Abstract: Cigarette filters, methods for making cigarettes and methods for smoking cigarettes are provided, which involve the use of an unfunctionalized porous polyaromatic resins, which is capable of removing at least some of at least one gas phase constituent from mainstream smoke through sorption. The unfunctionalized porous polyaromatic resin may be a polymerization product of non-polar styrene and divinyl benzene. Various gas phase constituent can be removed from mainstream tobacco smoke, such as dienes, furans, pyrroles, aromatics and ketones, for example. The cigarette filters and cigarettes can provide low resistance-to-draw and/or high total particulate matter delivery. Additionally, the unfunctionalized porous polyaromatic resin may further include flavorant(s).

Abstract: A unique filtration device (10) which removes metal ions from a contaminated aqueous stream through the use of partially hollow wicking fibers (20) impregnated with a selected liquid (18) which can capture the metal ions in the aqueous stream. The wicking fibers (20) are formed into a filter element (12) which extends from a chamber (16) through which the aqueous stream is directed into a chamber (18) wherein the unwanted metal ions are removed from the extracting liquid (18). The wicking fibers (20) include internal longitudinal cavities (22) each with a relatively small longitudinal extending opening (24). The wicking fibers (20) are filled with the selected liquid extraction (18) which remains within the fiber through capillary action by which capillary action the individual wicking fibers (20) rapidly draw the selected liquid,(18) with which they comes into contact, through the internal cavities (22).

Abstract: A cigarette filter for removing gas phase constituents from mainstream cigarette smoke as the smoke is drawn through the filter primarily comprises an activated carbon fiber filter section including a bundle of activated carbon fibers. Particulate adsorbent materials such as granules, beads or course powders may be dispersed amongst the activated carbon fibers to aid in removal of the gas phase constituents. Additionally, the activated carbon fiber filter section may be used in combination with a separate bed or beds of particulate adsorbent material. In one embodiment, the activated carbon fibers are positioned within a helical groove on the outside of a threaded rod within the activated carbon fiber filter section. Relatively smaller amounts of activated carbon fibers produce the same smoke constituent reduction as larger amounts of particulate adsorbent material.

Abstract: Fibers are produced from an acetone solution of cellulose acetate by pulling or extruding such material through a spinneret in a dry spinning process. A vacuum is applied to the thus formed fibers after a certain degree of drying. A dried outer skin is formed, and the vacuum causes the solvent inside the skin to explode or pop and exit the fiber along micro-porous paths thereby producing high surface area fibers with micro-porous cavities and internal void volume. Such micro-cavities are particularly useful for retaining solid and/or liquid reagents in a cigarette filter for selective filtration of various smoke components.

Abstract: An unique filtration device (10) which removes acidic contaminants such as H2S and SO2 from a fluid stream through the use of partially hollow wicking fibers (20) impregnated with an effective amount of alkaline-generating chemical compounds, preferably also containing an effective amount of a compound with elements from Group II and Group 6-12 in +2 oxidation state, and most preferably also containing an effective amount of solid fine particles (18). A nonwoven filter mat (12) is formed from a plurality of the elongated fibers (20) each having at least one internal channel (22) connected to the fiber outer surface via an elongated opening (24). The fluid stream containing the acidic gas phase contaminants is directed over the nonwoven filter mat (12) whereby said plurality of small solid particles (18) and reservoir of active chemical reagents disposed in the open channels (22) communicate through the elongated opening (24) with the fluid flow path and absorbs the acidic gas phase contaminants.

Abstract: A unique filtration device (10) which removes metal ions from a contaminated aqueous stream through the use of partially hollow wicking fibers (20) impregnated with a selected liquid (18) which can capture the metal ions in the aqueous stream. The wicking fibers (20) are formed into a filter element (12) which extends from a chamber (16) through which the aqueous stream is directed into a chamber (18) wherein the unwanted metal ions are removed from the extracting liquid (18). The wicking fibers (20) include internal longitudinal cavities (22) each with a relatively small longitudinal extending opening (24). The wicking fibers (20) are filled with the selected liquid extraction (18) which remains within the fiber through capillary action by which capillary action the individual wicking fibers (20) rapidly draw the selected liquid,(18) with which they comes into contact, through the internal cavities (22).

Abstract: The internal channels (22) of wicking fibers (20) are filled with a selected liquid (18) form of a prepolymerized polymer or monomers and related reagents and then the polymerization reaction is carried out under suitable conditions to form a fiber with desired properties. Fibers with the properties of the formed polymeric products are conveniently obtained thereafter. This provides a convenient way to obtain engineered fibers by directly polymerizing the monomers in the wicking fiber (20) channels (22). The wicking fibers (20) include internal longitudinal cavities or channels (22) each with a relatively small longitudinal extending opening (24). The wicking fibers (20) are filled with the selected liquid through capillary action by which the individual wicking fibers (20) rapidly draw the selected liquid, with which they comes into contact, through the internal cavities (22).

