Disclosed is an apparatus for heating smokable material to volatilize at least one component of the smokable material. The apparatus includes a heating zone for receiving an article, and a magnetic field generator for generating a varying magnetic field that penetrates the heating zone. The article includes smokable material and heating material that is heatable by penetration with a varying magnetic field to heat the smokable material. The magnetic field generator includes a magnetically permeable core and a coil. The core includes a magnetically permeable first portion and magnetically permeable first and second arms extending from the first portion. The coil is wound around the first portion of the core. The first and second arms of the core are on different sides of the heating zone.

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 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 for producing an inhalable aerosol upon heating, the aerosol-generating article including: a rod of aerosol-generating substrate, the aerosol-generating substrate including at least 12 percent by weight of an aerosol former, and the rod having a length of from 5 millimetres to 50 millimetres; and a hollow tube segment with a support element and including fibrous filtration material, the hollow tube segment disposed immediately downstream of the rod and in longitudinal alignment with the rod, in which the fibrous filtration material includes fibres including a polyhydroxyalkanoate (PHA) polymer or copolymer, and in which the hollow tube segment includes at least about 25 percent by weight of the PHA polymer or copolymer. A system including an aerosol-generating device and the aerosol-generating article is also provided.

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the aerosol-generating article including: a rod of aerosol-generating substrate, the aerosol-generating substrate including at least 12 percent by weight of an aerosol former, and the rod having a length of from 5 millimetres to 50 millimetres; and a hollow tube segment with a support element and including fibrous filtration material, the hollow tube segment disposed immediately downstream of the rod and in longitudinal alignment with the rod, in which the fibrous filtration material includes fibres including a polyhydroxyalkanoate (PHA) polymer or copolymer, and in which the hollow tube segment includes at least about 25 percent by weight of the PHA polymer or copolymer. A system including an aerosol-generating device and the aerosol-generating article is also provided.

A substrate is provided comprising an aerosol-generating material, the aerosol-generating material comprising a thermoreversible amorphous solid, the thermoreversible amorphous solid comprising: 0.5-20 wt % of iota- and/or kappa-carrageenan; 20-80 wt % of an aerosol-former material; 20-70 wt % of a flavorant and/or an active substance; wherein these weights are calculated on a dry weight basis. Consumables and non-combustible aerosol provision systems comprising the substrate, as well as methods of making and using these, are also provided.

A substrate is provided comprising an aerosol-generating material, the aerosol-generating material comprising a thermoreversible amorphous solid, the thermoreversible amorphous solid comprising: 0.5-20 wt % of iota- and/or kappa-carrageenan; 20-80 wt % of an aerosol-former material; 20-70 wt % of a flavorant and/or an active substance; wherein these weights are calculated on a dry weight basis. Consumables and non-combustible aerosol provision systems comprising the substrate, as well as methods of making and using these, are also provided.

A method of making an amorphous solid is provided. The method comprises: (a) forming a slurry comprising: 0.5-60 wt % of a gelling agent; 5-80 wt % of an aerosol forming material; and 0-60 wt % of an active constituent and/or flavorant; wherein these weights are calculated on a dry weight basis; (b) depositing one or more predetermined quantities of the slurry onto a carrier using a positive displacement pump; (c) setting the predetermined quantities of slurry to form a gel; and (d) drying the gel to form an amorphous solid. Amorphous solids provided by the method, articles comprising the amorphous solids, and non-combustible aerosol provision systems comprising the articles are also provided.

A method of making an amorphous solid is provided. The method comprises: (a) forming a slurry comprising: 0.5-60 wt % of a gelling agent; 5-80 wt % of an aerosol forming material; and 0-60 wt % of an active constituent and/or flavorant; wherein these weights are calculated on a dry weight basis; (b) depositing one or more predetermined quantities of the slurry onto a carrier using a positive displacement pump; (c) setting the predetermined quantities of slurry to form a gel; and (d) drying the gel to form an amorphous solid. Amorphous solids provided by the method, articles comprising the amorphous solids, and non-combustible aerosol provision systems comprising the articles are also provided.

An aerosol-generating material including an amorphous solid, wherein the amorphous solid includes: 1-60 wt % of a gelling agent; 5-80 wt % of an aerosol-former material; and 10-60 wt % of an active substance; wherein these weights are calculated on a dry weight basis, and wherein the gelling agent includes alginate and pectin, wherein a ratio of the alginate to the pectin is from 1:1 to 10:1.