An aerosol-generating article is provided, including: an aerosol-generating substrate; and a filter in axial alignment with the aerosol-generating substrate, the filter including at least one filter segment of filtration material formed of a plurality of fibres including a polyhydroxyalkanoate compound, in which the fibres have a denier per filament (dpf) of between 1.5 dpf and 2.7 dpf, in which a total denier of the fibres is between 25,000 and 40,000, and in which the at least one filter segment includes at least 20 percent by weight of the polyhydroxyalkanoate compound. A filter for an aerosol-generating article is also provided.

An aerosol-generating article is provided, including: an aerosol-generating substrate; and a filter in axial alignment with the aerosol-generating substrate, the filter including at least one filter segment of filtration material formed of a plurality of fibres including a polyhydroxyalkanoate compound, in which the fibres have a denier per filament (dpf) of between 5.0 dpf and 12.0 dpf, in which the filter segment includes at least 20 percent by weight of the polyhydroxyalkanoate compound, and in which a resistance to draw (RTD) of the filter segment is between 10 millimetres H.sub.2O and 25 millimetres H.sub.2O. A filter for an aerosol-generating article is also provided.

An aerosol-generating article is provided, including: an aerosol-generating substrate; and a filter in axial alignment with the aerosol-generating substrate, the filter including at least one filter segment of filtration material formed of a plurality of fibres including a polyhydroxyalkanoate compound, in which the fibres provide a total external surface area within the filter segment of between 0.12 square metres per gram and 0.28 square metres per gram, and in which the at least one filter segment includes at least 20 percent by weight of the polyhydroxyalkanoate compound. A filter for an aerosol-generating article is also provided.

Disclosed are cellulose acetate tows, bales, and filter rods having from greater than 9 to less than 12.5 denier per filament and from 20,000 to 40,000 total denier, for use in smoking devices, including aerosol-generating devices such as an electrically heated cigarette.

Disclosed are cellulose acetate tows, bales, and filter rods having from greater than 9 to less than 12.5 denier per filament and from 20,000 to 40,000 total denier, for use in smoking devices, including aerosol-generating devices such as an electrically heated cigarette.

This invention relates to a lyocell material for a tobacco filter and a method of manufacturing the same, and more particularly to a lyocell fiber having a modified cross-section for a tobacco filter, wherein the cross-sectional shape of a monofilament contained in a lyocell fiber is controlled to increase the external surface area of the fiber, after which then crimps are formed, thereby exhibiting properties equal or superior to those of conventional lyocell materials, even when used in a small amount.

Disclosed are cellulose acetate tows, bales, and filter rods having from greater than 9 to less than 12.5 denier per filament and from 20,000 to 40,000 total denier, for use in smoking devices, including aerosol-generating devices such as an electrically heated cigarette.

Provided is a tobacco sheet for non-combustion heating type flavor inhalers, which has high bulkiness. The tobacco sheet for non-combustion heating type flavor inhalers contains a tobacco raw material, in which the cross-sectional surface of the tobacco sheet when observed in the direction of thickness of the tobacco sheet has a corrugated shape.

Provided is a tobacco sheet having high swelling property for a non-combustion heating type flavor inhaler. The tobacco sheet for a non-combustion heating type flavor inhaler includes tobacco powder having a cumulative 90% particle size (D90) of 200 ?m or more in a volume-based particle size distribution measured by a dry laser diffraction method.

A biodegradable bi-component fiber may include a polyhydroxyalkanoate and/or polylactic acid with cellulose acetate and/or plasticized cellulose acetate for use in a filter material configured for use in a filter of a smoking article. The bi-component fiber may have a sheath-core construction where one component of the bi-component forms the core, and the other component forms the sheath of each fiber. A filter made in accordance with this design may also include non-biodegradable material.