Abstract: A nonwoven filter media or mat (10) formed from a plurality of elongated generally hollow fibers (20) each having an internal cavity (22) which has an opening (24), smaller than the cavity width, to the fiber (20) surface and each retaining within the internal cavity (22) an electrically conductive material. The electrically conductive material can be a large number of relatively small conductive solid particles (18). The small solid particles (18), which can be graphite are permanently entrapped within the longitudinal cavities (22) of the fibers (20) without the use of an adhesive. The electrically conductive material can also be a selected liquid. In the case of a liquid, the wicking fibers (20) are filled with the selected conductive liquid through capillary action by which the individual wicking fibers (20) rapidly draw the selected electrically conductive liquid, with which they come into contact, through the internal cavities (22).

Abstract: A nonwoven filter media or mat (1) formed from a plurality of elongated generally hollow fibers (20) each having an internal cavity (22) which has an opening (24), smaller than the cavity width, to the fiber (20) surface and each retaining within its internal cavity (22) an electrically chargeable powder particle material. The electrically chargeable material can be a pure electrically chargeable dielectric powder material or a mixture of oppositely chargeable dielectric powder particles (18). The small solid particles (18), which can be PTFE, CTFE, halogenated polymers or any other electrically chargeable dielectric powder particles, are permanently entrapped within the longitudinal cavities (22) of the fibers (20) without the use of an adhesive.

Abstract: A unique filtration device (10) which continuously removes gas phase contaminants from an air stream through the use of partially hollow wicking fibers (20) impregnated with a fine solid carbon powder (18) or zeolites and formed into a fiber filter (12) with a selected chemisorptive liquid applied to one side of the fiber filter (12) and large carbon particles (19) applied to the other side of the fiber filter (12). The air stream to be cleaned is directed through filter element (12) which can capture the gas phase contaminants. The wicking fibers (20) include internal longitudinal cavities (22) filled with the fine carbon powder (18) and each having a relatively small longitudinal extending opening (24).

Abstract: A unique filtration device (10) which continuously removes gas phase contaminants from an air stream through the use of partially hollow wicking fibers (20) impregnated with a fine solid powder and a selected chemisorptive liquid (18) which can capture the gas phase contaminants. The wicking fibers (20) are generally disposed to extend in the same direction and are formed into a filter element (12). The air stream to be cleaned is directed through filter element (12). The wicking fibers (20) include internal longitudinal cavities (22) filled with a fine powder and each having a relatively small longitudinal extending opening (24). The wicking fibers (20) are filled with the selected contaminant removing chemisorptive liquid through capillary action by which the individual wicking fibers (20) rapidly draw the selected chemisorptive liquid, with which they come into contact, through the internal cavities (22).

Abstract: A unique odor filtration device (10) which continuously removes odor causing gas phase contaminants from an air stream through the use of partially hollow wicking fibers (20) impregnated with a selected liquid (18) which can capture odor causing gas phase contaminants. The odor removing liquid (18) is a chemical composition including sodium permanganate in combination with either sodium carbonate or sodium phosphate. The odor absorbing liquid (18) can include specialized additives such as transition metal salts and other agents such as sodium iodide for additional and broader odor removal coverage. The wicking fibers (20) are formed into a filter element (12) which extends from a chamber (16) through which the air stream to be cleaned is directed into a stripping chamber (19). The odor causing contaminants are conveyed to from chamber (16) to chamber (19) by a concentration factor induced molecular migration.

Abstract: An air filtration or fluid treatment system includes a nonwoven filter media or mat (10) formed from a plurality of elongated generally hollow fibers (20) each having an internal cavity (22) which has an opening (24) to the fiber surface and each retaining within the internal cavity a large number of relatively small solid particles (18) which interact with the air or other fluid stream to be treated. The solid adsorbent particles (18), such as activated carbon, are permanently entrapped within the longitudinal cavities (22) of the fibers (20) without the use of an adhesive or without being embedded onto or within the polymer fiber.

Abstract: A nonwoven filter media or mat (10) formed from a plurality of elongated generally hollow fibers (20) each having an internal cavity (22) which has an opening (24), smaller than the cavity width, to the fiber (20) surface and each retaining within the internal cavity (22) a large number of relatively small solid particles (18). The small solid particles (18), which can be an adsorbent such as activated carbon, are permanently entrapped within the longitudinal cavities (22) of the fibers (20) without the use of an adhesive.