Smoking article filters
AssigneeBritish American Tobacco (Investments) Limited
InventorsDavid Lewis, Andrew Davis, John Richardson, John Major, John Sampson
Life of this patent
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Abstract
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 fibre denier in the range 7 to 9 and a second fibrous filter material having an average fibre 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.
Claims19
A smoking article filter, comprising:
- a first fibrous filter material having an average fiber denier in a range between and including 7 and 9, and
- a second fibrous filter material having an average fiber denier of less than 7,
- the second fibrous filter material being dispersed within the first fibrous filter material, and
- the first fibrous filter material and the second fibrous filter material having discrete short length fibers that are randomly oriented in the filter.
A filter for a smoking article comprising a sheet material dispersed within randomly oriented short length fibers.
A smoking article filter, comprising:
- randomly oriented short length fibers of a first material and randomly oriented short length fibers of a second material, wherein the second material comprises at least one material including at least one of polyvinyl alcohol (PVOH), polylactic acid (PLA), poly(ε-caprolactone) (PCL), poly(1-4 butanediol succinate) (PBS), poly(butylene adipate-co-terephthalate) (PBAT), starch based materials, paper, and/or aliphatic polyester materials and polysaccharide polymers.
Dependencies are inferred from the claim text.