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US 2017/0360087 A1Published application
Hydrophobic filter
AssigneePhilip Morris Products S.A.
InventorStefanos Papakyrillou
Life of this patent
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Abstract
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.
Claims20
A smoking article comprising:
- a smokable material;
- and
- a filter downstream of the smokable material and comprising filtration material, the filtration material comprising a sheet of hydrophobic cellulosic material comprising hydrophobic groups covalently bonded to the cellulosic material.
A filter for a smoking article comprising:
- a continuous sheet of hydrophobic cellulosic material distributed through a cross-section of a cylindrical filter element, the continuous sheet of hydrophobic cellulosic material has a water contact angle of at least about 90 degrees or at least about 100 degrees and a Cobb measurement value (at 60 seconds) of about 40 g/m2 or less.
Dependencies are inferred from the claim text.