A filter for a smoking article has improved biodegradability and improved taste during smoking of the smoking article. The filter includes a segment having a filtration substrate including natural cellulose fibres, and a wrapper at least partly surrounding the segment. The filtration substrate contains a composition including an additive for reducing phenols.

An aerosol generating article (10) for use with an aerosol generating device includes an aerosol forming substrate (20) aerosol cooling element (40) and an acid. The article may optionally include one or both of a filter and a support element (30). The aerosol cooling element, the filter, if present, and the support element, if present, are downstream of the aerosol forming substrate. The acid is downstream of the aerosol forming substrate and is positioned to interact with aerosol from the aerosol forming substrate when the aerosol generating article is used with the aerosol generating device. The acid may be in or on one or more of the aerosol cooling element, the filter, and the support element. The acid may selectively remove ammonia from aerosol generated by the article during use.

A filter element suitable for use in smoking articles may include: cellulose acetate fibers bonded together using polyhydroxyalkanoate (PHA) surrounding the cellulose acetate fibers, bonded together using PHA on surfaces of the cellulose acetate fibers, and/or bonded together using PHA. A process for producing the filter element suitable for use in the smoking articles may include: embedding a bundle of the cellulose acetate fibers with an aqueous suspension of the PHA to obtain a wet bundle of the cellulose acetate fibers covered by the aqueous suspension; shaping the wet bundle into a continuous elongated element; heating the elongated element to temperature greater than or equal to 140 C. and less than or equal to 180 C. to melt the PHA and to evaporate water from the elongated element; cooling the heated elongated element to obtain crystallization of the PHA; and/or cutting the elongated element into segments.

A filter element suitable for use in smoking articles may include: cellulose acetate fibers bonded together using polyhydroxyalkanoate (PHA) surrounding the cellulose acetate fibers, bonded together using PHA on surfaces of the cellulose acetate fibers, and/or bonded together using PHA. A process for producing the filter element suitable for use in the smoking articles may include: embedding a bundle of the cellulose acetate fibers with an aqueous suspension of the PHA to obtain a wet bundle of the cellulose acetate fibers covered by the aqueous suspension; shaping the wet bundle into a continuous elongated element; heating the elongated element to temperature greater than or equal to 140 C. and less than or equal to 180 C. to melt the PHA and to evaporate water from the elongated element; cooling the heated elongated element to obtain crystallization of the PHA; and/or cutting the elongated element into segments.

A smoking article filter includes a recess to receive a filter insert unit. The filter insert unit is secured to the filter once inserted. The filter and the filter insert unit may include additives such as flavourants, colourants or sorbents.

A smoking article filter includes a recess to receive a filter insert unit. The filter insert unit is secured to the filter once inserted. The filter and the filter insert unit may include additives such as flavourants, colourants or sorbents.

A substantially pure fraction of at least one cannabinoid is added to smokable or smokeless tobacco products to reduce the harm associated with tobacco use. The harm to be reduced includes irritation and carcinogenicity of tobacco. In a preferred embodiment a whole plant cannabis extract is mixed directly with the tobacco during the curing or manufacturing process. For cigarette applications the cannabinoids may be inserted into a cigarette filter, and/or paper. In other embodiments the cannabinoids are purified.

A substantially pure fraction of at least one cannabinoid is added to smokable or smokeless tobacco products to reduce the harm associated with tobacco use. The harm to be reduced includes irritation and carcinogenicity of tobacco. In a preferred embodiment a whole plant cannabis extract is mixed directly with the tobacco during the curing or manufacturing process. For cigarette applications the cannabinoids may be inserted into a cigarette filter, and/or paper. In other embodiments the cannabinoids are purified.

An aerosol-generating article (10) includes an aerosol forming substrate (20) and a filter (30) downstream of the substrate. The aerosol-generating article has an average radial hardness of 95.5% or greater when measured around the filter. The filter has a resistance to draw of 70 mmWG or less.

An aerosol-generating article (10) includes an aerosol forming substrate (20) and a filter (30) downstream of the substrate. The aerosol-generating article has an average radial hardness of 95.5% or greater when measured around the filter. The filter has a resistance to draw of 70 mmWG or less.