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AssigneeRothmans, Benson & Hedges Inc.
InventorsLarry Bowen, Stanislav M. Snaidr, Robert E. Becker, Warren A. Brackmann
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A cigarette sidestream smoke treatment material made from a sheet of non-combustible active components provides a porous structure capable of treating sidestream smoke. The treatment material, as used in combination with a cigarette, provides a low sidestream smoke emitting cigarette unit. The material has a porosity which encourages a conventional free-burn rate of a conventional cigarette. The material may comprise a sorbent capable of sorbing components of the sidestream smoke, and an oxygen storage component which releases oxygen at free-burn rate temperatures to ensure that conventional free-burn rate is maintained and to enhance the oxidation treatment of the adsorbed non-aqueous components. Preferably, an oxidation catalyst is included in the material and most desirably the oxygen storage component may also function as the oxidation catalyst. Particularly preferred materials which perform the dual function are oxides of cerium.
A low sidestream smoke emitting cigarette unit comprising
A cigarette unit comprising:
A cigarette unit comprising a cigarette and a treatment material surrounding and substantially in contact with cigarette paper of said cigarette, said treatment material having a porosity which encourages conventional free-burn rate of said cigarette and comprises an oxidation catalyst which facilitates oxidation treatment of sidestream smoke emitted from a burning coal of said cigarette, said cigarette paper decoupling said sidestream smoke treatment reaction from generation of mainstream smoke during cigarette puff.
A method of treating sidestream smoke emitted by a burning cigarette having a sidestream smoke treatment material surrounding and substantially in contact with cigarette paper of a cigarette, said material having a porosity which encourages a conventional free-burn rate for said cigarette and comprising a sorbent and an oxygen storage component which releases oxygen at free-burn rate temperatures adjacent a burning coal of said cigarette, said method comprising:
Sheet material for application to a cigarette to reduce sidestream smoke, said sheet material comprising a composition of substantially hydrophobic sorbent, sheet reinforcement and an oxygen storage component which releases oxygen at free-burn rate temperatures adjacent a burning coal of a cigarette, said sheet material having the characteristics of:
Sheet material of anyone of the preceding claims wherein said sorbent material is selected from the group consisting of activated carbon, molecular sieves and porous metal oxides.
Dependencies are inferred from the claim text.