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AssigneeBritish American Tobacco (Investments) Limited
InventorsYahia Lemmouchi, Andrew Davis, Barry Dimmick, Martin Dauner, Christoph Rieger, Andreas Ullrich
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The present invention relates to filter material for inclusion in a smoking article, said filter material comprising a base material comprising or made from fibers having a first diameter or mean diameter, and fine fibers having a diameter or mean diameter which is smaller than the first diameter, wherein the filter material comprises more than 10% by weight and/or by volume fine fibers or wherein the diameter or mean diameter of the fine fibers is between about 1.0 μm and about 1.5 μm. The invention also relates to filters or filter elements comprising the filter material, smoking articles comprising the same, and use of the filter material in smoke filtration.
A filter material for inclusion in a smoking article, wherein the filter material comprises a base material comprising fibers having a first diameter or mean diameter, and fine fibers on a surface of the base material and having a diameter or mean diameter which is smaller than the first diameter and which is between 5 μm and 10 μm, wherein the filter material comprises more than 10% by weight and/or by volume fine fibers and wherein the fine fibers comprise cellulose acetate.
A filter material for inclusion in a smoking article, wherein the filter material consists of fine fibers having a diameter or mean diameter of between 5 μm and 10 μm and wherein the fine fibers comprise cellulose acetate.
Dependencies are inferred from the claim text.