A tow band (TB) for use in a cigarette filter is a tow band in which a plurality of filaments (F) made of cellulose acetate fibers are bundled together and crimped. In the tow band, a filament denier is not less than 6.0 and not more than 11.0, a total denier is not less than 5,000 and not more than 15,000, and a Cv value of the number of crimps of the tow band is not more than 4%.

There is provided an aerosol-generating article (10; 100) comprising an aerosol-generating substrate (12) and a mouthpiece (14) secured to the aerosol-generating substrate (12). The mouthpiece (14) comprises at least one filter segment (18, 20) and a substantially transparent tubular segment (22) defining an empty cavity extending substantially longitudinally through the substantially transparent tubular segment (22), wherein aerosol passing through the empty cavity during use of the aerosol-generating article (10; 100) is visible from the exterior of the aerosol-generating article (10; 100) through the substantially transparent tubular segment (22).

A component and related method of forming a component for an article for use in or as a non-combustible aerosol provision system can include a body of material extending in a longitudinal direction, where the body of material includes crimped sheet material formed having a crimp pattern including a series of substantially parallel ridges and grooves. The average spacing between adjacent ridges can be greater than about 0.3 mm and the average density of the body of material can be between about 0.1 and about 0.25 mg/mm.sup.3. The crimp amplitude can be less than about 0.7 mm or between about 0.7 mm and about 1.2 mm. The article can include an aerosol generating material and a downstream portion downstream of the aerosol generating material, the downstream portion having the component.

A filter segment for use in a filter of a smoking article includes a substrate loaded with at least one smoke-modifying agent. The substrate is located within the body of the filter segment and is formed from filter plug wrap having an air permeability ranging from about 6,000 Coresta units to about 24,000 Coresta units.

A filter included in an aerosol-generating article, according to embodiments, includes a first filter segment including a first filter element in which at least one heterogeneous material particle is contained, a second filter segment including a second filter element, and a wrapper wrapping the first filter segment and the second filter segment, wherein the first filter segment and the second filter segment are aligned in a longitudinal direction of the filter, and the first filter segment and the second filter segment are not physically separated.

A harm-reducing cigarette filter, a method for preparing the cigarette filter and an application of the cigarette filter are disclosed, and the cigarette filter includes six layers from outside to inside: a first layer includes filter cotton with an activated carbon, a second layer includes a five-hole glue, a third layer includes filter cotton, a fourth layer includes filter particles, a fifth layer includes filter cotton with filter fluid, and a sixth layer includes a silica gel cover. The cigarette filter is injection molded by utilizing non-toxic polycarbonate (PC) or polymethylmethacrylate (PMMA). The experimental research shows that the cigarette filter has good adsorption effect on tar and nicotine, and reduces smoking people to absorb harmful substance.

A component for an article for use in or as a combustible aerosol provision system includes a body of material extending in a longitudinal direction, where the body of material comprises sheet material having fibres having a length in the range 2 mm to 6 mm. The body of material can have a density in the range between about 0.1 and 0.25 mg/mm3. An article for use in or as a combustible aerosol provision system is also provided including an aerosol generating material and a downstream portion downstream of the aerosol generating material, the downstream portion including the component. A combustible aerosol provision system and a method for forming a component for an article for use in a combustible aerosol provision system are also described.

There is provided an adsorbent material comprising a porous carrier material having pores with a diameter greater than 20 nm and carrying additive particles on its external surface, wherein the additive particles comprise an additive and have a diameter of greater than 20 nm. There is also provided a smoking article filter element comprising such an adsorbent material, a smoking article comprising such an adsorbent material, and a method of preparing such an adsorbent material.

The present invention relates to improvements in filters for use in smoking articles such as cigarettes, cigars and cigarillos. The improvements, particularly but not exclusively, relate to filter capabilities and to the manufacture of such filters. In one example, a filter for a smoking article comprises a first fibrous filter material having an average fiber denier in the range 7 to 9 and a second fibrous filter material having an average fiber denier of below 7. The application also describes a filter for a smoking article comprising various other filter arrangements including absorbent and/or adsorbent materials.

A filter segment for use in a filter of a smoking article includes a substrate loaded with at least one smoke-modifying agent. The substrate is located within the body of the filter segment and is formed from filter plug wrap having an air permeability ranging from about 6,000 Coresta units to about 24,000 Coresta units.