyl methylcellulose,
one or more cellulosic reinforcements, the one or more cellulosic reinforcements comprising cellulose powder, and the aerosol-forming substrate has a cellulose powder content of about 0.5 weight percent to about 50 weight percent. , one or more cellulosic reinforcements. The aerosol-forming substrate of claim 1, wherein the aerosol-forming substrate has a hydroxypropyl methyl cellulose content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate of any of claims 1-2, wherein the aerosol-forming substrate has a cellulosic reinforcement content of greater than about 0.5 weight percent. 4. The aerosol-forming substrate of claim 3, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate of claim 4, wherein the aerosol-forming substrate has a cellulosic reinforcement content of about 0.5 weight percent to about 40 weight percent. An aerosol-forming substrate according to any of claims 1 to 5, wherein the one or more cellulosic reinforcements comprise cellulose fibers. 7. The aerosol-forming substrate of claim 6, wherein the aerosol-forming substrate has a cellulose fiber content of about 0.5 weight percent to about 50 weight percent. An aerosol-forming substrate according to any preceding claim, wherein the one or more cellulosic reinforcements comprise microcrystalline cellulose. 9. The aerosol-forming substrate of claim 8, wherein the aerosol-forming substrate has a microcrystalline cellulose content of about 0.5 weight percent to about 50 weight percent. The aerosol-forming substrate according to any one of claims 1 to 9, wherein the aerosol-forming substrate comprises carboxymethylcellulose. 11. The aerosol-forming substrate of claim 10, wherein the aerosol-forming substrate has a carboxymethyl cellulose content of about 0.5 weight percent to about 20 weight percent. 12. The aerosol-forming substrate of claim 11, wherein the carboxymethylcellulose comprises sodium carboxymethylcellulose. An aerosol-generating article comprising the aerosol-forming substrate according to any one of claims 1 to 12.

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