A method for producing filters for smoking articles includes: providing a filter rod, the filter rod having a cylinder shape with a first filter rod end, a second filter rod end and a circumferential filter rod surface; providing an outer wrapper; wrapping the outer wrapper around the filter rod along a filter rod circumferential direction covering at least parts of the circumferential filter rod surface; obtaining a wrapped filter rod; cutting the wrapped filter rod perpendicular to a filter rod longitudinal direction into outer and inner wrapped filter rod segments, wherein first and second outer wrapped filter rod segments include the first and second filter rod ends, respectively, and have a length being less than 10% of a total length of the filter rod and/or less than 10 mm; and obtaining the inner wrapped filter rod segments as the filters and disposing the outer wrapped filter rod segments.

The invention provides a material which comprises a paper substrate and a nonwoven substrate having a low density which can be used as filter for a smoking or vaping article.

A tow band for heated tobacco product tip is a tow band of cellulose acetate provided by uniting and crimping a plurality of filaments into a bundle, in which a total denier is set to a value in a range of 10000 to 40000 (inclusive) and a filament denier is set to a value in a range of 6.0 to 20.0 (inclusive), and where the total denier is denoted by TD and a breaking strength of the tow band is denoted by F, a ratio F/TD is set to a value of 0.0015N/denier or more.

A tow band for heated tobacco product tip is a tow band of cellulose acetate provided by uniting and crimping a plurality of filaments into a bundle, in which a total denier is set to a value in a range of 10000 to 40000 (inclusive) and a filament denier is set to a value in a range of 6.0 to 20.0 (inclusive), and where the total denier is denoted by TD and a breaking strength of the tow band is denoted by F, a ratio F/TD is set to a value of 0.0015N/denier or more.

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the article including: a mouthpiece assembly including first, second, and third tubes; and an aerosol-forming substrate, in which the first tube abuts a downstream end face of the second tube, and the third tube abuts an upstream end face of the second tube, an internal diameter of the second tube is smaller than an internal diameter of the first tube and of the third tube, the internal diameter of the first tube is between 3 mm and 8 mm, a ratio of the internal diameter of the first tube to the internal diameter of the second tube is between 1.2 and 5, a ratio of the internal diameter of the first tube to the internal diameter of the third tube is between 0.5 and 2, and the second tube is a cellulose acetate tube.

An aerosol-generating article is provided for producing an inhalable aerosol upon heating, the article including: a mouthpiece assembly including first, second, and third tubes; and an aerosol-forming substrate, in which the first tube abuts a downstream end face of the second tube, and the third tube abuts an upstream end face of the second tube, an internal diameter of the second tube is smaller than an internal diameter of the first tube and of the third tube, the internal diameter of the first tube is between 3 mm and 8 mm, a ratio of the internal diameter of the first tube to the internal diameter of the second tube is between 1.2 and 5, a ratio of the internal diameter of the first tube to the internal diameter of the third tube is between 0.5 and 2, and the second tube is a cellulose acetate tube.

An aerosol generating article includes: a first segment arranged at an upstream end portion to be inserted into the aerosol generating device; a second segment arranged at a downstream end portion to contact a user's mouth; and a third segment arranged between the first segment and the second segment, and comprising a cooling element, wherein the first segment comprises: a first filter portion; a second filter portion; and a medium portion arranged between the first filter portion and the second filter portion, comprising an aerosol generating substrate and a pH adjuster such that an aerosol containing 20 μg or more of nicotine is discharged per puff when the medium portion is heated at a temperature of 120° C. or lower.

A filter for a smoking article comprises a mouth end filter segment and a rod end filter segment. The rod end filter segment has a passage extending longitudinally therethrough. The passage has a diameter of about 1.0 mm or greater. In one embodiment, the rod end filter segment is comprised of an infinite pressure drop material. In another embodiment, the rod end filter segment is comprised of a low pressure drop material having a hollow tubular element disposed within to define the passage with an inner diameter greater than about 1.55 mm. Air dilution means are disposed in one of said filter segments to admit ventilating air into the filter.

A filter for a smoking article comprises a mouth end filter segment and a rod end filter segment. The rod end filter segment has a passage extending longitudinally therethrough. The passage has a diameter of about 1.0 mm or greater. In one embodiment, the rod end filter segment is comprised of an infinite pressure drop material. In another embodiment, the rod end filter segment is comprised of a low pressure drop material having a hollow tubular element disposed within to define the passage with an inner diameter greater than about 1.55 mm. Air dilution means are disposed in one of said filter segments to admit ventilating air into the filter.

A smoking article includes a smokable material and a filter comprising filtration material that is downstream of the smokable material. The filtration material comprises a sheet of hydrophobic cellulosic material with hydrophobic groups covalently bonded to the cellulosic material.